CN214897776U - Fire-resistant polyvinyl chloride sheath flexible cable - Google Patents
Fire-resistant polyvinyl chloride sheath flexible cable Download PDFInfo
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- CN214897776U CN214897776U CN202121465269.9U CN202121465269U CN214897776U CN 214897776 U CN214897776 U CN 214897776U CN 202121465269 U CN202121465269 U CN 202121465269U CN 214897776 U CN214897776 U CN 214897776U
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Abstract
The utility model discloses a fire-resistant polyvinyl chloride sheath flexible cable, which comprises a composite cable core, a wrapping tape layer, a sheath inner layer and a fire-resistant outer layer which are arranged from inside to outside in sequence; the composite cable core comprises a plurality of cables, and each cable comprises a cable core, a ceramic silicon rubber wrapping tape layer and an insulating wear-resistant layer which are sequentially arranged from inside to outside; the fire-resistant outer layer is made of polyether-ether-ketone materials and covers the sheath inner layer in an extruding mode. The utility model discloses a set up ceramic silicon rubber band layer at each cable, combine the fire-resistant skin of polyether ether ketone material, the fire resistance is excellent.
Description
Technical Field
The utility model belongs to the technical field of wire and cable, concretely relates to fire-resistant polyvinyl chloride sheath flexible cable.
Background
The electric wire refers to a wire for transmitting electric energy. The cable is classified into a common cable, a flame-retardant cable and a fire-resistant cable according to the grade of combustion performance. GB31247-2014 is proposed by the national Ministry of public Security, Sichuan fire department, Union Standard Committee, and the combustion performance of the cable and the optical cable is graded.
The applicant researches and discovers that the existing fire-resistant cable has the following technical problems:
at present, most of cables commonly used in domestic places are common fire-resistant cables, most of the existing electric wires are fire-resistant through polyvinyl chloride, and the fire-resistant degree of the polyvinyl chloride is not ideal. Therefore, a new fire-resistant polyvinyl chloride cable is yet to be provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving foretell technical problem, provide a fire-resistant polyvinyl chloride sheath flexible cable.
In order to solve the above problem, the utility model discloses realize according to following technical scheme:
the utility model relates to a fire-resistant polyvinyl chloride sheath flexible cable, which comprises a composite cable core, a wrapping tape layer, a sheath inner layer and a fire-resistant outer layer which are arranged from inside to outside in sequence;
the composite cable core comprises a plurality of cables, and each cable comprises a cable core, a ceramic silicon rubber wrapping tape layer and an insulating wear-resistant layer which are sequentially arranged from inside to outside;
the fire-resistant outer layer is made of polyether-ether-ketone materials and covers the sheath inner layer in an extruding mode.
Preferably, the inner layer of the sheath is a polyvinyl chloride sheath material which is extruded and covered on the wrapping tape layer.
Preferably, the wrapping tape layer is formed by wrapping a ceramic silicon rubber wrapping tape on the composite cable core.
Preferably, an insulating filling layer is arranged between the composite cable core and the wrapping tape layer.
Preferably, the rim wear layer is made of a nylon material.
Preferably, the wire core is formed by drawing an oxygen-free copper rod into a copper wire and twisting the copper wire.
Preferably, the composite cable core comprises 2-5 cables.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a be provided with ceramic silicon rubber band layer on the cable, its flame retardant property is excellent, and calorific capacity is low during the burning, and the ceramic material who adopts, crusts into hard protective layer at the high temperature more than 350 ℃, and interior cellular aperture that is can play fine thermal-insulated effect, and the crust performance is good in this material heating process simultaneously, does not drip, and low smoke performance is good.
2. The fire-resistant outer layer of the utility model is wrapped by polyether ether ketone material, and covered on the inner layer of the sheath, the polyether ether ketone (PEEK) has higher melting point (334 ℃), and the continuous use temperature is 260 ℃; the use requirements of the cable under the fire-resistant and high-temperature environment are met. Meanwhile, the polyether-ether-ketone has self-extinguishing property, and can reach 94V-0 grade of UL standard even if no flame retardant is added.
3. The utility model discloses a set up ceramic silicon rubber band layer at each cable, combine the fire-resistant skin of polyether ether ketone material, the fire resistance is excellent.
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 cross-sectional view of a fire-resistant pvc sheathed flexible cable of the present invention;
fig. 2 is a cross-sectional schematic view of a cable of the present invention;
in the figure:
10-cable, 11-cable core, 12-ceramic silicon rubber belting layer and 13-insulating wear-resistant layer;
20-insulating filling layer;
30-wrapping a wrapping tape layer;
40-inner layer of jacket;
50-refractory outer 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. 1-2, the present invention relates to a preferable structure of a fire-resistant flexible cable with a polyvinyl chloride sheath.
As shown in fig. 1, the fire-resistant polyvinyl chloride sheathed flexible cable comprises a composite cable core, an insulating filling layer 20, a wrapping tape layer 30, a sheath inner layer 40 and a fire-resistant outer layer 50 which are arranged from inside to outside in sequence.
The composite cable core is composed of a plurality of cables 10, and the number of the cables 10 is preferably 2-5. As shown in fig. 1, the present embodiment is 3 cables 10.
As shown in fig. 2, each cable 10 includes a wire core 11, a silicon rubber ceramic tape layer 12 and an insulating wear-resistant layer 13, which are arranged in sequence from inside to outside. The wire core 11 is a conductive carrier, is formed by drawing an oxygen-free copper rod into a copper wire and twisting the copper wire. In the cabling process of the wire core 11, a ceramic silicon rubber wrapping tape is adopted to wrap the outer surface of the wire core 11, and then the insulating wear-resistant layer 13 is used for wrapping. This is implementable by those skilled in the art in light of the technical solution, and the description is omitted for this purpose.
The ceramic silicon rubber wrapping tape has excellent flame retardant property, low heat productivity during combustion and excellent low smoke performance, and meets the environment-friendly performance. The thermal-insulated layer adopts ceramic material, and the crust becomes hard protective layer at the high temperature more than 350 ℃, and the interior is cellular aperture, can play fine thermal-insulated effect, and the crust performance is good in this material heating process simultaneously, does not drip, and low smoke performance is good.
Preferably, the insulating wear-resistant layer 13 is made of nylon.
Existing fire resistant cables focus on improving the performance of the cable jacket with little optimization of the improvement to the wire core 11. Through this design, optimize the structure of each cable 10, strengthen the fire-resistant fire-retardant protection to sinle silk 11. Meanwhile, the nylon has excellent corrosion resistance and wear resistance, and the manufactured insulating wear-resistant layer 13 improves the toughness of the cable 10, is wear-resistant and is termite-resistant. When the outer layer of the cable and the inner layer 40 of the sheath are damaged, the insulating wear-resistant layer 13 can also greatly prevent the wire core 11 from being exposed, so that accidents are avoided.
As shown in fig. 1, the insulating filler layer 20 is filled in the gap between the tape covering 30 and the composite cable core, and the technical solution of the insulating filler layer 20 is implemented by those skilled in the art. In this embodiment, the insulating filling layer 20 may be a fan-shaped filling strip made of rubber, such as PE; the insulating filler layer 20 may also be polypropylene rope filled.
The wrapping tape layer 30 is a ceramic silicon rubber wrapping tape, and has excellent flame retardant property, low heat productivity during combustion and excellent low smoke performance, and meets the environment-friendly performance. Adopt ceramic material around the band layer, crusting becomes hard protective layer at the high temperature more than 350 ℃, and interior being cellular aperture can play fine thermal-insulated effect, and this material heating process crusting performance is good simultaneously, does not drip, and low smoke performance is good.
Wherein, the sheath inner layer 40 is made of polyvinyl chloride sheath material.
The outer fire-resistant layer 50 is wrapped by a polyether-ether-ketone material and covers the inner layer of the sheath. The polyether-ether-ketone (PEEK) has higher melting point (334 ℃) and glass transition temperature (143 ℃), and the continuous use temperature is 260 ℃; the composite material is used for manufacturing the sheath layer 4 or the insulating layer 2, and can meet the use requirement of the cable in a high-temperature environment. The polyether-ether-ketone has self-extinguishing property, and can reach 94V-0 grade of UL standard and the optimal grade of flame retardance even if no flame retardant is added.
The combination of the fire-resistant outer layer 50 and the insulating wear-resistant layer 13 plays a role in protecting the cable core by two layers. The wear resistance of the cable is improved, and the probability of accidents caused by the fact that the wire core 11 is exposed is reduced.
Other structures of a fire-resistant pvc sheathed flexible cable 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 (7)
1. A fire-resistant polyvinyl chloride sheath flexible cable is characterized by comprising a composite cable core, a wrapping tape layer, a sheath inner layer and a fire-resistant outer layer which are sequentially arranged from inside to outside;
the composite cable core comprises a plurality of cables, and each cable comprises a cable core, a ceramic silicon rubber wrapping tape layer and an insulating wear-resistant layer which are sequentially arranged from inside to outside;
the fire-resistant outer layer is made of polyether-ether-ketone materials and covers the sheath inner layer in an extruding mode.
2. The fire resistant polyvinyl chloride jacketed flexible cable of claim 1, wherein:
the inner layer of the sheath is formed by extruding and covering polyvinyl chloride sheath materials on the wrapping belt layer.
3. The fire resistant polyvinyl chloride jacketed flexible cable of claim 1, wherein:
the winding belting layer is formed by wrapping ceramic silicon rubber belting on the composite cable core.
4. The fire resistant polyvinyl chloride jacketed flexible cable of claim 1, wherein:
and an insulating filling layer is arranged between the composite cable core and the wrapping tape layer.
5. The fire resistant polyvinyl chloride jacketed flexible cable of claim 1, wherein:
the edge wear-resistant layer is made of nylon materials.
6. The fire resistant polyvinyl chloride jacketed flexible cable of claim 1, wherein:
the wire core is formed by drawing an oxygen-free copper rod into a copper wire and twisting the copper wire.
7. The fire resistant polyvinyl chloride jacketed flexible cable of claim 1, wherein:
the composite cable core comprises 2-5 cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121465269.9U CN214897776U (en) | 2021-06-29 | 2021-06-29 | Fire-resistant polyvinyl chloride sheath flexible cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121465269.9U CN214897776U (en) | 2021-06-29 | 2021-06-29 | Fire-resistant polyvinyl chloride sheath flexible cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214897776U true CN214897776U (en) | 2021-11-26 |
Family
ID=78907166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121465269.9U Active CN214897776U (en) | 2021-06-29 | 2021-06-29 | Fire-resistant polyvinyl chloride sheath flexible cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214897776U (en) |
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2021
- 2021-06-29 CN CN202121465269.9U patent/CN214897776U/en active Active
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