The ancient Chinese high-rotating drum cars and water-lifting dump trucks were the prototypes of modern bucket elevators and scraper conveyors; in the mid-17th century, overhead cableways began to be used to transport bulk materials; in the mid-19th century, various modern structures for transportation Machines appeared one after another.
In 1868, belt conveyors appeared in the United Kingdom; in 1887, screw conveyors appeared in the United States; in 1905, steel belt conveyors appeared in Switzerland; in 1906, inertial conveyors appeared in the United Kingdom and Germany. Since then, conveyors have been continuously improved due to technological advances in machinery manufacturing, motors, chemical and metallurgical industries, and have gradually evolved from completing transportation within workshops to completing material handling within enterprises, between enterprises and even between cities, becoming a material An indispensable component of mechanization and automation of handling systems.
A belt conveyor is a friction-driven machine that transports materials in a continuous manner. It is mainly composed of frames, conveyor belts, idlers, rollers, tensioning devices, transmission devices, etc. It can form a material conveying process on a certain conveyor line, from the initial feeding point to the final discharging point. It can not only carry out the conveying of broken bulk materials, but also the conveying of finished items. In addition to pure material transportation, it can also cooperate with the requirements of the process in the production process of various industrial enterprises to form a rhythmic assembly line transportation line.
Belt conveyor, also known as belt conveyor, the conveyor belt moves according to the principle of friction transmission, and is suitable for conveying easy-to-extract powdery, granular, small block low-abrasive materials and bagged materials, such as coal, gravel, sand, cement, fertilizer, grain, etc. The belt conveyor can be used in the ambient temperature range of -20°C to +40°C, and the temperature of the material to be fed is less than 60°C. Its length and assembly form can be determined according to user requirements, and the transmission can be made with an electric roller, or a drive device with a driving frame.
1. Working environment, condition and conditions
It is necessary to consider the time of operation per day, the frequency of work, the service life of the belt conveyor, and the method of feeding and discharging.
Working environment, condition: ambient temperature, open air or indoor, environmental protection requirements, mobile or fixed, telescopic requirements.
2. Problems with conveyor lines and conveyor belts
It is necessary to consider the size of the conveyor line in detail, including: inclination, maximum length, lifting height; the size of straight and curved segments; connection size, etc.
Conveyor belts: maximum sag requirements, simulated friction resistance coefficient, friction coefficient, safety factor.
3. The nature of the material and the amount of conveying
The specific properties of the material need to be considered, including: loose density, resting angle, particle size of the material, maximum lumpiness, humidity of the material, abrasion, cohesion and coefficient of friction. Conveying volume, the conveying amount that can be directly achieved when the material flow is uniform, and the basic statistical data of the material flow can be considered when the material flow is uneven.
