Hoisting-Rope Continuous Retracting and Releasing Device With Constant Locking Force and Small Impact

Abstract

Background: With the continuous exploitation of shallow mineral resources, the shallow resources are increasingly exhausted. Therefore, the application of multi-rope friction machine in ultradeep, high speed, heavy load mine will be more widely used. The diameter and dead weight of the hoisting-rope in this heavy-duty deep well are larger, and the internal torsion and bending load are more complex, which makes the replacement of the hoisting rope more difficult. According to the "coal mine safety regulations", the working life of the hoisting-rope is not more than two years, and the hoistingrope of friction hoist is not more than eight months in a harsh environment. Although the existing hoisting- rope replacing methods are mature, there are some problems, such as high labor intensity, long replacement time and low safety, which affect the mine production and are not suitable for deep mine hoisting-rope replacement operation. Objective: The purpose of this patent is to provide a new mechanism for safely and efficiently replacing the hoisting-ropes of multi-rope friction hoists. In addition, the dynamic simulation analysis of the key parameters of the mechanism is carried out, and reasonable design suggestions are given. Methods: A new device is designed to achieve continuous retracting and releasing ropes with constant locking force and small impact, which is mainly composed of sprocket, chain, friction block, mechanism of clamping hoisting-rope and so on. Results: The designed new mechanism can efficiently and safely replace the hoisting-rope of various hoisting equipment and realize the continuous hoisting-rope replacement, limiting the load impact to a great extent. The mechanism is responsible for clamping and releasing the new hoisting-rope and retracting the old hoisting-rope during the whole hoisting-rope replacement process. In the condition of some hoisting-rope with large dead weight, it can also provide enough clamping force, and there will be no phenomenon of hoisting-rope sliding. Conslusion: The device not only realizes the synchronous replacement of the old and new hoistingrope, but also greatly improves the replacement efficiency and safety of the hoisting-rope. The patent effectively solves the existing problems in the process of hoisting-rope replacement and greatly improves work efficiency.