CN115548834A

CN115548834A - A tapered instrument for making medium voltage cable head

Info

Publication number: CN115548834A
Application number: CN202211329501.5A
Authority: CN
Inventors: 杨振; 翁文; 叶知文; 张平; 陈瑜; 董高义; 刘子煌
Original assignee: Huaneng Fuzhou Changle Photovoltaic Power Generation Co ltd
Current assignee: Huaneng Fuzhou Changle Photovoltaic Power Generation Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2022-12-30

Abstract

The invention relates to a conical tool for manufacturing a medium-voltage cable head, which comprises a circular truncated cone main body, wherein the circular truncated cone main body is provided with a plurality of annular array phase guide grooves by the axis of the circular truncated cone main body, and a handle is arranged on the large end surface of the circular truncated cone main body; by adopting the conical auxiliary tool, the wire core spacing is ensured, and the cable is prevented from being excessively damaged by elastic deformation or artificial forced bending; the method is suitable for the manufacturing process of medium-voltage cable terminal heads and intermediate heads, and achieves the purposes of facilitating construction and improving process quality.

Description

A tapered instrument for making of middling pressure cable head

Technical Field

The invention relates to a conical tool for manufacturing a medium-voltage cable head, and belongs to the technical field of electric power.

Background

In the prior art, a cable head maker manually bends a cable core out of a certain radian to deform the cable core so as to separate the cable core. For example, the fiber cores of the cable are spread at the separated parts of the three-phase wire cores, so that the distance between each phase is increased, and the copper-shielded outer semi-conducting layer is convenient to strip and cut; at present, constructors bend the cable cores with certain radian hard to deform the cable cores, and then the distance between the cable cores meets the requirement of construction convenience.

When the preparation cable head, the artificial three-phase sinle silk of bending produces elastic deformation and parts the back, is mostly crosslinked polyethylene material because of the medium voltage cable main insulation, and the conductor is copper or aluminium material, resumes very fast behind the elastic deformation, and the unsatisfied requirement of sinle silk interval after resuming, inconvenient construction. If the artificial bending force is too large, the cable core is greatly deformed, the main insulating material is extruded and is not symmetrical, the electric field distribution is not uniform in the cable operation process, the service life of the cable is shortened, and the cable is broken down.

Disclosure of Invention

The invention aims to provide a conical tool for manufacturing a medium-voltage cable head, which aims to solve the problems of difficult construction, poor process and even cable damage caused by insufficient space between three phase wire cores of a cable in the background technology.

The technical scheme of the invention is as follows:

a tapered tool for medium voltage cable head manufacture, comprising:

the circular table main body is provided with a plurality of annular array phase guide grooves in the axis.

Preferably, a handle is mounted on the large end face of the circular truncated cone main body.

Preferably, the circular truncated cone main part and/or the handle are made of wood materials, so that damage to an outer semi-conducting layer and main insulation of the cable caused by metal materials is avoided.

Preferably, the handle is kept away from round platform main part one end and is the arcwall face structure, and the arc structure does not have edges and corners and can not hinder the hand, conveniently takes out the round platform main part from the cable core through the handle.

Preferably, the looks guide slot extends to big terminal surface from round platform main part tip edge and is the gradually curved groove structure of internal diameter, interval between the looks guide slot increases progressively from round platform main part tip to big terminal surface to each looks of messenger's cable three-phase sinle silk all laminates well what in the inslot, the difficult skew in position.

Preferably, there are three sets of said phase guiding channels.

Preferably, the side wall of the round table main body staggered phase guide groove is movably connected with an elastic strip.

Preferably, the elastic strip is evenly provided with adjusting holes along the length direction.

Preferably, one end of the elastic strip is movably connected to the side wall of the circular truncated cone body through a connecting piece, and the connecting piece is in clamping fit with any group of adjusting holes.

Preferably, the cable core elastic adjusting wedge-shaped piece is matched with the structure of the guide groove.

The invention has the following beneficial effects:

by adopting the conical auxiliary tool, the space between the wire cores is ensured, and the cable is prevented from being excessively damaged by elastic deformation or artificial forced bending; the method is suitable for the manufacturing process of medium-voltage cable terminals and intermediate terminals, and achieves the purposes of facilitating construction and improving process quality.

In order to avoid the separation of the circular truncated cone main body caused by insufficient clamping force of a plurality of cable cores in the process of stripping the copper shielding layer and the outer semi-conducting layer of the cable core, the elastic strip is wound on the cable core to assist in clamping the circular truncated cone main body so as to improve the clamping force;

or the wire core tightness adjusting wedge-shaped piece is inserted into the phase guide groove, and the tightness degree of the position is adjusted through the plugging depth.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

The reference numbers in the figures denote:

1. a circular truncated cone main body; 2. a phase guide groove; 3. a handle; 4. an elastic strip; 5. a connecting member; 6. an adjustment hole; 7. the sinle silk elasticity adjusts wedge piece.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

Example (b):

as shown in fig. 1:

the round table main body 1, the handle 3 and the wire core tightness adjusting wedge-shaped sheet 7 are made of wood materials and can be insulated; the connecting piece 5 is in a rivet structure made of insulating materials; the elastic strip 4 is an elastic deformable and insulated rubber strip;

the side wall of the circular truncated cone main body 1 is provided with three groups of phase guide grooves 2 in an annular array by taking the axis of the circular truncated cone main body as the center, and the phase guide grooves 2 extend from the small end surface to the large end surface of the circular truncated cone main body 1 and are of an arc-shaped groove structure with gradually increased inner diameter; the central position of the large end surface of the circular truncated cone main body 1 is fixedly connected with a handle 3, the outer diameter of the handle 3 is gradually increased from the large end surface of the circular truncated cone main body 1 to the other end, and the other end of the handle 3 is of a hemispherical structure.

In the manufacturing process of a medium-voltage cable terminal (three-wire core) and a middle head, a circular table main body 1 is placed at a cable core branch, the small end face of the circular table main body 1 faces a cable core, the circular table main body 1 is pushed by a handle 3 to be inserted into three cable cores, so that the cable cores are relatively inserted into corresponding phase guide grooves 2, the three cable cores are automatically separated along a set direction under the limiting guide of the phase guide grooves 2, and the clamping force (elastic deformation) among the three cable cores enables the circular table main body 1 to be kept at a fixed position so that the space between the cable cores meets the construction requirement, a copper screen layer is conveniently girdled, and burrs are reduced; the outer semi-conducting layer can be cut circularly and chamfered conveniently. The construction difficulty is reduced, and the construction quality is improved.

Because the sinle silk is laminated all the time at 2 inside walls of the looks guide slot that correspond for three sinle silks' elastic deformation degree is the same, guarantees to resume back sinle silk interval the same.

The distance between every two adjacent guide grooves 2 increases progressively from the small end face to the big end face of each guide groove 2, and the distance between each guide groove 2 and the axis of the circular truncated cone main body 2 starts to increase progressively from the small end face to the big end face of each guide groove 2. So that the wire core is slowly and elastically deformed and separated under the track guidance of the phase guide groove 2.

The elastic deformation separation degree of the three wire cores guided by the circular truncated cone main body 1 is fixed, and the cable cannot be damaged due to manual forced bending excessive.

One end of each elastic strip 4 is freely and rotatably connected to the outer side wall of the circular truncated cone main body 1 through a connecting piece 5, a plurality of adjusting holes 6 are formed in the two ends of each elastic strip 4 at equal intervals in a straight line, and the adjusting holes 6 are matched with the structure of the connecting pieces 5;

during the use, elasticity strip 4 encircles cable core outside round to form closed loop structure with connecting piece 5 and 6 joints of a set of regulation hole (can use external force to break away from) cooperation wherein, at this moment, closed loop structure's elasticity strip 4 ties up three cable core groups relatively in the corresponding looks guide slot 2 of round platform main part 1, improves the clamp force.

The connecting piece 5 is connected with different adjusting holes 6 in a clamping mode to adjust the tightness degree of the elastic strip 4 of the closed loop.

Appearance and 2 looks guide slot looks adaptation of sinle silk elasticity regulation wedge piece 7, in order to adjust the crooked degree of the relative round platform main part of cable core 1, insert between 2 inside walls of looks guide slot and the cable core that corresponds along 1 axis direction of round platform main part with sinle silk elasticity regulation wedge piece 7, can be according to the elasticity degree of the depth adjustment cable core of filling in between this department and the round platform main part 1.

Compared with the method that an auxiliary tool is not adopted in the manufacturing process of the existing cable head, the proposal reduces the possibility of damaging the copper shielding and the main insulation of the cable during construction due to insufficient space between three phase wire cores of the cable, reduces the manufacturing difficulty of the cable terminal head and the middle head, and improves the process quality.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. The utility model provides a tapered tool for medium voltage cable head preparation which characterized in that: the method comprises the following steps:

the circular table comprises a circular table main body (1), wherein the circular table main body (1) is provided with a plurality of annular array phase guide grooves (2) by the axis of the circular table main body.

2. The tapered tool for medium voltage cable head manufacture according to claim 1, wherein: the big end face of the round table main body (1) is provided with a handle (3).

3. The tapered tool for medium voltage cable head manufacture according to claim 2, wherein: the round table main body (1) and/or the handle (3) are/is made of wood materials.

4. The tapered tool for medium voltage cable head manufacture according to claim 2, wherein: one end of the handle (3) far away from the round table main body (1) is of an arc-shaped surface structure.

5. The tapered tool for medium voltage cable head manufacture according to claim 1, wherein: the phase guide grooves (2) extend to the large end face from the edge of the small end face of the circular truncated cone body (1) and are of arc-shaped groove structures with gradually increased inner diameters, and the distance between the phase guide grooves (2) is gradually increased from the small end face of the circular truncated cone body (1) to the large end face.

6. The tapered tool for medium voltage cable head manufacture according to claim 5, wherein: three groups of phase guide grooves (2) are provided.

7. The tapered tool for medium voltage cable head manufacture according to claim 5, wherein: the side wall of the round table main body (1) staggered with the guide grooves (2) is movably connected with elastic strips (4).

8. The tapered tool for medium voltage cable head manufacture according to claim 7, wherein: the elastic strip (4) is evenly provided with adjusting holes (6) along the length direction.

9. The tapered tool for medium voltage cable head manufacture according to claim 8, wherein: one end of each elastic strip (4) is movably connected to the side wall of the circular truncated cone main body (1) through a connecting piece (5), and the connecting pieces (5) are in clamping fit with any group of adjusting holes (6).

10. The tapered tool for medium voltage cable head manufacture according to claim 5, wherein: still include at least a set of sinle silk elasticity adjusting wedge piece (7), sinle silk elasticity adjusting wedge piece (7) and the structure looks adaptation of looks guide slot (2).