Prevent malleation discharge valve and negative pressure jar drainage system

The utility model provides a prevent malleation discharge valve and negative pressure jar drainage system, belongs to the drainage equipment field, includes: case, valve body, spring, case and spring arrangement are in the valve body, and the spring is fixed with the valve body, and the case can remove in the valve body, its characterized in that: being equipped with between case and the valve body and having the open -ended valve block, the valve block is fixed with the case to can remove in the valve body. Negative pressure jar drainage system includes: malleation discharge valve is prevented to the negative pressure jar body, pump drainage device, moisturizing device, absorb water pipeline and foretell one kind, prevents that malleation discharge valve and moisturizing device set up at negative pressure jar body top, and pipeline and the pump drainage device of absorbing water sets up in negative pressure jar body bottom, and the pump drainage device stops, moisturizing device beginning moisturizing, and w