CN201673692U - Tin-plated pure copper contact line for electrified railway contact system - Google Patents

Abstract

The utility model relates to a tin-plated pure copper contact line for an electrified railway contact system, which comprises a contact line body (1), the contact line body (1) is made of pure copper, and the tin-plated pure copper contact line is characterized in that the contact line body (1) is shaped like a gourd, grooves (1.1) are arranged on two sides, and a tin-plated layer (2) is arranged on the surface of the contact line body (1). As the tin-plated layer is electroplated on the surface of the copper contact line, the tin-plated pure copper contact line for the electrified railway contact system can ensure the conductive effect, simultaneously isolate the direct contact between copper and an aluminum conductor, eliminate the environment of producing electrolyte, improve the corrosion resistance, simultaneously reduce the difference between the elastic modulus and the coefficient of thermal expansion of raw copper and aluminum, reduce the contact resistance, prevent the production of local high temperature and further ensure the safety of the railway contact system.

Description

Electrification railway contact net is with zinc-plated fine copper contact wire

(1) technical field

The utility model relates to a kind of electrification railway contact net with zinc-plated fine copper contact wire.

(2) background technology

The fine copper contact wire is mainly used in low speed railway contact line, traction networking, mine, city trolley bus with in the contact line.Because running velocity is low in this class contact line, but the density of vehicle is big, so the ampacity height that needs, therefore the fine copper contact wire needs outside certain tensile strength, excellent electric conductivity also need be arranged, satisfying big current load needs, thereby guarantee this contact line operation and safety.

And the baffler that contacts with contact line uses aluminum products in a large number, when the copper contact wire directly is connected with aluminium conductor, the contact-making surface of these two kinds of metals very easily forms electrolyte under the effect of water in air branch, carbon dioxide and other impurity, thereby what form is that negative pole, copper are anodal primary cell with aluminium, make aluminium produce couple corrosion, cause the contact resistance of copper, aluminium junction to increase.In addition,, be in operation after cold cycling (energising and outage) repeatedly, can make the contact point place produce bigger gap and influence contact, also increased contact resistance because the modulus of elasticity and the thermal coefficient of expansion of copper, aluminium differ greatly.The increase of contact resistance, the temperature that will cause in service raises.Corrosion oxidation will aggravate under the high temperature, produces vicious circle, and quality of connection is further worsened, and causes the contact point temperature too high even accident such as can smolder, burn at last, causes whole contact net system paralysis.Therefore be necessary to design a kind of novel contact wire that can the contact corrosion of fine solution copper aluminium, thereby guarantee railway contact line safety.

(3) summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of and prevents that electrification railway contact net that burn into guarantees railway contact line safety is with zinc-plated fine copper contact wire.

The purpose of this utility model is achieved in that a kind of electrification railway contact net is with zinc-plated fine copper contact wire, it comprises the contact wire body, described contact wire body material is a fine copper, it is characterized in that: described contact wire body is Pear-Shaped, both sides are provided with groove, and described contact wire body surface is provided with tin coating.

The utility model electrification railway contact net with the beneficial effect of zinc-plated fine copper contact wire is: at copper contact wire electroplating surface one deck tin coating, when guaranteeing conductive effect, completely cut off and copperly directly contacted, eliminated the environment of the liquid that produces electrolysis, improved corrosion resistance with aluminium conductor; Dwindled the poor of the modulus of elasticity of native copper, aluminium and thermal coefficient of expansion simultaneously, reduced contact resistance, prevented the generation of localized hyperthermia, thereby guaranteed railway contact line safety.

(4) description of drawings

Fig. 1 for the utility model electrification railway contact net with zinc-plated fine copper contact wire structural representation.

Among the figure: contact wire body 1, groove 1.1, tin coating 2.

(5) embodiment

Referring to Fig. 1, a kind of electrification railway contact net that the utility model relates to is with zinc-plated fine copper contact wire, comprise contact wire body 1, described contact wire body 1 material is a fine copper, described contact wire body 1 is Pear-Shaped, both sides are provided with groove 1.1, and described contact wire body 1 surface forms tin coating 2 by electroplating processes.

Claims (1)

1. an electrification railway contact net is with zinc-plated fine copper contact wire, it comprises contact wire body (1), described contact wire body (1) material is a fine copper, it is characterized in that: described contact wire body (1) is Pear-Shaped, both sides are provided with groove (1.1), and described contact wire body (1) surface is provided with tin coating (2).

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