A commutation valve voiceprint monitoring device

Abstract

The present invention relates to a converter valve acoustic fingerprint monitoring device, which includes a pipe body and a plurality of mobile sensor mechanisms; the cross-section of the pipe body is in a "C" shape, a rack is fixed on the left inner wall of the pipe body, a second groove is provided on the upper inner wall of the pipe body, a first groove is provided on the lower inner wall of the pipe body, a plurality of signal communication strips are fixed on the bottom of the second groove, and two power supply strips are fixed on the bottom of the first groove. The mobile sensor mechanism includes a mobile frame, an acoustic wave sensor is installed on the right side of the mobile frame, a motor and a gear are installed on the left side of the mobile frame, a signal transmission contact module is provided on the top of the second clamping block, and two electrode contacts are provided on the bottom of the first clamping block. The mobile frame is embedded inside the pipe body, the gear meshes with the rack, the two electrode contacts are respectively in contact with the two power supply strips, and the upper end of the signal transmission contact module is in contact with the signal communication strip. This converter valve acoustic fingerprint monitoring device can ensure the acquisition frequency at each position and ensure the signal acquisition volume.

Description

Technical Field

[0001] The present invention relates to the technical field of converter valve monitoring, and particularly to a converter valve voiceprint monitoring device. Background Art

[0002] A converter valve is a core device for realizing the conversion of electric energy from AC to DC and then back to AC, and occupies an important position in a DC power transmission system. Its value accounts for about 22-25% of the total price of the complete sets of equipment in a converter station. However, as the operation years of the converter valve increase, the surface insulation materials of the electrical equipment operating therein may age, the connection terminals between the electrical equipment may become loose, and since dust in the air is easily deposited on the surface of the converter valve components, after these defects occur and under the complex operating conditions of the converter valve, partial discharge is very likely to occur, thereby causing damage to the converter valve components, affecting the normal operation of the converter valve, and resulting in serious consequences such as DC outage, seriously affecting the operation reliability of the DC system.

[0003] Since the converter valve is a core device of the converter station and is composed of components such as thyristors, damping capacitors, voltage-sharing capacitors, damping resistors, voltage-sharing resistors, saturable reactors, and thyristor control units. Its structure is complex and compact. Therefore, the power department requires that in order not to affect the safe operation of the converter valve, monitoring equipment is not allowed to be installed on the converter valve, resulting in the current existing on-line monitoring technologies and products being unable to be installed and used on the converter valve. Therefore, it is necessary to use a voiceprint monitoring device to monitor the converter valve.

[0004] The converter valve is located at a relatively far distance from the surrounding walls and the ground (about 5-6 meters), and the equipment inside the valve hall is all under high voltage, so the acoustic wave sensor cannot extend too long. Therefore, currently, conventional acoustic wave sensors can only be installed in the inspection corridor. Due to the long distance, the sound collection effect of the sensor is seriously affected. Second, the valve hall of the converter station is a closed space with various electrical equipment inside. When the equipment is operating, it will generate vibration noise; at the same time, there are cooling water pipelines inside the valve hall, and the water flow in the pipelines also generates noise; at the same time, the converter valve is connected through a wall bushing, and the operation noise of the outdoor equipment will also be transmitted into the room, which will also affect the sound collection effect of the sound collection sensor. Therefore, it is necessary to collect acoustic signals in a large range for analysis in order to ensure the monitoring of the fault phenomena of the converter valve. Therefore, a converter valve voiceprint monitoring device is needed to solve the above technical problems. Summary of the Invention

[0005] The present invention provides a converter valve voiceprint monitoring device for the technical problems existing in the prior art.

[0006] The technical solution for the present invention to solve the above technical problems is as follows: A converter valve voiceprint monitoring device includes a pipe body and a plurality of mobile sensor mechanisms;

[0007] An opening is provided on the right side of the tube body, and the cross section of the tube body is "C"-shaped. A rack is fixed on the left inner wall of the tube body, a second groove is provided on the upper inner wall of the tube body, and a first groove is provided on the lower inner wall of the tube body. A plurality of mutually parallel and mutually insulated signal communication bars are fixed on the bottom of the second groove, and two mutually parallel power supply bars are fixed on the bottom of the first groove. The rack, the first groove, the second groove, the signal communication bar, and the power supply bar are all parallel to the central axis of the tube body;

[0008] The mobile sensor mechanism includes a mobile frame, an acoustic wave sensor is installed on the right side of the mobile frame, a motor and a gear are installed on the left side of the mobile frame, the gear is connected to the output shaft of the motor, a second blocking block is arranged on the top of the mobile frame, a first blocking block is arranged on the bottom of the mobile frame, a signal transmission contact module is arranged on the top of the second blocking block, two electrode contacts are arranged on the bottom of the first blocking block, and support rollers are arranged on the bottom of the first blocking block and the top of the second blocking block;

[0009] The plurality of mobile sensor mechanisms are arranged equidistantly, the mobile frame is embedded in the interior of the tube body, the gear is meshed with the rack, the acoustic wave sensor passes through the opening and extends out of the tube body, the first positioning block is embedded in the interior of the first groove and the two are slidably connected, the second positioning block is embedded in the interior of the second groove and the two are slidably connected, the two electrode contacts are respectively in contact with the two power supply bars, the upper end of the signal transmission contact module is in contact with the signal communication bar, and the support roller is in rolling contact with the inner wall of the tube body.

[0010] Preferably, in the above-mentioned converter valve soundprint monitoring device, an insulating strip is arranged between adjacent signal communication strips, the transmission contact module includes a plurality of conductive columns arranged in parallel, a plurality of cylindrical holes are arranged on the upper end surface of the second clamping block, the conductive columns are embedded in the cylindrical holes and the two are in sliding contact, the conductive columns correspond one to one with the signal communication strips, and an adjustment unit is installed on the second clamping block, the adjustment unit is used to adjust the telescopic movement of the conductive column, and keep only one of the conductive columns extending out of the second clamping block.

[0011] Preferably, in the above-mentioned converter valve soundprint monitoring device, the adjustment unit includes a lever, the lever is inserted into the interior of the second positioning block, the lever and the conducting column are perpendicular to each other, a plurality of lifting support blocks are equidistantly arranged on the lever, the lifting support blocks correspond to the conducting columns one by one, and the angles between any two adjacent lifting support blocks are the same, when the lifting support block rotates to contact with the conducting column, the lifting support block lifts the conducting column, and when the lifting support block rotates and loses contact with the conducting column, the conducting column falls back to its original position.

[0012] Preferably, in the above commutation valve voiceprint monitoring device, a cylindrical limiting cavity is arranged outside the cylindrical hole, a first spring is sleeved on the conducting column, the first spring is located in the cylindrical limiting cavity, and the upper end of the first spring abuts against the upper end surface of the cylindrical limiting cavity. A limiting plate is arranged on the conducting column, the lower end of the first spring abuts against the limiting plate, and the cylindrical hole is coaxial with the cylindrical limiting cavity.

[0013] Preferably, in the above commutation valve voiceprint monitoring device, a plurality of first positioning blocks arranged in a circumferential array are arranged on the lever, and a plurality of second positioning blocks arranged in a circumferential array are arranged at the left end socket of the second clamping block. The number of the first positioning blocks is the same as that of the second positioning blocks, and the side surface of the first positioning block abuts against the side surface of the second positioning block, which is convenient for positioning when the lever rotates by the same angle each time.

[0014] Preferably, in the above commutation valve voiceprint monitoring device, a plurality of the signal communication strips are symmetrically distributed on both sides of the second groove.

[0015] Preferably, in the above commutation valve voiceprint monitoring device, two of the power supply strips are symmetrically distributed on both sides of the first groove.

[0016] Preferably, in the above commutation valve voiceprint monitoring device, lubricating oil is arranged on the side walls of the first groove and the second groove.

[0017] Preferably, in the above commutation valve voiceprint monitoring device, the electrode contact is in elastic contact with the power supply strip, and the conducting column is in elastic contact with the signal communication strip.

[0018] Preferably, in the above commutation valve voiceprint monitoring device, the supporting roller is in elastic contact with the inner wall of the pipe body.

[0019] The beneficial effects of the present invention are as follows: The pipe body is installed in the inspection corridor outside the commutation valve. By arranging a plurality of moving sensor mechanisms arranged at equal intervals in the pipe body and synchronously operating each motor to keep each moving sensor mechanism operating orderly, these moving sensor mechanisms can collect a large amount of sound signals within the range covered by the pipe body. Using a plurality of moving sensor mechanisms to collect synchronously can ensure the acquisition frequency at each position and ensure the signal acquisition volume, so as to accurately monitor the fault phenomena of the commutation valve. The moving sensor mechanisms in the pipe body have the same structure, which is convenient for processing and production. Only the conducting columns need to be adjusted before installing them into the pipe body. It is convenient to use and has a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 Schematic diagram of the cooperation between the pipe body and the mobile sensor mechanism;

[0022] Figure 3 Schematic diagram of the cross-sectional structure of the pipe body;

[0023] Figure 4 Schematic diagram of the structure of the mobile sensor mechanism;

[0024] Figure 5 Schematic diagram of the structure of the second clamping block;

[0025] Figure 6 For Figure 5 Partial enlarged view of the A position in

[0026] Figure 7 Schematic diagram of the installation structure of the conduction column;

[0027] Figure 8 For Figure 2 Partial enlarged view of the B position in

[0028] Figure 9 For Figure 2 Partial enlarged view of the C position in

[0029] Figure 10 Side view of the lever;

[0030] Figure 11 Cross-sectional view of the lever at the lifting support block;

[0031] Figure 12 Schematic diagram of the cooperation structure between the first positioning block and the second positioning block;

[0032] Figure 13 Schematic diagram of the installation structure of the support roller.

[0033] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0034] 1. Acoustic wave sensor, 2. Pipe body, 3. Mobile frame, 4. First clamping block, 5. Second clamping block, 6. Rack, 7. First groove, 8. Second groove, 9. Signal communication strip, 10. Power supply strip, 11. Motor, 12. Gear, 13. Opening, 14. Notch, 15. Support roller, 16. Electrode contact, 17. Conduction column, 18. Lever, 19. First spring, 20. Lifting support block, 21. First positioning block, 22. Cylindrical limiting cavity, 23. Limiting plate, 24. Second positioning block, 25. Second spring. Specific embodiments

[0035] The principles and features of the present invention will be described below with reference to the attached drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0036] As Figure 1 、 Figure 2 shown, a commutation valve voiceprint monitoring device includes a pipe body 2 and a plurality of mobile sensor mechanisms.

[0037] As Figure 1 、 Figure 2 、 Figure 3 shown, an opening 13 is provided on the right side surface of the pipe body 2, and the cross-section of the pipe body 2 is in a "C" shape. A rack 6 is fixed on the left inner wall of the pipe body 2, a second groove 8 is provided on the upper inner wall of the pipe body 2, and a first groove 7 is provided on the lower inner wall of the pipe body 2. The second groove 8 and the first groove 7 are centrosymmetric about the central axis of the pipe body 2. A plurality of mutually parallel signal communication strips 9 are fixed on the bottom of the second groove 8, and insulating strips are provided between adjacent signal communication strips 9 to prevent conduction between the signal communication strips 9. Two mutually parallel power supply strips 10 are fixed on the bottom of the first groove 7. The rack 6, the first groove 7, the second groove 8, the signal communication strips 9, and the power supply strips 10 are all parallel to the central axis of the pipe body 2. A plurality of signal communication strips 9 are symmetrically distributed on both sides of the second groove 8. Two power supply strips 10 are symmetrically distributed on both sides of the first groove 7.

[0038] As Figure 1 、 Figure 2 、 Figure 4 shown, the mobile sensor mechanism includes a mobile frame 3, an acoustic wave sensor 1 is installed on the right side of the mobile frame 3, a motor 11 and a gear 12 are installed on the left side of the mobile frame 3, a notch 14 is provided on the left side of the mobile frame 3, the gear 12 is installed at the notch 14, the gear 12 is connected to the output shaft of the motor 11, a second clamping block 5 is provided on the top of the mobile frame 3, a first clamping block 4 is provided on the bottom of the mobile frame 3, and a signal transmission contact module is provided on the top of the second clamping block 5. A plurality of mobile sensor mechanisms are arranged at equal intervals, the mobile frame 3 is embedded inside the pipe body 2, the gear 12 meshes with the rack 6, and the motor 11 rotates to drive the rack 6 to rotate, thereby driving the mobile sensor mechanism to move.

[0039] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 、 Figure 9As shown, the acoustic wave sensor 1 penetrates through the opening 13 and extends outside the tube body 2 for receiving external acoustic signals. The first clamping block 4 is embedded inside the first groove 7 and the two are slidably connected. The second clamping block 5 is embedded inside the second groove 8 and the two are slidably connected, thereby ensuring that the attitude of the moving frame 3 inside the tube body 2 will not change, enabling the moving frame 3 to be slidably connected to the tube body 2, and enabling it to translate inside the tube body 2 through the cooperation of the motor 11, the gear 12, and the rack 6. Lubricating oil is provided on the side walls of the first groove 7 and the second groove 8 to reduce the sliding friction inside the grooves. Support rollers 15 are provided at the bottom of the first clamping block 4 and the top of the second clamping block 5. The support rollers 15 are in rolling contact with the inner wall of the tube body 2. Further, the support rollers 15 are in elastic contact with the inner wall of the tube body 2, and an installation structure as shown in Figure 13 can be adopted. By sleeving the second spring 25 on the support column at the upper end of the support roller 15, a proper pressure is maintained between the second spring 25 and the inner wall of the tube body 2.

[0040] Two electrode contacts 16 are provided at the bottom of the first clamping block 4. The two electrode contacts 16 are respectively in contact with two power supply bars 10. The power supply bars 10 are respectively connected to the positive and negative poles of an external power supply, and power is taken through the electrode contacts 16 to supply power to the motor 11.

[0041] As shown in Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 10 , Figure 11 , the transmission contact module includes a plurality of conduction columns 17 arranged in parallel. A plurality of cylindrical holes are provided on the upper end surface of the second clamping block 5. The conduction columns 17 are embedded inside the cylindrical holes and the two are slidably in contact. The conduction columns 17 correspond to the signal communication bars 9 one by one. An adjustment unit is installed on the second clamping block 5. The adjustment unit is used to adjust the telescopic movement of the conduction columns 17 and keep only one conduction column 17 extending outside the second clamping block 5. The adjustment unit includes a lever 18. The lever 18 is inserted inside the second clamping block 5. The lever 18 is perpendicular to the conduction columns 17. A plurality of lifting support blocks 20 are equidistantly arranged on the lever 18. The lifting support blocks 20 are made of insulating material. The lifting support blocks 20 correspond to the conduction columns 17 one by one, and the angle between any two adjacent lifting support blocks 20 is the same. A cylindrical limiting cavity 22 is provided outside the cylindrical hole. A first spring 19 is sleeved on the conduction column 17. The first spring 19 is located inside the cylindrical limiting cavity 22, and the upper end of the first spring 19 abuts against the upper end surface of the cylindrical limiting cavity 22. A limiting plate 23 is provided on the conduction column 17. The lower end of the first spring 19 abuts against the limiting plate 23, and the cylindrical hole is coaxial with the cylindrical limiting cavity 22.

[0042] Before the conduction post 17 is subjected to the force of the lifting support block 20, due to the elastic force of the first spring 19, the conduction post 17 is located within the cylindrical hole. At this time, the lower end surface of the limiting plate 23 abuts against the lower end surface of the cylindrical limiting cavity 22, and the conduction post 17 does not protrude from the second clamping block 5. When the lifting support block 20 rotates to contact the conduction post 17, the lifting support block 20 pushes the conduction post 17 upward. When the lifting support block 20 rotates and disengages from the conduction post 17, the conduction post 17 falls back to its original position, thereby adjusting the protruding state of each conduction post 17 through the rotation of the lever 18. The lifting support block 20 is arranged such that only one conduction post 17 is pushed out each time, and the remaining conduction posts 17 are located within the cylindrical holes of the second clamping block 5.

[0043] Since each conduction post 17 is electrically connected to the acoustic wave sensor 1, and the signal communication strips 9 are insulated from each other, when a conduction post 17 contacts one of the signal communication strips 9, the signal received by the acoustic wave sensor 1 is transmitted through this signal communication strip 9. Each acoustic wave sensor 1 on each mobile sensor mechanism within the tube body 2 needs to rely on a signal communication strip 9 to transmit signals. Therefore, when only one conduction post 17 protrudes, the acoustic wave sensor 1 only occupies one signal communication strip 9 transmission channel. To standardize the product and facilitate processing, and also because each acoustic wave sensor 1 on each mobile sensor mechanism needs to occupy a different signal communication strip 9 to transmit signals, when installing the mobile sensor mechanism into the tube body 2, the conduction posts 17 on the mobile sensor mechanism need to be adjusted in an orderly manner through the lever 18, ensuring that the protruding states of the conduction posts 17 at various positions on each mobile sensor mechanism are inconsistent. If each conduction post 17 corresponds to a number, then the numbers of the protruding conduction posts 17 on each mobile sensor mechanism cannot be repeated, so as to ensure that each signal communication strip 9 is only occupied by one acoustic wave sensor 1 and signal chaos will not occur. For a compact design and to avoid external high-voltage electric field interference, this internal communication design is adopted. The tube body 2 can be made of an insulating material with good shielding effect to reduce external electric field interference.

[0044] It should be noted that the electrode contact 16 is in elastic contact with the power supply strip 10, and the conduction post 17 is in elastic contact with the signal communication strip 9. A ball-type installation method can be adopted at the ends of the electrode contact 16 and the conduction post 17 to make them in rolling contact. A ballpoint pen cylindrical installation structure can be used, and the elastic contact method can adopt the installation method of adding a spring to the upper end of the support roller 15 to ensure that the ends of the electrode contact 16 and the conduction post 17 are more stable during moving contact.

[0045] In addition, to ensure that the lever 18 can stay at a fixed position each time it rotates and only one conduction post 17 protrudes, it is necessary to position the rotation of the lever 18. The number of positioning positions is the same as the number of conduction posts 17 controlled by the lever 18, ensuring that after each rotation of the lever 18, it stays at this position and one corresponding conduction post 17 protrudes. As Figure 12 shown, by arranging a plurality of first positioning blocks 21 in a circular array on the lever 18, and arranging a plurality of second positioning blocks 24 in a circular array at the left end socket of the second clamping block 5, the number and shape and size of the first positioning blocks 21 and the second positioning blocks 24 are the same. The side surface of the first positioning block 21 abuts against the side surface of the second positioning block 24. When the lever 18 rotates, the friction between the positioning holes 21 must be overcome. When the positioning blocks are engaged with each other, this friction changes instantaneously, so that the rotation of the lever 18 can be clearly positioned by hand feeling. A screwdriver slot can be provided at the end of the lever 18 for easy adjustment and rotation with a screwdriver. It can be adjusted and rotated once before installation, and no further adjustment is required after installation.

[0046] During use, the pipe body 2 is installed in the inspection corridor around the converter valve. By arranging a plurality of moving sensor mechanisms arranged at equal intervals in the pipe body 2 and keeping the moving sensor mechanisms running orderly through the synchronous operation of each motor, these moving sensor mechanisms can collect a large number of acoustic signals within the range covered by the pipe body 2. Synchronous collection using a plurality of moving sensor mechanisms can ensure the collection frequency at each position and ensure the signal collection volume.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation of the present invention. In addition, "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0048] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A commutation valve acoustic fingerprint monitoring device, characterized in that: Comprising a tube body (2) and a plurality of mobile sensor mechanisms; An opening (13) is provided on the right side surface of the tube body (2). The cross-section of the tube body (2) is in a "C" shape. A rack (6) is fixed on the left inner wall of the tube body (2). A second groove (8) is provided on the upper inner wall of the tube body (2). A first groove (7) is provided on the lower inner wall of the tube body (2). A plurality of mutually parallel and insulated signal communication strips (9) are fixed on the bottom of the second groove (8). Two mutually parallel power supply strips (10) are fixed on the bottom of the first groove (7). The rack (6), the first groove (7), the second groove (8), the signal communication strips (9), and the power supply strips (10) are all parallel to the central axis of the tube body (2); The mobile sensor mechanism includes a mobile frame (3). An acoustic wave sensor (1) is installed on the right side of the mobile frame (3). A motor (11) and a gear (12) are installed on the left side of the mobile frame (3). The gear (12) is connected to the output shaft of the motor (11). A second clamping block (5) is provided on the top of the mobile frame (3). A first clamping block (4) is provided on the bottom of the mobile frame (3). A signal transmission contact module is provided on the top of the second clamping block (5). Two electrode contacts (16) are provided on the bottom of the first clamping block (4). Support rollers (15) are provided on the bottom of the first clamping block (4) and the top of the second clamping block (5); A plurality of the mobile sensor mechanisms are arranged at equal intervals. The mobile frame (3) is embedded inside the tube body (2). The gear (12) meshes with the rack (6). The acoustic wave sensor (1) penetrates through the opening (13) and extends outside the tube body (2). The first clamping block (4) is embedded inside the first groove (7) and the two are slidably connected. The second clamping block (5) is embedded inside the second groove (8) and the two are slidably connected. The two electrode contacts (16) are respectively in contact with the two power supply strips (10). The upper end of the signal transmission contact module is in contact with the signal communication strips (9). The support rollers (15) are in rolling contact with the inner wall of the tube body (2).

2. The commutation valve voiceprint monitoring device according to claim 1, characterized in that: An insulating strip is provided between adjacent signal communication strips (9). The transmission contact module includes a plurality of parallel conduction columns (17). A plurality of cylindrical holes are provided on the upper end surface of the second clamping block (5). The conduction columns (17) are embedded inside the cylindrical holes and the two are slidably in contact. The conduction columns (17) correspond to the signal communication strips (9) one by one. An adjustment unit is installed on the second clamping block (5). The adjustment unit is used to adjust the telescopic movement of the conduction columns (17) and keep only one of the conduction columns (17) extending outside the second clamping block (5).

3. The commutation valve voiceprint monitoring device according to claim 2, wherein: The adjusting unit includes a lever (18). The lever (18) is inserted into the second clamping block (5). The lever (18) is perpendicular to the conduction column (17). A plurality of lifting support blocks (20) are equidistantly arranged on the lever (18). The lifting support blocks (20) correspond to the conduction columns (17) one by one. The angle between any two adjacent lifting support blocks (20) is the same. When the lifting support block (20) rotates to contact the conduction column (17), the lifting support block (20) jacks up the conduction column (17). When the lifting support block (20) rotates and disengages from the conduction column (17), the conduction column (17) falls back to its original position.

4. The commutation valve acoustic fingerprint monitoring device according to claim 3, wherein: A cylindrical limiting cavity (22) is arranged outside the cylindrical hole. A first spring (19) is sleeved on the conduction column (17). The first spring (19) is located in the cylindrical limiting cavity (22). The upper end of the first spring (19) abuts against the upper end surface of the cylindrical limiting cavity (22). A limiting plate (23) is arranged on the conduction column (17). The lower end of the first spring (19) abuts against the limiting plate (23). The cylindrical hole is coaxial with the cylindrical limiting cavity (22).

5. The acoustic fingerprint monitoring device for a commutation valve according to claim 3, characterized in that: A plurality of first positioning blocks (21) arranged in a circumferential array are arranged on the lever (18). A plurality of second positioning blocks (24) arranged in a circumferential array are arranged at the left end socket of the second clamping block (5). The number of the first positioning blocks (21) is the same as that of the second positioning blocks (24). The side surface of the first positioning block (21) abuts against the side surface of the second positioning block (24), which is convenient for positioning when the lever (18) rotates the same angle each time.

6. The converter valve acoustic fingerprint monitoring device according to claim 1, characterized in that: Multiple signal communication strips (9) are symmetrically distributed on both sides of the second groove (8).

7. The acoustic fingerprint monitoring device for a commutation valve according to claim 1, characterized in that: Two power supply strips (10) are symmetrically distributed on both sides of the first groove (7).

8. The commutation valve voiceprint monitoring device according to claim 1, characterized in that: Lubricating oil is arranged on the side walls of the first groove (7) and the second groove (8).

9. The converter valve soundprint monitoring device according to claim 2, characterized in that: The electrode contact (16) is in elastic contact with the power supply strip (10), and the conduction column (17) is in elastic contact with the signal communication strip (9).

10. The commutation valve voiceprint monitoring device according to claim 1, characterized in that: The support roller (15) is in elastic contact with the inner wall of the pipe body (2).

Images