A directional limiting device for a switch cabinet transfer switch

Abstract

The application relates to a directional limiting device for a switch cabinet transfer switch, which comprises a base arranged on a switch cabinet panel, a control lock body arranged on the base and a limiting assembly, a local / remote button is arranged on the switch cabinet panel and located in the base; the limiting assembly is rotationally connected with the base, and cooperates with the local / remote button to limit the rotation of the local / remote button; a positioning assembly is further arranged on one side of the control lock body, and cooperates with the control lock body to limit the extension of a plug tongue of the control lock body from the control lock body. The application has simple structure, when the local / remote button is rotated to a remote position, the key cannot be pulled out, so that the local / remote button is prevented from being forgotten to be rotated to a local position by a maintenance or local operator. The application belongs to the technical field of locks of switch cabinets.

Description

Technical Field

[0001] This invention relates to the field of lock technology for switchgear, and specifically to a directional limit device for a switchgear changeover switch. Background Technology

[0002] 10kV switchgear is widely used in 10kV distribution networks, 110kV and 220kV substations, and there are many manufacturers and types of 10kV switchgear. Existing 10kV switchgear is equipped with a "local / remote" knob. During maintenance or local operation, the knob is rotated to "local," and after completion, it is rotated to "remote." However, after maintenance or local operation, workers often forget to rotate the knob to the appropriate position, resulting in the switchgear being unable to perform remote control functions after maintenance or local operation. Summary of the Invention

[0003] In view of the technical problems existing in the prior art, the purpose of this invention is to provide a highly safe switchgear transfer switch directional limit device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A directional limiting device for a switchgear transfer switch includes a base mounted on the switchgear panel, a control lock body mounted on the base, and a limiting component. The switchgear panel has a local / remote button located inside the base. The limiting component is rotatably connected to the base and cooperates with the local / remote button to restrict its rotation. A positioning component is also provided on one side of the control lock body, which cooperates with the control lock body to restrict the tongue of the control lock body from extending out of the control lock body.

[0006] As a preferred embodiment, the limiting assembly includes a cover and a limiting baffle. The cover and the base are rotatably connected. The cover has a hollow structure. The limiting baffle is inclinedly disposed on the inner top of the cover. When the cover is closed on the base, the limiting baffle is located on one side of the local / remote button and pushes against the local / remote button.

[0007] As a preferred embodiment, one end of the cover is provided with a top block for engaging with the positioning component. When the cover is closed on the base, the bottom of the top block presses against the positioning component.

[0008] As a preferred embodiment, a connecting seat is provided on one side of the cover, a connecting shaft is inserted into the connecting seat, and a connecting ear is provided on the base, with both ends of the connecting shaft rotatably connected to the connecting ear respectively.

[0009] As an alternative, the cover is also provided with a first socket for the latch of the control lock body to be inserted into, and the cover is fixed to the base when the latch is inserted into the first socket.

[0010] As a preferred embodiment, the positioning component includes a connecting plate, and the connecting plate and the control lock body are slidably connected by an elastic element. The connecting plate is provided with a second socket for the latch of the control lock body to be inserted. When the cover is closed on the base, the bottom of the top block presses against the connecting plate, and the latch is inserted into the second socket.

[0011] As a preferred embodiment, the connecting plate includes a horizontal plate and a vertical plate, which are integrally formed and perpendicular to each other; the bottom of the horizontal plate is provided with two guide posts, and the control lock body is provided with a third insertion hole; the two guide posts are slidably connected to the third insertion hole through two elastic elements respectively; the second insertion hole is located on the vertical plate.

[0012] As a preferred option, the elastic element is a spring.

[0013] As a preferred embodiment, the top block is also provided with a slot, and the control lock body is also provided with a positioning protrusion for cooperating with the slot. When the cover is closed on the base, the positioning protrusion is inserted into the slot.

[0014] As a preferred option, the guide post has a cylindrical structure.

[0015] In summary, the present invention has the following advantages:

[0016] 1. This invention utilizes the cooperation of a limiting component, a positioning component, and a tongue to achieve the extension and retraction of the tongue, while the cooperation of a limiting baffle and local / remote buttons improves safety.

[0017] 2. The present invention has a simple structure. When the local / remote button is rotated to the "remote" position, the key cannot be removed, thereby preventing maintenance personnel or local operators from forgetting to rotate the "local / remote" button to the "local" position.

[0018] 3. In this invention, the cover can only be closed when the local / remote button is rotated to the "local" position. After closing, the top block of the cover will press down on the connecting plate and move it downward a certain distance, so that the second socket and the tongue are aligned. Then, turn the key so that the tongue passes through the second socket and the first socket in sequence, and then remove the key to complete the maintenance or local operation. Attached Figure Description

[0019] Figure 1 A perspective view of a switchgear directional limit device for a switch cabinet;

[0020] Figure 2 A perspective view of a switchgear directional limit device for a changeover switch with the limit component concealed.

[0021] Figure 3 A perspective view of a switch cabinet changeover switch directional limit device with a hidden cover;

[0022] Figure 4A schematic diagram of the structure when the positioning component is assembled into the control lock body;

[0023] Figure 5 A 3D view of the limiting component;

[0024] Figure 6 A 3D view of the lid;

[0025] Figure 7 A 3D view of the positioning components;

[0026] Among them, 1-base, 2-control lock body, 3-tongue, 4-limiting component, 5-positioning component; 6-local / remote button; 11-connecting ear; 21-positioning protrusion; 41-cover, 42-limiting baffle, 43-top block, 44-connecting seat, 45-first insertion hole, 46-slot; 51-connecting plate, 52-guide post, 53-spring, 54-second insertion hole. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments.

[0028] like Figure 1-3 As shown, a directional limiting device for a switchgear transfer switch includes a base mounted on the switchgear panel, a control lock body mounted on the base, and a limiting component. The switchgear panel has a local / remote button located within the base. The limiting component is rotatably connected to the base and cooperates with the local / remote button to restrict its rotation. A positioning component is also provided on one side of the control lock body, cooperating with the control lock body to restrict the tongue of the control lock body from extending out of the control lock body.

[0029] The limiting assembly includes a cover and a limiting baffle. The cover and the base are rotatably connected. The cover has a hollow structure. The limiting baffle is inclinedly set at the top of the inner side of the cover. When the cover is closed on the base, the limiting baffle is located on one side of the local / remote button and pushes against the local / remote button.

[0030] One end of the cover is provided with a top block for cooperating with the positioning component. When the cover is closed on the base, the bottom of the top block presses against the positioning component.

[0031] A connecting seat is provided on one side of the cover, and a connecting shaft is inserted into the connecting seat. The base is provided with a connecting ear, and the two ends of the connecting shaft are rotatably connected to the connecting ear respectively.

[0032] The cover is also provided with a first socket for the latch of the control lock body to be inserted. When the latch is inserted into the first socket, the cover is fixed to the base.

[0033] The positioning component includes a connecting plate, which is slidably connected to the control lock body via an elastic element. The connecting plate is provided with a second socket for the latch of the control lock body to be inserted. When the cover is closed on the base, the bottom of the top block presses against the connecting plate, and the latch is inserted into the second socket.

[0034] The connecting plate includes a horizontal plate and a vertical plate, which are integrally formed and perpendicular to each other; the bottom of the horizontal plate is provided with two guide posts, and the control lock body is provided with a third insertion hole. The two guide posts are slidably connected to the third insertion hole through two elastic elements respectively; the second insertion hole is located on the vertical plate.

[0035] The elastic element is a spring.

[0036] The top block also has a slot, and the control lock body is also provided with a positioning protrusion for cooperating with the slot. When the cover is closed on the base, the positioning protrusion is inserted into the slot.

[0037] The guide post has a cylindrical structure.

[0038] Working principle:

[0039] For maintenance or local operation, use the key to pull the latch out of the first and second sockets on the cover. Then open the cover and rotate the local / remote button to the "remote" position. At this point:

[0040] 1. The local / remote button is blocking the limit baffle of the cover, preventing the cover from closing completely;

[0041] 2. Under the action of the spring, the connecting plate moves upward a certain distance, causing the second mortise to no longer align with the latch. The latch cannot extend, preventing the key controlling the lock body from being removed.

[0042] After maintenance or local operation is completed, the local / remote switch needs to be rotated to the "local" position. At this time:

[0043] 1. Since the limit baffle no longer blocks the "local / remote" button, the cover can be fully closed;

[0044] 2. After the cover is closed, the top block at one end of the cover will press down on the connecting plate and move it downwards a certain distance, aligning the second socket with the tongue. Then turn the key to allow the tongue to pass through the second socket and the first socket in sequence, and then remove the key to complete the maintenance or on-site operation.

[0045] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A directional limit device for a switchgear changeover switch, characterized in that: The device includes a base mounted on the switch cabinet panel, a control lock body mounted on the base, and a limit assembly. The switch cabinet panel has a local / remote button located inside the base. The limit assembly is rotatably connected to the base and cooperates with the local / remote button to restrict its rotation. A positioning assembly is also provided on one side of the control lock body. The positioning assembly cooperates with the control lock body to restrict the tongue of the control lock body from extending out of the control lock body. The limiting assembly includes a cover and a limiting baffle. The cover and the base are rotatably connected. The cover has a hollow structure. The limiting baffle is inclinedly set at the top of the inner side of the cover. When the cover is closed on the base, the limiting baffle is located on one side of the local / remote button and pushes against the local / remote button. One end of the cover is provided with a top block for cooperating with the positioning component. When the cover is closed on the base, the bottom of the top block presses against the positioning component. A connecting seat is provided on one side of the cover, and a connecting shaft is inserted into the connecting seat. The base is provided with a connecting lug, and the two ends of the connecting shaft are rotatably connected to the connecting lug respectively. The cover is also provided with a first socket for the latch of the control lock body to be inserted. When the latch is inserted into the first socket, the cover is fixed to the base. The positioning component includes a connecting plate, and the connecting plate and the control lock body are slidably connected by an elastic element. The connecting plate is provided with a second socket for the tongue of the control lock body to be inserted. When the cover is closed on the base, the bottom of the top block presses against the connecting plate, and the tongue is inserted into the second socket. The connecting plate includes a horizontal plate and a vertical plate, which are integrally formed and perpendicular to each other; the bottom of the horizontal plate is provided with two guide posts, and the control lock body is provided with a third insertion hole. The two guide posts are slidably connected to the third insertion hole through two elastic elements respectively; the second insertion hole is located on the vertical plate.

2. The switchgear directional limit device according to claim 1, characterized in that: The elastic element is a spring.

3. The directional limiting device for a switchgear transfer switch according to claim 1, characterized in that: The top block also has a slot, and the control lock body is also provided with a positioning protrusion for cooperating with the slot. When the cover is closed on the base, the positioning protrusion is inserted into the slot.

4. A switchgear directional limit device according to claim 1, characterized in that: The guide post has a cylindrical structure.

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