CN107945964A - Pressure crosslinking flexible fire-proof cable in environmentally friendly heat insulation type metal steel sheath - Google Patents
Pressure crosslinking flexible fire-proof cable in environmentally friendly heat insulation type metal steel sheath Download PDFInfo
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- CN107945964A CN107945964A CN201711276492.7A CN201711276492A CN107945964A CN 107945964 A CN107945964 A CN 107945964A CN 201711276492 A CN201711276492 A CN 201711276492A CN 107945964 A CN107945964 A CN 107945964A
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- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
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- 229910003978 SiClx Inorganic materials 0.000 description 1
- FRIKWZARTBPWBN-UHFFFAOYSA-N [Si].O=[Si]=O Chemical compound [Si].O=[Si]=O FRIKWZARTBPWBN-UHFFFAOYSA-N 0.000 description 1
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1895—Internal space filling-up means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Abstract
The invention discloses pressure crosslinking flexible fire-proof cable in a kind of environmentally friendly heat insulation type metal steel sheath, technical problems to be solved are to provide that a kind of fire protecting performance is good, the approximate outside diameter of cable is small, lightweight construction, mounting and installation are convenient, and transition joint, terminal fitting are simple and efficient, pressure crosslinking flexible fire-proof cable in non-maintaining environmentally friendly heat insulation type metal steel sheath.In order to solve the above technical problems, the present invention uses following technical scheme：Pressure crosslinking flexible fire-proof cable in a kind of environmental protection heat insulation type metal steel sheath; including conductor; insulated wire cores are formed after the conductor outsourcing insulating layer coating; cable core internal clearance after insulated wire cores combination stranding is filled with filled layer, and fire lagging, thermal insulation layer, liner layer, protective layer and outer jacket are coated with successively outside cable core.Compared with prior art, the present invention being not provided with the wrapped flame retardant coating of mica outside cable conductor core, but fire-retardant, fireproof construction is set outside cable core, and reaches anti-spray, anti-mechanical impact performance requirement, realizes fire resistance property.
Description
Technical field
The present invention relates to pressure crosslinking flexible fire-proof cable in a kind of environmentally friendly heat insulation type metal steel sheath.
Background technology
In recent years, with the high speed development of social economy, the increasingly quickening of Development of China's Urbanization, urban architecture electrical domain
Security against fire problem becomes increasingly conspicuous, and the effect of flame retardant type, fire safe type and fireproof cable is more and more important, especially in large-scale public affairs
The application in building of building together increasingly is popularized.Common flame retardant cable has pvc sheath flame retardant cable and LSOH anti-flaming
Polyolefin jacket flame retardant cable, common fire-resisting cable have Mica tape polyvinyl chloride insulation or crosslinked polyetylene insulated fire resisting
Cable, common fireproof cable have oxidation magnesium mineral insulation copper sheath fireproof cable and aluminium sheath continuously to extrude fireproof cable.It is fire-retardant
The structure and common cable of cable are essentially the same, and difference is that outer jacket uses the sheath material of fire-retardant classification.Flame proof electrical
Difference lies in set the flame retardant coating formed by Mica tape, be somebody's turn to do the structure and common cable of cable between conductor and insulation
Flame retardant coating has certain fire-resistance property.Fireproof cable is a kind of safety-type cable of excellent performance, by copper conductor, inorganic oxide
Magnesium insulate and copper sheath three's Combined machining forms, or by copper conductor, the wrapped and continuous extrusion aluminium sheath Combined machining of mica
Form.
Since medium-pressure power cable is run at higher voltages, common voltage grade is 3.6/6kV to 26/35kV, electrically
Insulation performance requires insulated wire cores must be by conductor wire core, peroxide crosslinked polyethylene insulating layer (comprising inner shield, external screen
Cover, metallic shield) composition.Therefore pressure crosslinking fireproof cable in, it is impossible to common mode is taken, the wrapped mica tape on conductor, even
It is continuous to extrude aluminium sheath mode；Magnesium oxide mineral insulation copper sheath mode can not be taken, fire resistance property is realized, reaches fire protecting performance
It is required that.
Based on security consideration, in emphasis public building place, the middle pressure cross-linked power cable of laying is, it is necessary to occur fire
Under emergency situation, in certain time, cable can ensure that power transmission and communication system are unimpeded.Common flame retardant cable, it is impossible to full
Sufficient safety and environmental protection requirement.Common fire-resisting cable, once cable meets fire burning, keep that the integrality of circuit relies on is mica tape,
And fire-resisting cable stability is very poor, mica tape is easier to absorb the moisture and moisture in air, during fire control and disaster rescue, runs into high pressure
Hydraulic giant sprays, and mica once makes moist, and volume resistivity decline is very fast, can cause very serious consequence.Mineral insulated cable
Prevent fires although having, is explosion-proof, corrosion-resistant, the characteristic such as mechanical strength height, cannot be designed and manufactured into midium voltage cable, and cable
Costly, manufacturing process is complicated, and production length is short, and transition joint, terminal attachment polylinker are cumbersome for cost, safeguards fiber crops in the future
It is tired, it is not suitable for being widely popularized use.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of fire protecting performance is good, the approximate outside diameter of cable is small, lightweight construction,
Mounting and installation is convenient, and transition joint, terminal fitting are simple and efficient, press and hand in non-maintaining environmentally friendly heat insulation type metal steel sheath
Join flexible fire-proof cable.
In order to solve the above technical problems, the present invention uses following technical scheme：In a kind of environmental protection heat insulation type metal steel sheath
Pressure is crosslinked flexible fire-proof cable, including conductor, forms insulated wire cores after the conductor outsourcing insulating layer coating, insulated wire cores are combined into
Cable core internal clearance after cable is filled with filled layer, and fire lagging, thermal insulation layer, liner layer, protection are coated with successively outside cable core
Layer and outer jacket.
Insulating layer of the present invention is peroxide crosslinked polyethylene insulating layer.
Filled layer of the present invention is flame-proof silicon rubber rope.
Fire lagging of the present invention is four layers of wrapped high flame retardancy silicon rubber composite band, and wrapped Duplication is not less than
30%, volume resistivity is not less than 1 × 1015Ω.cm。
Thermal insulation layer of the present invention is fire-resisting ceramic silicone rubber, and tensile strength is not less than 8.0Mpa, and elongation is not less than
300%, volume resistivity is not less than 1 × 1015Ω.cm。
Liner layer of the present invention is ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, and the oxygen index (OI) of its material is not less than
35。
Protective layer of the present invention is the stainless steel band lock armo protective metal shell of 0.5mm thickness.
Outer jacket of the present invention is ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, and the oxygen index (OI) of its material is not less than
35。
Conductor of the present invention is twisted by single round copper wire.
Compared with prior art, the present invention the wrapped flame retardant coating of mica is not provided with outside cable conductor core, but outside cable core
Fire-retardant, fireproof construction is set, and reaches anti-spray, anti-mechanical impact performance requirement, realizes fire resistance property.By to filled layer,
Fire lagging, thermal insulation layer, liner layer, protective layer, the reasonable selection of outer sheath material and performance improvement, meet that environmental-protecting performance will
Ask.Meanwhile pass through stringent production and processing technology, it is ensured that cable is persistently powered 180 minutes, at 650 DEG C under 950 DEG C of flame
Under flame, shower water lasting energization in 15 minutes, under 950 DEG C of flame, rod iron hits 30 lasting energizations, meets that fire protecting performance will
Ask.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Embodiment
The invention will now be described in further detail with reference to the accompanying drawings：As shown in Figure 1, present invention environmental protection heat insulation type metal
Pressure crosslinking flexible fire-proof cable includes conductor 1 in steel sheath, and conductor 1 is twisted by single round copper wire.1 outsourcing insulating layer coating of conductor
Form insulated wire cores after 2, the cable core internal clearance after insulated wire cores combination stranding be filled with filled layer 3, and cable core coats successively outside
There are fire lagging 4, thermal insulation layer 5, liner layer 6, protective layer 7 and outer jacket 8.Wherein, insulating layer 2 is the poly- second of peroxide crosslinking
Alkene insulating layer.Filled layer 3 is flame-proof silicon rubber rope.Fire lagging 4 is four layers of wrapped high flame retardancy silicon rubber composite band, wrapped
Duplication is not less than 30%, and volume resistivity is not less than 1 × 1015Ω.cm.Thermal insulation layer 5 is fire-resisting ceramic silicone rubber, and stretching is strong
Degree is not less than 8.0Mpa, and elongation is not less than 300%, and volume resistivity is not less than 1 × 1015Ω.cm.Liner layer 6 is ceramic
Halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, the oxygen index (OI) of its material are not less than 35.Protective layer 7 is the stainless steel band of 0.5mm thickness
Lock armo protective metal shell.Outer jacket 7 is ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, and the oxygen index (OI) of its material is not less than
35。
The present invention includes following technical characterstic：
1st, the selection of structure design and manufacturing process
(1) environment-friendly cable manufacturing technology：
Cable each operation uses green material, rationally control cable in influence environmentally protective material and structure because
Element.By carrying out reasonable selection and performance to filled layer, fire lagging, thermal insulation layer, liner layer, protective layer, outer sheath material
Improve, wherein, filled layer is flame-proof silicon rubber gasket for packing, fire lagging is high flame retardancy silicon rubber composite band, thermal insulation layer is pottery
Porcelain fire-resistant silicon rubber material, liner layer are ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting jacket material, protective layer is interlocking
Armouring steel sheath, outer jacket are ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting jacket material, select environment-friendly materials and inorganic
Insulating materials.In the case of cable fire, pH value, electrical conductivity, light transmittance, smoke density, poisonous gas burst size meet environmental protection
The performance requirement of type cable, and cable craft is stablized, dependable performance, preferably meets people's centering pressure crosslinking fire resistant flexible
The environmental requirement of cable.
(2) fire-resisting cable structure
The fire resistance of cable product not fully depends on the flame retardant coating that Mica tape is formed, but depending on insulation
The structure design of fire-resistance property, material component and whole cable with sheath material, the present invention use fire-resisting ceramic silicone rubber
As thermal insulation layer, ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating as liner layer, lock armo steel sheath as protective layer,
Ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating combines to form fireproof construction as outer jacket, four, has abandoned traditional fire resisting
The construction of cable, so as to avoid the influence of mica tape quality and around-packing technology to fire-resisting cable performance.Fire-resisting ceramic silicone rubber
, can be with normal use, under high-temp combustion, still at a temperature of -60 DEG C -+250 DEG C with broad temperature use scope
Silica duricrust inorganic insulator can be formed on cable core surface, electrical insulation properties are very excellent；Ceramic low smoke, zero halogen hinders
Fire polyolefin flame retardant coating and be used as liner layer, under flame condition, be adhering closely to cable surface, form fine and close inorganic duricrust,
Play the role of good heat-insulated oxygen barrier；Lock armo steel sheath can not only be used for protective layer, prevent mechanical external force from damaging, lock armo
Afterwards, it is coated togather with liner layer material tight, also may be combined to form thermal insulation layer, the fusing point of stainless steel material reaches 1500 DEG C,
Under high-temp combustion, heat is effectively prevented to polymeric inner transmission；Ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting outer jacket
Under the conditions of sustained combustion, sheath material porcelain and cable surface is adhering closely to without molten drop, the duricrust for forming densification is inorganic
Body, plays the role of good heat-insulated oxygen barrier, can effectively block burning things which may cause a fire disaster, protect the integrality of cable run.
Using fire-resisting ceramic silicone rubber thermal insulation layer, ceramic halogen-free and low-smoke flame-retardant polyolefin refractory lining layer, interlocking armour
Steel loading sheath protective layer and ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting outer jacket, four combine to form fireproof construction, even if
Under 950 DEG C of flame condition, after 180 minutes, cable remains to keep the integrality of circuit, isolated insulation layer and its melting
Product is in contact with external flame, and isolation heat internally transmits, and prevents insulating layer from continuing temperature rise.Fire-resisting cable combining structure
Design, finally plays protection insulating layer and is difficult to melt, is burned, it is ensured that cable maintains the normal of a period of time under high-temp combustion
Work.
(3) high flame-retardant cable structure
Traditional extrudes high fire-retardance separation layer, oxygen barrier layer cable, mixed plus water solubility because it is excessive to extrude material oxygen index (OI)
Polymer resin easily hardens, poor processability, normally can not continuously extrude.The present invention uses high flame retardancy silicon rubber composite band material,
Higher oxygen index (OI) material forms band, easy to process, is coated on outside cable core and forms fire lagging, and uses flame-proof silicon rubber
Rope is filled, both integrate fire-retardant, heat absorption, oxygen barrier, effectively increases the high flame-retardant property of cable, while liner layer,
Outer jacket uses ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating.
The present invention fire retardant mechanism be：Outer jacket forms duricrust inorganic body under flame condition, in cable outer layer porcelainization；Protect
Sheath is made of metal material, is played and is prevented the sprawling of flame inner layer and shock resistance protective effect；Liner layer using ceramic without
Halogen low-smoke flame-proof polyolefin flame retardant coating, further prevents the sprawling of flame heat regulating inner layer；Thermal insulation layer is using the ceramics specially developed
Change insulating layer material, which can form a not molten non-ignitable complete silicon dioxide silicon duricrust, prevent flame, oxygen at high temperature
Further being spread to cable inside, while moisture can be discharged, moisture evaporation absorbs heat, and cooling effect is played to cable, so that
Within a certain period of time from cable surface to being internally formed temperature gradient；Fire lagging uses high flame retardancy silicon rubber composite band, high
Flame-proof silicon rubber composite band under flame condition, is formed with silica using having excellent fire resistance on cable core surface
For the duricrust inorganic insulator of main body, high temperature is prevented to be delivered to insulating layer, filled layer uses flame-proof silicon rubber gasket for packing, not only resistance to
Temperature, and prevent flame from forming chimney effect by cable core gap, avoid propagation of flame.
The optimization and upgrading to cable fire structure, flame retarding construction more than, to the reasonable selection and performance improvement of material,
Comprehensive flameproof effect is formed, finally realizes fire resistance property, meets fire protecting performance requirement.
(4) fireproofing technique class requirement
The present invention reaches anti-spray, anti-mechanical impact performance by the optimization and upgrading to cable fire structure, flame retarding construction
It is required that realize excellent fire resistance property.By to filled layer, fire lagging, thermal insulation layer, liner layer, protective layer, outer jacket material
The reasonable selection and performance improvement of material, filled layer is flame-proof silicon rubber gasket for packing, fire lagging is that novel flame-retardant silicone rubber is answered
Crossed belt, thermal insulation layer are fire-resisting ceramic silicone rubber, liner layer is ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, protective layer is
Lock armo steel sheath, outer jacket are ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, by stringent manufacturing processing technic,
Cable craft is stablized, dependable performance, preferably meets the requirement of the security performance of people's centering pressure fireproof cable.Cable exists
Under 950 DEG C of flames, persistently it is powered 180 minutes (simple fire resisting C), under 650 DEG C of flame, shower water lasting energization in 15 minutes is (resistance to
Fiery water spray W), under 950 DEG C of flame, rod iron hits 30 lasting energizations (fire resisting impact resistance Z), and Britain BS6387 is fully achieved
《The performance requirement of the cable of circuit integrality is kept under Fire Conditions》CWZ fire protecting performances test request as defined in standard.
2nd, material type selecting
(1) high flame retardancy silicon rubber composite band fire lagging material
High flame retardancy silicon rubber composite band material, be by high flame retardancy silicon rubber and temperature resistant glass fiber cloth calendering it is compound and
Into tensile strength is not less than 5.0Mpa, and tearing strength is not less than 25kN/m, and volume resistivity is not less than 1 × 1015Ω .cm,
Crust rapidly under 650 DEG C and above flame or nonflame hot conditions, start to be hardened, and do not fallen off after sintering, fire resistance reaches
V-1 technical requirements.High flame retardancy silicon rubber composite band at the same time, has certain elasticity and good airproof performance, and it is longer to burn the time, burns
When temperature is higher, housing is harder, and fire prevention isolation effect is better.The stabilization of material property ensure that cable energy under flame temperature
It is enough to work normally for a long time.
(2) fire-resisting ceramic silicone rubber insulating layer material
Fire-resisting ceramic silicone rubber is a kind of novel high polymer composite fire-proof material, its material of main part is high temperature silicone rubber
(HTV), the tensile strength of material is not less than 8.0Mpa, and elongation is not less than 300%, and volume resistivity is not less than 1 × 1015Ω
.cm, fire-resisting ceramic silicone rubber is not melted under 650-1300 DEG C of flame condition, not dripped, and is burnt rapidly under flame
To form ceramic-like duricrust, protect internal cable core, shell has larger mechanical strength, can bear certain mechanical impact force, while because
There is excellent hydrophobicity for raw rubber used in fire-resisting ceramic silicone rubber and filler, its hydroscopicity is at a fairly low, even if it is exterior by
Still there are excellent electrical insulation properties, it is ensured that cable keeps the normal work of a period of time under high-temp combustion in the case of tide.
(3) lock armo steel sheath protective layer material
Cable armouring is often overlapping around double-baging with galvanized steel strip gap, and power cable bending radius requires, multicore armored type
For 12D, the non-armored type of multicore is 15D (D is the outside diameter of cable), is needed when because of mounting and installation, and whens curved transitions can cause steel coil strip
Side, is pricked into liner layer and insulation, and cable core is caused to damage.The present invention uses stainless steel belt, and the fusing point of stainless steel material is reachable
1500 DEG C, and roll forming interlock is used, interlocking is close, and continuous round and smooth, bending radius is small, minimum bending radius 7D
(D is the outside diameter of cable), can not only be used for protective layer, prevents mechanical external force from damaging；After lock armo, one is closely coated on liner layer
Rise, may be combined to form reinforcement thermal insulation layer.The critical control point of interlocking armor process is mould installation, the adjustment of guide plate angle, pinch roller
Adjust, caliber and pitch are set.
(4) ceramic halogen-free and low-smoke flame-retardant polyolefin refractory lining layer and outer sheath material
Common extrudes aluminium sheath fireproof cable, and outer sheath material uses thermoplastic halogen-free and low-smoke flame-retardant polyolefin sheathed material
Material, the present invention are had using ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting jacket material as liner layer and outer jacket, material：
A) excellent mechanical performance and electric property, dielectric strength is not less than 25kV/mm under room temperature, and volume resistivity is not small
In 1 × 1014Ω.cm；
B) excellent crust at temperature or flame condition of the cable more than 650 DEG C, can be quickly generated into porcelain performance
Whole ceramic-like housing, for stretch bending strength up to 10.0Mpa, dielectric strength is not less than 20kV/mm, volume resistivity not less than 5 ×
1013Ω.cm；
C) excellent fire insulation, under flame condition, the ceramic-like housing of generation does not crack cable, does not drip, removes
There is excellent electric property, also with good oxygen barrier heat insulation, can effectively heat-insulated thermal-flame to line-internal
Infringement, delay the decomposition of internal material, delay insulating layer to be melted under continuous high temperature, ensure circuit in case of fire, protect
The unimpeded of certain time is held, fire protecting performance is persistently reliable.
In conclusion the technical characterstic of the present invention is：
(1) structure
A) using fire-resisting ceramic silicone rubber thermal insulation layer, ceramic halogen-free and low-smoke flame-retardant polyolefin refractory lining layer, interlocking
Armouring steel sheath protective layer and thermal insulation layer, ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting outer jacket, four combine to be formed it is new
Type fire-resisting cable structure design；
B) it is coated on using high flame retardancy silicon rubber composite band material outside cable core and forms fire lagging, and uses fire-retardant silicon rubber
Glue rope is filled, while liner layer, outer jacket use ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting jacket material, formation
High flame-retardant cable structure design；
C) lock armo steel sheath forms the structure design of protective layer and thermal insulation layer.
(2) material
A) selection is heat-resisting, oxygen index (OI) is high, the superior high flame retardancy silicon rubber composite band fire lagging material of shelling performance；
B) Ceramics fire-resistant silicon rubber extrusion insulating layer material；
C) fire resisting, ceramic halogen-free and low-smoke flame-retardant polyolefin refractory lining layer, the outer jacket material of superior flame retardant property are selected
Material.
(3) processing technology
A) extrusion and sulfuration process of silicon rubber insulation；
B) lock armo processing technology；
C) ceramic halogen-free and low-smoke flame-retardant polyolefin refractory lining layer, the expressing technique of outer sheath material.
Advantages of the present invention includes：Using peroxide crosslinked polyethylene as insulating layer (comprising inner shield, external shield,
Metallic shield), it disclosure satisfy that requirements of the voltage class 3.6/6kV to 26/35kV medium-pressure power cables to electric insulation, insulated wire
Flame-proof silicon rubber gasket for packing, then wrapped high flame retardancy silicon rubber composite band fire lagging, then extrude ceramics are filled during core stranding
SiClx rubber thermal insulation layer, outside Ceramic silicon rubber thermal insulation layer, extrudes ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting sheath material
Material, lock armo steel sheath play certain protective effect, and strengthen heat-blocking action as protective layer and thermal insulation layer.Cable is most
Outer layer uses ceramic halogen-free and low-smoke flame-retardant polyolefin fire resisting outer sheath material, has high fire-retardance, fire resistance.
For whole cable because without using traditional fire-resisting cable structure and extruding oxygen barrier Rotating fields, cable approximation outside diameter is obvious
Reduce, and production easy to process.And by the optimization and upgrading to fireproof construction, flame retarding construction, reasonable selection and property to material
It can improve, form comprehensive fireproofing function, finally realize fire resistance property, meet fire protecting performance requirement.Therefore, cable of the invention exists
There is following distinguishing feature in performance：1) meet voltage class 3.6/6kV to 26/35kV medium-pressure power cables to electric insulation
Performance requirement；2) it is halogen-free, poisonous, pernicious gas and corrosive gas will not be produced under flame condition, it is free from environmental pollution；3)
Dependable performance, has excellent fire resistance property, meets the performance requirement of fireproof cable；4) process stabilizing, it is easy to process, produce work
Skill is easily controllable；5) soft, bending radius is small；6), cable approximation outside diameter is small, lightweight construction, and mounting and installation is more convenient；7)
Transition joint, terminal fitting are simple and efficient, exempt to safeguard in the future.
The embodiment of the present invention one：
The cable conductor of the present embodiment is formed by insulated wire cores stranding, cable core gap setting flame-proof silicon rubber rope filled layer,
Outside cable core successively wrapped high flame retardancy silicon rubber composite band fire lagging, be extruded with fire-resisting ceramic silicone rubber thermal insulation layer,
It is equipped with successively outside thermal insulation layer and extrudes ceramic halogen-free and low-smoke flame-retardant polyolefin refractory lining layer, stainless steel lock armo protective metal shell
Protective layer, the outermost layer of cable are extruded for ceramic halogen-free and low-smoke flame-retardant polyolefin refractory material.
1st, conductor uses 8.00 oxygen-free copper bars of Φ, is stretched by multiple tracks, is drawn into single round copper wire, after wire drawing and annealing, conductor
Take regular twisted, ensure that conductor structure is stablized, determine the pitch ratio of each stranded layer, ensure the bending property of conductor and close
Property.
2nd, insulating layer has excellent electrical insulation properties using peroxide crosslinked polyethylene as insulating materials.Really
Cable is protected to work normally under voltage levels.Insulated wire cores use colour code.
3rd, the cable core filled layer in the fire lagging after stranding uses high flame retardancy silicon rubber rope, ensures the rounding property of product
And high flame retardant.Gasket for packing proportion is small, is 1.40g/cm3, does not absorb water non-hygroscopic, and thermal conductivity is good, can in time radiate and reduce cable core
Internal accumulation of heat.
4th, the fire lagging after stranding, its cable core is wrapped to use high flame retardancy silicon rubber composite band, is coated on outside cable core, can
Form new high fire-retardance separation layer, under combustion case, duricrust inorganic insulator can be formed on cable core surface, isolation effect of preventing fires
It is good.
5th, thermal insulation layer is extruded using fire-resisting ceramic silicone rubber, has good processing performance, mechanical and physical performance and spy
Different shelling performance.Thermal insulation layer plays the role of isolating heat well, slow down heat transfer.Fire-resisting ceramic silicone rubber in high temperature or
Still there are excellent electrical insulation properties, it is ensured that cable is under high-temp combustion, in the case of outside makes moist, still keeps in the case of making moist
The normal work of a period of time.
6th, liner layer is extruded using ceramic halogen-free and low-smoke flame-retardant polyolefin refractory material, and new jacket material has density
Low, extrudable processing characteristics.Liner layer material has excellent crust into porcelain performance, and excellent fire insulation, also has very
Good oxygen barrier flame retardant effect, can infringement of the effectively heat-insulated thermal-flame to line-internal, delay the decomposition of internal material, delay
Insulating layer melts under continuous high temperature.
7th, protective layer uses stainless steel band lock armo, and the fusing point of stainless steel band uses interlocking armour up to 1500 DEG C
Dress mode, can not only be used for protective layer, prevent mechanical external force from damaging；It is tight with fire-resisting ceramic silicone rubber thermal insulation layer after lock armo
It is close to be coated togather, it also may be combined to form reinforcement thermal insulation layer.
8th, outer jacket is extruded using ceramic halogen-free and low-smoke flame-retardant polyolefin refractory material, and new jacket material has density
Low, extrudable processing characteristics.Outer sheath material has excellent crust into porcelain performance, excellent is resistance to as liner layer material
Fire screen is hot, also with good oxygen barrier flame retardant effect, ensures circuit in case of fire, keeps the unimpeded of certain time, prevents
Fiery consistency of performance is reliable.Answer smooth rounding, uniform external diameter in outer jacket surface.
The foregoing is merely the specific embodiment of the present invention, without departing from the structure of the invention, that is done is any
Modification, improve etc., also it should be regarded as in protection scope of the present invention.
Claims (9)
1. pressure crosslinking flexible fire-proof cable in a kind of environmental protection heat insulation type metal steel sheath, including conductor (1), it is characterised in that：Institute
State conductor (1) outsourcing insulating layer coating (2) and form insulated wire cores afterwards, the cable core internal clearance after insulated wire cores combination stranding is filled with
Filled layer (3), cable core are coated with fire lagging (4), thermal insulation layer (5), liner layer (6), protective layer (7) and outer jacket successively outside
(8)。
2. pressure crosslinking flexible fire-proof cable in environmental protection heat insulation type metal steel sheath according to claim 1, it is characterised in that：
The insulating layer (2) is peroxide crosslinked polyethylene insulating layer.
3. pressure crosslinking flexible fire-proof cable in environmental protection heat insulation type metal steel sheath according to claim 2, it is characterised in that：
The filled layer (3) is flame-proof silicon rubber rope.
4. pressure crosslinking flexible fire-proof cable in environmental protection heat insulation type metal steel sheath according to claim 3, it is characterised in that：
The fire lagging (4) is four layers of wrapped high flame retardancy silicon rubber composite band, and wrapped Duplication is not less than 30%, volume resistance
Rate is not less than 1 × 1015Ω.cm。
5. pressure crosslinking flexible fire-proof cable in environmental protection heat insulation type metal steel sheath according to claim 4, it is characterised in that：
The thermal insulation layer (5) is fire-resisting ceramic silicone rubber, and tensile strength is not less than 8.0Mpa, and elongation is not less than 300%, volume electricity
Resistance rate is not less than 1 × 1015Ω.cm。
6. pressure crosslinking flexible fire-proof cable in environmental protection heat insulation type metal steel sheath according to claim 5, it is characterised in that：
The liner layer (6) is ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, and the oxygen index (OI) of its material is not less than 35.
7. pressure crosslinking flexible fire-proof cable in environmental protection heat insulation type metal steel sheath according to claim 6, it is characterised in that：
The protective layer (7) is the stainless steel band lock armo protective metal shell of 0.5mm thickness.
8. pressure crosslinking flexible fire-proof cable in environmental protection heat insulation type metal steel sheath according to claim 7, it is characterised in that：
The outer jacket (7) is ceramic halogen-free and low-smoke flame-retardant polyolefin flame retardant coating, and the oxygen index (OI) of its material is not less than 35.
9. pressure crosslinking flexible fire-proof cable, its feature exist in the environmentally friendly heat insulation type metal steel sheath according to claim 1 or 8
In：The conductor (1) is twisted by single round copper wire.
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| CN201711276492.7A CN107945964A (en) | 2017-12-06 | 2017-12-06 | Pressure crosslinking flexible fire-proof cable in environmentally friendly heat insulation type metal steel sheath |
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| CN201711276492.7A CN107945964A (en) | 2017-12-06 | 2017-12-06 | Pressure crosslinking flexible fire-proof cable in environmentally friendly heat insulation type metal steel sheath |
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| CN107945964A true CN107945964A (en) | 2018-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406190A (en) * | 2019-08-08 | 2019-11-05 | 常州市沃科科技有限公司 | A kind of fire-proof and thermal-insulation blanket, cable, cable connector and cable laying structure |
| CN111128462A (en) * | 2019-12-31 | 2020-05-08 | 金湖博通科技有限公司 | Novel halogen-free cable and production process thereof |
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| EP0708455A1 (en) * | 1994-10-20 | 1996-04-24 | Dätwyler AG | Flame-retardant composition for manufacturing of electrical cables with insulation and/or functioning continuation |
| CN202796223U (en) * | 2012-07-23 | 2013-03-13 | 福建南平太阳电缆股份有限公司 | Low-smoke halogen-free high-flame-retardant fire-resistant medium-voltage crosslinked cable |
| CN103177812A (en) * | 2013-03-20 | 2013-06-26 | 江苏华亚电缆有限公司 | Environment-friendly medium-voltage fireproof cable |
| CN105931741A (en) * | 2016-04-27 | 2016-09-07 | 丹阳正联知识产权运营管理有限公司 | Heat-insulation mica insulation metal protection fireproof cable |
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| EP0708455A1 (en) * | 1994-10-20 | 1996-04-24 | Dätwyler AG | Flame-retardant composition for manufacturing of electrical cables with insulation and/or functioning continuation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110406190A (en) * | 2019-08-08 | 2019-11-05 | 常州市沃科科技有限公司 | A kind of fire-proof and thermal-insulation blanket, cable, cable connector and cable laying structure |
| CN111128462A (en) * | 2019-12-31 | 2020-05-08 | 金湖博通科技有限公司 | Novel halogen-free cable and production process thereof |
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Application publication date: 20180420 |