Gas-liquid substitution and vacuuming personnel protection cabin

Abstract

The invention relates to a gas-liquid replacement vacuumizing personnel protection cabin which comprises a vacuumizing cabin. A protection cabin body is arranged in the vacuumizing cabin. A vacuumizing cabin airtight door is arranged on one side of the vacuumizing cabin, and a protection cabin airtight door is arranged on one side of the protection cabin body. An air exhaust opening and a first protection gas filling opening are formed in the top of the protection cabin body, and a second protection gas filling opening and a vacuumizing cabin vacuumizing opening are formed in the vacuumizing cabin. A liquid injection and drainage pipeline tee joint is further included, the first end of the liquid injection and drainage pipeline tee joint is connected with a liquid injection opening, the second end of the liquid injection and drainage pipeline tee joint is connected with a liquid drainage opening, and the third end of the liquid injection and drainage pipeline tee joint is introduced into the protection cabin body. According to the gas-liquid replacement vacuumizing personnel protection cabin, the vacuum environment is isolated from the environment where working personnel are located, and the risks of the working personnel during vacuumizing are avoided. Gas injection and liquid drainage are achieved in the protection cabin body, and therefore air can be fast and effectively discharged, components in the air are prevented from being mixed with protection gas, the purity of the protection gas is greatly guaranteed, and protection period waste of the gas replacement link is reduced.

Description

technical field [0001] The invention relates to the field of protective cabins, in particular to a protective cabin for gas-liquid substitution and vacuuming personnel. Background technique [0002] Inert gas is mostly used as shielding gas in welding operations. For large workpieces and complex welds, the overall protection of inert gas is of higher quality than partial protection. Certain special welding operations must be performed in a closed space filled with high-purity inert gas. In order to ensure the purity of the protective gas in the enclosed space, the current method is to vacuumize and then fill the protective gas, but the vacuum environment poses a threat to the safety of personnel, so it cannot be used in a space with people; in addition, there is a direct substitution method, By setting up the conversion facility, the personnel directly physically replace the air in the conversion facility while wearing the breathing apparatus. The direct substitution method...

AI Technical Summary

Problems solved by technology

In order to ensure the purity of the protective gas in the enclosed space, the current method is to vacuumize and then fill the protective gas, but the vacuum environment poses a threat to the safety of personnel, so it cannot be used in a space with people; in addition, there is a direct substitution method, By setting up the conversion facility, the personnel directly physically replace the air in the conversion facility while wearing the breathing apparatus

The direct substitution method has the following disadvantages: 1. A large amount of protective gas is consumed; 2. It is difficult to guarantee the purity of the final gas; 3. Different gases are mixed with each other in the inflation substitution, and the process controllability is poor

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