CN212010495U - B1-grade cable with combustion performance grade - Google Patents
B1-grade cable with combustion performance grade Download PDFInfo
- Publication number
- CN212010495U CN212010495U CN202021138477.3U CN202021138477U CN212010495U CN 212010495 U CN212010495 U CN 212010495U CN 202021138477 U CN202021138477 U CN 202021138477U CN 212010495 U CN212010495 U CN 212010495U
- Authority
- CN
- China
- Prior art keywords
- cable
- heat
- conductor
- layer
- heat insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a B1-grade cable with combustion performance, which comprises an insulating wire core, a flame-retardant filler, a flame-retardant wrapping tape, a heat-insulating layer, a prefabricated molding strip, a heat-insulating wrapping tape and an outer sheath layer which are arranged in sequence from inside to outside; the insulating wire core comprises a conductor and an insulating layer coated on the periphery of the conductor; the plurality of prefabricated forming strips are uniformly arranged between the heat insulation layer and the heat insulation wrapping tape. This experiment is novel through setting up prefabricated forming strip, has the space between the prefabricated forming strip, and when the conflagration breaing out, the inner structure of cable can be prevented directly ablating in the space between the prefabricated forming strip, reduces the production of burning drippage, can also prevent that cable inner structure from damaging because of the high temperature inflation.
Description
Technical Field
The utility model relates to a flame retarded cable technical field, concretely relates to combustion performance grade B1 level cable.
Background
The cable is an important carrier for transmitting electric power, and a fire caused by the cable can cause serious consequences and even endanger the life safety of people. The cable is classified into a common cable, a flame-retardant cable and a fire-resistant cable according to the grade of combustion performance.
The cable with the combustion performance grade of B1 belongs to a flame-retardant cable, and the cable with the combustion performance grade of B1 is mainly used in places with dense population such as subways, airports, markets, hospitals, kindergartens, high-rise buildings and the like in an engineering construction fireproof system and places needing special protection. In the fire-proof regulations of engineering construction in these places, cables with higher flame-retardant level are required to be adopted.
The applicant finds that the existing cable has the following disadvantages:
1. in case of fire, the existing cable meeting the combustion performance B1 grade releases heat outwards during combustion and generates combustion drops, thereby igniting combustible substances near the cable and further intensifying the fire.
2. When a fire disaster happens, the inside of the cable of the existing cable which accords with the combustion performance grade B1 is heated and expanded, the insulation of the cable can be damaged from the inside by the expanded internal pressure, and the cable with the damaged insulation has the risk of electric leakage.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical defect, the utility model provides a burning performance grade B1 cable that the outside release heat is little during the burning, does not produce the burning drippage and can prevent to damage because of inside inflation
In order to solve the above problem, the utility model discloses realize according to following technical scheme:
the utility model relates to a B1 grade cable with combustion performance, which is characterized by comprising an insulating wire core, a flame-retardant filler, a flame-retardant wrapping tape, a heat-insulating layer, a prefabricated molding strip, a heat-insulating wrapping tape and an outer sheath layer which are arranged from inside to outside in sequence;
the insulating wire core comprises a conductor and an insulating layer coated on the periphery of the conductor;
the plurality of prefabricated forming strips are uniformly arranged between the heat insulation layer and the heat insulation wrapping tape.
Preferably, the conductor is a solid conductor structure.
Preferably, the conductor is a stranded conductor structure.
Preferably, the insulating layer is made of a cross-linked polyethylene material.
Preferably, the thermal barrier layer is made of a ceramicized polyolefin material.
Preferably, the thermal insulation layer is made of a ceramic silicone rubber material.
Preferably, the preformed shaped strip is made of one of a ceramicized polyolefin material or a ceramicized silicone rubber strip.
Preferably, the heat-insulating wrapping tape is a ceramic silicon rubber wrapping tape.
Preferably, the outer sheath layer is made of a low smoke zero halogen polyolefin material.
Compared with the prior art, the beneficial effects of the utility model are that:
burning performance grade B1 level cable, it is through insulating layer, prefabricated shaping strip, thermal-insulated band and oversheath layer structure of mutually supporting for fire-retardant thermal-insulated effectual. The prefabricated forming strip sets up between insulating layer and thermal-insulated band, and a plurality of prefabricated forming strip evenly distributed have the space between the prefabricated forming strip, and when the insulating layer was heated the inflation, the space between the prefabricated forming strip can bear the insulating layer inflation, prevents that the cable from damaging because of inside inflation. The heat-insulating layer, the prefabricated molding strip and the heat-insulating wrapping tape are quickly hardened and crusted at high temperature, do not generate burning drips and have low heat productivity.
Drawings
The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a cable with a combustion performance grade of B1 of the present invention;
in the figure:
1-an insulated wire core, 11-a conductor, 12-an insulating layer;
2-flame retardant filler;
3-flame-retardant wrapping tape;
4-a heat insulation layer;
5-prefabricating a molding strip;
6-heat insulation wrapping tape;
7-outer sheath layer.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1, the preferred structure of the cable with the combustion performance grade of B1 is disclosed in the present invention.
Burning performance grade B1 level cable, it includes insulating core 1, fire-retardant stopping 2, fire-retardant band 3, insulating layer 4, prefabricated shaping strip 5, thermal-insulated band 6 and oversheath layer 7 that set gradually from inside to outside.
The insulated wire core 1 can keep insulation and continuously transmit power, is the most main power carrier in the cable, and the key for maintaining the stability of power transmission is to keep the insulation. The flame-retardant filler 2 is used for filling the cable, so that the overall roundness of the cable is kept, and the flame retardant property of the cable is improved. The flame-retardant wrapping tape 3 is used for preventing the cable from burning, thereby protecting the insulation of the cable. The heat insulation layer 4 is used for blocking heat transmission, can prevent heat outside the cable from being transmitted to the inside of the cable to enable the cable to burn when a fire disaster happens, and can block the heat inside the cable from being released outwards to cause the fire disaster. The preformed profile strip 5 provides a gap in the cable for thermal insulation and to prevent internal expansion from damaging the cable. The insulating tape 6 is used for further insulation. The outer jacket layer 7 protects the cable at its outermost layer.
The insulated wire core 1 comprises a conductor 11 and an insulating layer 12, and the insulating layer 12 is coated on the periphery of the conductor 11. The insulated wire cores 1 are arranged at the axis position of the cable, and the insulated wire cores 1 are mutually twisted to form the cable. In this embodiment, a structure in which five insulated wire cores 1 are twisted by a cabling machine is adopted, the five insulated wire cores 1 work simultaneously to improve the power transmission performance of the cable, the flame retardant filler 2 is filled in the centers of the five insulated wire cores 1, and the overall periphery of the twisted five insulated wire cores 1 is circular.
The conductor 11 is formed by drawing an oxygen-free copper rod, in the embodiment, preferably, the conductor structure is a solid conductor structure, a drawn solid oxygen-free copper wire is directly used as the conductor 11, and the solid conductor structure conforms to a first conductor structure specified in GB/T3956-2008.
As another embodiment, the conductor 11 is a stranded conductor structure, an oxygen-free copper rod is drawn to form copper wires, a plurality of copper wires are stranded with each other to form a stranded conductor structure, and the stranded conductor structure conforms to the second conductor structure specified in GB/T3956-2008.
The insulating layer 12 is tightly wrapped on the periphery of the conductor 11, and the insulating layer 12 is made of a cross-linked polyethylene material. The performance of the polyethylene material modified by crosslinking is greatly improved, the comprehensive performances such as mechanical property, environmental stress cracking resistance, corrosion resistance, creep resistance, electrical property and the like are obviously improved, and the heat resistance is obviously improved. The crosslinked polyethylene insulating material is suitable for the insulating layer 12 of the cable, so that the insulation of the cable is stably and permanently maintained.
Fire-retardant band 3 sets up in the periphery of insulated wire core 1, and fire-retardant band 3 winds the package shaping in the periphery of insulated wire core 1, plays fixed insulated wire core 1 and keeps the effect of cable roundness simultaneously.
The flame-retardant filler 2 is arranged between the insulated wire cores 1 and the flame-retardant wrapping tape 3. In a preferred embodiment, the material of the flame-retardant filler 2 is an inorganic paper rope. By filling the inorganic paper rope between the insulating wire core 1 and the flame-retardant wrapping tape 3, the whole control cable can be ensured to have better roundness. The inorganic paper rope has high flame retardance, and the flame retardance grade of the cable can be improved. On the other hand, the position of the insulated wire core 1 in the cable is relatively stable by filling the flame-retardant filling material 2, and the overall tensile strength of the cable can be increased, so that the structure of the cable is more stable and reliable.
The heat insulation layer 4 is extruded by an extruder, and is coated on the periphery of the flame-retardant wrapping belt 3 and molded. The heat insulation layer 4 is made of ceramic polyolefin material, the ceramic polyolefin material is a material formed by mixing, plasticizing and granulating high-efficiency ceramic filler, flame retardant and other functional additives added into polyolefin resin serving as a base material, a ceramic-shaped shell formed by the ceramic polyolefin material is not easy to crack and does not generate combustion drips, and the ceramic-shaped shell has excellent electrical isolation performance and heat insulation performance, can effectively isolate ablation of external flame to the inside of the cable, and avoids the insulating layer 12 from being damaged and the conductor 11 from being fused in the flame, thereby ensuring that the normal power transmission of the cable is kept under the condition of fire.
The prefabricated forming strip 5 is arranged between the heat insulation layer 4 and the heat insulation wrapping tape 6. The prefabricated forming strips 5 are of strip structures, and the plurality of prefabricated forming strips 5 are uniformly wound on the outer surface of the heat insulation layer 4, so that the heat insulation layer 4 is not in direct contact with the heat insulation wrapping belts 6. Meanwhile, gaps exist among the plurality of uniformly distributed prefabricated forming strips 5, and the gaps play roles in heat insulation and reducing burning drops.
On the other hand, when a fire disaster happens, the gaps between the prefabricated molding strips 5 can prevent the burning heat insulation wrapping tape 6 from directly ablating the heat insulation layer 4, so that the burning inside the cable is blocked, and burning drips when the cable is burnt are reduced. The heat insulating layer 4 may expand due to high temperature in a fire, and the gaps between the prefabricated molding strips 5 can bear the expansion of the heat insulating layer 4, so that the heat insulating layer 4 is prevented from expanding to damage the cable structure, and the cable is further protected in the fire, and normal power transmission of the cable is maintained.
The number of the prefabricated forming strips 5 is 12 in the embodiment, and the 12 prefabricated forming strips 5 are equidistantly wound on the periphery of the heat insulation layer 4.
As one embodiment, the preformed molding strip 5 is made of a ceramic polyolefin material. The ceramic polyolefin is a material which is prepared by taking polyolefin resin as a base material, adding high-efficiency ceramic-forming filler, flame retardant and other functional auxiliaries, and then mixing, plasticizing and granulating. By adopting the ceramic polyolefin material, the manufacturing process of the cable is greatly simplified, the production efficiency is improved, and the production cost can be reduced. Meanwhile, the ceramic polyolefin material is not easy to crack and does not generate burning drops when burning, so that the generation of the burning drops when the cable burns is reduced, and the burning drops are prevented from igniting combustible substances around the cable to intensify the fire.
As another embodiment, the prefabricated molding strip 5 is made of a ceramic silicone rubber strip, the ceramic silicone rubber strip has excellent characteristics of fire resistance, flame retardance, low smoke and no toxicity, the extrusion molding process is simple, residues after combustion are hard ceramic shells, the ceramic shells are not melted and do not drip in a fire environment, and the prefabricated molding strip 5 is suitable for manufacturing and can ensure that a cable can normally work under the condition of fire. The processing technology of the ceramic silicone rubber strip is simple, the production can be realized by adopting the traditional silicone rubber processing equipment, the production efficiency is high, the production energy consumption is reduced, and the production cost is saved.
Thermal-insulated band 6 wraps in the periphery of prefabricating forming strip 5, for ceramic silicon rubber area, and thermal-insulated band 6 has fire-retardant, fire prevention, thermal-insulated and ageing resistance, and the use of thermal-insulated band 6 does not influence the cable current-carrying capacity in the cable operation, and when the conflagration took place, thermal-insulated band 6 can form the thermal-insulated carbide layer of oxygen-resistant rapidly to effectively insulate against heat, and prevent the burning of cable.
The outer sheath layer 7 is arranged on the periphery of the heat insulation wrapping tape 6, and in the embodiment, preferably, the outer sheath layer 7 is made of low-smoke halogen-free polyolefin materials through extrusion by an extruder. When a fire disaster happens, the outer sheath layer 7 is positioned on the outermost layer of the cable, and when the outer sheath layer 7 burns, because the low-smoke halogen-free polyolefin material does not contain halogen and the smoke released when the outer sheath layer 7 burns is less, the safety of a user is protected.
In conclusion, the cable structure enables the cable to meet the requirement of the combustion performance grade B1.
The theory of operation of burning performance grade B1 level cable be:
combustion performance level B1 level cable, its insulating layer 4 is made by ceramic polyolefin material, prefabricated shaping strip 5 is made by ceramic polyolefin or ceramic silicone rubber strip, thermal-insulated band 6 is ceramic silicone rubber area, prefabricated shaping strip 5 sets up between insulating layer 4 and thermal-insulated band 6, a plurality of prefabricated shaping strip 5 evenly distributed have the space between prefabricated shaping strip 5, reduce the contact of outside flame and cable inner structure. The gap can also bear the expansion of the heat insulation layer 4, and the heat insulation layer 4 is prevented from damaging the cable structure due to thermal expansion. The outer sheath layer 7 is made of low-smoke halogen-free polyolefin, and the overall flame-retardant and heat-insulating effect of the cable is excellent through the mutual matching of the heat-insulating layer 4, the prefabricated molding strip 5, the heat-insulating wrapping tape 6 and the outer sheath layer 7, so that the cable can maintain normal power transmission in a fire disaster.
In addition, the heat insulation layer 4, the prefabricated molding strip 5 and the heat insulation bag 6 are made of ceramic materials, can be rapidly hardened and crusted under the action of high temperature, do not drip, and have good low smoke performance and low heat productivity. The outer sheath layer 7 is made of low-smoke halogen-free polyolefin material with good crusting performance and low heat productivity, and can reduce the burning dripping property and heat release of the material.
Other constructions of the cable of class B1 for flammability performance as described in this example are known in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.
Claims (9)
1. A cable with a combustion performance grade of B1 is characterized by comprising an insulating wire core (1), a flame-retardant filler (2), a flame-retardant wrapping tape (3), a heat-insulating layer (4), a prefabricated molding strip (5), a heat-insulating wrapping tape (6) and an outer sheath layer (7) which are sequentially arranged from inside to outside;
the insulation wire core (1) comprises a conductor (11) and an insulation layer (12) coated on the periphery of the conductor (11);
the prefabricated forming strips (5) are uniformly arranged between the heat insulation layer (4) and the heat insulation wrapping belt (6).
2. The cable of claim 1, having a flammability class B1, wherein:
the conductor (11) is of a solid conductor structure.
3. The cable of claim 1, having a flammability class B1, wherein:
the conductor (11) is of a stranded conductor structure.
4. The cable of claim 2 or 3, having a flammability class B1, wherein:
the insulating layer (12) is made of a cross-linked polyethylene material.
5. The cable of claim 2 or 3, having a flammability class B1, wherein:
the heat insulation layer (4) is made of ceramic polyolefin material.
6. The cable of any one of claims 1 to 3, having a flammability class B1, wherein:
the heat insulation layer (4) is made of ceramic silicon rubber materials.
7. The cable of any one of claims 1 to 3, having a flammability class B1, wherein:
the prefabricated forming strip (5) is made of one of ceramic polyolefin material or ceramic silicon rubber strip.
8. The cable of any one of claims 1 to 3, having a flammability class B1, wherein:
the heat insulation wrapping tape (6) is a ceramic silicon rubber wrapping tape.
9. The cable of any one of claims 1 to 3, having a flammability class B1, wherein:
the outer sheath layer (7) is made of low-smoke halogen-free polyolefin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021138477.3U CN212010495U (en) | 2020-06-18 | 2020-06-18 | B1-grade cable with combustion performance grade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021138477.3U CN212010495U (en) | 2020-06-18 | 2020-06-18 | B1-grade cable with combustion performance grade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212010495U true CN212010495U (en) | 2020-11-24 |
Family
ID=73403188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021138477.3U Active CN212010495U (en) | 2020-06-18 | 2020-06-18 | B1-grade cable with combustion performance grade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212010495U (en) |
-
2020
- 2020-06-18 CN CN202021138477.3U patent/CN212010495U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215007651U (en) | Mineral-filled flame-retardant fireproof isolated special cable for modern buildings | |
| CN111210939B (en) | Polyvinyl chloride insulation fire-resistant power cable | |
| CN209843344U (en) | Fireproof flame-retardant cable | |
| CN112164510A (en) | High-flame-retardant new energy automobile cable | |
| CN212010495U (en) | B1-grade cable with combustion performance grade | |
| CN115171968B (en) | High-efficiency energy-saving medium-voltage fireproof cable | |
| CN217280178U (en) | Medium-voltage fire-resistant cable | |
| CN210896727U (en) | Mineral insulation fireproof cable | |
| CN113851264A (en) | Novel fire prevention low smoke and zero halogen cable | |
| CN205487500U (en) | 10KV fireproof cable | |
| CN209843282U (en) | Ceramic flame-retardant optical cable | |
| CN109524157B (en) | Soft mineral fireproof cable | |
| CN211828238U (en) | Fireproof medium-voltage cable | |
| CN220381826U (en) | Flame-retardant wire and cable capable of preventing dripping during combustion | |
| CN211828174U (en) | High-temperature-resistant and durable fireproof cable | |
| CN110634608A (en) | Fire-fighting flame-retardant B1-grade wire and cable and manufacturing method thereof | |
| CN205451889U (en) | Pottery insulated cable | |
| CN220020694U (en) | Flexible protective layer fireproof cable | |
| CN213123910U (en) | High flame-retardant fireproof cable | |
| CN218631426U (en) | Ceramic insulation flexible fireproof cable | |
| CN217485137U (en) | Double-layer co-extrusion convenient home decoration electric wire with long service life | |
| CN213339723U (en) | High-strength super-flexible fireproof cable | |
| CN211507199U (en) | Insulating flame-retardant cable wire | |
| CN211529639U (en) | Mineral insulation corrugated copper sheath cable | |
| CN217134061U (en) | Fire-resistant flame retarded cable of crosslinked polyethylene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |