CN-121993724-A - Liquid nitrogen storage tank

CN121993724ACN 121993724 ACN121993724 ACN 121993724ACN-121993724-A

Abstract

The liquid nitrogen storage tank structurally comprises a tank body, wherein the tank body is composed of a first shell and a second shell which are connected with each other, the first shell is located on the outer side, the second shell is located on the inner side, a space is reserved between the first shell and the second shell, an inner container is arranged in the second shell, a hollow cavity is formed between the inner container and the second shell, a containing cavity for containing liquid nitrogen is formed between the inner container and the second shell, a liquid nitrogen filling opening and a liquid nitrogen exhaust opening are further formed in the second shell, the liquid nitrogen filling opening is communicated with the containing cavity, liquid nitrogen is filled into the containing cavity, and the exhaust opening is used for exhausting redundant gas in the containing cavity.

Inventors

LUO XIANG
YANG GANG
SHI KAIQI

Assignees

宁波诺丁汉大学

Dates

Publication Date: 20260508
Application Date: 20251230

Claims (9)

1. A liquid nitrogen storage tank is characterized by comprising a tank body, wherein the tank body is composed of a first shell and a second shell which are connected with each other, the first shell is located on the outer side, the second shell is located on the inner side, a space is reserved between the first shell and the second shell, an inner container is arranged in the second shell, a hollow cavity is formed in the inner container, a containing cavity for containing liquid nitrogen is formed between the inner container and the second shell, a liquid nitrogen filling opening and a liquid nitrogen exhaust opening are further formed in the second shell, the liquid nitrogen filling opening and the liquid nitrogen exhaust opening are communicated with the containing cavity, the liquid nitrogen filling opening is used for filling liquid nitrogen into the containing cavity, and the exhaust opening is used for exhausting redundant gas in the containing cavity.
2. The liquid nitrogen storage tank of claim 1, wherein the inner wall of the inner container is of a tapered structure which gradually reduces from top to bottom.
3. The liquid nitrogen storage tank of claim 1, wherein the upper end face of the second shell protrudes out of the upper end face of the first shell, and the liquid nitrogen filling port and the liquid nitrogen exhaust port are both arranged on the outer wall of the protruding section.
4. The liquid nitrogen storage tank of claim 1, wherein the first shell and the second shell are equidistantly spaced.
5. The liquid nitrogen storage tank of claim 1, wherein the upper end face of the liner is higher than the upper end face of the first shell and lower than the upper end face of the second shell.
6. The liquid nitrogen storage tank of claim 1, wherein the inner cavity of the liner is also provided with a detachable lining, the inner wall and the outer wall of the detachable lining in the thickness direction are matched with the inner wall of the hollow cavity, and the outer wall of the detachable lining is attached to the inner wall of the hollow cavity after the detachable lining is arranged in the hollow cavity.
7. The liquid nitrogen storage tank of claim 6, wherein the liner and the second housing are integrally formed.
8. The liquid nitrogen storage tank of claim 1, wherein a spraying device is arranged in the hollow cavity of the liner, and the spraying device is used for spraying materials.
9. The liquid nitrogen storage tank of claim 1, wherein a space is provided between the bottom end of the inner container and the inner bottom surface of the second shell, and a space is also provided between the inner bottom surface of the first shell and the outer bottom surface of the second shell.

Description

Liquid nitrogen storage tank Technical Field The application relates to the technical field of liquid nitrogen storage and use, in particular to a liquid nitrogen storage tank. Background Liquid nitrogen is mainly applied to the fields of high-end inhalation preparations, vaccines, biological pharmacy, special functional materials and the like, so that the liquid nitrogen is taken as a material capable of realizing a freezing effect and plays a very important role in the industrial field. The liquid nitrogen is generally stored in equipment and is connected to a corresponding application scene for use when the liquid nitrogen is required to be used, but the device for storing the liquid nitrogen in the prior art has certain defects that continuous volatilization is carried out, freezing temperature is unstable, liquid nitrogen in an open liquid nitrogen tank is quickly volatilized, stable ultralow temperature environment is difficult to maintain for a long time, the freezing efficiency is inconsistent, uniformity of micro-nano particles and controllability of pore structures are affected, liquid nitrogen is frequently supplemented, operation is interrupted, the liquid nitrogen is required to be frequently injected due to limited liquid nitrogen capacity, operation is complicated, the preparation process is discontinuous, batch and long-time continuous production is difficult to realize, the structure is complex, the integration level is low, the traditional device is required to be externally connected with a liquid nitrogen supply system, a spraying system and a collecting system, the equipment occupation space is large, connection is complex, the operation threshold is high, the laboratory is not beneficial to quickly build and use, freezing and collecting processes are separated, the efficiency is low, frozen particles are required to be transferred from a freezing medium to the collecting device, melting or structure destruction is easy to occur in the process, the appearance and performance of a final product are affected, the conventional equipment is poor in fixed volume, the conventional equipment is difficult to flexibly adjust the scale or the whole laboratory to be designed to be in a large scale, and the laboratory scale is required to be enlarged and suitable for large-scale test system. Disclosure of Invention Aiming at the defects in the prior art, the application provides the liquid nitrogen storage tank which can realize a continuous and stable ultralow-temperature environment, is prepared in a continuous batch mode for a long time, is simple and convenient to operate and is easy to expand in scale. In order to solve the technical problems, the liquid nitrogen storage tank comprises a tank body, wherein the tank body is composed of a first shell and a second shell which are connected with each other, the first shell is located on the outer side, the second shell is located on the inner side, a space is reserved between the first shell and the second shell, an inner container is arranged in the second shell, a hollow cavity is formed in the inner container, a containing cavity for containing liquid nitrogen is formed between the inner container and the second shell, a liquid nitrogen filling opening and a liquid nitrogen exhaust opening are further formed in the second shell, the liquid nitrogen filling opening is communicated with the containing cavity, the liquid nitrogen filling opening is used for filling liquid nitrogen into the containing cavity, and the exhaust opening is used for exhausting redundant gas in the containing cavity. By adopting the structure, the application forms the containing cavity for containing liquid nitrogen through the matching of the liner structure and the second shell for the first time; the multifunctional liquid nitrogen storage tank can realize multiple functions by increasing the storage capacity of the large liquid nitrogen in the storage cavity and adopting a closed tank body structure, remarkably prolongs the maintenance time of the liquid nitrogen, ensures that the temperature of the inner wall of the inner tank is always continuously lower than the target temperature in the whole preparation process of frozen particles, improves the stability and repeatability of the freezing process, continuously stabilizes the ultralow temperature environment, directly serves as a freezing preparation device, has high liquid nitrogen storage tank capacity, supports long-time continuous operation, is suitable for batch preparation and small-scale continuous production of a laboratory, improves the preparation efficiency, realizes long-time continuous preparation of liquid nitrogen, can transfer the storage and the inner tank to the whole preparation process of the frozen particles, has the advantages of easy and convenient and compact structure, can be easily transferred to a carrier, has high integration rate, is easy to be used as a carrier, is easily integrated