CN212461210U

CN212461210U - Low-voltage power cable for laying at bottom of river of 1kV or below

Info

Publication number: CN212461210U
Application number: CN202021600667.2U
Authority: CN
Inventors: 卢岩; 侯虹剑; 宗建华; 宋锦; 张东初
Original assignee: Zhongtian Technology Submarine Cable Co Ltd
Current assignee: Zhongtian Technology Submarine Cable Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-02-02
Anticipated expiration: 2030-08-05

Abstract

The utility model discloses a 1kV and following river bottom lay and use low voltage power cable contains a plurality of insulated wire, blocks water around covering, waterproof layer, armor, polypropylene rope winding layer, and a plurality of insulated wire transposition each other blocks water and sets gradually in a plurality of insulated wire outsides from inside to outside around covering, waterproof layer, armor, polypropylene rope winding layer. The utility model discloses satisfy the waterproof requirement of the depth of water at the bottom of the river and have the ability of reply complicated topography at the bottom of the river and lay the condition.

Description

Low-voltage power cable for laying at bottom of river of 1kV or below

Technical Field

The utility model relates to a low voltage power cable, especially a 1kV and following river bottom lay and use low voltage power cable belongs to the cable field.

Background

At present, low-voltage power or lighting cables of 1kV or below for wading are more and more in demand, such as the development of the islands of Wuhan river in Hubei province, the lighting of fishing rows on the offshore beach of a smoke station, the laying of the islands of Dongting lake bottoms in Hunan province and the like, the laying water depth is mostly not more than 50 meters, and the existing design concept of medium-high voltage, large-length and large-water-depth submarine cables is high in cost and heavy and is not suitable for the occasions.

The existing conventional low-voltage power cable structure for the land only considers the waterproof performance under the pressure of 1 meter of water column, basically soaks water naturally, is close to the waterproof in the aspect of natural penetration under the non-pressure state, and the cable waterproof design mostly adopts a mode of extruding and wrapping a polyethylene protective layer, so that the occasional wading laying on the land can be met, and the laying conditions of pipe penetration, bridge frames, underground, cable wells and the like are required. When civil power and illumination are carried out on the land island by crossing rivers and lakes, the factors in the aspects of water pressure, water flow impact, external force mechanical impact and laying traction need to be considered under the condition that the water depth is 20-30 meters, even 50 meters and the water flow velocity is possessed, and the existing common land cable structure design in China can only be partially met.

Therefore, it is necessary to design a low-voltage power cable for laying at the bottom of a river of 1kV or below, and the defects of the prior art are overcome.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a 1kV and following river bottom lay and use low voltage power cable is provided, satisfy the waterproof requirement of the depth of water at the bottom of the river and have the ability of coping with the complicated topography at the bottom of the river and lay the condition.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a 1kV and following river end lay and use low voltage power cable which characterized in that: contain a plurality of insulated wire, block water around covering, waterproof layer, armor, pitch coat and polypropylene rope winding layer, a plurality of insulated wire transposition each other, block water and set gradually in a plurality of insulated wire outsides from inside to outside around covering, waterproof layer, armor, pitch coat and polypropylene rope winding layer.

Furthermore, the insulated wire comprises a water-blocking conductor, an insulating layer and an insulating waterproof layer, wherein the insulating layer is arranged on the outer side of the water-blocking conductor, and the insulating waterproof layer is arranged on the outer side of the insulating layer.

Furthermore, the water blocking conductor is composed of conductors and water blocking paste, and the water blocking paste is filled between the conductor gaps.

Further, the insulating layer is made of a cross-linked polyethylene insulating material.

Furthermore, the insulating waterproof layer adopts a comprehensive protective layer consisting of an aluminum-plastic composite layer and a polyethylene protective layer, the aluminum-plastic composite layer is longitudinally wrapped on the outer side of the insulating layer by an aluminum-plastic composite belt, and the polyethylene protective layer is extruded on the outer side of the aluminum-plastic composite layer.

Furthermore, water-blocking filling ropes are filled in gaps between the insulating wires and the water-blocking wrapping layer.

Furthermore, the water-blocking wrapping layer is wrapped on the outer sides of the insulated wires by adopting a double-sided water-blocking tape.

Furthermore, the waterproof layer is wrapped outside the waterproof wrapping layer in a squeezing mode through polyethylene waterproof materials.

Furthermore, the armor layer is wound outside the waterproof layer by adopting thick steel wires.

Further, the asphalt coating layer is coated on the outer side of the thick steel wire armor layer, and the polypropylene rope winding layer is wound on the outer side of the asphalt coating layer by adopting a polypropylene high-strength PP fiber rope.

Compared with the prior art, the utility model, have following advantage and effect: the utility model discloses a low voltage power cable for river bottom laying of 1kV and below meets the water depth waterproof requirement of the river bottom and has the capability of coping with the laying conditions of the complicated topography of the river bottom; the semi-conductive water-blocking paste is filled in the gaps of the conductor monofilaments in the production process, so that the water-blocking effect of the conductor is improved; the aluminum-plastic composite and polyethylene comprehensive protective layer is added outside the insulating layer to ensure radial water resistance of the low-voltage cable, so that the cable meets certain water pressure resistance and water resistance, and meanwhile, the strength of the insulating layer is increased to prevent the insulating bulge caused by water absorption expansion of the water-resistant conductor; the adoption of the galvanized thick steel wire armor can lead the cable to have higher longitudinal tensile property, thus being beneficial to laying the cable; the asphalt coating and polypropylene high-strength PP fiber rope can improve the corrosion resistance of the cable and the capability of coping with the complicated topography of the river bottom and the laying conditions.

Drawings

Fig. 1 is a schematic diagram of the low-voltage power cable for laying at the bottom of a river of 1kV and below of the utility model.

Detailed Description

To elaborate on the technical solution adopted by the present invention for achieving the predetermined technical purpose, the technical solution in the embodiment of the present invention will be clearly and completely described below by combining with the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a partial embodiment of the present invention, not a whole embodiment, and technical means or technical features in the embodiment of the present invention can be replaced without paying creative efforts, and the present invention will be described in detail below by combining with the embodiments with reference to the drawings.

As shown in fig. 1, the utility model discloses a 1kV reaches following river end and lays and use low voltage power cable contains a plurality of insulated wire, blocks water around covering 5, waterproof layer 6, armor 7, pitch coat 8 and polypropylene rope winding layer 9, and a plurality of insulated wire transposition each other blocks water and sets gradually in a plurality of insulated wire outsides from inside to outside around covering 5, waterproof layer 6, armor 7, pitch coat 8 and polypropylene rope winding layer 9.

The insulated wire comprises a water-blocking conductor 1, an insulating layer 2 and an insulating waterproof layer 3, wherein the insulating layer 2 is arranged on the outer side of the water-blocking conductor 1, and the insulating waterproof layer 3 is arranged on the outer side of the insulating layer.

The water-blocking conductor 1 is composed of conductors and water-blocking paste, and the water-blocking paste is filled between the conductor gaps. And a water-blocking paste filling mode is adopted to ensure the water-blocking performance of the conductor and avoid the influence of the water-absorbing process of the water-blocking tape on the insulating layer 2. The insulating layer 2 is made of cross-linked polyethylene insulating material. The insulating waterproof layer 3 adopts a comprehensive protective layer consisting of an aluminum-plastic composite layer and a polyethylene protective layer, the aluminum-plastic composite layer is longitudinally wrapped on the outer side of the insulating layer 2 by an aluminum-plastic composite belt, and the polyethylene protective layer is extruded on the outer side of the aluminum-plastic composite layer. The comprehensive sheath layer is extruded by the aluminum-plastic composite longitudinal wrapping and polyethylene materials, so that the waterproof requirement of the cable laid under the water depth pressure of 50 meters can be met.

And a water-blocking filling rope 4 is filled in a gap between the insulated wires and the water-blocking wrapping layer 5, so that the longitudinal water resistance of the cable core is ensured. The water-blocking wrapping layer 5 is wrapped outside the insulated wires by adopting a double-sided water-blocking tape. The waterproof layer 6 is extruded and wrapped outside the waterproof wrapping layer 5 by adopting a polyethylene waterproof material.

The armor layer 7 is wound outside the waterproof layer 6 by adopting thick steel wires, 5.0mm galvanized steel wires are adopted under the general condition, and the outer diameter of the galvanized steel wires can be properly increased if the longitudinal tension value of the cable needs to be improved by integrating the cross section of the cable, the length of the cable, the flow velocity of water and the like.

The asphalt coating layer 8 is coated on the outer side of the armor layer 7 by adopting asphalt, and the polypropylene rope winding layer 9 is wound on the outer side of the asphalt coating layer 8 by adopting a polypropylene high-strength PP fiber rope.

The utility model discloses a low voltage power cable for river bottom laying of 1kV and below meets the water depth waterproof requirement of the river bottom and has the capability of coping with the laying conditions of the complicated topography of the river bottom; the conductor is filled with the water-blocking paste, so that the filling coefficient is high, the water-blocking effect is obviously improved, and the influence of the wrapping water-blocking tape structure on the outer layer of the conductor on the insulating layer when the water-blocking tape structure absorbs water and expands is avoided; the aluminum-plastic composite longitudinal wrap and the polyethylene comprehensive protective layer are added outside the insulating layer, so that the water pressure resistant and waterproof effects of the low-voltage cable can be ensured, the insulating layer is protected, and the insulating bulge phenomenon in the waterproof process of the low-voltage cable is effectively avoided; when the cable is laid in wading, factors such as water flow impact, ship anchor mechanical external force impact, laying traction and the like are considered, and the rough galvanized steel wire armor is adopted, so that the longitudinal tension of the cable can be ensured to meet the conditions; the asphalt coating and polypropylene high-strength PP fiber rope can improve the corrosion resistance of the cable and the capability of coping with the complicated topography of the river bottom and the laying conditions.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment without departing from the technical scope of the present invention, but all the modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principle of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a 1kV and following river end lay and use low voltage power cable which characterized in that: contain a plurality of insulated wire, block water around covering, waterproof layer, armor, pitch coat and polypropylene rope winding layer, a plurality of insulated wire transposition each other, block water and set gradually in a plurality of insulated wire outsides from inside to outside around covering, waterproof layer, armor, pitch coat and polypropylene rope winding layer.

2. The low-voltage power cable for laying at the river bottom of 1kV or below according to claim 1, which is characterized in that: the insulated wire comprises a water-blocking conductor, an insulating layer and an insulating waterproof layer, wherein the insulating layer is arranged on the outer side of the water-blocking conductor, and the insulating waterproof layer is arranged on the outer side of the insulating layer.

3. The low-voltage power cable for river bottom laying of 1kV or below according to claim 2, characterized in that: the water-blocking conductor is composed of conductors and water-blocking paste, and the water-blocking paste is filled between single-wire gaps of the conductors.

4. The low-voltage power cable for river bottom laying of 1kV or below according to claim 2, characterized in that: the insulating layer is made of cross-linked polyethylene insulating material.

5. The low-voltage power cable for river bottom laying of 1kV or below according to claim 2, characterized in that: the insulating waterproof layer adopts the comprehensive sheath that comprises plastic-aluminum composite bed and polyethylene sheath, and the plastic-aluminum composite bed adopts the plastic-aluminum composite tape to indulge the packet in the outside of insulating layer, and the polyethylene sheath crowded package is in the plastic-aluminum composite bed outside.

6. The low-voltage power cable for laying at the river bottom of 1kV or below according to claim 1, which is characterized in that: and water-blocking filling ropes are filled in gaps between the insulating wires and the water-blocking wrapping layer.

7. The low-voltage power cable for laying at the river bottom of 1kV or below according to claim 1, which is characterized in that: the water-blocking wrapping layer is wrapped on the outer sides of the insulated wires by adopting a double-sided water-blocking tape.

8. The low-voltage power cable for laying at the river bottom of 1kV or below according to claim 1, which is characterized in that: the waterproof layer is wrapped outside the waterproof wrapping layer in a squeezing mode through polyethylene waterproof materials.

9. The low-voltage power cable for laying at the river bottom of 1kV or below according to claim 1, which is characterized in that: the armor layer is wound on the outer side of the waterproof layer by adopting thick steel wires.

10. The low-voltage power cable for laying at the river bottom of 1kV or below according to claim 1, which is characterized in that: the asphalt coating layer is coated on the outer side of the thick steel wire armor layer, and the polypropylene rope winding layer is wound on the outer side of the asphalt coating layer by adopting a polypropylene high-strength PP fiber rope.