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河南理工大学万方科技学院本科毕业设计（论文） 1 Scraper conveyorScraper conveyorScraper conveyorScraper conveyor Tractionwith scraper chain, in the bed of the delivery of bulk material conveyor called scraper conveyor. Scraper conveyor trough in the middle of the adjacent level can be limited vertical bending is called flexible scraper conveyor. One body in the face and transport interchange roadway was 90-degree bending of the face conveyor set called “scraper conveyor corner.“ oal face in the current, the scraper conveyor is not only the delivery of coal 河南理工大学万方科技学院本科毕业设计（论文） 2 and materials, but also a shearers orbit, so it into a modern coal mining process of the major equipment indispensable. CScraper conveyor functions to maintain continuous operation, production can be carried out normally. Otherwise, the whole coal face production status will be shown, so that disruption of he entire production. Scraper conveyor components by what? Various types of scraper conveyor of the main structure and composition of the basic components are the same, it is by the head, middle and tail of three machine parts.In addition, for overt conveyor equipment used hydraulic jacks and tight chain tight when the subsidiary components such as chains. Machine head by the head frame, motor, fluid coupling,reducer, such as pieces of the composition and sprocket. The transition from the central trough, the central groove, scraper chain and the composition of such pieces. Rear scraper plane for the return of the device chain. Heavy-duty scraper conveyor tail and nose of the same are also provided with power transmission devices, from the install location to distinguish under the name on the nose and head. Scraper conveyor of work?Scraper conveyor of work?Scraper conveyor of work?Scraper conveyor of work? Scraper conveyor of the working principle and basic structure, and our country in the years 186-189 AD between the invention of “roll-over“ - water is the same keel. However, the use of scraper conveyor transported materials kibbling is the beginning of this century developed in the United Kingdom industry. Scraper conveyor 河南理工大学万方科技学院本科毕业设计（论文） 3 early, simple structure and light, then it is only used to transport coal, manual loading of coal; low transport capacity, a maximum of only a few dozen tons per hour; conveyor only tens of meters in length;-power small, traction chain the intensity is not high. After years of improvement and development, with fully mechanized coal mining face of the scraper conveyor, in addition to coal, there are four functions: to the shearer for orbit; to pull shift hydraulic support for fixed-point shift care ; clean up floating face coal; hoisting cables, pipes, tubes, etc. emulsion. Scraper conveyor in fully mechanized coal face shearer and hydraulic support and co-ordination work. Scraper conveyor of the working principle is to open the chute, as coal, waste or materials, such as pieces of the bear will be fixed in the chain scraper (scraper chain component), as components of traction. When the Department of nose after transmission, the chain wheel drive shaft rotating head, so that the cycle runs driven scraper chain stores along the chute to move the head up to the unloading machine. Scraper chain sprocket for no class to bypass the closed cycle operation, the completion of the delivery of materials. Scraperconveyor What advantages and disadvantages?Scraperconveyor What advantages and disadvantages?Scraperconveyor What advantages and disadvantages?Scraperconveyor What advantages and disadvantages? Scraper conveyor is the main advantages and disadvantages: advantages: 1, the structure of a solid. Can withstand coal, waste or other materials of red, hit, hit, pressure and other external force. 河南理工大学万方科技学院本科毕业设计（论文） 4 2, able to adapt to uneven floor coal face, bending over the need for vertical or horizontal can withstand the bending direction. 3, body short, easy to instal. 4.can act as Shearer orbit. 5.can reverse run, easy to deal with the accident at the end of chain. 6.fluid can be the fulcrum of the preceding night stand. Disadvantages: 1.no-load power consumption of a greater power for the total about 30%. 2.not long-distance transmission. 3.prone to swap chain, jumped the accident chain. 4, consumption of steel and more. Costs. Scraper conveyor through several stages of Scraper conveyor through several stages of Scraper conveyor through several stages of Scraper conveyor through several stages of development?development?development?development? Scraper conveyor in the production of coal mine development and construction, more or less gone through three stages. The first phase of 30-40 years, is detachable scraper conveyor, which can only be a straight line in the face with the laying, with the face forward, need manual demolition, removal, assembly. Scraper chain plate, more than a single chain, such as V-type, SGD-11 type, SGD-20 type, such as low-power light scraper conveyor. The second 河南理工大学万方科技学院本科毕业设计（论文） 5 stage is the early 40s from Germany to produce flexible scraper conveyor, with Shearer, metal stent with a mechanized mining. Cough such scraper conveyor to adapt to uneven floor and the level of convex curved surfaces, such as conditions shift, is not required for demolition, and coal have also increased, such as the Model SGW-44-type scraper conveyor is the phase of the representative products. Into the 60s as a result of the emergence of hydraulic support, in order to meet the needs of fully mechanized mining, scraper conveyor to the third phase of development, developed a cough sheathed high-power heavy-duty scraper conveyor bending, such as SGD-630/75 type, SGD -630/180 type belonging to this stage is the product. To the 70s, with a large number of applications shearer, a SGW-40, SGW-44-type scraper conveyor can be curved to achieve the non-disintegration and sub-delivered non-stop since the transfer, transport capacity to 200 t / h. Since the 80s, will soon face the development of transportation equipment, due to the emergence of new types of coal cutter, scraper conveyor has a vastly different situation. Shearer to be a result of walking in the conveyor, conveyor requires not only strength to ensure stability in the work of Shearer, and to match production capacity with the shearer to keep the scraper conveyor of heavy development. Models are representative of SGW-150 and SGW-250 type. With the emergence of high-power shearer, a number of scraper conveyor of power has reached 800 900 kW, the transport capacity of 2000 2500t / h, can yield 300 to adapt 河南理工大学万方科技学院本科毕业设计（论文） 6 to face four million t / a production-scale requirements of 3. Scraper conveyor 90 during transport capacity in order to achieve the 3500t / h, from the corresponding Width 730 760mm increased to 980 1100mm, chain speed from 1m / s increased to about 1.57m / s, scraper conveyor has the power 1600kW.At present, with the coal face of increasing production capacity, scraper conveyor major trends are: 1.big traffic. Countries have advanced the development of coal transport capacity of up to an hour 1500t (80s) 3500t (90s) of the scraper conveyor. .long distance transport. Stage in order to reduce the coal mining area of the loss column, increase the length of face, the length of scraper conveyor has reached more than 335 meters. .high-power electric motors. Electrical power has been developed to the single-speed motor of 525kW, two-speed motor 500/250kW. .long life. As a result of the use of large-diameter ring chain, an increase of the intensity of scraper chain, extended the life span of scraper conveyor, coal machine had reached more than 6,000,000 tons. New type of scraper conveyoNew type of scraper conveyoNew type of scraper conveyoNew type of scraper conveyor r r r Down the coal mining, or other useful minerals, and only have value out of mine. Therefore, the process of coal production and transport is a very important part. Scraper conveyor coal shipment is the first link, the scraper conveyor of transmission capacity 河南理工大学万方科技学院本科毕业设计（论文） 7 in the coal face to a large extent determines the capacity and efficiency. However, in the face of transport and underground tunnel, and roadway conditions are based on coal, according to the needs of the mining method, the integration of the requirements of the rock in the coal seam or cut out. Therefore, the underground transport is characterized by the conditions: cross-section of the roadway in a limited run; line is staggered and tilted to connect; transport of goods in a variety of cargo; loading points often change, and some lines need to be extended or shortened; mechanized mining coal production, hours of high productivity; environmental humidity, and some workplaces have gas or coal dust. It can be seen that as a coal face and the coal mining area of roadway machinery - scraper conveyor in use, it is necessary to bear the pull, pressure, bending, impact, friction and corrosion and other effects, there must be sufficient strength, stiffness, wear resistance and corrosion resistance. Mode of transport because of its materials and scraper chain sliding in the bed, running resistance and wear great. However, he coal in the coal face, there is no better machine to replace it. Only from the structure, strength and manufacturing processes to look at improving constantly, making it more comprehensive, durable. This shows that the scraper conveyor is to transport coal and other minerals essential for the transport machinery. Scraper conveyor in the coal mine fully mechanized coal mining face major task is to take the coal shearer continuously reproduced to 河南理工大学万方科技学院本科毕业设计（论文） 8 machine, to ensure that the fully mechanized coal mining face straight out of the coal.Scraper conveyor in coal mines, chemical mines, metal mines and power plants and other materials used to transport an important means of transport. It is from the central tank, chain, scraper and traction system. Among them, the central scraper conveyor trough is a major part of the central trough of steel has nearly a hundred years of history, in the course of a long-term use of the following shortcomings: the weight of large, time-consuming installation and removal; central trough is generally 6 15mm from the plate made by the larger deformation of the shock easy, more difficult to repair; poor corrosion resistance; poor wear resistance; the materials and the friction coefficient of the central trough, and the power scraper conveyor large part of consumption in the materials and the friction on the central trough, resulting in excessive energy consumption, increased investment. UHMWPE is used to create scraper conveyor in the plate, steel plate to resolve the problems, the plastic scraper conveyor. For small scraper conveyor can be modified to produce ultra-high molecular weight polyethylene scraper conveyor. Shearer for the above large-scale walking scraper con