Power equipment partial discharge detection device

Abstract

The application discloses a kind of electric power equipment partial discharge detection devices, belongs to partial discharge detection technical field.A kind of electric power equipment partial discharge detection device, including the acoustic emission sensor for detecting partial discharge sound wave, the acoustic emission sensor is installed on the surface of walking trolley by mechanical arm, the acoustic emission sensor is fixed in loudspeaker cover inside, the loudspeaker cover is fixed in the end of mechanical arm by fixed rod, the loudspeaker cover inside is provided with the marking ring for marking detection position, the marking ring is opened with multiple marking ports towards the side of loudspeaker cover opening;The application can detect the partial discharge condition inside equipment by setting acoustic emission sensor in the end of mechanical arm, by setting loudspeaker cover, so that loudspeaker cover is attached to the surface of equipment, can reduce the interference of other sound waves in environment, improve the intensity and signal-to-noise ratio of partial discharge sound wave signal collected by acoustic emission sensor, and the positioning judgment of partial discharge position is more accurate.

Description

Technical Field

[0001] This invention relates to the field of partial discharge detection technology, and in particular to a partial discharge detection device for power equipment. Background Technology

[0002] Partial discharge is a major precursor to insulation degradation in high-voltage electrical equipment. Effective detection and localization of partial discharge are crucial for ensuring the safe and stable operation of power systems. Gas-insulated metal-enclosed switchgear (GIS) is widely used in substations due to its compact structure and high operational reliability; however, its fully enclosed metal casing also presents challenges for detecting internal insulation defects.

[0003] In existing technologies, the typical detection scheme for partial discharge of power equipment is as follows: the power equipment within a substation is divided into several monitoring zones, and fixed ultrasonic and magnetic field detection devices are deployed in each zone to achieve real-time monitoring of partial discharge signals in the area. When the fixed monitoring device detects a discharge phenomenon, the system sends a task command to an inspection robot, which then goes to the target area for re-inspection and confirmation to locate the approximate range of the discharge source.

[0004] However, this solution still has the following technical shortcomings in practical applications: First, the ultrasonic signals generated by partial discharge inside GIS equipment need to penetrate the metal casing to be received by external sensors, and the signal attenuates significantly during propagation. Simultaneously, various interference sources exist at the substation site, including transient mechanical vibrations from switchgear operation, continuous power frequency vibrations from transformer and reactor operation, and broadband noise from cooling system fans. These background noises overlap with the ultrasonic signals generated by partial discharge in the same frequency band, resulting in a low signal-to-noise ratio when the inspection robot performs precise inspections close to the GIS casing. Weak discharge signals are easily drowned out by noise, leading to increased positioning errors or even missed detections.

[0005] Second, in the existing technology, robots cannot mark the detected discharge locations. After verification, they only report the approximate location information of the partial discharge area (such as a certain interval or a certain gas chamber) to the control center, rather than the precise coordinates of the discharge source. After the maintenance personnel arrive at the site based on this information, they still need to carry independent detection instruments to conduct a thorough search of the area again and repeatedly measure to find the exact location of the discharge source.

[0006] Therefore, this application proposes a partial discharge detection device for power equipment that improves the accuracy of location confirmation and facilitates the marking of discharge locations. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art by proposing a partial discharge detection device for power equipment.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A partial discharge detection device for power equipment includes an acoustic emission sensor for detecting acoustic waves of partial discharge. The acoustic emission sensor is mounted on the surface of a traveling trolley via a robotic arm. The acoustic emission sensor is fixed inside a horn cover. The horn cover is fixed to the end of the robotic arm via a fixing rod. A marking ring for marking the detection position is provided inside the horn cover. The marking ring has multiple marking holes on the side facing the opening of the horn cover.

[0009] In some embodiments, the horn cover is square-pyramidal, and a sealing ring is fixed to the side of the horn cover away from the robotic arm.

[0010] In some embodiments, notches are provided on both sides of the speaker cover, and adjustment plates that cover the notches are slidably provided on both sides of the speaker cover, with one side of the adjustment plate fixed to the surface of the sealing ring.

[0011] In some embodiments, baffles are provided around the horn cover, and the baffles abut against the surface of the sealing ring to cause the sealing ring to expand in the opposite direction away from the robotic arm.

[0012] In some embodiments, the marking ring slides inside the horn cover via a plurality of first guide rods, and the end of the first guide rod away from the marking ring slides on the surface of the fixed rod via a movable plate, and a telescopic cover is fixed between the movable plate and the horn cover.

[0013] In some embodiments, a plug slides inside the marking port, a spring is fixed to the inner end of the plug, and a plurality of conveying grooves are formed on the surface of the plug, the conveying grooves being arranged along the axial direction of the plug.

[0014] In some embodiments, the surface of the marking ring is provided with a cleaning block for cleaning residual paint in the conveying trough, and the end of the cleaning block is provided with a cleaning plate for inserting into the conveying trough. There are multiple cleaning blocks, which are arranged in a circle around the plug.

[0015] In some embodiments, the cleaning block is hinged to the surface of the marking ring, and an elastic plate is fixed to the side of the cleaning block facing the marking opening, the elastic plate abutting against the side of the marking opening.

[0016] In some embodiments, the cleaning plate is inserted into the delivery groove via a pressing assembly, the pressing assembly including a pressure ring that slides on the surface of a marking ring via two second guide rods and an inclined surface disposed on the surface of the cleaning block, the inclined surface cooperating with the pressure ring.

[0017] In some embodiments, the plug presses against the pressure ring via a push rod, the push rod being fixed to the outer end of the plug.

[0018] Compared with the prior art, the present invention provides a partial discharge detection device for power equipment, which has the following beneficial effects.

[0019] 1. This invention, by setting an acoustic emission sensor at the end of a robotic arm, can detect the partial discharge condition inside the equipment. By setting a horn cover and attaching it to the surface of the equipment, interference from other sound waves in the environment can be reduced, thereby improving the intensity and signal-to-noise ratio of the partial discharge sound wave signal collected by the acoustic emission sensor, and making the location judgment of the partial discharge more accurate.

[0020] 2. In this invention, by setting a marking ring, after the acoustic emission sensor accurately confirms the location of the partial discharge, the robotic arm moves the horn cover toward the detection location, so that the marking ring comes into contact with the equipment surface, leaving a clear marking mark on the equipment surface. After maintenance personnel arrive at the area, they can quickly find the location of the partial discharge through the marking and carry out maintenance.

[0021] 3. In this invention, by setting a cleaning block, when the plug enters the marking ring, the cleaning plate of the cleaning block will be inserted into the conveying groove to scrape off the residual paint attached to the inner wall of the conveying groove, so as to avoid the dried paint from clogging the conveying groove, ensure that the conveying groove is always unobstructed, improve the reliability of the device, reduce the frequency of manual dredging and cleaning, and reduce maintenance costs.

[0022] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the present invention.

[0024] Figure 2 This is a partial structural diagram of the present invention.

[0025] Figure 3 This is a cross-sectional structural diagram of the speaker cover in this invention.

[0026] Figure 4 This is a schematic diagram of the sealing ring structure in this invention.

[0027] Figure 5 This is a cross-sectional structural diagram of the telescopic cover in this invention.

[0028] Figure 6 This is a schematic diagram of the marking ring in use in this invention.

[0029] Figure 7 This is a schematic diagram of the marking ring structure in this invention.

[0030] Figure 8 This is a schematic diagram of the plug structure in this invention.

[0031] Figure 9 This is a schematic diagram of the usage state structure of the cleaning block in this invention.

[0032] Figure 10 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0033] In the picture: 1. Walking trolley; 101. Partial discharge sensor; 102. Camera; 2. Robotic arm; 3. Acoustic emission sensor; 301. Speaker cover; 302. Fixing rod; 4. Sealing ring; 401. Adjusting plate; 402. Sliding rod; 403. Baffle; 404. Air pump; 405. Electrically controlled three-way valve; 5. Marking ring; 501. First guide rod; 502. Moving plate; 503. Telescopic cover; 504. Storage box; 6. Marking port; 601. Plug; 602. Conveying trough; 7. Cleaning block; 701. Cleaning plate; 8. Pressing assembly; 801. Pressure ring; 802. Second guide rod; 803. Inclined surface; 804. Top rod. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1-10 A partial discharge detection device for power equipment includes an acoustic emission sensor 3 for detecting acoustic waves of partial discharge. The acoustic emission sensor 3 is mounted on the surface of a traveling trolley 1 via a robotic arm 2 and is located at the end of the robotic arm 2. The acoustic emission sensor 3 is a sensor array with a built-in beamforming algorithm, which is existing technology and therefore will not be described in detail. The top of the walking vehicle 1 is equipped with a partial discharge sensor 101 and a camera 102. The partial discharge sensor 101 has a three-in-one detection function of ultra-high frequency, ground wave and ultrasonic detection. The acoustic emission sensor 3 is fixed inside the horn cover 301, and the horn cover 301 is fixed to the end of the robotic arm 2 by a fixing rod 302.

[0036] Understandably, the mobile trolley 1 can move the entire device around the power equipment, and the partial discharge sensor 101 detects partial discharge signals. When the fixed ultrasonic detection device and magnetic field detection device detect partial discharge signals in the area, they notify the mobile trolley 1 to enter the area to further confirm the partial discharge signal. When the partial discharge sensor 101 detects the partial discharge signal for the second time, it sends a confirmation signal to the control terminal. However, for partial discharge inside the equipment, due to the influence of the equipment casing and the surrounding environment, it is impossible to accurately confirm the partial discharge. Therefore, when the partial discharge location is inside the equipment, after the partial discharge sensor 101 detects a preliminary suspected partial discharge signal, the control terminal will control the robotic arm 2 to adjust its position, driving the acoustic emission sensor 3 array to approach the surface of the power equipment to further confirm the suspected partial discharge signal generated inside the equipment and further detect the location of the partial discharge. By setting up a horn cover 301, when detecting acoustic signals inside the equipment, the horn cover 301 is attached to the surface of the equipment. The horn cover 301 can concentrate the acoustic signal, reduce interference from other acoustic waves in the environment, improve the intensity and signal-to-noise ratio of the partial discharge acoustic signal collected by the acoustic emission sensor 3, and prevent noise from masking the effective signal, making the subsequent location judgment of the partial discharge more accurate. The acoustic emission sensor 3 and the built-in beamforming algorithm can process the collected acoustic signal, further focus the signal emitted from the target location, filter out interference noise from non-target areas, and finally combine signal analysis to accurately locate the specific location of the partial discharge inside the equipment. With the three-in-one partial discharge sensor 101, layered detection from coarse positioning to precise positioning can be achieved, which can not only improve detection efficiency, but also ensure the accuracy of partial discharge detection, making it convenient for staff to locate the fault location for maintenance in a timely manner.

[0037] Specifically, the horn cover 301 is square-pyramidal, and a sealing ring 4 is fixed on the side of the horn cover 301 away from the robotic arm 2.

[0038] Understandably, by setting a sealing ring 4 on the horn cover 301, when the horn cover 301 is in close contact with the equipment surface, the sealing ring 4 can form effective contact with the equipment, which can significantly reduce the direct impact and interference caused by the vibration generated by the equipment during operation on the horn cover 301, thereby effectively improving the stability and detection accuracy of the signal collected by the acoustic emission sensor 3. At the same time, the presence of the sealing ring 4 can also ensure that no unnecessary gaps are generated between the horn cover 301 and the contact surface of the equipment. This not only helps to maintain a stable coupling state, but also effectively blocks the intrusion of external environmental noise, further ensuring the accuracy and reliability of the detection data.

[0039] Specifically, notches are provided on both sides of the horn cover 301. Adjustment plates 401 that cover the notches slide on both sides of the horn cover 301. The adjustment plates 401 slide on the inside of the horn cover 301 via two sliding rods 402. The sliding rods 402 are located inside the horn cover 301. One side of the adjustment plate 401 is fixed to the surface of the sealing ring 4. The sealing ring 4 is a rubber airbag. The sealing ring 4 is inflated by an air pump 404. The air pump 404 is fixed to one side of the robotic arm 2. The air outlet of the air pump 404 is connected to an electrically controlled three-way valve 405 via a hose. One of the air outlets of the electrically controlled three-way valve 405 is connected to the sealing ring 4 via a hose.

[0040] Baffles 403 are provided around the horn cover 301. The baffles 403 are obliquely arranged and abut against the surface of the sealing ring 4 to cause the sealing ring 4 to expand away from the robotic arm 2. Two baffles 403 are fixed to the surface of the horn cover 301, and the other two baffles 403 are fixed to the surface of the two adjusting plates 401.

[0041] Understandably, by setting the sealing ring 4 as a rubber airbag, when the surfaces of electrical equipment with different shapes need to be inspected, the air pump 404 can inflate the sealing ring 4. At the same time, during the inflation process, due to the limiting and blocking of the surrounding baffles 403, the rubber sealing ring 4 will bulge outward to adapt to the concave and convex contours of different equipment surfaces, automatically fill the gap between the sealing ring 4 and the equipment surface, and further enhance the effect of isolating external noise and buffering equipment vibration. When encountering cylindrical equipment (such as GIS), the horn cover 301 abuts against the equipment surface, and the protruding part of the cylinder contacts the adjusting plate 401. The resulting reaction force causes the adjusting plate 401 to contract, forming a concave arc shape on both sides of the horn cover 301. In conjunction with the sealing ring 4, the horn cover 301 can fit snugly against the cylindrical equipment, thus improving the adaptability to power equipment of different shapes. After the horn cover 301 moves away from the equipment, the elasticity of the sealing ring 4 itself drives the two adjusting plates 401 to automatically reset.

[0042] Specifically, the inside of the horn cover 301 is provided with a marking ring 5 for marking the detection position. The marking ring 5 is square and has a hollow structure inside. Multiple marking holes 6 are opened on the side of the marking ring 5 facing the opening of the horn cover 301. The multiple marking holes 6 are evenly distributed along the marking ring 5. The marking ring 5 slides inside the horn cover 301 via multiple first guide rods 501. A movable plate 502 is fixed to one end of the first guide rod 501 away from the marking ring 5. The movable plate 502 slides on the surface of the fixed rod 302. A telescopic cover 503 is fixed between the movable plate 502 and the horn cover 301. The two ends of the telescopic cover 503 are respectively fixed to the surface of the movable plate 502 and the surface of the horn cover 301. The surface of the telescopic cover 503 is connected to another outlet of the electrically controlled three-way valve 405 via a flexible hose. A storage box 504 is fixed on the other side of the robotic arm 2. The storage box 504 is connected to the water pump. The water pump outlet is connected to the marking ring 5 through a connecting pipe. The middle part of the connecting pipe is fixed to the surface of the moving plate 502.

[0043] Understandably, once the acoustic emission sensor 3 accurately confirms the location of the partial discharge, the robotic arm 2 directs the horn cover 301 toward the detection location. The air pump 404 is connected to the telescopic cover 503 via the electrically controlled three-way valve 405, drawing out the gas inside the telescopic cover 503. The resulting negative pressure causes the telescopic cover 503 to contract, pulling the moving plate 502 and the first guide rod 501 to move the marking ring 5 out of the horn cover 301's range, so that the marking ring 5 contacts the equipment surface. At this time, the water pump starts, injecting the marking paint from the storage tank 504 into the marking ring 5 through the connecting pipe. The paint flows out from multiple marking ports 6 of the marking ring 5, leaving clear marking marks on the equipment surface. When maintenance personnel arrive at the area, they can quickly locate the partial discharge location through the markings for maintenance. After marking is completed, air is injected into the telescopic cover 503 by the air pump 404, so that the telescopic cover 503 pushes the moving plate 502 to slide, so that the marking ring 5 retracts into the inside of the horn cover 301, avoiding unnecessary interference caused by the marking ring 5; By fixing the middle part of the connecting tube to the surface of the moving plate 502, and the distance between the moving plate 502 and the marking ring 5 is a fixed distance, the connecting tube can smoothly enter and exit the horn cover 301, avoiding bending of the connecting tube.

[0044] Specifically, a plug 601 slides inside the marking port 6, and a spring is fixed at the inner end of the plug 601. The other end of the spring abuts against the inner wall of the marking ring 5. Multiple conveying grooves 602 are opened on the surface of the plug 601, and the conveying grooves 602 are arranged along the axial direction of the plug 601.

[0045] Understandably, to prevent the marking pigment inside the marking ring 5 from leaking into the horn cover 301 through the marking port 6, the spring normally pushes the plug 601 to seal the marking port 6, preventing the marking pigment from flowing out normally. When the marking ring 5 touches the surface of the power equipment, the equipment surface pushes the plug 601 in the opposite direction, compressing the spring and causing the plug 601 to retract into the marking ring 5. At this time, the conveying groove 602 on the surface of the plug 601 connects with the inside of the marking ring 5, allowing the paint inside the marking ring 5 to flow out through the conveying groove 602 from the marking port 6, completing the marking operation. After marking is completed, the marking ring 5 leaves the equipment surface, the plug 601 loses the external pressure, and the spring can push the plug 601 out again to seal the marking port 6, stopping the paint from flowing out and effectively preventing paint leakage and waste, as well as contamination of the inside of the horn cover 301.

[0046] Specifically, the surface of the marking ring 5 is provided with a cleaning block 7 for cleaning residual paint in the conveying trough 602. The end of the cleaning block 7 is provided with a cleaning plate 701 for inserting into the conveying trough 602. There are multiple cleaning blocks 7, which are arranged in a circle around the plug 601. The multiple cleaning blocks 7 correspond to multiple conveying troughs 602 respectively.

[0047] Understandably, since the marking ring 5 is only used for marking when partial discharge occurs, its usage frequency is low. Furthermore, the paint residue inside the conveying trough 602 is prone to drying and hardening after prolonged standing, clogging the trough and preventing the paint from flowing out properly during subsequent use, thus affecting the smooth progress of the marking operation. Therefore, a cleaning block 7 is installed. When the plug 601 enters the marking ring 5, the cleaning plate 701 of the cleaning block 7 will correspondingly insert into the conveying trough 602 to scrape off the residual paint adhering to the inner wall of the conveying trough 602, preventing the dried paint from clogging the trough and ensuring that the conveying trough 602 remains unobstructed. This improves the reliability of the device, reduces the frequency of manual cleaning, and lowers maintenance costs.

[0048] Specifically, the cleaning block 7 is hinged to the surface of the marking ring 5, and an elastic plate is fixed to the side of the cleaning block 7 facing the marking opening 6. The elastic plate abuts against the side of the marking opening 6, and a gap is provided between the cleaning plate 701 and the marking opening 6.

[0049] Understandably, by setting up an elastic plate, in the normal state, the cleaning block 7 is rotated, causing the cleaning plate 701 to disengage from the conveying trough 602, allowing the plug 601 to slide smoothly out of the marking port 6. When marking is required, the cleaning plate 701 is inserted into the conveying trough 602, and the plug 601 slides into the marking ring 5. During this process, the dried residual paint attached to the conveying trough 602 can be scraped off, preventing the conveying trough 602 from becoming blocked. At the same time, by cleaning the conveying trough 602 when the plug 601 slides into the marking ring 5, the dried paint is cleaned to the side away from the marking port 6, preventing the cleaned dried paint from entering the marking ring 5 through the conveying trough 602.

[0050] Specifically, the cleaning plate 701 is inserted into the conveying groove 602 through the pressing assembly 8. The pressing assembly 8 includes a pressure ring 801 that slides on the surface of the marking ring 5 through two second guide rods 802 and an inclined surface 803 set on the surface of the cleaning block 7. The inclined surface 803 cooperates with the pressure ring 801. The second guide rod 802 is fixed on the surface of the marking ring 5. The pressure ring 801 slides on the surface of the second guide rod 802. A spring is sleeved on the surface of the second guide rod 802 to drive the pressure ring 801 away from the cleaning block 7. The plug 601 presses the pressure ring 801 through the push rod 804. The push rod 804 is fixed on the outer end of the plug 601. The push rod 804 is L-shaped, and the other end of the push rod 804 abuts against the surface of the pressure ring 801. The surface of the plug 601 is stepped, and the outer diameter is smaller than the inner diameter.

[0051] Understandably, by setting up the pressing component 8, when the plug 601 slides into the marking ring 5, the push rod 804 presses the pressure ring 801, so that the pressure ring 801, in cooperation with the inclined surface 803, pushes the pressure plate into the conveying groove 602, thereby automatically completing the insertion action of the cleaning plate 701; since there is a gap between the cleaning plate 701 and the marking port 6, and the outer diameter of the plug 601 is smaller than the inner diameter, the paint can penetrate from the gap between the gap and the cleaning plate 701 to the outer end of the plug 601 to achieve marking, thus avoiding the cleaning plate 701 from affecting the conveying of the paint; After the plug 601 is removed, the spring drives the pressure ring 801 to reset, no longer applying a pushing force to the cleaning block 7. After the cleaning block 7 loses its force, the elastic plate drives the cleaning block 7 to reset, causing the cleaning plate 701 to disengage from the conveying trough 602. The entire cleaning process is completed synchronously with the sliding of the plug 601, realizing that the conveying trough 602 is cleaned synchronously during each marking operation, avoiding the long-term accumulation and drying of residual paint, and ensuring the long-term unobstructed flow of the conveying trough 602.

[0052] In this invention, a trolley 1 can move the entire device around the power equipment, and a partial discharge sensor 101 detects partial discharge signals. When a fixed ultrasonic detection device and magnetic field detection device detect a partial discharge signal in the area, the trolley 1 enters the area to further confirm the partial discharge signal. When the partial discharge sensor 101 detects a partial discharge signal for the second time, a confirmation signal is sent to the control terminal. When the partial discharge location is inside the equipment, the robotic arm 2 moves the acoustic emission sensor 3 to adjust its position and detect the partial discharge signal generated inside the equipment, further detecting the location of the partial discharge. The robotic arm 2 attaches a horn cover 301 to the surface of the equipment. The horn cover 301, acoustic emission sensor 3, and beamforming algorithm process the collected sound wave signals to further focus the signal emitted from the target location, filter out interference noise from non-target areas, and finally combine signal analysis to accurately locate the specific location of the partial discharge inside the equipment. When the horn cover 301 touches the surface of the equipment, the air pump 404 inflates the sealing ring 4, automatically filling the gap between the sealing ring 4 and the equipment surface, further strengthening the sealing signal. The system effectively isolates external noise and buffers equipment vibration. Once the acoustic emission sensor 3 accurately identifies the location of the partial discharge, the robotic arm 2 orients the speaker cover 301 toward the detection position. Through the cooperation of the air pump 404 and the telescopic cover 503, the moving plate 502 and the first guide rod 501 are pulled, causing the marking ring 5 to move out of the speaker cover 301 and into contact with the equipment surface. Paint flows from the multiple marking ports 6 of the marking ring 5, leaving clear markings on the equipment surface. When maintenance personnel arrive in the area, they can quickly locate the partial discharge using these markings. The location of the electrical components is inspected; by setting up the cleaning block 7, before marking, the cleaning plate 701 is inserted into the conveying groove 602, and the plug 601 slides into the marking ring 5. During this process, the dried residual paint attached to the conveying groove 602 can be scraped off to prevent the conveying groove 602 from being blocked. At the same time, the conveying groove 602 is cleaned by the plug 601 sliding into the marking ring 5, thereby cleaning the dried paint to the side away from the marking opening 6, preventing the dried paint that has been cleaned off from entering the marking ring 5 through the conveying groove 602 and causing the marking opening 6 to be blocked.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A partial discharge detection device for power equipment, characterized in that, The device includes an acoustic emission sensor (3) for detecting partial discharge sound waves. The acoustic emission sensor (3) is mounted on the surface of the walking trolley (1) by a robotic arm (2). The acoustic emission sensor (3) is fixed inside a horn cover (301). The horn cover (301) is fixed to the end of the robotic arm (2) by a fixing rod (302). A marking ring (5) for marking the detection position is provided inside the horn cover (301). The marking ring (5) has multiple marking holes (6) on the side facing the opening of the horn cover (301).

2. The partial discharge detection device for power equipment according to claim 1, characterized in that, The horn cover (301) is square-pyramidal, and a sealing ring (4) is fixed on the side of the horn cover (301) away from the robotic arm (2).

3. The partial discharge detection device for power equipment according to claim 1, characterized in that, The speaker cover (301) has notches on both sides, and the speaker cover (301) has adjustable plates (401) that slide on both sides to cover the notches. One side of the adjustable plate (401) is fixed to the surface of the sealing ring (4).

4. The partial discharge detection device for power equipment according to claim 2, characterized in that, The speaker cover (301) is provided with baffles (403) around its perimeter. The baffles (403) abut against the surface of the sealing ring (4) to cause the sealing ring (4) to expand in the opposite direction away from the robotic arm (2).

5. The partial discharge detection device for power equipment according to claim 1, characterized in that, The marking ring (5) slides inside the horn cover (301) via multiple first guide rods (501). The end of the first guide rod (501) away from the marking ring (5) slides on the surface of the fixed rod (302) via a moving plate (502). A telescopic cover (503) is fixed between the moving plate (502) and the horn cover (301).

6. The partial discharge detection device for power equipment according to claim 1, characterized in that, A plug (601) slides inside the marking port (6). A spring is fixed at the inner end of the plug (601). Multiple conveying grooves (602) are opened on the surface of the plug (601). The conveying grooves (602) are arranged along the axial direction of the plug (601).

7. The partial discharge detection device for power equipment according to claim 1, characterized in that, The surface of the marking ring (5) is provided with a cleaning block (7) for cleaning residual paint in the conveying trough (602). The end of the cleaning block (7) is provided with a cleaning plate (701) for inserting into the conveying trough (602). There are multiple cleaning blocks (7), which are arranged in a circle around the plug (601).

8. A partial discharge detection device for power equipment according to claim 7, characterized in that, The cleaning block (7) is hinged to the surface of the marking ring (5), and an elastic plate is fixed to the side of the cleaning block (7) facing the marking opening (6), with the elastic plate abutting against the side of the marking opening (6).

9. A partial discharge detection device for power equipment according to claim 7, characterized in that, The cleaning plate (701) is inserted into the conveying groove (602) by a pressing assembly (8). The pressing assembly (8) includes a pressure ring (801) that slides on the surface of the marking ring (5) via two second guide rods (802) and an inclined surface (803) provided on the surface of the cleaning block (7). The inclined surface (803) cooperates with the pressure ring (801).

10. A partial discharge detection device for power equipment according to claim 9, characterized in that, The plug (601) presses the pressure ring (801) by a push rod (804), which is fixed to the outer end of the plug (601).

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