Light submarine cable
By designing lightweight submarine cables and using conductors and armor layers with specific structures, the problem of high construction difficulty in near-shore and shallow waters has been solved, achieving low-cost, simple cable laying and high-efficiency electrical performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-03-31
AI Technical Summary
Existing submarine cables are difficult and costly to install in nearshore shallow waters, and traditional double-layer steel wire armored cables are not suitable for laying in shallow waters.
Design a lightweight submarine cable with a core consisting of three conductors. Each conductor comprises a conductor, an inner shielding layer, an insulation layer, and an outer shielding layer, with an additional copper tape shielding layer. The outer sheath and linear armor layer are provided. The armor layer is made of stranded low-carbon galvanized steel wire and coated with a steel wire insulation layer, which meets electrical performance requirements while reducing the outer diameter and weight.
It enables simple laying of nearshore and shallow-sea cables, reducing construction difficulty and cost. The cable structure is simple, waterproof and tensile, and the unit weight is reduced by 40%. It is suitable for both flowing nearshore and stationary beach environments.
Smart Images
Figure CN224067442U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power cable technical field especially relates to a light weight submarine cable. BACKGROUND
[0002] At present, the general submarine cable is replaced for a long time, in order to respond to the external damage of the harsh working environment and complex environment, generally adopts double steel wire armor and double sheath structure, so that the outer diameter of the cable is big, and the weight is heavy, and the cable is usually laid with large work ship equipped with large crane, and the operation difficulty is very high, and the construction cost is high.
[0003] With the development of clean energy technology, offshore wind power resources make the construction of offshore wind power station more and more common, but the depth of offshore water is usually below 8 meters, and the large construction ship suitable for deep sea wiring is easy to be stranded, so the heavy double steel wire armor submarine cable is no longer suitable for the laying requirement of offshore shallow sea, therefore, a light weight submarine power cable suitable for offshore and shallow sea laying condition needs to be developed. SUMMARY
[0004] The utility model provides a light weight submarine cable for the problems in the prior art, which can meet the electrical performance of submarine power cable while reducing the outer diameter and weight of the cable, so that the laying of offshore and shallow sea submarine cable no longer depends on large construction ship, and the operation difficulty is relatively simple and the construction cost is low.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A kind of offshore light weight submarine cable, characterized by comprising wire, sheath, linear armor layer and armored insulation layer;
[0007] The wire has three, each wire includes conductor, inner shielding layer, insulation layer, outer shielding layer and copper band shielding layer, the conductor is a type line conductor with a compression coefficient greater than or equal to 0.98, the inner shielding layer is a high polymer material, which is extruded on the conductor to uniform the electric field, the insulation layer is a water tree resistant cross-linked polyethylene material, which prevents the cable from being broken down by water tree phenomenon, the outer shielding layer is extruded on the insulation layer, and the inner shielding layer also plays a role in uniforming the electric field, the copper band shielding layer is overlapped and wrapped on the outer shielding layer, with an overlap rate of 15%, and the copper band thickness is 0.1mm;
[0008] The three wires are twisted into a cable core in a clockwise direction, and a layer of sheath is extruded outside the cable core, the sheath is made of PVC material and plays a waterproof role.
[0009] A further aspect of this invention is that the linear armor layer consists of several low-carbon galvanized steel wires twisted together and densely distributed on the outer surface of the sheath using a twisting process. The diameter of a single steel wire is selected as 1.6 or 2.0 mm. A steel wire insulation layer is extruded onto the outer surface of each steel wire in the linear armor layer. The steel wire insulation layer is made of HDPE (high-density polyethylene). The linear armor layer with extruded HDPE material is tightly bonded to the sheath, which can overcome the loosening and "bulging" phenomenon of the linear steel wire armor.
[0010] The beneficial effects of this utility model are: it can meet the electrical performance requirements of submarine power transmission cables while reducing the outer diameter and weight of the cables, so that the laying of submarine cables in near-shore and shallow seas no longer depends on large construction vessels. The cable structure design is simple, with waterproof and tensile components. Compared with deep-sea cables, the unit weight is reduced by about 40%, which greatly reduces the difficulty of construction. The cable has environmental protection and seawater resistance, and can be used in both flowing near-shore environments and static beach direct burial environments. The operation is relatively simple and the construction cost is low. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Detailed Implementation
[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example
[0013] like Figure 1 As shown, a near-shore lightweight submarine cable includes a conductor, a sheath 6, a linear armor layer 7, and an armor insulation layer 8.
[0014] The aforementioned conductor consists of three wires, each comprising a conductor 1, an inner shielding layer 2, an insulation layer 3, an outer shielding layer 4, and a copper tape shielding layer 5. The conductor 1 is a wire conductor with a compression coefficient greater than or equal to 0.98. The inner shielding layer 2 is a polymer material extruded onto the conductor 1 to uniformly distribute the electric field. The insulation layer 3 is a water-tree resistant cross-linked polyethylene material to prevent water treeing and cable breakdown. The outer shielding layer 4 is extruded onto the insulation layer 3 and, like the inner shielding layer 2, serves to uniformly distribute the electric field. The copper tape shielding layer 5 is overlapped and wrapped around the outer shielding layer with an overlap rate of 15% and a copper tape thickness of 0.1 mm.
[0015] The three conductors are twisted clockwise to form the cable core, and a sheath 6 is extruded on the outside of the cable core. The sheath 6 is made of PVC and serves as a waterproof layer.
Claims
1. A lightweight submarine cable, characterized by The cable comprises a conductor, a sheath, a linear armor layer and an armored insulation layer. The conductor is a type line conductor with a compression coefficient greater than or equal to 0.98, the inner shielding layer is a high polymer material, which is extruded on the conductor to homogenize electric field, the insulation layer is a water tree resistant cross-linked polyethylene material, which prevents the cable from being broken down by water tree phenomenon, the outer shielding layer is extruded on the insulation layer, and has the same effect as the inner shielding layer, and the copper band shielding layer is overlapped and wrapped on the outer shielding layer with an overlapping rate of 15% and a copper band thickness of 0.1 mm. The three conductors are twisted into a cable core in a clockwise direction, and a layer of the sheath is extruded on the cable core, the sheath is made of PVC, and has a waterproof effect.
2. A lightweight submarine cable as claimed in claim 1, characterised in that The linear armor layer is formed by twisting a plurality of low-carbon galvanized steel wires through a reverse twisting process and densely arranging the steel wires on the outer surface of the sheath, the diameter of each steel wire is 1.6 or 2.0 mm, and a steel wire insulation layer is extruded on the outer surface of each steel wire of the linear armor layer, the steel wire insulation layer is made of HDPE, and the linear armor layer and the sheath are tightly combined.