CN219123011U - Environment-friendly A-level flame-retardant fire-resistant control cable - Google Patents

Abstract

The utility model discloses an environment-friendly A-level flame-retardant fire-resistant control cable, which is characterized in that a conductor is formed by overlapping and wrapping a double-layer synthetic mica tape I, extruding and irradiating a low-smoke halogen-free flame-retardant cross-linked polyolefin insulating layer to form an insulating wire core, a plurality of insulating wire cores are twisted into a cable, a ceramic silicon rubber inner protective layer is extruded outside the cable core, a plurality of layers of synthetic mica tapes II are overlapped and wrapped outside the ceramic silicon rubber inner protective layer, then a copper wire woven shielding layer is wrapped, the copper wire woven shielding layer is wrapped outside the copper wire woven shielding layer by adopting a low-smoke halogen-free high flame-retardant tape, and an outer sheath is wrapped outside the low-smoke halogen-free high flame-retardant tape. The utility model has the characteristics of no halogen, low smoke, low halogen and low smoke, low spreading speed, low smoke concentration, high visibility, small release amount of harmful gas, convenient personnel evacuation, small corrosiveness of combustion gas and low halogen and no halogen when fire disaster occurs, so that the ageing resistance, ultraviolet resistance and other irradiation performance of the cable material are greatly improved, and the service life of the cable is prolonged.

Description

Environment-friendly A-level flame-retardant fire-resistant control cable

Technical Field

The utility model relates to the technical field of cables, in particular to an environment-friendly A-level flame-retardant fire-resistant control cable.

Background

With the development of industrial technology, people have higher requirements on the safety and environmental protection of wire and cable products in production and life, traditional wires and cables are easy to burn rapidly when fire disaster occurs because of not having good flame retardant and fire resistance, so that short circuit of the wires is caused, and a large amount of halogen polymers and halogen flame retardants are contained in insulating and sheathing materials of the wires and cables, so that a large amount of smoke and harmful gases are released, and the smoke and the harmful gases have strong irritation and are easy to cause casualties. Therefore, under the new development background, the technical research needs to be further increased, the cable structural design is perfected and optimized, and the environment-friendly A-level flame-retardant fire-resistant control cable with stronger technical performance is developed.

Disclosure of Invention

The utility model aims to make up the defects of the prior art and provides an environment-friendly A-level flame-retardant fire-resistant control cable which has the characteristics of difficult ignition, blocking and stopping or delaying spreading, no halogen, low smoke, no toxicity, no corrosion and the like, can not delay personnel evacuation and rescue once the fire is ignited, and is suitable for the fields such as high-rise buildings, hotels, hospitals, subways, nuclear power stations, tunnels, power stations, mines, petroleum, chemical industry and the like.

The utility model is realized by the following technical scheme:

an environment-friendly A-level flame-retardant fire-resistant control cable comprises a conductor, wherein a double-layer synthetic mica tape I is used for overlapping and wrapping, an insulating wire core is formed by extruding and irradiating a low-smoke halogen-free flame-retardant cross-linked polyolefin insulating layer, a plurality of insulating wire cores are twisted into a cable, a ceramic silicon rubber inner protective layer is extruded outside the cable core, a multi-layer synthetic mica tape II is firstly overlapped and wrapped outside the ceramic silicon rubber inner protective layer, then a copper wire braided shielding layer is wrapped, a low-smoke halogen-free high flame-retardant tape is used for wrapping outside the copper wire braided shielding layer, and an outer sheath is wrapped outside the low-smoke halogen-free high flame-retardant tape.

The conductor adopts a copper core conductor.

The outer sheath adopts a ceramic low-smoke halogen-free flame-retardant polyolefin outer sheath.

The utility model has the advantages that: the environment-friendly A-level flame-retardant fire-resistant control cable provided by the utility model has the characteristics of no halogen, low smoke, low halogen and low smoke, low spreading speed, low smoke concentration, high visibility, small release amount of harmful gas, convenience in personnel evacuation and small corrosiveness of combustion gas, and also avoids damage to instruments and equipment, and the characteristics of low halogen and no halogen, so that the ageing resistance, ultraviolet resistance and other irradiation performance of the cable material are greatly improved, and the service life of the cable is prolonged. The utility model is suitable for the fields such as high-rise buildings, hotels, hospitals, subways, nuclear power stations, tunnels, power plants, mines, petroleum, chemical industry and the like. Besides the characteristics of the low-smoke halogen-free flame-retardant cable, the cable can also meet the power supply capacity of the circuit under the fire condition, and is mainly used for fire-resistant occasions in power supply circuits of fire alarm, fire-fighting equipment, smoke discharging equipment, emergency facilities such as emergency channel transportation and illumination.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Description of the embodiments

As shown in fig. 1, the environment-friendly A-level flame-retardant fire-resistant control cable comprises a copper core conductor 1, wherein a double-layer synthetic mica tape I2 is used for overlapping and wrapping on the copper core conductor 1, an insulating wire core is formed by extruding and irradiating a low-smoke halogen-free flame-retardant crosslinked polyolefin insulating layer 3, a plurality of insulating wire cores are twisted into a cable, a ceramic silicone rubber inner protective layer 4 is extruded outside the cable core, a plurality of layers of synthetic mica tapes II 5 are firstly overlapped and wrapped outside the ceramic silicone rubber inner protective layer 4, a copper wire braided shielding layer 6 is then wrapped, a low-smoke halogen-free high-flame-retardant tape 7 is adopted outside the copper wire braided shielding layer 6 for wrapping, and a ceramic low-smoke halogen-free flame-retardant polyolefin outer protective sleeve 8 is wrapped outside the low-smoke halogen-free high-retardant tape 7.

The cable adopts the copper core conductor, the conductor is lapped and wrapped by the double-layer mica tape, the mica tape is a double-sided synthetic mica tape, synthetic mica paper is used as a base material, glass fiber cloth is used as a double-sided reinforcing material, and the double-sided synthetic mica tape is bonded by a silicone adhesive, so that the synthetic mica tape has small expansion coefficient, high dielectric strength, high resistivity and uniform dielectric strength, can resist heat up to more than 1000 ℃, and can well ensure the reliable operation of a circuit under the condition of flame combustion, thereby being the most ideal preferred material for manufacturing the fire-resistant electric wire and cable. The mica layer is extruded with 90-degree irradiation low smoke halogen-free flame retardant cross-linked polyolefin insulating material, which is prepared by taking polyolefin as a main raw material, adding various auxiliary agents, banburying, extruding and granulating, and has good processing performance, insulating performance and physical and mechanical properties. The cable is stranded after insulation, a layer of wrapping tape is firstly thinned and wound, the wrapping tape is removed when the inner protective layer is extruded, so that the inner protective material is extruded into a gap of the cable core to form an actual round shape, the inner protective layer adopts ceramic silicon rubber, and the ceramic silicon rubber is a novel high polymer refractory material and has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, and can be rapidly sintered into a hard ceramic shell at 600 ℃ or above, and the hard shell is not melted and dripped in a fire disaster environment, so that the high-performance high-temperature cable has the effects of flame retardance, fire resistance, fire prevention and fire isolation. The inner protection layer is wrapped outside the multilayer synthetic mica tape, can play a better flame-retardant and fire-resistant role in cooperation with the inner protection, the copper wire shielding layer is woven outside the cable core, current or signals are protected from external electromagnetic interference, interference of electromagnetic fields generated by the inner protection layer to the surrounding environment and current circulation faults are avoided, and the service performance of the cable is improved. The shielding layer is wrapped with a layer of low-smoke halogen-free high-flame-retardant tape, and the low-smoke halogen-free high-flame-retardant tape is an environment-friendly flame-retardant material, has the characteristics of high temperature resistance, flame retardance and the like, and can effectively improve the flame retardant property of the cable. The outer sheath adopts ceramic low-smoke halogen-free flame-retardant polyolefin material, ceramic low-smoke halogen-free flame-retardant polyolefin is a novel ceramic polyolefin high-molecular refractory material with excellent performance, which is a granular material prepared by taking polyolefin resin as a base material, adding other special auxiliary agents such as refractory filler, special modifier, antioxidant and the like and processing by a special process. The ceramic material can be hardened and gradually ceramic under flame state or at high temperature above 500 ℃, can resist 1200 ℃ continuously high temperature at the highest, has the advantages of high crusting speed, low crusting temperature, high strength of the ceramic armor body after ablation, complete surface, no obvious cracks, uniform micropores generated on the section, difficult combustion of the material when meeting fire, and capability of preventing flame spreading and disaster expansion after combustion, no generation of toxic and corrosive gas, reduction of harm to human body and accordance with national environmental protection requirements.

When a fire accident happens, the cable can block and delay the flame from diffusing and extending along the electric wires and the cables, reduces the expansion of the fire range of the electric wires and the cables, and has the characteristics of self-extinguishing after fire, and the advantages of no toxicity and low smoke. The product can keep the integrity of the wire and cable lines and the normal operation of line equipment under the condition that external flame is still burnt, thereby effectively reducing the loss caused by fire accidents and guaranteeing the life safety of personnel.

Claims (3)

1. An environment-friendly A-level flame-retardant fire-resistant control cable is characterized in that: the cable comprises a conductor, wherein a double-layer synthetic mica tape I is overlapped and wrapped on the conductor, an insulating wire core is formed by extruding and irradiating a low-smoke halogen-free flame-retardant cross-linked polyolefin insulating layer, a plurality of insulating wire cores are twisted into a cable, a ceramic silicon rubber inner protective layer is extruded outside the cable core, a second multi-layer synthetic mica tape II is overlapped and wrapped outside the ceramic silicon rubber inner protective layer, a copper wire braided shielding layer is wrapped, a low-smoke halogen-free high flame-retardant tape is adopted outside the copper wire braided shielding layer for wrapping, and an outer protective sleeve is wrapped outside the low-smoke halogen-free high flame-retardant tape.

2. An environmental-friendly class a flame retardant fire resistant control cable according to claim 1, wherein: the conductor adopts a copper core conductor.

3. An environmental-friendly class a flame retardant fire resistant control cable according to claim 1, wherein: the outer sheath adopts a ceramic low-smoke halogen-free flame-retardant polyolefin outer sheath.

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