The invention belongs to the technical field of coal mine, and particularly relates to a modification method for an auxiliary shaft safety door locking device. The using safety and reliability of a safety door are improved, operation procedures are simple, and operation is easy; eight hydraulic oil pipes with the diameter phi being 13 mm are omitted, and the lengths of the hydraulic oil pipes are 20 m and 10 m respectively; and the probability that pressures of hydraulic systems are mutually changed is reduced, and therefore the fault rate of a car handling system is decreased. The modification method comprises the following steps that firstly, a plug pin and a hydraulic pipeline of the safety door locking device are completely removed; secondly, sealed plugs with the diameter phi being 13 mm are used for blocking eight oil outlets of hydraulic stations on the ground and under a shaft; thirdly, a steel rod with the diameter phi being 20 mm is welded into a T-shaped plug pin, the two ends of the plug pin are each connected with a 1/3-decimeter steel pipe in series, the distance between the steel pipes is about 500 mm, and the plug pin is fixed to a 10mm-thickness steel plate with the proper area; and fourthly, the steel plate with the T-shaped plug pin is fixed to an auxiliary shaft derrick beam, and the height of the steel plate is the same as that of an original locking device, so that the movable T-shaped plug pin conveniently passes through a plug pin hole of an original locking device.
Modification method for auxiliary shaft safety door locking device
2015-11-04
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS |
European Patent Office | 2024
|European Patent Office | 2025
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