CN112582102B - Seepage-proofing self-healing underground embedded cable sheath - Google Patents
Seepage-proofing self-healing underground embedded cable sheath Download PDFInfo
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- CN112582102B CN112582102B CN202011412983.1A CN202011412983A CN112582102B CN 112582102 B CN112582102 B CN 112582102B CN 202011412983 A CN202011412983 A CN 202011412983A CN 112582102 B CN112582102 B CN 112582102B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- 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
Abstract
The invention discloses an anti-seepage self-healing underground pre-buried cable sheath, which belongs to the technical field of cables, and is characterized in that an inner sheath and an outer sheath are arranged inside and outside the cable sheath, a plurality of repairing embedded bodies are embedded and installed on the inner sheath, when the outer end wall of the outer sheath cracks, external water vapor permeates into the outer sheath, a water-soluble heat bag on the repairing embedded bodies is dissolved in water to expose reducing iron powder inside the water-soluble heat bag, the reducing iron powder generates heat when meeting air and transmits the heat to a thermal expansion filling layer, the thermal expansion filling layer expands when being heated to extrude an elastic discharging bag embedded inside the water-soluble heat bag, so that the repairing material inside the elastic discharging bag is led out outwards, the led-out repairing material fills and repairs the crack position of the outer sheath through a hydrolysis heat storage layer, the self-repairing of the damaged position is completed, the self-healing capacity of the outer sheath is realized, and the leakage problem of the cable sheath in the upper time is effectively avoided, is beneficial to the long-acting safe use of the cable.
Description
Technical Field
The invention relates to the technical field of cables, in particular to an anti-seepage self-healing underground embedded cable sheath.
Background
The electric wire and cable is used for transmitting electric (magnetic) energy, information and wire products for realizing electromagnetic energy conversion, the generalized electric wire and cable is also called as cable for short, the narrow cable is insulated cable, it can be defined as aggregate composed of following parts, one or more insulated wire cores, and their respective possible coating layer, total protective layer and outer protective layer, the cable can also have additional uninsulated conductor, with the development of electric power and energy industry, various cables are more and more applied to various fields of production and living, and generally buried underground or laid in cable trench.
The cable that buries underground or get into cable pit and lay is in installation or use in the abominable place, if receive mechanical stress or other forms damage back, the sheath of its terminal surface is easily caused the damage, and when the sheath take place the crackle and damaged the back, underground steam immerses in the cable, can cause the corruption of cable insulation layer for a long time, and the cable trouble shared proportion that arouses because of insulating layer ageing damage etc. is the biggest in the cable accident, is unfavorable for the long-term safe handling of cable.
Therefore, the anti-seepage self-healing underground embedded cable sheath is provided to effectively solve the problems in the prior art.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide an anti-seepage self-healing underground embedded cable sheath, which is characterized in that an inner sheath and an outer sheath are arranged on the inner sheath, a plurality of repairing embedded bodies are embedded and installed on the inner sheath, when the outer end wall of the outer sheath cracks, external water vapor permeates into the outer sheath, a water-soluble heat release bag on the repairing embedded bodies dissolves and exposes reductive iron powder in the water, the reductive iron powder reacts with air to generate heat and transmits the heat to a thermal expansion filling layer, the thermal expansion filling layer expands by heating to extrude an elastic discharging bag embedded in the thermal expansion filling layer, so that a repairing material in the elastic discharging bag is led out, the led repairing material penetrates through the hydrolysis heat storage layer to fill and repair the cracks on the outer sheath, the self-healing of the damaged part is completed, the self-healing capacity of the outer sheath is realized, and the leakage problem of the cable sheath in the upper time is effectively avoided, is beneficial to the long-acting safe use of the cable.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
An anti-seepage self-healing underground embedded cable sheath comprises an inner sheath sleeved outside a cable insulation layer, wherein an outer sheath is wrapped outside the inner sheath, a plurality of repairing material filling cavities are formed in the end face of the outer side wall of the inner sheath, a plurality of repairing material filling cavities are filled with repairing materials, an outer end wall of the repairing material filling cavity is connected with the inner end wall of the outer sheath in a sealing mode, the repairing material filling cavity comprises repairing materials filled in the repairing material filling cavities, a closed diaphragm used for sealing the repairing materials is arranged in the repairing material filling cavity, a thermal expansion filling layer is arranged inside the upper end of the closed diaphragm, a plurality of elastic discharging bags are embedded in the thermal expansion filling layer, the bottom ends of the elastic discharging bags are communicated with the interior of the repairing materials through flexible material guide rods, and a hydrolysis heat storage layer which is connected with the inner wall of the outer sheath in a sealing mode is covered on the upper end of the thermal expansion filling layer, the hydrolysis heat storage layer comprises a flexible interlayer coated on the outer end wall of the thermal expansion filling layer, a plurality of water-soluble heat release bags are embedded and mounted on the flexible interlayer, and reducing iron powder is filled in the water-soluble heat release bags.
Furthermore, the plurality of repair material filling cavities are of an oval structure with a narrow inner part and a wide outer part, and the plurality of repair material filling cavities are arranged adjacently after ending.
Furthermore, the repairing material is prepared by mixing and proportioning the flame-retardant polyurethane insulating resin, the rubber binder and water, wherein the mass ratio of the flame-retardant polyurethane insulating resin to the rubber binder to the water is 2:1:1, the flame-retardant polyurethane insulating resin has the characteristics of quick room temperature curing, low curing stress, good sealing performance, impact resistance, good water resistance, convenience in construction and the like, and the repaired sealing part or air leakage part is not influenced by water, oil, salt and other pollutants.
Furthermore, a plurality of material permeating holes are formed in the flexible interlayer, the water-soluble heat-release bag is embedded and bonded in the material permeating holes, and after the water-soluble heat-release bag is dissolved in water, the material permeating holes are exposed, so that the repairing material guided from the bottom of the repairing material filling cavity can seep outwards through the material permeating holes to repair the cracks.
Furthermore, the water-soluble heat release bag is the cavity hydrolysis bag skin of filling in the feed seepage hole, the hydrolysis bag skin adopts water-soluble material to make, and after outside steam permeated the outer jacket inside through the crackle, the hydrolysis bag skin was hydrolysised to naked exposure reducing iron powder, reducing iron powder met the air and generated heat, realized the thermal energy of thermal expansion filling layer with this, extrude the elasticity ejection of compact bag of locating inside behind the thermal expansion filling layer thermal expansion to extrude the mending material of elasticity ejection of compact bag inside.
Furthermore, the thermal expansion filling layer is made of thermal expansion materials, a plurality of thermal expansion holes used for filling and embedding the elastic discharge bags are formed in the thermal expansion filling layer, and the top end of the thermal expansion filling layer is abutted against the bottom end of the flexible interlayer.
Furthermore, elasticity ejection of compact bag is including locating the downthehole elasticity utricule of thermal expansion, elasticity utricule adopts high elastic material to make, seted up a plurality of discharge openings on the wall of elasticity utricule top, after elasticity ejection of compact bag received the extrusion, its inside elasticity ejection of compact bag oozes through a plurality of discharge openings to this is repaired to the crackle of outer sheath department.
Furthermore, a material guiding fiber penetrating through the inside and the outside of the discharge hole is inserted at the discharge hole, a plurality of fluff is distributed on the material guiding fiber, and the material guiding fiber has a certain length and plays a certain drainage role after the mending material is exuded.
Furthermore, the elastic capsule body is coated with a flexible magnetic absorption layer, and the repair material is doped with magnetic particles.
A use method of an anti-seepage self-healing underground embedded cable sheath comprises the following steps:
s1, when the outer sheath is broken due to crack, the underground water-containing air and underground water are immersed into the outer sheath through the crack, the water-soluble heat-release bag on the hydrolysis heat-storage layer between the outer sheath and the inner sheath is dissolved by water to expose the reducing iron powder in the water-soluble heat-release bag, and the material seepage hole is exposed;
s2, generating heat when the reducing iron powder meets air, and performing thermal expansion reaction when the thermal expansion filling layer meets heat, so that the elastic discharge bag embedded in the elastic discharge bag is subjected to thermal expansion extrusion, the repair material in the elastic discharge bag is extruded and seeps out through the discharge hole, and the cracks are repaired through the disintegrated seepage hole;
s3, the flexible magnetic absorption layer attached to the inner side of the elastic discharging bag plays a role in guiding the repair material at the bottom of the repair material filling cavity, so that a certain amount of repair material is stored in the elastic discharging bag all the time to provide more repair materials.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) according to the scheme, the inner sheath and the outer sheath are arranged on the inner sheath, the plurality of repairing embedded bodies are embedded and installed on the inner sheath, when cracks are generated on the outer end wall of the outer sheath, external water vapor permeates into the outer sheath, the water-soluble heat bag on the repairing embedded body is dissolved in water to expose the reducing iron powder inside the water-soluble heat bag, the reducing iron powder reacts with air to generate heat and conducts the heat to the thermal expansion filling layer, the thermal expansion filling layer expands when being heated to extrude the elastic discharging bag embedded inside the elastic discharging bag, so that the repairing material inside the elastic discharging bag is led out outwards, the led repairing material penetrates through the hydrolysis heat storage layer to fill and repair the cracks at the outer sheath, the self-repairing of the damaged part is completed, the self-healing capacity of the outer sheath is realized, the leakage problem of the cable sheath in the last time is effectively avoided, and the safe use of the cable is facilitated.
(2) The plurality of repair material filling cavities are of oval structures with narrow inner parts and wide outer parts, the tails of the plurality of repair material filling cavities are arranged adjacently, and the repair embedding bodies are embedded in the repair material filling cavities so that any damaged part of the outer sheath can be repaired accurately.
(3) The repairing material is prepared by mixing and proportioning flame-retardant polyurethane insulating resin, a rubber binder and water, wherein the mass ratio of the flame-retardant polyurethane insulating resin to the rubber binder to the water is 2:1:1, the flame-retardant polyurethane insulating resin has the characteristics of quick room-temperature curing, low curing stress, good sealing performance, good impact resistance, good water resistance, convenient construction and the like, and the repaired sealing position or air leakage position is not influenced by water, oil, salt and other pollutants.
(4) The flexible interlayer is provided with a plurality of infiltration material holes, the water-soluble heat-release bag is embedded and bonded in the infiltration material holes, and after the water-soluble heat-release bag is dissolved in water, the infiltration material holes are exposed, so that the repair material guided from the bottom of the repair material filling cavity can seep outwards through the infiltration material holes to repair the cracks.
(5) The water-soluble heat release bag is a hollow hydrolysis bag skin filled in the material seepage holes, the hydrolysis bag skin is made of water-soluble materials, when external water vapor permeates into the inner side of the outer sheath through cracks, the hydrolysis bag skin is hydrolyzed, so that reducing iron powder is exposed, the reducing iron powder generates heat when meeting air, the thermal expansion of the thermal expansion filling layer is realized, the elastic discharge bag embedded in the thermal expansion filling layer is extruded after the thermal expansion filling layer thermally expands, and the repair materials in the elastic discharge bag are extruded.
(6) The thermal expansion filling layer is made of thermal expansion materials, a plurality of thermal expansion holes used for filling and embedding the elastic discharge bags are formed in the thermal expansion filling layer, and the top ends of the thermal expansion filling layers are abutted against the bottom end of the flexible interlayer.
(7) The elastic discharging bag comprises an elastic bag body arranged in the thermal expansion hole, the elastic bag body is made of high-elasticity materials, a plurality of discharging holes are formed in the top end wall of the elastic bag body, and after the elastic discharging bag is extruded, the elastic discharging bag inside the elastic discharging bag seeps out through the plurality of discharging holes so as to repair cracks on the outer sheath.
(8) Guide fibers penetrating through the inside and the outside of the discharge hole are inserted into the discharge hole, a plurality of fluff are distributed on the guide fibers, the guide fibers have certain length and play a certain drainage role after the repair material seeps out, the elastic bag body is coated with a flexible magnetic absorption layer, the interior of the repair material is doped with magnetic particles, and the flexible magnetic absorption layer attached to the inner side of the elastic discharge bag plays a magnetic absorption drainage role on the repair material at the bottom of the repair material filling cavity.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a side cross-sectional view of the present invention;
FIG. 3 is a second elevational cross-sectional view of the present invention;
FIG. 4 is a front cross-sectional view of the inner sheath of the present invention at the junction with the outer sheath;
FIG. 5 is a cross-sectional view of the repair inlay being embedded between an inner sheath and an outer sheath in accordance with the present invention;
FIG. 6 is a perspective view of the present invention with the thermal expansion filling layer and the hydrolysis heat storage layer separated;
FIG. 7 is a cross-sectional view of the junction of the elastic discharging bag and the material guiding rod of the present invention.
The reference numbers in the figures illustrate:
1 inner sheath, 101 mending material filling cavity, 2 outer sheath, 3 mending embedded body, 4 mending material, 5 closed diaphragm, 6 elastic discharging bag, 601 elastic bag body, 602 discharging hole, 603 guiding fiber, 604 flexible magnetic absorbing layer, 7 guiding rod, 8 thermal expansion filling layer, 9 hydrolysis heat storage layer, 901 flexible interlayer and 902 water-soluble heat release bag.
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," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "fitted/connected", "connected", and the like, are to be interpreted broadly, such as "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 1:
referring to fig. 1-5, an anti-seepage self-healing underground embedded cable sheath comprises an inner sheath 1 covering the outer side of a cable insulation layer, an outer sheath 2 covering the outer side of the inner sheath 1, the inner sheath 1 and the outer sheath 2 both adopt rubber sheaths, a plurality of repairing material filling cavities 101 are formed in the end surface of the outer side wall of the inner sheath 1, the plurality of repairing material filling cavities 101 are of an oval structure with a narrow inner part and a wide outer part, the plurality of repairing material filling cavities 101 are arranged adjacently in a closed manner, repairing embedded bodies 3 are filled in the plurality of repairing material filling cavities 101, the outer end walls of the repairing embedded bodies 3 are in sealing connection with the inner end wall of the outer sheath 2, each repairing embedded body 3 comprises a repairing material 4 filled in the repairing material filling cavity 101, a closed diaphragm 5 for sealing the repairing material 4 is arranged in the repairing material filling cavity 101, and a thermal expansion filling layer 8 is arranged in the repairing material filling cavity 101 at the upper end of the closed diaphragm 5, the thermal expansion filling layer 8 is internally embedded with a plurality of elastic discharging bags 6, the bottom ends of the elastic discharging bags 6 are communicated with the interior of the repairing material 4 through the flexible material guiding rod 7, the repairing material 4 can be guided into the elastic discharging bags 6 through the flexible material guiding rod 7 and seeps out of the crack of the outer sheath 2 through the elastic discharging bags 6 to be repaired, specifically, the repairing material 4 is formed by mixing and proportioning flame-retardant polyurethane insulating resin, rubber binder and water, the mass ratio of the flame-retardant polyurethane insulating resin to the rubber binder to the water is 2:1:1, the flame-retardant polyurethane insulating resin has the characteristics of fast curing, low curing stress, good sealing performance, impact resistance, good water resistance, convenience in construction and the like, and the repaired sealing position is not influenced by water, oil, salt and other pollutants.
Referring to fig. 5-6, the upper end surface of the thermal expansion filling layer 8 is covered with a hydrolysis heat storage layer 9 which is hermetically connected with the inner wall of the outer sheath 2, the hydrolysis heat storage layer 9 comprises a flexible interlayer 901 covering the outer end wall of the thermal expansion filling layer 8, a plurality of water-soluble heat-releasing bags 902 are embedded in the flexible interlayer 901, reducing iron powder is filled in the water-soluble heat-releasing bags 902, a plurality of infiltration holes are formed in the flexible interlayer 901, the water-soluble heat-releasing bags 902 are embedded and bonded in the infiltration holes, after the water-soluble heat-releasing bags 902 are dissolved in water, the infiltration holes are exposed so as to facilitate outward seepage of the repair material 4 guided from the bottom of the repair material filling cavity 101 through the infiltration holes to repair cracks, a plurality of water-soluble heat-releasing bags 902 are provided so as to facilitate relatively targeted repair of the crack damages at different positions of the outer sheath 2, the water-soluble heat-releasing bags 902 are hollow hydrolysis bag skins filled in the infiltration holes, the water-soluble material of water-soluble material is adopted to the capsule shell of hydrolysising, behind the outer water vapour of external passing through crackle infiltration oversheath 2 inboard, hydrolysise the capsule shell of hydrolysising, thereby naked exposure reducing iron powder, reducing iron powder meets the air and generates heat, with this thermal expansion of realization thermal expansion filling layer 8, extrude to inlaying its inside elasticity ejection of compact bag 6 behind the thermal expansion filling layer 8 thermal expansion, with extrude the inside repair material 4 of elasticity ejection of compact bag 6, repair material 4 repairs back to crackle department, prevent that steam from continuing the infiltration, thereby the water-soluble heat release bag 902 of other department then can not continuously be hydrolysised.
Referring to fig. 6-7, the thermal expansion filling layer 8 is made of a thermal expansion material, the thermal expansion filling layer 8 is provided with a plurality of thermal expansion holes for embedding the elastic discharging bag 6, the top ends of the thermal expansion filling layers 8 are abutted against the bottom end of the flexible interlayer 901, the elastic discharging bag 6 comprises an elastic bag body 601 arranged in the thermal expansion holes, the elastic bag body 601 is made of a high-elasticity material, the top end wall of the elastic bag body 601 is provided with a plurality of discharging holes 602, when the elastic discharging bag 6 is extruded, the elastic discharging bag 6 inside the elastic discharging bag 6 seeps through the plurality of discharging holes 602, so as to repair cracks at the outer sheath 2, the discharging holes 602 are inserted with guide fibers 603 penetrating through the inside and outside of the discharging holes 602, a plurality of fluffs are distributed on the guide fibers 603, the guide fibers 603 have a certain length, and play a certain role in drainage after the repairing material 4 seeps, which needs to be supplemented, the elastic discharging bag 6 is made of heat-resistant elastic material, and the discharging hole 602 is in a closed state when no external pressure acts.
In addition, it should be emphasized that the elastic bag body 601 is coated with the flexible magnetic absorption layer 604, the mending material 4 is doped with magnetic particles, the flexible material guiding rod 7 is internally penetrated with a guiding fiber filament, two ends of the guiding fiber filament respectively extend into the mending material 4 and the elastic material discharging bag 6, and the flexible magnetic absorption layer 604 plays a role in magnetic absorption and drainage of the mending material 4 at the bottom in the mending material filling cavity 101, so that a certain amount of mending material 4 is always stored in the elastic material discharging bag 6, and more mending materials 4 are provided.
A use method of an anti-seepage self-healing underground embedded cable sheath comprises the following steps:
s1, when the outer sheath 2 is broken due to cracks at a certain position, the underground water-containing air and underground water are immersed into the outer sheath 2 through the cracks, the water-soluble heat-release bag 902 on the hydrolysis heat-storage layer 9 between the outer sheath 2 and the inner sheath 1 is dissolved in water to expose the reducing iron powder inside, and the material-permeating holes at the exposed position;
s2, generating heat when the reducing iron powder meets air, and performing thermal expansion reaction when the thermal expansion filling layer 8 meets heat, so that the elastic discharging bag 6 embedded in the elastic discharging bag 6 is subjected to thermal expansion extrusion, the repairing material 4 in the elastic discharging bag 6 after being extruded seeps out through the discharging hole 602, and the cracks are repaired through the disintegrated seeping hole;
s3, the flexible magnetic absorption layer 604 attached to the inner side of the elastic discharging bag 6 plays a role in guiding the repair material 4 at the bottom in the repair material filling cavity 101, so that a certain amount of repair material 4 is stored in the elastic discharging bag 6 all the time, and more repair materials 4 are provided.
This scheme is through setting up inner sheath 1 and the oversheath 2 that the overcoat was established, inlay on inner sheath 1 and establish a plurality of repairs of installing and inlay body 3, when oversheath 2 outer end wall produced the crackle, in the external steam infiltration oversheath 2, repair inlays water-soluble heat release bag 902 on establishing body 3 and dissolves naked its inside reducing iron powder of exposing with water, reducing iron powder meets air release heat, with this heat transfer to thermal expansion filling layer 8 department, thermal expansion filling layer 8 is heated the thermal expansion and is being inlayed and locate its inside elasticity ejection of compact bag 6 and extrude, with this realization with inside repair material 4 of elasticity ejection of compact bag 6 outwards derive, the repair material 4 of deriving sees through the crack of hydrolysis heat accumulation layer 9 to outer sheath 2 departments and fills the completion to damaged part's self-repairing.
The components used in the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.
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 (4)
1. The utility model provides an underground pre-buried cable sheath of prevention of seepage self-healing type, locates inner sheath (1) in the cable insulation outside including the cover, the outside cladding of inner sheath (1) has oversheath (2), its characterized in that: a plurality of repairing material filling cavities (101) are formed in the end face of the outer side wall of the inner sheath (1), repairing embedded bodies (3) are filled in the repairing material filling cavities (101), and the outer end walls of the repairing embedded bodies (3) are in sealing connection with the inner end wall of the outer sheath (2);
the repairing embedded body (3) comprises a repairing material (4) filled in a repairing material filling cavity (101), a closed diaphragm (5) used for sealing the repairing material (4) is arranged in the repairing material filling cavity (101), a thermal expansion filling layer (8) is arranged in the repairing material filling cavity (101) and positioned at the upper end of the closed diaphragm (5), a plurality of elastic discharging bags (6) are embedded in the thermal expansion filling layer (8), the bottom ends of the elastic discharging bags (6) are communicated with the interior of the repairing material (4) through flexible material guide rods (7), a hydrolysis heat storage layer (9) hermetically connected with the inner wall of the thermal expansion filling layer (2) covers the upper end surface of the thermal expansion filling layer (8), the hydrolysis heat storage layer (9) comprises a flexible interlayer (901) coated on the outer end wall of the thermal expansion filling layer (8), and a plurality of water-soluble heat release bags (902) are embedded in the flexible interlayer (901), the inside of the water-soluble heat-release capsule (902) is filled with reducing iron powder;
the flexible interlayer (901) is provided with a plurality of material seepage holes, the water-soluble heat-release bag (902) is embedded in the material seepage holes and is adhered to the material seepage holes, the water-soluble heat-release bag (902) is a hollow hydrolysis bag skin filled in the material seepage holes, the hydrolysis bag skin is made of water-soluble materials, the thermal expansion filling layer (8) is made of thermal expansion materials, the thermal expansion filling layer (8) is provided with a plurality of thermal expansion holes for filling and embedding the elastic discharge bag (6), the top ends of the thermal expansion filling layer (8) are abutted against the bottom end of the flexible interlayer (901), the elastic discharge bag (6) comprises an elastic bag body (601) arranged in the thermal expansion holes, the elastic bag body (601) is made of high-elasticity materials, the top end wall of the elastic bag body (601) is provided with a plurality of discharge holes (602), and guide fibers (603) penetrating through the inside and outside of the discharge holes (602) are inserted in the discharge holes (602), a plurality of fluffs are distributed on the material guiding fiber (603), a flexible magnetic absorption layer (604) is coated inside the elastic bag body (601), and magnetic particles are doped inside the patching material (4).
2. The anti-seepage self-healing underground embedded cable sheath according to claim 1, characterized in that: the plurality of repair material filling cavities (101) are of oval structures with narrow inner parts and wide outer parts, and the tails of the plurality of repair material filling cavities (101) are arranged adjacently.
3. The anti-seepage self-healing underground embedded cable sheath according to claim 1, characterized in that: the repairing material (4) is formed by mixing and proportioning flame-retardant polyurethane insulating resin, a rubber binder and water, wherein the mass ratio of the flame-retardant polyurethane insulating resin to the rubber binder to the water is 2:1: 1.
4. The use method of the anti-seepage self-healing underground embedded cable sheath according to claim 1, characterized in that: the method comprises the following steps:
s1, when the outer sheath (2) is cracked and damaged, the underground water-containing air and the underground water are immersed into the outer sheath (2) through the cracks, the water-soluble heat-release bag (902) on the hydrolysis heat-storage layer (9) between the outer sheath (2) and the inner sheath (1) is dissolved in water to expose the reducing iron powder inside the water-soluble heat-release bag, and the material seepage holes are formed in the exposed part;
s2, generating heat when the reducing iron powder meets air, and performing thermal expansion reaction when the thermal expansion filling layer (8) meets heat, so that the elastic discharge bag (6) embedded in the elastic discharge bag is subjected to thermal expansion extrusion, the repair material (4) in the elastic discharge bag (6) after being extruded seeps out through the discharge hole (602), and the cracks are repaired through the disintegrated seepage hole;
s3, the flexible magnetic absorption layer (604) attached to the inner side of the elastic discharging bag (6) plays a role in guiding the repair material (4) at the bottom in the repair material filling cavity (101), and a certain amount of repair material (4) is stored in the elastic discharging bag (6) all the time to provide more repair materials (4).
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| CN202011412983.1A CN112582102B (en) | 2020-12-07 | 2020-12-07 | Seepage-proofing self-healing underground embedded cable sheath |
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| CN202011412983.1A CN112582102B (en) | 2020-12-07 | 2020-12-07 | Seepage-proofing self-healing underground embedded cable sheath |
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| CN112582102B true CN112582102B (en) | 2022-08-12 |
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|---|---|---|---|---|
| CN113393967B (en) * | 2021-05-17 | 2022-09-13 | 东莞市大旺光电有限公司 | Liquid exchange type high-safety power line |
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