HQLUXZ Swirl Flow Meter

HQLUXZ Swirl Flow Meter 

The HQLUXZ series swirling vortex gas flow meter adopts the latest microprocessor technology, offering advantages such as powerful functions, wide flow range, simple operation and maintenance, and convenient installation and use.  Its main technical indicators reach the advanced level of similar products abroad. It integrates pressure and temperature detection and compensation calculations, boasting high measurement accuracy, wide flow range, no moving parts, good vibration and pulsation resistance, small size, light weight, and ease of use. The swirling vortex gas flow meter is an ideal instrument for gas metering in industries such as petroleum, chemical, power, metallurgy, and urban gas pipeline networks.

Detailed Introduction:
HQ-LUXZ Intelligent Swirling Vortex Gas Flow Meter
I. Overview of HQ-LUXZ Series Intelligent Swirling Vortex Gas Flow Meter
The HQ-LUXZ series intelligent swirling vortex gas flow meter adopts advanced microprocessor technology, offering advantages such as powerful functions, wide flow range, simple operation and maintenance, and convenient installation and use. Its main technical indicators reach the advanced level of similar products abroad. It can be widely used for metering various gases in industries such as petroleum, chemical, power, metallurgy, and coal.
1. Built-in pressure, temperature, and flow sensors, high safety performance, compact structure, and aesthetically pleasing appearance.
2. Local display of temperature, pressure, instantaneous flow, and cumulative total.
3.  Adopts advanced signal processing amplifier and unique filtering technology, effectively eliminating interference signals caused by pressure fluctuations and pipeline vibrations, greatly improving the anti-interference ability of the flow meter, and providing excellent stability at low flow rates.
4. Unique time display and real-time data storage function, ensuring that internal data is not lost under any circumstances and can be permanently saved.
5. Extremely low power consumption, can operate continuously with internal battery power, making it an ideal local display instrument without external power supply.
6. Reliable anti-theft function with password protection to prevent parameter changes.
7. The meter head can be rotated 180 degrees freely for convenient installation.
This series of products complies with the national standard JJG198-94 "Verification Regulations for Velocity-Type Flowmeters" and the enterprise standard Q/320831C S003-2007 "LUXZ Series Intelligent Swirling Vortex Gas Flow Meter". This series of products has been inspected and approved by the National Explosion-Proof Safety Supervision Station for Instruments and Meters (NEPSI), and complies with the relevant provisions of national standards GB3836.1-2000 and GB3836.2-2000. The explosion-proof marking for the flameproof type is Exd Ⅱ Bt4.

II. Structure and Working Principle of HQ-LUXZ Series Intelligent Swirl Gas Flowmeter
1. Flowmeter Structure (See Figure 1)

1. Housing  2. Vortex Generator  3. Flow Sensor  4. Pressure Sensor  5. Flow Integrator  6. Temperature Sensor  7. Flow Guide
2. Flowmeter Working Principle (See Figure 2)
When the fluid passes through the helical vortex generator, the fluid is forced to rotate violently around the center of the vortex generator, forming a vortex flow. The vortex flow accelerates and its intensity increases as it passes through the constricted section in the flow direction. When the vortex flow enters the diffusion section, under the action of the flow guide's backflow, this vortex generates a secondary rotation. The frequency of the secondary vortex is directly proportional to the flow rate. When the flowmeter is properly designed, the vortex frequency is linearly related to the flow rate over a wide range of flow rates. This frequency is detected by a piezoelectric sensor and processed by a flow integrator. The instantaneous flow rate and cumulative total flow are displayed, and a corresponding 4-20mA current signal is transmitted as output.

3. Working Principle of the Flow Totalizer (See Figure 3)
The principle block diagram of the flow totalizer is shown in Figure 3. The CPU receives pulse signals from the preamplifier and pressure and temperature signals obtained through the A/D converter. Through calculations, it ultimately determines the instantaneous flow rate, cumulative flow rate, temperature, and pressure values. These parameters are simultaneously displayed on the LCD. The flow display can show both standard flow rate and actual flow rate. The three function keys on the instrument, <SET>, <INC>, and <SHT>, can be used to set internal parameters.

III. Main Technical Parameters of HQ-LUXZ Series Intelligent Swirl Gas Flowmeter
1. Flowmeter specifications, basic parameters, and performance indicators (see Table 1)

Note: 1. The flow range listed in the table is the flow range verified during product factory inspection (at normal temperature and pressure, the medium is air, ρ=1.205 kg/m³); 2. The flow range increases with increasing pressure.
2. Standard conditions: P=101.325kPa, T=293.15K
3. Operating conditions:
Ambient temperature: -20~+60℃;
Medium temperature: -20~+80℃;
Relative humidity: 5%~95%
Atmospheric pressure: 86kPa~106kPa
4. Electrical performance indicators
Power supply: External power supply: +24VDC
Internal power supply: 3.6V lithium battery
Total power consumption: External power supply: <1W
Internal power supply: <0.3mW, lithium battery can be used for more than two years.
Output method: Pulse signal
4~20mA current signal: Corresponding flow rate 0~Qmax, the flow rate corresponding to 20mA can be set by the user.
RS485 communication: Can transmit instantaneous flow rate, cumulative flow rate, pressure and temperature parameters, time and date.
5. Explosion-proof mark: Exd II BT4
6. Protection class: IP65

IV. Dimensions and Installation of HQ-LUXZ Series Intelligent Swirl Gas Flow Meters
1. Flow meter dimensions (see Figure 4 and Table 2)

2. Flow meter installation dimensions (1.6 MPa)

3. Flow Meter Installation
(1) The flow meter should be installed according to the flow direction indicator.
(2) The flow meter can be installed horizontally, vertically, or at any angle.
(3) Requirements for upstream and downstream straight pipe sections are shown in Figure 5.

(4) Unless the measured medium contains large particles or long fibrous impurities, a filter is generally not required.
(5) The flow meter should not be subjected to strong external magnetic field interference or strong mechanical vibrations.
(6) The flow meter must be reliably grounded.

V. Selection of HQ-LUXZ Series Intelligent Swirl Gas Flow Meters
1. When selecting a flow meter, users should choose the appropriate model and specifications based on the nominal pipe pressure, maximum medium pressure, medium temperature, medium composition, flow range, and signal output requirements.
2. To optimize the flow meter's performance, the operating range should ideally be between 20% and 80% of the maximum flow rate.
3. The standard output configuration of the flow meter is a working condition pulse signal output (three-wire system). If other output functions are required, please specify them when ordering.
VI. Ordering Information for HQ-LUXZ Series Intelligent Swirl Gas Flow Meters
1. When ordering this product, users should carefully select the appropriate specifications based on the nominal pipe diameter, flow range, nominal pressure, maximum medium pressure, medium temperature range, and environmental conditions.  For use in hazardous locations, the explosion-proof rating requirements must be specified.
2. The flow meter is generally a basic model with working condition pulse output. If other accessories and output functions are required, please specify them when ordering. 3. When ordering, please fill out the following form completely and accurately.

Installation diagram