| 摘要 |
<p>A nozzle pipe comprising a liquid pipe (1), an air pipe (2), and a casing (3). The air pipe (1) allows air under atmospheric pressure to be sucked into the liquid which is conveyed in the liquid pipe (2). The form and placing of the air pipe in the clear of the liquid pipe result in that a partial vacuum is established round the aperture in the air pipe in the liquid pipe thereby causing air to be sucked into the liquid. This results in an increase in pressure in the liquid which thus leaves the orifice (7) of the liquid pipe with a greater velocity than if air has not been supplied to the liquid. To avoid that foreign bodies block the outer aperture of the air pipe the nozzle pipe furthermore comprises a casing (3) which covers the aperture of the air pipe but which still allows air to be admitted to the air pipe.</p> |
