Urban water transmission and distribution pipe vapor-mixing super-cavitation explosion-proof and water leakage reduction device

The invention relates to a novel urban water transmission and distribution pipe vapor-mixing super-cavitation explosion-proof and water leakage reduction device. The novel urban water transmission and distribution pipe vapor-mixing super-cavitation explosion-proof and water leakage reduction device is characterized in that water vapor in a water outlet pipe behind a water valve is introduced into an outlet of the water valve through a bypass pipe, so that vapor mixing is carried out on water which flows through the water valve and contains cavitation groups, the local pressure of a vapor mixing area is improved, the cavitation number is effectively reduced, the pressure during cavitation collapse is reduced, a super-cavitation state is formed, the micro torrent and cutoff water hammer bridging phenomenon is greatly reduced, and therefore the pipe explosion and water leakage of urban water transmission and distribution pipes are reduced. The water vapor in the bypass pipe converges with the water in the water