The application provides a long-pressure
penstock emptying
system without a
gate valve at the end of the
penstock and a working method thereof, which comprises a water inlet, a long-pressure
penstock, a pressure pipeline and a
plant in sequence, a pressure regulating chamber is arranged at the joint of the long-pressure penstock and the pressure pipeline, a construction
adit is arranged at the end of the long-pressure penstock, the construction
adit is arranged on the upstream side of the pressure regulating chamber, a maintenance gate is arranged at the end of the long-pressure penstock close to the construction
adit, a water collecting pit is arranged at the bottom of the long-pressure penstock close to the construction adit, a drain
pipe is communicated with the bottom of the water collecting pit, one end of the drain
pipe is connected to the outside through the construction adit, a working valve is arranged at the water outlet end of the drain
pipe, the water collecting pit is arranged to actively collect seepage water, the construction adit is used as a seepage water leading channel of the long-pressure penstock, and the seepage water in the long-pressure penstock can be effectively drained; the temporary water blocking sandbags can be quickly arranged and removed, and the seepage water can be effectively prevented from flowing into the pressure pipeline downstream.