Apparatus and method for calibrating lng gas dispenser verification device by mass method

Abstract

The invention discloses a device for calibrating an LNG adding machine calibrating device with the mass method. The device is characterized by comprising the LNG adding machine calibrating device. A liquid-phase inlet and a gas-phase inlet of the LNG adding machine calibrating device are connected with water sources respectively through pipes, a liquid-phase outlet and a gas-phase outlet of the LNG adding machine calibrating device are connected with corresponding containers through pipes respectively, the containers are placed on electronic balances respectively, the liquid-phase inlet is connected with the liquid-phase outlet through a liquid-phase flow meter, and the gas-phase inlet is connected with the gas-phase outlet through a gas-phase flow meter. The invention further discloses a testing method. According to the device and method, on the premise that the LNG adding machine calibrating device is not disassembled, and the flow meters are used, the LNG adding machine calibrating device can be calibrated.

Description

technical field [0001] The invention relates to a device and a method for calibrating an LNG filling machine verification device by a mass method. Background technique [0002] At present, there is no national LNG measurement standard in my country, and the corresponding verification regulations have not been issued. LNG dispensers are involved in trade settlement and are compulsory verification measuring instruments. The LNG dispenser verification device is a standard device for judging whether the LNG dispenser is qualified. In order to effectively realize the traceability of the quantity value (that is, to ensure that the LNG dispenser verification device is qualified), and at the same time calibrate it by using the mass method without dismantling the flowmeter; the LNG dispenser verification device requires It works under ultra-low temperature and pressure mode, so the interface design is very special, and the interface connection equipment is expensive. Contents of t...

AI Technical Summary

Problems solved by technology

In order to effectively realize the traceability of the quantity value (that is, to ensure that the LNG dispenser verification device is qualified), and at the same time calibrate it by using the mass method without dismantling the flowmeter; the LNG dispenser verification device requires It works in ultra-low temperature and pressure mode, so the interface design is very special, and the interface connection equipment is expensive

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