CN217239097U

CN217239097U - Bending-resistant anti-breaking coaxial cable

Info

Publication number: CN217239097U
Application number: CN202220409266.1U
Authority: CN
Inventors: 黄桂领; 姚汪宁; 王世军; 王超; 王洪超
Original assignee: Zhejiang Zhongda Yuantong Cable Research Co ltd
Current assignee: Zhejiang Zhongda Yuantong Cable Research Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-19
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a resistant type of bucking prevents broken string coaxial cable, a plurality of tinned copper monofilaments are around strengthening the outside transposition of core at the center and are constituteed the inner conductor, the outer cladding crosslinked fluororubber longitudinal hole insulator in proper order of inner conductor, copper is moulded composite band and is around the package shielding layer, the copper line is around package internal shield layer, the copper line is around package external shield layer and polyurethane oversheath, the copper line is the one-way spiral winding of a plurality of inlayer tinned copper wires around package internal shield layer and forms, the copper line is the one-way spiral winding of a plurality of outer tinned copper stranded wires around package external shield layer and forms, outer tinned copper stranded wire is a plurality of outer tinned copper wires transposition components, copper is moulded composite band and all is provided with thermoplastic polyurethane adhesive linkage around package shielding layer surface and polyurethane oversheath internal surface. The cable is not easy to deform and break, the copper wire shielding layer is not easy to loosen, and the shielding performance is stable.

Description

Bending-resistant anti-breaking coaxial cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a disconnection coaxial cable is prevented to resistant flexible type.

Background

Coaxial cables are one of the main varieties of wire cables. The coaxial cable needs to have good flexibility and shielding performance. Industrial applications the field environment is complex and the radiation or conduction of electromagnetic noise (EMI) can seriously interfere with the proper operation of the equipment. In this process, an important carrier for electromagnetic noise propagation is various cables used in production line equipment. For example, in an automated industrial manufacturing line, electrical connection and control of small robots, electronic machines, and the like are required to be applied to a coaxial cable having high flexibility and bending resistance, and such a coaxial cable must also have good electrical characteristics for long-distance transmission. However, after a common coaxial cable is repeatedly bent for a long time, the shielding layer of the copper wire is prone to be loosened, so that the shielding density is reduced, the shielding effect is unstable, and the load stress applied to the conductor in the bending process is prone to cause the conductor to be deformed and broken, so that the electrical characteristics are greatly influenced, and the durability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a resistant flexible type prevents broken string coaxial cable, and the pliability is good, and resistant bending property is excellent, is difficult for appearing the conductor and warp disconnected silk and take place, and copper line shielding layer is difficult for appearing loosely, and shielding performance is stable, and the durability is better.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

The deflection-resistant anti-breakage coaxial cable comprises a center reinforcing core material, wherein the center reinforcing core material is formed by twisting a plurality of alignment type wholly aromatic copolyamide drawn fibers and stainless steel wires, a plurality of tinned copper monofilaments are twisted around the outside of the center reinforcing core material to form an inner conductor, a cross-linked fluororubber longitudinal hole insulator, a copper-plastic composite tape wrapping shielding layer, a copper wire wrapping inner shielding layer, a copper wire wrapping outer shielding layer and a polyurethane outer sheath are sequentially coated outside the inner conductor, the copper wire wrapping inner shielding layer is formed by unidirectional spiral winding of a plurality of inner tinned copper wires, the copper wire wrapping outer shielding layer is formed by unidirectional spiral winding of a plurality of outer tinned copper stranded wires, the outer tinned copper stranded wires are formed by twisting a plurality of outer tinned copper wires, the diameter of the inner tinned copper wires is larger than that of the outer tinned copper wires and smaller than that of the outer tinned copper stranded wires, the winding directions of the outer tinned copper stranded wire and the inner tinned copper wire are opposite, the winding distances of the inner tinned copper wire and the outer tinned copper stranded wire are the same, and thermoplastic polyurethane bonding layers are arranged on the outer surface of the copper-plastic composite tape winding shielding layer and the inner surface of the polyurethane outer sheath.

Preferably, the center reinforcing core material lay length is different from the inner conductor lay length, the center reinforcing core material lay length is five to fifteen times of the outer diameter of the inner conductor, and the inner conductor lay length is four to twenty times of the outer diameter of the inner conductor.

Preferably, the diameter of the tin-plated copper monofilament is 0.02mm to 0.16 mm.

Preferably, the outer diameter of the inner conductor is 0.5mm to 1.6 mm.

Preferably, the cross-linked fluororubber longitudinal hole insulator is formed with a plurality of longitudinal holes on a cross-linked fluororubber body, and the thickness of the cross-linked fluororubber longitudinal hole insulator is not less than 0.35mm and not more than 1.5 mm.

Preferably, the copper-plastic composite tape lapping shielding layer is a copper-plastic composite tape one-way spiral lapping and covering lapping structure, and the copper-plastic composite tape comprises an outer copper foil layer and an inner PET (polyethylene terephthalate) film layer.

Preferably, the thickness of the thermoplastic polyurethane bonding layer is 4 μm to 10 μm.

Preferably, the diameter ratio of the outer-layer tinned copper stranded wire to the inner-layer tinned copper wire is 2:1 to 5:1, the difference between the spiral angle of the outer-layer tinned copper stranded wire and the spiral angle of the inner-layer tinned copper wire is 5 degrees to 20 degrees, the diameter of the inner-layer tinned copper wire is 0.08mm to 0.12mm, and the diameter of the outer-layer tinned copper wire is 0.04mm to 0.1 mm.

Preferably, the stainless steel wire has a wire diameter of 0.01 to 0.04 mm.

The utility model has the advantages that:

1. the twisting pitch of the central strengthening core material is different from that of the inner conductor, compared with the same twisting pitch, the central strengthening core material effectively prevents the central line of the central strengthening core material and the inner conductor from shifting, the circular section of the inner conductor is easy to keep, the flexibility is improved, the bending resistance is better, the central strengthening core material is formed by twisting the para-type wholly aromatic copolyamide drawn fiber and a stainless steel wire, the tensile elastic modulus of the para-type wholly aromatic copolyamide drawn fiber is large, the tensile resistance of the central strengthening core material is improved, the tensile strength of the inner conductor is improved, the occurrence of deformation and broken wire is not easy to occur, the inner conductor is enabled to have high flexibility, the bending resistance of the cable is enhanced, and the durability is better.

2. Through copper-plastic composite belt around package shielding layer, copper wire around package inner shield layer and copper wire around package outer shield layer form the shielding conductor jointly, copper-plastic composite belt helps reducing the copper wire around the stress concentration of package inner shield layer around the package shielding layer, reduces the moment of torsion power, copper-plastic composite belt can effectually fill the copper wire around the package inner shield layer space around the package shielding layer, reinforcing shielding performance, reducing the signal attenuation, improve the interference killing feature, ensure reliable and stable shielding performance.

3. By optimizing the wire diameter ratio of the outer-layer tinned copper stranded wire to the inner-layer tinned copper wire to be 2:1 to 5:1, the outer-layer tinned copper stranded wire and the inner-layer tinned copper wire are opposite in winding direction and same in winding distance, the bending resistance of the cable is improved, wire breakage and wire breakage are not prone to occurring in the process of repeated twisting and bending, the durability is better, the difference between the spiral angle of the outer-layer tinned copper stranded wire and the spiral angle of the inner-layer tinned copper wire is 5-20 degrees, the signal attenuation is reduced, and the anti-interference capability is enhanced.

4. Through set up thermoplastic polyurethane adhesive linkage around package shielding layer surface at the compound area of copper plastics, make copper foil layer and copper line be connected around package inner shield layer driving fit, set up thermoplastic polyurethane adhesive linkage through polyurethane oversheath internal surface, the copper line bonds integratively with the polyurethane oversheath around package outer shield layer, effectually prevent that the copper line from easily taking place loose problem around package inner and outer shielding layer tinned copper wire and tinned copper stranded wire after experiencing the repetitive bending, help improving the pliability and the resistant bending characteristic of cable, guarantee the stability of noise shielding, the durability is better.

5. The cross-linked fluororubber longitudinal hole insulator is coated outside the inner conductor, so that the improvement of lateral pressure during bending is facilitated, the flexibility and the bending resistance of the cable are improved, a plurality of longitudinal holes are formed in the cross-linked fluororubber body, the weight of the material of the cable insulation layer is greatly reduced on the basis of keeping the distance between electric insulation gaps, and the use cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Reference numerals: 1-a central reinforced core material, 2-an inner conductor, 3-a cross-linked fluororubber longitudinal hole insulator, 4-a copper-plastic composite tape wrapped shielding layer, 5-a copper wire wrapped inner shielding layer, 6-a copper wire wrapped outer shielding layer and 7-a polyurethane outer sheath.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the bending-resistant type disconnection-preventing coaxial cable according to an embodiment of the present invention includes a center reinforcing core material 1, wherein the center reinforcing core material 1 is formed by twisting a plurality of para-type wholly aromatic copolyamide drawn fibers and stainless steel wires, specifically, the stainless steel wires have a wire diameter of 0.01mm to 0.04mm, and further, the center reinforcing core material 1 has an outer diameter of 0.1mm to 0.8 mm. The tin-plated copper monofilaments surround the outside of the central reinforced core material 1 and are twisted to form the inner conductor 2, specifically, the wire diameter of the tin-plated copper monofilaments is 0.02mm to 0.16mm, and further, the outer diameter of the inner conductor 2 is 0.5mm to 1.6 mm. Preferably, the center reinforcing core material 1 has a different lay length from the inner conductor 2, the lay length of the center reinforcing core material 1 is five to fifteen times of the outer diameter of the inner conductor 2, and the lay length of the inner conductor 2 is four to twenty times of the outer diameter of the inner conductor 2.

The outer portion of the inner conductor 2 is sequentially coated with a cross-linked fluororubber longitudinal hole insulator 3, a copper-plastic composite tape wrapping shielding layer 4, a copper wire wrapping inner shielding layer 5, a copper wire wrapping outer shielding layer 6 and a polyurethane outer sheath 7. Specifically, the cross-linked fluororubber longitudinal hole insulator 3 is formed with a plurality of longitudinal holes on a cross-linked fluororubber body, and the thickness of the cross-linked fluororubber longitudinal hole insulator 3 is not less than 0.35mm and not more than 1.5 mm. The outer surface of the copper-plastic composite belt wrapping shielding layer 4 and the inner surface of the polyurethane outer sheath 7 are both provided with thermoplastic polyurethane bonding layers, and further, the thickness of each thermoplastic polyurethane bonding layer is 4-10 micrometers. In one embodiment, the copper-plastic composite tape lapping and shielding layer 4 is a copper-plastic composite tape one-way spiral lapping and covering lapping structure, and the copper-plastic composite tape comprises an outer copper foil layer and an inner PET film layer. The copper wire wrapping inner shielding layer 5 is formed by winding a plurality of inner tinned copper wires in a unidirectional spiral mode, the copper wire wrapping outer shielding layer 6 is formed by winding a plurality of outer tinned copper stranded wires in a unidirectional spiral mode, the outer tinned copper stranded wires are formed by twisting a plurality of outer tinned copper wires, the wire diameter of the inner tinned copper wires is larger than the wire diameter of the outer tinned copper stranded wires and smaller than the wire diameter of the outer tinned copper stranded wires, the outer tinned copper stranded wires and the inner tinned copper wires are opposite in winding direction and same in winding distance, further, the wire diameter ratio of the outer tinned copper stranded wires to the wire diameter ratio of the inner tinned copper stranded wires is 2: 1-5: 1, the difference between the spiral angle of the outer tinned copper stranded wires and the spiral angle of the inner tinned copper wires is 5-20 degrees, the wire diameter of the inner tinned copper wires is 0.08-0.12 mm, and the wire diameter of the outer tinned copper wires is 0.04-0.1 mm.

The preparation method of the flexible-type disconnection-preventing coaxial cable comprises the following steps:

the method comprises the following steps: obtaining a center reinforced core material through a twisting process;

step two: forming an inner conductor outside the center reinforced core material through a twisting process;

step three: coating a cross-linked fluororubber longitudinal hole insulator outside the inner conductor by an extrusion coating process;

step four: sequentially forming a copper-plastic composite tape lapping shielding layer, a copper wire lapping inner shielding layer and a copper wire lapping outer shielding layer outside the cross-linked fluororubber longitudinal hole insulator through a winding process;

step five: and forming a polyurethane outer sheath outside the copper wire lapping outer shielding layer through an extrusion process to prepare the coaxial cable.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. Bending-resistant disconnection-preventing coaxial cable, which is characterized in that: the core material comprises a center reinforced core material (1), wherein the center reinforced core material (1) is formed by twisting a plurality of counterpoint type aromatic copolyamide drawn fibers and stainless steel wires, a plurality of tinned copper monofilaments are wound around the center reinforced core material (1) to form an inner conductor (2), the outer part of the inner conductor (2) is sequentially coated with a cross-linked fluororubber longitudinal hole insulator (3), a copper-plastic composite tape winding shielding layer (4), a copper wire winding inner shielding layer (5), a copper wire winding outer shielding layer (6) and a polyurethane outer sheath (7), the copper wire winding inner shielding layer (5) is formed by unidirectional spiral winding of a plurality of inner tinned copper wires, the copper wire winding outer shielding layer (6) is formed by unidirectional spiral winding of a plurality of outer tinned copper wires, the outer tinned copper wires are twisted by a plurality of outer tinned copper wires, the diameter of the inner tinned copper wires is larger than that of the outer tinned copper wires and smaller than that of the outer copper wires, the winding directions of the outer-layer tinned copper stranded wire and the inner-layer tinned copper wire are opposite and the winding distances of the outer-layer tinned copper stranded wire and the inner-layer tinned copper wire are the same, and thermoplastic polyurethane bonding layers are arranged on the outer surface of the copper-plastic composite tape winding shielding layer (4) and the inner surface of the polyurethane outer sheath (7).

2. The flex-resistant, breakage-resistant coaxial cable of claim 1 wherein: the lay length of the central reinforced core material (1) is different from that of the inner conductor (2), the lay length of the central reinforced core material (1) is five to fifteen times of the outer diameter of the inner conductor (2), and the lay length of the inner conductor (2) is four to twenty times of the outer diameter of the inner conductor (2).

3. The flex-resistant, break-resistant coaxial cable of claim 1, wherein: the diameter of the tinned copper monofilament is 0.02mm to 0.16 mm.

4. The flex-resistant, break-resistant coaxial cable of claim 1, wherein: the outer diameter of the inner conductor (2) is 0.5mm to 1.6 mm.

5. The flex-resistant, break-resistant coaxial cable of claim 1, wherein: the cross-linked fluororubber longitudinal hole insulator (3) is formed with a plurality of longitudinal holes on a cross-linked fluororubber body, and the thickness of the cross-linked fluororubber longitudinal hole insulator (3) is not less than 0.35mm and not more than 1.5 mm.

6. The flex-resistant, break-resistant coaxial cable of claim 1, wherein: the copper-plastic composite tape lapping shielding layer (4) is of a copper-plastic composite tape one-way spiral lapping and covering lapping structure, and the copper-plastic composite tape comprises a copper foil layer on the outer side and a PET film layer on the inner side.

7. The flex-resistant, break-resistant coaxial cable of claim 1, wherein: the thickness of the thermoplastic polyurethane bonding layer is 4-10 mu m.

8. The flex-resistant, break-resistant coaxial cable of claim 1, wherein: the diameter ratio of the outer layer tinned copper stranded wire to the inner layer tinned copper wire is 2: 1-5: 1, the difference between the spiral angle of the outer layer tinned copper stranded wire and the spiral angle of the inner layer tinned copper wire is 5-20 degrees, the diameter of the inner layer tinned copper wire is 0.08-0.12 mm, and the diameter of the outer layer tinned copper wire is 0.04-0.1 mm.

9. The flex-resistant, break-resistant coaxial cable of claim 1, wherein: the wire diameter of the stainless steel wire is 0.01mm to 0.04 mm.