CN215183227U - Fire-resistant power cable - Google Patents

Abstract

The utility model discloses a fire-resistant power cable, include: the cable comprises a cable core and a plurality of cable cores, wherein each cable core comprises at least one conductor, each conductor is coated with a fire-resistant layer, the fire-resistant layer is coated with an insulating layer, and the periphery of the insulating layer is filled with a halogen-free low-smoke high-flame-retardant filling rope; the oxygen insulation layer is coated on the halogen-free low-smoke high-flame-retardant filling rope; the waterproof layer is coated on the oxygen barrier layer; the fire insulation layer is coated on the waterproof layer; and the outer protective layer is coated on the fire insulation layer. Adopt above-mentioned structure, the cable includes from inside to outside in proper order including conductor, flame retardant coating, insulating layer, the high fire-retardant packing rope of steamed low cigarette, separate oxygen layer, waterproof layer, fire barrier and outer jacket, and rational in infrastructure simple, production is convenient, and the cost is lower relatively, and fire resistance is better, can keep cable run's integrality under the condition of flame burning, continuous vibration and water shower, accords with the fire control operation requirement.

Description

Fire-resistant power cable

Technical Field

The utility model relates to the technical field of cables, in particular to fire-resistant power cable.

Background

With the trend of diversified functions, intensified structure and intensive personnel of modern buildings, new requirements are put on the fire-fighting safety system of the buildings. At present, places such as commercial buildings, office buildings, libraries, hospitals, schools, parking lots and the like sensitive to fire safety have building fire-fighting facilities, wherein the fire-fighting facilities comprise an automatic fire alarm system and an automatic spraying fire-extinguishing system, and fire-resistant cables are required to be used for the fire-fighting facilities. In particular, automatic sprinkler systems are typically deployed along a cable route, which automatically spray water immediately upon sensing a fire to control the situation. The fire-resistant cable has higher requirements on the use occasions, namely, when a fire disaster happens, the cable can still normally work under the condition that the cable is subjected to flame combustion and water spraying, and the normal operation of the whole fire-fighting system is ensured.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a fire-resistant power cable, fire-resistant power cable is rational in infrastructure simple, and it has better fire behavior.

According to the utility model discloses fire-resistant power cable, include: the cable comprises a cable core and a plurality of cable cores, wherein the cable core comprises at least one conductor, each conductor is coated with a fire-resistant layer, the fire-resistant layer is coated with an insulating layer, and halogen-free low-smoke high-flame-retardant filling ropes are filled around the insulating layer; the oxygen insulation layer is coated on the halogen-free low-smoke high-flame-retardant filling rope; the waterproof layer is coated on the oxygen barrier layer; the fire insulation layer is coated on the waterproof layer; and the outer protective layer is coated on the fire insulation layer.

According to the utility model discloses fire-resistant power cable has following beneficial effect at least: adopt above-mentioned structure, the cable includes from inside to outside in proper order including conductor, flame retardant coating, insulating layer, the high fire-retardant packing rope of steamed low cigarette, separate oxygen layer, waterproof layer, fire barrier and outer jacket, and rational in infrastructure simple, production is convenient, and the cost is lower relatively, and fire resistance is better, can keep cable run's integrality under the condition of flame burning, continuous vibration and water shower, accords with the fire control operation requirement.

According to some embodiments of the invention, the conductor is formed for the annealed copper wire transposition.

According to some embodiments of the utility model, the flame retardant coating around wrap in the conductor, the flame retardant coating includes the phlogopite area and is located compound area of ceramic silicon rubber outside the phlogopite area.

According to some embodiments of the present invention, the insulating layer is extruded on the fire-resistant layer, and the insulating layer is a cross-linked polyethylene insulating layer.

According to some embodiments of the present invention, the halogen-free low-smoke high-flame-retardant filler rope comprises glass fiber yarn and inorganic paper rope coated with hydroxide compound.

According to some embodiments of the utility model, the oxygen barrier layer comprises around band and the compound area of ceramic silicon rubber of there is not steamed low cigarette high fire-retardant.

According to some embodiments of the utility model, the waterproof layer around wrap in separate the oxygen layer, the waterproof layer is copper and moulds the composite strip and constitute.

According to some embodiments of the utility model, separate the fire course around wrap in the waterproof layer, separate the fire course by the glass fiber area with there is not steamed low cigarette high fire-retardant around the band constitute.

According to some embodiments of the utility model, the outer jacket crowded package in separate the fire layer, the outer jacket is low smoke and zero halogen fire-retardant sheath material.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a power cable according to an embodiment of the present invention;

reference numerals:

the cable comprises a conductor 10, a fire-resistant layer 20, an insulating layer 30, a halogen-free low-smoke high-flame-retardant filling rope 40, an oxygen-insulating layer 50, a waterproof layer 60, a fire-insulating layer 70 and an outer protective layer 80.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1, according to the utility model discloses fire-resistant power cable, include: the cable core comprises three conductors 10, wherein each conductor 10 is coated with a fire-resistant layer 20, the fire-resistant layer 20 is coated with an insulating layer 30, and the periphery of the insulating layer 30 is filled with a halogen-free low-smoke high-flame-retardant filling rope 40; the oxygen insulation layer 50 is coated on the halogen-free low-smoke high-flame-retardant filling rope 40; a waterproof layer 60 coated on the oxygen barrier layer 50; a fire barrier layer 70 coated on the waterproof layer 60; and an outer sheath 80 covering the fire barrier 70.

It is understood that in some embodiments, the cable core may also include one conductor 10, or more than two conductors 10, or others, which is not limited herein.

According to the utility model discloses fire-resistant power cable adopts above-mentioned structure, and the cable includes conductor 10, flame retardant coating 20, insulating layer 30, the high fire-retardant filling rope of steamed low cigarette 40, separate oxygen layer 50, waterproof layer 60, separate fire layer 70 and outer jacket 80 from inside to outside in proper order, and is rational in infrastructure simple, and production is convenient, and the cost is lower relatively, and fire resistance is better, can keep cable run's integrality under the condition that flame burning, continuous vibration and water sprayed, accords with the fire control operation requirement.

In some embodiments of the present invention, the conductor 10 is formed by stranding annealed copper wires. The corrosion resistance and the oxidation resistance of the copper conductor 10 are improved while the electrical conductivity is ensured.

In some embodiments of the present invention, the fire-resistant layer 20 wraps the conductor 10, and the fire-resistant layer 20 includes the phlogopite tape and the ceramic silicon rubber composite tape outside the phlogopite tape, so as to ensure that the cable can maintain the integrity of the circuit during the combustion process.

It can be understood that the auro-mica tape releases crystal water at a temperature of more than 800 ℃, can reduce the temperature of the conductor 10, has excellent fire resistance, has good electrical insulation performance, and can ensure that the cable still has good electrical insulation among the wire cores under high-temperature combustion; however, the fired auro mica tape is powdery and fragile, a ceramic silicon rubber composite tape is wrapped outside the auro mica tape, the ceramic silicon rubber material is rapidly sintered into a hard ceramic shell under the condition of flameless high temperature above 500 ℃ or flame ablation above 620 ℃, flame is prevented from permeating and burning towards the inside of the cable, heat transfer is prevented, the encrustation can play a role in isolating air, flame spreading is prevented, the fragile auro mica tape can be effectively protected after the ceramic silicon rubber composite tape is encrusted, and the auro mica tape can still keep an integral state under the vibration and spraying conditions.

In the embodiment, the fire-resistant layer 20 is composed of two layers of aureola tapes and one layer of ceramic silicon rubber composite tape, the ceramic silicon rubber composite tape is wrapped outside the aureola tapes, the aureola tapes and the ceramic silicon rubber composite tape are continuously lapped and wrapped, the thickness of the aureola tape is 0.14mm, the lapping rate of the aureola tape is 5% -10%, the thickness of the ceramic silicon rubber composite tape is 0.2mm, and the lapping rate of the ceramic silicon rubber composite tape is 5% -10%.

In some embodiments of the present invention, the insulating layer 30 is extruded on the fire-resistant layer 20, and the insulating layer 30 is a cross-linked polyethylene insulating layer, which has excellent electrical insulating property, and is heat-resistant and not easy to age. The extrusion was performed by extrusion while wrapping.

In a specific embodiment, the average thickness of the insulating layer 30 is 0.7mm to 2.8 mm.

In some embodiments of the present invention, the halogen-free low-smoke high-flame-retardant filler rope 40 comprises glass fiber yarn and inorganic paper rope coated with hydroxide, and the hydroxide is mainly aluminum hydroxide, magnesium hydroxide, etc. Inorganic paper rope and glass fiber yarn are twisted together to form, glass fiber yarn has good flame retardant property, can keep self integrality in flame, and hydroxide coated on the inorganic paper rope can separate out moisture at high temperature, can effectively reduce cable temperature, but inorganic paper is heated and easily embrittles, and when twisted together with glass fiber yarn, the integrality of cable core can be kept when flame burns, and the tight and firm structure of cable is guaranteed not to collapse while preventing flame erosion.

In the specific embodiment, the outer diameter of the halogen-free low-smoke high-flame-retardant filling rope 40 is 3 mm-16 mm.

In some embodiments of the present invention, the oxygen-isolating layer 50 is composed of a halogen-free low-smoke high-flame-retardant wrapping tape and a ceramic silicone rubber composite tape, and the halogen-free low-smoke high-flame-retardant wrapping tape is coated with the ceramic silicone rubber composite tape, so as to improve the fire resistance of the cable. In the embodiment, the oxygen-barrier layer 50 is a layer of halogen-free low-smoke high-flame-retardant wrapping tape and a layer of ceramic silicon rubber composite tape, the thickness of the halogen-free low-smoke high-flame-retardant wrapping tape is 0.2mm, the overlapping rate of the wrapping tape is 10% -20%, the thickness of the ceramic silicon rubber composite tape is 0.2mm, and the overlapping rate of the ceramic silicon rubber composite tape is 5% -10%.

It can be understood that the halogen-free low-smoke high-flame-retardant wrapping tape is composed of a glass fiber woven tape coated with hydroxide compounds, wherein the hydroxide compounds are mainly aluminum hydroxide, magnesium hydroxide and the like. Hydroxide redox produces aqueous vapor during the burning, reduce the temperature at burning position, there is not steamed low cigarette high flame retardant simultaneously and weave the structure can effectively prevent flame along cable axial spread around the glass fiber of area, the compound area of pottery silicon rubber is under the flame ablation more than 500 ℃ flameless high temperature or more than 620 ℃, rapid sintering becomes hard ceramic form casing, prevent flame to the inside infiltration burning of cable, prevent thermal transmission, and can play isolated air's effect behind the crust, prevent that flame from corroding to cable inside, can keep the wholeness when receiving the vibration simultaneously, prevent that spray water from getting into inside the cable.

In some embodiments of the present invention, the waterproof layer 60 is wrapped on the oxygen-isolating layer 50, and the waterproof layer 60 is made of copper-plastic composite tape. When the cable catches fire, the compound area of copper-plastic can prevent flame to the inside burning of cable, and under high temperature, can take place to melt around the plastic layer of lapping the portion and glue in addition, makes whole package of lapping become a inclosed whole, prevents inside the shower water gets into the cable, has improved the anti performance of spraying of cable in flame, prevents that water from getting into inside the cable when the cable burns. In the specific embodiment, the thickness of the waterproof layer 60 is 0.05 mm-0.1 mm, the production mode is continuous lapping and wrapping, and the lapping rate is 20% -25%.

In some embodiments of the present invention, the fire-proof layer 70 is wrapped around the waterproof layer 60, and the fire-proof layer 70 is composed of a glass fiber tape and a halogen-free low-smoke high-flame-retardant wrapping tape. The glass fiber tape can keep the erosion of flame that can be fine in the flame in complete state, and the fluffy characteristic of glass fiber tape also can prevent the temperature to the inside transmission of cable simultaneously, and there is not steamed low cigarette high fire-retardant taped covering is become by the glass fiber braid over braid that scribbles oxyhydrogen compound, and the oxyhydrogen compound is aluminium hydroxide, magnesium hydroxide etc. mainly. The hydrogen hydroxide is oxidized and reduced to generate water vapor during combustion, the temperature of a combustion part is reduced, meanwhile, the halogen-free low-smoke high-flame-retardant glass fiber braided structure of the wrapping tape can effectively prevent flame from axially spreading along a cable, the combustion length of the cable is reduced, the disaster prevention capability of the cable is improved by reducing the combustion, and the cable can effectively run in case of fire; this layer structure can effectually keep apart flame, and the plastic layer of protection waterproof layer 60 can not direct contact flame and zoom, and there is not steamed low cigarette high fire-retardant cable that can effectively tighten around the band simultaneously, makes the cable core compact and level, not only beautifully but also makes things convenient for the crowded package production of follow-up sheath process.

In the specific embodiment, the fire barrier layer 70 is composed of two layers of glass fiber tapes and one layer of halogen-free low-smoke high-flame-retardant wrapping tape, the glass fiber tapes are wrapped with the halogen-free low-smoke high-flame-retardant wrapping tape, the glass fiber tapes and the halogen-free low-smoke high-flame-retardant wrapping tape are continuously lapped and covered, the thickness of the glass fiber tapes is 0.2mm, the covering rate is 10% -15%, the thickness of the halogen-free low-smoke high-flame-retardant wrapping tape is 0.2mm, and the covering rate is 10% -20%.

In some embodiments of the present invention, the outer sheath 80 is extruded on the fire barrier 70, and the outer sheath 80 is a low-smoke halogen-free flame-retardant sheath material. The material has the characteristics of flame retardant property, strong crusting capability at high temperature, low smoke yield and the like, can prevent the fire from spreading under the condition of fire, effectively reduces the impact of flame on the inside of the cable, has good environmental protection performance and facilitates escape of personnel.

In a specific embodiment, the outer sheath 80 has an average thickness of 1.8mm to 3.5 mm.

It should be noted that, in some embodiments of the present invention, the wrapping: the tape is coated on the semi-finished product of the cable in a winding and coating mode, and a certain angle is formed between the tape and the axial direction of the cable during the winding (the tape is generally a high-flame-retardant winding tape, a mica tape and other tape-shaped materials); extruding: the plasticized plastic is extruded and coated on the cable semi-finished product through an extruder (the commonly used extrusion materials are rubber, plastic and the like).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (9)

1. Fire-resistant power cable, characterized in that includes: the cable comprises a cable core and a cable core, wherein the cable core comprises at least one conductor (10), each conductor (10) is coated with a fire-resistant layer (20), the fire-resistant layer (20) is coated with an insulating layer (30), and the periphery of the insulating layer (30) is filled with a halogen-free low-smoke high-flame-retardant filling rope (40);

the oxygen insulation layer (50) is coated on the halogen-free low-smoke high-flame-retardant filling rope (40);

a waterproof layer (60) coated on the oxygen barrier layer (50);

the fire insulation layer (70) is coated on the waterproof layer (60);

and the outer protection layer (80) is coated on the fire insulation layer (70).

2. Fire resistant power cable according to claim 1, characterized in that the conductor (10) is stranded annealed copper wire.

3. The fire-resistant power cable according to claim 1, wherein the fire-resistant layer (20) is wrapped around the conductor (10), the fire-resistant layer (20) comprising a phlogopite tape and a ceramic silicone rubber composite tape outside the phlogopite tape.

4. Fire resistant power cable according to claim 1, characterized in that the insulating layer (30) is extruded around the fire resistant layer (20), the insulating layer (30) being a cross-linked polyethylene insulating layer.

5. Fire resistant power cable according to claim 1, characterized in that the halogen free low smoke high flame retardant filler rope (40) comprises glass fiber filaments and inorganic paper rope coated with hydroxyl compound.

6. Fire-resistant power cable according to claim 1, characterized in that the oxygen barrier layer (50) is composed of a halogen-free low-smoke high-flame-retardant tape and a ceramic silicone rubber composite tape.

7. The fire-resistant power cable according to claim 1, wherein the waterproof layer (60) is wrapped around the oxygen barrier layer (50), and the waterproof layer (60) is formed by a copper-plastic composite tape.

8. The fire-resistant power cable according to claim 1, wherein the fire-barrier layer (70) is wrapped around the waterproof layer (60), and the fire-barrier layer (70) is composed of a glass fiber tape and a halogen-free low-smoke high-flame-retardance wrapping tape.

9. The fire-resistant power cable according to claim 1, wherein the outer sheath (80) is extruded on the fire barrier (70), and the outer sheath (80) is a low-smoke halogen-free flame-retardant sheath material.

Images