CN203376988U - Alloy sheath railway through ground wire - Google Patents
Alloy sheath railway through ground wire Download PDFInfo
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- CN203376988U CN203376988U CN201320469940.6U CN201320469940U CN203376988U CN 203376988 U CN203376988 U CN 203376988U CN 201320469940 U CN201320469940 U CN 201320469940U CN 203376988 U CN203376988 U CN 203376988U
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- nickel dam
- tin layer
- plated
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Abstract
The utility model relates to an alloy sheath railway through ground wire, which comprises stranded conductors and an alloy sheath layer covered outside the stranded conductors, wherein the alloy sheath layer comprises an aluminum alloy layer, the inner surface of the aluminum alloy layer is plated by a first nickel layer, the outer surface of the aluminum alloy layer is plated by a second nickel layer, the inner surface of the first nickel layer is plated by a first tin layer, and the outer surface of the second nickel layer is plated by a second tin layer; and the inner surface of the first tin layer is contacted with the stranded conductors. The alloy sheath railway through ground wire has the beneficial effects that electrochemical corrosion caused by different electrode potentials between copper and aluminum can be avoided, corrosion imposed on the aluminum alloy sheath by external acid, alkali, salt and the like can be put off, and the service life is prolonged. In addition, materials for manufacturing the alloy sheath layer are low in cost, easy to process, environmental friendly and pollution-free.
Description
Technical field
The utility model relates to a kind of ground wire that the railway system is used, specifically a kind of alloy sleeve railway run-through ground line.
Background technology
Along with the high speed development of railway system's construction technique and facility, train running speed is more and more faster, and railways train operation commander's automation and fail safe are had higher requirement.The ground wire of perforation is laid in requirement along the trunk railway total length, form comprehensive underground system, in order to guarantee to realize that equipotential connects between each system such as communication, signal, electric power, traction power supply and equipment, eliminate between distinct device and system due to the electromagnetic interference that exists potential difference to cause and potential safety hazard that the person or equipment are caused.For meeting the backflow needs, guarantee that the system equipment security of operation is reliable and stable in addition.
The alloy sleeve that the ground wire of trunk railway is laid in the perforation with alloy sleeve of using at present is mainly two kinds of aluminum alloy sheath and copper alloy sheaths.The center of two kinds of sheaths all is wrapped in the stranded conductor formed by 7 or the more soft circular copper wires of TR type (being annealed copper wire) concentric stranding.The ground wire with described two kinds of alloy sleeves used has respectively following shortcoming: there is the problem of the electrochemical corrosion caused due to the electrode potential difference between copper, two kinds of metals of aluminium in the ground wire with aluminum alloy sheath, can accelerate corrosion when aluminium alloy protecting is enclosed within the cross-current overcurrent; Ground wire with copper alloy sheath adopts copper alloy band, there is the distortion difficulty in the course of processing, welding performance is unstable, working ability is low continuously, and copper alloy sheath continuously inactivating technology realizes that difficulty is large, cost is high and the price of copper alloy belt is higher, causes the production cost of product too high.
The utility model content
For solving the technical problem of above-mentioned existence, the purpose of this utility model is to provide a kind of low cost of manufacture, corrosion-resistant, continuously the strong ground wire of working ability.
The technical scheme in the invention for solving the technical problem is: a kind of alloy sleeve railway run-through ground line, comprise stranded conductor and be coated on the outer alloy protective jacket layer of described stranded conductor, its special feature is, described alloy protective jacket layer comprises aluminium alloy layer, described aluminium alloy layer inner surface is coated with the first nickel dam, the aluminium alloy layer outer surface is coated with the second nickel dam, the inner surface of described the first nickel dam is coated with the first tin layer, and on described the second nickel dam outer surface, plating is provided with the second tin layer; The inner surface of the first tin layer contacts with described stranded conductor.
As the further technical scheme of the utility model: described aluminium alloy layer and the first nickel dam, the second nickel dam, the first tin layer, the gross thickness that the second tin is stacked after adding are 1mm, the thickness of wherein said the first nickel dam, the second nickel dam is 0.5 μ m, and the thickness of described the first tin layer, the second tin layer is 2 μ m.
The beneficial effects of the utility model are: it can be avoided between copper, two kinds of metals of aluminium due to the different electrochemical corrosion that cause of electrode potential, and can delay the corrosion to aluminum alloy sheath such as extraneous acid, alkali, salt, improve useful life, and prepare cheap, the easy processing of the cost of raw material, environment friendly and pollution-free of this alloy protective jacket layer.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described further:
The radial section schematic diagram that Fig. 1 is a kind of embodiment of the utility model;
In figure: 1 stranded conductor, 11 soft circular copper wires, 2 alloy protective jacket layers, 21 aluminium alloy layers, 22 first nickel dams, 23 first tin layers, 24 second nickel dams, 25 second tin layers.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of alloy sleeve railway run-through ground line, comprise stranded conductor 1 and be coated on the outer alloy protective jacket layer 2 of described stranded conductor 1, described alloy protective jacket layer 2 comprises aluminium alloy layer 21, described aluminium alloy layer 21 inner surfaces are coated with the first nickel dam 22, aluminium alloy layer 21 outer surfaces are coated with the second nickel dam 24, the inner surface of described the first nickel dam 22 is coated with the first tin layer 23, and on the outer surface of described the second nickel dam 24, plating is provided with the second tin layer 25; The inner surface of the first tin layer 23 contacts with described stranded conductor 1.
Gross thickness after described aluminium alloy layer 21 and the first nickel dam 22, the second nickel dam 24, the first tin layer 23, the second tin layer 25 stack is 1mm, the thickness of wherein said the first nickel dam 22, the second nickel dam 24 is 0.5 μ m, and the thickness of described the first tin layer 23, the second tin layer 25 is 2 μ m.
In the embodiment shown in fig. 1, described stranded conductor 1 is that soft circular copper wire 11 concentric strandings by seven TR types form, and stranded mode adopts is existing one to add the stranded form of six formulas.
The alloy protective jacket layer 2 coated at described stranded conductor 1 outer surface is using the aluminum alloy strip section bar as Base Material, for meeting the reliability and stability of the zinc-plated processing performance of aluminium and tin coating, the nickel dam (being in plated nickel dam is wrapped in aluminum alloy strip) of preferential whole plated surface one deck 0.5 μ m at aluminum alloy strip, then the further tin layer of plating one deck 2 μ m (be plated tin layer will be wrapped in nickel dam on aluminum alloy strip is coated in) on the whole surface of nickel dam, because zinc-plated and alloy is a kind of good weldability and has the coating of certain anti-corrosion capability, at electronic component, extensive use in printed wiring board.The preparation of tin layer except the Physicals such as hot dipping, spraying, the methods such as plating, immersion plating and chemical plating because of simple in industrial extensive use.
Can obtain alloy sleeve weldable aluminum alloy band section bar used through above technical process.Then after plating the aluminum alloy strip section bar longitudinal curl distortion of tin layer, by soldering or argon arc welding equipment, the longitudinal slot of curling rear vertical formation is welded, make it become the outside that seamless zinc-plated aluminium-alloy pipe is coated on described stranded conductor 1; Aluminium-alloy pipe after finally by technical processs such as drawing, cleaning, annealing, making this zinc-plated closely is coated on the outer surface of described stranded conductor 1, forms alloy protective jacket layer 2.By drawing process, reduced the resistance of this ground wire unit length, improve performance.Adopt this alloy protective jacket layer 2 both can avoid copper conductor directly to contact caused electrochemical corrosion with aluminium alloy, can delay again acid, alkali, salt etc. in external environment be corrosive can compound to the corrosion of aluminum alloy sheath, the useful life of having improved ground wire.Produce strong, the soft easily construction of corrosion resistance, comprehensive physical and the good ground wire with alloy sleeve of electrical property.
It should be noted that, the specification of described stranded conductor 1 can be different, and described stranded conductor 1 can be formed by 19 or the TR type of other odd number or soft circular copper wire 11 concentric strandings of other model.
Claims (2)
1. an alloy sleeve railway run-through ground line, comprise stranded conductor (1) and be coated on the outer alloy protective jacket layer (2) of described stranded conductor (1), it is characterized in that: described alloy protective jacket layer (2) comprises aluminium alloy layer (21), described aluminium alloy layer (21) inner surface is coated with the first nickel dam (22), aluminium alloy layer (21) outer surface is coated with the second nickel dam (24), the inner surface of described the first nickel dam (22) is coated with the first tin layer (23), and on the outer surface of described the second nickel dam (24), plating is provided with the second tin layer (25); The inner surface of the first tin layer (23) contacts with described stranded conductor (1).
2. a kind of alloy sleeve railway run-through ground line according to claim 1, it is characterized in that: the gross thickness after described aluminium alloy layer (21) superposes with the first nickel dam (22), the second nickel dam (24), the first tin layer (23), the second tin layer (25) is 1mm, the thickness of wherein said the first nickel dam (22), the second nickel dam (24) is 0.5 μ m, and the thickness of described the first tin layer (23), the second tin layer (25) is 2 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469940.6U CN203376988U (en) | 2013-08-02 | 2013-08-02 | Alloy sheath railway through ground wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469940.6U CN203376988U (en) | 2013-08-02 | 2013-08-02 | Alloy sheath railway through ground wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203376988U true CN203376988U (en) | 2014-01-01 |
Family
ID=49839503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320469940.6U Expired - Lifetime CN203376988U (en) | 2013-08-02 | 2013-08-02 | Alloy sheath railway through ground wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203376988U (en) |
-
2013
- 2013-08-02 CN CN201320469940.6U patent/CN203376988U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |