FIELD: mechanical engineering.
SUBSTANCE: drum consists of at least two components, that is, bottom and shell. Each of said components is at least partly made from sheet steel. One of said components or both of said components are furnished with arched structure facing inward of drum. Arched structure is defined by spherical protrusions directed inward of drum. Edges of protrusions are made circular, or elliptical, or oval-shaped. Protrusions are arranged at intersection points of regular polygonal axis pattern forming a plurality of equilateral triangles adhering to one another. Caustic supplying through openings are provided through shell, between protrusions, at intersection point of triangle medians.
EFFECT: increased rigidity of drum components, improved draining capability and appearance of drum.
11 cl, 6 dwg
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