Full-automatic velocity-limiting anti-falling device

Abstract

The invention relates to a full-automatic velocity-limiting anti-falling device. The full-automatic velocity-limiting anti-falling device is composed of a position velocity measuring device, an electric control device, a capturing braking device and a resetting device, a position velocity measuring sensor measures a position velocity signal and sends to a PLC controller, the PLC controller controls the electric device, a wedge-shaped slide block is shrank, a crank arm cam is driven to rotate by the shrinkage force of an extension spring, a cam rotates along with the crank arm cam to brake and rub a steel wire rope through gear transmission, and then the cage brake is realized. The full-automatic velocity-limiting anti-falling device is featured with convenience in mounting, high automatic degree, sensitive and reliable control and good brake performance.

Description

technical field [0001] The invention relates to a shaft safety device, in particular to a fully automatic speed-limiting anti-drop device for shaft hoisting. Background technique [0002] At present, in mine hoisting equipment, standard cages and anti-drop systems of more than 1 ton have been widely used in large and medium-sized coal mines in my country. However, in most township coal mines, due to the small shaft type, small shaft section, and financial problems, most of the vertical shaft hoisting containers are single-rope cages below 1 ton, and there is no national design standard for mine shaft hoisting cages with mine cars whose dead weight is below 1 ton The safety of small shaft hoisting cannot be guaranteed. In addition, most of the accidents of single-rope cages with ropes falling in mines are due to over-winding and over-discharging faults in the winch, and the hoisting wire rope is not disconnected, and the broken rope protection device does not work. At the s...

AI Technical Summary

Problems solved by technology

However, in most township coal mines, due to the small shaft type, small shaft section, and financial problems, most of the vertical shaft hoisting containers are single-rope cages below 1 ton, and there is no national design standard for mine shaft hoisting cages with mine cars whose dead weight is below 1 ton The safety of small shaft hoisting cannot be guaranteed

In addition, most of the accidents of single-rope cages and ropes falling tanks in mines are due to over-winding and over-discharging faults in the winch, and the hoisting wire rope is not disconnected, and the broken rope protection device does not work.

At the same time, during the lifting process of the cage, there will also be problems such as overspeed

Existing anti-dropping devices cannot effectively solve these above-mentioned technical problems

For example, the patent application 200920282072.4 discloses an anti-falling device for an overspeed sports car with a rope in a vertical shaft hoisting cage. The electromagnet is energized through PLC control, so that the spring tripping device trips and drives the cage braking device to brake. In this technical solution, The brake spring is directly connected to the hoisting wire rope through the connecting plate, and the spring is elastically vibrated when the cage accelerates up and decelerates down, which greatly reduces the service life of the spring; for example, patent application 201220244459.2 discloses a single-rope cage cage rope-broken sports car fall arrester , the energy storage type oil cylinder is provided with a return spring, one end of the return spring is matched with the lower end surface of the piston, and the other end is matched with the upper end surface of the inner wall of the energy storage type oil cylinder. Pull down the handle of the main pull rod, manual control will be delayed, and the degree of automation is low; for example, patent application 201110291041.7 discloses a speed-limiting fall arrester for vertical shaft single-rope hoisting. The rope clamp is connected to control the action of the rope clamp. In this technical solution, an electric push rod is used to control the action of the rope clamp, which has the disadvantages of poor safety performance, long braking time and poor braking effect.

The degree of automatic control of the speed limit anti-overwinding and over-discharging devices provided by the above patents is relatively low, which cannot meet the requirements of use. From the perspective of coal mine safety, fewer devices should be used as much as possible to achieve speed limit and over-release prevention at the same time. Volume, anti-over-discharge safety requirements

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