CN100536035C

CN100536035C - Leaky coaxial cable of dual-steel wire enhanced internal conductor and its making method

Info

Publication number: CN100536035C
Application number: CNB2006101698942A
Authority: CN
Inventors: 简伟; 卫延; 方宏; 苏晓星; 王琳
Original assignee: Beijing Jiaotong University
Current assignee: Beijing Jiaotong University
Priority date: 2006-12-30
Filing date: 2006-12-30
Publication date: 2009-09-02
Anticipated expiration: 2026-12-30
Also published as: CN1996505A

Abstract

This invention relates to one leakage axis with double steel wire conductor and its process method, wherein, the conductor uses plastic tube with steel wires as mechanic supporter; the steel wires and the tube center lines are in same plane to ensure not to generate torque in the pavement process; the inner conductor presses physical bubble insulation layer; the layer is banded with each circle eradion tank copper band to form leakage axis outer conductor covered by outer plastic cover.

Description

Has leakage coaxial of double-steel-wire reinforced inner conductor and preparation method thereof

Technical field

The present invention relates to rail vehicle-ground communication technical field.Specifically a kind of being applied in has leakage coaxial of double-steel-wire reinforced inner conductor and preparation method thereof in high-speed railway car-ground communication.

Background technology

Its inner wire of leaky coaxial cable that the current track special bus-ground signal post uses has two kinds.A kind of is the metal copper pipe, and this need consume the high pure electrolytic copper of hundreds of kilograms, because the resource of copper is deficient day by day, the nearly rise in price several times of copper in two years so the inner wire that copper pipe is made costs an arm and a leg, must be improved.Another kind of inner wire is made up of copper-clad aluminum conductor, its tensile strength is lower, stretcher strain easily in construction, make the characteristic variation of whole leakage coaxial, leakage coaxial with above-mentioned two kinds of inner wires reverses in work progress easily, the radius that makes leakage coaxial causes the coupling loss between leakage coaxial and locomotive antenna to produce very big fluctuation not point-blank, and the error rate of car-ground communication is increased greatly.These two kinds of leakage coaxials all can not be made the composite fiber cable that contains fiber bundle in addition, can not make Optical Fiber Transmission and leak car-earth communication system that the cable radiation delivery is organically formed high stability.So press for the novel inner wire of developing leakage coaxial.

Summary of the invention

Purpose of the present invention just provides a kind of leakage coaxial with double-steel-wire reinforced inner conductor and preparation method thereof, and this is the leakage coaxial of a kind of function admirable, cheapness.

The present invention is achieved in that

Leakage coaxial with double-steel-wire reinforced inner conductor by plastics blank pipe (1), strengthen steel wire (2), contain two inner wire mechanical support (3), compound copper-plastics band (4), inner wire (5), physic foaming insulation layer (6), outer conductor (7) and sheaths (8) of strengthening steel wires and form.Be provided with two reinforcement steel wires (2) in the same plane in the both sides of plastics blank pipe (1), promptly form the mechanical support (3) of inner wire.The vertical mechanical support (3) that wraps in inner wire of compound copper-plastics band (4) goes up forms inner wire (5).Physic foaming insulation layer (6) is arranged on the inner wire (5), roll the vertical insulating barrier (6) that wraps in of the copper strips that radius is arranged and go up formation outer conductor (7).Outer conductor (7) is provided with sheath (8).

The manufacture method that the present invention has the leakage coaxial of double-steel-wire reinforced inner conductor comprises the steps:

1. the both sides of the plastics blank pipe (1) that is shaped at extrusion molding are provided with in the same plane two of the center line of plastics blank pipe (1) and strengthen steel wires (2), form the mechanical support (3) of inner wire.

2. the preparation width is greater than the compound copper-plastics band (4) of mechanical support (3) section girth of inner wire.

3. above-mentioned compound copper-plastics band is indulged wrapping on the mechanical support (3) of inner wire, and heating makes vertical overseam crack bonding in vertical packet shaping process, forms inner wire (5).

4. this novel inner wire size dimension is determined that by the leakage coaxial physical dimension physic foaming insulation layer (6) of respective thickness is arranged in the conductor.

5. will roll that the copper strips that radius is arranged is vertical to wrap on the physic foaming insulation layer (6), form leakage coaxial cable outer conductor (7).

6. go up extrusion molding sheath (8) at leakage coaxial cable outer conductor (7), just made leakage coaxial with double-steel-wire reinforced inner conductor.

The invention has the advantages that the inner wire copper consumption reduces significantly, tensile strength increases considerably, and can guarantee that radius aims at the antenna of locomotive forever, and coupling performance is reliable and stable, has very big economic benefit.

Description of drawings

Fig. 1 comprises two leakage coaxial inner wire supporting body structure schematic diagrames of strengthening steel wire.

Fig. 2 is a leakage coaxial inner wire structural representation.

Fig. 3 is a leakage coaxial physical foam insulation body structure schematic diagram.

Fig. 4 is the leakage coaxial structural representation with double-steel-wire reinforced inner conductor.

Embodiment

1 needs two of parallel addings to strengthen steel wire (2) in extrusion plastic blank pipe (1) process, and the blank pipe of being extruded will be strengthened steel wire and be included in the tube wall, form the mechanical support (3) of inner wire.Wherein, two steel wires and the plastics air traffic control centre line plane that should coexist.As shown in Figure 1.

2 mechanical support with above-mentioned inner wire (3) enter the vertical chartered plane of Copper Foil, and the width of the compound copper-plastics band (4) about vertical bag thickness 0.05mm is than the Zhou Changda 3～5mm of plastic outer tube.Need add hot blast behind the vertical packet shaping, will indulge copper-clad paper tinsel composite band overlap and be bonded into integral body, form the plastic tube of vertical copper-clad paper tinsel composite band, and with this leakage coaxial inner wire (5) as new structure.As shown in Figure 2.

The 3 leakage coaxial inner wires (5) with vertical copper-clad paper tinsel composite band enter the physical blowing plastic extruding machine immediately, are extruded into the cellular polyethylene insulation layer (6) of corresponding size.As shown in Figure 3.

4 enter outer conductor again with above-mentioned assembly with cellular polyethylene insulation layer indulges chartered plane, will roll the vertical outer conductor (7) that is bundled into of the copper strips that various radius are arranged.The black polyethylene sheath (8) that extrusion molding 2.5mm is thick on outer conductor, this has just made the leakage coaxial with double-steel-wire reinforced inner conductor.As shown in Figure 4.

Claims

1. the manufacture method with leakage coaxial of double-steel-wire reinforced inner conductor is characterized in that it comprises the steps:

1) both sides of the plastics blank pipe (1) that is shaped at extrusion molding are provided with in the same plane two of the center line of plastics blank pipe (1) and strengthen steel wires (2), form the mechanical support (3) of inner wire;

2) the preparation width is greater than the compound copper-plastics band (4) of mechanical support (3) section girth of inner wire;

3) wrap on the mechanical support (3) of inner wire above-mentioned compound copper-plastics band is vertical, and heating makes vertical overseam crack bonding in vertical packet shaping process, formation inner wire (5);

4) this novel inner wire size dimension is determined by the leakage coaxial physical dimension, and the physic foaming insulation layer (6) of respective thickness is arranged in the conductor;

5) will roll that the copper strips that radius is arranged is vertical to wrap on the physic foaming insulation layer (6), form leakage coaxial cable outer conductor (7);

6) go up extrusion molding sheath (8) at leakage coaxial cable outer conductor (7), just made leakage coaxial with double-steel-wire reinforced inner conductor.