The invention relates to a ventilated vacuum well for a
sewage tank. The ventilated vacuum well is used for collecting
sewage at a
sewage source and discharging the sewage into a downstream
sewage treatment pipe network. The ventilated vacuum well comprises a well body, a pneumatic controller, a vacuum blow-down valve, a
liquid level sensor, a sewage pipeline
system and a ventilation pipeline
system, wherein the pneumatic controller, the vacuum blow-down valve and the
liquid level sensor are arranged in the well body, and the sewage pipeline
system and the ventilation pipeline system are connected with the well body; the
liquid level sensor is used for sensing the rise and fall of
water level so as to drive the pneumatic controller to drive the vacuum blow-down valve to work, the pneumaticcontroller can be used for ventilation,
water collection and drainage, and the integral structure is compact; and a gravity sewage inlet pipeline is arranged in the sewage pipeline system. When the ventilation pipeline system is connected with the gravity sewage inlet pipeline, a lifting bent
pipe is arranged on the gravity sewage inlet pipeline to generate
water resistance, so a pressure reliefdevice is arranged. The pressure relief device is used for ventilation of the vacuum blow-down valve and the pneumatic controller, pressure relief of air in the upper part of a sewage chamber and drainage. The tolerance of
water resistance of the gravity sewage inlet pipeline is improved.