CN216053961U - Ultrahigh-voltage crosslinked polyethylene insulated power cable - Google Patents

Abstract

The utility model discloses an ultrahigh-voltage crosslinked polyethylene insulated power cable which comprises a protective sheath, wherein an anti-corrosion layer is arranged on the inner side of the protective sheath, an outer insulating layer is arranged on the inner side of the anti-corrosion layer, a cable core penetrates through the middle of the outer insulating layer, an internal insulating protective layer is arranged on the outer surface of the cable core, an anti-pulling sleeve is arranged on the outer wall of the internal insulating protective layer, an axial reinforcing strip is arranged on the outer surface of the anti-pulling sleeve, a buffer annular pad is sleeved on the outer side of the axial reinforcing strip, two support rings are arranged on the outer surface of the buffer annular pad, and buffer rods are arranged between the support rings and the end parts of the support rings positioned in a synchronous plane. The cable is provided with the support ring, the buffer annular pad, the axial reinforcing strip, the tensile sleeve and the buffer rod, so that the overall performance of the cable can be enhanced, external bending and stretching are resisted, and damage or fracture of a battery core or a conductor in the cable is effectively avoided.

Description

Ultrahigh-voltage crosslinked polyethylene insulated power cable

Technical Field

The utility model relates to the technical field of cables, in particular to an ultrahigh-voltage crosslinked polyethylene insulated power cable.

Background

With the rapid development of social economy, a cable is generally a rope-like cable formed by twisting several or several groups of wires (at least two in each group), each group of wires is insulated from each other and is usually twisted around a center, the whole cable is wrapped by a highly-insulated covering layer, the cable has the characteristics of internal electrification and external insulation, the cable comprises a power cable, a control cable, a compensation cable, a shielding cable, a high-temperature cable, a computer cable, a signal cable, a coaxial cable, a fire-resistant cable, a marine cable, a mining cable, an aluminum alloy cable and the like, and the cable can be divided into a direct current cable and an alternating current cable according to a system of a photovoltaic power station.

However, the existing cable has a simple internal structure, and the cable core and the conductor are easily damaged when the cable is bent and stretched; therefore, the existing requirements are not met, and an ultrahigh voltage crosslinked polyethylene insulated power cable is provided for the purpose.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an ultrahigh-voltage crosslinked polyethylene insulated power cable, which solves the problems that the conventional cable provided by the background art has a simple internal structure, and easily damages a cable core and a conductor in the cable during bending and stretching.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an insulating power cable of superhigh pressure crosslinked polyethylene, includes the protection crust, the inboard of protection crust is provided with anti-corrosion coating, anti-corrosion coating's inboard is provided with outer insulating layer, the centre of outer insulating layer is run through and is provided with cable core, cable core's surface is provided with inside insulating inoxidizing coating, the outer wall of inside insulating inoxidizing coating is provided with tensile cover, tensile cover's surface is provided with the axial and strengthens the strip, the outside cover that the axial strengthened the strip has buffering annular pad, the surface of buffering annular pad is provided with two support rings, the support ring all is provided with the buffer beam with between the tip and the tip for being located the support ring in the coplanar, the both ends of buffer beam all peg graft inside and support ring sliding connection at the tip of support ring.

Preferably, tensile cover adopts the steel wire to form in the crooked winding in the outside of internal insulation inoxidizing coating and laminating each other between steel wire and the steel wire, be provided with the draw-in groove along the axis direction of internal insulation inoxidizing coating on the outer wall of tensile cover, the axial is strengthened the strip and is passed through the draw-in groove with the axial and be connected.

Preferably, a cavity is arranged inside the buffer annular cushion, and the inner side of the cavity is filled with inert gas.

Preferably, the main material of the internal insulation protective layer is rubber, a shielding layer is arranged inside the internal insulation protective layer, and the shielding layer is formed by weaving a metal material.

Preferably, the buffer rod is inserted into the end face of the end part of the support ring and provided with an anti-falling sheet, and a buffer spring is arranged between the anti-falling sheet and the support ring.

Preferably, the outer surface of the protective outer skin is provided with a waterproof layer, and the waterproof layer is formed by covering the outer side of the protective outer skin with waterproof paint and drying the waterproof layer.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, through-the buffer annular pad is arranged between the outer insulating layer and the inner insulating protective layer, and two support rings connected through the buffer rod and the buffer spring are arranged on the outer side of the buffer annular pad, when the cable is externally pressurized, the two support rings are mutually attached to compress the buffer annular pad, and simultaneously the buffer rod shrinks towards the inside of the support rings and compresses the buffer spring, so that the external pressure is effectively resisted and weakened through the elastic properties of the buffer annular pad and the buffer spring, the pressure of a cable core is reduced, and the damage or fracture of an electric core or a conductor in the cable is effectively avoided;

2. according to the utility model, the tensile sleeve is formed by completely winding the steel wire on the outer side of the internal insulation protective layer and mutually laminating the steel wire and the steel wire, and the plurality of axial reinforcing strips along the axial direction of the internal insulation protective layer are clamped in the outer wall of the tensile sleeve, so that the tensile and bending resistance inside the cable is effectively enhanced, the cable core of the internal cable is prevented from being completely stretched and broken in the laying or transportation process of the cable, and the integrity of the cable is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic structural view of the tensile sleeve of the present invention;

fig. 3 is a schematic structural diagram of the support ring of the present invention.

In the figure: 1. a protective sheath; 2. a cable core; 3. an inner insulating protective layer; 4. an anti-corrosion layer; 5. an outer insulating layer; 6. a support ring; 7. a cushion ring pad; 8. an axial reinforcing bar; 9. a tensile sleeve; 10. a buffer rod; 11. a buffer spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 3, an embodiment of the present invention includes: the utility model provides an insulating power cable of superhigh pressure crosslinked polyethylene, including protection crust 1, the inboard of protection crust 1 is provided with anti-corrosion coating 4, anti-corrosion coating 4's inboard is provided with outer insulating layer 5, the centre of outer insulating layer 5 is run through and is provided with cable core 2, the surface of cable core 2 is provided with inside insulating inoxidizing coating 3, the outer wall of inside insulating inoxidizing coating 3 is provided with tensile cover 9, the surface of tensile cover 9 is provided with axial strengthening strip 8, the outside cover of axial strengthening strip 8 has buffering ring gasket 7, the surface of buffering ring gasket 7 is provided with two support rings 6, support ring 6 and for all being provided with buffer beam 10 between the tip and the tip of support ring 6 that are located the coplanar, the both ends of buffer beam 10 are all pegged graft at the inside and support ring 6 sliding connection of tip of support ring 6.

Further, tensile cover 9 adopts the steel wire to form in laminating each other between the crooked winding in the outside of internal insulation inoxidizing coating 3 and steel wire, is provided with the draw-in groove along the axis direction of internal insulation inoxidizing coating 3 on the outer wall of tensile cover 9, and axial strengthening strip 8 is connected through the draw-in groove with axial strengthening strip 8, and the tensile property inside the tensile cover 9 effectual reinforcing cable of the tensile cover that forms of laminating each other between crooked winding and steel wire and the steel wire.

Further, the inside of buffering ring gasket 7 is provided with the cavity, and the inboard packing of cavity has inert gas for buffering ring gasket 7 has fine elasticity, can carry out elastic buffer, and inside gas leakage just can not lead to the fact the corruption to cable inside.

Further, the main material of the internal insulation protective layer 3 is rubber, the shielding layer is arranged inside the internal insulation protective layer 3 and is woven by metal materials, and therefore when the inside theater of the cable is guaranteed, external interference signals are effectively shielded.

Further, buffer rod 10 is pegged graft and is provided with the anticreep piece at the tip terminal surface of support ring 6, and the centre of anticreep piece and support ring 6 is provided with buffer spring 11 for even support ring 6 can cushion when the pressurized is close to each other, reduces cable core 2's pressure, and is convenient for two support rings 6 reset after pressure disappears.

Further, the surface of protection crust 1 is provided with the waterproof layer, and the waterproof layer is covered at the dry back in the protection crust 1 outside by waterproof coating and is formed, effectually keeps apart external moisture or oil stain and cable are whole, reduces the corrosion efficiency of protection crust 1, effectual extension cable life.

The working principle is as follows: when in use, firstly, the formed internal insulation protective layer 3 is sleeved on the outer side of the cable core 2, then the steel wire is completely wound on the outer side of the internal insulation protective layer 3, the steel wire and the steel wire are mutually attached to form the tensile sleeve 9, after the tensile sleeve 9 is formed and covers the outer wall of the internal insulation protective layer 3, the outer wall of the tensile sleeve 9 is milled to carry out clamping groove processing, the axial reinforcing strip 8 is clamped in the outer wall of the tensile sleeve 9 after the clamping groove processing is finished, then a plurality of buffering annular cushions 7 are uniformly distributed on the outer side of the axial reinforcing strip 8 along the axial direction of the cable core 2 according to equal intervals, at the moment, two supporting rings 6 are respectively clamped on the outer side of the same buffering annular cushion 7, then the buffering spring 11 is installed into the end part of the supporting ring 6, and then the two ends of the buffering rod 10 are both inserted in the buffering end parts of the adjacent supporting rings 6, after two support rings 6 interconnect, with the outer insulating layer 5 cover in the outside of a plurality of evenly distributed's after the equipment support ring 6, again with anti-corrosion coating 4 cover in the outside of anti-corrosion coating 4, cover protection crust 1 at last and carry out water repellent treatment in the outside of anti-corrosion coating 4 to the surface of protection crust 1, can strengthen the wholeness ability of cable, resist external bending and tensile, damage or fracture appear in effectual inside electric core of avoiding cable or conductor.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides an ultra-high voltage crosslinked polyethylene insulated power cable, includes protection crust (1), its characterized in that: an anti-corrosion layer (4) is arranged on the inner side of the protective outer skin (1), an outer insulating layer (5) is arranged on the inner side of the anti-corrosion layer (4), a cable core (2) is arranged in the middle of the outer insulating layer (5) in a penetrating way, an inner insulating protective layer (3) is arranged on the outer surface of the cable core (2), the outer wall of the internal insulation protective layer (3) is provided with a tensile sleeve (9), the outer surface of the tensile sleeve (9) is provided with an axial reinforcing strip (8), a buffer annular pad (7) is sleeved outside the axial reinforcing strip (8), two support rings (6) are arranged on the outer surface of the buffer annular pad (7), buffer rods (10) are arranged between the end parts of the support ring (6) and the support ring (6) which are positioned in the synchronous plane, two ends of the buffer rod (10) are inserted into the end part of the support ring (6) and are connected with the support ring (6) in a sliding mode.

2. The ultra-high voltage crosslinked polyethylene insulated power cable according to claim 1, characterized in that: tensile cover (9) adopt the steel wire in the crooked winding in the outside of internal insulation inoxidizing coating (3) and the steel wire between laminating each other and form, be provided with the draw-in groove along the axis direction of internal insulation inoxidizing coating (3) on the outer wall of tensile cover (9), strip (8) are strengthened through the draw-in groove with the axial to axial (8) and are connected.

3. The ultra-high voltage crosslinked polyethylene insulated power cable according to claim 1, characterized in that: a cavity is arranged inside the buffer annular pad (7), and inert gas is filled inside the cavity.

4. The ultra-high voltage crosslinked polyethylene insulated power cable according to claim 1, characterized in that: the main material of the internal insulation protective layer (3) is rubber, a shielding layer is arranged inside the internal insulation protective layer (3), and the shielding layer is formed by weaving metal materials.

5. The ultra-high voltage crosslinked polyethylene insulated power cable according to claim 1, characterized in that: the buffer rod (10) is inserted into the end face of the end part of the support ring (6) and is provided with an anti-falling sheet, and a buffer spring (11) is arranged between the anti-falling sheet and the support ring (6).

6. The ultra-high voltage crosslinked polyethylene insulated power cable according to claim 1, characterized in that: the waterproof layer is arranged on the outer surface of the protective outer skin (1) and is formed by covering the outer side of the protective outer skin (1) with waterproof paint and drying the waterproof layer.

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