Supporting mechanism and method for steam extraction check valve feedback device

The invention discloses a supporting mechanism and method for a steam extraction check valve feedback device. The supporting mechanism comprises a distance adjusting assembly for installing a feedbackelement above a steam pipeline. The distance adjusting assembly comprises a support, a heat resisting steel plate, a valve base and a plurality of full-thread screws. The valve base is installed on the steam pipeline. The multiple full-thread screws are welded to the valve base. All the stainless steel full-thread screws penetrate screw holes correspondingly formed in the heat resisting steel plate. The heat resisting steel plate is fixed to the high-temperature steam pipeline through upper and lower forcing nuts screwed on all the full-thread screws. The support is installed on the heat resisting steel plate. The feedback element is installed on the support. A rotation shaft of the feedback element passes through the support, the heat resisting steel plate and the valve base and is connected with a check valve s