CN202126873U - Coaxial cable - Google Patents
Coaxial cable Download PDFInfo
- Publication number
- CN202126873U CN202126873U CN2011202126082U CN201120212608U CN202126873U CN 202126873 U CN202126873 U CN 202126873U CN 2011202126082 U CN2011202126082 U CN 2011202126082U CN 201120212608 U CN201120212608 U CN 201120212608U CN 202126873 U CN202126873 U CN 202126873U
- Authority
- CN
- China
- Prior art keywords
- coaxial cable
- thin layer
- aluminium
- insulation layer
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a coaxial cable and a production process of the coaxial cable, which aim at providing the coaxial cable which is free of moisture, stable in transmission quality and good in electrical performance and the production process of the coaxial cable. The coaxial cable comprises an inner conductor (1), and outer conductor (3), an outer protective sleeve (4) and a combined insulation layer. The combined insulation layer comprises an inner thin layer (21), a foaming insulation layer (22) and an outer thin layer (23) which are sequentially wrapped on the periphery of the inner conductor (1) from inside to outside. The outer conductor (3) is arranged on the periphery of the outer thin layer (23), and the outer protective sleeve (4) wraps the outside of the outer conductor (3). The coaxial cable can be widely used in the field of coaxial cables.
Description
Technical field
The utility model relates to a kind of coaxial cable.
Background technology
Existing plastic-aluminum combined banding pattern outer conductor coaxial cable, its insulating barrier adopts single foaming insulation layer, and because of there is defective in its structure, and production process imperfection causes product not enough below existing in practical application:
1, humidity resistance is poor: (1) single foaming insulation layer directly extrudes in the conductor; Its adhesion strength is poor, in the production and construction process, because of cable closing quotation, unwrapping wire can make cable crooked, stretches; Make between inner wire and the foaming insulation layer and produce the gap, being prone to into, moisture causes the inner wire surface oxidation.(2) insulator adopts single foaming insulation layer to be prone to watered and wetting, in inner wire outsourcing physic foaming insulation layer process, because of the nitrogen in the extrusion machine material barrel mixes with the polyethylene of molten condition mutually; Its pressure is more than 5MPa, after extruding from mould, under atmospheric pressure; The mist of nitrogen and molten polyethylene expands; Therefore the polyethylene foam wall that has physic foaming insulation layer breaks, and in cooling water, gets into moisture content, and semi-finished product get into moisture.
2, get into vertical job contract preface when aluminium-plastic tape, its metal covering is outwardly the time, cross vertical Bao Mo after, vertical scratch on surface is serious.Breaking rate (being cable brachycephaly rate) in the production process reaches more than 4%.
3, electric property is poor: because of the entering of moisture,, its insulating resistance value requires (>=5000M Ω .Km) though reaching corresponding standard reluctantly, and on the low side, use extremely unstable.
4, transmission band is narrow: existing coaxial cable is because of the aluminium base thickness of aluminium-plastic tape is factors such as 0.1mm, metal covering scratch, causes transmission frequency narrower and shielding properties is poor, the about 90dB of its shielding attenuation of 5MHz frequency.
5, stability, poor reliability because of moisture-sensitive, make conductor produce oxidation, and insulating resistance value is low, causes transmission line stability and poor reliability.
The utility model content
The utility model technical problem to be solved is the deficiency that overcomes prior art, provides that a kind of not moisture-sensitive, transmission quality are stable, the coaxial cable of good electric property.
The technical scheme that the said a kind of coaxial cable of the utility model is adopted is: said a kind of coaxial cable comprises inner wire, outer conductor, oversheath; Said a kind of coaxial cable also comprises the composite type insulating barrier; Said composite type insulating barrier comprises interior thin layer, foaming insulation layer, outer thin layer; Thin layer, foaming insulation layer, outer thin layer are wrapped in the periphery of said inner wire from inside to outside successively in said; Said outer layer body is arranged on the periphery of said outer thin layer, and said oversheath is wrapped in the outside of said outer conductor.
Optimally, said outer layer body is an aluminium-plastic tape, and said aluminium-plastic tape comprises aluminium base and plastic cover, and said aluminum plastic composite belt longitudinal wraps in the outer thin layer periphery of said composite type insulating barrier, the place's of putting up bonding that said aluminum plastic composite belt longitudinal bag overlaps to form; Said Duplication of putting up is greater than 18%.
The thickness of said aluminium-plastic tape is 0.25～0.35mm, and said aluminium base face thickness is 0.15～0.2mm.
The technical scheme that production technology adopted of said a kind of coaxial cable is: the production technology of said a kind of coaxial cable may further comprise the steps: thin layer extruder in A) said inner wire being fed; Extrude said interior thin layer and encase said inner wire; Interior thin layer extruder is followed successively by the 150-170 degree by charging aperture to three sections temperature controls of extruding end; The 160-180 degree, the 165-185 degree; B) semi-finished product that encase said inner wire by thin layer in said are extruded said foaming insulation layer with outer thin layer extruder common mode head and are encased said interior thin layer apart from getting into the foaming insulation layer extruder through 1～1.5m; And extrude said outer thin layer and encase said foaming insulation layer; Thin layer, said foaming insulation layer, said outer thin layer encase said inner wire from inside to outside successively in said; Form the composite type insulating barrier; Be wrapped on the take-up reel again; The foaming insulation layer extruder is followed successively by 155 ± 10 ℃, 160 ± 10 ℃, 175 ± 10 ℃, 185 ± 10 ℃, 175 ± 10 ℃, 165 ± 10 ℃, 165 ± 10 ℃ by charging aperture to seven sections temperature controls of extruding end, and outer thin layer extruder is followed successively by 165 ± 10 ℃, 175 ± 10 ℃, 180 ± 10 ℃ by charging aperture to three sections temperature controls of extruding end; C) said composite type insulating barrier encase the cable semi-finished product of said inner wire and as the aluminium-plastic tape of outer conductor through being arranged on the aluminum plastic composite belt longitudinal bag apparatus between pay off rack and the oversheath extruder; And the pottery that passes in the aluminum plastic composite belt longitudinal bag apparatus is indulged Bao Mo; Make said aluminium-plastic tape vertically encase said composite type insulating barrier, in the place's of putting up bonding that vertical bag overlaps to form; The vertical Bao Mo of said pottery is placed on the vertical bag mould holder of said aluminum plastic composite belt longitudinal bag apparatus; D) the cable semi-finished product of the said aluminium-plastic tape of vertical bag get into the jacket extrusion mould of sheath machine; Extrude said oversheath; Thereby form said a kind of coaxial cable, sheath machine is followed successively by 185 ± 5 ℃, 205 ± 5 ℃, 205 ± 5 ℃, 200 ± 5 ℃, 195 ± 5 ℃, 190 ± 5 ℃, 190 ± 5 ℃ by charging aperture to seven sections temperature controls of extruding end.
The beneficial effect of the utility model is: in the utility model; Said a kind of coaxial cable also comprises the composite type insulating barrier; Said composite type insulating barrier comprises interior thin layer, foaming insulation layer, outer thin layer; Thin layer, foaming insulation layer, outer thin layer are wrapped in the periphery of said inner wire from inside to outside successively in said, and said outer layer body is arranged on the periphery of said outer thin layer, and said oversheath is wrapped in the outside of said outer conductor; Employing is formed as one the composite type insulating barrier by thin layer, foaming insulation layer and outer thin layer bonding in said; Thin layer and said inner wire are bonding but peelable in said, this combining structure make between said inner wire and interior thin layer not can because of the bending of operation process and construction with stretch generation gap entering moisture and can effectively prevent the inner wire oxidation, ensure good and stable transmission quality; Said foaming insulation layer also can not get into moisture, makes insulation property keep good, thereby has guaranteed the electric property of cable and stablizing of high-frequency transmission performance.
The coaxial cable product structure design that the utility model provides is reasonable, and material selection is economic and practical, and technical process is improved advanced, and product satisfies the instructions for use of 0.3MHz～3GHz high-frequency information transmission network fully, has following handling characteristics:
1, the product service band is wide: can be used in the network in 0.3MHz～3GHz frequency band as the high-frequency information transmission line.
2, the product shielding properties is excellent: its shielding properties of the coaxial cable that the utility model provides is than more than the high 10dB of existing product shielding properties.
3, anti-outside electromagnetic interference ability is strong, can use in the serious place of electromagnetic interference.
4, the product humidity resistance is good: because of product with compact structure; Tight no gap between inner wire, composite type insulator, outer conductor, each concentric layer of oversheath, moisture can not get into, and humidity resistance is excellent; The inner wire of cable, outer conductor can not produce corrosion; Foaming insulation layer does not make moist, and can reach higher insulation resistance, so stable performance in the product use, reliable.
5, the attenuation constant of product is little: because of shielding properties is excellent, thereby transmission signals is not revealed.
6, the loop resitance value of product is lower than the loop resitance value of same specification magnalium silk Weaving type outer conductor coaxial cable, and the signal attenuation constant of transmission is little.
7, product can be widely applied in the cable TV transmission network network; As main line, service main, branch line audio/video signal transmission, data message symbol; The wire transmission network that also can be used for closed-circuit system or other impedance matchings is as main line, service main, branch line transmission, the transmission of analog or digital signal.
8, long product lifecycle can reach more than 10 years.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
As shown in Figure 1; The said a kind of coaxial cable of the utility model comprises inner wire 1, outer conductor 3, oversheath 4; Said a kind of coaxial cable also comprises the composite type insulating barrier; Said composite type insulating barrier comprises interior thin layer 21, foaming insulation layer 22, outer thin layer 23; Thin layer 21, foaming insulation layer 22, outer thin layer 23 are wrapped in the periphery of said inner wire 1 from inside to outside successively in said, and said outer layer body 3 is arranged on the periphery of said outer thin layer 23, and said oversheath 4 is wrapped in the outside of said outer conductor 3; Employing is formed as one the composite type insulating barrier by thin layer 21, foaming insulation layer 22 and outer thin layer 23 bondings in said; Thin layer 21 is bonding but peelable with said inner wire 1 in said, and this combining structure makes 21 of said inner wire 1 and the interior thin layers can be because of the bending of operation process and construction does not produce gap entering moisture and can effectively prevent said inner wire 1 oxidation with stretching, thereby ensures good and stable transmission quality; Said foaming insulation layer 22 also can not get into moisture, makes insulation property keep good, thereby has guaranteed the electric property of cable and stablizing of high-frequency transmission performance.
Said outer layer body 3 is an aluminium-plastic tape; Said aluminium-plastic tape comprises aluminium base and plastic cover; Said aluminum plastic composite belt longitudinal wraps in outer thin layer 23 peripheries of said composite type insulating barrier; In practical application, can select on request said aluminium base face outer or plastic cover outwardly, said aluminum plastic composite belt longitudinal bag overlaps to form puts up 31 places bonding.Said 31 the Duplication of putting up is greater than 18%.
Theoretical according to high-frequency transmission; Recomputate and designed the outer conductor screen and use plastic-aluminum combined carrying material; Its aluminium base thickness rises to 0.15～0.2mm by original 0.1mm, and the aluminium-plastic tape gross thickness is 0.25～0.35mm, guarantees the shielding result of carry high frequency frequency when 0.3MHz; Bandwidth increases by 2.5%～3%, and during vertical bag, said 31 the Duplication of putting up does not reveal the frequency transmission signal in 0.3MHz～3GHz frequency band greater than 18%, guarantees its laser propagation effect, and the external electromagnetic ripple can not improve cost performance from putting up intrusion.
The production technology of said a kind of coaxial cable may further comprise the steps: thin layer extruder in A) said inner wire 1 being fed; Extrude said interior thin layer 21 and encase said inner wire 1; Interior thin layer extruder is followed successively by the 150-170 degree by charging aperture to three sections temperature controls of extruding end, 160-180 degree, 165-185 degree; B) semi-finished product that encase said inner wire 1 by thin layer 21 in said are extruded said foaming insulation layer 22 with outer thin layer extruder common mode head and are encased said interior thin layer 21 apart from getting into the foaming insulation layer extruder through 1～1.5m; And extrude said outer thin layer 23 and encase said foaming insulation layer 22; Thin layer 21, said foaming insulation layer 22, said outer thin layer 23 encase said inner wire 1 from inside to outside successively in said; Form the composite type insulating barrier; Be wrapped on the take-up reel again; The foaming insulation layer extruder is followed successively by 155 ± 10 ℃, 160 ± 10 ℃, 175 ± 10 ℃, 185 ± 10 ℃, 175 ± 10 ℃, 165 ± 10 ℃, 165 ± 10 ℃ by charging aperture to seven sections temperature controls of extruding end, and outer thin layer extruder is followed successively by 165 ± 10 ℃, 175 ± 10 ℃, 180 ± 10 ℃ by charging aperture to three sections temperature controls of extruding end; C) said composite type insulating barrier encase the cable semi-finished product of said inner wire 1 and as the aluminium-plastic tape of outer conductor 3 through being arranged on the aluminum plastic composite belt longitudinal bag apparatus between pay off rack and the oversheath extruder; And the pottery that passes in the aluminum plastic composite belt longitudinal bag apparatus is indulged Bao Mo; Make said aluminium-plastic tape vertically encase said composite type insulating barrier, 31 places of putting up that overlap to form at vertical bag bond; The vertical Bao Mo of said pottery is placed on the vertical bag mould holder of said aluminum plastic composite belt longitudinal bag apparatus; D) the cable semi-finished product of the said aluminium-plastic tape 3 of vertical bag get into the jacket extrusion mould of sheath machine; Extrude said oversheath 4; Thereby form said a kind of coaxial cable, sheath machine is followed successively by 185 ± 5 ℃, 205 ± 5 ℃, 205 ± 5 ℃, 200 ± 5 ℃, 195 ± 5 ℃, 190 ± 5 ℃, 190 ± 5 ℃ by charging aperture to seven sections temperature controls of extruding end.
In the said coaxial cable production technology; Abandon existing metal die in the aluminum plastic composite belt longitudinal job contract preface; Indulge Bao Mo and manufacture and design pottery again; Not only the vertical bag of pottery mould price low (be merely existing common metal mould price 1/4th), life-span are long, and most importantly the vertical mould that wraps of pottery has high tenacity, high rigidity, high-wearing feature, also has the surface roughness that heat conductivity is low, self lubricity is good and fabulous (it is that fineness can reach ▽ more than 8 that the Ra grade reaches 0.8); Therefore, can produce the coaxial cable product of function admirable.
In the operation of the said plastic-aluminum combined mould of vertical bag; Can select plastic-aluminum combined mould aluminium base face outer or plastic cover outwardly, adopt the production technology of the utility model, saidly aluminium basely face outer or plastic cover all can be obtained good vertical bag effect outwardly; Like said aluminium base facing when outer; Aluminium base smooth guaranteed in its aluminium base the no marking damage of aluminium-plastic tape behind the vertical bag of the vertical bag of pottery mould, effectively improved the electric property and the high-frequency transmission performance of cable; The rate of breaking in the production is zero, improves product percent of pass; And speed of production fast (can reach 35m/min), production efficiency is high, has reduced production cost and product cost simultaneously, helps energy-conservation and environmental protection.
Vertical alclad plastic composite strip, extrude the continuous preheating apparatus of semi-finished product is arranged in the sheath operation, guarantee the mutual good bonding of half-finished each concentric layer of standard after this operation is accomplished aluminum plastic composite belt longitudinal bag and sheath, the vertical alclad plastic composite strip place of putting up bonding well.
The coaxial cable that the utility model provided can be used for main line, service main, the branch line in the cable TV transmission network network; Transmission cable TV image, sound, data message symbol also can be used for main line, service main, branch line transmission tone video information, data symbol of the wire transmission network of other impedance matching or the like.
The utility model can be widely used in coaxial cable field.
Claims (4)
1. coaxial cable; Comprise inner wire (1), outer conductor (3), oversheath (4); It is characterized in that: said a kind of coaxial cable also comprises the composite type insulating barrier; Said composite type insulating barrier comprises interior thin layer (21), foaming insulation layer (22), outer thin layer (23); Thin layer (21), foaming insulation layer (22), outer thin layer (23) are wrapped in the periphery of said inner wire (1) from inside to outside successively in said, and said outer layer body (3) is arranged on the periphery of said outer thin layer (23), and said oversheath (4) is wrapped in the outside of said outer conductor (3).
2. a kind of coaxial cable according to claim 1; It is characterized in that: said outer layer body (3) is an aluminium-plastic tape; Said aluminium-plastic tape comprises aluminium base and plastic cover; Said aluminum plastic composite belt longitudinal wraps in outer thin layer (23) periphery of said composite type insulating barrier, and bonding is located in put up (31) that said aluminum plastic composite belt longitudinal bag overlaps to form.
3. a kind of coaxial cable according to claim 2 is characterized in that: the Duplication of said putting up (31) is greater than 18%.
4. a kind of coaxial cable according to claim 2 is characterized in that: the thickness of said aluminium-plastic tape is 0.25～0.35mm, and said aluminium base face thickness is 0.15～0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202126082U CN202126873U (en) | 2011-06-22 | 2011-06-22 | Coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202126082U CN202126873U (en) | 2011-06-22 | 2011-06-22 | Coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202126873U true CN202126873U (en) | 2012-01-25 |
Family
ID=45489937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202126082U Expired - Fee Related CN202126873U (en) | 2011-06-22 | 2011-06-22 | Coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202126873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222545A (en) * | 2011-06-22 | 2011-10-19 | 珠海宇讯同轴电缆有限公司 | Coaxial cable and production process thereof |
-
2011
- 2011-06-22 CN CN2011202126082U patent/CN202126873U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222545A (en) * | 2011-06-22 | 2011-10-19 | 珠海宇讯同轴电缆有限公司 | Coaxial cable and production process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102222545A (en) | Coaxial cable and production process thereof | |
| US6384337B1 (en) | Shielded coaxial cable and method of making same | |
| EP1395997B1 (en) | Communications cable provided with a crosstalk barrier for use at high transmission frequencies | |
| CN101887779A (en) | Low-loss broadcasting coaxial cable and manufacturing method thereof | |
| CN107230525A (en) | Hyperfrequency cable for digital communication and preparation method thereof | |
| CN104821205A (en) | High-definition high-performance coaxial cable and preparation method thereof | |
| CN2632818Y (en) | Coaxial cables | |
| CN202126873U (en) | Coaxial cable | |
| CN201655350U (en) | Transponder data transmission cable | |
| CN204651027U (en) | A kind of spray dryer fire resistant electric wire | |
| CN201112006Y (en) | High shielding cable television cable | |
| CN212516681U (en) | High-reliability monitoring signal line | |
| CN107240744B (en) | Low-loss braided cable and manufacturing method thereof | |
| CN203312434U (en) | Radio frequency coaxial cable | |
| CN203377030U (en) | Improved coaxial cable | |
| CN202473348U (en) | Two-core data cable used for rail haulage motor | |
| CN2655390Y (en) | Coaxial cable | |
| CN101702339A (en) | High-shielding audio and video information combined cable | |
| CN105070360A (en) | smooth outer conductor coaxial cable and production technology thereof | |
| CN111799040A (en) | Foaming process for insulating layer in coaxial cable | |
| CN202384057U (en) | Braided armored coaxial cable | |
| CN109003710A (en) | A kind of low latency difference high-speed transfer cable and preparation method | |
| CN211319761U (en) | Communication shielded cable | |
| CN204857212U (en) | Shielding of zinc -plating copper wire and control tension cable | |
| CN112447320A (en) | Flat cable and processing technology thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20200622 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |