Precession vortex gas meter

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Intelligent vortex precession flowmeter is my company developed new gas flow meter has the domestic …

An overview,

Intelligent vortex precession flowmeter is my company developed new gas flow meter has the domestic leading level.The flowmeter integrating flow, temperature and pressure detection function, and can automatically compensate for temperature, pressure, compression factor, such as petroleum, chemical, electric power, metallurgy industry ideal instrument used in the measurement of gas.

Second, the product features

No mechanical moving parts, not easy corrosion, stable and reliable, long life, long running without special maintenance;

Using 16-bit single chip, high integration, small size, good performance, the whole machine function is strong;

Intelligent flowmeter flow sensor, microprocessor, pressure, temperature sensor, adopt built-in combination, make the structure more to gather together, can directly measure the fluid flow, pressure and temperature, and automatic tracking compensation and real-time compression factor correction;

The double detection technology can effectively improve the detection signal strength, and restrain the disturbance caused by pipeline vibration;

Using domestic leading intelligent seismic technology, effectively suppress the vibration and pressure fluctuations caused by the interference signal;

Using Chinese characters dot matrix display screen, display digits, more intuitive reading convenient, can be directly display the working status of traffic volume, the standard conditions, the total volume flow, parameters such as pressure, temperature and medium;

Block the EEPROM technology, convenient parameter Settings, can be permanent, and can save up to a year of historical data;

Converter can output pulse frequency, 4 ~ 20 ma analog signals, with RS485 interface, can be directly with the computer networking, transmission distance of 1.2 km;

More quantity alarm output parameters, can choose any one of them by the user;

Flow meter can rotate 360 degrees, installation is simple to use convenient;

Cooperate with our company FM type data collector, remote data transmission over the Internet or telephone network

The sensor input pressure and temperature signal, strong interchangeability.

The machine power consumption is low, can be used in batteries, also can be an external power supply.

1.2 the main purpose

Intelligent vortex precession flowmeter can be widely used in petroleum, chemical industry, electric power, metallurgy, urban gas supply measuring various gas flow rate, is the oil and natural gas distribution measurement and trade measurement of the preferred products.

Three, the structure and working principle

Flow meter by the following seven basic parts:

1. The vortex occurred

Made of aluminum alloy, with a certain Angle spiral blade, it is fixed at the front of the housing contraction, forcing fluid produced strong vortex flow.

This shell

Itself with the flange, the shape of the fluid channel and to a certain extent, according to the different working pressure and shell material can be cast aluminum alloy or stainless steel.

3. Integrating intelligent flowmeter

By the temperature, pressure testing analog channel, flow digital channels and micro processing unit, LCD driver circuit and other auxiliary circuit composition, and equipped with transmission signal interface.

4. The temperature sensor

Pt100 platinum resistance as temperature sensitive components, in a certain temperature range, the resistance value and temperature into corresponding relation.

5. Pressure sensor

With diffused silicon piezoresistive type bridge road as the sensitive element, the bridge arm resistance will happen under outside pressure is expected to change, therefore under certain excitation current, its two outputs potential difference is proportional to the pressure.

6. Piezoelectric crystal sensors

Near the shell expansion period of throat, can detect the frequency signal of vortex precession.

But disappear is investigated

Fixed in the shell outlet, its function is to eliminate vortex flow, to reduce the impact on downstream instrument performance.

2.2 working principle

Flow sensor shell profile type line of similar type of venturi tube line, two big middle small head, the side of the entrance section contains a set of compulsory contracting spiral guide vane, exit side have a rectifier gate to eliminate vortex flow, make the fluid restore axial flow.When the fluid flows into the traffic flow sensor, the entrance of the guide vane axial flow force of fluid, and within the contract period due to the acceleration of fluid flow make the center of the rotating flow vortex flow.At this time, as the narrow section of the spiral flow concentration on the center shaft, when the vortex flow into the diffuser, slows down, due to the effect of rotating fluid by circumfluence, began as a secondary rotation, vortex flow a turning point (in this fluid axial velocity component is zero), the formation of vortex precession phenomenon, therefore, called precession vortex.Detecting element after the precession frequency signal can be measured, the secondary instrument shows that the total flow, temperature, pressure, etc.