CN211555554U - Light flexible medium-voltage fireproof cable - Google Patents
Light flexible medium-voltage fireproof cable Download PDFInfo
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- CN211555554U CN211555554U CN202020561435.4U CN202020561435U CN211555554U CN 211555554 U CN211555554 U CN 211555554U CN 202020561435 U CN202020561435 U CN 202020561435U CN 211555554 U CN211555554 U CN 211555554U
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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
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- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model discloses a light-duty flexible middling pressure fireproof cable belongs to fireproof cable, the utility model discloses the technical problem who solves is the fire-resistant security level of how to improve fireproof cable, and the installation of being convenient for simultaneously is laid and low cost, and the technical scheme of adoption is: its structure includes the cable core that from interior to exterior set gradually, around covering one, fire-retardant cooling separates the oxygen layer, around covering two, separate fire layer one, around covering three, the armor, around covering four, separate fire layer two, around covering five and oversheath layer, the outside parcel of cable core has around covering one, there is fire-retardant cooling to separate the oxygen layer around covering one outside parcel, fire-retardant cooling separates the outside parcel of oxygen layer and has around covering two, there is fire layer one around the outside parcel of covering two, it has around covering three to separate the outside parcel of fire layer, there is the armor around covering three outside parcel, armor outside parcel has around covering four, there is fire layer two around the outside parcel of covering four, it has five to separate the outside parcel of fire layer, there is the oversheath layer around five outside parcels of covering.
Description
Technical Field
The utility model relates to a fireproof cable, specifically speaking are light-duty flexible middling pressure fireproof cable.
Background
The fireproof cable is widely applied to places such as high-rise buildings, hotels and restaurants, hospitals, schools, business centers, logistics warehouses, airports, stations, ports, subways, coal, petrochemical industry, fire prevention, explosion prevention, high temperature and the like. Due to the rapid development of national economic construction, the use of a large amount of power and energy utilization facilities leads to the multiplied increase of power load. If the low-voltage fire-resistant cable of 1kV or below is adopted for power distribution in important places such as high-rise buildings and super high-rise buildings, the cable consumption and the laying and installation workload are increased by tens of times compared with the common cable consumption and laying and installation workload, the cable laying space is also increased by several times, the material consumption and the energy consumption are both consumed, and the potential fire hazard is also brought because the cable laying in the building is too much and too dense.
The national more and more attach importance to fire safety and the continuous improvement of people's fire safety consciousness, simultaneously along with the research and development of middling pressure fireproof cable and the technology mature day by day, middling pressure fireproof cable will obtain more extensive application in the distribution system of important places such as high-rise, super high-rise building, market space inestimable.
The existing medium-voltage fireproof cables on the market generally have the following problems:
(1) too short a fire-resistant time to provide sufficient rescue time;
(2) the outer diameter of the cable is too large, so that the installation and the laying are difficult;
(3) and the price of the cable is too high, and the market acceptance is limited.
In summary, how to improve the fire-resistant safety level of the fireproof cable, and meanwhile, the fireproof cable is convenient to install and lay and low in cost is a technical problem to be solved urgently at present.
Disclosure of Invention
The technical task of the utility model is to provide a light-duty flexible middling pressure fireproof cable, solve the fire-resistant security level that how to improve fireproof cable, be convenient for simultaneously install and lay and low cost's problem.
The technical task of the utility model is realized according to following mode, a light-duty flexible middling pressure fireproof cable, cable core including from interior to exterior set gradually, around covering one, fire-retardant cooling separates the oxygen layer, around covering two, separate fire layer one, around covering three, the armor, around covering four, separate fire layer two, around covering five and oversheath layer, the outside parcel of cable core has around covering one, there is fire-retardant cooling around covering one outside parcel and separates the oxygen layer, fire-retardant cooling separates the outside parcel of oxygen layer and has around covering two, there is fire layer one around the outside parcel of covering two, it has around covering three to separate the outside parcel of fire layer, there is the armor around three outside parcels, armor outside parcel has around covering four, there is fire layer two around the outside parcel of covering, it has around covering five to separate the outside parcel of fire layer, there is the oversheath layer five outside parcel of covering five.
Preferably, the cable core comprises at least three wire cores which are distributed circumferentially, and a filling layer is arranged in a cavity formed by the wire cores and the first wrapping layer.
More preferably, the sinle silk includes conductor layer, conductor shield, insulating layer, insulation shielding layer and the metallic shield that from interior to exterior set gradually, and the outside parcel of conductor layer has the conductor shield, and the outside parcel of conductor shield has the insulating layer, and the outside parcel of insulating layer has the insulation shielding layer, and the outside parcel of insulation shielding layer has the metallic shield.
Preferably, the flame-retardant cooling oxygen-insulating layer is formed by extruding and wrapping a halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer material with an oxygen index of more than 45; the thickness of the flame-retardant temperature-reducing oxygen-isolating layer is 3.0-5.0 mm.
Preferably, the first fire-insulating layer and the second fire-insulating layer are both formed by extruding ceramic polyolefin sheath materials, and the thicknesses of the first fire-insulating layer and the second fire-insulating layer are both 2.0mm-3.0 mm.
Preferably, the first wrapping layer adopts two layers of alkali-free glass fiber wrapping tapes;
the second wrapping layer adopts a layer of alkali-free glass fiber wrapping tape;
the third lapping layer adopts two layers of alkali-free glass fiber lapping tapes;
the fourth lapping layer adopts a layer of alkali-free glass fiber lapping tape;
and the fifth lapping layer adopts a layer of alkali-free glass fiber lapping tape.
Preferably, the armor layer is armored by steel belt linkage;
the outer sheath layer is made of halogen-free low-smoke flame-retardant polyolefin sheath material.
Preferably, the conductor layer is formed by twisting AA8030 series aluminum alloy conductors, and the aluminum alloy conductors are subjected to a special pressing process and annealing treatment; in the continuous casting and rolling production of the aluminum alloy rod, beneficial elements such as rare earth, copper, iron, magnesium and the like are added into pure aluminum molten liquid in proportion, so that the electrical property, the mechanical property, the high-temperature resistance stability and the like of the conductor are greatly improved; adopt desk-top annealing stove to carry out artifical aging treatment, adopt "honeycomb" formula pure iron dish utensil of designing according to "heat radiation" rule to carry out annealing treatment, the conductor is heated and is cooled down simultaneously, makes the full length conductor have outstanding mechanical properties.
Preferably, the conductor shielding layer is a cross-linked extruded semi-conducting layer, uniformly coated on the conductor layer, smooth in surface, free from particles, scorched or scratched traces, and 0.7-0.8 mm in thickness;
the insulating layer is made of ultra-pure crosslinked polyethylene insulating material;
the insulation shielding layer is extruded by using a strippable or non-strippable semiconductive outer shielding material, the surface of the semiconductive shielding layer is smooth and free from particles, scorched or scratched traces, and the thickness of the insulation shielding layer is 0.6-0.8 mm;
the metal shielding layer adopts a copper strip or a copper wire, and the metal shielding structure is determined according to the cable ground fault cable.
More preferably, the filling layer adopts alkali-free glass fiber yarn.
The utility model discloses a light-duty flexible middling pressure fireproof cable has following advantage:
the cable structure design adopts a multiple protection structure of a filling layer, a flame-retardant cooling oxygen-insulating layer, a fire-insulating layer I, a fire-insulating layer II and an armor layer, so that the phenomenon that insulation is affected by fire to cause breakdown is avoided under the condition of fire;
the conductor layer adopts AA-8030 series aluminum alloy conductors, the aluminum alloy conductors have excellent bending property, creep resistance and corrosion resistance, the cable can be ensured to keep stable continuous performance when overloaded and overheated for a long time, and the weight of the aluminum alloy cable is about half of that of a copper cable when the current-carrying capacity is the same; the aluminum alloy cable is adopted to replace a copper cable, so that the weight of the cable can be reduced, the installation cost can be reduced, and the abrasion of equipment and the cable can be reduced;
thirdly, the cabling filling layer adopts alkali-free glass fiber yarns to play a role in heat insulation; the section of the alkali-free glass fiber yarn is cylindrical, a good gap channel is formed between every two yarns after the alkali-free glass fiber yarn is filled into a cable, the channel can play a good radiating role, heat generated in normal operation of the cable can be radiated through a plurality of gap channels among the alkali-free glass fiber yarns, heat conducted from the outside can also be conducted out through the channels when a fire disaster occurs, the gap channels are blocked to a great extent after other filling materials are twisted, the radiating effect is greatly weakened, no harmful gas is generated after the alkali-free glass fiber yarn is combusted, and the cable is safe and environment-friendly;
the utility model is provided with five layers of wrapping layers, the wrapping layers adopt fire-resistant flame-retardant wrapping tapes, and the alkali-free glass fiber wrapping tapes are adopted for a plurality of times, so that the novel fire-retardant wrapping tape has the advantages of strong tension, no halogen, smoke and toxicity, high flame retardance, oxygen and fire isolation, and the like;
the flame-retardant cooling oxygen-isolating layer adopts an extruded halogen-free low-smoke flame-retardant polyolefin material, the extruded halogen-free low-smoke flame-retardant polyolefin is decomposed into metal oxides and crystal water is separated out when encountering fire, the metal oxides are decomposed to form a net structure and have a certain adsorption effect on smoke, and the separated crystal water not only has an obvious sedimentation effect on smoke particles, but also has a good heat absorption effect, delays the combustion speed and the rapid temperature rise of the cable, and simultaneously the material does not contain halogen, generates less smoke in the combustion process, and has the advantages of reducing environmental pollution and the like;
sixthly, the fire insulation layer I and the fire insulation layer II are both made of extruded ceramic polyolefin materials, and a ceramic shell generated by burning the ceramic polyolefin does not crack or drip, so that the ceramic shell has excellent electrical isolation performance and excellent oxygen insulation and heat insulation effects; the fire barrier layer I and the fire barrier layer two-combined structure can effectively isolate the infringement of high-temperature flame to the circuit inside, delay the decomposition of internal material, avoid the conductor to fuse in flame, guarantee the unblocked of circuit under the conflagration condition, and the ceramic polyolefin raw materials compares with current ceramic silicon rubber, ceramic silicon rubber composite band simultaneously, has two outstanding advantages: firstly, the process for manufacturing the wires and the cables is simplified, vulcanization is not needed, and the efficiency is greatly improved; secondly, the cost can be reduced by about 30 percent;
and (seventhly), the melting point of the steel strip adopted by the armor layer is about 1500 ℃, so that the requirements of related fire resistance tests are met. The steel belt interlocking armor is adopted, and the interlocking structure between layers ensures that the cable can bear strong external destructive force, so that the cable is not easy to break even if the cable is subjected to larger pressure and impact force, and the safety performance is improved; the armor structure isolates the cable from the outside, even in case of fire, the armor layer improves the flame-retardant fire-resistant level of the cable, reduces the danger coefficient of the fire, and simultaneously the interlocking armor structure enables the cable to have good heat dissipation performance and excellent flame-retardant performance, thereby conforming to the relevant cable combustion standards of GB/T18380 and the like;
the invention (eighthly) innovatively provides a cable structure, and through the design of materials and structures, the cable is superior in fireproof performance and high in safety and environmental protection level on the whole, and meanwhile, the cable is light in weight, flexible on the whole, convenient to install and lay, and low in installation and production cost.
The utility model has the characteristics of reasonable in design, simple structure, easily processing, small, convenient to use, a thing is multi-purpose etc, therefore, has fine popularization and use value.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a light flexible medium-voltage fireproof cable.
In the figure: 1. conductor layer, 2, conductor shielding layer, 3, insulating layer, 4, insulating shielding layer, 5, metallic shield, 6, filling layer, 7, around covering one, 8, fire-retardant cooling separates the oxygen layer, 9, around covering two, 10, separate fire layer one, 11, around covering three, 12, armor, 13, around covering four, 14, separate fire layer two, 15, around covering five, 16, oversheath layer.
Detailed Description
The light flexible medium voltage fireproof cable of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and for simplification of description. And are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in the attached figure 1, the light flexible medium-voltage fireproof cable of the utility model structurally comprises a cable core, a wrapping layer I7, a flame-retardant temperature-reducing oxygen-isolating layer 8, a wrapping layer II 9 and a fire-isolating layer I10 which are arranged in sequence from inside to outside, around covering three 11, armor 12, around covering four 13, separate fire layer two 14, around covering five 15 and oversheath layer 16, the outside parcel of cable core has around covering one 7, there is fire-retardant cooling around covering one 7 outside parcel at a distance from oxygen layer 8, fire-retardant cooling separates the outside parcel of oxygen layer 8 and has around covering two 9, there is a fire layer one 10 around the outside parcel of covering two 9, it has around covering three 11 to separate the outside parcel of fire layer one 10, there is armor 12 around the outside parcel of covering three 11, there is around covering four 13 armor 12 outside parcel, there is a fire layer two 14 around the outside parcel of covering four 13, it has around covering five 15 to separate the outside parcel of fire layer two 14, there is oversheath layer 16 around the outside parcel of covering five 15. Wherein, the flame-retardant cooling oxygen-insulating layer 8 is formed by extruding and wrapping a halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer material with an oxygen index of more than 45; the thickness of the flame-retardant temperature-reducing oxygen-isolating layer 8 is 3.0-5.0 mm. The first fire-insulating layer 10 and the second fire-insulating layer 14 are both formed by extruding ceramic polyolefin sheath materials, and the thicknesses of the first fire-insulating layer 10 and the second fire-insulating layer 14 are both 2.0mm-3.0 mm. The first lapping layer 7 adopts two layers of alkali-free glass fiber lapping tapes; the second lapping layer 9 adopts a layer of alkali-free glass fiber lapping tape; the third lapping layer 11 adopts two layers of alkali-free glass fiber lapping tapes; the fourth lapping layer 13 adopts a layer of alkali-free glass fiber lapping tape; and a fifth lapping layer 15 adopts a layer of alkali-free glass fiber lapping tape. The armor layer 12 is armored by steel belts in a linkage manner; the outer sheath layer 16 is made of halogen-free low-smoke flame-retardant polyolefin sheath material. The cable core includes that three are circumference distribution's sinle silk, is filled with filling layer 6 by sinle silk and around the cavity that covering 7 formed. The sinle silk includes that from interior to exterior sets gradually conductor layer 1, conductor shielding layer 2, insulating layer 3, insulating shield 4 and metallic shield 5, and the outside parcel of conductor layer 1 has conductor shielding layer 2, and the outside parcel of conductor shielding layer 2 has insulating layer 3, and the outside parcel of insulating layer 3 has insulating shield 4, and the outside parcel of insulating shield 4 has metallic shield 5. The conductor layer 1 is formed by stranding AA8030 series aluminum alloy conductors, and the aluminum alloy conductors adopt a special pressing process and annealing treatment; in the continuous casting and rolling production of the aluminum alloy rod, beneficial elements such as rare earth, copper, iron, magnesium and the like are added into pure aluminum molten liquid in proportion, so that the electrical property, the mechanical property, the high-temperature resistance stability and the like of the conductor are greatly improved; adopt desk-top annealing stove to carry out artifical aging treatment, adopt "honeycomb" formula pure iron dish utensil of designing according to "heat radiation" rule to carry out annealing treatment, the conductor is heated and is cooled down simultaneously, makes the full length conductor have outstanding mechanical properties. The conductor shielding layer 2 is a cross-linked extruded semi-conducting layer, uniformly coated on the conductor layer, smooth in surface, free from particles, scorched or scratched traces, and 0.7-0.8 mm in thickness; the insulating layer 3 is made of ultra-pure crosslinked polyethylene insulating material; the insulation shielding layer 4 is extruded by using a strippable or non-strippable semiconductive outer shielding material, the surface of the semiconductive outer shielding layer is smooth and free from particles, scorching or scratching marks, and the thickness of the insulation shielding layer 4 is 0.6-0.8 mm; the metal shielding layer 5 adopts a copper strip or a copper wire, and a metal shielding structure is determined according to the cable ground fault cable. The filling layer 6 adopts alkali-free glass fiber yarn.
The cavity that the sinle silk stranding formed is filled with filling layer 6, after the stranding, two layers of alkali-free glass fiber wrapping tapes are wrapped as wrapping layer one 7, wrapping layer one 7 is wrapped with fire-retardant cooling oxygen-isolating layer 8, 8 outer portions of fire-retardant cooling oxygen-isolating layer are wrapped with one layer of alkali-free glass fiber wrapping tape as wrapping layer two 9, wrapping layer two 9 is wrapped with fire-isolating layer one 10, two layers of alkali-free glass fiber wrapping tapes are wrapped with fire-isolating layer one 10 in an overlapping mode and serve as wrapping layer three 11, the three 11 outer portions of wrapping layer adopt steel belt chain armoring to serve as armor layer 12, one layer of alkali-free glass fiber wrapping tape is wrapped with one layer of alkali-free glass fiber wrapping tape as wrapping layer four 13 after the armor, wrapping layer four 13 is wrapped with fire-isolating layer two 14, one layer of alkali-free glass fiber wrapping tape is wrapped with wrapping layer five 15 after two layers of fire-isolating layer 14 in an extruding mode.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a light-duty flexible middling pressure fireproof cable, a serial communication port, cable core including from interior to exterior setting gradually, around covering one, fire-retardant cooling separates the oxygen layer, around covering two, separate fire bed one, around covering three, the armor, around covering four, separate fire bed two, around covering five and oversheath layer, the outside parcel of cable core has around covering one, there is fire-retardant cooling to separate the oxygen layer around covering one outside parcel, fire-retardant cooling separates the outside parcel of oxygen layer and has around covering two, there is a fire bed one around the outside parcel of covering two, it has around covering three to separate a fire bed one outside parcel, there is the armor around the outside parcel of covering three, armor outside parcel has around covering four, there is a fire bed two around the outside parcel of covering four, it has around covering five to separate the outside parcel of fire bed, five outside parcels of covering have the oversheath layer.
2. The lightweight flexible medium voltage fireproof cable according to claim 1, wherein the cable core comprises at least three circumferentially arranged wire cores, and a filling layer is arranged in a cavity formed by the wire cores and the first wrapping layer.
3. The light-duty flexible medium voltage fireproof cable of claim 2, wherein the wire core comprises a conductor layer, a conductor shielding layer, an insulating layer, an insulation shielding layer and a metal shielding layer which are sequentially arranged from inside to outside, the conductor shielding layer is wrapped outside the conductor layer, the insulating layer is wrapped outside the conductor shielding layer, the insulation shielding layer is wrapped outside the insulation shielding layer, and the metal shielding layer is wrapped outside the insulation shielding layer.
4. The light flexible medium-voltage fireproof cable according to claim 1, wherein the flame-retardant temperature-reducing oxygen-insulating layer is formed by extruding and wrapping a halogen-free low-smoke flame-retardant polyolefin oxygen-insulating layer material with an oxygen index of more than 45; the thickness of the flame-retardant temperature-reducing oxygen-isolating layer is 3.0-5.0 mm.
5. The light-duty flexible medium voltage fireproof cable of claim 1, wherein the first fire barrier layer and the second fire barrier layer are extruded from a ceramic polyolefin sheath material, and the thickness of the first fire barrier layer and the second fire barrier layer is 2.0mm-3.0 mm.
6. The lightweight flexible medium voltage fireproof cable according to claim 1, wherein the first wrapping layer is two layers of alkali-free glass fiber wrapping tape;
the second wrapping layer adopts a layer of alkali-free glass fiber wrapping tape;
the third lapping layer adopts two layers of alkali-free glass fiber lapping tapes;
the fourth lapping layer adopts a layer of alkali-free glass fiber lapping tape;
and the fifth lapping layer adopts a layer of alkali-free glass fiber lapping tape.
7. A light weight flexible medium voltage fireproof cable according to any one of claims 4 to 6, wherein the armouring layer is steel tape interlocked armouring;
the outer sheath layer is made of halogen-free low-smoke flame-retardant polyolefin sheath material.
8. A lightweight flexible medium voltage fire cable according to claim 3, wherein said conductor layer is stranded using AA8030 series aluminium alloy conductors.
9. The light-duty flexible medium voltage fireproof cable of claim 3, wherein the conductor shielding layer is a cross-linked extruded semi-conductive layer uniformly coated on the conductor layer, and the thickness of the conductor shielding layer is 0.7mm-0.8 mm;
the insulating layer is made of ultra-pure crosslinked polyethylene insulating material;
the insulation shielding layer is extruded by using a strippable or non-strippable semi-conductive outer shielding material, and the thickness of the insulation shielding layer is 0.6-0.8 mm;
the metal shielding layer adopts a copper strip or a copper wire.
10. A light-weight flexible medium voltage fireproof cable according to claim 3, wherein the filler layer is alkali-free glass fiber yarn.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020561435.4U CN211555554U (en) | 2020-04-15 | 2020-04-15 | Light flexible medium-voltage fireproof cable |
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| CN202020561435.4U CN211555554U (en) | 2020-04-15 | 2020-04-15 | Light flexible medium-voltage fireproof cable |
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| CN211555554U true CN211555554U (en) | 2020-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115924656A (en) * | 2023-03-15 | 2023-04-07 | 天津北达线缆集团有限公司 | Assembled medium-voltage flexible cable |
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2020
- 2020-04-15 CN CN202020561435.4U patent/CN211555554U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115924656A (en) * | 2023-03-15 | 2023-04-07 | 天津北达线缆集团有限公司 | Assembled medium-voltage flexible cable |
| CN115924656B (en) * | 2023-03-15 | 2023-05-16 | 天津北达线缆集团有限公司 | Assembled medium-voltage flexible cable |
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