Micro-aperture fluid valve and valve cover component thereof

Abstract

The utility model provides a micro-aperture fluid valve and a valve cover component thereof, and relates to the technical field of micro-aperture fluid valves. The valve cover component comprises a cover body and at least one first flow channel, wherein the cover body is provided with a first sealing surface and a first connecting surface, and the first flow channel is communicated with the first sealing surface and the first connecting surface. The first flow channel comprises a first fluid hole vertically formed in the first sealing face and a first connecting hole formed in the first connecting face. The first fluid hole is communicated with the first connecting hole. The diameter of the first fluid hole is smaller than that of the first connecting hole. And the first connecting hole is obliquely arranged relative to the first fluid hole. And an included angle A between the first fluid hole and the first connecting hole is 90-150 degrees. According to the valve cover component, through the first fluid hole perpendicular to the first sealing face and the first connecting hole which is obliquely formed, the position precision of the fluid hole can be greatly improved, and the fluid hole dislocation problem caused by errors is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of micro aperture fluid valve, specifically, a micro aperture fluid valve and valve cover component thereof. BACKGROUND

[0002] As a key component in the field of microfluidics, micro aperture fluid valve realizes the precise control of micro fluid with its unique micro aperture inner hole flow path design. However, despite its broad application prospects, the manufacturing technology of existing micro aperture fluid valve faces many challenges.

[0003] At present, the micro aperture fluid valve widely used in the market is mainly processed through direct inclined drilling process, aiming to be connected with standard screw holes. However, this processing method has significant precision problems. Due to the inevitable dimensional error in the processing process, combined with the slight deviation of the machine itself and the cumulative error in the subsequent product assembly process, the fluid valve often fails to achieve the ideal performance in actual application.

[0004] Especially in the case of extremely small inner hole flow path, the cumulative effect of these errors is particularly significant. When the fluid valve switches fluid, it is prone to misalignment. Light causes partial aperture blockage, and heavy completely blocks the fluid passage. This blockage not only directly affects the flow control accuracy of the fluid valve, such as the fluctuation of CV value (flow coefficient), but also causes the dramatic change of instantaneous pressure inside the system, which poses a serious threat to the stability and reliability of the product.

[0005] Therefore, in order to overcome the deficiencies of existing micro aperture fluid valve in processing and application, improve the precision and reliability of the fluid valve, it is urgent to develop a new processing technology or optimize the existing process to reduce error accumulation and ensure the smooth operation of the fluid valve in the microfluidic system. UTILITY MODEL CONTENT

[0006] The utility model provides a kind of micro aperture fluid valve and valve cover component thereof, to improve at least one of the above technical problems.

[0007] In the first aspect, the utility model provides a kind of valve cover component of micro aperture fluid valve, it includes the cover body being provided with first sealing surface and first connecting face, and at least one first flow channel being communicated with the first sealing surface and the first connecting face.The first flow channel includes the first fluid hole being vertically arranged in the first sealing surface and the first connecting hole being arranged in the first connecting face.The first fluid hole is communicated with the first connecting hole.The diameter of the first fluid hole is less than the first connecting hole.

[0008] The first connecting hole is inclinedly arranged relative to the first fluid hole.The included angle A between the first fluid hole and the first connecting hole is 90 to 150 degrees.

[0009] In an alternative embodiment, the valve cover member further comprises a flow channel connector. The flow channel connector is provided with a second sealing surface capable of engaging the first sealing surface, and a second flow channel provided on the second sealing surface. The second flow channel is configured to communicate with the first flow channel. The second flow channel and the first flow channel are in one-to-one correspondence.

[0010] In an alternative embodiment, the cover body is further provided with a third flow channel. The third flow channel comprises a second fluid hole vertically provided on the first sealing surface, and a second connecting hole in communication with the second fluid hole. The second fluid hole and the second connecting hole are coaxially or parallelly arranged.

[0011] The flow channel connector further comprises a fourth flow channel provided on the second sealing surface. The fourth flow channel is configured to communicate with the third flow channel.

[0012] In an alternative embodiment, the cover body is further provided with a first mating hole in communication with the first connecting hole and the first fluid hole, the diameter of the first mating hole being greater than that of the first fluid hole and less than that of the first connecting hole.

[0013] In an alternative embodiment, the cover body is further provided with a second mating hole in communication with the second connecting hole and the second fluid hole, the diameter of the second mating hole being greater than that of the second fluid hole and less than that of the second connecting hole.

[0014] In an alternative embodiment, the diameter of the first fluid hole and / or the second fluid hole is 0.1 to 0.5 mm. The diameter of the first mating hole and / or the second mating hole is 1 mm to 1 cm.

[0015] In an alternative embodiment, the first connecting hole and / or the second connecting hole is provided as a threaded hole.

[0016] In an alternative embodiment, the cover body further comprises a second connecting surface. The second connecting surface is parallel to the first sealing surface. The second connecting hole is provided on the second connecting surface.

[0017] In an alternative embodiment, the cover body is provided with a plurality of first flow channels. The plurality of first flow channels are uniformly distributed circumferentially.

[0018] In an alternative embodiment, the first connecting surface is configured as a circular truncated cone side curve.

[0019] In an alternative embodiment, the number of first flow channels is even.

[0020] The application further provides a micro-orifice fluid valve comprising the valve cover member of any one of the first aspect, a valve body engaged with the valve cover member, and a valve core member rotatably engaged with the valve body. The valve core member is adapted to switch the connection state and / or the communication state of the first flow channel.

[0021] In an optional embodiment, the cover body is detachably engaged with the valve body by fasteners. The cover body and the valve body are positioned by positioning pins.

[0022] By adopting the technical scheme, the following technical effects can be achieved:

[0023] The valve cover member of the micro-orifice fluid valve can greatly improve the position precision of the fluid hole, avoid misplacement caused by errors, and has good practical significance. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the specific embodiments of the application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0025] Figure 1 is a bottom view of the cover body.

[0026] Figure 2 is a half-sectional view of the cover body.

[0027] Figure 3 is a top view of the cover body.

[0028] Figure 4 is an exploded view of the micro-orifice fluid valve from a first perspective.

[0029] Figure 5 is an exploded view of the micro-orifice fluid valve from a second perspective.

[0030] Markings in the figure: 1-second connecting hole, 2-second connecting surface, 3-first connecting hole, 4-first connecting surface, 5-sealing surface, 6-first butt joint hole, 7-first fluid hole, 8-second butt joint hole, 9-second fluid hole, 10-cover body, 11-flow channel connecting piece, 12-valve core member, 13-valve body, 14-fourth flow channel, 15-second flow channel, 16-second sealing surface. DETAILED DESCRIPTION

[0031] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] Embodiment one, by Figures 1 to 5 As shown in the figure, the utility model embodiment provides a valve cover component of micro aperture flow valve, it includes the cover body 10 that is provided with first sealing surface 5 and first connecting surface 4, and at least one first flow channel that communicates first sealing surface 5 with first connecting surface 4. The first flow channel includes the first fluid hole 7 vertically arranged in the first sealing surface 5 and the first connecting hole 3 arranged in the first connecting surface 4. The first fluid hole 7 is communicated with the first connecting hole 3. The diameter of the first fluid hole 7 is less than the first connecting hole 3.

[0033] The first connecting hole 3 is obliquely arranged relative to the first fluid hole 7. The included angle A between the first fluid hole 7 and the first connecting hole 3 is 90 to 150 degrees. Preferably, the included angle A is 135 degrees.

[0034] The micro aperture flow valve has a small-bore inner hole flow path, such as a 0.1-0.5mm inner hole flow path. The sample inlet hole (0.1-0.5mm) of the existing micro aperture flow valve is directly inclined to drill, and is connected to a 1.6mm hole. The normal error is 0.03-0.05mm. Especially, if the machining error of a 0.1mm inner hole is 0.05mm, it will basically block half of the hole, causing the CV value to be different, the instantaneous pressure to be different, and the product to be greatly affected. In addition, due to the machining size error, the machine itself error, and the product assembly cumulative error, it may even cause the hole to be blocked.

[0035] The valve cover component of the micropore flow valve directly processes the sample inlet hole 0.1-0.5mm vertically, and synchronously processes the butt joint hole 1.6mm and the 21.5 stopper, so that the position deviation of the sample inlet hole is controlled within 0.01mm, the position precision of the fluid hole is greatly improved, and the misplacement problem caused by error can be well avoided.

[0036] On the basis of the above-mentioned embodiments, an optional embodiment of the utility model for example as shown in the figure, Figures 1 to 3 The third flow channel includes a second fluid hole 9 vertically arranged on the first sealing surface 5, and a second connecting hole 1 communicated with the second fluid hole 9.

[0037] On the basis of the above-mentioned embodiments, an optional embodiment of the utility model for example as shown in the figure, Figure 4 And Figure 5 The valve cover component further includes a flow channel connecting piece 11. The flow channel connecting piece 11 is provided with a second sealing surface 16 capable of being jointed to the first sealing surface 5, a second flow channel 15 arranged on the second sealing surface 16, and a fourth flow channel 14 arranged on the second sealing surface 16. The second flow channel 15 is used to communicate the first flow channel. The second flow channel 15 hole and the first flow channel one-to-one correspondence. The fourth flow channel 14 is used to communicate the third flow channel. Preferably, the first sealing surface 5 can be sealed and jointed to the second sealing surface 16. In this embodiment, the cover body 10 is provided with a third flow channel, and the flow channel connecting piece 11 is provided with a corresponding fourth flow channel 14. In other embodiments, the third flow channel and the fourth flow channel 14 can not be provided, and the utility model does not make specific limitation to this.

[0038] Specifically, the flow channel connecting piece 11 adopts a more wear-resistant material than the cover body 10 to contact the valve core, and the flow channel connecting piece 11 and the valve core are rubbed when the valve core rotates, thereby prolonging the service life of the valve. In other embodiments, the flow channel connecting piece 11 can not be provided, and the cover body 10 is directly contacted with the valve core, and the utility model does not make specific limitation to this.

[0039] On the basis of the above-mentioned embodiments, an optional embodiment of the utility model for example as shown in the figure, Figure 2As shown, the cover 10 is further provided with a first counterbore 6 communicating the first connecting hole 3 and the first fluid hole 7, the diameter of the first counterbore 6 is greater than that of the first fluid hole 7 and less than that of the first connecting hole 3. The cover 10 is further provided with a second counterbore 8 communicating the second connecting hole 1 and the second fluid hole 9, the diameter of the second counterbore 8 is greater than that of the second fluid hole 9 and less than that of the second connecting hole 1. Preferably, the diameter of the first fluid hole 7 and / or the second fluid hole 9 is 0.1 to 0.5 mm. The diameter of the first counterbore 6 and / or the second counterbore 8 is 1 mm to 1 cm. It should be noted that when the third flow channel and the fourth flow channel 14 are not provided, the second counterbore 8 is also not required.

[0040] In the embodiment, the first connecting hole 3 and / or the second connecting hole 1 is provided as a threaded hole. Preferably, the threaded hole is of 10-31-UNC or 1 / 4-28-UNC or the like. The connecting hole is used to connect a pipe joint of an external pipeline, and the fluid hole is used to switch inside the valve body 13. The connecting hole and the fluid hole are communicated through the counterbore, and since the diameter of the counterbore is smaller than that of the connecting hole, the distance between the holes can be made smaller, thereby effectively reducing the distance between the plurality of first fluid holes 7.

[0041] On the basis of the above embodiment, an alternative embodiment of the utility model is shown in Figure 2 and Figure 4 The first connecting surface 4 is configured as a circular truncated side surface. The cover 10 further comprises a second connecting surface 2. The second connecting surface 2 is parallel to the first sealing surface 5. The second connecting hole 1 is arranged on the second connecting surface 2. In other embodiments, the first connecting surface 4 can be configured as a spherical surface, and the second connecting surface 2 is not required. The first connecting surface 4 can also be configured as a plurality of inclined flat surfaces, and the utility model does not make specific limitations in this regard.

[0042] As shown in Figures 1 to 5 The cover 10 is provided with eight first flow channels. The eight first flow channels are arranged in a circumferentially uniform manner around the second flow channel 15. In other embodiments, the number of first flow channels can be set to other numbers, and the distribution position can also be set according to actual needs, and the utility model does not make specific limitations in this regard.

[0043] In the second embodiment, the micro-orifice fluid valve comprises the valve cover member of any one of the first embodiment, the valve body 13 connected to the valve cover member, and the valve core member 12 rotatably connected to the valve body 13. The valve core member 12 is adapted to switch the connection state and / or the communication state of the first flow channel. Preferably, the cover body 10 is detachably connected to the valve body 13 by fasteners. The cover body 10 and the valve body 13 are positioned by positioning pins.

[0044] Specifically, the connection state refers to the connection state between different flow channels. The communication state refers to the cut-off or communication state of the flow channel. In the embodiment, as shown in the figure, the third flow channel is provided with a groove for connecting the second fluid hole 9 to any one of the first fluid holes 7. In other embodiments, the third flow channel can be omitted, and the groove can be inclined to connect two first fluid holes 7 at a specified angle, or the groove can be changed into a flow channel to connect any one or more first fluid holes 7 to other flow channels by rotating the valve core member 12. It should be noted that the structure of the valve core member 12 can be set by those skilled in the art according to actual needs, and the utility model does not make specific limitations on this. Figure 4

[0045] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.​

Claims

1. A valve cover member for a micro-pore flow valve, characterized by, The valve cover member comprises a cover body (10) provided with a first sealing surface (5) and a first connecting surface (4), and at least one first flow channel communicating the first sealing surface (5) and the first connecting surface (4); the first flow channel comprises a first fluid hole (7) vertically arranged on the first sealing surface (5) and a first connecting hole (3) arranged on the first connecting surface (4); the first fluid hole (7) is communicated with the first connecting hole (3); the diameter of the first fluid hole (7) is smaller than that of the first connecting hole (3); The first connecting hole (3) is arranged obliquely relative to the first fluid hole (7); the included angle A between the first fluid hole (7) and the first connecting hole (3) is 90-150 degrees.

2. A bonnet member for a micro-pore flow valve according to claim 1, wherein, The valve cover member further comprises a flow channel connector (11); the flow channel connector (11) is provided with a second sealing surface (16) capable of being engaged with the first sealing surface (5), and a second flow channel (15) arranged on the second sealing surface (16); the second flow channel (15) is used to communicate the first flow channel; the second flow channel (15) hole and the first flow channel one-to-one correspond.

3. A bonnet member for a micro-pore fluid valve according to claim 2, wherein, The cover body (10) is further provided with a third flow channel; the third flow channel comprises a second fluid hole (9) vertically arranged on the first sealing surface (5), and a second connecting hole (1) communicated with the second fluid hole (9); the second fluid hole (9) and the second connecting hole (1) are coaxially arranged or arranged in parallel; The flow channel connector (11) further comprises a fourth flow channel (14) arranged on the second sealing surface (16); the fourth flow channel (14) is used to communicate the third flow channel.

4. A bonnet member for a micro-pore fluid valve according to claim 3, wherein, The cover body (10) is further provided with a first butt joint hole (6) communicating the first connecting hole (3) and the first fluid hole (7), the diameter of the first butt joint hole (6) is greater than that of the first fluid hole (7) and smaller than that of the first connecting hole (3), and / or the cover body (10) is further provided with a second butt joint hole (8) communicating the second connecting hole (1) and the second fluid hole (9), the diameter of the second butt joint hole (8) is greater than that of the second fluid hole (9) and smaller than that of the second connecting hole (1).

5. A bonnet member for a micro-pore fluid valve according to claim 4, wherein, The diameter of the first fluid hole (7) and / or the second fluid hole (9) is 0.1-0.5 mm; the diameter of the first butt joint hole (6) and / or the second butt joint hole (8) is 1 mm to 1 cm.

6. A bonnet member for a micro-pore fluid valve according to claim 3, wherein, The first connecting hole (3) and / or the second connecting hole (1) is arranged as a threaded hole; The cover body (10) further comprises a second connecting surface (2); the second connecting surface (2) is parallel to the first sealing surface (5); the second connecting hole (1) is arranged on the second connecting surface (2).

7. A bonnet member for a micro-pore fluid valve according to any one of claims 1 to 6, wherein The cover body (10) is provided with a plurality of first flow channels; the plurality of first flow channels are uniformly distributed circumferentially; The first connecting surface (4) is configured as a circular truncated cone side curved surface.

8. A bonnet member for a micro-pore fluid valve according to claim 7, wherein, The number of the first flow channels is even.

9. A micro-pore fluidic valve characterized by, A valve cover member comprising a micro-pore fluid valve according to any one of claims 1 to 8, a valve body (13) engaged to said valve cover member, and a valve core member (12) rotatably engaged to said valve body (13); said valve core member (12) is adapted to switch the connection state and / or the communication state of said first flow passage.

10. A micro-orifice fluid valve as defined in claim 9, wherein, Said cover body (10) is detachably engaged to said valve body (13) by fasteners; Said cover body (10) and said valve body (13) are positioned by positioning pins.

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