A prefabricated cabin type switch cabinet explosion-proof pressure relief device

Abstract

The application discloses a prefabricated cabin type switch cabinet explosion-proof pressure relief device, which comprises a door plate, a controller and a pressure relief assembly. The pressure relief assembly comprises an outer plate, an inner plate, a push rod, an electromagnet and a spring. The door plate is vertically arranged, and a pressure relief hole penetrating in the horizontal direction is arranged on the door plate. The outer plate is slidably sleeved in the pressure relief hole in the horizontal direction and is matched with the shape of the pressure relief hole. The inner plate is fixed to the inner side of the door plate. The two ends of the push rod are connected with the outer plate and the inner plate respectively. The electromagnet is sleeved on the push rod and is used for driving the push rod to stretch and retract. The spring is sleeved on the push rod and is connected with the electromagnet at one end and the inner plate at the other end. The controller is electrically connected with the electromagnet and is used for controlling the on-off of the electromagnet. When the internal pressure of the door plate is too large, the electromagnet can drive the push rod to stretch to make the pressure relief hole communicate with the outside for pressure relief. After each pressure relief, the spring can be used for resetting the outer plate to the state of being in sealing connection with the pressure relief hole.

Description

Technical Field

[0001] This application relates to the field of pressure relief device technology, and in particular to an explosion-proof pressure relief device for a prefabricated cabin-type switchgear. Background Technology

[0002] Currently, in most 10kV switchgear equipment in substations, when short-circuit faults, excessive temperatures, excessive currents, or reduced insulation of components occur, the electric arc releases a large amount of heat instantaneously, heating the air and causing it to expand. If the expanded gas cannot be discharged in time, it can lead to deformation, displacement, or even rupture of the high-voltage equipment. If the ventilation inside the switchgear is poor, the arc-heated air may damage the switchgear, causing protection trips and serious consequences such as busbar power outages. Therefore, switchgear is generally equipped with pressure relief devices.

[0003] Existing switchgear pressure relief devices typically use an openable cover that opens to release pressure when there is internal overpressure. However, this method does not automatically revert to its original position after the cover is closed, requiring replacement and re-fixing before reuse, which is inconvenient. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a prefabricated cabin-type switchgear explosion-proof pressure relief device to solve the problem that existing switchgear pressure relief devices are not convenient to reuse.

[0005] To achieve the above technical objectives, this application provides a prefabricated cabin-type switchgear explosion-proof pressure relief device, comprising: a device body, a door panel, a controller, and pressure relief components;

[0006] The door panel is vertically mounted on the main body of the device, and the door panel is provided with a pressure relief hole that runs through it in a horizontal direction;

[0007] The pressure relief assembly includes: an outer plate, an inner plate, a push rod, an electromagnet, and a spring;

[0008] The outer plate is slidably disposed within the pressure relief hole in the horizontal direction;

[0009] The inner plate is located inside the main body of the device;

[0010] The electromagnet is fixedly connected to the main body of the device.

[0011] The push rod is slidably sleeved on the electromagnet, with its front end connected to the outer plate and its rear end connected to the inner plate;

[0012] The front end of the push rod is provided with a magnetic pole;

[0013] One end of the spring is connected to the electromagnet, and the other end is connected to the inner plate;

[0014] The controller is electrically connected to the electromagnet and is used to control the on and off states of the electromagnet.

[0015] When energized, the electromagnet drives the push rod forward, causing the outer plate to slide outward until the pressure relief hole opens.

[0016] The spring is used to drive the push rod to move backward when the electromagnet is de-energized, so that the outer plate slides inward until the pressure relief hole is closed.

[0017] Furthermore, an electric fan is provided on the inner panel;

[0018] The electric fan is electrically connected to the controller.

[0019] Furthermore, it also includes pressure sensors;

[0020] The pressure sensor is electrically connected to the controller and is used to sense the real-time pressure value inside the main body of the device and send it to the controller.

[0021] The controller is used to energize the electromagnet when the real-time pressure value is greater than the preset pressure value, and after the electromagnet is energized for more than a preset time, it determines whether the real-time pressure value is greater than the preset pressure value. If so, it starts the electric fan.

[0022] Furthermore, it also includes a connecting cylinder;

[0023] The connecting cylinder is disposed on the main body of the device, and the middle part of the connecting cylinder is provided with a through cavity communicating with the interior of the main body of the device;

[0024] The door panel is disposed at the outer end of the cavity;

[0025] The pressure relief assembly is located within the passage cavity.

[0026] Furthermore, the door panel is slidably disposed at the outer end of the cavity in the vertical direction.

[0027] Furthermore, a magnetic block is provided on the door panel;

[0028] A coil magnet is installed inside the cavity;

[0029] The controller is electrically connected to the coil magnet;

[0030] The controller is used to control the direction of the current in the coil magnet so that the coil magnet generates an attractive force and a repulsive force on the magnetic block.

[0031] Furthermore, the magnetic block includes an upper magnetic block and a lower magnetic block;

[0032] The upper magnetic block and the lower magnetic block are respectively disposed at the top and bottom of the door panel;

[0033] The coil magnet includes an upper coil magnet and a lower coil magnet;

[0034] The upper coil magnet and the lower coil magnet are respectively disposed at the top and bottom of the cavity.

[0035] Furthermore, a toxic gas detector electrically connected to the controller is installed inside the passage cavity.

[0036] Furthermore, sealing strips are provided at the top and bottom of the door panel.

[0037] Furthermore, sliding strips are provided on both sides of the door panel;

[0038] The cavity is provided with a slide rail for the slider to slide in the vertical direction;

[0039] The door panel and the sliding strip are connected by a pressure release screw;

[0040] A chain connects the door panel and the connecting cylinder.

[0041] As can be seen from the above technical solution, this application provides a prefabricated compartment-type switchgear explosion-proof pressure relief device, including: a door panel, a controller, and a pressure relief assembly; the pressure relief assembly includes: an outer panel, an inner panel, a push rod, an electromagnet, and a spring; the door panel is vertically arranged, and a pressure relief hole is provided on the door panel in a horizontal direction; the outer panel is adapted to the shape of the pressure relief hole, and is slidably fitted into the pressure relief hole in a horizontal direction; the inner panel is fixed to the inner side of the door panel; the two ends of the push rod are respectively connected to the outer panel and the inner panel; the electromagnet is sleeved on the push rod and is used to drive the push rod to extend and retract; the spring is sleeved on the push rod, with one end connected to the electromagnet and the other end connected to the inner panel; the controller is electrically connected to the electromagnet and is used to control the electromagnet to turn on and off; the electromagnet is used to drive the push rod to extend when energized, so that the outer panel slides to separate from the pressure relief hole; the spring is used to pull the push rod to retract when the electromagnet is de-energized, so that the outer panel is sealed to the pressure relief hole. When the internal pressure of the door panel is too high, the pressure relief hole can be connected to the outside by the push rod driven by the electromagnet to relieve the pressure. After each pressure relief, the outer panel can be reset to a state of sealed connection with the pressure relief hole by the spring, which solves the problem that the pressure relief device of the existing switch cabinet is not convenient to reuse. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram of the door panel and pressure relief assembly of a prefabricated cabin-type switchgear explosion-proof pressure relief device provided in this application embodiment;

[0044] Figure 2 A schematic diagram of a push rod and electromagnet for a prefabricated cabin-type switchgear explosion-proof pressure relief device provided in this application embodiment;

[0045] Figure 3 This is a schematic diagram of the door panel and connecting cylinder of a prefabricated cabin-type switchgear explosion-proof pressure relief device provided in an embodiment of this application. Detailed Implementation

[0046] 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, not all, of the embodiments of this application. 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 claimed in this application.

[0047] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0049] Please see Figure 1 and Figure 2 The explosion-proof pressure relief device for a prefabricated cabin-type switchgear provided in this application embodiment includes: a device body (not shown in the figure), a door panel 10, a controller and a pressure relief assembly 20.

[0050] The door panel 10 is vertically mounted on the device body and sealed to the device body. The door panel 10 has a pressure relief hole 11 extending horizontally through it. The device body can be equipment such as a switch cabinet. The pressure relief hole 11 communicates with the interior of the device body.

[0051] The pressure relief assembly 20 includes an outer plate 21, an inner plate 22, a push rod 23, an electromagnet 24, and a spring 25. The outer plate 21 is shaped to match the pressure relief hole 11 and is slidably disposed within the pressure relief hole 11 in the horizontal direction; thus, when the outer plate 21 is located within the pressure relief hole 11, the two are sealed together; when the outer plate 21 slides out of the pressure relief hole 11, the inside and outside of the pressure relief hole 11 are connected. The inner plate 22 is located inside the main body of the device, that is, inside the door panel 10. The front end and rear end of the push rod 23 are respectively connected to the outer plate 21 and the inner plate 22, and the front end of the push rod 23 is provided with a magnetic pole opposite to that of the electromagnet 24 when energized. The electromagnet 24 is fixedly connected to the main body of the device and sleeved on the push rod 23, and is slidably connected to the push rod 23, used to drive the push rod 23 to move back and forth. The push rod 23 may have a magnetic pole opposite to that of the electromagnet 24 when energized, so that it moves forward under magnetic force after the electromagnet 24 is energized. The spring 25 is sleeved on the push rod 23, with one end connected to the electromagnet 24 and the other end connected to the inner plate 22.

[0052] In this embodiment, the controller can be located inside the switch cabinet or on the pressure relief assembly 20. The controller is electrically connected to the electromagnet 24 and is used to control the on / off state of the electromagnet 24. Specifically, the electromagnet 24 is electrically connected to a power supply, and the controller controls the on / off state of the electromagnet by controlling the start and stop of the power supply. Similarly, the power supply can be located inside the switch cabinet or on the pressure relief assembly 20.

[0053] When excessive pressure inside the switchgear necessitates pressure relief, the controller activates the power supply, energizing the electromagnet 24. This electromagnet 24 then moves the front end of the push rod 23, causing the outer plate 21 to slide outward until it connects with the pressure relief hole 11, opening it to transmit the internal pressure of the switchgear to the outside. Furthermore, when excessive pressure occurs within the main body of the device, the inner plate can also be pushed forward by the pressure, opening the outer plate 21 and achieving automatic pressure relief.

[0054] Spring 25 is used to drive push rod 23 to move backward when electromagnet 24 is de-energized, causing outer plate 21 to slide backward and close with pressure relief hole 11, thereby achieving automatic reset of the entire pressure relief device. It can be used directly the next time pressure relief is needed, without requiring reinstallation by personnel.

[0055] As a further improvement, an electric fan 30 can also be installed on the inner panel 22; the electric fan 30 is electrically connected to the controller. When the pressure relief hole 11 is open, the controller can simultaneously control the electric fan 30 to start, thereby achieving faster pressure relief for the switchgear.

[0056] In this embodiment, the controller can determine whether the electromagnet 24 is energized and whether the electric fan 30 is activated using a pressure sensor. The pressure sensor can be installed inside the main body of the device and electrically connected to the controller. It senses the real-time pressure value inside the door panel, i.e., inside the main body of the device, and sends it to the controller. The real-time pressure value is automatically updated over time.

[0057] The controller is used to energize the electromagnet 24 when the real-time pressure value is greater than the preset pressure value, thereby opening the pressure relief hole 11. After the electromagnet 24 is energized for a preset time, it determines whether the real-time pressure value is greater than the preset pressure value. If so, it starts the electric fan 30.

[0058] That is, after the pressure relief hole 11 has been open for a preset time, if the controller senses through the pressure sensor that the pressure inside the main body of the device is still greater than the preset pressure value, it will start the electric fan 30 to accelerate the pressure relief and allow the temperature and humidity inside the main body of the device to return to normal as soon as possible. The electric fan 30 can be set at the center of the inner plate 22.

[0059] In other embodiments, a connecting cylinder 40 is also included; the connecting cylinder 40 is disposed on the main body of the device, and a through cavity 41 communicating with the interior of the main body of the device is provided in the middle of the connecting cylinder 40; the door panel 10 is disposed at the outer end of the through cavity 41; and the pressure relief assembly 20 is located inside the through cavity 41.

[0060] The connecting cylinder 40 is long and narrow, and the internal cavity 41 can serve as a channel for the gas inside the main body of the device.

[0061] As a further improvement, the door panel 10 can be configured to slide vertically along the cavity 41. Specifically, the door panel 10, controller, fan 30, and pressure relief assembly 20 constitute a primary pressure relief assembly. In this embodiment, the sliding configuration of the door panel 10 allows it to constitute a secondary pressure relief assembly. When pressure relief is not required, the door panel 10 is sealed to the cavity 41. When the pressure inside the device body is too high, pressure is first relieved through the pressure relief assembly 20 and the fan 30. After a second preset time, if the controller senses through the pressure sensor that the real-time pressure value inside the device body is still greater than the preset pressure value, it can control the door panel 10 to slide, allowing the cavity 41 to directly connect to the outside, achieving faster pressure relief. The door panel 10 can be controlled to slide open by connecting it to a linear motor or a cylinder. Sealing strips 13 are provided at the top and bottom of the door panel 10 for sealing connection with the cavity 41 when pressure relief is not required.

[0062] In this embodiment, please refer to Figure 1 and Figure 3 A magnetic block 12 is provided on the door panel 10; a coil magnet 42 is provided in the cavity 41; the controller is electrically connected to the coil magnet 42; the controller is used to control the current direction of the coil magnet 42 so that the coil magnet 42 generates an attractive force and a repulsive force on the magnetic block 12.

[0063] Specifically, different current directions on the coil magnet 42 will result in different magnetic poles of the coil magnet 42, thereby generating attraction and repulsion forces on the magnetic block 12 according to different current directions. The sliding control of the door panel 10 is achieved through the combination of attraction and repulsion forces.

[0064] Furthermore, the magnetic block 12 may include an upper magnetic block and a lower magnetic block, respectively disposed at the top and bottom of the door panel 10. Correspondingly, the coil magnet 42 includes an upper coil magnet and a lower coil magnet, respectively disposed at the top and bottom of the through cavity 41.

[0065] In application, the upper coil magnet can be located above the upper magnetic block, and the lower coil magnet can be located below the lower magnetic block. When the door panel 10 needs to slide upwards, the upper coil magnet generates an attractive force on the upper magnetic block, while the lower coil magnet generates a repulsive force on the lower magnetic block, thus driving the door panel 10 to slide upwards. When the door panel 10 needs to slide downwards, the current direction of the upper and lower coil magnets can be adjusted accordingly. When pressure relief is not required, after the door panel 10 has slid to the appropriate position, the current to the upper and lower coil magnets can be disconnected, or the upper and lower coil magnets can provide attractive forces to the upper and lower magnetic blocks respectively. The magnitude of the magnetic force generated by the upper and lower coil magnets can be adjusted according to the current magnitude. The cooperation of the upper and lower coil magnets can counteract the influence of gravity, achieving sliding control of the door panel 10.

[0066] In other embodiments, a toxic gas detector electrically connected to the controller can be installed in the cavity 41 to detect whether there is toxic gas in the cavity 41 and feed the detected data back to the background. Before the pressure relief device is repaired, the background displays whether the gas inside the pressure relief channel contains toxic gases, thereby prompting the staff whether it is suitable for repair and preventing the toxic and harmful gases generated by high pressure from causing harm to the maintenance personnel.

[0067] In other embodiments, a battery and a solar panel may also be included. The battery powers various power supply components such as the controller and electromagnet 24. The solar panel is disposed on the outside of the door panel 10 and electrically connected to the battery for charging the battery via solar energy.

[0068] Further, please refer to Figure 1The door panel 10 is provided with slide bars 14 on both sides; the cavity 41 is provided with a slide rail (not shown in the figure) for the slide bars 41 to slide in the vertical direction; the door panel 10 and the slide bars 14 are connected by pressure release screws; a chain (not shown in the figure) is connected between the door panel 10 and the connecting cylinder 40.

[0069] Specifically, the door panel 10, slide bar 14, and slide rail can form a three-stage pressure relief mechanism. When the internal pressure of the device body is too high and cannot be relieved in time by the first and second stage pressure relief mechanisms, the internal pressure of the device body will impact the door panel 10. The pressure relief screw can be a screw made of nylon material, and its connection force can be set according to actual needs. When the pressure on the door panel 10 exceeds the connection force of the pressure relief screw, the pressure relief screw will disengage from the slide bar 14, causing the door panel 10 to separate from the slide bar 14, thereby opening the passage cavity 41 for accelerated pressure relief. It should be noted that the chain can prevent the door panel 10 from flying outward and injuring personnel when the pressure relief screw disengages from the slide bar 14. There can be two chains, one on each side of the door panel 10.

[0070] As a further improvement, a stainless steel mesh door can be installed inside the cavity 41 to prevent high-temperature and high-pressure metal debris from flying out of the cavity 41 and causing injury to people outside, while also serving to prevent dust and small animals from entering.

[0071] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although this application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A prefabricated cabin-type switchgear explosion-proof pressure relief device, characterized in that, include: The main body of the device, door panel, controller, connecting cylinder and pressure relief assembly; The door panel is vertically mounted on the main body of the device, and the door panel is provided with a pressure relief hole that runs through it in a horizontal direction; The pressure relief assembly includes: an outer plate, an inner plate, a push rod, an electromagnet, and a spring; The outer plate is slidably disposed within the pressure relief hole in the horizontal direction; The inner plate is located inside the main body of the device; The electromagnet is fixedly connected to the main body of the device. The push rod is slidably sleeved on the electromagnet, with its front end connected to the outer plate and its rear end connected to the inner plate; The front end of the push rod is provided with a magnetic pole; One end of the spring is connected to the electromagnet, and the other end is connected to the inner plate; The controller is electrically connected to the electromagnet and is used to control the electromagnet to be energized and de-energized. When energized, the electromagnet drives the push rod forward, causing the outer plate to slide outward until the pressure relief hole opens. The spring is used to drive the push rod to move backward when the electromagnet is de-energized, so that the outer plate slides inward until the pressure relief hole is closed. The connecting cylinder is disposed on the main body of the device, and the middle part of the connecting cylinder is provided with a through cavity communicating with the interior of the main body of the device; The door panel is slidably disposed at the outer end of the cavity in the vertical direction; The pressure relief assembly is located within the passage cavity; Sliding strips are provided on both sides of the door panel; The cavity is provided with a slide rail for the slider to slide in the vertical direction; The door panel and the sliding strip are connected by a pressure release screw; A chain connects the door panel and the connecting cylinder.

2. The explosion-proof pressure relief device for prefabricated cabin-type switchgear according to claim 1, characterized in that, An electric fan is installed on the inner panel; The electric fan is electrically connected to the controller.

3. The explosion-proof pressure relief device for prefabricated cabin-type switchgear according to claim 2, characterized in that, It also includes pressure sensors; The pressure sensor is installed inside the main body of the device and is electrically connected to the controller. It is used to sense the real-time pressure value inside the main body of the device and send it to the controller. The controller is used to energize the electromagnet when the real-time pressure value is greater than the preset pressure value, and after the electromagnet is energized for more than a preset time, it determines whether the real-time pressure value is greater than the preset pressure value. If so, it starts the electric fan.

4. The explosion-proof pressure relief device for prefabricated cabin-type switchgear according to claim 1, characterized in that, The door panel is equipped with magnetic blocks; A coil magnet is installed inside the cavity; The controller is electrically connected to the coil magnet; The controller is used to control the direction of the current in the coil magnet so that the coil magnet generates an attractive force and a repulsive force on the magnetic block.

5. The explosion-proof pressure relief device for prefabricated cabin-type switchgear according to claim 4, characterized in that, The magnetic block includes an upper magnetic block and a lower magnetic block; The upper magnetic block and the lower magnetic block are respectively disposed at the top and bottom of the door panel; The coil magnet includes an upper coil magnet and a lower coil magnet; The upper coil magnet and the lower coil magnet are respectively disposed at the top and bottom of the cavity.

6. The explosion-proof pressure relief device for prefabricated cabin-type switchgear according to claim 1, characterized in that, A toxic gas detector electrically connected to the controller is installed inside the passage cavity.

7. The explosion-proof pressure relief device for prefabricated cabin-type switchgear according to claim 1, characterized in that, Sealing strips are provided at the top and bottom of the outer panel.

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