Gas positive pressure double standard meter method comparison device

By using a gas positive pressure dual standard meter comparison device, which employs a dual standard meter series comparison and a multi-channel parallel structure, combined with a cooling and gas supply system, high-precision gas flow meter calibration is achieved. This solves the problems of poor adaptability and insufficient accuracy of existing devices, and improves the accuracy and efficiency of calibration.

CN122084069APending Publication Date: 2026-05-26HANGZHOU WEIWEI INSTRUMENT CO LTD
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Patent Information

Application Number
CN202610202673.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-12
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing gas flow meter testing devices suffer from poor adaptability to operating conditions, insufficient accuracy, cumbersome operation, and high calibration uncertainty, making it difficult to meet the calibration requirements of high-precision flow meters.

Method used

The device employs a gas positive pressure dual standard meter comparison method. Through the dual standard meter series comparison design, combined with a multi-channel parallel structure and cooling system, it achieves precise control of airflow temperature and pressure. It is equipped with a gas supply system and a measurement and control system for high-precision calibration.

Benefits of technology

It achieves multi-caliber adaptation, high-precision benchmark verification, airflow temperature stability and calibration result accuracy, improves the accuracy and efficiency of flowmeter calibration, and solves the problems of poor operating condition adaptability and insufficient accuracy of existing devices.

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Abstract

The invention relates to the technical field of gas flow detection and calibration, in particular to a gas positive pressure double-standard-meter-method comparison device which comprises a closed loop with a standard through position and a detection through position. The air supply system is used for conveying air flow into the annular channel, so that the air flow circulates in the annular channel; the standard meter module is connected to the standard through position in series and used for collecting a standard gas flow value passing through the standard through position; the detected meter module is connected in series with the detection through position, and the detected meter module is detected through the air flow passing through the detection through position; wherein the standard through position comprises two standard meters with the same specification, and the two standard meters are connected in series on the standard through position and synchronously collect flow data for mutual comparison verification so as to verify the detected meter module.
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