Jing Chuan JC-LUGB type vortex flowmeter Xiamen
I. Product Overview:
Jing Chuan JC-LUGB Xiamen type vortex flowmeter is based on fluid Carmen (karman) principle and developed into a new type of meter used to measure gas, vapor or liquid flow, and as flow transmitters used in automation and control system. This series meter uses advanced differential technology, with isolation, shielding, filtering and other measures, greatly improving the earthquake resistance, to overcome the small-signal data disorders and other problems, and uses a unique sensor packaging technology and protective measures to ensure the reliability of the product. refined Xiamen Chuan JC-LUGB type vortex flowmeter is widely used in large, medium and small variety of pipes for drainage, industrial recycling, waste water treatment, oil and chemical reagents as well as compressed air, full measurement and superheated steam, gas and a variety of media traffic.
Jing Chuan JC-LUGB type vortex flowmeter Xiamen divided into common type and temperature and pressure compensation type two. Normal refers to the measurement of a single traffic signal, temperature and pressure compensation type can be achieved simultaneously measure temperature, pressure, flow rate. Each form It has split and one-piece two options to accommodate and facilitate the different installation environment.
Second, the principle:
Jing Chuan JC-LUGB Xiamen type vortex flowmeter is spread by direct contact with fluid vortex generator, detection probe and the corresponding electronic circuits and other components. When placed vertically within the fluid flow through the housing vortex generator, two in the rear side alternately produce two columns swirl (see below), this vortex is called Karman vortex. Strouhal on the basis of Karman vortex theory proposed the Karman vortex frequency is proportional to the flow rate of the fluid, and the The equation shows the relationship between frequency and velocity of:
Where: f- vortex separation frequency (HZ); U
within u- line fluid average velocity (m / s); f = `Sr
d- vortex generating body facing the flow width; (1-1.25d / D)
D- inner diameter of the sensor housing;
Sr- Strouhal number, a dimensionless number. For certain cylindrical vortex body occurs within a certain flow range is a function of the Reynolds number in the range of the normal flow can be considered constant.
From the above equation, the flow in the vortex generator welcome width d and Strouhal number Sr is known conditions, it can be determined the average velocity of the fluid in the pipe and volume flow Qv U by measuring the vortex shedding frequency
Qv = 3600`Uπ (D / 2) 2
Fluid sensor is the number of pulses per unit volume of traffic generated by n Qv sensor meter factor called K:
K = (N / m 3)
Alternating force generated by the swirl on the detection probe, so that the internal embedded piezoelectric element generates a charge frequency signal detected by the pre-conversion processing electrical amplification, the output is proportional to the volume flow of the pulse signal, or replace the standard signal output connected with flow indicator and temperature, the pressure sensor, calculates various parameters, display and cumulative like.
Third, the product features:
Jing Chuan JC-LUGB Xiamen vortex flowmeter type has the following characteristics:
Ø delicate and firm structure, no moving parts, long-term stable operation;
Ø installation is simple and flexible, easy to maintain;
Ø output signal is pulse frequency signal, high precision, zero drift;
Ø structure forms, there is ducted and plug-in, split and one-to choose from;
Ø accuracy, measurement accuracy is typically liquid is ± 1.0%, accuracy gas is ± 1.5%;
Ø Wide measurement range, at a Reynolds number of 2X10 4-7X10 6 Within the range up to 1:20;
Ø pressure loss is small, low operating costs, meaning more energy-efficient;
Ø low power consumption, battery durability, strong seismic performance;
Ø total flow can be power-down protection, protection time up to 10 years;
Fourth, the technical parameters:
Some basic parameters fine Xiamen Chuan JC-LUGB type vortex flowmeter as follows:
Implementation of standards
Vortex flow sensor (JB / T9249-1999)
Meter diameter (mm)
1.6Mpa, 2.5Mpa, 4.0Mpa (the other can be customized)
Liquid: ± 1.0%
Gas or steam: ± 1.5%, ± 1.0%
1: 101: 151: 20
304, 316 (L) stainless steel
Medium temperature: -40 ℃ ~ + 250 ℃, -40 ℃ ~ + 350 ℃
Ambient temperature: -20 ℃ ~ + 60 ℃
Relative humidity 5% to 90%
Atmospheric pressure 86 ~ 106Kpa
A: external power supply, + 24VDC ± 15%, ripple ≤ ± 5%, applicable to 4-20mA output, pulse output, RS485, etc;
B: internal power supply, a group 3.0V10AH lithium battery, the battery voltage can work properly when 2.0-3.0V.
Pulse signal, 4-20mA current signal
Communication output function
RS485, hart protocol communications
Signal line interface
Common type: Horsman joints or comes three core cable;
Explosion-proof: internal thread M20 * 1.5
ExiaIICT5 or ExdIIBT6
IP65 or higher (can be customized)
V. Model Description and Selection:
JC-LUGB- • - • - • - • - • - • - •
① ② ③ ④ ⑤ ⑥ ⑦
①: Link way: two flange connection (1) and clamping flange (2);
②: Measuring media: into gas (1), liquid (2) and steam (3);
③: Nominal size (unit mm): DN15-DN300
④: structure: divided into one formula (Z) and Split (F);
⑤: Header Type: divided into the following categories:
N-type: + 12V or 24V power supply, three-wire output pulse signal;
Type A: + 24V supply, the output wire 4-20mA
Type B: internal lithium battery-powered, live shows, no signal output;
Type C: + 24V power supply, live display, output two-wire 4-20mA;
Type D: + 24V power supply, live shows, RS485 communication;
E type: + 24V power supply, live shows, Hart communication;
F type: integrated temperature and pressure compensation for saturated steam;
G type: integrated temperature and pressure compensation for superheated steam and gases in general;
⑥: Explosion levels: no explosion points (N) and intrinsically safe (E1), flameproof (E2);
⑦: Pressure rating: sub-routine (N) and high pressure (H);
Sixth, the vortex flowmeter installation instructions:
On the diameter of the corresponding pipe flow meter should be installed in a horizontal, vertical, inclined (fluid flow from bottom to top) is. It should also be free to install the mechanical vibrations of the pipeline upstream and downstream of the meter should be configured a certain length straight pipe, its length should comply with the requirements in the following table.
Upstream pipeline form
Upstream straight pipe length
Downstream straight pipe length
Concentric tube fully open valve
Concentric contraction full gate
A 90 ° elbow
The same plane two 90 ° elbow
Two 90 ° elbows in different planes
Regulating valve, the half-open gate
The inner diameter of the straight pipe section as consistent path through the sensor, if not the same, should be taken slightly larger than the diameter of the pipe sensor error to ≤ + 3%, and not more than 5mm.
1, the flow meter is installed in horizontal pipelines: the measurement of gas flow, if measured gas contains a small amount of liquid, flow meter should be installed at the online high; when measuring liquid flow rate, if measured body contains a small amount of gas , the meter should be installed at the lower line.
2, the meter is installed vertically in the pipeline: the measurement of gas flow meter can be installed in a vertical pipeline if they are contained in the gas under a small amount of liquid, gas flow measurement of liquid flow should be upward, the liquid flows by bottom up. .
(Company name) Xiamen Jing Chuan Automation Technology Co., Ltd.
(Company website) http: //www.xmjingchuan.cn/ http:. //www.liuliangji360 Com /
(Address) Xiamen Huli District Yuehua Road, Building 2, Building 151 Howley 5 layers
(Phone) 0592-2657356 / 5/7
(7X24 hours) 15859215896 (Yu Gong)
(Production capacity) design production capacity of one million units per year
(Service) product from the date of the factory within 12 months from the Warranty Services, appears human damage quality problems, the company responsible for repair, replacement or return, outside the guarantee period to provide paid maintenance services for life.