CN214624496U - Twist-resistant water-blocking insulated cable - Google Patents
Twist-resistant water-blocking insulated cable Download PDFInfo
- Publication number
- CN214624496U CN214624496U CN202120941362.6U CN202120941362U CN214624496U CN 214624496 U CN214624496 U CN 214624496U CN 202120941362 U CN202120941362 U CN 202120941362U CN 214624496 U CN214624496 U CN 214624496U
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- China
- Prior art keywords
- cable
- twist
- core
- insulated cable
- layer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- -1 polypropylene Polymers 0.000 claims abstract description 19
- 239000004743 Polypropylene Substances 0.000 claims abstract description 17
- 229920001155 polypropylene Polymers 0.000 claims abstract description 17
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 7
- 238000005253 cladding Methods 0.000 claims abstract description 6
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 5
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 5
- 229910000077 silane Inorganic materials 0.000 claims abstract description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000017105 transposition Effects 0.000 claims abstract 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 4
- 239000004020 conductor Substances 0.000 abstract description 6
- 240000005572 Syzygium cordatum Species 0.000 abstract description 4
- 235000006650 Syzygium cordatum Nutrition 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 4
- 230000001934 delay Effects 0.000 abstract description 2
- 238000004132 cross linking Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 27
- 239000005020 polyethylene terephthalate Substances 0.000 description 13
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- Insulated Conductors (AREA)
Abstract
The utility model discloses a resistant type of twisting blocks water insulated cable, constitute the cable core including four power sinle silks and four polyethylene resin plug transposition jointly, four power sinle silks total sectional area do 50% to 65% of cable core sectional area, the cable core outside cladding in proper order has silane grafting crosslinking low density polyethylene insulating layer, butyl rubber dampproof course, polypropylene hygroscopic layer and CPE oversheath, and power sinle silk includes that four strand bunches twist structure line core, and the external cladding of sinle silk has PET wrap ply, and the strand is that a plurality of tin-plated copper monofilament bunches twist constitute, and tin-plated copper monofilament footpath is 0.02mm to 0.05 mm. The cable can effectively reduce friction between conductor copper wires, has better flexibility and distortion resistance, effectively prevents conductor disconnection, has excellent waterproof and moistureproof performances, delays water tree aging, has excellent insulating performance, and improves the safety and reliability of cable use.
Description
Technical Field
The application relates to the technical field of cables, in particular to a twist-resistant water-blocking insulated cable.
Background
A large number of cables are applied to a low-voltage power distribution system, the high polymer materials for the cables, except polyvinyl chloride, have the largest consumption of polyolefin, wherein polyethylene and polypropylene are most commonly used, and the high polymer materials are commonly used for manufacturing insulating layers of various wires and cables due to good physical and mechanical properties, high heat resistance, excellent electrical insulation and chemical stability. However, the inner conductor of the cable is generally formed by concentrically twisting multiple layers of strands, and after the cable is twisted and bent to different degrees, friction is generated between the strands of each layer, so that the cable is easy to break, and the cable is poor in durability and usability. Moreover, due to manufacturing conditions, weather and other reasons, the low-voltage cable is difficult to avoid moisture permeating into the cable, and under the action of an electric field, the water tree aging phenomenon can occur, so that the cable is damaged in insulation and is not durable in use.
SUMMERY OF THE UTILITY MODEL
This application is not enough to prior art, and the technical problem that solve provides a resistant distortion type insulated cable that blocks water, can effectual reduction friction between the conductor copper wire, has better pliability, resistant distortion characteristic, prevents effectively that the conductor disconnection phenomenon from taking place, has excellent dampproofing and waterproofing performance, delays the ageing phenomenon of water tree, and insulating properties is excellent, improves the fail safe nature of cable use.
The present application solves the above-mentioned problems by the following technical solutions.
Twist-resistant type insulated cable that blocks water includes that four power sinle silks and four polyethylene resin plug twist jointly constitute the cable core, four power sinle silks total sectional area do 50% to 65% of cable core sectional area, the cable core outside cladding has silane grafting crosslinked low density polyethylene insulating layer, butyl rubber dampproof course, polypropylene hygroscopic layer and CPE oversheath in proper order, the power sinle silk includes that four strand bunches twist structure line core, the outside cladding of line core has PET to wind the band layer, the strand comprises a plurality of tin-plated copper monofilament bunches, tin-plated copper monofilament diameter is 0.02mm to 0.05 mm.
Preferably, the outer diameter of the polyethylene resin core rod is smaller than the outer diameter of the power wire core.
Preferably, the outer diameter of the polyethylene resin core rod is one third to two fifths of the outer diameter of the power wire core.
Preferably, the CPE outer sheath has a thickness of 2.2mm to 4.8 mm.
Preferably, the outer diameter of the CPE outer sheath is 38mm to 52 mm.
Preferably, the thickness of the polypropylene moisture absorption layer is 0.15mm to 0.4 mm.
Preferably, the polypropylene moisture absorption layer is a multi-layer overlapping wrapping structure of polypropylene resin tapes.
Preferably, the lay length of the cable core is 10 to 20 times of the outer diameter of the power wire core.
Preferably, the PET lapping tape layer is a PET resin tape one-way spiral lapping and covering lapping structure.
Preferably, the PET resin tape includes an outer PET resin base layer and an inner thermoplastic polyurethane adhesive layer.
The beneficial effect of this application:
1. the four power wire cores and the four polyethylene resin core rods are mutually twisted, the outer diameter of each polyethylene resin core rod is smaller than that of each power wire core, the circular section of the cable is easily ensured, a gap is formed in the center of the cable core, the total sectional area of the power wire cores is 50% -65% of that of the cable core, the gap in the cable core is beneficial to reducing the friction force between the power wire cores and the polyethylene resin core rods, the occurrence of wire breakage and core breakage is favorably prevented, and the flexibility and the distortion resistance of the cable are improved.
2. The power sinle silk is four strand bunches hank constitution line cores, it is the same not to establish central strand and make to bear the friction between each strand, life cycle is impartial, the strand that the premature fatigue broken string is difficult for appearing takes place, the thermoplastic polyurethane adhesive linkage in PET resin area bonds together with strand surface heat fusion, the pliability is better, improve the resistant distortion performance, the tinned copper monofilament of strand is difficult for taking place to warp the broken string, thereby, the resistant distortion characteristic of inner conductor has been improved, the service life is prolonged, and the durability is better.
3. Through butyl rubber dampproof course, polypropylene hygroscopic layer and CPE oversheath combined use, have good water-fast fire behaviour concurrently, optimize the thickness design, receive operating mode condition and weather reason etc. after polypropylene hygroscopic layer absorbed moisture, because the excellent dampproofing characteristic of butyl rubber dampproof course, effectual separation moisture has delayed the insulating layer and has taken place the ageing phenomenon of water tree to the insulating layer, thereby protected the electrical insulation characteristic of cable, delayed life.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.
Description of reference numerals:
the cable comprises a power wire core, a 2-polyethylene resin core rod, a 3-silane grafted cross-linked low-density polyethylene insulating layer, a 4-butyl rubber moisture-proof layer, a 5-polypropylene moisture-absorption layer, a 6-CPE outer sheath, a 7-folded yarn and an 8-PET wrapping tape layer.
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 twist-resistant water-blocking insulated cable according to the embodiment of the present application includes four power cores 1 and four polyethylene resin core rods 2, which are twisted together to form a cable core, wherein a total cross-sectional area of the four power cores 1 is 50% to 65% of a cross-sectional area of the cable core, further, an outer diameter of the polyethylene resin core rod 2 is smaller than an outer diameter of the power core 1, and further, an outer diameter of the polyethylene resin core rod 2 is one third to two fifths of an outer diameter of the power core 1. The lay length of the cable core is 10-20 times of the outer diameter of the power supply wire core 1.
The cable core is coated with a silane grafted crosslinked low-density polyethylene insulating layer 3, a butyl rubber moisture-proof layer 4, a polypropylene moisture-absorbing layer 5 and a CPE outer sheath 6 in sequence, and the thickness of the CPE outer sheath 6 is 2.2mm to 4.8 mm. The outer diameter of the CPE outer sheath 6 is 38mm to 52 mm. In one embodiment, the polypropylene moisture absorption layer 5 is a multi-layer lapped wrapping structure of polypropylene resin tapes, and preferably, the thickness of the polypropylene moisture absorption layer 5 is 0.15mm to 0.4 mm.
The power supply wire core 1 comprises a wire core body formed by twisting 7 strands, a PET (polyethylene terephthalate) wrapping band layer 8 wraps the outside of the wire core body, the strands 7 are formed by twisting a plurality of tinned copper monofilament bundles, and the diameter of the tinned copper monofilament is 0.02mm to 0.05 mm. In one embodiment, the PET tape layer 8 is a PET resin tape one-way spiral lapping and wrapping structure, and further, the PET resin tape comprises an outer PET resin base layer and an inner thermoplastic polyurethane adhesive layer.
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 (10)
1. Resistant distortion type insulated cable that blocks water, characterized by: including four power sinle silk (1) and four polyethylene resin plug (2) transposition constitution cable core jointly, the total sectional area of four power sinle silks (1) does 50% to 65% of cable core sectional area, the cable core outside cladding has silane grafting crosslinked low density polyethylene insulating layer (3), butyl rubber dampproof course (4), polypropylene hygroscopic layer (5) and CPE oversheath (6) in proper order, power sinle silk (1) includes four strand (7) bundle transposition constitution line core, the outside cladding of line core has PET around band layer (8), strand (7) are a plurality of tin-plated copper monofilament bundle transposition constitutions, tin-plated copper monofilament footpath is 0.02mm to 0.05 mm.
2. The twist-resistant water-blocking insulated cable of claim 1, wherein: the outer diameter of the polyethylene resin core rod (2) is smaller than that of the power wire core (1).
3. The twist-resistant water-blocking insulated cable of claim 2, wherein: the outer diameter of the polyethylene resin core rod (2) is one third to two fifths of the outer diameter of the power wire core (1).
4. The twist-resistant water-blocking insulated cable of claim 1, wherein: the CPE outer sheath (6) has a thickness of 2.2mm to 4.8 mm.
5. The twist-resistant water-blocking insulated cable of claim 1, wherein: the outer diameter of the CPE outer sheath (6) is 38mm to 52 mm.
6. The twist-resistant water-blocking insulated cable of claim 1, wherein: the thickness of the polypropylene moisture absorption layer (5) is 0.15mm to 0.4 mm.
7. The twist-resistant water-blocking insulated cable of claim 1, wherein: the polypropylene moisture absorption layer (5) is of a multi-layer overlapping wrapping structure with polypropylene resin tapes.
8. The twist-resistant water-blocking insulated cable of claim 1, wherein: the lay length of the cable core is 10-20 times of the outer diameter of the power wire core (1).
9. The twist-resistant water-blocking insulated cable of claim 1, wherein: the PET wrapping belt layer (8) is a PET resin belt one-way spiral lapping and covering wrapping structure.
10. The twist-resistant water-blocking insulated cable of claim 9, wherein: the PET resin belt comprises a PET resin base layer on the outer side and a thermoplastic polyurethane bonding layer on the inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120941362.6U CN214624496U (en) | 2021-05-06 | 2021-05-06 | Twist-resistant water-blocking insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120941362.6U CN214624496U (en) | 2021-05-06 | 2021-05-06 | Twist-resistant water-blocking insulated cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214624496U true CN214624496U (en) | 2021-11-05 |
Family
ID=78406746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120941362.6U Expired - Fee Related CN214624496U (en) | 2021-05-06 | 2021-05-06 | Twist-resistant water-blocking insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214624496U (en) |
-
2021
- 2021-05-06 CN CN202120941362.6U patent/CN214624496U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |