Low-voltage cabinet internal isolation device

Abstract

The utility model discloses a kind of low-voltage cabinet internal isolation devices, belong to low-voltage cabinet technical field, including cabinet body and the isolation device of being installed in the front end inside cabinet body, the isolation device includes vertically arranged mounting frame, the both sides side wall of mounting frame is equipped with sliding slot, several sliding blocks are slidably connected in two sliding slots, relative two sliding blocks are fixedly connected with rebound mechanism, relative two rebound mechanisms are fixedly connected with isolation plate between, the both sides inner wall of mounting frame is fixedly connected with interlocking mechanism for the limiting of isolation plate. In the utility model, by setting interlocking mechanism, only the electrical components in the cabinet body are powered off, interlocking mechanism will lose the locking of isolation plate, so that isolation plate can be moved for maintenance, prevent misoperation, improve safety, and set transparent acrylic material isolation plate, insulation and convenient to observe, facilitate subsequent maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage switchgear technology, specifically a low-voltage switchgear internal isolation device. Background Technology

[0002] With the continuous progress of society and the continuous development of science, people are using more and more electrical appliances in their daily lives. In order to maintain the stability of power, cabinets are set up to protect the internal circuits and components. Low-voltage distribution cabinets are mainly used for power conversion and control in lighting and power distribution. Moreover, low-voltage distribution cabinets have the characteristics of strong breaking capacity, good dynamic and thermal stability, flexible electrical schemes, convenient combination, series, strong practicality, and novel structure.

[0003] In a Chinese patent for a low-voltage distribution cabinet with internal isolation and protection (patent number: CN219106748U), the device includes a low-voltage distribution cabinet, an isolation and protection device fixedly installed inside the low-voltage distribution cabinet, limit tooth plates symmetrically fixedly installed on both sides of the inside of the low-voltage distribution cabinet, a limit guide rod fixedly installed inside the low-voltage distribution cabinet and on one edge of the limit tooth plates, a maintenance frame fixedly installed inside the isolation and protection device, plastic isolation layers fixedly connected to both the upper and lower surfaces of the maintenance frame, and a positioning rod fixedly connected to the top of the plastic isolation layers. The bottom of the delamination layer is fixedly connected to a connecting crossbar. This device can prevent wires and electrical components from being completely exposed by installing an isolation and protection device inside the side of the low-voltage distribution cabinet. At the same time, it can isolate the parts inside the low-voltage distribution cabinet that are not under maintenance, thereby preventing accidental electric shock accidents. However, the device initially completely encloses the electrical equipment and lines inside the low-voltage cabinet, making it inconvenient for maintenance personnel to observe the inside of the low-voltage cabinet. Moreover, it lacks a mechanical interlocking mechanism, which makes it easy to operate it by mistake without disconnecting the power, thus posing a safety hazard. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides the following technical solution: an internal isolation device for a low-voltage cabinet, comprising a cabinet body and an isolation device installed at the front end inside the cabinet body. The isolation device includes a vertically arranged mounting frame, with sliding grooves on both side walls of the mounting frame. Several sliders are slidably connected in the two sliding grooves, and a spring-loaded mechanism is fixedly connected to two opposing sliders. An isolation plate is fixedly connected between two opposing spring-loaded mechanisms. An interlocking mechanism for limiting the isolation plate is fixedly connected to both inner walls of the mounting frame.

[0005] The interlocking mechanism includes a housing fixed to the inner wall of the vertical section of the mounting frame. A partition plate is fixedly connected to the inner wall of the housing. A horizontally arranged slide rod is inserted into and slidably connected to the side wall of the partition plate. A tension spring is fixedly connected between one end of the slide rod and the inner wall of the housing. An iron block is fixedly connected to the end of the slide rod away from the tension spring. An electromagnetic block corresponding to the iron block is fixedly connected to the inner wall of the end of the housing away from the tension spring. Two symmetrically arranged L-shaped limiting rods are fixedly connected to both ends of the iron block. Slots are opened on the upper and lower side walls of the housing. The two L-shaped limiting rods pass through the two slots and extend to the upper and lower sides of the partition plate, respectively.

[0006] As a further embodiment of this utility model: the rebound mechanism includes a hollow block fixedly connected to the slider, a sliding plate slidably connected to the inner wall of the hollow block, a pull rod fixedly connected to one side of the sliding plate, a compression spring fixedly connected between the sliding plate and the inner wall of the hollow block, one end of the pull rod penetrating the front side wall of the hollow block and fixedly connected to a connecting block, and the connecting block fixedly connected to one end of the isolation plate.

[0007] As a further embodiment of this utility model, the electromagnetic block is electrically connected to the main power supply terminal of the circuit breaker gas inside the low-voltage cabinet via a wire.

[0008] As a further embodiment of this utility model: the side wall of the partition plate is provided with a sliding hole, and the sliding rod passes through the sliding hole and is slidably connected to it.

[0009] As a further embodiment of this utility model: the front sidewalls of the two vertical sections of the mounting frame are provided with equally spaced slots from top to bottom, and the upper two ends of the mounting frame are fixedly connected with a locking rod, one end of which is inserted into the corresponding slot.

[0010] As a further improvement of this utility model, the isolation plate is made of transparent acrylic material, and handles are fixedly connected to both ends of the front side of the isolation plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention, through the setting of an interlocking mechanism, allows for the following: When maintenance of electrical components inside the cabinet is required, if the power is not off, the electromagnetic block is also energized, and its attraction force is greater than the elastic contraction force of the tension spring. At this time, the electromagnetic block magnetically attracts and adheres to the iron block, and the tension spring is stretched to generate an elastic contraction force, causing the two L-shaped limiting rods to be locked on the outside of the isolation plate. This restricts the displacement of the isolation plate, preventing maintenance operations from being performed without power off, thus improving safety. Only after power is off, the electromagnetic block is also de-energized and loses its magnetic attraction. At this time, the elastic contraction of the tension spring drives the L-shaped limiting rods to move backward, losing their limitation on the isolation plate, allowing the isolation plate to be moved for maintenance. By setting the isolation plate to be made of transparent acrylic material, it is insulated and easy to observe, facilitating subsequent maintenance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention with the cabinet body removed;

[0015] Figure 3 For the present utility model Figure 2 A magnified structural diagram at point A;

[0016] Figure 4 This is a three-dimensional sectional view of the interlocking mechanism of this utility model;

[0017] Figure 5 This is a three-dimensional cross-sectional view of the springback mechanism of this utility model.

[0018] The correspondence between the labels and component names in the attached figures is as follows:

[0019] 1. Cabinet body; 2. Mounting frame; 3. Slide rail; 4. Slider; 5. Partition plate; 6. Housing; 7. Divider plate; 8. Slide rod; 9. Tension spring; 10. Iron block; 11. Electromagnetic block; 12. L-shaped limit rod; 13. Groove; 14. Hollow block; 15. Slide plate; 16. Pull rod; 17. Compression spring; 18. Connecting block; 19. Slot; 20. Locking rod; 21. Handle bracket. Detailed Implementation

[0020] Please see Figures 1-5This embodiment provides an internal isolation device for a low-voltage switchgear, which includes a cabinet body 1 and an isolation device installed at the front end of the cabinet body 1. The isolation device includes a vertically arranged mounting frame 2. Both sides of the mounting frame 2 are provided with sliding grooves 3 to facilitate the sliding displacement adjustment of the isolation plate 5 on the mounting frame 2, thereby facilitating subsequent maintenance of electrical components. Several sliders 4 are slidably connected in the two sliding grooves 3. A spring mechanism is fixedly connected to each of the two opposing sliders 4. An isolation plate 5 is fixedly connected between the two opposing spring mechanisms. The isolation plate 5 is set at the point of disconnection of gas and cable for shielding and isolation. Both sides of the inner wall of the mounting frame 2 are fixedly connected with interlocking mechanisms for limiting the position of the isolation plate 5.

[0021] The interlocking mechanism includes a housing 6 fixed to the inner wall of the vertical section of the mounting frame 2. A partition plate 7 is fixedly connected to the inner wall of the housing 6. A horizontally arranged slide rod 8 is inserted into and slidably connected to the side wall of the partition plate 7. A tension spring 9 is fixedly connected between one end of the slide rod 8 and the inner wall of the housing 6. An iron block 10 is fixedly connected to the end of the slide rod 8 away from the tension spring 9. An electromagnetic block 11 corresponding to the iron block 10 is fixedly connected to the inner wall of the end of the housing 6 away from the tension spring 9. Two symmetrically arranged L-shaped limiting rods 12 are fixedly connected to both ends of the iron block 10. The upper and lower side walls of the housing 6 are provided with slots 13. The two L-shaped limiting rods 12 pass through the two slots 13 and extend to the upper and lower sides of the partition plate 5, respectively. When it is necessary to inspect the electrical components inside the cabinet body 1, if the power is not off, the electromagnetic block 11 is also energized. Its attraction force is greater than the elastic contraction force of the tension spring 9. At this time, the electromagnetic block 11 magnetically attracts and adheres to the iron block 10. The tension spring 9 is stretched and generates an elastic contraction force, causing the two L-shaped limit rods 12 to be locked on the outside of the isolation plate 5. This can limit the displacement of the isolation plate 5 and prevent maintenance operations from being carried out without power off, thus improving safety protection. Only after the power is off will the electromagnetic block 11 also lose its magnetic attraction force. At this time, the elastic contraction of the tension spring 9 will drive the L-shaped limit rods 12 to move backward, losing their limitation on the isolation plate 5. Only then can the isolation plate 5 be moved for maintenance.

[0022] like Figure 3 and Figure 5As shown: The rebound mechanism includes a hollow block 14 fixedly connected to the slider 4. A slider 15 is slidably connected to the inner wall of the hollow block 14. A pull rod 16 is fixedly connected to one side of the slider 15. A compression spring 17 is fixedly connected between the slider 15 and the inner wall of the hollow block 14. One end of the pull rod 16 passes through the front side wall of the hollow block 14 and is fixedly connected to a connecting block 18. The connecting block 18 is fixedly connected to one end of the isolation plate 5. When the isolation plate 5 is pulled forward away from the mounting frame 2, the pull rod 16 fixed to the connecting block 18 is displaced, thereby causing the slider 15 to displace in the hollow block 14. At this time, the compression spring 17 is compressed and contracts to generate elastic force. When the isolation plate 5 is released, the elastic force of the compression spring 17 is used to drive the isolation plate 5 to automatically reset and stick to the mounting frame 2.

[0023] like Figure 4 As shown: Electromagnetic block 11 is electrically connected to the main power supply terminal of the circuit breaker inside the low-voltage cabinet through a wire to ensure the linkage effect. When the electrical components inside the cabinet body 1 are energized, electromagnetic block 11 is also energized to generate a strong magnetic force. When the electrical components inside the cabinet body 1 are de-energized, electromagnetic block 11 is also de-energized and loses its magnetic force.

[0024] like Figure 4 As shown: The side wall of the partition plate 7 is provided with a sliding hole, and the sliding rod 8 passes through the sliding hole and is slidably connected to it, which facilitates the lateral displacement of the sliding rod 8.

[0025] like Figure 3 As shown: The front sidewalls of the two vertical sections of the mounting frame 2 are provided with equally spaced slots 19 from top to bottom. Both ends of the upper side of the mounting frame 2 are fixedly connected with a locking rod 20. One end of the locking rod 20 is inserted into the corresponding slot 19. When the isolation plate 5 moves up and down, the locking rod 20 is locked into the slot 19 to prevent the isolation plate 5 from falling off.

[0026] like Figure 3 As shown: The isolation plate 5 is made of transparent acrylic material, which is insulated and easy to observe. Both ends of the front side of the isolation plate 5 are fixedly connected to handles 21, which facilitates the movement of the isolation plate 5.

[0027] Working principle: When it is necessary to inspect the electrical components inside the cabinet body 1, if the power is not off, the electromagnetic block 11 is also energized. Its attraction force is greater than the elastic contraction force of the tension spring 9. At this time, the electromagnetic block 11 magnetically attracts and adheres to the iron block 10. The tension spring 9 is stretched and generates an elastic contraction force, causing the two L-shaped limit rods 12 to be locked on the outside of the isolation plate 5. This can limit the displacement of the isolation plate 5 and prevent maintenance operations from being carried out without power off, thus improving safety protection. Only after the power is off will the electromagnetic block 11 also lose its magnetic attraction force. At this time, the elastic contraction of the tension spring 9 will drive the L-shaped limit rods 12 to move backward, losing the limitation on the isolation plate 5. Only then can the isolation plate 5 be moved for maintenance.

[0028] When the isolation plate 5 is pulled forward away from the mounting frame 2, the pull rod 16 fixed to the connecting block 18 is displaced, thereby causing the slide plate 15 to move in the hollow block 14. At this time, the compression spring 17 is squeezed and contracted to generate elastic force. When the locking rod 20 is completely separated from the locking groove 19, the sliding block 4 and the sliding groove 3 can push the isolation plate 5 to move on the mounting frame 2 to adjust the height, so as to expose the maintenance area covered by the isolation plate 5, thereby facilitating maintenance.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-voltage switchgear internal isolation device, comprising a switchgear body (1) and an isolation device installed at the front end inside the switchgear body (1), characterized in that, The isolation device includes a vertically arranged mounting frame (2), and sliding grooves (3) are provided on both sides of the mounting frame (2). Several sliders (4) are slidably connected in the two sliding grooves (3). A spring mechanism is fixedly connected on each of the two opposing sliders (4). An isolation plate (5) is fixedly connected between the two opposing spring mechanisms. An interlocking mechanism for limiting the isolation plate (5) is fixedly connected to both sides of the inner wall of the mounting frame (2). The interlocking mechanism includes a housing (6) fixed to the inner wall of the vertical section of the mounting frame (2). A partition plate (7) is fixedly connected to the inner wall of the housing (6). A horizontally arranged slide rod (8) is inserted into and slidably connected to the side wall of the partition plate (7). A tension spring (9) is fixedly connected between one end of the slide rod (8) and the inner wall of the housing (6). An iron block (10) is fixedly connected to the end of the slide rod (8) away from the tension spring (9). An electromagnetic block (11) corresponding to the iron block (10) is fixedly connected to the inner wall of the end of the housing (6) away from the tension spring (9). Two symmetrically arranged L-shaped limiting rods (12) are fixedly connected to both ends of the iron block (10). The upper and lower side walls of the housing (6) are provided with slots (13). The two L-shaped limiting rods (12) pass through the two slots (13) and extend to the upper and lower sides of the partition plate (5).

2. The internal isolation device for a low-voltage switchgear according to claim 1, characterized in that, The rebound mechanism includes a hollow block (14) fixedly connected to the slider (4), a sliding plate (15) slidably connected to the inner wall of the hollow block (14), a pull rod (16) fixedly connected to one side of the sliding plate (15), a compression spring (17) fixedly connected between the sliding plate (15) and the inner wall of the hollow block (14), one end of the pull rod (16) penetrates the front side wall of the hollow block (14) and is fixedly connected to a connecting block (18), and the connecting block (18) is fixedly connected to one end of the isolation plate (5).

3. The internal isolation device for a low-voltage switchgear according to claim 1, characterized in that, The electromagnetic block (11) is electrically connected to the main power supply terminal of the circuit breaker gas inside the low-voltage cabinet via a wire.

4. The internal isolation device for a low-voltage switchgear according to claim 1, characterized in that, The partition plate (7) has a sliding hole on its side wall, and the sliding rod (8) passes through the sliding hole and is slidably connected to it.

5. The internal isolation device for a low-voltage switchgear according to claim 1, characterized in that, The two vertical sections of the mounting frame (2) have equally spaced slots (19) on their front sidewalls from top to bottom. Both ends of the upper side of the mounting frame (2) are fixedly connected to a locking rod (20), and one end of the locking rod (20) is inserted into the corresponding slot (19).

6. The internal isolation device for a low-voltage switchgear according to claim 1, characterized in that, The isolation plate (5) is made of transparent acrylic material, and handles (21) are fixedly connected to both ends of the front side of the isolation plate (5).

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