Metering chamber component of graphite scraper flowmeter

Abstract

The invention discloses a metering chamber component of a graphite scraper flowmeter. The metering chamber component comprises a metering chamber and a rotor assembly installed in the metering chamber. The metering chamber comprises a metering chamber cavity and also comprises an inlet and an outlet communicating with the metering chamber cavity, and the inlet and the outlet are disposed on a sidewall of the metering chamber cavity. The metering chamber cavity has a cross section in the shape of a cam profile, the rotor assembly includes a cylindrical core body in the shape of a cylinder and apair of scraper components, the scraper components are crossed in the cylindrical core body, and each of the scraper components can radially slide along the cylindrical core body in the cylindrical core body. The metering chamber component has many excellent performances such as high measurement accuracy and stable reliability.

Description

technical field [0001] The invention belongs to the technical field of scraper flowmeters, in particular to a metering chamber component of a graphite scraper flowmeter. Background technique [0002] The scraper flowmeter is a volumetric flowmeter with high measurement accuracy. At present, the metal scraper flowmeter with a cam structure is widely used. With the rise of oil prices, the measurement accuracy of the scraper flowmeter is also increasing Higher and higher, as one of the core components of metering, the metering chamber housing also requires higher and higher metering performance. The structure of the existing scraper flowmeter is generally such as the authorized announcement number "CN102721442A" and "CN2748875Y" "CN206919952U", that is, there is a metering chamber cavity similar to a cylindrical cavity, and there are respectively set on both sides of the cavity. An inlet / outlet flow channel for liquid inlet and outlet, and a metal rotor assembly composed of a ...

AI Technical Summary

Problems solved by technology

The structure of the existing scraper flowmeter is generally such as the authorized announcement number "CN102721442A" and "CN2748875Y" "CN206919952U", that is, there is a metering chamber cavity similar to a cylindrical cavity, and there are respectively set on both sides of the cavity. An inlet / outlet flow channel for liquid inlet and outlet, and a metal rotor assembly composed of a slidable metal plate located in a cylinder is provided in the metering chamber. The metering chamber components of this type of structure are traditional design structures. For the current Higher precision and more stable fuel metering is no longer applicable. For example, the inside of the metering chamber may not be effectively separated between the inlet and the outlet, causing the fuel on both sides to cross-flow and affect the metering accuracy of volumetric metering.

For scraper flowmeters such as "CN102721442A" and "CN2748875Y" and "CN206919952U", the movement of the scraper of the rotor assembly relies on a cam as a profiling model, which determines the scraper completely from the geometry of the cam. The movement track of the plate is easy to be damaged due to the wear of related components such as the cam. When the metering chamber is matched with the rotor, the contact between the inner wall of the metering chamber and the edge of the rotor scraper is difficult to maintain sealing contact all the time, resulting in the rotor scraper and the rotor scraper. The metering chamber enclosed between the walls of the metering chamber cannot be fully sealed, and there is a risk of liquid leakage affecting accuracy

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