Multi-jet watering nozzle with counter-rotating elements for underground pop-up sprinkler

摘要

A watering nozzle (16) for underground pop-up sprinkler (1) comprises a bottom part (17) and a top part (37) comprising a distribution cylinder (40). The bottom part (17) is provided with an annular opening (100) that receives the flow of water coming from the base of the sprinkler (1) and generates a jet in the form of a spray having pre-established angular extension that flows into a distribution cylinder (40) provided with radial slots (41) arranged as an arc of circumference that proceed from its bottom to its side wall so as to subdivide the single spray jet into single jets. The distribution cylinder (40) has on top a fan wheel (70) having a diameter greater than the cylinder and provided with external fins (71) that extend downward. The distribution cylinder (40) rotates under the action of the single jet of water on the walls of said radial slots and by a set of gears (200) the fan wheel (70) is made rotate in opposite sense as compared with the cylinder (40) in such a way that the various jets of water coming out of the slots (41) are deviated in radial direction.