A multi-physics experimental device for strong magnetic field

Abstract

The application discloses a kind of multi-physical field experimental devices for strong magnetic field, it is related to strong magnetic field technical field, including bearing assembly, pneumatic stirring assembly, reaction bottle fixing assembly and photo-thermal liquid bath component;Bearing assembly includes bearing frame and lifting mechanism, pneumatic stirring assembly includes air supply equipment, flexible air pipe, turbine, planetary reducer and stirring paddle, reaction bottle fixing assembly includes fixed frame structure and reaction bottle, photo-thermal liquid bath component includes outer bushing, heat equalizing cylinder, heating film, quartz window, light source and radiator.The application has the advantages that the reaction area can be accurately adjusted to the target magnetic field strength and magnetic field gradient position by precise positioning and lifting, and the illumination, heating and stirring can be cooperatively loaded and relatively independently controlled in the local reaction bottle, so as to meet the stable operation and rapid sampling requirements of multi-physical field reaction experiment under strong magnetic field extreme environment.

Description

Technical Field

[0001] This invention relates to the field of strong magnetic field technology, specifically to a multi-physics experimental device for strong magnetic fields. Background Technology

[0002] Strong magnetic fields can influence mass transfer, free radical behavior, particle orientation, nucleation growth, reaction rate, and selectivity in some chemical reactions, material synthesis, and crystal growth processes. To study the correspondence between magnetic field strength, magnetic field gradient, and reaction process and product state, it is necessary to arrange the reaction system within the working cavity of a superconducting magnet and to apply stable and repeatable loads to experimental conditions such as temperature, illumination, stirring, and reaction region location during the reaction process.

[0003] A 10T-class solenoid superconducting magnet typically has a cylindrical, small-aperture working space at its center, with a clearly defined effective magnetic field region and magnetic field gradient distributed along the axial direction. Different reaction flasks vary in height, liquid level, and effective reaction area. If the reaction flask cannot be positioned with large strokes and minute, controllable adjustments along the magnet's axial direction, it is difficult to accurately place the reaction liquid at the target magnetic field strength or gradient, thus affecting the comparability between different batches of experiments. Existing supports or lifting platforms used in conventional experimental spaces are mostly externally mounted and individually adjustable. In a confined working chamber with a strong magnetic field, they are easily limited by pipeline traction, device coaxiality, space constraints, and height locking stability. If the top connection is too rigid, it may also transfer the off-center load of external pipelines or supports to the reaction assembly, affecting the positioning accuracy and operational stability after lifting and adjustment. Therefore, existing structures cannot simultaneously meet the requirements of large-amplitude adjustment, precise positioning, and adaptation to different reaction flask sizes.

[0004] In conventional environments without strong magnetic fields, the illumination, heating, and stirring required for chemical reactions are typically achieved by independent light sources, oil baths or heating jackets, and magnetic or electric stirrers, respectively. However, in strong magnetic fields of up to 10T and their stray fields, ordinary electric motors and magnetic stirring structures struggle to operate stably. If the motor is placed far away and the torque is transmitted through a long drive shaft within the working chamber, eccentricity, oscillation, and end-effector vibrations are likely to occur, and significant axial and radial space is required. Simultaneously, the radial dimensions of the magnetic working chamber are limited, making it difficult to simultaneously and compactly accommodate the fixation of the reaction vessel, height adjustment, illumination, heating, stirring, and their piping. Heating structures may also obstruct the light path, and there are mutual constraints between light source heat dissipation, liquid bath sealing, selection of non-magnetic materials, and multi-functional independent control. Therefore, simultaneously applying illumination, temperature control, and stable mechanical stirring to the same solution reaction system within a confined space of a strong magnetic field presents significant challenges in device integration.

[0005] For chemical reactions in strong magnetic fields, the correspondence between the sample state at the end of the reaction and the applied experimental conditions is particularly important. If the apparatus requires waiting for the magnetic field to slowly decrease to zero before removal, the reaction system may undergo changes such as sedimentation, crystallization, phase transition, continued reaction, or attenuation of photothermal conditions during the field reduction, cooling, or continued residence process. This results in the final sample state not completely corresponding to the true state under the target strong magnetic field conditions. Traditional monolithic metal reaction vessels or large-volume heating vessels have large thermal inertia and high magnetic response risk, and are also not conducive to rapid sampling after the conditions have been applied. Summary of the Invention

[0006] The technical problem to be solved by this invention is how to provide a multi-physics reaction device suitable for axially precise lifting and positioning of reaction flasks within a confined cylindrical working cavity of a superconducting magnet, and capable of rapid sampling and simultaneous loading of experimental conditions such as illumination, local temperature control, and mechanical stirring.

[0007] Enables installation in compact environments and prevents eccentricity.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A multi-physics experimental device for strong magnetic fields includes a support component, a pneumatic stirring component, a reaction flask fixing component, and a photothermal liquid bath component; The supporting components include a supporting frame and a lifting mechanism. The lifting mechanism is installed on the supporting frame. The pneumatic stirring component and the photothermal liquid bath component are connected to the lifting end of the lifting mechanism through the reaction bottle fixing component. The pneumatic stirring assembly includes an air supply device, a flexible air duct, a turbine, a planetary reducer, and a stirring paddle. The air supply device is located outside the support assembly and is connected to the turbine inlet located inside the support frame through the flexible air duct. The output end of the turbine is connected to the input end of the planetary reducer connected to the reaction bottle fixing assembly. The output end of the planetary reducer is connected to the stirring paddle. The reaction flask fixing assembly includes a fixing frame structure and a reaction flask. The fixing frame structure is snapped onto the lifting end of the lifting mechanism. The reaction flask passes through the fixing frame structure and is snapped onto the fixing frame structure. The opening of the reaction flask is set towards the pneumatic stirring assembly, so that the stirring paddle extends into the reaction flask. The fixed end of the planetary reducer is connected to the fixing frame structure. The photothermal liquid bath assembly includes an outer bushing, a heat exchanger, a heating film, a quartz window, a light source, and a heat sink. The heat exchanger, which has an open top, is connected to the end of the fixed frame structure away from the planetary reducer via the outer bushing. The end of the reaction flask away from its opening extends into the liquid bath chamber of the heat exchanger. The heating film is wrapped around the heat exchanger. A quartz window is provided at the bottom of the heat exchanger. The light source is set on the quartz window and can irradiate light into the liquid bath chamber of the heat exchanger. A heat sink is provided at the bottom of the light source.

[0009] This experimental setup maintains the coaxial or near-coaxial arrangement of the reaction flask, stirring axis, illumination channel, and local heating area within the limited radial space of the superconducting magnet. It can reduce interference from external pipelines or supports on the positioning of the reaction components through a flexible top connection and integrated precise lifting and positioning. It can adapt to reaction flasks of different sizes and precisely adjust the reaction area to the target magnetic field strength or gradient position. It can reduce the influence of magnetic attraction, torque, eddy current damping, and overall thermal inertia through a polymer main frame and local heating. Furthermore, it can achieve coordinated loading and relatively independent control of illumination, heating, and stirring in the local area of ​​the reaction flask, thereby meeting the requirements for stable operation and rapid sampling in multi-physics field reaction experiments under extreme strong magnetic field environments.

[0010] Preferably, the supporting frame includes an upper ring, a lower ring, and a support rail. The upper ring and the lower ring are connected by multiple circumferentially arranged support rails. The driving end of the lifting mechanism is fixed on the upper ring, and the moving end is movably arranged on the support rail.

[0011] Preferably, the lifting mechanism includes a drive device, a lead screw, a slider, an upper platform, a lower platform, and support columns. The drive device is fixed on the top surface of the upper ring. The lead screw is arranged parallel to the direction of the support guide rail between the upper and lower rings and is connected to the output end of the drive device. A slider is provided on the lead screw. Both the upper and lower platforms are movably arranged on the support guide rail. The slider is connected to the bottom of the lower platform. The upper and lower platforms are connected by multiple circumferentially arranged support columns. The upper platform is provided with a locking and fixing frame structure with a slot that runs vertically through it.

[0012] Preferably, the fixing frame structure includes a clamp seat and a hinge clamp. The clamp seat is engaged in a slot. A hinge slot with vertical penetration is provided at the center of the clamp seat. The hinge clamp for engaging the reaction flask is engaged in the hinge slot. The bottom of the clamp seat is provided with an internal threaded hole communicating with the hinge slot. The heat exchanger is fixed to the bottom of the clamp seat by an outer bushing threadedly connected to the internal threaded hole, so that the reaction flask extends into the liquid bath chamber of the heat exchanger. The fixed end of the planetary reducer is connected to the clamp seat.

[0013] Preferably, the outer walls of both hinge clips are provided with extension blocks, and the distance between the extension blocks on the two hinge clips is greater than the width of the hinge slot.

[0014] Preferably, a retaining ring is also fixed on the top surface of the clamp seat, and the fixed end of the planetary reducer is detachably connected to the retaining ring.

[0015] Preferably, the reaction flask includes a body, a neck, and a rim. The body has a neck, and the end of the neck away from the body has an outwardly turned rim. A hinge clip is used to clamp the neck below the rim, and the rim is hung on the hinge clip.

[0016] Preferably, a sealing plug is also provided on the neck of the bottle, and the stirring paddle extends into the bottle body through the sealing plug.

[0017] Preferably, the planetary reducer consists of at least one stage of planetary reducer.

[0018] Preferably, the top of the supporting frame is also provided with a flow regulating valve, one end of which is connected to the flexible air duct and the other end is connected to the output end of the air supply equipment.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. This experimental setup maintains the reaction flask, stirring axis, illumination channel, and local heating area in a coaxial or near-coaxial arrangement within the limited radial space of the superconducting magnet; it can reduce the interference of external pipelines or supports on the positioning of the reaction components through a flexible top connection and integrated precise lifting and positioning; it can adapt to reaction flasks of different specifications and precisely adjust the reaction area to the target magnetic field strength or magnetic field gradient position; it can reduce the influence of magnetic attraction, torque, eddy current damping, and overall thermal inertia through a polymer main frame and local heating; and it can achieve coordinated loading and relatively independent control of illumination, heating, and stirring in the local area of ​​the reaction flask, thereby meeting the requirements for stable operation and rapid sampling of multi-physics field reaction experiments under strong magnetic field extreme environments.

[0020] 2. In this experimental setup, the air supply equipment can be positioned far from the superconducting magnet and its stray field. There is no need to install a conventional stirring motor near the superconducting magnet, ensuring the stable operation of the air supply equipment. The flexible duct is only used to transport airflow and not to transmit rotational motion. The turbine and planetary reducer can complete the airflow energy conversion, deceleration and torque increase, and stirring output near the fixed assembly of the reaction flask, allowing the stirring paddle to enter the reaction liquid with a shorter length, thereby reducing eccentricity, swaying and end vibration, and improving stirring stability and mixing uniformity.

[0021] 3. The multi-stage planetary reducer can increase or decrease the number of reduction stages through quick-release buckles, so as to adjust the output speed and output torque according to the viscosity of the reaction liquid and the target stirring speed. The light source can be replaced with LED beads of different wavelengths. The photothermal liquid bath module can improve the heating uniformity around the reaction vessel through the heat spreader and liquid bath medium. The quartz window can allow light to enter the liquid bath cavity. The stirring, heating, lighting and height adjustment modules can be used in combination or relatively independently according to experimental needs, which is conducive to the integrated loading and decoupled control of multiple reaction conditions in a confined space with a strong magnetic field. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the installation structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 3 This is a partial structural diagram of an embodiment of the present invention; Figure 4This is a partial structural diagram of an embodiment of the present invention; Figure 5 This is a partial cross-sectional view of an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the reaction flask fixing assembly according to an embodiment of the present invention; Figure 7 This is a partial structural diagram of the reaction flask fixing assembly according to an embodiment of the present invention; Figure 8 This is another partial structural diagram of the reaction flask fixing assembly according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the photothermal liquid bath assembly according to an embodiment of the present invention. Detailed Implementation

[0023] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0026] See Figure 1 and Figure 2 This embodiment discloses a multi-physics experimental device for strong magnetic fields, including a support component 1, a pneumatic stirring component 2, a reaction bottle fixing component 3, and a photothermal liquid bath component 4, with the experimental sample placed inside the reaction bottle fixing component 3.

[0027] The support assembly 1 includes a support frame 11 and a lifting mechanism 12. The support frame 11 is used to be placed at the central through hole of the superconducting magnet 5. The lifting mechanism 12 is provided on the support frame 11. The pneumatic stirring assembly 2 and the photothermal liquid bath assembly 4 are connected to the lifting end of the lifting mechanism 12 through the reaction bottle fixing assembly 3.

[0028] See Figure 3 The supporting frame 11 includes an upper ring 111, a lower ring 112 and a support rail 113. The upper ring 111 and the lower ring 112 are connected by a plurality of circumferentially arranged support rails 113. The upper ring 111 is provided with an outwardly folded flange for connecting with the superconducting magnet 5.

[0029] In this embodiment, the support rail 113 in the support frame 11 is an aluminum alloy rail with a base, and the upper ring 111, lower ring 112, and other main printed structures are made of PETG. Except for non-magnetic metal parts that perform heat conduction or specific transmission functions, the fasteners of this experimental device are made of aluminum alloy; the bearings are ceramic bearings or POM plastic bearings, and the device does not use ferromagnetic structural materials. PETG structural parts can also be replaced with other non-metallic or non-magnetic metal materials with sufficient strength.

[0030] The lifting mechanism 12 includes a drive device 121, a lead screw 122, a slider 123, an upper platform 124, a lower platform 125, and support columns 126. The drive device 121 is fixed to the top surface of the upper ring 111. The vertically arranged lead screw 122 is arranged between the upper ring 111 and the lower ring 112 parallel to the direction of the support rail and is connected to the output end of the drive device 121. The drive device 121 drives the lead screw 122 to rotate. The lead screw 122 is provided with a slider 123 threadedly connected to it. The upper platform 124 and the lower platform 125 are both movably arranged on the support rail 113. The slider 123 is fixed to the bottom of the lower platform 125. The upper platform 124 and the lower platform 125 are connected by multiple circumferentially arranged support columns 126. The upper platform 124 is provided with a slot 1241 that is through the upper and lower parts for installing the reaction bottle fixing assembly 3. The slot 1241 has a horizontal cross-section that is approximately circular and a vertical cross-section that is stepped, and is used to install the reaction bottle fixing assembly 3. Specifically, by activating the drive device 121 to rotate the lead screw 122, since both the upper platform 124 and the lower platform 125 are movably mounted on the support guide rail 113, the slider 123, which is fixed to the lower platform 125, will not rotate with the lead screw 122, but will move vertically on the lead screw 122. This will cause the upper platform 124 and the lower platform 125 to move along the axial direction of the central through hole of the superconducting magnet 5, thereby causing the reaction bottle fixing assembly 3 to move axially within the central through hole of the superconducting magnet 5, thus achieving precise axial lifting and lowering positioning of the reaction bottle fixing assembly 3.

[0031] See Figures 3 to 5The pneumatic stirring assembly 2 includes an air supply device (not shown), a flexible duct (not shown), a turbine 21, a planetary reducer 22, a stirring paddle 23, a flow regulating valve 24, and a fixing ring 25. In this embodiment, the air supply device is a blower with a maximum speed of 15000 r / min and a maximum flow rate of 2.8 m³ / min. The inner diameter of the flexible duct is 40 mm. Alternatively, other air supply devices capable of providing continuous and stable low-pressure airflow can be used. These devices are located outside and away from the superconducting magnet 5 to ensure stable operation. The flexible duct connects to the air inlet of the turbine 21 within the supporting frame 11, providing airflow to the turbine 21. The output end of the turbine 21 is connected to the input end of the planetary reducer 22 connected to the reaction flask fixing assembly 3. The output end of the planetary reducer 22 is connected to the stirring paddle 23, which extends into the reaction flask fixing assembly 3. (See reference...) Figure 3 The top of the upper ring 111 is also equipped with a flow adjustment valve 24. One end of the flow adjustment valve 24 is connected to the flexible air duct, and the other end is connected to the output end of the air supply equipment. The flow adjustment valve 24 is used to adjust the air volume entering the turbine 21 to meet the actual needs. Through the setting of the flexible air duct, the turbine 21, planetary reducer 22 and stirring paddle 23 can follow the upper platform 124 and the lower platform 125 to move axially in the central through hole of the superconducting magnet 5.

[0032] The fixed ring 25 is provided with a snap-fit ​​hole, and the planetary reducer 22 is provided with a snap-fit. The snap-fit ​​on the planetary reducer 22 engages with the snap-fit ​​hole on the fixed ring 25 to achieve a detachable connection between the planetary reducer 22 and the fixed ring 25 fixed on the reaction bottle fixing assembly 3.

[0033] Specifically, the continuous low-pressure airflow generated by the blower is directly delivered to the turbine 21 via a flexible duct. The turbine 21 drives the planetary reducer 22, which in turn drives the stirring paddle 23 to rotate, thereby stirring the experimental sample inside the reaction flask fixing assembly 3. The air supply equipment can be positioned far away from the superconducting magnet 5 and its stray field, eliminating the need for a conventional stirring motor near the superconducting magnet 5 and ensuring stable operation of the air supply equipment. The flexible duct is only used to transport airflow and does not transmit rotational motion. The turbine 21 and planetary reducer 22 can complete the airflow energy conversion, deceleration and torque increase, and stirring output near the reaction flask fixing assembly 3, allowing the stirring paddle 23 to enter the reaction liquid with a shorter length, thereby reducing eccentricity, oscillation, and end vibration, and improving stirring stability and mixing uniformity.

[0034] Furthermore, in this embodiment, the planetary reducer 22 can be configured with multiple stages of planetary reducers 22 connected in series according to actual conditions. Specifically, depending on the viscosity of the reaction liquid and the target stirring speed, one, two, or more stages of planetary reducers 22 can be installed. The planetary reducer 22 has four series snap-fit ​​slots along its circumference. Two series snap-fit ​​slots are used to fix the snap-fit ​​of this stage, and the other two series snap-fit ​​slots are used to cooperate with the snap-fit ​​of adjacent stages. The upper and lower halves of the snap-fit ​​are respectively set in the housings of adjacent two stages of reducers, thereby achieving quick assembly and disassembly while maintaining the coaxiality of each stage.

[0035] Each stage of the planetary reducer 22 includes a sun gear, multiple planet gears, an internal gear ring, an input shaft, an output shaft, a planet carrier, and a reducer housing. The internal gear ring is fixed relative to the reducer housing. The first-stage sun gear is driven by the input shaft. When a multi-stage structure is adopted, the first-stage planet carrier is driven by the next-stage sun gear, and the last-stage planet carrier is driven by the output shaft. The turbine 21 drives the input shaft and the first-stage sun gear to rotate. After at least one stage of planetary reduction, the output is output by the output shaft, which in turn drives the agitator 23 to rotate.

[0036] In this embodiment, the internal gear ring has 57 teeth, the sun gear has 21 teeth, and the planet gears have 18 teeth. When the internal gear ring is fixed, the sun gear is input, and the planet carrier is output, the theoretical transmission ratio of a single stage is 1+57 / 21, which is approximately 3.714. When two stages are connected in series, the theoretical total transmission ratio is approximately 13.80. The number of teeth and the number of stages can be changed according to the target speed and output torque.

[0037] See Figures 6 to 8 The reaction bottle fixing assembly 3 includes a fixing frame structure 31 and a reaction bottle 32. The fixing frame structure 31 is snapped into a slot 1241 on the upper platform 124. The reaction bottle 32 passes through the fixing frame structure 31 and is snapped into the fixing frame structure 31. The opening of the reaction bottle 32 is set towards the pneumatic agitator 23, so that the agitator 23 extends into the reaction bottle 32. The fixed end of the planetary reducer is connected to the fixing frame structure 31.

[0038] The fixing frame structure 31 includes a clamp base 311 and a hinge clamp 312. The horizontal cross-section of the clamp base 311 is approximately circular, matching the shape of the slot 1241, and the vertical cross-section is stepped, engaging with the slot 1241. Specifically, the circumferential side of the clamp base 311 is provided with multiple grooves, and the inner wall of the slot 1241 is provided with protrusions that engage with the grooves, causing the protrusions to engage in the grooves, thereby preventing the clamp base 311 from rotating within the slot 1241. At the same time, the stepped vertical cross-section of the slot 1241 provides vertical support for the clamp base 311, preventing the clamp base 311 from falling out of the slot 1241.

[0039] The clamp base 311 has a hinge groove 3111 that runs vertically through the center. The hinge clip 312 for engaging the reaction flask 32 is engaged in the hinge groove 3111. The bottom of the clamp base 311 has an internal threaded hole (not shown in the figure) that communicates with the hinge groove 3111. The photothermal liquid bath assembly 4 is threadedly connected to the bottom of the clamp base 311 and fixed, so that the reaction flask 32 extends into the photothermal liquid bath assembly. The fixed end of the planetary reducer 22 is connected to the clamp base 311 through the fixing ring 25.

[0040] The hinge clip 312 is formed by two hinges hinged together. The outer walls of both hinges are provided with extension blocks 3121. The distance between the extension blocks 3121 on the two hinges is greater than the width of the hinge slot 3111. This allows the hinge clip 312 to be engaged with the top surface of the clamp seat 311 through the extension blocks 3121 after it is inserted into the hinge slot 3111, thus preventing the hinge clip 312 from falling out of the hinge slot 3111.

[0041] The reaction flask 32 includes a body 321, a neck 322, and a rim 323. The neck 322 is provided on the body 321, and the end of the neck 322 away from the body 321 is provided with an outwardly turned rim 323. The hinge clip 312 is used to clamp the neck 322 below the rim 323, and the rim 323 is hung on the hinge clip 312 to ensure that the reaction flask 32 can be held by the hinge clip 312 and will not fall off.

[0042] See also Figure 5 The bottleneck 322 is also equipped with a sealing plug 6 for sealing the reaction flask 32, and the stirring paddle 23 extends through the sealing plug into the flask body 321.

[0043] See Figure 9The photothermal liquid bath assembly 4 includes an outer bushing 41, a heat spreader 42, a heating film 43, a quartz window 44, a light source 45, and a heat sink 46. The heat spreader 42, with an open top, is threadedly connected to the threaded hole at the bottom of the clamp seat 311 via the outer bushing 41. The bottle body 321 extends into the liquid bath cavity of the heat spreader 42. The heating film 43 wraps around the heat spreader 42 to heat it. A quartz window 44 is provided at the bottom of the heat spreader 42. The light source 45 is located on the quartz window 44 and can transmit light through the quartz window 44 to illuminate the liquid bath cavity of the heat spreader 42. A heat sink 46 is provided at the bottom of the light source 45 to dissipate heat from the light source 45 and the bottom of the heat spreader 42. A temperature sensor (not shown in the figure) is also provided on the outer bushing 41. By extending the bottle 321 into the liquid bath chamber of the heat exchanger 42 and placing a light source 45 at the bottom of the heat exchanger 42 to directly illuminate the reaction bottle 32, local heating and illumination of the reaction bottle 32 are achieved, reducing the cooling time after the experiment. At the same time, the use of non-ferromagnetic materials for the supporting frame 11 and main structural components eliminates the need for field reduction, allowing the experimental device to be quickly removed from the superconducting magnet 5. This meets the requirements for stable operation and rapid sampling of multi-physics reaction experiments under extreme strong magnetic field conditions. Furthermore, the cylindrical outer contour that matches the working cavity of the cylindrical magnet is formed, which is beneficial to improving the applicability under strong magnetic field conditions and the utilization rate of limited space.

[0044] In this embodiment, the outer bushing 41 is printed and formed from PA12 material and has a hollow structure to support the heat exchange cylinder 42 and reduce the heat conduction of the heat exchange cylinder 42 to the downward platform 125. The outer bushing 41 can also be made of other non-metallic materials with a temperature resistance of not less than 150 ℃.

[0045] The vapor chamber 42 is made of copper, the heating film 43 is a 20W polyimide electric heating film, and the temperature sensor is an MF52D 10K B3590 NTC that directly detects the temperature of the heat transfer liquid. The maximum operating temperature is 110 ℃, and the temperature control accuracy is ±0.8 ℃. The heat transfer liquid in the liquid bath can be water, thermal oil, or other liquids compatible with the reaction conditions. The vapor chamber 42 can also be made of other high thermal conductivity non-magnetic metals.

[0046] The light source 45 uses a single 30W LED bead, including a blue LED module with an emission wavelength of 450-455 nm and a green LED module with an emission wavelength of 520-525 nm. The two modules can be used interchangeably as needed.

[0047] The working principle of this embodiment is as follows: In use, the reaction flask 32 is first fixed by the fixing frame structure 31, and the planetary reducer 22 of the appropriate number of stages and the photothermal liquid bath assembly 4 are installed according to the experimental requirements. The axial position of the reaction flask 32 in the central through hole of the superconducting magnet 5 is adjusted by starting the drive device 121 to drive the lead screw 122, so that the reaction area is located at the target magnetic field position. After starting the air supply device, the airflow drives the turbine 21 through the flexible air duct, and then drives the stirring paddle 23 to rotate after being reduced and increased in torque by the planetary reducer 22, thereby stirring the experimental sample inside the reaction flask 32. When heating and light irradiation are required, heat transfer liquid is added to the liquid bath chamber of the heat exchanger 42 and the heating film 43 and the light source 45 are activated.

[0048] The experimental device has been running continuously for 48 hours in a 10 T magnetic field environment during the experiment, without any stoppage, structural loosening, obvious abnormal vibration or functional failure.

[0049] In other embodiments, the experimental apparatus can be selected from one or more of the heating module, illumination module, electric field module, or other physical field functional modules in the photothermal liquid bath assembly 4, depending on the experimental requirements. Each module only needs to be equipped with a connection structure adapted to the fixture base 311 to be installed on the upper platform 124, and can be used in combination with the pneumatic stirring assembly 2 or controlled separately.

[0050] In summary, the air supply equipment in the experimental apparatus disclosed in this embodiment can be arranged far away from the superconducting magnet 5 and its stray field. There is no need to set up a common stirring motor near the superconducting magnet 5, which ensures the stable operation of the air supply equipment. The flexible air duct is only used to transport airflow and does not transmit rotational motion. The turbine 21 and the planetary reducer 22 can complete the airflow energy conversion, deceleration and torque increase and stirring output near the reaction bottle fixing assembly 3, so that the stirring paddle 23 enters the reaction liquid with a shorter length, thereby reducing eccentricity, swaying and end vibration, and is conducive to improving stirring stability and mixing uniformity.

[0051] The multi-stage planetary reducer 22 can increase or decrease the number of reduction stages through quick-release buckles, so as to adjust the output speed and output torque according to the viscosity of the reaction liquid and the target stirring speed. The light source 45 can be replaced with LED beads of different wavelengths. The photothermal liquid bath module can improve the heating uniformity around the reaction vessel through the heat spreader 42 and the liquid bath medium. The quartz window can allow light to enter the liquid bath cavity. The stirring, heating, lighting and height adjustment modules can be used in combination or work relatively independently according to experimental needs, which is conducive to the integrated loading and decoupled control of multiple reaction conditions in a confined space with a strong magnetic field.

[0052] The load-bearing frame 11 and the main structural components are made of non-ferromagnetic materials and form a cylindrical outer contour that is compatible with the working cavity of the cylindrical magnet, which is beneficial to improving the applicability in strong magnetic field environments and the utilization rate of limited space.

[0053] Furthermore, the experimental device adopts a modular structure and an additive manufacturing main structure, which facilitates assembly, maintenance, and size customization, and helps reduce manufacturing costs. It maintains the coaxial or near-coaxial arrangement of the reaction flask, stirring axis, illumination channel, and local heating area within a limited radial space. It can reduce the interference of external pipelines or supports on the positioning of reaction components through a flexible top connection and integrated lifting and positioning structure, adapt to different sizes of reaction flasks, and accurately adjust the reaction area to the target magnetic field strength or magnetic field gradient position. It can reduce the influence of magnetic attraction, torque, eddy current damping, and overall thermal inertia through a polymer main frame and local heating. It can also achieve coordinated loading and relatively independent control of illumination, heating, and stirring in the local area of ​​the reaction flask, thereby meeting the requirements for stable operation and rapid sampling of multi-physics field reaction experiments under strong magnetic field extreme environments.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] The above embodiments are merely examples of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A multi-physics experimental device for strong magnetic fields, characterized by: Includes a support assembly, a pneumatic stirring assembly, a reaction flask fixing assembly, and a photothermal liquid bath assembly; The supporting components include a supporting frame and a lifting mechanism. The lifting mechanism is installed on the supporting frame. The pneumatic stirring component and the photothermal liquid bath component are connected to the lifting end of the lifting mechanism through the reaction bottle fixing component. The pneumatic stirring assembly includes an air supply device, a flexible air duct, a turbine, a planetary reducer, and a stirring paddle. The air supply device is located outside the support assembly and is connected to the turbine inlet located inside the support frame through the flexible air duct. The output end of the turbine is connected to the input end of the planetary reducer connected to the reaction bottle fixing assembly. The output end of the planetary reducer is connected to the stirring paddle. The reaction flask fixing assembly includes a fixing frame structure and a reaction flask. The fixing frame structure is snapped onto the lifting end of the lifting mechanism. The reaction flask passes through the fixing frame structure and is snapped onto the fixing frame structure. The opening of the reaction flask is set towards the pneumatic stirring assembly, so that the stirring paddle extends into the reaction flask. The fixed end of the planetary reducer is connected to the fixing frame structure. The photothermal liquid bath assembly includes an outer bushing, a heat exchanger, a heating film, a quartz window, a light source, and a heat sink. The heat exchanger, which has an open top, is connected to the end of the fixed frame structure away from the planetary reducer via the outer bushing. The end of the reaction flask away from its opening extends into the liquid bath chamber of the heat exchanger. The heating film is wrapped around the heat exchanger. A quartz window is provided at the bottom of the heat exchanger. The light source is set on the quartz window and can irradiate light into the liquid bath chamber of the heat exchanger. A heat sink is provided at the bottom of the light source.

2. The multiphysics experimental apparatus for strong magnetic fields according to claim 1, characterized in that: The supporting frame includes an upper ring, a lower ring, and support rails. The upper ring and the lower ring are connected by multiple circumferentially arranged support rails. The driving end of the lifting mechanism is fixed on the upper ring, and the moving end is movably arranged on the support rails.

3. The multiphysics experimental apparatus for strong magnetic fields according to claim 2, characterized in that: The lifting mechanism includes a drive device, a lead screw, a slider, an upper platform, a lower platform, and support columns. The drive device is fixed on the top surface of the upper ring. The lead screw is set between the upper and lower rings parallel to the direction of the support guide rail and is connected to the output end of the drive device. A slider is set on the lead screw. The upper and lower platforms are both movably set on the support guide rail. The slider is connected to the bottom of the lower platform. The upper and lower platforms are connected by multiple circumferentially set support columns. The upper platform is provided with a locking and fixing frame structure with a slot that runs vertically through it.

4. The multiphysics experimental apparatus for strong magnetic fields according to claim 3, characterized in that: The fixed frame structure includes a clamp base and a hinge clamp. The clamp base is engaged in a slot. A through-hole hinge slot is provided at the center of the clamp base for engaging the reaction flask. The bottom of the clamp base is provided with an internal threaded hole that communicates with the hinge slot. The heat exchanger is fixed to the bottom of the clamp base by an outer bushing threadedly connected to the internal threaded hole, allowing the reaction flask to extend into the liquid bath chamber of the heat exchanger. The fixed end of the planetary reducer is connected to the clamp base.

5. A multiphysics experimental apparatus for strong magnetic fields according to claim 4, characterized in that: The outer walls of both hinges of the hinge clip are provided with extension blocks, and the distance between the extension blocks on the two hinges is greater than the width of the hinge slot.

6. The multiphysics experimental apparatus for strong magnetic fields according to claim 4, characterized in that: A retaining ring is also fixed on the top surface of the clamp seat, and the fixed end of the planetary reducer is detachably connected to the retaining ring.

7. A multiphysics experimental apparatus for strong magnetic fields according to claim 4, characterized in that: The reaction flask includes a body, a neck, and a rim. The body has a neck, and the end of the neck away from the body has an outward-curving rim. A hinge clip is used to clamp the neck below the rim, and the rim is hung on the hinge clip.

8. A multiphysics experimental apparatus for strong magnetic fields according to claim 7, characterized in that: A sealing plug is also provided on the neck of the bottle, and the stirring paddle extends into the bottle body through the sealing plug.

9. A multiphysics experimental apparatus for strong magnetic fields according to claim 1, characterized in that: A planetary reducer consists of at least one stage of planetary reducer.

10. A multiphysics experimental apparatus for strong magnetic fields according to claim 1, characterized in that: The top of the support frame is also equipped with a flow regulating valve, one end of which is connected to the flexible air duct, and the other end is connected to the output end of the air supply equipment.

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