『Gas phase flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Doppler flowmeter
2. What is used to determine the carrier gas flow rate in gas chromatography?
Using a soap film flowmeter to measure the flow rate of general fish, if the instrument is used normally, the flow rate set by the instrument is still quite accurate because it has been tested at the factory.. If it is an instrument with weak automation, it can be regretted or adjusted by oneself. This is usually detected using soap film flow meters. When gas chromatography was first popularized, this method was used to adjust the carrier gas flow and column flow rate. The measurement principle is that the gas flowing out from a stable gas source flows into the atmosphere through the tested flow meter, flow control valve, and soap film flow meter. The function of the flow control valve is to adjust the airflow to the required flow rate. Squeeze the rubber ball to make the soap film liquid rise to the air outlet of the soap film tube, block the air path, and the airflow blows the soap film liquid to form the Bi Yin Wu soap film. The soap film adheres to the inner wall of the soap film tube, completely cutting off the air path inside the soap film tube. The pressure difference between the import and export drives the soap film to rise uniformly along the soap film tube. When the soap film reaches the lower marking line of the soap film tube, start the stopwatch to start timing. When the soap film reaches the upper marking line of the soap film tube, stop the stopwatch to start timing. Calculate the instantaneous gas volume flow rate of the soap film tube based on the measured time and the volume between the two engraved lines of the soap film tube.
3. Structure of LNG refueling machine return _600x400.jpg)
The core structure of LNG refueling machine return air gun includes gun seat, break valve, one-way valve, flow meter, and a set of pneumatic locking and sealing system.
. 1. Basic connection and safety structure gun seat: It is the installation base of the entire return air gun, used to fix the gun body and connect it with the return air pipeline of the liquid dispenser. Pull off valve: a safety device installed between the return air hose and the return air gun. In the event of accidental pulling, it can automatically disconnect and seal both ends of the pipeline to prevent LNG leakage, which is a crucial safety component. One way valve: usually installed on the airflow pipeline to ensure that the recovered gas can only flow in one direction and prevent the medium from flowing back. For example, a third one-way valve that only allows flow to the storage tank will be installed on the third gas pipeline. 2. Measurement and execution structure gas phase mass flowmeter: used to accurately measure the mass of recovered gas. In terms of process, it is usually located at the back end of the one-way valve to ensure that the measured gas is effectively recovered. Cylinder: As a power source, it receives compressed air signals from the controller and drives the cylinder rod to perform push-pull actions, thereby controlling the opening and closing of the locking and sealing mechanism. Controller: It is the "big eye and quick brain" of the return air gun, which accurately controls the action timing and stroke of the cylinder by adjusting the pressure of compressed air and the opening and closing of branch bends. 3. Key action mechanism locking mechanism: Its core is the claw, which is installed on the housing slee
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