The utility model relates to devices for preparing feed. The fodder cooking boiler contains a housing that forms a chamber for placing raw materials, in which a mixing shaft is located with the possibility of rotation along the length of the housing from the drive, mounted in bearing supports in the end covers of the housing and equipped with blades located at a distance from the surface of the mixing shaft for mixing raw materials, connected to with this shaft, the unit for supplying steam to the stirring roll for heat treatment of the mixed raw material to turn it into feed and unit for removing condensate. The stirring shaft is made hollow and from the side of the steam supply unit is connected to a tubular pivot placed in a bearing support that surrounds it. The blades located on different sides of the mixing shaft are connected in pairs by a common tubular axis passing through the wall of the mixing shaft and having through holes in the wall at the level of the axis of rotation of this shaft, at each end of each tubular axis a hollow boss is made, to which the blade and the cavity are attached which communicates with the cavity of the tubular axis for communication through the indicated through holes with the cavity of the mixing shaft. The steam supply unit is made in the form of a fixed tubular pipe inserted into the journal cavity and communicated with the mixing shaft cavity, into which one end of the tube of the condensate outlet unit from the mixing shaft is inserted, the other end of which is brought out through the journal cavity. Between the wall of the trunnion and the tubular branch pipe of the steam supply unit, there is a seal with a stuffing box packing, pressed from the outside towards the mixing shaft by a spring-loaded axle box. 4 ill.
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