Unconfined flow is to pressure flow flow state conversion facility

The utility model discloses an unconfined flow is to pressure flow flow state conversion facility, including upper reaches linkage segment, diffuser, slope section, pond figure and the low reaches linkage segment that connects gradually the setting, the diffuser includes preceding diffuser and back diffuser, has the overflow passageway on the preceding diffuser side wall, being provided with diversion pier in the back diffuser, having well dividing pier in slope section and the pond figure respectively, diversion pier, well dividing pier are sharp state and arrange the connection, make to getinto back diffuser water -logging from having entered into the pressure pipe culvert after three rivers passageway flows into slope duan bingjing pond figure behind the linkage segment of income low reaches, the back slope section of slope section and the pond body anterior segment of pond figure set up the wave absorption roof beam, there is the hole of flow equalizing the dun bi's of the well dividing pier in the body a