CN211150176U

CN211150176U - Leakage coaxial cable with ice melting function

Info

Publication number: CN211150176U
Application number: CN202020114307.5U
Authority: CN
Inventors: 刘俊超; 吕秀武; 张云霄; 梁晓婷; 朱增乐; 买利伟
Original assignee: Jiaozuo Railway Cable Co Ltd
Current assignee: Jiaozuo Railway Cable Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-07-31
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a leakage coaxial cable with ice-melt function, from interior to exterior include inner conductor, insulating layer, outer conductor, around covering and oversheath in proper order, outer conductor and around being equipped with carbon fiber heating wire between the covering, the last leakage slotted hole that has seted up along the axial of outer conductor, carbon fiber heating wire locates outer conductor periphery and sets up in the outer conductor both sides with the leakage slotted hole relatively, fiber heating wire includes two or three heating cable cores that constitute by carbon fiber, heating cable core distributes along outer circumference of outer conductor and is opposite with the leakage slotted hole position, every heating cable core all coats outward and has the wire insulating layer; the utility model discloses can effectively melt cable surface icing, guarantee that leakage coaxial cable is normal in the severe cold environment, stable and reliable operation, and have advantages such as simple structure, convenient to use, with low costs and safe and reliable concurrently.

Description

Leakage coaxial cable with ice melting function

Technical Field

The utility model relates to a communication leakage coaxial cable ice-melt technical field especially relates to a leakage coaxial cable with ice-melt function.

Background

With the rapid development of railway wireless communication technology, in order to solve the problem that signals of a traditional antenna cannot be effectively covered in a special area, leaky coaxial cables (leaky coaxial cables) are adopted to replace the traditional antenna in a large number in railway sections such as mountainous tunnels and elevated buildings, and the problem of unstable signals is effectively solved. However, due to the influence of ice, snow and freezing rain, the leaky cable can be covered with ice, and the excessive ice can cause huge load to the leaky cable, so that the signal covering effect of the leaky cable is influenced, the leaky cable can be broken, and the driving safety is influenced. In recent years, various deicing methods are proposed by some colleges and universities, scientific research institutions and power enterprises at home and abroad aiming at the problem of ice coating of high-voltage transmission lines in low-temperature freezing rain weather, but no effective deicing method specially aiming at leaky cables exists. The existing method for solving the problem of icing hanging of the leaky cable mostly adopts manual deicing or mechanical deicing operation or adds a metal heating wire into the leaky cable, the former is time-consuming and labor-consuming, difficult to operate and low in safety, a time window is required to be opened, the personal safety and the driving safety are greatly influenced, and the latter is low in heat energy conversion efficiency and poor in ice melting effect because the metal heating wire has the defects of low mechanical strength, short service life, heavy weight and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a leakage coaxial cable with ice-melt function can effectively melt cable surface icing, guarantees that leakage coaxial cable is normal in severe cold environment, stable and reliable operation, and has advantages such as simple structure, convenient to use, with low costs and safe and reliable concurrently.

The utility model adopts the technical proposal that:

a leaky coaxial cable with ice melting function comprises an inner conductor, an insulating layer, an outer conductor, a wrapping layer and an outer sheath from inside to outside in sequence, wherein a carbon fiber heating wire is arranged between the outer conductor and the wrapping layer; the outer conductor is provided with a leakage slot along the axial direction, and the carbon fiber heating wires are arranged on the periphery of the outer conductor and are arranged on two sides of the outer conductor opposite to the leakage slot.

Furthermore, the carbon fiber heating wire comprises two or three heating cable cores formed by carbon fibers, the heating cable cores are distributed along the outer circumference of the outer conductor and opposite to the position of the leakage slotted hole, and a wire insulating layer is coated outside each heating cable core.

Further, the wire insulating layer is made of a high-thermal-conductivity silicon rubber composite insulating material.

Furthermore, the inner conductor is made of a smooth copper pipe or a hollow spiral copper pipe.

Furthermore, the insulating layer is made of skin-foam-skin three-layer physically foamed polyethylene formed by foaming and crosslinking carbon dioxide physically foamed polyethylene.

Furthermore, the outer conductor is formed by longitudinally wrapping a point-type embossing or cross-embossing thin copper strip.

Further, the outer sheath is formed by extruding and wrapping low-smoke halogen-free flame-retardant polyolefin sheath materials.

The utility model discloses following beneficial effect has:

(1) the carbon fiber heating wire is arranged on one side, opposite to the leakage slotted hole, outside the outer conductor, and is wrapped and fixed outside the outer conductor by utilizing the wrapping layer, the ice melting performance of the leakage coaxial cable is effectively improved by utilizing the advantages of high mechanical strength, long service life, light weight, stable resistance value and uniform heating of the carbon fiber, the reliability of signal transmission of the leakage cable and the driving safety are indirectly guaranteed, meanwhile, the electromagnetic radiation of the carbon fiber heating cable is small, the influence on the signal coverage of the leakage cable is extremely small, and the electromagnetic radiation of the metal cable can influence the signal transmission of the leakage cable, so that compared with the traditional ice melting mode of the metal heating wire, the utility model effectively guarantees the stability and the reliability of the signal transmission of the leakage cable;

(2) the heating cable cores are distributed along the outer circumference of the outer conductor and are arranged opposite to the positions of the leakage slotted holes, so that the uniformity of heating on the surface of the leakage cable is ensured, the ice melting effect is improved, the influence on the signal coverage of the leakage cable is further reduced, and the driving safety of a train is indirectly ensured;

(3) the wire insulating layer is made of the high-heat-conduction silicon rubber composite insulating material, so that the heat conductivity, heat resistance and insulativity of the carbon fiber heating wire are effectively guaranteed.

Drawings

Fig. 1 is a schematic view of a layer-by-layer peeling structure of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of the present invention.

Description of reference numerals:

1. an inner conductor; 2. an insulating layer; 3. an outer conductor; 301. a leaky slot; 4. wrapping a covering; 5. an outer sheath; 6. a carbon fiber heating wire; 601. a heating cable core; 602. and a wire insulation layer.

Detailed Description

As shown in fig. 1, the utility model comprises an inner conductor 1, an insulating layer 2, an outer conductor 3, a wrapping layer 4 and an outer sheath 5 in sequence from inside to outside, and a carbon fiber heating wire 6 is arranged between the outer conductor 3 and the wrapping layer 4; a leakage slot hole 301 is axially arranged on the outer conductor 3, and the carbon fiber heating wire 6 is arranged on the periphery of the outer conductor 3 and is arranged on two sides of the outer conductor 3 opposite to the leakage slot hole 301.

In order to better understand the present invention, the technical solution of the present invention is further explained below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model discloses from interior to exterior include inner conductor 1, insulating layer 2, outer conductor 3 in proper order, around covering 4 and oversheath 5, outer conductor 3 and around being equipped with carbon fiber heating wire 6 between covering 4, carbon fiber heating wire 6 locates outer conductor 3 periphery and sets up in outer conductor 3 both sides relatively with leakage slotted hole 301.

The inner conductor 1 is made of a smooth copper pipe or an embossed copper pipe, and preferably a hollow spiral copper pipe.

The inner conductor 1 is extruded to form the polyethylene foamed insulating layer 2, preferably, the skin-foam-skin three-layer physically foamed polyethylene formed by foaming and crosslinking carbon dioxide physically foamed polyethylene is adopted, and the carbon dioxide foaming technology is adopted, so that the foaming degree reaches over 80 percent, the energy loss in the signal transmission process is reduced, and the electric transmission performance of the cable is improved.

The outer conductor 3 is formed by longitudinally wrapping a point-type embossing or transverse embossing thin copper strip, leakage slotted holes 301 are periodically formed in the outer conductor 3 along the axial direction, and the sizes of the leakage slotted holes 301 are designed according to the use requirements of different working frequencies of a communication system.

The carbon fiber heating wire 6 is arranged at the periphery of the outer conductor 3 and opposite to the position where the leakage slot 301 is opened, namely, the leakage slot 301 is opened at one side of the outer conductor 3, and the carbon fiber heating wire 6 is arranged at the other side of the outer conductor 3 opposite to the leakage slot 301. The carbon fiber heating wire 6 comprises two or three heating cable cores 601 formed by carbon fibers, is an energy-saving type electric heating wire, has very high mechanical strength and extremely long service life compared with a metal heating wire, has light weight, stable resistance value and uniform heating, and simultaneously can not cause electromagnetic interference to the transmission of leakage cable signals because the material is nonmetal.

The heating cable core 601 is distributed along the outer circumference of the outer conductor 3, and the arc formed by the heating cable core 601 is opposite to the arc formed by the leakage slot hole 301 by 180 degrees; each heating cable core 601 is coated with a wire insulating layer 602, and the wire insulating layer 602 is made of a high-thermal-conductivity silicone rubber composite insulating material, so that the carbon fiber heating wire 6 has excellent thermal conductivity, heat resistance and insulation properties.

The wrapping layer 4 is wrapped by non-woven fabrics, and the carbon fiber heating wire 6 is wrapped and fixed at the position, opposite to the leakage slotted hole 301180 degrees, outside the outer conductor 3.

The outer sheath 5 is formed by extruding low-smoke halogen-free flame-retardant polyolefin sheath materials.

When the utility model discloses icing phenomenon appears on the surface, can be with 6 switch-on power supplies of built-in carbon fiber heating wire, through carbon fiber with electric energy conversion for heat energy, will leak the ice on cable surface and melt rapidly to effectual hourglass cable of having guaranteed normally operated in severe cold area or winter, simple structure, convenient to use, low cost, safe and reliable.

The carbon fiber in the carbon fiber heating wire 6 is a black body material, and the heating principle is that voltage is applied to two ends of the carbon fiber, and far infrared carbon fiber radiates energy outwards in a far infrared mode. The electrothermal conversion efficiency is improved by 20 percent compared with the metal heating, the temperature is rapidly increased, the electrothermal conversion efficiency reaches more than 98 percent, and the electricity and the energy are saved. The carbon fiber heating wire 6 adopts a circuit structure with two or three parallel connection, so that the current of each heating cable core 601 is not more than 0.8A, the current per se is very low, no contact inductance exists even if a human body is in direct contact with the heating wire, and the current of each point of the metal cable is consistent to be dozens of times of the overcurrent of the carbon fiber heating cable. Owing to adopt non-metallic heat-generating body, carbon fiber heating cable electromagnetic radiation is little, can not exert an influence to the signal cover of leaking the cable, compares in having the electromagnetic radiation's that influences the transmission of leaking cable signal metal cable, the utility model discloses all have good performance in signal transmission's stability, reliability.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or equivalent replaced by some or all of the technical features, and the modifications or the replacements may 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 leaky coaxial cable with ice melting function is characterized in that: the carbon fiber heating cable sequentially comprises an inner conductor, an insulating layer, an outer conductor, a wrapping layer and an outer sheath from inside to outside, wherein a carbon fiber heating wire is arranged between the outer conductor and the wrapping layer; the outer conductor is provided with a leakage slot along the axial direction, and the carbon fiber heating wires are arranged on the periphery of the outer conductor and are arranged on two sides of the outer conductor opposite to the leakage slot.

2. The leaky coaxial cable with ice-melting function as claimed in claim 1, wherein: the carbon fiber heating wire comprises two or three heating cable cores formed by carbon fibers, the heating cable cores are distributed along the outer circumference of the outer conductor and opposite to the position of the leakage slotted hole, and a wire insulating layer is coated outside each heating cable core.

3. The leaky coaxial cable with ice-melting function as claimed in claim 2, wherein: the wire insulating layer is made of a high-thermal-conductivity silicon rubber composite insulating material.

4. The leaky coaxial cable with ice-melting function as claimed in claim 1, wherein: the inner conductor is a smooth copper pipe or a hollow spiral copper pipe.

5. The leaky coaxial cable with ice-melting function as claimed in claim 1, wherein: the insulating layer is made of skin-foam-skin three-layer physically foamed polyethylene formed by foaming and crosslinking carbon dioxide physically foamed polyethylene.

6. The leaky coaxial cable with ice-melting function as claimed in claim 1, wherein: the outer conductor is formed by longitudinally wrapping a point-type embossing or transverse embossing thin copper strip.

7. The leaky coaxial cable with ice-melting function as claimed in claim 1, wherein: the outer sheath is formed by extruding low-smoke halogen-free flame-retardant polyolefin sheath materials.