CN102820089A - Medium voltage fire resisting cable - Google Patents
Medium voltage fire resisting cable Download PDFInfo
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- CN102820089A CN102820089A CN 201110154716 CN201110154716A CN102820089A CN 102820089 A CN102820089 A CN 102820089A CN 201110154716 CN201110154716 CN 201110154716 CN 201110154716 A CN201110154716 A CN 201110154716A CN 102820089 A CN102820089 A CN 102820089A
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Abstract
The invention discloses a medium voltage fire resisting cable, belongs to the technical field of power cables and aims to supply the medium voltage fire resisting cable which is not prone to damage and good in fire resistance in an aerobic and high temperature combustion environment. The technical scheme includes that the cable comprises a conductor (1), a conductor shielding layer (2), an insulating layer (3) and an insulating shielding layer (4) are sequentially formed on the conductor in an extrusion wrapping mode, a metal shielding layer (5), a thermal protective layer (9), a fire resisting layer and an outer sheath (13) are sequentially arranged on the exterior of the insulating shielding layer (4), and the fire resisting layer is formed by combining an inner fire resisting layer (10) made of a ceramic silicon rubber and an outer fire resisting layer (11) made of an incrustation type polyolefin. According to the technical scheme, the technical problems that similar ceramic solid fire resisting thermal protective layer is prone to damage in the aerobic and high temperature combustion environment and the protection for internal cables is insufficient are solved, and the fire resistance of the medium voltage fire resisting cable is improved.
Description
Technical field
The present invention relates to a kind of power cable, particularly a kind of middle fire-resisting cable of pressing belongs to the power cable technical field.
Background technology
Along with development of Chinese economy, the voltage of incity, city electric power system raises gradually.If high-rise, super-huge high-rise adopts the 0.6/1kV low-voltage distribution, its cable consumption and workload are huge.For solving an actual power supply difficult problem, buildings such as high-rise, super-huge high level begin to adopt medium-pressure electricity supply (6kV～35kV).The main performance that its centering presses service cable to require: under combustion case, can guarantee a period of time ground normal power supply.
Chinese patent CN101236801A discloses a kind of fire-resisting cable, and it coats the refractory insulating layer of 0.05mm～1.00mm silica compound formation and the external protection that the refractory fibre braid constitutes outside conductor.It is fire-resistant that it is suitable for low pressure.
Disclosed 6kV of Chinese patent CN1480958 and above middle compression swelling type fire-resisting cable, the insulated wire cores appearance is provided with separation sleeve, and the separation sleeve appearance is filled with the mineral matter composite bed, and the mineral matter composite bed is provided with expansion sleeve outward, and expansion sleeve is outward a sheath.Its oversheath is under the situation of burning, and the mineral matter refractory insulating layer is fragile.
Press fire-resisting cable during Chinese patent 101169993B is open, it is at the insulated wire cores peripheral hardware flame retardant coating and the oversheath of middle laminated structure.Flame retardant coating be inboard refractory inorganic fiber thermal insulation layer and outside soft type thermo-setting elastomer promptly: potteryization silicon rubber.Soft type thermo-setting elastomer promptly outside it: the organic matter of potteryization silicon rubber and moisture burn mistake can become similar ceramic-like solid refractory insulating layer.Its similar ceramic-like solid refractory insulating layer is not enough to the cable internal protection under the aerobic burning situation.
Summary of the invention
The objective of the invention is the deficiency to prior art, provide a kind of can be not fragile under the burning situation of aerobic, high temperature, middle pressure fire-resisting cable that fire resistance is good.
For realizing above-mentioned technical purpose; The present invention adopts following technical scheme: press fire-resisting cable in a kind of; Comprise conductor; Extrude conductor shield, insulating barrier, insulation screen on the conductor successively; Insulation screen is provided with metal screen layer, thermal insulation layer, flame retardant coating, oversheath outward successively, and conductor, conductor shield, insulating barrier, insulation screen and metal screen layer constitute insulated wire cores, and said flame retardant coating is the combination flame retardant coating that is made up of the interior flame retardant coating of pottery silicon rubber and the polyolefinic outer flame retardant coating of crust type.
The potteryization silicone rubber formulations comprises silicon rubber, inorganic fillings, porcelain powder.That is: in silicon rubber, add inorganic fillings, porcelain powder material,, in mill, add vulcanizing agent, process mold pressing then, the product of extruding through after mixing.
Further, be provided with the low-smoke non-halogen flame-retardant band between said outer flame retardant coating and the oversheath.
Further, said insulated wire cores is one.
Further, said insulated wire cores is three, and three insulated cores and filler constitute cable core, and said thermal insulation layer is between cable core and interior flame retardant coating.
Further, said thermal insulation layer is the alkali-free glass fibre braid over braid.
Further, said filler is the filler that the alkali-free glass fibre material constitutes.
Further, said metal screen layer is the metal screen layer that the metal copper strips constitutes.
Further, said oversheath is the oversheath that polyolefine material constitutes.
After adopting technique scheme, the present invention has following beneficial effect:
(1) the interior flame retardant coating of potteryization silicon rubber changes the refractory heat-insulating structure of similar ceramic-like solid refractory heat-insulating cover into when meeting high temperature under burning condition.The polyolefinic outer flame retardant coating of crust type is met fire and is then crusted under burning condition, and the interior flame retardant coating of pottery silicon rubber is tightly wrapped up, and has the effect of oxygen barrier.Crust type polyolefin crust performance is good, and combination flame retardant coating, thermal insulation layer heat-proof quality are good.The combination flame retardant coating that constitutes by the interior flame retardant coating and the polyolefinic outer flame retardant coating of crust type of pottery silicon rubber; Effectively solving similar ceramic-like solid refractory insulating layer is to the not enough technical problem of cable internal protection under aerobic, the hot conditions in burning situation; Carry the fire resistance of high pressure fire-resisting cable; Under combustion case, can guarantee a period of time ground normal power supply.
(2) establish the low-smoke non-halogen flame-retardant band outside between flame retardant coating and the oversheath, further carry the low smoke and zero halogen fire resistance of high pressure fire-resisting cable.Under the acting in conjunction of combination flame retardant coating, low-smoke non-halogen flame-retardant band and oversheath, middle pressure fire-resisting cable reaches the fire-retardant requirement of category-A.
(3) insulated wire cores is one or three.When adopting three insulated cores, three insulated cores and filler constitute cable core, thermal insulation layer between cable core and interior flame retardant coating, its effect: the energising performance of one, carrying the high pressure fire-resisting cable; Two, the alkali-free glass fibre braid over braid improves performances such as fire-resistant, high temperature resistant, fire-retardant, thermal insulation, presses fire-resisting cable in making under burning condition, guarantees a period of time ground normal power supply; Three, three insulated cores are processed stranded convenience, reduce cost.
(4) filler adopts the alkali-free glass fibre material, and the preferred alkali-free glass fibre braid over braid of thermal insulation layer improves performances such as fire-resistant, high temperature resistant, fire-retardant, heat insulation, presses fire-resisting cable in making under burning condition, guarantees a period of time ground normal power supply.
(5) metal screen layer that adopts the metal copper strips to constitute is put forward the shielding properties of high pressure fire-resisting cable.
(6) long service life under the oversheath normal condition of employing polyolefine material formation, it is under the cable fire condition, and low cigarette, Halogen also improve fire resistance.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the structural representation of the embodiment of the invention two;
Fig. 3 is the structure enlarged drawing of parts 6 in Fig. 1 or 2.
Among the figure: 1. conductor, 2. conductor shield, 3. insulating barrier, 4. insulation screen, 5. metal screen layer, 6. insulated wire cores, 7. filler, 8. cable core, 9. thermal insulation layer, 10. in flame retardant coating, 11. outer flame retardant coatings, 12. low-smoke non-halogen flame-retardant bands, 13. oversheaths.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is done further detailed explanation.
Embodiment one
As shown in figures 1 and 3, middle pressure fire-resisting cable, there is a conductor 1 centre, and conductor 1 adopts copper conductor.Extrude conductor shield 2, insulating barrier 3, insulation screen 4 successively with the three layers of mode that extrudes outside the conductor 1.The insulation screen 4 outer metal screen layers 5, metal screen layer 5 preferred copper strips screens of being provided with.Conductor 1, conductor shield 2, insulating barrier 3, insulation screen 4 and metal screen layer 5 constitute insulated wire cores 6.Insulated wire cores 6 outer thermal insulation layer 9, combination flame retardant coating, low-smoke non-halogen flame-retardant band 12 and the oversheaths 13 of being provided with successively.Thermal insulation layer 9 preferred alkali-free glass fibre braid over braids.The combination flame retardant coating is made up of with the polyolefinic outer flame retardant coating 11 of crust type the interior flame retardant coating 10 of pottery silicon rubber.Oversheath 13 preferred polyolefm materials.
Thermal insulation layer 9 preferred alkali-free glass fibre braid over braids are put forward fire resistance, heat-resisting quantity, anti-flammability and the thermal insulation of high pressure fire-resisting cable.
The polyolefinic outer flame retardant coating 11 of crust type is met fire and is then crusted under burning condition, and the interior flame retardant coating 10 of pottery silicon rubber is tightly wrapped up, and reaches the effect of oxygen barrier.The interior flame retardant coating 10 of potteryization silicon rubber changes the refractory heat-insulating structure of similar ceramic-like solid refractory heat-insulating cover into when meeting high temperature under burning condition, reach fire-resistant, heat insulation effect.Crust type polyolefin fire resistance is good, and the heat-proof quality of potteryization silicon rubber and thermal insulation layer is good, presses the fire-resisting cable fire resistance good in making, and under combustion case, can guarantee a period of time ground normal power supply.
Under the acting in conjunction of combination flame retardant coating, low-smoke non-halogen flame-retardant band 12 and oversheath 13, middle pressure fire-resisting cable reaches the fire-retardant requirement of category-A.
Embodiment two
As shown in Figures 2 and 3, middle pressure fire-resisting cable, there are three conductors 1 centre, and conductor 1 adopts copper conductor.Extrude conductor shield 2, insulating barrier 3, insulation screen 4 successively with the three layers of mode that extrudes outside the conductor 1.The insulation screen 4 outer metal screen layers 5, metal screen layer 5 preferred copper strips screens of being provided with.Conductor 1, conductor shield 2, insulating barrier 3, insulation screen 4 and metal screen layer 5 constitute insulated wire cores 6.Three insulated cores 6 constitute cable core 8, filler 7 preferred alkali-free glass fibre materials with filler 7.Cable core 8 outer thermal insulation layer 9, combination flame retardant coating, low-smoke non-halogen flame-retardant band 12 and the oversheaths 13 of being provided with successively.Thermal insulation layer 9 preferred alkali-free glass fibre braid over braids.The combination flame retardant coating is made up of with the polyolefinic outer flame retardant coating 11 of crust type the interior flame retardant coating 10 of pottery silicon rubber.Oversheath 13 preferred polyolefm materials.
The polyolefinic outer flame retardant coating 11 of crust type is met fire and is then crusted under burning condition, and the interior flame retardant coating 10 of pottery silicon rubber is tightly wrapped up, and reaches the effect of oxygen barrier.The interior flame retardant coating 10 of potteryization silicon rubber changes the refractory heat-insulating structure of similar ceramic-like solid refractory heat-insulating cover into when meeting high temperature under burning condition, reach fire-resistant, heat insulation effect.Crust type polyolefin fire resistance is good, and the heat-proof quality of potteryization silicon rubber and thermal insulation layer is good, presses the fire-resisting cable fire resistance good in making, and under combustion case, can guarantee a period of time ground normal power supply.
Under the acting in conjunction of combination flame retardant coating, low-smoke non-halogen flame-retardant band 12 and oversheath 13, middle pressure fire-resisting cable reaches the fire-retardant requirement of category-A.
The invention is not restricted to the foregoing description, the technical scheme that all employings are equal to or equivalence replacement forms all belongs to the present invention and requires the scope protected.
Claims (8)
1. press fire-resisting cable in one kind; Comprise conductor (1); Extrude conductor shield (2), insulating barrier (3), insulation screen (4) on the conductor successively; Outer metal screen layer (5), thermal insulation layer (9), flame retardant coating, the oversheath (13) of being provided with successively of insulation screen (4); Conductor (1), conductor shield (2), insulating barrier (3), insulation screen (4) and metal screen layer (5) constitute insulated wire cores (6), it is characterized in that: said flame retardant coating is the combination flame retardant coating that is made up of the interior flame retardant coating (10) of pottery silicon rubber and the polyolefinic outer flame retardant coating of crust type (11).
2. press fire-resisting cable in according to claim 1, it is characterized in that: be provided with low-smoke non-halogen flame-retardant band (12) between said outer flame retardant coating (11) and the oversheath (13).
3. press fire-resisting cable in according to claim 2, it is characterized in that: said insulated wire cores (6) is one.
4. press fire-resisting cable in according to claim 2, it is characterized in that: said insulated wire cores (6) is three, and three insulated cores and filler (7) constitute cable core (8), and said thermal insulation layer (9) is positioned between cable core (8) and the flame retardant coating (10).
5. according to claim 3 or the 4 said middle fire-resisting cables of pressing, it is characterized in that: said thermal insulation layer (9) is the alkali-free glass fibre braid over braid.
6. according to claim 3 or the 4 said middle fire-resisting cables of pressing, it is characterized in that: said filler (7) is the filler that the alkali-free glass fibre material constitutes.
7. according to claim 3 or the 4 said middle fire-resisting cables of pressing, it is characterized in that: said metal screen layer (5) is the metal screen layer that the metal copper strips constitutes.
8. according to claim 3 or the 4 said middle fire-resisting cables of pressing, it is characterized in that: said oversheath (13) is the oversheath that polyolefine material constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110154716 CN102820089A (en) | 2011-06-10 | 2011-06-10 | Medium voltage fire resisting cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110154716 CN102820089A (en) | 2011-06-10 | 2011-06-10 | Medium voltage fire resisting cable |
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| CN102820089A true CN102820089A (en) | 2012-12-12 |
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| CN 201110154716 Pending CN102820089A (en) | 2011-06-10 | 2011-06-10 | Medium voltage fire resisting cable |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008799A (en) * | 2014-04-23 | 2014-08-27 | 晶锋集团股份有限公司 | Fireproof computer cable supported by framework |
| CN105679431A (en) * | 2015-10-15 | 2016-06-15 | 安徽双诚电线电缆有限公司 | Weather-proof type aluminium alloy overhead cable with composite resin sheath |
| CN105679445A (en) * | 2015-10-15 | 2016-06-15 | 安徽双诚电线电缆有限公司 | Cable with halogen-free flame-retardant polyolefin sheath |
| CN107293359A (en) * | 2017-06-28 | 2017-10-24 | 代卫东 | A kind of Novel lightning-proof Compression-resistincable cable |
| CN107293357A (en) * | 2017-06-28 | 2017-10-24 | 代卫东 | A kind of heat-resisting measuring body lightning protection control cable |
| CN109036682A (en) * | 2018-07-31 | 2018-12-18 | 特变电工山东鲁能泰山电缆有限公司 | A kind of insulating refractory low-smoke non-halogen flame-retardant midium voltage cable with air duct |
| CN110797146A (en) * | 2019-11-07 | 2020-02-14 | 苏州永鼎线缆科技有限公司 | Low-smoke flame-retardant safe communication cable |
| CN110993173A (en) * | 2019-12-02 | 2020-04-10 | 广州亚太线缆科技有限公司 | High-temperature cable with insulating silicone rubber sheath and preparation method thereof |
| CN111272320A (en) * | 2020-02-07 | 2020-06-12 | 云南电网有限责任公司电力科学研究院 | High-pressure gas circuit breaker spout transient pressure testing arrangement |
-
2011
- 2011-06-10 CN CN 201110154716 patent/CN102820089A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008799A (en) * | 2014-04-23 | 2014-08-27 | 晶锋集团股份有限公司 | Fireproof computer cable supported by framework |
| CN105679431A (en) * | 2015-10-15 | 2016-06-15 | 安徽双诚电线电缆有限公司 | Weather-proof type aluminium alloy overhead cable with composite resin sheath |
| CN105679445A (en) * | 2015-10-15 | 2016-06-15 | 安徽双诚电线电缆有限公司 | Cable with halogen-free flame-retardant polyolefin sheath |
| CN107293359A (en) * | 2017-06-28 | 2017-10-24 | 代卫东 | A kind of Novel lightning-proof Compression-resistincable cable |
| CN107293357A (en) * | 2017-06-28 | 2017-10-24 | 代卫东 | A kind of heat-resisting measuring body lightning protection control cable |
| CN109036682A (en) * | 2018-07-31 | 2018-12-18 | 特变电工山东鲁能泰山电缆有限公司 | A kind of insulating refractory low-smoke non-halogen flame-retardant midium voltage cable with air duct |
| CN110797146A (en) * | 2019-11-07 | 2020-02-14 | 苏州永鼎线缆科技有限公司 | Low-smoke flame-retardant safe communication cable |
| CN110993173A (en) * | 2019-12-02 | 2020-04-10 | 广州亚太线缆科技有限公司 | High-temperature cable with insulating silicone rubber sheath and preparation method thereof |
| CN111272320A (en) * | 2020-02-07 | 2020-06-12 | 云南电网有限责任公司电力科学研究院 | High-pressure gas circuit breaker spout transient pressure testing arrangement |
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Application publication date: 20121212 |