CN102110497A - Foaming railway axis-counting cable - Google Patents
Foaming railway axis-counting cable Download PDFInfo
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- CN102110497A CN102110497A CN2009102151221A CN200910215122A CN102110497A CN 102110497 A CN102110497 A CN 102110497A CN 2009102151221 A CN2009102151221 A CN 2009102151221A CN 200910215122 A CN200910215122 A CN 200910215122A CN 102110497 A CN102110497 A CN 102110497A
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Abstract
The invention relates to a foaming railway axis-counting cable which comprises a cable core and a jacket wrapped at the periphery of the cable core, wherein the cable core comprises at least one communication cable unit and one signal cable unit; each communication cable unit comprises a plurality of single cables and cotton wrappings wrapped at the periphery of the single cables; each single cable comprises a conductor and an insulation layer wrapped at the periphery of the conductor; the insulation layer is in a skin-foam-skin structure composed of an inner skin layer, a foaming layer and an outer skin layer which are sequentially wrapped from inside to outside; and an inner wrapping belt, an aluminum-plastic shielding layer and an outer wrapping belt are sequentially wrapped at the periphery of the cotton wrapping of each communication cable unit. By using the skin-foam-skin three-layer structure as the insulation layer of each single cable in the communication cable unit of the axis-counting cable provided by the invention, the formed cable has the advantages of interference rejection, low attenuation, low crosstalk, stable electrical performance, long transmission distance and the like. By wrapping the aluminum-plastic composite film layer outside the communication cable unit, the invention ensures the stable transmission through the communication cable unit, thereby being suitable for wide popularization and application in the railway industry.
Description
Technical field
The present invention relates to a kind of railway meter axle shielded type cable.
Background technology
In the China railways industry, the railway axle counting system is generally used, and the meter shaft cable is used in being connected between the relevant devices and control device in the railway signal system, is used for transmission and the railway telecommunications systems transmitting audio signal and the digital signal of specified interchange 500V or direct current 1000V and following control information and electric energy.
Existing railway meter shaft cable comprises cable core, be coated on the outer sheath of cable core, usually in the cable core two groups of 0.9mm LF communication quads are arranged, two groups of 1.0mm signal quads, sometimes also comprise line or single line, the communication quad is used for voice communication, the signal quad is used for scheduling, monitoring, signal or electric energy transmitting such as locomotive, the meter shaft cable mainly is the principle according to locomotive wheel cutting magnetic line, there is four wheels to count according to a compartment, the wheel number of wheel number that assurance is entered the station and departures is identical or different, whether two stations between have car, or have car that several cars are arranged if judging.Usually the insulating barrier of each single line is solid polyethylene insulation in the communication quad of railway meter shaft cable, the shortcoming of solid insulation is that mutual capacitance is big, decay is big, transmission range is short, the quad of communicating by letter in addition and signal quad interact when transmission, may cause error of transmission, bring hidden danger to safety of railway traffic.
Summary of the invention
The objective of the invention is to develop a kind of anti-interference, decay is little, cross-talk is little railway meter shaft cable.
In order to reach the purpose of foregoing invention, technical scheme of the present invention is: a kind of expansion type railway meter shaft cable, comprise cable core, be coated on the sheath of cable core periphery, described cable core comprises at least one order wire group, signal line group, each described order wire group comprises a plurality of single lines, wrapped bundle yarn in a plurality of single line peripheries, described each single line comprises conductor, be coated on the insulating barrier of conductor periphery, described insulating barrier is to the outer endodermis that coats successively from nexine, foaming layer, the skin foam skin structure that exodermis is formed, the bundle yarn periphery of described each order wire group is coated with interior band successively, aluminum-plastic shielding layer, outer band.
Further, described sheath comprises band, alibate, sheath, steel band and outer jacket successively from nexine to skin, because shield clip has been established alibate, thereby makes cable core can avoid track circuit and extraneous electromagnetic interference.
Insulating barrier on the described single line adopts nitrogen to inject physical blowing skin-foam-skin insulation material.
Because the utilization of technique scheme, the present invention is by following technological merit: the insulating barrier of single line adopts the skin foam skin three-decker in the order wire group of meter shaft cable of the present invention, advantages such as the feasible cable that forms has anti-interference, low decay, cross-talk is little, electric property is stable, transmission range is long can be used on a large scale in railway systems.Simultaneously, the railway system is widely used at present is frequency-shift automatic blocking system, what adopt is to concentrate send mode, in this course, track circuit can produce adjacent line and disturb, a kind of is to produce cross-talk between the symmetrical cable that transmits, another kind is that what to transmit in the track is AC signal, track mutual inductance and the earth are sewed and are caused adjacent line to disturb, and mould laminated film by coat layer of aluminum outside the order wire group, make the transmission of order wire group stable, make the signal of transmission undistorted, indeformable, avoid adjacent line and disturb and disturb each other, thereby guarantee meter shaft cable transmission safety and reliability.
Description of drawings
Accompanying drawing 1 is railway meter shaft cable viewgraph of cross-section of the present invention;
Accompanying drawing 2 is the viewgraph of cross-section of an order wire group of meter shaft cable of the present invention;
Accompanying drawing 3 is the viewgraph of cross-section of a single line in the order wire group of meter shaft cable of the present invention;
Wherein: 1, order wire group; 11, single line; 111, conductor; 112, insulating barrier; 1121, endodermis; 1122, foaming layer; 1123, exodermis; 12, prick yarn; 13, interior band; 14, aluminum-plastic shielding layer; 15, outer band; 2, signal line group; 21, conductor; 22, solid insulating barrier; 3, sheath; 31, band; 32, alibate; 33, sheath; 34, steel band; 35, outer jacket;
Embodiment
Below in conjunction with accompanying drawing expansion type railway meter shaft cable embodiment of the present invention is elaborated:
Meter shaft cable as shown in Figure 1, comprise cable core, sheath 3, wherein, cable core 3 has the communication quad 1 of two 0.9mm, the signal quad 2 of two 1.0mm, each signal quad 2 is made up of four mutually stranded single lines and wrapped bundle yarn outside four single lines, simultaneously, every single line of signal quad 2 is made up of conductor 21 and the solid insulating barrier 22 that is extruded in conductor 21 peripheries.Communication quad 1 and signal quad 2 arrangement in accordance with regulations are twisted into cable core, cable core coats by sheath 3, the concrete structure of sheath 3 is followed successively by wrapped band 31 on above-mentioned four line groups from nexine to skin, the layer of aluminum sheath 32 of weldering outside band 31, apply one deck PURs outside the alibate 32 and extrude layer of polyethylene sheath 33, the wrapped two-layer galvanized steel strip of sheath 33 external series gaps 34 is as armour, steel band 34 outer last layers of polyethylene outer jackets 35 that extrude.Because weldering system layer of aluminum sheath in the sheath 3, thereby make cable core avoid track circuit and extraneous electromagnetic interference.
Shown in Figure 2 is the sectional view of order wire group, each order wire group 1 comprises that four mutually stranded single lines 11, four single lines are outer around pricking polyester yarn 12, pricking outside the yarn 12 band 13 in wrapped one deck, the aluminum-plastic shielding layer 14 that interior band 13 outer wrapped one deck single face aluminium foils form, screen 14 outer wrapped two-layer outer bands 15.Every single line 11 comprises the conductor 111 that is positioned at the center, be coated on the insulating barrier 112 of conductor 111 peripheries, as shown in Figure 3, wherein, insulating barrier 112 comprises endodermis 1121 successively from nexine to skin, foaming layer 1122, exodermis 1123, above-mentioned insulating barrier 112 adopts nitrogen to inject physical blowing skin-foam-skin insulation material and makes, this skin-foam-skin insulation material adopts advanced in the world skin foam skin physical foaming technology to realize, compare with chemical blowing, three-layer insulated structure by this physical blowing formation, foaming layer is even, abscess is fine and closely woven, thereby guarantees the electric property stability of single line on finished product.
In the introduction of above-mentioned order wire group 1, the screen that four single lines, 11 outsourcing one deck plastic-aluminum laminated films of order wire group 1 form, this makes that the transmission of communication quad is more stable, transmission signals is undistorted, and is indeformable.When it is applied in the railway system, track circuit can not produce adjacent line and disturb, and has further guaranteed the reliability of meter shaft cable signal transmission of the present invention.
To sum up, foaming railway axis-counting cable of the present invention has anti-interference, and transmission range is long, processing ease, and characteristics easy to use have very high promotional value.
Claims (3)
1. expansion type railway meter shaft cable, comprise cable core, be coated on the sheath (3) of cable core periphery, described cable core comprises at least one order wire group (1), signal line group (2), each described order wire group (1) comprises a plurality of single lines (11), wrapped bundle yarn (12) in a plurality of single lines (11) periphery, described each single line (11) comprises conductor (111), be coated on the insulating barrier (112) of conductor (111) periphery, it is characterized in that: the endodermis (1121) of described insulating barrier (112) for coating successively to skin from nexine, foaming layer (1122), the skin foam skin structure that exodermis (1123) is formed, bundle yarn (12) periphery of described each order wire group (1) is coated with interior band (13) successively, aluminum-plastic shielding layer (14), outer band (15).
2. expansion type railway meter shaft cable according to claim 1 is characterized in that: described sheath (3) comprises band (31), alibate (32), sheath (33), steel band (34) and outer jacket (35) successively from nexine to skin.
3. expansion type railway meter shaft cable according to claim 1 and 2 is characterized in that: the insulating barrier (112) on the described single line (11) adopts nitrogen to inject physical blowing skin-foam-skin insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102151221A CN102110497A (en) | 2009-12-24 | 2009-12-24 | Foaming railway axis-counting cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102151221A CN102110497A (en) | 2009-12-24 | 2009-12-24 | Foaming railway axis-counting cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102110497A true CN102110497A (en) | 2011-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102151221A Pending CN102110497A (en) | 2009-12-24 | 2009-12-24 | Foaming railway axis-counting cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN102110497A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830338A (en) * | 2018-12-29 | 2019-05-31 | 通鼎互联信息股份有限公司 | A kind of low-smoke bittern-free highly fire-proof integrated sheath railway signal cable |
| CN111682464A (en) * | 2020-06-29 | 2020-09-18 | 中国化学工程第十一建设有限公司 | Cable intermediate joint manufacturing construction method and high-voltage cable |
-
2009
- 2009-12-24 CN CN2009102151221A patent/CN102110497A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830338A (en) * | 2018-12-29 | 2019-05-31 | 通鼎互联信息股份有限公司 | A kind of low-smoke bittern-free highly fire-proof integrated sheath railway signal cable |
| CN111682464A (en) * | 2020-06-29 | 2020-09-18 | 中国化学工程第十一建设有限公司 | Cable intermediate joint manufacturing construction method and high-voltage cable |
| CN111682464B (en) * | 2020-06-29 | 2022-03-08 | 中国化学工程第十一建设有限公司 | Cable intermediate joint manufacturing construction method and high-voltage cable |
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20110629 |