Safety stripping and cutting tool for main insulation wrapping semi-conductive layer of high-voltage cable

Abstract

The utility model discloses a high-voltage cable main insulation wrapping semi-conductive layer safe stripping and cutting tool comprising a handle, the upper end of the handle is provided with a crossbeam, the crossbeam is slidably connected with a pair of movable plates, the pair of movable plates is rotatably provided with two first rollers, and the two first rollers are rotatably arranged on the upper end of the handle. A second rolling wheel is arranged between the two first rolling wheels located on the same movable plate, the axis of the second rolling wheel is perpendicular to the axis of the first rolling wheel, a position adjusting assembly is arranged between the second rolling wheel and the movable plate, a double-thread screw is rotationally installed on the cross beam and is in threaded connection with the pair of movable plates, and the pair of movable plates is in threaded connection with the double-thread screw. According to the cable semi-conductive layer cutting device, due to the fact that the second rolling wheel, the reversing assembly and other related mechanisms are arranged, transverse cutting and longitudinal cutting can be carried out on a cable semi-conductive layer at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of cable semi-conductive layer stripping tools, in particular to a safe stripping tool for the semi-conductive layer wrapped around the main insulation of high-voltage cables. Background Technique

[0002] The semi-conductive layer of high-voltage cables is a smooth conductive material, which plays a role in evenly distributing the electric field and protecting the insulation in high-voltage cables. Especially in high-voltage cables with high voltage levels, the semi-conductive layer is essential because it can ensure uniform electric field distribution and prevent excessive corona discharge of voltage. When installing high-voltage cables, it is usually necessary to strip the semi-conductive layer wrapped around the main insulation of high-voltage cables, and special stripping tools are usually required for stripping.

[0003] For example, the Chinese utility model patent with the publication number CN214506364U discloses a cable outer semi-conductive layer stripping tool. The cable outer semi-conductive layer stripping tool includes: a support base and a movable claw. A groove one is opened on one side of the support base, and the movable claw extends into the interior of the groove one. Connecting rods one are provided on both the upper and lower sides of the support base, and both ends of the connecting rods one are connected to the support base through bearings. Rollers one are fixedly provided on the outer sides of the two connecting rods one. Grooves two are provided on both sides of the movable claw, and a cutting mechanism is provided on one side of the movable claw. The cutting mechanism includes a knob. When stripping the outer semi-conductive layer, it does not damage the main insulation, does not appear serrated, the cut end is flat, there are no gaps, and the transition is smooth, ensuring convenient, fast, time-saving, labor-saving and efficient operation without damaging the main insulation when manufacturing cable heads, and ensuring the quality of cable head manufacturing.

[0004] However, the disadvantage of this type of tool is that it can only perform horizontal cutting on the semi-conductive layer of high-voltage cables, but cannot perform vertical cutting. In actual use, after horizontal cutting is completed, an electrician's knife is also required to manually perform vertical cutting on the semi-conductive layer of high-voltage cables. The operation difficulty is relatively large, and it is easy to damage the insulation layer of high-voltage cables, posing a safety hazard. Therefore, a safe cutting tool that can simultaneously perform horizontal and vertical cutting on the cable semi-conductive layer is needed. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a safe stripping tool for the semi-conductive layer wrapped around the main insulation of high-voltage cables, which solves the problems mentioned in the background technique.

[0006] To achieve the above object, the utility model is realized by the following technical solutions: A safety stripping tool for the main insulation wrapped semi-conductive layer of a high-voltage cable, including a handle, a cross beam is provided at the upper end of the handle, a pair of movable plates are slidably connected to the cross beam, two first rollers are rotatably installed on each of the pair of movable plates, a second roller is provided between the two first rollers on the same movable plate, the axis of the second roller is perpendicular to the axis of the first roller, a position adjustment component is provided between the second roller and the movable plate, a double-headed screw is rotatably installed on the cross beam, the double-headed screw is threadedly connected to the pair of movable plates, a cutting knife is provided at the upper part of the cross beam, and a telescopic component and a commutation component are provided between the cutting knife and the cross beam.

[0007] Preferably, the thread leads at both ends of the double-headed screw are equal and the helix directions are opposite, and one end of the double-headed screw is connected with a first handle.

[0008] Preferably, the position adjustment component includes a roller frame, the roller frame is slidably installed on the movable plate, the second roller is rotatably installed on the roller frame, a second threaded rod is threadedly connected to the end of the roller frame far from the second roller, one end of the second threaded rod is rotatably connected to the outside of the movable plate, and the other end is connected with a second handle.

[0009] Preferably, the commutation component includes an installation sleeve, a commutation shaft is rotatably installed on the inner wall of the installation sleeve, the cutting knife is arranged on the commutation shaft, a positioning pin is slidably connected to the side wall of the installation sleeve, four pin holes are arranged at equal distances on the outer wall of the commutation shaft, the positioning pin penetrates through the side wall of the installation sleeve and one end extends into the pin hole, a spring is connected between the positioning pin and the outer wall of the installation sleeve, and a commutation handle is connected to the outer wall of the commutation shaft.

[0010] Preferably, the telescopic component includes a first threaded rod, a slider is connected to the lower end of the first threaded rod, the commutation shaft is provided with a cavity, the slider is slidably connected to the cavity of the commutation shaft, an adjusting nut is rotatably installed on the upper part of the commutation shaft, the adjusting nut is threadedly connected to the first threaded rod, and the cutting knife is fixedly installed at the upper end of the first threaded rod.

[0011] Beneficial effects

[0012] The utility model provides a safety stripping tool for the main insulation wrapped semi-conductive layer of a high-voltage cable, which has the following beneficial effects:

[0013] When the first roller of the device contacts the outer wall of the cable, when the device is rotated along the cross-section of the cable, the semi-conductive layer of the cable can be transversely cut. When the second roller contacts the outer wall of the cable through the position adjustment component, at the same time, the commutation component is used to change the orientation of the cutting edge of the cutting knife, and when the device is pulled along the axial direction of the cable, the semi-conductive layer of the cable can be longitudinally cut. Therefore, the device can simultaneously meet the requirements of transversely cutting and longitudinally cutting the semi-conductive layer of the cable. Brief description of the drawings

[0014] Figure 1 This is the front view of the present utility model.

[0015] Figure 2 This is the enlarged view of part A of the present utility model.

[0016] In the figure: 1. Handle; 2. First handle; 3. Double-headed screw; 4. Cross beam; 5. Movable plate; 6. Second handle; 7. Second threaded rod; 8. Roller frame; 9. First roller; 10. Second roller; 11. Mounting sleeve; 12. Reversing shaft; 13. Reversing handle; 14. Adjusting nut; 15. Cutting knife; 16. First threaded rod; 17. Slide block; 18. Positioning pin; 19. Spring; 20. Pin hole. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1-2 , the present utility model provides a technical solution: a safety stripping tool for the main insulation semi-conductive layer of high-voltage cables, including a handle 1, a cross beam 4 is provided at the upper end of the handle 1, a pair of movable plates 5 are slidably connected to the cross beam 4, two first rollers 9 are rotatably installed on each of the pair of movable plates 5, a second roller 10 is provided between the two first rollers 9 on the same movable plate 5, the axis of the second roller 10 is perpendicular to the axis of the first roller 9, a position adjusting assembly is provided between the second roller 10 and the movable plate 7, a double-headed screw 3 is rotatably installed on the cross beam 4, the double-headed screw 3 is threadedly connected to the pair of movable plates 5, a cutting knife 15 is provided above the cross beam 4, and a telescopic assembly and a reversing assembly are provided between the cutting knife 15 and the cross beam 4;

[0019] By rotating the double-headed screw 3, the distance between the pair of movable plates can be adjusted, so that the first rollers 9 are in contact with the outer wall of the high-voltage cable to play a role in fixing and guiding. By the telescopic assembly, the length of the cutting knife 15 extending out can be adjusted, so that the depth of the cutting knife 15 inserted into the high-voltage cable is equal to the thickness of the semi-conductive layer of the cable. At this time, by rotating the handle 1 along the circumferential direction of the cable cross-section, the semi-conductive layer of the cable can be transversely cut. After the transverse cutting is completed, the pair of movable plates 5 and the position adjusting assembly are readjusted to make the first rollers 9 disengage from the outer wall of the cable, and the second roller 10 is in contact with the outer wall of the cable. The cutting knife 15 is rotated 90 degrees by the reversing assembly, and by pulling the handle 1 along the axial direction of the cable, the semi-conductive layer of the cable can be longitudinally cut.

[0020] Further, the thread leads at both ends of the double-headed screw 3 are equal and the helix directions are opposite. One end of the double-headed screw 3 is connected with a first handle 2;

[0021] Through the above technical solution, centering movement of a pair of movable plates 5 can be realized, and at the same time, the double-headed screw 3 can be conveniently rotated by using the first handle 2.

[0022] Further, the position adjusting assembly includes a roller frame 8. The roller frame 8 is slidably installed on the movable plate 5. A second roller 10 is rotatably installed on the roller frame 8. One end of the roller frame 8 away from the second roller 10 is threadedly connected with a second threaded rod 7. One end of the second threaded rod 7 is rotatably connected to the outside of the movable plate 5, and the other end is connected with a second handle 6;

[0023] By rotating the second threaded rod 7 with the second handle 6, horizontal movement of the roller frame 7 on the movable plate 5 can be realized, and further, horizontal position adjustment of the second roller 10 can be realized.

[0024] Further, the commutation assembly includes a mounting sleeve 11. A commutation shaft 12 is rotatably installed on the inner wall of the mounting sleeve 11. A cutting knife 15 is arranged on the commutation shaft 12. A positioning pin 18 is slidably connected to the side wall of the mounting sleeve 11. Four pin holes 20 are equidistantly arranged on the outer wall of the commutation shaft 12. The positioning pin 18 penetrates through the side wall of the mounting sleeve 11 and one end extends into the pin hole 20. A spring 19 is connected between the positioning pin 18 and the outer wall of the mounting sleeve 11. A commutation handle 13 is connected to the outer wall of the commutation shaft 12;

[0025] After pulling the positioning pin 18 to make one end thereof disengage from the pin hole 20, the commutation shaft can be rotated through the commutation handle 13 to change the cutting edge direction of the cutting knife 15. After rotating the commutation shaft 12 by 90 degrees, the positioning pin 18 is released. One end of the positioning pin 18 extends into the pin hole 20 under the pulling force of the spring 19, playing a role in limiting the commutation shaft.

[0026] Further, the telescopic assembly includes a first threaded rod 16. A slider 17 is connected to the lower end of the first threaded rod 16. The commutation shaft 12 is provided with a cavity. The slider is slidably connected to the cavity of the commutation shaft 12. An adjusting nut 14 is rotatably installed on the upper part of the commutation shaft 12. The adjusting nut 14 is threadedly connected with the first threaded rod 16). The cutting knife 15 is fixedly installed at the upper end of the first threaded rod 16;

[0027] Rotating the adjusting nut 14 can make the first threaded rod 16 and the slider 17 move up and down in the cavity of the commutation shaft 12, and further, the adjustment of the extending length of the cutting knife 15 can be realized.

[0028] Embodiment: Rotate the double-headed screw 3 through the first handle 2 to adjust the distance between a pair of movable plates 5, so that the first roller 9 contacts the outer wall of the high-voltage cable to play a role in fixing and guiding. Rotate the adjusting nut 14 to make the first threaded rod 16 and the slider 17 move up and down in the cavity of the reversing shaft 12, so as to adjust the protruding length of the cutting knife 15 so that the depth inserted into the high-voltage cable is equal to the thickness of the semiconductive layer of the cable. Readjust the distance between the pair of movable plates 5, and at the same time rotate the second threaded rod 7 through the second handle 6 to make a pair of roller brackets 7 move horizontally towards the inner side of the movable plate 5, so as to realize the contact of the second roller 10 with the outer wall of the cable. After pulling the positioning pin 18 to disengage one end from the pin hole 20, rotate the reversing handle 13 to rotate the reversing shaft 12 by 90 degrees, and then loosen the positioning pin 18 to make it re-insert into the pin hole 20 under the pulling force of the spring 19, so as to rotate the cutting edge direction of the cutting knife 15 by 90 degrees. Pull the handle 1 along the cable axis direction to longitudinally cut the semiconductive layer of the cable.

[0029] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety stripping tool for a semiconductive layer wrapped around the main insulation of a high-voltage cable, comprising a handle (1), characterized in that: The upper end of the handle (1) is provided with a cross beam (4). A pair of movable plates (5) are slidably connected to the cross beam (4). Two first rollers (9) are rotatably installed on each of the pair of movable plates (5). A second roller (10) is provided between the two first rollers (9) on the same movable plate (5). The axis of the second roller (10) is perpendicular to the axis of the first roller (9). A position adjusting component is provided between the second roller (10) and the movable plate (5). A double-headed screw (3) is rotatably installed on the cross beam (4). The double-headed screw (3) is threadedly connected to the pair of movable plates (5). A cutting knife (15) is provided on the upper part of the cross beam (4). A telescopic component and a commutation component are provided between the cutting knife (15) and the cross beam (4).

2. The safety stripping tool for the semiconductive layer wrapped around the main insulation of a high-voltage cable according to claim 1, characterized in that: The thread leads at both ends of the double-headed screw (3) are equal and the helix directions are opposite. One end of the double-headed screw (3) is connected to a first handle (2).

3. The safety stripping tool for the main insulation semiconductive layer of a high-voltage cable according to claim 2, characterized in that: The position adjusting component includes a roller frame (8). The roller frame (8) is slidably installed on the movable plate (5). The second roller (10) is rotatably installed on the roller frame (8). A second threaded rod (7) is threadedly connected to one end of the roller frame (8) away from the second roller (10). One end of the second threaded rod (7) is rotatably connected to the outside of the movable plate (5), and the other end is connected to a second handle (6).

4. A safety stripping tool for a semiconductive layer wrapped around the main insulation of a high-voltage cable according to any one of claims 1 to 3, characterized in that: The commutation component includes an installation sleeve (11). A commutation shaft (12) is rotatably installed on the inner wall of the installation sleeve (11). The cutting knife (15) is arranged on the commutation shaft (12). A positioning pin (18) is slidably connected to the side wall of the installation sleeve (11). Four pin holes (20) are arranged at equal intervals on the outer wall of the commutation shaft (12). The positioning pin (18) penetrates through the side wall of the installation sleeve (11) and one end extends into the pin hole (20). A spring (19) is connected between the positioning pin (18) and the outer wall of the installation sleeve (11). A commutation handle (13) is connected to the outer wall of the commutation shaft (12).

5. The safety stripping tool for the semiconductive layer wound around the main insulation of a high-voltage cable according to claim 4, characterized in that: The telescopic component includes a first threaded rod (16). The lower end of the first threaded rod (16) is connected to a slider (17). The commutation shaft (12) is provided with a cavity. The slider is slidably connected to the cavity of the commutation shaft (12). An adjusting nut (14) is rotatably installed on the upper part of the commutation shaft (12). The adjusting nut (14) is threadedly connected to the first threaded rod (16). The cutting knife (15) is fixedly installed on the upper end of the first threaded rod (16).

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