A relief device for a metal clad switchgear

Abstract

This utility model relates to the field of central power cabinet technology and proposes a pressure relief device for a central power cabinet, comprising: a central power cabinet body; a fixed shell that is fixedly installed through the bottom of the central power cabinet body; a heat dissipation hole and a pressure relief port respectively opened on the top of the fixed shell; a fixed frame fixedly installed on the inner wall of the fixed shell; a sealing mechanism disposed inside the pressure relief port and mounted on the fixed frame; the sealing mechanism is lifted by the air pressure inside the central power cabinet body, so that the high-pressure gas inside the central power cabinet body can be discharged from the pressure relief port. At the same time as the pressure is released, the high-pressure gas inside the central power cabinet body will simultaneously enter the pressure relief chamber from the square opening and impact the piston lifting assembly. Then the piston lifting assembly drives the connecting rod and the air outlet to rise, so that the high-pressure gas can be discharged from the air outlet. This can reduce the pressure inside the central power cabinet body more quickly, reduce the risk of equipment damage caused by overpressure, and ensure that if one pressure relief channel fails, the other channel can still work normally.

Description

Technical Field

[0001] This utility model relates to the field of central power cabinet technology, and specifically to a pressure relief device for a central power cabinet. Background Technology

[0002] Medium-voltage switchgear, also known as metal-clad medium-voltage withdrawable switchgear, is a type of high-voltage power distribution equipment used to receive and distribute 3.6-12kV network power, and to control, protect, monitor, and measure power circuits. Medium-voltage switchgear is mainly used in power plants, for power transmission from small and medium-sized generators, for power receiving and transmission in secondary substations of power systems, for power distribution in industrial and mining enterprises, and for starting large high-voltage motors.

[0003] Chinese utility model patent CN221530779U discloses a pressure relief device for a switchgear cabinet. The cabinet top is covered with a pressure relief plate, and a guide assembly is provided between the pressure relief plate and the inner wall of the cabinet for the pressure relief plate to slide up and down. The inner wall of the cabinet is equipped with a pressure detection device, a temperature detection device, a controller, and an alarm device, all of which are electrically connected to the controller. This solution, by setting up the guide assembly, allows the pressure relief plate to slide upwards along the guide assembly under the impact of high-temperature, high-pressure gas in the circuit compartment, creating a pressure relief port between the pressure relief plate and the cabinet, rapidly releasing the high-temperature, high-pressure gas. This effectively prevents switchgear explosions and also effectively prevents damage to the equipment inside the cabinet caused by the high-temperature, high-pressure gas. After pressure relief is completed, under the action of gravity, the pressure relief plate slides downwards along the guide assembly to the closed cabinet.

[0004] However, the following problems were found in the implementation of the relevant technology: low safety and pressure relief efficiency, limited single-channel pressure relief capacity, and in the event of a failure, it may not be able to quickly and effectively discharge high-temperature and high-pressure gas, thereby affecting the safety of other compartments. Utility Model Content

[0005] This utility model proposes a central cabinet pressure relief device, which solves the problems of low safety and pressure relief efficiency, limited single-channel pressure relief capacity, and in the event of a malfunction, the inability to quickly and effectively discharge high-temperature and high-pressure gas, thereby affecting the safety of other compartments.

[0006] The technical solution of this utility model is as follows: a central cabinet pressure relief device, comprising:

[0007] Central cabinet body;

[0008] A fixed shell that penetrates and is fixedly installed at the bottom of the central cabinet body;

[0009] Heat dissipation holes and pressure relief ports are respectively opened on the top of the fixed shell;

[0010] A fixing bracket that is fixedly installed on the inner wall of the fixing shell;

[0011] A sealing mechanism is provided inside the pressure relief port, and the sealing mechanism is mounted on the fixed frame;

[0012] A positioning component is disposed on the fixed frame, and the top of the positioning component is connected to the sealing mechanism;

[0013] A square opening is provided on the rear side of the central cabinet body;

[0014] A pressure relief compartment is fixedly installed on the rear side of the central cabinet body, and the square opening is located on the inner side of the pressure relief compartment;

[0015] A piston lifting assembly is installed on the depressurization chamber;

[0016] Multiple connecting rods are fixedly installed on the piston lifting assembly, and the multiple connecting rods are arranged laterally among them;

[0017] A closed ball is fixedly installed at the bottom of the connecting rod;

[0018] And multiple air vents are provided on the top of the depressurization chamber, with the sealing ball located inside the air vents.

[0019] Preferably, two fixing frames are symmetrically fixedly installed on the inner top wall of the fixing shell, and the fixing frames are located below the heat dissipation holes, and a filter screen is fixedly installed on the inner wall of the fixing frames.

[0020] Preferably, the sealing mechanism includes a sealing plug disposed inside the pressure relief port, and a first spring is fixedly installed at the bottom of the sealing plug, with the bottom of the first spring connected to the fixing frame.

[0021] Preferably, the positioning component includes a fixing sleeve that is mounted through the fixing frame, an inverted T-bar is provided on the inner side of the fixing sleeve, and the bottom wall of the inverted T-bar is fixedly connected to the sealing plug through one side wall of the fixing sleeve.

[0022] Preferably, the fixing frame is provided with a buffer assembly, and the sealing plug is located inside the buffer assembly.

[0023] Preferably, the buffer assembly includes two I-beams symmetrically fixedly mounted on the fixed frame. A damper is fixedly mounted on the top of each of the two I-beams. A buffer frame is fixedly mounted on the top of the two dampers together. The sealing plug is located inside the buffer frame. A second spring is provided on the outer wall of the damper, and the second spring is located between the I-beam and the buffer frame.

[0024] Preferably, the piston lifting assembly includes two piston cylinders symmetrically installed through the top of the depressurization chamber, each piston cylinder having a piston rod on its inner side, and a connecting plate being fixedly installed on the top of both piston rods, with the connecting rod fixedly installed at the bottom of the connecting plate.

[0025] The working principle and beneficial effects of this utility model are as follows:

[0026] The air pressure inside the central cabinet lifts the sealing mechanism, allowing the high-pressure gas inside the cabinet to be discharged from the pressure relief port. At the same time, the high-pressure gas inside the central cabinet enters the pressure relief chamber through the square opening and impacts the piston lifting assembly. Then, the piston lifting assembly drives the connecting rod and the air outlet to rise, allowing the high-pressure gas to be discharged from the air outlet. This not only reduces the pressure inside the central cabinet more quickly, reducing the risk of equipment damage due to overpressure, but also ensures that if one pressure relief channel fails, the other channel can still work normally. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0029] Figure 2 This is a schematic diagram of the rear view structure proposed in this utility model;

[0030] Figure 3 A cross-sectional structural diagram of the central cabinet body is provided for this utility model;

[0031] Figure 4 A schematic diagram of the piston lifting assembly is provided for this utility model;

[0032] Figure 5 A schematic diagram of the buffer assembly proposed in this utility model is provided.

[0033] In the diagram: 1. Central cabinet body; 2. Fixed shell; 3. Ventilation holes; 4. Fixing frame; 5. Sealing plug; 6. First spring;

[0034] 7. Buffer assembly; 71. I-beam plate; 72. Damper; 73. Buffer frame; 74. Second spring;

[0035] 8. Positioning assembly; 81. Fixing sleeve; 82. Inverted T-bar;

[0036] 9. Square opening; 10. Depressurization chamber;

[0037] 11. Piston lifting assembly; 1101. Piston cylinder; 1102. Piston rod; 1103. Connecting plate;

[0038] 12. Connecting rod; 13. Sealing ball; 14. Air outlet; 15. Fixing frame; 16. Filter screen. Detailed Implementation

[0039] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0040] Example 1

[0041] Please see Figure 1 - Figure 5 The central switchgear pressure relief device includes:

[0042] Central cabinet body 1;

[0043] A fixed shell 2 is installed through and fixedly mounted at the bottom of the central cabinet body 1;

[0044] Heat dissipation holes 3 and pressure relief ports are respectively opened on the top of the fixed shell 2;

[0045] A mounting bracket 4 is fixedly installed on the inner wall of the fixed housing 2;

[0046] A sealing mechanism is installed inside the pressure relief port, and the sealing mechanism is mounted on the fixed frame 4;

[0047] A positioning component 8 is mounted on the fixed frame 4, and the top of the positioning component 8 is connected to the sealing mechanism;

[0048] A square opening 9 is located on the rear side of the central cabinet body 1;

[0049] The pressure relief chamber 10 is fixedly installed on the rear side of the central cabinet body 1, and the square opening 9 is located on the inner side of the pressure relief chamber 10.

[0050] Piston lifting assembly 11 installed on the depressurization chamber 10;

[0051] Multiple connecting rods 12 are fixedly installed on the piston lifting assembly 11, and the multiple connecting rods 12 are arranged horizontally among them;

[0052] A closed ball 13 is fixedly installed at the bottom of the connecting rod 12;

[0053] And multiple air outlets 14 are opened on the top of the depressurization chamber 10, and the sealing ball 13 is located inside the air outlet 14.

[0054] The pressure relief device for the central cabinet provided by this utility model can dissipate heat and relieve pressure inside the central cabinet body 1 through the heat dissipation holes 3 on the fixed shell 2. When the air pressure inside the central cabinet body 1 is high, the air pressure impacts the sealing mechanism and the positioning component 8, so that the sealing mechanism can rise stably with the cooperation of the positioning component 8. At the same time, the high pressure gas inside the central cabinet body 1 will also enter the pressure relief chamber 10 through the square opening 9 and impact the piston lifting component 11. Then, the piston lifting component 11 drives the connecting rod 12 and the air outlet 14 to rise, so that the high pressure gas inside the central cabinet body 1 can be quickly discharged from the pressure relief port and the air outlet 14 on the fixed shell 2. This can reduce the pressure inside the central cabinet body 1 more quickly, reduce the risk of equipment damage caused by overpressure, and ensure that if one pressure relief channel fails, the other channel can still work normally.

[0055] Furthermore, two fixing frames 15 are symmetrically fixedly installed on the inner top wall of the fixing shell 2, and the fixing frames 15 are located below the heat dissipation holes 3. A filter screen 16 is fixedly installed on the inner wall of the fixing frames 15.

[0056] Specifically, the filter 16 inside the fixed frame 15 can effectively prevent external dust and impurities from entering the equipment, reducing the damage to the equipment caused by dust in the air.

[0057] Furthermore, the sealing mechanism includes a sealing plug 5 disposed inside the pressure relief port, and a first spring 6 is fixedly installed at the bottom of the sealing plug 5. The bottom of the first spring 6 is connected to the fixing frame 4.

[0058] Specifically, during depressurization, the air pressure inside the central cabinet body 1 impacts the sealing plug 5 to rise, thereby causing the high-pressure gas in the central cabinet body 1 to be discharged from the middle of the sealing plug 5 and the pressure relief port on the fixed shell 2. After depressurization is completed, the sealing plug 5 is reset under the action of gravity and the first spring 6 and closes the pressure relief port.

[0059] Furthermore, the positioning component 8 includes a fixing sleeve 81 that is installed through the fixing frame 4. An inverted T-rod 82 is provided on the inner side of the fixing sleeve 81, and the bottom wall of the inverted T-rod 82 is fixedly connected to the sealing plug 5 through one side wall of the fixing sleeve 81.

[0060] Specifically, by fixing the sleeve 81 and the inverted T-rod 82, the stability of the sealing plug 5 during lifting and lowering can be guaranteed, so that the sealing plug 5 can be lifted and lowered stably.

[0061] Furthermore, the piston lifting assembly 11 includes two piston cylinders 1101 symmetrically installed through the top of the depressurization chamber 10. A piston rod 1102 is provided on the inner side of each of the two piston cylinders 1101. A connecting plate 1103 is fixedly installed on the top of the two piston rods 1102, and a connecting rod 12 is fixedly installed on the bottom of the connecting plate 1103.

[0062] Specifically, when the air pressure inside the central cabinet body 1 enters the depressurization chamber 10 through the square opening 9, the air pressure will impact the piston rod 1102 in the piston cylinder 1101, so that the piston rod 1102, in cooperation with the piston cylinder 1101, can drive the connecting plate 1103 to rise, thereby causing the closed ball 13 on the connecting rod 12 to move away from the air outlet 14 under the action of the connecting plate 1103, so that the high-pressure gas inside the central cabinet body 1 can be quickly discharged from the air outlet 14.

[0063] Example 2

[0064] Based on Embodiment 1, in this embodiment: a buffer assembly 7 is provided on the fixed frame 4, and the sealing plug 5 is located inside the buffer assembly 7. The buffer assembly 7 includes two I-beams 71 symmetrically fixedly installed on the fixed frame 4. A damper 72 is fixedly installed on the top of each of the two I-beams 71. A buffer frame 73 is fixedly installed on the top of the two dampers 72. The sealing plug 5 is located inside the buffer frame 73. A second spring 74 is provided on the outer wall of the damper 72. The second spring 74 is located between the I-beam 71 and the buffer frame 73.

[0065] The technical solution provided in this embodiment is as follows: when the sealing plug 5 descends and resets, the descending sealing plug 5 will impact the buffer frame 73, and then, through the second spring 74 on the I-beam plate 71 and with the cooperation of the damper 72, the buffer frame 73 and the sealing plug 5 are buffered, thereby preventing the sealing plug 5 from being worn or deformed due to impacting the positioning component 8 when descending, and thus extending the service life of the sealing plug 5.

[0066] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A centrally located cabinet pressure relief device, characterized in that, include: Central cabinet body (1); A fixed shell (2) is installed through and fixedly installed at the bottom of the central cabinet body (1); Heat dissipation holes (3) and pressure relief ports are respectively opened on the top of the fixed shell (2); A fixing bracket (4) is fixedly installed on the inner wall of the fixing shell (2); A sealing mechanism is provided inside the pressure relief port, and the sealing mechanism is mounted on the fixing frame (4); The positioning component (8) is provided on the fixed frame (4), and the top of the positioning component (8) is connected to the sealing mechanism; A square opening (9) is provided on the rear side of the central cabinet body (1). A pressure relief chamber (10) is fixedly installed on the rear side of the central cabinet body (1), and the square opening (9) is located inside the pressure relief chamber (10); Piston lifting assembly (11) installed on the depressurization chamber (10); Multiple connecting rods (12) are fixedly installed on the piston lifting assembly (11), and the multiple connecting rods (12) are arranged laterally; A closed ball (13) is fixedly installed at the bottom of the connecting rod (12); And multiple air outlets (14) opened on the top of the depressurization chamber (10), and the sealing ball (13) is located inside the air outlets (14).

2. The pressure relief device for the central cabinet according to claim 1, characterized in that: Two fixed frames (15) are symmetrically fixed on the inner top wall of the fixed shell (2), and the fixed frames (15) are located below the heat dissipation holes (3). A filter screen (16) is fixedly installed on the inner wall of the fixed frames (15).

3. The pressure relief device for the central cabinet according to claim 1, characterized in that: The sealing mechanism includes a sealing plug (5) disposed inside the pressure relief port. A first spring (6) is fixedly installed at the bottom of the sealing plug (5), and the bottom of the first spring (6) is connected to the fixing frame (4).

4. The central cabinet pressure relief device according to claim 3, characterized in that: The positioning component (8) includes a fixed sleeve (81) that is installed through the fixed frame (4). An inverted T-rod (82) is provided on the inner side of the fixed sleeve (81), and the bottom wall of the inverted T-rod (82) is fixedly connected to the sealing plug (5) through one side wall of the fixed sleeve (81).

5. The central cabinet pressure relief device according to claim 4, characterized in that: The fixing frame (4) is provided with a buffer assembly (7), and the sealing plug (5) is located inside the buffer assembly (7).

6. The pressure relief device for the central cabinet according to claim 5, characterized in that: The buffer assembly (7) includes two I-beams (71) symmetrically fixedly mounted on the fixed frame (4). A damper (72) is fixedly mounted on the top of each of the two I-beams (71). A buffer frame (73) is fixedly mounted on the top of the two dampers (72). The sealing plug (5) is located inside the buffer frame (73). A second spring (74) is provided on the outer wall of the damper (72). The second spring (74) is located between the I-beam (71) and the buffer frame (73).

7. The pressure relief device for the central cabinet according to claim 1, characterized in that: The piston lifting assembly (11) includes two piston cylinders (1101) symmetrically installed through the top of the depressurization chamber (10). A piston rod (1102) is provided on the inner side of each of the two piston cylinders (1101). A connecting plate (1103) is fixedly installed on the top of the two piston rods (1102), and the connecting rod (12) is fixedly installed on the bottom of the connecting plate (1103).

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