Stop valve with sampling function

The utility model discloses a stop valve with a sampling function. Including riser, a branch pipe is welded on the side wall of the vertical pipe; a flange ring is welded at one end of each of the vertical pipe and the branch pipe; the outer wall of one side, far away from the branch pipe, of the vertical pipe is screwed with a sampling pipe; a sampling valve is arranged on the sampling pipe in abutt clamping manner; a threaded sleeve is in threaded connection with the top end of the inner wall of the vertical pipe, a threaded rod is in threaded connection with the inner wall of the threadedsleeve, a plugging block is rotatably connected to the bottom end of the threaded rod, a groove matched with the plugging block in specification is formed in the inner wall of the vertical pipe, a metal net cylinder sleeves the top end of the inner wall of the vertical pipe, and the top end of the metal net cylinder is rotatably connected with the threaded sleeve. Liquid can be filtered conveniently, pipeline blockage is a