| 摘要 |
<p>The balance float (1) controlled valve assembly of the invention includes at least one valve means (2), a liquid receptacle (4), and at least one balance float (1) connected via a link (5) to a rotatable free end of a pivoted balance lever (31). The valve means (2) comprises a closure member having a valve shaft (25) that is slideably guided between a first end position and a second end position. The valve assembly further includes a mechanism (3) that is arranged between the balance lever (31) and the valve shaft (25) of the closure member of the valve means (2). The mechanism (3) is designed so as to having and staying in an approximately self-locked state when the valve shaft (25) of the closure member of the valve means (2) stays in its first end position. The approximately self-locked state of the mechanism (3) is substantially resistant to forces biassing the valve shaft (25) towards its second end position in the sense of closing the thoroughfare flow passage through the valve means (2), but the approximately self-locked state of the mechanism (3) is easily and rapidly released by the balance lever (31) when the torque exerted onto the balance lever (31) by the weight of the balance float (1) is reduced, and the balance lever (31) is lifted and turned in a direction opposite to the torque exerted thereon by the balance float (1).</p> |
