CN112837852A

CN112837852A - Bending-resistant and extrusion-resistant multi-core communication cable

Info

Publication number: CN112837852A
Application number: CN202110224830.2A
Authority: CN
Inventors: 高旭皓; 杨兆文; 江平; 黄建卫; 王成旺; 王登峰; 邵千俊
Original assignee: Zhejiang Products Zhongda Cable Co ltd
Current assignee: Zhejiang Products Zhongda Cable Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-05-25

Abstract

The invention discloses a bending-resistant and extrusion-resistant multi-core communication cable which comprises two power supply wire cores, a communication wire core and a control wire core which are jointly twisted with a PFA resin filled core material to form a cable core, wherein the outside of the cable core is sequentially coated with a polyester fiber plain weave wrapping layer, a shielding mesh conductor layer and a polyvinyl chloride outer sheath, the communication wire core comprises two insulating twisted-pair wire cores and two para-type wholly aromatic copolyamide tensile fiber core strips which are jointly twisted to form a communication wire core body, the insulating twisted-pair wire cores comprise two twisted-pair wire cores and a drain wire which are jointly twisted to form a twisted-pair wire core body, the outside of the twisted-pair wire core body is coated with a foamed polypropylene insulating layer, the twisted-pair wire cores comprise a first inner conductor and an FEP insulating layer, and the outside of the communication. The cable can effectively bear lateral pressure in a bending and extruding state, improves the structural stability of a cable core, reduces the occurrence of core breaking and wire breaking, and reduces signal attenuation.

Description

Bending-resistant and extrusion-resistant multi-core communication cable

Technical Field

The application belongs to the technical field of cables, and particularly relates to an anti-bending and extrusion-resistant multi-core communication cable.

Background

The communication cable is used for forming a channel for transmitting information, can be distinguished according to laying, operating conditions, transmission frequency spectrum, a cable core structure, an insulating material and the like, and needs to have good impedance characteristics, electrical insulation and chemical stability. In an automatic industrial production line, a multi-core communication cable is generally used for a robot, a mobile driving system and the like, however, all control wire cores, a power supply wire core, a communication wire core and the like are twisted together in a cable core, the cable core is loose in structure and can deform when being extruded and bent, and after repeated bending, a shielding layer is easy to break, so that the shielding effect is unstable, the signal transmission characteristic is poor, and the multi-core communication cable is not durable.

Disclosure of Invention

This application is not enough to prior art, and the technical problem that solve provides an anti-bending extrusion-resistant type multicore communication cable, can effectually bear the lateral pressure under the crooked extrusion state, improves cable core structural stability, keeps the normal circular cross-section of cable, reduces disconnected core disconnection and takes place, reduces signal attenuation, and anti noise interference ability is strong, and shielding performance is stable.

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

The bending-resistant and extrusion-resistant multi-core communication cable comprises two power supply wire cores, a communication wire core and a control wire core which are jointly twisted with a PFA resin filling core material to form a cable core, wherein the outer diameter ratio of the communication wire core to the control wire core is 0.95: 1-1.05: 1, the outer diameter of the communication wire core is not more than 70% of the outer diameter of the power supply wire core, a polyester fiber plain weave wrapping layer, a shielding mesh conductor layer and a polyvinyl chloride outer sheath are sequentially coated outside the cable core, the communication wire core comprises two insulating pair-twisted wire cores and two opposite type wholly aromatic copolyamide drawing fiber cores which are jointly twisted to form a communication wire core body, the insulating pair-twisted wire core comprises two pair-twisted wire cores and a drain wire which is jointly twisted to form a pair-twisted wire body, and the drain wire is positioned in a gap between the two pair-twisted wire cores, two the central point line of drain wire with communication core diameter coincidence, the outside cladding of twisted pair core has the foaming polypropylene insulating layer, the twisted pair core includes first inner conductor and FEP insulating layer, the outside cladding in proper order of communication core has the copper to mould compound area around covering and first polyurethane oversheath.

Preferably, the ratio of the outer diameters of the insulated twisted-pair wire core and the para-type wholly aromatic copolyamide drawn fiber core is 1.15:1 to 1.3: 1.

Preferably, the copper-plastic composite tape wrapping layer is of a copper-plastic composite tape multilayer spiral lapping and covering wrapping structure, and the copper-plastic composite tape comprises a copper foil tape inner layer and a PET film outer layer.

As preferred, the control sinle silk includes that six coaxial insulation sinle silks twine around a counterpoint type aromatic copolyamide tensile fiber rope and form the control line core, the outside cladding PET resin area in proper order of control line core is around covering, copper line shielding winding layer and second polyurethane oversheath, coaxial insulation sinle silk includes the second inner conductor, the outside cladding in proper order of second inner conductor has foamed fluororesin to wind covering inner insulating layer and fluororesin outer insulating layer.

Preferably, the PET resin area is for the one-way spiral of PET resin area to take the lid to lap around the covering and is lapped the structure, the PET resin area includes the PET resin basic unit in the outside and the thermoplastic polyurethane adhesive linkage of inboard.

Preferably, the copper wire shielding winding layer is formed by spirally winding an inner layer of tinned copper wire and an outer layer of tinned copper wire in the same direction, the winding distance and the spiral angle degree of the inner layer of tinned copper wire and the outer layer of tinned copper wire are the same, the wire diameter of the inner layer of tinned copper wire is smaller than the wire diameter of the outer layer of tinned copper wire, the wire diameter of the inner layer of tinned copper wire is 0.05mm to 0.12mm, and the wire diameter of the outer layer of tinned copper wire is 0.08mm to 0..

Preferably, the power line core comprises a plurality of insulated wire cores which are jointly stranded around a para-type wholly aromatic copolyamide drawn fiber core to form a power line core body, a PTFE (polytetrafluoroethylene) wrapping tape layer and a silane grafted and crosslinked high-density polyethylene sheath are sequentially coated outside the power line core body, and the power line core comprises a third inner conductor and a silane grafted and crosslinked low-density polyethylene insulating layer.

Preferably, the third inner conductor is formed by twisting several tinned copper monofilaments having a diameter of 0.1 to 0.35mm and several para-type wholly aromatic copolyamide drawn fibers.

Preferably, the power cord core has a lay length 10 to 20 times an outer diameter of the power cord core.

Preferably, the outer diameter of the core material of the para-type wholly aromatic copolyamide drawn fiber is 0.9 to 1.8 times the outer diameter of the insulated wire core.

The beneficial effect of this application:

1. the outer diameter ratio of each wire core is reasonably optimized, the outer diameter ratio of the communication wire core to the control wire core is 0.95: 1-1.05: 1, the outer diameter of the communication wire core is not more than 70% of the outer diameter of the power wire core, the power wire core bears the lateral pressure generated when the cable is bent, the lateral pressure on the communication wire core and the control wire core with smaller outer diameters is favorably relieved, the polyurethane outer sheath is better in wear resistance and not easy to damage, and therefore effective protection is formed.

2. Add the drain wire in the insulating pair twist sinle silk, be favorable to reducing signal attenuation, strengthen the anti-noise interference ability, and, through special structural design, make the drain wire be located clearance department between two pair twist sinle silks and be close to the setting of communication sinle silk central line, the central point line and the coincidence of communication sinle silk diameter of two drain wires, and like this, bear under states such as crooked extrusion when the communication sinle silk, the drain wire is apart from the outside distance lengthening, thereby make the drain wire receive external acting force to take place the deflection and diminish, help improving bending resistance, avoid the drain wire broken string, effectively restrain signal attenuation.

3. Two para-type wholly aromatic copolyamide tensile fiber cores are added in the communication wire core body, the outer diameter ratio of the insulating para-twisted wire core to the para-type wholly aromatic copolyamide tensile fiber cores is optimally designed to be 1.15:1 to 1.3:1, so that the communication wire core body can better bear lateral pressure in the states of bending extrusion and the like, extrusion deformation is prevented, the circular section of the communication wire core body in the normal state is always kept, the tensile elastic modulus of the para-type wholly aromatic copolyamide tensile fiber cores is large, the tensile property of the wire cores is improved, the bending resistance is enhanced, the occurrence of broken cores and broken wires is prevented, good electrical performance is guaranteed, and the communication wire core is durable in use.

4. The communication sinle silk and the control sinle silk independently are provided with the shielding layer, and the noise interference between each sinle silk of effectual prevention, and the cable core outside adds the netted conductor layer of shielding, can effectually restrain inside signal or noise and leak to the outside and restrain the interference that comes from external signal, provide better shielding effect.

Drawings

FIG. 1 is a schematic cross-sectional structural view of an embodiment of the present application;

fig. 2 is a schematic cross-sectional structure diagram of a communication wire core according to an embodiment of the present application.

Description of reference numerals:

1-power supply wire core, 11-insulating wire core, 12-para type wholly aromatic copolyamide drawn fiber core, 13-PTFE winding band layer, 14-silane graft crosslinked high-density polyethylene sheath, 15-third inner conductor, 16-silane graft crosslinked low-density polyethylene insulating layer, 2-communication wire core, 21-insulating twisted pair wire core, 22-para type wholly aromatic copolyamide drawn fiber core strip, 23-twisted pair wire core, 24-foamed polypropylene insulating layer, 25-first inner conductor, 26-FEP insulating layer, 27-copper plastic composite tape winding layer, 28-first polyurethane outer sheath, 29-drain wire, 3-control wire core, 31-coaxial insulating wire core, 32-para type wholly aromatic copolyamide drawn fiber rope, 33-a PET resin tape wrapping layer, 34-a copper wire shielding winding layer, 35-a second polyurethane outer sheath, 36-a second inner conductor, 37-a foamed fluororesin wrapping inner insulating layer, 38-a fluororesin outer insulating layer, a 4-PFA resin filling core material, 5-a polyester fiber plain cloth wrapping layer, 6-a shielding mesh conductor layer and 7-a polyvinyl chloride outer sheath.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, the bending-resistant and extrusion-resistant multi-core communication cable according to the embodiment of the application includes two power line cores 1, one communication line core 2 and one control line core 3, which are twisted together with a PFA resin-filled core material 4 to form a cable core, wherein the outer diameter ratio of the communication line core 2 to the control line core 3 is 0.95:1 to 1.05:1, the outer diameter of the communication line core 2 is not more than 70% of the outer diameter of the power line core 1, and the cable core is sequentially coated with a polyester fiber plain weave lapping layer 5, a shielding mesh conductor layer 6 and a polyvinyl chloride outer sheath 7.

As shown in fig. 2, the communication wire core 2 includes two insulated twisted-pair wire cores 21 and two para-type wholly aromatic copolyamide drawn fiber cores 22 twisted together to form a communication wire core, and specifically, the outer diameter ratio of the insulated twisted-pair wire cores 21 to the para-type wholly aromatic copolyamide drawn fiber cores 22 is 1.15:1 to 1.3: 1. The insulating twisted-pair wire core 21 comprises two twisted-pair wire cores 23 and a drain wire 29 which are twisted together to form a twisted-pair core body, the drain wire 29 is located at the position of a gap between the two twisted-pair wire cores 23 and close to the central line of the communication wire core 2, and the central point of the drain wire 29 is connected with the diameter of the communication wire core 2 to be coincided. The outside cladding of twisted pair core has foamed polypropylene insulating layer 24, twisted pair sinle silk 23 includes first inner conductor 25 and FEP insulating layer 26, the outside cladding in proper order of communication line core has the copper to mould the compound area around covering 27 and first polyurethane oversheath 28. In one embodiment, the copper-plastic composite tape wrapping layer 27 is a copper-plastic composite tape multi-layer spiral lapping and wrapping structure, and the copper-plastic composite tape comprises a copper foil tape inner layer and a PET film outer layer.

Control sinle silk 3 includes that six coaxial insulation sinle silks 31 strand around a counterpoint type wholly aromatic copolyamide tensile fiber rope 32 forms the control core, the outside cladding PET resin area in proper order of control core is around covering 33, copper wire shielding winding layer 34 and second polyurethane oversheath 35, coaxial insulation sinle silk 31 includes second inner conductor 36, the outside cladding in proper order of second inner conductor 36 has foamed fluororesin to wind covering inner insulating layer 37 and fluororesin outer insulating layer 38. In one embodiment, the PET resin tape wrapping layer 33 is a PET resin tape one-way spiral lapping and wrapping structure, and the PET resin tape comprises an outer PET resin base layer and an inner thermoplastic polyurethane bonding layer. In one embodiment, the copper wire shielding winding layer 34 is formed by spirally winding an inner layer and an outer layer of tinned copper wires in the same direction, the winding distance and the spiral angle degree of the inner layer tinned copper wires and the outer layer tinned copper wires are the same, the wire diameter of the inner layer tinned copper wires is smaller than that of the outer layer tinned copper wires, the wire diameter of the inner layer tinned copper wires is 0.05mm to 0.12mm, and the wire diameter of the outer layer tinned copper wires is 0.08mm to 0.18 mm.

The power supply wire core 1 comprises a plurality of insulated wire cores 11 which are jointly stranded around a para-type wholly aromatic copolyamide drawn fiber core 12 to form a power supply wire core, and the lay length of the power supply wire core is preferably 10 to 20 times of the outer diameter of the power supply wire core 1. Specifically, the outer diameter of the para-type wholly aromatic copolyamide drawn fiber core material 12 is 0.9 to 1.8 times the outer diameter of the insulated wire core 11. The power cord core body is coated with a PTFE (polytetrafluoroethylene) wrapping tape layer 13 and a silane grafted and crosslinked high-density polyethylene sheath 14 in sequence, and the power cord core body 1 comprises a third inner conductor 15 and a silane grafted and crosslinked low-density polyethylene insulating layer 16. In one embodiment, the third inner conductor 15 is formed by twisting several tinned copper monofilaments having a diameter of 0.1mm to 0.35mm and several para-type wholly aromatic copolyamide drawn fibers.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. Bending-resistant and extrusion-resistant multi-core communication cable, which is characterized in that: the communication cable comprises two power supply wire cores (1), a communication wire core (2) and a control wire core (3) which are jointly stranded with a PFA resin filling core material (4) to form a cable core, wherein the outer diameter ratio of the communication wire core (2) to the control wire core (3) is 0.95:1 to 1.05:1, the outer diameter of the communication wire core (2) is not more than 70% of the outer diameter of the power supply wire core (1), a polyester fiber plain weave lapping layer (5), a shielding mesh conductor layer (6) and a polyvinyl chloride outer sheath (7) are sequentially coated outside the cable core, the communication wire core (2) comprises two insulation twisted wire cores (21) and two para-type wholly copolymerized aromatic amide stretched fiber core strips (22) which are jointly stranded to form a communication wire core body, the insulation twisted wire core (21) comprises two twisted wire cores (23) and a drain wire (29) which are jointly stranded to form a twisted wire core body, the utility model discloses a communication cable core, including communication cable core (2), drainage wire (29) and communication line core (23), clearance department and being close to between two pair twist wire cores (23) communication line core (2) central line sets up, two the central point line of drainage wire (29) with communication line core (2) diameter coincides, the outside cladding of pair twist wire core has foamed polypropylene insulating layer (24), pair twist wire core (23) include first inner conductor (25) and FEP insulating layer (26), the outside cladding of communication line core has copper to mould compound area around covering (27) and first polyurethane oversheath (28) in proper order.

2. The bend-resistant crush-resistant multi-core communication cable as recited in claim 1, wherein: the ratio of the outer diameters of the insulated twisted-pair wire core (21) and the para-type wholly aromatic copolyamide drawn fiber core (22) is 1.15:1 to 1.3: 1.

3. The bend-resistant crush-resistant multi-core communication cable as recited in claim 1, wherein: the copper-plastic composite tape wrapping layer (27) is of a copper-plastic composite tape multi-layer spiral lapping and covering wrapping structure, and the copper-plastic composite tape comprises a copper foil tape inner layer and a PET film outer layer.

4. The bend-resistant crush-resistant multi-core communication cable as recited in claim 1, wherein: control sinle silk (3) include that six coaxial insulation sinle silks (31) twine around a counterpoint type wholly aromatic copolyamide tensile fiber rope (32) and form the control core, the outside cladding PET resin area in proper order of control core is around covering (33), copper wire shielding winding layer (34) and second polyurethane oversheath (35), coaxial insulation sinle silk (31) include second inner conductor (36), second inner conductor (36) outside cladding in proper order has foaming fluororesin to wind covering inner insulating layer (37) and fluororesin outer insulating layer (38).

5. The bend-resistant crush-resistant multi-core communication cable of claim 4, wherein: the PET resin area is taken to cover around the package structure for PET resin takes one-way spiral around package layer (33), the PET resin area includes the PET resin basic unit in the outside and the inboard thermoplastic polyurethane adhesive linkage.

6. The bend-resistant crush-resistant multi-core communication cable of claim 4, wherein: copper line shielding winding layer (34) forms for inside and outside double-deck tinned copper wire syntropy spiral winding, and the winding distance and the helix angle degree of inlayer tinned copper wire and outer tinned copper wire are all the same, inlayer tinned copper wire line footpath is less than outer tinned copper wire line footpath, inlayer tinned copper wire line footpath is 0.05mm to 0.12mm, outer tinned copper wire line footpath is 0.08mm to 0.18 mm.

7. The bend-resistant crush-resistant multi-core communication cable as recited in claim 1, wherein: the power supply core (1) comprises a plurality of insulated cores (11) which are jointly stranded around a para-type wholly aromatic copolyamide drawn fiber core (12) to form a power supply core body, a PTFE (polytetrafluoroethylene) wrapping tape layer (13) and a silane grafted crosslinked high-density polyethylene sheath (14) are sequentially wrapped outside the power supply core body, and the power supply core (1) comprises a third inner conductor (15) and a silane grafted crosslinked low-density polyethylene insulating layer (16).

8. The bend-resistant crush-resistant multi-core communication cable as recited in claim 7, wherein: the third inner conductor (15) is formed by twisting a plurality of tin-plated copper monofilaments with the diameter of 0.1mm to 0.35mm and a plurality of para-type wholly aromatic copolyamide drawn fibers.

9. The bend-resistant crush-resistant multi-core communication cable as recited in claim 7, wherein: the lay length of the power cord core body is 10-20 times of the outer diameter of the power cord core body (1).

10. The bend-resistant crush-resistant multi-core communication cable as recited in claim 1, wherein: the outer diameter of the para-type wholly aromatic copolyamide drawn fiber core material (12) is 0.9 to 1.8 times of the outer diameter of the insulated wire core (11).