CN213601674U

CN213601674U - Cross-linked polyethylene insulation high-density polyethylene sheath water-blocking power cable

Info

Publication number: CN213601674U
Application number: CN202022731853.6U
Authority: CN
Inventors: 孙亮; 卢鹏程; 何宏亮; 凌群
Original assignee: Anhui Huadian Wire & Cable Group Co ltd
Current assignee: Anhui Huadian Wire & Cable Group Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-07-02
Anticipated expiration: 2030-11-20

Abstract

The utility model provides a crosslinked polyethylene insulating high density polyethylene sheath power cable that blocks water, including the cable core, from inside to outside around the outer interior water blocking tape of cable core around covering, aluminium-plastic composite band and inner liner, galvanized steel wire armor, outer water blocking tape around covering and high density polyethylene restrictive coating, the cable core is twisted into the type by three insulation core that are "article" font and distribute, is equipped with the filling layer in the space between three insulation core, the filling layer is the filling rope that blocks water; set up the mechanism that blocks water in the high density polyethylene restrictive coating, the mechanism that blocks water includes waterproof layer and lower waterproof layer, it all is equipped with bulge and depressed part with the relative one side of waterproof layer down to go up the waterproof layer, go up the crisscross meshing of bulge and depressed part of waterproof layer and lower bulge and depressed part of waterproof layer, and the position packing of the crisscross meshing of bulge and depressed part and the lower bulge of waterproof layer of going up the waterproof layer has the water inflation body.

Description

Cross-linked polyethylene insulation high-density polyethylene sheath water-blocking power cable

Technical Field

The utility model relates to a wire and cable technical field indicates a crosslinked polyethylene insulation high density polyethylene sheath power cable that blocks water especially.

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy, including various voltage classes, 1-500KV and above, and various insulated power cables. The basic structure of the power cable is composed of four parts, namely a wire core (conductor), an insulating layer, a shielding layer and a protective layer. It can be classified into medium and low voltage power cables (35 kv and below), high voltage cables (110 kv and above), ultra high voltage cables (275-800 kv) and extra high voltage cables (1000 kv and above) according to voltage class. Further, the electric current system may be divided into an ac cable and a dc cable.

The existing cable is usually used in a severe environment, and when the water-blocking and moisture-proof properties are not good enough, the internal conductive core of the cable is affected by damp. Therefore, the utility model provides an insulating high density polyethylene sheath of crosslinked polyethylene power cable that blocks water to solve the above-mentioned problem that exists.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art's shortcoming, provide a power cable that blocks water of insulating high density polyethylene sheath of crosslinked polyethylene.

In order to solve the technical problem, the utility model provides a following technical scheme: a crosslinked polyethylene insulation high-density polyethylene sheath water-blocking power cable comprises a cable core, an inner water-blocking tape wrapping layer wrapping the cable core from inside to outside, an aluminum-plastic composite tape, an inner liner layer, a galvanized steel wire armor layer, an outer water-blocking tape wrapping layer and a high-density polyethylene sheath layer, wherein the cable core is formed by twisting three insulating wire cores distributed in a shape like a Chinese character 'pin', a filling layer is arranged in a gap between the three insulating wire cores, and the filling layer is a water-blocking filling rope; set up the mechanism that blocks water in the high density polyethylene restrictive coating, the mechanism that blocks water includes waterproof layer and lower waterproof layer, it all is equipped with bulge and depressed part with the relative one side of waterproof layer down to go up the waterproof layer, go up the crisscross meshing of bulge and depressed part of waterproof layer and lower bulge and depressed part of waterproof layer, and the position packing of the crisscross meshing of bulge and depressed part and the lower bulge of waterproof layer of going up the waterproof layer has the water inflation body.

As an optimal technical scheme of the utility model, the center of insulation core is equipped with the conductor, and the conductor winds the covering conductor shield outward, and the outer cladding insulating layer of conductor shield, the outside of insulating layer are equipped with the insulation shielding layer, the outer cladding semiconductor water-blocking area of insulation shielding layer adds the copper strips around the covering.

As an optimal technical scheme of the utility model, go up the waterproof layer and all be provided with the yarn that blocks water with the bulge inboard of lower waterproof layer.

As an optimized technical scheme, be equipped with a plurality of strengthening ribs in the high density polyethylene restrictive coating, a plurality of strengthening ribs are evenly arranged along cable core circumference direction.

As an optimized technical proposal of the utility model, the conductor is one of an annealed copper conductor, aluminum or an aluminum alloy conductor.

As an optimized technical scheme of the utility model, the water-swellable body is made by water-swellable material.

The utility model discloses the beneficial effect who reaches is: the utility model provides a pair of insulating high density polyethylene sheath of crosslinked polyethylene power cable that blocks water through the mechanism that blocks water that sets up for this cable block water effectually, can avoid inside the water infiltration cable, thereby prolong the life of cable.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

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

FIG. 2 is a schematic view of the water blocking mechanism of the present invention;

FIG. 3 is an enlarged schematic view of A in FIG. 2 according to the present invention;

fig. 4 is a schematic diagram of the structure of the insulated wire core of the present invention;

reference numbers in the figures: 1. the inner water blocking tape is wrapped; 2. an aluminum-plastic composite belt and an inner liner; 3. a galvanized steel wire armor layer; 4. an outer water-blocking tape wrapping layer; 5. a high density polyethylene sheath layer; 6. an insulated wire core; 7. a filling layer; 8. a water blocking mechanism; 9. a waterproof layer is arranged; 10 waterproof layers; 11. a water-swellable body; 12. a conductor; 13. a conductor shield layer; 14. an insulating layer; 15. a copper strip lapping layer is added to the semiconductor water-blocking tape; 16. water-blocking yarn; 17. reinforcing ribs; 18. and an insulating shielding layer.

Detailed Description

The terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like in the specification indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b): as shown in fig. 1-4, the utility model provides a pair of crosslinked polyethylene insulating high density polyethylene sheath power cable that blocks water, including the cable core, from inside to outside around the outer interior water blocking tape of cable core around covering 1, plastic-aluminum composite band and inside liner 2, galvanized steel wire armor 3, outer water blocking tape around covering 4 and high density polyethylene restrictive coating 5, the cable core is twisted into the type by three insulation core 6 that are "article" font and distribute, is equipped with filling layer 7 in the space between three insulation core 6, filling layer 7 is the filling rope that blocks water; set up water blocking mechanism 8 in the high density polyethylene restrictive coating 5, water blocking mechanism 8 includes waterproof layer 9 and lower waterproof layer 10, it all is equipped with bulge and depressed part to go up waterproof layer 9 and the relative one side of waterproof layer 10 down, go up the crisscross meshing of bulge and depressed part of waterproof layer 10 and lower waterproof layer 9's bulge and depressed part, and the position packing of the crisscross meshing of bulge and depressed part of going up waterproof layer 9 and lower waterproof layer 10 has water inflation body 11.

Further, a conductor 12 is arranged in the center of the insulated wire core 6, a conductor shielding layer 13 is wound and wrapped outside the conductor 12, an insulating layer 14 is wrapped outside the conductor shielding layer 13, an insulating shielding layer 18 is arranged outside the insulating layer 14, and a semiconductor water blocking tape and copper strip winding layer 15 is wrapped outside the insulating shielding layer 18.

Furthermore, the inner sides of the convex parts of the upper waterproof layer 9 and the lower waterproof layer 10 are both provided with water blocking yarns 16, so that the water blocking effect is good.

Furthermore, be equipped with a plurality of strengthening ribs 17 in the high density polyethylene restrictive coating 5, a plurality of strengthening ribs 17 are evenly arranged along cable core circumferential direction, are favorable to improving the bulk strength of cable.

Further, the conductor 12 is one of an annealed copper conductor, aluminum or aluminum alloy conductor.

Further, water-swellable body 11 is made of water-swellable material, and when water permeates into the interior of the cable, water-swellable body 11 expands to block water seepage seams, so that water is prevented from continuously permeating, and the waterproof effect is good.

The above embodiments are merely to describe the preferred embodiments of the present invention, and are not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

Claims

1. The cross-linked polyethylene insulated high-density polyethylene sheathed water-blocking power cable is characterized by comprising a cable core, an inner water-blocking tape wrapping layer (1) wrapped outside the cable core from inside to outside, an aluminum-plastic composite tape and an inner liner layer (2), a galvanized steel wire armor layer (3), an outer water-blocking tape wrapping layer (4) and a high-density polyethylene sheath layer (5), wherein the cable core is formed by twisting three insulating wire cores (6) distributed in a shape like a Chinese character 'pin', filling layers (7) are arranged in gaps among the three insulating wire cores (6), and the filling layers (7) are water-blocking filling ropes; set up in high density polyethylene restrictive coating (5) and block water mechanism (8), block water mechanism (8) including waterproof layer (9) and lower waterproof layer (10), it all is equipped with bulge and depressed part with waterproof layer (10) relative one side down to go up waterproof layer (9), go up the bulge and the crisscross meshing of bulge and depressed part and the lower waterproof layer (10) of waterproof layer (9), and the position of going up the bulge and the crisscross meshing of bulge and depressed part of bulge and the depressed part of waterproof layer (10) and lower waterproof layer (10) of waterproof layer (9) is filled and is met water inflation body (11).

2. The crosslinked polyethylene insulated high-density polyethylene sheathed water-blocking power cable according to claim 1, wherein the insulated wire core (6) is provided with a conductor (12) at the center, the conductor (12) is wrapped by a conductor shielding layer (13), the conductor shielding layer (13) is wrapped by an insulating layer (14), the insulating layer (14) is provided with an insulating shielding layer (18) at the outside, and the insulating shielding layer (18) is wrapped by a semiconductor water-blocking tape and a copper strip wrapping layer (15).

3. The insulated crosslinked polyethylene-insulated high-density polyethylene sheath water-blocking power cable according to claim 1, wherein the protruding parts of the upper waterproof layer (9) and the lower waterproof layer (10) are provided with water-blocking yarns (16) inside.

4. The power cable of claim 1, wherein the high density polyethylene sheath layer (5) is provided with a plurality of reinforcing ribs (17), and the plurality of reinforcing ribs (17) are uniformly arranged along the circumferential direction of the cable core.

5. A cross-linked polyethylene insulated high density polyethylene sheathed water-blocking power cable according to claim 2, characterized in that the conductor (12) is one of an annealed copper conductor, an aluminum or aluminum alloy conductor.

6. The cross-linked polyethylene insulated high-density polyethylene sheathed water-blocking power cable according to claim 1, characterized in that the water-swellable body (11) is made of a water-swellable material.