Switch cabinet partial discharge monitoring device

Abstract

The invention relates to a partial discharge monitoring device for a switch cabinet, and belongs to the technical field of dielectric strength or breakdown voltage testing. Comprising a quadruped robot and a monitoring assembly. The monitoring assembly comprises an infrared imaging unit arranged above the supporting plate, an external UHF sensor, an electric control box and a monitoring unit storage and transfer assembly. The monitoring unit storage and transfer assembly comprises a storage cabinet and a mechanical arm, the storage cabinet is provided with a plurality of storage grooves which are horizontally arranged in an open mode, monitoring units are inserted into the storage grooves, the tail end of the mechanical arm is rotationally connected with a displacement claw, and the displacement claw is used for taking and placing the monitoring units into the storage grooves. According to the invention, multiple sets of detachable monitoring assembly units are carried, and when a partial discharge phenomenon of a certain switch cabinet is found, one monitoring unit can be taken down and magnetically attracted to the corresponding switch cabinet to monitor the switch cabinet for a long time so as to judge the partial discharge degree of the switch cabinet. After the monitoring unit is installed, the robot can go to other places for patrol and monitoring, and the maneuverability of the robot is not affected.

Description

Technical Field

[0001] The present invention belongs to the technical field of testing dielectric strength or breakdown voltage, and particularly relates to a partial discharge monitoring device for switchgear. Background Art

[0002] High-voltage switchgear is the most widely used and most numerous switchgear equipment. Due to various problems in aspects such as design, manufacturing, installation, and operation and maintenance, the accident rate is relatively high. Among various types of switchgear accidents, insulation accidents mostly occur in voltage levels of 10 kV and above, and the consequences are also very serious. Especially for draw-out switchgear, the insulation accident rate is even higher, and often when one switchgear has an accident, the phenomenon of affecting adjacent switchgear is more prominent.

[0003] During the daily use of high-voltage switchgear, partial discharge is the most common type of fault. Partial discharge in switchgear is a non-complete breakdown discharge phenomenon that occurs under the action of high voltage due to defects or aging of insulating materials, poor electrical connections, etc. This kind of discharge usually occurs at weak points of insulation, such as cable joints, insulator surfaces, or air gaps. Long-term partial discharge will gradually damage the insulating material, resulting in a decline in its insulation performance. In severe cases, it may lead to internal short circuit in the switchgear, triggering power system failures, and even causing equipment damage and power outages.

[0004] Partial discharge may also cause fires or explosions, posing a threat to personnel safety.

[0005] During partial discharge, a high-energy electron avalanche or plasma channel will be formed instantaneously. This process will generate electromagnetic wave radiation with a wide frequency spectrum, including signals in the ultra-high frequency band. UHF sensors can capture electromagnetic wave signals in the range of 300 MHz to 3 GHz. Signals in this frequency band can penetrate the enclosures of switchgear and other power equipment and be detected by externally installed sensors. Compared with electromagnetic waves of lower frequencies, signals in the UHF band are less affected by environmental noise and external interference. Therefore, using UHF sensors can improve the accuracy and reliability of detection.

[0006] In the prior art, UHF sensors are mostly used to monitor whether there is partial discharge inside the switchgear. In actual use, usually one UHF sensor is fixedly installed outside the switchgear, and UHF sensors need to be installed one by one for switchgear that needs to be monitored key points, resulting in a large consumption of UHF sensors and high costs.

[0007] In order to solve the above problems, China Patent discloses a switch cabinet partial discharge monitoring device with application number 202410818630.3, which includes: a chassis assembly, which is a cross-shaped box, and two pairs of traveling wheels are symmetrically arranged along the central axis; an obstacle crossing component, which includes a support plate horizontally attached along the front end face of the chassis assembly, and the front ends of the cantilevers on both sides of the front of the support plate are symmetrically provided with mounting holes along the central axis, and a transmission shaft is rotatably connected between the two mounting holes, and the ends of the transmission shaft are respectively axially symmetrically provided with foldable and unfoldable obstacle crossing mechanisms, an extension plate is convexly provided in the middle of the front of the support plate, and the transmission shaft is transmission-connected to the driving mechanism arranged on the extension plate; a monitoring mechanism, which includes a robot arm mounted on the top of the chassis assembly, and a partial discharge monitor is detachably clamped on the end face of the driving end of the robot arm; two auxiliary crawlers, which are symmetrically arranged along the central axis of the chassis assembly, and are used to assist the obstacle crossing mechanism to cross obstacles when it is unfolded. This patent uses a chassis assembly to drive the monitoring mechanism with a partial discharge monitor to move freely, so that one partial discharge monitor can monitor switch cabinets in multiple areas.

[0008] However, the monitoring mechanism in the patent moves with the chassis assembly. If a switch cabinet has a partial discharge, it can only stay there for a long time to monitor it, which restricts its mobility and makes it impossible to patrol and monitor other locations. Summary of the invention

[0009] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and provide a switch cabinet partial discharge monitoring device. The present invention carries multiple sets of detachable monitoring assembly units. When a switch cabinet is found to have partial discharge, a monitoring unit can be removed and magnetically attached to the corresponding switch cabinet for long-term monitoring to judge its partial discharge degree. After the monitoring unit is installed, it can patrol and monitor other locations without affecting its mobility.

[0010] The technical solution adopted by the present invention to solve the problems existing in the prior art is: A switch cabinet partial discharge monitoring device comprises a four-legged robot and a monitoring assembly detachably connected to the four-legged robot.

[0011] The monitoring assembly includes an infrared imaging unit, an external UHF sensor, an electric control box and a monitoring unit storage and transportation assembly arranged above a support plate, and the support plate is carried on the back of the quadruped robot.

[0012] The monitoring unit storage and transfer assembly includes a storage cabinet and a robotic arm. The storage cabinet is provided with a plurality of horizontally open storage slots, and monitoring units are inserted into the storage slots. The end of the robotic arm is rotatably connected to a displacement claw, and the displacement claw is used to take and place the monitoring unit into the storage slot.

[0013] Preferably, the monitoring unit comprises a shell, inside of which a built-in UHF sensor, a control module and a power supply module which are electrically connected to each other are arranged.

[0014] Preferably, a charging plug is provided inside the storage slot, and a charging socket electrically connected to the power module is provided on the rear wall of the shell, and the charging socket is cooperatively connected with the charging plug.

[0015] Preferably, a switch electrically connected to the control module is provided on the side wall of the shell, and beveled edges are provided on both sides of the opening of the storage slot. When the monitoring unit is inserted into the storage slot, the switch is pressed inwardly under the guidance of the beveled edges to turn off the power to the built-in UHF sensor.

[0016] Preferably, a first magnet is disposed on the front end surface of the shell, and a second magnet is disposed on the bottom of the shell.

[0017] A magnetic rod is provided at one end of the straight plate of the displacement claw facing the monitoring unit, and the magnetic rod is cooperatively connected with the first magnet.

[0018] Preferably, two magnetic rods are symmetrically arranged on the straight plate, and two first magnets are arranged at intervals on the front end surface of the shell.

[0019] A second telescopic mechanism is fixed to one end of the straight plate away from the monitoring unit, and the end of the telescopic rod of the second telescopic mechanism passes through the through hole on the straight plate.

[0020] Preferably, the infrared imaging unit comprises an infrared imager and an infrared imager bracket, and the infrared imager is detachably arranged on the top of the infrared imager bracket.

[0021] Preferably, the infrared imager bracket includes a mounting frame, a rotating rod and a base column, the infrared imager is detachably connected to the mounting frame, the mounting frame is rotatably connected to the rotating rod, the rotating rod is rotatably connected to the base column, and the rotation axis of the mounting frame and the rotation axis of the rotating rod are arranged perpendicular to each other.

[0022] Preferably, a first bevel gear is coaxially provided on the outer side of the mounting frame rotating shaft, a dual output shaft driving mechanism is fixed on the rotating rod, a second bevel gear is provided at the end of one output shaft of the dual output shaft driving mechanism, the second bevel gear is meshingly connected with the first bevel gear, and a driving gear is provided at the other output shaft end of the dual output shaft driving mechanism.

[0023] The base is sleeved with a passive gear, and the active gear is meshed and connected with the passive gear.

[0024] Preferably, a spline area is vertically arranged on the bottom column, the passive gear is slidably arranged in the spline area, and a first telescopic mechanism is fixed on the bottom column, and the first telescopic mechanism controls the up and down movement of the passive gear.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Multiple monitoring units and external UHF sensors can be used in cooperation to quickly locate the switchgear with partial discharge, and a monitoring unit can be placed on the switchgear to continuously monitor the partial discharge situation of the switchgear. After completing the above work, the next location can be inspected, improving the inspection efficiency.

[0026] (2) It is equipped with an infrared imager that can swing up, down, left and right, which can monitor the temperature field in each area of the power distribution room without dead ends, find high-temperature areas, and send out alarm signals, facilitating quick maintenance and eliminating potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the drawings and embodiments.

[0028] Figure 1 is a structural diagram of a partial discharge monitoring device for a switchgear of the present application, Figure 2 is a first structural diagram of a monitoring module in a partial discharge monitoring device for a switchgear of the present application, Figure 3 is a second structural diagram of the monitoring module of the present application, Figure 4 is a structural diagram of an infrared imaging unit in a partial discharge monitoring device for a switchgear of the present application, Figure 5 is a structural diagram of a support for an infrared imaging instrument in a partial discharge monitoring device for a switchgear of the present application, Figure 6 is Figure 5 a cross-sectional view of Figure 7 is Figure 5 a structural diagram of a dual-output shaft power unit in Figure 8 is a structural diagram of a monitoring unit storage and transportation assembly in a partial discharge monitoring device for a switchgear of the present application, Figure 9 is a structural diagram of a storage cabinet in a partial discharge monitoring device for a switchgear of the present application, Figure 10 is Figure 9 a front view of Figure 11 is a structural diagram of a monitoring unit in a partial discharge monitoring device for a switchgear of the present application, Figure 12 isFigure 11 Bottom view of Figure 13 is Figure 11 exploded view of Figure 14 This is the structure diagram of the displacement claw in a partial discharge monitoring device for a switch cabinet of the present application.

[0029] In the figure: 1 - infrared imager, 2 - mounting rack, 201 - first bevel gear, 3 - rotating rod, 4 - bottom column, 401 - spline area, 5 - double-output shaft drive mechanism, 6 - second bevel gear, 7 - driving gear, 8 - driven gear, 9 - slip ring, 10 - connecting rod, 11 - first telescopic mechanism, 12 - storage cabinet, 1201 - storage slot, 1202 - hypotenuse, 1203 - charging plug, 13 - monitoring unit, 1301 - housing, 13011 - magnet mounting groove, 13012 - positioning groove, 1302 - built-in UHF sensor, 1303 - control module, 1304 - power module, 1305 - upper cover plate, 1306 - switch, 1307 - first magnet, 1308 - second magnet, 14 - displacement claw, 1401 - straight plate, 1402 - U-shaped frame, 1403 - magnetic attraction rod, 1404 - second telescopic mechanism, 1405 - telescopic rod, 1406 - mounting post, 15 - robotic arm, 1501 - base, 1502 - first straight arm, 1503 - second straight arm, 1504 - end straight arm, 16 - external UHF sensor, 17 - electric control box, 18 - support plate, 19 - quadruped robot. Detailed implementation manners

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the embodiments of the present application belong. The terms used herein are only for the purpose of describing specific implementation manners and are not intended to limit the embodiments of the present application.

[0031] In addition, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used in the description of the specification and claims of the present invention to describe various exemplary structural parts and elements of the present invention. However, these terms are used herein only for the convenience of description and are determined based on the exemplary orientations shown in the drawings. Therefore, these terms indicating directions should only be regarded as illustrative and not as restrictive. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0032] The following further describes in detail a partial discharge monitoring device for a switch cabinet of the present invention with reference to the accompanying drawings.

[0033] Consisting of Figures 1 to 14As shown in the figure, it includes a quadruped robot 19 and a monitoring assembly detachably connected to the quadruped robot 19. The quadruped robot 19 is a prior art, and it can adopt the Aliengo series or B1 series of Unitree Technology or quadruped robots of other companies. There are multiple external interfaces on the quadruped robot 19, which can provide power supply, data remote transmission function and other expansion functions for the monitoring assembly.

[0034] Consisting of Figure 2 and Figure 3 As shown in the figure, the monitoring assembly includes an infrared imaging unit, an external UHF sensor 16, an electric control box 17 and a monitoring unit storage and transfer assembly arranged above the support plate 18. The monitoring unit storage and transfer assembly, the infrared imaging unit and the external UHF sensor 16 are all electrically connected to the electric control box 17. The support plate 18 is mounted on the back of the quadruped robot 19, and an installation mechanism matching the back card slot and screw holes of the quadruped robot 19 is designed on the support plate 18, and it is fixedly connected to the quadruped robot 19 by means of snap connection and bolt thread connection.

[0035] The monitoring unit storage and transfer assembly includes a storage cabinet 12 and a robotic arm 15. There are several horizontally open storage slots 1201 on the storage cabinet 12, and a monitoring unit 13 is inserted inside the storage slot 1201. A displacement claw 14 is rotatably connected to the end of the robotic arm 15, and the displacement claw 14 is used to pick up and place the monitoring unit 13 inside the storage slot 1201.

[0036] If it is found that there is a partial discharge in a certain switch cabinet, a monitoring unit 13 inside the storage cabinet 12 can be taken out by the robotic arm 15 and placed on the corresponding switch cabinet to monitor the partial discharge situation of the switch cabinet in real time.

[0037] The robotic arm 15 also adopts the prior art, including a base 1501, a first straight arm 1502, a second straight arm 1504 and a terminal straight arm 1504 connected in sequence. The base 1501 can rotate freely. Both ends of the first straight arm 1502 are rotatably connected to the base 1501 and the second straight arm 1504 respectively. The terminal straight arm 1504 is rotatably connected to the second straight arm 1503, and the joint of the terminal straight arm 1504 and the displacement claw 14 can rotate, which is convenient for adjusting the direction of the displacement claw 14.

[0038] In order to expand the placement area of the monitoring unit 13, both the first straight arm 1502 and the second straight arm 1503 adopt electric telescopic rods.

[0039] Consisting of Figures 11 to 13As shown, the monitoring unit 13 includes a housing 1301, and a built-in UHF sensor 1302, a control module 1303, and a power module 1304 are provided inside the housing 1301. In order to avoid maintenance, the housing 1301 is a rectangular parallelepiped, and its upper end is open. The open part is covered with an upper cover plate 1305 fixedly connected by bolts, and the upper cover plate 1305 is provided with a plurality of heat dissipation holes.

[0040] In order to facilitate the placement and removal of the monitoring unit 13 and fix the monitoring unit 13 on the outer wall of the switch cabinet, the front end surface of the shell 1301 is recessed with a magnet mounting groove 13011, the magnet mounting groove 13011 is provided with a first magnet 1307, and the bottom of the shell 1301 is provided with a second magnet 1308.

[0041] A magnetic rod 1403 is disposed at one end of the straight plate 1401 of the displacement claw 14 facing the monitoring unit 13 , and the magnetic rod 1403 is cooperatively connected with the first magnet 1307 .

[0042] In order to grasp more firmly, the front end surface of the shell 1301 is provided with two first magnets 1307 arranged at intervals.

[0043] Depend on Figure 14 As shown, two magnetic rods 1403 are symmetrically arranged on the straight plate 1401, and a second telescopic mechanism 1404 is fixed to one end of the straight plate 1401 away from the monitoring unit 13, and the end of the telescopic rod 1405 of the second telescopic mechanism 1404 passes through the through hole on the straight plate 1401. The straight plate 1401 fixes the second telescopic mechanism 1404 through a U-shaped frame 1402, and a mounting column 1406 is fixed to one side of the U-shaped frame 1402 away from the straight plate 1401, and the mounting column 1406 is connected to the rotating part of the end straight arm 1504.

[0044] When the monitoring unit 13 needs to be grabbed, the magnetic rod 1403 is aligned with the first magnet 1307. After the two are attracted, the monitoring unit 13 is pulled out from the storage slot 1201. Then the displacement claw 14 is rotated so that the second magnet 1308 is opposite to the outer wall of the switch cabinet and is magnetically attracted to the outer wall of the switch cabinet, and the placement of the monitoring unit 13 is completed.

[0045] The magnetic field strength of the first magnet 1307 is greater than the magnetic field strength of the second magnet 1308 because the first magnet 1307 has a greater attraction force. When the monitoring unit 13 needs to be recovered, the magnetic attraction rod 1403 is also aligned with the first magnet 1307, and the two are attracted. Since the attraction force of the first magnet 1307 is strong, when the magnetic attraction rod 1403 is attracted to the first magnet 1307, the robotic arm 15 moves and the monitoring unit 13 can be directly removed.

[0046] After the monitoring unit 13 is placed in the storage slot 1201 or on the switch cabinet, the telescopic rod 1405 can be extended, and the telescopic rod 1405 abuts against the inside of the positioning slot 13012 of the housing 1301. During this process, the displacement claw 14 moves backward, realizing the separation of the first magnet 1302 and the magnetic attraction rod 1403.

[0047] To ensure that the monitoring unit 13 has sufficient power, when the monitoring unit 13 is placed inside the storage slot 1201, it needs to be charged in a timely manner. To achieve this purpose, in this embodiment, a charging plug 1203 is provided inside the storage slot 1201, and a charging jack 1309 electrically connected to the power module 1304 is provided on the rear wall of the housing 1301. The charging jack 1309 is cooperatively connected with the charging plug 1203.

[0048] When the monitoring unit 13 is placed inside the storage slot 1201, the built-in UHF sensor 1302 needs to be turned off. Therefore, a switch 1306 electrically connected to the control module 1303 is provided on the side wall of the housing 1301. Hypotenuses 1202 are provided on both sides of the open end of the storage slot 1201. When the monitoring unit 13 is inserted into the storage slot 1201, under the guidance of the hypotenuses 1202, the switch 1306 is pressed inward to turn off the power supply to the built-in UHF sensor 1302.

[0049] To achieve precise grasping and placement of the displacement claw 14, a camera is provided on the displacement claw 14, and image recognition technology is used to determine the relative position between the displacement claw 14 and the monitoring unit 13.

[0050] The infrared imaging unit includes an infrared imager 1 and an infrared imager bracket. The infrared imager 1 is detachably arranged on the top of the infrared imager bracket.

[0051] The infrared imager bracket includes a mounting frame 2, a rotating rod 3, and a bottom column 4. The infrared imager 1 is detachably connected to the mounting frame 2. The mounting frame 2 is rotatably connected to the rotating rod 3, and the rotating rod 3 is rotatably connected to the bottom column 4. The rotation axis of the mounting frame 2 and the rotation axis of the rotating rod 3 are arranged perpendicular to each other.

[0052] A first bevel gear 201 is coaxially provided outside the rotating shaft of the mounting frame 2. A double-output shaft drive mechanism 5 is fixed on the rotating rod 3. A second bevel gear 6 is provided at the end of one output shaft of the double-output shaft drive mechanism 5. The second bevel gear 6 is meshed with the first bevel gear 201. A driving gear 7 is provided at the end of the other output shaft of the double-output shaft drive mechanism 5. A driven gear 8 is sleeved on the base 4. The driving gear 7 is meshed with the driven gear 8.

[0053] On the bottom column 4, there is a vertically arranged spline area 401. The driven gear 8 is slidably arranged in the spline area 401. A first telescopic mechanism 11 is fixed on the bottom column 4, and the first telescopic mechanism 11 controls the up and down movement of the driven gear 8.

[0054] Due to the limited area of the driven gear 8, it is relatively difficult for the telescopic rod of the first telescopic mechanism 11 to contact the driven gear 8. Therefore, in this embodiment, a sliding ring 9 that slides up and down is sleeved on the bottom column 4. The sliding ring 9 is fixedly connected to the driven gear 8 through a connecting rod 10, and the telescopic rod of the first telescopic mechanism 11 is fixedly connected to the bottom of the sliding ring 9.

[0055] The driving component of the double output shaft driving mechanism 5 is a motor. After starting, the second bevel gear 6 drives the first bevel gear 201 to rotate, thereby causing the camera of the infrared imager 1 to swing up and down. Control the telescopic rod of the first telescopic mechanism 11 to move upward, push the driven gear 8 to move upward, and engage with the driving gear 7. Since the bottom column 4 is fixed, when the driving gear 7 rotates, it can drive the rotating rod 3 to rotate, and then drive the infrared imager 1 to swing left and right.

[0056] Through the design of the above structure, by using one motor and the first telescopic mechanism 11, the infrared imager 1 can be driven to complete the left-right and up-down swings, changing the previous driving method of two motors and reducing the cost.

[0057] During the inspection of the power distribution room, three or four monitoring units 13 can be arranged in the power distribution room first. These monitoring units 13 are arranged on the switch cabinets at the corners. Then the quadruped robot 19 patrols inside the power distribution room according to the set trajectory. Because the monitoring range of the HUF sensor is limited, in this way, through the external HUF sensor 16 carried on the quadruped robot 19 and the three to four monitoring units 13 arranged in advance, the entire power distribution room can be covered.

[0058] At the same time, according to the time difference of the electromagnetic wave signals monitored by each monitoring unit 13 and the external UHF sensor 16, the position of the switch cabinet with partial discharge can be analyzed. The quadruped robot 19 walks to the switch cabinet and places the monitoring unit 13 on the outer wall of the switch cabinet for real-time monitoring.

[0059] After completing the inspection of the entire power distribution room, the monitoring units 13 arranged in advance at the corners are recovered, and the monitoring units 13 on the switch cabinets with partial discharge are left to continue the inspection of the next power distribution room or other areas.

[0060] The embodiments of the present invention have been described in detail above with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present invention pertains, various changes can be made without departing from the purpose of the present invention.

Claims

1. A partial discharge monitoring device for a switchgear cabinet, characterized in that: It includes a quadruped robot (19) and a monitoring assembly detachably connected to the quadruped robot (19); The monitoring assembly includes an infrared imaging unit, an external UHF sensor (16), an electric control box (17), and a monitoring unit storage and transfer assembly arranged above a support plate (18), and the support plate (18) is carried on the back of the quadruped robot (19); The monitoring unit storage and transfer assembly includes a storage cabinet (12) and a robotic arm (15). The storage cabinet (12) is provided with a number of horizontally open storage slots (1201). A monitoring unit (13) is inserted into the storage slot (1201). The end of the robotic arm (15) is rotatably connected to a displacement claw (14), and the displacement claw (14) is used to pick up and place the monitoring unit (13) into and out of the storage slot (1201).

2. The partial discharge monitoring device for a switchgear cabinet according to claim 1, characterized in that: The monitoring unit (13) includes a housing (1301), and an internal UHF sensor (1302), a control module (1303), and a power module (1304) that are electrically connected to each other are arranged inside the housing (1301).

3. The partial discharge monitoring device for a switchgear cabinet according to claim 2, characterized in that: A charging plug (1203) is arranged inside the storage slot (1201), and a charging jack (1309) electrically connected to the power module (1304) is arranged on the rear wall of the housing (1301), and the charging jack (1309) is cooperatively connected with the charging plug (1203).

4. The partial discharge monitoring device for a switchgear cabinet according to claim 2 or 3, characterized in that: A switch (1306) electrically connected to the control module (1303) is arranged on the side wall of the housing (1301), and inclined edges (1202) are arranged on both sides of the open end of the storage slot (1201). When the monitoring unit (13) is inserted into the storage slot (1201), under the guidance of the inclined edges (1202), the switch (1306) is pressed inward to turn off the power supply to the internal UHF sensor (1302).

5. The partial discharge monitoring device for a switchgear cabinet according to claim 2 or 3, characterized in that: A first magnet (1307) is arranged on the front end face of the housing (1301), and a second magnet (1308) is arranged at the bottom of the housing (1301); A magnetic attraction rod (1403) is arranged at one end of the straight plate (1401) of the displacement claw (14) facing the monitoring unit (13), and the magnetic attraction rod (1403) is cooperatively connected with the first magnet (1307).

6. The partial discharge monitoring device for a switchgear cabinet according to claim 5, characterized in that: Two magnetic attraction rods (1403) are symmetrically arranged on the straight plate (1401), and two first magnets (1307) arranged at intervals are arranged on the front end face of the housing (1301); One end of the straight plate (1401) facing away from the monitoring unit (13) is fixed with a second telescopic mechanism (1404), and the end of the telescopic rod (1405) of the second telescopic mechanism (1404) passes through the through hole on the straight plate (1401).

7. A partial discharge monitoring device for a switch cabinet according to claim 1 or 2 or 3 or 6, characterized in that: The infrared imaging unit includes an infrared imager (1) and an infrared imager bracket, and the infrared imager (1) is detachably arranged on the top of the infrared imager bracket.

8. A partial discharge monitoring device for a switch cabinet according to claim 7, characterized in that: The infrared imager bracket includes a mounting frame (2), a rotating rod (3) and a bottom column (4). The infrared imager (1) is detachably connected to the mounting frame (2). The mounting frame (2) is rotatably connected to the rotating rod (3). The rotating rod (3) is rotatably connected to the bottom column (4). The rotation axis of the mounting frame (2) and the rotation axis of the rotating rod (3) are arranged perpendicular to each other.

9. A partial discharge monitoring device for a switch cabinet according to claim 8, characterized in that: A first bevel gear (201) is coaxially arranged outside the rotating shaft of the mounting frame (2). A double-output shaft drive mechanism (5) is fixed on the rotating rod (3). A second bevel gear (6) is arranged at the end of one output shaft of the double-output shaft drive mechanism (5). The second bevel gear (6) is meshed and connected with the first bevel gear (201). A driving gear (7) is arranged at the end of the other output shaft of the double-output shaft drive mechanism (5); A driven gear (8) is sleeved on the base (4), and the driving gear (7) is meshed and connected with the driven gear (8).

10. A partial discharge monitoring device for a switch cabinet according to claim 9, characterized in that: A spline area (401) arranged vertically is provided on the bottom column (4). The driven gear (8) is slidably arranged in the spline area (401). A first telescopic mechanism (11) is fixed on the bottom column (4), and the first telescopic mechanism (11) controls the up and down movement of the driven gear (8).

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