On Hai Mailun Gas Flowmeter

I. Overview LUY series gas meter factory is designed and developed with the leading domestic level of new gas flow meter. Is the use of a fluid vortex precession phenomenon, the use of piezoelectric crystal as the sensing element, combined with computer technology designed. The technology to fill the gap, to the domestic advanced level of similar products, the product has passed the provincial identification of new products. Our products are widely used in petroleum, chemical, power, metallurgy, city gas and other industries to measure the flow of gases, is oil and city gas distribution measurement and trade measurement of choice. Second, product characteristics ● no mechanical moving parts, corrosion resistance, stable and reliable, long life, long-term operation without maintenance; ● the use of advanced computer chips, high integration, small size, good performance, overall functions; ● using special display, display more digits can display work state volume flow, volume flow under standard conditions, the total amount, as well as media pressure, temperature and other parameters directly. ● using EEPROM technology, the convenience of parameter settings, and save 400 groups of traffic data; ● pulse, analog output, and has a RS485 interface; ● dedicated MODEM, enables centralized management of remote computer via the telephone network. LUY-BII smart meter set meter, microcomputer, pressure, temperature sensors in one, with built-in structure, the structure is more compact and can be directly measured fluid flow, pressure and temperature and automatically compensate for real-time tracking and compression factor correction ; LUY-BIIS double-detection technology to effectively improve the signal strength detection, the success rate is suppressed interference by pipeline vibration. Third, the working principle of the flow sensor housing section profile similar to the venturi-type line, two big middle small, there is a set of guide vanes force a vortex within the constriction of the inlet side, the outlet side of a rectifier to eliminate vortex flow the gate, so that axial flow of fluid recovery. When the incoming flow of fluid flow sensors, guide vane at the entrance of the fluid flowing in the rotation axial force, and the acceleration due to constriction in the flow of the fluid so that the center of the swirling flow of a vortex flow. Then, with the narrow tube section, focused on the central axis of the vortex flow, when the fluid enters the vortex diffuser, due to the flow rate slowed by the effect of the rotating fluid reflux, begin to make the second rotation, vortex flow turning points (in This is the axial velocity of the fluid component is zero), the formation of vortex precession phenomenon, so called precession vortex. After detecting element measured the precession frequency of the signal from the secondary instrument shows the total flow, temperature, pressure, etc. Fourth, the technical parameters No. Project key performance indicators of a nominal diameter DN (mm) 25 32 50 80 100 150 200 2 flow range (m3 / h) 1.2 ~ 10 2 ~ 25 4 ~ 60 10 ~ 150 30 ~ 450 60 ~ 900 135 to 2000 from 240 to 36003 accuracy class 1.0; 1.5 (corresponding basic error limit of ± 1.0%; ± 1.5%) 4 Repeatability (%) 2.5MPa) 11 12 Medium Gas Environmental Conditions Temperature: - 30 ℃ ~ 55 ℃ Humidity: 5% ~ 95% Atmospheric pressure: 86 kPa ~ 106kPa 13 common type of power supply and power consumption within the power supply 3VDC <80μA external power supply 6 ~ 24V DC power <20mA intelligent (pressure-temperature one technology) within 3.6VDC power supply <200μA outside 12 ~ 24V DC power supply <100mA 14 explosion proof grade mark: ExdⅡBT4; ExibⅡBT6 (LUY-B1) 15 Executive Standard Product Standard: Q / FM 01-2002 "LUY series spin into the vortex flowmeter "verification procedures: JJG 198-1994" velocity flowmeter test procedures "V. Product Selection Code caliber flow range m3 / h LUY-25 DN25 2.5 ~ 30 LUY-32 DN32 4.5 ~ 60 LUY-50 DN50 10 ~ 150 LUY-80 DN80 28 ~ 400 LUY-100 DN100 50 ~ 800 LUY-150 DN150 150 ~ 2250 LUY-200 DN200 360 ~ 3600 code Function 1 N Y no temperature and pressure compensation with temperature and pressure compensation code output Model F1 4-20mA output (two-wire) F2 4-20mA output (three-wire) F3 RS485 communication interface code Function 2 E1 1.0 级 E2 1.5 级 T at room temperature P1 1.6Mpa P2 2.5Mpa P3 4.0Mpa D1 internal 3.6V power supply D2 DC24V B1 B2 stainless steel aluminum