CN214505079U - Expansion flame-retardant power cable - Google Patents
Expansion flame-retardant power cable Download PDFInfo
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- CN214505079U CN214505079U CN202120188271.XU CN202120188271U CN214505079U CN 214505079 U CN214505079 U CN 214505079U CN 202120188271 U CN202120188271 U CN 202120188271U CN 214505079 U CN214505079 U CN 214505079U
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Abstract
The utility model relates to an inflation fire-retardant type power cable relates to the field of cable, including insulating sinle silk and the insulating cover of first fire prevention, still include metal fire prevention net and fire-retardant filler, including the insulating cover parcel of first fire prevention of metal fire prevention net, there is certain clearance between the insulating cover of first fire prevention and the insulating sinle silk, fire-retardant filler is with the clearance packing. The metal fire prevention net can also play the effect that increases cable resistance intensity when further increasing the fire behavior of cable, and the cotton can also fix the position of insulating sinle silk in the insulating cover of first fire prevention on fire-retardant basis, increases insulating sinle silk's stability.
Description
Technical Field
The application relates to the field of cables, in particular to an expansion flame-retardant power cable.
Background
With the rapid development of economy, cables are widely used in power transmission, and the cables are made of one or more conductors insulated from each other and a protective insulating layer covering the conductors to transmit power or information from one place to another. At present, along with the development of society, the power consumption is increased, and the requirement on cables is higher and higher. Fire-resistant cable means a cable that can be kept in operation safely for a certain period of time in the event of a flame burn. Fire-resistant cables are widely used in places related to fire safety and fire life saving, such as high-rise buildings, underground railways, underground streets, large power stations, and important industrial and mining enterprises, for example, power supply lines and control lines of emergency facilities such as fire-fighting equipment and emergency guide lamps.
As shown in fig. 1, the flame-retardant power cable of the related art includes a first fireproof insulating sleeve 18, a ground wire 15, and a plurality of insulating wire cores 14, wherein the first fireproof insulating sleeve 18 wraps the ground wire 15 and the plurality of insulating wire cores 14.
The above-mentioned related technical solutions have the following drawbacks: after the flame-retardant power cable is bent for many times, the first fireproof insulating sleeve is possibly damaged, and the normal work of the cable is influenced when fire contacts the insulating wire core.
SUMMERY OF THE UTILITY MODEL
In order to reduce the probability of the influence of the damaged back to the cable normal work of first fire prevention insulating cover appearance, this application provides an inflation fire-retardant type power cable.
The application provides an inflation fire-retardant type power cable adopts following technical scheme:
the utility model provides an inflation fire-retardant type power cable, includes insulating sinle silk and the insulating cover of first fire prevention, still includes metal fire prevention net and fire-retardant filler, including metal fire prevention net wraps up the insulating cover of first fire prevention, there is certain clearance between the insulating cover of first fire prevention and the insulating sinle silk, the gap is filled to fire-retardant filler.
Through adopting above-mentioned technical scheme, the metal fire prevention net can also play the effect that increases cable resistance intensity when further increasing the fire behavior of cable, and the cotton can also fix the position of insulating sinle silk in the insulating cover of first fire prevention on fire-retardant basis, increases the stability of insulating sinle silk.
Preferably, three groove cavities are uniformly formed in the outer wall of the flame-retardant filler along the circumferential direction, and thermal expansion blocks are arranged in the groove cavities.
Through adopting above-mentioned technical scheme, because flame retarded cable uses under the higher environment of temperature usually, the thermal expansion piece is met heat and is produced the inflation, until the thermal expansion piece expand towards fireproof cotton center one side jointly, three thermal expansion piece mutual butt forms three inflation strong point, by outer and on the heat mainly transmits three thermal expansion piece, three inflation strong point can play the supporting role to first fire prevention insulating boot, can absorb most heat again, plays the guard action to insulating core.
Preferably, still include three parting bead, three parting bead and three thermal expansion piece one-to-one, the length direction of parting bead is on a parallel with the insulation core, and one side lateral wall fixed connection of three parting bead is in the same place, and the opposite side lateral wall of three parting bead is fixed connection respectively in the one end that first fire prevention insulation cover inner wall was kept away from to the corresponding thermal expansion piece.
Through adopting above-mentioned technical scheme, the supporting role to three thermal expansion piece has been strengthened to the parting bead, and the parting bead separates into the space that three size is the same with the inside space of first fire prevention insulating boot simultaneously, and insulating sinle silk can be arranged in these spaces, is avoided being extruded probability by three thermal expansion piece when insulating sinle silk is located three thermal expansion piece center, plays the guard action to insulating sinle silk.
Preferably, still include three and accept the board, three board and three parting bead one-to-one are accepted to the three, it corresponds on the parting bead orientation corresponds one side lateral wall of thermal expansion piece to accept board fixed connection, it offers the arcwall face that matches with the thermal expansion piece to accept the board towards the one end of thermal expansion piece, it is in the same place with thermal expansion piece fixed connection to accept the board.
Through adopting above-mentioned technical scheme, accept the board and have bigger area of contact, can reduce thermal expansion piece and accept the probability of removing each other between the board, increase the stability of parting bead.
Preferably, the cable further comprises a plurality of toughness strips, the length directions of the toughness strips are parallel to the length directions of the insulated wire cores, the first fireproof insulating sleeve wraps the toughness strips and the insulated wire cores, a certain gap exists between the first fireproof insulating sleeve and the insulated wire cores as well as between the first fireproof insulating sleeve and the toughness strips, and the gap is filled with the flame-retardant filler.
Through adopting above-mentioned technical scheme, when buckling and dragging the cable, insulating core bears the effort that most were buckled or were dragged, makes insulating core fracture influence the use of cable easily, and the toughness strip can effectively increase the tensile bending strength of cable, increases the toughness of cable, and then increases the life of cable.
Preferably, the flexible strip is a steel wire rope.
Through adopting above-mentioned technical scheme, the steel wire cable has non-combustible characteristic at first, and the steel wire cable has better tensile resistance and bending nature secondly, can replace insulating sinle silk to bear the effort of buckling and pulling that some cables received, reduces insulating sinle silk cracked probability, increases the life of cable.
Preferably, the fireproof insulation device further comprises a second fireproof insulation sleeve, and the second fireproof insulation sleeve wraps the metal fireproof net.
Through adopting above-mentioned technical scheme, the insulating cover of second fire prevention has better parcel nature, can cover whole metal fire prevention net surface, increases cable surface's feeling, can further increase the fire behavior of cable simultaneously.
Preferably, the flame-retardant filler is fireproof cotton.
Through adopting above-mentioned technical scheme, the fireproof cotton has fire-retardant and thermal-insulated effect, and contact with the fire or be in high temperature environment and can not burn down, and the fireproof cotton has better ductility simultaneously, the deformation of adaptation thermal expansion piece that can be better.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the thermal expansion blocks, the thermal expansion blocks expand when being heated, the thermal expansion blocks expand towards one side of the center of the fireproof cotton together, the three thermal expansion blocks are mutually abutted to form three expansion supporting points, and the three expansion supporting points can play a supporting role on the first fireproof insulation sleeve;
2. by arranging the steel wire rope, the steel wire rope firstly has the incombustible characteristic, and secondly has better tensile resistance and bending property, so that the steel wire rope can replace the insulating wire core to bear the acting force of bending and pulling on a part of cables, and the probability of breakage of the insulating wire core is reduced;
3. through setting up fireproof cotton, fireproof cotton has fire-retardant and thermal-insulated effect, and contact or be in high temperature environment can not burn with the fire, and fireproof cotton has better ductility simultaneously, the deformation of adaptation thermal expansion piece that can be better.
Drawings
Fig. 1 is an overall structural diagram of the related art.
Fig. 2 is a schematic overall structure diagram of an embodiment of the present application.
Description of reference numerals: 1. a second fireproof insulating sleeve; 11. a thermal expansion block; 12. a slot cavity; 13. a wire core support; 131. a parting strip; 132. a bearing plate; 14. an insulated wire core; 141. a third fire prevention insulating sleeve; 142. a copper core; 15. a ground line; 16. fireproof cotton; 17. a wire rope; 18. a first fireproof insulating sleeve; 19. a metal fireproof net.
Detailed Description
The present application is described in further detail below with reference to fig. 2.
The embodiment of the application discloses fire-retardant type power cable expands.
Referring to fig. 2, the anti-extrusion cable of fire-retardant type of inflation of this embodiment includes that the anti-extrusion cable of this embodiment includes first fire-proof insulation cover 18, parting bead 131, thermal resistance burning piece and fire-retardant filler, set up the passageway of both ends intercommunication on the first fire-proof insulation cover 18, the space in the passageway is whole to be filled with fire-retardant filler, three vallecular cavity 12 has evenly been seted up along circumferential direction to fire-retardant filler outer wall, fixedly connected with thermal expansion block 11 in the vallecular cavity 12, the length direction of thermal expansion block 11 is on a parallel with the length direction of first fire-proof insulation cover 18. The one end terminal surface that thermal expansion piece 11 is close to first fire prevention insulating cover 18 inner wall is the bottom surface, and other end terminal surface is the top surface, and thermal expansion piece 11 diminishes by bottom surface to top surface one side cross sectional area gradually, and thermal expansion piece 11 bottom surface and the first fire prevention insulating cover 18 inner wall laminate completely.
Referring to fig. 2, the cable further includes three parting beads 131, the length direction of the parting beads 131 is parallel to the length direction of the insulated wire core 14, the side walls of one side of the three parting beads 131 are fixedly connected together, the side walls of the other side of the three parting beads 131 are respectively and fixedly connected with a receiving plate 132, an arc-shaped surface matched with the thermal expansion block 11 is arranged at one end of the receiving plate 132 facing the thermal expansion block 11, and the top surface of the thermal expansion block 11 and the side surface of one side of the receiving plate 132 far away from the parting beads 131 are completely attached and fixed together.
Referring to fig. 2, the cable further includes a grounding wire 15, a flexible strip and two insulated wire cores 14, the flexible strip is a steel wire rope 17, the grounding wire 15, the steel wire rope 17 and the two insulated wire cores 14 are all located in the channel, the length directions of the grounding wire 15, the steel wire rope 17 and the two insulated wire cores 14 are all parallel to the length direction of a first fireproof insulating sleeve 18, and the grounding wire 15, the steel wire rope 17 and the two insulated wire cores 14 are wrapped in the first fireproof insulating sleeve 18. The three parting beads 131 and the cooperation of three hot fire-retardant piece divide into three chamber that hold with the passageway, and earth connection 15 and two insulation core 14 are located three chamber that hold respectively, and fire-retardant filler is used for filling the clearance in the passageway.
Referring to fig. 2, the insulated wire core 14 includes a third fire-proof insulating sleeve 141 and a plurality of strands of copper cores 142, and firstly, an antioxidant coating, such as copper wire antioxidant RY-206, is coated on the plurality of strands of copper cores 142, and after the insulated wire core is used, an antioxidant film is formed on the surface of the copper core 142 to isolate the copper core from air, so that the effects of slowing down the discoloration and oxidation blackening of the copper core 142 can be achieved, and the service life of the copper core 142 can be prolonged. The length directions of the multiple strands of copper cores 142 are arranged in parallel, and the multiple strands of copper cores 142 are wrapped by the third fireproof insulating sleeve 141.
Referring to fig. 2, the ground line 15 may be a relatively common two-color ground line 15, and mainly plays a role of preventing electric leakage.
Referring to fig. 2, the filler is fireproof cotton 16, and fireproof cotton 16 can also play the effect of fixed many wire cables 17 and many insulation core 14 under the fire-retardant prerequisite of preventing fires, makes the cable more round simultaneously, improves the roundness of cable to reduce the friction between wire cable 17 and the insulation core 14, increase the life of cable. The steel wires 17 are uniformly distributed in the filler, firstly the steel wires 17 have non-flammable characteristics, secondly the steel wires 17 have better tensile resistance and bending property, and can replace the insulated wire cores 14 to bear the action force of bending and pulling on a part of cables, thereby reducing the probability of breakage of the insulated wire cores 14 and prolonging the service life of the cables.
Referring to fig. 2, the cable further comprises a metal fireproof net 19 and a second fireproof insulating sleeve 1, the first fireproof insulating sleeve 18 is wrapped by the metal fireproof net 19, and the metal fireproof net 19 can further increase the fireproof performance of the cable and also play a role in increasing the strength resistance of the cable. Including the insulating cover of second fire prevention 1 wraps up metal fire prevention net 19, insulating cover of second fire prevention 1 has better parcel nature, can cover whole metal fire prevention net 19 surface, increases cable surface's feeling, can further increase the fire behavior of cable simultaneously.
The implementation principle of the intumescent flame-retardant power cable in the embodiment of the application is as follows: when the cable meets fire, the second fireproof insulating sleeve 1, the metal fireproof net 19 and the first fireproof insulating sleeve 18 which are positioned on the outer surface of the cable can sequentially prevent fire from burning to the insulating wire core 14 inside the cable, meanwhile, the thermal expansion block 11 expands when being heated, the thermal expansion block 11 after expansion abuts against the bearing plate 132 and the first fireproof insulating sleeve 18, the first fireproof insulating sleeve 18 is supported, meanwhile, the thermal expansion block 11 can absorb most of heat, and as the fireproof cotton 16 has the effects of inflaming retarding and heat insulation, the direct transmission of heat to the insulating wire core 14 and the grounding wire 15 can be reduced, and the insulating wire core 14 and the grounding wire 15 are protected.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides an inflation fire-retardant type power cable, includes insulating sinle silk (14) and first fire prevention insulating boot (18), its characterized in that: still include metal fire prevention net (19) and fire-retardant filler, including metal fire prevention net (19) wraps up first fire prevention insulating cover (18), there is certain clearance between first fire prevention insulating cover (18) and insulating sinle silk (14), fire-retardant filler fills the clearance, three vallecular cavity (12) have evenly been seted up along the circumferential direction to fire-retardant filler outer wall, are equipped with thermal expansion piece (11) in vallecular cavity (12).
2. The intumescent flame retardant power cable according to claim 1, wherein: still include three parting bead (131), three parting bead (131) and three thermal expansion piece (11) one-to-one, the length direction of parting bead (131) is on a parallel with insulated wire core (14), and one side lateral wall fixed connection of three parting bead (131) is in the same place, and the opposite side lateral wall of three parting bead (131) is fixed connection respectively and is kept away from the one end of first fire prevention insulating boot (18) inner wall in corresponding thermal expansion piece (11).
3. The intumescent flame retardant power cable according to claim 2, wherein: still include three and accept board (132), three board (132) and three parting bead (131) one-to-one are accepted to the three, accept on board (132) fixed connection corresponds parting bead (131) one side lateral wall towards corresponding thermal expansion piece (11), accept board (132) and offer the arcwall face that matches with thermal expansion piece (11) towards the one end of thermal expansion piece (11), accept board (132) and thermal expansion piece (11) fixed connection together.
4. The intumescent flame retardant power cable according to claim 1, wherein: still include a plurality of toughness strips, the length direction of a plurality of toughness strips is on a parallel with the length direction of insulating sinle silk (14), including first fire prevention insulating boot (18) wraps up a plurality of toughness strips and a plurality of insulating sinle silk (14), there is certain clearance between first fire prevention insulating boot (18) and insulating sinle silk (14) and the toughness strip, fire-retardant filler is with the clearance packing.
5. The intumescent flame retardant power cable according to claim 4, wherein: the flexible strip is a steel wire rope (17).
6. The intumescent flame retardant power cable according to claim 1, wherein: the fireproof metal net is characterized by further comprising a second fireproof insulating sleeve (1), and the metal fireproof net (19) is wrapped in the second fireproof insulating sleeve (1).
7. The intumescent flame retardant power cable according to claim 1, wherein: the flame-retardant filler is fireproof cotton (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120188271.XU CN214505079U (en) | 2021-01-23 | 2021-01-23 | Expansion flame-retardant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120188271.XU CN214505079U (en) | 2021-01-23 | 2021-01-23 | Expansion flame-retardant power cable |
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| Publication Number | Publication Date |
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| CN214505079U true CN214505079U (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120188271.XU Active CN214505079U (en) | 2021-01-23 | 2021-01-23 | Expansion flame-retardant power cable |
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| CN (1) | CN214505079U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117334389A (en) * | 2023-11-10 | 2024-01-02 | 人民电缆集团有限公司 | High-protection online intelligent monitoring cable |
-
2021
- 2021-01-23 CN CN202120188271.XU patent/CN214505079U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117334389A (en) * | 2023-11-10 | 2024-01-02 | 人民电缆集团有限公司 | High-protection online intelligent monitoring cable |
| CN117334389B (en) * | 2023-11-10 | 2024-05-14 | 人民电缆集团有限公司 | High-protection online intelligent monitoring cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An expansion flame retardant power cable Effective date of registration: 20230606 Granted publication date: 20211026 Pledgee: Zhejiang Luqiao Taizhou rural commercial bank Limited by Share Ltd. Pledgor: QUANTONG CABLE LIMITED BY SHARE LTD. Registration number: Y2023330001093 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |