CN208622457U - A kind of subway fire prevention signal cable - Google Patents

A kind of subway fire prevention signal cable Download PDF

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Publication number
CN208622457U
CN208622457U CN201821464359.4U CN201821464359U CN208622457U CN 208622457 U CN208622457 U CN 208622457U CN 201821464359 U CN201821464359 U CN 201821464359U CN 208622457 U CN208622457 U CN 208622457U
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layer
cable
fire
signal
signal cable
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CN201821464359.4U
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王浩淼
王成忠
刘源
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SHANGHAI RONDA CABLE (GROUP) CO Ltd
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SHANGHAI RONDA CABLE (GROUP) CO Ltd
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Abstract

The utility model 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, the fire prevention signal cable of the utility model 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

A kind of subway fire prevention signal cable
Technical field
The utility model relates to the technical field of signal cable, specifically a kind of subway fire prevention signal cable.
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 this utility model is to provide a kind of improved subway fire prevention signal cables, it can overcome the prior art Both middle signal cable and control cable can not integrate, while not have the deficiency of fire protecting performance.
To achieve the goals above, the technical solution of the utility model is: a kind of subway fire prevention signal cable, feature Be: 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 It is divided into the signal cable unit at the center of being located at and row is located at the control cable core of signal cable unit surrounding;It is protected outside cable Layer includes 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.
Compared with the existing technology, the technical solution of the utility model further includes many in addition to the improvement of overall technical architecture Improvement in terms of details, specifically, having the advantages that
1, improvement project described in the utility model, signal cable include being located at the cable core at middle part and being wrapped in cable Protective coverings of cable outside core, cable core, which is divided into the signal cable unit at the center of being located at and arranges, is located at signal cable list Signal cable and control cable are combined into one, can carry out integrated application, keep away by the control cable core of first surrounding, this design Both cables in the prior art are exempted to need to construct twice during installation, have saved installation procedure, reduce costs;
2, it in the technical solution of the utility model, is respectively equipped with outside the conductor of signal cable and control cable double-deck anti- Fiery insulating 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 is protected Dangerous silk does not fuse;Also it can reach the C highest level of Britain BS6387, i.e. C --- burn 3H in 950 DEG C of flames;
3, the utility model signal cable unit and control cable core outside successively wrap up belting layer, flame retardant coating, Armor and restrictive coating, so that the utility model has good thermal insulation, thermal coefficient 0.09W/Mk has good waterproof Performance, it is effective to prevent moisture axially into cable inside, to have excellent axial waterproof performance;
4, the fire prevention signal cable of the utility model is structurally reasonable, and easy to process and construction is laid with, and has good electricity absolutely Edge: 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 schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of the signal cable unit of the utility model.
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, in 16 Layer second insulating layer;
21 control conductors, 22 the first insulating layers of outer layer, 23 outer layer second insulating layers.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.
The utility model provides a kind of subway fire prevention signal cable, referring specifically to Fig. 1, difference with the prior art Be: 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 It is divided into the signal cable unit 1 at the center of being located at and row is located at the control cable core 2 of signal cable unit surrounding;Outside cable Sheath includes the belting layer 3 successively wrapped up, flame retardant coating 4, armor 5 and restrictive coating 6.
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 layer is glass fibers It ties up inorganic rope and low smoke and zero halogen material is made, play further flameproof effect.
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, 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 an implementation process, signal cable unit, signal cable list are provided that at the center for signal cable of preventing fires The surrounding of member is laid with 12 control cable cores (referring to Fig. 1), and each signal conductor uses 28 outer diameters for 0.24mm's Copper free wire bundle strand forms, and when making signal cable unit, two signal conductors are twisted by red blue arranged clockwise twisted synthesizing cable, The fire-retardant belting layer of wrapped one layer of inner core (using low-smoke non-halogen flame-retardant band, thickness 0.2mm) is overlapped outside cable core simultaneously, then, 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 small In 85%.Since the unit is signal cable, to prevent external power supply from interfering, using braid shielded, signal normal transmission is protected. 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, combustion 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 utility model has the advantage that
1. excellent electrical insulating property: volume resistivity 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 are prevented Water, 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., in 950 ~ 1000 DEG C of flames Middle burning 90min, 3A fuse do not fuse;Also it can reach the C W Z highest level of Britain BS6387, i.e. C --- in 950 DEG C of fire Burn 3H in flame, W --- water spray, Z --- vibration;
5. excellent waterproof performance.Due to bonding longitudinal wrap using composite steel-plastic belt embossing, it is effective prevent moisture axial into Enter inside cable, to have excellent axial waterproof performance.
6. anti-animal bites.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the utility model specific implementation is confined to these above-mentioned explanations.For the common skill of the utility model technical field For art personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, all should It is considered as belonging to the protection scope of the utility model.

Claims (5)

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.
CN201821464359.4U 2018-09-07 2018-09-07 A kind of subway fire prevention signal cable Active CN208622457U (en)

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CN201821464359.4U CN208622457U (en) 2018-09-07 2018-09-07 A kind of subway fire prevention signal cable

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Application Number Priority Date Filing Date Title
CN201821464359.4U CN208622457U (en) 2018-09-07 2018-09-07 A kind of subway fire prevention signal cable

Publications (1)

Publication Number Publication Date
CN208622457U true CN208622457U (en) 2019-03-19

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CN201821464359.4U Active CN208622457U (en) 2018-09-07 2018-09-07 A kind of subway fire prevention signal cable

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112309630A (en) * 2020-09-27 2021-02-02 新亚特电缆股份有限公司 Subway cable of ageing resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112309630A (en) * 2020-09-27 2021-02-02 新亚特电缆股份有限公司 Subway cable of ageing resistance

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