Scraper conveyor is the main equipment for coal transportation in underground coal mining face.The middle slot is the body and material carrying mechanism of the scraper conveyor,and its performance directly affects the reliability and service life of the scraper conveyor. 　　The scraper conveyor is mainly composed of the head,tail,middle groove,scraper chain and other components.The middle groove is subject to severe friction of materials,scrapers and chains during operation.The working surface is the fulcrum of the hydraulic support movement when the working surface is advanced.Therefore,the middle groove is a component with a large amount of consumption and consumption except for the sprocket assembly.By weight,it accounts for 70%to 80%of the entire scraper conveyor.Generally,each scraper conveyor has more than 100 middle grooves,and the length of each groove is 1.5m,and there are also 1.75m.In addition to factors such as materials and processing technology,the reasonable design of the central groove structure also directly affects the strength,stiffness,wear resistance and life of the central groove. 　　Due to the different types of scraper conveyors(light,heavy,super heavy,etc.),the structure of the central groove is also different.Such as: 　　(1)Welding,casting welding and integral casting of the central groove; 　　(2)Open-bottomed and closed-bottomed middle troughs; 　　(3)the middle ear groove with single push and the middle ear groove with double push; 　　(4)Different end connection devices. 　　According to the above analysis,it is known that the structural form of the middle groove of the scraper conveyor is not fixed.Luoyang Foresight can process and produce scraper accessories of various manufacturers according to different operating environments and design requirements,such as:sprocket components,scrapers,E-bolts,beams,racks,central grooves and other accessories to meet different user needs,Welcome new and old customers to inquire or visit the factory.

Luoyang Yuanjian Mining Equipment Co., Ltd. was founded in 1996. It has a factory area of more than 100 acres and more than 300 employees. It is a coal mining equipment manufacturing company integrating production and sales. Based on strong technical force, advanced processing technology and strict management system, in 2003, it has obtained mining safety certificate certificates for various product models such as scraper conveyors and conveyor reducers. In continuous development, it has now been well received in the mining equipment industry. Today I will introduce to you the hot-selling product of our company-830 series sprocket assembly. product name Tailstock sprocket assembly The sprocket shaft group is also called the sprocket assembly, which is suitable for scraper conveyors in coal mines, and scraper transferers for grooves. 　　Product Drawing No 　　158S800303 　　Applicable models:SGZ830 series scraper conveyor 　　The 158S800303 sprocket assembly is an important part of the driving part of the head of the fully-mechanized scraper.During the coal mining process,the sprocket is driven by the reducer,and the chain drives the scraper to run in the central slot,so as to achieve the purpose of transporting coal and other materials.. 　　Material of material 　　High-quality alloy steel 　　Process technology 　　The 158S800303 sprocket is a seven-tooth sprocket made of alloy steel.It is machined by a machining center and the tooth surface is quenched. 　　After the sprocket assembly has been operated for 6 months,it is installed after turning 180°so that both sides of the sprocket teeth wear evenly 　　The sprocket requires no defects such as cracks,interlayers,wrinkles,forging injuries,slag inclusion,and scarring on the surface of the forging. 　　product category 　　The use position is divided into:head sprocket shaft group,tail sprocket shaft group. 　　The supporting host plants are:Zhangjiakou coal machine sprocket shaft group,Shandong mining machine sprocket shaft group,Northwest Benniu sprocket shaft group,Shanxi coal machine factory sprocket shaft group,Zheng coal machine sprocket shaft group,Huainan long wall sprocket shaft group,Linzhou Heavy machine sprocket shaft group,Sany heavy industry sprocket shaft group,etc. 　　Foresight mining equipment always regards quality as life,strictly in accordance with the national quality management system certification GB/T19001/ISO9001:2015 standard,adopts advanced design concepts,uses modern production equipment,and perfect product testing system to ensure product quality.The product materials are selected from domestic and foreign products,and on the basis of ensuring quality,they also provide preferential prices to the market.The after-sales system is perfect,providing customers with efficient maintenance services,analyzing and solving problems that have occurred,prolonging the service life of products,and saving costs for enterprises.

Happy visionary! Luoyang Foresight sends benefits to employees! As the Spring Festival in 2020 approaches, Luoyang Yuanjian Mining Equipment Co., Ltd. will provide Spring Festival benefits to employees! Employees are the company's valuable wealth. Thank you for your hard work and hard work for a year! Under the arrangement of the company, we sent all employees a wonderful blessing and a New Year gift. This New Year's gift represents the company's meticulous care for employees! Passed on is the company's deep love for everyone. Luoyang Yuanjian Mining Equipment Co., Ltd. carefully prepared a New Year gift for employees! Welfare distribution started, let's feel the atmosphere of the scene together! Look at the people who are far-sighted and smile with joy! Good company, employee benefits will not be bad! Surprises and happiness overflowed in the faces of the employees, and the employees really felt the company's love and blessing to the extended family. In the future, let us work together to create a beautiful new year!

At noon on January 15, 2020, Luoyang Yuanjian Mining Equipment Co., Ltd. grandly held the 2019 annual summary and commendation conference in front of the office building. General Manager Fan of the company chaired the meeting, and the company's leadership team, employees and advanced individuals attended the meeting. And in the afternoon of the same day, Luoyang Yuanjian Mining Equipment Co., Ltd. provided Spring Festival benefits to employees of all departments, and thanked the employees for their hard work and dedication over the past year. President Tang took the floor to speak, affirmed the work of each department in Vision 2019, and praised the contributions of all employees. Encourage employees to love their posts and work hard, to innovate, and to pass on their positive energy. Before closing, I wish all the staff all the best in the new year. Mr. Zhang took the floor to speak, explained the challenges and difficulties encountered in Vision 2019, highly praised the staff's attitude of uniting and meeting the difficulties, and made plans and prospects for the work in 2020. The applause thundered instantly. The commendation meeting will set up two major categories and five awards, which will be the first category of the whole plant: "advanced management", "advanced team" and "advanced employees"; designated business categories: "sales champion", "learning pacesetter" ", A total of 15 people. Advanced list 1. Advanced staff (service pacesetter) Jiang Fengjuan, Zhang Junhong, Li Shanna 2. Advanced employees Wei Lirong Zhu Baoshuai Wei Guofeng Wei Guanghui Han Pengyang Fang Zhengle Shao Yibing Zhang Zhaoxu 3. Advanced Newcomer Ding Chaoyang Wang Guohao 4. Sales champion Huang Zhenhua 5. Learn to set an example Yang Hongjun The selected advanced individuals took to the podium one after another and took photos with the leaders after receiving certificates of honor, prizes and bonuses from the company leaders. I hope that all employees should take the advanced individuals who have been recognized as examples and learn the practical spirit of loyalty and initiative; learn the pioneering spirit that they dare to compete and change; learn their progressive spirit of facing difficulties; learn that they do not count Gain and loss, dedication to the overall situation. At the same time, we hope that the collectives and individuals who are commended will cherish honors, innovate and develop, strive for greater achievements, and make greater contributions to creating a new chapter in the company's high-quality development.

Laughter and resignation old age, full of pride to welcome the New Year! With the joy of harvest and full of longing for a better future, we are welcoming 2020 together! The new year opens new hopes, and a new journey carries new dreams. At the advent of New Year's Day in 2020, Luoyang Vision Mining Equipment Co., Ltd. has fought the vast number of employees and their families in every job of the company in the past year. Season's greetings and sincere thanks to leaders and customers at all levels who care and support visionary development! I wish you all good health, smooth work, happy family and good luck in 2020! Luoyang Foresight wishes you a Happy New Year!

　　One.Preparations before installing the scraper conveyor 　　(1)The staff participating in the installation and commissioning should carefully read the manual of the machine,the instructions of the supporting equipment and other relevant technical information and safety regulations,and be familiar with the structure,working principle,installation procedures and precautions of the machine; 　　(2)Check whether the form and capacity of the scraper conveyor are suitable for the working conditions; 　　(3)Check all parts,accessories,spare parts and special tools of the whole machine item by item according to the factory delivery list and technical information of the machine; 　　(4)According to the technical information provided by the whole machine,inspect the appearance quality and geometric shape of all parts and components,and repair and remove rust if there are injuries,deformations and rusts.Especially for explosion-proof equipment,it must be inspected by a full-time explosion-proof inspector,and a well must be issued before it can go down; 　　(5)Prepare installation tools and grease; 　　(6)Designate work command personnel and select the installation site. 　　In order to check the mechanical performance of the scraper conveyor,so that the installation and maintenance and operating personnel are proficient in the installation,repair and operation techniques,it is best to install and debug on the ground,and think that there is no problem before installing it in the well. 　　two.Interview installation requirements for scraper conveyor 　　(1)The machine head must be placed properly,and the stability pad does not shake; 　　(2)The laying of the central chute must be flat,stable,and straight,and the laying direction must be correct,that is,the deck of each section must face the nose; 　　(3)There must be a tight and tight gap between the coal blocking board and the groove; 　　(4)A scraper conveyor with a coal shovel board,the coal shovel board and the trough should be tight and close to each other; 　　(5)The welded joints of the circular chain shall not face the middle plate and shall not be tightened;the number of links in each section between the double chain scrapers must be equal.The direction of the scraper must not be wrong.The bolt connected to the scraper in the horizontal direction must have the head facing the running direction.The bolt connected to the scraper in the vertical direction must have the head toward the middle plate. 　　(6)The signal device installed along the scraper conveyor must meet the requirements; 　　(7)Careful inspection and trial operation should be performed after installation.Only after the operation is normal can preparations be made before installation in the well. 　　three.Procedure when installing scraper conveyor on the ground 　　(1)All installation personnel should always observe the safety operation regulations,strictly prevent the occurrence of equipment and personal accidents,and draw up the installation process documents; 　　(2)Ship all the parts for installation to the installation site and discharge them neatly according to the intended installation position; 　　(3)First install and fix the machine heads together,and connect the power supply to the motor as required; 　　(4)Pass the scraper chain through the lower chain of the headstock.The chains cannot be twisted or twisted with each other.The round chain welding joint is on the lower side; 　　(5)Install the tail part in a similar way,and connect the chain with quick joints in order to reach a sufficient length; 　　(6)Pass the chain around the head and tail sprocket respectively and connect them on the upper chain,and keep it loose; 　　(7)Install the remaining parts and components according to the general drawing of the equipment; 　　(8)Remove the sundries at the chain and check whether the connection and fastening of each part is reliable. 　　four.Precautions for no-load test run on the ground 　　(1)Jog the motor and observe whether the head and tail motors turn correctly.After the directions are the same,then turn on the motor and observe for scratches and abnormal sounds; 　　(2)The motor driven by the tail should be ahead of the motor driven by the nose.Generally,it should be controlled between 0.0035 and 0.013s/m.The accumulated time is the delay time,but the minimum leading time is not less than 0.5s.,***Large lead time is not greater than 3s; 　　(3)Start the scraper conveyor,check the motor and reducer for abnormal noise,and the temperature should not rise suddenly; 　　(4)Whether the mesh between the chain and the sprocket is normal,and whether there is a chain skipping phenomenon.Whether the scraper chain has a beating phenomenon during the transition of the machine head or the middle section.If it is jumping,it indicates that the chain pretension is too large,and the pretension should be reduced again; 　　(5)The scraper chain should be free of jams throughout the entire chain. 　　Fives.Preparation of buried scraper conveyor before going down the well 　　(1)All parts should be intact,otherwise repair should be performed; 　　(2)It is not necessary to disassemble the parts that go down the well,and the couplings and fasteners should be fastened reliably; 　　(3)The parts that need to be decomposed into the well shall be placed according to categories and marked.Small parts that are volatile and miscible shall be packed according to categories.Exposed processing and matching components(such as shaft holes,oil holes,etc.)shall be taken Prevent bumps,blockages,and dirt; 　　(4)According to the installation situation on the ground,formulate the downhole and downhole installation process,and mark the delivery location after the downhole at the obvious position of the downhole machinery. 　　six.Precautions for underground installation and commissioning of scraper conveyor 　　(1)The installation and commissioning of the scraper conveyor in the underground can be performed with reference to the order of surface installation and commissioning; 　　(2)It is installed along the bottom of the well to avoid the accumulation of mechanical parts in the upper and lower grooves; 　　(3)Lay the scraper conveyor as straight as possible to ensure its reliability and life; 　　(4)Perform no-load operation for 1 to 2 hours,and the operating conditions should meet the requirements; 　　(5)Perform multi-machine linkage load operation for 4h and check the following: 　　①Tighten all parts without loosening; 　　②The tightness of the two scraper chains is basically the same; 　　③The temperature of the motor,reducer,sprocket shaft and other parts must not exceed the allowed value of 75°C; 　　④The electrical system works normally; 　　⑤Tighten the chain again.When the tightness is full according to the specified laying length,it is advisable to loosen the two chain links below the machine head,otherwise the chain needs to be tightened again.After all parts are debugged normally,they can be put into normal use. 　　Seven.Installation requirements of scraper conveyor in fully mechanized mining face 　　(1)The tail of the scraper conveyor in a fully mechanized mining face is generally installed after the coal mining machine rides on the chute.Because the tailstock is high,installing the tailstock first increases the workload of installing the shearer; 　　(2)Install the coal fender after installing the middle tank.If the central slot is close to the coal gang and there are floating coals that hinder the installation of the shovel board,you can install the shovel board after the cutter cuts a knife,but the L-type shovel board must be installed before the coal cutter; 　　(3)The installation of the central groove is generally performed in cooperation with the installation of the hydraulic support.The central groove can be installed first and then the bracket,or the central groove can be installed while the bracket is installed to ensure the distance between the brackets.If the bracket is installed first and then the middle groove,the bracket spacing must be adjusted in time to avoid the inconsistency between the bracket and the middle groove and affect the connection of the pushing jack; 　　(4)When a monorail crane is used to install a hydraulic support in cooperation with a slide plate provided in the middle slot,all working surface scraper conveyors must be installed first,then the scraper conveyor is started,and the slide plate with the bracket is transported by the scraper chain Go to the bracket installation site.This method of installing the scraper conveyor first can not only ensure the distance between the supports,but also clean up the floating coal on the working surface at any time. 　　Eight.Installation requirements of working surface scraper conveyor head 　　(1)The position of the machine head must meet the requirements of the design position.It must be able to unload coal smoothly and ensure proper connection with the hydraulic support; 　　(2)The machine head must be positioned correctly.When using single or double traction,the driving device should be installed on the side of the goaf,and there should be a distance of not less than 700m m from the goaf pillars for pedestrians and maintenance; 　　(3)The connecting bolts of the reducer and the machine head must be fully installed and fastened.Do not install fewer bolts due to poor installation conditions; 　　(4)The machine head should be stable and the pad should not be shaken.If necessary,it should be fixed on the top beam of the machine head with a pillar.Do not support the pillar on the reducer or the head frame. 　　nine.Installation requirements for the central groove of the working surface scraper conveyor 　　(1)The laying of the central groove should be flat,straight and stable.If there are coal blocks or vermiculite on the floor,it must be removed before laying.In order to ensure the flatness and straightness of the central slot,the miner's lamp can be used at both ends for comparison and correction by light; 　　(2)The laying direction of the central groove shall be from the nose to the tail; 　　(3)The laying direction of each middle slot must be correct,that is,the lap plate of each slot must be toward the tail of the machine to ensure that the back-to-back chain runs smoothly and does not cause scratches. 　　ten.The requirements of the tight chain after the buried scraper conveyor is installed and in use are as follows: 　　(1)During the initial operation of the scraper conveyor,the gap between adjacent chute joints tends to be closer,and the gap is reduced; 　　(2)Plastic deformation and wear during the use of the scraper chain; 　　(3)The scraper chain is stretched by the drag chain during operation,resulting in elastic elongation. 　　Due to the above three situations,the scraper chain will be extended.The elongated scraper chain will loosely accumulate in the place where the tension is the smallest,resulting in accidents such as dropped chains,skipped chains or broken chains.In order to ensure the safe operation of the scraper conveyor and prevent these accidents,it is necessary to tighten the elongated and loosened scraper chain at any time. 　　eleven.Commissioning of buried scraper conveyor 　　1.Precautions during the trial operation of the scraper conveyor After the scraper conveyor is installed,you should further check whether the components are installed correctly,whether the bolts are firm,and whether the lubrication system oil is sufficient,and then perform no-load experiments. 　　2.Jog intermittently at the beginning,start and stop trial operation.First check whether the running direction of the upper and lower heads is correct;then turn on and stop the trial operation to check whether each part is scratched.After the squeegee chain has been rotated for 1 or 2 cycles,carefully check whether the parts of the squeegee chain are connected correctly and add the missing squeegee;then run it idle for 10 to 15 minutes,and then further check the condition of each part,if necessary,tighten the squeegee chain again.. 　　3.After confirming that there is no problem during dry running,you can run with load.In order to ensure the tightening of each bolt,all bolts and nuts should be tightened again after one shift. 　　Luoyang Yuanjian Mining Equipment Co.,Ltd.was founded in 1996.It integrates production and sales,has strong technical force,advanced processing technology and strict management system.The products of various product models such as scraper conveyor and reducer have obtained the mining safety certificate.We use the quality structure to bridge between us.Welcome to consult and order.

There are abnormal sounds in the reducer of any equipment. The reasons are similar or the same. For the abnormal sound of the reducer in the coal mine scraper, Henan Shuangzhi Machinery found that there are mainly the following factors: 　　1.Bevel gear adjustment is not suitable 　　The improper installation of the bevel gear in the scraper reducer will cause chattering and abnormal noise during the operation.Just adjust the bevel gear appropriately. 　　2.Bearings and gears are worn or damaged seriously 　　After the bearing or gear is worn and damaged,abnormal operation will occur during operation,and improper meshing will generate abnormal noises.The solution is to check the bearings and gears of the reducer of the scraper,and find that the worn or damaged parts are replaced in time! 　　3.Excessive bearing clearance 　　Excessive bearing clearance may also cause abnormal operation of the scraper reducer.Adjust the bearing clearance according to regulations. 　　4.There are sundries in the reducer 　　If there is no problem with the installation and accessories of the scraper reducer itself,it is also possible that debris has entered the interior,causing abnormal noise during operation,and the interior debris can be cleaned up. 　　The abnormal sound of the reducer of the coal mine scraper is usually caused by the above 4 reasons,and the solution is relatively easy to operate.Luoyang Yuanjian Mining Equipment Co.,Ltd.goes through layers of control from material selection to finished product,and the quality is trustworthy.

During the use of the scraper conveyor, due to the adverse environment of the underground, geological conditions and the cooperation of the three machines, or improper use, it will cause severe wear and failure. In order to ensure the service life of the scraper conveyor, we must use it reasonably and correctly to increase the service life and improve the work efficiency. 　　In the process of use,the wear failures are mainly caused by the following reasons: 　　1.The reducer has vibration noise or cannot bear heavy load 　　(Poor lubrication,resulting in dry friction movement between gear teeth and bearings,or the presence of impurities in the lubricating oil,resulting in poor meshing of gear teeth,resulting in tooth surface detachment;installation dimensions are not up to standard;during scraper operation Sustained intermittent hard shocks for a long time.) 　　2.Sprocket tooth wear or bearing damage 　　(The chain is too tight,causing the alternating pressure on the gear teeth to increase;the sprocket assembly has not been turned 180°in time for 6 months of installation;the hardness is too large;the floating seal of the sprocket teeth is weak;Large,causing damage to the seal ring.) 　　3.Middle groove wear 　　(The middle trough is subjected to overloading operation of the shearer under harsh working conditions,that is,the vertical pressure is applied by the shearer and the impact of the drum cutting the coal seam;large coal rocks are stuck in the trough,and the Heavy pressure;lateral and longitudinal forces of the push-pull hydraulic bracket.) 　　4.The chain is severely broken or worn. 　　(In addition to the effect of sliding friction during the operation of the chain,it must also bear large static and dynamic loads,and be subject to erosion by mineral water.) 　　After we are familiar with the cause of the wear failure of the scraper conveyor,we take preventive measures to use it properly to achieve service life and improve production efficiency.Quality is the guarantee of safety and the standard of survival for manufacturers.Luoyang Yuanjian Mining Equipment Co.,Ltd.goes through layers of control from material selection to finished product,and the quality is trustworthy.

　　At one time,some people were extremely disdainful of the idea that"foreign moons are rounder than China"and various"Chongyangmeiwai"views.However,this situation is getting worse and worse,even if they don't say it,they use a lot.The action was"shown":toilet lids,rice cookers,and foreign milk powders...even now in the mining industry,or the heavy purchase of foreign equipment,or the pressure on Chinese equipment to be inflated,is the foreign moon really better than China? 　　When it comes to imports and domestic production,it seems that one always represents the high end and the other represents the low end.Therefore,it is derived from this logic:the former is unquestionably high in price,and the latter should be low.Previously,there was a rumor on the Internet that there were many centennial brands in developed countries,and few centennial companies in China.However,is it really necessary to blame Chinese companies for not being upset?   　　equipment,for example.There are many companies producing mining equipment at home and abroad,and in today's market conditions,the phenomenon of homogeneity is also very serious.This leads to the fact that when mining companies need to purchase equipment,many manufacturers are swarming.In this process,two kinds of phenomena often appear:either the mining company believes in foreign brands,and even if the foreign brand refuses to lower the offer,it is also the best choice.It thinks that one penny is one penny;or a domestic company In order to obtain the order,I have lowered the price myself,but the mining company still relentlessly reduced the price to the point of the dilemma of the enterprise-it is a pity to abandon it and won little profit.   　　It is the nature of the enterprise to obtain the greatest benefit in business activities.Although it cannot be fully blamed,however,when the mining enterprises desperately pressed the domestic mining machinery and"popularized"foreign companies,they did not leave domestic mining equipment companies.The opportunity to"respite",let alone the space for development.And the profit space of domestic machinery companies is constantly being compressed,so naturally they cannot invest more in technology,product quality and services.In the long run,the vicious circle that will form has already loomed. 　　But is it really necessary to buy foreign equipment?Is China's equipment just perfect? 　　At present,the scale of China's industrial equipment manufacturing industry should leap to the top in the world.As an important part of the machinery manufacturing industry,the mining equipment industry has achieved good development in recent years,with a wide range of products,more stable performance,and a broader market prospect..In addition,many mining machinery and equipment are general-purpose equipment and do not have much high-precision technology.Domestic equipment can already meet the production needs.Why should we spend a lot of money to buy foreign products and have domestic products like this?Attitude?   　　At present,energy conservation,low consumption,and environmental protection have become the development goals of China's mining machinery and equipment industry.Not only that,digital,automated,and intelligent mining machinery is also emerging,constantly setting new records in the industry.Although the mining machinery technology of our country was backward for a time,the speed of catching up is obvious to all,especially by the east wind of the“Belt and Road”,it has also increased and accelerated the number and speed of getting out of China.   　　Luoyang Yuanjian Mining Equipment Co.,Ltd.was founded in 1996.The factory covers an area ofmore than 100 acres and has more than 300 employees,including more than 50 engineering and technical personnel.Is a production and sales of coal mining equipment manufacturing enterprises,in 2003 has successively obtained scraper conveyors,plastic coated cloth positive pressure air cylinders and other product models of various types of safety mark certificates.Quality is the guarantee of safety and the standard of survival for manufacturers.Luoyang Yuanjian Mining Equipment Co.,Ltd.goes through layers of control from material selection to finished products,and the quality is trustworthy.Facing countless good domestic manufacturers,why do some mining enterprises have to buy foreign equipment?It was a mystery.

　　Recently,the SZZ630/110 and SZZ730/100 along-groove scraper transfer machines produced by Luoyang Yuanjian Mine Equipment Co.,Ltd.have obtained the National Mine Product Safety Mark Certificate.Up to now,Luoyang Vision has obtained safety mark certificates for multiple products such as scraper conveyors and reducers for conveyors.The quality and safety of the products have been recognized,and the use of customers has also been guaranteed. What is a safety mark certificate for mining products? Mine product safety sign management is an important means for the state to control the safety performance of mine products through administrative licensing. Anbiao National Mine Product Safety Sign Center is authorized by the General Administration of Production Supervision and Administration to implement the management of mine product safety signs Work, organize the implementation of technical reviews, on-site assessments, product sampling inspections, legal safety signs and the supervision and management of enterprises after certification, etc., which effectively restrains the entry of fake and inferior products underground, is an effective method to ensure coal mine safety. Luoyang Yuanjian Mine Equipment Co., Ltd. was founded in 1996, with a plant area of more than 100 acres and more than 300 employees, including more than 50 engineering and technical personnel. It is a coal mine equipment manufacturing enterprise integrating production and sales. With strong technical force, advanced processing technology and strict management system, it has successively obtained scraper conveyors, reducers and plastic coated cloths in 2003. Mine safety mark certificates for various product models such as pressure cylinders guarantee the quality and safety of products. Since its establishment, Luoyang Yuanjian Mine Equipment Co., Ltd. has always adhered to the business philosophy of "people-oriented, serving the society". While constantly reforming and innovating, it has developed domestic and international markets with advanced technology and excellent quality products. In the future development, the vision will stick to the concept, be aggressive, pioneer and innovate, manufacture more mining machinery and equipment that meets the *** standard, and use safe and high-quality products to return the market and the society!

　　Luoyang Yuanjian Mine Equipment Co.,Ltd.was founded in 1996,with a plant area ofmore than 100 acres and more than 300 employees.It is a coal mine equipment manufacturing enterprise integrating production and sales.Based on strong technical force,advanced processing technology and strict management system,it has successively obtained mine safety mark certificates for various product models such as scraper conveyors and conveyor reducers in 2003.Today I will tell you about 100 cases of common knowledge of scraper conveyors. 　　1.It is mainly composed of the nose,middle and tail. 　　2.Scraper chain is divided into middle single chain,middle double chain,side double chain and quasi-edge double chain according to the arrangement. 　　3.Scraper conveyor can be used for horizontal transportation or inclined transportation.When transported along inclined transportation,the inclination angle of the coal seam should not exceed 25°,and when transported downward,the inclination angle should not exceed 20°. 　　4.The flexible scraper conveyor is allowed to bend 2°～4°in the horizontal and vertical directions to facilitate the use of the corresponding shearer and self-moving hydraulic support. 　　5.The transmission device includes a motor,a coupling,a reducer,and a main shaft. 　　6.Chute is the guide mechanism of the traction chain and cargo load of the scraper conveyor. 　　7.Chute can be divided into middle chute,regulating chute and connecting chute. 　　8.The protection device of the scraper conveyor has a protection pin protection device and a friction plate protection device. 　　9.The safety device of the scraper conveyor includes a chain break protection device,an overload protection device,a failure stop protection device,an anchor device to prevent the nose and tail from tipping over. 　　10.Common control switches for scraper conveyors are manual starter and magnetic starter. 　　11.The role of shoveling coal plate is to put the floating coal on the coal wall into the chute after passing through the chute. 　　12.The scraper conveyor at the working face must be equipped with a signal device that can send a stop or start along the entire length of the fuselage,and the distance between the signal points should not exceed 15m. 　　13.When the tandem conveyor is overlapped in a straight line,the background head should be higher than the front end 0.3m before and after 0.5m. 　　14.When the two scraper conveyors are connected in a straight line,the height of the unloading center should be kept at 0.3m,and when it is greater than 0.5m,a coal skid should be added. 　　15.When installing and putting into operation,keep the conveyor flat,straight,stable and firm,and pay attention to the tightness of the scraper chain. 　　16.The scraper conveyor cannot be forcibly started.If the scraper conveyor fails to start or cut off the safety pin three times in a row,the cause must be found and dealt with before restarting. 　　17.When stopping,the coal flow should be carried out in order from the inside to the outside,and the coal rock on the scraper conveyor should be pulled away. 　　18.“Four inspections”refers to shift inspection,daily inspection,weekly inspection and monthly inspection. 　　19."One perseverance"refers to perseverance in work positions. 　　20."Three achievements"refers to the neatness of equipment and environment,the absence of floating coal in the machine head,machine path and tail,and the realization of a civilized production environment. 　　21."Four diligence"refers to diligence in maintenance and inspection,diligence in inspection,diligence in handling oil injection problems,diligence in cleaning the head and tail coal storage pit. 　　22."Four strict"refers to strict implementation of operating procedures,strict on-site delivery,strict inspection system and strict compliance with labor discipline. 　　23.Itinerant inspection generally adopts methods such as seeing,touching,listening,sniffing,testing and measuring. 　　24.The number of inspections per tour should be no less than 2-3. 　　25.The melting point temperature of fusible alloy protection plug is generally 110～140℃. 　　26.The running time of the hydraulic coupling under braking conditions is generally not allowed to exceed 1min. 　　27.Bridge transfer machine is a kind of intermediate transfer transportation equipment commonly used in mining face. 　　28.When driving the roadway,the transfer machine can be used as a conveyor for the driving face and can be used in conjunction with the retractable belt conveyor to transport coal and gangue during the driving process. 　　29.The bridge transfer machine is composed of three parts:nose,fuselage and tail. 　　30.The effective lap length of the transfer machine and the retractable belt conveyor is 12m. 　　31.The signal must be sent before the transfer machine is started.After no one is working on or near the transfer machine,jog it and start it 2 or 3 times,then start it officially. 　　32.When the transfer machine is used in the coal roadway,the moving method can be moved by the winch traction,the horizontal oil cylinder of the hydraulic support and the specially-designed moving hydraulic cylinder. 　　33.The mobile machine in the mining face must cut off the power and open the clutch immediately after each shift and when the driver leaves the machine. 　　34.The crusher is mainly used to crush large pieces of coal and gangue to prevent damage to the conveyor belt and ensure the normal operation of the retractable belt conveyor. 　　35.Commonly used crusher types are cone crusher,jaw crusher and wheel crusher. 　　36.The driver of the crusher must pass the training and examinations and hold a certificate. 　　37.The crusher should be started under no-load conditions,the time of two jogs should not be less than 90s,and the number of continuous jogs should not exceed 5 times. 　　38.When handling large pieces of coal,rock and gangue on the transfer machine,the crusher should be blocked. 　　39.The crusher should check the operation of the sliding clutch 3 times a week to ensure safe operation. 　　40.When there is no centralized control system,the start of multiple scraper conveyors should start from the outside to the inside in the direction of the reverse coal flow. 　　41.When the scraper conveyor transports materials,there must be a special person to pick up the material at the transportation site.When two people move materials from the chute at the same time,the rear end should be moved first,and then the front end should be moved to avoid injury. 　　42.The maintenance content of the scraper conveyor includes the patrol inspection during operation to replace some wearing parts in time,adjust the scraper chain,tighten the bolts and strengthen the lubrication. 　　43 A special person must be appointed to maintain the fluid coupling and fill the working medium as required. 　　44.The working medium used in the fluid coupling is not allowed to be changed casually,only water medium or inflammable liquid is allowed. 　　45.If you need to change the melting point temperature of the fusible alloy,you must replace the protective plugs with different melting points. 　　46.When the two conveyors are overlapped and transported,the overlap length is not less than 500mm;the distance between the highest point of the nose and the highest point of the tail is not less than 300mm. 　　47.When the scraper conveyor and the belt conveyor are overlapped and transported,the overlap length and the height difference between the head and the tail are not greater than 500mm. 　　48.The fluid coupling has good transmission performance and protection function. 　　49.The use of a hydraulic coupling between the conveyor,the motor and the reducer can realize the motor light-load start or no-load start,the load starts gently,absorbs shock and eliminates torsional vibration,and realizes load balancing in multi-machine drive Protect the motor and the entire transmission system. 　　50.The fluid coupling observes the law of conservation of energy and the theorem of momentum. 　　51.The energy conversion process of the hydraulic coupling is the mechanical energy of the electric motor-the mechanical energy of the pump wheel-the kinetic energy of the working fluid-the mechanical energy of the turbine. 　　52.The hydraulic coupling is divided into static pressure liquid discharge type,dynamic pressure liquid discharge type and valve controlled extended filling type. 　　53.After the scraper conveyor stops,turn the magnetic start switch to zero position and lock it. 　　54.The coupling is the connection device between the motor and the reducer or the reducer and the main shaft of the machine head.Its main function is to transmit power and movement. 　　55.In order to prevent the conveyor from being overloaded,the general coupling is also used as a protection device when overloaded. 　　56.A reducer is a device used to change the number of motor revolutions and transmit motor torque. 　　57.The main shaft is the main component of the rotating device of the scraper conveyor,which drives the main chain wheel to draw the scraper chain. 　　58.The scraper chain is the traction mechanism of the scraper conveyor. 　　59.The chute is a guide mechanism for the traction chain and cargo load of the scraper conveyor. 　　60.The bearing of the scraper conveyor has good lubrication,no oil leakage,flexible rotation,and no abnormal noise.The temperature of the sliding bearing does not exceed 65°C,and the temperature of the rolling bearing does not exceed 75°C. 　　61.The rotation or transmission parts of the scraper conveyor should be provided with protective covers or protective railings;the tail of the machine should be covered;a bridge for people to cross the conveyor must be set up in an appropriate place. 　　62.Good lubrication can reduce the wear of machinery,and play a role in cooling,sealing,damping and anti-corrosion of components. 　　63.The basic structure of the reducer of the scraper conveyor can be divided into two types of vertical arrangement and parallel arrangement according to the direction of input and output. 　　64.The couplings used underground are mainly rigid and elastic. 　　65.When using torque-limiting hydraulic couplings,do not bring pulverized coal into the working chamber. 　　66.It is not allowed to change fusible alloy protective plugs with different melting points at will,and it is not allowed to use other materials to replace fusible alloy plugs and explosive protective plugs. 　　67.The fluid coupling should not start frequently with positive and negative loads to prevent the temperature of the working fluid from rising. 　　68.The elongation and deformation of the ring chain shall not exceed 3%of the designed length. 　　69.The layout of the chute of the scraper conveyor can be divided into parallel and overlapping. 　　70.The middle slot of the scraper conveyor is divided into two types:open bottom and closed bottom. 　　71.Post safety responsibility system of scraper conveyor? 　　Answer:(1)Workers without training or qualification certificates are not allowed to work; 　　⑵Concentrate your thoughts when starting the machine and pay attention to the signal at all times; 　　(3)Four inspections on each part of the machine.Implement the package mechanism to always keep the device in good condition. 　　⑷The implementation of"one perseverance","three do","four diligent"and"four strict". 　　72.What are the signs of chain breakage of the scraper conveyor? 　　Answer:The symptom of chain scraping of the scraper conveyor is:when the scraper conveyor is running,the scraper chain suddenly sags or accumulates under the head;the scraper chain of the double side chain suddenly skews on one side. 　　73.How does the scraper conveyor work? 　　Answer:The scraper conveyor uses an infinitely circulating scraper chain that bypasses the head sprocket and tail roller as the traction mechanism,carries the coal through the chute,drives the motor to drive the hydraulic coupling and reducer to drive the sprocket,the sprocket and The meshing of the scraper chain drives the scraper chain to run continuously,so as to transport the coal to the unloading section of the machine head to achieve the purpose of transportation. 　　74.What is the function of the chain tightening device of the scraper conveyor? 　　Answer:The function of the tightening chain device is to adjust the tightness of the scraper chain. 　　75.What are the specific requirements for the overlap of scraper conveyors? 　　Answer:When the two conveyors are lapped and transported,the length of the lap is not less than 500mm;the distance between the lowest point of the machine head and the highest point of the tail is not less than 300mm 　　76.What are the specific requirements for the overlap of scraper conveyor and belt conveyor? 　　Answer:When the scraper conveyor is lapped and transported with the belt conveyor,the lap length and the height difference between the head and the tail are not greater than 500mm. 　　77.What are the signs of the“floating chain”of the scraper chain? 　　Answer:The symptom of the"floating chain"of the scraper chain is:the motor makes a very sharp noise;the scraper scrapes too little coal,and a large amount of coal still does not flow through the unloading head at 2-3 minutes. 　　78.What are the safety devices of the scraper conveyor? 　　Answer:The safety devices of the scraper conveyor include:broken chain protection device,overload protection device,failure stop protection device,anchor device to prevent the head and tail from tipping over. 　　79.What are the advantages of magnetic starters? 　　Answer:(1)Remote operation is possible; 　　⑵Control switches can be interlocked with each other,and centralized control can be achieved; 　　⑶Complete protection device,strong safety and reliability. 　　80.What are the advantages of hydraulic coupling? 　　Answer:The fluid coupling has good transmission performance and protection performance.The use of the fluid coupling between the conveyor motor and the reducer can realize the motor light-load start or no-load start,and the load starts gently,absorbing impact and eliminating torsion.Vibration,to achieve load balancing in multi-machine drive,protect the motor and the entire transmission system. 　　81.Precautions when using hydraulic coupling? 　　Answer:(1)A special person must be appointed to maintain the fluid coupling and inject the working medium according to the regulations; 　　⑵The working medium used is not allowed to be changed casually,only water medium and incombustible liquid are allowed to be used,taking care not to bring coal powder into the working chamber; 　　(3)The speed-adjustable hydraulic coupling is filled with oil medium according to regulations; 　　⑷It is not allowed to change fusible alloy plugs with different melting points at will,and it is not allowed to use other materials to replace fusible alloy plugs and explosive plugs.If it is necessary to change the melting point temperature of the fusible alloy,protective plugs with different melting points must be replaced.The melting point temperature of the fusible alloy plug is generally 110~140℃; 　　⑸The running time of the braking system is generally not allowed to exceed 1min; 　　⑹Do not start the load forward and reverse frequently to prevent the temperature of the working fluid from rising. 　　82.The post responsibility system for bridge transfer machine drivers? 　　Answer:(1)Familiar with the technical characteristics and safety regulations,operation regulations and operation regulations of the reprinting machine operated; 　　⑵Check the roof,coal gang,support and other safety conditions around the work place; 　　(3)Check the reprinter according to the regulations; 　　⑷The spirit should be concentrated when driving,pay attention to the start,stop,stop number and the operation of the belt conveyor,and start and stop the transfer machine in time; 　　⑸Pay attention to the carrying situation of the reprinter,and promptly deal with any leaks; 　　⑹If there is abnormal sound of the reprinting machine and the accident,it should be stopped in time to deal with it; 　　⑺Clean coal powder at the tail and drum of the belt conveyor; 　　⑻Prepare spare parts and other consumables; 　　⑼Cooperate with maintenance workers to pull the transfer machine; 　　⑽Fill in the work log. 　　83.What are the provisions of the"Coal Mine Safety Regulations"regarding the use of transfer machines? 　　Answer:(1)The mobile machine in the mining face must immediately cut off the power and turn on the clutch when the driver leaves after each shift. 　　⑵The rubber jacket cables of various mobile mining machines on the mining face must be protected from water,impact,squeezing and blasting.Each shift must be inspected to find damage and deal with it in time. 　　84.How to prevent accidents caused by crushers? 　　Answer:(1)It is strictly forbidden for operators and other personnel to get close to the working crusher to prevent the rotating parts from hurting people and splashing coal and gangue from hurting people; 　　⑵The curtain must be hung up and down to prevent the broken coal and gangue from flying out and hurting people; 　　(3)When the crusher is stuck by a large piece of gangue or other debris,it is strictly prohibited to pry and move it by hand or other tool areas,and it must be stopped before processing; 　　⑷When it is found that someone in front of the crusher is pulled down by the transfer machine,the operation of the crusher and the transfer machine should be stopped immediately; 　　⑸Do not switch on when there is no signal or the signal is unclear; 　　⑹When repairing the crusher or replacing the cutter teeth,be sure to cut off the power and then lock.When the transfer machine or belt conveyor is overhauled or the crusher is broken down,its operation should be stopped and blocked. 　　85.What is"slip"? 　　Answer:When the pump wheel speed is greater than the turbine speed,there is a speed difference between the pump wheel and the turbine,called the"slip". 　　86.What is the energy conversion process of the hydraulic coupling? 　　Answer:The energy conversion process of the hydraulic coupling is:the mechanical energy of the motor→the mechanical energy of the pump wheel→the momentum of the working fluid→the mechanical energy of the turbine. 　　87.How does the hydraulic coupling work? 　　Answer:The motor drives the pump wheel to rotate→drives the working fluid to make a circular motion to generate centrifugal force→drives the turbine blade to rotate→the driven wheel rotates→output torque 　　88.What are the common torque-limiting hydraulic couplings? 　　Answer:There are three types of static pressure drain type,dynamic pressure drain type and valve-controlled extended charge type. 　　89.What are the main structures of the scraper conveyor? 　　Answer:Transmission device,scraper chain,chute,protection device,chain tightening device,pushing device,coal baffle plate and shovel coal plate. 　　90.What is the purpose of the crusher? 　　Answer:The crusher is mainly used to crush large pieces of coal and gangue to prevent damage to the conveyor belt and ensure the normal operation of the retractable belt conveyor. 　　91.What types of crushers are there? 　　Answer:Commonly used crusher types are cone crusher,jaw crusher and wheel crusher. 　　92.What are the possible causes and solutions for the hanging part of the bridge body of the transfer machine? 　　Answer:Possible causes:the connection bolts are loose or fall off;the welding seam of the connection baffle is cracked; 　　Treatment method:tighten or fill the bolts;replace with a new connection plate. 　　93.What are the possible causes of severe slippage of the hydraulic coupling? 　　Answer:(1)The fluid capacity of the fluid coupling is insufficient; 　　⑵The transfer machine is seriously overloaded; 　　⑶The scraper chain is stuck; 　　⑷The chain tensioner is in working position. 　　94.What methods are generally adopted for the patrol inspection of the scraper conveyor? 　　Answer:The patrol inspection generally adopts methods of seeing,touching,listening,sniffing,testing and measuring. 　　95.What are the uses of scraper conveyor? 　　Answer:The scraper conveyor is the main transportation equipment of the comprehensive mechanized coal mining face.In addition to transporting coal,it can also be used as the running track of the coal mining machinery and the fulcrum of the hydraulic support movement.Or a rack without chain traction,and also has the functions of cleaning the floating coal on the working face,placing cables,water pipes,emulsion pipes and so on. 　　96.What is the possible reason why the motor of the scraper conveyor cannot start or stops slowly after starting? 　　Answer:The load is too large;the electrical circuit is damaged;the voltage drops;the contactor is faulty;too much coal is pulled back;the hydraulic coupling slips. 　　97.What is the reason for the oil leakage of the sprocket assembly? 　　Answer:⑴The seal ring or oil seal is damaged; 　　⑵The bolt of the pressure cover or pressure plate is loose; 　　(3)Improper installation of the sealing ring and tight fitting; 　　⑷The screw plug of the roller is loose. 　　What are the possible reasons for the 98 sprocket assembly bearing temperature being too high? 　　Answer:The seal is damaged,the lubricant is not clean;the bearing is damaged;the amount of oil is insufficient. 　　99.What is the reason for the overheating of the reducer housing of the transfer machine? 　　Answer:The amount of oil in the box is too much or too little;the lubricating oil is used for too long;the bearing is damaged;the inside of the box is not clean. 　　100.What are the benefits of using the transfer machine in the fully mechanized mining face? 　　Answer:The use of a transfer machine in the fully mechanized mining face can reduce the number of expansion and disassembly of the retractable belt conveyor during transportation,and raise the load to facilitate loading onto the belt conveyor,thereby speeding up the movement of the coal mining face Speed,increase production efficiency,and increase coal output.

Scraper conveyor belt conveyor and two kinds of ore-mechanical equipment for the production of coal is essential to strengthen these two devices to manage and maintain the use of the process in order to ensure the normal operation of coal production.Due to the particularity of coal mine production,the requirements for safe production are very high.This article shares with you the maintenance and inspection of belt conveyors and scraper conveyors. 　　1.Preparation before starting 　　When the belt conveyor is started,make full preparations before starting.Strictly check the safe operating environment of the power transmission system and clean the surrounding environment to ensure that there is no clutter and dirt,whether the pipeline is neat,and mechanical equipment Whether some of the protection devices are in the normal protection state,the tightness of the tape should be strictly notified to prevent various failures during operation. 　　Strict observation during operation During the operation of the belt conveyor,the corresponding start signal should be issued before starting the machine,and the start can only be carried out after receiving the confirmation response.After the start,the operator should also strictly observe the mechanical equipment issued after starting.The various sound signals ensure the smooth operation of the tape.If the tape position shifts during the operation,it should be dealt with in a timely manner. 　　3.Preventive measures and precautions 　　(1)The belt conveyor normally starts when there is no load,and stops after the materials are unloaded. 　　(2)When personnel work above the belt or repair the belt,the power supply must be turned off and locked. 　　(3)The operator should stop and lock when leaving the conveyor,and the guardrail at the rear of the belt conveyor must be set on the side. 　　(4)When the belt conveyor is used to clean coal,debris or other work,it must be in contact with the machine head,and the belt switch should be powered off and locked.After processing is complete,you can input power. 　　(5)When the belt is running,please do not clean coal,debris or other work. 　　(6)The feed to the belt conveyor should be evenly fed,and the feed funnel should not be overfilled and the feed funnel will be filled with material and overflow. 　　(7)The workplace of the belt conveyor should be kept clean. 　　(8)Ensure that the motor,fluid coupling and reducer have good heat dissipation conditions. 　　(9)Check the working status of the cleaning equipment.The surface of the conveyor belt and the driving roller after cleaning should not adhere to debris. 　　(10)When loading,make sure that the materials are placed in the middle of the conveyor belt,and cannot be directly installed at a large height,so as to avoid crushing the conveyor belt of large materials. 　　(11)In the process of running,care should be taken not to start the device frequently. 　　(12)Before operation,pay attention to whether the hydraulic linkage shaft leaks oil.Once oil leakage is found,it should be dealt with in a timely manner.Regular oil quantity inspection should be carried out.If the oil quantity is insufficient,it should be replenished in time. 　　(13)Always check the tension of the steel wire rope of the fuselage.If there is slack,please tighten it immediately.After tightening the rope,pay attention to check that there is no deviation in the conveyor. 　　(14)The drum should be checked regularly,the grease ring should be filled with grease,and the flexible drum should be replaced immediately. 　　(15)The conveyor belt does not slip along the driving roller,and the conveyor belt should be tightened immediately if it is loose. 　　(16)The deviation of the conveyor belt should be corrected immediately,and the edge of the abrasive belt should not appear. 　　(17)To check the belt joint,it should be repaired or replaced in time.The wedge on the rope clamp should be tight. 　　(18)There must be no long iron in the conveyed materials to avoid cutting off the conveyor belt when the conveyor belt is disconnected. 　　4.Laying before use When laying the scraper conveyor before use,you must ensure that the scraper conveyor is laid straight and the joints are stable and tight,and the relevant padding is carried out in the recess.You can use wood to ensure that The head and tail pressure column devices of the conveyor are complete. 　　5.Lap of the working face and the machine head When the working face and the head of the scraper conveyor are overlapped,a reasonable method should be adopted to maintain a height higher than 400mm to ensure that the bottom chain will not pull back the head material. 　　6.Inspection of parts and lubrication parts 　　(1)Make sure that the scraper and screws of the scraper conveyor are complete,and set up the bridge at the position where pedestrians pass through to ensure personal safety.The***tightening chain should be used when the conveyor is unfastened and tightened.To ensure the rigorous work. 　　(2)During the management process of the scraper conveyor,the conveyor chain should also be inspected and managed to ensure that the chain is properly tightened.Regular lubrication should be performed on the parts that need to be lubricated,and qualified grease should be used to ensure the chain The degree of lubrication.When lubricating and refueling the hydraulic coupler,the power failure should be blocked,and the fusible alloy protective plug should be strictly used,and other items cannot be used instead. 　　7.Precautions during operation(1)The operator of each scraper conveyor must be operated by***personnel. 　　(2)During the operation,always pay attention to whether there are heavy objects in the scraper conveyor,and stop to start according to the signal. 　　(3)When the scraper conveyor fails and cannot be operated,it should be shut down for inspection.It is strictly forbidden to start or reverse the vehicle.It must be closely inspected to find the cause of the failure,and then start the operation after taking corresponding treatment measures.(4)Cautions for scraper conveyors when transporting materials:voice signals can be used to communicate with operators;materials should be smooth and stable;when large materials are transported,personnel must observe the transportation of materials along the way and send messages in time Or signal contact;do not use scraper conveyor for bending materials and overweight and overweight materials. 　　8.Maintenance of scraper conveyor and transfer machine 　　(1)During the maintenance process of equipment,standardized operation and maintenance shall be carried out in strict accordance with the relevant provisions of the"Coal Mine Safety Regulations"to ensure accuracy and safety during the entire maintenance process.The maintenance of the conveyor and the maintenance of the support should be carried out at different locations to ensure the safety of the maintenance environment. 　　(2)Tighten the chain and pinch the chain to run the adjustment chain to the machine head at about 3 meters to stop,fix the chain wedge on the fourth frame,reverse the conveyor belt,one person approaches the brake,wait for it to reach the correct position,tighten Brake and tighten the chain brake to return the conveyor to the forward position,move the conveyor slightly,remove the chain stopper,and then perform a trial run.The order of the tight chain and the chain should be strictly followed,and personnel must avoid the direction of the chain.When tightening the chain,someone must hold the brake and do not loosen or operate the scraper conveyor. 　　(3)During the maintenance of the scraper conveyor,the operator of the scraper conveyor should ensure the integrity and safety of the bracket on the side of the goaf of the conveyor head,at a position away from the rear of the transfer machine Carry out strict operations and arrange special personnel to take care of the head and tail to ensure the safety of the entire inspection process. 　　(4)The head of the scraper conveyor and the conveyor should be reasonably overlapped,and the material should not be pulled back. 　　(5)The gearbox of each equipment,the oiling part of the coupling and the exposed shaft must be protected with iron,the protection device is intact,and the machine tail is transferred.There should be protective iron at the tail of the conveyor on the working face,and bridges should be frequently installed.In the process of mining operations,due to the harsh environment and complexity,especially in the process of mechanized operations,the safety performance requirements are extremely high.Only by strengthening the management of mining machinery and equipment to ensure the safety performance of the use Effectively improve the working efficiency of coal mine production,so as to ensure the economic and social benefits of coal mine production.