Improvement of Parallel Roller in Conveyor

Belt conveyor is a general series of products, which is widely used in metallurgy, coal, mining, port, petroleum and chemical industries. It conveys materials by single or multi-unit synthetic transportation system. General belt conveyor is composed of conveyor belt, idler, drum and drive, brake, tension, direction change, loading, unloading and cleaning device. The utility model has the advantages of simple structure, reliable operation, strong transportation capacity, low transportation cost and simple maintenance.     

 

During the use of parallel idlers and drums of belt conveyors, surface corrosion and slippage of belt conveyors occur due to direct contact with materials, local resistance increases, and transportation costs are too high. Based on the problems existing in the use of belt conveyor, the improvement scheme of parallel idlers and drums is put forward.

 

Improvement of 2 Parallel Rollers

 

The idler is an important part of the belt conveyor, which is used to support the conveyor belt and its upper carrying material, and to ensure the stable operation of the conveyor belt. The idlers are divided into parallel idlers, trough idlers, centering idlers and buffer idlers.

 

2.1 Parallel idler structure

 

The structure of parallel idlers is shown in Figure 1. A group of rolling bearings are embedded in the inner holes at both ends of the roll body steel pipe, and the supporting roller axle passes through the whole parallel supporting roller. The two ends of the shaft extend beyond the steel pipe, and both sides of the shaft are provided with flat sides, which are fixed on the belt conveyor by hanging ears or brackets to support the conveyor belt. Rollers can be divided into two types according to their load-carrying capacity: normal type and heavy type. Each type of roller diameter corresponds to 2-3 axle diameters. All rollers adopt large clearance bearings, and ensure that the rotational speed of all rollers does not exceed 600 r/min.

 

2.2 Problems

 

If the material viscosity is high, the temperature is high or the cleaning effect of the sweeper is not good, the friction resistance of the parallel idler will increase and the wear will be serious, resulting in higher transportation cost. The seamless steel pipe with parallel idler often has uneven wall thickness. When the parallel idler made of this seamless steel pipe works, serious eccentricity will occur, which makes the parallel idler of belt conveyor produce abnormal noise and periodic vibration.

 

2.3 Improvement Method

 

Method 1: Improve the structure of the original parallel idler. The contact surface area between the cylinder wall and the conveyor belt of the parallel idler is reduced, and the roll body steel pipe of the parallel idler is changed into several sliding rings. Sliding rings and separators are arranged alternately, and are integrated by bolts. The inner holes of the sliding rings at both ends are also mounted with rolling bearings to support the idler shaft, and the idler shaft is also provided with a pin for the axial positioning of the idler. Slide rings are usually made of stainless steel. If used in less corrosive environments, ordinary carbon steel or nylon rods can also be used. The number of slip rings can be determined by the width of the belt conveyor. Shafts, blocks and screws can be made of carbon steel.

 

Method 2: The service life of parallel roller can be extended to a certain extent by evenly wrapping and sticking a layer of nylon cloth on the surface of the original parallel roller.