CN210429386U

CN210429386U - Silane crosslinked polyethylene insulation low-smoke halogen-free low-smoke polyolefin sheath flame-retardant cable

Info

Publication number: CN210429386U
Application number: CN201921236309.5U
Authority: CN
Inventors: 高天磊; 宋相彬; 赵彦文; 高红阳; 孙皓
Original assignee: Wuxi Jiangnan Cable Co Ltd
Current assignee: Wuxi Jiangnan Cable Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-28
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a silane crosslinked polyethylene insulation low-smoke halogen-free low-smoke polyolefin sheath flame-retardant cable, which comprises a cable core, wherein the cable core is formed by stranding a plurality of insulation wire cores; filling a high-flame-retardant filling rope in a gap of a cable core, wrapping a polyester fiber reinforced composite winding wrapping tape outside the cable core, wrapping an inner polyester tape in the left direction of the polyester fiber reinforced composite winding wrapping tape, weaving a metal shielding layer outside the inner polyester tape, wrapping an outer polyester tape outside the metal shielding layer in the right direction, wrapping a second ceramic fireproof and flame-retardant composite tape outside the outer polyester tape, wherein the covering rate is not less than 80%; the second ceramic fireproof and fireproof composite belt is externally extruded with a low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath, a steel belt armoring layer is woven outside the low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath, and a low-smoke halogen-free flame-retardant polyolefin outer sheath is extruded outside the steel belt armoring layer. The utility model discloses have high temperature resistant, intensity is high, mechanical properties is good, electric insulating property is excellent, corrosion resistance to the life of cable has been prolonged.

Description

Silane crosslinked polyethylene insulation low-smoke halogen-free low-smoke polyolefin sheath flame-retardant cable

Technical Field

The utility model relates to a wire and cable field, concretely relates to low smoke and zero halogen low smoke polyolefin sheath flame retarded cable of silane crosslinked polyethylene insulation.

Background

A fire refers to a disaster caused by uncontrolled combustion in time and space. Among the various disasters, fire is one of the main disasters that threaten public safety and social development most often and most generally.

In order to save more lives, properties and information from an uninhabited fire scene, the application of the fireproof cable is becoming important, and the fireproof cables on the market at present are classified into rigid and flexible according to the structural characteristics. Rigid Mineral Insulated Cable the rigid Mineral Insulated Cable (MI Cable) has defects in reliability, production and laying, and gradually moves back to market in developed countries in Europe and America, so that the flexible Mineral Insulated fireproof Cable becomes a mainstream Cable product in the fireproof field;

the fire caused by electrical failure in the fire accident accounts for more than 60%; when a fire occurs, fire safety equipment such as an elevator and a fire pump are required to keep normal operation within a certain time, and a cable cannot generate toxic and harmful gas after combustion so as to avoid secondary harm and adverse effects on human bodies and the environment; moreover, mice usually bite in narrow environments such as a humid and dark elevator shaft, and the like, and the outer protective layer or the sheath of the cable is often bitten due to the rodent property of the mice to crack, so that immeasurable economic loss is caused, and meanwhile, great potential safety hazards are brought, and inconvenience is brought to people when the cable is used; the traditional cable is simple in structure, not only is not prevented from being bitten and gnawed by rats, but also is poor in fireproof performance, the safety performance cannot be provided, particularly, harmful substances can be generated after combustion, the health of human bodies is harmed, environmental pollution is easily caused, and the cable is not environment-friendly;

the existing bag straps (non-woven fabrics and glass fiber straps) are easy to crack, especially under the low-temperature condition, the situation of tensile fracture is easy to occur, the bag straps sold in the market at present mostly adopt the increase of the thickness of the bag straps to improve the tensile strength of the bag straps, however, the increase of the thickness not only can increase the cost, but also can cause the flexibility of the bag straps to be poor, the stiffness and smoothness are enhanced, and the problems of untight winding and the like are easy to occur.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the flame-retardant cable with the silane crosslinked polyethylene insulating low-smoke halogen-free low-smoke polyolefin sheath is provided.

In order to achieve the purpose, the utility model provides a silane crosslinked polyethylene insulation low smoke zero halogen low smoke polyolefin sheath flame retardant cable, which comprises a cable core, wherein the cable core is formed by twisting a plurality of insulation wire cores; filling a high-flame-retardant filling rope in a gap of a cable core, wrapping a polyester fiber reinforced composite winding wrapping tape outside the cable core, wrapping an inner polyester tape in the left direction of the polyester fiber reinforced composite winding wrapping tape, weaving a metal shielding layer outside the inner polyester tape, wrapping an outer polyester tape outside the metal shielding layer in the right direction, wrapping a second ceramic fireproof and flame-retardant composite tape with the thickness of 0.27mm outside the outer polyester tape, and covering the cable core with a covering rate of not less than 80%; the second ceramic fireproof fire-resistant composite belt is externally extruded with a low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath, a steel-tape armoring layer with the thickness of 0.2mm is woven outside the low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath, and a low-smoke halogen-free flame-retardant polyolefin outer sheath is extruded outside the steel-tape armoring layer.

Preferably, the insulated wire core is composed of a conductor, a first ceramic fireproof and fireproof composite belt extruded outside the conductor, and a silane crosslinked polyethylene insulating layer extruded outside the first ceramic fireproof and fireproof composite belt.

Preferably, the conductor is a class 1 solid conductor.

Preferably, the thickness of the ceramic fireproof and fireproof composite belt is 0.14 mm.

Preferably, the thickness of the silane crosslinked polyethylene insulating layer is 0.7 mm.

Preferably, the polyester fiber reinforced composite winding wrapping tape comprises a glass fiber tape, wherein the upper surface of the glass fiber tape is sequentially bonded with a polyester fiber non-woven fabric layer and a polyurethane film upwards through an adhesive, and the lower surface of the glass fiber tape is sequentially bonded with an alkali-free glass fiber tape and a polyurethane film downwards through an adhesive.

Preferably, the thickness of the low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath is 1.0 +/-0.1 mm.

Preferably, the thickness of the low-smoke halogen-free flame-retardant polyolefin outer sheath is 1.8 +/-0.1 mm.

The beneficial effects of the utility model reside in that:

compared with the prior art, the cable core gap is filled with the high-flame-retardant filling rope, so that the cable core is smooth and has no gap, and the cable has flame retardance; the insulating wire core and the cable are externally provided with ceramic fireproof and fireproof composite tapes instead of the traditional mica tapes, and can be fired into ceramic armor under the condition of 350-3000 ℃ flame or no flame, so that the incrustation performance is good, the fireproof and fireproof performance is excellent, and compared with the traditional mica tapes, the insulating wire core and the cable are low in density, high in strength, excellent in mechanical performance, excellent in electric insulation performance and waterproof; the silane crosslinked polyethylene insulating layer is prepared from a silane crosslinked polyethylene insulating material, so that the cable core has good insulating property, strong aging resistance and good thermal shrinkage; the adopted low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath not only has excellent mechanical and physical properties, oil resistance, electrical properties, flame retardant properties and processing technological properties, but also has the advantages of no halogen, low smoke emission and environmental protection; the cable has good physical and mechanical properties and good flame retardant property by adopting the low-smoke halogen-free flame retardant polyolefin outer sheath, and has high elongation at break, good cracking resistance and particularly excellent processability; the novel cable wrapping tape-polyester fiber reinforced composite winding tape is compounded by multiple materials, so that the tensile strength, the anti-cracking strength, the flame retardance, the elasticity and the like of the novel cable wrapping tape-polyester fiber reinforced composite winding tape are higher than those of the currently marketed tape (such as a glass fiber tape, a non-woven fabric and the like) under the condition of the same thickness, the tape is ensured to have better flexibility, the tape can be tightly attached to the surface of a cable core in the winding process, the problem of loose winding is solved, the corrosion resistance, the anti-cracking performance and the tensile fracture of the cable core are favorably ensured, certain elasticity is also provided, and multiple material layers have very strong flame retardance, and the flame retardance of the cable core is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.

As shown in fig. 1, the utility model provides a silane crosslinked polyethylene insulation low-smoke halogen-free low-smoke polyolefin sheath flame-retardant cable, which comprises a cable core, wherein the cable core is formed by twisting a plurality of insulation wire cores; the insulated wire core is composed of a class-1 solid conductor 1, a first ceramic fireproof and fireproof composite belt 2 which is extruded outside the class-1 solid conductor and has the thickness of 0.14mm, and a silane crosslinked polyethylene insulating layer 3 which is extruded outside the first ceramic fireproof and fireproof composite belt and has the thickness of 0.7 mm; the ceramic fireproof and fireproof composite tape is adopted to replace the traditional mica tape, can be fired into ceramic armor under the condition of 350-3000 ℃ flame or no flame, has good incrustation performance and excellent fireproof and fireproof performance, and has low density, high strength, excellent mechanical performance, excellent electrical insulation performance and water resistance compared with the traditional mica tape; the silane crosslinked polyethylene insulating layer is prepared from a silane crosslinked polyethylene insulating material, so that the cable core has good insulating property, strong aging resistance and good thermal shrinkage;

the high-flame-retardant filling rope 4 is filled in the gap of the cable core, so that the cable core is smooth and has no gap, and the cable has flame retardancy; the polyester fiber reinforced composite winding belting 5 is wound and wrapped outside the cable core, and mainly plays a role in tightening and flame retarding; an inner polyester belt 6 is wrapped in the polyester fiber reinforced composite winding belting in the left direction, a metal shielding layer 7 is woven outside the inner polyester belt, and an outer polyester belt 8 is wrapped outside the metal shielding layer in the right direction, so that a double structure with high temperature resistance, low temperature resistance and high mechanical strength is formed inside and outside the cable; wrapping a second ceramic fireproof fire-resistant composite belt 9 with the thickness of 0.27mm outside the outer polyester belt, wherein the covering rate is not less than 80%; the ceramic fireproof and fireproof composite tape is adopted to replace the traditional mica tape, can be fired into ceramic armor under the condition of 350-3000 ℃ flame or no flame, has good incrustation performance and excellent fireproof and fireproof performance, and has low density, high strength, excellent mechanical performance, excellent electrical insulation performance and water resistance compared with the traditional mica tape; the low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath 10 with the thickness of 1.0 +/-0.1 mm is extruded outside the second ceramic fireproof and fire-resistant composite belt, and the sheath has excellent mechanical and physical properties, oil resistance, electrical properties, flame retardant properties and processing technological properties, does not contain halogen and has low smoke emission; the steel tape armor layer 11 with the thickness of 0.2mm is woven outside the low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath, and the low-smoke halogen-free flame-retardant polyolefin outer sheath 12 with the thickness of 1.8 +/-0.1 mm is extruded outside the steel tape armor layer, so that the cable has good physical and mechanical properties and good flame retardant property, high elongation at break, good cracking resistance and particularly excellent processing property.

As shown in fig. 2, the polyester fiber reinforced composite winding wrapping tape comprises a glass fiber tape 51, wherein the upper surface of the glass fiber tape is sequentially bonded with a polyester fiber non-woven fabric layer 52 and a polyurethane film 53 upwards through an adhesive, and the lower surface of the glass fiber tape is sequentially bonded with an alkali-free glass fiber tape 54 and a polyurethane film 53 downwards through an adhesive; as a new cable wrapping tape, the cable wrapping tape is formed by compounding multiple materials, so that the tensile strength of the cable wrapping tape under the condition of the same thickness is much higher than that of a currently-sold tape (such as a glass fiber tape, a non-woven fabric and the like), the tape is ensured to have better flexibility, the tape can be tightly attached to the surface of a cable core in the winding process, the problem of loose winding is solved, the corrosion resistance, the cracking resistance and the tensile fracture resistance of the cable core are favorably ensured, certain elasticity is realized, and multiple material layers have very strong flame retardant property and the flame retardant property of the cable core is ensured.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the principle of the present invention, and these should also be considered as belonging to the protection scope of the present invention.

Claims

1. The utility model provides a silane crosslinked polyethylene insulation low smoke and zero halogen low smoke polyolefin sheath flame retarded cable, includes the cable core, its characterized in that: the cable core is formed by stranding a plurality of insulating wire cores; filling a high-flame-retardant filling rope in a gap of a cable core, wrapping a polyester fiber reinforced composite winding wrapping tape outside the cable core, wrapping an inner polyester tape in the left direction of the polyester fiber reinforced composite winding wrapping tape, weaving a metal shielding layer outside the inner polyester tape, wrapping an outer polyester tape outside the metal shielding layer in the right direction, wrapping a second ceramic fireproof and flame-retardant composite tape with the thickness of 0.27mm outside the outer polyester tape, and covering the cable core with a covering rate of not less than 80%; the second ceramic fireproof fire-resistant composite belt is externally extruded with a low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath, a steel-tape armoring layer with the thickness of 0.2mm is woven outside the low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath, and a low-smoke halogen-free flame-retardant polyolefin outer sheath is extruded outside the steel-tape armoring layer.

2. The silane crosslinked polyethylene insulated low-smoke halogen-free low-smoke polyolefin sheathed flame-retardant cable according to claim 1, characterized in that: the insulated wire core is composed of a conductor, a first ceramic fireproof and fireproof composite belt extruded outside the conductor, and a silane crosslinked polyethylene insulating layer extruded outside the first ceramic fireproof and fireproof composite belt.

3. The silane crosslinked polyethylene insulated low-smoke halogen-free low-smoke polyolefin sheathed flame-retardant cable according to claim 2, characterized in that: the conductor is a type 1 solid conductor.

4. The silane crosslinked polyethylene insulated low-smoke halogen-free low-smoke polyolefin sheathed flame-retardant cable according to claim 2, characterized in that: the thickness of the ceramic fireproof and fireproof composite belt is 0.14 mm.

5. The silane crosslinked polyethylene insulated low-smoke halogen-free low-smoke polyolefin sheathed flame-retardant cable according to claim 2, characterized in that: the thickness of the silane crosslinked polyethylene insulating layer is 0.7 mm.

6. The silane crosslinked polyethylene insulated low-smoke halogen-free low-smoke polyolefin sheathed flame-retardant cable according to claim 1, characterized in that: the polyester fiber reinforced composite winding bag belt comprises a glass fiber belt, wherein the upper surface of the glass fiber belt is sequentially bonded with a polyester fiber non-woven fabric layer and a polyurethane film upwards through an adhesive, and the lower surface of the glass fiber belt is sequentially bonded with an alkali-free glass fiber belt and a polyurethane film downwards through an adhesive.

7. The silane crosslinked polyethylene insulated low-smoke halogen-free low-smoke polyolefin sheathed flame-retardant cable according to claim 1, characterized in that: the thickness of the low-smoke halogen-free flame-retardant polyolefin oxygen-insulating inner sheath is 1.0 +/-0.1 mm.

8. The silane crosslinked polyethylene insulated low-smoke halogen-free low-smoke polyolefin sheathed flame-retardant cable according to claim 1, characterized in that: the thickness of the low-smoke halogen-free flame-retardant polyolefin outer sheath is 1.8 +/-0.1 mm.