CN210271876U - Flame-retardant and high-temperature-resistant cable - Google Patents

Abstract

The utility model discloses an anti flame retardant high temperature resistant cable belongs to wire and cable technical field, its technical scheme main points are interior protective layer and outer protective layer including cable core and cladding on cable core, interior protective layer includes the sealing insulation layer and the outer dampproofing barrier layer of inlayer, it has the nylon powder to fill between cable core and the sealing insulation layer, outer protective layer divide into the insulating layer from inside to outside in proper order, armour layer and anti-corrosion coating, the insulating layer includes the glass fiber layer and the outer aluminium foil layer of inlayer, armour layer is the zinc-plated steel wire layer of cladding on the aluminium foil layer, anti-corrosion coating is for coating the LLDPE coating on zinc-plated steel wire layer. The utility model discloses carry out the innovative design on the basis that combines present generally used high temperature resistant cable conductor, set up glass fiber layer and aluminium foil layer in the armour in situ for the cable not only has good high temperature resistant characteristics, but also has ventilative radiating effect, thereby makes distributing away that the heat on the cable core can be faster.

Description

Flame-retardant and high-temperature-resistant cable

Technical Field

The utility model belongs to the technical field of wire and cable, specificly indicate an anti flame retardant high temperature resistant cable.

Background

A cable is typically a rope-like material made up of several twisted sets of conductors, each set insulated from the other and often twisted around a center, and covered with a highly insulating covering, usually overhead or installed underground, underwater, for telecommunication or power transmission.

With the development of society, the number of cables used as transmission media is also increasing, and thus, the requirements for cables are also increasing. In order to ensure normal and stable operation of the cable, the cable needs to have basic safety performance, such as wear resistance, flame retardancy, fire resistance, etc., however, the corresponding safety performance of some existing cables is different due to different purposes, such as some cables with flame retardancy, which have weak waterproof and moisture-proof performance and poor heat dissipation performance and cannot quickly dissipate heat generated by wires in the cable, thereby resulting in high temperature of the whole cable.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to provide a cable that has good heat dispersion and still anti fire-retardant, high temperature resistance to the problem that the aforesaid exists.

The purpose of the utility model is realized like this: the utility model provides an anti flame retardant high temperature resistant cable, includes the cable core that forms by the transposition of stranded wire and inner protective layer and the outer protective layer of cladding on the cable core, wherein, inner protective layer includes the sealed insulating layer and the outer dampproofing barrier layer of inlayer, the cable core with it has nylon powder to fill between the sealed insulating layer, outer protective layer divide into insulating layer, armor layer and anti-corrosion coating from inside to outside in proper order, the insulating layer includes the glass fiber layer and the outer aluminium foil layer of inlayer, the armor layer be the cladding in galvanized steel wire layer on the aluminium foil layer, anti-corrosion coating for coat in LLDPE coating in on the galvanized steel wire layer.

By adopting the technical scheme, after a plurality of wires are stranded into a cable core, the outer surface of the cable core is coated with the inner protective layer and the outer protective layer, wherein nylon powder is filled between the inner protective layer and the cable core, and the nylon powder is tough horn-shaped semitransparent or milky crystalline resin and has the characteristics of good electrical insulation, wear resistance, heat resistance, shock absorption and the like, so that the nylon powder is used as a filler; the inner protection layer consists of a sealing insulating layer and a moisture-proof barrier layer, the sealing insulating layer can perform insulation protection on the cable core, and the moisture-proof barrier layer can perform waterproof and moisture-proof preparation on the cable core; the outer protective layer consists of a heat insulation layer, an armor layer and an anti-corrosion layer, the aluminum foil is a rolled aluminum product with a rectangular and uniform cross section and has good heat dissipation performance, so that the aluminum foil layer is arranged on the inner protective layer, the temperature on the cable core can be conducted to the aluminum foil layer, the heat dissipation and cooling effects are further achieved, the glass fiber is an inorganic non-metal material with excellent performance, the insulation performance and the heat resistance are excellent, and the cable core has the characteristics of good flame retardance and high temperature resistance through the glass fiber; in order to improve the compression strength and the tensile strength of the whole cable, a galvanized steel wire layer is arranged, and a LLDPE coating is coated on the surface of the galvanized steel wire layer due to the weak wear resistance and corrosion resistance of the galvanized steel wire, wherein the LLDPE is linear low-density polyethylene, and all properties of the LLDPE are superior to those of polyethylene, so that the material is adopted as the outer layer of the sheath of the electric wire and cable.

The utility model discloses further set up to: the utility model discloses an aluminium foil layer, including aluminium foil layer, heat dissipation strip, aluminium foil layer outer surface has the heat dissipation strip that sets up along its length direction, the heat dissipation strip has a plurality ofly and follows the circumference direction evenly distributed of aluminium foil layer, the transversal acute triangle-shaped of personally submitting of heat dissipation strip, just the both sides wall of heat dissipation strip is the arc surface of outside salient, it is protruding to go back evenly distributed has a plurality of heat dissipations on the arc surface.

Through adopting above-mentioned technical scheme, set up the heat dissipation strip at the surface of aluminium foil layer to and set up the heat dissipation arch on the heat dissipation strip, thereby make the heat on the cable core can faster distribute away.

The utility model discloses further set up to: the glass fiber layer is composed of an inner glass fiber cloth layer and an outer glass fiber cloth layer and a glass fiber needled felt layer which is sandwiched between the inner glass fiber cloth layer and the outer glass fiber cloth layer, and the total thickness of the two glass fiber cloth layers and the glass fiber needled felt layer is 3-5 mm.

By adopting the technical scheme, the glass fiber cloth of the inner layer and the outer layer and the glass fiber needled felt of the interlayer are respectively made of the glass fibers, so that the heat insulation effect on the cable core is improved, and the high temperature resistance effect is achieved.

The utility model discloses further set up to: the sealing insulating layer is made of polyvinyl chloride.

Through adopting above-mentioned technical scheme, polyvinyl chloride has good insulating effect, consequently regards it as the insulating sheath of cable core.

The utility model discloses further set up to: the moisture-proof barrier layer comprises an outer waterproof layer, a middle waterproof layer and an inner breathable layer, the waterproof layer is made of super absorbent resin, the waterproof layer is a double-layer non-woven fabric layer, and the breathable layer is a waterproof breathable film layer made of high polymer materials.

By adopting the technical scheme, the super absorbent resin is a novel functional polymer material, has a high water absorption function of absorbing water which is hundreds to thousands times heavier than the self weight, has excellent water retention performance, is difficult to separate water even if pressurized once the super absorbent resin absorbs water and expands to form hydrogel, and can effectively avoid water infiltration through a waterproof layer made of the material; the non-woven fabric has the effects of moisture resistance, ventilation and the like, so that the permeated water vapor can be blocked; the waterproof breathable film is a novel high-molecular waterproof material, and the principle is that water particles are very fine in the water vapor state, and the water particles can smoothly permeate to the other side of a capillary tube according to the capillary motion principle, so that the vapor permeation phenomenon is caused. When water vapor is condensed and turns into water drops, the particles become bigger, and due to the action of the surface tension of the water drops (mutual pulling and balancing among water molecules), the water molecules can not smoothly separate from the water drops and permeate to the other side, so that the water permeation is prevented, and the water vapor can not permeate into the insulating sleeve and the cable core.

Drawings

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

FIG. 2 is a schematic view of the moisture barrier of the present invention;

FIG. 3 is a schematic structural view of the thermal insulation layer of the present invention;

the reference numbers in the figures are: 1. a cable core; 2. an inner protective layer; 21. sealing the insulating layer; 22. a moisture barrier layer; 221. a waterproof layer; 222. a water barrier layer; 223. a breathable layer; 3. an outer protective layer; 31. a thermal insulation layer; 311. an aluminum foil layer; 312. a heat dissipating strip; 313. a heat dissipation protrusion; 314. a glass fiber cloth layer; 315. a glass fiber needled felt layer; 32. an armor layer; 33. an anti-corrosion layer; 4. nylon powder.

Detailed Description

In order to make the technical solutions in the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings:

as shown in fig. 1 and fig. 3, a flame-retardant and high-temperature-resistant cable, which includes a cable core 1 formed by twisting a plurality of wires, and an inner protective layer 2 and an outer protective layer 3 coated on the cable core 1, wherein the inner protective layer 2 includes an inner sealing insulating layer 21 and an outer moisture-proof barrier layer 22, nylon powder 4 is filled between the cable core 1 and the sealing insulating layer 21, the outer protective layer 3 is sequentially divided into a heat insulating layer 31, an armor layer 32 and an anti-corrosion layer 33 from inside to outside, the heat insulating layer 31 includes an inner glass fiber layer and an outer aluminum foil layer 311, the armor layer 32 is a galvanized steel wire layer coated on the aluminum foil layer 311, and the anti-corrosion layer 33 is a LLDPE coating coated on the galvanized steel wire layer.

After a plurality of wires are twisted into a cable core 1, an inner protective layer 2 and an outer protective layer 3 are coated on the outer surface of the cable core 1, wherein nylon powder 4 is also filled between the inner protective layer 2 and the cable core 1, and the nylon powder 4 is tough horn-shaped semitransparent or milky crystalline resin which has the characteristics of good electrical insulation, wear resistance, heat resistance, shock absorption and the like, so that the nylon powder is used as a filler; the inner protection layer 2 consists of a sealing insulating layer 21 and a moisture-proof barrier layer 22, the sealing insulating layer 21 can perform insulating protection on the cable core 1, and the moisture-proof barrier layer 22 can make waterproof and moisture-proof preparations for the cable core 1; the outer protective layer 3 consists of a heat insulation layer 31, an armor layer 32 and an anti-corrosion layer 33, the aluminum foil is a rolled aluminum product with a rectangular and uniform cross section and has good heat dissipation performance, so that the aluminum foil layer 311 is arranged on the inner protective layer 2, the temperature on the cable core 1 can be conducted to the aluminum foil layer 311, the heat dissipation and cooling effects are further achieved, the glass fiber is an inorganic non-metallic material with excellent performance, the insulation performance and the heat resistance are excellent, and the cable core 1 has the characteristics of good flame retardance and high temperature resistance through the glass fiber; in order to improve the compression strength and the tensile strength of the whole cable, a galvanized steel wire layer is arranged, and a LLDPE coating is coated on the surface of the galvanized steel wire layer due to the weak wear resistance and corrosion resistance of the galvanized steel wire, wherein the LLDPE is linear low-density polyethylene, and all properties of the LLDPE are superior to those of polyethylene, so that the material is adopted as the outer layer of the sheath of the electric wire and cable.

As shown in fig. 2, the moisture-proof barrier layer 22 includes a waterproof layer 221 of an outer layer, a water-proof layer 222 of an intermediate layer, and a breathable layer 223 of an inner layer; the waterproof layer 221 is made of super absorbent resin, which has a super absorbent function of absorbing water several hundred to several thousand times heavier than itself, and has excellent water retention property, and can effectively avoid water infiltration; the water-resisting layer 222 is a double-layer non-woven fabric layer, and the non-woven fabric has the effects of moisture resistance, air permeability and the like, so that the permeated water vapor can be blocked; the breathable layer 223 is a waterproof breathable film layer made of high polymer materials, and has a good breathable effect so as to facilitate heat dissipation.

As shown in FIG. 3, the glass fiber layer is composed of an inner glass fiber cloth layer 314 and an outer glass fiber felt layer 315 sandwiched therebetween, and the total thickness of the two glass fiber cloth layers 314 and the glass fiber felt layer 315 is 3-5 mm. The glass fiber cloth of the inner layer and the glass fiber needled felt of the interlayer are respectively made of glass fiber, so that the heat insulation effect on the cable core 1 is improved, and the high-temperature resistance effect is achieved.

The utility model discloses further set up to, sealing insulation layer 21 adopts polyvinyl chloride to make, and polyvinyl chloride has good insulating effect, consequently regards it as the insulating sheath of cable core 1.

The utility model discloses further set up to, as shown in fig. 3, aluminium foil layer 311 surface has the heat dissipation strip 312 that sets up along its length direction, and heat dissipation strip 312 has a plurality ofly and follows aluminium foil layer 311's circumference direction evenly distributed, and heat dissipation strip 312 is transversal to personally submit acute triangle-shaped, and the both sides wall of heat dissipation strip 312 is outside outstanding arc surface, and it has a plurality of heat dissipation archs 313 to go back evenly distributed on the arc surface. The heat dissipation strip 312 is disposed on the outer surface of the aluminum foil layer 311, and the heat dissipation protrusion 313 is disposed on the heat dissipation strip 312, so that the heat on the cable core 1 can be dissipated more quickly.

The above embodiments are only preferred embodiments of the present invention, not all embodiments, and other embodiments obtained based on the above embodiments by those skilled in the art without any creative work shall fall within the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (5)

1. A flame-retardant and high-temperature-resistant cable comprises a cable core (1) formed by twisting a plurality of wires, an inner protective layer (2) and an outer protective layer (3) which are coated on the cable core (1), the method is characterized in that: the inner protection layer (2) comprises a sealing insulating layer (21) of an inner layer and a moisture-proof barrier layer (22) of an outer layer, nylon powder (4) is filled between the cable core (1) and the sealing insulating layer (21), the outer protective layer (3) is sequentially divided into a heat insulation layer (31), an armor layer (32) and an anti-corrosion layer (33) from inside to outside, the thermal insulation layer (31) comprises an inner aluminum foil layer (311) and an outer glass fiber layer, the armor layer (32) is a galvanized steel wire layer coated on the aluminum foil layer (311), the anti-corrosion layer (33) is an LLDPE coating coated on the galvanized steel wire layer.

2. The flame-retardant and high-temperature-resistant cable according to claim 1, wherein: the utility model discloses a heat dissipation strip, including aluminium foil layer (311), heat dissipation strip (312) have along heat dissipation strip (312) that its length direction set up, heat dissipation strip (312) have a plurality ofly and follow the circumference direction evenly distributed of aluminium foil layer (311), the transversal acute triangle-shaped of personally submitting of heat dissipation strip (312), just the both sides wall of heat dissipation strip (312) is outside outstanding arc surface, it has a plurality of heat dissipation archs (313) to go back evenly distributed on the arc surface.

3. The flame-retardant and high-temperature-resistant cable according to claim 1, wherein: the glass fiber layer is composed of an inner glass fiber cloth layer (314), an outer glass fiber cloth layer and a middle glass fiber needling bonding layer, and the total thickness of the two glass fiber cloth layers (314) and the glass fiber needling bonding layer is 3-5 mm.

4. The flame-retardant and high-temperature-resistant cable according to claim 1, wherein: the sealing insulating layer (21) is made of polyvinyl chloride.

5. The flame-retardant and high-temperature-resistant cable according to claim 1, wherein: the moisture-proof barrier layer (22) comprises an outer waterproof layer (221), a middle waterproof layer (222) and an inner breathable layer (223), the waterproof layer (221) is made of super absorbent resin, the waterproof layer (222) is a double-layer non-woven fabric layer, and the breathable layer (223) is a waterproof breathable film layer made of high polymer materials.

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