CN202997021U - Coupled leakage cable - Google Patents
Coupled leakage cable Download PDFInfo
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- CN202997021U CN202997021U CN 201220723290 CN201220723290U CN202997021U CN 202997021 U CN202997021 U CN 202997021U CN 201220723290 CN201220723290 CN 201220723290 CN 201220723290 U CN201220723290 U CN 201220723290U CN 202997021 U CN202997021 U CN 202997021U
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- coated
- outer conductor
- leaky cable
- coupled mode
- thin layer
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Abstract
The utility model relates to a cable technology, and particularly relates to a coupled leakage cable. The coupled leakage cable provided by the utility model is realized through the technical solution that the coupled leakage cable comprises an inner conductor, an insulating layer coated outside the inner conductor, an outer conductor coated outside the insulating layer, and a sheath coated outside the outer conductor, wherein the outer conductor is provided with a plurality of smooth and parallelly distributed annular bulges, each of the annular bulges is provided with a smooth hole, and the insulating layer comprises an inner thin layer coated on the inner conductor, a foaming layer coated on the inner thin layer, and an outer thin layer coated outside the foaming layer. The coupled leakage cable provided by the utility model has good electrical properties.
Description
Technical field
The utility model relates to cable technology, particularly a kind of coupled mode leaky cable.
Background technology
The coupled mode leaky cable is the not exclusively cable of sealing of outer conductor; In the process that radiofrequency signal is transmitted in leakage coaxial cable, a part is coupled to space outerpace by the outer conductor hole, and opposite external radio-frequency signal also can be coupled to cable inside by the outer conductor hole; Thereby leaky cable has the transmitting effect of dual-use function, radiofrequency signal and the reception of reception antenna is done; Be mainly used in the weak busy district of communication system, as tunnel, subway; Yet its insulation layer structure of leaky cable of the prior art is comparatively single, makes the electric property of leaky cable relatively poor.
The utility model content
The purpose of this utility model is to provide a kind of coupled mode leaky cable, has good electric property.
above-mentioned technical purpose of the present utility model is achieved by the following technical programs: a kind of coupled mode leaky cable, comprise inner wire, be coated on the outer insulating barrier of described inner wire, be coated on the outer outer conductor of described insulating barrier, be coated on the outer sheath of described outer conductor, having a plurality of smooth and annular projections parallel distribution on described outer conductor makes described outer conductor be accordion, each described annular projection has smooth hole, described insulating barrier comprises the interior thin layer that is coated on described inner wire, be coated on the foaming layer of described interior thin layer, be coated on the outer outer thin layer of described foaming layer.
As of the present utility model preferred, the foam degrees of described foaming layer 〉=85%.
As of the present utility model preferred, the distance between adjacent described annular projection is 5-10mm.
As of the present utility model preferred, the crest external diameter of described outer conductor is 22-25mm, and the trough external diameter is 20-22mm.
As of the present utility model preferred, the diameter of described inner wire is 8-12mm.
As of the present utility model preferred, the external diameter of described insulating barrier is 14-20mm.
As of the present utility model preferred, described hole is ellipticity.
As of the present utility model preferred, the hole on each described annular projection is 4-6, and evenly distributes.
In sum, the utlity model has following beneficial effect: the insulation layer structure of the utility model uniqueness makes and the utlity model has outstanding electric property, has simultaneously stable mechanical performance, an advantage such as intensity is high and humidity resistance is good; Adopt simultaneously the oxygen-free copper conductor on internal and external conductor, conductance 〉=100%, oxygen content＜10ppm, with and reduce the loss factor of conductor; Adopt physical blowing equipment on dielectric, adopt CO
2Foaming reaches more than 85% the foam degrees of dielectric, has effectively reduced dielectric constant, thereby has reduced dielectric loss coefficient, has improved transmission rate; Simultaneously, because the utility model also has the advantages such as coupling loss is little.
Description of drawings
Fig. 1 is embodiment 1 structural representation;
Fig. 2 is insulation layer structure schematic diagram in embodiment 1.
In figure, 1, inner wire, 2, insulating barrier, 3, outer conductor, 4, sheath, 31, annular projection, 32, the hole, 21, interior thin layer, 22, foaming layer, 23, outer thin layer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
This specific embodiment is only to explanation of the present utility model; it is not to restriction of the present utility model; those skilled in the art can make to the present embodiment the modification that there is no creative contribution as required after reading this specification, but as long as all are subject to the protection of Patent Law in claim scope of the present utility model.
embodiment 1: as shown in Fig. 1-2, a kind of coupled mode leaky cable, comprise inner wire 1, be coated on the outer insulating barrier 2 of described inner wire 1, be coated on the outer outer conductor 3 of described insulating barrier 2, be coated on the outer sheath 4 of described outer conductor 3, having a plurality of smooth and annular projections 31 parallel distribution on described outer conductor 3 makes described outer conductor 3 be accordion, each described annular projection 31 has smooth hole 32, described insulating barrier 2 comprises the interior thin layer 21 that is coated on described inner wire 1, be coated on the foaming layer 22 of described interior thin layer 21, be coated on the outer outer thin layer 23 of described foaming layer 22, the foam degrees of foaming layer 22 〉=85%, distance between adjacent annular projection 31 is 7mm, the crest external diameter of outer conductor 3 is 24mm, and the trough external diameter is 21mm, the diameter of inner wire 1 is 10mm, the external diameter of insulating barrier 2 is 18mm, hole 32 is ellipticity, hole 32 on each annular projection 31 is 4, and evenly distributes.
The preparation method is as follows: comprise the following steps successively:
(1) preparation of inner wire;
(2) extruded insulation body, first inner wire is passed into interior thin layer extruder, thin layer in forming outside inner wire, be divided into three sections temperature controls from charging aperture to the discharging opening of interior thin layer extruder, being followed successively by first paragraph 150 degree and temperature retention time is 3min, second segment 170 degree and temperature retention time are 4min, and the 3rd section is that 185 degree and temperature retention time are 5min; The inner wire that will be extruded with again interior thin layer passes into the foaming insulation layer extruder and forms insulating barrier, with the 69wt% high density polyethylene (HDPE), the 30wt% low density polyethylene (LDPE), 1wt% modification azo diformazan phthalein amine nucleator is mixed is incorporated in heating and melting in the foaming insulation layer extruder, subsequently heating and gasifying purity is reached 99.9% CO
2Gas measures with 390Mpa pressure by syringe and injects melting insulator, abundant mixing mixing; Control gas injection port place temperature 200 degree, insulation melts temperature 150 degree, extrusion mould-outlet temperature 130 degree, and controller neck to the die orifice temperature difference is ± 2 degree, make the temperature that extrudes the inner wire after interior thin layer be down to 55 degree and enter die orifice, make molten mixture together by extrusion die under the pressurized condition, thereby form foaming layer, the foam degrees of foaming layer 〉=85%; Thin layer outside forming outside foaming layer by outer thin layer extruder again, outer thin layer extruder has three sections temperature controls by charging aperture to extruding end, being followed successively by first paragraph 155 degree and temperature retention time is 4min, and second segment 165 degree and temperature retention time are 3min, and the 3rd section is that 190 degree and temperature retention time are 5min;
(3) outer conductor preparation, the thin layer outer cladding adopts the copper pipe that oxygen-free copper is made outside, and again through the stable head of embossing that rotates and embossing cutter to the copper tube rolling extrusion molding, after roughing preforming and finish rolling forming process, form annular wrinkle copper pipe outer conductor at a high speed;
(4) perforate evenly arranges hole on the annular protrusion of annular wrinkle copper pipe outer conductor; The pitch of described annular wrinkle copper pipe outer conductor is 7mm; The crest external diameter of described annular wrinkle copper pipe outer conductor is 24mm, and the trough external diameter is 21mm; Hole is ellipticity, and is provided with 4 on each annular protrusion;
(5) extrude sheath, utilize plastic extruder, protective cover material is promoted melting, then will pass into the plastics plastic extruding machine through the semi-finished product of step (3) through preheating, screw rod Stirring, the continuously and smoothly extrudes through the extrusion die shaping, forms sheath outward thereby make protective cover material be coated on outer conductor; The plastics plastic extruding machine has seven sections temperature controls by charging aperture to extruding end, being followed successively by first paragraph 175 degree and temperature retention time is 2min, second segment 195 degree and temperature retention time are 3min, the 3rd section 205 the degree and temperature retention time be 3min, the 4th section 195 the degree and temperature retention time be 4min, the 5th section 185 the degree and temperature retention time be 3.5min, the 6th section 175 the degree and temperature retention time be 4min, the 7th section 165 the degree and temperature retention time be 3min.
The partial parameters of 7/8 coupled mode leaky cable of the present embodiment preparation is as follows:
1, return loss: 1MHZ-3000MHZ 21dB, 300MHZ-500MHZ 26dB, 800MHZ-1000MHZ 26dB, 1700MHZ-1900MHZ 26dB, 1900MHZ-3000MHZ 21dB;
2, decay: 75MHZ-1.18 dB/100m, 150MHZ-1.68dB/100m, 450MHZ-2.8 dB/100m, 800MHZ-4.0dB/100m, 900MHZ-4.3dB/100m, 1800MHZ-6.5 dB/100m, 2200MHZ-7.4 dB/100m, 2400MHZ-8.2 dB/100m;
3, coupling loss (50% ± 10dB) 75MHZ-62/72dB, 150MHZ-65/75dB, 450MHZ-71/81dB, 800MHZ-75/85 dB, 900MHZ-71/87 dB, 1800MHZ-80/89 dB, 2200MHZ-80/88 dB, 2400MHZ-80/89dB;
4, impedance: 50 ± 1 Ω;
5, transmission speed ratio: 88%;
6, inner wire D.C. resistance: 1.0 Ω/km;
7, outer conductor D.C. resistance: 1.2 Ω/km;
8, dielectric strength: 10kv;
9, insulation resistance: 10000M Ω/km.
Embodiment 2: be with the difference of embodiment 1, the distance between adjacent annular projection 31 is 5mm; The crest external diameter of outer conductor 3 is 22mm, and the trough external diameter is 20mm; The diameter of inner wire 1 is 8mm; The external diameter of insulating barrier 2 is 14mm; Hole 32 is ellipticity; Hole 32 on each annular projection 31 is 5, and evenly distributes.
The preparation method is similar to Example 1.
Embodiment 3: be with the difference of embodiment 1, the distance between adjacent annular projection 31 is 10mm; The crest external diameter of outer conductor 3 is 25mm, and the trough external diameter is 22mm; The diameter of inner wire 1 is 12mm; The external diameter of insulating barrier 2 is 20mm; Hole 32 is ellipticity; Hole 32 on each annular projection 31 is 6, and evenly distributes.
The preparation method is similar to Example 1.
Claims (8)
1. coupled mode leaky cable, comprise inner wire (1), be coated on the outer insulating barrier (2) of described inner wire (1), be coated on the outer outer conductor (3) of described insulating barrier (2), be coated on the outer sheath (4) of described outer conductor (3), having a plurality of smooth and annular projections (31) parallel distribution on described outer conductor (3) makes described outer conductor (3) be accordion, each described annular projection (31) has smooth hole (32), it is characterized in that, described insulating barrier (2) comprises the interior thin layer (21) that is coated on described inner wire (1), be coated on the foaming layer (22) of described interior thin layer (21), be coated on the outer outer thin layer (23) of described foaming layer (22).
2. a kind of coupled mode leaky cable according to claim 1, is characterized in that, the foam degrees of described foaming layer (22) 〉=85%.
3. a kind of coupled mode leaky cable according to claim 2, is characterized in that, the distance between adjacent described annular projection (31) is 5-10mm.
4. a kind of coupled mode leaky cable according to claim 3, is characterized in that, the crest external diameter of described outer conductor (3) is 22-25mm, and the trough external diameter is 20-22mm.
5. a kind of coupled mode leaky cable according to claim 4, is characterized in that, the diameter of described inner wire (1) is 8-12mm.
6. a kind of coupled mode leaky cable according to claim 5, is characterized in that, the external diameter of described insulating barrier (2) is 14-20mm.
7. a kind of coupled mode leaky cable according to claim 1, is characterized in that, described hole (32) are ellipticity.
8. a kind of coupled mode leaky cable according to claim 7, is characterized in that, the hole (32) on each described annular projection (31) is 4-6, and evenly distribute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220723290 CN202997021U (en) | 2012-12-25 | 2012-12-25 | Coupled leakage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220723290 CN202997021U (en) | 2012-12-25 | 2012-12-25 | Coupled leakage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997021U true CN202997021U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220723290 Expired - Fee Related CN202997021U (en) | 2012-12-25 | 2012-12-25 | Coupled leakage cable |
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| CN (1) | CN202997021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022610A (en) * | 2012-12-25 | 2013-04-03 | 浙江德通科技有限公司 | Coupled leakage cable |
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2012
- 2012-12-25 CN CN 201220723290 patent/CN202997021U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022610A (en) * | 2012-12-25 | 2013-04-03 | 浙江德通科技有限公司 | Coupled leakage cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Production method for coupled leakage cables Effective date of registration: 20140924 Granted publication date: 20130612 Pledgee: Zhejiang Deqing rural commercial bank Limited by Share Ltd Pledgor: Zhejiang Detong Technology Co., Ltd. Registration number: 2014990000801 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20151225 |
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| EXPY | Termination of patent right or utility model |