智能渦街流量計是根據(jù)卡門渦街理論，利用了流體的自然振動原理，以壓電晶體或差動電容作為檢測部件而支撐的一種速度式流量儀表。本產(chǎn)品采用獨特的差動技術(shù)，配合隔離、屏蔽、濾波等措施，克服了同類產(chǎn)品抗震性差、噪聲大、小信號數(shù)據(jù)紊亂等問題，并采用了獨特的檢測探頭封裝新技術(shù)和防護(hù)措施，保證了產(chǎn)品的可靠性。

Intelligent vortex flowmeter is based on Karman vortex street theory and the natural vibration principle of fluid. It is supported by piezoelectric crystal or differential capacitance as detection component. This product adopts unique differential technology, combined with isolation, shielding, filtering and other measures to overcome the problems of similar products such as poor seismic resistance, large noise, small signal data disorder, etc., and adopts a unique detection probe packaging new technology and protection measures to ensure the reliability of the product.

產(chǎn)品有基本型、差壓型、溫壓補償一體型三種測量方式，基本型測量單一工況流量信號，差壓補償型直接測量質(zhì)量流量，溫壓補償一體型可同時測量溫度、壓力、流量信號，經(jīng)補償后輸出標(biāo)況體積流量或質(zhì)量流量。產(chǎn)品有管道式和插入式兩種結(jié)構(gòu)形式，可現(xiàn)場顯示，也可遠(yuǎn)距離傳輸，每種型式都有高溫、高壓、防腐、防爆等規(guī)格，又有整體和分體結(jié)構(gòu)，以適應(yīng)不同的測量介質(zhì)和安裝環(huán)境。

The product has three measurement methods: basic type, differential pressure type and temperature pressure compensation type. The basic type measures the flow signal under single working condition, and the differential pressure compensation type directly measures the mass flow. The temperature and pressure compensation type can simultaneously measure the temperature, pressure and flow signals, and output the volume flow or mass flow under standard conditions after compensation. There are two types of products: pipeline type and plug-in type, which can be displayed on site or transmitted over a long distance. Each type has specifications of high temperature, high pressure, anti-corrosion and explosion-proof, as well as integral and split structure to adapt to different measuring media and installation environment.

該系列具有量程比寬、精度高，安裝維護(hù)方便和介質(zhì)適應(yīng)性廣等一系列優(yōu)點。可廣泛應(yīng)用于石油、化工、冶金、機械、食品、造紙、醫(yī)藥、以及城市管道供熱、煤氣等行業(yè)的各種低粘度液體、其他、蒸汽等單相流體的工藝計量和節(jié)能管理。

This series has a series of advantages, such as wide range ratio, high precision, convenient installation and maintenance and wide adaptability of medium. It can be widely used in the process measurement and energy-saving management of low viscosity liquid, other single-phase fluid, steam and other single-phase fluids in petroleum, chemical, metallurgy, machinery, food, papermaking, medicine, urban pipeline heating, gas and other industries.

智能渦街流量計原理

Principle of Intelligent Vortex Flowmeter

渦街流量計是利用卡門渦街原理進(jìn)行流量測量的。在測量管中垂直插入一個柱狀物時，流體通過柱狀物兩側(cè)就自然交替地產(chǎn)生有規(guī)則的漩渦（如下圖所示），這種漩渦列被稱為卡門渦街。在d/D=0.281時，釋放的漩渦非常穩(wěn)定。

Vortex flowmeter is based on the principle of Karman vortex street flow measurement. When a cylinder is inserted vertically into the measuring tube, the fluid will naturally and alternately generate regular vortices (as shown in the figure below) when the fluid passes through the two sides of the cylinder. This kind of vortex array is called Karman vortex street. When D / D = 0.281, the released vortex is very stable.

（D為管道直徑。）卡門渦街的釋放頻率與流體的流動可用下式表示：

(D is the pipe diameter.) The release frequency of Karman vortex street and fluid flow can be expressed as follows:

F=st?v/d     式中：

F = St? V / D, where:

F————————卡門渦街的釋放頻率

F -- release frequency of Karman vortex street

St————————系數(shù)

-- st -- coefficient

V—————————流速

V -- velocity

d—————————柱狀物寬度

D -- width of column

斯特羅哈系數(shù)是渦街流量計的重要系數(shù)，在一定的雷諾數(shù)范圍內(nèi)，斯特羅哈數(shù)接近常數(shù)。如下圖所示，在曲線的St=0.17平直部分，漩渦釋放頻率與流速成正比，檢出頻率f就可求得流速v，由v求出體積流量。用于測量流量的漩渦分離頻率隨流速而變化，不受流體密度和粘度的影響。伴隨漩渦分離而產(chǎn)生的局部壓力脈動，有壓電探頭檢測出來，并在檢測電路中被轉(zhuǎn)換成與漩渦頻率相對應(yīng)的脈沖信號。脈沖信號還可以通過F/V和V/I轉(zhuǎn)化成4-20mA的標(biāo)準(zhǔn)電流信號輸出。

Strouhal coefficient is an important factor of vortex flowmeter. In a certain range of Reynolds number, Strouhal number is close to a constant. As shown in the figure below, in the straight part of the curve with ST = 0.17, the vortex release frequency is directly proportional to the flow rate. The detection frequency f can obtain the velocity V, and the volume flow rate can be obtained from V. The vortex separation frequency used to measure the flow rate varies with the flow rate and is not affected by the density and viscosity of the fluid. The local pressure pulsation caused by vortex separation is detected by piezoelectric probe and converted into pulse signal corresponding to vortex frequency in detection circuit. The pulse signal can also be converted into 4-20mA standard current signal output through F / V and V / I.

智能渦街流量計性能參數(shù)

Performance parameters of Intelligent Vortex Flowmeter

1 公稱口徑：DN15、DN20、DN25、DN32、DN40、DN50、DN65、DN80、DN100、DN125、DN150、DN200、DN250、DN300、DN250～DN2000可選用插入式：

1. Nominal diameter: DN 15, DN20, DN25, DN32, Dn40, DN50, DN65, DN80, DN 100, DN 125, DN 150, DN200, DN250, DN300, DN250 ～ DN2000. Plug in type can be selected

2 使用范圍：氣體（空氣、氧氣、但其、煤氣、天然氣、化學(xué)氣體等）、液體（誰、高溫水、油、食品液、化學(xué)液等）、蒸汽（飽和蒸汽、過熱蒸汽）

Scope of application: gas (air, oxygen, gas, natural gas, chemical gas, etc.), liquid (high temperature water, oil, food liquid, chemical liquid, etc.), steam (saturated steam, superheated steam)

3 可測介質(zhì)溫度：-40℃～280℃，-40℃～350℃

3. Measurable medium temperature: - 40 ℃ ~ 280 ℃, - 40 ℃ ~ 350 ℃

4 公稱壓力：≦1.6Mpa  ≦2.5Mpa  ≦4Mpa

4. Nominal pressure: ≤ 1.6Mpa ≤ 2.5MPa ≤ 4MPa

5 精度等級：液體0.5級、氣體、蒸汽1.0級，插入式2.5級

5 accuracy class: liquid 0.5, gas and steam 1.0, plug-in type 2.5

6 流速范圍：液體0.6-6m/s,氣體：5-60m/s蒸汽：5-70m/s

6 flow rate range: liquid 0.6-6 M / s, gas: 5-60 M / s, steam: 5-70 M / s

7 輸出信號：

7 output signal:

電壓脈沖：低電平≦1V，高電平≧6V，脈沖寬0.4ms，負(fù)載電阻>150

Voltage pulse: low level ≤ 1V, high level ≥ 6V, pulse width 0.4ms, load resistance > 150

標(biāo)準(zhǔn)電流：4-20mA，轉(zhuǎn)換精度0.1%，累計流量9位顯示（m3、kg、t），轉(zhuǎn)換精度0.1%

Standard current: 4-20mA, conversion accuracy 0.1%, cumulative flow 9-bit display (M3, kg, t), conversion accuracy 0.1%

8 供電電源：

8 power supply:

電壓脈沖輸出時：+12VDC，4-20mA輸出時：+24VDC

Voltage pulse output is + 12VDC, 4-20mA output is + 24VDC

現(xiàn)場液晶顯示：3.6V1號1節(jié)鋰電池供電，使用壽命大于2年

LCD: 3.6v1 1 lithium battery power supply, service life more than 2 years

9 環(huán)境溫度：電壓脈沖輸出：-30℃～+65℃，4-20mA輸出：-10℃～+55℃，現(xiàn)場液晶顯示：-25℃～+55℃

9 ambient temperature: voltage pulse output: - 30 ℃ ~ + 65 ℃, 4-20mA output: - 10 ℃ ~ + 55 ℃, on-site LCD: - 25 ℃ ~ + 55 ℃

10 表體材料：1Cr18Ni9Ti（其他材料協(xié)議供貨）。

10 table body material: 1Cr18Ni9Ti (supplied by other materials agreement).

11、防爆等級本安型iaIIbT3-T6、防護(hù)等級IP65

11. Explosion proof grade intrinsic safety type iaiibt3-t6, protection grade IP65

渦街流量計優(yōu)勢特點

Advantages of vortex flowmeter

1、智能渦街流量計的非常大優(yōu)點是抗振性能特別好，無零點漂移，可靠性高

1. The great advantage of intelligent vortex flowmeter is its excellent anti vibration performance, no zero drift and high reliability

2、抗振性能特別好通過長時間對渦街流量計進(jìn)行大量波形分析和頻譜分析。新航設(shè)計出了非常佳的探頭形狀、壁厚、高度、探頭桿直徑及與之相配套的壓電晶體，采用先進(jìn)的數(shù)控車床進(jìn)行加工，確保加工的同軸度和光潔度等技術(shù)參數(shù)。配合特殊的工藝處理。從而非常大限度的克服渦街流量計存在的固有自震蕩頻率對信號的影響這個通病。這是新航公司在制造渦街流量計方面的技術(shù)獨特優(yōu)勢。使得新航公司出廠的渦街流量計有優(yōu)良的抗振動能力。

2. The anti vibration performance is particularly good. A lot of waveform analysis and frequency spectrum analysis of vortex flowmeter are carried out for a long time. SIA has designed a very good probe shape, wall thickness, height, probe rod diameter and its matching piezoelectric crystal, which is processed by advanced CNC lathe to ensure the technical parameters such as coaxiality and smoothness. With special process treatment. Therefore, it overcomes the common problem of the influence of the inherent self oscillation frequency on the signal of the vortex flowmeter to a great extent. This is the unique technical advantage of SIA in manufacturing vortex flowmeter. The vortex flowmeter manufactured by SIA has excellent anti vibration ability.

3、智能渦街流量計的傳感器的通用性很強，從而使得傳感器具有良好的互換性。采用先進(jìn)的數(shù)控設(shè)備加工傳感器的表體和漩渦發(fā)聲體等，確保加工精度，從而使得零部件（特別是漩渦發(fā)聲體）的通用性強，從而真正做到不會因零部件的更換而影響傳感器的重復(fù)性和精度，能產(chǎn)生強大而穩(wěn)定的渦街信號。

3. The sensor of intelligent vortex flowmeter has strong universality, which makes the sensor have good interchangeability. Advanced numerical control equipment is used to process the sensor body and vortex generator to ensure the machining accuracy, so as to make the parts (especially the vortex generator) have strong versatility, so that the repeatability and accuracy of the sensor will not be affected by the replacement of parts, and the strong and stable vortex street signal can be generated.

注：表中(300)～(1000)口徑為插入式

Note: the diameters of (300) ～ (1000) in the table are plug-in type

工況流量是指儀表測量出當(dāng)前通過管道介質(zhì)的體積，是在工作狀態(tài)下的介質(zhì)，例如氣體是可以被壓縮的，在管道內(nèi)存在壓力時，氣體被壓縮后的體積就是工況流量。工況流量會隨著工作環(huán)境改變而改變。

Working condition flow refers to the volume of medium passing through the pipeline measured by the instrument, which is the medium under working condition. For example, gas can be compressed. When there is pressure in the pipeline, the volume of compressed gas is the working flow. The flow rate will change with the change of working environment.

標(biāo)況流量是指介質(zhì)在標(biāo)準(zhǔn)大氣壓力下和 0°（或 20°）標(biāo)準(zhǔn)下的體積，當(dāng)壓縮氣體被釋放到標(biāo)況環(huán)境中轉(zhuǎn)化的體積。標(biāo)況流量在任何環(huán)境中均不會發(fā)生改變。

Standard flow rate refers to the volume of medium under standard atmospheric pressure and 0 ° (or 20 °) standard, and the volume converted when compressed gas is released into standard environment. The standard flow rate will not change in any environment.

渦街流量計測量得出的是工況體積，只有做溫壓補償后才可以得出標(biāo)況體積，一般用于貿(mào)易計量時， 氣體采用標(biāo)況為主，蒸汽通常采用質(zhì)量計量。

The volume measured by vortex flowmeter is the working condition volume, and the standard volume can be obtained only after temperature and pressure compensation. When it is generally used for trade measurement, the standard condition is mainly used for gas, and the mass measurement is usually used for steam.

氣體渦街流量計安廠家儀表管道安裝要求

Installation requirements for instrument pipe of gas vortex flowmeter manufacturer

產(chǎn)品安裝與使用

Product installation and use

6.1儀表安裝環(huán)境要求

6.1 environmental requirements for instrument installation

1.流量計應(yīng)安裝在室內(nèi)，如果安裝在室外，上面應(yīng)有遮蓋物，以防雨水侵入和烈日暴曬而影響流量計的使用壽命（流量計接線時屏蔽線要做成 U 型，非常后進(jìn)入表殼時線路為從下往上，避免雨水沿線路進(jìn)入到表殼內(nèi)部）；

1. The flowmeter should be installed indoors. If it is installed outdoors, it should be covered to prevent rainwater intrusion and sun exposure from affecting the service life of the flowmeter (the shielding wire of the flowmeter should be U-shaped, and the line should be from bottom to top when entering into the case after the connection, so as to avoid rainwater from entering the inside of the meter case along the line);

2.流量計周圍不得有強外磁場干擾、強電設(shè)備、高頻設(shè)備，并且避免與這些設(shè)備共用電源；

2. There should be no strong external magnetic field interference, strong current equipment and high frequency equipment around the flowmeter, and avoid sharing power with these equipment;

3.不要和變頻器、電焊機等污染電源的設(shè)備共用電源，必要時加裝凈化電源；

3. Do not share the power supply with the inverter, welding machine and other equipment that pollute the power supply. If necessary, install the purified power supply;

4.避開高溫、寒冷、腐蝕性或極度潮濕的環(huán)境，如必須安裝必須做好流量計的保護(hù)工作；

4. Avoid high temperature, cold, corrosive or extremely humid environment. If it must be installed, the flowmeter must be well protected;

5.流量計應(yīng)避免安裝在振動較強的管道上。若必須安裝，須在其上下游 2D 處加設(shè)管道緊固裝置，并加防振墊，加強抗振效果；

5. The flowmeter should not be installed on the pipeline with strong vibration. If it must be installed, pipeline fastening device and anti vibration pad shall be installed at 2D upstream and downstream to enhance anti vibration effect;

6.儀表安裝點周圍應(yīng)該留有較充裕的空間，以便安裝接線和定期維護(hù)。

6. Sufficient space should be reserved around the instrument installation point for installation, wiring and regular maintenance.

6.2儀表管道安裝要求

6.2 installation requirements of instrument pipeline

渦街流量儀表對安裝點的上下游直管段有一定要求，否則會影響介質(zhì)在管道中的流場，影響儀表的測量精度。儀表的上下游直管段長度要求見圖，DN 為儀表公稱通徑，單位:mm

Vortex flowmeter has certain requirements for the upstream and downstream straight pipe section of the installation point, otherwise it will affect the flow field of medium in the pipeline and the measurement accuracy of the instrument. The length requirements of upstream and downstream straight pipe sections of the instrument are shown in the figure. DN is the nominal diameter of the instrument, unit: mm

注:  1、調(diào)節(jié)閥盡可能不安裝在渦街流量儀表的上游,而應(yīng)安裝在渦街流量儀表的下游 10D 以外。

Note: 1. The regulating valve shall not be installed upstream of vortex flowmeter as far as possible, but shall be installed outside 10d downstream of vortex flowmeter.

2、上、下游配管內(nèi)徑應(yīng)相同。如有差異，則配管內(nèi)徑 Dp 與渦街儀表表體內(nèi)徑 Db,應(yīng)滿足以下關(guān)系0.98Db≤Dp≤1.05Db

2. The inner diameter of upstream and downstream piping should be the same. If there is any difference, the relationship between the inner diameter of piping DP and the inner diameter of vortex meter body DB shall be 0.98db ≤ DP ≤ 1.05db

3、上、下游配管應(yīng)與流量儀表表體內(nèi)徑同心，它們之間的不同軸度應(yīng)小于 0.05Db

3. The upstream and downstream piping should be concentric with the inner diameter of the flow meter body, and the different axial degrees between them should be less than 0.05db

4、儀表與法蘭之間的密封墊，在安裝時不能凸入管內(nèi)，其內(nèi)徑應(yīng)比表體內(nèi)徑大 1-2mm

4. The gasket between the instrument and the flange should not protrude into the pipe during installation, and its inner diameter should be 1-2mm larger than the inner diameter of the body

5、測壓孔和測溫孔的安裝設(shè)計。被測管道需要安裝溫度和壓力變送器時，測壓孔應(yīng)設(shè)置在下游 3-5D處，測溫孔應(yīng)設(shè)置在下游 6-8D 處。D 為儀表公稱口徑，單位：mm

5. Installation design of pressure measuring hole and temperature measuring hole. When the measured pipeline needs to install temperature and pressure transmitter, the pressure measuring hole should be set at the downstream 3-5d, and the temperature measuring hole should be set at the downstream 6-8d. D is the nominal diameter of the instrument in mm

6、儀表在管道上可以水平、垂直或傾斜安裝。

6. The instrument can be installed horizontally, vertically or obliquely on the pipeline.

7、測量氣體時，在垂直管道安裝儀表，氣體流向不限。但若管道內(nèi)含少量液體，為了防止液體進(jìn)入儀   表測量管，氣流應(yīng)自下而上流動，如圖（四）a 所示

7. When measuring the gas, install the instrument in the vertical pipe, and the gas flow direction is unlimited. However, if the pipeline contains a small amount of liquid, the air flow should flow from bottom to top in order to prevent liquid from entering the instrument measuring tube, as shown in Fig. (4) a

8、 測量液體時，為了保證管內(nèi)充滿液體，所以在垂直或傾斜管道安裝儀表時，應(yīng)該保證液體流動方向從下而上。若管道內(nèi)含少量氣體，為了防止氣體進(jìn)入儀表測量管，儀表應(yīng)安裝在管線的較低處如圖（四）b 所示

8. When measuring liquid, in order to ensure that the pipe is full of liquid, when installing the instrument in vertical or inclined pipeline, the liquid flow direction should be ensured from bottom to top. If the pipeline contains a small amount of gas, in order to prevent the gas from entering the instrument measuring pipe, the instrument should be installed at the lower part of the pipeline, as shown in Fig. (4) B

9、測量高溫、低溫介質(zhì)時，應(yīng)注意保溫措施。轉(zhuǎn)換器內(nèi)部（表頭殼體內(nèi)）高溫一般不應(yīng)超過 70℃；低溫易使轉(zhuǎn)換器內(nèi)部出現(xiàn)凝露，降低抑

9. When measuring high temperature and low temperature medium, attention should be paid to heat preservation measures. The internal temperature of the converter should not be lower than 70 ℃

制電路板的絕緣阻抗，影響儀表正常工作。

The insulation impedance of the circuit board affects the normal operation of the instrument.

6.3插入式渦街流量儀表安裝步驟

6.3 installation steps of plug-in vortex flowmeter

1.在管道上用氣焊開一個略小于φ100mm 的圓孔，并把圓孔周圍毛刺清除干凈，以保證測頭旋轉(zhuǎn)流利；

1. Use gas welding to open a round hole slightly smaller than φ 100 mm on the pipe, and remove the burr around the round hole to ensure the smooth rotation of the probe;

2.在管道圓孔處焊上廠家提供的法蘭，要求法蘭軸線與管道軸線垂直；

2. The flange provided by the manufacturer shall be welded on the pipe round hole, and the flange axis shall be vertical to the pipeline axis;

3.將球閥及傳感器安裝在焊接好的法蘭上；

3. Install the ball valve and sensor on the welded flange;

4.調(diào)節(jié)絲杠，使插入深度符合要求（保證測頭中心軸線和管道中心軸線重合），流體流向必須與方向標(biāo)上的指示箭頭保持一致；

4. Adjust the lead screw to make the insertion depth meet the requirements (ensure that the central axis of the probe coincides with the central axis of the pipeline), and the fluid flow direction must be consistent with the indication arrow on the direction indicator;

5.均勻擰緊壓蓋上的螺絲。(注：壓蓋的松緊程度決定儀表的密封程度和絲杠能否旋動)；

5. Tighten the screws on the gland evenly. (Note: the tightness of the gland determines the sealing degree of the instrument and whether the screw can rotate or not);

6.檢查各環(huán)節(jié)是否完成好，慢慢打開閥門觀察是否有泄漏（需特別注意人身安全）若有泄露請重復(fù)步驟 5、6。

6. Check whether all links are completed, slowly open the valve to observe whether there is leakage (pay special attention to personal safety). If there is leakage, please repeat steps 5 and 6.

智能渦街流量計選型

Selection of Intelligent Vortex Flowmeter