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CN-122025277-A - Miniaturized high-density coaxial communication cable

CN122025277ACN 122025277 ACN122025277 ACN 122025277ACN-122025277-A

Abstract

The invention discloses a miniaturized high-density coaxial communication cable, and relates to the technical field of coaxial communication cables. The invention comprises a plurality of core wires, a shielding colloid layer, a wire mesh layer, a surrounding type outer wire layer, an outer shielding layer and a wrapping layer, wherein the core wires comprise a copper core, a silver wrapping layer and an insulating paint layer, a layer of copper powder is sprayed outside the core wires, the shielding colloid is coated and twisted, the shielding colloid is solidified to form the shielding colloid layer, the wire mesh layer is wound outside the shielding colloid layer, the wire mesh layer is wrapped outside the shielding colloid layer to form the wire mesh layer, the insulating wrapping layer is wrapped outside the wire mesh layer, the surrounding type outer wire layer comprises a plurality of flat outer wires, the copper foil is wrapped on the flat outer wires, and the outer shielding layer is wrapped by a micro extrusion molding process to form the wrapping layer. According to the invention, through shielding design of each core wire, the shielding colloid fills gaps and coats the stranded core wires, so that the transmission of interference signals is greatly reduced, and the problems of insufficient shielding degree between the existing core wires, inapplicability to high-precision transmission and the like are solved.

Inventors

  • JIN JIANBING
  • QIU MEIHUA
  • WEI TIANLONG
  • JI JIAWEI
  • YAO JIWEN

Assignees

  • 浙江康宇电缆有限公司

Dates

Publication Date
20260512
Application Date
20260202

Claims (9)

  1. 1. A miniaturized high-density coaxial communication cable is characterized by comprising a plurality of core wires (1), a shielding colloid layer (2), a wire mesh layer (3), a surrounding type outer wire layer (5), an outer shielding layer (6) and a wrapping layer (7); The core wire (1) comprises a copper core, a silver cladding and an insulating paint layer, wherein a silver cladding layer is sprayed outside the copper core, and an insulating paint layer is sprayed outside the silver cladding layer; A layer of copper powder is sprayed outside the core wires (1), a plurality of core wires (1) are coated with shielding colloid after the sprayed copper powder is dried, the core wires (1) are twisted before the shielding colloid is not solidified, and a shielding colloid layer (2) is formed after the shielding colloid is solidified; The shielding colloid layer (2) is externally wound with a wire mesh to form a wire mesh layer (3), and then an insulating wrapping layer (4) is wrapped outside the wire mesh layer (3) by precise dip coating and UV curing; The surrounding type outer line layer (5) comprises a plurality of flat outer lines, the flat outer lines comprise core outer lines and insulating outer layers, insulating paint is sprayed outside the core outer lines to form the insulating outer layers, the flat outer lines are parallel and wound outside the insulating wrapping layer (4), and the flat outer lines are coated with shielding colloid to enable the flat outer lines to be adhered to the insulating wrapping layer (4); and wrapping the flat outer wire with copper foil to form an outer shielding layer (6), and wrapping the outer shielding layer (6) by using a micro extrusion molding process to form a wrapping layer (7).
  2. 2. The miniaturized high-density coaxial communication cable according to claim 1, wherein the diameter of the copper core is 0.3-0.5mm, the thickness of the silver cladding is 0.02-0.03mm, the thickness of the insulating paint layer is 0.05-0.08mm, the thickness of copper powder sprayed outside the core wire (1) is 0.05-0.1mm, and the diameter of the core wire (1) after copper powder spraying is 0.45-0.65mm.
  3. 3. The miniaturized high-density coaxial communication cable according to claim 2, wherein the number of the core wires (1) is 15-30, the core wires (1) are stranded in a micro-stranding mode, the more the number of the core wires (1) is stranded, the longer the length of the core wires is required by one circle, and the diameter of the stranded core wires (1) is 3.0-8.0mm.
  4. 4. The miniaturized high-density coaxial communication cable according to claim 1, wherein the shielding colloid comprises, by weight, 15-20 parts of epoxy resin, 5-10 parts of silicone, 15-20 parts of acrylic acid, 10-15 parts of polyurethane, 15-20 parts of flake silver powder, 20-25 parts of flake copper powder, 5-8 parts of graphite, 1-2 parts of coupling agent, 1-2 parts of dispersing agent, 0.5-1.5 parts of defoamer and 0.5-1.0 parts of toughening agent; The flake silver powder and the flake copper powder are cut into flakes under the same conditions, the size of the flakes is (0.01-0.015) mm (0.02-0.025), and the thickness is less than 5 mu m; The core wires (1) are fully filled in gaps among the core wires (1) by the coated shielding colloid during stranding, and the shielding colloid is required to completely wrap all the core wires (1) and form a glue layer with the thickness of 1-2mm outwards after the core wires (1) are stranded.
  5. 5. The miniaturized high-density coaxial communication cable according to claim 1, wherein a plurality of insulating paint layers sprayed on the core wires (1) are internally provided with pigments, the insulating paint layers of different core wires (1) have different colors, and the insulating paint layers are wear-resistant insulating paint.
  6. 6. The miniaturized high-density coaxial communication cable according to claim 1, wherein the wire mesh layer (3) comprises an inner braid, a middle braid and an outer braid, both braided with copper wires, the middle braid being braided with an insulating tape; after the inner braiding layer is braided, brushing shielding colloid to permeate into gaps of the inner braiding layer and adhering the shielding colloid layer; after the middle braiding layer and the outer braiding layer are braided in sequence, shielding colloid is coated outside the outer braiding layer and is permeated on the middle braiding layer for adhesion.
  7. 7. The miniaturized high-density coaxial communication cable according to claim 1, wherein the core wires are flat copper wires, the thickness of the flat wires is 0.2-0.3mm, the width of the flat wires is 2-5mm, a plurality of the flat wires are uniformly distributed and wound on the insulating sheath layer, and the distance between adjacent flat wires is at least 3mm; the flat outer wires are woven into a mat shape by fine wires before being wound to maintain the spacing; the insulating paint for the flat outer line outer coating contains pigment which is used for displaying the color of the flat outer line.
  8. 8. A miniaturized high-density coaxial communication cable according to claim 7, wherein after a plurality of said flat outer wires are wound outside the insulating sheath (4), the gaps between the flat outer wires are painted with a shielding colloid a plurality of times so that the shielding colloid fills the gaps and so that the shielding colloid covers the flat outer wires and extends outwardly by 1.0-1.5mm.
  9. 9. The miniaturized high-density coaxial communication cable of claim 1, wherein the copper foil is wound clockwise one layer outside the flat outer wire and then wound counterclockwise one layer to form a double layer winding.

Description

Miniaturized high-density coaxial communication cable Technical Field The invention belongs to the technical field of coaxial communication cables, and particularly relates to a miniaturized high-density coaxial communication cable. Background Miniaturized high-density coaxial communication cable (miniature coaxial cable for short) has advantages of high shielding, low crosstalk and adaptation to narrow space. However, only one core wire or a plurality of core wires are often used, the multi-core interconnection scene of the medical endoscope and the high-speed data acquisition equipment cannot be adapted, the diameter of the coaxial communication cable is properly increased, and 15-30 core wires are configured, so that more precise and efficient data transmission is realized. However, such communication cables are susceptible to self-interference, and the signal interference and information distortion are caused by incomplete shielding under winding between the core wires. Disclosure of Invention The invention aims to provide a miniaturized high-density coaxial communication cable, which is characterized in that each core wire is subjected to self shielding design, the stranded core wires are filled with gaps and coated by shielding colloid with shielding effect, further shielding is realized, the surrounding type outer line design is realized, the interference degree between the core wires is greatly reduced, the gaps are filled by the shielding colloid, the transmission of interference signals is greatly reduced, and the problems that the shielding degree between the existing core wires is insufficient, the existing coaxial communication cable is not suitable for high-precision transmission and the like are solved. In order to solve the technical problems, the invention is realized by the following technical scheme: the invention relates to a miniaturized high-density coaxial communication cable, which comprises a plurality of core wires, a shielding colloid layer, a wire mesh layer, a surrounding type outer wire layer, an outer shielding layer and a wrapping layer; the core wire comprises a copper core, a silver cladding and an insulating paint layer, wherein a silver cladding layer is sprayed outside the copper core, and an insulating paint layer is sprayed outside the silver cladding layer; A layer of copper powder is sprayed outside the core wires, after the sprayed copper powder dries, a plurality of core wires are coated with shielding colloid, the core wires are twisted before the shielding colloid is not solidified, and a shielding colloid layer is formed after the shielding colloid is solidified; Winding a wire mesh outside the shielding colloid layer to form a wire mesh layer, and wrapping an insulating wrapping layer outside the wire mesh layer by using precise dip coating and UV curing; The surrounding type outer line layer comprises a plurality of flat outer lines, the flat outer lines comprise core outer lines and insulating outer layers, insulating paint is sprayed outside the core outer lines to form the insulating outer layers, the flat outer lines are parallel and wound outside the insulating wrapping layers, and the flat outer lines are coated with shielding colloid to enable the flat outer lines to be adhered to the insulating wrapping layers; And wrapping the flat outer wire with copper foil to form an outer shielding layer, and wrapping the outer shielding layer with a micro extrusion molding process to form a wrapping layer. The invention is further arranged that the diameter of the copper core is 0.3-0.5mm, the thickness of the silver cladding is 0.02-0.03mm, the thickness of the insulating paint layer is 0.05-0.08mm, the thickness of copper powder sprayed outside the core wire is 0.05-0.1mm, and the diameter of the core wire after copper powder is sprayed is 0.45-0.65mm. The invention is further characterized in that the number of the core wires is 15-30, the core wires are stranded in a micro-stranding mode, the length of the core wires required by one stranded loop is longer as the number of the core wires is increased, and the diameter of the stranded core wires is 3.0-8.0mm. The invention is further arranged that the shielding colloid comprises, by weight, 15-20 parts of epoxy resin, 5-10 parts of organic silicon, 15-20 parts of acrylic acid, 10-15 parts of polyurethane, 15-20 parts of flake silver powder, 20-25 parts of flake copper powder, 5-8 parts of graphite, 1-2 parts of coupling agent, 1-2 parts of dispersing agent, 0.5-1.5 parts of defoaming agent and 0.5-1.0 part of toughening agent; The flake silver powder and flake copper powder are cut into flakes under the same conditions, the flake size is 0.01-0.015mm 0.02-0.025mm, and the thickness is less than 5 mu m; The shielding colloid painted on the core wires during stranding is fully filled in gaps among the core wires, and the shielding colloid completely wraps all the core wires and forms a 1-2mm adhesive layer outwa