CN217061496U - Middle-high voltage ceramic fire-resistant silicone rubber cable - Google Patents
Middle-high voltage ceramic fire-resistant silicone rubber cable Download PDFInfo
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- CN217061496U CN217061496U CN202123256552.3U CN202123256552U CN217061496U CN 217061496 U CN217061496 U CN 217061496U CN 202123256552 U CN202123256552 U CN 202123256552U CN 217061496 U CN217061496 U CN 217061496U
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Abstract
The utility model discloses a middle and high voltage ceramic fire-resistant silicon rubber cable, which comprises a conductor; the outer surface of the conductor winds a conductor shielding layer, the insulating layer is extruded out of the outer surface of the conductor shielding layer and is made of cross-linked polyethylene, the insulating layer is made of cross-linked polyethylene, the metal shielding layer forms a cable core, the outer surface of the insulating layer is provided with an oxygen insulation cooling layer, an outer sheath is wound outside the oxygen insulation cooling layer, and the outer sheath is made of ceramic silicon rubber. The utility model discloses the surface of cable has adopted the fire-resistant silicon rubber of pottery that low temperature burns till can be able to bear or endure 1200 ℃ -1500 ℃ high temperature flame ablation after the vitrification, and the insulating layer has been wrapped up in the cooperation in addition and high pressure resistant packing, under the circumstances of conflagration, guarantees that the cable can normally work in the 90min of regulation (cable core is not super 300 ℃), and the insulating layer adopts crosslinked polyethylene, and this material not only can play insulating effect, and has very excellent heat resistance.
Description
Technical Field
The utility model relates to the technical field of cables, specifically a fire-resistant silicon rubber cable of medium and high voltage pottery.
Background
The main material of the ceramic fire-resistant silicon rubber is heat-vulcanized silicon rubber, the main material has the basic characteristics of silicon rubber at normal temperature, such as no toxicity, no odor, high and low temperature resistance, ozone aging resistance, excellent electrical performance, good processing performance and the like, the silicon rubber summarizes the characteristics of the silicon rubber of electric wires and cables which are prepared by adding additives, and the silicon rubber forms a hard ceramic protective layer under the condition of 500-DEG or even flame ablation above 700 ℃, so that the effects of flame isolation and fire prevention are achieved, and the smoothness of electric power and communication is ensured under the condition of fire, so the cable prepared by the ceramic fire-resistant silicon rubber is often applied to high-temperature places, but the existing ceramic fire-resistant silicon rubber cable has the following problems:
1. the existing ceramic fire-resistant silicon rubber cable is only simply wrapped on a common cable by ceramic fire-resistant silicon rubber, although the ceramic fire-resistant silicon rubber can bear external high temperature and cannot be melted, the internal insulating material is easily damaged due to the high temperature, so that the insulating effect is reduced, and certain potential safety hazards exist;
2. in addition, the existing ceramic fire-resistant silicon rubber cable cannot be bent at will in order to ensure the high-pressure resistance of the cable when in use, and cracks are easy to appear during long-time bending to cause oxygen to enter, so that the cable is rapidly aged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fire-resistant silicon rubber cable of medium and high voltage pottery to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a middle-high voltage ceramic fire-resistant silicon rubber cable comprises a conductor; the outer surface of the conductor winds a conductor shielding layer, an insulating layer is extruded on the outer surface of the conductor shielding layer, the insulating layer is made of cross-linked polyethylene, the insulating layer winds an insulating shielding layer externally, a metal shielding layer is woven outside the insulating shielding layer, a cable core is formed by the four metal shielding layers, a winding tape winds the outer surface of the cable core, a winding thermal insulation layer winds outside the winding tape, an oxygen insulation cooling layer is arranged on the outer surface of the thermal insulation layer, an outer covering jacket winds the outside of the oxygen insulation cooling layer, the oxygen insulation cooling layer adopts a low-smoke halogen-free material, the outer covering adopts a ceramic silicon rubber material, and belts are arranged on the outer surface of the outer covering at equal intervals;
the heat insulation layer is formed by wrapping ceramic fiber paper, and the overlapping position of the heat insulation layer is not less than 50%.
Preferably, the conductor is formed by twisting a plurality of strands of bare copper wires or tinned copper wires in the same direction concentrically, and the pitches of the inner layer and the outer layer are consistent.
Preferably, the conductor shielding layer is wrapped by carbon-plated conductive cloth, and the overlapping position of the conductor shielding layer is not less than 15%.
Preferably, the insulation shielding layer is wrapped by carbon-plated conductive cloth, the overlapping is not less than 20%, the thickness of the carbon-plated conductive cloth of the conductor shielding layer and the insulation shielding layer is 0.05-0.08 mm, the surface impedance is less than or equal to 0.07 omega/inch 2, and the vertical impedance is less than or equal to 0.05 omega.
Preferably, the metal shielding layer is braided by using tinned copper wires, and the braiding density is not lower than 90%.
Preferably, the wrapping tape is wrapped by adopting a foamed polytetrafluoroethylene tape, the overlapping position of the tape is not less than 30%, the tensile strength is greater than or equal to 8Mpa, the elongation at break is greater than or equal to 100%, the electrical strength is greater than or equal to 10MV/M, and the electrical conductivity is 1.0 multiplied by 10-12S/M.
Preferably, high-temperature-resistant filling is arranged in a gap between the wrapping tape and the wrapping cable core, four groups of compression-resistant reinforcing cores are uniformly distributed on the outer side between the metal shielding layers along the circumference, and the compression-resistant reinforcing cores are arranged at the central position of the high-temperature-resistant filling between the metal shielding layers.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses the surface of cable has adopted the high temperature flame ablation that the pottery fire-resistant silicon rubber that low temperature burns till can be able to bear or endure 1200 ℃ -1500 ℃ after porcelainization, and form under the condition of meeting water pouring and do not break hard solid-like continuation burning that can completely cut off or block flame, the cooperation has wrapped up the insulating layer in addition, and high pressure resistant packing, thereby reach the insulating layer softening (crosslinked polyethylene does not melt) of insulating sinle silk, under the condition of conflagration, guarantee that the cable can normally work (cable core does not exceed 300 ℃) in the 90min of regulation, thereby can guarantee the fire resistance of cable, the insulating layer adopts crosslinked polyethylene, this material not only can play insulating effect, and has very excellent heat resistance, long-term operating temperature can reach 90 ℃, can not decompose and carbonization below 300 ℃, thereby guarantee the insulating effect of cable.
2. The utility model discloses a conductor adopts the concentric syntropy stranded synthetic conductor of stranded bare copper line or tinned wire, and the insulating core that softens under the cooperation high temperature for the compliance of whole cable is better, is applicable to more occasions, and the oxygen that separates that sets up in addition cools down the layer, makes the oxygen in the air can not permeate the cable insulation layer, does not produce oxidative decomposition's effect, slows down the ageing speed of cable.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
figure 3 is the utility model discloses a cable core structure schematic diagram.
In the figure: 1. a conductor; 2. a conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. a metal shielding layer; 6. wrapping a tape; 7. a thermal insulation layer; 8. an oxygen-insulating cooling layer; 9. an outer sheath; 10. a belt; 11. high temperature resistant filling; 12. a compression-resistant reinforcing core; 13. and a cable core.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or 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.
Referring to fig. 1-3, the present invention provides an embodiment: a middle-high voltage ceramic fire-resistant silicon rubber cable comprises a conductor 1; the outer surface of a conductor 1 is wrapped with a conductor shielding layer 2, an insulating layer 3 is extruded out of the outer surface of the conductor shielding layer 2, the insulating layer 3 is made of cross-linked polyethylene, the insulating layer 3 is wrapped with an insulating shielding layer 4, a metal shielding layer 5 is woven outside the insulating shielding layer 4, the four metal shielding layers 5 form a cable core 13, the outer surface of the cable core 13 is wrapped with a wrapping tape 6, the wrapping tape 6 is wrapped with a heat insulation layer 7, the outer surface of the heat insulation layer 7 is provided with an oxygen-insulating and temperature-reducing layer 8, the oxygen-insulating and temperature-reducing layer 8 is wrapped with an outer sheath 9, the oxygen-insulating and temperature-reducing layer 8 is made of low-smoke halogen-free material, the outer sheath 9 is made of ceramic silicon rubber, and the outer surface of the outer sheath 9 is provided with binding bands 10 at equal intervals;
the heat insulation layer 7 is formed by wrapping ceramic fiber paper, and the overlapping position of the heat insulation layer is not less than 50%;
specifically, the conductor 1 can ensure normal power transmission, the insulating layer 3 made of cross-linked polyethylene has very excellent heat resistance, the long-term working temperature can reach 90 ℃, decomposition and carbonization can not occur below 300 ℃, the insulating shielding layer 4 can play a role in insulating protection, the low-smoke halogen-free material oxygen-insulating and temperature-reducing layer 8 is used for absorbing a large amount of heat in the surrounding air when hydroxide is combusted, and the reaction is an endothermic reaction; the generated water molecules also need to absorb a large amount of heat in the evaporation process, so that the temperature of a combustion site is reduced; therefore, the oxygen insulation and cooling layer adopts a heat absorption and heat insulation method to conduct oxygen insulation and cooling, the heat insulation layer 7 is wrapped by ceramic fiber paper, the heat insulation effect is particularly excellent, the temperature of 300 ℃ and below in the heat insulation layer can be guaranteed at 750 ℃ outside the heat insulation layer, external heat is not easily conducted to the insulation wire core of the cable, the insulation wire core of the protected cable normally works, the outer sheath 9 made of ceramic silicon rubber can resist high-temperature flame ablation at 1200-1500 ℃, the outer sheath can form a solid state without cracking and hard under the condition of pouring in water, flame can be isolated or blocked from continuing burning, the belt 10 can tighten the wrapped outer sheath 9, and the loose condition caused by long-time use is avoided.
Further, the conductor 1 is formed by concentrically and equidirectionally twisting a plurality of strands of bare copper wires or tinned copper wires, and the pitches of the inner layer and the outer layer are consistent;
specifically, the conductor 1 formed by concentrically and equidirectionally twisting a plurality of strands of bare copper wires or tinned copper wires has better flexibility, and the power transmission efficiency of the conductor 1 can be ensured if the pitches of the inner layer and the outer layer are consistent.
Further, the conductor shielding layer 2 is wrapped by carbon-plated conductive cloth, the overlapping part of the conductor shielding layer 2 is not less than 15%, the insulation shielding layer 4 is wrapped by carbon-plated conductive cloth, the overlapping part of the conductor shielding layer 2 and the insulation shielding layer 4 is not less than 20%, the thickness of the carbon-plated conductive cloth of the conductor shielding layer 2 and the insulation shielding layer 4 is 0.05-0.08 mm, the surface impedance is less than or equal to 0.07 omega/inch 2, and the vertical impedance is less than or equal to 0.05 omega;
specifically, the shielding effect of conductor 1 can be guaranteed to the conductor shielding layer 2 of carbon-plated conductive cloth material, and the naked condition can be avoided appearing in conductor 1 in not less than 15% overlapping, adopts carbon-plated conductive cloth to play insulation protection's effect around the insulation shielding layer 4 of package can cooperate conductor shielding layer 2.
Further, the metal shielding layer 5 is woven by tinned copper wires, and the weaving density is not lower than 90%;
specifically, the metal shielding layer 5 which is formed by weaving tinned copper wires and has weaving density not lower than 90% can ensure the safety of the cable during power transmission, can play a role in shielding external voltage, and avoids the influence of the external voltage on the power transmission of the cable.
Further, the wrapping tape 6 is wrapped by adopting a foaming polytetrafluoroethylene tape, the overlapping position is not less than 30%, the tensile strength is more than or equal to 8Mpa, the elongation at break is more than or equal to 100%, the electrical strength is more than or equal to 10MV/M, and the electrical conductivity is 1.0 multiplied by 10 to 12S/M;
specifically, adopt the insulating effect of the increase cable that the band 6 of wrapping of foaming polytetrafluoroethylene area around package can be further, and can increase the pull resistance of cable.
Furthermore, high-temperature resistant filling 11 is arranged in a gap between the wrapping tape 6 and the wrapping cable core 13, four groups of compression-resistant reinforcing cores 12 are uniformly distributed on the outer side between the metal shielding layers 5 along the circumference, and the compression-resistant reinforcing cores 12 are arranged in the center of the high-temperature resistant filling 11 between the metal shielding layers 5;
specifically, the high-temperature-resistant filler 11 can achieve the effects of high-temperature resistance and heat insulation, and the compression-resistant reinforcing core 12 can increase the compression resistance of the cable.
The working principle is as follows: by the concentric syntropy stranded synthetic conductor 1 transmission of electricity of stranded bare copper line or tinned wire in the use, when transmission of electricity in-process ambient temperature was too high, oversheath 9 through adopting ceramic silicon rubber material carries out outmost thermal-insulated protection, and form under the condition of meeting water pouring and do not break hard solid state and can completely cut off or block the continuation burning of flame, band 10 can tighten oversheath 9 around the package, avoid long-time the use to take place loose condition, then loop through the insulating layer 3 that adopts crosslinked polyethylene and insulate against heat, adopt low smoke halogen-free material to separate oxygen cooling layer 8 and high temperature resistant packing 11 and carry out thermal-insulated protection, insulating shield 4 can play insulating protection's effect.
The details of the present invention are not described in detail, but are well known to those skilled in the art.
Finally, it is to be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified and replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (7)
1. A middle-high voltage ceramic fire-resistant silicon rubber cable comprises a conductor (1); the method is characterized in that: the outer surface of the conductor (1) is wrapped with a conductor shielding layer (2), an insulating layer (3) is extruded out of the outer surface of the conductor shielding layer (2), the insulating layer (3) is made of cross-linked polyethylene, the insulating layer (3) is wrapped by an insulating shielding layer (4), a metal shielding layer (5) is braided outside the insulation shielding layer (4), the four metal shielding layers (5) form a cable core (13), the outer surface of the cable core (13) is wrapped with a wrapping tape (6), the wrapping tape (6) is wrapped with a heat insulation layer (7), the outer surface of the heat insulation layer (7) is provided with an oxygen insulation and temperature reduction layer (8), the oxygen insulation and temperature reduction layer (8) is wrapped by an outer sheath (9), the oxygen insulation and temperature reduction layer (8) is made of low-smoke halogen-free materials, the outer sheath (9) is made of ceramic silicon rubber, and belts (10) are arranged on the outer surface of the outer sheath (9) at equal intervals;
the heat insulation layer (7) is formed by wrapping ceramic fiber paper, and the overlapping position of the heat insulation layer is not less than 50%.
2. The medium-high voltage ceramic fire-resistant silicone rubber cable according to claim 1, characterized in that: the conductor (1) is formed by concentrically and equidirectionally twisting a plurality of strands of bare copper wires or tinned copper wires, and the pitches of the inner layer and the outer layer are consistent.
3. The medium-high voltage ceramic fire-resistant silicone rubber cable according to claim 1, characterized in that: the conductor shielding layer (2) is wrapped by carbon-plated conductive cloth, and the overlapping position of the conductor shielding layer is not less than 15%.
4. The medium-high voltage ceramic fire-resistant silicone rubber cable according to claim 1, wherein: the insulation shielding layer (4) is wrapped by carbon-plated conductive cloth, the carbon-plated conductive cloth is overlapped by not less than 20%, the thickness of the carbon-plated conductive cloth of the conductor shielding layer (2) and the insulation shielding layer (4) is 0.05-0.08 mm, the surface impedance is less than or equal to 0.07 omega/inch 2, and the vertical impedance is less than or equal to 0.05 omega.
5. The medium-high voltage ceramic fire-resistant silicone rubber cable according to claim 1, characterized in that: the metal shielding layer (5) is braided by adopting tinned copper wires, and the braiding density is not lower than 90%.
6. The medium-high voltage ceramic fire-resistant silicone rubber cable according to claim 1, wherein: the wrapping tape (6) is wrapped by adopting a foaming polytetrafluoroethylene tape, the overlapping position of the tape is not less than 30%, the tensile strength is more than or equal to 8Mpa, the elongation at break is more than or equal to 100%, the electrical strength is more than or equal to 10MV/M, and the electrical conductivity is 1.0 multiplied by 10 to 12S/M.
7. The medium-high voltage ceramic fire-resistant silicone rubber cable according to claim 1, characterized in that: be equipped with high temperature resistant packing (11) in the clearance around band (6) around package cable core (13), outside along circumference evenly distributed between metal shielding layer (5) has four group's resistance to compression to strengthen core (12), and the central point department of high temperature resistant packing (11) between metal shielding layer (5) is equipped with resistance to compression and strengthens core (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123256552.3U CN217061496U (en) | 2021-12-23 | 2021-12-23 | Middle-high voltage ceramic fire-resistant silicone rubber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123256552.3U CN217061496U (en) | 2021-12-23 | 2021-12-23 | Middle-high voltage ceramic fire-resistant silicone rubber cable |
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| Publication Number | Publication Date |
|---|---|
| CN217061496U true CN217061496U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123256552.3U Active CN217061496U (en) | 2021-12-23 | 2021-12-23 | Middle-high voltage ceramic fire-resistant silicone rubber cable |
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|---|---|
| CN (1) | CN217061496U (en) |
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- 2021-12-23 CN CN202123256552.3U patent/CN217061496U/en active Active
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Denomination of utility model: A medium and high voltage ceramic fire resistant silicone rubber cable Effective date of registration: 20221115 Granted publication date: 20220726 Pledgee: Qingyang sub branch of Jiangsu Jiangyin Rural Commercial Bank Co.,Ltd. Pledgor: Jiangyin Haosheng electrical cable manufacturing Co.,Ltd. Registration number: Y2022320010684 |