A Supplementary Electrical Control Method for Gantry Crane Safety Protection

Abstract

The invention discloses a supplementing electrical control method for safety protection of a gantry crane. A gantry crane alarm, a fence door electromagnetic lock, a first button switch, a second button switch, a circuit breaker, a cross-shaped limiting sensor, a first limiting switch, a second limiting switch, a wireless signal transmitter, a wireless signal receiver, an integrated controller, a first relay, a second relay, a third relay, a fourth relay and a passing alarm lamp are used in the supplementing electrical control method. All of the electrical components except the fence door electromagnetic lock and the wireless signal receiver are connected to a control circuit. Automatic alarming of the gantry crane alarm can be achieved, and constructors are prompted to pay attention to avoiding. When the gantry crane runs to the range within five meters of a vertical shaft, the fence door electromagnetic lock can be controlled to be locked, it is ensured that the constructors cannot enter a fence door, and favorable conditions are provided for construction safety. When the fence door is opened, it is shown that the constructors pass below the vertical shaft, the gantry crane is controlled to be forbidden to run towards the vertical shaft area, and the construction safety of the constructors is ensured.

Description

technical field [0001] The invention belongs to the technical field of gantry crane electrical control, and relates to a supplementary electrical control method for gantry crane safety protection. Background technique [0002] During the construction of tunnel shafts, gantry cranes often encounter the following problems: [0003] 1. When the gantry crane reaches the top of the shaft, in what way will the construction personnel in the shaft be reminded in time to give a warning; [0004] 2. When the gantry crane reaches the top of the shaft, although there are fence doors on both sides of the shaft, neither of the two fence doors has an automatic locking function, which may cause personal injury to construction workers who enter at will; [0005] 3. When the fence gate is open, what method is used to prevent the gantry crane from running to the top of the shaft. [0006] Because the gantry crane does not have an electrical control circuit to solve the above-mentioned proble...

AI Technical Summary

Problems solved by technology

[0004] 2. When the gantry crane reaches the top of the shaft, although there are fence doors on both sides of the shaft, neither of the two fence doors has an automatic locking function, which may cause personal injury to construction workers who enter at will;

[0006] Because the gantry crane does not have an electrical control circuit to solve the above problems in the existing safety protection circuit, the existing gantry crane cannot solve the above problems

[0007] Although some gantry cranes are equipped with simple alarms, the alarms can only be operated manually, which is far from meeting the requirements of tunnel construction and cannot solve the above three problems

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