CN110416936B - Fireproof explosion-proof heat insulation blanket, cable joint and cable laying structure - Google Patents
Fireproof explosion-proof heat insulation blanket, cable joint and cable laying structure Download PDFInfo
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- CN110416936B CN110416936B CN201910728935.4A CN201910728935A CN110416936B CN 110416936 B CN110416936 B CN 110416936B CN 201910728935 A CN201910728935 A CN 201910728935A CN 110416936 B CN110416936 B CN 110416936B
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 230000009970 fire resistant effect Effects 0.000 claims description 5
- 229920000098 polyolefin Polymers 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
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- YCGKJPVUGMBDDS-UHFFFAOYSA-N 3-(6-azabicyclo[3.1.1]hepta-1(7),2,4-triene-6-carbonyl)benzamide Chemical compound NC(=O)C1=CC=CC(C(=O)N2C=3C=C2C=CC=3)=C1 YCGKJPVUGMBDDS-UHFFFAOYSA-N 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000391 magnesium silicate Substances 0.000 claims description 3
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- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical compound [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
The invention relates to the technical field of safety protection articles, in particular to a fireproof explosion-proof heat insulation blanket, a cable joint and a cable laying structure. The fireproof, explosion-proof and heat-insulating blanket comprises a fireproof layer, a heat-insulating layer, a heat reflection layer and an explosion-proof layer which are sequentially stacked; a plurality of first cavities are arranged between the fireproof layer and the heat insulation layer; each first cavity opening faces the fireproof layer; at least part of the first cavity is internally provided with fire extinguishing powder; the contact side of the explosion-proof layer and the cable or the cable joint is provided with a plurality of second cavities; the opening of each second cavity faces the cable or the cable support. The fireproof and explosion-proof heat insulation blanket can be used for cables or cable joints, and the cables or cable joints coated with the fireproof and explosion-proof heat insulation blanket can effectively reduce the occurrence probability of fire, and can prevent the fire from spreading from one cable to the surrounding cables when the fire occurs.
Description
Technical Field
The invention relates to the technical field of safety protection articles, in particular to a fireproof explosion-proof heat insulation blanket, a cable joint and a cable laying structure.
Background
With the rapid development of power cable buried laying engineering, the higher requirements for cable protection are put forward, the cable is widely applied in various fields, such as large-scale buildings, petrochemical industry, subways, factories, urban power networks and the like, and simultaneously, higher requirements are put forward on the safety of a power system, wherein the fireproof and fire-resistant performances of the power transmission system are crucial, and the existing cable is difficult to prevent fire and resist high temperature no matter the power transmission cable or the communication cable. Particularly in the cable joint part, if the cable joint is in poor contact in the installation process, electric sparks are very easy to generate, so that fire or explosion is caused, and serious safety accidents and economic losses are caused. And further, higher requirements are put forward on the fireproof and flame-proof performances of the cable system.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a fireproof and explosion-proof insulation blanket and a cable laying structure, which are used for solving the problems of fire prevention, poor heat insulation performance and poor impact resistance of the cable in the prior art.
To achieve the above and other related objects, according to one aspect of the present invention, there is provided a fire-proof, explosion-proof, and heat-insulating blanket comprising a fire-proof layer, a heat-insulating layer, and a heat-reflecting layer and an explosion-proof layer, which are sequentially stacked; a plurality of first cavities are arranged between the fireproof layer and the heat insulation layer; each first cavity opening faces the fireproof layer; at least part of the first cavity is internally provided with fire extinguishing powder; the contact side of the explosion-proof layer and the cable body or the cable joint body is provided with a plurality of second cavities; the opening of each second cavity faces to the cable body or the cable connector body.
In some embodiments of the invention, the fire-blocking layer has a thickness of 0.2 to 2mm;
In some embodiments of the invention, the insulating layer has a thickness of 0.5 to 3cm;
in some embodiments of the invention, the thickness of the heat reflective layer is 0.2 to 2mm;
In some embodiments of the invention, the explosion-proof layer has a thickness of 5 to 20mm.
In some embodiments of the invention, the first cavity has a volume of 100cm 3～1000cm3;
In some embodiments of the invention, the volume of the second cavity is 100cm 3～1000cm3;
in some embodiments of the invention, the number of first cavities per unit area is 10 to 25;
in some embodiments of the invention, the number of second cavities per unit area is 10 to 25;
In some embodiments of the invention, the first cavity filled with fire extinguishing powder between the fire-resistant layer and the heat-insulating layer accounts for 70% -100% of the total number of the first cavities between the fire-resistant layer and the heat-insulating layer;
in some embodiments of the invention, the first cavity is a groove structure distributed on the insulating layer.
In some embodiments of the present invention, the material of the fireproof layer is selected from one or more of ceramic rubber glass fiber composite cloth, high silica glass fiber cloth and ceramic polyolefin;
In some embodiments of the invention, the material of the insulating layer is selected from one or more of aerogel blanket, aluminum silicate fiber, ceramic fiber, magnesium silicate fiber, aluminum oxide fiber, fiber blanket, insulating powder;
in some embodiments of the invention, the material of the heat reflective layer is selected from one or more of aluminum foil, stainless steel foil, heat insulating paint;
In some embodiments of the present invention, the material of the explosion-proof layer is selected from one or more of aluminum alloy series blocking explosion-proof materials, aluminum magnesium alloy explosion-suppression explosion-proof materials, polyethylene with molecular weight of more than 150 ten thousand, and poly m-phenylene isophthalamide fiber cloth.
In some embodiments of the present invention, the material of the fire extinguishing powder is selected from one or more of ammonium phosphate salt, sodium bicarbonate, sodium chloride, potassium chloride dry powder fire extinguishing agents.
In some embodiments of the invention, the insulating powder is selected from one or more of aerogel powder, tribological wool, alumina, silica, silicate powder, sulfate powder.
In some embodiments of the invention, the material of the fire-resistant layer is selected from a ceramic silicone rubber glass fiber composite cloth; the material of the heat insulation layer is selected from aerogel felt or aerogel powder; the porosity of the aerogel is 95-98%, the pore diameter is 20-70nm, the pore volume is 3.5ml/g, the material of the explosion-proof layer is selected from polyethylene with the molecular weight of more than 150 ten thousand, and the material of the heat reflection layer is selected from aluminum foil.
In another aspect, the invention provides a cable, which comprises a cable body and at least one layer of fireproof, explosion-proof and heat-insulating blanket, wherein the fireproof, explosion-proof and heat-insulating blanket is coated on the periphery of the cable body, the cable body comprises a plurality of conductors and a cable sheath, insulating layers are coated on the conductors, and a filling layer is filled between the insulating layers and the cable sheath.
In another aspect, the invention provides a cable joint, the cable comprises a cable joint body and at least one layer of fireproof, explosion-proof and heat-insulating blanket, the cable joint is used for connecting two adjacent cable bodies, and the cable joint is positioned between the cable bodies and the fireproof, explosion-proof and heat-insulating blanket.
In another aspect, the present invention provides a cable laying structure, where the cable laying structure includes a cable trench, the cable trench includes a trench body with an opening, a plurality of cable brackets are disposed on a side wall of the trench body, each cable bracket is symmetrically disposed on the side wall of the trench body and is perpendicular to the side wall of the trench body, and the cable bracket is provided with the cable according to the present invention or the cable connector according to the present invention.
Drawings
Fig. 1 is a schematic structural view of the fire-proof explosion-proof heat-insulating blanket of the present invention.
Fig. 2 is a schematic structural view of the cable of the present invention.
Fig. 3 is a schematic structural view of the cable joint of the present invention.
Fig. 4 is a schematic view of a cable laying structure according to the present invention.
In the figure:
1. Cable with improved cable characteristics
11. Fireproof explosion-proof heat insulation blanket
111. Fireproof layer
112. Heat insulation layer
113. Heat reflecting layer
114. Explosion-proof layer
115. First cavity
116. Second cavity
12. Cable body
121. Conductor
122. Filling material
123. Insulating layer
124. Cable sheath
2. Cable joint
21. Cable connector body
3. Cable trench
4. Cable support
Detailed Description
In the description of the present invention, it should be noted that, the structures, proportions, sizes, etc. shown in the drawings attached to the present invention are merely used in conjunction with the disclosure of the present invention, and are not intended to limit the applicable limitations of the present invention, so that any modification of the structures, variation of the proportions, or adjustment of the sizes, without affecting the efficacy and achievement of the present invention, should fall within the scope of the disclosure of the present invention. Also, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1, a first aspect of the present invention provides a fire-proof, explosion-proof, and heat-insulating blanket comprising a fire-proof layer 111, a heat-insulating layer 112, and a heat-reflecting layer 113 and an explosion-proof layer 114, which are sequentially stacked; a plurality of first cavities 115 are arranged between the fireproof layer 111 and the heat insulation layer 112; the opening of each first cavity 115 faces the opening of the fireproof layer 111, and the opening direction of each first cavity 115 gradually increases from the heat insulating layer 112 to the fireproof layer 111; at least a portion of the first cavity 115 is provided with fire extinguishing powder; the contact side of the explosion-proof layer 114 with the cable body or the cable joint body is provided with a plurality of second cavities 116, and the opening of each second cavity 116 faces the cable body or the cable joint body. In the fireproof and explosion-proof heat-insulating blanket provided by the invention, the fireproof layer 111 can play a fireproof role on the internal heat-insulating material, the structural integrity can be ensured, and the heat-insulating layer 112 prevents heat transmission and provides a heat-insulating effect. The heat reflecting layer 113 can effectively prevent heat convection and heat radiation, thereby improving the heat insulation effect of the product. The explosion-proof layer 114 is not deformed and broken under larger impact, so that the structural integrity of the whole fireproof explosion-proof heat-insulating blanket can be maintained, heat and impact propagation can be prevented when the inside or the outside explodes, a plurality of second cavities 116 are arranged on the contact side of the explosion-proof layer 114 and the cable or the cable connector, the second cavities 116 serve as heat dissipation channels and pressure relief channels, and explosion caused by pressure accumulation is prevented, so that an explosion-proof effect is achieved. In addition, the first cavities 115 of the fire-proof layer 111 are filled with fire-extinguishing powder, and when a fire disaster occurs, the fire-proof layer is struck by flame to cause cracks on the surface, and as the opening direction of each first cavity 115 gradually increases from the heat-insulating layer 112 to the fire-proof layer 111, the fire-extinguishing powder wrapped in the first cavities 115 between the fire-proof layer 111 and the heat-insulating layer 112 can be released more easily, and the fire-extinguishing powder falls on a fire source to achieve the effect of extinguishing or slowing down the spread of fire. The first cavity 115, which is not filled with fire extinguishing powder, may be used as a heat dissipation channel to facilitate the heat dissipation of the cable itself. The fireproof and explosion-proof heat insulation blanket obtained through the lamination arrangement of the fireproof layer 111 and the heat insulation layer 112, and the heat reflection layer 113 and the explosion-proof layer 114 can be used for cables or cable joints 2, the cable or the cable joint 2 coated with the fireproof and explosion-proof heat insulation blanket can effectively reduce the probability of fire occurrence, can prevent the fire from spreading to peripheral cables from one cable when the fire occurs, has excellent heat insulation effect, can effectively protect the internal structure of a circuit when the fire occurs, ensures normal power supply of the circuit in a certain time, greatly prolongs rescue time and reduces economic loss.
Further, the fireproof layer 111, the heat insulating layer 112, the heat reflecting layer 113 and the explosion-proof layer 114 are fixed to each other by sewing or bonding.
Further, the first cavities 115 are disposed between the fireproof layer 111 and the heat insulating layer 112, and in general, the fireproof layer 111 directly contacts with the heat source, so that the more the number of the first cavities 115 filled with the fire extinguishing powder, the more the fireproof layer is exposed to the fire to crack the surface, and the more the fire extinguishing powder wrapped in the gap between the fireproof layer 111 and the heat insulating layer 112 is released, the better the fire extinguishing effect. The number of the first cavities 115 filled with the fire extinguishing powder distributed between the fire-preventing layer 111 and the heat-insulating layer 112 can be reasonably controlled, so that fire extinguishment can be ensured in case of fire and heat dissipation of the cable can be realized. The first cavity 115 filled with the fire extinguishing powder between the fire-preventing layer 111 and the heat-insulating layer 112 accounts for 70% -100% of the total number of the first cavities 115 between the fire-preventing layer 111 and the heat-insulating layer 112. The volume of the first cavities 115 is 100cm 3～1000cm3, and the number of the first cavities 115 in a unit area is 10-25. Under the above parameters, a good fire extinguishing and heat radiation effect of the cable or the cable connector 2 can be ensured.
Further, the contact side of the explosion-proof layer 114 and the cable or the cable joint is provided with a plurality of second cavities 116, and the second cavities 116 serve as a heat dissipation channel and a pressure release channel, so that explosion caused by pressure accumulation is prevented, an explosion-proof effect is achieved, and meanwhile, the explosion-proof layer can also serve as a heat dissipation channel of the cable or the cable joint. In some embodiments, some of the second cavities 116 may also be filled with fire extinguishing powder, preventing the fire extinguishing powder in the first cavity 115 from being replenished when it runs out. Typically, the number of second cavities 116 filled with fire extinguishing powder is small, the second cavities being mainly used for heat dissipation of the cable and for protection against explosion caused by pressure build-up. The second cavity 116 filled with the fire extinguishing powder between the explosion-proof layer 114 and the heat insulating layer 112 accounts for 30% or less of the total number of the second cavities 115 between the fire-proof layer 111 and the heat insulating layer 112. The volume of the second cavities 116 is 100cm 3～1000cm3, and the number of the second cavities 116 in a unit area is 10-25. Under the above parameters, the explosion-proof and heat-dissipating effects of the cable or the cable joint 2 can be ensured.
Further, the thickness of the fireproof layer 111 is 0.2-2 mm; the thickness of the heat insulation layer 112 is 0.5-3 cm; the thickness of the heat reflection layer 113 is 0.2-2 mm; the thickness of the explosion-proof layer 114 is 5 to 20mm. Under the above parameters, a good fire-proof, heat-insulating and explosion-proof effect of the cable or the cable joint 2 can be ensured.
Further, the first cavities 115 are groove structures distributed on the heat insulation layer 112, and the plurality of first cavities 115 and the heat insulation layer 112 form a cuboid structure, so that a complete layer structure can be formed with the fireproof layer 111 and the heat insulation layer 112.
In the fireproof and explosion-proof heat-insulating blanket provided by the invention, the fireproof layer 111 is made of one or a combination of a plurality of ceramic rubber glass fiber composite cloth, high silica glass fiber cloth and ceramic polyolefin.
Preferably, the material of the fireproof layer 111 is selected from ceramic silicone rubber glass fiber composite cloth, the ceramic silicone rubber glass fiber composite cloth is formed by calendaring glass fiber cloth and ceramic silicone rubber, wherein the glass fiber cloth is alkali-free glass fiber cloth, the alkali-free glass fiber cloth has excellent insulating property, the glass fiber cloth provides structural strength for the ceramic silicone rubber glass fiber composite cloth, the ceramic silicone rubber takes silicone rubber as a main material, ceramic filler is added, the ceramic can be sintered into ceramic rapidly at the temperature of more than 600 ℃, a layer of compact and firm ceramic body structure is formed on the surface of the material, the ceramic body is firmer when the temperature is higher, and the ceramic body has the advantages of high melting point, high hardness, high wear resistance, oxidation resistance and the like, and can still ensure the stability of the structure at 1500 ℃. Thereby acting to resist the spread of flames to the inner material. Under fire environment, the fireproof layer 111 is quickly sintered into a ceramic-shaped hard shell, and the hard shell armor plays a role in preventing fire of an internal heat insulation material, so that the structural integrity can be ensured.
In the fireproof and explosion-proof heat insulation blanket provided by the invention, the heat conduction coefficient of the material of the heat insulation layer 112 is low, and the heat conduction coefficient of the heat insulation layer 112 is less than or equal to 0.05w/m.k. The material of the thermal insulation layer 112 is specifically selected from one or a combination of more of aerogel felt, aluminum silicate fiber, ceramic fiber, magnesium silicate fiber, aluminum oxide fiber, fiber blanket and thermal insulation powder. The heat insulation powder is selected from one or more of aerogel powder, friction velvet, aluminum oxide, silicon oxide, silicate powder and sulfate powder. The alumina and silica may be spherical. When the material of the heat insulation layer is selected from heat insulation powder, the whole heat insulation layer is that one heat insulation cavity is filled with the heat insulation powder.
Preferably, the thermal insulation layer 112 is selected from aerogel felts, wherein silica aerogel is used as a main material and is compounded in reinforcing fibers, the density of the aerogel felts is less than 220kg/m 3, the heat conductivity coefficient is 0.017-0.023 w/m.k, the pore size is lower than the average free path of air molecules under normal pressure, and therefore, the air molecules are approximately static in the pores of the aerogel, so that the convective heat transfer of air is avoided, the extremely low volume density of the aerogel and the curved path of the nano-network structure also prevent the gaseous and solid heat transfer, and the heat radiation can be minimized by the pore walls which tend to be infinity. The three aspects work together to block almost all paths of heat transfer, so that the aerogel achieves an insulation effect which is incomparable with other materials, and even the thermal conductivity coefficient is far lower than 0.025w/m.k of static air at normal temperature. The aerogel layer has a porosity of 95-98%, a pore diameter of 20-70nm, a specific surface area of 500-650m 2/g, a density of 12.5-18kg/m 3 and a pore volume of 3.5ml/g. The aerogel layer has good heat insulation effect and low density, and can ensure the light weight of the whole structure while ensuring the heat insulation effect.
In the fireproof and explosion-proof heat insulation blanket provided by the invention, the material of the heat reflection layer 113 is selected from one or a combination of a plurality of aluminum foils, stainless steel foils and heat insulation coatings, and the aluminum foils, the stainless steel foils or the heat insulation coatings can effectively prevent heat convection and heat radiation, so that the heat insulation effect of the product is improved. The aluminum foil is selected from Dike aluminum foil heat insulation coiled materials which are formed by laminating aluminum foil veneers, polyethylene films, warp-weft knitted fabrics and metal coating films through a special process and technology. The heat insulating coating is an insulating conduction type heat insulating coating, a reflecting heat insulating coating and a radiation type heat insulating coating, such as Yuzhida YZD-GR01.
In the fireproof and explosion-proof heat-insulating blanket provided by the invention, the explosion-proof layer 114 is selected from explosion-proof materials with high structural strength, and the elastic modulus of the explosion-proof materials is more than 100Gpa and the tensile strength of the explosion-proof materials is more than 1000MPa. The explosion-proof layer 114 is selected from one or a combination of more of aluminum alloy series blocking explosion-proof materials, aluminum magnesium alloy explosion-suppression explosion-proof materials, polyethylene (ultra-high molecular weight polyethylene) with molecular weight more than 150 ten thousand and poly m-phenylene isophthalamide fiber cloth. The structure is a honeycomb net structure, has small gaps, high specific surface area and better heat conductivity in unit volume, and can quickly absorb most of heat released by combustion, so that the final temperature after combustion reaction is greatly reduced. The thickness of the explosion-proof layer is larger than 5mm, and the explosion-proof layer is not deformed and broken under larger impact, so that the structural integrity of the whole fireproof explosion-proof heat-insulating blanket can be maintained, and when explosion occurs inside or outside, the heat and the impact can be prevented from being transmitted, so that the explosion-proof effect is achieved.
In the fireproof and explosion-proof heat insulation blanket provided by the invention, the material of the fire extinguishing powder is selected from one or a combination of more of ammonium phosphate, sodium bicarbonate, sodium chloride and potassium chloride dry powder fire extinguishing agents. The fire extinguishing agents are dry powder fire extinguishing agents, fire extinguishing components in the dry powder fire extinguishing agents are inactive substances of combustion reaction, when the fire extinguishing agents enter flames of a combustion area, free radicals generated by decomposition react with free radicals such as H, OH and the like generated in the combustion reaction of the flames, and the free radicals generated by the combustion reaction are captured and stopped, so that the rate of the combustion reaction is reduced. When the dry powder concentration in the flame is high enough, the contact area with the flame is large enough, and the free radical stopping speed is larger than the burning reaction generating speed, the chained burning reaction is stopped, and the flame is extinguished. The dry powder extinguishing agent is decomposed in the combustion flame in an endothermic manner, and has a better cooling effect because each decomposition reaction is an endothermic reaction. In addition, ammonium dihydrogen phosphate is decomposed at high temperature, and a layer of glassy film residual covering is generated on the surface of the solid substance to cover the surface, so that the effect of isolating oxygen is achieved, combustion is prevented, and afterburning can be prevented. When a fire disaster occurs, the fire-proof layer 111 can generate cracks on the surface under the attack of flame, so that the fire-extinguishing powder wrapped in the cavity 114 between the fire-proof layer 111 and the heat-insulating layer 112 can be released more easily, and the fire-extinguishing powder falls on the fire source to achieve the effect of extinguishing or slowing down the spread of fire.
The second aspect of the present invention provides a cable, as shown in fig. 2, the cable includes a cable body 12 and at least one layer of fireproof, explosion-proof and heat-insulating blanket according to the present invention, the fireproof, explosion-proof and heat-insulating blanket is wrapped around the outer periphery of the cable body 12, more specifically, an explosion-proof layer 114 in the fireproof, explosion-proof and heat-insulating blanket is directly contacted with the cable body 12, the cable body 12 includes a plurality of conductors 121 and a cable sheath 124, the plurality of conductors 121 are wrapped with an insulating layer 123, and a filling layer 122 is filled between the insulating layer 123 and the cable sheath 124. The filler layer 122 is one or a combination of a plurality of ceramic silicone rubber, ceramic polyolefin, glass fiber rope, inorganic paper rope, non-woven fabric and the like. The cable sheath is made of polyvinyl chloride (PVC), polyethylene (PE), perfluoroethylene propylene (F46), nylon, polyolefin and the like. The fireproof and explosion-proof heat insulation blanket can protect the cable from fireproof and heat insulation, so that the situation that the cable is in danger to normal operation due to the fact that the cable generates heat itself in the actual power transmission process or is influenced by external open fire or high temperature in the high-voltage power transmission process, short circuit and circuit occur when the cable is light and serious fire occurs when the cable is heavy can be avoided.
A third aspect of the present invention provides a cable joint 3, as shown in fig. 3, the cable comprising a cable joint body 21 and at least one layer of fire-proof, explosion-proof and heat-insulating blanket according to the present invention, the cable joint body 21 being used for connecting two adjacent cable bodies 12, and the cable joint body 21 being located between the cable bodies 12 and the fire-proof, explosion-proof and heat-insulating blanket, more specifically, the explosion-proof layer 114 in the fire-proof, explosion-proof and heat-insulating blanket being in direct contact with the cable joint body 21. The fireproof explosion-proof heat insulation blanket can protect the cable connector 2 from being fireproof and heat-insulated, so that the situation that breakdown or electric spark is generated due to poor contact of the cable connector 2 or the cable connector is influenced by external open fire or high temperature, threat is caused to normal operation of the cable, short circuit and circuit are caused when the cable is light, and serious fire is caused when the cable is heavy in the actual power transmission process due to self-heating of the cable in the high-voltage power transmission process can be avoided.
A fourth aspect of the present invention provides a cable laying structure, as shown in fig. 4, where the cable laying structure includes a cable trench 3, the cable trench 3 includes a trench body with an opening, a plurality of cable supports 4 are disposed on a sidewall of the trench body, each cable support 4 is symmetrically disposed on the sidewall of the trench body and perpendicular to the sidewall of the trench body, and a cable according to the present invention or a cable connector 2 according to the present invention is disposed on the cable support 4.
In summary, in the invention, the fireproof and anti-explosion heat-insulating blanket is obtained by laminating the fireproof layer 111, the heat-insulating layer 112, the heat-reflecting layer 113 and the anti-explosion layer 114, the fireproof layer 111 can play a fireproof role on the internal heat-insulating material, the structural integrity can be ensured, and the heat-insulating layer 112 prevents heat transmission and provides a heat-insulating effect. The heat reflecting layer 113 can effectively prevent heat convection and heat radiation, thereby improving the heat insulation effect of the product. The explosion-proof layer 114 does not deform and crack under larger impact, so that the structural integrity of the whole fireproof explosion-proof heat insulation blanket can be maintained, when the explosion occurs inside or outside, the heat and impact propagation can be prevented, a plurality of second cavities 116 are arranged on the contact side of the explosion-proof layer 114 and the cable or the cable joint, the second cavities 116 serve as heat dissipation channels and pressure relief channels, and the explosion caused by the accumulation of pressure is prevented, so that the explosion-proof effect is achieved. In addition, the first cavities 115 of the fire-proof layer 111 are filled with fire-extinguishing powder, when a fire disaster occurs, the fire-proof layer is struck by flame to cause cracks on the surface, and the opening direction of each first cavity 115 is gradually increased from the heat-insulating layer 112 to the fire-proof layer 111, so that the fire-extinguishing powder wrapped in the first cavities 115 between the fire-proof layer 111 and the heat-insulating layer 112 can be released more easily, and the fire-extinguishing powder falls on a fire source to achieve the effect of extinguishing or slowing down the spread of fire. The first cavity 115, which is not filled with fire extinguishing powder, may be used as a heat dissipation channel to facilitate the heat dissipation of the cable itself. The fireproof and explosion-proof heat insulation blanket can be used for cables or cable joints 2, the cable or cable joint 2 with the outer layer coated with the fireproof and explosion-proof heat insulation blanket can effectively reduce the probability of fire occurrence, can prevent the fire from spreading from one cable to peripheral cables when the fire occurs, has excellent heat insulation effect, can effectively protect the internal structure of a circuit when the fire occurs, ensures normal power supply of the circuit within a certain time, greatly prolongs rescue time and reduces economic loss.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The fireproof and explosion-proof heat-insulating blanket is characterized by comprising a fireproof layer (111), a heat-insulating layer (112), a heat reflecting layer (113) and an explosion-proof layer (114) which are sequentially stacked;
a plurality of first cavities (115) are arranged between the fireproof layer (111) and the heat insulation layer (112);
each first cavity (115) is opened towards the fireproof layer (111);
at least part of the first cavity (115) is internally provided with fire extinguishing powder;
the contact side of the explosion-proof layer (114) and the cable body or the cable joint body is provided with a plurality of second cavities (116);
the opening of each second cavity (116) faces the cable body or the cable connector body.
2. Fire and explosion protection heat insulation blanket according to claim 1, characterized in that the thickness of the fire-resistant layer (111) is 0.2-2 mm;
and/or the thickness of the heat insulation layer (112) is 0.5-3 cm;
and/or the thickness of the heat reflection layer (113) is 0.2-2 mm;
And/or the thickness of the explosion-proof layer (114) is 5-20 mm.
3. The fire and explosion protection blanket according to claim 1, wherein the first cavity (115) has a volume of 100cm 3～1000cm3;
and/or the volume of the second cavity (116) is 100cm 3～1000cm3;
And/or the number of the first cavities (115) in the unit area is 10-25;
And/or the number of the second cavities (116) in the unit area is 10-25;
And/or, the first cavity (115) filled with fire extinguishing powder between the fire-proof layer (111) and the heat-insulating layer (112) accounts for 70% -100% of the total number of the first cavities (115) between the fire-proof layer (111) and the heat-insulating layer (112);
And/or the first cavity (115) is a groove structure distributed on the heat insulation layer (112).
4. The fireproof and explosion-proof heat insulation blanket according to claim 1, wherein the material of the fireproof layer (111) is selected from one or more of ceramic rubber glass fiber composite cloth, high silica glass fiber cloth and ceramic polyolefin;
And/or the material of the heat insulation layer (112) is selected from one or a combination of more of aerogel felt, aluminum silicate fiber, ceramic fiber, magnesium silicate fiber, aluminum oxide fiber, fiber blanket and heat insulation powder;
and/or the material of the heat reflection layer (113) is selected from one or a combination of a plurality of aluminum foils, stainless steel foils and heat insulation paint;
And/or the material of the explosion-proof layer (114) is selected from one or a combination of more than one of aluminum alloy series blocking explosion-proof materials, aluminum magnesium alloy explosion-suppression explosion-proof materials, polyethylene with molecular weight more than 150 ten thousand and poly m-phenylene isophthalamide fiber cloth.
5. The fire-proof and explosion-proof heat-insulating blanket according to claim 1, wherein the material of the fire-extinguishing powder is selected from one or a combination of more of ammonium phosphate salt, sodium bicarbonate, sodium chloride and potassium chloride dry powder fire-extinguishing agents.
6. The fire and explosion protection blanket of claim 4, wherein the insulation powder is selected from one or more of aerogel powder, friction wool, alumina, silica, silicate powder, sulfate powder.
7. Fire-proof and explosion-proof heat-insulating blanket according to claim 4 or 6, characterized in that the material of the fire-proof layer (111) is selected from ceramic silicone rubber glass fiber composite cloth; the material of the heat insulation layer (112) is selected from aerogel felt or aerogel powder; the porosity of the aerogel is 95-98%, the pore diameter is 20-70nm, the pore volume is 3.5ml/g, the material of the explosion-proof layer (114) is selected from polyethylene with the molecular weight of more than 150 ten thousand, and the material of the heat reflecting layer (113) is selected from aluminum foil.
8. Cable, characterized in that the cable comprises a cable body (12) and at least one layer of fire-proof, explosion-proof and heat-insulating blanket according to any one of claims 1 to 7, the fire-proof, explosion-proof and heat-insulating blanket is wrapped around the cable body (12), the cable body (12) comprises a plurality of conductors (121) and a cable sheath (124), the plurality of conductors (121) are wrapped with insulating layers (123), and a filling layer (122) is filled between the insulating layers (123) and the cable sheath (124).
9. Cable joint, characterized in that the cable comprises a cable joint body (21) and at least one layer of fire-proof, explosion-proof and heat-insulating blanket according to any of claims 1-7, the cable joint (2) being intended to connect two adjacent cable bodies (12), and the cable joint (2) being situated between the cable bodies (12) and the fire-proof, explosion-proof and heat-insulating blanket.
10. A cable laying structure, characterized in that the cable laying structure comprises a cable trench (3), the cable trench (3) comprises a trench body with an opening, a plurality of cable supports (4) are arranged on the side wall of the trench body, each cable support (4) is symmetrically arranged on the side wall of the trench body and is perpendicular to the side wall of the trench body, and a cable according to claim 8 or a cable connector (2) according to claim 9 is arranged on the cable support (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910728935.4A CN110416936B (en) | 2019-08-08 | Fireproof explosion-proof heat insulation blanket, cable joint and cable laying structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910728935.4A CN110416936B (en) | 2019-08-08 | Fireproof explosion-proof heat insulation blanket, cable joint and cable laying structure |
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| Publication Number | Publication Date |
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| CN110416936A CN110416936A (en) | 2019-11-05 |
| CN110416936B true CN110416936B (en) | 2024-06-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210536201U (en) * | 2019-08-08 | 2020-05-15 | 常州市沃科科技有限公司 | Fireproof and explosion-proof heat insulation blanket, cable joint and cable laying structure |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210536201U (en) * | 2019-08-08 | 2020-05-15 | 常州市沃科科技有限公司 | Fireproof and explosion-proof heat insulation blanket, cable joint and cable laying structure |
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