A power cabinet fault diagnosis device

Abstract

The present invention relates to the field of power equipment maintenance, and particularly to a power cabinet fault diagnosis device. The present invention provides such a power cabinet fault diagnosis device, which includes an insulating rod and a main reel, etc.; the insulating rod is connected to the main reel. For a power cabinet fault diagnosis device described herein, an insulating tube and a sound insulation tape that are stacked on each other are wound around the main shaft, reducing the noise that appears during sound transmission. With the cooperation of the magnetic attraction mechanism, the sound transmission mechanism is accurately released and adsorbed at the target position to collect sound. When the magnetic attraction mechanism detects a leakage phenomenon, the magnetic attraction mechanism quickly ejects the sound transmission mechanism, reminding the maintenance personnel to be cautious of electric shock. It solves the technical problems that, limited by the telescopic length and the controllable range of the angle adjustment of the listening rod, only the working sound on the surface of the power cabinet can be heard through the listening rod, and serious electric shock is likely to occur during the process of the maintenance personnel deeply placing the listening rod, affecting the safe progress of the power cabinet fault diagnosis.

Description

Technical Field

[0001] The present invention relates to the field of power equipment maintenance, and particularly to a power cabinet fault diagnosis device. Background Art

[0002] Electrical equipment has been widely used in production, and electrical faults are inevitable. How to troubleshoot electrical faults is a major problem faced by electricians. Among them, power cabinet fault diagnosis is a prominent problem faced by and to be solved by electrical maintenance personnel. Especially for the fault diagnosis of high-voltage power cabinets, during live inspection operations, safe equipment is needed to help maintenance personnel diagnose power cabinet faults.

[0003] When different working units of a power cabinet fail, the sounds they emit are significantly different. The use of a listening rod can help maintenance personnel initially diagnose the area where the power cabinet fails. By using the listening rod to concentrate on checking the working sounds of each unit, maintenance personnel can quickly determine whether the working unit of the power cabinet is operating normally. However, limited by the telescopic length of the listening rod and the controllable range of angle adjustment, only the working sounds on the surface of the power cabinet can be heard through the listening rod, and the working units deep inside the power cabinet cannot be specifically sound-collected. Moreover, since the power cabinet fault diagnosis work is a live operation, if maintenance personnel reach deep into the power cabinet to place the listening rod, there is a risk of serious electric shock due to accidental contact with the live leakage area, which affects the safe progress of power cabinet fault diagnosis. Summary of the Invention

[0004] In order to overcome the shortcomings that only the working sounds on the surface of the power cabinet can be heard through the listening rod due to the limited telescopic length of the listening rod and the controllable range of angle adjustment, and that serious electric shock is likely to occur during the process of maintenance personnel reaching deep into the power cabinet to place the listening rod, which affects the safe progress of power cabinet fault diagnosis, the present invention provides a power cabinet fault diagnosis device.

[0005] A power cabinet fault diagnosis device described in this text includes an insulating rod, a main reel, a main shaft, a rotating ring, a main driving wheel, a secondary reel, a secondary shaft, a secondary driving wheel, an insulating tube, a sound transmission mechanism, a magnetic attraction mechanism, and a sound insulation belt. The main reel is installed on the upper side of the insulating rod. The middle of the main reel is rotatably connected to the main shaft. The left end of the main shaft is fixedly connected to the rotating ring. The secondary reel is installed on the upper side of the insulating rod, and the secondary reel is located behind the main reel. The middle of the secondary reel is rotatably connected to the secondary shaft. The left side of the main shaft is fixedly connected to the main driving wheel. The left side of the secondary shaft is fixedly connected to the secondary driving wheel. A transmission belt is wound between the main driving wheel and the secondary driving wheel. The middle of the main shaft is wound with an insulating tube and a sound insulation belt, and the insulating tube and the sound insulation belt are stacked on top of each other. When the main shaft is rotated to release the rear end of the insulating tube from the rear side of the insulating rod, the rear end of the released sound insulation belt is wound on the secondary shaft. A sound transmission mechanism is connected inside the insulating tube. The sound transmission mechanism is connected to the main shaft. A magnetic attraction mechanism is connected inside the insulating tube. The magnetic attraction mechanism is connected to the main shaft. The magnetic attraction mechanism cooperates with the sound transmission mechanism to collect sound at the target position, and the magnetic attraction mechanism ejects the sound transmission mechanism in time when an electric shock phenomenon is detected.

[0006] Preferably, the sound insulation belt is set to a flat structure with the left and right sides bulging outwards and the middle concave, which is beneficial for the sound insulation belt to tightly wrap the insulating tube.

[0007] Preferably, the sound transmission mechanism includes a sound transmission tube, a sound collection bladder, a hollow cylinder, a sound listener, and an insulating sleeve.

[0008] The sound transmission tube is arranged inside the insulating tube. The rear end of the sound transmission tube is connected to the sound collection bladder. The middle of the main shaft is fixedly connected to the hollow cylinder. The front end of the sound transmission tube is connected to the hollow cylinder. The right side of the hollow cylinder is connected to the sound listener. A circle of insulating sleeve is sleeved outside the sound collection bladder. The insulating sleeve is connected to the magnetic attraction mechanism.

[0009] Preferably, a layer of sound insulation cotton is arranged between the insulating tube and the sound transmission tube.

[0010] Preferably, the sound collection bladder is set to a flat shape, and the upper side and the lower side of the sound collection bladder are respectively set to a plane structure.

[0011] Preferably, the magnetic attraction mechanism includes a permanent magnet, a first spring, and an electric reset component.

[0012] A permanent magnet is slidably connected to the left side and the right side of the insulating sleeve respectively, and the permanent magnet is located inside the insulating sleeve. A first spring is fixedly connected between each of the two permanent magnets and the insulating sleeve. A notch structure is respectively opened on the left side and the right side of the insulating sleeve at the rear side of the permanent magnet. An electric reset component is connected inside the insulating tube. The rear side of the electric reset component is connected to the two permanent magnets. The front side of the electric reset component is connected to the main shaft.

[0013] Preferably, the electric reset component includes a conductive rope, a conductive tube, a second spring, an electromagnet, an inner iron ring, a limiting rod, and an outer iron ring.

[0014] A conductive cord is fixedly connected to each of the left and right sides of the insulating tube; a permanent magnet is fixedly connected to each of the two conductive cords; a conductive tube is commonly electrically connected between the front ends of the two conductive cords; the conductive tube penetrates through the left end of the main shaft; a second spring is fixedly connected to the left end of the main shaft; an electromagnet is fixedly connected to the left end of the second spring; the left end of the conductive tube is electrically connected to the electromagnet; an inner iron ring is fixedly connected to the right side of the electromagnet; two limiting rods are fixedly connected to the right side of the inner iron ring; the two limiting rods are commonly inserted into the main shaft; an outer iron ring is fixedly connected to the left end of the main shaft; the right side of the outer iron ring is closely attached to the inner iron ring.

[0015] Preferably, two convex block structures are provided at the ends of the main shaft where the two limiting rods are inserted.

[0016] Preferably, a groove structure for accommodating the convex block is provided at the right end of the limiting rod; a clamping groove structure adapted to the convex block structure is provided on the left side of the limiting rod.

[0017] Preferably, an insulating shell is sleeved on the outer surface of the electromagnet.

[0018] A power cabinet fault diagnosis device described in this article includes an insulating tube and a sound insulation belt wound together in the middle of a main shaft. The insulating tube and the sound insulation belt are stacked on top of each other. A sound transmission mechanism is connected inside the insulating tube, so that the sound transmission mechanism in the wound state will not interfere with each other when conducting sound, reducing the noise in sound transmission. When the main shaft is rotated to release the rear end of the insulating tube downward from the rear side of the insulating rod, the rear end of the released sound insulation belt is wound on the auxiliary shaft. A magnetic attraction mechanism is also connected inside the insulating tube. With the cooperation of the magnetic attraction mechanism, the sound transmission mechanism accurately collects sound at the target position. In addition, when the magnetic attraction mechanism detects a leakage phenomenon, the magnetic attraction mechanism quickly ejects the sound transmission mechanism to remind the maintenance personnel to be careful of electric shock;

[0019] It solves the technical problems that, limited by the telescopic length and the controllable range of angle adjustment of the listening rod, only the working sound on the surface of the power cabinet can be heard through the listening rod, and serious electric shock is likely to occur during the process of the maintenance personnel deeply placing the listening rod, affecting the safe progress of the power cabinet fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a three-dimensional structure diagram of the present application described according to the embodiment;

[0021] Figure 2 FIG. is a first partial three-dimensional structure diagram of the present application described according to the embodiment;

[0022] Figure 3 FIG. is a second partial three-dimensional structure diagram of the present application described according to the embodiment;

[0023] Figure 4 FIG. is a sectional view of the insulating rod, the main winding drum and the auxiliary winding drum of the present application described according to the embodiment;

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the insulating tube and the sound insulation belt according to an embodiment of the present application;

[0025] Figure 6 Schematic diagram of the first partial three-dimensional structure of the sound transmission mechanism according to an embodiment of the present application;

[0026] Figure 7 Schematic diagram of the first partial three-dimensional structure of the magnetic attraction mechanism according to an embodiment of the present application;

[0027] Figure 8 Schematic diagram of the second partial three-dimensional structure of the sound transmission mechanism according to an embodiment of the present application;

[0028] Figure 9 Schematic diagram of the second partial three-dimensional structure of the magnetic attraction mechanism according to an embodiment of the present application;

[0029] Figure 10 Partial exploded view of the magnetic attraction mechanism according to an embodiment of the present application.

[0030] In the reference numerals: 1 - insulating rod, 2 - main reel, 21 - main shaft, 211 - convex block, 22 - rotating ring, 23 - main transmission wheel, 3 - auxiliary reel, 31 - auxiliary shaft, 32 - auxiliary transmission wheel, 4 - insulating tube, 41 - sound insulation cotton, 421 - sound transmission tube, 422 - sound receiving bladder, 423 - hollow cylinder, 424 - sound listener, 43 - insulating sleeve, 431 - notch, 51 - permanent magnet, 52 - first spring, 53 - conductive rope, 54 - conductive tube, 55 - second spring, 56 - electromagnet, 57 - inner iron ring, 58 - limiting rod, 581 - groove, 582 - clamping groove, 59 - outer iron ring, 6 - insulating shell, 7 - sound insulation belt. Detailed implementation manners

[0031] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which the presently preferred embodiments of the invention are shown. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and fully convey the scope of the invention to those skilled in the art.

[0032] Embodiment

[0033] A power cabinet fault diagnosis device, such as Figure 1 - Figure 10As shown in the figure, it includes an insulating rod 1, a main reel 2, a main shaft 21, a swivel 22, a main transmission wheel 23, a secondary reel 3, a secondary shaft 31, a secondary transmission wheel 32, an insulating tube 4, a sound transmission mechanism, a magnetic attraction mechanism, and a sound insulation belt 7; the main reel 2 is installed on the upper side of the insulating rod 1; the middle part of the main reel 2 is rotatably connected to the main shaft 21; the left end of the main shaft 21 is fixedly connected to the swivel 22; the insulating tube 4 is wound around the middle part of the main shaft 21; the rear end of the insulating tube 4 penetrates through the rear side of the insulating rod 1; the secondary reel 3 is installed on the upper side of the insulating rod 1, and the secondary reel 3 is located behind the main reel 2; the middle part of the secondary reel 3 is rotatably connected to the secondary shaft 31; the left side of the main shaft 21 is fixedly connected to the main transmission wheel 23; the left side of the secondary shaft 31 is fixedly connected to the secondary transmission wheel 32; a transmission belt is wound between the main transmission wheel 23 and the secondary transmission wheel 32; the sound insulation belt 7 is also wound around the middle part of the main shaft 21; the rear end of the sound insulation belt 7 is wound around the secondary shaft 31; the sound insulation belt 7 is set as a flat structure with the left and right sides bulging outwards and the middle part sunken; the sound transmission mechanism is connected inside the insulating tube 4; the sound transmission mechanism is connected to the main shaft 21; the magnetic attraction mechanism is connected inside the insulating tube 4; the magnetic attraction mechanism is connected to the main shaft 21; the sound transmission mechanism is connected to the magnetic attraction mechanism.

[0034] As Figure 1 , Figure 6 - Figure 9 As shown in the figure, the sound transmission mechanism includes a sound transmission tube 421, a sound receiving sac 422, a hollow cylinder 423, a sound listener 424, and an insulating sleeve 43; the sound transmission tube 421 is arranged inside the insulating tube 4; a layer of sound insulation cotton 41 is arranged between the insulating tube 4 and the sound transmission tube 421; the rear end of the sound transmission tube 421 is connected to the sound receiving sac 422; the sound receiving sac 422 is set as a flat shape, and the upper side and the lower side of the sound receiving sac 422 are respectively set as plane structures; the hollow cylinder 423 is fixedly connected to the middle part of the main shaft 21; the front end of the sound transmission tube 421 is connected to the hollow cylinder 423; the right side of the hollow cylinder 423 is connected to the sound listener 424; a circle of insulating sleeve 43 is sleeved outside the sound receiving sac 422; the insulating sleeve 43 is connected to the magnetic attraction mechanism.

[0035] As Figure 6 - Figure 10 As shown in the figure, the magnetic attraction mechanism includes a permanent magnet 51, a first spring 52, and an electric reset component; a permanent magnet 51 is slidably connected to the left side and the right side of the insulating sleeve 43 respectively, and the permanent magnet 51 is located inside the insulating sleeve 43; a first spring 52 is fixedly connected between each of the two permanent magnets 51 and the insulating sleeve 43; a notch 431 structure is respectively opened on the left side and the right side of the insulating sleeve 43 behind the permanent magnet 51; the electric reset component is connected inside the insulating tube 4; the rear side of the electric reset component is connected to the two permanent magnets 51; the front side of the electric reset component is connected to the main shaft 21.

[0036] As Figure 7 - Figure 10As shown in the figure, the electric reset component includes a conductive rope 53, a conductive tube 54, a second spring 55, an electromagnet 56, an inner iron ring 57, a limiting rod 58 and an outer iron ring 59; a conductive rope 53 is fixedly connected to each of the left and right sides of the insulating tube 4; a permanent magnet 51 is fixedly connected to each of the two conductive ropes 53; a conductive tube 54 is electrically connected between the front ends of the two conductive ropes 53; the conductive tube 54 penetrates through the left end of the main shaft 21; the left end of the main shaft 21 is fixedly connected with a second spring 55; the left end of the second spring 55 is fixedly connected with an electromagnet 56; the left end of the conductive tube 54 is electrically connected to the electromagnet 56; the right side of the electromagnet 56 is fixedly connected with an inner iron ring 57; two limiting rods 58 are fixedly connected to the right side of the inner iron ring 57; the two limiting rods 58 are jointly inserted into the main shaft 21; two bump 211 structures are arranged at the ends of the main shaft 21 where the two limiting rods 58 are inserted; a groove 581 structure for accommodating the bump 211 is formed at the right end of the limiting rod 58; a clamping groove 582 structure adapted to the bump 211 structure is formed at the left side of the limiting rod 58; the outer iron ring 59 is fixedly connected to the left end of the main shaft 21; the right side of the outer iron ring 59 is closely attached to the inner iron ring 57; an insulating shell 6 is sleeved on the outer surface of the electromagnet 56.

[0037] Sound transmission work of this power cabinet fault diagnosis device:

[0038] The maintenance personnel hold the insulating rod 1, with the rear end of the insulating rod 1 facing the target area to be listened to deep inside the power cabinet. The maintenance personnel slowly rotate the rotating ring 22 in the forward direction to drive the main shaft 21 to rotate. The main shaft 21 drives the insulating tube 4 and the sound insulation belt 7 to be released synchronously. The rear end of the insulating tube 4 drives the sound receiving bladder 422 to be released downward. The two permanent magnets 51 are accompanied on the left and right sides of the sound receiving bladder 422. At this time, the permanent magnets 51 are in a state of being received inside the insulating sleeve 43. At the same time, the main shaft 21 drives the main transmission wheel 23 to rotate. The main transmission wheel 23 drives the sub-transmission wheel 32 to rotate through the transmission belt. The sub-transmission wheel 32 drives the sub-shaft 31 to rotate. The sub-shaft 31 winds up the rear end of the released sound insulation belt 7 until the sound receiving bladder 422 reaches the target area, completing the release work of the sound receiving bladder 422.

[0039] After that, the maintenance personnel wear the sound receiver 424 on the ear. At the same time, the maintenance personnel press the insulating shell 6, driving the electromagnet 56 to push the second spring 55 to compress towards the main shaft 21. The electromagnet 56 drives the inner iron ring 57 away from the outer iron ring 59. At the same time, the electromagnet 56 pushes the limit rod 58 into the inside of the main shaft 21, making the convex block 211 leave the groove 581 and get stuck in the card slot 582 of the limit rod 58. At this time, the convex block 211 fixes the electromagnet 56 through the limit rod 58, so that the compressed second spring 55 will not push the electromagnet 56 to reset. At the same time, the first spring 52, which was initially in a stretched state, pulls the permanent magnet 51 out of the insulating sleeve 43 into the notch 431. The permanent magnet 51 loses the block of the insulating sleeve 43 and adsorbs on the iron sheet of the target area of the power cabinet through magnetic attraction, making the sound collection bag 422 close to the target area of the power cabinet for sound collection work. At this time, the maintenance personnel release the electromagnet 56, and the electromagnet 56 remains stationary under the clamping of the convex block 211.

[0040] After the sound collection bag 422 is close to the target area of the power cabinet, the sound in the target area of the power cabinet is continuously collected by the sound collection bag 422. The sound collection bag 422 transmits the collected sound to the ears of the maintenance personnel through the sound transmission pipe 421, the hollow cylinder 423 and the sound receiver 424 in sequence. The maintenance personnel judge whether the working unit in the target area of the power cabinet has a fault by distinguishing whether the sound in the target area of the power cabinet is normal, and complete the listening fault diagnosis work of the target area of the power cabinet.

[0041] If the maintenance personnel need to adjust the target area of sound collection in the power cabinet, they only need to rotate the rotating ring 22 in the reverse direction to drive the main shaft 21 to rotate. The main shaft 21 retracts the insulating pipe 4 upward. The insulating pipe 4 drives the sound collection bag 422 to slowly move upward along the iron sheet part of the power cabinet in contact. The target area of sound collection in the power cabinet is adjusted. At the same time, the main driving wheel 23 drives the auxiliary driving wheel 32 to rotate through the transmission belt. The auxiliary driving wheel 32 drives the auxiliary shaft 31 to rotate. The auxiliary shaft 31 slowly releases the rear end of the sound insulation belt 7, so that the sound insulation belt 7 is coiled on the main shaft 21 together with the retracted insulating pipe 4, and the retracted insulating pipe 4 is separated in time, realizing that the sound transmission pipe 421 in the state of being coiled with the insulating pipe 4 will not interfere with each other when conducting sound, and reducing the noise in sound transmission.

[0042] The leakage reminder work of this power cabinet fault diagnosis device:

[0043] The maintenance personnel operate the rotating ring 22 to adjust the sound collection of the sound receiving bag 422 that moves slowly upward along the iron sheet part of the power cabinet. During this process, when the permanent magnet 51 passes through the part where electric leakage occurs, the current passes through the permanent magnet 51, the conductive rope 53 and the conductive tube 54 in sequence to trigger the electromagnet 56. The electromagnet 56 generates an instantaneous electromagnetic suction force, so that the inner iron ring 57 on the electromagnet 56 is quickly adsorbed on the outer iron ring 59 under the instantaneous electromagnetic suction force. At the same time, the inner iron ring 57 drives the limiting rod 58 to be pulled out from the convex block 211, and the compressed second spring 55 pushes the electromagnet 56 to reset, so that the electromagnet 56 quickly pulls the conductive tube 54 and the conductive rope 53, driving the permanent magnet 51 to retract into the insulating sleeve 43. At the same time, the permanent magnet 51 drives the first spring 52 to stretch again. At this time, the permanent magnet 51 is retracted into the insulating sleeve 43 and no longer adsorbs the iron sheet part of the power cabinet through magnetic suction, realizing that the sound receiving bag 422 quickly bounces off the iron sheet part of the power cabinet with the permanent magnet 51, reminding the maintenance personnel to be careful of electric shock.

[0044] It should be understood that the above description is only for exemplary purposes and does not mean to limit the present invention. Those skilled in the art will understand that the variant forms of the present invention will be included within the scope of the claims herein.

Claims

1. A power cabinet fault diagnosis device, comprising: an insulating rod (1), a main reel (2), a main shaft (21) and a swivel ring (22); the main reel (2) is installed on the upper side of the insulating rod (1); the middle of the main reel (2) is rotationally connected to the main shaft (21); the left end of the main shaft (21) is fixedly connected to the swivel ring (22); It is characterized in that further comprising: a main transmission wheel (23), a secondary reel (3), a secondary shaft (31), a secondary transmission wheel (32), an insulating tube (4), a sound transmission mechanism, a magnetic attraction mechanism and a sound insulation belt (7); the secondary reel (3) is installed on the upper side of the insulating rod (1), and the secondary reel (3) is located behind the main reel (2); the middle of the secondary reel (3) is rotationally connected to the secondary shaft (31); the main transmission wheel (23) is fixedly connected to the left side of the main shaft (21); the secondary transmission wheel (32) is fixedly connected to the left side of the secondary shaft (31); a transmission belt is wound between the main transmission wheel (23) and the secondary transmission wheel (32); the insulating tube (4) and the sound insulation belt (7) are wound around the middle of the main shaft (21), and the insulating tube (4) and the sound insulation belt (7) are stacked on each other; when the rear end of the insulating tube (4) is released from the rear side of the insulating rod (1) by rotating the main shaft (21), the rear end of the released sound insulation belt (7) is wound on the secondary shaft (31); a sound transmission mechanism is connected inside the insulating tube (4); the sound transmission mechanism is connected to the main shaft (21); a magnetic attraction mechanism is connected inside the insulating tube (4); the magnetic attraction mechanism is connected to the main shaft (21); the magnetic attraction mechanism cooperates with the sound transmission mechanism to collect sound at the target position, and the magnetic attraction mechanism ejects the sound transmission mechanism in time when an electric shock phenomenon is recognized; the magnetic attraction mechanism includes: a permanent magnet (51) is slidably connected to the left side and the right side of the insulating sleeve (43), and the permanent magnet (51) is located inside the insulating sleeve (43); a first spring (52) is fixedly connected between each of the two permanent magnets (51) and the insulating sleeve (43); a notch (431) structure is formed on the left side and the right side of the insulating sleeve (43) behind the permanent magnet (51); an electric reset component is connected inside the insulating tube (4); the rear side of the electric reset component is connected to the two permanent magnets (51); the front side of the electric reset component is connected to the main shaft (21); the electric reset component includes: a conductive rope (53) is fixedly connected to the left side and the right side of the insulating tube (4); each of the two conductive ropes (53) is fixedly connected to a permanent magnet (51); the front ends of the two conductive ropes (53) are commonly electrically connected to a conductive tube (54); the conductive tube (54) penetrates through the left end of the main shaft (21); a second spring (55) is fixedly connected to the left end of the main shaft (21); an electromagnet (56) is fixedly connected to the left end of the second spring (55); the left end of the conductive tube (54) is electrically connected to the electromagnet (56); an inner iron ring (57) is fixedly connected to the right side of the electromagnet (56); two limiting rods (58) are fixedly connected to the right side of the inner iron ring (57); the two limiting rods (58) are commonly inserted into the main shaft (21); an outer iron ring (59) is fixedly connected to the left end of the main shaft (21); the right side of the outer iron ring (59) is closely attached to the inner iron ring (57).

2. The power cabinet fault diagnosis device according to claim 1, characterized in that, The sound insulation belt (7) is set to have a flat structure with both left and right sides bulging outwards and the middle part sunken, which is beneficial for the sound insulation belt (7) to tightly wrap the insulating pipe (4).

3. The power cabinet fault diagnosis device according to claim 1, characterized in that, The sound transmission mechanism includes a sound transmission pipe (421), a sound receiving bladder (422), a hollow cylinder (423), a sound listener (424) and an insulating sleeve (43); The sound transmission pipe (421) is arranged inside the insulating pipe (4); the rear end of the sound transmission pipe (421) is connected to the sound receiving bladder (422); a hollow cylinder (423) is fixedly connected to the middle part of the main shaft (21); the front end of the sound transmission pipe (421) is connected to the hollow cylinder (423); the sound listener (424) is connected to the right side of the hollow cylinder (423); a circle of insulating sleeve (43) is sleeved outside the sound receiving bladder (422); the insulating sleeve (43) is connected to the magnetic attraction mechanism.

4. The power cabinet fault diagnosis device according to claim 3, characterized in that, A layer of sound insulation cotton (41) is arranged between the insulating pipe (4) and the sound transmission pipe (421).

5. The power cabinet fault diagnosis device according to claim 3, characterized in that, The sound receiving bladder (422) is set to be flat, and the upper side and the lower side of the sound receiving bladder (422) are respectively set to be flat structures.

6. The power cabinet fault diagnosis device according to claim 1, characterized in that, Two convex blocks (211) are arranged at the ends of the two limiting rods (58) inserted into the main shaft (21).

7. An electric cabinet fault diagnosis device according to claim 6, characterized in that, A groove (581) for accommodating the convex block (211) is arranged at the right end of the limiting rod (58); a clamping groove (582) adapted to the convex block (211) structure is arranged on the left side of the limiting rod (58).

8. An electric cabinet fault diagnosis device according to claim 1, characterized in that, An insulating shell (6) is sleeved on the outer surface of the electromagnet (56).

Images