CN209641404U - A kind of low release safety cable of the high fire-retardance of fire insulation heat insulation structural - Google Patents

Abstract

The utility model discloses a kind of low release safety cables of the high fire-retardance of fire insulation heat insulation structural, belong to technical field of electric wires and cables.A kind of low release safety cable of high fire-retardance of fire insulation heat insulation structural of the utility model, including insulated wire cores, stranding, thermal insulation layer, refuge floor, oversheath.It is characterized by: the insulated wire cores are made of conductor, insulating layer；The stranding is that certain twisting pitch is twisted into a cable core entirety to all insulated wire cores according to a certain direction, and is subject to high fire-retardance gasket for packing in cable core gap.The thermal insulation layer is that the glass fibre band overlapping of high fire-retardance is wrapped, and the refuge floor is that the gold mica tape overlapping of high temperature resistant fire resisting is wrapped, and the oversheath is the low-smoke and halogen-free flame retardant polyolefin jacket material of high fire-retardance.

Description

A kind of low release safety cable of the high fire-retardance of fire insulation heat insulation structural

Technical field

The utility model relates to cable production arts, are a kind of low release safety cable of high fire-retardance of fire insulation heat insulation structural Structure design.

Background technique

Since 2014, European Union planned indoor electric power, communication, control cable to receive just in building laws The release of fireproofing of cable performance and harmful substance is asked all to have to comply with EU criteria.Meanwhile domestic Ministry of Public Security Sichuan fire house Joint bid committee is proposed GB 31247-2014, carries out classification system for fire performance for cable and optical cable.The standard and EN50575 It is equivalent, domestic market is impacted very big.By examining propagation of flame height, heat release rate peak value, hot total volume, burning Growth rate index produces cigarette rate peak value, produces the burnings of the indexs to cable such as cigarette total amount, smoke density, Vertical Flame sprawling height Performance carries out overall merit.

Regulation in new edition " design of civil buildings specification ": super high-rise building should select B1 grades of combustibility or more, The electric wire and cable that toxicity of tobacco production is t0 grades, density flaming droplet/particulate class is d0 grades；First class high storey building and densely populated place Public place should select B1 grades of combustibility, toxicity of tobacco production for t1 grades, the wire and cable that density flaming droplet/particulate class is d1 grades Requirement.

State Intellectual Property Office disclosed Publication No. 2 106409416A on February 15th, 2017, entitled The inventing type patent of " a kind of high fire-retardance fire resisting low-smoke halogen-free cable electric wire and its preparation process ", the invention discloses a kind of high Flame-retardant low-smoke halogen-free cable electric wire, including at least one cable core, all cables core form the total core of one cable, and wrap It overlays in low-smoke halogen-free flame-retardant sheath, the cable core is by conductor, XLPE insulating layer, flame retardant coating, halogen-free flame retardant insulation layer group At the conductor is coated in XLPE insulating layer, and the XLPE insulating layer is coated with flame retardant coating, outside the flame retardant coating Be coated with halogen-free flame retardant insulation layer week, the total core external spiral of the cable is wound with low-smoke non-halogen flame-retardant band, the low cigarette without Halogen inhibiting tape is coated in low-smoke halogen-free flame-retardant sheath.Though a kind of high fire-retardance fire resisting low-smoke halogen-free cable electric wire provided by the invention So generated without pernicious gas and corrosive gas, smoke amount is few, has high insulation high fire-retardance effect, meets RoHS standard, have Higher environmental-protecting performance.But amount of heat can be discharged when burning, there is combustion-supporting influence of burning to ambient enviroment, is unsatisfactory for fire-fighting To the requirement of cable secure in practical fire.

Utility model content

The purpose of this utility model is to be to overcome above-mentioned technological deficiency, and the utility model provides a kind of fire insulation heat insulation structural The low release safety cable of high fire-retardance, the fireproofing of cable grade meet European Union CPR certification regulation EN 50575 in B2ca grade It is required that the cable belongs to safety cable relative to traditional flame retardant cable, resistance to burning degree, the combustion of cable body are not only examined The release of smoke amount and corrosive gas when burning will more examine the influence degree to environment in combustion, pass through examination Heat that cable discharges in combustion, heat release rate produce cigarette total amount, produce cigarette rate, fire growth rate etc. and The high fire-retardance security performance of comprehensive examination cable.

The cable have high fire-retardance low-heat release performance, from traditional flame propagation, sprawling performance, low cigarette without Research in terms of halogen is transferred in practice, and direct dummycable actually uses situation, and refinement fire-fighting is right in practical fire The requirement of all concerns of cable products further refines heat emission characteistics.The high fire-retardance low emission of the cable can be embodied in Propagation of flame height FS≤1.5m when being able to satisfy burning, heat release rate peak value HRR≤30kW, hot total volume THR₁₂₀₀≤ 15MJ, fire growth rate index FIGRA≤150W/s produce cigarette rate peak value SPR≤0.25m²/ s produces cigarette total amount TSP₁₂₀₀≤ 50m², smoke density It >=60%, the index of Vertical Flame sprawling distance H≤425mm.

In order to realize above-mentioned technical indicator, the utility model is achieved through the following technical solutions:

A kind of low release safety cable of the high fire-retardance of fire insulation heat insulation structural, including insulated wire cores, stranding, thermal insulation layer, fire insulation Layer, oversheath.It is characterized by: the insulated wire cores are made of conductor, insulating layer；The stranding be all insulated wire cores according to The certain twisting pitch in certain direction is twisted into a cable core entirety, and is subject to high fire-retardance gasket for packing in cable core gap.It is described Thermal insulation layer be high fire-retardance glass fibre band overlapping it is wrapped, the refuge floor be high temperature resistant fire resisting gold mica tape overlapping around Packet, the oversheath are the low-smoke and halogen-free flame retardant polyolefin jacket material of high fire-retardance.

The conductor is twisted and is constituted by single solid core copper wire or more copper wires, and outermost layer direction of lay is left-hand, Adjacent layer is opposite.

The insulating layer is to extrude crosslinked polyethylene.

The insulated wire cores are made of conductor, insulating layer.

The stranding be by all insulated wire cores according to a certain direction, twisting pitch be twisted, twisting pitch is cable 16~50 times of core diameter.And it is subject to high fire-retardance gasket for packing in cable core gap, keep cable core rounding close, no air flow channel improves Flame retardant property.

The thermal insulation layer is that will be insulated using the glass fibre band with a thickness of 0.25mm, the high fire-retardance of 18~80mm of width Core and inflaming retarding high-temperature gasket for packing tighten, and form the close cable core entirety of a rounding, overlap rate 15%~30%.

The refuge floor be using with a thickness of 0.14mm, the gold mica tape overlapping of the high temperature resistant fire resisting of 10~80mm of width around It wraps, overlap rate 20%~30%.

The oversheath is the low-smoke and halogen-free flame retardant polyolefin jacket material of high fire-retardance, which not only can guarantee that cable exists When by flame impingement, it can expand rapidly and be sintered to form one layer of hard shell, so as to protection cable built-in electrical insulation and flammable Object, internal temperature will not be too high when making cable fire, and then the effect of reach anti-flaming thermal-insulation fire resisting.Also ensure that cable is being installed Mechanical resistant performance, ageing-resistant performance, the termite-resistant rodent-resistant performance of operation.

Compared with prior art, brought beneficial technical effect is shown the utility model:

1, oversheath uses the low-smoke and halogen-free flame retardant polyolefin jacket material of high fire-retardance, the material combustion calorific value≤13 MJ/ kg.When cable is when by flame impingement, a large amount of calorific values will not be not only discharged, but also can expand rapidly and be sintered to form one layer of heavily fortified point Hard shell so as to protection cable built-in electrical insulation and combustible, and then reaches the heat-insulated effect of cable-flame retardant,

2, gold mica tape of the refuge floor using high temperature resistant fire resisting, the material combustion calorific value about 1.5-2.5MJ/kg, not only not A large amount of calorific value can be discharged, and can effectively resist the impact of flame, when ignition temperature reaches 800 DEG C, knot can be released Brilliant water, effective protection cable built-in electrical insulation and combustible.

3, the cable has a security performance of high fire-retardance low-heat release, and propagation of flame height FS when being able to satisfy burning≤ 1.5m, heat release rate peak value HRR≤30kW, hot total volume THR₁₂₀₀≤ 15MJ, fire growth rate index FIGRA≤ 150W/s produces cigarette rate peak value SPR≤0.25m²/ s produces cigarette total amount TSP₁₂₀₀≤50m², smoke density I_t>=60%, Vertical Flame is climing Prolong distance H≤425mm.

Detailed description of the invention

Fig. 1 is the cross section structure schematic diagram of the utility model.

Attached drawing 1 marks: 1, conductor, 2, insulating layer, 3, stranding, 4, thermal insulation layer, 5, refuge floor, 6, oversheath.

Specific embodiment

Embodiment 1

As one preferred embodiment of the utility model, referring to Figure of description 1:

Shown in a kind of low release safety cable of the high fire-retardance of fire insulation heat insulation structural, mainly filled out by conductor, insulating layer, stranding It fills, thermal insulation layer, refuge floor, oversheath composition.The conductor is nominal area of section 50mm²Copper conductor twisted constitute；It is described exhausted Edge layer is to extrude crosslinked polyethylene composition, and insulate nominal thickness 1.0mm；It is above to constitute insulated wire cores.The stranding is thoroughly done away with 5 Edge core is twisted according to dextrad, 40 times that twisting pitch is cable core diameter, and is subject to the high fire-retardance of φ 8mm in cable core gap Gasket for packing keeps cable core rounding close, no air flow channel, improves flame retardant property, and the thermal insulation layer is to adopt outside cable core after stranding It is 60mm with width, with a thickness of wrapped one layer of the high fire-retardance glass fibre band overlapping of 0.25mm, overlap rate 20%.The fire insulation Layer is using with a thickness of 0.14mm, and the gold mica tape overlapping of the high temperature resistant fire resisting of width 60mm is around double-baging, overlap rate 25%.Institute Stating external sheath layer is to extrude low-smoke and halogen-free flame retardant polyolefin jacket material composition, sheath nominal thickness 1.8mm.Technique production Product does heat release combustion test, and measured propagation of flame height FS is 0.61m, and heat release rate peak value HRR is 11.7kW, heat Total volume THR₁₂₀₀It is 37.3W/s for 9.9MJ, fire growth rate index FIGRA, production cigarette rate peak value SPR is 0.05m²/ S produces cigarette total amount TSP₁₂₀₀For 2.8m², smoke density It is 78%, and it is 306mm that Vertical Flame, which spreads distance H,.

Embodiment 2

As one preferred embodiment of the utility model, referring to Figure of description 1:

Shown in a kind of low release safety cable of the high fire-retardance of fire insulation heat insulation structural, mainly filled out by conductor, insulating layer, stranding It fills, thermal insulation layer, refuge floor, oversheath composition.The conductor is nominal area of section 1.5mm²Copper conductor twisted constitute；It is described exhausted Edge layer is to extrude crosslinked polyethylene composition, and insulate nominal thickness 0.7mm；It is above to constitute insulated wire cores.The stranding is thoroughly done away with 5 Edge core is twisted according to dextrad, 20 times that twisting pitch is cable core diameter, and is subject to the high fire-retardance of φ 2mm in cable core gap Gasket for packing keeps cable core rounding close, no air flow channel, improves flame retardant property, and the thermal insulation layer is to adopt outside cable core after stranding It is 25mm with width, with a thickness of wrapped one layer of the high fire-retardance glass fibre band overlapping of 0.25mm, overlap rate 15%.The fire insulation Layer is using with a thickness of 0.14mm, and the gold mica tape overlapping of the high temperature resistant fire resisting of width 25mm is around double-baging, overlap rate 28%.Institute Stating external sheath layer is to extrude low-smoke and halogen-free flame retardant polyolefin jacket material composition, sheath nominal thickness 1.2mm.Technique production Product does heat release combustion test, and measured propagation of flame height FS is 0.73m, and heat release rate peak value HRR is 21.1kW, heat Total volume THR₁₂₀₀It is 43.5W/s for 8.5MJ, fire growth rate index FIGRA, production cigarette rate peak value SPR is 0.07m²/ S produces cigarette total amount TSP₁₂₀₀For 4.2m², smoke density It is 84%, and it is 288mm that Vertical Flame, which spreads distance H,.

Claims (4)

1. a kind of low release safety cable of the high fire-retardance of fire insulation heat insulation structural, it is characterised in that: it include insulated wire cores, stranding, Thermal insulation layer, refuge floor, oversheath；The insulated wire cores are made of conductor (1), insulating layer (2)；The conductor (1) is by single Solid core copper wire or the twisted composition of more copper wires, outermost layer direction of lay is left-hand, and adjacent layer is opposite；The insulating layer (2) For the single layer dielectrics for extruding crosslinked polyethylene；The stranding (3) be by two cores and the above insulated wire cores according to a certain direction, twist It closes pitch to be twisted, twisting pitch is 16~50 times of cable core diameter, and is subject to high fire-retardance gasket for packing in cable core gap.

2. the low release safety cable of a kind of high fire-retardance of fire insulation heat insulation structural as described in claim 1, it is characterised in that: described Thermal insulation layer (4) is using with a thickness of 0.25mm, and the glass fibre band of the high fire-retardance of 18~80mm of width is by insulated wire cores and resistance Combustion high temperature packing rope tightens, and forms the close cable core entirety of a rounding, overlap rate 15%~30%.

3. the low release safety cable of a kind of high fire-retardance of fire insulation heat insulation structural as described in claim 1, it is characterised in that: described Refuge floor (5) is using with a thickness of 0.14mm, and the gold mica tape overlapping of the high temperature resistant fire resisting of 10~80mm of width is wrapped to be formed, and is taken Lid rate 20%~30%.

4. the low release safety cable of a kind of high fire-retardance of fire insulation heat insulation structural as described in claim 1, it is characterised in that: described Oversheath (6) is the low-smoke and halogen-free flame retardant polyolefin jacket material of high fire-retardance, oxygen index (OI) 36%~40%.