Self-operated pressure regulating valve

The utility model relates to the technical field of regulating valves, in particular to a self-operated pressure regulating valve which comprises a valve body, a guide groove and an annular frame are fixed in the valve body, the guide groove is located on one side of the annular frame, and the self-operated pressure regulating valve further comprises a pressure reducing mechanism and a control mechanism which are used for regulating flow in the valve body. Fluid pressure difference at the two ends of the valve body is fed into the control cover through the first flow guide pipe and the second flow guide pipe, the overturning plate and the worm are pushed to rotate, the rotating frame is driven to rotate through the worm and the worm gear, the six pressure reducing pieces are gathered or dispersed through the rotating seat, automatic adjustment can be conducted according to water pressure, and the pressure reducing efficiency is improved. The self-locking function of the worm gear and the worm is used for prev