Partial discharge detection device for power cable inspection
By designing a partial discharge detection device with a handheld probe and a water-cooling system, the problem of inflexible operation of power cable testing equipment in complex environments was solved, and flexible and accurate partial discharge detection was achieved.
Patent Information
- Application Number
- CN202510857773.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-25
- Publication Date
- 2025-11-18
AI Technical Summary
Existing partial discharge detection equipment for power cables is inflexible in humid, narrow, and hot environments, and fixed probes cannot adapt to complex detection scenarios, resulting in inconvenience in detection.
A partial discharge detection device was designed, comprising a storage box, a handheld probe, an ultrasonic detector, a battery, and heat dissipation components. The handheld probe enables flexible detection through a telescopic rod and an arc-shaped bracket, and is adapted to complex environments by combining a water-cooling heat dissipation system.
It enables flexible and accurate partial discharge detection in narrow, humid, and hot environments, improving the adaptability and ease of operation of the detection equipment.
Smart Images
Figure CN120971902A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of power cable inspection, in particular to a partial discharge detection device for power cable inspection. BACKGROUND
[0002] Power cable is a cable for transmitting and distributing electric energy, and is often used in urban underground power grid, power station outgoing line, internal power supply of industrial and mining enterprises and underwater power transmission line across rivers and seas. Power cable is a cable product used for transmitting and distributing high-power electric energy in the main line of the power system, including power cables of various voltage levels and various insulations. Partial discharge is defined as a partial non-through discharge phenomenon occurring in the internal insulation of the cable under the action of a high electric field, usually caused by insulation defects such as bubbles, impurities, cracks, etc. Hazards: Long-term partial discharge can accelerate insulation aging, leading to insulation breakdown, short circuit and even fire accidents.
[0003] During the use of power cables, partial discharge phenomena will inevitably occur due to various reasons, and this phenomenon will accelerate insulation aging, leading to insulation breakdown, short circuit and even fire accidents, so it is necessary to monitor the partial discharge of the cable. When this phenomenon occurs, the power staff will conduct a temporary inspection to determine and perform subsequent power operations. At this time, a temporary inspection device is needed, and the ultrasonic detection method is usually used. However, the installation and use of power cables are mostly in cramped and humid places such as pre-buried wells, underground trenches and cable tunnels. Due to the special environment, there will be certain humid and hot conditions, and the detection environment is complex, which poses a certain challenge and threat to the use of detection equipment. In addition, some integrated phased array ultrasonic probes are fixed in structure, which makes the operation not flexible enough and cannot be used flexibly in these scenes, thereby causing certain inconvenience. Therefore, a partial discharge detection device for power cable inspection is proposed. SUMMARY
[0004] The present application aims to provide a partial discharge detection device for power cable inspection, which aims to solve
[0005] The above technical problem is solved by the following technical solution: the present application proposes the following technical solution: a partial discharge detection device for power cable inspection, comprising a storage box, the inside of the storage box is provided with an ultrasonic detector, the outside of the storage box is movably connected with a handheld probe, the inside of the storage box is provided with a containing space for accommodating the handheld probe, the side of the storage box is provided with a storage battery, the bottom of the storage box is provided with a heat dissipation member, and the side wall of the storage box is provided with a sandwich layer.
[0006] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the inside of the storage box is provided with a partition plate, the ultrasonic detector is located below the partition plate, the handheld probe can be stored above the partition plate, the top of the storage box is provided with a flip cover, the outer wall of the flip cover is provided with an external interface, the bottom of the external interface is provided with a cable, the bottom of the cable penetrates through the partition plate and is connected with the ultrasonic detector, and the bottom of the storage box is provided with a containing groove.
[0007] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the handheld probe includes a flexible cable, the bottom of the flexible cable is provided with a connector, the connector is connected with the external interface, the top of the flexible cable is provided with a handle, the top of the handle is provided with an extension rod, and the top of the extension rod is provided with a detection structure.
[0008] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the detection structure includes a detection table arranged at the top of the extension rod, the inside of the detection table is hollow, the inside of the detection table is provided with a motor, the output shaft of the motor is provided with a worm, the side of the worm is provided with a worm gear, the outer wall of the worm gear is provided with a driving cable, the top of the detection table is provided with an arc-shaped support, both ends of the arc-shaped support are provided with through holes, the through holes penetrate through the arc-shaped support, the number of the arc-shaped supports is plural, the plural arc-shaped supports are connected in a head-to-tail mode to form a connecting piece which can be bent, the driving cable extends away from the detection table through the through holes, an ultrasonic phased array probe is arranged at one end of the arc-shaped support away from the detection table, the ultrasonic phased array probe is provided with a passive cable on the side away from the driving cable, the passive cable extends towards the detection table through the through holes, the bottom of the passive cable is provided with a winding roller, the bottom of the passive cable is wound on the outer wall of the winding roller, the winding roller is arranged in the inside of the detection table, and the side of the winding roller is provided with an elastic piece.
[0009] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the heat dissipation member includes a water pump arranged in the containing groove, the input end of the water pump is provided with a water inlet pipe, one end of the water inlet pipe away from the water pump is provided with a water storage box, the water inlet pipe is in communication with the water storage box, the side of the water storage box is provided with a water supplement pipe, the water storage box is in communication with the water supplement pipe, one end of the water supplement pipe away from the water storage box is provided with a threaded mounting seat, the bottom of the threaded mounting seat is in communication with the water supplement pipe, the output end of the water pump is provided with a circulating water pipe, one end of the circulating water pipe away from the water pump is connected with the water storage box, and the circulating water pipe is in communication with the water storage box.
[0010] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the heat dissipation member further comprises a first heat conduction plate arranged on the side of the water pump, the outer wall of the first heat conduction plate is wrapped with a first cooling water pipe, the first cooling water pipe is connected with the circulating water pipe, the side of the circulating water pipe is provided with a second cooling water pipe, the second cooling water pipe is connected with the circulating water pipe, the side of the second cooling water pipe is provided with a second heat conduction plate, and the second heat conduction plate is arranged in the interlayer, and the interlayer is provided with an exhaust structure.
[0011] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the exhaust structure comprises an inner recess frame arranged on the side of the interlayer, an exhaust valve arranged in the inner recess frame, an exhaust pipe arranged on the side of the exhaust valve, and the exhaust valve is connected with the exhaust pipe.
[0012] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the side of the inner recess frame is provided with an exhaust window, the side of the exhaust window is provided with an exhaust fan, and the upper side of the threaded mounting seat is provided with a snap ring.
[0013] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the side of the storage box is provided with a display screen.
[0014] As a preferred embodiment of the partial discharge detection device for power cable inspection of the present application: the top of the storage box is provided with a shoulder strap, and the side of the storage box away from the display screen is provided with a flexible backboard.
[0015] The beneficial effects of the present application are that the device uses a handheld probe to detect power lines, the telescopic rod drives the detection structure to extend to a detection position that cannot be reached by the staff, and the detection structure can flexibly change the detection angle of the detection element to obtain more accurate detection results. The device detects in a closed state, and the heat dissipation member can adapt to narrow, hot and humid environments. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not a limitation on the present application. Among them:
[0017] Figure 1 The structural schematic diagram of the overall structure in the present application.
[0018] Figure 2It is a side view of the storage box in the application.
[0019] Figure 3 It is a structure diagram of the handheld probe in the application.
[0020] Figure 4 It is a structure diagram of the arc-shaped support in the application.
[0021] Figure 5 It is a structure diagram of the detection structure in the application.
[0022] Figure 6 It is a structure diagram of the winding roller in the application.
[0023] Figure 7 It is a structure diagram of the heat dissipation member in the application.
[0024] Figure 8 It is a structure diagram of the exhaust structure in the application.
[0025] Figure 9 It is a structure diagram of the flexible backboard in the application. DETAILED DESCRIPTION
[0026] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and the accompanying drawings.
[0027] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but these terms can be changed according to the intention of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.
[0028] REFERENCE Figures 1-9 The present embodiment provides a partial discharge detection device for power cable 14 inspection, which comprises a storage box 1, the inside of the storage box 1 is provided with an ultrasonic detector 2, the outside of the storage box 1 is movably connected with a handheld probe 3, the inside of the storage box 1 is provided with a containing space for containing the handheld probe 3, the handheld probe 3 can be contained in the storage box 1 or externally connected to the storage box 1 for detection, the side of the storage box 1 is provided with a storage battery 4, the storage battery 4 provides power for the whole device, the bottom of the storage box 1 is provided with a heat dissipation member 5, the heat dissipation member 5 can dissipate heat for the circuits, detectors and the like in the inside of the storage box 1 during the detection of the device, and the side wall of the storage box 1 is provided with a sandwich layer 16.
[0029] Further, the inside of the storage box 1 is provided with a partition plate 11, the ultrasonic detector 2 is located below the partition plate 11, the handheld probe 3 can be stored above the partition plate 11, the top of the storage box 1 is provided with a flip cover 12, the outer wall of the flip cover 12 is provided with an external interface 13, preferably, a sealing element is arranged between the flip cover 12 and the storage box 1, which is sealed when the flip cover 12 covers the storage box 1, which can prevent the components inside the storage box 1 from being damp, and the external interface 13 is a waterproof BNC connector, the bottom of the external interface 13 is provided with a cable 14, the bottom of the cable 14 penetrates the partition plate 11 and is connected with the ultrasonic detector 2, the top of the cable 14 is electrically connected with the external interface 13, when detecting, the handheld probe 3 is connected with the external interface 13, which can be connected with the ultrasonic detector 2 through the cable 14, and the bottom of the storage box 1 is provided with a receiving groove 15.
[0030] Further, the handheld probe 3 includes a flexible cable 31, the bottom of the flexible cable 31 is provided with a connecting head 32, the connecting head 32 is connected with the external interface 13, preferably, when the power line is detected, the connecting head 32 of the handheld probe 3 is connected with the external interface 13 after the handheld probe 3 is taken out of the storage box 1, and then the handheld probe 3 can work, the top of the flexible cable 31 is provided with a handle 33, the top of the handle 33 is provided with an extension rod 34, the top of the extension rod 34 is provided with a detection structure 35, the handheld probe 3 can conveniently send the detection structure 35 to the detection point which is inconvenient for the worker to reach, such as narrow and low place, and the detection structure 35 can flexibly adjust the position of the detection element to adapt to more complex detection environment.
[0031] Further, the side of the storage box 1 is provided with a display screen 17, which displays detection data, the display screen 17 can conveniently read out the detection result for the worker, the top of the storage box 1 is provided with a shoulder strap 18, the side of the storage box 1 away from the display screen 17 is provided with a flexible back plate 19, the flexible back plate 19 is arranged on the side of the storage box 1 which directly contacts the worker, the flexible back plate 19 contacts the worker, which reduces the discomfort of the worker when carrying the device.
[0032] Use process: when in use, the worker carries the storage box 1 through the shoulder strap 18, moves to the working position, and then opens the flip cover 12, takes out the handheld probe 3, and connects the connecting head 32 at the bottom of the flexible cable 31 of the handheld probe 3 with the external interface 13 at the top of the flip cover 12, at this time, the handheld probe 3 can be used to detect the power line, the display screen 17 displays the detection data, and the worker can directly read out the detection result, the storage box 1 and the external interface 13 of the device can be waterproof sealed, and the device is provided with a built-in heat dissipation structure for heat dissipation, so the device can adapt to hot and humid working environment.
[0033] Embodiment 2, refer to Figures 1-9For the second embodiment of the present application, unlike the previous embodiment, this embodiment illustrates how the detection structure 35 performs detection work outside the storage box 1. The detection structure 35 includes a detection table 351 arranged at the top of the telescopic rod 34. The telescopic rod 34 can be extended to drive the detection structure 35 to extend far away to detect areas that are difficult for workers to reach, such as narrow areas. The inside of the detection table 351 is hollow. The inside of the detection table 351 is provided with a motor 352. The output shaft of the motor 352 is provided with a worm 353. The side of the worm 353 is provided with a worm wheel 354. The outer wall of the worm wheel 354 is provided with a driving cable 355. The driving cable 355 is wound around the outer wall of the worm wheel 354. The rotation of the motor 352 drives the rotation of the worm 353, which in turn drives the rotation of the worm wheel 354, thereby tightening or loosening the driving cable 355. The top of the detection table 351 is provided with an arc-shaped support 356. Both ends of the arc-shaped support 356 are provided with through holes 357. The through holes 357 pass through the arc-shaped support 356. The number of arc-shaped supports 356 is multiple. The multiple arc-shaped supports 356 are connected end to end to form a flexible connecting piece. The adjacent arc-shaped supports 356 can rotate relative to each other. The driving cable 355 passes through the through holes 357 and extends away from the detection table 351. The end of the arc-shaped support 356 away from the detection table 351 is provided with an ultrasonic phased array probe 358. The arc-shaped support 356 and the ultrasonic phased array probe 358 can rotate relative to each other. The top of the driving cable 355 is connected to the ultrasonic phased array probe 358. Figure 4As shown, when the active cable 355 is tightened, the ultrasonic phased array probe 358 will be deflected towards the detection table 351 from the side of the active cable 355, and the arc-shaped support 356 will be twisted as a whole, changing the detection direction of the ultrasonic phased array probe 358, and the detection position can be flexibly adjusted to make the detection more accurate. The side of the ultrasonic phased array probe 358 away from the active cable 355 is provided with a passive cable 359, which extends towards the detection table 351 through the through hole 357. The bottom of the passive cable 359 is provided with a winding roller 360, and the bottom of the passive cable 359 is wound on the outer wall of the winding roller 360. The winding roller 360 is arranged in the inside of the detection table 351, and the side of the winding roller 360 is provided with an elastic element 361. Preferably, the elastic element 361 is a torsion spring, which is in a compressed state and applies a torque to the winding roller 360. The winding roller 360 applies tension to the passive cable 359, so that the passive cable 359 is always in a tensioned state. When the worm gear 354 rotates to deflect the probe towards the direction of the active cable 355, the winding roller 360 is passively elongated to the passive cable 359, and the elastic element 361 is further compressed. When the worm 353 reverses to loosen the active cable 355, the elastic element 361 will tighten the passive cable 359 with the winding roller 360, and the probe and the arc-shaped support 356 will be deflected towards the direction of the passive cable 359.
[0034] Use process: when detecting power lines in narrow and narrow places such as embedded wells, underground trenches and cable 14 tunnels, connect the connector 32 at the bottom of the flexible cable 31 of the handheld probe 3 to the external interface 13 at the top of the flip cover 12, and use the handheld probe 3 to detect the power lines. The telescopic rod 34 will drive the detection structure 35 to extend to the detection position that the staff cannot reach, and the detection structure 35 can flexibly change the detection angle of the detection element to obtain more accurate detection results.
[0035] Embodiment 3, refer to Figures 1-9For the third embodiment of the present application, unlike the previous embodiment, the heat dissipation member 5 comprises a water pump 51 arranged inside the accommodating groove 15, the input end of the water pump 51 is provided with a water inlet pipe 52, the end of the water inlet pipe 52 away from the water pump 51 is provided with a water storage box 53, the water inlet pipe 52 is in communication with the water storage box 53, the water pump 51 can draw out the water in the water storage box 53 to cool the device, the side of the water storage box 53 is provided with a water supplement pipe 54, the water storage box 53 is in communication with the water supplement pipe 54, the end of the water supplement pipe 54 away from the water storage box 53 is provided with a threaded mounting seat 55, the bottom of the threaded mounting seat 55 is in communication with the water supplement pipe 54, the output end of the water pump 51 is provided with a circulating water pipe 56, the end of the circulating water pipe 56 away from the water pump 51 is connected with the water storage box 53, the circulating water pipe 56 is in communication with the water storage box 53, the upper side of the threaded mounting seat 55 is provided with a clamping ring 592, as shown in Figure 7 , the threaded mounting seat 55 is designed to adapt to the opening of the commonly used bottled water on the market, after the bottled water is inverted and threadedly mounted on the threaded mounting seat 55, the water in the water bottle can enter the water storage box 53 from the water supplement pipe 54 for heat dissipation of the heat dissipation member 5, and the clamping ring 592 can wrap the water bottle from the periphery to ensure stable mounting of the water bottle.
[0036] Further, the heat dissipation member 5 further comprises a first heat conduction plate 57 arranged on the side of the water pump 51, as shown in Figure 2 , the first heat conduction plate 57 is arranged on the bottom of the storage box 1, and the first heat conduction plate 57 is arranged between the ultrasonic detector 2 and the storage battery 4, since the device is sealed and the internal air circulation is not smooth, the first heat conduction plate 57 can absorb the heat generated by the internal elements of the power supply and the detector, and the outer wall of the first heat conduction plate 57 is wrapped with a first cooling water pipe 58, and the first cooling water pipe 58 is connected with the circulating water pipe 56, as shown in Figure 2 and Figure 7 , the water pump 51 draws out the water in the water storage box 53 and flows to the first cooling water pipe 58 through the circulating water pipe 56, the water flow in the first cooling water pipe 58 can take away the heat on the first heat conduction plate 57, the side of the circulating water pipe 56 is provided with a second cooling water pipe 591, the second cooling water pipe 591 is in communication with the circulating water pipe 56, and the side of the second cooling water pipe 591 is provided with a second heat conduction plate 59, as shown in Figure 2As shown, the second heat-conducting plate 59 is arranged in the interlayer 16, and is arranged on the side of the storage box 1. The second heat-conducting plate 59 mainly absorbs heat from the entire storage box 1. The water flow in the second cooling water pipe 591 carries away the heat on the second heat-conducting plate 59. The water in the cooling water pipe absorbs heat and then returns to the circulating water pipe 56 and flows into the water storage box 53, thereby circulating and carrying away heat. The exhaust structure 6 is arranged in the interlayer 16. A small amount of water vapor is generated when the water in the cooling water pipe absorbs heat. If the water vapor is discharged, it will affect the operation of the device. The exhaust structure 6 can discharge the water vapor.
[0037] The exhaust structure 6 includes an inner recessed frame 61 arranged on the side of the interlayer 16. An exhaust valve 62 is arranged in the inner recessed frame 61. An exhaust pipe 63 is arranged on the side of the exhaust valve 62. The exhaust valve 62 is in communication with the exhaust pipe 63. The bottom of the exhaust pipe 63 is connected to the circulating water pipe 56. Preferably, the end of the exhaust pipe 63 close to the circulating water pipe 56 is also provided with an exhaust valve 62. An exhaust window 65 is arranged on the side of the inner recessed frame 61. An exhaust fan 64 is arranged on the side of the exhaust window 65. The exhaust fan 64 rotates to discharge the gas in the inner recessed frame 61. Thus, a relative negative pressure is generated in the inner recessed frame 61. The water vapor generated in the circulating pipe is discharged to the inner recessed frame 61 through the exhaust pipe 63. The water vapor in the inner recessed frame 61 is discharged to the outside of the device by the exhaust fan 64.
[0038] During use, the device needs to work in a narrow and humid place such as a pre-buried well or an underground pipe trench. The heat generated by the device due to sealing needs to be discharged in time. Therefore, the heat dissipation member 5 uses the water pump 51 and the cooling water pipe in combination with the heat-conducting plate to water-cool and dissipate heat from the entire device. The exhaust structure 6 can discharge the water vapor generated in the water-cooling system.
[0039] Finally, it should be noted that the above detailed description of the method and device is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.
Claims
1. A partial discharge detection device for power cable inspection, characterized in that: include, Storage box (1), an ultrasonic detector (2) is installed inside the storage box (1), a handheld probe (3) is movably connected to the outside of the storage box (1), an accommodating space for storing the handheld probe (3) is opened inside the storage box (1), a battery (4) is installed on the side of the storage box (1), a heat dissipation component (5) is installed at the bottom of the storage box (1), and a double layer (16) is opened on the side wall of the storage box (1).
2. The partial discharge detection device for power cable inspection as described in claim 1, characterized in that: The storage box (1) has a partition (11) inside. The ultrasonic detector (2) is located below the partition (11). The handheld probe (3) can be stored above the partition (11). The top of the storage box (1) has a flip cover (12). The outer wall of the flip cover (12) has an external interface (13). The bottom of the external interface (13) has a cable (14). The bottom of the cable (14) passes through the partition (11) and is connected to the ultrasonic detector (2). The bottom of the storage box (1) has a receiving groove (15).
3. The partial discharge detection device for power cable inspection as described in claim 2, characterized in that: The handheld probe (3) includes a flexible cable (31), a connector (32) is provided at the bottom of the flexible cable (31), the connector (32) is connected to the external interface (13), a handle (33) is provided at the top of the flexible cable (31), a telescopic rod (34) is provided at the top of the handle (33), and a detection structure (35) is provided at the top of the telescopic rod (34).
4. The partial discharge detection device for power cable inspection as described in claim 3, characterized in that: The detection structure (35) includes a detection platform (351) disposed on the top of the telescopic rod (34). The detection platform (351) is hollow inside, and a motor (352) is disposed inside the detection platform (351). A worm gear (353) is disposed on the output shaft of the motor (352). A worm wheel (354) is disposed on the side of the worm gear (353). An active cable (355) is disposed on the outer wall of the worm wheel (354). An arc-shaped bracket (356) is disposed on the top of the detection platform (351). Both ends of the arc-shaped bracket (356) are provided with through holes (357). The through holes (357) penetrate the arc-shaped bracket (356). There are multiple arc-shaped brackets (356). Multiple arc-shaped brackets (356) are connected end to end to form a flexible connector. The active cable (355) passes through the through hole (357) and extends away from the detector (351). An ultrasonic phased array probe (358) is provided at one end of the arc-shaped bracket (356) away from the detector (351). A passive cable (359) is provided on the side of the ultrasonic phased array probe (358) away from the active cable (355). The passive cable (359) passes through the through hole (357) and extends towards the detector (351). A take-up roller (360) is provided at the bottom of the passive cable (359). The bottom of the passive cable (359) is wound around the outer wall of the take-up roller (360). The take-up roller (360) is located inside the detector (351). An elastic element (361) is provided on the side of the take-up roller (360).
5. The partial discharge detection device for power cable inspection as described in claim 4, characterized in that: The heat dissipation component (5) includes a water pump (51) disposed inside the receiving groove (15). The input end of the water pump (51) is provided with a water inlet pipe (52). A water storage box (53) is disposed at the end of the water inlet pipe (52) away from the water pump (51). The water inlet pipe (52) is connected to the water storage box (53). A water replenishment pipe (54) is disposed on the side of the water storage box (53). The water storage box (53) and the water replenishment pipe (54) are connected... The water supply pipe (54) is connected to the water storage box (53) at one end, and a threaded mounting seat (55) is provided at the other end of the water supply pipe (54). The bottom of the threaded mounting seat (55) is connected to the water supply pipe (54). The output end of the water pump (51) is provided with a circulating water pipe (56). The end of the circulating water pipe (56) away from the water pump (51) is connected to the water storage box (53). The circulating water pipe (56) is connected to the water storage box (53).
6. The partial discharge detection device for power cable inspection as described in claim 5, characterized in that: The heat dissipation component (5) further includes a first heat-conducting plate (57) disposed on the side of the water pump (51). The outer wall of the first heat-conducting plate (57) is wrapped with a first cooling water pipe (58). The first cooling water pipe (58) is connected to the circulating water pipe (56). A second cooling water pipe (591) is disposed on the side of the circulating water pipe (56). The second cooling water pipe (591) is connected to the circulating water pipe (56). A second heat-conducting plate (59) is disposed on the side of the second cooling water pipe (591). The second heat-conducting plate (59) is disposed in the interlayer (16). An exhaust structure (6) is disposed in the interlayer (16).
7. The partial discharge detection device for power cable inspection as described in claim 6, characterized in that: The exhaust structure (6) includes a concave frame (61) disposed on the side of the interlayer (16), an exhaust valve (62) is disposed inside the concave frame (61), an exhaust pipe (63) is disposed on the side of the exhaust valve (62), the exhaust valve (62) is connected to the exhaust pipe (63), and the bottom of the exhaust pipe (63) is connected to the circulating water pipe (56).
8. The partial discharge detection device for power cable inspection as described in claim 7, characterized in that: The concave frame (61) is provided with an exhaust window (65) on its side, and an exhaust fan (64) is provided on the side of the exhaust window (65). A retaining ring (592) is provided above the threaded mounting base (55).
9. The partial discharge detection device for power cable inspection as described in claim 8, characterized in that: The storage box (1) is equipped with a display screen (17) on its side.
10. The partial discharge detection device for power cable inspection as described in claim 9, characterized in that: The top of the storage box (1) is provided with a shoulder strap (18), and the side of the storage box (1) away from the display screen (17) is provided with a flexible back panel (19).