CN212113293U - Medium-voltage fireproof power cable - Google Patents
Medium-voltage fireproof power cable Download PDFInfo
- Publication number
- CN212113293U CN212113293U CN202020396479.6U CN202020396479U CN212113293U CN 212113293 U CN212113293 U CN 212113293U CN 202020396479 U CN202020396479 U CN 202020396479U CN 212113293 U CN212113293 U CN 212113293U
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- China
- Prior art keywords
- layer
- gasbag
- piston
- power cable
- connecting block
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- 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.)
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011241 protective layer Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 40
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 abstract description 27
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 19
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000000576 coating method Methods 0.000 abstract description 16
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 12
- 230000002265 prevention Effects 0.000 abstract description 9
- 238000005253 cladding Methods 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model relates to the technical field of cables, especially, relate to a middling pressure fire prevention power cable, including center post, sinle silk unit, buffer unit, flame retardant coating and outer protective layer, it is a plurality of buffer unit circumference array is outside the center post, the sinle silk unit sets up between adjacent buffer unit, the flame retardant coating is with sinle silk unit and buffer unit cladding in, the outer protective layer cladding is outside the flame retardant coating, be equipped with the glass silk fibre band between flame retardant coating and the outer protective layer, the buffer unit includes flexure strip and gasbag, the gasbag intussuseption is filled with nitrogen gas, gasbag top integrated into one piece has spacing platform, spacing cross-section is T shape, spacing bench has been seted up the gas outlet, spacing bench cover is equipped with the connecting block, connecting block both ends lock is on the flexure strip. The utility model discloses, through setting up the gasbag to pack nitrogen gas in the gasbag, when the conflagration breaing out, the nitrogen gas blowout can effectively hinder the cable burning.
Description
Technical Field
The utility model relates to the technical field of cables, especially, relate to a middling pressure fire prevention power cable.
Background
The cable is generally used for information transmission and power transmission, and plays an important role in modern industry and people's life. The cable transmits signals or transmits power mainly by the wire core formed by the conductor inside the cable, and the stability of the transmission condition of the cable can often generate larger influence on industrial production and life of people, so that the wire core of the cable needs to be protected more thoroughly so as to be suitable for some extreme environments.
Along with the development of society, the fire prevention of high-rise buildings and important buildings is more and more paid attention to by people, and especially in areas where fire easily occurs, fire prevention cables are generally adopted. The fire-retardant cable in the prior art generally adopts a fire-retardant cable or a fire-resistant cable, the fire-retardant cable generally only adds a fire retardant into an insulating material and a sheath material, the insulating material and the sheath material can still be burnt, and once a fire disaster happens, the fire-retardant cable still can burn bear fire and can not effectively resist the fire.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a middling pressure fire prevention power cable is through setting up the gasbag to pack nitrogen gas in the gasbag, when the conflagration breaing out, the nitrogen gas blowout can effectively hinder the cable burning.
The utility model discloses an above-mentioned technical problem is solved to following technical means:
the utility model provides a middling pressure fire prevention power cable, includes center post, sinle silk unit, buffer unit, flame retardant coating and outer protective layer, and is a plurality of buffer unit circumference array is outside the center post, the sinle silk unit sets up between adjacent buffer unit, the flame retardant coating is with sinle silk unit and buffer unit cladding in, the outer protective layer cladding is outside the flame retardant coating, be equipped with the glass silk fibre area between flame retardant coating and the outer protective layer, buffer unit includes flexure strip and gasbag, the gasbag intussuseption is filled with nitrogen gas, gasbag top integrated into one piece has spacing platform, spacing platform cross-section is T shape, spacing bench has seted up the gas outlet, spacing bench cover is equipped with the connecting block, connecting block both ends lock is on the flexure strip.
Further, the elastic pieces are arranged oppositely, the elastic pieces are fixedly connected with the central column, the two elastic pieces are radial from inside to outside and have a certain radian, and the air bag is arranged between the two elastic pieces and is attached to the central column on the inner side. The elastic sheet can decompose pressure, so that the pressure is diffused, and meanwhile, the air bag can absorb the pressure, so that the compression resistance of the cable is improved.
Further, the sinle silk unit includes sinle silk, interior semiconduction shielding layer, crosslinked polyethylene insulating layer, outer semiconduction shielding layer, copper tape layer, spacer sleeve and the buffer layer that sets gradually from inside to outside, the buffer layer is laminated with the flexure strip, and the inboard and the center post laminating of buffer layer, the outside and the laminating of flame retardant coating.
Further, the mounting groove has been seted up on the connecting block, install piston and spring in the mounting groove, the end of piston is inserted and is established in the gas outlet, integrated into one piece has the limiting plate on the piston, the spring housing is established on the piston, and spring one end meets with the limiting plate, and the other end meets with the mounting groove bottom surface.
Further, connecting block top integrated into one piece has the boss, be equipped with the inflation piece in the boss, the inflation piece meets with the piston, and the inflation piece can get into in the mounting groove.
Further, all seted up the air channel on piston and the connecting block, the terminal slope of air channel sets up, and the blowout port of crescent nitrogen gas for the nitrogen gas in the gasbag can continue the blowout, prolongs fire-retardant time.
The utility model has the advantages that: on one hand, the utility model increases the fire resistance of the whole cable through the glass fiber band and the fireproof layer; on the other hand, when the cable is about to burn, the airbag, the expansion block and the piston expand to allow the end of the piston to enter the airbag, the vent groove of the piston communicates with the inside of the airbag, and nitrogen in the airbag is ejected from the vent groove to inhibit the cable from burning. The elastic unit composed of the air bag and the elastic sheet can effectively decompose and absorb pressure, and the compression resistance of the cable is improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a medium-voltage fireproof power cable according to the present invention;
FIG. 2 is an enlarged schematic view of A in FIG. 1;
fig. 3 is a schematic structural diagram of a core unit in a medium-voltage fireproof power cable according to the present invention;
fig. 4 is a schematic structural view of an air chute unit of a medium-voltage fireproof power cable according to the present invention;
fig. 5 is a schematic structural view of a medium-voltage fireproof power cable according to the present invention;
FIG. 6 is an enlarged schematic view of A in FIG. 5;
the cable comprises a central column 1, a cable core unit 2, a cable core 21, an inner semi-conductive shielding layer 22, a crosslinked polyethylene insulating layer 23, an outer semi-conductive shielding layer 24, a copper strip layer 25, an isolation sleeve 26, a buffer layer 27, a buffer unit 3, an elastic sheet 31, an air bag 32, a limiting table 321, an air outlet 322, a connecting block 33, a mounting groove 331, a boss 332, a vent groove 333, a fireproof layer 4, an outer protective layer 5, a glass fiber belt 6, a piston 71, a limiting plate 711, a spring 72 and an expansion block 73.
Detailed Description
The invention will be described in detail with reference to the following drawings and specific embodiments:
as shown in fig. 1-6, the utility model discloses a middling pressure fire prevention power cable, including center post 1, sinle silk unit 2, buffer unit 3, flame retardant coating 4 and outer protective layer 5, 3 circumference arrays of a plurality of buffer unit are outside center post 1, and sinle silk unit 2 sets up between adjacent buffer unit 3, and including flame retardant coating 4 makes sinle silk unit 2 and buffer unit 3 cladding, flame retardant coating 4 is made by the fire prevention mud of mineral substance, strengthens the fire behavior of cable. The outer protective layer 5 cladding is outside flame retardant coating 4, and outer protective layer 5 comprises the crowded package of high fire-retardant low smoke and zero halogen cable material, is equipped with glass silk fibre band 6 between flame retardant coating 4 and outer protective layer 5, further strengthens the fire behavior of cable.
Buffer unit 3 includes two flexure strips 31 and gasbag 32, two flexure strips 31 set up relatively, flexure strip 31 and 1 fixed connection of center post, two flexure strips 31 are radially by inside to outside, and have certain radian, gasbag 32 sets up between two flexure strips 31, and inboard and the laminating of center post 1, when the cable received the extrusion, flexure strip 31 can decompose pressure, make pressure diffusion, prevent that too strong pressure from appearing and use a department to the cable, lead to the damaged condition of cable. Meanwhile, the air bag 32 can absorb pressure, and the pressure resistance of the cable is further improved.
The wire core unit 2 comprises a wire core 21, an inner semi-conductive shielding layer 22, a crosslinked polyethylene insulating layer 23, an outer semi-conductive shielding layer 24, a copper strip layer 25, an isolation sleeve 26 and a buffer layer 27 which are sequentially arranged from inside to outside. Buffer layer 27 and flexure strip laminating, and the inboard of buffer layer 27 and the laminating of center post 1, the outside and flame retardant coating 4 laminating. The crosslinked polyethylene insulating layer 23 is made of crosslinked polyethylene, and has high insulating electrical properties, light specific gravity, good mechanical properties, and improved heat resistance. The copper tape layer 25 is made of a tinned copper wire braid, and has strong external electromagnetic interference resistance and corrosion resistance. The insulating sleeve 26 can insulate the copper strip to prevent the copper strip from being oxidized.
The gasbag 32 intussuseption is filled with nitrogen gas, and the external conflagration breaks out, and during the cable burning, nitrogen gas in the gasbag 32 can be effectively fire-retardant, prevents that the sinle silk from being burnt.
A boss 332 is integrally formed at the top end of the connecting block 33, an expansion block 73 is arranged in the boss 332, the expansion block 73 is connected with the piston 71, and the expansion block 73 can enter the mounting groove 331. When fire breaks out from the outside, high temperature is transmitted to the expansion block 73 through the outer layer of the cable, the expansion block 73 is heated and expanded, and enters the installation groove 331, so that the piston 71 moves downwards, and the spring 72 is compressed, so that the tail end of the piston 71 enters the air bag 32. After the temperature has dropped, the expansion block 73 contracts and the spring 72 moves the piston 71 upward, re-closing the air-bag 32.
The piston 71 and the connecting block 33 are both provided with vent grooves 333, and when the tail end of the piston 71 enters the air bag 32, nitrogen in the air bag 32 is sprayed out through the vent grooves 333, so that a good flame-retardant effect can be achieved. The end of the vent groove 333 is inclined so that the nitrogen gas discharge port is gradually increased when the piston 71 moves downward, and the nitrogen gas in the bladder 32 is continuously discharged, thereby prolonging the flame-retardant time.
The utility model discloses a middling pressure fire prevention power cable, when external fire, the cable bears the high temperature, through the heat resistance of glass silk ribbon 6 and flame retardant coating 4, under certain high temperature scene, keeps the transmission work of cable. When the cable is to be burnt, high temperature is transmitted to the expansion block 73 through the outer layer of the cable, the expansion block 73 is heated and expanded and enters the installation groove 331, the piston 71 moves downwards, the spring 72 is compressed, the tail end of the piston 71 enters the air bag 32, nitrogen in the air bag 32 is sprayed outwards through the vent groove 333, and a good flame retardant effect can be achieved.
Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.
Claims (6)
1. A medium voltage fireproof power cable is characterized in that: the buffer structure comprises a central column (1), wire core units (2), buffer units (3), a fireproof layer (4) and an outer protective layer (5), wherein the buffer units (3) are circumferentially arrayed outside the central column (1), the wire core units (2) are arranged between the adjacent buffer units (3), the fireproof layer (4) covers the wire core units (2) and the buffer units (3), the outer protective layer (5) covers the fireproof layer (4), a glass fiber band (6) is arranged between the fireproof layer (4) and the outer protective layer (5), the buffer units (3) comprise elastic sheets (31) and air bags (32), nitrogen is filled in the air bags (32), a limiting platform (321) is integrally formed at the top end of each air bag (32), the cross section of each limiting platform (321) is T-shaped, and air outlets (322) are formed in the limiting platform (321), spacing platform (321) are gone up the cover and are equipped with connecting block (33), connecting block (33) both ends lock is on flexure strip (31).
2. A medium voltage fire power cable according to claim 1, characterized in that: the utility model discloses an air bag, including center post (1), flexure strip (31), gasbag (32), gasbag, air bag, flexure strip (31) and center post (1) fixed connection, two flexure strip (31) are radial from inside to outside, and have certain radian, gasbag (32) set up between two flexure strips (31), and inboard and center post (1) laminating.
3. A medium voltage fire power cable according to claim 2, characterized in that: the cable core unit (2) comprises a cable core (21), an inner semi-conductive shielding layer (22), a cross-linked polyethylene insulating layer (23), an outer semi-conductive shielding layer (24), a copper tape layer (25), an isolation sleeve (26) and a buffer layer (27), wherein the cable core, the inner semi-conductive shielding layer (22), the cross-linked polyethylene insulating layer (23), the outer semi-conductive shielding layer (24), the copper tape layer (25), the isolation sleeve (26) and the buffer layer (27) are sequentially arranged from inside to outside, the buffer layer (27) is attached to the elastic sheet (31).
4. A medium voltage fire power cable according to claim 3, characterized in that: mounting groove (331) have been seted up on connecting block (33), install piston (71) and spring (72) in mounting groove (331), the end of piston (71) is inserted and is established in gas outlet (322), integrated into one piece has limiting plate (711) on piston (71), spring (72) cover is established on piston (71), and spring (72) one end meets with limiting plate (711), and the other end meets with mounting groove (331) bottom surface.
5. A medium voltage fireproof power cable according to claim 4, wherein: connecting block (33) top integrated into one piece has boss (332), be equipped with inflation piece (73) in boss (332), inflation piece (73) meet with piston (71), and inflation piece (73) can get into in mounting groove (331).
6. A medium voltage fireproof power cable according to claim 5, wherein: and the piston (71) and the connecting block (33) are both provided with vent grooves (333), and the tail ends of the vent grooves (333) are obliquely arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396479.6U CN212113293U (en) | 2020-03-25 | 2020-03-25 | Medium-voltage fireproof power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396479.6U CN212113293U (en) | 2020-03-25 | 2020-03-25 | Medium-voltage fireproof power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212113293U true CN212113293U (en) | 2020-12-08 |
Family
ID=73639315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020396479.6U Expired - Fee Related CN212113293U (en) | 2020-03-25 | 2020-03-25 | Medium-voltage fireproof power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212113293U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112614613A (en) * | 2020-12-10 | 2021-04-06 | 李兴 | Anti-shearing self-restoring pressure-resistant cable |
| CN114843015A (en) * | 2022-06-30 | 2022-08-02 | 南通市通能通讯科技有限公司 | Pneumatic impact-resistant cable for ships |
| CN116504452A (en) * | 2023-04-23 | 2023-07-28 | 江苏汉昇线缆科技有限公司 | Flame-retardant high-temperature-resistant composite cable |
-
2020
- 2020-03-25 CN CN202020396479.6U patent/CN212113293U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112614613A (en) * | 2020-12-10 | 2021-04-06 | 李兴 | Anti-shearing self-restoring pressure-resistant cable |
| CN114843015A (en) * | 2022-06-30 | 2022-08-02 | 南通市通能通讯科技有限公司 | Pneumatic impact-resistant cable for ships |
| CN116504452A (en) * | 2023-04-23 | 2023-07-28 | 江苏汉昇线缆科技有限公司 | Flame-retardant high-temperature-resistant composite cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |