Vacuum sampling device and sampling method

Abstract

A vacuum sampling method comprises the steps: under a condition of keeping a negative pressure in a kettle body of a reaction kettle, allowing a sampled material to enter a sampling container; followed by, closing the sampling container, then injecting inert gas to discharge the sampled material, and thus realizing sampling. A vacuum sampling device includes a sampling barrel, a sampling tube, a rocker arm and a gas-filling tube; the sampling barrel stretches into the kettle body of the reaction kettle and has the lower end opening, the sampling tube and the gas-filling tube are both located in the sampling barrel, the rocker arm is located in the sampling barrel and is in coaxial arrangement with the sampling barrel, the lower end of the rocker arm is fixedly provided with a rubber plug which can seal the opening of the lower end of the sampling barrel. According to the vacuum sampling device and the sampling method, the sampling barrel and the reaction kettle are isolated through the rubber plug; through injection of the inert gas, a negative pressure state of the sampling barrel is changed into a positive pressure state, the material is sampled, in the whole sampling process, the kettle body of the reaction kettle still remains the vacuum (negative pressure) state, the pressure condition is not changed, and the production process is not affected; and beneficial effects are remarkable, and the device and the method are suitable for application.

Description

Technical field [0001] The invention relates to a vacuum sampling device and a sampling method, and more specifically, to a vacuum sampling device and a sampling method that selectively seal a sampling barrel with a rubber stopper to take out materials. Background technique [0002] At present, the chemical, pharmaceutical, food and other industries use negative pressure reactions in many cases, and most of the reaction devices are kettle-type reactors such as reactors. Such reactors can be effectively sealed to meet the requirements of negative pressure reactions, but sampling must be Stopping the vacuum and then realizing sampling is sometimes contrary to the requirements of the production process. If there is a special sampling device, it can effectively realize sampling under vacuum without changing the pressure in the reaction process, which will meet the needs of continuous and stable production. Summary of the invention [0003] In order to overcome the shortcomings of the...

AI Technical Summary

Problems solved by technology

[0002] At present, chemical, pharmaceutical, food and other industries use negative pressure reactions in many cases, and most of the reaction devices are reactors such as reactors. These reactors can be effectively sealed to meet the requirements of negative pressure reactions, but must be taken during sampling. Stop the vacuum and then realize the sampling. This operation mode is sometimes contrary to the requirements of the production process.

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