Automatic voltage regulating device, gas insulated switchgear and automatic voltage regulating method

Abstract

The invention provides an automatic pressure regulating device, a gas insulated switchgear and an automatic pressure regulating method, the automatic pressure regulating device comprises a control module, a pressure regulating module and a pressure detection module, the pressure detection module is used for detecting a pressure value in a gas chamber, and the control module is used for generating a pressure regulating signal according to the detected pressure value and a preset pressure value; therefore, the pressure adjusting module communicated with the air chamber can adjust the volume of the space containing the air according to the pressure adjusting signal, the pressure value in the air chamber is adjusted, and then automatic adjustment of the pressure in the air chamber is achieved.

Description

Technical Field

[0001] This application relates to the technical field of high-voltage power distribution, and particularly to an automatic voltage regulating device, a gas-insulated switchgear, and an automatic voltage regulating method. Background Art

[0002] The gas-insulated switchgear fills the gas chamber with insulating gas to protect the equipment with good insulation performance and achieve safe operation. When the gas-insulated switchgear is actually applied, the air pressure in the gas chamber needs to be corrected according to requirements. For example, when the gas pressure in the gas chamber is less than the design value, the gas-insulated switchgear needs to be returned to the factory for maintenance to correct the air pressure. When the gas pressure in the gas chamber of the gas-filled cabinet is greater than the design value, the pressure relief valve can be manually controlled to correct the pressure in the gas chamber. Therefore, the method for realizing the pressure correction in the gas chamber is not intelligent enough. Summary of the Invention

[0003] This application provides an automatic voltage regulating device, a gas-insulated switchgear, and an automatic voltage regulating method for automatically regulating the pressure in the gas chamber.

[0004] This application provides an automatic voltage regulating device for regulating the pressure in the gas chamber, where the gas chamber is used to accommodate gas; the automatic voltage regulating device includes a pressure detection module, a control module, and a pressure regulation module. The pressure detection module is at least partially disposed in the gas chamber, and the pressure detection module is used to detect the pressure value in the gas chamber. The control module is electrically connected to the pressure detection module, and the control module is used to receive the pressure value detected by the pressure detection module and generate a pressure regulation signal according to the pressure value and the preset pressure value. The pressure regulation module is communicated with the gas chamber and is electrically connected to the control module, and the pressure regulation module is used to adjust the volume of the space for accommodating gas according to the received pressure regulation signal so as to adjust the pressure value in the gas chamber.

[0005] In some embodiments, the pressure regulation module includes a drive control unit and a retraction / extension regulation unit. The drive control unit is electrically connected to the control module and is configured to generate a drive control signal according to the received pressure regulation signal. The retraction / extension regulation unit is electrically connected to the drive control unit and is communicated with the gas chamber, and is configured to control the volume of the space for accommodating gas to increase or decrease according to the received drive control signal so as to adjust the pressure value in the gas chamber.

[0006] In some embodiments, the retraction / extension regulation unit includes a drive assembly and a displacement assembly. The drive assembly is connected to the drive control unit and is configured to generate a displacement control signal according to the drive control signal. The displacement assembly is movably connected to the drive assembly and is configured to move away from or close to the gas chamber according to the displacement control signal so as to control the pressure value in the gas chamber to decrease or increase.

[0007] In some embodiments, the displacement assembly includes a connecting member, a first displacement member, and a second displacement member. The connecting member includes a receiving cavity communicating with the air chamber. The first displacement member is located in the receiving cavity and abuts against the inner wall of the receiving cavity. The second displacement member is movably connected to the driving assembly and extends into the receiving cavity to be fixedly connected to the first displacement member. Wherein, when the pressure value is greater than the preset pressure value, the first displacement member is configured to move away from the air chamber in the receiving cavity under the drive of the second displacement member to control the pressure value in the air chamber to decrease. When the pressure value is less than the preset pressure value, the first displacement member is configured to move towards the air chamber in the receiving cavity under the drive of the second displacement member to control the pressure value in the air chamber to increase.

[0008] In some embodiments, the drive control unit includes a rotating shaft, and the surface of the second displacement member is provided with a first thread; the drive assembly includes a first transmission gear and a second transmission gear. The first transmission gear is fixedly connected to the rotating shaft of the drive control unit, and the surface of the first transmission gear is provided with a second thread. The second transmission gear is sleeved on the second displacement member, the inner surface of the second transmission gear is provided with a third thread meshing with the first thread, and the outer surface of the second transmission gear is provided with a fourth thread meshing with the second thread.

[0009] In some embodiments, the air chamber has a first through hole. The connecting member includes a transition connecting member and a first housing. The transition connecting member includes a first connecting portion and a second connecting portion fixedly connected, at least a part of the first connecting portion is sleeved in the first through hole and abuts against the inner wall of the first through hole; the transition connecting member is provided with a second through hole communicating with the first through hole along the direction from the first connecting portion to the second connecting portion. The first housing is fixedly connected to the second connecting portion, and the first housing is provided with a third through hole along the direction from the first connecting portion to the second connecting portion. Wherein, the second through hole and the third through hole communicate to form the receiving cavity.

[0010] The present application provides a gas-insulated switchgear, including any one of the above-mentioned automatic pressure regulating devices and an air chamber for containing gas. Wherein, the automatic pressure regulating device is used to regulate the pressure in the air chamber.

[0011] The present application provides an automatic pressure regulating method for regulating the pressure of the air chamber of any one of the above-mentioned gas-insulated switchgears. The automatic pressure regulating method includes: detecting the pressure value in the air chamber; in response to the detected pressure value being greater than the preset pressure value, controlling the volume of the space containing the gas to increase to control the pressure value in the air chamber to decrease; or, in response to the detected pressure value being less than the preset pressure value, controlling the volume of the space containing the gas to decrease to control the pressure value in the air chamber to increase.

[0012] In some embodiments, after the step of detecting the pressure value in the air chamber, the method further includes: determining whether the detected pressure value is less than a first preset warning value; wherein the first preset warning value is less than the preset pressure value; generating a first alarm signal when it is determined that the detected pressure value is less than the first preset warning value; and outputting undervoltage fault information according to the first alarm signal.

[0013] In some embodiments, after the step of detecting the pressure value in the air chamber, the method further includes: determining whether the detected pressure value is greater than a second preset warning value; wherein the second preset warning value is greater than the preset pressure value; generating a second alarm signal when it is determined that the detected pressure value is greater than the second preset warning value; and outputting overvoltage fault information according to the second alarm signal.

[0014] The automatic voltage regulating device, gas insulated switchgear and automatic voltage regulating method provided by the embodiments of the present application enable the automatic voltage regulating device to include a control module, a pressure regulating module and a pressure detection module, so as to detect the pressure value in the air chamber by using the pressure detection module, and generate a pressure regulating signal by using the control module according to the detected pressure value and the preset pressure value, so that the pressure regulating module communicated with the air chamber can adjust the volume of the space containing the gas according to the pressure regulating signal, thereby adjusting the pressure value in the air chamber, and then realizing the automatic regulation of the pressure in the air chamber. When the automatic voltage regulating device is applied to the gas insulated switchgear, the automatic voltage regulating device can realize the automatic regulation of the air chamber pressure of the gas insulated switchgear, thereby improving the problems that the air chamber pressure correction process of the gas insulated switchgear is relatively complicated and dangerous. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in accordance with the present application and should not be regarded as limiting the scope of the present application.

[0016] Figure 1 is a schematic block diagram of the automatic voltage regulating device provided by the embodiments of the present application; Figures 2A to 2C is a schematic structural diagram of the connection between the automatic voltage regulating device provided by the embodiments of the present application and the air chamber; Figure 3 is an exploded structural diagram of the automatic voltage regulating device provided by the embodiments of the present application; Figure 4 is a schematic structural diagram of the pressure regulating module provided by the embodiments of the present application; Figure 5 is a schematic structural diagram of the connecting member provided by the embodiments of the present application; Figure 6It is a schematic structural diagram of the gas-insulated switchgear provided by the embodiment of the present application; Figures 7A to 7D It is a flowchart of the automatic voltage regulation method provided by the embodiment of the present application. Detailed implementation manners

[0017] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion.

[0018] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. The term "plurality" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups). The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements.

[0019] In the gas-insulated switchgear, by filling the gas chamber with insulating gas, the equipment can be protected to have good insulation performance and achieve safe operation. However, due to factors such as the use environment and service life, the air pressure in the gas chamber needs to be corrected. When the gas pressure in the gas chamber is less than the design value, the gas-insulated switchgear can be returned to the factory for repair to correct the air pressure. When the gas pressure in the gas chamber of the gas-filled cabinet is greater than the design value, the pressure relief valve can be manually controlled to correct the pressure in the gas chamber.

[0020] Taking a gas-insulated switchgear as an example of a high-voltage gas-filled cabinet for illustration. When using a high-voltage gas-filled cabinet, it is necessary to correct the pressure of the gas chamber according to the altitude or service life of the use site. When the gas pressure in the gas chamber of the gas-filled cabinet is less than the design value, the gas-filled cabinet needs to be returned to the factory for repair before it can be used continuously. However, returning to the factory for repair takes time and costs, which is not conducive to maximizing the benefits. When the gas pressure in the gas chamber of the gas-filled cabinet is greater than the design value, a manual method is often used to control the pressure relief valve to reduce the gas chamber pressure, thereby realizing the correction of the gas chamber pressure. However, the method of manually correcting the gas chamber pressure may be dangerous. For example, for a gas-filled cabinet filled with hydrogen sulfide gas, because hydrogen sulfide gas will decompose and produce highly toxic substances under the action of an electric arc. Therefore, using a manual control pressure relief valve to correct the gas chamber pressure of a gas-filled cabinet filled with hydrogen sulfide gas will release toxic substances into the environment through the pressure relief valve, polluting the environment and causing harm to maintenance operators. Therefore, the method of realizing the pressure correction in the gas chamber is not intelligent enough.

[0021] For this reason, the present application provides an automatic pressure regulating device, a gas-insulated switchgear and an automatic pressure regulating method for realizing the automatic regulation of the pressure in the gas chamber and improving the problem that the pressure correction in the gas chamber is not intelligent enough.

[0022] Specifically, as Figure 1 is the principle block diagram of the automatic pressure regulating device provided by the embodiment of the present application, Figures 2A to 2C is the structural schematic diagram of the connection between the automatic pressure regulating device provided by the embodiment of the present application and the gas chamber, Figure 3 is the exploded structural schematic diagram of the automatic pressure regulating device provided by the embodiment of the present application. Among them, Figure 2C is a cross-sectional view taken along the length direction of the automatic pressure regulating device.

[0023] The present application provides an automatic pressure regulating device for regulating the pressure in the gas chamber 10, and the gas chamber 10 is used to accommodate gas. The automatic pressure regulating device includes a pressure detection module 20, a control module 30 and a pressure regulating module 40.

[0024] Among them, the gas chamber 10 refers to a cavity for accommodating gas. The gas chamber 10 can be a gas chamber included in equipment for power grid construction, environmental monitoring, medical health or chemical production, etc. For example, the gas chamber 10 is a gas chamber of a gas-insulated switchgear for power grid construction. The gas accommodated in the gas chamber 10 can be different according to actual needs. For example, in a gas-insulated switchgear, the gas accommodated in the gas chamber 10 can be hydrogen sulfide gas (such as sulfur hexafluoride, SF6), nitrogen, hydrogen or carbon dioxide, etc. The shape of the gas chamber 10 can be cylindrical, cubic, etc.

[0025] The pressure detection module 20 is at least partially disposed in the air chamber 10, and the pressure detection module 20 is configured to detect the pressure value in the air chamber 10.

[0026] The control module 30 is electrically connected to the pressure detection module 20. The control module 30 is configured to receive the pressure value detected by the pressure detection module 20 and generate a pressure adjustment signal based on the pressure value and a preset pressure value.

[0027] The pressure adjustment module 40 is in communication with the air chamber 10 and is electrically connected to the control module 30. The pressure adjustment module 40 is configured to adjust the volume of the space containing the gas according to the received pressure adjustment signal, so as to adjust the pressure value in the air chamber 10.

[0028] By making the automatic pressure regulating device 100 include the pressure detection module 20, the control module 30 and the pressure adjustment module 40, the pressure detection module 20 is used to detect the pressure value in the air chamber 10, and the control module 30 is used to generate a pressure adjustment signal according to the detected pressure value and the preset pressure value, so that the pressure adjustment module 40 in communication with the air chamber 10 can adjust the volume of the space containing the gas according to the pressure adjustment signal, thereby adjusting the pressure value in the air chamber 10, and then realizing the automatic adjustment of the pressure in the air chamber 10.

[0029] Optionally, that the pressure detection module 20 is at least partially disposed in the air chamber 10 means that a part of the pressure detection module 20 is disposed in the air chamber 10 for detecting the pressure in the air chamber 10. In addition, another part of the pressure detection module 20 is disposed outside the air chamber 10 and is electrically connected to the control module 30 through a wire.

[0030] The pressure detection module 20 can be a pressure sensor or other devices that can realize pressure detection. Optionally, the pressure detection module 20 can detect the pressure in the air chamber 10 in real time, so that the automatic pressure regulating device 100 can realize the real-time detection and real-time adjustment of the pressure value in the air chamber 10. In addition, the pressure detection module 20 can also detect the pressure in the air chamber 10 at intervals of a preset time duration to reduce the power consumption of the automatic adjustment device. The preset time duration can be set according to parameters such as the air pressure decay law in the air chamber 10.

[0031] It should be noted that the method of the pressure detection module 20 for real-time detection of the pressure in the air chamber 10 and the method of detection at intervals of a preset time period can be applied simultaneously. For example, when the automatic pressure regulating device 100 is applied to a gas-insulated switchgear to adjust the pressure in the air chamber 10 of the gas-insulated switchgear. When the gas-insulated switchgear is first applied, it is necessary to correct the pressure in the air chamber 10 according to the altitude of the site. At this time, the method of real-time detection of the pressure in the air chamber 10 can be used to detect the pressure in the air chamber 10, so as to realize the adjustment of the pressure in the air chamber 10. During the use of the gas-insulated switchgear, when the pressure in the air chamber 10 has an accumulated change over time, the method of detecting the pressure in the air chamber 10 at intervals of a preset time period can be used to determine whether it is necessary to correct the pressure in the air chamber 10. If the pressure in the air chamber 10 is still detected in real time during the use of the gas-insulated switchgear, then some of the results detected by the pressure detection module 20 will not be used to realize the adjustment of the pressure in the air chamber 10. Therefore, to save computing power and reduce power consumption, the pressure in the air chamber 10 can be detected and corrected at intervals of a preset time period during the use of the gas-insulated switchgear. It should be understood that during the use of the gas-insulated switchgear, the pressure in the air chamber 10 can also be detected and corrected in real time to reduce the abnormal operation of the equipment caused by sudden changes in the pressure in the air chamber 10 and other reasons.

[0032] The control module 30 may include devices with logical processing functions such as a processor and a system-on-chip. Optionally, the control module 30 and the pressure detection module 20 can communicate with each other in a wired or wireless manner.

[0033] The pressure regulating module 40 is communicated with the air chamber 10, so that the automatic pressure regulating device 100 can also have a first space S1 for accommodating gas. Therefore, the volume of the space for accommodating gas includes the volume of the air chamber 10 and the volume of the first space S1 for accommodating gas in the automatic pressure regulating device 100. The volume of the air chamber 10 refers to the size of the space in the air chamber 10 that can be used to accommodate gas, and the volume of the first space S1 for accommodating gas in the automatic pressure regulating device 100 refers to the size of the first space S1 for accommodating gas in the automatic pressure regulating device 100, such as Figures 2A to 2C .

[0034] It can be understood that the pressure value detected by the pressure detection module 20 may be greater than, equal to, or less than the preset pressure value. When the pressure value detected by the pressure detection module 20 is greater than the preset pressure value, it indicates that the pressure in the air chamber 10 is relatively high, and the pressure in the air chamber 10 needs to be reduced. When the pressure value detected by the pressure detection module 20 is less than the preset pressure value, it indicates that the pressure in the air chamber 10 is relatively low, and the pressure in the air chamber 10 needs to be increased. When the pressure value detected by the pressure detection module 20 is equal to the preset pressure value, it indicates that the pressure in the air chamber 10 meets the requirements, and the pressure in the air chamber 10 does not need to be adjusted. Therefore, according to the relationship between the detected pressure value and the preset pressure value, the volume of the space containing the gas can be adjusted correspondingly through the control module 30 and the pressure adjustment module 40, and then the pressure of the air chamber 10 can be adjusted.

[0035] The preset pressure value is the pressure value that is expected to be in the air chamber 10 to meet the design requirements during actual use. The preset pressure value can be set to different values according to different factors such as the actual use scenario. The preset pressure value can be a numerical value or a numerical range.

[0036] When the preset pressure value is a numerical range, that the pressure value detected by the pressure detection module 20 is greater than the preset pressure value means that the pressure value detected by the pressure detection module 20 is greater than all the numerical values included in this numerical range; that the pressure value detected by the pressure detection module 20 is less than the preset pressure value means that the pressure value detected by the pressure detection module 20 is less than all the numerical values included in this numerical range; that the pressure value detected by the pressure detection module 20 is equal to the preset pressure value means that the pressure value detected by the pressure detection module 20 is equal to a numerical value within this numerical range.

[0037] Optionally, the control module 30 can be used to compare the relationship between the detected pressure value and the preset pressure value.

[0038] Optionally, through the mutual cooperation of the control module 30 and the pressure adjustment module 40, the control of increasing or decreasing the pressure value in the air chamber 10 can be achieved. For example, the control module 30 is configured to generate a first pressure adjustment signal when the pressure value is greater than the preset pressure value, and the pressure adjustment module 40 is configured to control the volume of the space containing the gas to increase according to the received first pressure adjustment signal, so as to control the pressure value in the air chamber 10 to decrease. The control module 30 is configured to generate a second pressure adjustment signal when the pressure value is less than the preset pressure value, and the pressure adjustment module 40 is configured to control the volume of the space containing the gas to decrease according to the received second pressure adjustment signal, so as to control the pressure value in the air chamber 10 to increase. Among them, the pressure adjustment signal includes the first pressure adjustment signal and the second pressure adjustment signal, and the drive control signal includes the first drive control signal and the second drive control signal.

[0039] Please continue to refer to Figures 2A to 2C andFigures 3 to 4 , such as Figure 4 is a schematic structural diagram of a pressure regulation module provided by an embodiment of the present application. To adjust the volume of the space containing gas so as to regulate the pressure value in the air chamber 10, the pressure regulation module 40 may include a drive control unit 401 and a retraction / extension regulation unit 402.

[0040] The drive control unit 401 is electrically connected to the control module 30, and the drive control unit 401 is configured to generate a drive control signal according to the received pressure regulation signal.

[0041] The retraction / extension regulation unit 402 is electrically connected to the drive control unit 401 and is in communication with the air chamber 10. The retraction / extension regulation unit 402 is configured to control the volume of the space containing gas to increase or decrease according to the received drive control signal, so as to regulate the pressure value in the air chamber 10.

[0042] By making the pressure regulation module 40 include the drive control unit 401 and the retraction / extension regulation unit 402, the volume of the space containing gas is regulated by the mutual cooperation of the drive control unit 401 and the retraction / extension regulation unit 402, so as to regulate the pressure value in the air chamber 10.

[0043] By making the pressure regulation module 40 include the drive control unit 401 and the retraction / extension regulation unit 402, the volume of the space containing gas is regulated by the mutual cooperation of the drive control unit 401 and the retraction / extension regulation unit 402, so as to regulate the pressure value in the air chamber 10.

[0044] The drive control unit 401 may be a device such as a motor. Communication between the drive control unit 401 and the control module 30 may be carried out wired or wirelessly.

[0045] Optionally, under the control of the control module 30, the drive control unit 401 and the retraction / extension regulation unit 402 are configured to control the increase or decrease of the pressure value in the air chamber 10. For example, when the pressure value detected by the pressure detection module 20 is greater than the preset pressure value, the drive control unit 401 may be configured to generate a first drive control signal according to the received first pressure regulation signal, and the retraction / extension regulation unit 402 may be configured to control the volume of the space containing gas to increase according to the received first drive control signal, so as to control the pressure value in the air chamber 10 to decrease. When the pressure value detected by the pressure detection module 20 is less than the preset pressure value, the drive control unit 401 may be configured to generate a second drive control signal according to the received second pressure regulation signal, and the retraction / extension regulation unit 402 may be configured to control the volume of the space containing gas to decrease according to the received second drive control signal, so as to control the pressure value in the air chamber 10 to increase.

[0046] Please continue to refer to Figures 2A to 2C and Figures 3 to 4, to adjust the volume of the space for containing gas, the advancing and retreating adjustment unit 402 may include a driving component 4021 and a displacement component 4022.

[0047] The driving component 4021 is connected to the driving control unit 401, and the driving component 4021 is configured to generate a displacement control signal according to the driving control signal.

[0048] The displacement component 4022 is movably connected to the driving component 4021, and the displacement component 4022 is configured to move away from or close to the air chamber 10 according to the displacement control signal, so as to control the pressure value in the air chamber 10 to decrease or increase.

[0049] For example, when the pressure value detected by the pressure detection module 20 is greater than the preset pressure value, the driving component 4021 may be configured to generate a first displacement control signal according to the first driving control signal, and the displacement component 4022 may be configured to move away from the air chamber 10 according to the first displacement control signal, so as to control the pressure value in the air chamber 10 to decrease. When the pressure value detected by the pressure detection module 20 is less than the preset pressure value, the driving component 4021 may be configured to generate a second displacement control signal according to the first driving control signal, and the displacement component 4022 may be configured to move close to the air chamber 10 according to the second displacement control signal, so as to control the pressure value in the air chamber 10 to increase. Wherein, the displacement control signal includes a first displacement control signal and a second displacement control signal.

[0050] To enable the displacement component 4022 to move away from or close to the air chamber 10, so as to control the pressure value in the air chamber 10 to decrease or increase, the displacement component 4022 may include a connecting member 4022A, a first displacement member 4022B and a second displacement member 4022C.

[0051] The connecting member 4022A includes a containing cavity SA communicating with the air chamber 10. The first displacement member 4022B is located in the containing cavity SA and abuts against the inner wall of the containing cavity SA. The second displacement member 4022C is movably connected to the driving component 4021 and extends into the containing cavity SA to be fixedly connected to the first displacement member 4022B. The second displacement member 4022C is configured to drive the first displacement member 4022B to move away from or close to the air chamber 10 in the containing cavity SA according to the displacement control signal.

[0052] For example, when the pressure value is greater than the preset pressure value, the first displacement member 4022B is configured to move away from the air chamber 10 in the containing cavity under the drive of the second displacement member 4022C, so as to control the pressure value in the air chamber 10 to decrease. When the pressure value is less than the preset pressure value, the first displacement member 4022B is configured to move close to the air chamber 10 in the containing cavity under the drive of the second displacement member 4022C, so as to control the pressure value in the air chamber 10 to increase.

[0053] The first displacement member 4022B abuts against the inner wall of the accommodation cavity SA, enabling the first displacement member 4022B to achieve spatial isolation of gas. That is, within the first space S1 on the side of the first displacement member 4022B close to the gas chamber 10, there is filled with the same gas as that in the gas chamber 10. While within the second space on the side of the first displacement member 4022B far from the gas chamber 10, the gas in the gas chamber 10 is blocked by the first displacement member 4022B and cannot move into the second space located on the side of the first displacement member 4022B far from the gas chamber 10, as Figures 2A to 2C shown.

[0054] Optionally, the inner surface of the accommodation cavity SA is provided with threads, and the outer surface of the first displacement member 4022B is provided with threads that cooperate with the threads on the inner surface of the accommodation cavity SA. When the second displacement member 4022C drives the first displacement member 4022B to move within the accommodation cavity SA, through the threaded connection between the first displacement member 4022B and the accommodation cavity SA, the first displacement member 4022B moves relative to the accommodation cavity SA. In addition, the threaded connection between the first displacement member 4022B and the accommodation cavity SA can also improve the connection reliability between the first displacement member 4022B and the accommodation cavity SA. Moreover, the threaded connection between the first displacement member 4022B and the accommodation cavity SA enables the magnitude of the displacement of the first displacement member 4022B relative to the accommodation cavity SA to be adjustable, which is beneficial to improving the precision control of the pressure regulation of the gas chamber 10.

[0055] Optionally, along the extending direction of the accommodation cavity SA, the length of the part of the inner surface of the accommodation cavity SA provided with threads is greater than the length of the first displacement member 4022B, so that the first displacement member 4022B has a larger displacement range within the accommodation cavity SA, thereby broadening the range of pressure regulation of the gas chamber 10.

[0056] Optionally, the entire inner surface of the accommodation cavity SA is provided with threads, so that the displacement range of the first displacement member 4022B moving within the accommodation cavity SA is the largest.

[0057] Optionally, the outer surface of the second displacement member 4022C can also be provided with threads, so that the part of the second displacement member 4022C extending into the accommodation cavity SA can engage with the threads on the inner surface of the accommodation cavity SA, thereby improving the connection reliability between the second displacement member 4022C and the accommodation cavity SA.

[0058] Optionally, the first displacement member 4022B can be a lead screw piston, and the second displacement member 4022C can be a lead screw.

[0059] Please continue to refer to Figures 2A to 2B and Figures 3 to 4, to enable the displacement component 4022 to move away from or closer to the air chamber 10, the drive control unit 401 may include a rotating shaft 401A. Correspondingly, the drive control signal corresponding to the drive control unit 401 may be manifested as the rotational movement of the rotating shaft 401A, and the displacement control signal may be manifested as the movement transmission between transmission parts. The surface of the second displacement member 4022C may be provided with a first thread, and the drive assembly 4021 may include a first transmission gear 4021A and a second transmission gear 4021B.

[0060] The first transmission gear 4021A is fixedly connected to the rotating shaft 401A of the drive control unit 401, so that the first transmission gear 4021A can rotate under the drive of the rotating shaft 401A. Among them, the surface of the first transmission gear 4021A may be provided with a second thread.

[0061] The second transmission gear 4021B is sleeved on the second displacement member 4022C. The inner surface of the second transmission gear 4021B is provided with a third thread that meshes with the first thread, and the outer surface of the second transmission gear 4021B is provided with a fourth thread that meshes with the second thread. The fourth thread meshes with the second thread, so that the second transmission gear 4021B can rotate under the drive of the first transmission gear 4021A. Then, through the meshing of the first thread and the third thread, the second displacement assembly 4022 moves along the extension direction of the accommodation cavity SA under the drive of the second transmission gear 4021B, thereby driving the first displacement assembly 4022 to move away from or closer to the air chamber 10 in the accommodation cavity SA to control the decrease or increase of the pressure value in the air chamber 10.

[0062] When the pressure value detected by the pressure detection module 20 is greater than the preset pressure value, the first drive control signal generated by the drive control unit 401 can be manifested as the rotary shaft 401A rotating in the first direction, so as to drive the first transmission gear 4021A to rotate in the first direction, thereby driving the second transmission gear 4021B to rotate in the third direction perpendicular to the first direction. Then, the second displacement assembly 4022 is driven by the second transmission gear 4021B to move inward in a direction away from the air chamber 10, so as to drive the first displacement assembly 4022 to also move away from the air chamber 10 in the accommodation chamber SA, thereby increasing the volume for accommodating gas in the accommodation chamber SA, and then realizing the control of the pressure value in the air chamber 10 to decrease. When the pressure value detected by the pressure detection module 20 is less than the preset pressure value, the second drive control signal generated by the drive control unit 401 can be manifested as the rotary shaft rotating in the second direction, so as to drive the first transmission gear 4021A to rotate in the second direction, thereby driving the second transmission gear 4021B to rotate in the fourth direction perpendicular to the second direction. Then, the second displacement assembly 4022 is driven by the second transmission gear 4021B to move inward in a direction close to the air chamber 10, so as to drive the first displacement assembly 4022 to also move close to the air chamber 10 in the accommodation chamber SA, thereby reducing the volume for accommodating gas in the accommodation chamber SA, and then realizing the control of the pressure value in the air chamber 10 to increase. The first direction and the second direction are opposite, and the third direction and the fourth direction are opposite.

[0063] Optionally, the advance and retreat adjustment unit 402 includes a housing 4021C provided outside the drive assembly 4021, and the housing 4021C is used to accommodate and protect the drive assembly 4021.

[0064] Figure 5 It is a schematic structural diagram of the connecting member provided by the embodiment of the present application. To prevent gas from leaking from the connection between the accommodation chamber and the air chamber 10, the air chamber 10 can be provided with a first through hole, and the connecting member 4022A includes a first housing 40b and a transition connecting member 40a.

[0065] The transition connecting member 40a includes a first connecting portion 401a and a second connecting portion 402a that are fixedly connected. At least part of the first connecting portion 401a is sleeved in the first through hole and abuts against the inner wall of the first through hole. The transition connecting member 40a is provided with a second through hole communicating with the first through hole in the direction from the first connecting portion 401a to the second connecting portion 402a. The first housing 40b is fixedly connected to the second connecting portion 402a, and the first housing 40b is provided with a third through hole in the direction from the first connecting portion 401a to the second connecting portion 402a.

[0066] Wherein, the second through hole and the third through hole communicate to form the accommodation chamber SA. That is, the accommodation chamber SA correspondingly includes two parts, namely the second through hole and the third through hole.

[0067] Optionally, the transition connecting member 40a and the first housing 40b can be connected by threads, and an interference fit can be adopted between the transition connecting member 40a and the air chamber 10, so that the transition connecting member 40a has a relatively reliable connection with both the first housing 40b and the air chamber 10.

[0068] Optionally, the first displacement member 4022B can only move within the second through hole, so that the connection between the transition connecting member 40a and the first housing 40b does not contact the gas transmitted in the air chamber 10, thereby preventing gas leakage from the connection between the transition connecting member 40a and the first housing 40b.

[0069] Optionally, the automatic pressure regulating device 100 can also have an under-voltage alarm function. As shown in Figure 1 , the automatic pressure regulating device 100 further includes an information notification module 50, and the information notification module 50 is electrically connected to the control module 30. The information notification module 50 is configured to output an under-voltage fault message when the pressure value is less than the first preset warning value, so as to enable maintenance personnel to understand the pressure condition in the air chamber 10 in a timely manner when the pressure value in the air chamber 10 is too low. Among them, the first preset warning value is less than the preset pressure value.

[0070] Optionally, the automatic pressure regulating device can also have an over-voltage alarm function. The information notification module 50 is configured to output an over-voltage fault message when the pressure value is greater than the second preset warning value, so as to enable maintenance personnel to understand the pressure condition in the air chamber 10 in a timely manner when the pressure value in the air chamber 10 is too high. Among them, the second preset warning value is greater than the preset pressure value.

[0071] Optionally, the control module 30 can be used to judge the magnitude relationship between the pressure value and the first preset warning value and the second preset warning value, and then control whether the information notification module 50 outputs an under-voltage fault message and an over-voltage fault message through the control module 30. That is, the control module 30 is further configured to generate a first alarm signal when the pressure value is less than the first preset warning value, and the information notification module 50 is configured to output an under-voltage fault message according to the received first alarm signal. The control module 30 is configured to generate a second alarm signal when the pressure value is greater than the second preset warning value, and the information notification module 50 is configured to output an over-voltage fault message according to the received second alarm signal.

[0072] It should be noted that the first preset warning value and the second preset warning value can be set according to actual needs. The under-voltage fault message and the over-voltage fault message can be transmitted in the form of sound, image, etc.

[0073] To make the pressure value in the air chamber 10 artificially controllable, the automatic pressure regulating device may further include a human-machine interaction module 60. The human-machine interaction module 60 is electrically connected to the control module 30, and is configured to store at least one of a preset pressure value, a first preset warning value, and a second preset warning value in the control module 30.

[0074] It should be noted that the human-machine interaction module 60 may include devices such as a display. The display includes an interface that can be used to implement human-machine interaction. Among them, the display may include a display with a touch function.

[0075] Optionally, the control module 30 receives the pressure value detected by the pressure detection module 20, and transmits the pressure value detected by the detection module in real time to the display, so as to display the pressure information in the air chamber 10 in real time, so that maintenance personnel can timely understand the pressure situation in the air chamber 10.

[0076] Optionally, the human-machine interaction module 60 may further include an input unit to perform an operation of writing at least one of a preset pressure value, a first preset warning value, and a second preset warning value. Among them, the input unit includes a mouse, a keyboard, etc.

[0077] Optionally, the human-machine interaction module 60 and the information notification module 50 may be integrated together or share the same device. For example, the information notification module 50 and the human-machine interaction module 60 may share a display, so that the display can display at least one of the written preset pressure value, the first preset warning value, and the second preset warning value while displaying overpressure fault information and underpressure fault information.

[0078] Optionally, the automatic pressure regulating device may further include a communication module. The communication module 70 is used to implement the communication function between the automatic pressure regulating device and other devices (such as a programmable logic controller). Optionally, the control module 30 may be integrated with at least one of the human-machine interaction module 60, the information notification module 50, and the communication module 70 to reduce the layout space occupied by the automatic device.

[0079] Optionally, the automatic pressure regulating device may further include a power interface connected to a power supply to supply the required power to the control module 30 and the like through the power interface. Among them, the power interface can be connected to a mains socket through devices such as a power plug.

[0080] Optionally, the automatic pressure regulating device may further include an energy storage module. The energy storage module is used to supply power to devices such as the control module 30 in the automatic pressure regulating device. Among them, the energy storage module can also be used as a backup power supply, and the energy storage module can be a battery.

[0081] FIG. 7 is a schematic structural diagram of a gas-insulated switchgear provided by an embodiment of the present application. The present application also provides a gas-insulated switchgear, which includes a gas chamber 10 and any one of the above automatic pressure regulating devices (labeled 100 in FIG. 7).

[0082] Optionally, the gas-insulated switchgear may be a device with a gas chamber 10 such as a high-voltage gas-filled cabinet.

[0083] The gas chamber 10 is used to contain gas, and the gas chamber 10 is communicated with the pressure regulating module 40 of the automatic pressure regulating device 100. The gas contained in the gas chamber 10 may be an inert gas. The inert gas may be hydrogen sulfide gas (such as sulfur hexafluoride, SF6).

[0084] It can be understood that the gas in the gas chamber 10 can be set differently according to actual needs. The description that the above gas is sulfur hexafluoride is not used to limit that the gas in the gas chamber 10 can only be sulfur hexafluoride. Instead, it should be understood that the gas in the gas chamber 10 can also be other gases.

[0085] The automatic pressure regulating device 100 is used to regulate the pressure in the gas chamber 10. Optionally, the automatic pressure regulating device 100 may be located at the bottom, top or side of the gas chamber 10. Therefore, the relative position of the automatic pressure regulating device 100 shown in FIG. 7 and the gas chamber 10 is only for illustration for understanding and should not be construed as a limitation to the present application.

[0086] By arranging the automatic pressure regulating device 100 in the gas-insulated switchgear, the pressure detection module 20 in the automatic pressure regulating device 100 can be used to detect the pressure value of the gas chamber 10, so that the control module 30 can generate a pressure regulating signal according to the relationship between the detected pressure value and the preset pressure value. Thus, the pressure regulating module 40 communicated with the gas chamber 10 can adjust the volume of the space containing the gas according to the pressure regulating signal, and then adjust the pressure value in the gas chamber 10 to realize the automatic regulation of the pressure in the gas chamber 10, and improve the problems such as non-intelligent controllability, relatively complicated processes, the overall bulkiness of the gas-insulated switchgear due to the attached gas cylinders, and high danger coefficients when correcting the pressure of the gas chamber 10 of the high-voltage gas-filled cabinet. And because the structure of the automatic pressure regulating device 100 is simple, the operation is simple, the volume is small, and the weight is light. Therefore, while realizing the pressure regulation of the gas chamber 10 to improve the safety performance of the gas-insulated switchgear, it is beneficial to improve the market competitiveness of the gas-insulated switchgear.

[0087] Please continue to refer to FIG. 7. The gas chamber 10 includes an intake valve 10A and a relief valve 10B. The intake valve 10A is arranged on the gas chamber 10 for filling gas into the gas chamber 10. The relief valve 10B is arranged on the gas chamber 10 for filling gas into the gas chamber 10.

[0088] It should be noted that either the air release valve 10B or the intake valve 10A can be arranged at the bottom, top or side of the air chamber 10, and the present application does not make specific limitations thereto.

[0089] Optionally, the air chamber 10 further includes a first through hole, and the first through hole communicates with the pressure regulation module 40 of the automatic pressure regulation device, so as to adjust the pressure value of the air chamber 10 through the automatic pressure regulation device 100. Optionally, the first through hole communicates with the accommodation cavity SA of the connecting member 4022A in the pressure regulation module 40, so as to realize the communication between the air chamber 10 and the pressure regulation module 40 through the first through hole and the accommodation cavity SA.

[0090] Optionally, the control module 30, the information notification module 50 and the human-machine interaction module 60 of the automatic pressure regulation device 100 can be integrated into one body to form an information control device 200, and the information control device 200 is installed on the housing of the gas-insulated switchgear, so as to facilitate the user to set the preset pressure value, the first warning value and the second preset warning value. In addition, the control module 30, the information notification module 50 and the human-machine interaction module 60 are integrated into one body, and can also be used to display the pressure value in the air chamber 10 in real time, so that the user can understand the operating state of the gas-insulated switchgear.

[0091] It should be noted that the gas-insulated switchgear may further include devices not shown, such as a high-voltage circuit breaker and a three-position switch. Among them, before the gas-insulated switchgear is ready to operate, the high-voltage circuit breaker or the three-position switch can be installed in the air chamber 10 first, and then the required gas is filled into the air chamber 10 through the intake valve 10A of the air chamber 10. When the pressure value of the air chamber 10 reaches the preset value, the automatic pressure regulation device 100 is installed in the gas-insulated switchgear to avoid the automatic pressure regulation device 100 from automatically adjusting the pressure value in the air chamber 10 at the moment of inflating the air chamber 10 before the gas-insulated switchgear is ready to operate. The external power supply module is connected to the power connection port of the drive control unit and the power supply terminals of modules such as the control module, and the communication module is connected to the external programmable logic controller. After the assembly is completed and the inspection is qualified, the gas-insulated switchgear is powered on and operates normally. Parameters such as the preset value, the first warning value and the second warning value can be input through the human-machine interaction module, and the automatic pressure regulation device 100 starts to work. When an overvoltage or undervoltage fault occurs in the gas-insulated switchgear, the communication module can immediately send a fault signal to the programmable logic controller, and there will be a corresponding change in a group of fault switch quantity states on the back of the controller device 200, and this group of fault switch quantities can be output for the user to select.

[0092] It can be understood that since the gas-insulated switchgear provided by the present application realizes the regulation of the air chamber pressure by applying any of the above automatic pressure regulation devices, therefore, the gas-insulated switchgear has all the beneficial effects of the above automatic pressure regulation devices, and will not be elaborated here.

[0093] Figures 7A to 7D Figures 7A to 7D is a flowchart of the automatic pressure regulation method provided by the embodiments of the present application. The present application also provides an automatic pressure regulation method for regulating the pressure of the gas chamber 10 of any of the above gas-insulated switchgears. The automatic pressure regulation method includes: Step S10: Detect the pressure value in the gas chamber 10; Step S20: Adjust the volume of the space containing the gas according to the detected pressure value and the preset pressure value to adjust the pressure value in the gas chamber 10.

[0094] Among them, step S10 can be executed by the pressure detection module 20 of the automatic pressure regulation device, and step S20 can be executed by the control module 30 of the automatic pressure regulation device and the pressure adjustment module of the automatic pressure regulation device.

[0095] In some embodiments, adjusting the volume of the space containing the gas according to the detected pressure value and the preset pressure value to adjust the pressure value in the gas chamber 10 includes: in response to the detected pressure value being greater than the preset pressure value, controlling the volume of the space containing the gas to increase to control the pressure value in the gas chamber 10 to decrease.

[0096] In some embodiments, adjusting the volume of the space containing the gas according to the detected pressure value and the preset pressure value to adjust the pressure value in the gas chamber 10 includes: in response to the detected pressure value being less than the preset pressure value, controlling the volume of the space containing the gas to decrease to control the pressure value in the gas chamber 10 to increase.

[0097] Since the pressure value in the gas chamber 10 can be adjusted according to the relationship between the pressure value and the preset pressure value. Therefore, please continue to refer to Figure 7B , step S20 may include: Step S201: Determine whether the detected pressure value is equal to the preset pressure value; Step S202A: When it is determined that the detected pressure value is not equal to the preset pressure value, determine whether the detected pressure value is greater than the preset pressure value; Step S203A: When it is determined that the detected pressure value is greater than the preset pressure value, generate a first pressure regulation signal; Step S204A: Generate a first drive control signal according to the first pressure regulation signal, and control the volume of the space containing the gas to increase according to the first drive control signal to control the pressure value in the gas chamber 10 to decrease.

[0098] Among them, step S201, step S202A and step S203A can be executed by the control module 30, and step S204A can be executed by the pressure adjustment module.

[0099] Optionally, the pressure detection module 20 may be a device such as a pressure sensor that can implement pressure detection, and the control module 30 may include devices with logical processing functions such as a processor and a system-on-chip.

[0100] Optionally, the pressure adjustment module includes a drive control unit 401 and a forward and backward adjustment unit 402. The drive control unit 401 includes a rotating shaft, and the forward and backward adjustment unit 402 includes a drive assembly 4021 and a displacement assembly 4022. The drive assembly 4021 includes a first transmission gear 4021A and a second transmission gear 4021B, and the displacement assembly 4022 includes a connecting member 4022A, a first displacement member 4022B, and a second displacement member 4022C. Correspondingly, step S204A may include: Step S2041A: Generate a first drive control signal according to the first pressure adjustment signal to drive the rotating shaft of the drive control unit 401 to rotate in a first direction; Step S2042A: The rotating shaft drives the first transmission gear 4021A to rotate in the first direction and drives the second transmission gear 4021B to rotate in a third direction perpendicular to the first direction; Step S2043A: The rotation of the second transmission gear 4021B drives the second displacement member 4022C to move away from the air chamber 10 and drives the first displacement member 4022B to move away from the air chamber 10 in the receiving cavity of the connecting member 4022A to control the pressure value in the air chamber 10 to decrease.

[0101] Optionally, the drive control unit 401 is a motor, the first displacement member 4022B is a lead screw piston, and the second displacement member 4022C is a lead screw.

[0102] Please continue to refer to Figure 7B , after step S201, the automatic pressure regulation method may further include: Step S202B: When it is determined that the detected pressure value is equal to the preset pressure value, do not adjust the pressure value in the air chamber 10.

[0103] Please continue to refer to Figure 7B , after step S202A, the automatic pressure regulation method may further include: Step S203B: When it is determined that the detected pressure value is less than the preset pressure value, generate a second pressure adjustment signal; Step S204B: Generate a second drive control signal according to the second pressure adjustment signal and control the volume of the space containing the gas to decrease according to the second drive control signal to control the pressure value in the air chamber 10 to increase.

[0104] Among them, step S203B may be executed by the control module 30, and step S204B may be executed by the pressure adjustment module.

[0105] Optionally, step S204B may include: Step S2041B: Generate a second drive control signal according to the second pressure regulation signal to drive the rotation shaft of the control unit 401 to rotate in the second direction; Step S2042B: The rotation shaft drives the first transmission gear 4021A to rotate in the second direction and drives the second transmission gear 4021B to rotate in the fourth direction perpendicular to the second direction; Step S2043B: The rotation of the second transmission gear 4021B drives the second displacement member 4022C to move towards the gas chamber 10 and drives the first displacement member 4022B to move towards the gas chamber 10 in the receiving cavity of the connecting member 4022A to control the pressure value in the gas chamber 10 to rise.

[0106] Optionally, to ensure the safe operation of the gas-insulated switchgear, an alarm function may also be set. Accordingly, please continue to refer to Figure 7C After step S10, the following steps are further included: Step S10A: Determine whether the detected pressure value is less than a first preset warning value; wherein, the first preset warning value is less than the preset pressure value; Step S11A: Generate a first alarm signal when it is determined that the detected pressure value is less than the first preset warning value; Step S12A: Output an underpressure fault message according to the first alarm signal.

[0107] Among them, step S10A and step S11A can be executed by the control module 30, and step S12A can be executed by the information notification module 50 of the automatic voltage regulating device. By the cooperation of the information notification module 50 and the control module 30, a first alarm message can be issued when the pressure value in the gas chamber 10 is lower than the first preset warning value, so that maintenance personnel can be informed of the pressure situation in the gas chamber 10 in time when the pressure value in the gas chamber 10 is too low.

[0108] Step S10A can be executed before step S201. For example, when it is determined that the detected pressure value is greater than the first preset warning value, step S201 is executed. Step S10A can also be executed synchronously with step S201. Accordingly, when it is determined that the detected pressure value is greater than the first preset warning value, the control signal does not generate a first alarm signal.

[0109] Please continue to refer to Figure 7C After step S10, the following steps are further included: Step S10B: Determine whether the detected pressure value is greater than a second preset warning value; wherein, the second preset warning value is greater than the preset pressure value; Step S11B: Generate a second alarm signal when it is determined that the detected pressure value is greater than the second preset warning value; Step S12B: Output overvoltage fault information according to the second alarm signal.

[0110] Among them, the control module 30 can execute Step S10B and Step S11B, and the information notification module 50 of the automatic voltage regulating device can execute Step S12B. By cooperating the information notification module 50 with the control module 30, when the pressure value in the gas chamber 10 is greater than the second preset warning value, a first alarm message can be sent, so that maintenance personnel can be informed of the pressure situation in the gas chamber 10 in time when the pressure value in the gas chamber 10 is too high.

[0111] Step S10B can be executed before Step S201. For example, when it is determined that the detected pressure value is less than the second preset warning value, Step S201 is executed. Step S10B can also be executed synchronously with Step S201. Correspondingly, when it is determined that the detected pressure value is less than the second preset warning value, the control signal does not generate a second alarm signal.

[0112] Optionally, the information notification module 50 includes at least one of a speaker, a display, etc., so that the undervoltage fault information and the overvoltage fault information can be transmitted in ways such as sound, image, etc.

[0113] Optionally, to improve the operation safety of the gas-insulated switchgear, the pressure value growth rate in the gas chamber 10 can be monitored to reduce the probability of problems such as explosion of the gas chamber 10 and equipment damage caused by too fast growth rate of the pressure value in the gas chamber 10. Please continue to refer to Figure 7D , after Step S10, it further includes: Step S10C: According to the detected pressure value, judge whether the growth rate of the pressure value in the gas chamber 10 is greater than the preset rate; Step S11C: When it is determined that the growth rate of the pressure value in the gas chamber 10 is greater than the preset rate, release the gas in the gas chamber 10 through the pressure relief valve provided on the gas chamber 10.

[0114] Among them, the control module 30 can execute Step S10C, and Step S11C can be executed manually or with the help of other tools. The preset rate can be set according to actual needs.

[0115] Optionally, when it is determined that the growth rate of the pressure value in the gas chamber 10 is greater than the preset rate, the volume of the space for containing gas can be quickly increased through the automatic voltage regulating device 100, so as to reduce the rising rate of the gas pressure value as much as possible at the initial stage of the sharp increase of the pressure value in the gas chamber 10, and reserve more time for the opening of the pressure relief valve.

[0116] Optionally, when it is determined that the growth rate of the pressure value in the gas chamber 10 is greater than the preset rate, a third alarm signal can be generated, and pressure growth rate fault information can be output according to the third alarm signal, so that maintenance personnel can notice the information of abnormal growth rate as early as possible.

[0117] When it is determined that the growth rate of the pressure value in the air chamber 10 is less than the preset rate, there is no need to release the gas in the air chamber 10 through the pressure relief valve.

[0118] Optionally, when the gas filled in the air chamber 10 is different from air, it is also necessary to fill the air chamber 10 with the required gas in advance. Accordingly, please continue to refer to Figure 7D , before step S10, it further includes: Step S01: Fill the air chamber 10 with gas through the intake valve provided on the air chamber 10.

[0119] It can be understood that for the automatic pressure regulation method provided in this application, since any of the above-mentioned automatic pressure regulation devices is used to regulate the pressure of the air chamber, therefore, the automatic pressure regulation method has all the beneficial effects of the above-mentioned automatic pressure regulation device, and will not be elaborated here.

[0120] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic voltage regulating device, characterized in that: Used to adjust the pressure in the gas chamber, the gas chamber is used to contain gas; the automatic pressure regulating device includes: A pressure detection module, the pressure detection module is at least partially disposed in the air chamber and is used to detect the pressure value in the air chamber; a control module, electrically connected to the pressure detection module, configured to receive the pressure value detected by the pressure detection module, and generate a pressure adjustment signal according to the pressure value and a preset pressure value; and The pressure regulating module is communicated with the gas chamber and electrically connected with the control module, and is configured to adjust the volume of the space containing the gas according to the received pressure regulating signal to adjust the pressure value in the gas chamber.

2. The automatic voltage regulating device according to claim 1, characterized in that: The pressure regulating module comprises: a driving control unit, electrically connected to the control module and configured to generate a driving control signal according to the received pressure adjustment signal; The advance and retreat regulating unit is electrically connected to the driving control unit and communicated with the gas chamber, and is configured to control the volume of the space containing the gas to increase or decrease according to the received driving control signal to adjust the pressure value in the gas chamber.

3. The automatic voltage regulating device according to claim 2, characterized in that: The advance and retreat adjustment unit comprises: a driving component connected to the driving control unit and configured to generate a displacement control signal according to the driving control signal; The displacement component is movably connected to the driving component and is configured to move in a direction away from or close to the air chamber according to the displacement control signal to control the pressure value in the air chamber to decrease or increase.

4. The automatic voltage regulating device according to claim 3, characterized in that: The displacement assembly comprises: A connecting piece, comprising a receiving cavity communicated with the air chamber; a first displacement member, located in the accommodating cavity and abutting against an inner wall of the accommodating cavity; and A second displacement member, movably connected to the driving assembly and extending into the accommodating cavity to be fixedly connected to the first displacement member; Wherein, when the pressure value is greater than the preset pressure value, the first displacement member is configured to move in the accommodating cavity in a direction away from the air chamber under the drive of the second displacement member, so as to control the pressure value in the air chamber to decrease; When the pressure value is less than the preset pressure value, the first displacement member is configured to move in the accommodating cavity toward the air chamber under the drive of the second displacement member, so as to control the pressure value in the air chamber to increase.

5. The automatic voltage regulating device according to claim 4, characterized in that: The driving control unit comprises a rotating shaft, and the surface of the second displacement member is provided with a first thread; the driving assembly comprises: A first transmission gear, fixedly connected to the rotating shaft of the driving control unit, and a second thread is provided on the surface of the first transmission gear; The second transmission gear is sleeved on the second displacement member, the inner surface of the second transmission gear is provided with a third thread meshing with the first thread, and the outer surface of the second transmission gear is provided with a fourth thread meshing with the second thread.

6. The automatic voltage regulating device according to claim 4, characterized in that: The air chamber has a first through hole; the connecting member comprises: A transition connector comprises a first connection portion and a second connection portion which are fixedly connected, wherein at least a portion of the first connection portion is sleeved in the first through hole and abuts against an inner wall of the first through hole; the transition connector is provided with a second through hole which is connected to the first through hole along a direction from the first connection portion to the second connection portion; A first shell is fixedly connected to the second connecting portion, and the first shell is provided with a third through hole along a direction from the first connecting portion to the second connecting portion; Wherein, the second through hole and the third through hole are connected to form the accommodating cavity.

7. A gas insulated switchgear, characterized in that: include: The automatic voltage regulating device according to any one of claims 1 to 6; as well as The gas chamber is used to contain the gas, and the gas chamber is connected to the pressure regulating module of the automatic pressure regulating device; Wherein, the automatic pressure regulating device is used to adjust the pressure in the air chamber.

8. A method for automatic voltage regulation, characterized in that: For adjusting the pressure of the gas chamber of the gas insulated switchgear according to claim 7, the automatic pressure regulation method comprises: Detecting the pressure value in the air chamber; In response to the detected pressure value being greater than a preset pressure value, controlling the volume of the space containing the gas to increase so as to control the pressure value in the gas chamber to decrease; Alternatively, in response to the detected pressure value being less than the preset pressure value, the volume of the space accommodating the gas is controlled to decrease, so as to control the pressure value in the gas chamber to increase.

9. The method for automatic voltage regulation according to claim 8, characterized in that: After the step of detecting the pressure value in the air chamber, the method further includes: Determine whether the detected pressure value is less than a first preset warning value; wherein the first preset warning value is less than the preset pressure value; When it is determined that the detected pressure value is less than the first preset warning value, a first alarm signal is generated; Output undervoltage fault information according to the first alarm signal.

10. The method for automatic voltage regulation according to claim 8, characterized in that: After the step of detecting the pressure value in the air chamber, the method further includes: Determine whether the detected pressure value is greater than a second preset warning value; wherein the second preset warning value is greater than the preset pressure value; When it is determined that the detected pressure value is greater than the second preset warning value, a second alarm signal is generated; Output overvoltage fault information according to the second alarm signal.

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