Bedrock weathered layer sample preservation device based on earth key zone research

Abstract

The invention relates to the technical field of refrigeration and storage of microorganism samples, in particular to a bedrock weathered layer sample storage device based on earth key zone research, which comprises a refrigeration box, the sample storage structure is mounted on the inner side of the refrigerating box; an adjusting driving structure which is in driving fit with the sample storage structure is mounted at the top of the refrigerating box; an isolating structure for isolating and storing the bedrock weathered layer sample storage pipe is arranged in the sample storage structure; according to the refrigeration device, the interior of the refrigeration box can be refrigerated to-30 DEG C through a circulation system composed of the condenser, the compressor, the throttling valve and the evaporator, the low-temperature storage requirement is met, the dry ice bath box is matched with the dry ice box in the dry ice box frame, double cooling is achieved through heat absorption refrigeration, the refrigeration efficiency is improved, and the sample freezing time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial sample refrigeration storage, and in particular to a bedrock weathering layer sample preservation device based on the study of the Earth's critical zone. Background Art

[0002] Bedrock regolith is an important part of the Earth's critical zone. The preservation of its samples is of great significance to the research in the fields of geology and ecology. In the process of studying the Earth's critical zone, bedrock regolith samples include soil and rock fragments. It is very important to effectively preserve the samples to maintain their original characteristics and state. The accuracy and reliability of subsequent research data can be ensured by effectively preserving the samples. In the sampling process of bedrock regolith in the study of the Earth's critical zone, the collected samples need to be quickly preserved using freezing technology. The freezing technology quickly kills the microorganisms in the samples and freezes them in the state when they were collected, which is convenient for subsequent research. Currently, the equipment used to freeze samples is large and inconvenient to carry. During normal operation, the collected samples need to be quickly transported to a distant collection vehicle, and then frozen using a freezer in the collection vehicle.

[0003] However, most of the samples are collected in the mountains. The terrain is complex and the car cannot drive to the designated location. After the samples are collected, they need to be transported back to the car quickly. Otherwise, the samples may not be frozen for a long time, causing the internal bacteria and microorganisms to undergo qualitative changes. The complex mountain terrain makes it impossible to transport the samples to the car quickly. In addition, the traditional freezing equipment has a simple structure and cannot store samples in isolation. Failure to isolate and store the samples may cause the bedrock weathering layer sample storage tube to contaminate the internal environment of the storage device, affecting the quality of other samples and research results.

[0004] Therefore, those skilled in the art provide a bedrock weathering layer sample preservation device based on the study of the Earth's critical zone to solve the problems raised in the above background technology. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides: A device for preserving bedrock weathering layer samples based on Earth critical zone research comprises: a cold storage box with a refrigeration device installed inside the cold storage box; Also included is a sample preservation structure mounted on the inside of the cold storage box; The top of the refrigerator is equipped with an adjustment drive structure that cooperates with the sample preservation structure; The sample preservation structure has a built-in isolation structure for isolating and storing bedrock weathering layer sample storage tubes; The sample preservation structure includes a refrigerated box fixedly arranged inside the refrigerated inner box, and the outer edges of the upper and lower ends of the refrigerated inner box are equipped with ventilation rings; An insulation chassis is rotatably mounted on the inner side of the bottom of the refrigerated inner box, and an extension groove is provided through the bottom of the insulation chassis. A dry ice bath box is provided below the extension groove, and an assembly groove is provided on the side of the refrigerated box at a position corresponding to the dry ice bath box.

[0006] Preferably, a driving ring is rotatably mounted at the center of the heat-insulating chassis, and a plurality of dry ice box racks for storing dry ice boxes are fixedly arranged at equal intervals in a ring-shaped outer wall of the driving ring.

[0007] Preferably, a sample placement box is fixedly provided at one end of the dry ice box rack away from the driving ring, and a vertical limiting groove is provided inside the sample placement box; A limiting box is slidably provided on the inner side of the vertical limiting groove, and an inner edge box located inside the sample placement box is fixedly assembled on the inner edge of the bottom of the limiting box; A tension spring is provided between the inner edge box and the sample placement box, and a reset groove is provided at a position of the inner edge box corresponding to the tension spring, and the tension spring is installed inside the reset groove.

[0008] Preferably, the isolation structure includes an isolation membrane arranged inside the inner edge box, and a cold water membrane is arranged inside the isolation membrane; The inner and outer edges of the isolation membrane are both annular and are provided with a plurality of arc air bags at equal distances.

[0009] Preferably, the adjustment drive structure includes a sealing ring cover located above the refrigerated inner box, a sealing cover plate is integrally fixed to the outer side of the sealing ring cover, and a closing ring is integrally fixed to the bottom of the sealing ring cover; A sealing ring groove is provided at a position of the refrigerator corresponding to the closed ring, and the sealing ring cover is sealed and docked to the inner side of the sealing ring groove of the refrigerator through the closed ring.

[0010] Preferably, a ventilation groove is provided inside the sealing ring cover, and a transmission ring is rotatably mounted at the center of the ventilation groove, an outer gear ring is fixedly mounted on the outer wall of the transmission ring, and the outer gear ring is meshed with a spur gear; The top of the spur gear is connected to a servo motor 1; The bottom of the transmission ring is annular and fixed with a plurality of docking rods at equal distances.

[0011] Preferably: a latching hole is provided on the top of the driving ring at a position corresponding to the docking rod; The transmission ring is inserted into the engaging hole of the driving ring through the engaging rod to complete the engaging and engaging engagement.

[0012] Preferably: a servo motor 2 is fixedly mounted at the center of the sealing ring cover, and a bottom slot rod is fixedly assembled at the output end of the servo motor 2, and a hexagonal slot is provided on the inner wall of the bottom end of the bottom slot rod; A hexagonal block is fixedly installed at the center of the surface of the heat-insulating chassis. When the sealing ring cover is installed on the refrigerator, the hexagonal slot at the bottom of the bottom slot rod is clamped on the hexagonal block.

[0013] Preferably, a placement groove is vertically provided on the sealing ring cover corresponding to the position of the single inner edge box, and a closing cover is spirally sealed on the inner side of the placement groove.

[0014] Preferably, a bottom push frame is vertically slidably provided on the top of the placement groove, and a return spring is assembled between the bottom push frame and the sealing ring cover.

[0015] Technical effects and advantages of the present invention: The present invention can be used by directly carrying the entire device to the designated sampling location. After collecting the sample, the sample can be directly refrigerated to avoid the qualitative change of bacteria in the sample. The refrigeration device can cool the interior of the refrigerator to -30°C through a circulation system composed of a condenser, a compressor, a throttle valve and an evaporator, meeting the low-temperature storage requirements. The dry ice bath box is combined with the dry ice box in the dry ice box rack to achieve double cooling through heat absorption refrigeration, thereby improving the refrigeration efficiency and shortening the sample freezing time.

[0016] The present invention adopts an isolation structure made of a disposable plastic film to isolate the sample storage tube from the internal environment of the storage device, thereby preventing the sample from contaminating the device and ensuring the purity of multiple groups of samples stored. The arc airbag in the isolation film can isolate the sample storage tube from the cold water film of the refrigeration liquid, preventing the sample tube from being squeezed by the expansion force when the refrigeration liquid freezes, causing deformation or rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a bedrock weathering layer sample preservation device based on Earth critical zone research provided by this application; Figure 2 This is a schematic diagram of the side structure of a bedrock weathering layer sample preservation device based on the Earth's critical zone research provided by this application; Figure 3 This is a schematic structural diagram of a refrigeration device in a bedrock weathering layer sample preservation device based on Earth critical zone research provided by this application; Figure 4 This is a schematic structural diagram of a sample preservation structure in a bedrock weathering layer sample preservation device based on Earth critical zone research provided by this application; Figure 5 This is a schematic structural diagram of a sealing ring groove in a bedrock weathering layer sample preservation device based on Earth critical zone research provided by this application; Figure 6 This is a schematic structural diagram of a drive ring in a bedrock weathering layer sample preservation device based on Earth critical zone research provided by this application; Figure 7 This is a schematic structural diagram of a sample placement box in a bedrock weathering layer sample preservation device based on Earth critical zone research provided by this application; Figure 8 This is a schematic diagram of the structure of an adjustment drive structure in a bedrock weathering layer sample preservation device based on the study of the Earth's critical zone, provided in this application; Figure 9 This is a schematic structural diagram of a cold air guide in a bedrock weathering layer sample preservation device based on Earth critical zone research provided by this application; Figure 10 This application provides a bedrock weathering layer sample storage device based on the study of the Earth's critical zone. Figure 8 Schematic diagram of the structure at A in the middle; Figure 11 This application provides a bedrock weathering layer sample storage device based on the study of the Earth's critical zone. Figure 8 Schematic diagram of the structure at B in the middle; Figure 12 This is a schematic diagram of the circuit structure of a refrigeration device in a bedrock weathering layer sample preservation device based on the study of the Earth's critical zone, provided in this application.

[0018] In the picture: 1. Refrigerated box; 2. Sample storage structure; 201. Refrigerated inner box; 202. Ventilation ring; 203. Insulated chassis; 204. Extension slot; 205. Drive ring; 206. Snap-in hole; 207. Vertical air slot; 208. Dry ice box holder; 209. Box cover; 210. Sample storage box; 211. Ventilation screen; 212. Vertical limit slot; 213. Inner edge box; 214. Limit box; 215. Reset slot; 216. Tension spring; 217. Hexagonal block; 21. Isolation structure; 2101. Isolation membrane; 2102. Cold water membrane; 2103. Arc airbag; 3. Adjusting drive structure; 3101. Sealing ring cover; 3102. Sealing cover plate; 3103. Closing ring; 3104. Ventilation slot; 3105. Transmission ring; 3106. External gear ring; 3107. Spur gear; 3108. Servo motor 1; 3109. Docking rod; 3110. Servo motor 2; 3111. Placement slot; 3112. Bottom slot rod; 3113. Bottom push frame; 3114. Return spring; 3115. Closing cover; 4. Refrigeration device; 5. Dry ice bath; 6. Handle; 7. Controller; 8. Battery; 9. Moving wheel; 11. Sealing ring groove; 12. Assembly groove. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The examples of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0020] For example 1, please refer to Figures 1 to 5 、 Figure 12 In this embodiment, a device for preserving bedrock weathering layer samples based on research on the Earth's critical zone is provided, comprising: a refrigerator 1, wherein a refrigeration device 4 is installed inside the refrigerator 1; and a sample preservation structure 2 installed inside the refrigerator 1; the sample preservation structure 2 is used to freeze and store multiple storage tubes storing bedrock weathering layer samples; The top of the refrigerator 1 is equipped with an adjustment drive structure 3 that cooperates with the sample preservation structure 2; the sample preservation structure 2 has a built-in isolation structure 21 for isolating and storing bedrock weathering layer sample storage tubes; The isolation structure 21 is made of a disposable plastic film, which can isolate the rock weathering layer sample storage tube from the internal environment when stored in the sample storage structure 2, thereby preventing the rock weathering layer sample storage tube from contaminating the sample storage structure 2; the inner wall of the dry ice bath box 5 is annularly provided with a plurality of vertical air slots 207 at equal intervals for circulating cold air in an annular manner; The outer walls of both sides of the refrigerator 1 are rotatably mounted with handles 6; a controller 7 and two battery packs 8 are mounted on the refrigerator 1; and moving wheels 9 are mounted at the four corners of the bottom of the refrigerator 1. The refrigeration device 4 includes a condenser arranged inside the refrigerator 1 and a cooling fan for ventilation thereof. The high-pressure liquid refrigerant pipe of the condenser is connected to a throttling device, which is specifically a throttling valve. The throttling device mixes the high-pressure liquid with the low-pressure gas-liquid and transmits it to the evaporator. Through the evaporator's heat absorption refrigeration principle, the internal environment of the refrigerator 1 is cooled to -30°C. The low-pressure liquid refrigerant pipe of the condenser is connected to a compressor. After the compressor heats the gaseous refrigerant, heat exchange is completed with the evaporator to complete the refrigeration cycle. The compressor of the refrigeration device 4 is a ZP15K4E-PFV-800 DC variable frequency compressor, the condenser is a Gaoli MC-1230 microchannel aluminum type, the evaporator is matched with a Sanhua PF-0808 plate heat exchanger, the throttling device adopts a SEN-2530 electronic expansion valve, and the refrigerant circulation system is filled with 380g of R404a refrigerant. At an ambient temperature of 25°C, 12 groups of samples inside the refrigerator 1 can be evenly cooled from 25°C to -30°C within 8 minutes. The dry ice bath box 5 is filled with 500g of solid dry ice particles with a sublimation point of -78.5°C, and the auxiliary refrigeration can last for 4 hours. The condenser is specifically a microchannel aluminum condenser model MC-1230 with a size of 120×300mm. The condenser adopts a microchannel aluminum structure model MC-1230 and is matched with a 40W axial flow fan; the evaporator is a plate-type copper-aluminum composite model PF-0808 with an effective heat exchange area of 0.25m².

[0021] For example 2, please refer to Figures 4 to 10 In this embodiment, a sample preservation structure 2 in a bedrock weathering layer sample preservation device based on the study of the Earth's critical zone is provided; The sample storage structure 2 includes a refrigerator 1 fixedly mounted inside a refrigerator inner box 201, and ventilation rings 202 are installed on the upper and lower outer edges of the refrigerator inner box 201. The refrigerator 1 is fixedly mounted inside the refrigerator 1 via the ventilation rings 202, and the ventilation rings 202 are used to circulate cold air from the refrigeration device 4. An insulating chassis 203 is rotatably mounted on the inner bottom of the refrigerated inner box 201, and an extension slot 204 is formed through the bottom of the insulating chassis 203. A dry ice bath box 5 is disposed below the extension slot 204. An assembly slot 12 is formed on the side of the refrigerated box 1 at a position corresponding to the dry ice bath box 5. The dry ice bath box 5 is detachably and sealedly disposed inside the assembly slot 12, and the top of the dry ice bath box 5 is sealed and insulated by the insulating chassis 203. A drive ring 205 is rotatably mounted at the center of the insulating chassis 203, and a plurality of dry ice box racks 208 for storing dry ice boxes are fixedly arranged at equal intervals in a circular shape on the outer wall of the drive ring 205. The dry ice box racks 208 are arranged inside the refrigerator 1. The dry ice box racks 208 utilize the heat absorption and refrigeration principle of the built-in dry ice boxes to perform dual refrigeration processing on the stored bedrock weathering layer sample storage tubes in conjunction with the refrigeration device 4. Hollow ventilation screens 211 are fixed on all four sides of the dry ice box frame 208; a box cover 209 is detachably mounted on the top of the dry ice box frame 208; A sample placement box 210 is fixedly provided at one end of the dry ice box rack 208 away from the drive ring 205, and a vertical limiting groove 212 is provided inside the sample placement box 210; a limiting box 214 is slidably provided inside the vertical limiting groove 212, and an inner edge box 213 located inside the sample placement box 210 is fixedly assembled on the inner edge of the bottom of the limiting box 214; A tension spring 216 is provided between the inner edge box 213 and the sample placement box 210, and a reset groove 215 is provided on the inner edge box 213 at a position corresponding to the tension spring 216. The tension spring 216 is installed inside the reset groove 215; the inner edge box 213 can be elastically reset inside the sample placement box 210 through the tension spring 216. The cross-sectional dimensions of the sample placement box 210 are Φ80mm×150mm, the gap between the inner edge box 213 and the sample placement box wall is 2.5mm, and the thickness of the arc airbag 2103 in the compressed state is 2mm.

[0022] For example three, please refer to Figure 10 In this embodiment, an isolation structure 21 in a bedrock weathering layer sample storage device based on the study of the Earth's critical zone is provided; The isolation structure 21 includes an isolation membrane 2101 disposed inside the inner edge box 213, and a cold water membrane 2102 is disposed inside the isolation membrane 2101; the cold water membrane 2102 is provided with a refrigerant liquid at a liquid level in the middle of the cold water membrane 2102; The inner and outer edges of the isolation membrane 2101 are both annularly provided with a number of arc airbags 2103 at equal distances; the arc airbags 2103 are used to isolate the bedrock weathering layer sample storage tube from the refrigeration liquid during storage, thereby preventing the bedrock weathering layer sample storage tube from contacting the refrigeration liquid and reducing the deformation or rupture caused by the expansion force when the refrigeration liquid is frozen from a liquid state to a solid state.

[0023] For example 4, please refer to Figure 8 、 Figure 11 In this embodiment, an adjustment drive structure 3 in a bedrock weathering layer sample preservation device based on the study of the Earth's critical zone is provided; The adjustment drive structure 3 includes a sealing ring cover 3101 located above the refrigerated inner box 201, a sealing cover plate 3102 is integrally fixed to the outer side of the sealing ring cover 3101, and a sealing ring 3103 is integrally fixed to the bottom of the sealing ring cover 3101; The refrigerator 1 is provided with a sealing ring groove 11 at a position corresponding to the closing ring 3103 , and the sealing ring cover 3101 is sealed and docked to the inner side of the sealing ring groove 11 of the refrigerator 1 through the closing ring 3103 .

[0024] Locking bolts are spirally locked at the four corners between the sealing cover plate 3102 and the refrigerator 1, and the sealing cover plate 3102 and the refrigerator 1 are detachably arranged through the locking bolts.

[0025] A ventilation groove 3104 is provided inside the sealing ring cover 3101, and a transmission ring 3105 is rotatably mounted at the center of the ventilation groove 3104. An outer gear ring 3106 is fixedly mounted on the outer wall of the transmission ring 3105, and the outer gear ring 3106 is meshed with a spur gear 3107. The top of the spur gear 3107 is connected to a servo motor 1 3108 ; the servo motor 1 3108 is fixedly mounted on the inner wall of the sealing ring cover 3101 , and the servo motor 1 3108 is used to actively drive the spur gear 3107 to rotate; The bottom of the transmission ring 3105 is annularly provided with a plurality of docking rods 3109 fixed at equal intervals. The top of the drive ring 205 is provided with engaging holes 206 corresponding to the positions of the docking rods 3109. The transmission ring 3105 is inserted into the engaging holes 206 of the drive ring 205 through the docking rods 3109 to complete the docking. When the transmission ring 3105 rotates, the docking rods 3109 drive the engaging holes 206 of the drive ring 205 to rotate, causing the transmission ring 3105 and the drive ring 205 to rotate synchronously. A servo motor 2 3110 is fixedly installed at the center of the sealing ring cover 3101, and a bottom groove rod 3112 is fixedly assembled at the output end of the servo motor 2 3110, and the bottom inner wall of the bottom groove rod 3112 is provided with an inner hexagonal groove; A hexagonal block 217 is fixedly installed at the center of the surface of the heat-insulating chassis 203. When the sealing ring cover 3101 is installed on the refrigerator 1, the hexagonal slot at the bottom of the bottom slot rod 3112 is clamped on the hexagonal block 217. After the second servo motor 3110 is started, the started servo motor 3110 drives the bottom slot rod 3112 to rotate, so that the bottom slot rod 3112 passes through the hexagonal block 217 clamped in the hexagonal slot to drive the heat-insulating chassis 203 to rotate. The sealing ring cover 3101 is provided with a placement groove 3111 vertically extending therethrough corresponding to the position of the single inner edge box 213. A sealing cover 3115 is provided on the inner side of the placement groove 3111 in a spiral seal. The entrance for placing the bedrock weathering layer soil sample on the inner wall of the cold storage box 1 is only the placement groove 3111, which can facilitate the heat preservation treatment inside the cold storage box 1. A bottom push frame 3113 is vertically slidably provided on the top of the placement groove 3111, and a return spring 3114 is assembled between the bottom push frame 3113 and the sealing ring cover 3101; when the bottom push frame 3113 is subjected to pressure from the palm of a person, the bottom push frame 3113 descends, so that the bottom push frame 3113 pushes the inner edge box 213 below the placement groove 3111, so that the inner edge box 213 descends along the sample placement box 210 to the inside of the dry ice bath box 5, and the bedrock weathering layer sample placed in the isolation structure 21 is extended into the dry ice bath box 5, which can quickly freeze the isolation structure 21 while reducing the freezing time of the bedrock weathering layer sample and improving the efficiency of the frozen storage of the bedrock weathering layer sample.

[0026] According to the above embodiment, the working principle of the present invention is: In the mechanical refrigeration cycle refrigeration device 4, the compression process compresses the low-pressure gaseous refrigerant into a high-pressure gaseous state through the compressor, thereby increasing its temperature; in the condensation process, the high-pressure gaseous refrigerant enters the condenser, dissipates heat through the cooling fan, and condenses into a high-pressure liquid state; in the throttling process, the high-pressure liquid refrigerant is depressurized by the throttle valve throttling device and becomes a low-pressure gas-liquid mixed state; in the evaporative refrigeration process, the low-pressure gas-liquid mixed refrigerant enters the evaporator, absorbs the heat inside the refrigerated box 1, evaporates into a gaseous state, and reduces the temperature inside the box to -30°C. Then the gaseous refrigerant returns to the compressor, completing the cycle; Dry ice assisted refrigeration, liquid dry ice is placed in the dry ice bath box 5, which can quickly freeze the microorganisms in the bedrock weathering layer soil that are in contact with the inner edge box 213 and the microorganisms placed inside the isolation structure 21; The dry ice box holder 208 is made of aluminum alloy and has an internal capacity of 100ml of dry ice. The box lid 209 is sealed by magnetic attraction. After the refrigeration device is started, the compressor runs at a power of 1.5kW, and cooperates with the dry ice bath box at -78℃ to achieve dual refrigeration, allowing the sample to drop from 25℃ to -30℃ within 5 minutes. The isolation membrane 2101 is a disposable medical-grade PE film. The cold water membrane 2102 is injected with an ethylene glycol solution accounting for 60% by volume. The arc airbag 2103 is pre-filled with nitrogen to 10kPa. After the servo motor 3110 drives the insulation chassis 203 to rotate 90°, pressing the bottom push frame 3113 can lower the inner edge box 213 by 3cm into the dry ice bath liquid. The elastic coefficient of the tension spring 216 is 50N / m, ensuring a reset accuracy of ±1mm. The sample storage and drive adjustment principle: The drive mechanism of the sample storage structure 2 is driven by a servo motor 3108: the servo motor 3108 drives the spur gear 3107 to rotate, engaging the outer gear ring 3106 to rotate the transmission ring 3105. The docking rod 3109 is inserted into the engaging hole 206 of the drive ring 205, rotating the drive ring 205 independently, so that the drive ring 205 rotates at a single 45° angle relative to the sample storage boxes 210, facilitating the storage of the bedrock weathered layer soil being studied. The servo motor 3110 is driven by the second servo motor 3110. The servo motor 3110 engages with the hexagonal block 217 of the insulation chassis 203 through the hexagonal slot of the bottom slot rod 3112, directly driving the insulation chassis 203 to rotate. The insulation chassis 203 can be opened and closed during the initial cooling of the bedrock weathering layer soil sample under study. In the opened state, the personnel presses the bottom push frame 3113 to lower the inner edge box 213 into the dry ice bath box 5 for rapid cooling. When the insulation chassis 203 is in the closed state, the dry ice bath box 5 can be sealed and kept warm. Sample access and positioning: When placing a sample, open the sealing cover 3115, press the bottom push frame 3113, compress the return spring 3114, and the bottom push frame 3113 pushes the inner edge box 213 down along the sample placement box 210, sending the sample into the dry ice bath box 5 for freezing. The return spring 3114 resets within 0.5 seconds after releasing the bottom push frame 3113. After releasing the bottom push frame 3113, the tension spring 216 pushes the inner edge box 213 to reset, and the sample rises to the vicinity of the placement groove 3111 for easy removal. When removing, the isolation structure 21 and the stored sample are directly removed at the same time; Isolation and protection structure principle: Anti-pollution isolation: The sample storage tube is wrapped with a disposable plastic film through the isolation membrane 2101, which prevents direct contact between the sample and the internal environment of the storage device and prevents cross contamination. Anti-expansion protection: Arc airbags 2103 are distributed on the inner and outer edges of the isolation membrane 2101 to isolate the sample tube from the refrigerant liquid in the cold water membrane 2102. When the refrigerant liquid freezes and expands, the arc airbags 2103 buffer the pressure to prevent deformation and rupture of the sample tube. Based on the principle of air circulation and heat preservation, the cold air circulation path is that the cold air generated by the refrigeration device 4 enters the refrigerated inner box 201 through the ventilation ring 202. The specific apertures of the ventilation ring 202 and the ventilation screen 211 are designed to be "aperture 2mm, opening rate 60%" to avoid cold air short circuit; Two groups of batteries 8 power servo motor 1 3108, servo motor 2 3110 and refrigeration device 4 to ensure the portability and continuous operation of the device. The controller 7 adjusts the working state of the refrigeration device 4 to maintain a low temperature of -30°C according to the feedback from the temperature sensor, and at the same time controls the start and stop and speed of the servo motor to realize automatic adjustment of the sample preservation structure 2. The controller 7 has a built-in temperature sensor for real-time monitoring of the cold storage box 1. The division of labor logic between servo motor 1 3108 and servo motor 2 3110 is that servo motor 1 3108 only drives the sample placement box 210 to rotate and position, and servo motor 2 3110 controls the opening and closing of the insulation chassis 203.

[0027] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative work should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention are implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A device for preserving bedrock regolith samples based on Earth's critical zone research, comprising: A refrigerator, wherein a refrigeration device is installed inside the refrigerator; It is characterized by further comprising a sample preservation structure installed inside the refrigerator; The top of the refrigerator is equipped with an adjustment drive structure that cooperates with the sample preservation structure; The sample preservation structure has a built-in isolation structure for isolating and storing bedrock weathering layer sample storage tubes; The sample preservation structure includes a refrigerated box fixedly arranged inside the refrigerated inner box, and the outer edges of the upper and lower ends of the refrigerated inner box are equipped with ventilation rings; An insulation chassis is rotatably mounted on the inner side of the bottom of the refrigerated inner box, and an extension groove is provided through the bottom of the insulation chassis. A dry ice bath box is provided below the extension groove, and an assembly groove is provided on the side of the refrigerated box at a position corresponding to the dry ice bath box.

2. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 1, characterized in that: A driving ring is rotatably mounted at the center of the heat-insulating chassis, and a plurality of dry ice box racks for storing dry ice boxes are fixedly arranged at equal intervals on the outer wall of the driving ring in a circular shape.

3. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 2, characterized in that: A sample placement box is fixedly provided at one end of the dry ice box rack away from the driving ring, and a vertical limiting groove is provided inside the sample placement box; A limiting box is slidably provided on the inner side of the vertical limiting groove, and an inner edge box located inside the sample placement box is fixedly assembled on the inner edge of the bottom of the limiting box; A tension spring is provided between the inner edge box and the sample placement box, and a reset groove is provided at a position of the inner edge box corresponding to the tension spring, and the tension spring is installed inside the reset groove.

4. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 3, characterized in that: The isolation structure includes an isolation membrane arranged inside the inner edge box, and a cold water membrane is arranged inside the isolation membrane; The inner and outer edges of the isolation membrane are both annular and are provided with a plurality of arc air bags at equal distances.

5. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 1, characterized in that: The adjustment drive structure includes a sealing ring cover located above the refrigerated inner box, a sealing cover plate is integrally fixed to the outer side of the sealing ring cover, and a sealing ring is integrally fixed to the bottom of the sealing ring cover; A sealing ring groove is provided at a position of the refrigerator corresponding to the closed ring, and the sealing ring cover is sealed and docked to the inner side of the sealing ring groove of the refrigerator through the closed ring.

6. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 5, characterized in that: A ventilation groove is provided inside the sealing ring cover, and a transmission ring is rotatably mounted at the center of the ventilation groove. An outer gear ring is fixedly mounted on the outer wall of the transmission ring, and the outer gear ring is meshed with a spur gear. The top of the spur gear is connected to a servo motor 1; The bottom of the transmission ring is annular and fixed with a plurality of docking rods at equal distances.

7. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 6, characterized in that: A snap-in hole is provided at the top of the driving ring at a position corresponding to the docking rod; The transmission ring is inserted into the engaging hole of the driving ring through the engaging rod to complete the engaging and engaging engagement.

8. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 6, characterized in that: A servo motor 2 is fixedly installed at the center of the sealing ring cover, and a bottom slot rod is fixedly assembled at the output end of the servo motor 2, and an inner hexagonal slot is opened on the inner wall of the bottom end of the bottom slot rod; A hexagonal block is fixedly installed at the center of the surface of the heat-insulating chassis. When the sealing ring cover is installed on the refrigerator, the hexagonal slot at the bottom of the bottom slot rod is clamped on the hexagonal block.

9. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 8, characterized in that: The sealing ring cover is provided with a placement groove in a vertical direction corresponding to the position of the single inner edge box, and a closing cover is spirally sealed on the inner side of the placement groove.

10. The device for preserving bedrock weathering layer samples based on the study of the Earth's critical zone according to claim 9, characterized in that: A bottom push frame is vertically slidably provided on the top of the placement groove, and a return spring is assembled between the bottom push frame and the sealing ring cover.

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