| 摘要 |
<p>Valve disposition that allows connection to a principal source (1) of pressure with pressure consumption (10, 11), with a vie valve (5) with a valve drawer (15) guided in a valve container (14), coupled with at least one command piston (24) stressed through a control pressure, can be moved to reach a neutral position, where it intercepts the connection between the principal source of power (1) and the pressure consumption (10,11), and/or at least one functioning position, in which it frees the connection between the main source of pressure(1) and the pressure consumption (10, 11), where the control piston (24) is guided in a control cylinder (23) connectable to a source through control pressure for at least one container duct (9), expected on the valve container (14), through a control fluid, in which control disposition the duct of the container (9) leads to the internal wall, facing the valve drawer (15) of the container of the valves (14) and it is connectable to a control cylinder (23) through at least one duct (16) of the container expected on the valve container and leading to the external wall of the latter, facing the container of the valve (14), where the duct of the container (9) is situated in a fluid -dynamic connection with the duct of the container (16), through a part of the motion path of the control piston (24), and where on the internal wall of the valve container (14), as well as on the external wall of the valve drawer (15) are expected control edges (26, 27, 28, 29) associated to each other, and that intercept the connection of the current of the duct (9) of the container and of the duct of the drawer (16). When the control piston (24) has nearly reached its moving position associated to the functioning position, associated with the neutral position o the valvular container (15), (Figure 1).</p> |
