| 摘要 |
Sliding skirt valves for waterless urinals and method of controlling fluid flow through the sliding skirt valve are presented. The sliding skirt valve has a valve body, which includes an inlet, an outlet and a sealing surface. The sliding skirt valve also has a central shaft with an upper stop and a lower stop and a barrier interface. Between the upper and the lower stops, a conical barrier is slidingly engaged with the barrier interface. In a normal pressure state, the conical barrier lies against the lower stop of the central shaft. In a back pressure state, the conical barrier moves upwardly to lie against the upper stop of the central shaft and block the vent to upward fluid flow from the downstream of the sliding skirt valve. |
| 主权项 |
1. A device for controlling fluid flow, comprising:
a valve body comprising an inlet, an outlet, and a sealing surface; a central shaft that is positioned within the valve body comprising an upper stop that is positioned below the inlet, a lower stop that is positioned below the upper stop, and a barrier interface that lies between the upper stop and the lower stop; and a conical barrier, configured as the surface of a frustum of a cone and arranged with the small base oriented towards the inlet and comprising an aperture positioned at the small base, wherein the central shaft passes through the aperture at the barrier interface, wherein the conical barrier is slidably engaged with the central shaft at the barrier interface and is configured to move between the lower stop and the upper stop. |
