CN2793883Y - Fire-proofing digital signalling cable for traffic track - Google Patents
Fire-proofing digital signalling cable for traffic track Download PDFInfo
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- CN2793883Y CN2793883Y CNU2005200706957U CN200520070695U CN2793883Y CN 2793883 Y CN2793883 Y CN 2793883Y CN U2005200706957 U CNU2005200706957 U CN U2005200706957U CN 200520070695 U CN200520070695 U CN 200520070695U CN 2793883 Y CN2793883 Y CN 2793883Y
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Abstract
The utility model relates to a fire-proofing digital signal cable for track traffic, which belongs to the technical field of cables. The outer surface of a conductor is provided with a composite insulating layer of an extruded layer of expanded polyethylene insulating materials and a lapping layer of fine synthetic-mica belt materials. Binding yarn, a longitudinal cladding, an internal shielding layer and a lapping layer are orderly arranged on four wire groups of the conductor provided with the composite insulating layer. An inner sheath, an armour and an oversheath are orderly arranged on a stranding and cabling cable core. The utility model has the advantages of reasonable structure and stable transmission performance. The utility model is suitable for connecting associated equipment and a control device in a track traffic signal system, and the transmission of system control information and electric energy of 1MHz (analog signals), 2 Mbit/s (digital signals), alternate current with rated voltage of 750V or direct current with alternate current of 1100V and less than 750V or 1100V. The utility model is especially suitable for safety system equipment of inside fire of light rails, subways, etc. and safety system equipment of closed places with dense people.
Description
Technical field
The utility model relates to the structure of the fire safe type cable that a kind of track traffic uses, and belongs to the cable technology field.
Background technology
Along with the arrival of information age, greatly developing information technology and extensive use electronic computer has been the modern important symbol of track traffic.As rail communication is that the track circuit technology of main body has been upgraded notion and enlarged its range of application of development, in rail traffic signal system, adopt computer control, detection technique, to realize multitask, many information real-time automatic collecting and processing, guaranteeing under the safe prerequisite, improve automatization level and shipping height commander efficient, to satisfy the track traffic high speed better, efficiently to reach safe operation and requirement.
Urban track traffic is generally being risen, but because its environment particularity, this just requires to build units such as merchant, operator, design and installation and pays attention to considering its fail safe.Because track traffic has characteristics such as personnel concentrate, the volume of the flow of passengers is big, channel outlet is placed restrictions on, in case have an accident, consequence is hardly imaginable.Show according to the interrelated data statistics, in the accident that subway takes place, the most serious in recent years with fire.In case the subway breaking out of fire, power communication system is interrupted at once, and illumination, communication are all interrupted, and this not only allows the people in the fire be difficult to flee from dangerous situation, and also rescuing to the fire fighter makes troubles.Ground is underground can't be linked up, and allows causality loss increase virtually.Be anti-fire, the digital signal fire-resisting cable is used in requirement in some major construction projects, fire-resisting cable has good fire-resistance property, effectively improves the overload capacity of circuit, particularly when breaking out of fire, can guarantee the integrality in short-term of circuit, make things convenient for withdrawing of personnel to handle with fire-fighting emergent.
Existing digital signal cable mainly is made of conductor, insulating barrier, screen and sheath etc., conductor diameter is little, and employing soft copper silk, not only conductor is yielding, wrapped easily loose when wrapped mica band, and mica layer also comes off easily, thereby causes the electric property of cable also to be difficult to be guaranteed.
The utility model content
The purpose of this utility model is exactly be to adapt to the needs of track traffic development with cable, a kind of fire resistance is provided good track traffic fire safe type digital signal cable.
The purpose of this utility model is to realize like this, track traffic fire safe type digital signal cable, comprise conductor, insulating barrier, screen and sheath, the outer surface that it is characterized in that conductor is provided with composite insulation layer, on the line group (quad) of four conductors that are provided with composite insulation layer, be provided with successively and prick yarn, vertical covering, internal shield and lapping layer and constitute line group cable, on the cable core of two stranded strandings of line group cable, be provided with inner sheath, armour and oversheath successively.Four arrangement position quadrates that are provided with the conductor of composite insulation layer of described line group.Described composite insulation layer extrudes the layer and the synthetic mica carrying material lapping layer of high-quality for the polyethylene foamed Insulation Material, and the polyethylene foamed Insulation Material is extruded in the outer surface of conductor, and the synthetic mica carrying material of high-quality is wrapped on inner insulating layer.The material of described bundle yarn, vertical covering and lapping layer is the polyester band.Described internal shield is the copper strips lapping layer.
The dual composite insulation layer of wrapped flame retardant coating again after adopting the extruded insulation layer on the conductor is realized the fire-resistance property of digital signal cable, improves the quality of fire-resisting cable.The polyethylene foamed Insulation Material is adopted in interior insulation, utilizes the three-layer co-extruded physical foam insulation technology of skin-bubble-Pi, and insulated wire cores has high foaming rate in making.After extruding polyethylene foamed (PE) insulating barrier on the conductor, the core external diameter increases, hardness also increases simultaneously, when the processing flame retardant coating, be easy to realize around-packing technology like this, in addition, because of core hardness increases, when wrapped mica tape, can not make the conductor diameter distortion, help improving the crudy of cable, guarantee the electric property parameter index of cable.After testing, track traffic is satisfied following main economic and technical indices with the fire safe type digital signal cable:
1, fire-resistant combustibility meets the regulation of GB/T19216.11 and GB/T19216.23, and promptly cable guarantees that not only digital data transmission is accurate when flame temperature is not less than 750 ℃ of burnings, can also guarantee its refractory ability of 90 minutes simultaneously;
2, conductor DC resistance :≤23.5 Ω/km 20 ℃ the time;
3, insulation resistance (100-500V) 〉=10000M Ω km;
4, two lines are to D.C. resistance imbalance≤1.0%;
5, cable capacitance: (non-shield type) quad 29 ± 2nF/km;
(shield type) quad 27 ± 2nF/km;
Single insulated wire cores is to being connected to electric capacity≤70nF/km between other insulated wire cores of ground;
6, capacitive coupling coefficient k1: mean value≤81pF/1000m; Maximum≤330pF/1000m;
7, near-end crosstalk attenuation: 150kHz :≤61dB/km; 1000kHz :≤40dB/km;
8, far-end crosstalk attentuation: 150kHz :≤68dB/km; 1000kHz :≤40dB/km;
9, shielding factor (50Hz): composite sheath≤0.8, aluminium sheath≤0.2.
The utility model is rational in infrastructure, and conductor adopts the anaerobic round copper wire, guarantees that the transmission performance of cable is stable.The polyethylene foamed Insulation Material is adopted in interior insulation, utilizes the three-layer co-extruded physical foam insulation technology of skin-bubble-Pi, and insulated wire cores has high foaming rate in making, mechanical strength is higher, makes cable have low electric capacity, hangs down decay; External insulation (refractory insulating layer) adopts wrapped synthetic mica tape, makes cable have fire resistance preferably.Adopt the quad structure, make quad position quadrate, cross-talk is little between the line group, thereby guarantees the electric property of line group, to satisfy the different transmission performance requirements of cable.The shielding of employing copper strips has anti-strong electromagnetic, and transmitting audio signal and digital signal satisfy the requirement that cable transmits same signal simultaneously simultaneously.Adopt suitable twisting pitch, and with band cable core is carried out fine pith and tie up,, help improving the interference free performance of cable to stablize the structure of each line group of cable core.Be applicable to the connection between the relevant devices and control device in the rail traffic signal system, can realize that 1MHz (analog signal), 2Mbit/s (digital signal) and rated voltage exchange the transmission of 750V or direct current 1100V and following system control information and electric energy.Be specially adapted to inside fire safety system equipment such as light rail, subway and the place safety system equipment of the crowd is dense sealing.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Among the figure: 1 conductor, 2 inner insulating layers, 3 refractory insulating layers, 4 are pricked yarn, 5 vertical coverings, 6 internal shields, 7 lapping layers, 8 strandings, 9 inner sheaths, 10 armours, 11 oversheaths.
Embodiment
Extrude polyethylene foamed inner insulating layer 2 on the conductor 1 of anaerobic round copper wire, the synthetic mica tape refractory insulating layer 3 of wrapped high-quality constitutes insulated single wire on inner insulating layer 2.Thoroughly do away with the line group that the edge single line is combined into the position quadrate with four, prick yarn 4 (employing polyester band is wrapped) on online group earlier, adopt double-deck polyester band vertically to be rolled into vertical covering 5 then, wrapped copper strips internal shield 6 on vertical covering 5, wrapped double-deck polyester band lapping layer 7 constitutes line group cable on internal shield 6 again.With two stranded strandings 8 of line group cable, for stablizing the structure of each line group of cable core, adopt suitable twisting pitch, and with band cable core is carried out fine pith and tie up.On the cable core of stranded stranding, adopt polyethylene to extrude inner sheath 9, on inner sheath 9, adopt the wrapped armour 10 of double-deck superconduction magnet steel band gap, on armour 10, extrude polyethylene oversheath 11.
Claims (5)
1, a kind of track traffic fire safe type digital signal cable, comprise conductor, insulating barrier, screen and sheath, the outer surface that it is characterized in that conductor is provided with composite insulation layer, on the line group of four conductors that are provided with composite insulation layer, set gradually and prick yarn, vertical covering, internal shield and lapping layer and constitute line group cable, on the cable core of two stranded strandings of line group cable, be provided with inner sheath, armour and oversheath successively.
2, track traffic according to claim 1 fire safe type digital signal cable is characterized in that four arrangement position quadrates that are provided with the conductor of composite insulation layer of described line group.
3, track traffic according to claim 1 fire safe type digital signal cable, it is characterized in that described composite insulation layer extrudes the synthetic mica carrying material lapping layer of layer and high-quality for the polyethylene foamed Insulation Material, the polyethylene foamed Insulation Material is extruded in the outer surface of conductor, and the synthetic mica carrying material of high-quality is wrapped on inner insulating layer.
4, track traffic according to claim 1 fire safe type digital signal cable is characterized in that the material of described bundle yarn, vertical covering and lapping layer is the polyester band.
5, track traffic according to claim 1 fire safe type digital signal cable is characterized in that described internal shield is the copper strips lapping layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200706957U CN2793883Y (en) | 2005-04-13 | 2005-04-13 | Fire-proofing digital signalling cable for traffic track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200706957U CN2793883Y (en) | 2005-04-13 | 2005-04-13 | Fire-proofing digital signalling cable for traffic track |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2793883Y true CN2793883Y (en) | 2006-07-05 |
Family
ID=36821023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200706957U Expired - Fee Related CN2793883Y (en) | 2005-04-13 | 2005-04-13 | Fire-proofing digital signalling cable for traffic track |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2793883Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943185A (en) * | 2014-03-06 | 2014-07-23 | 安徽华成电缆有限公司 | Control armor wire for automobile industry |
-
2005
- 2005-04-13 CN CNU2005200706957U patent/CN2793883Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943185A (en) * | 2014-03-06 | 2014-07-23 | 安徽华成电缆有限公司 | Control armor wire for automobile industry |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060705 Termination date: 20100413 |