Micro-fluidic chip clamping device for carbon dioxide geological storage technology

Abstract

The invention relates to the technical field of carbon dioxide geological sequestration, and discloses a micro-fluidic chip clamping device for a carbon dioxide geological sequestration technology, the micro-fluidic chip clamping device comprises a base, an adapter and a cover body, an assembly groove is formed in the base; the adapter is arranged in the assembling groove; the adapter is provided with a clamping groove for placing the micro-fluidic chip; the cover body covers the base and is used for pressing the adapter; the number of the adapters is multiple, and the sizes of the clamping grooves formed in the adapters are different. According to the clamping device, the appropriate adapter is selected between the base and the cover body to assemble the micro-fluidic chips with different sizes, so that the available range of the clamping device is enlarged, and various use requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide geological storage, and in particular to a microfluidic chip clamping device used in carbon dioxide geological storage technology. Background Art

[0002] Geological Carbon Sequestration (CCS) technology is a technology that captures carbon dioxide generated during industrial or energy production processes and stores it in underground geological structures for a long period of time. It aims to reduce greenhouse gas concentrations in the atmosphere and mitigate climate change. During the research and improvement phase of CCS technology, repeated experiments are required to optimize storage efficiency and safety. Because the high-temperature and high-pressure underground environment is different from the normal temperature environment on the ground, microfluidic chips are usually fixed with 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 to study the interaction between carbon dioxide and formation water, providing key scientific support for the transition of storage technology from laboratory to field application.

[0003] However, common clamps for microfluidic chips are only suitable for conventional room temperature and normal pressure experimental environments. They are also complex in structure and usually require multiple bolt connections. They can only fix microfluidic chips of specific sizes and cannot meet the needs of use in multiple scenarios.

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

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a microfluidic chip clamping device for carbon dioxide geological storage technology, aiming to solve the problem that the existing clamps for microfluidic chips are inconvenient to operate and cannot adapt to the use requirements of various microfluidic chips.

[0006] The technical solutions of the present invention are as follows: A microfluidic chip clamping device for carbon dioxide geological storage technology, comprising: a base, wherein a mounting groove is formed on the base; An adapter is arranged in the assembly groove; the adapter is provided with a slot for placing the microfluidic chip; a cover body, covering the base and used for pressing the adapter; There are several adapters, and the size of the card slot provided on each adapter is different.

[0007] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein the card slot is provided on the bottom surface of the adapter; the adapter is provided with an observation hole, which is connected to the card slot and is located above the card slot; the cover is provided with an observation window at a position opposite to the observation hole; and the base is provided with a bottom through hole at a position opposite to the observation hole; Wherein, the observation window, the observation hole, the card slot and the bottom through hole are arranged in sequence along a straight line.

[0008] 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 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; the bottom surface of the assembly slot is formed with a bottom support platform; When the cover presses the adapter, the top support platform and the bottom support platform approach each other to clamp the microfluidic chip.

[0009] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein 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 in 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 and outlet connectors, one of which is threadedly connected to the third interface, and the other of which is threadedly connected to the fourth interface; The communication direction between the observation window and the observation hole is a first direction, and the fluid inlet and outlet connector includes a connecting pipe arranged perpendicular to the first direction, and the connecting pipe is used to import or export fluid.

[0010] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein a first mounting groove is provided around the first interface; a second mounting groove is provided around the second interface; The microfluidic chip clamping device includes a first sealing ring and a second sealing ring. The first sealing ring is arranged in the first mounting groove, and the second sealing ring is arranged in the second mounting groove.

[0011] In the microfluidic chip clamping device for carbon dioxide geological storage technology, a positioning pin is protruding from the bottom surface of the assembly groove, and a positioning hole is provided on the adapter; the positioning hole is used to insert the positioning pin.

[0012] In the microfluidic chip clamping device for carbon dioxide geological storage technology, the adapter is provided with a magnetic component, and the magnetic component is magnetically connected to the base.

[0013] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein the edge of the top surface of the adapter is provided with a sideline notch, and the side wall or bottom wall of the sideline notch is provided with an insertion groove, and the insertion groove is used to insert a prying tool; Wherein, the edge line notch and the magnetic component are arranged on two sides of the adapter opposite to each other.

[0014] The microfluidic chip clamping device for carbon dioxide geological storage technology, wherein a shaft sleeve is provided on one side of the base and a bayonet is provided on the other side; The cover body includes a cover plate and a fastening clip, one side of the cover plate is hinged to the sleeve through a shaft rod, and the other side of the cover plate is provided with the fastening clip; the middle part of the fastening clip is connected to the cover plate through a pin shaft, and one end of the fastening clip is provided with a bevel lock, and the bevel lock is used to snap into the bayonet; the other end of the fastening clip is provided with a compression spring, and the compression spring abuts against the cover plate to push the fastening clip.

[0015] In the microfluidic chip clamping device for carbon dioxide geological storage technology, the base is any one of an iron alloy base, a nickel-based alloy base, a titanium alloy base, and a tantalum-tungsten alloy base.

[0016] Compared with the prior art, the embodiments of the present invention have the following advantages: The microfluidic chip clamping device disclosed in the present invention is configured to load the microfluidic chip by providing multiple adapters. The adapters are selected based on the size of the microfluidic chip selected for the current test. The adapters are assembled on the base, with one side of the cover hinged to the base, and the other side can be rotated above the base and connected to the base to achieve a state in which the cover and the base are tightly attached. On this basis, the adapters are squeezed by the cover, pressing the microfluidic chip tightly against the base to facilitate testing. As can be seen, the microfluidic chip clamping device disclosed in the present invention has a simple structure and the adapters are easy to assemble and disassemble. It can be applied to a variety of test scenarios to meet different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in 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 Schematic diagram of the structure of the microfluidic chip clamping device used for carbon dioxide geological storage technology in the present invention; Figure 2 for Figure 1 Cross-sectional view along AA' direction; Figure 3 This is an exploded view of the structure of the microfluidic chip clamping device used in the carbon dioxide geological storage technology of the present invention; Figure 4 A schematic structural diagram of the adapter and the microfluidic chip of the present invention from another angle; Figure 5 It is a cross-sectional view of the base in the present invention.

[0019] Among them, 10, base; 11, assembly groove; 111, positioning pin; 12, bottom through hole; 13, bottom support platform; 131, first interface; 1311, first mounting groove; 132, second interface; 1321, second mounting groove; 14, third interface; 15, fourth interface; 16, first fluid channel; 17, second fluid channel; 18, shaft sleeve; 19, bayonet; 20, adapter; 21, slot; 22, observation hole; 2 3. Top support platform; 24. Positioning hole; 25. Magnetic part; 26. Edge notch; 30. Cover; 31. Observation window; 32. Cover plate; 33. Fastening clamp; 331. Pin; 332. Bevel lock; 333. Compression spring; 34. Shaft; 40. Microfluidic chip; 41. Fluid inlet; 42. Fluid outlet; 50. Fluid inlet and outlet connector; 51. Docking pipe; 60. First sealing ring; 70. Second sealing ring. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0022] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0023] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0024] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be located "below" or "lower" relative to the other element. Thus, the term "above" encompasses both the orientations of "above" and "below," 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.

[0025] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] A microfluidic chip, also known as a "lab-on-a-chip," is an integrated experimental platform for precisely manipulating minute amounts of fluid (nanoliter to microliter) at the micrometer scale (typically with channel widths of 10–500 microns). Its core principle is to use micromachining technology to construct microchannels, reaction chambers, valves, and other structures on chip materials to achieve precise control of fluid movement, mixing, separation, or reactions. Microfluidic chips have a wide range of applications and are currently being gradually adopted in environmental monitoring. In carbon dioxide geological storage technology, the use of microfluidic chips allows for direct observation and visualization of fluid flow patterns within microchannels, enabling intuitive acquisition of experimental results.

[0027] However, the testing process for geological storage technology requires simulating a high-temperature, high-pressure environment at depths of 800-1000 meters underground. Furthermore, the environment can vary depending on the depth. To simulate various underground environments, different models of microfluidic chips are required for testing. Currently, the clamping structure used to secure microfluidic chips during testing is rigid, making it difficult to accommodate multiple microfluidic chips in a one-to-many manner, and is not suitable for high-temperature, high-pressure environments. Therefore, the embodiments of this application disclose a microfluidic chip clamping device for carbon dioxide geological storage technology to accommodate a variety of testing scenarios.

[0028] See Figure 1 、 Figure 3 and Figure 4 In one embodiment of the present invention, a microfluidic chip clamping device for carbon dioxide geological storage technology is disclosed, which includes a base 10, an adapter 20 and a cover 30. The base 10 is formed with an assembly groove 11; the adapter 20 is arranged in the assembly groove 11; the adapter 20 is provided with a card slot 21 for placing a microfluidic chip 40; the cover 30 is covered on the base 10 to press the adapter 20; a plurality of adapters 20 are provided, and the size of the card slot 21 provided on each adapter 20 is different.

[0029] The microfluidic chip clamping device disclosed in this embodiment is configured to load a microfluidic chip 40 by providing multiple adapters 20. The adapters 20 are selected based on the size of the microfluidic chip 40 selected for the current test. The adapters 20 are assembled on the base 10. One side of the cover 30 is hinged to the base 10, and the other side can be rotated to the top of the base 10 and connected to the base 10, so that the cover 30 and the base 10 are in close contact. On this basis, the adapters 20 are squeezed by the cover 30, pressing the microfluidic chip 40 tightly against the base 10 to facilitate 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. The cover 30 is separated from the base 10, and after opening the assembly slot 11, the adapters 20 can be removed to quickly and conveniently replace the microfluidic chip 40.

[0030] Specifically, applied to carbon dioxide geological storage technology, the microfluidic chip 40 disclosed in this embodiment is a chemically bonded silicon-based microfluidic chip, which is made of silicon material and has a certain pressure resistance. It 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 when clamped by the cover 30 and the base 10.

[0031] It can be seen that the microfluidic chip clamping device disclosed in this embodiment has a simple structure, and the adapter 20 is easy to assemble and disassemble. It can be applied to various test scenarios and meet different usage requirements.

[0032] It should be noted that the sizes of the slots 21 on the different adapters 20 disclosed in this embodiment are different, but the sizes 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 a length 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 size of the slots 21, multiple adapters 20 can be numbered and then selected according to the size of the microfluidic chip 40 used in the test process so that the microfluidic chip 40 matches the shape of the slots 21. Preferably, the sidewalls of the slots 21 contact the sidewalls of the microfluidic chip 40, thereby constraining the microfluidic chip 40, preventing the microfluidic chip 40 from shaking, and improving the stability of the device for easy observation.

[0033] It should also be noted that the size parameters of the adapter 20 disclosed in this embodiment are for illustrative purposes only and are not exhaustive. In other alternatives of the present application, as long as the size of the adapter 20 is appropriate, the technical effects disclosed in the present application can be achieved. As an equivalent replacement for the concept of the present invention, it should also be within the scope of protection of the present application.

[0034] Specifically, in another implementation of this embodiment, the height of the adapter 20 can be set 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. In other words, when the adapter 20 is placed in the mounting groove 11, the top surface of the adapter 20 is flush with the opening of the mounting groove 11, or protrudes 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, limiting the adapter 20.

[0035] In summary, the adapter 20 is clamped by the cover 30 and the base 10 to maintain stability, thereby improving the stability of the microfluidic chip 40 and facilitating observation and testing.

[0036] Specifically, the adapter 20 is used to carry the microfluidic chip 40 and requires a certain structural strength. At the same time, when clamped by the cover 30 and the base 10, the adapter 20 needs to have a certain anti-extrusion ability; at the same time, the adapter 20 also needs to be able to withstand high temperature and high pressure environments, generally needing to withstand a pressure of at least 1 megapascal (Mpa), and remain stable in an environment of at least 0°C to 70°C to match the experimental requirements of carbon dioxide sequestration technology.

[0037] Another embodiment of this embodiment discloses that the adapter 20 is made of rubber, metal, or polyetheretherketone (PEEK). Rubber is flexible, structurally stable, and has a long service life. Metal materials, such as 316 stainless steel and nickel-based alloys, offer excellent extrusion resistance. PEEK also has excellent stability and can withstand high-temperature and high-pressure environments. Therefore, in this embodiment, the adapter 20 is manufactured using rubber, metal, PEEK, or other materials, ensuring that it can meet the testing requirements of the field of carbon dioxide geological storage.

[0038] It should be noted that the manufacturing materials of the adapter 20 are only exemplified in this embodiment, but are not limited to this. Other types of adapters 20, as long as they can achieve the technical effects disclosed in this application, should also be within the scope of protection of this application as equivalent replacements for the concepts of the present invention.

[0039] Specifically, as another embodiment of the present application, the base 10 is disclosed as any one of an iron alloy base, a nickel-based alloy base, a titanium alloy base, and a tantalum-tungsten alloy base. The base 10 made of a metal alloy has advantages such as high structural strength, good compressive strength, high temperature resistance, and a long service life. Furthermore, the base 10 made of a metal material has high thermal conductivity, which facilitates rapid transfer of ambient heat to the assembly slot 11, allowing the temperature of the microfluidic chip 40 to reach the test requirements more quickly, thus meeting the test needs.

[0040] In addition, the base 10 and the adapter 20 disclosed in this embodiment can both be made of magnetic materials, so that an attractive force 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, further improving the stability of the microfluidic chip 40.

[0041] Furthermore, the cover 30 disclosed in this embodiment is hingedly connected to the base 10 and can be manufactured from the same material as the base 10 to reduce production costs. Furthermore, the use of metal materials on both the cover 30 and the base 10 enhances contact and increases the overall device's resistance to high temperatures and pressures, meeting the requirements of CO2 geological storage.

[0042] like Figure 1 、 Figure 2 and Figure 3 As shown, as another embodiment of the present application, it is disclosed that the card slot 21 is arranged on the bottom surface of the adapter 20; the adapter 20 is provided with an observation hole 22, which is connected to the card slot 21 and is located above the card slot 21; the cover body 30 is provided with an observation window 31 at a position opposite to the observation hole 22; the base 10 is provided with a bottom through hole 12 at a position 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 in sequence along a straight line.

[0043] The microfluidic chip clamping device disclosed in this embodiment is used in carbon dioxide geological storage technology to achieve a visual effect of 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. At the same time, if a double-sided light-transmitting microfluidic chip 40 is used for testing, a light source can be added to inject light from the bottom through-hole 12 to illuminate the microfluidic chip 40, so that the situation inside the microchannel can be displayed more clearly. In another embodiment, if a single-sided light-transmitting microfluidic chip 40 is used for testing, light can be irradiated from the observation window 31 to also clearly observe the microfluidic chip 40.

[0044] Specifically, in this embodiment, the observation window 31, the observation hole 22, the card slot 21 and the bottom via 12 extend in a straight line direction. Therefore, whether the light is incident from the bottom or the top, the brightness inside the assembly groove 11 can be increased, and the reflected light can be emitted from the observation window 31 to clearly display the situation inside the microfluidic chip 40.

[0045] like Figure 3 and Figure 4As shown, as another embodiment of the present application, it is disclosed that the cross-sectional area of ​​the observation hole 22 is smaller than the cross-sectional area of ​​the card slot 21; a top support platform 23 is formed on the side of the card slot 21 connected to the observation hole 22; the cross-sectional area of ​​the bottom via 12 is smaller than the cross-sectional area of ​​the card slot 21; a bottom support platform 13 is formed on the bottom surface of the assembly groove 11; when the cover body 30 squeezes the adapter 20, the top support platform 23 and the bottom support platform 13 approach each other to clamp the microfluidic chip 40.

[0046] The microchannels on the microfluidic chip 40 are generally arranged in the middle position, and the liquid inlet or outflow ports are set at the edge positions. Therefore, in this embodiment, the observation hole 22 and the bottom via 12 are preferably arranged coaxially 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 via 12 also contacts the edge of the microfluidic chip 40. The top support platform 23 and the bottom support platform 13 are used to simultaneously apply pressure to the edges of both sides of the microfluidic chip 40 to achieve the effect of clamping the microfluidic chip 40, so that the position of the microfluidic chip 40 is fixed, the stability of the device is improved, and it is easy to observe.

[0047] like Figure 3 and Figure 5 As shown, as another embodiment of the present application, it is disclosed that a first interface 131 and a second interface 132 are provided on the bottom support platform 13; 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 and outlet connectors 50, one of the fluid inlet and outlet connectors 50 is threadedly connected to the third interface 14, and the other fluid inlet and outlet connector 50 is threadedly connected to the fourth interface 15; the communication direction between the observation window 31 and the observation hole 22 is a first direction, and the fluid inlet and outlet connector 50 includes a docking pipe 51 arranged perpendicular to the first direction, and the docking pipe 51 is used to import or export fluid.

[0048] The microfluidic chip 40 disclosed in this embodiment is fixed in the assembly slot 11 and therefore communicates with the outside world only through the first fluid channel 16 and the second fluid channel 17. Both the first and second fluid channels 16 and 17 are L-shaped, directing the fluid inlet and outlet to the sides of the base 10. Therefore, the two fluid inlet and outlet connectors 50 are located on the sides of the base 10, avoiding occupying space on the top and bottom surfaces of the base 10.

[0049] Furthermore, after the fluid inlet and outlet connector 50 disclosed in this embodiment docks with the third port 14 or the fourth port 15, a docking line 51 is connected to facilitate the introduction of fluid into the microfluidic chip 40 or the removal of fluid from the microfluidic chip 40. Both docking lines 51 are arranged perpendicular to the first direction. That is, the docking lines 51 extend along both sides of the base 10, rather than extending above or below the base 10. This avoids occupying space above or below the device, allowing observation equipment (such as a camera) to be positioned above the observation window 31, close to the cover 30, to capture high-resolution images, or a light source to be positioned below the device. This optimizes the use of space within the device.

[0050] Specifically, in this embodiment, the two fluid inlet and outlet connectors 50 have the same structure and are connected to the third interface 14 and the fourth interface 15, respectively. During the test, the fluid enters the first fluid channel 16 from the fluid inlet and outlet connector 50, then passes through the microfluidic chip 40, and is discharged through the second fluid channel 17 and the other fluid inlet and 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 and outlet connectors 50, facilitating smooth fluid injection for testing.

[0051] Specifically, the connection end of the fluid inlet and 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 and outlet connector 50 is threadedly connected to the third interface 14 and the fourth interface 15 to improve the airtightness of the connection, so that the sealing of the entire fluid channel is better, thereby improving the accuracy of the test.

[0052] Furthermore, a sealing ring or a sealing gasket may be provided at the third interface 14 and the fourth interface 15 , or a sealant may be applied thereto to further enhance air tightness.

[0053] It should be noted that the first interface 131 disclosed in this embodiment connects to the fluid inlet 41 of the microfluidic chip 40, and the second interface 132 connects to the fluid outlet 42 of the microfluidic chip 40. In actual experiments, these two interfaces can be interchanged. Depending on the structure of the microfluidic chip 40, it is also possible that the first interface 131 connects to the fluid outlet 42 of the microfluidic chip 40, and the second interface 132 connects to the fluid inlet 41 of the microfluidic chip 40. This alternative solution, as an alternative to this embodiment, is also within the scope of protection of this application.

[0054] For example Figure 3 As shown, as another embodiment of the present 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 provided in the first mounting groove 1311, and the second sealing ring 70 is provided in the second mounting groove 1321.

[0055] In this embodiment, the first sealing ring 60 enhances airtightness at the first interface 131, while the second sealing ring 70 enhances airtightness at the second interface 132. This ensures a tight connection between the microchannels on the microfluidic chip 40 and the first and second fluid channels 16 and 17, reducing fluid leakage. The first and second mounting grooves 1311 and 1321 secure the positions of the first and second sealing rings 60 and 70, ensuring a more stable connection with the microfluidic chip 40.

[0056] Specifically, a mounting hole (not marked in the drawings) can also be provided on the base 10 disclosed in this embodiment. The mounting hole is used to connect a fixing bracket, and the observation device is assembled on the bracket to connect the observation device to the base 10, which is conducive to maintaining the relative position of the observation device and the base, so that the observation device remains aligned with the observation window 31 for easy observation.

[0057] For example Figure 3 and Figure 4 As shown, as another embodiment of the present application, a positioning pin 111 is provided 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, and microfluidic chips 40 of different sizes can be assembled 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, so high requirements are placed on the assembly accuracy of the adapter 20.

[0058] By plugging the positioning pins 111 into the positioning holes 24, the adapter 20 can be quickly positioned for installation, thereby reducing the difficulty of assembling the adapter 20. At the same time, the positioning pins 111 can also constrain the adapter 20, making it stable in the assembly slot 11, reducing shaking and improving the stability of the microfluidic chip 40.

[0059] Specifically, the positioning pin 111 disclosed in this embodiment can be directly integrally molded onto the bottom surface of the assembly slot 11, and two or more positioning pins 111 can be provided. Directly molding the positioning pin 111 onto 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 and stability of the adapter 20 after assembly.

[0060] For example Figure 3 and Figure 4 As shown, as another embodiment of the present application, it is disclosed that a magnetic part 25 is provided on the adapter 20, and the magnetic part 25 is magnetically connected to the base 10. The adapter 20 disclosed in this embodiment is detachably assembled with the base 10. When the adapter 20 is close to the assembly slot 11, the attraction between the magnetic part 25 and the base 10 can pull the adapter 20 quickly close to the base 10, reducing the time for the adapter 20 to align with the assembly slot 11 and improving assembly efficiency. During the disassembly and assembly process, when the cover 30 is opened, the adapter 20 can maintain connection with the base 10 to avoid accidental slipping. The adapter 20 will only be separated from the base 10 when subjected to external force (i.e., removed by a prying tool), which is beneficial to maintaining the stability of the microfluidic chip 40 and improving the safety of the device.

[0061] For example Figure 3 As shown, as another embodiment of the present application, it is disclosed that the edge of the top surface of the adapter 20 is provided with a side line notch 26, and the side wall or bottom wall of the side line notch 26 is provided with an insertion groove, and the insertion groove is used to insert a prying tool; the side line notch 26 and the magnetic part 25 are relatively arranged on both sides of the adapter 20.

[0062] In this embodiment, a side notch 26 is provided on the top surface of the adapter 20 to facilitate inserting a prying tool from the top surface into the insertion groove. The prying tool can then be used to lift the adapter 20 and complete the removal operation of the adapter 20. Specifically, the prying tool disclosed in this embodiment includes, but is not limited to, small tools such as a pry bar, tweezers, a pick, and an ear pick. The prying tool is inserted into the insertion groove, and the friction between the insertion groove and the prying tool is used to clamp the prying tool. The prying tool is then lifted to remove the adapter 20 from the assembly slot 11.

[0063] In this embodiment, the magnetic part 25 generates suction to suck the adapter 20 into the assembly groove 11. The suction is smaller on the side away from the magnetic part 25, so a side notch 26 is provided to pry up the adapter 20 from the side away from the magnetic part 25, thereby reducing resistance and facilitating operation, so as to quickly remove the adapter 20, improve the efficiency of assembly and disassembly of the device, facilitate rapid replacement of the microfluidic chip 40, and shorten the test cycle.

[0064] like Figure 2 and Figure 3 As shown, as another embodiment of the present application, it is disclosed that a shaft sleeve 18 is provided on one side of the base 10, and a bayonet 19 is provided on the other side; the cover body 30 includes a cover plate 32 and a fastening clamp 33, one side of the cover plate 32 is hinged to the shaft sleeve 18 through an axle rod 34, and the other side of the cover plate 32 is provided with the fastening clamp 33; the middle part of the fastening clamp 33 is connected to the cover plate 32 through a pin shaft 331, and one end of the fastening clamp 33 is provided with a bevel lock 332, and the bevel lock 332 is used to snap into the bayonet 19; the other end of the fastening clamp 33 is provided with a compression spring 333, and the compression spring 333 abuts against the cover plate 32 for pushing the fastening clamp 33.

[0065] The shaft 34 disclosed in this embodiment is rotatably inserted into the shaft sleeve 18, and the cover 32 rotates about the shaft 34 as the central axis, thereby achieving a hinged connection between the cover 32 and the base 10. The cover 32 is used to cover the base 10. The fastening clamp 33 can be used to tighten the cover 32 against the base 10, pressing against the adapter 20 to maintain the stability of the adapter 20 and the microfluidic chip 40.

[0066] Specifically, the fastening clamp 33 rotates around the pin shaft 331 as the central axis, 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 where the inclined lock 332 is set, maintains the rotation tendency.

[0067] When the cover 32 is closed onto the base 10, the inclined locking catch 332 maintains a tendency to rotate toward the notch 19, thereby maintaining the locked state and keeping the cover 32 close to the base 10. When the test is completed, the fastening clip 33 can be bent 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, and the inclined locking catch 332 to disengage from the notch 19. At this time, the cover 32 changes from the locked state to the active state, and can be separated from the base 10, and the adapter 20 can be quickly removed.

[0068] In summary, the cover 30 disclosed in this embodiment is firmly connected to the base 10, and the covering method is simple and efficient, which helps to simplify the operation difficulty of the device.

[0069] Specifically, another embodiment of this embodiment discloses that a transparent cover sheet can be provided on the cover plate 32. The observation window 31 is provided on the cover plate 32. Providing a cover sheet at the observation window 31 helps block dust, preventing dust or impurities from entering the assembly slot 11 and contaminating the microfluidic chip 40. The cover sheet can be made of transparent polycarbonate, transparent glass, or the like.

[0070] In summary, the present application discloses a microfluidic chip clamping device for carbon dioxide geological storage technology, which includes a base 10, an adapter 20, and a cover 30. The base 10 is formed with an assembly groove 11; the adapter 20 is disposed in the assembly groove 11; the adapter 20 is provided with a clamping groove 21 for placing a microfluidic chip 40; the cover 30 is covered on the base 10 to compress the adapter 20; a plurality of adapters 20 are provided, and the size of the clamping groove 21 provided on each adapter 20 is different. According to the size of the microfluidic chip 40 selected for the current test, a corresponding model of adapter 20 is used; the adapter 20 is assembled on the base 10, and one side of the cover 30 is hinged to the base 10, and the other side can be rotated to the top of the base 10 and connected to the base 10 to achieve a state where the cover 30 and the base 10 are in close contact; on this basis, the adapter 20 is squeezed by the cover 30, pressing the microfluidic chip 40 to the base 10 for easy testing. It can be seen that the microfluidic chip clamping device disclosed in this embodiment has a simple structure, and the adapter 20 is easy to assemble and disassemble. It can be applied to various test scenarios and meet different usage requirements.

[0071] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0072] It should be noted that the present 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 present invention, but the application of the present invention is not limited to the microfluidic chip clamping device for carbon dioxide geological storage technology, and can also be applied to the production and use of other similar workpieces.

[0073] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0074] 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 chip clamping device for carbon dioxide geological storage technology, characterized in that: include: a base, wherein a mounting groove is formed on the base; an adapter, disposed in the assembly slot; The adapter is provided with a slot for placing the microfluidic chip; a cover body, covering the base and used for pressing the adapter; There are several adapters, and the size of the card slot provided on each adapter is different.

2. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 1 is characterized in that: The card slot is provided on the bottom surface of the adapter; an observation hole is provided on the adapter, the observation hole is communicated with the card slot and is located above the card slot; an observation window is provided on the cover body at a position opposite to the observation hole; a bottom through hole is provided on the base at a position opposite to the observation hole; Wherein, the observation window, the observation hole, the card slot and the bottom through hole are arranged in sequence along a straight line.

3. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 2 is characterized in that: 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 one 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; the bottom surface of the assembly slot is formed with a bottom support platform; When the cover presses the adapter, the top support platform and the bottom support platform approach each other to clamp the microfluidic chip.

4. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 3 is characterized in that: 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 in the base; the first fluid channel is connected to the first interface and the third interface; the second fluid channel is connected to the second interface and the fourth interface; The microfluidic chip clamping device includes two fluid inlet and outlet connectors, one of which is threadedly connected to the third interface, and the other of which is threadedly connected to the fourth interface; The communication direction between the observation window and the observation hole is a first direction, and the fluid inlet and outlet connector includes a connecting pipe arranged perpendicular to the first direction, and the connecting pipe is used to import or export fluid.

5. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 4 is characterized in that: A first mounting groove is provided around the first interface; a second mounting groove is provided around the second interface; The microfluidic chip clamping device includes a first sealing ring and a second sealing ring. The first sealing ring is arranged in the first mounting groove, and the second sealing ring is arranged in the second mounting groove.

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

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

8. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 7, characterized in that: The edge of the top surface of the adapter is provided with a side line notch, and the side wall or bottom wall of the side line notch is provided with an insertion groove, and the insertion groove is used to insert a prying tool; Wherein, the edge line notch and the magnetic component are arranged on two sides of the adapter opposite to each other.

9. The microfluidic chip clamping device for carbon dioxide geological storage technology according to claim 1, characterized in that: A shaft sleeve is provided on one side of the base, and a bayonet is provided on the other side; The cover body includes a cover plate and a fastening clip, one side of the cover plate is hinged to the sleeve through a shaft rod, and the other side of the cover plate is provided with the fastening clip; the middle part of the fastening clip is connected to the cover plate through a pin shaft, and one end of the fastening clip is provided with a bevel lock, and the bevel lock is used to snap into the bayonet; the other end of the fastening clip is provided with a compression spring, and the compression spring abuts against the cover plate to push the fastening clip.

10. The microfluidic chip clamping device for carbon dioxide geological storage technology according to any one of claims 1 to 9, characterized in that: The base is any one of an iron alloy base, a nickel-based alloy base, a titanium alloy base, and a tantalum-tungsten alloy base.

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