CN216353408U

CN216353408U - Composite direct current flexible cable

Info

Publication number: CN216353408U
Application number: CN202122714738.2U
Authority: CN
Inventors: 章尚义
Original assignee: Shanghai Nanyang Fujikura Cable Co ltd
Current assignee: Shanghai Nanyang Fujikura Cable Co ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-04-19
Anticipated expiration: 2031-11-08

Abstract

The utility model discloses a composite direct current flexible cable, which comprises: a plurality of conductors; coating each conductor to form a plurality of high-temperature-resistant insulating layers of the low-voltage wire core; the semi-conductive tight binding belt wraps the high-temperature-resistant insulating layer; an inner shield layer covering the semi-conductive tightening band; a high voltage insulating layer covering the inner shield layer; a shield semiconductive tape covering the high-voltage insulating layer; the shielding semi-conductive belt is wrapped by copper wire braided shielding; and the outer protective layer is used for coating the copper wire braided shield. And the low-voltage wire cores and the tin-plated bare copper wires are stranded into a cable and are positioned in the semi-conductive binding belt, and aramid fiber wires are filled in the gap inside the semi-conductive binding belt. The utility model has the characteristics of high current-carrying capacity, high pressure resistance, high mechanical strength, good flexibility and the like.

Description

Composite direct current flexible cable

Technical Field

The utility model relates to a high-voltage and low-voltage composite direct-current flexible cable.

Background

With the rapid development of modern society, the high-voltage cable is more and more widely used, and with some special requirements, in some high-voltage and large-length power transmission and distribution processes, the loss of the alternating-current cable in transmission current is large, and the loss can be effectively reduced by adopting the direct-current cable; and some for large-scale platform equipment power supply not only include high-pressure power supply but also include the low pressure power supply that navigation system, instrument control system used, have high-pressure frequency conversion system and the dual power consumption demand of low pressure frequency conversion system, adopt traditional distribution mode, can lead to high, low pressure cable in large quantity, lay the arrangement complicacy, consequently need one kind possess high current-carrying capacity, high withstand voltage simultaneously, high, the good high, low pressure composite cable of flexibility of mechanical strength.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the existing defects and provide a high-low voltage composite direct current flexible cable which has the characteristics of high current-carrying capacity, high pressure resistance, high mechanical strength, good flexibility and the like.

The technical scheme for realizing the purpose is as follows:

a composite dc flexible cable comprising:

a plurality of conductors;

coating each conductor to form a plurality of high-temperature-resistant insulating layers of the low-voltage wire core;

the semi-conductive tight binding belt wraps the high-temperature-resistant insulating layer;

an inner shield layer covering the semi-conductive tightening band;

a high voltage insulating layer covering the inner shield layer;

a shield semiconductive tape covering the high-voltage insulating layer;

the shielding semi-conductive belt is wrapped by copper wire braided shielding; and

the outer protective layer is used for coating the copper wire braided shield;

the low-voltage wire cores and the tin-plated bare copper wires are stranded into a cable and are positioned in the semi-conductive binding belt, and aramid fiber wires are filled in the gaps inside the semi-conductive binding belt.

Preferably, the number of the low-voltage wire cores and the number of the tinned bare copper wires are 3.

Preferably, the high-temperature-resistant insulating layer is made of an extruded fluorinated ethylene propylene material.

Preferably, the high-voltage insulating layer is made of ethylene propylene rubber.

Preferably, the outer protective layer is made of extruded tear-resistant thermoplastic elastomer material.

Preferably, the semi-conductive tightening strap is formed by a layer of semi-conductive nylon strap which is lapped and wound.

Preferably, the shielding semi-conductive belt is formed by lapping and wrapping a layer of semi-conductive nylon belt.

The utility model has the beneficial effects that: the high-voltage insulating layer is made of the ethylene propylene rubber with low Shore hardness and high electrical property, so that the cable has high current-carrying capacity and high-flexibility mechanical property; the shielding semi-conductive belt is wrapped by the copper wire braided shielding, so that the shielding semi-conductive belt is wrapped by the high-voltage insulating layer, the shielding semi-conductive belt has a high-efficiency shielding inhibition coefficient, the interference between a cable and the external environment can be avoided, and meanwhile, the tin-plated layer can effectively prevent the shielding copper wire from being oxidized; the outer protection layer is made of the extruded anti-tearing thermoplastic elastomer material, so that the flexibility and the anti-tearing performance of the cable are improved. Adopt and gather the transposition of ethylene propylene insulating core and bare wire mutually, aramid fiber closely fills and avoids the sinle silk aversion, plays the guard action to the cable core. The working temperature of the fluorinated ethylene propylene material can reach 250 ℃, and the strength of the single-stranded aramid fiber is not less than 300N, so that the cable has excellent temperature resistance and tensile property.

Drawings

FIG. 1 is a schematic of the present invention.

In the figure: 1. a conductor; 2. a high temperature resistant insulating layer; 3. tinning a bare copper wire; 4. aramid fiber filaments; 5. a semiconductive tightening strap; 6. an inner shield layer; 7. a high voltage insulating layer; 8. a shielding semi-conductive tape; 9. weaving and shielding copper wires; 10. an outer jacket.

Detailed Description

The technical scheme of the utility model is clearly and completely described in the following with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.

The utility model will be further explained with reference to the drawings.

As shown in fig. 1, a composite direct current flexible cable comprises a plurality of conductors 1, wherein the conductors 1 are tinned copper wires, are regularly bundled into strands in layers, and are then repeatedly twisted into cores in different directions in succession; a high-temperature-resistant insulating layer 2 covering the conductor 1; the high-temperature resistant insulating layer 2 is made of a material extruded with fluorinated ethylene propylene. And the semi-conductive binding belt 5 is coated with the high-temperature-resistant insulating layer 2, and the semi-conductive binding belt 5 is formed by a layer of semi-conductive nylon belt which is lapped and lapped in an overlapping mode. An inner shield layer 6 encasing the semiconductive tightening strap 5. And a high voltage insulating layer 7 covering the inner shield layer 6. The high-voltage insulating layer 7 is made of ethylene propylene rubber with low Shore hardness and high electrical property and is formed by extrusion through double-layer co-extrusion rubber sleeve equipment. A shield semiconducting tape 8 covering the high voltage insulating layer 7. The shielding semi-conductive belt 8 is formed by overlapping and wrapping a layer of semi-conductive nylon belt. The copper wire braided shield 9 covering the shielding semi-conducting belt 8 is characterized in that the copper wire braided shield 9 is a tinned copper wire braided shield, the braiding density is 95% or more, the high-efficiency shielding inhibition coefficient is achieved, interference between a cable and an external environment can be avoided, and meanwhile, the tinned layer can effectively prevent the shielding copper wire from being oxidized. The outer protective layer 10 of the shielding 9 is braided by wrapping copper wires, the outer protective layer 10 is made of extruded anti-tearing thermoplastic elastomer materials, the high flexibility and anti-tearing performance of the cable are enhanced due to the low hardness of the insulating materials and the high elasticity of the outer protective layer materials, and the current-carrying capacity and the pressure resistance of the cable are structurally improved. Each low-voltage wire core and many tinned bare copper wires 3 transposition stranding cable and lie in semiconduction tight ribbon 5, and the inside clearance packing of semiconduction tight ribbon 5 has aramid fiber silk 4. The cable core is prevented from being extruded out and breaking the cable core, so that the cable has excellent temperature resistance and the tensile capacity of the cable is improved. In this embodiment, the number of the low-voltage wire cores and the tinned bare copper wires 3 is 3.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite DC flexible cable, comprising:

a plurality of conductors (1);

coating each conductor (1) to form a plurality of high-temperature-resistant insulating layers (2) of the low-voltage wire core;

the semi-conductive tight-binding belt (5) coats the high-temperature-resistant insulating layer (2);

an inner shield layer (6) covering the semiconductive tightening band (5);

a high voltage insulation layer (7) coating the inner shield layer (6);

a shield semi-conductive tape (8) covering the high-voltage insulating layer (7);

a copper wire braided shield (9) covering the shield semi-conductive tape (8); and

an outer protective layer (10) covering the copper wire braided shield (9);

the low-voltage wire cores and the tinned bare copper wires (3) are stranded into a cable and are positioned in the semi-conductive binding belt (5), and aramid fiber yarns (4) are filled in the gaps inside the semi-conductive binding belt (5).

2. The composite direct current flexible cable according to claim 1, wherein the number of the low-voltage wire core and the tinned bare copper wire (3) is 3.

3. The composite direct current flexible cable according to claim 1, wherein the high temperature insulation layer (2) is made of an extruded fluorinated ethylene propylene material.

4. The composite direct current flexible cable according to claim 1, wherein the high voltage insulation layer (7) is made of ethylene propylene rubber.

5. The flexible direct current composite cable according to claim 1, wherein the outer sheath (10) is made of an extruded tear-resistant thermoplastic elastomer material.

6. A composite dc flexible cable according to claim 1, characterized in that the semiconducting binding tape (5) is made of a layer of semiconducting nylon tape wrapped in an overlapping manner.

7. A composite dc flexible cable according to claim 1, characterized in that the shielding semi-conductive tape (8) is formed by a layer of semi-conductive nylon tape lapped and wrapped.