Switch cabinet pressure relief device and switch cabinet

Abstract

The utility model relates to the technical field of switch cabinets, and discloses a switch cabinet pressure relief device and a switch cabinet, the switch cabinet pressure relief device comprises a pressure relief pipeline member and a pressure relief cover, a pressure relief channel is arranged in the pressure relief pipeline member, one end of the pressure relief pipeline member is fixed on a switch cabinet shell, and the other end of the pressure relief pipeline member is provided with a first magnetic assembly which is rotatably connected with the pressure relief cover provided with a second magnetic assembly; the second magnetic assembly and the first magnetic assembly are magnetically attracted, the pressure relief cover can cover the pressure relief channel, the pressure relief channel is prevented from being communicated with the outside, and the safety of the surrounding environment and lines of the switch cabinet is guaranteed; when a fault occurs in the switch cabinet and high-temperature and high-pressure gas is generated, the magnetic attraction part is burst open, the pressure relief cover and the other end of the pressure relief pipeline piece rotate by a certain angle, the pressure relief channel is opened, the high-temperature and high-pressure gas is released in time, then the pressure relief cover falls back under the action of the weight of the pressure relief cover, and the first magnetic assembly and the second magnetic assembly are magnetically attracted again. And the pressure relief cover can automatically rotate and can timely cover the pressure relief channel, so that the accident hazard of the switch cabinet is effectively prevented from spreading.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to a switch cabinet pressure relief device and a switch cabinet. Background Art

[0002] Switchgear is an electrical equipment. Its main function is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. The external line of the switchgear first enters the main control switch in the cabinet, and then enters the branch control switch. Each branch is set according to its needs. According to different voltage levels, it can be divided into high-voltage switchgear, medium-voltage switchgear and low-voltage switchgear.

[0003] During the operation of the switch cabinet, due to various reasons, such as short circuit, insulation aging and human error, short circuit faults may occur. Under the short circuit current of tens of thousands of amperes, high-temperature and high-pressure gas will be instantly generated. If the high-temperature and high-pressure gas cannot be effectively released in a very short time in the narrow cabinet, it will cause the switch cabinet to explode, damage the adjacent switch cabinets, and may also endanger personal safety. Therefore, effective pressure relief measures must be considered when designing the switch cabinet.

[0004] In the prior art, some pressure relief devices suitable for medium and high voltage switchgear are equipped with pressure relief covers, and fixing bolts are installed on both sides of the pressure relief cover. The fixing bolts on one side are made of metal, which can prevent the pressure relief cover from separating from the switchgear when a normal fault occurs; the bolts on the other side are made of plastic. When a high-temperature and high-pressure gas is generated inside the switchgear due to a high-risk fault such as a short circuit, the plastic bolts will be flushed open by the high-pressure gas, and the pressure relief cover will also be opened randomly, and the high-pressure gas will be released in time. However, the pressure relief cover will always be in an open state at this time, which will further threaten the surrounding environment and lines of the switchgear. Utility Model Content

[0005] The utility model aims to provide a switch cabinet pressure relief device and a switch cabinet with simple structure, convenient installation, higher safety, timely pressure relief and automatic closing after pressure relief, so as to effectively prevent the spread of switch cabinet accident hazards.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Switchgear pressure relief device, including:

[0008] A pressure relief frame and a pressure relief cover arranged on the top of the pressure relief frame, wherein a pressure relief channel connected to the pressure relief port of the switch cabinet housing is formed in the pressure relief frame;

[0009] One end of the pressure relief cover is rotatably connected to the top of the pressure relief frame, the other end of the pressure relief cover is provided with a second magnetic component, and a first magnetic component adapted to the second magnetic component is provided at a corresponding position on the top of the pressure relief frame.

[0010] As an optional technical solution for the switch cabinet pressure relief device, the first magnetic component is arranged on the top of the pressure relief frame, and the second magnetic component is arranged on the side of the pressure relief cover facing the pressure relief frame.

[0011] As an optional technical solution for the switch cabinet pressure relief device, one end of the pressure relief cover is connected to the top of the pressure relief frame by a hinge, and the pressure relief cover can rotate at an angle less than 90°.

[0012] As an optional technical solution for the switch cabinet pressure relief device, the pressure relief frame is formed by multiple pipe side panels connected end to end to form the pressure relief channel, and the pressure relief cover is arranged to fit the side surfaces of the multiple pipe side panels facing the pressure relief frame.

[0013] As an optional technical solution for the switch cabinet pressure relief device, a sealing ring is circumferentially arranged on the top of the pressure relief frame, and the pressure relief cover abuts against the sealing ring.

[0014] As an optional technical solution for the switch cabinet pressure relief device, a connecting flange is circumferentially provided at the bottom of the pressure relief frame, and the connecting flange is used for fixed connection with the switch cabinet housing.

[0015] As an optional technical solution for the switch cabinet pressure relief device, the first magnetic component includes a plurality of first magnetic parts spaced apart at the top of the pressure relief frame, and the second magnetic component includes a plurality of second magnetic parts spaced apart at the other end of the pressure relief cover, and the first magnetic parts are magnetically connected to the second magnetic parts in a one-to-one correspondence.

[0016] A switch cabinet comprises a switch cabinet housing and a switch cabinet pressure relief device as described in any one of the above items.

[0017] As an optional technical solution for the switch cabinet, a pressure relief port is provided on the top of the switch cabinet housing, and the bottom of the pressure relief frame is fixedly connected to the top of the switch cabinet housing.

[0018] As an optional technical solution for the switch cabinet, the switch cabinet housing is provided with a plurality of pressure relief ports, each of which is provided with a corresponding switch cabinet pressure relief device, and the switch cabinet housing is provided with a plurality of cabinet compartments, each of which is provided with at least one pressure relief port.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a switch cabinet pressure relief device and a switch cabinet, wherein the switch cabinet pressure relief device comprises a pressure relief frame and a pressure relief cover arranged on the top of the pressure relief frame, wherein a pressure relief channel connected to the pressure relief port of the switch cabinet housing is formed in the pressure relief frame, one end of the pressure relief cover is rotatably connected to the top of the pressure relief pipe frame, and a second magnetic component is further arranged at the other end of the pressure relief cover, and a first magnetic component adapted to the second magnetic component is arranged at a position corresponding to the top of the pressure relief frame, and the pressure relief cover is selectively arranged on the other end of the pressure relief channel to prevent the pressure relief channel from being connected to the outside world, so as to ensure the safety of the environment around the switch cabinet and the circuit; when the switch cabinet is working normally, the second magnetic component and The first magnetic component is magnetically attracted to seal the pressure relief channel; when high-temperature and high-pressure gas is generated inside the switch cabinet due to a high-risk fault such as a short circuit, the magnetic attraction part will be opened, and one end of the pressure relief cover will rotate a certain angle with the top of the pressure relief pipe frame to open the pressure relief channel, and the high-temperature and high-pressure gas will be released in time, and then the pressure relief cover will fall back under the action of its own weight, and the first magnetic component will be magnetically attracted to the second magnetic component again, and the pressure relief cover can automatically rotate and ensure that the pressure relief channel is covered in time, isolating oxygen to a certain extent to prevent fire and combustion, and can effectively prevent the further spread of hazards when an accident occurs in the switch cabinet; the structure is simple, easy to install, and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural perspective view of a switch cabinet pressure relief device provided by a specific embodiment of the utility model;

[0022] Figure 2 It is a side view of a switch cabinet provided by a specific implementation manner of the utility model.

[0023] In the figure:

[0024] 100, pressure relief frame; 101, pipeline side plate; 102, connecting flange; 121, first magnetic member;

[0025] 200, pressure relief cover; 210, second magnetic member; 220, hinge;

[0026] 10. Switch cabinet pressure relief device; 20. Switch cabinet housing; 21. Cabinet compartment. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] like Figure 1 and Figure 2 As shown in , the utility model discloses a switch cabinet pressure relief device 10 , including a pressure relief frame 100 and a pressure relief cover 200 arranged on the top of the pressure relief frame 100 .

[0032] A pressure relief channel connected to the pressure relief port of the switch cabinet housing 20 is formed in the pressure relief frame 100. One end of the pressure relief cover 200 is rotatably connected to the top of the pressure relief frame 100. A second magnetic component is also provided at the other end of the pressure relief cover 200. A first magnetic component compatible with the second magnetic component is provided at a position corresponding to the top of the pressure relief frame 100. The pressure relief cover 200 is selectively covered on the other end of the pressure relief channel to prevent the pressure relief channel from connecting with the outside world, thereby ensuring the safety of the surrounding environment and lines of the switch cabinet. When the switch cabinet is operating normally, the second magnetic component is magnetically attracted to the first magnetic component to seal the pressure relief channel; when high-temperature and high-pressure gas is generated inside the switch cabinet due to a high-risk fault such as a short circuit, the magnetic attraction part will be opened, and the magnetic force can slightly buffer the airflow; one end of the pressure relief cover 200 is rotated at a certain angle to the top of the pressure relief frame 100 to open the pressure relief channel, and the high-temperature and high-pressure gas is released in time, and then the pressure relief cover 200 will fall back under the action of its own weight, and the first magnetic component and the second magnetic component will be magnetically attracted again, and the pressure relief cover 200 can automatically rotate and ensure that the pressure relief channel is covered in time, isolating oxygen to a certain extent to prevent fire and combustion, and can effectively prevent the further spread of hazards when an accident occurs in the switch cabinet.

[0033] Specifically, one end of the pressure relief cover 200 is rotatably connected to the top of the pressure relief frame 100, the first magnetic component is arranged on the end surface of the top of the pressure relief frame 100, and the second magnetic component is arranged on the side of the pressure relief cover 200 facing the pressure relief frame 100. The second magnetic component selectively abuts against the first magnetic component. When the relative rotation angle between the pressure relief cover 200 and the top of the pressure relief frame 100 is 0°, the second magnetic component is magnetically connected to the first magnetic component. The pressure relief cover 200 is covered on the top of the pressure relief frame 100 to block the pressure relief channel, thereby further ensuring that faults occurring in the switch cabinet do not affect the safety of the surrounding environment and the lines.

[0034] Optionally, the pressure relief frame 100 is formed by connecting multiple pipe side panels 101 end to end to form a pressure relief channel, and the pressure relief cover 200 is arranged to fit the side surfaces of the multiple pipe side panels 101 facing the pressure relief frame 100. In the present embodiment, there are four pipe side panels 101, which are spliced ​​and combined along the four sides to form a square pipe structure. Correspondingly, the pressure relief cover 200 is also arranged to have a square outer contour, and can completely fit the pressure relief frame 100 and cover the pressure relief channel. The pressure relief cover 200 has a first side and a second side relative to each other, and the top of the pressure relief frame 100 also has a first side and a second side relative to each other. The first side of the pressure relief cover 200 is rotatably connected to the first side of the top of the pressure relief frame 100, and the second side of the pressure relief cover 200 and the second side of the top of the pressure relief frame 100 are respectively provided with a second magnetic component and a first magnetic component. When the switch cabinet is working normally, the pressure relief cover 200 is stably connected to the pressure relief frame 100. Exemplarily, a sealing ring is circumferentially provided on the end surface of the top of the pressure relief frame 100 , and the pressure relief cover 200 abuts against the sealing ring, which can improve the sealing performance of the pressure relief channel when the switch cabinet is working normally.

[0035] Furthermore, one end of the pressure relief cover 200 is connected to the top of the pressure relief frame 100 by a hinge 220, and a plurality of hinges 220 with a rotatable angle less than 90° are selected. The plurality of hinges 220 are arranged at intervals along the first side of the pressure relief cover 200 to control the relative rotatable angle between the pressure relief cover 200 and the pressure relief frame 100 to be less than 90°. The purpose of such arrangement is to prevent the pressure relief cover 200 and the pressure relief frame 100 from rotating at an excessively large angle. When high-temperature and high-pressure gas is generated inside the switch cabinet due to a high-risk fault such as a short circuit, the magnetic part will be opened. Under the action of inertial force, if it is not controlled, the relative rotation angle between the two is very likely to exceed 90°. The pressure relief cover 200 will continue to increase its rotation angle under the action of its own weight, and will not be able to fall back and cover the pressure relief channel by the action of the magnetic attraction alone, which may easily lead to safety risks. Exemplarily, different numbers of hinges 220 are selected according to the specifications of the switch cabinet pressure relief device 10 . In this embodiment, four hinges 220 are selected and evenly arranged to ensure stable hinge connection between the pressure relief cover 200 and the top of the pressure relief frame 100 .

[0036] Optionally, the first magnetic component includes a plurality of first magnetic members 121 spaced apart on the pressure relief frame 100, and are specifically evenly installed along the second side of the top of the pressure relief frame 100; the second magnetic component includes a plurality of second magnetic members 210 spaced apart on the pressure relief cover 200; the first magnetic members 121 are magnetically connected to the second magnetic members 210 in a one-to-one correspondence, thereby ensuring a stable magnetic connection between the pressure relief cover 200 and the top of the pressure relief frame 100; it should be noted that it is necessary to check whether the positive and negative poles of the first magnetic member 121 and the second magnetic member 210 are installed correctly, and whether there is sufficient magnetic attraction to enable the pressure relief cover 200 to rotate smoothly and be stably buckled with the top of the pressure relief frame 100.

[0037] In this embodiment, a connecting flange 102 is provided on the outer side of the bottom of the pressure relief frame 100 along the circumferential direction. The connecting flange 102 is used to connect with the switch cabinet housing 20, further stabilize the installation of the switch cabinet pressure relief device 10 and the switch cabinet housing 20, and ensure good sealing of the pressure relief channel. Exemplarily, the connecting flange 102 is connected to the switch cabinet housing 20 through a riveted member, and specifically a rivet is selected, which can achieve a flexible and stable connection effect by utilizing its own deformation or interference riveting.

[0038] The utility model also provides a switch cabinet, including a switch cabinet housing 20 and the switch cabinet pressure relief device 10 as described above. The switch cabinet pressure relief device 10 is arranged on the switch cabinet, which has a simple structure, is easy to install, and has higher safety.

[0039] Specifically, a pressure relief port is generally provided at the top of the switch cabinet housing 20, and the switch cabinet pressure relief device 10 is preferably fixed to the top of the switch cabinet housing 20. The bottom of the pressure relief frame 100 is fixedly connected to the top of the switch cabinet housing 20 to connect the pressure relief port and the pressure relief channel, which can effectively and directly cooperate with the flow trajectory of the high-temperature and high-pressure airflow and release it, thereby improving the pressure relief efficiency and safety.

[0040] Furthermore, a plurality of pressure relief ports are provided on the switch cabinet housing 20, and a switch cabinet pressure relief device 10 is respectively provided at each pressure relief port; a plurality of cabinet compartments 21 are provided inside the switch cabinet housing 20, which can be used as a busbar room, a circuit breaker room and a cable room, etc., respectively, and each cabinet compartment 21 is respectively provided with at least one pressure relief port. Correspondingly, the switch cabinet includes a plurality of switch cabinet pressure relief devices 10, and the switch cabinet pressure relief devices 10 are arranged one-to-one with the pressure relief ports, and each pressure relief channel is respectively connected to the interior of one of the cabinet compartments 21. When high-temperature and high-pressure gas is generated due to short circuit or the like, the pressure can be relieved from the top through independent pressure relief channels, thereby ensuring the safety of the surrounding environment and lines of the switch cabinet, and preventing the mutual influence and interference between multiple functional areas of the switch cabinet from further expanding the potential safety hazards.

[0041] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. The switch cabinet pressure relief device is characterized by: include: A pressure relief frame (100) and a pressure relief cover (200) arranged on the top of the pressure relief frame (100), wherein a pressure relief channel communicating with a pressure relief port of a switch cabinet housing (20) is formed in the pressure relief frame (100); One end of the pressure relief cover (200) is rotatably connected to the top of the pressure relief frame (100), the other end of the pressure relief cover (200) is provided with a second magnetic component, and a first magnetic component adapted to the second magnetic component is provided at a corresponding position on the top of the pressure relief frame (100).

2. The switch cabinet pressure relief device according to claim 1, characterized in that: The first magnetic component is arranged on the top of the pressure relief frame (100), and the second magnetic component is arranged on a side of the pressure relief cover (200) facing the pressure relief frame (100).

3. The switch cabinet pressure relief device according to claim 1, characterized in that: One end of the pressure relief cover (200) is connected to the top of the pressure relief frame (100) via a hinge (220), and the pressure relief cover (200) can rotate at an angle less than 90°.

4. The switch cabinet pressure relief device according to claim 1, characterized in that: The pressure relief frame (100) is formed by a plurality of pipeline side plates (101) connected end to end to form the pressure relief channel, and the pressure relief cover (200) is arranged to fit the side surfaces of the plurality of pipeline side plates (101) facing the pressure relief frame (100).

5. The switch cabinet pressure relief device according to claim 4, characterized in that: A sealing ring is circumferentially arranged at the top of the pressure relief frame (100), and the pressure relief cover (200) abuts against the sealing ring.

6. The switch cabinet pressure relief device according to claim 1, characterized in that: A connecting flange (102) is provided at the bottom of the pressure relief frame (100) along the circumferential direction, and the connecting flange (102) is used for fixed connection with the switch cabinet housing (20).

7. The switch cabinet pressure relief device according to any one of claims 1 to 6, characterized in that: The first magnetic component comprises a plurality of first magnetic members (121) spaced apart at the top of the pressure relief frame (100), and the second magnetic component comprises a plurality of second magnetic members (210) spaced apart at the other end of the pressure relief cover (200), and the first magnetic members (121) are magnetically connected to the second magnetic members (210) in a one-to-one correspondence.

8. A switch cabinet, characterized in that: It comprises a switch cabinet housing (20) and a switch cabinet pressure relief device according to any one of claims 1 to 7.

9. The switch cabinet according to claim 8, characterized in that: The top of the switch cabinet housing (20) is provided with a pressure relief port, and the bottom of the pressure relief frame (100) is fixedly connected to the top of the switch cabinet housing (20).

10. The switch cabinet according to claim 8, characterized in that: The switch cabinet housing (20) is provided with a plurality of pressure relief ports, each of which is provided with a corresponding switch cabinet pressure relief device; the switch cabinet housing (20) is provided with a plurality of cabinet compartments (21), each of which is provided with at least one pressure relief port.

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