Device for spraying liquid mixtures

Abstract

A device for spraying liquid mixtures, in particular for discharging crop protection agents in agriculture, is described. The device is provided with at least one spray nozzle and a mixing device attached in front thereof having a metering arrangement for the liquids to be mixed and a cylindrical mixing chamber with tangential liquid supply. The metering device, which can in particular be provided for discontinuous and pulse-effected admixing of the crop protection agent, is arranged in front of the mixing chamber. The liquid supply to the mixing chamber (5, 16) is provided with one or more outlet apertures extending over the entire axial length (I) of the mixing chamber (5, 16) and of which the free cross-section is determined by a control element (9, 17) opening or closing depending on the liquid pressure. This control element can be a spring-loaded control flap (9) of which the free end is located in front of an outflow slot (8) that also extends over the entire length (I) of the mixing chamber. In a variant, this control element can also be a curved leaf spring (17) located in the mixing chamber (16), the free end (17a) of which spring extends over the outlet apertures. This embodiment ensures automatic adjustment of the inlet cross-section into the mixing chamber for the respective flow speed required to keep the liquid in contact with the wall of the mixing chamber and to achieve in this way a good and homogeneous mixing of the crop protection agent with the water used as the carrier liquid.

Dependencies are inferred from the claim text.