Conveyor
       Conveyor is in a certain line on the continuous transport of materials, material handling machinery, also known as continuous conveyor. Conveyors can be horizontal, inclined and vertical transport, can also be composed of space transmission lines, transmission lines are generally fixed. Conveyor conveying capacity, long distance, but also in the delivery process at the same time to complete a number of process operations, so the application is very extensive.

One: Conveyor History:
       In the 17th century, the use of aerial ropeway began to transport bulk material; in the middle of the 19th century, the delivery of various modern structures was carried out in the middle of the 19th century. Machine appeared one after another.
       In 1868, a belt conveyor appeared in the UK; in 1887, a screw conveyor appeared in the United States; in 1905, a steel belt conveyor appeared in Switzerland; in 1906, inertial conveyors appeared in the UK and Germany. Since then, the conveyor by the mechanical manufacturing, electrical, chemical and metallurgical industry, the impact of technological progress, and constantly improve the gradual completion of the workshop through the delivery, development to the completion of the enterprise, between enterprises and even between the city material handling, Handling system mechanization and automation indispensable components.
Second: Conveyor generally according to whether the traction to sort.
       A conveyor having a traction member generally comprises a traction member, a carrying member, a driving means, a tensioning means, a redirecting means and a supporting member. Traction parts used to convey traction, can be used conveyor belt, traction chain or wire rope; bearing components used to hold the material, a hopper, bracket or spreader, etc .; drive to the conveyor to power, generally by the motor, Brake (stop) and other components; tensioning device generally have screw and heavy hammer two, can make the tractor to maintain a certain tension and sag, to ensure the normal operation of the conveyor; support to support the traction or Bearing components, can be used roller, roller and so on.
       The conveyor is characterized by the fact that the conveyed material is contained in a load bearing member which is connected to the traction member or directly on a traction member such as a conveyor belt which passes around each drum or sprocket Are connected to form an unloaded branch including an unloaded branch of the conveyed material and an unloaded branch of the non-transporting material, and the material is conveyed by the continuous movement of the traction member.
       This type of conveyor a wide range, mainly belt conveyor, plate conveyor, car conveyors, escalators, moving sidewalk, scraper conveyor, buried scraper conveyor, bucket conveyor, bucket elevator , Hanging conveyor and aerial ropeway and so on.
       The structure of the conveyor without traction is different and the working members used to transport the material are not the same. Their structural features are: the use of the working parts of the rotary motion or reciprocating motion, or the use of media in the pipeline flow of material forward delivery. For example, the working member of the roller conveyor is a series of rollers, the rollers are rotationally moved to convey the material; the working parts of the screw conveyor are helical and the screw is rotationally moved in the trough to push the material along the trough; The components are the troughs and the troughs are reciprocated to transport the material placed therein.
       The future of the conveyor will be toward the large-scale development, expand the scope of use, automatic sorting materials, reduce energy consumption, reduce pollution and other aspects of development.
       Large-scale, including large transport capacity, large single-machine length and large transport angle and so on several aspects. The length of the hydraulic transmission device has reached 440 km or more belt conveyor single machine length of nearly 15 km, and has appeared by a number of units linked to B and B "belt conveyor". Many countries are exploring long-distance, large transport capacity of continuous delivery of materials more perfect conveyor structure. The use of expanded conveyors refers to the development of an environment that can operate in corrosive, radioactive, flammable substances at high temperatures and low temperatures, as well as conveyors that can transport hot, explosive, agglomerated, viscous materials The
Three: the above described for the bulk transport machinery, transport machinery according to the use of points can be divided into:
1, bulk transport machinery (such as: belt conveyor \ screw conveyor \ bucket elevator \ large angle conveyor, etc.)
(1) belt conveyor by the drive device tensioning device conveyor belt middle frame and roller composed of conveyor belt as a traction and bearing components, in order to continuously transport the broken material or pieces of goods.
       Belt Conveyor is a friction-driven machine that continuously transports material. Application of it, the material in a certain transmission line, from the initial feeding point to the final discharge point between the formation of a material transport process. It can be carried out fragile material delivery, can also be carried into pieces of goods delivery. In addition to pure material delivery, but also with the industrial production process in the process of matching the requirements of the formation of a rhythm of the water transport operations. So belt conveyor is widely used in a variety of modern industrial enterprises.
       In the underground mine roadway, mine ground transportation system, open pit and concentrator, the widely used belt conveyor. It is used for horizontal or tilting transport.
       General belt conveyor by the conveyor belt, roller, roller and drive, brake, tension, change to, loading, unloading, cleaning and other devices.
① Conveyor belt
Commonly used rubber belt and plastic belt with two kinds. The rubber band is suitable for working ambient temperature between -15 ~ 40 ° C. Material temperature does not exceed 50 ° C. The inclination of the pellets is 12 ° to 24 °. For large angle conveyor belt available rubber band. Plastic belt with oil, acid, alkali and other advantages, but for the climate of poor adaptability, easy to slip and aging. Bandwidth is the main technical parameter of belt conveyor.
② roller
(Single drum angle of 350 °) and multi-drum (for high power) and so on. Slotted roller, flat idler, aligning roller, buffer roller. The carrier roller (consisting of 2 to 5 rollers) supports the bearing branch for conveying the particulate material; the aligning roller is used to adjust the lateral position of the belt to avoid deviation; the cushioning roller is mounted at the receiving Reduce the impact of the material on the belt.
③ roller
Sub-drive roller and re-direction roller. Driving the drum is the main part of the transmission power. (Single drum angle of 350 °) and multi-drum (for high power) and so on.
④ tension device
       Its role is to make the conveyor belt to the necessary tension, so as not to slip on the drive roller, and the conveyor belt between the roller to ensure that the deflection within the specified range.
The Technical Advantages of Belt Conveyor
       The first is that it runs reliably. In many important production units that require continuous operation, such as the transportation of coal in power plants, the transportation of bulk materials in steel mills and cement plants, and the use of belt conveyors in ships and in ports. If the downtime in these cases, the loss is huge. If necessary, the belt conveyor can work in a row to work continuously.
       Belt conveyor with low power consumption. As the material and conveyor belt almost no relative movement, not only the running resistance is small (about scraper conveyor 1 / 3-1 / 5), but also on the cargo wear and fragmentation are small, high productivity. Which are conducive to reducing production costs.
       Belt conveyor conveyor line adaptability and flexibility. The length of the line depends on the needs. Short a few meters, up to 10km or more. Can be installed in a small tunnel, can also be erected in the ground traffic chaos and dangerous areas over.
       According to the requirements of the process, the belt conveyor is very flexible from one or more points by the material. It is also possible to discharge the multipoint or several sections. When feeding at the same time at a number of points to the conveyor belt (such as a conveyor under a coal seamer in a coal preparation plant) or at any point in the length of the belt conveyor through a uniform feeding device to the conveyor belt, Machine to become a major transport trunk.
       Belt conveyors can be reclaimed in the roadway below the coal storage pile and, if necessary, mix the different materials. The material can be simply discharged from the head of the conveyor or unloaded at any point in the length of the conveyor belt by means of a plow unloader or a moving unloader.
(2) screw conveyor commonly known as the dragon, for granular or powdery material horizontal transport, tilt transport, vertical transport and other forms. Transmission distance varies according to the deformity, generally from 2 meters to 70 meters.
Conveying principle: Rotate the spiral blade to transfer the material and carry the screw conveyor. The force that does not rotate the material with the screw conveyor blade is the weight of the material itself and the frictional resistance of the screw conveyor housing to the material.
Structural features: screw conveyor on the rotating shaft with a spiral blade, the blade surface type according to the different materials are solid surface, belt type, leaf surface type and other types. The screw shaft of the screw conveyor has a thrust bearing at the end of the direction of movement of the material to the axial reaction force of the screw with the material. When the length of the screw is longer, the bearing should be suspended.
       The double screw conveyor is a screw conveyor with two rotary shafts with rotating blades. Plainly, that is, the two screw conveyor machine organically together to form a screw conveyor.
The rotation of the rotary shaft of the screw conveyor determines the direction of conveyance of the material, but the general screw conveyor is designed to design the rotating blades according to the individual transport. When the reverse delivery, will greatly reduce the conveyor life.
(3) bucket elevator using a uniform fixed on the endless traction components on a series of hoppers, vertical lifting material continuous conveying machinery.
The bucket elevator has the advantages of large quantity of transportation, high lifting height, stable operation and long service life. Its main performance and parameters are in accordance with JB3926 ---- 85 "vertical bucket elevator" (the standard is equivalent to the international standard And foreign advanced standards), traction ring chain in line with MT36 ---- 80 "mine high-strength round chain", the elevator is suitable for conveying powder, granular and small pieces of no grinding and grinding Small materials, such as coal, cement, stones, sand, clay, ore, etc., because the traction mechanism of the hoist is a circular chain, thus allowing the delivery of higher temperature materials (material temperature does not exceed 250 ℃). General delivery height up to 40 meters.
2, logistics and transportation machinery (such as: assembly line, assembly line equipment, transmission lines, hanging conveyor line, lifts, pneumatic lifts, rack racks, scissors, lifts, roller conveyors, lifts).