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CN-121983381-A - Radio frequency coaxial cable with phase-change microcapsule

CN121983381ACN 121983381 ACN121983381 ACN 121983381ACN-121983381-A

Abstract

The application relates to the technical field of radio frequency coaxial cables, in particular to a radio frequency coaxial cable with phase change microcapsules, which comprises a cable main body, wherein the cable main body comprises an inner conductor and an outer conductor, the outer conductor is positioned on the outer ring of the inner conductor, a polyethylene insulating layer is arranged between the inner conductor and the outer conductor, the polyethylene insulating layer comprises a first foaming insulating layer and a second foaming insulating layer in sequence according to the radial direction, the heat conductivity coefficient of the first foaming insulating layer is larger than that of the second foaming insulating layer, the second foaming insulating layer contains a wrapping phase change material, and the thickness of the second foaming insulating layer is 50-60 of the thickness of the first foaming insulating layer. Under the condition of keeping the foaming degree and the electrical property of the insulating layer, the application realizes the control of heat by improving the heat conductivity coefficient of the insulating layer, and ensures that the whole cable works in an expected temperature range.

Inventors

  • XU HUI
  • CHENG SHUNLI
  • HU YUE
  • LI JIANJUN

Assignees

  • 浙江融汇通信设备有限公司

Dates

Publication Date
20260505
Application Date
20260408

Claims (10)

  1. 1. The radio frequency coaxial cable with the phase change microcapsule is characterized by comprising a cable main body, wherein the cable main body comprises an inner conductor and an outer conductor, the outer conductor is positioned on the outer ring of the inner conductor, a polyethylene insulating layer is arranged between the inner conductor and the outer conductor, and the polyethylene insulating layer comprises a first foaming insulating layer and a second foaming insulating layer in sequence according to the radial direction; The heat conductivity coefficient of the first foaming insulating layer is larger than that of the second foaming insulating layer, and the second foaming insulating layer contains phase change materials; The thickness of the second foaming insulating layer is 50% -60% of the thickness of the first foaming insulating layer.
  2. 2. The radio frequency coaxial cable with phase change microcapsules of claim 1, wherein the first foamed insulating layer contains a first filler and a second filler, the first filler is micro-nano boron nitride, and the second filler is nano boron nitride particles; The total adding proportion of the first filler and the second filler is 1% -2%.
  3. 3. A radio frequency coaxial cable having phase change microcapsules according to claim 2 wherein the ratio of the first filler to the second filler is from 10:1 to 50:1.
  4. 4. A radio frequency coaxial cable having phase change microcapsules according to claim 3 wherein the first filler comprises platy boron nitride and spherical boron carbide.
  5. 5. The radio frequency coaxial cable with phase change microcapsules of claim 1, wherein the second foamed insulating layer contains phase change microcapsules, the phase change microcapsules contain a phase change material, and the phase change material is wrapped by a first polymer film and a second polymer film, and the first polymer film and the second polymer film have the same composition; the phase change material is inorganic salt with the melting point of 80-230 ℃.
  6. 6. A radio frequency coaxial cable with phase change microcapsules according to claim 5 wherein the phase change material is a molten salt having a melting point of 80-160 ℃.
  7. 7. The radio frequency coaxial cable with phase change microcapsules of claim 5, wherein the first polymer film and the second polymer film are polyacrylate films.
  8. 8. A radio frequency coaxial cable having phase change microcapsules according to claim 5 wherein the phase change microcapsules have a diameter of 0.1-0.2mm.
  9. 9. A radio frequency coaxial cable with phase change microcapsules according to claim 1 wherein the first foamed insulating layer has a thickness of 1-5mm.
  10. 10. The radio frequency coaxial cable with phase change microcapsules of claim 1, wherein the first foamed insulating layer has a higher degree of foaming than the second foamed insulating layer.

Description

Radio frequency coaxial cable with phase-change microcapsule Technical Field The application relates to the technical field of radio frequency coaxial cables, in particular to a radio frequency coaxial cable with phase-change microcapsules. Background The coaxial cable is widely applied to the fields of communication, radar, broadcast television and the like, and has the core requirements of low signal loss and stable temperature control. At present, a foaming material is used as an insulating layer in the coaxial cable, and the following problems mainly exist: 1. Although the dielectric loss under high foaming degree is greatly reduced compared with the conductor of the solid insulating layer, the thermal coefficient is obviously reduced, even if the generated heat is very low, the heat cannot be actually and rapidly transmitted to the surface of the cable because the heat is not conducted, and the heat accumulation is easily generated because the insulating material with high foaming degree forms heat resistance; 2. At high foaming levels, if the foam formed is of non-uniform size, for example at a foaming level of greater than 80%, the conduction of heat in the length direction is not uniform, which further leads to the accumulation of heat and the formation of hot spots locally and accelerates the ageing of the medium in the corresponding location, even if breakdown could occur. In addition, the high foaming degree brings about an increase in cost and requires the use of a complicated process, so that balancing the complexity of the process and the electrical properties of the product becomes a problem to be solved. Disclosure of Invention At least one aspect and advantage of the present application will be set forth in part in the description that follows or may be apparent from the description. According to one aspect of the application, a radio frequency coaxial cable with phase change microcapsules is provided, the radio frequency coaxial cable comprises a cable main body, the cable main body comprises an inner conductor and an outer conductor, the outer conductor is positioned on the outer ring of the inner conductor, a polyethylene insulating layer is arranged between the inner conductor and the outer conductor, the polyethylene insulating layer sequentially comprises a first foaming insulating layer and a second foaming insulating layer according to the radial direction, the heat conductivity coefficient of the first foaming insulating layer is larger than that of the second foaming insulating layer, phase change materials are contained in the second foaming insulating layer, and the thickness of the second foaming insulating layer is 50% -60% of that of the first foaming insulating layer. According to one embodiment of the application, the first foaming insulating layer contains a first filler and a second filler, the first filler is micro-nano boron nitride, the second filler is nano boron nitride particles, and the total adding proportion of the first filler and the second filler is 1% -2%. According to one embodiment of the application, the ratio of the first filler to the second filler is 10:1 to 50:1. According to one embodiment of the application, the first filler comprises platy boron nitride and spherical boron carbide. According to one embodiment of the application, the phase-change microcapsule is contained in the second foaming insulating layer, the phase-change microcapsule contains a phase-change material, the phase-change material is wrapped by a first polymer film and a second polymer film, the components of the first polymer film and the second polymer film are consistent, and the phase-change material is inorganic salt with a melting point of 80-230 ℃. According to one embodiment of the application, the phase change material is a molten salt having a melting point in the range of 80-160 ℃. According to one embodiment of the application, the first polymer film and the second polymer film are polyacrylate films. According to one embodiment of the application, the diameter of the phase-change microcapsules is 0.1-0.2mm. According to one embodiment of the application, the thickness of the first foamed insulating layer is 1-5mm. According to one embodiment of the application, the first foamed insulating layer has a higher degree of foaming than the second foamed insulating layer. According to the embodiment of the application, under the condition of keeping the foaming degree and the electrical property of the insulating layer, the heat conduction coefficient is improved, so that the heat is controlled, and the whole cable works in an expected temperature range. Drawings The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. Fig. 1 is a schematic cross-sectional structure of a radio frequency coaxial c