Filter mud valve

The utility model discloses a filter mud valve, which comprises the following components: a valve body, a valve cove, a middle cover, valve rod and valve plate, the valve body is equipped with intake channel and exit channel, be equipped with the filter screen in the intake channel of valve body, well lid sets up in the upper end of valve body, the valve gap sets up to be covered in, form the drive chamber between valve gap and the well lid, be provided with a flexible sheet between valve gap and the well lid, the flexible sheet will drive the chamber and divide into and drive the chamber and drive the chamber under with, in cover be equipped with down the import, be equipped with the import on the valve gap, upper end and flexible sheet and two diaphragm clamp plates of valve rod are connected, the lower extreme of valve rod is equipped with a connecting block, the upper end of valve plate is equipped with the screw hole, the connecting block passes through threaded connection in the screw hole of valve plat