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Liquid nitrogen storage tank with air pressure type safety protection function

A safety protection, air pressure technology, applied in the field of cryogenic liquid storage equipment, can solve problems such as the expansion of shell cracks, shell cracks, and potential safety hazards for experimenters, and achieve the effect of preventing fatigue detachment, prolonging service life, and improving storage effect.

Active Publication Date: 2021-09-21
长沙中益气体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that there are the following defects: during the transportation and other use of the liquid nitrogen tank, due to incorrect operation, it is easy to cause cracks that cannot be observed by the naked eye on the outer shell of the tank body. When the internal tank is broken, the overflowing liquid nitrogen will easily expand the cracks on the shell and bring safety hazards to the experimenters

Method used

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  • Liquid nitrogen storage tank with air pressure type safety protection function
  • Liquid nitrogen storage tank with air pressure type safety protection function
  • Liquid nitrogen storage tank with air pressure type safety protection function

Examples

Experimental program
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Embodiment 1

[0040] refer to figure 1 , 2 The storage tank includes an outer shell 1 and an inner tank 2, the inner tank 2 is arranged inside the outer shell 1, and the space between the outer shell 1 and the inner tank 2 is a hollow structure. On the outer wall of the liner 2 near the top of the inner liner 2, a circle of mounting discs 7 is fixed by coaxial welding, and the outer edge of the mounting discs 7 is welded and fixed on the inner wall of the shell 1 near the top. The outer side of the liner 2 is located below the mounting plate 7 and is covered with a protective cover 3 , and the upper opening edge of the protective cover 3 is coaxially fixedly connected with the mounting plate 7 . Before the storage tank is produced, the gap between the shell 1 and the protective cover 3 is filled with high-pressure gas, such as nitrogen, oxygen, and the like.

[0041] refer to figure 1 , 2 , after the cracks in the shell 1 cause the gas between the shell 1 and the protective cover 3 to e...

Embodiment 2

[0050] refer to figure 2 , 5 , The difference between Embodiment 2 and Embodiment 1 lies in: the valve assembly 5 is different.

[0051] In this embodiment, the valve assembly 5 includes a solenoid valve 501 installed on the communication pipe 4 for opening and closing the communication pipe 4 . The solenoid valve 501 is electrically connected to the controller 61. When the air pressure value between the protective cover 3 and the shell 1 is lower than the preset value on the controller 61, the controller 61 controls the solenoid valve 501 to open, so that the inner cavity of the inner tank 2 communicates with the inner cavity. There is a gap between the bile 2 and the protective cover 3.

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Abstract

The invention relates to a liquid nitrogen storage tank with an air pressure type safety protection function, which comprises a shell and an inner container; the inner container is fixedly arranged in the shell; a hollow structure is formed between the shell and the inner container; a protective sleeve is arranged between the shell and the inner container; the space between the protective sleeve and the shell is filled with high-pressure gas; a communicating pipe is fixedly arranged on the shell; one end of the communicating pipe is communicated with a gap between the protective sleeve and the inner container, and the other end of the communicating pipe is communicated with an inner cavity of the inner container; and the communicating pipe is provided with a valve assembly used for opening the communicating pipe when air pressure between the shell and the protective sleeve is reduced. When the shell of the storage tank is cracked, high-pressure gas between the shell and the protective sleeve escapes, and the communicating pipe is opened, so that liquid nitrogen stored in the inner container under pressure volatilizes nitrogen and enters the space between the inner container and the protective sleeve, and the protective sleeve is pushed to be in close contact with the inner wall of the shell. The liquid nitrogen storage tank with the air pressure type safety protection function provided by the invention has the effects of improving the safety protection performance of the storage tank and achieving heat insulation and heat preservation on liquid nitrogen in the inner container.

Description

technical field [0001] The present application relates to the field of cryogenic liquid storage equipment, in particular to a liquid nitrogen storage tank with a pneumatic safety protection function. Background technique [0002] A cryogenic liquid storage tank is a compact cryogenic liquid storage device with relatively complete equipment (valve, safety system, etc.). Liquid nitrogen tanks can generally be divided into two types: liquid nitrogen storage tanks and liquid nitrogen transport tanks. The storage tanks are mainly used for static storage of indoor liquid nitrogen and are not suitable for long-distance transportation under working conditions; Conditions, made a special shock-proof design. [0003] The patent with the authorized notification number CN212745960U discloses a low-temperature storage liquid nitrogen tank, which includes a tank body shell and a tank liner; the shell wall of the tank body shell is an internal hollow structure; the tank liner wall is inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C1/12F17C13/02F17C13/08F17C13/04
CPCF17C1/12F17C13/08F17C13/025F17C13/04F17C2201/0109F17C2203/03
Inventor 刘畅章忠韶
Owner 长沙中益气体有限公司
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