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E+H渦街流量計(jì)

E+H流量計(jì)

E+H電磁流量計(jì)E+H  E+H質(zhì)量流量計(jì)E+H  E+H渦街流量計(jì)E+H  E+H超聲波流量計(jì)E+H

E+H流量?jī)x表：1、E+H電磁流量計(jì)：提供了高量程比的高精度測(cè)量？捎糜趪(yán)格的衛(wèi)生場(chǎng)合，并提供適用于危險(xiǎn)場(chǎng)合的安全認(rèn)證。型號(hào)有:50W/53W,50P/53P,50H/53H,10W,10H,10P,23H,23P,55S/55H55S電磁流量計(jì)   55H電磁流量計(jì)

2、E+H渦街流量計(jì)：用來測(cè)量氣體、蒸氣和液體的流量。安裝成本低，壓損小，長(zhǎng)時(shí)間穩(wěn)定性及寬動(dòng)態(tài)測(cè)量范圍。主要型號(hào)有:72F,73F,72W   Prowirl 72W渦街流量計(jì)   Prowirl 72F渦街流量計(jì)  Prowirl 73F渦街流量計(jì)  Prowirl 73W渦街流量計(jì)

3、E+H熱式質(zhì)量流量計(jì)：用來測(cè)量氣體的流量，操作簡(jiǎn)便，無壓損及寬動(dòng)態(tài)測(cè)量范圍。主要型號(hào)有:80/83F,80/83E,80/83H,80/83M,80/83A,80/83I,40E,84F,84M 84F質(zhì)量流量計(jì)  84A質(zhì)量流量計(jì)  84M質(zhì)量流量計(jì)  CNGmass質(zhì)量流量計(jì)  40E質(zhì)量流量計(jì) 

4、E+H超聲波流量計(jì)：外部安裝，非接觸測(cè)量。安裝簡(jiǎn)便，不干擾工藝過程，適用于腐蝕性介質(zhì)，高壓、衛(wèi)生場(chǎng)合。型號(hào)有: 90/93W,93/90A,90/93U/C93T超聲波流量計(jì)   92F超聲波流量計(jì)

   E+H（恩德斯豪斯）t-switch 熱式氣體流量測(cè)量    E+H（恩德斯豪斯）t-trend 熱式氣體流量測(cè)量    E+H（恩德斯豪斯）能量計(jì)算儀 RMC 621    E+H（恩德斯豪斯）能量計(jì)算儀 RMS 621    E+H（恩德斯豪斯）Magphant 插入式電磁流量計(jì)    E+H（恩德斯豪斯）Memo-graph 可視數(shù)據(jù)管理器    E+H（恩德斯豪斯）RIA 250 過程顯示儀    E+H（恩德斯豪斯）RIA 251 過程顯示儀    E+H（恩德斯豪斯）RIA 450 過程指示儀   E+H（恩德斯豪斯）t-mass S AT70熱式氣體流量測(cè)量

E+H能量計(jì)算儀RMC621/RMS621

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該公司產(chǎn)品分類： RBT ABB VEGA P+F 倍加福 FESTO 費(fèi)斯托 E+H

組合型與分離型渦街流量傳感器傳感器

 

        渦街流量傳感器是可以兼顧測(cè)量液體，氣體和蒸汽的儀表。包括輸出脈沖信號(hào)的轉(zhuǎn)換器和輸出4～20mA模擬信號(hào)的變送器，并按轉(zhuǎn)換器與傳感器的安裝形式分為組合型與分離型兩種。        組合型渦街流量傳感器結(jié)構(gòu)如(圖1）        分離型渦街流量傳感器其結(jié)構(gòu)如(圖2）

Vortex美國Aalborg渦街流量計(jì)/渦輪流量計(jì)

渦街流量計(jì)的基本原理是卡門渦街現(xiàn)象，當(dāng)流體環(huán)繞通過一個(gè)非流線型的柱體時(shí)將產(chǎn)生漩渦，漩渦在柱體的兩側(cè)交替產(chǎn)生。因此產(chǎn)生了一個(gè)周期性的壓力脈沖，產(chǎn)生漩渦的頻率與流量的大小成線性比例關(guān)系。Aalborg公司的獨(dú)特的雙信號(hào)處理技術(shù)單獨(dú)測(cè)量柱體兩側(cè)的漩渦，同時(shí)過濾干擾信號(hào)。因此在全量程范圍內(nèi)具有較高的測(cè)量精確度和抗干擾能力。

特點(diǎn):性  ：無可移動(dòng)部件          電路部分與表體可以分體式安裝，最長(zhǎng)距離可達(dá)30.5米（100英尺）          傳感器不接觸測(cè)量介質(zhì)          無可阻塞孔寬量程比：最大量程比可達(dá)80：1 雙信號(hào)處理技術(shù)提高了小流量精確度高精度  ：0.5%讀數(shù)精度          雙信號(hào)處理技術(shù)提高了抗干擾能力

 

性能特性:

型號(hào)：VX
測(cè)量范圍 ：0-100000（m3/h）精度    ：0.5%讀數(shù)重復(fù)性 ：0.25%讀數(shù)
工作溫度：-73-232（℃）
工作壓力：10（MPa）響應(yīng)時(shí)間：0.5 S阻尼    ：1…10 S 可調(diào)整速度范圍：液體  0.4…9.15 m/s 蒸汽和氣體  認(rèn)證    ：FM及CSA 1 Div 2 Groups B,C,D.
物理特性結(jié)構(gòu)材質(zhì)漩渦發(fā)生體：304 SS 或 316 SS電極      ：304 SS 或 316 SS 封裝陶瓷測(cè)量管    ：304 SS 或 316 SS法蘭      ：304L SS 或316L SS.表頭殼體 ：環(huán)氧涂層鋁連接和安裝安裝位置 ：垂直，水平，傾斜直管段要求：上游   20D 下游   5D溫度傳感器：下游  3.5D壓力傳感器：上游  3.5D過程連接 ：法蘭夾持 法蘭連接標(biāo)準(zhǔn) ANSI,DIN電氣接口 ：3/4’’ FNPT
電子特性環(huán)境溫度：-12℃…121℃變送器 ：基于微處理器顯示    ：2＊16 字符顯示同時(shí)顯示順時(shí)流量和累積流量功能    ：零點(diǎn)，滿量程，上限切除，下限切除，響應(yīng)時(shí)間，采集時(shí)間工程單位，累積器，數(shù)據(jù)記錄，RS232  輸出信號(hào)：4…20 mA 阻抗小于600 Ω          5 V TTL脈沖輸出防護(hù)等級(jí)：NEMA 4X防爆認(rèn)證：UL, CSA, FM, Class I Groups B, C, D Class II          Groups E, , KEMA/CENELEC EEx d IIB電源    ：15…30 VDC,115VAC,230VAC（可選）

LT-LUB智能渦街流量計(jì)

 

智能渦街流量計(jì)

 

 

 

LT-LUB智能渦街流量計(jì)原理  在流體中設(shè)置三角柱型旋渦發(fā)生體，則從旋渦發(fā)生體兩側(cè)交替地產(chǎn)生有規(guī)則的旋渦，這種旋渦稱為卡門旋渦，如右圖所示，旋渦列在旋渦發(fā)生體下游非對(duì)稱地排列。 設(shè)旋渦的發(fā)生頻率為f，被測(cè)介質(zhì)平均流速為 ，旋渦發(fā)生體迎流面寬度為d，表體通徑為D，即可得到以下關(guān)系式：  f=SrU1/d=SrU/md 　　　　　　　　　　　　　　　　　　　。1） 式中　　U1－－旋渦發(fā)生體兩側(cè)平均流速，m/s； Sr－－斯特勞哈爾數(shù)； m－－旋渦發(fā)生體兩側(cè)弓形面積與管道橫截面面積之比   管道內(nèi)體積流量qv為 qv=πD2U/4=πD2mdf/4Sr 　　　　　　　　　　　　　　　。2） K=f/qv=[πD2md/4Sr]-1 　　　　　　　　　　　　　　　　 （3） 式中 K－－流量計(jì)的儀表系數(shù)，脈沖數(shù)/m3（P/m3）。 K除與旋渦發(fā)生體、管道的幾何尺寸有關(guān)外，還與斯特勞哈爾數(shù)有關(guān)。斯特勞哈爾數(shù)為無量綱參數(shù)，它與旋渦發(fā)生體形狀及雷諾數(shù)有關(guān)，圖2所示為圓柱狀旋渦發(fā)生體的斯特勞哈爾數(shù)與管道雷諾數(shù)的關(guān)系圖。由圖可見，在ReD=2×104～7×106范圍內(nèi)，Sr可視為常數(shù)，這是儀表正常工作范圍。當(dāng)測(cè)量氣體流量時(shí)，VSF的流量計(jì)算式為  （4） 圖2 斯特勞哈爾數(shù)與雷諾數(shù)關(guān)系曲線  式中 qVn，qV－－分別為標(biāo)準(zhǔn)狀態(tài)下（0oC或20oC，101.325kPa）和工況下的體積流量，m3/h；  LT，P－－分別為標(biāo)準(zhǔn)狀態(tài)下和工況下的絕對(duì)壓力，Pa； Tn，T－－分別為標(biāo)準(zhǔn)狀態(tài)下和工況下的熱力學(xué)溫度，K； LT，Z－－分別為標(biāo)準(zhǔn)狀態(tài)下和工況下氣體壓縮系數(shù)。  由上式可見，VSF輸出的脈沖頻率信號(hào)不受流體物性和組分變化的影響，即儀表系數(shù)在一定雷諾數(shù)范圍內(nèi)僅與旋渦發(fā)生體及管道的形狀尺寸等有關(guān)。但是作為流量計(jì)在物料平衡及能源計(jì)量中需檢測(cè)質(zhì)量流量，這時(shí)流量計(jì)的輸出信號(hào)應(yīng)同時(shí)監(jiān)測(cè)體積流量和流體密度，流體物性和組分對(duì)流量計(jì)量還是有直接影響的。  渦街流量計(jì)便是依據(jù)卡門旋渦原理進(jìn)行封閉管道流體流量測(cè)量的新型流量計(jì)。因其具有良好的介質(zhì)適應(yīng)能力，無需溫度壓力補(bǔ)償即可直接測(cè)量蒸汽、空氣、氣體、水、液體的工況體積流量，配備溫度、壓力傳感器可測(cè)量標(biāo)況體積流量和質(zhì)量流量，是節(jié)流式流量計(jì)的理想替代產(chǎn)品。 為提高渦街流量計(jì)的耐高溫及抗振動(dòng)性能，我公司新近開發(fā)出了SDLU改進(jìn)型渦街流量傳感器，因其獨(dú)特的結(jié)構(gòu)和選材使該傳感器可在高溫（350℃）、強(qiáng)振動(dòng)（≤1g）的惡劣工況下使用。 在實(shí)際應(yīng)用中，往往最大流量遠(yuǎn)低于儀表的上限值，隨著負(fù)荷的變化，最小流量又往往會(huì)低于儀表的下限值，儀表并非工作在它的最佳工作段，為了解決這一問題，通常采用在測(cè)量處縮徑提高測(cè)量處的流速，并選用較小口徑的儀表以利于儀表的測(cè)量，但是這種變徑方式必須在變徑管與儀表間有長(zhǎng)度為15D以上的直管段進(jìn)行整流，使加工、安裝都不方便。我公司研制的縱斷面形狀為圓弧的LGZ變徑整流器，具有整流、提高流速及改變流速分布多重作用，其結(jié)構(gòu)尺寸小，僅為工藝管內(nèi)徑的1/3，與渦街流量計(jì)作成一體，不僅不需要另外附加一段直管段，還可以降低對(duì)工藝管直管段的要求，安裝非常方便。  為了使用方便，電池供電的本地顯示型渦街流量計(jì)采用微功耗高新技術(shù)，采用鋰電池供電可不間斷運(yùn)行一年以上，節(jié)省了電纜和顯示儀表的采購安裝費(fèi)用，可就地顯示瞬時(shí)流量、累積流量等。溫度補(bǔ)償一體型渦街流量計(jì)還帶有溫度傳感器，可以直接測(cè)量出飽和蒸汽的溫度并計(jì)算出壓力，從而顯示飽和蒸汽的質(zhì)量流量。溫壓補(bǔ)償一體型帶有溫度、壓力傳感器，用于氣體流量測(cè)量可直接測(cè)量出氣體介質(zhì)的溫度和壓力，從而顯示氣體的標(biāo)況體積流量。 ◆測(cè)量介質(zhì)：氣體、液體、蒸氣 ◆口徑規(guī)格法蘭卡裝式口徑選擇25,32,50,80,100 ◆法蘭連接式口徑選擇100,150,200 ◆流量測(cè)量范圍正常測(cè)量流速范圍?雷諾數(shù)1.5×104～4×106；氣體5～50m/s;液體0.5～7m/s 正常測(cè)量流量范圍液體、氣體流量測(cè)量范圍見表2；蒸氣流量范圍見表3 ◆測(cè)量精度1.0級(jí)? 1.5級(jí) ◆被測(cè)介質(zhì)溫度:常溫–25℃～100℃ ◆高溫–25℃～150℃ -25℃～250℃ ◆輸出信號(hào)脈沖電壓輸出信號(hào)高電平8～10V 低電平0.7～1.3V ◆脈沖占空比約50%,傳輸距離為100m ◆脈沖電流遠(yuǎn)傳信號(hào)4～20 mA,傳輸距離為1000m ◆儀表使用環(huán)境溫度:-25℃～+55℃ 濕度:5～90% RH50℃ ◆材質(zhì)不銹鋼, 鋁合金 ◆電源DC24V或鋰電池3.6V ◆防爆等級(jí)本安型iaIIbT3-T6 防護(hù)等級(jí)IP65 智能渦街流量計(jì)產(chǎn)品選型

代號(hào)

通徑

流量范圍㎡/h

LT-LUB-25

DN25

1~10（液體）

25~60（氣體）

蒸汽流量請(qǐng)查看說明書，DN300以上推薦使用插入式渦街流量計(jì)

LT-LUB-32

DN32

1.5~18（液體）

15~150（氣體）

LT-LUB-40

DN40

2.2~27（液體）

22.6~150（氣體）

LT-LUB-50

DN50

4~55（液體）

35~350（氣體）

LT-LUB-80

DN80

9~135（液體）

90~900（氣體）

LT-LUB-100

DN100

14~200（液體）

140~1400（氣體）

LT-LUB-150

DN150

32~480（液體）

300~3000（氣體）

LT-LUB-200

DN200

56~800（液體）

550~5500（氣體）

 

代號(hào)

功能1

N

無溫壓補(bǔ)償

Y

有溫壓補(bǔ)償

 

代號(hào)

輸出型號(hào)

F1

4-20mA輸出（二線制）

F2

4-20mA輸出（三線制）

F3

RS485通訊接口

 

代號(hào)

被測(cè)介質(zhì)

J1

液體

J2

氣體

J3

蒸汽

 

代號(hào)

連接方式

L1

法蘭卡裝式

L2

法蘭連接式

 

代號(hào)

功能2

E1

1.0級(jí)

E2

1.5級(jí)

T1

常溫

T2

高溫

T3

蒸汽

P1

1.6MPa

P2

2.5MPa

P3

4.0MPa

D1

內(nèi)部3.6V供電

D2

DC24V供電

B1

不銹鋼

B2

碳鋼

渦街流量計(jì)的優(yōu)點(diǎn) LT-LUB-智能渦街流量計(jì)的最大優(yōu)點(diǎn)是抗振性能特別好，無零點(diǎn)漂移，可靠性高。     通過長(zhǎng)時(shí)間對(duì)渦街流量計(jì)進(jìn)行的大量波形分析和頻譜分析，富沃得設(shè)計(jì)出了最佳的探頭形狀、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，從而最大限度的克服渦街流量計(jì)存在的固有自振蕩頻率對(duì)信號(hào)的影響這個(gè)通病。這是富沃得公司在制作渦街流量計(jì)方面的技術(shù)獨(dú)特優(yōu)勢(shì)，使得富沃得公司出廠的渦街流量計(jì)具有量好的抗振動(dòng)能力。     ②FFM63系列智能渦街流量計(jì)的傳感器的通用性很強(qiáng)，從而使傳感器具有良好的互換性采用先進(jìn)數(shù)控設(shè)備加工傳感器的表體和旋渦發(fā)生體等，確保加工精度，從而使零部件（特別是旋渦發(fā)生體）的通用性強(qiáng)，從而真正做到不會(huì)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(qiáng)大而穩(wěn)定的渦街信號(hào)。     ③結(jié)構(gòu)簡(jiǎn)單牢固，無可動(dòng)部件，可靠性高，使用維護(hù)方便。      ④檢測(cè)元件不與介質(zhì)接觸，性能穩(wěn)定，使用壽命長(zhǎng)     傳感器采用檢測(cè)探頭與旋渦發(fā)生體分開安裝，而且耐高溫的壓電晶體密封在檢測(cè)探頭內(nèi)，不與被測(cè)介質(zhì)接觸，所以FFM63系列渦街流量計(jì)具有結(jié)構(gòu)簡(jiǎn)單、通用性好和穩(wěn)定性高的特點(diǎn)。     ⑤輸出與流量成正比的脈沖信號(hào)或模擬信號(hào)，無零點(diǎn)漂移，精度高，方便與計(jì)算機(jī)聯(lián)網(wǎng)     ⑥測(cè)量范圍寬，量程比可達(dá)1：10     ⑦渦街流量計(jì)測(cè)量體積流量時(shí)不需補(bǔ)償，渦街輸出的信號(hào)實(shí)際上是與流速成線性關(guān)系的，也就是與體積流量成正比。壓力和溫度補(bǔ)償?shù)哪康氖菫榱说玫搅黧w的密度，乘以體積流量就得到質(zhì)量流量，若測(cè)量氣體的體積流量就不需要補(bǔ)償了。     ⑧壓力損失小。     用口徑DN50的渦街流量計(jì)測(cè)量可燃?xì)怏w的流量，若管道內(nèi)的最大流量Qmax ＝200m3/h時(shí)，傳感器的壓力損失是：△P ＝1.08×10-6 ρv2（kPa）= 0.605 KPa     ⑨在一定的雷諾數(shù)范圍內(nèi)，流量特性不受流體壓力、溫度、黏度、密度、成分的影響，僅是與旋渦發(fā)生體的形狀和尺寸有關(guān)。     ⑩應(yīng)用范圍廣，蒸汽、氣體、液體流量均可測(cè)量。 渦街流量計(jì)的技術(shù)參數(shù) ●測(cè)量流體：飽和蒸汽、過熱蒸汽、氣體、液體（避免多相流） ●測(cè)量準(zhǔn)確度及重復(fù)性：

測(cè)量流體

準(zhǔn)確度

重復(fù)性

氣體（含蒸汽）

1.0級(jí)

0.33%

液體

1.5級(jí)

0.5%

●測(cè)量范圍

測(cè)量流體

流速下限（m/s）

流速上限（m/s）

氣體（含蒸汽）

7

70

液體

0.7

7

●額定壓力：1.6MPa、2.5MPa、6.3MPa ●流體溫度：-40℃～250℃（普通型），100℃～350℃（普通型） ●結(jié)構(gòu)類型：一體型渦街流量計(jì) ●結(jié)構(gòu)材質(zhì)

部件名稱

材質(zhì)

傳感器表體

304不銹鋼、316不銹鋼

旋渦發(fā)生體

304不銹鋼、316不銹鋼

檢測(cè)探頭

316L

連桿

304不銹鋼

散熱器

鋁合金

墊片

耐高溫石棉墊、丁晴橡膠墊片、石墨墊片

●工作電源

第一種電源方式

3.6V鋰電池供電（就地顯示型）

第二種電源方式

24VDC（或12VDC）

第二種電源方式

24VDC（或12VDC）或3.6V鋰電池供電雙電源供電

●輸出信號(hào)：脈沖輸出、4～20mA 電流輸出，RS485通訊等三種輸出可供選擇 ●電氣接口：M20*1.5 ●防護(hù)等級(jí)：IP65 ●表體處理：傳感器表體采用不銹鋼噴砂，放大器外殼采用噴塑。 ●環(huán)境溫度：-35℃～60℃（無LCD）、-5℃～60℃（帶LCD） ●相對(duì)濕度：5%～95℃  渦街流量計(jì)的安裝要求 渦街流量計(jì)有許多種結(jié)構(gòu)形式，安裝、維修人員需要了解所裝儀表的具體結(jié)構(gòu)、特點(diǎn)以及流量信號(hào)的轉(zhuǎn)換，了解信號(hào)傳輸過程中的各個(gè)環(huán)節(jié)，按產(chǎn)品說明書進(jìn)行安裝，以確保流量計(jì)的精確測(cè)量。
該公司產(chǎn)品分類： 巡檢儀 威力巴流量計(jì) 溫壓補(bǔ)償型渦街流量計(jì) 分體式電磁流量計(jì) 插入式電磁流量計(jì) 德爾塔巴流量計(jì) 皮托管流量計(jì) 彩屏無紙記錄儀 藍(lán)屏無紙記錄儀 基本型無紙記錄儀 無紙記錄儀 記錄儀表 磁性浮子液位計(jì) 浮球開關(guān) 磁翻板液位計(jì) 浮球液位計(jì) 金屬管轉(zhuǎn)子流量計(jì) 智能手操器 流量積算儀 閃光報(bào)警器

LUGBS系列管道式渦街流量計(jì)，內(nèi)蒙管道式渦街流量計(jì)

 

² LUGBS簡(jiǎn)介

 LUGB系列管道式渦街流量計(jì)是由設(shè)計(jì)在流場(chǎng)中的旋渦發(fā)生體、檢測(cè)探頭及相應(yīng)的電子線路等組成。當(dāng)流體流經(jīng)旋渦發(fā)生體時(shí)，它的兩側(cè)就形成了交替變化的兩排旋渦，這種旋渦被稱為卡門渦街。斯特羅哈爾在卡門渦街理論的基礎(chǔ)上又提出了卡門渦街的頻率與流體的流速成正比，并給出了頻率與流速的關(guān)系式：         f=St×V/d    式中：f 渦街發(fā)生頻率（Hz）  

 V 旋渦發(fā)生體兩側(cè)的平均流速（m/s） St 斯特哈羅爾系數(shù)（常數(shù)）

  這些交替變化的旋渦就形成了一系列交替變化的負(fù)壓力，該壓力作用在檢測(cè)探頭上，便形成了一系列的交變電信號(hào)，經(jīng)前置放大器轉(zhuǎn)換、整形、放大處理后，輸出與旋渦同步成正比的脈沖頻率信號(hào)（或標(biāo)準(zhǔn)信號(hào)）。

² LUGBS產(chǎn)品特點(diǎn)

1） 無可動(dòng)部件，長(zhǎng)期穩(wěn)定，結(jié)構(gòu)簡(jiǎn)單便于安裝和維護(hù)

2） 傳感器輸出為脈沖頻率，其頻率與被測(cè)流體的實(shí)際流量呈線性，零點(diǎn)無漂移，性能十分穩(wěn)定，結(jié)構(gòu)形式多樣，有管道式、插入式流量傳感器形式

3） 精確度較高，通常液體的測(cè)量精度為±1.0%；氣體的測(cè)量精度為±1.5%

4） 測(cè)量量程范圍寬，在雷諾數(shù)為2×104 ～7×106范圍內(nèi)，可達(dá)1:20

5） 壓損小（約為孔板流量計(jì)的1/4～1/2），屬于節(jié)能流量?jī)x表

6） 安裝方式靈活，根據(jù)現(xiàn)場(chǎng)工藝管道不通，可水平，垂直和不同角度傾斜安裝

7） 采用消擾電路和抗震動(dòng)傳感頭，具有一定抗環(huán)境振動(dòng)性能

8） 采用超低功耗單片微機(jī)技術(shù)，1節(jié)3V10AH鋰電池可使用5年以上

9） 由軟件對(duì)儀表系數(shù)非線性進(jìn)行修正，提高測(cè)量精度

10） 采用EPROM對(duì)累積流量進(jìn)行掉電保護(hù)，保護(hù)時(shí)間大于10年

² LUGBS產(chǎn)品分類

儀表型號(hào)

LUGBS-N

LUGBS-A

LUGBS-B

LUGBS-C

LUGBS-D

信號(hào)輸出

脈沖

4-20mA

無

4-20mA

可選4-20mA/脈沖

供電電源

+24VDC±15%

+24VDC±15%

鋰電池

24VDC±15%

24VDC±15%+鋰電池

精度等級(jí)

液體：1.0級(jí) 氣體或蒸汽：1.5～1.0級(jí)

液體：1.0級(jí) 氣體或蒸汽：1.5～1.0級(jí)

液體：1.0級(jí) 氣體或蒸汽：1.5～1.0級(jí)

測(cè)量范圍

標(biāo)準(zhǔn)量程

標(biāo)準(zhǔn)量程或擴(kuò)展量程

標(biāo)準(zhǔn)量程或擴(kuò)展量程

顯示器

無

有

有

溫壓補(bǔ)償

無

無

有

通訊接口

無

無

RS485

實(shí)時(shí)記錄

無

無

有

儀表材質(zhì)

304或316L不銹鋼

304或316L不銹鋼

304或316L不銹鋼

防爆等級(jí)

ExdIIBT6或ExiaIICT4

ExdIIBT6或ExiaIICT4

ExdIIBT6或ExiaIICT4

防護(hù)等級(jí)

IP65

IP65

IP65

整機(jī)功耗

< 1W

< 1W

< 1W

儀表通經(jīng)

DN15～DN300

DN15～DN300

DN15～DN300

安裝方式

法蘭安裝

法蘭安裝

法蘭安裝

介質(zhì)溫度

-40℃～250℃或 -40℃～350℃

-40℃～250℃或 -40℃～350℃

-40℃～250℃或 -40℃～350℃

環(huán)境溫度

-20℃～60℃

-20℃～60℃

-20℃～60℃

² LUGBS測(cè)量范圍及工作壓力

儀表口徑 （mm）

液體測(cè)量范圍 （m3/h）

氣體測(cè)量范圍 （m3/h） 

連接方式

耐壓等級(jí) （Mpa）

DN15

1.2-6.2

5-25

法蘭夾裝/法蘭連接

2.5/1.6

DN20

1.5-10

8-50

法蘭夾裝/法蘭連接

2.5/1.6

DN25

1.6-16

10-70

法蘭夾裝/法蘭連接

2.5/1.6

DN32

1.9-19

15-150

法蘭夾裝/法蘭連接

2.5/1.6

DN40

2.5-26

22-220

法蘭夾裝/法蘭連接

2.5/1.6

DN50

3.5-38

36-320

法蘭夾裝/法蘭連接

2.5/1.6

DN65

6.2-65

50-480

法蘭夾裝/法蘭連接

2.5/1.6

DN80

10-100

70-640

法蘭夾裝/法蘭連接

2.5/1.6

DN100

15-150

130-1100

法蘭夾裝/法蘭連接

2.5/1.6

DN125

25-250

200-1700

法蘭夾裝/法蘭連接

1.6/1.6

DN150

36-380

280-2240

法蘭夾裝/法蘭連接

1.6/1.6

DN200

62-650

580-4960

法蘭夾裝/法蘭連接

1.6/1.6

DN250

140-1400

970-8000

法蘭夾裝/法蘭連接

1.6/1.6

DN300

200-2000

1380-11000

法蘭夾裝/法蘭連接

1.6/1.6

該公司產(chǎn)品分類： 流量系列 溫度溫濕度變送器 壓力系列 液位系列

渦街流量傳感器

渦街流量傳感器
 

      

    LUGB型旋渦流量計(jì)是利用液體振動(dòng)原理而開發(fā)的一種新型流量計(jì)，廣泛應(yīng)用在石油、化工、冶金、造紙等行業(yè)流體的計(jì)量，該流量計(jì)無可動(dòng)部件，性強(qiáng)、精度高、壽命長(zhǎng)，可在很寬的流量范圍內(nèi)精確測(cè)量液體的瞬時(shí)流量和累計(jì)流量。其不受介質(zhì)溫度、壓力、粘度及組分的影響，同時(shí)不堵、不卡、不易結(jié)垢、耐高溫、高壓，安全防爆，適用于惡劣環(huán)境。流量計(jì)分一體化顯示和遠(yuǎn)傳顯示，并可輸出脈沖信號(hào)或電流信號(hào)與微機(jī)聯(lián)網(wǎng)。  
  二、主要特點(diǎn)
 
當(dāng)流體以一定流速流經(jīng)設(shè)置在流場(chǎng)中的旋渦發(fā)生體時(shí)，在柱體的下游產(chǎn)生一對(duì)交替出現(xiàn)的而且排列整齊的渦列（渦街），先在柱體的一側(cè)產(chǎn)生，繼而在柱體的另一側(cè)產(chǎn)生。這一產(chǎn)生旋渦的理論首先由卡門（Karman）提出，命名為卡門渦街，并給出了頻率與流速的關(guān)系式，其中系數(shù)被命名為斯特羅哈爾數(shù)。
  三、技術(shù)參數(shù)
序號(hào)
項(xiàng)目
主要性能指標(biāo)
1
公稱通徑DN（mm）
DN10-DN300
2
流量范圍（m3/h）
0.2-1600
3
度等級(jí)
1級(jí)；（經(jīng)非線性修正可達(dá)0.5級(jí)）
4
量程化
10：1
5
重復(fù)性
＜基本誤差限的1/3
6
工作壓力（MPa）
1.0、1.6、2.5、4.0、6.4、10、16、25、32
7
表體材料
不銹鋼
8
介質(zhì)溫度（℃）
-30～120
9
壓力損失（MPa）
△P＝1.2×P×V×10-6
10
顯示方式
就地顯示、遠(yuǎn)傳顯示100m
11
輸出信號(hào)

①1脈沖　 ②2模擬4-20mA???????? ③3RS485接口
12
供電方式

內(nèi)裝電池：3V　 DC 外接電源：（6～24）V　DC（無原則信號(hào)外輸時(shí)）
13
環(huán)境條件
溫度：-30℃～55℃；濕度：5%～95%；大氣壓力：96KPa～106KPa
14
適用介質(zhì)
液體
15
防爆等級(jí)
Ex dⅡBT4
16
執(zhí)行標(biāo)準(zhǔn)

企業(yè)標(biāo)準(zhǔn)：JB/T 9249-1999檢定規(guī)程：JJG　 198-1994《速度式流量計(jì)檢定規(guī)程》
公稱通徑DN（mm）
流量范圍m3/h
10
0.2-2
15
0.3-3
25
1-10
40
3-30
50
40-40
80
10-100
100
20-200
150
45-450
200
80-800
250
120-1200
300
160-1600
   

江蘇金華自動(dòng)化儀表設(shè)備廠（江蘇金華儀表線纜有限公司）專業(yè)生產(chǎn)各種熱電偶、熱電阻、雙金屬溫度計(jì)、壓力表、壓力變送器、電磁流量計(jì)、渦街流量計(jì)、V錐流量計(jì)、孔板、超聲波流量計(jì)、各種數(shù)顯儀表、無紙記錄儀、儀表配件、熱電偶（阻）鎧裝絲材、電線電纜、管件閥門等。網(wǎng)址：http://www.jhyb.cn   郵箱：jinhua@jhyb.cn  商務(wù)咨詢電話：0517-86982766 0517-86998766   傳真：0517-86980766   QQ：1194478361

SDLUGB供應(yīng)渦街流量計(jì)，管道式渦街流量計(jì)，蒸汽流量計(jì)，渦街流量計(jì)廠家，渦街流量計(jì)價(jià)格

渦街流量計(jì)也稱之為旋渦流量計(jì)或卡門渦街流量計(jì)。綜合吸收發(fā)達(dá)國家先進(jìn)技術(shù)和總結(jié)多年研究生產(chǎn)經(jīng)驗(yàn)的基礎(chǔ)上進(jìn)行精心設(shè)計(jì)的產(chǎn)品，實(shí)現(xiàn)了產(chǎn)品智能化、標(biāo)準(zhǔn)化、系列化、通用化、生產(chǎn)模具化、確保產(chǎn)品質(zhì)量的美觀性。該產(chǎn)品具有電路先進(jìn)、功耗微低、量程比寬、結(jié)構(gòu)簡(jiǎn)單、阻力損失小、堅(jiān)固耐用、用途廣、使用壽命長(zhǎng)、工作穩(wěn)定、便于安裝調(diào)試等特點(diǎn)。
2技術(shù)指標(biāo)編輯
◆測(cè)量介質(zhì)： 氣體、液體、蒸氣
◆連接方式：法蘭卡裝式、法蘭式、插入式
◆口徑規(guī)格 法蘭卡裝式口徑選擇 25,32,50,80,100
◆法蘭連接式口徑選擇 100,150,200
◆流量測(cè)量范圍 正常測(cè)量流速范圍 雷諾數(shù)1.5×104～4×106；氣體5～50m/s; 液體0.5～7m/s
正常測(cè)量流量范圍 液體、氣體流量測(cè)量范圍見表2； 蒸氣流量范圍見表3
◆測(cè)量精度 1.0級(jí) 1.5級(jí)
◆被測(cè)介質(zhì)溫度:常溫–25℃～100℃，高溫–25℃～150℃ -25℃～250℃
◆輸出信號(hào) 脈沖電壓輸出信號(hào) 高電平8～10V 低電平0.7～1.3V
◆脈沖占空比約50%,傳輸距離為100m
◆脈沖電流遠(yuǎn)傳信號(hào) 4～20 mA,傳輸距離為1000m
◆儀表使用環(huán)境 溫度:-25℃～+55℃ 濕度:5～90% RH50℃
◆材質(zhì) 不銹鋼, 鋁合金
◆電源 DC24V或鋰電池3.6V
◆防爆等級(jí) 本安型iaIIbT3-T6，防護(hù)等級(jí) IP65
3原理編輯
在流體中設(shè)置三角柱型旋渦發(fā)生體，則從旋渦發(fā)生體兩側(cè)交替地產(chǎn)生有規(guī)則的旋渦，這種旋渦稱為卡門旋渦，旋渦列在旋渦發(fā)生體下游非對(duì)稱地排列。
渦街流量計(jì)是根據(jù)卡門渦街原理(Kármán Vortex Street)測(cè)量氣體、蒸汽或液體的體積流量、標(biāo)況的體積流量或質(zhì)量流量的體積流量計(jì)。并可作為流量變送器應(yīng)用于自動(dòng)化控制系統(tǒng)中。
渦街流量計(jì)是應(yīng)用流體振蕩原理來測(cè)量流量的，流體在管道中經(jīng)過渦街流量變送器時(shí)，在三角柱的旋渦發(fā)生體后上下交替產(chǎn)生正比于流速的兩列旋渦，旋渦的釋放頻率與流過旋渦發(fā)生體的流體平均速度及旋渦發(fā)生體特征寬度有關(guān)，可用下式表示：
式中:
為旋渦的釋放頻率，單位為Hz；v為流過旋渦發(fā)生體的流體平均速度，單位為m/s；d為旋渦發(fā)生體特征寬度，單位為m；St為斯特勞哈爾數(shù)（Strouhal number），無量綱，它的數(shù)值范圍為0.14－0.27。
St是雷諾數(shù)的函數(shù)，
。
當(dāng)雷諾數(shù)Re在
范圍內(nèi)，St值約為0.2。在測(cè)量中，要盡量滿足流體的雷諾數(shù)在
，此時(shí)旋渦頻率
。
由此，通過測(cè)量旋渦頻率就可以計(jì)算出流過旋渦發(fā)生體的流體平均速度v，再由式
可以求出流量q，其中A為流體流過旋渦發(fā)生體的截面積。
4工作原理編輯
渦街流量計(jì)是應(yīng)用卡門渦街原理和現(xiàn)代電子技術(shù)設(shè)計(jì)而制造的一種流量計(jì)，旋渦的發(fā)生頻率與
流體的速度成正比，在一定條件下，符合下式：
（式中f:旋渦發(fā)生頻率 v:流速 d:三角柱寬度 St：斯特勞哈數(shù)）
流體旋渦對(duì)三角柱產(chǎn)生交替變化的壓力，由壓電信號(hào)傳感器檢測(cè)成電信號(hào)經(jīng)前置放大器進(jìn)行放大，
變成標(biāo)準(zhǔn)電信號(hào)輸出。
VA型系列渦街流量計(jì)可以對(duì)廣泛的氣體（包括蒸汽）和液體進(jìn)行容積計(jì)量，配接流量積算儀和溫度、壓力傳感器可進(jìn)行質(zhì)量運(yùn)算及各種參數(shù)顯示。
5特點(diǎn)編輯
一、結(jié)構(gòu)簡(jiǎn)單而牢固，無可動(dòng)部件，可靠性高，長(zhǎng)期運(yùn)行十分可靠。
二、安裝簡(jiǎn)單，維護(hù)十分方便。
三、檢測(cè)傳感器不直接接觸被測(cè)介質(zhì)，性能穩(wěn)定，壽命長(zhǎng)。
四、輸出是與流量成正比的脈沖信號(hào)，無零點(diǎn)漂移，精度高。
五、測(cè)量范圍寬，量程比可達(dá)1：10。
六、壓力損失較小，運(yùn)行費(fèi)用低，更具節(jié)能意義。
在一定的雷諾數(shù)范圍內(nèi),輸出信號(hào)頻率不受流體物理性質(zhì)和組份變化的響,儀表系數(shù)僅與旋渦發(fā)生體的形狀和尺寸有關(guān),測(cè)量流體體積流量時(shí)無需補(bǔ)償，調(diào)換配件后一般無需重新標(biāo)定儀表系數(shù)。
應(yīng)用范圍廣，蒸汽、氣體、液體的流量均可測(cè)量。
檢定周期為二年。
LUGB型渦街流量傳感器應(yīng)用內(nèi)徑范圍為25-300mm（滿管式），KTLUI型插入式渦街流量傳感器應(yīng)用內(nèi)徑范圍為350-1200mm(插入式),滿管式測(cè)量液體精度為1%，測(cè)量蒸汽和氣體精度為1.5%，插入式測(cè)量液體精度為2%，測(cè)量蒸汽和氣體精度為2.5%，被測(cè)介質(zhì)溫度為-20~150℃、-40~250℃、+100~350℃（僅管式），輸出信號(hào)為三線制電壓脈沖，三線制4-20mA、二線制4-20mA。
該公司產(chǎn)品分類： 校驗(yàn)儀表 儀表配件 熱電阻 熱電偶 流速型流量計(jì) 節(jié)流裝置 非接觸式液位計(jì) 接觸式液位計(jì) 電容式壓力變送器 擴(kuò)散貴壓力變送器 其他儀表 溫度系列 流量系列 液位系列 壓力系列

DYLU系列渦街流量計(jì)

產(chǎn)品介紹:
一、主要特點(diǎn)：

DYLUGB型渦街流量傳感器，廣泛用于各種行業(yè)氣體、液體、蒸汽流量的計(jì)量，也可測(cè)量含有微小顆粒，雜質(zhì)的混濁液體，并可作為流量變送器用于自動(dòng)化控制系統(tǒng)中。DYLUGB型渦街流量傳感器防爆型，符合GB3836－83《爆炸性環(huán)境用防爆電氣設(shè)備》的有關(guān)規(guī)定，防爆標(biāo)志為“ia IICT4”，該儀表適用于工廠C級(jí)T4組及以下的爆炸性場(chǎng)所。

■ 產(chǎn)品特點(diǎn)
A.壓力損失小，量程范圍寬，范圍度達(dá)10～40。B.無可動(dòng)部件，性能穩(wěn)定，結(jié)構(gòu)簡(jiǎn)單便于安裝和維護(hù)。C.采用消擾電路和抗振傳感頭，使儀表具有一定抗環(huán)境振動(dòng)性能。D.可測(cè)介質(zhì)溫度達(dá)＋350℃（＋450℃）。
 
■ 主要技術(shù)參數(shù)

公稱口徑

DN25,40,50,80,100,125,150,200,250,300

適用介質(zhì)

氣體  液體  蒸汽 

可測(cè)介質(zhì)溫度

-40℃～150℃；-40℃～280℃；-40℃～350℃；-40℃～450℃

公稱壓力

2.5MPa(>2.5MPa 協(xié)商供貨)

精度等級(jí)

1.5級(jí)

測(cè)量范圍

見表4、表5、表6

輸出信號(hào)

電壓脈沖:低電平≤1V,高電平≥2.5V,負(fù)載電阻≥100KΩ

4～20mA轉(zhuǎn)換精度±0.5%滿度值,負(fù)載電阻<300Ω(24VDC)

現(xiàn)場(chǎng)液晶顯示:瞬時(shí)流量6位顯示(m3/h或kg/h,t/h),轉(zhuǎn)換精度±0.1%;累積流量8位顯示,(m3,kg,t),轉(zhuǎn)換精度±0.1%

供電電源

電壓脈沖輸出時(shí):+12VDC或+24VDC

4～20mA輸出時(shí):+19VDC～+30VDC

現(xiàn)場(chǎng)液晶顯示:電池供電3.6V,1節(jié)1號(hào)鋰電池,使用壽命大于3年，外部供電+12VDC或+24VDC可實(shí)現(xiàn)帶背光的液晶顯示(訂貨注明)

環(huán)境溫度 

電壓脈沖輸出:-30℃～+65℃

 

4～20mA輸出:-10℃～+55℃

 

現(xiàn)場(chǎng)液晶顯示:-25℃～+55℃

防爆標(biāo)志 

iaIICT4

表體材料 

1Cr18Ni9Ti(其他材料協(xié)議供貨)

全智能型儀表 

輸出信號(hào):體積流量或質(zhì)量流量

現(xiàn)場(chǎng)液晶顯示:6位循環(huán)顯示,瞬時(shí)流量、壓力、溫度；8位顯示累積量

二、DYP2000系列型譜：

DYL

 

流量?jī)x表

 

U

 

渦街

 

G

 

流量計(jì)

S

 

智能流量變送器（4～20mA輸出）

 

B

 

應(yīng)力式敏感元件

 

-2

 

法蘭卡裝連接

 

2

 

液體介質(zhì)

3

 

氣體介質(zhì)

4

 

蒸汽介質(zhì)

 

02

  

公稱通徑Φ20～25mm（按用戶要求）

03

 

公稱通徑Φ32mm

04

 

公稱通徑Φ40mm

05

 

公稱通徑Φ50mm

08

 

公稱通徑Φ80mm

10

 

公稱通徑Φ100mm

12

 

公稱通徑Φ125mm

15

 

公稱通徑Φ150mm

20

 

公稱通徑Φ200mm

25

 

公稱通徑Φ250mm

30

 

公稱通徑Φ300mm

 

C

 

碳鋼法蘭

S

 

不銹鋼法蘭

 

1

三線制電壓脈沖輸出

2

二線制電流4～20mADC輸出+本地顯示

3

脈沖+本地顯示

4

二線4～20mADC+本地顯示（鋰電池供電）

5

本地顯示（鋰電池供電）

DXLUGBDXLUGB渦街流量計(jì)

 DXLUGB/E型渦街流量計(jì)廣泛適用于石油、化工、冶金、熱力、紡織、造紙等行業(yè)對(duì)過熱蒸汽、飽和蒸汽、壓縮空氣和一般氣體（氧氣、氮?dú)鈿錃、天然氣、煤氣等?、水和液體（如：水、汽油、    酒 精、苯類等）的計(jì)量和控制.
 
       二、           產(chǎn)品的種類和適用范圍
a）       DXLUGB系列滿管型壓電式渦街流量計(jì)
b）       DXLUGB系列插入型壓電式渦街流量計(jì)
c）       DXLUGE系列滿管型電容式渦街流量計(jì)
d）       DXLUGE系列插入型電容式渦街流量計(jì)
e）       DXLUGB/E系列電池供電型渦街流量計(jì)
f）      潛水型/分體型渦街流量計(jì)（協(xié)議訂貨）
g）       多功能曲線紀(jì)錄積算儀，帶P/T補(bǔ)償功能、中文液晶顯示
h）       智能流量積算儀，數(shù)碼管顯示

三、DXLUGB/E系列渦街流量?jī)x表參比條件下渦街流量傳感器工況流量范圍表

儀表口徑
（mm）
液體
氣體
測(cè)量范圍
（m3/h）
輸出頻率范圍
（Hz）
測(cè)量范圍
（m3/h）
輸出頻率范圍
（Hz）
25
1.2～16
25～336
 
8.8～55
190～1140
40
2～40
10～200
27～205
140～1040
50
3～60
8～160
35～380
94～1020
80
6.5～130
4.1～82
86～1100
55～690
100
15～220
4.7～69
133～1700
42～536
150
30～450
2.8～43
347～4000
33～380
200
45～800
2～31
560～8000
22～315
250
65～1250
1.5～25
890～11000
18～221
300
95～2000
1.2～24
1360～18000
16～213
（300）
100～1500
5.5～87
 
1560～15600
85～880
（400）
180～3000
5.6～87
2750～27000
85～880
（500）
300～4500
5.6～88
4300～43000
85～880
（600）
450～6500
5.7～89
6100～61000
85～880
（800）
750～10000
5.7～88
11000～110000
85～880
（1000）
1200～1700
5.8～88
17000～170000
85～880
>（1000）
協(xié)議
 
協(xié)議
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
注：表中（300）～（1000）口徑為插入式
 四、DXLUGB/E渦街流量計(jì)選型表（符合JB/T9294-1999標(biāo)準(zhǔn)）
型    譜
說    明
LU
 
渦街流量?jī)x表
G
 
傳感器
檢測(cè)
方式
 
B
 
壓電式傳感器
E
 
電容式傳感器
連接方式
 
1
僅對(duì)滿管型
法蘭連接型
2
僅對(duì)滿管型
法蘭卡裝型
3
僅對(duì)插入型
簡(jiǎn)易插入型
4
僅對(duì)插入型
球閥插入型
測(cè)量介質(zhì)
 
2
 
 
液體
3
 
 
氣體
4
 
 
蒸汽
公稱通徑
 
02
…
30
 
 
 
DN25
…              單位：mm
DN300
使用環(huán)境
P
 
普通型
B
 
防爆型
輸出信號(hào)
 
1
 
脈沖輸出
2
 
4～20mA電流輸出，液晶顯示
3
 
RS-485通訊
4
 
電池供電，不帶溫度、壓力補(bǔ)償
5
 
溫壓補(bǔ)償一體，4～20mA電流輸出型
6
 
溫壓補(bǔ)償一體，電池供電型
選型
說明
例如： DXLUGE2405-P2 滿管型電容式渦街流量計(jì)，法蘭卡裝型連接，介質(zhì)為蒸汽
                   儀表通徑為DN50,普通 4～20mA電流信號(hào)輸出
 
五、確定流量范圍和儀表口徑的基本步驟：
（1）被測(cè)介質(zhì)的名稱、組份
（2）工作狀態(tài)的最小、常用、最大流量
（3）介質(zhì)的、常用、壓力和溫度
（4）工作狀態(tài)下介質(zhì)的粘度
 
六、常用氣體介質(zhì)的標(biāo)準(zhǔn)狀態(tài)密度表（0℃，絕壓P=0.1MPa）
氣體名稱
密度（kg/m3）
氣體名稱
密度（kg/m3）
空氣（干）
1.2928
乙炔
1.1717
氮?dú)?/div>
1.2506
乙烯
1.2604
氧氣
1.4289
丙烯
1.9140
氬氣
1.7840
甲烷
0.7167
氖氣
0.9000
乙烷
1.3567
氨氣
0.7710
丙烷
2.0050
氫氣
0.08988
丁烷
2.7030
一氧化碳
1.97704
天然氣
0.8280
二氧化碳
1.3401
煤制氣
0.8020

 

LUGB智能渦街流量計(jì)

 

  LUGB系列智能渦街流量計(jì),主要用于工業(yè)管道介質(zhì)流體的流量測(cè)量,如氣體、液體、蒸氣等多種介質(zhì)。其特點(diǎn)是壓力損失小,量程范圍大,精度高,在測(cè)量工況體積流量時(shí)幾乎不受流體密度、壓力、溫度、粘度等參數(shù)的影響。無可動(dòng)機(jī)械零件，因此性高,維護(hù)量小。儀表參數(shù)能穩(wěn)定。本儀表采用壓電應(yīng)力式傳感器,性高,可在-20℃～+250℃的工作溫度范圍內(nèi)工作。有模擬標(biāo)準(zhǔn)信號(hào),也有數(shù)字脈沖信號(hào)輸出,容易與計(jì)算機(jī)等數(shù)字系統(tǒng)配套使用,是一種比較、理想的流量?jī)x表。

 
※原理
 
在流體中設(shè)置三角柱型旋渦發(fā)生體，則從旋渦發(fā)生體兩側(cè)交替地產(chǎn)生有規(guī)則的旋渦，這種旋渦稱為卡門旋渦，如右圖所示，旋渦列在旋渦發(fā)生體下游非對(duì)稱地排列！　≡O(shè)旋渦的發(fā)生頻率為f，被測(cè)介質(zhì)平均流速為 ，旋渦發(fā)生體迎流面寬度為d，表體通徑為D，即可得到以下關(guān)系式：
　f=SrU1/d=SrU/md 　　　　　　　　　　　　　　　　　　　　(1)式中　　U1--旋渦發(fā)生體兩側(cè)平均流速，m/s；　　　　Sr--斯特勞哈爾數(shù)；　　　　m--旋渦發(fā)生體兩側(cè)弓形面積與管道橫截面面積之比　　　　　　　　
　管道內(nèi)體積流量qv為　　　　　　　　　　　　qv=πD2U/4=πD2mdf/4Sr 　　　　　　　　　　　　　　　　(2)　　　　　　　　　　　　K=f/qv=[πD2md/4Sr]-1 　　　　　　　　　　　　　　　　 (3)式中 K--流量計(jì)的儀表系數(shù)，脈沖數(shù)/m3(P/m3)！　除與旋渦發(fā)生體、管道的幾何尺寸有關(guān)外，還與斯特勞哈爾數(shù)有關(guān)。斯特勞哈爾數(shù)為無量綱參數(shù)，它與旋渦發(fā)生體形狀及雷諾數(shù)有關(guān)，圖2所示為圓柱狀旋渦發(fā)生體的斯特勞哈爾數(shù)與管道雷諾數(shù)的關(guān)系圖。由圖可見，在ReD=2×104～7×106范圍內(nèi)，Sr可視為常數(shù)，這是儀表正常工作范圍。當(dāng)測(cè)量氣體流量時(shí)，VSF的流量計(jì)算式為
 
　　　　　　　　　　 　　　　　　　　　　　　　　　　(4)
圖2 斯特勞哈爾數(shù)與雷諾數(shù)關(guān)系曲線
式中 qVn，qV--分別為標(biāo)準(zhǔn)狀態(tài)下(0oC或20oC，101.325kPa)和工況下的體積流量，m3/h； 　　 Pn，P--分別為標(biāo)準(zhǔn)狀態(tài)下和工況下的絕對(duì)壓力，Pa；　　 Tn，T--分別為標(biāo)準(zhǔn)狀態(tài)下和工況下的熱力學(xué)溫度，K；　　 Zn，Z--分別為標(biāo)準(zhǔn)狀態(tài)下和工況下氣體壓縮系數(shù)。 　　由上式可見，VSF輸出的脈沖頻率信號(hào)不受流體物性和組分變化的影響，即儀表系數(shù)在一定雷諾數(shù)范圍內(nèi)僅與旋渦發(fā)生體及管道的形狀尺寸等有關(guān)。但是作為流量計(jì)在物料平衡及能源計(jì)量中需檢測(cè)質(zhì)量流量，這時(shí)流量計(jì)的輸出信號(hào)應(yīng)同時(shí)監(jiān)測(cè)體積流量和流體密度，流體物性和組分對(duì)流量計(jì)量還是有直接影響的。
　　渦街流量計(jì)便是依據(jù)卡門旋渦原理進(jìn)行封閉管道流體流量測(cè)量的新型流量計(jì)。因其具有良好的介質(zhì)適應(yīng)能力，無需溫度壓力補(bǔ)償即可直接測(cè)量蒸汽、空氣、氣體、水、液體的工況體積流量，配備溫度、壓力傳感器可測(cè)量標(biāo)況體積流量和質(zhì)量流量，是節(jié)流式流量計(jì)的理想替代產(chǎn)品。　　為提高渦街流量計(jì)的耐高溫及抗振動(dòng)性能，我公司新近開發(fā)出了HLUG改進(jìn)型渦街流量傳感器，因其獨(dú)特的結(jié)構(gòu)和選材使該傳感器可在高溫(350℃)、強(qiáng)振動(dòng)(≤1g)的惡劣工況下使用！　≡趯(shí)際應(yīng)用中，往往最大流量遠(yuǎn)低于儀表的上限值，隨著負(fù)荷的變化，最小流量又往往會(huì)低于儀表的下限值，儀表并非工作在它的工作段，為了解決這一問題，通常采用在測(cè)量處縮徑提高測(cè)量處的流速，并選用較小口徑的儀表以利于儀表的測(cè)量，但是這種變徑方式必須在變徑管與儀表間有長(zhǎng)度為15D以上的直管段進(jìn)行整流，使加工、安裝都不方便。我公司研制的縱斷面形狀為圓弧的LGZ變徑整流器，具有整流、提高流速及改變流速分布多重作用，其結(jié)構(gòu)尺寸小，僅為工藝管內(nèi)徑的1/3，與渦街流量計(jì)作成一體，不僅不需要另外附加一段直管段，還可以降低對(duì)工藝管直管段的要求，安裝非常方便。
為了使用方便，電池供電的本地顯示型渦街流量計(jì)采用微功耗高新技術(shù)，采用鋰電池供電可不間斷運(yùn)行一年以上，節(jié)省了電纜和顯示儀表的采購安裝費(fèi)用，可就地顯示瞬時(shí)流量、累積流量等。溫度補(bǔ)償一體型渦街流量計(jì)還帶有溫度傳感器，可以直接測(cè)量出飽和蒸汽的溫度并計(jì)算出壓力，從而顯示飽和蒸汽的質(zhì)量流量。溫壓補(bǔ)償一體型帶有溫度、壓力傳感器，用于氣體流量測(cè)量可直接測(cè)量出氣體介質(zhì)的溫度和壓力，從而顯示氣體的標(biāo)況體積流量！魷y(cè)量介質(zhì)： 氣體、液體、蒸氣◆口徑規(guī)格 法蘭卡裝式口徑選擇 25,32,50,80,100◆法蘭連接式口徑選擇 100,150,200◆流量測(cè)量范圍 正常測(cè)量流速范圍 雷諾數(shù)1.5×104～4×106；氣體5～50m/s;       液體0.5～7m/s 正常測(cè)量流量范圍 液體、氣體流量測(cè)量范圍見表2；               蒸氣流量范圍見表3◆測(cè)量精度 1.0級(jí)  1.5級(jí)◆被測(cè)介質(zhì)溫度:常溫–25℃～100℃◆高溫–25℃～150℃  -25℃～250℃◆輸出信號(hào) 脈沖電壓輸出信號(hào) 高電平8～10V    低電平0.7～1.3V◆脈沖占空比約50%,傳輸距離為100m◆脈沖電流遠(yuǎn)傳信號(hào) 4～20 mA,傳輸距離為1000m◆儀表使用環(huán)境 溫度:-25℃～+55℃  濕度:5～90%    RH50℃◆材質(zhì) 不銹鋼, 鋁合金◆電源 DC24V或鋰電池3.6V◆防爆等級(jí) 本安型iaIIbT3-T6    防護(hù)等級(jí) IP65
產(chǎn)品選型

代號(hào)
通徑
流量范圍㎡/h
LUGB-25
DN25
0.44~14(液體)
9.3~124(氣體)
蒸汽流量請(qǐng)查看說明書，DN300以上推薦使用插入式渦街流量計(jì)
LUGB-32
DN32
0.73~25(液體)
15.3~203(氣體)
LUGB-40
DN40
1.2~39(液體)
23.9~318(氣體)
LUGB-50
DN50
1.8~60(液體)
37.3~496(氣體)
LUGB-80
DN80
4.6~155(液體)
95.5~1270(氣體)
LUGB-100
DN100
7.1~241(液體)
149~1985(氣體)
LUGB-150
DN150
16~544(液體)
336~4466(氣體)
LUGB-200
DN200
28.3~967(液體)
597~7939(氣體)
 
代號(hào)
功能1
N
無溫壓補(bǔ)償
Y
有溫壓補(bǔ)償
 
代號(hào)
輸出型號(hào)
F1
4-20mA輸出(二線制)
F2
4-20mA輸出(三線制)
F3
RS485通訊接口
 
代號(hào)
被測(cè)介質(zhì)
J1
液體
J2
氣體
J3
蒸汽
 
代號(hào)
連接方式
L1
法蘭卡裝式
L2
法蘭連接式
 
代號(hào)
功能2
E1
1.0級(jí)
E2
1.5級(jí)
T1
常溫
T2
高溫
T3
蒸汽
P1
1.6MPa
P2
2.5MPa
P3
4.0MPa
D1
內(nèi)部3.6V供電
D2
DC24V供電
B1
不銹鋼
B2
碳鋼

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