1. Inlet pipe for ventilation of livestock buildings for farm animals which contains: - an opening (20) of the outer air inlet,! - exhaust opening (62)! - the air channel extending along the longitudinal axis (11), the inflow pipe and connecting the external air inlet port to the exhaust port having a first portion (10) of the air channel, extending in the outside air flow direction from the outside air inlet opening to the inlet (51) of air animal houses, and a second portion (60) of the air channel, extending in the direction of flow from the inlet (51) to the room air livestock suction opening (62)! - a device (70) for feeding air located within the air passage of the second portion and designed to feed air from inlet openings livestock indoor air and the first air channel portion toward the exhaust hole! characterized in that it comprises a first throttling device drosselnm valve (30) is movable, in particular pivotable between a first position in which it closes the first air channel portion and a second position in which it opens the first air channel portion and a second throttling device disposed in the first portion of the air channel in flow direction behind pervm throttling device and comprising at least one air guide element (4 1 a-d), set in a first position for actuating flowing through the second throttling device in the air spiral movement vokru1. Приточная труба для приточной вентиляции животноводческих помещений для сельскохозяйственных животных, содержащая:- отверстие (20) впуска наружного воздуха,- вытяжное отверстие (62),- воздушный канал, проходящий вдоль продольной оси (11) приточной трубы и соединяющий отверстие впуска наружного воздуха с вытяжным отверстием, имеющий первый участок (10) воздушного канала, продолжающийся в направлении потока наружного воздуха от отверстия впуска наружного воздуха к впускному отверстию (51) воздуха животноводческого помещения и второй участок (60) воздушного канала, продолжающийся в направлении потока от впускн
