A distributed small-current grounding line selection device

Abstract

The present invention relates to the technical field of power equipment, and specifically discloses a distributed small current grounding line selection device. It includes a current line selection device body, with wire grooves provided on both sides of the current line selection device body; a wire clamping device, which is used to flexibly wrap and clamp the cable inserted into the wire groove; a conductor device, which is used to guide the cable into the wire groove by rolling drive; a cleaning device, which is used to clean the dust on the surface of the cable that is about to enter the wire groove; there are multiple wire grooves, one side of the cleaning device is fixedly connected to one side of the current line selection device body, the outer side of the cleaning device is fixedly connected to one end of the conductor device, and the end of the conductor device away from the cleaning device is fixedly connected to one side of the wire clamping device. The present invention flexibly wraps and clamps the cable inserted into the wire groove by providing a wire clamping device, ensuring that the cable can be stably fixed in the wire groove, and preventing the cable from loosening.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and in particular to a distributed small current grounding line selection device. Background Art

[0002] The low-current grounding line selection device is a protective device used in the power industry. It is suitable for single-phase grounding line selection in 3kV-66kV systems with an ungrounded neutral point or neutral point grounded via a resistor or arc suppression coil. It is used in power supply systems for substations, power plants, hydropower stations, and large-scale industrial and mining enterprises such as chemical, oil, metallurgical, coal, and railway enterprises. It can indicate the line where a single-phase grounding fault has occurred. In these scenarios, when a single-phase grounding fault occurs, the low-current grounding line selection device can quickly and accurately identify the faulty line, providing a basis for timely troubleshooting, ensuring the safe and stable operation of the power system, reducing power outages, and minimizing the impact of the fault on production and life.

[0003] Although existing distributed low-current grounding line selection equipment can perform fault detection on multiple cables at the same time, when a large number of cables are inserted, some cables may become loose, resulting in poor contact between the cables and the equipment, thus affecting the detection effect. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a distributed low-current grounding line selection device, which is implemented through the following technical solutions:

[0005] A distributed low-current grounding line selection device, comprising:

[0006] A current line selection device body, wherein both sides of the current line selection device body are provided with line passage grooves;

[0007] A wire clamping device, which is used to perform flexible wrapping and clamping on the cable inserted into the wire trough;

[0008] A wire guide device, which guides the cable into the wire duct by rolling drive;

[0009] A cleaning device for cleaning dust on the surface of the cable about to enter the cable duct;

[0010] There are multiple wire-passing grooves, which are distributed on both sides of the current wire selection device body. One side of the cleaning device is fixedly connected to one side of the current wire selection device body. The cleaning device corresponds to the wire-passing grooves one by one. The outer side of the cleaning device is fixedly connected to one end of the conductor device, and the end of the conductor device away from the cleaning device is fixedly connected to one side of the wire clamping device.

[0011] Preferably, the wire clamping device comprises:

[0012] An annular short plate, wherein a hydraulic push rod is provided on the annular short plate;

[0013] An arc-shaped pressing block, which is used to push and clamp the cable inserted into the cable duct;

[0014] The cylinder body of the hydraulic push rod is fixedly connected to the outer side of the annular short plate, and the driving shaft of the hydraulic push rod passes through the annular short plate and is fixedly connected to the arc-shaped pressure block. There are multiple hydraulic push rods, and the multiple hydraulic push rods are evenly distributed on the annular short plate;

[0015] One side of the annular short plate is fixedly connected to an end of the wire device away from the cleaning device.

[0016] Preferably, the multiple arc-shaped pressure blocks are commonly fixedly connected to a corrugated sponge pad on one side away from the hydraulic push rod, an annular sleeve block is sleeved and fixedly connected to the outside of the cylinder body of the hydraulic push rod, an arc-shaped connecting rod is fixedly connected to the outside of the annular sleeve block, both ends of the arc-shaped connecting rod are fixedly connected to the outsides of two adjacent annular sleeve blocks, an inner middle part of the arc-shaped connecting rod is fixedly connected to a built-in oblique rod, and one end of the built-in oblique rod away from the arc-shaped connecting rod is fixedly connected to the outside of the annular short plate.

[0017] Preferably, the corrugated sponge pad is an annular sponge body with a corrugated vertical cross section.

[0018] Preferably, the wire guiding device includes an annular guide plate, the outer side of the annular guide plate is fixedly connected to a concave connecting rod, the outer side of the annular guide plate is fixedly connected to a curved connecting plate, the inner side of the curved connecting plate is fixedly connected to an electric push rod, the driving shaft of the electric push rod is fixedly connected to a concave connecting block, the inner side of the concave connecting block is rotatably connected to an electric roller through a rotating bolt, both sides of the concave connecting block are fixedly connected to arc scrapers, and the side of the annular guide plate close to the wire clamping device is fixedly connected to a side connecting rod.

[0019] Preferably, one end of the concave connecting rod away from the annular guide plate is fixedly connected to the outer side of the cleaning device, and one end of the side connecting rod away from the annular guide plate is fixedly connected to one side of the annular short plate.

[0020] Preferably, there are multiple concave connecting rods, and the multiple concave connecting rods are evenly distributed on the outside of the annular guide plate; there are multiple curved connecting plates, and the multiple curved connecting plates are evenly distributed on the outside of the annular guide plate away from the concave connecting rods; there are multiple side connecting rods, and the multiple side connecting rods are evenly distributed on the side of the annular guide plate close to the wire clamping device.

[0021] Preferably, the cleaning device includes an annular sponge pad, the outer side of the annular sponge pad is fixedly connected to an arc-shaped fixing block, the arc-shaped fixing block is fixedly connected to a corrugated fixing strip on the side close to the wire device, the outer side of the corrugated fixing strip is fixedly connected to a corrugated fan sheet, and a corrugated arc hole is opened on the corrugated fan sheet.

[0022] Preferably, one side of the annular sponge pad is fixedly connected to one side of the current line selection device body, one side of the arc-shaped fixing block is fixedly connected to one side of the current line selection device body, and the outer side of the arc-shaped fixing block is fixedly connected to the end of the concave connecting rod away from the wire device.

[0023] Preferably, three arc-shaped fixing blocks are provided, and the three arc-shaped fixing blocks are evenly distributed on the outside of the annular sponge pad, the corrugated sector is provided as a sector-shaped scraper with a corrugated cross-section, and a plurality of corrugated arc holes are provided.

[0024] The present invention provides a distributed low-current grounding line selection device, which has the following beneficial effects:

[0025] 1. A wire clamping device is provided to flexibly wrap and clamp the cable inserted into the wire trough, ensuring that the cable can be stably fixed in the wire trough to prevent the cable from loosening; a wire guide device is provided to guide the cable into the wire trough by rolling drive, thereby realizing automatic import and export of the cable, simple operation and low safety hazards; a cleaning device is provided to clean the dust on the surface of the cable that is about to enter the wire trough, preventing dust from entering the wire trough and affecting the detection effect of the cable.

[0026] 2. By setting the corrugated sponge pad to fold inward and shrink when it contacts the cable surface, it wraps the cable and clamps it from all sides through the pressure of the arc-shaped pressure block, preventing the cable inserted into the cable trough from loosening and affecting the detection effect; the corrugated sponge pad is flexibly clamped to the cable surface to prevent cable damage.

[0027] 3. By setting up corrugated fan blades, the surface of the moving cable is scraped and cleaned to prevent excessive dust and impurities attached to the surface of the cable from being inserted into the cable trough and affecting the connectivity with the current line selection device body; by setting up an annular sponge pad on one side of the cable trough to cover and protect the side area of the cable trough, the dust scraped off by the corrugated fan blades is prevented from being brought into the cable trough along with the movement of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a low-current grounding line selection device provided by an embodiment of the present invention;

[0029] Figure 2 Another structural diagram of a low-current grounding line selection device provided by an embodiment of the present invention;

[0030] Figure 3 Schematic diagram of the structure of the wire clamping device and the conductor device in the present invention;

[0031] Figure 4 Schematic diagram of the structure of the wire clamping device in the present invention;

[0032] Figure 5 It is a structural schematic diagram of the wire device and the cleaning device in the present invention;

[0033] Figure 6 Schematic diagram of the structure of the conductor device in the present invention;

[0034] Figure 7 It is a structural schematic diagram of the cleaning device and the current line selection device body in the present invention;

[0035] Figure 8 It is a schematic diagram of the partial structure of the cleaning device in the present invention.

[0036] In the figure: 1. Current line selection device body; 2. Wire trough; 3. Wire clamping device; 4. Conductor device; 5. Cleaning device; 301. Annular short plate; 302. Hydraulic push rod; 303. Arc pressure block; 304. Corrugated sponge pad; 305. Annular sleeve block; 306. Arc connecting rod; 307. Built-in oblique rod; 401. Annular guide plate; 402. Concave connecting rod; 403. Curved connecting plate; 404. Electric push rod; 405. Concave connecting block; 406. Electric roller; 407. Arc scraper; 408. Side connecting rod; 501. Annular sponge pad; 502. Arc fixing block; 503. Corrugated fixing bar; 504. Corrugated fan blade; 505. Corrugated arc hole. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 4 The embodiment of the present invention provides a distributed low-current grounding line selection device, including:

[0039] The current line selection device body 1 has line passage grooves 2 on both sides of the current line selection device body 1;

[0040] The wire clamping device 3 is used to perform flexible wrapping clamping and fixing of the cable inserted into the wire trough 2;

[0041] The wire guide device 4 guides the cable into the wire duct 2 by rolling drive;

[0042] The cleaning device 5 is used to clean the dust on the surface of the cable that is about to enter the cable duct 2;

[0043] There are multiple wire-through grooves 2, and the multiple wire-through grooves 2 are distributed on both sides of the current line selection device body 1. One side of the cleaning device 5 is fixedly connected to one side of the current line selection device body 1. The cleaning device 5 corresponds to the wire-through grooves 2 one by one, that is, the number of the two is the same. The outer side of the cleaning device 5 is fixedly connected to one end of the wire device 4, and the end of the wire device 4 away from the cleaning device 5 is fixedly connected to one side of the wire clamping device 3.

[0044] It should be noted that, regarding the internal structure and electrical principles of the current line selection device body 1, reference can be made to the existing small current grounding line selection equipment. The embodiment of the present invention does not elaborate on this in detail. The embodiment of the present invention only improves the connection part between the wire groove 2 of the current line selection device body 1 and the cable.

[0045] In a specific implementation, the wire clamping device 3 includes:

[0046] An annular short plate 301, on which a hydraulic push rod 302 is provided;

[0047] The arc-shaped pressing block 303 is used to push and clamp the cable inserted into the cable duct 2;

[0048] The cylinder of the hydraulic push rod 302 is fixedly connected to the outer side of the annular short plate 301. The driving shaft of the hydraulic push rod 302 passes through the annular short plate 301 and is fixedly connected to the arc-shaped pressure block 303. There are multiple hydraulic push rods 302, and the multiple hydraulic push rods 302 are evenly distributed on the annular short plate 301.

[0049] One side of the annular short plate 301 is fixedly connected to the end of the wire device 4 away from the cleaning device 5;

[0050] A plurality of arc-shaped pressure blocks 303 are fixedly connected to a corrugated sponge pad 304 on one side away from the hydraulic push rod 302. An annular sleeve block 305 is sleeved and fixedly connected to the outer side of the cylinder body of the hydraulic push rod 302. An arc-shaped connecting rod 306 is fixedly connected to the outer side of the annular sleeve block 305. The two ends of the arc-shaped connecting rod 306 are fixedly connected to the outer sides of two adjacent annular sleeve blocks 305. The inner middle side of the arc-shaped connecting rod 306 is fixedly connected to a built-in oblique rod 307. The end of the built-in oblique rod 307 away from the arc-shaped connecting rod 306 is fixedly connected to the outer side of the annular short plate 301.

[0051] The corrugated sponge pad 304 is an annular sponge body with a corrugated vertical cross section.

[0052] When a cable fault needs to be detected, the cable is inserted through the wire clamping device 3 into the conductor assembly 4. The conductor assembly 4 then rolls the cable into the wire trough 2, whereupon the current line selection device 1 performs fault detection on the cable. Once the cable enters the wire trough 2 and connects to the current line selection device 1, the wire clamping device 3 secures it with a flexible, wrapping clamp. Dust is also removed from the cable's surface as it passes through the cleaning device 5. When the cable needs to be removed from the wire trough 2, the wire clamping device 3 releases the cable's grip, and the rolling contact of the conductor assembly 4 allows the cable to be removed from the trough 2.

[0053] Specifically, after the cable is inserted into the wire trough 2 and connected with the current line selection device body 1, the hydraulic push rod 302 pushes the arc-shaped pressing block 303 to move toward the center direction of the annular short plate 301. When the arc-shaped pressing block 303 moves, it pushes the corrugated sponge pad 304 inside it to fold and shrink inward and contact the cable surface. When the corrugated sponge pad 304 folds and shrinks inward and contacts the cable surface, it wraps the cable and clamps it from all sides through the pressure of the arc-shaped pressing block 303, preventing the cable inserted into the wire trough 2 from loosening, resulting in poor contact between the cable and the current line selection device body 1 and affecting the detection effect. A flexible corrugated sponge pad 304 is provided on the inner side of the arc pressure block 303 to directly contact the cable surface for flexible clamping, thereby preventing the arc pressure block 303 from causing hard friction with the cable surface when hard squeezing and clamping the cable surface, thereby causing damage to the cable; the arc pressure block 303 is driven by the driving shaft of the hydraulic push rod 302 to adjust and move outward or inward to adapt to cables of different apertures; an annular sleeve block 305 is sleeved on the outer side of the hydraulic push rod 302 and fixedly connected to the annular short plate 301 through the arc connecting rod 306 and the built-in inclined rod 307, thereby preventing the hydraulic push rod 302 from shaking when driving the driving shaft due to the influence of external force.

[0054] See also Figures 1-8The wire guide device 4 includes an annular guide plate 401, the outer side of the annular guide plate 401 is fixedly connected to a concave connecting rod 402, the outer side of the annular guide plate 401 is fixedly connected to a curved connecting plate 403, the inner side of the curved connecting plate 403 is fixedly connected to an electric push rod 404, the driving shaft of the electric push rod 404 is fixedly connected to a concave connecting block 405, the inner side of the concave connecting block 405 is rotatably connected to an electric roller 406 through a rotating bolt, and both sides of the concave connecting block 405 are fixedly connected to an arc scraper 407. The side of the annular guide plate 401 close to the wire clamping device 3 is fixedly connected to a side connecting rod 408, and the concave connecting One end of the rod 402 away from the annular guide plate 401 is fixedly connected to the outside of the cleaning device 5, and the end of the side connecting rod 408 away from the annular guide plate 401 is fixedly connected to one side of the annular short plate 301. There are four concave connecting rods 402, and the four concave connecting rods 402 are evenly distributed on the outside of the annular guide plate 401. There are four curved connecting plates 403, and the four curved connecting plates 403 are evenly distributed on the outside of the annular guide plate 401 away from the concave connecting rod 402. There are four side connecting rods 408, and the four side connecting rods 408 are distributed on the side of the annular guide plate 401 close to the wire clamping device 3.

[0055] The cleaning device 5 includes an annular sponge pad 501, and an arc-shaped fixing block 502 is fixedly connected to the outer side of the annular sponge pad 501. The side of the arc-shaped fixing block 502 close to the conductor device 4 is fixedly connected to a corrugated fixing strip 503, and the outer side of the corrugated fixing strip 503 is fixedly connected to a corrugated fan piece 504. The corrugated fan piece 504 is provided with a corrugated arc hole 505. One side of the annular sponge pad 501 is fixedly connected to one side of the current line selection device body 1, and one side of the arc-shaped fixing block 502 is fixedly connected to one side of the current line selection device body 1. The outer side of the arc-shaped fixing block 502 is fixedly connected to one end of the concave connecting rod 402 away from the annular guide plate 401. There are three arc-shaped fixing blocks 502, and the three arc-shaped fixing blocks 502 are evenly distributed on the outer side of the annular sponge pad 501. The corrugated fan piece 504 is set as a fan-shaped scraper with a corrugated cross-section. There are three corrugated fan pieces 504, and there are multiple corrugated arc holes 505.

[0056] When in use, when the cable passes through the corrugated sponge pad 304 and is not clamped, the electric push rod 404 drives the driving shaft to drive the electric roller 406 inside the concave connecting block 405 to move inward, and the four electric rollers 406 contact the cable from all sides and apply a certain extrusion force to it through the electric push rod 404 to keep in close contact with it, and the rolling of the electric roller 406 drives the cable to move into the annular guide plate 401. The cable passes through the annular guide plate 401 and the cleaning device 5 in turn and enters the wire groove 2 as the electric roller 406 rolls. The annular guide plate 401 is set between the electric roller 406 and the cleaning device 5 to limit the moving cable to a certain area, so as to prevent the electric roller 406 from driving the cable. The movable cable is affected by gravity and has a large drooping angle, which makes it difficult for it to pass through the cleaning device 5 smoothly. The driving shaft of the electric push rod 404 drives the concave connecting block 405 to move, so that the electric roller 406 can perform a fitting rolling guidance for cables with different apertures, preventing the electric roller 406 from being difficult to adjust to a state of tight fit with the cable when fault detection of cables with different apertures is required. When the electric roller 406 rotates, the arc-shaped scrapers 407 on both sides of the concave connecting block 405 are in contact with its surface at all times. The arc-shaped scrapers 407 can scrape and clean the surface of the rotating electric roller 406, preventing the electric roller 406 from being attached to too much dust and impurities after long-term use and affecting its use effect. The cable needs to be removed from the through line When the cable is pulled out from the slot 2, the electric roller 406 can be reversed to pull the cable out of the cable slot 2 by rolling in close contact, thereby realizing automatic cable removal and avoiding the problem of safety hazards to the staff when pulling out due to cable failure; the electric roller 406 drives the cable from the annular guide plate 401 through the three corrugated fan blades 504 and the annular sponge pad 501 in sequence through the rolling in close contact. When the cable passes through the three corrugated fan blades 504, the inner side of the corrugated fan blades 504 is in contact with the cable surface at all times, and the three corrugated fan blades 504 are used to scrape and clean the surface of the moving cable, thereby preventing excessive dust and impurities attached to the cable surface from being inserted into the cable slot 2 and affecting the connection effect with the current line selection device body 1. ; The dust and impurities scraped off fall outward through the wavy arc hole 505 and are discharged; when the aperture of the cable is larger than the inner diameter of the circular ring formed by the three wavy fan blades 504, the cable will push the wavy fan blades 504 toward the annular sponge pad 501 to undergo a certain bending deformation, and the wavy fixing strips 503 on one side of the arc-shaped fixing block 502 can stabilize the wavy fan blades 504 to prevent the wavy fan blades 504 from undergoing large-scale bending deformation when pushed by the cable, which affects the cleaning effect of the cable; by arranging an annular sponge pad 501 on one side of the cable trough 2, the side area of the cable trough 2 is covered and protected to prevent the dust scraped off by the wavy fan blades 504 from being brought into the cable trough 2 and accumulating as the cable moves.

[0057] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A distributed low-current grounding line selection device, characterized in that: include: A current line selection device body (1), wherein both sides of the current line selection device body (1) are provided with line passage grooves (2); A wire clamping device (3), the wire clamping device (3) is used to perform flexible wrapping clamping and fixing on the cable inserted into the wire duct (2); A wire guide device (4), wherein the wire guide device (4) guides the cable into the interior of the wire duct (2) by rolling drive; A cleaning device (5), the cleaning device (5) is used to clean dust on the surface of the cable about to enter the cable duct (2); The wire grooves (2) are provided in plurality, and the plurality of wire grooves (2) are distributed on both sides of the current line selection device body (1); one side of the cleaning device (5) is fixedly connected to one side of the current line selection device body (1); the cleaning device (5) corresponds to the wire grooves (2) one by one; the outer side of the cleaning device (5) is fixedly connected to one end of the conductor device (4); and the end of the conductor device (4) away from the cleaning device (5) is fixedly connected to one side of the clamping device (3); The wire guide device (4) comprises an annular guide plate (401), the outer side of the annular guide plate (401) is fixedly connected to a concave connecting rod (402), the outer side of the annular guide plate (401) is fixedly connected to a curved connecting plate (403), the inner side of the curved connecting plate (403) is fixedly connected to an electric push rod (404), the driving shaft of the electric push rod (404) is fixedly connected to a concave connecting block (405), the inner side of the concave connecting block (405) is rotatably connected to an electric roller (406) via a rotating bolt, both sides of the concave connecting block (405) are fixedly connected to arc scrapers (407), and the side of the annular guide plate (401) close to the wire clamping device (3) is fixedly connected to a side connecting rod (408).

2. The distributed low-current grounding line selection device according to claim 1, characterized in that: The wire clamping device (3) comprises: An annular short plate (301), wherein a hydraulic push rod (302) is provided on the annular short plate (301); An arc-shaped pressing block (303), the arc-shaped pressing block (303) is used to push and clamp the cable inserted into the cable duct (2); The cylinder of the hydraulic push rod (302) is fixedly connected to the outer side of the annular short plate (301), and the driving shaft of the hydraulic push rod (302) passes through the annular short plate (301) and is fixedly connected to the arc-shaped pressure block (303). A plurality of hydraulic push rods (302) are provided, and the plurality of hydraulic push rods (302) are evenly distributed on the annular short plate (301); One side of the annular short plate (301) is fixedly connected to an end of the wire guide device (4) away from the cleaning device (5).

3. The distributed low-current grounding line selection device according to claim 2, characterized in that: The plurality of arc-shaped pressure blocks (303) are fixedly connected to a corrugated sponge pad (304) on one side away from the hydraulic push rod (302); an annular sleeve block (305) is sleeved and fixedly connected to the outer side of the cylinder body of the hydraulic push rod (302); an arc-shaped connecting rod (306) is fixedly connected to the outer side of the annular sleeve block (305); both ends of the arc-shaped connecting rod (306) are fixedly connected to the outer sides of two adjacent annular sleeve blocks (305); a built-in oblique rod (307) is fixedly connected to the inner middle part of the arc-shaped connecting rod (306); and one end of the built-in oblique rod (307) away from the arc-shaped connecting rod (306) is fixedly connected to the outer side of the annular short plate (301).

4. The distributed low-current grounding line selection device according to claim 3, characterized in that: The corrugated sponge pad (304) is an annular sponge body with a corrugated vertical cross section.

5. The distributed low-current grounding line selection device according to claim 1, characterized in that: One end of the concave connecting rod (402) away from the annular guide plate (401) is fixedly connected to the outside of the cleaning device (5), and one end of the side connecting rod (408) away from the annular guide plate (401) is fixedly connected to one side of the annular short plate (301).

6. The distributed low-current grounding line selection device according to claim 1, characterized in that: There are multiple concave connecting rods (402), and the multiple concave connecting rods (402) are evenly distributed outside the annular guide plate (401); there are multiple curved connecting plates (403), and the multiple curved connecting plates (403) are evenly distributed outside the annular guide plate (401) at a location away from the concave connecting rods (402); there are multiple side connecting rods (408), and the multiple side connecting rods (408) are evenly distributed on a side of the annular guide plate (401) close to the wire clamping device (3).

7. The distributed low-current grounding line selection device according to claim 1, characterized in that: The cleaning device (5) comprises an annular sponge pad (501), the outer side of the annular sponge pad (501) is fixedly connected to an arc-shaped fixing block (502), the side of the arc-shaped fixing block (502) close to the wire device (4) is fixedly connected to a corrugated fixing strip (503), the outer side of the corrugated fixing strip (503) is fixedly connected to a corrugated fan (504), and the corrugated fan (504) is provided with a corrugated arc hole (505).

8. The distributed low-current grounding line selection device according to claim 7, characterized in that: One side of the annular sponge pad (501) is fixedly connected to one side of the current line selection device body (1), one side of the arc-shaped fixing block (502) is fixedly connected to one side of the current line selection device body (1), and the outer side of the arc-shaped fixing block (502) is fixedly connected to one end of the concave connecting rod (402) away from the conductor device (4).

9. The distributed low-current grounding line selection device according to claim 7, characterized in that: Three arc-shaped fixing blocks (502) are provided, and the three arc-shaped fixing blocks (502) are evenly distributed outside the annular sponge pad (501); the corrugated fan blade (504) is provided as a fan-shaped scraper blade with a corrugated cross section; and a plurality of corrugated arc holes (505) are provided.

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