CN217086239U

CN217086239U - Small-diameter light differential signal multi-core cable

Info

Publication number: CN217086239U
Application number: CN202220292958.2U
Authority: CN
Inventors: 王洪超; 邱金波; 王超; 姚汪宁; 黄桂领
Original assignee: Zhejiang Zetastone Special Cable Co ltd
Current assignee: Zhejiang Zetastone Special Cable Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-29
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a thin light differential signal multicore cable of footpath, including the power sinle silk, the outside cladding of power sinle silk has first conductive fiber winding shielding layer, eight inlayer differential signal sinle silks form inlayer sinle silk body around the outside equipartition of first conductive fiber winding shielding layer, the outside cladding of inlayer sinle silk body has second conductive fiber winding shielding layer, fourteen outer differential signal sinle silks form outer sinle silk body around the outside equipartition of second conductive fiber winding shielding layer, the outside cladding of outer sinle silk body has polyester fiber plain weave around the covering, third conductive fiber winding shielding layer and polyurethane oversheath, polyurethane oversheath external diameter is 4.8mm to 6.5 mm. The multi-core cable is balanced in structure, small-diameter preparation is facilitated, signal transmission characteristics are stable, light and lightweight manufacturing is achieved by removing the metal shielding layer, and stability of electrical characteristics of the cable is guaranteed.

Description

Small-diameter light differential signal multi-core cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a thin and light differential signal multicore cable of footpath.

Background

Electromagnetic noise environments tend to be quite complex in industrial applications, and the radiation or conduction (EMI) of electromagnetic noise can significantly 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. Some of them are noise sources and some are disturbed objects. One very important way to combat electromagnetic noise interference on electrical lines is to use shielded cables. Shielded electrical cables are used in high speed data transmission applications involving electromagnetic interference (EMI) and/or Radio Frequency Interference (RFI). Electrical signals routed through shielded electrical cables may radiate less EMI/RFI to the external environment than electrical signals routed through unshielded electrical cables. Electrical signals transmitted through shielded cables may be better protected from environmental EMI/RFI than signals through unshielded cables. In shielded cable, low pressure differential signal sinle silk is usually arranged in pairs to the transmission difference signal, however, the low pressure differential signal sinle silk adopts flat differential signal sinle silk more, and the major and minor axis proportion design of differential signal sinle silk is unfavorable for the preparation of thin footpath, and the cable structure equilibrium is poor, and signal transmission characteristic is unstable, and then influences the electrical characteristics of cable.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a thin footpath lightweight difference signal multicore cable, and cable structure is balanced, does benefit to thin footpath and changes preparation, and signal transmission characteristic is stable, realizes light lightweight preparation through getting rid of the metallic shield layer, guarantees the stability of cable electrical characteristics.

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

The small-diameter light differential signal multi-core cable comprises a power core, wherein a first conductive fiber winding shielding layer is coated outside the power core, eight inner-layer differential signal cores are uniformly distributed around the first conductive fiber winding shielding layer to form an inner-layer core body, a second conductive fiber winding shielding layer is coated outside the inner-layer core body, fourteen outer-layer differential signal cores are uniformly distributed around the second conductive fiber winding shielding layer to form an outer-layer core body, a polyester fiber plain weave wrapping layer, a third conductive fiber winding shielding layer and a polyurethane outer sheath are coated outside the outer-layer core body, the outer diameter of the power core is 1mm to 2mm, the outer diameters of the inner-layer differential signal core and the outer-layer differential signal core are 0.5mm to 1.5mm, and the outer diameter of the power core is larger than the outer diameters of the inner-layer differential signal core and the outer-layer differential signal core, the outer diameter of the polyurethane outer sheath is 4.8mm to 6.5 mm.

Preferably, the power supply wire core comprises a power supply conductor and an FEP insulating layer, and insulating lubricating grease is filled between the power supply conductor and the FEP insulating layer.

Preferably, the power conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.05mm to 0.08 mm.

Preferably, the inner layer differential signal wire core and the outer layer differential signal wire core both comprise an inner conductor and a foamed polyethylene insulating layer, and insulating lubricating grease is filled between the inner conductor and the foamed polyethylene insulating layer.

Preferably, the inner conductor is formed by twisting a plurality of tinned copper wires with the diameter of 0.02mm to 0.04mm and a plurality of para-type wholly aromatic copolyamide drawn fibers.

Preferably, the first conductive fiber winding shielding layer, the second conductive fiber winding shielding layer and the third conductive fiber winding shielding layer are cylindrical supporting net bodies formed by lapping and weaving inner and outer double-layer aramid twisted wires in a reverse spiral mode, a plurality of conductive fiber bundles are uniformly distributed on the supporting net bodies in the circumferential direction, and the conductive fiber bundles are formed by stranding a plurality of polyacrylonitrile-based carbon fibers and coating copper conductive coatings.

Preferably, the polyacrylonitrile-based carbon fiber has a linear diameter of not more than 25 μm.

Preferably, the wrapping layer thickness of the polyester fiber plain woven cloth is 0.1mm to 0.3 mm.

Preferably, the polyester fiber plain cloth wrapping layer is of a polyester fiber plain cloth spiral wrapping structure.

Preferably, the inner surface of the polyurethane outer sheath is provided with a thermoplastic polyurethane bonding layer.

The utility model has the advantages that:

1. the inner layer differential signal wire core and the outer layer differential signal wire core which adopt the coaxial wire core structure are uniformly distributed outside the power supply wire core in a layered mode, the circular cross section of the cable is kept, the diameter thinning manufacturing is facilitated, the cable structure is balanced and stable, the lateral pressure and the extrusion force when the bending is borne by each wire core are reduced, the stress concentration inside the cable is relieved, the wire core breakage and core breaking are reduced, and the electrical characteristics and the safety and reliability of the cable are ensured.

2. The first conductive fiber winding shielding layer, the second conductive fiber winding shielding layer and the third conductive fiber winding shielding layer form interlayer shielding, the signal crosstalk phenomenon between wire cores is greatly weakened, the anti-interference capacity is improved, the differential signal transmission rate and the signal transmission stability are ensured, the stable electrical characteristics of the cable are powerfully ensured, each shielding layer is a cylindrical supporting net body formed by weaving double-layer aramid twisted wires, the high strength and the high modulus are achieved, the flexibility of the cable is better, the conductive fiber bundles are distributed on the supporting net body and are formed by twisting polyacrylonitrile-based carbon fibers and coating copper conductive coatings, metal material shielding layers can be effectively replaced, the stable shielding performance is ensured, the weight is reduced, the cost is reduced, and the thin-diameter light-weight production is realized.

3. The inner conductor is formed by twisting a tinned copper wire and a para-type wholly aromatic copolyamide drawn fiber, the para-type wholly aromatic copolyamide drawn fiber improves the tensile strength of the inner conductor, improves the bending resistance, is not easy to break wires and cores, and is durable in use.

Drawings

Fig. 1 is a schematic sectional structure diagram of an embodiment of the present invention.

In the figure: 1-power supply wire core, 2-first conductive fiber winding shielding layer, 3-inner layer differential signal wire core, 4-second conductive fiber winding shielding layer, 5-outer layer differential signal wire core, 6-polyester fiber plain woven cloth winding layer, 7-third conductive fiber winding shielding layer, 8-polyurethane outer sheath, 9-inner conductor, 10-foamed polyethylene insulating layer, 11-power supply conductor and 12-FEP insulating layer.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a thin and light differential signal multicore cable, including power core 1, power core 1 external diameter is 1mm to 2mm, specific theory, power core 1 includes power conductor 11 and FEP insulating layer 12, power conductor 11 with it has insulating lubricating grease to fill between FEP insulating layer 12, and is further, power conductor 11 constitutes for a plurality of diameters 0.05mm to 0.08mm tinned copper monofilament transposition with one heart. The outside cladding of power sinle silk 1 has first conductive fiber winding shielding layer 2, and eight inlayer differential signal sinle silks 3 centers on the outside equipartition of first conductive fiber winding shielding layer 2 forms inlayer line core. The outside cladding of inlayer wire core has second conductive fiber winding shielding layer 4, and fourteen outer differential signal sinle silks 5 centers on the outside equipartition of second conductive fiber winding shielding layer 4 forms outer wire core, specific saying so, inlayer differential signal sinle silk 3 with outer differential signal sinle silk 5 all includes inner conductor 9 and foaming polyethylene insulating layer 10, inner conductor 9 with it has insulating lubricating grease to fill between the foaming polyethylene insulating layer 10. Further, the inner conductor 9 is formed by twisting a plurality of tinned copper wires with the diameter of 0.02mm to 0.04mm and a plurality of para-type wholly aromatic copolyamide drawn fibers. The outer diameter of the power core 1 is larger than the outer diameters of the inner layer differential signal core 3 and the outer layer differential signal core 5, and the outer diameters of the inner layer differential signal core 3 and the outer layer differential signal core 5 are both 0.5mm to 1.5 mm.

The outer layer wire core body is coated with a polyester fiber plain weave wrapping layer 6, a third conductive fiber winding shielding layer 7 and a polyurethane outer sheath 8, and further, the inner surface of the polyurethane outer sheath 8 is provided with a thermoplastic polyurethane bonding layer. Specifically speaking, first conductive fiber twines shielding layer 2, second conductive fiber twines shielding layer 4 with third conductive fiber twines shielding layer 7 and is inside and outside double-deck aramid fiber twisted wire each other for reverse spiral is around the package and weaves formation cylinder support dictyosome, evenly laid a plurality of conductive fiber bundles in circumference on the support dictyosome, conductive fiber bundles are that a plurality of polyacrylonitrile base carbon fiber strand and scribble copper conductive coating and form, and is further, polyacrylonitrile base carbon fiber line footpath is no longer than 25 mu m. In one embodiment, the polyester fiber plain cloth wrapping layer 6 is a polyester fiber plain cloth spiral wrapping structure. The thickness of the polyester fiber plain weave cloth wrapping layer 6 is 0.1mm to 0.3 mm. The outer diameter of the polyurethane outer sheath 8 is 4.8mm to 6.5 mm.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. Thin-diameter lightweight differential signal multi-core cable is characterized in that: the power supply cable comprises a power supply cable core (1), wherein a first conductive fiber winding shielding layer (2) is coated outside the power supply cable core (1), eight inner layer differential signal cable cores (3) surround the first conductive fiber winding shielding layer (2) and are uniformly distributed outside to form an inner layer cable core body, a second conductive fiber winding shielding layer (4) is coated outside the inner layer cable core body, fourteen outer layer differential signal cable cores (5) surround the second conductive fiber winding shielding layer (4) and are uniformly distributed outside to form an outer layer cable core body, a polyester fiber plain weave winding layer (6), a third conductive fiber winding shielding layer (7) and a polyurethane outer sheath (8) are coated outside the outer layer cable core body, the outer diameter of the power supply cable core (1) is 1mm to 2mm, and the outer diameters of the inner layer differential signal cable cores (3) and the outer layer differential signal cable cores (5) are both 0.5mm to 1.5mm, the outer diameter of the power supply wire core (1) is larger than the outer diameters of the inner layer differential signal wire core (3) and the outer layer differential signal wire core (5), and the outer diameter of the polyurethane outer sheath (8) is 4.8mm to 6.5 mm.

2. The small-diameter light-weight differential signal multi-core cable according to claim 1, wherein: the power supply wire core (1) comprises a power supply conductor (11) and an FEP insulating layer (12), and insulating lubricating grease is filled between the power supply conductor (11) and the FEP insulating layer (12).

3. The small-diameter light-weight differential signal multi-core cable according to claim 2, wherein: the power conductor (11) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.05mm to 0.08 mm.

4. The small-diameter light-weight differential signal multi-core cable according to claim 1, wherein: the inner layer differential signal cable core (3) and the outer layer differential signal cable core (5) comprise inner conductors (9) and foamed polyethylene insulation layers (10), and insulating lubricating grease is filled between the inner conductors (9) and the foamed polyethylene insulation layers (10).

5. The small-diameter light-weight differential signal multi-core cable according to claim 4, wherein: the inner conductor (9) is formed by twisting a plurality of tinned copper wires with the diameter of 0.02mm to 0.04mm and a plurality of para-type wholly aromatic copolyamide drawn fibers.

6. The small-diameter light-weight differential signal multi-core cable according to claim 1, wherein: first conductive fiber winding shielding layer (2), second conductive fiber winding shielding layer (4) with third conductive fiber winding shielding layer (7) are inside and outside double-deck aramid fiber twisted wire and each other for reverse spiral around the package weave formation cylinder support dictyosome, evenly laid a plurality of conductive fiber bundles in circumference on the support dictyosome, conductive fiber bundles is that a plurality of polyacrylonitrile base carbon fiber strands and coats copper conductive coating and form.

7. The small-diameter light-weight differential signal multi-core cable according to claim 6, wherein: the wire diameter of the polyacrylonitrile-based carbon fiber is not more than 25 μm.

8. The small-diameter light-weight differential signal multi-core cable according to claim 1, wherein: the thickness of the polyester fiber plain weave fabric lapping layer (6) is 0.1mm to 0.3 mm.

9. The small-diameter light-weight differential signal multi-core cable according to claim 1, wherein: the polyester fiber plain weave lapping layer (6) is of a polyester fiber plain weave spiral lapping structure.

10. The small-diameter light-weight differential signal multi-core cable according to claim 1, wherein: the inner surface of the polyurethane outer sheath (8) is provided with a thermoplastic polyurethane bonding layer.