DN25 gas ultrasonic instrumentmain purpose

ASThe type of gas ultrasonic flowmeter isInstruments for accurately measuring gas flow in closed pipelines.

It has two ultrasonic measurement channels, which can accurately measure the gas medium (especially natural gas and urban gas) in the transmission pipeline. The flowmeter receives ultrasonic signals from paired transducers and processes, displays, stores and records the measurement results through a signal processing unit composed of a signal acquisition circuit and a microcontroller. It also hasRS485serial portcommunication(supportMODBUSagreement)The interface can be used to set parameters and perform other operations on the flowmeter through the upper computer software. The flowmeter has a pulse output signal function, which can be used for flowmeter calibration and connectionICCard controller.

DN25 gas ultrasonic instrumentSuitable occasions

ASThe gas ultrasonic flowmeter is suitable for accurate and reliable trade settlement measurement of low pressure, small flow, and high-quality natural gas downstream of urban gas; Gas metering, especially suitable for various industrial, small industrial, commercial, and catering service users, is the key to the transformation of urban gas towards intelligent management.

DN25 gas ultrasonic instrumentProduct Features

（1）Can accurately measure the unidirectional flow rate of gas under medium and low pressure conditions, with a wide measurement range and a large range ratio.

（2）No starting flow rate, capable of measuring the flow rate of steady-state and pulsating gases;

（3）Using the principle of ultrasonic propagation time difference method, the flow velocity of gas is directly measured, and the measurement accuracy is not affected by changes in the composition of the medium;

（4）Unrestricted flow mechanical components with minimal pressure loss;

（5）High measurement accuracy and good repeatability;

（6）adoptSingle and DoubleThe measurement of sound channels effectively reduces the uncertainty of measurement results caused by uneven flow field distribution, thereby improving the stability and reliability of instruments;

（7）The signal processing unit can effectively collect signals of gas temperature and pressure in the pipeline through corresponding sensors, and combine them with the curve fitting calculation of compression factor to finally obtain the instantaneous flow rate under standard conditions.

DN25 gas ultrasonic instrumentSystem Composition

ASThe ultrasonic flowmeter is mainly composed of a bodyUltrasonic transducerIntelligent integratorComposed of three parts.

2.1 Table Body

The body is the measuring channel through which the measured gas flows, and is designed to comply with the relevant requirements of gas pipeline engineering design specifications. It is generally made by casting or forging, heat treatment, and mechanical processing. Meet technical requirements such as temperature, pressure, maximum design flow rate, and ambient temperature for gas transportation.

The table body is designed with2To ensure the reliable installation of the ultrasonic transducer, a direct and reflective acoustic channel layout is adopted in spatial distribution, and multi-point sampling is used to effectively solve the influence of uncertain medium fluids such as flow field distortion, turbulence, vortex flow, etc. in the pipeline on the accuracy of gas ultrasonic measurement

2.2 Ultrasonic transducers

Ultrasonic transducers areConvert sound energy into electrical signalsorA component that converts electrical signals into sound energy.Paired ultrasonic transducers are installed on the transducer mounting base of the body, generating electrical pulse signals to drive the transmitting transducer to produce ultrasonic waves. The paired transducer receives the ultrasonic signals and converts them into electrical signals. The quality of the transducer directly affects the safety, accuracy, and stability of the entire measurement system.

2.3Intelligent integrator

Intelligent integratorIt is an important component of the ultrasonic flowmeter measurement system, responsible for driving the transducer, amplifying the ultrasonic signal, filtering and processing it, measuring the forward and reverse time of ultrasonic propagation in the pipeline, calculating the gas flow rate in the pipeline based on the forward and reverse time difference, and then calculating the working condition flow rate or standard condition flow rate of the gas, displaying the measurement results or transmitting them to the upper computer through the communication port for remote monitoring, and saving the measurement data for users to download.

2.4. Pressure sensors and temperature sensors

Used to detect the pressure and temperature of gases, these measured values participate in the compensation calculation of standard flow rate.

2.5 System supporting accessories

2.5.1Noise reduction stabilizer

To adapt to the working conditions of gas ultrasonic flow meters in noisy environments such as urban gas pressure regulation, our company has provided corresponding noise reduction equipmentstableFlow generator. Install the noise reduction stabilizer between the noise interference source and the flow meter according to the source of the noise.