Same-layer stranded anti-signal-crosstalk gas-guide tube cable

Abstract

The utility model discloses a same-layer stranded anti-signal crosstalk gas-guide tube cable, which comprises six three-phase power wire cores and six signal wire cores which are stranded on the same layer around the outside of a gas-guide hard tube to form a cable core, each three-phase power wire core comprises three power wires which are stranded to form a power wire core body, and the outside of each power wire core body is coated with a PTFE (Polytetrafluoroethylene) semi-directional belt inner wrapping antifriction layer. The stranding pitches of the six three-phase power wire cores are different, each signal wire core comprises two insulated wires and two PP resin filling core strips which are uniformly distributed in a cross shape and are jointly stranded to form a signal wire core body, and the signal wire core body is externally coated with an aluminum-plastic composite belt wrapping inner shielding layer. The cable core is sequentially coated with a PTFE semi-directional belt outer wrapping antifriction layer, an aluminum-plastic composite belt wrapping outer shielding layer, a polyurethane elastomer inner sheath layer, an AFRP reinforced wrapping layer and a polyurethane elastomer outer sheath layer. The cable has the advantages of excellent bending resistance, inhibition of wire and core breakage, effective prevention of signal crosstalk between the wire cores, and stable electrical characteristics.

Description

Technical Field

[0001] The present application relates to the technical field of cables, and in particular to a same-layer twisted type signal crosstalk-proof air duct cable. Background Art

[0002] Air duct cables are suitable for metallurgical mining, petrochemical, shipbuilding, locomotive manufacturing and other industries. They are widely used in water plants, refineries, chemical plants, glass plants, sewage treatment plants, high-rise water supply systems, reservoirs, rivers, oceans, etc. for the measurement and control of water supply pools, water distribution pools, water treatment pools, water wells, water tanks, water tanks, oil wells, oil tanks, oil pools and static and dynamic liquid levels of various liquids. Air duct cables need to have good oil resistance, wear resistance, acid and alkali resistance, corrosion resistance, waterproof and shielding properties. When the air duct cable is in working condition, it bends back and forth. The outer diameters of the internally twisted power cores and signal cores are different, and the bending resistance is poor. It is easy to break the core and the wire. The power core and the signal core cannot fully suppress the signal crosstalk problem, resulting in unstable electrical characteristics and affecting the electrical characteristics. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present application is to provide a same-layer twisted anti-signal crosstalk air duct cable, which has excellent bending resistance, suppresses wire and core breakage, effectively prevents signal crosstalk between power line cores and signal line cores, and the cable has stable electrical characteristics and better durability.

[0004] This application solves the above technical problems through the following technical solutions.

[0005] The same-layer twisted anti-signal crosstalk air duct cable comprises six three-phase power line cores and six signal line cores twisted in the same layer around the outside of the air duct to form a cable core, the three-phase power line core comprises three power lines twisted to form a power line core body, the power line core body is coated with a PTFE semi-directional tape inner wrapped friction reduction layer, the power line comprises a power line core conductor and a nitrile polyvinyl chloride insulation layer, the six three-phase power line cores have different lay lengths, the signal line core comprises two insulating wires and two PP resin filled core strips evenly distributed in a cross shape and twisted together to form a signal line core body, the signal line core body is coated with an aluminum-plastic composite tape wrapped inner shielding layer, the six signal line cores have different lay lengths, the insulating wire comprises an inner conductor and a foamed PFA insulation layer, and the outside of the cable core is sequentially coated with a PTFE semi-directional tape outer wrapped friction reduction layer, an aluminum-plastic composite tape wrapped outer shielding layer, a polyurethane elastomer inner sheath layer, an AFRP reinforced sheath layer and a polyurethane elastomer outer sheath layer.

[0006] Preferably, the lay lengths of the six signal cores are 6 mm to 14 mm, and the lay directions of the six signal cores are the same.

[0007] Preferably, the power line core conductor is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.04 mm to 0.08 mm.

[0008] Preferably, the inner conductor is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.02 mm to 0.04 mm.

[0009] Preferably, the inner shielding layer wrapped with the aluminum-plastic composite tape and the outer shielding layer wrapped with the aluminum-plastic composite tape are both aluminum-plastic composite tape unidirectional spiral overlapping wrapped structures.

[0010] Preferably, the aluminum-plastic composite tape comprises an outer layer of aluminum foil and an inner layer of PET film.

[0011] Preferably, the inner wrapped anti-friction layer of the PTFE semi-directional tape and the outer wrapped anti-friction layer of the PTFE semi-directional tape are both multi-layer PTFE semi-directional tape overlapping wrapped structures, and the winding distance is one quarter to one half of the tape width.

[0012] Preferably, 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.

[0013] Preferably, the inner wrapped friction reduction layer of the PTFE semi-directional tape is wound in a direction opposite to the lay direction of the power line core, and the outer wrapped friction reduction layer of the PTFE semi-directional tape is wound in a direction opposite to the lay direction of the cable core.

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

[0015] Beneficial effects of this application:

[0016] 1. Six three-phase power cores and six signal cores are arranged outside the air guide tube and twisted in the same layer to ensure the circular cross-section of the cable core and make the cable core structure more balanced and stable. The PTFE semi-directional tape is wrapped with anti-friction layers inside and outside to form an effect similar to that of a rolling bearing. The sliding friction resistance is small and excellent sliding properties are formed. Under high-frequency bending action, the local stress concentration of the three-phase power core and signal core is reduced, and the load stress applied to each core is alleviated, which helps to improve the bending resistance of the cable. The different lay lengths of the three-phase power core and signal core are beneficial to suppress core breakage and improve durability.

[0017] 2. The three power wires of the three-phase power line core are twisted, and the twist pitches are different, which helps prevent signal crosstalk. The signal line core is coated with an aluminum-plastic composite tape wrapped around the inner shielding layer so that adjacent cores are shielded from each other, effectively preventing signal crosstalk. The aluminum-plastic composite tape wrapped around the outer shielding layer effectively suppresses the leakage of internal signals or noise to the outside and suppresses interference from external signals, ensuring that the electrical characteristics of the cable are stable and reliable, and the durability is better.

[0018] 3. Adding an AFRP reinforced wrapping layer between the inner and outer sheath layers of the polyurethane elastomer helps to improve the tensile strength and bending resistance of the cable. The AFRP reinforced wrapping layer increases the mechanical strength of the cable sheath, effectively protects the cable sheath, extends its service life, and improves its durability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Description of reference numerals:

[0021] 1-three-phase power line core, 2-signal line core, 3-air guide tube, 4-power line, 5-PTFE semi-directional tape inner wrapping anti-friction layer, 6-insulated wire, 7-PP resin filled core strip, 8-aluminum-plastic composite tape inner wrapping shielding layer, 9-PTFE semi-directional tape outer wrapping anti-friction layer, 10-aluminum-plastic composite tape outer wrapping shielding layer, 11-polyurethane elastomer inner sheath layer, 12-AFRP reinforced wrapping layer, 13-polyurethane elastomer outer sheath layer, 14-power line core conductor, 15-nitrile polyvinyl chloride insulation layer, 16-inner conductor, 17-foamed PFA 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 same-layer twisted anti-signal crosstalk air duct cable of the embodiment of the present application includes six three-phase power line cores 1 and six signal line cores 2 twisted in the same layer around the outside of the air duct 3 to form a cable core. The three-phase power line core 1 includes three power lines 4 twisted to form a power line core body, and the power line core body is coated with a PTFE semi-directional tape inner wrapping anti-friction layer 5. The power line 4 includes a power line core conductor 14 and a nitrile polyvinyl chloride insulation layer 15. Specifically, the power line core conductor 14 is composed of several tinned copper monofilaments with a wire diameter of 0.04mm to 0.08mm. The six three-phase power line cores 1 have different lay lengths. The signal wire core 2 includes two insulated wires 6 and two PP resin filled core strips 7 which are evenly distributed in a cross shape and twisted together to form a signal wire core body. The signal wire core body is coated with an aluminum-plastic composite tape wrapped inner shielding layer 8. The six signal wire cores 2 have different lay lengths. Furthermore, the lay lengths of the six signal wire cores 2 are 6mm to 14mm, and the six signal wire cores 2 have the same lay direction. The insulated wire 6 includes an inner conductor 16 and a foamed PFA insulation layer 17. Specifically, the inner conductor 16 is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.02mm to 0.04mm twisted together.

[0024] The cable core is coated with a PTFE semi-directional tape outer wrapping anti-friction layer 9, an aluminum-plastic composite tape wrapping outer shielding layer 10, a polyurethane elastomer inner sheath layer 11, an AFRP reinforcing wrapping layer 12 and a polyurethane elastomer outer sheath layer 13 in sequence. The outer surface of the polyurethane elastomer inner sheath layer 11 and the inner surface of the polyurethane elastomer outer sheath layer 13 are both provided with a thermoplastic EVA adhesive layer.

[0025] In one embodiment, the aluminum-plastic composite tape wrapped inner shielding layer 8 and the aluminum-plastic composite tape wrapped outer shielding layer 10 are both aluminum-plastic composite tape unidirectional spiral overlapping wrapped structures. The aluminum-plastic composite tape includes an outer layer of aluminum foil and an inner layer of PET film. In one embodiment, the PTFE semi-directional tape inner wrapped friction reduction layer 5 and the PTFE semi-directional tape outer wrapped friction reduction layer 9 are both multi-layer PTFE semi-directional tape overlapping wrapped structures and the winding distance is one quarter to one half of the bandwidth. Further, the orientation degree of the PTFE semi-directional tape is 1.2 to 1.4 and the thickness is 0.05 to 0.1 mm. Furthermore, the winding direction of the PTFE semi-directional tape inner wrapped friction reduction layer 5 is opposite to the twist direction of the power line core, and the winding direction of the PTFE semi-directional tape outer wrapped friction reduction layer 9 is opposite to the twist direction of the cable core.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Same-layer twisted anti-signal crosstalk airway cable, characterized by: The invention comprises six three-phase power line cores (1) and six signal line cores (2) twisted in the same layer around the outside of an air guide tube (3) to form a cable core, the three-phase power line core (1) comprises three power lines (4) twisted to form a power line core body, the power line core body is coated with a PTFE semi-directional tape inner wrapping anti-friction layer (5), the power line (4) comprises a power line core conductor (14) and a nitrile polyvinyl chloride insulation layer (15), the six three-phase power line cores (1) have different lay lengths, the signal line core (2) comprises two insulating wires (6) and two PP resin filled cores The strips (7) are evenly distributed in a cross shape and twisted together to form a signal line core body. The signal line core body is coated with an inner shielding layer (8) wrapped with an aluminum-plastic composite tape. The six signal line cores (2) have different twisting pitches. The insulating wire (6) includes an inner conductor (16) and a foamed PFA insulating layer (17). The cable core is coated with a PTFE semi-directional tape outer friction reduction layer (9), an aluminum-plastic composite tape outer shielding layer (10), a polyurethane elastomer inner sheath layer (11), an AFRP reinforcement sheath layer (12) and a polyurethane elastomer outer sheath layer (13) in sequence.

2. The same-layer twisted anti-signal crosstalk air duct cable according to claim 1 is characterized in that: The lay lengths of the six signal wire cores (2) are between 6 mm and 14 mm, and the lay directions of the six signal wire cores (2) are the same.

3. The same-layer twisted anti-signal crosstalk air duct cable according to claim 1 is characterized in that: The power line core conductor (14) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.04 mm to 0.08 mm twisted together.

4. The same-layer twisted anti-signal crosstalk air duct cable according to claim 1 is characterized in that: The inner conductor (16) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.02 mm to 0.04 mm twisted together.

5. The same-layer twisted anti-signal crosstalk airway cable according to claim 1 is characterized in that: The aluminum-plastic composite tape wrapped inner shielding layer (8) and the aluminum-plastic composite tape wrapped outer shielding layer (10) are both aluminum-plastic composite tape unidirectional spiral overlapping wrapped structures.

6. The same-layer twisted anti-signal crosstalk airway cable according to claim 5 is characterized in that: The aluminum-plastic composite tape comprises an aluminum foil outer layer and a PET film inner layer.

7. The same-layer twisted anti-signal crosstalk airway cable according to claim 1 is characterized by: The PTFE semi-directional tape inner wrapped anti-friction layer (5) and the PTFE semi-directional tape outer wrapped anti-friction layer (9) are both multi-layer PTFE semi-directional tape overlapping wrapped structures, and the winding distance is one quarter to one half of the tape width.

8. The same-layer twisted anti-signal crosstalk airway cable according to claim 7 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.

9. The same-layer twisted anti-signal crosstalk air duct cable according to claim 7 is characterized in that: The winding direction of the inner wrapped friction reduction layer (5) of the PTFE semi-directional tape is opposite to the twisting direction of the power line core, and the winding direction of the outer wrapped friction reduction layer (9) of the PTFE semi-directional tape is opposite to the twisting direction of the cable core.

10. The same-layer twisted anti-signal crosstalk air duct cable according to claim 1, characterized in that: The outer surface of the polyurethane elastomer inner sheath layer (11) 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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