Summary 1:
LUGB type vortex flowmeter is according to the principle of Carmen (Karman vortex street measuring gas, steam or the volume of liquid flow, the volume of the standard condition or volume flow to mass flow meter. And can be used as flow transducer is applied to automatic control system.Vortex flowmeter can be divided according to function name gas flow meter,flue gas meter,steam flow meter,gas flow meter,compressed air flow meter,liquid flow meter.
The instrument adopts the advanced differential technology, cooperate the measures such as isolation, shielding, filtering, overcome the similar products such problems as poor vibration resistance, small signal data disorders, using a unique sensor encapsulation technology and protective measures, to ensure the reliability of the product. Products are both basic and compound type, basic measuring single traffic signal; Compound can be realized at the same time temperature, pressure, flow rate measurement. Each type has overall, fission structure, in order to adapt to different installation environment.
Vortex flowmeter classification: LUCB series plug-in vortex flowmeter, LUCB series of vortex flowmeter is mainly used for industrial piping medium fluid flow measurement, such as gas, liquid and vapor, and other media. Is characterized by small pressure loss, wide range, high precision, working condition of the measurement volume flow is almost not affected by the fluid density, the influence of the parameters such as pressure, temperature, viscosity. No moving mechanical parts, so high reliability, small amount of maintenance. Instrument parameters can be long-term stability. Vortex street flowmeter using piezoelectric stress sensor, high reliability, can be in - 20 ℃ ~ + 250 ℃ temperature range. There are standard signal simulation and digital pulse signal output, easy with the computer and digital systems, is a more advanced, the ideal flow meter.
Summary 2:
Unique features:
1, simple structure, no sports wear parts.
2, high measurement precision, high reliability, no need to the scene debugging.
3, long-distance traffic signals, and computer networking, realize the centralized management.
4, amplified board adopts unique design, gas, liquid.
Technical indicators:
1, accuracy level: 1.0 1.5
2, nominal pressure: 1.6 MPa, 2.5 MPa, 4.0 MPa and above
3, the temperature measured medium: - 40 ℃ to 350 ℃
4, the pressure loss: drag coefficient CD 2.4 or less
5, power supply: 12 to 24 VDC
6, explosion-proof level: la II CT6 explosion-proof)
7, the output signal: low voltage pulse level 1 v or less, high level 6 or higher v, standard 4-20 ma current signal
Summary 3:
Set in the fluid type triangular prism spiral body, from body side alternately vortex taking place with the rules of the vortex, the vortex is called the karman vortex, downstream asymmetric vortex column in spiral body is arranged.
Vortex flowmeter is by the design in the flow field in the vortex body, detection probe and the corresponding electronic circuit, etc. When the fluid flows through the spiral body occurs, it is formed on both sides of the two rows of vortex variations, this vortex is known as the karman vortex street. Stern, on the basis of the of karman vortex street Hal and puts forward the karman vortex frequency is proportional to the velocity of the fluid, the relation between the frequency and velocity are presented:
F = St * V/d
Type: f vortex frequency (Hz)
V vortex occurred body on both sides of the average flow velocity (m/s)
St, luo hall coefficient (constant)
These variations of vortex is formed a series of variations of negative pressure, the pressure on detecting probe, and produce a series of alternating electric signals, after dealing with the preamplifier conversion, plastic, amplification, the output is proportional to the vortex synchronous pulse frequency of the signal and standard signal.
Summary 4:
Parameter requirements:
Measuring medium: gas, liquid and steam
Connection mode: flange card mounted, flange, plug-in
Diameter specifications Select 25,32,50,80,10 flange card mounted caliber
Flange connection type diameter selection 100150200
The flow measurement range of normal measuring velocity range Reynolds number 104 ~ 1.5 x 4 x 106; Gas 5 to 50 m/s; Liquid 0.5 ~ 7 m/s
Normal flow range of liquid, gas flow rate measurement range is shown in table 2; Steam flow range are shown in table 3
Measurement accuracy of 1.0 magnitude 1.0 on the Richter scale are unlikely
Temperature measured medium: normal temperature - 25 ℃ ~ 100 ℃, high temperature - 25 ℃ ~ 150 ℃ to 25 ℃ ~ 150 ℃
Output signal pulse voltage output signal high level 8 ~ 10 V low level from 0.7 V to 1.3 V
Pulse duty ratio of about 50%, the transmission distance is 100 m
Pulse current 4 ~ 20 mA remote transmission signal, transmission distance is 1000 m
Instrument: using the environment temperature 25 ℃ ~ + 55 ℃, humidity: 5 ~ 90% RH50 ℃
The material of stainless steel, aluminum alloy
Power DC24V or lithium battery 3.6 V
Explosion-proof grade The Ann model iaIIbT3 - T6, protective class IP65