Transformer pressure relief valve verification device and verification method

Abstract

The invention relates to the technical field of transformer pressure relief valve safety detection, in particular to a transformer pressure relief valve verification device and method. The device comprises a pressurization module which is connected with a transformer pressure relief valve through a pipeline and is used for filling gas into the transformer pressure relief valve, an adjusting module which is connected with the pressurization module through a control wire and is used for controlling and adjusting starting, stopping and operating parameters of the pressurization module, and a detection module which is connected with the pressurization module through a control wire and is used for detecting the starting, stopping and operating parameters of the pressurization module. The detection module is connected to the air pressure sensor and detects the air pressure. The pressurization module is used for directly filling gas into the pressure relief valve, online verification can be achieved, the valve does not need to be disassembled, time and manpower needed by verification are greatly reduced, and efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer pressure relief valve safety detection, and in particular to a transformer pressure relief valve calibration device and calibration method. Background Art

[0002] When a fault occurs inside the transformer oil tank, the transformer oil is decomposed and vaporized, producing a large amount of gas, and the pressure in the tank rises sharply. If this pressure cannot be released in time, the transformer oil tank will be deformed or even burst, causing the accident to expand. If a pressure relief valve is installed, when the tank pressure rises to the opening pressure value of the pressure relief valve, the pressure relief valve will open quickly, causing the pressure in the tank to drop quickly. After the pressure drops, the pressure relief valve will automatically close to keep the tank sealed and avoid further expansion of the accident.

[0003] If the pressure relief valve malfunctions or refuses to operate, the accident will further expand. Therefore, it is necessary to calibrate the pressure relief valve in use. The current calibration method is to remove the pressure relief valve from the main transformer and calibrate it using a special calibration device. The disassembly, installation and calibration process is time-consuming and labor-intensive. Summary of the invention

[0004] In order to improve the efficiency of safety detection of transformer pressure relief valve and simplify the detection method, the present invention provides a transformer pressure relief valve calibration device and calibration method.

[0005] In one aspect, the present invention provides a transformer pressure relief valve calibration device that adopts the following technical solution:

[0006] A transformer pressure relief valve calibration device, comprising:

[0007] A pressurizing module, which is connected to the transformer pressure relief valve through a pipeline and is used to inject gas into the transformer pressure relief valve;

[0008] A regulating module, which is connected to the pressurizing module via a control wire and is used to control the start and stop and operating parameters of the pressurizing module;

[0009] A detection module is connected to the top and detects air pressure.

[0010] By using the pressurization module to directly inject gas into the pressure relief valve, online calibration can be achieved without removing the valve, which greatly reduces the time and manpower required for calibration and improves efficiency. The adjustment module allows precise control of the start and stop and operating parameters of the pressurization module to ensure the accuracy of the calibration process. This precise control can simulate different pressure environments to comprehensively test the performance of the pressure relief valve. The detection module can monitor the air pressure and airflow parameters in real time and provide instant feedback. This real-time monitoring capability helps to quickly identify and solve problems and ensure the reliability of the calibration results. The monitoring data of the detection module can be used for recording and analysis.

[0011] Furthermore, the pressurizing module includes an air pump, and the air pump is connected to the transformer pressure release valve through an air pipe, and the air pipe is a hose.

[0012] The use of hoses makes the connection more flexible and can adapt to different transformer pressure relief valve locations and calibration site environments. This flexibility helps to operate in small or complex spaces.

[0013] Furthermore, one end of the air flow channel of the air pump is an air outlet, and the other end is an air inlet. An air pump interface is provided at one end of the air outlet of the air pump, and a filter is installed at one end of the air inlet of the air pump. A male connector is provided at one end of the air guide tube, and a female connector is provided at the other end. The air guide tube is connected to the deflation wire of the transformer pressure release valve lifting seat through the male connector, and the air guide tube is connected to the air pump interface on the air pump through the female connector.

[0014] A filter is installed at the air inlet of the air pump, which can effectively filter out moisture, dust and other impurities in the air, ensuring that the airflow entering the system is clean, thereby reducing wear and pollution to the equipment. A male connector is set at one end of the air guide tube and a female connector is set at the other end. This standardized interface design makes the installation and disassembly of the device faster and more convenient, reducing operation time and complexity. The design of the male and female connectors can provide good sealing performance, prevent gas leakage during pressurization, and improve the accuracy and safety of the calibration process.

[0015] Furthermore, the regulating module includes an air pressure regulator and a time regulator, wherein the air pressure regulator is used to control the output air pressure of the regulating and pressurizing module, and the time regulator is used to control the operating time of the regulating and pressurizing module.

[0016] The gas pressure regulator can accurately control the output gas pressure of the pressurization module to ensure that stable and appropriate pressure can be provided during the calibration process, thereby improving the accuracy and consistency of the calibration results. The gas pressure regulator can avoid excessive or low pressure, reduce equipment damage and operating risks, and ensure the safety of operators and equipment. The use of the time regulator simplifies the operation process, reduces the need for manual intervention, improves the degree of automation of the calibration process, and reduces the possibility of human error.

[0017] Furthermore, the air pressure regulator includes an adjusting knob, which is used to manually rotate and control the adjustment of the output air pressure of the pressurizing module. The time regulator includes a timing knob and a switch button. The timing knob is used to manually rotate and control the adjustment of the operating time of the pressurizing module, and the switch button is used to manually press and control the start and stop of the pressurizing module.

[0018] By manually rotating the adjustment knob, the user can easily set the required output air pressure. The design of the timing knob allows the user to set the required operating time with a simple rotation. The operation is easy and intuitive. The user can stop the operation at any time through the switch button to prevent equipment damage or safety hazards caused by emergencies. This design improves the safety of operation.

[0019] Furthermore, the detection module includes an air pressure sensor, which is installed in the pressurizing module and monitors the outlet air pressure of the pressurizing module. The air pressure sensor is connected to a data receiver via a data wire, and the air pressure sensor is connected to a data storage device via the data receiver and sends data to the data storage device.

[0020] The air pressure sensors are installed in the pressurization module and the transformer pressure relief valve respectively, and can monitor the air pressure conditions at the two places in real time. This real-time monitoring capability ensures that the operator can obtain the current air pressure status in time, which is convenient for rapid response and adjustment. Through the precise measurement of the air pressure sensor, high-precision air pressure data can be collected. This data provides a reliable basis for the subsequent analysis and evaluation of the verification results, and improves the accuracy and scientificity of the verification. The air pressure sensor is connected to the data receiver through a data wire, and then to the data storage device, so that all collected data can be centrally stored and managed. By transferring the data to the data storage device, all air pressure change data can be recorded and saved, which provides a basis for long-term performance evaluation and equipment health monitoring.

[0021] Furthermore, the detection module is connected to a display module via a data wire, and the display module is used to display the air pressure data detected by the detection module in real time. The display module includes a display screen and a pendulum display. The display screen uses a liquid crystal screen to display the air pressure data value, and the pendulum display uses a pendulum and a scale disk to display the air pressure data value.

[0022] The display screen can display air pressure data in digital form, providing clear and intuitive numerical readings. Users can quickly and accurately read the current air pressure status and reduce the possibility of misreading. Through the combination of the pendulum needle and the scale disk, a traditional analog display method is provided. This display method is a purely physical display with high sensitivity and is not prone to errors. It can be used as an auxiliary reference for the display screen, which is beneficial to the accuracy of detection.

[0023] Furthermore, the detection module is connected to a protection module via a data wire, the protection module is connected to a pressurizing module and an adjustment module via a control wire, the protection module includes an automatic shutdown protector, an alarm and a protective shell, the automatic shutdown protector is connected to the pressurizing module via a control wire and controls the pressurizing module to automatically shut down according to the data detected by the detection module, the alarm includes a flash light and a buzzer, and the alarm displays an alarm according to the data control detected by the detection module.

[0024] By connecting the pressurizing module through the control wire, the shutdown of the pressurizing module can be automatically controlled according to the real-time data provided by the detection module. This automatic shutdown protection function can quickly stop the pressurization process when abnormal air pressure is detected to prevent equipment damage and potential safety hazards. The alarm is equipped with a flash light and a buzzer, which can send out an audible and visual alarm when abnormal air pressure is detected. The combination of sound and light signals provides a clear warning effect to ensure that operators can promptly notice abnormal equipment status.

[0025] Furthermore, the pressurizing module, regulating module and detecting module are respectively connected to a power supply module via power transmission wires, the power supply module includes a battery pack, and the battery pack is connected to an external charging power source via a power port.

[0026] Powered by a battery pack, the device can still operate independently without an external power supply. This independence improves the flexibility of the device and is suitable for a variety of different field environments, especially outdoors or in locations with unstable power supply. Connecting an external charging power source through the power port ensures that the battery pack can be charged in time, extending the continuous working time of the device.

[0027] Another aspect of the present invention provides a transformer pressure relief valve calibration method using the following technical solution:

[0028] A transformer pressure relief valve calibration method includes the following detection steps:

[0029] Shut down the main transformer and cut off the power supply;

[0030] Close the butterfly valve under the transformer pressure relief valve lifting seat;

[0031] Remove the bleed wire from the bleed plug hole on the lower lifting seat of the pressure relief valve, and then connect the pressurization module to the bleed plug hole through a pipe and connect it to the inside of the transformer pressure relief valve;

[0032] The air supply pressure of the pressurizing module is set by controlling the regulating module and then the pressurizing module is started to inflate the inside of the transformer pressure relief valve;

[0033] The detection module is used to detect the pressure increase change of the pressurized module and the internal pressure of the transformer pressure relief valve in real time, and the pressure data change and duration are recorded and stored;

[0034] If the detection module detects that the difference between the operating pressure of the transformer pressure relief valve and the standard opening pressure is too large or too small, the detection fails. Otherwise, if the difference between the operating pressure and the standard opening pressure is within a predetermined range, the detection passes.

[0035] Eliminating the steps of disassembly and reinstallation makes the operation process more simplified and intuitive, allowing operators to complete calibration tasks more quickly without disassembling components, reducing potential safety risks to equipment or personnel during operation, and eliminating the need to disassemble the transformer pressure relief valve, which means that the transformer can be restored to operation in a shorter time when performing calibration. This greatly reduces downtime and improves the availability and overall efficiency of power equipment.

[0036] In summary, the present invention has the following beneficial technical effects:

[0037] 1. By using the pressurizing module to directly inject gas into the pressure relief valve, online calibration can be achieved without disassembling the valve, which greatly reduces the time and manpower required for calibration and improves efficiency. The regulating module allows precise control of the start and stop and operating parameters of the pressurizing module to ensure the accuracy of the calibration process. This precise control can simulate different pressure environments to comprehensively test the performance of the pressure relief valve. The detection module can monitor the air pressure and airflow parameters in real time and provide instant feedback. This real-time monitoring capability helps to quickly identify and solve problems and ensure the reliability of the calibration results. The monitoring data of the detection module can be used for recording and analysis.

[0038] 2. Eliminating the steps of disassembly and reinstallation makes the operation process more simplified and intuitive. Operators can complete the calibration task more quickly without disassembling parts, reducing the potential safety risks to equipment or personnel during operation. There is no need to disassemble the transformer pressure relief valve, which means that the transformer can be restored to operation in a shorter time when the calibration is carried out. This greatly reduces downtime and improves the availability and overall efficiency of power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0040] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0041] Description of reference numerals:

[0042] 1. Pressurization module, 11. Air pump, 111. Air pump interface, 112. Filter, 12. Air duct, 121. Male connector, 122. Female connector, 2. Adjustment module, 21. Air pressure regulator, 211. Adjustment knob, 22. Time regulator, 221. Timing knob, 222. Switch button, 3. Detection module, 31. Air pressure sensor, 32. Data receiver, 33. Data storage device, 4. Display module, 41. Display screen, 42. Pendulum display, 5. Protection module, 51. Automatic shutdown protector, 52. Alarm, 53. Protection shell, 6. Power supply module, 61. Battery pack, 62. Electrical connection port. DETAILED DESCRIPTION

[0043] The following will be combined with the attached Figure 1-Figure 2 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] Embodiment 1:

[0046] The embodiment of the present invention discloses a transformer pressure relief valve calibration device, referring to Figure 1 and Figure 2 ,include:

[0047] A pressurizing module 1, which is connected to the transformer pressure relief valve through a pipeline and is used to inject gas into the transformer pressure relief valve;

[0048] A regulating module 2, wherein the regulating module 2 is connected to the pressurizing module 1 via a control wire and is used to control the start and stop and operating parameters of the pressurizing module 1;

[0049] The detection module 3 is connected to the above and detects air pressure and airflow parameters.

[0050] When the main transformer is shut down for maintenance, there is no need to disassemble the pressure relief valve for calibration, and there is no need to install the pressure relief valve after the calibration is completed. This solves the problem of time-consuming and labor-intensive calibration of existing pressure relief valves in use. Pressurization and depressurization are directly performed on the transformer to measure the opening and closing pressure values, and the opening and closing pressures meet the regulations.

[0051] Embodiment 2:

[0052] On the basis of Example 1, add:

[0053] Reference Figure 1 and Figure 2 The pressurizing module 1 includes an air pump 11, and the air pump 11 is connected to the transformer pressure release valve through an air pipe 12, and the air pipe 12 is a hose.

[0054] Reference Figure 1 and Figure 2 One end of the air flow channel of the air pump 11 is an air outlet, and the other end is an air inlet. An air pump interface 111 is provided at one end of the air outlet of the air pump 11, and a filter 112 is installed at one end of the air inlet of the air pump 11;

[0055] The air duct 12 is provided with a connecting male connector 121 at one end and a connecting female connector 122 at the other end. The air duct 12 is connected to the deflation wire of the transformer pressure release valve lifting seat through the connecting male connector 121, and the air duct 12 is connected to the air pump interface 111 on the air pump 11 through the connecting female connector 122.

[0056] The bleed wire is a threaded bolt with a hollow center. The hollow channel is connected in the vertical direction of the screw to form an "L"-shaped hollow channel connecting the inside and the outside.

[0057] The structure of the transformer pressure relief valve under test is, from bottom to top, an oil tank, a butterfly valve switch, a lifting seat and a pressure relief valve, and the bleed wire is installed on the lifting seat.

[0058] When the transformer is running, the butterfly valve is in the open state, that is, the transformer oil is filled in the riser, which is equivalent to the pressure relief valve being a switch. When the internal pressure reaches a certain level, the pressure relief valve opens and the transformer oil is discharged. There is a special pipe for discharge, and the pipe extends close to the ground so that the discharged oil will not spray randomly. At the same time, the pressure drops. When it drops to the closing pressure, the pressure relief valve closes.

[0059] Reference Figure 1 and Figure 2 The regulating module 2 includes a pressure regulator 21 and a time regulator 22 . The pressure regulator 21 is used to control the output pressure of the regulating pressurizing module 1 , and the time regulator 22 is used to control the running time of the regulating pressurizing module 1 .

[0060] Reference Figure 1 and Figure 2 The air pressure regulator 21 includes an adjusting knob 211, and the adjusting knob 211 is used for manually rotating to control and adjust the output air pressure of the pressurizing module 1;

[0061] The time regulator 22 includes a timing knob 221 and a switch button 222 . The timing knob 221 is used to manually rotate to control and adjust the operating time of the pressurizing module 1 , and the switch button 222 is used to manually press to control the start and stop of the pressurizing module 1 .

[0062] Reference Figure 1 and Figure 2 The detection module 3 includes an air pressure sensor 31, which is installed in the pressurizing module 1 and monitors the outlet air pressure of the pressurizing module 1. The air pressure sensor 31 is connected to a data receiver 32 through a data wire. The air pressure sensor 31 is connected to a data storage device 33 through the data receiver 32 and sends data to the data storage device 33.

[0063] Normally, the main pressure relief valve is configured as follows:

[0064] Voltage level Opening pressure quantity 110kV 55kPa 1 220kV 55kPa 2 330kV and above 70kPa 2

[0065] The opening pressure of 110kV and 220kV switch pressure relief valve is 85kPa.

[0066] The opening pressure should comply with the following table:

[0067]

[0068]

[0069] Embodiment 3:

[0070] On the basis of Example 2, add:

[0071] Reference Figure 1 and Figure 2 The detection module 3 is connected to the display module 4 via a data wire, and the display module 4 is used to display the air pressure data detected by the detection module 3 in real time;

[0072] The display module 4 includes a display screen 41 and a pendulum display 42. The display screen 41 displays the air pressure data value using a liquid crystal screen, and the pendulum display 42 displays the air pressure data value using a pendulum and a scale disk.

[0073] Reference Figure 1 and Figure 2, the detection module 3 is connected to the protection module 5 through a data wire, and the protection module 5 is connected to the pressurizing module 1 and the regulating module 2 through a control wire;

[0074] The protection module 5 includes an automatic shutdown protector 51, an alarm 52 and a protection shell 53. The automatic shutdown protector 51 is connected to the pressurizing module 1 through a control wire and controls the pressurizing module 1 to automatically shut down according to the data detected by the detection module 3. The alarm 52 includes a flash light and a buzzer. The alarm 52 controls the alarm display according to the data detected by the detection module 3.

[0075] Reference Figure 1 and Figure 2 The pressurizing module 1 , the regulating module 2 and the detecting module 3 are respectively connected to the power supply module 6 via power transmission wires. The power supply module 6 includes a battery pack 61 . The battery pack 61 is connected to an external charging power source via a power port 62 .

[0076] Embodiment 4:

[0077] The embodiment of the present invention discloses a transformer pressure relief valve calibration method, referring to Figure 1 and Figure 2 , and in combination with Example 1 to Example 3, the following detection steps are included:

[0078] Shut down the main transformer and cut off the power supply;

[0079] Close the butterfly valve under the transformer pressure relief valve lifting seat;

[0080] Remove the bleed wire from the bleed plug hole on the lower lifting seat of the pressure relief valve, and then connect the pressurizing module 1 to the bleed plug hole through a pipeline and connect it to the inside of the transformer pressure relief valve;

[0081] The regulating module 2 controls and sets the air supply pressure of the pressurizing module 1, and then starts the pressurizing module 1 to inflate the inside of the transformer pressure relief valve;

[0082] The detection module 3 is used to detect the pressure increase change of the air supply of the pressurizing module 1 and the internal air pressure of the transformer pressure relief valve in real time, and the pressure data change and duration are recorded and stored;

[0083] If the detection module 3 detects that the difference between the operating pressure of the transformer pressure relief valve and the standard opening pressure is too large or too small, the detection fails; otherwise, if the difference between the operating pressure and the standard opening pressure is within a predetermined range, the detection passes.

[0084] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A transformer pressure relief valve calibration device, characterized in that: include: A pressurizing module (1), the pressurizing module (1) being connected to the transformer pressure relief valve via a pipeline and used for injecting gas into the transformer pressure relief valve; A regulating module (2), the regulating module (2) being connected to the pressurizing module (1) via a control wire and being used to control the start and stop and operating parameters of the pressurizing module (1); A detection module (3) is connected to the sensor and detects air pressure parameters.

2. A transformer pressure relief valve calibration device according to claim 1, characterized in that: The pressurizing module (1) comprises an air pump (11), the air pump (11) being connected to a transformer pressure release valve via an air pipe (12), and the air pipe (12) being a hose.

3. A transformer pressure relief valve calibration device according to claim 2, characterized in that: One end of the air flow channel of the air pump (11) is an air outlet, and the other end is an air inlet. An air pump interface (111) is provided at one end of the air outlet of the air pump (11), and a filter (112) is installed at one end of the air inlet of the air pump (11); One end of the air guide tube (12) is provided with a connecting male head (121), and the other end is provided with a connecting female head (122); the air guide tube (12) is connected to the deflation wire of the transformer pressure release valve lifting seat via the connecting male head (121); and the air guide tube (12) is connected to the air pump interface (111) on the air pump (11) via the connecting female head (122).

4. A transformer pressure relief valve calibration device according to claim 1, characterized in that: The regulating module (2) comprises an air pressure regulator (21) and a time regulator (22), wherein the air pressure regulator (21) is used to control the output air pressure of the regulating and pressurizing module (1), and the time regulator (22) is used to control the operating time of the regulating and pressurizing module (1).

5. A transformer pressure relief valve calibration device according to claim 4, characterized in that: The air pressure regulator (21) comprises an adjusting knob (211), and the adjusting knob (211) is used to manually rotate to control and adjust the output air pressure of the pressurizing module (1); The time regulator (22) comprises a timing knob (221) and a switch button (222); the timing knob (221) is used for manually rotating to control and adjust the operating time of the pressurizing module (1); and the switch button (222) is used for manually pressing to control the start and stop of the pressurizing module (1).

6. A transformer pressure relief valve calibration device according to claim 1, characterized in that: The detection module (3) comprises an air pressure sensor (31), which is installed in the pressurizing module (1) and monitors the outlet air pressure of the pressurizing module (1). The air pressure sensor (31) is connected to a data receiver (32) via a data wire. The air pressure sensor (31) is connected to a data storage device (33) via the data receiver (32) and sends data to the data storage device (33).

7. A transformer pressure relief valve calibration device according to claim 6, characterized in that: The detection module (3) is connected to a display module (4) via a data wire, and the display module (4) is used to display the air pressure data detected by the detection module (3) in real time; The display module (4) comprises a display screen (41) and a pendulum display (42); the display screen (41) uses a liquid crystal screen to display the numerical value of air pressure data; and the pendulum display (42) uses a pendulum and a scale disk to display the numerical value of air pressure data.

8. A transformer pressure relief valve calibration device according to claim 6, characterized in that: The detection module (3) is connected to the protection module (5) via a data wire, and the protection module (5) is connected to the pressurizing module (1) and the regulating module (2) via a control wire; The protection module (5) comprises an automatic shutdown protector (51), an alarm (52) and a protection housing (53); the automatic shutdown protector (51) is connected to the pressurizing module (1) via a control wire and controls the pressurizing module (1) to automatically shut down according to data detected by the detection module (3); the alarm (52) comprises a flash light and a buzzer; the alarm (52) controls an alarm display according to the data detected by the detection module (3).

9. A transformer pressure relief valve calibration device according to claim 1, characterized in that: The pressurizing module (1), the regulating module (2) and the detecting module (3) are respectively connected to a power supply module (6) via power transmission wires; the power supply module (6) comprises a battery pack (61); and the battery pack (61) is connected to an external charging power source via a power connection port (62).

10. A transformer pressure relief valve calibration method, characterized in that: The transformer pressure relief valve verification device according to any one of claims 1 to 9 comprises the following detection steps: Shut down the main transformer and cut off the power supply; Close the butterfly valve under the transformer pressure relief valve lifting seat; Remove the bleed wire from the bleed plug hole on the lower lifting seat of the pressure relief valve, and then connect the pressurizing module (1) to the bleed plug hole through a pipeline and connect it to the inside of the transformer pressure relief valve; The air supply pressure of the pressurizing module (1) is set by controlling the regulating module (2), and then the pressurizing module (1) is started to inflate air into the transformer pressure relief valve; Using the detection module (3) to detect the pressure increase change of the air supply of the pressurizing module (1) and the air pressure inside the transformer pressure relief valve in real time, and recording and storing the air pressure data change and duration; If the detection module (3) detects that the difference between the operating pressure of the transformer pressure relief valve and the standard opening pressure is too large or too small, the detection fails; otherwise, if the difference between the operating pressure and the standard opening pressure is within a predetermined range, the detection passes.

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