Automatic pressure regulating and monitoring device for air pressure sealing test of transformer

Abstract

The utility model discloses an automatic pressure regulating and monitoring device for a transformer air pressure sealing test, which relates to the technical field of transformer sealing detection and comprises a first pressure transmitter, a second pressure transmitter, a first pressure sensor, a second pressure sensor and a second pressure sensor, and the first pressure transmitter is arranged on the outer side of the bottom of a transformer body oil tank and connected with the transformer body oil tank through an oil injection valve; the second pressure transmitter is arranged at the upper end of the transformer body oil tank and connected with the transformer body oil tank; the pressure relief valve is arranged at the upper end of the transformer body oil tank and used for releasing pressure of the transformer body oil tank; the air pressure adjusting device is connected with the body oil conservator and the switch oil conservator through a respirator interface; the output end of the first pressure transmitter and the output end of the second pressure transmitter are connected with the air pressure adjusting device. An oil guide pipe is arranged between the first pressure transmitter and the second pressure transmitter. According to the utility model, the automatic pressure regulation monitoring technology is adopted, so that the accurate control of the pressure sealing test process of the transformer is realized, and the test precision and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer sealing detection, in particular to an automatic voltage regulating monitoring device for transformer air pressure sealing test. Background Art

[0002] With the development of the electric power industry, power transformers, as key equipment in the power system, are receiving increasing attention for their operational stability and safety. Among them, the sealing performance of the transformer is one of the important factors to ensure its normal operation. In order to ensure that the transformer can maintain good sealing performance under various working environments, the transformer needs to be tested for sealing after installation. However, there are some problems with the traditional transformer air pressure sealing test, such as cumbersome manual voltage adjustment operations and difficulty in monitoring the test process, which may affect the accuracy and efficiency of the test.

[0003] In order to solve these problems, researchers began to explore the automated voltage regulation monitoring technology for transformer gas pressure sealing tests. Some early automated voltage regulation monitoring devices mainly relied on mechanical and electrical control technologies. Although they improved the automation of the test to a certain extent, they still had problems such as low voltage regulation accuracy and imperfect monitoring functions. In addition, with the rapid development of artificial intelligence and computer technology, these technologies have also been introduced into the automated voltage regulation monitoring of transformer gas pressure sealing tests, which has further improved the performance of the voltage regulation monitoring device.

[0004] At present, there are some transformer gas pressure seal test devices on the market, which usually have functions such as automatic inflation, real-time monitoring, and data recording. However, due to differences between different manufacturers and technologies, these devices still have certain problems. For example, during the transformer seal test, changes in ambient temperature will cause the volume of the insulating oil to expand or contract accordingly, which may cause the internal pressure of the oil tank to exceed the design mechanical strength limit, or be lower than the standard value.

[0005] Therefore, it is still of great significance to develop an automatic voltage regulation monitoring device for transformer air pressure sealing test with stable performance and complete functions. Utility Model Content

[0006] The technical problem to be solved by the utility model is to solve the deficiencies in the prior art and to design an automatic voltage regulation and monitoring device for transformer air pressure sealing test. The device adopts advanced control algorithms and sensor technology, can realize accurate automatic voltage regulation and real-time monitoring, and also has data recording and analysis functions. By using the device, the accuracy and efficiency of the transformer air pressure sealing test can be improved, providing strong support for ensuring the stable operation of the power system.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] An automatic voltage regulation monitoring device for transformer gas pressure sealing test, comprising:

[0009] The first pressure transmitter is arranged at the outer side of the bottom of the transformer body oil tank and connected to the transformer body oil tank through an oil filling valve;

[0010] The second pressure transmitter is arranged at the upper end of the transformer body oil tank and connected to the transformer body oil tank;

[0011] A pressure relief valve is provided at the upper end of the transformer body oil tank and is used to release the pressure of the transformer body oil tank;

[0012] The air pressure regulating device is connected to the main body oil conservator and the switch oil conservator through the respirator interface;

[0013] The output ends of the first pressure transmitter and the second pressure transmitter are connected to the air pressure regulating device; and an oil guide pipe is arranged between the first pressure transmitter and the second pressure transmitter.

[0014] As a further technical solution of the utility model, the air pressure regulating device comprises:

[0015] An inflation module, used for providing gas to be inflated and regulating the gas to be inflated;

[0016] A wireless receiver, used to receive pressure information from a wireless pressure transmitter and transmit the pressure information to a control module via an RS485 bus;

[0017] A control module controls the inflation module according to the pressure information and controls the display output;

[0018] Display module, used for interacting with users;

[0019] Operation button, used to start and shut down the inflation module;

[0020] The output end of the control module is connected to the inflation module, the operation button and the input end of the wireless receiver are connected to the control module, and the output end of the control module is connected to the display module.

[0021] As a further technical solution of the utility model, the inflation module comprises:

[0022] Gas cylinders, used to store gas to be filled;

[0023] An inflation valve, arranged on the inflation pipeline, is used to control the inflation of gas from the gas cylinder to the respirator interface;

[0024] A pressure reducing valve is used to adjust the air pressure in the inflation pipe;

[0025] Electronic pressure gauge, used to detect the inflation pressure of the inflation pipe;

[0026] Electronic exhaust valve, used to discharge the gas from the inflation pipe;

[0027] The output end of the gas cylinder is connected to the inflation pipeline, on which a first gas valve, a pressure reducing valve, an inflation valve and an electronic pressure gauge are arranged, a second gas valve is arranged between the electronic pressure gauge and the inflation pipeline, and the inflation pipeline is also connected to an electronic exhaust valve.

[0028] As a further technical solution of the utility model, the control module adopts Mitsubishi's FX3U-16MR PLC controller.

[0029] As a further technical solution of the present utility model, the first pressure transmitter and the second pressure transmitter are Lora pressure transmitters.

[0030] As a further technical solution of the present utility model, the wireless receiver is a Lora receiver.

[0031] As a further technical solution of the utility model, the second pressure transmitter is arranged on the transformer body oil tank through an adsorption magnet.

[0032] As a further technical solution of the present utility model, the second pressure transmitter and the pressure relief valve are at the same horizontal position.

[0033] Compared with the prior art, the utility model has the following beneficial effects:

[0034] 1. The utility model realizes that the transformer of the tested equipment maintains a relatively stable pressure, places the sealing surface to be tested under the applied air pressure, finds the leakage point, and achieves the ideal effect of the sealing test, solving the problem that the sealing effect is greatly affected by pressure and the leakage situation is difficult to observe under the existing technology.

[0035] 1. Improve the accuracy and efficiency of the test: This device can automatically adjust the air pressure, avoiding the tedious manual pressure adjustment operation and errors, and improving the accuracy and efficiency of the test. At the same time, the real-time monitoring function makes the test process more controllable, and abnormal situations can be discovered and handled in time, further improving the stability of the test.

[0036] 2. Reduce labor costs and labor intensity: The traditional transformer air pressure sealing test requires manual voltage adjustment and monitoring, which is cumbersome, time-consuming and labor-intensive; while this device realizes automatic voltage adjustment and monitoring, reduces labor costs and reduces the labor intensity of staff.

[0037] 3. Enhanced data recording and analysis capabilities: This device has data recording and analysis functions, which can record the pressure data during the test in real time for staff to view and analyze; this has important guiding significance for optimizing the test plan and improving the test effect.

[0038] 4. Improve equipment safety and reliability: This device ensures the safety and reliability of the equipment during the test process through precise automatic voltage regulation and real-time monitoring; at the same time, the application of 4G networking module enables the equipment to report alarm information in time under abnormal circumstances, further improving the safety and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a structural diagram of an automatic voltage regulating monitoring device for transformer gas pressure sealing test proposed by the utility model;

[0040] Figure 2 This is a control structure diagram of an automatic voltage regulating monitoring device for transformer gas pressure sealing test proposed by the utility model;

[0041] Figure 3 This is an electrical control diagram of an automatic voltage regulating monitoring device for transformer gas pressure sealing test proposed by the utility model;

[0042] Figure 4 This is a circuit diagram of the control module proposed by the utility model.

[0043] As shown in the figure:

[0044] 1-first pressure transmitter, 2-second pressure transmitter, 3-pressure release valve, 4-air pressure regulating device, 5-oil guide pipe;

[0045] 10-transformer body oil tank, 20-body oil conservator, 30-switch oil conservator;

[0046] 101- oil filling valve, 401- inflation module, 402- wireless receiver, 403- control module, 404- display module, 405- operation button;

[0047] 411 - gas cylinder, 412 - charging valve, 413 - pressure reducing valve, 414 - electronic pressure gauge, 415 - electronic exhaust valve, 416 - charging pipe, 417 - first gas valve, 418 - second gas valve. DETAILED DESCRIPTION

[0048] The following describes the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments:

[0049] It should be noted that the structures, colors, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0050] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0051] like Figure 1 As shown, the utility model provides an automatic voltage regulation monitoring device for transformer gas pressure sealing test, comprising:

[0052] The first pressure transmitter 1 is arranged at the outer side of the bottom of the transformer body oil tank 10 and connected to the transformer body oil tank 10 through the oil filling valve 101;

[0053] The second pressure transmitter 2 is arranged at the upper end of the transformer body oil tank 10 and connected to the transformer body oil tank 10;

[0054] The pressure relief valve 3 is arranged at the upper end of the transformer body oil tank 10 and is used to release the pressure of the transformer body oil tank 10;

[0055] The air pressure regulating device 4 is connected to the main body oil storage cabinet 20 and the switch oil storage cabinet 30 through the respirator interface;

[0056] The output ends of the first pressure transmitter 1 and the second pressure transmitter 2 are connected to the air pressure regulating device 4 ; an oil guide pipe 5 is arranged between the first pressure transmitter 1 and the second pressure transmitter 2 .

[0057] In the embodiment of the utility model, the maximum oil pressure and the minimum oil pressure in the transformer body oil tank are monitored by the first pressure transmitter and the second pressure transmitter arranged on the transformer body oil tank, and the monitoring results are sent to the air pressure regulating device to adjust the oil pressure in the transformer body oil tank. The first pressure transmitter and the second pressure transmitter are connected by an oil guide pipe. The first pressure transmitter is arranged at the bottom of the transformer body oil tank to monitor the maximum pressure value of the transformer body oil tank. The second pressure transmitter is arranged at the upper end of the transformer body oil tank mainly to detect the oil pressure at the position of the pressure relief valve so that the experiment cannot exceed the action value. When detecting the pressure relief valve, the function is to open and release the oil pressure when the pressure is too high, and restore the pressure relief valve when the pressure is normal.

[0058] See also Figure 2 In the embodiment of the utility model, the air pressure regulating device 4 includes:

[0059] An inflation module 401 is used to provide gas to be inflated and to regulate the gas to be inflated;

[0060] A wireless receiver 402 is used to receive pressure information from a wireless pressure transmitter and transmit the pressure information to a control module via an RS485 bus;

[0061] The control module 403 controls the inflation module according to the pressure information and controls the display output;

[0062] Display module 404, used for interacting with the user;

[0063] Operation button 405, used to start and stop the inflation module;

[0064] The output end of the control module is connected to the inflation module, the operation button and the input end of the wireless receiver are connected to the control module, and the output end of the control module is connected to the display module.

[0065] See also Figure 1 , the inflation module 401 comprises:

[0066] Gas cylinder 411, used for storing gas to be filled;

[0067] An inflation valve 412, provided on the inflation pipeline, is used to control the inflation of gas from the gas cylinder to the breathing apparatus interface;

[0068] A pressure reducing valve 413, used to adjust the air pressure of the inflation pipe;

[0069] An electronic pressure gauge 414, used for detecting the inflation pressure of the inflation pipe;

[0070] An electronic exhaust valve 415 is used to discharge the gas in the inflation pipe;

[0071] The output end of the gas cylinder 411 is connected to the inflation pipe 416, on which a first gas valve 417, a pressure reducing valve 413, an inflation valve 412 and an electronic pressure gauge 414 are arranged, a second gas valve 418 is arranged between the electronic pressure gauge 414 and the inflation pipe 416, and the inflation pipe 416 is also connected to an electronic exhaust valve 415.

[0072] In the embodiment of the utility model, high-purity nitrogen is filled in the gas cylinder, which is used to inflate the capsules in the main body oil conservator and the switch oil conservator. The first gas valve is opened, and the gas passes through the inflation pipe, the pressure reducing valve and the inflation valve into the first inflation pipe and the second inflation pipe connected to the respirator interface. The first inflation pipe is connected to the capsule inside the main body oil conservator to inflate the capsule. The insulating oil inside the main body oil conservator is inflated into the inside of the transformer main body oil tank under the pressure of the capsule. The second inflation pipe inflates the inside of the switch oil conservator to ensure that the on-load tap changer is within the normal pressure difference range and will not be damaged due to excessive pressure difference.

[0073] When the main body oil conservator and the switch oil conservator are inflated, the second valve and the third valve on the first oil pipeline between the main body oil conservator and the transformer main body oil tank are opened, and the insulating oil of the main body oil conservator is filled into the transformer main body oil tank to realize the oil delivery operation to the transformer main body oil tank, the fifth valve and the sixth valve on the second oil pipeline between the switch oil conservator and the on-load tap changer are opened, and the switch oil conservator is filled with oil into the on-load tap changer to keep the pressure difference of the on-load tap changer within the set range, the first pressure transmitter and the second pressure transmitter send the pressure information of the transformer main body oil tank to the air pressure regulating device, and the air pressure regulating device judges the pressure information to judge the air pressure sealing of the transformer.

[0074] At the same time, the control module displays the pressure information through the display module, and the inflation volume can also be set and controlled through manual operation buttons.

[0075] In the embodiment of the utility model, the control module adopts the PLC controller of Mitsubishi FX3U-16MR.

[0076] The first pressure transmitter and the second pressure transmitter are Lora pressure transmitters. The wireless receiver is a Lora receiver. The Lora wireless pressure transmitter is powered by a lithium battery. The air pressure regulating device is powered by AC220V.

[0077] The utility model adopts the air pressure method to conduct a sealing test on transformers installed on site. The gas cylinder contains dry air or nitrogen. The charging module applies a static pressure of 30Kpa to the oil surface on the top of the main body oil storage cabinet for a sealing test. The control module exhausts the air by controlling the electronic exhaust valve to achieve a pressure relief effect. The Lora receiver is used to receive the pressure information of the Lora wireless pressure transmitter and transmit the pressure information to the PLC through the RS485 bus. The control module also adds an RS485 module, which is an expansion module of the PLC, so that the PLC can add a set of RS485 communications. The display screen uses a configuration screen for interaction with the user, such as inputting a set air pressure and displaying the current wireless pressure sensor pressure value. The configuration screen has a data recording function, which can store the pressure data of the test process in the database for staff to view.

[0078] In the embodiment of the utility model, the second pressure transmitter is arranged on the transformer body oil tank through an adsorption magnet; the second pressure transmitter and the pressure release valve are at the same horizontal position.

[0079] The specific operation process of the embodiment of the utility model is that the user installs the air pressure regulating device, the first pressure transmitter and the second pressure transmitter on the transformer body oil tank, and uses the laid AC220V power supply to power the air pressure regulating device. During the test, the third valve and the fourth valve between the main body oil storage cabinet and the transformer body oil tank are opened; a gas relay is also arranged between the third valve and the fourth valve. After the test monitoring is completed, the fifth valve and the sixth valve are opened, the air pressure regulating device is removed, and the respirator interface is connected to the respirator to complete the air pressure sealing test.

[0080] The specific experimental operation method is as follows:

[0081] When starting the test, the user needs to bring the air pressure regulating device, the first pressure transmitter, the second pressure transmitter, and lay out the AC220V power supply for the air pressure regulating device;

[0082] Install the first pressure transmitter at the bottom of the V1 oil tank (oil filling valve), open the bottom of the V11 oil tank (oil filling valve) and discharge the gas inside the pipeline at the same time, and ensure that the pressure value can be read normally by transmitting the pressure inside the transformer;

[0083] Install the second pressure transmitter on the top of the transformer by using an adsorption magnet so that it is at the same level as the pressure relief valve. At the same time, discharge the gas inside the pipeline and transmit the pressure inside the transformer through the oil guide pipe to confirm that the pressure value is read normally.

[0084] Connect the air inlet pipe of the air pressure regulating device to the respirator interface of the oil conservator, open the valves V12, V13, V21, and V22, and close the valves V14 and V23 of the oil conservator;

[0085] Open the V31 and V32 air valves, adjust the pressure reducing valve to 40kpa, then start the air pressure regulating device, and check whether the configuration screen correctly receives the pressure data sent back by the first pressure transmitter and the second pressure transmitter;

[0086] According to the requirements of DL-T 264, set the air pressure to 30kPa through the configuration screen and maintain it for 24 hours;

[0087] Before the pressure sealing test is started, the control module ensures that the maximum pressure on the transformer body tank does not exceed the limit of its positive pressure mechanical strength, and at the same time ensures that the pressure of the pressure relief valve is lower than its starting pressure. The calculation process will be based on the real-time pressure data measured by the first pressure transmitter, and the gas pressure will be increased by 30kPa on this basis. For transformers with a voltage level of ≤500kV, this increase shall not exceed 100kPa; when the voltage level is 750kV, it shall not exceed 110kPa; when the voltage level is 1000kV, it shall not exceed 120kPa to ensure that the transformer tank will not be damaged or permanently deformed. At the same time, we will also consider the actual pressure value measured by the second pressure transmitter, and after adding 30kPa pressure, ensure that it is lower than the starting pressure of the pressure relief valve device to ensure that the transformer will not be activated due to excessive pressure.

[0088] Start the electronic inflation valve to start inflation, and observe the pressure of the first pressure transmitter and the second pressure transmitter gradually increase. At this time, the electronic exhaust valve controlled by the PLC is completely closed;

[0089] When the PLC detects that the oil pressure reaches the set value (measured pressure plus 30kPa) through the second pressure transmitter, the electronic charging valve is stopped to automatically close the air supply, and the pressure of the second pressure transmitter is monitored in real time to maintain the oil pressure of the transformer;

[0090] When the ambient temperature changes or other factors cause the transformer air pressure to drop, the PLC system will automatically open the inflation valve to inflate to adjust the air pressure to the preset value, ensuring that the air pressure is not less than 90% of the set value. Conversely, if the transformer air pressure rises due to ambient temperature changes or other reasons, the PLC system will control the opening of the electronic exhaust valve to discharge the excess air pressure into the atmosphere, thereby restoring the air pressure to the preset value;

[0091] When the test time is reached or needs to be terminated early, the system sends a work end signal. At this time, the electronic exhaust valve will automatically open to exhaust. Then, the operator closes the V11 oil filling valve at the bottom of the transformer, removes the pipes related to the pressure regulating device and pressure detection, and installs the transformer respirator. At this point, the test is officially over.

[0092] By using Lora Wireless Pressure Transmitter 1 and Lora Wireless Pressure Transmitter 2, the oil pressure inside the transformer is monitored in real time to ensure the accuracy of the test data. This technical point is highly innovative and practical, and helps to improve test efficiency.

[0093] The pressure is precisely controlled through the PLC system to achieve automatic adjustment of the air pressure. According to the requirements of "DL-T264", the pressure is set and maintained for 24 hours to ensure the smooth progress of the test. This technical point has a high level of intelligence and helps to reduce the difficulty of operation.

[0094] During the test, the PLC system monitors the air pressure in real time and automatically initiates corresponding safety measures when the air pressure exceeds the preset value. For example, the electronic exhaust valve is opened to discharge excess air pressure to ensure that the transformer tank will not be damaged or permanently deformed. This technical point has high safety and helps prevent accidents that may occur during the test.

[0095] The device parameters are set and controlled through the configuration screen and physical buttons. The configuration screen is used to set parameters and start automatic control, and the physical buttons are used for manual control and emergency stop. This design is highly user-friendly and helps operators use and debug the device more easily.

[0096] See also Figure 3 and Figure 4 The utility model uses Mitsubishi FX3U-16MR PLC and Weiluntong 7-inch screen, and adopts AC220V and DC24V power supply. Through the output IO Y1, Y2, Y3 of the PLC, the relay and buzzer are driven to realize the control of the electronic exhaust valve, electronic charging valve and alarm prompt. This design has high stability and reliability, which helps to ensure the normal operation of the equipment.

[0097] The equipment is powered by AC220V 50Hz power supply, and the electronic inflation valve and PLC power supply are AC220V. The electronic exhaust valve and configuration screen are powered by DC24V, respectively powered by two AC220V to DC24V switching power supplies. The equipment interaction includes the configuration screen and physical buttons. The configuration screen is used to set parameters and start automatic control. The physical buttons are used to manually control the debugging equipment and stop the equipment in an emergency. The manual buttons include manual valve closing, manual valve opening, manual inflation, and manual inflation stop. The output IO Y1 of the PLC drives the relay KA1 to directly control the opening and closing of the electronic exhaust valve. Y2 drives KA3 to control the buzzer to prompt the alarm information. Y3 controls the relay KA4 to control the opening and closing of the electronic inflation valve.

[0098] The utility model of the automatic voltage regulation monitoring device for transformer gas pressure sealing test realizes accurate automatic voltage regulation and real-time monitoring by adopting sensor technology, and also has data recording and analysis functions. Compared with the traditional manual voltage regulation and monitoring methods, this device has the following significant beneficial effects:

[0099] 1. Improve the accuracy and efficiency of the test: This device can automatically adjust the air pressure, avoiding the tedious manual pressure adjustment operation and errors, and improving the accuracy and efficiency of the test. At the same time, the real-time monitoring function makes the test process more controllable, and abnormal situations can be discovered and handled in time, further improving the stability of the test.

[0100] 2. Reduce labor costs and labor intensity: Traditional transformer gas pressure sealing tests require manual voltage regulation and monitoring, which is cumbersome, time-consuming and labor-intensive. This device realizes automatic voltage regulation and monitoring, reduces labor costs and reduces the labor intensity of staff.

[0101] 3. Enhanced data recording and analysis capabilities: This device has data recording and analysis functions, which can record the pressure data during the test in real time for staff to view and analyze. This has important guiding significance for optimizing the test plan and improving the test effect.

[0102] 4. Improve equipment safety and reliability: This device ensures the safety and reliability of the equipment during the test through precise automatic voltage regulation and real-time monitoring. At the same time, the application of 4G networking module enables the equipment to report alarm information in time under abnormal conditions, further improving the safety and reliability of the equipment.

[0103] In summary, the utility model of the automatic voltage regulation monitoring device for transformer gas pressure sealing test has significant beneficial effects, which can not only improve the accuracy and efficiency of the test, reduce labor costs and labor intensity, but also enhance data recording and analysis capabilities, and improve the safety and reliability of the equipment. This is of great significance for ensuring the stable operation of the power system.

[0104] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic voltage regulation monitoring device for transformer gas pressure sealing test, characterized in that: include: The first pressure transmitter is arranged at the outer side of the bottom of the transformer body oil tank and connected to the transformer body oil tank through an oil filling valve; The second pressure transmitter is arranged at the upper end of the transformer body oil tank and connected to the transformer body oil tank; A pressure relief valve is provided at the upper end of the transformer body oil tank and is used to release the pressure of the transformer body oil tank; The air pressure regulating device is connected to the main body oil conservator and the switch oil conservator through the respirator interface; The output ends of the first pressure transmitter and the second pressure transmitter are connected to the air pressure regulating device; and an oil guide pipe is arranged between the first pressure transmitter and the second pressure transmitter.

2. The automatic voltage regulation monitoring device for transformer gas pressure sealing test according to claim 1 is characterized in that: The air pressure regulating device comprises: An inflation module, used for providing gas to be inflated and regulating the gas to be inflated; A wireless receiver, used to receive pressure information from a wireless pressure transmitter and transmit the pressure information to a control module via an RS485 bus; A control module controls the inflation module according to the pressure information and controls the display output; Display module, used for interacting with users; Operation button, used to start and shut down the inflation module; The output end of the control module is connected to the inflation module, the operation button and the input end of the wireless receiver are connected to the control module, and the output end of the control module is connected to the display module.

3. The automatic voltage regulation monitoring device for transformer gas pressure sealing test according to claim 2 is characterized in that: The inflation module comprises: Gas cylinders, used to store gas to be filled; An inflation valve, arranged on the inflation pipeline, is used to control the inflation of gas from the gas cylinder to the respirator interface; A pressure reducing valve is used to adjust the air pressure in the inflation pipe; Electronic pressure gauge, used to detect the inflation pressure of the inflation pipe; Electronic exhaust valve, used to discharge the gas from the inflation pipe; The output end of the gas cylinder is connected to the inflation pipeline, on which a first gas valve, a pressure reducing valve, an inflation valve and an electronic pressure gauge are arranged, a second gas valve is arranged between the electronic pressure gauge and the inflation pipeline, and the inflation pipeline is also connected to an electronic exhaust valve.

4. The automatic voltage regulation monitoring device for transformer gas pressure sealing test according to claim 2 is characterized in that: The control module adopts Mitsubishi's FX3U-16MR PLC controller.

5. The automatic voltage regulation monitoring device for transformer gas pressure sealing test according to claim 1 is characterized in that: The first pressure transmitter and the second pressure transmitter are Lora pressure transmitters.

6. The automatic voltage regulation monitoring device for transformer gas pressure sealing test according to claim 2 is characterized in that: The wireless receiver is a Lora receiver.

7. The automatic voltage regulation monitoring device for transformer gas pressure sealing test according to claim 1 is characterized in that: The second pressure transmitter is arranged on the transformer body oil tank through an adsorption magnet.

8. The automatic voltage regulation monitoring device for transformer gas pressure sealing test according to claim 1 is characterized in that: The second pressure transmitter and the pressure relief valve are at the same horizontal position.

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