T: +86-577-59970799
E: wpt0125978@163.com
E: wpt0125978@163.com
No.17 Binhai 3rd Road, Yongxing Street, Longwan District, Wenzhou City, Zhejiang Province
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Overview
WU series gas ultrasonic flowmeter is a new flowmeter based on ultrasonic time difference method to measure the flow rate. It adopts four-channel design, which can effectively reduce the influence of eddy current and asymmetric flow, and improve the measurement accuracy and reliability. The product integrates flow measurement and volume correction, and can directly measure the volume flow, temperature, pressure, volume flow and total amount under gas measurement conditions (referred to as "working conditions"). According to needs, it can also add the Internet of Things communication and system platform prepaid settlement function, which is an ideal instrument for urban gas trade measurement and industrial gas measurement in petrochemical, metallurgy, electric power and other industries.
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Qualifications
WU series gas ultrasonic flowmeter is a new flowmeter based on ultrasonic time difference method to measure the flow rate, using the patented technology of "ultrasonic signal adjustment technology and method" to design, using a unique multi-channel detactable zero pressure loss metering core structure, media adaptability, high intelligence, low power consumption, with multi-parameter self-diagnosis and self-calibration function, powerful, Superior metering performance. This product implements the national JJG1030-2007 "Ultrasonic flowmeter verification Regulations" and product enterprise standards.
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Characteristics
Ultrasonic base meter part：
Two-to-three-section four-channel layout, with eddy current and asymmetric flow detection and compensation functions.
With a variety of self-diagnosis and self-correction functions.
Independent metering core structure design, easy to maintain and improve product reliability and service life.
Wide range, ≥100:1(DN25～DN40)160:1(DN50～DN200).
The starting flow rate is low, and the lower limit of the measurable flow rate is not more than 15mm/s. With zero self-tracking function, can effectively eliminate zero drift.
Four-channel redundant design, part of the channel fault can ensure the basic accuracy of measurement, high reliability.
Straight through measuring tube design, zero pressure loss.
Corrector part：
UART communication mode is adopted between the volume correction instrument and the ultrasonic base instrument to ensure that the data of the base instrument and the correction instrument are completely synchronized, and the main state diagnosis information of the base instrument can be collected and the alarm can be displayed.
Volume correction instrument adopts full digital design, high conversion accuracy, and has perfect data management ability.
The Internet of Things communication module and correction instrument adopt a unique structural design, and the Internet of Things module design is standardized, 2G, 4G, NB can be directly interchangeable upgrade.
Adopt a variety of electromagnetic compatibility design technology, strong anti-interference ability.
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Structure and Principle
Structure
The flowmeter is mainly composed of a housing, a metering core assembly, an ultrasonic metering plate assembly, a support and a volume correction instrument, as shown in the structure diagram below.
FIG.1 Structural diagram
FIG.2 Mechanical diagram
The main functions of each part are as follows:
Housing: bearing and installing metering core assembly.
Metering core component: install transducer, ensure sound channel size stability, provide measurement pipeline.
Ultrasonic measuring plate component: ultrasonic excitation and signal processing, gas flow rate detection and flow calculation, information and correction instrument exchange.
Bracket: the metering plate assembly is provided to mount the chamber and support the corrector.
Volume corrector: read the ultrasonic metering board detection data, convert the working flow and volume to the standard flow and volume, and achieve other additional functions.
Four-channel structure and measurement principle
The four-channel design can detect eddy current and asymmetric flow and reduce its influence. It has the characteristics of good anti-noise performance and accurate measurement. At the same time, part of the channel detection failure can still work normally, which can improve the reliability of measurement.
Mean velocity:
In the formula: vi and wi are the flow rate and weight coefficient of the i channel. i=1, 4.
FIG.3 Schematic diagram of channel structure
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Technical Performance index
Mechanical performance index:
Table 1 Basic parameter
Type specification | Nominal diameter (DN) mm | Flow range m³/h | Starting flow m³/h | Medium maximum pressure(MPa.a) /Nominal pressure(MPa.g) |
WU-G25 | 25 | 0.4～40 | 0.10 | 1.6/1.6 |
WU-G40 | 32 | 0.6～65 | 0.12 | |
WU-G65 | 40 | 1.0～100 | 0.14 | |
WU-G100 | 50 | 1.0～160 | 0.20 | |
WU-G250 | 80 | 2.5～400 | 0.40 | |
WU-G400 | 100 | 4.0～650 | 0.65 | |
WU-G1000 | 150 | 10～1600 | 1.60 | |
WU-G1600 | 200 | 16～2500 | 2.0 | |
| WU-G2500 | 250 | 40～4000 | 5.0 | |
Note: The minimum operating pressure of WU-G2500 shall not be less than or equal to 0.5MPa. | ||||
Technical parameter:
Table 2 Technical parameter
Serial number | Designation | Technical parameter |
| 1 | Conditions of use | Ambient temperature: -25℃～+55℃. Medium temperature: -20℃～+60℃. Relative humidity: 5%～95%. Atmospheric pressure: 70 kPa～106 kPa. Mechanical vibration: there should be no strong mechanical vibration occasions Electromagnetic and electronic interference: there is no strong electromagnetic and electronic interference environment. Acoustic interference: ambient acoustic noise has no adverse effect on its measurement performance. Pulsating flow: does not affect its metering performance. Measuring media: natural gas, compressed air, nitrogen and industrial inert gases. |
| 2 | Accuracy level | Level 1.0 |
| 3 | Operating power supply | Metering battery: a set of 3.6V DC lithium battery pack. Internet of Things module communication battery: a set of 3.6Vdc lithium batteries. External power supply 1: 8～28V DC, pulse output, RS485 output,4～20mA current output, power consumption ≤1W. External power supply 2: 5V DC dedicated safe power supply, power consumption ≤1W, for Internet of Things communication (built-in security grid, can not be replaced with other external power supply). |
| 4 | Output signal | Working condition pulse signal. Equivalent pulse signal. RS485 output signal. 2-wire 4～20mA current output. |
| 5 | Self-diagnosis and alarm output | Self-diagnosis content: Gain exceeds the upper limit [>67db(G25～G100), >72db(G250/G400), 75db(G1000 and above)], signal amplitude exceeds the limit, sound channel detection failure, effective measurement percentage, measurement parameter modification, temperature and pressure sensor failure, main battery undervoltage, correction instrument turned on, etc. |
| 6 | Data recording and query | Historical data records: 4320 hourly records, 600 daily records, 1000 interval records, 1000 start-stop records. The record contents include: date and time, temperature, pressure, working condition and standard condition flow, total working condition and standard condition, conversion coefficient, status word and alarm word. Historical data records can be queried through external power supply RS485 or Bluetooth communication. |
| 7 | Internet of things communication | The Internet of Things module adopts standardized design, 2G, 4G, NB optional, and can be directly upgraded and exchanged. |
| 8 | Explosion-proof level | Ex ib IIB T4 Gb |
| 9 | Protection level | IP65 |
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Overall Dimensions and Installations
FIG.4 External dimensions
Table 3 Dimensions data
Size type | D1 | D2 | n×M | L | H |
DN25 | 115 | 85 | 4×M12 | 150 | 300 |
| DN32 | 140 | 100 | 4×M16 | 150 | 300 |
| DN40 | 150 | 110 | 4×M16 | 150 | 310 |
| DN50 | 165 | 125 | 4×M16 | 150 | 310 |
| DN80 | 200 | 160 | 8×M16 | 240 | 330 |
| DN100 | 220 | 180 | 8×M16 | 300 | 360 |
| DN150 | 280 | 240 | 8×M20 | 450 | 380 |
| DN200 | 340 | 295 | 12×M20 | 600 | 400 |
| DN250 | 405 | 355 | 12×M24 | 375 | 435 |
Note: 'L' length can be customized. | |||||
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Order Instructions
When ordering this product, the user should correctly provide the nominal diameter, nominal pressure, the maximum pressure of the medium.
When ordering, the correct functional configuration should be selected according to the functional requirements and filled in correctly in the following format.
FIG.5 Ordering information
