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CN-224217256-U - Boost-level flame-retardant low intermodulation feeder

CN224217256UCN 224217256 UCN224217256 UCN 224217256UCN-224217256-U

Abstract

The application discloses a boost-level flame-retardant low intermodulation feeder, and relates to the technical field of cables; the pressurizing-stage flame-retardant low-intermodulation feeder comprises an inner conductor, an insulating layer, an outer conductor and a sheath which are coaxially arranged from inside to outside, wherein the outer conductor is a spiral corrugated metal pipe, the insulating layer is low-density polytetrafluoroethylene with a fibrous micropore structure, and the sheath is pressurizing-stage flame-retardant poly perfluoroethylene propylene; the pressurizing-stage flame-retardant low-intermodulation feeder provided by the application has the characteristics of high temperature resistance, high flame retardance, high shielding, low loss, low passive intermodulation and super-soft bending, is suitable for pressurizing-stage cables or cable assemblies of an UL system, and is particularly suitable for high flame-retardant safety application occasions of interlayer and super-flexible wiring connection of ceilings.

Inventors

  • SHOU HAO
  • WEI XIAOLAN
  • LI JIANJUN
  • Ni Anhua
  • ZHU LIANGMEI

Assignees

  • 珠海汉胜科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250528

Claims (10)

  1. 1. The supercharging-stage flame-retardant low-intermodulation feeder comprises an inner conductor, an insulating layer, an outer conductor and a sheath which are coaxially arranged from inside to outside, and is characterized in that the outer conductor is a spiral corrugated metal pipe; the insulating layer is made of low-density polytetrafluoroethylene with a fibrous microporous structure; the sheath is boost-level flame-retardant poly perfluoroethylene propylene.
  2. 2. The booster stage flame retardant low intermodulation feed line of claim 1, wherein the ratio of the diameter of the inner conductor, the outer diameter of the insulating layer, and the outer diameter of the outer conductor is (0.8-2.8): (2.2-7.5): (3.2-10.0).
  3. 3. The booster stage flame retardant low intermodulation feed line of claim 2, wherein the spiral corrugated metal pipe has a wall thickness of 0.11mm to 0.25mm, a peak of 3.2mm to 10.0mm, a trough of 2.1mm to 7.1mm, and a pitch of 1.3mm to 3.6mm.
  4. 4. A booster stage flame retardant low intermodulation feed line according to claim 3, wherein the helically corrugated metal pipe is of copper or aluminium.
  5. 5. The boost level flame retardant low intermodulation feed line of claim 1, wherein the inner conductor is a soft round copper wire, a copper clad aluminum wire, a silver plated copper wire, or a silver plated copper clad aluminum wire.
  6. 6. The booster stage flame retardant low intermodulation feed line of claim 1, wherein the insulating layer is formed by wrapping at least two layers of low density polytetrafluoroethylene film raw material tape, each layer has a wrapping coverage rate of not less than 20%, and adjacent wrapping layers are opposite in direction.
  7. 7. The boost level flame retardant low intermodulation feed line of claim 6, wherein the low density polytetrafluoroethylene has a density of 0.4 to 0.7g/cm 3 .
  8. 8. The boost level flame retardant low intermodulation feed line of claim 1, wherein the boost level flame retardant poly perfluoroethylene propylene has an oxygen index of not less than 95%.
  9. 9. The booster stage flame retardant low intermodulation feed line of claim 8, wherein the jacket has a thickness of no less than 0.45mm.
  10. 10. The boost level flame retardant low intermodulation feed line of claim 1, wherein the boost level flame retardant low intermodulation feed line has an operating temperature of-55 to 200 ℃.

Description

Boost-level flame-retardant low intermodulation feeder Technical Field The utility model relates to the technical field of cables, in particular to a boost-level flame-retardant low intermodulation feeder. Background In building design and construction, there are power supply system of overall design and central air conditioning system for heating, cooling and ventilating, and modern information wiring system also requires that every desk of every office can be connected with communication system for accessing telephone, fax, data terminal and computer, etc. in order to make the decoration of building beautiful, the above-mentioned various pipeline systems are laid in the form of concealed pipe and concealed wire in the ceiling layer, and the communication cable is often laid together with pipeline of air conditioning system. In the past, communication cables in a building are distributed in an interlayer of a ceiling in a hidden line mode, the requirement of high temperature resistance is not considered, but when a pipeline of a central air conditioning system appears in the interlayer of the ceiling of the building, the adjacent communication cables are influenced, when a fire disaster happens, the equipment needs to be ensured to collect data immediately after receiving fire alarms and transmit all the data to a safe place, the complete loss of information is ensured, a large amount of toxic gas and smoke dust are generated in the cable in the combustion process, the escape of personnel is greatly influenced, the safety hazard is caused, so that the high temperature resistance and high flame retardance cables play a vital role in data backup and life and property safety, and the quantity of the cables wired in the building is large and complicated, so that the communication cables can be flexibly wired in a limited space, and the communication cables have the characteristics of high shielding, low loss and low passive intermodulation in daily use. Disclosure of utility model The application provides a boost-level flame-retardant low intermodulation feeder line, which is suitable for application in a boost-level flame-retardant level scene of an UL system. The application provides a boost-level flame-retardant low intermodulation feeder, which comprises an inner conductor, an insulating layer, an outer conductor and a sheath, wherein the inner conductor, the insulating layer, the outer conductor and the sheath are coaxially arranged from inside to outside, and the outer conductor is a spiral corrugated metal pipe; the insulating layer is made of low-density polytetrafluoroethylene with a fibrous microporous structure; the sheath is boost-level flame-retardant poly perfluoroethylene propylene. Optionally, the ratio of the diameter of the inner conductor, the outer diameter of the insulating layer and the outer diameter of the outer conductor is (0.8-2.8): (2.2-7.5): (3.2-10.0). Optionally, the thickness of the wall of the spiral corrugated metal pipe is 0.11-0.25 mm, the wave crest is 3.2-10.0 mm, the wave trough is 2.1-7.1 mm, and the pitch is 1.3-3.6 mm. Optionally, the spiral corrugated metal tube is made of copper or aluminum. Optionally, the inner conductor is a soft round copper wire, a copper-clad aluminum wire, a silver-plated copper wire or a silver-plated copper-clad aluminum wire. Optionally, the insulating layer is formed by wrapping at least two layers of low-density polytetrafluoroethylene film raw material tapes, the wrapping covering rate of each layer is not less than 20%, and the adjacent wrapping layers are opposite in direction. Optionally, the density of the low-density polytetrafluoroethylene is 0.4-0.7 g/cm 3. Optionally, the oxygen index of the boost-level flame retardant poly (perfluoroethylene propylene) is not lower than 95%. Optionally, the thickness of the sheath is not less than 0.45mm. Optionally, the working temperature of the boost-level flame-retardant low intermodulation feeder is-55-200 ℃. The technical scheme of the application has the following beneficial effects: The pressurizing-level flame-retardant low-intermodulation feeder provided by the application adopts a low-density polytetrafluoroethylene wrapping insulation, a spiral corrugated outer conductor and a pressurizing-level flame-retardant sheath structure, wherein the low-density polytetrafluoroethylene wrapping insulation has the characteristics of low dielectric loss, small influence of temperature and signal frequency change, excellent temperature resistance, good weather resistance and the like, the totally-enclosed spiral corrugated metal tube outer conductor is used as a shielding layer to shield electromagnetic noise interference, the cable structure is softer and the mechanical property is enhanced, and the pressurizing-level flame-retardant polytetrafluoroethylene can effectively prevent flame diffusion and has the advantages of excellent high temperature resistance, weather resistance, pressurizing-le