ES284474U - Centrifugal pump for water recirculation (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Centrifugal pump for recirculating water, particularly applicable to swimming pools, of the type comprising a centrifugal electric pump, a pre-filter and a supply chamber between them, the electric pump being provided with an electric motor whose shaft moves a multi-blade impeller which rotates inside a diffusion chamber partially closed by a diffuser, the liquid coaxially entering the impeller and expelling by centrifugal force to a driving chamber, disposed between the electric motor and the prefilter, the prefilter being arranged so as to comprise a vertical filter cup, placed inside an external glass hermetically closed by an externally threaded cap and provided with an external suction nozzle and an outlet duct connected to the axial inlet of the impeller, so that the aspirated liquid must pass through the walls of the aforementioned glass-filter before reaching the electric pump, characteristic because the pump body, which forms a single piece with the pre-filter, is connected to the enclosure of the electric motor by means of a substantially frusto-conical connection shield, the impulsion chamber and the electric pump being hermetically separated by means of a separating part of a substantially biconic configuration, provided with a central hole and arranged so that its outer edge is clamped, with the interposition of an O-ring sealing, between the corresponding contiguous edges of the cited coupling shield and the part of the pump body, while the edges from the aforementioned central hole imprison a conventional mechanical seal of the impeller. (Machine-translation by Google Translate, not legally binding)