CN113478918B - Flexible fireproof and explosion-proof blanket of high-voltage cable connector and manufacturing method thereof - Google Patents

Flexible fireproof and explosion-proof blanket of high-voltage cable connector and manufacturing method thereof Download PDF

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Publication number
CN113478918B
CN113478918B CN202110770423.1A CN202110770423A CN113478918B CN 113478918 B CN113478918 B CN 113478918B CN 202110770423 A CN202110770423 A CN 202110770423A CN 113478918 B CN113478918 B CN 113478918B
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China
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explosion
proof
silica gel
fireproof
glass fiber
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CN113478918A (en
Inventor
张国锋
聂永杰
陈瑞斌
陈四甫
务孔永
韦扬志
王倩倩
李付磊
李建鑫
吕坤阳
张明磊
胡松江
朱刘帅
陈明喜
陈晓朋
陈见甫
邢远
周媛
郑伟
李景丽
王森
谭波
丁卫东
郭洁
叶钟飞
谭兴华
从鹏松
尹李健
朱渊博
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Four Of Henan Electric Power Equipment Co ltd
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Four Of Henan Electric Power Equipment Co ltd
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    • B32B2038/0052—Other operations not otherwise provided for
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    • B32B2571/00—Protective equipment

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  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Electric Cable Installation (AREA)

Abstract

The invention relates to a flexible fireproof and explosion-proof blanket of a high-voltage cable joint and a manufacturing method thereof, wherein the fireproof and explosion-proof blanket comprises a fireproof and explosion-proof blanket body and a fastening assembly, the fireproof and explosion-proof blanket body comprises a graphite braid layer and a glass fiber silica gel layer, an interlayer cavity is formed between the graphite braid layer and the glass fiber silica gel layer, the interlayer cavity is divided into an explosion-proof cavity and a fireproof cavity by a sewing line, an arc-resistant material layer, a hand-tearing stainless steel layer and a Kevlar fiber layer are sequentially arranged in the explosion-proof cavity from top to bottom, and a plurality of expandable graphite bags are arranged in the fireproof cavity at intervals. The fireproof and explosion-proof blanket is divided into a fireproof area and an explosion-proof area, when the fireproof and explosion-proof blanket is wrapped on a cable joint, a core-shell structure can be formed, the core is the explosion-proof area wrapping the joint, and the shell is the fireproof area wrapping the explosion-proof area.

Description

Flexible fireproof and explosion-proof blanket of high-voltage cable joint and manufacturing method thereof
Technical Field
The invention relates to the technical field of cable protection, in particular to a flexible fireproof and explosion-proof blanket of a high-voltage cable joint and a manufacturing method thereof.
Background
During the laying of the cable in the tunnel, the manufacture of the cable intermediate joint is influenced by factors such as field manufacture conditions, materials, processes and the like, and becomes a weak link of a cable line. Once an intermediate joint fault occurs, the generated destructive force not only can cause the power failure of the line to be out of service, but also can cause damage to peripheral running cable lines, power facilities and personnel, and even can cause secondary accidents. With the development of urban economy, the high-voltage cable lines of 110kV and above laid in tunnels are continuously increasing. In order to save channel resources, the application conditions of cable laying of a 2.4m small-diameter tunnel, a pipe arrangement and a cable well are very common, and the condition that cable line construction is carried out under the condition that a running cable line is arranged in the small-diameter tunnel or the pipe arrangement often exists. However, due to space limitation, common explosion-proof housings of most manufacturers cannot be installed at present. The cable tunnel is sealed in environment, the distance between people entering and exiting the manhole is long, and when the conditions such as explosion, fire, smoke and the like are caused due to sudden failures of cable joints and the like in the tunnel, on one hand, other nearby equipment can be damaged greatly, and on the other hand, the personal safety of operators can be threatened.
Disclosure of Invention
The invention aims to solve the technical problems and provide a flexible fireproof and explosion-proof blanket for a high-voltage cable joint and a manufacturing method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a flexible fire-proof and explosion-proof blanket that high tension cable connects, includes fire-proof and explosion-proof blanket body and is used for wrapping up the fastening components of fire-proof and explosion-proof blanket body in high tension cable joint department, fire explosion-proof blanket body includes graphite weaving layer and glass fiber silica gel layer, and glass fiber silica gel layer lays in graphite weaving layer below, and four sides of glass fiber silica gel layer extend to turn over the side parcel with the graphite weaving layer after rolling over, form the intermediate layer cavity between graphite weaving layer and the glass fiber silica gel layer, this intermediate layer cavity is separated for explosion-proof chamber and fire prevention chamber by the sewing line, the explosion-proof intracavity has set gradually anti-electric arc material layer, hand from top to bottom tears stainless steel layer and kaivra fibre layer, the fire prevention intracavity interval is provided with a plurality of expandable graphite bags, and expandable graphite bag is constituteed by the bag body that chemical fabric made and the expandable graphite granule of packing in the bag body, and expandable graphite bag is made on glass fiber silica gel layer.
The flexible fireproof and explosion-proof blanket used as the high-voltage cable joint is further optimized as follows: the fastening assembly comprises a plurality of fastening units arranged on the fireproof and explosion-proof blanket body side by side, each fastening unit comprises a magic buckle and a plurality of fastening line noses, the fastening line noses are sewn on the outer surface of the glass fiber silica gel layer of the fireproof and explosion-proof blanket body, the magic buckles are of a long strip-shaped structure, one end of the magic buckle is sewn on the side edge of the corresponding fireproof cavity outside the glass fiber silica gel layer, the other end of the magic buckle penetrates through the fastening line noses in sequence, one rear part of the magic buckle, which is far away from the glass fiber silica gel layer, is provided with bonding thorns, and the rest surfaces of the magic buckle are provided with bonding bristles.
The flexible fireproof and explosion-proof blanket used as the high-voltage cable joint is further optimized as follows: the bag body of the expandable graphite bag is divided into a plurality of mutually independent bag chambers by sewing lines.
The flexible fireproof and explosion-proof blanket used as the high-voltage cable joint is further optimized as follows: the expandable graphite bag is filled with modified expandable graphite particles.
The flexible fireproof and explosion-proof blanket used as the high-voltage cable joint is further optimized as follows: the expandable graphite bag is filled with expandable graphite particles and modified expandable graphite particles which are blended with each other, wherein the mass ratio of the expandable graphite particles to the modified expandable graphite particles is 1-2.
The flexible fireproof and explosion-proof blanket serving as the high-voltage cable joint is further optimized as follows: the modified expandable graphite is obtained by pre-expanding expandable graphite and then modifying the expandable graphite by basic copper carbonate.
The flexible fireproof and explosion-proof blanket used as the high-voltage cable joint is further optimized as follows: the preparation method of the modified expandable graphite comprises the following steps: setting the temperature of the expansion furnace to be 350-450 ℃, feeding the expandable graphite into the expansion furnace, and expanding for 3-6s in the expansion furnace to obtain pre-expanded graphite worms; mixing the pre-expanded graphite worms with water, and then adding a dispersing agent for ultrasonic dispersion to obtain a pre-expanded graphite worm dispersion liquid; adding basic copper carbonate into the pre-expanded graphite worm dispersion liquid, and continuing ultrasonic dispersion to obtain a target dispersion liquid; and (3) performing centrifugal separation on the target dispersion liquid, and drying the separated precipitate to obtain the modified expandable graphite.
The flexible fireproof and explosion-proof blanket serving as the high-voltage cable joint is further optimized as follows: the expansion volume of the pre-expanded graphite worms is 180-230ml/g, and the mass ratio of the pre-expanded graphite worms to water is 1:50-70 percent of dispersant, 0.5-2 percent of the weight of the pre-expanded graphite worms and 10-60 percent of basic copper carbonate.
A manufacturing method of a flexible fireproof and explosion-proof blanket of a high-voltage cable joint comprises the following steps:
(1) Respectively cutting silica gel glass fiber cloth, an arc-resistant rubber belt, hand-tearing stainless steel and Kevlar fiber cloth according to the designed size, and weaving a graphite braid layer according to the designed size;
(2) Sewing a chemical fiber cloth bag, filling expandable graphite particles in the chemical fiber cloth bag, and sealing the chemical fiber cloth bag after filling;
(3) The method comprises the following steps of flatly paving silica gel glass fiber cloth on a workbench, dividing the silica gel glass fiber cloth into an explosion-proof area on the left side and a fire-proof area on the right side along a vertical separation line, sequentially stacking an anti-arc rubber belt, hand-tearing stainless steel and Kevlar fiber cloth on the explosion-proof area of the silica gel glass fiber cloth from top to bottom, and sewing a plurality of chemical fiber cloth bags filled with expandable graphite particles on the fire-proof area of the silica gel glass fiber cloth through the peripheries of the chemical fiber cloth bags;
(4) Laying a graphite braid above an explosion-proof area and a fire-proof area, sewing along a vertical partition line, connecting the graphite braid with the middle part of silica gel glass fiber cloth, and then turning over four side edges of the silica gel glass fiber cloth and sewing the four side edges of the silica gel glass fiber cloth with the graphite braid;
(5) Cutting and folding silica gel glass fiber cloth to obtain a fastening line nose, and sewing the fastening line nose on the outer surface of the glass fiber silica gel layer of the fireproof and explosion-proof blanket body according to the designed position;
(6) And cutting and folding the silica gel glass fiber cloth to obtain the magic buckle, and sewing the magic buckle on the outer surface of the glass fiber silica gel layer of the fireproof and explosion-proof blanket body according to the designed position.
The manufacturing method of the flexible fireproof and explosion-proof blanket used as the high-voltage cable joint is further optimized as follows: the sewing uses flame-retardant threads.
Advantageous effects
1. The fireproof and explosion-proof blanket is divided into a fireproof area and an explosion-proof area, the explosion-proof area is a multilayer structure formed by an arc-resistant material layer, a hand-tearing stainless steel layer and a Kevlar fiber layer, the multilayer structure can not be easily deformed and broken when facing large impact force, so that the integrity of the whole fireproof and explosion-proof blanket structure is maintained, the heat and impact can be prevented from being spread when the inside or the outside explodes, the excellent explosion-proof effect is achieved, the core of the fireproof area is a plurality of expandable graphite particle layers arranged at intervals, and the expandable graphite particles can absorb a large amount of heat and release C0 in a high-temperature environment 2 The fire and explosion prevention blanket can form a core-shell structure when being wrapped on the cable joint, the core is an explosion-proof area wrapping the joint, and the shell is a fire-proof area wrapping the explosion-proof area, so that the core-shell structure can prevent the fire-proof area from being damaged firstly when explosion happens, and the fire-proof area cannot play a role in preventing flame spread;
2. the flexible fireproof and explosion-proof blanket has excellent fireproof performance, the fireproof and explosion-proof blanket is internally provided with the common expandable graphite and the modified expandable graphite, and when the flexible fireproof and explosion-proof blanket is burnt, under a high-temperature environment, on one hand, the structural characteristics of the expandable graphite determine that the expandable graphite can absorb a large amount of heat in the expansion process and decompose to generate C0 2 The combustion is restrained, and the expanded graphite structure is loose and porous, has larger specific surface area which can reach 50-200m 2 The coating is easy to adsorb nonpolar organic macromolecular substances, particularly oils, and avoids the spread of combustion; in another aspect, modified expandable stoneThe ink continues to expand at high temperature, the surface of the graphite and the basic copper carbonate wrapped between the graphite layers are exposed, and the basic copper carbonate is decomposed to generate CO at high temperature 2 、H 2 O and copper oxide, CO 2 And H 2 O is helpful to inhibit the spread of combustion, and the copper oxide decomposed by the basic copper carbonate and the graphite can further react at high temperature to generate CO 2 Through the release of the carbon dioxide in the three layers, the spread of combustion can be effectively restrained, and the fireproof performance is better.
Drawings
FIG. 1 is a schematic front view of the fire-proof and explosion-proof blanket of the present invention;
FIG. 2 is a schematic side view of the fire and explosion protection blanket of the present invention;
FIG. 3 is a schematic structural view of the fire and explosion protection blanket body of the fire and explosion protection blanket of the present invention;
FIG. 4 is a schematic view of the construction of the expandable graphite bag of the fire and explosion protection blanket of the present invention;
fig. 5 is a schematic structural view of a magic buckle of the fire and explosion protection blanket of the present invention;
FIG. 6 is a schematic view of the internal structure of the fire-proof and explosion-proof blanket body of the fire-proof and explosion-proof blanket of the present invention;
FIG. 7 is a schematic diagram of the inner structure of the explosion-proof chamber and the fire-proof chamber of the fire-proof and explosion-proof blanket of the present invention;
FIG. 8 is a schematic diagram of the fire-proof and explosion-proof blanket of the present invention in physical (flat state);
FIG. 9 is a schematic diagram of the fire-proof and explosion-proof blanket according to the present invention in its physical form (folded state);
the labels in the figure are: 1. the fireproof and explosion-proof blanket comprises a fireproof and explosion-proof blanket body, 2 parts of a fastening component, 1-1 part of a graphite woven layer, 1-2 parts of a glass fiber silica gel layer, 1-3 parts of an arc-resistant material layer, 1-4 parts of a hand-tearing stainless steel layer, 1-5 parts of a Kevlar fiber layer, 1-6 parts of an expandable graphite bag, 2-1 parts of a magic buckle, 2-2 parts of a fastening wire nose, 2-3 parts of a bonding thorn, 2-4 parts of bonding wool.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in the figure: a flexible fireproof and explosion-proof blanket for a high-voltage cable joint comprises a fireproof and explosion-proof blanket body 1 and a fastening assembly 2 used for wrapping the fireproof and explosion-proof blanket body 1 at the high-voltage cable joint, wherein the fireproof and explosion-proof blanket body 1 comprises a graphite braid 1-1 and a glass fiber silica gel layer 1-2, the glass fiber silica gel layer 1-2 is laid below the graphite braid 1-1, four side edges of the glass fiber silica gel layer 1-2 extend and turn over and wrap the side edges of the graphite braid 1-1, an interlayer cavity is formed between the graphite braid 1-1 and the glass fiber silica gel layer 1-2 and is divided into an explosion-proof cavity and a fireproof cavity by a sewing line, an electric arc resistant material layer 1-3, a hand-tearing stainless steel layer 1-4 and a Kevlar fiber layer 1-5 are sequentially arranged in the explosion-proof cavity from top to bottom, a plurality of expandable graphite bags 1-6 are arranged in the fireproof cavity at intervals, each expandable graphite bag 1-6 is composed of a bag body made of chemical fiber cloth and expandable graphite particles filled in the glass fiber silica gel layer 1-2.
Put and prevented that expandable graphite granule from taking place to remove in the internal of bag and leading to it can not evenly distributed at the internal of bag, expandable graphite bag 1-6's the bag body is separated for a plurality of mutually independent bag rooms through the sewing line, through such multizone structural design, can promote its fire prevention effect's stability.
The electric arc resistant material layer 1-3 can be rubber with electric arc resistance, and the hand-tearing stainless steel layer 1-4 is 304 hand-tearing stainless steel.
The fastening assembly 2 comprises a plurality of fastening units arranged on the fireproof and explosion-proof blanket body 1 side by side, each fastening unit comprises a magic buckle 2-1 and a plurality of fastening line noses 2-2, the fastening line noses 2-2 are sewn on the outer surface of a glass fiber silica gel layer 1-2 of the fireproof and explosion-proof blanket body 1, the magic buckle 2-1 is of a long strip-shaped structure, one end of the magic buckle 2-1 is sewn on the side edge, corresponding to the fireproof cavity, of the glass fiber silica gel layer 1-2, the other end of the magic buckle 2-1 sequentially penetrates through the plurality of fastening line noses 2-2, the rear portion, away from the glass fiber silica gel layer 1-2, of the magic buckle 2-1 is provided with bonding spines 2-3, and the rest faces of the magic buckle 2-1 are provided with bonding bristles 2-4.
In order to facilitate the fire-proof and explosion-proof blanket to be wrapped at the cable joint, a hook-and-loop fastener can be further arranged at the fixed end of the magic buckle 2-1.
The expandable graphite bags 1-6 are filled with modified expandable graphite particles.
The expandable graphite bag 1-6 is filled with expandable graphite particles and modified expandable graphite particles which are blended with each other, wherein the mass ratio of the expandable graphite particles to the modified expandable graphite particles is (1-2) - (2-5).
The preparation method of the modified expandable graphite specifically comprises the following steps:
1) Setting the temperature of the expansion furnace to 350 ℃, feeding the expandable graphite into the expansion furnace, and expanding for 6s in the expansion furnace to obtain pre-expanded graphite worms;
the expandable graphite is prepared by taking natural crystalline flake graphite as a raw material through oxidation intercalation reaction, is a conventional chemical raw material, and can be purchased and used by self or prepared and used by self by the method in the prior art.
The intercalation material contained in the expandable graphite can open up the graphite sheets under the driving force generated by vaporization under high temperature condition, so the expansion temperature is an important parameter influencing the structure of the expandable graphite, from 300 to 900 ℃, the expansion volume of the expandable graphite is gradually increased along with the increase of the expansion temperature, which shows that the driving force generated by heating the intercalation material contained in the expandable graphite is gradually increased along with the increase of the expansion temperature, and the destruction effect on the graphite sheets is larger.
The inventor sets the expansion temperature to be 350-450 ℃, expands the expandable graphite for 3-6s at the temperature, and can preliminarily expand the expandable graphite to become the pre-expanded graphite worms, and it needs to be noted that in order to ensure that the expandable graphite still has higher expansion performance at high temperature in the subsequent use process, the expansion temperature and the expansion time need to be reasonably proportioned, and finally the expansion volume of the prepared pre-expanded graphite worms is between 180 and 230 ml/g.
2) Mixing the pre-expanded graphite worms with water, and then adding a dispersing agent for ultrasonic dispersion to obtain a pre-expanded graphite worm dispersion liquid;
the mass ratio of the pre-expanded graphite worms to water is 1:50, and the addition amount of the dispersing agent is 0.5 percent of the weight of the pre-expanded graphite worms. The dispersant can be selected from conventional dispersants, such as activated calcium phosphate, sodium polyacrylate, etc.
3) Adding basic copper carbonate into the pre-expanded graphite worm dispersion liquid, and continuing to perform ultrasonic dispersion to obtain a target dispersion liquid;
the addition amount of the basic copper carbonate is 30 percent of the weight of the pre-expanded graphite worms, and the addition amount of the basic copper carbonate can influence the fire resistance of the finally modified expandable graphite, but only can influence the fire resistance, and can not cause the loss of the fire resistance. Modified expandable graphite products with different specifications and standards can be produced according to different addition proportions of the basic copper carbonate.
4) Centrifuging the target dispersion liquid, and drying the separated precipitate to obtain modified expandable graphite; the centrifugal separation and drying are conventional treatment methods in the chemical field and will not be described in detail, and it should be noted that the drying temperature is controlled within 100 ℃, preferably 85 ℃.
In use, the fire-proof and explosion-proof blanket is wrapped from the explosion-proof area, and the most suitable design is that the size of the explosion-proof area can cover the whole joint, namely the explosion-proof area can wrap the joint for at least one circle.
The manufacturing method of the fireproof and explosion-proof blanket comprises the following steps:
it should be noted that some steps in all the following steps are not in strict sequence, and are adjusted according to actual situations.
(1) Respectively cutting silica gel glass fiber cloth, an arc-resistant rubber belt, hand-tearing stainless steel and Kevlar fiber cloth according to the designed size, and weaving a graphite braid layer according to the designed size;
(2) Sewing a chemical fiber cloth bag, filling expandable graphite particles in the chemical fiber cloth bag, and sealing the chemical fiber cloth bag after filling;
(3) The method comprises the following steps of flatly paving silica gel glass fiber cloth on a workbench, dividing the silica gel glass fiber cloth into an explosion-proof area on the left side and a fire-proof area on the right side along a vertical separation line, sequentially stacking an anti-arc rubber belt, hand-tearing stainless steel and Kevlar fiber cloth on the explosion-proof area of the silica gel glass fiber cloth from top to bottom, and sewing a plurality of chemical fiber cloth bags filled with expandable graphite particles on the fire-proof area of the silica gel glass fiber cloth through the peripheries of the chemical fiber cloth bags;
(4) Laying a graphite braid above an explosion-proof area and a fire-proof area, sewing along a vertical partition line, connecting the graphite braid with the middle part of silica gel glass fiber cloth, and then turning over four side edges of the silica gel glass fiber cloth and sewing the four side edges of the silica gel glass fiber cloth with the graphite braid;
(5) Cutting and folding silica gel glass fiber cloth to obtain a fastening line nose, and sewing the fastening line nose on the outer surface of the glass fiber silica gel layer of the fireproof and explosion-proof blanket body according to the designed position;
(6) The magic button is obtained after the silica gel glass fiber cloth is cut and folded, and the magic button is sewn on the outer surface of the glass fiber silica gel layer of the fireproof and explosion-proof blanket body according to the designed position.
It should be noted that, in the summary of the manufacturing process of the fire-proof and explosion-proof blanket, the used sewing threads are all flame-retardant threads.
The fireproof and explosion-proof blanket is divided into a fireproof area and an explosion-proof area, wherein the explosion-proof area is of a multilayer structure formed by an arc-resistant material layer, a hand-tearing stainless steel layer and a Kevlar fiber layer, the multilayer structure can not be deformed and broken when facing large impact force, so that the integrity of the whole fireproof and explosion-proof blanket structure is maintained, heat and impact can be prevented from being spread when the inside or the outside of the blanket is exploded, an excellent explosion-proof effect is achieved, the core of the fireproof area is a plurality of expandable graphite particle layers arranged at intervals, the expandable graphite particles can absorb a large amount of heat and release C02 to inhibit combustion in a high-temperature environment, a core-shell structure can be formed when the explosion-proof blanket is wrapped on a cable joint, the core is the explosion-proof area wrapping the joint, and the shell is the fireproof area wrapping the explosion-proof area, so that the core-shell structure can prevent the fire-proof area from being damaged firstly to achieve the effect of preventing flame from spreading when the explosion occurs.
The foregoing description has described specific embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (10)

1. The utility model provides a flexible fire prevention explosion-proof blanket that high tension cable connects which characterized in that: the fireproof and explosion-proof blanket comprises a fireproof and explosion-proof blanket body (1) and a fastening assembly (2) used for wrapping the fireproof and explosion-proof blanket body (1) at a joint of a high-voltage cable, wherein the fireproof and explosion-proof blanket body (1) comprises a graphite weaving layer (1-1) and a glass fiber silica gel layer (1-2), the glass fiber silica gel layer (1-2) is laid below the graphite weaving layer (1-1), four side edges of the glass fiber silica gel layer (1-2) extend and turn over to wrap the side edges of the graphite weaving layer (1-1), an interlayer cavity is formed between the graphite weaving layer (1-1) and the glass fiber silica gel layer (1-2), the interlayer cavity is divided into an explosion-proof cavity and a fireproof cavity by sewing lines, an arc-resistant material layer (1-3), a hand-tearing stainless steel layer (1-4) and a Kevlar fiber layer (1-5) are sequentially arranged in the explosion-proof cavity from top to bottom, a plurality of expandable graphite bags (1-6) are arranged in the fireproof cavity at intervals, a bag body made of chemical fiber cloth and graphite particles filled in the bag body, and the expandable graphite bags (1-6) are sewn on the glass fiber silica gel layer (1-2).
2. A flexible fire and explosion protection blanket for a high voltage cable joint as defined in claim 1, wherein: the fastening assembly (2) comprises a plurality of fastening units arranged on the fireproof and explosion-proof blanket body (1) side by side, each fastening unit comprises a magic buckle (2-1) and a plurality of fastening line noses (2-2), the fastening line noses (2-2) are sewn on the outer surface of the glass fiber silica gel layer (1-2) of the fireproof and explosion-proof blanket body (1), the magic buckle (2-1) is of a long strip-shaped structure, one end of the magic buckle (2-1) is sewn on the side edge, corresponding to the fireproof cavity, of the outer portion of the glass fiber silica gel layer (1-2), the other end of the magic buckle (2-1) sequentially penetrates through the plurality of fastening line noses (2-2) to be arranged, one side rear portion, far away from the glass fiber silica gel layer (1-2), of the magic buckle (2-1) is provided with bonding burrs (2-3), and the rest faces of the magic buckle (2-1) are provided with bonding burrs (2-4).
3. A flexible fire and explosion protection blanket for a high voltage cable joint as defined in claim 1, wherein: the bag body of the expandable graphite bag (1-6) is divided into a plurality of mutually independent bag chambers by sewing lines.
4. A flexible fire and explosion protection blanket for a high voltage cable joint as defined in claim 1, wherein: the expandable graphite bags (1-6) are filled with modified expandable graphite particles.
5. A flexible fire and explosion protection blanket for a high voltage cable joint as defined in claim 1, wherein: the expandable graphite bag (1-6) is filled with expandable graphite particles and modified expandable graphite particles which are blended with each other, wherein the mass ratio of the expandable graphite particles to the modified expandable graphite particles is 1-2.
6. A flexible fire and explosion protection blanket for a high voltage cable joint as claimed in claim 4 or 5, wherein: the modified expandable graphite is obtained by pre-expanding expandable graphite and then modifying the expandable graphite by basic copper carbonate.
7. A flexible fire and explosion protection blanket for a high voltage cable joint as defined in claim 6, wherein: the preparation method of the modified expandable graphite comprises the following steps: setting the temperature of the expansion furnace to be 350-450 ℃, feeding the expandable graphite into the expansion furnace, and expanding for 3-6s in the expansion furnace to obtain pre-expanded graphite worms; mixing the pre-expanded graphite worms with water, and then adding a dispersing agent for ultrasonic dispersion to obtain a pre-expanded graphite worm dispersion liquid; adding basic copper carbonate into the pre-expanded graphite worm dispersion liquid, and continuing ultrasonic dispersion to obtain a target dispersion liquid; and (3) carrying out centrifugal separation on the target dispersion liquid, and drying the separated precipitate to obtain the modified expandable graphite.
8. A flexible fire and explosion protection blanket for a high voltage cable joint as defined in claim 7, wherein: the expansion volume of the pre-expanded graphite worms is 180-230ml/g, and the mass ratio of the pre-expanded graphite worms to water is 1:50 to 70 percent of dispersant, 0.5 to 2 percent of the weight of the pre-expanded graphite worms and 10 to 60 percent of basic copper carbonate.
9. A manufacturing method of a flexible fireproof and explosion-proof blanket of a high-voltage cable joint is characterized by comprising the following steps: the method comprises the following steps:
(1) Respectively cutting silica gel glass fiber cloth, an arc-resistant rubber belt, hand-tearing stainless steel and Kevlar fiber cloth according to the designed size, and weaving a graphite braid layer according to the designed size;
(2) Sewing a chemical fiber cloth bag, filling expandable graphite particles in the chemical fiber cloth bag, and sealing the chemical fiber cloth bag after filling;
(3) The method comprises the following steps of flatly paving silica gel glass fiber cloth on a workbench, dividing the silica gel glass fiber cloth into an explosion-proof area on the left side and a fire-proof area on the right side along a vertical separation line, sequentially stacking an anti-arc rubber belt, hand-tearing stainless steel and Kevlar fiber cloth on the explosion-proof area of the silica gel glass fiber cloth from top to bottom, and sewing a plurality of chemical fiber cloth bags filled with expandable graphite particles on the fire-proof area of the silica gel glass fiber cloth through the peripheries of the chemical fiber cloth bags;
(4) Laying a graphite braid above an explosion-proof area and a fire-proof area, sewing along a vertical separation line, connecting the graphite braid with the middle part of the silica gel glass fiber cloth, and then folding four side edges of the silica gel glass fiber cloth and sewing the four side edges of the silica gel glass fiber cloth with the graphite braid;
(5) Cutting and folding silica gel glass fiber cloth to obtain a fastening line nose, and sewing the fastening line nose on the outer surface of the glass fiber silica gel layer of the fireproof and explosion-proof blanket body according to the designed position;
(6) The magic button is obtained after the silica gel glass fiber cloth is cut and folded, and the magic button is sewn on the outer surface of the glass fiber silica gel layer of the fireproof and explosion-proof blanket body according to the designed position.
10. A method for manufacturing a flexible fire and explosion protection blanket for a high voltage cable joint according to claim 9, wherein: the sewing uses flame-retardant threads.
CN202110770423.1A 2021-07-08 2021-07-08 Flexible fireproof and explosion-proof blanket of high-voltage cable connector and manufacturing method thereof Active CN113478918B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209913476U (en) * 2019-06-28 2020-01-07 南京中港电力股份有限公司 Fireproof heat-insulation blanket for power high-voltage cable connector
CN209920689U (en) * 2019-04-09 2020-01-10 南京远能电力工程有限公司栖霞分公司 Fireproof explosion-proof electric arc-resistant protective blanket for cable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209920689U (en) * 2019-04-09 2020-01-10 南京远能电力工程有限公司栖霞分公司 Fireproof explosion-proof electric arc-resistant protective blanket for cable
CN209913476U (en) * 2019-06-28 2020-01-07 南京中港电力股份有限公司 Fireproof heat-insulation blanket for power high-voltage cable connector

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