CN109036652B - Fireproof signal cable for subway and manufacturing process thereof - Google Patents
Fireproof signal cable for subway and manufacturing process thereof Download PDFInfo
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- CN109036652B CN109036652B CN201811045226.8A CN201811045226A CN109036652B CN 109036652 B CN109036652 B CN 109036652B CN 201811045226 A CN201811045226 A CN 201811045226A CN 109036652 B CN109036652 B CN 109036652B
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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
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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
- H01B7/0225—Three or more layers
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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
- H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of 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
- H01B7/02—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
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- 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
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- H—ELECTRICITY
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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Abstract
The invention relates to a fireproof signal cable for subways, which comprises a cable core arranged in the middle and a cable outer protective layer wrapping the outer part of the cable core, wherein the cable core is divided into a signal cable unit arranged in the center and a control cable core arranged around the signal cable unit; the cable outer protective layer comprises a wrapping tape layer, a fire-resistant layer, an armor layer and a sheath layer which are sequentially wrapped. When the fireproof signal cable is used, construction can be reduced, the fireproof signal cable has an excellent fireproof function, the fire grade can reach the A-grade standard of GB12666.6, and meanwhile, the fireproof signal cable has good heat insulation and waterproof performance, and the safe operation of a subway signal system is ensured.
Description
Technical Field
The invention relates to the technical field of signal cables, in particular to a fireproof signal cable for subways and a manufacturing process thereof.
Background
Along with the promotion of urban development, the subway running at high speed brings great convenience for people to travel, and as the section of the subway running is the place where the personnel flow is the most intensive, various signal systems in the subway play a key role in the subway running.
The signal system is safely powered, so that the signal control can be effectively ensured. Therefore, the subway has a requirement on the safety performance under the condition of cable fire, and the cable is required to be still capable of normally supplying power for a period of time under the condition of flame so as to facilitate escape and rescue.
The existing signal cable cannot comprehensively design the signal cable and the control cable, the signal cable and the control cable need to be constructed respectively for two times, meanwhile, the signal cable and the control cable do not have fireproof performance, and the subway signal system cannot be guaranteed to normally supply power for a certain time in fire bar line members, so that the requirement of subway operation cannot be met, and the comprehensive cable with fireproof performance, which can be used for subways, is urgently needed in the market.
Disclosure of Invention
The invention aims to provide an improved fireproof signal cable for subways and a manufacturing process thereof, which can overcome the defect that the signal cable and the control cable cannot be integrated and have no fireproof performance in the prior art.
In order to achieve the above object, the technical scheme of the present invention is as follows: the utility model provides a fire prevention signal cable for subway which characterized in that: the signal cable comprises a cable core arranged in the middle and a cable outer protective layer wrapping the outside of the cable core, wherein the cable core is divided into a signal cable unit arranged in the center and a control cable core arranged around the signal cable unit; the cable outer protective layer comprises a wrapping tape layer, a fire-resistant layer, an armor layer and a sheath layer which are sequentially wrapped.
Preferably, the inner core of the signal cable unit is a group of signal conductors, the outer part of each signal conductor is wrapped with an inner double-layer fireproof insulating layer, the outer part of the inner core is wrapped with an inner core flame-retardant wrapping layer and a sheath, and an inorganic filling layer is filled between the inner core and the inner core flame-retardant wrapping layer; 8-20 control cable cores are distributed on the periphery of the signal cable unit, each control cable core comprises a control conductor arranged in the middle, and an outer double-layer fireproof insulating layer is wrapped around the control conductor.
Further, the fire-resistant layer is made of ceramic polyolefin sheath material, the thickness is 0.8-1.3mm, the armor layer is formed by cladding steel-plastic composite armor tape, the sheath layer is extruded on the surface of the armor layer by adopting low-smoke halogen-free sheath material, and the thickness ratio of the wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer is 1:2.5:1.2:3.
Further, the inner core of the signal cable unit is formed by twisting 2-5 signal conductors into a cable, each signal conductor is formed by twisting 25-32 oxygen-free copper wire bundles with the outer diameter of 0.23-0.25mm, the inner double-layer fireproof insulating layer comprises an inner first insulating layer and an inner second insulating layer, the inner first insulating layer is formed by wrapping mineral insulation fireproof wrapping tape, the inner second insulating layer is formed by extruding ceramic polyolefin fireproof insulating materials, and the thickness ratio of the inner first insulating layer to the inner second insulating layer is 1:2-3.5; the inner core flame-retardant wrapping tape layer is formed by wrapping low-smoke halogen-free flame-retardant wrapping tape, a braided shielding layer is arranged between the inner core flame-retardant wrapping tape layer and the sheath, and the inorganic filling layer is a glass fiber inorganic rope.
A manufacturing process of a fireproof signal cable for subways is characterized by comprising the following steps of: the process comprises the following steps: a. manufacturing a signal cable unit, forming a signal conductor by adopting oxygen-free copper wire bundles, extruding an inner double-layer fireproof insulating layer on the surface of the signal conductor, and twisting 2-5 signal conductors into a cable according to clockwise arrangement; b, manufacturing a control cable core, manufacturing a control conductor by adopting an oxygen-free copper wire monofilament, and extruding an external double-layer fireproof insulating layer outside the control conductor; c. the signal cable units and the control cable cores obtained in the processes a and b are combined into a cable, the signal cable units are placed at the center of the cable, 8-20 control cable cores are arranged around the signal cable units in a surrounding mode, the control cable cores adopt digital marks, the control cable cores are arranged in a clockwise direction, and the cable is formed by wrapping a wrapping layer outside the control cable cores and is fastened; d. and sequentially wrapping the fire-resistant layer, the armor layer and the sheath layer outside the wrapping band layer to finish the manufacture of the fireproof signal cable.
In the step a, each signal conductor is formed by twisting 25-32 oxygen-free copper tows with the outer diameter of 0.23-0.25mm, the inner double-layer fireproof insulating layer comprises an inner first insulating layer and an inner second insulating layer, the inner first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the inner second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the inner first insulating layer to the inner second insulating layer is 1:2-3.5; the outside of the inner core is wrapped with an inner core flame-retardant wrapping tape layer and a sheath, an inorganic filling layer is filled between the inner core and the inner core flame-retardant wrapping tape layer, a braided shielding layer is arranged between the inner core flame-retardant wrapping tape layer and the sheath, and the inorganic filling layer is a glass fiber inorganic rope.
In the step b, the control conductor is made of oxygen-free copper wire monofilaments with the outer diameter of 1.38mm, the outer first insulating layer is formed by wrapping mineral insulation fireproof wrapping tape, the outer second insulating layer is formed by extruding ceramic polyolefin fireproof insulating material, and the thickness ratio of the outer first insulating layer to the outer second insulating layer is 1:1.5-2.5.
Furthermore, the fire-resistant layer is made of ceramic polyolefin sheath material with the thickness of 0.8-1.3mm, the armor layer is formed by cladding a steel-plastic composite armor tape, the sheath layer is extruded on the surface of the armor layer by adopting low-smoke halogen-free sheath material, and the thickness ratio of the wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer is 1:2.5:1.2:3.
Compared with the prior art, the technical scheme of the invention comprises a plurality of improvements in detail besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:
1. The signal cable comprises the cable core arranged in the middle and the cable outer protective layer wrapped outside the cable core, wherein the cable core is divided into the signal cable unit arranged in the center and the control cable core arranged around the signal cable unit;
2. in the technical scheme of the invention, double-layer fireproof insulating layers are respectively arranged outside conductors of the signal cable and the control cable, the fireproof grade can reach the grade A standard of GB12666.6, namely, the signal cable and the control cable are burnt in flame at 950-1000 ℃ for 90min, and a 3A fuse is not fused; the C highest grade of British BS6387, namely C-3H in a 950℃flame, can also be achieved;
3. The wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer are sequentially wrapped outside the signal cable unit and the control cable core, so that the cable has good heat insulation, the heat conductivity coefficient is 0.09W/Mk, good waterproof performance is achieved, moisture is effectively prevented from entering the cable axially, and therefore the cable has excellent axial waterproof performance;
4. The fireproof signal cable disclosed by the invention is reasonable in structure, convenient to process, construct and lay, and good in electrical insulation property: the volume resistivity can reach that the volume resistivity is more than or equal to 2 multiplied by 1015 ohm cm, and the breakdown strength is more than or equal to 20kv/mm.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a signal cable unit according to the present invention.
Reference numerals:
the cable comprises a signal cable unit 1, a control cable core 2, a wrapping tape layer 3, a fire-resistant layer 4, an armor layer 5 and a sheath layer 6;
11 inner core flame-retardant tape layers, 12 sheaths, 13 inorganic filling layers, 14 signal conductors, 15 inner layer first insulating layers and 16 inner layer second insulating layers;
21 control conductor, 22 outer first insulating layer, 23 outer second insulating layer.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a fireproof signal cable for subways, which is shown in fig. 1 in detail, and is different from the prior art in that: the signal cable comprises a cable core arranged in the middle and a cable outer protective layer wrapping the outside of the cable core, wherein the cable core is divided into a signal cable unit 1 arranged in the center and a control cable core 2 arranged around the signal cable unit; the cable outer sheath includes band layer 3, flame retardant coating 4, armor 5 and restrictive coating 6 of parcel in proper order.
Preferably, the inner core of the signal cable unit is a group of signal conductors, an inner double-layer fireproof insulating layer is wrapped outside each signal conductor, an inner core flame-retardant wrapping layer 11 and a sheath 12 are wrapped outside the inner core, and an inorganic filling layer 13 is filled between the inner core and the inner core flame-retardant wrapping layer; 8-20 control cable cores are distributed on the periphery of the signal cable unit, each control cable core comprises a control conductor 21 arranged in the middle, and an outer double-layer fireproof insulating layer is wrapped around the control conductor. Preferably, the fire-resistant layer is made of ceramic polyolefin sheath material, the thickness is 0.8-1.3mm, the armor layer is formed by cladding steel-plastic composite armor tape, the sheath layer is extruded on the surface of the armor layer by adopting low-smoke halogen-free sheath material, and the thickness ratio of the wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer is 1:2.5:1.2:3.
Further, the inner core of the signal cable unit is formed by twisting 2-5 signal conductors 14 into a cable, each signal conductor is formed by twisting 25-32 oxygen-free copper tows with the outer diameter of 0.23-0.25mm, the inner double-layer fireproof insulating layer comprises an inner-layer first insulating layer 15 and an inner-layer second insulating layer 16, the inner-layer first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the inner-layer second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the inner-layer first insulating layer to the inner-layer second insulating layer is 1:2-3.5; the inner core flame-retardant wrapping tape layer is formed by wrapping low-smoke halogen-free flame-retardant wrapping tape, a braided shielding layer is arranged between the inner core flame-retardant wrapping tape layer and the sheath, and the inorganic filling layer is a glass fiber inorganic rope.
In one embodiment, a signal cable unit is arranged at the center of the fireproof signal cable, 12 control cable cores (see fig. 1) are arranged around the signal cable unit, an inner core of the signal cable unit is a group of two signal conductors, an inner double-layer fireproof insulating layer is wrapped outside each signal conductor, an inner core flame-retardant wrapping layer and a sheath are wrapped outside the inner core, an inorganic filling layer is filled between the inner core and the inner core flame-retardant wrapping layer, the inorganic filling layer is also made into a cylindrical inorganic filling guide post structure and is respectively arranged between the two signal conductors, so that a stable structure is formed after the whole signal cable unit is cabled, the diameter of the inorganic filling guide post structure and the diameter of the signal conductors are in a ratio of 1:1.5, and the inorganic filling guide post structure is made of glass fiber ropes and low-smoke halogen-free materials and has a further fireproof effect.
Elastic fireproof sealant is arranged between the inorganic filling guide pillar structure and the signal conductor and between the inorganic filling guide pillar structure and the inner core flame-retardant wrapping tape layer, and strip-shaped or spiral elastic fireproof sealant is arranged on the outer surface of the inorganic filling guide pillar structure and the outer surface of the signal conductor, so that the outer surface of the inorganic filling guide pillar structure and the outer surface of the signal conductor are wound with the material, and the elastic fireproof sealant can expand in volume when encountering heat, further plays roles of preventing fire, insulating and blocking, delays damage of fire to the signal conductor, and prolongs the effective service time of the signal conductor. The elastic fireproof sealant is an existing product, and the specific working principle of the elastic fireproof sealant is not repeated here.
Specifically, the control conductor is made of oxygen-free copper wire monofilaments, the outer double-layer fireproof insulating layer comprises an outer first insulating layer 22 and an outer second insulating layer 23, the outer first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the outer second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the outer first insulating layer to the outer second insulating layer is 1:2. The two signal conductors are respectively marked by red and blue. The ceramic polyolefin fireproof insulating material adopted in the method has the characteristics of common polyolefin insulating materials, and also has excellent fireproof characteristics, and can form a hard ceramic hard shell under the firing of flame, the hard shell is not molten or dripped in a fire environment (650-3000 ℃), the ceramic polyolefin fireproof insulating material has a very good heat insulation and fire isolation effect, the smooth electric power and communication under the condition of fire can be ensured, and precious time is striven for personnel escape and fire rescue.
When the signal cable unit is manufactured, two signal conductors are twisted into a cable according to the arrangement of red Lan Shun hours, meanwhile, an inner core flame-retardant wrapping layer (adopting a low-smoke halogen-free flame-retardant tape with the thickness of 0.2 mm) is overlapped and wound outside the cable core, then, a braiding shielding layer is arranged between the inner core flame-retardant wrapping layer and the sheath, the outer diameter of a braiding monofilament is 0.15mm,112 braiding is carried out, and the braiding density is not less than 85%. Because the unit is a signal cable, in order to prevent the interference of an external power supply, a braided shield is adopted to protect the normal transmission of signals. The sheath adopts a low-smoke halogen-free sheath material with the oxygen index of more than 35 and the thickness of 1.0mm. The sheath material has the characteristics of high flame retardance and no toxicity, does not generate harmful gas during combustion, and forms a crust after combustion, thereby protecting the inner wire core.
In another embodiment, the inner core of the signal cable unit is a group of signal conductors, 3 signal conductors are all covered by an inner double-layer fireproof insulating layer, an inner core flame-retardant wrapping layer and a sheath are covered outside the inner core, and an inorganic filling layer is filled between the inner core and the inner core flame-retardant wrapping layer; and 8 control cable cores are arranged around the signal cable unit, each control cable core comprises a control conductor arranged in the middle, and the periphery of the control conductor is wrapped with an external double-layer fireproof insulating layer. Preferably, the fire-resistant layer is made of ceramic polyolefin sheath material, the thickness is 1.1mm, the armor layer is formed by cladding steel-plastic composite armor tape, the sheath layer is formed by extruding low-smoke halogen-free sheath material on the surface of the armor layer, and the thickness ratio of the wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer is 1:2.5:1.2:3.
Further, the inner core of the signal cable unit is formed by twisting 3 signal conductors into a cable, each signal conductor is formed by twisting 30 oxygen-free copper wire bundles with the outer diameter of 0.25mm, the inner double-layer fireproof insulating layer comprises an inner-layer first insulating layer and an inner-layer second insulating layer, the inner-layer first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the inner-layer second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the inner-layer first insulating layer to the inner-layer second insulating layer is 1:3.2; the inner core flame-retardant wrapping tape layer is formed by wrapping low-smoke halogen-free flame-retardant wrapping tape, a braided shielding layer is arranged between the inner core flame-retardant wrapping tape layer and the sheath, and the inorganic filling layer is a glass fiber inorganic rope.
Further, an auxiliary insulating layer can be additionally arranged between the inner layer first insulating layer and the inner layer second insulating layer, the auxiliary insulating layer is in a grid shape, each grid is mutually communicated, the grids are made of grid waterproof cloth, chlorinated rubber expansion fireproof paint is coated on the grids, expansion foaming can be carried out when the chlorinated rubber expansion fireproof paint meets fire, the temperature rise of an inner conductor is delayed, and a protection effect is achieved. The mesh waterproof cloth adopts fiber mesh cloth or glass fiber mesh cloth, and the mesh cloth is the prior art and is not repeated here.
Further, the control conductor is made of oxygen-free copper wire monofilaments with the outer diameter of 1.38mm, the outer double-layer fireproof insulating layer comprises an outer first insulating layer and an outer second insulating layer, the outer first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the outer second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the outer first insulating layer to the outer second insulating layer is 1:2.5. The outer first insulating layer adopts an overlapped wrapping mineral insulating fireproof wrapping tape, and the thickness of the wrapping tape is 0.14mm. The second insulating layer of the outer layer adopts fireproof material ceramic polyolefin insulating material, the material is black, and the thickness is 0.6mm. The 8 cores are respectively marked by 1-8 numbers. The ceramic polyolefin fireproof insulating material has the characteristics of common polyolefin insulating materials, and also has excellent fireproof characteristics, and can form a hard ceramic hard shell under the firing of flame, the hard shell is not molten or dropped in a fire environment (650-3000 ℃), the ceramic polyolefin fireproof insulating material has a very good heat insulation and fire isolation effect, the smooth electric power and communication under the condition of fire can be ensured, and precious time is striven for personnel escape and fire rescue.
In one implementation process, the manufacturing process of the fireproof signal cable for the subway comprises the following steps: a. manufacturing a signal cable unit, forming a signal conductor by adopting oxygen-free copper wire bundles, extruding an inner double-layer fireproof insulating layer on the surface of the signal conductor, and twisting 2-5 signal conductors into a cable according to clockwise arrangement; b, manufacturing a control cable core, manufacturing a control conductor by adopting an oxygen-free copper wire monofilament, and extruding an external double-layer fireproof insulating layer outside the control conductor; c. the signal cable units and the control cable cores obtained in the processes a and b are combined into a cable, the signal cable units are placed at the center of the cable, 8-20 control cable cores are arranged around the signal cable units in a surrounding mode, the control cable cores adopt digital marks, the control cable cores are arranged in a clockwise direction, and the cable is formed by wrapping a wrapping layer outside the control cable cores and is fastened; d. and sequentially wrapping the fire-resistant layer, the armor layer and the sheath layer outside the wrapping band layer to finish the manufacture of the fireproof signal cable.
In the step a, each signal conductor is formed by twisting 25-32 oxygen-free copper tows with the outer diameter of 0.23-0.25mm, the inner double-layer fireproof insulating layer comprises an inner-layer first insulating layer and an inner-layer second insulating layer, the inner-layer first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the inner-layer second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the inner-layer first insulating layer to the inner-layer second insulating layer is 1:2-3.5; the outside of the inner core is wrapped with an inner core flame-retardant wrapping tape layer and a sheath, an inorganic filling layer is filled between the inner core and the inner core flame-retardant wrapping tape layer, a braided shielding layer is arranged between the inner core flame-retardant wrapping tape layer and the sheath, and the inorganic filling layer is a glass fiber inorganic rope. In the step b, the control conductor is made of oxygen-free copper wire monofilaments with the outer diameter of 1.38mm, the outer first insulating layer is formed by wrapping mineral insulation fireproof wrapping tape, the outer second insulating layer is formed by extruding ceramic polyolefin fireproof insulating material, and the thickness ratio of the outer first insulating layer to the outer second insulating layer is 1:1.5-2.5. The fire-resistant layer is made of ceramic polyolefin sheath material with the thickness of 0.8-1.3mm, the armor layer is formed by cladding steel-plastic composite armor tape, the sheath layer is extruded on the surface of the armor layer by adopting low-smoke halogen-free sheath material, and the thickness ratio of the wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer is 1:2.5:1.2:3.
In another implementation process, a signal cable unit is arranged at the center of the fireproof signal cable, 12 control cable cores (see fig. 1) are arranged around the signal cable unit, each signal conductor is formed by twisting 28 oxygen-free copper wire bundles with the outer diameter of 0.24mm, when the signal cable unit is manufactured, two signal conductors are twisted into a cable according to the arrangement of red Lan Shun hours, meanwhile, an inner core flame-retardant wrapping layer (adopting a low-smoke halogen-free flame-retardant belt with the thickness of 0.2 mm) is overlapped and wrapped outside the cable core, a braiding shielding layer is arranged between the inner core flame-retardant wrapping layer and a sheath, the outer diameter of a braiding monofilament is 0.15mm,112 is braided, and the braiding density is not less than 85%. Because the unit is a signal cable, in order to prevent the interference of an external power supply, a braided shield is adopted to protect the normal transmission of signals. The sheath adopts a low-smoke halogen-free sheath material with the oxygen index of more than 35 and the thickness of 1.0mm. The sheath material has the characteristics of high flame retardance and no toxicity, does not generate harmful gas during combustion, and forms a crust after combustion, thereby protecting the inner wire core.
During the cabling process, the signal cable unit is arranged in the center of the integrated cable, the control cable core surrounds the periphery of the signal cable, the control cable core adopts digital identification, the cores are arranged in a clockwise direction from 1 to 12, and the natural number sequence is arranged in the clockwise direction. And at the same time of cabling, a layer of low-smoke halogen-free flame-retardant tape (0.2 mm) is wound on the cable core to be fastened, and the tape plays a role in heat insulation.
The fireproof layer adopts novel fireproof material ceramic polyolefin sheath material, the material is black, and the thickness is 1.0mm. The ceramic polyolefin fireproof sheath material has excellent fireproof property, can form hard ceramic hard shell under the firing of flame, is not melted and dropped in fire environment (650-3000 ℃), and has excellent heat insulation and oxygen isolation effects.
The armor layer adopts a steel-plastic composite belt (thickness is 0.25 mm), and the embossing is longitudinally wrapped. The armor layer firstly meets the requirements of buried cables, plays a role in bearing and protecting the inner cable cores, secondly, the plastic films of the steel-plastic composite belt are bonded with each other when the sheath is extruded, moisture is effectively prevented from entering the cable cores, and the radial waterproof effect of the cables is achieved. Thirdly, the biting of termites, mice and other animals on the inner wire core can be prevented.
The outer sheath is extruded on the steel-plastic belt layer in an extrusion mode, and the thickness is 2.0mm. The low-smoke halogen-free sheath material with the oxygen index of more than 35 is adopted, and the thickness is 2.0mm. The sheath material has the characteristics of high flame retardance and no toxicity, does not generate harmful gas during combustion, and forms a crust after combustion, thereby protecting the inner wire core. The addition of the repellent to the sheath material can effectively prevent biting of termites, rats and other animals. The outer sheath plays a role in protection.
The invention has the following advantages:
1. Excellent electrical insulation: the volume resistivity can reach that the volume resistivity is more than or equal to 2 multiplied by 1015 ohm cm, and the breakdown strength is more than or equal to 20kv/mm;
2. Environmental protection type: heavy metal is not present, the product is nontoxic and tasteless, and has no influence on human body and environment; prevent termite, prevent rat bite, waterproof, and oil-resistant.
3. Good heat insulation, heat conductivity coefficient of 0.09W/Mk, particularly uniform honeycomb shape inside after ablation, and better fire resistance and heat insulation;
4. The fire resistance is excellent, the fire resistance grade can reach the grade A standard of GB12666.6, namely, the 3A fuse is not fused after being burned in flame at 950-1000 ℃; the highest level of CW Z of British BS6387 can be achieved, namely C-burning 3H in 950 ℃ flame, W-spraying water, and Z-vibrating;
5. excellent waterproof performance. Due to the adoption of the steel-plastic composite belt embossing bonding longitudinal wrapping, moisture is effectively prevented from entering the cable axially, and therefore the cable has excellent axial waterproof performance.
6. Preventing animals from biting.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described above. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (7)
1. The utility model provides a fire prevention signal cable for subway which characterized in that: the signal cable comprises a cable core arranged in the middle and a cable outer protective layer wrapping the outside of the cable core, wherein the cable core is divided into a signal cable unit arranged in the center and a control cable core arranged around the signal cable unit; the cable outer protective layer comprises a wrapping tape layer, a fire-resistant layer, an armor layer and a sheath layer which are sequentially wrapped;
The inner core of the signal cable unit is a group of signal conductors, an inner double-layer fireproof insulating layer is wrapped outside each signal conductor, an inner core flame-retardant wrapping layer and a sheath are wrapped outside the inner core, and an inorganic filling layer is filled between the inner core and the inner core flame-retardant wrapping layer; 8-20 control cable cores are distributed on the periphery of the signal cable unit, each control cable core comprises a control conductor arranged in the middle, and an outer double-layer fireproof insulating layer is wrapped around the control conductor;
The inorganic filling layer is made into a cylindrical inorganic filling guide post structure which is respectively arranged between two signal conductors, the ratio of the diameter of the inorganic filling guide post structure to the diameter of the signal conductors is 1:1.5, and the inorganic filling guide post structure is made of glass fiber ropes and low-smoke halogen-free materials;
Elastic fireproof sealant is arranged between the inorganic filling guide pillar structure and the signal conductor and between the inorganic filling guide pillar structure and the inner core flame-retardant wrapping tape layer, and strip-shaped or spiral elastic fireproof sealant is arranged on the outer surface of the inorganic filling guide pillar structure and the outer surface of the signal conductor;
The inner core of the signal cable unit is formed by twisting 2-5 signal conductors into a cable, each signal conductor is formed by twisting 25-32 oxygen-free copper wire bundles with the outer diameter of 0.23-0.25mm, the inner double-layer fireproof insulating layer comprises an inner first insulating layer and an inner second insulating layer, the inner first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the inner second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the inner first insulating layer to the inner second insulating layer is 1:2-3.5; the inner core flame-retardant wrapping tape layer is formed by wrapping low-smoke halogen-free flame-retardant wrapping tape, a braided shielding layer is arranged between the inner core flame-retardant wrapping tape layer and the sheath, and the inorganic filling layer is a glass fiber inorganic rope;
an auxiliary insulating layer is additionally arranged between the inner layer first insulating layer and the inner layer second insulating layer, the auxiliary insulating layer is in a grid shape, each grid is mutually communicated, the grids are made of grid waterproof cloth, and chlorinated rubber expansion fireproof paint is coated on the grids.
2. A fire protection signal cable for subways according to claim 1, characterized in that: the fire-resistant layer is made of ceramic polyolefin sheath material, the thickness is 0.8-1.3mm, the armor layer is formed by cladding steel-plastic composite armor tape, the sheath layer is formed by extruding low-smoke halogen-free sheath material on the surface of the armor layer, and the thickness ratio of the wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer is 1:2.5:1.2:3.
3. A fire protection signal cable for subways according to claim 1, characterized in that: the control conductor is made of oxygen-free copper wire monofilaments, the outer double-layer fireproof insulating layer comprises an outer first insulating layer and an outer second insulating layer, the outer first insulating layer is formed by wrapping mineral insulation fireproof wrapping tape, the outer second insulating layer is formed by extruding ceramic polyolefin fireproof insulating materials, and the thickness ratio of the outer first insulating layer to the outer second insulating layer is 1:1.5-2.5.
4. The process for manufacturing the fireproof signal cable for the subway according to claim 1, wherein the process comprises the following steps of: the process comprises the following steps: a. manufacturing a signal cable unit, forming a signal conductor by adopting oxygen-free copper wire bundles, extruding an inner double-layer fireproof insulating layer on the surface of the signal conductor, and twisting 2-5 signal conductors into a cable according to clockwise arrangement; b, manufacturing a control cable core, manufacturing a control conductor by adopting an oxygen-free copper wire monofilament, and extruding an external double-layer fireproof insulating layer outside the control conductor; c. the signal cable units and the control cable cores obtained in the processes a and b are combined into a cable, the signal cable units are placed at the center of the cable, 8-20 control cable cores are arranged around the signal cable units in a surrounding mode, the control cable cores adopt digital marks, the control cable cores are arranged in a clockwise direction, and the cable is formed by wrapping a wrapping layer outside the control cable cores and is fastened; d. and sequentially wrapping the fire-resistant layer, the armor layer and the sheath layer outside the wrapping band layer to finish the manufacture of the fireproof signal cable.
5. The process for manufacturing the fireproof signal cable for the subway as claimed in claim 4, wherein: in the step a, each signal conductor is formed by twisting 25-32 oxygen-free copper tows with the outer diameter of 0.23-0.25mm, the inner double-layer fireproof insulating layer comprises an inner-layer first insulating layer and an inner-layer second insulating layer, the inner-layer first insulating layer is formed by wrapping a mineral insulation fireproof wrapping tape, the inner-layer second insulating layer is formed by extruding a ceramic polyolefin fireproof insulating material, and the thickness ratio of the inner-layer first insulating layer to the inner-layer second insulating layer is 1:2-3.5; the outside of the inner core is wrapped with an inner core flame-retardant wrapping tape layer and a sheath, an inorganic filling layer is filled between the inner core and the inner core flame-retardant wrapping tape layer, a braided shielding layer is arranged between the inner core flame-retardant wrapping tape layer and the sheath, and the inorganic filling layer is a glass fiber inorganic rope.
6. The process for manufacturing the fireproof signal cable for the subway as claimed in claim 4, wherein: in the step b, the control conductor is made of oxygen-free copper wire monofilaments with the outer diameter of 1.38mm, the outer first insulating layer is formed by wrapping mineral insulation fireproof wrapping tape, the outer second insulating layer is formed by extruding ceramic polyolefin fireproof insulating material, and the thickness ratio of the outer first insulating layer to the outer second insulating layer is 1:1.5-2.5.
7. The process for manufacturing the fireproof signal cable for the subway as claimed in claim 4, wherein: the fire-resistant layer is made of ceramic polyolefin sheath material with the thickness of 0.8-1.3mm, the armor layer is formed by cladding steel-plastic composite armor tape, the sheath layer is extruded on the surface of the armor layer by adopting low-smoke halogen-free sheath material, and the thickness ratio of the wrapping tape layer, the fire-resistant layer, the armor layer and the sheath layer is 1:2.5:1.2:3.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN205318928U (en) * | 2016-01-27 | 2016-06-15 | 中缆之友信息科技股份(上海)有限公司 | High -rise building is with intelligent fireproof cable of fleing of reporting to police |
| 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 |
| CN205751652U (en) * | 2016-07-06 | 2016-11-30 | 宝上电缆有限公司 | A kind of Novel fire-resistant controls cable |
| CN207097479U (en) * | 2017-06-14 | 2018-03-13 | 扬州曙光电缆股份有限公司 | A kind of dynamic control composite fire retardant fire-proof Water-proof mouse ant flexible cable of track traffic |
| 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 |
-
2018
- 2018-09-07 CN CN201811045226.8A patent/CN109036652B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN205318928U (en) * | 2016-01-27 | 2016-06-15 | 中缆之友信息科技股份(上海)有限公司 | High -rise building is with intelligent fireproof cable of fleing of reporting to police |
| CN205751652U (en) * | 2016-07-06 | 2016-11-30 | 宝上电缆有限公司 | A kind of Novel fire-resistant controls cable |
| CN207097479U (en) * | 2017-06-14 | 2018-03-13 | 扬州曙光电缆股份有限公司 | A kind of dynamic control composite fire retardant fire-proof Water-proof mouse ant flexible cable of track traffic |
| 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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