Gas low-voltage monitoring device for high-voltage circuit breaker

Abstract

The invention discloses a gas low-voltage monitoring device for a high-voltage circuit breaker, which comprises a shell, a gas storage tank and a regulation and control chamber, and is characterized in that the shell is provided with an arc extinguish chamber; the gas storage tank is connected with a gas supplementing pipe; the regulation and control chamber is connected with the shell, a side channel communicated with the arc extinguish chamber, a pressure measuring chamber communicated with the side channel and a pressure measuring magnet slidably connected with an inner cavity of the pressure measuring chamber are arranged in the regulation and control chamber, and the output end of the air supply pipe is connected with the side channel. A blocking plug is arranged at the joint of an inner cavity of the side channel and the air supplementing pipe in a sliding mode, and a regulating and controlling magnet repelling the pressure measuring magnet in magnetism is fixed to the side wall of the blocking plug. According to the invention, the air pressure of the arc extinguish chamber can be monitored, and after the air pressure of the arc extinguish chamber is reduced, the high-pressure gas pre-stored in the gas storage tank is automatically controlled to be supplemented into the arc extinguish chamber, so that the purpose of automatically regulating and controlling the air pressure is realized, the air pressure in the arc extinguish chamber is always kept normal, and the reliable performance of the high-voltage circuit breaker is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage circuit breakers, and in particular to a gas low-pressure monitoring device for a high-voltage circuit breaker. Background Art

[0002] High-voltage circuit breakers are divided into compressed air type, self-energy type and hybrid type according to different breaking principles, but all of them have an arc extinguishing chamber. Its function is to rely on the movement of the moving contact to compress the sulfur hexafluoride gas in the inner cavity of the gas chamber to provide high-speed and high-pressure airflow to extinguish the arc when breaking. It is necessary to keep a certain pressure of the sulfur hexafluoride gas in the arc extinguishing chamber to ensure its arc extinguishing effect.

[0003] In the prior art, a Chinese patent with publication number CN107146737B discloses an arc extinguishing chamber moving contact, an arc extinguishing chamber and a high-voltage circuit breaker, wherein the arc extinguishing chamber includes a moving contact and a conductive seat that is guided and moved with the moving contact, the moving contact and the conductive seat together form an air chamber, and an annular mounting groove is provided on the mating surface of the moving contact that slides with the conductive seat, a sealing ring is installed in the annular mounting groove, and a compressed air channel connecting the annular mounting groove and the air chamber is further provided on the moving contact, the compressed air channel is connected with the annular mounting groove through the bottom of the annular mounting groove and causes the gas in the air chamber to pressurize the sealing ring radially outward when the moving contact is opened; the arc extinguishing chamber is filled with high-pressure gas for improving the arc extinguishing effect, and the gas will gradually be consumed during multiple opening and closing operations, and the reduction in gas pressure will affect the arc extinguishing effect of the high-voltage circuit breaker at the time of opening, and the traditional air pressure detection method is usually to install a pressure gauge for detection, which requires manual regular inspection, which easily leads to the inability to replenish the air pressure when the air pressure is reduced. Summary of the Invention

[0004] Based on this, it is necessary to provide a high-voltage circuit breaker gas low-pressure monitoring device to address the above technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A high-voltage circuit breaker gas low-pressure monitoring device, comprising: A housing, wherein an arc extinguishing chamber is provided on the housing, and a static contact and a moving contact are provided in the arc extinguishing chamber; An air storage tank, wherein the air storage tank is connected to an air supply pipe; A control chamber, the control chamber is connected to the shell, and is respectively provided with a side channel connected to the arc extinguishing chamber, a pressure measuring chamber connected to the side channel, and a pressure measuring magnet slidingly connected to the inner cavity of the pressure measuring chamber. The output end of the air supply pipe is connected to the side channel, and a plug is slidingly provided at the connection between the inner cavity of the side channel and the air supply pipe. The side wall of the plug is fixed with a control magnet that magnetically repels the pressure measuring magnet. The control magnet is placed on the side of the pressure measuring chamber away from the arc extinguishing chamber, and the control magnet is slidably arranged with the control chamber along the axis of the side channel. A reset spring is installed on the side of the control magnet away from the pressure measuring chamber.

[0006] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, an indicator rod is inserted into the control chamber at a position corresponding to the pressure measuring chamber, and an indicator magnet is installed at one end of the indicator rod close to the pressure measuring chamber. The indicator magnet and the pressure measuring magnet magnetically repel each other. When the inner cavity of the arc extinguishing chamber is at normal air pressure, the pressure measuring magnet is pushed upward by the high-pressure gas. Since the indicator magnet and the pressure measuring magnet repel each other, the indicator magnet is pushed upward by the magnetic force generated by the pressure measuring magnet and synchronously drives the indicator rod upward; conversely, when the inner cavity of the arc extinguishing chamber is in a low-pressure state, the pressure measuring magnet is reduced by the gas thrust, and the pressure measuring magnet moves downward and away from the indicator magnet. At this time, the indicator magnet will move downward and drive the indicator rod to move downward synchronously. The maintenance personnel can intuitively understand the air pressure state in the arc extinguishing chamber by observing the elongation of the indicator rod, which is convenient for the maintenance personnel to perform maintenance and improves the convenience of maintenance.

[0007] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, the upper part of the indicator rod extends to the outside of the control chamber, and the lower part of the indicator rod is coated with a warning coating. When the air pressure in the arc extinguishing chamber is normal, the warning coating on the indicator rod will be exposed. Conversely, when the air pressure in the arc extinguishing chamber is lower than the normal value, the indicator rod moves downward, and the warning coating will be blocked by the control chamber. At this time, the maintenance personnel can intuitively understand the air pressure status in the arc extinguishing chamber by observing the position of the coating on the indicator rod, and judge whether the air pressure is in a qualified state, which is convenient for timely maintenance.

[0008] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, an air pressure sensor is installed in the side channel, and an electromagnet is installed on the side of the regulating magnet away from the pressure measuring chamber.

[0009] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, a gas intelligent controller is installed on the shell, and an air pressure analysis module and an air pressure control module are provided on the gas intelligent controller. The air pressure analysis module is respectively connected to the air pressure sensor and the air pressure control module signal, and the air pressure control module is connected to the electromagnet signal. The air pressure sensor can detect the air pressure state in the side channel, that is, the air pressure state in the arc extinguishing chamber. The air pressure sensor sends the detected air pressure value to the air pressure analysis module. The air pressure analysis module compares the air pressure value with a preset air pressure threshold (the air pressure analysis module is preset with a normal air pressure value in the arc extinguishing chamber). When the air pressure analysis module analyzes that the air pressure value is always lower than the preset air pressure threshold in the preset time period (S-.S), the air pressure analysis module determines that the pressure is lower than the preset pressure threshold. When the air pressure in the arc extinguishing chamber is in an abnormal gas replenishment state, the air pressure analysis module sends a main control signal to the air pressure control module. The air pressure control module controls the operation of the electromagnet. The operation of the electromagnet generates magnetism that attracts the control magnet. As shown in the figure, the control magnet is controlled to drive the stopper to move, and the gas supply pipe is connected to the channel of the side channel. The high-pressure gas pre-stored in the gas tank is actively controlled to enter the side channel, so that the air pressure in the arc extinguishing chamber returns to normal. At this time, the air pressure analysis module judges that the air pressure in the arc extinguishing chamber has returned to the preset air pressure threshold through the pressure value feedback from the air pressure sensor. The air pressure analysis module sends a reset signal to the air pressure control module, and the air pressure control module controls the electromagnet to stop working. At this time, the reset spring pushes the control magnet and the stopper to reset, so that the arc extinguishing chamber and the side channel form a stable closed environment, so that it maintains a stable air pressure environment.

[0010] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, each of the arc extinguishing chambers on the shell is correspondingly connected to a side channel, each of the side channels is correspondingly connected to an air supply pipe, each of the air supply pipes is installed with a sub-control solenoid valve, and a proximity switch corresponding to the block is installed at the end of the side channel away from the arc extinguishing chamber. Multiple air supply pipes are connected in series through a main pipe, and the main pipe is connected to a gas storage tank. The gas storage tank supplies gas to multiple air supply pipes through the main pipe and adjusts the gas pressure of multiple arc extinguishing chambers. Each air supply pipe controls its connectivity through a corresponding sub-control solenoid valve.

[0011] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, the air pressure analysis module is connected to the proximity switch signal, and the air pressure control module is connected to the sub-control solenoid valve signal. When the air pressure in the corresponding arc extinguishing chamber is greatly reduced, the stopper is displaced and contacts the proximity switch through the action of the provided pressure measuring magnet and the control magnet. The proximity switch sends the position information to the air pressure analysis module. The air pressure analysis module determines that the air pressure at the corresponding arc extinguishing chamber is greatly reduced and the pressure compensation intensity needs to be increased. At this time, the air pressure analysis module sends a reinforcement signal to the air pressure control module. The air pressure control module controls the sub-control solenoid valve on the corresponding arc extinguishing chamber to open, and at the same time controls the sub-control solenoid valves corresponding to other arc extinguishing chambers to close, so that the gas in the gas storage tank independently supplies gas to the arc extinguishing chamber at this time, so that the corresponding arc extinguishing chamber quickly returns to a normal air pressure level. When it is detected that the air pressure in the corresponding arc extinguishing chamber has returned to a normal level, multiple sub-control solenoid valves are controlled to open. When the pressure of multiple arc extinguishing chambers is adjusted, the pressure of the arc extinguishing chamber with lower air pressure can be adjusted separately to make it recover quickly, thereby improving the performance stability of the high-voltage circuit breaker.

[0012] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, the main pipe is connected to the upper end of the gas storage tank, the upper end of the gas storage tank is connected to a gas filling pipe, the gas filling pipe is installed with a gas supply solenoid valve, the inner cavity of the main pipe is slidably connected to a pressure regulating plate, the bottom of the main pipe is open, and the top surface of the pressure regulating plate is connected to the top of the inner cavity of the main pipe by an elastic band. In order to ensure that the gas tank can provide sufficient gas pressure to the arc extinguishing chamber, when the high-pressure gas enters the gas supply pipe through the main pipe, the elastic band will drive the pressure regulating plate to gradually move upward and compress the space above the inner cavity of the gas tank, so that the gas in the gas tank is always in a high-pressure state, which can improve the utilization rate of the gas.

[0013] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, a distance sensor corresponding to the bottom of the gas storage tank is installed on the bottom surface of the voltage regulating plate, and a proximity switch 2 corresponding to the voltage regulating plate is installed on the upper part of the inner cavity of the gas storage tank.

[0014] As a preferred embodiment of the high-voltage circuit breaker gas low-pressure monitoring device provided by the present invention, the gas intelligent controller is further provided with a residual monitoring module, which is respectively connected to the gas pressure control module, the distance sensor and the proximity switch. The distance sensor detects the distance between the pressure regulating plate and the bottom of the gas tank, and can calculate the gas residual amount at different positions of the pressure regulating plate in the gas tank through the bottom area data of the gas tank, so as to timely understand the residual amount of gas in the gas tank and replenish it in time through the gas filling pipe. The distance sensor sends the detected distance data to the residual monitoring module in real time, and the residual monitoring module calculates the residual amount in the gas tank through the distance data, and performs gas residual monitoring. Monitoring can also be carried out by sending monitoring data through wireless transmission to the receiving terminal of the maintenance personnel, such as mobile phones, tablets and other devices, so that the maintenance personnel can monitor in time. When the pressure regulating plate is in contact with the two-phase proximity switch, the pressure regulating plate sends a position signal to the residual monitoring module. The residual monitoring module determines that the gas content in the gas tank is at a low threshold. The residual monitoring module sends an audible and visual reminder to remind the operator to replenish it in time. At the same time, the residual monitoring module sends an insufficient residual signal to the air pressure control module. The air pressure control module controls each sub-control solenoid valve to close, which can improve the airtightness of each arc extinguishing chamber and reduce the impact on the air pressure of the arc extinguishing chamber when replenishing the gas tank, so that the air pressure of the arc extinguishing chamber is always kept stable.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the pressure in the arc extinguishing chamber is reduced, the pressure in the inner cavity of the side channel will be reduced synchronously. At this time, the pressure measuring magnet will move toward one side of the side channel. During this process, the pressure measuring magnet will gradually approach the regulating magnet. Since the pressure measuring magnet and the regulating magnet repel each other, the regulating magnet will drive the stopper to move toward the side away from the arc extinguishing chamber. At this time, the connection between the gas supply pipe and the side channel is unblocked, and the high-pressure gas in the gas tank will enter the arc extinguishing chamber, so that the air pressure in the arc extinguishing chamber is restored to normal. The air pressure in the side channel increases and pushes the pressure measuring magnet to move up and reset. After the pressure measuring magnet moves away from the regulating magnet, the reset spring pushes the regulating magnet to reset, and synchronously drives the stopper to block the air supply pipe, so as to monitor the air pressure in the arc extinguishing chamber, and after the air pressure in the arc extinguishing chamber is reduced, the high-pressure gas pre-stored in the gas tank is automatically controlled to be replenished into the arc extinguishing chamber, so as to achieve the purpose of automatic air pressure regulation, so that the air pressure in the arc extinguishing chamber is always maintained at a normal air pressure, thereby ensuring the reliable performance of the high-voltage circuit breaker.

[0016] 2. The present invention provides a high-voltage circuit breaker gas low-pressure monitoring device. By setting a gas intelligent controller, the air pressure analysis module compares the air pressure value with a preset air pressure threshold. When the air pressure analysis module analyzes that the air pressure value is always lower than the preset air pressure threshold during the preset time period, the air pressure analysis module determines that the air pressure in the corresponding arc extinguishing chamber is in an abnormal gas replenishment state. The air pressure control module controls the operation of the electromagnet, connects the gas replenishment pipe with the channel of the side channel, and actively controls the high-pressure gas pre-stored in the gas storage tank to enter the side channel, so that the air pressure in the arc extinguishing chamber returns to normal, so that it maintains a stable air pressure environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the overall structure provided by the present invention; Figure 2 A schematic diagram of the positions of the housing and gas storage tank provided by the present invention; Figure 3 A schematic cross-sectional view of the arc extinguishing chamber and the control chamber provided by the present invention; Figure 4 A schematic cross-sectional view of the control chamber provided by the present invention; Figure 5 This is a block diagram of the control principle of the gas intelligent controller provided by the present invention; Figure 6 A schematic diagram of the movement of the pressure measuring magnet and the blocking plug when the gas pressure in the arc extinguishing chamber decreases provided by the present invention; Figure 7 This is a schematic diagram of the movement of the blocking plug during electromagnetic operation provided by the present invention.

[0019] The markings in the figure are as follows: 1. Housing; 2. Gas intelligent controller; 3. Control chamber; 4. Indicator rod; 5. Arc extinguishing chamber; 6. Static contact; 7. Moving contact; 8. Side channel; 9. Gas supply pipe; 10. Stopper; 11. Pressure measuring chamber; 12. Pressure measuring magnet; 13. Control magnet; 14. Air pressure sensor; 15. Indicator magnet; 16. Electromagnet; 17. Proximity switch 1; 18. Main pipe; 19. Gas storage tank; 20. Pressure regulating plate; 21. Gas filling pipe; 22. Gas supply solenoid valve; 23. Proximity switch 2; 24. Distance sensor; 25. Sub-control solenoid valve. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0021] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other unless there is any conflict.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. Example

[0023] Please refer to Figure 1-Figure 4 A high-voltage circuit breaker gas low-pressure monitoring device includes a shell 1, a gas storage tank 19 and a control chamber 3. The shell 1 is provided with an arc extinguishing chamber 5, and the arc extinguishing chamber 5 is provided with a static contact 6 and a moving contact 7. The gas storage tank 19 is connected to a gas supply pipe 9. The inner cavity of the gas storage tank 19 is filled with storage gas for replenishing the gas in the arc extinguishing chamber 5. When the gas pressure in the arc extinguishing chamber 5 is lower than the normal value, the gas in the inner cavity of the arc extinguishing chamber 5 is replenished through the gas supply pipe 9 to restore the normal gas pressure.

[0024] It is worth mentioning that Figure 3 、 Figure 4 and Figure 6As shown, the control chamber 3 is connected to the housing 1, and the control chamber 3 is respectively provided with a side channel 8 connected to the arc extinguishing chamber 5, a pressure measuring chamber 11 connected to the side channel 8, and a pressure measuring magnet 12 slidably connected to the inner cavity of the pressure measuring chamber 11. The inner cavities of the arc extinguishing chamber 5, the side channel 8 and the pressure measuring chamber 11 are connected, and the air pressure changes of the three are the same. When the air pressure in the arc extinguishing chamber 5 is at a qualified level, the high-pressure gas pushes the pressure measuring magnet 12 to move to the upper end of the inner cavity of the pressure measuring chamber 11. On the contrary, when the air pressure in the arc extinguishing chamber 5 is at a low pressure state, the air pressure driving force on the pressure measuring magnet 12 is reduced, and the pressure measuring magnet 12 will move toward the side channel 8 one side is displaced, the output end of the air supply pipe 9 is connected to the side channel 8, and a stopper 10 is slidingly provided at the connection between the inner cavity of the side channel 8 and the air supply pipe 9. In the initial state, the stopper 10 will block the connection between the air supply pipe 9 and the side channel 8. By controlling the displacement of the stopper 10, the blockage of the air supply pipe 9 is released, so that the high-pressure gas in the air supply pipe 9 enters the side channel 8 to supplement the high-pressure gas in the arc extinguishing chamber 5. The side wall of the stopper 10 is fixed with a regulating magnet 13 that repel the pressure measuring magnet 12 magnetically. The regulating magnet 13 is placed on the side of the pressure measuring chamber 11 away from the arc extinguishing chamber 5. The regulating magnet 13 moves along the side channel The axis of channel 8 is slidingly arranged with the control chamber 3, and a reset spring is installed on the side of the control magnet 13 away from the pressure measuring chamber 11. When the air pressure in the arc extinguishing chamber 5 decreases, the air pressure in the inner cavity of the side channel 8 will decrease synchronously. At this time, the pressure measuring magnet 12 will move toward the side of the side channel 8. During this process, the pressure measuring magnet 12 will gradually approach the control magnet 13. Since the pressure measuring magnet 12 and the control magnet 13 repel each other, the control magnet 13 will drive the stopper 10 to move toward the side away from the arc extinguishing chamber 5. At this time, the connection between the gas supply pipe 9 and the side channel 8 is unblocked, and the high-pressure gas in the gas tank 19 will enter the arc extinguishing chamber 5. In the process, the air pressure in the arc extinguishing chamber 5 returns to normal, the air pressure in the side channel 8 increases and pushes the pressure measuring magnet 12 to move up and reset. After the pressure measuring magnet 12 moves away from the regulating magnet 13, the regulating magnet 13 is pushed to reset by the reset spring, and the blocking plug 10 is simultaneously driven to seal the air supply pipe 9, which can monitor the air pressure in the arc extinguishing chamber 5, and after the air pressure in the arc extinguishing chamber 5 is reduced, the high-pressure gas pre-stored in the gas tank 19 is automatically controlled to be replenished into the arc extinguishing chamber 5, so as to achieve the purpose of automatic air pressure regulation, so that the air pressure in the arc extinguishing chamber 5 always maintains a normal air pressure, thereby ensuring the reliable performance of the high-voltage circuit breaker.

[0025] In this example, see Figure 1 and Figure 2, an indicator rod 4 is plugged into the control chamber 3 at the position corresponding to the pressure measuring chamber 11, and an indicator magnet 15 is installed on the end of the indicator rod 4 close to the pressure measuring chamber 11. The indicator magnet 15 and the pressure measuring magnet 12 magnetically repel each other. When the inner cavity of the arc extinguishing chamber 5 is at normal air pressure, the pressure measuring magnet 12 is pushed up by the high-pressure gas. Since the indicator magnet 15 and the pressure measuring magnet 12 repel each other, the indicator magnet 15 is pushed up by the magnetic force generated by the pressure measuring magnet 12 and synchronously drives the indicator rod 4 to move up; conversely, when the inner cavity of the arc extinguishing chamber 5 is at low pressure, the pressure measuring magnet 12 is reduced by the gas thrust, and the pressure measuring magnet 12 moves downward and away from the indicator magnet 15. At this time, the indicator magnet 15 will move downward and drive the indicator rod 4 to move downward synchronously. By observing the extension of the indicator rod 4, the maintenance personnel can intuitively understand the air pressure status in the arc extinguishing chamber 5, which is convenient for the maintenance personnel to carry out maintenance and improves the convenience of maintenance. The upper part of the indicator rod 4 extends to the outside of the control chamber 3, and the lower part of the indicator rod 4 is coated with a warning coating. By coating the warning coating on the indicator rod 4, when the air pressure in the arc extinguishing chamber 5 is normal, the warning coating on the indicator rod 4 will be exposed. On the contrary, when the air pressure in the arc extinguishing chamber 5 is lower than the normal value, the indicator rod 4 moves downward, and the warning coating will be blocked by the control chamber 3. At this time, the maintenance personnel can intuitively understand the air pressure status in the arc extinguishing chamber 5 by observing the coating position on the indicator rod 4, and judge whether the air pressure is in a qualified state, which is convenient for timely maintenance.

[0026] It is worth mentioning that see Figure 5 and Figure 7 , an air pressure sensor 14 is installed in the side channel 8, an electromagnet 16 is installed on the side of the regulating magnet 13 away from the pressure measuring chamber 11, a gas intelligent controller 2 is installed on the housing 1, and an air pressure analysis module and an air pressure control module are provided on the gas intelligent controller 2. The air pressure analysis module is respectively connected to the air pressure sensor 14 and the air pressure control module signal, and the air pressure control module is connected to the electromagnet 16 signal. The air pressure state in the side channel 8, that is, the air pressure state in the arc extinguishing chamber 5, can be detected by the air pressure sensor 14. The air pressure sensor 14 sends the detected air pressure value to the The air pressure analysis module compares the air pressure value with the preset air pressure threshold (the air pressure analysis module is preset with the normal air pressure value in the arc extinguishing chamber 5). When the air pressure analysis module analyzes that the air pressure value is always lower than the preset air pressure threshold in the preset time period (1S-1.5S), the air pressure analysis module determines that the air pressure in the corresponding arc extinguishing chamber 5 is in an abnormal gas replenishment state. At this time, the air pressure analysis module sends a main control signal to the air pressure control module, and the air pressure control module controls the electromagnet 16 to work. The electromagnet 16 generates magnetic attraction with the control magnet 13, such as Figure 7As shown, the control magnet 13 is controlled to drive the stopper 10 to move, connecting the air supply pipe 9 with the channel of the side channel 8, and actively controlling the high-pressure gas stored in the gas tank 19 to enter the side channel 8, so that the air pressure in the arc extinguishing chamber 5 returns to normal. At this time, the air pressure analysis module judges that the air pressure in the arc extinguishing chamber 5 has returned to the preset air pressure threshold through the pressure value feedback from the air pressure sensor 14. The air pressure analysis module sends a reset signal to the air pressure control module, and the air pressure control module controls the electromagnet 16 to stop working. At this time, the reset spring pushes the control magnet 13 and the stopper 10 to reset, so that the arc extinguishing chamber 5 and the side channel 8 form a stable closed environment, so that it maintains a stable air pressure environment. Example

[0027] The high-voltage circuit breaker gas low-pressure monitoring device provided in the first embodiment is further optimized. The difference from the first embodiment is that, please refer to Figure 4 and Figure 5 Each arc extinguishing chamber 5 on the housing 1 is connected to a side channel 8, and each side channel 8 is connected to an air supply pipe 9. Each air supply pipe 9 is equipped with a separate control solenoid valve 25. A proximity switch 17 corresponding to the stopper 10 is installed at the end of the side channel 8 away from the arc extinguishing chamber 5. By setting a proximity switch 17 on each side channel 8, the corresponding position of the stopper 10 in each side channel 8 can be detected. When the air pressure in the arc extinguishing chamber 5 drops significantly, the pressure measuring magnet 12 will drop to the lowest point of the pressure measuring chamber 11. At this time, the regulating magnet 13 is repelled by the pressure measuring magnet 12 and moves away from the regulating magnet 13. At this time, the stopper 10 is in contact with the proximity switch 17, which makes it convenient to judge the low-pressure state of the air pressure in the arc extinguishing chamber 5 through the proximity switch 17. Multiple air supply pipes 9 are connected in series through the main pipe 18, and the main pipe 18 is connected to the gas storage tank 19. The gas storage tank 19 supplies air to the multiple air supply pipes 9 through the main pipe 18 and adjusts the air pressure of multiple arc extinguishing chambers 5. Each air supply pipe 9 controls its connectivity through the corresponding sub-control solenoid valve 25.

[0028] It is worth mentioning that the air pressure analysis module is connected to the proximity switch 17 signal, and the air pressure control module is connected to the sub-control solenoid valve 25 signal. When the air pressure in the corresponding arc extinguishing chamber 5 is greatly reduced, the pressure measuring magnet 12 and the control magnet 13 are used to displace the stopper 10 and contact the proximity switch 17. The proximity switch 17 sends the position information to the air pressure analysis module. The air pressure analysis module determines that the air pressure in the corresponding arc extinguishing chamber 5 is greatly reduced and the pressure compensation strength needs to be increased. At this time, the air pressure analysis module sends a reinforcement signal to the air pressure control module. The control module controls the sub-control solenoid valve 25 on the corresponding arc extinguishing chamber 5 to open, and controls the sub-control solenoid valves 25 corresponding to other arc extinguishing chambers 5 to close, so that the gas in the gas tank 19 independently supplies gas to the arc extinguishing chamber 5 at this time, so that the corresponding arc extinguishing chamber 5 quickly recovers to the normal air pressure level, and when it is detected that the air pressure of the corresponding arc extinguishing chamber 5 recovers to the normal level, multiple sub-control solenoid valves 25 are controlled to open. When the pressure of multiple arc extinguishing chambers 5 is adjusted, the pressure of the arc extinguishing chamber 5 with lower pressure can be adjusted separately to make it recover quickly, thereby improving the performance stability of the high-voltage circuit breaker. Example

[0029] The low-pressure gas monitoring device for a high-voltage circuit breaker provided in the second embodiment is further optimized. Unlike the second embodiment, when the gas storage tank 19 provides gas with sufficient pressure for the arc extinguishing chamber 5, the pressure in the gas storage tank 19 will gradually decrease. When the pressure in the gas storage tank 19 decreases, the gas in the gas storage tank 19 cannot enter the arc extinguishing chamber 5 normally, and the pressure in the gas storage tank 19 needs to be replenished in time, which leads to a decrease in the utilization rate of the gas in the gas storage tank 19. In order to solve the above problem, please refer to Figure 2 and Figure 5 The main pipe 18 is connected to the upper end of the gas storage tank 19, and the upper end of the gas storage tank 19 is connected to a gas filling pipe 21. The gas filling pipe 21 is installed with a gas supply solenoid valve 22. The inner cavity of the main pipe 18 is slidably connected with a pressure regulating plate 20. The bottom of the main pipe 18 is open, and the top surface of the pressure regulating plate 20 is connected to the top of the inner cavity of the main pipe 18 by an elastic band. In order to ensure that the gas storage tank 19 can provide sufficient air pressure to the arc extinguishing chamber 5, when the high-pressure gas enters the gas supply pipe 9 through the main pipe 18, the elastic band will drive the pressure regulating plate 20 to gradually move upward and compress the space above the inner cavity of the gas storage tank 19, so that the gas in the gas storage tank 19 is always in a high-pressure state, which can improve the utilization rate of the gas.

[0030] In this embodiment, a distance sensor 24 corresponding to the bottom of the gas tank 19 is installed on the bottom surface of the pressure regulating plate 20, and a proximity switch 23 corresponding to the pressure regulating plate 20 is installed on the upper part of the inner cavity of the gas tank 19. A residual monitoring module is also provided on the gas intelligent controller 2, and the residual monitoring module is respectively connected to the pressure control module, the distance sensor 24 and the proximity switch 23. The distance sensor 24 detects the distance between the pressure regulating plate 20 and the bottom of the gas tank 19, and can calculate the residual amount of gas at different positions of the pressure regulating plate 20 in the gas tank 19 through the bottom area data of the gas tank 19, so as to timely understand the residual amount of gas in the gas tank 19 and replenish it in time through the gas filling pipe 21. The distance sensor 24 sends the detected distance data to the residual monitoring module in real time, and the residual monitoring module uses the distance The data is used to calculate the remaining amount in the gas tank 19 and monitor the gas remaining amount. The monitoring data can also be sent to the receiving terminal of the maintenance personnel through wireless transmission, such as mobile phones, tablets and other devices, so that the maintenance personnel can monitor in time. When the pressure regulating plate 20 is in contact with the proximity switch 23, the pressure regulating plate 20 sends a position signal to the remaining amount monitoring module. The remaining amount monitoring module determines that the gas content in the gas tank 19 is at a low threshold. The remaining amount monitoring module sends an audible and visual reminder to remind the operator to replenish it in time. At the same time, the remaining amount monitoring module sends an insufficient remaining amount signal to the air pressure control module. The air pressure control module controls each sub-control solenoid valve 25 to be closed, which can improve the airtightness of each arc extinguishing chamber 5 and reduce the impact on the air pressure of the arc extinguishing chamber 5 when replenishing the gas in the gas tank 19, so that the air pressure of the arc extinguishing chamber 5 is always kept stable.

[0031] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A high-voltage circuit breaker gas low-pressure monitoring device, characterized in that: include: A housing (1), wherein an arc extinguishing chamber (5) is provided on the housing (1), and a static contact (6) and a moving contact (7) are provided in the arc extinguishing chamber (5); An air storage tank (19), wherein the air storage tank (19) is connected to an air supply pipe (9); A control chamber (3), the control chamber (3) is connected to the housing (1), and the control chamber (3) is respectively provided with a side channel (8) connected to the arc extinguishing chamber (5), a pressure measuring chamber (11) connected to the side channel (8), and a pressure measuring magnet (12) slidably connected to the inner cavity of the pressure measuring chamber (11), the output end of the air supply pipe (9) is connected to the side channel (8), and a stopper (10) is slidably provided at the connection between the inner cavity of the side channel (8) and the air supply pipe (9), and a control magnet (13) that magnetically repels the pressure measuring magnet (12) is fixed to the side wall of the stopper (10), and the control magnet (13) is placed on the side of the pressure measuring chamber (11) away from the arc extinguishing chamber (5), and the control magnet (13) is slidably provided with the control chamber (3) along the axis of the side channel (8), and a reset spring is installed on the side of the control magnet (13) away from the pressure measuring chamber (11).

2. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 1, characterized in that: An indicator rod (4) is inserted into the control chamber (3) at a position corresponding to the pressure measuring chamber (11), and an indicator magnet (15) is installed at one end of the indicator rod (4) close to the pressure measuring chamber (11). The indicator magnet (15) and the pressure measuring magnet (12) magnetically repel each other.

3. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 2, characterized in that: The upper portion of the indicator rod (4) extends to the outside of the control chamber (3), and the lower portion of the indicator rod (4) is coated with a warning coating.

4. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 1, characterized in that: An air pressure sensor (14) is installed in the side channel (8), and an electromagnet (16) is installed on the side of the regulating magnet (13) away from the pressure measuring chamber (11).

5. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 4, characterized in that: A gas intelligent controller (2) is installed on the housing (1), and an air pressure analysis module and an air pressure control module are provided on the gas intelligent controller (2). The air pressure analysis module is respectively connected to the air pressure sensor (14) and the air pressure control module for signal connection, and the air pressure control module is connected to the electromagnet (16) for signal connection.

6. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 5, characterized in that: Each of the arc extinguishing chambers (5) on the housing (1) is correspondingly connected to a side channel (8), each of the side channels (8) is correspondingly connected to an air supply pipe (9), each of the air supply pipes (9) is installed with a sub-control solenoid valve (25), and a proximity switch (17) corresponding to the stopper (10) is installed at one end of the side channel (8) away from the arc extinguishing chamber (5), and multiple air supply pipes (9) are connected in series through a main pipe (18), and the main pipe (18) is connected to the gas storage tank (19).

7. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 6, characterized in that: The air pressure analysis module is connected to the proximity switch 1 (17) signal, and the air pressure control module is connected to the sub-control solenoid valve (25) signal.

8. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 7, characterized in that: The main pipe (18) is connected to the upper end of the gas storage tank (19), the upper end of the gas storage tank (19) is connected to a gas filling pipe (21), and a gas supply solenoid valve (22) is installed on the gas filling pipe (21). The inner cavity of the main pipe (18) is slidably connected to a pressure regulating plate (20), the bottom of the main pipe (18) is open, and the top surface of the pressure regulating plate (20) is connected to the top of the inner cavity of the main pipe (18) through an elastic band.

9. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 8, characterized in that: A distance sensor (24) corresponding to the bottom of the gas storage tank (19) is installed on the bottom surface of the pressure regulating plate (20), and a proximity switch 2 (23) corresponding to the pressure regulating plate (20) is installed on the upper part of the inner cavity of the gas storage tank (19).

10. A high-voltage circuit breaker gas low-pressure monitoring device according to claim 9, characterized in that: The gas intelligent controller (2) is also provided with a residual monitoring module, and the residual monitoring module is respectively connected to the gas pressure control module, the distance sensor (24) and the proximity switch 2 (23) for signal transmission.

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