Insulator, gas-insulated full enclosed combined electric appliance and use

Abstract

The application discloses an insulator, a gas-insulated fully-closed combined electric appliance and use, and relates to the technical field of insulators; the insulator comprises an insulator body, a ventilation hole, a valve, a controller, a first air pressure gauge and a second air pressure gauge, one end of the ventilation hole is connected with a first chamber for conduction, the other end of the ventilation hole is connected with a second chamber for conduction, the first air pressure gauge is used for obtaining the air pressure of the first chamber, the second air pressure gauge is used for obtaining the air pressure of the second chamber, the valve is an electric valve and is used for making the ventilation hole conductive or closed, the first air pressure gauge is connected with the controller and communicates with the controller, the second air pressure gauge is connected with the controller and communicates with the controller, and the controller is connected with the electric valve and communicates with the electric valve; the gas-insulated fully-closed combined electric appliance is formed by the insulator, and the use comprises supplementing air to a chamber with lower air pressure through a chamber with higher air pressure on the side of the insulator, and is used for increasing the air pressure of the chamber with lower air pressure on the side of the insulator, so as to maintain the normal work of GIS.

Description

Technical Field

[0001] This invention relates to the field of insulator technology, and more particularly to an insulator, a gas-insulated fully enclosed combined electrical appliance, and its application. Background Technology

[0002] The author conducted a search using the search terms TTL_ALL:(insulator) AND TACD_ALL:(hole AND air chamber AND on AND off), and obtained the following relatively similar existing technical solutions.

[0003] The authorization announcement number is CN113130150B, and the name is "GIS and its insulators." It includes: an insulator body with a gas passage for gas flow; a control valve disposed within the gas passage for controlling the opening and closing of the gas passage; when the control valve controls the gas passage to open, the insulator body is in a conductive state; when the control valve controls the gas passage to close, the insulator body is in an isolated state. During operation, the insulator can be adjusted as needed to interchange between ventilated and non-ventilated states. Specifically, when it is necessary to reduce the pressure or perform maintenance on one of the components located in the same gas chamber, the gas passage can be closed, isolating the insulator body. At this time, other components are unaffected, and the component requiring pressure reduction or maintenance can be released individually, greatly reducing the leakage area, reducing the amount of GIS docking work, and reducing equipment downtime.

[0004] The authorization announcement number is CN104849630B, and the name is "A Device for Measuring Defects in Basin-Type Insulators of Gas-Insulated Switchgear". The device includes three bushings, three busbar rods, and multiple basin-type insulators. The three bushings are placed on the gas-insulated switchgear housing, and the multiple basin-type insulators are fixed inside the housing. A gas chamber is formed between adjacent basin-type insulators, and the gas chamber is equipped with a gas sampling hole and an observation window. Three through holes are opened on each basin-type insulator. One end of each of the three busbar rods is connected to the high-voltage line, and the other end enters the gas-insulated switchgear housing through the three bushings and extends through the three through holes to be fixed inside the housing. This device can simultaneously monitor SF6 gas decomposition products under three different defect conditions, and ensures high consistency of test conditions such as applied voltage amplitude, voltage rise / fall process, and pressurization time for basin-type insulator defects, significantly improving the testing efficiency for different defects and the utilization rate of the test system.

[0005] The authorization announcement number is CN206312664U, entitled "A Basin-Type Insulator for Instrument Transformers with Multiple Vent Holes." It includes a basin-shaped insulating casting body. Multiple sets of vent holes are provided at the inflection point of the S-shaped bend in the middle of the basin-shaped insulating casting body. Connecting devices for connecting to external equipment are provided on the upper and bottom surfaces of the basin-shaped insulating casting body. The connecting devices include recesses on the upper and bottom surfaces of the basin-shaped insulating casting body and inserts disposed within the recesses. The top and middle of the insert are provided with locking elements for engaging with the inner wall of the recess. A cavity is provided in the middle of the insert, and threads are provided on the inner wall of the cavity. A glass mesh is provided between the insert and the recess. The purpose is to provide a more reliable basin-type insulator for instrument transformers with multiple vent holes.

[0006] Based on the above three patent documents and existing technical solutions, the inventors have learned the following prior art solutions.

[0007] SF6 gas possesses excellent arc-extinguishing properties, good insulation performance, and good chemical stability, and is commonly used as an arc-extinguishing and insulating medium in ultra-high voltage and extra-high voltage electrical equipment. GIS equipment, short for Gas Insulated Switchgear, consists of circuit breakers, disconnect switches, grounding switches, voltage transformers, current transformers, surge arresters, busbars, etc. All these devices or components are enclosed in an aluminum alloy or steel casing filled with pressurized SF6 gas, completely isolating them from the outside environment due to the well-sealed metal casing. GIS equipment offers advantages such as high power supply reliability, small footprint, short construction period, low noise, low losses, and fire and explosion protection, gaining widespread acceptance in the power industry.

[0008] GIS basin insulators are divided into partition basins (also known as dead basins) and through-hole basins (also known as live basins). In a dead basin, gas exchange between the two chambers is impossible, while in a live basin, gas can freely flow between the two chambers through the vent holes. Each chamber in a GIS is separated by a dead basin, forming an independent maintenance unit.

[0009] The inventors analyzed and found the following technical problems in the existing technical solutions.

[0010] GIS equipment requires minimal maintenance during normal operation, only requiring periodic inspections and routine tests. However, air leaks in GIS electrical equipment are a frequent occurrence. The specific causes of these leaks are numerous, including factors related to design, construction, manufacturing, installation, and the on-site operating environment. Currently, common causes of air leaks in GIS equipment include pinholes in the casing, improper flange tightening, aging seals, substandard welds, and problems with the casing material itself.

[0011] The main problems are as follows:

[0012] 1. Air leakage in the air chamber seriously threatens the safe and stable operation of GIS equipment.

[0013] Once GIS equipment leaks, it can lead to problems such as decreased internal insulation strength, moisture infiltration, and low SF6 pressure alarms, severely impacting the operation of the GIS equipment. Currently, handling leaks in GIS equipment often requires on-site maintenance by repair personnel. The severity of the leak is closely related to the leakage rate and the volume of the gas chamber. For gas chambers of the same volume, the faster the leakage rate, the easier it is for the chamber to reach the alarm pressure, which is more dangerous; conversely, for the same leakage rate, the smaller the gas chamber volume, the easier it is for the chamber to reach the alarm pressure, which is also more dangerous. Therefore, small-volume gas chambers with large leakage rates pose the most serious threat to electrical equipment.

[0014] 2. SF6 has low inflation efficiency.

[0015] When building a new GIS in a substation, it is necessary to pressurize each air chamber to the maximum inflation pressure. This often requires inflating each air chamber one by one, which is inefficient.

[0016] There is an urgent need for a device to solve these two problems.

[0017] Existing technical issues and considerations:

[0018] How to solve the technical problem of increasing the air pressure in the air chamber with low air pressure on the insulator side. Summary of the Invention

[0019] The technical problem to be solved by the present invention is to provide an insulator, a gas-insulated fully enclosed combined electrical appliance and its application, and to solve the technical problem of increasing the gas pressure of the gas chamber with low gas pressure on the insulator side.

[0020] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: an insulator includes an insulator body, a vent hole, and a valve, and further includes a controller, a first barometer, and a second barometer. One side of the insulator body is used to be adjacent to a first chamber, and the other side of the insulator body is used to be adjacent to a second chamber. One end of the vent hole is connected and conductive to the first chamber, and the other end of the vent hole is connected and conductive to the second chamber. The first barometer is located in the first chamber and is used to obtain the air pressure of the first chamber. The second barometer is located in the second chamber and is used to obtain the air pressure of the second chamber. The valve is an electric valve installed on the insulator body and is used to open or close the vent hole. The first barometer is connected and communicates with the controller, the second barometer is connected and communicates with the controller, and the controller is connected and communicates with the electric valve.

[0021] A further technical solution includes a pressure replenishment module, used by the controller to obtain the first chamber pressure data sent by the first barometer and the second chamber pressure data sent by the second barometer. When the first chamber pressure data is less than or equal to the low pressure alarm threshold of the first chamber, and the second chamber pressure data is greater than or equal to the first chamber pressure data and the second chamber pressure data is greater than or equal to the low pressure alarm threshold of the second chamber, the controller notifies the electric valve to operate and opens the vent. At this time, the electric valve is in the first state.

[0022] A further technical solution is that the pressure replenishment module is also used by the controller to allow the electric valve to remain in the first state until the air pressure data of the first chamber is greater than the low air pressure alarm threshold of the first chamber or the air pressure data of the second chamber is less than or equal to the low air pressure alarm threshold of the second chamber. The controller then notifies the electric valve to operate and close the vent. At this time, the electric valve is in the second state.

[0023] A further technical solution is as follows: the electric valve includes a magnetic wrench and a concealed screw. The magnetic wrench is fixedly connected to the insulator body, and the magnetic wrench and the concealed screw are magnetically connected. The concealed screw is threadedly connected to the insulator body. The controller is connected to and communicates with the magnetic wrench. When the controller controls the magnetic field inside the magnetic wrench to rotate clockwise, the rotating magnetic field drives the concealed screw to rotate clockwise and screw it into the insulator body. The concealed screw approaches and covers the vent hole, thus closing the vent hole. When the controller controls the magnetic field inside the magnetic wrench to rotate counterclockwise, the rotating magnetic field drives the concealed screw to rotate counterclockwise and screw it out of the insulator body. The concealed screw opens and moves away from the vent hole, thus opening the vent hole.

[0024] A further technical solution is as follows: the concealed screw includes a screw rod, a nut, and a first set of magnets. The screw rod is fixedly connected to the nut and threadedly connected to the insulator body. The first set of magnets is fixedly connected to the nut, and the nut can be closed onto or detached from the vent hole. The magnetic wrench includes a motor and a second set of magnets. The motor is fixedly connected to the insulator body, and the second set of magnets is fixedly connected to the motor's shaft. The controller is connected to and communicates with the motor. The axis of the motor's shaft is parallel to the axis of the nut, and the rotation axis of the first set of magnets is parallel to the rotation axis of the second set of magnets. The first set of magnets and the second set of magnets are magnetically connected.

[0025] A further technical solution includes a sealing gasket, which is sleeved with the concealed screw. The sealing gasket is located between the concealed screw and the vent hole, and the concealed screw is covered by the sealing gasket on the vent hole.

[0026] A further technical solution is that the control terminal of the controller is electrically connected to the control terminal of the motor, and the screw and nut are fixedly connected together to form a T-shaped structure.

[0027] A further technical solution is that the controller is a microcontroller, the first barometer is electrically connected to the controller, and the second barometer is electrically connected to the controller.

[0028] A gas-insulated fully enclosed combined electrical appliance, which is formed based on the above-mentioned insulator.

[0029] One application, based on the above-mentioned insulator, includes supplying air to a chamber with lower air pressure through a chamber with higher air pressure on the insulator side, for the purpose of increasing the air pressure of the chamber with lower air pressure on the insulator side.

[0030] The beneficial effects of adopting the above technical solution are as follows:

[0031] First, an insulator includes an insulator body, a vent, and a valve. It also includes a controller, a first barometer, and a second barometer. One side of the insulator body is adjacent to a first chamber, and the other side is adjacent to a second chamber. One end of the vent is connected to and conducts through the first chamber, and the other end is connected to and conducts through the second chamber. The first barometer is located in the first chamber and is used to obtain the air pressure in the first chamber. The second barometer is located in the second chamber and is used to obtain the air pressure in the second chamber. The valve is an electrically operated valve installed on the insulator body and is used to open or close the vent. The first barometer is connected to and communicates with the controller, the second barometer is connected to and communicates with the controller, and the controller is connected to and communicates with the electrically operated valve. This technical solution, based on the structure of this insulator, allows for the next step of replenishing air to a lower-pressure chamber through a chamber with higher air pressure on the insulator side, thereby increasing the air pressure in the lower-pressure chamber on the insulator side and maintaining the normal operation of the GIS (Gas Insulator System).

[0032] Secondly, it also includes a pressure replenishment module, used by the controller to obtain first chamber pressure data from the first barometer and second chamber pressure data from the second barometer. When the first chamber pressure data is less than or equal to the low pressure alarm threshold of the first chamber, and the second chamber pressure data is greater than both the first and second chamber pressure data and the low pressure alarm threshold of the second chamber, the controller notifies the electric valve to activate and open the vent. At this time, the electric valve is in its first state. This technical solution optimizes the judgment conditions and thus the air replenishment steps, further ensuring the normal operation of the GIS with greater precision.

[0033] Third, the pressure replenishment module is also used by the controller to allow the electric valve to remain in the first state until the air pressure data of the first chamber is greater than the low air pressure alarm threshold of the first chamber or the air pressure data of the second chamber is less than or equal to the low air pressure alarm threshold of the second chamber. At this time, the controller notifies the electric valve to activate and close the vent. The electric valve is then in the second state. This technical solution further optimizes the judgment conditions and thus the air replenishment steps, ensuring the normal operation of the GIS with greater precision.

[0034] Fourth, the electric valve includes a magnetic wrench and a concealed screw. The magnetic wrench is fixedly connected to the insulator body, and the magnetic wrench and the concealed screw are magnetically connected. The concealed screw is threadedly connected to the insulator body. The controller is connected to and communicates with the magnetic wrench. When the controller controls the magnetic field inside the magnetic wrench to rotate clockwise, the rotating magnetic field drives the concealed screw to rotate clockwise and screw it into the insulator body. The concealed screw approaches and covers the vent hole, thus sealing the vent hole. When the controller controls the magnetic field inside the magnetic wrench to rotate counterclockwise, the rotating magnetic field drives the concealed screw to rotate counterclockwise and screw it out of the insulator body. The concealed screw opens and moves away from the vent hole, allowing the vent hole to open. This technical solution cleverly uses a magnetic wrench and a concealed screw to control the state of the vent hole. No wiring is required between the magnetic wrench and the concealed screw, which does not affect the airtightness of the chamber wall, making it less prone to leakage and ensuring the airtightness of the chamber wall, further ensuring the normal operation of the GIS.

[0035] Fifth, it also includes a sealing gasket, which is sleeved with the concealed screw and located between the concealed screw and the vent hole. The concealed screw is secured to the vent hole by the sealing gasket. This technical solution, using a sealing gasket, further ensures the sealing effect of the vent hole, resulting in a better seal.

[0036] Sixth, a gas-insulated fully enclosed switchgear, based on the aforementioned insulators, forms a gas-insulated fully enclosed switchgear. This technical solution increases the gas pressure in the chamber with lower gas pressure by supplying gas to the chamber with higher gas pressure on the insulator side, thereby maintaining the normal operation of the GIS.

[0037] Seventh, an application based on the above-mentioned insulator, including replenishing air to a chamber with lower air pressure through a chamber with higher air pressure on the insulator side, in order to increase the air pressure of the chamber with lower air pressure on the insulator side, thereby maintaining the normal operation of the GIS.

[0038] See the detailed implementation section for further description. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the principle of the present invention;

[0040] Figure 2 This is a structural diagram of the controllable insulating basin of the present invention;

[0041] Figure 3 This is a structural diagram of the first set of magnets;

[0042] Figure 4 This is a structural diagram of a magnetic bolt;

[0043] Figure 5 This is a structural diagram of a magnetic force source;

[0044] Figure 6This is a structural diagram of the second set of magnets;

[0045] Figure 7 This is an assembly drawing of the present invention;

[0046] Figure 8 This is a flowchart for determining the air chamber pressure.

[0047] The components are: 1. Basin-type insulator, 2. Vent hole, 3. Threaded hole, 4. Magnetic source mating surface, 5. Magnetic bolt base, 6. Magnetic bolt magnet S pole, 7. Magnetic bolt magnet N pole, 8. Magnetic bolt screw, 9. Magnetic bolt rubber pad, 10. Magnetic motor, 11. Magnetic motor shaft, 12. Magnetic source base, 13. Magnetic source magnet S pole, 14. Magnetic source magnet N pole. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0049] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0050] Example 1:

[0051] This invention discloses an insulator comprising an insulator body, a vent hole, a controller, a first barometer, and a second barometer. One side of the insulator body is adjacent to a first chamber, and the other side of the insulator body is adjacent to a second chamber. One end of the vent hole is connected to the first chamber and the other end is connected to the second chamber. The first barometer is located in the first chamber and is used to obtain the air pressure of the first chamber. The second barometer is located in the second chamber and is used to obtain the air pressure of the second chamber. The valve is an electric valve fixedly connected to the insulator body and is used to open or close the vent hole.

[0052] The electric valve includes a magnetic wrench and a concealed screw. The concealed screw includes a screw rod, a nut, a sealing gasket, and a first set of magnets. The screw rod and nut are fixedly connected together to form a T-shaped structure. The screw rod is threadedly connected to the insulator body. The first set of magnets is fixedly connected to the nut. The sealing gasket is sleeved on the screw rod and is located between the nut and the vent hole. The nut can be closed onto the vent hole or separated from it by the sealing gasket. The magnetic wrench includes a motor and a second set of magnets. The motor is fixedly connected to the insulator body. The second set of magnets is fixedly connected to the motor's shaft. The axis of the motor's shaft is parallel to the axis of the nut. The rotation axes of the first set of magnets are parallel to the rotation axes of the second set of magnets and are magnetically connected. The magnetic wrench is fixedly connected to the insulator body and magnetically connected to the concealed screw. The concealed screw is threadedly connected to the insulator body.

[0053] The controller is a microcontroller. The first barometer is electrically connected to and communicates with the controller, the second barometer is electrically connected to and communicates with the controller, and the control terminal of the controller is electrically connected to and communicates with the control terminal of the motor, thereby enabling the controller to connect and communicate with the magnetic board flashlight.

[0054] When the controller controls the magnetic field inside the magnetic wrench to rotate clockwise, the rotating magnetic field causes the invisible screw to rotate clockwise and screw into the insulator body. The invisible screw approaches and covers the vent hole, thus sealing the vent hole. When the controller controls the magnetic field inside the magnetic wrench to rotate counterclockwise, the rotating magnetic field causes the invisible screw to rotate counterclockwise and screw out of the insulator body. The invisible screw opens and moves away from the vent hole, thus opening the vent hole.

[0055] The improvement of Example 1 lies in the ingenious use of a magnetic wrench and a concealed screw as an electric valve to control the opening or closing of the vent hole. By supplying air to the chamber with lower air pressure through the chamber with higher air pressure on the insulator side, the air pressure of the chamber with lower air pressure on the insulator side is increased, thereby balancing the air pressure between the chambers.

[0056] Example 2:

[0057] The difference between Example 2 and Example 1 is that the electric valve is a solenoid valve.

[0058] This invention discloses an insulator comprising an insulator body, a vent hole, and a valve. The insulator further comprises a controller, a first barometer, and a second barometer. One side of the insulator body is adjacent to a first chamber, and the other side is adjacent to a second chamber. One end of the vent hole is connected to and conducts through the first chamber, and the other end is connected to and conducts through the second chamber. The first barometer is located in the first chamber and is used to obtain the air pressure in the first chamber. The second barometer is located in the second chamber and is used to obtain the air pressure in the second chamber. The valve is an electrically operated valve fixedly connected to the insulator body and is used to open or close the vent hole. The first barometer is connected to and communicates with the controller, the second barometer is connected to and communicates with the controller, and the controller is connected to and communicates with the electrically operated valve.

[0059] The electric valve is a solenoid valve. The controller is a microcontroller. The first barometer is electrically connected to and communicates with the controller, the second barometer is electrically connected to and communicates with the controller, and the control terminal of the controller is electrically connected to and communicates with the control terminal of the solenoid valve.

[0060] The controller, barometer, and solenoid valve themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0061] The improvement of Example 2 is that the controller controls the solenoid valve to open or close, thereby controlling the ventilation hole to open or close, and replenishes the chamber with lower air pressure through the chamber with higher air pressure on the insulator side, so as to increase the air pressure of the chamber with lower air pressure on the insulator side, and thus balance the air pressure between the chambers.

[0062] Example 3:

[0063] The present invention discloses an insulator. The insulator based on Embodiment 1 further includes a voltage compensation module, which is a program module.

[0064] The pressure compensation module is used by the controller to obtain the first chamber pressure data from the first barometer and the second chamber pressure data from the second barometer. When the first chamber pressure data is less than or equal to the low pressure alarm threshold of the first chamber, and the second chamber pressure data is greater than both the first and second chamber pressure data and the low pressure alarm threshold of the second chamber, the controller notifies the electric valve to operate and open the vent. At this time, the electric valve is in the first state. The controller allows the electric valve to remain in the first state until the first chamber pressure data is greater than the low pressure alarm threshold of the first chamber or the second chamber pressure data is less than or equal to the low pressure alarm threshold of the second chamber. At this time, the controller notifies the electric valve to operate and close the vent. At this time, the electric valve is in the second state.

[0065] The improvement of Example 3 lies in the fact that, through program control, the working efficiency of air pressure balance is further improved, and the control effect of air pressure balance is further optimized.

[0066] Example 4:

[0067] The present invention discloses an insulator. The insulator based on Embodiment 2 further includes a voltage compensation module, which is a program module.

[0068] The pressure compensation module is used by the controller to obtain the first chamber pressure data from the first barometer and the second chamber pressure data from the second barometer. When the first chamber pressure data is less than or equal to the low pressure alarm threshold of the first chamber, and the second chamber pressure data is greater than both the first and second chamber pressure data and the low pressure alarm threshold of the second chamber, the controller notifies the electric valve to operate and open the vent. At this time, the electric valve is in the first state. The controller allows the electric valve to remain in the first state until the first chamber pressure data is greater than the low pressure alarm threshold of the first chamber or the second chamber pressure data is less than or equal to the low pressure alarm threshold of the second chamber. At this time, the controller notifies the electric valve to operate and close the vent. At this time, the electric valve is in the second state.

[0069] The improvement of Example 4 lies in the fact that, through program control, the working efficiency of air pressure balance is further improved, and the control effect of air pressure balance is further optimized.

[0070] Example 5:

[0071] This invention discloses a gas-insulated fully enclosed combined electrical appliance, comprising an insulator, circuit breaker, disconnector, grounding switch, voltage transformer, current transformer, surge arrester, and busbar, forming a gas-insulated fully enclosed combined electrical appliance.

[0072] Example 6:

[0073] This invention discloses a gas-insulated fully enclosed combined electrical appliance, comprising an insulator, circuit breaker, disconnector, grounding switch, voltage transformer, current transformer, surge arrester, and busbar, as described in Example 2, forming a gas-insulated fully enclosed combined electrical appliance.

[0074] Example 7:

[0075] This invention discloses a gas-insulated fully enclosed combined electrical appliance, comprising an insulator, circuit breaker, disconnector, grounding switch, voltage transformer, current transformer, surge arrester, and busbar, as described in Example 3, forming a gas-insulated fully enclosed combined electrical appliance.

[0076] Example 8:

[0077] This invention discloses a gas-insulated fully enclosed combined electrical appliance, comprising an insulator, circuit breaker, disconnector, grounding switch, voltage transformer, current transformer, surge arrester, and busbar, as described in Example 4, forming a gas-insulated fully enclosed combined electrical appliance.

[0078] Example 9:

[0079] The present invention discloses an apparatus with a use based on any one of embodiments 1 to 8, which replenishes air to a chamber with lower air pressure through a chamber with higher air pressure on the insulator side, thereby increasing the air pressure of the chamber with lower air pressure on the insulator side.

[0080] The concept of this application:

[0081] Replace the dead insulator between the two air chambers with a controllable basin insulator:

[0082] 1. When the pressure in the first chamber is lower than the first threshold pressure of this chamber, it is necessary to replenish the first chamber with air in a timely manner. When the pressure in the adjacent second chamber is higher than the pressure in the first chamber plus 0.01 MPa, and the pressure in the second chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa), the processor controls the first magnetic valve on the No. 1 basin-type insulator between the two chambers to open, and the second chamber replenishes the first chamber with air until the pressure in the first chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa), at which point the first magnetic valve closes. During this period, it is essential to ensure that the pressure in the adjacent second chamber is higher than the pressure in the first chamber plus 0.01 MPa, and that the pressure in the second chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa). If this cannot be guaranteed, the magnetic valve between the two chambers will be closed.

[0083] 2. All newly built GIS bay dead-cell insulators are controlled-capacity insulators. At this time, air can be filled through any air chamber. The controlled-capacity insulators will automatically push the pressure of each air chamber to the third threshold of the corresponding air chamber, thereby improving the air filling efficiency and reducing the air filling risk.

[0084] Technical solution description:

[0085] Based on the maximum pressure, rated pressure, and low-pressure alarm pressure of different air chambers, set the corresponding third threshold, second threshold, and first threshold. The maximum air pressure threshold is the third threshold, the rated air pressure threshold is the second threshold, and the low-pressure alarm threshold is the first threshold. Maximum air pressure threshold > Rated air pressure threshold > Low-pressure alarm threshold.

[0086] ① Overall approach:

[0087] Replace the dead insulator between the two chambers with a controllable basin insulator. The first chamber is the first air chamber, and the second chamber is the second air chamber.

[0088] 1. When the pressure in the first chamber is lower than the first threshold pressure of this chamber, it is necessary to replenish the first chamber with air in a timely manner. When the pressure in the adjacent second chamber is higher than the pressure in the first chamber plus 0.01 MPa, and the pressure in the second chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa), the processor controls the first magnetic valve on the No. 1 basin-type insulator between the two chambers to open, and the second chamber replenishes the first chamber with air until the pressure in the first chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa), at which point the first magnetic valve closes. During this period, it is essential to ensure that the pressure in the adjacent second chamber is higher than the pressure in the first chamber plus 0.01 MPa, and that the pressure in the second chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa). If this cannot be guaranteed, the magnetic valve between the two chambers will be closed.

[0089] 2. All newly built GIS bay dead-cell insulators are controlled-capacity insulators. At this time, air can be filled through any air chamber. The controlled-capacity insulators will automatically push the pressure of each air chamber to the third threshold of the corresponding air chamber, thereby improving the air filling efficiency and reducing the air filling risk.

[0090] ② Principle block diagram

[0091] like Figure 1 As shown, the processor is connected to the pressure gauges of the first to nth chambers, the first to mth magnetic valves, a display, and buttons. The processor collects the chamber pressures from the pressure gauges of the first to nth chambers and controls the opening and closing of the first to mth magnetic valves based on these pressures. This enables automatic pressure replenishment for chambers below a first threshold, while simultaneously displaying "First low-pressure alarm chamber leaking." The buttons allow setting the third, second, and first thresholds for different chambers based on their maximum pressure, rated pressure, and low-pressure alarm pressure.

[0092] A chamber is a gas chamber, a barometer is a pressure gauge, a controller is a processor, and an electric valve is a magnetic valve.

[0093] ③ Principle of magnetic control valve:

[0094] like Figure 2 As shown, the controllable insulating basin structure has ventilation holes 2 and threaded holes 3 on the edge of the insulating basin compared with ordinary insulating basins. On the outside of the basin, a magnetic source contact surface 4 is axially arranged with the ventilation holes 2.

[0095] The insulator of the present invention is a controllable insulating basin. The insulator body is the body of the basin-type insulator 1. A threaded hole is provided on the insulator body, and a screw is threadedly connected to the threaded hole.

[0096] like Figure 3 The image shown is a top view of a magnetic bolt. The base of the magnetic bolt is equipped with a magnetic bolt magnet, which has two poles: N and S.

[0097] The invisible screw is a magnetic bolt, the nut is the magnetic bolt base 5, and the S pole 6 and N pole 7 of the magnetic bolt magnet form the first set of magnets.

[0098] like Figure 4 The figure shows a cross-sectional view of a magnetic bolt. The magnetic bolt base 5 has a magnetic bolt on the upper part and a magnetic bolt pad 9 on the lower part. The magnetic bolt base 5 has a magnetic bolt screw 8 underneath.

[0099] The nut is the magnetic bolt base 5, the screw is the magnetic bolt screw 8, and the sealing gasket is the magnetic bolt rubber gasket 9.

[0100] like Figure 5 The diagram shows a cross-sectional view of the magnetic source. The magnetic source base 12 has a magnetic source magnet mounted on its top, which has two poles: N and S. The magnetic source base 12 is connected to the magnetic motor shaft 11, and the magnetic motor 10 can drive the magnetic source to rotate through the magnetic motor shaft 11.

[0101] The magnetic wrench is the magnetic source, the motor is the magnetic motor 10, the motor shaft is the magnetic motor shaft 11, the magnetic source base 12 is fixedly connected to the magnetic motor shaft 11, and the S pole 13 and N pole 14 of the magnetic source magnet are embedded and fixed on the magnetic source base 12 to form the second set of magnets.

[0102] 1. Basin-type insulator; 2. Vent hole; 3. Threaded hole; 4. Magnetic source mating surface; 5. Magnetic bolt base; 6. Magnetic bolt magnet S pole; 7. Magnetic bolt magnet N pole; 8. Magnetic bolt screw; 9. Magnetic bolt rubber washer; 10. Magnetic motor; 11. Magnetic motor shaft; 12. Magnetic source base; 13. Magnetic source magnet S pole; 14. Magnetic source magnet N pole.

[0103] like Figure 6 The image shown is a top view of the magnetic source.

[0104] like Figure 7 As shown, the magnetic motor is fixed to the GIS surface, the magnetic source base 12 is attached to the magnetic source contact surface 4, and the magnetic motor shaft 11 is perpendicular to the insulating basin.

[0105] The magnetic bolt 8 is inserted into the threaded hole 3. Controlling the rotation of the magnetic motor causes the magnetic source to rotate along with the motor shaft, and the N and S poles of the magnetic bolt rotate along with the magnetic source under the influence of electromagnetic force. Tightening the magnetic bolt involves pressing the rubber gasket against the vent hole, making the insulator a dead chamber; loosening the magnetic bolt releases the rubber gasket, opening the vent hole, and the insulator becomes a vent.

[0106] ④ Control Flowchart

[0107] like Figure 8As shown, the system determines whether the gauge pressure of the first chamber is lower than the first threshold of that chamber. If not, the magnetic valve between the first and second chambers remains normally closed. If yes, the system continues to determine the pressure of the adjacent second chamber. When the pressure of the second chamber is higher than the pressure of the first chamber plus 0.01 MPa, and the pressure of the second chamber is higher than (the first threshold of that chamber + 0.01 MPa), the magnetic valve between the first and second chambers is opened. The first and second chambers are then connected, and gas from the second chamber is injected into the first chamber until the pressure of the first chamber is higher than (the first threshold of that chamber + 0.01 MPa), at which point the first magnetic valve closes. The first and second chambers are then separated. During this process, it is ensured that the pressure of the adjacent second chamber is higher than the pressure of the first chamber plus 0.01 MPa, and that the pressure of the second chamber is higher than (the first threshold of that chamber + 0.01 MPa). If this cannot be guaranteed, the magnetic valve between the first and second chambers is closed.

[0108] After this application had been running internally for a period of time, the beneficial aspects reported by on-site technicians were:

[0109] 1. When the pressure in the first chamber is lower than the first threshold pressure of this chamber, it is necessary to replenish the first chamber with air in a timely manner. When the pressure in the adjacent second chamber is higher than the pressure in the first chamber plus 0.01 MPa, and the pressure in the second chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa), the processor controls the first magnetic valve on the No. 1 basin-type insulator between the two chambers to open, and the second chamber replenishes the first chamber with air until the pressure in the first chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa), at which point the first magnetic valve closes. During this period, it must be ensured that the pressure in the adjacent second chamber is higher than the pressure in the first chamber plus 0.01 MPa, and the pressure in the second chamber is higher than (the first threshold pressure of this chamber + 0.01 MPa). If this cannot be guaranteed, the magnetic valve between the first and second chambers will be closed.

[0110] 2. All newly built GIS bay dead-cell insulators are controlled-capacity insulators. At this time, air can be filled through any air chamber. The controlled-capacity insulators will automatically push the pressure of each air chamber to the third threshold of the corresponding air chamber, thereby improving the air filling efficiency and reducing the air filling risk.

[0111] This GIS replenishes air to chambers with lower pressure on the insulator side by supplying air to the chambers with higher pressure, thereby increasing the pressure in the chambers with lower pressure and maintaining normal operation of the GIS, extending its normal operating time. When air replenishment is needed, the GIS can share and send the replenishment information through the connected communication device. The management terminal receives the information, and maintenance personnel, after being notified of the situation through the management terminal, can monitor and track it as needed, and formulate corresponding maintenance plans if necessary.

[0112] Currently, the technical solution of this invention has undergone pilot testing, which is a small-scale trial of the product before large-scale mass production. After the pilot testing was completed, a user survey was conducted on a small scale, and the survey results showed that user satisfaction was high. Now, preparations have begun for the formal production and industrialization of the product (including intellectual property risk warning surveys).

Claims

1. An insulator, comprising an insulator body, a vent hole, and a valve, characterized in that: It also includes a controller, a first barometer, and a second barometer. One side of the insulator body is adjacent to the first chamber, and the other side of the insulator body is adjacent to the second chamber. One end of the vent hole is connected to the first chamber and the other end of the vent hole is connected to the second chamber. The first barometer is located in the first chamber and is used to obtain the air pressure of the first chamber. The second barometer is located in the second chamber and is used to obtain the air pressure of the second chamber. The valve is an electric valve installed on the insulator body and is used to open or close the vent hole. The first barometer is connected to and communicates with the controller. The second barometer is connected to and communicates with the controller. The controller is connected to and communicates with the electric valve. It also includes a pressure compensation module, used by the controller to obtain the first chamber pressure data sent by the first barometer and the second chamber pressure data sent by the second barometer. When the first chamber pressure data is less than or equal to the low pressure alarm threshold of the first chamber, and the second chamber pressure data is greater than both the first and second chamber pressure data and the low pressure alarm threshold of the second chamber, the controller notifies the electric valve to operate and open the vent. At this time, the electric valve is in the first state. The controller allows the electric valve to remain in the first state until the first chamber pressure data is greater than the low pressure alarm threshold of the first chamber or the second chamber pressure data is less than or equal to the low pressure alarm threshold of the second chamber. At this time, the controller notifies the electric valve to operate and close the vent. At this time, the electric valve is in the second state. The electric valve includes a magnetic wrench and a concealed screw. The magnetic wrench is fixedly connected to the insulator body, and the magnetic wrench and the concealed screw are magnetically connected. The concealed screw is threadedly connected to the insulator body. The controller is connected to and communicates with the magnetic wrench. When the controller controls the magnetic field inside the magnetic wrench to rotate clockwise, the rotating magnetic field causes the concealed screw to rotate clockwise and screw into the insulator body. The concealed screw approaches and covers the vent hole, thus sealing the vent hole. When the controller controls the magnetic field inside the magnetic wrench to rotate counterclockwise, the rotating magnetic field causes the concealed screw to rotate counterclockwise and screw out of the insulator body. The concealed screw opens and moves away from the vent hole. This allows the vent hole to be open; the concealed screw includes a screw rod, a nut, and a first set of magnets. The screw rod is fixedly connected to the nut and threadedly connected to the insulator body. The first set of magnets is fixedly connected to the nut, and the nut can be closed onto or separated from the vent hole; the magnetic wrench includes a motor and a second set of magnets. The motor is fixedly connected to the insulator body, and the second set of magnets is fixedly connected to the motor's shaft. The controller is connected to and communicates with the motor. The axis of the motor's shaft is parallel to the axis of the nut, and the rotation axis of the first set of magnets is parallel to the rotation axis of the second set of magnets. The first set of magnets and the second set of magnets are magnetically connected. It also includes a sealing gasket, which is sleeved with the concealed screw and is located between the concealed screw and the vent hole. The concealed screw is covered by the sealing gasket on the vent hole. The controller's control terminal is electrically connected to the motor's control terminal, and the screw and nut are fixedly connected together to form a T-shaped structure.

2. An insulator according to claim 1, characterized in that: The controller is a microcontroller. The first barometer is electrically connected to the controller, and the second barometer is also electrically connected to the controller.

3. A gas-insulated, fully enclosed combined electrical appliance, characterized in that: Based on an insulator as described in claim 1 or 2, a gas-insulated fully enclosed combined electrical appliance is formed.

4. An application, characterized in that: An insulator according to claim 1 or 2 includes supplying air to a chamber with lower air pressure through a chamber with higher air pressure on the insulator side, in order to increase the air pressure of the chamber with lower air pressure on the insulator side.

Images