Plug replacement device for vacuum use of tank and working method of plug replacement device

Abstract

The invention relates to a plug replacement device for vacuum use of a tank and a working method of the plug replacement device, and relates to the field of tank processing. The plug replacement device for vacuum use of the tank and the working method of the plug replacement device have the advantages of simple structure, convenient plug disassembly and assembly and avoiding of vacuum damage. An interlayer is arranged on the outer side wall of the tank, an auxiliary pipe communicates with the interlayer, a plug is arranged in the auxiliary pipe, and a sealing ring is arranged on the plug; theplug replacement device further comprises a valve body I, a valve body II, a vacuum ball valve I, a vacuum ball valve II and a valve rod, wherein openings are formed in the two ends of the valve bodyI, one end of the valve body I is detachably connected with the auxiliary pipe, and the other end of the valve body I is fixedly connected with the vacuum ball valve I; and a connecting opening is formed in the outer side of the valve body II, the connecting opening is connected with the vacuum ball valve II through a clamp II, and the vacuum ball valve II is connected with a vacuum pump. According to the plug replacement device for vacuum use of the tank and the working method of the plug replacement device, on the premise of not damaging vacuum, the use condition of the sealing ring can be conveniently observed, and the replacement is convenient.

Description

technical field [0001] The invention relates to the field of tank body processing, in particular to a plug replacement device for tank vacuum and a working method thereof. Background technique [0002] Tanks such as Dewar tanks are stainless steel pressure vessels with super vacuum insulation, designed for storage, transportation and use of liquid oxygen, liquid nitrogen, liquid argon or carbon dioxide. It is manufactured to DOT4L standard for reliable and economical transport and storage of cryogenic liquid gases, as well as on-site storage and supply of cryogenic liquid gases in a wide range of applications. [0003] In the production process, the purpose of heat insulation is achieved by vacuuming the interlayer of the outer shell and the inner tank. When vacuuming, a push-pull valve is required to change the smoothness or isolation between the vacuum unit and the interlayer to be pumped, which is equivalent to the switch of the gas circuit. . During the vacuum sealing ...

AI Technical Summary

Problems solved by technology

During the vacuum sealing process of the tank body, sealing is carried out by setting a sealing ring on the plug; however, since the sealing ring on the plug is a vulnerable part, it is not easy to observe the use status, and it is not easy to replace, which reduces the working reliability

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