CN205282161U

CN205282161U - High fire -retardant fire -resistant waterproof power cable

Info

Publication number: CN205282161U
Application number: CN201620019396.9U
Authority: CN
Inventors: 胡明新; 杜汉永; 胡忠繁
Original assignee: Zhejiang Cable Factory Of Pudong
Current assignee: Zhejiang Cable Factory Of Pudong
Priority date: 2016-01-08
Filing date: 2016-01-08
Publication date: 2016-06-01
Anticipated expiration: 2026-01-08

Abstract

The utility model provides a high fire -retardant fire -resistant waterproof power cable, includes five cable cores, every the equal ab intra of cable core outwards is equipped with electric conductor, PVC layer and dacron layer in proper order, five the skin of cable core is equipped with the polyurethane resin layer. At first because PVC itself just has low flammability, high strength, gasproof marquis variability and how much good stability. And it all has very strong resistance to oxidant, reductant and strong acid. So set up when electric conductor outer, protected the electric conductor to be corroded by the material in the external world promptly, again can because of the electric conductor under the condition that the electric current acting is generated heat and the emergence spontaneous combustion, therefore make the cable have very high fire -retardant ability and fire resistance. And the effect of buffering has mainly been played in the outside on PVC layer to the dacron setting, prevents that the electric conductor atress is too big and snaps.

Description

The fire-resistant waterproof power cable of high flame retardant

Technical field

The utility model relates to field of cables, particularly relates to the fire-resistant waterproof power cable of high flame retardant.

Background technology

Power cable is for transmitting and distribute the cable of electric energy. Be usually used in underground, city electrical network, the lead line in power house, the inside of industrial and mining enterprises powers and crosses the submarine transmission line in river, excessively sea. The Chinese patent " cable " being 201520164861.3 such as application number discloses a kind of cable, comprise some cables core, PP restricts packing layer, POLYESTER YARNS braid and oversheath, cable core comprises sheath in some conductors, colour band and polyolefine successively from inside to outside, is equipped with the bonding braid weaving by compound copper-plastics band and making between the conductor being in described cable core and colour band and between described POLYESTER YARNS braid and oversheath.

Although, practical novel by arranging bonding braid in cable core, this bonding braid serves the shield effectiveness between cable core well, and namely freedom from jamming raising decreases crosstalk; And identical bonding braid is also set between POLYESTER YARNS braid and oversheath, namely effectively increase anti-external disturbance performance.

But, owing to generally colour band is easily combustion, thus excessive it is possible to there is cable spontaneous combustion once the current power in cable. Further, due to cable likely can from crossing river, excessively extra large under water, so, oversheath is easily by river or sea-water corrosion, and then causes river or seawater to enter into cable inside, contacts with cable core, causes electric leakage phenomenon.

Practical novel content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of fire-resistant waterproof power cable of high flame retardant.

For achieving the above object, the utility model provides following technical scheme: a kind of fire-resistant waterproof power cable of high flame retardant, comprising five cables core, cable core described in every root is provided with electrical conductor, layer of PVC and terylene layer all from inside to outside successively, and the skin of five described cables core is provided with polyurethane resin layer.

The utility model has following advantage: first owing to PVC inherently has noninflammability, high strength, resistance to local gas holdup and excellent geometrical stability. And oxygenant, reductive agent and strong acid are had very strong resistibility by it. So when being arranged on electrical conductor outer, namely protecting electrical conductor and corroded by the material in the external world, spontaneous combustion can not be there is because of electrical conductor when electric current acting heating again, therefore make cable have very high fire retardancy and fire performance. And the outside that terylene is arranged on layer of PVC mainly serves the effect of buffering, prevents electrical conductor to be subject to power excessive and snap.

In addition, urethane resin has the ability of stronger uvioresistant, so it is not easily aging, and urethane resin inherently has the ability of waterproof, even if cable is long-term like this and water contacts, also it is not easy to make water enter into cable inside because of the aging breakage of urethane resin, thus serves the effect of effective waterproof.

As preferably, being provided with asbestos powder last layer between described urethane resin layer and terylene layer.

As preferably, the thickness of described asbestos powder last layer is the 1/3 of cable radius.

Asbestos itself have extremely fireproof, electrical insulating property and heat insulating ability, the heat sent from electrical conductor can be stopped therein by it as far as possible like this, so only less heat just can arrive polyurethane resin place, and then the temperature of urethane resin not easily raises, so greatly reducing urethane resin because the too high and aging possibility of temperature, even if terylene layer there occurs catch fire, asbestos can also stop fire and burn laterally, so namely asbestos are conducive to strengthening the fire performance of cable, again the waterproof of cable is served important booster action.

Simultaneously, the thickness of asbestos powder last layer is the half of cable radius, so namely, the size needed for cable normal operation can be ensured, urethane resin layer and layer of PVC can be completely cut off effectively again the effect of heat, thus further increase the flame-retardant of cable and the performance of waterproof.

As preferably, being provided with chloroprene rubber layer between described asbestos powder last layer and urethane resin layer.

Chloroprene rubber layer itself has good waterproof ability, if when urethane resin layer is subject to local mechanical loss like this, cable can also be played waterproof action by chloroprene rubber layer. Further, it also has ageing-resistant, heat-resisting, oil resistant, chemical resistance excellence and flame retardant resistance. So, cable through river, sea in, namely the accident that also easily cable failure can not occur and leak electricity, so facilitating the effect that layer of PVC also facilitates urethane resin layer.

As preferably, being provided with clorafin layer between described layer of PVC and terylene layer.

At the arranged outside clorafin layer of layer of PVC, clorafin has stronger fire-retardant and electrical insulating property and like this layer of PVC just serves further fire retardation, and its not easy conductive so the possibility of cable leakage can also be reduced.

Accompanying drawing explanation

Fig. 1 is the structural representation of power cable;

Fig. 2 is the structural representation of cable core.

In figure: 1, cable core; 2, India-rubber strip; 3, layer of PVC; 4, terylene layer; 5, asbestos powder last layer; 6, chloroprene rubber layer; 7, urethane resin layer; 8, clorafin layer.

Embodiment

Referring to figs. 1 through Fig. 2, embodiment of the present utility model is described further.

A kind of fire-resistant waterproof power cable of high flame retardant, comprise five cables core 1, the common geometric centre of five cables core 1 is provided with a root rubber bar 2, this India-rubber strip 2 serves the effect of skeleton, thus prevent cable when motion, fix unstable between cable core 1 and occur whole cable to be out of shape, cause arrangement between cable inner. layers chaotic and cause cable core 1 easily to damage. Meanwhile, every root cable core 1 is provided with electrical conductor 9, layer of PVC 3 and terylene layer 4 all from inside to outside successively, and electrical conductor 9 can determine material according to particular case, is made of copper herein. The common skin of five cables core 1 is provided with polyurethane resin layer.

Owing to PVC inherently has noninflammability, high strength, resistance to local gas holdup and excellent geometrical stability. And oxygenant, reductive agent and strong acid are had very strong resistibility by it. So when being arranged on electrical conductor 9 outer, namely protecting electrical conductor 9 and corroded by the material in the external world, spontaneous combustion can not be there is because of electrical conductor 9 when electric current acting heating again, therefore make cable have very high fire retardancy and fire performance. And the outside that terylene is arranged on layer of PVC 3 mainly serves the effect of buffering, prevent electrical conductor 9 excessive and snap by power.

Moreover, urethane resin has the ability of stronger uvioresistant, so aging speed compare slow, and itself just has the ability of waterproof, even if cable is long-term like this and water contacts, also it is not easy to make water enter into cable inside because of the aging breakage of urethane resin, thus serves the effect of effective waterproof.

In addition, asbestos powder last layer 5 it is provided with between urethane resin layer 7 and terylene layer 4, the thickness of asbestos powder last layer 5 is the 1/3 of the radius of cable, so on the one hand, asbestos powder last layer 5 itself has stronger resistivity against fire, electrical insulating property and heat insulating ability, the heat sent from electrical conductor 9 can be blocked in the inner side of asbestos powder last layer 5 by it as far as possible like this, so only less heat just can arrive polyurethane resin place, and then the temperature of urethane resin not easily raises, so greatly reducing urethane resin because the too high and aging possibility of temperature, even if terylene layer 4 there occurs catch fire, asbestos can also stop fire and burn laterally, so namely asbestos are conducive to strengthening the fire performance of cable, again the waterproof of cable is served important booster action.

And the thickness of asbestos powder last layer 5 is the half of cable radius, so namely, the size needed for cable normal operation can be ensured, urethane resin layer 7 and layer of PVC 3 can be completely cut off effectively again the effect of heat, thus further increase the flame-retardant of cable and the performance of waterproof.

Further is set to, one layer of chloroprene rubber layer 6 it is provided with again between asbestos powder last layer 5 and urethane resin layer 7, this is owing to chloroprene rubber layer 6 itself has good waterproof ability, if when urethane resin layer 7 is subject to local mechanical loss, cable can also be played waterproof action by chloroprene rubber layer 6. Further, it also has ageing-resistant, heat-resisting, oil resistant, chemical resistance excellence and flame retardant resistance. So, cable through river, sea in, the accident that also easily cable failure can not occur and leak electricity, so namely facilitating the effect that layer of PVC 3 also facilitates urethane resin layer 7, enhances the performance of the fire-resistant waterproof of cable.

Further scheme is, clorafin layer 8 it is provided with between layer of PVC 3 and terylene layer 4, clorafin layer 8 has clorafin and has stronger fire-retardant and electrical insulating property, which increase whole cable fire retardation and again not easy conductive so the possibility of cable leakage can also be reduced.

The above is only preferred implementation of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model. It is noted that for those skilled in the art, in the some improvements and modifications not departed under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. the fire-resistant waterproof power cable of high flame retardant, comprise five cables core, it is characterized in that: cable core (1) described in every root is provided with electrical conductor (9), layer of PVC (3) and terylene layer (4) all from inside to outside successively, and the skin of five described cables core (1) is provided with polyurethane resin layer (7).

2. the fire-resistant waterproof power cable of high flame retardant according to claim 1, it is characterised in that: it is provided with asbestos powder last layer between described urethane resin layer (7) and terylene layer (4).

3. the fire-resistant waterproof power cable of high flame retardant according to claim 2, its feature exists: the thickness of described asbestos powder last layer (5) is the 1/3 of cable radius.

4. the fire-resistant waterproof power cable of high flame retardant according to claim 2, it is characterised in that: it is provided with chloroprene rubber layer (6) between described asbestos powder last layer (5) and urethane resin layer (7).

5. the fire-resistant waterproof power cable of high flame retardant according to claim 1, it is characterised in that: it is provided with clorafin layer (8) between described layer of PVC (3) and terylene layer (4).