Solid insulation switch cabinet isolation device

Abstract

The invention belongs to the technical field of power equipment, and particularly relates to a solid insulation switch cabinet isolation device which comprises a control machine core assembly and an insulation isolation cover, the bottom end of the insulation isolation cover is fixedly connected with a bottom shell, the inner wall of the bottom shell is fixedly connected with a supporting plate, and the upper surface of the supporting plate is fixedly connected with a temperature regulation and control mechanism. The solid insulation switch cabinet isolation device not only has an active and accurate cooling function, but also has the functions of active regulation and control of internal and external air pressure and timely alarm of sealing failure, ensures that the internal and external pressure difference of the insulation isolation cover is uniform, avoids a micro-gap fault at the joint of the insulation isolation cover and the control machine core assembly, and improves the safety of the switch cabinet. The sealing protection effect of the insulating isolation cover is remarkably improved, the maintenance frequency of the isolation device is reduced, the extreme working condition adaptability of the isolation device is enhanced, the use reliability and the service life of the isolation device are prolonged, and the operation stability of a power system is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, and in particular relates to a solid-insulated switchgear isolation device. Background Technology

[0002] Solid-insulated switchgear isolating devices are the core components of switchgear. Existing isolating devices mainly use solid insulating materials such as epoxy resin and silicone rubber as the insulating medium, integrating contacts, operating mechanisms, and interlocking components to achieve medium-voltage circuit switching control and safety isolation. Together with grounding switches, they ensure maintenance safety. This device replaces traditional gas or oil-immersed insulation with fully enclosed solid insulation encapsulation. It is a key component for ensuring isolation safety and reliable operation and maintenance of medium-voltage power distribution systems. Especially during switchgear maintenance, the isolating device can ensure that the switchgear is in a de-energized state, ensuring the safety of personnel maintaining the switchgear.

[0003] The following problems exist when using solid-insulated switchgear isolation devices: First, when the isolation device is closed, factors such as contact resistance loss, current skin effect, and oxide film on the contact surface can all cause the contacts to heat up. The fully enclosed solid insulation encapsulation structure used in the isolation device has low heat dissipation efficiency, and heat is easy to accumulate inside, causing thermal expansion of the solid insulation material. Since the solid insulation material (such as epoxy resin) has a high coefficient of linear expansion, long-term thermal cycling will cause micro-gaps to appear at the connection between the insulation isolation cover and the control mechanism components, which will damage the sealing integrity of the isolation device and provide a channel for external moisture to enter. After the moisture enters, it forms condensation, which in turn causes subsequent insulation moisture problems, affecting the reliability and life of the isolation device. Second, existing isolation devices lack targeted active control mechanisms. In high-altitude areas (altitude > 1000m), low air pressure will cause a significant decrease in air insulation strength (8%-13% decrease for every 1000m increase in altitude). At the same time, the pressure difference between the normal pressure inside the isolation device and the low air pressure outside (the internal pressure is greater than the external pressure) can easily cause micro-gaps at the connection between the insulating isolation cover and the control mechanism components, which can damage the sealing integrity of the isolation device, seriously affect the reliability of the isolation device, and even threaten the safety of the power system operation. It also increases the maintenance frequency of the isolation device.

[0004] Therefore, we propose a solid-insulated switchgear isolation device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a solid-insulated switchgear isolation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a solid-insulated switchgear isolation device, comprising a control mechanism assembly and an insulating isolation cover, wherein a bottom shell is fixedly connected to the bottom end of the insulating isolation cover, a support plate is fixedly connected to the inner wall of the bottom shell, and a temperature control mechanism is fixedly connected to the upper surface of the support plate; A hollow block is fixedly connected to the inner wall of the vertical part of the bottom shell, and a pressure regulating mechanism is fixedly connected to the inner wall of the horizontal part of the bottom shell. The hollow block has three sealing and fixing holes on its outer wall, and a temperature sensor, a humidity sensor and a first air pressure sensor are respectively fixedly connected to the walls of the three sealing and fixing holes. The outer wall of the hollow block is fixedly connected to an air intake check valve, and the outer wall of the vertical part of the bottom shell is provided with an installation through hole that cooperates with the air intake check valve.

[0007] In the above-mentioned solid-insulated switchgear isolation device, the temperature control mechanism includes a metal coil fixedly connected to the upper surface of the support plate. The outlet end of the metal coil is fixedly connected to an exhaust one-way valve. The inlet end of the metal coil passes through the support plate and extends downward. A metal mesh is fixedly sleeved on the surface of the metal coil. Multiple semiconductor cooling chips are fixedly connected to the inner wall of the metal mesh.

[0008] In the aforementioned solid-insulated switchgear isolation device, a small fan for heat dissipation of multiple semiconductor cooling chips is fixedly connected to the inner wall of the side end of the metal mesh cylinder.

[0009] In the aforementioned solid-insulated switchgear isolation device, the air pressure regulating mechanism includes an inert gas box fixedly connected to the inner wall of the horizontal part of the bottom shell. An electric push rod is fixedly embedded in the side wall of the inert gas box. A moving block is fixedly connected to the moving end of the electric push rod. A sealing cover is fixedly sleeved on the outer wall of the moving block. The outer wall of the sealing cover is slidably connected to the inner wall of the inert gas box. A first one-way valve and a second one-way valve are fixedly connected to the outer wall of the inert gas box. Both the inlet end of the first one-way valve and the outlet end of the second one-way valve are fixedly connected to a bend pipe. One end of the two bend pipes is fixedly connected to a three-way reversing solenoid valve. The side port of the three-way reversing solenoid valve passes through the inner wall of the hollow block and is fixedly connected to the inner cavity of the hollow block. A miniature air pump and a control component are fixedly connected to the upper surface of the inert gas box. The inlet end of the miniature air pump is fixedly connected to the inner cavity of the hollow block. The outlet end of the miniature air pump is fixedly connected to a guide pipe. The outlet end of the guide pipe is fixedly connected to the inlet end of the metal coil.

[0010] In the aforementioned solid-insulated switchgear isolation device, the control component includes a PLC controller and a fixing ring fixedly connected to the upper surface of the inert gas box. A second pressure sensor is fixedly connected to the inner wall of the fixing ring. The output terminal of the PLC controller is electrically connected to a connecting wire, and the connecting end of the connecting wire is electrically connected to an alarm.

[0011] In the above-mentioned solid-insulated switchgear isolation device, the air inlet end of the air inlet one-way valve is fixedly connected to a first air pipe, and the air inlet end of the first air pipe is fixedly connected to a three-port air inlet connecting pipe that matches the internal cavity of the insulating isolation cover.

[0012] In the above-mentioned solid-insulated switchgear isolation device, the exhaust one-way valve is fixedly connected to a second air pipe at its outlet end, and the outlet end of the second air pipe is fixedly connected to a three-port air outlet connecting pipe that matches the internal cavity of the insulating isolation cover.

[0013] In the above-mentioned solid-insulated switchgear isolation device, the outer wall of the inert gas box near the electric push rod is provided with multiple vent holes, and the side of the inert gas box away from the electric push rod is provided with an injection hole, and the wall of the injection hole is fixedly connected with a gas nozzle.

[0014] Compared with existing technologies, the advantages of a solid-insulated switchgear isolation device are: 1. Through the installation of temperature sensors, PLC controllers, temperature control mechanisms, and micro air pumps, the solid-insulated switchgear operates by using temperature sensors to monitor the temperature of the inert gas inside the insulating enclosure in real time and feeding it back to the PLC controller. When the temperature exceeds the limit, the micro air pump drives gas circulation, the semiconductor cooling chip cools the gas through the metal coil, and a small fan assists in heat dissipation, quickly removing the accumulated heat inside. This prevents the insulating enclosure from developing micro-gaps due to thermal expansion, thus preventing moisture intrusion and condensation. This mechanism enables the isolation device to have an active and precise cooling function, effectively avoiding the risk of sealing failure caused by overheating expansion of the insulating enclosure, significantly improving the sealing and protection effect of the insulating enclosure, and enhancing the extreme operating condition adaptability of the isolation device, extending its reliability and service life.

[0015] 2. Through the setup of a first pressure sensor, a second pressure sensor, a PLC controller, and a pressure regulation mechanism, the second pressure sensor senses the external ambient air pressure in real time, converts the detection result into an electrical signal, and sends it to the PLC controller. The PLC controller automatically sets this pressure value as the internal and external air pressure balance reference threshold. The first pressure sensor continuously detects the air pressure inside the hollow block. Since the hollow block is connected to the insulating shield through an inlet one-way valve, a first air pipe, and an inlet three-port connecting pipe, the detection result of the first pressure sensor can accurately reflect the actual air pressure inside the insulating shield. Its detection data is also presented in [the format of the first pressure sensor]. The electrical signal is fed back to the PLC controller, which has a built-in differential pressure compensation algorithm. It compares the two sets of air pressure data in real time. When the difference exceeds ±3kPa, the air pressure regulation process is immediately initiated. This mechanism enables the isolation device to actively regulate the internal and external air pressure, making it particularly suitable for high-altitude extreme environments. It can effectively compensate for the defect of the insulation strength of traditional isolation devices in low-pressure environments, ensure uniform pressure difference inside and outside the insulation isolation cover, avoid micro-gaps at the connection between the insulation isolation cover and the control mechanism components due to uneven pressure difference, reduce the maintenance frequency of the isolation device, improve its reliability, and ensure the stability of the power system operation.

[0016] 3. With the installed humidity sensor and alarm, when the solid-insulated switchgear is in operation, the humidity sensor detects the relative humidity inside the insulating enclosure in real time, with a detection accuracy of ±3%RH. It can sensitively detect trace moisture intrusion and provide early warning of condensation risks. The PLC controller triggers the alarm through the connecting wire. The alarm adopts a dual alarm mode of sound and light, issuing a conspicuous alarm to ensure that the staff can maintain the switchgear in a timely manner and avoid failures such as corrosion of internal metal conductive parts due to condensation and deterioration of insulation performance. After receiving the alarm, the staff controls the metal conductive structure inside the insulating enclosure to switch to the disconnect state through the control mechanism. At this time, the interlocking component of the control mechanism is automatically activated to prevent accidental reconnection during maintenance and ensure that the solid-insulated switchgear is in a safe state of complete power disconnection. This mechanism enables the isolation device to have a timely alarm function for sealing failure, enabling early detection and handling of faults, avoiding the escalation of faults, and ensuring the stability of power system operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a solid-insulated switchgear isolation device provided by the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the bottom shell portion of a solid-insulated switchgear isolation device provided by the present invention; Figure 3 This is a three-dimensional structural diagram of the bottom shell in a solid-insulated switchgear isolation device provided by the present invention; Figure 4 yes Figure 2A partially enlarged structural diagram; Figure 5 This is an enlarged structural schematic diagram of the second air pressure sensor part in a solid-insulated switchgear isolation device provided by the present invention; Figure 6 This is a three-dimensional structural diagram of the metal mesh cylinder portion in a solid-insulated switchgear isolation device provided by the present invention.

[0018] In the diagram: 1 Control mechanism assembly, 2 Insulating cover, 3 Bottom shell, 4 Support plate, 5 Temperature control mechanism, 51 Metal coil, 52 Exhaust check valve, 53 Metal mesh tube, 54 Semiconductor cooling chip, 6 Hollow block, 7 Pressure control mechanism, 71 Inert gas box, 72 Electric push rod, 73 Moving block, 74 Sealing cover, 75 First check valve, 76 Second check valve, 77 Bend, 78 Three-way reversing solenoid valve, 79 Miniature air pump, 710 Air guide pipe, 8 Control components, 81 PLC controller, 82 Fixing ring, 83 Second air pressure sensor, 84 Connecting wire, 85 Alarm, 9 Small fan, 10 Temperature sensor, 11 Humidity sensor, 12 First air pressure sensor, 13 Inlet check valve, 14 First air pipe, 15 Inlet three-port connecting pipe, 16 Second air pipe, 17 Outlet three-port connecting pipe, 18 Air nozzle. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-6 As shown, a solid-insulated switchgear isolation device includes a control mechanism assembly 1 and an insulating isolation cover 2. A bottom shell 3 is fixedly connected to the bottom end of the insulating isolation cover 2. A support plate 4 is fixedly connected to the inner wall of the bottom shell 3. A temperature control mechanism 5 is fixedly connected to the upper surface of the support plate 4. The temperature control mechanism 5 includes a metal coil 51 fixedly connected to the upper surface of the support plate 4. An exhaust one-way valve 52 is fixedly connected to the outlet end of the metal coil 51. The inlet end of the metal coil 51 passes through the support plate 4 and extends downward. A metal mesh cylinder 53 is fixedly sleeved on the surface of the metal coil 51. A plurality of semiconductor cooling chips 54 are fixedly connected to the inner wall of the metal mesh cylinder 53.

[0021] A hollow block 6 is fixedly connected to the inner wall of the vertical part of the bottom shell 3, and a pressure regulating mechanism 7 is fixedly connected to the inner wall of the horizontal part of the bottom shell 3. The pressure regulating mechanism 7 includes an inert gas box 71 fixedly connected to the inner wall of the horizontal part of the bottom shell 3. An electric push rod 72 is fixedly embedded in the side wall of the inert gas box 71. A moving block 73 is fixedly connected to the moving end of the electric push rod 72. A sealing cover 74 is fixedly sleeved on the outer wall of the moving block 73. The outer wall of the sealing cover 74 is slidably connected to the inner wall of the inert gas box 71. A first one-way valve 75 and a second one-way valve 76 are fixedly connected to the outer wall of the inert gas box 71. The inlet end of valve 75 and the outlet end of the second one-way valve 76 are both fixedly connected to a bend 77. The opposite ends of the two bends 77 are fixedly connected to a three-way reversing solenoid valve 78. The side port of the three-way reversing solenoid valve 78 passes through the inner wall of the hollow block 6 and is fixedly connected to the inner cavity of the hollow block 6. The upper surface of the inert gas box 71 is fixedly connected to a miniature air pump 79 and a control component 8. The inlet end of the miniature air pump 79 is fixedly connected to the inner cavity of the hollow block 6. The outlet end of the miniature air pump 79 is fixedly connected to a guide pipe 710. The outlet end of the guide pipe 710 is fixedly connected to the inlet end of the metal coil 51.

[0022] The control assembly 8 includes a PLC controller 81 and a fixing ring 82 fixedly connected to the upper surface of the inert gas box 71. A second pressure sensor 83 is fixedly connected to the inner wall of the fixing ring 82. The output terminal of the PLC controller 81 is electrically connected to a connecting wire 84, and the connecting end of the connecting wire 84 is electrically connected to an alarm 85.

[0023] The outer wall of the hollow block 6 has three sealing and fixing holes, and the walls of the three sealing and fixing holes are respectively fixedly connected to a temperature sensor 10, a humidity sensor 11 and a first air pressure sensor 12. The outer wall of the hollow block 6 is fixedly connected to an air intake one-way valve 13. The outer wall of the vertical part of the bottom shell 3 has an installation through hole that cooperates with the air intake one-way valve 13. The inner wall of the side end of the metal mesh cylinder 53 is fixedly connected to a small fan 9 for heat dissipation of multiple semiconductor cooling chips 54.

[0024] The intake end of the intake one-way valve 13 is fixedly connected to the first air pipe 14, and the intake end of the first air pipe 14 is fixedly connected to the intake three-port connecting pipe 15 that matches the internal cavity of the insulating isolation cover 2. The exhaust one-way valve 52 is fixedly connected to the exhaust end of the second air pipe 16, and the exhaust end of the second air pipe 16 is fixedly connected to the exhaust three-port connecting pipe 17 that matches the internal cavity of the insulating isolation cover 2. The outer wall of the inert gas box 71 near the electric push rod 72 has multiple vent holes, and the side of the inert gas box 71 away from the electric push rod 72 has an injection hole, and the wall of the injection hole is fixedly connected to an air nozzle 18.

[0025] The semiconductor cooling chip 54, electric push rod 72, three-way reversing solenoid valve 78, micro air pump 79 and small fan 9 are electrically connected to the output terminal of PLC controller 81 via wires; the second air pressure sensor 83, temperature sensor 10, humidity sensor 11 and first air pressure sensor 12 are electrically connected to the input terminal of PLC controller 81 via wires. The above-mentioned energized components and electrical connections are existing technologies and will not be described in detail here.

[0026] The operating principle of this invention is described as follows: During the production of the solid-insulated switchgear, the inlet three-port connecting pipe 15 and the outlet three-port connecting pipe 17 are first precisely connected to the internal cavity of the insulating isolation cover 2 to ensure that there is no leakage in the gas flow path. Then, one end of the first gas pipe 14 is sealed and connected to the inlet three-port connecting pipe 15, and the other end is fixedly connected to the inlet one-way valve 13. At the same time, one end of the second gas pipe 16 is sealed and connected to the outlet three-port connecting pipe 17, and the other end is firmly connected to the exhaust one-way valve 52, thus completing the assembly of the gas circulation pipeline. Afterwards, the gas is connected to the vacuum extraction equipment through the gas nozzle 18 to extract the hollow block 6, the insulating isolation cover 2, the metal coil 51, and the inert gas. The air inside the inert gas box 71 is used to ensure that there is no residual air or water vapor in each connected cavity, forming a high vacuum environment. Then, the vacuum extraction equipment is removed, and high-purity inert gas (such as helium) is injected into the above-mentioned connected cavities (insulating isolation cover 2, hollow block 6, inert gas box 71 and internal channel of metal coil 51) through the air nozzle 18. The inert gas can provide comprehensive anti-oxidation protection for the metal structures such as contacts and operating mechanisms located inside the insulating isolation cover 2, reducing the risk of increased contact resistance due to the formation of an oxide film on the metal structure. At the same time, the inert gas is chemically stable, non-conductive and non-flammable, which can further improve the insulation performance inside the insulating isolation cover 2. When the solid-insulated switchgear is in operation, the core structure inside the insulating isolation cover 2 is in the closed state. Due to factors such as contact resistance loss and current skin effect, the closed point continues to generate heat, and heat easily accumulates in the enclosed space. At the same time, the PLC controller 81 automatically controls the micro air pump 79 to be powered on and started. The micro air pump 79 draws inert gas from the hollow block 6 through the air inlet. The gas enters the metal coil 51 along the air guide pipe 710 and is injected into the interior of the insulating isolation cover 2 through the closed path composed of the exhaust one-way valve 52, the second air pipe 16 and the three-port connecting pipe 17. The inert gas carrying heat inside the insulating isolation cover 2 returns to the hollow block 6 through the return path composed of the three-port connecting pipe 15, the first air pipe 14 and the air inlet one-way valve 13, forming a continuous and stable inert gas circulation loop. During the circulation process, the temperature sensor 10 detects the temperature of the inert gas flowing through the hollow block 6 in real time, accurately reflects the actual temperature environment inside the insulating isolation cover 2, and converts the detection data into an electrical signal and transmits it to the PLC controller 81 in real time. If the detected temperature exceeds the preset temperature threshold of the PLC controller 81, which is scientifically set based on the thermal stability characteristics of solid insulating materials such as epoxy resin and the rated operating conditions of the switchgear, and is usually 10-15℃ lower than the critical temperature for thermal expansion of the insulating material to prevent irreversible deformation due to overheating, the PLC controller 81 immediately triggers multiple semiconductor cooling chips 54 and a small fan 9 to work synchronously. The cooling side of the semiconductor cooling chip 54 quickly conducts cold air through the metal mesh cylinder 53, reducing the wall temperature of the metal coil 51. The inert gas flowing through the metal coil 51 is quickly cooled to a safe range. The small fan 9 accelerates the airflow inside the metal mesh cylinder 53, quickly removing the heat generated by the heat dissipation side of the semiconductor cooling chip 54, ensuring continuous and efficient cooling by the semiconductor cooling chip 54, and preventing cooling failure due to insufficient heat dissipation. As efficiency decreases, the cooled inert gas returns to the interior of the insulating cover 2, which not only removes accumulated heat in time, but also evenly covers the surface of each heat-generating component through circulation, avoiding local high temperature concentration and further slowing down the aging rate of the insulation material. This completely prevents the insulating cover 2 from over-expanding due to heat accumulation, ensuring the sealing integrity of the connection between the insulating cover 2 and the control mechanism 1, blocking the intrusion channel of external moisture, preventing condensation failure inside, and ensuring the safe and stable operation of the solid insulation switchgear. This mechanism enables the isolation device to have an active and precise cooling function, effectively avoiding the risk of sealing failure caused by overheating expansion of the insulating cover 2, significantly improving the sealing protection effect of the insulating cover 2, and enhancing the extreme working condition adaptability of the isolation device, extending its reliability and service life. Meanwhile, the second air pressure sensor 83 (fixed to the inner wall of the fixing ring 82) senses the external air pressure in real time, converts the detection result into an electrical signal and sends it to the PLC controller 81. The PLC controller 81 automatically sets the air pressure value as the internal and external air pressure balance reference threshold. The first air pressure sensor 12 continuously detects the air pressure inside the hollow block 6. Since the hollow block 6 is connected to the insulating cover 2 through the air inlet one-way valve 13, the first air pipe 14 and the air inlet three-port connecting pipe 15, the detection result of the first air pressure sensor 12 can accurately reflect the actual air pressure inside the insulating cover 2. Its detection data is also fed back to the PLC controller 81 in the form of an electrical signal. The PLC controller 81 has a built-in differential pressure compensation algorithm and compares the two sets of air pressure data in real time. When the difference exceeds ±5kPa (set according to the air pressure attenuation characteristics of high-altitude environment), the air pressure regulation process is immediately started. If the internal air pressure detected by the first pressure sensor 12 is higher than the external air pressure detected by the second pressure sensor 83, the PLC controller 81 controls the moving end of the electric push rod 72 to retract. The electric push rod 72 drives the sealing cover 74 to move synchronously through the moving block 73, increasing the cavity space for storing inert gas in the inert gas box 71. At this time, the inert gas box 71 extracts excess inert gas from the hollow block 6 through the suction path composed of the first one-way valve 75, the bend 77, and the three-way reversing solenoid valve 78, reducing the internal air pressure of the insulating isolation cover 2 until the internal and external air pressures tend to be balanced. If the internal air pressure detected by the first pressure sensor 12 is lower than the external air pressure detected by the second pressure sensor 83, the PLC controller 81 synchronously controls the electric push rod 72 and the three-way reversing solenoid valve 78 to operate. The three-way reversing solenoid valve 78 changes its conduction direction, and the moving end of the electric push rod 72 extends forward, pushing the sealing cover 74 through the moving block 73. The moving sealing cover 74 reduces the storage space inside the inert gas box 71. The sealing cover 74 and the inner wall of the inert gas box 71 achieve leak-free sliding through a high-precision sealing structure, ensuring no leakage during gas capacity adjustment. The inert gas in the inert gas box 71 is precisely injected into the hollow block 6 through the injection path composed of the second one-way valve 76, the bend 77 and the three-way reversing solenoid valve 78, thereby increasing the internal air pressure of the insulating isolation cover 2 and achieving internal and external air pressure balance. This mechanism enables the isolation device to have the ability to actively regulate internal and external air pressure, which is especially suitable for high-altitude extreme environments. It can effectively make up for the defect of the insulation strength reduction of traditional isolation devices in low air pressure environments, ensure uniform pressure difference inside and outside the insulating isolation cover 2, avoid micro gaps at the connection between the insulating isolation cover 2 and the control core assembly 1 due to uneven pressure difference, reduce the maintenance frequency of the isolation device, improve its reliability, and ensure the stability of power system operation. When the solid-insulated switchgear is in operation, the humidity sensor 11 monitors the relative humidity inside the insulating cover 2 in real time. Its detection accuracy reaches ±5%RH, enabling it to sensitively detect trace amounts of moisture intrusion and provide early warning of condensation risks. If a gap forms at the connection between the insulating cover 2 and the control mechanism assembly 1, allowing external moisture to intrude, the humidity sensor 11 immediately converts the detected excessive humidity data into an electrical signal and feeds it back to the PLC controller 81. The PLC controller 81 triggers the alarm 85 via the connecting wire 84. The alarm 85 employs a dual audible and visual alarm mode, emitting a prominent alarm to ensure timely intervention by personnel. To prevent internal metal conductive components from rusting due to condensation and reduced insulation performance, maintenance is performed. Upon receiving an alarm, the operator controls the metal conductive structure inside the insulating isolation cover 2 to switch to the disconnected state via the control mechanism 1. At this time, the interlocking component of the control mechanism 1 is automatically activated to prevent accidental reconnection during maintenance, ensuring that the solid-insulated switchgear is in a completely de-energized and safe state. This provides double safety protection for the maintenance work of the operator. This mechanism enables the isolation device to have a timely alarm function for sealing failure, enabling early detection and handling of faults, preventing the fault from escalating, and ensuring the stability of the power system operation.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A solid-insulated switchgear isolation device, comprising a control mechanism assembly (1) and an insulating isolation cover (2), characterized in that, The bottom end of the insulating cover (2) is fixedly connected to a bottom shell (3), the inner wall of the bottom shell (3) is fixedly connected to a support plate (4), and the upper surface of the support plate (4) is fixedly connected to a temperature control mechanism (5). A hollow block (6) is fixedly connected to the inner wall of the vertical part of the bottom shell (3), and a pressure regulating mechanism (7) is fixedly connected to the inner wall of the horizontal part of the bottom shell (3). The hollow block (6) has three sealing and fixing holes on its outer wall, and the walls of the three sealing and fixing holes are respectively fixedly connected to a temperature sensor (10), a humidity sensor (11) and a first air pressure sensor (12). The outer wall of the hollow block (6) is fixedly connected to an air intake check valve (13), and the vertical outer wall of the bottom shell (3) is provided with an installation through hole that cooperates with the air intake check valve (13).

2. The solid-insulated switchgear isolation device according to claim 1, characterized in that, The temperature control mechanism (5) includes a metal coil (51) fixedly connected to the upper surface of the support plate (4). The outlet end of the metal coil (51) is fixedly connected to an exhaust one-way valve (52). The inlet end of the metal coil (51) passes through the support plate (4) and extends downward. A metal mesh cylinder (53) is fixedly sleeved on the surface of the metal coil (51). A plurality of semiconductor cooling chips (54) are fixedly connected to the inner wall of the metal mesh cylinder (53).

3. The solid-insulated switchgear isolation device according to claim 2, characterized in that, The inner wall of the side end of the metal mesh cylinder (53) is fixedly connected to a small fan (9) for heat dissipation of multiple semiconductor cooling chips (54).

4. The solid-insulated switchgear isolation device according to claim 1, characterized in that, The pressure regulating mechanism (7) includes an inert gas box (71) fixedly connected to the inner wall of the horizontal part of the bottom shell (3). An electric push rod (72) is fixedly embedded in the side wall of the inert gas box (71). A moving block (73) is fixedly connected to the moving end of the electric push rod (72). A sealing cover (74) is fixedly sleeved on the outer wall of the moving block (73). The outer wall of the sealing cover (74) is slidably connected to the inner wall of the inert gas box (71). A first one-way valve (75) and a second one-way valve (76) are fixedly connected to the outer wall of the inert gas box (71). The inlet end of the first one-way valve (75) and the outlet end of the second one-way valve (76) are connected to each other. Both ends are fixedly connected to a bend (77), and the opposite ends of the two bends (77) are fixedly connected to a three-way reversing solenoid valve (78). The side port of the three-way reversing solenoid valve (78) passes through the inner wall of the hollow block (6) and is fixedly connected to the inner cavity of the hollow block (6). The upper surface of the inert gas box (71) is fixedly connected to a micro air pump (79) and a control component (8). The air inlet of the micro air pump (79) is fixedly connected to the inner cavity of the hollow block (6), and the air outlet of the micro air pump (79) is fixedly connected to a guide pipe (710). The air outlet of the guide pipe (710) is fixedly connected to the air inlet of the metal coil (51).

5. The solid-insulated switchgear isolation device according to claim 4, characterized in that, The control component (8) includes a PLC controller (81) and a fixing ring (82) fixedly connected to the upper surface of the inert gas box (71). A second pressure sensor (83) is fixedly connected to the inner wall of the fixing ring (82). The output end of the PLC controller (81) is electrically connected to a connecting wire (84), and the connecting end of the connecting wire (84) is electrically connected to an alarm (85).

6. The solid-insulated switchgear isolation device according to claim 1, characterized in that, The intake end of the intake one-way valve (13) is fixedly connected to the first air pipe (14), and the intake end of the first air pipe (14) is fixedly connected to the intake three-port connecting pipe (15) that matches the internal cavity of the insulating isolation cover (2).

7. The solid-insulated switchgear isolation device according to claim 2, characterized in that, The exhaust one-way valve (52) is fixedly connected to a second air pipe (16) at its outlet end, and the outlet end of the second air pipe (16) is fixedly connected to a three-port connecting pipe (17) that matches the internal cavity of the insulating isolation cover (2).

8. The solid-insulated switchgear isolation device according to claim 4, characterized in that, The inert gas box (71) has multiple vent holes on the outer wall near the electric push rod (72), and an injection hole is provided on the side of the inert gas box (71) away from the electric push rod (72), and an air nozzle (18) is fixedly connected to the wall of the injection hole.

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