CN212010392U - Tensile-resistant elevator shielding flat cable - Google Patents
Tensile-resistant elevator shielding flat cable Download PDFInfo
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- CN212010392U CN212010392U CN202020825848.9U CN202020825848U CN212010392U CN 212010392 U CN212010392 U CN 212010392U CN 202020825848 U CN202020825848 U CN 202020825848U CN 212010392 U CN212010392 U CN 212010392U
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Abstract
The utility model discloses a tensile resistance type elevator shielding flat cable, including being one row of three insulation coaxial line, four insulation multicore wires and two tensile steel strand wires of arranging and the axis is located the coplanar, the outside common cladding polyvinyl chloride foaming layer of three insulation coaxial line forms first line core body, the outside common cladding polyvinyl chloride foaming layer of two insulation multicore wires forms second line core body, the rest two outside common cladding polyvinyl chloride foaming layers of insulation multicore wires form third line core body, first line core body is located in the middle of and the left and right sides symmetry sets gradually two tensile steel strand wires second line core body with third line core body forms the cable core jointly, the outside cladding of cable core has butyronitrile polyvinyl chloride oversheath. The flat cable is high in mechanical strength, strong in tensile resistance and better in bending resistance, and the safety and reliability of the flat cable are effectively improved.
Description
Technical Field
The utility model relates to the technical field of cables, especially, relate to a tensile resistance type elevator shielding flat cable.
Background
The flat cable is used in mobile electrical equipment, is suitable for frequently-bent occasions, is widely applied to the connection of electrical appliances between mobile electric equipment in severe environments such as travelling, power generation, metallurgy, transportation, machinery, electricity, mines and the like, and the connection of power supplies of various mobile power devices and control signal illuminating lamps, such as a fast-operating container crane and hoisting equipment, can be used in occasions with higher mechanical stress such as large-scale equipment, excavators, ground and underground mining and the like, such as: port lifting equipment, bucket wheel machines, and the like. The flat cable has the characteristics of easy arrangement, softness, no knotting in bending and the like, and is suitable for functions of power control, illumination, communication and the like of the elevator. The flat cable that elevator used in the building is long in size, heavy in weight, apply the tension increase of steel strand wires in the cable, produce bigger moment of torsion thereupon, make the cable have the potential safety hazard of taking place the distortion, and, owing to bear great mechanical shock pulling force, at the long axial both ends local stress concentration in flat cable section, mechanical strength is on the low side, when flat cable is crooked, the steel strand wires of configuration at both ends can be towards inboard insulating sinle silk skew, make stress concentration in insulating sinle silk, and damage insulating sinle silk easily, influence flat cable's fail safe nature.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art not enough, the technical problem that solve provides a flat cable of stretch resistance type elevator shielding, and mechanical strength is high, and the stretching resistance effect is strong, and bending resistance is better, effectively improves the fail safe nature of flat cable.
The utility model discloses a make above-mentioned technical problem solve through following technical scheme.
Stretch-proofing type elevator shielding flat cable, including being one row of three insulation coaxial line, four insulation multicore wires and two tensile steel strand wires that arrange and the axis is located the coplanar, the outside common cladding polyvinyl chloride foaming layer of three insulation coaxial line forms first core body, the outside common cladding polyvinyl chloride foaming layer of two insulation multicore wires forms second core body, the rest two outside common cladding polyvinyl chloride foaming layers of insulation multicore wires form third core body, first core body is located in the middle of and the left and right sides symmetry sets gradually two tensile steel strand wires second core body with the third core body forms the cable core jointly, the outside cladding of oversheath cable core has butyronitrile polyvinyl chloride.
Preferably, the two tensile steel strands are twisted in opposite directions.
As preferred, the insulated coaxial line includes the inner conductor and the outer cladding in proper order of inner conductor has PET winding area, silane grafting crosslinked low density polyethylene inner insulating layer, ETFE outer insulating layer, metal woven shield and PTFE around the covering, the inner conductor includes the center conductor and centers on in proper order the outside stranded inner conductor group and the outer conductor group of center conductor, the inner conductor group comprises the concentric transposition of a plurality of inner conductor, the outer conductor group comprises the concentric transposition of a plurality of outer conductor, the inner conductor group with outer conductor group transposition opposite direction, the lay length of inner conductor group is less than outer conductor group lay length.
Preferably, the thickness of the silane grafted cross-linked low-density polyethylene inner insulating layer is greater than that of the ETFE outer insulating layer.
Preferably, the central conductor, the inner conductor and the outer conductor are all formed by bundling a plurality of tinned copper monofilaments, and the diameter of each tinned copper monofilament is 0.02mm to 0.08 mm.
Preferably, the insulated multi-core wire comprises an insulated wire core, a fluororesin winding belt layer is coated outside the insulated wire core, the insulated wire core comprises a PFA resin filling core material at the central part and a plurality of coaxial wires concentrically twisted around the PFA resin filling core material, and the coaxial wires comprise a conductor, and an inner insulating layer, a metal winding shielding layer and an outer insulating layer which are sequentially coated outside the conductor.
Preferably, the inner insulating layer is a silane-grafted crosslinked low-density polyethylene insulating layer, and the outer insulating layer is a silane-grafted crosslinked high-density polyethylene insulating layer.
Preferably, the metal winding shielding layer is formed by mixing two tinned copper monofilaments with different diameters in a unidirectional spiral winding mode, the spiral angle is 25 degrees to 40 degrees, the diameter ratio of the tinned copper wires with the two different diameters is between 0.9 and 1, and the diameter is 0.02mm to 0.05 mm.
Preferably, the thickness ratio of the polyvinyl chloride foaming layer to the butyronitrile polyvinyl chloride outer sheath is 1:1 to 1: 2.5.
The utility model has the advantages that:
1. insulating coaxial line and insulating multicore line cladding polyvinyl chloride foaming layer respectively form independent first core body, second core body and third core body, and separate and wrap butyronitrile polyvinyl chloride oversheath jointly through two tensile steel strand wires, make and keep the interval of multilayer resin layer between tensile steel strand wires and the adjacent insulating coaxial line and the insulating multicore line, slow down the long axial both sides tip local stress concentration in flat cable section, when having improved mechanical structure intensity, the stretching resistance performance has been improved greatly, when flat cable is crooked, can effectually avoid tensile steel strand wires towards the skew of adjacent heart yearn, eliminate the potential safety hazard that the adjacent heart yearn of damage brought. The twisting directions of the two tensile steel strands are opposite, so that the torque force can be reduced and the safety and reliability can be improved in the process of bending and twisting the cable.
2. The butyronitrile polyvinyl chloride outer sheath has higher tensile strength and elongation, is not easy to tear after being bent and twisted for a long time, effectively protects the polyvinyl chloride foaming layer, and is beneficial to improving the bending resistance and the torsion resistance.
3. The insulated wire core is formed by concentrically twisting the PFA resin filled core material and the coaxial wire, a gap is formed between the PFA resin filled core material and the coaxial wire, the flexibility is good, the tensile strength is increased, the wire is not easy to break, the torque force in the twisting and bending process is effectively reduced, and the bending resistance and the twisting resistance are improved.
4. The central conductor, the inner conductor and the outer conductor are formed by twisting tinned copper monofilaments with the diameters of 0.02mm to 0.08mm in a bundle mode, the bending resistance is improved, the tensile strength is high, and the electrical characteristics of good long-distance signal transmission are guaranteed. Compared with the inner conductor and the outer conductor which have the same tensile strength, the tensile strength of the inner conductor is greater than that of the outer conductor, and the bending resistance of the cable is improved.
The ETFE outer insulating layer has excellent wear resistance, bending resistance and heat resistance, the silane grafted and crosslinked low-density polyethylene inner insulating layer has small static friction coefficient and better flexibility, the thickness of the silane grafted and crosslinked low-density polyethylene inner insulating layer is larger than that of the ETFE outer insulating layer, and the insulating layer has better bending resistance and flexibility and is durable and practical on the premise of obtaining excellent wear resistance by optimizing the thickness proportion.
6. The metal braided shielding layer can effectively inhibit internal signals or noise from leaking to the outside and inhibit interference from external signals, and meanwhile, the PTFE wrapping layer is adopted, so that the friction coefficient is small, the stress concentration of the metal braided shielding layer is reduced, the torque force during bending is reduced, and the flexing resistance and durability are improved.
Drawings
FIG. 1 is a schematic cross-sectional structural view of an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of an insulated coaxial cable according to an embodiment of the present application;
fig. 3 is a schematic cross-sectional view of an insulated multi-core wire according to an embodiment of the present invention.
In the figure: 1-insulated coaxial wire, 11-inner conductor, 111-central conductor, 112-inner conductor, 113-outer conductor, 12-PET winding tape, 13-silane grafted cross-linked low-density polyethylene inner insulation layer, 14-ETFE outer insulation layer, 15-metal braided shielding layer, 16-PTFE winding layer, 2-insulated multi-core wire, 21-fluororesin winding layer, 22-PFA resin filled core material, 23-coaxial wire, 231-conductor, 232-inner insulation layer, 233-metal wound shielding layer, 234-outer insulation layer, 3-tensile steel stranded wire, 4-polyvinyl chloride foam layer, 5-first core body, 6-second core body, 7-third core body and 8-butyronitrile polyvinyl chloride outer sheath.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses tensile resistance type elevator shielding flat cable, including being one row of arranging and the axis is located coplanar three insulation coaxial line 1, four insulation multicore wires 2 and two tensile steel strand wires 3, 1 outside common cladding polyvinyl chloride foaming layer 4 of three insulation coaxial line forms first line core 5, two 2 outside common cladding polyvinyl chloride foaming layers 4 of insulation multicore wires form second line core 6, the remainder 2 outside common cladding polyvinyl chloride foaming layers 4 of two insulation multicore wires form third line core 7, first line core 5 is located the middle and left and right sides foaming symmetry in proper order and sets up two tensile steel strand wires 3 second line core 6 with third line core 7 forms the butyronitrile cable core jointly, the outside cladding of cable core has polyvinyl chloride oversheath 8. The tensile steel strands 3 are, for example, galvanized steel wires or stainless steel strands, and preferably, the two tensile steel strands 3 are twisted in opposite directions to reduce torque. Further, the thickness ratio of the polyvinyl chloride foam layer 4 to the butyronitrile polyvinyl chloride outer sheath 8 is 1:1 to 1: 2.5.
As shown in fig. 2, in a specific embodiment, the insulated coaxial cable 1 includes an inner conductor 11, where the inner conductor 11 includes a central conductor 111, and an inner conductor set and an outer conductor set that are sequentially twisted around the outside of the central conductor 111, the inner conductor set is formed by concentrically twisting a plurality of inner conductors 112, the outer conductor set is formed by concentrically twisting a plurality of outer conductors 113, the twisting directions of the inner conductor set and the outer conductor set are opposite, and the twisting pitch of the inner conductor set is smaller than the twisting pitch of the outer conductor set. Specifically, the central conductor 111, the inner conductor 112 and the outer conductor 113 are all formed by bundling and twisting a plurality of tin-plated copper monofilaments, and the diameter of each tin-plated copper monofilament is 0.02mm to 0.08 mm.
The external portion of the inner conductor 11 is sequentially coated with a PET winding belt 12, a silane grafted cross-linked low-density polyethylene inner insulating layer 13, an ETFE outer insulating layer 14, a metal braided shielding layer 15 and a PTFE winding layer 16. Preferably, the thickness of the silane grafted crosslinked low density polyethylene inner insulation layer 13 is greater than that of the ETFE outer insulation layer 14. In one embodiment, the PET wrapping tape 12 is a three-layer lap wound structure and the lap ratio is not less than 60%. In one embodiment, the metal shielding layer 15 is formed by weaving inner layer tin-plated copper monofilaments and outer layer tin-plated copper monofilaments in a reverse spiral winding manner, wherein the diameter of the inner layer tin-plated copper monofilaments is smaller than that of the outer layer tin-plated copper monofilaments, for example, the diameter of the inner layer tin-plated copper monofilaments is 0.08mm to 0.12mm, and the diameter of the outer layer tin-plated copper monofilaments is 0.1mm to 0.15 mm. In one embodiment, the PTFE tape 16 is a gap-lapped structure and the pitch is 2 to 4 times the tape width.
As shown in fig. 3, the insulated multi-core wire 2 includes an insulated wire core and a fluororesin wrapping layer 21 is coated outside the insulated wire core, for example, a PTFE, PFA, FEP or ETFE resin layer may be used as the fluororesin wrapping layer 21. The insulated wire core comprises a PFA resin filling core material 22 at the center part and a plurality of coaxial wires 23 concentrically twisted around the PFA resin filling core material 22, wherein each coaxial wire 23 comprises a conductor 231, an inner insulating layer 232, a metal winding shielding layer 233 and an outer insulating layer 234, wherein the inner insulating layer 232, the metal winding shielding layer 233 and the outer insulating layer 234 are sequentially coated outside the conductor 231. Specifically, the conductor 231 is formed by twisting a plurality of tinned copper monofilaments. In one embodiment, the inner insulating layer 232 is a silane-grafted cross-linked low density polyethylene insulating layer, the outer insulating layer 234 is a silane-grafted cross-linked high density polyethylene insulating layer, and further, the thickness of the inner insulating layer 232 is 0.025mm to 0.08mm, and the thickness of the outer insulating layer 234 is 0.025mm to 0.05 mm. In one embodiment, the metal-wound shield layer 233 is formed by mixing two different diameters of tin-plated copper wire with a unidirectional spiral winding and a spiral angle of 25 to 40 degrees, and the diameter ratio of the two different diameters of tin-plated copper wire is between 0.9 and 1 and the diameter is 0.02 to 0.05 mm.
While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the claims of the present application belong to the protection scope of the present invention.
Claims (9)
1. Tensile resistance type elevator shielding flat cable, characterized by: comprises three insulated coaxial wires (1) which are arranged in a row and the axes of which are positioned on the same plane, four insulated multi-core wires (2) and two tensile steel stranded wires (3), the three insulated coaxial wires (1) are coated with a polyvinyl chloride foam layer (4) to form a first wire core body (5), the two insulating multi-core wires (2) are coated with polyvinyl chloride foam layers (4) to form a second wire core body (6), the other two insulating multi-core wires (2) are coated with polyvinyl chloride foam layers (4) to form a third wire core body (7), first line core body (5) are located the centre and the left and right sides symmetry sets gradually two tensile steel strand wires (3), second line core body (6) with third line core body (7) form the cable core jointly, the outside cladding of cable core has butyronitrile polyvinyl chloride oversheath (8).
2. The tension resistant elevator shielding flat cable of claim 1, characterized in that: the twisting directions of the two tensile steel strands (3) are opposite.
3. The tension resistant elevator shielding flat cable of claim 1, characterized in that: insulating coaxial line (1) include inner conductor (11) and inner conductor (11) outside cladding in proper order has PET winding area (12), silane grafting cross-linking low density polyethylene inner insulating layer (13), ETFE outer insulating layer (14), metal braiding shielding layer (15) and PTFE around covering (16), inner conductor (11) include central conductor (111) and center on in proper order the outer stranded inner conductor group and the outer conductor group of central conductor (111) outside transposition, inner conductor group comprises the concentric transposition of a plurality of inner conductor (112), outer conductor group comprises the concentric transposition of a plurality of outer conductor (113), inner conductor group with outer conductor group transposition opposite direction, the lay length of inner conductor group is less than outer conductor group lay length.
4. The tension resistant elevator shielded flat cable of claim 3, wherein: the thickness of the silane grafted cross-linked low-density polyethylene inner insulating layer (13) is larger than that of the ETFE outer insulating layer (14).
5. The tension resistant elevator shielded flat cable of claim 3, wherein: the central conductor (111), the inner conductor (112) and the outer conductor (113) are all formed by bundling and twisting a plurality of tinned copper monofilaments, and the diameter of each tinned copper monofilament is 0.02mm to 0.08 mm.
6. The tension resistant elevator shielding flat cable of claim 1, characterized in that: the insulated multi-core wire (2) comprises an insulated wire core, a fluororesin winding belting layer (21) is coated outside the insulated wire core, the insulated wire core comprises a PFA resin filling core material (22) at the center part and a plurality of coaxial wires (23) concentrically twisted around the PFA resin filling core material (22), and each coaxial wire (23) comprises a conductor (231), an inner insulating layer (232), a metal winding shielding layer (233) and an outer insulating layer (234) which are sequentially coated outside the conductor (231).
7. The tension resistant elevator shielded flat cable of claim 6, wherein: the inner insulating layer (232) is a silane grafted and crosslinked low-density polyethylene insulating layer, and the outer insulating layer (234) is a silane grafted and crosslinked high-density polyethylene insulating layer.
8. The tension resistant elevator shielded flat cable of claim 6, wherein: the metal winding shielding layer (233) is formed by mixing two tinned copper monofilaments with different diameters in a unidirectional spiral winding mode, the spiral angle is 25-40 degrees, the diameter ratio of the tinned copper wires with the two different diameters is between 0.9-1, and the diameter is 0.02-0.05 mm.
9. The tension resistant elevator shielding flat cable of claim 1, characterized in that: the thickness ratio of the polyvinyl chloride foaming layer (4) to the butyronitrile polyvinyl chloride outer sheath (8) is 1:1 to 1: 2.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020825848.9U CN212010392U (en) | 2020-05-18 | 2020-05-18 | Tensile-resistant elevator shielding flat cable |
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| CN202020825848.9U CN212010392U (en) | 2020-05-18 | 2020-05-18 | Tensile-resistant elevator shielding flat cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111462937A (en) * | 2020-05-18 | 2020-07-28 | 浙江物产中大线缆有限公司 | Tensile-resistant elevator shielding flat cable and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111462937A (en) * | 2020-05-18 | 2020-07-28 | 浙江物产中大线缆有限公司 | Tensile-resistant elevator shielding flat cable and preparation method thereof |
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