CN112700920A - Self-adaptive rigid-flexible dual-state fireproof cable - Google Patents
Self-adaptive rigid-flexible dual-state fireproof cable Download PDFInfo
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- 239000001099 ammonium carbonate Substances 0.000 claims description 8
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- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 4
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Abstract
The invention discloses a self-adaptive rigid-flexible dual-state fireproof cable, belonging to the field of cables, wherein under the high-temperature environment of fire, external high temperature is firstly transmitted to the interior of a thermosetting filling liquid through a heat-conducting air-filtering soft wire rate, so that water in the thermosetting filling liquid is heated and evaporated, water molecules are transmitted to the outside through the heat-conducting air-filtering soft wire, the thermosetting filling liquid is sintered into a solid under the action of high temperature after losing water, in the process, on one hand, the external temperature is consumed, the evaporation of the water in the thermosetting filling liquid is promoted, meanwhile, the water vapor evaporated to the outside plays a certain flame retardant role in the external fire environment of a cable core, on the other hand, after the thermosetting filling liquid is sintered into the solid after losing water, a high-strength fireproof heat-resistant protective barrier is formed on the cable core, the cable core is effectively protected, meanwhile, the cable at the position is changed from an original flexible state into a rigid state, and the damage condition of the fire disaster monitoring system in the later period can be conveniently and rapidly judged and detected.
Description
Technical Field
The invention relates to the field of cables, in particular to a self-adaptive rigid-flexible dual-state fireproof cable.
Background
The wire and cable industry is the second industry in China next to the automobile industry, the product variety satisfaction rate and the domestic market share both exceed 90%, China is one of the most important cable product research and development production bases in the world, and the wire and cable industry has a series of cable products with unique performances and special structures, such as flame retardance, fire resistance, high temperature and low temperature resistance, low inductance, low noise, environmental protection, low smoke, zero halogen, ant and mouse resistance, water and moisture resistance and the like, and has formed certain productivity. With the continuous improvement of the security protection and system safety requirements of the society, through the wide publicity, promotion and cooperation of governments, industries and enterprises, the special cable product with high performance, high efficiency and safety is certainly widely applied to various industry systems like developed countries in the west.
At present, fireproof cables used in the market have two types of rigidity and flexibility, the two types of cables both use magnesium oxide as insulation, and the rigid fireproof cables are formed by wrapping copper pipes outside the rigid fireproof cables and then tightly pressing the copper pipes through a plurality of drawing procedures; the flexible fireproof cable is rolled into a spiral shape outside the rigid cable copper pipe. The rigid fireproof cable is a first-generation product, and the flexible fireproof cable is a second-generation product. The two cables are applied to the market for many years, but with the development of times and technological progress, the cable in the prior art cannot meet the requirement of the development of the modernization process, such as the multi-core long-length cables in places such as skyscrapers, tunnels, airports and the like are increasingly required, the fire resistance time of the cables is required to be long, and the cables cannot meet the modern requirement by the original old process for production.
However, the rigid fireproof cable is inconvenient to construct due to the hard texture of the cable, the bending degree of the flexible cable is small, the inner insulation is formed by compressing magnesium oxide, and the inner insulation is easy to crack during bending, so that the cable in the prior art cannot meet the requirement of the development of the modernization process.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a self-adaptive rigid-flexible dual-state fireproof cable, which firstly transmits the external high temperature to the interior of a thermosetting filling liquid through a heat-conducting gas-filtering soft wire rate under the high-temperature environment of a fire disaster, so that the moisture in the thermosetting filling liquid is heated and evaporated, water molecules are transmitted to the external through the heat-conducting gas-filtering soft wire, the thermosetting filling liquid is sintered to be solid under the action of high temperature after losing water, in the process, on one hand, the external temperature is consumed, the moisture in the thermosetting filling liquid is promoted to be evaporated, meanwhile, the water vapor evaporated to the external plays a certain flame retardant role on the external fire environment of a cable core, on the other hand, after the thermosetting filling liquid is sintered to be solid under the water loss, a high-strength fireproof heat-resistant protective barrier is formed on the cable core, the cable core is effectively protected, and meanwhile, the cable at the position, the fire protection of the fire-fighting protection device is automatically realized, and the damage condition of the fire-fighting protection device in a fire disaster can be quickly judged and detected at the later stage.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A self-adaptive rigid-flexible dual-state fireproof cable comprises a cable core, wherein a flexible insulating sheath is sleeved on the outer side of the cable core, an inner liquid separation sleeve, an outer liquid separation sleeve and a heat insulation protective layer are sequentially arranged between the cable core and the flexible insulating sheath from inside to outside, the inner surface of the inner liquid separation sleeve is fixedly connected with the outer surface of the cable core, the heat insulation protective layer is fixedly connected between the flexible insulating sheath and the outer liquid separation sleeve, thermosetting filling liquid is filled between the inner liquid separation sleeve and the outer liquid separation sleeve, a plurality of uniformly distributed heat conduction air filtering soft wires are fixedly connected inside the outer liquid separation sleeve, the inner ends of the heat conduction air filtering soft wires penetrate through the outer liquid separation sleeve and extend into the thermosetting filling liquid, the outer ends of the heat conduction air filtering soft wires sequentially penetrate through the outer liquid separation sleeve and the heat insulation protective layer and are in contact with the flexible insulating sheath, and the inner liquid separation sleeve and the outer liquid separation sleeve are both made of flexible materials, the heat insulation protective layer adopts high temperature resistant ceramic fiber cloth, the invention firstly transmits the external high temperature to the interior of the thermosetting filling liquid through the heat conduction gas filtration soft silk rate under the high temperature environment of fire hazard, thus promoting the water in the thermosetting filling liquid to be heated and evaporated, the water molecules are transmitted to the external through the heat conduction gas filtration soft silk, the thermosetting filling liquid is sintered into solid under the high temperature action after losing water, in the process, on one hand, the external temperature is consumed, the water evaporation in the thermosetting filling liquid is promoted, meanwhile, the water vapor evaporated to the external plays a certain flame retardant role to the fire environment outside the cable core, on the other hand, after the thermosetting filling liquid is sintered into solid after losing water, a high-strength fireproof heat-resistant protective screen is formed on the cable core, the cable core is effectively protected, meanwhile, the cable at the position is changed from the original flexible state into the rigid state, thereby automatically realizing the fireproof protection to the, and the damage condition of the fire disaster monitoring system in the later period can be conveniently and rapidly judged and detected.
Furthermore, the filling rate of the thermosetting filling liquid between the inner liquid-isolating sleeve and the outer liquid-isolating sleeve is 85% -90%, and the unsaturated filling mode is adopted, so that the flexible state of the heat-conducting air-filtering soft filament is kept under the normal state, on the one hand, the heat-conducting air-filtering soft filament is not easy to cause the conditions of difficult bending, even fracture and leakage and the like due to transitional saturation of the thermosetting filling liquid in the bending use process, on the other hand, the thermosetting filling liquid is formed by mixing aluminate cement slurry and a plurality of capacity-expanding capsules, the granularity of the aluminate cement slurry is 2mm-3mm, the aluminate cement slurry is high-fire-resistant cement, the fire resistance is more than 1500 ℃, the water in the aluminate cement slurry cannot evaporate in the normal use process, the high-water content is realized, the flowing state can be kept, the heat-conducting air-filtering soft filament is in the flexible state, and when the interior of the heat-conducting air, the external high temperature is transmitted to the inside of the aluminate cement slurry through the heat-conducting air-filtering soft wire, the water of the aluminate cement slurry is evaporated and transmitted to the outside through the heat-conducting air-filtering soft wire, the external temperature is reduced, meanwhile, the aluminate cement slurry is in a solid state by liquid state sintering and is wrapped on the outer side of the inner spacer sleeve to form a fireproof heat-resistant protective screen, and the fireproof protection is realized on the cable core.
Furthermore, the capacity expansion capsule comprises an encapsulating bag, decomposition particles are filled in the encapsulating bag, the decomposition particles are ammonium bicarbonate particles or ammonium carbonate particles, the thermosetting filling liquid is in an unsaturated filling state, in order to ensure that the thermosetting filling liquid can fully and completely wrap the outer side of the inner liquid isolating sleeve in the dehydration sintering process, the capacity expansion capsule is added in the aluminate cement slurry, in the drying sintering process of the aluminate cement slurry, the encapsulating bag is heated and melted, the decomposition particles are heated and decomposed to generate gas, large gaps are formed in the aluminate cement slurry, the aluminate cement slurry is sintered to form a porous solid layer, the volume of the aluminate cement slurry is enlarged, and the sintered aluminate cement slurry is fully filled between the inner liquid isolating sleeve and the outer liquid isolating sleeve to form a complete fire-resistant barrier.
Furthermore, the heat-conducting gas-filtering soft wire comprises a microporous filter bag positioned on the outer layer, a sealing fusible filler is filled in the microporous filter bag, the capsule and the sealing fusible filler are made of polyethylene materials with low melting points, the sealing fusible filler and the capsule can be rapidly melted under the influence of high temperature in a fire environment, after the sealing fusible filler is melted, the external high temperature can be transmitted to the inside of the aluminate cement slurry through the inside of the microporous filter bag, meanwhile, moisture in the aluminate cement slurry can enter the inside of the microporous filter bag to be evaporated outwards, gas generated by decomposing particles can be conveniently dispersed after the capsule is melted, and pores are formed in the aluminate cement slurry.
Furthermore, the microporous filter bag is made of long glass fiber filler, the aperture of the microporous filter bag is 0.5mm-1mm, the long glass fiber filler has good high temperature resistance, and can be normally used for a long time in a fire environment, so that the aluminate cement slurry has enough time to be dried and sintered, and the microporous filter bag can allow water molecules to pass through and simultaneously prevent the aluminate cement slurry from entering.
Furthermore, the inner part of the outer liquid-isolating sleeve is fixedly connected with a plurality of sectional heat-isolating rings, the heat-conducting gas-filtering soft wires are respectively and evenly distributed between a pair of sectional heat-isolating rings which are close to each other, the sectional heat-isolating rings play a role in isolating heat in the heat-conducting gas-filtering soft wires from being transversely released outwards, on one hand, the heat is greatly transferred to the thermosetting filling liquid, on the other hand, the heat transferred by the heat-conducting gas-filtering soft wires is not easy to influence the surrounding outer liquid-isolating sleeve, and the thermosetting filling liquid is convenient to dry and sinter between the inner liquid-isolating sleeve and the outer liquid-isolating sleeve.
Furthermore, the distance between the adjacent pair of the segmented heat insulation rings at a close distance is 7cm-10cm, and the distance between the adjacent pair of the segmented heat insulation rings at a far distance is 40cm-60 cm.
Furthermore, a plurality of uniformly distributed segmental choking rings are fixedly connected between the inner liquid isolating sleeve and the outer liquid isolating sleeve, the segmental choking rings are made of flexible silicon rubber materials, the distance between each two adjacent segmental choking rings is 1m-1.5m, and the segmental choking rings have a separation effect on the thermosetting filling liquid, so that the thermosetting filling liquid is in a local sintering state, namely: the drying and sintering process of the thermosetting filling liquid occurs at the fire involved part, so that high temperature is not easy to spread in a large range in the thermosetting filling liquid, temperature loss is caused, the thermosetting filling liquid at the fire involved part can be rapidly sintered and solidified, and timely and effective protection is realized on cable cores.
Furthermore, an outer-base fireproof layer is arranged on the outer surface of the flexible insulating sheath, the outer-base fireproof layer is formed by spraying fireproof paint, and the outer-base fireproof layer is used as a fireproof means on the basis of the flexible insulating sheath, so that the service life of the flexible insulating sheath at high temperature is effectively prolonged.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) in the scheme, under the high-temperature environment of fire, external high temperature is firstly transmitted to the interior of the thermosetting filling liquid through the heat-conducting gas-filtering soft wire rate, so that water in the thermosetting filling liquid is heated and evaporated, water molecules are transmitted to the external through the heat-conducting gas-filtering soft wire, the thermosetting filling liquid is sintered into a solid under the action of high temperature after losing water, in the process, on one hand, the outside temperature is consumed, the evaporation of the water in the thermosetting filling liquid is promoted, and simultaneously, the water vapor evaporated to the outside plays a certain flame retardant role to the fire environment outside the cable core, on the other hand, after the thermosetting filling liquid is dehydrated and sintered into a solid, a high-strength fireproof heat-resistant protective barrier is formed on the cable core, the cable core is effectively protected, and meanwhile, the cable at the position is changed from an original flexible state to a rigid state, so that the self fireproof protection is automatically realized, and the damage condition of the cable in a fire disaster can be quickly judged and detected at a later stage.
(2) The filling rate of the thermosetting filling liquid between the inner liquid-isolating sleeve and the outer liquid-isolating sleeve is 85-90%, by adopting an unsaturated filling mode, on one hand, the flexible state of the heat-insulating filling liquid is kept under a normal state, on the other hand, the heat-insulating filling liquid is not easy to bend, even break and leak liquid and the like caused by transitional saturation of the thermosetting filling liquid in the bending use process, the thermosetting filling liquid is formed by mixing aluminate cement slurry and a plurality of capacity-expanding capsules, the granularity of the aluminate cement slurry is 2mm-3mm, the aluminate cement slurry is high-fire-resistant cement, the fire resistance is more than 1500 ℃, in the normal use process, the moisture in the aluminate cement slurry cannot be evaporated, the aluminate cement slurry has higher moisture content and can be kept in a flowing state, when the heat-conducting gas-filtering soft filaments are influenced by high temperature and the inside is melted, the external high temperature is transferred to the inside of the aluminate cement slurry through the heat-conducting gas-filtering soft filaments, the water of the aluminate cement slurry is evaporated and is transferred to the outside through the heat-conducting air-filtering soft wires, the outside temperature is reduced, meanwhile, the aluminate cement slurry is sintered from a liquid state to a solid state and is wrapped on the outer side of the inner liquid-isolating sleeve to form a fireproof and heat-resistant protective screen, and the fireproof protection is realized on the cable core.
(3) The expansion capsule comprises a capsule, decomposition particles are filled in the capsule, the decomposition particles are ammonium bicarbonate particles or ammonium carbonate particles, the thermosetting filling liquid is in an unsaturated filling state, in order to ensure that the thermosetting filling liquid can be fully and completely wrapped on the outer side of the inner liquid separation sleeve in the dehydration sintering process, the expansion capsule is added in the aluminate cement slurry, the capsule is heated and melted in the drying sintering process of the aluminate cement slurry, the decomposition particles are heated and decomposed to generate gas, larger gaps are formed in the aluminate cement slurry, the aluminate cement slurry is sintered to form a porous solid layer, the volume of the aluminate cement slurry is expanded, and the sintered aluminate cement slurry is fully filled between the inner liquid separation sleeve and the outer liquid separation sleeve to form a complete fire-resistant barrier.
(4) The heat-conducting gas-filtering soft filament comprises a microporous filter bag positioned on the outer layer, a sealing fusible filler is filled in the microporous filter bag, the capsule and the sealing fusible filler are made of polyethylene materials with low melting points, the sealing fusible filler and the capsule can be quickly melted under the influence of high temperature in a fire environment, after the sealing fusible filler is melted, external high temperature can be transmitted to the inside of aluminate cement slurry through the inside of the microporous filter bag, meanwhile, moisture in the aluminate cement slurry can enter the inside of the microporous filter bag to be evaporated outwards, gas generated by decomposing particles can be conveniently dispersed after the capsule is melted, and pores are formed in the aluminate cement slurry.
(5) The microporous filter bag is made of long glass fiber filler, the aperture of the microporous filter bag is 0.5mm-1mm, the long glass fiber filler has good high temperature resistance, and can be normally used for a long time in a fire environment, so that the aluminate cement slurry has enough time to carry out a drying and sintering process, and the microporous filter bag can allow water molecules to pass through and simultaneously prevent the aluminate cement slurry from entering.
(6) The inside of outer liquid proof cover is a plurality of sections of fixedly connected with heat insulating ring still, a plurality of heat conduction gas filtration soft silks evenly distributed respectively between a pair of sections heat insulating ring that the distance is nearer, the heat insulating ring of subsection plays the effect that the heat in the heat conduction gas filtration soft silk transversely outwards releases of separation, make the great degree of heat transfer to the thermosetting filler liquid on the one hand, on the other hand, the heat that makes the heat conduction gas filtration soft silk transfer is difficult for causing the influence to outer liquid proof cover on every side, make things convenient for the thermosetting filler liquid including between liquid proof cover and outer liquid proof cover dry sintering.
(7) A plurality of evenly distributed segmental choking rings are fixedly connected between the inner liquid isolating sleeve and the outer liquid isolating sleeve, the segmental choking rings are made of flexible silicon rubber materials, the distance between each two adjacent segmental choking rings is 1m-1.5m, and the segmental choking rings play a role in separating thermosetting filling liquid, so that the thermosetting filling liquid is in a local sintering state, namely: the drying and sintering process of the thermosetting filling liquid occurs at the fire involved part, so that high temperature is not easy to spread in a large range in the thermosetting filling liquid, temperature loss is caused, the thermosetting filling liquid at the fire involved part can be rapidly sintered and solidified, and timely and effective protection is realized on cable cores.
(8) The outer surface of the flexible insulating sheath is provided with an outer-base fireproof layer, the outer-base fireproof layer is formed by spraying fireproof paint, and the outer-base fireproof layer is used as a fireproof means on the basis of the flexible insulating sheath, so that the service life of the flexible insulating sheath at high temperature is effectively prolonged.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic side view of a portion of the present invention;
FIG. 3 is a schematic diagram of the construction of the thermoset filler fluid of the present invention;
FIG. 4 is a schematic view of a partial front structure of the heat-conducting air-filtering soft filament according to the present invention;
fig. 5 is a schematic structural view of the heat-conducting air-filtering soft wire according to the present invention when the heat-conducting air-filtering soft wire is internally melted.
The reference numbers in the figures illustrate:
1 cable core, 2 inner liquid-insulating sleeves, 3 thermosetting filling liquid, 31 aluminate cement paste, 32 capsules, 4 outer liquid-insulating sleeves, 5 heat-insulating protective layers, 6 flexible insulating protective sleeves, 7 heat-conducting air-filtering soft wires, 71 microporous filter capsules, 72 sealing fusible fillers, 8 outer base fireproof layers, 9 segmental heat-insulating rings and 10 segmental choke rings.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1 and 2, a self-adaptive rigid-flexible dual-state fireproof cable comprises a cable core 1, a flexible insulating sheath 6 is sleeved outside the cable core 1, an inner liquid-isolating sleeve 2, an outer liquid-isolating sleeve 4 and a heat-insulating protective layer 5 are sequentially arranged between the cable core 1 and the flexible insulating sheath 6 from inside to outside, the inner surface of the inner liquid-isolating sleeve 2 is fixedly connected with the outer surface of the cable core 1, the heat-insulating protective layer 5 is fixedly connected between the flexible insulating sheath 6 and the outer liquid-isolating sleeve 4, a thermosetting filling liquid 3 is filled between the inner liquid-isolating sleeve 2 and the outer liquid-isolating sleeve 4, a plurality of uniformly distributed heat-conducting air-filtering soft filaments 7 are fixedly connected inside the outer liquid-isolating sleeve 4, the inner ends of the heat-conducting air-filtering soft filaments 7 penetrate through the outer liquid-isolating sleeve 4 and extend into the thermosetting filling liquid 3, the outer ends of the heat-conducting air-filtering soft filaments 7 sequentially penetrate through the outer liquid-isolating sleeve 4 and the heat-insulating protective layer 5 and contact with the flexible insulating sheath 6, the heat insulation protective layer 5 is made of high-temperature-resistant ceramic fiber cloth, the heat insulation protective layer 5 is used for protecting the outer liquid-insulating sleeve 4, the normal use time of the outer liquid-insulating sleeve 4 at high temperature is prolonged, the thermosetting filling liquid 3 can be dried and sintered conveniently at high temperature, the outer surface of the flexible insulating sheath 6 is provided with the outer-base fireproof layer 8, the outer-base fireproof layer 8 is formed by spraying fireproof paint, and the outer-base fireproof layer 8 is used as a fireproof means on the basis of the heat insulation protective layer, so that the use time of the heat insulation protective layer at high temperature is effectively prolonged.
The filling rate of the thermosetting filling liquid 3 between the inner liquid-isolating sleeve 2 and the outer liquid-isolating sleeve 4 is 85%, by adopting an unsaturated filling mode, on one hand, the invention is kept in a flexible state under a normal state, on the other hand, the invention is not easy to cause bending difficulty, even fracture and leakage and the like due to transitional saturation of the thermosetting filling liquid 3 in the bending use process, please refer to fig. 3, the thermosetting filling liquid 3 is formed by mixing aluminate cement slurry 31 and a plurality of expansion capsules, the granularity of the aluminate cement slurry 31 is 2.5mm, the aluminate cement slurry 31 is high-fire-resistant cement, the fire resistance is more than 1500 ℃, in the normal use process, the water in the aluminate cement slurry 31 can not be evaporated, the aluminate cement slurry has high water content, the flowing state can be kept, the invention is in the flexible state, when the heat-conducting gas-filtering soft filaments 7 are influenced by high temperature and the inside is melted, the external high temperature is transmitted to the inside of the aluminate cement slurry 31 through the heat-conducting gas-filtering soft wire 7, the water of the aluminate cement slurry 31 is evaporated and transmitted to the outside through the heat-conducting gas-filtering soft wire 7, the external temperature is reduced, meanwhile, the aluminate cement slurry 31 is solid by liquid sintering and is wrapped on the outer side of the inner liquid-isolating sleeve 2 to form a fireproof and heat-resistant protective barrier, the cable core 1 is protected from fire, the dilatation capsule comprises a capsule 32, decomposition particles are filled in the capsule 32, the decomposition particles adopt ammonium bicarbonate particles or ammonium carbonate particles, because the thermosetting filling liquid 3 is in an unsaturated filling state, in order to ensure that the thermosetting filling liquid 3 can be fully and completely wrapped on the outer side of the inner liquid-isolating sleeve 2 in the water-loss sintering process, the dilatation capsule is added in the aluminate cement slurry 31, in the drying and sintering process of the aluminate cement slurry 31, the capsule 32 is heated and, large gaps are formed in the aluminate cement slurry 31, so that the aluminate cement slurry 31 is sintered into a porous solid layer, the volume of the aluminate cement slurry 31 is enlarged, and the sintered aluminate cement slurry 31 is fully filled between the inner liquid-isolating sleeve 2 and the outer liquid-isolating sleeve 4 to form a complete fire-resistant barrier.
Referring to fig. 4 and 5, the heat-conducting gas-filtering soft filament 7 includes a microporous filter bag 71 located at an outer layer, a sealing fusible filler 72 is filled inside the microporous filter bag 71, the capsule 32 and the sealing fusible filler 72 are made of a polyethylene material with a low melting point, in a fire environment, the sealing fusible filler 72 and the capsule 32 can be rapidly melted under the influence of high temperature, after the sealing fusible filler 72 is melted, the external high temperature can be transmitted to the inside of the aluminate cement slurry 31 through the inside of the microporous filter bag 71, meanwhile, moisture in the aluminate cement slurry 31 can enter the inside of the microporous filter bag 71 to be evaporated outwards, after the capsule 32 is melted, gas generated by decomposing particles can be conveniently emitted, pores are formed inside the aluminate cement slurry 31, the microporous filter bag 71 is made of a glass long fiber, the pore size of the microporous filter bag 71 is 1mm, the glass long fiber has good high temperature resistance, and can be normally used for a long time in the fire environment, aluminate cement slurry 31 is allowed sufficient time for the dry sintering process and microporous filter capsules 71 may allow water molecules to pass through while blocking the ingress of aluminate cement slurry 31.
Referring to fig. 2, a plurality of segmented heat insulation rings 9 are fixedly connected inside the outer liquid-insulating sleeve 4, a plurality of heat-conducting air-filtering soft wires 7 are respectively and uniformly distributed between a pair of segmented heat insulation rings 9 which are close to each other, the distance between the adjacent pair of segmented heat insulation rings 9 which are close to each other is 10cm, the distance between the adjacent pair of segmented heat insulation rings 9 which are far from each other is 55cm, and the segmented heat insulation rings 9 play a role in preventing heat in the heat-conducting air-filtering soft wires 7 from being transversely and outwardly released, so that on one hand, the heat is greatly transferred to the thermosetting filling liquid 3, on the other hand, the heat transferred by the heat-conducting air-filtering soft wires 7 is not easy to affect the surrounding outer liquid-insulating sleeve 4, and the thermosetting filling liquid 3 is conveniently dried and sintered between the inner liquid-insulating sleeve 2 and the outer liquid-insulating sleeve 4.
Referring to fig. 2, a plurality of uniformly distributed segmented choke rings 10 are fixedly connected between an inner liquid-separating sleeve 2 and an outer liquid-separating sleeve 4, the segmented choke rings 10 are made of flexible silicone rubber material, the silicone rubber material has good high temperature resistance and heat insulation performance, the distance between a pair of adjacent segmented choke rings 10 is 1.2m, and the segmented choke rings 10 separate a thermosetting filling liquid 3, so that the thermosetting filling liquid 3 is in a local sintering state, that is: the drying and sintering process of the thermosetting filling liquid 3 occurs at the fire involved part, so that high temperature is not easy to spread in a large range in the thermosetting filling liquid 3 to cause temperature loss, the thermosetting filling liquid 3 at the fire involved part can be rapidly sintered and solidified, and the cable core 1 is timely and effectively protected.
In the invention, under the high-temperature environment of fire, the external high temperature is firstly transmitted to the interior of the thermosetting filler liquid 3 through the heat-conducting gas-filtering soft wire 7, so that the moisture in the thermosetting filler liquid 3 is heated and evaporated, the water molecules are transmitted to the external through the heat-conducting gas-filtering soft wire 7, the thermosetting filler liquid 3 is sintered into a solid under the action of high temperature after losing water, in this process, on the one hand, the outside temperature is consumed to promote the evaporation of the moisture in the thermosetting filler liquid 3, and at the same time, the water vapor evaporated to the outside plays a certain role in flame retardance for the fire environment outside the cable core 1, on the other hand, after the thermosetting filling liquid 3 is dehydrated and sintered into a solid, a high-strength fireproof heat-resistant protective barrier is formed on the cable core 1, the cable core 1 is effectively protected, and meanwhile, the cable at the position is changed from an original flexible state to a rigid state, so that the self fireproof protection is automatically realized, and the damage condition of the cable in a fire disaster can be quickly judged and detected at a later stage.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a soft binary state fireproof cable of self-adaptation, includes cable core (1), the outside cover of cable core (1) has flexible insulating sheath (6), its characterized in that: the cable comprises a cable core (1) and a flexible insulating sheath (6), wherein an inner liquid-separating sleeve (2), an outer liquid-separating sleeve (4) and a heat-insulating protective layer (5) are sequentially arranged between the cable core (1) and the flexible insulating sheath (6) from inside to outside, the inner surface of the inner liquid-separating sleeve (2) is fixedly connected with the outer surface of the cable core (1), the heat-insulating protective layer (5) is fixedly connected between the flexible insulating sheath (6) and the outer liquid-separating sleeve (4), thermosetting filling liquid (3) is filled between the inner liquid-separating sleeve (2) and the outer liquid-separating sleeve (4), a plurality of heat-conducting air-filtering soft wires (7) are fixedly connected inside the outer liquid-separating sleeve (4) and extend into the thermosetting filling liquid (3), the outer ends of the heat-conducting air-filtering soft wires (7) sequentially penetrate through the outer liquid-separating sleeve (4) and the heat-insulating protective layer (5) and are contacted with the flexible insulating sheath (6), the inner liquid-proof sleeve (2) and the outer liquid-proof sleeve (4) are both made of flexible materials, and the heat-insulating protective layer (5) is made of high-temperature-resistant ceramic fiber cloth.
2. The adaptive rigid-flexible bi-state fireproof cable of claim 1, wherein: the filling rate of the thermosetting filling liquid (3) between the inner liquid-isolating sleeve (2) and the outer liquid-isolating sleeve (4) is 85% -90%, the thermosetting filling liquid (3) is formed by mixing aluminate cement slurry (31) and a plurality of dilatation capsules, and the granularity of the aluminate cement slurry (31) is 2mm-3 mm.
3. An adaptive rigid-flexible bi-state fireproof cable according to claim 2, wherein: the flash-expandable capsule comprises a capsule (32), wherein the interior of the capsule (32) is filled with decomposition particles, and the decomposition particles adopt ammonium bicarbonate particles or ammonium carbonate particles.
4. An adaptive rigid-flexible bi-state fireproof cable according to claim 3, wherein: the heat-conducting air-filtering soft wire (7) comprises a microporous filtering bag (71) positioned at the outer layer, the interior of the microporous filtering bag (71) is filled with a sealing fusible filler (72), and the capsule (32) and the sealing fusible filler (72) both adopt a low-melting-point polyethylene material.
5. An adaptive rigid-flexible bi-state fireproof cable according to claim 4, wherein: the microporous filtering bag (71) is made of glass long fiber, and the aperture of the microporous filtering bag (71) is 0.5mm-1 mm.
6. The adaptive rigid-flexible bi-state fireproof cable of claim 1, wherein: the inside of outer spacer sleeve (4) still fixedly connected with a plurality of sections heat insulating ring (9), it is a plurality of heat conduction gas filtration soft silk (7) evenly distributed respectively between a pair of section heat insulating ring (9) that the distance is nearer.
7. An adaptive rigid-flexible bi-state fireproof cable according to claim 6, wherein: the distance between the adjacent pair of the segmental heat insulation rings (9) at a close distance is 7cm-10cm, and the distance between the adjacent pair of the segmental heat insulation rings (9) at a far distance is 40cm-60 cm.
8. The adaptive rigid-flexible bi-state fireproof cable of claim 1, wherein: a plurality of uniformly distributed segmental choke rings (10) are fixedly connected between the inner liquid isolating sleeve (2) and the outer liquid isolating sleeve (4), the segmental choke rings (10) are made of flexible silicon rubber materials, and the distance between each adjacent pair of segmental choke rings (10) is 1-1.5 m.
9. The adaptive rigid-flexible bi-state fireproof cable of claim 1, wherein: the outer surface of the flexible insulating sheath (6) is provided with an outer base fireproof layer (8), and the outer base fireproof layer (8) is formed by spraying fireproof paint.
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| CN112700920B (en) | 2022-02-22 |
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