Pressure relief device of switch cabinet

Abstract

The utility model discloses a switch cabinet pressure relief device, which comprises a switch cabinet body, the top of the switch cabinet body is communicated with a pressure relief shell, and the bottom of the inner side of the pressure relief shell is fixedly provided with an accommodating shell; according to the utility model, through the air pressure sensor installed on the inner wall of the switch cabinet body, the air pressure in the switch cabinet body can be detected, when the air pressure value to be detected exceeds the preset value of the PLC controller, the PLC controller starts the winch to wind the cable wound on the roller of the winch, so that the cable pulls the rubber disc in the accommodating shell to rise through the hanging lug; when the air pressure sensor fails, the air pressure in the switch cabinet body pushes the rubber disc in the accommodating shell, so that a plurality of guide rods on the top surface of the rubber disc compress springs sleeving the surfaces of the guide rods until the first pressure relief channel is communicated with the second pressure relief channel of the accommodating shell, and the air pressure in the switch cabinet body pushes the rubber disc in the accommodating shell until the first pressure relief channel is communicated with the second pressure relief channel of the accommodating shell; and the pressure relief nozzle releases the air pressure of the switch cabinet body, so that the purpose of pressure relief of the switch cabinet body is achieved.

Description

Technical Field

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

[0002] Switchgear is a kind of switchgear suitable for electrical occasions. Its main function is to open, close, control and protect in the process of power generation, transmission, distribution and power conversion in the power system. It is mainly used in various occasions such as power plants, factories, mines and residential areas. It has a large number of electronic components inside, which will generate a lot of heat when working. When working normally, this heat will be dissipated through the heat dissipation holes on the switchgear cabinet. However, once the internal components of the switchgear fail, a lot of heat and pressure will be generated. The heat dissipation holes on the switchgear cabinet cannot quickly release the energy inside the cabinet, which may cause the risk of explosion of the switchgear, bringing huge safety hazards and economic losses to the switchgear.

[0003] After searching, the publication number CN215185209U discloses a switch cabinet pressure relief device, including a switch cabinet, the upper end of the switch cabinet is installed with a pressure relief housing through an installation guide mechanism, the upper ends of the switch cabinet are provided with sound and light alarms, the upper side of the pressure relief housing is provided with a plurality of sleeves, the lower end of the sleeve is movably provided with a spring rod, the lower end of the spring rod is connected with a protection plate, the protection plate is provided with a second electromagnet, the front and rear sides of the switch cabinet are provided with a cooling fan, the outer end of the cooling fan is provided with a heat dissipation protection net on the pressure relief housing, the left inner wall of the switch cabinet is provided with a temperature sensor, the right inner wall of the switch cabinet is provided with a pressure sensor, and the lower side of the pressure sensor is provided with a fan on the inner wall of the switch cabinet. This device can greatly improve the pressure relief effect during pressure relief, and at the same time can ensure the safety of the pressure relief device itself, and is more practical.

[0004] However, the above solution requires a pressure sensor as a triggering component for pressure relief. When the pressure sensor fails, the switch cabinet cannot relieve pressure autonomously, which poses certain safety hazards.

[0005] To this end, a switch cabinet pressure relief device is proposed, which has the advantage of reliable installation of the pressure relief mechanism, thereby solving the problems in the above-mentioned background technology. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a switch cabinet pressure relief device.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a switch cabinet pressure relief device, comprising a switch cabinet body, the top of the switch cabinet body is connected to a pressure relief shell, and a containing shell is fixedly installed on the bottom of the inner side of the pressure relief shell, a containing cavity connected to the switch cabinet body is opened inside the containing shell, and a rubber disc is arranged on the bottom of the inner side of the containing cavity, a plurality of guide rods are fixedly installed on the top of the rubber disc, and a spring is sleeved on the surface of each guide rod, and the top end of each guide rod extends to the outside of the pressure relief shell, and a winch is fixedly installed on the top of the pressure relief shell by bolts, A cable is wound around the drum of the winch, a hanging ear is provided at the center of the top surface of the rubber disc, and the hanging ear is connected to the cable of the winch, an air pressure sensor is fixedly installed on the inner wall surface of the switch cabinet body, a PLC controller is fixed at the edge of the top surface of the switch cabinet body, and the output end of the PLC controller is electrically connected to the winch, the air pressure sensor is electrically connected to the PLC controller, both sides of the upper part of the pressure relief shell are connected to pressure relief nozzles, a first pressure relief channel is opened inside the rubber disc, and a second pressure relief channel is opened on the upper inner side of the containing shell corresponding to the first pressure relief channel.

[0008] As a further description of the above technical solution: a wind speed sensor is fixedly installed on the inner wall surface of the pressure relief nozzle, and the wind speed sensor is electrically connected to the PLC controller.

[0009] As a further description of the above technical solution: the first pressure relief channel and the second pressure relief channel are both L-shaped structures, the bottom surface of the rubber disc is provided with a circular groove corresponding to the first pressure relief channel, and the inner wall surface of the accommodating cavity is provided with a horn groove corresponding to the second pressure relief channel.

[0010] As a further description of the above technical solution: two first pressure relief channels are opened in the rubber disk, and the two first pressure relief channels are symmetrical about the vertical center line of the rubber disk.

[0011] As a further description of the above technical solution: two second pressure relief channels are opened at the upper inner side of the containment shell, and the two second pressure relief channels are symmetrical about the vertical center line of the containment shell.

[0012] As a further description of the above technical solution: circular holes are provided on the top surface and the bottom surface of the containing shell, and the circular holes are connected to the containing cavity.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, an air pressure sensor is installed on the inner wall of the switch cabinet body to detect the air pressure inside the switch cabinet body. When the air pressure value to be detected exceeds the preset value of the PLC controller, the PLC controller starts the winch to reel in the cable wound on its drum, so that the cable pulls the rubber disc in the containment shell to rise through the hanging ear until the first pressure relief channel of the rubber disc is connected with the second pressure relief channel of the containment shell. When the air pressure sensor fails, the air pressure inside the switch cabinet body pushes the rubber disc in the containment shell, causing several guide rods on the top surface of the rubber disc to compress the springs sleeved on the surface until the first pressure relief channel is connected with the second pressure relief channel of the containment shell, and the air pressure of the switch cabinet body is released by the pressure relief nozzle, so as to achieve the purpose of pressure relief of the switch cabinet body. Compared with the existing pressure relief device, the pressure relief capability can be maintained after the sensor fails, thereby avoiding the situation that the switch cabinet body cannot be relieved due to the failure of the sensor, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a switch cabinet pressure relief device of the utility model;

[0016] Figure 2 This is a top view of a rubber disc of a switch cabinet pressure relief device of the utility model;

[0017] Figure 3 The utility model is a schematic diagram of a containment shell structure of a switch cabinet pressure relief device.

[0018] Legend:

[0019] 1. Switch cabinet body; 2. Air pressure sensor; 3. PLC controller; 4. Pressure relief shell; 5. Winch; 6. Container shell; 7. Rubber disc; 8. First pressure relief channel; 9. Second pressure relief channel; 10. Pressure relief nozzle; 11. Wind speed sensor; 12. Guide rod; 13. Spring; 14. Hanging ear; 15. Container chamber. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] According to an embodiment of the utility model, a switch cabinet pressure relief device is provided.

[0022] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-3As shown, a switch cabinet pressure relief device according to an embodiment of the utility model comprises a switch cabinet body 1, the top of the switch cabinet body 1 is connected with a pressure relief shell 4, and a containing shell 6 is fixedly installed at the bottom of the inner side of the pressure relief shell 4, a containing cavity 15 which is connected with the switch cabinet body 1 is provided inside the containing shell 6, and a rubber disc 7 is provided at the bottom of the inner side of the containing cavity 15, a plurality of guide rods 12 are fixedly installed on the top of the rubber disc 7, and a spring 13 is sleeved on the surface of each guide rod 12, and the top end of each guide rod 12 extends to the outside of the pressure relief shell 4, a winch 5 is fixedly installed on the top of the pressure relief shell 4 by bolts, and a cable is wound around the drum of the winch 5, a hanging ear 14 is provided at the center of the top surface of the rubber disc 7, and the hanging ear 14 is connected to the cable of the winch 5, and the inner side of the switch cabinet body 1 is provided with a plurality of guide rods 12 which are connected with the switch cabinet body 1. An air pressure sensor 2 is fixedly mounted on the wall, a PLC controller 3 is fixed on the edge of the top surface of the switch cabinet body 1, and the output end of the PLC controller 3 is electrically connected to the winch 5, the air pressure sensor 2 is electrically connected to the PLC controller 3, both sides of the upper part of the pressure relief shell 4 are connected with pressure relief nozzles 10, a first pressure relief channel 8 is opened inside the rubber disc 7, and a second pressure relief channel 9 is opened on the upper inner side of the accommodating shell 6 corresponding to the first pressure relief channel 8. The control mode of the utility model is automatically controlled by the PLC controller 3, and the control circuit of the PLC controller 3 can be realized by simple programming by technicians in this field. The provision of power supply is also common knowledge in this field, and the utility model is mainly used to protect mechanical devices, so the utility model does not explain the control mode and circuit connection in detail;

[0023] In one embodiment, a wind speed sensor 11 is fixedly installed on the inner wall surface of the pressure relief nozzle 10, and the wind speed sensor 11 is electrically connected to the PLC controller 3. Through the setting of the wind speed sensor 11, when the air pressure sensor 2 detects that the air pressure inside the switch cabinet body 1 increases, if the cable of the winch 5 fails to pull the rubber disc 7 to the upper part of the accommodating chamber 15 in time, that is, the first pressure relief channel 8 and the second pressure relief channel 9 are in a disconnected state, and the wind speed sensor 11 does not detect the airflow of the pressure relief nozzle 10, the winch 5 is started again through the PLC controller 3 to reel in the cable, so as to achieve the purpose of connecting the first pressure relief channel 8 and the second pressure relief channel 9, thereby providing protection for the pressure relief of the switch cabinet body 1.

[0024] In one embodiment, the first pressure relief channel 8 and the second pressure relief channel 9 are both L-shaped structures, a circular groove is provided on the bottom surface of the rubber disk 7 corresponding to the first pressure relief channel 8, and a horn groove is provided on the inner wall surface of the accommodating chamber 15 corresponding to the second pressure relief channel 9. An entire pressure relief channel is formed by the first pressure relief channel 8 and the second pressure relief channel 9 to release the air pressure inside the switch cabinet body 1. The circular groove and the horn groove are provided to facilitate the connection between the first pressure relief channel 8 and the second pressure relief channel 9 and to increase the air pressure pushing effect.

[0025] In one embodiment, two first pressure relief channels 8 are provided in the rubber disk 7 , and the two first pressure relief channels 8 are symmetrical about the vertical center line of the rubber disk 7 . The provision of the two first pressure relief channels 8 can ensure a pressure relief effect.

[0026] In one embodiment, two second pressure relief channels 9 are opened at the upper inner side of the containment shell 6, and the two second pressure relief channels 9 are symmetrical about the vertical center line of the containment shell 6. The arrangement of the two second pressure relief channels 9 can ensure the pressure relief effect.

[0027] In one embodiment, circular holes are provided on the top and bottom surfaces of the accommodating shell 6 , and the circular holes are connected to the accommodating cavity 15 . The circular holes are provided to connect to the switch cabinet body 1 on the one hand, and to make way for the guide rod 12 on the other hand.

[0028] Working principle:

[0029] When in use, firstly, the pressure relief shell 4 is connected to the opening at the top of the switch cabinet body 1. When the air pressure inside the switch cabinet body 1 increases, the air pressure sensor 2 installed on the inner wall of the switch cabinet body 1 is used to detect the air pressure inside the switch cabinet body 1. When the air pressure value to be detected exceeds the preset value of the PLC controller 3, the PLC controller 3 starts the winch 5 to reel in the cable wound on its drum, so that the cable pulls the rubber disc 7 in the containment shell 6 to rise through the hanging ear 14 until the first pressure relief channel 8 of the rubber disc 7 and the second pressure relief channel 8 of the containment shell 6 are connected. When the air pressure sensor 2 fails, the air pressure inside the switch cabinet body 1 pushes the rubber disc 7 in the accommodating shell 6, causing the several guide rods 12 on the top surface of the rubber disc 7 to compress the spring 13 sleeved on the surface thereof, until the first pressure relief channel 8 is connected with the second pressure relief channel 9 of the accommodating shell 6, and the air pressure of the switch cabinet body 1 is released by the pressure relief nozzle 10 to achieve the purpose of pressure relief. After the pressure relief is completed, the spring 13 on the surface of the guide rod 12 naturally stretches, so that the rubber disc 7 is reset to the bottom of the accommodating chamber 15, so as to facilitate the next pressure relief of the switch cabinet body.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A switch cabinet pressure relief device, comprising a switch cabinet body (1), characterized in that: The top of the switch cabinet body (1) is connected to a pressure relief shell (4), and a housing shell (6) is fixedly installed on the bottom of the inner side of the pressure relief shell (4). A housing cavity (15) connected to the switch cabinet body (1) is provided inside the housing shell (6), and a rubber disk (7) is arranged on the bottom of the inner side of the housing cavity (15). A plurality of guide rods (12) are fixedly installed on the top of the rubber disk (7), and a spring (13) is sleeved on the surface of each guide rod (12), and the top end of each guide rod (12) extends to the outside of the pressure relief shell (4). A winch (5) is fixedly installed on the top of the pressure relief shell (4) by bolts, and a cable is wound around the drum of the winch (5). The rubber disk (7) A hanging ear (14) is provided at the center of the circle of the top surface, and the hanging ear (14) is connected to the cable of the winch (5); an air pressure sensor (2) is fixedly installed on the inner wall surface of the switch cabinet body (1); a PLC controller (3) is fixed at the edge of the top surface of the switch cabinet body (1), and the output end of the PLC controller (3) is electrically connected to the winch (5); the air pressure sensor (2) is electrically connected to the PLC controller (3); both sides of the upper part of the pressure relief shell (4) are connected to pressure relief nozzles (10); a first pressure relief channel (8) is opened inside the rubber disk (7); and a second pressure relief channel (9) is opened on the upper inner side of the accommodating shell (6) corresponding to the first pressure relief channel (8).

2. A switch cabinet pressure relief device according to claim 1, characterized in that: A wind speed sensor (11) is fixedly mounted on the inner wall surface of the pressure relief nozzle (10), and the wind speed sensor (11) is electrically connected to the PLC controller (3).

3. A switch cabinet pressure relief device according to claim 1, characterized in that: The first pressure relief channel (8) and the second pressure relief channel (9) are both L-shaped structures; a circular groove is provided on the bottom surface of the rubber disk (7) corresponding to the first pressure relief channel (8); and a horn groove is provided on the inner wall surface of the accommodating cavity (15) corresponding to the second pressure relief channel (9).

4. A switch cabinet pressure relief device according to claim 1, characterized in that: Two first pressure relief channels (8) are provided in the rubber disc (7), and the two first pressure relief channels (8) are symmetrical about the vertical center line of the rubber disc (7).

5. A switch cabinet pressure relief device according to claim 1, characterized in that: Two second pressure relief channels (9) are provided at the upper inner portion of the containment shell (6), and the two second pressure relief channels (9) are symmetrical about the vertical center line of the containment shell (6).

6. A switch cabinet pressure relief device according to claim 1, characterized in that: The top surface and the bottom surface of the accommodating shell (6) are both provided with circular holes, and the circular holes are in communication with the accommodating cavity (15).

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