News and Information

26

2020-05

Operation and Maintenance of Conveyor Belts in Production Lines

Conveyor systems, with their simple structure, ease of operation, and strong transport capacity, are widely used across various industries. In industrial production, proper care and maintenance of conveyor belts can extend the service life of the system, thereby effectively reducing production costs. First, as conveyor systems become increasingly prevalent in industrial manufacturing, manufacturers are focusing on several key attributes: product variety, high performance, lightweight design, multifunctionality, and long service life. When using conveyor belts, the following points should be observed: 1. Avoid allowing material to cover the idlers, which can cause sluggish rotation; prevent material from leaking and becoming jammed between the rollers and the belt; and ensure adequate lubrication of the moving parts of the conveyor belt.

26

2020-05

The primary characteristic of sugar-processing equipment and mining hydraulic supports is the core technology of sugar-processing equipment.

The sugar-processing equipment single hydraulic prop is a single, retractable support that generates working resistance through fluid pressure to achieve lifting and unloading. First, it features a large working stroke and low safety-management costs: each specification can replace 2–4 conventional piston-type single props, thereby reducing the frequency with which different models of single props must be swapped due to variations in mining height at the working face and in the amount of roof and floor movement in the roadway. This, in turn, lowers workers’ physical workload and reduces the need to keep extra spare props on hand. Second, it offers high support strength and excellent safety and stability: the prop has no load-bearing welds, and it employs a floating-technology principle, whereby the buoyant force generated by high-pressure fluid acts directly on the top-cap end, achieving one-fifth of the required working resistance.

26

2020-05

Classification of Conveyor Belt Splices

All conveyors must be connected in a closed loop before operation; therefore, the quality of conveyor belt splices directly affects belt durability and the smooth operation of the conveying process. There are three common methods for making conveyor belt splices: mechanical splicing, cold-bonding splicing, and hot-vulcanization splicing. Mechanical splicing generally refers to the use of splice plates to join conveyor belts. This method is convenient and cost-effective, but it has low splice efficiency, is prone to damage, and can shorten the service life of the belt. PVC and PVG flame-retardant and antistatic conveyor belts typically employ splices that fall within the lower eight grades of standard splicing methods. Cold-bonding splicing involves using a cold-bonding adhesive to join the belt. Compared with mechanically spliced joints made using vulcanizing rollers, this method is more efficient and economical and generally yields better splice performance; however, in practice, because the process conditions are difficult to control and the quality of the bonding compound has a significant impact, the splice quality can be less stable. Hot-vulcanization splicing has been proven in practice to be an ideal joining method, as it ensures high splice efficiency, stable performance, long service life, and ease of operation. Nevertheless, it suffers from drawbacks such as a complicated process, high costs, and lengthy connection times.

26

2020-05

Common Materials Used in Belt Conveyors

The commonly used material for belt conveyors is glass-fiber-reinforced polymer (GRP). GRP is short for glass-fiber-reinforced composite material. Composite materials are composed of two or more constituent materials with distinct chemical or physical properties. Composites are classified as particle-reinforced or fiber-reinforced. In the case of GRP, the matrix is a resin, and the reinforcement is glass fiber; GRP can be further divided into continuous-fiber and discontinuous-fiber types. Continuous-fiber GRP includes laminated structures, filament-wound structures, and multidirectional woven structures, while discontinuous-fiber GRP is typically produced by compression molding. There are numerous processes for shaping GRP; in China, hand lay-up, compression molding, and filament winding are widely employed, whereas pultrusion is rapidly developing, with spray and spray-injection processes also being frequently used. The resin serves

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