CN118197702B - Water-blocking flame-retardant energy storage cable - Google Patents
Water-blocking flame-retardant energy storage cable Download PDFInfo
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- CN118197702B CN118197702B CN202410607749.6A CN202410607749A CN118197702B CN 118197702 B CN118197702 B CN 118197702B CN 202410607749 A CN202410607749 A CN 202410607749A CN 118197702 B CN118197702 B CN 118197702B
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Classifications
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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
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/428—Heat conduction
-
- 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
- H01B7/02—Disposition of insulation
-
- 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
-
- 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
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
-
- 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
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Insulated Conductors (AREA)
Abstract
The invention relates to the technical field of power transmission cables, in particular to a water-blocking flame-retardant energy storage cable which comprises an insulating cable core, a water-blocking heat-conducting layer, a flame-retardant buffer layer and a sheath layer which are sequentially arranged from inside to outside; the insulated cable core comprises a central conductor formed by twisting a plurality of metal conductors, and an insulating layer and a fireproof isolation layer which are arranged outside the central conductor; the water-blocking heat-conducting layer comprises a plurality of hollow heat-conducting pipes arranged along the length direction of the insulating cable core, a water-blocking filler arranged among the plurality of heat-conducting pipes, a water-blocking wrapping tape arranged outside the water-blocking filler and the heat-conducting pipes, and an opening arranged at one side of the heat-conducting pipes, which is attached to the insulating cable core; and a plurality of heat conduction holes penetrating through the side wall of the heat conduction pipe far away from the insulating cable core are sequentially formed in the length direction of the heat conduction pipe, and the heat conduction holes are attached to the water-blocking wrapping tape. When the cable is used, heat at the cable connecting end is quickly diffused to the middle of the cable, so that the overall heating uniformity of the cable is improved, and the service life of the cable is prolonged.
Description
Technical Field
The invention relates to the technical field of power transmission cables, in particular to a water-blocking flame-retardant energy storage cable.
Background
The energy storage cable is commonly used in an energy storage system and generally refers to a cable between battery modules, between battery clusters, between a battery cluster and a combiner box or between a battery cluster and an energy storage converter on a direct current side in a battery energy storage system. The rated voltage of the cable is at most DC1500V, and the highest temperature resistance grade is 125 ℃. The energy storage cable has various use environments, wherein, in the use process, a part of products contain water in the environment, including rainwater, air water and the like, and the service life and the normal use condition of the cable can be influenced. On the basis, because the heat conductivity of the insulating part and the outer protection part of the energy storage cable is limited, the purpose of rapid heat dissipation cannot be achieved, the load of the cable is increased under the long-term working of the cable core, the temperature of the cable core is increased, the cable is heated and expanded, and spontaneous combustion of the cable is easily caused when the cable is used for a long time, so that the cable for the energy storage battery not only has excellent insulating electrical property and mechanical property, but also has the characteristics of battery acid resistance, aging resistance, sunlight resistance, low smoke, zero halogen flame retardance, environmental protection and the like.
CN213277489U discloses a battery cable for a high-flexibility environment-friendly energy storage system, which adopts a multi-strand stranded tinned copper core flexible conductor, a modified TPU insulating material and an environment-friendly flame-retardant PUR sheath, and has the advantages of high flexibility, excellent electrical performance, acid and alkali resistance, salt spray resistance, ultraviolet light resistance, long-term severe use characteristics, low smoke, no halogen, flame retardance and the like. Although the cable has better environmental protection, the cable has relatively poor moisture resistance, heat resistance and flame retardance and needs to be further reinforced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the water-blocking flame-retardant energy storage cable is provided for solving the problems that the existing energy storage cable is deficient in water blocking and flame retarding performance and needs to be further reinforced.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A water-blocking flame-retardant energy storage cable comprises an insulating cable core, a water-blocking heat conduction layer, a flame-retardant buffer layer and a sheath layer which are sequentially arranged from inside to outside;
The insulated cable core comprises a central conductor formed by twisting a plurality of metal conductors, and an insulating layer and a fireproof isolation layer which are arranged outside the central conductor;
The water-blocking heat-conducting layer comprises a plurality of hollow heat-conducting pipes arranged along the length direction of the insulating cable core, a water-blocking filler arranged among the plurality of heat-conducting pipes, a water-blocking wrapping tape arranged outside the water-blocking filler and the heat-conducting pipes, and an opening arranged at one side of the heat-conducting pipes, which is attached to the insulating cable core; and a plurality of heat conduction holes penetrating through the side wall of the heat conduction pipe far away from the insulating cable core are sequentially formed in the length direction of the heat conduction pipe, and the heat conduction holes are attached to the water-blocking wrapping tape.
Further, the metal conductor is a 6 th copper conductor or a tin-copper conductor, the central conductor is twisted into a round section in a 1+6+12 normal mode, the softness of the cable is guaranteed, the monofilament diameter of the metal conductor is 0.1+/-0.02 mm, the insulating layer is formed by extruding irradiation crosslinked polyethylene outside the central conductor, and the fireproof isolation layer is a ceramic silicon rubber composite belt. Under the combustion condition, the ceramic can be quickly formed at 350 ℃ to play roles of heat insulation, fire prevention and fire resistance,
Further, the heat-conducting pipe is a hollow structure made of halogen-free crosslinked flame-retardant materials through extrusion, in the use process of the cable, the temperature difference from two ends to the middle of a cable interface is reduced through gas circulation, the use safety of the cable is improved, and the heat-conducting pipe is arranged at the center of the outer side of the insulating cable core in a symmetrical mode and is stranded with the insulating cable core. When the outside is damaged, the water blocking filler acts on the heat conduction pipe, occupies gaps between the heat conduction pipe and the insulating cable core through expansion extrusion, improves the water blocking effect of the insulating cable core, and simultaneously, part of water absorbing fibers enter the inside of the heat conduction pipe due to stress, so that expansion and diffusion of the edge of the damaged position are avoided.
Further, the distance between two adjacent heat conducting holes is more than 50mm. Moisture is prevented from entering the cable from the heat conduction hole,
Further, the opening side of the heat conducting pipe is subjected to grinding treatment, and the included angle of the opening side of the heat conducting pipe is 30-90 degrees.
Further, the diameter of the heat conducting pipe is smaller than the radius of the cable core.
Further, the water-blocking filler is a polyester yarn with water-absorbing resin adhered to the outside; the water-blocking tape is a semiconductor water-blocking tape, the thickness of the water-blocking tape is 0.2mm, and the overlapping rate is 20%. The semiconductor water-blocking tape can shield electromagnetic fields formed when the conductor part is electrified so as to shield interference of external electromagnetic fields.
Further, the flame-retardant buffer layer comprises a cooling buffer layer and a flame-retardant layer, wherein the cooling buffer layer is prepared by coating heat conduction grease on the outer side of an insulating material, and the flame-retardant layer is prepared by spirally overlapping and winding two layers of low-smoke halogen-free flame-retardant tapes on the surface of the cooling buffer layer.
Further, the wrapping cover rate of the low-smoke halogen-free flame-retardant belt is not less than 30%.
Furthermore, the sheath layer is made of super-hydrophobic low-smoke halogen-free cross-linked polyolefin material, and the Shore A hardness of the material is 50-60.
The super-hydrophobic low-smoke halogen-free cross-linked polyolefin material is prepared by spraying a super-hydrophobic treatment agent on the surface of a sheath prepared by extrusion of the low-smoke halogen-free cross-linked polyolefin material; the super-hydrophobic treatment agent is treated by adopting two procedures of FluoroThane TS A and FluoroThane TS B purchased by Shanghai vone and Puo special oil products, and the treated sheath layer can maintain the super-hydrophobic characteristic in various climatic environments for many years through natural air drying of nano particles with the thickness of about 100 microns on the surface of the sheath.
The beneficial effects of the invention are as follows:
according to the invention, the hollow heat conducting pipe is arranged on the outer side of the insulating cable core, when the cable is used, the heat of the cable connecting end is quickly diffused to the middle part of the cable through the axial arrangement of the hollow heat conducting pipe, so that the overall heated uniformity of the cable is improved; meanwhile, extrusion of the expansion of the water-absorbent resin to the insulating cable core at the edge of the damaged position is avoided, the water-blocking wrapping tape is overlapped and wrapped on the outer layer of the water-blocking filler, the water-blocking filler can be assisted to block water transversely, meanwhile, the water-blocking filler is fixed, and the stability of the cable is improved.
According to the invention, the fire-resistant isolation layer and the fire-resistant layer are sequentially arranged from inside to outside, so that the fire-resistant performance of the cable is greatly improved, the waterproof performance of the cable is greatly improved by arranging the water-resistant heat-conducting layer and the super-hydrophobic outer sheath layer on the basis, the outer sheath layer firstly plays a good waterproof role, the fire-resistant buffer layer is also made of the radiation polyethylene material with the waterproof effect, the waterproof effect of the cable is effectively improved, and on the basis, even if moisture enters the cable inside under the condition that the outer sheath layer is not damaged, the water-absorbent resin which expands at a high speed in the cable expands can expand, so that the space of the heat-conducting pipe is extruded, the roundness of the cable is improved, the internal cracking caused by rapid expansion is avoided, and the whole service life and the application range can be further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic cross-sectional view of a water-blocking flame-retardant energy storage cable according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a water-blocking flame-retardant energy storage cable according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a heat pipe according to an embodiment of the present invention;
FIG. 4 is a schematic view illustrating another direction of a heat pipe according to an embodiment of the present invention;
Reference numerals: 10. an insulated cable core; 11. a center conductor; 12. an insulating layer; 13. a refractory barrier layer; 20. a water-blocking heat-conducting layer; 21. a heat conduction pipe; 22. a water-blocking filler; 23. a water-blocking belting; 24. a heat conduction hole; 30. a flame retardant buffer layer; 31. a cooling buffer layer; 32. a flame retardant layer; 40. and a sheath layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The water-blocking flame-retardant energy storage cable shown in fig. 1-4 comprises an insulating cable core 10, a water-blocking heat conduction layer 20, a flame-retardant buffer layer 30 and a sheath layer 40 which are sequentially arranged from inside to outside;
the insulated cable core 10 includes a center conductor 11 formed by twisting a plurality of metal conductors, and an insulating layer 12 and a fire-resistant insulation layer 13 provided outside the center conductor 11;
The water-blocking heat-conducting layer 20 comprises a plurality of hollow heat-conducting pipes 21 arranged along the length direction of the insulating cable core 10, water-blocking filler 22 arranged among the plurality of heat-conducting pipes 21, and a water-blocking wrapping tape 23 arranged outside the water-blocking filler 22 and the heat-conducting pipes 21, wherein one side of the heat-conducting pipes 21 attached to the insulating cable core 10 is provided with an opening; a plurality of heat conduction holes 24 penetrating through the side wall of the heat conduction pipe 21 far away from the insulating cable core 10 are sequentially arranged along the length direction of the heat conduction pipe 21, and the plurality of heat conduction holes 24 are attached to the water-blocking wrapping tape 23.
According to the invention, the hollow heat conducting pipe 21 is arranged on the outer side of the insulating cable core 10, when the cable is used, the heat at the connecting end of the cable is quickly diffused to the middle part of the cable through the axial arrangement of the hollow heat conducting pipe 21, so that the overall heated uniformity of the cable is improved, on the basis, the heat generated in the heat conducting pipe 21 is dispersed and diffused to the outer periphery of the water-blocking heat conducting layer 20 through the arrangement of the heat conducting holes 24, the inner temperature of the insulating cable core 10 is reduced, the service life of the cable is prolonged, when a fire disaster occurs outside, the flame-retardant buffer layer 30 and the sheath layer 40 of the cable are damaged, the water-absorbing resin which is expanded at high speed in the cable can be quickly expanded and filled up with the break, the radial binding force born by the heat conducting pipe 21 is reduced in the process, the joint part of the heat conducting pipe 21 and the insulating cable core 10 is outwards moved, and the water-blocking filler 22 extrudes the heat conducting pipe 21, so that the two end parts at the opening side of the heat conducting pipe 21 are mutually close to the periphery of the insulating cable core 10, and simultaneously, the two sides of the heat conducting pipe 21 and the insulating core 10 are stranded, and the two sides at the edge of the broken position are not uniformly filled with the heat conducting pipe 21 are filled with the water, and the inner side of the heat conducting pipe 21 is more effectively filled up with the water and the inside the insulating cable 10, and the leakage is prevented; meanwhile, extrusion of the water-absorbent resin to the insulating cable core 10 at the edge of the damaged position is avoided, the water-blocking tape 23 is overlapped and wrapped on the outer layer of the water-blocking filler 22, the water-blocking filler 22 can be assisted to block water transversely, meanwhile, the water-blocking filler 22 is fixed, and the stability of the cable is improved.
In this embodiment, in order to ensure the power-on capability of the energy storage cable, the metal conductor is a 6 th copper conductor or a tin-copper conductor, so that the conductor can be ensured not to be corroded in an acid-base environment, the current-carrying capability of the cable is improved, the central conductor 11 is twisted into a round section in a 1+6+12 normal mode, the softness of the cable is ensured, and the cable has excellent bending resistance. The diameter of the monofilament of the metal conductor is 0.1 plus or minus 0.02mm, the insulating layer 12 is prepared by extruding and packing irradiation crosslinked polyethylene on the outer side of the central conductor 11, so that the insulating material fills gaps generated by twisting the central conductor 11, normal conduction of the conductor is ensured, no leakage of electricity is avoided, and the fireproof isolation layer 13 is a ceramic silicon rubber composite belt. According to the invention, the insulating layer 12 in the insulating cable core 10 is arranged in the fire-resistant isolation layer 13, and under the combustion condition, the fire-resistant isolation layer 13 can be quickly porcelain at 350 ℃ to play a role in heat insulation, fire prevention and fire resistance, so that the normal operation of the protection conductor is ensured when a fire disaster occurs.
Specifically, the heat-conducting tube 21 is a hollow structure made of halogen-free cross-linked flame-retardant material through extrusion, and in the use process of the cable, the temperature difference from two ends to the middle of the cable interface is reduced through gas circulation, so that the use safety of the cable is improved, and the heat-conducting tube 21 is arranged at the center of the outer side of the insulating cable core 10 in a symmetrical manner and is stranded with the insulating cable core 10. When the outside is damaged, the water blocking filler 22 acts on the heat conducting pipe 21, occupies gaps between the heat conducting pipe 21 and the insulating cable core 10 through expansion extrusion, improves the water blocking effect of the insulating cable core 10, and simultaneously, due to stress, part of water absorbing fibers enter the inside of the heat conducting pipe 21, so that expansion and diffusion of the edge of the damaged position are avoided.
As shown in fig. 1 or 2, the distance between two adjacent heat conduction holes 24 is > 50mm. Moisture is prevented from entering the interior of the cable from the heat conducting holes 24, and specifically, the diameter of the heat conducting holes 24 is less than 1mm. The design of the heat conduction hole 24 in the invention is that the heat dissipation effect is improved by matching with the air circulation of a hollow structure in the length direction of the heat conduction pipe 21, the outside of the heat conduction hole 24 is wound by the water-blocking tape 23, so that when external materials enter the heat conduction pipe 21 through the heat conduction hole 24 and a certain place of a cable burns, the burning diffusion can be reduced to the greatest extent due to the arrangement of flame retardant materials, the heat conduction pipe 21 is made of halogen-free crosslinked flame retardant materials in an extrusion mode, the flame retardant effect of the cable can be improved, and even if the heat conduction pipe 21 leaks naked due to dislocation, the fire-resistant isolation layer 13 outside the insulating cable core 10 can also play a role in heat insulation and fire prevention, at the moment, the water-blocking filler 22 swells when meeting water, the damaged position can be filled quickly, the spread of fire is reduced, meanwhile, the water is prevented from entering the inside of the cable in a radial direction, and the use safety is improved. Because the diameter of the heat conducting holes 24 is smaller and the distance between the two heat conducting holes 24 is longer, the expansion of the water blocking filler 22 can be blocked quickly, and high-heat smoke dust is prevented from entering.
As shown in fig. 3 or 4, the open side of the heat pipe 21 is subjected to a flattening treatment, and the included angle of the open side of the heat pipe 21 is 30 ° to 90 °. The included angle is controlled to be 90 degrees at maximum, and when the heat conduction pipe 21 is initially hinged, the heat conduction cut-off state caused by collapse of the opening side is avoided, and meanwhile the situation that the water-blocking heat conduction layer 20 is difficult to form a regular circular structure is avoided. The included angle is too small, the contact area between the flow channel and the insulating cable core 10 is too small, the heat dissipation effect is poor, and the diameter of the heat conduction pipe 21 is smaller than the radius of the cable core. The diameter of the cable core is preferably 1/3-2/5 of the diameter of the cable core, so that a higher heat dissipation effect can be ensured, and the overlarge diameter of the cable is avoided.
Preferably, the water blocking filler 22 is a polyester yarn to which a water absorbing resin is externally adhered; the water-blocking tape 23 is a semiconductor water-blocking tape, the thickness of the water-blocking tape 23 is 0.2mm, and the overlapping rate is 20%. The semiconductor water-blocking tape can shield electromagnetic fields formed when the conductor part is electrified so as to shield interference of external electromagnetic fields. In this embodiment, the water blocking filler 22 is a water blocking rope parallel to the heat conducting tube 21, and the water blocking rope and the water conducting tube are twisted with the insulating cable core 10 at the same time, and it should be noted that the water blocking filler 22 may also be filled in the gap after the heat conducting tube 21 and the insulating cable core 10 are twisted, and a person skilled in the art may adjust according to the actual situation, and the specific water blocking filler 22 is incompletely filled in the gap, so that a space expanded after the water absorbing resin absorbs water is reserved.
As shown in fig. 2, the flame retardant buffer layer 30 includes a cooling buffer layer 31 and a flame retardant layer 32, wherein the cooling buffer layer 31 is made by coating heat conduction grease on the outer side of an insulating material, specifically, the heat conduction grease is coated on the outer side of the radiation crosslinked polyethylene after the radiation crosslinked polyethylene is extruded on the outer side of the water-blocking tape 23; the transient temperature rise of the cable is effectively reduced, and local overheating is avoided. The flame-retardant layer 32 is made by spirally overlapping and winding two layers of low-smoke halogen-free flame-retardant tapes on the surface of the cooling buffer layer 31. The wrapping cover rate of the low-smoke halogen-free flame-retardant belt is not less than 30%.
In this embodiment, as the outer sheath of the energy storage cable, the sheath layer 40 is made of a super-hydrophobic low-smoke halogen-free cross-linked polyolefin material, and the shore a hardness of the material is 50-60. It is possible to ensure that the flame retardant cushioning layer 30 is not damaged by external factors. The low-smoke halogen-free cross-linked polyolefin material has excellent high temperature resistance, oil resistance and acid and alkali resistance.
The super-hydrophobic low-smoke halogen-free cross-linked polyolefin material is prepared by spraying a super-hydrophobic treatment agent on the surface of a sheath prepared by extrusion of the low-smoke halogen-free cross-linked polyolefin material; the super-hydrophobic treatment agent is treated by adopting two procedures of FluoroThane TS A and FluoroThane TS B, and nanoparticles with the thickness of about 100 micrometers are arranged on the surface of the sheath through natural air drying. The treated surface appearance was frosted due to the nanoparticles on the surface. The treated substrate can maintain the super-hydrophobic property in various climatic environments for many years.
And during specific spraying operation, placing the sheath material in a normal temperature environment, cleaning and drying the sheath material.
The FluoroThane TS A vials were then removed and shaken vigorously for more than 1 minute until there was no delamination or no white precipitate at the bottom.
In the spraying process, the nozzle is kept to be vertical to 20-25 cm away from the surface of the sheath material, the spray gun is uniformly moved, and the speed is kept to be 15-25 cm/s. And performing half-overlapping spraying at intervals of 7.5-10 cm. After spraying, drying for more than 10 minutes.
Then carrying out FluoroThane TS B spraying, wherein FluoroThane TS B is solid powder, adding acetone according to the mass ratio, mixing and shaking uniformly, keeping the nozzle at a vertical distance of 20-25 cm from the surface of the sheath material, and uniformly moving the spray gun at a speed of 15-25 cm/s. And performing half overlapping spraying at intervals of 7.5-10 cm, and drying the surface of the treated sheath material for 5 days for use.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The water-blocking flame-retardant energy storage cable is characterized by comprising an insulating cable core, a water-blocking heat-conducting layer, a flame-retardant buffer layer and a sheath layer which are sequentially arranged from inside to outside;
the insulated cable core comprises a central conductor formed by twisting a plurality of metal conductors, and an insulating layer and a fireproof isolation layer which are arranged outside the central conductor;
the water-blocking heat-conducting layer comprises a plurality of hollow heat-conducting pipes arranged along the length direction of the insulating cable core, water-blocking filler arranged among the plurality of heat-conducting pipes, and water-blocking wrapping tape arranged on the outer sides of the water-blocking filler and the heat-conducting pipes, wherein one side of the heat-conducting pipes, which is attached to the insulating cable core, is provided with an opening; a plurality of penetrating heat conduction holes are sequentially formed in the side wall, far away from the insulating cable core, of the heat conduction pipe along the length direction of the heat conduction pipe, and the plurality of heat conduction holes are attached to the water-blocking wrapping tape; the heat conducting pipe is of a hollow structure made of halogen-free crosslinked flame-retardant materials through extrusion, is arranged at the center of the outer side of the insulating cable core in a symmetrical mode and is stranded with the insulating cable core;
the distance between two adjacent heat conducting holes is more than 50mm;
The open side of the heat conduction pipe is subjected to grinding treatment, and the included angle of the open side of the heat conduction pipe is 30-90 degrees.
2. The water-blocking flame-retardant energy storage cable according to claim 1, wherein the metal conductor is a 6 th copper conductor or a tin-copper conductor, the insulating layer is prepared by extruding and packaging irradiation crosslinked polyethylene on the outer side of the central conductor, and the fireproof isolation layer is a ceramic silicon rubber composite belt.
3. A water-blocking flame-retardant energy storage cable according to claim 1, wherein the diameter of the heat conducting tube is smaller than the radius of the cable core.
4. A water-blocking flame-retardant energy storage cable according to any one of claims 1 to 3, wherein the water-blocking filler is a polyester yarn externally adhered with a water-absorbing resin; the water-blocking tape is a semiconductor water-blocking tape, the thickness of the water-blocking tape is 0.2mm, and the overlapping rate is 20%.
5. A water-blocking flame-retardant energy storage cable according to any one of claims 1-3, wherein the flame-retardant buffer layer comprises a cooling buffer layer and a flame-retardant layer, the cooling buffer layer is prepared by coating heat conduction grease on the outer side of an insulating material, and the flame-retardant layer is prepared by spirally overlapping and winding two layers of low-smoke halogen-free flame-retardant tapes on the surface of the cooling buffer layer.
6. The water-blocking flame-retardant energy storage cable of claim 5, wherein the wrapping lap rate of the low-smoke halogen-free flame-retardant tape is not less than 30%.
7. A water-blocking flame-retardant energy storage cable according to any one of claims 1-3, wherein the sheath layer is made of super-hydrophobic low-smoke halogen-free cross-linked polyolefin material, and the shore a hardness of the material is 50-60.
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| CN211479736U (en) * | 2019-06-19 | 2020-09-11 | 沈阳电力线缆有限公司 | High fire-resistant cable |
| CN217902793U (en) * | 2022-06-20 | 2022-11-25 | 安徽深联通讯有限公司 | Fireproof water-blocking temperature-reducing photoelectric composite cable |
| CN115020015A (en) * | 2022-06-29 | 2022-09-06 | 付难辉 | Resistance to compression flame retarded cable |
| CN117198625A (en) * | 2023-07-27 | 2023-12-08 | 山东日辉电缆集团有限公司 | Photoelectric hybrid cable and preparation process thereof |
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