Ring main unit cable head pulling device

Abstract

The utility model discloses power equipment, and particularly relates to a ring main unit cable head pulling device, which is characterized by comprising an end bracket, a middle bracket, a screw rod, a rotating shaft head and a hook and loop fastener, a screw hole is formed in the middle support, the screw rod is in threaded connection with the screw hole, the two ends of the screw rod extend out of the screw hole respectively, the rotating shaft head is rotationally connected to one end of the screw rod, and the hook-and-loop fastener is arranged in the rotating shaft head in a penetrating mode; the number of the end supports is two, the two end supports are located at the two opposite ends of the middle support, the end supports are connected to the middle support in a sliding mode, and the end supports are used for being connected with a ring main unit. According to the utility model, the two end supports are connected with the middle support in a sliding manner, so that the length of the middle support can be changed, and the application range of the ring main unit cable head pulling device is enlarged.

Description

Technical Field

[0001] The utility model relates to the field of power equipment, in particular to a cable head extraction device for a ring main unit. Background Art

[0002] In power maintenance work, it is often necessary to pull out the cable head from the ring main unit for cable testing or cable head replacement.

[0003] An existing cable head auxiliary extraction tool includes a U-shaped frame, a screw rod and a sticky tape. The two ends of the U-shaped frame are used to abut against the ring main unit. A threaded hole is provided on the U-shaped frame. The screw rod is threadedly connected to the threaded hole and extends into the opening of the U-shaped frame. The screw rod extends from the opening of the U-shaped frame into the ring main unit. A sticky tape is fixed to the end of the screw rod extending into the ring main unit. The sticky tape is used to bond the cable head. By rotating the screw rod, the sticky tape is driven to move axially along the screw rod, and then the cable head is taken out.

[0004] However, the size of the U-shaped frame of the existing cable head auxiliary extraction tool is fixed, and the applicable range is small. Summary of the Utility Model

[0005] An embodiment of the utility model provides a cable head extraction device for a ring main unit to solve the problem that the size of the U-shaped frame of the existing cable head auxiliary extraction tool is fixed and the applicable range is small.

[0006] An embodiment of the utility model provides a cable head extraction device for a ring main unit, including an end bracket, a middle bracket, a screw rod, a rotary shaft head and a sticky tape;

[0007] A threaded hole is provided on the middle bracket. The screw rod is threadedly connected to the threaded hole. The two ends of the screw rod respectively extend out of the threaded hole. The rotary shaft head is rotatably connected to one end of the screw rod. The rotary shaft head rotates around the axis of the screw rod. The sticky tape is threaded through the rotary shaft head;

[0008] There are two end brackets. The two end brackets are located at opposite ends of the middle bracket. The end brackets are slidably connected to the middle bracket. The end brackets are used to connect to the ring main unit.

[0009] Optionally, the middle bracket includes a first nut, a square tube and a sleeve. Coaxial first through hole and second through hole are respectively provided on opposite two side surfaces of the square tube. The sleeve is threaded through the first through hole and the second through hole. The two ends of the sleeve extend out of the first through hole and the second through hole. One end of the sleeve is turned outwards to form a folded edge. The folded edge overlaps on the outer surface of the square tube. The other end of the sleeve is provided with an external thread. The first nut is threadedly connected to the external thread. An internal thread is provided in the inner hole of the sleeve to form the threaded hole;

[0010] One of the end brackets can extend into one end of the square tube, and the other end bracket can extend into the other end of the square tube. The two end brackets can slide relative to the square tube, approaching or moving away from each other.

[0011] Optionally, the end bracket includes a magnet, a threaded rod, a square rod, and a vertical rod. The square rod is perpendicular to the vertical rod. One end of the square rod is disposed inside the square tube so that the square rod can slide inside the square tube, and the other end of the square rod is connected to the vertical rod.

[0012] A first threaded hole is provided on the square rod, and a second threaded hole is provided on the vertical rod. The first threaded hole and the second threaded hole are communicated and coaxial. The threaded rod is threadedly connected to the first threaded hole and the second threaded hole, and the length of the threaded rod is greater than the sum of the depths of the first threaded hole and the second threaded hole.

[0013] The magnet is fixed to one end of the screw rod away from the square rod. The magnet is cylindrical, and the cross-sectional area of the magnet is less than or equal to the cross-sectional area of the second threaded hole.

[0014] Optionally, a slide rail is provided inside the square tube, and a slider is provided on the end bracket. The slider is slidably connected to the slide rail. The sliding direction of the slider is the same as the sliding direction of the end bracket, and the slide rail extends along the sliding direction of the end bracket.

[0015] Optionally, the slide rail includes a first plate, a second plate, and a third plate. The two opposite sides of the first plate are respectively connected to the second plate and the third plate. The side of the second plate away from the first plate is fixedly connected to the inner wall of the square tube, and the side of the third plate away from the first plate is fixedly connected to the inner wall of the square tube. The first plate, the second plate, the third plate, and the square tube enclose an inner cavity with a square cross-section.

[0016] The slider is in the shape of a square strip, and the length direction of the slider is parallel to the length direction of the square tube. The slider is placed in the inner cavity so that the slider is slidably connected to the slide rail.

[0017] Optionally, a gear is provided on the outer periphery of the sleeve, and the gear is disposed inside the square tube; a rack is provided on the end bracket, and the rack extends along the length direction of the square tube. The gear meshes between the racks of the two end brackets.

[0018] Optionally, a stabilizing ring is provided on the vertical rod. The stabilizing ring is disposed around the outer wall of the vertical rod. A stabilizing foot is provided on the side of the stabilizing ring away from the square tube. The stabilizing foot is in the shape of a cylinder and is disposed around the outer edge of the stabilizing ring. The stabilizing foot and the vertical rod are spaced apart.

[0019] Optionally, a ring groove is provided at the end of the vertical rod away from the square rod, the opening of the ring groove faces away from the square rod, and an anti-slip pad is provided in the ring groove, and the anti-slip pad is used to increase the friction between the vertical rod and the ring main cabinet.

[0020] Optionally, the middle bracket further includes a second nut, the second nut is threadedly connected to the external thread, and the second nut is arranged on the side of the first nut away from the folded edge.

[0021] Optionally, the end bracket includes a magnet, a square rod and a vertical rod, the square rod is perpendicular to the vertical rod, one end of the square rod is arranged in the square tube so that the square rod can slide in the square tube, and the other end of the square rod is connected to the vertical rod;

[0022] The magnet is fixed at one end of the vertical rod away from the square rod.

[0023] The embodiment of the present utility model provides a device for extracting the cable head of a ring main cabinet. First, pull out the end bracket from the middle bracket to extend the length of the middle bracket, fix the end bracket on the ring main cabinet, connect the sticky tape to the cable head, and then rotate the screw rod to pull out the cable head. Since the position of the end bracket relative to the middle bracket is adjustable, the size of the whole formed by the end bracket and the middle bracket is adjustable, and thus it can be adapted to a narrower ring main cabinet. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is an overall schematic diagram of the device for extracting the cable head of a ring main cabinet in an embodiment of the present utility model;

[0026] Figure 2 It is a side view of the device for extracting the cable head of a ring main cabinet in an embodiment of the present utility model;

[0027] Figure 3 It is Figure 2 The sectional three-dimensional structure schematic diagram at A-A in

[0028] Figure 4 It is Figure 2 The sectional three-dimensional structure schematic diagram at B-B in

[0029] Figure 5 It is a structural schematic diagram of the end bracket of the device for extracting the cable head of a ring main cabinet in an embodiment of the present utility model.

[0030] Reference numerals: 1, middle bracket; 11, square tube; 12, sleeve; 13, first nut; 14, second nut; 15, support plate; 2, end bracket; 21, square rod; 211, first threaded hole; 22, vertical rod; 222, second threaded hole; 23, stabilizing ring; 24, stabilizing foot; 25, annular groove; 26, anti-slip pad; 27, rack; 28, slider; 29, threaded rod; 291, second handle; 3, screw; 31, first handle; 4, rotating shaft head; 5, sticky tape; 6, slide rail; 61, first plate; 62, second plate; 63, third plate; 64, inner cavity; 7, magnet. Detailed implementation manners

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] Refer to Figures 1 to 3, in an embodiment of the present utility model, a cable head extraction device for a ring main unit is disclosed, which includes an end bracket 2, a middle bracket 1, a screw 3, a rotating shaft head 4 and a sticky tape 5. A screw hole is provided on the middle bracket 1, the screw 3 is threadedly connected to the screw hole, both ends of the screw 3 extend out of the screw hole respectively, the rotating shaft head 4 is rotatably connected to one end of the screw 3, and the rotating shaft head 4 rotates around the axis of the screw 3 as in the prior art. The sticky tape 5 is threaded through the rotating shaft head 4. After the sticky tape 5 is connected to the cable head, the screw 3 is rotated, and the screw 3 drives the rotating shaft head 4 to move away from the sticky tape 5 while rotating, thereby removing the cable head.

[0035] There are two end brackets 2, and the two end brackets 2 are located at opposite ends of the middle bracket 1. The end brackets 2 are slidably connected to the middle bracket 1, and the end brackets 2 are used to connect to the ring main unit.

[0036] In this embodiment, first, the end bracket 2 is pulled out from the middle bracket 1 to extend the length of the middle bracket 1. The end bracket 2 is fixed to the ring main unit, and the sticky tape 5 is connected to the cable head. Then, by rotating the screw 3, the cable head can be pulled out. Since the position of the end bracket 2 relative to the middle bracket 1 is adjustable, the overall size formed by the end bracket 2 and the middle bracket 1 is adjustable, and thus it can be adapted to a narrower ring main unit.

[0037] Refer to Figure 1 、 Figure 4 and Figure 5 , as an example, the middle bracket 1 includes a first nut 13, a square tube 11 and a sleeve 12. Coaxial first through hole and second through hole are respectively provided on opposite side surfaces of the square tube 11. The sleeve 12 is threaded through the first through hole and the second through hole. Both ends of the sleeve 12 extend out of the first through hole and the second through hole. Internal threads are provided in the inner hole of the sleeve 12 to form a screw hole. One end of the sleeve 12 is folded outward to form a folded edge, and the folded edge overlaps on the outer surface of the square tube 11. External threads are provided at the other end of the sleeve 12, and the first nut 13 is threadedly connected to the external threads on the sleeve 12.

[0038] The screw 3 is threadedly connected to the sleeve 12, and the sleeve 12 is limited by the first nut 13 and the folded edge, so that the position of the sleeve 12 relative to the middle bracket 1 remains unchanged. In this application, the sleeve 12 can be disassembled from the middle bracket 1 for replacement. When the internal threads of the sleeve 12 are damaged, the first nut 13 is unscrewed, the folded edge is clamped by fingers, and the sleeve 12 is pulled out from the middle bracket 1 for replacement.

[0039] Each end bracket 2 can extend into the square tube 11 from one end of the square tube 11, so that the two end brackets 2 can slide away from or close to each other relative to the inner wall of the square tube 11. In other words, the two end brackets 2 are both slidably connected to the square tube 11, and the two end brackets 2 can approach or move away from each other. The sliding direction of the end bracket 2 is the length direction of the square tube 11.

[0040] Referring to Figure 4 and Figure 5 , as an example, the end bracket 2 includes a magnet 7, a threaded rod 29, a square rod 21 and a vertical rod 22. The square rod 21 is perpendicular to the vertical rod 22. One end of the square rod 21 is arranged inside the square tube 11 so that the square rod 21 can slide inside the square tube 11, and the other end of the square rod 21 is connected to the vertical rod 22;

[0041] A first threaded hole 211 is provided on the square rod 21, and a second threaded hole 222 is provided on the vertical rod 22. The first threaded hole 211 and the second threaded hole 222 are communicated and coaxial. The threaded rod 29 is threadedly connected to the first threaded hole 211 and the second threaded hole 222. The length of the threaded rod 29 is greater than the sum of the depths of the first threaded hole 211 and the second threaded hole 222. The magnet 7 is fixed to the end of the screw rod 3 away from the square rod 21, and the cross-sectional area of the magnet 7 is less than or equal to the cross-sectional area of the second threaded hole 222.

[0042] In this embodiment, the end bracket 2 is slidably connected to the square tube 11 through the square rod 21, and the vertical rod 22 is arranged on the side of the square rod 21 close to the rotary shaft head 4. The axial direction of the vertical rod 22 is parallel to the axial direction of the screw rod 3. The end bracket 2 is adsorbed on the ring main unit through the magnet 7, and the magnet 7 is a strong magnet 7.

[0043] In the prior art, the magnet 7 is generally fixed on the vertical rod 22. When removing the end bracket 2 from the ring main unit, the end bracket 2 is usually pulled off manually to overcome the suction force between the magnet 7 and the ring main unit. In this embodiment, the threaded rod 29 is threadedly connected to the vertical rod 22 and the square rod 21. After the threaded rod 29 rotates, it can drive the magnet 7 to move away from or close to the ring main unit. In this embodiment, it is relatively simple and labor-saving to disengage from the ring main unit.

[0044] As an example, in this embodiment, a first handle 31 is fixed to the end of the screw rod 3 away from the rotary shaft head 4, and a second handle 291 is fixed to the end of the threaded rod 29 away from the magnet 7. The first handle 31 facilitates the rotation of the screw rod 3 by personnel, and the second handle 291 facilitates the rotation of the threaded rod 29 by personnel.

[0045] Referring to Figure 3 and Figure 4, in this embodiment, a slide rail 6 is arranged inside the square tube 11, and a slider 28 is arranged on the end bracket 2. The slide rail 6 is slidably connected to the slider 28. In this embodiment, the sliding connection of the end bracket 2 relative to the middle bracket 1 is further defined by the slide rail 6 and the slider 28, and the sliding route of the end bracket 2 can be further defined.

[0046] Specifically, the slide rail extends along the length direction of the square tube 11. The slide rail 6 includes a first plate 61, a second plate 62 and a third plate 63. The first plate 61, the second plate 62 and the third plate 63 also extend along the length direction of the square tube 11. The two opposite sides of the first plate 61 are respectively connected to the second plate 62 and the third plate 63. The side of the second plate 62 away from the first plate 61 is fixedly connected to the inner wall of the square tube 11, and the side of the third plate 63 away from the first plate 61 is fixedly connected to the inner wall of the square tube 11. The first plate 61, the second plate 62, the third plate 63 and the square tube 11 enclose an inner cavity 64 with a square cross-section, and both ends of the cavity parallel to the length direction of the square tube 11 are open.

[0047] In other embodiments, the slide rail 6 is cylindrical, the cross-section of the inner cavity 64 of the slide rail 6 is square, and the slide rail 6 is directly fixed on the side wall of the square tube 11.

[0048] In other embodiments, one end of the slide rail 6 in the length direction has only one opening. The slider 28 extends into the slide rail 6 from this opening and is slidably connected to the slide rail 6. The sliding path of the slider 28 in the slide rail 6 is less than the length of the inner cavity 64 of the slide rail 6.

[0049] A support plate 15 is arranged on the slide rail 6. A reserved groove is arranged on the support plate 15. The reserved groove has three side walls. One side wall of the reserved groove fits the outer surface of the first plate 61, one side wall of the reserved groove fits the outer surface of the second plate 62, and one side wall of the reserved groove fits the outer surface of the third plate 63, so that the first plate 61, the second plate 62 and the third plate 63 are all embedded in the reserved groove. The support plate 15 is arranged in the inner cavity 64 of the square tube 11, and the four outer edges of the support plate 15 are respectively connected to the four side walls of the inner cavity 64. The support plate 15 is used to reinforce the structural strength of the square tube 11.

[0050] The slider 28 is in the shape of a square strip, the length direction of the slider 28 is parallel to the length direction of the square tube 11, and the slider 28 is placed in the inner cavity 64 so that the slider 28 is slidably connected to the slide rail 6.

[0051] Refer to Figure 3 , as an example, a plurality of first teeth are arranged around the sleeve 12 to form a gear. The plurality of first teeth are arranged inside the square tube 11; a rack 27 is arranged on the end bracket 2. The rack 27 extends along the length direction of the square tube 11. The rack 27 meshes with the gear, and the racks 27 on the two end brackets 2 are respectively arranged on the opposite sides of the gear.

[0052] The meshing of the gear and the rack 27 has the following effects: First, the two end brackets 2 are simultaneously meshed with the gear. When the gear rotates, it can drive the two racks 27 to displace simultaneously, so that the two end brackets 2 move the same distance at the same time. Second, in this embodiment, when the first nut 13 rotates until it clamps the square tube 11 with the hem, the frictional force between the first nut 13 and the square tube 11 can lock the sleeve 12, so that the sleeve 12 no longer rotates, and thus temporarily keep the position of the end bracket 2 relative to the middle bracket 1 unchanged.

[0053] As an example, a stabilizing ring 23 is provided on the vertical rod 22. The stabilizing ring 23 is arranged around the outer wall of the vertical rod 22. A stabilizing foot 24 is provided on the side of the stabilizing ring 23 away from the square tube 11. The stabilizing foot 24 is in a cylindrical shape and is arranged around the outer edge of the stabilizing ring 23. The stabilizing foot 24 and the vertical rod 22 are arranged at intervals.

[0054] In this embodiment, the stabilizing ring 23 is in a ring-shaped sheet form. The inner edge of the stabilizing ring 23 is fixed on the outer surface of the vertical rod 22. The stabilizing foot 24 is arranged on the outer edge of the stabilizing ring 23. By the stabilizing foot 24, the contact area between the vertical rod 22 and the ring cabinet is increased, so that the end bracket 2 is stably arranged on the ring cabinet.

[0055] As an example, a ring groove 25 is provided at the end of the vertical rod 22 away from the square rod 21. The opening of the ring groove 25 faces away from the square rod 21. An anti-slip pad 26 is arranged in the ring groove 25. The anti-slip pad 26 is used to increase the frictional force between the vertical rod 22 and the ring cabinet.

[0056] As an example, the locking assembly further includes a second nut 14. The second nut 14 is threadedly connected to the external thread. The second nut 14 is arranged on the side of the first nut 13 away from the hem. In this embodiment, the second nut 14 and the first nut 13 form a double-nut structure. After the first nut 13 clamps the square tube 11 with the hem, the second nut 14 rotates so that the second nut 14 moves towards the square tube 11, and the loosening between the first nut 13 and the second nut 14 is reduced through the double-nut structure.

[0057] In other embodiments, the end bracket 2 includes a magnet 7, a square rod 21 and a vertical rod 22. The square rod 21 is perpendicular to the vertical rod 22. One end of the square rod 21 is arranged in the square tube 11 so that the square rod 21 can slide in the square tube 11. The other end of the square rod 21 is connected to the vertical rod 22; the magnet is cylindrical, the cross-section of the magnet is less than or equal to the cross-section of the screw rod, and the magnet 7 is fixed at the end of the vertical rod 22 away from the square rod 21.

[0058] In other embodiments, different from the above embodiments, the magnet 7 is directly fixed at the end of the vertical rod 22 away from the square rod 21.

[0059] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A cable head extraction device for a ring main unit, characterized in that: It includes an end bracket, a middle bracket, a screw, a rotating shaft head and a hook and loop fastener; The middle bracket is provided with a screw hole, the screw is threadedly connected to the screw hole, both ends of the screw extend out of the screw holes respectively, the rotating shaft head is rotatably connected to one end of the screw, the rotating shaft head rotates around the axis of the screw, and the Velcro is inserted into the rotating shaft head; Two end brackets are provided, and the two end brackets are located at opposite ends of the middle bracket. The end brackets are slidably connected to the middle bracket, and the end brackets are used to connect the ring network cabinet.

2. The cable head extraction device for the ring main unit according to claim 1 is characterized in that: The middle bracket comprises a first nut, a square tube and a sleeve, the opposite two side surfaces of the square tube are respectively provided with a coaxial first through hole and a second through hole, the sleeve is penetrated through the first through hole and the second through hole, two ends of the sleeve extend out of the first through hole and the second through hole, one end of the sleeve is folded outward to form a folded edge, the folded edge overlaps the outer surface of the square tube, the other end of the sleeve is provided with an external thread, the first nut is threadedly connected to the external thread, and the inner hole of the sleeve is provided with an internal thread to form the screw hole; One of the end brackets can extend into one end of the square tube, and the other end bracket can extend into the other end of the square tube. The two end brackets can slide towards or away from each other relative to the square tube.

3. The cable head extraction device for the ring main unit according to claim 2 is characterized in that: The end bracket comprises a magnet, a threaded rod, a square rod and a vertical rod, the square rod is perpendicular to the vertical rod, one end of the square rod is arranged in the square tube so that the square rod slides in the square tube, and the other end of the square rod is connected to the vertical rod; A first threaded hole is provided on the square rod, and a second threaded hole is provided on the vertical rod. The first threaded hole and the second threaded hole are connected and coaxial. The threaded rod is threadedly connected to the first threaded hole and the second threaded hole. The length of the threaded rod is greater than the sum of the depths of the first threaded hole and the second threaded hole. The magnet is fixed to one end of the screw rod away from the square rod, the magnet is cylindrical, and the cross-sectional area of ​​the magnet is less than or equal to the cross-sectional area of ​​the second threaded hole.

4. The cable head extraction device for a ring main unit according to claim 2 is characterized in that: A slide rail is arranged in the square tube, a slider is arranged on the end bracket, the slider is slidably connected to the slide rail, the sliding direction of the slider is the same as the sliding direction of the end bracket, and the slide rail extends along the sliding direction of the end bracket.

5. The cable head extraction device for the ring main unit according to claim 4 is characterized in that: The slide rail comprises a first plate, a second plate and a third plate, the first plate is connected to the second plate and the third plate at two opposite sides respectively, the second plate is fixedly connected to the inner wall of the square tube at one side away from the first plate, the third plate is fixedly connected to the inner wall of the square tube at one side away from the first plate, and the first plate, the second plate, the third plate and the square tube enclose an inner cavity with a square cross section; The slider is in the shape of a rectangular strip, the length direction of the slider is parallel to the length direction of the square tube, and the slider is placed in the inner cavity so that the slider is slidably connected to the slide rail.

6. The cable head extraction device for a ring main unit according to claim 2 is characterized in that: A gear is arranged on the outer periphery of the sleeve, and the gear is arranged in the square tube; a rack is arranged on the end bracket, and the rack extends along the length direction of the square tube, and the gear is meshed between the racks of the two end brackets.

7. The cable head extraction device for a ring main unit according to claim 3 is characterized in that: A stabilizing ring is arranged on the vertical rod, and the stabilizing ring is arranged around the outer wall of the vertical rod. A stabilizing foot is arranged on the side of the stabilizing ring away from the square tube. The stabilizing foot is cylindrical and is arranged around the outer edge of the stabilizing ring. The stabilizing foot and the vertical rod are spaced apart.

8. The cable head extraction device for a ring main unit according to claim 3 is characterized in that: An annular groove is arranged at the end of the vertical rod away from the square rod, the opening of the annular groove faces away from the square rod, and an anti-skid pad is arranged in the annular groove, and the anti-skid pad is used to increase the friction between the vertical rod and the ring network cabinet.

9. The cable head extraction device for a ring main unit according to claim 2, characterized in that: The middle bracket also includes a second nut, the second nut is threadedly connected to the external thread, and the second nut is arranged on a side of the first nut away from the folded edge.

10. The cable head extraction device for a ring main unit according to claim 2, characterized in that: The end bracket comprises a magnet, a square rod and a vertical rod, the square rod is perpendicular to the vertical rod, one end of the square rod is arranged in the square tube so that the square rod slides in the square tube, and the other end of the square rod is connected to the vertical rod; The magnet is fixed on one end of the vertical rod away from the square rod.

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