Inflatable high-voltage cabinet

Abstract

The utility model discloses an inflatable high-voltage cabinet, which relates to the technical field of high-voltage cabinets and comprises a cabinet body and an instrument shell. An air inlet pipe is arranged on the rear side face of the cabinet body, electric telescopic rods are fixed to the left side face and the right side face in the cabinet body, the bottom ends of the electric telescopic rods are connected with one side of the top face of a supporting plate, the supporting plate is slidably connected with the interior of the cabinet body, the instrument shell is fixed to the front side face of the cabinet body, and a display screen is installed on the top face of the front side face of the cabinet body. According to the inflatable high-voltage cabinet, the height of the supporting plate can be adjusted by adopting an electric telescopic rod, so that a worker can conveniently maintain and replace electric devices in the cabinet, and the safety of the worker is improved. And the locking frame and the locking groove are clamped and matched with a sealing ring to form a sealed air bin in the cabinet body to facilitate use, and the spring is matched with the pressing plate to perform automatic pressure relief processing when the pressure in the cabinet body is relatively large, so that the safety of the high-voltage cabinet is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas-insulated high-voltage switchgear technology, specifically a gas-insulated high-voltage switchgear. Background Technology

[0002] The gas-insulated switchgear combines air insulation with a sulfur hexafluoride gas compartment, resulting in a compact yet expandable design suitable for power distribution automation. Featuring a compact structure, flexible operation, and reliable interlocking, the gas-insulated switchgear provides satisfactory technical solutions for various applications (especially harsh environments) and diverse user requirements. The adoption of sensing technology and the latest protective relays, coupled with advanced technical performance and a lightweight, flexible assembly scheme, fully meets diverse user needs. Gas-insulated switchgear is suitable for small secondary substations, switching stations, prefabricated substations, residential communities, industrial and mining enterprises, and large shopping malls in power systems. It is particularly suitable for airports, subways, railways, and other applications with high power requirements. However, traditional gas-insulated switchgear, due to its mostly sealed structure, makes subsequent disassembly and maintenance very inconvenient. Therefore, we propose a gas-insulated high-voltage switchgear. Utility Model Content

[0003] The technical problem this utility model aims to solve is to overcome the existing defects and provide an inflatable high-voltage switchgear. It uses an electric telescopic rod to adjust the height of the support plate, facilitating the maintenance and replacement of electrical components inside the switchgear. The locking frame and locking groove are engaged with a sealing ring to create a sealed air chamber inside the switchgear for convenient use. A spring combined with a pressure plate automatically releases pressure when the internal pressure of the switchgear is high, thus improving the safety of the high-voltage switchgear and effectively solving the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an inflatable high-voltage switchgear, comprising a cabinet and an instrument housing;

[0005] Cabinet: An air intake pipe is provided on the rear side. Electric telescopic rods are fixed on both the left and right sides inside the cabinet. The bottom end of the electric telescopic rod is connected to one side of the top surface of the support plate. The support plate is slidably connected to the inside of the cabinet. The instrument housing is fixed on the front side of the cabinet. A display screen is installed on the top surface of the front side of the cabinet. A protective railing is hinged to the right side of the front side of the cabinet. A pressure relief unit is provided on the bottom surface of the support plate. A locking unit is provided inside the cabinet.

[0006] It also includes a controller, which is located inside the instrument housing. The input terminals of the electric telescopic rod and the display screen are electrically connected to the output terminal of the controller, and the input terminal of the controller is electrically connected to the output terminal of an external power source.

[0007] The electric telescopic rod is activated to lower the tray, making it easier for personnel to repair and replace the placed electrical components. The electric telescopic rod also raises the tray, creating an air chamber inside the cabinet. Sulfur hexafluoride can then be injected into the air chamber through the air inlet pipe to protect the electrical components.

[0008] Furthermore, the pressure relief unit includes a pressure relief hole, a rubber pad, a pressure plate, a spring, and a pressure relief box. The pressure relief box is fixed to the bottom surface of the support plate. A spring is fixed to the bottom surface inside the pressure relief box. The top end of the spring is connected to one side of the bottom surface of the pressure plate. The pressure plate is slidably connected to a groove inside the pressure relief box. A rubber pad is fixed to the top surface of the pressure plate. The pressure relief hole is opened on the surface of the pressure relief box. When the spring contracts, it causes the pressure plate to descend. The pressure relief hole can automatically relieve pressure when the gas pressure inside the inflation chamber is high. The rubber pad can increase the sealing of the connection to prevent air leakage.

[0009] Furthermore, the locking unit includes a bidirectional lead screw, a locking frame, a motor, a sealing ring, and a locking groove. There are two bidirectional lead screws, which are rotatably connected to the front and rear sides of the cabinet body, respectively. The motor is fixed to one end on the left side of the cabinet body, and the output shaft of the motor is connected to the left end of the bidirectional lead screw. The threads at both ends of the bidirectional lead screw are opposite. The bidirectional lead screw is threadedly connected to the screw hole on the surface of the locking frame. The sealing ring is fixed to the outer side of the tray. The locking groove is opened on the top surface of the tray. The input end of the motor is electrically connected to the output end of the controller. Starting the motor causes the locking frame to engage inside the locking groove, which increases the stability of the tray installation, while the sealing ring prevents air leakage from the inflation chamber.

[0010] Furthermore, it also includes a handle, a transparent window, and a protective plate. The protective plate is slidably connected to a groove inside the instrument housing. A transparent window is installed on the surface of the protective plate. The handle is installed at the top of the front side of the protective plate. The protective plate can protect the detection components inside the instrument housing, while the transparent window allows personnel to easily view the components.

[0011] Furthermore, it also includes a gas concentration sensor, a gas pressure sensor, and a flow sensor. The gas concentration sensor is installed on the right side inside the instrument housing, the gas pressure sensor is installed on the left side inside the instrument housing, and the flow sensor is installed on the outside of the air intake pipe. The output terminals of the gas concentration sensor, gas pressure sensor, and flow sensor are electrically connected to the input terminal of the controller. The gas concentration sensor and gas pressure sensor can detect the gas concentration and pressure inside the inflation chamber, and the flow sensor can adjust the inflation volume.

[0012] Furthermore, it also includes lighting fixtures, two of which are installed in placement slots on the left and right sides of the cabinet. The input of each lighting fixture is electrically connected to the output of the controller, and the lighting fixtures can provide illumination for personnel during maintenance and replacement.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This gas-filled high-voltage switchgear has the following advantages:

[0014] 1. The electric telescopic rod lowers the tray to facilitate the maintenance and replacement of electrical components. The electric telescopic rod also raises the tray to create an air chamber inside the cabinet. Sulfur hexafluoride can then be injected into the air chamber through the air inlet pipe to protect the electrical components.

[0015] 2. The spring retraction causes the pressure plate to descend, and the pressure relief hole can automatically release pressure when the gas pressure inside the inflation chamber is high. The rubber gasket can increase the sealing of the connection to prevent air leakage.

[0016] 3. By starting the motor, the locking bracket is engaged in the locking groove, which increases the stability of the tray installation. The sealing ring prevents air leakage from the inflation chamber. The gas concentration sensor and gas pressure sensor can detect the gas concentration and pressure inside the inflation chamber, and the flow sensor can adjust the inflation volume. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the locking unit structure of this utility model;

[0019] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 1 Cabinet, 2 Pressure Relief Unit, 21 Pressure Relief Hole, 22 Rubber Pad, 23 Pressure Plate, 24 Spring, 25 Pressure Relief Box, 3 Locking Unit, 31 Two-Way Lead Screw, 32 Locking Frame, 33 Motor, 34 Sealing Ring, 35 Locking Groove, 4 Air Inlet Pipe, 5 Electric Telescopic Rod, 6 Support Plate, 7 Instrument Housing, 8 Guardrail, 9 Display Screen, 10 Handle, 11 Transparent Window, 12 Protective Plate, 13 Gas Concentration Sensor, 14 Gas Pressure Sensor, 15 Lighting, 16 Flow Sensor, 17 Controller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 This embodiment provides a technical solution: an inflatable high-voltage switchgear, including a cabinet body 1 and an instrument housing 7;

[0023] Cabinet 1: An air intake pipe 4 is provided on the rear side. Electric telescopic rods 5 are fixed on both the left and right sides inside the cabinet 1. The bottom end of the electric telescopic rod 5 is connected to one side of the top surface of the support plate 6. The support plate 6 is slidably connected to the interior of the cabinet 1. The instrument housing 7 is fixed on the front side of the cabinet 1. A display screen 9 is installed on the top surface of the front side of the cabinet 1. A protective railing 8 is hinged to the right side of the front side of the cabinet 1. A pressure relief unit 2 is provided on the bottom surface of the support plate 6. The pressure relief unit 2 includes a pressure relief hole 21 and a rubber pad 22. The pressure plate 23, spring 24, and pressure relief box 25 are included. The pressure relief box 25 is fixed to the bottom surface of the support plate 6. The spring 24 is fixed to the bottom surface inside the pressure relief box 25. The top of the spring 24 is connected to one side of the bottom surface of the pressure plate 23. The pressure plate 23 is slidably connected to the plate groove inside the pressure relief box 25. A rubber pad 22 is fixed to the top surface of the pressure plate 23. A pressure relief hole 21 is opened on the surface of the pressure relief box 25. When the spring 24 contracts, it causes the pressure plate 23 to descend. In conjunction with the pressure relief hole 21, gas can be released from the air chamber. When the pressure is high, it automatically releases pressure, while the rubber pad 22 can increase the sealing of the connection to prevent air leakage. The cabinet 1 is equipped with a locking unit 3, which includes a two-way lead screw 31, a locking frame 32, a motor 33, a sealing ring 34, and a locking groove 35. There are two two-way lead screws 31, which are rotatably connected to the front and rear sides of the cabinet 1. The motor 33 is fixed to one end of the left side of the cabinet 1. The output shaft of the motor 33 is connected to the left end of the two-way lead screw 31. The threads at both ends of the two-way lead screw 31 are opposite. The two-way lead screw 31 is threaded to the screw hole on the surface of the locking frame 32. The sealing ring 34 is fixed to the outer side of the tray 6. The locking groove 35 is opened on the top surface of the tray 6. The input end of the motor 33 is electrically connected to the output end of the controller 17. Starting the motor 33 causes the locking frame 32 to be inserted into the locking groove 35, which can increase the stability of the tray 6 installation. The sealing ring 34 can prevent air leakage in the inflation chamber.

[0024] The system also includes a controller 17, which is located inside the instrument housing 7. The input terminals of the electric telescopic rod 5 and the display screen 9 are electrically connected to the output terminal of the controller 17, which is also electrically connected to the output terminal of an external power supply. Activating the electric telescopic rod 5 lowers the tray 6 to facilitate the maintenance and replacement of the placed electrical components. Conversely, the electric telescopic rod 5 raises the tray 6, creating an inflation chamber inside the cabinet 1. Sulfur hexafluoride is then injected into the inflation chamber through the air inlet pipe 4 to protect the electrical components. The system also includes a handle 10, a transparent window 11, and a protective plate 12. The protective plate 12 is slidably connected to a groove inside the instrument housing 7. The transparent window 11 is installed on the surface of the protective plate 12. The handle 10 is installed at the top of the front side of the protective plate 12. The protective plate 12 protects the detection components inside the instrument housing 7. For easy inspection, it also includes a gas concentration sensor 13, a gas pressure sensor 14, and a flow sensor 16. The gas concentration sensor 13 is installed on the right side inside the instrument housing 7, the gas pressure sensor 14 is installed on the left side inside the instrument housing 7, and the flow sensor 16 is installed on the outside of the air inlet pipe 4. The output terminals of the gas concentration sensor 13, gas pressure sensor 14, and flow sensor 16 are electrically connected to the input terminal of the controller 17. The gas concentration sensor 13 and gas pressure sensor 14 can detect the gas concentration and pressure inside the inflation chamber, and the flow sensor 16 can adjust the inflation volume. It also includes a lighting lamp 15. There are two lighting lamps 15, which are installed in the placement slots on the left and right sides inside the cabinet 1, respectively. The input terminal of the lighting lamp 15 is electrically connected to the output terminal of the controller 17. The lighting lamp 15 can provide illumination for personnel to maintain and replace parts.

[0025] The working principle of the inflatable high-voltage switchgear provided by this utility model is as follows: First, the electric telescopic rod 5 is activated to drive the tray 6 to descend, facilitating personnel to repair and replace the placed electrical components. The lighting 15 provides illumination for personnel during repair and replacement. The electric telescopic rod 5 drives the tray 6 to rise, creating an inflation chamber with the inside of the cabinet 1. The motor 33 is activated, causing the locking frame 32 to engage with the locking groove 35, which increases the stability of the tray 6 installation. The sealing ring 34 prevents air leakage from the inflation chamber. Sulfur hexafluoride is then injected into the inflation chamber through the air inlet pipe 4 to protect the electrical components. The gas concentration sensor 13 and gas pressure sensor 14 detect the gas concentration and pressure inside the inflation chamber. The flow sensor 16 adjusts the inflation volume. When the gas pressure inside the inflation chamber is too high, the spring 24 contracts, causing the pressure plate 23 to descend. This, combined with the pressure relief hole 21, automatically releases pressure when the gas pressure inside the inflation chamber is too high. The rubber pad 22 increases the sealing of the connection to prevent air leakage.

[0026] It is worth noting that the controller 17 disclosed in the above embodiments is model S7-200, while the gas concentration sensor 13 can be freely configured according to the actual application scenario. It is recommended to use a sulfur hexafluoride concentration sensor of model SF6-015. The gas pressure sensor 14 can be a gas pressure sensor of model JL-210, and the flow sensor 16 can be a gas flow sensor of model FC-260E. The controller 17 controls the operation of the motor 33, electric telescopic rod 5, display screen 9, gas concentration sensor 13, gas pressure sensor 14, lighting 15, and flow sensor 16 using methods commonly used in the prior art.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A gas-insulated high-voltage switchgear, characterized in that: Includes cabinet (1) and instrument housing (7); Cabinet (1): An air inlet pipe (4) is provided on the rear side. Electric telescopic rods (5) are fixed on both the left and right sides inside the cabinet (1). The bottom end of the electric telescopic rod (5) is connected to one side of the top surface of the tray (6). The tray (6) is slidably connected to the inside of the cabinet (1). The instrument housing (7) is fixed on the front side of the cabinet (1). A display screen (9) is installed on the top surface of the front side of the cabinet (1). A guardrail (8) is hinged on the right side of the front side of the cabinet (1). A pressure relief unit (2) is provided on the bottom surface of the tray (6). A locking unit (3) is provided inside the cabinet (1). The instrument also includes a controller (17), which is located inside the instrument housing (7). The input terminals of the electric telescopic rod (5) and the display screen (9) are electrically connected to the output terminal of the controller (17), and the input terminal of the controller (17) is electrically connected to the output terminal of an external power source.

2. The gas-insulated high-voltage switchgear according to claim 1, characterized in that: The pressure relief unit (2) includes a pressure relief hole (21), a rubber pad (22), a pressure plate (23), a spring (24), and a pressure relief box (25). The pressure relief box (25) is fixed to the bottom surface of the support plate (6). The bottom surface inside the pressure relief box (25) is fixed with a spring (24). The top of the spring (24) is connected to one side of the bottom surface of the pressure plate (23). The pressure plate (23) is slidably connected to the plate groove inside the pressure relief box (25). The top surface of the pressure plate (23) is fixed with a rubber pad (22). The pressure relief hole (21) is opened on the surface of the pressure relief box (25).

3. The gas-insulated high-voltage switchgear according to claim 1, characterized in that: The locking unit (3) includes a bidirectional lead screw (31), a locking frame (32), a motor (33), a sealing ring (34), and a locking groove (35). There are two bidirectional lead screws (31) and they are rotatably connected to the front and rear sides inside the cabinet (1). The motor (33) is fixed at one end of the left side of the cabinet (1). The output shaft of the motor (33) is connected to the left end of the bidirectional lead screw (31). The threads at both ends of the bidirectional lead screw (31) are opposite. The bidirectional lead screw (31) is threadedly connected to the screw hole on the surface of the locking frame (32). The sealing ring (34) is fixed on the outer side of the tray (6). The locking groove (35) is opened on the top surface of the tray (6). The input end of the motor (33) is electrically connected to the output end of the controller (17).

4. A gas-insulated high-voltage switchgear according to claim 1, characterized in that: It also includes a handle (10), a transparent window (11) and a protective plate (12), the protective plate (12) being slidably connected to a groove inside the instrument housing (7), the surface of the protective plate (12) being fitted with a transparent window (11), and the handle (10) being installed at the top of the front side of the protective plate (12).

5. A gas-insulated high-voltage switchgear according to claim 1, characterized in that: It also includes a gas concentration sensor (13), a gas pressure sensor (14), and a flow sensor (16). The gas concentration sensor (13) is installed on the right side inside the instrument housing (7), the gas pressure sensor (14) is installed on the left side inside the instrument housing (7), and the flow sensor (16) is installed on the outside of the air inlet pipe (4). The output terminals of the gas concentration sensor (13), the gas pressure sensor (14), and the flow sensor (16) are electrically connected to the input terminal of the controller (17).

6. A gas-insulated high-voltage switchgear according to claim 1, characterized in that: It also includes lighting lamps (15), there are two lighting lamps (15) installed in the placement slots on the left and right sides of the cabinet (1), and the input end of the lighting lamps (15) is electrically connected to the output end of the controller (17).

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