CN113036580A - Outer sheath of high-voltage cross-linked polyethylene insulated power cable and insulation layer stripping tool - Google Patents
Outer sheath of high-voltage cross-linked polyethylene insulated power cable and insulation layer stripping tool Download PDFInfo
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- CN113036580A CN113036580A CN202110474945.7A CN202110474945A CN113036580A CN 113036580 A CN113036580 A CN 113036580A CN 202110474945 A CN202110474945 A CN 202110474945A CN 113036580 A CN113036580 A CN 113036580A
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- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
Abstract
The invention provides an outer sheath of a high-voltage cross-linked polyethylene insulated power cable and an insulation layer stripping tool, and belongs to the technical field of power construction. A cutting mechanism comprising a cubic structure; the upper part of the rear side of the cutting mechanism is provided with a rear arc-shaped groove which penetrates through the cutting mechanism, and the inner diameter of the rear arc-shaped groove is matched with the outer diameter of the high-voltage power cable; the upper part of the front side of the cutting mechanism is provided with a front arc-shaped groove, the bottom height of the front arc-shaped groove is lower than that of the rear arc-shaped groove, and the inner diameter of the front arc-shaped groove is matched with the outer diameter of an insulating layer of a high-voltage power cable; the inner side of the front arc-shaped groove is provided with threads, and the bottom of the front arc-shaped groove is provided with a blade for cutting; the top end of the blade is pointed, one side of the blade, which is contacted with the top end of the blade, is a cutting edge, and the cutting edge is collinear with the upper axis and the lower axis of the cutting mechanism. The invention has the functions of circular cutting, transverse cutting and rotary cutting at the same time, and can realize the cutting of the outer sheath of the high-voltage power cable and the cutting of the insulating layer.
Description
Technical Field
The invention belongs to the technical field of power construction, and particularly relates to an outer sheath of a high-voltage cross-linked polyethylene insulated power cable and an insulation layer stripping tool.
Background
When the high-voltage cross-linked polyethylene insulated power cable needs to be butted or a high-voltage cable terminal is manufactured, an outer sheath, an insulating layer and the like of the high-voltage power cable need to be stripped, and a conductor in the center of the cable is exposed. At present, an electrician knife or a paper cutter is often used when an outer sheath of a high-voltage power cable is stripped, circular cutting is firstly carried out at a position 1m-2m away from the head of the cable, and then longitudinal cutting is carried out from a cut to the end of the cable.
In view of the above problems, some tools for stripping the outer sheath of the high voltage power cable have appeared, for example, patent document CN105514882A proposes a cable stripper and a stripping method thereof, including an upper clamp body and a lower clamp body hinged by a pin shaft, wherein the front ends of the hinged points of the upper clamp body and the lower clamp body are both formed with clamp heads, and the rear ends of the hinged points are both formed with clamp handles, which is characterized in that: the inner sides of the two forceps heads or the inner sides of the two forceps handles are respectively fixed with a vertical blade used for circumferential peeling of the cable, and the vertical blade fixed on the forceps head of the upper forceps body and the vertical blade fixed on the forceps head of the lower forceps body are oppositely sheared or the vertical blade fixed on the forceps handle of the upper forceps body and the vertical blade fixed on the forceps handle of the lower forceps body are oppositely sheared. The cable peeling pliers that this patent provided can be applicable to various line footpaths cable, can circumference, axial skin, nevertheless because of cable insulation is thick, can't realize the excision to cable insulation.
For another example, patent document CN202454884U proposes a manual cutting machine for high-voltage cables, which includes a frame, a diameter positioning system, a diameter adjusting device, a cutting device, and a handle, wherein the frame is in an annular cylinder shape, and the diameter positioning system includes a rotating shaft, a connecting rod, a rocker arm, and a positioning bearing; the four rotating shafts are uniformly distributed along the circumferential direction of the rack and are fixedly connected with the rack, the rear end of the rocker arm is hinged with the rack through the rotating shafts, and the front end of the rocker arm is connected with the positioning bearing; the horizontally arranged connecting rods are respectively hinged with the rear ends of the two adjacent rocker arms; the handle is connected with the periphery of the side wall of the frame. The cutting machine provided by the patent can be used for rotatably cutting the outer sheath or the insulating layer of the cable from the end part of the cable in a manual rotating mode, but when the cutting machine is manually rotated, a pressure consistent with the axial direction of the cable is required to be applied at the same time to realize cutting.
Disclosure of Invention
The invention aims to solve the technical problem of providing an outer sheath of a high-voltage cross-linked polyethylene insulated power cable and an insulation layer stripping tool aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a high-voltage cross-linked polyethylene insulated power cable outer sheath and insulation layer stripping tool comprises a cutting mechanism with a cubic structure;
the upper part of the rear side of the cutting mechanism is provided with a rear arc-shaped groove which penetrates through the cutting mechanism, and the inner diameter of the rear arc-shaped groove is matched with the outer diameter of the high-voltage power cable;
the upper part of the front side of the cutting mechanism is provided with a front arc-shaped groove, the bottom height of the front arc-shaped groove is lower than that of the rear arc-shaped groove, and the inner diameter of the front arc-shaped groove is matched with the outer diameter of an insulating layer of a high-voltage power cable;
the inner side of the front arc-shaped groove is provided with threads, and the bottom of the front arc-shaped groove is provided with a blade for cutting; the top end of the blade is pointed, one side of the blade, which is contacted with the top end of the blade, is a cutting edge, and the cutting edge is collinear with the upper axis and the lower axis of the cutting mechanism.
Furthermore, the height of the blade exceeding the bottom of the rear arc-shaped groove is matched with the thickness of an outer sheath of the high-voltage power cable, and the height of the blade exceeding the bottom of the front arc-shaped groove is matched with the thickness of an insulating layer of the high-voltage power cable.
Furthermore, the upper parts of the left side and the right side of the cutting mechanism are provided with a left arc-shaped groove and a right arc-shaped groove which penetrate through the cutting mechanism, and the left arc-shaped groove and the right arc-shaped groove are consistent in specification and are at the same height with the rear arc-shaped groove.
Further, the cutting mechanism is provided with elongated grooves enabling the blades to be arranged left and right and front and back.
Furthermore, a pair of angular positions of the top surface of the cutting mechanism is vertically provided with positioning columns, the other diagonal position is vertically provided with positioning holes, and the positioning columns are matched with the positioning holes in specification.
Furthermore, fastening holes are hollowed in two adjacent angle positions, close to the front arc-shaped groove, of the top surface of the cutting mechanism, and fastening rods are arranged in the fastening holes; the fastening rod is a threaded rod, and one end connected with the cutting mechanism is provided with a multi-angle limiting head; the bottom end of one of the fastening holes is provided with a polygonal groove, and the specification of the polygonal groove is matched with that of the polygonal limiting head.
Furthermore, the cutting mechanisms are connected with each other through pliers in a pair; the hand vice is formed by hinging two forceps arms in a crossed manner; the handle end of the forceps arm is provided with a rubber sheath, and the other end of the forceps arm is rotatably connected with one side of the cutting mechanism close to the rear arc-shaped groove.
Furthermore, one side of the cutting mechanism, which is connected with the clamp arm, is provided with a limit groove, the clamp arm is provided with a limit column, and the free end of the limit column is arranged in the limit groove and used for preventing the cutting mechanism from rotating without limit.
Furthermore, the cutting mechanisms are in a pair and are in threaded connection through two ends of the screw rod; the two ends of the screw rod adopt opposite threads, and a threaded hole matched with the threads of the screw rod is formed in the cutting mechanism.
Furthermore, the tail end of the screw rod is provided with an operation hole.
The prior tool for stripping the outer sheath of the high-voltage power cable has single function, or only has a circular cutting function (along the circumference of the cable) or only has a transverse cutting function (along the axis of the cable), and several tools are required to be combined for use when the outer sheath is stripped. In order to solve the above problems, some hand tools integrating the functions of circular cutting and transverse cutting have appeared in the prior art, and because the moving directions of the tools are different in the circular cutting and transverse cutting, the hand tools are provided with a cutter for circular cutting and a cutter for transverse cutting (such as patent documents CN207765891U, CN102208781A and the like), or only one cutter can be used for circular cutting and transverse cutting (such as patent document CN 208369096U).
However, the hand tool can only be used for cutting the outer sheath of the high-voltage cable, and is not suitable for cutting the insulating layer of the high-voltage cable. On the one hand, the insulating layer is made of cross-linked polyethylene (XLPE), the hardness and rigidity of the cross-linked polyethylene are both greater than those of Polyethylene (PE) or polyvinyl chloride (PVC) which is used as the outer sheath, and the thickness of the insulating layer is thicker, so that circular cutting or transverse cutting is not suitable for the insulating layer. Therefore, the cutting of the insulating layer can be performed only by rotary cutting (spiral cutting) from the end thereof.
Although the circular cutting function of the hand tool is similar to the rotary cutting function required for cutting an insulating layer, the circular cutting tool cannot be used for rotary cutting, because the cutting tool needs to rotate and move along the axis of the cable during rotary cutting, a force along the axis of the cable needs to be applied, and the circular cutting function only needs to cut a circular surface and cannot automatically generate a transverse moving force during rotation.
The invention overcomes the defects through design, has the functions of circular cutting, transverse cutting and rotary cutting, can be suitable for cutting the outer sheath of the high-voltage power cable, and can be suitable for cutting the insulating layer of the high-voltage power cable.
The invention has the following beneficial effects:
the cable outer sheath is provided with the rear arc-shaped groove and the left and right arc-shaped grooves which are matched with the cable outer sheath, and when the cable outer sheath is tightly attached to the bottom of the rear arc-shaped groove, the outer sheath can be subjected to circular cutting; when the cable is tightly attached to the bottoms of the left and right arc-shaped grooves, the outer sheath can be transversely cut. The rotary cutting machine is also provided with a front arc-shaped groove matched with the cable insulating layer, threads are arranged in the front arc-shaped groove, and when the cable insulating layer is tightly attached to the bottom of the front arc-shaped groove, the rotary cutting machine can be rotated to cut the insulating layer.
The cutting direction of the blade can be adjusted, so that circular cutting and transverse cutting of the cable outer sheath can be realized only by the rear arc-shaped groove even if the left and right arc-shaped grooves are not arranged.
According to the invention, the cutting mechanism can be pressed on the high-voltage power cable to finish cutting by arranging various connecting parts such as the fastening rod, the pliers or the screw rod, and the connecting parts can also play the role of the handle, so that more labor is saved during cutting.
When the peeling tool is used, other tools do not need to be replaced or the cutting tool does not need to be disassembled and assembled, and compared with the traditional peeling mode adopting an electrician knife or a paper cutter, the peeling tool can improve the working efficiency, reduce the workload and simultaneously avoid the injury of personnel caused by the use of the traditional tools.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1: a high-voltage power cable structure schematic diagram;
FIG. 2: the structure of embodiment 1 of the invention is schematically shown;
FIG. 3: embodiment 1 of the invention carries on the ring cutting schematic diagram to the outer sheath;
FIG. 4: the embodiment 1 of the invention is a schematic cross-cutting of an outer sheath;
FIG. 5: embodiment 1 of the invention cuts the schematic diagram to the insulating layer;
FIG. 6: the structure of embodiment 2 of the invention is schematically shown;
FIG. 7: the structure of the blade in embodiment 2 of the invention is shown schematically;
FIG. 8: embodiment 2 of the invention a cross-sectional view of a cutting mechanism;
FIG. 9: the structure of embodiment 3 of the invention is schematically illustrated;
FIG. 10: one of the structural schematic diagrams of embodiment 4 of the present invention;
FIG. 11: the second structure diagram of embodiment 4 of the present invention;
FIG. 12: one of the structural schematic diagrams of embodiment 5 of the present invention;
FIG. 13: a second schematic structural diagram of embodiment 5 of the present invention;
wherein: 1-high-voltage power cable, 11-conductor, 12-conductor shielding layer, 13-insulating layer, 14-insulating shielding layer, 15-water-blocking buffer layer, 16-corrugated aluminum sleeve, 17-outer sheath, 2-cutting mechanism, 21-left and right arc-shaped grooves, 22-rear arc-shaped groove, 23-front arc-shaped groove, 231-screw thread, 232-mounting hole, 233-left and right long groove, 234-front and rear long groove, 235-circular groove, 24-blade, 241-rotary table, 242-knurled nut, 25-positioning column, 26-positioning hole, 27-fastening hole 271, polygonal groove, 28-limiting groove, 29-connecting block, 3-fastening rod, 31-butterfly nut, 32-polygonal limiting head, 4-hand vice, 41-clamp arm, 42-rubber sheath, 43-rotating shaft, 44-shaft pin, 45-limiting column, 5-screw rod and 51-operation hole.
Detailed Description
For a better understanding of the invention, the following description is given in conjunction with the examples and the accompanying drawings, but the invention is not limited to the examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
It is noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", "bottom", "top", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular manner, and thus, should not be construed as limiting the present invention.
The specification refers to the model YJLW 022201 x 400 (rated voltage 220kV, single core, copper conductor nominal sectional area 400 mm)2Reference is made to the crosslinked polyethylene insulated power cable of GB/T18890.2-2015) for example. As shown in fig. 1, the YJLW 022201 × 400 type high voltage power cable 1 is composed of a conductor 11, a conductor shielding layer 12, an insulating layer 13, an insulating shielding layer 14, a water blocking buffer layer 15, a corrugated aluminum sheath 16 and an outer sheath 17 from inside to outside. Wherein the cross-sectional area of the conductor 11 is 400mm2The outer diameter of the conductor 11 is about 23.8mm, the thickness of the conductor shielding layer 12 is 2mm, the thickness of the insulating layer 13 is 27mm, the outer diameter of the insulating layer 13 is about 81.8mm, the thickness of the outer sheath 17 is 5mm, and the outer diameter (cable outer diameter) of the outer sheath 17 is about 128.7 mm.
Other specifications of high voltage cross-linked polyethylene insulated power cable configurations may differ from fig. 1, but each include a conductor 11, an insulation layer 13, and an outer jacket 17. It should be noted that the specification of the YJLW 022201 × 400 type high voltage power cable is not intended to represent that the present invention is only applicable to this type of high voltage power cable, and in practical implementation, the relevant dimensions of the present invention can be adjusted appropriately to be applicable to high voltage power cables of other specifications.
Example 1:
referring to fig. 2 to 5, the outer sheath and insulation stripping tool for high voltage cross-linked polyethylene insulated power cables according to the present embodiment includes a cutting mechanism 2, the cutting mechanism 2 is a cubic structure, left and right arc grooves 21 penetrating the cutting mechanism 2 in the left and right directions are formed on the upper portions of the left and right sides, and a rear arc groove 22 penetrating the cutting mechanism 2 in the front and rear directions is formed on the upper portion of the rear side; the specifications of the left arc-shaped groove 21, the right arc-shaped groove 21 and the rear arc-shaped groove 22 are consistent, the central axes are all positioned above the cutting mechanism 2 and at the same height, and the central axes are mutually vertical and are all parallel to the bottom surface of the cutting mechanism 2; the inner diameters of the left and right arc-shaped grooves 21 and the rear arc-shaped groove 22 are both matched with the outer diameter (cable outer diameter) of the outer sheath 17.
The upper part of the front side of the cutting mechanism 2 is provided with a front arc-shaped groove 23, the central axis of the front arc-shaped groove 23 is parallel to the central axis of the rear arc-shaped groove 22, and the central axis is parallel to the bottom surface of the cutting mechanism 2; the bottom height of the front arc-shaped groove 23 is lower than that of the rear arc-shaped groove 22; the inner diameter of the front arc-shaped groove 23 is matched with the outer diameter of the insulating layer 13, and the front-back length is more than half of the front-back width of the cutting mechanism 2; the inner side of the front arc-shaped groove 23 is also provided with a thread 231.
The bottom of preceding arc recess 23 is provided with blade 24 that is used for the cutting, and blade 24 is parallel with the front and back both sides of cutting mechanism 2, wholly is right trapezoid, and the left and right sides all is perpendicular with the bottom surface of cutting mechanism 2, and the top is the point shape, is the cutting edge with one side of most advanced (knife tip) contact, the cutting edge is with the upper and lower axis collineation of cutting mechanism 2. In order to be suitable for cutting the outer sheath 17, the height of the blade 24 exceeding the bottoms of the left and right arc-shaped grooves 21 and the rear arc-shaped groove 22 is matched with the thickness of the outer sheath 17; to be suitable for cutting the insulating layer 13, the height of the cutting insert 24 above the bottom of the front arc-shaped groove 23 is matched to the thickness of the insulating layer 13.
When the outer sheath 17 needs to be subjected to circular cutting (cutting along the circumference of the outer sheath 17), as shown in fig. 6, the bottom of the rear arc-shaped groove 22 can be tightly attached to the high-voltage power cable 1, and the circular cutting can be completed by rotating the cutter blade 24 in the direction of the cutting edge. When the outer sheath 17 needs to be transversely cut (cut along the axis of the outer sheath 17), as shown in fig. 7, the bottoms of the left and right arc-shaped grooves 21 can be tightly attached to the high-voltage power cable 1, and the transverse cutting can be completed by moving the cutter blade 24 in the blade edge direction. When the outer jacket 17 is ring cut and cross cut from the ring cut to the cable end, the outer jacket 17 is conveniently stripped.
When the insulating layer 13 needs to be cut, as shown in fig. 8, the two cutting mechanisms 2 can be oppositely arranged, the front arc-shaped groove 23 is sleeved on the insulating layer 13, and after the two cutting mechanisms 2 are pressed tightly, the blade 24 rotates along the blade edge of the blade 24; at this time, the blade 24 cuts the insulating layer 13 spirally while rotating by the screw 231. In order to accurately and firmly position and fix the two oppositely arranged cutting mechanisms 2, a positioning column 25 is vertically arranged at one diagonal of the top surface of the cutting mechanism 2, and a positioning hole 26 is vertically arranged at the other diagonal; the central axes of the positioning columns 25 and the positioning holes 26 are parallel and matched in specification, and the distance between the two positioning columns 25 is equal to the distance between the two positioning holes 26.
Taking YJLW 022201 × 400 type high voltage power cable as an example, the inner diameters of the left and right arc-shaped grooves 21 and the rear arc-shaped groove 22 in this embodiment are both 140mm, which is slightly larger than the outer diameter (128.7 mm) of the outer sheath 17; the inner diameter of the front arc-shaped groove 23 is 85mm and is slightly larger than the outer diameter (81.8 mm) of the insulating layer 13; the height of the blade 24 exceeding the bottoms of the left and right arc-shaped grooves 21 and the rear arc-shaped groove 22 is 5mm, and is consistent with the thickness (5 mm) of the outer sheath 17; the height of the blade 24 above the bottom of the front arc-shaped groove 23 is 27mm, corresponding to the thickness (27 mm) of the insulating layer 13.
Example 2:
referring to fig. 6 to 8, the sheath and insulation stripping tool for high voltage cross-linked polyethylene insulated power cable provided in this embodiment is improved as follows compared to embodiment 1: the left and right arc-shaped grooves 21 are not provided, and the cutting direction of the blade 24 can be adjusted.
As shown in fig. 7, the root of the cutting edge of the blade 24 is provided with a cylindrical turntable 241, the central axis of the turntable 241 is collinear with the cutting edge of the blade 24, the bottom of the turntable 241 is provided with a coaxial threaded rod, the threaded rod is provided with a knurled nut 242 matched with the threaded rod, and the knurled nut 242 is used for fixing the blade 24 on the cutting mechanism 2.
Correspondingly, as shown in fig. 8, the upper and lower axes of the cutting mechanism 2 are hollowed to form mounting holes 232 in clearance fit with the threaded rod at the bottom of the turntable 241, the upper and lower axes of the cutting mechanism 2 are also provided with circular grooves 235 in clearance fit with the turntable 241, the periphery of the circular groove 235 is provided with left and right long grooves 233 and front and rear long grooves 234 in clearance fit with the blade 24, and the left and right long grooves 233 and the front and rear long grooves 234 are long grooves, are perpendicular to the bottom surface of the cutting mechanism 2, and are perpendicular to each other; the front and rear long grooves 234 are parallel to the central axis of the front arc groove 23.
The blade 24 of this embodiment can be disposed in the left and right long grooves 233, at this time, the blade 24 is perpendicular to the central axis of the rear arc-shaped groove 22, and after the bottom of the rear arc-shaped groove 22 is closely attached to the high-voltage power cable 1, the ring cutting can be completed by rotating the present invention in the direction of the blade edge of the blade 24. At this time, the two cutting mechanisms 2 are oppositely arranged, the front arc-shaped groove 23 is sleeved on the insulating layer 13, and the insulating layer 13 can be cut by turning to the invention.
The blade 24 of the present embodiment may be disposed in the front and rear elongated grooves 234, and at this time, the blade 24 is parallel to the central axis of the rear arc-shaped groove 22, and at this time, the bottom of the rear arc-shaped groove 22 is closely attached to the high-voltage power cable 1, and the transverse cutting is completed by moving the present invention in the blade edge direction of the blade 24.
Example 3:
referring to fig. 9, the outer sheath of the high voltage cross-linked polyethylene insulated power cable and the insulation stripping tool provided in this embodiment are improved as follows compared with embodiment 2: the positioning column 25 and the positioning hole 26 are not arranged, and fastening holes 27 are hollowed at two corners of the top surface of the cutting mechanism 2 close to the front arc-shaped groove 23; the fastening hole 27 is cylindrical and extends vertically through the cutting mechanism 2, and the central axis thereof is parallel to the side surface of the cutting mechanism 2.
When the insulating layer 13 needs to be cut, the two cutting mechanisms 2 can be oppositely arranged, the fastening rod 3 penetrates through the two opposite fastening holes 27, and the fastening rod 3 is a threaded rod, so that the two front arc-shaped grooves 23 can be tightly pressed on the insulating layer 13 by nuts, and the cutting mechanisms 2 are prevented from slipping when rotating.
In the embodiment, the end of the fastening rod 3 connected to the cutting mechanism 2 is provided with a polygonal limiting head 32, and in order to prevent the fastening rod 3 from rotating in the fastening holes 27, the bottom end of one of the fastening holes 27 is provided with a polygonal groove 271, and the specification of the polygonal groove is matched with that of the polygonal limiting head 32. In order to make the present invention more convenient to use, the butterfly nut 31 is matched with the fastening rod 3 for fastening, and the butterfly nut 31 can be screwed up manually.
This embodiment can use anchorage bar 3 to compress tightly preceding arc recess 23 and accomplish the cutting on insulation layer 13 when cutting insulation layer 13 to anchorage bar 3 also can play the effect of handle, and usable anchorage bar 3 rotates cutting mechanism 2, and is more laborsaving during the cutting.
Example 4:
referring to fig. 10 to 11, the sheath and insulation stripping tool for high voltage cross-linked polyethylene insulated power cable provided in this embodiment is improved as follows compared to embodiment 2: the positioning column 25 and the positioning hole 26 are not provided, two cutting mechanisms 2 are provided, and the two cutting mechanisms 2 are arranged oppositely and connected through the pliers 4.
The pliers 4 is formed by two pliers arms 41 which are mutually crossed and hinged through a rotating shaft 43, a rubber sheath 42 is arranged at the handle end of each pliers arm 41, and anti-skid lines are arranged on the rubber sheath 42; the other end of the jawarm 41 is pivotally connected to the cutting mechanism 2 adjacent the rear arcuate recess 22 by a pivot pin 44, the pivot pin 44 having a central axis parallel to the central axis of the pivot shaft 43.
In order to prevent the cutting mechanism 2 from rotating on the jawarms 41 without limitation, a limiting groove 28 is arranged on the side wall of the cutting mechanism 2 contacting with the jawarms 41, the limiting groove 28 is an arc-shaped groove concentric with the shaft pin 44, correspondingly, a limiting column 45 is arranged at the corresponding position of the jawarms 41, and the limiting column 45 can extend into the limiting groove 28; the limiting groove 28 and the limiting column 45 can enable the cutting mechanism 2 to rotate within a limited range.
In the embodiment, when the outer sheath 17 is subjected to circular cutting, the blade 24 can be arranged in the left and right long grooves 233, and the rear arc-shaped groove 22 is pressed on the high-voltage power cable 1 by using the pliers 4 to complete cutting; when the outer sheath 17 is transversely cut, the blade 24 can be arranged in the front and rear long grooves 234, and the rear arc-shaped groove 22 is pressed on the high-voltage power cable 1 by using the pliers 4 to complete cutting; when cutting the insulating layer 13, the cutting can be completed by pressing the front arc-shaped groove 23 against the insulating layer 13 using the pliers 4.
This embodiment adopts pliers 4 operation cutting mechanism 2 to cut or cut, and is more convenient laborsaving during the operation.
Example 5:
referring to fig. 12 to 13, the sheath and insulation stripping tool for high voltage cross-linked polyethylene insulated power cable provided in this embodiment is improved as follows compared to embodiment 2: the positioning column 25 and the positioning hole 26 are not arranged, two cutting mechanisms 2 are arranged, and the two cutting mechanisms 2 are arranged oppositely and are connected through a screw 5 in a threaded manner.
As shown in fig. 12, two opposite corners of the two cutting mechanisms 2 adjacent to the front arc-shaped groove 23 (one of the corners is located on the lower cutting mechanism 2, and the other corner is located on the upper cutting mechanism 2) are provided with outwardly extending connecting blocks 29; the connecting block 29 is used for installing the screw rod 5, a threaded hole matched with the screw rod 5 is arranged in a hollow mode, and the central axis of the threaded hole is parallel to the side face of the cutting mechanism 2. The lead screw 5 is installed through the connecting block 29 in the embodiment, so that the lead screw 5 can be far away from the center of the cutting mechanism 2, and the lead screw 5 is prevented from touching and scratching the outer sheath of the high-voltage power cable during working.
The screw rod 5 is a trapezoidal screw rod (the cross section of the thread is trapezoidal), and in order to enable the two cutting mechanisms 2 to synchronously move inwards or outwards when the screw rod 5 rotates, threads in opposite directions are adopted at two ends of the screw rod 5 (as shown in fig. 13). The end of the screw rod 5 is provided with an operation hole 51, and when in use, a screwdriver can be inserted into the operation hole 51 to operate the screw rod 5 to rotate. The screw 5 can also function as a handle when cutting or chipping.
In the embodiment, when the outer sheath 17 is subjected to circular cutting, the blade 24 can be arranged in the left and right long grooves 233, and the rear arc-shaped groove 22 is pressed on the high-voltage power cable 1 by using the screw rod 5 to complete cutting; when the outer sheath 17 is transversely cut, the blade 24 can be arranged in the front and rear long grooves 234, and the rear arc-shaped groove 22 is pressed on the high-voltage power cable 1 by using the screw rod 5 to complete cutting; when the insulating layer 13 is cut, the front arc-shaped groove 23 can be pressed against the insulating layer 13 by using the lead screw 5 to complete the cutting.
In the embodiment, the distance between the two cutting mechanisms 2 is adjusted by adopting the screw rod 5, so that the cutting mechanisms 2 can be firmly pressed on the high-voltage power cable 1 or the insulating layer 13, and the slipping is prevented during cutting or cutting.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a high pressure crosslinked polyethylene insulating power cable oversheath and insulating layer strip instrument which characterized in that: a cutting mechanism comprising a cubic structure;
the upper part of the rear side of the cutting mechanism is provided with a rear arc-shaped groove which penetrates through the cutting mechanism, and the inner diameter of the rear arc-shaped groove is matched with the outer diameter of the high-voltage power cable;
the upper part of the front side of the cutting mechanism is provided with a front arc-shaped groove, the bottom height of the front arc-shaped groove is lower than that of the rear arc-shaped groove, and the inner diameter of the front arc-shaped groove is matched with the outer diameter of an insulating layer of a high-voltage power cable;
the inner side of the front arc-shaped groove is provided with threads, and the bottom of the front arc-shaped groove is provided with a blade for cutting; the top end of the blade is pointed, one side of the blade, which is contacted with the top end of the blade, is a cutting edge, and the cutting edge is collinear with the upper axis and the lower axis of the cutting mechanism.
2. The tool for stripping the outer sheath and the insulation layer of the high voltage cross-linked polyethylene insulated power cable according to claim 1, wherein: the height of the blade exceeding the bottom of the rear arc-shaped groove is matched with the thickness of an outer sheath of a high-voltage power cable, and the height of the blade exceeding the bottom of the front arc-shaped groove is matched with the thickness of an insulating layer of the high-voltage power cable.
3. The tool for stripping the outer sheath and the insulation layer of the high voltage cross-linked polyethylene insulated power cable according to claim 2, wherein: the upper portions of the left side and the right side of the cutting mechanism are provided with a left arc-shaped groove and a right arc-shaped groove which penetrate through the cutting mechanism, and the left arc-shaped groove and the right arc-shaped groove are consistent in specification and are at the same height with the rear arc-shaped groove.
4. The tool for stripping the outer sheath and the insulation layer of the high voltage cross-linked polyethylene insulated power cable according to claim 2, wherein: the cutting mechanism is provided with elongated grooves enabling the blades to be arranged left and right and front and back.
5. The tool for stripping the outer sheath and the insulating layer of the high-voltage cross-linked polyethylene insulated power cable according to claim 3 or 4, wherein: and positioning columns are vertically arranged at a pair of angular positions of the top surface of the cutting mechanism, positioning holes are vertically arranged at the other diagonal position, and the specifications of the positioning columns are matched with those of the positioning holes.
6. The tool for stripping the outer sheath and the insulating layer of the high-voltage cross-linked polyethylene insulated power cable according to claim 3 or 4, wherein: fastening holes are hollowed in two adjacent angle positions, close to the front arc-shaped groove, of the top surface of the cutting mechanism, and fastening rods are arranged in the fastening holes; the fastening rod is a threaded rod, and one end connected with the cutting mechanism is provided with a multi-angle limiting head; the bottom end of one of the fastening holes is provided with a polygonal groove, and the specification of the polygonal groove is matched with that of the polygonal limiting head.
7. The tool for stripping the outer sheath and the insulating layer of the high-voltage cross-linked polyethylene insulated power cable according to claim 3 or 4, wherein: the cutting mechanisms are in a pair and are connected with each other through pliers; the hand vice is formed by hinging two forceps arms in a crossed manner; the handle end of the forceps arm is provided with a rubber sheath, and the other end of the forceps arm is rotatably connected with one side of the cutting mechanism close to the rear arc-shaped groove.
8. The tool of claim 7, wherein the tool comprises: and a limiting groove is formed in one side of the cutting mechanism, which is connected with the clamp arm, a limiting column is arranged on the clamp arm, and the free end of the limiting column is arranged in the limiting groove and used for preventing the cutting mechanism from rotating without limit.
9. The tool for stripping the outer sheath and the insulating layer of the high-voltage cross-linked polyethylene insulated power cable according to claim 3 or 4, wherein: the cutting mechanisms are in a pair and are in threaded connection through two ends of the screw rod; the two ends of the screw rod adopt opposite threads, and a threaded hole matched with the threads of the screw rod is formed in the cutting mechanism.
10. The tool for stripping the outer sheath and the insulation layer of the high voltage cross-linked polyethylene insulated power cable according to claim 9, wherein: and the tail end of the screw rod is provided with an operation hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474945.7A CN113036580B (en) | 2021-04-29 | 2021-04-29 | Outer sheath of high-voltage cross-linked polyethylene insulated power cable and insulation layer stripping tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474945.7A CN113036580B (en) | 2021-04-29 | 2021-04-29 | Outer sheath of high-voltage cross-linked polyethylene insulated power cable and insulation layer stripping tool |
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| CN113036580A true CN113036580A (en) | 2021-06-25 |
| CN113036580B CN113036580B (en) | 2022-09-20 |
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| CN202110474945.7A Active CN113036580B (en) | 2021-04-29 | 2021-04-29 | Outer sheath of high-voltage cross-linked polyethylene insulated power cable and insulation layer stripping tool |
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| EP0652617A1 (en) * | 1993-09-29 | 1995-05-10 | Sumitomo Wiring Systems, Ltd. | Electric cable for connector and its production method and apparatus |
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| KR101652663B1 (en) * | 2016-01-27 | 2016-09-01 | 대원전기 주식회사 | Underground cable sheath cutter cutting method using the cutting device for underground cables |
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| CN211296004U (en) * | 2019-12-25 | 2020-08-18 | 南昌八一电缆有限公司 | Cable sheath stripping off device |
| CN112490957A (en) * | 2020-12-31 | 2021-03-12 | 山东棋盘信息科技有限公司 | Stripping equipment for cable insulating layer and metal sheath |
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| EP0652617A1 (en) * | 1993-09-29 | 1995-05-10 | Sumitomo Wiring Systems, Ltd. | Electric cable for connector and its production method and apparatus |
| US20080098598A1 (en) * | 2006-10-30 | 2008-05-01 | Mcfall Robert A | Electric wire insulation center stripping method and device |
| CN203607760U (en) * | 2013-10-21 | 2014-05-21 | 浙江汉斯电气有限公司 | Cable stripping tool capable of adjusting angle of blade |
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|---|---|
| CN113036580B (en) | 2022-09-20 |
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