Micro-jet valve and high-pressure homogenizing equipment

Abstract

The invention relates to the technical field of micro-jet valves, in particular to a micro-jet valve and high-pressure homogenizing equipment. The micro-jet valve comprises a valve body, the valve body comprises a shell and a gland, the shell and the gland are detachably connected, an inlet is formed in the gland, an outlet is formed in the shell, a containing cavity is formed between the gland and the shell, and the containing cavity is communicated with the shell in the direction from the inlet to the outlet. An impact structure and a pressing structure are sequentially arranged in the containing cavity. By arranging the shell and the gland which are detachably connected, parts in the valve body can be disassembled and assembled, so that when blockage occurs or the size of the slit needs to be changed, the gland can be disassembled from the shell, the internal pressing structure and the internal impact structure can be taken out for replacement or cleaning, and due to the fact that the flow dividing channel is formed in the containing cavity, the flow dividing effect is good. The strength of the impact structure can be increased, and then the compression strength is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-jet valves, and in particular to a micro-jet valve and a high-pressure homogenizing device. Background Art

[0002] The micro-jet valve with high-pressure homogenization function is the core component of the high-pressure homogenization equipment. Its core function is to break up and evenly disperse the particles, droplets or cells in the material through high-pressure jet, shear force, cavitation effect and collision.

[0003] At present, a common micro-jet valve on the market includes a valve body with an integrated closed structure and a diamond structure fixed inside the valve body. A Y-shaped channel is opened on the diamond structure. The Y-shaped channel includes two groups of flow channels. Each group of flow channels includes a connected diversion channel and a slit. The two slits are connected at one end away from the diversion channel. The material is diverted from the inlet of the valve body through the two diversion channels and the slits, and then collides and converges, thereby homogenizing the material.

[0004] However, since the micro-jet valve mentioned above adopts a completely enclosed (integrated) form, the components inside the valve body cannot be replaced, resulting in the slit size being unable to be adjusted. If a blockage occurs, the internal components cannot be removed separately for cleaning. In addition, the opening of a diversion channel on the diamond structure will result in low strength of the diamond structure and thus low compressive strength. Summary of the Invention

[0005] (1) The problem to be solved by the present invention is that the components inside the valve body cannot be replaced, resulting in the inability to adjust the slit size. If a blockage occurs, the internal components cannot be removed separately for cleaning. In addition, the opening of a diversion channel in the diamond structure will lead to a decrease in the strength of the diamond structure and thus a decrease in the compressive strength.

[0006] (2) Technical solution The present invention provides a micro-jet valve, comprising a valve body; The valve body comprises a shell and a gland, and the shell and the gland are detachably connected; The gland is provided with an inlet, the shell is provided with an outlet, and a receiving cavity is formed between the gland and the shell. An impact structure and a pressing structure are sequentially provided in the receiving cavity along the direction from the inlet to the outlet; A diversion channel connected to the inlet is symmetrically provided on the side wall of the accommodating cavity, and the impact structure is provided with at least one group of microchannels, wherein the microchannels include two symmetrical slits, the inlet ends of the two slits are both connected to the diversion channel, and the outlet ends of the two slits are opposite to each other; The compression structure is provided with a circulation channel, and both ends of the circulation channel are respectively connected with the microchannel and the outlet.

[0007] According to one embodiment of the present invention, the accommodating cavity includes a first chamber and a second chamber, and the diverter channel includes a first guide groove and a second guide groove; The first side wall is provided with the first guide groove, and the second side wall is provided with the second guide groove; The first guide groove and the second guide groove are vertically arranged, and the first guide groove and the second guide groove are connected to each other to form the diversion channel.

[0008] According to one embodiment of the present invention, the impact structure includes a first impact block and a second impact block abutting against each other; A first impact groove and a second impact groove are respectively formed at both ends of the first impact block; Therefore, the microchannels are provided on both end surfaces of the first impact block, and the end thereof away from the second impact block abuts against the first side wall; An annular groove is formed on the second side wall, and the diversion channel is connected to the slit through the annular groove; The second impact block is provided with a first through hole, and the first through hole, the second impact groove and the slit are interconnected.

[0009] According to one embodiment of the present invention, the pressing structure includes a retaining frame and a pressing member, the impact structure is arranged in the first chamber, and the retaining frame is arranged in the second chamber; The circulation channel includes a second through hole opened in the retainer, and a cavity connected to the second through hole is provided in the retainer. One end of the pressing member abuts against the side wall of the cavity, and the other end abuts against the impact structure.

[0010] According to one embodiment of the present invention, the two ends of the retainer respectively have a first arcuate surface and a second arcuate surface; The second chamber has a first arcuate wall and a second arcuate wall opposite to each other; The first arcuate surface abuts against the first arcuate wall, and the second arcuate surface abuts against the second arcuate wall.

[0011] According to one embodiment of the present invention, the retaining frame includes a mounting block, and both end surfaces of the mounting block are the first arcuate surface and the second arcuate surface respectively; The cavity is provided in the mounting block, and the second through hole communicating with the outlet is also provided in the mounting block.

[0012] According to one embodiment of the present invention, the retainer includes an annular block and an abutment block; The cavity is provided in the annular block, one end of the annular block abuts against the abutting block, and the surfaces of the annular block and the abutting block that are away from each other are the first arcuate surface and the second arcuate surface respectively; The abutment block is provided with the second through hole communicated with the outlet.

[0013] According to one embodiment of the present invention, the pressing member includes a pressing ring, a T-block and a spring; The pressure ring and the spring are sleeved on the T-block; One end of the spring is connected to the T-block, and the other end is connected to the pressure ring; The T-block is provided with a third through hole, and the first through hole, the third through hole and the second through hole are connected in sequence.

[0014] According to one embodiment of the present invention, the valve body includes a first connecting member and a second connecting member; A first groove for connecting to the first connecting member is provided on a side of the gland away from the housing; A second groove for connecting the second connecting member is provided on a side of the housing away from the gland; The first groove, the second chamber and one side of the second groove are respectively connected with a first leak detection port, a second leak detection port and a third leak detection port.

[0015] A high-pressure homogenizing device comprises any one of the microfluidic valves described above.

[0016] Beneficial effects of the present invention: By providing a detachably connected shell and pressure cover, the internal components of the valve body can be disassembled and assembled, so that when blockage occurs or the slit size needs to be changed, the pressure cover can be removed from the shell, and the internal clamping structure and impact structure can be taken out for replacement or cleaning. Moreover, since a diversion channel is opened in the accommodating cavity, the strength of the impact structure can be increased, thereby improving the pressure resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A cross-sectional view of a microfluidic valve having a first compression structure provided by an embodiment of the present invention; Figure 2 A cross-sectional view of a microfluidic valve having a second compression structure provided by an embodiment of the present invention; Figure 3 A cross-sectional view of a microfluidic valve having a third compression structure provided by an embodiment of the present invention; Figure 4 The embodiment of the present invention provides Figure 1 Magnified view of part A of the species; Figure 5 A side view of a first impact block provided in an embodiment of the present invention.

[0019] Icons: 1. Pressure cap; 101. Inlet; 2. Shell; 201. Outlet; 3. Diversion channel; 301. First guide groove; 302. Second guide groove; 4. Slit; 5. Annular groove; 6. First impact block; 601. First impact groove; 602. Second impact groove; 7. Second impact block; 701. First through hole; 8. Mounting block; 9. Annular block; 10. Abutment block; 11. Pressing ring; 12. Spring; 13. T-block; 14. First leak detection port; 15. Second leak detection port; 16. Third leak detection port; 17. External threaded ring; 18. Internal threaded ring; 19. First connecting pipe; 20. Second connecting pipe; 21. Fastener. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1: like Figure 1-Figure 5 As shown, one embodiment of the present invention provides a microfluidic valve, comprising a valve body; The valve body includes a shell 2 and a gland 1, and the shell 2 and the gland 1 are detachably connected; The gland 1 is provided with an inlet 101, and the shell 2 is provided with an outlet 201. A receiving cavity is formed between the gland 1 and the shell 2. An impact structure and a compression structure are sequentially provided in the receiving cavity along the direction from the inlet 101 to the outlet 201. A diversion channel 3 connected to the inlet 101 is symmetrically provided on the side wall of the accommodating chamber. The impact structure is provided with at least one set of microchannels, each of which includes two symmetrical slits 4. The inlet ends of the two slits 4 are both connected to the diversion channel 3, and the outlet ends of the two slits 4 are opposite to each other. A circulation channel is provided on the compression structure, and both ends of the circulation channel are connected to the slit 4 and the outlet 201 respectively.

[0022] After entering through the inlet 101 , the material is split through the symmetrically opened split channel 3 . The split material collides with each other through the two slits 4 at high speed, and is homogenized by the collision between particles. After homogenization, the material flows out from the outlet 201 through the flow channel.

[0023] By providing a detachably connected shell 2 and pressure cover 1, the internal components of the valve body can be disassembled and assembled, so that when blockage occurs or the size of the slit 4 needs to be changed, the pressure cover 1 can be removed from the shell 2, and the internal clamping structure and impact structure can be taken out for replacement or cleaning. Moreover, since the diverter channel 3 is opened in the accommodating cavity, there is no need to open the diverter channel 3 on the impact structure, which can increase the strength of the impact structure and thus improve the pressure resistance.

[0024] Furthermore, the accommodating chamber includes a first chamber and a second chamber, the first chamber has a first side wall and a second side wall connected to each other, the diversion channel 3 includes a first guide groove 301 and a second guide groove 302, the first guide groove 301 is symmetrically provided on the first side wall, and the second guide groove 302 is symmetrically provided on the second side wall; The first guide grooves 301 and the second guide grooves 302 in each group of diversion channels 3 correspond to each other one by one. The first guide grooves 301 and the second guide grooves 302 are vertically arranged and connected to each other to form the diversion channels 3 .

[0025] The first side wall is perpendicular to the direction from the inlet 101 to the outlet 201 . The first guide groove 301 extends radially from the center of the gland 1 . The second guide groove 302 extends along the direction from the inlet 101 to the outlet 201 .

[0026] According to one embodiment of the present invention, the impact structure includes a first impact block 6 and a second impact block 7 that are in contact with each other; The first impact block 6 has a first impact groove 601 and a second impact groove 602 at both ends thereof; Therefore, microchannels are provided on both end surfaces of the first impact block 6, and the end thereof away from the second impact block 7 abuts against the first side wall; An annular groove 5 is formed on the second side wall, and the diversion channel 3 is connected to the slit 4 through the annular groove 5; The second impact block 7 is provided with a first through hole 701 , and the first through hole 701 , the second impact groove 602 and the slit 4 are interconnected.

[0027] Preferably, the microchannels are provided in one group, and optionally, the microchannels are provided in multiple groups.

[0028] Preferably, the microchannels on both end faces of the first impact block 6 have different sizes, and the first impact block 6 can be turned over to replace the microchannel on the other end face as needed.

[0029] Optionally, the microchannels opened on both end surfaces of the first impact block 6 have the same size. When one side is damaged, the first impact block 6 is turned over and the other side is replaced for continued use, thereby saving costs.

[0030] Since the annular groove 5 is set up to gather the materials after being diverted through the two groups of diversion channels 3 again, the end of the slit 4 of the first impact block 6 does not need to correspond to the end of the diversion channel 3 when installing, the installation efficiency is higher, and after disassembly and replacement, it is not easy for the micro jet valve to be unusable due to problems with the installation direction.

[0031] The first impact block 6 and the second impact block 7 are both made of diamond and embedded in the first chamber. They are wear-resistant and have high compressive strength. A metal layer can be wrapped around the outside of the diamond to further enhance the compressive strength.

[0032] By setting the first impact groove 601, the material entering from the inlet 101 can be impacted into the first impact groove 601 and then diverted through the two first guide grooves 301. The material in each first guide groove 301 is then merged into the annular groove 5 after passing through the second guide groove 302. The materials gathered in the annular groove 5 enter the two slits 4 respectively and collide from the outlet end of the slit 4. The collision position is in the second impact groove 602. The material after collision homogenization passes through the first through hole 701, the third through hole and the second through hole in turn and then flows out from the outlet 201.

[0033] Preferably, the first impact groove 601 and the second impact groove 602 are circular grooves, which facilitates processing and reduces material accumulation caused by sharp corners.

[0034] like Figure 5 As shown, the two slits 4 are symmetrically arranged, and the sum of the length of the slit 4 and the radius of the second impact groove 602 is equal to the radius of the first impact block 6. Taking one side of the second impact groove 602 as an example, one end of each slit 4 is connected to the second impact groove 602, and the other end extends to the side wall surface of the first impact block 6.

[0035] According to one embodiment of the present invention, the pressing structure includes a retaining frame and a pressing member, the impact structure is disposed in the first chamber, and the retaining frame is disposed in the second chamber; The circulation channel includes a second through hole opened in the retainer, a cavity connected to the second through hole is provided in the retainer, one end of the pressing member abuts against the side wall of the cavity, and the other end abuts against the impact structure.

[0036] According to one embodiment of the present invention, the pressing member includes a pressing ring 11, a T-block 13 and a spring 12; The pressure ring 11 and the spring 12 are sleeved on the T-block 13; One end of the spring 12 is connected to the T-block 13, and the other end is connected to the pressure ring 11; The T-shaped block 13 is provided with a third through hole, and the first through hole 701, the third through hole and the second through hole are sequentially connected. The third through hole and the second through hole form a circulation channel. The circulation channel is formed by the third through hole and the second through hole being connected.

[0037] According to one embodiment of the present invention, both ends of the retainer have a first arcuate surface and a second arcuate surface respectively; The second chamber has a first arcuate wall and a second arcuate wall facing each other; The first arcuate surface abuts against the first arcuate wall, and the second arcuate surface abuts against the second arcuate wall.

[0038] The first arcuate surface and the second arcuate surface on both sides of the retainer can automatically align the retainer, and the first arcuate surface and the second arcuate surface are both rotating arcuate surfaces, which can ensure effective sealing relative to ordinary planes.

[0039] The cage can be set in two forms: According to one embodiment of the present invention, the first type of retainer is as follows: Figure 1 and Figure 3 As shown, the retainer includes a mounting block 8, and both end surfaces of the mounting block 8 are a first arcuate surface and a second arcuate surface respectively; A cavity is defined in the mounting block 8 , and a second through hole communicating with the outlet 201 is also defined in the mounting block 8 .

[0040] According to one embodiment of the present invention, the second type of retainer is as follows: Figure 2 As shown, the retainer includes an annular block 9 and an abutment block 10; A cavity is provided in the annular block 9, one end of the annular block 9 abuts against the abutting block 10, and the surfaces of the annular block 9 and the abutting block 10 that are away from each other are respectively a first arcuate surface and a second arcuate surface; A second through hole communicating with the outlet 201 is defined in the abutting block 10 .

[0041] Furthermore, the side of the abutment block 10 close to the annular block 9 is also configured as a rotating arc surface, which abuts tightly against each other to form a rigid seal.

[0042] Furthermore, the pressure ring 11 can be of two types: the first type: the pressure ring 11 is an annular body with a T-shaped hole opened inside; the second type: the pressure ring 11 is an annular body with a straight hole opened inside.

[0043] When the first type of pressure ring 11 is used, Figure 1 As shown, the large diameter end of the T-block 13 is brought into contact with the second impact block 7, and the pressure ring 11 is brought into contact with the inner wall of the cavity. At this time, the first type of retainer (mounting block 8) is selected, which is the first clamping structure; When the second type of pressure ring 11 is used, Figure 3 As shown, the large diameter end of the T-block 13 is abutted against the inner wall of the abutment block 10, and the pressure ring 11 is abutted against the second impact block 7. At this time, the second form of retainer (abutment block 10 and annular block 9) is selected to form the second clamping structure; When the second type of pressure ring 11 is used, Figure 3 As shown, the large diameter end of the T-block 13 is abutted against the inner wall of the cavity, and the pressure ring 11 is abutted against the second impact block 7. At this time, the first type of retainer (mounting block 8) is selected, which is the third clamping structure.

[0044] According to one embodiment of the present invention, the valve body includes a first connecting member and a second connecting member; A first groove for connecting to a first connecting member is provided on a side of the gland 1 away from the housing 2; A second groove for connecting a second connecting member is provided on a side of the housing 2 away from the gland 1; The first groove, the second chamber and one side of the second groove are respectively connected with a first leak detection port 14, a second leak detection port 15 and a third leak detection port 16.

[0045] Through the first leak detection port 14, it is possible to promptly detect whether there is material leakage between the inlet 101 and the first connecting piece. Through the second leak detection port 15, it is possible to promptly detect whether there is material leakage in the second chamber. Through the third leak detection port 16, it is possible to promptly detect whether there is material leakage between the outlet 201 and the second connecting piece.

[0046] Specifically, the first connecting member includes an externally threaded ring 17 threadedly connected to the first groove. A circular groove is formed on one end of the externally threaded ring 17 near the first groove. An internally threaded ring 18 is slidably connected to the circular groove. A first connecting tube 19 is threadedly connected to the internally threaded ring 18. When the externally threaded ring 17 is turned, the internally threaded ring 18 in the circular groove moves along the direction from the inlet 101 to the outlet 201, driven by the externally threaded ring 17, thereby driving the first connecting tube 19 to move. This arrangement ensures that when the first connecting tube 19 is connected to the inlet 101, the first connecting tube 19 will not cause wear on the inlet 101 or its end surface due to rotational force.

[0047] Furthermore, a first conical surface is provided on the inner wall of the inlet 101 near one end of the first connecting tube 19, and the diameter of the first conical surface near one end of the outlet 201 is smaller than the diameter of the other end. A second conical surface is provided on the outer wall of the first connecting tube 19 near one end of the inlet 101, and the diameter of the second conical surface near one end of the inlet 101 is smaller than the diameter of the other end. When the seal is in place, the second conical surface is in close contact with the first conical surface.

[0048] The second connecting member includes a second connecting pipe 20 , the outer wall of which is screwed to the inner wall of the second groove. When the second connecting pipe 20 is screwed into place, the end of the second connecting pipe 20 is in close contact with the outlet 201 .

[0049] Among them, the gland 1 and the shell 2 are detachably connected by a fastener 21, and the fastener 21 is a bolt. A plurality of mounting holes are provided on the gland 1, and the plurality of mounting holes are evenly spaced around the axis of the gland 1. A plurality of threaded grooves are provided on the shell 2, and the threaded grooves, mounting holes and bolts correspond to each other one by one. The bolts are passed through the mounting holes and screwed into the threaded grooves to realize the detachable connection between the shell 2 and the gland 1.

[0050] Embodiment 2: A high-pressure homogenizing device includes a microfluidic valve.

[0051] In the description of the present invention, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to connections between the internal parts of two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A microfluidic valve, characterized in that: Including valve body; The valve body comprises a shell (2) and a gland (1), wherein the shell (2) and the gland (1) are detachably connected; The gland (1) is provided with an inlet (101), the shell (2) is provided with an outlet (201), and a receiving cavity is formed between the gland (1) and the shell (2). An impact structure and a pressing structure are sequentially provided in the receiving cavity in a direction from the inlet (101) to the outlet (201); A diversion channel (3) connected to the inlet (101) is symmetrically provided on the side wall of the accommodating cavity, and the impact structure is provided with at least one group of microchannels, the microchannels including two symmetrical slits (4), the inlet ends of the two slits (4) are both connected to the diversion channel (3), and the outlet ends of the two slits (4) are opposite to each other; The compression structure is provided with a circulation channel, and both ends of the circulation channel are respectively connected to the microchannel and the outlet (201).

2. A microfluidic valve according to claim 1, characterized in that: The accommodating chamber includes a first chamber and a second chamber, wherein the first chamber has a first side wall and a second side wall connected to each other. The diversion channel (3) comprises a first guide groove (301) and a second guide groove (302); The first side wall is provided with the first guide groove (301), and the second side wall is provided with the second guide groove (302); The first guide groove (301) and the second guide groove (302) are arranged vertically, and the first guide groove (301) and the second guide groove (302) are connected to each other to form the diversion channel (3).

3. A microfluidic valve according to claim 2, characterized in that: The impact structure comprises a first impact block (6) and a second impact block (7) that are in contact with each other; A first impact groove (601) and a second impact groove (602) are respectively formed at both ends of the first impact block (6); Therefore, the microchannels are provided on both end faces of the first impact block (6), and the end thereof away from the second impact block (7) abuts against the first side wall; An annular groove (5) is provided on the second side wall, and the diversion channel (3) is connected to the slit (4) through the annular groove (5); The second impact block (7) is provided with a first through hole (701), and the first through hole (701), the second impact groove (602) and the slit (4) are interconnected.

4. A microfluidic valve according to claim 3, characterized in that: The pressing structure includes a retaining frame and a pressing member, the impact structure is arranged in the first chamber, and the retaining frame is arranged in the second chamber; The circulation channel includes a second through hole opened in the retainer, and a cavity connected to the second through hole is provided in the retainer. One end of the pressing member abuts against the side wall of the cavity, and the other end abuts against the impact structure.

5. The microfluidic valve according to claim 4, characterized in that: The two ends of the retainer respectively have a first arcuate surface and a second arcuate surface; The second chamber has a first arcuate wall and a second arcuate wall opposite to each other; The first arcuate surface abuts against the first arcuate wall, and the second arcuate surface abuts against the second arcuate wall.

6. The microfluidic valve according to claim 5, characterized in that: The retaining frame comprises a mounting block (8), and both end surfaces of the mounting block (8) are the first arcuate surface and the second arcuate surface respectively; The cavity is provided in the mounting block (8), and the second through hole connected to the outlet (201) is also provided in the mounting block (8).

7. The microfluidic valve according to claim 5, characterized in that: The retainer comprises an annular block (9) and an abutment block (10); The cavity is provided in the annular block (9), one end of the annular block (9) abuts against the abutting block (10), and the surfaces of the annular block (9) and the abutting block (10) that are away from each other are the first arcuate surface and the second arcuate surface respectively; The abutment block (10) is provided with a second through hole connected to the outlet (201).

8. The microfluidic valve according to claim 4, characterized in that: The pressing member comprises a pressing ring (11), a T-shaped block (13) and a spring (12); The pressure ring (11) and the spring (12) are sleeved on the T-shaped block (13); One end of the spring (12) is connected to the T-shaped block (13), and the other end is connected to the pressure ring (11); A third through hole is provided on the T-shaped block (13), and the first through hole (701), the third through hole and the second through hole are connected in sequence.

9. The microfluidic valve according to claim 2, characterized in that: The valve body includes a first connecting member and a second connecting member; A first groove for connecting to the first connecting member is provided on a side of the gland (1) away from the housing (2); A second groove for connecting the second connecting member is provided on a side of the housing (2) away from the gland (1); The first groove, the second chamber and one side of the second groove are respectively connected to a first leak detection port (14), a second leak detection port (15) and a third leak detection port (16).

10. A high-pressure homogenization device, characterized in that: A microfluidic valve comprising any one of claims 1-9.

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