CN201435261Y

CN201435261Y - Special coaxial cable

Info

Publication number: CN201435261Y
Application number: CN2009200441009U
Authority: CN
Inventors: 卢小青
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2010-03-31
Anticipated expiration: 2019-06-18

Abstract

The utility model relates to a special coaxial cable, which solves the technical problems that the technical function of the existing coaxial cable is poor, the structural design is unreasonable, themanufacturing cost is high and the like. The special coaxial cable comprises an inner conductor made of conducting materials. An insulation layer is coated on the inner conductor. The utility model ischaracterized in that the insulation layer is made of polyether ether ketone and is fixed on the outer wall of the inner conductor through injection molding, a shielding layer is coated on the external surface of the insulation layer, and the shielding layer is made of metal materials. Compared with the prior art, the special coaxial cable has the advantages that the design is reasonable, the structure is simple, the processing and the manufacturing are easy and the cost is low; the mechanical strength is high and the radiation resistance, the aging resistance, the fire retardation and the tightness are good; and the steps of the manufacturing process are simple, the implementation is easy and the product quality is effectively promoted.

Description

Special type coaxial cable

Technical field

The utility model relates to the cable technology field, especially relates to a kind of special type coaxial cable.

Background technology

Coaxial cord is general main to be made up of inner wire, insulating barrier, screen, also can be at the peripheral one deck oversheath that coats of screen.At present common coaxial cord is many to be insulating material with the polyethylene, according to the difference of insulation layer structure, solid polyethylene insulation coaxial cord, chemical blowing polyethylene insulation coaxial cord, vertical cellular type polyethylene insulation coaxial cord and physically foamed pe insulation coaxial cable have successively been experienced in the development of coaxial cord.Owing to advantages such as physical blowing polyethylene coaxial cord has environmentally safe, foam degrees height, flexibility is good, attenuation constant is little and transmission performance is stable obtain extensive use.Advantages such as this this coaxial cable has waterproof, and transmission performance is stable, and the life-span is long, but the insulating barrier of this cable has certain foam degrees, low, the not anti-irradiation of temperature index, flammable, more can not under nuclear environment, use.

Because it is more and more higher to the performance requirement of product, the coaxial cable that under nuclear environment, uses particularly, should satisfy the related electric performance requirement, also must guarantee reliable sealing performance, even under various accident conditionses (comprising dehydration, earthquake etc.), still can keep the integrality and the electrical continuity of containment pressure boundary.For this reason, people have carried out long-term exploration, have proposed various solutions.For example, Chinese patent literature discloses a kind of metal armouring rigid coaxial cable [application number: 200610152962.4], and it comprises inner wire, insulating medium layer, outer conductor and oversheath.Be characterized in: inner wire is the anaerobic copper cash, insulating medium layer is to be in series by the concavo-convex step column collets that match of head and the tail that many groups polysulfones, polyether sulfone, polyimides and polyether-ether-ketone engineering plastics are made, outer conductor is an oxygen-free copper pipe, oversheath that is above-mentioned engineering plastics.Somebody's utility model a kind of light-duty high temperature-resistant cable [application number: 200820149150.9], comprise one or more metallic conductor, insulating barrier and braid, described insulating barrier is by inside and outside two-layer the composition, described inner insulating layer is fluoroplastics, described insulating outer layer is a polyether-ether-ketone, two-layerly is extruded on the metallic conductor by the molten technology of squeezing of high temperature; Described metallic conductor is a high-quality anaerobic copper cash; Described anaerobic copper line surface has one deck silver coating, perhaps nickel coating; Described silver coating or nickel coating thickness are smaller or equal to 0.04MM; Described braid is aluminum-alloy wire, perhaps nickel wire.Light-duty high temperature-resistant cable of the present utility model, inside and outside dielectric layers is extruded on the metallic conductor by the molten technology of squeezing of high temperature, has made full use of the high-temperature stability of two kinds of materials, and the insulation proof voltage promotes, and has reduced cost again; And its braid is an aluminum-alloy wire, as jamproof screen under the high temperature service condition and light-duty protective layer, can alleviate cable weight, and is particularly great for using meaning on the space rocket.

Though such scheme improves the performance of coaxial cable to a certain extent, complex structure, the processing and manufacturing difficulty is big.And, in order to obtain more performance, improve impact strength etc., need to adopt the higher material of prices such as polyether-ether-ketone of modification, manufacturing cost is higher.

Summary of the invention

The purpose of this utility model is at the problems referred to above, provides a kind of reasonable in design, and favorable working performance is easy to processing and manufacturing, lower-cost special type coaxial cable.

For achieving the above object, the utility model has adopted following technical proposal: this special type coaxial cable, comprise the inner wire of making by electric conducting material, be coated with insulating barrier in the conductor, it is characterized in that, described insulating barrier is made by polyether-ether-ketone and is fixed on the outer wall of inner wire by injection molding, also is coated with screen outside insulating barrier, and this screen is made by metal material.

In above-mentioned special type coaxial cable, described insulating barrier comprises some concentric circles layers that successively are coated togather, and above-mentioned concentric circles layer links together by injection molding successively.

The thickness of the insulating barrier here can be determined according to reality is required.Because insulating barrier adopts sandwich construction, help reducing the difficulty of processing and manufacturing.In addition, the polyether-ether-ketone of sandwich construction can effectively improve the shock resistance of whole insulating barrier, and need not the modified polyetheretherketonefiber material that adopts cost higher, under the prerequisite of guaranteed performance, greatly reduces material cost.The polyether-ether-ketone of sandwich construction is arranged between screen and the inner wire with helping compressional deformation, has improved the sealing between screen and the inner wire effectively.In addition,, help being processed into thicker insulating barrier, produce the product of more specifications and models owing to adopt the insulating barrier of multilayer.

In above-mentioned special type coaxial cable, the thickness of described concentric circles layer equates.

As another kind of scheme, in above-mentioned special type coaxial cable, the thickness of described concentric circles layer is increasing or decreasing from the inside to the outside.

In above-mentioned special type coaxial cable, the outer wall of described screen is through polishing.

In above-mentioned special type coaxial cable, described inner wire is made by oxygen-free copper, and described screen is made by oxygen-free copper.

In above-mentioned special type coaxial cable, described screen periphery also is coated with the oversheath of being made by insulating material, and this oversheath is made by in polysulfones, polyether sulfone, polyimides or the polyether-ether-ketone any one.

Compared with prior art, the advantage of this special type coaxial cable is: 1, reasonable in design, simple in structure, be easy to processing and manufacturing, and cost is lower.2, mechanical strength height, anti-irradiation, ageing-resistant, fire-resistant, good airproof performance.3, the step of manufacturing process is simple, and is easy to implement, effectively promotes product quality.

Description of drawings

Fig. 1 is the sectional structure schematic diagram that the utility model provides.

Fig. 2 is the sectional structure schematic diagram that does not coat screen that the utility model provides.

Fig. 3 is the sectional structure schematic diagram of the insulating barrier that provides of the utility model.

Fig. 4 is the sectional structure schematic diagram that is coated with oversheath that the utility model provides.

Among the figure, inner wire 1, insulating barrier 2, concentric circles layer 21, screen 3, oversheath 4.

Embodiment

As shown in Figure 1, this special type coaxial cable comprises the inner wire of being made by electric conducting material 1, on inner wire 1, be coated with insulating barrier 2, insulating barrier 2 is made and is fixed on by injection molding the outer wall of inner wire 1 by polyether-ether-ketone, also be coated with screen 3 outside insulating barrier 2, this screen 3 is made by metal material.Inner wire 1 is made by oxygen-free copper, and screen 3 is made by oxygen-free copper.The outer wall of screen 3 is through polishing.

Shown in Fig. 1,2 and 3, insulating barrier 2 comprises some concentric circles layers 21 that successively are coated togather, and above-mentioned concentric circles layer 21 links together by injection molding successively.The thickness of concentric circles layer 21 equates.Certainly, also increasing or decreasing from the inside to the outside of the thickness of the concentric circles layer 21 here.

As shown in Figure 4, screen 3 peripheries also are coated with the oversheath of being made by insulating material 4, and this oversheath 4 is made by in polysulfones, polyether sulfone, polyimides or the polyether-ether-ketone any one.

Above-mentioned special type coaxial cable forms by the manufacturing of following special type coaxial cable manufacturing process: comprise the steps:

A, preheating inner wire 1: inner wire 1 is heated to 200 ℃-300 ℃;

B, coated insulation layer 2: determine the thickness of insulating barrier 2 according to required characteristic impedance, will make the polyether-ether-ketone heating of insulating barrier 2 and make it become liquid, then by injection molding at inner wire 1 outer wall coated insulation layer 2;

C, coat screen 3: the periphery at insulating barrier 2 coats the screen 3 that one deck is made by metal material, and with the outer wall of screen 3 through polishing.

Among the step B, at first at first concentric circles layer 21 of outer wall injection mo(u)lding of inner wire 1, remaining concentric circles layer 21 of injection mo(u)lding successively on above-mentioned concentric circles layer 21 reaches required thickness until insulating barrier 2 then.

Among the step C, after described screen 3 is placed in insulating barrier 2 peripheries, screen 3 is held on the insulating barrier 2 by draw technology; Also be coated with the oversheath of being made by insulating material 4 by injection molding in screen 3 peripheries, above-mentioned inner wire 1 and screen 3 are made by oxygen-free copper.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although this paper has used terms such as inner wire 1, insulating barrier 2, concentric circles layer 21, screen 3, oversheath 4 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.

Claims

1. special type coaxial cable, comprise the inner wire of making by electric conducting material (1), on inner wire (1), be coated with insulating barrier (2), it is characterized in that, described insulating barrier (2) is made and is fixed on by injection molding the outer wall of inner wire (1) by polyether-ether-ketone, also be coated with screen (3) outside insulating barrier (2), this screen (3) is made by metal material.

2. special type coaxial cable according to claim 1 is characterized in that, described insulating barrier (2) comprises some concentric circles layers (21) that successively are coated togather, and above-mentioned concentric circles layer (21) links together by injection molding successively.

3. special type coaxial cable according to claim 2 is characterized in that, the thickness of described concentric circles layer (21) equates.

4. special type coaxial cable according to claim 2 is characterized in that, the thickness of described concentric circles layer (21) is increasing or decreasing from the inside to the outside.

5. according to claim 1 or 2 or 3 or 4 described special type coaxial cables, it is characterized in that the outer wall of described screen (3) is through polishing.

6. according to claim 1 or 2 or 3 or 4 described special type coaxial cables, it is characterized in that described inner wire (1) is made by oxygen-free copper, described screen (3) is made by oxygen-free copper.

7. according to claim 1 or 2 or 3 or 4 described special type coaxial cables, it is characterized in that, the peripheral oversheath of being made by insulating material (4) that also is coated with of described screen (3), this oversheath (4) is made by in polysulfones, polyether sulfone, polyimides or the polyether-ether-ketone any one.