Partial discharge detection device and inspection equipment

Abstract

The utility model provides a partial discharge detection device and inspection equipment. The partial discharge detection device comprises a telescopic device, a power device, a front cover, a detection device, a trigger device, a switch and a balance pressing rod. The telescopic device moves in the first direction, the front cover, the detection device and the switch move along with the telescopic device, and after the front cover makes contact with the detected object and stops moving, the switch continues to move along with the telescopic device. And after the trigger device triggers the switch, the power device stops, so that interference caused by the power device in the partial discharge detection process is reduced, and the accuracy of a detection result is improved. When the front cover bears the abutting force in the second direction opposite to the first direction, the front cover extrudes the balance pressing rod in the second direction, so that the balance pressing rod swings relative to the telescopic device, it is ensured that when the front cover is locally stressed, the stress of the front cover is evenly transmitted to the other side, the trigger device can normally trigger the switch, and the accuracy of the detection result is improved.

Description

Technical Field

[0001] This application relates to the technical field of partial discharge detection, and particularly to a partial discharge detection device and an inspection device. Background Art

[0002] When the electric field intensity generated by an applied voltage in an electrical equipment is sufficient to cause discharge in a partial area of the insulation, but no fixed discharge channel is formed in the discharge area, this discharge phenomenon is called the partial discharge phenomenon, abbreviated as partial discharge. Partial discharge detection is based on various phenomena generated by partial discharge, and characterizes the state and characteristics of partial discharge through physical quantities that can express these phenomena, such as sound, light, electricity, etc. Among them, the non-invasive detection principle based on ultrasonic signals and radio electromagnetic radiation is currently the most effective partial discharge detection technology.

[0003] During the process of partial discharge detection by existing partial discharge detection devices, there is a problem that the accuracy of data is affected by the interference of the power source. Utility Model Content

[0004] This application provides a partial discharge detection device and an inspection device that can improve the accuracy of detection results.

[0005] An embodiment of this application provides a partial discharge detection device, including a telescopic device, a power device, a front cover, a detection device, a trigger device, a switch and a balance pressure rod. The power device is used to drive the telescopic device to extend and retract along a first direction. The front cover, the detection device and the switch move along with the telescopic device. After the front cover contacts the object to be detected and stops moving, the switch continues to move along with the telescopic device in the direction close to the trigger device. After the trigger device triggers the switch, the power device stops running. When the front cover is subjected to a top force in a second direction opposite to the first direction, the front cover squeezes the balance pressure rod along the second direction, causing it to swing relative to the telescopic device.

[0006] Further, it includes an assembled part and an abutting part arranged oppositely. The assembled part is rotatably connected to the telescopic device, and the front cover squeezes the abutting part along the second direction.

[0007] Further, the balance pressure rod includes a connecting part, a pair of the assembled parts respectively extending from opposite ends of the connecting part, and a rod-shaped part extending from the connecting part. The abutting part is arranged on the rod-shaped part.

[0008] Further, the rod-shaped part can be switched between an initial state, an intermediate state, and a final state. In the initial state, the rod-shaped part is inclined relative to the front cover and forms a first included angle with the front cover; in the intermediate state, the rod-shaped part is parallel to the front cover; in the final state, the rod-shaped part is inclined relative to the front cover and forms a second included angle with the front cover, and the first included angle is equal to the second included angle.

[0009] Further, the rod-shaped part at least includes a first rod-shaped part and a second rod-shaped part, and the first rod-shaped part and the second rod-shaped part are respectively located at opposite ends of the connecting part.

[0010] Further, the front cover includes opposite first and second ends. The first rod-shaped part extends along the length direction of the first end, and the second rod-shaped part extends along the length direction of the second end. The distance between the triggering device and the first rod-shaped part is less than the distance between the triggering device and the second rod-shaped part.

[0011] Further, the detection device is located between the first rod-shaped part and the second rod-shaped part, and the triggering device is located between the detection device and the first rod-shaped part.

[0012] Further, the telescopic device includes a telescopic member and a connecting plate fixed to the telescopic member. The connecting plate follows the telescopic member and extends and retracts along the first direction. The partial discharge detection device includes a spring located between the front cover and the connecting plate. After the front cover contacts the object to be detected and stops moving, the connecting plate continues to move in the first direction towards the front cover and compresses the spring, and the spring is located between the detection device and the second rod-shaped part.

[0013] Further, the telescopic device at least includes a first telescopic rod and a second telescopic rod, and the first telescopic rod can extend and retract relative to the second telescopic rod along the first direction.

[0014] The embodiment of the present application also provides an inspection device, including the above partial discharge detection device.

[0015] The partial discharge detection device of the embodiment of the present application includes a triggering device and a trigger switch. When the triggering device triggers the switch, the power device stops running to reduce the interference brought by the power device during the partial discharge detection process and improve the accuracy of the detection result; the setting of the balance pressure rod can evenly transfer the force on the front cover to the other side when the front cover is locally stressed, ensuring the fitting of the partial discharge detection device, so as to ensure that the triggering device can normally trigger the switch and improve the accuracy of the detection result. Description of the Drawings

[0016] Figure 1Is a perspective view of the partial discharge detection device according to an embodiment of the present application, wherein the telescopic device is in a retracted state;

[0017] Figure 2 Is Figure 1 A perspective view of the partial discharge detection device shown, wherein the telescopic device is in an extended state;

[0018] Figure 3 Is Figure 1 An exploded view of the partial discharge detection device shown;

[0019] Figure 4 Is Figure 3 An assembly view of the balance pressure plate, the detection device, the trigger device and the front cover shown;

[0020] Figure 5 Is Figure 3 A perspective view of the connecting plate of the partial discharge detection device shown;

[0021] Figure 6 Is Figure 3 A perspective view of the connecting member of the partial discharge detection device shown;

[0022] Figure 7 Is Figure 1 A schematic diagram when the trigger switch of the trigger device of the partial discharge detection device shown is triggered;

[0023] Figure 8 Is Figure 7 An enlarged view of the circled part at A in the schematic diagram shown;

[0024] Figure 9 Is Figure 3 A perspective view of the balance pressure rod of the partial discharge detection device shown;

[0025] Figure 10 Is Figure 3 A schematic cross-sectional view after the front cover, the balance pressure rod, the connecting plate, the first spring, the second spring and the trigger device of the partial discharge detection device shown are assembled;

[0026] Figure 11 Is Figure 3 A perspective view of the telescopic device of the partial discharge detection device shown;

[0027] Figure 12 Is Figure 3 A rear view of the partial discharge detection device shown after the first sleeve and the second sleeve are assembled;

[0028] Figure 13 Is Figure 1 A schematic cross-sectional view of the partial discharge detection device shown. Detailed implementation mode

[0029] Here, in conjunction with the accompanying drawings, the technical solutions in the embodiments (or "embodiments") of the present application will be clearly and completely described. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement conditions between components in a specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0031] The connections and fixations in the embodiments of the present application include direct connections and direct fixations, and also include indirect connections and indirect fixations.

[0032] In environments such as computer rooms, factories, and power distribution rooms, manual inspection by staff has large measurement errors, is prone to missed inspections, is difficult, and takes a long time, and there are dangerous working conditions such as high temperature, high pressure, and electricity. Therefore, various inspection devices suitable for such environments have begun to be developed in the market to replace manual operations. The inspection device of the embodiments of the present application includes a partial discharge detection device 100, which can perform discharge detection on electrical equipment such as electrical control cabinets.

[0033] The partial discharge detection device 100 has good working stability, can stably detect the current on the surface of the object to be detected in the form of ultrasonic waves and ground waves. In addition, as a component of the inspection machine, it has the characteristics of being detachable, maintainable, and replaceable.

[0034] See Figures 1 to 4 , the partial discharge detection device 100 of the embodiments of the present application includes a power device 11, a telescopic device 2, a front cover 31, a detection device 32, a trigger device 33, and a switch 34.

[0035] The power device 11 is used to drive the telescopic device 2 to extend and retract along the first direction ( Figure 1 the arrow direction in

[0036] When the front cover 31 comes into contact with the object to be detected, the detection device 32 is at a certain distance from the object to be detected to ensure the insulation thickness between the detection device 32 and the object to be detected. Otherwise, it will cause abnormal test data. In some embodiments, the insulation thickness is greater than or equal to 1.5 mm and less than or equal to 2 mm. The present application does not limit the insulation thickness and can be set according to actual needs.

[0037] In some embodiments, the front cover 31 is fixed to the telescopic device 2. The front cover 31 can be directly fixed to the telescopic device or indirectly fixed, as long as the telescopic device 2 can move the front cover 31.

[0038] In some embodiments, the detection device 32 is fixed to the front cover 31. The detection device 32 can be directly fixed to the front cover 31 or indirectly fixed, as long as the front cover 31 can move the detection device 32.

[0039] In some embodiments, the front cover 31 is made of an insulating material to affect the accuracy of the partial discharge detection result.

[0040] In some embodiments, the partial discharge detection device 100 includes a fixing member 35. The fixing member 35 is fixed to the front cover 31 and presses the partial discharge detection device 100 to fix the partial discharge detection device 100 on the front cover 31.

[0041] In some embodiments, the power device 11 can be a motor or a cylinder, etc., to provide a power source for the extension and retraction of the telescopic device 2.

[0042] In some embodiments, the partial discharge detection device 100 may further include a speed change device 12 connected to the power device 11, such as a gearbox, etc., to output a greater torque.

[0043] The partial discharge detection device 100 further includes a fixed seat 13. The power device 11 and the speed change device 12 are fixed on the fixed seat 13.

[0044] When detection is required, the power device 11 drives the telescopic device 2 to extend. The telescopic device 2 drives the front cover 31 and the detection device 32 to extend until the front cover 31 fits against the surface to be detected, and the detection device 32 performs detection. When the detection is completed, the power device 11 drives the telescopic device 2 to retract. The telescopic device 2 drives the front cover 31 and the detection device 32 to retract, and the inspection device moves to the next place to be detected for the next detection.

[0045] The switch 34 moves in the direction close to the switch 24 following the telescopic device 2. By whether the trigger device 33 triggers the switch 34, the start and stop of the power device 11 are controlled. During the partial discharge detection process, the power device 11 is powered off to reduce interference and improve the accuracy of the detection result.

[0046] In some embodiments, the triggering device 33 is fixed to the front cover 31 and moves with the front cover 31; the switch 34 is fixed to the telescopic device 2 and can move with the telescopic device 2.

[0047] In some embodiments, the triggering device 33 can also be stationary, for example, fixed to a non-moving component of the partial discharge detection device 100, and the switch 34 can move in a direction closer to or away from the triggering device 33 following the telescopic device 2.

[0048] Before the telescopic device 2 extends until the front cover 31 contacts the object to be detected, there is a certain distance between the front cover 31 and the telescopic device 2, that is, there is a certain distance between the triggering device 33 and the switch 34, and the triggering device 33 does not trigger the switch 34; after the front cover 31 contacts the object to be detected and stops moving, the switch 34 continues to move in a direction closer to the triggering device 33 following the telescopic device 2. After the triggering device 33 triggers the switch 34, the power device 11 stops operating and the telescopic device 2 stops moving.

[0049] In some embodiments, the triggering device 33 is located at one end of the front cover 31, making rational use of space, which is beneficial to the structural compactness of the partial discharge detection device 100 and conducive to its miniaturization.

[0050] See Figures 3 to 6 , the partial discharge detection device 100 includes a connecting member 41 fixed to the telescopic device 2 and a connecting plate 42 fixed to the connecting member 41.

[0051] The connecting member 41 includes a first fixing portion 411 and a second fixing portion 412 fixed to the first fixing portion 411. The first fixing portion 411 is fixed to the telescopic device 2, and the second fixing portion 412 is fixed to the connecting plate 42.

[0052] The connecting plate 42 includes a frame-shaped main body portion 421. The main body portion 421 encloses an opening 4211, and the second fixing portion 412 is located within the opening 4211 and fixed to the main body portion 421, with a compact structure and beneficial for saving space. An avoidance hole 4210 is provided on the main body portion 421 to avoid the triggering device 33.

[0053] In some embodiments, the connecting member 41 can also be integrally provided with the telescopic device 2.

[0054] In some embodiments, the first fixing portion 411 and the telescopic device 2 can be fixed by screws, which is convenient for assembly and disassembly.

[0055] In some embodiments, the second fixing portion 412 and the main body portion 421 can be fixed by screws, which is convenient for assembly and disassembly.

[0056] The partial discharge detection device 100 further includes a spring 51. The spring 51 is located between the front cover 31 and the connecting plate 42, ensuring that there is a floating margin after the front cover 31 contacts the surface of the object to be detected, so that the front cover 31 can closely fit the object to be detected. At the same time, the front cover 31 is lifted to maintain a certain distance from the connecting plate 42. After the front cover 31 contacts the object to be detected and stops moving, the connecting plate 42 continues to move in the first direction towards the front cover 31 and presses the spring 51. When the partial discharge detection device 100 disengages from the object to be detected, the elastic force of the spring 51 abuts against the front cover 31, causing it to reset and maintain a certain distance from the connecting plate 42.

[0057] The main body portion 421 is provided with a first through hole 4212, and the front cover 31 is provided with a second through hole 310. The partial discharge detection device 100 further includes a pin 52. The pin 52 passes through the first through hole 4212 and is assembled in the through hole 310 to movably limit the front cover 31 on the connecting plate 42.

[0058] In some embodiments, the spring 51 is disposed around the periphery of the pin 52, with a compact structure, which is beneficial to saving space.

[0059] See Figures 7 to 8 , in some embodiments, the switch 34 is a photoelectric switch. The photoelectric switch is short for a photoelectric proximity switch. It uses the occlusion or reflection of a light beam by the object to be detected to connect the circuit through a synchronous circuit, thereby detecting the presence or absence of an object.

[0060] The switch 34 can also be an ordinary push-button switch. The present application does not limit the type of the switch 34.

[0061] The triggering device 33 includes a shielding piece 331. The shielding piece 331 blocks the light emitted by the light source of the photoelectric switch to trigger the photoelectric switch. After the front cover 31 contacts the object to be detected and stops moving, the switch 34 continues to move in the direction towards the triggering device 33 following the telescopic device 2. The shielding piece 331 of the triggering device 33 enters between the transmitting end 341 and the receiving end 342 of the photoelectric switch to trigger the photoelectric switch. After receiving the signal, the photoelectric switch cuts off the power supply to the power device 11, so that interference from other components to the partial discharge detection data during the detection process can be greatly eliminated, and the accuracy of the detection data can be improved.

[0062] In some embodiments, the triggering device 33 is fixed to the front cover 31 by screws. Optionally, the triggering device 33 can also be fixed to the front cover 31 by welding or bonding. The present application does not limit the fixing method of the triggering device 33 to the front cover 31.

[0063] See Figure 3, the partial discharge detection device 100 includes a controller board 61 and an elastic connection line 62 electrically connected to the controller board 61. The photoelectric switch is electrically connected to the controller board 61. One end of the controller board 61 is connected to the telescopic device 2, and the other end is connected to the connection line 62. The other end of the connection line 62 is fixed to the fixed seat 13. When the telescopic device 2 extends, it drives the controller board 61 and the photoelectric switch to extend, and the connection line 62 extends like a spring to ensure the length of the connection line 62. When the telescopic device 2 retracts, it drives the controller board 61 and the photoelectric switch to retract.

[0064] When the partial discharge detection device 100 works, the front cover 31 needs to be flush against the surface of the object to be detected. Due to the limitation of on-site installation accuracy, there is often a certain inclination angle between the front cover 31 and the detection object after the telescopic device 2 extends, resulting in uneven force on the spring 51 and unilateral compression of the front cover 31. Since the triggering device 33 is located at one end of the front cover 31, when the front cover 31 is unilaterally compressed and deformed, it is easy to cause the triggering device 33 to fail to trigger the switch 34 while the power device 11 keeps working, affecting the accuracy of the detection result.

[0065] See Figures 9 to 10 , the partial discharge detection device 100 further includes a balance pressure bar 7. When the front cover 31 is subjected to a top force in the second direction opposite to the first direction, the front cover 31 squeezes the balance pressure bar 7 along the second direction, causing it to swing relative to the telescopic device 2. When the front cover 31 is locally stressed, the force on the front cover 31 can be evenly transmitted to the other side to ensure the fitting of the front cover 31, so as to ensure that the triggering device 33 can normally trigger the switch 34 and improve the accuracy of the detection result.

[0066] In some embodiments, the balance pressure bar 7 is rotatably connected to the telescopic device 2.

[0067] In some embodiments, the balance pressure bar 7 includes an assembly part 73 and an abutting part 740 arranged oppositely. The assembly part 73 is rotatably connected to the telescopic device 2. When the front cover 31 is subjected to a top force in the second direction opposite to the first direction and squeezes the abutting part 740 along the second direction, the balance pressure bar 7 swings relative to the telescopic device 2.

[0068] In some embodiments, the balance pressure bar 7 includes a connecting part 72, a pair of assembly parts 73 respectively extending from opposite ends of the connecting part 72, and a rod-shaped part 74 extending from the connecting part 72. The abutting part 740 is arranged on the rod-shaped part 74. The pair of assembly parts 73 are respectively rotatably connected to opposite ends of the telescopic device 2. The flexible constraint effect of the balance pressure bar 7 is better, ensuring that the front cover 31 can effectively fit the object to be detected.

[0069] In some embodiments, the rod portion 74 at least includes a first rod portion 741 and a second rod portion 742, and the first rod portion 741 and the second rod portion 742 are respectively located at opposite ends of the connecting portion 72.

[0070] Assembly holes 731 are respectively provided on the assembly portion 73. Refer to Figure 5 and Figure 10 , a column 423 is provided on the main body portion 421, and the column 423 is assembled in the assembly hole 731 to rotatably assemble the balance pressure rod 7 on the connecting plate 42.

[0071] Refer to Figure 4 , the partial discharge detection device 100 includes a crimping member 36 fixed to the front cover 31 for crimping the abutting portion 740 to increase the stability of the balance pressure rod 7.

[0072] In some embodiments, the crimping member 36 at least includes a first crimping member 361, and the first crimping member 361 is crimped to the first rod portion 741.

[0073] In some embodiments, the crimping member 36 at least includes a second crimping member 362, and the second crimping member 362 is crimped to the second rod portion 742.

[0074] The rod portion 74 can be switched between an initial state, an intermediate state, and a final state. In the initial state, the rod portion 74 is inclined relative to the front cover 31 and forms a first included angle with the front cover 31; in the intermediate state, the rod portion 74 is parallel to the front cover 31; in the final state, the rod portion 74 is inclined relative to the front cover 31 and forms a second included angle with the front cover 31, and the first included angle is equal to the second included angle. This can ensure that the influence of the balance pressure rod 7 on the attitude of the front cover 31 before and after rotation is unified, so that the front cover 31 is always uniformly stressed and will not tilt.

[0075] The front cover 31 presses the rod portion 74 to switch it between the initial state, the intermediate state, and the final state.

[0076] Refer to Figure 4 , in some embodiments, the front cover 31 includes opposite first end 311 and second end 312, the first rod portion 741 extends along the length direction of the first end 311, the second rod portion 742 extends along the length direction of the second end 312, the distance between the triggering device 33 and the first rod portion 741 is less than the distance between it and the second rod portion 742, and the structure of the partial discharge detection device 100 is compact.

[0077] In some embodiments, the detection device 32 is located between the first rod portion 741 and the second rod portion 742, and the triggering device 33 is located between the detection device 32 and the first rod portion 741, and the structure of the partial discharge detection device 100 is compact.

[0078] In some embodiments, the central axes of the triggering device 33, the detecting device 32, and the front cover 31 are collinear, improving the accuracy of the triggering device 33 to trigger the switch 34.

[0079] In some embodiments, the spring 51 is located between the detecting device 32 and the second rod-shaped portion 742, making the structure of the partial discharge detecting device 100 compact.

[0080] In some embodiments, the spring 51 at least includes a first spring 511 and a second spring 512. The distance between the first spring 511 and the connecting portion 72 is less than the distance between the second spring 512 and the connecting portion 72, enabling the front cover 31 to be stressed evenly and have a better reset effect.

[0081] See Figure 11 , in some embodiments, the telescopic device 2 includes a telescopic member 21. The connecting plate 42 is fixed to the telescopic member 21, and the connecting plate 42 extends and retracts along the first direction following the telescopic member 21.

[0082] In some embodiments, the telescopic member 21 is a multi-stage push rod, which greatly improves the control of the accuracy of the telescopic amount and the total telescopic stroke, achieving universality for different scenarios; the application does not limit the number of multi-stage push rods, which can be limited according to actual needs.

[0083] In some embodiments, the telescopic member 21 at least includes a first telescopic rod 211 and a second telescopic rod 212. The first telescopic rod 211 can extend and retract relative to the second telescopic rod 212 along the first direction.

[0084] The telescopic member 21 further includes a fixed rod 20. The second telescopic rod 212 can extend and retract relative to the fixed rod 20. The fixed rod 20 is fixed on the fixed seat 13.

[0085] See Figures 1 to 3 , the partial discharge detecting device 100 at least includes a telescopic sleeve 81, which can hide and protect components such as the telescopic device 2, the controller board 61, and the triggering device 33. The telescopic sleeve 81 extends and retracts following the telescopic device 2.

[0086] In some embodiments, the telescopic sleeve 81 at least includes a first sleeve 811 and a second sleeve 812. When the telescopic device 2 extends and retracts, the first sleeve 811 can move relative to the second sleeve 812. After the telescopic device 2 retracts, the second sleeve 812 is located inside the first sleeve 811.

[0087] When the partial discharge detecting device 100 is in use, after the power device 11 receives an instruction, it outputs torque to the telescopic device 2 through the speed-changing device, realizing the synchronous extension and retraction of the telescopic sleeve 81, ensuring the accuracy of transmission and increasing the telescopic stroke of the telescopic sleeve 81 at the same time.

[0088] In some embodiments, the second sleeve 812 is fixed to the fixing rod 20 and is immovable; the front end 8111 of the first sleeve 811 is fixed to the connecting plate 42 so that the first sleeve 811 extends and retracts following the connecting plate 42.

[0089] In some embodiments, the first sleeve 811 and the second sleeve 812 are made of carbon fiber, which not only reduces metal interference but also has high strength and hardness.

[0090] See Figure 12 , in some embodiments, the partial discharge detection device 100 includes a spacer 82 located between the first sleeve 811 and the second sleeve 812 to prevent the first sleeve 811 and the second sleeve 812 from directly grinding against each other and generating carbon powder that affects the use.

[0091] In some embodiments, the spacer 82 is fixed to the rear end 8112 of the first sleeve 811. When the first sleeve 811 moves relative to the second sleeve 812, the spacer 82 contacts the second sleeve 812 and slides along the second sleeve 812.

[0092] In some embodiments, one or more spacers 82 can be provided; optionally, one spacer 82 can be annular and surround the periphery of the second sleeve 812; optionally, multiple spacers 82 are respectively located on different sides of the second sleeve 812.

[0093] In Figure 12 , four spacers 82 are provided, and the present application does not limit the number of spacers 82.

[0094] See Figure 3 , in some embodiments, the first sleeve 811 is provided with a hole 8110, and the spacer 82 is provided with a convex column 821 to be assembled in the hole 8110 to realize the fixation of the spacer 82 to the first sleeve 811. Optionally, the spacer 82 and the first sleeve 811 can also be fixed by screws, welding, bonding or other means.

[0095] In some embodiments, the spacer 82 is made of POM plastic (Poly Oxy Methylene polyformaldehyde resin).

[0096] See Figure 1 , in some embodiments, the front cover 31 includes a top wall 313 and side walls 314 extending from the top wall 313. The side walls 314 surround the outside of the front end 8111 of the first sleeve 811. The top wall 313 is provided with a through hole 3131 corresponding to the detection device 32.

[0097] See Figure 13, the telescopic device 2 is in the retracted state. When the partial discharge detection device 100 operates, the power device 11 drives the telescopic device 2 to extend. The telescopic device 2 drives the front cover 31, the detection device 32, the triggering device 33, the switch 34, the spring 51 and the balance pressure bar 7 to extend together. After the front cover 31 contacts the object to be detected, the front cover 31, the detection device 32 and the triggering device 33 stop moving. The telescopic device 2 drives the switch 34 to continue to extend and compress the spring 51 and the balance pressure bar 7. When the triggering device 33 triggers the switch 34, the power device 11 stops running, and the detection device 32 starts the detection work; after the detection is completed, the inspection equipment drives the partial discharge detection device 100 to retreat in the second direction. Due to the abutting force of the spring 51, the front cover 31 remains in the position where it is attached to the object to be detected. The telescopic device 2 drives the switch 34 to move in the second direction, and the switch 34 is away from the triggering device 33 and is in the untriggered state. The power device 11 starts and reverses to drive the telescopic device 2 to retract, and drives the front cover 31, the detection device 32 and the triggering device 33 to retract to Figure 12 the state of.

[0098] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. A partial discharge detection device, characterized in that: include: A telescopic device, a power device, a front cover, a detection device, a trigger device, a switch and a balancing pressure rod, wherein the power device is used to drive the telescopic device to extend and retract along a first direction, and the front cover, the detection device and the switch move following the telescopic device. After the front cover comes into contact with the object to be detected and stops moving, the switch continues to move following the telescopic device toward the direction approaching the trigger device. After the trigger device triggers the switch, the power device stops. When the front cover is subjected to a counterforce in a second direction opposite to the first direction, the front cover presses the balancing pressure rod along the second direction to make it swing relative to the telescopic device.

2. The partial discharge detection device according to claim 1, characterized in that: The balancing pressure rod comprises an assembling portion and an abutting portion which are arranged opposite to each other, the assembling portion is rotatably connected to the telescopic device, and the front cover presses the abutting portion along the second direction.

3. The partial discharge detection device according to claim 2, characterized in that: The balancing pressure rod includes a connecting portion, a pair of assembling portions extending from opposite ends of the connecting portion, and a rod-shaped portion extending from the connecting portion, and the abutting portion is disposed on the rod-shaped portion.

4. The partial discharge detection device according to claim 3, characterized in that: The rod-shaped portion can switch between an initial state, an intermediate state and a final state. In the initial state, the rod-shaped portion is inclined relative to the front cover and forms a first angle with the front cover; in the intermediate state, the rod-shaped portion is parallel to the front cover; in the final state, the rod-shaped portion is inclined relative to the front cover and forms a second angle with the front cover, and the first angle is equal to the second angle.

5. The partial discharge detection device according to claim 3, characterized in that: The rod-shaped portion at least includes a first rod-shaped portion and a second rod-shaped portion, and the first rod-shaped portion and the second rod-shaped portion are respectively located at two opposite ends of the connecting portion.

6. The partial discharge detection device according to claim 5, characterized in that: The front cover includes a first end and a second end opposite to each other, the first rod-shaped portion extends along the length direction of the first end, the second rod-shaped portion extends along the length direction of the second end, and the distance between the trigger device and the first rod-shaped portion is smaller than the distance between the trigger device and the second rod-shaped portion.

7. The partial discharge detection device according to claim 6, characterized in that: The detection device is located between the first rod-shaped portion and the second rod-shaped portion, and the trigger device is located between the detection device and the first rod-shaped portion.

8. The partial discharge detection device according to claim 7, characterized in that: The telescopic device includes a telescopic part and a connecting plate fixed to the telescopic part, and the connecting plate extends and retracts along the first direction following the telescopic part. The partial discharge detection device includes a spring located between the front cover and the connecting plate. After the front cover contacts the object to be detected and stops moving, the connecting plate continues to move along the first direction toward the front cover and squeezes the spring. The spring is located between the detection device and the second rod-shaped portion.

9. The partial discharge detection device according to any one of claims 1 to 8, characterized in that: The telescopic device at least includes a first telescopic rod and a second telescopic rod, and the first telescopic rod can be extended and retracted relative to the second telescopic rod along the first direction.

10. A patrol inspection device, characterized in that: It comprises the partial discharge detection device as described in any one of claims 1 to 9.

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