FIELD: mechanical engineering.
SUBSTANCE: invention relates to aqua vending machines, specifically to automatic machines for selling water by automatically controlled water supply from a water reservoir into a water filling chamber through its (water reservoir) bottom branch pipe by means of a centrifugal pump with a "wet" rotor located in the hydraulic lock of the corresponding supply pipeline. Technical problem lies in the need to increase the reliability of the said pump due to excluding the possibility of air ingress into the bottom branch pipe and the pump proper. Water reservoir 1 comprises blade silencer 4 of water vortex, which is installed inside water reservoir 1 on its bottom branch pipe 2 on the side of inlet to this branch pipe. At the same time silencer 4 contains horizontal disc 5 and four L-shaped blades 6-9, which are permanently installed on the lower side of disc 5. Blades 6-9 are connected to each other to form an L-shaped crosspiece of silencer 4, which is symmetrical relative to the axis of disc 5, so that each blade of this crosspiece is an L-shaped plate including horizontal and vertical elements. Horizontal elements 10, 12, 14 and 16 of four L-shaped blades 6-9 together form a four-blade horizontal flange of silencer 4, on which above disc 5 is located and which directly rests on bottom 3 of water reservoir 1 in the area of bottom branch pipe 2 inlet. Vertical elements 11, 13, 15 and 17 of four L-shaped blades 6-9 together form a four-bladed vertical leg of silencer 4 located in bottom branch pipe 2.
EFFECT: damping of water vortex at the inlet of the bottom branch pipe during operation of the pump, as a result of which the possibility of air passage into the bottom branch pipe of the water reservoir and especially into the said pump during its operation is excluded.
1 cl, 6 dwg
