CN109036652A - A kind of subway fire prevention signal cable and its manufacture craft - Google Patents
A kind of subway fire prevention signal cable and its manufacture craft Download PDFInfo
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- CN109036652A CN109036652A CN201811045226.8A CN201811045226A CN109036652A CN 109036652 A CN109036652 A CN 109036652A CN 201811045226 A CN201811045226 A CN 201811045226A CN 109036652 A CN109036652 A CN 109036652A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- 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
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two layers
-
- 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
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0225—Three or more layers
-
- 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
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
- H01B7/0283—Disposition of insulation comprising one or more extruded layers of insulation comprising in addition one or more other layers of non-extruded insulation
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- 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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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- 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
-
- 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
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
Abstract
The present invention relates to a kind of subway fire prevention signal cables, including the protective coverings of cable for being located at the cable core at middle part and being wrapped in outside cable core, cable core is divided into the signal cable unit at the center of being located at and arranges the control cable core for being located at signal cable unit surrounding；Protective coverings of cable includes the belting layer successively wrapped up, flame retardant coating, armor and restrictive coating.In use, fire prevention signal cable of the invention can reduce construction, there is excellent fire-proof function, fiery grade can reach the A grade standard of GB12666.6, while have good thermal insulation and waterproof performance, guarantee subway signal system safety operation.
Description
Technical field
The present invention relates to the technical field of signal cable, specifically a kind of subway fire prevention signal cable and its production
Technique.
Background technique
With the propulsion of urban development, the subway of high-speed cruising brings great convenience to people's trip, due to subway
The section of operation is flow of personnel place the most intensive, and various signal systems in subway, then plays key to subway circulation
Effect.
Among these, signal system safe power supply just can guarantee the effective of signal control.Therefore, subway is to cable fire feelings
Security performance under condition proposes requirement, it is desirable that and cable remains to maintain a period of time normal power supply under flame conditions, in order to
Escape and rescue.
Existing signal cable, can not be by both signal cable and control cable comprehensive design, signal cable and control electricity
Cable needs to construct respectively twice, while not having fire protecting performance, not can guarantee subway signal system in fire line piece and keeps one
The normal power supply fixed time, therefore the needs of subway circulation are unable to satisfy, it is badly in need of wanting a kind of can be used for subway in the market, has
There is the composite cable of fire protecting performance.
Summary of the invention
The purpose of the present invention is to provide a kind of improved subway fire prevention signal cable and its manufacture crafts, it can overcome
Both signal cable and control cable can not integrate in the prior art, while not have the deficiency of fire protecting performance.
To achieve the goals above, the technical scheme is that a kind of subway fire prevention signal cable, feature exist
In: signal cable includes the protective coverings of cable for being located at the cable core at middle part and being wrapped in outside cable core, cable core point
The control cable core of signal cable unit surrounding is located at for the signal cable unit being located at center and row；Protective coverings of cable
Including belting layer, flame retardant coating, armor and the restrictive coating successively wrapped up.
Preferably, the inner core of signal cable unit is one group of signal conductor, and the outside of each signal conductor is enclosed with
Internal double layers fire lagging, is enclosed with the fire-retardant belting layer of inner core and sheath outside inner core, inner core and the fire-retardant belting layer of inner core it
Between fill out equipped with inorganic fill layer；The surrounding of signal cable unit is laid with 8-20 root control cable core, every control cable
Core includes the control conductor for being located at middle part, and the surrounding for controlling conductor is enclosed with the external double-deck fire lagging.
Further, flame retardant coating is made of ceramic polyolefin jacket material, and with a thickness of 0.8-1.3mm, armor uses steel
Compound armoring tape is moulded to coat, restrictive coating is extruded in armouring layer surface using low smoke halogen-free sheath material, belting layer, flame retardant coating,
The ratio between thickness of armor and restrictive coating is 1:2.5:1.2:3.
Further, the inner core of signal cable unit is formed by 2-5 root signal conductor twisted synthesizing cable, and each signal conductor is adopted
It is formed with the copper free wire bundle strand that 25-32 root outer diameter is 0.23-0.25mm, internal double layers fire lagging includes that internal layer first is exhausted
Edge layer and internal layer second insulating layer, the first insulating layer of internal layer are formed using mineral-insulated fireproof band is wrapped, and internal layer second insulate
Layer is extruded using ceramic polyolefin fire-proof insulation material, and the ratio between thickness of the first, second insulating layer of internal layer is 1:2-3.5；
The fire-retardant belting layer of inner core is formed using low-smoke non-halogen flame-retardant band is wrapped, and establishment screen is equipped between the fire-retardant belting layer of inner core and sheath
Layer is covered, inorganic fill layer is the inorganic rope of glass fibre.
A kind of manufacture craft of subway fire prevention signal cable, it is characterised in that: the technique includes the following steps: a, system
Make signal cable unit, signal conductor is formed using copper free wire bundle strand, it is exhausted to extrude internal double layers fire prevention on signal conductor surface
Edge layer, 2-5 root signal conductor press arranged clockwise twisted synthesizing cable；B production control cable core, is made of copper free wire monofilament
Conductor is controlled, the external double-deck fire lagging is extruded outside control conductor；C, the signal cable that will be obtained during above-mentioned a, b
Unit and control cable core carry out comprehensive stranding, and signal cable unit is placed at cable center, and 8-20 root controls cable
Core is circumferentially positioned at signal cable unit surrounding, and control cable core is using number mark, and control cable core is by side clockwise
To arrangement, stranding wraps up belting layer simultaneously and is tightened outside control cable core；D, successively wrapped up outside belting layer flame retardant coating,
Armor and restrictive coating complete the production of fire prevention signal cable.
Further, in a step, each signal conductor uses 25-32 root outer diameter for the oxygen-free copper tow of 0.23-0.25mm
It twists, internal double layers fire lagging includes the first insulating layer of internal layer and internal layer second insulating layer, and the first insulating layer of internal layer is adopted
It being formed with mineral-insulated fireproof band is wrapped, internal layer second insulating layer is extruded using ceramic polyolefin fire-proof insulation material,
The ratio between thickness of the first, second insulating layer of internal layer is 1:2-3.5；The fire-retardant belting layer of inner core and sheath are enclosed with outside inner core, it is interior
It is filled out between core and the fire-retardant belting layer of inner core equipped with inorganic fill layer, establishment shielding is equipped between the fire-retardant belting layer of inner core and sheath
Layer, inorganic fill layer is the inorganic rope of glass fibre.
Further, in b step, control conductor uses outer diameter to be made of the copper free wire monofilament of 1.38mm, and outer layer first is exhausted
Edge layer is formed using mineral-insulated fireproof band is wrapped, and outer layer second insulating layer is extruded using ceramic polyolefin fire-proof insulation material
It forms, the ratio between thickness of the first, second insulating layer of outer layer is 1:1.5-2.5.
Further, using being made with a thickness of the ceramic polyolefin jacket material of 0.8-1.3mm, armor uses flame retardant coating
Steel plastic compount armoring tape coats, and restrictive coating is extruded in armouring layer surface, belting layer, fire resisting using low smoke halogen-free sheath material
The ratio between thickness of layer, armor and restrictive coating is 1:2.5:1.2:3.
Compared with the existing technology, technical solution of the present invention further includes many details in addition to the improvement of overall technical architecture
The improvement of aspect, specifically, having the advantages that
1, improvement project of the present invention, signal cable include being located at the cable core at middle part and being wrapped in outside cable core
Protective coverings of cable, cable core is divided into signal cable unit at the center of being located at and row is located at signal cable unit surrounding
Cable core is controlled, signal cable and control cable are combined into one, can carry out integrated application, avoid existing by this design
Both cables need to construct twice during installation in technology, save installation procedure, reduce costs；
2, in technical solution of the present invention, the double-deck fire-proof insulation is respectively equipped with outside the conductor of signal cable and control cable
Layer, fire resistance rating can reach the A grade standard of GB12666.6, i.e., burn 90min in 950 ~ 1000 DEG C of flames, and 3A fuse is not
Fusing；Also it can reach the C highest level of Britain BS6387, i.e. C --- burn 3H in 950 DEG C of flames；
3, the present invention signal cable unit and control cable core outside successively wrap up belting layer, flame retardant coating, armor and
Restrictive coating, so that the present invention has good thermal insulation, thermal coefficient 0.09W/Mk has good waterproof performance, effectively
Prevent moisture axially into cable inside, to have excellent axial waterproof performance；
4, fire prevention signal cable of the invention is structurally reasonable, and easy to process and construction is laid with, and has good electrical insulating property: volume
Resistivity is up to volume resistivity >=2 × 1015 Ω cm, breakdown strength >=20kv/mm.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of signal cable unit of the invention.
Appended drawing reference:
1 signal cable unit, 2 control cable cores, 3 belting layers, 4 flame retardant coatings, 5 armors, 6 restrictive coatings；
The fire-retardant belting layer of 11 inner cores, 12 sheaths, 13 inorganic fill layers, 14 signal conductors, 15 the first insulating layers of internal layer, 16 internal layers
Two insulating layers；
21 control conductors, 22 the first insulating layers of outer layer, 23 outer layer second insulating layers.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides a kind of subway fire prevention signal cables, and referring specifically to Fig. 1, difference with the prior art exists
In: signal cable includes the protective coverings of cable for being located at the cable core at middle part and being wrapped in outside cable core, cable core point
The control cable core 2 of signal cable unit surrounding is located at for the signal cable unit 1 being located at center and row；It is protected outside cable
Layer includes belting layer 3, flame retardant coating 4, armor 5 and the restrictive coating 6 successively wrapped up.
Preferably, the inner core of signal cable unit is one group of signal conductor, and the outside of each signal conductor is enclosed with
Internal double layers fire lagging is enclosed with the fire-retardant belting layer 11 of inner core and sheath 12, inner core and the fire-retardant band of inner core outside inner core
It fills out between layer equipped with inorganic fill layer 13；The surrounding of signal cable unit is laid with 8-20 root control cable core, every control
Cable core includes the control conductor 21 for being located at middle part, and the surrounding for controlling conductor is enclosed with the external double-deck fire lagging.It is preferred that
, flame retardant coating is made of ceramic polyolefin jacket material, and with a thickness of 0.8-1.3mm, armor uses steel plastic compount armoring tape
It coats, restrictive coating is extruded in armouring layer surface, belting layer, flame retardant coating, armor and sheath using low smoke halogen-free sheath material
The ratio between thickness of layer is 1:2.5:1.2:3.
Further, the inner core of signal cable unit is formed by 14 twisted synthesizing cable of 2-5 root signal conductor, each signal conductor
25-32 root outer diameter is used to form for the copper free wire bundle strand of 0.23-0.25mm, internal double layers fire lagging includes internal layer first
Insulating layer 15 and internal layer second insulating layer 16, the first insulating layer of internal layer are formed using mineral-insulated fireproof band is wrapped, internal layer the
Two insulating layers are extruded using ceramic polyolefin fire-proof insulation material, and the ratio between thickness of the first, second insulating layer of internal layer is 1:
2-3.5；The fire-retardant belting layer of inner core is formed using low-smoke non-halogen flame-retardant band is wrapped, is equipped between the fire-retardant belting layer of inner core and sheath
Shielded layer is worked out, inorganic fill layer is the inorganic rope of glass fibre.
In one embodiment, prevent fires signal cable center at be provided that signal cable unit, signal cable unit
Surrounding be laid with 12 control cable cores (referring to Fig. 1), the inner core of signal cable unit is one group of two signal conductor, often
The outside of a piece signal conductor is enclosed with internal double layers fire lagging, and the fire-retardant belting layer of inner core and shield are enclosed with outside inner core
Set, is filled out between inner core and the fire-retardant belting layer of inner core equipped with inorganic fill layer, columned inorganic fill is also made in inorganic fill layer
Guide pillar structure, and be separately positioned between two signal conductors, one is just formed after signal cable unit stranding entire in this way
Stable structure, the diameter and signal conductor diameter ratio of inorganic fill guide pillar structure are 1:1.5, and inorganic fill guide pillar structure is adopted
It is made of glass cord and low-smoke halogen-free material, plays further flameproof effect.
Elastic fireproof sealant is equipped between inorganic fill guide pillar structure and the fire-retardant belting layer of signal conductor, inner core, in nothing
Machine fills the outer surface setting strip or spiral helicine elastic fireproof sealant of the outer surface of guide pillar structure, signal conductor, makes
The outer surface of the outer surface and signal conductor that obtain inorganic fill guide pillar structure is wound with this kind of material, this kind of elastic fireproof sealant
The meeting volume expansion in heat, and then play the role of fire prevention, insulation and barrier, delay damage of the intensity of a fire for signal conductor,
Extend the effective storage life of signal conductor.Elastic fireproof sealant is existing product, just repeats no more its specific work here
Make principle.
Specifically, control conductor is made of copper free wire monofilament, and external bilayer fire lagging includes outer layer first
Insulating layer 22 and outer layer second insulating layer 23, the first insulating layer of outer layer are formed using mineral-insulated fireproof band is wrapped, outer layer the
Two insulating layers are extruded using ceramic polyolefin fire-proof insulation material, and the ratio between thickness of the first, second insulating layer of outer layer is 1:
2.Red and blue mark is respectively adopted in two signal conductors.Ceramic polyolefin fire-proof insulation material adopted here, which removes, to be had
Outside the characteristic of common polyolefin insulation material, also there is excellent fire performance, hard pottery can be formed under the calcination of flame
Porcelain shape hard shell, the hard shell are not melted under fire hazard environment (650 DEG C -3000 DEG C), are not dripped, and are had extraordinary heat-insulated
Fire insulation effect, it is ensured that electric power and communication is unobstructed under fire condition, when striving for valuable for personnel escape and fire-fighting and rescue
Between.
When making signal cable unit, two signal conductors are twisted by red blue arranged clockwise twisted synthesizing cable, while in cable
The overlapping fire-retardant belting layer of wrapped one layer of inner core (using low-smoke non-halogen flame-retardant band, thickness 0.2mm) outside core, then, inner core is fire-retardant
It is equipped with establishment shielded layer between belting layer and sheath, weaves monofilament outer diameter 0.15mm, 112 compile, and count is not less than 85%.By
It is signal cable in the unit, to prevent external power supply from interfering, using braid shielded, protects signal normal transmission.Sheath uses
Oxygen index (OI) is greater than 35 low smoke halogen-free sheath material, thickness 1.0mm.The protective cover material has high fire-retardance non-toxic nature, and when burning will not
Pernicious gas is generated, forms hard shell after burning, to protect internal core.
In another embodiment, the inner core of signal cable unit is one group of signal conductor, and totally 3 signal conductors, each
The outside of root signal conductor is enclosed with internal double layers fire lagging, and the fire-retardant belting layer of inner core and shield are enclosed with outside inner core
Set, is filled out between inner core and the fire-retardant belting layer of inner core equipped with inorganic fill layer；The surrounding of signal cable unit is laid with 8 control electricity
Cable core, every control cable core includes the control conductor for being located at middle part, and the surrounding for controlling conductor is enclosed with external bilayer and prevents
Fiery insulating layer.Preferably, flame retardant coating is made of ceramic polyolefin jacket material, and with a thickness of 1.1mm, armor is multiple using steel modeling
It closes armoring tape to coat, restrictive coating is extruded in armouring layer surface, belting layer, flame retardant coating, armouring using low smoke halogen-free sheath material
The ratio between thickness of layer and restrictive coating is 1:2.5:1.2:3.
Further, the inner core of signal cable unit is formed by 3 signal conductor twisted synthesizing cables, and each signal conductor uses
The copper free wire bundle strand that 30 outer diameters are 0.25mm forms, and internal double layers fire lagging includes the first insulating layer of internal layer and internal layer
Second insulating layer, the first insulating layer of internal layer are formed using mineral-insulated fireproof band is wrapped, and internal layer second insulating layer is using ceramics
Change polyolefin fire-proof insulation material to extrude, the ratio between thickness of the first, second insulating layer of internal layer is 1:3.2；The fire-retardant band of inner core
Layer is formed using low-smoke non-halogen flame-retardant band is wrapped, and establishment shielded layer is equipped between the fire-retardant belting layer of inner core and sheath, inorganic to fill out
Filling layer is the inorganic rope of glass fibre.
Further, it is possible to add auxiliary insulating layer between the first insulating layer of internal layer and internal layer second insulating layer, auxiliary is exhausted
Edge layer is grid-shaped, interconnects between each grid, and grid is made of grid waterproof cloth, and chlorine is coated on grid
Change rubber swelling fireproof coating, can be expanded foamed when meeting fiery heat, delay the heating of inner conductor, plays a protective role.This
In grid waterproof cloth use fibrous mesh cloth or glass fiber screen cloth, it is just no longer superfluous here since grid cloth is the prior art
It states.
Further, control conductor uses outer diameter to be made of the copper free wire monofilament of 1.38mm, external bilayer fire lagging
Including the first insulating layer of outer layer and outer layer second insulating layer, the first insulating layer of outer layer using mineral-insulated fireproof band it is wrapped and
At outer layer second insulating layer is extruded using ceramic polyolefin fire-proof insulation material, the thickness of the first, second insulating layer of outer layer
The ratio between be 1:2.5.The first insulating layer of outer layer is using the wrapped mineral-insulated fireproof band of overlapping, band thickness 0.14mm.Outer layer
Two insulating layers use fire proofing material ceramic polyolefin insulation material, and material is black, with a thickness of 0.6mm.1-8 is respectively adopted in 8 cores
Number mark.Ceramic polyolefin fire-proof insulation material is also prevented with excellent in addition to the characteristic with common polyolefin insulation material
Fiery characteristic can form hard ceramic-like hard shell under the calcination of flame, and the hard shell is at fire hazard environment (650 DEG C -3000 DEG C)
Under do not melt, do not drip, and there is extraordinary heat-insulated fire insulation effect, it is ensured that electric power and communication is logical under fire condition
Freely, strive for valuable time for personnel escape and fire-fighting and rescue.
In a specific implementation process, the manufacture craft of subway fire prevention signal cable includes the following steps: a, production
Signal cable unit forms signal conductor using copper free wire bundle strand, extrudes internal double layers fire-proof insulation on signal conductor surface
Layer, 2-5 root signal conductor press arranged clockwise twisted synthesizing cable；B production control cable core, is made control using copper free wire monofilament
Conductor processed extrudes the external double-deck fire lagging outside control conductor；C, the signal cable list that will be obtained during above-mentioned a, b
Member and control cable core carry out comprehensive stranding, and signal cable unit is placed at cable center, and 8-20 root controls cable core
It is circumferentially positioned at signal cable unit surrounding, control cable core is using number mark, and control cable core is in the direction of the clock
Arrangement, stranding wrap up belting layer simultaneously and are tightened outside control cable core；D, flame retardant coating, armour are successively wrapped up outside belting layer
Layer and restrictive coating are filled, the production of fire prevention signal cable is completed.
In a step, each signal conductor uses 25-32 root outer diameter to form for the copper free wire bundle strand of 0.23-0.25mm,
Internal double layers fire lagging includes the first insulating layer of internal layer and internal layer second insulating layer, and the first insulating layer of internal layer is exhausted using mineral
Edge is prevented fires, and band is wrapped to be formed, and internal layer second insulating layer is extruded using ceramic polyolefin fire-proof insulation material, internal layer first,
The ratio between thickness of second insulating layer is 1:2-3.5；The fire-retardant belting layer of inner core and sheath are enclosed with outside inner core, inner core and inner core hinder
It fills out between combustion belting layer equipped with inorganic fill layer, establishment shielded layer, inorganic fill is equipped between the fire-retardant belting layer of inner core and sheath
Layer is the inorganic rope of glass fibre.In b step, control conductor uses outer diameter to be made of the copper free wire monofilament of 1.38mm, outer layer the
One insulating layer is formed using mineral-insulated fireproof band is wrapped, and outer layer second insulating layer uses ceramic polyolefin fire-proof insulation material
It extrudes, the ratio between thickness of the first, second insulating layer of outer layer is 1:1.5-2.5.Flame retardant coating uses with a thickness of 0.8-1.3mm's
Ceramic polyolefin jacket material is made, and armor is coated using steel plastic compount armoring tape, and restrictive coating is protected using low smoke and zero halogen
Jacking is extruded in armouring layer surface, and the ratio between belting layer, flame retardant coating, armor and thickness of restrictive coating are 1:2.5:1.2:3.
In another implementation process, signal cable unit, signal cable are provided that at the center for signal cable of preventing fires
The surrounding of unit is laid with 12 control cable cores (referring to Fig. 1), and each signal conductor uses 28 outer diameters for 0.24mm
Copper free wire bundle strand form, when making signal cable unit, two signal conductors are twisted by red blue arranged clockwise twisted synthesizing cable
It closes, while being overlapped the fire-retardant belting layer of wrapped one layer of inner core (using low-smoke non-halogen flame-retardant band, thickness 0.2mm) outside cable core, connect
, it is equipped with establishment shielded layer between the fire-retardant belting layer of inner core and sheath, weaves monofilament outer diameter 0.15mm, 112 compile, and count is not
Less than 85%.Since the unit is signal cable, to prevent external power supply from interfering, using braid shielded, signal is protected normally to pass
It is defeated.Sheath is greater than 35 low smoke halogen-free sheath material, thickness 1.0mm using oxygen index (OI).The protective cover material has high fire-retardance non-toxic nature,
Pernicious gas will not be generated when burning, forms hard shell after burning, to protect internal core.
When cabling procedure, signal cable unit is placed in composite cable center, and control cable core is surrounded on signal cable
Periphery, control cable core are arranged in the direction of the clock using number mark, core, and to 12 since 1, natural numerical order is suitable
Clockwise arrangement.Simultaneously, wrapped one layer of low-smoke non-halogen flame-retardant band (0.2mm) tightens stranding on cable core, and band plays heat-insulated
Effect.
Flame retardant coating uses Novel fireproof material ceramic polyolefin jacket material, and material is black, with a thickness of 1.0mm.Ceramics
Changing polyolefin fireproof material has excellent fire performance, and hard ceramic-like hard shell can be formed under the calcination of flame,
The hard shell is not melted under fire hazard environment (650 DEG C -3000 DEG C), is not dripped, and has extraordinary heat-insulated oxygen barrier effect.
Armor uses composite steel-plastic belt (thickness 0.25mm), embossing longitudinal wrap.The armor, first is that meeting buried cable
It needs, load-bearing protection is played to internal cable core, second is that the plastic foil of composite steel-plastic belt, mutually bonds, effectively in sheathing
It prevents moisture from entering cable core, plays the role of cable radial direction waterproof.Three can be prevented from the animals such as termite, mouse to internal core
Bite.
Oversheath is extruded on steel plastic band layer using fashion of extrusion, thickness 2.0mm.Using oxygen index (OI) greater than 35 low cigarette without
Halogen protective cover material, thickness 2.0mm.The protective cover material has high fire-retardance non-toxic nature, and when burning will not generate pernicious gas, ties after burning
At hard shell, to protect internal core.Protective cover material adds repellent agent, can effectively prevent biting for the animals such as termite, mouse.Outer shield
Set plays a protective role.
The invention has the following advantages that
1. excellent electrical insulating property: volume resistivity is up to volume resistivity >=2 × 1015 Ω cm, breakdown strength >=20kv/
mm；
2. environmentally friendly: it is heavy metal free, nontoxic, tasteless, human body, environment are not had an impact；Ant proof, mouse bite preventing, waterproof,
Oil resistant.
3. good thermal insulation, the inside after thermal coefficient 0.09W/Mk, especially ablation is uniform honeycomb, tool
There are better fire resistance and thermal insulation；
4. excellent fire protecting performance, fire resistance rating can reach the A grade standard of GB12666.6, i.e., fires in 950 ~ 1000 DEG C of flames
90min is burnt, 3A fuse does not fuse；Also it can reach the C W Z highest level of Britain BS6387, i.e. C --- in 950 DEG C of flames
Burn 3H, W --- water spray, Z --- vibration；
5. excellent waterproof performance.It is effective to prevent moisture axially into electricity due to bonding longitudinal wrap using composite steel-plastic belt embossing
Inside cable, to have excellent axial waterproof performance.
6. anti-animal bites.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Present invention specific implementation is confined to these above-mentioned explanations.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention
Protection scope.
Claims (9)
1. a kind of subway fire prevention signal cable, it is characterised in that: signal cable includes the cable core and package for being located at middle part
Protective coverings of cable outside cable core, cable core, which is divided into the signal cable unit at the center of being located at and arranges, is located at signal
The control cable core of cable unit surrounding；Protective coverings of cable includes the belting layer successively wrapped up, flame retardant coating, armor and sheath
Layer.
2. a kind of subway according to claim 1 fire prevention signal cable, it is characterised in that: the inner core of signal cable unit
For one group of signal conductor, the outside of each signal conductor is enclosed with internal double layers fire lagging, is enclosed with outside inner core
The fire-retardant belting layer of inner core and sheath are filled out between inner core and the fire-retardant belting layer of inner core equipped with inorganic fill layer；Signal cable unit
Surrounding is laid with 8-20 root control cable core, and every control cable core includes the control conductor for being located at middle part, controls conductor
Surrounding be enclosed with external double-deck fire lagging.
3. a kind of subway according to claim 1 fire prevention signal cable, it is characterised in that: flame retardant coating is poly- using ceramic
Alkene protective cover material is made, and with a thickness of 0.8-1.3mm, armor is coated using steel plastic compount armoring tape, and restrictive coating is using low
Cigarette Halogen protective cover material is extruded in armouring layer surface, and the ratio between belting layer, flame retardant coating, armor and thickness of restrictive coating are 1:2.5:
1.2:3。
4. a kind of subway according to claim 2 fire prevention signal cable, it is characterised in that: the inner core of signal cable unit
It is formed by 2-5 root signal conductor twisted synthesizing cable, each signal conductor uses 25-32 root outer diameter for the anaerobic of 0.23-0.25mm
Copper wire bundle strand forms, and internal double layers fire lagging includes the first insulating layer of internal layer and internal layer second insulating layer, and internal layer first is exhausted
Edge layer is formed using mineral-insulated fireproof band is wrapped, and internal layer second insulating layer is extruded using ceramic polyolefin fire-proof insulation material
It forms, the ratio between thickness of the first, second insulating layer of internal layer is 1:2-3.5；The fire-retardant belting layer of inner core uses low-smoke non-halogen flame-retardant packet
It is formed with wrapped, establishment shielded layer is equipped between the fire-retardant belting layer of inner core and sheath, inorganic fill layer is the inorganic rope of glass fibre.
5. a kind of subway according to claim 2 fire prevention signal cable, it is characterised in that: control conductor uses oxygen-free copper
Silk monofilament is made, and external bilayer fire lagging includes the first insulating layer of outer layer and outer layer second insulating layer, and outer layer first insulate
Layer is formed using mineral-insulated fireproof band is wrapped, outer layer second insulating layer extruded using ceramic polyolefin fire-proof insulation material and
At the ratio between thickness of the first, second insulating layer of outer layer is 1:1.5-2.5.
6. a kind of manufacture craft of subway fire prevention signal cable according to claim 1, it is characterised in that: the technique
Include the following steps: a, production signal cable unit, signal conductor is formed using copper free wire bundle strand, is squeezed on signal conductor surface
Packet internal double layers fire lagging, 2-5 root signal conductor press arranged clockwise twisted synthesizing cable；B production control cable core, uses
Control conductor is made in copper free wire monofilament, and the external double-deck fire lagging is extruded outside control conductor；C, by above-mentioned a, b process
The signal cable unit and control cable core of middle acquisition carry out comprehensive stranding, and signal cable unit is placed at cable center,
8-20 root control cable core is circumferentially positioned at signal cable unit surrounding, and control cable core is using number mark, control electricity
Cable core arranges in the direction of the clock, and stranding wraps up belting layer simultaneously and tightened outside control cable core；D, in belting layer
Flame retardant coating, armor and restrictive coating are successively wrapped up outside, complete the production of fire prevention signal cable.
7. a kind of manufacture craft of subway fire prevention signal cable according to claim 6, it is characterised in that: in a step,
Each signal conductor uses 25-32 root outer diameter to form for the copper free wire bundle strand of 0.23-0.25mm, internal double layers fire-proof insulation
Layer include the first insulating layer of internal layer and internal layer second insulating layer, the first insulating layer of internal layer using mineral-insulated fireproof band it is wrapped and
At internal layer second insulating layer is extruded using ceramic polyolefin fire-proof insulation material, the thickness of the first, second insulating layer of internal layer
The ratio between be 1:2-3.5；It is enclosed with the fire-retardant belting layer of inner core and sheath outside inner core, fills out and sets between inner core and the fire-retardant belting layer of inner core
There is inorganic filled layer, establishment shielded layer is equipped between the fire-retardant belting layer of inner core and sheath, inorganic fill layer is that glass fibre is inorganic
Rope.
8. a kind of manufacture craft of subway fire prevention signal cable according to claim 6, it is characterised in that: in b step,
Control conductor uses outer diameter to be made of the copper free wire monofilament of 1.38mm, and the first insulating layer of outer layer uses mineral-insulated fireproof band
Wrapped to form, outer layer second insulating layer is extruded using ceramic polyolefin fire-proof insulation material, the first, second insulating layer of outer layer
The ratio between thickness be 1:1.5-2.5.
9. a kind of manufacture craft of subway fire prevention signal cable according to claim 6, it is characterised in that: flame retardant coating is adopted
It is made of with a thickness of the ceramic polyolefin jacket material of 0.8-1.3mm, armor is coated using steel plastic compount armoring tape, is protected
Jacket layer is extruded in the ratio between armouring layer surface, belting layer, flame retardant coating, armor and the thickness of restrictive coating using low smoke halogen-free sheath material
For 1:2.5:1.2:3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811045226.8A CN109036652A (en) | 2018-09-07 | 2018-09-07 | A kind of subway fire prevention signal cable and its manufacture craft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811045226.8A CN109036652A (en) | 2018-09-07 | 2018-09-07 | A kind of subway fire prevention signal cable and its manufacture craft |
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ID=64624122
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| CN205751652U (en) * | 2016-07-06 | 2016-11-30 | 宝上电缆有限公司 | A kind of Novel fire-resistant controls cable |
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| CN208622457U (en) * | 2018-09-07 | 2019-03-19 | 上海朗达电缆（集团）有限公司 | A kind of subway fire prevention signal cable |
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| CN204229911U (en) * | 2014-12-17 | 2015-03-25 | 中利科技集团（辽宁）有限公司 | The comprehensive fireproof cable of subway |
| WO2016145690A1 (en) * | 2015-03-18 | 2016-09-22 | 中天科技装备电缆有限公司 | Ultra-oil-resistant and ultra-low-temperature-resistant photoelectric comprehensive cable for rail transit vehicle and preparation method therefor |
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