| 摘要 |
The present invention is a pinch valve for connection between an upstream pipeline and a downstream pipeline. The pinch valve includes a fixed conical reducer having an inlet end, an outlet end and an inside surface with an inside diameter which gradually reduces from the inlet end to the outlet end, resulting in a substantially conical-shaped inside surface. The inlet end of the fixed conical reducer attached to the upstream pipeline. The pinch valve also includes a flexible full port sleeve having an inlet end and an outlet end, the inlet end of the flexible fill port sleeve attached to the outlet end of the fixed conical reducer and the outlet end of the full port sleeve attached to the downstream pipeline. The pinch valve further includes a pinching mechanism positioned adjacent the flexible full port sleeve and configured to constrict the flexible full port sleeve.
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