Summary 1:
Brief introduction:
LUXZ type series intelligent precession vortex flowmeter is my company developed new gas flow meter has the domestic leading level. Due to the uniqueness of vortex precession flowmeter, make it in the process of development must constantly adapt to the development of mechanical manufacturing level, so the precession vortex flowmeter based on the measured object is different, divided into "intelligent vortex precession flowmeter" and "steam" precession vortex flowmeter. 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. Of vortex precession flowmeter consisting of sensors and switches.
precession 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.
Main application:
LUXZ type series intelligent precession vortex flowmeter can be widely used in petroleum, chemical, electric power, metallurgy, for the city
Gas industry such as measurement of gas flow, oil field and urban gas distribution measurement and trade measurement of the preferred products.
Summary 2:
Product main features:
1, no mechanical moving parts, not easy corrosion, stable and reliable, long life, long running without special maintenance;
2, using 16-bit single chip, high integration, small size, good performance, the whole machine function is strong;
3, intelligent flowmeter flow sensor, microprocessor, pressure and temperature sensor, adopt built-in combination, make the structure more compact, can directly measure the fluid flow, pressure and temperature, and automatic tracking compensation and real-time compression factor correction;
4, the double detection technology can effectively improve the detection signal strength, and restrain the disturbance caused by pipeline vibration.
5, with domestic leading intelligent seismic technology, effectively suppress the vibration and pressure fluctuation caused by the interference signal;
6, using Chinese characters dot matrix display screen, display digits, more reading is 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;
7, using EEPROM technology, convenient parameter Settings, can be permanent, and can save up to a year of historical data;
8, converter can output pulse frequency, 4 ~ 20 ma signals, with RS485 interface, can be directly with the computer networking, transmission distance of 1.2 km;
9, much physical parameter alarm output, can choose any one of them by the user;
10 meter, flowmeter can rotate 360 degrees, installation is simple to use convenient;
11, cooperate with our company FM type data collector, can through the Internet or telephone network for remote data transmission;
12 the sensor input, pressure, temperature signal, strong interchangeability;
13, low power consumption, can be used in batteries, also can be an external power supply.
Summary 3:
Vortex precession flowmeter (figure 1)
Flow meter by the following seven basic parts (figure 1) :
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. Smart principle (see figure 3) flow totalizer.especially
By the temperature, pressure testing 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, 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.
Working principle:
Of the flow profile of the flow sensor similar type line of venturi tube. At the entrance side put a set of spiral vane, when fluid into the flow sensor, guide vane forcing fluid produced dramatic spiral flow. When fluid into the diffuser, vortex flow under the effect of reflux, began as a secondary rotation, form the gyro type vortex precession phenomenon. The precession frequency is proportional to the flow size, not influenced by physical properties and fluid density, detecting quadratic spin precession frequency measured fluid can be wide flow rate range for good linearity. Signal amplified by preamplifier, filter, converting plastic is proportional to the velocity of the pulse signal, and then with the detected signals, such as temperature, pressure are sent to the microprocessor for integrating process, the final measurement results on the LCD screen shows (instantaneous flow and cumulative flow, pressure and temperature data).
Work flow totalizer.especially principle:
Temperature and pressure detection by flow totalizer.especially channel, the flow sensor and microprocessor units, and is equipped with output signal interface, the output signals. Flowmeter microprocessor according to the gas equation of temperature compensation, and automatically compress factor correction, gas equation is as follows:
.........................（2）
Type:
QN - standard under the condition of volume flow (m3 / h);
QV - conditions of volume flow (m3 / h.
Pa - local atmospheric pressure (KPa);
P - meter take pressure hole measurement gauge pressure (KPa);
PN - standard conditions of atmospheric pressure (101.325 KPa);
TN - standard conditions of absolute temperature (293.15 K);
T - the current body of absolute temperature (K);
Zinc - the compressibility of gas under the standard condition;
Z - the compressibility of gas in working conditions;
Note: when using bell or negative pressure calibration take zinc/Z = 1, gas (zinc/Z) = 1/2 FZ for compression factor. According to the standard of China petroleum and natural gas corporation formula of SY/T6143-1996.
Summary 4:
Main technical parameters and features:
3.1 meter specification, basic parameters and performance index (see chart 1)
(table 1).
Note: 1. Accuracy: as temperature, pressure, the revised system accuracy;
2. A and B to same size difference between different flow range.
3.2 standard conditions: P = 101.325 KPa, T = 293.15 K
3.3 conditions of use:
Ambient temperature: - 30 ℃ ~ + 65 ℃
Relative humidity: 5% ~ 95%
Medium temperature: - 20 ℃ ~ + 80 ℃
The atmospheric pressure: 86 kpa to 106 kpa
3.4 electrical performance metrics
3.4.1 track working power supply:
A. outside power supply: + 24 VDC plus or minus 15%, ripple < 5%, suitable for 4 ~ 20 ma output, pulse output, alarm output, RS - 485, etc;
B. within power: 1 set of 3.6 V lithium battery (ER26500), when the voltage is lower than 3.0 V, the under-voltage directives.
3.4.2 machine power consumption:
A. external power: < 2 w.
B. within the power supply: the average power consumption of 1 mw, can use continuously for more than two years.
Rule 3.4.3 pulse output mode:
A. working condition of pulse signal, directly to the flow sensor detect the working condition of the pulse signal through optical coupling isolation amplifier output, high level 20 v, or low level 1 v or less;
B. calibration pulse signal, and form a complete set of valve controller IC card, high level of 2.8 V or higher, low level of 0.2 V or less unit impulse on behalf of the volume flow rate can be set range: 0.001 m3 ~ 100 m3. Single choice must pay attention to: when the value calibration pulse signal frequency should be 900 hz or less.
C. calibration pulse signal, the optical coupling isolation amplifier output, high level 20 v, or low level 1 v or less.
3.4.4 (photoelectric isolation) RS - 485 communication, which can realize the following functions:
The RS - 485 interface, can connect directly to a PC or secondary table, remote transmission showed that the temperature of the medium, pressure and the temperature and pressure compensation after standard volume flow rate and total volume;
3.4.5 4 ~ 20 ma standard current signal (photoelectric isolation)
Is proportional to the standard volume flow, 4 mA for m3 / h, 0 to 20 mA, corresponding to maximum standard volume flow (this value can be set in the primary menu) and formats: two wire system or three wire system, flow meter can be according to the current module automatically identify, and correct the output.
3.4.6 control signal output:
A. lower limit alarm signal (LP) : photoelectric isolation, high and low level alarm, alarm level can be set, working voltage 24 v, + 12 v ~ + 50 ma, maximum load current;
B. limit alarm (UP) : photoelectric isolation, high and low level alarm, the alarm level can be set, working voltage 24 v, + 12 v ~ + 50 ma, maximum load current;
C. valve alarm output (BC side, the IC card control device) : logic gate output, normal output low level, the range of 0.2 V or less; Alarm output high level, 2.8 V or higher, load resistance 100 k or higher Ω;
D. battery under-voltage alarm output (BL, IC card control device) : logic gate output, normal output low level, the range of 0.2 V or less; Alarm output high level, 2.8 V or higher, load resistance 100 k or higher Ω;
3.5 explosion-proof marks: ExdIIBT4
3.6 protection grade: IP65
3.7 the pressure loss
Flowmeter actual pressure loss calculation formula is as follows:
.........................（1）
Type:
Δ P1 - meter actual pressure loss (KPa);
Rho - measured medium density (kg/m3)
Δ P - medium to dry air flow meter of pressure loss (KPa), its characteristic curve as below
3.10 wiring: outlet interface for M20 thread within x 1.5.
