De-energized interlock for maintenance

Abstract

The utility model discloses a kind of outage interlocking devices for overhauling and maintenance, comprising: bolt, fixed on the cabinet body of electric appliance cabinet Pin nose and with the detachable connection main door cover of cabinet body, main door cover is equipped with the hand hole of the maintenance switch of electric appliance cabinet relative setting;Bolt includes pin, bolt seat fixed on main door cover and handle fixed at one end of pin;Pin can slide along the length direction of itself relative bolt seat, so that pin can be inserted with Pin nose or separate;Handle can be blocked by maintenance switch, when handle is blocked by maintenance switch, pin cannot separate Pin nose. By making the handle of bolt can be blocked by the maintenance switch of electric appliance cabinet, so that when there is maintenance switch not pulled out, pin cannot separate Pin nose, to prevent the opening of main door cover. Ensure that electric appliance cabinet can only be opened cabinet operation in the case of complete power failure, effectively avoid the risk of electric shock, guarantee the personal safety of overhauling and maintenance personnel.

Description

Technical Field

[0001] This utility model relates to the field of electrical cabinet technology, and in particular to a power-off interlock device for inspection and maintenance. Background Technology

[0002] When electrical products require inspection and maintenance, to ensure safety, the maintenance switch of the electrical cabinet must be disconnected first to completely de-energize the cabinet before any work can be carried out. If maintenance personnel make an operational error and fail to fully disconnect the maintenance switch, opening the cabinet before it is completely de-energized could result in electric shock, threatening their personal safety. Summary of the Invention

[0003] This utility model provides a power-off interlock device for inspection and maintenance to overcome the above-mentioned problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A power-off interlock device for inspection and maintenance includes: a latch, a pin lug fixed to the cabinet body of an electrical cabinet, and a main door cover detachably connected to the cabinet body. The main door cover is provided with a hand hole opposite to the maintenance switch of the electrical cabinet.

[0006] The latch includes a pin, a latch seat fixed on the main door cover, and a handle fixed to one end of the pin;

[0007] The pin can slide relative to the pin seat along its own length, so that the pin can be engaged or disengaged from the pin nose;

[0008] The handle can be blocked by the maintenance switch, and when the handle is blocked by the maintenance switch, the pin cannot disengage from the pin lug.

[0009] Furthermore, it also includes a protective cover that is detachably connected to the main door cover, the protective cover being able to cover the hand hole.

[0010] Furthermore, the main door cover is connected to the cabinet body via a power distribution cabinet door lock.

[0011] Furthermore, the protective door cover is connected to the main door cover via a power distribution cabinet door lock.

[0012] Furthermore, the main door cover is equipped with a handle.

[0013] Furthermore, it also includes a limiting post fixed on the main door cover, the pin having an elongated hole extending along its own length, and the limiting post being placed inside the elongated hole.

[0014] Furthermore, a connecting plate is fixedly provided on the handle, and the connecting plate is connected to the pin seat by screws.

[0015] Beneficial Effects: This utility model provides a power-off interlock device for maintenance and repair. It features a pin on the main door cover that engages with a latch on the electrical cabinet body, and the handle of the pin is designed to be blocked by the maintenance switch of the electrical cabinet. Thus, if the maintenance switch is not removed, the pin cannot disengage from the latch, preventing the main door cover from opening. This ensures that the electrical cabinet can only be opened when the power is completely off, effectively avoiding the risk of electric shock and protecting the personal safety of maintenance personnel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a power-off interlock device for inspection and maintenance installed on a cabinet, as disclosed in this utility model.

[0018] Figure 2 This is a front view schematic diagram of a power-off interlock device for inspection and maintenance disclosed in this utility model;

[0019] Figure 3 This is a rear view schematic diagram of a power-off interlock device for removing pins disclosed in this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A;

[0021] Figure 5 This utility model discloses a schematic diagram showing the positions of a power-off interlock device and a maintenance switch for inspection and maintenance. Figure 1 ;

[0022] Figure 6 This utility model discloses a schematic diagram showing the positions of a power-off interlock device and a maintenance switch for inspection and maintenance. Figure 2 ;

[0023] Figure 7 This utility model discloses a schematic diagram showing the positions of a power-off interlock device and a maintenance switch for inspection and maintenance. Figure 3 .

[0024] In the picture:

[0025] 1. Pin; 11. Pin rod; 12. Pin holder; 13. Handle; 14. Long hole;

[0026] 2. Shaving the nose;

[0027] 3. Main door cover; 31. Handhole;

[0028] 4. Protective door cover;

[0029] 5. Distribution cabinet door lock;

[0030] 6. Handle;

[0031] 7. Limiting post;

[0032] 8. Cabinet;

[0033] 9. Maintenance switch. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] This embodiment provides a power-off interlock device for inspection and maintenance, such as... Figures 1 to 7 As shown, it includes: a latch 1, a pin lug 2 welded and fixed to the cabinet body 8 of the electrical cabinet, and a main door cover 3 detachably connected to the cabinet body 8, as shown. Figure 5 As shown, the main door cover 3 is provided with a handhole 31 that is opposite to the maintenance switch 9 of the electrical cabinet;

[0036] like Figure 4 As shown, the latch 1 includes a pin 11, a latch seat 12 welded and fixed to the main door cover 3, and a handle 13 welded and fixed to one end of the pin 11;

[0037] The pin 11 can slide relative to the pin seat 12 along its own length direction (the pin seat 12 is provided with a through hole that allows the pin 11 to pass through), so that the pin 11 can be inserted into or disengaged from the pin lug 2.

[0038] like Figures 5 to 7 As shown, the handle 13 can be blocked by the maintenance switch 9. When the handle 13 is blocked by the maintenance switch 9, the pin 11 cannot disengage from the pin lug 2.

[0039] This embodiment provides a power-off interlock device for maintenance and repair. A latch 1 is installed on the main door cover 3, which engages with the latch lug 2 on the electrical cabinet body 8. The handle 13 of the latch 1 is designed to be blocked by the maintenance switch 9 of the electrical cabinet. Thus, when the maintenance switch 9 is not removed, the latch 11 cannot disengage from the latch lug 2, thereby preventing the main door cover 3 from opening. This ensures that the electrical cabinet can only be opened when the power is completely off, effectively avoiding the risk of electric shock and protecting the personal safety of maintenance personnel.

[0040] Specifically, such as Figure 2 and Figure 3 As shown, it also includes a protective door cover 4 that is detachably connected to the main door cover 3, and the protective door cover 4 can cover the hand hole 31.

[0041] Specifically, such as Figure 1 and Figure 2 As shown, the main door cover 3 is detachably connected to the cabinet body 8 via the power distribution cabinet door lock 5, and the protective door cover 4 is detachably connected to the main door cover 3 via the power distribution cabinet door lock 5.

[0042] Preferably, such as Figure 2 As shown, the main door cover 3 is provided with a handle 6, which facilitates the disassembly and assembly of the main door cover 3 by maintenance personnel.

[0043] Preferably, such as Figure 4 As shown, it also includes a limiting post 7 fixed on the main door cover 3. The pin 11 is provided with an elongated hole 14 extending along its own length direction. The limiting post 7 is placed in the elongated hole 14 to prevent the pin 11 from separating from the main door cover 3. In this embodiment, for ease of installation, the limiting post 7 is a bolt screwed onto the main door cover 3.

[0044] Preferably, a connecting plate is fixed on the handle 13, and the connecting plate is connected to the plug seat 12 by screws. In this embodiment, the connecting plate is provided with a connecting hole, and the screw in the connecting hole is connected to the nut welded on the plug seat 12. Tightening the screw fixes the handle 13 to the plug seat 12, preventing the plug 1 from repeatedly hitting the maintenance switch 9 due to the shaking of the electrical cabinet.

[0045] In actual operation, maintenance personnel unscrew the distribution cabinet door lock 5 on the protective door cover 4, remove the protective door cover 4, pull out the maintenance switch 9 from the hand hole 31, the electrical cabinet is de-energized, unscrew the screws in the connection hole, at this time the plug 1 can be pulled so that the pin 11 can be disengaged from the pin nose 2, unscrew the distribution cabinet door lock 5 on the main door cover 3, and the main door cover 3 can be removed to carry out maintenance work inside the cabinet;

[0046] When a reset is required, turn the distribution cabinet door lock 5 on the main door cover 3 to install the main door cover 3, push in the pin 1 so that the pin rod 11 can be inserted with the pin nose 2. At this time, the maintenance switch 9 can be installed on the electrical cabinet without being blocked by the handle 13, ensuring that it can be energized only in an isolated and protected state.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A power-off interlock device for inspection and maintenance, characterized in that, include: The main door cover (3) is detachably connected to the cabinet body (8) of the electrical cabinet (1), the pin (2) is fixed on the cabinet body (8), and the main door cover (3) is provided with a hand hole (31) opposite to the maintenance switch (9) of the electrical cabinet. The latch (1) includes a pin (11), a latch seat (12) fixed on the main door cover (3), and a handle (13) fixed to one end of the pin (11); The pin (11) can slide relative to the pin seat (12) along its own length direction, so that the pin (11) can be engaged or disengaged from the pin nose (2); The handle (13) can be blocked by the maintenance switch (9). When the handle (13) is blocked by the maintenance switch (9), the pin (11) cannot disengage from the pin lug (2).

2. The power-off interlock device for maintenance and repair according to claim 1, characterized in that, It also includes a protective cover (4) that is detachably connected to the main cover (3), the protective cover (4) being able to cover the handhole (31).

3. The power-off interlock device for inspection and maintenance according to claim 1, characterized in that, The main door cover (3) is connected to the cabinet body (8) through the power distribution cabinet door lock (5).

4. The power-off interlock device for inspection and maintenance according to claim 2, characterized in that, The protective door cover (4) is connected to the main door cover (3) via the power distribution cabinet door lock (5).

5. A power-off interlock device for inspection and maintenance according to claim 1, characterized in that, The main door cover (3) is provided with a handle (6).

6. The power-off interlock device for inspection and maintenance according to claim 1, characterized in that, It also includes a limiting post (7) fixed on the main door cover (3), and the pin (11) is provided with an elongated hole (14) extending along its own length direction, and the limiting post (7) is placed in the elongated hole (14).

7. The power-off interlock device for inspection and maintenance according to claim 1, characterized in that, A connecting plate is fixed on the handle (13), and the connecting plate is connected to the pin seat (12) by screws.

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