Emergency conversion hand valve for undercarriage

Relates to an emergency switching hand valve of an undercarriage in the field of power systems, which comprises a shell, a radial channel and two axial channels are communicated with the shell, and each axial channel is divided into two symmetrical valve core holes; a conversion shaft is rotationally assembled in the radial channel, a shaft body of the conversion shaft is reduced to form an annular groove, and a cam is coaxially fixed to the reducing shaft body, corresponding to the annular groove, of the conversion shaft; a valve sleeve and a plug are inserted in the valve element hole, and a transition hole is formed in the inner end face of the plug and is correspondingly communicated with an opening in the side of the corresponding end of the shell. The middle of the inner wall of the valve sleeve shrinks inwards to form a shrinkage cavity, a valve structure and a top door structure are slidably inserted into the two ends of the valve sleeve respectively, a first spring is arranged ...