Adjustable mechanical limiting device for straight stroke executing mechanism

The utility model relates to an adjustable mechanical limiting device for a straight stroke actuating mechanism. The adjustable mechanical limiting device comprises a frame; the connecting piece is arranged in the frame; the valve rod penetrates through the frame, and the top end of the valve rod is connected with the connecting piece; the push rod penetrates through the frame, and the bottom end of the push rod is connected with the connecting piece; the at least one limiting bolt is connected with the top of the connecting piece; the limiting bolt is rotated, the height of the limiting bolt is adjusted, and when the push rod drives the connecting piece and the limiting bolt to move upwards to abut against the inner top of the frame, the valve rod is located at the upper limit position; the mechanical limiting device is simple in structure and low in machining cost; compared with a traditional mechanical limiting device, the scheme is convenient to install, and especially for a large-diameter and large-strok