Automatic pipe network drainage system and device for gas extraction of coal mine roof drainage roadway

The invention discloses an automatic pipe network drainage system and device for gas extraction of a coal mine top extraction roadway, belongs to the technical field of gas extraction separation, and aims to solve the problem that solid particles and water in a mixture are thrown out due to the action of centrifugal force when the gas-water mixture enters the device and is blocked by a flow guide part to form high-speed rotation. The gas forms a vortex, rises along the central axis of the flow guide piece and is discharged through a gas outlet of the device; the thrown-out solid particles float on the water surface in the device and are uniformly collected; after the gas-water mixture encounters the conical barrel, the gas-water mixture rotates along with the turn-back plate, and under the action of centrifugal force, the gas is turned back, pressed into the conical barrel and discharged from the gas outlet pipe; water and impurities are gathered on the turn-back plate to form water drops, and the water drops