Fluid valve with variable fluid passage

Abstract

Various embodiments of the present disclosure are directed to fluid valves with variable fluid passages. An exemplary fluid valve with a non-circular flow passage is disclosed. The exemplary fluid valve includes a body that defines a fluid passage between an inlet and an outlet, and when taken along a plane transverse to the direction of fluid flow, at least a portion of the fluid passage between the inlet and the outlet has a generally non-circular cross-sectional shape, the cross-sectional shape including a curved central axis, and the generally non-circular cross-sectional shape has an outwardly curved end wall and a curved side wall connecting the curved end wall.

Description

Technical Field

[0001] The present disclosure relates generally to valves and, more particularly, to fluid valves having non-circular flow paths. Background Art

[0002] Industrial processing plants use control valves in a variety of applications such as, for example, controlling product flow in food processing plants, maintaining fluid levels in large tank farms, etc. Control valves are used to manage product flow, or to maintain fluid levels by operating like a variable passage. Summary of the invention

[0003] An exemplary fluid valve includes a body defining a fluid passage between an inlet and an outlet, wherein at least a portion of the fluid passage between the inlet and the outlet has a generally non-circular cross-sectional shape when cut along a plane transverse to a direction of fluid flow, the cross-sectional shape including a curved central axis, the generally non-circular cross-sectional shape having outwardly curved end walls and curved side walls connecting the curved end walls.

[0004] An exemplary fluid valve includes a body defining an inlet, an outlet, and a fluid passage fluidly connecting the inlet and the outlet, wherein at least a portion of the fluid passage between the inlet and the outlet has a generally bean-shaped cross-section when cut along a plane transverse to a direction of fluid flow through at least a portion of the fluid passage.

[0005] An exemplary fluid valve includes a body defining a fluid passage between an inlet and an outlet, at least a portion of the fluid passage defining a cross-sectional shape that varies between a generally circular shape and a generally bean-shaped shape in a direction of fluid flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is an example control valve having an example valve body constructed in accordance with the teachings of the present disclosure.

[0007] Figure 2 yes Figure 1 A cross-sectional view of an exemplary control valve.

[0008] Figure 3A yes Figure 1 and Figure 2 A cross-sectional view of an exemplary valve body.

[0009] Figure 3B yes Figure 3A Perspective section view of .

[0010] Figure 3C yes Figure 1 and Figure 2 End view of an exemplary valve body.

[0011] Figure 4 yes Figure 1 and Figure 2 A perspective view of a portion of a fluid passageway of an exemplary valve body.

[0012] Figure 5 is the edge of an exemplary valve body Figure 4 A cross-sectional view taken along line 5-5.

[0013] Figure 6 is the edge of an exemplary valve body Figure 4 A cross-sectional view taken along line 6-6.

[0014] Figure 7 is the edge of an exemplary valve body Figure 4 A cross-sectional view taken along line 7-7.

[0015] Figure 8 is the edge of an exemplary valve body Figure 4 A cross-sectional view taken along line 8-8.

[0016] Fig. 9 is the edge of an exemplary valve body Figure 4 A cross-sectional view taken along line 9-9.

[0017] Fig.10 is the edge of an exemplary valve body Figure 4 An enlarged cross-sectional end view taken along line 8-8.

[0018] Fig.11 yes Figure 1 and Figure 2 A perspective cross-sectional view of an exemplary valve body.

[0019] Fig.12 is a cross-sectional view of a portion of a known valve body having a circular fluid passage.

[0020] The drawings are not drawn to scale. Instead, the thickness of a layer or region may be exaggerated in the drawings. In general, the same reference numerals will be used to refer to the same or similar parts throughout the drawings (multiple) and the accompanying written description. Although the drawings show layers and regions with clean lines and boundaries, some or all of these lines and / or boundaries may be idealized. In reality, boundaries and / or lines may be unobservable, mixed and / or irregular. DETAILED DESCRIPTION

[0021] Fluid valves are often used to control fluid flow through a valve body. In some cases, the fluid passage of a fluid valve can contribute to flow separation, resulting in a loss of flow area efficiency and / or increased pressure loss, which reduces valve flow performance. For example, Fig.12 1 is a cross-sectional view of a known valve body 10 that defines a fluid passage 12 between an inlet 14 and an outlet 16. The fluid passage 12 has a sharp / shallow turn profile 18 adjacent to an orifice 20 of the fluid passage 12. As the fluid flows through the fluid passage 12 and accelerates about a radius from a lower body passage 21 toward the outlet 16, the fluid flow experiences an adverse pressure gradient (e.g., a pressure gradient that acts opposite to the local flow momentum of the bulk fluid flow) in the direction of the fluid flow 22. This pressure gradient may cause an undesirable effect that causes a boundary layer to separate from an inner wall 24 of the valve body 10 that defines the fluid passage 12. This flow separation may result in a reduced local effective flow area, resulting in a loss of flow area efficiency and / or increased pressure losses. In some cases, this flow separation may result in system noise and vibration.

[0022] The exemplary fluid valve disclosed herein reduces boundary layer separation to improve fluid flow efficiency, reduce noise, vibration, cavitation, etc. In order to reduce boundary layer separation, the exemplary fluid valve disclosed herein adopts a fluid channel, wherein at least a portion of the fluid channel has a non-circular profile (i.e., a cross section transverse to the direction of fluid flow). The fluid channel provides a relatively smooth and / or gradual transition between a portion of the fluid channel having a circular profile and a portion of the fluid channel having a non-circular profile. For example, the non-circular profile can have a bean-shaped shape (i.e., a bean-shaped cross section taken along the direction transverse to the fluid flow). The non-circular profile provides a straighter fluid flow path in the direction of fluid flow. In addition, the non-circular profile causes local cross-flow to reduce and / or prevent boundary layer separation and improve flow efficiency. This cross-flow can be caused by a local pressure difference acting from the outside to the inside of the cross-section, and reduces the amplitude of the reverse pressure gradient along the flow direction, thereby delaying and / or preventing the separation of the boundary layer and the related effects on valve flow performance. Additionally, the non-circular flow passages provide strength in the web thickness region to allow for more cross-sectional area above the minimum web thickness height.

[0023] Figure 11 is an example control valve assembly 100 having an example fluid valve 102 constructed in accordance with the teachings of the present disclosure. The control valve assembly 100 of the illustrated example includes the fluid valve 102 coupled to an actuator 104 (e.g., a pneumatic actuator) via a valve cover 106. To control the fluid flowing through the fluid valve 102, the control valve assembly 100 includes a controller 108 (e.g., a digital controller). Although reference is made to Figure 1 The exemplary control valve assembly 100 of FIG. 1 depicts an exemplary fluid valve 102 , but it should be understood that the exemplary fluid valves and / or fluid passages described herein may be used with any number and / or type of fluid valves. For example, although Figure 1 The illustrated fluid valve 102 is a sliding stem control valve, but the exemplary fluid valves and / or flow passages disclosed herein may be used with any other type(s) of valves, including but not limited to rotary control valves, quarter-turn control valves, etc., and / or any other suitable fluid valve(s).

[0024] Figure 2 yes Figure 1 1 is a cross-sectional view of an exemplary fluid valve 102. The exemplary fluid valve 102 has a valve body 200 that defines an inlet 202, an outlet 204, and a fluid passage 206 connecting the inlet 202 and the outlet 204. A valve core assembly 208 is disposed within the fluid passage 206. The valve cap 106 retains the valve core assembly 208 in the valve body 200. The valve core assembly 208 includes a retainer 210 and a valve seat 212. A closing member 214 (e.g., a valve plug) is disposed within the retainer 210. Specifically, the closing member 214 is movable or slidable within the retainer 210, and the closing member 214 interacts with the valve seat 212 to control the flow of fluid through an orifice 216 of the fluid passage 206. The rod 218 couples the closing member 214 to the actuator 104 ( Figure 1 ).exist Figure 2 In some examples, the fluid valve 102 can be configured in a downward flow configuration (eg, the inlet 202 and the outlet 204 are reversed).

[0025] In operation, the controller 108 ( Figure 1) supplies a control fluid (e.g., compressed air) from a supply source to the actuator 104. The control fluid provides a pressure differential across a sensing element of the actuator 104 to move the closure member 214 relative to the valve seat 212 to regulate fluid flow through the fluid passage 206. For example, the actuator 104 controls movement (e.g., linear movement) of the closure member 214 relative to the valve seat 212 (e.g., bidirectionally) between a fully closed position and a fully open position to regulate fluid flow through the fluid passage 206. The actuator 104 moves the closure member 214 relative to the valve seat 212 between a closed position (e.g., a fully closed position) in which the closure member 214 (e.g., sealingly) engages the valve seat 212 and a fully open position or a maximum flow position (e.g., a fully open position) in which the closure member 214 is positioned a distance from the valve seat 212. Additionally, the valve trim assembly 208 provides certain fluid flow characteristics to the fluid flowing through the fluid passage 206 . Figure 2 The retainer 210 includes an opening 220 to characterize fluid flow (e.g., reduce noise, reduce cavitation, etc.) when the fluid flows through the fluid channel 206. The size and / or shape of the opening 220 of the retainer 210 can be set to provide the desired fluid flow characteristics (e.g., reduce noise, reduce cavitation, etc.). In some examples, the retainer 210 includes a plurality of openings.

[0026] In operation, the fluid passage 206 of the illustrated example provides improved flow efficiency by causing cross flow, reducing the severity of flow separation, reducing dead flow areas, and / or allowing a smoother flow passage. In addition, the fluid passage 206 of the illustrated example allows a shorter (e.g., more abrupt) face-to-face transition (e.g., transition from valve inlet to valve outlet) without compromising the structural strength of the web of the valve. The shorter face-to-face transition provides a more abrupt or abrupt transition between the inlet 202 / outlet 204 to the orifice 216 of the valve body 200. For example, the valve 100 of the illustrated example has a more abrupt transition between the inlet 202 and the outlet 204 to the orifice 216 portion of the fluid passage 206 compared to a valve implemented without the fluid passage 206 disclosed herein. However, in some examples, the fluid passage 206 and / or the retainer 210 provide improved flow efficiency while providing a shorter face-to-face transition. In some examples, retainers of different styles may be employed.

[0027] Figure 3A yes Figure 1 1 is a cross-sectional view of an exemplary fluid valve 102. Figure 3B yes Figure 3A Perspective section view of . Figure 3C yes Figure 1 , Figure 2 , Figure 3A and Figure 3B An end view of an exemplary fluid valve 102 is shown. Specifically, Figure 3C This is from the perspective of the entrance 202. FIG. 3A to FIG. 3C The valve body 200 defines an inner wall 302 (eg, inner surface) that defines the fluid passage 206 between the inlet 202 and the outlet 204. For example, the inner wall 302 of the valve body 200 between the inlet 202 and the outlet 204 defines the shape of the fluid passage 206.

[0028] The fluid channel 206 of FIG. 3 includes a constant flow path portion 301 between the inlet 202 and the outlet 204. The constant flow path has a substantially circular profile (e.g., a substantially circular cross-sectional shape). To improve the flow efficiency of the fluid valve 102, the fluid channel 206 has at least a variable flow path portion 300 between the inlet 202 and the outlet 204. The variable flow path portion 300 of the fluid channel 206 has a non-circular profile (e.g., a substantially non-circular cross-sectional shape). For example, the non-circular shape is a substantially bean-shaped shape (see FIG. 2 ). Fig.10 ). Thus, the shape of the fluid channel 206 varies between substantially circular and substantially non-circular.

[0029] As used herein, the “cross-sectional shape,” “fluid profile,” “circular shape,” “non-circular shape,” or “bean-shaped shape” of a fluid channel 206 refers to the cross-sectional shape of the fluid channel 206 (e.g., defined by the inner wall 302 of the valve body 200) taken along a plane that is transverse to the direction 304 of fluid flow through the fluid channel 206.

[0030] For example, in Figure 3C In the figure, the inlet 202 of the fluid channel 206 provides a flow path having a generally circular cross-section transverse to the direction of fluid flow, and the changing flow path portion 300 provides a flow path having a geometrically bean-shaped cross-section transverse to the direction 304 of fluid flow. FIG. 3A to FIG. 3C The inlet 202, outlet 204, and orifice 216 of the fluid channel 206 have a circular cross-sectional shape transverse to the direction of fluid flow. Therefore, the cross-sectional shape of the fluid channel 206 changes from a generally circular shape adjacent to the inlet 202 to a generally non-circular shape defined by the changing flow path portion 300, and then changes to a generally circular shape adjacent to the orifice 216 and / or the outlet 204. In addition, the fluid channel 206 has a relatively straight profile (e.g., with respect to the direction 304 of fluid flow (e.g., bulk fluid flow) Fig.12In this manner, the varying flow path portion 300 provides a more gradually tortuous flow path 300a as the fluid flows toward the orifice 216 and the outlet 204, which reduces and / or prevents adverse pressure gradients and / or boundary layer separation.

[0031] exist FIG. 3A to FIG. 3C In some examples, the changing flow path portion 300 is formed between the inlet 202 and the orifice 216 (e.g., the lower core 306 of the valve body 200). In some examples, the changing flow path portion 300 may be formed in the valve body 200 between the orifice 216 and the outlet 204 (e.g., the upper core 308 of the valve body 200). In some examples, the fluid valve may include a first changing flow path portion (e.g., the changing flow path portion 300) between the inlet 202 and the orifice 216, and a second changing flow path portion (e.g., the changing flow path portion 300) between the orifice 216 and the outlet 204. In some examples, the lower core 306 and / or the upper core 308 may have a first changing flow path and a second changing flow path portion.

[0032] Figure 4 3 is a perspective view of a portion of the fluid channel 206 including the variable flow path portion 300. For clarity, Figure 4 , the variable flow path portion 300 is shown as being defined by the inner wall 302 of the valve body 200, and other portions of the valve body 200 are not shown. Figure 4 , the changing flow path portion 300 includes a first section 402 (e.g., a first end 402a), a second section 404 (e.g., a middle section), and a third section 406 (e.g., a second end 406a). The second section 404 is positioned between the first section 402 and the third section 406. The first section 402, the second section 404, and the third section 406 define a length 408 of the changing flow path portion 300. Figure 4 4 , the first section 402 defines the inlet 202 and the third section 406 defines the orifice 216 (eg, a portion of the valve body 200 that receives the valve seat 212 ). Figure 4The changing flow path portion 300 has an L-shape. In addition, the sides 410, 412 of the inner wall 302 of the valve body 200 taper outwardly between the first section 402 and a portion 414 (e.g., a midpoint) of the second section 404, and taper inwardly between the portion 414 (e.g., a midpoint) of the second section 404 and the third section 406 (e.g., the orifice 216). In addition, the upper surface 416 of the inner wall 302 defining the portion 414 of the second section 404 is recessed or inset to protrude into the fluid channel 206 between the sides 410, 412. In some examples, the first section 402 may define the outlet 204 and / or any other portion of the fluid channel 206. In some examples, the third section 406 may define the outlet 204 and / or any other portion of the fluid channel 206. In some examples, the changing flow path portion 300 may have a substantially straight shape (i.e., non-L-shaped) and / or any other shape.

[0033] The varying flow path portion 300 has a cross-sectional shape that varies between a generally circular shape and a generally non-circular shape in the direction 304 of fluid flow and / or along a segment of the length 408. For example, Figures 5 to 9 Different cross-sectional views of the varying flow path portion 300 are shown, taken along lines 5 - 5 , 6 - 6 , 7 - 7 , 8 - 8 , and 9 - 9 , respectively.

[0034] Figure 5 The edge of the valve body 200 Figure 4 The cross-sectional perspective view taken along line 5-5 of FIG. The cross-sectional view includes a fourth section 500 of the variable flow path portion 300, which has a substantially elliptical cross-sectional shape. The fourth section 500 is positioned between the first section 402 and the second section 404 (eg, the midpoint of the second section 404).

[0035] Figure 6 The edge of the valve body 200 Figure 4 A cross-sectional perspective view taken along line 6-6. Figure 7 It is the edge of the valve body 200 Figure 4 A cross-sectional perspective view taken along line 7-7. Figure 6 and Figure 7 The cross-sectional perspective view of 206 shows the transition of the respective sections 602 , 702 of the fluid channel 206 to the bean-shaped cross-sectional shape of the varying flow path portion 300 .

[0036] Figure 8 It is the edge of the valve body 200 Figure 4 Specifically, Figure 8 It is taken along the midpoint 800 (eg, the middle portion) of the second segment 404 . Figure 8The changing flow path portion 300 has a generally bean-shaped cross-sectional shape. Figure 8 As shown, a portion 802 of the bean-shaped cross-sectional shape protrudes into the fluid flow channel 206. The bean-shaped cross-sectional shape of the variable flow path portion 300 and / or the protrusion 802 (e.g., the increased thickness of the protrusion 802) provides improved structural support compared to conventional fluid valve bodies. For example, the bean-shaped cross-section (e.g., the geometry of the variable flow path portion 300) enables the thickness 804 of the web portion 806 to be reduced at the bean-shaped cross-sectional location while maintaining the structural integrity of the valve body 200 (e.g., compared to a valve without a bean-shaped cross-section).

[0037] Fig. 9 It is the edge of the valve body 200 Figure 4 A cross-sectional perspective view taken along line 9-9 of . The cross-sectional view includes a fifth segment 900 of the varying flow path portion 300 having a substantially elliptical cross-sectional shape. The fifth segment 900 is positioned between the second segment 404 (e.g., a midpoint 800 of the second segment 404) and the second end 406a. In some examples, the improved structural strength provided by the geometry of the bean-shaped cross-sectional shape can allow for a reduced thickness 902 of the web portion 904 without reducing the overall strength of the web of the valve body. In some examples, the web portion 904 does not include a reduced thickness (e.g., compared to a valve implemented without the fluid passage 206). As Fig. 9 As shown, the web portion 904 is the thickness 902 of the valve body 200 between the lower flow channel 306 and the upper flow channel 308. The web portion 904 provides structural support to receive the retainer 210 and / or the plug 214, and can withstand the load (e.g., closing force) applied to the valve plug 214 by the actuator 104.

[0038] Reference Figures 4 to 9, the fluid channel 206 changes from a substantially circular cross-sectional shape provided at the first end 402a (e.g., the first section 402) to a substantially non-circular cross-sectional shape provided by the second section 404 (e.g., the middle section), and then changes to a substantially circular cross-sectional shape provided by the second end 406a (e.g., the third section 406). Although the fluid channel 206 has a circular portion and a non-circular portion, the changing flow path portion 300 provides a relatively smooth and / or gradual transition between the circular shaped portion of the fluid channel 206 and the non-circular portion of the fluid channel 206. For example, the changing flow path portion 300 defines a changing fluid flow path in the direction 304 of fluid flow, which changes from a generally circular cross-section (e.g., at the first end 402a) to a generally elliptical cross-section (e.g., at the fourth segment 500), to a generally bean-shaped cross-section (e.g., at the midpoint 800), to a generally elliptical cross-section (e.g., at the fifth segment 900), and then to a generally circular cross-section (e.g., at the second end 406a).

[0039] Fig.10 It is the edge of the valve body 200 Figure 4 The bean-shaped cross-sectional shape includes a curved central axis 1002, with outwardly curved end walls 1004, 1006 and curved side walls 1008, 1010 connecting the curved end walls 1004, 1006. For example, Fig.10 The bean-like shape of the embodiment includes a first outwardly curved end wall 1004a having a first radius of curvature 1004b and a second outwardly curved end wall 1006a having a second radius of curvature 1006b. For example, the outwardly curved end walls 1004, 1006 have a shape corresponding to a segment of a circle (e.g., a semicircle). One of the curved side walls 1010 has a radius of curvature that is significantly greater than another of the curved side walls 1008. For example, the first curved side wall 1008a (e.g., at Fig.10 The upper curved sidewall in the orientation of ) has a third radius of curvature 1008b, and the second curved sidewall 1010a (e.g., in Fig.10 The lower curved sidewall in the orientation of has a fourth radius of curvature 1010b that is different from (eg, greater than) the third radius of curvature 1008b. Fig.10 The bean shape is a kidney-shaped bean shape.

[0040] In other words, the changing flow path portion 300 includes a first edge 1012 (e.g., a first portion) having a partially circular profile, a second edge 1014 (e.g., a second portion) spaced apart from the first edge 1012 having a partially circular profile, and an intermediate portion 1016 between the first edge 1012 and the second edge 1014, the intermediate portion 1016 connecting the first edge 1012 and the second edge 1014. The first edge 1012, the intermediate portion 1016, and the second edge 1014 provide a continuous (e.g., smooth and / or uninterrupted) cross-sectional profile. The first edge 1012 defines a first end 1012a and a second end 1012b, and the second edge 1014 defines a third end 1014a and a fourth end 1014b. The intermediate portion 1016 has a third edge 1016a (e.g., a first transition) and a fourth edge 1016b (e.g., a second transition) opposite to the third edge 1016a. The third edge 1016a connects the first end 1012a and the third end 1014a. The fourth edge 1016b connects the second end 1012b and the fourth end 1014b. The first edge 1012, the second edge 1014, the third edge 1016a and the fourth edge 1016b have a curved profile. The third edge 1016a and the fourth edge 1016b are Fig.10 The first edge 1012 and the second edge 1014 each have a first surface 1018 that is offset relative to the middle portion 1016 (e.g., the curved sidewalls 1008, 1010). Fig.10 In the orientation, the first edge 1012 and the second edge 1014 are at a higher height than the middle portion 1016 (eg, the first curved sidewall 1008a and the second curved sidewall 1010a).

[0041] The radius of curvature 1004b of the first outwardly curved end wall 1004a can be between approximately 0.8 inches and 1.60 inches. The radius of curvature 1006b of the second outwardly curved end wall 1006a can be between approximately 0.80 inches and 1.60 inches. In some examples, the first radius of curvature 1004b is equal to the second radius of curvature 1006b. In some examples, the first radius of curvature 1004b is different from (e.g., greater than or less than) the second radius of curvature 1006b. The third radius of curvature 1008b of the first curved sidewall 1008a can be between approximately 1.25 inches and 2.5 inches. The radius of curvature 1010b of the second curved sidewall 1010a can be between approximately 3.75 inches and 6.0 inches. The upper surface 416 of the inner wall 302 can have a width 1020 between approximately 1.75 inches and 3.0 inches, and a height 1022 between approximately 0.5 inches and 1.25 inches. The third edge 1016a is spaced apart from the fourth edge 1016b by a distance 1024 of between approximately 1.75 inches and 3.0 inches at a midpoint between the third edge 1016a and the fourth edge 1016b (e.g., at Fig.10 vertical distance in the orientation).

[0042] exist Fig.10 In the example of , the cross-sectional flow area provided by the varying flow path portion 300, taken at line 5-5, is substantially equal to the cross-sectional flow area provided by the inlet 202. As used herein, "substantially equal to" means equal to within 10% of. For example, the cross-sectional flow area of ​​the bean-shaped cross-sectional shape can be within 10% of the cross-sectional flow area of ​​the circular cross-section provided by the inlet 202. For example, the flow area provided by the bean-shaped cross-sectional shape is substantially equal to the cross-sectional flow area provided by the inlet of a fluid valve having a six-inch diameter. However, in some examples, Fig.10 The cross-sectional flow area of ​​the bean-shaped cross-section is different from (eg, smaller than or larger than) the cross-sectional flow area provided by inlet 202. In some examples, Fig.10 The cross-sectional flow area of ​​the bean-shaped cross-section can be based on the cross-sectional flow area of ​​the orifice 216, the cross-sectional flow area of ​​the outlet 204, and / or any other cross-sectional flow area of ​​the fluid passage 206. The fluid valve 102 of the illustrated example can be a six-inch valve (e.g., a six-inch diameter inlet), a four-inch valve (e.g., a four-inch diameter inlet), and / or any other size valve(s).

[0043] In addition, the bean-shaped profile causes local cross-flow to reduce and / or prevent boundary layer separation and improve flow efficiency. This cross-flow can be caused by a local pressure difference acting from the outside (e.g., outward curved end walls 1004, 1006) of the bean-shaped cross-section to the inside (e.g., toward the curved central axis 1002), and this cross-flow reduces the magnitude of the adverse pressure gradient along the flow direction, thereby reducing and / or preventing boundary layer separation and related effects on valve flow performance. To further improve fluid flow efficiency, at least some portions of the fluid channel 206 (e.g., the changing flow path portion 300) can include a textured finish (e.g., a rough surface, grooves, etc.).

[0044] Fig.11is a cross-sectional perspective view of the valve body 200. The bean-shaped cross-sectional shape of the variable flow path portion 300 provides improved flow efficiency by inducing cross-flow, reduces the severity of flow separation, reduces dead flow areas, and / or allows smoother flow diversion between the inlet 202 and the inlet 202. For example, the gradual curve or profile 300a provided by the variable flow path portion 300 (e.g., bean-shaped shape) provides a smoother flow transition. In addition to reducing or preventing boundary layer separation and / or providing a smoother flow diversion, the variable fluid flow path 300 also allows for a reduced transition or diversion from horizontal flow (e.g., inlet 202) to vertical flow (e.g., orifice 216) to allow for a shorter face-to-face transition. The bean-shaped shape provides a higher flow efficiency (Cv) than a valve having the same or similar face-to-face transition and implemented without the bean-shaped fluid channel 206. In some examples, a valve configured to provide the same or equivalent flow efficiency (Cv) as the valve 100 has a longer face-to-face transition than the valve 100. Thus, the valve 100 can be implemented with a shorter face-to-face transition while providing the same or equivalent flow efficiency (Cv) as compared to a valve implemented without the bean-shaped shape. For example, a valve body (e.g., valve body 200) implemented with the fluid passage 206 disclosed herein having a six-inch diameter (e.g., a six-inch valve with a 1500-grade butt weld joint (BWE)) can have a face-to-face length of between approximately 20 inches and 30 inches and can provide a flow coefficient (Cv) value of between approximately 420 and 550. For example, according to the ANSI / ISA-75.08.05-2002 standard, a six-inch valve implemented with a short face-to-face transition specifies a 24-inch length face-to-face transition with a tolerance of 0.062 inches, and a six-inch valve implemented with a long face-to-face transition specifies a 30.25-inch length face-to-face transition with a tolerance of 0.062 inches. Thus, in some examples, the face-to-face transition of a six-inch valve implemented with the fluid passages 206 disclosed herein may be approximately 6 inches to 8 inches smaller than a six-inch valve implemented without the fluid passages 206 disclosed herein.

[0045] In addition, if the above is combined Figure 8 and Fig. 9 As described above, the bean-like shape of the variable flow path portion 300 increases or improves the structural strength or support of the web 902. The web 1100 protrudes (e.g., depends) from the inner wall 302 and has a thickness 902 sufficient to resist pressure, gasket forces, and / or sealing forces (e.g., applied by the actuator 104 when the actuator 104 moves the valve plug 214 against the valve seat 212 to prevent fluid from flowing between the inlet 202 and the outlet 204). As a result, a portion 1102 of the web 902 (e.g., defined by the upper surface 416) provides increased structural strength.

[0046] At least some of the above examples include one or more features and / or advantages including, but not limited to, the following:

[0047] In some examples, a fluid valve includes a body defining a fluid passage between an inlet and an outlet, wherein at least a portion of the fluid passage between the inlet and the outlet has a generally non-circular cross-sectional shape when cut along a plane transverse to a direction of fluid flow, the cross-sectional shape including a curved central axis, the generally non-circular cross-sectional shape having an outwardly curved end wall and a curved side wall connecting the curved end wall.

[0048] In some examples, a radius of curvature of one of the curved sidewalls is significantly greater than a radius of curvature of another of the curved sidewalls.

[0049] In some examples, the generally non-circular cross-sectional shape has a bean-like shape.

[0050] In some examples, the outwardly curved end walls each have a portion that is offset relative to the curved side walls.

[0051] In some examples, the fluid flow area defined by the substantially non-circular cross-sectional shape is substantially similar to the fluid flow area defined by the substantially circular cross-sectional shape of at least one of the inlet or the outlet.

[0052] In some examples, the body defines an inlet, an outlet, and a fluid passage fluidly coupling the inlet and the outlet, and when taken along a plane transverse to the direction of fluid flow through at least a portion of the fluid passage, at least a portion of the fluid passage between the inlet and the outlet has a cross-section that is generally bean-shaped.

[0053] In some examples, the inlet has a circular cross-sectional shape.

[0054] In some examples, the outlet has a circular cross-sectional shape.

[0055] In some examples, at least a portion of the fluid channel is located between an orifice and an outlet of the fluid channel.

[0056] In some examples, at least a portion of the fluid channel is located between the orifice and the inlet of the fluid channel.

[0057] In some examples, at least a portion of the fluid channel includes a first segment, a second segment, and a third segment, the second segment is positioned between the first segment and the third segment, and wherein the first segment, the second segment, and the third segment define a length of at least a portion of the fluid channel, the first segment has a cross-section that is generally circular in shape, the second segment has a cross-section that is generally bean-shaped in shape, and the third segment has a cross-section that is generally circular in shape.

[0058] In some examples, at least a portion of the fluid channel transitions from a generally circular-shaped cross-section to a generally bean-shaped cross-section and to a generally circular-shaped cross-section in the direction of fluid flow.

[0059] In some examples, at least a portion of the fluid channel defines a varying fluid flow profile in the direction of the fluid flow, wherein the varying fluid flow profile varies from a generally circular shaped cross-section to a generally elliptical cross-section to a generally bean-shaped cross-section to a generally elliptical cross-section and to a generally circular cross-section across the length of at least a portion of the fluid channel.

[0060] An exemplary fluid valve includes a body defining an inlet, an outlet, and a fluid passage fluidly connecting the inlet and the outlet, at least a portion of the fluid passage between the inlet and the outlet having a generally bean-shaped cross-section when cut along a plane transverse to a direction of fluid flow through at least a portion of the fluid passage.

[0061] In some examples, at least a portion of the fluid channel includes a third segment having a generally circular shape, the second segment being positioned between the first segment and the third segment.

[0062] In some examples, at least a portion of the fluid channel includes a fourth segment having a generally elliptical shape, the fourth segment being positioned between the first segment and the second segment.

[0063] In some examples, at least a portion of the fluid channel includes a fifth segment having a generally elliptical shape, the fifth segment being positioned between the second segment and the third segment.

[0064] In some examples, the first segment defines at least one of an inlet or an outlet, and the third segment defines an orifice of the fluid passage.

[0065] In some examples, at least a portion of the fluid passageway is located between an orifice defined by the body and at least one of the inlet or the outlet.

[0066] Although certain exemplary methods, apparatus, and articles of manufacture have been disclosed herein, the scope of coverage of this patent is not limited thereto. On the contrary, this patent covers all methods, apparatus, and articles of manufacture that fairly fall within the scope of the claims of this patent.

Claims

1. A fluid valve, comprising: a body defining a fluid passage between an inlet and an outlet, at least a portion of the fluid passage between the inlet and the outlet having a generally non-circular cross-sectional shape when taken along a plane transverse to a direction of fluid flow, wherein the generally non-circular cross-sectional shape includes a curved central axis, the generally non-circular cross-sectional shape having outwardly curved end walls and curved side walls connecting the curved end walls, a valve core assembly disposed within the fluid passage to control fluid flow through an orifice of the fluid passage, The body has an inner wall defining at least a portion of the fluid passage, the inner wall comprising: a side that tapers outwardly between a first section of the fluid passage and a portion of a second section of the fluid passage, and tapers inwardly between the portion of the second section and a third section of the fluid passage, the second section being between the first section and the third section, wherein the first section, the second section, and the third section are all between the inlet and the orifice or between the orifice and the outlet; and An upper surface of the portion of the inner wall defining the second section protrudes into the fluid passage between the sides of the inner wall. 2 . The fluid valve of claim 1 , wherein a radius of curvature of one of the curved sidewalls is substantially greater than a radius of curvature of another of the curved sidewalls. 3 . The fluid valve of claim 1 , wherein the generally non-circular cross-sectional shape has a bean-like shape.

4. The fluid valve of claim 1, wherein the outwardly curved end walls each have a portion that is offset relative to the curved side walls.

5. The fluid valve of claim 1, wherein a fluid flow area defined by the generally non-circular cross-sectional shape is substantially equal to a fluid flow area defined by a generally circular cross-sectional shape of at least one of the inlet or the outlet.

6. A fluid valve, comprising: A body defining an inlet, an outlet, and a fluid passage fluidly coupling the inlet and the outlet, the at least a portion of the fluid passage between the inlet and the outlet having a cross-section that changes transversely to a direction of fluid flow through at least a portion of the fluid passage, the at least a portion of the fluid passage transitioning from a generally circular cross-sectional shape to a generally elliptical cross-sectional shape to a generally bean-shaped cross-sectional shape to a generally elliptical cross-sectional shape, and to a generally circular cross-sectional shape over a length across the at least a portion of the fluid passage in the direction of fluid flow.

7. The fluid valve of claim 6, wherein the inlet has a circular cross-sectional shape.

8. The fluid valve of claim 6, wherein the outlet has a circular cross-sectional shape.

9. The fluid valve of claim 6, wherein the at least a portion of the fluid passage is located between an orifice of the fluid passage and the outlet.

10. The fluid valve of claim 6, wherein the at least a portion of the fluid passage is located between an orifice of the fluid passage and the inlet.

11. A fluid valve according to claim 6, wherein the at least portion of the fluid channel includes a first segment, a second segment and a third segment, the second segment is positioned between the first segment and the third segment, and wherein the first segment, the second segment and the third segment define the length of the at least portion of the fluid channel, the first segment has a cross-section of the generally circular shape, the second segment has a cross-section of the generally bean-shaped shape, and the third segment has a cross-section of the generally circular shape.

12. A fluid valve, comprising: a body defining a fluid passage between the inlet and the outlet, at least a portion of the fluid passage defining a cross-sectional shape that varies in a direction of fluid flow, at least a portion of the cross-sectional shape of the fluid passage comprising: a first section having a generally circular shape; a second section having a generally bean-like shape; and The third section has a generally elliptical shape.

13. The fluid valve of claim 12, wherein the third section is positioned between the first section and the second section.

14. The fluid valve of claim 13, wherein the at least a portion of the fluid passageway includes a fourth segment having a generally circular shape, the second segment being positioned between the first segment and the fourth segment. 15 . The fluid valve of claim 14 , wherein the at least a portion of the fluid passageway includes a fifth segment having a generally elliptical shape, the fifth segment being positioned between the second segment and the fourth segment.

16. The fluid valve of claim 15, wherein the first section defines at least one of the inlet or the outlet and the fourth section defines an orifice of the fluid passage.

17. The fluid valve of claim 12, wherein the at least a portion of the fluid passageway is located between an orifice defined by the body and at least one of the inlet or the outlet.

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