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US 2003/0196698 A1Published application
Axial flow control valve
AssigneeMetal Industries Research & Development Centre
InventorsChin-Shun Lin, Kuo-Hung Lin
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AssigneeMetal Industries Research & Development Centre
InventorsChin-Shun Lin, Kuo-Hung Lin
Estimating the term…
An axial flow control valve comprises a valve body having a flow passage containing therein a cylinder and an annular sleeve both are held in position by a positioning sleeve. The annular sleeve has a wall member formed with a multi-pores means for providing a number of V-shaped or elongate ports for reducing noise and vibration of fluid flow. A push rod is axially movably disposed within the cylinder, having one end attached with a resiliently biasing means for resiliently engaging a valve piston axially displaceable within the cylinder and the annular sleeve for controlling fluid flow. The positioning sleeve is formed with a truncated conical valve seat to associate with the valve piston for sealingly occluding fluid flow. O-rings made of resiliently metallic or ceramic material are disposed on the valve piston and/or the push rod for sealing the axially movable elements, so that the valve can be used in a high-temperature environment. The present invention provides an axial flow control valve having characteristics low pressure drop, high fluid flow, reduced noise and vibration, suitable for use in high-temperature environment, less frictional resistance between the valve piston and valve seat, minimized operational torque, simplified construction and ease of manufacturing.
An axial flow control valve, comprising:
A sealing member for use in sealing between two relatively axially movable elements, comprising:
Dependencies are inferred from the claim text.
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Backward citations are indexed for grants only.
Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion…: with…
Fluid handling: larner-Johnson type valves; i.e., telescoping internal valve in expanded flow line section
Valves
Technical subjects covered by former us classification
Term end not estimated
1. Field of the Invention
The present invention relates to an axial flow control valve, and particularly to an axial flow control valve having beneficial characteristics—low pressure drop, high fluid flow, reduced noise and vibration, suitable for use in a high-temperature environment, less frictional consumption between the valve piston and valve seat, reduced operational torque, simplified construction and ease of manufacturing.
2. Description of Related Art
FIG. 1 is an schematically cross-sectional view showing the construction of a conventional axial flow control valve;
FIGS. 2A & 2B are schematic views showing the construction and operation of a conventional valve having pressured self-lock valve seat construction;
FIG. 3 is a perspective view of a preferable embodiment of the axial flow control valve in accordance with the present invention;
Certain terminology may be employed in the following description for convenience rather than for any limiting purpose. For example, the terms “forward,” “rearward,” “right,” “left,” “upper,” and “lower” designate directions in the drawings to which reference is made, with the terms “inward,” “inner,” or “inboard” and “outward,” “outer,” or “outboard” referring, respectively, to directions toward and away from the center for the referenced element, the terms “radial” and “axial” referring, respectively, to directions or planes perpendicular and parallel to the longitudinal central axis of the referenced element, and the terms “downstream” and “upstream” referring, respectively, to directions in and opposite that of fluid flow. Terminology of similar import other than the words specifically mentioned above likewise is to be considered being used for purposes of convenience rather than in any limiting sense.
Referring to FIGS. 3, 4 and 5, an axial flow control valve in accordance with a preferable embodiment of the present invention comprises a valve body 1, a cylinder 2, a push rod 3, a valve piston 4, an annular sleeve 5, a positioning sleeve 6, a valve bonnet 7, and a valve stem 8.
As illustrated in FIGS. 4, 5, 6 and 7, the valve body 1 has a longitudinal axis L and formed therein along the fluid flowing direction an inlet flow passage 11, a valve chamber 12 and an outlet flow passage 13. A through hole 14 is vertically formed on valve body 1 and extending substantially perpendicular to the longitudinal axis L into the valve chamber 12.