Valve wall thickness detection device

The invention discloses a device for detecting the wall thickness of a valve, and relates to the related technical field of valves. The detection mechanism comprises a mounting block, one side of a movable rod is fixedly connected with a mounting shell, a detection rod is arranged in the mounting shell, piston blocks are slidably arranged in the mounting shell on the two sides of the detection rod, and reset pieces are fixedly connected between the piston blocks and the inner wall of the mounting shell; a transmission arm is hinged between the detection rod and the piston block, the two sides of the bottom of the mounting shell are fixedly connected with material guiding pipes, the bottoms of the material guiding pipes are provided with marking nozzles, during detection, the mounting block rotates to drive the detection rod on one side of the movable block to rotate on the side wall of the valve, and when the thickness of the side wall of the valve is different from the standard thickness, the detection rod s