CN106299569B - A kind of waterproofing type radio frequency coaxial-cable and its manufacture craft - Google Patents
A kind of waterproofing type radio frequency coaxial-cable and its manufacture craft Download PDFInfo
- Publication number
- CN106299569B CN106299569B CN201610738241.5A CN201610738241A CN106299569B CN 106299569 B CN106299569 B CN 106299569B CN 201610738241 A CN201610738241 A CN 201610738241A CN 106299569 B CN106299569 B CN 106299569B
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- cable
- aluminum pipe
- radio frequency
- frequency coaxial
- core wire
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/06—Coaxial lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
- H01P11/005—Manufacturing coaxial lines
Abstract
The invention discloses a kind of waterproofing type radio frequency coaxial-cable and its manufacture crafts, the cable is set gradually from inside to outside as cable inner conductor, insulating layer, outer conductor and protective layer, the wherein described outer conductor is made of aluminium bar is squeezed, the aluminium bar passes through continuously extruded formation aluminum pipe, using techniques such as stretching, cooling, embossing, the specific steps are：Make blank using two aluminium bars first, is oriented to by aligning, alkali cleaning, drying, strength is sent into machine at normal temperatures, sensing heating is segmented using Medium frequency induction circle after entering machine, then extruding is homogenized with the high carbon steel material screw rod of intensity, barrel；And then shunting splice grafting is carried out, and aluminum pipe in homogeneous thickness is formed, it is stretched, it is quickly cooled down using by the pure water of low-temperature treatment when being coated on core wire surface with gap, and coating, then embossing.The present invention solve weld seam solder skip infiltration to radio frequency coaxial-cable in water long-play when insulation performance influence, with good block-water effect and social benefit.
Description
Technical field
The present invention relates to radio frequency coaxial-cable product and its manufacture crafts in communication transmission field, specifically waterproofing type radio frequency
The outer conductor of coaxial cable and its manufacture craft, the cable is squeezed into aluminum pipe manufacture craft using aluminium bar, and protective layer uses water repellent
Macromolecule polymeric material is given as security extruding process through molding and is made, and a kind of RF coaxial electricity for being laid in and being used for a long time in water is finally made
Cable.Such cable may be applicable to transmit the special occasions of signal of communication in water, can be widely applied to mine, cabin, hidden
Covering property underwater facility and common communications base station underground piping, trough etc. have the closure regional space signal of communication that water covers
Transmission.
Background technology
Radio frequency coaxial-cable is also referred to as feeder line, be a kind of cable inner wire and outer conductor on same axle center, in inner wire
The communication cable of signal is transmitted between outer conductor.The insulating layer of radio frequency coaxial-cable is the stabilization for ensureing internal and external conductor structure,
It is also the medium of high frequency signal transmission, thus the dielectric constant of insulating materials is smaller, is more conducive to reduce high-frequency electromagnetic signal
Transmission attenuation.When cable laying is in the environment for having water, radio frequency coaxial-cable with water due to contacting for a long time so that hydrone is saturating
It crosses cable shield and outer conductor gradually leaks into insulating layer, the signal transmission performance of cable continuously decreases.
The outer conductor use welding embossing or longitudinal wrap gluing technique of existing conventional RF coaxial cable and gathering for outer jacket
Ethylene or halogen-free and low-smoke flame-retardant polyolefin material, all it cannot be guaranteed that when cable is laid in underwater environment for a long time, in insulating layer
It is non-leakage into hydrone, and then influence the transmission performance of cable.Argon arc welding embossing or longitudinal wrap gluing gap are easy cracking, outer conductor
The width of joint, thin and thick, joint intensity do not accomplish uniformity, in routinely production technology, do not accomplish outer lead also
The performance requirement of radial water-resisting is not achieved in the seamless combination of body, cable.The polyethylene sheathing material that outer jacket uses is although in sky
Water imbibition is relatively low in gas or in steam, but cable long period of soaking just has hydrone leakage and enters in water.Cable is grown in water
Insulative dielectric constant can gradually increase when phase runs, and attenuation constant gradually increases, and signal transmission performance gradually weakens, and arrive certain journey
In the case of degree equipment cannot normal operation, cable is not achieved design life and just needs to scrap replacement, gives the production of people
Life brings great inconvenience.
Invention content
In order to which the process structure and its performance that overcome above-mentioned radio frequency coaxial-cable are insufficient, and can be by its prolonged application in underwater
In the environment of laying, the present invention provides a kind of waterproofing type radio frequency coaxial-cable and its manufacture crafts.
The technical solution adopted by the present invention is that：A kind of waterproofing type radio frequency coaxial-cable and its manufacture craft, the cable is from interior
It is set gradually to outer as cable inner conductor, insulating layer, outer conductor and protective layer, the outer conductor is made of aluminium bar is squeezed, should
Aluminium bar passes through continuously extruded formation aluminum pipe, using techniques such as stretching, cooling, embossing, the specific steps are：Two aluminium are used first
Bar makees blank, is oriented to by aligning, alkali cleaning, drying, strength is sent into machine at normal temperatures, Medium frequency induction is used after entering machine
Circle segmentation sensing heating, then it is homogenized extruding with the high carbon steel material screw rod of intensity, barrel；And then shunting splice grafting is carried out,
Aluminum pipe in homogeneous thickness is formed, it is stretched, using by the pure of low-temperature treatment when being coated on core wire surface with gap, and coating
Water purification is quickly cooled down, then embossing.
The aluminium bar is squeezed into seamless pipe through continuous high temperature, and core wire surface is closely coated on using stretching, wherein
Extrusion cladding aluminum pipe technique is carried out under the semi-molten state of aluminium, and to avoid scald core wire surface, control in production squeezes
The ceramic material equipment inner core for being reserved with larger gap between cladding aluminum pipe and core wire, while selecting the coefficient of heat conduction small
Pipe reduces heat conduction velocity.
Using the dry gas Jing Guo sub-cooled at mould outlet, table in aluminum pipe is cooled down by tube core hollow structure
Face, while a set of water spray external cooling device is additionally provided at mould outlet, it is squeezing out outside aluminum pipe using a large amount of pure
Water is quickly cooled down, it is ensured that core wire surface is not burned.
The protective layer is made of hot melt adhesive water-proof material, and processing technology is to use maleic anhydride modified ethylene tree
Fat, acrylate, butyl rubber high molecular material are polymerized, and give as security extruding process system through molding by the way of high-temperature heating
At.
The beneficial effects of the invention are as follows：
The one-pass molding of this technique can realize continuous seamless connection truly, in production process the consumption energy it is low,
Speed is fast, quantum of output is high, stock utilization is high, compared with traditional aluminium strip longitudinal wrap welding embossing cladding process, continuously extruded packet
Covering product has the seamless non-leakage, significant advantages such as overall cost is low.Aluminum pipe sealing performance is excellent, reaches the good effect that blocks water
Fruit is a new process for optimizing aluminium strip welding embossing or longitudinal wrap gluing technique manufacture radio frequency coaxial-cable outer conductor.
The continuous high temperature extrusion process that this technique uses, since aluminum metal atom crystal grain is homogenised for, mechanical performance is uniform, protects
It is all being radially and longitudinally uniformity to have demonstrate,proved metal embossing aluminum pipe outer conductor mechanical performance.Product thickness is uniform, electric after embossing
Cable bending property is good.
The dry air Jing Guo sub-cooled is arranged in this technique at mould outlet, is passed through tube core hollow structure and forces cooling
Aluminum pipe inner surface is provided with a set of special water spray external cooling device at aluminum pipe mould outlet, the aluminum pipe of extrusion is made to pass through
Die orifice is quickly cooled to 60 DEG C or so at a temperature of being in up to 560 DEG C, to protect core insulation not to be burned.
Using protective layer made of hot melt adhesive water repellent new material, processing technology uses maleic anhydride modified ethylene tree
Fat, acrylate, butyl rubber high molecular material are polymerized, and giving as security extruding process through molding in the way of high-temperature heating is made.
Above-mentioned technique effectively prevents water and steam to penetrate into cable insulation and destroy the construction of cable and electric property, ensure that
The service life of product.
Description of the drawings
Fig. 1 is a kind of waterproofing type radio frequency coaxial-cable cross-sectional structure schematic diagram of the present invention.
Fig. 2 is a kind of waterproofing type radio frequency coaxial-cable vertical section structure schematic diagram of the present invention.
In figure：1- inner wires, 2- insulating layers, 3- outer conductors, 4- protective layers.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of waterproofing type radio frequency coaxial-cable, the construction of cable set gradually from inside to outside for：Electricity
Insulating layer 2 is arranged outside cable inner conductor 1 for cable inner wire 1, and outer conductor 3 is arranged outside insulating layer 2, protective layer 4 is arranged outside outer conductor 3.
By aluminium bar by continuously extruded, stretching, cooling, embossing form the wherein described outer conductor 3；Double aluminium bars used in it pass through at normal temperatures
Aligning, alkali cleaning, drying, strength guiding feeding machine are crossed, is squeezed using Medium frequency induction heat stepwise after entering machine, use is high-strength
Degree carbon steel material screw rod, barrel are homogenized extruding, then shunt splice grafting, form aluminum pipe in homogeneous thickness using drawing gap
It is coated on core wire surface, when cladding is quickly cooled down using a large amount of air and water, then embossing.
Extruded aluminum tube technique is that aluminium carries out under semi-molten state, and extrusion temperature is up to 560 DEG C, due to technology controlling and process journey
Sequence is rigorous, will not cause to scald to the core wire surface in aluminum pipe.Aluminum pipe extrusion process is instead of current common argon arc welding welding
Embossing technique or longitudinal wrap gluing technique：One side extruded aluminum tube process seal effect is good, and there is no welding holes and glued gap
Infiltration immersion phenomenon, the solder joint for also having prevented embossing generation snaps and glued gap is bent spreading phenomenon；On the other hand general
Logical macromolecule polymeric material cannot block water completely, and hydrone radius is about 0.25nm, between common macromolecule polymeric material molecule
Gap is typically greater than 1nm, and the excessively high molecular gap infiltration of hydrone very permeable is entered.And aluminum metal atom no matter monocrystalline or more
Gap is both less than 0.1nm between crystal structure atom, and hydrone cannot permeate by aluminum metal atom gap.Polyethylene
Although molecular material has the characteristics that water imbibition is small, be usually used in the jacket material of water repellent electric cable, but polyethylene molecule material for
Hydrone has anti-" filterability ", not anti-" permeability ", this is to say polyethylene molecule material energy short time guarantee hydrone
It will not leak, and cannot be guaranteed hydrone will not penetrate into polyethylene molecule material for a long time.For cable water preventing ability
Can it is more demanding in the case of, it is necessary to water blocking layer is sealed using metal material, to penetrate into cable exhausted in this way, just having prevented hydrone
The insulation resistance of radio frequency coaxial-cable is caused to be gradually reduced in edge layer, attenuation constant gradually increases phenomenon, improves cable and answers
Stability extends cable service life.
In addition, aluminum metal atom in process of setting, is carried out along with shifting ground, atom crystal grain is refined homogeneous, aluminum pipe
Clad mechanical performance is in radially and longitudinally uniformity.Extrusion cladding aluminum pipe technique is carried out under the semi-molten state of aluminium
, extrusion temperature is up to 560 DEG C, and improper process control can then scald core wire surface in production, and cable section performance parameter is made to meet with
To destruction.In order to avoid scald core wire surface, need to control in production be reserved between extrusion cladding aluminum pipe and core wire it is larger
Gap, the mode of heating to improve equipment, the ceramic material equipment inner core tube for selecting the coefficient of heat conduction small, to reduce hot biography
Lead speed.Using the dry gas Jing Guo sub-cooled at mould outlet, aluminum pipe inner surface is cooled down by tube core hollow structure.
It squeezes out and is quickly cooled down using a large amount of pure water outside aluminum pipe, it is ensured that core wire surface is not burned.
Using protective layer made of hot melt adhesive water-proof material newly formula, protective materials is maleic anhydride modified ethylene tree
Fat, acrylate, butyl rubber macromolecule polymeric material are polymerized in the way of high-temperature heating through molding signature extruding process.
Above-mentioned technique effectively prevents water and steam to penetrate into and destroys the construction of cable and electric property in cable insulation, ensure that production
The service life of product.
The present invention, using the dry air Jing Guo sub-cooled, is passed through tube core hollow structure and forces cooling at mould outlet
Aluminum pipe inner surface, to prevent core wire from being scalded at mould outlet；It is also provided at mould outlet outside a set of special water spray
Cooling device is quickly cooled to 60 DEG C or so, to protect at a temperature of so that the aluminum pipe of extrusion is up to 560 DEG C at by die orifice
Core wire surface is not burned.
Complete equipment application microcomputer digitization procedure automatically controls production, and design coats special control software, according to aluminum pipe
The position of extruded velocity and signal swing rod automatically adjusts crawling traction speed, carries out aluminum pipe stretching, accurately controls aluminum pipe and squeezes out speed
Degree is consistent with tensile speed, it is ensured that properties of product are stablized.
The present invention provides one for the development and application of radio frequency coaxial-cable in water and opens one's minds, and has preferable society
Benefit.Inside radio frequency coaxial-cable manufacturer now, the almost nil of no solder skip can be accomplished using argon arc welding production technology,
So, the radio frequency coaxial-cable of argon arc welding technique production bad using the radio frequency coaxial-cable block-water performance that argon arc welding technique produces
The polyethylene sheathing material that sheath uses blocks water, but can not be fully solved the solder skip infiltration of weld seam insulating properties when being run to cable
The influence of energy.
It is the embodiment in conjunction with Fig. 1 and Fig. 2 above, example explanation and helping further understands the present invention, but embodiment
Details does not represent whole technical solutions under present inventive concept merely to illustrate the present invention, therefore should not be construed as to this
Invent the restriction of total technical solution.In some technical staff, changed without departing from the unsubstantiality of present inventive concept, such as
Simply change or replace with the technical characteristic with same or similar technique effect, the scope of the present invention should all be belonged to.Above
The embodiment described is only that the preferred embodiment of the present invention is described, and is not carried out to the spirit and scope of the present invention
It limits, under the premise of not departing from design concept of the present invention, ordinary engineering and technical personnel is to technical scheme of the present invention in this field
All variations and modifications are made, protection scope of the present invention should all be fallen into, the claimed technology contents of the present invention are whole
It records in detail in the claims, part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (4)
1. a kind of waterproofing type radio frequency coaxial-cable manufacture craft, the cable are set gradually from inside to outside as cable inner conductor（1）, absolutely
Edge layer（2）, outer conductor（3）And protective layer（4）, it is characterised in that：The outer conductor（3）It is made of aluminium bar is squeezed, aluminium bar warp
Continuously extruded formation aluminum pipe is crossed, using stretching, cooling, embossing technique, the specific steps are：Make base using two aluminium bars first
Material is oriented to by aligning, alkali cleaning, drying, strength is sent into machine at normal temperatures, is segmented using Medium frequency induction circle after entering machine
Sensing heating, then it is homogenized extruding with the high carbon steel material screw rod of intensity, barrel；And then shunting splice grafting is carried out, it is formed thick
Uniform aluminum pipe is spent, it is stretched, using fast by the pure water of low-temperature treatment when being coated on core wire surface with gap, and coating
Quickly cooling but, then embossing.
2. a kind of waterproofing type radio frequency coaxial-cable manufacture craft according to claim 1, it is characterised in that：The aluminium bar warp
Continuous high temperature is squeezed into seamless pipe, using drawing gap is coated on core wire surface, and wherein extrusion cladding aluminum pipe technique is
It carries out under the semi-molten state of aluminium, to avoid scald core wire surface, controls between extrusion cladding aluminum pipe and core wire in production
The ceramic material equipment inner core tube for being reserved with larger gap, while selecting the coefficient of heat conduction small reduces heat conduction velocity.
3. a kind of waterproofing type radio frequency coaxial-cable manufacture craft according to claim 1, it is characterised in that：In mould outlet
Place cools down aluminum pipe inner surface using the dry gas Jing Guo sub-cooled, by tube core hollow structure, while at mould outlet
It is additionally provided with a set of water spray external cooling device, is quickly cooled down using a large amount of pure water outside aluminum pipe squeezing out, it is ensured that core wire
Surface is not burned.
4. a kind of waterproofing type radio frequency coaxial-cable manufacture craft according to claim 1, it is characterised in that：The protective layer
（4）It is made of hot melt adhesive water-proof material, processing technology is using maleic anhydride modified vinyl, acrylate, fourth
Base elastomeric polymeric material is polymerized, and gives as security extruding process through molding by the way of high-temperature heating and be made.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610738241.5A CN106299569B (en) | 2016-08-29 | 2016-08-29 | A kind of waterproofing type radio frequency coaxial-cable and its manufacture craft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738241.5A CN106299569B (en) | 2016-08-29 | 2016-08-29 | A kind of waterproofing type radio frequency coaxial-cable and its manufacture craft |
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| Publication Number | Publication Date |
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| CN106299569A CN106299569A (en) | 2017-01-04 |
| CN106299569B true CN106299569B (en) | 2018-10-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830332B (en) * | 2019-02-21 | 2020-05-26 | 苏州冠韵威电子技术有限公司 | Intermediate frequency coaxial cable and preparation method thereof |
| CN113436810A (en) * | 2021-06-29 | 2021-09-24 | 绍兴市世航电子线缆有限公司 | Production process of CATV540 seamless aluminum pipe coaxial cable |
| CN113724943B (en) * | 2021-08-11 | 2023-09-26 | 广东速联科技术股份有限公司 | Semi-rigid cable manufacturing process and semi-rigid cable |
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| CN1901104A (en) * | 2006-07-21 | 2007-01-24 | 朱水良 | Method for producing cable aluminum sheath |
| CN201887140U (en) * | 2010-07-15 | 2011-06-29 | 中天日立射频电缆有限公司 | 7/8 copper-aluminum composite pipe radio frequency coaxial cable |
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| CN106299569A (en) | 2017-01-04 |
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