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Flow constant device and use method thereof, and rapid analysis instrument and detection method thereof

A constant flow and regulating device technology, applied in the field of environmental analysis, can solve problems such as inaccurate air pump output and pressure sensor interference, and achieve the effects of saving labor costs, avoiding interference, and simple structure

Active Publication Date: 2019-01-08
LIHE TECH (HUNAN) CO LTD
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Problems solved by technology

[0004] The invention provides a constant flow device and its use method, a rapid analysis instrument and its detection method, in order to solve the technical problem that the water vapor carried by the wet or high water content gas interferes with the pressure sensor, resulting in inaccurate output gas volume of the air pump

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  • Flow constant device and use method thereof, and rapid analysis instrument and detection method thereof
  • Flow constant device and use method thereof, and rapid analysis instrument and detection method thereof

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Embodiment Construction

[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] figure 1 It is a schematic diagram of a flow constant device in a preferred embodiment of the present invention; figure 2 It is a schematic diagram of a constant flow device containing a circulation channel in a preferred embodiment of the present invention.

[0031] Such as figure 1As shown, the constant flow device of this embodiment includes an air guide channel 2 and an air pump 5, the air guide channel 2 is used to introduce external air, the air pump 5 can be driven into the air guide channel 2, and the air guide channel 2 is provided with a pressure The sensor 3, the pressure sensor 3 is used to detect the pressure of the gas in the inner cavity of the air guide channel 2, and...

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Abstract

The invention discloses a flow constant device and a use method thereof, and a rapid analysis instrument and a detection method thereof. The flow constant device comprises an air guide channel and anair pump; the air guide channel is used for introducing external gas; the air pump is connected to the air guide channel in a drivable way; the air guide channel is provided with a pressure sensor; the pressure sensor is used for detecting the pressure of inner cavity gas of the air guide channel; a first regulating device is arranged between the pressure sensor and air pump driving connection; the first regulating device is used for controlling the on / off of the air guide channel; an output end of the air pump is connected with a connecting channel; an output end of the connecting channel isprovided with a gas-liquid mixing device; and the gas-liquid mixing device is used for receiving gas output by the air pump. According to the flow constant device provided by the invention, non-contact design is adopted for the pressure sensor and to-be-measured gas, so that the interference of the to-be-measured gas on the pressure sensor is effectively avoided, and the air pump outputs constantgas quantity.

Description

technical field [0001] The invention relates to the field of environmental analysis, in particular, to a flow constant device and its usage method. In addition, the present invention also relates to a rapid analysis instrument comprising the above-mentioned flow constant device and a detection method thereof. Background technique [0002] Environmental online analysis detects some components in the sample, and it is necessary to separate the components to be tested from the matrix (water body) and detect them in gaseous form. During the detection process, the size of the gas volume directly affects the separation efficiency and separation time of the components to be tested, so the gas volume must be a constant flow. Constant flow measures mainly include constant pressure and constant flow. The manual flow measurement adopts the flow measurement device mainly based on the rotameter; the automatic flow measurement adopts the measurement device converted into the flow by mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D7/06G01N33/00
CPCG05D7/0617G01N33/0009
Inventor 陈阳郭艳李安强程志
Owner LIHE TECH (HUNAN) CO LTD
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