CN210896740U - 450/750V shielded flame-retardant fire-resistant B1-level cable for computer - Google Patents

Abstract

The utility model relates to a fire-retardant fire-resistant B1 level cable of 450/750V shielded type for computer, including conductor, flame retardant coating, insulating layer, branch shielding layer, first around covering, profile of tooth cover, isolation layer, second around covering, total shielding layer and oversheath layer, the conductor outward in proper order the cladding have flame retardant coating and insulating layer, conductor, flame retardant coating and insulating layer form first unit jointly, and the combination outside winding of per two first units has branch shielding layer, conductor, flame retardant coating, insulating layer, branch shielding layer form the second unit jointly, first outside at a plurality of second units around the covering, profile of tooth cover, isolation layer, second around covering, total shielding layer and oversheath layer from inside to outside in proper order the cladding first outside around the covering. Compared with the prior art, the utility model discloses the cable is improved from the structure, can satisfy current latest flame retardant properties 750 and give other heat 100min under the 850 ℃, and carbonization height 0.75m, fire resistance satisfy 180 min's high performance under the 950 ℃.

Description

450/750V shielded flame-retardant fire-resistant B1-level cable for computer

Technical Field

The utility model relates to a cable especially relates to a fire-retardant fire-resistant B1 level cable of 450/750V shielded type for computer.

Background

With the rapid development of market buildings, the use amount of small cables is more and more extensive, in the electrical control process, the requirements on the flame retardant and fire resistant performance of cable materials are more and more strict, the cable must meet the B1 performance under the standard condition, most of the existing computer cables still adopt halogen-containing sheaths, and once a fire disaster occurs, the cable of the type cannot meet the current standard requirements. And the flame retardant and fire resistant performance of the current B1 grade on a small-sized cable is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a 450/750V shielded flame-retardant fire-resistant B1 level cable for computer to satisfy the fire-retardant and fire resistance performance requirement of B1 level.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a fire-retardant fire-resistant B1 level cable of 450/750V shielded type for computer, includes conductor, flame retardant coating, insulating layer, divides the shielding layer, first around covering, profile of tooth cover, isolation layer, second around covering, total shielding layer and oversheath layer, the conductor outward in proper order the cladding have flame retardant coating and insulating layer, conductor, flame retardant coating and insulating layer form first unit jointly, and the winding of the combination outside of per two first units has the branch shielding layer, conductor, flame retardant coating, insulating layer, branch shielding layer form the second unit jointly, first around the covering around the outside of covering at a plurality of second units, profile of tooth cover, isolation layer, second are around covering, total shielding layer and oversheath layer from inside to outside in proper order the first outside around the covering.

Preferably, the conductor is a copper conductor, preferably a copper material in Jiangxi copper industry.

Preferably, the fire-resistant layer is made of a tri-and-one mica tape or a compound mica tape, preferably a tri-and-one mica tape or a compound mica tape of Jiangsu Zhongkun materials GmbH.

Preferably, the insulating layer is made of halogen-free low-smoke polyethylene insulating material.

Preferably, the sub-shielding layer is formed by weaving copper wire woven belts, the thickness of the sub-shielding layer is 0.5-1.0mm, and the weaving density of the sub-shielding layer is not less than 60%. Preferably made of copper wire of Zhejiang gold bridge copper industry. The weaving density meets the requirements of TICW06-2009 specifications.

Preferably, the partial shielding layer is formed by longitudinal covering, the production speed of the longitudinal covering mode is 1 minute and 30m, and the speed of a traditional knitting machine is 1 minute and 10 m, so the production efficiency is improved by adopting the longitudinal covering mode to replace the traditional knitting.

Preferably, the first wrapping layer and the second wrapping layer are formed by overlapping and wrapping polyester tapes, and the wrapping overlapping rate is not less than 15%.

Preferably, the tooth profile height of the tooth-shaped sleeve is 1.5-1.7mm, and the number of teeth is 6.

Preferably, the tooth-shaped isolation sleeve is made of low-smoke halogen-free polyolefin material, preferably halogen-free polyolefin material of Zhejiang Linhai east Sudoku Cable materials Co. The main aim is that the degree of shaping is good, has certain hardness, and the dish process in can make the cable guarantee the roundness, because of divide the shielding layer to be the heat conductor under high temperature 950 ℃ of flame, so extrude the fire-retardant profile of tooth cover of one deck halogen-free low smoke after the cable core stranding, have better fire behavior and stability simultaneously.

Preferably, the isolation layer is extruded on the outer layer of the tooth-shaped sleeve, and the thickness of the isolation layer is 2.0 mm.

The isolation layer can resist the temperature of 1200 ℃ for 180 min. The isolation layer expands when encountering fire at 130-260 ℃ to release certain crystal water to quickly reduce the combustion temperature of the cable, and can also isolate peripheral air generated by the combustion of the cable, so that the flame source of the B1-level cable sheath can not be combusted along two sides during the integral combustion.

Preferably, the total shielding layer is formed by weaving a copper wire woven belt, the total shielding layer is 0.5-1.0mm in thickness, the weaving density of the total shielding layer is not less than 60%, and the total shielding layer is formed in a longitudinal covering mode.

The total shielding is placed on the outer layer of the isolation layer to play a role of bidirectional protection, and can meet the standard requirements of GB/T31247 and BS 6387.

Preferably, the outer sheath layer is made of a B1-grade halogen-free low-smoke flame-retardant sheath material. Preferably, a B1 grade halogen-free low-smoke flame-retardant sheath material of Zhejiang Linhai Asia east materials Co.

The index performance of the outer sheath layer is as follows: the test items such as total heat value, smoke toxicity, heat release speed, heat release total amount, smoke production speed, combustion growth rate index, combustion dripping/particle, smoke density, corrosivity and the like meet the standard requirements of GB31247-2014, the flame retardant time can be prolonged by 90-100min, and the flame temperature is 850 ℃.

The fire resistance also meets three assessment of BS 6387-2013C W Z:

the flame does not break down under the flame of 3h at the temperature of 1C 950 ℃;

spraying water at 2W 650 deg.C for 30min for 15min (or soaking directly);

the flame is subjected to knocking vibration for 15min at the temperature of 3Z 950 ℃ without damage;

compared with the prior art, the utility model discloses the main advantage of cable embodies in following aspect:

1) the production speed is improved: the scheme adopts a copper wire woven belt to adopt a longitudinal wrapping mode to replace weaving equipment, and the production speed of the longitudinal wrapping mode is 1 minute and 30 m. The braiding machine speed is 1 minute and 10 meters. The weaving density meets the requirements of TICW06-2009 specifications.

2) Because the copper braided layer is a heat conductor under high-temperature 950 ℃ flame, the scheme extrudes a layer of halogen-free low-smoke flame-retardant tooth-shaped sleeve after the cable core is cabled, 6 teeth are designed, the height of the tooth shape is 1.5-1.7mm, an isolation layer is extruded, the total shielding is placed on the outer layer of the isolation layer to play a role in bidirectional protection, and the requirements of GB/T31247 and BS6387 standards can be met.

The utility model discloses the cable is improved from structural, can satisfy current newest fire behaviour 750-.

Drawings

Fig. 1 is a schematic structural diagram of an 450/750V shielded flame-retardant fire-resistant B1-grade cable for computers in example 1.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

An 450/750V shielded flame-retardant fire-resistant B1-level cable for a computer, as shown in figure 1, comprises a conductor 1, a flame-retardant layer 2, an insulating layer 3, a sub-shielding layer 4, a first wrapping layer 5, a tooth-shaped sleeve 6, an isolating layer 7, a second wrapping layer 8, a total shielding layer 9 and an outer sheath layer 10, the conductor 1 is sequentially coated with a fire-resistant layer 2 and an insulating layer 3, the conductor 1, the fire-resistant layer 2 and the insulating layer 3 form a first unit together, the combined outer side of every two first units is wound with a sub-shielding layer 4, the conductor 1, the fire-resistant layer 2, the insulating layer 3 and the sub-shielding layer 4 together form a second unit, the first wrapping layer 5 is wrapped on the outer sides of the plurality of second units, tooth form cover 6, isolation layer 7, second are around covering 8, total shielding layer 9 and oversheath layer 10 cladding in proper order from inside to outside first around the outside of covering 5.

In this embodiment, the conductor is made of copper material in Jiangxi copper industry. The fire-resistant layer 2 adopts three and one mica tapes or a composite mica tape of Jiangsu Zhongkung material company Limited. The insulating layer 3 is made of halogen-free low-smoke polyethylene insulating material. The sub-shielding layer 4 is formed by weaving copper wire braided straps, the thickness of the sub-shielding layer 4 is 0.5-1.0mm, the weaving density of the sub-shielding layer 4 is not less than 60%, and the sub-shielding layer is made of copper wires in the Zhejiang gold bridge copper industry. The weaving density meets the requirements of TICW06-2009 specifications. The sub-shielding layer 4 is formed by adopting a longitudinal cladding mode, the production speed of the longitudinal cladding mode is 1 minute and 30m, and the speed of a traditional knitting machine is 1 minute and 10 m, so that the production efficiency is improved by adopting a longitudinal cladding mode to replace the traditional knitting. First 5 around covering and second 8 around covering all adopt the polyester tape overlap around the package to form, overlap rate not less than 15% around the package. The tooth profile height of the tooth-shaped sleeve 6 is 1.5-1.7mm, and the number of teeth is 6. The tooth-shaped isolation sleeve is made of halogen-free polyolefin material of Zhejiang Linhai Asia east cable material Co. The main purpose is that the degree of shaping is good, has certain hardness, and the dish in-process can make the cable guarantee the roundness, because of divide shielding layer 4 to be the heat conductor under high temperature 950 ℃ of flame, so extrude the fire-retardant profile of tooth cover of one deck halogen-free low smoke after the cable core stranding, has better fire behavior and stability simultaneously. The isolating layer 7 is extruded out of the outer layer of the tooth-shaped sleeve 6, and the thickness of the isolating layer is 2.0 mm. The isolation layer 7 can resist the temperature of 1200 ℃ for 180 min. The isolation layer expands when encountering fire at 130-260 ℃ to release certain crystal water to quickly reduce the combustion temperature of the cable, and can also isolate peripheral air generated by the combustion of the cable, so that the flame source of the B1-level cable sheath can not be combusted along two sides during the integral combustion. The total shielding layer 9 is formed by weaving copper wire woven belts, the thickness of the total shielding layer 9 is 0.5-1.0mm, the weaving density of the total shielding layer 9 is not less than 60%, and the total shielding layer 9 is formed in a longitudinal cladding mode. The outer sheath layer 10 is made of a B1 grade halogen-free low-smoke flame-retardant sheath material of Zhejiang Linhai Yadong materials Co.

The computer obtained in the embodiment is tested by using 450/750V shielded flame-retardant fire-resistant B1-grade cable under the test condition of 950 ℃ for 180min, and the test result is as follows: when the flame is supplied, impact is applied, the flame temperature is not lower than 950 ℃, the voltage is applied to 1kV, and the 2A melting point device is not fused.

The computer obtained in the embodiment is tested by using 450/750V shielded flame-retardant fire-resistant B1-grade cable under the test condition of 850 ℃ for 95min, and the test result is as follows: and the carbonization height of the cable in the vertical combustion test is 0.75m, and the judgment result is qualified.

The index test data of the outer jacket layer of the present example is shown in table 1.

Table 1 index test data of the outer jacket layer of the embodiment

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims (8)

1. The utility model provides a 450/750V shielded flame-retardant fire-resistant B1 level cable for computer, its characterized in that, including conductor (1), flame retardant coating (2), insulating layer (3), divide shielding layer (4), first wind covering (5), profile of tooth cover (6), isolation layer (7), second around covering (8), total shielding layer (9) and oversheath layer (10), the outer cladding has flame retardant coating (2) and insulating layer (3) in proper order of conductor (1), flame retardant coating (2) and insulating layer (3) form first unit jointly, and the combination outside winding of per two first units has branch shielding layer (4), conductor (1), flame retardant coating (2), insulating layer (3), branch shielding layer (4) form the second unit jointly, first wind covering in the outside of a plurality of second units around covering (5), profile of tooth cover (6), Isolation layer (7), second are around covering (8), total shield layer (9) and oversheath layer (10) cladding in proper order from inside to outside first outside around covering (5).

2. The 450/750V shielding type flame-retardant and fire-resistant B1-grade cable for the computer as claimed in claim 1, wherein the partial shielding layer (4) is braided by copper wire braided tapes, the thickness of the partial shielding layer (4) is 0.5-1.0mm, and the braiding density of the partial shielding layer (4) is not less than 60%.

3. The 450/750V-shielded flame-retardant and fire-resistant cable of grade B1 for computer use as claimed in claim 1, wherein the partial shielding layer (4) is formed by longitudinal cladding.

4. The 450/750V shielded flame-retardant fire-resistant B1-grade cable for the computer, as claimed in claim 1, wherein the first wrapping layer (5) and the second wrapping layer (8) are both formed by overlapping and wrapping polyester tapes, and the overlapping rate of the wrapping tapes is not less than 15%.

5. The 450/750V shielded flame-retardant fire-resistant B1-class cable for computers as claimed in claim 1, wherein the tooth-shaped sheath (6) has a tooth-shaped height of 1.5-1.7mm and the number of teeth is 6 teeth.

6. An 450/750V shielded flame-retardant fire-resistant B1-class cable for computers as claimed in claim 1, wherein the insulating layer (7) is extruded on the outer layer of the tooth sheath (6) to a thickness of 2.0 mm.

7. The 450/750V shielding type flame-retardant and fire-resistant B1-grade cable for the computer, according to claim 1, wherein the total shielding layer (9) is woven by copper wire braided belts, the thickness of the total shielding layer (9) is 0.5-1.0mm, the weaving density of the total shielding layer (9) is not less than 60%, and the total shielding layer (9) is formed in a longitudinal covering mode.

8. The 450/750V shielded flame-retardant fire-resistant B1-class cable for the computer as claimed in claim 1, wherein the B1-class halogen-free low-smoke flame-retardant sheathing compound is adopted as the sheathing layer (10).

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