A transformer fault monitoring device

Abstract

This invention discloses a transformer fault monitoring device, relating to the field of electrical equipment testing technology. It includes a transformer, oil tank, mounting base, multiple ceramic membrane tubes, a fixed tube, a detection base, a partition, and an air bladder; a puncture mechanism for puncturing the air bladder, causing it to shrink in volume; and a detection mechanism for detecting the air bladder's shrinkage. Gas generated in the transformer's internal oil tank enters the ceramic membrane tubes. Through the gas-liquid separation action of the ceramic membrane tubes, the gas passes through the tubes and enters the gas storage chamber. As the gas volume increases, the puncture mechanism punctures the air bladder, causing it to shrink from an expanded state. This triggers the detection mechanism, achieving a monitoring and early warning effect. When the air bladder shrinks, a drive mechanism moves a movable frame, causing a scraper to slide relative to the ceramic membrane tube, cleaning the surface of the tube and preventing low permeability from affecting the gas-liquid separation efficiency.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment testing technology, specifically to a transformer fault monitoring device. Background Technology

[0002] When a circuit fault occurs within a transformer tank, the high-temperature arc generated by the short-circuit current causes the transformer oil to decompose and produce gas. It can also cause burnout or charring of transformer components at the arc point, generating gas in the process. Additionally, leaks in the transformer tank allow air to enter, accumulating at the top. This accumulated gas inevitably reduces the space occupied by the transformer oil, leading to a decrease in oil level. Reduced or deteriorated transformer oil affects its cooling, insulation, arc-suppressing, and liquid-sealing effects. Severe reduction or deterioration of the transformer oil can result in inadequate protection during transformer operation, causing malfunctions. Therefore, a monitoring device capable of promptly detecting transformer faults is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a transformer fault monitoring device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a transformer fault monitoring device, comprising a transformer, wherein an oil conservator is connected to the top of the transformer via an oil pipe, and further comprising:

[0005] Mounting base, the two ends of which are respectively connected to the oil inlet of the oil tank and the oil outlet of the oil pipe. The mounting base has an air storage chamber inside and a through cavity at each of its axial ends. The two through cavities are respectively connected to the oil inlet of the oil tank and the oil outlet of the oil pipe.

[0006] Multiple ceramic membrane tubes are arranged in an array along the axial direction of the mounting base and pass through the mounting base. The two ends of the ceramic membrane tubes pass through the two through cavities respectively, and the middle part is located in the gas storage cavity.

[0007] A fixed tube is fixedly connected to the mounting base, and the interior of the fixed tube communicates with the air storage chamber. A detection seat is connected to the end of the fixed tube away from the mounting base. The detection seat is hollow and fixedly connected to a partition. The partition and the inner top wall of the detection seat form an installation space, and an airbag is placed in the installation space.

[0008] A puncture mechanism is used to puncture the airbag, thereby reducing the volume of the airbag;

[0009] A testing mechanism is used to detect the volume contraction of the airbag.

[0010] Furthermore, the testing institution includes:

[0011] A flange seat is installed in the assembly hole opened on the top of the detection seat, and a recessed mounting hole is opened on one end face of the flange seat facing the airbag.

[0012] A pressure plate is slidably installed in the mounting hole and in contact with the surface of the airbag. A sensing block is provided on the upper surface of the pressure plate.

[0013] An inductive switch is mounted on the flange seat and used in conjunction with the inductive block.

[0014] Furthermore, the piercing mechanism includes:

[0015] A float, which is placed inside the fixed tube and can move freely up and down;

[0016] A lightweight sliding rod, the lower end of which is fixed to the surface of the float, and the upper end of which is inserted into the detection seat and can slide freely up and down;

[0017] The needle is fixed to the upper end of the lightweight sliding rod, and the partition has a first through hole for the needle to pass through freely.

[0018] Furthermore, a light-load spring is wound around the lightweight sliding rod, and the two ends of the light-load spring elastically abut against the float and the detection seat respectively in the direction of the spring force. A limit ring is sleeved on the upper end of the lightweight sliding rod, and the lower end face of the limit ring abuts against the inner bottom wall of the detection seat.

[0019] Furthermore, the airbag contains high-pressure helium gas.

[0020] Furthermore, a scraper sleeve is fitted onto the ceramic membrane tube, and the scraper sleeve and the ceramic membrane tube are in sliding fit. A driving mechanism is provided in the mounting base, and the driving mechanism is used to drive the scraper sleeve to move linearly on the ceramic membrane tube after the airbag volume is contracted.

[0021] Furthermore, the drive mechanism includes:

[0022] A movable frame is installed inside the gas storage cavity, and the scraper sleeve passes through the movable frame;

[0023] A push rod is horizontally fixed to the movable frame, and a second through hole is provided in the mounting base for the push rod to pass freely.

[0024] A piston is connected to the end of the push rod away from the movable frame. The mounting base has a communicating cavity for engaging the piston, and the piston slides freely within the communicating cavity.

[0025] A connecting pipe, one end of which is fixed to the detection seat and communicates with the installation space, and the other end of which is fixed to the mounting seat and communicates with the communicating cavity.

[0026] Furthermore, the scraper sleeve is provided with a striking unit, which is used to generate a striking vibration force on the ceramic membrane tube when the scraper sleeve moves in a straight line.

[0027] Furthermore, the tapping unit includes:

[0028] A striking pin, which is perpendicularly inserted through the periphery of the scraper sleeve and slides freely along the radial direction of the scraper sleeve;

[0029] A fixing block is fixedly connected to the end of the striking pin away from the scraper sleeve. A sliding cavity is provided around the periphery of the scraper sleeve for the fixing block to pass freely. A mounting block is fixedly connected to the end of the fixing block away from the scraper sleeve, and a roller is rotatably connected to the mounting block.

[0030] A strip plate is horizontally fixed to the inner wall of the gas storage cavity. The strip plate has multiple notches and grooves. The rollers roll on the surface of the strip plate and the inner wall of the notches and grooves.

[0031] A tensioning member is used to drive the fixed block to move toward the inside of the sliding cavity.

[0032] Furthermore, the tensioning member includes a tension spring wrapped around the striking pin, with both ends of the tension spring fixed to the fixing block and the inner wall of the sliding cavity, respectively.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] This invention, by setting up a ceramic membrane tube and mounting base, allows the gas generated in the transformer's internal oil tank to enter the ceramic membrane tube. Through the gas-liquid separation effect of the ceramic membrane tube, the gas passes through the ceramic membrane tube and enters the gas storage chamber. As the amount of gas increases, the puncturing mechanism punctures the gas bag, causing the gas bag to change from an expanded state to a contracted state, which triggers the detection mechanism to achieve the monitoring and early warning effect.

[0035] The present invention moves the movable frame by a drive mechanism when the airbag contracts, so that the scraper sleeve slides relative to the ceramic membrane tube during the movement, thereby cleaning the surface of the ceramic membrane tube and avoiding the impact of low permeability of the ceramic membrane tube on the gas-liquid separation efficiency.

[0036] This invention uses a movable frame that moves to make rollers roll on the surface of the strip plate and the inner wall of the notch groove. Combined with the tension of the tension spring on the fixed block, the striking pin strikes the ceramic membrane tube during the movement of the movable frame, causing the liquid on the surface of the ceramic membrane tube to be shaken off. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a transformer fault monitoring device according to the present invention;

[0038] Figure 2 for Figure 1 The structural diagram omitting the transformer is shown in the image.

[0039] Figure 3 for Figure 2 Cross-sectional view of the middle structure;

[0040] Figure 4 for Figure 3 Enlarged schematic diagram of a local structure at point A;

[0041] Figure 5 for Figure 2 A schematic diagram of the central structure from the front view angle;

[0042] Figure 6 for Figure 5 Cross-sectional view of the middle structure;

[0043] Figure 7 for Figure 2 Exploded view of the structure omitting the mounting base and detection base;

[0044] Figure 8 This is a schematic diagram of the structure of the movable frame, scraper sleeve, push rod and piston after assembly in this invention;

[0045] Figure 9 for Figure 8 Schematic diagram of the explosive decomposition of the middle part of the structure;

[0046] Figure 10 for Figure 9 Enlarged schematic diagram of the local structure at point B.

[0047] The following are the annotations for each item in the figure: 1. Transformer; 2. Oil tank; 3. Detector seat; 4. Mounting seat; 5. Oil pipe; 6. Vent hole; 7. Fixed pipe; 8. Connecting pipe; 9. Flange seat; 10. Inductive switch; 11. Pressure plate; 12. Airbag; 13. Partition plate; 14. Through cavity; 15. Connecting cavity; 16. Piston; 17. Push rod; 18. Movable frame; 19. Air storage cavity; 20. Ceramic membrane tube; 21. First through hole; 22. Needle; 23. Limiting ring; 24. Light load spring; 25. Float ball; 26. Lightweight sliding rod; 27. Strip plate; 28. Scraper sleeve; 29. ​​Notch groove; 30. Sliding cavity; 31. Tension spring; 32. Fixed block; 33. Knocking pin; 34. Roller. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Please see Figures 1-10 This invention provides a technical solution: a transformer fault monitoring device, including a transformer 1. An oil conservator 2 is connected to the top of the transformer 1 via an oil pipe 5. The oil pipe 5 communicates with the oil tank inside the transformer 1. One end of the oil pipe 5 extending out of the transformer 1 is connected to a mounting base 4. The end of the mounting base 4 away from the oil pipe 5 is connected to the oil conservator 2. Each of the axial ends of the mounting base 4 has a through cavity 14, and an air storage cavity 19 is formed inside the cavity. The two through cavities 14 communicate with the oil inlet of the oil conservator 2 and the oil outlet of the oil pipe 5, respectively. The mounting base 4 has an inner edge... A 4-axis annular array is provided with multiple ceramic membrane tubes 20 (for the structure and working principle of the ceramic membrane tubes 20, please refer to Chinese Patent Publication No. CN218871806U). The two ends of the ceramic membrane tubes 20 are respectively connected to two through cavities 14, so that the transformer oil in the oil pipe 5 can enter the oil conservator 2 from the oil pipe 5 and the ceramic membrane tubes 20. The outer wall of the mounting base 4 is welded with an upward-facing fixed pipe 7. The gas storage cavity 19 in the mounting base 4 is connected to the inside of the fixed pipe 7. The middle part of the ceramic membrane tubes 20 is located in the gas storage cavity 19.

[0050] A detection seat 3 is coaxially welded to the upper end of the fixed tube 7. A partition 13 is provided inside the detection seat 3, forming an installation space between the partition 13 and the inner top wall of the detection seat 3. An airbag 12 is placed within this installation space. The airbag 12 contains an inert gas (such as high-pressure helium, which is lighter than air), causing the airbag 12 to initially expand. An assembly hole is provided on the top of the detection seat 3, into which a flange seat 9 is fitted. The flange seat 9 is connected to the top of the detection seat 3 by screws. A recessed mounting hole is provided on the end face of the flange seat 9 facing the airbag 12, into which a pressure plate 1, capable of sliding freely up and down, is fitted. 1. In the initial state, the pressure plate 11 is pressed against the airbag 12 and locked into the clearance groove. The pressure plate 11 has a sensing block (not labeled in the figure) welded on its top surface. The flange seat 9 has a vertically inserted sensing switch 10. The sensing part of the sensing switch 10 is inserted into the hole of the flange seat 9 and works in conjunction with the sensing block. That is, when the sensing block moves, the sensing switch 10 can sense it and generate a sensing signal. The sensing signal is fed back to the external computer device through the wireless module (not shown in the figure). Then, the computer device determines whether the transformer 1 has a fault by whether it receives the sensing signal emitted by the sensing switch 10.

[0051] A float 25 is installed inside the fixed tube 7, allowing it to move freely up and down within the tube. A lightweight sliding rod 26 is coaxially fixed to the float 25, with its lower end fixed to the surface of the float 25. The upper end of the lightweight sliding rod 26 penetrates into the detection seat 3 and slides freely up and down. A needle 22 is welded to the upper end of the lightweight sliding rod 26. A first through hole 21 is provided in the partition 13 for the needle 22 to pass through freely. A limit ring 23 is fixedly sleeved on one end of the lightweight sliding rod 26 that penetrates into the detection seat 3. The lower end face of the limit ring 23 abuts against the inner bottom wall of the detection seat 3. A light-load spring 24 is installed inside the fixed tube 7, wrapped around the lightweight sliding rod 26. The spring has two ends that elastically abut against the bottom surface of the detection seat 3 and the float 25, respectively. When the transformer oil in the transformer 1 is electrolyzed by an electric arc to generate gas, the gas and transformer oil will flow with the oil pipe. 5. Gas enters the ceramic membrane tube 20. Due to the osmotic pressure on the inside and outside of the ceramic membrane tube 20, the gas will permeate the ceramic membrane tube 20 and enter the gas storage chamber 19. The transformer oil will enter the oil conservator 2 through the ceramic membrane tube 20. As the gas accumulates in the gas storage chamber 19, when it reaches a certain level, the gas will push the float 25 upward, which in turn will drive the lightweight sliding rod 26 upward, causing the piercing needle 22 to pierce the air bag 12, causing the inert gas in the air bag 12 to escape rapidly. At the same time, the volume of the air bag 12 shrinks. When the pressure plate 11 loses the resistance of the air bag 12, the pressure plate 11 will move downward under the action of gravity, causing the sensing block to move away from the sensing switch 10, which in turn causes the sensing switch 10 to generate a sensing signal. In addition, the light-load spring 24 is in a compressed state and accumulates elastic potential energy, which facilitates the subsequent movement of the light-load spring 24 to drive the lightweight sliding rod 26 downward to reset.

[0052] A scraper sleeve 28 is fitted on the ceramic membrane tube 20, and the scraper sleeve 28 and the ceramic membrane tube 20 are in sliding fit. A movable frame 18 is installed in the gas storage chamber 19, and the scraper sleeve 28 passes through the movable frame 18. A push rod 17 is horizontally connected on the movable frame 18, and a second through hole is opened in the mounting base 4 for the push rod 17 to pass freely. A piston 16 is connected to the end of the push rod 17 away from the movable frame 18. A connecting cavity 15 is opened in the mounting base 4 for the piston 16 to engage. The piston 16 slides freely in the connecting cavity 15. A connecting pipe 8 is connected to the detection seat 3. One end of the connecting pipe 8 is in communication with the installation space, and the other end of the connecting pipe 8 is fixed to the mounting base 4 and in communication with the connecting cavity 15.

[0053] When the airbag 12 is punctured by the needle 22 and ruptured, the high-pressure helium gas inside will enter the connecting cavity 15 from the connecting tube 8 and push the piston 16 to move away from the gas storage cavity 19. During the movement, the piston 16 will drive the push rod 17 to move, so that the movable frame 18 will drive the scraper sleeve 28 to move, so that the scraper sleeve 28 will slide on the ceramic membrane tube 20. This is to prevent foreign objects, oil stains, etc. from adhering to the outer wall of the ceramic membrane tube 20 during long-term use, which will block the membrane pores of the ceramic membrane tube 20 and affect the gas permeability. Since the scraper sleeve 28 can rotate, the cleaning effect is better. In addition, the outer wall of the mounting base 4 is provided with a vent hole 6 that runs through the connecting cavity 15, so that when the piston 16 moves away from the movable frame 18, the air in the connecting cavity 15 can escape from the vent hole 6, avoiding resistance to the movement of the piston 16. In addition, the scraper sleeve 28 is made of rubber material, which avoids large wear on the surface of the ceramic membrane tube 20.

[0054] Furthermore, a striking pin 33 is vertically inserted through the periphery of the scraper sleeve 28, and the striking pin 33 slides freely along the radial direction of the scraper sleeve 28. A fixing block 32 is welded to the end of the striking pin 33 away from the scraper sleeve 28. A sliding cavity 30 is opened around the periphery of the scraper sleeve 28 for the fixing block 32 to pass freely. An installation block is fixedly connected to the end of the fixing block 32 away from the scraper sleeve 28. A roller 34 is rotatably connected to the installation block. A strip plate 27 is horizontally welded to the inner wall of the air storage cavity 19. Multiple notches and grooves 29 are opened on the strip plate 27. The roller 34 rolls on the surface of the strip plate 27 and the inner wall of the notches and grooves 29. A tension spring 31 is wound around the striking pin 33. The two ends of the tension spring 31 are fixedly connected to the fixing block 32 and the inner wall of the sliding cavity 30, respectively.

[0055] When the scraper sleeve 28 moves on the ceramic membrane tube 20, the roller 34 will roll on the surface of the strip plate 27, and the roller 34 will roll alternately on the surface of the strip plate 27 and the inner wall of the notch groove 29. When the roller 34 rolls from the surface of the strip plate 27 into the notch groove 29, the tension of the tension spring 31 causes the fixing block 32 to move quickly toward the inside of the scraper sleeve 28, and causes the striking pin 33 to strike the ceramic membrane tube 20, thereby allowing the liquid adhering to the surface of the ceramic membrane tube 20 to be knocked off, preventing the liquid from being unable to be scraped off by the scraper sleeve 28 and affecting the permeability of the ceramic membrane tube 20.

[0056] The working principle of this invention is as follows: When the transformer oil in transformer 1 is electrolyzed by an electric arc to generate gas, the gas and transformer oil will enter the ceramic membrane tube 20 through the oil pipe 5. Due to the osmotic pressure on the inside and outside of the ceramic membrane tube 20, the gas will permeate the ceramic membrane tube 20 and enter the gas storage chamber 19. The transformer oil will enter the oil conservator 2 through the ceramic membrane tube 20. As the gas accumulates in the gas storage chamber 19, when it reaches a certain level, the gas will push the float 25 upward, which in turn will drive the lightweight sliding rod 26 upward, causing the piercing needle 22 to pierce the air bladder 12, allowing the inert gas in the air bladder 12 to escape rapidly. At the same time, the air bladder... When the volume of airbag 12 decreases and the pressure plate 11 loses the resistance of airbag 12, the pressure plate 11 will move downward under the action of gravity, causing the sensing block to move away from the induction switch 10. This causes the induction switch 10 to generate an induction signal. The induction signal is fed back to an external computer device through a wireless module (not shown in the figure). The computer device determines whether the transformer 1 has a fault by whether it receives the induction signal emitted by the induction switch 10. That is, a fault is determined when a signal is generated, and no fault is determined otherwise. When airbag 12 is punctured by needle 22 and ruptured, the high-pressure helium gas inside will enter the connecting pipe 8. The piston 16 moves away from the gas storage chamber 19 within the cavity 15. During this movement, the piston 16 drives the push rod 17 to move, causing the movable frame 18 to move the scraper sleeve 28. This allows the scraper sleeve 28 to slide on the ceramic membrane tube 20, preventing foreign matter, oil, or other contaminants from accumulating on the outer wall of the ceramic membrane tube 20 during long-term use and clogging the membrane pores, thus affecting gas permeability. As the scraper sleeve 28 moves on the ceramic membrane tube 20, the roller 34 rolls on the surface of the strip plate 27, alternating between rolling on the surface of the strip plate 27 and the inner wall of the notch groove 29. 4. When the strip plate 27 rolls into the notch 29, the tension of the tension spring 31 causes the fixing block 32 to move quickly toward the inside of the scraper sleeve 28, and causes the striking pin 33 to strike the ceramic membrane tube 20, thereby causing the liquid adhering to the surface of the ceramic membrane tube 20 to be knocked off, preventing the liquid from being scraped off by the scraper sleeve 28 and affecting the permeability of the ceramic membrane tube 20. When the staff performs transformer maintenance, the flange seat 9 is removed and the inflated air bag 12 is repositioned. In addition, the air extraction device is used to extract air from the connecting pipe 8, causing the piston 16 to move toward the air storage chamber 19 and reset.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer fault monitoring device, comprising a transformer (1), wherein an oil conservator (2) is connected to the top of the transformer (1) via an oil pipe (5), characterized in that, Also includes: Mounting base (4), the two ends of the mounting base (4) are respectively connected to the oil inlet of the oil conservator (2) and the oil outlet of the oil pipe (5). An air storage chamber (19) is opened inside the mounting base (4). A through cavity (14) is opened at each of the two axial ends of the mounting base (4). The two through cavities (14) are respectively connected to the oil inlet of the oil conservator (2) and the oil outlet of the oil pipe (5). Multiple ceramic membrane tubes (20) are arranged in an array along the axial direction of the mounting base (4) and inserted into the two through cavities (14) at both ends, with the middle part located in the gas storage cavity (19). A fixed tube (7) is fixedly connected to the mounting base (4), and the interior of the fixed tube (7) is in communication with the air storage chamber (19). The end of the fixed tube (7) away from the mounting base (4) is connected to a detection base (3). The detection base (3) is hollow inside and is fixedly connected to a partition (13). The partition (13) and the inner top wall of the detection base (3) form an installation space, and an airbag (12) is placed in the installation space. A puncture mechanism is used to puncture the airbag (12) to reduce the volume of the airbag (12); The testing mechanism is used to detect the volume contraction of the airbag (12); The testing institutions include: Flange seat (9), the flange seat (9) is installed in the assembly hole opened on the top of the detection seat (3), and the flange seat (9) has a recessed mounting hole on one end face facing the airbag (12); Pressure plate (11), which is slidably installed in the mounting hole and in contact with the surface of the airbag (12), and the upper surface of the pressure plate (11) is provided with a sensing block; A sensor switch (10) is mounted on the flange seat (9) and used in conjunction with the sensor block; The piercing mechanism includes: A float (25) is placed inside the fixed tube (7) and can move freely up and down; A lightweight sliding rod (26) is fixed at its lower end to the surface of the float (25), and at its upper end, it is inserted into the detection seat (3) and can slide freely up and down. The needle (22) is fixed to the upper end of the lightweight sliding rod (26), and the partition (13) has a first through hole (21) for the needle (22) to pass through freely.

2. The transformer fault monitoring device according to claim 1, characterized in that, A light-load spring (24) is wound around the lightweight sliding rod (26). The two ends of the light-load spring (24) elastically abut against the float (25) and the detection seat (3) respectively. A limit ring (23) is sleeved on the upper end of the lightweight sliding rod (26). The lower end face of the limit ring (23) abuts against the inner bottom wall of the detection seat (3).

3. The transformer fault monitoring device according to claim 1, characterized in that, The airbag (12) contains high-pressure helium.

4. The transformer fault monitoring device according to claim 1, characterized in that, A scraper sleeve (28) is fitted on the ceramic membrane tube (20). The scraper sleeve (28) and the ceramic membrane tube (20) are in sliding fit. A driving mechanism is provided in the mounting base (4). The driving mechanism is used to drive the scraper sleeve (28) to move linearly on the ceramic membrane tube (20) after the airbag (12) shrinks in volume.

5. A transformer fault monitoring device according to claim 4, characterized in that, The drive mechanism includes: Movable frame (18), the movable frame (18) is placed in the gas storage cavity (19), and the scraper sleeve (28) passes through the movable frame (18); Push rod (17), the push rod (17) is horizontally fixed to the movable frame (18), and the mounting base (4) has a second through hole for the push rod (17) to pass freely; Piston (16), the piston (16) is connected to the end of the push rod (17) away from the movable frame (18), and the mounting base (4) has a communicating cavity (15) for the piston (16) to engage, and the piston (16) slides freely in the communicating cavity (15); A connecting pipe (8) is fixed at one end to the detection seat (3) and communicates with the installation space. The other end of the connecting pipe (8) is fixed to the mounting seat (4) and communicates with the connecting cavity (15).

6. The transformer fault monitoring device according to claim 5, characterized in that, The scraper sleeve (28) is provided with a striking unit, which is used to generate a striking vibration force on the ceramic membrane tube (20) when the scraper sleeve (28) moves in a straight line.

7. A transformer fault monitoring device according to claim 6, characterized in that, The striking unit includes: A striking pin (33) is perpendicularly inserted through the periphery of the scraper sleeve (28) and slides freely along the radial direction of the scraper sleeve (28); A fixing block (32) is fixedly connected to the end of the striking pin (33) away from the scraper sleeve (28). The scraper sleeve (28) has a sliding cavity (30) around its periphery for the fixing block (32) to pass freely. A mounting block is fixedly connected to the end of the fixing block (32) away from the scraper sleeve (28). A roller (34) is rotatably connected to the mounting block. A strip plate (27) is horizontally fixed to the inner wall of the gas storage chamber (19). The strip plate (27) has multiple notches (29). The roller (34) rolls on the surface of the strip plate (27) and the inner wall of the notches (29). A tensioning member is used to drive the fixed block (32) to move toward the inside of the sliding cavity (30).

8. A transformer fault monitoring device according to claim 7, characterized in that, The tensioning member includes a tension spring (31) wrapped around the striking pin (33), with both ends of the tension spring (31) fixed to the fixing block (32) and the inner wall of the sliding cavity (30), respectively.

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