Type CL-1-4 Gas Ultrasonic Flowmeter
The domestic high-precision four-channel ultrasonic flowmeter fills the gap in natural gas trade measurement.
Type
Tags
Solution maturity
Mass promotion / Mass production
Applicable industry
Applications
Key innovations
Fill the domestic gap and develop a four-channel high-precision digital ultrasonic gas flowmeter. Innovative algorithms, adaptive electronics, and unique sealing design improve metering accuracy and reliability, and realize autonomous natural gas trade settlement in high-pressure long-distance pipeline networks.
Potential economic benefits
This product breaks foreign monopolies, fills domestic gaps, and achieves import substitution. Its high precision, high reliability and no pressure loss characteristics can significantly reduce operating costs, improve the measurement accuracy of natural gas trade, and avoid economic losses. A total of 46.184 million yuan in benefits and 1,456.
Potential climate benefits
This high-precision ultrasonic flowmeter improves the accuracy of natural gas metering, effectively reduces "unmetered" gases in the transmission link, and directly reduces methane leakage (strong greenhouse gas) emissions. The resistance-free design reduces pressure loss in the gas transmission pipe network, thereby reducing the operating energy consumption of the compression station and related carbon emissions.
Solution supplier
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Shanghai CNNC Weisi Instruments
Shanghai CNNVS focuses on the research and development and manufacturing of industrial automation instruments, providing core measurement and control solutions for petrochemical, power and other industries.
Shanghai，China
Solution details
- Technical field and background
- Technical field: Belonging to other technologies in the "Technical Field" catalog.
- Project background
Since my country began to implement the huge clean energy project of the "West-East Gas Pipeline" and made gas ultrasonic flowmeters the first choice for flow measurement, a large number of gas ultrasonic flowmeters have been used on the main gas transmission line. However, this key equipment has always been monopolized by foreign brands.
Based on this situation, this project successfully develops a new four-channel high-precision digital ultrasonic gas flowmeter aiming at the requirements of high precision, high pressure, high reliability, online self-diagnosis and possible quantity measurement required in the trade settlement of high-pressure long-distance natural gas pipeline at home and abroad, filling the blank of gas ultrasonic flowmeter products for natural gas trade measurement of high-pressure long-distance natural gas pipeline in China. - Main research contents
The product of this project is specially designed for the application demand of trade settlement of high-pressure natural gas long-distance pipeline at home and abroad. We have designed four ultrasonic measurement channels distributed in parallel with the surface optimized according to the weight of the flow field area, which can more accurately reproduce the flow field distribution in the pipeline, reduce the failure rate and improve reliability. The original time-difference algorithm formula has been improved for online velocity measurement, the concept of unequal sound paths in the forward and backward directions in machinery has been introduced, and software algorithm modifications have been made to further improve the accuracy of linear velocity measurement and calculation. The linear flow rates of the four sound channels are synthesized according to the distribution law by the flow field area weights to obtain the surface flow rate in the pipe. The surface flow rate is multiplied by the cross-section to calculate the instantaneous flow rate in the pipe. The instantaneous flow rate is verified by real flow and corrected by zeroing. More accurate instantaneous flow rate, and then combined with real-time collected temperature and pressure data, as well as gas composition data, to calculate the standard volume instantaneous flow rate, which can be further accumulated into the standard flow rate. At the same time, the energy flow rate can be calculated based on the composition and the combustion value of each gas. - Key innovation points
a. Add more sound channel designs;b. Improve the original time difference algorithm formula, introduce the concept of unequal mechanical sound paths between forward and backward directions, and update the software algorithm;c. Use a programmable amplifier composed of a digital potentiometer in the ultrasonic pre-processing to achieve adaptive processing of pressure changes;d. The ultrasonic transmitting and receiving circuit adopts temperature and pressure adaptive double closed-loop automatic gain control and other technologies to improve the signal-to-noise ratio of the signal, sound time measurement accuracy and anti-interference ability; e. Adopt a self-invented method to measure acoustic delay, which eliminates various delay errors to the greatest extent;f. Unique transducer sealing and mechanism processing design adapt to high pressure and high flow rate working conditions. - Technical and economic indicators
- Technical indicators: a. Measurement accuracy: 0.5 level;b. Range ratio: maximum 1:100;c. Large measuring aperture: from DN65 to DN400;d. Resolution: <1mm/s;e. Response time: <1s;f. No resistance parts, no pressure loss;g. Working pressure range (MPa): 0~16;h. Flow data under working conditions or standard conditions can be displayed on site, without relying on the flow totalizer.
- Economic indicators: As of the end of 15 (the past three years), the products have generated a cumulative self-transformation benefit of 46.184 million yuan, a net profit of 14.563 million yuan, and a paid tax of 3.144 million yuan.
- Intellectual property rights, etc.
This project has obtained 1 invention patent authorization, 4 utility model authorizations, 1 appearance patent authorization and 1 software copyright registration. The product passed the test of "Shanghai Instrument and Instrument Automatic Control System Inspection and Testing Institute" and obtained the People's Republic of China manufacturing measuring instruments license. - Economic and social benefits and their role in scientific and technological progress
Because ultrasonic flowmeters have the characteristics of high accuracy, stable and reliable performance, large range ratio, and no testing parts in pipelines, in engineering applications and international trade, they are rapidly developing into the field of flow measurement, especially the first choice for measuring hydrocarbons. Under the influence of projects such as the West-East Gas Pipeline, the products of this project have been widely used in various major domestic natural gas trade metering occasions, making an important contribution to comprehensively improving the support capabilities of my country's oil and gas pipeline equipment.
Last updated
01:01:04, Nov 08, 2025
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