In 1868, in the UK there belt conveyors; 1887, appeared in the United States of screw conveyor; 1905, in Switzerland the strip conveyor; 1906, in the UK and Germany emerged inertial conveyer. Thereafter, conveyer by machinery manufacturing, motor, chemical and metallurgical industry technology progress effect, perfect ceaselessly, progressively by complete workshop internal transportation, development to completion in the enterprise, between enterprises and between the city of material handling material handling system, become the mechanization and automation part.
There is no traction conveyor according to the general classification.
A traction member conveyor generally include traction, bearing components, driving device, tension device, and supporting device etc redirection. Traction is used to transmit tractive force, the conveyor belt, traction chain or wire rope; bearing member for the material, with a hopper, bracket or a sling; driving device for conveyor with power, generally by the motor, a reducer and a brake ( stop) and other components; the tensioning device generally has a screw type and a heavy hammer type two, can make the traction to keep certain tension and sag, in order to ensure the normal operation of conveyor; a support for supporting the traction member or bearing component, the roller, roller.
A traction member conveyor structure characteristic is: be transported material mounted on and traction piece together the bearing component, or directly mounted on the traction member (such as conveying belt ), traction around each roller or sprocket end to end, including the formation of bulk material loading and transporting materials branch of no load branch closed loop, using traction continuous movement of the conveying material.
This kind of conveyor variety, main belt conveyor, slat conveyor, trolley conveyer, escalators, automatic sidewalks, scraper conveyor, scraper conveyor, bucket conveyer, bucket elevator, conveyor and aerial tramway.
No traction conveyor structure composed of each are not identical, is used for conveying materials work components are not the same. The structure is characterized in : using components of the rotary motion or reciprocal motion, or the use of medium in the pipe flow of material is transported forward. For example, roller conveyor working component is a series of rollers, the roller rotates to the transportation of materials; screw conveyor of the working member is a spiral, spiral in the material groove to rotate along the trough to push material; vibration conveyor working component as the chute, chute for reciprocating motion to transport in the materials and so on.
Future conveyor will be large-scale development, expanding the use range, automatic material sorting, reduce energy consumption, reduce pollution and other aspects of development.