Torsion-resistant anti-twisting and anti-loosening total shielding control cable

Abstract

The utility model discloses a torsion-resistant anti-twisting loosening type total shielding control cable, which comprises a cable core formed by twisting a control wire core, five power wire cores and a para-position type wholly aromatic copolyamide stretching fiber core material, the cable core is sequentially coated with a PTFE semi-directional belt outer wrapping antifriction layer, an aluminum-plastic composite belt wrapping total shielding layer, a polyurethane elastomer inner sheath layer, an AFRP reinforced wrapping layer and a polyurethane elastomer outer sheath layer, each control wire core is formed by back-twisting and twisting two insulating wire cores, the twisting pitch is 6-10 mm, each power wire core comprises a power wire core conductor and an ETFE insulating layer, and each power wire core comprises a power wire core conductor and a sheath layer. The outer diameter of the power wire core does not exceed 80% of the outer diameter of the insulating wire core, the outer diameter of the power wire core conductor is larger than the outer diameter of the inner conductor, and the thickness of the XLPE insulating layer is not smaller than two times of the thickness of the ETFE insulating layer. According to the cable, the torsion resistance of the control wire cores is improved, the control wire cores are effectively prevented from loosening, the core and the wire are prevented from being broken, and the durability is improved.

Description

Technical Field

[0001] This application relates to the technical field of cables, and particularly to a torsion-resistant, anti-twisting and anti-loosening type total shield control cable. Background Art

[0002] On automated industrial production lines, multi-core cables are commonly used in robots, mobile drive systems, etc. Multi-core cables need to have good flexibility and shielding performance, and must also have good electrical characteristics for long-distance transmission. However, in a normal working environment, the cable needs to withstand repeated torsion and bending. In general multi-core cable control cores and power cores are stranded in the same layer. The outer diameter sizes of each core are different, and the torsion resistance is poor. The control cores are twisted pairs and are prone to loosening. Compared with the power cores, they are more likely to bear local stress and break the wire or core, and are not durable. 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 torsion-resistant, anti-twisting and anti-loosening type total shield control cable, optimize the outer diameter size ratio of the control core and the power core, slow down the local stress concentration of the control core, help improve the torsion resistance characteristics of the control core, effectively prevent the control core from loosening, is beneficial to suppressing signal crosstalk, preventing wire breakage and core breakage, and improving the durability and applicability.

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

[0005] The torsion-resistant, anti-twisting and anti-loosening type total shield control cable includes a control core and five power cores that are jointly stranded with a para-position type wholly aromatic copolyamide drawn fiber core material to form a cable core. An outer wrap friction reduction layer of PTFE semi-oriented tape, an overall shield layer wrapped with an aluminum-plastic composite tape, a polyurethane elastomer inner sheath layer, an AFRP reinforcement wrap layer, and a polyurethane elastomer outer sheath layer are sequentially coated outside the cable core. The control core is formed by untwisting and stranding two insulated cores with a lay length of 6 mm to 10 mm. The insulated core includes an inner conductor and an XLPE insulation layer. The stranding direction of the insulated core is the same as the stranding direction of the cable core and the winding direction of the outer wrap friction reduction layer of PTFE semi-oriented tape. The power core includes a power core conductor and an ETFE insulation layer. The outer diameter of the power core does not exceed 80% of the outer diameter of the insulated core. The outer diameter of the power core conductor is greater than the outer diameter of the inner conductor. The thickness of the XLPE insulation layer is not less than 2 times the thickness of the ETFE insulation layer. The outer diameter of the polyurethane elastomer outer sheath layer does not exceed 8.6 mm.

[0006] Preferably, the outer diameter of the insulated core is 2 mm to 2.4 mm.

[0007] Preferably, the inner conductor is formed by stranding a number of tinned copper single wires with a wire diameter of 0.02 mm to 0.08 mm.

[0008] Preferably, the thickness of the XLPE insulating layer is 0.4 mm to 0.6 mm.

[0009] Preferably, the power cord core conductor is composed of a plurality of tinned copper single wires with a wire diameter of 0.08 mm to 0.2 mm stranded together.

[0010] Preferably, the aluminum-plastic composite tape wrapped total shielding layer is a spiral overlapping wrapping structure of aluminum-plastic composite tape, and the aluminum-plastic composite tape is formed by laminating a PET film and an aluminum foil.

[0011] Preferably, the thickness of the PET film is 15 μm to 150 μm, and the thickness of the aluminum foil is 3 μm to 40 μm.

[0012] Preferably, the PTFE semi-oriented tape outer wrapped anti-friction layer is a multi-layer overlapping wrapping structure of PTFE semi-oriented tape and the winding pitch is one-fourth to one-half of the tape width.

[0013] Preferably, the degree of orientation of the PTFE semi-oriented tape is 1.2 to 1.4 and the thickness is 0.05 to 0.1 mm.

[0014] Preferably, thermoplastic EVA adhesive layers are provided on the outer surface of the polyurethane elastomer inner sheath layer and the inner surface of the polyurethane elastomer outer sheath layer.

[0015] Advantages of the present application:

[0016] 1. Five power cord cores, one control core and a para-aramid copolymerized fiber core material are jointly stranded in the cable core. The internal structure of the cable core is more round and balanced, optimizing the outer diameter size ratio of the power cord core and the control core. The outer diameter of the power cord core does not exceed 80% of the outer diameter of the insulated core. The outer diameter of the insulated core is 2 mm to 2.4 mm. The outer diameter of the power cord core conductor is larger than the inner conductor outer diameter of the insulated core. The insulating layer of the insulated core is not less than 2 times the thickness of the ETFE insulating layer of the power cord core, which helps to slow down the local stress concentration borne by the control core, improve the torsional resistance characteristics of the control core, prevent the occurrence of broken cores and broken wires. The two insulated cores are optimized to be back-twisted and stranded. The insulated core twists itself and the twisting direction is the same as the stranding direction of the cable core. The winding direction of the PTFE semi-oriented tape outer wrapped anti-friction layer is the same as the stranding direction of the cable core. During the cable twisting operation process, it is beneficial to suppress the loosening of the control core, and is beneficial to suppressing the interference between the two insulated cores, ensuring stable electrical characteristics and improving durability.

[0017] 2. An AFRP reinforced wrapping layer is added between the polyurethane elastomer inner and outer sheath layers, which helps to improve the torsional resistance performance of the cable. The AFRP reinforced wrapping layer increases the mechanical strength of the cable sheath, plays an effective protective role for the cable sheath, extends the service life and improves durability. Brief Description of the Drawings

[0018] Figure 1 This is a schematic cross-sectional structure diagram of an embodiment of the present application.

[0019] Explanation of reference numerals:

[0020] 1 - control core wire, 2 - power supply core wire, 3 - para-position type wholly aromatic copolyamide drawn fiber core material, 4 - PTFE semi-oriented tape outer wrapped anti-friction layer, 5 - aluminum-plastic composite tape wrapped total shielding layer, 6 - polyurethane elastomer inner sheath layer, 7 - AFRP reinforced wrapped layer, 8 - insulated core wire, 9 - inner conductor, 10 - XLPE insulation layer, 11 - power supply core wire conductor, 12 - ETFE insulation layer, 13 - polyurethane elastomer outer sheath layer. Detailed implementation manners

[0021] The terms used in the implementation manner part of the present application are only used to explain the specific embodiments of the present application, rather than aiming to limit the present application. The implementation manners of the embodiments of the present application will be described in detail below with reference to the drawings.

[0022] Refer to Figure 1 , the torsion-resistant and anti-twisting and loosening prevention type total shielding control cable of the embodiment of the present application includes a control core wire 1 and five power supply core wires 2 and a para-position type wholly aromatic copolyamide drawn fiber core material 3 which are jointly stranded to form a cable core. The control core wire 1 is formed by untwisting and stranding two insulated core wires 8, and the stranding pitch is 6 mm to 10 mm, and the outer diameter of the insulated core wire 8 is 2 mm to 2.4 mm. The insulated core wire 8 includes an inner conductor 9 and an XLPE insulation layer 10. Specifically, the inner conductor 9 is formed by stranding a plurality of tinned copper single wires with a wire diameter of 0.02 mm to 0.08 mm. The thickness of the XLPE insulation layer 10 is 0.4 mm to 0.6 mm. The power supply core wire 2 includes a power supply core wire conductor 11 and an ETFE insulation layer 12. Specifically, the power supply core wire conductor 11 is formed by stranding a plurality of tinned copper single wires with a wire diameter of 0.08 mm to 0.2 mm. The outer diameter of the power supply core wire 2 does not exceed 80% of the outer diameter of the insulated core wire 8, the outer diameter of the power supply core wire conductor 11 is greater than the outer diameter of the inner conductor 9, and the XLPE insulation layer 10 is not less than 2 times the thickness of the ETFE insulation layer 12.

[0023] Outside the cable core, there are successively coated with a PTFE semi-oriented tape outer wrapping anti-friction layer 4, an aluminum-plastic composite tape wrapping overall shielding layer 5, a polyurethane elastomer inner sheath layer 6, an AFRP strengthening wrapping layer 7, and a polyurethane elastomer outer sheath layer 13. The stranding direction of the insulated conductor 8 is the same as that of the cable core and the winding direction of the PTFE semi-oriented tape outer wrapping anti-friction layer 4. In one embodiment, the PTFE semi-oriented tape outer wrapping anti-friction layer 4 is a multi-layer PTFE semi-oriented tape overlapping wrapping structure with a winding pitch of one-fourth to one-half of the tape width. Further, the degree of orientation of the PTFE semi-oriented tape is 1.2 to 1.4, and the thickness is 0.05 to 0.1 mm. In one embodiment, the aluminum-plastic composite tape wrapping overall shielding layer 5 is an aluminum-plastic composite tape spiral overlapping wrapping structure. The aluminum-plastic composite tape is formed by laminating a PET film and an aluminum foil. Further, the thickness of the PET film is 15 μm to 150 μm, and the thickness of the aluminum foil is 3 μm to 40 μm. Heat-sealable EVA adhesive layers are provided on the outer surface of the polyurethane elastomer inner sheath layer 6 and the inner surface of the polyurethane elastomer outer sheath layer 13. The outer diameter of the polyurethane elastomer outer sheath layer 13 does not exceed 8.6 mm.

[0024] 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 described 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. Anti-twisting and anti-loosening type overall shielded control cable, its characteristics are: The invention comprises a control wire core (1) and five power wire cores (2) twisted together with a para-type fully aromatic copolyamide stretched fiber core material (3) to form a cable core, wherein the cable core is coated with a PTFE semi-oriented tape outer wrapping friction reduction layer (4), an aluminum-plastic composite tape wrapping overall shielding layer (5), a polyurethane elastomer inner sheath layer (6), an AFRP strengthening wrapping layer (7) and a polyurethane elastomer outer sheath layer (13) in sequence, wherein the control wire core (1) is formed by two insulated wire cores (8) being twisted back and forth and having a lay length of 6 mm to 10 mm, wherein the insulated wire core (8) comprises an inner conductor (9) and an XLPE insulation layer ( 10), the insulated wire core (8) has the same twist direction as the cable core and the same winding direction as the PTFE semi-directional tape outer wrapped friction reducing layer (4), the power line core (2) comprises a power line core conductor (11) and an ETFE insulation layer (12), the outer diameter of the power line core (2) does not exceed 80% of the outer diameter of the insulated wire core (8), the outer diameter of the power line core conductor (11) is greater than the outer diameter of the inner conductor (9), the XLPE insulation layer (10) is not less than 2 times the thickness of the ETFE insulation layer (12), and the outer diameter of the polyurethane elastomer outer sheath layer (13) does not exceed 8.6 mm.

2. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 1 is characterized in that: The outer diameter of the insulating wire core (8) is 2 mm to 2.4 mm.

3. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 1 is characterized in that: The inner conductor (9) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.02 mm to 0.08 mm twisted together.

4. The torsion-resistant, twist-resistant and loose-proof overall shielded control cable according to claim 1 is characterized in that: The XLPE insulation layer (10) has a thickness of 0.4 mm to 0.6 mm.

5. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 1 is characterized in that: The power line core conductor (11) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.08 mm to 0.2 mm twisted together.

6. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 1 is characterized in that: The aluminum-plastic composite tape wrapped total shielding layer (5) is an aluminum-plastic composite tape spirally overlapped and wrapped structure, and the aluminum-plastic composite tape is formed by compounding a PET film and an aluminum foil.

7. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 6 is characterized by: The thickness of the PET film is 15 μm to 150 μm, and the thickness of the aluminum foil is 3 μm to 40 μm.

8. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 1 is characterized in that: The PTFE semi-directional tape outer wrapped friction reduction layer (4) is a multi-layer PTFE semi-directional tape overlapping wrapped structure, and the winding distance is one quarter to one half of the tape width.

9. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 8 is characterized in that: The PTFE semi-oriented tape has an orientation degree of 1.2 to 1.4 and a thickness of 0.05 to 0.1 mm.

10. The torsion-resistant, twist-proof and loose-proof overall shielded control cable according to claim 1 is characterized by: The outer surface of the polyurethane elastomer inner sheath layer (6) and the inner surface of the polyurethane elastomer outer sheath layer (13) are both provided with a thermoplastic EVA adhesive layer.

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