Gas flow measuring station

Abstract

The invention discloses a gas flow measuring station. The gas flow measuring station comprises a connector and a gas flow measurer, the gas flow measurer comprises a gas flow channel, a communicated gas flow stroke device is arranged between the gas flow channel and the connector, and an ultrasonic gas flow rate unit is arranged on the gas flow channel. The gas flow stroke device comprises a conical guiding section, the large-diameter end of the guiding section is located on the connector side, and the cone top of the cone is located on the axis of the gas flow channel and penetrates through the axis of the ultrasonic gas flow rate unit. The gas flow measuring station is connected to a gas outlet of measured equipment, the gas flow stroke device guides entered gas to improve the flow speed of gas, ultrasonic measurement is achieved at the tail end of gas turbulent flow, and a pipeline is shortened under the condition that the turbulent flow influence is reduced. Rapid flow collection in a short pipeline path is achieved, and combination of two flow devices can be achieved.

Description

technical field [0001] The invention belongs to a gas flow detection device, and in particular relates to a technology including using ultrasonic waves to measure gas flow. Background technique [0002] For the measurement and calibration of the gas flow of atmospheric sampling equipment, there are currently electronic soap film flowmeters, orifice flow calibrators, and pressure flow calibrators. These calibrators are equipped with only one sensor for measurement. Measurement and calibration are performed at the sampling port, and during measurement and calibration, the sampling work of the atmospheric sampling equipment needs to be interrupted. The technology of measuring gas flow by ultrasonic waves has been widely used. For example, CN103353319A is based on the wet gas flow measurement method of straight-through gas ultrasonic flowmeter. Since the gas flow velocity distribution in the pipeline directly affects the accuracy of measurement, this patent uses a correction coe...

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Problems solved by technology

How to reduce the influence of gas flow velocity distribution on the structural setting of the pipeline This patent does not involve

CN105486363A An ultrasonic gas flow meter and its measurement method improve the measurement accuracy by setting multiple ultrasonic waves on the same side. The patent algorithm is relatively complicated, and at the same time, it does not consider how to improve the measurement accuracy from the perspective of structure setting

For the gas sampling device, due to the short gas output pipeline of the gas sampling device, the gas is disturbed greatly in the pipeline, how to realize the accurate measurement of the gas flow rate of the atmospheric sampling equipment on the short pipeline, there is no relevant literature record at present

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