Variable load chromatography valve for fluid analysis

Abstract

A chromatography valve for fluid analysis and chromatography applications is provided. The valve includes a first body having passages extending through the first body and openings at a planar face of the first body at respective passage ports. The valve also includes a second body sealingly engaged with the first body, wherein one of the first body and the second body is movable relative to the other between two or more positions to control circulation of fluid through the passages. The second body includes at least one cartridge receiving cavity for receiving at least one cartridge removably disposed in the cartridge receiving cavity. The cartridge has one or more passages for transporting fluid of a pair of passage ports depending on a position of the first body relative to the second body to cause fluid to be transported through a selected one of the passages via the at least one passage. Methods of operating the valve are also provided.

Description

Technical Field

[0001] This technical field relates generally to systems and methods related to chromatographic valves, and more specifically to systems and methods related to variable load chromatographic valves. Background Technology

[0002] Chromatographic valves come in various types and configurations. Each chromatographic valve has specific characteristics that make it more or less suitable for certain types of applications.

[0003] Rotary valves are more common because they cover a very wide range of applications and are less expensive. Rotary valves are the preferred choice at high temperatures because they do not suffer from flow decay like typical GC diaphragm valves. In diaphragm valves, the diaphragm may lose its shape depending on the temperature at which the valve is operated. In contrast, rotary valves are typically made as a single, one-piece component, maintaining their shape regardless of operating temperature conditions. That is, rotary valves are more prone to wear due to the high friction between the rotor and stator surfaces. The lifespan of a rotary valve depends heavily on the materials used in its components. As is known in chromatography, different materials are required to ensure chemical compatibility between the analyte and the valve material. The materials used for valve components are usually determined by the application in which the valve is used, rather than by material durability. The mating section between the stator and rotor in a rotary valve is also difficult to seal properly. Sealing can be achieved by matching the tapered surfaces of the rotor and stator. Considering the difficulty of properly machining two identical conical surfaces, high pressure is applied to the contact surfaces of the rotor and stator, pressing them against each other to minimize leakage at the mating joint. When actuating the valve, this additional force generates more friction between the components, thus reducing the valve's lifespan. Damage to the rotor over time due to this increased pressing force is also not uncommon. This phenomenon is exacerbated at higher temperatures.

[0004] To address the issues associated with rotary valves, diaphragm valves were introduced. Diaphragm valves offer a longer service life and superior sealing performance, often required in critical applications such as UHP (ultra-high purity) electronic gas analysis. In these diaphragm valves, communication between ports is blocked or allowed by pushing a plunger against or retracting from the diaphragm. The diaphragm is typically made of soft materials such as plastic, Kapton, polyimide, or any suitable material. To achieve a good seal, the plunger must be machined with very high precision and must have a specific surface finish relative to the diaphragm. The surface against which the plunger is pushed must be smooth and free of scratches to avoid damaging the diaphragm. Unlike rotary valves, achieving a good surface finish on a flat surface is easier than on a tapered surface. One of the challenges of diaphragm valves is the appropriate selection of the diaphragm material. The diaphragm must be smooth enough to provide a good seal, but it must also be rigid enough to spring back when the plunger retracts from the diaphragm. Furthermore, the diaphragm must maintain its shape and stiffness regardless of the valve's operating temperature. Since there is no perfect material, diaphragm materials must be selected from a wide variety of compositions to cover the broadest possible temperature range. In addition to operating temperature, selecting a suitable diaphragm composition becomes quite complex, considering the diaphragm's chemical compatibility with the sample being analyzed. And regardless of the material selection, the diaphragm suffers from temperature-induced flow rate decay over time, which is problematic for most applications.

[0005] Slide valves (also known as sliding valves) can also be used in chromatographic applications. However, due to their design, slide valves suffer from poor leakage integrity and limited lifespan. This type of valve achieves a seal by applying pressure to a component sandwiched between two other parts—the intermediate component and the sliding component. Because the pressure remains constant during valve actuation, slide valves suffer wear due to friction between the stationary and moving components. The surface area to be sealed is large, and it is difficult to machine a wide area with a uniformly smooth surface; therefore, a large pressure is required to properly seal the two wide surfaces that abut against each other. Increasing the pressure / sealing force causes more scratches on the contact surfaces, which, over time, reduce seal integrity and thus shorten the lifespan of the slide valve.

[0006] In view of the above, there is a need for an improved valve that reduces wear and friction during sliding or rotation of valves used in chromatographic and gas analysis applications. Summary of the Invention

[0007] According to a first aspect, a chromatographic valve for fluid analysis and chromatographic applications is provided. The chromatographic valve includes a valve cover having a plurality of processing channels extending through it, the valve cover having a cover mating portion, and each of the processing channels including a processing port open at the cover mating portion. The valve assembly also includes a valve body capable of engaging the valve cover and having a body mating portion adapted to face the cover mating portion, the valve body having an internal chamber having an opening defined in the body mating portion. The valve assembly also includes a valve element disposed in the opening of the valve body and having a valve element mating portion adapted to engage the cover mating portion, the valve element including at least one channel adapted to establish fluid communication between a pair of processing channels, thereby enabling fluid to flow through the selected processing channel in the processing channel via the at least one channel. The valve assembly also includes an actuation assembly disposed within an internal cavity of the valve body, the actuation assembly having: a rotation mechanism operable to rotate the valve element between two or more operating positions to control fluid circulation between processing pipes; and a load-changing mechanism adapted to apply a sealing load force to the valve element such that the valve element mating portion engages with the cover mating portion, the load-changing mechanism being adapted to cooperate with the rotation structure to selectively decrease and increase the sealing load force via the operation of the rotation mechanism.

[0008] According to a possible implementation, the rotating mechanism includes a rotor arm adapted to be rotated and a rotor head operatively connected to the rotor arm, the rotor head having a valve element receiving cavity configured to accommodate a valve element, and wherein rotation of the rotor arm causes the rotor head and the valve element to rotate accordingly.

[0009] According to a possible implementation, the load changing mechanism includes a biasing component operatively engaged with the rotor head, which is operable to adjust the range of sealing load forces that can be applied to the rotor head via operation of a rotating mechanism.

[0010] According to a possible implementation, the biasing assembly includes an internal biasing element that is operable to selectively adjust the minimum value of the range of sealing load forces.

[0011] According to a possible implementation, the internal biasing element includes: an internal stack of a Belleville washer that engages with the rotor head from below; and an internal threaded connection that engages with the internal stack of the Belleville washer to apply pressure to the internal stack of the Belleville washer, wherein the internal threaded connection is operated to selectively adjust the pressure applied to the internal stack of the Belleville washer.

[0012] According to a possible implementation, the internal biasing element includes a cylindrical thrust roller support disposed between the internal stack of the Bausch gasket and the internal threaded connection.

[0013] According to a possible implementation, the biasing assembly includes an external biasing element that is operable to selectively adjust the maximum value of the range of sealing load forces.

[0014] According to a possible implementation, the external biasing element includes: an outer stack of Bavarian gaskets that engages with the rotor head from below; and an external threaded connection that engages with the outer stack of Bavarian gaskets to apply pressure to the outer stack of Bavarian gaskets, wherein the external threaded connection is operated to selectively adjust the pressure applied to the outer stack of Bavarian gaskets.

[0015] According to possible implementations, the internal bias element and the external bias element can operate independently of each other.

[0016] According to a possible implementation, the load changing mechanism also includes a load changer that dynamically adjusts the sealing load force applied to the rotor head during rotation of the rotor head.

[0017] According to possible implementations, the load changer includes: one or more grooves defined in a disc-shaped or annular plate disposed below the rotor head; one or more spherical support grooves disposed in the bottom surface of the rotor head; and one or more spherical supports disposed in corresponding spherical support grooves, each spherical support being adapted to roll along a corresponding groove during rotor rotation, wherein one or more grooves have varying depths, thereby allowing the spherical supports to apply varying loads to the valve element by altering the compressive force applied to the rotor head.

[0018] According to a possible implementation, each groove has a planar region and a pair of inclined regions located on both sides of the planar region, the inclined regions causing the depth of the groove to vary.

[0019] According to a possible implementation, the rotor head includes: a first portion having a valve element receiving cavity; a second portion docking with a load changing mechanism; and a transition portion adapted to connect the first portion and the second portion, with a bottom portion connected to a rotor arm. The first portion is adapted to rotate at least partially independently of the second portion in angular displacement to adjust the sealing load force without rotating the valve element.

[0020] According to a possible implementation, the first part is a top part and the second part is a bottom part, and the transition part includes an alignment pin that extends through the transition part and engages with the top and bottom parts, such that rotation of the bottom part causes rotation of the top part.

[0021] According to a possible implementation, the bottom portion includes a drive mechanism configured to allow a greater range of motion of the bottom portion relative to the top portion, such that the bottom portion can engage with a load changer while the top portion remains stationary.

[0022] According to a possible implementation, the transition portion includes a transition groove that is shaped and sized to receive a corresponding alignment pin in an alignment pin, wherein the alignment pin is adapted to move along the transition groove during rotation of the bottom portion and the top portion, and wherein the alignment pin is adapted to abut against the end of the corresponding transition groove of the alignment pin to prevent further rotation of the top portion.

[0023] According to a possible implementation, the drive mechanism includes an elastic element housed within a bottom portion, an alignment pin adapted to engage the elastic element, and wherein further rotation of the bottom portion compresses and / or stretches the elastic element when the alignment pin abuts against the end of a corresponding transition groove of the alignment pin.

[0024] According to a second aspect, a chromatographic valve for fluid analysis and chromatographic applications is provided. The chromatographic valve includes: a valve cover having a plurality of processing channels extending through the valve cover, the valve cover having a cover mating portion, and each of the processing channels including a processing port open at the cover mating portion; a valve body capable of engaging the valve cover and having a body mating portion adapted to face the cover mating portion, the valve body including an internal chamber having an opening defined in the body mating portion; valve elements disposed in the opening of the valve body and adapted to engage the cover mating portion, each valve element including at least one channel adapted to establish fluid communication between a pair of processing channels, thereby enabling fluid to flow through a selected processing channel in the processing channel via the at least one channel; and an actuation assembly disposed within the internal chamber of the valve body. The actuation assembly includes: a rotation mechanism operable to rotate a valve element between two or more operating positions to control fluid circulation between processing lines; and a load changing mechanism adapted to apply a first sealing load force to the valve element when in an operating position, and adapted to apply a second sealing load force to the valve element when the valve element is rotated via the rotation mechanism, the load changing mechanism including a biasing component configured to selectively adjust the first sealing load force and the second sealing load force independently of each other.

[0025] According to a possible implementation, the biasing assembly includes: a first biasing element operable to selectively adjust a first sealing load force corresponding to a minimum sealing load force; and a second biasing element operable to adjust a second sealing load force corresponding to a maximum sealing load force.

[0026] According to a possible implementation, the actuation assembly includes a rotor head operatively connected to a rotor arm. The rotor head includes: a top portion having a valve element receiving cavity; a bottom portion abutting against a load-changing structure; and a transition portion adapted to connect the top and bottom portions, the bottom portion being connected to the rotor arm, the top portion being adapted to rotate at least partially independently of the bottom portion in angular displacement to adjust the sealing load force without rotating the valve element.

[0027] According to a possible implementation, the load changing mechanism includes: one or more grooves defined in a disc-shaped or annular plate disposed below the rotor head; one or more spherical support grooves disposed in the bottom surface of the rotor head; and one or more spherical supports disposed in corresponding spherical support grooves, each spherical support being adapted to roll along a corresponding groove during rotor rotation, wherein one or more grooves have varying depths, thereby allowing the spherical supports to apply varying loads to the valve element by altering the compressive force applied to the rotor head.

[0028] According to a possible implementation, the transition portion includes an alignment pin that extends through the transition portion and engages with the top and bottom portions, such that rotation of the bottom portion causes rotation of the top portion.

[0029] According to a possible implementation, the transition portion includes a transition groove that is shaped and sized to receive a corresponding alignment pin in an alignment pin, wherein the alignment pin is adapted to move along the transition groove during rotation of the bottom portion and the top portion, and wherein the alignment pin is adapted to abut against the end of the corresponding transition groove of the alignment pin to prevent further rotation of the top portion.

[0030] According to a possible implementation, the bottom portion includes a drive mechanism configured to allow a greater range of motion of the bottom portion relative to the top portion, such that the bottom portion can engage with a load-changing mechanism while the top portion remains stationary.

[0031] According to a possible implementation, the drive mechanism includes an elastic element housed within a bottom portion, an alignment pin adapted to engage the elastic element, and wherein further rotation of the bottom portion compresses and / or stretches the elastic element when the alignment pin abuts against the end of a corresponding transition groove of the alignment pin.

[0032] According to a possible implementation, the valve element includes a receiving cavity that is received by a pair of removable cylindrical members, shaped and sized, each including at least one channel, the cylindrical members being rotated by rotation of the top portion of the rotor head.

[0033] According to a possible implementation, the at least one channel is surrounded by an annular lip protruding from the cylindrical part mating portion, which engages with the cover mating portion and surrounds the processing port when in the operating position.

[0034] According to a possible implementation, the cylindrical member includes at least one cleaning channel that extends radially over the mating portion of the cylindrical member.

[0035] Other features of the advantages of the invention will be better understood by reading the exemplary embodiments of the invention with reference to the accompanying drawings. While the invention will be described in conjunction with exemplary embodiments, it should be understood that this is not intended to limit the scope of the invention to these embodiments. Rather, it is intended to cover all alternatives, modifications, and equivalents defined herein. Attached Figure Description

[0036] Figure 1 This is a side perspective view of a rotary valve according to a possible implementation.

[0037] Figure 2 yes Figure 1 Exploded top view of the rotary valve.

[0038] Figure 3 yes Figure 1 Bottom-view exploded perspective view of some components of the rotary valve.

[0039] Figure 3A yes Figure 3 An enlarged view of a portion of the diagram shows the processing port of the valve cover.

[0040] Figure 4 yes Figure 1 An exploded perspective view of some components of a rotary valve.

[0041] Figure 5 yes Figure 1 A cross-sectional view of the rotary valve, showing the processing pipe extending through the valve cover.

[0042] Figure 6 yes Figure 1A cross-sectional view of the rotary valve shows the fasteners and locating pins that connect the valve cover and valve body together.

[0043] Figure 7 yes Figure 1 A side perspective view of the valve's actuation assembly.

[0044] Figure 8 yes Figure 7 A side-view exploded perspective view of the actuation component.

[0045] Figure 9 yes Figure 7 A side-view exploded perspective view of the components of the actuation assembly.

[0046] Figures 10A to 10E This is a top plan view of the valve element and rotor head according to possible implementations, showing the components at different locations.

[0047] Figures 11A to 11E This is a top plan view of the bottom portion of the rotor head according to a possible implementation, showing the drive mechanism disposed in the bottom portion at different locations.

[0048] Figures 12A to 12E This is an enlarged partial view of a component of a load changer according to a possible implementation, the component including an uppermost pad and a spherical support that moves along a groove to apply a varying load.

[0049] Figure 13 This is a diagram showing the sealing load force according to the valve position, where the transition between the maximum and minimum loads is determined by... Figures 10A to 12E The movement and position of the components are limited.

[0050] Figure 14 This is a top-side perspective view of the rotor head according to a possible implementation.

[0051] Figure 15 yes Figure 14 A side-view exploded perspective view of the rotor head.

[0052] Figure 16 According to the implementation method Figure 14 The exploded perspective view of the rotor head shows the rotor head with support grooves.

[0053] Figures 17A to 17E yes Figures 11A to 11E A top plan view of another embodiment of the bottom portion of the rotor head.

[0054] Figure 18 This is a perspective view of another embodiment of the cylindrical component, showing an annular lip that protrudes or extends on the mating portion of the cylindrical component. Detailed Implementation

[0055] This invention relates to valves, and more particularly to chromatographic valves and related operating methods. The chromatographic valve according to the invention can also be referred to as a "rotary valve." The chromatographic valve includes numerous improvements, each of which can be implemented independently of each other or in combination within the valve. For example, the valve may include an improved rotating mechanism configured to reduce stress and wear (e.g., due to friction) during the rotation of one or more valve elements, thereby improving the efficiency and service life of the valve and its components. The rotating mechanism may be adapted to selectively apply loads between various elements of the valve to create a sealing load force between these elements and to reduce said sealing load force when needed. The invention will be better understood through the description of possible embodiments of the valve.

[0056] While the different embodiments of the valve described below are cylindrical rotary spool valves, it should be noted that other types of spool / movable valves, such as, for example, cone valves and spool valves, may also be used. Furthermore, the valve embodiments described herein can be used for fluids, such as, for example, gas and liquid applications.

[0057] Rough reference Figures 1 to 6 A first embodiment of valve 10 is provided. The illustrated valve embodiment is of the HPLC (High Performance Liquid Chromatography) type, but it will be understood that the features described below can be incorporated into other types of chromatographic valves. Valve 10 includes: a valve cover 100 having a plurality of processing channels 102; a valve body 200 capable of engaging the valve cover 100; at least one valve element 300 at least partially positioned within the valve body 200; and an actuation assembly 400 operatively connected to the valve element 300 to displace the valve element 300 between two or more operating positions and to selectively apply a load to the valve element 300 to engage the valve cover 100 when in one of the operating positions. In the context of this disclosure, it should be understood that the expression "valve element" refers to a movable element of valve 10 that blocks or allows fluid flow through the different processing channels 102 of the valve cover 100.

[0058] It is understood that other components, such as various fasteners and fixtures (e.g., screws, nails, bolts, nuts, washers, springs, etc.) and sealing elements (e.g., O-rings, etc.), may be provided in and / or with valve 10. For example, valve cover 100 and valve body 200 may be connected to each other using one or more fasteners 205 and locating pins 207, but it is understood that other configurations and / or connection tools are also possible and can be used. As will be described in conjunction with various embodiments, some components of valve 10 are generally cylindrical in shape, such as valve cover 100, valve body 200, and valve element 300.

[0059] Still refer to Figures 1 to 6 Multiple processing conduits 102 extend through the thickness portion of the valve cover 100 and terminate at processing ports 104, respectively. The valve cover 100 also includes a cover mating portion 106 adapted to face the valve body 200, and the processing ports 104 are open at the cover mating portion 106. It is understood that, depending on the application of the valve 10, the valve cover 100 may be provided with any suitable number of processing conduits 102 arranged in any suitable configuration. For example, in this embodiment, the valve cover 100 includes six processing conduits 102 arranged in a circular manner, such that the processing ports 104 are correspondingly arranged in a circular manner on the cover mating portion 106. In other embodiments, the valve cover 100 may be provided with four, eight, ten, twelve, or any other suitable number of processing ports 104 and arranged in any suitable 2D or 3D configuration (e.g., circular, square, etc.).

[0060] In this embodiment, the valve body 200 has a body mating portion 202 adapted to face the valve cover 100, such that when the valve 10 is assembled, the cover mating portion 106 engages with (e.g., contacts) the body mating portion 202. In this embodiment, the cover mating portion 106 has a generally flat surface 108, and the body mating portion 202 also has a generally flat surface 204, such that the two surfaces 108 and 204 can be configured to make flat contact. Figure 3 and Figure 4As can be seen, the valve body 200 may be at least partially hollow, and the valve body 200 includes an internal chamber 210 that is shaped and sized to receive at least one of the valve element 300 and the actuation assembly 400. In this embodiment, the valve body 200 includes an opening 212 defined in a flat surface 204 of the body mating portion 202 and leading to the internal chamber 210. The opening 212 may be shaped and sized to receive the valve element 300 in an opening 211. It should be noted that the valve cover 100 and the valve body 200 are fixed components of the valve 10, while the valve element 300 and the actuation assembly 400 are movable components of the valve 10.

[0061] For more specific reference Figure 2 , Figure 4 , Figure 5 , Figure 6 In this embodiment, valve element 300 may include a cylindrical member 302 adapted to be received within an opening 212 of valve body 200. The cylindrical member 302 has a cylindrical member mating portion 304 adapted to face and engage with a cap mating portion 106 during operation of valve 10. More specifically, the cylindrical member mating portion 304 has a substantially flat surface and is generally planar with the body mating portion 202 to engage the cap mating portion. As will be further described below, the cylindrical member 302 cooperates with valve cap 100 and is movable between different positions to allow (or block) communication between process lines 102. It should also be noted that during valve operation, the cylindrical member mating portion 304 and the cap mating portion 106 are in sealing contact with each other to prevent fluid loss (e.g., leakage) as fluid flows from one process line 102 to another process line 102.

[0062] Apart from Figures 2 to 6 External reference Figure 7The cylindrical member 302 includes one or more channels 310, which are shaped, sized, and configured to establish fluid communication between the processing channels 102 of the valve cover 100 when the valve element 300 is in the operating position. In this embodiment, the channel 310 includes a recess 312 defined on the cylindrical member mating portion 304, for example, the recess 312 is defined on a flat surface of the cylindrical member 302. The recess 312 may be configured to achieve fluid communication between two processing channels. For example, in the illustrated embodiment, the recess 312 is curved along the cylindrical member mating portion 304 to follow the circular configuration of the processing port 104 on the cover mating portion 106. Additionally, it is understood that recesses 312 of different volumes may be used in the same cylindrical member 302. In an alternative embodiment, the channel 310 may include a pair of channel ports (not shown) defined on the cylindrical member mating portion 304 and connected via channels extending into a thickness portion of the cylindrical member 302. In this embodiment, the valve's processing conduit can be fluidly connected by aligning the corresponding processing port with the channel port of the cylindrical component. It should be noted that other embodiments are also possible for fluidly connecting two processing conduits using valve element 300, and the channel 310 shown in the figures is merely exemplary.

[0063] In another alternative embodiment of the cylindrical member 302, and referring to Figure 18 The channel 310 may be surrounded by an annular lip 314 that protrudes or extends from or around the cylindrical member mating portion 304. In use, the annular lip 314 is adapted to engage with the cap mating portion and, when in the operating position, surround one of the processing ports. Furthermore, the cylindrical member 302 may include a cleaning channel 316 that extends radially between adjacent channels 310 (e.g., recesses 312). In this embodiment, an additional annular lip 310 may surround the cleaning channel 316, which connects to the annular lip 310 surrounding the recess 312. The cleaning channel 316 may be adapted to fluidly connect the interior or central portion 318 of the cylindrical member 302 to the surrounding or external environment when the cylindrical member 302 is engaged with the cap mating portion.

[0064] In this embodiment, the passage 310 of the cylindrical member 302 is adapted to establish fluid communication between selected processing channels of the processing conduit 102 when the valve 10 is in the operating position. In some embodiments, the valve can move between two or more operating positions, each position enabling different passages 310 to fluidly communicate with different processing channels 102. Figures 1 to 7 In the exemplary valve shown, the valve cover 100 includes six processing ports. Figure 3AThe valve element 300 includes three channels 310 disposed within the cylindrical member 302. However, the cylindrical member 302 may include any suitable number of channels / recesses 310, 312. It should be noted that in the illustrated embodiment, the shape and size of the channels 310 are configured to establish fluid communication between two adjacent processing conduits 102, but it is understood that other configurations are also possible. For example, two or more channels 310 may be adapted to communicate with each other, such that non-adjacent conduits 102 may be fluidly connected.

[0065] Now refer to Figures 7 to 9 In this embodiment, the cylindrical element 302 can be received by a portion of an actuation assembly 400 adapted to displace (e.g., rotate) the cylindrical element relative to the valve body and valve cover. More specifically, the actuation assembly 400 includes a rotation mechanism 410, which can also be referred to as the valve's "rotor," configured to rotate the valve element 300 (e.g., the cylindrical element 302) to selectively align the passage 310 with a processing port opening on the cover mating portion. In this embodiment, the rotation mechanism 410 includes a rotor head 412 and a rotor arm 414, the rotor head 412 adapted to receive the cylindrical element 302, and the rotor arm 414 connected to the rotor head 412. The rotor arm 414 is operable to rotate the rotor head 412, thereby rotating the cylindrical element 302 disposed in the rotor head 412. Therefore, it should be understood that rotating the rotor arm 414 effectively rotates the cylindrical element 302, thereby moving the valve 10 into different operating positions. In other types of valves, other mechanisms that allow the cylindrical component to move relative to the valve port can be considered.

[0066] The actuation assembly 400 may include a load-varying mechanism 420 configured to generate a variable load to push the valve element 300 against the valve cover 100. The applied load can vary depending on the position of the valve element 300. Therefore, the load-varying mechanism 420 can be adapted to apply different sealing load forces based on the different positions of the valve element 300 to engage the valve element 300 with the valve cover 100 in a sealing manner. The term "sealing load force" refers to the force used or required to form and maintain a seal between the valve element mating portion 304 and the cover mating portion 106. More specifically, in this embodiment, the load-varying mechanism 420 is adapted to cooperate with a rotating mechanism 410 that accommodates the valve element 300, such that a portion of the rotating mechanism 410 is pushed upward (e.g., toward the valve cover 100), correspondingly pushing the valve element mating portion 304 toward the cover mating portion 106. In other words, the load changing mechanism 420 can be configured to engage indirectly with the valve element 300, but it is understood that in alternative embodiments, the load changing mechanism 420 can be configured to engage directly with the valve element.

[0067] In this embodiment, when valve 10 is operated, the load changing mechanism 420 engages with valve element 300 to apply a larger sealing load force when the processing conduit (via channel 310) is open or blocked. Furthermore, the load changing mechanism 420 can cooperate with valve element 300 to apply a lower sealing load force when valve element 300 is rotated, i.e., when a lower sealing level is acceptable or desired. Reducing the sealing load force—which can also be seen as releasing pressure on the valve element—reduces friction between the cap mating portion and the cylindrical part mating portion, facilitating valve element rotation. It should be noted that without reducing the sealing load force before rotating valve element 300, the friction between the cap mating portion and the cylindrical part mating portion could cause damage to various components of valve 1 and / or cause undesirable movement of one or more components of valve 10.

[0068] In this embodiment, moving the valve element 300 from one position to another includes operating the rotation mechanism 410 to rotate the valve element 300 and align the desired processing conduit with the desired channel 310. Figures 10A to 10E As can be seen, when in a given operating position (e.g., Figure 10A and Figure 10E As shown in the figure, the sealing load force corresponds to a higher sealing force, which in Figure 13 This is represented as MAX LOAD (maximum load). Furthermore, when the valve element 300 is rotated between operating positions, the load changing mechanism 420 releases some of the pressure, thus applying a lower sealing load force to facilitate rotation. In this embodiment, the sealing load force decreases from MAX LOAD to MIN LOAD (minimum load), which corresponds to the period of movement of the valve element (e.g., ...). Figures 10B to 10D The force applied (as shown in the diagram).

[0069] Reference Figures 5 to 9 The load changing mechanism 420 can be configured to adjust the values ​​of MAX LOAD and MIN LOAD, allowing selective adjustment of higher and lower sealing load forces. More specifically, in this embodiment, the load changing mechanism 420 may include a biasing element assembly 430 configured to adjust the value of at least one of MAX LOAD and MIN LOAD. The biasing element assembly 430 includes a first biasing element 440 mounted within the internal chamber 210 of the valve body 200. The first biasing element 440 ( Figure 5(See image) It is operably engaged with the rotating mechanism 420 to bias a portion of the valve element 300 (e.g., the cylindrical abutment portion 304) against the valve cover 100 (e.g., the cover abutment portion 106). In this embodiment, the first biasing element 440 is configured to apply a predetermined sealing load force to the valve element 300, which corresponds to a normally constant minimum sealing load force (i.e., MIN LOAD).

[0070] like Figure 5 , Figure 6 and Figure 9 As can be seen, the first biasing element 440 includes a stack of Bavarian gaskets 442 and an internal threaded connection 444. The stack of Bavarian gaskets 442 engages with a rotating mechanism 410 (e.g., rotor head 412). The internal threaded connection 444 engages with the stack of Bavarian gaskets 442 and is operable to adjust the load on the stack of Bavarian gaskets 442. Therefore, it should be noted that the internal threaded connection 444 is threaded into the internal chamber 210 (e.g., threaded into the external threaded connection 454), and the tightened internal threaded connection 444 pushes against the stack of Bavarian gaskets 442, thereby applying a larger load on the rotor head 412, i.e., adjusting the value of the MIN LOAD. For example, the value of the minimum sealing load force can be adjusted between approximately 25 psi and 75 psi, such that the cylindrical mating portion 304 engages with the cap mating portion 106 in a sealing manner by a corresponding amount of pressure.

[0071] In this embodiment, the first biasing element 440 may further include a support 446 disposed between the stack of Bavarian gaskets 442 and the internal threaded connector 444. The support 446 is adapted to support the axial load applied to the stack of Bavarian gaskets 442 by the internal threaded connector 444. In other words, the internal threaded connector 444 is operable to apply a sealing load force to the support 446, which transmits the load to the stack of Bavarian gaskets 442, which in turn applies the load to the rotor head 412, so that the cylindrical member mating portion engages sealingly with the cover mating portion. In this embodiment, the support 446 is a cylindrical thrust roller support 447 configured to support the axial load provided by the internal threaded connector 444 while allowing (i.e., without hindering) rotation of the internal threaded connector 444. Additionally, the first biasing element 440 may include a rotating bushing 448. Figure 5 and Figure 6As can be seen above, the rotating bushing 448 is mounted to the rotor arm 414, and the internal threaded connection 444 is mounted on the rotating bushing 448. The rotating bushing 448 is configured to prevent rotation of the internal threaded connection 444 when the rotor arm 414 is operated (e.g., rotated), and to prevent rotation of the rotor arm 414 when the internal threaded connection 444 is operated (e.g., rotated). However, it is understood that other configurations of the first biasing element 440 and / or each component of the first biasing element 440 are also possible and can be used.

[0072] Still refer to Figure 5 , Figure 6 and Figure 9 The biasing element assembly 430 includes a second biasing element 450 mounted within the internal chamber 210 of the valve body 200. The second biasing element 450 is operatively engaged with a rotation mechanism 410 to selectively bias a portion of the valve element 300 (e.g., the cylindrical abutment 304) against the valve cover 100 (e.g., the cover abutment). In this embodiment, the second biasing element 450 is configured to apply a predetermined sealing load force to the valve element 300, which corresponds to the sealing load force desired when the valve 10 is in the operating position (i.e., for fluid conduction between two processing lines). It is understood that the sealing load force applied to the valve element in the operating position may correspond to a MAX LOAD and may be referred to as the operating sealing load force.

[0073] like Figure 6 and Figure 9 As can be seen, the second biasing element 450 includes an outer stack 452 of the Bavarian gasket and an external threaded connection 454, the outer stack 452 of the Bavarian gasket engaging with the rotating mechanism 410 (e.g., rotor head 412), and the external threaded connection 454 engaging with the outer stack 452 of the Bavarian gasket. The load changing assembly 420 may also include a load changer 456 disposed between the outer stack 452 of the Bavarian gasket and the rotor head 412. As will be further described below, the load changer 456 is adapted to dynamically change the sealing load force (e.g., for engaging the cylindrical part mating portion with the cap mating portion) to be applied to the rotor head 412 during rotation of the rotor (e.g., rotor arm 414 and rotor head 412). More specifically, the load changer 456 is configured to adjust the sealing load force from the MAX LOAD value to the MIN LOAD value, and to adjust the sealing load force back to the MAX LOAD value when the valve 10 is moved from one operating position to another.

[0074] In this embodiment, it should be noted that the external threaded connector 454 is threaded into the internal chamber 210 (e.g., threaded into the body 200), and the tightened external threaded connector 454 pushes against the external stack 452 of the Bausch gasket, thereby engaging with the load changer 456 to apply a larger operating seal load force on the rotor head 412, i.e., adjusting the value of MAX LOAD. For example, the value of the operating seal load force can be adjusted between approximately 250 psi and 750 psi, such that when fluid is conducted between paired processing pipes, the cylindrical part mating portion 304 engages with the cap mating portion 106 in a sealing manner by a corresponding amount of pressure. In some embodiments, it should be noted that the MAX LOAD value and the MIN LOAD value can depend on each other, for example, by a predetermined ratio. In exemplary embodiments, the MAX LOAD value can be 2, 5, 10, 15, 25, 50, 100, or any other suitable multiple greater than the MIN LOAD value. Furthermore, the MIN LOAD and MAX LOAD values ​​can be selected based on various factors, such as the type of fluid used, the valve's operating temperature, the fluid pressure used, the application in which the valve is used, and the materials of the valve and associated components.

[0075] In some embodiments, the internal threaded connector 444 and the external threaded connector 454 can be tightened and / or loosened independently of each other within the internal chamber 210. For some valve configurations, tightening and loosening the threaded connectors can affect the threaded connector 444, but the threaded connector 444 can subsequently be readjusted. Therefore, it should be noted that the MINLOAD and MAX LOAD values ​​can be adjusted correspondingly in a manner independent of each other. In this embodiment, and as... Figure 5 and Figure 6 As shown, the internal threaded connector 444 is screwed into the central orifice of the external threaded connector 454, and the cylindrical thrust roller support 447 is also disposed within the external threaded connector 545 (e.g., above the internal threaded connector 444). Additionally, the stack 442 of the Bavarian gasket corresponds to the internal stack 442 of the Bavarian gasket positioned in the central orifice of the external stack 452, such that load forces can be applied independently to the corresponding stacks 442 and 452 of the Bavarian gaskets (via the corresponding threaded connectors 444 and 454 of the stacks 442 and 452). In other words, the first biasing element 440 can be operated independently of the second biasing element 450.

[0076] At least one of the first biasing element 440 and the second biasing element 450 may be provided with a locking mechanism adapted to selectively lock the rotation of the biasing element, thereby preventing further adjustment of the MAX LOAD and MIN LOAD values. During operation, the biasing elements 440 and 450 can be unlocked, adjusted to the desired position, and locked in place via the respective locking mechanisms. Locking the biasing elements prevents undesirable and / or accidental movement of these components, such as movement due to valve vibration during operation.

[0077] In some implementations, and referring to Figure 5 , Figure 6 , Figure 9 as well as Figures 12A to 12E The load changer 456 includes a group of spherical supports 458 disposed between the rotor head 412 and the outer stack of Bainckia gaskets 452. The load changer 456 also includes a recess 460 shaped and sized to receive the paired spherical supports 458. In this embodiment, the recess 460 is defined in the uppermost gasket 453 of the outer stack of Bainckia gaskets, such as a disc or annular plate. Additionally, the rotor head 412 is provided with a plurality of spherical support slots 462 (see [link to documentation]). Figure 16 The spherical support groove 462 is used to receive the corresponding spherical support in the spherical support 458. During rotation of the rotor head 412, the spherical support 458 is adapted to rotate within the spherical support groove 462 and roll along the corresponding groove 460 of the spherical support 458. Therefore, the length of the groove 460 can correspond to the range of motion of the rotor head 412 (or at least a portion of the rotor head 412), that is, the spherical support 458 can roll back and forth from one end to the other end of the groove 460. In this embodiment, the spherical support 458 is positioned near the end of the corresponding groove 460 of the spherical support 458, corresponding to the operating position of the valve 10. Therefore, it is understood that the valve 10 has at least two operating positions, but it is understood that other configurations are also possible. It will be understood that, in alternative embodiments, the spherical support groove can be provided in the uppermost gasket 453, and the groove can be provided on the bottom surface of the rotor head. Alternatively, instead of the spherical support, one component in the load changer can form a waveform profile. Other mechanisms may also be considered.

[0078] Figures 12A to 12EIn the most visible configuration, each groove 460 has a varying depth from one end to the other, such that as the rotor head rotates, the spherical support 458 moves along its corresponding groove 460, thereby applying a variable load to the rotor head corresponding to the position of the spherical support 458 along the groove 460. The load changer 456 may include a cam-like surface that, when the rotor arm 414 is rotated, converts the rotational motion into translation of a rotor head biasing element, in this case formed by the outer stack 452 of a Bainck spacer. Translation occurs along the axis of rotation, i.e., along the rotor arm. More specifically, each groove 460 includes an inclined region 464 at both ends of the groove 460 and a generally flat region 465 between the inclined regions 464. In this embodiment, the depth of the groove 460 is greatest along the flat region 465 and gradually decreases along the inclined region 464 until the end of the groove 460. It should be noted that the axial vertical movement of the outer stack 452 of the Bauschka gasket is blocked (e.g., blocked above by the rotor head 412 and below by the screwed external threaded connector 454). Therefore, rotating the rotor head 412 to position the spherical support 458 into the inclined region 464 of the groove 460 creates a downward force on the outer stack 452 of the Bauschka gasket. The outer stack 452 of the Bauschka gasket is then compressed due to the downward force and transmits the compressive force to the rotor head 412, thereby increasing the sealing load force on the cylindrical mating portion 304. One or more grooves have varying depths, which allows the spherical support to apply varying loads on the valve element by changing the compressive force applied to the rotor head. In some embodiments, the spherical support 458 can be moved along the inclined region 464 to any suitable position to create a corresponding force on the rotor head. On the top of the uppermost pad 453, the spherical support 458 is moved within the corresponding groove 460 of the spherical support 458.

[0079] In some embodiments, the rotor head 412 may be adapted to cooperate with the load changer 456 such that rotation of the valve element 300 typically occurs when the sealing load force corresponds to or is close to the minimum or lowest load value (MIN LOAD value, e.g., when the spherical support 458 is within the flat region or the deepest region 465). In other words, before rotating the valve element 300, the rotor head 412 may be adapted to keep the valve element 300 substantially stationary while the load changer reduces the sealing force to be applied to the valve element 300. Therefore, it should be understood that when the sealing load force is adjusted from the minimum or lowest load (MIN LOAD) to the maximum or highest load (MAX LOAD), or when the sealing load force is adjusted from the maximum or highest load (MAX LOAD) to the minimum or lowest load (MIN LOAD), the rotor head 412 enables the valve element 300 to remain substantially stationary. As previously stated, without reducing the sealing load before rotating valve element 300, the friction between the cap mating portion and the cylindrical component mating portion may cause damage to various components of valve 10 and / or cause undesirable movement of one or more components of valve 10. Furthermore, without increasing the sealing load when the valve is in the operating position, fluid may leak through the gap between the cylindrical component mating portion and the cap mating portion.

[0080] In some implementations, such as Figure 9 and Figures 14 to 16As can be seen, the rotor head includes: a top portion 470 adapted to receive and / or retain the valve element 300; a bottom portion 480 capable of engaging with the load changer 456 and connected to the rotor arm 414; and a transition portion 475 coupled between and connecting the top portion 470 and the bottom portion 480. As will be further described below, the bottom portion 480 of the rotor head 412 is adapted to rotate at least partially independently of the top portion 470 over a small angular displacement, such that the load changer 456 can be operated to adjust the sealing load force without rotating the valve element 300. Thus, the rotor head may include at least a first component and a second component, wherein the first component may interact with or receive the valve element to control whether the processing port is blocked or connected, and wherein the second component interacts with or forms part of the load changer, the second component adjusting the load force applied to the first component and the valve element. When the rotation of the second component drives the rotation of the first component, the configuration of the first and second components allows them to be "disconnected" on a given angular path. Therefore, the second component can be rotated on an angular path larger than that of the first component. When the valve element is in the operating positions (positions A and E), the additional angular displacement of the second component allows for an increase in the load on the valve element via a load changer.

[0081] In this embodiment, the top portion 470 is provided with a valve element receiving cavity 472, which is configured to receive and / or retain the valve element 300 within the cavity. The valve element receiving cavity 472 may be shaped and sized to receive the cylindrical member 302. The cylindrical member 302 can be oriented within the cavity 472 using locating pins 473 (or any other means, tool, mechanism, etc.), such that rotation of the top portion 470 causes rotation of the cylindrical member 302. In the illustrated embodiment, rotation is achieved via three locating pins ( Figure 15 As can be seen above, the cylindrical member 302 is oriented, but it is understood that any suitable number of locating pins can be used. To position the cylindrical member in the desired orientation (e.g., in the operating position), the top portion 470 may be provided with a top abutment 471 adapted to abut against the inner wall of the internal chamber 210 of the valve body, thereby preventing further rotation of the top portion (and thus preventing further rotation of the cylindrical member). As mentioned, the bottom portion 480 is adapted to engage with the load changer 456. For example, in this embodiment, the bottom portion 480 includes a spherical support groove 462 configured to receive the spherical support 458 of the load changer 456.

[0082] Transition section or component 475 ( Figure 9 and Figure 15 (As can be seen in the image) It also includes a pair of transition grooves 478 adapted to receive alignment pins 479 extending through the transition grooves 478 for connecting the top portion 470 to the bottom portion 480. In this embodiment, the alignment pin 479 is a spring pin having a first end 479a and an opposite second end 479b, the first end 479a being adapted to engage the bottom portion 480 and the second end 479b being adapted to engage the top portion 470. In this embodiment, the transition portion 475 is aligned with the bottom portion 480 via a locating pin 476 (e.g., oriented relative to the bottom portion 480) such that rotation of the bottom portion 480 also rotates the transition portion 475. In this embodiment, the transition grooves 478 are shaped and sized to allow the alignment pins 479 to move along the transition grooves 478 (e.g., when the bottom portion 480 is rotated). It should be understood that the alignment pin 479 is configured to connect the bottom portion 480 to the top portion 470 (e.g., mechanically) such that rotation of the bottom portion 480 allows rotation of the top portion 470 and the valve element 300. As will be further described below, it should be noted that further rotation of the alignment pin 479 along the groove (i.e., in the same direction) is prevented when the alignment pin 479 abuts against the end of the transition groove 478. Therefore, further rotation of the top portion 470 is also prevented, and thus further rotation of the valve element 300 is also prevented. In some embodiments, the top portion 470 may be provided with a top abutment 471 adapted to abut against a wall / surface within the internal cavity of the valve body to further prevent rotation of the top portion. Separating the rotor head into distinct first and second portions (such as the top and bottom portions) allows control of the load applied to the valve element based on its operating position by releasing the load applied to the valve element before rotation begins, which in turn reduces wear on the valve element.

[0083] In a possible implementation, the first and second portions of the rotor head are sized, shaped, and configured such that one portion has a greater range of rotational motion than the other. Besides Figures 11A to 11E In addition, still refer to Figure 9 , Figure 14 and Figure 16The bottom portion 480 of the rotor head is adapted to have a greater range of motion than the top portion 470. Therefore, the bottom portion or second portion 480 can rotate further compared to the first or top portion 470, thereby keeping the valve element 300 substantially stationary (i.e., fixed) when the bottom portion 480 rotates and / or engages with the load changer 456. In this embodiment, the bottom portion 480 is provided with a drive mechanism 482 configured to rotate the top portion 470 via rotation of the bottom portion 480, while also enabling a greater range of motion of the bottom portion 480 relative to the top portion 470. In some embodiments, the bottom portion 480 may be provided with a bottom abutment 481 adapted to abut against a wall / surface within the internal cavity of the valve body to further prevent rotation of the bottom portion.

[0084] like Figure 15 As can be seen, the bottom portion 480 may be adapted to receive the drive mechanism 482. More specifically, in this embodiment, the drive mechanism 482 includes an elastic element 486 such as a spring or other compressible material, and the bottom portion 480 is provided with a bottom groove 484 that is shaped and sized to receive the elastic element 486. In some embodiments, the elastic element 486 may be adapted to engage with the alignment pin 479, and the elastic element 486 is designed to move the alignment pin 479 along a corresponding transition groove 478 of the alignment pin via rotation of the bottom portion 480, thereby driving the top portion 470 (i.e., enabling the top portion 470 to rotate). In this embodiment, the drive mechanism 482 includes two elastic elements 486 (e.g., one elastic element for each alignment pin 479), but other configurations are also possible.

[0085] Reference Figures 11A to 11E In this embodiment, each elastic element 486 includes a pin chamber 488 and one or more springs 490 disposed on both sides of the pin chamber 488. For example, and as... Figure 15As can be seen, spring 490 may include stacks of springs disposed on both sides of the pin compartment. Each stack of springs may include two springs positioned one on top of the other, but it is understood that the stack may include more springs arranged in any suitable configuration (e.g., three, four, five, etc.). Pin compartment 488 may be adapted to hold alignment pin 479 in the pin compartment 488 during rotation of bottom portion 480 (via rotation of rotor 414), wherein the springs 490 on both sides are configured to hold pin compartment 488 in place during rotation of top portion 470 and bottom portion 480. More specifically, spring 490 is adapted to maintain the shape of spring 490 within bottom groove 484 during rotation of top portion 470. After the top portion 470 has completed its rotation and the alignment pin 479 abuts against the end of the corresponding transition groove of the alignment pin, the bottom portion 480 can be further rotated, which compresses one or more springs 490 on the first side of the pin chamber 480 and stretches one or more springs on the second side of the pin chamber (e.g., ...). Figure 11A and Figure 11E (See in the text). Besides Figures 11A to 11E In addition, refer to Figures 12A to 12E It should be noted that the additional range of motion of the second part / bottom portion 480 corresponds to the movement of the second part / bottom portion 480 required to move the spherical support 458 onto the inclined region 464 of the corresponding groove 460 of the spherical support 458. In other words, the additional range of motion of the bottom portion 480 allows for a greater sealing load force to be applied to the rotor head (e.g., the cylindrical member), while keeping the valve element (or cylindrical member) stationary due to the alignment pin 479 abutting within the transition groove 478 of the alignment pin 479 to prevent further rotation of the first part / top portion 470.

[0086] In alternative implementations, and referring to Figures 17A to 17E The pin compartment 488 can be integrally formed as part of the bottom groove 484 of the bottom portion 480, so that the pin compartment 488 will not shift along the bottom groove during rotor rotation. In this embodiment, the pin compartment 488 defines spring abutments on both sides of the pin compartment 488, and the spring 490 can abut against the spring abutments. Figure 17A and Figure 17E As can be seen, when the bottom portion is rotated further, the alignment pin 479 is displaced outside the pin compartment 488 and along the corresponding bottom groove of the alignment pin 479 toward one of the springs 490. The spring 490 on the first side of the pin compartment is illustratively compressed, while the portion of the spring on the second side within the bottom groove 484 remains substantially stationary and therefore does not exert force on the alignment pin.

[0087] It should be noted that in each of the above embodiments, each spring 490 included in the drive mechanism 482 may have a corresponding stiffness such that the force applied to the alignment pin 479 when compressed and / or stretched is different for each spring. However, it is understood that other configurations are also possible, such as, for example, each spring of a given stack having substantially the same stiffness or each spring of a valve having the same stiffness.

[0088] Generally refer to Figures 10A to 13 The position and configuration of valve element 300 are shown. Figures 10A to 10E ), position and configuration of drive mechanism 482 Figures 11A to 11E The position and configuration of the spherical support 458 Figures 12A to 12E and the distribution of sealing load force () Figure 13 More specifically, Figures 10A to 13 Each of the components mentioned is shown during the movement of valve 10 from one operating position to another. For example, Figure 10A The position of valve element 300 is shown when the valve is in the first operating position (position A). It should be noted that the bottom portion 480 is not aligned with the top portion 470 due to the greater range of motion of the bottom portion 480. As explained above and in Figure 11A As shown, the corresponding spring 490 of the drive mechanism 482 is compressed and stretched, thereby enabling this greater range of motion of the bottom portion 480. Additionally, Figure 12A This illustrates that, in the first operating position, the spherical support 458 is positioned as an inclined portion along the inclined portion 464 of the groove 460. Accordingly, the sealing load force to be applied to the valve element is the maximum load (MAX LOAD), such as... Figure 13 It is visible in the text.

[0089] Rotating rotor arm 414 causes the bottom portion 480 to rotate toward position B, wherein the top and bottom portions are aligned. Figure 10B The spring 490 of the drive mechanism no longer deforms. Figure 11B ), and the spherical support 458 is positioned in the flat area of ​​the groove ( Figure 12B At this position, the sealing load is released and decreases towards the minimum load (MIN LOAD). Figure 13 (Position B). It should be noted that moving from position (A) to position (B) does not involve rotation of valve element 300, but does involve reducing the sealing load force to facilitate further rotation. In this embodiment, further rotation of the rotor arm enables both the bottom and top portions to rotate simultaneously. Figure 10C and Figure 10D This keeps the spring 490 of the drive mechanism 482 uncompressed / unstretched. Figure 11C and Figure 11D The spherical support remains in the flat area. Figure 12C and Figure 12D This ensures that the sealing load force remains essentially constant at MIN LOAD. Figure 13 (Positions C and D).

[0090] Finally, from position (D) to position (E), the top portion 470 remains stationary, while the bottom portion 480 is further rotated ( Figure 10E It is understandable that spring 490 is correspondingly compressed / stretched. Figure 11E ), to allow the spherical support to move onto the inclined area ( Figure 12E This will increase the sealing load force back to the maximum load (MAX LOAD). Figure 13 Position E), thereby positioning the valve in the second operating position. Therefore, it can be understood that the method for dynamically releasing the sealing load force before rotating the valve element using the valve described above may include the sole step of rotating the rotor arm. Similarly, increasing the sealing load force to operate the valve in the operating position may also include the step of rotating the rotor arm (e.g., rotating the rotor arm in the same direction as the step of releasing the sealing load force).

[0091] A corresponding method for conveying fluid between different processing lines of the aforementioned valve may include the steps of: a) applying a sealing load force when the valve element is fixed and the valve is in operation; and b) applying a reduced sealing load force when the valve is moved between at least two different operating positions. It should be noted that the applied sealing load force is independent of the fluid pressure within the valve's processing lines.

[0092] Furthermore, while embodiments of the valve and its corresponding components include certain geometric configurations explained and illustrated herein, not all of these components and geometries are essential and should therefore not be considered in a limiting sense. It should be understood that, as will be apparent to those skilled in the art, other suitable components and their cooperation, as well as other suitable geometric configurations, may also be used for the valve, as briefly explained herein and readily inferred by those skilled in the art. Moreover, it is understood that, unless otherwise stated, locative descriptions such as “top,” “bottom,” “above,” “below,” “left,” “right,” etc., should be considered in the context of the accompanying drawings and should not be considered limiting.

[0093] Furthermore, in the context of this specification, it will be assumed that all elongated objects will implicitly have a “longitudinal axis” or “centerline,” such as, for example, the longitudinal axis of a rotor arm, and it will be assumed that expressions such as “connected” and “connectable” or “mountable” and “mountable” can be interchanged, since the invention includes various components for assembling the resulting fully assembled and fully operational valve and / or associated actuation components.

[0094] Furthermore, as briefly illustrated herein and will be apparent to those skilled in the art, modifications, simplifications, alterations, omissions, and / or substitutions may be made to the components and / or steps of one or more methods of the invention described herein without departing from the scope of the invention, based on the specific applications intended for and the desired end results.

[0095] Several alternative embodiments and examples have been described and illustrated herein. The embodiments described above are intended to be exemplary only. Those skilled in the art will understand the features of the various embodiments and the possible combinations and variations of components. It will be further understood by those skilled in the art that any embodiment may be provided in combination with other embodiments disclosed herein. It is understood that the invention may be implemented in other specific applications or configurations. Therefore, these examples and embodiments should be considered illustrative rather than restrictive in all respects, and the invention is not limited to the details given herein. Thus, while specific embodiments have been illustrated and described, various modifications may be contemplated without obvious departure from the invention.

[0096] In this disclosure, embodiments are examples or implementations of chromatographic valves. The terms "one embodiment," "implementation," or "some embodiments," appearing in various ways, do not necessarily refer to the same embodiment. While various features may be described in the context of a single embodiment, these features may also be provided individually or in any suitable combination. Conversely, while a valve may be described herein in the context of a single embodiment for clarity, it may also be implemented in a single embodiment. References to "some embodiments," "implementation," "one embodiment," or "other embodiments" in the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least some embodiments, but not necessarily in all embodiments.

[0097] It should also be understood that similar features in the accompanying figures are given similar reference numerals. To maintain clarity, reference numerals are omitted when some reference numerals have already been identified in preceding figures.

Claims

1. A chromatographic valve for use in fluid analysis and chromatographic applications, the chromatographic valve comprising: A valve cover having a plurality of processing pipes extending through the valve cover, the valve cover having a cover mating portion, and each of the processing pipes including a processing port that is open at the cover mating portion; The valve body is capable of engaging with the valve cover, and the valve body has a body mating portion adapted to face the cover mating portion. The valve body includes an internal chamber with an opening defined within the body mating portion. A valve element disposed in the opening of the valve body and having a valve element mating portion adapted to engage with the cover mating portion, the valve element including at least one channel adapted to establish fluid communication between a pair of processing pipes, thereby enabling fluid to flow through a selected processing pipe in the processing pipe via the at least one channel; as well as An actuation assembly, disposed within the internal cavity of the valve body, comprises: A rotating mechanism operable to rotate the valve element between two or more operating positions, thereby controlling fluid circulation between the processing pipelines; and A load-changing mechanism is provided, adapted to apply a sealing load force to the valve element such that the valve element mating portion engages with the cover mating portion. The load-changing mechanism is adapted to cooperate with the rotating mechanism to selectively decrease and increase the sealing load force via the operation of the rotating mechanism. The rotating mechanism includes a rotor arm and a rotor head. The rotor arm is adapted to be rotated, and the rotor head is operatively connected to the rotor arm. The rotor head includes a valve element receiving cavity configured to accommodate the valve element. Rotation of the rotor arm causes corresponding rotation of the rotor head and the valve element. The rotor head includes: a first part having the valve element receiving cavity; a second part engaging with the load changing mechanism; and a transition part adapted to connect the first part and the second part, the second part being connected to the rotor arm, the second part being adapted to rotate at least partially independently of the first part in angular displacement to adjust the sealing load force without rotating the valve element.

2. The chromatographic valve according to claim 1, wherein, The load changing mechanism includes a biasing component that is operatively engaged with the rotor head and operable to adjust the range of sealing load forces that can be applied to the rotor head via operation of the rotation mechanism.

3. The chromatographic valve according to claim 2, wherein, The biasing assembly includes an internal biasing element that is operable to selectively adjust the minimum value of the range of sealing load forces.

4. The chromatographic valve according to claim 3, wherein, The internal biasing element includes: an internal stack of Bavarian gaskets that engages with the rotor head from below; and an internal threaded connection that engages with the internal stack of Bavarian gaskets to apply pressure to the internal stack of Bavarian gaskets, wherein the internal threaded connection is operated to selectively adjust the pressure applied to the internal stack of Bavarian gaskets.

5. The chromatographic valve according to claim 4, wherein, The internal biasing element includes a cylindrical thrust roller support, which is disposed between the internal stack of the Bausch gasket and the internal threaded connection.

6. The chromatographic valve according to claim 2, wherein, The biasing assembly includes an external biasing element that is operable to selectively adjust the maximum value of the range of sealing load forces.

7. The chromatographic valve according to claim 3, wherein, The biasing assembly includes an external biasing element that is operable to selectively adjust the maximum value of the range of sealing load forces.

8. The chromatographic valve according to claim 6, wherein, The external biasing element includes: an outer stack of Bavarian gaskets that engages with the rotor head from below; and an external threaded connection that engages with the outer stack of Bavarian gaskets to apply pressure to the outer stack of Bavarian gaskets, wherein the external threaded connection is operated to selectively adjust the pressure applied to the outer stack of Bavarian gaskets.

9. The chromatographic valve according to claim 7, wherein, The internal bias element and the external bias element can operate independently of each other.

10. The chromatographic valve according to any one of claims 1 to 9, wherein, The load changing mechanism further includes a load changer that dynamically adjusts the sealing load force applied to the rotor head during rotation of the rotor head.

11. The chromatographic valve according to claim 10, wherein, The load changer includes: one or more grooves defined in a disc-shaped or annular plate disposed below the rotor head; one or more spherical support grooves disposed on the bottom surface of the rotor head; and one or more spherical supports disposed in corresponding spherical support grooves, each spherical support being adapted to roll along a corresponding groove during rotor rotation, wherein one or more of the grooves have varying depths, such that the spherical supports apply varying loads to the valve element by altering the compressive force applied to the rotor head.

12. The chromatographic valve according to claim 11, wherein, Each groove has a flat area and a pair of sloping areas on either side of the flat area, the sloping areas causing the groove depth to vary.

13. The chromatographic valve according to any one of claims 1 to 9, wherein, The first portion is a top portion, and the second portion is a bottom portion. The transition portion includes an alignment pin that extends through the transition portion and engages with the top and bottom portions, such that rotation of the bottom portion causes rotation of the top portion.

14. The chromatographic valve according to claim 10, wherein, The first portion is a top portion, and the second portion is a bottom portion. The transition portion includes an alignment pin that extends through the transition portion and engages with the top and bottom portions, such that rotation of the bottom portion causes rotation of the top portion.

15. The chromatographic valve according to claim 14, wherein, The bottom portion includes a drive mechanism configured to allow a greater range of motion of the bottom portion relative to the top portion, such that the bottom portion can engage with the load changer while the top portion remains stationary.

16. The chromatographic valve according to claim 14 or 15, wherein, The transition portion includes a transition groove shaped and sized to receive a corresponding alignment pin in the alignment pin, wherein the alignment pin is adapted to move along the transition groove during rotation of the bottom portion and the top portion, and wherein the alignment pin is adapted to abut against the end of the corresponding transition groove of the alignment pin to prevent further rotation of the top portion.

17. The chromatographic valve according to claim 15, wherein, The drive mechanism includes an elastic element housed within the bottom portion, an alignment pin adapted to engage the elastic element, and wherein further rotation of the bottom portion compresses and / or stretches the elastic element when the alignment pin abuts against the end of a corresponding transition groove of the alignment pin.

18. A chromatographic valve for use in fluid analysis and chromatographic applications, the chromatographic valve comprising: A valve cover having a plurality of processing pipes extending through the valve cover, the valve cover having a cover mating portion, and each of the processing pipes including a processing port that is open at the cover mating portion; The valve body is capable of engaging with the valve cover, and the valve body has a body mating portion adapted to face the cover mating portion. The valve body includes an internal chamber with an opening defined within the body mating portion. A valve element disposed in the opening of the valve body and adapted to engage with the cover mating portion, each valve element including at least one channel adapted to establish fluid communication between a pair of processing pipes, thereby enabling fluid to flow through the at least one channel through a selected processing pipe in the processing pipes; as well as An actuation assembly, disposed within the internal cavity of the valve body, comprises: A rotating mechanism operable to rotate the valve element between two or more operating positions, thereby controlling fluid circulation between the processing pipelines; and A load-changing mechanism is provided, adapted to apply a first sealing load force to the valve element when it is in an operating position, and to apply a second sealing load force to the valve element when the valve element is rotated via the rotating mechanism. The load-changing mechanism includes a biasing component configured to selectively adjust the first sealing load force and the second sealing load force independently of each other. The actuation assembly includes a rotor head operatively connected to a rotor arm, the rotor head comprising: The top portion is provided with a valve element receiving cavity; The bottom portion engages with the load-changing mechanism; and A transition portion, adapted to connect the top portion and the bottom portion, The bottom portion is connected to the rotor arm and is adapted to rotate at least partially independently of the top portion in angular displacement to adjust the sealing load force without rotating the valve element.

19. The chromatographic valve according to claim 18, wherein, The bias component includes: - A first biasing element, operable to selectively adjust the first sealing load force corresponding to the minimum sealing load force, and - A second biasing element, which is operable to selectively adjust the second sealing load force corresponding to the maximum value of the sealing load force.

20. The chromatographic valve according to claim 18, wherein, The load changing mechanism includes: one or more grooves defined in a disc-shaped or annular plate disposed below the rotor head; one or more spherical support grooves disposed on the bottom surface of the rotor head; and one or more spherical supports disposed in corresponding spherical support grooves, each spherical support being adapted to roll along a corresponding groove during rotor rotation, wherein one or more of the grooves have varying depths, thereby allowing the spherical supports to apply varying loads to the valve element by altering the compressive force applied to the rotor head.

21. The chromatographic valve according to claim 18, wherein, The transition portion includes an alignment pin that extends through the transition portion and engages with the top portion and the bottom portion, such that rotation of the bottom portion causes rotation of the top portion.

22. The chromatographic valve according to claim 21, wherein, The transition portion includes a transition groove shaped and sized to receive a corresponding alignment pin in the alignment pin, wherein the alignment pin is adapted to move along the transition groove during rotation of the bottom portion and the top portion, and wherein the alignment pin is adapted to abut against the end of the corresponding transition groove of the alignment pin to prevent further rotation of the top portion.

23. The chromatographic valve according to claim 18, 20 or 21, wherein, The bottom portion includes a drive mechanism configured to allow a greater range of motion of the bottom portion relative to the top portion, such that the bottom portion can engage with the load-changing mechanism while the top portion remains stationary.

24. The chromatographic valve according to claim 23, wherein, The drive mechanism includes an elastic element housed within the bottom portion, an alignment pin of the transition portion adapted to engage the elastic element, and wherein further rotation of the bottom portion compresses and / or stretches the elastic element when the alignment pin abuts against the end of a corresponding transition groove of the alignment pin.

25. The chromatographic valve according to claim 18, wherein, The valve element includes a receiving cavity that is received by a pair of shaped and sized removable cylindrical members, each cylindrical member including at least one channel, the rotation of which is caused by rotation of the top portion of the rotor head.

26. The chromatographic valve according to claim 25, wherein, The at least one channel is surrounded by an annular lip that protrudes from the cylindrical part mating portion, engages with the cover mating portion, and surrounds the processing port when in the operating position.

27. The chromatographic valve according to claim 26, wherein, The cylindrical component includes at least one cleaning channel that extends radially over the mating portion of the cylindrical component.

Images