CN113889962A - Fireproof and explosion-proof protection structure for intermediate joint of high-voltage cable - Google Patents
Fireproof and explosion-proof protection structure for intermediate joint of high-voltage cable Download PDFInfo
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- CN113889962A CN113889962A CN202111007037.3A CN202111007037A CN113889962A CN 113889962 A CN113889962 A CN 113889962A CN 202111007037 A CN202111007037 A CN 202111007037A CN 113889962 A CN113889962 A CN 113889962A
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Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fireproofing Substances (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a fireproof and explosion-proof protection structure for a high-voltage cable intermediate joint, which comprises a hollow box body with openings at two ends, wherein an explosion-proof layer, a heat absorption layer and a graphene rubber layer are sequentially arranged on the inner wall of the hollow box body. The explosion-proof layer is made of polypropylene fibers, stainless steel fibers and aramid fibers. The heat absorption layer comprises two polymer matrix layers and an expandable graphite layer arranged between the two polymer matrix layers; the polymer matrix layer is prepared from porous polysulfone material and heat-absorbing particles. The high-voltage cable intermediate joint fireproof and explosion-proof protection structure is reasonable in functional structure design, excellent in fireproof and explosion-proof performance and capable of effectively protecting the high-voltage cable intermediate joint.
Description
Technical Field
The invention relates to the technical field of electric power facilities, in particular to a fireproof and explosion-proof protection structure for a high-voltage cable intermediate joint.
Background
The electric wire and the cable are carriers for electric power transmission, and with the development of a social electric power system, on one hand, a large number of traditional cables, pipelines and underground public facility buildings on the ground cause that the underground space is crowded as much as the ground; on the other hand, the power cable bears a huge energy transmission function in operation, once a short-circuit fault occurs, huge energy can be released instantaneously at a fault point, and the physical processes of electrostatic radiation, electromagnetic radiation, thermal radiation and pressure radiation are accompanied. These physical processes inevitably cause various disasters such as electromagnetic interference, burning, explosion and the like, and under the condition of narrow space, various radiations and disasters caused by the radiations can cause serious damage to other articles and personnel in the surrounding environment. Therefore, the design of the fireproof and explosion-proof protection structure of the cable is urgently needed by a power system, and the fireproof and explosion-proof protection structure of the cable can avoid electric power paralysis accidents caused by large-area cable damage caused by part of electric fires.
Disclosure of Invention
Therefore, a fireproof and explosion-proof protection structure for the intermediate joint of the high-voltage cable with a good protection effect is needed to be provided.
In one aspect of the present invention, there is provided a fire and explosion protection structure for a middle joint of a high voltage cable, comprising:
the box comprises a hollow box body, wherein openings are formed in two ends of the hollow box body;
an explosion-proof layer, a heat absorption layer and a graphene rubber layer are sequentially arranged on the inner wall of the hollow box body from outside to inside, wherein the explosion-proof layer is made of polypropylene fibers, stainless steel fibers and aramid fibers;
the heat absorbing layer comprises at least two polymer matrix layers and an expandable graphite layer arranged between two adjacent polymer matrix layers; the preparation raw materials of the polymer matrix layer comprise a porous polysulfone material and heat-absorbing particles.
In some embodiments, the raw materials for preparing the graphene rubber layer comprise rubber, graphene, zinc oxide and a coagulant.
In some embodiments, the preparation method of the graphene rubber layer comprises the following steps:
preparing a rubber solution with the solid content of 40-60%;
mixing graphene and a sodium tripolyphosphate solution, then adding zinc oxide, and mixing to obtain a graphene mixed solution, wherein the mass ratio of the graphene to the zinc oxide is 1 (0.5-1.5);
and mixing the rubber solution, the graphene mixed solution and a coagulant, foaming, pouring into a mould and steaming.
In some embodiments, the preparation method of the porous polysulfone material comprises the following steps:
taking the mass ratio of polysulfone to polyethylene glycol as (0.5-1): 1, preparing a solution by using the polysulfone grafted polyethylene glycol copolymer;
stirring the solution at room temperature for 1-2 h;
heating to 70-80 ℃, and stirring the solution for 0.3-0.5 h;
cooling to 40-45 ℃, and standing for 18-20 h;
filtering and screening out particles in the solution, and drying the particles at 40-60 ℃ for 2-3 h.
In some of these embodiments, the endothermic particles are selected from at least one of ammonium oxalate particles, sodium silicate particles, lauric acid particles, and palmitic acid particles.
In some of these embodiments, the method of preparing the polymer matrix layer comprises:
and mixing the porous polysulfone material, the heat-absorbing particles and the solvent to form a blended liquid, heating and evaporating, and extruding and molding.
In some embodiments, the hollow box body is composed of a first box body, a second box body and a connecting piece; the first box body and the second box body are connected through the connecting piece to form the hollow box body.
In some embodiments, the connecting member includes a hinge and a latch respectively disposed on opposite sides of the first container and the second container.
In some embodiments, a sealing strip is arranged at the joint of the peripheries of the first box body and the second box body.
In some of these embodiments, the outer surface of the hollow box is sprayed with a fire retardant layer.
The inner wall of the hollow box body of the fireproof and explosion-proof protection structure for the middle joint of the high-voltage cable is sequentially provided with an explosion-proof layer, a heat absorption layer and a graphene rubber layer, and the explosion-proof layer can bear and block impact force when explosion occurs inside or outside the box body, so that a good explosion-proof effect is achieved; the polymer matrix layer and the expandable graphite layer of the heat absorption layer can absorb heat generated by combustion or explosion, and further development and deterioration of the combustion or explosion are prevented; the graphene rubber layer is made of elastic materials, can wrap the middle joint of the high-voltage cable, and effectively prevents electric sparks generated inside from causing combustion. The high-voltage cable intermediate joint fireproof and explosion-proof protection structure is reasonable in functional structure design, excellent in fireproof and explosion-proof performance and capable of effectively protecting the high-voltage cable intermediate joint.
Drawings
Fig. 1 is a front view of a schematic structural diagram of a fire and explosion protection structure of a high-voltage cable intermediate joint according to an embodiment of the invention;
fig. 2 is a side view of a schematic structural diagram of a fire and explosion protection structure of a high-voltage cable intermediate joint according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a first box of a fireproof and explosion-proof protection structure of a high-voltage cable intermediate joint according to an embodiment of the invention;
fig. 4 is a schematic cross-sectional structural view of a fireproof and explosion-proof protection structure of a high-voltage cable intermediate joint according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a heat absorbing layer in a fireproof and explosion-proof protection structure of a high-voltage cable intermediate joint according to an embodiment of the invention;
reference numerals: 100. a hollow box body; 101. a first case; 200. a connecting member; 201. a hinge; 202. locking; 300. an explosion-proof layer; 400. a heat absorbing layer; 401. a polymer matrix layer; 402. an expandable graphite layer; 500. a graphene rubber layer; 600. a high voltage cable intermediate joint; 700. a sealing strip.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 5, an embodiment of the present invention provides a fire and explosion protection structure for a high voltage cable intermediate connector 600, including: a hollow cartridge 100. The hollow case 100 is provided with openings at both ends. The inner wall of the hollow box 100 is provided with an explosion-proof layer 300, a heat absorption layer 400 and a graphene rubber layer 500 in sequence from the outside to the inside.
The explosion-proof layer 300 is made of polypropylene fibers, stainless steel fibers and aramid fibers. The polypropylene fiber is a synthetic fiber spun by taking isotactic polypropylene obtained by propylene polymerization as a raw material, and has the advantages of high strength, good toughness, chemical resistance and the like; the stainless steel fiber is a novel industrial material, and has the properties of high heat conductivity, high strength, high temperature resistance and the like, and also has excellent flexibility and elasticity; the aramid fiber has the properties of ultrahigh strength, high modulus, high temperature resistance, acid and alkali resistance and the like. The explosion-proof layer 300 made of the materials has good flexibility, high mechanical strength and good high-temperature resistance, can bear impact force when explosion occurs, and plays a good explosion-proof role.
The heat sink layer 400 includes at least two polymer matrix layers 401 and an expandable graphite layer 402 disposed between adjacent polymer matrix layers 401; the polymer matrix layer 401 is prepared from porous polysulfone material and heat-absorbing particles. The polymer matrix layer 401 in the heat absorption layer 400 comprises a porous polysulfone material and heat absorption particles, the heat absorption particles are embedded in micropores of the porous polysulfone or attached to the surface of the porous polysulfone, the porous polysulfone material has good heat resistance, corrosion resistance and insulation performance, and can absorb a large amount of heat by combining with the heat absorption particles to avoid rapid temperature rise; the expandable graphite layer 402 in the heat absorbing layer 400 can absorb a large amount of heat during the expansion process, and can physically block oxygen to prevent combustion from spreading. In addition, the polymer matrix layer 401 has certain elasticity, can absorb certain stress and is not easy to damage. Because the heat absorbing particles can be embedded into the micropores of the porous polyether, even if the heat absorbing particles are damaged, the heat absorbing particles cannot be greatly lost to influence the heat absorbing effect.
The inner wall of the hollow box body 100 of the fireproof and explosion-proof protection structure of the high-voltage cable intermediate joint 600 is sequentially provided with the explosion-proof layer 300, the heat absorption layer 400 and the graphene rubber layer 500, and the explosion-proof layer 300 can bear and block impact force when explosion occurs inside or outside the box body, so that a good explosion-proof effect is achieved; the polymer matrix layer 401 and the expandable graphite layer 402 of the heat absorbing layer 400 can absorb heat generated by combustion or explosion, and further development and deterioration of the combustion or explosion are prevented; the graphene rubber layer 500 is made of an elastic material, can wrap the high-voltage cable intermediate joint 600, and effectively prevents electric sparks generated inside from causing combustion. Above-mentioned high tension cable intermediate head 600 fire prevention explosion-proof protection architecture's functional structure reasonable design, fire prevention explosion-proof performance is good, can effectively protect high tension cable intermediate head 600.
In some of these embodiments, the heat sink layer 400 is comprised of two polymer matrix layers 401 and an expandable graphite layer 402 disposed between the two polymer matrix layers 401.
In some of the embodiments, the raw materials for preparing the graphene rubber layer 500 include rubber, graphene, zinc oxide and a coagulant.
In some of the embodiments, the preparation method of the graphene rubber layer 500 includes the following steps (1) to (3).
(1) Preparing a rubber solution with the solid content of 40-60%.
(2) Mixing graphene and a sodium tripolyphosphate solution, then adding zinc oxide, and mixing to obtain a graphene mixed solution, wherein the mass ratio of the graphene to the zinc oxide is 1 (0.5-1.5).
(3) Mixing the rubber solution, the graphene mixed solution and the coagulant, foaming, pouring into a mould and steaming.
In some of these embodiments, the rubber solution has a solids content of 50%.
In some embodiments, the mass ratio of the graphene to the zinc oxide in the graphene mixed solution is 1: 1.
In some embodiments, the mass ratio of the rubber solution to the graphene mixed solution to the coagulant is 20:1: 0.5.
In some embodiments, the preparation method of the porous polysulfone material comprises the following steps (1) to (5).
(1) Taking the mass ratio of polysulfone to polyethylene glycol as (0.5-1): 1, preparing a solution by the polysulfone grafted polyethylene glycol copolymer.
(2) The solution is stirred for 1 to 2 hours at room temperature.
(3) The temperature is raised to 70 ℃ to 80 ℃, and the solution is stirred for 0.3h to 0.5 h.
(4) Cooling to 40-45 deg.c and letting stand for 18-20 hr.
(5) Filtering and screening out particles in the solution, and drying the particles at 40-60 ℃ for 2-3 h.
The porous polysulfone prepared by the method contains grafted polyethylene glycol, the polyethylene glycol belongs to a low-temperature phase change compound, phase change can occur after the ambient temperature rises to a certain degree, and the polyethylene glycol has a large phase change enthalpy value and further has certain heat absorption capacity, so that the heat absorption layer 400 has improved heat absorption performance.
In some of these embodiments, the endothermic particles are selected from at least one of ammonium oxalate particles, sodium silicate particles, lauric acid particles, and palmitic acid particles.
In some of these embodiments, the method of preparing the polymer matrix layer 401 includes: mixing the porous polysulfone material, the heat-absorbing particles and the solvent to form a blended liquid, heating and evaporating, and extruding and molding.
In some of these embodiments, the solvent is selected from at least one of water, ethanol, methanol, and isopropanol.
In some embodiments, the hollow box 100 is composed of a first box 101, a second box and a connector 200; the first container 101 and the second container are connected by a connector 200 to form a hollow container 100.
In some embodiments, the first box 101 and the second box are half boxes, and are connected by a connector 200 to form a hollow box 100.
In some embodiments, the connecting member 200 includes a hinge 201 and a latch 202 disposed on opposite sides of the first container 101 and the second container, respectively. Through hinge 201 and hasp 202, can realize opening and shutting of cavity box 100, the installation of the fire prevention explosion-proof protection architecture of being convenient for is dismantled.
In some embodiments, a sealing strip 700 is disposed at the joint of the peripheries of the first box 101 and the second box. The sealing strip 700 is arranged to ensure the connection tightness of the first box body 101 and the second box body, and the fireproof and explosion-proof protection structure is further improved to prevent fire of the high-voltage cable intermediate joint 600.
In some of these embodiments, the outer surface of the hollow box 100 is coated with a fire retardant layer. The fireproof flame-retardant layer sprayed on the surface of the hollow box body 100 can effectively improve the insulation and high-temperature resistance of the box body and block the spread of the combustion fire of the internal or external high-voltage cable.
The fire-proof and explosion-proof protection structure of the high-voltage cable intermediate joint is further described by the specific embodiment.
Example 1:
a fireproof and explosion-proof protection structure for a high-voltage cable intermediate joint comprises two half box bodies and a connecting piece for connecting the two half box bodies, wherein the two half box bodies form a hollow box body with openings at two ends; the explosion-proof layer is woven by polypropylene fibers, stainless steel fibers and aramid fibers; the heat absorption layer is made of two polymer matrix layers and an expandable graphite layer clamped between the two polymer matrix layers, and the polymer matrix layer is made of a porous polysulfone material, heat absorption particles and a solvent.
The preparation method of the porous polysulfone material comprises the following steps:
1) preparing a polysulfone grafted polyethylene glycol copolymer with the mass ratio of polysulfone to polyethylene glycol of 0.5:1 into a solution, stirring at normal temperature for 1h, then heating to 70 ℃, stirring for 0.5h, finally cooling to 40 ℃, and standing for 18 h;
2) and screening out particles in the solution, and drying at 40 ℃ for 3 hours to obtain the porous polysulfone material.
The heat absorbing particles are ammonium oxalate particles.
The preparation method of the polymer matrix layer comprises the following steps: stirring the porous polysulfone, the heat-absorbing particles and water to form a blended liquid, heating to evaporate a solvent, and finally obtaining the polymer matrix layer by an extrusion forming method.
The connecting piece comprises a hinge and a lock catch which are respectively arranged at two opposite sides of the half box body.
Sealing strips are arranged around the box opening of the half box body.
The surface of the half box body is coated with a fireproof flame-retardant layer.
The graphene rubber layer is prepared by foaming and steaming a rubber solution, a graphene mixed solution and a coagulant; the graphene mixed solution is a mixed solution of graphene and zinc oxide.
The preparation method of the graphene rubber layer comprises the following steps: firstly, preparing a rubber solution with solid content of 50%; secondly, adding sodium tripolyphosphate into the graphene, stirring, adding zinc oxide with the weight 1:1 of that of the graphene, and continuously stirring to obtain a graphene mixed solution; then, as 20:1: mixing the rubber solution, the graphene mixed solution and the coagulant according to the mass ratio of 0.5, and adding the mixture into foaming equipment for foaming; finally pouring the mixture into a mould to steam the mixture.
Example 2:
a fireproof and explosion-proof protection structure for a high-voltage cable intermediate joint comprises two half box bodies and a connecting piece for connecting the two half box bodies, wherein the two half box bodies form a hollow box body with openings at two ends; the explosion-proof layer is woven by polypropylene fibers, stainless steel fibers and aramid fibers; the heat absorption layer is made of two polymer matrix layers and an expandable graphite layer clamped between the two polymer matrix layers, and the polymer matrix layer is made of a porous polysulfone material, heat absorption particles and a solvent.
The preparation method of the porous polysulfone material comprises the following steps:
1) preparing a polysulfone grafted polyethylene glycol copolymer with the mass ratio of polysulfone to polyethylene glycol of 1:1 into a solution, stirring at normal temperature for 2 hours, then heating to 80 ℃, stirring for 0.5 hour, finally cooling to 45 ℃, and standing for 18 hours;
2) and screening out particles in the solution, and drying at 60 ℃ for 2 hours to obtain the porous polysulfone material.
The heat absorbing particles are ammonium oxalate particles.
The preparation method of the polymer matrix layer comprises the following steps: stirring the porous polysulfone, the heat-absorbing particles and water to form a blended liquid, heating to evaporate a solvent, and finally obtaining the polymer matrix layer by an extrusion forming method.
The connecting piece comprises a hinge and a lock catch which are respectively arranged at two opposite sides of the half box body.
Sealing strips are arranged around the box opening of the half box body.
The surface of the half box body is coated with a fireproof flame-retardant layer.
The graphene rubber layer is prepared by foaming and steaming a rubber solution, a graphene mixed solution and a coagulant; the graphene mixed solution is a mixed solution of graphene and zinc oxide.
The preparation method of the graphene rubber layer comprises the following steps: firstly, preparing a rubber solution with solid content of 50%; secondly, adding sodium tripolyphosphate into the graphene, stirring, adding zinc oxide with the weight 1:1 of that of the graphene, and continuously stirring to obtain a graphene mixed solution; then, as 20:1: mixing the rubber solution, the graphene mixed solution and the coagulant according to the mass ratio of 0.5, and adding the mixture into foaming equipment for foaming; finally pouring the mixture into a mould to steam the mixture.
Example 3:
a fireproof and explosion-proof protection structure for a high-voltage cable intermediate joint comprises two half box bodies and a connecting piece for connecting the two half box bodies, wherein the two half box bodies form a hollow box body with openings at two ends; the explosion-proof layer is woven by polypropylene fibers, stainless steel fibers and aramid fibers; the heat absorption layer is made of two polymer matrix layers and an expandable graphite layer clamped between the two polymer matrix layers, and the polymer matrix layer is made of a porous polysulfone material, heat absorption particles and a solvent.
The preparation method of the porous polysulfone material comprises the following steps:
1) preparing a solution from a polysulfone grafted polyethylene glycol copolymer with the mass ratio of polysulfone to polyethylene glycol of 0.8:1, stirring at normal temperature for 1.5h, then heating to 75 ℃, stirring for 0.5h, finally cooling to 42 ℃, and standing for 19 h;
2) and screening out particles in the solution, and drying at 50 ℃ for 2.5 hours to obtain the porous polysulfone material.
The heat absorbing particles are ammonium oxalate particles.
The preparation method of the polymer matrix layer comprises the following steps: stirring the porous polysulfone, the heat-absorbing particles and water to form a blended liquid, heating to evaporate a solvent, and finally obtaining the polymer matrix layer by an extrusion forming method.
The connecting piece comprises a hinge and a lock catch which are respectively arranged at two opposite sides of the half box body.
Sealing strips are arranged around the box opening of the half box body.
The surface of the half box body is coated with a fireproof flame-retardant layer.
The graphene rubber layer is prepared by foaming and steaming a rubber solution, a graphene mixed solution and a coagulant; the graphene mixed solution is a mixed solution of graphene and zinc oxide.
The preparation method of the graphene rubber layer comprises the following steps: firstly, preparing a rubber solution with solid content of 50%; secondly, adding sodium tripolyphosphate into the graphene, stirring, adding zinc oxide with the weight 1:1 of that of the graphene, and continuously stirring to obtain a graphene mixed solution; then, as 20:1: mixing the rubber solution, the graphene mixed solution and the coagulant according to the mass ratio of 0.5, and adding the mixture into foaming equipment for foaming; finally pouring the mixture into a mould to steam the mixture.
Example 4:
a fireproof and explosion-proof protection structure for a high-voltage cable intermediate joint comprises two half box bodies and a connecting piece for connecting the two half box bodies, wherein the two half box bodies form a hollow box body with openings at two ends; the explosion-proof layer is woven by polypropylene fibers, stainless steel fibers and aramid fibers; the heat absorption layer is made of two polymer matrix layers and an expandable graphite layer clamped between the two polymer matrix layers, and the polymer matrix layer is made of a porous polysulfone material, heat absorption particles and a solvent.
The preparation method of the porous polysulfone material comprises the following steps:
1) preparing a polysulfone grafted polyethylene glycol copolymer with the mass ratio of polysulfone to polyethylene glycol of 0.5:1 into a solution, stirring at normal temperature for 1h, then heating to 70 ℃, stirring for 0.5h, finally cooling to 40 ℃, and standing for 18 h;
2) and screening out particles in the solution, and drying at 40 ℃ for 3 hours to obtain the porous polysulfone material.
The heat absorbing particles are sodium silicate particles.
The preparation method of the polymer matrix layer comprises the following steps: stirring the porous polysulfone, the heat-absorbing particles and water to form a blended liquid, heating to evaporate a solvent, and finally obtaining the polymer matrix layer by an extrusion forming method.
The connecting piece comprises a hinge and a lock catch which are respectively arranged at two opposite sides of the half box body.
Sealing strips are arranged around the box opening of the half box body.
The surface of the half box body is coated with a fireproof flame-retardant layer.
The graphene rubber layer is prepared by foaming and steaming a rubber solution, a graphene mixed solution and a coagulant; the graphene mixed solution is a mixed solution of graphene and zinc oxide.
The preparation method of the graphene rubber layer comprises the following steps: firstly, preparing a rubber solution with solid content of 50%; secondly, adding sodium tripolyphosphate into the graphene, stirring, adding zinc oxide with the weight 1:1 of that of the graphene, and continuously stirring to obtain a graphene mixed solution; then, as 20:1: mixing the rubber solution, the graphene mixed solution and the coagulant according to the mass ratio of 0.5, and adding the mixture into foaming equipment for foaming; finally pouring the mixture into a mould to steam the mixture.
Embodiment 1 ~ 4 high tension cable intermediate head fire prevention explosion-proof protection architecture passes through the reasonable setting of functional structure, and easily installation is dismantled, and has excellent fire prevention explosion-proof performance, can install and play good guard action on high tension cable intermediate head surface, not only can reduce high tension cable and take place the risk of burning or explosion, reduction burning or explosion that can also be very big threaten to other power equipment in the environment and operating personnel's safety.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, so as to understand the technical solutions of the present invention specifically and in detail, but not to be understood as the limitation of the protection scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. It should be understood that the technical solutions provided by the present invention, which are obtained by logical analysis, reasoning or limited experiments, are within the scope of the present invention as set forth in the appended claims. Therefore, the protection scope of the present invention should be subject to the content of the appended claims, and the description and the drawings can be used for explaining the content of the claims.
Claims (10)
1. The utility model provides a high tension cable intermediate head fire prevention explosion-proof protection architecture which characterized in that includes:
the box comprises a hollow box body, wherein openings are formed in two ends of the hollow box body;
an explosion-proof layer, a heat absorption layer and a graphene rubber layer are sequentially arranged on the inner wall of the hollow box body from outside to inside, wherein the explosion-proof layer is made of polypropylene fibers, stainless steel fibers and aramid fibers;
the heat absorbing layer comprises at least two polymer matrix layers and an expandable graphite layer arranged between two adjacent polymer matrix layers; the preparation raw materials of the polymer matrix layer comprise a porous polysulfone material and heat-absorbing particles.
2. The fireproof and explosion-proof protection structure for the intermediate joint of the high-voltage cable according to claim 1, wherein raw materials for preparing the graphene rubber layer comprise rubber, graphene, zinc oxide and a coagulant.
3. The fireproof and explosion-proof protection structure for the intermediate joint of the high-voltage cable according to claim 1, wherein the preparation method of the graphene rubber layer comprises the following steps:
preparing a rubber solution with the solid content of 40-60%;
mixing graphene and a sodium tripolyphosphate solution, then adding zinc oxide, and mixing to obtain a graphene mixed solution, wherein the mass ratio of the graphene to the zinc oxide is 1 (0.5-1.5);
and mixing the rubber solution, the graphene mixed solution and a coagulant, foaming, pouring into a mould and steaming.
4. The fireproof and explosion-proof protection structure for the intermediate joint of the high-voltage cable according to claim 1, wherein the preparation method of the porous polysulfone material comprises the following steps:
taking the mass ratio of polysulfone to polyethylene glycol as (0.5-1): 1, preparing a solution by using the polysulfone grafted polyethylene glycol copolymer;
stirring the solution at room temperature for 1-2 h;
heating to 70-80 ℃, and stirring the solution for 0.3-0.5 h;
cooling to 40-45 ℃, and standing for 18-20 h;
filtering and screening out particles in the solution, and drying the particles at 40-60 ℃ for 2-3 h.
5. The fireproof and explosion-proof protection structure for an intermediate joint of a high-voltage cable according to claim 1, wherein the heat-absorbing particles are at least one selected from ammonium oxalate particles, sodium silicate particles, lauric acid particles and palmitic acid particles.
6. The structure of claim 1, wherein the polymer matrix layer is prepared by a method comprising:
and mixing the porous polysulfone material, the heat-absorbing particles and the solvent to form a blended liquid, heating and evaporating, and extruding and molding.
7. The fireproof and explosion-proof protection structure for the intermediate joint of the high-voltage cable according to any one of claims 1 to 6, wherein the hollow box body consists of a first box body, a second box body and a connecting piece; the first box body and the second box body are connected through the connecting piece to form the hollow box body.
8. The fire-proof and explosion-proof protection structure for the middle joint of a high-voltage cable according to claim 7, wherein the connecting piece comprises a hinge and a lock catch which are respectively arranged at two opposite sides of the first box body and the second box body.
9. The fire-proof and explosion-proof protection structure for the intermediate joint of the high-voltage cable as claimed in claim 7, wherein a sealing strip is arranged at the joint of the peripheries of the first box body and the second box body.
10. The structure for protecting the intermediate joint of the high-voltage cable from fire and explosion according to any one of claims 1 to 7, wherein a fire-retardant layer is sprayed on the outer surface of the hollow box body.
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| CN116741452A (en) * | 2023-08-08 | 2023-09-12 | 金泰电缆有限公司 | Aluminum alloy core cable |
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