Variable Control Orifice Valve

Abstract

To provide an apparatus for controlling flow through a flow body (100).SOLUTION: An apparatus comprises: an intake opening (102) and an output opening (108) in a flow body; a cavity with a first cross-sectional shape and an opening; and a diaphragm (114) or bellows, wherein the diaphragm or the bellows seals the opening of the cavity and the diaphragm or the bellows includes a hole. The apparatus comprises a plunger (106A) with the cross-sectional shape corresponding to the cavity, wherein the plunger is longitudinally movable in the cavity, and a plunger portion (106B) forms an orifice with the cavity portion. The apparatus comprises a rod (104A) coupled with the plunger for facilitating the longitudinal movement of the plunger, wherein the rod comprises a rod cross section that corresponds to the hole in the diaphragm or the bellows.SELECTED DRAWING: Figure 1B

Description

[Technical field]

[0001] The present disclosure provides a means for controlling and regulating the flow of gases and fluids through adjustable orifices. More specifically, the present disclosure addresses shortcomings in current methods used to regulate or maintain gas and fluid flow paths, regardless of pressure, to provide desired results. [Background technology]

[0002] In almost every market that requires precision with regards to gas and fluid flow, the process demands precise control and handling of the substances used. The gases and fluids involved must be precisely controlled in order for downstream processes to deposit, mix, and create the final product as needed to meet the user's requirements. Currently, in situations where gas and fluid flows need to be applied on a larger scale, such as oil and gas applications, there is ample room for intricate and complex systems to control the flow through adjustable orifices (automatic, semi-automatic, and manual). Additionally, with the flow of hazardous and toxic gases and fluids being controlled, it is imperative that systems containing these substances are leak-free under all circumstances. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2005 / 258390 [Patent Document 2] International Publication No. 2017 / 007888 Summary of the Invention [Problem to be solved by the invention]

[0004] As systems get smaller than 3 inches (7.62 centimeters) in diameter, especially those smaller than 2000 microns in diameter and those smaller than 100 microns in diameter, size limitations make it much more difficult to create leak-proof systems, such as adjustable orifice systems, to control the flow of gases and liquids.

[0005] It is an object of the present disclosure to provide a leak-proof system to enable precise control of fluid and gas flow, particularly from orifices less than 3 inches (7.62 centimeters) in diameter to micron diameter openings. [Means for solving the problem]

[0006] In at least one embodiment, the present disclosure provides a flow control device comprising: a flow body having an intake opening and an output opening; a cavity having a first cross-sectional shape and openings; a diaphragm or bellows sealing the opening of the cavity, the diaphragm or bellows comprising a hole; a plunger having a second cross-sectional shape corresponding to the first cross-sectional shape of the cavity, the plunger longitudinally movable within the cavity, a portion of the plunger forming an orifice with a portion of the cavity; and a rod coupled to the plunger to facilitate longitudinal movement of the plunger, the rod comprising a rod cross-section corresponding to the hole in the diaphragm or bellows. [Brief description of the drawings]

[0007] [Figure 1A] FIG. 13 is a side view of a flow body with an inlet opening and a rod, consistent with an embodiment of the present disclosure. [Figure 1B] IA shows a cross-sectional view taken along line AA of FIG. IA illustrating a flow path into the flow body, past the plunger, and out of the flow body, consistent with an embodiment of the present disclosure. [Figure 1C] FIG. 13 is a top view of a diaphragm with a ridge, consistent with an embodiment of the present disclosure. [Figure 1D] 1D is a cross-sectional view of the diaphragm of FIG. 1C consistent with an embodiment of the present disclosure. [Figure 1E] FIG. 1 is a side view of a bellows consistent with an embodiment of the present disclosure. [Figure 1F] FIG. 2 is an isometric cross-sectional view of the flow body of FIGS. 1A-1B, consistent with an embodiment of the present disclosure. [Figure 2A] 1 is a cross-sectional view of a flow body showing the flow paths entering the flow body, past the plunger, and exiting the flow body, consistent with an embodiment of the present disclosure. FIG. [Figure 2B] 2B is an isometric cross-sectional view of the flow body of FIG. 2A consistent with an embodiment of the present disclosure. [Figure 3A] 1 is a cross-sectional view of a flow body showing the flow paths entering the flow body through an opening in the plunger and exiting the flow body, consistent with an embodiment of the present disclosure. FIG. [Figure 3B] FIG. 3B is an isometric cross-sectional view of the flow body of FIG. 3A. [Figure 4] 1 is a cross-sectional view of a flow body with a diaphragm or bellows coupled (eg, welded) to the flow body, consistent with an embodiment of the present disclosure. [Figure 5A] FIG. 1 is a cross-sectional view of a flow body with a cap and a seal, where the cap is coupled to the flow body by a number of fasteners and the seal is compressed between the cap and the flow body, consistent with an embodiment of the present disclosure. [Figure 5B] 5B is an isometric cross-sectional view of a flow body with a cap and seal of FIG. 5A consistent with an embodiment of the present disclosure. [Figure 6A] 1 is a cross-sectional view of a flow body with a bolt and a seal consistent with an embodiment of the present disclosure, the bolt is coupled to the flow body by a threaded connection, and the seal is compressed between a portion of the bolt and the flow body. [Figure 6B] 6B is an isometric cross-sectional view of the flow body with the bolt and seal of FIG. 6A consistent with an embodiment of the present disclosure. FIG. [Figure 7A]FIG. 13 is a side view of an end of a rod illustrating an example opening profile comprising a portion of an ellipse, consistent with an embodiment of the present disclosure. [Figure 7B] 1 is a side view of an end of a rod illustrating an exemplary opening profile comprising a square portion, consistent with an embodiment of the present disclosure. FIG. [Figure 7C] 1 is a side view of an end of a rod illustrating an example opening profile comprising a triangular portion consistent with an embodiment of the present disclosure. FIG. [Figure 7D] 1 is a side view of an end of a rod illustrating an exemplary opening profile comprising a portion of a circle, consistent with an embodiment of the present disclosure. FIG. [Figure 8A] 1 is a side view of an end of a rod illustrating an exemplary opening profile comprising a circle, consistent with an embodiment of the present disclosure. FIG. [Figure 8B] 1 is a side view of an end of a rod illustrating an exemplary opening profile comprising a square, consistent with an embodiment of the present disclosure. FIG. [Figure 8C] 1 is a side view of an end of a rod illustrating an exemplary opening profile comprising a triangular shape consistent with an embodiment of the present disclosure. FIG. [Figure 8D] FIG. 13 is a side view of an end of a rod illustrating an exemplary opening profile comprising a pentagon, consistent with an embodiment of the present disclosure. [Figure 8E] FIG. 13 is a side view of an end of a rod illustrating an exemplary opening profile comprising a portion of a rounded rectangle, consistent with an embodiment of the present disclosure. [Figure 9A] 1 is a cross-sectional view of the end of a rod showing an exemplary opening profile for passage through the rod, which opening may be of various shapes as described above and shown in Figures 7A-7D and 8A-8E, consistent with embodiments of the present disclosure. [Figure 9B] 1 is a cross-sectional view of the end of a rod showing an exemplary opening profile for passage through the rod, which opening may be of various shapes as described above and shown in Figures 7A-7D and 8A-8E, consistent with embodiments of the present disclosure. [Figure 9C]1 is a cross-sectional view of the end of a rod showing an exemplary opening profile for passage through the rod, which opening may be of various shapes as described above and shown in Figures 7A-7D and 8A-8E, consistent with embodiments of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present disclosure provides a solution to the deficiencies in the design and implementation of flow control systems as flow path sizes decrease to flowlines smaller than 3 inches (7.62 centimeters) and flow path diameters approach micron size. Additionally, the present disclosure provides a means through which corrosive, toxic, and hazardous gases and fluids can travel and be completely sealed from the outside environment. The present disclosure also implements a means of controlling the flow path of gases and fluids outside of the sealed body within which the gases and fluids travel.

[0009] The adjustable orifice can also be used in larger systems allowing for more sophisticated actuation mechanisms. The embodiments described herein allow a user to change the orifice size without shutting down the system, opening a flow path in the flow control system, or changing the physical orifice, thereby reducing switching times while allowing the system to accommodate the adjustment of the orifice and provide consistent flow characteristics in the flow path while accommodating a drop in pressure level (i.e., a drop in vacuum) in the flow path.

[0010] The present disclosure allows actuation to effect adjustment of an orifice in a flow path body using actuation of a rod from outside the flow body by a diaphragm or bellows. The diaphragm or bellows can be made of non-metallic, metallic, or a combination of metallic and non-metallic parts and can be flexed without accessing outside the boundary of the flow path. Metallic or non-metallic diaphragms or bellows can be welded to the flow path body to completely protect the flow path from interaction with the external environment (i.e., outside the flow path). For other critical applications such as semiconductor systems, a metal seal can be used between the diaphragm or bellows and the body and compressed with specially designed bolts or compression brackets.

[0011] To allow for the change in size of the orifice, a rod and actuation device connected to a diaphragm or bellows is used to move in front of the flow path. The rod or device can have a pointed shape to control the flow characteristics with a sealed surface on top of the pointed feature. The gas and fluid inlet is at the bottom of the geometry and the outlet is at the top of the geometry past the sealed area. As the device lowers, the gas or fluid flow decreases because the distance between the wall and the pointed shape is closer and the flow is reduced. This configuration can provide a better seal in applications where gas and vacuum are used downstream of the orifice. The pointed shape or per radius can be made from a sealing material (e.g., metal, most plastic and rubber materials, PTFE, EPTFE, nylon, PVC, PVDF, PP, NBR, FKM, and EPDM). As the device continues to lower, the flow rate decreases until the sealing surface of the plunger or device contacts the sealing surface of the body, resulting in a complete blockage of flow. The sealing surface can be made of materials including but not limited to metal, most plastics, rubber materials, PTFE, EPTFE, Nylon, PVC, PVDF, PP, NBR, FKM, and EPDM. The sealing surface of the body can be smooth, raised, or with raised bumps to improve the sealing function. When the sealing surface contacts the surface of the wall of the flow body, it can completely close the flow to the gas or fluid outlet port. On the downstream side of the flow, precise raised rings at the openings of the outlet and inlet ports help the valve seal against the body. The flow body can be made of any suitable material for the gases and fluids passing through it, such as stainless steel, polymers, or other metals.

[0012] In some embodiments, positive pressure in the cavity causes the diaphragm or bellows to go to a first position (e.g., force the diaphragm or bellows away from the orifice / flow passage). A drive mechanism is used to move the orifice actuation mechanism in the enclosure to a "closed" or "more closed" position.

[0013] FIG. 1A is a side view of a flow body 100 with an inlet opening 102 and a rod 104 coupled to a plunger 106 within a cavity of the flow body 100. FIG.

[0014] FIG. 1B is a cross-sectional view AA of FIG. 1A showing a flow path to the inlet opening 102 and into the flow body 100, the flow path passing through the plunger 106A and plunger tip 106B within the cavity of the flow body. The flow path continues to the exterior of the flow body through the output opening 108. The plunger 106A can be coupled to a rod 104A that is used to move the plunger 106A and plunger tip 106B (with another rod 104B coupling the plunger 106A to the plunger tip 106B) along an axis indicated by arrow A1. The rod 104A can be coupled to an actuator (not shown in FIGS. 1A-1B). The plunger tip 106B can contact a sealing surface 110 that is integral to the flow body. The plunger can also include a welded portion 112 (i.e., a weld) and a diaphragm 114. The weld 112 can couple the rod 104A to the diaphragm 114. The weld 112 also welds the diaphragm 114 to the flow body (e.g., aweld around the perimeter / edge of the diaphragm 114). In some embodiments (not shown), the plunger 106A and plunger tip 106B can be a single element. In some embodiments, the rod 104 can be coupled to the diaphragm 114 using other methods, such as a threaded connection, an adhesive connection, or other suitable connection method.

[0015] The sealing surface 110 shown in FIG. 1B may also be referred to as a "bump" seal or a "knife-edge" seal. Bump seals may refer to various configurations of the sealing surface 110 with a rounded cross-sectional shape (shown in FIG. 1B). Knife-edge seals may refer to other configurations of the sealing surface 110 with a more pointed cross-sectional shape (e.g., triangular; more pronounced point / edge, like a knife). When the diaphragm 114 moves, the plunger 106A and plunger tip 106B may also move (e.g., longitudinally in the direction shown by arrow A1) to create a seal with the sealing surface 110, and the plunger tip 106B may contact the sealing surface 110. The plunger tip 106B may deform to match the profile of the sealing surface 110 (as shown in FIG. 1B) to block the flow path from the intake opening 102 to the output opening 108. The sealing surface 110 may be made of the same material as the plunger tip 106B or of a different material than the plunger tip 106B. If the sealing surface 110 is not made of the same material as the plunger tip 106B, the sealing surface 110 may also be one piece.

[0016] The diaphragm 114 can move due to bending of the material due to the material properties or physical configuration of the diaphragm. For example, the diaphragm 114 can include one or more ridges 115 shown in FIG. 1C, which is a top view of the diaphragm 114, that allow for additional bending (i.e., movement) of the diaphragm. FIG. 1D is a cross-sectional view of the diaphragm of FIG. 1C at AA in FIG. 1C, also showing the ridges 115. The ridges 115 can be located on both sides of the diaphragm (as shown in FIGS. 1C-1D), only on one side of the diaphragm (not shown), or only on the other side of the diaphragm (not shown). The movement of the diaphragm can be used to move the rod 104A. The diaphragm shown in FIG. 1C can also include a hole for the rod 104A to pass through. Other embodiments of the diaphragm (not shown) may omit the holes and two different rods 104 may be coupled to the diaphragm - one rod on one side of the diaphragm for coupling to the drive mechanism and another rod on the other side of the diaphragm for coupling to the plunger 106. The rods may be coupled to the diaphragm via any suitable method, including welding.

[0017] The inlet opening 102 and the output opening 108 may be offset (i.e., not aligned) to minimize the amount of movement required by the plunger 106 to change settings for different flow rates through the flow path. Offsetting the inlet opening 102 and the output opening 108 may be beneficial with respect to how the system is pressurized and where a vacuum may develop. For example, if a vacuum exists near the output opening 108, making the output opening 108 lower than the inlet opening 102 (as shown in FIG. 1B) may help maintain a desired pressure in the system near the plunger 106. In another embodiment (not shown) where a vacuum exists near the inlet opening 102, making the inlet opening lower than the output opening may be beneficial.

[0018] 1B, the portion of the plunger 106 furthest from the rod 104 can have a tip that is, for example, triangular, and the portion of the cavity proximate the tip can correspond in shape to the tip shape. Other shapes for the plunger tip are also possible (e.g., square, rounded, etc.).

[0019] FIG. 1E is a side view of a bellows consistent with an embodiment of the present disclosure. In embodiments where more travel of the plunger 106 is required, a bellows 150 can be used in place of the diaphragm 114. The bellows can be configured to allow expansion and contraction from a first shape to a second shape through its shape and structure. Here, the change from the first shape to the second shape can result in a change in the distance between the first bellows end 152 and the second bellows end 154. The change in distance can be used to move the plunger (e.g., the plunger 106) longitudinally. The bellows 150 can be a thicker element relative to the diaphragm 114 and can include a series of raised portions that allow the bellows 150 to expand and contract a greater amount (e.g., a greater amount of longitudinal travel) compared to the diaphragm 114. The bellows 150 can be made of a metal, a polymer, a combination of the two, or any suitable material that allows for the desired compressibility / expansion.

[0020] FIG. 1F is an isometric cross-sectional view of the flow body 100 of FIGS. 1A-1B, which includes an intake opening 102, a rod 104, a plunger 106 within a cavity of the flow body 100, an output opening 108, a sealing surface 110, and a weld 112 connecting the rod 104 to a diaphragm 114.

[0021] An embodiment of the present disclosure allows for adjustment of the flow path by a drive mechanism, such as a linear motor, a servo motor, a pneumatic device, a piezoelectric motor, and similar actuation devices, which can be connected to an outer portion of the diaphragm or bellows to allow movement of an orifice actuation mechanism inside the enclosure (e.g., the cavity of the flow body).

[0022] Another embodiment of the present disclosure includes a step-movement adjustable orifice option, where the user can select the position of the rod, move the rod to a pre-set and calibrated position, and switch the system between different flow characteristics by moving it from one orifice size to another. The setpoint can be manually adjusted using a screw or precision positioning dial (or other similar mechanism and / or method), and a diaphragm or bellows can be pushed or pulled until the desired setpoint is achieved for the orifice. This switching can be accomplished using pneumatic, magnetic, and / or electrically driven actuators. This method can reduce the cost of the drive system.

[0023] Yet another embodiment of the present disclosure provides the option of a manually adjustable orifice mechanism, where the user can manually move the position of the rod and then change the orifice size to the desired flow rate setting. This method reduces the cost of the actuation system while eliminating the need to disassemble the body to change the physical orifice and flow characteristics.

[0024] FIG. 2A is a cross-sectional view of the flow body showing the flow path entering the flow body 200 through the inlet opening 202 and passing through the plunger tip 206B within the cavity of the flow body 200, and the flow path exiting the flow body 200 through the output opening 208. The plunger 206A can be coupled to a rod 204A that is used to move the plunger 206A and the plunger tip 206B (with another portion of the rod 204B coupling the plunger 206A to the plunger tip 206B) along an axis indicated by arrow A2. The rod 204A can be coupled to an actuator (not shown in FIGS. 2A-2B). The plunger tip 206B can contact a sealing surface 210 integral to the flow body. The plunger can also include a welded portion 212 (i.e., weld) and a diaphragm 214. The weld 212 can couple the rod 204 to the diaphragm 214. In some embodiments (not shown), the plunger 206A and plunger tip 206B can be a single element.

[0025] The plunger 206 may be made from any suitable material, including stainless steel, PTFE, or other suitable material. 2B is an isometric cross-sectional view of the flow body of FIG. 2A, which includes an inlet opening 202, a rod 204, a plunger 206 within a cavity of the flow body 200, an output opening 208, a sealing surface 210, and a weld 212 connecting the rod 204 to a diaphragm 214. The sealing surface 210 can be made from the same material as the plunger tip 206B or from a different material than the plunger tip 206B. If the sealing surface 210 is not made from the same material as the plunger tip 206B, the sealing surface 210 can also be one piece.

[0026] The embodiment shown in Figures 2A-2B differs from the embodiment shown in Figure 1B, for example, by not including a bump seal feature on the flow body proximate to the plunger. In Figures 2A-2B, the plunger does not include a portion that deforms when it contacts a bump seal. Instead, a portion of the plunger 106 contacts a portion of the flow body 200, as shown in Figures 2A-2B, blocking the flow path from the inlet opening 202 to the output opening 208.

[0027] To calibrate the two-flow characteristic, a mold block or other flow measurement device can be used to achieve a set point position for the plunger. The set point can be manually adjusted until the desired set point is achieved.

[0028] FIG. 3A is a cross-sectional view of the flow body 300, showing a flow path entering the inlet opening 302, into the interior of the flow body 300, and passing through the plunger 306 within the cavity of the flow body 300. The flow path then continues to the exterior of the flow body 300 through the output opening 308. The plunger 306 can be coupled to a rod 304 that is used to move the plunger 306 along an axis indicated by arrow A3. The rod 304 can be coupled to an actuator (not shown in FIGS. 3A-3B). The plunger 306 can contact a sealing surface 310 that is integral to the flow body. The plunger can also include a welded portion 312 (i.e., weld) and a diaphragm 314. The weld 312 can couple the rod 304 to the diaphragm 314.

[0029] The inlet opening 302 and the output opening 308 can be in line (i.e., linear) to facilitate adjusting the flow rate through the flow passage using longitudinal movement of the plunger 306. As shown in Figure 3A, the portion of the plunger 306 furthest from the rod 304 can have a tip that is, for example, rectangular, and the portion of the cavity proximate the tip can be shaped to correspond to the tip shape. Other shapes for the plunger tip are also possible (e.g., square, rounded, etc.).

[0030] 3B is an isometric cross-sectional view of the flow body of FIG. 3A, comprising an inlet opening 302, a rod 304, a plunger 306 within a cavity of the flow body 300, an output opening 308, a sealing surface 310, and a weld 312 connecting the rod 304 to a diaphragm 314. One embodiment of the present disclosure provides an adjustable orifice. This embodiment allows the plunger (through movement of the rod) to block the flow path using several options depending on the application, type of fluid or gas, and pressure in a pressurized system or with downstream vacuum application.

[0031] One embodiment of the present disclosure can use a diaphragm or bellows to seal the outside of the body from the inside, while allowing motion from the outside of the body to be transferred to the inside of the flow body.

[0032] Another embodiment of the present disclosure uses welding to weld the diaphragm or bellows to the body and to prevent flammable, corrosive, toxic and hazardous gases and fluids from leaking out of the flow body.

[0033] 4 is a cross-sectional view of a flow body 400. The flow body 400 comprises a cavity 416 in the flow body 400 and a diaphragm 414 or bellows (not shown, e.g., bellows 150) coupled to the flow body 400 (via welds 412). The diaphragm 414 can be coupled, for example, to a plunger (not shown in FIG. 4). The flow body can comprise an inlet opening 402 and an output opening 408. Movement of the diaphragm (by direct contact with the diaphragm) can be translated to a plunger (not shown) as described herein to adjust the flow path through the flow body.

[0034] Another embodiment of the present disclosure uses a seal that fits over the diaphragm or bellows and body by using a specially designed bolt with an opening in the center, or a bracket that provides access to the center. The seal is made from materials including, but not limited to, metal, most plastic and rubber materials, PTFE, EPTFE, Nylon, PVC, PVDF, PP, NBR, FKM, and EPDM.

[0035] FIG. 5A is a cross-sectional view of a flow body 500 with a cap 518 and a seal 520, where the cap 518 is coupled to the flow body by a number of fasteners 522, and the seal 520 is compressed between the cap 518 and the flow body 500. The cap includes an opening configured to allow a rod 504 to pass through. The rod 504 can be coupled to, for example, a plunger (not shown in FIG. 5A). The seal 520 can be compressed between the cap 518 and a portion of the flow body 500, and the number of fasteners 522 can maintain the compression of the seal 520. In some embodiments (not shown) of FIG. 5A, see, for example, FIGS. 1B and 1E, a bump seal or a knife edge seal can be used instead of the seal 520. To create a seal when the cap 518 is secured in place by a number of fasteners, the cap 518 can compress the bump seal or knife edge and / or the cap 518 can deform to conform to the bump seal or knife edge.

[0036] Figure 5B is an isometric cross-sectional view of the flow body 500 with the cap 518 and seal 520 of Figure 5A. In Figures 5A-5B, the inlet opening 502 and output opening 508 are shown as being in the same plane and linear. Other embodiments (not shown) can have inlet and output openings that are offset, non-linear, or at a different angle (e.g., near perpendicular).

[0037] Another embodiment of the present disclosure seals the diaphragm or bellows to the body using a bump or knife edge machine on the sealing area of ​​the body. This component allows the diaphragm or bellows to be pressed to seal against the body using a specially designed bolt with an opening in the center or a bracket that provides access to the center.

[0038] Another embodiment of the present disclosure enables movement of the orifice actuation mechanism inside the enclosure using a drive mechanism device, such as a linear motor, servo motor, pneumatic, piezoelectric motor, and similar actuation device, connected to the outer portion of the diaphragm or bellows.

[0039] Another embodiment of the present disclosure connects the shaft to the inside of the diaphragm or bellows so that the shaft can be moved inside the flow body without accessing the outside of the flow body. The shaft can be bonded (e.g., welded) to a rod (e.g., rod 104) in some embodiments. This is useful because the diaphragm / bellows material is thin and fragile, and welding is difficult to perform due to the small amount of material present.

[0040] Another embodiment of the present disclosure uses a rod connected to a diaphragm or bellows to move the end of the rod in front of the flow path. Another embodiment of the present disclosure uses rods or devices with pointed shapes that move toward or away from similar matching shapes on the flow body to control the flow characteristics.

[0041] Another embodiment of the present disclosure uses a pointed matching shape to allow gas and fluid inlets to be at the top of the geometry and outlets past the sealing area at the bottom of the geometry (see, e.g., Figures 1B and 1F and associated discussion for more details).

[0042] Another embodiment of the present disclosure uses a pointed device (eg, plunger tip 106B) made from a sealing material including rubber or polymer, or metal, or a combination of these materials.

[0043] In another embodiment, the sealing surface can be made from materials including, but not limited to, metal, most plastic and rubber materials, PTFE, EPTFE, nylon, PVC, PVDF, PP, NBR, FKM, and EPDM.

[0044] Another embodiment of the present disclosure uses raised circular or oval rings at the outlet and inlet port openings to help the valve seal against the flow body. 6A is a cross-sectional view of a flow body 600 with a bolt 624 and a seal 620, where the bolt 624 is coupled to the flow body 600 by a threaded connection and the seal 620 is compressed by a portion of the bolt 624 and a portion of the flow body 600. The bolt 624 can include an opening configured to allow the rod 604 to pass through the bolt 624. The rod 604 can be coupled to a plunger (not shown) within the cavity 616 of the flow body 600 to facilitate longitudinal movement of the plunger within the cavity 616 to control flow from the inlet opening 602 through the cavity 616 to the output opening 608.

[0045] Seal 620 may be compressed by a portion of bolt 624 when bolt 624 is coupled to flow body 600. In some embodiments (not shown) of FIG. 6A (see, e.g., FIGS. 1B and 1E), a bump seal or knife edge seal may be used in place of seal 620, and bolt 624 may compress the bump seal or knife edge and / or deform to conform to the bump seal or knife edge to create a seal when bolt 624 is secured in place by bolt threads coupled to flow body 600.

[0046] FIG. 6B is an isometric cross-sectional view of the flow body 600 with the bolt 624 and seal 620 of FIG. 6A. Another embodiment of the present disclosure seals a diaphragm or bellows (e.g., diaphragm 614) to a flow body (e.g., flow body 600) using a bump or knife edge machine (not shown in FIGS. 6A-6B in the sealing area of ​​the flow body (e.g., flow body 600). This component compresses the diaphragm or bellows and allows the diaphragm or bellows to be sealed to the flow body 600 using a specially designed bolt (e.g., bolt 624) with an opening in the center or a bracket that provides access to the center.

[0047] Another embodiment of the present disclosure uses a drive mechanism device such as a linear motor, servo motor, pneumatic, piezoelectric motor, and similar actuation device connected to the outer portion of the diaphragm or bellows to enable movement of the orifice actuation mechanism inside the enclosure.

[0048] Another embodiment of the present disclosure connects the shaft to the inside of a diaphragm or bellows to allow the shaft to move inside the flow body without accessing the outside of the flow body.

[0049] Another embodiment of the present disclosure uses a rod connected to a diaphragm or bellows to move the end of the rod in front of the flow path. Another embodiment of the present disclosure uses a rod or device having a pointed shape and a sealing surface on top of the pointed surface.

[0050] Another embodiment of the present disclosure uses a rod connected to a diaphragm or bellows to move the end of the rod to the front of the flow path, where the rod is partially or fully profiled. Different profile shapes can change the flow characteristics of the gas or fluid (e.g., turbulence, etc.).

[0051] Another embodiment of the present disclosure uses a pointed shape on the plunger (e.g., plunger tip 106B, 206B), where the sealing surface of the plunger (e.g., plunger tip 106B) can be made from a different material (e.g., rubber or polymer) than the sealing surface of the flow body. See, e.g., Figures 2A-2B and associated discussion for more details.

[0052] Another embodiment of the present disclosure uses a raised ring (not shown) that can be machined on the flow body (e.g., flow body 600) to allow the sealed surface of the pointed device to contact the flow path and completely seal the flow path.

[0053] In another embodiment of the present disclosure, the sealing surface can be made from materials including, but not limited to, metal, most plastic and rubber materials, PTFE, EPTFE, nylon, PVC, PVDF, PP, NBR, FKM, and EPDM.

[0054] 7A-7D are side views of the ends of rods (e.g., rods 104, 204, 304, 404, 504, and / or 604) and show exemplary opening (i.e., hole) profiles including a portion of an oval section (e.g., FIG. 7A, rod 704A), a portion of a square (e.g., FIG. 7B, rod 704B), a portion of a triangle (e.g., FIG. 7C, rod 704C), and a portion of a circle (e.g., FIG. 7D, rod 704D). Other shapes of profiles are possible. The opening profile may be the same shape and / or size at both ends of the passage (as viewed from a side cross-sectional view, not shown), or the opening profile may be a different size and / or shape. The opening profile may be located at the end of the rod or at another location on the rod (e.g., near the end of the rod). In some embodiments (not shown), the opening can be located at the end of the plunger (e.g., plunger 106, 206, 306, etc.) or at another location on the plunger (e.g., adjacent the end of the plunger, see e.g., Figures 8A-8E).

[0055] Another embodiment of the present disclosure uses a portion of the shaft to block the flow path and adjust the flow characteristics. The aperture hole profile can include, but is not limited to, circles, ellipses, triangles, squares, hexagons, and other similar shapes.

[0056] As the rod moves longitudinally within the cavity, more or less flow occurs from the intake opening (e.g., intake opening 102, 202, 302, 402, 502, 602), through the cavity (e.g., cavity 116, 216, 316, 416, 516, 616), and out the output opening (e.g., output opening 108, 208, 308, 408, 508, 608) based on the amount of the opening exposed to the flow path (e.g., the portion of the opening that is not blocked by a portion of the flow body or another element).

[0057] 8A-8E are side views of the ends of rods showing exemplary partial aperture profiles, including a circle (e.g., FIG. 8A, rod 804A), a square (e.g., FIG. 8B, rod 804B), a triangle (e.g., FIG. 8C, rod 804C), a pentagon (e.g., FIG. 8D, rod 804D), a hexagonal portion (not shown), a polygonal portion (not shown), and a rounded rectangular portion (e.g., FIG. 8E, rod 804E). The apertures may be the same shape and / or size on both sides of the passage (when viewed from a side cross-sectional view (not shown)), or the aperture profiles may be different sizes and / or shapes.

[0058] Another embodiment of the present disclosure uses partial or complete openings with a varying profile. The openings can transition from a small opening to a relatively large opening, or from a relatively large opening to a small opening. For example, the openings at the inlet opening of the flow body can be relatively large and the openings at the output opening of the flow body can be relatively small. Or, the openings at the inlet opening of the flow body can be relatively small and the openings at the output opening of the flow body can be relatively large.

[0059] 9A-9C are cross-sectional views of the end of a rod showing exemplary opening profiles for passages through the rod. The openings can be a variety of shapes, as discussed above and shown in FIGS. 7A-7D and 8A-8E. The passages can taper from relatively large to relatively small along the flow path (e.g., FIG. 9A where the passage walls converge along the flow path), can taper from relatively small to relatively large along the flow path (e.g., FIG. 9B where the passage walls diverge along the flow path), and can be untapered (FIG. 9C where the passage walls are parallel). The size of the openings of the passages on the output side (near the end of the flow arrows in FIGS. 9A-9C) can be matched to the desired maximum flow rate of fluid or gas through the flow body.

[0060] The output opening can be sized to allow an upper limit (i.e., maximum flow rate) of gas or fluid flow, and actuation of the shaft and / or diaphragm or bellows can reduce the flow of fluid or gas through the flow body, preventing the flow from exceeding the maximum flow rate controlled by the size of the output opening.

[0061] One embodiment of the present disclosure provides an adjustable orifice with various options depending on the application and type of fluid or gas, as well as the pressurized system or pressure with downstream vacuum application.

[0062] It will be understood that the details of the foregoing embodiments, given for illustrative purposes, should not be construed as limiting the scope of the present disclosure. Although several embodiments of the present disclosure have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without substantially departing from the novel teachings and advantages of the present disclosure. Accordingly, all such modifications are intended to be included within the scope of the present disclosure, which is further defined in the converted utility application and the appended claims. Furthermore, it will be appreciated that many embodiments may be conceived that do not achieve all the advantages of some embodiments, particularly the preferred embodiments, but the absence of a particular advantage does not necessarily mean that such an embodiment is outside the scope of the present disclosure.

Claims

1. 1. An apparatus for controlling flow, the apparatus comprising a flow body; the apparatus further comprises an inlet opening and an output opening in the flow body, a cavity having a first cross-sectional shape and an opening, a diaphragm sealing the opening of the cavity, the diaphragm comprising an aperture, a plunger having a second cross-sectional shape corresponding to the first cross-sectional shape of the cavity, the plunger being longitudinally movable within the cavity, a portion of the plunger forming an orifice with a portion of the cavity, and a rod coupled to the plunger to facilitate the longitudinal movement of the plunger, the rod comprising a rod cross-section corresponding to the aperture in the diaphragm; the flow body comprising the cavity, the diaphragm, the plunger, a sealing surface, a passageway through the plunger, the inlet opening, and the output opening; a flow path including the intake opening, the passage through the plunger, and the output opening; the first cross-sectional shape having a bottom and a guide surface, the guide surface guiding the plunger as it slides within the cavity; the plunger having a plunger tip located at an end of the plunger; the sealing surface is disposed along the guide surface of the first cross-sectional shape; the plunger is configured to interact with the base in a first position; the plunger is configured to be spaced from the bottom in a second position; the passageway through the plunger is closed when the plunger is in the first position; the passageway through the plunger is open when the plunger is in the second position; the inlet opening and the output opening are aligned to extend transversely to the longitudinal direction of the plunger to facilitate adjustment of flow rate through the flow passage using longitudinal movement of the plunger. Device.

2. the plunger has a second cross-sectional shape corresponding to the first cross-sectional shape of the cavity.

2. The apparatus of claim 1.

3. The flow body further comprises the rod coupled to the plunger.

2. The apparatus of claim 1.

4. The apparatus further comprises an actuator; the actuator is coupled to the rod and configured to longitudinally move the plunger within the cavity between the first position and the second position.

4. The apparatus of claim 3.

5. The apparatus further comprises a manual interface coupled to the rod; the manual interface is configured to facilitate placing the plunger in the first position or the second position; 4. The apparatus of claim 3.

6. The device further comprises a profiled shape on an end of the plunger.

2. The apparatus of claim 1.

7. the profile shape comprises a partial circular, partial square, partial triangular, partial pentagonal, partial hexagonal, and partial polygonal cross-sectional shape; 7. The apparatus of claim 6.

8. The apparatus further comprises a cap coupled to the flow body by a plurality of fasteners.

2. The apparatus of claim 1.

9. The apparatus further comprises a bolt coupled to the flow body by a threaded connection; The bolt includes a rod opening.

2. The apparatus of claim 1.

10. The apparatus further comprises a seal between the flow body and the diaphragm.

10. The apparatus of claim 9.

11. The apparatus further comprises a bump seal between the flow body and the diaphragm.

10. The apparatus of claim 9.

12. The device further comprises an adhesive portion between the flow body and the diaphragm.

10. The apparatus of claim 9.

13. The rod is an actuating rod coupled to the diaphragm.

2. The apparatus of claim 1.

14. The plunger tip is configured to deform.

2. The apparatus of claim 1.

15. The deformation of the plunger tip is configured to match the profile of the sealing surface.

15. The apparatus of claim 14.

Images