CN104992786A - High temperature-resisting flexible environmental-protection fireproof flame-retardant flexible cable production process - Google Patents

Abstract

The production process of high-temperature-resistant, flexible, environmentally friendly, fire-resistant and flame-retardant flexible cables is produced through the processes of wire drawing, stranding, wrapping insulation, aluminum tube extrusion, cable filling tape, outer sheath packaging, and storage. The process of the invention realizes the flame-retardant protection and close combination of the cable outer sheath and the wire core, and the outer sheath with the armor layer enhances the mechanical protection and fire resistance of the cable, and simultaneously improves the bending flexibility of the cable; the wire core And the outer sheath is made of flame-retardant and environmentally friendly materials, which endows the cable products with good fire resistance and environmental protection performance.

Description

Production technology of high temperature resistant flexible environmental protection fireproof and flame retardant flexible cable

technical field

The invention relates to the technical field of electric power lines and cables, in particular to a production process of a high-temperature-resistant, flexible, environment-friendly, fire-proof and flame-retardant flexible cable.

Background technique

In recent years, after many fires in large-scale public entertainment venues, chemical industry, coal mines, and commercial buildings in China caused tragic losses of people's lives and property, people have a deeper understanding of fire protection and fire safety. With the rapid growth of urban population, the continuous increase of high-rise buildings, hotels, large supermarkets, hospitals, stations, and airports, the construction of subways and tunnel traffic, and the increase of large-scale public sports, entertainment venues, and public transportation facilities, fire prevention and fire prevention The importance of safety is highlighted.

60% of building fires are caused by electrical lines, whether it is the fire caused by the wires and cables themselves or the burning caused by external fire sources, because the wires and cables laid in the electrical shaft or trunking are often laid in bundles, and the burning time The heat radiation will conduct each other again, causing the fire to spread and flood. Wires and cables are generally laid in relatively hidden places in buildings, and it is difficult to be found in the early smoldering stage. When it was discovered later, it was already full of thick smoke, accompanied by a large amount of toxic gas, which provided a deeper protection for the burning objects in hidden places. After the wire and cable are ignited, billowing smoke and a large amount of toxic gas will be produced. In previous fires, the smog made escapers confused and panicked, prolonging the time they stayed in the fire scene. In addition, most of the unfortunate victims in the fire died of suffocation due to inhalation of toxic gas. It can be said that toxic gas is the number one killer in fire.

Contents of the invention

The invention provides a production process of a high-temperature-resistant, flexible, environment-friendly, fire-proof and flame-retardant flexible cable, in order to solve the problems of poor fire-proof and flame-retardant performance of the cable and toxic combustion gas existing in the prior art.

The technical solution adopted by the present invention to solve its technical problems is:

A production process for high-temperature-resistant, flexible, environment-friendly, fire-resistant, and flame-retardant flexible cables. The conductors are produced through wire drawing, stranding, wrapping insulation, aluminum tube extrusion, cable filling tape, outer sheath packaging, and warehousing. The specific The process steps are as follows:

(1) Wire drawing: the conductor is made of copper core, and the copper core is drawn by a wire drawing machine. After drawing, it is inspected to ensure that the surface is smooth, free of oil, free of damage to shielding and insulation burrs, sharp edges, and no single wires that are raised or broken;

(2) Stranded wire: After wire drawing, the copper core is twisted by a stranding machine, so that multiple single conductors are twisted into one strand, and the surface of the copper core strands is inspected;

(3) Wrapping insulation: Wrap a layer of heat-resistant silicone rubber tape on the surface of the copper core strand, and then wrap several layers of alloy mica tape to form an insulating layer. The covering rate of the tape wrapping insulation should not be less than 45%. ;

(4) Aluminum tube extrusion: Extrude the aluminum tube on the surface of the insulation layer of each copper core strand through the aluminum tube extrusion machine. For any disproportionate defects, the minimum thickness of the aluminum tube should not be less than 95%-0.1mm of the specified nominal value;

(5) Cable filling and wrapping: through the cable forming machine, asbestos rope is used to fill the surface of several aluminum tubes. The asbestos rope should be filled round and dense.

(6) Outer sheath packaging: If no armored cable is produced, the halogen-free, low-smoke, flame-retardant and environmentally friendly 105°C polyolefin sheath material is directly extruded on the surface of the asbestos rope filling layer through a plastic extruder as the outer sheath , the outer sheath should have uniform thickness, smooth surface, good plasticization, and no bad defects such as air holes in the cross-section, and the minimum measured value of its thickness should not be less than 80%-0.2mm of the specified nominal value; The plastic extruder extrudes the halogen-free, low-smoke, flame-retardant and environmentally friendly 105°C polyolefin sheath material on the surface of the asbestos rope filling layer as an oxygen barrier layer, and then spirally wraps several layers of metal tapes on the surface of the oxygen barrier layer through an armoring machine , so that the center line of the outer layer metal strip is roughly above the gap between the inner layer metal strip, the wrapping gap should not be greater than 50% of the width of the metal strip, the size of the steel strip should not exceed ±10% of the nominal value, and finally pass through the plastic extruder Extrude the halogen-free, low-smoke, flame-retardant and environmentally friendly 105°C polyolefin sheath material on the surface of the asbestos rope filling layer as the outer sheath. The outer sheath should have uniform thickness, smooth surface, good plasticization, and no defects such as pores in the cross-section. The minimum measured value of its thickness should not be lower than 80%-0.2mm of the specified nominal value;

(7) Warehousing: The cables processed in step (6) are put into the warehouse after being inspected and packaged by the head.

The outer sheath in the above step (6) can be designed as an outer sheath with special functions of anti-rat, anti-termite and anti-ultraviolet according to the needs of the environment. It may be necessary to use chemical additives, but these additives should not include materials harmful to humans and the environment .

The process of the invention realizes the flame-retardant protection and close combination of the cable outer sheath and the wire core, and the outer sheath with the armor layer enhances the mechanical protection and fire resistance of the cable, and simultaneously improves the bending flexibility of the cable; the wire core And the outer sheath is made of flame-retardant and environmentally friendly materials, which endows the cable products with good fire resistance and environmental protection performance.

Description of drawings:

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a process flow diagram of the present invention;

Fig. 2 is the structural representation of the cable that process of the present invention makes in specific embodiment 1;

Fig. 3 is a schematic structural view of the cable made in embodiment 2 by the process of the present invention.

In the figure, 1 conductor, 2 heat-resistant silicone rubber tape, 3 alloy mica tape, 4 aluminum tube, 5 flame retardant filler, 6 flame retardant oxygen barrier layer, 7 armor layer, 8 flame retardant outer sheath.

Detailed ways:

example 1

As shown in Figure 1 and Figure 2, a production process of high temperature resistant flexible environmentally friendly fireproof and flame retardant flexible cable, the conductor is drawn, stranded, wrapped and insulated, aluminum tube extruded, cabled and filled with tape, and outer sheath packaged And the production process of warehousing, the specific process steps are as follows:

(1) Wire drawing: the conductor is made of copper core, and the copper core is drawn by a wire drawing machine. After drawing, it is inspected to ensure that the surface is smooth, free of oil, free of damage to shielding and insulation burrs, sharp edges, and no single wires that are raised or broken;

(2) Stranded wire: After wire drawing, the copper core is twisted by a stranding machine, so that multiple single conductors are twisted into one strand, and the surface of the copper core strands is inspected;

(3) Wrapping insulation: Wrap a layer of heat-resistant silicone rubber tape on the surface of the copper core strand, and then wrap two layers of alloy mica tape to form an insulating layer. The covering rate of the tape wrapping insulation should not be less than 45%. ;

(4) Aluminum tube extrusion: Extrude the aluminum tube on the surface of the insulation layer of each copper core strand through the aluminum tube extrusion machine. For any disproportionate defects, the minimum thickness of the aluminum tube should not be less than 95%-0.1mm of the specified nominal value;

(5) Cable filling and wrapping: through the cable forming machine, asbestos rope is used to fill the surface of several aluminum tubes. The asbestos rope should be filled round and dense.

(6) Outer sheath packaging: Extrude the halogen-free, low-smoke, flame-retardant and environmentally friendly 105°C polyolefin sheath material directly through the plastic extruder on the surface of the asbestos rope filling layer as the outer sheath. The outer sheath should have a uniform thickness. The surface is smooth, well plasticized, and there are no bad defects such as pores in the cross-section. The minimum measured value of its thickness should not be less than 80%-0.2mm of the specified nominal value. For the outer sheath with special function of ultraviolet rays, it may be necessary to use chemical additives, but these additives should not include materials harmful to humans and the environment;

(7) Warehousing: The cables processed in step (6) are put into the warehouse after being inspected and packaged by the head.

Example 2

As shown in Figure 1 and Figure 3, the production process of a high-temperature-resistant flexible environmentally friendly fire-resistant and flame-retardant flexible cable, the conductor is drawn, stranded, wrapped and insulated, aluminum tube extruded, cabled and filled with tape, and outer sheath packaged And the production process of warehousing, the specific process steps are as follows:

(1) Wire drawing: the conductor is made of copper core, and the copper core is drawn by a wire drawing machine. After drawing, it is inspected to ensure that the surface is smooth, free of oil, free of damage to shielding and insulation burrs, sharp edges, and no single wires that are raised or broken;

(2) Stranded wire: After wire drawing, the copper core is twisted by a stranding machine, so that multiple single conductors are twisted into one strand, and the surface of the copper core strands is inspected;

(3) Wrapping insulation: Wrap a layer of heat-resistant silicone rubber tape on the surface of the copper core strand, and then wrap several layers of alloy mica tape to form an insulating layer. The covering rate of the tape wrapping insulation should not be less than 45%. ;

(4) Aluminum tube extrusion: Extrude the aluminum tube on the surface of the insulation layer of each copper core strand through the aluminum tube extrusion machine. For any disproportionate defects, the minimum thickness of the aluminum tube should not be less than 95%-0.1mm of the specified nominal value;

(5) Cable filling and wrapping: through the cable forming machine, asbestos rope is used to fill the surface of several aluminum tubes. The asbestos rope should be filled round and dense.

(6) Outer sheath packaging: To produce armored cables, first extrude the halogen-free, low-smoke, flame-retardant and environmentally friendly 105°C polyolefin sheath material on the surface of the asbestos rope filling layer as an oxygen barrier through a plastic extruder, and then pass The armoring machine spirally wraps several layers of metal tapes on the surface of the oxygen barrier layer, so that the center line of the outer metal tape is roughly above the gap between the inner metal tapes. The tape gap should not be greater than 50% of the width of the metal tape, and the size of the steel tape should not exceed Exceeding ±10% of the nominal value, finally extrude the halogen-free, low-smoke, flame-retardant and environmentally friendly 105°C polyolefin sheath material on the surface of the asbestos rope filling layer through a plastic extruder, and the outer sheath should have a uniform thickness , the surface is smooth, the plasticization is good, and the section has no bad defects such as pores. The minimum measured value of its thickness should not be less than 80%-0.2mm of the specified nominal value. The outer sheath can be designed as an outer sheath with special functions of anti-rat, anti-termite and anti-ultraviolet according to the environmental needs. It may be necessary to use chemical additives, but these additives should not include materials harmful to humans and the environment;

(7) Warehousing: The cables processed in step (6) are put into the warehouse after being inspected and packaged by the head.

Claims (2)

1. a production technology for high-temperature flexible environmental-protection fireproof flame-retardant flexible electric cable, it is characterized in that conductor by wire drawing, twisted wire, lapped insulation, aluminum pipe are extruded, stranding fills band, outer jacket packaging and warehouse-in operation are produced and obtained, concrete technology step is as follows:

(1) wire drawing: conductor adopts copper core, and copper core carries out wire drawing by wire drawing machine, through inspection after wire drawing, the burr, the sharp edge that guarantee any surface finish, shield and insulate without greasy dirt, not damaged, without single line that is protruding or fracture;

(2) twisted wire: after wire drawing, copper core carries out twisted wire through stranding machine, makes many lists prop up conductor and is twisted into one, is testing to copper core stock surface;

(3) lapped insulation: at the wrapped one deck heat-resistant silicon rubber band in copper core stock surface, then at wrapped some laminated gold mica tapes, thus form insulating barrier, the strip material lapping insulating rate of putting up should be not less than 45%;

(4) aluminum pipe is extruded: by aluminum pipe extruder, aluminum pipe is squeezed in each copper core strand insulation layer on the surface, aluminum tube layer answers thickness even, any surface finish is without any defects disproportionate with good industrial goods such as greasy dirt, cracking, burrs, and aluminum pipe minimum thickness should be not less than the 95%-0.1mm of regulation nominal value;

(5) stranding fills band: adopt asbestos cord to be filled in some aluminum tube surfaces by cabler, asbestos cord should fill rounding, closely knit, and stranding should adopt non-moisture absorption anti-flaming environment-friendly strip lap to tighten after filling;

(6) outer jacket packaging: as produced armorless cable, then directly LSOH anti-flaming environment-friendly 105 DEG C of polyolefin jacket materials are squeezed in asbestos cord packed layer surface as oversheath by plastic extruder, oversheath answers thickness even, any surface finish, plasticizing is good, the bad defects such as section pore-free, the minimum measured value of its thickness should be not less than the 80%-0.2mm of regulation nominal value, as produced armoured cable, first by plastic extruder, LSOH anti-flaming environment-friendly 105 DEG C of polyolefin jacket materials are squeezed in asbestos cord packed layer surface as oxygen barrier layer, then by armoring machine, some layers of metal tape spiral winding are wrapped in oxygen barrier layer surface, make the center line of outer layer metal band roughly above inner layer metal band gap, band gap should be not more than 50% of metal tape width, steel band size should be no more than nominal value ± 10%, finally by plastic extruder, LSOH anti-flaming environment-friendly 105 DEG C of polyolefin jacket materials are squeezed in asbestos cord packed layer surface as oversheath, oversheath answers thickness even, any surface finish, plasticizing is good, the bad defects such as section pore-free, the minimum measured value of its thickness should be not less than the 80%-0.2mm of regulation nominal value,

(7) put in storage: the cable that step (6) is processed, after inspection and end socket Proper Packing, is put in storage.

2. the production technology of high-temperature flexible environmental-protection fireproof flame-retardant flexible electric cable according to claim 1, is characterized in that oversheath in step (6) environmentally needs to be designed to protection against rodents, the oversheath that termite-proof, antiultraviolet has specific function.