CN214956056U - Small-diameter anti-interference multi-core insulated cable - Google Patents

Abstract

The utility model discloses an anti-interference multicore insulated cable of thin footpath, including two coaxial control sinle silks and six pair twist control sinle silks around a central power sinle silk and jointly constitute the cable core with the transposition of first resin filler core, it is every adjacent three pair twist control sinle silk interval is provided with one coaxial control sinle silk, the external diameter of central power sinle silk is greater than pair twist control sinle silk external diameter just is less than coaxial control sinle silk external diameter, and the cable core outside cladding has polyester fiber plain weave outward around covering, shielding mesh conductor layer and PVC oversheath in proper order. The cable can effectively prevent noise interference among cable cores on the premise of manufacturing the cable with a small diameter, has better shielding performance, has good bending resistance and better durability.

Description

Small-diameter anti-interference multi-core insulated cable

Technical Field

The application relates to the technical field of cables, in particular to a small-diameter anti-interference multi-core insulated cable.

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. Due to rapid development of transmission technology, maintenance testing technology and the like, communication cables gradually develop to be thin and light, a control wire core and a power wire core are generally stranded in a cable core together by a multi-core cable, and the shielding effect is influenced by low specification standards along with the increase of the number of the wire cores.

SUMMERY OF THE UTILITY MODEL

The utility model provides an it is not enough to prior art, and the technical problem that solve provides an anti-interference multicore insulated cable of thin footpath, under thin footpath preparation prerequisite, can effectually prevent the noise interference between the cable core, shielding performance is more excellent to have good resistant crooked characteristic, durability is better.

The present application solves the above-mentioned problems by the following technical solutions.

The small-diameter anti-interference multi-core insulated cable comprises two coaxial control wire cores and six pair-twisted control wire cores, wherein the two coaxial control wire cores and the six pair-twisted control wire cores surround a central power supply wire core and are jointly twisted with a first resin filling core to form a cable core, every three adjacent pair-twisted control wire cores are provided with one coaxial control wire core at intervals, the outer diameter of the central power supply wire core is larger than the outer diameter of the pair-twisted control wire core and smaller than the outer diameter of the coaxial control wire core, the cable core is sequentially coated with a polyester fiber plain woven fabric outer winding layer, a shielding mesh conductor layer and a PVC outer sheath, the central power supply wire core comprises five power supply wire cores, the five power supply wire cores are twisted around a central PFA resin core rod to form a first wire core body, the outer part of the first wire core body is coated with a fluororesin tape winding and coated with a power supply wire core body, the outer part of the power supply wire core body is coated with a silane grafted cross-linked low-density polyethylene insulating layer, the first insulated wire core includes a center conductor and a foamed polyethylene insulating layer.

Preferably, the coaxial control wire core comprises a first inner conductor, and a first foaming PFA insulating layer, a copper wire braided shielding layer and an ETFE resin wrapping layer which are sequentially wrapped outside the first inner conductor.

Preferably, the first inner conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.05 mm.

Preferably, the copper wire braided shielding layer is formed by spirally winding and braiding tin-plated copper foil wires and tin-plated copper monofilaments in opposite directions, and the spiral angles of the tin-plated copper foil wires and the tin-plated copper monofilaments are different.

Preferably, the pair-twisted control wire core comprises three pair-twisted wire cores and a second resin filling core material, the three pair-twisted wire cores and the second resin filling core material are twisted together to form a second wire core body, the outside of the second wire core body is sequentially wrapped with a polyester fiber plain weave inner wrapping layer, a metal shielding layer and a first PFA insulating layer, the pair-twisted wire core comprises two second insulating wire cores, the two second insulating wire cores are twisted in pair to form a pair-twisted wire core body, the outside of the pair-twisted wire core body is wrapped with a second PFA insulating layer, and the second insulating wire core comprises a second inner conductor and a second foamed PFA insulating layer.

Preferably, the metal shielding layer is formed by two layers of tinned copper wires which are in reverse spiral winding weaving structures and have different spiral angles, and the spiral angles are 45-60 degrees.

Preferably, the second inner conductor is formed by bundling a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.04 mm.

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

Preferably, the shielding mesh conductor layer is formed by mixing and spirally winding two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9-1, and the wire diameter of each tinned copper wire is 0.02-0.08 mm.

The beneficial effect of this application:

1. the central power line core is arranged at the center of the cable core to replace a center filling core material to reduce the outer diameter of the cable, the diameter reduction manufacturing is facilitated, the outer diameter of the central power line core is larger than the outer diameter of the pair-twisted control line core and smaller than the outer diameter of the coaxial control line core, the lateral pressure of the coaxial control line core when the cable is bent is borne by the central power line core, the lateral pressure borne by the pair-twisted control line core is favorably reduced, effective protection is formed, the central power line core is provided with a central PFA resin core rod and a fluororesin belt wrapping anti-friction layer, the lateral pressure can be better borne when the cable is bent, the circular section of the cable is favorably kept, the tensile strength of the cable is improved, the phenomena that the central conductor and the shielding layer are broken and broken are reduced, the flexibility and the bending resistance are improved, and the durability is better.

2. Coaxial control sinle silk, pair twist control sinle silk are provided with the shielding layer separately, and the noise interference between the effectual prevention sinle silk, and the cable core outside adds the netted conductor layer of shielding, can effectually restrain inside signal or noise leakage to the outside and restrain the interference that comes from external signal, provide better shielding effect.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Description of reference numerals:

1-coaxial control wire core, 11-first inner conductor, 12-first foamed PFA insulating layer, 13-copper wire braided shielding layer, 14-ETFE resin wrapping layer, 2-pair twisted control wire core, 21-pair twisted wire core, 22-second resin filled core material, 23-polyester fiber plain weave inner wrapping layer, 24-metal shielding layer, 25-first PFA insulating layer, 26-second PFA insulating layer, 27-second insulating wire core, 28-second inner conductor, 29-second foamed PFA insulating layer, 3-central power wire core, 31-power wire core, 32-central PFA resin core rod, 33-fluororesin tape wrapping antifriction layer, 34-first insulating wire core, 35-silane grafted cross-linked low-density polyethylene insulating layer, 36-central conductor, 37-foamed polyethylene insulating layer, 4-first resin filling core material, 5-polyester fiber plain weave outer winding cladding, 6-shielding mesh conductor layer and 7-PVC outer sheath.

Detailed Description

The terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the application, as the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the small-diameter anti-interference multi-core insulated cable according to the embodiment of the present application includes two coaxial control cores 1 and six twisted-pair control cores 2, wherein the two coaxial control cores 1 and the six twisted-pair control cores 2 surround a central power supply core 3 and are twisted with a first resin-filled core 4 to form a cable core, one coaxial control core 1 is disposed at an interval between every two adjacent twisted-pair control cores 2, and an outer diameter of the central power supply core 3 is greater than an outer diameter of the twisted-pair control core 2 and is smaller than an outer diameter of the coaxial control core 1.

The cable core is characterized in that the outside of the cable core is sequentially coated with a polyester fiber plain weave outer winding cladding layer 5, a shielding mesh conductor layer 6 and a PVC outer sheath 7, specifically, the shielding mesh conductor layer 6 is formed by mixing and spirally winding two tinned copper wires with different wire diameters and the wire diameter ratio of 0.9-1, and the wire diameter of each tinned copper wire is 0.02-0.08 mm.

The central power core 3 comprises five power cores 31 twisted together around a central PFA resin core rod 32 to form a first core body, the first core body is externally coated with a fluororesin tape wrapped antifriction layer 33, the power cores 31 comprise two first insulation cores 34 twisted in pairs to form a power core body, the power core body is externally coated with a silane grafted cross-linked low-density polyethylene insulation layer 35, and the first insulation cores 34 comprise a central conductor 36 and a foamed polyethylene insulation layer 37. Specifically, the central conductor 36 is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.05mm to 0.08 mm.

In one embodiment, the coaxial control line core 1 includes a first inner conductor 11, and a first foamed PFA insulating layer 12, a copper braided shielding layer 13 and an ETFE resin wrapping layer 14 sequentially coated outside the first inner conductor 11. Specifically, the first inner conductor 11 is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.05 mm. The copper wire braided shielding layer 13 is formed by braiding tin-plated copper foil wires and tin-plated copper monofilaments in a reverse spiral winding mode, and the spiral angles of the tin-plated copper foil wires and the tin-plated copper monofilaments are different.

In one embodiment, the twisted-pair control wire core 2 comprises three twisted-pair wire cores 21 and a second resin filled core 22, which are twisted together to form a second wire core body, the second wire core body is sequentially coated with a polyester fiber plain cloth inner wrapping layer 23, a metal shielding layer 24 and a first PFA insulating layer 25, the twisted-pair wire core 21 comprises two second insulating wire cores 27, which are twisted in pairs to form a twisted-pair wire core body, the twisted-pair wire core body is coated with a second PFA insulating layer 26, and the second insulating wire cores 27 comprise a second inner conductor 28 and a second PFA foamed insulating layer 29. Specifically, the second inner conductor 28 is formed by bundling a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.04 mm. The metal shielding layer 24 is formed by two layers of tinned copper wires which are in reverse spiral winding weaving structures and have different spiral angles, and the spiral angles are 45-60 degrees.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application.

Claims (9)

1. The small-diameter anti-interference multi-core insulated cable is characterized in that: the cable comprises two coaxial control cable cores (1) and six pair-twisting control cable cores (2), wherein the two coaxial control cable cores (1) and the six pair-twisting control cable cores (2) surround a central power supply cable core (3) and are jointly twisted with a first resin filling core material (4) to form a cable core, every three adjacent pair-twisting control cable cores (2) are provided with one coaxial control cable core (1) at intervals, the outer diameter of each central power supply cable core (3) is larger than the outer diameter of each pair-twisting control cable core (2) and smaller than the outer diameter of each coaxial control cable core (1), the outer part of the cable core is sequentially coated with a polyester fiber plain weave outer winding cladding layer (5), a shielding mesh conductor layer (6) and a PVC outer sheath (7), each central power supply cable core (3) comprises five power supply cable cores (31), the five power supply cable cores (31) are jointly twisted around a central PFA resin core rod (32) to form a first cable core body, the outer part of the first cable core body is coated with a fluorine resin tape winding antifriction layer (33), the power cord core (31) comprises two first insulating cord cores (34) which are twisted in pairs to form a power cord core body, the outside of the power cord core body is coated with a silane grafted cross-linked low-density polyethylene insulating layer (35), and each first insulating cord core (34) comprises a central conductor (36) and a foamed polyethylene insulating layer (37).

2. The small-diameter anti-interference multi-core insulated cable according to claim 1, wherein: coaxial control sinle silk (1) include first inner conductor (11) and cladding in proper order first foaming PFA insulating layer (12), copper wire weave shielding layer (13) and ETFE resin around covering (14) outside first inner conductor (11).

3. The small-diameter anti-interference multi-core insulated cable according to claim 2, wherein: the first inner conductor (11) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.05 mm.

4. The small-diameter anti-interference multi-core insulated cable according to claim 2, wherein: the copper wire braided shielding layer (13) is formed by spirally winding and braiding tin-plated copper foil wires and tin-plated copper monofilaments in opposite directions, and the spiral angles of the tin-plated copper foil wires and the tin-plated copper monofilaments are different.

5. The small-diameter anti-interference multi-core insulated cable according to claim 1, wherein: pair twist control sinle silk (2) include three pair twist sinle silk (21) and second resin fill core (22) and strand jointly and constitute second line core body, second line core body outside cladding has around covering (23), metallic shield layer (24) and first PFA insulating layer (25) in the polyester fiber plain weave cloth in proper order, pair twist sinle silk (21) include that two second insulation sinle silks (27) pair twist constitute the pair twist pair core body, the outside cladding of pair twist pair core body has second PFA insulating layer (26), second insulation sinle silk (27) include second inner conductor (28) and second PFA foaming insulating layer (29).

6. The small-diameter anti-interference multi-core insulated cable according to claim 5, wherein: the metal shielding layer (24) is formed by two layers of tinned copper wires which are in reverse spiral winding weaving structures and different in spiral angle, and the spiral angle is 45-60 degrees.

7. The small-diameter anti-interference multi-core insulated cable according to claim 5, wherein: the second inner conductor (28) is formed by bundling a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.04 mm.

8. The small-diameter anti-interference multi-core insulated cable according to claim 1, wherein: the central conductor (36) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.05mm to 0.08 mm.

9. The small-diameter anti-interference multi-core insulated cable according to claim 1, wherein: the shielding mesh conductor layer (6) is formed by spirally winding two tinned copper wire mixed single directions with different wire diameters and the wire diameter ratio of 0.9-1, and the wire diameter of the tinned copper wire is 0.02-0.08 mm.

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