CN203070823U - Coaxial cable - Google Patents
Coaxial cable Download PDFInfo
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- CN203070823U CN203070823U CN 201320035933 CN201320035933U CN203070823U CN 203070823 U CN203070823 U CN 203070823U CN 201320035933 CN201320035933 CN 201320035933 CN 201320035933 U CN201320035933 U CN 201320035933U CN 203070823 U CN203070823 U CN 203070823U
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- coaxial cable
- outer conductor
- insulating layer
- sheath
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Abstract
The embodiment of the utility model discloses a coaxial cable, comprising an internal conductor, an insulating layer, an outer conductor and a sheath. The internal conductor is positioned at the innermost layer of the coaxial cable, and the sheath is positioned at the outermost layer. The insulating layer is positioned between the internal conductor and the outer conductor and is a matrix type air insulating layer. According to the abovementioned embodiment, the matrix type air insulating layer adopted as the insulating layer is not only flame-retardant but also low in smoke concentration in the burning, is characterized by preventing the fire hazard from spreading between floors, has excellent flame-retardant properties, and can meet pressurization-grade requirements of flame-retardant cables.
Description
Technical field
The utility model relates to the ICT (information and communication technology) field, particularly a kind of coaxial cable.
Background technology
Along with the prosperity of ICT (information and communication technology), high density network is used more and more, and transmission rate also constantly promotes, and correspondingly, cable is intensive in a large number in building machine room and the data center lays, and also becomes more and more outstanding phenomenon.Because the increase of the quantity of information requirement, in heavy construction, particularly in the concealed space of intelligent building, intensively laid a large amount of cables, fail safe has been constituted serious threat.Based on the extensive use of cable in communications, its fire performance is most important for building firesafety, and the cable fire safety has also become one of factor that users and designing unit pay attention to the most.Use the cable that flame propagation is low, anti-flammability is high, can prevent that flame from spreading on other parts and the interior inflammable material of building of building fast, therefore, each cable production firm constantly explores, studies, and the material of seeking better structure and renewal improves the fire resistance of place-and-route product.
At present, the physically foamed pe insulation wrinkled external conductor radio frequency coaxial-cable that traditional house wiring is used, its flame retardant rating is the highest can to reach main line level (upright combustion testing Riser Flame Test, the CMR level of UL1666 or the FT4 level of CSA), be only applicable to the application of part wiring system.For special fire-retardant requirement is arranged, promote as the floor gap in the perpendicular system, the small space of communication cabinet is used in the system horizontal; Particularly when cable need pass through conveyance conduit, high-pressure aerated space or air treatment system and transmits information, need to use the high flame retardant grade product that requires in the fire-protection standard of booster stage, namely reach the cable of booster stage (air-supply combustion testing/this safe sodium air channel experiment Plenum Flame Test/Steiner Tunnel Test, the CMP level of NFPA262 or the FT6 level of CSA) or more senior flame retardant cable.
The utility model content
The utility model embodiment provides a kind of coaxial cable, is used for providing a kind of coaxial cable of booster stage.
A kind of coaxial cable comprises:
Inner wire, insulating barrier, outer conductor and sheath;
Inner wire is positioned at the innermost layer of coaxial cable, and described sheath is positioned at outermost layer; Described insulating barrier is between inner wire and outer conductor;
Described insulating barrier is the matrix type air insulating layer.
Alternatively, described matrix type air insulating layer is the air insulating layer of polyethylene backbone, polyolefin backbone or polytetrafluoroethylene skeleton.
Alternatively, the star-like skeleton as support is four jiaos of star-like or pentalphas in the described matrix type air insulating layer.
Alternatively, the annular thickness of described star-like skeleton is 0.10mm ~ 0.50mm.
Alternatively, described outer conductor is: have the outer conductor of endless metal tubulose wrinkle, perhaps, have the outer conductor of spirality metal tubulose wrinkle.
Alternatively, any one in described inner wire metal wire, composite metal wire, metal tube, the composite metal pipe.
Alternatively, described outer conductor is any one in metal tape, the composite metal belt.
Alternatively, the thickness of described outer conductor is more than or equal to 0.15mm.
Alternatively, the air gap degree of described type air insulating layer is 75% ~ 90%.
Alternatively, described sheath is high flame retardant type sheath.
As can be seen from the above technical solutions, the utility model embodiment has the following advantages: above embodiment has adopted the matrix type air insulating layer as insulating barrier, not only fire-retardant, and the concentration of the cigarette that blazes up is very low, has the characteristic that prevents that fire from spreading at floor gap, its flame-retarding characteristic is very excellent, can satisfy the flame retardant cable requirement of booster stage.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is briefly introduced in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the utility model embodiment coaxial cable structure schematic diagram;
Fig. 2 is the utility model embodiment coaxial cable structure schematic diagram;
Fig. 3 is the utility model embodiment coaxial cable tangent plane structural representation;
Fig. 4 is the utility model embodiment coaxial cable tangent plane structural representation;
Fig. 5 is the manufacture method schematic flow sheet of the utility model embodiment coaxial cable.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiment that obtain under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of coaxial cable, as Fig. 1, Fig. 2, Fig. 3 or shown in Figure 4, comprising:
Above-mentioned insulating barrier 201 is matrix type air insulating layer 201.
Above embodiment has adopted matrix type air insulating layer 201 as insulating barrier 201, not only fire-retardant, and the concentration of the cigarette that blazes up is very low, has the characteristic that prevents that fire from spreading at floor gap, its flame-retarding characteristic is very excellent, can satisfy the flame retardant cable requirement of booster stage.
Alternatively, the utility model embodiment also provides the preferred material of the air insulating layer 201 of skeleton shape to give an example, and as follows: above-mentioned matrix type air insulating layer 201 is the air insulating layer 201 of polyethylene backbone, polyolefin backbone or polytetrafluoroethylene skeleton.
Alternatively, the star-like skeleton as support is four jiaos of star-like or pentalphas in the above-mentioned matrix type air insulating layer 201.Please participate in Fig. 3 and Fig. 4, wherein Fig. 3 is pentalpha, Fig. 4 be four jiaos star-like, need to prove that the number of above feet can also be other, more than as the restriction that preferably should not be construed as for example the utility model embodiment.
Alternatively, the annular thickness of above-mentioned star-like skeleton is 0.10mm ~ 0.50mm.Above-mentioned annular thickness refers to be close to the annular thickness of inner wire 101, and this annular is to fix four or five support angles of star-like skeleton.
Alternatively, above-mentioned outer conductor 301 is: have the outer conductor 301 of endless metal tubulose wrinkle, perhaps, have the outer conductor 301 of spirality metal tubulose wrinkle.Subsequent embodiment will provide specifically with regard to both of these case respectively and illustrate.Wherein, the former loss is littler, and the latter has better flexibility, and particularly: the latter's single bending radius is 20 millimeters, and the former single bending radius is 70 millimeters.
Alternatively, the utility model embodiment also provides the optional material of inner wire 101 to give an example, and as follows: above-mentioned inner wire 101 is any one in metal wire, composite metal wire, metal tube, the composite metal pipe.
Alternatively, above-mentioned outer conductor 301 is metal tape or composite metal belt.
Alternatively, above-mentioned outer conductor 301 is that thickness is more than or equal to 0.15mm.
Alternatively, the air gap degree of above-mentioned type air insulating layer 201 is 75% ~ 90%.
Alternatively, above-mentioned sheath 401 is high flame retardant type sheath 401.
The coaxial cable that above embodiment provides is the coaxial cable with outer conductor 301 of high flame retardant type air insulation wrinkle, what adopt is matrix type air insulation structure, also adopted the material of high flame retardant type as sheath 401 simultaneously, not only fire-retardant, and the concentration of the cigarette that blazes up is very low, has the characteristic that prevents that fire from spreading at floor gap, its flame-retarding characteristic is very excellent, can satisfy the flame retardant cable requirement of booster stage, being the Plenum(high pressure that is best suited for indoor ceiling) indoor signal in space covers the transfer element of wiring, and its application prospect is very wide.
The utility model embodiment adopts air insulation wrinkled external conductor 301 radio frequency coaxial-cables of flame retardant type to adopt the air insulation structure, has lower loss, advantage such as possessed very the excellent fire retardant characteristic simultaneously, decay is low, voltage standing wave ratio is little, long-term serviceability is stable.Flame retardant type air insulation wrinkled external conductor 301 radio frequency coaxial-cables that the utility model embodiment adopts are mainly used in the radiofrequency signal of certain power is sent to transmitting antenna by transmitter, and the zone that forms wireless signal covers.With traditional RF(Radio Frequency, radio frequency) cable is compared, the product that the utility model embodiment provides has very excellent fire retardant characteristic, because the air gap degree height of the insulating barrier of the coaxial cable that the utility model embodiment provides, its dielectric constant is near the dielectric constant of air dielectric, therefore, the coaxial cable that the utility model embodiment provides has lower loss and bigger power capacity simultaneously, be specially adapted to indoor signal and cover usefulness, a kind of safer cabling scenario is provided.
Flame retardant type air insulation wrinkled external conductor 301 radio frequency coaxial-cables that the utility model embodiment adopts can be obtained by following mode: a cable core is provided, and this heart yearn comprises:
The inner wire 101 of a metal material, the material of above-mentioned inner wire 101 can be metal wire, composite metal wire, metal tube or composite metal pipe, plays the signal transmitting effect;
The one matrix type air insulating layer 201 around this inner wire 101, it plays and supports internal and external conductor 301, improves the mechanical strength effect;
A sheath 401 plays the outer jacket protective effect closely round this outer conductor 301.
The technical problem that the utility model embodiment can solve is: a kind of new radio frequency coaxial-cable with flame-retarding characteristic is provided, above scheme is owing to adopt air as the dielectric between inner and outer conductor, in cable insulation 201, except a part of solid dielectric that supports internal and external conductor 301, all the other most of volumes all are air, only use the coaxial configuration of seldom polyethylene, polyolefin or polytetrafluoroethylene skeleton maintenance inner and outer conductor, its design feature is can not pass through dielectric layer from a conductor to another conductor; Adopted high flame resistance, low smoke type sheath 401 production simultaneously, characteristics such as it is low so just can to have when burning smoke density, and flame-retarding characteristic is excellent, and loss is low, and power is big.
The coaxial cable that the utility model embodiment adopts has changed the structure of the insulating barrier of physically foamed pe insulation wrinkled external conductor radio frequency coaxial-cable, replace traditional physically foamed pe insulation structure with matrix type air insulating layer 201 structures, the air gap degree of the matrix type air insulating layer 201 that the utility model embodiment adopts is for can reach 75% ~ 90%.Simultaneously, the utility model embodiment also adopts high flame retardant type low-smoke and flame retardant polyvinyl chloride or polyvinylidene fluoride (PVDF, Polyvinylidene fluoride) or the traditional fire retardant polyolefin of the material substitution of other high flame retardant type as the material of sheath 401, it is low to have burning time averag density and photopeak value density like this, flame-retarding characteristic is excellent, the electric property excellent characteristics.
Describe execution mode of the present utility model in detail below with reference to drawings and Examples, how the application technology means solve technical problem to the utility model whereby, and the implementation procedure of reaching technique effect can fully understand, and implement according to this.Need to prove that each feature under the situation of not conflicting among the utility model embodiment and the embodiment can mutually combine, following examples should not be construed as the restriction to the utility model embodiment.
First embodiment:
First kind of coaxial cable structure that the utility model embodiment provides comprises metal inner wire 101, matrix type polyethylene air insulating layer 201, annular wrinkle tubular metal outer conductor 301, sheath 401 as shown in Figure 1.
Wherein, matrix type polyethylene air insulating layer 201 plays the effect of supporting inner wire 101 and outer conductor 301 and insulation between inner wire 101 and outer conductor 301;
Annular wrinkle tubular metal outer conductor 301 is wrapped in outside the matrix type polyethylene air insulating layer 201;
Sheath 401 is positioned at the outermost of the coaxial cable of the utility model embodiment, avoids infringement for the protection of coaxial cable.
Preferably, the structure of the coaxial cable that present embodiment provides is used for low-loss type high flame retardant air-spaced coaxial cable, insulating barrier 201 adopts skeleton air insulation structure, and inner wire 101 can adopt: metal wire, composite metal wire, metal tube or composition metal tubulose structure; Outer conductor 301 adopts endless metal tubulose wrinkled external conductors 301, and the sheet metal strip of outer conductor 301 usefulness can be copper, aluminium matter or copper cover aluminum matter, and preferably, outer conductor 301 usefulness sheet metal strip thickness are not less than 0.15mm.
Preferably, the production program of outer conductor 301 can be: by band side cut, moulding, be connected into tubulose through argon arc welding again, embossing forms the annular bellows of the diameter that requires behind the drawn mould sizing.
Preferably, the star-like skeleton of matrix type polyethylene air insulating layer 201 can be the skeleton air insulation structure of four jiaos of stars or pentalpha.Insulating material can be the insulation materials that dielectric constant is little, intensity is high such as polyethylene, polyolefin or polytetrafluoroethylene.
Preferably, sheath 401 can be tubular structure, and sheath 401 is centered around the skin of outer conductor 301, plays the effect of protection cable.The material of sheath 401 can be low-smoke and flame retardant polyvinyl chloride or polyvinylidene fluoride (PVDF; Polyvinylidene fluoride) thermoplasticity sheath level coating material such as; this sheath 401 has the performance of mechanical performance and high flame retardant preferably; play the effect of protection cable, guaranteed the mechanical strength of cable inherence and the fail safe of use.
Second embodiment:
Second kind of coaxial cable structure that the utility model embodiment provides as shown in Figure 2, comprises inner wire 101, matrix type polyethylene air insulating layer 201, spiral corrugated tubular metal outer conductor 301, sheath 401.
Wherein matrix type polyethylene air insulating layer 201 plays the insulating effect between support and the inner and outer conductor 301 between inner wire 101 and outer conductor 301;
Spiral corrugated tubular metal outer conductor 301 is wrapped in outside the matrix type polyethylene air insulating layer 201;
Preferably, the structure of the coaxial cable that present embodiment provides is used for super soft type high flame retardant air-spaced coaxial cable, insulating barrier 201 adopts skeleton air insulation structure, and metal inner wire 101 adopts metal wire, composite metal wire, metal tube or composition metal tubulose structure; Outer conductor 301 adopts spirality metal tubulose wrinkled external conductors 301, and the sheet metal strip of outer conductor 301 usefulness can be copper, aluminium matter or copper cover aluminum matter, and preferably, outer conductor 301 usefulness sheet metal strip thickness are not less than 0.15mm.
Preferably, the production program of outer conductor 301 can be: by band side cut, moulding, be connected into tubulose through argon arc welding again, embossing forms the spirality bellows of the diameter that requires behind the drawn mould sizing.
Preferably, insulation is the skeleton air insulation structure of four jiaos of stars or pentalpha.Insulating material can be the insulation materials that dielectric constant is little, intensity is high such as polyethylene, polyolefin or polytetrafluoroethylene.
More than the contrast of two embodiment, as shown in table 1:
Table 1
In the skeleton shape air insulation structure fabrication scheme of high flame retardant type air insulation wrinkled external conductor 301 radio frequency coaxial-cables of the utility model embodiment, the control of its key technology is: the selecting for use and the control of sheath extrusion process of the star skeleton structure of polyethylene, polyolefin or polytetrafluoroethylene and the control of the manufacturing process of external diameter, high flame retardant type sheath material.Insulating barrier 201 voidages are too big or too little, will cause not matching of characteristic impedance.The utility model embodiment is different according to inner wire 101 and insulating barrier 201 structures, voidage can be designed to 75% ~ 90%, the characteristic impedance index that can obtain to be complementary.
In addition, because the dielectric constant of medium is low big to the loss objective influence of cable, dielectric constant is more little, and the loss of cable is more low.This project obtains minimum insulative dielectric constant and good loss objective by adjusting voidage.
The star skeleton structure of the insulating barrier 201 that the utility model embodiment provides is extruded evenly, and the long-time stability of product are more stable.The utility model embodiment can be by the annular thickness of control skeleton shape air insulating layer 201 external diameters and star skeleton, obtain uniform air insulation structure, can control more efficiently that moisture is invaded insulating barrier 201 and useful life of influencing product, simultaneously, the return loss of product is excellent, and long-term serviceability is reliable and stable.Wherein the annular thickness of skeleton shape air insulating layer 201 is preferably: 0.10mm ~ 0.5mm.
Particularly, as shown in Figure 5, and can consult Fig. 1 ~ 4 in the lump, the utility model embodiment provides a kind of manufacture method of coaxial cable, comprising:
501: the inner wire 101 that obtains to meet above-mentioned inner conductor 101 standards;
Above-mentioned inner conductor 101 standards can comprise that the various parameter the utility model of conductivity, thickness etc. embodiment will not limit this.
The above-mentioned acquisition mode that meets the inner wire 101 of above-mentioned inner conductor 101 standards specifically can be: takes inner wire coil and unwrapping wire, carries out the inner wire sizing then, thus the inner wire 101 of the thickness that obtains stipulating.
502: obtain matrix type air insulating layer 201 by extrusion molding in above-mentioned inner wire 101 outsides;
503: obtain to meet outer conductor 301 raw materials of coaxial cable standard, and the outside that outer conductor 301 raw materials are soldered to above-mentioned matrix type air insulating layer 201 is obtained outer conductor 301;
Above-mentioned outer conductor 301 raw materials that meet the coaxial cable standard can comprise that the various attribute the utility model of surface quality, conductivity, electromagnetic shielding characteristic, thickness etc. embodiment will not limit this.
Above-mentioned acquisition meets outer conductor 301 raw materials of coaxial cable standard, and the outside that outer conductor 301 raw materials are soldered to above-mentioned matrix type air insulating layer 201 is obtained outer conductor 301 comprises: above-mentioned outer conductor raw material is band; To band side cut, moulding, be connected into tubulose through argon arc welding again, form annular or the spiral bellows of the diameter that requires behind the sizing.
504: obtain sheath 401 by extrusion molding in the outside of above-mentioned outer conductor 301.
Be understandable that after execution of step 504, obtained the coaxial cable that the utility model embodiment provides, can the take-up storage.
Be understandable that after execution of step 504, obtained the coaxial cable that the utility model embodiment provides, can the take-up storage.
Above embodiment has adopted matrix type air insulating layer 201 as insulating barrier 201, not only fire-retardant, and the concentration of the cigarette that blazes up is very low, has the characteristic that prevents that fire from spreading at floor gap, its flame-retarding characteristic is very excellent, can satisfy the flame retardant cable requirement of booster stage.
One of ordinary skill in the art will appreciate that all or part of step that realizes among above-mentioned each method embodiment is to instruct relevant hardware to finish by program, corresponding program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
It below only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model embodiment discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (10)
1. a coaxial cable is characterized in that, comprising:
Inner wire, insulating barrier, outer conductor and sheath;
Inner wire is positioned at the innermost layer of coaxial cable, and described sheath is positioned at outermost layer; Described insulating barrier is between inner wire and outer conductor;
Described insulating barrier is the matrix type air insulating layer.
2. according to the described coaxial cable of claim 1, it is characterized in that,
Described matrix type air insulating layer is the air insulating layer of polyethylene backbone, polyolefin backbone or polytetrafluoroethylene skeleton.
3. according to the described coaxial cable of claim 2, it is characterized in that,
Star-like skeleton as support in the described matrix type air insulating layer is four jiaos of star-like or pentalphas.
4. according to the described coaxial cable of claim 3, it is characterized in that,
The annular thickness of described star-like skeleton is 0.10mm ~ 0.50mm.
5. according to the described coaxial cable of claim 1, it is characterized in that,
Described outer conductor is: have the outer conductor of endless metal tubulose wrinkle, perhaps, have the outer conductor of spirality metal tubulose wrinkle.
6. according to any described coaxial cable of claim 1 to 5, it is characterized in that,
In described inner wire metal wire, composite metal wire, metal tube, the composite metal pipe any one.
7. according to any described coaxial cable of claim 1 to 5, it is characterized in that,
Described outer conductor is any one in metal tape, the composite metal belt.
8. according to the described coaxial cable of claim 7, it is characterized in that,
The thickness of described outer conductor is more than or equal to 0.15mm.
9. according to any described coaxial cable of claim 1 to 5, it is characterized in that,
The air gap degree of described type air insulating layer is 75% ~ 90%.
10. according to any described coaxial cable of claim 1 to 5, it is characterized in that,
Described sheath is high flame retardant type sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320035933 CN203070823U (en) | 2013-01-23 | 2013-01-23 | Coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320035933 CN203070823U (en) | 2013-01-23 | 2013-01-23 | Coaxial cable |
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| Publication Number | Publication Date |
|---|---|
| CN203070823U true CN203070823U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320035933 Expired - Lifetime CN203070823U (en) | 2013-01-23 | 2013-01-23 | Coaxial cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050184A (en) * | 2013-01-23 | 2013-04-17 | 珠海汉胜科技股份有限公司 | Coaxial cable, and manufacturing method of coaxial cable |
-
2013
- 2013-01-23 CN CN 201320035933 patent/CN203070823U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050184A (en) * | 2013-01-23 | 2013-04-17 | 珠海汉胜科技股份有限公司 | Coaxial cable, and manufacturing method of coaxial cable |
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