CN210489303U - Cross-linked halogen-free low-smoke polyolefin insulation flame-retardant power cable - Google Patents

Abstract

The utility model discloses a crosslinking halogen-free low-smoke polyolefin insulation flame-retardant power cable, including crosslinking halogen-free low-smoke polyolefin insulation cable, wrap the basalt fiber fire hose after wrapping up the ceramic fiber heat insulation cotton outside crosslinking halogen-free low-smoke polyolefin insulation cable, extrude the black low-smoke halogen-free spacer sleeve outside the basalt fiber fire hose, wrap the compound fire hose of teflon outside the black low-smoke halogen-free spacer sleeve, be equipped with the reinforcement core sheath outside the compound fire hose of teflon, wrap the insulating flame-retardant sticky tape outside the reinforcement core sheath, extrude the halogen-free low-smoke flame-retardant polyolefin oversheath outside the insulating flame-retardant sticky tape; the product has excellent flame retardant property, less smoke during combustion and no corrosive gas escape, and is widely applied to nuclear power stations, subway stations, telephone exchanges, computer control centers, high-rise buildings, hotels, broadcast stations, important military facilities, oil platforms and other places with concentrated personnel and low air density.

Description

Cross-linked halogen-free low-smoke polyolefin insulation flame-retardant power cable

Technical Field

The utility model relates to a cable conductor field specifically is a fire-retardant power cable of crosslinking halogen-free low cigarette polyolefin insulation.

Background

Along with the frequent occurrence of fire accidents, people continuously deepen the understanding of the fire hazard risk of the electric wire and the electric cable, and the requirements of relevant departments on the performances of fire prevention, flame retardance and the like of the electric wire and the electric cable are higher and higher. The cable fire disaster has the characteristics of fast spread, difficult fire fighting, secondary hazard generation, long recovery time and the like, and can bring huge loss to national economy and the lives and properties of people. Therefore, more severe operating conditions are provided for the flame retardant property, the fireproof property and the safety and reliability of the wires and cables. If the fire-fighting elevator and the fire pump are in fire prevention, explosion prevention, strong overload capacity and long service life, the fire-fighting elevator and the fire pump need to be kept in normal operation for a certain time under the condition of fire, and the cable has special requirements of low smoke, low halogen and low toxicity after combustion, even no smoke, no halogen, no toxicity and the like. The fire-retardant and fire-proof measures of the cable are important means for reducing the fire delay of the cable, and the key point is that the fire-retardant and fire-proof measures are mainly used for preventing fire, and various fire-retardant cables, fire-resistant cables and fire-proof cables are widely applied.

In recent years, casualties in public fire sometimes occur. The main reasons are the use of large amounts of combustible materials and the large amounts of smoke and toxic gases generated during combustion. With the increasing attention of people to environmental protection and fire protection consciousness, the requirements of fire departments on the safety and reliability of modern high-rise buildings, various important construction projects and residential facility fire protection systems are continuously improved. Modern buildings have great technological advances in function, structure, materials and the like. A large amount of organic chemical materials are used in buildings, the traditional flame-retardant cable is not suitable for the actual conditions of violent flame and extremely high temperature of fire disasters of modern buildings, and the temperature grade of the flame-retardant cable is necessary to be continuously improved; and the existing cable has poor strength, elasticity, fire resistance, high temperature resistance and strong corrosion resistance, so that the service life of the cable is short.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that exists among the prior art, provide a fire-retardant power cable of cross-linking halogen-free low smoke polyolefin insulation, this product fire behaviour is superior, and the smoke intensity is very few during the burning, and noncorrosive gas escapes, and the wide application is in nuclear power station, subway station, telephone exchange and computer control center, high-rise building, hotel, broadcast television station, important military facilities, oil platform etc to and personnel are more concentrated, the place that air density is low.

A crosslinking does not have steamed low cigarette polyolefin insulation flame retardant power cable, including crosslinking does not have steamed low cigarette polyolefin insulation cable, wrap the basalt fiber fire hose after the thermal-insulated cotton of wrapping up ceramic fiber outside crosslinking does not have steamed low cigarette polyolefin insulation cable again, extrude black low cigarette halogen-free spacer outside basalt fiber fire hose, wrap the compound fire hose of teflon outside at black low cigarette halogen-free spacer, be equipped with the enhancement core sheath outside the compound fire hose of teflon, wrap insulating flame retardant sticky tape outside the enhancement core sheath, extrude the steamed low cigarette flame retardant polyolefin oversheath outside insulating flame retardant sticky tape.

The cross-linked halogen-free low-smoke polyolefin insulated cable is further improved by two cross-linked halogen-free low-smoke polyolefin insulated wire cores and a cross-linked halogen-free low-smoke polyolefin insulating layer which is jointly extruded outside the two cross-linked halogen-free low-smoke polyolefin insulated wire cores.

The crosslinked halogen-free low-smoke polyolefin insulated wire core comprises a tinned copper conductor, a basalt fiber fireproof belt is wrapped outside the tinned copper conductor, and a semiconductive shielding layer is wrapped outside the basalt fiber fireproof belt.

The improved Teflon composite fire-retardant belt comprises a Teflon mesh belt base body, wherein the upper surface of the Teflon mesh belt base body is connected with a terylene flame-retardant non-woven fabric through silicon viscose, and the lower surface of the Teflon mesh belt base body is connected with a glass fiber fireproof flame-retardant fabric through the silicon viscose.

The improved structure is characterized in that the reinforcing core protective layer is of a circular ring shape, and is formed by pouring flame-retardant glue at the gap between the carbon fiber cores after a plurality of carbon fiber cores are arranged and combined into a circle and then solidifying the flame-retardant glue.

The insulating flame-retardant adhesive tape comprises a PC flame-retardant film on the uppermost layer, a glass fiber tape in the middle layer and a polyimide film on the lowermost layer, wherein the three layers are laminated by adhesives.

The black low-smoke halogen-free isolation sleeve is further improved, and is made of black low-smoke halogen-free oxygen-isolating sheath materials, and the thickness of the black low-smoke halogen-free isolation sleeve is 1.1 +/-0.1 mm.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the tin-plated copper conductor has stronger tensile property than a copper conductor, so that the tensile property of the wire core is strong, the bending resistance is strong, and the wire core is not easy to break;

2. the basalt fiber fireproof belt is arranged outside the conductor, has the characteristics of non-inflammability, high temperature resistance (1100 ℃), compact structure, no irritation and the like, can well protect the conductor from a hot fire point and a spark area, thoroughly prevents combustion or isolates combustion, greatly improves the fireproof performance of the cable, and is a non-toxic environment-friendly material; the basalt fiber fireproof belt is arranged outside the cable core, so that the flame retardant property of the cable core is improved, and internal and external flame retardant double insurance is formed;

3. the ceramic fiber heat insulation cotton is adopted to replace the existing filling and is tightly attached to the wire core without gaps, so that the problems of unevenness and incompactness of the existing filling are solved, the wire core is better protected from being extruded and deformed, and the cable core has the characteristics of light weight, high strength, oxidation resistance, low heat conductivity, good flexibility, corrosion resistance and the like;

4. the cable is sequentially provided with a plurality of layers of fireproof and flame-retardant structures from inside to outside to form a flame-retardant net with a plurality of layers of flame-retardant structures, so that the flame retardant property of the cable is improved by dozens of times or even hundreds of times compared with the existing cable;

5. in order to improve the integral tensile property of the cable, the reinforced core protective layer is arranged, so that the cable has better rigidity and higher strength than a steel core, and has light weight, and the cable has the properties of high strength, high temperature resistance, corrosion resistance, fatigue resistance, tensile resistance and the like; the flame-retardant glue has the function of fixing the carbon fiber core after being cured, so that the reinforced core protective layer has flame-retardant property, and the flame-retardant property of the cable is further improved;

6. the product has excellent flame retardant property, less smoke during combustion and no corrosive gas escape, and is widely applied to nuclear power stations, subway stations, telephone exchanges, computer control centers, high-rise buildings, hotels, broadcast stations, important military facilities, oil platforms and other places with concentrated personnel and low air density.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a Teflon composite fire belt;

FIG. 3 is a schematic view of the structure of the sheath of the reinforcement core;

fig. 4 is a schematic structural view of an insulating flame-retardant adhesive tape.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the cross-linked halogen-free low-smoke polyolefin insulation flame-retardant power cable comprises a cross-linked halogen-free low-smoke polyolefin insulation cable, wherein the cross-linked halogen-free low-smoke polyolefin insulation cable is formed by two cross-linked halogen-free low-smoke polyolefin insulation wire cores and a cross-linked halogen-free low-smoke polyolefin insulation layer 4 jointly extruded outside the two cross-linked halogen-free low-smoke polyolefin insulation wire cores;

the crosslinked halogen-free low-smoke polyolefin insulated wire core comprises a tinned copper conductor 1, a basalt fiber fireproof belt 2 is wrapped outside the tinned copper conductor, a semi-conductive shielding layer 3 is wrapped outside the basalt fiber fireproof belt, and the basalt fiber fireproof belt is wrapped in the wire core, so that the cable core has the characteristics of non-combustion, high temperature resistance (1100 ℃), compact structure, no irritation and the like, can well protect the conductor from a hot fire point and a spark area, thoroughly prevents combustion or isolates combustion, greatly improves the fireproof performance of the cable, and is a non-toxic environment-friendly material;

the fireproof cable is characterized in that ceramic fiber heat insulation cotton 5 wraps the outer portion of a cross-linked halogen-free low-smoke polyolefin insulation cable, then a basalt fiber fireproof belt 2 is wrapped in a winding mode, a black low-smoke halogen-free isolation sleeve 6 wraps the outer portion of the basalt fiber fireproof belt, a teflon composite fireproof belt 7 wraps the outer portion of the black low-smoke halogen-free isolation sleeve, a reinforced core protective layer 8 is arranged outside the teflon composite fireproof belt, an insulating flame-retardant adhesive tape 9 wraps the outer portion of the reinforced core protective layer, and a low-smoke halogen-free flame-retardant polyolefin outer sheath 10 wraps the outer portion of the insulating flame-retardant adhesive tape in an extrusion mode, so that the fireproof cable is excellent in flame retardant performance, low in smoke intensity during combustion and free of corrosive gas escape, and is widely applied to nuclear power stations, subway stations, telephone exchanges and computer control centers, high-rise buildings, hotels, broadcast;

as shown in fig. 2, the teflon composite fire-retardant belt comprises a teflon mesh belt substrate 11, wherein the upper surface of the teflon mesh belt substrate is connected with a polyester flame-retardant non-woven fabric 12 through silicon viscose, and the lower surface of the teflon mesh belt substrate is connected with a glass fiber flame-retardant fabric 13 through silicon viscose, so that the performance of the cable is 10-20 times better than that of the cable adopting flame-retardant materials such as non-woven fabrics, glass fibers and the like after compounding, and the teflon composite fire-retardant belt has good chemical corrosion resistance, high temperature resistance, high strength, good elasticity, good heat resistance, good wear resistance and good light resistance;

as shown in fig. 3, the reinforcing core sheath is annular, and is formed by arranging and combining a plurality of carbon fiber cores into a circle and pouring flame-retardant glue 15 in the gap between the carbon fiber cores 14 for curing, and the reinforcing core sheath has better rigidity and higher strength than the steel cores and has light weight, so that the cable has the performances of high strength, high temperature resistance, corrosion resistance, fatigue resistance, tensile resistance and the like; the flame-retardant glue has the function of fixing the carbon fiber core after being cured, so that the reinforced core protective layer has flame-retardant property, and the flame-retardant property of the cable is further improved;

as shown in fig. 4, the insulating flame-retardant adhesive tape comprises a PC flame-retardant film 16 at the uppermost layer, a glass fiber tape 17 at the middle layer and a polyimide film 18 at the lowermost layer, wherein the three layers are bonded by adhesives, fine sand, medium sand, coarse sand, matte and other textures are arranged on the surface of the PC flame-retardant film, the UL94 fire rating reaches V-0 or VTM-0, and the film has good formability, excellent mechanical properties, good dimensional stability and high flame-retardant rating at high temperature, is environment-friendly and is easy to recycle; the integral composite structure has the advantages of simple structure, good electrical insulation performance, good flame retardant performance, long service life, firmness, durability and the like.

The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.

Claims (7)

1. The utility model provides a fire-retardant power cable of crosslinking halogen-free low smoke polyolefin insulation which characterized in that: including crosslinked halogen-free low smoke polyolefin insulated cable, wrap the basalt fiber fire hose after the thermal-insulated cotton of ceramic fiber outside crosslinked halogen-free low smoke polyolefin insulated cable again, at the black low smoke zero halogen spacer sleeve of crowded package outside the basalt fiber fire hose, wrap the compound fire hose of teflon outside black low smoke zero halogen spacer sleeve, be equipped with the enhancement core sheath outside the compound fire hose of teflon, wrap the fire-retardant sticky tape of insulating at the enhancement core sheath outside, extrude the fire-retardant polyolefin oversheath of low smoke zero halogen outside the fire-retardant sticky tape of insulating package.

2. The cross-linked halogen-free low-smoke polyolefin insulated flame-retardant power cable according to claim 1, characterized in that: the cross-linked halogen-free low-smoke polyolefin insulated cable is formed by two cross-linked halogen-free low-smoke polyolefin insulated wire cores and a cross-linked halogen-free low-smoke polyolefin insulating layer which is jointly extruded and wrapped outside the two cross-linked halogen-free low-smoke polyolefin insulated wire cores.

3. The cross-linked halogen-free low-smoke polyolefin insulated flame-retardant power cable according to claim 1, characterized in that: the crosslinked halogen-free low-smoke polyolefin insulated wire core comprises a tinned copper conductor, a basalt fiber fireproof belt is wrapped outside the tinned copper conductor, and a semi-conductive shielding layer is wrapped outside the basalt fiber fireproof belt.

4. The cross-linked halogen-free low-smoke polyolefin insulated flame-retardant power cable according to claim 1, characterized in that: the teflon composite fireproof belt comprises a teflon mesh belt base body, wherein the upper surface of the teflon mesh belt base body is connected with a terylene flame-retardant non-woven fabric through silicon viscose, and the lower surface of the teflon mesh belt base body is connected with a glass fiber fireproof flame-retardant fabric through the silicon viscose.

5. The cross-linked halogen-free low-smoke polyolefin insulated flame-retardant power cable according to claim 1, characterized in that: the reinforced core protective layer is of a circular ring shape, and is formed by pouring flame-retardant glue at the gap between the carbon fiber cores after a plurality of carbon fiber cores are arranged and combined into a circle and then solidifying the flame-retardant glue.

6. The cross-linked halogen-free low-smoke polyolefin insulated flame-retardant power cable according to claim 1, characterized in that: the insulating flame-retardant adhesive tape comprises a PC flame-retardant film on the uppermost layer, a glass fiber tape in the middle layer and a polyimide film on the lowermost layer, wherein the three layers are laminated through adhesives.

7. The cross-linked halogen-free low-smoke polyolefin insulated flame-retardant power cable according to claim 1, characterized in that: the black low-smoke halogen-free isolation sleeve is made of black low-smoke halogen-free oxygen-isolating sheath materials, and the thickness of the black low-smoke halogen-free isolation sleeve is 1.1 +/-0.1 mm.

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