Mine rockfall braking rope friction plate drum damper

Abstract

The invention aims at providing a mine rockfall braking rope friction plate drum damper, relating to the mine safety device technical field. Two snub ropes are fixed on a drum and symmetrically wound, the other ends of the two snub ropes are merged and connected with a connector or braking rope, the drum is in running fit with a spindle by a connecting piece on the drum and a bearing, the cavity of the drum is fixed with an outside friction disc which can slide axially along the drum, the spindle is fixed with an internal friction plate which can slide axially, the two friction plates are staggered each other in axial direction, and a pressure spring and a pressure adjusting structure and a snub rope pull-out preventing structure are arranged. The invention can solves the problems that braking force of steel rope spiral damper is uncertain and the braking force is difficult to be marked accurately when in use. The invention has the characteristics of reliable braking, stable braking force, convenient braking force adjustment, longer braking distance, good safety, convenient snub rope regulation, convenient braking force test and convenient tensioning of braking rope.

Description

technical field [0001] The invention relates to the technical field of mine safety devices. Background technique [0002] At present, in mine single-rope hoisting systems, the catch-type fall arrester installed on the lifting container is generally used to prevent the accident of breaking the rope and falling into the tank. brake rope), the lifting container is braked on the brake rope to prevent the lifting container from falling. When the lifting container runs downwards and the tank falls, due to the existing speed of the lifting container and the gravitational acceleration during the empty travel time of the arresting mechanism, the instantaneous speed of the lifting container will be high when the fall arrester catches it, and the impact force will be great In order to prevent personal injury accidents caused by excessive braking deceleration of the falling lifting container, after the arresting mechanism catches the lifting container, buffer braking must be performed ...

AI Technical Summary

Problems solved by technology

Due to the harsh working conditions of the mine, the brake wire rope is damaged due to debugging, corrosion, and aging of anti-rust materials, etc., which directly affect the deformation resistance of the brake wire rope when it is drawn, and the steel rope helical buffer has the problem of uncertain braking force.

In use, the buffering performance of the steel rope helical buffer is judged according to the length of the test buffer rope pulled out. However, after the test, the buffer rope needs to be restored and the pressure needs to be readjusted. The value is still uncertain, and it is difficult to accurately calibrate the braking force in use

In practice, the length of the steel rope helical buffers used in many mines is relatively small after the on-site anti-drop test, and there is a problem that the braking force of the buffer is too large. If a rope breakage accident occurs, it may be caused by excessive deceleration damage to personal health

my country's AQ2019-2008 "Specifications for Testing and Inspection of Safety Performance of Anti-falling Devices in Shaft Hoisting Systems of Metal and Non-metallic Mine" implemented on January 1, 2009 in China stipulates specific technical index requirements for the deceleration during the braking process of anti-falling devices. To make the braking force of the buffer meet the technical index requirements stipulated in the safety regulations, and to protect personal safety and health, it is necessary to solve the problem of uncertain buffer braking force and the difficulty of accurate calibration in the field of use existing in the prior art

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