| 摘要 |
<p>The invention is a liquid fertiliser dispensing nozzle that contains a flow control device to adjust the rate of flow of a pressurised liquid fertiliser and a mering deice for such a nozzle. The nozzle comprises a main body (10) defining a chamber (15) with spray holes (16), and attachable to a supply orifice of a sprayer. A metering plug (11) has a part extending into the chamber, and defines an inlet (24) for receiving liquid under pressure from the supply orifice. The plug also has an aperture (26) through which liquid fertiliser may pass into the chamber and a flow path from the inlet to the aperture. A resilient sheath (28) is mounted around the plug and closes each aperture. The sheath (28) is expandable in response to increases in the pressure of the liquid fertiliser to allow the liquid fertiliser to flow out of the aperture (26) into the chamber (15) at a rate directly proportional to the pressure of the liquid fertiliser introduced to the inlet, such that an increase in liquid fertiliser pressure increases the size of the outlet resulting in an increase in flow rate.</p> |
