A distribution network fault detection device for smart grids

Abstract

This invention discloses a distribution network fault detection device for smart grids, relating to the field of distribution network fault detection technology for smart grids. It includes a drive assembly comprising a drive box sleeved around the cable, with a conical gear ring fixed to the edge of the movable sleeve near the annular plate. This smart grid distribution network fault detection device can detect faults from different angles while moving along the cable surface, improving the comprehensiveness of fault detection. Furthermore, through gear transmission, when encountering ice, the electromagnet extends from different angles to break up the ice layer due to the repulsion of like poles as it rotates around the cable. This solves the problem of existing fault detection devices that can move along the cable surface being difficult to move when encountering ice. It also eliminates the need for manual labor or drones to use rods to strike the cable to remove ice, thus greatly improving its applicability in low-temperature icing environments.

Description

Technical Field

[0001] This invention relates to the field of distribution network fault detection technology for smart grids, specifically to a distribution network fault detection device for smart grids. Background Technology

[0002] In the smart grid system, distribution network cables are the core physical carriers connecting the generation side (distributed energy, main grid) and the user side (industrial, commercial, and residential loads). They not only undertake the traditional power transmission function, but also become a key infrastructure supporting the sensing, interaction, efficiency, and reliability characteristics of the smart grid through integration with smart devices and communication technologies. Currently, in order to improve the accuracy of fault detection and reduce the manual burden, cable detectors are installed on drive components. The drive components move on the cable, allowing the cable detector to detect different positions on the cable and locate and provide feedback on the fault location in a timely manner.

[0003] In existing methods of using a drive assembly to move a cable detector along a cable for fault detection, severe icing on the cable surface at low temperatures can hinder the movement of the cable detector, making fault detection impossible. The only solution is to manually or via drone using a striking rod to break the ice before the drive assembly can move the detector. This method of removing ice is time-consuming and labor-intensive, making it inefficient in situations where cables are icy at low temperatures. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a distribution network fault detection device for smart grids, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a distribution network fault detection device for smart grids, comprising a drive assembly, the drive assembly including a drive box sleeved on the outside of a cable, a drive motor fixed to the side of the drive box, a lower drive wheel connected to the output end of the drive motor, an upper drive wheel connected to the side of the lower drive wheel via a first gear set, annular plates fixed to both sides of the inner wall of the drive box by brackets, a wire threading sleeve fixed to the middle of the side of the annular plate, an electromagnet embedded in a ring shape at the edge of the side of the annular plate, a movable sleeve rotatably connected to the outer wall of the wire threading sleeve, a hydraulic tube box fixed to the top of the inner wall of the movable sleeve, a spring piston rod passing through the end of the hydraulic tube box near the annular plate, and an ice-breaking cone passing through the bottom surface of the end of the hydraulic tube box away from the annular plate, a cable detector fixed to the bottom of the inner wall of the movable sleeve, a conical gear ring fixed to the edge of the movable sleeve near the annular plate, a transmission bevel gear meshing with one side of the conical gear ring, and the side of the transmission bevel gear connected to the output end of the drive motor via a second gear set.

[0006] Furthermore, the upper drive wheel and the lower drive wheel rotate in opposite directions, and the upper drive wheel and the lower drive wheel are in contact with the surface of the cable.

[0007] Furthermore, a cable is threaded through the inside of the threading sleeve, and a pressure sensor is provided at the end face of the threading sleeve.

[0008] Furthermore, the end of the spring piston rod passes through the movable sleeve, and the movable sleeve and the threaded sleeve are arranged in a one-to-one manner.

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

[0010] Furthermore, the ice-breaking cone and cable detector are located beyond the position of the end of the cable threading sleeve.

[0011] Furthermore, the maximum extension distance of the ice-breaking cone is less than the distance between the hydraulic tubing box and the cable surface.

[0012] Furthermore, both sides of the lower drive wheel and the upper drive wheel are rotatably connected to support seats, and the bottom of the support seats is fixedly connected to the drive box through spring telescopic feet.

[0013] Furthermore, an electromagnetic ring is embedded in the center of the lower drive wheel and the upper drive wheel, and a groove is formed around the electromagnetic ring inside the lower drive wheel and the upper drive wheel.

[0014] Furthermore, the groove has a movable ball embedded inside, and the inner diameter of both ends of the groove is smaller than the outer diameter of the movable ball. The movable ball is embedded in the slider, and the slider is located between the movable ball and the electromagnetic ring.

[0015] This invention provides a distribution network fault detection device for smart grids, which has the following advantages:

[0016] 1. The distribution network fault detection equipment used in this smart grid utilizes a drive motor to drive the lower and upper drive wheels to roll along the cable surface for mobile detection. Simultaneously, through the coordination of various gears, the cable detector rotates around the cable. This allows for fault detection from different angles during movement, improving the comprehensiveness of fault detection. Furthermore, when encountering ice, the like poles of the electromagnet and the end of the spring piston rod repel each other, allowing the electromagnet to extend from different angles as it rotates around the cable, breaking up the ice. This solves the problem of existing fault detection equipment that can move along the cable surface being difficult to move when encountering ice. It also eliminates the need for manual labor or drones to use rods to strike the cable to remove ice, greatly improving its applicability in low-temperature icing environments.

[0017] 2. The distribution network fault detection equipment used in this smart grid, during the time from when the end face of the cable sleeve contacts the ice layer to when the ice layer is broken and removed by the ice-breaking cone, has movable ball bearings protruding from the surfaces of the lower and upper drive wheels and contacting the cable surface. This causes the lower and upper drive wheels to leave the cable surface, thereby converting the frictional force between the lower and upper drive wheels and the cable into rolling friction between the movable ball bearings and the cable. This prevents the lower and upper drive wheels from slipping or getting stuck on the cable surface during the ice-breaking period, thus avoiding problems such as cable surface wear or the movable sleeve being unable to rotate due to jamming. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the movable sleeve structure of a distribution network fault detection device for smart grids according to the present invention;

[0019] Figure 2 This is a schematic diagram of the external structure of the drive box of a distribution network fault detection device for smart grids according to the present invention.

[0020] Figure 3 This is a schematic diagram of the ring plate structure of a distribution network fault detection device for smart grids according to the present invention;

[0021] Figure 4 This is a schematic diagram of the first gear set structure of a distribution network fault detection device for smart grids according to the present invention;

[0022] Figure 5 This is a schematic cross-sectional view of the movable sleeve structure of a distribution network fault detection device for smart grids according to the present invention;

[0023] Figure 6This is a schematic diagram of the bottom structure of a hydraulic pipe box for a distribution network fault detection device for a smart grid according to the present invention;

[0024] Figure 7 This is a cross-sectional view of the lower drive wheel and upper drive wheel of a distribution network fault detection device for smart grids according to the present invention.

[0025] In the diagram: 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 tube sleeve; 110. Hydraulic tube box; 111. Spring piston rod; 112. Icebreaker; 113. Cable detector; 114. Bevel gear ring; 115. Transmission bevel gear; 116. Second gear set; 2. Support base; 3. Spring telescopic support foot; 4. Electromagnetic ring; 5. Slide groove; 6. Movable ball bearing; 7. Slider. Detailed Implementation

[0026] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0027] like Figures 1-7As shown, the present invention provides a technical solution: a distribution network fault detection device for smart grids, comprising a drive assembly 1, the drive assembly 1 including a drive box 101 sleeved on the outside of the cable, and a drive motor 102 fixed on the side of the drive box 101, the output end of the drive motor 102 being connected to a lower drive wheel 103, and an upper drive wheel 105 being driven to the side of the lower drive wheel 103 via a first gear set 104; and annular plates 106 fixed to both sides of the inner wall of the drive box 101 by brackets. Furthermore, a threading sleeve 107 is fixed to the middle of the side of the annular plate 106, and an electromagnet 108 is embedded in the annular shape at the edge of the side of the annular plate 106. A movable tube sleeve 109 is rotatably connected to the outer wall of the threading sleeve 107, and a hydraulic tube box 110 is fixed to the top of the inner wall of the movable tube sleeve 109. A spring piston rod 111 is installed at the end of the hydraulic tube box 110 near the annular plate 106, and an ice-breaking cone 112 is installed at the bottom surface of the end of the hydraulic tube box 110 away from the annular plate 106. The bottom of the inner wall of the movable tube sleeve 109... A cable detector 113 is fixed in place. A bevel gear ring 114 is fixed to one edge of the movable sleeve 109 near the annular plate 106. A transmission bevel gear 115 is meshed with one side of the bevel gear ring 114. The side of the transmission bevel gear 115 is connected to the output end of the drive motor 102 through the second gear set 116. The upper drive wheel 105 and the lower drive wheel 103 rotate in opposite directions, and the upper drive wheel 105 and the lower drive wheel 103 are in contact with the surface of the cable. The cable is inserted inside the cable threading sleeve 107. There is a cable, and a pressure sensor is installed at the end face of the cable sleeve 107. The end of the spring piston rod 111 passes through the movable sleeve 109, and the movable sleeve 109 and the cable sleeve 107 are arranged one-to-one. The rotation radius of the spring piston rod 111 is consistent with the distribution radius of the electromagnet 108. The positions of the ice-breaking cone 112 and the cable detector 113 are beyond the position of the end of the cable sleeve 107. The maximum extension distance of the ice-breaking cone 112 is less than the distance between the hydraulic tube box 110 and the cable surface.

[0028] The specific operation is as follows: insert the cable through the center hole of the cable threading sleeve 107, so that the drive box 101 is fitted on the outside of the cable. At this time, by adjusting the spring telescopic support foot 3 at the bottom of the support base 2, the upper drive wheel 105 is pushed downward and the lower drive wheel 103 is pushed 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 pre-compression amount of the spring telescopic support foot 3, which is usually set to 50-80N, suitable for common power distribution cables with a diameter of 10-50mm).

[0029] Calibrate the pressure sensor on the end face of the cable threading sleeve 107: Set the trigger threshold to 10N (that is, when the contact pressure between the end face of the cable threading sleeve 107 and the ice layer reaches 10N, it is determined that the cable surface is frozen and hinders movement). The cable threading sleeve 107 is fixed to the center of the annular plate 106. Its inner wall is made of wear-resistant nylon material, which provides axial guidance for the cable (to prevent the equipment from shifting when moving) and prevents the cable surface from being scratched by metal parts. At the same time, the length of the cable threading sleeve 107 extends 5-10cm beyond the end face of the drive box 101, so that it can contact obstacles in front in advance, such as slight protrusions, to avoid direct collision of the drive wheels.

[0030] The drive motor 102 starts to drive the lower drive wheel 103 to rotate. 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 cable surface, thereby driving the drive box 101 and the wire threading sleeves 107 on both sides to move. When the cable surface is icy, the wire threading sleeve 107 contacts the ice layer, thereby triggering the pressure sensor at its end. At this time, 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 of the same polarity.

[0031] When the drive motor 102 starts, its output also drives the second gear set 116 to rotate, causing the transmission bevel gear 115 to drive the bevel gear ring 114 to drive the movable sleeve 109 to rotate. When the movable sleeve 109 rotates, it carries the hydraulic tube box 110, spring piston rod 111, icebreaker cone 112 and cable detector 113 to rotate together. During the rotation, when the spring piston rod 111 coincides with the electromagnet 108, due to the repulsion of like poles, the spring piston rod 111 is quickly pressed into the hydraulic tube box 110, and the transmission medium transmits the power through the hydraulic tube box 110. The movement causes the ice-breaking cone 112 to extend and approach the cable, thereby breaking the ice layer on the cable surface. After the ice layer is broken, the cable detector 113 can detect faults at different positions on the cable surface by rotating. Moreover, the spring piston rod 111 rotates and repels the electromagnets 108 at different positions, thereby breaking the ice layer on the cable surface at different angles. When the spring piston rod 111 and the electromagnet 108 are misaligned, the spring piston rod 111 automatically extends under its elastic action, causing the ice-breaking cone 112 to retract, so that it can extend and break the ice under the next repulsive action.

[0032] The transmission medium inside the hydraulic housing 110 is hydraulic oil, such as low-temperature resistant hydraulic oil, which is suitable for environments up to -30°C. The compression of the spring piston rod 111 will push the hydraulic oil to flow to the other end of the housing, thereby pushing the ice-breaking cone 112 to extend towards the cable surface. The ice-breaking cone 112 is made of tungsten steel and has a tip angle of 30°.

[0033] As the ice breaks, the lower drive wheel 103 and the upper drive wheel 105 roll along the cable surface to achieve movement detection in the state of the cable being frozen. The maximum extension distance of the ice-breaking cone 112 is less than the distance between the hydraulic box 110 and the cable surface. This ensures that ice breaking can be carried out while avoiding pressure being applied to the cable surface, thereby avoiding unnecessary damage to the cable surface.

[0034] Among them, the cable detector 113 has a detection probe (such as an infrared temperature probe or an insulation resistance probe) that can perform a 360° scan of the cable surface without dead angles, collect cable status data in real time, and upload it to the background control system via a wireless module; if a fault is detected (such as abnormal resistance caused by insulation layer damage), the device will automatically record the fault location, locate the fault location through a GPS positioning module, and issue an alarm signal.

[0035] Based on the above description, this invention utilizes a drive motor 102 to drive the lower drive wheel 103 and the upper drive wheel 105 to roll along the cable surface to achieve mobile detection. At the same time, through the cooperation of various gears, the cable detector 113 can rotate around the cable. Thus, during the movement, fault detection of the cable can be performed from different angles, thereby improving the comprehensiveness of fault detection. Furthermore, through the gear transmission, when encountering ice, the electromagnet 108 and the end of the spring piston rod 111 repel each other, allowing the electromagnet 108 to extend from different angles to break the ice layer as it rotates around the cable. This solves the problem that existing fault detection devices that can move along the cable surface are difficult to move when encountering ice. At the same time, there is no need for manual labor or the use of drones to strike the cable with a rod to remove the ice layer, thus greatly improving the applicability of detection in low-temperature icing environments.

[0036] like Figures 1-7 As shown, both sides of the lower drive wheel 103 and the upper drive wheel 105 are rotatably connected to support seats 2, and the bottom of the support seats 2 is fixedly connected to the drive box 101 through spring telescopic feet 3. An electromagnetic ring 4 is embedded in the center of the lower drive wheel 103 and the upper drive wheel 105, and a sliding groove 5 is opened around the electromagnetic ring 4 inside the lower drive wheel 103 and the upper drive wheel 105. A movable ball 6 is embedded in the sliding groove 5, and the inner diameter of both ends of the sliding groove 5 is smaller than the outer diameter of the movable ball 6. The movable ball 6 is embedded in the slider 7, and the slider 7 is located between the movable ball 6 and the electromagnetic ring 4.

[0037] The specific operation is as follows: when the end face of the threading sleeve 107 contacts the ice layer, the pressure sensor is triggered and the electromagnetic ring 4 is energized. At this time, the electromagnetic ring 4 and the slider 7 repel each other, pushing the movable ball 6 away from the electromagnetic ring 4, so that the movable ball 6 protrudes from the surface of the lower drive wheel 103 and the upper drive wheel 105 and contacts the cable surface. At this time, the force of repulsion is greater than the elastic support force of the spring telescopic support 3, so that the spring telescopic support 3 is compressed. At this time, the lower drive wheel 103 and the upper drive wheel 105 leave the cable surface, and only the movable ball 6 contacts the cable surface. The two gears of the first gear set 104 are separated from each other.

[0038] At this time, the drive motor 102 drives the lower drive wheel 103 to rotate while the upper drive wheel 105 does not rotate. When the lower drive wheel 103 rotates, the movable ball 6 on its surface rotates and rolls and rubs against the cable surface. Thus, during the time from when the end face of the cable sleeve 107 contacts the ice layer to when the ice layer is broken and removed by the ice-breaking cone 112, the friction between the lower drive wheel 103, the upper drive wheel 105 and the cable can be transformed into rolling friction between the movable ball 6 and the cable, thereby reducing the friction and preventing the lower drive wheel 103 and the upper drive wheel 105 from slipping or getting stuck on the cable surface during the ice-breaking period.

[0039] Based on the above description, during the time from when the end face of the cable sleeve 107 contacts the ice layer to when the ice layer is broken and removed by the ice-breaking cone 112, the movable ball 6 protrudes from the surface of the lower drive wheel 103 and the upper drive wheel 105 and contacts the cable surface, causing the lower drive wheel 103 and the upper drive wheel 105 to leave the cable surface. This transforms the friction between the lower drive wheel 103 and the upper drive wheel 105 and the cable into rolling friction between the movable ball 6 and the cable, preventing the lower drive wheel 103 and the upper drive wheel 105 from slipping or getting stuck on the cable surface during the ice-breaking period. This avoids the cable surface from being worn or the movable sleeve 109 from being unable to rotate due to jamming.

[0040] In summary, when the distribution network fault detection equipment used in this smart grid is in use, the drive motor 102 is first started to drive the lower drive wheel 103 to rotate. 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 cable surface, thereby driving the drive box 101 and the wire threading sleeves 107 on both sides to move. When encountering ice on the cable surface, the wire threading sleeve 107 contacts the ice layer, thereby triggering the pressure sensor at its end. At this time, 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 of the same polarity.

[0041] When the drive motor 102 starts, its output also drives the second gear set 116 to rotate, causing the transmission bevel gear 115 to drive the bevel gear ring 114 to drive the movable sleeve 109 to rotate. When the movable sleeve 109 rotates, it carries the hydraulic tube box 110, spring piston rod 111, icebreaker cone 112 and cable detector 113 to rotate together. During the rotation, when the spring piston rod 111 coincides with the electromagnet 108, due to the repulsion of like poles, the spring piston rod 111 is quickly pressed into the hydraulic tube box 110, and the transmission medium transmits the power through the hydraulic tube box 110. The movement causes the ice-breaking cone 112 to extend and approach the cable, thereby breaking the ice layer on the cable surface. After the ice layer is broken, the cable detector 113 can detect faults at different positions on the cable surface by rotating. Moreover, the spring piston rod 111 rotates and repels the electromagnets 108 at different positions, thereby breaking the ice layer on the cable surface at different angles. When the spring piston rod 111 and the electromagnet 108 are misaligned, the spring piston rod 111 automatically extends under its elastic action, causing the ice-breaking cone 112 to retract, so that it can extend and break the ice under the next repulsive action.

[0042] As the ice breaks, the lower drive wheel 103 and the upper drive wheel 105 roll along the cable surface to achieve movement detection in the state of the cable being frozen. The maximum extension distance of the ice-breaking cone 112 is less than the distance between the hydraulic box 110 and the cable surface. This ensures that ice breaking can be carried out while avoiding pressure being applied to the cable surface, thereby avoiding unnecessary damage to the cable surface.

[0043] When the end face of the threading sleeve 107 comes into contact with the ice layer, the pressure sensor is triggered, which also energizes the electromagnetic ring 4. At this time, the electromagnetic ring 4 and the slider 7 repel each other, pushing the movable ball 6 away from the electromagnetic ring 4, so that the movable ball 6 protrudes from the surface of the lower drive wheel 103 and the upper drive wheel 105 and comes into contact with the cable surface. At this time, the force of repulsion is greater than the elastic support force of the spring telescopic support 3, so that the spring telescopic support 3 is compressed. At this time, the lower drive wheel 103 and the upper drive wheel 105 leave the cable surface, and only the movable ball 6 is in contact with the cable surface. The two gears of the first gear set 104 are separated from each other.

[0044] At this time, the drive motor 102 drives the lower drive wheel 103 to rotate while the upper drive wheel 105 does not rotate. When the lower drive wheel 103 rotates, the movable ball 6 on its surface rotates and rolls and rubs against the cable surface. Thus, during the time from when the end face of the cable sleeve 107 contacts the ice layer to when the ice layer is broken and removed by the ice-breaking cone 112, the friction between the lower drive wheel 103, the upper drive wheel 105 and the cable can be transformed into rolling friction between the movable ball 6 and the cable, thereby reducing the friction and preventing the lower drive wheel 103 and the upper drive wheel 105 from slipping or getting stuck on the cable surface during the ice-breaking period. This avoids the cable surface being worn or the movable sleeve 109 being unable to rotate due to jamming.

[0045] When the equipment moves to an ice-free section, the pressure sensor on the end face of the cable sleeve 107 detects that the pressure has dropped below the threshold, indicating that the ice layer has been cleared, and the equipment reset process is initiated.

[0046] First, the power supply to electromagnet 108 and electromagnetic ring 4 is cut off. The magnetic field of electromagnet 108 disappears, the spring piston rod 111 stops reciprocating, and the ice-breaking cone 112 remains in a retracted state. After the magnetic field of electromagnetic ring 4 disappears, the slider 7 returns to its original position along the slide groove 5 under the action of its own gravity and the elastic restoring force of the spring telescopic support 3. The movable ball 6 retracts into the drive wheel and no longer protrudes from the surface of the wheel.

[0047] The spring-loaded telescopic support leg 3 extends under the action of elastic restoring force, pushing the upper drive wheel 105 downward until the upper drive wheel 105 and the lower drive wheel 103 re-apply to the cable surface; at the same time, the two gears of the first gear set 104 re-mesh, the upper drive wheel 105 resumes its opposite rotation with the lower drive wheel 103, the moving power of the equipment switches back to the drive wheel friction mode, the moving speed returns to the normal detection level, while the movable sleeve 109 and the cable detector 113 always maintain a rotating detection state to ensure that the entire detection process is continuous and without blind spots.

[0048] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A power distribution network fault detection device for a smart grid, comprising a drive assembly (1), characterized in that: The utility model provides an electric cable driving assembly, which comprises a driving box (101) sleeved on the outside of the electric cable, a driving motor (102) fixed on the side of the driving box (101), a lower driving wheel (103) connected to the output end of the driving motor (102), an upper driving wheel (105) in transmission connection with the side of the lower driving wheel (103) through a first gear set (104), an annular plate (106) fixed on the inner wall of the driving box (101) through a support on both sides, a threading sleeve (107) fixed on the side middle part of the annular plate (106), an electromagnet (108) embedded in the side edge of the annular plate (106) in a ring shape, a movable pipe sleeve (109) rotatably connected to the outer wall of the threading sleeve (107), a hydraulic pipe box (110) fixed on the inner wall top of the movable pipe sleeve (109), a spring piston rod (111) penetrating one end of the hydraulic pipe box (110) close to the annular plate (106), an ice-breaking cone (112) penetrating the bottom surface of the other end of the hydraulic pipe box (110) away from the annular plate (106), a cable detector (113) fixed on the inner wall bottom of the movable pipe sleeve (109), a bevel gear ring (114) fixed on the side edge of the movable pipe sleeve (109) close to the annular plate (106), a transmission bevel gear (115) meshingly connected to one side of the bevel gear ring (114), the output end of the driving motor (102) connected to the side of the transmission bevel gear (115) through a second gear set (116), the upper driving wheel (105) and the lower driving wheel (103) rotating towards each other and being attached to the surface of the electric cable, the electric cable penetrating the inside of the threading sleeve (107), and a pressure sensor arranged on the end surface of the threading sleeve (107).

2. 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 pipe sleeve (109), and the movable pipe sleeve (109) and the threading sleeve (107) are arranged in one-to-one.

3. 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).

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

5. The power distribution network fault detection device for a smart grid of claim 1, 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 electric cable.

6. The power distribution network fault detection device for a smart grid of claim 1, wherein: 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).

7. The power distribution network fault detection device for a smart grid of claim 1, wherein: The lower driving wheel (103) and the upper driving wheel (105) are embedded with electromagnets (4) at the center of the inside, and the inside of the lower driving wheel (103) and the upper driving wheel (105) is provided with a sliding groove (5) around the electromagnet (4).

8. A power distribution network fault detection device for a smart grid according to claim 7, characterized in that: The sliding groove (5) is embedded with movable balls (6), the inner diameter size of both ends of the sliding groove (5) is less than the outer diameter size of the movable balls (6), the movable balls (6) are embedded in sliding blocks (7), and the sliding blocks (7) are located between the movable balls (6) and the electromagnets (4).

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