JPH0515577B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the improvement of rigid overhead contact wires, and aims to prevent electrolytic corrosion between dissimilar metals constituting rigid overhead contact wires and improve electrical performance. It is.

[Conventional technology]

Rigid overhead contact lines are tracks with limited upward space.
For example, it is widely used on subway lines. There is a structure in which a highly conductive copper booster bar is attached to a steel rail. I'm trying to secure it.

This attachment structure is known in Japanese Patent Publication No. 52-7604, and is as follows. That is, a groove with a pair of outwardly expanding inclined surfaces is formed on both sides of the web of the shaped rail, and the booster bar is shaped so that it can be inserted in a hexagonal manner between the two outwardly expanding surfaces, so that the booster bar and the shaped rail can be inserted. By tightening with a through bolt, the corresponding inclined surfaces of the two are pressed together by a wedge effect. However, it is extremely difficult to completely adhere the booster bar by tightening bolts over the entire length of the shaped rail. Electrolytic corrosion occurs between dissimilar metals at points of incomplete contact, which not only reduces current capacity due to an increase in electrical contact resistance, but also inevitably shortens the life of the rigid overhead contact line.

[Problem that the invention seeks to solve]

In the present invention, a suitable spacing is provided between the shaped rail and the booster bar, a highly conductive spacer is inserted between them at an appropriate spacing, and the three are bolted together. This is because feeding electricity to the shaped rail by the booster bar requires inserting spacers at appropriate intervals or does not necessarily require attachment over the entire length of the shaped rail. By limiting the number of bolt tightening points, construction can be carried out reliably and quickly.

〔Example〕

The drawings will be explained. The rail 1 has a head 1a,
It consists of a bottom part 1b and a web 1c. Both sides of the web form large arcuate surfaces, and a groove is formed by a pair of outwardly expanding inclined surfaces. The spacer 2 is a rectangular copper plate, one side of which has an arcuate surface that matches the arcuate surface of the web, and is integrated with the web surface from which the oxide film has been completely removed by soldering. Select a wax that does not interfere with conductivity. Spacer 2
A groove is provided on the other surface of the bar into which a booster bar 3 having a rectangular cross section can be tightly inserted. After fitting the booster bar into this groove, tighten the booster bar, spacer, and rail together with bolts 4. A collar 5 made of insulating material is inserted into the bolt 4 to prevent electrolytic corrosion of the bolt. The spacers 2 are provided at appropriate intervals so that unnecessary electricity can be supplied to the shaped rail.

The right side of FIG. 1 shows the connection point where the rail 1 is connected to another rail 6. The spacer 7 at this location is made into a rectangular shape having an appropriate length from the seam to both sides. In addition, the copper joint plate 8, which is approximately the same length as this, has
There is a groove that fits into the booster bar. Apply this to the outside of the booster bar 3 and bolt it together to the shape rail. The seam plate 8 supplements the electrical conductivity at the rail cut. If the rail cut shapes are joined so that the rail heads 1a have an acute angle as shown in FIG. 5, the pantograph can be welded smoothly.

〔effect〕

To those having the same purpose as the present invention,
36667 is known. A copper booster bar is attached to the rail web via an insulating spacer or something similar, and the rail and booster bar are separately welded at appropriate locations to form electrical connections. In contrast, the present invention is characterized in that it does not require such a special electrical connection and can prevent electrolytic corrosion, thereby significantly simplifying the work.

[Brief explanation of the drawing]

FIG. 1 is a front view of the present invention, FIGS. 2, 3, and 4 are end views of cross sections AA, BB, and CC, respectively, and FIG. 5 is a plan view of a rail cut portion. 1, 6... rail, 2... spacer, 3...
...Booster bar, 4...Bolt, 5...Kara, 7
...Spacer, 8...Joint plate.

Claims (1)

[Scope of Claims] 1. A long steel shaped rail, and a rectangular shape having one side shaped to accommodate the rail web and the other side having square grooves that are integrally soldered to the rail web at predetermined intervals. It consists of a copper spacer, a long copper booster bar placed parallel to the rail and inserted into the rectangular groove of the copper spacer, and a bolt inserted into a collar made of insulating material and passing through the collar and the three members mentioned above. Rigid trolley line. 2. At the butt part of the rails, use a spacer of an appropriate length that spans both rails, place a steel joint plate of approximately the same length on the outside of the booster bar, and place the above four members on both sides of the butt part. A rigid overhead contact line according to claim 1, which is fastened with bolts.