Control system for controlling opening and closing of bottom doors of entire coal hopper cars with model 120 valve

Abstract

The invention belongs to the field of pneumatic control systems of railway wagons. In order to realize the function of opening and closing of bottom doors during an unloading process of entire freight cars, the invention provides a control system for controlling the opening and closing of the bottom doors of entire coal hopper cars with a model 120 valve. The control system comprises a train main pipe connected with a locomotive air compressor, wherein the train main pipe is equipped with angle cocks for controlling on-off connection with each car; a plurality of bottom door opening and closing control units are connected with the external part of the train main pipe; each bottom door opening and closing control unit correspondingly controls the opening and closing of the bottom door of each car; the bottom door opening and closing control units have the function of controlling the opening and closing of the bottom doors and the function of self-locking with pressure holding when the bottom doors are closed; and input signals of the bottom door opening and closing control units are air pressure variations provided by the train main pipe. The control system utilizes an inflating and relieving position, a common retarder position and a pressure holding position of the model 120 control valve to control the operation of a bidirectional air cylinder, thereby completing the opening and closing control of the bottom doors of the entire coal hopper cars.

Description

technical field [0001] The invention belongs to the field of pneumatic control systems for railway freight cars, and in particular relates to a control system that uses 120 valves to control the opening and closing of the bottom doors of a whole group of coal hopper cars. Background technique [0002] The existing coal hopper car unloading methods mainly include single wind, manual unloading or ground touch unloading. Among them, the pneumatic unloading method cannot realize the simultaneous unloading of multiple connected vehicles because the wind source pressure comes from the brake supervisor, and there is no signal transmission for connecting multiple vehicles. The touch-type unloading structure mainly relies on the contact between the ground mechanism and the upper transmission handle of the vehicle, and the bottom door can only be opened under the action of the moving force of the vehicle, so it cannot realize the requirement of unloading the entire column at the same ...

AI Technical Summary

Problems solved by technology

Among them, the pneumatic unloading method does not realize the simultaneous unloading of multiple connected vehicles because the wind source pressure comes from the main brake, and there is no signal transmission for connecting multiple vehicles.

The touch-type unloading structure mainly relies on the contact between the ground mechanism and the upper transmission handle of the vehicle, and the bottom door can only be opened under the action of the vehicle's moving force, so it cannot realize the requirement of unloading the entire column at the same time

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