Valve seat for plug valve, valve assembly and valve seat assembly method
阅读说明:本技术 用于旋塞阀的阀座、阀组件和阀座组装方法 (Valve seat for plug valve, valve assembly and valve seat assembly method ) 是由 瑞恩·韦柏 杰弗里·罗比森 布拉德·艾伦 于 2019-07-08 设计创作,主要内容包括:本文中提供了用于旋塞阀的阀座、阀组件和阀座组装方法。该阀座可以包括:陶瓷阀座插入件,该陶瓷阀座插入件定位在金属阀座壳体内并包括凹部,该凹部与金属阀座壳体的保持唇部相对应;以及柔性套管,该柔性套管围绕陶瓷阀座插入件的外表面的至少一部分同轴地定位。(Provided herein are valve seats for plug valves, valve assemblies, and valve seat assembly methods. The valve seat may include: a ceramic seat insert positioned within the metal seat shell and including a recess corresponding to the retaining lip of the metal seat shell; and a flexible sleeve coaxially positioned around at least a portion of the outer surface of the ceramic valve seat insert.)
1. A valve seat, comprising:
a ceramic seat insert positioned within a metal seat shell and including a recess corresponding to a retaining lip of the metal seat shell; and
a sleeve coaxially positioned about at least a portion of an outer surface of the ceramic valve seat insert.
2. The valve seat of claim 1, wherein the sleeve comprises a pliable polymeric material.
3. The valve seat of claim 2, wherein the sleeve comprises polytetrafluoroethylene.
4. The valve seat of claim 3, wherein the metal valve seat housing comprises one of a nickel-chromium alloy, a titanium alloy, and a zirconium alloy.
5. The valve seat of claim 4, wherein the ceramic valve seat insert comprises a valve seat surface.
6. A valve seat as claimed in claim 5, wherein the valve seat surface has a shape corresponding to the shape of a portion of the plug head.
7. A valve seat as defined in claim 6, wherein the valve seat surface includes a rounded end profile.
8. The valve seat of claim 1, wherein the ceramic valve seat insert and flexible sleeve are press fit within the metal valve seat housing.
9. A valve assembly, comprising:
a plug head assembly comprising a plug head and a translation shaft;
a valve seat configured to receive the plug, wherein the plug is engaged with a ceramic valve seat insert,
wherein the ceramic valve seat insert is positioned within the valve seat and includes a recess corresponding to the retaining lip of the valve seat, and
wherein the valve seat further comprises a sleeve coaxially positioned around at least a portion of an outer surface of the ceramic valve seat insert.
10. The valve assembly of claim 9, wherein the sleeve comprises a pliable polymeric material.
11. The valve assembly of claim 10, wherein the sleeve comprises polytetrafluoroethylene.
12. The valve assembly of claim 9, wherein the ceramic valve seat insert includes a valve seat surface.
13. The valve assembly of claim 12, wherein the valve seat surface comprises a rounded end profile configured to receive a portion of the plug head.
14. The valve assembly of claim 9, wherein the metal valve seat housing comprises one of a nickel-chromium alloy, a titanium alloy, and a zirconium alloy.
15. The valve assembly of claim 14, wherein the plug comprises a ceramic material.
16. A method for assembling a valve seat, the method comprising:
inserting a ceramic valve seat insert into a central bore of a blank of material;
reducing the diameter of a portion of the blank of material surrounding the ceramic valve seat insert to form a sleeve;
inserting the ceramic valve seat insert and the sleeve into a valve seat housing; and
reducing the length of the flexible blank of material to form a sleeve having an end profile.
17. The method of claim 16, wherein the ceramic valve seat insert comprises a recess at a distal end.
18. The method of claim 16, wherein the blank of material comprises polytetrafluoroethylene.
19. The method of claim 16, wherein the ceramic valve seat insert comprises a valve seat surface having a rounded end profile configured to receive a portion of a plug.
20. The method of claim 19, wherein the end profile of the sleeve is flush with a portion of the valve seat surface of the ceramic valve seat insert.
Background
In various industrial processes, such as metal refining, solids and liquids can be transferred from one vessel to another at elevated temperatures and pressures. It may be desirable to have flow control between the two vessels so that flow may be prevented from time to time.
Disclosure of Invention
In various embodiments, there is provided a valve seat comprising: a ceramic seat insert positioned within the metal seat shell and including a recess corresponding to the retaining lip of the seat shell; and a flexible sleeve coaxially positioned about at least a portion of the outer surface of the valve seat insert. The flexible sleeve may comprise a pliable polymeric material, such as polytetrafluoroethylene. The valve seat housing may include a nickel-chromium alloy, a titanium alloy, or a zirconium alloy, and may also include a valve seat surface.
The valve seat surface may have a shape corresponding to and capable of receiving a portion of the plug, such as a rounded end profile. The ceramic valve seat insert and the flexible sleeve may be press fit within the metal valve seat housing.
In various embodiments, there is provided a valve assembly comprising: a plug head assembly comprising a plug head and a translation shaft; a valve seat configured to receive a plug, wherein the plug is engaged with a ceramic valve seat insert, wherein the ceramic valve seat insert is positioned within the valve seat and includes a recess corresponding to the retaining lip of the valve seat, and wherein the valve seat further includes a flexible sleeve coaxially positioned about at least a portion of an outer surface of the valve seat insert. The flexible sleeve may comprise a pliable polymeric material, such as polytetrafluoroethylene. The valve insert may include a valve seat surface, which may have a rounded end profile configured to receive a portion of the plug head. The valve seat may comprise a nickel-chromium alloy, a titanium alloy, or a zirconium alloy, and the plug may comprise a ceramic material.
In various embodiments, a method for assembling a valve seat assembly is provided, the method comprising: inserting a ceramic valve seat insert into a central bore of a blank of flexible material; reducing the diameter of a portion of the flexible material blank surrounding the valve seat insert to form a flexible sleeve; inserting a valve seat insert and a flexible sleeve into a valve seat housing; and reducing the length of the blank of flexible material to form a flexible sleeve having an end profile. The valve seat insert may include a recess at the distal end. The blank of flexible material may comprise polytetrafluoroethylene. The valve seat insert may include a valve seat surface having a rounded end profile configured to receive a portion of the plug. The end profile of the flexible sleeve may be flush with a portion of the valve seat surface of the valve seat insert.
Drawings
Various embodiments are particularly pointed out and distinctly claimed in the concluding portion of the specification. The following is a summary of the drawings, in which like numerals represent like elements, and in which:
FIG. 1 illustrates an industrial process having a stopcock valve according to various embodiments.
FIG. 2 illustrates a cross-sectional view of a plug valve seat configuration according to various embodiments;
FIG. 3A illustrates a cross-sectional view of a partially assembled valve seat assembly, according to various embodiments;
FIG. 3B illustrates another cross-sectional view of a partially assembled valve seat assembly, in accordance with various embodiments; and
FIG. 3C illustrates a cross-section of an assembled valve seat assembly, according to various embodiments.
Detailed Description
The detailed description of the exemplary embodiments herein refers to the accompanying drawings that show, by way of illustration, the exemplary embodiments and the best mode. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that logical, chemical and mechanical changes may be made without departing from the spirit and scope of the present invention. Accordingly, the detailed description herein is presented for purposes of illustration only and not of limitation. For example, the steps described in any method or process description may be performed in any order and are not necessarily limited to the order presented. Further, many of the functions or steps may be outsourced to or performed by one or more third parties. Furthermore, any reference to the singular includes plural embodiments and any reference to more than one component or step may include a singular component or step. Further, any reference to attached, secured, connected, etc., can include permanent, removable, temporary, partial, complete, and/or any other possible attachment options.
The isolation valve may be operable to control the flow of fluid or slurry in the conduit. For example, referring to fig. 1, an ore processing system 100 is shown. The ore processing system 100 may be used in conjunction with High Pressure Acid Leaching (HPAL), Pressure Oxidation (POX), or any other mining or industrial application in which a solvent is mixed with a material comprising one or more metals and subjected to at least one of, for example, elevated temperature or elevated pressure.
The mixture of solids and liquids, which may be referred to as a slurry, may be subjected to elevated temperatures and/or pressures in the
The
The stopcock valve 104 may include an angle-type isolation valve, and in various embodiments, the stopcock valve 104 may be considered a full or near full valve (full bore valve). Stopcock valve 104 may be configured in an "under flow" orientation in which flow tends to force the valve open as opposed to an "over flow" valve in which flow tends to force the valve closed. In this aspect, the slurry is configured to flow from the
In other embodiments, the stopcock valve 104 may comprise a non-isolation valve, wherein the stopcock valve 104 is used to reduce or regulate pressure and/or flow (as opposed to an isolation valve that operates to block flow through the valve). For example, the stopcock valve 104 may include a vent valve, a flash relief valve or a level control valve, among other types of non-isolation valves.
In operation, the stopcock valve 104 may be actuated to a closed position to fluidly isolate the
Referring to FIG. 2, the plug head assembly portion of the plug valve 104 is shown in cross-section. For convenience, the axial-radial-circumferential (a-R-C) axis is shown in this and other figures. It should be noted that the first component shown displaced in the positive axial direction relative to the second component may be referred to as the distal end of the second component. The
As noted herein, the actual valve trim material does not include ceramic. Conventional autoclave isolation ball valve operations tend to wear the ball portion and seat during opening and closing, the flow of slurry erodes the ball portion and seat during opening and closing, and when the ball portion closes on the seat, solid particles suspended in the slurry become trapped and squeezed, thereby damaging the seat and/or sealing elements (or surfaces) of the ball portion. The repeated combination of these actions quickly creates a leak path for the high pressure, highly corrosive flash stream which quickly and significantly increases the size of the leak path and may damage the seat, ball and valve body. This results in autoclave downtime and associated mass production losses.
In various embodiments, the
In the closed position, the
In various embodiments, the
In various embodiments, the
In various embodiments, the
In various embodiments, the
In various embodiments, the
The desired material flowing through the angular stopcock valve and the rate at which the material is intended to flow are important in the valve design. In various embodiments, a slurry comprising a solid phase and a liquid phase is intended to flow through an angled stopcock. According to compressible flow theory and the thermodynamics of multiphase systems, according to various embodiments, the flow at the throat is choked and flows at local speed of sound. The flow before the throat behaves like an incompressible fluid and the flow after the throat behaves like a compressible supersonic fluid. As the area downstream of the throat expands, the local performance of the fluid is a function of the ratio of the throat area to the local flow area and the upstream fluid supply thermodynamic performance. The supersonic flow performance immediately downstream of the throat is independent of flow conditions away from downstream, such as downstream tank pressure. As the area expands, the velocity increases and the fluid density decreases. These properties are mathematically modeled in accordance with the equations, references and descriptions of Smith in U.S. patent No.7,237,574, which is incorporated herein by reference in its entirety.
Seat surface clearance flow area (A)g) Can be calculated as seat surface ID multiplied by surface gap (A)g=DNoodle×gNoodle). When the
Referring to fig. 3A-3C, methods for assembling a valve assembly according to various embodiments are illustrated. Referring to fig. 3A, the
The flexible material blank 332 may comprise a flexible piece of material (piece), such as rigid or semi-rigid polytetrafluoroethylene, having a central bore sized in diameter to correspond to the outer diameter of the
Referring to fig. 3B, the flexible material blank 332 may be reduced to a reduced
Referring to FIG. 3C, after the flexible material blank 332 is reduced to the reduced outer diameter 334 (forming the sleeve 210), the
Referring back to fig. 2, the
Benefits and other advantages have been described herein with regard to specific embodiments. Furthermore, the connecting lines shown in the various figures contained herein are intended to represent example functional relationships and/or physical couplings between the various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in a practical system. However, the benefits, advantages, and any elements that may cause any benefit or advantage to occur or to become more pronounced are not to be construed as critical, required, or essential features or elements of the disclosure. Thus, the scope of the present disclosure is not to be limited by anything other than the appended claims, in which reference to an element in the singular is not intended to mean "one and only one" unless explicitly so stated, but rather "one or more. Further, where a phrase similar to "at least one of A, B or C" is used in a claim, the phrase is intended to be understood to mean: there may be only a in embodiments, only B in embodiments, only C in embodiments, or any combination of elements A, B and C in a single embodiment, for example, a and B, A and C, B and C or a and B and C.
Systems, methods, and devices are provided herein. In the detailed description herein, references to "various embodiments," "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. After reading this description, it will become apparent to a person skilled in the relevant art how to implement the disclosure in alternative embodiments.
Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element is intended to be incorporated into 35u.s.c.112(f) unless the element is specifically recited using the phrase "method for … …". As used herein, the terms "comprises," "comprising," "includes" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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