The technical level of belt conveyor has made great progress. The hub technology research new production development of high-power long interval belt conveyor used in coal mine have made great progress. For example, the complete set of equipment for large inclined angle long interval belt conveyor, the high-yield high-efficiency working face chute retractable belt conveyor so on have filled the domestic vacancy. The theoretical research product development of the key technology its main components of the belt conveyor have been carried out, a variety of soft starting braking devices programmable electric control device with PLC as the core have been developed successfully. The driving system adopts adjustable control High speed hydraulic coincidence planetary gear reducer.

Sand machine equipment is specially used to produce sand for construction, mainly including sand machine, sand washer, crusher, vibrating screen, vibrating feeder, etc. Generally, a sand making production line includes: vibrating feeder, jaw crusher, sand making machine, vibrating screen, sand washer belt conveyor. Sand making equipment is a kind of special equipment for the production of building sand stone, which can save 50% energy than the traditional sand making machine. It can make all kinds of rocks, sand stones river pebbles into construction sand with various grain sizes. The sand has uniform grain size high compressive strength, which is far more in line with the construction requirements than natural sand sand produced by ordinary hammer type sand beater, can improve the construction quality.

In fact, the stone sand making machine is our commonly used impact crusher. Its working principle is: the material enters the crusher the feed hopper, the material is divided into two parts by the distributor. One part enters the high-speed rotating impeller the middle of the distributor, is rapidly accelerated in the impeller, whose acceleration can reach hundreds of times of the gravity acceleration, then evenly distributed three parts of the impeller at the speed of 60-70 M / s It is ejected the flow channel of the engine.

Dynamic analysis monitoring technology of belt conveyor. Dynamic design monitoring is the key technology of long interval high power belt conveyor, which is the core technology restricting the development of large belt conveyor.