Secondary nozzle device of sprinkling irrigation nozzle

Abstract

The invention discloses a secondary nozzle device of a sprinkling irrigation nozzle. The secondary nozzle device of the sprinkling irrigation nozzle comprises a secondary nozzle shell, an adjusting spring, a secondary nozzle inner core, a limiting sleeve and a sealing ring. The secondary nozzle inner core coats the inner side of the secondary nozzle shell; the secondary nozzle inner core and the secondary nozzle shell are concentrically mounted; the adjusting spring is arranged between the secondary nozzle inner core and the secondary nozzle shell; the limiting sleeve is connected to the inner side of the secondary nozzle shell through a thread to realize the limitation of the secondary nozzle inner core; and the sealing ring is arranged in a sealing groove of the secondary nozzle inner core to realize the sealing between a second conical section and a fourth conical section in bonding. A second outlet hole is formed in the secondary nozzle shell; a first outlet hole is formed in the secondary nozzle inner core; when the nozzle works under low pressure, the first outlet hole and the second outlet hole synchronously perform a spraying operation; and when the pressure of the nozzle is increased to a certain value, a first secondary nozzle runner only performs the spraying operation.

Description

technical field [0001] The invention relates to the field of fluid machinery, in particular to an auxiliary nozzle device of a sprinkler head. Background technique [0002] The sprinkler head is one of the key equipment for sprinkler irrigation, and reducing the rated working pressure of the sprinkler head is an important way to save energy and reduce consumption in the sprinkler irrigation system. However, when the working pressure of the sprinkler head is reduced, the uniformity of sprinkler irrigation will usually be reduced. Therefore, improving the low-pressure hydraulic performance of the sprinkler head has always been one of the difficulties in the design of the sprinkler head. Adopting the main and auxiliary nozzle structure is an important measure to improve the hydraulic performance of the nozzle. Chinese Patent No. CN2401024Y discloses "a rotating nozzle", and a three-nozzle rocker nozzle is designed. In addition to the second nozzle, the first The tube wall of t...

AI Technical Summary

Problems solved by technology

[0003] Although the existing auxiliary nozzles have different structures, they have one thing in common, that is, the outlet form of the auxiliary nozzle is fixed. With the decrease of the working pressure of the nozzle, the water flow sprayed by the nozzle with the same outlet form will inevitably reduce its dissipation effect. It often leads to a decline in the uniformity of the water distribution of the sprinkler head, so the existing sub-nozzle structure has limited effect on improving the water distribution of the sprinkler head under low pressure conditions, and has no obvious effect on reducing the working pressure of the sprinkler head.

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