CONVERSION DEVICE, BRAKING SYSTEM, AND TRAIN

Embodiments of the present disclosure provide a conversion device, a braking system, and a train, relating to the field of trains. The conversion device comprises a valve body, a valve cover, and a first shrinkage member, the valve body is provided with a valve body air inlet path, a first valve body air outlet path, and a valve body passage; the valve cover is rotatably mounted on the valve body, the valve cover is provided with a first valve cover passage, a second valve cover passage, and a third valve cover passage; the first shrinkage member is provided at a first port of the second valve cover passage; the valve cover is configured to be rotatable relative to the valve body, so as to be switched between a first mounting position and a second mounting position. Rotatably mounting the valve cover on the valve body can reduce the used space, and is more compact and simple.