Freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiment

Abstract

The invention discloses a freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiment, which comprises a machine body bearing frame, a cycle freeze-thaw structure is arranged in the machine body bearing frame, a transfer structure is arranged at the upper end of the cycle freeze-thaw structure, and a material storage structure is arranged at the bottom end of the transfer structure. And the bottom surface of the machine body bearing frame is fixedly connected with a bearing base. According to the freeze-thaw cycle machine suitable for the biochar freeze-thaw cycle experiment provided by the invention, a storage box in a material storage structure is arranged and is connected with a telescopic rod of a lifting mechanism through a connecting frame, a connecting seat and an insertion locking mechanism consisting of an insertion rod, an insertion block and a second spring; by means of the design, an operator only needs to pull the pull ring to unlock, the storage box and the material storage box in the storage box can be easily taken down together, the replacing and cleaning processes of different batches of samples are greatly simplified, and the overall operation efficiency and operation convenience are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of biochar modification equipment technology, and in particular to a freeze-thaw cycler suitable for biochar freeze-thaw cycle experiments. Background Technology

[0002] Freeze-thaw cycle testing is a core testing method that simulates the periodic temperature changes in nature in a laboratory to evaluate the durability of materials under repeated freezing and thawing conditions. Its basic principle is to precisely control the temperature so that the specimen undergoes multiple cycles of "water freezing expansion - ice melting contraction".

[0003] For example, Chinese Patent Publication No. (CN220063894U) discloses a freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiments, which describes: "A freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiments solves the problems of high labor intensity, low operating efficiency, and safety hazards in the modification of biochar in the prior art. The freeze-thaw cycle machine includes a machine body, with a translation mechanism on the upper part of the machine body that can reciprocate linearly in the horizontal direction, and a water bath heating box and a liquid nitrogen freezing box on the lower part of the machine body that can independently reciprocate linearly in the vertical direction; a material platform, which is suspended below the translation mechanism and moves synchronously with it, and contains biochar on the material platform; when the water bath heating box or liquid nitrogen freezing box is raised or lowered in the vertical direction, the biochar on the material platform is immersed in it. Overall, the freeze-thaw cycle machine of this utility model has a simple structure and is easy to operate, which can greatly reduce the labor intensity of workers, improve the efficiency of biochar processing, reduce safety risks, and has good practicality."

[0004] In summary, the existing technology still has the following technical problems: the material container used to hold biochar is usually fixedly connected to the lifting mechanism or is inconvenient to disassemble, and the operation is cumbersome when it is necessary to replace or clean the sample or conduct different batches of experiments, which affects the overall work efficiency.

[0005] Secondly, when material containers are immersed in or removed from the extreme temperature liquid nitrogen environment, the opening of the freezer lacks an effective automatic sealing or buffering mechanism, which may lead to rapid evaporation of the refrigerant, resulting in waste and increasing the safety risks of the laboratory environment. Therefore, it is necessary to propose a freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiments, and to provide a new technical solution to solve the technical problems mentioned in the above patent. Summary of the Invention

[0006] Therefore, it is necessary to provide a freeze-thaw cycler suitable for biochar freeze-thaw cycle experiments, addressing the problems mentioned in the background technology.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A freeze-thaw cycler suitable for freeze-thaw cycle experiments with biochar.

[0009] The freeze-thaw cycle machine body support frame suitable for biochar freeze-thaw cycle experiments is provided with a freeze-thaw cycle structure inside the machine body support frame, a transfer structure at the upper end of the freeze-thaw cycle structure, and a material storage structure at the bottom end of the transfer structure.

[0010] The bottom surface of the machine body support frame is fixedly connected to a support base, the bottom surface of the support base is fixedly connected to four casters, the top surface of the machine body support frame is fixedly connected to a top guide frame, and the transfer structure is set inside the top guide frame.

[0011] As a preferred embodiment of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention, the freeze-thaw cycle structure includes a water bath heating box fixedly installed inside the machine body support frame, and a liquid nitrogen freezing box fixedly connected inside the machine body support frame. The water bath heating box and the liquid nitrogen freezing box are arranged in a mirror symmetrical manner with the inside of the machine body support frame.

[0012] As a preferred embodiment of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention, a top sealing ring is fixedly connected inside the liquid nitrogen freezing chamber, four longitudinal guide rods are fixedly connected inside the liquid nitrogen freezing chamber, a cover is slidably disposed on the surface of the longitudinal guide rod, the cover is disposed at the bottom end of the top sealing ring, a top limiting block is fixedly connected to the top end of the longitudinal guide rod, and a first spring is sleeved on the surface of the longitudinal guide rod, the two ends of the first spring being fixedly connected to the cover and the top limiting block respectively.

[0013] As a preferred embodiment of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention, the transfer structure includes a horizontal guide rod fixedly disposed inside the top guide frame. One end of the top guide frame is fixedly connected to a reduction motor, and the transmission end of the reduction motor is rotatably connected to a threaded conveying rod. The threaded conveying rod is rotatably disposed inside the top guide frame, and the threaded conveying rod and the horizontal guide rod are symmetrically arranged front and back inside the top guide frame.

[0014] In a preferred embodiment of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention, the surface of the horizontal guide rod is slidably connected to the horizontal guide rod, the bearing plate is threadedly connected to the threaded conveying rod, the top surface of the bearing plate is fixedly connected to the electric push rod, the transmission end of the electric push rod is provided with a telescopic rod, and the telescopic rod is slidably disposed inside the bearing plate.

[0015] As a preferred embodiment of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention, the material storage structure includes a storage box, which is located at the bottom end of the telescopic rod. The storage box has water-permeable holes on its upper and lower sides. A stop bar is fixedly connected to one end of the storage box. A storage bin is slidably arranged inside the storage box, and a handle is fixedly connected to one end of the storage bin.

[0016] In a preferred embodiment of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention, the bottom end of the telescopic rod is fixedly connected to a connecting seat, the top surface of the storage box is symmetrically fixedly connected to a connecting frame, the connecting seat is slidably disposed inside the connecting frame, and one end of the connecting frame is in a closed state.

[0017] In a preferred embodiment of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention, a sleeve is fixedly connected to one side of the connecting frame, an insert rod is slidably arranged inside the sleeve, a plug block is fixedly connected to one end of the insert rod, a second spring is sleeved on the surface of the insert rod, the two ends of the second spring are fixedly connected to the plug block and the sleeve respectively, a pull ring is fixedly connected to the end of the insert rod away from the plug block, and one side of the plug block is an inclined surface.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The freeze-thaw cycler for biochar freeze-thaw cycle experiments provided by this invention features a storage box in the material storage structure. This storage box is connected to the telescopic rod of the lifting mechanism via a connecting frame, a connecting seat, and a locking mechanism consisting of a plug rod, a plug block, and a second spring. This design allows the operator to easily remove the storage box along with its internal storage box simply by pulling the pull ring to release the lock. This greatly simplifies the process of changing and cleaning different batches of samples, significantly improving overall work efficiency and ease of operation.

[0020] The freeze-thaw cycler provided by this invention, suitable for freeze-thaw cycle experiments of biochar, pushes open the cover when the storage box carrying the material descends into the freezer. When the storage box is lifted away, the cover automatically rises and fits tightly against the top sealing ring under the reset action of the first spring, thus effectively sealing the box opening during non-operational periods. This design greatly reduces the evaporation waste caused by exposure of refrigerants such as liquid nitrogen, and at the same time reduces the safety risks in the laboratory.

[0021] The freeze-thaw cycler provided by this invention, suitable for freeze-thaw cycle experiments with biochar, achieves precise and stable horizontal movement of the storage box between the heating and freezing chambers through a transverse guide rod, a threaded conveyor rod, and a geared motor. Combined with electric actuators and telescopic rods to control vertical lifting, the freeze-thaw cycle process is fully automated. This integrated design not only ensures the consistency of experimental conditions and prevents sample spillage, but also further reduces the labor intensity and intervention of manual operation, thereby improving the reliability and repeatability of experimental results. Attached Figure Description

[0022] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the overall structure of a freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiments provided by the present invention;

[0024] Figure 2 A rear-view schematic diagram of the overall structure of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention.

[0025] Figure 3 A schematic diagram of the structure of the freeze-thaw cycle machine support frame for a biochar freeze-thaw cycle experiment provided by the present invention;

[0026] Figure 4 A schematic diagram of the freezing-thaw cycle structure of a freezing-thaw cycle machine suitable for biochar freezing-thaw cycle experiments provided by the present invention;

[0027] Figure 5 A schematic diagram of the internal structure of the freeze-thaw cycler for a biochar freeze-thaw cycle experiment provided by the present invention.

[0028] Figure 6 A schematic diagram of the transfer structure of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention;

[0029] Figure 7 A schematic diagram of the transfer structure of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention;

[0030] Figure 8 A schematic diagram of the material storage structure of a freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiments provided by the present invention;

[0031] Figure 9This is a schematic diagram of the internal structure of the material storage structure of the freeze-thaw cycle machine for biochar freeze-thaw cycle experiments provided by the present invention.

[0032] The markings in the diagram are explained as follows:

[0033] 1. Machine body support frame; 2. Circulating freeze-thaw structure; 3. Transfer structure; 4. Material storage structure; 5. Support base; 6. Casters; 7. Top guide frame; 8. Water bath heating box; 9. Liquid nitrogen freezing box; 10. Top sealing ring; 11. Longitudinal guide rod; 12. Cover; 13. Top limiting block; 14. First spring; 15. Horizontal guide rod; 16. Gear motor; 17. Threaded conveyor rod; 18. Support plate; 19. Electric push rod; 20. Telescopic rod; 21. Storage box; 22. Water permeable hole; 23. Stop bar; 24. Material storage box; 25. Handle; 26. Connecting seat; 27. Connecting frame; 28. Sleeve; 29. ​​Insert rod; 30. Insertion block; 31. Second spring; 32. Pull ring. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] To address this technical problem, the present invention provides a freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiments.

[0036] For details, please refer to Figures 1-4 The freeze-thaw cycle machine suitable for biochar freeze-thaw cycle experiments specifically includes a machine body support frame 1, a circulating freeze-thaw structure 2 is set inside the machine body support frame 1, a transfer structure 3 is set at the upper end of the circulating freeze-thaw structure 2, and a material storage structure 4 is set at the bottom end of the transfer structure 3.

[0037] The bottom surface of the body support frame 1 is fixedly connected to the support base 5, and the bottom surface of the support base 5 is fixedly connected to four casters 6. The top of the body support frame 1 is fixedly connected to the top guide frame 7, and the transfer structure 3 is set inside the top guide frame 7.

[0038] The freeze-thaw cycler for biochar freeze-thaw cycle experiments provided by this invention features a storage box 21 in the material storage structure 4, which is connected to the telescopic rod 20 of the lifting mechanism via a connecting frame 27, a connecting seat 26, and a locking mechanism consisting of a plug rod 29, a plug block 30, and a second spring 31. This design allows the operator to easily remove the storage box 21 along with its internal storage box 24 simply by pulling the pull ring 32 to release the lock, greatly simplifying the replacement and cleaning process of different batches of samples and significantly improving overall work efficiency and ease of operation.

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0040] Please refer to Figures 2-9 A freeze-thaw cycle machine suitable for freeze-thaw cycle experiments of biochar includes a machine body support frame 1, a circulating freeze-thaw structure 2 is provided inside the machine body support frame 1, a transfer structure 3 is provided at the upper end of the circulating freeze-thaw structure 2, and a material storage structure 4 is provided at the bottom end of the transfer structure 3.

[0041] The bottom surface of the body support frame 1 is fixedly connected to the support base 5, and the bottom surface of the support base 5 is fixedly connected to four casters 6. The top of the body support frame 1 is fixedly connected to the top guide frame 7, and the transfer structure 3 is set inside the top guide frame 7.

[0042] Specifically, the cyclic freeze-thaw structure 2 includes a water bath heating box 8 fixedly installed inside the body support frame 1, and a liquid nitrogen freezing box 9 fixedly connected inside the body support frame 1. The water bath heating box 8 and the liquid nitrogen freezing box 9 are arranged in a mirror symmetrical manner with the inside of the body support frame 1.

[0043] Specifically, the liquid nitrogen freezing chamber 9 is internally fixedly connected to a top sealing ring 10, and four longitudinal guide rods 11 are internally fixedly connected to the liquid nitrogen freezing chamber 9. A cover 12 is slidably disposed on the surface of the longitudinal guide rods 11, and the cover 12 is disposed at the bottom end of the top sealing ring 10. A top limiting block 13 is fixedly connected to the top end of the longitudinal guide rods 11, and a first spring 14 is sleeved on the surface of the longitudinal guide rods 11. The two ends of the first spring 14 are fixedly connected to the cover 12 and the top limiting block 13, respectively.

[0044] Specifically, the transfer structure 3 includes a horizontal guide rod 15 fixedly installed inside the top guide frame 7. One end of the top guide frame 7 is fixedly connected to a reduction motor 16. The transmission end of the reduction motor 16 is rotatably connected to a threaded conveying rod 17. The threaded conveying rod 17 is rotatably installed inside the top guide frame 7. The threaded conveying rod 17 and the horizontal guide rod 15 are symmetrically arranged front and back inside the top guide frame 7.

[0045] Specifically, the horizontal guide rod 15 is slidably connected to the surface of the horizontal guide rod 15, the bearing plate 18 is threadedly connected to the threaded conveying rod 17, the top surface of the bearing plate 18 is fixedly connected to the electric push rod 19, the transmission end of the electric push rod 19 is provided with a telescopic rod 20, and the telescopic rod 20 is slidably disposed inside the bearing plate 18.

[0046] Specifically, the material storage structure 4 includes a storage box 21, which is located at the bottom of the telescopic rod 20. Water-permeable holes 22 are provided on the upper and lower sides of the storage box 21. A stop bar 23 is fixedly connected to one end of the storage box 21. A storage box 24 is slidably arranged inside the storage box 21. A handle 25 is fixedly connected to one end of the storage box 24.

[0047] Specifically, the bottom end of the telescopic rod 20 is fixedly connected to a connecting seat 26, and the top surface of the storage box 21 is symmetrically fixedly connected to a connecting frame 27. The connecting seat 26 is slidably disposed inside the connecting frame 27, and one end of the connecting frame 27 is in a closed state.

[0048] Specifically, a sleeve 28 is fixedly connected to one side of the connecting frame 27, and an insert rod 29 is slidably arranged inside the sleeve 28. One end of the insert rod 29 is fixedly connected to an insert block 30, and a second spring 31 is sleeved on the surface of the insert rod 29. The two ends of the second spring 31 are fixedly connected to the insert block 30 and the sleeve 28 respectively. A pull ring 32 is fixedly connected to the end of the insert rod 29 away from the insert block 30, and one side of the insert block 30 is a bevel.

[0049] With the above structural design, when using the device, pull the handle 25 to pull the storage box 24 out from the storage box 21, and place the modified biochar inside the storage box 24. After completion, turn on the reduction motor 16, which drives the threaded conveyor rod 17 to rotate. As the threaded conveyor rod 17 rotates, it moves the support plate 18 to the upper end of the liquid nitrogen freezing box 9. After completion, turn off the reduction motor 16, turn on the electric push rod 19 to drive the telescopic rod 20 to extend. As the telescopic rod 20 extends, it pushes the storage box 21 down. As the storage box 21 descends, it squeezes the cover 12. After being squeezed, the cover 12 slides downward inside the longitudinal guide rod 11. As the cover 12 slides, it moves into the liquid nitrogen. At the same time, the first spring 14 of the cover 12 is stretched until the storage box 21 is brought to the surface. The activated carbon inside the moving part is completely immersed in the liquid nitrogen freezer 9. After immersion for a period of time, the electric push rod 19 is controlled to drive the telescopic rod 20 to retract. At the same time as the telescopic rod 20 retracts, the storage box 21 is moved out of the liquid nitrogen freezer 9. At the same time as the storage box 21 is moved out, the first spring 14 drives the cover 12 to move upward. After completion, the reduction motor 16 is turned on to drive the threaded conveyor rod 17 to rotate. At the same time as the threaded conveyor rod 17 rotates, the storage box 21 is moved to the upper end of the water bath heating box 8 through the bearing plate 18. The electric push rod 19 is turned on to control the telescopic rod 20 to push the storage box 21 down into the water bath heating box 8 for water bathing. After a period of time, the electric push rod 19 controls the telescopic rod 20 to retract and drive the storage box 21 out of the water bath heating box 8. This process is repeated to perform the freeze-thaw cycle.

[0050] After prolonged low-temperature treatment, the storage box 21 will deform, causing the mesh box inside the storage box 24 to deform. By pulling the pull rings 32 on both sides, the plug block 30 is retracted into the sleeve 28. By sliding, the connecting seat 26 is separated from the connecting frame 27. After completion, by inserting the connecting seat 26 into the connecting frame 27, the connecting seat 26 slides inside the connecting frame 27 to squeeze the plug block 30, causing the plug block 30 to retract into the sleeve 28. At the same time, the second spring 31 is compressed. The second spring 31 pushes the plug block 30 to reset until the connecting seat 26 moves to the rear end of the second spring 31.

Claims

1. A freeze-thaw cycler suitable for biochar freeze-thaw cycle experiments, characterized in that; Includes a body support frame (1), the body support frame (1) is provided with a circulating freeze-thaw structure (2) inside, the upper end of the circulating freeze-thaw structure (2) is provided with a transfer structure (3), and the lower end of the transfer structure (3) is provided with a material storage structure (4). The bottom surface of the body support frame (1) is fixedly connected to a support base (5), and the bottom surface of the support base (5) is fixedly connected to four universal wheels (6). The top of the body support frame (1) is fixedly connected to a top guide frame (7), and the transfer structure (3) is located inside the top guide frame (7).

2. The freeze-thaw cycler for biochar freeze-thaw cycle experiments according to claim 1, characterized in that, The circulating freeze-thaw structure (2) includes a water bath heating box (8) fixedly installed inside the body support frame (1), and a liquid nitrogen freezing box (9) is fixedly connected inside the body support frame (1). The water bath heating box (8) and the liquid nitrogen freezing box (9) are arranged in a mirror symmetrical manner with the inside of the body support frame (1).

3. The freeze-thaw cycler for biochar freeze-thaw cycle experiments according to claim 2, characterized in that, The liquid nitrogen freezing chamber (9) is fixedly connected to a top sealing ring (10) and four longitudinal guide rods (11) are fixedly connected to the interior of the liquid nitrogen freezing chamber (9). A cover (12) is slidably disposed on the surface of the longitudinal guide rod (11). The cover (12) is disposed at the bottom end of the top sealing ring (10). A top limiting block (13) is fixedly connected to the top end of the longitudinal guide rod (11). A first spring (14) is sleeved on the surface of the longitudinal guide rod (11). The two ends of the first spring (14) are fixedly connected to the cover (12) and the top limiting block (13) respectively.

4. The freeze-thaw cycler for biochar freeze-thaw cycle experiments according to claim 3, characterized in that, The transfer structure (3) includes a horizontal guide rod (15) fixedly installed inside the top guide frame (7). One end of the top guide frame (7) is fixedly connected to a reduction motor (16). The transmission end of the reduction motor (16) is rotatably connected to a threaded conveying rod (17). The threaded conveying rod (17) is rotatably installed inside the top guide frame (7). The threaded conveying rod (17) and the horizontal guide rod (15) are symmetrically arranged inside the top guide frame (7).

5. The freeze-thaw cycler for biochar freeze-thaw cycle experiments according to claim 4, characterized in that, The surface of the horizontal guide rod (15) is slidably connected to the horizontal guide rod (15), the bearing plate (18) is threadedly connected to the threaded conveying rod (17), the top surface of the bearing plate (18) is fixedly connected to the electric push rod (19), the transmission end of the electric push rod (19) is provided with a telescopic rod (20), and the telescopic rod (20) is slidably disposed inside the bearing plate (18).

6. The freeze-thaw cycler for biochar freeze-thaw cycle experiments according to claim 5, characterized in that, The material storage structure (4) includes a storage box (21), which is located at the bottom of the telescopic rod (20). The storage box (21) has water-permeable holes (22) on its upper and lower sides. A stop bar (23) is fixedly connected to one end of the storage box (21). A storage box (24) is slidably arranged inside the storage box (21). A handle (25) is fixedly connected to one end of the storage box (24).

7. The freeze-thaw cycler for biochar freeze-thaw cycle experiments according to claim 6, characterized in that, The bottom end of the telescopic rod (20) is fixedly connected to a connecting seat (26), and the top surface of the storage box (21) is symmetrically fixedly connected to a connecting frame (27). The connecting seat (26) is slidably disposed inside the connecting frame (27), and one end of the connecting frame (27) is in a closed state.

8. The freeze-thaw cycler for biochar freeze-thaw cycle experiments according to claim 7, characterized in that, A sleeve (28) is fixedly connected to one side of the connecting frame (27). A plug rod (29) is slidably arranged inside the sleeve (28). A plug block (30) is fixedly connected to one end of the plug rod (29). A second spring (31) is sleeved on the surface of the plug rod (29). The two ends of the second spring (31) are fixedly connected to the plug block (30) and the sleeve (28) respectively. A pull ring (32) is fixedly connected to the end of the plug rod (29) away from the plug block (30). One side of the plug block (30) is an inclined surface.

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