PROTECTION STRUCTURE FOR UREA SUPPLY VALVE OF SELECTIVE CATALYST REDUCTION SYSTEM

摘要

The present invention relates to a protective structure for a reduction agent supply valve of an SCR device capable of preventing damage to the reduction agent supply valve caused by pressure by installing a protective valve for the reduction agent supply valve between a reduction agent supply pump and the reduction agent supply valve and interlocking the reduction agent supply valve and the protective valve for the reduction agent supply valve according to the operation of SCR chambers. The protective structure for the reduction agent supply valve of the SCR device according to the present invention includes reduction agent supply pipes connected to the SCR chambers respectively; the reduction agent supply pump supplying a reduction agent to the reduction agent supply pipes; the reduction agent supply valves formed on the reduction agent supply pipes selectively supplying the reduction agent or cutting off the reduction agent supply; and the protective valves for the reduction agent supply valves formed between the reduction agent supply valves and the reduction agent supply pump, opened when the SCR chamber is operated and the reduction agent supply valve is opened, and closed when the operation of the SCR chamber is stopped and the reduction agent supply valve is closed.