CN210403330U

CN210403330U - Medium-voltage fireproof cable with monitoring function

Info

Publication number: CN210403330U
Application number: CN201921835454.5U
Authority: CN
Inventors: 程斌; 张林锐; 华健; 华洪彬
Original assignee: Wuxi Huamei Cable Co ltd
Current assignee: Wuxi Huamei Cable Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-04-24
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a medium-voltage fireproof cable with a monitoring function, which belongs to the field of cable manufacturing and is divided into a single-core cable and a multi-core cable; when the cable is single core, by skin to inlayer in proper order be: the temperature sensing optical fiber comprises an outer sheath, a first fireproof layer, a heat dispersion layer, a second fireproof layer, a heat buffer layer, a temperature sensing optical fiber and an insulating wire core; when the cable is a multi-core cable, the cable sequentially comprises the following layers from the outer layer to the inner layer: the heat insulation structure comprises an outer sheath, a first fireproof layer, a heat dispersion layer, a second fireproof layer, a heat buffer layer, a temperature sensing optical fiber, flame retardant filling and a plurality of insulation wires; the utility model discloses a product has higher fire behavior and has monitor function concurrently, and environmental suitability is strong, green, and the security performance is superior.

Description

Medium-voltage fireproof cable with monitoring function

Technical Field

The utility model belongs to the manufacturing field of cable specifically is a take monitoring function's green middling pressure fireproof cable.

Background

With the increasing demand for fire protection, the medium voltage distribution system is applied to important places such as high-rise buildings, exhibition centers, subways, power plants, nuclear power stations, tunnels and the like.

At present, a fire insulation layer or an oxygen insulation layer is added to a common medium-voltage fireproof cable on the basis of a medium-voltage cross-linked cable, so that the cable forms an oxygen-deficient environment to achieve flame retardance, and a fire-resistant function is achieved. The structure usually adopts a large amount of glass fibers or rock wool ropes, is not environment-friendly and has the moisture absorption phenomenon, so that the oxidation corrosion of metal shielding is caused, and hidden troubles are brought to the operation of the circuit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the not enough of existence among the prior art, provide a take monitoring function's green middling pressure fireproof cable, through setting up metallic shield, insulation, conductor shield, temperature sensing optic fibre, conductor, have good fire prevention fire resistance and have monitoring function, solved the hidden danger problem of circuit operation among the prior art.

The utility model discloses a realize like this:

the utility model discloses a medium voltage fireproof cable with monitoring function, which is divided into a single-core cable and a multi-core cable; the single-core cable sequentially comprises an outer sheath, a first fireproof layer, a heat dispersion layer, a second fireproof layer, a heat buffer layer and an insulating wire core from outside to inside, wherein the insulating wire core in the single-core cable is a single wire; and a temperature sensing optical fiber is arranged between the thermal buffer layer and the insulated wire core in the single-core cable.

The multi-core cable sequentially comprises an outer sheath, a first fireproof layer, a heat dispersion layer, a second fireproof layer, a heat buffer layer and insulated wire cores from outside to inside, wherein a plurality of insulated wire cores are arranged in the multi-core cable; temperature sensing optical fibers are arranged between the thermal buffer layer and the insulated wire cores in the multi-core cable; the insulated wire cores in the multi-core cable are formed by twisting a plurality of insulated wire cores, and flame-retardant filling and twisting are applied among the plurality of insulated wire cores to form a cable;

the temperature sensing optical fiber in the medium-voltage fireproof cable is a non-metal high-temperature-resistant temperature sensing optical cable, the long-term measurement temperature is-45-250 ℃, and the short-term temperature is-50-300 ℃. The nonmetal high-temperature resistant temperature sensing optical cable has the long-term measurement temperature of-45-250 ℃ and the short-term temperature of-50-300 ℃, and can realize line overheating alarm and power failure so as to avoid electric short circuit and other fires.

Furthermore, the number of the insulated wire cores in the multi-core cable is three.

Furthermore, the conductor of the insulated wire core is composed of copper-based multi-strand metal wires.

Further, the first fireproof layer is made of a high-flame-retardant halogen-free material. The first fireproof layer is made of a high-flame-retardant halogen-free material and aims to: when fire occurs, the flame can be prevented from penetrating inwards, and the inside of the fire is protected.

Furthermore, the heat dispersion layer is a metal band cladding, and the metal band cladding realizes heat conduction and dispersion. The heat dispersion layer is a metal belt cladding, so that the rapid conduction and dispersion of heat can be realized, the rapid temperature rise of local points is avoided, and the protection is formed on the inside.

Further, the second fireproof layer is made of ceramic halogen-free materials; the ceramic halogen-free material is ceramic polyolefin, and the ceramic polyolefin forms a ceramic shell at the temperature of more than 350 ℃. The ceramic-shaped shell can protect the interior of the cable in a high-temperature state.

Further, the thermal buffer layer is an inorganic mineral belt; the inorganic mineral belt is a glass fiber belt. The glass fiber belt with small heat conduction can delay the transmission of external heat and form protection to the inside.

Further, the outer sheath is made of a halogen-free low-smoke flame-retardant material; the halogen-free low-smoke flame-retardant material is a thermoplastic halogen-free low-smoke flame-retardant sheath material. The thermoplastic halogen-free low-smoke flame-retardant sheath material can preliminarily block the spread of flame and protect the inside.

The utility model discloses with prior art's beneficial effect lie in:

1) the cable product performance of the utility model can meet the requirements of fire resistance, impact and water spray tests specified by BS8491:2008, thereby not only meeting the requirements of electrical and mechanical properties of the cable, but also having good fire resistance and fire resistance; in addition, the cable has a monitoring function, the running state can be monitored, and meanwhile, all materials of the product are green and environment-friendly materials, so that secondary damage caused by fire can be avoided.

2) The utility model discloses overall structure sets up rationally, not only can realize the transmission of electric energy to can realize the control of cable running state, applyed multilayer fire-retardant, flame retardant coating in addition, make cable product environmental adaptability stronger, the security performance is more superior, reliable, and its cable product is green product, also accords with industry development direction.

Drawings

Fig. 1 is a schematic structural diagram of a single-core cable of the present invention;

fig. 2 is a schematic structural diagram of the multi-core cable of the present invention;

the thermal insulation material comprises, by weight, 1-an outer sheath, 2-a first fireproof layer, 3-a thermal dispersion layer, 4-a second fireproof layer, 5-a thermal buffer layer, 6-a temperature-sensitive optical fiber, 7-an insulation wire core and 8-flame-retardant filling.

Detailed Description

In order to make the purpose, technical solution and effect of the present invention clearer and more clear, it is clear that the following list examples are to the present invention for further detailed description. It should be noted that the embodiments described herein are only for explaining the present invention and are not used to limit the present invention.

As shown in figure 1, a single core cable, outside-in is oversheath 1, first flame retardant coating 2, thermal dispersion layer 3, second flame retardant coating 4, thermal buffer layer 5, insulating sinle silk 7 in proper order, single core cable in insulating sinle silk 7 set up to single. An insulating wire core 7 of the single-core cable is wrapped with a thermal buffer layer 5 and provided with a temperature sensing optical fiber 6, then is extruded with a second fireproof layer 4, and is provided with a thermal dispersion layer 3, and then is sequentially provided with a second fireproof layer 42 and an outer sheath 1. The utility model discloses a single core cable forms metallic shield, insulation, conductor shield, conductor from outside to inside in proper order.

As shown in fig. 2, the multi-core cable of the present invention comprises an outer sheath 1, a first flame retardant layer 2, a heat dispersion layer 3, a second flame retardant layer 4, a heat buffer layer 5, and insulated wire cores 7 from outside to inside, wherein the number of the insulated wire cores 7 in the multi-core cable is several; a temperature sensing optical fiber 6 is arranged between the thermal buffer layer 5 and the insulated wire core 7 in the multi-core cable; the insulated wire cores 7 in the multi-core cable are formed by twisting three insulated wire cores, and flame-retardant filling 8 is applied among the three insulated wire cores to form the cable in a twisting mode. The insulated wire core 7 of the multi-core cable comprises a metal shield, an insulated shield, an insulator, a conductor shield and a conductor in sequence from outside to inside.

The common setting among single core cable and the multicore cable lies in: the temperature sensing optical fiber 6 is a non-metal high-temperature resistant temperature sensing optical cable, the long-term measurement temperature is-45-250 ℃, the short-term temperature is-50-300 ℃, and the circuit overheating alarm and power failure can be realized so as to avoid electric short circuit and other fires; the first fireproof layer 2 is made of high-flame-retardant halogen-free material. The material can prevent the flame from penetrating inwards in case of fire, and protect the inside. The heat dispersion layer is a metal belt cladding, so that the rapid conduction and dispersion of heat can be realized, the rapid temperature rise of local points is avoided, and the protection is formed on the inside. The second fireproof layer 4 is made of ceramic halogen-free material, specifically ceramic polyolefin, and can form a ceramic shell at a temperature of more than 350 ℃ to protect the inside. The thermal buffer layer is an inorganic mineral belt, particularly a glass fiber belt with small heat conduction, and can delay the transmission of external heat and protect the inside. The outer sheath is a halogen-free low-smoke flame-retardant material, in particular a thermoplastic halogen-free low-smoke flame-retardant sheath material, primarily blocks the spread of flame, and protects the inside.

Will the utility model discloses a single core cable and multicore cable are tested: the test is fired the temperature and is 830 ~ 870 ℃, under the 120min fire resistance test condition, can stand 12 impact and 3 water spray tests that can stand simultaneously of fire resistance test, show that the product property ability of the utility model discloses a product can satisfy the fire resistance, impact and the water spray test requirement that BS8491:2008 stipulates.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. A medium-voltage fireproof cable with a monitoring function is characterized in that the medium-voltage fireproof cable is divided into a single-core cable and a multi-core cable; the single-core cable sequentially comprises an outer sheath (1), a first fireproof layer (2), a heat dispersion layer (3), a second fireproof layer (4), a heat buffer layer (5) and an insulating wire core (7) from outside to inside, wherein the insulating wire core (7) in the single-core cable is single; a temperature sensing optical fiber (6) is arranged between the thermal buffer layer (5) and the insulated wire core (7) in the single-core cable;

the multi-core cable sequentially comprises an outer sheath (1), a first fireproof layer (2), a heat dispersion layer (3), a second fireproof layer (4), a heat buffer layer (5) and insulated wire cores (7) from outside to inside, wherein the number of the insulated wire cores (7) in the multi-core cable is multiple; a temperature sensing optical fiber (6) is arranged between the thermal buffer layer (5) and the insulated wire core (7) in the multi-core cable; the insulated wire cores (7) in the multi-core cable are formed by twisting a plurality of insulated wire cores, and flame-retardant filling (8) is applied among the insulated wire cores to twist the insulated wire cores into a cable;

the temperature sensing optical fiber (6) in the medium-voltage fireproof cable is a non-metal high-temperature-resistant temperature sensing optical cable, the long-term measurement temperature is-45-250 ℃, and the short-term temperature is-50-300 ℃.

2. The medium voltage fireproof cable with monitoring function according to claim 1, wherein the number of the insulated wire cores (7) in the multi-core cable is three.

3. Medium voltage fireproof cable with monitoring function according to claim 1, wherein the conductor of the insulated wire core (7) is made of copper-based multi-strand wire.

4. The medium-voltage fireproof cable with the monitoring function according to claim 1, wherein the first fireproof layer (2) is made of a high-flame-retardant halogen-free material.

5. The medium voltage fireproof cable with monitoring function according to claim 1, wherein the heat dissipation layer (3) is a metal clad layer, and the metal clad layer realizes heat conduction and dissipation.

6. The medium-voltage fireproof cable with the monitoring function according to claim 1, wherein the second fireproof layer (4) is a ceramic halogen-free material; the ceramic halogen-free material is ceramic polyolefin, and the ceramic polyolefin forms a ceramic shell at the temperature of more than 350 ℃.

7. The medium voltage fireproof cable with monitoring function according to claim 1, wherein the thermal buffer layer (5) is an inorganic mineral tape; the inorganic mineral belt is a glass fiber belt.

8. The medium-voltage fireproof cable with the monitoring function according to claim 1, wherein the outer sheath (1) is a halogen-free low-smoke flame-retardant material; the halogen-free low-smoke flame-retardant material is a thermoplastic halogen-free low-smoke flame-retardant sheath material.