Adjustable cage assembly for flow control device

Abstract

An adjustable cage assembly for a flow control device may include a first cage and a second cage or a plurality of inserts. The second cage may be rotated relative to the first cage, or one or more of the inserts may be selectively fixed to the first cage to provide different radial flow patterns through the adjustable cage assembly.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Patent Application No. 17 / 410,805 filed on August 24, 2021 and U.S. Provisional Patent Application No. 63 / 352,307 filed on June 15, 2022, the entire contents of which are incorporated herein by reference. Background Art

[0003] Flow control devices can be used in a variety of industrial, commercial and other environments, including regulating the flow rate or pressure of a fluid flowing from a fluid source. In some applications, it can be used to manage the flow rate or pressure or other characteristics of a fluid flowing from a pressure source to a downstream application or device. Summary of the invention

[0004] Some examples of the disclosed technology provide a confinement cage configured to regulate flow through a flow control device. Some examples of the disclosed technology provide a noise reduction cage configured to regulate the acoustic response of flow through a flow control device.

[0005] Some examples of the disclosed technology provide an adjustable cage assembly for a flow control device. The adjustable cage assembly may include a first cage and a second cage. Each of the first cage and the second cage includes a first wall segment having an inner surface and an outer surface, a first locking feature formed on the inner surface of the first wall segment, a second wall segment having an inner surface and an outer surface, and a second locking feature formed on the outer surface of the second wall segment. The first wall segment and the second wall segment may be spaced apart along a circumferential direction to form a first opening between the first wall segment and the second wall segment. The first locking feature of the first cage may be configured to engage the second locking feature of the second cage to rotatably fix the first cage relative to the second cage at one of a plurality of alignment portions to at least partially align the first opening of the first cage at one of a plurality of alignment portions so as to at least partially align the first opening of the first cage with the first opening of the second cage, thereby forming a corresponding plurality of opening profiles for flow across the first cage and the second cage.

[0006] In some examples, an adjustable cage assembly can include a first locking feature and a second locking feature. The first locking feature or the second locking feature can include an array of locking members.

[0007] In some examples, an adjustable cage assembly can include locking members in an array of locking members configured as ribs extending axially relative to a corresponding first cage body or a second cage body.

[0008] In some examples, an adjustable cage assembly may include a locking member array. The locking member array may include a plurality of ribs and a plurality of slots between the plurality of ribs. One of the plurality of slots or the plurality of ribs may correspond to a plurality of alignment portions.

[0009] In some examples, an adjustable cage assembly may include a first cage body and a second cage body. Each cage body may include a continuous annular base. A first wall segment and a second wall segment may extend axially from the annular base.

[0010] In some examples, an adjustable cage assembly may include a first cage body and a second cage body. The first cage body and the second cage body may include a third wall segment and a fourth wall segment extending axially from an annular base and respectively opposite to the first wall segment and the second wall segment.

[0011] In some examples, an adjustable cage assembly can include an inner surface of a first wall segment of a first cage body that faces an outer surface of a second wall segment of a second cage body at each of a plurality of alignments.

[0012] In some examples, an adjustable cage assembly can include a first opening that is symmetrical about an axis and configured to form a linear variable flow opening.

[0013] In some examples, an adjustable cage assembly can include a cage body defining a central axis. The cage body can also include a first wall segment that is radially farther from the central axis than a second wall segment.

[0014] In some examples, an adjustable cage assembly can include an opening profile. The opening profile corresponding to a first opening of a first cage body is completely radially aligned with the first opening of a second cage body, which provides a least restricted position for the adjustable cage assembly. The opening profile corresponding to a first wall segment of the first cage body extends maximally circumferentially across the first opening of the second cage body, which provides a most restricted position for the adjustable cage assembly. Additional opening profiles provide additional positions between the least restricted position and the most restricted position.

[0015] In some examples, an adjustable cage assembly may include a first cage body and a second cage body that are substantially identical to one another.

[0016] Some examples of the disclosed technology provide a confinement cage for a flow control device. The confinement cage may include a first annular member and a second annular member. The second annular member may be configured to be rotatably fixed relative to the first annular member at a plurality of alignments to provide flow openings having a corresponding plurality of sizes to provide adjustable control of a fluid flow rate through the confinement cage.

[0017] In some examples, a confinement cage may include a first annular member having a first circumferential wall and a first cutout formed in the first circumferential wall.

[0018] In some examples, a confinement cage may include a second annular member having a second circumferential wall configured to axially overlap the first circumferential wall. Rotating the second annular member relative to the first annular member may adjust the amount of overlap between the first circumferential wall and the second circumferential wall.

[0019] In some examples, a confinement cage may include a second annular member having a second circumferential wall and a second cutout formed in the second circumferential wall.Alignment of the first cutout with the second cutout may define a current size of the flow opening.

[0020] In some examples, a restraining cage may include a first annular member. The first annular member may include an array of first locking members, and a second annular member may include a second locking member. The second locking member may be configured to engage the array of first locking members to secure the first annular member and the second annular member at a plurality of alignment portions.

[0021] In some examples, a restraining cage can include a plurality of first locking members configured as one of a recess or a protrusion. A second locking member can be configured as the other of a recess or a protrusion.

[0022] In some examples, a confinement cage may include a first annular member that is substantially identical to a second annular member.

[0023] Some examples of the disclosed technology provide a method for adjusting an effective flow area in a flow control device. The method may include: rotating a first cage having a first opening relative to a second cage having a second opening to align the first opening with the second opening at any selected alignment of a plurality of alignments to define an effective flow area; rotatably fixing the first cage relative to the second cage at the any selected alignment of the plurality of alignments; and installing the first cage and the second cage in the flow control device at the flow control opening.

[0024] In some examples, a method of adjusting an effective flow area in a flow control device may include: starting from a reference orientation, rotating a first cage relative to a second cage in a first direction to increase the effective flow area; and rotating the first cage relative to the second cage in a direction opposite to the first direction to decrease the effective flow area.

[0025] In some examples, a method of adjusting an effective flow area in a flow control device may include rotating a first cage relative to a second cage for a rotation angle within a first rotation range to linearly increase or decrease the effective flow area in relation to the rotation angle.

[0026] Some examples of the disclosed technology provide an adjustable cage assembly for a flow control device. A first cage body may have an inner surface and an outer surface and a first opening extending from the inner surface to the outer surface to provide a first body radial flow area through the first cage body. A second cage body may have an inner surface and an outer surface and a second opening extending from the inner surface to the outer surface to provide a second body radial flow area through the second cage body. The adjustable cage assembly may have a first configuration and a second configuration. In the first configuration, one or more of the first or second cage bodies define an annular assembly, wherein one or more of the corresponding first openings or second openings of the one or more cage bodies in the first or second cage bodies provide a first cage assembly radial flow area through the one or more cage bodies in the first cage body or the second cage body. In the second configuration, the first cage body and the second cage body together define an annular assembly, wherein the first opening is aligned relative to the second opening, which provides a second cage assembly radial flow area through the first cage body and the second cage body, and the second cage assembly radial flow area is smaller than the first cage assembly radial flow area.

[0027] In some examples, the first cage can be a first annular cage and the second cage can be a second annular cage sized to nest concentrically with the first annular cage. The first annular cage and the second annular cage can together define an annular assembly in a first configuration, and the first annular cage and the second annular cage can be differently rotationally aligned relative to each other in the first configuration as compared to the second configuration.

[0028] In some examples, the first annular cage and the second annular cage may be capable of selectively locking in one or more (e.g., multiple) configurations. In some examples, the first annular cage and the second annular cage jointly include a detent device to selectively lock the first annular cage and the second annular cage in the first configuration and the second configuration. In some examples, the first openings may be arranged along the first periphery of the first annular cage with a circumferential spacing between adjacent groups of first openings, and the second openings may be arranged along the second periphery of the second annular cage with a circumferential spacing between adjacent groups of second openings, the circumferential spacing of the second openings being the same as the circumferential spacing of the first openings, and the detent device may include a first detent and a second detent, the first detent and the second detent being spaced apart by a circumferential spacing that is greater than the circumferential spacing of the first opening and the second opening.

[0029] In some examples, the first annular cage and the second annular cage are selectively lockable in a plurality of configurations, the plurality of configurations including a first configuration, a second configuration, and a third configuration, wherein the first annular cage and the second annular cage together define an annular assembly, wherein the first opening is aligned relative to the second opening, which provides a third cage assembly radial flow area through the first annular cage and the second annular cage, the third cage assembly radial flow area being less than each of the first cage assembly radial flow area of ​​the first configuration and the second cage assembly radial flow area of ​​the second configuration.

[0030] In some examples, the first cage can be a first annular cage including a first insert recess. The second cage can be a removable insert that is received in the first insert recess when the adjustable cage assembly is in one operating configuration and is not received in the first insert recess when the adjustable cage assembly is in another operating configuration.

[0031] In some examples, an adjustable cage assembly may include a plurality of removable inserts. Each of the plurality of removable inserts may be sized to be selectively (e.g., and separately) received in an insert recess of an annular cage and may provide a corresponding cage assembly radial flow area of ​​a plurality of different cage assembly radial flow areas that are common through a first opening of a first annular cage and an opening of a removable insert when received in the insert recess (e.g., the inserts may collectively provide a different cage assembly radial flow area that is common through a first opening of a first annular cage and an opening of a removable insert, depending on which removable insert is received in the insert recess). In some examples, a first removable insert may include a first pattern of flow openings, and a second removable insert may include a second pattern of flow openings that is different from the first pattern. In some examples, a first annular cage may include a plurality of insert recesses configured to selectively receive different arrangements of the plurality of inserts to define a corresponding plurality of cage assembly radial flow areas through the adjustable cage assembly.

[0032] In some examples, the first insert recess may include a dovetail profile sized to receive a complementary dovetail profile of the first insert recess.

[0033] In some examples, an adjustable cage assembly can be configured to direct flow through a flow control device in a radial flow direction relative to the adjustable cage assembly. In some examples, a first insert recess can be disposed on one of an inner surface and an outer surface of the first annular cage body that is located upstream relative to the radial flow direction.

[0034] Some examples provide a flow control device having an annular cage and a plurality of removable inserts. The annular cage may have: an inner surface; an outer surface; a first opening extending from the inner surface to the outer surface to provide a first body radial flow area through the first cage; and a first insert recess, the first insert recess being arranged circumferentially around the annular cage. Each of the plurality of removable inserts may have an inner surface and an outer surface and an insert opening extending from the inner surface to the outer surface. The size of each of the plurality of removable inserts may be designed to be selectively received in the first insert recess to provide a corresponding radial flow area defined by an overlapping pattern between the first opening and the insert opening. The adjustable cage assembly may have a first radial flow area corresponding to the overlapping pattern provided by a first insert of the removable inserts and a different second radial flow area corresponding to the overlapping pattern provided by a second insert of the removable inserts.

[0035] In some examples, the insert opening of the first removable insert may include an opening having a diameter greater than a diameter of the first opening through the annular cage. In some examples, the removable insert may not include an insert opening extending from an inner surface to an outer surface of the removable insert.

[0036] In some examples, the annular cage may include a seat end and a flow end, the seat end being configured to be oriented closer to the seat of the flow control device.The first insert recess may include a shelf at the seat end of the annular cage to secure the removable insert within the first insert recess.

[0037] In some examples, the first insert recess can include a dovetail edge sized to engage a corresponding dovetail edge of the one or more removable inserts.

[0038] In some examples, the annular cage can include a plurality of insert recesses (including, for example, a first insert recess) arranged circumferentially about the annular cage and sized to selectively receive different arrangements of a plurality of removable inserts to define a plurality of different total radial flow areas for the adjustable cage assembly.

[0039] Some examples may provide a method of adjusting an effective flow area in a flow control device. A first insert may be selected from a plurality of removable inserts, each of the plurality of removable inserts having an insert flow opening arranged to provide a corresponding flow area for flow through the removable insert (e.g., each of the plurality of inserts having a different pattern of radial flow openings). A first insert (e.g., a dovetail insert) may be inserted (e.g., axially inserted) into a first insert recess (e.g., one of a plurality of dovetail or other recesses located on an upstream cage surface) of an annular cage to form a first configuration of an adjustable cage assembly, wherein at the first insert recess, there is a first overlap pattern between the insert flow opening of the first insert and the flow opening of the annular cage, the first overlap pattern defining a first radial flow area for flow through the first configuration of the adjustable cage assembly. The first insert may be removed from the first insert recess. A second removable insert may be selected from the plurality of removable inserts, the second removable insert having a different arrangement of insert flow openings than the first removable insert. The second insert may be inserted into the first insert recess to form a second configuration of the adjustable cage assembly, wherein at the first insert recess there is a second overlap pattern between the insert opening of the second insert and the flow opening of the annular cage, the second overlap pattern defining a second radial flow area for flow through the second configuration of the adjustable cage assembly, the second radial flow area being different from the first radial flow area. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate examples of the disclosed technology and, together with the description, serve to explain the principles of examples of the disclosed technology:

[0041] Figure 1 is a partial cross-sectional view of a flow control device including a confinement cage.

[0042] Figure 2 is an exploded isometric view of an adjustable cage assembly according to an example of the disclosed technology.

[0043] Figure 3 yes Figure 2 An isometric view of one cage body of an adjustable cage assembly.

[0044] Figure 4A is in the fully open position Figure 2 An isometric view of the adjustable cage assembly.

[0045] Figure 4B is in a partially open position Figure 2 An isometric view of the adjustable cage assembly.

[0046] Figure 4C is in a partially closed position Figure 2 An isometric view of the adjustable cage assembly.

[0047] Figure 5 It is taken along line 5-5 Figure 4B Cross-sectional isometric view of the .

[0048] Fig. 6A is a schematic diagram of a cage profile according to an example of the disclosed technology.

[0049] Figure 6B Is Fig. 6A Schematic diagram of the flow opening formed by the cage contour.

[0050] Figure 6C Is Fig. 6A Schematic diagram of another flow opening formed by the cage contour.

[0051] Fig. 7A is a schematic diagram of a cage profile according to an example of the disclosed technology.

[0052] Figure 7B Is Fig. 7A Schematic diagram of the flow opening formed by the cage contour.

[0053] Figure 7C Is Fig. 7A Schematic diagram of another flow opening formed by the cage contour.

[0054] Fig. 8A is a schematic diagram of a cage profile according to an example of the disclosed technology.

[0055] Figure 8B Is Fig. 8A Schematic diagram of the flow opening formed by the cage contour.

[0056] Figure 8C Is Fig. 8A Schematic diagram of another flow opening formed by the cage contour.

[0057] Fig. 9 is an isometric view of an annular cage of an adjustable cage assembly according to an example of the disclosed technology.

[0058] Fig. 10A and Fig. 10B is an example of the disclosed technology and Fig. 9 Simplified elevation view of a removable insert for use with a cage.

[0059] Fig.11 Is in the ring cage assembly Fig. 9Isometric view of a cage of FIG. 1 , wherein a plurality of inserts provide different corresponding local radial flow configurations.

[0060] Fig.12 and Fig.13 With removable insert and Fig. 9 A top partial plan view and a partial isometric view of an annular flow assembly of a cage.

[0061] Fig.14 An isometric view and a partially enlarged isometric view of another adjustable cage assembly according to an example of the disclosed technology are shown.

[0062] Figures 15A-15C The cross section corresponding to the different radial flow areas of the associated flow control device is shown. Fig.14 Different exemplary alignments of openings in the first cage body and the second cage body of the cage assembly. DETAILED DESCRIPTION

[0063] The following discussion is proposed to enable those skilled in the art to make and use each example of the disclosed technology. Various modifications to the illustrated examples will be apparent to those skilled in the art, and the general principles of this article can be applied to other examples and applications without departing from the disclosed technology. Therefore, the examples of the disclosed technology are not intended to be limited to the illustrated examples, but should conform to the widest scope consistent with the principles and features disclosed herein. The following detailed description will be read with reference to the accompanying drawings, in which similar elements in different drawings have similar reference numerals. The accompanying drawings are not necessarily drawn to scale, and they depict selected examples and are not intended to limit the scope of the examples of the disclosed technology. The technician will recognize that each example provided herein has many useful alternatives and falls within the scope of the disclosed technology.

[0064] Before explaining any examples of the disclosed technology in detail, it should be understood that the disclosed technology is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or shown in the accompanying drawings. The disclosed technology can have other examples and can be practiced or executed in various ways. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be considered as limiting. For example, the use of "comprising", "including" or "having" and variations thereof herein is meant to cover the items listed thereafter and their equivalents and additional items.

[0065] As briefly discussed above, flow control devices can be used to reduce the flow rate or pressure of a fluid flowing from a fluid source to a downstream application. Certain systems and containers require protection to avoid overpressure. For example, flow control devices such as regulators and pressure relief valves can be used in such systems to reduce or release excessive fluid pressure. In general, a flow control device can include an inlet, an outlet, and a flow control assembly. The flow control assembly can include a primary control member (e.g., a disk or other plug) and a secondary control member to further limit the flow through the flow control device.

[0066] In some flow control devices including regulators, a curtain area can be formed between the valve seat and the primary control member. Generally speaking, the curtain area is the flow window created by an open valve at maximum lift and is a function of the orifice circumference and valve stroke. In some cases, a secondary control member can be placed within the curtain area to further restrict flow through the regulator (or other device). The flow restriction provided by the secondary control member can help reduce the flow through the regulator while avoiding damage to the seat (e.g., when certain secondary control members are installed in the regulator, the flow is not destructively directed into the seat at high pressure drops). In some examples, the secondary control member can be specifically configured to provide flow with improved pressure characteristics as part of a noise reduction cage assembly (e.g., reduce the decibel level of valve operation under otherwise equivalent flow conditions, or otherwise improve sound performance).

[0067] Examples of the disclosed technology can provide an adjustable secondary control member that can accommodate any of a range of desired flow restrictions through a flow control device without replacing the entire flow control device, which would otherwise result in a significant increase in cost and system complexity. For example, some configurations of the disclosed technology provide a restriction cage that can be adjusted to change the profile of one or more intermediate openings of the cage so that a desired flow rate through the cage can be provided via the one or more intermediate openings. In general, in this regard, an adjustable cage assembly according to various examples of the disclosed technology can include a first cage body and a second cage body, the first cage body and the second cage body configured to be rotatably fixed to each other at a plurality of alignments to provide a flow opening of variable size so as to adjustably control the flow rate of a fluid through the cage assembly, and thereby adjustably control the flow rate of a fluid through the flow control device. Such adjustability can provide a relatively high resolution (e.g., small adjustment intervals) of a variable flow rate for the flow control device without requiring excessive or invasive modifications to the flow control device.

[0068] In some examples, a restraining cage can include a first cage body and a second cage body that are substantially identical (i.e., cage bodies that are produced based on the same specifications or geometric structures and using the same manufacturing process and equipment), and the first cage body and the second cage body can be assembled together into an adjustable assembly. Each cage body can, for example, include two pairs of legs. When assembling the restraining cage, one pair of the legs can be disposed at the outer diameter of the cage, and the other pair of legs can be disposed at the inner diameter of the cage. Thus, for example, the substantially identical cage bodies can be oriented relative to each other and assembled to form a complete adjustable assembly.

[0069] In some examples, the outer diameter leg or other feature on the first cage body can include a locking member, such as, for example, a protruding lug or rib, which is configured to interlock with a gap (e.g., a recess) on the inner diameter leg or other feature on the second cage body. In some cases, such a gap can be included in a plurality of gaps (e.g., a plurality of spaced-apart recesses) corresponding to a plurality of adjustable positions of the adjustable cage. Likewise, in some examples, the outer diameter leg can include one or more gaps and the inner diameter leg can include a locking member, such as, for example, a protruding lug or rib.

[0070] In some examples, an adjustable restraining cage may include a first cage and a second cage that can be rotationally fixed. In some cases, when the first cage is rotationally locked relative to the second cage, the first cage can still be axially movable (e.g., slidable) relative to the second cage. In some examples, relative axial movement of the first cage and the second cage can be prevented via a coupling (e.g., mechanical or magnetic) between the first cage and the second cage. For example, the first cage and the second cage can be fixed via a roll pin, a set screw, a retaining clip, etc. In some examples, the first cage and the second cage can be axially fixed via a tapered lug or other tapered feature so that when the first cage and the second cage are slid into axial alignment, interference is formed between the first cage and the second cage. For example, the locking member can have a tapered end portion that allows one cage to slide axially relative to the other cage in one direction to a locked position. Once in the locked position, the one cage can be prevented from moving in an opposite second direction to axially fix the cage.

[0071] Additionally, in some examples, the windows (e.g., openings) of the adjustable restrictive cage can be configured to receive panels therein to provide additional flow restriction through the adjustable window cage. For example, a whisper panel (e.g., a mesh panel having an array of apertures) can be inserted into or radially aligned with one or more of the windows of the adjustable window cage to further restrict flow to a desired flow rate.

[0072] In some examples, an adjustable cage can be configured as such an adjustable cage that can provide an adjustable total flow area via adjustable alignment of radial passages through an annular cage assembly. In some cases, the adjustable cage can thus be adjustable to provide lower operating decibel levels for a given set of flow characteristics, improved pressure behavior and other flow dynamics (e.g., can help ensure that full commanded lift of a particular valve element is executed), and adaptability to changes in the overall level of process flow over time (e.g., changes in average or expected downstream demand due to field improvements).

[0073] Reference now Figure 1 , an exemplary flow control device 100 is shown. The flow control device 100 is configured as a pressure reducing regulator. The flow control device 100 includes an inlet 102, an outlet 104, and a control assembly 106. The control assembly 106 includes a disc retainer assembly 108 and a control member 110. In the example shown, the control member 110 is configured as a secondary control member that surrounds a seat 112 of the flow control device 100 so that the control member 110 is positioned in the flow path between the inlet 102 and the outlet 104 and immediately downstream of the seat 112. In general, the control member 110 can be configured as an adjustable restriction cage according to various examples of the disclosed technology. Specific examples of the construction of the adjustable restriction cage will be described in detail below, including reference Figure 2 -8. In general, however, a control member configured as an adjustable restriction cage can be manually adjusted (e.g., prior to installation) to provide a selected profile to one or more restriction openings (e.g., windows through the cage) for flow through the cage and the overall flow control device 100. In this manner, for example, an installer or operator can tailor the restriction behavior of the control member as desired for a particular application.

[0074] In some examples, control components according to the disclosed technology can provide generally improved performance for flow control devices (e.g., regulators), particularly at lower valve lifts, and provide increased adaptability. For example, in some conventional designs, a restricted trim plate can be used to reduce flow through a flow control device or increase pressure drop through a flow control device, including, for example, Figure 1 Although the restricted orifice 114a of the plate 114 may provide a reduced flow and increased pressure drop, the fluid dynamics downstream of the orifice 114a may result in a reduced pressure region upstream of the curtain region 116 (e.g., Figure 1114 ). The force imbalance caused by this reduced pressure region may sometimes result in suboptimal performance of the device 100. However, in some examples, the arrangement of the control member 110 as shown (e.g., as an adjustable restraining cage located at or downstream of the curtain region 116) can allow the plate 114 to be removed prior to operation or omitted entirely.

[0075] Although Figure 1 The control member 110 configured as an adjustable restriction cage is shown installed in the flow control device 100 (i.e., configured as a regulator), but it should be understood that the adjustable restriction cage or other control members according to various examples of the disclosed technology can be installed in other flow control devices, including in other regulators and in different types of valves, such as pressure relief valves. For example, as also discussed below, some examples can be configured as an adjustable noise reduction cage.

[0076] Figure 2 A control member configured as a restriction cage 120 according to an example of the disclosed technology is shown. In general, the restriction cage 120 can be installed in various flow control devices, including flow control devices having a similar configuration to the control member 110 in the flow control device 100. In particular, the restriction cage 120 is configured as an adjustable cage assembly having first and second cage bodies 122. In the example shown, the first and second cage bodies 122 are substantially identical to each other, which can facilitate simplified manufacturing and ease of use. However, other configurations are also possible.

[0077] like Figure 2 As shown, each of the cage bodies 122 includes a circumferential wall 126. In addition, as shown, each of the circumferential walls 126 includes a plurality of wall segments. In particular, in the example shown, the circumferential wall 126 includes two pairs of wall segments 128, 130, each wall segment being circumferentially separated from an adjacent wall segment 130, 128 by an opening 132. In addition, all of the wall segments 128, 130 have the same circumferential length and axial height and are regularly spaced around the circumferential wall 126. In other examples, the circumferential wall of the first cage body may include more or fewer or other different wall segments and corresponding openings than the restraining cage 120.

[0078] refer to Figure 3, one of the cages 122 is shown alone. As briefly described above, the cage 122 includes a first pair of wall segments 128 and a second pair of wall segments 130. The wall segments 128, 130 are circumferentially spaced about a central axis 134 of the cage 122. Generally speaking, the cage 122 is configured as an annular member and includes a continuous annular base 136. Each of the wall segments 128, 130 extends axially from the annular base 136. In the example shown, the wall segments 128, 130 are alternately spaced such that the first pair of wall segments 128 are opposite to each other and the second pair of wall segments 130 are opposite to each other. In addition, the wall segments 128 are substantially radially farther from the axis 134 than the wall segments 130, as will be discussed further below.

[0079] Each of the first wall segments 128 includes an inner surface 140 and an outer surface opposite the inner surface 140. The inner surface 140 faces the central axis 134, and the outer surface faces away from the central axis 134. In addition, the inner surface 140 includes a first locking feature 144. In the example shown, the first locking feature 144 is a locking member configured as a rib extending axially along the first wall segment 128. In other examples, the first locking feature of the cage can be configured as one or more other protrusions or one or more recesses extending completely or partially along the wall segment, or can be configured as a stopper with a different configuration, which is configured to engage a corresponding locking feature on the other cage to rotatably fix the two cages.

[0080] Each of the second wall segments 130 includes an outer surface 152 and an inner surface opposite the outer surface 152. The inner surface faces the central axis 134 and the outer surface 152 faces away from the central axis 134. The outer surface 152 includes a second locking feature 154. In the example shown, the second locking feature 154 includes an array of locking members configured as a series of grooves 158 and a plurality of ribs 156 extending axially along the second wall segment 130. In other examples, the second locking feature of the cage can be configured as one or more other protrusions or recesses that extend completely or partially along the wall segment to engage a corresponding locking feature on another cage body so as to rotatably fix the two cage bodies, or the second locking feature of the cage can be configured as a feature with a different configuration that is configured to engage a corresponding stop (or other first locking feature).

[0081] As briefly described above, the cage 122 also includes openings 132 that are circumferentially spaced about the central axis 134 and formed in the circumferential wall 126. Generally speaking, each of the openings 132 is configured as a cutout (e.g., a three-sided cutout as shown) in the circumferential wall 126, which is defined by the first pair of wall segments 128 and the second pair of wall segments 130 and the annular base 136. In the example shown, each opening 132 has a generally similar width (i.e., the circumferential arc length between the wall segments 128, 130). However, in other examples, the cage may include openings having different widths within the circumferential wall.

[0082] Reference now Figures 4A-4C The first and second cage bodies 122 of the restraining cage 120 may be oriented in an axially opposed configuration and then rotatably fixed relative to each other at a plurality of alignments to provide the intermediate opening 162 with any selected one of a plurality of profiles. For example, Figure 4A The restraining cage 120 is shown in a fully open position. In the fully open position, each opening 132 of the cage 122 is fully radially aligned (i.e., positioned to maximally overlap along a common radial direction relative to the flow axis) such that neither the first pair of wall segments 128 nor the second pair of wall segments 130 overlaps any opening 132 of the cage 122. Conversely, with the restraining cage 120 in a fully closed position (not shown), both pairs of wall segments 128, 130 may fully overlap the openings 132 to prevent flow through the restraining cage 120 via the openings 132. For example, when used with a flow control device, Figure 4A The fully open position of the restraining cage 120 shown may correspond to a maximum volumetric flow rate permitted through the central opening 162 of the restraining cage 120 .

[0083] In the example shown, in order to reduce the flow rate through the restriction cage 120, one of the cages 122 can be rotated relative to the other cage 122. For example, Figures 4A-4C The top restraining cage 122 shown can be rotated in the direction indicated by the arrow to reduce the size of the profile at the intermediate opening 162. Figure 4B As shown, the restraining cage 120 is in a partially open position. When used with a flow control device, Figure 4A Compared to the alignment of the confinement cage in Figure 4B The partially open position shown in may correspond to a reduced volumetric flow rate permitted through the confinement cage 120 .

[0084] To further reduce the flow rate through the restriction cage 120, one of the cage bodies 122 may be rotated (e.g., in the direction indicated by the arrow). Figures 4A-4C The top cage 122 in the middle is provided to further reduce the size of the middle opening 162. Figure 4CAs shown, the restraining cage 120 is in another partially open position. In some examples, Figure 4C The partially open position shown in may correspond to the minimum rated capacity flow rate allowed through the confinement cage. Figure 4C In the alignment of the cage bodies 122 shown in , the first locking feature 144 can engage with the second locking feature 154 at the end slot in the series of slots 158 so that the opening 162 formed by the partial alignment of the openings 132 of the first and second cage bodies 122 forms the smallest and most restricted flow area through the restricting cage 120.

[0085] As generally described above, the intermediate opening 162 is thus configured as a variable flow opening corresponding to an adjustable effective flow area through the restricting cage 120. In particular, for the illustrated example, as the intermediate opening 162 increases or decreases, the cross-sectional area of ​​the effective flow area varies linearly. For example, the area of ​​the opening 162 formed by the different alignments of the openings 132 of the first and second cage bodies 122 is linearly proportional to the relative rotational alignment of the first and second cage bodies 122 - at least over a certain range of possible rotational angles (e.g., between a fully closed configuration and a fully open configuration). Thus, in use, the incremental adjustability of the intermediate opening 162 can provide precise, linearly adjustable flow control for a flow control device (e.g., a regulator).

[0086] In general, the incremental adjustability of the restriction cage 120 can provide a high degree of flow control through a flow control device (e.g., a valve). In particular, the restriction cage 120 can be used to control the flow within the valve based on various external conditions. For example, a residential development (e.g., a community) may eventually require a relatively high gas flow rate. However, although a valve rated for a high flow rate may eventually be suitable, in the early stages of development, the gas demand may be low. In this case, a restriction cage such as the restriction cage 120 can be used to reduce the flow opening of the valve so that the flow rate is controlled to a suitable level for the required gas in the early stages of development. In particular, the fixed cage can clamp down on the flow opening of the valve so that the valve can travel within its more stable range, rather than moving a short distance (e.g., 1 mm) away from the seat in an unstable position. In addition, in use, the restriction cage can be replaced or removed as demand increases.

[0087] The variability of the confinement cage 120 can allow for flow rate adjustability based on fluid flow rate needs or requirements. Additionally, the confinement cage 120 can help ensure that the flow control device in which the confinement cage 120 is installed operates within a stable range of expected fluid flow rate requirements. As described above, fluid flow rate requirements can be determined by the development of the community as well as other factors (e.g., seasonal changes).

[0088] refer to Figure 5When the first locking feature 144 is engaged with the second locking feature 154, the first and second cages 122 can be rotatably fixed to each other. For example, in the illustrated configuration, the first locking feature 144 is fixed between two ribs of the plurality of ribs 156 of one of the series of grooves 158. Figures 4A-4C shown and in Figure 5 As further exemplified in FIG. 1 , the amount of overlap between the first and second circumferential walls 126 of each of the first and second cages 122 can be adjusted by rotating one of the first and second cages 122 relative to the other cage 122. In the example shown, the number of slots 158 corresponds to the number of alignment positions between the first and second cages 122, and therefore, the number of variable effective flow areas through the openings 162.

[0089] The use of ribs and grooves as locking features may be particularly advantageous in some circumstances, including allowing easy and guided axial movement of the cage during assembly while correspondingly providing relatively strong resistance to rotational movement. However, various other locking features may be used in other examples to provide a suitable anti-rotation (or other) locking engagement.

[0090] Further Figure 5 As shown, when the first and second cages 122 are rotatably fixed to each other, the inner surfaces 140 of the first pair of wall segments 128 face and can abut the outer surfaces 152 of the corresponding second pair of wall segments 130. In particular, because the wall segments 128 are radially offset from the wall segments 130, the wall segments 128, 130 of the first cage 122 can be staggered with the wall segments 130, 128 of the second cage 122, and the cages 122 can be axially moved into mutual engagement. In addition, also accommodated by the radial offset of the wall segments 128, 130, as a direct result of the axial engagement, the ribs 144 can be lockingly engaged with the appropriate one of the grooves 158. Thus, for example, an operator can determine the appropriate rotational alignment and then axially engage the cages 122 together to define and lock the size of the intermediate opening 162.

[0091] In some examples, an adjustable cage assembly can be configured as an infinitely adjustable restraint cage. For example, rather than having incremental alignment points between a first cage member and a second cage member (e.g., similar to cage member 122), the cage members can be secured to each other at any rotational angle along a continuous range (e.g., 360 degrees or more). In some examples, the infinitely adjustable restraint cage can include a locking mechanism to rotatably secure the first cage member relative to the second cage member. For example, the locking mechanism can include a retaining pin, a locking clip, a spring biased retainer, or an interference fit (e.g., a press fit or a friction connection). In other examples, the first cage member can be secured relative to the second cage member, such as via a welded joint or by engaging one or more other components within the flow control device.

[0092] The above description of the restraining cage 120 includes two mating cage bodies 122 having substantially rectangular openings 132 formed in respective circumferential walls 126. The rectangular openings 132 are substantially symmetrical about a vertical axis extending parallel to the central axis 134 and thus form a rectangular variable opening 162. However, in other examples, the openings in the circumferential walls of the cage bodies of the restraining cage may include various geometric shapes that may form corresponding various intermediate opening profiles that form effective flow areas through the restraining cage.

[0093] 6-8 illustrate exemplary opening profiles in a cage body that may be incorporated into a restraining cage (e.g., restraining cage 120). It should be appreciated that various geometries of opening profiles may be used in combination with the same profile (e.g., the same within tolerances inherent in producing the cage bodies to the same specifications) or different profiles formed in the first and second cage bodies to form a variable effective flow area through the restraining cage. In particular, the restraining cage may include a first cage body and a second cage body, each having the same or different opening profiles formed in a corresponding circumferential wall.

[0094] Fig. 6A 2 shows a cage profile 200 of an adjustable restraining cage according to one example of the disclosed technology. The cage profile 200 includes an opening 202 ( Figure 6B and Figure 6C 2 shows two openings of the installation, one of which is shown in dashed lines). In the example shown, the opening 202 is substantially triangular and symmetrical about a vertical axis. Figure 6B and Figure 6C Different alignments of the openings 202 of the first and second cage profiles 200 are shown to form an intermediate opening 206. As with the intermediate opening 162, the intermediate opening 206 is therefore a variable opening whose overall profile can be adjusted based on the rotational alignment of the first and second cages.

[0095] Similarly, Fig. 7A 2 shows a cage profile 220 of an adjustable restraining cage according to another example of the disclosed technology. The cage profile 220 includes an opening 222 ( Figure 7B and Figure 7C 2 shows two openings installed, one opening is shown in phantom). In the example shown, the opening 222 is substantially triangular and asymmetrical about the vertical axis. Figure 7B and Figure 7CDifferent alignments of the openings 222 of the first and second cage profiles 220 are shown to form an intermediate opening 226. Also similar to the intermediate opening 162, the intermediate opening 226 is therefore a variable opening whose overall profile can be adjusted based on the rotational alignment of the first and second cages.

[0096] Further, Fig. 8A 2 shows a cage profile 240 of an adjustable restraining cage according to another example of the disclosed technology. The cage profile 240 includes an opening 242 ( Figure 8B and Figure 8C 2 shows two openings installed, one opening is shown in phantom). In the example shown, the opening 242 includes a non-polygonal geometry having a curved portion. Figure 8B and Figure 8C Different alignments of the openings 242 of the first and second cage profiles 240 are shown to form an intermediate opening 246 that can be adjusted based on the rotational alignment of the first and second cages.

[0097] Additionally, due to the curved geometry of the opening 242, the cage profile 240 can provide a unique and non-linear effective flow area that is proportional to the rotational alignment of the first and second cages (e.g., as shown by comparing Figure 8B and 8C In other examples, other profiles (e.g., other curved or polygonal profiles) may be configured to optimize the relationship between rotational adjustment and change in effective flow area for a particular installation.

[0098] In some examples, including Figures 9 to 14 In the example presented in Example C, the adjustable cage assembly can be configured as a noise reduction cage, which can allow an operator to adjustably fine-tune the acoustic performance (e.g., maximum decibel level) of the flow control assembly for one or more specific flows (e.g., to reduce noise in the regulator as service flows are increased to meet growing customer demand). In addition, in some cases, pressure dynamics related to acoustic performance can result in poor performance of the flow control device (e.g., failure to fully open the valve to obtain maximum flow). In some examples, an adjustably configured noise reduction cage (or other similar adjustable cage assembly) can therefore allow an operator to optimize the overall performance of the valve as well as (or as an alternative) optimize the acoustic performance.

[0099] In summary, the exemplary assemblies discussed below (and elsewhere herein) may be installed and operated in a variety of flow control devices, including Figure 1 The pressure reducing regulator 100 or other flow control device discussed herein or known in the art. Figures 9 to 14The assemblies of C may be particularly suitable for use as noise reduction cages to improve acoustic performance, but these assemblies may also be beneficially used in a variety of installations and applications, including otherwise beneficially used in controlling aspects of flow dynamics near sealing assemblies of valves or other flow control devices. Similarly, the adjustable cages discussed above may be used in some cases as adjustable noise reduction cages for acoustic improvement of valve performance.

[0100] In some examples, the noise reduction cage can include multiple cages that can be selectively aligned with each other to provide different flow characteristics through the cage (e.g., substantially radial flow from or to a sealable seat of a flow control device). For example, in various combinations, one or more cages having a first pattern of flow openings can be selectively inserted into a cooperating assembly (e.g., an annular cage assembly) with another cage having a second pattern of flow openings (e.g., a different pattern) in various configurations, or can be selectively rotated to different orientations relative to another cage.

[0101] In some examples, the annular cage can be configured to selectively receive one or more cage inserts, wherein the flow characteristics of any particular configuration are determined in part by a particular pattern of flow openings of a particular selected cage insert and by a particular alignment of the flow openings of the insert with the flow openings of the annular cage (determined by the insertion orientation of the insert). For example, for any given insert, different overlaps of flow opening patterns can be provided by different insert selections, different insertion orientations or positions, or different mounting combinations with other inserts (e.g., with respect to relative position on the annular cage, relative rotational orientation, degree of symmetry, etc.). Thus, for example, an operator can provide different flow configurations for a particular flow control valve, including adapting to downstream demands that change over time by selectively installing (e.g., and reinstalling) selected inserts in selected orientations relative to a common base (annular) cage.

[0102] In some examples, similar adjustability of the noise reduction cages can be provided by rotatable annular cages, each of which includes a respective pattern of flow openings. For example, for radially nested annular cages (i.e., an arrangement in which one cage is radially nested within another cage), changes in the relative rotational orientation of the cages can provide different alignments between the flow openings of one cage and the flow openings of another cage. Thus, for example, different total flow areas or different other flow configurations (e.g., distribution patterns of flow areas) can be provided for flow through a given noise reduction cage (e.g., substantially radial flow from or to a valve seat portion) through relative rotational adjustment of the inner and outer annular cages.

[0103] Fig. 9300 is an isometric view of a cage 300 for use with an adjustable cage assembly according to an example of the disclosed technology. In particular, the cage 300 is an integrally formed (e.g., additively manufactured) annular body in which a pattern of flow openings 306 extends radially through the cage 300 between a radially inner surface 302 and a radially outer surface 304 of the cage 300. In the example shown, the flow openings 306 extend completely around the periphery of the cage 300 and extend substantially the entire axial height of the cage 300 in a regular, repeating pattern to provide a specific overall flow area for radial flow through the cage 300. Thus, for example, when the cage 300 is installed in a Figure 1 In the case of a flow control device as generally shown, flow openings 306 can define a reduced flow area for a process flow through the flow control device, wherein the control characteristics relative to a particular flow (e.g., a particular rate, fluid, condition, etc.) depend on the size, shape, and overall geometric arrangement of flow openings 306. (Although generally shown here with a plurality of openings, the different arrangements of flow openings may, in some cases, include different arrangements of a single flow opening.)

[0104] In some examples, as also discussed above, the cage can be configured to receive and removably retain one or more cage inserts to further define the control characteristics of the overall cage assembly. In some examples, the annular cage can be used in conjunction with different selected groups of inserts, wherein particular inserts are arranged in different orientations relative to each other or relative to the cage in which they are received, etc., to provide various customized configurations with corresponding flow control characteristics. For example, a first assembly having a first set of inserts secured to a first annular cage in a first orientation and sequence (e.g., along the periphery of the annular body) can provide different flow control characteristics than a second assembly having a different second set of inserts secured to the first annular cage or a third assembly having the first set of inserts secured to the first annular cage in a different second orientation or sequence.

[0105] In summary, a cage insert may include a particular pattern of flow openings, and a cage configured to receive the insert may include a particular (e.g., different) pattern of flow openings. Thus, an assembly of a particular insert and a cage having the insert oriented in a particular orientation relative to the cage may provide a particular overlapping pattern of flow openings of both the insert and the cage (e.g., a particular overlap of radial flow openings for substantially radial flow), which may provide a particular flow area through the assembly and exhibit particular other related flow control characteristics (e.g., defined by a particular geometric distribution of available (overlapping) flow areas).

[0106] In some examples, the insert can be secured to the recess of the different cages, including by sliding or snapping into place. Fig. 9 As shown, cage 300 includes an annular arrangement of recesses 320, each recess including a portion of the pattern of flow openings 306. Thus, in the absence of an insert received in recess 320 (e.g., Fig. 9 ), the cage 300 can provide a first flow control characteristic, including a flow control characteristic defined by the overall radial flow area of ​​the plurality of flow openings 306. In contrast, including as further discussed below, when a particular insert is fixed in the recess 320, the insert openings ( Fig. 9 The overall flow path (and total flow area) defined by the overlap of the flow opening 306 (not shown) with the flow opening 306 can provide a variety of other different flow control characteristics.

[0107] In some examples, the recess on the cage for receiving the cage insert may be arranged on the upstream side of the cage assembly relative to the associated process flow. Fig. 9 The interior arrangement of the recess 320 shown may correspond to radially outward flow (e.g., as Figure 1 With the recess 320 thus located on the upstream side of the process flow through the flow control device, the flow pressure of the process fluid tends to further secure the installed insert to the cage 300 rather than push the insert away from the cage 300. However, in some installations, the recess may be included on the downstream side of the cage (e.g., only on the downstream side, or on both the upstream and downstream sides). (As used in the context of an annular cage or other similar assembly, "upstream" and "downstream" refer to substantially radial flow through the cage or assembly).

[0108] As described above, the uniform array and other aspects of the pattern of flow openings 306 are given as examples only. Accordingly, although the openings 306 are shown as being spatially uniformly distributed within the recesses 320 and along the separation sections 322 of the inner surface 302 between the recesses 320, other examples may present other patterns. For example, some annular cages may include flow openings primarily (e.g., only) within the recesses, or may include different patterns of openings (e.g., different sizes, spacings, shapes, etc.) within the recesses compared to along the separation sections, or may include different patterns of openings within certain recesses or on certain separation sections compared to other recesses or separation sections.

[0109] In various examples, the insert may include various flow opening patterns, including patterns related to the size, shape, array pattern, spacing, orientation, cross-sectional flow characteristics of one or more radial flow openings. Fig. 10AAs shown, for example, the first insert 330 may include a regular alternating offset array of uniform circular flow openings 332 arranged within a substantially rectangular flow pattern area 334 that substantially fills the total available surface of the insert 330. As another example, Fig. 10B As shown, the second insert 340 may include a regular array of circular flow openings 342 having a less concentrated arrangement within a similar extended flow pattern area 344, with the flow areas of the individual openings and the pattern area 344 as a whole decreasing from top to bottom as viewed from the reference frame as shown.

[0110] Thus, for example, by inserting the insert 330 into Fig. 9 By inserting the insert 340 into a particular one of the recesses 320 of the annular cage 300, a first overlap pattern between the flow openings 332 and the flow openings 306 and a corresponding flow control characteristic of the combined assembly can be provided. In addition, by inserting the insert 340 into a particular one of the recesses 320 of the cage 300, a second different overlap pattern between the flow openings 342 and the flow openings 306 and a corresponding different flow control characteristic of the combined assembly can be provided. In addition, the insert 340 can also be similarly installed, but in the opposite orientation (e.g., with a plurality of inserts 340 disposed in the cage 300, the plurality of inserts 340 disposed in the cage 300 can ..., the plurality of inserts 340 disposed in the cage 300, the plurality of inserts 340 disposed in the cage 300, the plurality of Fig. 10B In other words and more generally, selection of a particular insert and a particular mounting configuration (e.g., position and relative orientation) can selectively provide a variety of flow control characteristics, including acoustic characteristics that can allow for optimization of a particular flow through a particular flow control device.

[0111] As generally noted above, various different patterns of flow openings may be provided so that overlapping installations of cages may provide different flow characteristics for noise reduction cage customization. In some examples, the differences in the patterns of flow openings may include differences in the flow pattern regions of a particular cage (i.e., the envelope region on the cage within which the flow openings are provided). For example, while flow region 334 is substantially rectangular, flow region 344 is substantially trapezoidal, tapering toward the bottom of insert 340 in the orientation shown. In other examples, flow openings having similar shapes and arrays as shown on inserts 330, 340 may be included in flow pattern regions of different shapes (e.g., covering more or less of the surface of the associated insert 330, 340). Similarly, the flow pattern regions in the illustrated or other configurations may be used with various other flow opening arrays.

[0112] As another example, Fig.11An assembly 348 of an annular cage 300 is shown in which three inserts 350, 352, 354 are received in adjacent recesses 320. As shown, each of the inserts 350, 352, 354 has a different pattern of flow openings. Thus, the entire assembly provides a different overlapping pattern of flow openings at each occupied recess 320 and thus provides a different corresponding local radial flow configuration. Fig.11 As shown, insert 350 is a blocking insert without any flow openings, insert 352 is a single-aperture insert having a central flow opening 356 of large diameter (e.g., at least half the axial height of cage 300), and insert 354 is a multi-aperture insert having a regular array of flow openings 358 that are each individually smaller than flow opening 356 (e.g., but larger overall) and each individually larger than Fig. 10A and 10B 32, 342 (e.g., but smaller than overall). In other examples, as also generally noted above, various other flow opening configurations are possible. Similarly, different arrangements of inserts may be installed in any one or more of the recesses 320, including multiple instances of any of the inserts 330, 340, 350, 352, 354.

[0113] In various examples, as also noted above, various structures can be used to receive and secure the inserts, including snap-fit ​​or slide-in engagements. In some examples, a dovetail connection can provide a particularly secure and easily customizable assembly. Thus, in some cases, the cage recess 320 and the associated inserts (e.g., inserts 330, 340, 350, 352, 354) can include complementary dovetail profiles. For example, as Fig.12 As shown, one or more edges (one shown) of one or more recesses (one shown) in the recesses 320 may include an undercut structure to provide a dovetail receiving profile 370, and the insert 330 may include a complementary dovetail insertion profile 380. Thus, for example, the insert 330 may be easily axially slid into and out of engagement with the annular cage 300 (e.g., prior to installation or after removal to customize the flow control device) while still maintaining a secure hold against substantial radial forces (e.g., dynamic pressure from a process flow).

[0114] In some examples, a recess for a flow control insert may include a shelf to support and secure the insert that is selectively installed into the recess. Fig.13As shown, the recess 320 of the annular cage 300 may include one or more integrally formed shoulders 390 that may receive and secure a received insert (e.g., insert 330, as shown). In some examples, including the example shown in the figure, a shelf on the cage may be included on an end of the cage that is configured to be installed proximate to an associated valve seat portion (e.g., as shown in the figure). Fig.13 Cage 300 shown).

[0115] In some examples, as also generally discussed above, radially nested cages can be rotated relative to each other (e.g., by actual rotation of one or more of the cages) to provide different overlapping patterns for flow openings and, thus, customizable flow control characteristics. Fig.14 Another exemplary adjustable cage assembly 400 is shown according to an example of the disclosed technology that can be adjusted for different flow control characteristics by adjusting the relative rotational orientation of two annular cages. In particular, the cage assembly 400 includes a radially inner (e.g., upstream) annular cage 402 that is concentrically nested within a radially outer (e.g., downstream) annular cage 404. Both cages include similar patterns of flow openings 406, 408 as shown (e.g., having flow openings of substantially the same size in substantially the same array), but other configurations are possible, including those described above.

[0116] For the arrangement shown, different alignments of the patterns of flow openings 406, 408 may result in different total flow areas or other varying flow control characteristics of the assembly 400, depending on the relative rotational orientation of the cages 402, 404 relative to one another. Fig.15A As shown, the first configuration having the first rotational orientation can provide a complete misalignment of the flow openings 406, 408, so that the assembly 400 allows a minimum flow for a given pressure drop. Fig. 15B and Fig. 15C As shown, increasing flow areas (and other changes in flow control characteristics) can thus be gradually provided. In some cases, one or more rotational configurations (not shown) can fully align flow openings 406, 408 so that assembly 400 provides maximum flow for a given pressure drop.

[0117] In some examples, the cage can be selectively locked in different configurations (e.g., different relative orientations) to provide different flow control characteristics. For example, as noted above, a snap-fit ​​configuration can be used in some configurations. In some examples, a detent device can be provided to selectively secure the rotatable cage in any of a variety of configurations. Fig.14As shown, for example, the stopper device 420 may include a protrusion 422 on the outer cage 404 and a series of corresponding (e.g., complementary) recesses 424 arranged in series along the circumference of the inner cage 402. (Alternatively, in other examples, this arrangement and other protrusion-recess arrangements may also be structurally reversed, e.g., protrusions 422 on the cage 402 and recesses 424 on the cage 404.) Accordingly, the assembly 400 may provide specific flow control characteristics depending on which recess 424 the protrusion 422 is received in. For example, the leftmost recess 424 on the cage 404 (relative to the leftmost recess 424) Fig.14 perspective view) can correspond to Fig.15A The opening overlap pattern, the next continuous recess 424 may correspond to Fig. 15B The overlapping pattern, then the next continuous concave portion 424 may correspond to Fig. 15C The overlap pattern, the rightmost recess 424 can correspond to the fully open (fully aligned) configuration. Although the stopper device 420 is shown (and described) as having a protrusion 422 and a recess 424, other combinations of stopper features (e.g., multiple complementary or other protrusions, differently shaped recesses, etc.) can be used in other stopper features according to well-known mechanical principles.

[0118] In some examples, the locking arrangement can be configured such that a particular adjustment of the cage results in a smaller effective adjustment of the alignment of two flow opening patterns. For example, the locking arrangement can include adjacent locking features that are spaced apart by a spacing that is slightly greater than the corresponding spacing between the flow openings (e.g., a non-integer multiple greater than 1 greater than the flow opening spacing). Thus, for example, manually adjusting the locking arrangement between configurations corresponding to adjacent locking features can result in a much smaller effective change in the alignment of the flow openings.

[0119] In some cases, such locking arrangements can be used with cages having flow openings with substantially equal spacing between associated adjacent flow openings. Accordingly, regular movement of the cages relative to one another can result in regular, but smaller adjustments (e.g., from complete misalignment to complete alignment) in the overlap pattern of the flow openings. For example, Fig.14 As shown, along the circumferential profile of the respective cages 402, 404, the spacing between adjacent pairs of recesses 424 may be approximately 25% greater than the spacing between adjacent groups of flow openings 406, 408. Correspondingly, a relatively large change in the rotational orientation of the cages 402, 404 (e.g., which may be more easily performed manually) may result in a relatively small change in the alignment of the pattern of flow openings 406, 408.

[0120] Although selected noteworthy combinations of flow opening patterns are presented in various figures (as discussed above and further below), other examples may include any of the various combinations of opening patterns explicitly shown herein or elsewhere. For example, radial flow openings according to one or more of the following examples may be included on one or more cooperating cages in various combinations with one or more of the cage profiles described above: for example, one cage having an array of radial flow openings as described below, while a complementary cage has a cage with larger openings as described above. Likewise, alternatively (or additionally), in some examples, the opening patterns shown or described herein for cage assembly inserts may be used on an annular cage configured to receive an insert or rotate relative to another annular cage, or vice versa.

[0121] Therefore, each example of the disclosed technology can provide a system and method for adjusting the effective flow area and other flow control characteristics in a flow control device. The foregoing description of the disclosed examples is provided to enable any person skilled in the art to make or use the disclosed technology. Various modifications to these examples will be apparent to those skilled in the art, and the general principles defined herein can be applied to other examples without departing from the spirit or scope of the disclosed technology. Therefore, the disclosed technology is not intended to be limited to the examples shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0122] As used herein, unless otherwise limited or defined, "or" represents a non-exclusive list of components or operations that can exist in any various combinations, rather than an exclusive list of components that can only exist as alternatives to each other. For example, a list of "A, B, or C" represents the following options: A; B; C; A and B; A and C; B and C; and A, B, and C. Correspondingly, the term "or" as used herein represents exclusive alternatives only when it is preceded by an exclusive term, such as "any one," "one of," "only one of," or "exactly one of." For example, a list of "one of A, B, or C" represents the following options: A, but not B and C; B, but not A and C; and C, but not A and B. A list preceded by "one or more" (and variations thereof, such as "at least one") and including "or" to separate the listed elements represents the option of one or more of any or all of the listed elements. For example, the phrases "one or more of A, B, or C" and "at least one of A, B, or C" represent the following options: one or more A; one or more B; one or more C; one or more A and one or more B; one or more B and one or more C; one or more A and one or more C; and one or more of A, one or more of B, and one or more of C. Similarly, a list preceded by "plurality" (and variations thereof) and including "or" to separate the listed elements represents the option of multiple instances of any one or all of the listed elements. For example, the phrases "plurality of A, B, or C" and "two or more of A, B, or C" represent the following options: A and B; B and C; A and C; and A, B, and C.

[0123] Also as used herein, unless otherwise limited or defined, "integral" and its derivatives (e.g., "integrally") describe an element that is manufactured as a single piece, without fasteners, adhesives, or the like to secure separate components together. For example, an element that is stamped or cast as a single piece from a single sheet of metal or a single die without rivets, screws, or adhesives to hold separately formed parts together is an integral (and integrally formed) element. In contrast, an element that is formed from multiple parts that are initially formed separately and then connected together is not an integral (or integrally formed) element.

[0124] Unless otherwise specified or limited, the terms "about," "approximately," and "substantially" used herein with respect to a reference value refer to a variation of ±5% of the reference value (inclusive of the end value).

[0125] As used herein, unless otherwise limited or specified, "substantially the same" refers to two or more components or systems that are manufactured or used according to the same processes and specifications, where the variations between the components or systems are within the limits of acceptable tolerances for the relevant processes and specifications. For example, two components may be considered to be substantially the same if they are manufactured according to the same standardized manufacturing steps, using the same materials, and within the same acceptable dimensional tolerances (e.g., as specified for a particular process or product).

Claims

1. An adjustable cage assembly for a flow control device, the adjustable cage assembly comprising: The first cage; and A second cage, each of the first cage and the second cage comprising: a first wall segment having an inner surface and an outer surface; a first locking feature formed on an inner surface of the first wall segment; a second wall segment having an inner surface and an outer surface; a second locking feature formed on an outer surface of the second wall segment; wherein the first wall segment and the second wall segment are spaced apart in a circumferential direction to form a first opening between the first wall segment and the second wall segment, and wherein the first locking feature of the first cage is configured to engage the second locking feature of the second cage to rotatably secure the first cage relative to the second cage at one of a plurality of alignments such that the first opening of the first cage is at least partially aligned with the first opening of the second cage to form a corresponding plurality of opening profiles for flow through the first cage and the second cage.

2. The adjustable cage assembly of claim 1, wherein: At least one of the first locking feature or the second locking feature includes an array of locking members.

3. The adjustable cage assembly of claim 2, wherein: The locking member array includes a plurality of ribs and a plurality of grooves between the plurality of ribs, each of the plurality of grooves or the plurality of ribs corresponding to one of the plurality of alignment portions.

4. The adjustable cage assembly of claim 1, wherein: Each of the first cage and the second cage includes a continuous annular base from which the first wall segment and the second wall segment extend axially.

5. The adjustable cage assembly of claim 1, wherein: The inner surface of the first wall segment of the first cage body at least partially overlaps the outer surface of the second wall segment of the second cage body at each of the plurality of alignment portions.

6. The adjustable cage assembly of claim 1, wherein: Each of the first cage and the second cage defines a respective central axis, and Each of the first wall segments is radially farther from the respective central axis than each of the second wall segments.

7. The adjustable cage assembly of claim 1, wherein: an opening profile corresponding to perfect radial alignment of the first opening of the first cage body and the first opening of the second cage body providing a least restrictive position for the adjustable cage assembly; wherein an opening profile corresponding to a first opening of the first wall segment of the first cage extending circumferentially to the greatest extent across the second cage provides a most restricted position for the adjustable cage assembly; and Therein, an additional intermediate opening profile can be formed between the least restrictive position and the most restrictive position in order to provide an additional intermediate position.

8. A confinement cage for a flow control device, the confinement cage comprising: a first annular member; and A second annular member, the second annular member being substantially identical to the first annular member, is configured to be rotationally fixed relative to the first annular member at a plurality of alignments to provide flow openings having a corresponding plurality of sizes to provide adjustable control of a fluid flow area through the confinement cage.

9. The restraining cage of claim 8, wherein: The first annular member includes a first circumferential wall and a first cutout formed in the first circumferential wall.

10. The restraining cage of claim 9, wherein: The second annular member includes a second circumferential wall configured to axially overlap the first circumferential wall, and Wherein, the overlap amount between the first circumferential wall and the second circumferential wall is adjusted by rotating the second annular member relative to the first annular member.

11. The restraining cage of claim 9, wherein: The second annular member includes a second circumferential wall and a second cutout formed in the second circumferential wall, and Therein, the alignment of the first cutout with the second cutout defines a current size of the flow opening.

12. The confinement cage of claim 8, wherein: The first annular member includes a first array of locking members and the second annular member includes a second locking member configured to engage the first array of locking members to secure the first annular member and the second annular member at the plurality of alignment portions.

13. The restraining cage of claim 12, wherein: The plurality of first locking members are configured as one of the recesses or the protrusions, and the second locking member is configured as the other of the recesses or the protrusions.

14. A method of adjusting an effective flow area in a flow control device, the method comprising: Rotating a first cage having a first opening relative to a second cage having a second opening to align the first opening and the second opening at any selected alignment of a plurality of alignments to define an effective flow area, the first cage being substantially identical to the second cage; rotatably securing the first cage relative to the second cage in the selected alignment of the plurality of alignments; as well as The first cage and the second cage are mounted in the flow control device at the flow control opening.

15. The method according to claim 14, wherein: Starting from a reference orientation, the effective flow area is increased by rotating the first cage relative to the second cage in a first direction, and the effective flow area is decreased by rotating the first cage relative to the second cage in a second direction opposite to the first direction.

16. The method according to claim 14, wherein: For a rotation angle within a first rotation range, by rotating the first cage relative to the second cage, the effective flow area is linearly increased or decreased in relation to the rotation angle.

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