Inspection and analysis of limiters

The role of the limiter >>
①Restrict the crawling of the pointed rail;
② Release part of the temperature force transmitted by the coupling rail due to a certain amount of displacement.
The state analysis of I&E combined part, first of all, check the limiter, frame, heel spacing and heel support distance, heart rail rebound, top iron, sliding bed plate, guiding pin, guiding block, anti-jumping device and so on.
By checking and recording the status change of the turnout, and then taking reasonable adjustments, it is the best practice to effectively reduce the inertia failure of the turnout and effectively improve the quality of the turnout equipment.

▶ Limiter check and analysis

1,Limiter check:

1.1, turnout limiters top dead, the rear of the pointed rail by the role of the limit iron, due to the role of the point of unreasonable, resulting in the inversion of the pointed rail, outward or arching, the conversion of asynchronous resistance to sudden changes.

1.2, limiters removed after crawling increase, easy to cause the conversion of rod wear card, don't strength. Various types of limiters gap does not meet the standard dead, pointed rail heel end spacing iron bolts loose displacement, pivot point role is bad. Can be adjusted by adjusting the limiters fixed angle to alleviate or eliminate the phenomenon of limiters against the dead, adjusting and tightening the spacing iron, the role of good, heel spacing in line with the standard.
 

2, measurement method:

At the edge of the gap, use a straightedge to lean vertically against the bevelled surface of the limiter cam, and measure the gap between the cam and both sides of the inside of the gap.
Limiters are not centred (A, B block gap between more than 7 ± 1.5mm range) will cause the guide curve gauge changes (biased towards the tip of the direction of the gauge becomes smaller, and vice versa the gauge becomes larger), the tip of the rail is not square to produce crawling, the locking hooks are not in the middle of the axle pins, indicating that the rod grinding locking frame to affect the conversion, or indicating that the rod sealing chain box guide groove bolts, the occurrence of the track circuit of the red light band.

 

Product link: http://www.tiegongcn.com/railway-tools/digital-rolling-rail-gauge.html

 

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Alina Shen 

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