| 摘要 |
<p>The proposed device consists of a hydraulic cylinder (1) with a piston (3) mounted co-axially on a return piping beneath a for-way mixing cock (11) through the mediation of a supporting tube with inner diameter of the return piping, being fixedly interconnected with the return piping through the mediation of an intermediate chamber (2) and being provided at its upper end with a through plug (6), further a pull rod (8, 20) with a weight (14, 17) of mass G2 interconnecting the hydraulic cylinder (1) moving piston (3) with a lever mechanism (13, 16) being rotatably mounted in the for-way mixing cock (11) axis (10, 15) and being provided with a counterweight (14a) of mass G1, whereby the angle of the lever mechanism (13, 16) angular displacement ranging from 45 to 135 degrees is defined by an adjustable working stroke of the piston (3). In a suitable modification the hydraulic cylinder (1) piston (3) passes through a return spring (5) and the pull rod (8) is co-axially provided with a locating groove (21). In a variant design the weight (17) coupled by the pull rod (20) with the lever mechanism (16) represents a vertically oriented hollow cylinder with an inlet hole in bottom base and outlet hole in upper base thereof. In the weight (17) cavity are then freely located a roller (19) and above it an equalizing spring (18). The pull rod (8, 20) is preferably coupled with the weight (14, 17) through the mediation of an adjusting screw (7).</p> |
