CN217280178U - Medium-voltage fire-resistant cable - Google Patents
Medium-voltage fire-resistant cable Download PDFInfo
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- CN217280178U CN217280178U CN202220800288.0U CN202220800288U CN217280178U CN 217280178 U CN217280178 U CN 217280178U CN 202220800288 U CN202220800288 U CN 202220800288U CN 217280178 U CN217280178 U CN 217280178U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model discloses a middling pressure fire resisting cable, include: the cable comprises a plurality of insulated wire cores, wherein each insulated wire core comprises a conductor, and a conductor shielding layer, an insulating layer, an insulated shielding layer and a metal shielding layer which are coated outside the conductor and sequentially arranged from inside to outside; the fireproof structure comprises a ceramic silicon rubber layer, a glass fiber belt fireproof layer and a high-flame-retardant belt layer which adopts glass fibers as base materials, wherein the ceramic silicon rubber layer, the glass fiber belt fireproof layer and the high-flame-retardant belt layer are sequentially arranged from inside to outside. The medium-voltage fire-resistant cable can still maintain power supply within hours after fire occurs, and is favorable for reducing the difficulty of personnel evacuation and fire rescue.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to middling pressure fire resisting cable.
Background
Most of the existing medium-voltage cables only consider the basic requirement of fire resistance, and only can prevent fire from spreading through the cables when a fire occurs, but cannot ensure power supply when the fire occurs.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a middling pressure fire resisting cable still can keep the power supply in several hours after the fire takes place, is favorable to reducing the degree of difficulty that personnel are sparse, fire rescue.
According to the utility model discloses a middling pressure fire resisting cable, include: the cable comprises a plurality of insulation wire cores, wherein each insulation wire core comprises a conductor, and a conductor shielding layer, an insulation shielding layer and a metal shielding layer which are coated outside the conductor, the conductor shielding layer, the insulation shielding layer and the metal shielding layer are sequentially arranged from inside to outside, the insulation wire cores are twisted with one another to form a cable core, a wrapping tape layer, an oxygen isolation layer, a steel strip armoring layer and an outer sheath are coated outside the cable core, the wrapping tape layer, the oxygen isolation layer, the steel strip armoring layer and the outer sheath are sequentially arranged from inside to outside, and fillers are arranged in gaps among the insulation wire cores and gaps among the cable core and the wrapping tape layer; the fireproof structure comprises a ceramic silicon rubber layer, a glass fiber belt fireproof layer and a high-flame-retardant belt layer which adopts glass fibers as base materials, wherein the ceramic silicon rubber layer and the glass fiber belt fireproof layer are sequentially arranged from inside to outside.
According to the utility model discloses middling pressure fire resisting cable has following beneficial effect at least: when a fire disaster occurs, the medium-voltage fire-resistant cable is protected by the outer sheath, the power supply is not influenced by the firing in a short time, after the outer sheath is burnt, flame and heat are isolated by a fire-resistant structure arranged between the steel tape armoring layer and the outer sheath, wherein the glass fiber tape fire-resistant layer and the high-flame-resistant tape layer both adopt glass fibers as base materials, are high-temperature resistant and can not be combusted, so that the flame can be effectively isolated, the ceramic silicon rubber layer can absorb heat and form a ceramic shell when the temperature of the ceramic silicon rubber layer reaches more than 250 ℃, so that the heat can be effectively isolated, when the heat penetrates through the ceramic silicon rubber layer and is continuously transmitted to the inside, the heat can be further isolated by the steel tape armoring layer and oxygen can be isolated by the oxygen isolation layer so as to prevent the cable core from being combusted, and the medium-voltage fire-resistant cable can still maintain power supply within hours after the fire disaster occurs, is favorable for reducing the difficulty of personnel evacuation and fire rescue.
According to some embodiments of the invention, the conductor shield and the insulation shield are made of cross-linked semiconductive polyolefin material.
According to some embodiments of the invention, the insulating layer is made of a cross-linked polyethylene material.
According to some embodiments of the invention, the metal shielding layer is made of copper tape or copper wire.
According to the utility model discloses a some embodiments, around band layer by two-layer adoption fine as the high fire-retardant covering of substrate around the band overlap take the lid to form around the package.
According to some embodiments of the utility model, the oxygen barrier layer adopts high fire resistance ability low smoke and zero halogen material to make.
According to some embodiments of the present invention, the thickness of the oxygen barrier layer is 2.8mm to 3.2 mm.
According to some embodiments of the utility model, the steel strip armor layer is formed by two-layer galvanized steel strip clearance overlap lid.
According to some embodiments of the present invention, the outer sheath is made of a high flame retardant class a low smoke zero halogen material.
According to some embodiments of the present invention, the filler is a low smoke zero halogen high flame retardant filler rope.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a medium voltage fire resistant cable according to an embodiment of the present invention.
Reference numerals:
the cable comprises a conductor 100, a conductor shielding layer 110, an insulating layer 120, an insulating shielding layer 130, a metal shielding layer 140, a wrapping tape layer 200, an oxygen barrier layer 300, a steel tape armor layer 400, an outer sheath 500, a filler 600, a ceramic silicon rubber layer 700, a glass fiber tape fireproof layer 800 and a high flame retardant tape layer 900.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the orientation or positional relationship indicated by upper, lower, front, rear, left, right, etc. is the orientation or positional relationship shown on the drawings, it is only for convenience of description and simplification of the description, and it is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, if there are several, greater than, less than, exceeding, above, below, within, etc., the terms, wherein several means are one or more, and several means are two or more, and greater than, less than, exceeding, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.
In the description of the present invention, if the terms first, second, etc. appear, they are only used for distinguishing technical features, but they are not to be interpreted as indicating or implying relative importance or implying that the number of the indicated technical features is indicated or that the precedence of the indicated technical features is implied.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, according to the embodiment of the present invention, a medium voltage fire resistant cable includes a plurality of insulated wire cores, the insulated wire cores include a conductor 100 and a conductor shielding layer 110, an insulating layer 120, an insulated shielding layer 130 and a metal shielding layer 140 covering the conductor 100, the conductor shielding layer 110, the insulating layer 120, the insulated shielding layer 130 and the metal shielding layer 140 are sequentially disposed from inside to outside, the plurality of insulated wire cores are twisted with each other to form a cable core, the cable core is covered by a wrapping tape layer 200, an oxygen barrier 300, a steel tape armor 400 and an outer sheath 500, the wrapping tape layer 200, the oxygen barrier 300, the steel tape armor 400 and the outer sheath 500 are sequentially disposed from inside to outside, fillers 600 are disposed in gaps between the plurality of insulated wire cores and gaps between the cable core and the wrapping tape layer 200, wherein a fire resistant structure is disposed between the steel tape armor 400 and the outer sheath 500, the fire resistant structure includes a ceramic silicon rubber layer 700 sequentially disposed from inside to outside, A glass fiber tape fireproof layer 800 and a high flame retardant tape layer 900 using glass fiber as a base material.
When a fire disaster occurs, the medium voltage fire-resistant cable is protected by the outer sheath 500, the power supply is not affected by the firing in a short time, after the outer sheath 500 is burnt, the flame and heat are isolated by the fire-resistant structure arranged between the steel tape armoring layer 400 and the outer sheath 500, wherein, the glass fiber tape fire-resistant layer 800 and the high fire-resistant tape layer 900 both adopt glass fibers as base materials, are high temperature resistant and can not burn, thereby effectively isolating the flame, and the ceramic silicon rubber layer 700 can absorb the heat and form a ceramic shell when the temperature reaches above 250 ℃, thereby effectively isolating the heat, when the heat penetrates through the ceramic silicon rubber layer 700 to continue to transmit to the inside, the heat can be further isolated by the steel tape armoring layer 400 and the oxygen can be isolated by the oxygen isolation layer 300 to prevent the cable core from burning, the medium voltage fire-resistant cable can still maintain the power supply within hours after the fire disaster occurs, is favorable for reducing the difficulty of personnel evacuation and fire rescue.
It should be noted that in some embodiments, conductor shield 110 and insulation shield 130 are made of cross-linked semiconductive polyolefin material, which is beneficial to prevent non-uniformity of electric field.
It should be noted that, in some embodiments, the insulating layer 120 is made of a cross-linked polyethylene material, and the cross-linked polyethylene material has a low dielectric loss, and has excellent low temperature resistance and high temperature resistance.
It should be noted that, in some embodiments, the metal shielding layer 140 is made of a copper strip or a copper wire, and preferably, the metal shielding layer 140 is made of a copper wire, which has better shielding efficiency compared to a copper strip, is beneficial to preventing the metal shielding layer 140 from failing due to fracture, and is beneficial to reducing the maintenance cost in the later period.
It should be noted that, in some embodiments, the wrapping tape layer 200 is formed by overlapping and lapping two layers of high-flame-retardant wrapping tapes which use glass fibers as a base material, so that the wrapping tape layer 200 has good flame-retardant performance and certain heat-insulating performance.
It should be noted that, in some embodiments, the oxygen-barrier layer 300 is made of a low-smoke halogen-free material with high flame retardant property, so that the oxygen-barrier layer 300 not only can isolate oxygen, but also has good flame retardant property and heat insulation property, and meanwhile, the low-smoke halogen-free material with high flame retardant property does not generate corrosive gas and toxic gas when burning, and has low smoke generation amount, thereby being beneficial to escape of people in disaster.
It is noted that in some of the embodiments, the thickness of the oxygen barrier layer 300 is 2.8mm to 3.2mm, and preferably, the thickness of the oxygen barrier layer 300 is 3 mm.
It should be noted that in some embodiments, the steel tape armoring layer 400 is formed by covering two galvanized steel tapes with a gap, which can effectively isolate flame.
It should be noted that, in some embodiments, the outer sheath 500 is made of a high-flame-retardant class a low-smoke halogen-free material, so that the outer sheath 500 has good self-extinguishing and flame-retardant effects, and meanwhile, the high-flame-retardant class a low-smoke halogen-free material does not generate corrosive gas and toxic gas when burning, and has low smoke yield, thereby facilitating escape of people suffering from a disaster.
It should be noted that, in some embodiments, the filler 600 is a low-smoke halogen-free high-flame-retardant filler rope, so that the filler 600 has good flame-retardant performance and heat-insulating performance, and meanwhile, when the low-smoke halogen-free high-flame-retardant filler rope is burned, corrosive gas and toxic gas are not generated, and the smoke generation amount is low, thereby facilitating escape of people suffering from a disaster.
In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", and "some examples", etc., it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A medium voltage fire resistant cable, comprising:
a plurality of insulated wire cores, wherein each insulated wire core comprises a conductor (100), and a conductor shielding layer (110), an insulating layer (120), an insulating shielding layer (130) and a metal shielding layer (140) which are coated outside the conductor (100), the conductor shielding layer (110), the insulating layer (120), the insulating shielding layer (130) and the metal shielding layer (140) are sequentially arranged from inside to outside, a plurality of insulating wire cores are mutually twisted to form a cable core, the cable core is coated with a wrapping tape layer (200), an oxygen isolation layer (300), a steel tape armor layer (400) and an outer sheath (500), the winding and wrapping band layer (200), the oxygen isolation layer (300), the steel tape armor layer (400) and the outer sheath (500) are sequentially arranged from inside to outside, and fillers (600) are arranged in gaps among the plurality of insulating wire cores and gaps between the cable core and the winding and wrapping band layer (200);
a fire-resistant structure is arranged between the steel tape armor layer (400) and the outer sheath (500), and the fire-resistant structure comprises a ceramic silicon rubber layer (700), a glass fiber tape fire-resistant layer (800) and a high-fire-resistant tape layer (900) which adopts glass fibers as base materials, wherein the ceramic silicon rubber layer and the glass fiber tape fire-resistant layer are sequentially arranged from inside to outside.
2. The medium voltage fire resistant cable according to claim 1, wherein the conductor shield (110) and the insulation shield (130) are made of a cross-linked semiconductive polyolefin material.
3. Medium voltage fire resistant cable according to claim 1, characterized in that the insulating layer (120) is made of cross-linked polyethylene material.
4. The medium voltage fire resistant cable according to claim 1, characterized in that the metallic shielding layer (140) is made of copper tape or copper wire.
5. The medium voltage fire resistant cable according to claim 1, wherein the wrapping tape layer (200) is formed by overlapping and lapping two layers of high flame retardant wrapping tape using glass fiber as a substrate.
6. The medium voltage fire resistant cable according to claim 1, wherein the oxygen barrier (300) is made of a high flame retardant low smoke halogen free material.
7. The medium voltage fire resistant cable according to claim 6, wherein the thickness of the oxygen barrier layer (300) is between 2.8mm and 3.2 mm.
8. The medium voltage fire resistant cable according to claim 1, wherein the steel tape armouring layer (400) is overlapped by two galvanized steel tape gaps.
9. The medium voltage fire resistant cable according to claim 1, wherein the outer sheath (500) is made of a high flame retardant class a low smoke halogen free material.
10. The medium voltage fire resistant cable according to claim 1, wherein the filler (600) is a low smoke zero halogen high flame retardant filler rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220800288.0U CN217280178U (en) | 2022-04-07 | 2022-04-07 | Medium-voltage fire-resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220800288.0U CN217280178U (en) | 2022-04-07 | 2022-04-07 | Medium-voltage fire-resistant cable |
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| Publication Number | Publication Date |
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| CN217280178U true CN217280178U (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220800288.0U Active CN217280178U (en) | 2022-04-07 | 2022-04-07 | Medium-voltage fire-resistant cable |
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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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2022
- 2022-04-07 CN CN202220800288.0U patent/CN217280178U/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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