Cracking prevention semi-hard cable

An anti-cracking and cable technology, applied in the direction of insulating cables, cables, circuits, etc., can solve problems such as system paralysis, component damage, and cracking of tubular outer conductors, and achieve the effect of ensuring concentricity and service life

Active Publication Date: 2016-03-16
江苏安胜达航天科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure that there is no hole between the medium and the outer conductor, the thickness of the gap is only about 0.025mm, which can only ensure that the seamless tubular metal outer conductor does not crack in a small range beyond the rated power.
However, in extreme cases, due to the rapid expansion of the volume of the dielectric material when heated, and the limited elongation of the seamless tubular metal outer conductor, the tubular outer conductor will still be cracked, the parts will be damaged, and even the entire system will be paralyzed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] Such as figure 1 and figure 2 As shown, it includes an inner conductor 1, a dielectric layer 2 wrapped outside the inner conductor 1, and an outer conductor 4 wrapped outside the dielectric layer 2. A buffer layer 3 is also provided between the dielectric layer 2 and the outer conductor 4. The buffer layer 3 consists of It is made of continuous solid material with pores, specifically: the buffer layer 3 is a cylindrical structure with air bubbles 31a dispersed inside, and the thickness of the buffer layer 3 is 0.1-5mm. The dielectric layer 2 and the buffer layer 3 play the role of isolating the inner conductor 1 and the outer conductor 2, and can maintain a certain degree of concentricity between the two to avoid disturbance during power transmission. The dielectric layer 2 is attached to the inner conductor 1, and when the inner conductor 1 heats up, the dielectric layer 2 will expand; but because the buffer layer 3 contains air bubbles 31a, it is compressible, and i...

Embodiment approach 2

[0033] Such as figure 1 and image 3 As shown, the difference from Embodiment 1 is that the buffer layer 22 is wrapped by a film 32a with micropores 32b in a single layer or multiple layers, and the single layer thickness of the film 32a is 0.01-2mm, and the total wrapping thickness is 0.05-5mm. The package can be in various forms such as wrapping, longitudinal wrapping or extrusion wrapping. Since the film 32a itself has micropores 32b inside, it is compressible, so the buffer layer 3 formed by wrapping is also compressible. In addition, in the case of cable bending, the wrapping layers can slide against each other, and the material will not be fatigued by cable bending and is less likely to be damaged.

[0034] This film 32a can be the expanded microporous film produced by stretching the PTFE material, and the density of the film 32a is 0.5-1.9g / cm 3 . Within a certain stretching range, the film 32a can all play the role of preventing cracking of the outer conductor 4 ....

Embodiment approach 3

[0036] Such as figure 1 and Figure 4 As shown, the difference from Embodiment 1 is that the buffer layer 3 includes a ring portion 33a close to the outer conductor 4 and a number of protruding teeth 33b uniformly distributed on the inner wall of the ring portion 33a, and the protruding teeth 33b are held against the dielectric layer 2 of the outer surface. The ring portion 33a can conform to the inner wall structure of the outer conductor 4. When the dielectric layer 2 expands, the protruding teeth 33b will still bear against the outer surface of the dielectric layer 2 but elastically deform, so that the expansion of the dielectric layer 2 can be compensated. Prevent the outer conductor 4 from bursting.

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Abstract

The invention belongs to the technical field of a coaxial cable and relates to a cracking prevention semi-hard cable. The cracking prevention semi-hard cable comprises an inner conductor, a dielectric layer and an outer conductor, wherein the dielectric layer wraps outside the inner conductor, the outer conductor wraps outside the dielectric layer, and a buffer layer is further arranged between the dielectric layer and the outer conductor and made of a continuous solid material with pores. The buffer layer of the cracking prevention semi-hard cable is provided with a buffer structure which can be used for preventing the outer conductor from bursting, and the service lifetime of the cable in an extreme working condition is guaranteed.

Description

technical field [0001] The invention relates to the technical field of coaxial cables, in particular to a semi-rigid cable capable of preventing a dielectric layer from expanding and bursting due to heat. Background technique [0002] Currently on the market for high-power signal transmission semi-rigid (including semi-flexible) cables, most of their dielectric materials are solid solid PTFE materials. During the transmission of high-power radio frequency signals, the cable medium will generate heat. When the PTFE solid material is heated, its volume will expand. Under certain circumstances, its outer conductor (seamless metal tube or wire braided tin) will expand and burst due to the volume expansion of the medium, causing damage to the cable. [0003] In order to avoid the above problems in the prior art, the gap between the medium and the outer conductor is usually controlled or the elongation of the outer conductor material is changed to buffer the volume expansion of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/29
CPCH01B7/29
Inventor 朱云川
Owner 江苏安胜达航天科技股份有限公司
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