초록 ▼

The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The ax

The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The axially-rotated valve typically may be designed to avoid flow separation and/or cavitation at full flow under a variety of conditions. Similarly, the valve is designed, in some embodiments, to produce streamlined flow within the valve. An axially aligned outlet may also increase the flow efficiency. A typical cross section of the eccentric split venturi may be non-axisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity using the design of the present invention. Such a design can include applications for freeze resistant axially-rotated valves and may be fully-opened and fully-closed in one-half of a complete rotation. An internal wide radius elbow typically connected to a rotatable portion of the eccentric venturi may assist in directing flow with lower friction losses. A valve actuator may actuate in an axial manner yet be uniquely located outside of the axial flow path to further reduce friction losses. A seal may be used between the two portions that may include a peripheral and diametrical seal in the same plane. A seal separator may increase the useful life of the seal between the fixed and rotatable portions.

대표청구항 ▼

[ We claim:] [1.] An axially-rotated split venturi valve comprising:a. at least one rotatable sleeve;b. a fixed position sleeve fluidicly connected to said rotatable sleeve;c. an axial eccentric split venturi having a first portion, said first portion having a first flow path with a first flow path

[ We claim:] [1.] An axially-rotated split venturi valve comprising:a. at least one rotatable sleeve;b. a fixed position sleeve fluidicly connected to said rotatable sleeve;c. an axial eccentric split venturi having a first portion, said first portion having a first flow path with a first flow path periphery, a venturi periphery, and a second portion wherein said first portion is located inside said fixed sleeve and said second portion is located inside said rotatable sleeve and wherein said venturi periphery does not extend substantially beyond said first flow path periphery;d. an exit port fluidicly connected to said rotatable sleeve;e. an interface between said rotatable sleeve and said fixed sleeve;f. a first seal between said rotatable sleeve and said fixed sleeve at said interface; andg. a seal separator member adapted to separate said first seal wherein said rotatable sleeve, said fixed position sleeve, said axial eccentric split venturi, said exit port, said interface, said first seal, and said seal separator member comprise an axially-rotated split venturi valve.