CN211002701U

CN211002701U - Layered storage device and liquid nitrogen storage tank

Info

Publication number: CN211002701U
Application number: CN201921822283.2U
Authority: CN
Inventors: 马才启; 马婧宁
Original assignee: Guangzhou Women and Childrens Medical Center
Current assignee: Guangzhou Women and Childrens Medical Center
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-07-14
Anticipated expiration: 2029-10-28

Abstract

The utility model relates to a layer-stepping storage device and liquid nitrogen holding vessel, layer-stepping storage device include storage unit and handle. The storage unit is provided with a plurality of, and a plurality of storage units are arranged from top to bottom in proper order. The handle includes the jib and sets up the couple on the jib, and the couple is used for hanging to establish on the liquid nitrogen holding vessel. The lifting handle is provided with a plurality of lifting handles, and the suspension rod of each lifting handle is correspondingly connected with one storage unit. The storage units are arranged from top to bottom in sequence, and each storage unit is correspondingly connected with one handle. If the biological tissue specimen in a certain storage unit needs to be used, the required storage unit can be independently extracted without taking out other storage units, so that the influence on the freezing effect caused by the contact of the biological tissue specimen in other storage units with the outside can be avoided. In addition, arrange the setting from last to down with a plurality of storage unit in proper order, can make full use of liquid nitrogen holding vessel's high space, improve liquid nitrogen holding vessel's space utilization and storage capacity.

Description

Layered storage device and liquid nitrogen storage tank

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a layered storage device and liquid nitrogen holding vessel.

Background

The liquid nitrogen is liquid formed by nitrogen at low temperature, has extremely low temperature, can be used as a refrigerant, is used for preserving the biological tissue specimen for a long time, and prevents the biological tissue specimen from being damaged. In order to improve the safety and stability of the storage of the biological tissue specimen, the biological tissue specimen is usually stored in a liquid nitrogen storage tank for low-temperature preservation, and specifically, a storage unit is arranged in the liquid nitrogen storage tank, and the biological tissue specimen is placed in the storage unit. Traditional storage unit divide into square net hand-basket and circular pail, and the storage capacity of square net hand-basket is big, but when taking the biological tissue sample in the hand-basket at every turn, need take out whole hand-basket from the liquid nitrogen holding vessel, thereby not only extravagant liquid nitrogen, thereby can also lead to the biological tissue sample in the whole hand-basket to appear the risk that intensifies and influence freezing effect moreover. In addition, the pail in the liquid nitrogen holding vessel is mostly single-layer structure, and biological tissue sample intensification risk is less, but the space utilization of liquid nitrogen holding vessel is low, and storage capacity is little.

SUMMERY OF THE UTILITY MODEL

Therefore, there is a need for a layered storage device and a liquid nitrogen storage tank, which can reduce the risk of temperature rise of biological tissue specimens and improve the space utilization and storage capacity of the liquid nitrogen storage tank.

A tiered storage device comprising:

the storage units are arranged in a plurality and are sequentially arranged from top to bottom;

the lifting handle comprises a hanging rod and a hook arranged on the hanging rod, and the hook is used for being hung on a liquid nitrogen storage tank; the lifting handle is provided with a plurality of lifting handles, and the suspension rod of each lifting handle is correspondingly connected with one storage unit.

The layered storage device at least has the following advantages:

in the layered storage device, the storage units are arranged from top to bottom in sequence, and each storage unit is correspondingly connected with one handle. If the biological tissue specimen in a certain storage unit needs to be used, the required storage unit can be independently extracted without taking out other storage units, so that the influence on the freezing effect caused by the contact of the biological tissue specimen in other storage units with the outside can be avoided. In addition, a plurality of storage units are arranged from top to bottom in sequence, so that the height space of the liquid nitrogen storage tank can be fully utilized, and the space utilization rate and the storage capacity of the storage units are improved.

The technical solution is further explained below:

in one embodiment, the storage unit comprises at least two storage containers, which are rotatably arranged on the suspension bar of the handle.

In one embodiment, the tiered storage device further includes a fixture disposed on the storage container for maintaining consistency of the location of the storage container.

In one embodiment, the fixing piece comprises a positioning rod, and a positioning block is arranged on the positioning rod; a positioning channel is arranged in the storage container, the positioning channel is matched with the positioning rod, and the positioning rod is inserted into the positioning channel; the size of the positioning block is larger than that of the positioning channel, and the positioning block is used for being pressed against the top of the storage unit.

In one embodiment, a plurality of hooks are arranged on the liquid nitrogen storage tank in a gradient manner.

In one embodiment, the sizes of the bottom surfaces of the storage units arranged from top to bottom are gradually increased.

In one embodiment, the tiered storage device further includes a divider panel disposed within the storage unit, the divider panel being configured to divide the storage space of the storage unit into a plurality of storage areas.

In one embodiment, the tiered storage unit further includes a bracket disposed at a top of the storage unit and coinciding with a central axis of the top surface of the storage unit, the lifting bar being disposed in a middle portion of the bracket.

A liquid nitrogen storage tank comprises a tank body, an inner container arranged in the tank body and a layered storage device, wherein the inner container is used for injecting liquid nitrogen; the tank body is provided with a groove, and the hook of the handle is arranged in the groove and used for hanging the layered storage device in the inner container.

According to the liquid nitrogen storage tank, the storage units are sequentially arranged from top to bottom, and each storage unit is correspondingly connected with one handle. If the biological tissue specimen in a certain storage unit needs to be used, the required storage unit can be independently extracted without taking out other storage units, so that the influence on the freezing effect caused by the contact of the biological tissue specimen in other storage units with the outside can be avoided. In addition, arrange the setting from last to down with a plurality of storage unit in proper order, can make full use of liquid nitrogen holding vessel's high space, improve liquid nitrogen holding vessel's space utilization and storage capacity.

In one embodiment, the liquid nitrogen storage tank further comprises a sensor, a controller and a vacuum pump, wherein the sensor is used for detecting the vacuum degree in the tank body, and the controller is electrically connected with the vacuum pump and the sensor respectively; the tank body is provided with an air exhaust port, and the vacuum pump is connected to the air exhaust port and used for vacuumizing the tank body.

Drawings

Fig. 1 is a schematic structural view of a lift-type layered storage apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a basket-type layered storage apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a memory cell in a tiered storage device according to an embodiment of the present invention;

fig. 4 is a schematic view illustrating another structure of a memory cell in a tiered storage device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a liquid nitrogen storage tank according to an embodiment of the present invention.

Description of reference numerals:

1. the layered storage device comprises a layered storage device body 10, a storage unit 11, a storage container 12, a positioning channel 13, a first storage unit 14, a second storage unit 15, a third storage unit 20, a handle 21, a hanging rod 22, a hook 23, a first handle 24, a second handle 25, a third handle 30, a positioning rod 31, a positioning block 40, a support 50, a partition plate 60, a liquid nitrogen storage tank 61, a tank body 62, a liner 63 and a supporting block.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Referring to fig. 1, 2 and 5, an embodiment of a tiered storage device includes a storage unit 10 and a handle 20. The storage units 10 are provided in plurality, and the plurality of storage units 10 are arranged in sequence from top to bottom. The handle 20 comprises a hanging rod 21 and a hook 22 arranged on the hanging rod 21, and the hook 22 is used for being hung on the liquid nitrogen storage tank 60. The handle 20 is provided with a plurality of hangers 21 of each handle 20 are connected to one storage unit 10 correspondingly.

In the layered storage device, the storage units 10 are sequentially arranged from top to bottom, and each storage unit 10 is correspondingly connected with one handle 20. If the biological tissue specimen in one storage unit 10 needs to be used, the required storage unit 10 can be independently extracted without taking out the rest of the storage units 10, so that the biological tissue specimen in the rest of the storage units 10 can be prevented from contacting with the outside to influence the freezing effect. In addition, arranging a plurality of storage units 10 in sequence from top to bottom can make full use of the height space of the liquid nitrogen storage tank 60, and improve the space utilization rate and storage capacity of the liquid nitrogen storage tank 60.

The storage unit 10 includes the storage containers 11, and it is understood that one storage container 11 may be one storage unit 10, and more than two storage containers 11 may be connected to form one storage unit 10. In the present embodiment, the number of the storage containers 11 in the storage unit 10 can be set according to actual requirements, for example, one storage container 11 is disposed in one storage unit 10, and two storage containers 11 are disposed in another storage unit 10, which is not limited thereto. In addition, the number of the storage units 10 is at least two, the storage units 10 are sequentially arranged from top to bottom, and each storage unit 10 is connected with a handle 20. Of course, the number of the storage units 10 may be two or more according to actual requirements, and is not limited thereto.

In one embodiment, the hanger bar 21 of the handle 20 is connected to the outside wall of the storage container 11. In use, the storage unit 10 can be taken out from the liquid nitrogen storage tank 60 by moving the boom 21 upwards; alternatively, the storage unit 10 may be placed into the liquid nitrogen storage tank 60 by moving the boom 21 downward.

Further, if the storage unit 10 includes at least two storage containers 11, the storage containers 11 are rotatably disposed on the hanger bars 21 of the handle 20. When the biological tissue specimen in the storage container 11 needs to be taken out, one of the storage containers 11 is rotated to stagger the positions of two vertically adjacent storage containers 11, so that the biological tissue specimen in the lower storage container 11 can be taken out conveniently. Can make two adjacent storage container 11 setting of staggering about through the mode of rotating storage container 11, guarantee not influencing under the prerequisite of the biological tissue sample's in the lower floor storage container 11 the prerequisite, can reduce the interval between two adjacent storage container 11 about. As the distance between the storage containers 11 is reduced, one or more storage containers 11 can be arranged along the height direction of the liquid nitrogen storage tank 60, the height space of the liquid nitrogen storage tank 60 is fully utilized, and the space utilization rate and the storage capacity of the liquid nitrogen storage tank 60 are improved.

Specifically, the outer side wall of the storage container 11 is rotatably connected to the hanger bar 21 of the handle 20. The hanger rod 21 of the handle 20 is provided with a bearing seat, and the outer side wall of the storage container 11 is provided with a bearing, and the bearing is rotatably connected with the bearing seat. By arranging the bearing rotatably in the bearing seat, the storage container 11 can be arranged rotatably on the suspension bar 21 of the handle 20.

Further, the tiered storage device 1 further includes a fixing member disposed on the storage container 11 for maintaining consistency of the position of the storage container 11.

In one embodiment, referring to fig. 3, the fixing element includes a positioning rod 30, a positioning channel 12 is disposed in the storage container 11 and has a size corresponding to that of the positioning rod 30, the positioning channel 12 penetrates through the storage container 11 of the storage unit 10, and the positioning rod 30 is configured to be inserted into the positioning channel 12. Since the storage containers 11 are rotatably disposed on the suspension rods 21 of the handle 20, in order to prevent the storage containers 11 from being rotationally staggered in the liquid nitrogen storage tank 60, the positioning rod 30 is inserted into the positioning channel 12, so that the position consistency of the plurality of storage containers 11 in the liquid nitrogen tank can be ensured. In the present embodiment, the positioning channel 12 is circular or square, and correspondingly, the positioning rod 30 is also circular or square. Of course, the shapes of the positioning channel 12 and the positioning rod 30 may be set according to actual requirements, and are not limited thereto.

In the present embodiment, referring to fig. 2, 3 and 5, the storage unit 10 includes two storage containers 11, and the positioning channel 12 is disposed at a central position of the two storage containers 11. If the layered storage device 1 needs to be placed in the liquid nitrogen storage tank 60, the positioning rod 30 is inserted into the positioning channel 12, so that the consistency of the positions of the two storage containers 11 in the liquid nitrogen storage tank 60 is ensured, and the storage containers 11 are prevented from rotating in the liquid nitrogen storage tank 60 to affect the placement of the rest of the storage units 10. When the biological tissue specimen in the layered storage apparatus 1 is to be taken out, the positioning rod 30 is taken out from the positioning passage 12, and the storage containers 11 are rotated so that the positions of the upper and lower storage containers 11 are shifted, whereby the biological tissue specimen in the lower storage container 11 can be taken out.

Further, referring to fig. 3 and 5, a positioning block 31 is disposed at an end of the positioning rod 30. The positioning block 31 is provided on the positioning rod 30, so that the positioning rod 30 is prevented from slipping down from the positioning passage 12 into the liquid nitrogen storage tank 60. Specifically, the size of the positioning block 31 is larger than the size of the positioning passage 12. When the positioning rod 30 is inserted into the positioning channel 12, the bottom end of the positioning block 31 is pressed against the top of the upper storage container 11, so as to prevent the positioning rod 30 from sliding down from the positioning channel 12 into the liquid nitrogen storage tank 60. In the present embodiment, the positioning block 31 is circular, elliptical, square, etc., but not limited thereto.

In another embodiment, the fixing member is a buckle, and the buckle is disposed on the storage container 11, and two adjacent storage containers 11 are fixed together by the buckle, so that the positions of two adjacent storage containers 11 are kept consistent.

Further, referring to fig. 2 and 5, a plurality of hooks 22 are arranged in a gradient on the liquid nitrogen storage tank. During the use, layered storage device 1's couple 22 hooks and establishes the open end at liquid nitrogen holding vessel 60, through being the gradient setting with couple 22 on the liquid nitrogen holding vessel, the operating personnel of being convenient for discern fast and take out required storage unit 10, reduce the waste of liquid nitrogen in the liquid nitrogen holding vessel 60, also can avoid simultaneously because of taking out storage unit 10 many times, make storage unit 10 and external contact, the problem that the biological tissue sample that leads to in the storage unit 10 heaies up.

Specifically, referring to fig. 1 and 2, each storage unit 10 is connected to a handle 20, and the heights of the handles 20 of the storage units 10 sequentially arranged from top to bottom are sequentially increased. In this embodiment, the storage units 10 are three, and include a first storage unit 13, a second storage unit 14 and a third storage unit 15 which are sequentially arranged from top to bottom, the first storage unit 13 is connected with a first handle 23, the second storage unit 14 is connected with a second handle 24, the third storage unit 15 is connected with a third handle 25, and the heights of the hooks 22 on the first handle 23, the second handle 24 and the third handle 25 are sequentially increased.

In one embodiment, referring to fig. 2 and 3, the storage container 11 is a basket. Specifically, one basket may form the storage unit 10, two baskets may be assembled to form the storage unit 10, and three baskets may be assembled to form the storage unit 10. The number of the baskets in the storage unit 10 can be set according to actual requirements, such as the size of the baskets, but not limited thereto. In this embodiment, the storage unit 10 includes two baskets, which are sequentially arranged from top to bottom and connected to each other.

Further, in order to fully utilize the height space of the liquid nitrogen storage tank 60, a plurality of storage units 10 are provided, the plurality of storage units 10 are sequentially arranged from top to bottom, and each storage unit 10 is correspondingly connected with one handle 20, so that the required biological tissue specimens in the storage unit 10 can be taken out independently. Of course, the number of the baskets in each storage unit 10 may be equal or unequal, for example, one of the storage units 10 is sequentially provided with three baskets from top to bottom, the other storage unit 10 is sequentially provided with two baskets from top to bottom, and the number of the baskets in each storage unit 10 may be set according to actual requirements, which is not limited thereto. In this embodiment, three storage units 10 are provided, the three storage units 10 are sequentially arranged from top to bottom, and each of the three storage units 10 is connected with one handle 20.

In another embodiment, referring to fig. 1 and 5, the storage container 11 is a lifting cylinder. In this embodiment, the storage unit 10 includes a carrying handle, which is connected to a carrying handle 20, so that the carrying handle can be easily removed by an operator. Specifically, the number of the lifting cylinders in the storage unit 10 may be set according to actual requirements, but is not limited thereto. Specifically, in order to fully utilize the height space of the liquid nitrogen storage tank 60, the storage units 10 are provided in plurality, the plurality of storage units 10 are sequentially arranged from top to bottom, and each storage unit 10 is correspondingly connected with one handle 20, so that the required biological tissue specimens in the storage units 10 can be taken out independently. In this embodiment, three storage units 10 are provided, the three storage units 10 are sequentially arranged from top to bottom, and each of the three storage units 10 is connected with one handle 20.

In addition, the storage unit 10 may also include two structures, i.e. a lifting cylinder and a lifting basket, which are connected to form one storage unit 10, or a lifting cylinder and a lifting basket, which form one storage unit 10, are arranged in sequence from top to bottom.

Further, the sizes of the bottom surfaces of the storage units 10 arranged in sequence from top to bottom gradually increase. On the one hand, the storage unit 10 at the lower layer is convenient to take out from the liquid nitrogen storage tank 60; on the other hand, the storage unit 10 can be stably placed in the liquid nitrogen storage tank 60. When it is desired to remove the desired storage unit 10, the hanger 22 is removed from the liquid nitrogen storage tank 60, the storage unit 10 is moved to an intermediate position of the liquid nitrogen storage tank 60, and the handle 20 is moved upward to remove the storage unit 10 from the liquid nitrogen storage tank 60. If the storage unit 10 is to be placed in the liquid nitrogen storage tank 60, the storage unit 10 is first placed in the middle of the liquid nitrogen storage tank 60, and the handle 20 is moved downward. After the storage unit 10 is moved to a proper height, the storage unit 10 is moved to a side wall close to the liquid nitrogen storage tank 60, and the hook 22 is hooked on the liquid nitrogen storage tank 60.

In one embodiment, referring to fig. 4, the tiered storage system 1 further includes a support 40, the support 40 is disposed on the top of the storage unit 10, the support 40 is coincident with the central axis of the top surface of the storage unit 10, and the lifting bar is disposed at the middle position of the support 40. Specifically, both ends of the bracket 40 are respectively connected to the outer walls of the storage unit 10. By providing the support 40 at the top of the storage unit 10, the support 40 coinciding with the central axis of the storage unit 10, and the lifting bar being provided at the middle position of the support 40, the storage unit 10 can be kept in balance during the removal of the storage unit 10 to smoothly remove the storage device from the liquid nitrogen storage tank 60. Of course, one end of the handle 20 may be directly connected to the outer sidewall of the storage unit 10. In the present embodiment, the rack 40 is disposed on the uppermost storage unit 10.

Further, referring to fig. 3 and 4, a partition plate 50 is provided in the storage container 11. By providing the partition plate 50 in the storage container 11, the storage space of the storage container 11 is partitioned into a plurality of storage areas, so that different kinds of biological tissue targets can be placed in different storage areas, and it is convenient to quickly identify a desired biological tissue specimen. In the present embodiment, the partition plate 50 is provided with four pieces, the side walls of the four pieces of partition plate 50 abut against the inner side wall of the storage container 11, respectively, and the partition plate 50 divides the storage space of the storage container 11 into four storage areas in equal parts. The number of the partition plates 50 may be set according to actual requirements, and is not limited thereto.

In one embodiment, referring to fig. 1 to 5, a liquid nitrogen storage tank 60 includes a tank 61, an inner container 62 disposed in the tank 61, and the layered storage apparatus 1 in any of the above embodiments. The inner container 62 is used for injecting liquid nitrogen, the tank body 61 is provided with a groove, and the hook 22 of the handle 20 is arranged in the groove and used for hanging the layered storage device 1 in the inner container 62.

In the liquid nitrogen storage tank 60, the storage units 10 are arranged in sequence from top to bottom, and each storage unit 10 is correspondingly connected with one handle 20. If the biological tissue specimen in one storage unit 10 needs to be used, the required storage unit 10 can be independently extracted without taking out the rest of the storage units 10, so that the biological tissue specimen in the rest of the storage units 10 can be prevented from contacting with the outside to influence the freezing effect. In addition, the plurality of storage units 10 are arranged from top to bottom in sequence, so that the height space of the liquid nitrogen storage tank 60 can be fully utilized, and the space utilization rate and the storage capacity of the storage units 10 are improved.

Specifically, the tiered storage device 1 is arranged at equal intervals along the circumference of the inner container 62, and the grooves are arranged at equal intervals along the top of the tank 61. In the present embodiment, ten tiered storage devices 1 are provided, the ten tiered storage devices 1 being arranged at equal intervals in the circumferential direction of the inner liner 62; each layered storage device 1 comprises three storage units 10, and three handles 20 are connected to the three storage units 10 respectively; thirty grooves are equally spaced on the top of the can body 61. After the layered storage device 1 is placed in the inner container 62, the hooks 22 of the handle 20 are hooked in the corresponding grooves in sequence, so that the layered storage device 1 can be hung on the liquid nitrogen storage tank 60.

In one embodiment, the sides of the groove are marked with numbers to facilitate the operator to record the specific location of the biological tissue specimen. When the required biological tissue specimen needs to be extracted, the operator can quickly find the corresponding layered storage device 1 according to the recorded numbers.

Further, the liquid nitrogen storage tank 60 further includes a vacuum pump, a controller and a sensor for detecting the vacuum degree in the tank body, and the controller is electrically connected to the vacuum pump and the sensor respectively. The tank body 61 is provided with an air exhaust port, and the vacuum pump is connected to the air exhaust port to vacuumize the tank body 61. When the liquid nitrogen storage tank 60 is in use, the vacuum degree in the vacuum space is reduced, and when the sensor detects that the vacuum degree is lower than a preset value, the controller controls the vacuum pump to vacuumize so as to maintain the vacuum degree in the vacuum space.

Specifically, the liquid nitrogen storage tank 60 further includes a sealing plug, which is plugged at the suction port of the tank body 61. In the process of using the liquid nitrogen storage tank 60, the sealing plug is sealed at the air suction port, so that the vacuum in the tank body 61 is prevented from overflowing from the air suction port. And when the sensor detects that the vacuum degree in the vacuum space is lower than a preset value, the sealing plug is opened, and the vacuum pump performs vacuum pumping.

Further, the top of the inner bladder 62 is coated with an adsorbent. Specifically, the adsorbent is a hydrophobic liquid nitrogen adsorbent, and the hydrophobic liquid nitrogen adsorbent is coated on the top of the inner container 62, so that the humidity can be effectively limited, and the storage time can be prolonged. Of course, the hydrophobic liquid nitrogen adsorbent may also be coated on the entire liner 62 to better limit the humidity. The coating thickness of the hydrophobic liquid nitrogen adsorbent can be set according to actual requirements, for example, the thickness of the hydrophobic liquid nitrogen adsorbent disposed on the top of the inner container 62 is thicker, and particularly the thickness of the hydrophobic liquid nitrogen adsorbent disposed closer to the opening region of the inner container 62 is thicker, so as to reduce water vapor entering the inner container 62 and effectively limit the humidity.

Further, a heat insulator is also arranged in the liquid nitrogen storage tank 60, and the heat insulator is covered on the inner container 62, or the heat insulator is arranged on the outer side wall of the inner container 62 and the inner side wall of the tank body 61. The outer side wall of the inner container 62 is covered with a heat insulator, so that heat exchange between the inner container 62 and the outside can be effectively prevented. Specifically, since it is necessary to open the tank 61 frequently to take and place the tiered storage device 1, a plurality of layers of heat insulators are provided on the inner side wall of the opening of the tank 61 to insulate the tank effectively.

In one embodiment, referring to fig. 5, the liquid nitrogen storage tank 60 further includes a supporting block 63, the supporting block 63 is disposed on the liner 62, and an end of the supporting block 63 abuts against an inner sidewall of the tank 61. Because the supporting block 63 on the inner container 62 abuts against the inner side wall of the tank body 61, the installation stability of the inner container 62 can be improved, and the transportation is facilitated.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A tiered storage device, comprising:

2. The tiered storage arrangement of claim 1 wherein the storage units include at least two storage containers pivotally mounted on the hanger bar of the handle.

3. The tiered storage device of claim 2 further including a fastener disposed on the storage container for maintaining consistency in the location of the storage container.

4. The tiered storage device of claim 3 wherein said securing elements include securing posts with locating blocks disposed thereon; a positioning channel is arranged in the storage container, the positioning channel is matched with the positioning rod, and the positioning rod is inserted into the positioning channel; the size of the positioning block is larger than that of the positioning channel, and the positioning block is used for being pressed against the top of the storage unit.

5. The tiered storage device of any one of claims 1 to 4 wherein a plurality of said hangers are arranged in a gradient on said liquid nitrogen storage tank.

6. The tiered storage device of any one of claims 1 to 4 wherein the storage units, in order from top to bottom, have bottom surfaces of increasing size.

7. The tiered storage device of any one of claims 1 to 4 further including divider panels disposed within the storage units for dividing the storage space of the storage units into a plurality of storage regions.

8. The tiered storage device of any one of claims 1 to 4 further including a shelf disposed at a top of the storage unit and coinciding with a central axis of a top surface of the storage unit, the handle being disposed at a middle of the shelf.

9. A liquid nitrogen storage tank is characterized by comprising a tank body, an inner container arranged in the tank body and the layered storage device as claimed in any one of claims 1 to 8, wherein the inner container is used for injecting liquid nitrogen; the tank body is provided with a groove, and the hook of the handle is arranged in the groove and used for hanging the layered storage device in the inner container.

10. The liquid nitrogen storage tank of claim 9, further comprising a sensor for detecting a vacuum level in the tank body, a controller and a vacuum pump, wherein the controller is electrically connected to the vacuum pump and the sensor, respectively; the tank body is provided with an air exhaust port, and the vacuum pump is connected to the air exhaust port and used for vacuumizing the tank body.