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 proximity switch and a control device. The power device is used for driving the telescopic device to stretch out and retract in the first direction. The front cover is rotationally connected with the telescopic device so as to swing relative to the telescopic device. The front cover, the detection device and the proximity switch move along with the telescopic device. When the front cover is in contact with the detected object and stops moving, the control device controls the power device to stop according to a signal sent by the proximity switch, 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; the front cover is rotationally connected with the telescopic device, and when the front cover is locally stressed, the front cover swings relative to the telescopic device, so that the fitness of the partial discharge detection device is ensured, and the accuracy of a detection result is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the partial discharge detection technical field, and particularly relates to a partial discharge detection device and a patrol inspection equipment. BACKGROUND

[0002] When the field strength generated by the applied voltage in the electrical equipment is enough to make the discharge of the insulation part region, but no fixed discharge channel is formed in the discharge region, the discharge phenomenon is called partial discharge, which is abbreviated as partial discharge. Partial discharge detection is based on various phenomena generated by partial discharge, and the state and characteristics of partial discharge are represented by physical quantities such as sound, light, electricity and the like. The non-intrusive detection principle based on ultrasonic signals and radio electromagnetic radiation is the most effective partial discharge detection technology at present.

[0003] In the process of partial discharge detection, the existing partial discharge detection device has the problem of affecting the accuracy of data due to the interference of the power source. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a partial discharge detection device and a patrol inspection equipment which can improve the accuracy of detection results.

[0005] The present application provides a partial discharge detection device, which comprises a telescopic device, a power device, a front cover, a detection device, a proximity switch and a control device. The power device is used to drive the telescopic device to extend and retract along a first direction. The front cover is rotationally connected with the telescopic device to swing relative to the telescopic device. The front cover, the detection device and the proximity switch move with the telescopic device. When the front cover contacts a detected object and stops moving, the control device controls the power device to stop according to the signal sent by the proximity switch.

[0006] Further, the proximity switch is fixed with the front cover.

[0007] Further, the front cover is provided with a first hole, and the partial discharge detection device comprises a limiting screw assembled to the first hole. The limiting screw is fixed with the telescopic device, and the front cover swings relative to the limiting screw.

[0008] Further, the telescopic device comprises a telescopic piece and a connecting plate fixed with the telescopic piece. The connecting plate extends and retracts along the first direction with the telescopic piece. The limiting screw is fixed with the connecting plate.

[0009] Further, the partial discharge detection device comprises a spring located between the front cover and the connecting plate.

[0010] Furthermore, the telescopic device includes at least a first telescopic rod and a second telescopic rod, wherein the first telescopic rod can extend and retract relative to the second telescopic rod along the first direction, and the connecting plate is fixed to the first telescopic rod.

[0011] Furthermore, the partial discharge detection device includes at least a first sleeve and a second sleeve. The first sleeve is fixed to the connecting plate. When the telescopic device extends and retracts, the first sleeve can move relative to the second sleeve. After the telescopic device retracts, the second sleeve is located inside the first sleeve.

[0012] Furthermore, the front cover includes a top wall and a side wall extending from the top wall. The top wall is provided with a through hole corresponding to the detection device. The front end of the first sleeve is located in the space enclosed by the top wall and the side wall, and the first hole is provided in the side wall.

[0013] Furthermore, the sidewall is provided with a lug, the first hole is provided in the lug, the first sleeve is provided with a receiving hole, and at least part of the lug is located in the receiving hole.

[0014] This application also provides an inspection device, including the partial discharge detection device described above.

[0015] The partial discharge detection device of this application includes a proximity switch. When the front cover stops moving after contacting the object being tested, the control device controls the power unit to stop according to the signal sent by the proximity switch, so as to reduce the interference caused by the power unit during the partial discharge detection process and improve the accuracy of the detection results. The front cover is rotatably connected to the telescopic device. When the front cover is subjected to local force, the front cover swings relative to the telescopic device to ensure the fit of the partial discharge detection device and improve the accuracy of the detection results. Attached Figure Description

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

[0017] Figure 2 yes Figure 1 The diagram shows a three-dimensional view of the partial discharge detection device, in which the telescopic device is in the extended state;

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

[0019] Figure 4 yes Figure 1 The diagram shows a cross-sectional view of the partial discharge detection device in contact with the object being tested. Only the front cover, connecting plate, spring, detection device, and proximity switch are shown.

[0020] Figure 5 is Figure 3 is a perspective view of a connecting piece of the partial discharge detection device shown in

[0021] Figure 6 is Figure 3 is a perspective view of a telescopic device of the partial discharge detection device shown in

[0022] Figure 7 is Figure 3 is a rear view of the first sleeve and the second sleeve of the partial discharge detection device shown in

[0023] Figure 8 is Figure 1 is a sectional view of the partial discharge detection device shown in DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments (or, the implementation manners) of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0025] If the application embodiments involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, 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 relationship, movement, etc. between the components in a certain posture (as shown in the drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. in the application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0026] The connection and fixation in the implementation manners of the present application include direct connection and direct fixation, and also include indirect connection and indirect fixation.

[0027] In the environment of machine rooms, factories, power distribution rooms, etc., manual patrol detection by workers has large error, is easy to miss detection, is difficult, and consumes a long time, and there are high-temperature, high-pressure, and electrical dangerous operation conditions. Therefore, various patrol inspection equipment suitable for such environments are developed on the market to replace manual operation. The patrol inspection equipment of the implementation manners of the present application includes a partial discharge detection device 100, which can perform discharge detection on electrical equipment such as electrical control cabinets.

[0028] The partial discharge detection device 100 has good working stability, can stably detect the current on the surface of the detected object 200 in the form of ultrasonic waves and ground electric waves, and has the characteristics of being detachable, maintainable, and replaceable when used as a part of a patrol inspection machine.

[0029] Reference Figures 1 to 4 The partial discharge detection device 100 according to the embodiment of the present application includes a power device 11, a telescopic device 2, a front cover 31, a detection device 32, a proximity switch 33, and a control device (not shown).

[0030] 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 the figure), and the front cover 31, the detection device 32, and the proximity switch 33 move along with the telescopic device 2. During partial discharge detection, the front cover 31 abuts against the object 200 to be detected, and the detection device 32 approaches the surface of the object 200 to be detected, and local discharge information is collected by using ground wave or ultrasonic detection technology.

[0031] When the front cover 31 contacts the object 200 to be detected, the detection device 32 is at a certain distance from the object 200 to be detected to ensure the insulation thickness between the detection device 32 and the object 200 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 it can be set according to actual needs.

[0032] 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.

[0033] 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.

[0034] In some embodiments, the front cover 31 is made of an insulating material to affect the accuracy of the partial discharge detection result.

[0035] In some embodiments, the partial discharge detection device 100 includes a first fixing member (not shown). The first fixing member is fixed to the front cover 31 and presses the detection device 32 to fix the detection device 32 on the front cover 31.

[0036] 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.

[0037] 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.

[0038] The partial discharge detection device 100 further includes a fixed seat 13, and the power device 11 and the speed change device 12 are fixed on the fixed seat 13.

[0039] When detection is required, the power device 11 drives the telescopic device 2 to extend. The telescopic device 2 extends with the front cover 31 and the detection device 32 until the front cover 31 fits against the surface of the object to be detected 200, and the detection device 32 performs detection. After the detection is completed, the power device 11 drives the telescopic device 2 to retract. The telescopic device 2 retracts with the front cover 31 and the detection device 32, and the inspection device moves to the next place where detection is required for the next detection.

[0040] The proximity switch 33 moves in the direction of approaching the object to be detected 200 along with the telescopic device 2. When the distance between the proximity switch 33 and the object to be detected 200 reaches the threshold, the proximity switch sends a signal to the control device, and the control device controls the power device 11 to stop. During the partial discharge detection process, the power device 11 is powered off to reduce the interference caused by the power device during the partial discharge detection and improve the accuracy of the detection result; at the same time, it can avoid the situation where an ordinary switch cannot be triggered, and can also avoid the telescopic device 2 continuing to extend and damaging the partial discharge detection device 100 after the front cover 31 contacts the object to be detected 200.

[0041] In some embodiments, the proximity switch 33 is fixed to the front cover 31, and the proximity switch 33 moves along with the front cover 31.

[0042] In some embodiments, the partial discharge detection device 100 includes a second fixing member (not shown). The second fixing member is fixed to the front cover 31 and presses the proximity switch 33 to fix the proximity switch 33 on the front cover 31.

[0043] In some embodiments, the sensing distance of the proximity switch 33 is greater than or equal to 1.5 mm and less than or equal to 2.5 mm. The present application does not limit the sensing distance of the proximity switch 33.

[0044] In some embodiments, the proximity switch 33 is an inductive proximity switch. When the partial discharge detection device 100 approaches the surface of the object to be detected 200, the inductive proximity switch starts to work and outputs a signal. After the control device receives the signal of the proximity switch, the power device 11 is powered off. The present application does not limit the type of the proximity switch 33.

[0045] See Figure 3 and Figure 5 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.

[0046] 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.

[0047] The connecting plate 42 includes a frame-shaped main body portion 421. The main body portion 421 defines 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, which is conducive to saving space.

[0048] In some embodiments, the connecting member 41 may also be integrally provided with the telescopic device 2.

[0049] 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.

[0050] 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.

[0051] Refer Figures 3 to 4 , in some embodiments, 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 to ensure that the front cover 31 can be reset after swinging. <000012​​​​​​​​​​​​​​​​​​​​​In some embodiments, the front cover 31 is axially connected to the telescopic device 2 to swing relative to the limit screw 34.

[0059] In some embodiments, the limiting screw 34 is fixed to the connecting plate 42.

[0060] In some embodiments, the limiting screw 34 and the first hole 311 are provided as at least a pair, with the pair of first holes 311 located on opposite sides of the front cover 31 to increase the smoothness of the front cover 31 when it swings.

[0061] In some embodiments, the partial discharge detection device 100 includes at least a telescopic sleeve 81, which can hide and protect components such as the telescopic device 2, and the telescopic sleeve 81 extends and retracts with the telescopic device 2.

[0062] In some embodiments, the telescopic sleeve 81 includes at least a first sleeve 811 and a second sleeve 812. The first sleeve 811 is fixed to the connecting plate 42. 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.

[0063] When the partial discharge detection device 100 is in use, after the power unit 11 receives the instruction, it outputs the torque to the telescopic device 2 through the speed change device to realize the synchronous extension and retraction of the telescopic sleeve 81, ensuring the accuracy of the transmission, and at the same time increasing the extension and retraction stroke of the telescopic sleeve 81.

[0064] In some embodiments, the second sleeve 812 is fixed and cannot be moved; the front end of the first sleeve 811 is fixed to the connecting plate 42 so that the first sleeve 811 extends and retracts with the connecting plate 42.

[0065] In some embodiments, the first sleeve 811 and the second sleeve 812 are made of carbon fiber, which reduces metal interference while also having high strength and hardness.

[0066] In some embodiments, the front cover 31 includes a top wall 312 and a side wall 313 extending from the top wall 312. The top wall 312 has a through hole 3121 corresponding to the detection device 32. The front end of the first sleeve 811 is located within the space enclosed by the top wall 312 and the side wall 313 to ensure the airtightness of the partial discharge detection device 100. The first hole 311 is provided in the side wall 313.

[0067] In some embodiments, a lug 314 is provided on the side wall 313, a first hole 311 is provided on the lug 314, and a receiving hole 8111 is provided on the first sleeve 8111. At least part of the lug 314 is located in the receiving hole 8111 to minimize the gap between the side wall 313 and the first sleeve 811, so as to ensure the airtightness of the partial discharge detection device 100.

[0068] Reference Figure 7 In some embodiments, the partial discharge detection device 100 includes a spacer 82 located between the first sleeve 811 and the second sleeve 812, which prevents the direct dry grinding between the first sleeve 811 and the second sleeve 812 and generates carbon powder, affecting the use.

[0069] In some embodiments, the spacer 82 is fixed to the rear end 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.

[0070] 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.

[0071] In Figure 7 it, four spacers 82 are provided, and the present application does not limit the number of spacers 82.

[0072] In some embodiments, the spacer 82 is fixed to the first sleeve 811. For example, it can be fixed by screws, welding, bonding or other methods.

[0073] In some embodiments, the spacer 82 is made of POM plastic (Poly Oxy Methylene polyformaldehyde resin).

[0074] Reference Figure 3 And Figure 6 as shown in, 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 follows the telescopic member 21 to extend and retract along the first direction.

[0075] In some embodiments, the telescopic member 21 is a multi-stage push rod, which has great improvements in the control of the accuracy of the telescopic amount and the total telescopic stroke, and realizes the universality for different scenarios; the present application does not limit the number of multi-stage push rods, which can be limited according to actual needs.

[0076] 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, and the connecting plate 42 is fixed to the first telescopic rod 211.

[0077] 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.

[0078] In some embodiments, the second sleeve 812 is fixed to the fixed rod 20 and cannot move.

[0079] Reference Figure 3 Figure 3 , in some embodiments, the partial discharge detection device 100 includes a controller board 61 and an elastic connection line 62 electrically connected to the controller board 61, and the control device is disposed on 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 brings the controller board 61 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 brings the controller board 61 to retract.

[0080] Reference Figure 8 Figure 8 , the telescopic device 2 is in a retracted state. When the partial discharge detection device 100 works, the power device 11 drives the telescopic device 2 to extend. The telescopic device 2 brings the front cover 31, the detection device 32, and the proximity switch 33 to extend together. After the front cover 31 contacts the object to be detected 200, the front cover 31, the detection device 32, and the proximity switch 33 stop moving, the power device 11 stops, and the detection device 32 starts the detection work; after the detection is completed, the inspection device moves backward along the second direction with the partial discharge detection device 100, the power device 11 starts and reverses to drive the telescopic device 2 to retract, and brings the front cover 31, the detection device 32, and the proximity switch 33 back to Figure 8 the state of

[0081] 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: The device includes a telescopic device, a power unit, a front cover, a detection device, a proximity switch, and a control device. The power unit drives the telescopic device to extend and retract in a first direction. The front cover is rotatably connected to the telescopic device to swing relative to it. The front cover, the detection device, and the proximity switch move with the telescopic device. When the front cover contacts the object being detected and stops moving, the control device controls the power unit to stop based on a signal sent by the proximity switch.

2. The partial discharge detection device according to claim 1, characterized in that, The proximity switch is fixed to the front cover.

3. The partial discharge detection device according to claim 1, characterized in that, The front cover has a first hole, and the partial discharge detection device includes a limiting screw assembled to the first hole. The limiting screw is fixed to the telescopic device, and the front cover swings relative to the limiting screw.

4. The partial discharge detection device according to claim 3, characterized in that, The telescopic device includes a telescopic component and a connecting plate fixed to the telescopic component. The connecting plate extends and retracts along the first direction following the telescopic component, and the limiting screw is fixed to the connecting plate.

5. The partial discharge detection device according to claim 4, characterized in that, The partial discharge detection device includes a spring located between the front cover and the connecting plate.

6. The partial discharge detection device according to claim 4, characterized in that, The telescopic device includes at least a first telescopic rod and a second telescopic rod. The first telescopic rod can extend and retract relative to the second telescopic rod along the first direction. The connecting plate is fixed to the first telescopic rod.

7. The partial discharge detection device according to any one of claims 4 to 6, characterized in that, The partial discharge detection device includes at least a first sleeve and a second sleeve. The first sleeve is fixed to the connecting plate. When the telescopic device extends and retracts, the first sleeve can move relative to the second sleeve. After the telescopic device retracts, the second sleeve is located inside the first sleeve.

8. The partial discharge detection device according to claim 7, characterized in that, The front cover includes a top wall and a side wall extending from the top wall. The top wall has a through hole corresponding to the detection device. The front end of the first sleeve is located in the space enclosed by the top wall and the side wall, and the first hole is located in the side wall.

9. The partial discharge detection device according to claim 8, characterized in that, The side wall is provided with a lug, the first hole is provided on the lug, the first sleeve is provided with a receiving hole, and at least part of the lug is located in the receiving hole.

10. An inspection device, characterized in that, Includes the partial discharge detection device as described in any one of claims 1 to 9.

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