DHE-FL series ultrasonic flowmeter

The ultrasonic flowmeter developed by our company is based on the principle of "time difference method", and adopts advanced multi pulse technology, digital signal processing technology, and compensation technology to make the flow rate. The ultrasonic flowmeter developed by our company is based on the principle of "time difference method", and adopts advanced multi pulse technology, digital signal processing technology, and compensation technology to better adapt to the industrial site environment, making measurement simpler, more economical, and accurate.

working principle

The ultrasonic flowmeter adopts the principle of propagation time difference with good repeatability, and its working principle is shown in the following figure:

Working principle of time difference ultrasonic flowmeter

·Upstream sensor A and downstream sensor B are installed coaxially facing each other

·The angle θ between the axis line and the pipeline axis line

·Sensor sound distance L

·Inner diameter of pipeline d

Install one or more sets of ultrasonic sensors in the body pipe section, while measuring the arrival time of sound waves between each other. According to the principle of sound velocity and flow velocity superposition, there will be a time difference between the up and down propagation times of sound waves in each set of ultrasonic sensors. Use high-precision cross-correlation algorithms to calculate the time difference and calculate the flow rate according to the formula.

Sound wave propagation paths of sensors with different temperature types

Conventional temperature measurement

specialtemperature measurement

DHE-FL-GP segmental gas ultrasonic flowmeter

Product Overview

Gas ultrasonic flowmeter is mainly used to measure the volumetric flow rate under working conditions, and then obtain the standard volumetric flow rate based on the temperature and pressure values under working conditions. It has a wide measurement range and high measurement accuracy, and can be applied to flow velocity measurement of various gas media, such as natural gas, coalbed methane, ethylene, etc.

The DHE-FL-GP pipe section gas ultrasonic flowmeter produced by our company can be applied to the distribution of urban gas pipelines, trade measurement of urban gas under low pressure conditions for end users, and can also be used for process measurement in other industrial control and fields. At the same time, it can replace traditional mechanical flowmeters, reduce the maintenance cost of flowmeter products, improve the operational management efficiency of gas enterprises, and promote the new development of the metering industry in the urban gas field.

structural composition

The DHE-FL-GP pipe section gas ultrasonic flowmeter is mainly composed of a body (pipe section), rectifier, transducer (ultrasonic sensor), pressure sensor assembly, temperature sensor assembly, transmitter, measurement module, lithium battery pack, adapter column, etc. The specific structural composition diagram is shown in the following figure:

Main Features

The DHE-FL-GP tubular gas ultrasonic flowmeter adopts an integrated and compact design, which is easy to install and maintain on site. At the same time, the product integrates temperature and pressure sensors and has the function of a volume correction instrument, which can significantly reduce the cost of product use and maintenance.

technical advantage

Long term stability

Using ultrasonic measurement technology without any mechanical moving parts, the impact of internal pollution on measurement can be reduced tolowerMoreover, there will be no measurement deviation caused by wear and tear of mechanical movable parts;

● Wide range of flow measurement

adoptespeciallyThe layout design and special calculation model of the transducer (ultrasonic sensor) have a wide flow measurement range and a wide range ratio, up to 1:160, which can help customers achieve accurate measurement in a larger flow range;

● Can adapt to harsh working conditions

Design a dedicated built-in rectifier for turbulent flow conditions and noise interference, with low requirements for the configuration of the front and rear straight pipe sections to meet different operating conditions;

● Multi channel layout design

Adopting a dual channel arrangement with high noise resistance, it can effectively deal with eddies and asymmetric fluids, and improve the measurement accuracy of the flowmeter. At the same time, multi-channel can be used as a redundant backup, so even if some sensors are damaged, the flowmeter can still work normally, greatly improving the reliability of measurement;

Stainless steel precision cast body

The body is made of stainless steel investment casting, which has good corrosion resistance. Compared with welded body, its deformation is small and the risk of leakage is low, which can effectively improve the measurement accuracy and service life of the product.

● Operating software

Equipped with backend monitoring software, it can connect to various flow meters through the network for convenient and efficient management and data collection. The software provides many logs and auxiliary functions to help users better use flow meters

Explosion proof rating

Adopting explosion-proof structural design, performance is safe and reliable, explosion-proof mark: Exdb mb lICT6 Gb;

● Multiple signal outputs

Can meet different functional requirements on site;

● Protection level

The protection level of the flowmeter is IP66/68;

● High reliability

The secondary transmitter (header) is equipped with an auxiliary lithium battery, which can ensure the normal operation of the flowmeter in case of emergency power outage, with high reliability;

● LCD display

Accumulated flow rate, operating condition flow rate, standard condition flow rate, flow rate, temperature, pressure, battery power, etc.