Valve drive mechanism, bypass mechanism of burner and rotating machine

The utility model provides a valve drive mechanism, a bypass mechanism of a burner and a rotating machine. The valve drive mechanism comprises a drive ring, a rod component connected with the drive ring, and a connecting rod connected with the rod component. The drive ring is connected with the rod component through a pin, and the rod component is connected with the connecting rod through a pin. Each pin is provided with a ball socket connector. The ball socket connectors are installed in through holes in the two ends of the rod component. The valve drive mechanism is characterized in that an extending part is arranged on the part, outside each ball socket connector, of the corresponding pin and provided with a retaining ring. Thus, even when the rod component is abraded and falls off, the rod end of the rod component can be prevented from falling down from the pins through the retaining rings, and then the rotating machine can be prevented from shutting down.