JPS61295138A - Rigid electric-car line - Google Patents

Abstract

PURPOSE:To prevent the occurrence of electrolytic corrosion due to incomplete contact and the lowering of electric capacity due to a rise in electrical contact resistance as well as to make improvements in durability, by inserting a spacer, excellent in conductivity in space between an I-rail and a booster bar and clamping it with a bolt tight enough. CONSTITUTION:A groove is formed by large circular surfaces and a pair of flare inclines at both side of a web 1c of an I-rail 1. Hereat, a spacer 2, consisting of a square copper plate, whose one side has a circular surface conformable to the said circular surface of the web 1c, is brazed to a surface of the web 1c where an oxidized film is completely removed, as one body. And, as for solder, such one that does not hinder its conductivity should be chosen. A booster bar 3 of a square section is inset in the other surface of the spacer 2 and clamped tight with a bolt 4. An insulating material-make collar 5 is inserted into this bolt 4, preventing this bolt from gathering electrolytic corrosion, and the spacer 2 is set up at a proper interval so as to make the required feeder performable to the I-rail 1. In consequence, contact part between steel and copper is tightly attached to each other completely, whereby occurence of the electrolytic corrosion is hsarply reduced. In addition, electric contact resistance is made smaller but current capacity is made larger on the other way, while durability is improved yet higher.

Description

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

[Conventional technology]

Rigid overhead contact lines are widely used on lines where overhead space is restricted, such as subway lines. There is a structure in which a @-made booster bar with high conductivity is attached to the #ll rail, and the fjIIar rail is mainly provided with mechanical strength, and this rail is used to overcome insufficient conductivity with a copper booster bar. I try to secure it with a bar.

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 I-shaped rail, and the booster bar is shaped so that it can be inserted in a hexagonal shape between the two outwardly expanding surfaces. By tightening the through bolts, the corresponding inclined surfaces of the two are pressed together by a wedge action. However, it is extremely difficult to completely adhere the booster bar by tightening bolts over the entire length of the L-shaped rail.

Corrosion between dissimilar metals occurs at incomplete contact points, which not only causes a decrease in current capacity due to an increase in electrical contact resistance, but also
It was inevitable that the life span of the rigid contact line would be shortened.

[Problem that the invention seeks to solve]

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

〔Example〕

The drawings will be explained. Rail 1 is head 1. a, bottom 1
b, 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.

The other surface of the spacer 2 is provided with a groove into which a booster bar 3 having a rectangular cross section can be inserted tightly. 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 fed to the ■-shaped rail.

The stone part in FIG. 1 shows the connection point where the rail 1 and another rail 6 are butted against each other. The spacer 7 at this location is made into a rectangular shape having an appropriate length from the seam to both sides. Also, the copper joint plate 8 of equal length is provided with a groove that fits into the booster bar. Apply this to the outside of booster bar 3,
Tighten the bolts together to the I-shaped rail. The seam plate 7 complements 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 sliding contact of the pantograph can be made smooth.

〔effect〕

In the present invention, the contact portion between steel and copper is completely fixed, and the other portions are completely non-contact. As a result, the occurrence of habitual eating is significantly reduced, and stable characteristics are maintained. Since the electrical contact resistance is small and the heat dissipation area is large, the current capacity can be increased. In addition, due to improved performance and durability,
The efficiency of each component can be improved, and the work time can be shortened, resulting in a significant reduction in construction costs.

[Brief explanation of the drawing]

Figure 1 is a front view of the present invention, Figures 2.3.4 are AA,
BB and CC cross-sectional end views, and FIG. 5 is a plan view of the rail cut portion. 1.6...I-shaped rail, 2...Spacer, 3
...Booster bar, 4...Bolt, 5...
Collar, 7...Spacer, 8...Joint plate.

Claims (2)

[Claims] (1) A long steel I-shaped rail and rectangular copper spacers with one side shaped to accommodate the rail web and the other side with square grooves and integrally soldered to the rail web at predetermined intervals. , a long copper booster bar arranged parallel to the rail and inserted into a rectangular groove of a copper spacer, and a bolt passing through the above three members. (2) At the butt part of the rails, use a spacer of an appropriate length that spans both rails, place a copper joint plate of approximately the same length on the outside of the booster bar, and attach the above four members on both sides of the butt part. 2. A rigid overhead contact line according to claim 1, wherein the rigid contact line is fastened with bolts.