Control system for rail car sand spraying and sand cleaning, and control method thereof

Abstract

The invention discloses a control system for rail car sand spraying and sand cleaning, and a control method thereof. The system comprises a sand spraying control loop, a sand cleaning control loop, adrying control loop and a relay control loop, wherein the relay control loop comprises a first relay and a second relay, and the first relay and the second relay are connected in parallel; one end ofthe first relay and one end of the second relay are both connected with the access end of the sand spraying control loop, and the first relay is a time delay relay; the first normally open contact ofthe first relay and the first normally-closed contact of the second relay are arranged in series in the sand cleaning control loop; the second normally open contact of the first relay and the third normally-closed contact of the second relay are arranged in series in the drying control loop. According to the control system, when a sand spraying program needs to be started, the access end of the sand spraying control loop is connected with a power supply, and at the time, the sand cleaning control loop and the drying control loop are under a locking state; after sand spraying is finished, onlythe access end of the sand spraying control loop and the power supply need to be disconnected to automatically execute a sand cleaning program and a drying program.

Description

technical field [0001] The invention relates to the field of rail vehicle sand spreading, in particular to a rail vehicle sand spreading and cleaning control system and a control method thereof. Background technique [0002] At present, on rail transit vehicles, such as locomotives, bullet trains, subways, etc., the function of the sanding unit is controlled by electricity and executed by air, so as to spray the sand in the sand box to the contact surface of the wheel and rail in good time to increase adhesion and prevent the wheels from slipping. Features. The residual sand in the sand pipe will not be cleaned after sand spreading. In this way, there is a hidden danger, that is, if the sand pipe is laid with a horizontal section, fine sand will remain there after the sand spreading is over. After a long time, the fine sand will accumulate and agglomerate, thereby blocking the sand pipe. Once agglomerated Yarn blocks hinder the sand spreading function, which will bring saf...

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