Steam valve is transferred to high pressure with prevent changeing device

The utility model belongs to the technical field of the steam valve is transferred to the turbo generator set middle and high voltage, concretely relates to steam valve is transferred to high pressure with prevent changeing device. The utility model discloses a solve to a high -profile the valve connecting rod and easily throw off with the valve rod, influence the problem of the safe operation of unit and electric wire netting, and then provide a steam valve is transferred to high pressure with prevent changeing device, including connecting rod and valve rod, the last rectangle stress surface of valve rod is installed with lower rectangle stress surface department and is prevented changeing the device, prevents changeing the device and is connected fixedly with the terminal surface of connecting rod, prevent that it includes through the discoid component of bolted connection's semicircle I component II with the boss form to change the device, the upper and lower plane of the pilot hole that component I and II post assemblings of component constitute cooperates with the last rectangle stress surface of valve rod and rectangle stress surface down respectively and is connected. The utilization is prevented changeing the device and has been guaranteed the effective contact area of valve rod with the rectangle fitting surface of connecting rod, has solved connecting rod and the easy out -of -gear problem of valve rod, has further guaranteed the safe operation of unit and electric wire netting.