Constant decelerating braking conversion device

Abstract

The invention relates to a constant decelerating braking conversion device which comprises a PLC (Programmable Logic Controller), a detecting protector, a speed detector and a hydraulic control system, wherein the hydraulic control system mainly comprises a reversing valve G1, a reversing valve G2, an energy accumulator, a relief valve and an electro-hydraulic proportional valve; the reversing valve G1 is connected with a pipeline A and a pipeline B which are communicated to a disc brake; a stop valve is connected before a tapping point of two branch circuits before one-way valve; and the constant decelerating braking conversion device takes the PLC (Programmable Logic Controller) as the core and is provided with a corresponding control and amplifying circuit with the addition of a UPS (Uninterrupted Power Supply) back-up source. The constant decelerating braking is realized on the basis of the original working braking and constant moment braking. A constant decelerating braking loop is closed when a hoister is subjected to normal working braking; the constant decelerating braking is started in emergency situations; when the constant decelerating braking becomes invalid, the constant moment secondary braking can be immediately started, thereby the braking performance is increased and the reliability and the stability of the safety braking of the system are ensured. The constant decelerating braking conversion device has the advantages of simple structure, low cost, high reliability and convenience in maintenance.

Description

technical field [0001] The invention relates to a conversion device, in particular to a constant deceleration braking conversion device suitable for emergency braking of a hoist failure. Background technique [0002] The brake system of the hoist is an important safety protection device of the hoist. It is the last resort for the hoist to decelerate to a stop in an emergency, and it is directly related to mine production and personnel safety. The main functions are: to reliably brake the hoist at the end of lifting; as a safety mechanism, to perform safety braking in case of emergency. At present, there are mainly two safety braking methods: (1) Constant torque braking: first lock a part of the disc brakes to decelerate the hoist, and then apply another part of the disc brakes when the speed is reduced to zero; (2) Constant deceleration system Dynamic: With constant deceleration as the control target, through continuous adjustment of the braking torque, the hoist can brake ...

AI Technical Summary

Problems solved by technology

At present, the constant deceleration brake developed and manufactured by CITIC Heavy Industries is mainly used in China. Since most of the hydraulic components are imported, it is necessary to replace the entire lifting system to achieve constant deceleration braking, which is expensive.

Therefore, the domestic use of constant deceleration braking system is less than 5%, and there is still a certain gap compared with similar foreign products

However, its system is complex, more expensive, and spare parts are difficult, and it is also necessary to replace the entire lifting system to achieve constant deceleration braking, which costs more

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