An automatic pressure relief high-voltage power distribution cabinet
By designing components such as pressure-conducting pipes and electromagnets, the problem of unstable pressure relief in high-voltage distribution cabinets was solved, achieving a stable and efficient pressure relief effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHONGYAN ELECTRICAL GROUP CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-06-09
Smart Images
Figure CN224342813U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical distribution box (distribution cabinet) installation and commissioning technology, and in particular to a high-voltage distribution cabinet with automatic pressure relief. Background Technology
[0002] Distribution cabinets are divided into power distribution cabinets, lighting distribution cabinets, and metering cabinets, and are the final-level equipment in a power distribution system. Distribution cabinets are a general term for motor control centers. Distribution cabinets are used in situations where the load is relatively dispersed and there are few circuits; motor control centers are used in situations where the load is concentrated and there are many circuits. They distribute the electrical energy of a circuit from the previous-level power distribution equipment to the nearest load. This level of equipment should provide protection, monitoring, and control for the load. Distribution cabinets are equipped with busbar compartments to house the busbars. When a short circuit or grounding fault occurs on the busbar, it will generate very high pressure. To prevent the busbar compartment from exploding due to high voltage, a pressure relief port is also provided in the busbar compartment, and a pressure relief plate is installed on top of the pressure relief port.
[0003] In the operation of existing automatic pressure relief high-voltage distribution cabinets, the pressure relief mechanism is generally driven by the gas pressure inside the distribution cabinet, so that the high-pressure gas inside can be released through the movement of the pressure relief mechanism. However, during use, the pressure inside the distribution cabinet drops instantly at the moment of release of high-pressure gas, causing the pressure relief mechanism to move back and forth, resulting in unstable pressure relief and low pressure relief efficiency, which is inconvenient for users. Utility Model Content
[0004] This application provides an automatic pressure relief high-voltage distribution cabinet to solve the problem that existing automatic pressure relief high-voltage distribution cabinets, in use, generally rely on the gas pressure inside the distribution cabinet to drive the pressure relief mechanism, so that the high-pressure gas inside can be released through the movement of the pressure relief mechanism. However, during use, because the pressure inside the distribution cabinet drops instantly at the moment of release of high-pressure gas, the pressure relief mechanism will move back and forth, resulting in unstable pressure relief and low pressure relief efficiency.
[0005] This application provides an automatic pressure relief high-voltage distribution cabinet, including a cabinet body, a pressure guiding pipe installed at the top of the cabinet body, a pressure relief box installed at the top of the pressure guiding pipe, a return spring installed inside the pressure relief box, a movable plate installed at one end of the return spring, a fixed plate installed inside the pressure relief box, a pressure sensor installed on the side of the fixed plate near the movable plate, a contact piece installed on the side of the movable plate near the fixed plate, an electromagnet installed on the side of the fixed plate near the movable plate, and an iron ring installed on one end of the movable plate.
[0006] Preferably, a cabinet door is installed at one end of the main body of the power distribution cabinet.
[0007] Preferably, a rain shield is installed on one side of the pressure relief box.
[0008] Preferably, a dustproof plate is installed on one side of the rainproof plate.
[0009] Preferably, mounting plates are installed at both ends of the return spring.
[0010] Preferably, limit sliders are installed at both the upper and lower ends of the movable plate, and limit grooves are formed inside the pressure relief box.
[0011] Preferably, the pressure relief box has two sets of pressure relief ports on one side.
[0012] Beneficial effects:
[0013] Considering that existing automatic pressure relief high-voltage distribution cabinets generally use the gas pressure inside the distribution cabinet to drive the pressure relief mechanism, so that the high-pressure gas inside can be released through the movement of the pressure relief mechanism, during use, because the pressure inside the distribution cabinet drops instantly at the moment of release of high-pressure gas, the pressure relief mechanism will move back and forth to relieve pressure, resulting in unstable pressure relief and low pressure relief efficiency.
[0014] When the internal pressure of the distribution cabinet is too high, the pressurized gas will enter the pressure relief box through the pressure guide pipe at the top. The gas will then push the two sets of moving plates away from each other until they reach the fixed plate. At this time, the two sets of pressure relief ports will be connected to the main body of the distribution cabinet through the pressure guide pipe, allowing the gas to be discharged through the two sets of pressure relief ports, thereby reducing the internal pressure of the distribution cabinet. At the same time, when the moving plate moves towards the fixed plate, the contact piece will touch the pressure sensor. At this time, the electromagnet will be energized, causing the electromagnet to attract the iron ring, thereby fixing the moving plate. This prevents the gas from being discharged through the pressure relief port when the moving plate moves to the pressure relief port, which would cause the internal pressure of the distribution cabinet to drop instantly and cause the moving plate to move back and forth, thus increasing the pressure relief rate.
[0015] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. 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 overall structure of a high-voltage distribution cabinet with automatic pressure relief according to this utility model.
[0018] Figure 2 This is a schematic diagram of the pressure-conducting pipe structure of an automatic pressure-relief high-voltage distribution cabinet according to this utility model.
[0019] Figure 3 This is a cross-sectional view of the pressure relief box of an automatic pressure relief high-voltage distribution cabinet according to the present invention.
[0020] Figure 4 This is a schematic diagram of the internal structure of the pressure relief box of an automatic pressure relief high-voltage distribution cabinet according to this utility model.
[0021] Figure 5 This is a schematic diagram of the moving plate and fixed plate structure of an automatic pressure relief high-voltage distribution cabinet according to this utility model.
[0022] Explanation of reference numerals in the attached figures:
[0023] 1. Main body of the distribution cabinet; 2. Cabinet door; 3. Pressure guide pipe; 4. Pressure relief box; 5. Rain shield; 6. Dust shield; 7. Return spring; 8. Mounting plate; 9. Moving plate; 10. Limit slider; 11. Limit slide groove; 12. Fixing plate; 13. Pressure sensor; 14. Contact plate; 15. Electromagnet; 16. Iron ring; 17. Pressure relief port. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0025] Unless otherwise defined, 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 application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0026] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0027] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0030] This utility model provides, for example Figure 1-5The high-voltage distribution cabinet with automatic pressure relief shown includes a distribution cabinet body 1. A pressure guiding pipe 3 is installed at the top of the distribution cabinet body 1. A pressure relief box 4 is installed at the top of the pressure guiding pipe 3. A reset spring 7 is installed inside the pressure relief box 4. A movable plate 9 is installed at one end of the reset spring 7. A fixed plate 12 is also installed inside the pressure relief box 4. A pressure sensor 13 is installed on the side of the fixed plate 12 near the movable plate 9. A contact piece 14 is installed on the side of the movable plate 9 near the fixed plate 12. An electromagnet 15 is installed on the side of the fixed plate 12 near the movable plate 9. An iron ring 16 is installed on the side of the movable plate 9.
[0031] When the internal pressure of the main body 1 of the power distribution cabinet is too high, the pressurized gas inside will enter the pressure relief box 4 through the pressure guide pipe 3 at the top. Then, the gas will push the two sets of moving plates 9 away from each other until they move to the fixed plate 12. At this time, the two sets of pressure relief ports 17 will be connected to the main body 1 of the power distribution cabinet through the pressure guide pipe 3, so that the gas can be discharged through the two sets of pressure relief ports 17, thereby reducing the internal pressure of the main body 1 of the power distribution cabinet. At the same time, when the moving plate 9 moves towards the fixed plate 12, the contact piece 14 will touch the pressure sensor 13. At this time, the electromagnet 15 is energized, so that the electromagnet 15 attracts the iron ring 16, thereby fixing the moving plate 9. This prevents the gas from being discharged through the pressure relief port 17 when the moving plate 9 moves to the pressure relief port 17, which would cause the internal pressure of the main body 1 of the power distribution cabinet to drop instantly, causing the moving plate 9 to move back and forth, thus increasing the pressure relief rate.
[0032] A cabinet door 2 is installed at one end of the main body 1 of the power distribution cabinet.
[0033] A rain shield 5 is installed on one side of the pressure relief box 4.
[0034] By installing a rain shield 5 on the outside of the pressure relief port 17, rainwater can be prevented from entering the interior of the pressure relief box 4 through the pressure relief port 17 and causing damage to the components inside the pressure relief box 4.
[0035] A dustproof plate 6 is installed on one side of the rain shield 5.
[0036] Among them, by installing a dust baffle 6 on one side of the rain baffle 5, dust can be prevented from entering the interior of the pressure relief box 4, thereby increasing the service life of the internal mechanical components of the pressure relief box 4.
[0037] Mounting plates 8 are installed at both ends of the return spring 7.
[0038] The reset spring 7 is mounted on the pressure relief box 4 and the moving plate 9 respectively by the mounting plates 8 at both ends. Under the elastic force of the reset spring 7, the moving plate 9 can be returned to its original position when the pressure relief stops, thus achieving automatic reset.
[0039] Limiting sliders 10 are installed at both the top and bottom of the movable plate 9, and limiting grooves 11 are opened inside the pressure relief box 4.
[0040] When the moving plate 9 moves, the two sets of limiting sliders 10 above and below the moving plate 9 slide along the inside of the limiting groove 11. The movement of the moving plate 9 is limited by the limiting groove 11 and the limiting sliders 10, which increases the movement stability of the moving plate 9.
[0041] Two sets of pressure relief ports 17 are provided on one side of the pressure relief box 4.
[0042] The pressure inside the main body 1 of the power distribution cabinet is relieved through two sets of pressure relief ports 17.
[0043] Working principle: When this automatic pressure relief high-voltage distribution cabinet is in use, when the internal pressure of the main body 1 of the distribution cabinet is too high, the internal pressurized gas will enter the interior of the pressure relief box 4 along the pressure guide pipe 3 at the top. Then the gas will push the two sets of moving plates 9 to move away from each other until they move to the fixed plate 12. At this time, the two sets of pressure relief ports 17 will be connected to the main body 1 of the distribution cabinet through the pressure guide pipe 3, so that the gas can be discharged through the two sets of pressure relief ports 17, thereby reducing the internal pressure of the main body 1 of the distribution cabinet.
[0044] When the movable plate 9 moves toward the fixed plate 12, the contact piece 14 will touch the pressure sensor 13. At this time, the electromagnet 15 is energized, causing the electromagnet 15 to attract the iron ring 16, thereby fixing the movable plate 9. This prevents gas from being discharged through the pressure relief port 17 when the movable plate 9 moves to the pressure relief port 17, which would cause the internal pressure of the main body 1 of the power distribution cabinet to drop instantly, causing the movable plate 9 to move back and forth, thus increasing the pressure relief rate.
[0045] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A high-voltage distribution cabinet with automatic pressure relief, comprising a cabinet body (1), characterized in that: A pressure guide pipe (3) is installed at the top of the main body (1) of the power distribution cabinet. A pressure relief box (4) is installed at the top of the pressure guide pipe (3). A reset spring (7) is installed inside the pressure relief box (4). A moving plate (9) is installed at one end of the reset spring (7). A fixed plate (12) is also installed inside the pressure relief box (4). A pressure sensor (13) is installed on the side of the fixed plate (12) near the moving plate (9). A contact piece (14) is installed on the side of the moving plate (9) near the fixed plate (12). An electromagnet (15) is installed on the side of the fixed plate (12) near the moving plate (9). An iron ring (16) is installed on the side of the moving plate (9).
2. The high-voltage distribution cabinet with automatic pressure relief according to claim 1, characterized in that: A cabinet door (2) is installed at one end of the main body (1) of the power distribution cabinet.
3. The high-voltage distribution cabinet with automatic pressure relief according to claim 1, characterized in that: A rain shield (5) is installed on one side of the pressure relief box (4).
4. The high-voltage distribution cabinet with automatic pressure relief according to claim 3, characterized in that: A dustproof plate (6) is installed on one side of the rainproof plate (5).
5. The high-voltage distribution cabinet with automatic pressure relief according to claim 1, characterized in that: Mounting plates (8) are installed at both ends of the return spring (7).
6. The high-voltage distribution cabinet with automatic pressure relief according to claim 1, characterized in that: Limiting sliders (10) are installed at both the upper and lower ends of the movable plate (9), and a limiting groove (11) is opened inside the pressure relief box (4).
7. The high-voltage distribution cabinet with automatic pressure relief according to claim 1, characterized in that: Two sets of pressure relief ports (17) are provided on one side of the pressure relief box (4).