CN210182098U - Cable for building - Google Patents
Cable for building Download PDFInfo
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- CN210182098U CN210182098U CN201920744075.9U CN201920744075U CN210182098U CN 210182098 U CN210182098 U CN 210182098U CN 201920744075 U CN201920744075 U CN 201920744075U CN 210182098 U CN210182098 U CN 210182098U
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Abstract
The application discloses a cable for buildings, which comprises a copper conductor, a synthetic mica tape fire-resistant insulating layer, an ultraviolet cross-linked polyethylene insulating layer, a low-smoke halogen-free flame-retardant inner sheath, a steel tape armor layer and a low-smoke halogen-free flame-retardant outer sheath which are sequentially arranged from inside to outside; through structural optimization of the arrangement sequence of the functional layers in the cable, material optimization of the functional layers and optimization of the production process, the electrical insulation performance, the flame retardant performance and the fire resistance of the building cable are improved obviously by means of the combination of multiple optimization, and the service life of the building cable is prolonged, the service life of the building cable can be as long as 70 years basically, the use and maintenance cost of the building is reduced, and the use potential safety hazard of the building is reduced.
Description
Technical Field
The utility model belongs to the technical field of the cable technique and specifically relates to a cable for building is related to.
Background
At present, most cables for buildings are single-layer insulation, crosslinked polyethylene insulation or polyvinyl chloride insulation is used, the electrical performance is poor in stability, poor in anti-interference capability, inflammable, easy to age, easy to abrade and scratch, and afraid of moisture, dense smoke and severe toxicity are generated during combustion, potential safety hazards exist, particularly, the service life is short, the service life of the cables can not reach the same life as that of the buildings, secondary wiring replacement cost is high, and the potential safety hazards are left for the buildings.
How to improve the service performance of the cable for the building, including the electrical insulation performance, the flame retardant performance and the fire resistance performance of the cable for the building, and further realize the improvement of the service life of the cable for the building, and strive for the service life equivalent to that of the building, so as to reduce the use and maintenance cost of the building and reduce the use potential safety hazard of the building, is a technical problem which needs to be solved urgently in the field.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cable for building.
For solving the above technical problem, the utility model provides a technical scheme does:
a cable for buildings comprises a copper conductor, a synthetic mica tape fire-resistant insulating layer, an ultraviolet cross-linked polyethylene insulating layer, a low-smoke halogen-free flame-retardant inner sheath, a steel tape armor layer and a low-smoke halogen-free flame-retardant outer sheath;
the copper conductor, the synthetic mica tape fire-resistant insulating layer, the ultraviolet crosslinking polyethylene insulating layer, the low-smoke halogen-free flame-retardant inner sheath, the steel tape armor layer and the low-smoke halogen-free flame-retardant outer sheath are sequentially arranged in the cable from inside to outside;
synthetic mica tape fire-resistant insulation layer is wrapping the cladding copper conductor, the crowded cladding of ultraviolet ray crosslinked polyethylene insulating layer is synthetic mica tape fire-resistant insulation layer, the crowded cladding of low smoke and zero halogen fire-retardant inner sheath is wrapping the ultraviolet ray crosslinked polyethylene insulating layer, the steel band armor is wrapping the cladding the fire-retardant inner sheath of low smoke and zero halogen, the crowded cladding of low smoke and zero halogen fire-retardant outer sheath is steel band armor.
Preferably, the copper conductor is a tin-plated copper conductor.
Preferably, when cable for building includes two at least cable cores, it has fire-retardant type filler to fill in the clearance between two at least cable cores, and two at least cable cores are wrapped the package ligature by fire-retardant type band, fire-retardant type band is wrapping the cladding ultraviolet ray crosslinked polyethylene insulating layer, the crowded cladding of fire-retardant inner sheath of low smoke and zero halogen is fire-retardant type band.
Preferably, the inner surface of the steel belt in the steel belt armor layer is plated with a plurality of strip-shaped mirror silver films which are arranged at intervals, and the length direction of each mirror silver film is parallel to the length direction of the steel belt.
Preferably, a glass fiber three-dimensional ribbon fabric with a three-dimensional grid is embedded in the ultraviolet cross-linked polyethylene insulating layer;
the glass fiber three-dimensional band-shaped fabric is wrapped on the outer surface of the synthetic mica tape fire-resistant insulating layer in advance before the ultraviolet cross-linked polyethylene insulating layer is extruded and formed, the ultraviolet cross-linked polyethylene insulating layer completely wraps the glass fiber three-dimensional band-shaped fabric, ultraviolet cross-linked polyethylene insulating materials are filled in three-dimensional grids of the glass fiber three-dimensional band-shaped fabric, and the glass fiber three-dimensional band-shaped fabric is in hot melting connection with the ultraviolet cross-linked polyethylene insulating layer in the extrusion and forming process.
The application has the following beneficial technical effects:
in the application, the copper conductor is a tinned copper conductor, so that the corrosion resistance and the oxidation resistance of the copper conductor are enhanced, and the cable is ensured to have good conductivity;
the fire resistance and the insulativity of the cable are enhanced by adopting the synthetic mica tape fire-resistant insulating layer;
the ultraviolet crosslinked polyethylene insulating layer is adopted, so that the excellent mechanical property, environmental stress cracking resistance, corrosion resistance, creep resistance, electrical property and heat resistance of the ultraviolet crosslinked polyethylene are fully utilized;
the low-smoke halogen-free flame-retardant inner sheath is formed by extruding and wrapping high-flame-retardant low-smoke halogen-free polyethylene sheath materials, and the inner sheath materials can meet the requirement of the cable for the building on the flame retardant property and also can meet the requirement of the cable for the building on the mechanical strength of the inner sheath;
the steel tape armor layer can enhance the mechanical strength of the cable and can prolong the service life of the cable;
the low-smoke halogen-free flame-retardant outer sheath is formed by extruding and wrapping low-smoke halogen-free flame-retardant cross-linked polyethylene sheath materials, meets the requirements of conventional mechanical properties and physical properties, and also meets the properties of no halogen, low smoke, low toxicity, flame retardance, corrosion resistance, slurry resistance, oil resistance and the like;
this application is through adopting fire-retardant type filler to fill, fire-retardant type band to carry out around the fire-retardant nature of package ligature, fire-retardant type inner sheath and fire-retardant type oversheath mutually combine in order to improve the fire resistance of cable.
In summary, the application discloses a cable for buildings, which comprises a copper conductor, a synthetic mica tape fire-resistant insulating layer, an ultraviolet cross-linked polyethylene insulating layer, a low-smoke halogen-free flame-retardant inner sheath, a steel tape armor layer and a low-smoke halogen-free flame-retardant outer sheath which are sequentially arranged from inside to outside; through structural optimization of the arrangement sequence of the functional layers in the cable, material optimization of the functional layers and optimization of the production process, the electrical insulation performance, the flame retardant performance and the fire resistance of the building cable are improved obviously by means of the combination of multiple optimization, and the service life of the building cable is prolonged, the service life of the building cable can be as long as 70 years basically, the use and maintenance cost of the building is reduced, and the use potential safety hazard of the building is reduced.
Drawings
Fig. 1 is a schematic cross-sectional view of a cable for building according to an embodiment of the present invention.
In the figure: 1 copper conductor, 2 synthetic mica tape fire-resistant insulation layers, 3 ultraviolet crosslinking polyethylene insulation layers, 4 low-smoke halogen-free flame-retardant inner sheaths, 5 steel tape armoring layers and 6 low-smoke halogen-free flame-retardant outer sheaths.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "axial", "radial", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientation or positional relationship indicated in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.
Referring to fig. 1, fig. 1 is a schematic cross-sectional structural diagram of a cable for building according to an embodiment of the present invention.
Embodiment 1, a cable for building, including a copper conductor 1, a synthetic mica tape fire-resistant insulating layer 2, an ultraviolet cross-linked polyethylene insulating layer 3, a low-smoke halogen-free flame-retardant inner sheath 4, a steel tape armor layer 5, and a low-smoke halogen-free flame-retardant outer sheath 6;
the copper conductor 1, the synthetic mica tape fire-resistant insulating layer 2, the ultraviolet cross-linked polyethylene insulating layer 3, the low-smoke halogen-free flame-retardant inner sheath 4, the steel tape armor layer 5 and the low-smoke halogen-free flame-retardant outer sheath 6 are sequentially arranged in the cable from inside to outside;
synthetic mica tape fire-resistant insulation layer 2 is wrapping cladding copper conductor 1, 3 crowded package claddings of ultraviolet crosslinking polyethylene insulating layer synthetic mica tape fire- resistant insulation layer 2, 4 crowded package claddings of low smoke and zero halogen fire-retardant inner sheath are ultraviolet crosslinking polyethylene insulating layer 3, steel band armor 5 is wrapping cladding low smoke and zero halogen fire-retardant inner sheath 4, 6 crowded package claddings of low smoke and zero halogen fire-retardant oversheath are steel band armor 5.
In example 2, the copper conductor 1 is a tin-plated copper conductor 1.
In embodiment 3, when the cable for a building includes at least two cable cores, a gap between the at least two cable cores is filled with a flame-retardant filler, and the at least two cable cores are wrapped and bound by a flame-retardant wrapping tape, the flame-retardant wrapping tape is wrapped and wrapped with the ultraviolet crosslinked polyethylene insulating layer 3, and the low-smoke halogen-free flame-retardant inner sheath 4 is wrapped and wrapped with the flame-retardant wrapping tape in an extruded manner;
the cable core is composed of a copper conductor 1, a synthetic mica tape fire-resistant insulating layer 2 and an ultraviolet crosslinking polyethylene insulating layer 3, and the cable core is obtained after the synthetic mica tape fire-resistant insulating layer 2 and the ultraviolet crosslinking polyethylene insulating layer 3 are sequentially coated on the copper conductor 1;
the flame-retardant filler is preferably a flame-retardant glass fiber filling rope; the flame-retardant wrapping tape is preferably a high-stop tape.
In embodiment 4, the inner surface of the steel strip in the steel strip armor layer 5 is plated with a plurality of mirror silver films arranged at intervals in a stripe shape, and the length direction of each mirror silver film is parallel to the length direction of the steel strip;
in the application, heat generated by electrifying the copper conductor 1 is mainly transferred by heat conduction and heat radiation, the heat of the heat radiation accounts for about 50% of the total heat generated by electrifying the copper conductor 1, the heat accounts for a large proportion, if no measures are taken, a large proportion of heat can be transferred to the atmospheric environment outside the cable in a heat radiation mode, the cable cannot be subjected to heat preservation and anti-freezing, and the heat which is difficult to obtain can be easily wasted; furthermore, the mirror silver film is positioned in the low-smoke halogen-free flame-retardant outer sheath 6, if the mirror silver film on the steel strip reflects most of the heat back, the low-smoke halogen-free flame-retardant outer sheath 6 cannot be effectively heated and frozen, so that the heat and cold in the cable can be caused, and the cable still cannot bear severe cold, therefore, the mirror silver films are arranged into a plurality of strips at intervals, the original steel strip surface without a coating is arranged between two adjacent mirror silver films, so that the heat radiation can pass through the original steel strip surface, thereby leading the steel strip to partially reflect heat radiation and partially transmit heat radiation, reasonably controlling the proportion of the area of the mirror silver film to the area of the long and wide surfaces in the steel strip, the heat can be stored in the cable as much as possible, and the low-smoke halogen-free flame-retardant outer sheath 6 can be sufficiently heated and frost-resistant, so that the cable has better low-temperature resistance;
the preparation method of the steel strip in the steel strip armor layer 5 comprises the following steps: pouring a certain amount of silver-ammonia complex solution and aldehyde solution as a reducing agent on the inner long and wide surface of the steel strip in a striped interval arrangement for silver mirror reaction, and reducing and depositing silver ions on the inner long and wide surface of the steel strip to form a plurality of striped interval arranged mirror silver films.
Example 5
The crosslinking reaction refers to a reaction in which 2 or more molecules (generally linear molecules) are bonded to each other to crosslink relatively stable molecules (bulk molecules) in a network structure. The reaction converts linear or slightly branched macromolecules into a three-dimensional network structure, so that the performances such as strength, heat resistance, wear resistance, solvent resistance and the like are improved, and the product can be used for foamed or unfoamed products.
The crosslinked polyethylene is prepared through chemical or physical process to change the linear molecular structure of polyethylene molecule into three-dimensional netted structure and change the thermoplastic material into thermosetting material at 70-90 deg.c temperature. Polyethylene (PE) crosslinking technology is one of the important means to improve the material properties. The performance of the cross-linked and modified PE can be greatly improved, the comprehensive performances of the mechanical property, the environmental stress cracking resistance, the chemical corrosion resistance, the creep resistance, the electrical property and the like of the butyl PE are obviously improved, the temperature resistance grade is obviously improved, the heat resistance temperature of the PE can be improved from 70 ℃ to more than 100 ℃, and the application field of the PE is greatly expanded. The crosslinking method of polyethylene includes both physical crosslinking (radiation crosslinking) and chemical crosslinking. Chemical crosslinking is further classified into silane crosslinking and peroxide crosslinking.
The crosslinked polyethylene insulated cable is produced by chemical or physical process to convert the insulating polyethylene molecule from linear molecular structure to main netted molecular structure, i.e. thermoplastic polyethylene is converted to thermosetting crosslinked polyethylene, so that it has greatly raised heat resistance and mechanical performance, reduced shrinkage, no melting after being heated and excellent electric performance maintained. The cross-linked polyethylene insulated cable is a cable suitable for the field of power distribution networks and the like, and has the advantages that a PVC insulated cable cannot achieve. It has simple structure, light weight, high heat resistance, high load capacity, no smelting, high chemical corrosion resistance and high mechanical strength.
The glass fiber is an inorganic non-metallic material with excellent performance, has various varieties, has the advantages of good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, but has the defects of brittleness and poor wear resistance. The hair-care fiber is made of seven kinds of ores of pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite through the processes of high-temperature melting, wire drawing, winding, weaving and the like, wherein the diameter of each monofilament ranges from several micrometers to twenty micrometers, the monofilament is equivalent to 1/20-1/5 of one hair, and each bundle of fiber precursor consists of hundreds of even thousands of monofilaments. Glass fibers are commonly used as reinforcing materials in composite materials, electrical and thermal insulation materials, circuit substrates, and other various fields of the national economy. Glass is a non-crystalline material that has no fixed melting point, and glass fibers are generally considered to have a softening point of 500-750 ℃ and a boiling point of 1000 ℃. The glass fiber can be divided into continuous fiber, fixed length fiber and glass wool according to shape and length; according to the glass components, the glass can be divided into alkali-free, chemical-resistant, high-alkali, medium-alkali, high-strength, high-elasticity modulus, alkali-resistant (alkali-resistant) glass fiber and the like. The infinite length of fibers drawn from platinum alloy sheets by mechanical drawing is known as continuous glass fibers and is commonly referred to as long fibers or filaments. Discontinuous fibers, made by rollers or air jets, are known as staple glass fibers, commonly referred to as staple fibers. The glass fiber fabric is various glass fiber fabrics woven by glass fiber yarns, and specifically comprises glass fiber cloth, glass belts, unidirectional fabrics, three-dimensional fabrics, profiled fabrics, glass fiber insulating sleeves and the like.
In the crosslinking reaction of polyethylene, polyethylene molecules are changed into a three-dimensional net structure from a linear molecular structure on a molecular layer, and in this case, the idea is continued, and the polyethylene is secondarily reinforced on a macroscopic layer, so that a glass fiber three-dimensional ribbon fabric with a three-dimensional grid is embedded in the ultraviolet crosslinking polyethylene insulating layer 3;
the glass fiber three-dimensional band-shaped fabric is pre-wrapped on the outer surface of the synthetic mica tape fire-resistant insulating layer 2 before the ultraviolet cross-linked polyethylene insulating layer 3 is extruded and formed, the ultraviolet cross-linked polyethylene insulating layer 3 completely wraps the glass fiber three-dimensional band-shaped fabric, an ultraviolet cross-linked polyethylene insulating material is filled in a three-dimensional grid of the glass fiber three-dimensional band-shaped fabric, and the glass fiber three-dimensional band-shaped fabric is in hot-melt connection with the ultraviolet cross-linked polyethylene insulating layer 3 in the extrusion and forming process.
The preparation method of the ultraviolet crosslinking polyethylene insulating layer 3 comprises the following steps of:
a) firstly, spinning glass fibers into glass fiber yarns, then weaving the glass fiber yarns into a glass fiber three-dimensional band-shaped fabric with three-dimensional grids, and controlling the thickness of the glass fiber three-dimensional band-shaped fabric to be 1/4-1/2 of the thickness of the ultraviolet crosslinked polyethylene insulating layer 3;
b) then lapping and wrapping the glass fiber three-dimensional ribbon fabric on the outer surface of the synthetic mica tape fire-resistant insulating layer 2 without overlapping;
c) then extruding and wrapping the mixed polyethylene insulating material on the outer surface of the wrapping layer of the glass fiber three-dimensional band-shaped fabric, extruding the molten polyethylene insulating material into a three-dimensional grid in the glass fiber three-dimensional band-shaped fabric in the extruding and wrapping process, and extruding and immersing the glass fiber three-dimensional band-shaped fabric in the molten polyethylene insulating material in the extruding and wrapping process;
d) then entering an ultraviolet radiation crosslinking device for ultraviolet crosslinking treatment;
e) and then cooling, and obtaining the ultraviolet crosslinking polyethylene insulating layer 3 after cooling.
The invention processes the glass fiber into the glass fiber yarn, weaves the glass fiber yarn into the glass fiber three-dimensional ribbon fabric with three-dimensional grid, processes the loose glass fiber which is not connected with each other into the glass fiber yarn through spinning and weaving, then weaves the glass fiber yarn into the glass fiber three-dimensional fabric which has certain length, width, height, three-dimensional shape and ribbon shape and is composed of a plurality of cuboid grids, so that the glass fiber is connected with each other, the glass fiber three-dimensional ribbon fabric can better serve as the reinforced supporting framework of the cross-linked polyethylene extrusion coating layer, the service performance and the service life of the ultraviolet cross-linked polyethylene insulating layer 3 are improved, the reinforcing principle is similar to the reinforced concrete, the reinforced concrete uses the reinforcing steel bar with label diameter instead of a pile of loose steel fiber for reinforcing the performance, furthermore, the steel bars are not independent and independent in the concrete, but the steel bars and the steel bars are connected and bound to form a three-dimensional reinforcement cage with a three-dimensional grid, so that the excellent performance of the material, namely the steel, is fully utilized, the performance of the concrete is maximally improved, the three-dimensional glass fiber ribbon fabric with the three-dimensional grid is equivalent to the reinforcement cage in the reinforced concrete, the ultraviolet crosslinked polyethylene insulating layer 3 is equivalent to the concrete in the reinforced concrete, the excellent performance of the glass fiber is fully utilized, and the service performance and the service life of the ultraviolet crosslinked polyethylene insulating layer 3 are improved.
The method and the device not described in detail in the present invention are prior art and will not be described in detail.
The principles and embodiments of the present invention have been explained herein using specific embodiments, which are merely used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (4)
1. A cable for buildings is characterized by comprising a copper conductor, a synthetic mica tape fire-resistant insulating layer, an ultraviolet cross-linked polyethylene insulating layer, a low-smoke halogen-free flame-retardant inner sheath, a steel tape armor layer and a low-smoke halogen-free flame-retardant outer sheath;
the copper conductor, the synthetic mica tape fire-resistant insulating layer, the ultraviolet crosslinking polyethylene insulating layer, the low-smoke halogen-free flame-retardant inner sheath, the steel tape armor layer and the low-smoke halogen-free flame-retardant outer sheath are sequentially arranged in the cable from inside to outside;
the copper conductor is wrapped and wrapped by the synthetic mica tape fire-resistant insulating layer, the synthetic mica tape fire-resistant insulating layer is wrapped and wrapped by the ultraviolet crosslinking polyethylene insulating layer in an extruded mode, the ultraviolet crosslinking polyethylene insulating layer is wrapped and wrapped by the low-smoke halogen-free flame-retardant inner sheath in an extruded mode, the low-smoke halogen-free flame-retardant inner sheath is wrapped and wrapped by the steel tape armoring layer in an extruded mode, and the steel tape armoring layer is wrapped by the low-smoke halogen-free flame-retardant outer sheath in an extruded mode;
the ultraviolet crosslinked polyethylene insulating layer is embedded with a glass fiber three-dimensional ribbon fabric with a three-dimensional grid;
the glass fiber three-dimensional band-shaped fabric is wrapped on the outer surface of the synthetic mica tape fire-resistant insulating layer in advance before the ultraviolet cross-linked polyethylene insulating layer is extruded and formed, the ultraviolet cross-linked polyethylene insulating layer completely wraps the glass fiber three-dimensional band-shaped fabric, ultraviolet cross-linked polyethylene insulating materials are filled in three-dimensional grids of the glass fiber three-dimensional band-shaped fabric, and the glass fiber three-dimensional band-shaped fabric is in hot melting connection with the ultraviolet cross-linked polyethylene insulating layer in the extrusion and forming process.
2. The architectural cable of claim 1 wherein said copper conductor is a tin-plated copper conductor.
3. The cable for building according to claim 1, characterized in that, when the cable for building includes two at least cable cores, it has fire-retardant filler to fill in the clearance between two at least cable cores, and two at least cable cores are wrapped the ligature around fire-retardant band by fire-retardant, fire-retardant band is wrapping the cladding ultraviolet ray crosslinked polyethylene insulating layer, crowded cladding of low smoke and zero halogen fire-retardant inner sheath is wrapping fire-retardant band.
4. The architectural cable according to claim 1, wherein the inner surface of the steel tape in the steel tape armor layer is coated with a plurality of mirror silver films arranged at intervals in a stripe shape, and the length direction of each mirror silver film is parallel to the length direction of the steel tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744075.9U CN210182098U (en) | 2019-05-21 | 2019-05-21 | Cable for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744075.9U CN210182098U (en) | 2019-05-21 | 2019-05-21 | Cable for building |
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| Publication Number | Publication Date |
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| CN210182098U true CN210182098U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920744075.9U Active CN210182098U (en) | 2019-05-21 | 2019-05-21 | Cable for building |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113183219A (en) * | 2021-04-30 | 2021-07-30 | 山东聚辰电缆有限公司 | Scrap collecting device for cutting power cable and method thereof |
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2019
- 2019-05-21 CN CN201920744075.9U patent/CN210182098U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113183219A (en) * | 2021-04-30 | 2021-07-30 | 山东聚辰电缆有限公司 | Scrap collecting device for cutting power cable and method thereof |
| CN113183219B (en) * | 2021-04-30 | 2022-12-13 | 山东聚辰电缆有限公司 | Scrap collecting device for cutting power cable and method thereof |
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