JPH0143306Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to the improvement of a rigid electric train track for supplying power to running vehicles such as subways and monorails.

As shown in Figure 1, this type of conventional rigid electric train line consists of an aluminum rigid body with a T-shaped cross section and a unit length of about 10 m.
A rigid body 10 having a unit length of 100 m to 200 m is formed by welding and connecting in the longitudinal direction at the installation site, and long copper contact wires 12, 12 are attached to the dovetail-shaped protrusion 11 formed on the lower end surface of the rigid body 10. Locking groove 1 formed on the upper end of
2a, and the claw portion 1 of a plurality of relatively short aluminum ears 13 is engaged with the other locking groove 12b.
3a, and tighten the ear 13 to the rigid body 10 via the bolt 14 and nut 15, and then tighten the contact wire 1.
2 and 12, and the rigid body 10 is attached as shown in FIG.
The electrical connection between the contact wires 12 and 12 is made by connecting fittings 16, 12 at both ends of the long rigid body 10 which is welded.
It was carried out by 16. In such a conventional rigid overhead contact line, in order to prevent electrolytic corrosion occurring between dissimilar metals between the aluminum rigid body 10 and the copper contact wire 12 and between the ears 13 and the copper contact wire 12, the aluminum rigid body 10 and the copper contact wire 12 are The contact surface and the entire surface of the ear 13 or the contact surface with the contact wire 12 were coated with an insulating anti-corrosion paint made of epoxy resin or the like. Therefore, in the event that a train stops in the middle of the tramway and a large current is collected for some reason, the copper contact wire 12 and the aluminum rigid body 10 can be insulated with anti-corrosion paint. Therefore, the contact wire 12 alone bears this large current, and there is a risk that the contact wire 12 may be softened or deformed by the Joule heat. In addition, there were other problems such as the need to increase the size of the contact wire 12 and the connecting fittings 16, 16 between the rigid body 10 and the contact wire 12 in preparation for the above-mentioned accident.

The present invention was devised in view of the above points, and one embodiment illustrating the invention will be described below.
In Figures 1 to 5, reference numeral 1 denotes a rigid body made of aluminum with a T-shaped cross section of approximately 10 m in length and connected by welding in the longitudinal direction at the installation site to form a unit length of 100 to 200 m. A dovetail-shaped protrusion 2 is formed in the longitudinal direction, and the dovetail-shaped protrusion 2 that contacts the entire surface of the rigid body 1 or the contact wire is coated with an insulating anticorrosion paint made of epoxy resin or the like. 3 and 3 are two long copper contact wires having locking grooves 3a and 3b on both sides of the upper end; 4 is a locking groove 3b of the contact wire 3;
A plurality of relatively short aluminum ears each having a claw portion 4a that engages with the contact wire 3.The entire surface of the ear 4 or the portion of the claw portion 4a that engages with the locking groove 3b of the contact wire 3 is provided with an insulating anti-corrosion material. It is coated with paint or anodized. Reference numeral 5 denotes a plurality of relatively short bare ears made of aluminum having claw portions 5a that engage with the locking grooves 3b of the contact wires 3, 3, and the bare ears 5 are coated with the anti-corrosion coating as shown in FIG. The ears 4 are interposed at appropriate intervals between a plurality of ears 4 that have been subjected to equal surface treatment, and the long rigid body 1 and the contact wire 3 are electrically connected to each other at appropriate intervals. If necessary, apply conductive anti-corrosive oil to the entire surface of the bare ear 5 or its claw portion 5a, or apply insulating anti-corrosive paint to the ground except for the contact surfaces with the rigid body 1 and the contact wire 3. Good too. 6 is an intermediate potential between copper and aluminum, such as tin foil, interposed between the claw portion 5a of the aluminum bare ear 5 and the locking groove 3b of the copper contact wire 3 to prevent electrolytic corrosion between the two. 7 and 8 are bolts and nuts that fasten the ears 4 and bare ears 5 to the rigid body 1, and 9 and 9 are the metal foils that connect the rigid body 1 and the contact wire 3 at both ends of the rigid body 1, as shown in FIG. It is a connection fitting that electrically connects the The above copper contact wires 3, 3 are
A locking groove 3a formed at the upper end as shown in FIG.
is engaged with the dovetail-shaped protrusion 2 of the rigid body 1, and the claw portions 4a of a plurality of aluminum ears 4 subjected to surface treatment such as anti-corrosion coating are engaged with the other locking groove 3b, and
As shown in FIG. 5, bare ears 5 are interposed at appropriate intervals between the ears 4, and a piece of tin foil or the like is placed between the claw portion 5a and the locking groove 3b of the contact wire 3 as shown in FIG. Each ear 4 and bare ear 5 are tightened to the rigid body 1 with bolts 7 and nuts 8, respectively, with a metal foil 6 having an intermediate potential between copper and aluminum interposed therebetween, and attached to the lower end surface of the rigid body 1, As shown in FIG. 5, the contact wires 3, 3 are electrically connected to the rigid body 1 at both ends thereof by connecting fittings 9, 9. In addition, although the illustrations and explanations have been made above regarding a rigid overhead contact line consisting of two contact wires, the present invention is not limited thereto, and can also be applied to a rigid overhead contact line having one contact wire. Further, in this specification, aluminum includes aluminum and aluminum alloys, and copper includes copper alloys.

According to the present invention, an anticorrosive paint is applied to at least the lower end surface of the aluminum T-shaped rigid body 1 which is welded and connected to make it longer, and the lower end surface of the rigid body 1 is coated with a long copper contact wire. 3 along the rigid body 1 and the contact wire 3, and a plurality of aluminum ears 4 whose contact surfaces with the contact wire 3 are coated with anti-corrosion paint or alumite-treated, and an appropriate interval is placed between the ears 4. Since the rigid body 1 and the contact wire 3 are electrically connected via the bare ears 5 at appropriate intervals, the current flows between the rigid body 1 and the contact wire 3. Even if a train stops in the middle of the rigid trolley track and collects a large current, the large current will not flow only to the contact wire 3 as in the conventional case, and the contact wire There is no risk that the wire will be softened or deformed by the heat of the wire, and the connecting fittings that electrically connect the rigid body 1 and the contact wire 3 at both ends of the rigid body 1 can be made smaller. year 4
By applying anti-corrosion treatment to the entire surface or the contact surface with the copper contact wire, and by interposing a metal foil 6 having an intermediate potential of aluminum such as tin foil on the contact surface between the aluminum bare ear 5 and the copper contact wire, the copper It has excellent practical effects such as being able to effectively prevent electrolytic corrosion that occurs between dissimilar metals such as aluminum and aluminum.

[Brief explanation of the drawing]

1 and 2 are an exploded view and a side view of a conventional rigid overhead contact line. FIGS. 3 to 5 are an exploded view showing an embodiment of the present invention and a side view of the rigid electric railway line of the present invention. 1: rigid body, 3: contact wire, 4: ear, 5: bare ear, 6: metal foil.

Claims (1)

[Scope of utility model registration request] An anticorrosive paint is applied to at least the lower end surface of a T-shaped aluminum rigid body made of elongated welded joints, and a long copper contact wire is placed along the lower end surface of the rigid body to connect the rigid body and the contact wire at least. It is fixed by a plurality of aluminum ears whose contact surfaces with the contact wire are coated with anti-corrosion paint or subjected to alumite treatment, and aluminum bare ears interposed at appropriate intervals between the ears, and the above-mentioned A rigid electric train line characterized by interposing a metal foil having an intermediate potential between copper and aluminum between a copper contact wire and an aluminum bare ear.