Mechanical caging device for on-off switch and interlocking mechanism for control cabinet door of high-voltage electric main control cabinet

Abstract

A mechanical lock device of the opening and closing switch of the high voltage electric major controlling cupboard and an interlocking mechanism of the branch controlling cupboard door belong to the technical field of the safety protection device for high voltage electrical devices. The invention comprises a first mechanical lock device arranged on the major controlling cupboard body, and a control box arranged on the major controlling cupboard body or the branch controlling cupboard, the control box is provided with a first control lock and a second control lock, the first key for the first control lock and the first mechanical lock device is the same, the first key is unique, the second key for the second control lock and the corresponding second mechanical lock device is the same, and the second key is also unique, the control box is provided with a box controlling key device. The invention has the advantages that the opening and closing switch of the major controlling cupboard are reliably locked in the opening or closing state, and that the reliable connection with the branch controlling cupboard door can be realized, and that the invention with simple structure is convenient to assemble and ensures safety without fault.

Description

technical field [0001] The invention belongs to the technical field of safety protection devices for high-voltage electrical equipment, and in particular relates to a mechanical locking device for an on-off switch of a high-voltage electrical main control cabinet and an interlock mechanism for a door of a sub-control cabinet. Background technique [0002] The opening and closing switch of the main control cabinet can be an isolating switch, a circuit breaker switch, or a load switch according to the specific configuration. The downstream electrical cabinet of the main control cabinet is usually called a sub-control cabinet. When there are more than one cabinet, it is customary to use Arabic numerals to sort them as cabinet No. 1 and No. 2, and so on. The doors of No. 1 and No. 2 cabinets are numbered as No. 1 cabinet door and No. 2 cabinet door, and so on. . When the opening and closing switch of the main control cabinet is in the closing state, it is absolutely not allowed...

AI Technical Summary

Problems solved by technology

In this way, when there is high voltage in the cabinet, the display lights up to remind people that there is electricity, and at the same time the electromagnetic lock is locked, and the cabinet door cannot be opened.

The disadvantage of this design is that the cost of the required components is high; holes for installing live displays and electromagnetic locks must be opened on the cabinet door, which is more destructive to the cabinet door; when the cabinet door is in an open state, due to the electromagnetic lock It does not work anymore, so it is necessary to install a travel switch or a component similar to a travel switch on the door to conduct electrical interlocking with the main control cabinet, that is, the upstream electrical switch, that is, the opening and closing switch. However, if the upstream electrical unit is not automatic When there is no secondary control system, it is impossible to realize the electrical interlock between the travel switch and the opening and closing switch of the main control cabinet, that is, when the cabinet door is opened, the opening and closing switch of the main control cabinet cannot be avoided by mistake, so that There is a high voltage in the sub-control cabinet with the door open, which is very dangerous

[0004] To sum up, since the current locking devices of the opening and closing switches of the main control cabinet are all embodied in non-mechanical structures, it is inevitable to reflect complicated wiring, cumbersome installation operations, poor reliability, and high failure rate , Can not fully eliminate potential safety hazards, especially when the opening and closing switch of the main control cabinet (upstream cabinet) is to be interlocked with more than one sub-control cabinet (downstream cabinet), the above-mentioned problems are more prominent

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