| 摘要 |
<p>The valve finds application in low-pressure irrigation systems for large- or small-size areas, irrigated in furrows. Its operation is universal and facilitated. The valve includes an upper (1) and lower (2) housing, between which the ends of membrane (3) are fitted, the above-the-membrane space (4) which is enclosed in the housing (1). To housing (2), an inlet (5) and outlet (6) tube are provided. Membrane (3) has a rigid centre (7), directly connected by stem (8) to a lower disc valve (9), fitted in the space between the tubes (5 and 6), each of which is connected by a respective tubular connection (10, 11) to space (4), connected on its turn, to a means of control. Centre (7) of membrane (3) is connected on its outward side with a lower disc flap (9), directly by means of stem (8), reinforced by side guides (16) to the external side of the housing (2), and the means of control is in the form of an electrically controlled valve (13). The latter includes a hydraulic sensor (13.1) and eccentric stepping regulator (13.2), interconnected by a balancing element (13) ), wherein valve (13), by means of sensor (13.1) is mounted to the tubular connection (11) of the above-the-membrane space (4) to tube (6). 5 claims, 2 figures</p> |
