Reaction device

Abstract

The invention relates to the technical field of material performance testing, in particular to a reaction device, and aims to solve the problem that when a straight sample tube is adopted to simplify the operation process, the convenience of sealing and fixing is poor. Therefore, the reaction device provided by the invention comprises a mounting main body in which a mounting cavity is formed, the mounting main body is provided with a gas inlet channel and a gas outlet channel, and the gas inlet channel and the gas outlet channel are both communicated with the mounting cavity; the open end of the sample tube is inserted into the mounting cavity; gas enters the bottom of the sample tube from the gas entraining tube and then is discharged to the gas outlet channel through the annular gap; the locking mechanism is used for detachably fixing the sample tube in the mounting cavity and enabling the sample tube and the mounting cavity to be sealed. According to the locking mechanism, locking and sealing actions can be integrally completed, and the mounting convenience and sealing reliability of the sample tube are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material performance testing, and specifically provides a reaction device. BACKGROUND

[0002] A chemical adsorption instrument is a key device for studying the chemical properties of a material surface, and its core principle is based on chemical adsorption, that is, adsorbate molecules and solid surface atoms form chemical adsorption bonds through electron transfer, exchange or sharing. The instrument is widely used in the fields of catalyst characterization, surface science and material research, and can provide key information such as the number of catalyst active sites, redox performance, surface acidity and alkalinity, thereby providing data support for catalyst design and reaction mechanism research. However, the mainstream chemical adsorption instrument currently available generally adopts a U-shaped sample tube, which requires the sample to be placed in the tube before testing, and then the gas inlet pipe and the gas outlet pipe are respectively sealed and installed at both ends of the sample tube. This structure leads to a very cumbersome process of disassembly, cleaning and reassembly after the test is completed, which not only is low in efficiency, but also easily causes problems such as breakage of the sample tube and poor sealing of the interface, directly affecting the accuracy and reliability of the test and increasing the time and cost consumption.

[0003] To simplify the structure, the applicant's previous patent application proposes an improved scheme, which adopts a straight sample tube with an open end, and integrates a gas inlet channel, a gas outlet channel and a vertical mounting cavity on the mounting body, inserts the open end of the sample tube into the mounting cavity, and guides the gas flow by using the built-in gas guide pipe, thereby realizing the introduction and discharge of reaction gas. This design effectively avoids the disadvantages of the traditional U-shaped tube which needs to be connected at both ends. At the same time, the single-end opening of the straight sample tube and the easy-to-hold and position outer shape structure are more suitable for the standardized operation logic of automatic equipment than the U-shaped tube which needs to avoid multiple pipes. Without complex multidirectional positioning adjustment, the robot can directly and stably hold the sample tube, which helps to promote the development of the chemical adsorption instrument towards automatic testing. However, in this scheme, how to realize quick and reliable sealing and fixing between the open end of the sample tube and the mounting cavity is still a key problem. If the sealing is not tight, it will cause gas leakage and affect the test accuracy. If the fixing is not convenient, the sample cannot be replaced quickly, and the convenience and automation adaptation advantages brought by the straight sample tube cannot be fully realized.

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

[0005] The present application aims to solve the above technical problems, that is, how to ensure the convenience and reliability of sealing and fixing while adopting a straight sample tube to simplify the operation process.

[0006] The present application provides a reaction device, comprising:

[0007] A mounting body, in which a mounting cavity is formed, and an air inlet channel and an air outlet channel are arranged on the mounting body and communicate with the mounting cavity;

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

[0009] An air guide tube, which is inserted into the sample tube, one end of the air guide tube communicates with the air inlet channel, and the other end extends to the bottom of the sample tube, an annular gap is formed between the air guide tube and the sample tube, the annular gap communicates with the air outlet channel, and the gas enters the bottom of the sample tube from the air guide tube and is discharged to the air outlet channel through the annular gap;

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

[0011] Optionally, the locking mechanism comprises:

[0012] A sealing assembly comprising a sealing ring and a pressing sleeve, the sealing ring is arranged between the inner wall of the mounting cavity and the outer wall of the sample tube, and the pressing 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 connected with the pressing sleeve, the mounting cavity has a working surface, the driving assembly drives the pressing sleeve to move towards the sealing ring to press the sealing ring against the working surface, so that the sealing ring is elastically deformed to clamp the sample tube.

[0014] Optionally, the driving assembly comprises:

[0015] A lifting seat connected with the pressing sleeve;

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

[0017] A driver arranged on the mounting body, an output end of the driver is connected with the lifting seat, and the driver is used to drive the lifting seat to move the pressing sleeve along the axial direction of the guide rod.

[0018] Optionally, the driver is a linear driver, the linear driver comprises a cylinder body and a piston rod, the cylinder body is arranged on the mounting body, a guide surface is arranged on the piston rod, a rotating shaft and a roller in rotating connection with the rotating shaft are arranged on the lifting seat;

[0019] The guiding surface can contact the roller to push the lifting seat to move along the axial direction of the sample tube when the piston rod reciprocates.

[0020] Optionally, the driving assembly further comprises:

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

[0022] Optionally, a mounting through hole is formed in the lifting seat, the compression sleeve is arranged in the mounting through hole, a hole wall of the mounting through hole is provided with an annular groove, an outer wall of the compression sleeve is provided with a first clamping portion, and the first clamping portion is clamped and matched with the annular groove.

[0023] Optionally, the annular groove is provided with a notch, the notch penetrates the lifting seat along the axial direction of the sample tube, and the notch is communicated with the mounting through hole, so that the compression sleeve moves along the axial direction of the sample tube through the first clamping portion and the notch.

[0024] Optionally, the lifting seat is further provided with a second clamping portion, and an outer wall of the compression sleeve is further provided with a clamping groove, and the second clamping portion is matched with the clamping groove.

[0025] Optionally, the compression sleeve comprises:

[0026] An inner cylinder, one end of which extends into the mounting cavity;

[0027] An outer cylinder which is slidingly arranged outside the inner cylinder, and the outer cylinder is connected with the driving assembly;

[0028] A second elastic member which is connected between the inner cylinder and the outer cylinder, and when the driving assembly drives the outer cylinder to move towards the sealing ring, the outer cylinder can compress the second elastic member to drive the inner cylinder to move.

[0029] Optionally, the reaction device is a chemical adsorption equipment.

[0030] In the technical solution, the locking mechanism utilizes the axial movement of the driving assembly and the deformation of the sealing element to achieve the locking and sealing functions integrally, without additional step-by-step operation, thereby greatly improving the convenience and sealing reliability of the sample tube installation, and effectively avoiding the gas leakage problem caused by the complex pipeline connection or improper installation of the sealing element in the traditional device. BRIEF DESCRIPTION OF DRAWINGS

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

[0032] Figure 1is a structural schematic diagram of a reaction device according to an embodiment of the present application;

[0033] Figure 2 is Figure 1 is a top view of the reaction device in

[0034] Figure 3 is Figure 2 is a sectional view of the reaction device in along A-A direction in

[0035] Figure 4 is Figure 2 is a sectional view of the reaction device in along B-B direction in

[0036] Figure 5 is Figure 4 is an enlarged view of a partial structure of the reaction device in, aiming to show the connection relationship between the driving assembly and the compression sleeve;

[0037] Figure 6 is Figure 1 is an enlarged view of a partial structure of the reaction device in, aiming to show the connection relationship between the driving assembly and the compression sleeve;

[0038] Figure 7 is a structural schematic diagram of a lifting seat according to an embodiment of the present application. List of reference signs:

[0039] 1 - mounting body, 10 - mounting cavity, 101 - working surface, 11 - air inlet channel, 12 - air outlet channel, 2 - sample tube, 3 - air induction tube;

[0040] 4 - locking mechanism, 41 - sealing ring, 42 - compression sleeve, 420 - second elastic member, 421 - inner cylinder, 422 - outer cylinder, 4221 - first clamping portion, 4222 - clamping groove, 43 - lifting seat, 430 - mounting through hole, 431 - annular groove, 432 - notch, 433 - second clamping portion, 44 - guide rod, 441 - first elastic member, 45 - driver, 46 - cylinder body, 47 - piston rod, 471 - guide surface, 48 - roller. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application, and are not used to limit the protection scope of the present application. Those skilled in the art can make adjustments according to the needs in order to adapt to specific application occasions.

[0042] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the related devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the ordinal numbers "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0043] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Please refer to Figures 1-4 , which respectively show different views of the reaction device provided by the present application, specifically, Figure 1 is a schematic diagram of the overall structure of the reaction device, Figure 2 is a top view of the reaction device, Figure 3 is Figure 2 is a sectional view along the A-A direction, for showing the axial sectional structure inside the reaction device, Figure 4 is Figure 2 is a sectional view along the B-B direction, wherein the B-B direction is perpendicular to the A-A direction.

[0045] First, refer to Figure 1 , the reaction device includes a mounting main body 1 as a basic bearing and gas path integrated unit, a sample tube 2 for bearing the sample to be tested, and a locking mechanism 4 for realizing fast fixation and sealing of the sample tube 2. Specifically, refer to Figure 2 and Figure 3 , Figure 3 shows the internal structure and gas path layout of the mounting main body 1. As Figure 3As shown, the installation body 1 is provided with an air inlet channel 11 and an air outlet channel 12, and a vertically extending installation cavity 10 is also provided, one end of the installation cavity 10 is communicated with the air inlet channel 11 and the air outlet channel 12 respectively, and the other end is an open end. The open end of the sample tube 2 is inserted into the installation cavity 10 from the open end of the installation cavity 10. The inside of the sample tube 2 is provided with an air guide tube 3, and the bottom of the sample tube 2 is stored with a sample. One end of the air guide tube 3 is in sealed communication with the air inlet channel 11, and the other end extends to a position close to the sample in the sample tube 2. During operation, the reaction gas enters from the air inlet channel 11, is guided by the air guide tube 3 to the bottom of the sample tube 2, fully contacts and reacts with the sample, and the reacted gas flows upward along the annular gap between the outer wall of the air guide tube 3 and the inner wall of the sample tube 2, and finally flows into the air outlet channel 12 through the communication port between the installation cavity 10 and the air outlet channel 12, forming a complete gas circulation.

[0046] In order to realize the rapid sealing and fixing of the sample tube 2, the locking mechanism 4 is used to detachably fix the sample tube 2 in the installation cavity 10, and to form a seal between the sample tube 2 and the installation cavity 10. Specifically, the locking mechanism 4 adopts an axially movable driving assembly, and through a lifting action, the sealing element can be compressed and deformed, thereby realizing the locking of the sample tube 2 and the sealing of the interface at the same time. Conversely, through a reset action, the locking and sealing state can be released, facilitating the rapid replacement of the sample tube 2.

[0047] The working principle of the locking mechanism 4 will be described in detail below in combination with the drawings and examples.

[0048] In one embodiment, in combination 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 a ring-shaped sealing ring 41 and a compression sleeve 42. The sealing ring 41 is arranged between the inner wall of the installation cavity 10 and the outer wall of the sample tube 2, and is arranged at a pre-set annular limiting step of the inner wall of the installation cavity 10. The annular limiting step forms a working surface 101 for bearing the sealing ring 41. The sealing ring 41 is made of elastic and wear-resistant material, and its inner diameter is tightly fitted with the outer wall of the sample tube 2, and its outer diameter is adapted to the inner wall of the installation cavity 10, and has the ability to deform in both radial and axial directions. The compression sleeve 42 is sleeved on the outer wall of the sample tube 2, the upper part of the outer wall is in sliding fit with the inner wall of the installation cavity 10, the lower part extends to the outside of the installation cavity 10, and the inner wall of the compression sleeve 42 is in gap fit with the outer wall of the sample tube 2 to ensure smooth axial movement. The driving assembly is installed on the installation body 1 and connected with the lower part of the compression sleeve 42, which can be in the form of threaded transmission, lever transmission or pneumatic transmission, and the driving assembly can drive the compression sleeve 42 to move axially along the sample tube 2 towards the sealing ring 41.

[0049] Further, the working process of the locking mechanism 4 is as follows: when the open end of the sample tube 2 is inserted into the installation cavity 10 to the preset position, the sealing ring 41 is preloaded on the annular limiting step and is attached to the outer wall of the sample tube 2. The driving assembly is started, and the driving assembly drives the compression sleeve 42 to extend into the installation cavity 10 along the axial direction of the sample tube 2 upward. With the continuous upward movement of the compression sleeve 42, the top end thereof gradually abuts against the bottom of the sealing ring 41 and applies axial pressure to the sealing ring 41. Under the action of the axial pressure, the sealing ring 41 is tightly compressed between the top end of the compression sleeve 42 and the working surface 101 of the inner wall of the installation cavity 10, and then is elastically deformed radially, and the inner side is extruded to the outer wall of the sample tube 2, and the outer side is extruded to the inner wall of the installation cavity 10. Through the deformation of the sealing ring 41, on the one hand, the air-tight sealing between the sample tube 2 and the installation cavity 10 is realized, and on the other hand, the interference fit between the sample tube 2 and the sealing ring 41 is formed, and then the sample tube 2 is clamped and fixed. When it is needed to disassemble the sample tube 2, the driving assembly drives the compression sleeve 42 to reset downward, the axial pressure applied to the sealing ring 41 is released and the original shape of the sealing ring 41 is restored, the clamping and sealing constraint of the sample tube 2 is released, and then the sample tube 2 can be taken out from the installation cavity 10.

[0050] The specific structure and working principle of the driving assembly will be described in detail below in combination with the drawings and examples.

[0051] In one embodiment, in combination with reference to Figure 3 and Figure 4 , the driving assembly comprises a lifting seat 43, a guide rod 44 and a driver 45. The lifting seat 43 is fixedly connected with the compression sleeve 42, and constitutes a compression unit which can move as a whole. The guide rod 44 is fixedly installed on the installation main body 1, and the axial direction thereof is parallel to the axial direction of the sample tube 2. The lifting seat 43 and the guide rod 44 constitute a sliding pair, so that the lifting seat 43 can stably reciprocate along the axial direction of the guide rod 44. The driver 45 can adopt various forms, such as a linear motor, an air cylinder or a manual screw driving mechanism. The main body of the driver 45 is fixedly arranged on the installation main body 1, and the output end thereof is connected with the lifting seat 43, so as to provide linear motion power for the lifting seat 43.

[0052] Further, the working process of the driving assembly is as follows: when it is needed to lock the sample tube 2, the driver 45 is started, and the output end thereof pushes the lifting seat 43 to make it slide along the guide rod 44 to the direction close to the installation cavity 10. The lifting seat 43 drives the compression sleeve 42 connected therewith to move synchronously, and transmits the axial thrust to the sealing ring 41, so as to complete the compression and sealing and locking actions. The guide rod 44 functions to ensure that the lifting seat 43 and the compression sleeve 42 always move along a straight line, and prevent them from being deflected or stuck during the movement, so as to ensure the uniform application of the compression force and the reliability of the action. When it is needed to take out the sample tube 2, the driver 45 is reversely operated to drive the lifting seat 43 to retreat away from the installation cavity 10, and the compression force applied to the sealing ring 41 is released.

[0053] In one specific implementation, in combination with reference to Figure 1 and Figure 4 A first elastic member 441 is sleeved on the guide rod 44, and the two ends of the first elastic member 441 can respectively abut against the lifting seat 43 and the mounting body 1. Specifically, the first elastic member 441 preferably adopts a cylindrical coil spring. The segment of the guide rod 44 between the lifting seat 43 and the mounting body 1 is located in the first elastic member 441. When the driver 45 drives the lifting seat 43 to move in the direction of approaching the mounting body 1, i.e., drives the compression sleeve 42 to move upward to compress the sealing ring 41, the lifting seat 43 gradually compresses the first elastic member 441, so that the first elastic member 441 accumulates elastic potential energy. When the driver 45 stops outputting driving force or drives in the reverse direction, the first elastic member 441 can release the elastic potential energy to generate a reverse thrust on the lifting seat 43. The first elastic member 441 has multiple effects: on the one hand, during compression, the compression deformation of the elastic member can play a buffering role, avoiding rigid impact on the sealing ring 41 or the sample tube 2 caused by sudden increase of driving force of the lifting seat 43 and the compression sleeve 42; on the other hand, during the unlocking and resetting stage, the resetting elastic force of the first elastic member 441 can also drive the lifting seat 43 and the compression sleeve 42 to automatically move downward for resetting, ensuring smooth disassembly of the sample tube 2 and improving the safety and reliability of the device.

[0054] The specific manner in which the driver 45 drives the lifting seat 43 will be described in detail below in combination with the drawings and embodiments.

[0055] In one embodiment, the linear driver 45 preferably is a pneumatic cylinder. The pneumatic cylinder includes a cylinder body 46 and a piston rod 47. The cylinder body 46 is fixedly arranged on the side of the mounting body 1 through a support, and the axis 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 axis 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 having a high position and a low position that are sequentially transitioned along the extension direction of the piston rod 47, and the high position and the low position are connected by a smooth inclined surface. A rotating shaft is fixedly arranged on the lifting seat 43 at a position corresponding to the guide surface 471, and a roller 48 is rotatably sleeved on the rotating shaft, and the outer circumferential surface of the roller 48 is in contact with the guide surface 471. When the piston rod 47 reciprocates, the guide surface 471 can rollingly contact the roller 48, and the height change of the inclined surface can drive the lifting seat 43 to move along the axial direction of the sample tube 2. In one preferred embodiment, the rotating assembly of the lifting seat 43 and the guide surface 471 adopts a structure combined with a rotating shaft and a bearing, i.e., the rotating shaft is arranged on the lifting seat 43, and the extension end of the rotating shaft is fixedly sleeved with a bearing. This combined form helps to reduce the rotating resistance, so that the transmission between the piston rod 47 and the lifting seat 43 is smoother when the piston rod 47 drives the lifting seat 43 to ascend and descend, and thus the sealing and compression and the unlocking actions are more smooth.

[0056] The driving mode will be described in detail below for locking process and loosening process respectively.

[0057] Locking process: first, the sample tube 2 is inserted into the installation cavity 10 along the axial direction, and the sealing ring 41 is placed in the preset sealing position, and the compression sleeve 42 is preloaded on the lifting seat 43, at this time the roller 48 is in contact with the low position of the guide surface 471, and the whole mechanism is in the state of locking. When the sample tube 2 needs to be sealed and locked, the piston rod 47 of the driving device is extended outward under the action of driving force, and the guide surface 471 on the piston rod 47 is synchronously moved. In this process, the roller 48 slides along the guide surface 471 from the low position to the high position, and is continuously pushed up by the piston rod 47, and since the roller 48 is rigidly connected with the lifting seat 43 through the rotating shaft, the pushing force drives the lifting seat 43 to slide upward along the guide rod 44, and then drives the compression sleeve 42 to move towards the installation cavity 10, and finally forms axial compression on the sealing ring 41 through the compression sleeve 42, so as to realize reliable locking and sealing of the sample tube 2.

[0058] Loosening process: when the sample tube 2 needs to be taken out, the piston rod 47 of the driving device is reversely retracted, and the guide surface 471 reversely moves synchronously with the piston rod 47, so that the roller 48 gradually falls 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 return spring, the lifting seat 43 drives the compression sleeve 42 and the roller 48 to move downward along the guide rod 44 as a whole, the compression sleeve 42 gradually moves away from the installation cavity 10, and the compression force on the sealing ring 41 is relieved, so that the sample tube 2 can be smoothly taken out.

[0059] In this embodiment, the guide surface 471 with wedge-shaped inclined surface structure arranged on the piston rod 47 can stably convert the horizontal reciprocating motion of the piston rod 47 into the axial lifting motion of the lifting seat 43, without the need for complex reversing transmission mechanism, which simplifies the overall structure. At the same time, the smooth transition of the high position and the low position of the guide surface 471 makes the lifting speed and displacement of the lifting seat 43 easy to control, and can realize the gentle adjustment of the compression force of the sealing ring 41, avoid rigid impact, and ensure the stability of the sealing and locking process.

[0060] The specific structure of the compression sleeve 42 will be described in detail below in combination with the drawings and embodiments.

[0061] In one embodiment, as shown in FIG. 2, the compression sleeve 42 is a hollow sleeve with a hollow structure, and the hollow structure is provided with a plurality of sealing ring receiving grooves 421. Figure 5 and Figure 6As shown, the compression sleeve 42 comprises 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 extending end can abut against the bottom of the sealing ring 41. The inner diameter of the inner cylinder 421 is in clearance fit with the outer wall of the sample tube 2 to ensure smooth axial movement, and the peripheral wall of the inner cylinder 421 is in sliding fit with the inner wall of the mounting cavity 10 to improve the guiding stability. The outer cylinder 422 is slidingly arranged outside the inner cylinder 421, and the peripheral wall of the outer cylinder 422 is connected with the lifting seat 43 and can be lifted synchronously with the lifting seat 43. Further, a second elastic member 420 is connected between the inner cylinder 421 and the outer cylinder 422. The second elastic member 420 is preferably a cylindrical helical compression spring, and the second elastic member 420 is sleeved in the cylinder body of the outer cylinder 422. The top end of the second elastic member 420 abuts against the annular boss at the bottom of the inner cylinder 421, and the bottom end of the second elastic member 420 abuts against the inner bottom wall of the outer cylinder 422, forming an axially extendable elastic connection structure. When the driving assembly drives the outer cylinder 422 to move towards the sealing ring 41, the outer cylinder 422 moves upward and exerts a compression force on the second elastic member 420. After the second elastic member 420 is compressed under the force, the driving force is transmitted to the inner cylinder 421, which in turn drives the inner cylinder 421 to move synchronously towards the sealing ring 41.

[0062] The cooperation design of the split compression sleeve 42 and the second elastic member 420 provided in the present application has significant buffering and pressure self-adaptive adjustment effects. Specifically, in the initial compression stage, the outer cylinder 422 drives the inner cylinder 421 to stably approach the sealing ring 41 through the second elastic member 420, avoiding rigid contact. When the top end of the inner cylinder 421 abuts against the sealing ring 41 and starts to exert a compression force, as the outer cylinder 422 continues to move upward, the second elastic member 420 is further compressed, and its elastic deformation can absorb the excess driving force transmitted by the driving assembly, so that the compression force acting on the sealing ring 41 is always kept within a reasonable range, preventing sealing failure due to insufficient compression force and avoiding permanent deformation of the sealing ring 41 or damage to the sample tube 2 due to excessive compression force.

[0063] The specific connection mode of the outer cylinder 422 and the lifting seat 43 will be described in detail below in combination with the drawings and embodiments.

[0064] In one embodiment, as shown in Figs. 4 and 5, the outer cylinder 422 is connected with the lifting seat 43 through a first clamping part 4221 and a second clamping part 4222. Figure 5 and Figure 6 As shown in Figs. 4 and 5, the lifting seat 43 is provided with a mounting through hole 430 matching the outer diameter of the outer cylinder 422, and the outer cylinder 422 is arranged in the mounting through hole 430. The hole wall of the mounting through hole 430 is provided with a ring-shaped groove 431 in the circumferential direction, and the outer wall of the outer cylinder 422 is provided with the first clamping part 4221 at the position corresponding to the ring-shaped groove 431.

[0065] In the embodiment, the first clamping part 4221 adopts a combined structure of a connecting shaft and a bearing for the convenience of processing and assembly. Specifically, the connecting shaft is connected to the side wall of the outer cylinder 422 in the radial direction by threading, and the bearing is fixed to the protruding end of the connecting shaft, which together form a clamping protruding structure that fits the annular groove 431. This design does not require machining 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 connecting shaft is easy to disassemble and maintain, and the setting of the bearing helps to reduce the wear of the parts and also makes the axial linkage of the lifting seat 43 and the outer cylinder 422 more smooth. Through this clamping fit, when the lifting seat 43 moves in the axial direction, it can push the first clamping part 4221 to move synchronously through the groove wall of the annular groove 431, and then drive the outer cylinder 422 and the inner cylinder 421 to move axially together.

[0066] Further, in order to strengthen the connection reliability between the outer cylinder 422 and the lifting seat 43, the lifting seat 43 is also provided with a second clamping part 433, which is specifically an elastic clamping pin threaded on the side wall of the lifting seat 43. The elastic clamping pin has a spring structure built-in, and its end is kept in an extended state under the action of spring force. Correspondingly, the outer wall of the outer cylinder 422 is provided with a plurality of clamping grooves 4222 spaced in the circumferential direction, and the size of the clamping grooves 4222 is matched with the end of the elastic clamping pin. When the outer cylinder 422 is inserted into the mounting hole 430, the end of the elastic clamping pin is automatically clamped into the clamping groove 4222 of the outer cylinder 422 by the elastic force of the elastic clamping pin. The cooperation of the elastic clamping pin and the clamping groove 4222 not only forms mechanical positioning, but also realizes positioning damping effect through the friction between the spring force and the clamping surface. For example, when the lifting seat 43 drives the outer cylinder 422 to move axially or the outer cylinder 422 produces a slight displacement due to vibration, the damping force between the end of the elastic clamping pin and the wall of the clamping groove 4222 can slow down the displacement speed, avoiding the displacement or impact between the parts. During the process of the lifting seat 43 driving the outer cylinder 422 to move axially, this cooperation with positioning and damping can form a stable connection, which helps to prevent the outer cylinder 422 from being detached from the lifting seat 43 due to factors such as vibration and stress fluctuation, and improves the running stability of the overall structure.

[0067] Further, in order to realize the quick disassembly and assembly between the lifting seat 43 and the compression sleeve 42, with reference to Figure 7In the annular groove 431 of the lifting seat 43, a notch 432 is arranged, which penetrates the upper and lower end faces of the lifting seat 43 in the axial direction, and the width of the notch 432 is matched with the radial dimension of the first clamping part 4221 of the outer sleeve 42, and the notch 432 is in communication with the inside of the mounting hole 430 to form a passage for the first clamping part 4221 to enter and exit. In assembly, the first clamping part 4221 of the outer sleeve 422 can be aligned with the notch 432, and the pressing sleeve 42 is inserted into the mounting hole 430 in the axial direction of the sample tube 2, and after assembly, the first clamping part 4221 enters the annular groove 431, and the outer sleeve 422 is rotated to make the first clamping part 4221 misaligned with the notch 432, so that the clamping can be achieved. When disassembly or adjustment is required, the pressing sleeve 42 is rotated in the opposite direction to make the first clamping part 4221 aligned with the notch 432, so that the pressing sleeve 42 can be taken out of the mounting hole 430 in the axial direction. This structure can realize the quick assembly and disassembly of the pressing sleeve 42 and the lifting seat 43, and the quick assembly and disassembly characteristics between the two help the replacement operation of the sealing ring 41, that is, when the sealing ring 41 is worn or aged due to long-term use, the pressing sleeve 42 can be quickly removed through the above-mentioned notch 432 structure, and then the sealing ring 41 is replaced, simplifying the maintenance process. Of course, the quick assembly and disassembly characteristics of the pressing sleeve 42 and the lifting seat 43 also provide convenient conditions for the replacement of the sample tube 22. When the sample tube 2 needs to be replaced, the quick disassembly of the pressing sleeve 42 can simultaneously release its pressing state on the sealing ring 41, and then release the axial constraint on the mounting cavity, so that the sample tube 2 is free from the binding force of the sealing ring 41, facilitating smooth insertion and extraction.

[0068] In one embodiment, the reaction device is a chemical adsorption apparatus, which can be a chemical adsorption instrument. The chemical adsorption instrument can realize quick replacement of the sample tube 2 and effectively improve the test efficiency and operation convenience of the chemical adsorption apparatus, thanks to the quick sealing and locking structure of the sample tube 2 and the mounting cavity 10 and the integrated gas path design.

[0069] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will fall within the protection scope of the present application.

Claims

1. A reaction apparatus characterized by comprising: The utility model relates to a kind of sample tube locking mechanism, including: Mounting body (1), which is formed with mounting cavity (10) inside, the mounting body (1) is provided with air inlet channel (11) and air outlet channel (12), the air inlet channel (11) and the air outlet channel (12) are communicated with the mounting cavity (10); Sample tube (2), one end is open end, the open end of the sample tube (2) is inserted into the mounting cavity (10); Air pipe (3) is inserted into the sample tube (2), one end of the air pipe (3) is communicated with the air inlet channel (11), the other end extends to the bottom of the sample tube (2), annular gap is formed between the air pipe (3) and the sample tube (2), the annular gap is communicated with the air outlet channel (12), gas enters the bottom of the sample tube (2) from the air pipe (3) and is discharged to the air outlet channel (12) through the annular gap; Locking mechanism (4) is used for detachably fixing the sample tube (2) in the mounting cavity (10), and forms a seal between the sample tube (2) and the mounting cavity (10).

2. The reaction apparatus according to claim 1, wherein The locking mechanism (4) includes: Sealing assembly, including sealing ring (41) and pressing sleeve (42), the sealing ring (41) is arranged between the inner wall of the mounting cavity (10) and the outer wall of the sample tube (2), the pressing sleeve (42) is sleeved on the outside of the sample tube (2) and can extend into the mounting cavity (10) along the axial direction of the sample tube (2); Drive assembly is connected with the pressing sleeve (42), the mounting cavity (10) has working surface (101) inside, the drive assembly drives the pressing sleeve (42) to move to the direction close to the sealing ring (41) to press the sealing ring (41) to the working surface (101), so that the sealing ring (41) is elastically deformed to clamp the sample tube (2).

3. The reaction apparatus of claim 2, wherein The drive assembly includes: Lifting seat (43) is connected with the pressing sleeve (42); Guide rod (44) is connected between the mounting body (1) and the lifting seat (43), the lifting seat (43) is slidingly connected with the guide rod (44), and the guide rod (44) is parallel to the sample tube (2); Driver (45) is arranged on the mounting body (1), the output end of the driver (45) is connected with the lifting seat (43), for driving the lifting seat (43) to drive the pressing sleeve (42) to move along the axial direction of the guide rod (44).

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

5. The reaction apparatus of claim 3, wherein The driving assembly further comprises: A first elastic member (441) is sleeved on the guide rod (44), and two ends of the first elastic member (441) can respectively abut against the lifting seat (43) and the mounting body (1).

6. The reaction apparatus of claim 3, wherein The lifting seat (43) is provided with a mounting through hole (430), the compression sleeve (42) is arranged in the mounting through hole (430), a hole wall of the mounting through hole (430) is provided with an annular groove (431), and an outer wall of the compression sleeve (42) is provided with a first clamping portion (4221), the first clamping portion (4221) is clamped and matched with the annular groove (431).

7. The reaction apparatus of claim 6, wherein The annular groove (431) is provided with a notch (432), the notch (432) penetrates the lifting seat (43) along the axial direction of the sample tube (2), and the notch (432) is communicated with the mounting through hole (430), so that the compression sleeve (42) moves along the axial direction of the sample tube (2) through the first clamping portion (4221) and the notch (432).

8. The reaction apparatus of claim 6, wherein The lifting seat (43) is further provided with a second clamping portion (433), and an outer wall of the compression sleeve (42) is further provided with a clamping groove (4222), the second clamping portion (433) is matched with the clamping groove (4222).

9. The reactor of claim 2 wherein, The compression sleeve (42) comprises: An inner cylinder (421) which extends into the mounting cavity (10) at one end; An outer cylinder (422) which is arranged in sliding mode outside the inner cylinder (421), and the outer cylinder (422) is connected with the driving assembly; A second elastic member (420) which is connected between the inner cylinder (421) and the outer cylinder (422), when the driving assembly drives the outer cylinder (422) to move towards the sealing ring (41), the outer cylinder (422) can compress the second elastic member (420) to drive the inner cylinder (421) to move.

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

Images