Using various leaks of maintenance students and freezing valves in winter
The use of various leaks of maintenance students and the occurrence of frozen valves in winter. Sometimes the oil in the brake cylinder becomes thinner, and the compressed air containing oil enters the three-way valve and the distribution valve, causing the three-way valve and the distribution valve to malfunction. The uncompressed compressed air caused by various reasons is one of the fundamental reasons why the various air-based brakes in China cannot extend the maintenance period.
Improvement of the wind source system (1) The locomotive should be equipped with the air dryer developed by the Sifang Vehicle Research Institute to eliminate the vehicle brake failure caused by the unclean and excessive humidity of the locomotive supply air source. (2) The air compressor station of the train maintenance base should seriously solve the following problems: 1 There should be no air dryer between the air compressor station and the air supply system to ensure that the air supply source is dry air. 2 In the cooler behind the air compressor, a sampling valve should be provided at the air outlet of the air dryer to regularly check the quality of the wind source. 3 When the wind source air supply pipeline is installed and installed, it should be set to 1:300 slope, and an automatic drainer should be installed every 50m to carry out sewage discharge regularly.
Strengthening the maintenance of the brakes (1) The large filter dust nets in the intermediates of all types of brakes should be removed and removed before being repaired or repaired. (2) When the passenger car is repaired or repaired at level A2 and above, the brake supervisor shall perform the dust removal work (except for the stainless steel pipe). The internal piston and cup of the brake cylinder must be cleaned and cleaned. Use 89D brake cylinder grease that meets the standard requirements. When the brake cylinder grease becomes thinner in the high temperature season, the brake cylinder branch pipe should be cleaned in time to prevent the brake cylinder grease from flowing into the distribution valve or the three-way valve to cause malfunction. The oil and sewage in the telecentric dust collector should be removed in time. (3) Passenger trains should discharge the accumulated oil in the locomotive or train tester before connecting the brake hose to the locomotive or the train tester (including the bicycle tester and bicycle test), and then with the passenger car. Brake hose connection. Strictly prevent oil and moisture from entering the train brake pipe. After surfacing is required, machining is performed and heat treatment is performed. There are two kinds of materials for the side frame: ZG230-450 cast steel and B-grade cast steel. Manual welding is used for welding, Z4230-450 cast steel side frame is welded with E4303 welding rod, B-grade steel side frame is welded with E5016 welding rod; heat treatment method is integral heat treatment.
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