Small-diameter bending-resistant anti-signal-crosstalk multi-core control cable

Abstract

The utility model discloses a small-diameter bending-resistant anti-signal-crosstalk multi-core control cable, which comprises two power wire cores and two signal wire cores, the two power wire cores and the two signal wire cores are arranged in a cross shape and are jointly twisted with a para-position type wholly aromatic copolyamide stretched fiber filling core material to form a cable core, and each signal wire core is formed by two insulated wire cores in a pair twisting mode. The two signal wire cores are identical in stranding direction and different in stranding pitch, the axis connecting line of the two insulating wire cores of one signal wire core is parallel to the axis connecting line of the two power wire cores, and the axis connecting line of the two insulating wire cores of the other signal wire core is perpendicular to the axis connecting line of the two power wire cores. An ETFE resin wrapping antifriction layer, a TPU extruded inner sheath layer, a Kevlar mesh grid and a TPU extruded outer sheath layer are sequentially wrapped outside the cable core. The cable is beneficial to thin-diameter preparation, the bending resistance is better, the signal crosstalk phenomenon is effectively reduced, the stable electrical characteristic is ensured, and the durability is better.

Description

Technical Field

[0001] This application relates to the technical field of cables, and particularly relates to a multi-core control cable with a thin diameter, anti-bending property, and anti-signal crosstalk property. Background Art

[0002] In an automated industrial production line, multi-core cables are commonly used in robots, mobile drive systems, etc. The cable core is usually a circular cross-section structure formed by stranding a power line core, a signal line core, and a filling core material. The outer diameter is relatively large. Under normal working conditions, the multi-core cable needs to withstand repetitive bending actions. Ordinary multi-core cables have insufficient anti-bending performance. After repeated bending, the extrusion force from the filling core material is likely to cause deformation of the circular cross-section of the signal line core and the circular cross-section structure of the cable core. The extrusion force borne between the line cores is likely to cause wire breakage and core breakage. Moreover, if the signal line core adopts a non-shielded structure, noise between the signal line cores and from the power line core is extremely likely to cause signal crosstalk, resulting in poor signal transmission characteristics and seriously affecting the electrical characteristics. Utility Model Content

[0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by this application is to provide a multi-core control cable with a thin diameter, anti-bending property, and anti-signal crosstalk property, which is beneficial to the preparation of a thin diameter, has better anti-bending performance, effectively reduces the signal crosstalk phenomenon, ensures stable electrical characteristics, and has better durability.

[0004] The above technical problem is solved by the following technical solutions in this application.

[0005] The multi-core control cable with a thin diameter, anti-bending property, and anti-signal crosstalk property includes two power line cores and two signal line cores arranged in a cross shape and jointly stranded with a para-aramid drawn fiber filling core material to form a cable core. The para-aramid drawn fiber filling core material is coated with insulating lubricating grease on the outside. The signal line core is composed of two insulated wire cores twisted together. The outer diameter ratio of the two signal line cores is 0.9:1 to 1.2:1. The twisting directions of the two signal line cores are the same but the twist pitches are different. The axis connection line of the two insulated wire cores of one signal line core is parallel to the axis connection line of the two power line cores, and the axis connection line of the two insulated wire cores of the other signal line core is perpendicular to the axis connection line of the two power line cores. The outside of the cable core is sequentially coated with an ETFE resin wrapping anti-friction layer, a TPU extrusion inner sheath layer, a Kevlar braided mesh, and a TPU extrusion outer sheath layer. The outer diameter of the TPU extrusion outer sheath layer is 8 mm to 12 mm.

[0006] Preferably, the power line core includes a power line core conductor and an irradiated cross-linked low-density polyethylene insulating layer.

[0007] Preferably, the power line core conductor is composed of several tinned copper single wires with a diameter of 0.1 mm to 0.2 mm stranded together.

[0008] Preferably, the thickness of the irradiated cross-linked low-density polyethylene insulating layer is from 0.3 mm to 0.5 mm.

[0009] Preferably, the insulated wire core includes an inner conductor and an XLPE insulating layer.

[0010] Preferably, the inner conductor is composed of a plurality of tinned copper single wires with a wire diameter of 0.05 mm to 0.1 mm concentrically stranded.

[0011] Preferably, the thickness of the XLPE insulating layer is from 0.25 mm to 0.4 mm.

[0012] Preferably, the ETFE resin wrapping friction-reducing layer is a multi-layer overlapping wrapping structure of ETFE resin tapes, and the thickness of the ETFE resin tapes is from 8 μm to 20 μm.

[0013] Preferably, the Kevlar braided net is a structure in which inner and outer double layers of Kevlar wires are wound spirally in opposite directions, and the braiding density is not less than 95%.

[0014] Preferably, the thickness of the TPU extruded outer sheath layer is from 1 mm to 2 mm.

[0015] Advantages of the present application:

[0016] 1. By arranging the outer diameters of the two signal wire cores in a ratio of 0.9:1 to 1.2:1, and the two signal wire cores having the same lay direction but different lay lengths, it is beneficial to suppress signal crosstalk between the signal wire cores, beneficial to improving signal transmission characteristics, and ensuring the stability of electrical performance. The axial center connection line of the two insulated wire cores of one signal wire core is arranged parallel to the axial center connection line of the two power wire cores, and the axial center connection line of the two insulated wire cores of the other signal wire core is arranged perpendicular to the axial center connection line of the two power wire cores, which is beneficial to the preparation of a thinner diameter during stranding and cabling.

[0017] 2. A counterpoint type wholly aromatic copolyamide drawn fiber filling core material is added between the power wire core and the signal wire core to form a buffer to maintain the circular cross-sectional structure of the cable core. When the cable is repeatedly bent, it helps to slow down the extrusion pressure and lateral pressure. The counterpoint type wholly aromatic copolyamide drawn fiber filling core material is coated with insulating lubricating grease on the outside to improve the sliding property between the power wire core and the signal wire core, improve the bending resistance, reduce local stress concentration of each wire core, and inhibit wire breakage of the wire core conductor, with better durability.

[0018] 3. The ETFE resin wrapping friction-reducing layer has excellent sliding property, small sliding friction resistance, improves the flexibility and bending resistance of the cable, reduces local stress concentration of the cable core, and ensures the stability and balance of the cable core structure. Description of the Drawings

[0019] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1-power line core, 2-signal line core, 3-para-type fully aromatic copolyamide stretched fiber filling core material, 4-insulating line core, 5-ETFE resin wrapped anti-friction layer, 6-TPU extruded inner sheath layer, 7-Kevlar braided mesh, 8-TPU extruded outer sheath layer, 9-power line core conductor, 10-irradiated cross-linked low-density polyethylene insulation layer, 11-inner conductor, 12-XLPE insulation layer. DETAILED DESCRIPTION

[0022] The terms used in the implementation method part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The implementation method of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1 The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable of the embodiment of the present application includes two power cores 1 and two signal cores 2 arranged in a cross shape and twisted together with a para-type fully aromatic copolyamide stretched fiber filling core material 3 to form a cable core, and the para-type fully aromatic copolyamide stretched fiber filling core material 3 is coated with insulating lubricating grease on the outside. The power core 1 includes a power core conductor 9 and an irradiated cross-linked low-density polyethylene insulation layer 10. Specifically, the power core conductor 9 is composed of a plurality of tinned copper monofilaments with a diameter of 0.1 mm to 0.2 mm twisted together. The thickness of the irradiated cross-linked low-density polyethylene insulation layer 10 is 0.3 mm to 0.5 mm. The signal core 2 is composed of two insulated cores 4 twisted together, and the insulated core 4 includes an inner conductor 11 and an XLPE insulation layer 12. Specifically, the inner conductor 11 is composed of a plurality of tinned copper monofilaments with a diameter of 0.05 mm to 0.1 mm twisted together. The thickness of the XLPE insulation layer 12 is 0.25 mm to 0.4 mm. The outer diameter ratio of the two signal cores 2 is 0.9:1 to 1.2:1. The two signal cores 2 have the same twist direction and different twist pitches. The axis connecting the two insulating cores 4 of one signal core 2 is parallel to the axis connecting the two power cores 1, and the axis connecting the two insulating cores 4 of the other signal core 2 is perpendicular to the axis connecting the two power cores 1.

[0024] An ETFE resin wrapping antifriction layer 5, a TPU extrusion inner sheath layer 6, a Kevlar braided mesh 7 and a TPU extrusion outer sheath layer 8 are sequentially coated outside the cable core. The outer diameter of the TPU extrusion outer sheath layer 8 is 8 mm to 12 mm. The thickness of the TPU extrusion outer sheath layer 8 is 1 mm to 2 mm. In one embodiment, the ETFE resin wrapping antifriction layer 5 is a multi-layer overlapping wrapping structure of ETFE resin tapes, and the thickness of the ETFE resin tapes is 8 μm to 20 μm. In one embodiment, the Kevlar braided mesh 7 is an inner and outer double-layer Kevlar wire reverse spiral winding and braiding structure with a braiding density of not less than 95%.

[0025] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and are not intended to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Thin-diameter anti-bending and anti-signal crosstalk multi-core control cable, characterized by: The invention comprises two power line cores (1) and two signal line cores (2) arranged in a cross shape and twisted together with a para-type fully aromatic copolyamide stretched fiber filling core material (3) to form a cable core, wherein the para-type fully aromatic copolyamide stretched fiber filling core material (3) is coated with insulating lubricating grease on the outside, the signal line core (2) is formed by twisting two insulating line cores (4) in pairs, the outer diameter ratio of the two signal line cores (2) is 0.9:1 to 1.2:1, the two signal line cores (2) have the same twist direction and different twist lengths, and one The axis connecting the two insulating cores (4) of the signal core (2) is arranged in parallel with the axis connecting the two power cores (1), and the axis connecting the two insulating cores (4) of the other signal core (2) is arranged vertically with the axis connecting the two power cores (1). The cable core is coated with an ETFE resin wrapped anti-friction layer (5), a TPU extruded inner sheath layer (6), a Kevlar braided mesh (7) and a TPU extruded outer sheath layer (8) in sequence, and the outer diameter of the TPU extruded outer sheath layer (8) is 8 mm to 12 mm.

2. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 1 is characterized in that: The power line core (1) comprises a power line core conductor (9) and a radiation cross-linked low-density polyethylene insulation layer (10).

3. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 2 is characterized by: The power line core conductor (9) is composed of a plurality of tinned copper monofilaments with a diameter of 0.1 mm to 0.2 mm twisted together.

4. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 2 is characterized by: The thickness of the radiation cross-linked low-density polyethylene insulation layer (10) is 0.3 mm to 0.5 mm.

5. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 1 is characterized in that: The insulated wire core (4) comprises an inner conductor (11) and an XLPE insulation layer (12).

6. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 5 is characterized by: The inner conductor (11) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.1 mm, which are coaxially twisted.

7. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 5 is characterized by: The XLPE insulation layer (12) has a thickness of 0.25 mm to 0.4 mm.

8. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 1 is characterized by: The ETFE resin wrapped anti-friction layer (5) is a multi-layer overlapping wrapped structure of ETFE resin tapes, and the thickness of the ETFE resin tapes is 8 μm to 20 μm.

9. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 1 is characterized by: The Kevlar braided net (7) is a braided structure in which inner and outer double layers of Kevlar wires are mutually spirally wound in opposite directions, and the braiding density is not less than 95%.

10. The thin-diameter anti-bending and anti-signal crosstalk multi-core control cable according to claim 1 is characterized by: The thickness of the TPU extruded outer sheath layer (8) is 1 mm to 2 mm.

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