Self-recovery pressure relief device of power switch cabinet and power switch cabinet
By designing a non-90-degree inclined extension section and a four-sided folded edge structure in the pressure relief device of the power switchgear, the problem of the pressure relief cover deforming and failing to self-reset after repeated opening and closing was solved, thus improving the reliability of the device and the maintenance cycle.
Patent Information
- Application Number
- CN202422756099.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The pressure relief device of the existing power switchgear needs to be replaced after one use, and the pressure relief cover deforms after repeated opening and closing, making it unable to reset itself.
The extension section of the pressure relief plate is designed to be a non-90-degree inclined surface, and adopts a four-sided upward folding structure. The folding and extension section work together to ensure that it does not deform after multiple opening and closing, thus achieving a self-recovery function.
This solved the problem of the pressure relief cover deforming and failing to self-reset after repeated opening and closing, thus improving the reliability of the device and the maintenance cycle.
Smart Images
Figure CN223797800U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of power switchgear technology, specifically relating to a self-resetting pressure relief device for power switchgear and a power switchgear. Background Technology
[0002] Currently, most power switch cabinets are equipped with circuit breakers. In the event of a short circuit or emergency, the circuit breaker inside the cabinet may explode, producing a large amount of high-temperature and high-pressure gas. If the gas is not removed in time, it will cause secondary damage to other components inside the cabinet and the cabinet itself.
[0003] The inventors discovered that all power switchgear is equipped with a pressure relief device on top. This device needs to be replaced after each use, which increases the time required to restore power supply and is not suitable for some special locations with high power supply requirements. The solution to solve the problem of needing to replace the pressure relief device after each use is to install a pressure relief cover on the pressure relief device. However, the extension section of the cover plate is at a right angle. After repeated opening and closing, the pressure relief cover will bend due to the force, causing it to deform and resulting in the pressure relief cover failing to self-reset after being opened. Utility Model Content
[0004] To address the aforementioned problems, this invention proposes a self-resetting pressure relief device for power switchgear and a power switchgear itself. The extension section is designed as a non-90-degree inclined surface, and the pressure relief cover is designed with an upward-folding structure on all four sides. The folded edges cooperate with the extension section, and the end face of the folded edges contacts the surface of the extension section, ensuring that the extension section does not deform after multiple openings and closings. This solves the problem of the pressure relief cover deforming after multiple openings and closings, causing it to fail to self-reset after opening.
[0005] According to some embodiments, the first solution of this utility model provides a self-resetting pressure relief device for a power switchgear, which adopts the following technical solution:
[0006] A self-resetting pressure relief device for a power switchgear includes a mounting plate and a plurality of pressure relief plates hinged to the mounting plate;
[0007] Each pressure relief plate has an extension section on the hinged side at an angle, and folded edges on the other sides at an angle.
[0008] Furthermore, the mounting plate includes multiple side plates and a connecting plate disposed on the side plates.
[0009] Furthermore, the connecting plate has multiple bolt holes.
[0010] Furthermore, a top plate is provided at the end of the multiple side plates away from the connecting plate, and the top plate is provided with multiple pressure relief holes.
[0011] Furthermore, each pressure relief hole is equipped with a pressure relief plate via a hinge.
[0012] Furthermore, the hinge is a folding hinge.
[0013] Furthermore, the top plate is provided with two rows of pressure relief holes, and the hinge is provided at the adjacent ends of the two rows of pressure relief holes.
[0014] Furthermore, heat dissipation holes are provided on the side plate.
[0015] According to some embodiments, the second aspect of this utility model provides a power switchgear, which adopts the following technical solution:
[0016] A power switch cabinet includes a cabinet body and a self-resetting pressure relief device for the power switch cabinet as described in the first embodiment, which is installed on the cabinet body.
[0017] Furthermore, the self-resetting pressure relief device of the power switchgear is bolted to the top of the cabinet.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] This utility model includes a mounting plate and multiple pressure relief plates hinged to the mounting plate. Each pressure relief plate has an extension section inclined on one side where it is hinged, and folded edges inclined on the other sides. The extension section is set as a non-90-degree inclined surface and is provided with folded edges. The folded edges cooperate with the extension section, and the end face of the folded edges contacts the surface of the extension section. The extension section does not deform after multiple opening and closing, which solves the problem that the pressure relief cover cannot self-reset after opening due to deformation after multiple opening and closing. Attached Figure Description
[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0021] Figure 1 This is a schematic diagram of the power switchgear of this utility model in use;
[0022] Figure 2 This is a schematic diagram of the pressure relief plate in the closed state of this utility model;
[0023] Figure 3 This is a schematic diagram of the pressure relief plate of this utility model in the open state;
[0024] Figure 4 This is a schematic diagram of the extension section and folded edge of this utility model;
[0025] Figure 5 This is a schematic diagram of the angle of the pressure relief plate in the closed state of this utility model;
[0026] Figure 6This is a schematic diagram of the angle of the pressure relief plate of this utility model when it is in the open state;
[0027] The components are: 1. Switch cabinet; 2. Pressure relief device; 3. Pressure relief plate; 31. Folded edge; 32. Extension section; 4. Hinge; 5. Mounting plate; 51. Side plate; 52. Connecting plate; 53. Heat dissipation hole; 54. Top plate. Detailed implementation method:
[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0030] Example 1:
[0031] In existing technologies, a solution that addresses the need for replacement of a pressure relief device after each use involves installing a pressure relief cover. However, the cover's extension is at a right angle, and repeated opening and closing can cause it to bend due to stress, leading to deformation and preventing it from self-resetting after opening. To address this issue, this embodiment provides a self-resetting pressure relief device for a power switchgear, comprising a mounting plate 5 and multiple pressure relief plates 3 hinged to the mounting plate 5.
[0032] Each pressure relief plate 3 has an extension section 32 inclined on one side where it is hinged, and folded edges 31 inclined on the other sides.
[0033] Each pressure relief plate 3 has an extension section 32 on one side of the hinge and a folded edge 31 on the other side. The extension section 32 is set as a non-90-degree inclined surface and the folded edge 31 is provided. The folded edge 31 cooperates with the extension section 32, and the end face of the folded edge 31 contacts the surface of the extension section 32. The extension section does not deform after multiple opening and closing, which solves the problem that the pressure relief cover cannot self-reset after opening due to deformation after multiple opening and closing.
[0034] Optionally, the inclination of extension 32 is 125 degrees, or any other angle greater than 90 degrees and less than 180 degrees.
[0035] The mounting plate 5 includes multiple side plates 51 and connecting plates 52 disposed on the side plates. Optionally, four side plates 51 are used to form a rectangular frame, and ear plates are welded to both ends of the rectangular frame as connecting plates 52. Multiple bolt holes 53 can be provided on the connecting plates 52 for connection with the power switch cabinet. Optionally, three bolt holes are provided on each connecting plate 52.
[0036] In this embodiment, a top plate 54 is provided at the end of the multiple side plates away from the connecting plate by conventional methods such as welding. The top plate 54 is provided with multiple pressure relief holes. Each pressure relief hole is provided with a pressure relief plate 3 via a hinge 4. Optionally, the pressure relief plate 3 is a hinge, and the number of pressure relief holes is 12.
[0037] In this embodiment, the top plate 54 is provided with two rows of pressure relief holes, with 6 holes in each row. The hinge 4 at each pressure relief hole is provided at the adjacent ends of the two rows of pressure relief holes.
[0038] The side plate 51 is provided with heat dissipation holes 54 for heat dissipation during the operation of the power switch cabinet. It is understood that the location where the pressure relief device is installed in the power switch cabinet is a hollow structure.
[0039] The working principle or process of this embodiment is as follows:
[0040] When an explosion occurs inside the power switch cabinet, the high-pressure gas inside the cabinet pushes open the pressure relief plate. The high-pressure gas enters the mounting plate 5 through the perforation on the cabinet body and then exits through the pressure relief hole. Because the extension section is an inclined surface, the entire pressure relief plate 3 is in an inclined state when opened. After the high-pressure gas is discharged, the inclined pressure relief plate will automatically return to its original position under the action of gravity. The extension section does not deform after multiple opening and closing, which solves the problem of the pressure relief cover deforming after multiple opening and closing, causing it to be unable to self-reset after opening.
[0041] Example 2:
[0042] This embodiment provides a power switch cabinet, including a cabinet body and a self-resetting pressure relief device as described in Embodiment 1, which is installed on the cabinet body.
[0043] It is understandable that a hollow rectangular opening for pressure relief is made on the top of the power switch cabinet; the mounting plate in the pressure relief device is fixed to the rectangular opening through the bolt holes on the connecting plate 52.
[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A self-resetting pressure relief device for a power switchgear, characterized in that, Includes a mounting plate and multiple pressure relief plates hinged to the mounting plate; Each pressure relief plate has an extension section on the hinged side and folded edges on the other sides. The mounting plate includes multiple side plates and a connecting plate disposed on the side plates; the connecting plate has multiple bolt holes; a top plate is disposed at the end of the multiple side plates away from the connecting plate, and multiple pressure relief holes are disposed on the top plate; each pressure relief hole is provided with a pressure relief plate by means of a hinge.
2. The self-resetting pressure relief device for a power switchgear as described in claim 1, characterized in that, The hinge is a folding hinge.
3. The self-resetting pressure relief device for a power switchgear as described in claim 1, characterized in that, The top plate has two rows of pressure relief holes, and the hinge is located at the adjacent ends of the two rows of pressure relief holes.
4. The self-resetting pressure relief device for a power switchgear as described in claim 1, characterized in that, The side plate has heat dissipation holes.
5. A power switchgear, characterized in that, It includes a cabinet and a self-resetting pressure relief device for the power switchgear as described in any one of claims 1-4, which is installed on the cabinet.
6. A power switchgear as described in claim 5, characterized in that, The self-resetting pressure relief device of the power switchgear is installed on the top of the cabinet by bolts.