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The development history of scraper conveyor

by:YiFan Conveyor     2021-08-24
With the continuous increase of coal mining face production capacity, the main development trends of scraper conveyors are: 1. Large transportation volume. Foreign advanced coal mining countries have developed scraper conveyors with an hourly transportation capacity of up to 1500t (in the 1980s) and 3500t (in the 1990s). 2. Long transportation distance. In order to reduce the loss of coal pillars in the mining area and increase the length of the working face, the length of the scraper conveyor has reached more than 335 meters. 3. High-power motor. The power of the motor has been developed to 525kW for single-speed motors and 500/250kW for two-speed motors. 4. Long life. Due to the use of large-diameter circular chain, the strength of the scraper chain is increased, and the life of the scraper conveyor is prolonged. The coal throughput of the whole machine is as high as 6 million tons. The development of the scraper conveyor in the production and construction of coal mines has roughly gone through three stages. The first stage was the detachable scraper conveyor in the 1930s and 1940s. It could only be laid straight in the working surface. As the working surface progressed, it had to be manually disassembled, moved, and assembled. The scraper chain is a plate type, mostly single chain, such as V type, SGD-11 type, SGD-20 type and other small power light scraper conveyors. The second stage was the manufacture of a flexible scraper loading conveyor in Germany in the early 1940s. It cooperated with the shearer and metal support to realize mechanized coal mining. This kind of scraper loading conveyor cough adapts to conditions such as uneven floor, unevenness, unevenness, and horizontal bending. It does not need to be disassembled when moving, and the amount of coal has also increased. For example, the model SGW-44 scraper conveyor at the time was at this stage. The representative product. In the 1960s, due to the emergence of hydraulic supports, in order to meet the needs of fully mechanized mining, the scraper conveyor developed to the third stage, and high-power armored cough curved heavy scraper conveyors were developed, such as SGD-630/75, SGD- Type 630/180, etc. are products at this stage.
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