A microfluidic chip clamping device for carbon dioxide geological storage technology

Abstract

This invention relates to the field of carbon dioxide geological storage technology, and discloses a microfluidic chip clamping device for carbon dioxide geological storage technology, including a base, an adapter, and a cover. The base has an assembly groove; the adapter is disposed within the assembly groove; the adapter has a slot for placing a microfluidic chip; the cover closes onto the base to press the adapter firmly; several adapters are provided, each with a different size slot. By selecting appropriate adapters between the base and the cover, microfluidic chips of different sizes can be assembled, increasing the usability of the clamping device to meet various application needs.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide geological storage technology, and in particular to a microfluidic chip clamping device for carbon dioxide geological storage technology. Background Technology

[0002] Geological carbon sequestration (CCS) is a technology that captures and stores carbon dioxide generated during industrial or energy production processes in underground geological structures for long-term storage. Its aim is to reduce the concentration of greenhouse gases in the atmosphere and mitigate climate change. During the research and improvement phase, CCS technology requires repeated testing to optimize storage efficiency and safety. Because the high-temperature, high-pressure environment underground differs from the ambient temperature environment on the surface, microfluidic chips are typically fixed in place using clamps for simulation. By adjusting the channel size, shape, and connectivity of the microfluidic chip, geological conditions with different permeabilities and porosities can be simulated, allowing for the study of the interaction between carbon dioxide and formation water. This provides crucial scientific support for the transition of sequestration technology from the laboratory to field applications.

[0003] However, common clamps used for microfluidic chips are only suitable for conventional room temperature and atmospheric pressure experimental environments, and their complex structure usually requires multiple bolts for connection. They can only fix microfluidic chips of specific sizes and cannot meet the needs of multiple scenarios.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a microfluidic chip clamping device for carbon dioxide geological storage technology, which aims to solve the problems that existing microfluidic chip clamps are inconvenient to operate and cannot adapt to the usage requirements of various microfluidic chips.

[0006] The technical solution of the present invention is as follows:

[0007] A microfluidic chip clamping device for carbon dioxide geological storage technology, comprising:

[0008] A base having an assembly groove formed thereon;

[0009] An adapter is disposed within the assembly slot; the adapter is provided with a slot for placing a microfluidic chip;

[0010] A cover, which fits onto the base, is used to press the adapter in place;

[0011] The adapter is provided in several parts, and the size of the card slot on each adapter is different.

[0012] The microfluidic chip clamping device for carbon dioxide geological storage technology includes a slot located on the bottom surface of the adapter; an observation hole on the adapter communicating with and above the slot; an observation window on the cover facing the observation hole; and a bottom through hole on the base facing the observation hole.

[0013] The observation window, the observation hole, the card slot, and the bottom through hole are arranged sequentially along a straight line.

[0014] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein the cross-sectional area of ​​the observation hole is smaller than the cross-sectional area of ​​the slot; a top support platform is formed on the side of the slot connected to the observation hole;

[0015] The cross-sectional area of ​​the bottom through hole is smaller than the cross-sectional area of ​​the slot; the bottom surface of the assembly slot forms a bottom support platform;

[0016] When the cover squeezes the adapter, the top support platform and the bottom support platform move closer to each other to clamp the microfluidic chip.

[0017] The microfluidic chip clamping device for carbon dioxide geological storage technology includes a first interface and a second interface on the bottom support platform; the first interface is used to connect to the fluid inlet of the microfluidic chip, and the second interface is used to connect to the fluid outlet of the microfluidic chip; a third interface and a fourth interface are respectively provided on the side walls of both sides of the base; a first fluid channel and a second fluid channel are formed inside the base; the first fluid channel connects the first interface and the third interface; the second fluid channel connects the second interface and the fourth interface.

[0018] The microfluidic chip clamping device includes two fluid inlet / outlet connectors, one of which is screwed to the third interface, and the other of which is screwed to the fourth interface;

[0019] The observation window and the observation hole are connected in a first direction, and the fluid inlet / outlet connector includes a connecting pipe arranged perpendicular to the first direction, which is used to introduce or export fluid.

[0020] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein a first mounting groove is provided around the first interface; and a second mounting groove is provided around the second interface.

[0021] The microfluidic chip clamping device includes a first sealing ring and a second sealing ring, wherein the first sealing ring is disposed in the first mounting groove and the second sealing ring is disposed in the second mounting groove.

[0022] The microfluidic chip clamping device for carbon dioxide geological storage technology includes a positioning pin protruding from the bottom surface of the assembly groove and a positioning hole on the adapter; the positioning hole is used to insert the positioning pin.

[0023] The microfluidic chip clamping device for carbon dioxide geological storage technology is described above, wherein the adapter is provided with a magnetic component, and the magnetic component is magnetically connected to the base.

[0024] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein the top surface of the adapter is provided with a side groove, and the side wall or bottom wall of the side groove is provided with a plug-in groove for inserting a prying tool.

[0025] The edge groove and the magnetic component are arranged opposite each other on both sides of the adapter.

[0026] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein a bushing is provided on one side of the base and a bayonet is provided on the other side;

[0027] The cover includes a cover plate and a fastening clamp. One side of the cover plate is hinged to the bushing via a shaft, and the fastening clamp is provided on the other side of the cover plate. The middle part of the fastening clamp is connected to the cover plate via a pin. One end of the fastening clamp is provided with a beveled buckle, which is used to engage with the latch. The other end of the fastening clamp is provided with a compression spring, which abuts against the cover plate and is used to push the fastening clamp.

[0028] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein the base is any one of an iron alloy base, a nickel-based alloy base, a titanium alloy base, or a tantalum-tungsten alloy base.

[0029] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0030] The microfluidic chip clamping device disclosed in this invention uses multiple adapters to hold the microfluidic chip. The adapter model is selected based on the size of the microfluidic chip used in the current experiment. The adapter is assembled on a base, with one side of the cover hinged to the base and the other side rotatable to the top of the base and connected thereto, achieving a tight fit between the cover and the base. Furthermore, the adapter is pressed by the cover, firmly securing the microfluidic chip to the base for testing. Therefore, the microfluidic chip clamping device disclosed in this invention has a simple structure, convenient adapter assembly and disassembly, and is applicable to various testing scenarios, meeting different usage requirements. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the microfluidic chip clamping device used in carbon dioxide geological storage technology in this invention;

[0033] Figure 2 for Figure 1 Cross-sectional view along the AA' direction;

[0034] Figure 3 This is an exploded view of the microfluidic chip clamping device used in carbon dioxide geological storage technology in this invention.

[0035] Figure 4 This is a schematic diagram of the adapter and microfluidic chip from another angle in this invention;

[0036] Figure 5 This is a cross-sectional view of the base in this invention.

[0037] Among them, 10. Base; 11. Assembly slot; 111. Positioning pin; 12. Bottom through hole; 13. Bottom support platform; 131. First interface; 1311. First mounting slot; 132. Second interface; 1321. Second mounting slot; 14. Third interface; 15. Fourth interface; 16. First fluid channel; 17. Second fluid channel; 18. Bushing; 19. Bayonet; 20. Adapter; 21. Slot; 22. Observation hole; 2 3. Top support platform; 24. Positioning hole; 25. Magnetic component; 26. Edge groove; 30. Cover; 31. Observation window; 32. Cover plate; 33. Fastening clamp; 331. Pin; 332. Angled latch; 333. Compression spring; 34. Shaft; 40. Microfluidic chip; 41. Fluid inlet; 42. Fluid outlet; 50. Fluid inlet / outlet connector; 51. Connecting pipeline; 60. First sealing ring; 70. Second sealing ring. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0040] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0041] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0042] For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to encompass not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways, and the spatial relational terms used herein will be interpreted accordingly.

[0043] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0044] A microfluidic chip is an integrated experimental platform that precisely manipulates microfluidics (nanoliths to microliters) at the micrometer scale (typically with channel widths of 10–500 micrometers), also known as a "lab-on-a-chip." Its core principle is to construct microchannels, reaction chambers, valves, and other structures on chip materials using microfabrication techniques, achieving precise control over fluid movement, mixing, separation, or reactions. Microfluidic chips have a wide range of applications, and are gradually being used in environmental monitoring. In carbon dioxide geological storage technology, microfluidic chips allow direct observation of fluid flow patterns within microchannels, enabling visualization and facilitating intuitive acquisition of experimental results.

[0045] However, the testing process for geological sequestration technology requires simulating the high-temperature and high-pressure environment at depths of 800-1000 meters underground. Furthermore, the environment varies significantly depending on the depth, necessitating the use of different types of microfluidic chips to simulate various underground environments. Currently, the clamping structures used to hold the microfluidic chips during testing are rigid, making it difficult to accommodate multiple microfluidic chips in a one-to-many configuration, and they are unsuitable for high-temperature and high-pressure environments. Therefore, embodiments of this application disclose a microfluidic chip clamping device for carbon dioxide geological sequestration technology to adapt to various testing scenarios.

[0046] See Figure 1 , Figure 3 and Figure 4In one embodiment of this invention application, a microfluidic chip clamping device for carbon dioxide geological storage technology is disclosed, comprising a base 10, an adapter 20, and a cover 30. The base 10 has an assembly groove 11 formed thereon; the adapter 20 is disposed in the assembly groove 11; the adapter 20 has a slot 21 for placing a microfluidic chip 40; the cover 30 covers the base 10 and is used to press the adapter 20; there are a plurality of adapters 20, and the size of the slot 21 on each adapter 20 is different.

[0047] The microfluidic chip clamping device disclosed in this embodiment uses multiple adapters 20 to hold the microfluidic chip 40. The adapter 20 is selected according to the size of the microfluidic chip 40 used in the current test. The adapter 20 is assembled on the base 10. One side of the cover 30 is hinged to the base 10, and the other side can rotate to the top of the base 10 and connect to it, achieving a tight fit between the cover 30 and the base 10. Furthermore, the adapter 20 is pressed by the cover 30, firmly securing the microfluidic chip 40 to the base 10 for testing. At the end of the test, one side of the cover 30 can be detached from the base 10, allowing the cover 30 to rotate freely and separate from the base 10. After opening the assembly slot 11, the adapter 20 can be removed for quick and convenient replacement of the microfluidic chip 40.

[0048] Specifically, in the application of carbon dioxide geological storage technology, the microfluidic chip 40 disclosed in this embodiment is a chemically bonded silicon-based microfluidic chip, made of silicon material, which has a certain pressure resistance and has the advantages of high stability and long service life. The microfluidic chip 40 is assembled in the adapter 20 and can be used normally under the clamping state of the cover 30 and the base 10.

[0049] As can be seen, the microfluidic chip clamping device disclosed in this embodiment has a simple structure, the adapter 20 is easy to install and remove, and it can be applied to a variety of test scenarios to meet different usage requirements.

[0050] It should be noted that the dimensions of the slots 21 on the different adapters 20 disclosed in this embodiment are different, but the dimensions of the outer edges of the different adapters 20 are the same. For example, the adapters 20 are all set to be 3 cm long, 1 cm wide, and 0.5 cm high, but different adapters 20 can be provided with slots 21 with lengths of 1 cm, 1.5 cm, or 2 cm, and the width of the slots 21 can also be set to 0.5 cm, 0.6 cm, or 0.8 cm. According to the dimensions of the slots 21, multiple adapters 20 can be numbered, and then selected according to the dimensions of the microfluidic chip 40 used in the experiment, so that the shape of the microfluidic chip 40 matches the shape of the slot 21. Preferably, the sidewall of the slot 21 contacts the sidewall of the microfluidic chip 40, thereby constraining the microfluidic chip 40, preventing the microfluidic chip 40 from shaking, improving the stability of the device, and facilitating observation.

[0051] It should also be noted that the size parameters of the adapter 20 disclosed in this embodiment are all examples and not exhaustive. In other alternative solutions of this application, as long as the size of the adapter 20 is appropriate, it can achieve the technical effect disclosed in this application. As equivalent replacements of the inventive concept, they should also be within the scope of protection of this application.

[0052] Specifically, in another embodiment of this invention, the height of the adapter 20 can be set to be equal to the depth of the mounting groove 11, or the height of the adapter 20 can be slightly greater than the depth of the mounting groove 11. That is, the adapter 20 is placed in the mounting groove 11, with its top surface flush with the opening of the mounting groove 11, or protruding beyond the opening of the mounting groove 11. When the cover 30 is rotated to fit the base 10, the cover 30 completely covers the column mounting groove 11. At this time, the cover 30 contacts the top surface of the adapter 20, thus limiting the position of the adapter 20.

[0053] In summary, the adapter 20 is held in place by the cover 30 and the base 10, which keeps it stable and improves the stability of the microfluidic chip 40, making it easier to observe and experiment.

[0054] Specifically, the adapter 20 is used to support the microfluidic chip 40 and requires a certain structural strength. When clamped by the cover 30 and the base 10, the adapter 20 needs to have a certain resistance to compression. At the same time, the adapter 20 also needs to be able to withstand high temperature and high pressure environments, generally requiring at least 1 MPa of pressure, and to remain stable in an environment of at least 0°C to 70°C, in order to match the experimental requirements of carbon dioxide encapsulation technology.

[0055] In another embodiment of this invention, the adapter 20 is disclosed to be made of rubber, metal, or polyetheretherketone (PEEK). Rubber is flexible, structurally stable, and has a long service life; metals, such as stainless steel 316 and nickel-based alloys, have good resistance to extrusion; and PEEK also has good stability and can withstand high temperature and high pressure environments. Therefore, in this embodiment, the adapter 20 is manufactured using rubber, metal, or PEEK materials, enabling it to meet the testing environment requirements in the field of carbon dioxide geological storage.

[0056] It should be noted that this embodiment is only an example of the manufacturing materials of the adapter 20, but it is not limited to this. Other types of adapters 20, as long as they can achieve the technical effects disclosed in this application, can be used as equivalent replacements for the inventive concept and should also be within the scope of protection of this application.

[0057] Specifically, as another embodiment of this application, the base 10 is disclosed to be any one of an iron alloy base, a nickel-based alloy base, a titanium alloy base, or a tantalum-tungsten alloy base. The base 10, made of a metal alloy material, has advantages such as high structural strength, good compressive strength, high temperature resistance, and long service life. Furthermore, the base 10 made of metal material has high thermal conductivity, which facilitates the rapid transfer of heat from the surrounding environment to the assembly groove 11, allowing the microfluidic chip 40 to reach the experimental temperature more quickly and meet the experimental requirements.

[0058] In addition, both the base 10 and the adapter 20 disclosed in this embodiment can be made of magnetic materials, so that an attraction can be generated between the base 10 and the adapter 20 to increase the stability of the assembly of the adapter 20 and the base 10, and further improve the stability of the microfluidic chip 40.

[0059] Furthermore, in this embodiment, the cover 30 is hinged to the base 10. The cover 30 can be made of the same material as the base 10 to save production costs. At the same time, both the cover 30 and the base 10 are made of metal, which increases the fit during contact and also enhances the overall device's high-temperature and pressure resistance, meeting the application requirements in the field of carbon dioxide geological storage.

[0060] like Figure 1 , Figure 2 and Figure 3As shown, in another embodiment of this application, the card slot 21 is provided on the bottom surface of the adapter 20; the adapter 20 is provided with an observation hole 22, which communicates with the card slot 21 and is located above the card slot 21; the cover 30 is provided with an observation window 31 opposite to the observation hole 22; the base 10 is provided with a bottom through hole 12 opposite to the observation hole 22; the observation window 31, the observation hole 22, the card slot 21 and the bottom through hole 12 are arranged sequentially in a straight line.

[0061] The microfluidic chip clamping device disclosed in this embodiment is used in carbon dioxide geological storage technology. Its purpose is to visualize the experimental process simulated by the microfluidic chip 40. Therefore, an observation hole 22 and an observation window 31 are provided to facilitate observation of the microfluidic chip 40 from above the cover 30. Simultaneously, if a double-sided transparent microfluidic chip 40 is used for the experiment, a light source can be added, allowing light to enter from the bottom through-hole 12 to illuminate the microfluidic chip 40, making the conditions within the microchannels clearer. In another embodiment, if a single-sided transparent microfluidic chip 40 is used for the experiment, light can be shone through the observation window 31, which also allows for clear observation of the microfluidic chip 40.

[0062] Specifically, in this embodiment, the observation window 31, observation hole 22, card slot 21 and bottom through hole 12 extend in a straight line. Therefore, whether light is injected from the bottom or from the top, the brightness inside the assembly slot 11 can be increased, and the reflected light can be emitted from the observation window 31 to clearly show the condition inside the microfluidic chip 40.

[0063] like Figure 3 and Figure 4 As shown, in another embodiment of this application, the cross-sectional area of ​​the observation hole 22 is smaller than the cross-sectional area of ​​the slot 21; a top support platform 23 is formed on the side of the slot 21 connected to the observation hole 22; the cross-sectional area of ​​the bottom through hole 12 is smaller than the cross-sectional area of ​​the slot 21; a bottom support platform 13 is formed on the bottom surface of the assembly groove 11; when the cover 30 presses the adapter 20, the top support platform 23 and the bottom support platform 13 move closer to each other to clamp the microfluidic chip 40.

[0064] The microchannels on the microfluidic chip 40 are generally located in the middle, while the edges are provided with liquid inflow or outflow ports. Therefore, in this embodiment, the observation hole 22 and the bottom through hole 12 are preferably coaxially arranged with the microfluidic chip 40. At this time, the top support platform 23 surrounding the edge of the observation hole 22 contacts the edge of the microfluidic chip 40, and the bottom support platform 13 surrounding the edge of the bottom through hole 12 also contacts the edge of the microfluidic chip 40. By applying pressure to both sides of the microfluidic chip 40 simultaneously through the top support platform 23 and the bottom support platform 13, the microfluidic chip 40 is clamped, thus fixing the position of the microfluidic chip 40, improving the stability of the device, and facilitating observation.

[0065] like Figure 3 and Figure 5 As shown in another embodiment of this application, the bottom support platform 13 is provided with a first interface 131 and a second interface 132; the first interface 131 is used to connect to the fluid inlet 41 of the microfluidic chip 40, and the second interface 132 is used to connect to the fluid outlet 42 of the microfluidic chip 40; a third interface 14 and a fourth interface 15 are respectively provided on the side walls on both sides of the base 10; a first fluid channel 16 and a second fluid channel 17 are formed in the base 10; the first fluid channel 16 connects the first interface 131 and the third interface 14; the second fluid channel 17 connects the second interface 132 and the fourth interface 15. The microfluidic chip clamping device includes two fluid inlet / outlet connectors 50. One fluid inlet / outlet connector 50 is screwed to the third interface 14, and the other fluid inlet / outlet connector 50 is screwed to the fourth interface 15. The communication direction between the observation window 31 and the observation hole 22 is a first direction. The fluid inlet / outlet connector 50 includes a connecting pipe 51 arranged perpendicular to the first direction. The connecting pipe 51 is used to introduce or export fluid.

[0066] In this embodiment, the microfluidic chip 40 is fixed in the assembly slot 11, and therefore can only communicate with the outside world through the first fluid channel 16 and the second fluid channel 17. Both the first fluid channel 16 and the second fluid channel 17 are L-shaped, leading the fluid inlet and outlet to the two sides of the base 10 respectively. Therefore, both fluid inlet and outlet connectors 50 are located on the side of the base 10, avoiding occupying the space on the top and bottom surfaces of the base 10.

[0067] Furthermore, in this embodiment, after the fluid inlet / outlet connector 50 is connected to the third interface 14 or the fourth interface 15, the connecting pipe 51 is opened to facilitate the introduction of fluid into the microfluidic chip 40 or the extraction of fluid from the microfluidic chip 40. The connecting pipes 51 on both sides are arranged perpendicular to the first direction; that is, the connecting pipes 51 extend on both sides of the base 10, without extending above or below the base 10. This avoids occupying space above or below the device, allowing for the placement of observation devices (e.g., cameras) above the observation window 31, close to the cover 30, to acquire high-resolution images; or, the placement of a light source below the device. This makes efficient use of space on the device.

[0068] Specifically, in this embodiment, the two fluid inlet / outlet connectors 50 have identical structures, respectively connecting to the third interface 14 and the fourth interface 15. During the experiment, fluid enters the first fluid channel 16 from the fluid inlet / outlet connector 50, then passes through the microfluidic chip 40, and exits through the second fluid channel 17 and the other fluid inlet / outlet connector 50. Through the first fluid channel 16 and the second fluid channel 17, the microscopic channels on the microfluidic chip 40 are connected to the macroscopic channels within the fluid inlet / outlet connector 50, facilitating smooth fluid injection for the experiment.

[0069] Specifically, the connection end of the fluid inlet / outlet connector 50 disclosed in this embodiment can be provided with threads, and the inner walls of the third interface 14 and the fourth interface 15 are also provided with threads. The fluid inlet / outlet connector 50 is screwed to the third interface 14 and the fourth interface 15 to improve the airtightness of the connection and make the sealing of the entire fluid channel better, so as to improve the accuracy of the test.

[0070] Furthermore, sealing rings, gaskets, or sealant can be applied to the third interface 14 and the fourth interface 15 to further increase airtightness.

[0071] It should be noted that, in this embodiment, the first interface 131 is connected to the fluid inlet 41 of the microfluidic chip 40, and the second interface 132 is connected to the fluid outlet 42 of the microfluidic chip 40. In actual testing, these two interfaces can be interchanged. Depending on the structure of the microfluidic chip 40, it is also possible that the first interface 131 is connected to the fluid outlet 42 of the microfluidic chip 40, and the second interface 132 is connected to the fluid inlet 41 of the microfluidic chip 40. This could also be an alternative solution to this embodiment and should be within the scope of protection of this application.

[0072] For example Figure 3As shown, in another embodiment of this application, a first mounting groove 1311 is provided around the first interface 131; a second mounting groove 1321 is provided around the second interface 132; the microfluidic chip clamping device includes a first sealing ring 60 and a second sealing ring 70, the first sealing ring 60 is disposed in the first mounting groove 1311, and the second sealing ring 70 is disposed in the second mounting groove 1321.

[0073] In this embodiment, the first sealing ring 60 increases the airtightness at the first interface 131, and the second sealing ring 70 increases the airtightness at the second interface 132, ensuring a tight connection between the microchannels on the microfluidic chip 40 and the first fluid channel 16 and the second fluid channel 17, thus reducing leakage. By providing the first mounting groove 1311 and the second mounting groove 1321, the positions of the first sealing ring 60 and the second sealing ring 70 are fixed, resulting in a more stable contact with the microfluidic chip 40.

[0074] Specifically, the base 10 disclosed in this embodiment may also be provided with mounting holes (not shown in the figure). The mounting holes are used to connect and fix the bracket, assemble the observation device on the bracket, and connect the observation device to the base 10. This helps to maintain the relative position of the observation device and the base, and keeps the observation device aligned with the observation window 31 for easy observation.

[0075] For example Figure 3 and Figure 4 As shown in another embodiment of this application, a positioning pin 111 is protruding from the bottom surface of the assembly groove 11, and a positioning hole 24 is provided on the adapter 20; the positioning hole 24 is used to insert the positioning pin 111. Multiple adapters 20 are disclosed in this embodiment, which can be used to assemble microfluidic chips 40 of different sizes for testing. During repeated testing, it is necessary to maintain accurate alignment between the microchannels on the microfluidic chip 40 and the first interface 131 and the second interface 132; therefore, high assembly precision is required for the adapter 20.

[0076] By inserting the positioning pin 111 into the positioning hole 24, the installation position of the adapter 20 can be quickly positioned, reducing the assembly difficulty of the adapter 20. At the same time, the positioning pin 111 can also constrain the adapter 20, making the adapter 20 stable in the assembly slot 11, reducing shaking and improving the stability of the microfluidic chip 40.

[0077] Specifically, the positioning pin 111 disclosed in this embodiment can be directly integrally formed on the bottom surface of the assembly slot 11, and two or more positioning pins 111 can be provided. The positioning pin 111 being directly formed on the base 10 simplifies the production process and improves the stability and structural strength of the positioning pin 111. Providing multiple positioning pins 111 increases the number of contact points with the adapter 20, further improving the assembly accuracy of the adapter 20 and the stability after assembly.

[0078] For example Figure 3 and Figure 4 As shown in another embodiment of this application, the adapter 20 is provided with a magnetic element 25, which is magnetically connected to the base 10. In this embodiment, the adapter 20 and base 10 are detachably assembled. When the adapter 20 is brought close to the assembly slot 11, the attraction between the magnetic element 25 and the base 10 pulls the adapter 20 to quickly adhere to the base 10, reducing the alignment time between the adapter 20 and the assembly slot 11 and improving assembly efficiency. During disassembly and assembly, when the cover 30 is opened, the adapter 20 can maintain its connection to the base 10, preventing accidental slippage. The adapter 20 will only separate from the base 10 when subjected to external force (i.e., removed by a prying tool), which helps maintain the stability of the microfluidic chip 40 and improves the safety of the device.

[0079] For example Figure 3 As shown, in another embodiment of this application, the top surface of the adapter 20 is provided with a side groove 26, and the side wall or bottom wall of the side groove 26 is provided with a plug-in groove for inserting a prying tool; the side groove 26 and the magnetic component 25 are disposed opposite to each other on both sides of the adapter 20.

[0080] In this embodiment, a groove 26 is provided on the top surface of the adapter 20 to facilitate the insertion of a prying tool into the insertion groove from the top surface. The adapter 20 is then lifted using the prying tool to complete the removal operation. Specifically, the prying tool disclosed in this embodiment includes, but is not limited to, small tools such as pry bars, tweezers, picks, and ear picks. The prying tool is inserted into the insertion groove, and the friction between the insertion groove and the prying tool is used to lock the prying tool in place. Then, the prying tool is pulled up, which can move the adapter 20 out of the assembly slot 11.

[0081] In this embodiment, the magnetic component 25 generates an attractive force to attract the adapter 20 into the assembly slot 11. The attractive force is smaller on the side away from the magnetic component 25, so a side groove 26 is provided to pry up the adapter 20 from the side away from the magnetic component 25, reducing resistance and facilitating operation. This allows for quick removal of the adapter 20, improves the disassembly and assembly efficiency of the device, facilitates rapid replacement of the microfluidic chip 40, and shortens the test cycle.

[0082] like Figure 2 and Figure 3 As shown, in another embodiment of this application, the base 10 is provided with a bushing 18 on one side and a bayonet 19 on the other side; the cover 30 includes a cover plate 32 and a fastening clamp 33, one side of the cover plate 32 is hinged to the bushing 18 by a shaft 34, and the fastening clamp 33 is provided on the other side of the cover plate 32; the middle part of the fastening clamp 33 is connected to the cover plate 32 by a pin 331, one end of the fastening clamp 33 is provided with a beveled buckle 332, which is used to engage with the bayonet 19; the other end of the fastening clamp 33 is provided with a compression spring 333, which abuts against the cover plate 32 and is used to push the fastening clamp 33.

[0083] In this embodiment, the shaft 34 is rotatably inserted into the bushing 18, and the cover plate 32 rotates about the shaft 34 as the central axis, realizing the hinge connection between the cover plate 32 and the base 10. The cover plate 32 is used to cover the base 10, and the cover plate 32 can be pressed against the base 10 by the fastening clamp 33, pressing against the adapter 20, so that the adapter 20 and the microfluidic chip 40 remain stable.

[0084] Specifically, the fastening clamp 33 rotates around the central axis of the pin 331, and the compression spring 333 is set on the cover plate 32 to maintain the thrust on the fastening clamp 33, so that the other end of the fastening clamp 33, that is, the end with the inclined locking buckle 332, maintains the rotational tendency.

[0085] When the cover plate 32 is closed onto the base 10, the inclined latch 332 tends to rotate inward toward the bayonet 19, thus maintaining the locked state and keeping the cover plate 32 close to the base 10. When the test is completed, the fastening clip 33 can be pried in the opposite direction to overcome the elastic force of the compression spring 333, causing the fastening clip 33 to rotate in the opposite direction. The inclined latch 332 disengages from the bayonet 19, and the cover plate 32 changes from the locked state to the movable state, allowing it to be separated from the base 10, and thus the adapter 20 can be quickly removed.

[0086] In summary, the cover 30 disclosed in this embodiment is firmly connected to the base 10, and the closing method is simple and efficient, which helps to simplify the operation of the device.

[0087] Specifically, in another embodiment of this invention, a transparent cover sheet is disclosed on the cover plate 32. The cover plate 32 is provided with the observation window 31. The cover sheet at the observation window 31 helps to block dust and prevent dust or impurities from entering the assembly groove 11, thus avoiding contamination of the microfluidic chip 40. The cover sheet can be made of transparent polycarbonate material, transparent glass, etc.

[0088] In summary, this application discloses a microfluidic chip clamping device for carbon dioxide geological storage technology, comprising a base 10, an adapter 20, and a cover 30. The base 10 has an assembly groove 11; the adapter 20 is disposed within the assembly groove 11; the adapter 20 has a slot 21 for placing a microfluidic chip 40; the cover 30 covers the base 10 to press the adapter 20 firmly; several adapters 20 are provided, each with a different size of the slot 21. Based on the size of the microfluidic chip 40 selected for the current experiment, a corresponding model of adapter 20 is used; the adapter 20 is assembled on the base 10, one side of the cover 30 is hinged to the base 10, and the other side can rotate to the top of the base 10 and connect to it, achieving a tight fit between the cover 30 and the base 10; based on this, the adapter 20 is pressed by the cover 30, pressing and fixing the microfluidic chip 40 onto the base 10 for testing purposes. As can be seen, the microfluidic chip clamping device disclosed in this embodiment has a simple structure, the adapter 20 is easy to install and remove, and it can be applied to a variety of test scenarios to meet different usage requirements.

[0089] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0090] It should be noted that this invention uses a microfluidic chip clamping device for carbon dioxide geological storage technology as an example to introduce the specific structure and working principle of the invention. However, the application of this invention is not limited to the microfluidic chip clamping device for carbon dioxide geological storage technology, and it can also be applied to the production and use of other similar workpieces.

[0091] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0092] 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 within the protection scope of the present invention.

Claims

1. A microfluidic chip clamping device for carbon dioxide geological storage technology, characterized in that, include: A base having an assembly groove formed thereon; The adapter is located within the assembly slot; The adapter is provided with a slot for placing a microfluidic chip; A cover, which fits onto the base, is used to press the adapter in place; The adapter is provided in several parts, and the size of the card slot on each adapter is different; The card slot is located on the bottom surface of the adapter; the adapter is provided with an observation hole, which communicates with the card slot and is located above the card slot; the cover is provided with an observation window opposite the observation hole; the base is provided with a bottom through hole opposite the observation hole; the observation window, the observation hole, the card slot, and the bottom through hole are arranged sequentially in a straight line. The cross-sectional area of ​​the observation hole is smaller than the cross-sectional area of ​​the card slot; a top support platform is formed on the side of the card slot connected to the observation hole; the cross-sectional area of ​​the bottom through hole is smaller than the cross-sectional area of ​​the card slot; a bottom support platform is formed on the bottom surface of the assembly slot; when the cover presses the adapter, the top support platform and the bottom support platform move closer to each other to clamp the microfluidic chip. The bottom support platform is provided with a first interface and a second interface; the first interface is used to connect to the fluid inlet of the microfluidic chip, and the second interface is used to connect to the fluid outlet of the microfluidic chip; a third interface and a fourth interface are respectively provided on the side walls on both sides of the base; a first fluid channel and a second fluid channel are formed inside the base; the first fluid channel connects the first interface and the third interface; the second fluid channel connects the second interface and the fourth interface; the microfluidic chip clamping device includes two fluid inlet / outlet connectors, one of which is screwed to the third interface, and the other is screwed to the fourth interface; wherein, the communication direction between the observation window and the observation hole is a first direction, and the fluid inlet / outlet connector includes a connecting pipe arranged perpendicular to the first direction, the connecting pipe being used to introduce or export fluid.

2. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 1, characterized in that, A first mounting slot is provided around the first interface; a second mounting slot is provided around the second interface. The microfluidic chip clamping device includes a first sealing ring and a second sealing ring, wherein the first sealing ring is disposed in the first mounting groove and the second sealing ring is disposed in the second mounting groove.

3. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 1, characterized in that, A positioning pin is provided protruding from the bottom surface of the assembly slot, and a positioning hole is provided on the adapter; the positioning hole is used to insert the positioning pin.

4. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 1, characterized in that, The adapter is provided with a magnetic component, which is magnetically connected to the base.

5. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 4, characterized in that, The top surface of the adapter has a side groove, and the side wall or bottom wall of the side groove has a plug-in groove for inserting a prying tool. The edge groove and the magnetic component are arranged opposite each other on both sides of the adapter.

6. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 1, characterized in that, A bushing is provided on one side of the base, and a bayonet is provided on the other side; The cover includes a cover plate and a fastening clamp. One side of the cover plate is hinged to the bushing via a shaft, and the fastening clamp is provided on the other side of the cover plate. The middle part of the fastening clamp is connected to the cover plate via a pin. One end of the fastening clamp is provided with a beveled buckle, which is used to engage with the latch. The other end of the fastening clamp is provided with a compression spring, which abuts against the cover plate and is used to push the fastening clamp.

7. The microfluidic chip clamping device for carbon dioxide geological storage technology according to any one of claims 1 to 6, characterized in that, The base can be any one of the following: iron alloy base, nickel-based alloy base, titanium alloy base, or tantalum-tungsten alloy base.

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