CN203706729U - Water blocking water-tree-resistant medium-voltage power cable - Google Patents
Water blocking water-tree-resistant medium-voltage power cable Download PDFInfo
- Publication number
- CN203706729U CN203706729U CN201420071344.7U CN201420071344U CN203706729U CN 203706729 U CN203706729 U CN 203706729U CN 201420071344 U CN201420071344 U CN 201420071344U CN 203706729 U CN203706729 U CN 203706729U
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- water blocking
- tree
- blocking
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Abstract
The utility model discloses a water blocking water-tree-resistant medium-voltage power cable, which relates to the technical field of cable manufacturing. The water blocking water-tree-resistant medium-voltage power cable comprises three strands of wire cores, wherein a cabling layer, a longitudinally-wrapped dual-surface PE film composite aluminum-plastic belt water blocking layer, an internal sheath layer made of PE plastic, a galvanized double-layer steel belt armor layer and a high-density polyethylene HDPE sheath layer are sequentially arranged outside the three strands of wire cores; a water blocking rubber filling layer is arranged between the three strands of wire cores and the cabling layer; each strand of wire core respectively comprises a water blocking conductor formed by regularly twisting a plurality of soft copper wires and water blocking fine yarns and is painted with rubber between single wires of each layer of soft copper wires, and the compression coefficient of the water blocking conductors is greater than 0.94; a conductor shielding layer, a water-tree-resistant crosslinked polyethylene insulating layer and an insulative shielding layer are sequentially extruded outside each water blocking conductor through a three-layer co-extrusion technology; and a semiconductive water blocking belt layer, a copper belt shielding layer and a water blocking belt wrapping layer are sequentially arranged outside each insulative shielding layer. The water blocking water-tree-resistant medium-voltage power cable is innovative in structure, improves the stability and safety, prolongs the service life of the cable, and reduces the power supply cost.
Description
Technical field
The utility model relates to cables manufacturing technical field.
Background technology
Power cable with cross-linked polyethylene insulation (hereinafter to be referred as crosslinked cable), because it has good electric property and mechanical and physical performance, and production technology is simple, structure is light, transmission capacity is large, mounting and installation and maintaining convenient, be not subject to the advantages such as drop restriction, extensively being subject to user welcomes, particularly along with the fast development of Chinese national economy, deepening continuously of capital construction, electricity needs sharply increases, and power cable with cross-linked polyethylene insulation product consumption also significantly increases year by year.But Electrical Tree Aging of XLPE Insulation degree is subject to tree discharge, it is the impact of water tree and electricity tree, thereby also affect its useful life, reducing insulation moisture is one of method improving power cable with cross-linked polyethylene insulation useful life, particularly along with the raising of electric pressure, cable block-water performance is also just more and more important, along with people are to cable insulation water suction and the research of water tree and the intensification of understanding, people more and more recognize the importance of water resistance to medium-pressure power cable, in level of ground water higher or long-term area of heavy rainfull (such as the Changjiang river areas to the south of China), increasing user has proposed the requirement of water resistant tree to cable.
Utility model content
The utility model object is for the existing deficiency of existing common cable technology, and a kind of waterproofing type water resistant tree medium-pressure power cable with excellent water resistance that can meet client's needs is provided.
The utility model comprises compenzine core, sets gradually inner restrictive coating, zinc-plated double-deck steel band armour and the high density polyethylene external sheath layer of stranding layer, the two-sided PE film composite aluminium plastic band water blocking layer of vertical bag, the formation of PE plastics in described compenzine core outside; The rubber filling layer that blocks water is set between described compenzine core and stranding layer; Per share described core comprise respectively by many soft copper silks and the regular stranded water-blocking conductor forming of the spun yarn that blocks water and between each layer of soft copper silk single line coating rubber, described water-blocking conductor press coefficient > 0.94; Extrude successively conductor shield, the crosslinked polyetylene insulated layer of water resistant tree and insulation screen in described water-blocking conductor outside by three-layer co-extruded technology; Set gradually semiconductive water blocking tape layer, copper strip shielding layer, waterstop lapping layer in described insulation screen outside.
In the utility model water resistant tree special type, press the design feature of cross-linked power cable to be:
When the utility model water-blocking conductor is stranded between each layer of single line coating rubber and between each layer of single line grafting water blocking yarn etc.Employing is pressed and is pulled out technique, and the coefficient that presses of conductor is reached more than 0.94, has reduced in conductor because introducing moisture with air, and conductor block-water effect is good, and processing is simple, easy to control.And do not affect mechanical and physical performance and the electric property of conductor.
The utility model polymeric barrier layer materials adopts the special procedure of high-purity refinement and micronization processes, develops ultra-smooth semiconductive shieldin material, has improved compactness and the water resistant molecule infiltration performance of the inside and outside semiconductive shielding layer of cable after extrusion molding.
The utility model water resistant tree type cross-linked polyethylene insulating material is by formations such as low density polyethylene (LDPE), water resistant tree additive ethylene-acrylic acid copolymer (EAA), crosslinking agent, assistant crosslinking agent, antioxidant.Water tree growth when this Insulation Material is moved cable has obvious inhibitory action, can effectively reduce the inner probability that forms water tree of insulating material.
The utility model rubber filling material is the rubber filling material that blocks water, conventional water repellent electric cable adopts waterproofing rope (yarn) to fill, for heavy in section multicore cable, owing to becoming, cable core gap is larger, while filling by waterproofing rope (yarn), because having little time imbibition, waterproofing rope makes to block water unsuccessfully sometimes.For this reason, we adopt that a kind of technique is simple, easy construction, dependable performance and the relatively low rubber that blocks water of cost is as packing material, in the time of stranding, with rubber extruding machine, rubber is clamp-oned in cable core gap, utilized the good contact of rubber and cable core can play resistance effect.
The utility model radially waterproof has adopted vertical bag aluminum plastic belt, because aluminium-plastic tape is two-sided PE film composite aluminium plastic band, in the time extruding polyethylene inner sheath, melt at polyethylene under the effect of height moderate pressure, the polyethylene film of plastic-aluminum combined belt surface and the inner surface of pe sheath are bondd well, and putting up between aluminum plastic composite belt longitudinal bag also obtains good bonding simultaneously.Thereby stop up the approach of moisture (gas) infiltration cable completely.Simultaneously the wrapped semiconductive zone of swelling that blocks water respectively in insulation shielding and metal screen layer outside, has reached good block-water effect.
The utility model armour is zinc-plated double-deck steel band, makes cable obtain effective mechanical protection, can bear radial pressure, meets the requirement of cable environment for use.
The utility model oversheath adopts high density polyethylene material to extrude, the waterproof of material own, and antiseptic property is good, easily processing, material is easy to get, and has reduced manufacturing cost.
The utility model structure innovation, material novelty, adopts three-layer co-extruded technology and longitudinal radial water-resisting technology, make cable there is excellent blocking water and water tree resistant property, high electrical performance, improve stability and the fail safe of medium-pressure electricity supply circuit, extended cable useful life, reduced power supply cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises compenzine core 1, sets gradually inner restrictive coating 4, zinc-plated double-deck steel band armour 5 and the high density polyethylene external sheath layer 6 of stranding layer 2, the two-sided PE film composite aluminium plastic band water blocking layer 3 of vertical bag, the formation of PE plastics in compenzine core 1 outside; The rubber filling layer 7 that blocks water is set between compenzine core 1 and stranding layer 2; Per share core 1 comprise respectively by many soft copper silks 8 and the spun yarn 9 that blocks water regular stranded form water-blocking conductor 10 and between the single line of each layer of soft copper silk 8 coating rubber, water-blocking conductor 10 press coefficient > 0.94; Extrude successively conductor shield 11, the crosslinked polyetylene insulated layer 12 of water resistant tree and insulation screen 13 in water-blocking conductor 10 outsides by three-layer co-extruded technology; Set gradually semiconductive water blocking tape layer 14, copper strip shielding layer 15 and waterstop lapping layer 16 in insulation screen 13 outsides.
Claims (1)
1. waterproofing type water resistant tree medium-pressure power cable, it is characterized in that: comprise compenzine core, set gradually inner restrictive coating, zinc-plated double-deck steel band armour and the high density polyethylene external sheath layer of stranding layer, the two-sided PE film composite aluminium plastic band water blocking layer of vertical bag, the formation of PE plastics in described compenzine core outside; The rubber filling layer that blocks water is set between described compenzine core and stranding layer; Per share described core comprise respectively by many soft copper silks and the spun yarn that blocks water regular stranded form water-blocking conductor and between each layer of soft copper silk single line coating rubber, described water-blocking conductor press coefficient > 0.94; Extrude successively conductor shield, the crosslinked polyetylene insulated layer of water resistant tree and insulation screen in described water-blocking conductor outside by three-layer co-extruded technology; Set gradually semiconductive water blocking tape layer, copper strip shielding layer, waterstop lapping layer in described insulation screen outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071344.7U CN203706729U (en) | 2014-02-19 | 2014-02-19 | Water blocking water-tree-resistant medium-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071344.7U CN203706729U (en) | 2014-02-19 | 2014-02-19 | Water blocking water-tree-resistant medium-voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203706729U true CN203706729U (en) | 2014-07-09 |
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ID=51057132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420071344.7U Expired - Fee Related CN203706729U (en) | 2014-02-19 | 2014-02-19 | Water blocking water-tree-resistant medium-voltage power cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN203706729U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167248A (en) * | 2014-09-10 | 2014-11-26 | 中天科技海缆有限公司 | Environment-friendly water-tree-resistant waterproof medium-voltage power cable |
| CN104637623A (en) * | 2015-02-03 | 2015-05-20 | 内蒙古仁达特种电缆有限公司 | Watertight power cable and processing technology thereof |
| CN106328271A (en) * | 2016-10-12 | 2017-01-11 | 无锡市长城电线电缆有限公司 | Termite-proof rat-proof water-blocked airport guiding lamp cable |
| CN107068257A (en) * | 2017-05-27 | 2017-08-18 | 江苏双登电力科技有限公司 | Photoelectricity composite water-proof and water repellent electric cable |
| CN108550421A (en) * | 2018-06-25 | 2018-09-18 | 江苏东峰电缆有限公司 | A kind of crosslinked polyetylene insulated pvc sheath radial water-resisting power cable |
| CN108847308A (en) * | 2018-06-20 | 2018-11-20 | 台州学院 | A kind of crosslinked polyetylene insulated pvc sheath cable and its preparation process |
| CN109273161A (en) * | 2018-09-07 | 2019-01-25 | 河南讯达电缆有限公司 | Double buried cables that block water |
-
2014
- 2014-02-19 CN CN201420071344.7U patent/CN203706729U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167248A (en) * | 2014-09-10 | 2014-11-26 | 中天科技海缆有限公司 | Environment-friendly water-tree-resistant waterproof medium-voltage power cable |
| CN104637623A (en) * | 2015-02-03 | 2015-05-20 | 内蒙古仁达特种电缆有限公司 | Watertight power cable and processing technology thereof |
| CN106328271A (en) * | 2016-10-12 | 2017-01-11 | 无锡市长城电线电缆有限公司 | Termite-proof rat-proof water-blocked airport guiding lamp cable |
| CN107068257A (en) * | 2017-05-27 | 2017-08-18 | 江苏双登电力科技有限公司 | Photoelectricity composite water-proof and water repellent electric cable |
| CN108847308A (en) * | 2018-06-20 | 2018-11-20 | 台州学院 | A kind of crosslinked polyetylene insulated pvc sheath cable and its preparation process |
| CN108550421A (en) * | 2018-06-25 | 2018-09-18 | 江苏东峰电缆有限公司 | A kind of crosslinked polyetylene insulated pvc sheath radial water-resisting power cable |
| CN109273161A (en) * | 2018-09-07 | 2019-01-25 | 河南讯达电缆有限公司 | Double buried cables that block water |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20200219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |