Online monitoring system design of multi-rope friction hoist load

Mine hoist is responsible for important tasks such as upgrading coal and gangue, lowering materials, lifting personnel and equipment. With increasing of mine depth and lifting capacity, multi-rope friction hoist becomes a key lifting equipment in major coal mines of China due to its advantages of small size, low weight, great lifting capacity, safe performance, suitable for deep well, etc.. As a large-scale mechanical electronic equipment in mining industry, mine hoist is one of the four large equipments for coal mining, known as ¿throat of mine¿. The safe operation of mine hoist has a direct influence on the safety of mine production: hoist overload occurs occasionally as a result of the lack of detection measures, which greatly threatens safety of production. The design realizes the diagnosis and alarm of faults such as overload, unloading of coal transfinite, pot-sticking and imbalanced tension, and disconnect the security loop when necessary thus to avoid incidents.