Liquid nitrogen storage equipment

Abstract

The utility model relates to the technical field of medical equipment, and particularly discloses liquid nitrogen storage equipment which comprises a bearing frame, a transmission mechanism, a storing and taking mechanism, a lifting mechanism, a telescopic driving mechanism and a rotating mechanism, the bearing frame is arranged on a liquid nitrogen tank, the lifting mechanism and the telescopic driving mechanism are both arranged on the bearing frame, and the rotating mechanism is arranged on a cover plug; the transmission mechanism comprises a transmission carrier plate and a transmission assembly arranged on the transmission carrier plate. The storing and taking mechanism is arranged at the driving end of the transmission assembly and located in the liquid nitrogen tank. The driving end of the lifting mechanism is connected with the transmission carrier plate; the driving end of the telescopic driving mechanism is in transmission connection with the transmission assembly; the driving end of the rotating mechanism is connected with the transmission assembly. According to the liquid nitrogen storage device, the cryopreservation boxes can be directly stored and taken out, the storage frame does not need to be moved, therefore, balance in the liquid nitrogen tank cannot be disturbed, the uniformity of the temperature in the liquid nitrogen tank is improved, liquid nitrogen consumption in the liquid nitrogen tank is reduced, and meanwhile sample damage caused by the fact that other cryopreservation boxes are affected when the storage frame is moved is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a liquid nitrogen storage device. Background Art

[0002] At present, in order to maintain the activity of biological molecules and cells in biological samples during long-term storage, the temperature needs to be as low as possible to reduce the biochemical reactions in the samples and improve the stability of various components in the samples. Therefore, the storage temperature of long-term samples is required to reach -86°C, -150°C or even -196°C; at the same time, the stability and uniformity of temperature during long-term storage will also affect the quality of the samples. The most mature preservation solution on the market is to store in liquid nitrogen tanks, with storage racks set up in the liquid nitrogen tanks, and cryopreservation boxes for storing samples placed on the storage racks.

[0003] At present, there are two ways to take out the cryobox from the liquid nitrogen tank: the first is to manually lift out the storage rack through a lifting rod, and then select the cryobox or sample from it; the second is to lift out the storage rack through a lifting mechanism, and then take out the cryobox through a box taking mechanism. Both of the above methods require moving the storage rack, which will disrupt the balance in the liquid nitrogen tank, making the temperature in the liquid nitrogen tank uneven and increasing the consumption of liquid nitrogen in the liquid nitrogen tank. At the same time, moving the storage rack will also affect other cryoboxes on the storage rack, which may cause the sample to be damaged. Utility Model Content

[0004] The utility model aims to provide a liquid nitrogen storage device to solve the problem in the prior art that it is necessary to move a storage rack when taking out a cryobox, thereby disturbing the balance in the liquid nitrogen tank, making the temperature in the liquid nitrogen tank uneven, and increasing the consumption of liquid nitrogen in the liquid nitrogen tank. At the same time, moving the storage rack will also affect other cryoboxes on the storage rack, so that the sample is at risk of being damaged.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a liquid nitrogen storage device, comprising a liquid nitrogen tank, a cover plug and a storage rack, wherein the cover plug is embedded in the opening of the liquid nitrogen tank, the storage rack is arranged in the liquid nitrogen tank, and a freezing box is placed on the storage rack, and the liquid nitrogen storage device also includes:

[0007] A carrier frame, arranged on the liquid nitrogen tank;

[0008] A transmission mechanism, comprising a transmission carrier and a transmission assembly disposed on the transmission carrier, wherein the transmission carrier is movably disposed on the carrier frame in a vertical direction, and the transmission assembly can be inserted into the liquid nitrogen tank via the cover plug;

[0009] A storage and retrieval mechanism, provided at the driving end of the transmission assembly and located in the liquid nitrogen tank;

[0010] A lifting mechanism is provided on the carrier frame, wherein a driving end of the lifting mechanism is connected to the transmission carrier plate and is used to drive the transmission carrier plate to move along the vertical direction;

[0011] A telescopic driving mechanism is arranged on the carrier frame, wherein a driving end of the telescopic driving mechanism is connected to the transmission assembly for driving the transmission assembly to drive the access mechanism so that the access mechanism is extended and retracted in a horizontal direction to access the frozen storage box;

[0012] The rotating mechanism is arranged on the cover plug, and the driving end of the rotating mechanism is connected to the transmission assembly to drive the transmission assembly to rotate.

[0013] As an optional solution of the above-mentioned liquid nitrogen storage device, the transmission assembly includes:

[0014] A transmission housing, one end of which is rotatably connected to the transmission carrier plate, the other end of which is connected to the access mechanism, and the driving end of the rotating mechanism is connected to the transmission housing;

[0015] A transmission shaft is rotatably disposed in the transmission housing, and two ends of the transmission shaft are respectively transmission-connected to the driving end of the telescopic driving mechanism and the access mechanism.

[0016] As an optional solution of the above-mentioned liquid nitrogen storage device, the storage and access mechanism includes:

[0017] A storage and access carrier plate, the storage and access carrier plate being connected to the transmission housing;

[0018] A moving platform, the moving platform is slidably arranged on the access carrier along the horizontal direction; the moving platform is provided with a first rack, and the end of the transmission shaft is meshedly connected to the first rack, so as to drive the moving platform to move along the horizontal direction;

[0019] A shovel tray is arranged on the movable platform and is used for storing and accessing the frozen storage box.

[0020] As an optional solution for the above-mentioned liquid nitrogen storage device, the shovel plate is slidably arranged on the mobile platform along the horizontal direction; the access mechanism also includes a driven component, the access carrier is provided with a second rack, and the second rack is transmission-connected to the shovel plate through the driven component, and when the mobile platform moves relative to the access carrier, the second rack can drive the shovel plate to move along the horizontal direction.

[0021] As an optional solution of the above-mentioned liquid nitrogen storage device, the storage and access mechanism also includes a distance sensor, and the distance sensor is arranged on the shovel plate.

[0022] As an optional solution of the above-mentioned liquid nitrogen storage device, the rotating mechanism includes:

[0023] A rotating gear, the rotating gear is rotatably arranged on the cover plug and is coaxially sleeved outside the transmission housing; a driving bearing is arranged on the rotating gear, the transmission housing is provided with a bearing groove along the vertical direction, and the driving bearing is rollingly arranged in the bearing groove along the vertical direction;

[0024] A rotary drive motor is disposed on the cover plug, and a driving end of the rotary drive motor is connected to the rotary gear to drive the rotary gear to rotate.

[0025] As an optional solution of the above-mentioned liquid nitrogen storage device, a plurality of the driving bearings and the bearing grooves are provided, and the plurality of driving bearings and the plurality of bearing grooves are provided in one-to-one correspondence.

[0026] As an optional solution of the above-mentioned liquid nitrogen storage device, the telescopic drive mechanism includes:

[0027] A sprocket chain assembly, the sprocket chain assembly comprising a rod shaft, a transmission sprocket and a transmission chain, the rod shaft is rotatably arranged on the carrier, the transmission sprocket is arranged on the rod shaft, and the transmission sprocket is connected to the transmission shaft through the transmission chain;

[0028] A telescopic drive motor is disposed on the carrier frame, and a driving end of the telescopic drive motor is transmission-connected to the rod shaft for driving the rod shaft to rotate.

[0029] As an optional solution of the above-mentioned liquid nitrogen storage device, the lifting mechanism includes:

[0030] A ball screw assembly, the ball screw assembly comprising a screw and a nut disposed on the screw, the screw is rotatably disposed on the carrier, and the nut is connected to the transmission carrier plate;

[0031] A lifting drive motor is provided on the supporting frame, and a driving end of the lifting drive motor is drivingly connected to the screw rod to drive the screw rod to rotate.

[0032] As an optional solution of the above-mentioned liquid nitrogen storage device, the cover plug is movably arranged on the supporting frame along the vertical direction.

[0033] The beneficial effects of the utility model are:

[0034] The liquid nitrogen storage device includes a carrier, a transmission mechanism, a storage and retrieval mechanism, a lifting mechanism, a telescopic driving mechanism and a rotating mechanism. The carrier is arranged on the liquid nitrogen tank, the lifting mechanism and the telescopic driving mechanism are both arranged on the carrier, and the rotating mechanism is arranged on the cover plug. The transmission mechanism includes a transmission carrier and a transmission assembly arranged on the transmission carrier, the transmission carrier is movably arranged on the carrier in the vertical direction, the transmission assembly can be inserted into the liquid nitrogen tank through the cover plug, and the storage and retrieval mechanism is arranged at the driving end of the transmission assembly, which is located in the liquid nitrogen tank, so that the adjustment of the height of the transmission carrier is the adjustment of the height of the storage and retrieval mechanism, wherein the driving end of the lifting mechanism is connected to the transmission carrier, and is used to drive the transmission carrier to move in the vertical direction, so that the storage and retrieval mechanism can be automated when adjusting its height. At the same time, the driving end of the telescopic driving mechanism is connected to the transmission assembly, and is used to drive the transmission assembly to drive the storage and retrieval mechanism, so that the storage and retrieval mechanism can be telescoped in the horizontal direction to access the cryopreservation box, so as to realize the automation of the storage and retrieval mechanism when accessing the cryopreservation box. At the same time, the driving end of the rotating mechanism is connected to the transmission component, which is used to drive the transmission component to rotate, so that the transmission component can drive the access mechanism to rotate, thereby adjusting the telescopic direction of the access mechanism. In the liquid nitrogen storage device, the height of the access mechanism can be adjusted by the lifting mechanism, the telescopic direction of the access mechanism can be adjusted by the rotating mechanism, and the access mechanism can be telescoped to access the cryopreservation box by the telescopic driving mechanism, so that the liquid nitrogen storage device can directly access the cryopreservation box without moving the storage rack, so it will not disturb the balance in the liquid nitrogen tank, improve the uniformity of the temperature in the liquid nitrogen tank, reduce the liquid nitrogen consumption in the liquid nitrogen tank, and avoid the damage to the samples caused by the impact on other cryopreservation boxes when moving the storage rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a liquid nitrogen storage device provided in an embodiment of the utility model;

[0036] Figure 2 A cross-sectional view of a liquid nitrogen storage device provided by an embodiment of the utility model;

[0037] Figure 3 A partial structural schematic diagram of a liquid nitrogen storage device provided in an embodiment of the utility model;

[0038] Figure 4 A partial cross-sectional view of a liquid nitrogen storage device provided by an embodiment of the utility model;

[0039] Figure 5 A schematic diagram of the structure of the storage and access mechanism provided in an embodiment of the utility model.

[0040] In the figure:

[0041] 1. Carrying frame; 2. Transmission mechanism; 21. Transmission carrier plate; 22. Transmission assembly; 221. Transmission housing; 2211. Bearing groove; 222. Transmission shaft; 3. Access mechanism; 31. Access carrier plate; 311. Second rack; 32. Moving platform; 321. First rack; 33. Shovel plate; 34. Driven assembly; 4. Lifting mechanism; 41. Ball screw assembly; 411. Screw; 412. Nut; 42. Lifting drive motor; 5. Telescopic drive mechanism; 51. Sprocket chain assembly; 511. Rod shaft; 512. Transmission sprocket; 513. Transmission chain; 52. Telescopic drive motor; 6. Rotating mechanism; 61. Rotating gear; 611. Drive bearing; 62. Rotating drive motor; 7. Liquid nitrogen tank; 8. Cover plug; 9. Storage rack. DETAILED DESCRIPTION

[0042] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] This embodiment provides a liquid nitrogen storage device, including a liquid nitrogen tank 7, a plug 8 and a storage rack 9. The plug 8 is embedded in the opening of the liquid nitrogen tank 7. The storage rack 9 is arranged in the liquid nitrogen tank 7, and a freezing box is placed on the storage rack 9. The freezing box stores samples.

[0047] like Figure 1 to Figure 5 As shown, the liquid nitrogen storage device includes a carrier 1, a transmission mechanism 2, a storage and retrieval mechanism 3, a lifting mechanism 4, a telescopic driving mechanism 5 and a rotating mechanism 6. The carrier 1 is arranged on the liquid nitrogen tank 7, the lifting mechanism 4 and the telescopic driving mechanism 5 are both arranged on the carrier 1, and the rotating mechanism 6 is arranged on the plug 8. The transmission mechanism 2 includes a transmission carrier plate 21 and a transmission assembly 22 arranged on the transmission carrier plate 21. The transmission carrier plate 21 is movably arranged on the carrier 1 in the vertical direction. The transmission assembly 22 can be inserted into the liquid nitrogen tank 7 via the plug 8. The storage and retrieval mechanism 3 is arranged at the driving end of the transmission assembly 22, which is located in the liquid nitrogen tank 7, so that the adjustment of the height of the transmission carrier plate 21 is the adjustment of the height of the storage and retrieval mechanism 3, wherein the driving end of the lifting mechanism 4 is connected to the transmission carrier plate 21, and is used to drive the transmission carrier plate 21 to move in the vertical direction, so that the automation of the storage and retrieval mechanism 3 during height adjustment can be realized.

[0048] At the same time, the driving end of the telescopic driving mechanism 5 is connected to the transmission assembly 22 for driving the transmission assembly 22 to drive the access mechanism 3, so that the access mechanism 3 is extended and retracted in the horizontal direction to access the frozen storage box, thereby realizing the automation of the access mechanism 3 when accessing the frozen storage box. At the same time, the driving end of the rotating mechanism 6 is connected to the transmission assembly 22 for driving the transmission assembly 22 to rotate, so that the transmission assembly 22 can drive the access mechanism 3 to rotate, thereby adjusting the telescopic direction of the access mechanism 3.

[0049] In the liquid nitrogen storage device, the height of the access mechanism 3 can be adjusted by the lifting mechanism 4, the telescopic direction of the access mechanism 3 can be adjusted by the rotating mechanism 6, and the access mechanism 3 can be telescoped to access the cryoboxes by the telescopic driving mechanism 5, so that the liquid nitrogen storage device can directly access the cryoboxes without moving the storage rack 9, so it will not disturb the balance in the liquid nitrogen tank 7, improve the uniformity of the temperature in the liquid nitrogen tank 7, reduce the liquid nitrogen consumption in the liquid nitrogen tank 7, and also avoid the damage to the samples caused by the impact on other cryoboxes when moving the storage rack 9.

[0050] Furthermore, the plug 8 is movably arranged on the carrier 1 in the vertical direction, so that the plug 8 can be pulled out from the liquid nitrogen tank 7 to facilitate the storage and access of the cryopreservation box, and the plug 8 can also be positioned to facilitate the plug 8 to be inserted into the opening of the liquid nitrogen tank 7. Specifically, a slide rail is provided on the carrier 1, and the plug 8 is slidably arranged on the slide rail through a pulley. In the liquid nitrogen storage device, the transmission mechanism 2, the access mechanism 3, the lifting mechanism 4, the telescopic drive mechanism 5 and the rotating mechanism 6 are all separated from the liquid nitrogen tank 7 and are independent of each other, so that after the plug 8, the telescopic drive mechanism 5 and the access mechanism 3 are extended from the opening of the liquid nitrogen tank 7, the liquid nitrogen tank 7 can be conveniently transferred alone in an emergency, and the liquid nitrogen storage device does not need to dismantle the automation mechanism, and the storage rack 9 can be manually lifted out after the carrier 1 is separated from the liquid nitrogen tank 7.

[0051] like Figure 3 and Figure 4 As shown, the transmission assembly 22 includes a transmission housing 221 and a transmission shaft 222. One end of the transmission housing 221 is rotatably connected to the transmission carrier 21, and the other end of the transmission housing 221 is connected to the access mechanism 3, and the driving end of the rotating mechanism 6 is connected to the transmission housing 221, so that the rotating mechanism 6 can drive the transmission housing 221 to rotate, and drive the access mechanism 3 to rotate through the transmission housing 221, so as to adjust the telescopic direction of the access mechanism 3, and at the same time, the transmission shaft 222 is rotatably arranged in the transmission housing 221, and the two ends of the transmission shaft 222 are respectively connected to the driving end of the telescopic driving mechanism 5 and the access mechanism 3, so that the telescopic driving mechanism 5 can drive the transmission shaft 222 inside the transmission housing 221 to rotate to drive the access mechanism 3 to telescope, so as to realize the telescopic access mechanism 3 to access the frozen storage box, wherein the transmission housing 221 and the transmission shaft 222 do not affect each other, so that the access mechanism 3 can rotate alone or telescope alone or rotate and telescope at the same time.

[0052] like Figure 5As shown, the access mechanism 3 includes an access carrier 31, a moving platform 32 and a shovel plate 33. The access carrier 31 is connected to the transmission housing 221, so that the transmission housing 221 can drive the access carrier 31 to rotate when rotating. The moving platform 32 is slidably arranged on the access carrier 31 in the horizontal direction, and the moving platform 32 is provided with a first rack 321. The end of the transmission shaft 222 is meshed and connected to the first rack 321, which is used to drive the moving platform 32 to move in the horizontal direction, so that when the transmission shaft 222 rotates, it can drive the first rack 321 to drive the moving platform 32 to move. At the same time, the shovel plate 33 is arranged on the moving platform 32, and the shovel plate 33 is used to access the frozen box, and then the moving platform 32 can drive the shovel plate 33 to move during the movement, so as to realize the access of the frozen box by the shovel plate 33. Specifically, a gear is arranged at the end of the transmission shaft 222 close to the access carrier 31, and the gear is meshed with the first rack 321. Optionally, the storage and access mechanism 3 also includes a distance sensor, which is arranged on the shovel plate 33, so that the distance sensor can sense the distance between the cryobox and the shovel plate 33 to facilitate the storage and access of the cryobox and avoid the shovel plate 33 affecting the cryobox during movement, thereby preventing the sample from being damaged.

[0053] Furthermore, the shovel plate 33 is slidably arranged on the movable platform 32 in the horizontal direction, the access mechanism 3 also includes a driven component 34, the access carrier 31 is provided with a second rack 311, and the second rack 311 is connected to the shovel plate 33 through the driven component 34. When the movable platform 32 moves relative to the access carrier 31, the second rack 311 can drive the shovel plate 33 to move in the horizontal direction, thereby further increasing the moving distance of the shovel plate 33 and reducing the difficulty of accessing the frozen storage box. Specifically, the driven assembly 34 includes a driven member and a driven chain. The driven member is rotatably arranged on the moving platform 32. The upper end of the driven member is meshed and connected to the second rack 311, and the lower end of the driven member is meshed and connected to the driven chain. The driven chain is connected to the shovel plate 33 through a joint. Therefore, when the moving platform 32 moves relative to the access carrier 31, the second rack 311 can drive the driven member to rotate, so that the driven member drives the driven chain to move, and then the shovel plate 33 moves relative to the moving platform 32.

[0054] like Figure 3 and Figure 4As shown, the rotating mechanism 6 includes a rotating gear 61 and a rotating drive motor 62. The rotating gear 61 is rotatably arranged on the cover plug 8, and is coaxially sleeved outside the transmission housing 221. A driving bearing 611 is arranged on the rotating gear 61. The transmission housing 221 is provided with a bearing groove 2211 in the vertical direction. The driving bearing 611 is arranged in the bearing groove 2211 in a rolling manner in the vertical direction. When the rotating gear 61 rotates, the rotating gear 61 can drive the driving bearing 611 to rotate, so that the driving bearing 611 can drive the transmission housing 221 to rotate, thereby realizing the rotation of the access mechanism 3, and the driving bearing 611 is arranged in the bearing groove 2211 in a rolling manner in the vertical direction, and the transmission housing 221 is also limited to facilitate the lifting and lowering of the transmission housing 221. At the same time, the rotating drive motor 62 is arranged on the cover plug 8, and the driving end of the rotating drive motor 62 is connected to the rotating gear 61, which is used to drive the rotating gear 61 to rotate, thereby realizing the automation of the rotation of the access mechanism 3. Optionally, multiple drive bearings 611 and bearing grooves 2211 are provided, and the multiple drive bearings 611 and the multiple bearing grooves 2211 are provided in one-to-one correspondence. The provision of multiple drive bearings 611 and the multiple bearing grooves 2211 can reduce the difficulty of rotating the transmission housing 221.

[0055] Further, the telescopic drive mechanism 5 includes a sprocket chain assembly 51 and a telescopic drive motor 52. The sprocket chain assembly 51 includes a rod shaft 511, a transmission sprocket 512 and a transmission chain 513, the rod shaft 511 is rotatably arranged on the carrier 1, the transmission sprocket 512 is arranged on the rod shaft 511, the transmission sprocket 512 is connected to the transmission shaft 222 through the transmission chain 513, and the telescopic drive motor 52 is arranged on the carrier 1, and the driving end of the telescopic drive motor 52 is connected to the rod shaft 511 for driving the rod shaft 511 to rotate, so that after the telescopic drive motor 52 drives the rod shaft 511 to rotate, the rod shaft 511 sequentially rotates the transmission shaft 222 through the transmission sprocket 512 and the transmission chain 513, thereby realizing the automation of the storage and retrieval mechanism 3 when telescoping. Specifically, the telescopic drive motor 52 is connected to the rod shaft 511 through a synchronous belt drive, and a sprocket is provided at the upper end of the transmission shaft 222, and the sprocket is meshingly connected to the transmission chain 513. At the same time, the transmission sprocket 512 is rotatably arranged on the transmission carrier 21, and the transmission sprocket 512 is movably arranged on the rod shaft 511 in the vertical direction, so that when the transmission carrier 21 drives the transmission housing 221 to rise and fall, the transmission sprocket 512 and the transmission chain 513 can follow the movement.

[0056] Furthermore, the lifting mechanism 4 includes a ball screw assembly 41 and a lifting drive motor 42. The ball screw assembly 41 includes a screw 411 and a nut 412 arranged on the screw 411, the screw 411 is rotatably arranged on the support frame 1, the nut 412 is connected to the transmission carrier 21, and the lifting drive motor 42 is arranged on the support frame 1, and the driving end of the lifting drive motor 42 is connected to the screw 411 for driving the screw 411 to rotate, so that after the lifting drive motor 42 drives the screw 411 to rotate, the nut 412 on the screw 411 can drive the transmission carrier 21 to lift and lower, thereby realizing the automation of the access mechanism 3 during lifting and lowering. Specifically, the lifting drive motor 42 is connected to the screw 411 through a synchronous belt drive.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A liquid nitrogen storage device, comprising a liquid nitrogen tank (7), a cover plug (8) and a storage rack (9), wherein the cover plug (8) is embedded in the opening of the liquid nitrogen tank (7), the storage rack (9) is arranged in the liquid nitrogen tank (7), and a freezing box is placed on the storage rack (9), characterized in that: The liquid nitrogen storage device also includes: A carrier frame (1) is arranged on the liquid nitrogen tank (7); A transmission mechanism (2), comprising a transmission carrier plate (21) and a transmission assembly (22) arranged on the transmission carrier plate (21), wherein the transmission carrier plate (21) is movably arranged on the carrier frame (1) in a vertical direction, and the transmission assembly (22) can be inserted into the liquid nitrogen tank (7) via the cover plug (8); A storage and retrieval mechanism (3) is arranged at the driving end of the transmission assembly (22) and is located inside the liquid nitrogen tank (7); A lifting mechanism (4) is arranged on the carrier frame (1), and a driving end of the lifting mechanism (4) is connected to the transmission carrier plate (21) and is used to drive the transmission carrier plate (21) to move along the vertical direction; A telescopic drive mechanism (5) is arranged on the carrier (1), and a driving end of the telescopic drive mechanism (5) is drivingly connected to the transmission assembly (22) and is used to drive the transmission assembly (22) to drive the access mechanism (3), so that the access mechanism (3) is telescopically extended in a horizontal direction to access the frozen storage box; The rotating mechanism (6) is arranged on the cover plug (8), and the driving end of the rotating mechanism (6) is connected to the transmission assembly (22) for driving the transmission assembly (22) to rotate.

2. The liquid nitrogen storage device according to claim 1, characterized in that: The transmission assembly (22) comprises: A transmission housing (221), one end of the transmission housing (221) being rotatably connected to the transmission carrier plate (21), the other end of the transmission housing (221) being connected to the access mechanism (3), and the driving end of the rotating mechanism (6) being connected to the transmission housing (221); A transmission shaft (222), the transmission shaft (222) being rotatably disposed in the transmission housing (221), and the two ends of the transmission shaft (222) being respectively transmission-connected to the driving end of the telescopic driving mechanism (5) and the storage and retrieval mechanism (3).

3. The liquid nitrogen storage device according to claim 2, characterized in that: The deposit and access mechanism (3) comprises: A storage and access carrier plate (31), wherein the storage and access carrier plate (31) is connected to the transmission housing (221); A moving platform (32), the moving platform (32) being slidably disposed on the access carrier (31) along the horizontal direction; the moving platform (32) being provided with a first rack (321), the end of the transmission shaft (222) being meshingly connected to the first rack (321) for driving the moving platform (32) to move along the horizontal direction; A shovel tray (33), the shovel tray (33) is arranged on the movable platform (32), and the shovel tray (33) is used for storing and accessing the frozen storage box.

4. The liquid nitrogen storage device according to claim 3, characterized in that: The shovel plate (33) is slidably arranged on the movable platform (32) along the horizontal direction; the access mechanism (3) further comprises a driven component (34); the access carrier (31) is provided with a second rack (311); the second rack (311) is transmission-connected to the shovel plate (33) through the driven component (34); when the movable platform (32) moves relative to the access carrier (31), the second rack (311) can drive the shovel plate (33) to move along the horizontal direction.

5. The liquid nitrogen storage device according to claim 3, characterized in that: The storage and retrieval mechanism (3) also includes a distance sensor, which is arranged on the shovel plate (33).

6. The liquid nitrogen storage device according to claim 2, characterized in that: The rotating mechanism (6) comprises: a rotating gear (61), the rotating gear (61) being rotatably mounted on the cover plug (8) and being coaxially sleeved outside the transmission housing (221); a driving bearing (611) being disposed on the rotating gear (61), the transmission housing (221) being provided with a bearing groove (2211) in a vertical direction, and the driving bearing (611) being rollingly mounted in the bearing groove (2211) in the vertical direction; A rotary drive motor (62), wherein the rotary drive motor (62) is disposed on the cover plug (8), and a driving end of the rotary drive motor (62) is connected to the rotary gear (61) for driving the rotary gear (61) to rotate.

7. The liquid nitrogen storage device according to claim 6, characterized in that: The driving bearing (611) and the bearing groove (2211) are both provided in plurality, and the plurality of driving bearings (611) and the plurality of bearing grooves (2211) are provided in one-to-one correspondence.

8. The liquid nitrogen storage device according to claim 2, characterized in that: The telescopic driving mechanism (5) comprises: A sprocket chain assembly (51), the sprocket chain assembly (51) comprising a rod shaft (511), a transmission sprocket (512) and a transmission chain (513), the rod shaft (511) being rotatably arranged on the carrier frame (1), the transmission sprocket (512) being arranged on the rod shaft (511), and the transmission sprocket (512) being transmission-connected to the transmission rotating shaft (222) via the transmission chain (513); A telescopic drive motor (52), wherein the telescopic drive motor (52) is arranged on the carrier frame (1), and a driving end of the telescopic drive motor (52) is drivingly connected to the rod shaft (511) for driving the rod shaft (511) to rotate.

9. The liquid nitrogen storage device according to claim 2, characterized in that: The lifting mechanism (4) comprises: A ball screw assembly (41), the ball screw assembly (41) comprising a screw rod (411) and a nut (412) arranged on the screw rod (411), the screw rod (411) being rotatably arranged on the carrier frame (1), and the nut (412) being connected to the transmission carrier plate (21); A lifting drive motor (42), wherein the lifting drive motor (42) is arranged on the carrier frame (1), and a driving end of the lifting drive motor (42) is drivingly connected to the screw rod (411) for driving the screw rod (411) to rotate.

10. The liquid nitrogen storage device according to any one of claims 1 to 9, characterized in that: The cover plug (8) is movably arranged on the supporting frame (1) along the vertical direction.

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