Patent Application
20220170558
Some valves include a valve assembly and a main valve body for coupling with the valve assembly. The valve body may include a housing and at least one end connector element extending from the housing. The end connector element is used to secure a pipeline or similar feature to the valve via welding or fasteners. With regard to plug style valves, the valve assembly may include a mounting plate configured to be fixedly coupled to the housing and a plug rotatably extending from the mounting plate into an internal chamber of the housing. The plug includes a plug body configured to inhibit the flow of fluid through the plug when the plug is in a closed state and a plug flow passage extending through the plug body configured to facilitate the flow of fluid through the plug when the plug is in an open state.
Some plug style valves further include a sleeve fixedly secured within the internal chamber of the housing and having an interior cavity for rotatably receiving the plug as well as a pair of apertures for aligning with the plug flow passage when the plug is in the open state. The sleeve may be configured to provide a fluid-tight seal between the plug body and the housing and may be constructed of a polymeric material having a relatively high chemical resistance and a relatively low coefficient of friction, such as Polytetrafluoroethylene (PTFE). Such valves may be referred to as sleeved plug valves.
During assembly of conventional sleeved plug valves, the plug and sleeve are typically both compressed downwardly into the internal chamber of the housing. As a result, relatively high compressive forces may be applied to both the internal and external surfaces of the sleeve. For example, such high compressive forces may be applied between the external surface of the sleeve and the internal surface of the housing, and between the internal surface of the sleeve and the external surface of the plug. These high compressive forces may resist the rotation of the plug between the open and closed states, thereby requiring a relatively high input torque to be applied to the plug in order to achieve such rotation. Thus, it may be desirable to reduce at least some of these compressive forces while maintaining a fluid-tight seal between the plug body and the housing to reduce the amount of input torque needed to rotate the plug.
While the specification concludes with claims which particularly point out and distinctly claim the invention, it is believed the present invention will be better understood from the following description of certain examples taken in conjunction with the accompanying drawings, in which like reference numerals identify the same elements and in which:
The drawings are not intended to be limiting in any way, and it is contemplated that various embodiments of the invention may be carried out in a variety of other ways, including those not necessarily depicted in the drawings. The accompanying drawings incorporated in and forming a part of the specification illustrate several aspects of the present invention, and together with the description serve to explain the principles of the invention; it being understood, however, that this invention is not limited to the precise arrangements shown.
The following description of certain examples of the invention should not be used to limit the scope of the present invention. Other examples, features, aspects, embodiments, and advantages of the invention will become apparent to those skilled in the art from the following description, which is by way of illustration, one of the best modes contemplated for carrying out the invention. As will be realized, the invention is capable of other different and obvious aspects, all without departing from the invention. Accordingly, the drawings and descriptions should be regarded as illustrative in nature and not restrictive.
It will be appreciated that any one or more of the teachings, expressions, versions, examples, etc. described herein may be combined with any one or more of the other teachings, expressions, versions, examples, etc. that are described herein. The following-described teachings, expressions, versions, examples, etc. should therefore not be viewed in isolation relative to each other. Various suitable ways in which the teachings herein may be combined will be readily apparent to those of ordinary skill in the art in view of the teachings herein. Such modifications and variations are intended to be included within the scope of the claims.
A sleeved plug valve is shown in
Valve body (11) of valve (1) may be modular with bimetallic option. As used herein, the phrase “bimetallic option” denotes how elements or features of modular valve body (11) may be comprised of similar materials or optionally may be comprised of different materials. Modular valve body (11) may also be referred to as a hybrid valve body given the two different materials used in its construction in some versions. In some versions, modular valve body (11) may be configured in accordance with at least some of the teachings of U.S. Pat. App. No. 62/937,869, entitled “Modular Valve Body with Bimetallic Option,” filed Nov. 20, 2019, the disclosure of which is incorporated by reference in its entirety.
As best shown in
Housing (13) also includes a pair of generally cylindrical, opposed internal housing surfaces (33) (one shown). Internal housing surfaces (33) define respective housing flow passages (35) to facilitate the flow of fluid through housing (13). Housing (13) also includes a generally cylindrical, central internal housing surface (36) which defines an internal chamber (37) sized to receive a portion of valve assembly (10) therein for selectively restricting the flow of fluid through housing (13), as described in greater detail below. Internal chamber (37) may define a central axis (C) of valve (1) and housing flow passages (35) may extend transversely relative to internal chamber (37), and thus relative to central axis (C).
Modular valve body (11) also includes at least one end connector element (39). When modular valve body (11) is fully assembled, end connector element (39) extends from housing (13). End connector element (39) is generally cylindrical and extends from a top (41) to a bottom (43) and includes a peripheral surface (45) and an external surface (47). End connector element (39) includes a generally cylindrical, internal end surface (49). Internal end surface (49) defines an end flow passage (51) to facilitate the flow of fluid through end connector element (39). When joined with housing (13), end flow passage (51) is in fluid communication with housing flow passage (35). End connector element (39) is configured to be joined with a pipeline to secure the pipeline to modular valve body (11). End connector element (39) further includes a connector flange (55) extending outwardly away from peripheral surface (45). Connector flange (55) includes an outward surface (57) for abutting with a similar flange on a pipeline (not shown). Connector flange (55) defines a plurality of connector bores (59) extending from outward surface (57) through connector flange (55). Connector bores (59) are each sized and positioned to receive a respective bolt or similar connector or fastener (not shown) therethrough. The connector may be passed through a similar connector flange on the pipeline to connect the pipeline to end connector element (39).
As shown, housing (13) and end connector element (39) are joined together to form modular valve body (11). In some versions of modular valve body (11), end connector element (39) is joined to housing (13) by inertial friction welding end connector element (39) onto housing (13), as described in U.S. Pat. App. No. 62/937,869. While valve body (11) has been described as being modular with housing (13) and end connector elements (39) initially formed separately from each other as individual pieces and subsequently joined to each other, valve body (11) may alternatively be unitary, with housing (13) and end connector elements (39) integrally formed (e.g., cast) together as a single piece.
With continuing reference primarily to
Upper hub (65) includes a generally annular upper surface (75) in which a recess (77) (
As best shown in
Support frame (81) defines a plurality of curved slots (93) extending from external lower hub surface (83) to internal lower hub surface (85) partially about the peripheries of respective lower hub apertures (87). In the example shown, four curved slots (93) are arranged about each lower hub aperture (87), with each adjacent pair of curved slots (93) separated from each other by a support rib (95) of support frame (81). Support frame (81) also defines a pair of opposed openings (97) extending from external lower hub surface (83) to internal lower hub surface (85) between lower hub apertures (87) and their corresponding curved slots (93). Support frame (81) further defines a plurality of straight slots (99) extending from external lower hub surface (83) to internal lower hub surface (85) generally above respective openings (97). In the example shown, two straight slots (99) are arranged above each opening (97). As discussed in greater detail below, curved slots (93), openings (97), and straight slots (99) may each be configured to assist in securing another material to support frame.
In this regard, valve assembly (10) also includes a sleeve (101) fixedly coupled to lower hub (67) of cartridge (61). As best shown in
In some versions, sleeve (101) may be constructed of a polymeric material having a relatively high chemical resistance and a relatively low coefficient of friction, such as PTFE or any other suitable polymer. In addition or alternatively, support frame (81) may be constructed of a metallic material to provide substantial structural stability to sleeve (101). In some versions, cartridge (61) may be unitary, with mounting plate (63), upper hub (65), and lower hub (67) (including support frame (81)) integrally formed (e.g., cast) together as a single piece.
Valve assembly (10) further includes a plug (123) rotatably coupled to mounting plate (63) and extending downwardly therefrom into interior cavity (111) of sleeve (101) such that plug (123) is configured to be received together with lower hub (67) and sleeve (101) within internal chamber (37) of housing (3). In this regard, plug (123) includes an input shaft (125) configured to be axially aligned with and rotatably received by central bore (79) of cartridge (61) and a plug body (127) extending downwardly from input shaft (125) such that plug body (127) may be rotatable within interior cavity (111) of sleeve (101) about central axis (C) relative to sleeve (101).
As best shown in
In some versions, plug (123) may be translatable relative to sleeve (101) along central axis (C) for adjusting a height of plug (123) relative to sleeve (101). In this regard, input shaft (125) of the present example has a generally cylindrical external shaft surface (135) which may have at least one helical shaft thread (not shown) defined at least partially therealong, and valve assembly (10) of the present example further includes a height adjustment nut (137) configured to threadably engage external shaft surface (135) of input shaft (125). Nut (137) may be configured to remain at a fixed height relative to cartridge (61) and housing (13) when mounting plate (63) is fixedly coupled to top (15). In the example shown, nut (137) is positioned above upper hub (65). More particularly, valve assembly (10) further includes an annular gasket (139) (
Valve assembly (10) of the present example also includes an annular gasket (143) having a generally wedge-shaped cross section and positioned atop plug body (127) and a corresponding annular gasket (145) having a generally fork-shaped cross section and positioned within central bore (79) of cartridge (61) for sealingly engaging each other to provide a fluid-tight seal therebetween while accommodating relative movement therebetween due to height adjustments of plug (123) relative to sleeve (101) as well as rotation of plug (123) relative to sleeve (101).
Referring now primarily to
When plug (123) is in the open state shown in
It will be appreciated that in some versions, plug (123) may be rotatable about central axis (C) relative to sleeve (101) to one or more intermediate states between the open and closed states (e.g., to one or more “partially open” or “partially closed” states), whereby plug flow passage (133) is only slightly misaligned from apertures (87, 113) of lower hub (67) and sleeve (101) such that housing flow passages (35) may fluidly communicate with each other via plug flow passage (133). In such cases, the slight misalignment of plug flow passage (133) from apertures (87, 113) of lower hub (67) and sleeve (101) may provide a fluid constriction for fluid flowing from one of housing flow passages (35) to the other of housing flow passages (35) through plug flow passage (133).
Since sleeve (101) is fixed against movement relative to housing (13), the fluid-tight seal between external sleeve surface (105) and internal housing surface (36) may be static. Conversely, since plug (123) is rotatable about central axis (C) relative to sleeve (101), the fluid-tight seal between external plug surface (129) and internal sleeve surface (109) may be dynamic. Due to the spacing apart of inner sleeve portion (107) from outer sleeve portion (103) by channels (119) and support frame (81), these static and dynamic seals may be separated from and substantially independent of each other, at least by comparison to conventional sleeved plug valve configurations. Such separation of the static and dynamic seals may enable a reduction in the amount of input torque needed to rotate plug (123) for actuating valve (1) by reducing the compressive force to external plug surface (129).
In this regard, during assembly of valve (1), plug (123) including plug body (127) may be initially positioned within interior cavity (111) of sleeve (101) at a first height relative to sleeve (101) such that external plug surface (129) is disengaged (e.g., spaced apart) from internal sleeve surface (109). Sleeve (101), together with lower hub (67), may then be compressed downwardly into internal chamber (37) of housing (13). As a result, relatively high compressive forces may be applied to external sleeve surface (105) but may not be transferred to internal sleeve surface (109). For example, such high compressive forces may only be applied between external sleeve surface (105) and internal housing surface (36). These high compressive forces may assist in resisting any rotation of sleeve (101) relative to housing (13). Moreover, due to the separation of the static and dynamic seals, these high compressive forces may provide limited or no resistance to the rotation of plug (123) about central axis (C) relative to sleeve (101).
As shown in
Thus, the amount of input torque needed to rotate plug (123) for actuating valve (1) may be substantially reduced as compared to that needed to actuate a similar valve having a conventional sleeved plug configuration. In some versions, the amount of input torque needed to rotate plug (123) for actuating valve (1) may be reduced by approximately 50% as compared to that needed to actuate a similar valve having a conventional sleeved plug configuration.
After prolonged operation of valve (1), the seal between external plug surface (129) and internal sleeve surface (109) may eventually start to leak, such as due to normal wear. In such cases, plug body (127) may again be raised further upwardly to a third height relative to sleeve (101) to sealingly re-engage external plug surface (129) with internal sleeve surface (109) and thereby re-establish a fluid-tight seal therebetween, such as via additional rotation of nut (137) relative to input shaft (125). In this manner, the adjustable height of plug (123) relative to sleeve (101) may allow the seal between external plug surface (129) and internal sleeve surface (109) to be maintained and/or repaired without requiring disassembly of valve (1) or removal of valve (1) from operation.
While the separation of static and dynamic seals from each other has been described above with respect to sleeved plug valve (1) for reducing the amount of input torque needed to actuate valve (1), it will be appreciated that various other types of valves may include separate static and dynamic seals for reducing the amount of input torque needed to actuate such valves. For example, such separation of static and dynamic seals may be incorporated into any valve having first and second static members with a static seal therebetween, and a dynamic member with a dynamic seal between the dynamic member and one or both of the static members, such as by spacing apart or otherwise separating or isolating the static and dynamic seals from each other.
A second sleeved plug valve is shown in
Main valve body (1011) of the present version is generally similar to valve body (11) described above. Valve assembly (1010) of the present version is generally similar to valve assembly (10) described above, but replaces cartridge (61) with a different cartridge (1061). As shown, rather than having mounting plate (63), upper hub (65), and lower hub (67) that are integrally formed together as a unitary piece like cartridge (61), cartridge (1061) of the present version is a multi-piece construction. More particularly, cartridge (1061) includes a mounting plate (1063), an upper hub (1065), and a lower hub (1067) separately formed from each other as distinct pieces. Mounting plate (1063), upper hub (1065), and lower hub (1067) are generally similar to mounting plate (63), upper hub (65), and lower hub (67) described above, respectively, except as described below.
In the present version, mounting plate (1063) defines a central opening (1068) configured to selectively receive portions of upper and lower hubs (1065, 1067). Lower hub (1067) includes an upwardly-facing ledge (1072) configured to abut a lower surface of mounting plate (1063) when lower hub (1067) is positioned within internal chamber (37) of housing (3) and mounting plate (1063) is coupled to top (15) for assisting with preventing lower hub (1067) from being inadvertently dislodged from internal chamber (37). Upper hub (1065) includes a threaded bore (1074) configured to threadably engage a portion of lower hub (1067) to thereby fixedly couple upper hub (1065) to lower hub (1067) while permitting selective removal of upper hub (1065) from lower hub (1067). To that end, lower hub (1067) includes a threaded exterior (1076) configured to threadably engage threaded bore (1074) of upper hub (1065).
As shown, rather than leaving portions of a support frame (1081) of lower hub (1067) exposed (like the inner peripheries of rims (89, 91) of lower hub (67)), a sleeve (1101) may substantially entirely encapsulate support frame (1081). For example, sleeve apertures (1113) may cover the inner peripheries of the rims of lower hub apertures (not shown) of lower hub (1067) to more fully encapsulate support frame (1081).
The following examples relate to various non-exhaustive ways in which the teachings herein may be combined or applied. It should be understood that the following examples are not intended to restrict the coverage of any claims that may be presented at any time in this application or in subsequent filings of this application. No disclaimer is intended. The following examples are being provided for nothing more than merely illustrative purposes. It is contemplated that the various teachings herein may be arranged and applied in numerous other ways. It is also contemplated that some variations may omit certain features referred to in the below examples. Therefore, none of the aspects or features referred to below should be deemed critical unless otherwise explicitly indicated as such at a later date by the inventors or by a successor in interest to the inventors. If any claims are presented in this application or in subsequent filings related to this application that include additional features beyond those referred to below, those additional features shall not be presumed to have been added for any reason relating to patentability.
A valve assembly comprising: (a) a plug extending along a central axis and including a plug body having an external plug surface, wherein the external plug surface tapers radially outwardly in a first direction along the central axis; and (b) a sleeve having an internal sleeve surface defining an interior cavity, wherein the internal sleeve surface tapers radially outwardly in the first direction, wherein the plug body is positioned within the interior cavity of the sleeve, wherein the plug is rotatable about the central axis relative to the sleeve, wherein the plug is translatable along the central axis relative to the sleeve.
The valve assembly of any of the previous or subsequent Examples, wherein the plug further includes an input shaft extending from the plug in a second direction along the central axis.
The valve assembly of any of the previous or subsequent Examples, wherein the plug is configured to rotate about the central axis relative to the sleeve in response to application of an input torque to the input shaft.
The valve assembly of any of the previous or subsequent Examples, wherein the valve assembly further comprises a nut having a fixed position along the central axis relative to the sleeve, wherein the nut threadably engages the input shaft, wherein the plug is configured to translate along the central axis relative to the sleeve in response to rotation of the nut relative to the input shaft.
The valve assembly of any of the previous or subsequent Examples, wherein the external plug surface is configured to sealingly engage the internal sleeve surface when the plug is at a first position along the central axis relative to the sleeve, wherein the external plug surface is configured to disengage the internal sleeve surface when the plug is at a second position along the central axis relative to the sleeve.
The valve assembly of any of the previous or subsequent Examples, wherein the external plug surface tapers radially outwardly in the first direction along the central axis at a first angle, wherein the internal sleeve surface tapers radially outwardly in the first direction at the first angle.
The valve assembly of any of the previous or subsequent Examples, wherein the plug includes a plug flow passage extending through the plug body.
The valve assembly of any of the previous or subsequent Examples, wherein the sleeve includes a pair of opposed sleeve apertures, wherein the plug flow passage is configured to selectively align with the pair of opposed sleeve apertures.
The valve assembly of any of the previous or subsequent Examples, wherein the plug flow passage is transverse to the central axis.
A valve comprising: (a) a housing including an internal chamber; and (b) the valve assembly of any of the previous or subsequent Examples, wherein the sleeve is positioned within the internal chamber of the housing and fixed against movement relative thereto.
A valve comprising: (a) a housing including an internal housing surface defining an internal chamber extending along a central axis; and (b) a valve assembly including: (i) a plug extending along the central axis and including a plug body having an external plug surface, and (ii) a sleeve positioned within the internal chamber of the housing and fixed against movement relative thereto, the sleeve having: (A) an outer sleeve portion including an external sleeve surface configured to sealingly engage the internal housing surface of the housing, and (B) an inner sleeve portion at least partially spaced apart from the outer sleeve portion and including an internal sleeve surface defining an interior cavity for rotatably receiving the plug body, wherein the internal sleeve surface is configured to sealingly engage the external plug surface of the plug body.
The valve of any of the previous or subsequent Examples, wherein the external sleeve surface and the internal housing surface are configured to collectively define a static seal.
The valve of any of the previous or subsequent Examples, wherein the internal sleeve surface and the external plug surface are configured to collectively define a dynamic seal.
The valve of any of the previous or subsequent Examples, wherein the inner sleeve portion is at least partially spaced apart from the outer sleeve portion by at least one channel.
The valve of any of the previous or subsequent Examples, wherein the inner sleeve portion is coupled to the outer sleeve portion by at least one connecting portion.
A method comprising: (a) providing a valve, wherein the valve includes: (i) a housing having an internal chamber defining a central axis, (ii) a sleeve positioned within the internal chamber of the housing and fixed against movement relative thereto, the sleeve including an internal sleeve surface defining an interior cavity, and (iii) a plug extending along the central axis and including a plug body, the plug body being positioned within the interior cavity and having an external plug surface, wherein the plug is initially at a first location along the central axis relative to the sleeve such that the external plug surface is spaced apart from the internal sleeve surface; and (b) translating the plug along the central axis from the first location to a second location relative to the sleeve.
The method of any of the previous or subsequent Examples, wherein the act of translating the plug includes sealingly engaging the external plug surface with the internal sleeve surface.
The method of any of the previous or subsequent Examples, wherein the act of providing the valve includes inserting the sleeve into the internal chamber of the housing in a first direction along the central axis, wherein the act of translating the plug includes translating the plug along the central axis in a second direction.
The method of any of the previous or subsequent Examples, wherein the second direction is opposite from the first direction.
The method of any of the previous or subsequent Examples, wherein the act of inserting the sleeve includes applying a compressive force to an external sleeve surface of the sleeve.
A valve comprising: (a) a first static member; (b) a second static member secured against movement relative to the first static member; (c) a static seal between the first and second static members; (d) a dynamic member movable relative to the first and second static members between an open state and a closed state; and (e) a dynamic seal between the dynamic member and at least one of the first or second static members.
The valve of any of the previous or subsequent Examples, wherein the dynamic seal is separate from the static seal.
The valve of any of the previous or subsequent Examples, wherein the dynamic seal is spaced apart from the static seal.
It should be understood that any of the examples described herein may include various other features in addition to or in lieu of those described above. By way of example only, any of the examples described herein may also include one or more of the various features disclosed in any of the various references that are incorporated by reference herein.
It should be understood that any one or more of the teachings, expressions, embodiments, examples, etc. described herein may be combined with any one or more of the other teachings, expressions, embodiments, examples, etc. that are described herein. The above-described teachings, expressions, embodiments, examples, etc. should therefore not be viewed in isolation relative to each other. Various suitable ways in which the teachings herein may be combined will be readily apparent to those of ordinary skill in the art in view of the teachings herein. Such modifications and variations are intended to be included within the scope of the claims.
Any one or more of the teachings, expressions, embodiments, examples, etc. described herein may be combined with any one or more of the teachings, expressions, embodiments, examples, etc. described in U.S. Pat. App. No. 63/119,335, entitled “Molded Plug Cartridge With Fluoropolymer,” filed Nov. 30, 2020; and/or U.S. Pat. App. No. 63/119,339, entitled “Sleeved Plug Valve With Removable Cartridge and Modular Option For Valve Body,” filed Nov. 30, 2020. The disclosure of each of these applications is incorporated by reference herein.
It should be appreciated that any patent, publication, or other disclosure material, in whole or in part, that is said to be incorporated by reference herein is incorporated herein only to the extent that the incorporated material does not conflict with existing definitions, statements, or other disclosure material set forth in this disclosure. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting material incorporated herein by reference. Any material, or portion thereof, that is said to be incorporated by reference herein, but which conflicts with existing definitions, statements, or other disclosure material set forth herein will only be incorporated to the extent that no conflict arises between that incorporated material and the existing disclosure material.
Having shown and described various versions of the present invention, further adaptations of the methods and systems described herein may be accomplished by appropriate modifications by one of ordinary skill in the art without departing from the scope of the present invention. Several of such potential modifications have been mentioned, and others will be apparent to those skilled in the art. For instance, the examples, versions, geometrics, materials, dimensions, ratios, steps, and the like discussed above are illustrative and are not required. Accordingly, the scope of the present invention should be considered in terms of the following claims and is understood not to be limited to the details of structure and operation shown and described in the specification and drawings.
This application claims the benefit of U.S. Pat. App. No. 63/119,330, entitled “Torque Reduction Valve Having Separate Static Seal and Dynamic Seal,” filed Nov. 30, 2020, the disclosure of which is incorporated by reference herein.
| Number | Date | Country | |
|---|---|---|---|
| 63119330 | Nov 2020 | US |
