Flexible anti-breakage single-pair shielding armored instrument cable

Abstract

The utility model discloses a flexible anti-breaking single-pair shielding armored instrument cable, two single-pair shielding twisted-pair wire cores are twisted to form a cable core, each single-pair shielding twisted-pair wire core comprises two insulating wire cores which are back-twisted and twisted to form a wire core body, the wire core body is sequentially wrapped by a PET wrapping layer and an aluminum-plastic composite belt wrapping sub-shielding layer, and the outer side of the aluminum-plastic composite belt wrapping sub-shielding layer is wrapped by an aluminum-plastic composite belt wrapping sub-shielding layer. An aluminum-plastic composite belt wrapping total shielding layer, a metal wire mixed weaving total shielding layer, an irradiation crosslinking linear low density polyethylene inner sheath layer, a galvanized steel wire armor layer and an irradiation crosslinking linear low density polyethylene outer sheath layer are sequentially wrapped outside the cable core, and the wrapping direction of the aluminum-plastic composite belt wrapping total shielding layer is the same as the twisting direction of the cable core. And the outer diameter of the irradiation crosslinking linear low density polyethylene outer sheath layer is 14mm to 21mm. The instrument cable twisted-pair wire core conductor has better flexibility and bending resistance, ensures stable electrical characteristics, ensures stable shielding effect, enhances safety and reliability, and has better durability, and the twisted-pair wire cores are not easy to loosen.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a flexible, anti-breakage single-pair shielded armored instrument cable. Background Art

[0002] In intelligent industrial production lines, symmetrical communication cables are used in signal transmission and control systems in monitoring equipment, electronic computers, and information processing equipment. Steel wire armor is added and usually used in working conditions with increased risk of mechanical damage. The electromagnetic noise environment at industrial application sites is often very complex, and the radiation or conduction of electromagnetic noise (EMI) may seriously interfere with the normal operation of the equipment. To combat electromagnetic noise interference on electrical lines, a very important way is to use symmetrical communication cables with shielding. However, the twisted core generally adopts a double-core twisting method without back-twisting and the external reverse wrapping tape or shielding layer. After repeated bending and twisting during the operation of the cable, the double core of the twisted core is easy to loosen, which is not conducive to reducing the interference between the wire pairs themselves, greatly weakening the anti-interference ability, and the conductor is prone to broken wires and even cable short circuits and disconnections, affecting the normal production order and poor durability. Utility Model Content

[0003] The present application aims to solve the technical problem of providing a soft, anti-breakage single-pair shielded armored instrument cable in which the twisted core conductor has better flexibility and bending resistance, ensuring stable electrical characteristics, the twisted core is not prone to loosening, ensuring a stable shielding effect, enhancing safety and reliability, and having better durability.

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

[0005] Flexible anti-break single-pair shielded armored instrument cable, two single-pair shielded twisted wire cores are twisted to form a cable core, the single-pair shielded twisted wire core includes two insulated wire cores that are twisted back to form a wire core body, the insulated wire core includes a thin copper stranded wire inner conductor layer, a plurality of thick copper stranded wires are twisted around the outside of the thin copper stranded wire inner conductor layer to form a thick copper stranded wire outer conductor layer, the thin copper stranded wire inner conductor layer is composed of a plurality of tinned copper single wires with a wire diameter of 0.1mm to 0.2mm concentrically twisted, and the thick copper stranded wire is composed of a plurality of tinned copper single wires with a wire diameter of 0.2mm to 0.5mm concentrically twisted The outer conductor layer of the thick copper stranded wire is coated with an XLPE insulation layer, the outer core body is coated with a PET wrapping layer and an aluminum-plastic composite tape wrapping sub-shielding layer in sequence, the outer core of the cable is coated with an aluminum-plastic composite tape wrapping total shielding layer, a metal wire mixed total shielding layer, an irradiated cross-linked linear low-density polyethylene inner sheath layer, a galvanized steel wire armor layer and an irradiated cross-linked linear low-density polyethylene outer sheath layer in sequence, the winding direction of the aluminum-plastic composite tape wrapping total shielding layer is the same as the cable core twisting direction, and the outer diameter of the irradiated cross-linked linear low-density polyethylene outer sheath layer is 14mm to 21mm.

[0006] Preferably, the winding direction of the PET wrapping layer is the same as the lay direction of the wire core, and the lay direction of the wire core is the same as the lay direction of the cable core.

[0007] Preferably, the aluminum-plastic composite tape wrapped total shielding layer is an aluminum-plastic composite tape spirally overlapped wrapped structure, the aluminum-plastic composite tape comprises a PET film, and aluminum foil layers are provided on both sides of the PET film.

[0008] Preferably, the aluminum-plastic composite tape wrapped shielding layer is an aluminum-plastic composite tape spirally overlapped wrapped structure, the aluminum-plastic composite tape comprises a PET film, an aluminum foil layer is provided on the outer surface of the PET film, and an adhesive layer is provided on the inner surface of the PET film.

[0009] Preferably, the metal wire mixed shielding layer is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are woven in counter-rotating spirals, and the wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire.

[0010] Preferably, the lay lengths of the two single pairs of shielded twisted wire cores are different.

[0011] Preferably, the inner conductor layer of the thin copper stranded wire and the outer conductor layer of the thick copper stranded wire have the same twisting direction, and the lay length of the outer conductor layer of the thick copper stranded wire is greater than the lay length of the inner conductor layer of the thin copper stranded wire.

[0012] Preferably, the thickness of the radiation cross-linked linear low-density polyethylene inner sheath layer is 0.9 mm to 1.2 mm, and the thickness of the radiation cross-linked linear low-density polyethylene outer sheath layer is 1.4 mm to 1.6 mm.

[0013] Preferably, the total cross-sectional area of ​​the inner conductor layer of the thin copper stranded wire and the outer conductor layer of the thick copper stranded wire is 0.5 mm 2 , 0.75mm 2 , 1mm 2 or 1.5mm 2 The thickness of the XLPE insulation layer is 0.5 mm to 0.6 mm.

[0014] Beneficial effects of this application:

[0015] 1. The conductor is composed of a thin copper stranded wire inner conductor layer and a thick copper stranded wire outer conductor layer, and the conductor cross-sectional area is 0.5mm 2 , 0.75mm 2 , 1mm 2 or 1.5mm 2 The inner conductor layer is composed of tinned copper monofilaments with a wire diameter of 0.1mm to 0.2mm concentrically twisted, and the thick copper stranded wire is twisted around the outside of the inner conductor layer to form an outer conductor layer, and the thick copper stranded wire is composed of several tinned copper monofilaments with a wire diameter of 0.2mm to 0.5mm concentrically twisted. The diameter of the tinned copper monofilaments in the inner conductor layer is smaller than the diameter of the tinned copper monofilaments used in the thick copper stranded wires in the outer conductor layer. The inner conductor layer has better flexibility, and the outer conductor layer has better rigidity and bending resistance. The outer conductor layer is a structure formed by multiple twisting of thick copper stranded wires, which has higher structural strength, helps to improve flexibility and bending resistance, inhibit wire breakage, ensure stable electrical characteristics, enhance safety and reliability, and has better durability.

[0016] 2. The two insulated cores of the two single-pair shielded twisted cores inside the cable core are twisted by back-twisting. The insulated core itself is twisted and the twisting direction is opposite to the twisting direction of the core body. The twisting direction of the core body is the same as the cable core. The PET sheath is added. The conductivity of PET is higher. The winding direction of the PET sheath is the same as the twisting direction of the core body of the twisted core and the cable core. During the bending action of the cable, it is beneficial to suppress the loosening of the twisted core, which is beneficial to reduce the interference between the two insulated cores of the twisted core, enhance the ability to resist external electromagnetic interference, ensure stable shielding characteristics, and improve durability.

[0017] 3. By adding a galvanized steel wire armor layer between the inner and outer sheaths, additional mechanical protection is provided, which has a certain resistance to mechanical damage, improves the mechanical strength of the cable, protects the sheath layer, and improves durability and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Description of reference numerals:

[0020] 1-single pair of shielded twisted core, 2-insulated core, 3-thin copper stranded wire inner conductor layer, 4-thick copper stranded wire outer conductor layer, 5-XLPE insulation layer, 6-PET wrapping layer, 7-aluminum-plastic composite tape wrapping sub-shielding layer, 8-aluminum-plastic composite tape wrapping overall shielding layer, 9-metal wire mixed braided overall shielding layer, 10-irradiation cross-linked linear low-density polyethylene inner sheath layer, 11-galvanized steel wire armor layer, 12-irradiation cross-linked linear low-density polyethylene outer sheath layer. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1 , the flexible anti-break single-pair shielded armored instrument cable of the embodiment of the present application, two single-pair shielded twisted cores 1 are twisted to form a cable core, and the two single-pair shielded twisted cores 1 have different lay lengths. The single-pair shielded twisted core 1 includes two insulated cores 2 that are twisted back to form a core body, the insulated core 2 includes a thin copper stranded inner conductor layer 3, and a plurality of thick copper strands are twisted around the thin copper stranded inner conductor layer 3 to form a thick copper stranded outer conductor layer 4, the thin copper stranded inner conductor layer 3 is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.1mm to 0.2mm, and the thick copper stranded wire is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.2mm to 0.5mm, and further, the thin copper stranded inner conductor layer 3 and the thick copper stranded outer conductor layer 4 are twisted in the same direction, and the lay length of the thick copper stranded outer conductor layer 4 is greater than the lay length of the thin copper stranded inner conductor layer 3. The outer conductor layer 4 of the thick copper stranded wire is coated with an XLPE insulation layer 5. Specifically, the total cross-sectional area of ​​the inner conductor layer 3 of the thin copper stranded wire and the outer conductor layer 4 of the thick copper stranded wire is 0.5 mm 2 , 0.75mm 2 , 1mm 2 or 1.5mm 2 , the thickness of the XLPE insulation layer 5 is 0.5mm to 0.6mm. The outer part of the core body is sequentially coated with a PET wrapping layer 6 and an aluminum-plastic composite tape wrapping sub-shielding layer 7. Further, the winding direction of the PET wrapping layer 6 is the same as the twisting direction of the core body, and the twisting direction of the core body is the same as the twisting direction of the cable core. In one embodiment, the aluminum-plastic composite tape wrapping sub-shielding layer 7 is an aluminum-plastic composite tape spirally overlapped wrapping structure, and the aluminum-plastic composite tape includes a PET film, an aluminum foil layer is provided on the outer surface of the PET film, and an adhesive layer is provided on the inner surface of the PET film.

[0023] The cable core is coated with an aluminum-plastic composite tape wrapped total shielding layer 8, a metal wire mixed braided total shielding layer 9, an irradiated cross-linked linear low-density polyethylene inner sheath layer 10, a galvanized steel wire armor layer 11 and an irradiated cross-linked linear low-density polyethylene outer sheath layer 12 in sequence. The winding direction of the aluminum-plastic composite tape wrapped total shielding layer 8 is the same as the twisting direction of the cable core. In one embodiment, the aluminum-plastic composite tape wrapped total shielding layer 8 is an aluminum-plastic composite tape spirally overlapped wrapped structure, and the aluminum-plastic composite tape includes a PET film, and an aluminum foil layer is provided on both sides of the PET film. In one embodiment, the metal wire mixed braided total shielding layer 9 is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are mutually reversely spirally wound and woven, and the wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire. The thickness of the irradiated cross-linked linear low-density polyethylene inner sheath layer 10 is 0.9mm to 1.2mm, and the thickness of the irradiated cross-linked linear low-density polyethylene outer sheath layer 12 is 1.4mm to 1.6mm. The outer diameter of the radiation cross-linked linear low-density polyethylene outer sheath layer 12 is 14 mm to 21 mm.

[0024] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application.

Claims

1. Flexible anti-break single-pair shielded armored instrument cable, its characteristics are: Two single-pair shielded twisted wire cores (1) are twisted together to form a cable core. The single-pair shielded twisted wire core (1) comprises two insulated wire cores (2) which are twisted back and forth to form a wire core body. The insulated wire core (2) comprises a thin copper stranded wire inner conductor layer (3). A plurality of thick copper stranded wires are twisted around the thin copper stranded wire inner conductor layer (3) to form a thick copper stranded wire outer conductor layer (4). The thin copper stranded wire inner conductor layer (3) is composed of a plurality of tinned copper single wires with a wire diameter of 0.1 mm to 0.2 mm, which are twisted together concentrically. The thick copper stranded wire is composed of a plurality of tinned copper single wires with a wire diameter of 0.2 mm to 0.5 mm, which are twisted together concentrically. The outer conductor layer (4) of the thick copper stranded wire is twisted together concentrically. The outer part of the cable is coated with an XLPE insulation layer (5), the outer part of the wire core is coated with a PET wrapping layer (6), an aluminum-plastic composite tape wrapping sub-shielding layer (7) in sequence, the outer part of the cable core is coated with an aluminum-plastic composite tape wrapping overall shielding layer (8), a metal wire mixed braided overall shielding layer (9), an irradiated cross-linked linear low-density polyethylene inner sheath layer (10), a galvanized steel wire armor layer (11) and an irradiated cross-linked linear low-density polyethylene outer sheath layer (12) in sequence, the winding direction of the aluminum-plastic composite tape wrapping overall shielding layer (8) is the same as the twisting direction of the cable core, and the outer diameter of the irradiated cross-linked linear low-density polyethylene outer sheath layer (12) is 14 mm to 21 mm.

2. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The winding direction of the PET wrapping layer (6) is the same as the twisting direction of the wire core, and the twisting direction of the wire core is the same as the twisting direction of the cable core.

3. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The aluminum-plastic composite tape wrapped total shielding layer (8) is an aluminum-plastic composite tape spirally overlapped wrapped structure, the aluminum-plastic composite tape comprises a PET film, and both sides of the PET film are provided with an aluminum foil layer.

4. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The aluminum-plastic composite tape wrapped shielding layer (7) is an aluminum-plastic composite tape spirally overlapped wrapped structure, the aluminum-plastic composite tape comprises a PET film, an aluminum foil layer is provided on the outer surface of the PET film, and an adhesive layer is provided on the inner surface of the PET film.

5. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The metal wire mixed braided total shielding layer (9) is formed by an inner layer of aluminum-magnesium wires and an outer layer of tinned copper wires being mutually spirally wound and braided in opposite directions, and the wire diameter of the tinned copper wires is larger than the wire diameter of the aluminum-magnesium wires.

6. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The two single-pair shielded twisted wire cores (1) have different lay lengths.

7. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The inner conductor layer (3) of the thin copper stranded wire and the outer conductor layer (4) of the thick copper stranded wire have the same twisting direction, and the twist length of the outer conductor layer (4) of the thick copper stranded wire is greater than the twist length of the inner conductor layer (3) of the thin copper stranded wire.

8. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The thickness of the radiation cross-linked linear low-density polyethylene inner sheath layer (10) is 0.9 mm to 1.2 mm, and the thickness of the radiation cross-linked linear low-density polyethylene outer sheath layer (12) is 1.4 mm to 1.6 mm.

9. The flexible anti-disconnection single-pair shielded armored instrument cable according to claim 1 is characterized by: The total cross-sectional area of ​​the thin copper stranded wire inner conductor layer (3) and the thick copper stranded wire outer conductor layer (4) is 0.5 mm 2 , 0.75mm 2 , 1mm 2 or 1.5mm 2 The XLPE insulation layer (5) has a thickness of 0.5 mm to 0.6 mm.

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