CN208873501U - A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable - Google Patents
A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable Download PDFInfo
- Publication number
- CN208873501U CN208873501U CN201821701174.0U CN201821701174U CN208873501U CN 208873501 U CN208873501 U CN 208873501U CN 201821701174 U CN201821701174 U CN 201821701174U CN 208873501 U CN208873501 U CN 208873501U
- Authority
- CN
- China
- Prior art keywords
- fire
- core
- cable
- fire prevention
- retardant
- 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
Abstract
The utility model discloses a kind of fire-retardant B1 type fire resisting low smoke and zero halogen crosslinked cables, including cable core, the cable core is formed by three power wire cores, a neutral core, the twisted gap location filling amount being integrated afterwards and between each core of a piece-root grafting wire core beyond the glass silk fiber rope of cable core diameter 2-4mm；Wrapped first fire prevention belting layer and the second fire prevention belting layer outside cable core, extrude refuge floor between the first fire prevention belting layer and the second fire prevention belting layer, extrude high flame resistance, low smoke halogen-free polyolefin oversheath outside the second fire prevention belting layer；The key property of the cable is to meet cable and the test of optical cable classification system for fire performance of the B1 (d1, t1, a1) of GB 31247-2014.
Description
Technical field:
The utility model relates to a kind of fire-retardant B1 grades of cross-linked polyethylene insulated cable, specially a kind of voltage rating 0.6/
1kV is crosslinked polyetylene insulated by the fire-retardant B1 grades of fire resisting low-smoke halogen-free cable of GB31247-2014, belongs to field of cable technology.
Background technique:
With the rapid development of our country's economy, the propulsion of urbanization, especially big city, the development of megalopolis, city
Population it is more and more intensive, function becomes increasingly complex, as populations such as subway, hospital, airport, theater, coliseum and markets
Dense area, the security performance of power supply system require higher and higher, especially to prevent electric fault and the fire thing that causes
Therefore.It is seen according to the Fire Data in recent years that the Fire Department of Ministry of Public Security announces, electrical fire accounts for 30% or so of sum, and all kinds of
In fire caused by electrical, 40% or more is as caused by cable, therefore it is necessary to which requiring to configure cable therewith must be excellent
Fire-retardant and fire resistance.
It is mainly " fire-retardant logical with fire-resistant wire and cable with GB/T19666-2005 to execute standard for domestic flame retardant cable at present
It then " is main foundation, wherein the test method standard of examination flame retardant property is that " cable and optical cable are in flame by GB/T18380-2008
Under the conditions of combustion test ", the main foundation that cable-flame retardant is examined in the standard is defined specimen length in defined fire
It burns under the conditions of flame temperature, whether the height of the burned charing of final sample of cable is qualified come the flame retardant property for judging cable.?
That is the standard mainly prevents the rate of propagation of flame as the unique of cable-flame retardant with cable under Fire Conditions
Index, and actually fire occur when, combustion process is a complicated chemical reaction process, is not only that simple flame is climing
Prolong, be directed to the sprawling of flame, heat release rate, hot total volume, fire growth rate index, produce cigarette rate peak value and
Cigarette total amount etc. is produced, interacts, influences each other between these indexs, the comprehensive development and tendency that decide combustion process, so,
Only with the height of simple propagation of flame, the flame retardant effect of Lai Kaohe cable is unilateral.Standard GB/T 31247- thus
The Judging index of flame retardant property in 2014 " cable and optical cable classification system for fire performance " for cable is comprehensively considered, the standard
It is the advanced standard of correlation for having references to the country such as European Union, wherein including that flame is climing to the performance assessment criteria of the flame retardant cable of B1 rank
Prolong height, heat release rate peak value, the hot total volume by fiery 1200s, fire growth rate index, produce cigarette rate peak value and
By the production cigarette total amount in fiery 1200s, carry out the anti-flammability of comprehensive judgement cable.So Yao Yanfa meets the flame retardant cable of the standard,
It is to be totally different from conventional flame retardant cable, needs to carry out innovative design in the various aspects such as the construction of cable and selection.
Utility model content:
The utility model provides a kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable for prior art situation,
The flame retardant property of the cable meets the requirement of B1 rank as defined in GB31247-2014, by its fire of test method as defined in the standard
Flame spreads FS≤1.5m, heat release rate peak value HRR peak value≤30kw, by total volume THR hot in fiery 1200s1200≤15MJ、
Fire growth rate index FIGRA≤150W/s, cigarette rate peak value SPR peak value≤0.25m is produced2/ s, by the production cigarette in fiery 1200s
Total amount TSP1200≤50m2.By the cable provided by the utility model of the examination of the standard summary index, have superior
Anti-flammability can satisfy the densely populated area such as subway, hospital, airport, theater, coliseum and market, power supply system
Electric fire-control requirement.
A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable described in the utility model, including cable core, it is described
Cable core by three power wire cores, a neutral core, a piece-root grafting wire core it is twisted be integrated it is rear and between each core between
Amount is filled at gap to form beyond the glass silk fiber rope of cable core diameter 2-4mm；The wrapped first fire prevention belting layer and the outside cable core
Two fire prevention belting layers extrude refuge floor between the first fire prevention belting layer and the second fire prevention belting layer, in the second fire prevention belting layer
High flame resistance, low smoke halogen-free polyolefin oversheath is extruded outside.
Be further improved, the structure of the power wire core, neutral core and ground connection core is identical, by conductor, around
Mica tape fireprotection layer outside conductor, the crosslinked polyetylene insulated layer being extruded in outside mica tape fireprotection layer and around being crosslinked poly- second
Glass fiber band fireprotection layer outside alkene insulating layer is constituted.
It is further improved, three power wire cores, a neutral core and a ground connection core are twisted by cabling device
It is integrated, while adding glass fiber rope material in cable core gap, it is desirable that packing material must be closely knit is full of core
Between gap, guarantee burning when, air-flow cannot quickly be flowed along cable core, at the same fill outer diameter should be greater than calculate outer diameter 2-
4mm guarantees that packing material wraps up insulated wire cores, prevents inflammable crosslinked polyetylene insulated conflagration, causes hot release value super
Mark.
It is further improved, the first fire prevention belting layer and the second fire prevention belting layer are flame resistant glass silk fiber band.
It is further improved, the refuge floor is using the flexible oxygen barrier filling mud of ceramic fireproof minerals, and the material is just
There is good flexibility under normal state, do not influence the bending of cable, in flame combustion, can crust in ceramic, it can
Effective prevention flame further burns inside cable.
It is further improved, the oversheath uses high flame resistance, low smoke halogen-free polyolefin protective cover material, which has compared with high fire-retardance
Property, oxygen index (OI) reaches 35% or more, can effectively prevent propagation of flame, while in burning, not dripping, and smoke is low, and no toxic have
Harmful gas releases.
Compared with prior art, the utility model has the beneficial effects that:
The direct target of the utility model be by by conventional cross-linked polyethylene insulated cable in structure and selection
Innovative design is carried out, to reach its conventional electrical performance and in the case that mechanical performance meets national standard, flame retardant property reaches
Fire-retardant B1 grades of requirement as defined in GB31247-2014；GB31247-2014 national standard is the advanced mark for having references to the country such as European Union
Standard, the performance assessment criteria of fire-retardant B1 rank cable use the sprawling of flame, heat release rate, hot total volume, burning growth
Rate Index produces cigarette rate peak value and produces the multiple combustion indexes progress comprehensive judgements of cigarette total amount, more scientific and reasonable, more meets
The process that fire burning occurs, rather than traditional flame retardant cable is examined only with one index of propagation of flame；So meeting
Its flame retardant property of the cable of the standard is required with height, more comprehensively, more secure and reliable；In city underground, hospital, airport, theater, big
The densely populated occasion such as type stadium and market, it is more and more to require using the cable by fire-retardant B1 rank.
The insulation of the utility model still uses cross-linking polyethylene materials, it is ensured that cable has preferable electrical property, routinely
It can be provided by standard；Because crosslinked polyethylene is combustible material, so needing to redesign, protection insulation as far as possible is not by flame
Burning, causes Heat liberation unit exceeded；For this purpose, being formed finally together in the outer glass fiber that devises of insulation with fireprotection layer first
Fire-proof curtain；The dense packing effect glass fiber rope in cable core, and require glass fiber rope that insulated wire cores are fully wrapped around,
Further protection insulation, filling are had to closely knit, it is ensured that when burning flame cannot passage flow along longitudinal direction, cause quickly to spread.
A fire insulation layer material is extruded on cable core, which is the flexible oxygen barrier filling mud of ceramic fireproof minerals, the material
Under conventional environment, there is good flexibility, the bending for not influencing cable uses, once it will be burnt under flame combustion
Erosion becomes ceramics makeup hard shell, can effectively prevent inside the further ablation cable of flame, be the maximally efficient fire screen of cable
Barrier；The oversheath of cable uses high flame resistance, low smoke halogen-free polyolefin material, and oxygen index (OI) reaches 35% or more and nonflammable
Low smoke and zero halogen material is capable of the sprawling of effective fire-retardant flame under flame condition；The utility model passes through setting the first fire prevention packet
The combination formation synthesis of belt, the second fire prevention belting layer, refuge floor and a few road fire proof constructions of glass fiber gasket for packing is prevented
Fiery barrier can effectively prevent inside the radial penetration ablation cable of flame, especially cause the combustion of internal crosslinking polyethylene insulation
It burns, while flame can effectively be prevented longitudinally to spread, form burning gallery.In short, being fully able to pass through using the cable of the design
Fire-retardant B1 rank combustion test as defined in GB31247-2014, the sample is detected through authoritative institution at present, and flame retardant property meets
The requirement of B1 combustion test.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
Utility model is described further below by way of specific embodiment, and in conjunction with attached drawing.
A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable as shown in Figure 1, including cable core, the cable core by
Three power wire cores, a neutral core, a piece-root grafting wire core are twisted to be integrated gap location filling rear and between each core
Glass silk fiber rope 5 forms, it is desirable that the gap being full of between core that packing material must be closely knit guarantees that air-flow is not in burning
It can quickly be flowed along cable core, while fill outer diameter and should be greater than calculating outer diameter 2-4mm, guaranteed that packing material wraps up insulated wire cores, prevent
Only inflammable crosslinked polyetylene insulated conflagration, causes hot release value exceeded；
The structure of the power wire core, neutral core and ground connection core is identical, by conductor 1, the cloud outside conductor
Master tape fireprotection layer 2, the crosslinked polyetylene insulated layer 3 being extruded in outside mica tape fireprotection layer and around crosslinked polyetylene insulated layer
Outer glass fiber band fireprotection layer 4 is constituted；
Wrapped first fire prevention belting layer 6 and the second fire prevention belting layer 8, anti-in the first fire prevention belting layer and second outside cable core
Refuge floor 7 is extruded between fiery belting layer, extrudes high flame resistance, low smoke halogen-free polyolefin oversheath 9 outside the second fire prevention belting layer.
A kind of production method of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable, the specific steps are as follows:
1) first stage, conductor is using the 2nd class stranded conductor for meeting GB/T3956-2008, and conductor production is by drawing
Silk-annealing-is twisted several stages, first passes through wire drawing machine for copper bar by multiple tracks wire drawing, specification silk, is drawing required for obtaining
While processed, annealing is realized；Then by specification silk by the radical of design, by stranding machine, hierarchical rule is twisted as design
Conductor；
2) the mica tape flame retardant coating of conductive surface is realized using wrapped technique, by winding machine, mica tape is uniform
Overlapping is around conductive surface；
3) production of crosslinked polyetylene insulated layer is to be realized by extruding machine, using the technique extruded by granular friendship
Connection polythene material is heated to be molten condition by extruding machine, then is transported to head by the rotation of screw rod, passes through matching for mold
Conjunction uniformly extrudes conductive surface, production process main technologic parameters: extrusion temperature: 120-160 DEG C of feeding section；Compression section 170-
185℃；185-210 DEG C of homogenizing zone, extrusion way squeezes tubular type using half；
4) second stage: being overlapped wrapped one layer of glass fiber fireprotection layer on insulated wire cores surface, the process be by around
Chartered plane is realized, is that single overlays are wrapped around packet mode, overlap rate general control is prepared into three power lines between 20%-30%
Core, neutral core and ground connection core；
5) phase III: for cabling process, will be twisted around the insulated wire cores wrapped by cabling device as an entirety,
While twisted among the gap of core, glass fiber gasket for packing is added, at the same have to ensure to fill it is closely knit, it is full,
Ensure that packing material wants fully wrapped around firmly insulated wire cores, while in the wrapped one layer of glass tape fireprotection layer in surface layer；Production process
Main technologic parameters: laying up pitch controls between 30-50 times, and stranding wire parallel module calculates the big 2-4mm of outer diameter compared with stranding, and filling is answered
It is closely knit full, it is ensured that air is unable to smooth flow between longitudinal cable core, and packing material is made to wrap up core, and formation has core
Effect protection；
6) fourth stage: for the production of refuge floor, the production of the process is realized using rubber technique is squeezed；Fire insulation layer material is made pottery
The flexible oxygen barrier filling mud of porcelain chemoprevention fire refractory mineral matter is uniformly extruded in cable core surface by rubber extruding machine, then passes through vulcanization again
Pipeline, the vapor through high temperature and pressure is vulcanized, then is shaped through cooling water；Main technologic parameters and broad outlines are as follows: entire
Each area of rubber extruding machine not heat, and ensure that each area's cooling water is abundant, eliminate the heat generated by screw rod rotation in time, prevent
There is the case where incipient scorch, Steam pressure control notices that lower closed glue pad size relatively produces traditional rubber between 0.8-1.1MPa
Big 20mm of cable or so prevents product to be scraped off when going out lower closing；
7) the 5th stage: the production of fireprotection layer outside refuge floor, using glass fiber band be overlapped it is wrapped by the way of realize,
There is lapping equipment completion, overlapping overlap rate control is between 20-30%.
8) the 6th stage: the production of outer jacket is realized by the way of extrusion molding, is completed by extruding machine；By plastic pellet
Extruding machine is added by barrel, then by heating, converts molten condition for solid particle, is conveyed by the rotation of screw rod
To head, cable core surface is uniformly extruded in by the cooperation of mold.The main technological parameter of the process are as follows: extrusion temperature are as follows:
90-110 DEG C of feeding section；120-140 DEG C of compression section；Homogenizing zone: 140-155 DEG C, extrusion screw rod using low compression ratio it is equidistant not
Deng deep screw rod, for compression ratio in 1.1-1.3 or so, extrusion way squeezes tubular type using half, and draw ratio matches module system between 3.0-6.5
Number is between 1.0-1.05, or uses squash type.
The above is only the preferred embodiment of the utility model.It should be pointed out that for the ordinary skill people of this field
For member, under the premise of not departing from this utility model principle, several variations and modifications can also be made, these also should be regarded as
Belong to the protection scope of the utility model.
Claims (4)
1. a kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable, which is characterized in that including cable core, the cable core by
Three power wire cores, a neutral core, a piece-root grafting wire core are twisted to be integrated gap location filling rear and between each core
Amount is formed beyond the glass silk fiber rope of cable core diameter 2-4mm；Wrapped first fire prevention belting layer and the second fire prevention packet outside cable core
Belt extrudes refuge floor between the first fire prevention belting layer and the second fire prevention belting layer, extrudes height outside the second fire prevention belting layer
Flame-retardant low-smoke halogen-free polyolefin oversheath.
2. a kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable according to claim 1, it is characterised in that: described
The structure of power wire core, neutral core and ground connection core is identical, by conductor, the mica tape fireprotection layer outside conductor, squeezes
Wrap the crosslinked polyetylene insulated layer outside mica tape fireprotection layer and the glass fiber outside crosslinked polyetylene insulated layer
Band fireprotection layer is constituted.
3. a kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable according to claim 1, it is characterised in that: described
First fire prevention belting layer and the second fire prevention belting layer are flame resistant glass silk fiber band.
4. a kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable according to claim 1, it is characterised in that: described
Refuge floor be the flexible oxygen barrier filling mud of ceramic fireproof minerals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821701174.0U CN208873501U (en) | 2018-10-19 | 2018-10-19 | A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821701174.0U CN208873501U (en) | 2018-10-19 | 2018-10-19 | A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208873501U true CN208873501U (en) | 2019-05-17 |
Family
ID=66470517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821701174.0U Active CN208873501U (en) | 2018-10-19 | 2018-10-19 | A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208873501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346218A (en) * | 2018-10-19 | 2019-02-15 | 无锡市明珠电缆有限公司 | A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable and its production method |
-
2018
- 2018-10-19 CN CN201821701174.0U patent/CN208873501U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346218A (en) * | 2018-10-19 | 2019-02-15 | 无锡市明珠电缆有限公司 | A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable and its production method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109346218A (en) | A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable and its production method | |
| CN104319004B (en) | Damp-proof corrosion-resistant inflaming-retarding electric power communication cable | |
| CN102568691A (en) | Environment-friendly mid-voltage fire resistant cable | |
| CN106448796B (en) | A kind of track traffic flame-retardant insulation DC electric cable and manufacturing system and method | |
| CN201611593U (en) | Mining power cable | |
| CN202258471U (en) | Environment-friendly fire-proof medium-voltage cable | |
| CN205751652U (en) | A kind of Novel fire-resistant controls cable | |
| CN105405524A (en) | Fire-resistant optical fiber composite medium-voltage cable and manufacturing process of fire-resistant optical fiber composite medium-voltage cable | |
| CN202796113U (en) | Fire-insulating type low-smoke and halogen-free fire-resisting cable | |
| CN204732216U (en) | A kind of novel environment friendly halogen, low smoke A-class flame subway main line power cable | |
| CN103811118A (en) | Medium voltage fire resistant cable for airport terminal | |
| CN208873501U (en) | A kind of fire-retardant B1 type fire resisting low smoke and zero halogen twisted polyethylene cable | |
| CN205177474U (en) | Fire -resistant power cable of cross -linked insulation | |
| CN203966654U (en) | Ceramic silicon rubber frequency-changing cable | |
| CN202502825U (en) | Environment-friendly medium-voltage fireproof cable | |
| CN204651023U (en) | The halogen-free flameproof fireproof cable of modified node method | |
| CN205376186U (en) | Fine compound medium voltage cable of resistant firelight | |
| CN107945964A (en) | Pressure crosslinking flexible fire-proof cable in environmentally friendly heat insulation type metal steel sheath | |
| CN208970199U (en) | It is a kind of bilayer crosslinked with silicane copper strips always shield steel wire woven armored converter cable | |
| CN202549472U (en) | Fire-resistant power cable | |
| CN207337997U (en) | A kind of resistance to spray can ceramic fire-resisting cable | |
| CN208111161U (en) | A kind of LSOH anti-flaming B1 grades of communication cables | |
| CN202930100U (en) | Airport terminal medium voltage fireproof cable | |
| CN206907543U (en) | A kind of environmental protection flame retardant waterproof optical fiber composite low-voltage cable | |
| CN207116083U (en) | A kind of fire-retardant anticorodal aluminium alloy cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |