Friction drive hoist cable brake and rope clamping device

Abstract

The invention relates to a device for sliding, braking and locking of steel wire rope in a friction drive hoist, which is suitable for the brake of the steel wire rope after the steel wire rope slides during the operation of the friction drive hoist, the brake of container drop caused by lack of brake force, or rope locking in the replacement of the steel wire rope. The device comprises a brake cylinder, a back push plate connected with the brake cylinder, a wedge-shaped brake block for rope locking, a roller chain which can ensure the up and down movement of the wedge-shaped brake block, a spacer pin which can limit and guide the wedge-shaped brake block, a restoring spring for the automatic resetting of the wedge-shaped brake block, a side pulling plate for guiding the brake device and a rope locking stop block for rope locking. When the machine can not be stopped due to rope sliding and lack of the brake force, a control system sends out brake signals, and the brake cylinder is controlled by a hydraulic system, thus leading a lifting steel wire rope which moves downwards of the brake device to be enclasped and braked; when the rope needs to be locked, a cylinder rod of the brake cylinder retracts to brake the steel wire rope, thus achieving the function of rope blocking. The device of the invention has simple structure, convenient operation and wide practicability.

Description

technical field [0001] The invention relates to a sliding rope braking and rope clamping device of a friction hoist, and is especially suitable for the safety anti-slip protection of a multi-rope friction hoist. Background technique [0002] The friction hoist may encounter unexpected factors such as overloading, freezing of the steel wire rope, and ordinary oil stains on the wire rope during use, so that the frictional traction of the friction hoist is smaller than the tension difference between the two sides of the hoist, resulting in that although the friction drum is braked, However, there was a safety accident that the steel wire rope slipped on the friction drum. In addition, due to the excessive brake shoe clearance in the braking system, the failure of the brake spring, the failure of the back pressure valve, the lack of braking force caused by the brake shoe or the brake disc being contaminated with oil, etc., the major safety accidents caused by the lifting contain...

AI Technical Summary

Problems solved by technology

[0002] The friction hoist may encounter unexpected factors such as overloading, freezing of the steel wire rope, and ordinary oil stains on the wire rope during use, so that the frictional traction of the friction hoist is smaller than the tension difference between the two sides of the hoist, resulting in that although the friction drum is braked, However, the safety accident that the steel wire rope slipped on the friction roller

In addition, due to the excessive brake shoe clearance in the braking system, the failure of the brake spring, the failure of the back pressure valve, the lack of braking force caused by the brake shoe or the brake disc being contaminated with oil, etc., the major safety accidents caused by the lifting container falling , such as the skip bucket accident in Xuzhou Quantai Mine in 1992, the tank accident in Zhangji Mine in Xuzhou in 1998, the sliding rope accident in Xuandong Mine in Hebei in 2001, and the bucket accident in Changping Mine in Jincheng in September 2005 , In September 2006, the skip bucket accident in Chengzihe Mine, Jixi, etc., each accident caused direct and indirect losses of tens of millions of yuan, and there is currently no brake device that can effectively solve these problems on the market

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