Line selection device for grounding system fault

Abstract

The invention relates to the technical field of fault line selection, and provides a grounding system fault line selection device, which comprises a base, a control mechanism is arranged on the surface of the base, the control mechanism comprises a receiving module and an alarm module, a loading frame is fixedly mounted at the top of the base, a current transformer is arranged on the loading frame, and the current transformer is connected with the receiving module. The output end of the current transformer is electrically connected with a receiving module of the control mechanism, a door-shaped groove is formed in the loading frame, and the conveying device comprises a driving motor, a lower roller, a first gear, a sliding rod, an upper roller, a second gear, a holding rod, a first spring, a plurality of clamping blocks and a limiting plate. After the alarm module is started, the upper roller is moved to be separated from the cable, the resistance borne by the cable is reduced, the integrity of the cable is guaranteed while an operator pulls the cable repeatedly, and through the technical scheme, the problem that in the prior art, the cable is abraded seriously in the repeated pulling process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fault line selection, and in particular to a fault line selection device for a grounding system. Background Art

[0002] Line selection devices are usually used when the grounding system fails to ensure safe operation in the electrical system and reduce damage and danger.

[0003] The patent with patent announcement number CN219245694U relates to a fault line selection device for a small current grounding system, including a line selection box, and a line selection mechanism is installed on the inner side of the line selection box; the cable to be tested can be inserted into the current transformer on the support seat, and then the cable is inserted into the inside of the branching plate on the transmission shaft and the guide shaft for line drawing to prevent the cables from being mixed together in a disorderly manner, and then the drive motor is started, and the drive motor drives the transmission shaft to rotate. The transmission shaft makes the guide shaft at the upper end of the transmission shaft rotate in the opposite direction to the transmission shaft through the meshing limit gear, and the transmission shaft, the guide shaft and the branching plate cooperate to guide and convey the passing cable. When there is a cable fault, the current transformer feeds back an electrical signal to the PLC end of the control box, and then triggers the buzzer alarm inside the control box. Then, the worker repeatedly pulls a single cable by hand and determines the fault node, which facilitates the worker to select the line and improves work efficiency.

[0004] The above patent has the function of conveying cables for detection. The transmission shaft, guide shaft and distribution board cooperate to guide and convey the passing cables. When a fault is detected, workers determine the fault node by repeatedly pulling the cable, which effectively improves work efficiency. However, directly pulling the cable will cause friction between the cable surface and the transmission shaft and guide shaft, causing wear and damage to the cable, thereby reducing the life of the cable, causing the cable core to be exposed or broken, and further increasing maintenance costs and time. Summary of the invention

[0005] The present invention provides a line selection device for grounding system faults, which solves the problem of severe wear of cables during repeated pulling in the related art.

[0006] The technical solution of the present invention is as follows: a line selection device for grounding system faults, comprising a base, a control mechanism is arranged on the surface of the base, the control mechanism comprises a receiving module and an alarm module, a loading frame is fixedly installed on the top of the base, a current transformer is arranged on the loading frame, the output end of the current transformer is electrically connected to the receiving module of the control mechanism, a door-shaped groove is provided inside the loading frame, wherein the conveying device comprises a driving motor, a lower roller, a first gear, a sliding rod, an upper roller, a second gear, a gripping rod, a first spring, a plurality of blocks and a limit plate, the driving motor is started, the output end of the driving motor drives the lower roller to rotate clockwise, the rotation of the lower roller drives the first gear to rotate clockwise, the driving motor is fixedly installed on the surface of the loading frame close to the control mechanism, the lower roller The roller is fixedly mounted on the output end of the driving motor, the lower roller rotates and passes through the inner and outer walls of the loading frame, the No. 1 gear is fixedly mounted on the circumferential surface of the lower roller, the slide bar slides and passes through the inner and outer walls of the loading frame, the upper roller is rotatably mounted on one end of the slide bar close to the lower roller, the No. 2 gear is fixedly mounted on the circumferential surface of the upper roller, the grip bar slides and passes through the other end of the slide bar, a No. 1 spring is arranged between the grip bar and the slide bar, the grip bar stretches the No. 1 spring when moving, and the No. 1 spring is deformed by the stretching, a number of the blocks are fixedly mounted on the circumferential surface of the grip bar, the limit plate is fixedly mounted on the surface of the loading frame, the No. 1 gear is meshed with the No. 2 gear, the rotation of the No. 1 gear drives the No. 2 gear to rotate counterclockwise, and the counterclockwise rotation of the No. 2 gear drives the upper roller to rotate counterclockwise.

[0007] According to the above technical solution, the blocking blocks are symmetrically distributed with the gripping rod as the axis of symmetry, and the movement of the gripping rod drives the blocking blocks to move in the direction away from the sliding rod. The gripping rod contacts the side of the sliding rod away from the upper roller, and the gripping rod separates from the side of the sliding rod away from the upper roller during movement.

[0008] According to the above technical solution, a slot is provided on the limit plate, the block contacts the inner wall of the slot, and the block is separated from the contact surface of the slot during movement, so that the limit imposed by the limit plate on the slide bar is released.

[0009] According to the above technical scheme, the protective device includes a hollow tube, a telescopic rod, a No. 2 spring, a contact plate, a rectangular plate, a T-shaped plate and a spring sheet. The deformed No. 2 spring recovers under the action of its own elasticity. When the No. 2 spring recovers, it applies an upward thrust to the telescopic rod. The hollow tube is fixedly installed at the bottom of the inner wall of the gate-shaped groove, the telescopic rod slides through the top of the hollow tube, a No. 2 spring is arranged between the telescopic rod and the hollow tube, the contact plate is fixedly installed at the top of the telescopic rod, the rectangular plate is fixedly installed on the circumferential surface of the telescopic rod, the rectangular plate slides through the outer wall of the hollow tube, the T-shaped plate slides through the inner and outer walls of the telescopic rod, a spring sheet is arranged between the T-shaped plate and the telescopic rod, the contact plate contacts the circumferential surface of the sliding rod, the movement of the telescopic rod drives the contact plate to move upward, and the contact plate applies an upward thrust to the sliding rod during the movement.

[0010] According to the above technical solution, an arc surface 1 is provided at the bottom of the T-shaped plate, and the arc surface 1 of the T-shaped plate contacts the inner wall of the gate-shaped groove during movement, so that the loading frame applies resistance to the arc surface 1, and the T-shaped plate itself is elastic.

[0011] According to the above technical solution, a corrugation 1 is provided on the surface of the T-shaped plate away from the telescopic rod, and the corrugation 1 contacts the inner wall of the gate-shaped groove. The deformed spring sheet exerts a reaction force on the T-shaped plate under the action of its own elasticity, and the corrugation 1 is in close contact with the gate-shaped groove under the action of the reaction force.

[0012] According to the above technical scheme, the auxiliary device includes a carrying frame, a lifting plate, a No. 3 spring, a resist plate, a blocking plate and an L-shaped plate. When the rectangular plate moves upward, the pressure applied to the lifting plate gradually decreases, so that the stretched No. 3 spring recovers under the action of its own elasticity. The recovery of the No. 3 spring drives the lifting plate to move upward. The carrying frame is fixedly installed on the bottom of the inner wall of the door-shaped groove, and the lifting plate is slidably installed on the inner wall of the carrying frame. When the rectangular plate moves downward, it contacts the top of the lifting plate. The movement of the rectangular plate applies downward pressure to the lifting plate. A No. 3 spring is arranged between the lifting plate and the carrying frame. The resist plate is fixedly installed on the side of the lifting plate away from the rectangular plate. The blocking plate is fixedly installed on the inner wall of the carrying frame. The L-shaped plate is fixedly installed on the surface of the lifting plate close to the resist plate. The lifting plate contacts the rectangular plate, and the resist plate is elastic.

[0013] According to the above technical solution, an arc surface 2 is provided at one end of the push plate away from the lifting plate, and the arc surface 2 of the push plate contacts the bottom of the blocking plate during movement, so that the push plate is deformed in the direction away from the L-shaped plate due to the resistance applied by the blocking plate. An arc surface 3 is provided at one end of the L-shaped plate close to the lifting plate, and the arc surface 3 contacts the lifting plate. The push plate recovers under the action of its own elasticity, and collides with the arc surface 3 during the recovery process to generate vibration.

[0014] The working principle and beneficial effects of the present invention are:

[0015] 1. In the present invention, the surface of the card block in contact with the card slot is separated during movement, so that the limit imposed by the limit plate on the slide bar is released. By imposing a limit on the slide bar, it is ensured that the operator can adjust the position of the slide bar only after standardized operation, which helps to improve the standardization of operation. The movement of the slide bar drives the upper roller to move upward, and the surface of the upper roller in contact with the cable is separated during the movement. After the alarm module is activated, the upper roller is moved and separated from the cable, which reduces the resistance of the cable and facilitates the operator to pull repeatedly while ensuring the integrity of the cable.

[0016] 2. In the present invention, the movement of the telescopic rod drives the contact plate to move upward, and the contact plate applies an upward thrust to the sliding rod during the movement. When the sliding rod moves upward, the contact plate applies a thrust to reduce the physical burden of the staff. When the sliding rod moves downward, the contact plate applies resistance to control the speed, thereby improving the safety of the operation. When the T-shaped plate moves, friction is generated between the T-shaped plate and the loading frame. The moving speed of the T-shaped plate is slowed down by the friction. When the telescopic rod descends to the specified range, the T-shaped plate is in close contact with the gate-shaped groove to increase the resistance encountered by the telescopic rod when it moves, thereby improving the protection effect in the face of emergencies.

[0017] 3. In the present invention, when the arc surface two and the blocking plate are separated, the blocking plate recovers under the action of its own elasticity. By installing the elastic blocking plate, the blocking plate and the arc surface three can intermittently collide to generate vibration, and then the vibration is transmitted to the telescopic rod through resonance, so as to avoid the telescopic rod from getting stuck during long-term use, which helps to improve the smoothness of the overall movement. The rotation of the blocking plate is blocked by the L-shaped plate, so that the movement of the blocking plate is deformed by the resistance applied by the L-shaped plate. The L-shaped plate is used to limit the rotation of the blocking plate to one side, so that intermittent vibration can only be performed when the bottom of the blocking plate is in contact, which helps to improve the accuracy of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall half-section structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the position structure of the gate-shaped slot of the loading rack of the present invention;

[0022] Figure 4 It is a schematic diagram of the internal structure of the conveying device of the present invention;

[0023] Figure 5 For the present invention Figure 4The enlarged structural diagram at A in the middle;

[0024] Figure 6 It is a schematic diagram of the internal structure of the protective device of the present invention;

[0025] Figure 7 It is a schematic diagram of the internal structure of the auxiliary device of the present invention;

[0026] Figure 8 For the present invention Figure 7 Enlarged structural diagram at B in the middle.

[0027] In the figure: 1. base; 2. control mechanism; 3. loading frame; 4. current transformer; 5. driving motor; 6. lower roller; 7. gear No. 1; 8. slide bar; 9. upper roller; 10. gear No. 2; 11. grip bar; 12. spring No. 1; 13. block; 14. limit plate; 151. hollow tube; 152. telescopic rod; 153. spring No. 2; 154. contact plate; 155. rectangular plate; 156. T-shaped plate; 157. spring; 161. carrying frame; 162. lifting plate; 163. spring No. 3; 164. stop plate; 165. blocking plate; 166. L-shaped plate. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1 to Figure 5As shown, this embodiment proposes a line selection device for grounding system fault, including a base 1, a control mechanism 2 is arranged on the surface of the base 1, the control mechanism 2 includes a receiving module and an alarm module, a loading frame 3 is fixedly installed on the top of the base 1, a current transformer 4 is arranged on the loading frame 3, the output end of the current transformer 4 is electrically connected to the receiving module of the control mechanism 2, a door-shaped groove is opened inside the loading frame 3, and a conveying device is also included; wherein the conveying device includes a driving motor 5, a lower roller 6, a first gear 7, a sliding rod 8, an upper roller 9, a second gear 10, a gripping rod 11, a first spring 12, a plurality of blocks 13, and a limit plate 14, the driving motor 5 is fixedly installed on the surface of the loading frame 3 close to the control mechanism 2, and the lower roller 6 is fixedly installed on the output of the driving motor 5 On the end, the lower roller 6 rotates and passes through the inner and outer walls of the loading frame 3, the No. 1 gear 7 is fixedly installed on the circumferential surface of the lower roller 6, the slide bar 8 slides and passes through the inner and outer walls of the loading frame 3, the upper roller 9 is rotatably installed on the end of the slide bar 8 close to the lower roller 6, the No. 2 gear 10 is fixedly installed on the circumferential surface of the upper roller 9, the gripping rod 11 slides and passes through the other end of the slide bar 8, a No. 1 spring 12 is arranged between the gripping rod 11 and the slide bar 8, a plurality of blocks 13 are fixedly installed on the circumferential surface of the gripping rod 11, the limit plate 14 is fixedly installed on the surface of the loading frame 3, the No. 1 gear 7 is meshed with the No. 2 gear 10, and after being activated by the alarm module, the upper roller 9 is moved to separate from the cable, so that the pressure exerted by the upper roller 9 on the cable is gradually reduced, which is convenient for the operator to repeatedly pull while ensuring the integrity of the cable.

[0031] The blocks 13 are symmetrically distributed with the gripping rod 11 as the axis of symmetry. The gripping rod 11 contacts the side of the slide bar 8 away from the upper roller 9. By limiting the slide bar 8, it is ensured that the operator can adjust the position only after standardized operation, which helps to improve the safety of operation.

[0032] A slot is provided on the limit plate 14, and the block 13 contacts the inner wall of the slot. When the block 13 contacts the slot, the slide bar 8 is limited, which simplifies the limit operation and enables the operator to adjust the position of the slide bar 8 in a short time, thereby improving work efficiency.

[0033] In this embodiment, the cable is manually passed through the current transformer 4 to contact the lower roller 6, and the cable is in contact with the upper roller 9, and the drive motor 5 is started. The output end of the drive motor 5 drives the lower roller 6 to rotate clockwise, and the rotation of the lower roller 6 drives the No. 1 gear 7 to rotate clockwise, and the rotation of the No. 1 gear 7 drives the No. 2 gear 10 to rotate counterclockwise, and the counterclockwise rotation of the No. 2 gear 10 drives the upper roller 9 to rotate counterclockwise, so that the passed cable is guided for transportation. When the current transformer 4 detects a fault, it transmits information to the receiving module of the control mechanism 2. The control mechanism 2 starts the alarm module, turns off the drive motor 5, and pulls the grip 11 to move away from the slide bar 8. The grip 11 stretches the No. 1 spring 12 when moving, and the No. 1 spring 12 is stretched and deformed. At the same time, the grip 11 moves and drives the block 13 to move away from the slide bar 8. The block 13 separates from the surface in contact with the slot during the movement, so that the limit imposed on the slide bar 8 by the limit plate 14 is released. By applying a limit to the slide bar 8, it ensures that the operator The position can be adjusted only after standardized operation, and the gripping rod 11 is pushed to move upward. The movement of the gripping rod 11 drives the sliding rod 8 to move upward. The movement of the sliding rod 8 drives the upper roller 9 to move upward. The upper roller 9 is separated from the surface in contact with the cable during the movement. At the same time, the upper roller 9 moves to drive the second gear 10 to move upward. The second gear 10 is disengaged from the first gear 7 during the movement. When the gripping rod 11 moves to the predetermined position, the pulling force applied to the gripping rod 11 is reduced, so that the deformed No. 1 spring 12 is restored under the action of its own elasticity. The recovery of the No. 1 spring 12 drives the gripping rod 11 to move in the direction of the sliding rod 8. The movement of the gripping rod 11 drives the card block 13 to move in the direction of the sliding rod 8. The card block 13 contacts the inner wall of the card slot during the movement, so that the limit plate 14 limits the movement of the sliding rod 8. The staff repeatedly pulls the cable to find the fault node. After the alarm module is activated, the upper roller 9 is moved to separate from the cable to reduce the resistance of the cable, which is convenient for the operator to pull repeatedly while ensuring the integrity of the cable.

[0034] Example 2

[0035] like Figures 1 to 8As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes a protective device and an auxiliary device, the protective device includes a hollow tube 151, a telescopic rod 152, a second spring 153, a contact plate 154, a rectangular plate 155, a T-shaped plate 156 and a spring 157, the hollow tube 151 is fixedly installed at the bottom of the inner wall of the door-shaped groove, the telescopic rod 152 slides through the top of the hollow tube 151, a second spring 153 is arranged between the telescopic rod 152 and the hollow tube 151, and the contact plate 154 is fixedly installed at the top of the telescopic rod 152. The rectangular plate 155 is fixedly mounted on the circumferential surface of the telescopic rod 152, the rectangular plate 155 slides through the outer wall of the hollow tube 151, the T-shaped plate 156 slides through the inner and outer walls of the telescopic rod 152, a spring piece 157 is arranged between the T-shaped plate 156 and the telescopic rod 152, the contact plate 154 contacts the circumferential surface of the sliding rod 8, when the sliding rod 8 moves upward, the contact plate 154 applies thrust to save the staff's physical strength, when the sliding rod 8 moves downward, the contact plate 154 applies resistance to control the speed, thereby improving the applicability of the contact plate 154.

[0036] The bottom of the T-shaped plate 156 is provided with an arc surface 1, and the T-shaped plate 156 itself is elastic. By providing the arc surface 1 on the T-shaped plate 156, it is ensured that when the T-shaped plate 156 contacts the gate-shaped groove, it can move smoothly toward the telescopic rod 152, which helps to improve the stability of movement.

[0037] The surface of the T-shaped plate 156 away from the telescopic rod 152 is provided with corrugation 1, and the corrugation 1 contacts the inner wall of the gate-shaped groove. When the telescopic rod 152 descends to a specified range, the T-shaped plate 156 is in close contact with the gate-shaped groove to increase the resistance encountered by the telescopic rod 152 when moving, which helps to improve the ability to deal with emergencies.

[0038] The auxiliary device includes a carrying frame 161, a lifting plate 162, a No. 3 spring 163, a push plate 164, a blocking plate 165 and an L-shaped plate 166. The carrying frame 161 is fixedly installed on the bottom of the inner wall of the door-shaped groove, the lifting plate 162 is slidably installed on the inner wall of the carrying frame 161, and a No. 3 spring 163 is arranged between the lifting plate 162 and the carrying frame 161. The push plate 164 is fixedly installed on the side of the lifting plate 162 away from the rectangular plate 155, the blocking plate 165 is fixedly installed on the inner wall of the carrying frame 161, and the L-shaped plate 166 is fixedly installed on the surface of the lifting plate 162 close to the push plate 164. The lifting plate 162 is in contact with the rectangular plate 155, and the push plate 164 is elastic. Vibration is generated by the three intermittent collisions between the push plate 164 and the arc surface, and then the vibration is transmitted to the telescopic rod 152 through resonance, which helps to improve the smoothness of the overall movement.

[0039] The end of the support plate 164 away from the lifting plate 162 is provided with an arc surface 2, and the end of the L-shaped plate 166 close to the lifting plate 162 is provided with an arc surface 3. The arc surface 3 contacts the lifting plate 162, and is deformed by the top contact between the support plate 164 and the blocking plate 165. Intermittent vibration can only be performed when the bottom contacts, which helps to improve the accuracy of the operation.

[0040] In this embodiment, when the slide bar 8 moves upward, the pressure applied to the contact plate 154 gradually decreases, so that the deformed No. 2 spring 153 recovers under the action of its own elasticity. When the No. 2 spring 153 recovers, it applies an upward thrust to the telescopic rod 152. The telescopic rod 152 moves upward under the influence of the thrust. The movement of the telescopic rod 152 drives the contact plate 154 to move upward. During the movement, the contact plate 154 applies an upward thrust to the slide bar 8. When the slide bar 8 moves downward, it contacts the top of the contact plate 154. The slide bar 8 continues to move to push the contact plate 154 upward. 4 applies downward pressure, and the contact plate 154 moves downward under the influence of the pressure. The movement of the contact plate 154 drives the telescopic rod 152 to move downward, and the movement of the telescopic rod 152 drives the rectangular plate 155 to move downward. At the same time, the telescopic rod 152 squeezes the second spring 153 during the movement, and the second spring 153 is squeezed and deformed. The deformed second spring 153 exerts a reaction force on the telescopic rod 152 under the action of its own elasticity. The speed of the telescopic rod 152 moving downward is slowed down by the reaction force. When the contact plate 154 moves upward through the sliding rod 8, The plate 154 applies thrust to save the staff's physical strength. When the slide bar 8 moves downward, the contact plate 154 applies resistance to control the speed, thereby improving the safety of the operation. The telescopic rod 152 moves downward while driving the T-shaped plate 156 to move downward. The arc surface of the T-shaped plate 156 contacts the inner wall of the gate-shaped groove during the movement, so that the loading frame 3 applies resistance to the arc surface. The T-shaped plate 156 moves toward the telescopic rod 152 under the influence of the resistance. At the same time, the corrugation of the T-shaped plate 156 contacts the inner wall of the gate-shaped groove during the movement. The T-shaped plate 156 During the movement, the spring sheet 157 is squeezed and deformed. The deformed spring sheet 157 exerts a reaction force on the T-shaped plate 156 under the action of its own elasticity. The corrugation 1 is in close contact with the gate-shaped groove under the action of the reaction force, so that friction is generated between the T-shaped plate 156 and the loading frame 3 during the movement. The moving speed of the T-shaped plate 156 is slowed down by the friction. When the telescopic rod 152 is lowered to the specified range, the T-shaped plate 156 is in close contact with the gate-shaped groove to increase the resistance of the telescopic rod 152 during the movement, which helps to improve the protection effect.

[0041] When the rectangular plate 155 moves upward, the pressure applied to the lifting plate 162 gradually decreases, so that the stretched No. 3 spring 163 recovers under the action of its own elasticity. The recovery of No. 3 spring 163 drives the lifting plate 162 to move upward, and the movement of the lifting plate 162 drives the support plate 164 to move upward. The arc surface 2 of the support plate 164 contacts the bottom of the blocking plate 165 during the movement, so that the movement of the support plate 164 is subjected to the resistance applied by the blocking plate 165 and deforms in the direction away from the L-shaped plate 166. The support plate 164 separates from the arc surface 3 during the deformation process. When the arc surface 2 and the blocking plate 165 are separated, the support plate 164 recovers under the action of its own elasticity. During the recovery process, the support plate 164 collides with the arc surface 3 to generate vibration. Vibration is generated by the intermittent collision between the support plate 164 and the arc surface 3, and then the vibration is transmitted to the telescopic rod 152 through resonance, which helps to improve the smoothness of the overall movement. The rectangular plate 155 moves upward When moving downward, it contacts the top of the lifting plate 162, and the rectangular plate 155 moves to apply downward pressure to the lifting plate 162. The lifting plate 162 moves downward under the influence of the pressure. The lifting plate 162 stretches the No. 3 spring 163 during the movement, and the No. 3 spring 163 is deformed due to the stretching. At the same time, the movement of the lifting plate 162 drives the push plate 164 to move downward. The arc surface 2 of the push plate 164 contacts the top of the blocking plate 165 during the movement. Since the push plate 164 contacts the arc surface 3, the push plate 164 rotates upward and is blocked by the L-shaped plate 166, so that the push plate 164 continues to move and is deformed by the resistance applied by the L-shaped plate 166. When the arc surface 2 separates from the blocking plate 165, the push plate 164 recovers under the action of its own elasticity. The push plate 164 is deformed by the contact between the top of the blocking plate 165 and the bottom, and can only vibrate intermittently when it contacts, which helps to improve the accuracy of the operation.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A line selection device for grounding system fault, characterized in that: The invention comprises a base (1), a control mechanism (2) is arranged on the surface of the base (1), the control mechanism (2) comprises a receiving module and an alarm module, a loading frame (3) is fixedly mounted on the top of the base (1), a current transformer (4) is arranged on the loading frame (3), the output end of the current transformer (4) is electrically connected to the receiving module of the control mechanism (2), a door-shaped groove is provided inside the loading frame (3), and the device further comprises a conveying device, a protective device and an auxiliary device; The conveying device comprises a driving motor (5), a lower roller (6), a first gear (7), a sliding rod (8), an upper roller (9), a second gear (10), a gripping rod (11), a first spring (12), a plurality of blocks (13) and a limit plate (14); the driving motor (5) is fixedly mounted on a surface of a loading frame (3) close to a control mechanism (2); the lower roller (6) is fixedly mounted on an output end of the driving motor (5); the lower roller (6) rotates and penetrates the inner and outer walls of the loading frame (3); the first gear (7) is fixedly mounted on the circumferential surface of the lower roller (6); the sliding rod (8) is fixedly mounted on a circumferential surface of the lower roller (6); The rod (8) slides through the inner and outer walls of the loading frame (3), the upper roller (9) is rotatably mounted on one end of the sliding rod (8) close to the lower roller (6), the second gear (10) is fixedly mounted on the circumferential surface of the upper roller (9), the gripping rod (11) slides through the other end of the sliding rod (8), a first spring (12) is arranged between the gripping rod (11) and the sliding rod (8), a plurality of the blocks (13) are fixedly mounted on the circumferential surface of the gripping rod (11), the limiting plate (14) is fixedly mounted on the surface of the loading frame (3), and the first gear (7) is meshed with the second gear (10).

2. A grounding system fault line selection device according to claim 1, characterized in that: The clamping blocks (13) are symmetrically distributed with the gripping rod (11) as a symmetry axis, and the gripping rod (11) is in contact with a side of the sliding rod (8) away from the upper roller (9).

3. A grounding system fault line selection device according to claim 2, characterized in that: The limiting plate (14) is provided with a slot, and the clamping block (13) is in contact with the inner wall of the slot.

4. A grounding system fault line selection device according to claim 3, characterized in that: The protective device comprises a hollow tube (151), a telescopic rod (152), a No. 2 spring (153), a contact plate (154), a rectangular plate (155), a T-shaped plate (156) and a spring sheet (157); the hollow tube (151) is fixedly mounted on the bottom of the inner wall of the gate-shaped groove; the telescopic rod (152) slides through the top of the hollow tube (151); a No. 2 spring (153) is arranged between the telescopic rod (152) and the hollow tube (151); The plate (154) is fixedly mounted on the top of the telescopic rod (152), the rectangular plate (155) is fixedly mounted on the circumferential surface of the telescopic rod (152), the rectangular plate (155) slides through the outer wall of the hollow tube (151), the T-shaped plate (156) slides through the inner and outer walls of the telescopic rod (152), a spring sheet (157) is provided between the T-shaped plate (156) and the telescopic rod (152), and the contact plate (154) contacts the circumferential surface of the sliding rod (8).

5. A grounding system fault line selection device according to claim 4, characterized in that: The bottom of the T-shaped plate (156) is provided with an arc surface, and the T-shaped plate (156) itself is elastic.

6. A grounding system fault line selection device according to claim 5, characterized in that: The surface of the T-shaped plate (156) away from the telescopic rod (152) is provided with a corrugation 1, and the corrugation 1 is in contact with the inner wall of the gate-shaped groove.

7. A grounding system fault line selection device according to claim 6, characterized in that: The auxiliary device comprises a carrying frame (161), a lifting plate (162), a third spring (163), a stop plate (164), a blocking plate (165) and an L-shaped plate (166); the carrying frame (161) is fixedly mounted on the bottom of the inner wall of the door-shaped groove, and the lifting plate (162) is slidably mounted on the inner wall of the carrying frame (161).

8. A grounding system fault line selection device according to claim 7, characterized in that: A third spring (163) is provided between the lifting plate (162) and the carrying frame (161); the abutment plate (164) is fixedly mounted on a side of the lifting plate (162) away from the rectangular plate (155); and the blocking plate (165) is fixedly mounted on the inner wall of the carrying frame (161).

9. A grounding system fault line selection device according to claim 8, characterized in that: The L-shaped plate (166) is fixedly mounted on a surface of the lifting plate (162) close to the abutment plate (164); the lifting plate (162) is in contact with the rectangular plate (155); and the abutment plate (164) is elastic.

10. A grounding system fault line selection device according to claim 9, characterized in that: The end of the abutment plate (164) away from the lifting plate (162) is provided with a second arc surface, and the end of the L-shaped plate (166) close to the lifting plate (162) is provided with a third arc surface, and the third arc surface is in contact with the lifting plate (162).

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