Multiple liquid nitrogen tank access device

Abstract

The embodiment of the present application provides a single-taken multiple liquid nitrogen tank storage and taking equipment, and relates to the field of biological sample bank sample storage and taking. The present application is aimed at improving the problems of easy inactivation, low efficiency and danger of biological samples in the existing frozen tube manual storage and taking process. The present application comprises a storage rack, a liquid nitrogen tank, a tube taking group and a transmission group. The storage rack is fixed in the liquid nitrogen tank, and the storage rack is provided with a plurality of first placing grooves. The tube taking group comprises a moving rack and a plurality of clamping jaws. The moving rack is provided with a plurality of second placing grooves. The transmission group is arranged on the liquid nitrogen tank, and the transmission group is connected with the moving rack. The transmission group is used for driving the moving rack to move, so that the moving rack moves into the storage rack and expands, or moves out of the storage rack and gathers. Through the expansion of the moving rack by moving downward, the tube taking group enters the storage rack, the moving rack expands rapidly in the storage rack, and the tube taking group cooperates with the storage rack to realize the accurate transfer of the frozen tube. The tube taking group does not need manual tube taking, the operation time is short, and the efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of biobank sample storage and retrieval, and more specifically, to a liquid nitrogen tank storage and retrieval device for retrieving multiple samples at a time. Background Technology

[0002] Cryogenic storage is an important method for preserving the activity of biological samples. The conventional method is to store biological samples in liquid nitrogen tanks. When the target cryovial needs to be retrieved, most existing technologies involve manual retrieval. When lifting the cryopreservation basket to select the target cryovial, the other cryovials are exposed to the ambient temperature environment. Repeated operations will destroy the activity of the biological samples, which is extremely harmful to the biological samples. In addition, the operation is time-consuming and inefficient, and prolonged exposure to the low temperature environment may also have adverse effects on human health. Summary of the Invention

[0003] The present invention aims to provide, for example, a liquid nitrogen tank storage and retrieval device that can retrieve multiple tanks at a time, which can improve the problems of easy inactivation of biological samples, low efficiency, and danger in the existing manual storage and retrieval process of cryopreservation tubes.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] An embodiment of the present invention provides a liquid nitrogen tank storage and retrieval device for retrieving multiple cryopreservation tubes at a time, comprising a storage rack, a liquid nitrogen tank, a tube retrieval assembly, and a transmission assembly: the storage rack is fixed inside the liquid nitrogen tank and is provided with a plurality of first placement slots for placing cryopreservation tubes; the tube retrieval assembly includes a movable frame and a plurality of grippers; the movable frame is capable of unfolding or closing and is provided with a plurality of second placement slots, and the plurality of grippers correspond one-to-one with the plurality of second placement slots and are magnetically assembled together; the transmission assembly is disposed on the liquid nitrogen tank and is connected to the movable frame, and is used to drive the movable frame to move so that the movable frame moves into the storage rack and unfolds, or moves out of the storage rack and closes; each second placement slot is used to correspond to a first placement slot when the movable frame is unfolded; the grippers in each second placement slot are used to leave the second placement slot under magnetic repulsion to enter the first placement slot and grip the cryopreservation tubes, or the grippers are used to reset under magnetic attraction to move the gripped cryopreservation tubes into the second placement slot.

[0006] In addition, the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time provided in the embodiments of the present invention may also have the following additional technical features:

[0007] Optionally, the movable frame includes an upper movable disk, a lower movable disk, an upper movable frame, and a lower movable frame; both the upper movable frame and the lower movable frame are vertically arranged, the top end of the upper movable frame is slidably connected to the upper movable disk, and the bottom end of the lower movable frame is slidably connected to the lower movable disk. When the movable frame is in the unfolded state, the outer side of the upper movable frame can slide and engage with the inner side of the lower movable frame, so that the upper movable frame and the lower movable frame are unfolded side by side; when the movable frame is in the converged state, the bottom end of the upper movable frame can slide and engage with the top end of the lower movable frame, so that the upper movable frame and the lower movable frame overlap and converge; both the upper movable frame and the lower movable frame are provided with a plurality of second placement slots;

[0008] The transmission assembly is connected to both the upper moving disk and the lower moving disk. The transmission assembly is used to drive the upper moving disk and the lower moving disk to move closer to or further away from each other, so that the upper moving frame and the lower moving frame can switch between the unfolded state and the converged state.

[0009] Optionally, the storage rack includes multiple storage blades, which are arranged in a circular manner to form a hollow columnar structure. Each storage blade is provided with a gap that opens toward the hollow position, and multiple first placement slots are provided on both sides of the gap.

[0010] There are multiple upper and lower moving frames, and the multiple upper and lower moving frames are arranged around the line connecting the centers of the upper and lower moving disks. The top ends of the multiple upper moving frames are slidably connected to the upper moving disk along the radial direction, and the bottom ends of the multiple lower moving frames are slidably connected to the lower moving disk along the radial direction. Each upper moving frame has an upper moving frame inclined surface at its bottom end, and each lower moving frame has a lower moving frame inclined surface at its top end. The upper moving frame inclined surface and the lower moving frame inclined surface slide in cooperation.

[0011] The transmission assembly is used to drive the upper and lower moving frames to extend into the gap in the unfolded state, so that the second placement slot corresponds to the position of the first placement slot; or the transmission assembly is used to drive the upper and lower moving frames to leave the liquid nitrogen tank in the converged state.

[0012] Optionally, the transmission assembly includes a first drive mechanism and a second drive mechanism; the first drive mechanism is disposed on the liquid nitrogen tank and connected to the second drive mechanism, the first drive mechanism being used to drive the first drive mechanism, the upper moving disk, the lower moving disk, the upper moving frame, and the lower moving frame to move synchronously into or out of the storage rack; the second drive mechanism is connected to the upper moving disk and the lower moving disk, the second drive mechanism being used to drive the upper moving disk and the lower moving disk to move closer to or further away from each other, so that the upper moving frame and the lower moving frame unfold or converge.

[0013] Optionally, the first driving mechanism includes a first motor, a screw, a support frame, and a movable plate; the support frame is fixed on the liquid nitrogen tank, the screw is rotatably disposed within the support frame in a vertical direction, the movable plate is slidably disposed within the support frame in a vertical direction, and the movable plate is threadedly connected to the screw, and the movable frame is connected to the movable plate; the first motor is fixed on the support frame and connected to the screw; the first motor is used to drive the screw to rotate, thereby driving the movable plate and the movable frame to reciprocate in a vertical direction, so as to move into or out of the storage rack.

[0014] Optionally, the second driving mechanism includes a support rod, a rack, a gear, and a second motor; the support rod is arranged vertically, and its top end is fixed to the moving plate; the rack is fixed side-by-side on the support rod vertically; the upper moving disk, the upper moving frame, and the lower moving frame are movably sleeved on the outer periphery of the support rod and the rack; the lower moving disk is fixed to the bottom end of the support rod; the second motor and the gear are fixed to the top of the upper moving disk; the second motor is connected to the gear, and the gear meshes with the rack; the second motor drives the gear to move along the rack, thereby driving the upper moving disk to move closer to or away from the lower moving disk.

[0015] Optionally, the transmission assembly further includes a first electromagnet, a second magnet, a third magnet, and a fourth magnet fixed thereon; the first electromagnet is fixed to the upper half of the support rod and can be energized in both directions, the second magnet is fixed to the upper moving frame, and the first electromagnet is used to repel the second magnet so that the upper moving frame moves away from the support rod, or the first electromagnet is used to attract the second magnet so that the upper moving frame moves closer to the support rod; the third magnet is fixed to the lower half of the support rod, and the fourth magnet is fixed to the lower moving frame, and the third magnet and the fourth magnet attract each other.

[0016] Optionally, a first sliding groove is provided through the second placement groove along its thickness; a fifth electromagnet, a sixth magnet, and a seventh electromagnet are sequentially arranged in the first sliding groove along its thickness direction, with the fifth electromagnet and the seventh electromagnet located on opposite sides of the second placement groove; the gripper is slidably disposed in the first sliding groove along the thickness direction of the second placement groove, and an eighth magnet is provided on the outer wall of the gripper, which attracts the sixth magnet; the eighth magnet is used to repel or attract the fifth electromagnet, so that the gripper can reciprocate between the first sliding groove and the first placement groove from the side of the fifth electromagnet in the second placement groove; or the eighth magnet is used to repel or attract the seventh electromagnet, so that the gripper can reciprocate between the first sliding groove and the first placement groove from the side of the seventh electromagnet in the second placement groove.

[0017] Optionally, the gripper includes a first clamping part, a second clamping part, and a connector; a clamping space for clamping cryopreservation tubes is formed between the first clamping part and the second clamping part; two clamping openings communicating with the clamping space are formed between the opposite side edges of the first clamping part and the second clamping part; each of the two clamping openings is provided with an elastic protrusion to allow the cryopreservation tube to move into or out of the clamping space; the eighth magnet is fixed to the back of the first clamping part or the second clamping part and can magnetically engage with the sixth magnet on the first slide groove; the bottoms of the first clamping part and the second clamping part are fixed by the connector to allow the first clamping part and the second clamping part to move synchronously.

[0018] Optionally, the first placement groove is provided with a second sliding groove, a limiting circular groove, and a circular groove outlet. The second sliding groove is arranged along the thickness direction of the first placement groove and is used to slide and engage with the gripper. The limiting circular groove is arranged at the bottom of the first placement groove and is used to limit the bottom of the cryopreservation tube. The opening of the circular groove is opened on the side of the limiting circular groove. The circular groove outlet is elastic and is used for the cryopreservation tube to be moved into or out of the limiting circular groove.

[0019] The beneficial effects of the liquid nitrogen tank retrieval device for retrieving multiple tanks at a time according to embodiments of the present invention include, for example:

[0020] A liquid nitrogen tank retrieval device for retrieving multiple cryopreservation tubes at a time includes a storage rack, a liquid nitrogen tank, a tube retrieval assembly, and a transmission assembly. The storage rack is fixed inside the liquid nitrogen tank and has multiple first placement slots for placing cryopreservation tubes. The tube retrieval assembly includes a movable frame and multiple grippers. The movable frame can be deployed or retracted and has multiple second placement slots. The grippers correspond one-to-one with the multiple second placement slots and are magnetically assembled together. The transmission assembly is mounted on the liquid nitrogen tank and connected to the movable frame. The transmission assembly drives the movable frame to move, so that the movable frame moves into the storage rack and deploys, or moves out of the storage rack and retracts. Each second placement slot corresponds to a first placement slot when the movable frame is deployed. The grippers in each second placement slot are used to leave the second placement slot under magnetic repulsion to enter the first placement slot and retrieve the cryopreservation tube, or the grippers are used to reset under magnetic attraction to move the retrieved cryopreservation tube into the second placement slot.

[0021] By lowering and unfolding the tube retrieval assembly, it enters the storage rack. The moving rack then quickly unfolds within the storage rack. The tube retrieval assembly and storage rack work together to precisely transfer cryopreserved tubes without manual removal, significantly improving efficiency and reducing operation time. Only the cryopreserved tubes that need to be removed are transferred, ensuring that the remaining cryopreserved tubes are not exposed to room temperature, thus preventing biological sample deactivation. Through the coordinated operation of the tube retrieval assembly, storage rack, and cryopreserved tubes, the problems of dangerous manual handling, low efficiency, and easy deactivation of biological samples in existing liquid nitrogen tank storage and retrieval equipment are solved. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A front view of the overall structure of the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0024] Figure 2 The right view of the transmission assembly and the tube assembly in the liquid nitrogen tank retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0025] Figure 3 A front view of the support frame in the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0026] Figure 4 A front view of the moving plate in the liquid nitrogen tank storage and retrieval device that can retrieve multiple tanks at a time, as provided in an embodiment of the present invention;

[0027] Figure 5 Rear view of the upper moving disk in the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0028] Figure 6 A top view of the upper moving disk in the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0029] Figure 7 A front view of the upper moving frame in the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0030] Figure 8 A front view of the upper moving frame and grippers in the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0031] Figure 9 A front view of the gripper in the liquid nitrogen tank retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0032] Figure 10 A front view of the lowering rack in the liquid nitrogen tank retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0033] Figure 11 A front view of the lower moving disk in the liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0034] Figure 12 A front view of the storage rack in the liquid nitrogen tank retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention;

[0035] Figure 13 A front view of the storage rack and liquid nitrogen tanks in the liquid nitrogen tank retrieval device for retrieving multiple liquid nitrogen tanks at a time, provided in an embodiment of the present invention;

[0036] Figure 14 A state view of a liquid nitrogen tank storage and retrieval device that can retrieve multiple tanks at a time, as provided in an embodiment of the present invention;

[0037] Figure 15 for Figure 14 Enlarged view of section A;

[0038] Figure 16 This is a two-view diagram of the state of a liquid nitrogen tank storage and retrieval device that can retrieve multiple tanks at a time, provided in an embodiment of the present invention.

[0039] Figure 17 for Figure 16 Enlarged view of section B;

[0040] Figure 18 A three-view diagram of the state of a liquid nitrogen tank storage and retrieval device that can retrieve multiple tanks at a time, provided in an embodiment of the present invention;

[0041] Figure 19 for Figure 18 Enlarged view of section C;

[0042] Figure 20 Four-view diagrams of the state of a liquid nitrogen tank storage and retrieval device that can retrieve multiple tanks at a time, as provided in an embodiment of the present invention;

[0043] Figure 21 A view showing the state of the upper moving frame, lower moving frame, cryopreservation tube, and storage blades in a liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention.

[0044] Figure 22 Two views showing the states of the upper moving frame, lower moving frame, cryopreservation tube, and storage blades in a liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, provided in an embodiment of the present invention.

[0045] Icons: 100-Transmission assembly; 110-First motor; 120-Screw; 130-Support frame; 131-First round hole; 132-Limiting slide; 140-Moving plate; 141-First square hole; 142-Second round hole; 150-Support rod; 160-Rack; 170-Gear; 180-Second motor; 200-Tuberculum assembly; 210-Upper moving disc; 211-Rectangular hole; 212-Limiting frame; 213-Upper axial groove; 214-Upper radial groove; 220-Upper moving frame; 221-T-shaped protrusion; 222-Second placement groove; 223-First slide groove; 224-Fifth electromagnet; 225-Sixth magnet; 226- Seventh electromagnet; 227-Upper moving frame inclined surface; 230-Gripper; 231-Clamping surface; 232-Protruding plate; 233-Limiting plate; 234-Eighth magnet; 240-Lower moving frame; 241-T-shaped groove; 247-Lower moving frame inclined surface; 250-Lower moving disc; 251-Second square hole; 252-Lower radial groove; 253-Lower axial groove; 300-Storage rack; 310-Long strip protrusion; 320-Storage blade; 330-First placement groove; 340-Second sliding groove; 350-Limiting circular groove; 360-Circular groove outlet; 370-Baffle; 400-Cryopreservation tube; 500-Liquid nitrogen tank; 510-Storage port; 520-Limiting square groove. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0050] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0051] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0052] The following is combined Figures 1 to 22 The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, as provided in this embodiment, will be described in detail.

[0053] Please refer to Figures 1 to 22This embodiment provides a liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time, including a storage rack 300, a liquid nitrogen tank 500, a tube retrieval assembly 200, and a transmission assembly 100: the storage rack 300 is fixed inside the liquid nitrogen tank 500, and the storage rack 300 is provided with multiple first placement slots 330 for placing cryopreservation tubes 400; the tube retrieval assembly 200 includes a movable frame and multiple grippers 230; the movable frame can be unfolded or folded, and the movable frame is provided with multiple second placement slots 222, and the multiple grippers 230 correspond one-to-one with the multiple second placement slots 222 and are magnetically assembled together; the transmission assembly 100 is installed in the liquid nitrogen tank 500. On the 00, the transmission assembly 100 is connected to the movable frame. The transmission assembly 100 is used to drive the movable frame to move so that the movable frame moves into the storage rack 300 and unfolds, or moves out of the storage rack 300 and gathers. Each second placement slot 222 is used to correspond to the first placement slot 330 when the movable frame is unfolded. The gripper 230 in each second placement slot 222 is used to leave the second placement slot 222 under the action of magnetic repulsion so as to enter the first placement slot 330 and grip the cryopreservation tube 400, or the gripper 230 is used to reset under the action of magnetic attraction so as to clamp and move the gripped cryopreservation tube 400 into the second placement slot 222.

[0054] Specifically, the storage rack 300 is fixed inside the liquid nitrogen tank 500, and the cryopreservation tubes 400 are placed in the first placement slot 330 of the storage rack 300. The transmission assembly 100 drives the moving frame to move into the storage rack 300 and unfold, so that the second placement slot 222 on the moving frame corresponds one-to-one with the first placement slot 330. Then, through the magnetic repulsion between the gripper 230 and the second placement slot 222, the gripper 230 is driven to enter the first placement slot 330 to grab the cryopreservation tube 400. Then, through the magnetic attraction between the gripper 230 and the second placement slot 222, the gripper 230 and the grabbed cryopreservation tube 400 are attracted and returned to the second placement slot 222. Then, the transmission assembly 100 drives the moving frame to converge and move upward, removing it from the storage rack 300, thus completing the grabbing of the cryopreservation tube 400. The number of first placement slots 330, grippers 230, and second placement slots 222 is large, allowing multiple cryopreservation tubes 400 to be grabbed simultaneously.

[0055] By lowering and unfolding the tube retrieval assembly 200, it enters the storage rack 300. The moving rack quickly unfolds within the storage rack 300. The tube retrieval assembly 200 and the storage rack 300 work together to precisely transfer the cryopreservation tubes 400, eliminating the need for manual tube removal and significantly improving efficiency due to the short operation time. Only the cryopreservation tubes 400 that need to be removed are transferred, ensuring that the remaining cryopreservation tubes 400 do not need to be exposed to room temperature, thus preventing the biological samples from becoming inactivated. Through the coordinated operation of the tube retrieval assembly 200, the storage rack 300, and the cryopreservation tubes 400, the problems of dangerous manual handling, low efficiency, and easy inactivation of biological samples in existing liquid nitrogen tank 500 storage and retrieval equipment are solved.

[0056] Reference Figure 1 , Figure 2 , Figure 14 , Figure 16 , Figure 18 , Figure 20 In this embodiment, the movable frame includes an upper movable disc 210, a lower movable disc 250, an upper movable frame 220, and a lower movable frame 240. Both the upper movable frame 220 and the lower movable frame 240 are vertically arranged. The top end of the upper movable frame 220 is slidably connected to the upper movable disc 210, and the bottom end of the lower movable frame 240 is slidably connected to the lower movable disc 250. When the movable frame is in the unfolded state, the outer side of the upper movable frame 220 can slide and engage with the inner side of the lower movable frame 240, so that the upper movable frame 220 and the lower movable frame 240 unfold side-by-side. When the movable frame is in the converged state... In this state, the bottom end of the upper moving frame 220 can slide and engage with the top end of the lower moving frame 240, so that the upper moving frame 220 and the lower moving frame 240 overlap and converge; both the upper moving frame 220 and the lower moving frame 240 are provided with multiple second placement slots 222; the transmission group 100 is connected to both the upper moving disc 210 and the lower moving disc 250, and the transmission group 100 is used to drive the upper moving disc 210 and the lower moving disc 250 to move closer or further away from each other, so that the upper moving frame 220 and the lower moving frame 240 can switch between the unfolded state and the converged state.

[0057] With the movable frame in its converged state, the upper movable disc 210, upper movable frame 220, lower movable frame 240, and lower movable disc 250 are arranged sequentially from top to bottom. The bottom of the upper movable frame 220 slides into contact with the top of the lower movable frame 240. The upper movable frame 220 slides from the top of the lower movable frame 240 to the inside of the lower movable frame 240, achieving a sliding engagement between the outer side of the upper movable frame 220 and the inner side of the lower movable frame 240. At this point, the movable frame is in its extended state. In other words, the bottom and outer side of the upper movable frame 220 are in continuous sliding engagement with the top and inner side of the lower movable frame 240, thus enabling the switching between the two states. In the folded state, the upper moving frame 220 overlaps the top of the lower moving frame 240, with a small cross-sectional area, making it easy to enter or exit the storage rack 300. In the unfolded state, the upper moving frame 220 and the lower moving frame 240 are staggered, which can increase the number of corresponding first placement slots 330 in the storage rack 300 and increase the number of cryopreservation tubes 400 that can be picked up each time.

[0058] Specifically, the lower moving frame 240 is located below the upper moving frame 220, and a corresponding lower moving frame 240 is set below each upper moving frame 220. The upper moving disc 210 is located above the upper moving frame 220 and is used to limit the upper moving frame 220. The lower moving disc 250 is located below the lower moving frame 240 and supports and limits the lower moving frame 240.

[0059] Reference Figure 5 as well as Figure 6The upper movable disk 210 is provided with a rectangular hole 211, a limiting frame 212, an upper axial groove 213, and an upper radial groove 214. The rectangular hole 211 is located in the middle of the main body of the upper movable disk 210, and the rectangular hole 211 cooperates with the support rod 150 mentioned below, so that the upper movable disk 210 can move up and down relative to the support rod 150. The limiting frame 212 is located on one side of the rectangular hole 211, and the limiting frame 212 is fixedly connected to the second motor 180 mentioned below, so that the limiting frame 212 limits the second motor 180. The upper axial grooves 213 are evenly distributed on the outer circumference of the upper movable disk 210, and four are set, the number depending on the situation. The upper axial grooves 213 are used to slide with the elongated protrusions 310 mentioned below, and the upper axial grooves 213 serve as a limiting function. The upper radial grooves 214 are located at the lower end of the main body of the upper movable disk 210, and the upper radial grooves 214 are set along the radial direction of the upper movable disk 210. Eight upper radial grooves 214 are evenly set, the number depending on the situation. The upper radial grooves 214 serve as a limiting function.

[0060] Reference Figure 11 The lower movable disk 250 is provided with a second square hole 251, a lower radial groove 252, and a lower axial groove 253. The second square hole 251 is located in the middle of the main body of the lower movable disk 250 and is fixedly connected to the support rod 150 mentioned below. The lower radial groove 252 is located at the upper end of the main body of the lower movable disk 250 and is arranged radially along the lower movable disk 250. The number of lower radial grooves 252 is the same as the number of lower moving frames 240, and the bottom end of the lower moving frame 240 slides in engagement with the lower radial grooves 252. The lower axial grooves 253 are evenly distributed on the outer circumference of the lower movable disk 250, and there are four of them. The number depends on the situation. The lower axial grooves 253 slide in engagement with the elongated protrusion 310 mentioned below and serve as a limiting function.

[0061] Reference Figure 12 , Figure 13 , Figure 15In this embodiment, the storage rack 300 includes multiple storage blades 320, which are arranged in a hollow columnar structure. Each storage blade 320 has a gap that opens towards the hollow position, and multiple first placement slots 330 are provided on both sides of the gap. There are multiple upper moving racks 220 and multiple lower moving racks 240, which are arranged around the line connecting the centers of the upper moving disk 210 and the lower moving disk 250. The top ends of the multiple upper moving racks 220 are slidably connected to the upper moving disk 210 along the radial direction of the upper moving disk 210. The bottom ends of multiple lower moving frames 240 are slidably connected to the lower moving disk 250 along the radial direction of the lower moving disk 250. The bottom end of each upper moving frame 220 is provided with an upper moving frame inclined surface 227, and the top end of each lower moving frame 240 is provided with a lower moving frame inclined surface 247. The upper moving frame inclined surface 227 and the lower moving frame inclined surface 247 are slidably engaged. The transmission group 100 is used to drive the upper moving frame 220 and the lower moving frame 240 to extend into the gap in the unfolded state so that the second placement slot 222 corresponds to the position of the first placement slot 330. Alternatively, the transmission group 100 is used to drive the upper moving frame 220 and the lower moving frame 240 to leave the liquid nitrogen tank 500 in the converged state.

[0062] Reference Figure 16 as well as Figure 17 The bottom of the upper moving frame 220 and the top of the lower moving frame 240 are connected by a sloping sliding engagement. Therefore, during the process of driving the upper moving frame 220 to move downward, the lower moving frame 240 can be moved to the inside of the lower moving frame 240, realizing the switch from the sliding engagement between the bottom of the upper moving frame 220 and the lower moving frame 240 to the sliding engagement between the outside of the upper moving frame 220 and the inside of the lower moving frame 240.

[0063] The upper moving frame 220 has an upper moving frame inclined surface 227 at its bottom, located at the lower end of the main body of the upper moving frame 220, and the upper moving frame inclined surface 227 serves a pushing function. The lower moving frame 240 has a lower moving frame inclined surface 247 at its top, located at the upper end of the main body of the lower moving frame 240, and the lower moving frame inclined surface 247 cooperates with the upper moving frame inclined surface 227. Both the lower moving frame inclined surface 247 and the upper moving frame inclined surface 227 slope from top to bottom, and the outer height is higher than the inner height, that is, they slope downward from the outer periphery towards the center of the circle, and the height at the outer circle is higher than the height at the center.

[0064] While the transmission assembly 100 drives the upper moving frame 220 to move to the inside of the lower moving frame 240, it pushes the lower moving frame 240 to move into the gap. Then, it pushes the upper moving frame 220 and the lower moving frame 240 into the gap together, realizing the correspondence between the first placement slot 330 and the second placement slot 222. After the cryopreservation tube 400 is clamped, the transmission assembly 100 drives the upper moving frame 220 to move upward, while the lower moving frame 240 converges until the upper moving frame 220 moves to the top of the lower moving frame 240, completing the reset and clamping of the cryopreservation tube 400.

[0065] In this embodiment, the transmission assembly 100 includes a first driving mechanism and a second driving mechanism. The first driving mechanism is disposed on the liquid nitrogen tank 500 and is connected to the second driving mechanism. The first driving mechanism is used to drive the first driving mechanism, the upper moving disk 210, the lower moving disk 250, the upper moving frame 220, and the lower moving frame 240 to move synchronously into or out of the storage rack 300. The second driving mechanism is connected to the upper moving disk 210 and the lower moving disk 250 and is used to drive the upper moving disk 210 and the lower moving disk 250 to move closer to or further away from each other, so that the upper moving frame 220 and the lower moving frame 240 unfold or converge.

[0066] The first drive mechanism drives the entire moving frame to move up and down. The second drive mechanism drives the relative sliding of the upper moving frame 220 and the lower moving frame 240 to achieve unfolding and folding. After the first drive mechanism drives the moving frame into the storage rack 300, the second drive mechanism drives the upper moving frame 220 and the lower moving frame 240 to slide relative to each other, achieving unfolding and completing the gripping of the cryopreservation tube 400. After gripping, the second drive mechanism drives the upper moving frame 220 and the lower moving frame 240 to slide relative to each other, achieving folding. The first drive mechanism drives the moving frame out of the storage rack 300. The driving times of the first and second drive mechanisms can overlap.

[0067] In this embodiment, the first driving mechanism includes a first motor 110, a screw 120, a support frame 130, and a movable plate 140. The support frame 130 is fixed on the liquid nitrogen tank 500. The screw 120 is rotatably disposed within the support frame 130 in the vertical direction. The movable plate 140 is slidably disposed within the support frame 130 in the vertical direction, and the movable plate 140 is threadedly connected to the screw 120. The movable frame is connected to the movable plate 140. The first motor 110 is fixed on the support frame 130 and is connected to the screw 120. The first motor 110 is used to drive the screw 120 to rotate, thereby driving the movable plate 140 and the movable frame to reciprocate in the vertical direction, so as to move into or out of the storage rack 300.

[0068] Reference Figure 3 , Figure 4Specifically, the transmission assembly 100 is located on top of the main body and serves as the transmission unit. The first motor 110 provides power. The screw 120 is located below the first motor 110 and is fixedly connected to the motor shaft of the first motor 110. The support frame 130 is provided with a first circular hole 131 and a limiting slide rail 132. The first circular hole 131 is located at the upper end of the main body of the support frame 130 and is connected to the screw 120 via a bearing. The limiting slide rail 132 is located below the first circular hole 131 and serves as a limiting mechanism. The movable plate 140 is located in front of the first motor 110, and its rear end slides in engagement with the limiting slide rail 132. The movable plate 140 is provided with a first square hole 141 and a second round hole 142; the first square hole 141 is located at the front end of the main body of the movable plate 140; the second round hole 142 is located at the rear end of the main body of the movable plate 140, the interior of the second round hole 142 is threaded, and the second round hole 142 is threadedly connected to the screw 120.

[0069] The first motor 110 drives the screw 120 to rotate. The rotation of the screw 120 causes the moving plate 140 to move up and down along the limiting slide 132, thereby causing the moving frame to move up and down.

[0070] In this embodiment, the second driving mechanism includes a support rod 150, a rack 160, a gear 170, and a second motor 180. The support rod 150 is arranged vertically, and its top end is fixed to the moving plate 140. The rack 160 is fixed side-by-side on the support rod 150 vertically. The upper moving disc 210, the upper moving frame 220, and the lower moving frame 240 are movably sleeved on the outer periphery of the support rod 150 and the rack 160. The lower moving disc 250 is fixed to the bottom end of the support rod 150. The second motor 180 and the gear 170 are fixed to the top of the upper moving disc 210. The second motor 180 is connected to the gear 170, and the gear 170 meshes with the rack 160. The second motor 180 is used to drive the gear 170 to move along the rack 160, thereby driving the upper moving disc 210 to move closer to or away from the lower moving disc 250.

[0071] The support rod 150 is fixed between the movable plate 140 and the lower movable disc 250. As the second motor 180 drives the gear 170 to move along the rack 160, it drives the upper movable disc 210 and the lower movable frame 240 to move up and down, so as to achieve sliding cooperation with the lower movable frame 240 at the top and inside.

[0072] Specifically, support rod 150 is located at the bottom front end of movable plate 140, and its top is fixedly connected to movable plate 140. Rack 160 is located on one side of support rod 150 and is fixedly connected to it. Gear 170 is located on one side of rack 160, and meshes with rack 160 for transmission. Second motor 180 is located at the front end of gear 170, and its shaft is fixedly connected to gear 170. Tube-retrieving assembly 200 is located on the front side of transmission assembly 100, and transmission assembly 100 can control the movement of tube-retrieving assembly 200.

[0073] Reference Figure 5 as well as Figure 6 The upper movable disk 210 is located below the gear 170, and the upper moving frame 220 is located below the upper movable disk 210. The upper end of the upper moving frame 220 slides in cooperation with the upper radial groove 214.

[0074] The upper moving frame inclined surface 227 is located at the lower end of the main body of the upper moving frame 220, and the upper moving frame inclined surface 227 plays a pushing role. The lower moving frame 240 is located below the upper moving frame 220, and a corresponding lower moving frame 240 is set below each upper moving frame 220. A fourth magnet (not shown) is installed on the side of the lower moving frame 240 near the support rod 150. The fourth magnet on the lower moving frame 240 attracts the third magnet on the lower half of the support rod 150. The lower moving frame inclined surface 247 is located at the upper end of the main body of the lower moving frame 240, and the lower moving frame inclined surface 247 cooperates with the upper moving frame inclined surface 227. The lower moving disk 250 is located below the lower moving frame 240, and the lower moving disk 250 supports and limits the lower moving frame 240.

[0075] The lower movable disk 250 is provided with a second square hole 251, which is located in the middle of the main body of the lower movable disk 250 and is fixedly connected to the support rod 150.

[0076] In this embodiment, the transmission assembly 100 further includes a first electromagnet, a second magnet, a third magnet, and a fourth magnet fixed thereon; the first electromagnet is fixed to the upper half of the support rod 150 and can be energized in both directions, the second magnet is fixed to the upper moving frame 220, the first electromagnet is used to repel the second magnet so that the upper moving frame 220 moves away from the support rod 150, or the first electromagnet is used to attract the second magnet so that the upper moving frame 220 moves closer to the support rod 150; the third magnet fixes the lower half of the support rod 150, and the fourth magnet is fixed to the lower moving frame 240, the third magnet and the fourth magnet attract each other.

[0077] A T-shaped protrusion 221 is provided on the side of the upper moving frame 220 away from the magnet. A T-shaped groove 241 is provided on the side of the lower moving frame 240 near the support rod 150, and the T-shaped groove 241 slides in cooperation with the T-shaped protrusion 221. As the upper moving frame 220 moves downward, the T-shaped groove 241 gradually moves to be aligned vertically with the T-shaped protrusion 221. At this time, the upper moving frame 220 continues to move downward, allowing the T-shaped groove 241 and the T-shaped protrusion 221 to slide in cooperation until the bottom end of the upper moving frame 220 coincides with the lower radial groove 252.

[0078] A first electromagnet (not shown) is installed on the upper half of the support rod 150. The first electromagnet changes its magnetism when energized. A second magnet is installed on the upper frame 220. The upper half of the support rod 150 and the upper frame 220 attract or repel each other. A third magnet is installed on the lower half of the support rod 150, and a fourth magnet is installed on the lower frame 240. The fourth magnet on the lower frame 240 attracts the third magnet on the lower half of the support rod 150.

[0079] The second drive mechanism drives the upper moving disk 210 downward, driving the upper moving frame 220 to move away from the support rod 150. Then, the inclined plane pushes the lower moving frame 240 to move away from the support rod 150 until the upper moving frame 220 is inside the lower moving frame 240. Then, the magnetism of the first electromagnet in the upper half of the support rod 150 is adjusted to repel the upper moving frame 220 and drive it to continue moving away from the support rod 150, thereby driving the lower moving frame 240 to continue moving into the gap. After the cryopreservation tube 400 is clamped, the magnetism of the first electromagnet in the upper half of the support rod 150 is adjusted to attract the upper moving frame 220 and drive the lower moving frame 240 to move closer to the support rod 150. The first drive mechanism drives the upper moving frame 220 upward, and the attraction between the third magnet in the lower half of the support rod 150 and the fourth magnet in the lower moving frame 240 moves the lower moving frame 240 closer to the support rod 150 until the upper moving frame 220 is above the lower moving frame 240, completing the reset.

[0080] Reference Figure 7 , Figure 8 , Figure 10In this embodiment, a first sliding groove 223 is provided through the second placement groove 222 along its thickness; a fifth electromagnet 224, a sixth magnet 225, and a seventh electromagnet 226 are sequentially arranged in the first sliding groove 223 along its thickness direction, with the fifth electromagnet 224 and the seventh electromagnet 226 located on opposite sides of the second placement groove 222; a gripper 230 is slidably disposed in the first sliding groove 223 along the thickness direction of the second placement groove 222, and an eighth magnet 234 is provided on the outer wall of the gripper 230, the eighth magnet 234 and... The sixth magnet 225 attracts; the eighth magnet 234 is used to repel or attract the fifth electromagnet 224 so that the gripper 230 can reciprocate between the first slide groove 223 and the first placement groove 330 from one side of the fifth electromagnet 224 in the second placement groove 222; or the eighth magnet 234 is used to repel or attract the seventh electromagnet 226 so that the gripper 230 can reciprocate between the first slide groove 223 and the first placement groove 330 from one side of the seventh electromagnet 226 in the second placement groove 222.

[0081] The second placement slot 222 is located inside the main body of the upper moving frame 220, and the number of second placement slots 222 is determined according to the number of cryopreservation tubes 400. The first sliding groove 223 is located on the left and right sides inside the second placement slot 222, and the first sliding groove 223 is used for limiting movement. The fifth electromagnet 224 is located below the first sliding groove 223, and the fifth electromagnet 224 changes its magnetism when energized. The fifth electromagnet 224 is located on one side of the sixth magnet 225, and the seventh electromagnet 226 is located on the other side of the sixth magnet 225. The fifth electromagnet 224 and the seventh electromagnet 226 change their magnetism when energized.

[0082] The lower transfer frame 240 is provided with a T-shaped groove 241, a second placement groove 222, a first sliding groove 223, a fifth electromagnet 224, a sixth magnet 225, a seventh electromagnet 226, and a lower transfer frame inclined surface 247. The T-shaped groove 241 is located on one side of the lower transfer frame 240, and the T-shaped groove 241 slides in cooperation with the T-shaped protrusion 221. The second placement groove 222 is located inside the main body of the lower transfer frame 240, and the number of second placement grooves 222 is determined according to the number of cryopreservation tubes 400.

[0083] Reference Figure 9In this embodiment, the gripper 230 includes a first gripping part, a second gripping part, and a connector; a gripping space for gripping the cryopreservation tube 400 is formed between the first gripping part and the second gripping part; two gripping openings communicating with the gripping space are formed between the opposite side edges of the first gripping part and the second gripping part; each of the two gripping openings is provided with an elastic protrusion 232 so that the cryopreservation tube 400 can move into or out of the gripping space; an eighth magnet 234 is fixed to the back of the first gripping part or the second gripping part and can magnetically engage with the sixth magnet 225 on the first slide groove 223; the bottoms of the first gripping part and the second gripping part are fixed by the connector so that the first gripping part and the second gripping part can move synchronously.

[0084] Reference Figure 9 as well as Figure 10 The gripper 230 is mounted on the first slide groove 223 of the upper moving frame 220. The gripper 230 includes a gripping surface 231, a protruding plate 232, a limiting plate 233, and an eighth magnet 234. The gripping surface 231 is located in the middle of the main body of the gripper 230, and the gripping surface 231 is hollow and circular, limiting the cryopreservation tube 400. The protruding plate 232 is located at both ends of the gripping surface 231, and the protruding plate 232 is an opening of the gripping surface 231. The protruding plate 232 is made of rubber, allowing the cryopreservation tube 400 to enter the interior of the gripping surface 231 through the protruding plate 232. The limiting plate 233 is located on both sides of the gripping surface 231, and the limiting plate 233 slides in engagement with the first slide groove 223. The eighth magnet 234 is located in the middle of the limiting plate 233, and the eighth magnet 234 guides the movement of the gripper 230.

[0085] Reference Figure 12 In this embodiment, the first placement groove 330 is provided with a second sliding groove 340, a limiting circular groove 350, and a circular groove outlet 360. The second sliding groove 340 is arranged along the thickness direction of the first placement groove 330 and is used to slide and cooperate with the gripper 230. The limiting circular groove 350 is arranged at the bottom of the first placement groove 330 and is used to limit the bottom of the cryopreservation tube 400. The circular groove opening is opened on the side of the limiting circular groove 350. The circular groove outlet 360 is elastic and is used for the cryopreservation tube 400 to move into or out of the limiting circular groove 350.

[0086] The storage rack 300 is located below the transmission assembly 100 and is used to store cryogenic tubes 400. The storage rack 300 includes a long strip protrusion 310, storage blades 320, a first placement groove 330, a second sliding groove 340, a limiting circular groove 350, a groove outlet 360, and a partition 370. (Refer to...) Figure 13The elongated protrusion 310 is located in the middle of the main body of the storage rack 300. The elongated protrusion 310 cooperates with the upper axial groove 213 and the lower axial groove 253, so that the elongated protrusion 310 limits the upper moving disk 210 and the lower moving disk 250. The storage blades 320 are evenly distributed around the circumference of the main body of the storage rack 300. The number of storage blades 320 is the same as the number of upper moving racks 220 and lower moving racks 240. A gap is provided in the middle of each group of storage blades 320 to allow the upper moving racks 220 and lower moving racks 240 to pass through. The first placement groove 330 is located inside the storage blades 320. The number of first placement grooves 330 is determined according to the cryopreservation tube 400. The second slide groove 340 is located on the left and right sides inside the first placement groove 330, and the second slide groove 340 slides in cooperation with the limiting plate 233; the limiting circular groove 350 is located at the lower end of the first placement groove 330, and the limiting circular groove 350 limits the cryopreservation tube 400; the circular groove outlet 360 is located at the front end of the limiting circular groove 350, and the circular groove outlet 360 is made of rubber, so that the cryopreservation tube 400 can be released from the limiting circular groove 350 by squeezing the circular groove outlet 360; the partition 370 is located in the middle of the storage blade 320, and the partition 370 is used for limiting; the cryopreservation tube 400 is installed in the storage rack 300, and the number depends on the situation.

[0087] Reference Figure 13 The liquid nitrogen tank 500 is provided with an access port 510 and a limiting groove 520. The access port 510 is located in the middle of the main body of the liquid nitrogen tank 500. When the cryopreservation tube 400 is not removed, the downward moving disc 250 overlaps with the access port 510 and seals it. The limiting groove 520 is located at the upper end of the main body of the liquid nitrogen tank 500 and limits the support frame 130.

[0088] According to the embodiment of the liquid nitrogen tank retrieval device that can retrieve multiple tanks at a time, the working principle of the liquid nitrogen tank retrieval device that can retrieve multiple tanks at a time is as follows: the initial state is as follows: Figure 1As shown, at this time, the lower moving disk 250 overlaps and seals with the access port 510. The first electromagnet located on the upper half of the support rod 150 is energized in the positive direction, causing the second magnet on the upper moving frame 220 to attract the first electromagnet on the upper half of the support rod 150, thereby limiting the upper moving frame 220. The eighth magnet 234 on the gripper 230 is magnetically attracted to the sixth magnet 225, so the gripper 230 is limited on the upper moving frame 220 and the lower moving frame 240. When the cryopreservation tube 400 is to be removed, the first motor 110 is started. The first motor 110 drives the screw 120 to rotate. The rotation of the screw 120 causes the moving plate 140 to move downward. 140 drives the support rod 150 to move downwards, thus the entire tube assembly 200 moves downwards until the bottom end of the lower moving frame 240 coincides with the top end of the partition 370. The first motor 110 is then stopped, and the second motor 180 is started. The second motor 180 drives the gear 170 to rotate, and then the gear 170 meshes with the rack 160, causing the upper moving disc 210 and the upper moving frame 220 to move downwards. The inclined surface 227 of the upper moving frame presses against the inclined surface 247 of the lower moving frame, causing the lower moving frame 240 to resist the attraction generated by the fourth magnet and the third magnet on the support rod 150 and move outwards along the lower radial groove 252 and the partition 370. Figure 14 As shown; the first electromagnet on the support rod 150 remains positively energized, and the upper moving frame 220 moves downward, causing the T-shaped groove 241 to gradually move to align vertically with the T-shaped protrusion 221, as shown. Figure 18 As shown; at this time, the upper moving frame 220 continues to move downward, so that the T-shaped groove 241 and the T-shaped protrusion 221 slide together until the bottom end of the upper moving frame 220 coincides with the lower radial groove 252, as shown. Figure 18 As shown; then, the second motor 180 is stopped, and the first electromagnet on the support rod 150 is reverse-energized, causing the second magnet on the upper moving frame 220 to repel the first electromagnet on the support rod 150, thereby pushing the upper moving frame 220 outward along the upper radial groove 214 and the lower radial groove 252, and in turn pushing the lower moving frame 240 outward along the gap in the middle of the storage blade 320, until the lower moving frame 240 abuts against the inner wall of the liquid nitrogen tank 500, as shown. Figure 19 and 20 As shown; thus, the upper moving frame 220 and the lower moving frame 240 are positioned between adjacent storage blades 320 and aligned parallel to each other. If a cryopreservation tube 400 within the storage rack 300 is to be retrieved, the fifth electromagnet 224 or the seventh electromagnet 226 on the upper moving frame 220 or the lower moving frame 240, corresponding to the cryopreservation tube 400, is energized. This causes the fifth electromagnet 224 or the seventh electromagnet 226 to generate a repulsive force with the eighth magnet 234, causing the gripper 230 to move along the second slide groove 340 towards the cryopreservation tube 400, pressing against the protrusion 232 at the cryopreservation tube 400. Figure 21As shown; this causes the cryopreservation tube 400 to enter the clamping surface 231. Then, the fifth electromagnet 224 is de-energized, and the sixth magnet 225 and the eighth magnet 234 attract each other, causing the gripper 230 to carry the cryopreservation tube 400 back to its initial position, overcoming the resistance of the circular groove outlet 360. Figure 22 As shown; at this time, the cryopreservation tube 400 has been transferred to the upper transfer rack 220 or the lower transfer rack 240. If it is the storage blade 320 on the other side, then the seventh electromagnet 226 is de-energized to transfer the cryopreservation tube 400. When all the cryopreservation tubes 400 to be retrieved have been transferred to the upper transfer rack 220 and the lower transfer rack 240, the first electromagnet located on the support rod 150 is energized in the forward direction, so that the magnet on the upper transfer rack 220 and the electromagnet on the support rod 150 generate an attraction, thereby causing the upper transfer rack 220 to move inward with the lower transfer rack 240, returning to the original position. Figure 15 The state is as follows: Next, the second motor 180 is started, causing the upper moving frame 220 to gradually move upwards. Due to the attraction between the fourth magnet on the support rod 150 and the third magnet on the support rod 150, the lower moving frame 240 moves towards the support rod 150 following the upward movement of the upper moving frame 220. Figure 14 As shown; then the first motor 110 is started, causing the entire tube-taking assembly 200 to move upwards, eventually returning to its original position. Figure 1 The entire process is complete, and cryopreservation tube 400 has been successfully retrieved.

[0089] The liquid nitrogen tank storage and retrieval device provided in this embodiment, which allows for the retrieval of multiple tanks at a time, has at least the following advantages:

[0090] By lowering and unfolding the tube retrieval assembly 200, it enters the storage rack 300. The moving rack quickly unfolds within the storage rack 300. The tube retrieval assembly 200 and the storage rack 300 work together to precisely transfer the cryopreservation tubes 400, eliminating the need for manual tube removal and significantly improving efficiency due to the short operation time. Only the cryopreservation tubes 400 that need to be removed are transferred, ensuring that the remaining cryopreservation tubes 400 do not need to be exposed to room temperature, thus preventing the biological samples from becoming inactivated. Through the coordinated operation of the tube retrieval assembly 200, the storage rack 300, and the cryopreservation tubes 400, the problems of dangerous manual handling, low efficiency, and easy inactivation of biological samples in existing liquid nitrogen tank 500 storage and retrieval equipment are solved.

[0091] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for storing and retrieving multiple liquid nitrogen tanks at a time, characterized in that, include: Storage rack (300) and liquid nitrogen tank (500), wherein the storage rack (300) is fixed inside the liquid nitrogen tank (500), and the storage rack (300) is provided with a plurality of first placement slots (330), the first placement slots (330) being used to place cryopreservation tubes (400). The tube-retrieving assembly (200) includes a movable frame and multiple grippers (230); the movable frame can be unfolded or folded, and the movable frame is provided with multiple second placement slots (222); the multiple grippers (230) correspond one-to-one with the multiple second placement slots (222) and are magnetically assembled together; And a transmission assembly (100), which is disposed on the liquid nitrogen tank (500), the transmission assembly (100) is connected to the movable frame, and the transmission assembly (100) is used to drive the movable frame to move so that the movable frame moves into the storage rack (300) and unfolds, or moves out of the storage rack (300) and converges; Each of the second placement slots (222) is used to correspond to the first placement slot (330) when the mobile frame is deployed; the gripper (230) in each of the second placement slots (222) is used to leave the second placement slot (222) under magnetic repulsion to enter the first placement slot (330) and grip the cryopreservation tube (400), or the gripper (230) is used to reset under magnetic attraction to move the gripped cryopreservation tube (400) into the second placement slot (222); The movable frame includes an upper movable disc (210), a lower movable disc (250), an upper movable frame (220), and a lower movable frame (240); both the upper movable frame (220) and the lower movable frame (240) are vertically arranged. The top end of the upper movable frame (220) is slidably connected to the upper movable disc (210), and the bottom end of the lower movable frame (240) is slidably connected to the lower movable disc (250). When the movable frame is in the unfolded state, the outer side of the upper movable frame (220) It can slide and engage with the inner side of the lower moving frame (240) so that the upper moving frame (220) and the lower moving frame (240) can be unfolded side by side; when the moving frame is in the converged state, the bottom end of the upper moving frame (220) can slide and engage with the top end of the lower moving frame (240) so that the upper moving frame (220) and the lower moving frame (240) overlap and converge; both the upper moving frame (220) and the lower moving frame (240) are provided with a plurality of second placement slots (222). The transmission assembly (100) is connected to both the upper moving disk (210) and the lower moving disk (250). The transmission assembly (100) is used to drive the upper moving disk (210) and the lower moving disk (250) to move closer to or further away from each other, so that the upper moving frame (220) and the lower moving frame (240) can switch between the unfolded state and the gathered state.

2. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to claim 1, characterized in that: The storage rack (300) includes a plurality of storage blades (320), which are arranged in a hollow columnar structure. Each storage blade (320) has a gap that opens toward the hollow position. Each storage blade (320) has a plurality of first placement slots (330) on both sides of the gap. There are multiple upper moving frames (220) and multiple lower moving frames (240). The multiple upper moving frames (220) and multiple lower moving frames (240) are arranged around the center line connecting the upper moving disk (210) and the lower moving disk (250). The top ends of the multiple upper moving frames (220) are slidably connected to the upper moving disk (210) along the radial direction. The bottom ends of the multiple lower moving frames (240) are slidably connected to the lower moving disk (250) along the radial direction. Each upper moving frame (220) has an upper moving frame inclined surface (227) at its bottom end. Each lower moving frame (240) has a lower moving frame inclined surface (247) at its top end. The upper moving frame inclined surface (227) and the lower moving frame inclined surface (247) are slidably engaged. The transmission assembly (100) is used to drive the upper moving frame (220) and the lower moving frame (240) to extend into the gap in the unfolded state, so that the second placement slot (222) corresponds to the position of the first placement slot (330); or the transmission assembly (100) is used to drive the upper moving frame (220) and the lower moving frame (240) to leave the liquid nitrogen tank (500) in the converged state.

3. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to claim 2, characterized in that: The transmission assembly (100) includes a first drive mechanism and a second drive mechanism; the first drive mechanism is disposed on the liquid nitrogen tank (500), and the first drive mechanism is connected to the second drive mechanism. The first drive mechanism is used to drive the first drive mechanism, the upper moving disk (210), the lower moving disk (250), the upper moving frame (220), and the lower moving frame (240) to move synchronously into or out of the storage rack (300); the second drive mechanism is connected to the upper moving disk (210) and the lower moving disk (250), and the second drive mechanism is used to drive the upper moving disk (210) and the lower moving disk (250) to move closer to or further away from each other, so that the upper moving frame (220) and the lower moving frame (240) unfold or converge.

4. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to claim 3, characterized in that: The first driving mechanism includes a first motor (110), a screw (120), a support frame (130), and a moving plate (140); the support frame (130) is fixed on the liquid nitrogen tank (500), the screw (120) is rotatably disposed in the support frame (130) in the vertical direction, the moving plate (140) is slidably disposed in the support frame (130) in the vertical direction, and the moving plate (140) is threadedly connected to the screw (120), and the moving frame is connected to the moving plate (140); the first motor (110) is fixed on the support frame (130), and the first motor (110) is connected to the screw (120); the first motor (110) is used to drive the screw (120) to rotate, so as to drive the moving plate (140) and the moving frame to reciprocate in the vertical direction, so as to move into or out of the storage rack (300).

5. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to claim 4, characterized in that: The second drive mechanism includes a support rod (150), a rack (160), a gear (170), and a second motor (180); the top end of the support rod (150) is fixed to the moving plate (140), and the rack (160) is fixed side by side on the support rod (150) in the vertical direction; the upper moving disc (210), the upper moving frame (220), and the lower moving frame (240) are movably sleeved on the outer periphery of the support rod (150) and the rack (160), and the lower moving disc (210) is movably sleeved on the outer periphery of the support rod (150) and the rack (160), and the lower moving disc (210) is movably sleeved on the outer periphery of the rack (160). 50) is fixed to the bottom end of the support rod (150); the second motor (180) and the gear (170) are fixed to the top of the upper moving disk (210), the second motor (180) is connected to the gear (170), the gear (170) meshes with the rack (160), and the second motor (180) is used to drive the gear (170) to move along the rack (160) to drive the upper moving disk (210) to move closer to or away from the lower moving disk (250).

6. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to claim 5, characterized in that: The transmission assembly (100) further includes a first electromagnet, a second magnet, a third magnet, and a fourth magnet; the first electromagnet is fixed to the upper half of the support rod (150) and can be energized in both directions, the second magnet is fixed to the upper moving frame (220), the first electromagnet is used to repel the second magnet so that the upper moving frame (220) moves away from the support rod (150), or the first electromagnet is used to attract the second magnet so that the upper moving frame (220) moves closer to the support rod (150); the third magnet is fixed to the lower half of the support rod (150), the fourth magnet is fixed to the lower moving frame (240), and the third magnet and the fourth magnet attract each other.

7. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to any one of claims 1-6, characterized in that: A first sliding groove (223) is provided through the second placement groove (222) along its thickness; a fifth electromagnet (224), a sixth magnet (225), and a seventh electromagnet (226) are sequentially arranged in the first sliding groove (223) along its thickness direction, the fifth electromagnet (224) and the seventh electromagnet (226) being located on opposite sides of the second placement groove (222); the gripper (230) is slidably disposed in the first sliding groove (223) along the thickness direction of the second placement groove (222), and an eighth magnet (234) is provided on the outer wall of the gripper (230), the eighth magnet (234) and the sixth magnet (225) being connected. 25) Attraction; the eighth magnet (234) is used to repel or attract the fifth electromagnet (224) so ​​that the gripper (230) can reciprocate between the first slide (223) and the first placement slot (330) from one side of the fifth electromagnet (224) in the second placement slot (222); or the eighth magnet (234) is used to repel or attract the seventh electromagnet (226) so that the gripper (230) can reciprocate between the first slide (223) and the first placement slot (330) from one side of the seventh electromagnet (226) in the second placement slot (222).

8. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to claim 7, characterized in that: The gripper (230) includes a first gripping part, a second gripping part, and a connector; a gripping space for gripping the cryopreservation tube (400) is formed between the first gripping part and the second gripping part; two gripping openings communicating with the gripping space are formed between the opposite side edges of the first gripping part and the second gripping part; each of the two gripping openings is provided with an elastic protrusion (232) so that the cryopreservation tube (400) can move into or out of the gripping space; the eighth magnet (234) is fixed on the back of the first gripping part or the second gripping part and can magnetically cooperate with the sixth magnet (225) on the first slide groove (223); the bottoms of the first gripping part and the second gripping part are fixed by the connector so that the first gripping part and the second gripping part can move synchronously.

9. The liquid nitrogen tank storage and retrieval device for retrieving multiple tanks at a time according to any one of claims 1-6, characterized in that: The first placement groove (330) is provided with a second sliding groove (340), a limiting circular groove (350) and a circular groove outlet (360). The second sliding groove (340) is arranged along the thickness direction of the first placement groove (330) and is used to slide and cooperate with the gripper (230). The limiting circular groove (350) is arranged at the bottom of the first placement groove (330) and is used to limit the bottom of the cryopreservation tube (400). The opening of the circular groove is opened on the side of the limiting circular groove (350). The circular groove outlet (360) is elastic and is used for the cryopreservation tube (400) to move into or out of the limiting circular groove (350).

Images