Power distribution network fault detection equipment for smart power grid

Abstract

The invention discloses power distribution network fault detection equipment for an intelligent power grid, and relates to the technical field of power distribution network fault detection of the intelligent power grid, the power distribution network fault detection equipment comprises a driving assembly, the driving assembly comprises a driving box sleeving a cable, and a bevel gear ring is fixed at the edge of one side, close to an annular plate, of a movable pipe sleeve. According to the power distribution network fault detection equipment for the intelligent power grid, fault detection can be carried out on a cable from different angles in the process of moving along the surface of the cable, the fault detection comprehensiveness is improved, and through gear transmission, when an ice layer is encountered, fault detection is more accurate. The electromagnet can stretch out from different angles to crush an ice layer when rotating around the cable under the effect that like poles repel each other, so that the problem that an existing fault detection device capable of moving along the surface of the cable for detection is difficult to move when encountering the ice layer is solved; and meanwhile, the ice layer can be eliminated by knocking the cable through a rod body without manual work or operation of an unmanned aerial vehicle, so that the detection applicability in a low-temperature icing environment is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution network fault detection of smart grid, in particular to a power distribution network fault detection device for smart grid. BACKGROUND

[0002] In the smart grid system, the power distribution network cable is the core physical carrier connecting the power generation side (distributed energy, main network) and the user side (industrial, commercial, residential load). It not only bears the traditional power transmission function, but also becomes the key infrastructure supporting the characteristics of smart grid sensing, interaction, efficiency and reliability through the integration of intelligent devices and communication technology. At present, in order to improve the fault detection accuracy and reduce the artificial burden, the cable detector is installed on the driving assembly, and the driving assembly is used to move on the cable so that the cable detector can detect different positions of the cable, and the fault position can be positioned and fed back in time.

[0003] In the existing process of moving the cable detector on the cable by using the driving assembly to carry out fault detection, when facing the low temperature icing condition, the ice on the surface of the cable will seriously hinder the movement of the driving assembly carrying the cable detector, resulting in that the fault detection cannot be carried out. Only the rod body for hitting can be carried by the artificial or unmanned aerial vehicle to knock the surface of the cable, so that the ice layer is broken and falls off, and then the driving assembly can carry the cable detector to move for fault detection. This way of eliminating the ice layer is time-consuming and laborious, so that the existing way of moving the cable detector on the cable by using the driving assembly to carry out fault detection has low efficiency under the condition of low temperature icing of the cable. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a power distribution network fault detection device for smart grid, which solves the problems raised in the background art.

[0005] In order to achieve the above object, the present application is realized by the following technical scheme: A power distribution network fault detection device for smart grid, comprising a driving assembly, the driving assembly comprises a driving box sleeved on the outside of the cable, and the side of the driving box is fixed with a driving motor, the output end of the driving motor is connected with a lower driving wheel, and the side of the lower driving wheel is connected with an upper driving wheel through a first gear set transmission, the inner wall of the driving box is fixed with an annular plate through a support on both sides, and the side middle part of the annular plate is fixed with a threading sleeve, the edge of the side of the annular plate is embedded with an electromagnet in a ring shape, the outer wall of the threading sleeve is rotatably connected with a movable sleeve, and the inner wall top of the movable sleeve is fixed with a hydraulic pipe box, the one end of the hydraulic pipe box close to the annular plate is provided with a spring piston rod, and the bottom of the one end of the hydraulic pipe box away from the annular plate is provided with an icebreaking cone, the inner wall bottom of the movable sleeve is fixed with a cable detector, the side edge of the movable sleeve close to the annular plate is fixed with a bevel gear ring, and the side of the bevel gear ring is meshed with a transmission bevel gear, and the side of the transmission bevel gear is connected with the output end of the driving motor through a second gear set.

[0006] Further, the upper driving wheel and the lower driving wheel rotate towards each other, and the upper driving wheel and the lower driving wheel are attached to the surface of the cable.

[0007] Further, the inside of the threading sleeve is provided with a cable, and the end face of the threading sleeve is provided with a pressure sensor.

[0008] Further, the end of the spring piston rod penetrates the movable sleeve, and the movable sleeve and the threading sleeve are one-to-one arranged.

[0009] Further, the rotation radius of the spring piston rod is consistent with the distribution radius of the electromagnet.

[0010] Further, the positions of the icebreaking cone and the cable detector are beyond the position of the end of the threading sleeve.

[0011] Further, the maximum extension distance of the icebreaking cone is less than the distance between the hydraulic pipe box and the surface of the cable.

[0012] Further, the two sides of the lower driving wheel and the upper driving wheel are rotatably connected with support seats, and the bottom of the support seat is fixedly connected with the driving box through spring telescopic legs.

[0013] Further, the inside center of the lower driving wheel and the upper driving wheel is embedded with an electromagnetic ring, and the inside of the lower driving wheel and the upper driving wheel is provided with a sliding groove around the electromagnetic ring.

[0014] Further, the inside of the sliding groove is embedded with a movable ball, the inner diameter size of the two ends of the sliding groove is less than the outer diameter size of the movable ball, the movable ball is embedded in the sliding block, and the sliding block is located between the movable ball and the electromagnetic ring.

[0015] The application provides a power distribution network fault detection device for a smart grid, which has the following beneficial effects: 1. The power distribution network fault detection device for the smart grid drives the lower driving wheel and the upper driving wheel to roll along the surface of the cable to realize mobile detection, and through the cooperation of various gears, the cable detection instrument can rotate around the cable, so that the cable can be detected from different angles during movement, thereby improving the comprehensiveness of fault detection, and through the transmission of the gears, when ice layer is encountered, the repulsion between the electromagnet and the spring piston rod end part of the same nature enables the electromagnet to extend from different angles when rotating around the cable to break the ice layer, thereby solving the problem that the existing fault detection device that can move along the surface of the cable for detection cannot move when encountering ice layer, and eliminating the ice layer by manually or remotely controlling the unmanned aerial vehicle to knock the cable with a rod, thereby greatly improving the detection applicability in low-temperature icing environment.

[0016] 2. The power distribution network fault detection device for the smart grid, in the time period from the time when the threaded sleeve end surface contacts the ice layer to the time when the ice layer is broken and separated by the ice-breaking cone, the movable ball protrudes from the surface of the lower driving wheel and the upper driving wheel and contacts the surface of the cable, so that the lower driving wheel and the upper driving wheel are separated from the surface of the cable, thereby converting the friction between the lower driving wheel and the upper driving wheel and the cable into rolling friction between the movable ball and the cable, avoiding the phenomenon of slipping or jamming of the lower driving wheel and the upper driving wheel with the surface of the cable during the ice-breaking time period, thereby avoiding the problem of wear of the surface of the cable or the problem of the movable sleeve being unable to rotate due to jamming. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of the movable sleeve structure of the power distribution network fault detection device for the smart grid of the application; Figure 2 FIG. 2 is a schematic diagram of the appearance structure of the driving box of the power distribution network fault detection device for the smart grid of the application; Figure 3 FIG. 3 is a schematic diagram of the ring plate structure of the power distribution network fault detection device for the smart grid of the application; Figure 4 FIG. 4 is a schematic diagram of the first gear set structure of the power distribution network fault detection device for the smart grid of the application; Figure 5 FIG. 5 is a schematic diagram of the cross-sectional structure of the movable sleeve of the power distribution network fault detection device for the smart grid of the application; Figure 6 FIG. 6 is a schematic diagram of the bottom structure of the hydraulic pipe box of the power distribution network fault detection device for the smart grid of the application; Figure 7It is a lower drive wheel and upper drive wheel section view structure schematic diagram of a power distribution network fault detection device for intelligent power grid.

[0018] In the figure: 1, drive assembly; 101, drive box; 102, drive motor; 103, lower drive wheel; 104, first gear set; 105, upper drive wheel; 106, annular plate; 107, threading sleeve; 108, electromagnet; 109, movable pipe sleeve; 110, hydraulic pipe box; 111, spring piston rod; 112, icebreaking cone; 113, cable detector; 114, bevel gear ring; 115, transmission bevel gear; 116, second gear set; 2, support seat; 3, spring telescopic foot; 4, electromagnetic ring; 5, sliding chute; 6, movable ball; 7, sliding block. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0020] As Figures 1-7As shown, the present application provides technical solutions: a power distribution network fault detection device for smart grid, including drive assembly 1, drive assembly 1 including drive box 101 set on the cable outside, and the side of drive box 101 is fixed with drive motor 102, the output end of drive motor 102 is connected with lower drive wheel 103, and the side of lower drive wheel 103 is drivenly connected with upper drive wheel 105 through first gear set 104, the inner wall both sides of drive box 101 are fixed with annular plate 106 through support, and the side middle part of annular plate 106 is fixed with threading sleeve 107, the side edge of annular plate 106 is embedded with electromagnet 108 in annular shape, the outer wall of threading sleeve 107 is rotatably connected with movable sleeve 109, and the inner wall top of movable sleeve 109 is fixed with hydraulic pipe box 110, one end of hydraulic pipe box 110 close to annular plate 106 is provided with spring piston rod 111, and the bottom surface of one end of hydraulic pipe box 110 away from annular plate 106 is provided with icebreaking cone 112, the inner wall bottom of movable sleeve 109 is fixed with cable detector 113, the side edge of movable sleeve 109 close to annular plate 106 is fixed with bevel gear ring 114, and one side of bevel gear ring 114 is meshingly connected with transmission bevel gear 115, the side of transmission bevel gear 115 is connected with the output end of drive motor 102 through second gear set 116, upper drive wheel 105 and lower drive wheel 103 rotate towards each other, and upper drive wheel 105 and lower drive wheel 103 are attached to the surface of cable, the inside of threading sleeve 107 is provided with cable, and the end surface of threading sleeve 107 is provided with pressure sensor, the end of spring piston rod 111 penetrates movable sleeve 109, and movable sleeve 109 and threading sleeve 107 are one-to-one arranged, the rotation radius of spring piston rod 111 is consistent with the distribution radius of electromagnet 108, the positions of icebreaking cone 112 and cable detector 113 exceed the position of the end of threading sleeve 107, and the maximum extension distance of icebreaking cone 112 is less than the distance between hydraulic pipe box 110 and the surface of cable; The specific operation is as follows: the cable is inserted into the center hole of threading sleeve 107, the drive box 101 is set on the outside of the cable, at this time, the spring telescopic leg 3 at the bottom of the support seat 2 is adjusted, the elastic telescopic characteristics thereof is used to push the upper drive wheel 105 to displace downward, and the lower drive wheel 103 is displaced upward, until the upper drive wheel 105 and the lower drive wheel 103 are tightly attached to the surface of the cable (the attachment pressure can be controlled by the precompression amount of the spring telescopic leg 3, which is usually set to 50-80N, and is suitable for common power distribution network cables with a diameter of 10-50mm; The pressure sensor at the end face of the threading sleeve 107 is calibrated with a trigger threshold of 10 N (i.e. when the pressure at the end face of the threading sleeve 107 reaches 10 N upon contact with the ice layer, it is determined that the cable surface is iced and obstructed from moving); the threading sleeve 107 is fixed at the center of the annular plate 106, the inner wall of which is made of wear-resistant nylon material, which not only provides axial guidance for the cable (to avoid deviation when the device moves), but also prevents the cable surface from being scratched by metal parts; at the same time, the length of the threading sleeve 107 exceeds the end face of the drive box 101 by 5-10 cm, so as to contact the front obstacle such as a slight protrusion in advance, avoiding direct collision of the drive wheel; The drive motor 102 is started to drive the lower drive wheel 103 to rotate, and the lower drive wheel 103 drives the upper drive wheel 105 to rotate in opposite directions through the first gear set 104, so that the lower drive wheel 103 and the upper drive wheel 105 roll along the surface of the cable, thereby driving the drive box 101 and the threading sleeves 107 on both sides to move; when the cable surface is iced, the threading sleeve 107 contacts the ice layer to trigger the pressure sensor at the end thereof; at this time, the electromagnet 108 on the surface of the annular plate 106 is energized, and the energized electromagnet 108 is of the same polarity as the end of the spring piston rod 111; When the drive motor 102 is started, the output end thereof also drives the second gear set 116 to rotate, so that the transmission bevel gear 115 drives the bevel gear ring 114 to drive the movable sleeve 109 to rotate; when the movable sleeve 109 rotates, it carries the hydraulic pipe box 110, the spring piston rod 111, the ice-breaking cone 112 and the cable detector 113 to rotate; during the rotation of the spring piston rod 111, when it coincides with the electromagnet 108, the spring piston rod 111 is quickly pressed into the interior of the hydraulic pipe box 110 due to the same polarity repulsion, which drives the ice-breaking cone 112 to extend close to the cable through the transmission medium, thereby breaking the ice layer on the surface of the cable; after the ice layer is broken, the cable detector 113 can detect faults at different positions on the surface of the cable through rotation, and the spring piston rod 111 repels the electromagnet 108 at different positions through rotation, thereby breaking the ice layer on the surface of the cable at different angles; when the spring piston rod 111 is misaligned with the electromagnet 108, it automatically extends under the elastic action to retract the ice-breaking cone 112, so as to extend and break ice under the next same polarity repulsion; The transmission medium in the hydraulic pipe box 110 is hydraulic oil, such as low-temperature resistant hydraulic oil, which is suitable for-30℃ environment; the compression of the spring piston rod 111 pushes the hydraulic oil to flow to the other end of the box body, thereby pushing the ice-breaking cone 112 to extend towards the surface of the cable; the ice-breaking cone 112 is made of tungsten steel material with a sharp end angle of 30°; When the ice layer is broken, the lower driving wheel 103 and the upper driving wheel 105 roll along the surface of the cable to realize the movement detection in the ice-coated state of the cable, wherein the maximum extension distance of the ice-breaking cone 112 is less than the spacing between the hydraulic pipe box 110 and the surface of the cable, so that the ice breaking can be ensured while avoiding applying pressure to the surface of the cable, thereby avoiding unnecessary damage to the surface of the cable; The detection probe (such as an infrared temperature measurement probe or an insulation resistance probe) of the cable detector 113 can perform 360° non-dead-angle scanning on the surface of the cable, collect cable state data in real time, and upload the cable state data to the background control system through a wireless module; if a fault (such as abnormal resistance caused by damage to the insulation layer) is detected, the device automatically records the fault position, locates the fault position through a GPS positioning module, and sends an alarm signal; Based on the above description, the lower driving wheel 103 and the upper driving wheel 105 are driven to roll along the surface of the cable by the driving motor 102 to realize movement detection, and the cable detector 113 is rotated around the cable through the cooperation of various gears, so that the cable can be detected for faults from different angles during movement, thereby improving the comprehensiveness of fault detection, and through the transmission of the gears, when ice layers are encountered, the electromagnet 108 can be extended from different angles to break the ice layers when rotating around the cable through the repulsion of the same polarity between the electromagnet 108 and the end of the spring piston rod 111, thereby solving the problem that the existing fault detection device that can move along the surface of the cable for detection cannot move when encountering ice layers, and eliminating the ice layers by manually or remotely controlling the unmanned aerial vehicle to knock the cable with a rod, thereby greatly improving the detection applicability in low-temperature icing environments.

[0021] As shown in Figures 1-7 The lower driving wheel 103 and the upper driving wheel 105 are rotatably connected with support seats 2 on both sides, and the bottom of the support seat 2 is fixedly connected with the driving box 101 through spring telescopic legs 3. The electromagnet ring 4 is embedded in the inner center of the lower driving wheel 103 and the upper driving wheel 105, and the sliding groove 5 is formed around the electromagnet ring 4 in the lower driving wheel 103 and the upper driving wheel 105. The movable ball 6 is embedded in the sliding groove 5, and the inner diameter size of the sliding groove 5 at both ends is smaller than the outer diameter size of the movable ball 6. The movable ball 6 is embedded in the sliding block 7, and the sliding block 7 is located between the movable ball 6 and the electromagnet ring 4. Specific operation as follows, in threading sleeve 107 end surface and ice layer contact, pressure sensor is triggered also makes electromagnetic ring 4 energized, at this moment electromagnetic ring 4 and slider 7 same sex repulsion to push movable ball 6 away from electromagnetic ring 4, so that movable ball 6 protrudes from the surface of lower drive wheel 103, upper drive wheel 105 and contact with the surface of cable, and at this moment same sex repulsion force is greater than the elastic support force of spring telescopic support leg 3, so that spring telescopic support leg 3 is compressed, at this moment lower drive wheel 103, upper drive wheel 105 leaves the surface of cable, only movable ball 6 is in contact with the surface of cable, and the two gears of first gear set 104 are separated from each other; At this moment, the driving motor 102 drives the lower drive wheel 103 to rotate, and the upper drive wheel 105 does not rotate, and when the lower drive wheel 103 rotates, the movable ball 6 on the surface of the lower drive wheel 103 rotates and rolls and rubs with the surface of the cable, so that during the time when the end surface of the threading sleeve 107 contacts the ice layer to the time when the ice layer is broken and separated by the ice-breaking cone 112, the friction between the lower drive wheel 103, the upper drive wheel 105 and the cable can be converted into the rolling friction between the movable ball 6 and the cable, thereby reducing the friction and avoiding the phenomenon of slipping or jamming of the lower drive wheel 103 and the upper drive wheel 105 with the surface of the cable during the ice-breaking period. Based on the above description, during the time when the end surface of the threading sleeve 107 contacts the ice layer to the time when the ice layer is broken and separated by the ice-breaking cone 112, the lower drive wheel 103 and the upper drive wheel 105 are separated from the surface of the cable by protruding the movable ball 6 from the surface of the lower drive wheel 103 and the upper drive wheel 105 and contacting the surface of the cable, so that the friction between the lower drive wheel 103 and the upper drive wheel 105 and the cable is converted into the rolling friction between the movable ball 6 and the cable, thereby avoiding the phenomenon of slipping or jamming of the lower drive wheel 103 and the upper drive wheel 105 with the surface of the cable during the ice-breaking period, and thus avoiding the problem of wear of the surface of the cable or the problem of the movable sleeve 109 being unable to rotate due to jamming.

[0022] In summary, the power distribution network fault detection device for smart grid is used, first of all, the driving motor 102 is started to drive the lower drive wheel 103 to rotate, and the lower drive wheel 103 drives the upper drive wheel 105 to rotate in opposite directions through the first gear set 104, so that the lower drive wheel 103 and the upper drive wheel 105 roll along the surface of the cable, thereby driving the driving box 101 and the threading sleeves 107 on both sides to move, when encountering the icing condition of the surface of the cable, the threading sleeve 107 contacts the ice layer to trigger the pressure sensor at the end thereof, at this moment, the electromagnet 108 on the surface of the annular plate 106 is energized, and the energized electromagnet 108 and the end of the spring piston rod 111 are same sex; And when the driving motor 102 starts, its output end also drives the second gear set 116 to rotate, so that the transmission bevel gear 115 drives the bevel gear ring 114 to drive the movable sleeve 109 to rotate, and when the movable sleeve 109 rotates, it carries the hydraulic pipe box 110, the spring piston rod 111, the ice-breaking cone 112 and the cable detector 113 to rotate together, wherein the spring piston rod 111 is pressed into the hydraulic pipe box 110 due to the same polarity repulsion when it coincides with the electromagnet 108 during rotation, and through the transmission of the transmission medium, the ice-breaking cone 112 is extended close to the cable, thereby breaking the ice layer on the surface of the cable, and after the ice layer is broken, the cable detector 113 can detect the fault of the cable surface at different positions through rotation, and the spring piston rod 111 repels the electromagnet 108 at different positions through rotation, thereby breaking the ice layer on the cable surface at different angles, and when the spring piston rod 111 is out of position with the electromagnet 108, it is automatically extended under the elastic action to make the ice-breaking cone 112 retract, so as to extend and break the ice under the next same polarity repulsion; And with the ice layer broken, the lower driving wheel 103 and the upper driving wheel 105 roll along the surface of the cable to realize movement detection in the icing state of the cable, wherein the maximum extension distance of the ice-breaking cone 112 is less than the distance between the hydraulic pipe box 110 and the surface of the cable, thereby ensuring that ice breaking can be performed while avoiding applying pressure to the surface of the cable, thereby avoiding unnecessary damage to the surface of the cable; When the end face of the threading sleeve 107 contacts the ice layer, the pressure sensor is triggered to make the electromagnet ring 4 energized, at this time the electromagnet ring 4 repels the sliding block 7 to push the movable ball 6 away from the electromagnet ring 4, so that the movable ball 6 protrudes from the surface of the lower driving wheel 103 and the upper driving wheel 105 and contacts the surface of the cable, and at this time the repulsive force of the same polarity is greater than the elastic support force of the spring telescopic leg 3, so that the spring telescopic leg 3 is compressed, at this time the lower driving wheel 103 and the upper driving wheel 105 are away from the surface of the cable, only the movable ball 6 contacts the surface of the cable, and the two gears of the first gear set 104 are separated from each other; At this time, the driving motor 102 drives the lower driving wheel 103 to rotate while the upper driving wheel 105 does not rotate, and when the lower driving wheel 103 rotates, the movable ball 6 on its surface rotates and rolls and rubs with the surface of the cable, thereby converting the friction between the lower driving wheel 103, the upper driving wheel 105 and the cable into rolling friction between the movable ball 6 and the cable during the time when the end face of the threading sleeve 107 contacts the ice layer and the time when the ice layer is broken by the ice-breaking cone 112, thereby reducing the friction and avoiding the lower driving wheel 103 and the upper driving wheel 105 from slipping or jamming with the surface of the cable during the ice-breaking period, thereby avoiding the problem of the surface of the cable being worn or the movable sleeve 109 being unable to rotate due to jamming; When the device moves to the ice-free section, the pressure sensor at the end face of the threading sleeve 107 detects that the pressure drops below the threshold value, it is determined that the ice layer has been removed, and the device reset process is started: First, the power supply of the electromagnet 108 and the electromagnetic ring 4 is cut off, the magnetic field of the electromagnet 108 disappears, the spring piston rod 111 stops reciprocating, and the ice-breaking cone 112 remains retracted; after the magnetic field of the electromagnetic ring 4 disappears, the sliding block 7 is reset along the sliding groove 5 under the action of its own gravity and the elastic restoring force of the spring telescopic leg 3, the movable ball 6 is retracted to the inside of the driving wheel and no longer protrudes from the surface of the wheel body; The spring telescopic leg 3 extends under the action of the elastic restoring force, pushes the upper driving wheel 105 to displace downward, until the upper driving wheel 105 and the lower driving wheel 103 reattach to the surface of the cable; at the same time, the two gears of the first gear set 104 reengage, the upper driving wheel 105 restores the opposite rotation with the lower driving wheel 103, the moving power of the device switches back to the driving wheel friction mode, and the moving speed restores to the conventional detection level, while the movable sleeve 109 and the cable detector 113 always maintain the rotating detection state, ensuring the continuous and dead angle-free detection process.

[0023] Embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A power distribution network fault detection device for a smart grid, comprising a drive assembly (1), characterized in that: The driving assembly (1) comprises a driving box (101) sleeved on the cable, and a driving motor (102) is fixed on the side of the driving box (101); the output end of the driving motor (102) is connected with a lower driving wheel (103), and the side of the lower driving wheel (103) is drivingly connected with an upper driving wheel (105) through a first gear set (104); the inner wall of the driving box (101) is fixed with an annular plate (106) through a support on both sides, and the side middle part of the annular plate (106) is fixed with a threading sleeve (107); the side edge of the annular plate (106) is embedded with an electromagnet (108) in an annular shape; the outer wall of the threading sleeve (107) is rotatably connected with a movable sleeve (109), and the inner wall top of the movable sleeve (109) is fixed with a hydraulic pipe box (110); the one end of the hydraulic pipe box (110) close to the annular plate (106) is provided with a spring piston rod (111), and the bottom of the one end of the hydraulic pipe box (110) away from the annular plate (106) is provided with an icebreaking cone (112); the inner wall bottom of the movable sleeve (109) is fixed with a cable detector (113); the side edge of the movable sleeve (109) close to the annular plate (106) is fixed with a bevel gear ring (114), and the side of the bevel gear ring (114) is meshingly connected with a transmission bevel gear (115); the side of the transmission bevel gear (115) is connected with the output end of the driving motor (102) through a second gear set (116).

2. The power distribution network fault detection device for a smart grid of claim 1, wherein: The upper driving wheel (105) and the lower driving wheel (103) rotate towards each other, and the upper driving wheel (105) and the lower driving wheel (103) are attached to the surface of the cable.

3. The power distribution network fault detection device for a smart grid of claim 1, wherein: The inside of the threading sleeve (107) is provided with a cable, and the end face of the threading sleeve (107) is provided with a pressure sensor.

4. The power distribution network fault detection device for a smart grid of claim 1, wherein: The end of the spring piston rod (111) penetrates the movable sleeve (109), and the movable sleeve (109) and the threading sleeve (107) are one-to-one arranged.

5. The power distribution network fault detection device for a smart grid of claim 1, wherein: The rotation radius of the spring piston rod (111) is consistent with the distribution radius of the electromagnet (108).

6. The power distribution network fault detection device for a smart grid of claim 1, wherein: The positions of the icebreaking cone (112) and the cable detector (113) are beyond the position of the end of the threading sleeve (107).

7. The power distribution network fault detection device for a smart grid of claim 1, wherein: The maximum extension distance of the icebreaking cone (112) is less than the distance between the hydraulic pipe box (110) and the surface of the cable.

8. The power distribution network fault detection device for a smart grid of claim 1, wherein: The two sides of the lower driving wheel (103) and the upper driving wheel (105) are rotatably connected with support seats (2), and the bottom of the support seat (2) is fixedly connected with the driving box (101) through spring telescopic legs (3).

9. The power distribution network fault detection device for a smart grid of claim 1, wherein: The inside center of the lower driving wheel (103) and the upper driving wheel (105) is embedded with an electromagnetic ring (4), and a sliding groove (5) is formed around the electromagnetic ring (4) in the lower driving wheel (103) and the upper driving wheel (105).

10. The power distribution network fault detection device for a smart grid of claim 9, wherein: The inside of the sliding groove (5) is embedded with a movable ball (6), the inner diameter size of the two ends of the sliding groove (5) is less than the outer diameter size of the movable ball (6), the movable ball (6) is embedded in a sliding block (7), and the sliding block (7) is located between the movable ball (6) and the electromagnetic ring (4).

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