By Joanie Zhao
Posted 2 months ago

Do you know the reasons for side grinding, falling pieces and breakage of point rails and the improvement methods?

Rail Infrastructure

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Do you know the reasons for side grinding, falling pieces and breakage of point rails and the improvement methods?
The reason:
â‘ The switch position is incorrectly laid;
â‘¡ The basic rail moves laterally and three seams appear (there are seams between the basic rail and the sliding table)
There is a gap between the lower jaw of the basic rail head and the upper part of the rail bottom and the contact part with the rail support, and there is a gap between the tail of the rail support and the shoulder of the slide plate);
â‘¢The basic rail functions to fatten the edge;
â‘£The bending size of the basic rail is incorrect;
⑤The hanging board and sleepers in the switch part failed;
â‘¥The top iron of the pointed rail is out of joint;
⑦The sliding bed plate boss is worn;
⑧The large connector is poorly connected.
Possible remedial measures:
â‘  Use a high-precision theodolite to measure the direction of the entire fork area and the 100 m before and after the line, and adjust the entire fork area and the 100 m before and after the line based on the measurement results.
â‘¡ Replace failed sleepers in a timely manner, especially the switch part, tip rail tip and tip rail heel end sleepers, and strengthen the level of the above parts and the adjustment of the hanging board to keep them at the same level.
â‘¢Tighte the rail support bolts, anchor bolts and threaded spikes.
â‘£ Eliminate three seams and make the wooden sleepers, sliding bed boards, rail supports and basic rails tightly connected.
⑤ Install reinforcing pads on the outside of the two basic rails.
â‘¥At the tip of the point rail, in the middle of the point rail, and after the point rail of the two straight basic rails, install
Install one insulated gauge rod with lengths of 1800 mm, 1400 mm and 1200 mm to stabilize the switch part frame.
⑦ Timely grind the active side fat edge of the basic rail and the non-active side fat edge of the tip rail.
⑧The separation of the top iron from the seam is closely related to the crawling of the tip rail. When the top iron is not in close contact, it will cause uneven stress on the tip rail, false gauge and hard bending of the tip rail. While correcting the crawling of the tip rail, pad the top iron so that the static gap between it and the basic rail is no more than 2 mm.
⑨ The wear of the sliding bed plate will cause the switch to be blocked, the switch to have no indication, the hanging plate and the tip rail to be loose, and the operation to be difficult. A large number of sliding bed plates are worn at the duplex switch site, and the entire sliding bed plate should be replaced during maintenance and repair operations. The 1#, 2#, 3#, and 4# sliding bed plates in front of the switch rail must be cut into oblique sliding bed plates on site to meet the electrical insulation requirements before they can be installed.

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