WO2018040637A1 - Câble coaxial à fuite et son procédé de fabrication - Google Patents

Câble coaxial à fuite et son procédé de fabrication Download PDF

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Publication number
WO2018040637A1
WO2018040637A1 PCT/CN2017/086387 CN2017086387W WO2018040637A1 WO 2018040637 A1 WO2018040637 A1 WO 2018040637A1 CN 2017086387 W CN2017086387 W CN 2017086387W WO 2018040637 A1 WO2018040637 A1 WO 2018040637A1
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WO
WIPO (PCT)
Prior art keywords
insulating layer
copper
coaxial cable
leaky coaxial
silver
Prior art date
Application number
PCT/CN2017/086387
Other languages
English (en)
Chinese (zh)
Inventor
赵瑞静
许波华
蓝燕锐
史卫箭
黄德兵
薛济萍
Original Assignee
中天射频电缆有限公司
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Filing date
Publication date
Application filed by 中天射频电缆有限公司 filed Critical 中天射频电缆有限公司
Publication of WO2018040637A1 publication Critical patent/WO2018040637A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
    • H01B7/366—Insulated conductors or cables characterised by their form with distinguishing or length marks being a tape, thread or wire extending the full length of the conductor or cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/06—Coaxial lines

Definitions

  • the invention relates to the field of communication transmission, and in particular to a leaky coaxial cable and a preparation method thereof.
  • Leaky coaxial cable is a special antenna used in underground mobile communication system to improve electromagnetic wave propagation characteristics. It has both transmission characteristics and antenna radiation characteristics, can overcome underground strong electromagnetic interference, and solves high-frequency wireless signals. The problem that the tunnel space cannot be naturally transmitted. At present, in addition to the wireless communication coverage of railways, tunnels, mines and other places, the cable leakage is widely used in security, detection and sensing, etc., and the development prospect is very broad.
  • the traditional leaky coaxial cable generally includes an inner conductor, an insulating layer, a punched copper tape wrap or a longitudinal outer conductor and an outer sheath from the inside to the outside, wherein the insulating layer is usually composed of physical foamed polyethylene, and the temperature is resistant. Poor performance, only about 85 degrees, can not meet the needs of high temperature environment.
  • a leaky coaxial cable which is an inner conductor, an insulating layer, an outer conductor and a sheath from the inside to the outside, and the inner conductor is composed of a conductive pipe, characterized in that the insulating layer is wrapped in Outside the inner conductor, the insulating layer is composed of a high dielectric constant high temperature material, the outer conductor is wrapped outside the insulating layer, the outer conductor is composed of a conductive strip, and the sheath is wrapped around the outer conductor, the sheath It is composed of an oxidation resistant high temperature resistant material.
  • Another aspect of the present invention provides a method for preparing the above leaky coaxial cable, comprising the following steps:
  • the high dielectric constant high temperature resistant material being polytetrafluoroethylene, polyperfluoroethylene propylene At least one of an ethylene-tetrafluoroethylene copolymer and polyvinylidene fluoride;
  • the leaky coaxial cable provided by the invention has the characteristics of high temperature resistance and ultra-softness, and is suitable for special occasions with high temperature requirements of 200 ° C and above, in particular, can work stably in a high temperature environment for a long time, and maintain good mechanical properties. .
  • FIG. 1 is a schematic structural view of a leaky coaxial cable according to Embodiment 1 of the present invention.
  • FIG. 2 is a cross-sectional view showing a leaky coaxial cable according to Embodiment 1 of the present invention.
  • FIG 3 is a cross-sectional view showing a leaky coaxial cable according to a third embodiment of the present invention.
  • One aspect of the present invention provides a leaky coaxial cable, which is an inner conductor, an insulating layer, an outer conductor, and a sheath from the inside to the outside, and the inner conductor is composed of a conductive pipe, and the insulating layer is wrapped around the inner conductor.
  • the insulating layer is composed of a high dielectric constant high temperature material
  • the outer conductor is wrapped outside the insulating layer
  • the outer conductor is composed of a conductive strip
  • the sheath is wrapped outside the outer conductor
  • the sheath is resistant to oxidation Made of high temperature resistant materials.
  • the leaky coaxial cable provided by the invention has the characteristics of high temperature resistance and ultra-softness, and is suitable for special occasions with high temperature requirements of 200 ° C and above, in particular, can work stably in a high temperature environment for a long time, and maintain good mechanical properties. .
  • the high dielectric constant refractory material is a refractory material having a dielectric constant of less than 3, including but not limited to polytetrafluoroethylene, polyperfluoroethylene propylene, ethylene-tetrafluoroethylene copolymerization. And at least one of polyvinylidene fluoride.
  • the high dielectric constant refractory material is polytetrafluoroethylene.
  • the insulating layer has an outer diameter of 0.1 to 7 mm.
  • the outer diameter of the insulation is 3.5 to 7 mm.
  • the leaky cable provided by the invention has a small outer diameter of the insulation, and can ensure that the bending radius thereof does not exceed 100 mm, which is only half of the bending radius of the leaky coaxial cable for the conventional indoor covering, and the limit bending radius is not more than 80 mm, and has good flexibility. Performance to meet the needs of existing wireless cabling.
  • the inner conductor is composed of a conductive tube which is a tubular or linear conductive material
  • the tubular conductive material comprises a hollow tube or a solid tube, including silver plated copper wire, silver plated At least one of a copper clad steel wire, a solid copper wire, and a copper pipe.
  • the electrically conductive tube of the inner conductor is embossed to form a spiral wrinkle.
  • the inner conductor has a diameter of 2 to 3 mm.
  • the outer conductor is composed of a conductive strip which is wrapped, longitudinally wrapped or woven by a strip-shaped conductive material, the conductive strip being a strip or a wire braid
  • the conductive material comprises at least one of a galvanized copper wire, a galvanized copper clad steel wire, a silver plated copper wire or a silver plated copper clad steel wire and a copper tape.
  • the outer conductor has a thickness of 0.05 to 0.2 mm.
  • the electrically conductive strip is provided with at least one slot of a vertical structure.
  • the vertical shape includes, but is not limited to, a geometry that is longer than the width, including but not limited to a long strip or an arc.
  • the arc slot has a slot length of 8 to 12 mm, an arc of 4 to 6 degrees, a slot pitch of 240 to 260 mm, and a slot width of 1.6 to 2.6 mm.
  • the elongated slot has a slot length of 8 to 12 mm, a slot pitch of 240 to 260 mm, and a slot width of 1.6 to 2.6 mm.
  • the outer surface of the sheath is provided with a sheath marking line.
  • the oxidation resistant refractory material has excellent oxidation resistance including, but not limited to, polyperfluoroethylene propylene.
  • Another aspect of the present invention provides a method for fabricating the above-described leaky coaxial cable, comprising the following steps:
  • the high dielectric constant high temperature resistant material being polytetrafluoroethylene, polyperfluoroethylene propylene At least one of an ethylene-tetrafluoroethylene copolymer and polyvinylidene fluoride;
  • the pushing in the step (1) comprises sufficiently stirring a high dielectric constant high temperature resistant material and an auxiliary oil, and then putting it into a ripening cabinet for curing, and the matured mixture passes through
  • the binder control box is pressed into the acrylic tube, the mixed slurry in the acrylic tube is poured into the pusher cylinder, placed in the inner conductor, and then the mixture is coextruded with the inner conductor to form an inner conductor with an insulating layer.
  • the proportion of the auxiliary oil is 16% to 22%, and the auxiliary oil is 90# solvent oil.
  • the extrusion method in the step (3) is carried out by means of screw extrusion.
  • the aging is to condense the high temperature material at a set temperature of 30 to 40 °C.
  • the pusher uses a brake pressure of 6 to 10 MPa and a vulcanization temperature of 190 to 220 ° C for co-extruding the mixture with the inner conductor.
  • the wrapping in the step (1) is to wrap the 2-3 layers of the high dielectric constant refractory material without gaps.
  • the winding in the step (2) and the step (3) can also be carried out in the same manner as in the step (1).
  • the slit woven galvanized copper wire, the galvanized copper-clad steel wire, the silver-plated copper wire or the silver-plated copper-clad steel wire in the step (2) is formed by plating a plurality of wires.
  • Zinc-copper wire, galvanized copper-clad steel wire, silver-plated copper wire or silver-plated copper-clad steel wire are wound on the insulation layer according to the required weaving density, each galvanized copper wire, galvanized copper-clad steel wire, silver-plated copper
  • the gap between the wire or the silver-plated copper clad steel wire is controlled by the weaving density to control the lateral radiation performance of the final product.
  • the weaving density is from 60% to 75%.
  • the step of wrapping the wrapped copper strip in the step (2) is to vertically or wrap the slotted copper strip on the insulating layer, and according to the The required lateral radiation performance requirements are designed with different slotted structures.
  • the method of vertically wrapping the copper strip further comprises: micro-rolling the slotted copper strip, and longitudinally lapging on the insulating layer, and designing different according to required lateral radiation performance requirements. Slotted structure.
  • the slotted structure is a vertical structural slot.
  • the vertical shape includes, but is not limited to, a geometry that is longer than the width, including but not limited to curved slots or elongated strips.
  • the step (3) further comprises providing an identification line on the sheath.
  • the oxidation resistant refractory material has excellent oxidation resistance including, but not limited to, polyperfluoroethylene propylene.
  • a leaky coaxial cable includes an inner conductor 1, an insulating layer 2, an outer conductor 3, and a sheath 4 in this order from the inside to the outside.
  • the inner conductor 1 is composed of a 2.6 mm copper tube and the inner conductor 1 is embossed to form a spiral wrinkle 5 on the surface.
  • the insulating layer 2 is wrapped on the outside of the inner conductor 1, and the insulating layer 2 is formed by extrusion of polytetrafluoroethylene, and the outer diameter of the insulating layer 2 is 6.5 mm.
  • the outer conductor 3 is wrapped outside the insulating layer 2, and the outer conductor 3 is formed by a longitudinally wrapped copper strip.
  • the outer conductor 3 is further provided with at least one slot hole 6 which is an arc-shaped slot hole having a length of 9 mm, an arc of 5 degrees and a width of 2 mm. When there are a plurality of slots 6, the slot 6 has a pitch of 245 mm.
  • the outer conductor 3 has a thickness of 0.1 mm.
  • the sheath 4 is wrapped around the outer conductor 3, and the sheath 4 is formed of a polyperfluoroethylene propylene wrap.
  • the outer surface of the sheath 4 is also provided with an identification line 7.
  • a leaky coaxial cable includes an inner conductor 1, an insulating layer 2, an outer conductor 3, and a sheath 4 in this order from the inside to the outside.
  • the inner conductor 1 is composed of a 2.4 mm copper tube and the inner conductor 1 is embossed to form a spiral wrinkle 5 on the surface.
  • the insulating layer 2 is wrapped on the outside of the inner conductor 1, and the insulating layer 2 is formed by extrusion of polyperfluoroethylene propylene.
  • the outer diameter of the insulating layer 2 is 6.0 mm.
  • the outer conductor 3 is wrapped outside the insulating layer 2, and the outer conductor 3 is formed by a longitudinally wrapped copper strip.
  • the outer conductor 3 is further provided with at least one arcuate slot 6 having a length of 12 mm, a width of 1.6 mm and an arc of 4. When there are a plurality of slots 6, the slots 6 have a pitch of 260 mm.
  • the outer conductor 3 has a thickness of 0.2 mm.
  • the sheath 4 is wrapped around the outer conductor 3, and the sheath 4 is formed of a polyperfluoroethylene propylene wrap.
  • a leaky coaxial cable according to an embodiment of the present invention includes an inner conductor 1, an insulating layer 2, an outer conductor 3, and a sheath 4 in this order from the inside to the outside.
  • the inner conductor 1 is composed of a 3 mm silver plated copper wire.
  • the insulating layer 2 is wrapped on the outside of the inner conductor 1.
  • the insulating layer 2 is composed of a microporous polytetrafluoroethylene package, and the outer diameter of the insulating layer 2 is 3.5 mm.
  • the outer conductor 3 is wrapped on the outside of the insulating layer 2, and the outer conductor 3 is composed of slit-woven galvanized copper wire, and the slot 8 is formed according to a certain weaving density, and the knitting density is 60%.
  • the sheath 4 is wrapped around the outer conductor 3, and the sheath 4 is formed by extrusion of polyperfluoroethylene propylene.
  • the polyperfluoroethylene propylene and the 90# solvent oil are thoroughly stirred, and then matured at 30 ° C in a ripening cabinet, and the aged mixture is pressed into an acrylic tube through a binder control box, and the mixture in the acrylic tube is mixed. Pour into the cylinder of the pusher, place the inner conductor, and then coextrude the mixture with the inner conductor to form an inner conductor with an insulating layer.
  • the brake pressure is 6 MPa, and the push volatilization temperature is 190 °C.
  • the 90# solvent oil percentage was 16%.
  • a plurality of galvanized copper wires are wound on the insulating layer according to a desired weaving density, and a gap between each galvanized copper wire has a weaving density of 60% to form an outer conductor;
  • a jacket is formed by extrusion of polyperfluoroethylene propylene on the outer conductor.
  • the ethylene-tetrafluoroethylene copolymer and the 90# solvent oil are thoroughly stirred, and then matured at 40 ° C in a ripening cabinet, and the aged mixture is pressed into an acrylic tube through a press control box, and the acrylic tube is placed in the acrylic tube.
  • the mixture was poured into the cylinder of the pusher, placed in the inner conductor, and then the mixture was coextruded with the inner conductor to form an inner conductor with an insulating layer, the brake pressure was 10 MPa, and the pushing volatilization temperature was 220 °C.
  • the 90# solvent oil ratio was 22%.
  • a plurality of galvanized copper wires are wound on the insulating layer according to a desired weaving density, and a gap between each galvanized copper wire has a weaving density of 75% to form an outer conductor;
  • a jacket is formed by extrusion of polyperfluoroethylene propylene on the outer conductor.
  • the polyvinylidene fluoride is wrapped around the two layers to form an insulating layer on the inner conductor.
  • the slotted copper strip is micro-rolled and then longitudinally overlapped on the insulating layer to form an outer conductor, and a plurality of arc-shaped slots are provided on the outer conductor according to the required lateral radiation performance requirements.
  • a sheath of polyperfluoroethylene propylene is wrapped around the outer conductor, and a marking line is placed on the sheath.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Waveguide Aerials (AREA)
  • Insulated Conductors (AREA)

Abstract

La présente invention concerne un câble coaxial à fuite et son procédé de fabrication. Le câble coaxial à fuite comprend séquentiellement, de l'intérieur vers l'extérieur : un conducteur interne (1) ; une couche d'isolation (2) ; un conducteur externe (3) ; et une gaine (4). Le conducteur interne (1) est constitué d'un matériau de tube électriquement conducteur. La couche d'isolation (2) entoure le conducteur interne (1). La couche d'isolation (2) est constituée d'un matériau résistant aux températures élevées ayant une constante diélectrique élevée. Le conducteur externe (3) entoure la couche d'isolation (2). Le conducteur externe (3) est constitué d'une bande électriquement conductrice. La gaine (4) entoure le conducteur externe (3). La gaine (4) est constituée d'un matériau résistant à l'oxydation et résistant aux températures élevées. Le câble coaxial à fuite présente une résistance aux températures élevées, est extrêmement flexible, et peut fonctionner de manière stable dans un environnement à température élevée pendant une longue période tout en conservant de bonnes performances mécaniques.
PCT/CN2017/086387 2016-08-31 2017-05-27 Câble coaxial à fuite et son procédé de fabrication WO2018040637A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610794621.0A CN107785105A (zh) 2016-08-31 2016-08-31 漏泄同轴电缆及其制备方法
CN201610794621.0 2016-08-31

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Cited By (3)

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CN109524752A (zh) * 2019-01-11 2019-03-26 广州天移通信科技发展有限公司 一种螺纹结构绝缘层低损耗半柔射频同轴电缆
CN114447553A (zh) * 2022-01-24 2022-05-06 安徽宏源特种电缆股份有限公司 一种航空航天用超轻型低损耗稳相同轴电缆
CN115954637A (zh) * 2022-12-14 2023-04-11 江苏云舟通信科技有限公司 一种耐腐蚀柔性同轴电缆及其制备方法

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CN109142157B (zh) * 2018-07-13 2021-08-24 湖南大学 一种测试土石坝浸润线电缆
CN111029698A (zh) * 2019-12-12 2020-04-17 安徽联嘉祥特种电缆有限公司 用于5g信号传输的同轴漏缆

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CN2779568Y (zh) * 2005-04-21 2006-05-10 天津亨特尔线缆有限公司 可泄漏同轴电缆
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109524752A (zh) * 2019-01-11 2019-03-26 广州天移通信科技发展有限公司 一种螺纹结构绝缘层低损耗半柔射频同轴电缆
CN114447553A (zh) * 2022-01-24 2022-05-06 安徽宏源特种电缆股份有限公司 一种航空航天用超轻型低损耗稳相同轴电缆
CN115954637A (zh) * 2022-12-14 2023-04-11 江苏云舟通信科技有限公司 一种耐腐蚀柔性同轴电缆及其制备方法
CN115954637B (zh) * 2022-12-14 2023-10-20 江苏云舟通信科技有限公司 一种耐腐蚀柔性同轴电缆及其制备方法

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