Rear door mechanical interlocking device for high-voltage metering cabinet

Abstract

The utility model provides a rear door mechanical interlocking device for a high-voltage metering cabinet. The rear door mechanical interlocking device comprises an interlocking rod, a spring, a support plate, a guide sleeve, a push plate and a rear door lock sheet, the rear door lock plate is fixed on a rear door of the metering cabinet, and the rear door lock plate is provided with a limiting hole for the interlocking rod to insert; the push plate is arranged on a rear door of the wire inlet cabinet, the guide sleeve is arranged between the wire inlet cabinet and the metering cabinet, one end of the interlocking rod passes through the guide sleeve and faces the push plate, and the other end of the interlocking rod passes through the support plate and faces the rear door lock sheet; the side face of the interlocking rod extends outwards in the radial direction to form a limiting column. The interlocking rod is sleeved with the spring which is located between the limiting column and the supporting plate. When the back door of the wire inlet cabinet is closed, the interlocking rod is driven by the push plate to move from the first position to the second position, and the spring is extruded to accumulate elastic reset force.

Description

TECHNICAL FIELD

[0001] The present application relates to electrical equipment, in particular to high voltage cabinet. BACKGROUND

[0002] High voltage cabinet needs five prevention interlocking to protect the safety of operators and equipment, the conventional incoming line and outgoing line cabinet has microcomputer comprehensive protection device, which can realize multifunctional electrical and mechanical interlocking protection and meet the five prevention requirements, while the metering cabinet has no microcomputer comprehensive protection device and can only use ordinary electromagnetic lock to realize electrical interlocking, which cannot well protect the safety of operators when electrical interlocking fails, and the increase of mechanical interlocking can realize better protection.

[0003] The five prevention of high voltage cabinet generally refers to five kinds of anti-misoperation functions for ensuring personal safety of high voltage electrical equipment, which is one of important measures for power safety. The five prevention is: preventing misoperation of disconnecting circuit breaker; preventing disconnecting isolating switch with load; preventing hanging (connecting) grounding wire (switch) with live wire; preventing connecting circuit breaker with grounding wire (switch); preventing entering live compartment. SUMMARY

[0004] The main technical problem to be solved by the present application is to provide a rear door mechanical interlocking device for high voltage metering cabinet, which can realize mechanical interlocking, completely prevent misentry into live compartment and protect the safety of operators.

[0005] In order to solve the above technical problems, the present application provides a rear door mechanical interlocking device for high voltage metering cabinet, which comprises an interlocking rod, a spring, a support plate, a guide sleeve, a push plate and a rear door lock piece.

[0006] The rear door lock piece is fixed on the rear door of the metering cabinet, and the rear door lock piece is provided with a limiting hole for inserting the interlocking rod;

[0007] The push plate is installed on the rear door of the incoming line cabinet, the guide sleeve is installed between the incoming line cabinet and the metering cabinet, one end of the interlocking rod passes through the guide sleeve and faces the push plate, the other end of the interlocking rod passes through the support plate and faces the rear door lock piece; the side surface of the interlocking rod extends outward along the radial direction and extends out a limiting column, and the spring is sleeved on the outside of the interlocking rod and located between the limiting column and the support plate;

[0008] When the rear door of the incoming line cabinet is closed, the push plate drives the interlocking rod to move from the first position to the second position and extrudes the spring to accumulate elastic return force.

[0009] In a preferred embodiment: when the rear door of the metering cabinet is in a closed state, and after the rear door of the incoming line cabinet is closed by the push plate to drive the interlocking rod to move from the first position to the second position, the interlocking rod is inserted into the limiting hole.

[0010] In a preferred embodiment: the rear door of the incoming line cabinet is in a closed state, and when the rear door of the metering cabinet moves to a closed position, the rear door locking piece interferes with the interlocking rod during the closing of the rear door of the metering cabinet.

[0011] In a preferred embodiment: the support plate is fixed on the fixed crossbeam of the metering cabinet.

[0012] In a preferred embodiment: the contact surface of the push plate and the interlocking rod comprises an inclined surface and a flat surface; during the closing of the rear door of the incoming line cabinet, the contact surface of the push plate and the interlocking rod is an inclined surface; after the closing of the rear door of the incoming line cabinet, the contact surface of the push plate and the interlocking rod is a flat surface.

[0013] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0014] The present application provides a rear door mechanical interlocking device for a high-voltage metering cabinet. When operating, the metering cabinet rear door needs to be closed first, and then the incoming line cabinet rear door needs to be closed. When closing the incoming line cabinet door, the push plate fixed on the door plate pushes the interlocking rod to move in the direction of the metering cabinet, and then inserts the locking piece of the metering cabinet rear door to lock, so that the metering cabinet rear door cannot be opened when the incoming line cabinet rear door is closed. If the operation sequence is not followed and the incoming line cabinet rear door is closed first, the interlocking rod is pushed out and blocks the locking piece, so that the metering cabinet rear door cannot be closed. In this way, it can be ensured that the user needs to close the metering cabinet rear door before closing the incoming line cabinet rear door. Since the incoming line cabinet needs to be opened without electricity, and the metering cabinet will not have electricity when the incoming line cabinet is without electricity, the mechanical interlocking method realizes the requirement of preventing personnel from mistakenly entering the live compartment of the metering cabinet. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The figure is a schematic diagram of the installation of the preferred embodiment of the present application;

[0016] Fig. 2 The figure is a schematic diagram of the interlocking device in the preferred embodiment of the present application;

[0017] Fig. 3 The figure is a schematic diagram of the installation of the interlocking device on the door plate in the preferred embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the technical scheme and characteristics of the present application clearer, the following further describes the present application in combination with the drawings and specific examples. It should be understood that these examples are only used to illustrate the present application and do not limit the scope of the present application. After reading the present application, those skilled in the art can make various equivalent modifications to the present application, which all fall within the scope defined by the claims of the present application.

[0019] REFERENCE Figs. 1-3The embodiment provides a rear door mechanical interlocking device for a high-voltage metering cabinet, which comprises an interlocking rod 1, a spring 2, a supporting plate 3, a guide sleeve 4, a push plate 5 and a rear door lock piece 6.

[0020] The rear door lock piece 6 is fixed to the rear door of the metering cabinet 7, and the rear door lock piece 6 is provided with a limiting hole 61 for inserting the interlocking rod 1; the push plate 5 is installed on the rear door of the incoming line cabinet 8, the guide sleeve 4 is installed between the incoming line cabinet 8 and the metering cabinet 7, one end of the interlocking rod 1 passes through the guide sleeve 4 and is directed to the push plate 5, and the other end of the interlocking rod 1 passes through the supporting plate 3 and is directed to the rear door lock piece 6; a limiting column 11 extends outward in a radial direction from the side of the interlocking rod 1, and the spring 2 is sleeved on the interlocking rod 1 and located between the limiting column 11 and the supporting plate 3.

[0021] When the rear door of the incoming line cabinet 8 is closed, the push plate 5 drives the interlocking rod 1 to move from the first position to the second position and extrudes the spring 2 to accumulate elastic return force.

[0022] When the rear door of the metering cabinet 7 is in a closed state, and the rear door of the incoming line cabinet 8 is closed by the push plate 5 to drive the interlocking rod 1 to move from the first position to the second position, the interlocking rod 1 is inserted into the limiting hole 61. In this way, the rear door of the incoming line cabinet 8 can be closed only after the rear door of the metering cabinet 7 is closed.

[0023] When the rear door of the incoming line cabinet 8 is in a closed state, and the rear door of the metering cabinet 7 is moved to a closing position, the rear door lock piece 6 interferes with the interlocking rod 1 during closing of the rear door of the metering cabinet 7. That is, if the rear door of the incoming line cabinet 8 is closed first, the rear door of the metering cabinet 7 cannot be normally closed. This avoids a safety accident caused by user misoperation.

[0024] The rear door mechanical interlocking device for the high-voltage metering cabinet needs to close the rear door of the metering cabinet 7 first and then close the rear door of the incoming line cabinet 8. When the rear door of the incoming line cabinet 8 is closed, the push plate 5 fixed on the door plate pushes the interlocking rod 1 to move to the metering cabinet 7 and then is inserted into the lock piece of the rear door of the metering cabinet 7 to be locked, so that the rear door of the metering cabinet 7 cannot be opened when the rear door of the incoming line cabinet 8 is closed. If the operation sequence is not followed and the rear door of the incoming line cabinet 8 is closed first, the interlocking rod 1 is pushed out and blocks the lock piece, so that the rear door of the metering cabinet 7 cannot be closed. In this way, it can be ensured that the rear door of the incoming line cabinet 8 can be closed only after the rear door of the metering cabinet 7 is closed. Since the incoming line cabinet 8 needs to be opened without electricity, the metering cabinet 7 also cannot have electricity. The mechanical interlocking mode realizes the requirement that the metering cabinet 7 prevents personnel from entering a live compartment by mistake.

[0025] In the embodiment, the support plate 3 is fixed on the fixed crossbeam 71 of the metering cabinet 7. The contact surface of the push plate 5 and the interlocking rod 1 comprises an inclined surface and a flat surface; during the process of closing the back door of the incoming line cabinet 8, the contact surface of the push plate 5 and the interlocking rod 1 is an inclined surface; after the back door of the incoming line cabinet 8 is closed, the contact surface of the push plate 5 and the interlocking rod 1 is a flat surface. Through the inclined surface, the purpose of gradually pushing out the interlocking rod 1 by the push plate 5 is achieved, and through the flat surface, the interlocking rod 1 can be kept stably at the current position and will not be loosened from the limiting hole 61.

[0026] The above is only one specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any non-substantial modification of the present application using this concept shall be deemed as an infringement of the protection scope of the present application.

Claims

1. A back door mechanical interlocking device for high pressure metering cabinet, characterized in that The interlocking rod, spring, support plate, guide sleeve, push plate and rear door lock piece are included. The rear door lock piece is fixed on the rear door of the metering cabinet, and the rear door lock piece is provided with a limiting hole for inserting the interlocking rod. The push plate is installed on the rear door of the incoming line cabinet, the guide sleeve is installed between the incoming line cabinet and the metering cabinet, one end of the interlocking rod passes through the guide sleeve and faces the push plate, the other end of the interlocking rod passes through the support plate and faces the rear door lock piece, the side surface of the interlocking rod extends outward along the radial direction and forms a limiting column, and the spring is sleeved outside the interlocking rod and located between the limiting column and the support plate. When the rear door of the incoming line cabinet is closed, the push plate drives the interlocking rod to move from the first position to the second position and extrudes the spring to accumulate elastic return force.

2. The mechanical interlocking device for the back door of a high-voltage metering cabinet according to claim 1, characterized in that: When the rear door of the metering cabinet is in the closed state, and after the rear door of the incoming line cabinet is closed and drives the interlocking rod to move from the first position to the second position, the interlocking rod is inserted into the limiting hole.

3. The mechanical interlocking device for the back door of a high voltage metering cubicle according to claim 1, characterized in that: When the rear door of the incoming line cabinet is in the closed state, and when the rear door of the metering cabinet moves to the closed position, the rear door lock piece interferes with the interlocking rod during the closing of the rear door of the metering cabinet.

4. The mechanical interlocking device for the back door of a high voltage metering cubicle according to claim 1, characterized in that: The support plate is fixed on the fixed cross beam of the metering cabinet.

5. The mechanical interlocking device for the back door of a high voltage metering cubicle according to claim 1, characterized in that: The contact surface of the push plate and the interlocking rod includes an inclined surface and a flat surface, the contact surface of the push plate and the interlocking rod is the inclined surface during the closing of the rear door of the incoming line cabinet, and the contact surface of the push plate and the interlocking rod is the flat surface after the rear door of the incoming line cabinet is closed.

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