Impact roller for belt conveyor to reduce the impact of blanking on the conveyor belt impact.Mainly for coal preparation plant,coking plants,chemical plants and other corrosive environment developed a class of roller.It has its own toughness is more than 10 times the ordinary metal, life of five times the traditional cast iron, corrosion-resistant flame retardant, anti-static, light weight and other characteristics,Widely used in mining.Roller body for the polymer material, its mechanical properties similar to bronze, has a good wear resistance, and has good self-lubricating properties, do not hurt the belt.Buffer roller anti-corrosion performance is superior.Roller and seals are made of polymer materials, corrosion resistance.In the case of corrosive use, the service life can reach more than 5 times the normal roller.
(1)Impact roller temperature protection
Belt conveyor roller and belt friction to the temperature exceeds the limit, close to the drum installation of the detection device issued over-temperature signal.Receiver received the signal, the delay by 3s, so that the implementation of part of the action, cut off the motor power supply, conveyor automatically stop, play a role in temperature protection
(2)roller group speed protection
If the conveyor fails, such as the motor burned, the mechanical transmission part of the damage, belt or chain pull off, belt slip, etc.The magnetron switch in the accident sensor SG mounted on the conveyor passive parts can not be closed or can not be closed at normal speed.At this time the control system will be anti-time characteristics after a certain delay, the speed protection circuit work, so that the implementation of part of the action, cut off the motor power supply to avoid the accident to expand.
(3)Impact roller Coal bunker Protection
The coal bunker is equipped with two coal bit electrodes.Coal bunkers because no empty cars can not be coal, the coal will gradually increase,When the coal bit rises to the high level electrode, the coal position protects the action.Starting from the first belt conveyor, each conveyor in turn because of the tail pile.
There are two reasons for short-term damage to the impact roller:1.Due to the dust point of the material, the buffer roller seal is poor when the pollution can easily lead to damage to the bearing.2.Impact aprons are basically produced using recycled rubber, not only poor elasticity, abrasion resistance, tear resistance, resistance to aging are poor.Impact hours, the service life of only about 1 year, the impact of large, ten days will break off, the belt has serious damage.In the case of helplessness, many belt machines began to use expensive buffer bed.At present, two key issues our company has been resolved:1.The new labyrinth seals ensure that the bearings are never contaminated and that the bearing life is 100,000 hours or more.2.Apron replacement for the car tire rubber, prominent wear, impact resistance, tear resistance, anti-aging, high elasticity and other comprehensive performance, so that the life of the buffer roller to improve 20 times higher than the economic efficiency of the buffer bed 10 times.
The application of the idler in the belt conveyor is very important, it supports the conveyor belt, and bear the weight of the material.This shows that the role of roller is very important. So the structural performance of the roller is even more important.
Impact roller dedicated polymer material, light weight, the proportion of steel is one-seventh, with this material made of roller, the weight of ordinary roller accessories about one-half.Rotational inertia is small, the friction between the roller and the belt is small, effectively reducing the friction.Reduce the roller spacing can reduce the analog friction coefficient, but the total resistance will increase, except in the unloading point for the protection of the tape outside the general load section do not increase the roller density.In addition, the buffer roller rubber ring wear resistance, long service life. Roller body for polymer materials, its continued performance similar to bronze, has a good wear resistance, and has good self-lubricating properties, do not hurt the belt.There are many types of buffer rollers, such as spring plate type, buffer type, strong buffer type, and so on. So in the choice of time must choose the appropriate.When selecting the idler, pay attention to the radial runout of the idler, the flexibility of the idler, and the amount of axial.In the material gap greater than six meters above the location, we have to use the buffer roller, which can not only effectively reduce the belt material impact, wear, but also to prevent the belt was hard objects tear.
It can be seen that the idler is very important for belt conveyors. Choose a good roller, to ensure the normal production, can better improve efficiency.