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溫壓補(bǔ)償蒸汽流量計(jì)，測(cè)量蒸汽流量計(jì)，中山渦街流量計(jì)

1、使用條件及技術(shù)參數(shù)環(huán)境溫度：-40℃～55℃； 相對(duì)濕度：5%～90%；大氣壓力：86～106kPa；被測(cè)流體是單相流體或可以認(rèn)為是單相的流體；流量計(jì)上下游有符合表1規(guī)定的直管段。表1 儀表安裝的直管段要求（D為管道內(nèi)徑） 表 1管道情況上游 下游同心收縮管，全開(kāi)閘閥15D 5D90°直角彎頭20D 5D同平面兩個(gè)90°彎頭25D 5D半開(kāi)閘閥50D 5D不同平面兩個(gè)90°彎頭40D 5D帶整流管束12D 3D2、技術(shù)參數(shù)公稱通徑：25～300mm； 公稱壓力：2.5MPa、4.0MPa；測(cè)量介質(zhì)：液體、氣體、蒸氣； 精度等級(jí)：1.0級(jí)；PDF 文件使用 "pdfFactory" 試用版本創(chuàng)建炣www.fineprint.cn4介質(zhì)溫度：-40℃～+320℃； 重復(fù)性：≤0.2%；線性度：≤±1.0%； 本體材質(zhì)：1Cr18Ni9Ti；連接方式：法蘭卡裝式； 負(fù)載電阻：最大負(fù)載電阻不超過(guò)350Ω供電電源：24VDC； 輸出信號(hào)：電流脈沖；流量范圍：見(jiàn)表2及其說(shuō)明A與B表2 WJG系列流量計(jì)范圍表表 2流量范圍（m3/h）流量計(jì)型號(hào)公稱通徑DN（mm） 液體氣體 蒸汽WJG 10 0～3 1～50 1～60WJG 15 0～5 2～60 1～80WJG 20 0～8 5～100 5～100WJG 25 0.5～15 5～136 5～120WJG 40 1～36 8～360 6～286WJG 50 2.7～56 3.5～420 10～380WJG 65 3.1～90 10～710 10～656WJG 80 3.1～130 10～1360 10～1030WJG 100 5～200 25～2100 30～1630WJG 125 5～300 30～2800 50～2360WJG 150 5～420 80～4100 100～3860WJG 200 10～780 200～8600 200～6860WJG 250 20～1460 300～14430 300～1250WJG 300 50～2100 300～18850 300～16000注 1：表2 中所列流量范圍是在下述狀態(tài)下標(biāo)定的：對(duì)于氣體是在溫度為0℃，1個(gè)標(biāo)準(zhǔn)大氣壓下的空氣（ρ0=1.293kg/m3）；對(duì)于液體是為4℃的水（ρ0=1000kg/m3）；對(duì)于蒸汽是絕對(duì)壓力為0.4Mpa的干飽和蒸汽（ρ0=2.1628kg/m3）；當(dāng)介質(zhì)條件不是上述條件或用于其它介質(zhì)時(shí)，流量計(jì)的流量范圍受到密度和粘度影響。此時(shí)，流量范圍按以下方法確定：說(shuō)明：A、下限流量：（1） 可根據(jù)表2給出的下限流量Qmin，基準(zhǔn)介質(zhì)密度ρ0（氣體ρ0=1.293kg/m3；液體ρ0=1000kg/m3；蒸汽ρ0=2.1628kg/m3）和使用介質(zhì)密度ρ，按下式計(jì)算不同使用介質(zhì)密度下限流量Qminρ；Qminρ=Qmin ρ0/ρ（m3/h）（2） 可根據(jù)使用介質(zhì)的運(yùn)動(dòng)粘度ν，按下式計(jì)算粘度下限流量QminνQminν=6νD ×104（m3/h）式中：D——管道內(nèi)徑（mm） ν——運(yùn)動(dòng)粘度（m2/s）比較Qminρ和Qminν，其中取數(shù)值較大的一個(gè)作為該型號(hào)流量計(jì)在該種介質(zhì)使用時(shí)的下限流量。說(shuō)明：B、上限流量各種不同介質(zhì)的使用上限流量如表2所示。一般情況下，液體的上限流速為6m/s；氣體或蒸汽的上限流速為45m/s。注2：智能渦街流量計(jì)的阻力系數(shù)Cd=2.2：流量計(jì)在不同的流量下的阻力損失可按下式計(jì)算：式中：△P——阻力損失（Pa）PDF 文

LUGB系列智能渦街流量計(jì)

 

1、概述
   渦街流量?jī)x表是根據(jù)卡門(mén)渦街理論，利用了流體的自然震動(dòng)原理，以壓電晶體或差動(dòng)電容作為檢測(cè)部件而制成的一種速度式流量?jī)x表。
該儀表具有無(wú)可動(dòng)部件、測(cè)量范圍度大、介質(zhì)適應(yīng)性廣、測(cè)量精度高、檢定周期長(zhǎng)、傳輸信號(hào)距離遠(yuǎn)、壓力損失小、結(jié)構(gòu)簡(jiǎn)單、運(yùn)行、使用壽命長(zhǎng)、安裝維護(hù)方便等許多顯著優(yōu)點(diǎn)？蓮V泛應(yīng)用于石油化工、冶金機(jī)械、食品、造紙，以及城市管道供熱、供水、煤氣等行業(yè)的各種液體氣體、蒸汽等單相流體的工藝計(jì)量和節(jié)能管理。
2、產(chǎn)品特點(diǎn)
●采用抗機(jī)械震動(dòng)，抗沖擊和抗臟污的結(jié)構(gòu)新設(shè)計(jì)。
●采用進(jìn)的集成電路，信號(hào)處理精度高，高抗干擾性，性高。
●    可選用加寬量程型號(hào)，獲得的小流量性能和擴(kuò)寬的流量范圍。
●    可選用電容式流量計(jì)，抗震性能好，測(cè)量溫度達(dá)到400℃。
●    可選用潛水型流量計(jì)，允許浸泡在水中工作。
三、測(cè)量原理
    渦街流量?jī)x表是由設(shè)計(jì)在流場(chǎng)中的旋渦發(fā)生體、檢測(cè)探頭及相關(guān)的電子線路等組成。當(dāng)流體流經(jīng)三角柱形旋渦發(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(mén)渦街。斯特羅哈爾在卡門(mén)渦街理論的基礎(chǔ)上又提出了卡門(mén)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
圖1
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－－－－－－－－－－－－－－－－－－ 斯特羅哈爾系數(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，便產(chǎn)生一系列交變電信號(hào)，經(jīng)過(guò)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)）。

LY-LUGB渦街流量計(jì)法蘭安裝式渦街流量計(jì)

LY-LUGB渦街流量計(jì)采用的差動(dòng)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、小信號(hào)數(shù)據(jù)紊亂等問(wèn)題，并采用了獨(dú)特的傳感器封裝技術(shù)和防護(hù)措施，了產(chǎn)品的性。產(chǎn)品有基本型和復(fù)合型兩種型式，基本型測(cè)量單量信號(hào)；復(fù)合型可同時(shí)實(shí)現(xiàn)溫度、壓力、流量的測(cè)量。每種型式都有整體、分體結(jié)構(gòu)，以適應(yīng)不同的安裝環(huán)境。     該渦街流量計(jì)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(diǎn)？蓮V泛應(yīng)用于石油、化工、冶金、機(jī)械、食品、造紙，以及城市管道供熱、供水、煤氣等行業(yè)的各種低黏度液體、氣體、蒸汽等單相流體的工藝計(jì)量和節(jié)能管理。

更多儀表選型：http://jhlyzk.com/

HC- LUGB溫壓補(bǔ)償智能型渦街流量計(jì)

品牌 宏創(chuàng) 型號(hào) HC- LUGB
類型 溫壓補(bǔ)償智能型渦街流量計(jì) 測(cè)量范圍 40-5500（m3/h）
精度等級(jí) 1.5級(jí)、1.0級(jí)（） 、0.5級(jí)、0.2級(jí) 公稱通徑 25-200（mm）
適用介質(zhì) 液體，氣體，蒸汽 工作壓力 0-16（MPa）
工作溫度 -40-350（℃）

●   表體中同時(shí)集成溫壓補(bǔ)償補(bǔ)償功能，可測(cè)量流體的標(biāo)準(zhǔn)體積流量或標(biāo)準(zhǔn)質(zhì)量流量！    全智能化、數(shù)字化電路設(shè)計(jì)，可自動(dòng)補(bǔ)償被測(cè)流體密度或標(biāo)況體積計(jì)算！   的數(shù)字濾波和修正功能使流量測(cè)量更加！   電池供電型無(wú)需外接電源既可連續(xù)工作兩年以上！   點(diǎn)陣漢字液晶顯示，使用操作更方便。技術(shù)參數(shù)                    ●  測(cè)量介質(zhì)     氣體、水、飽和蒸汽、過(guò)熱蒸汽、天然氣●  公稱口徑      DN25 — DN500●  介質(zhì)溫度      - 40℃—+150℃ ； -40℃—+280℃ ；-40℃—+350℃ ； 

      -40℃—+420℃（需選配傳感頭不斷流拆裝型）●   精度等級(jí)       1.5級(jí)、1.0級(jí)（） 、0.5級(jí)、0.2級(jí)（需協(xié)議供貨）●  渦街可測(cè)流量范圍     液體：0.4 m/s —10 m/s     氣體、蒸汽：4m/s －－ 70 m/s

該公司產(chǎn)品分類： 物/液位儀器儀表 指針式帶法蘭的壓力變送器 單法蘭液位變送器 雙法蘭液位變送器 平衡罩式液位變送器 電容式法蘭液位變送器 擴(kuò)散硅液位變送器 直桿式液位變送器 投入式液位變送器 液位變送器 橋架 儀表柜 電線電纜 其他配件 校驗(yàn)儀表 壓力發(fā)生裝置 彩色記錄儀 無(wú)紙記錄儀 記錄儀 顯示儀表 孔板流量計(jì)

LUGB系列渦街流量計(jì)

氣體渦輪流量計(jì)、液體渦輪流量計(jì)。氣體渦輪流量計(jì)主要用來(lái)測(cè)量天然氣等氣體，精度高，使用方便。液體渦輪流量計(jì)主要用于化工，石油等行業(yè)，適合測(cè)量柴油，汽油，煤油，食用油、等介質(zhì)，連接方式有法蘭連接和螺紋連接兩種，口徑一般大于30mm為法蘭連接，小于30mm為螺紋連接。我公司還生產(chǎn)渦輪流量變送器，即僅可以傳輸信號(hào)，還有就地顯示型渦輪流量計(jì)（僅表頭顯示），智能型渦輪流量計(jì)（既可以表頭顯示又可以輸出信號(hào)），歡迎各位前來(lái)選購(gòu)。渦輪流量計(jì)主要是靠管道內(nèi)葉輪的轉(zhuǎn)動(dòng)測(cè)量流量，葉輪的材質(zhì)為316不銹鋼的，渦輪流量計(jì)材質(zhì)均為304不銹鋼。

該公司產(chǎn)品分類： 儀器

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(lái)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(lái)測(cè)量氣體的流量，操作簡(jiǎn)便，無(wú)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(guò)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(guò)程顯示儀    E+H（恩德斯豪斯）RIA 251 過(guò)程顯示儀    E+H（恩德斯豪斯）RIA 450 過(guò)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

E+H 50W2H-H50A1A10A7AW  DN=200E+H 50W3H-H50A1A10A7AW  DN=300E+H 50W1F-H50A1A10B7AWE+H 50P50-AA1A1AA0AAAAE+H 80I50-AD2WAAAAA4ADE+H 50P40-EA2A1AA0AAAAE+H 80F40-AD2SAAAAAAE+H 83F40-AD2SAAAANBE+H FDU80-RG2SE+H 50P80-EA1A1AA0BAAAE+H 80F50-AD2SAAAABAABAE+H 50W65-HA0A1A0AAAWE+H 50W80-HA0A1A1AAAWE+H 50W2F-HC0A1A1AAAWE+H 50W25-UAOA1AA0A4AAE+H FTL50-YJE2AA4G7AE+H FTC231-K11B4 L=500MME+H 53H04-KA0B1AC1AAHAJE+H 53H08-KA0B1AC1AAHAJE+H 50W40-UA0A1AA0AAAAE+H 50W50-UA0A1AA0AAAAE+H 50W25-UA0A1AA0AAAAE+H 72F80SE0-AA1AAA4AAAE+H 72F50SE0-AA1AAA4AAAE+H FTC260-AA4D1E+H 83F50-AFTSAAAAAAAE+H 53H80-A00B1AA0ABABE+H 53H40-A00B1AA1ABABE+H 53H15-A001AA0AAABE+H 50H40-UF0B1AA0AAADE+H CPM253-PR0150E+H CPF81-LH11C2E+H COM223-DX0005E+H CUM223-TU0005E+H CUS41-W2E+H CPK1-150A  15ME+H CPK1-150A  20ME+H 50P40-EA2A1AA0BAAAE+H 50P50-EA2A1AA0BAAAE+H 50P80-EA2A1AA0BAAAE+H 80M50-AS2AABAAAAA8E+H FTC51-AG1AA51C4 L1=1000MM L2=100MME+H PMP75-5AA1P21D4GAAAE+H 50W4H-HC0A1AA0AA4AAE+H FTL51-AGQ2DB4G7A  E+H FTM30-B1DA1E+H FTL51-AGR2DB4G5AE+H FTL51-FGR2BB4G5A L=1100MME+H 50P1F-AA1A1A0AAAAE+H 65F15-AE2AG1AABAAE+H 65F25-AE2AG1AABAAE+H FTL51-IAC2BB4E7A  L=300MME+H FTL51-IAC2BB4E7A  L=3000MME+H FMU232E-AA42E+H FTM50-4GG2A232AA  L=155MME+H FMU231A-AA31E+H 50W3H-HD0A1AA0A5AAE+H 65F15-AE2AG1AAAAAE+H 80E08-AD2SAABAAAAAE+H 80E08-AD2SAABAABAAE+H 72F50-SE0AA1DAA4AAE+H 72F40-SE0AA1DAA4AAE+H 72F1F-SE0AA1DAA4AAE+H 50P1F-EC0A1AACZAAAAE+H 72F40-SE1AA1AAA4AWE+H 72F15-SE1AA1AAA4AWE+H 50W25-UA0A1AA0A4AAE+H 72W50-SE0AAA1AAC4AAE+H 50P25-EA0A1A0AAAAE+H 80F80-AD2SAAAAAAE+H 80F25-AD2SAAAAAAE+H 83F80-AD2SAAAAAAE+H 83F25-AD2SAAAAAAE+H 50W1F-UC0A1AA0A4AAE+H 50W1H-HC0A1AA0AAAA 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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(guó)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(mén)渦街現(xiàn)象，當(dāng)流體環(huán)繞通過(guò)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(guò)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(wú)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(wú)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(guò)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(mén)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(wú)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(jiàn)，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(jiàn)，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(mén)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(wú)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(kāi)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(wèn)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(gòu)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(jiàn)表2；蒸氣流量范圍見(jiàn)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(shuō)明書(shū)，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(wú)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(wú)零點(diǎn)漂移，可靠性高。     通過(guò)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(wú)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(kāi)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(wú)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(guò)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(wú)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(guò)程中的各個(gè)環(huán)節(jié)，按產(chǎn)品說(shuō)明書(shū)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?tīng)査土髁坑?jì) 皮托管流量計(jì) 彩屏無(wú)紙記錄儀 藍(lán)屏無(wú)紙記錄儀 基本型無(wú)紙記錄儀 無(wú)紙記錄儀 記錄儀表 磁性浮子液位計(jì) 浮球開(kāi)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(mén)渦街。斯特羅哈爾在卡門(mén)渦街理論的基礎(chǔ)上又提出了卡門(mén)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(wú)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(wú)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(wú)

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(wú)

有

有

溫壓補(bǔ)償

無(wú)

無(wú)

有

通訊接口

無(wú)

無(wú)

RS485

實(shí)時(shí)記錄

無(wú)

無(wú)

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

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