Coordinated unwrapping and locating device and method for high frequency near field partial discharge detection

Abstract

The application discloses a kind of for high frequency near field partial discharge detection collaborative development and positioning device and method, it is related to electric power equipment detection technical field.The device includes protective shell, electric push rod, sliding block, sliding frame, guide rod, openwork plate, rotating plate, baffle and lifting assembly, sliding block is driven by electric push rod, linkage lifting assembly and openwork plate, realize the orderly development and state switching between detection probe in working condition and non-working state.Meanwhile, mechanical self-locking mechanism is provided to prevent the accidental sliding of electric detection device body, and the locking assembly based on the radial expansion of sliding ball is used to realize its quick replacement.The method is based on the above device, realizes the automatic positioning, signal acquisition and retraction of electric detection device body.The application solves the problem that detection probe development and positioning are difficult to cooperate in the existing high frequency near field partial discharge detection process, and the stability of detection posture is insufficient, improves the reliability and on-site use safety of detection process.

Description

Technical Field

[0001] This invention relates to the field of power equipment testing technology, specifically to a collaborative deployment and positioning device and method for high-frequency near-field partial discharge detection. Background Technology

[0002] During long-term operation, the insulation structure of electrical equipment is prone to partial discharge due to aging, moisture, or local defects. Partial discharge is an important characteristic reflecting the insulation condition of electrical equipment, and timely partial discharge detection is of great significance for preventing equipment failure and ensuring the safe operation of the power system.

[0003] Among existing partial discharge detection technologies, detection methods based on high-frequency near-field sensors are widely used in on-site inspections due to their advantages such as no power outages and strong anti-interference capabilities. This type of detection typically requires placing the sensor in the near-field region close to the surface of the device under test to acquire the high-frequency electromagnetic signals generated by partial discharge.

[0004] However, high-frequency near-field partial discharge detection places high demands on the sensor's detection distance, detection posture, and the stability of the detection process. In practical applications, existing portable detection devices mostly rely on manual methods to unfold and position the detection probe. The unfolding, retraction, and protection processes of the detection probe are relatively independent of the detection action, making it difficult to maintain a suitable working state for high-frequency near-field detection during frequent movements and rapid detection, which can easily affect the stability of the detection results and the safety of equipment use.

[0005] Therefore, it is necessary to provide a detection device and method that can coordinate the deployment, positioning, and storage process of the detection probe to meet the needs of high-frequency near-field partial discharge detection, so as to improve the reliability of partial discharge detection and the convenience of field use. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a collaborative deployment and positioning device and method for high-frequency near-field partial discharge detection. By collaboratively designing the deployment and positioning process of the high-frequency near-field sensor in the detection device, and taking into account the state switching in the non-detection state, the device can stably maintain a working state suitable for high-frequency near-field detection during the detection process, thereby improving the reliability of partial discharge detection and the convenience of field use.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A collaborative deployment and positioning device for high-frequency near-field partial discharge detection includes a protective shell and an electrical detection device body. An electric push rod is fixedly connected inside the protective shell. A sliding block is fixedly connected to the output end of the electric push rod. A sliding frame is slidably connected inside the sliding block. A guide rod is fixedly connected inside the protective shell. The guide rod is slidably connected to the inside of the sliding frame. A perforated plate is fixedly connected to the top of the sliding frame. A rotating plate is slidably connected inside the perforated plate. Both ends of the rotating plate are rotatably connected to the inside of the protective shell. A baffle is fixedly connected to the outside of the rotating plate.

[0009] The top of the sliding block is provided with a lifting component for directly lifting the body of the electrical detection device; the movement of the lifting component and the movement of the hollow plate are linked through the sliding block to achieve a coordinated action in which the baffle opens before the body of the electrical detection device and closes after the body of the electrical detection device.

[0010] Preferably, the lifting assembly includes a connecting rod, the bottom end of which is elastically connected to the top end of the sliding block via a first support spring. A rotating rod is rotatably connected to the outside of the connecting rod, and a support column fixed inside the protective housing is rotatably connected to the middle of the rotating rod. A lifting plate is rotatably connected to the other end of the rotating rod, and the lifting plate is used to support the body of the electrical detection device.

[0011] Preferably, the lifting plate is externally slidably connected to the inside of the baffle, and the inside of the baffle is provided with a locking mechanism. The locking mechanism includes a second support spring and a locking block fixed at one end. When the lifting plate rises to the working position, the locking block is engaged in the groove or plane on the side of the lifting plate under the action of the second support spring to achieve mechanical self-locking.

[0012] Preferably, the electrical detection device body is detachably fixed to the lifting plate by a locking component.

[0013] Preferably, the locking assembly includes a support housing fixed inside the body of the electrical detection device. A threaded rod is threadedly connected inside the support housing. A rotating handle is fixedly connected to the top end of the threaded rod, and a first sliding ball is fixedly connected to the bottom end. One or more second sliding balls are provided below the first sliding ball. When the threaded rod is tightened, the first sliding ball presses down on the second sliding ball, causing it to expand radially and lock into the mounting hole of the lifting plate.

[0014] Preferably, a distance sensor for precisely controlling the detection spacing is fixedly connected to the outside of the protective housing, a control module is fixedly connected inside the protective housing for coordinating the orderly operation of the various components of the device, and casters are rotatably connected to the bottom of the protective housing.

[0015] Preferably, a support rod is fixedly connected inside the protective shell, and a buffer pad is provided at the top of the support rod for buffering contact with the sliding frame when not in the detection working state.

[0016] A collaborative deployment and localization method for high-frequency near-field partial discharge detection includes the following steps:

[0017] S1: Device positioning and start-up preparation: Move the detection device to the vicinity of the electrical equipment to be tested, start the device through the control module, the electric push rod starts to work, drives the sliding block to slide upward along the guide rod, and then drives the sliding frame and the hollow plate fixed at its top to rise synchronously.

[0018] S2: Deployment and Signal Acquisition of Electrical Detection Device: The rise of the perforated plate pushes the rotating plate to rotate, causing the baffle to flip outward and open the top of the protective shell; at the same time, the sliding block pushes the lifting plate to rise smoothly through the lifting component, exposing the electrical detection device body fixed on it to the working position; the high-frequency near-field sensor built into the electrical detection device body is close to the surface of the power equipment to collect the high-frequency electromagnetic signals generated by partial discharge, and the control module processes and analyzes the signals in real time;

[0019] S3: Detection Completed and Device Status Returned: After the detection is completed, the control module controls the electric push rod to drive in the reverse direction, causing the sliding block to move down. This lifts the lifting plate and the main body of the electrical detection device, which then descend and retract into the protective housing. Subsequently, the sliding frame moves down, pushing the rotating plate to rotate and causing the baffle to close, thus completing the return of the main body of the electrical detection device to its non-working state.

[0020] This invention provides a cooperative deployment and positioning device and method for high-frequency near-field partial discharge detection. It has the following beneficial effects:

[0021] 1. This invention focuses on the overall structural design of high-frequency near-field partial discharge detection. By coordinating the deployment and positioning process of the high-frequency near-field sensor in the detection device, and taking into account the requirement of returning to the original position after detection, it enables the device to stably maintain a working posture and detection distance suitable for high-frequency near-field detection during the detection process. This reduces the problem of insufficient signal coupling caused by manual operation or unstable posture, thereby improving the stability and reliability of partial discharge detection results.

[0022] 2. By setting a coordinated action relationship between the baffle and the lifting mechanism, the present invention enables the orderly movement of the detection probe during the unfolding and retraction process. This avoids structural obstruction or mechanical interference to the detection probe before it enters the working state, and ensures that it returns to its original position in a timely manner after the detection is completed. This effectively reduces the risk of collision or damage to the high-frequency near-field sensor during the detection process and in the non-working state, and improves the safety of the equipment during field use.

[0023] 3. By introducing a mechanical self-locking and stable support structure into the detection device, the present invention enables the high-frequency near-field sensor to be in a relatively stable working state at the detection position. It can maintain the detection posture without easily shifting under field vibration or short-term detection conditions, which is beneficial for continuous acquisition of high-frequency near-field partial discharge signals and improves the repeatability and reliability of detection data.

[0024] 4. This invention integrates the high-frequency near-field partial discharge detection function with the deployment and positioning structure of the detection device, while also considering the structural return to its original position after detection. This reduces reliance on manual operation during on-site testing, enabling inspectors to quickly switch between testing procedures in mobile inspection scenarios, thus improving testing efficiency and reliability. It balances testing efficiency with equipment protection requirements, enhancing the applicability and practical value of the device in actual power equipment testing. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural view of the present invention;

[0026] Figure 2 This is a partial structural diagram of the moving wheel of the present invention;

[0027] Figure 3 This is a partial structural diagram of the distance sensor of the present invention;

[0028] Figure 4 This is a partial structural diagram of the support rod of the present invention;

[0029] Figure 5 This is a partial structural diagram of the connecting rod of the present invention;

[0030] Figure 6 This is a partial structural diagram of the baffle of the present invention;

[0031] Figure 7 This is a partial structural diagram of the perforated plate of the present invention;

[0032] Figure 8 This is a partial structural diagram of the control module of the present invention;

[0033] Figure 9 This is a partial structural diagram of the second sliding sphere of the present invention.

[0034] The components include: 1. Protective shell; 2. Electric push rod; 3. Sliding block; 4. Sliding frame; 5. Guide rod; 6. Hollow plate; 7. Rotating plate; 8. Baffle; 9. Lifting assembly; 91. Connecting rod; 92. First support spring; 93. Rotating rod; 94. Support column; 95. Lifting plate; 10. Electrical detection device body; 11. Control module; 12. Distance sensor; 13. Moving wheel; 14. Support rod; 15. Second support spring; 16. Locking block; 17. Locking assembly; 171. Support shell; 172. Threaded rod; 173. Rotating handle; 174. First sliding ball; 175. Second sliding ball. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] Please see the appendix Figure 1 -Appendix Figure 3 This invention provides a collaborative deployment and positioning device for high-frequency near-field partial discharge detection, including a protective shell 1. An electric push rod 2 is fixedly connected inside the protective shell 1. A sliding block 3 is fixedly connected to the output end of the electric push rod 2. A sliding frame 4 is slidably connected inside the sliding block 3. A guide rod 5 is fixedly connected inside the protective shell 1. The guide rod 5 is slidably connected to the inside of the sliding frame 4. A hollow plate 6 is fixedly connected to the top of the sliding frame 4. The sliding block 3, the sliding frame 4, and the hollow plate 6 are slidably connected to the outside of the protective shell 1. A rotating plate 7 is slidably connected inside the hollow plate 6. Both ends of the rotating plate 7 are rotatably connected to the inside of the protective shell 1. A baffle 8 is fixedly connected to the outside of the rotating plate 7. A lifting component 9 is provided at the top of the sliding block 3.

[0037] Specifically, the protective shell 1 supports the stable operation of the electric push rod 2, while the electric push rod 2 drives the sliding block 3 to slide up and down. The sliding connection between the sliding block 3 and the sliding frame 4 assists the sliding frame 4 in sliding. The core of this embodiment is that the electric push rod 2 serves as a single power source to drive the sliding block 3, thereby achieving orderly coordinated action between the opening and closing of the baffle 8 and the lifting and lowering of the electrical detection device body 10. When the sliding block 3 slides upward, it drives the sliding frame 4 to slide upward, and drives the hollow plate 6 to slide upward, causing the rotating plate 7 to slide inside the hollow plate 6. Under the drive of the rotating plate 7, the baffle 8 flips, and the hollow plate 6 slides inside the protective shell 1. The sliding frame 4 slides more stably under the guidance of the guide rod 5. The protective shell 1 then supports the rotation of the rotating plate 7 and the baffle 8, preventing mechanical conflict during the operation of the lifting assembly 9.

[0038] Please see the appendix Figure 5 -Appendix Figure 7 The lifting assembly 9 includes a connecting rod 91, the bottom end of which is attached to the top end of the sliding block 3. A first support spring 92 is fixedly connected inside the connecting rod 91, and the bottom end of the first support spring 92 is fixedly connected to the top end of the sliding block 3. A rotating rod 93 is rotatably connected to the outside of the connecting rod 91. A support column 94 is rotatably connected to one end of the rotating rod 93, and a lifting plate 95 is rotatably connected to the other end of the rotating rod 93.

[0039] Specifically, the protective shell 1 is used to support and fix the support column 94, and the support column 94 is used to support the rotating rod 93 to rotate. At the same time, the sliding block 3 is used to drive the first support spring 92 to compress, and the connecting rod 91 will contact the top of the sliding block 3, thereby driving the connecting rod 91 to slide upward. The connecting rod 91 will drive the rotating rod 93 and the lifting plate 95 to slide upward. Meanwhile, the lifting plate 95 is composed of a flat plate and a connecting block and other connecting mechanisms, and is used to support the electrical detection device body 10.

[0040] Please see the appendix Figure 5 -Appendix Figure 7 The rotating rod 93 is rotatably connected to the outside of the lifting plate 95 inside the protective shell 1, and the bottom end of the support column 94 is fixedly connected to the inside of the protective shell 1.

[0041] Specifically, the protective housing 1 provides movement space for the rotating rod 93 and the lifting plate 95 during operation, effectively preventing mechanical friction between the rotating rod 93 and the lifting plate 95 and the protective housing 1 during operation. At the same time, the protective housing 1 is used to support and fix the support column 94.

[0042] Please see the appendix Figure 6 -Appendix Figure 8The top of the lifting plate 95 is fixedly connected to the electrical detection device body 10, one end of the electrical detection device body 10 is fixedly connected to the control module 11, and the bottom end of the control module 11 is fixedly connected to the top of the lifting plate 95.

[0043] Specifically, the lifting plate 95 is used to support and fix the electrical detection device body 10 and the control module 11. The electrical detection device body 10 is used to capture abnormal signals such as partial discharge during equipment operation, identify potential hazards such as insulation aging, loose components, and poor contact in advance, and continuously monitor equipment operating parameters to assess health status. This not only prevents faults from escalating into power outages or equipment damage, but also prevents high-risk safety risks such as insulation breakdown and arc discharge, providing key basis for equipment condition-based maintenance. The control module 11 is used to coordinate the orderly operation of various components of the device. It receives and analyzes the partial discharge signals captured by the electrical detection device body 10, accurately processes the data to output clear detection results, and executes operation commands to control the lifting and locking of the lifting plate, switching of detection modules, and other actions.

[0044] Please see the appendix Figure 2 -Appendix Figure 4 A distance sensor 12 is fixedly connected to the outside of the protective housing 1, and a movable wheel 13 is rotatably connected inside the protective housing 1;

[0045] Specifically, the protective housing 1 is used to support and fix the distance sensor 12, and the distance sensor 12 can accurately control the detection distance to ensure that the probe is within the optimal detection distance range, avoiding signal saturation due to being too close or signal attenuation due to being too far away, thus improving the stability and accuracy of partial discharge signal acquisition. At the same time, the protective housing 1 has a drive structure inside, and the drive structure can drive the moving wheel 13 to run under the control of the control module 11.

[0046] Please see the appendix Figure 2 -Appendix Figure 4 The protective shell 1 is internally fixedly connected to a support rod 14;

[0047] Specifically, the protective outer shell 1 is used to support and fix the support rod 14. When the support rod 14 lowers the sliding frame 4 to the bottom, it will cause the sliding frame 4 to slide inside the sliding block 3 and slide to the top inside the sliding block 3, effectively preventing mechanical collision between the baffle 8 and the lifting plate 95 during operation. The top of the support rod 14 is provided with a buffer pad for cushioning contact with the sliding frame 4 when not in the detection working state.

[0048] Please see the appendix Figure 5 -Appendix Figure 7The lifting plate 95 is slidably connected to the inside of the baffle 8. The inside of the baffle 8 is fixedly connected to a second support spring 15. One end of the second support spring 15 is fixedly connected to a locking block 16. The outside of the locking block 16 is slidably connected to the inside of the baffle 8. The outside of the locking block 16 is attached to the outside of the lifting plate 95.

[0049] Specifically, the baffle 8 supports the compression of the second support spring 15 and also supports the sliding of the locking block 16. Simultaneously, the second support spring 15 pushes the locking block 16 back to its original position after sliding. A limiting groove (or limiting plane) is provided on the side of the lifting plate 95 corresponding to the position of the locking block 16. When the lifting plate 95 rises to its highest working position, this limiting groove (or plane) moves precisely to the position corresponding to the locking block 16. Under the restoring force of the second support spring 15, the end of the locking block 16 automatically engages in the groove (or fits tightly against the plane), forming a mechanical self-locking mechanism. This structure effectively prevents the lifting plate 95 from accidentally sliding downwards.

[0050] Please see the appendix Figure 7 -Appendix Figure 9 The electrical detection device body 10 is equipped with a locking component 17 inside;

[0051] Specifically, the electrical detection device body 10 can be firmly locked onto the surface of the lifting plate 95 by the locking component 17. The locking component 17 can ensure a tight connection between the electrical detection device body 10 and the lifting plate 95, avoid poor contact due to vibration or movement during the detection process, and prevent signal interruption or distortion of detection data.

[0052] Please see the appendix Figure 7 -Appendix Figure 9 The locking assembly 17 includes a support housing 171, which is externally fixedly connected to the inside of the electrical detection device body 10. A threaded rod 172 is threadedly connected to the inside of the support housing 171. A rotating handle 173 is fixedly connected to the top of the threaded rod 172. A first sliding ball 174 is fixedly connected to the bottom of the threaded rod 172. A second sliding ball 175 is slidably connected to the outside of the first sliding ball 174. The outside of the second sliding ball 175 is slidably connected to the inside of the support housing 171 and the lifting plate 95. The outside of the support housing 171 is slidably connected to the inside of the lifting plate 95, and the outside of the first sliding ball 174 is slidably connected to the inside of the support housing 171.

[0053] Specifically, the electrical detection device body 10 is used to support and fix the support housing 171, and the support housing 171 supports the rotation of the threaded rod 172. The working principle of the locking assembly 17 is as follows: When it is necessary to fix the electrical detection device body 10, the handle 173 is rotated clockwise, causing the threaded rod 172 to screw into the support housing 171. The first sliding ball 174 at the bottom of the threaded rod 172 moves downward, and its spherical surface presses against the two parallel second sliding balls 175 below. Under the constraint of the lifting plate 95 mounting hole wall below and laterally on the two second sliding balls 175, the downward pressing force of the first sliding ball 174 is converted into a radial expansion force, forcing the two second sliding balls 175 to expand radially to both sides, thereby tightly locking them in the mounting hole of the lifting plate 95, achieving a firm lock. Rotating the handle 173 counterclockwise reverses the process, causing the first sliding ball 174 to move upward and the second sliding ball 175 to lose its radial constraint, allowing the electrical detection device body 10, along with the supporting housing 171, to be removed from the lifting plate 95.

[0054] The workflow and collaborative actions of this invention are as follows:

[0055] When the device is needed, the electric push rod 2 is activated first to drive the sliding block 3 to slide upward. During the unfolding process, the sliding block 3 first drives the sliding frame 4 and the hollow plate 6 to rise, pushing the rotating plate 7 to rotate, thereby opening the baffle 8. This process ensures that the baffle 8 opens before the electrical detection device body 10. Subsequently, the sliding block 3 begins to compress the first support spring 92, and pushes the lifting plate 95 and the electrical detection device body 10 to rise smoothly to the working position by lifting assembly 9. When the lifting plate 95 reaches the top, the limiting groove on its side is locked by the locking block 16, achieving mechanical self-locking.

[0056] During the storage process, the electric push rod 2 is driven in the reverse direction. The sliding block 3 moves down first, lifting the lifting plate 95 and the electrical detection device body 10 by lifting the component 9, and the locking block 16 is pressed back, so that it is completely retracted into the protective shell 1. This process achieves that the electrical detection device body 10 descends before the baffle 8. Subsequently, the sliding block 3 continues to move down, driving the sliding frame 4 and the hollow plate 6 down, pushing the baffle 8 to close.

[0057] Through the aforementioned integrated and coordinated actions, the electrical detection device body 10 is restored to its orderly state after the detection is completed. This helps to reduce the unexpected impact on the high-frequency near-field detection components during the non-detection phase and improves the reliability of the device in actual detection scenarios.

[0058] When it is necessary to replace the electrical detection device body 10, first turn the handle 173 counterclockwise to move the first sliding ball 174 upward and the second sliding ball 175 radially contract, so that the electrical detection device body 10 can be pulled out upward, thereby achieving quick and tool-free replacement.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooperative deployment and positioning device for high-frequency near-field partial discharge detection, comprising a protective shell (1) and an electrical detection device body (10), characterized in that: An electric push rod (2) is fixedly connected inside the protective shell (1). A sliding block (3) is fixedly connected to the output end of the electric push rod (2). A sliding frame (4) is slidably connected inside the sliding block (3). A guide rod (5) is fixedly connected inside the protective shell (1). The guide rod (5) is slidably connected to the inside of the sliding frame (4). A hollow plate (6) is fixedly connected to the top of the sliding frame (4). A rotating plate (7) is slidably connected inside the hollow plate (6). Both ends of the rotating plate (7) are rotatably connected to the inside of the protective shell (1). A baffle (8) is fixedly connected to the outside of the rotating plate (7). A lifting component (9) for directly lifting the electrical detection device body (10) is provided at the top of the sliding block (3). The movement of the lifting component (9) and the movement of the hollow plate (6) are linked through the sliding block (3) to achieve the coordinated action of the baffle (8) opening before the electrical detection device body (10) and closing after the electrical detection device body (10). The lifting assembly (9) includes a connecting rod (91), the bottom end of which is elastically connected to the top of the sliding block (3) via a first support spring (92). A rotating rod (93) is rotatably connected to the outside of the connecting rod (91). A support column (94) fixed inside the protective shell (1) is rotatably connected to the middle of the rotating rod (93). A lifting plate (95) is rotatably connected to the other end of the rotating rod (93). The lifting plate (95) is used to support the body of the electrical detection device (10). The lifting plate (95) is externally slidably connected to the inside of the baffle (8). The inside of the baffle (8) is provided with a locking mechanism, which includes a second support spring (15) and a locking block (16) fixed at one end. When the lifting plate (95) rises to the working position, the locking block (16) is engaged in the groove or plane on the side of the lifting plate (95) under the action of the second support spring (15) to achieve mechanical self-locking. The protective shell (1) is fixedly connected to a distance sensor (12) for precise control of the detection distance. The protective shell (1) is fixedly connected to a control module (11) for coordinating the orderly operation of the various components of the device. The bottom of the protective shell (1) is rotatably connected to a moving wheel (13).

2. The cooperative deployment and positioning device for high-frequency near-field partial discharge detection according to claim 1, characterized in that: The electrical detection device body (10) is detachably fixed to the lifting plate (95) by a locking component (17).

3. The cooperative deployment and positioning device for high-frequency near-field partial discharge detection according to claim 2, characterized in that: The locking assembly (17) includes a support housing (171) fixed inside the electrical detection device body (10). The support housing (171) is threaded with a threaded rod (172). The top end of the threaded rod (172) is fixedly connected to a rotating handle (173), and the bottom end is fixedly connected to a first sliding ball (174). One or more second sliding balls (175) are provided below the first sliding ball (174). When the threaded rod (172) is tightened, the first sliding ball (174) presses down on the second sliding ball (175), causing it to expand radially and lock into the mounting hole of the lifting plate (95).

4. The cooperative deployment and positioning device for high-frequency near-field partial discharge detection according to claim 1, characterized in that: The protective shell (1) is fixedly connected to a support rod (14), and the top of the support rod (14) is provided with a buffer pad for contacting and buffering the sliding frame (4) when not in the detection working state.

5. A cooperative deployment and localization method for high-frequency near-field partial discharge detection, characterized in that, The method, used in any one of claims 1-4, comprises the following steps: S1: Device positioning and start-up preparation: Move the detection device to the vicinity of the electrical equipment to be tested, start the device through the control module (11), the electric push rod (2) starts working, drives the sliding block (3) to slide upward along the guide rod (5), and then drives the sliding frame (4) and the hollow plate (6) fixed at its top to rise synchronously. S2: The electrical detection device body (10) unfolds and signals are acquired: The rise of the hollow plate (6) pushes the rotating plate (7) to rotate, causing the baffle (8) to flip outward and open the top of the protective shell (1); at the same time, the sliding block (3) pushes the lifting plate (95) to rise smoothly through the lifting component (9), so that the electrical detection device body (10) fixed on it is exposed to the working position; the high-frequency near-field sensor built into the electrical detection device body (10) is close to the surface of the power equipment to acquire the high-frequency electromagnetic signal generated by partial discharge, and the control module (11) processes and analyzes the signal in real time; S3: Detection completed and device status returned to normal: After the detection is completed, the control module (11) controls the electric push rod (2) to drive in the reverse direction, so that the sliding block (3) moves down, and the lifting assembly (9) drives the lifting plate (95) and the electrical detection device body (10) to descend and return to the inside of the protective shell (1); then, the sliding frame (4) moves down to push the rotating plate (7) to rotate, and drives the baffle (8) to close, completing the non-working state return of the electrical detection device body (10).

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