CN212782841U - Flame-retardant B1-grade fireproof single-core power cable with corrugated metal sheath - Google Patents
Flame-retardant B1-grade fireproof single-core power cable with corrugated metal sheath Download PDFInfo
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- CN212782841U CN212782841U CN202021664473.9U CN202021664473U CN212782841U CN 212782841 U CN212782841 U CN 212782841U CN 202021664473 U CN202021664473 U CN 202021664473U CN 212782841 U CN212782841 U CN 212782841U
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Abstract
The utility model discloses a fire-retardant B1 level fire-resistant type of ripple metallic sheath single core power cable contains soft copper conductor, insulating layer, ripple metallic sheath layer, separates oxygen layer, flame retardant coating and oversheath, and insulating layer, ripple metallic sheath layer, separate oxygen layer, flame retardant coating and oversheath set gradually in the outside of soft copper conductor from inside to outside. The utility model discloses a fire-retardant structure of dual fire-resistant + two sheaths carries out fire-retardant fire-resistant simultaneously from the cable is inside and outside, and the flame that flame produced when effective control cable burning stretches, heat releases indexes such as total amount, burning rate index, smoke density, toxicity index, and fire behavior when the conflagration takes place makes safe and reliable when the cable runs for a long time.
Description
Technical Field
The utility model relates to a single core power cable, especially a fire-retardant B1 level fire-resistant type single core power cable of ripple metallic sheath belongs to the power cable field.
Background
The fireproof single-core power cable with the rated voltage of 6-35 kV is mainly used in a power transmission and distribution line with the rated voltage of 6-35 kV and used as power transmission energy; current 6 ~ 35kV of rated voltage fire-resistant single core power cable, most fire-resistant band are around the package and add fire-retardant oversheath structure, need or not exactly that fire behavior is poor, need or not the fire behavior not to close, under the outside high temperature condition, can't last circular telegram or produce a large amount of toxic gas and smog when the burning, bring the hidden danger for people's life and property safety when the conflagration. Due to the special environment of using the fire-resistant single-core power cable with the rated voltage of 6-35 kV, particularly in airport terminal buildings, subways and high-rise buildings, the fire-resistant and flame-retardant effects of the cable are more important, and at present, various manufacturers continuously explore and research more effective solutions or more superior product structures and can not achieve the expected effect all the time. The fire-resistant single-core power cable with the rated voltage of 6-35 kV has higher and higher requirements on fire resistance and environmental protection, the problem is solved to become a key, the environment-friendly material is used and replaced, and for fire-resistant B1 combustion tests, the design structure of the cable and the use of the excellent fire-resistant material are optimized, so that the fire resistance and the fire resistance of the cable can be improved. Because the outer diameter is large, the flame retardant B1 combustion test has certain difficulty, if the flame retardant in the flame retardant material is added too much, the mechanical performance index of the material is necessarily greatly reduced, and the mechanical performance after aging is difficult to be qualified, so that the cable can crack in the bending stress process, the sheath can age obviously in the operation process, and the service life of the cable is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a single core power cable of fire-retardant B1 level fire-resistant type of ripple metallic sheath is provided, fire behavior is excellent and have good bend radius.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a fire-retardant type single core power cable of B1 level of ripple metallic sheath which characterized in that: the flexible copper conductor comprises a flexible copper conductor, an insulating layer, a corrugated metal sheath layer, an oxygen isolation layer, a fire-resistant layer and an outer sheath, wherein the insulating layer, the corrugated metal sheath layer, the oxygen isolation layer, the fire-resistant layer and the outer sheath are sequentially arranged on the outer side of the flexible copper conductor from inside to outside.
Further, a semi-conductive conductor shield is arranged between the soft copper conductor and the insulating layer.
Further, the insulating layer is made of a cross-linked polyethylene insulating material.
Further, a semi-conductive insulation shield is arranged outside the insulation layer.
Further, a semi-conductive wrapping layer is arranged on the outer side of the semi-conductive insulation shield.
Furthermore, the oxygen insulation layer is made of a low-smoke halogen-free flame-retardant oxygen insulation material.
Furthermore, the fire-resistant layer is made of ceramic polyolefin material or ceramic silicon rubber material.
Further, the outer sheath is made of low-smoke halogen-free flame-retardant materials.
Further, ripple metal sheathing layer and separate to be provided with first glass fiber tape between the oxygen layer around the covering, separate to be provided with second glass fiber tape around the covering between oxygen layer and the flame retardant coating, set up third glass fiber tape around the covering between flame retardant coating and the oversheath.
Furthermore, a first ceramic fire-resistant belt winding covering layer is arranged between the corrugated metal sheath layer and the oxygen isolation layer, a second ceramic fire-resistant belt winding covering layer is arranged between the oxygen isolation layer and the fire-resistant layer, and a third ceramic fire-resistant belt winding covering layer is arranged between the fire-resistant layer and the outer sheath.
Compared with the prior art, the utility model, have following advantage and effect: the utility model adopts the corrugated metal sheath and the extruded ceramic polyolefin fire-resistant layer, which can play a role of double fire-proof effect, improve the fire-proof performance of the cable body, and effectively improve the fire-proof performance of the cable by the oxygen-isolating layer and the low-smoke halogen-free fire-retardant polyolefin outer protection double sheath; the fireproof cable is characterized in that a super-strong fireproof structure is adopted, a corrugated metal sheath is used for preventing flame from entering an insulating ceramic polyolefin belt and crusting at high temperature, the grade of the fireproof cable can reach BS 6387:2013, the fireproof temperature is 950 ℃, power can be normally supplied for 180min, the conductor is a soft copper conductor, is insulated by cross-linked polyethylene, adopts a corrugated metal sheath, adopts a flame-retardant fireproof structure of a flame-retardant glass fiber wrapping layer, a low-smoke halogen-free flame-retardant oxygen isolation layer, a glass fiber wrapping layer, ceramic polyolefin, a glass fiber wrapping layer and a low-smoke halogen-free flame-retardant outer protective layer, and is convenient to construct and can be laid in various complex environments; the flame-retardant isolation layer and the low-smoke halogen-free flame-retardant B1 polyolefin sheath are adopted, so that the indexes such as heat release, flame spread, smoke density and the like during combustion are greatly reduced in flame-retardant performance, and therefore the flame-retardant B1-grade flame-retardant single-core power cable with the corrugated metal sheath can easily pass a flame-retardant B1 combustion test.
Drawings
Fig. 1 is a schematic diagram of a flame-retardant B1-grade refractory single-core power cable with a corrugated metal sheath according to the present invention.
Detailed Description
To elaborate on the technical solution adopted by the present invention for achieving the predetermined technical purpose, the technical solution in the embodiment of the present invention will be clearly and completely described below by combining with the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a partial embodiment of the present invention, not a whole embodiment, and technical means or technical features in the embodiment of the present invention can be replaced without paying creative efforts, and the present invention will be described in detail below by combining with the embodiments with reference to the drawings.
As shown in fig. 1, the utility model discloses a fire-retardant B1 level fire-resistant type single core power cable of ripple metallic sheath contains soft copper conductor 1, insulating layer 3, ripple metallic sheath layer 6, separates oxygen layer 8, flame retardant coating 10 and oversheath 12, and insulating layer 3, ripple metallic sheath layer 6, separate oxygen layer 8, flame retardant coating 10 and oversheath 12 set gradually in the outside of soft copper conductor 1 from inside to outside.
The soft copper conductor 1 mainly functions to transmit electric power. A semi-conductive conductor shield 2 is arranged between the soft copper conductor 1 and the insulating layer 3, and the semi-conductive conductor shield 2 mainly plays a role in balancing an electric field and has the same potential as the soft copper conductor 1, so that partial discharge between the soft copper conductor 1 and the insulating layer 3 is avoided. The insulating layer 3 is made of cross-linked polyethylene insulating material, so that current is prevented from diffusing outwards, the current is transmitted in one direction, and the conductor is protected from being corroded and damaged.
The outer side of the insulating layer 3 is provided with a semi-conductive insulating shield 4, the semi-conductive insulating shield 4 is mainly used for balancing the electric field and the electric potential of the corrugated metal sheath, and partial discharge between the insulating layer 3 and the corrugated metal sheath layer 6 is avoided. The semi-conductive is provided with around covering 5 in the outside of semi-conductive insulation shield 4, protects the insulation core in corrugated metal sheath layer production process. The corrugated metal sheath layer mainly plays a role in shielding an electric field and preventing flame from damaging insulation.
The oxygen isolation layer 8 is made of a low-smoke halogen-free flame-retardant oxygen isolation material, and the low-smoke halogen-free flame-retardant oxygen isolation layer has the function of isolating oxygen during combustion to provide a combustion improver, so that flame spread is effectively prevented. The fire-resistant layer 10 is made of ceramic polyolefin material or ceramic silicon rubber material, and mainly plays a fire-resistant role. The outer sheath 12 is made of low-smoke halogen-free flame-retardant material and mainly has the functions of environmental protection, flame retardance and cable protection.
A first glass fiber tape wrapping layer 7 is arranged between the corrugated metal sheath layer 6 and the oxygen isolation layer 8, a second glass fiber tape wrapping layer 9 is arranged between the oxygen isolation layer 8 and the fireproof layer 10, and a third glass fiber tape wrapping layer 11 is arranged between the fireproof layer 10 and the outer sheath 12. The three-layer glass fiber tape can enable the corrugated metal sheath layer 6, the oxygen isolation layer 8, the fire-resistant layer 10 and the outer sheath 12 to have a good isolation effect, has good mechanical performance, is convenient to construct and lay, and has a good flame-retardant effect.
A first ceramic fire-resistant belt winding covering layer is arranged between the corrugated metal sheath layer 6 and the oxygen isolation layer 8, a second ceramic fire-resistant belt winding covering layer is arranged between the oxygen isolation layer 8 and the fire-resistant layer 10, and a third ceramic fire-resistant belt winding covering layer is arranged between the fire-resistant layer 10 and the outer sheath 12. The three-layer ceramic fire-resistant belt is used as an alternative material of the glass fiber belt, and acts on the glass fiber belt uniformly.
The utility model discloses a fire-retardant B1 level fire-resistant type single core power cable of ripple metallic sheath adopts ripple metallic sheath and two fire prevention structures of ceramic polyolefin sheath to protect the driving for cable operation in the conflagration. The fireproof technology is added on the basis of the common fireproof power cable, the structure is more reasonable, the fireproof time is longer, the corrugated metal sheath layer and the ceramic polyolefin fireproof structure are used, the bending radius of the cable can not be improved when the cable encounters a fire disaster, the cable is laid and operated in multiple complex environments, the effective operation time of the cable is longer when the fire disaster occurs, the destructive power influenced by the fire disaster is smaller, and the cable is more stable in operation. With the increasing requirements of flame retardant grade and objective factors during fire, the former A, B, C flame retardant grade is not enough to meet the flame retardant requirements of special occasions, the flame retardant grade B1 is higher, and the requirements of the cable on the special occasions are greatly improved by index items such as flame spread, heat release, total heat release amount, burning rate index, smoke density, toxicity index and the like. The corrugated metal sheath layer is used, so that the high temperature resistance and the good sealing property of metal effectively prevent flame from damaging insulation; the ceramic polyolefin continuously burns at high temperature to form a ceramic knot shell layer, the highest temperature resistance can reach more than 1000 ℃, the oxygen isolation layer and the low-smoke halogen-free flame-retardant polyolefin double-protection-layer structure effectively prevent oxygen from continuously burning on the cable as a combustion improver, have good flame-retardant effect and protect the external mechanical property of the cable body.
The utility model discloses fire resistance is excellent, when outside temperature 950 ℃, still can last more than 180 minutes of working, and under the burning condition, does not produce toxic gas and a large amount of smog. The flame-retardant fireproof cable can be applied to special related places with higher fire-retardant flame-retardant grade, such as high-rise buildings, airport terminal buildings and subway stations, can improve the safe operation of circuits, can be used in metal processing, mines, railways and metallurgy industries in large scale, ensures the stable operation of the whole operation line, improves the power supply quality and prolongs the service life of equipment. The utility model discloses power cable's structure adopts dual fire-resistant + two sheath flame retardant construction, carries out fire-retardant fire-resistant simultaneously with the outside from the cable is inside, and the flame that flame produced when effective control cable burning stretches, heat releases indexes such as total amount, burning rate index, smoke density, toxicity index, and fire behavior when the conflagration takes place makes safe and reliable when the cable runs for a long time.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment without departing from the technical scope of the present invention, but all the modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principle of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a fire-retardant type single core power cable of B1 level of ripple metallic sheath which characterized in that: the flexible copper conductor comprises a flexible copper conductor, an insulating layer, a corrugated metal sheath layer, an oxygen isolation layer, a fire-resistant layer and an outer sheath, wherein the insulating layer, the corrugated metal sheath layer, the oxygen isolation layer, the fire-resistant layer and the outer sheath are sequentially arranged on the outer side of the flexible copper conductor from inside to outside.
2. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 1, wherein: and a semi-conductive conductor shield is arranged between the soft copper conductor and the insulating layer.
3. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 1, wherein: the insulating layer is made of a cross-linked polyethylene insulating material.
4. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 2, wherein: and a semi-conductive insulation shield is arranged outside the insulation layer.
5. A fire-resistant single-core power cable with a corrugated metal sheath and a fire-resistant grade B1 according to claim 4, wherein: and a semi-conductive wrapping layer is arranged on the outer side of the semi-conductive insulating shield.
6. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 1, wherein: the oxygen isolation layer is made of low-smoke halogen-free flame-retardant oxygen isolation materials.
7. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 1, wherein: the fire-resistant layer is made of ceramic polyolefin material or ceramic silicon rubber material.
8. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 1, wherein: the outer sheath is made of low-smoke halogen-free flame-retardant material.
9. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 1, wherein: corrugated metal sheath layer and separate to be provided with first glass fiber tape between the oxygen layer around the covering, separate to be provided with second glass fiber tape between oxygen layer and the flame retardant coating around the covering, set up third glass fiber tape around the covering between flame retardant coating and the oversheath.
10. A fire-resistant single-core power cable of corrugated metal sheath fire-retardant class B1 in accordance with claim 1, wherein: the corrugated metal sheath layer and the oxygen isolation layer are provided with a first ceramic fire-resistant belt winding layer therebetween, a second ceramic fire-resistant belt winding layer is arranged between the oxygen isolation layer and the fire-resistant layer, and a third ceramic fire-resistant belt winding layer is arranged between the fire-resistant layer and the outer sheath.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021664473.9U CN212782841U (en) | 2020-08-12 | 2020-08-12 | Flame-retardant B1-grade fireproof single-core power cable with corrugated metal sheath |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021664473.9U CN212782841U (en) | 2020-08-12 | 2020-08-12 | Flame-retardant B1-grade fireproof single-core power cable with corrugated metal sheath |
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| CN212782841U true CN212782841U (en) | 2021-03-23 |
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| CN202021664473.9U Active CN212782841U (en) | 2020-08-12 | 2020-08-12 | Flame-retardant B1-grade fireproof single-core power cable with corrugated metal sheath |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005590A (en) * | 2021-11-03 | 2022-02-01 | 安徽蒙特尔电缆集团有限公司 | Comprehensive protection B1-level cable for rail transit |
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- 2020-08-12 CN CN202021664473.9U patent/CN212782841U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005590A (en) * | 2021-11-03 | 2022-02-01 | 安徽蒙特尔电缆集团有限公司 | Comprehensive protection B1-level cable for rail transit |
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