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A device for preparing trace components in a constant-volume constant-volume gas under normal pressure

A trace component, constant volume technology, used in gas and gas/vapor mixing, mixer accessories, dissolution, etc., can solve the problems of safety and high price, and achieve the effect of low cost

Active Publication Date: 2014-10-15
SHANGHAI TIANKE CHEM INSPECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to develop a device for preparing trace components in a constant-volume constant-volume gas under normal pressure, so as to solve the problems of safety and high price of the partial pressure control gas distribution system currently used.

Method used

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  • A device for preparing trace components in a constant-volume constant-volume gas under normal pressure
  • A device for preparing trace components in a constant-volume constant-volume gas under normal pressure
  • A device for preparing trace components in a constant-volume constant-volume gas under normal pressure

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Embodiment

[0034] The structure of the preparation device for trace components in atmospheric pressure balance stepwise constant volume gas is as follows figure 1 As shown, it is composed of a modular structure and specifically includes the following components:

[0035] Constant volume bottle assembly 7, its structure is as figure 2 Shown: There are two groups, including a fixed-volume bottle shell made of hard glass, a bottle mouth reversing valve 71 integrated with the stopper, and a built-in elastic air bag 72 and an electromagnetic stirrer 73 in the fixed-volume bottle shell.

[0036] Constant volume reversing valve assembly 5, its structure is as Figure 3-4 Shown: There are two groups, which are used as the primary constant volume and the secondary constant volume. They are composed of a valve body, a background gas inlet 52, and a component gas inlet 53. The valve body has a sealing tube 51 equivalent to a quantitative ring for constant volume. The reversing valve assembly 5 is respec...

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Abstract

The invention relates to a preparation device for trace components in a constant-volume constant-volume gas under normal pressure. The bottle assembly is composed of the following components: bottle mouth reversing valve and bottle stopper, elastic air bag, electromagnetic stirrer, constant volume reversing valve assembly is composed of valve body, component gas inlet and outlet and background gas inlet and outlet. Compared with the prior art, the present invention, through a series of special modular structural designs, can achieve the purpose of quantitatively preparing component gases with extremely low concentrations under the premise of avoiding the use of complicated pressure dividing equipment; at the same time, the purpose of preparing Gases with different concentrations can be realized only by replacing the constant volume reversing valve assembly of different models (volume of constant volume tube), or increasing or decreasing the number of stages of the dilution device of "constant volume reversing valve assembly-constant volume bottle assembly". The device has the characteristics of simplicity, safety, and low cost.

Description

Technical field [0001] The invention relates to a component gas preparation device, in particular to a preparation device for trace components in atmospheric pressure balanced stepwise constant volume gas. Background technique [0002] At present, with the continuous development of the national economy and the level of science and technology, especially the continuous progress of the chemical and electronic industries, the requirements for the purity of various special gases are getting higher and higher: for example, in the measurement of high-purity gases. -6 To 10 -9 For mol / mol trace impurities, higher purity "zero gas" is required. The content of related component gases in this zero gas should be 1-2 lower than the content of unknown component gases in the sample gas to be tested In the order of magnitude, how to conveniently, quickly and accurately formulate a mixed gas containing trace amounts (ppbv, that is, on the order of one billionth of a volume) in the background gas ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F13/08B01F15/04B01F3/02B01F23/10
Inventor 刘刚张小沁储德韧薛晓康
Owner SHANGHAI TIANKE CHEM INSPECTION