CN207149292U - A kind of half firm type radio frequency coaxial-cable of thin-walled with embossing structure - Google Patents
A kind of half firm type radio frequency coaxial-cable of thin-walled with embossing structure Download PDFInfo
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- CN207149292U CN207149292U CN201720519559.4U CN201720519559U CN207149292U CN 207149292 U CN207149292 U CN 207149292U CN 201720519559 U CN201720519559 U CN 201720519559U CN 207149292 U CN207149292 U CN 207149292U
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Abstract
The utility model discloses a kind of just type radio frequency coaxial-cable, including inner wire, insulator layer and the outer conductor layer set gradually from the inside to the outside of thin-walled with embossing structure half, the wall thickness of described outer conductor layer is 0.08~0.50mm；Rolling has micro- embossing in described outer conductor layer；Described micro- embossing depth is 0.15~0.3 times of the wall thickness of outer conductor layer.The construction of cable of the present utility model can be applied to path cable, outer conductor layer and the frictional force of insulator layer be added, so as to improve the adhesive force between insulator layer and outer conductor layer.And the mechanical strength of cable is taken into account while adhesive force is improved.Embossing in outer conductor layer of the present utility model is micro- embossing, suitable for thin-walled cable, embossing depth as shallow, mechanical strength can be ensured, and the adhesive force requirement between insulator layer and outer conductor layer is met simultaneously, cable performance is good, and the confining force and frequency of use of cable are significantly larger than existing cable.
Description
Technical field
The utility model belongs to the communications field, is related to half firm type radio frequency coaxial-cable, and in particular to one kind carries embossing knot
Half firm type radio frequency coaxial-cable of the thin-walled of structure.
Background technology
With microwave telecommunication devices integrated level more and more higher, machine system is also more next to the electromagnetic exposure requirements of radio-frequency cable
Higher, half firm type radio frequency coaxial-cable due to there is continuous outer conductor structure there is optimal shielding properties and the outer of minimum to lead
Body is lost, and higher uses preferable electrical performance indexes in band limits and full frequency band, thus is widely used.Except this it
Outside, in mechanical properties, there is stronger tensile strength and bend fixed-type property.But half firm type RF coaxial is electric at present
There is a common problem in cable, be exactly that cable insulator during bending can shrink, or after high/low temperature circulation work is carried out
Insulator also can shrink or grow phenomenon because of the lower appearance of the effect of expanding with heat and contract with cold, and insulator core pulling problem easily occurs in stub cable.This
Utility model is exactly the problem of increase outer conductor is with insulator adhesive force by new structure.
At present, existing embossing structural cable is a kind of ripple radio frequency coaxial-cable, and its structure is generally protective polyethylene
Set, annular wrinkle copper or aluminum pipe outer conductor, insulator use polyethylene foam, and inner wire is Copper-Aluminum compound body or pure copper material.
In the prior art, the sheath of embossing structural cable uses low temperature extrusion moulding, and outer conductor uses copper strips or the rolling device of aluminium strip
Wound, then commissure progress argon arc welding is become into closed circle tubular outer conductor, through fixing mould and traction
Be made fixed knot away from and Wave crest and wave trough bellows, insulator using polyethylene foam technology producing foamed insulator,
Inner wire is generally hollow or solid copper pipe and aluminium pipe structure.
At present in the high-grade, precision and advanced technical field such as Aero-Space, military radar and weaponry, radio frequency coaxial-cable is made
High with frequency requirement, existing corrugated coaxial cable can only produce larger external diameter cable, and general diameter is in more than 6mm.
The content of the invention
In view of the deficienciess of the prior art, the purpose of this utility model is, there is provided a kind of thin with embossing structure
The just type radio frequency coaxial-cable of wall half, solve existing corrugated coaxial cable structure and be difficult to be applied to small external diameter cable and existing
The skill that corrugated coaxial cable is difficult to take into account to mechanical strength of the adhesive force between outer conductor layer and insulator layer in cable in itself
Art problem.
In order to solve the above-mentioned technical problem, the utility model, which adopts the following technical scheme that, is achieved：
A kind of just type radio frequency coaxial-cable of thin-walled with embossing structure half, including lead in setting gradually from the inside to the outside
Body, insulator layer and outer conductor layer, the wall thickness of described outer conductor layer is 0.08~0.50mm；
Rolling has micro- embossing in described outer conductor layer；
Described micro- embossing depth is 0.15~0.3 times of the wall thickness of outer conductor layer.
The utility model also has following distinguishing feature：
The head number of described micro- embossing is 2~3, and the phase difference between micro- embossing is 60 °~180 °.
The embossing lift angle of described micro- embossing is 5~10 °, and the embossing pitch of micro- embossing is in 0.05~4.0mm.
The external diameter of described outer conductor layer is less than 6mm.
The cross sectional shape of described micro- embossing is semicircle, trapezoidal or waveform.
Described inner wire is made of silver-plated circular copper wire and silver-copper plated steel clad wire.
Described insulator layer is made of polytetrafluoroethylene (PTFE).
Described outer conductor layer is made of seamless copper tube or seamless aluminium tubing.
The utility model compared with prior art, has the following technical effect that：
The construction of cable of the present utility model can be applied to path cable, add the friction of outer conductor layer and insulator layer
Power, so as to improve the adhesive force between insulator layer and outer conductor layer.And cable is taken into account while adhesive force is improved
Mechanical strength.
Embossing in outer conductor layer of the present utility model is micro- embossing, suitable for thin-walled cable, embossing depth as shallow, Neng Goubao
Mechanical strength is demonstrate,proved, and meets the adhesive force requirement between insulator layer and outer conductor layer simultaneously, cable performance is good, the guarantor of cable
Holding force and frequency of use are significantly larger than existing cable.
Either greatest differences all be present in the construction of cable, production technology and using field in existing bellows cable.This reality
With it is new be by carrying out faint embossing to cable outer conductor, develop a kind of new embossing structural cable, solve at present half just
The adhesion problem of type RF coaxial cable insulation cable body and outer conductor, it is allowed to have surely in mechanical bend and extreme-temperature environment
Fixed electrical property and mechanical performance, so as to ensure wired signal transmission accuracy.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Fig. 2 is that cross sectional shape is semicircular micro- embossing structural representation.
Fig. 3 is that cross sectional shape is trapezoidal micro- embossing structural representation.
Fig. 4 is that cross sectional shape is corrugated micro- embossing structural representation.
The implication of each label is in figure：1- inner wires, 2- insulator layers, 3- outer conductor layers, the micro- embossing of 4-.
Explanation is further explained in detail to particular content of the present utility model with reference to embodiments.
Embodiment
Specific embodiment of the utility model given below is, it is necessary to which explanation is that the utility model is not limited to following tool
Body embodiment, all equivalents done on the basis of technical scheme each fall within the scope of protection of the utility model.
Embodiment：
As shown in figure 1, the present embodiment provides a kind of just type radio frequency coaxial-cable of thin-walled with embossing structure half, including by
It is interior to the inner wire 1, insulator layer 2 and outer conductor layer 3 that set gradually outside, the wall thickness of described outer conductor layer 3 for 0.08~
0.50mm；
Rolling has micro- embossing 4 in described outer conductor layer 3；
The described depth of micro- embossing 4 is 0.15~0.3 times of the wall thickness of outer conductor layer.
The head number of micro- embossing 4 is 2~3, and the phase difference between micro- embossing 4 is 60 °~180 °, and the head number of micro- embossing 4 is
The bar number of embossing line, a plurality of micro- embossing 4 are laid out with the phase difference of the present embodiment, can not only increase the confining force of cable, simultaneously
The electrical performance indexes of cable are not interfered with yet.
The embossing lift angle of micro- embossing 4 is 5~10 °, and the embossing pitch of micro- embossing 4 is in 0.05~4.0mm.The present embodiment is logical
Cross embossing fixture and carry embossing lift angle, in fixture rotary course, the outer conductor layer 3 of cable is rolled automatically under the effect of embossing lift angle
Line, this kind of mode only need embossing fixture to rotate, easy to operate, pitch is stable, compared to large-scale bellows electricity without tractive force
Its is operable with stronger for cable, and technical process is simpler.
The external diameter of outer conductor layer 3 is less than 6mm, can do 5mm, 4mm and 3mm etc. some row sizes, is small external diameter cable
Or mini-cable.Existing outer conductor of corrugated tube wall thickness is typically all in more than 0.5mm, the wall thickness of the outer conductor layer 3 of the present embodiment
0.08~0.50mm, it is 0.08~0.45mm that can be optimized to wall thickness.
As shown in Figures 2 to 4, the cross sectional shape of micro- embossing 4 is semicircle, trapezoidal or waveform.
Existing corrugated cable inner wire typically uses Copper-Aluminum compound tubular construction, and the inner wire 1 of the present embodiment is using silver-plated
Circular copper wire and silver-copper plated steel clad wire are made, and reduce the surface of inner wire 1 and are lost because of caused by Kelvin effect.
Existing corrugated cable insulation is polyethylene foam, and temperature resistant grade is relatively low, can typically up to bear 90 DEG C of high temperature, melting
Into liquid easily flowing under state, short time high temperature effect can not be born.The insulator layer 2 of the present embodiment uses polytetrafluoroethylene (PTFE)
It is made.Specifically there are following three kinds.
(A) low-k PTFE, using dispersion PTFE resin, add that 20% solvent naphtha is agitated fully to carry out pressure embryo,
Cylindric dispensing is formed, is formed through pushing, sintering, its dielectric constant 1.9 or so, is reduced compared to normal FTFE dielectric constants 2.1
0.2~0.3, it both can guarantee that it had very high intensity, and also reduced the loss in signals transmission.With for a long time 200
DEG C high temperature normal work, short time can be used in 250 DEG C, 327 DEG C of melting temperature, the characteristics such as melting is not flowed, the height in the short time
Temperature does not influence the transmission of its signal.
(B) raw material stretching PTFE, early stage, production was essentially identical with low-k PTFE, and drawn is made during pushing
With so that interior molecules fibrosis, through low-temperature sintering, solvent naphtha volatilization, inside can uniformly fill air, the dielectric constant of air
1.0, the insulator is air blending agent, dielectric constant 1.65 or so.
(C) low density PTFE Transposed wind structure, after multilayer is wrapped, dielectric constant can drop to low density PTFE film
1.45, it has excellent temperature phase stability, and PPM values are 700 or so.
Existing outer conductor of corrugated tube uses one fixed width copper strips and aluminium strip, and rolling device carries out being wound into tubulose, through argon
Arc-welding welds joint close to form tubular outer conductor, and the outer conductor layer 3 of the present embodiment is made of seamless copper tube or seamless aluminium tubing,
It requires no soldering.
Embossing depth：The Wave crest and wave trough and embossing pitch, depth that existing bellows cable general provision is fixed typically exist
More than 1.0mm, the depth of micro- embossing 4 of the present embodiment is 0.15~0.3 times of the wall thickness of outer conductor layer, and the wall of outer conductor layer 3
Thickness is 0.08~0.50mm, and substantially all semi-rigid cables are all adapted in below 0.10mm, the structure, utilizes embossing method energy
Effectively increase cable insulation and outer conductor confining force, the cable retention through testing the present embodiment can reach more than 70N, existing ripple
The confining force of line pipe cable and semi-rigid cable is 2~3 times of existing cable typically in 15~30N.
Cable frequency of use：Existing bellows cable due to the limitation of production technology, can only produce wall thickness 0.5mm with
On, the outside diameter of cable is in more than 6.0mm thick cable, and within 6GHz, the diameter of the cable of the present embodiment exists general frequency of use
Below 6.0mm, wall thickness is that 0.08~0.50mm cable can also realize embossing, not only to insulator and the adhesive force of outer conductor
Effectively lifted, while frequency of use highest can reach 65GHz, be 10 times of existing bellows cable.
The specific production procedure of half firm type radio frequency coaxial-cable of thin-walled of the present utility model with embossing structure is as follows：
Step 1, push or wrapped：Push and it is wrapped be the conventional insulator production of current high-performance radio-frequency coaxial cable
Technique, pushing are that mass fraction is added in a kind of PTFE resin that will be scattered as 20% solvent naphtha, are fully mixed, then
More than 24 hours are stood, solvent naphtha mutually can be thoroughly absorbed with PTFE resin and merges, then through pressing embryo circlewise cylinder, will
The embryo material pressed, which is sent into, to be pushed in cylinder barrel, and by the extruding of stabilized speed, when by conical die core set, it is homogeneous to form external diameter
Concentric insulator structure, the present embodiment uses the general 2.0~5.50mm in die sleeve aperture, core rod diameter typically 0.5~
2.0mm, extrusion outer insulation diameter is typically in 1.90~5.0mm.And wrapped class insulator is then by certain thickness and width
PTFE films, the wrapped insulator production technology for obtaining design size and requiring is put up by carrying out multilayer, the technique is inapplicable to burn
Tie process.The use of more film thickness is at present 0.035/0.076/0.152/0.254mm, the width of film can be according to work
Skill requires to cut different width.
Step 2, sintering：Sintering process be produce low-k PTFE (i.e. polytetrafluoroethylene (PTFE)) significant process, raw material
Stretching PTFE media are dried at a temperature of 120 DEG C, solvent naphtha is volatilized as far as possible, are then placed in baking oven and carry out 300 DEG C of burnings
Knot, ensure that molecular chain structure is stable.Low-k PTFE media are exhausted between solid medium and raw material drawing medium
Edge material, for its sintering temperature at 350 DEG C or so, dielectric constant 1.90 after the completion of sintering, the medium has high mechanical strength, high temperature
The characteristics of coefficient of expansion is small, and dielectric constant is low.
Step 3, trombone slide：Tube-pulling craft is that the insulator for pushing the insulator sintered or Transposed wind is penetrated into one
In the copper pipe or aluminum pipe of set aperture, the wire drawing grinding tool through fixed dimension, through drawing drawing, form insulator and outer conductor inwall
Interference fits, ensure the uniformity of the adhesive force and outer conductor external diameter between insulator and outer conductor, to the one of rear road embossing
Cause property important role.There are 2.18 ± 0.01mm, 3.58 ± 0.01mm, 6.00 ± 0.01mm in conventional wire drawing die aperture, passes through
The outside diameter of cable that trombone slide is produced can ensure tolerance within 0.02mm.
Step 4, embossing：Embossing process is production process key process, and cable after trombone slide is pressed from both sides by fixed embossing
Tool, this technique is different from bellows embossing technique, and bellows is the life under the traction of setting by embossing fixture and draw
Into fixed knot away from ripple.According to recording above, the present embodiment is to carry embossing lift angle by embossing fixture, and micro- embossing 4 rolls
Line lift angle is 5~10 °, and the embossing pitch of micro- embossing 4 is in 0.05~4.0mm.In fixture rotary course, the outer conductor layer of cable
3 under the effect of embossing lift angle automatic embossing, this kind of mode only needs embossing fixture to rotate without tractive force, easy to operate, section
Away from stable, compared to large-scale bellows cable, its is operable with stronger, and technical process is simpler.
Step 5, post processing：Cable is after trombone slide and embossing process, because trombone slide and embossing process produce to insulator
Extruding so that cable built-in electrical insulation internal stress can not discharge, and outer conductor can also should be cold pressing effect and produce flow harden, to synthesis
Mechanical performance can have an impact, so cable need to carry out 60 DEG C or so of a high temperature destressing after embossing, possess cable good
Good mechanical stability.
Claims (4)
- A kind of 1. just type radio frequency coaxial-cable, including the inner wire set gradually from the inside to the outside of thin-walled with embossing structure half (1), insulator layer (2) and outer conductor layer (3), it is characterised in that the wall thickness of described outer conductor layer (3) be 0.08~ 0.50mm；Rolling has micro- embossing (4) in described outer conductor layer (3)；Described micro- embossing (4) depth is 0.15~0.3 times of the wall thickness of outer conductor layer；The head number of described micro- embossing (4) is 2~3, and the phase difference between micro- embossing (4) is 60 °~180 °；The embossing pitch of described micro- embossing (4) is in 0.05~4.0mm；The external diameter of described outer conductor layer (3) is less than 6mm；The cross sectional shape of described micro- embossing (4) is semicircle, trapezoidal or waveform.
- 2. half firm type radio frequency coaxial-cable of the thin-walled with embossing structure as claimed in claim 1, it is characterised in that described Inner wire (1) is made of silver-plated circular copper wire and silver-copper plated steel clad wire.
- 3. half firm type radio frequency coaxial-cable of the thin-walled with embossing structure as claimed in claim 1, it is characterised in that described Insulator layer (2) is made of polytetrafluoroethylene (PTFE).
- 4. half firm type radio frequency coaxial-cable of the thin-walled with embossing structure as claimed in claim 1, it is characterised in that described Outer conductor layer (3) is made of seamless copper tube, seamless aluminium tubing or gapless stainless steel tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720519559.4U CN207149292U (en) | 2017-05-11 | 2017-05-11 | A kind of half firm type radio frequency coaxial-cable of thin-walled with embossing structure |
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| CN201720519559.4U CN207149292U (en) | 2017-05-11 | 2017-05-11 | A kind of half firm type radio frequency coaxial-cable of thin-walled with embossing structure |
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| CN207149292U true CN207149292U (en) | 2018-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349697A (en) * | 2019-06-11 | 2019-10-18 | 神宇通信科技股份公司 | A kind of insulated conductor and its production technology with double layer of insulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349697A (en) * | 2019-06-11 | 2019-10-18 | 神宇通信科技股份公司 | A kind of insulated conductor and its production technology with double layer of insulation |
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