Reaction apparatus

Abstract

The application relates to the technical field of material performance testing, and particularly provides a reaction device, which aims to solve the problem of poor convenience of sealing and fixing when a straight sample tube is used to simplify an operation process. To this end, the reaction device comprises: a mounting main body, an installation cavity is formed in the mounting main body, an air inlet channel and an air outlet channel are arranged on the mounting main body, and the air inlet channel and the air outlet channel are both communicated with the installation cavity; a sample tube, an open end of the sample tube is inserted into the installation cavity; a gas guide pipe is inserted into the sample tube, gas enters the bottom of the sample tube through the gas guide pipe and is discharged to the air outlet channel through an annular gap; and a locking mechanism is used for detachably fixing the sample tube in the installation cavity and forming a seal between the sample tube and the installation cavity. The locking mechanism can integrally complete the locking and sealing actions, and the convenience of sample tube installation and the sealing reliability are improved.

Description

Technical Field

[0001] This application relates to the field of materials performance testing technology, specifically providing a reaction apparatus. Background Technology

[0002] Chemisorption analyzers are key equipment for studying the chemical properties of material surfaces. Their core principle is based on the phenomenon of chemisorption, where adsorbate molecules and solid surface atoms form chemisorption bonds through electron transfer, exchange, or co-existence. This instrument is widely used in catalyst characterization, surface science, and materials research, providing crucial information such as the number of active sites on catalysts, redox performance, and surface acidity / basicity, offering data support for catalyst design and reaction mechanism research. However, most current mainstream chemisorption analyzers use U-shaped sample tubes. Before testing, the sample must be placed in the tube, and the inlet and outlet pipes must be sealed and installed at both ends of the sample tube. This structure makes the disassembly, cleaning, and reassembly process extremely cumbersome after testing, not only inefficient but also prone to sample tube breakage and poor sealing, directly affecting the accuracy and reliability of the test and increasing time and cost.

[0003] To simplify the structure, the applicant's earlier patent application proposed an improved solution, which uses a straight sample tube open at one end. By integrating an inlet channel, an outlet channel, and a vertical mounting cavity into the mounting body, the open end of the sample tube is inserted into the mounting cavity, and the airflow is guided by a built-in gas guide tube, achieving the introduction and discharge of the reaction gas. This design effectively avoids the drawback of traditional U-shaped tubes requiring connections at both ends. Furthermore, the single-end opening and easy clamping and positioning of the straight sample tube, compared to U-shaped tubes which require avoiding multiple pipe ends, are more compatible with the standardized operating logic of automated equipment. It eliminates the need for complex multi-directional positioning adjustments, allowing robots to directly and stably clamp the sample tube, thus contributing to the development of chemisorption analyzers towards automated testing. However, achieving a rapid and reliable seal and fixation between the open end of the sample tube and the mounting cavity remains a key issue. Inadequate sealing will lead to gas leakage, affecting testing accuracy; inconvenient fixation will prevent rapid sample replacement, hindering the full utilization of the convenience and automation adaptability advantages of the straight sample tube.

[0004] Therefore, a new sealing and locking mechanism is urgently needed to solve the above problems and further improve the ease of use and testing efficiency of the equipment. Utility Model Content

[0005] This application aims to solve the above-mentioned technical problem, namely, how to ensure the convenience and reliability of sealing and fixing while using straight sample tubes to simplify the operation process.

[0006] This application provides a reaction apparatus, including:

[0007] The mounting body has a mounting cavity formed therein, and the mounting body is provided with an air inlet channel and an air outlet channel, both of which are connected to the mounting cavity;

[0008] A sample tube, one end of which is open, is inserted into the mounting cavity.

[0009] A gas inlet tube is inserted into the sample tube. One end of the gas inlet tube is connected to the gas inlet channel, and the other end extends to the bottom of the sample tube. An annular gap is formed between the gas inlet tube and the sample tube. The annular gap is connected to the gas outlet channel. Gas enters the bottom of the sample tube through the gas inlet tube and is discharged to the gas outlet channel through the annular gap.

[0010] A locking mechanism is provided for detachably securing the sample tube in the mounting cavity and forming a seal between the sample tube and the mounting cavity.

[0011] Optionally, the locking mechanism includes:

[0012] A sealing assembly includes a sealing ring and a clamping sleeve. The sealing ring is disposed between the inner wall of the mounting cavity and the outer wall of the sample tube. The clamping sleeve is sleeved on the outside of the sample tube and can extend into the mounting cavity along the axial direction of the sample tube.

[0013] A driving assembly is connected to the clamping sleeve. The mounting cavity has a working surface. The driving assembly drives the clamping sleeve to move closer to the sealing ring to press the sealing ring against the working surface, causing the sealing ring to undergo elastic deformation and clamp the sample tube.

[0014] Optionally, the driving component includes:

[0015] A lifting seat, which is connected to the clamping sleeve;

[0016] A guide rod is connected between the mounting body and the lifting seat, the lifting seat is slidably connected to the guide rod, and the guide rod is parallel to the sample tube;

[0017] A driver, which is mounted on the mounting body, has its output end connected to the lifting seat and is used to drive the lifting seat to move the clamping sleeve along the axial direction of the guide rod.

[0018] Optionally, the driver is a linear driver, which includes a cylinder and a piston rod. The cylinder is mounted on the mounting body. The piston rod has a guide surface, and the lifting seat has a rotating shaft and a roller rotatably connected to the rotating shaft.

[0019] When the piston rod reciprocates, the guide surface can contact the roller to push the lifting seat to move along the axial direction of the sample tube.

[0020] Optionally, the driving component further includes:

[0021] A first elastic element is sleeved on the guide rod, and both ends of the first elastic element can respectively abut against the lifting seat and the mounting body.

[0022] Optionally, the lifting seat has an installation through hole, the clamping sleeve passes through the installation through hole, the wall of the installation through hole is provided with an annular groove, and the outer wall of the clamping sleeve is provided with a first snap-fit ​​part, which engages with the annular groove.

[0023] Optionally, the annular groove is provided with a notch that extends through the lifting seat along the axial direction of the sample tube and communicates with the mounting through hole, so that the clamping sleeve can move along the axial direction of the sample tube through the first snap-fit ​​part and the notch.

[0024] Optionally, the lifting seat is further provided with a second locking part, and the outer wall of the pressing sleeve is further provided with a locking groove, the second locking part cooperating with the locking groove.

[0025] Optionally, the clamping sleeve includes:

[0026] The inner cylinder has one end extending into the mounting cavity;

[0027] An outer cylinder is slidably disposed outside the inner cylinder, and the outer cylinder is connected to the drive assembly;

[0028] The second elastic element is connected between the inner cylinder and the outer cylinder. When the driving assembly drives the outer cylinder to move toward the sealing ring, the outer cylinder can compress the second elastic element to drive the inner cylinder to move.

[0029] Optionally, the reaction apparatus is a chemisorption device.

[0030] When the above technical solution is adopted, the locking mechanism of this application utilizes the axial movement of the drive component and the deformation of the sealing element to complete the locking and sealing actions in one integrated manner, without the need for additional step-by-step operations. This greatly improves the convenience of sample tube installation and sealing reliability, and effectively avoids the gas leakage problem caused by complex pipeline connections or improper installation of sealing components in traditional devices. Attached Figure Description

[0031] The preferred embodiments of this application are described below with reference to the accompanying drawings, in which:

[0032] Figure 1This is a schematic diagram of the structure of a reaction apparatus according to an embodiment of this application;

[0033] Figure 2 yes Figure 1 Top view of the reaction apparatus;

[0034] Figure 3 for Figure 2 A cross-sectional view of the reaction apparatus along the AA direction;

[0035] Figure 4 for Figure 2 Cross-sectional view of the reaction apparatus along the BB direction;

[0036] Figure 5 for Figure 4 The enlarged view of a portion of the reaction device is intended to show the connection between the drive assembly and the clamping sleeve;

[0037] Figure 6 for Figure 1 The enlarged view of a portion of the reaction device is intended to show the connection between the drive assembly and the clamping sleeve;

[0038] Figure 7 This is a schematic diagram of the structure of a lifting seat according to an embodiment of this application. List of reference numerals in the attached diagram:

[0039] 1-Installation body, 10-Installation cavity, 101-Working surface, 11-Inlet channel, 12-Outlet channel, 2-Sample tube, 3-Gas inlet tube;

[0040] 4-Locking mechanism, 41-Sealing ring, 42-Pressure sleeve, 420-Second elastic element, 421-Inner cylinder, 422-Outer cylinder, 4221-First snap-fit ​​part, 4222-Snap-fit ​​groove, 43-Lifting seat, 430-Mounting through hole, 431-Annular groove, 432-Notch, 433-Second snap-fit ​​part, 44-Guide rod, 441-First elastic element, 45-Driver, 46-Cylinder body, 47-Piston rod, 471-Guide surface, 48-Roller. Detailed Implementation

[0041] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0042] It should be noted that in the description of this application, terms such as "upper," "lower," "left," "right," "inner," and "outer," which indicate direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. These terms are used merely for ease of description and do not indicate or imply that the relevant device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Please refer to Figure 1-4 The images show different views of the reaction apparatus provided in this application, specifically... Figure 1 This is a schematic diagram of the overall structure of the reaction apparatus. Figure 2 This is a top view of the reaction apparatus. Figure 3 for Figure 2 The cross-sectional view along the AA direction is used to show the axial cross-sectional structure inside the reaction apparatus. Figure 4 for Figure 2 A cross-sectional view along the BB direction, where the BB direction is perpendicular to the AA direction.

[0045] First, refer to Figure 1 The reaction apparatus includes a mounting body 1 serving as a basic support and gas path integration unit, a sample tube 2 for carrying the test sample, and a locking mechanism 4 for quickly fixing and sealing the sample tube 2. Specifically, referring to the reference... Figure 2 and Figure 3 , Figure 3 The internal structure and gas path layout of the main installation unit 1 are shown. For example... Figure 3As shown, the mounting body 1 is provided with an air inlet channel 11 and an air outlet channel 12, and also has a vertically extending mounting cavity 10. One end of the mounting cavity 10 is connected to both the air inlet channel 11 and the air outlet channel 12, and the other end is open. The sample tube 2 is inserted into the mounting cavity 10 with its open end facing upwards. A gas guide tube 3 is inserted inside the sample tube 2, and the sample is stored at the bottom of the sample tube 2. One end of the gas guide tube 3 is sealed and connected to the air inlet channel 11, and the other end extends to a position inside the sample tube 2 near the sample. During operation, the reaction gas enters through the air inlet channel 11, is guided by the gas guide tube 3 to the bottom of the sample tube 2, and fully contacts and reacts with the sample. The reacted gas flows upward along the annular gap formed between the outer wall of the gas guide tube 3 and the inner wall of the sample tube 2, and finally exits into the air outlet channel 12 through the connection between the mounting cavity 10 and the air outlet channel 12, forming a complete gas circulation.

[0046] To achieve rapid sealing and fixation of the sample tube 2, this application utilizes a locking mechanism 4 to detachably fix the sample tube 2 in the mounting cavity 10, thus forming a seal between the sample tube 2 and the mounting cavity 10. Specifically, the locking mechanism 4 employs an axially movable drive assembly, and through a lifting action, it can compress and deform the sealing element, thereby simultaneously locking the sample tube 2 and sealing the interface. Conversely, a reset action can release the locking and sealing state, facilitating the rapid replacement of the sample tube 2.

[0047] The working principle of the locking mechanism 4 will be described in detail below with reference to the accompanying drawings and embodiments.

[0048] In one embodiment, in conjunction with reference to Figure 1 , Figure 3 and Figure 4 The locking mechanism 4 includes a sealing assembly and a driving assembly. The sealing assembly includes an annular sealing ring 41 and a clamping sleeve 42. The sealing ring 41 is disposed between the inner wall of the mounting cavity 10 and the outer wall of the sample tube 2, and is located at a pre-set annular limiting step on the inner wall of the mounting cavity 10. This annular limiting step forms a working surface 101 for supporting the sealing ring 41. The sealing ring 41 is made of an elastic wear-resistant material. Its inner diameter fits tightly with the outer wall of the sample tube 2, and its outer diameter is adapted to the inner wall of the mounting cavity 10, possessing the ability to deform in both the radial and axial directions. The clamping sleeve 42 is sleeved on the outside of the sample tube 2. Its upper outer peripheral wall slides in fit with the inner wall of the mounting cavity 10, and its lower part extends to the outside of the mounting cavity 10. The inner wall of the clamping sleeve 42 maintains a clearance fit with the outer wall of the sample tube 2 to ensure smooth axial movement. The drive assembly is mounted on the mounting body 1 and connected to the lower part of the clamping sleeve 42. Specifically, it can be in the form of threaded drive, lever drive or pneumatic drive. The drive assembly can drive the clamping sleeve 42 to move along the sample tube 2 axially toward the sealing ring 41.

[0049] Furthermore, the working process of the locking mechanism 4 is as follows: After the open end of the sample tube 2 is inserted into the mounting cavity 10 to the preset position, the sealing ring 41 is pre-installed on the annular limiting step and fits against the outer wall of the sample tube 2. The drive assembly is activated, and the drive assembly drives the clamping sleeve 42 to extend upward along the axial direction of the sample tube 2 into the mounting cavity 10. As the clamping sleeve 42 continues to move upward, its top end gradually presses against the bottom of the sealing ring 41 and applies axial pressure to the sealing ring 41. Under the action of axial pressure, the sealing ring 41 is tightly pressed between the top end of the clamping sleeve 42 and the working surface 101 of the inner wall of the mounting cavity 10, thereby undergoing radial elastic deformation. The inner side is squeezed against the outer wall of the sample tube 2, and the outer side is squeezed against the inner wall of the mounting cavity 10. Through the deformation of the sealing ring 41, on the one hand, an airtight seal is achieved between the sample tube 2 and the mounting cavity 10, and on the other hand, an interference fit is formed between the sample tube 2 and the sealing ring 41, thereby clamping and fixing the sample tube 2. When it is necessary to disassemble the sample tube 2, the drive assembly drives the clamping sleeve 42 to reset downwards, the axial pressure on the sealing ring 41 is released and it returns to its original shape, the clamping and sealing constraints of the sample tube 2 are released, and the sample tube 2 can be taken out from the mounting cavity 10.

[0050] The following section will describe in detail the specific structure and working principle of the driving component with reference to the accompanying drawings and embodiments.

[0051] In one embodiment, in conjunction with reference to Figure 3 and Figure 4 The drive assembly includes a lifting seat 43, a guide rod 44, and a driver 45. The lifting seat 43 is fixedly connected to the clamping sleeve 42, forming a movable clamping unit. The guide rod 44 is fixedly mounted on the mounting body 1, with its axis parallel to the axis of the sample tube 2. The lifting seat 43 and the guide rod 44 form a sliding pair, allowing the lifting seat 43 to reciprocate smoothly along the axis of the guide rod 44. The driver 45 can take various forms, such as a linear motor, a cylinder, or a manual screw drive mechanism. The main body of the driver 45 is fixedly mounted on the mounting body 1, and its output end is connected to the lifting seat 43, providing power for the linear motion of the lifting seat 43.

[0052] Furthermore, the operation of the drive assembly is as follows: When it is necessary to lock the sample tube 2, the driver 45 is activated, and its output end pushes the lifting seat 43, causing it to slide along the guide rod 44 towards the mounting cavity 10. The lifting seat 43 drives the connected clamping sleeve 42 to move synchronously, transmitting axial thrust to the sealing ring 41, completing the clamping and locking action. The guide rod 44 ensures that the lifting seat 43 and the clamping sleeve 42 always move in a straight line, preventing them from deflecting or jamming during movement, thereby ensuring the uniform application of clamping force and the reliability of the action. When it is necessary to remove the sample tube 2, the driver 45 reverses its action, driving the lifting seat 43 to move the clamping sleeve 42 away from the mounting cavity 10 and retract, releasing the clamping force on the sealing ring 41.

[0053] In a specific implementation, referencing Figure 1 and Figure 4 A first elastic element 441 is sleeved on the guide rod 44, and both ends of the first elastic element 441 can respectively abut against the lifting seat 43 and the mounting body 1. Specifically, the first elastic element 441 is preferably a cylindrical helical spring. The first elastic element 441 is located on the guide rod 44 section between the lifting seat 43 and the mounting body 1. When the driver 45 drives the lifting seat 43 to move closer to the mounting body 1, that is, when it drives the pressing sleeve 42 to move upward to press the sealing ring 41, the lifting seat 43 gradually compresses the first elastic element 441, so that the first elastic element 441 accumulates elastic potential energy. When the driver 45 stops outputting driving force or reverses driving, the first elastic element 441 can release elastic potential energy and generate a reverse thrust on the lifting seat 43. The first elastic element 441 has multiple functions: on the one hand, during the clamping process, the compression deformation of the elastic element can play a buffering role, preventing the lifting seat 43 and the clamping sleeve 42 from causing rigid impact on the sealing ring 41 or the sample tube 2 due to the sudden increase in driving force; on the other hand, during the unlocking and reset phase, the reset elastic force of the first elastic element 441 can also drive the lifting seat 43 and the clamping sleeve 42 to automatically descend and reset, ensuring the smooth disassembly of the sample tube 2 and improving the safety and reliability of the device.

[0054] The following section will continue to describe in detail, with reference to the accompanying drawings and embodiments, the specific manner in which the driver 45 drives the lifting seat 43.

[0055] In one embodiment, the linear actuator 45 is preferably a cylinder. The cylinder includes a cylinder body 46 and a piston rod 47. The cylinder body 46 is fixedly mounted on the side of the mounting body 1 by a bracket, and the axial direction of the cylinder body 46 is perpendicular to the axial direction of the sample tube 2. The piston rod 47 can reciprocate along the axial direction of the cylinder body 46. The outer surface of the piston rod 47 is provided with a guide surface 471, which is a wedge-shaped inclined surface structure with a high position and a low position that transition sequentially along the extension direction of the piston rod 47. The high position and the low position are connected by a smooth inclined surface. A rotating shaft is fixedly provided on the lifting seat 43 at a position corresponding to the guide surface 471. A roller 48 is rotatably sleeved on the rotating shaft, and the outer peripheral surface of the roller 48 keeps in contact with the guide surface 471. When the piston rod 47 reciprocates, the guide surface 471 can roll in contact with the roller 48, and the change in the height of the inclined surface pushes the lifting seat 43 to move along the axial direction of the sample tube 2. In a preferred embodiment, the rotating assembly that mates with the lifting seat 43 and the guide surface 471 adopts a structure combining a shaft and a bearing. That is, the shaft is set on the lifting seat 43, and the bearing is fixedly sleeved on its extended end. This combination helps to reduce rotational resistance, so that when the piston rod 47 drives the lifting seat 43 to rise and fall, the transmission between the two is smoother and more stable, thereby making the sealing and unlocking actions smoother.

[0056] The locking and unlocking processes of this drive method will be described in detail below.

[0057] Locking process: First, the sample tube 2 is inserted axially into the mounting cavity 10, and the sealing ring 41 is placed in the preset sealing position. The clamping sleeve 42 is pre-installed on the lifting seat 43. At this time, the roller 48 is in contact with the lower position of the guide surface 471, and the entire mechanism is in a state of waiting to be locked. When it is necessary to seal and lock the sample tube 2, the piston rod 47 of the drive device extends outward under the action of the driving force, driving the guide surface 471 on the piston rod 47 to move synchronously. During this process, the roller 48 gradually slides from the lower position to the higher position along the guide surface 471 and is continuously pushed up by the piston rod 47. Since the roller 48 is rigidly connected to the lifting seat 43 through the rotating shaft, the pushing force drives the lifting seat 43 to slide upward along the guide rod 44, thereby driving the clamping sleeve 42 to move towards the mounting cavity 10. Finally, the clamping sleeve 42 forms an axial clamp on the sealing ring 41, realizing the reliable locking and sealing of the sample tube 2.

[0058] Release process: When it is necessary to remove sample tube 2, the piston rod 47 of the drive device retracts in the opposite direction, and the guide surface 471 moves synchronously in the opposite direction with the piston rod 47, causing the roller 48 to gradually fall back from the high position to the low position along the guide surface 471. Under the action of gravity or the elastic force of the auxiliary reset spring, the lifting seat 43 drives the clamping sleeve 42 and the roller 48 to move downward as a whole along the guide rod 44. The clamping sleeve 42 gradually moves away from the mounting cavity 10, and the clamping force on the sealing ring 41 is released, allowing the sample tube 2 to be easily removed.

[0059] In this embodiment, the guide surface 471 with a wedge-shaped inclined surface structure on the piston rod 47 can smoothly convert the horizontal reciprocating motion of the piston rod 47 into the axial lifting motion of the lifting seat 43, eliminating the need for a complex reversing transmission mechanism and simplifying the overall structure. At the same time, the smooth transition between the high and low positions of the guide surface 471 makes it easy to control the lifting speed and displacement of the lifting seat 43, enabling the smooth adjustment of the clamping force of the sealing ring 41, avoiding rigid impact, and ensuring the stability of the sealing and locking process.

[0060] The specific structure of the clamping sleeve 42 will be described in detail below with reference to the accompanying drawings and embodiments.

[0061] In one embodiment, such as Figure 5 and Figure 6As shown, the clamping sleeve 42 includes an inner cylinder 421 and an outer cylinder 422. Specifically, one end of the inner cylinder 421 extends into the mounting cavity 10, and the top end of the extended end can abut against the bottom of the sealing ring 41. The inner diameter of the inner cylinder 421 maintains a clearance fit with the outer wall of the sample tube 2 to ensure smooth axial movement, and the outer peripheral wall of the inner cylinder 421 slides against the inner wall of the mounting cavity 10 to improve guiding stability. The outer cylinder 422 is slidably disposed outside the inner cylinder 421, and the outer peripheral wall of the outer cylinder 422 is connected to the lifting seat 43, and can rise and fall synchronously with the lifting seat 43. Furthermore, a second elastic element 420 is connected between the inner cylinder 421 and the outer cylinder 422. The second elastic element 420 is preferably a cylindrical helical compression spring. The second elastic element 420 is sleeved inside the outer cylinder 422. The top end of the second elastic element 420 abuts against the annular boss at the bottom of the inner cylinder 421, and the bottom end of the second elastic element 420 abuts against the inner bottom wall of the outer cylinder 422, forming an axially expandable elastic connection structure. When the drive assembly drives the outer cylinder 422 to move towards the sealing ring 41, the outer cylinder 422 moves upward and applies a compressive force to the second elastic element 420. After being compressed, the second elastic element 420 transmits the driving force to the inner cylinder 421, thereby causing the inner cylinder 421 to move synchronously towards the sealing ring 41.

[0062] The design of the split-type clamping sleeve 42 and the second elastic element 420 provided in this application has significant buffering and pressure adaptive adjustment functions. Specifically, in the initial clamping stage, the outer cylinder 422 drives the inner cylinder 421 to smoothly approach the sealing ring 41 through the second elastic element 420, avoiding rigid contact. When the top of the inner cylinder 421 presses against the sealing ring 41 and begins to apply pressure, as the outer cylinder 422 continues to rise, the second elastic element 420 is further compressed. Its elastic deformation can absorb the excessive driving force transmitted by the drive assembly, so that the clamping force acting on the sealing ring 41 is always kept within a reasonable range. This prevents sealing failure due to insufficient pressure and avoids permanent deformation of the sealing ring 41 or damage to the sample tube 2 due to excessive pressure.

[0063] The following section will continue to describe in detail the specific connection method between the outer cylinder 422 and the lifting seat 43, in conjunction with the accompanying drawings and embodiments.

[0064] In one embodiment, such as Figure 5 and Figure 6 As shown, the lifting seat 43 has an installation through hole 430 that matches the outer diameter of the outer cylinder 422. The outer cylinder 422 passes through the installation through hole 430. The wall of the installation through hole 430 is provided with a ring groove 431 around the circumference. The outer wall of the outer cylinder 422 is provided with a first snap-fit ​​part 4221 corresponding to the position of the ring groove 431.

[0065] In this embodiment, considering ease of processing and assembly, the first snap-fit ​​part 4221 adopts a combination structure of a connecting shaft and a bearing. Specifically, the connecting shaft is radially connected to the side wall of the outer cylinder 422 via a thread, and the bearing is fixed to the protruding end of the connecting shaft. Together, they form a snap-fit ​​protrusion structure that fits the annular groove 431. This design eliminates the need to process an annular protrusion on the outer wall of the outer cylinder 422, simplifying the processing difficulty and cost of the outer cylinder. At the same time, the threaded connection of the connecting shaft facilitates disassembly and maintenance, while the bearing helps reduce component wear and also makes the axial linkage between the lifting seat 43 and the outer cylinder 422 smoother. Through this snap-fit ​​engagement, when the lifting seat 43 moves axially, it can push the first snap-fit ​​part 4221 to move synchronously through the groove wall of the annular groove 431, thereby driving the outer cylinder 422 and the inner cylinder 421 to move axially together.

[0066] Furthermore, in order to enhance the reliability of the connection between the outer cylinder 422 and the lifting seat 43, a second locking part 433 is also provided on the lifting seat 43. The second locking part 433 is specifically an elastic locking pin threaded on the side wall of the lifting seat 43. The elastic locking pin has a built-in spring structure, and its end is kept in an extended state under the action of the spring force. Correspondingly, a plurality of locking grooves 4222 are provided circumferentially on the outer wall of the outer cylinder 422. The size of the locking grooves 4222 is adapted to the end of the elastic locking pin. After the outer cylinder 422 passes through the mounting through hole 430, the elastic force of the elastic pin causes its end to automatically engage with the locking groove 4222 of the outer cylinder 422. The cooperation between the elastic pin and the locking groove 4222 not only forms a mechanical positioning, but also achieves a positioning damping effect through the friction between the spring force and the locking surface. For example, when the lifting seat 43 drives the outer cylinder 422 to move axially or when the outer cylinder 422 undergoes a slight displacement due to vibration, the damping force between the end of the elastic pin and the wall of the locking groove 4222 can slow down the displacement speed and prevent the components from shifting or impacting. During the process of the lifting seat 43 driving the outer cylinder 422 to rise and fall axially, this combination of positioning and damping can form a stable connection, which helps to prevent the outer cylinder 422 from falling off the lifting seat 43 due to vibration, force fluctuations, etc., while improving the overall structural stability.

[0067] Furthermore, in order to achieve quick assembly and disassembly between the lifting seat 43 and the clamping sleeve 42, refer to Figure 7A notch 432 is provided in the annular groove 431 of the lifting seat 43. The notch 432 extends axially through the upper and lower end faces of the lifting seat 43, and the width of the notch 432 is adapted to the radial dimension of the first snap-fit ​​portion 4221 on the outer wall of the clamping sleeve 42. The notch 432 communicates with the interior of the mounting through hole 430 to form a channel for the first snap-fit ​​portion 4221 to enter and exit. During assembly, the first snap-fit ​​portion 4221 of the outer cylinder 422 can be aligned with the notch 432, and the clamping sleeve 42 can be inserted into the mounting through hole 430 along the axial direction of the sample tube 2. After assembly, the first snap-fit ​​portion 4221 enters the annular groove 431. By rotating the outer cylinder 422, the first snap-fit ​​portion 4221 is displaced from the notch 432, thus achieving snap-fit. When disassembly or adjustment is required, the clamping sleeve 42 is rotated in the reverse direction to align the first snap-fit ​​part 4221 with the notch 432, allowing the clamping sleeve 42 to be removed axially from the mounting through hole 430. This structure enables quick assembly and disassembly of the clamping sleeve 42 and the lifting seat 43. This quick assembly and disassembly facilitates the replacement of the sealing ring 41. That is, when the sealing ring 41 wears or ages due to long-term use, the clamping sleeve 42 can be quickly removed using only the notch 432 structure, allowing for the replacement of the sealing ring 41 and simplifying the maintenance process. Of course, the quick assembly and disassembly of the clamping sleeve 42 and the lifting seat 43 also provides convenient conditions for the replacement of the sample tube 22. When the sample tube 2 needs to be replaced, the quick disassembly of the clamping sleeve 42 can simultaneously release its clamping state on the sealing ring 41, thereby releasing the axial constraint on the mounting cavity, allowing the sample tube 2 to be freed from the constraint of the sealing ring 41, facilitating smooth insertion and removal.

[0068] In one embodiment, the reaction device is a chemisorption apparatus, specifically a chemisorption instrument. This chemisorption instrument, with its quick-sealing and locking structure between the sample tube 2 and the mounting cavity 10, and its integrated gas path design, enables rapid replacement of the sample tube 2, effectively improving the testing efficiency and ease of operation of the chemisorption apparatus.

[0069] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A reaction apparatus, characterized in that, include: The mounting body (1) has a mounting cavity (10) inside. The mounting body (1) is provided with an air inlet channel (11) and an air outlet channel (12). The air inlet channel (11) and the air outlet channel (12) are both connected to the mounting cavity (10). The sample tube (2) has an open end, and the open end of the sample tube (2) is inserted into the mounting cavity (10); A gas inlet tube (3) is inserted into the sample tube (2). One end of the gas inlet tube (3) is connected to the inlet channel (11), and the other end extends to the bottom of the sample tube (2). An annular gap is formed between the gas inlet tube (3) and the sample tube (2). The annular gap is connected to the outlet channel (12). Gas enters the bottom of the sample tube (2) through the gas inlet tube (3) and is discharged to the outlet channel (12) through the annular gap. A locking mechanism (4) is used to detachably fix the sample tube (2) in the mounting cavity (10) and form a seal between the sample tube (2) and the mounting cavity (10).

2. The reaction apparatus according to claim 1, characterized in that, The locking mechanism (4) includes: A sealing assembly includes a sealing ring (41) and a clamping sleeve (42). The sealing ring (41) is disposed between the inner wall of the mounting cavity (10) and the outer wall of the sample tube (2). The clamping sleeve (42) is sleeved on the sample tube (2) and can extend into the mounting cavity (10) along the axial direction of the sample tube (2). A drive assembly is connected to the clamping sleeve (42). The mounting cavity (10) has a working surface (101). The drive assembly drives the clamping sleeve (42) to move closer to the sealing ring (41) to press the sealing ring (41) against the working surface (101), so that the sealing ring (41) undergoes elastic deformation to clamp the sample tube (2).

3. The reaction apparatus according to claim 2, characterized in that, The driving component includes: The lifting seat (43) is connected to the clamping sleeve (42); A guide rod (44) is connected between the mounting body (1) and the lifting seat (43), the lifting seat (43) is slidably connected to the guide rod (44), and the guide rod (44) is parallel to the sample tube (2); A driver (45) is disposed on the mounting body (1). The output end of the driver (45) is connected to the lifting seat (43) and is used to drive the lifting seat (43) to move the pressing sleeve (42) along the axial direction of the guide rod (44).

4. The reaction apparatus according to claim 3, characterized in that, The driver (45) is a linear driver (45), which includes a cylinder (46) and a piston rod (47). The cylinder (46) is mounted on the mounting body (1). The piston rod (47) is provided with a guide surface (471). The lifting seat (43) is provided with a rotating shaft and a roller (48) rotatably connected to the rotating shaft. When the piston rod (47) reciprocates, the guide surface (471) can contact the roller (48) to push the lifting seat (43) to move along the axial direction of the sample tube (2).

5. The reaction apparatus according to claim 3, characterized in that, The driving component also includes: A first elastic element (441) is sleeved on the guide rod (44), and both ends of the first elastic element (441) can respectively abut against the lifting seat (43) and the mounting body (1).

6. The reaction apparatus according to claim 3, characterized in that, The lifting seat (43) is provided with an installation through hole (430), the clamping sleeve (42) passes through the installation through hole (430), the hole wall of the installation through hole (430) is provided with an annular groove (431), the outer wall of the clamping sleeve (42) is provided with a first snap-fit ​​part (4221), and the first snap-fit ​​part (4221) engages with the annular groove (431).

7. The reaction apparatus according to claim 6, characterized in that, The annular groove (431) is provided with a notch (432), which penetrates the lifting seat (43) along the axial direction of the sample tube (2) and communicates with the mounting through hole (430) so that the clamping sleeve (42) can move along the axial direction of the sample tube (2) through the first snap-fit ​​part (4221) and the notch (432).

8. The reaction apparatus according to claim 6, characterized in that, The lifting seat (43) is also provided with a second snap-fit ​​part (433), and the outer wall of the pressing sleeve (42) is also provided with a snap-fit ​​groove (4222), and the second snap-fit ​​part (433) cooperates with the snap-fit ​​groove (4222).

9. The reaction apparatus according to claim 2, characterized in that, The clamping sleeve (42) includes: The inner cylinder (421) has one end extending into the mounting cavity (10); An outer cylinder (422) is slidably disposed outside the inner cylinder (421), and the outer cylinder (422) is connected to the drive assembly; The second elastic element (420) is connected between the inner cylinder (421) and the outer cylinder (422). When the driving assembly drives the outer cylinder (422) to move toward the sealing ring (41), the outer cylinder (422) can compress the second elastic element (420) to drive the inner cylinder (421) to move.

10. The reaction apparatus according to any one of claims 1 to 9, characterized in that, The reaction device is a chemical adsorption device.

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