CN201503903U - High-property radiation type leakage coaxial cable - Google Patents
High-property radiation type leakage coaxial cable Download PDFInfo
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- CN201503903U CN201503903U CN2009202348273U CN200920234827U CN201503903U CN 201503903 U CN201503903 U CN 201503903U CN 2009202348273 U CN2009202348273 U CN 2009202348273U CN 200920234827 U CN200920234827 U CN 200920234827U CN 201503903 U CN201503903 U CN 201503903U
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Abstract
The utility model discloses a high-property radiation type leakage coaxial cable, which comprises an inner conductor, an insulation layer, an outer conductor and an outer sheath. The inner conductor is embedded inside the outer conductor through the insulation layer, the inner conductor and the outer conductor are located at concentric circle positions, the outer conductor is provided with a plurality of notches along a lengthwise direction, the insulation layer sequentially includes an insulation inner skin layer, an insulation foaming layer and an insulation outer skin layer from inside to outside, an adhesion layer is arranged between the outer conductor and the outer sheath, and the adhesion layer is a natural adhesive coating layer or a synthesis adhesive coating layer. The coaxial cable not only has advantageous bending mechanism property and waterproof and corrosion resistance properties, has excellent information transmission property, and further has the advantages of simple structure and convenient mounting and construction.
Description
Technical field
The utility model relates to the signal-transmitting cable of wireless communication technology field, relates in particular to a kind of improvement of leaky coaxial cable insulation system of radial pattern.
Background technology
Leaky coaxial cable is a kind of opening transmission yarn that is used for radiocommunication signals transmission, and along cable internal transmission signal, a part is coupled to the transmission system that this conductor and surrounding environment are constituted by the hole on the outer conductor.When leaky coaxial cable communicates, can produce uniform signal strength in certain scope, and not be subjected to surrounding environment influence, there is not communication blind district in the communication reliability height yet, and incoming level is stable, is not easy to be subjected to extraneous signal and disturbs.Therefore this coaxial cable has the raising radio wave coverage, effectively eliminates the advantage of transmission blind spot, extensively applies in railway, tunnel, mine and the radio communication service.
In occasions such as high-speed rail transportation, magnetic suspension train, subway engineering, mountain area tunnel, underground mines, and the radio communication occasion that covers of wireless communication system and indoor and outdoor building is when communicating, radio wave will be hindered inevitably, and especially the transmission attenuation that is subjected to of shortwave and ultrashort wave is bigger.Leaky coaxial cable then can make electrical signal energy in conductor longitudinally homogeneous radiation, to reach the purpose of outside propagation and reception external radio waves.So leaky cable in a wider context, and especially complicated unfavorable zone and occasion have obtained very using widely.
Leaky coaxial cable is a kind of special cable, its structure comprises structures such as inner wire, insulating barrier, outer conductor, oversheath from the inside to surface successively, inner wire is flush-mounted in the outer conductor by insulating barrier, and inner wire and outer conductor are in concentric circles (coaxial) state, outer conductor is at longitudinally, with certain interval and multi-form fluting, the purpose of fluting is for its signal energy can be radiated from the cable notch, and the version of fluting depends on the frequency range of the radio wave that uses to a great extent.
Existing leaky coaxial cable structure mainly contains three kinds, it is the bellows outer conductor, braided outer conductor and smooth metal pipe outer conductor, preceding relatively two kinds of outer conductor structures, adopt the leaky coaxial cable of smooth metal pipe outer conductor, superior performance such as have that volume is little, decay is low, standing-wave ratio is little, signal distortion is little when crooked.But this structure also comes with some shortcomings in actual use; At first smooth metal pipe outer conductor can not well be fitted with oversheath and insulation sandwich layer, is easy to generate relative slippage, causes bending property relatively poor relatively, and installation capability, mechanical performance and the serviceability of cable all produced very adverse influence; The waterproof corrosion resistance of this cable is also relatively poor in addition, can not stop the intrusion of corroding thing, directly influences the serviceability and the working life of cable.The insulating barrier of existing this cable mostly adopts the solid layer structure simultaneously, though this structure manufacture craft is simple, but it has relative higher dielectric constant, directly affect the information transmission performance of cable, people are seeking to improve the method for insulating barrier dielectric constant always, to improve the signal transmission performance of cable.
The utility model content
At the above-mentioned deficiency of existing in prior technology, technical problem to be solved in the utility model provides a kind of high-performance radiant leaky coaxial cable, it can not only make to have closely between metal tube outer conductor and oversheath and be connected, and has good signal of telecommunication transmission performance.
In order to solve the problems of the technologies described above, the utlity model has high-performance radiant leaky coaxial cable, comprise inner wire, insulating barrier, outer conductor and oversheath, inner wire is flush-mounted in the outer conductor by insulating barrier, and inner wire and outer conductor are in the concentric circles position; Outer conductor is provided with some notches along longitudinally; Described insulating barrier outwards is followed successively by insulation endodermis, insulation foaming layer and insulation sheath layer from the lining; Be provided with adhesive layer between described outer conductor and oversheath, this adhesive layer is natural glue coating or composite adhesives coating.
After adopting said structure, owing between outer conductor and oversheath, be provided with adhesive layer, this adhesive layer makes that realization is bonding closely between oversheath and outer conductor, make whole cable constitute a complete organic whole, not only stoped the mutual slippage between oversheath and outer conductor effectively, flexural deformation that is caused and bending property are obviously descended the degradation deficiency; And adhesive layer constituted the seamless binding protective layer in the outer conductor outside, stoped pollutants such as water to outer conductor, then to the intrusion of inner wire effectively, makes this coaxial cable have superior safety in utilization, mechanical performance and workability.When various forms of bending takes place in the application's coaxial cable in construction, the interstructural bending stress of each layer of cable that closely bonds mutually evenly distributes, mutual alignment in elastic range between each corresponding points is fixed, improve squeezing mutually of structure interlayer effectively and drawn force-bearing situation, had fabulous bending property.The coaxial cable of this structure also has simple in structure, and is easily manufactured, is convenient to site operation, and suitable many knuckles, moist rich water occasion are used.Again because insulating barrier comprises insulation endodermis, insulation foaming layer and insulation sheath layer three-decker, the foam hole that froth bed is not connected, the dielectric constant and the cable transmission attenuation constant of insulating barrier are descended greatly, thereby improved cable transmission performance effectively, insulation endodermis and insulation sheath layer have strengthened the contact strength of foaming layer and inner wire and outer conductor again effectively, have stable structure and adhesive property more.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structural profile schematic diagram of a kind of embodiment of the utility model.
Among the figure, 1---inner wire, 2---the insulation foaming layer, 3---outer conductor, 4---tack coat, 5---oversheath, 6---the insulation sheath layer, 7---the insulation endodermis.
Embodiment
In the leaky coaxial cable with bonding watertight composition shown in Figure 1, this cable from inside to outside is followed successively by: be positioned at the leaky coaxial cable center inner wire 1, insulating barrier, be coated on adhesive layer 4 and oversheath 5 that the outer outer conductor 3 of insulating barrier, bituminous coating constitute.This inner wire 1 is a solid copper wire, insulating barrier outwards comprises insulation endodermis 7 successively from the lining, insulation foaming layer 2 and insulation sheath layer 6, the endodermis 7 that wherein insulate is the solid endodermis of polyethylene, insulation foaming layer 2 is the foamed polyethylene layer of hole-closing structure, and insulation sheath layer 6 is the solid exodermis of polyethylene.Outer conductor 3 is copper thin-wall metal pipe, this light-wall pipe rolls vertical weldering by sheet metal strip and forms, with certain some open notch (not shown)s that are interval with, 4 of adhesive layers are bituminous coating to outer conductor 3 at longitudinally, and outer jacket 5 is for extruding the high density polyethylene (HDPE) Insulation Material on it.The each part mentioned above material is conventional versatile material.
Claims (6)
1. one kind has high-performance radiant leaky coaxial cable, comprise inner wire (1), insulating barrier, outer conductor (3) and oversheath (5), inner wire (1) is flush-mounted in the outer conductor (3) by insulating barrier, and inner wire (1) and outer conductor (3) are in the concentric circles position; Outer conductor (3) is provided with some notches along longitudinally; It is characterized in that: described insulating barrier outwards is followed successively by insulation endodermis (7), insulation foaming layer (2) and insulation sheath layer (6) from the lining; Be provided with adhesive layer (4) between described outer conductor (3) and oversheath (5), this adhesive layer (4) is natural glue coating or composite adhesives coating.
2. have a high-performance radiant leaky coaxial cable according to claim 1 is described, it is characterized in that: the natural glue coating of described adhesive layer (4) is a bituminous coating.
3. have a high-performance radiant leaky coaxial cable according to claim 1 is described, it is characterized in that: the composite adhesives coating of described adhesive layer (4) is the organic bond coating.
4. have a high-performance radiant leaky coaxial cable according to claim 3 is described, described organic bond coating is synthetic resin or synthetic rubber binder coating.
5. have a high-performance radiant leaky coaxial cable according to claim 1 is described, the composite adhesives coating of described adhesive layer (4) is the inorganic bond coating.
6. have a high-performance radiant leaky coaxial cable according to claim 5 is described, described inorganic bond coating is the waterglass coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202348273U CN201503903U (en) | 2009-08-07 | 2009-08-07 | High-property radiation type leakage coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202348273U CN201503903U (en) | 2009-08-07 | 2009-08-07 | High-property radiation type leakage coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201503903U true CN201503903U (en) | 2010-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202348273U Expired - Lifetime CN201503903U (en) | 2009-08-07 | 2009-08-07 | High-property radiation type leakage coaxial cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN201503903U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950837A (en) * | 2010-09-13 | 2011-01-19 | 网拓(上海)通信技术有限公司 | Leakage coaxial cable and manufacturing method thereof |
| CN112736476A (en) * | 2020-11-19 | 2021-04-30 | 东华大学 | High-gain leaky-wave cable for indoor distribution |
-
2009
- 2009-08-07 CN CN2009202348273U patent/CN201503903U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950837A (en) * | 2010-09-13 | 2011-01-19 | 网拓(上海)通信技术有限公司 | Leakage coaxial cable and manufacturing method thereof |
| CN112736476A (en) * | 2020-11-19 | 2021-04-30 | 东华大学 | High-gain leaky-wave cable for indoor distribution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100609 |
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| CX01 | Expiry of patent term |