A kind of copper tube inner conductors for radio-frequency cable
Technical field
This utility model relates to the radio-frequency cable of communications, especially a kind of leads in the copper pipe of radio-frequency cable
Body, belongs to technical field of communication equipment.
Background technology
Radio-frequency cable is mainly used in the transmission of radiofrequency signal, radio-frequency cable have using temperature range width, usage frequency high,
The low, standing-wave ratio of decay is little and the excellent properties such as advantages of good shielding performance, is therefore widely used in communication system, microwave measurement system
The field such as system and instrument and meter.Radio-frequency cable in the market generally includes inner wire, and inner wire is hollow copper pipe,
It is cased with insulated sleeve, such as polyethylene layer outside inner wire, be cased with copper strips etc. outside insulated sleeve, be also cased with outside copper strips
Plastic protective layer.As can be seen that the layer of structure of radio-frequency cable to be comparison many, but due to needing the peace in view of radio-frequency cable
The technical specifications such as dress, the convenience connecting and communication quality, the entire outer diameter of radio-frequency cable must control in specific scope
Interior it is impossible to too big, the thus making to radio-frequency cable, the making of the particularly inner wire of radio-frequency cable innermost end proposes relatively
High requirement.Now currently used for the inner wire of radio-frequency cable, it is the copper pipe structure using inner wall smooth mostly, due to copper pipe itself
Material is relatively soft, therefore is not easy to be bent impact communication quality to ensure copper pipe, the wall thickness of now current copper pipe all does
Relatively large, the overall weight which results in copper pipe is heavier, and production cost is higher.
Utility model content
For above-mentioned deficiency of the prior art, main purpose of the present utility model is to solve now currently used for radio frequency electrical
The wall thickness of the inner wire of cable is larger to lead to that weight is big, the problem of high cost, and provides one kind to have preferable structural strength, and
The radio-frequency cable inner conductor of lighter in weight.
The technical solution of the utility model:A kind of copper tube inner conductors for radio-frequency cable are it is characterised in that include pipe
Body, is provided with female thread on described inboard wall of tube body, and described female thread diagonally distributes along inboard wall of tube body, the helical angle of described female thread
For 5 ° ~ 45 °, the addendum angle of described female thread is 10 ° ~ 60 °, a height of 0.05 ~ 0.3mm of tooth of described female thread;In described body
On inwall, the tooth bar number of female thread is 30 ~ 80, and the wall thickness of described body is 0.18 ~ 0.40mm.
In this utility model, described body is to refer in particular to copper pipe, and it can only be applied on copper pipe, applies on other tubing
This structure is then false, because being characteristic according to copper pipe itself here the structure and parameter index that designs it is therefore an objective to reach
Specific technique effect.Produce mutually isostructural pipe structure even with other tubing, but be also impossible to reach this
The technique effect that the copper pipe of structure has, should have good conductive capability, also will have enough hardness and toughness simultaneously,
And also can have appropriate cost, these conditions can be met simultaneously, copper pipe can only be selected.
In this utility model, by arrange female thread structure, can greatly strengthen the structural strength of body, this be also for
Cooperation foregoing slim pipe structure, it is to avoid the pliable situation of body, by arranging female thread so that slim
The structure of body can be promoted in actual applications, and specific helical angle, addendum angle and the high setting of tooth, it is through repeatedly
Experiment, comparison combination technology personnel open one's minds and draw, it is by being adjusted so that managing to three parameters simultaneously
The intensity of body can reach most preferably, and so allowing for slim pipe structure has the value of application, can also save material simultaneously
Material, reduces cost.Also, it should be noted because traditional inner wire copper pipe body uses the body of smooth inner wall mostly
Structure, is that craft precision is too high and is difficult to complete, therefore although female thread technology is at other the reason be not provided with female thread
There is certain application in industry, for example, make steel, but the particularity due to radio frequency transmission industry, copper pipe can only be adopted, copper pipe is certainly
The softer characteristic of body leads to traditional radio-frequency cable inner conductor must reach certain thickness guarantee intensity, and copper pipe
Caliber must also meet the requirements it is impossible to too thick, and the wall thickness therefore wanting to reduce inner wire is a technique very with difficulty,
And want to be threaded on copper pipe inwall be also very difficulty thing, as long as being not to be provided with female thread just to strengthen copper
The intensity of pipe, applicant finds in experimentation repeatedly, because the parameter such as angle of design is different, under many circumstances,
Even if being provided with female thread, the body of inner wire is still easy to be broken off, and intensity difficult to reach demand therefore increased interior spiral shell
The body intensity just certain lifting arranging and being not equal to inner wire of stricture of vagina, so, set the ginseng such as specific angle in the application
Number, this is the creative unexpected technique effect that will bring after several parameter collective effects of applicant, if exceeded
This parameter area, then intensity be difficult to ensure.
Optimally, the external diameter of described body is 4 ~ 16mm.Due to improving the knot of body by specific female thread structure
Structure intensity, therefore also has obvious expansion for the scope of application of body, can make the body of different-diameter to meet different shaped
The demand of number equipment, the range of application so allowing for radio-frequency cable expands.
Optimally, the tooth bar number of described female thread is 40.In this utility model, using 40 tooth bar numbers design be through
Cross calculating, obtained from experiment and comprehensive debugging, when using the tooth bar of 40, be obtained in that in structural strength first preferably
Effect, secondly the spacing of tooth bar is moderate, can form an entirety, not result in the inadequate problem of local strength, then make
Make precision preferably, existing process equipment can reach required manufacturing conditions simultaneously.
Optimally, described body includes the first conductor tube and the second conductor tube, described first conductor tube and the second conductor tube
Docking, is provided with internal lining pipe in the inner side of the first conductor tube and the junction of the second conductor tube, the left end of described internal lining pipe stretches into
In first conductor tube, the right-hand member of internal lining pipe stretches into the second conductor tube, the outer wall of described internal lining pipe respectively with the first conductor tube in
The inwall of wall and the second conductor tube is welded and fixed.The pipe structure of the stagewise adopting here is in order to meet distance
Need during transmission to connect the purpose of two pipes, it not only has stable intensity, there is good exterior light sliding surface simultaneously, and
And simple to operate, reliability is preferable.
With respect to prior art, this utility model has the advantages that:
1st, there is enough intensity:Inner wire of the present utility model passes through to arrange the structure of female thread on copper pipe inwall,
Make copper pipe have good structural strength, be difficult to be bent, ensure the normal use of cable.
2nd, reduce weight, to improve intensity due to employing female thread structure, the therefore wall thickness of copper pipe can be thinning, from
And save material, reduce the production cost of enterprise.
3rd, there is higher communication quality, because the thickness of overall copper pipe is relatively low, the impedance of therefore tubing itself reduces, and has
Beneficial to improving communication quality, reduce the caloric value of itself simultaneously.
Brief description
Fig. 1 is a kind of copper tube inner conductors for radio-frequency cable of this utility model structure sectional view radially.
Fig. 2 is a kind of copper tube inner conductors for radio-frequency cable of this utility model structure sectional view vertically.
Fig. 3 is a kind of internal structure schematic diagram of the copper tube inner conductors for radio-frequency cable of this utility model.
In figure, 1 body, 11 first conductor tube, 12 second conductor tube, 13 internal lining pipes, 2 female threads.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As depicted in figs. 1 and 2, a kind of copper tube inner conductors for radio-frequency cable, including body 1, described body 1 is copper
Pipe, the external diameter of described body 1 can be 4mm, 5mm, 5.5mm, 7mm, 8.5mm, 11mm, 12mm, 13mm, 15mm or 16mm etc..
Female thread 2 is provided with described body 1 inwall, described female thread 2 diagonally distributes along body 1 inwall, the spiral of described female thread 2
Angle can be 5 °, 8 °, 10 °, 13 °, 17 °, 25 °, 31 °, 33 °, 38 °, 42 °, 44 °, 45 ° etc., and helical angle here not only can
Improve machining accuracy, and be conducive to improving body service life.The addendum angle of described female thread 2 can for 10 °, 15 °, 22 °,
27 °, 31 °, 39 °, 46 °, 55 °, 58 °, 60 ° etc., addendum angle effect here is to control the flatness of tooth bar, simultaneously to tube wall
Formed and support, and have certain castering action for the raising of electrical efficiency.The tooth height of described female thread 2 can for 0.05mm,
0.1mm, 0.15mm, 0.2mm, 0.28mm, 0.3mm etc., can reach different changing firmness requirements by the high design of different teeth, this
Sample just provides to the selection of the thickness of tube wall and more facilitates, and particularly can apply slim tube wall model, such as body 1
Wall thickness can for 0.18mm, 0.20mm, 0.21mm, 0.22mm, 0.23mm, 0.29mm, 0.32mm, 0.35mm, 0.38mm,
0.40mm etc..Different tooth height designs and combines the design of above-mentioned helical angle and addendum angle, can comprehensively reach and both have foot
Enough hardness has preferable precision and flatness again, also has relatively thin pipe thickness and good electrical efficiency, therefore has
There is extraordinary combination property.In this utility model, on described body 1 inwall, the tooth bar number of female thread 2 can be 30 ~ 80
Bar, is optimal wherein with 40.
Referring to Fig. 3, described body 1 includes the first conductor tube 11 and the second conductor tube 12, described first conductor tube 11 and
Two conductor tube 12 are docked, and are provided with internal lining pipe 13 in the inner side of the first conductor tube 11 and the junction of the second conductor tube 12, described
The left end of internal lining pipe 13 stretches in the first conductor tube 11, and the right-hand member of internal lining pipe 13 stretches into the second conductor tube 12, described internal lining pipe 13
Outer wall be welded and fixed with the inwall of the first conductor tube 11 and the inwall of the second conductor tube 12 respectively.Here interior welds are adopted
Attachment structure is so that when needing to connect longer body, have reliable organization plan, structural strength can also access simultaneously
Ensure.
Radio-frequency cable inner conductor application of the present utility model very has specific aim, can only be copper pipe, and here
On the basis of by the regulation of structure and angle, reached extraordinary combination property, therefore can not only meet radio-frequency cable
Demand, also there is good range of application simultaneously.
It should be noted that above example is only in order to illustrate technical solutions of the utility model rather than restriction technologies scheme,
Although applicant is explained in detail to this utility model with reference to preferred embodiment, those of ordinary skill in the art should manage
Solution, those modifications that technical solutions of the utility model are carried out or equivalent it is impossible to depart from the technical program objective and
Scope, all should cover in the middle of this utility model right.