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Variable volume trace gas sampling valve

A technology of trace gas and sampling valve, which is applied in measurement devices, instruments, scientific instruments, etc., can solve problems such as inability to be applied, and achieve the effects of simple structure and method, accurate quantification, and good repeatability.

Inactive Publication Date: 2012-07-18
TIANJIN XIANNQUAN IND & TRADE DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when a very small amount of sample injection is required, such as less than 5 ul, it is often not well applied

Method used

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  • Variable volume trace gas sampling valve
  • Variable volume trace gas sampling valve
  • Variable volume trace gas sampling valve

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Embodiment Construction

[0021] The specific implementation, structure, features and effects provided by the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0022] Such as Figure 1~4 A variable-volume trace gas sampling valve shown includes a fixed shell and a rotating inner core. The rotating inner core 2 is set in the fixed shell 1, and the upper center of the rotating inner core is fixed by a thread 11 to a vertical rod 9. The handle 10 is fixed on the vertical rod, and the rotating core is rotated 90 degrees in the fixed shell through the handle. The fixed shell is made of stainless steel, and the rotating core is made of resin with sealing performance. The vertical rod in the center is a stainless steel rod . There are ten holes on the side of the fixed shell, which are respectively composed of six-hole structures and four-hole structures corresponding to the positions. The side of the rotating core corresponding to ...

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Abstract

The invention relates to a variable volume trace gas sampling valve. A rotary inner core is sleeved in a fixed housing, a vertical rod is fixed on the center of the top surface of the rotary inner core through a screw thread, the vertical rod is fixedly provided with a handle, the rotary inner core can rotate 90DEG in the fixed housing through the handle, the side surface of the fixed housing, which is provided with ten holes, is composed of a six-hole structure and a four-hole structure which have corresponding positions, the side surface of the rotary inner core corresponding with the six-hole structure of the fixed housing is provided with two transverse bore structures and two vertical bore structures, and the side surface of the rotary inner core corresponding with the four-hole structure of the fixed housing is provided with three vertical bore structures. The gas sampling valve has two different connection states, and the opposite positions of the rotary inner core are utilized to realize the sample gas taking and inletting, so the trace gas sampling is realized. Different volume gas sampling amounts can be respectively realized through respectively using the six-hole part and the four-hole part of the sampling valve, and the sampling valve has the advantages of quantitative accuracy, simple structure and method, and good repeatability.

Description

technical field [0001] The invention belongs to the field of sampling valves, and relates to a variable-volume trace gas sampling valve, especially suitable for sampling systems of precision instruments such as adsorption instruments and chromatographs. Background technique [0002] The injection valve is a key part of the sampling system of the adsorption instrument, chromatograph and other instruments. Its injection volume is a very important indicator. When the area falls within the standard curve, the result will be more accurate. Therefore, the standard injection volume is required to be consistent or not much different from the actual sample volume. However, in many cases, the actual sample volume varies greatly, such as the determination of reaction conditions. When the amount of reaction product varies within a range, the volume of the required gas sampling valve can also vary. Similarly, for the pulse injection of the adsorption instrument, the adsorption of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/20
Inventor 赵铁英
Owner TIANJIN XIANNQUAN IND & TRADE DEV
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