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Maintenance of railway bifurcation
- Oct 12, 2017 -

1)The maintenance quality of railway branches is not high

The requirements of the maintenance standard for the sharp rail and the door-bed are not accelerated, and there are the problems such as the distortion of the rail, the displacement, the lifting plate, the steel pillow, etc., which causes the transformation resistance of the bifurcation. 32 faults occurred, accounting for 12.1% of the total number of failures. In the field, the signal workers are not in contact with the workers, and carry out work and electricity joint control.

(2)The traffic is bad for railway switches

Electric locomotive Sasha more at startup, and traffic department to speed rail sliding plate cleaning, oil is not timely, tongue rail and sliding friction between bed plate increases, and the bell man take passive way, unilateral increase the overflow pressure (increase power) to overcome the influence of rail transition resistance (non-standard), cause hydraulic pressure oil leakage and blowout. The failure occurred 35 pieces, accounting for 13.1% of the total number of failures.

(3)Speed up railway crossing lock iron, lock hook and other abrasion 

Early due to the acceleration of railway rail on the scene of the adjustment is not enough, especially the dense paste strength is not enough, each part is loose, coupled with a fast speed segments by train and cause equipment in the process of using locking hook inner sleeve abrasion, such as connection iron pin hole is bigger, the equipment standard phenomenon is serious, the switch action occurs when resistance card, don't understand lock, card gap, locking hook climbed above the guide groove, etc. There were 46 failures, accounting for 17.3% of the total number of failures.

(4)The design of railway bifurcation is not perfect

1. Clamps to the upper limit slot form the card resistance. The problem as part of the Taiyuan factory equipment design flaws, speed switch in the displacement of point rail, rail founder, switch A and B different A switch when A move on the tongue rail wing, causing the lock hook up limit groove formed jam, once the failure, recovery difficulties, failure delay long and great influence. 10 pieces of failure have occurred, accounting for 3.8% of the total number of failures.

2. Low resistance power. In the circuit design of speed-up railway switch, the outdoor resistance model of the circuit is 300 euro and 30 watts, which is very vulnerable in practical application because of the low design power of the resistor. Six faults occurred, accounting for 2.3% of the total number of failures.

3. Indicates that the rod connection screw is loose. Speed railway switch inside and outside said rod fixed screw connection iron using iron locking, and in the process of maintenance, as long as the fixed screw loose change or a function of locking of the plate is little, and the screw thread is shorter, appear easily slide wire loose, gap caused by card. 20 failures occurred, accounting for 7.5% of the total number of failures.