CN104577282A

CN104577282A - Grid type leaky coaxial cable with parallel outer wires and manufacturing method of grid type leaky coaxial cable

Info

Publication number: CN104577282A
Application number: CN201510009680.8A
Authority: CN
Inventors: 孙增军; 姚昌雷; 陈红鸽; 范建明
Original assignee: Jiangsu Jiahuiguang Pharmaceutical Technology Co Ltd
Current assignee: Jiangsu Jiahuiguang Pharmaceutical Technology Co Ltd
Priority date: 2015-01-09
Filing date: 2015-01-09
Publication date: 2015-04-29

Abstract

The invention relates to a cable and a manufacturing method of the cable, in particular to a grid type leaky coaxial cable with parallel outer wires and a manufacturing method of the grid type leaky coaxial cable. The grid type leaky coaxial cable with the parallel outer wires sequentially comprises an inner conductor, an insulator and a sheath from inside to outside and further comprises an outer wire fixing layer, no less than three outer wires and sub-lines. The outer wire fixing layer is arranged between the insulator and the sheath, the outer wires are annularly and uniformly distributed in the outer wire fixing layer, and the sub-lines are arranged in the insulator and symmetrically distributed on the two sides of the inner conductor. The sub-lines are steel wire ropes and the outer wires are aluminum wires. Copper consumption is reduced, and the grid type leaky coaxial cable with the parallel outer wires is simple in structure, low in manufacturing cost, high in tensile strength, stable in radiation, good in signal quality and resistant to interference.

Description

Parallel outer conductor grid-type leaks cable and preparation method thereof

Technical field

The present invention relates to a kind of cable and preparation method thereof, especially parallel outer conductor grid-type leaks cable and preparation method thereof.

Background technology

At present carrying out communicating in Mountain Tunnels and the occasion such as subway, mine, main what adopt is leaky coaxial cable.Leaky coaxial cable is a kind of radio-specific transmission " medium " of vast of heaven line, and forming the radio transmission channel of higher transmission quality, is the key component of radio communications system; The key of its design is the calculating of coupling loss, and the form of fluting then depends on the frequency range of used radio wave, but the calculating of current list of references to this parameter often adopts numerical algorithm, comparatively not accurate analytic solutions.In addition, leaky coaxial cable requires higher to manufacturing technology, and also will use a large amount of copper, cost is higher.Also have leaky coaxial cable to be conductor openings outside, once the standard that do not meet is difficult to make up after making, and during the transmission line of this cable as device port signal, easily suffer the electromagnetic interference of other equipment.

Summary of the invention

For solving the problem, the invention provides one and manufacturing simply, use wave band wide, jamproof parallel outer conductor grid-type leakage cable and preparation method thereof, concrete technical scheme is:

Parallel outer conductor grid-type leaks cable, is followed successively by inner wire, insulator, sheath from the inside to the outside; Also comprise outer conductor fixed bed, outer conductor and by-pass;

Described outer conductor fixed bed is located between insulator and sheath;

Described outer conductor annular is distributed in outer conductor fixed bed, and outer conductor is no less than three;

Described by-pass is established in the insulator, and is symmetrically distributed in the both sides of inner wire.

Described by-pass is steel wire rope.

Described outer conductor is aluminum conductor.

Parallel outer conductor grid-type leaks the preparation method of cable, comprises the following steps:

(1) fixed by mould at inner wire and by-pass, coated insulation body;

(2) outer conductor is fixed in outer conductor fixed bed, then is coated on outside insulator by outer conductor fixed bed;

(3) outside outer conductor fixed bed, coated sheath is carried out.

Outer conductor annular is distributed in outer conductor fixed bed, and outer conductor and inside conductor define parallel wire, and radiation signal is strong, and stable radiation is anti-interference.

Common leaky coaxial cable belongs to the transmission of single line ripple, and namely by solid conductor radiation, around it, set up alternating electromagnetic field, and complete diffusion by environment, its loss is very big.

Parallel outer conductor grid-type is leaked cable and is adopted multi-thread ripple to transmit, and namely by multiple conducting wires radiation, around it, sets up alternating electromagnetic field.Although multi-thread ripple transmission is also also set up alternating electromagnetic field around conductor, very weak induced current can only be caused to environment, so loss is very little.Simultaneously multi-thread ripple transmission continuous positive energy exchange in transmitting procedure, obtains when can realize the leakage field of radio communication along wire radial direction, maintains again the performance of radio signal along wire longitudinal direction low-loss transmission.

The outer conductor that parallel outer conductor grid-type leaks cable employing is the aluminum conductor that annular is distributed in outer conductor fixed bed, and inner wire adopts hollow copper pipe, saves the consumption of copper, reduces material cost.

Parallel outer conductor grid-type leaks cable not to be needed at outer conductor upper punch slotted eye, is suitable for wave band wide, and structure is simple, low cost of manufacture.

Leak in parallel outer conductor grid-type in the insulator of cable and with the addition of two steel wire ropes, enhance the tensile strength of whole leakage cable, decrease the diameter of inner wire, save material, reduce cost.

Parallel outer conductor grid-type provided by the invention leaks the use that cable decreases copper, and structure is simple, and low cost of manufacture, tensile strength is high, stable radiation, and signal quality is good, anti-interference.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Embodiment

Existing accompanying drawings the specific embodiment of the present invention, as shown in Figure 1:

Parallel outer conductor grid-type leaks cable, is followed successively by inner wire 1, insulator 2, sheath 5 from the inside to the outside; Also comprise outer conductor fixed bed 3, outer conductor 4 and by-pass 6;

Described outer conductor fixed bed 3 is located between insulator 2 and sheath 5;

Described outer conductor 4 annular is distributed in outer conductor fixed bed 3, and outer conductor 4 is no less than three;

Described by-pass 6 is located in insulator 2, and is symmetrically distributed in the both sides of inner wire 1.

Described by-pass 6 is steel wire rope.

Described outer conductor 4 is aluminum conductor.

(1) fixed by mould at inner wire 1 and by-pass 6, coated insulation body 2;

(2) outer conductor 4 is fixed in outer conductor fixed bed 3, then is coated on outside insulator 2 by outer conductor fixed bed 3;

(3) outside outer conductor fixed bed 3, coated sheath 5 is carried out.

Claims

1. parallel outer conductor grid-type leaks cable, is followed successively by inner wire (1), insulator (2), sheath (5) from the inside to the outside; It is characterized in that: also comprise outer conductor fixed bed (3), outer conductor (4) and by-pass (6);

Described outer conductor fixed bed (3) is located between insulator (2) and sheath (5);

Described outer conductor (4) annular is distributed in outer conductor fixed bed (3), and outer conductor (4) is no less than three;

Described by-pass (6) is located in insulator (2), and is symmetrically distributed in the both sides of inner wire (1).

2. parallel outer conductor grid-type according to claim 1 leaks cable, it is characterized in that: described by-pass (6) is steel wire rope.

3. parallel outer conductor grid-type according to claim 1 leaks cable, it is characterized in that: described outer conductor (4) is aluminum conductor.

4. the parallel outer conductor grid-type according to any one of Claim 1-3 leaks cable, it is characterized in that: parallel outer conductor grid-type leaks the preparation method of cable, comprises the following steps:

(1) fixed by mould at inner wire (1) and by-pass (6), coated insulation body (2);

(2) outer conductor (4) is fixed in outer conductor fixed bed (3), then outer conductor fixed bed (3) is coated on insulator (2) outward;

(3) outside outer conductor fixed bed (3), coated sheath (5) is carried out.