Composite high-temperature-resistant power cable

Abstract

The utility model discloses a kind of composite high-temperature-resistant power cable, it is related to cable technical field, for the background technology proposed without setting fixed structure in multiple groups of wire core outside, cable is extruded by outside, copper core is easily deformed under the action of extrusion force, the problem of low practicality, present and propose the following scheme, including several wire cores, wire core outside is equipped with several retaining rings, retaining ring outside is equipped with armored layer, armored layer outside is equipped with aerogel felt layer, aerogel felt layer outside is equipped with fluorinated ethylene propylene copolymer composite layer, wire core includes several cable copper cores and insulating outer layer, several cable copper cores are twisted, cable copper core is covered with mica tape layer outside, mica tape layer is covered with insulating outer layer outside, retaining ring outer wall is opened with several installation ports, several wire cores are respectively sleeved in several installation ports. The utility model can fix and protect wire core, prevent copper core from deforming when being extruded, improve practicality.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a composite high-temperature resistant power cable. Background Technology

[0002] Power cables are cables used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply for industrial and mining enterprises, and underwater power transmission lines across rivers and seas.

[0003] A search revealed a Chinese patent (application number "201220215754.5") disclosing "a composite insulated high-temperature resistant power cable." This high-temperature resistant power cable includes a conductor made of oxygen-free copper rod drawn into copper wire, with a polytetrafluoroethylene (PTFE) insulation layer extruded onto the conductor, and a polyvinyl chloride (PVC) insulation composite layer outside the insulation layer. Multiple insulated cores are connected by a filler rope twisted into a cable core. The cable core is sequentially arranged from the inside out with a wrapping layer and a low-smoke halogen-free flame-retardant polyolefin sheath layer. However, during use, this high-temperature resistant power cable lacks a fixing structure on the outside of the multiple cores. When the cable is subjected to external pressure, the copper core is prone to deformation under the pressure, resulting in low practicality. Utility Model Content

[0004] This utility model provides a composite high-temperature resistant power cable, which solves the problem proposed in the prior art that the high-temperature resistant power cable does not have a fixing structure on the outside of multiple sets of conductors during use, and the copper core is prone to deformation under the pressure of external compression when the cable is subjected to external compression, resulting in low practicality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A composite high-temperature resistant power cable includes several cores, several retaining rings are provided outside the cores, an armor layer is provided outside the retaining rings, an aerogel felt layer is provided outside the armor layer, and a fluorinated ethylene propylene copolymer composite layer is provided outside the aerogel felt layer.

[0006] Preferably, the wire core includes a plurality of cable copper cores and an insulating outer layer, the plurality of cable copper cores are twisted together, and the cable copper cores are covered with a mica tape layer, and the mica tape layer is covered with an insulating outer layer.

[0007] Preferably, the outer wall of the retaining ring has a plurality of mounting holes, and a plurality of wire cores are respectively fitted into the plurality of mounting holes, and the outer wall of the retaining ring has a plurality of buffer holes.

[0008] Preferably, the armor layer covers the outer wall of several retaining rings, and the space formed by the armor layer and two adjacent retaining rings is filled with cable filler.

[0009] The above solution uses multiple retaining rings to fix multiple wire cores, and the filler in the space formed by the armor layer and multiple retaining rings also fixes the wire cores. When the cable is subjected to external pressure, the retaining rings buffer the pressure and prevent the copper core from deforming.

[0010] Preferably, the aerogel felt layer is wrapped around the outer wall of the armor layer, and the aerogel felt layer is bonded to the outer wall of the armor layer with heat-resistant adhesive.

[0011] Preferably, the fluorinated ethylene propylene copolymer composite layer is coated on the outer wall of the aerogel felt layer, and a heat-insulating coating is sprayed on the outer wall of the fluorinated ethylene propylene copolymer composite layer.

[0012] The above solution uses an aerogel felt layer to isolate the cable from the temperature in the external environment, the flame retardant effect of the fluorinated ethylene propylene copolymer composite layer itself to improve the flame retardancy of the cable, and a heat insulation coating to insulate the fluorinated ethylene propylene copolymer composite layer, thereby improving the cable's high-temperature resistance.

[0013] The beneficial effects of this utility model are as follows: Multiple retaining rings secure multiple wire cores, while filler within the space formed by the armor layer and multiple retaining rings further secures the wire cores. When the cable is subjected to external pressure, the retaining rings buffer the pressure, preventing deformation of the copper cores. This design secures and protects the wire cores, preventing deformation when subjected to pressure and improving practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall main structure of a composite high-temperature resistant power cable proposed in this utility model.

[0015] Figure 2 This is a schematic diagram of the main structure of the core of a composite high-temperature resistant power cable proposed in this utility model.

[0016] Figure 3 This is a schematic diagram of the retaining ring structure of a composite high-temperature resistant power cable proposed in this utility model.

[0017] Figure 4 The present utility model proposes Figure 1 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Core wire; 101. Copper core of cable; 102. Insulation outer layer; 2. Retaining ring; 21. Mounting port; 22. Buffer port; 3. Armor layer; 4. Aerogel felt layer; 5. Fluorinated ethylene propylene copolymer composite layer; 6. Heat insulation coating. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example 1, referring to Figure 1-3 A composite high-temperature resistant power cable includes several conductors 1, each conductor 1 comprising several copper cable cores 101 and an insulating outer layer 102. The copper cable cores 101 are twisted together, and each copper cable core 101 is covered with a mica tape layer. The mica tape layer is covered with the insulating outer layer 102. Several retaining rings 2 are provided outside the conductors 1. Several mounting openings 21 are opened on the outer wall of the retaining rings 2. The conductors 1 are respectively fitted into the mounting openings 21. Several buffer openings 22 are opened on the outer wall of the retaining rings 2. An armor layer 3 is provided outside the retaining rings 2. The armor layer 3 covers the outer wall of the retaining rings 2. The space formed by the armor layer 3 and two adjacent retaining rings 2 is filled with cable filler.

[0021] Example 2, refer to Figure 1 and Figure 4 A composite high-temperature resistant power cable further includes an aerogel felt layer 4 on the outside of the armor layer 3, the aerogel felt layer 4 being wrapped around the outer wall of the armor layer 3 and bonded to the outer wall of the armor layer 3 by heat-resistant adhesive, a fluorinated ethylene propylene copolymer composite layer 5 on the outside of the aerogel felt layer 4, the fluorinated ethylene propylene copolymer composite layer 5 covering the outer wall of the aerogel felt layer 4, and a heat-insulating coating 6 being sprayed on the outer wall of the fluorinated ethylene propylene copolymer composite layer 5.

[0022] Working principle: Multiple retaining rings 2 fix multiple wire cores, while the filler in the space formed by the armor layer 3 and multiple retaining rings 2 fixes the wire core 1. When the cable is subjected to external compression, the retaining rings 2 buffer the compression force to prevent the copper core from deforming. The aerogel felt layer 4 isolates the temperature in the external environment. The flame retardant effect of the fluorinated ethylene propylene copolymer composite layer 5 improves the flame retardancy of the cable. The heat insulation coating 6 insulates the fluorinated ethylene propylene copolymer composite layer 5 and improves the high temperature resistance of the cable.

[0023] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A composite high-temperature resistant power cable, comprising a plurality of conductors (1), characterized in that, The core (1) is provided with a plurality of retaining rings (2) on the outside, and the retaining rings (2) are provided with an armor layer (3) on the outside; The armor layer (3) is provided with an aerogel felt layer (4) on the outside, and the aerogel felt layer (4) is provided with a fluorinated ethylene propylene copolymer composite layer (5) on the outside.

2. The composite high-temperature resistant power cable according to claim 1, characterized in that, The wire core (1) includes several cable copper cores (101) and an insulating outer layer (102). The several cable copper cores (101) are twisted together, and the cable copper cores (101) are covered with a mica tape layer, and the mica tape layer is covered with an insulating outer layer (102).

3. The composite high-temperature resistant power cable according to claim 1, characterized in that, The retaining ring (2) has several mounting holes (21) on its outer wall, and several wire cores (1) are respectively fitted into several mounting holes (21). The retaining ring (2) has several buffer holes (22) on its outer wall.

4. The composite high-temperature resistant power cable according to claim 1, characterized in that, The armor layer (3) covers the outer wall of several retaining rings (2), and the space formed by the armor layer (3) and two adjacent retaining rings (2) is filled with cable filler.

5. A composite high-temperature resistant power cable according to claim 1, characterized in that, The aerogel felt layer (4) is wrapped around the outer wall of the armor layer (3), and the aerogel felt layer (4) is bonded to the outer wall of the armor layer (3) by heat-resistant adhesive.

6. The composite high-temperature resistant power cable according to claim 1, characterized in that, The fluorinated ethylene propylene copolymer composite layer (5) is wrapped around the outer wall of the aerogel felt layer (4), and a heat insulation coating (6) is sprayed on the outer wall of the fluorinated ethylene propylene copolymer composite layer (5).

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