CN217788064U - Medium-voltage fireproof cable - Google Patents
Medium-voltage fireproof cable Download PDFInfo
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- CN217788064U CN217788064U CN202122572445.5U CN202122572445U CN217788064U CN 217788064 U CN217788064 U CN 217788064U CN 202122572445 U CN202122572445 U CN 202122572445U CN 217788064 U CN217788064 U CN 217788064U
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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 fireproof cable, including electrically conductive heart yearn, electrically conductive heart yearn is by three transposition stranding, the outside parcel of electrically conductive heart yearn has the first oxygen layer that separates, the first outside parcel that separates the oxygen layer has first flame retardant coating, the first flame retardant coating of outside parcel of first flame retardant coating, the outside parcel of first flame retardant coating has the second to separate the oxygen layer, the second separates the outside on oxygen layer and encircles and be provided with eight plastics abrupt ridges, plastics abrupt ridge link up with the second flame retardant coating, the outside parcel second flame retardant coating of second flame retardant coating. This middling pressure fireproof cable compares with current conventional middling pressure cable, adopts the no halogen low smoke polyolefin to separate the oxygen layer, has good water blocking effect, gives middling pressure cable excellent radial water blocking performance, and simultaneously, the compound cable core is 3 cables stranding that block water, and further prevention moisture is to the harm of cable, but the guarantee middling pressure cable normal operating for a long time under outdoor or humid environment.
Description
Technical Field
The utility model relates to a middling pressure cable technical field specifically is a middling pressure fireproof cable.
Background
At present, the mineral insulation fireproof cable for the low-voltage line is more and more in demand, people recognize the importance of safety, so that the medium-voltage cable with good fireproof and fireproof performances is gradually used in medium-voltage distribution systems of important occasions such as high-rise buildings, hospitals, stations, subways, airports and the like, and the requirement of normal power supply under fire disasters is met.
The laying environment of the medium-voltage cable is complex, particularly for a wet laying environment, the conventional medium-voltage cable product has the defects that water resistance is poor, water permeates into the cable after long-time use, the electrical performance is influenced, the use efficiency of the cable is also seriously reduced, even line faults and other problems occur, the safety of the cable is problematic, the frequent cable faults in special occasions are easily caused, and huge economic loss is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a middling pressure fireproof cable to solve the problem that proposes current conventional middling pressure cable product existence among the above-mentioned background art.
In order to realize the above-mentioned purpose, the utility model provides a middling pressure fireproof cable, including electrically conductive heart yearn, electrically conductive heart yearn is by three transposition stranding, the outside parcel of electrically conductive heart yearn has the first oxygen layer that separates, the first outside parcel that separates the oxygen layer has first flame retardant coating, the first flame retardant coating of outside parcel of first flame retardant coating, the outside parcel of first flame retardant coating has the second to separate the oxygen layer, the second separates the outside on oxygen layer and encircles and be provided with eight plastics abrupt ridges, plastics abrupt ridges link up with the second flame retardant coating, the outside parcel metal second flame retardant coating of second flame retardant coating, the outside parcel of second flame retardant coating has the oversheath, electrically conductive core solenoid contains the electric conductor.
Preferably, the conductor is wrapped by a conductor shielding layer, the insulation layer is wrapped by the insulation layer, the semiconductive water-blocking layer is wrapped by the insulation layer, the metal shielding layer is wrapped by the semiconductive water-blocking layer, the conductor shielding layer is formed by extruding and wrapping a crosslinked polyolefin insulation cable conductor by using a peroxide crosslinking semiconductive shielding material, the insulation layer is formed by extruding and wrapping a crosslinked polyolefin insulation cable by using a peroxide crosslinking polyolefin insulation material, the insulation shielding layer is formed by extruding and wrapping a crosslinked polyolefin insulation cable insulation by using a peroxide crosslinking semiconductive shielding material, the conductor shielding layer, the insulation layer and the insulation shielding layer are formed by three-layer co-extrusion by using dry crosslinking production equipment, the thickness of the conductor shielding layer meets the corresponding voltage grade requirement of the GB/T12706 standard, the metal shielding layer is formed by overlapping and wrapping a soft copper tape on the insulation shielding layer, the metal shielding layer is a soft copper tape with the thickness of 0.12mm, the conductor shielding layer meets the standard requirement of the GB/T12706, the conductor is formed by twisting a plurality of high-quality special-shaped copper single wires, the special-shaped copper wires are adopted, the gap between the special-shaped copper single wires is furthest reduced, the compact coefficient, the appearance and the external diameter of the conductor is improved, and the conductor is reduced.
Preferably, the first oxygen barrier layer is filled between the conductive core wires by adopting a halogen-free low-smoke flame-retardant filling material, and the first fireproof layer is a mixture material layer of magnesium hydroxide and sodium silicate. The first fire-resistant layer is made by overlapping and wrapping high-quality double-sided film synthetic mica tapes and ceramic mica tapes, has good flame-retardant and fire-resistant effects, is extruded on the first oxygen isolation layer by a grouting technology, can absorb heat and be ceramic when meeting high temperature of the second fire-resistant layer, has excellent heat insulation, insulation and fire resistance, can reduce the temperature inside the first fire-resistant layer by about 200 ℃ again, and further slows down the temperature rise speed of the conductive core wire.
Preferably, the first fire-resistant layer is made of a double-sided film synthetic mica tape and a ceramic mica tape, a plastic ridge structure is arranged between the second oxygen isolation layer and the second fire-resistant layer, and the plastic ridge is made of 6-8 nylon rods through a sparse winding process, so that the second fire-resistant layer is fixed between the oxygen isolation layer and the plastic ridge, and the second fire-resistant layer can be effectively prevented from deforming and rounding due to self weight.
Preferably, the second flame retardant coating adopts magnesium hydrate and sodium silicate mixture layer, and the second flame retardant coating passes through grouting technique, crowded package on the second separates the oxygen layer, can form the ceramic flame retardant coating the very first time when receiving outside high temperature, has good heat-proof quality, can restrain insulating heart yearn temperature under the flame condition and rise fast, can make the inside temperature of second flame retardant coating reduce about 200 ℃ in the earlier stage of the conflagration, prevent the destruction of conflagration to medium voltage cable, guarantee that second flame retardant coating inner structure is complete effective, material cost is low, fire behavior is good, increase the life and the security performance of cable.
Preferably, the second flame retardant coating adopts synthetic mica tape of two-sided film and ceramic mica tape to overlap around the package between outer sheath and second flame retardant coating, the oversheath is resistant to weather type protection against rodents ant halogen-free low smoke flame retardant B1 level polyolefin material layer, and the second flame retardant coating not only plays fire-resistant effect, still plays the effect of fixed second flame retardant coating simultaneously, and the polyolefin material of oversheath weatherability has low viscidity simultaneously, does not contain halogen, and especially stand wear and tear and excellent waterproof nature, weather-resistant ageing grade characteristics such as, makes whole cable reach B1 level burning standard in the GB 31247-2014 standard, has improved the life of product greatly.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this middling pressure fireproof cable compares with current conventional middling pressure cable, adopts the no halogen low smoke polyolefin to separate the oxygen layer, has good water blocking effect, gives middling pressure cable excellent radial water blocking performance, and simultaneously, the compound cable core is 3 cables stranding that block water, and further prevention moisture is to the harm of cable, but the guarantee middling pressure cable normal operating for a long time under outdoor or humid environment.
2. This middling pressure fireproof cable has not only improved the coefficient of sticising of conductor, when guaranteeing the cable current-carrying capacity moreover, has reduced the cable external diameter, has obviously reduced the cost of whole cable, has good fire-retardant fire-resistant fire prevention effect, has improved the security and the reliability of cable operation, also increases the life of cable, and on the other hand, the existence of first, second oxygen barrier also gives the dual radial water blocking performance of cable.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the dissecting three-dimensional structure of the present invention;
fig. 3 is a schematic cross-sectional structure view of the fireproof medium-voltage cable of the present invention;
fig. 4 is a schematic cross-sectional structure view of the electric conductor of the present invention.
In the figure: 1. a conductive core wire; 101. an electrical conductor; 102. a conductor shield layer; 103. an insulating layer; 104. an insulating shield layer; 105. a semi-conductive water blocking layer; 106. a metal shielding layer; 2. a first oxygen barrier layer; 3. a first fire resistant layer; 4. a first refractory layer; 5. a second oxygen barrier layer; 6. a plastic ridge; 7. a second fire-resistant layer; 8. a second refractory layer; 9. an outer sheath.
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 efforts all belong to the protection scope of the present invention.
Referring to fig. 1-4, the utility model provides a medium voltage fireproof cable, including conductive core 1, electric conductor 101, conductor shielding layer 102, insulating layer 103, insulation shielding layer 104, semi-conductive water blocking layer 105, metal shielding layer 106, first oxygen barrier layer 2, first flame retardant coating 3, first flame retardant coating 4, second oxygen barrier coating 5, plastics abrupt ridge 6, second flame retardant coating 7, second flame retardant coating 8, oversheath 9.
Wherein, electrically conductive heart yearn 1 is by three transposition stranding cable, the outside parcel of electrically conductive heart yearn 1 has first oxygen layer 2 that separates, the first outside parcel that separates oxygen layer 2 has first flame retardant coating 3, the first flame retardant coating 4 of outside parcel of first flame retardant coating 3, the outside parcel of first flame retardant coating 4 has the second to separate oxygen layer 5, the second separates the outside of oxygen layer 5 around being provided with eight plastics abrupt ridges 6, plastics abrupt ridge 6 link up with second flame retardant coating 7, the fire-retardant flame retardant coating 8 of outside parcel metal second of second flame retardant coating 7, the outside parcel of second flame retardant coating 8 has oversheath 9, electrically conductive heart yearn 1 includes electric conductor 101.
Further, the outer side of the conductor 101 is wrapped with a conductor shielding layer 102, the outer side of the conductor shielding layer 102 is wrapped with an insulating layer 103, the outer side of the insulating layer 103 is wrapped with an insulating shielding layer 104, the outer side of the insulating shielding layer 104 is wrapped with a semi-conductive water-blocking layer 105, the outer side of the semi-conductive water-blocking layer 105 is wrapped with a metal shielding layer 106, the conductor shielding layer 102 is formed by extruding a cross-linked polyolefin insulated cable conductor with a peroxide cross-linked semi-conductive shielding material, the insulating layer 103 is formed by extruding a cross-linked polyolefin insulated cable with a peroxide cross-linked polyolefin insulated material, the insulating shielding layer 104 is formed by extruding a cross-linked polyolefin insulated cable with a peroxide cross-linked semi-conductive shielding material, the conductor shielding layer 102, the insulating layer 103 and the insulating shielding layer 104 are formed by three-layer co-extrusion by using dry cross-linking production equipment, the thickness of the conductor shielding layer is in accordance with the corresponding voltage level requirement of the GB/T12706 standard, the metal shielding layer 106 is a soft copper strip with the thickness of 0.12mm, the soft copper strip is overlapped on the insulating shielding layer 104, the single-wire conductor is in accordance with the standard requirement of a plurality of high-quality copper single wires, the single wire conductor is stranded copper conductor, the clearance between the single wire is reduced, the clearance of the single wire is reduced, and the single wire clearance of the single wire, and the single wire is reduced in the single wire, and the single wire clearance of the single wire is reduced in the single wire.
Further, the first oxygen layer 2 that separates adopts low smoke and zero halogen fire-retardant filler material to fill between electrically conductive heart yearn 1, and first flame retardant coating 3 adopts magnesium hydrate and sodium silicate mixture material, and first flame retardant coating 3 is on first oxygen layer 2 that separates through the closely knit crowded package of grout technique, when meetting high temperature, but the heat absorption ceramization has superior heat-proof quality, insulating properties and fire behavior, slows down electrically conductive heart yearn 1 temperature rise speed.
Further, first flame retardant coating 4 adopts high-quality two-sided film synthesis mica tape to add the ceramic mica tape and makes, when playing good fire-retardant, fire resistance, also plays the effect of fixed first flame retardant coating 3, the second separates to set up the protruding spine 6 structure of plastics between oxygen layer 5 and the second flame retardant coating 7, the protruding spine 6 of plastics adopts 6 ~ 8 nylon sticks to make through dredging the winding technology, make second flame retardant coating 7 fix and separate between oxygen layer 5 and the protruding spine 6 of plastics at the second, can prevent effectively that second flame retardant coating 7 from warping not rounding because of the dead weight.
Further, second flame retardant coating 7 adopts magnesium hydrate and sodium silicate mixture layer, second flame retardant coating 7 is through the grout technique, crowded package is on second separates oxygen layer 5, can form the ceramic flame retardant coating the very first time when receiving outside high temperature, good heat-proof quality has, can restrain insulating heart yearn temperature and rise fast under the flame condition, can make 7 inside temperatures of second flame retardant coating reduce about 200 ℃ in earlier stage of the conflagration, prevent the destruction of conflagration to medium voltage cable, guarantee that 7 inner structure of second flame retardant coating are complete effective, low material cost, fire behavior is good, increase the life and the security performance of cable.
Furthermore, the second fire-resistant layer 8 is formed by lapping and wrapping a high-quality double-sided film synthetic mica tape and a ceramic mica tape between the outer sheath 9 and the second fire-resistant layer 7 in an overlapping manner, and the outer sheath 9 is made of a weather-resistant rat-proof ant-proof halogen-free low-smoke flame-retardant B1-grade polyolefin material.
The working principle is as follows: through the compound stranding of three electrically conductive heart yearns 1, prevent the harm of moisture to the cable, adopt the halogen-free low smoke flame retardant polyolefin second to separate oxygen layer 5, have good water blocking effect, give medium voltage cable excellent radial water blocking performance, guarantee that medium voltage cable can normally operate for a long time under outdoor or humid environment, electrically conductive heart yearn 1 abnormal shape conductor structure, not only improved the coefficient of stiction of conductor, and when guaranteeing the cable current-carrying capacity, the cable external diameter has been reduced, the cost of whole cable has obviously been reduced, make it have good fire-retardant fire-resistant fire prevention effect through first separating oxygen layer 2, first flame retardant coating 3, first flame retardant coating 4, the second separates oxygen layer 5, plastics abrupt ridge 6, second flame retardant coating 7, second flame retardant coating 8, oversheath 9, the security and the reliability of cable operation have been improved, also increase the life of cable.
It should be finally noted that the above contents are only used to illustrate the technical solutions of the present invention, but not to limit the protection scope of the present invention, and the simple modification or equivalent replacement performed by the technical solutions of the present invention by those skilled in the art does not depart from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. A medium voltage fireproof cable comprises a conductive core wire (1), and is characterized in that: electrically conductive heart yearn (1) is by three transposition stranding, the outside parcel of electrically conductive heart yearn (1) has first oxygen layer (2) that separates, the first outside parcel that separates oxygen layer (2) has first flame retardant coating (3), the first flame retardant coating (4) of outside parcel of first flame retardant coating (3), the outside parcel of first flame retardant coating (4) has the second to separate oxygen layer (5), the second separates the outside of oxygen layer (5) and encircles and be provided with eight plastics abrupt ridges (6), plastics abrupt ridge (6) and second flame retardant coating (7) link up, the outside parcel second flame retardant coating (8) of second flame retardant coating (7), the outside parcel of second flame retardant coating (8) has oversheath (9), electrically conductive heart yearn (1) includes electric conductor (101).
2. A medium voltage fire cable according to claim 1, characterized in that: the outer side of the conductor (101) is wrapped with a conductor shielding layer (102), the outer side of the conductor shielding layer (102) is wrapped with an insulating layer (103), the outer side of the insulating layer (103) is wrapped with an insulating shielding layer (104), the outer side of the insulating shielding layer (104) is wrapped with a semi-conductive water-resistant layer (105), and the outer side of the semi-conductive water-resistant layer (105) is wrapped with a metal shielding layer (106).
3. A medium voltage fire cable according to claim 1, characterized in that: the first oxygen isolation layer (2) is filled between the conductive core wires (1) by adopting a low-smoke halogen-free flame-retardant filling material.
4. A medium voltage fire cable according to claim 1, characterized in that: a plastic ridge (6) structure is arranged between the second oxygen-insulating layer (5) and the second fireproof layer (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021216247141 | 2021-07-16 | ||
| CN202121624714 | 2021-07-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217788064U true CN217788064U (en) | 2022-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122572445.5U Active CN217788064U (en) | 2021-07-16 | 2021-10-26 | Medium-voltage fireproof cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217788064U (en) |
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2021
- 2021-10-26 CN CN202122572445.5U patent/CN217788064U/en active Active
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