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LY-LUGB渦街流量計法蘭安裝式渦街流量計

LY-LUGB渦街流量計采用的差動技術,配合隔離、屏蔽、濾波等措施,克服了同類產品抗震性差、小信號數(shù)據(jù)紊亂等問題,并采用了獨特的傳感器封裝技術和防護措施,了產品的性。產品有基本型和復合型兩種型式,基本型測量單量信號;復合型可同時實現(xiàn)溫度、壓力、流量的測量。每種型式都有整體、分體結構,以適應不同的安裝環(huán)境。     該渦街流量計具有量程比寬,精度高,安裝維護方便和介質適應性廣等一系列優(yōu)點。可廣泛應用于石油、化工、冶金、機械、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量和節(jié)能管理。

更多儀表選型:http://jhlyzk.com/

E+H渦街流量計

E+H流量計

E+H電磁流量計E+H  E+H質量流量計E+H  E+H渦街流量計E+H  E+H超聲波流量計E+H

E+H流量儀表:1、E+H電磁流量計:提供了高量程比的高精度測量?捎糜趪栏竦男l(wèi)生場合,并提供適用于危險場合的安全認證。型號有:50W/53W,50P/53P,50H/53H,10W,10H,10P,23H,23P,55S/55H55S電磁流量計   55H電磁流量計

2、E+H渦街流量計:用來測量氣體、蒸氣和液體的流量。安裝成本低,壓損小,長時間穩(wěn)定性及寬動態(tài)測量范圍。主要型號有:72F,73F,72W   Prowirl 72W渦街流量計   Prowirl 72F渦街流量計  Prowirl 73F渦街流量計  Prowirl 73W渦街流量計

3、E+H熱式質量流量計:用來測量氣體的流量,操作簡便,無壓損及寬動態(tài)測量范圍。主要型號有:80/83F,80/83E,80/83H,80/83M,80/83A,80/83I,40E,84F,84M 84F質量流量計  84A質量流量計  84M質量流量計  CNGmass質量流量計  40E質量流量計 

4、E+H超聲波流量計:外部安裝,非接觸測量。安裝簡便,不干擾工藝過程,適用于腐蝕性介質,高壓、衛(wèi)生場合。型號有: 90/93W,93/90A,90/93U/C93T超聲波流量計   92F超聲波流量計

   E+H(恩德斯豪斯)t-switch 熱式氣體流量測量    E+H(恩德斯豪斯)t-trend 熱式氣體流量測量    E+H(恩德斯豪斯)能量計算儀 RMC 621    E+H(恩德斯豪斯)能量計算儀 RMS 621    E+H(恩德斯豪斯)Magphant 插入式電磁流量計    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熱式氣體流量測量

E+H能量計算儀RMC621/RMS621

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該公司產品分類: RBT ABB VEGA P+F 倍加福 FESTO 費斯托 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量液體,氣體和蒸汽的儀表。包括輸出脈沖信號的轉換器和輸出4~20mA模擬信號的變送器,并按轉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構如(圖1)        分離型渦街流量傳感器其結構如(圖2)

Vortex美國Aalborg渦街流量計/渦輪流量計

渦街流量計的基本原理是卡門渦街現(xiàn)象,當流體環(huán)繞通過一個非流線型的柱體時將產生漩渦,漩渦在柱體的兩側交替產生。因此產生了一個周期性的壓力脈沖,產生漩渦的頻率與流量的大小成線性比例關系。Aalborg公司的獨特的雙信號處理技術單獨測量柱體兩側的漩渦,同時過濾干擾信號。因此在全量程范圍內具有較高的測量精確度和抗干擾能力。

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

 

性能特性:

型號:VX
測量范圍 :0-100000(m3/h)精度    :0.5%讀數(shù)重復性 :0.25%讀數(shù)
工作溫度:-73-232(℃)
工作壓力:10(MPa)響應時間:0.5 S阻尼    :1…10 S 可調整速度范圍:液體  0.4…9.15 m/s 蒸汽和氣體  認證    :FM及CSA 1 Div 2 Groups B,C,D.
物理特性結構材質漩渦發(fā)生體:304 SS 或 316 SS電極      :304 SS 或 316 SS 封裝陶瓷測量管    :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 法蘭連接標準 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 字符顯示同時顯示順時流量和累積流量功能    :零點,滿量程,上限切除,下限切除,響應時間,采集時間工程單位,累積器,數(shù)據(jù)記錄,RS232  輸出信號:4…20 mA 阻抗小于600 Ω          5 V TTL脈沖輸出防護等級:NEMA 4X防爆認證: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

 

智能渦街流量計

 

 

 

LT-LUB智能渦街流量計原理  在流體中設置三角柱型旋渦發(fā)生體,則從旋渦發(fā)生體兩側交替地產生有規(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)生體下游非對稱地排列。 設旋渦的發(fā)生頻率為f,被測介質平均流速為 ,旋渦發(fā)生體迎流面寬度為d,表體通徑為D,即可得到以下關系式:  f=SrU1/d=SrU/md                    。1) 式中  U1--旋渦發(fā)生體兩側平均流速,m/s; Sr--斯特勞哈爾數(shù); m--旋渦發(fā)生體兩側弓形面積與管道橫截面面積之比   管道內體積流量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外,還與斯特勞哈爾數(shù)有關。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,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)的關系圖。由圖可見,在ReD=2×104~7×106范圍內,Sr可視為常數(shù),這是儀表正常工作范圍。當測量氣體流量時,VSF的流量計算式為  (4) 圖2 斯特勞哈爾數(shù)與雷諾數(shù)關系曲線  式中 qVn,qV--分別為標準狀態(tài)下(0oC或20oC,101.325kPa)和工況下的體積流量,m3/h;  LT,P--分別為標準狀態(tài)下和工況下的絕對壓力,Pa; Tn,T--分別為標準狀態(tài)下和工況下的熱力學溫度,K; LT,Z--分別為標準狀態(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)范圍內僅與旋渦發(fā)生體及管道的形狀尺寸等有關。但是作為流量計在物料平衡及能源計量中需檢測質量流量,這時流量計的輸出信號應同時監(jiān)測體積流量和流體密度,流體物性和組分對流量計量還是有直接影響的。  渦街流量計便是依據(jù)卡門旋渦原理進行封閉管道流體流量測量的新型流量計。因其具有良好的介質適應能力,無需溫度壓力補償即可直接測量蒸汽、空氣、氣體、水、液體的工況體積流量,配備溫度、壓力傳感器可測量標況體積流量和質量流量,是節(jié)流式流量計的理想替代產品。 為提高渦街流量計的耐高溫及抗振動性能,我公司新近開發(fā)出了SDLU改進型渦街流量傳感器,因其獨特的結構和選材使該傳感器可在高溫(350℃)、強振動(≤1g)的惡劣工況下使用。 在實際應用中,往往最大流量遠低于儀表的上限值,隨著負荷的變化,最小流量又往往會低于儀表的下限值,儀表并非工作在它的最佳工作段,為了解決這一問題,通常采用在測量處縮徑提高測量處的流速,并選用較小口徑的儀表以利于儀表的測量,但是這種變徑方式必須在變徑管與儀表間有長度為15D以上的直管段進行整流,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,其結構尺寸小,僅為工藝管內徑的1/3,與渦街流量計作成一體,不僅不需要另外附加一段直管段,還可以降低對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采用微功耗高新技術,采用鋰電池供電可不間斷運行一年以上,節(jié)省了電纜和顯示儀表的采購安裝費用,可就地顯示瞬時流量、累積流量等。溫度補償一體型渦街流量計還帶有溫度傳感器,可以直接測量出飽和蒸汽的溫度并計算出壓力,從而顯示飽和蒸汽的質量流量。溫壓補償一體型帶有溫度、壓力傳感器,用于氣體流量測量可直接測量出氣體介質的溫度和壓力,從而顯示氣體的標況體積流量。 ◆測量介質: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 ◆流量測量范圍正常測量流速范圍?雷諾數(shù)1.5×104~4×106;氣體5~50m/s;液體0.5~7m/s 正常測量流量范圍液體、氣體流量測量范圍見表2;蒸氣流量范圍見表3 ◆測量精度1.0級? 1.5級 ◆被測介質溫度:常溫–25℃~100℃ ◆高溫–25℃~150℃ -25℃~250℃ ◆輸出信號脈沖電壓輸出信號高電平8~10V 低電平0.7~1.3V ◆脈沖占空比約50%,傳輸距離為100m ◆脈沖電流遠傳信號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℃ ◆材質不銹鋼, 鋁合金 ◆電源DC24V或鋰電池3.6V ◆防爆等級本安型iaIIbT3-T6 防護等級IP65 智能渦街流量計產品選型

代號

通徑

流量范圍㎡/h

LT-LUB-25

DN25

1~10(液體)

25~60(氣體)

蒸汽流量請查看說明書,DN300以上推薦使用插入式渦街流量計

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

功能1

N

無溫壓補償

Y

有溫壓補償

 

代號

輸出型號

F1

4-20mA輸出(二線制)

F2

4-20mA輸出(三線制)

F3

RS485通訊接口

 

代號

被測介質

J1

液體

J2

氣體

J3

蒸汽

 

代號

連接方式

L1

法蘭卡裝式

L2

法蘭連接式

 

代號

功能2

E1

1.0級

E2

1.5級

T1

常溫

T2

高溫

T3

蒸汽

P1

1.6MPa

P2

2.5MPa

P3

4.0MPa

D1

內部3.6V供電

D2

DC24V供電

B1

不銹鋼

B2

碳鋼

渦街流量計的優(yōu)點 LT-LUB-智能渦街流量計的最大優(yōu)點是抗振性能特別好,無零點漂移,可靠性高。     通過長時間對渦街流量計進行的大量波形分析和頻譜分析,富沃得設計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,采用先進的數(shù)控車床進行加工,確保加工的同軸度和光潔度等技術參數(shù),配合特殊的工藝處理,從而最大限度的克服渦街流量計存在的固有自振蕩頻率對信號的影響這個通病。這是富沃得公司在制作渦街流量計方面的技術獨特優(yōu)勢,使得富沃得公司出廠的渦街流量計具有量好的抗振動能力。     ②FFM63系列智能渦街流量計的傳感器的通用性很強,從而使傳感器具有良好的互換性采用先進數(shù)控設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,從而真正做到不會因零部件的更換而影響傳感器的重復性和精度;能產生強大而穩(wěn)定的渦街信號。     ③結構簡單牢固,無可動部件,可靠性高,使用維護方便。      ④檢測元件不與介質接觸,性能穩(wěn)定,使用壽命長     傳感器采用檢測探頭與旋渦發(fā)生體分開安裝,而且耐高溫的壓電晶體密封在檢測探頭內,不與被測介質接觸,所以FFM63系列渦街流量計具有結構簡單、通用性好和穩(wěn)定性高的特點。     ⑤輸出與流量成正比的脈沖信號或模擬信號,無零點漂移,精度高,方便與計算機聯(lián)網(wǎng)     ⑥測量范圍寬,量程比可達1:10     ⑦渦街流量計測量體積流量時不需補償,渦街輸出的信號實際上是與流速成線性關系的,也就是與體積流量成正比。壓力和溫度補償?shù)哪康氖菫榱说玫搅黧w的密度,乘以體積流量就得到質量流量,若測量氣體的體積流量就不需要補償了。     ⑧壓力損失小。     用口徑DN50的渦街流量計測量可燃氣體的流量,若管道內的最大流量Qmax =200m3/h時,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,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。     ⑩應用范圍廣,蒸汽、氣體、液體流量均可測量。 渦街流量計的技術參數(shù) ●測量流體:飽和蒸汽、過熱蒸汽、氣體、液體(避免多相流) ●測量準確度及重復性:

測量流體

準確度

重復性

氣體(含蒸汽)

1.0級

0.33%

液體

1.5級

0.5%

●測量范圍

測量流體

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) ●結構類型:一體型渦街流量計 ●結構材質

部件名稱

材質

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: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 ●防護等級: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) ●相對濕度:5%~95℃  渦街流量計的安裝要求 渦街流量計有許多種結構形式,安裝、維修人員需要了解所裝儀表的具體結構、特點以及流量信號的轉換,了解信號傳輸過程中的各個環(huán)節(jié),按產品說明書進行安裝,以確保流量計的精確測量。

該公司產品分類: 巡檢儀 威力巴流量計 溫壓補償型渦街流量計 分體式電磁流量計 插入式電磁流量計 德爾塔巴流量計 皮托管流量計 彩屏無紙記錄儀 藍屏無紙記錄儀 基本型無紙記錄儀 無紙記錄儀 記錄儀表 磁性浮子液位計 浮球開關 磁翻板液位計 浮球液位計 金屬管轉子流量計 智能手操器 流量積算儀 閃光報警器

LUGBS系列管道式渦街流量計,內蒙管道式渦街流量計

 

² LUGBS簡介

 LUGB系列管道式渦街流量計是由設計在流場中的旋渦發(fā)生體、檢測探頭及相應的電子線路等組成。當流體流經旋渦發(fā)生體時,它的兩側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壓力,該壓力作用在檢測探頭上,便形成了一系列的交變電信號,經前置放大器轉換、整形、放大處理后,輸出與旋渦同步成正比的脈沖頻率信號(或標準信號)。

² LUGBS產品特點

1) 無可動部件,長期穩(wěn)定,結構簡單便于安裝和維護

2) 傳感器輸出為脈沖頻率,其頻率與被測流體的實際流量呈線性,零點無漂移,性能十分穩(wěn)定,結構形式多樣,有管道式、插入式流量傳感器形式

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

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

5) 壓損。s為孔板流量計的1/4~1/2),屬于節(jié)能流量儀表

6) 安裝方式靈活,根據(jù)現(xiàn)場工藝管道不通,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傳感頭,具有一定抗環(huán)境振動性能

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

9) 由軟件對儀表系數(shù)非線性進行修正,提高測量精度

10) 采用EPROM對累積流量進行掉電保護,保護時間大于10年

² LUGBS產品分類

儀表型號

LUGBS-N

LUGBS-A

LUGBS-B

LUGBS-C

LUGBS-D

信號輸出

脈沖

4-20mA

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

液體:1.0級 氣體或蒸汽:1.5~1.0級

液體:1.0級 氣體或蒸汽:1.5~1.0級

液體:1.0級 氣體或蒸汽:1.5~1.0級

測量范圍

標準量程

標準量程或擴展量程

標準量程或擴展量程

顯示器

溫壓補償

通訊接口

RS485

實時記錄

儀表材質

304或316L不銹鋼

304或316L不銹鋼

304或316L不銹鋼

防爆等級

ExdIIBT6或ExiaIICT4

ExdIIBT6或ExiaIICT4

ExdIIBT6或ExiaIICT4

防護等級

IP65

IP65

IP65

整機功耗

< 1W

< 1W

< 1W

儀表通經

DN15~DN300

DN15~DN300

DN15~DN300

安裝方式

法蘭安裝

法蘭安裝

法蘭安裝

介質溫度

-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測量范圍及工作壓力

儀表口徑 (mm)

液體測量范圍 (m3/h)

氣體測量范圍 (m3/h) 

連接方式

耐壓等級 (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型旋渦流量計是利用液體振動原理而開發(fā)的一種新型流量計,廣泛應用在石油、化工、冶金、造紙等行業(yè)流體的計量,該流量計無可動部件,性強、精度高、壽命長,可在很寬的流量范圍內精確測量液體的瞬時流量和累計流量。其不受介質溫度、壓力、粘度及組分的影響,同時不堵、不卡、不易結垢、耐高溫、高壓,安全防爆,適用于惡劣環(huán)境。流量計分一體化顯示和遠傳顯示,并可輸出脈沖信號或電流信號與微機聯(lián)網(wǎng)。  

  二、主要特點
 
當流體以一定流速流經設置在流場中的旋渦發(fā)生體時,在柱體的下游產生一對交替出現(xiàn)的而且排列整齊的渦列(渦街),先在柱體的一側產生,繼而在柱體的另一側產生。這一產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系式,其中系數(shù)被命名為斯特羅哈爾數(shù)。
  三、技術參數(shù)
序號
項目
主要性能指標
1
公稱通徑DN(mm)
DN10-DN300
2
流量范圍(m3/h)
0.2-1600
3
度等級
1級;(經非線性修正可達0.5級)
4
量程化
10:1
5
重復性
<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、遠傳顯示100m
11
輸出信號

①1脈沖  ②2模擬4-20mA???????? ③3RS485接口

12
供電方式

內裝電池:3V  DC 外接電源:(6~24)V DC(無原則信號外輸時)

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
液體
15
防爆等級
Ex dⅡBT4
16
執(zhí)行標準

企業(yè)標準:JB/T 9249-1999檢定規(guī)程:JJG  198-1994《速度式流量計檢定規(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
   

江蘇金華自動化儀表設備廠(江蘇金華儀表線纜有限公司)專業(yè)生產各種熱電偶、熱電阻、雙金屬溫度計、壓力表、壓力變送器、電磁流量計、渦街流量計、V錐流量計、孔板、超聲波流量計、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  商務咨詢電話:0517-86982766 0517-86998766   傳真:0517-86980766   QQ:1194478361

SDLUGB供應渦街流量計,管道式渦街流量計,蒸汽流量計,渦街流量計廠家,渦街流量計價格

渦街流量計也稱之為旋渦流量計或卡門渦街流量計。綜合吸收發(fā)達國家先進技術和總結多年研究生產經驗的基礎上進行精心設計的產品,實現(xiàn)了產品智能化、標準化、系列化、通用化、生產模具化、確保產品質量的美觀性。該產品具有電路先進、功耗微低、量程比寬、結構簡單、阻力損失小、堅固耐用、用途廣、使用壽命長、工作穩(wěn)定、便于安裝調試等特點。
2技術指標編輯
◆測量介質: 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
◆流量測量范圍 正常測量流速范圍 雷諾數(shù)1.5×104~4×106;氣體5~50m/s; 液體0.5~7m/s
正常測量流量范圍 液體、氣體流量測量范圍見表2; 蒸氣流量范圍見表3
◆測量精度 1.0級 1.5級
◆被測介質溫度:常溫–25℃~100℃,高溫–25℃~150℃ -25℃~250℃
◆輸出信號 脈沖電壓輸出信號 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
◆脈沖電流遠傳信號 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 不銹鋼, 鋁合金
◆電源 DC24V或鋰電池3.6V
◆防爆等級 本安型iaIIbT3-T6,防護等級 IP65
3原理編輯
在流體中設置三角柱型旋渦發(fā)生體,則從旋渦發(fā)生體兩側交替地產生有規(guī)則的旋渦,這種旋渦稱為卡門旋渦,旋渦列在旋渦發(fā)生體下游非對稱地排列。
渦街流量計是根據(jù)卡門渦街原理(Kármán Vortex Street)測量氣體、蒸汽或液體的體積流量、標況的體積流量或質量流量的體積流量計。并可作為流量變送器應用于自動化控制系統(tǒng)中。
渦街流量計是應用流體振蕩原理來測量流量的,流體在管道中經過渦街流量變送器時,在三角柱的旋渦發(fā)生體后上下交替產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,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),
當雷諾數(shù)Re在
范圍內,St值約為0.2。在測量中,要盡量滿足流體的雷諾數(shù)在
,此時旋渦頻率
由此,通過測量旋渦頻率就可以計算出流過旋渦發(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
渦街流量計是應用卡門渦街原理和現(xiàn)代電子技術設計而制造的一種流量計,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))
流體旋渦對三角柱產生交替變化的壓力,由壓電信號傳感器檢測成電信號經前置放大器進行放大,
變成標準電信號輸出。
VA型系列渦街流量計可以對廣泛的氣體(包括蒸汽)和液體進行容積計量,配接流量積算儀和溫度、壓力傳感器可進行質量運算及各種參數(shù)顯示。
5特點編輯
一、結構簡單而牢固,無可動部件,可靠性高,長期運行十分可靠。
二、安裝簡單,維護十分方便。
三、檢測傳感器不直接接觸被測介質,性能穩(wěn)定,壽命長。
四、輸出是與流量成正比的脈沖信號,無零點漂移,精度高。
五、測量范圍寬,量程比可達1:10。
六、壓力損失較小,運行費用低,更具節(jié)能意義。
在一定的雷諾數(shù)范圍內,輸出信號頻率不受流體物理性質和組份變化的響,儀表系數(shù)僅與旋渦發(fā)生體的形狀和尺寸有關,測量流體體積流量時無需補償,調換配件后一般無需重新標定儀表系數(shù)。
應用范圍廣,蒸汽、氣體、液體的流量均可測量。
檢定周期為二年。
LUGB型渦街流量傳感器應用內徑范圍為25-300mm(滿管式),KTLUI型插入式渦街流量傳感器應用內徑范圍為350-1200mm(插入式),滿管式測量液體精度為1%,測量蒸汽和氣體精度為1.5%,插入式測量液體精度為2%,測量蒸汽和氣體精度為2.5%,被測介質溫度為-20~150℃、-40~250℃、+100~350℃(僅管式),輸出信號為三線制電壓脈沖,三線制4-20mA、二線制4-20mA。
該公司產品分類: 校驗儀表 儀表配件 熱電阻 熱電偶 流速型流量計 節(jié)流裝置 非接觸式液位計 接觸式液位計 電容式壓力變送器 擴散貴壓力變送器 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

產品介紹:
一、主要特點:

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

■ 產品特點
A.壓力損失小,量程范圍寬,范圍度達10~40。B.無可動部件,性能穩(wěn)定,結構簡單便于安裝和維護。C.采用消擾電路和抗振傳感頭,使儀表具有一定抗環(huán)境振動性能。D.可測介質溫度達+350℃(+450℃)。
 
■ 主要技術參數(shù)

公稱口徑

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

適用介質

氣體  液體  蒸汽 

可測介質溫度

-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

1.5級

測量范圍

見表4、表5、表6

輸出信號

電壓脈沖:低電平≤1V,高電平≥2.5V,負載電阻≥100KΩ

4~20mA轉換精度±0.5%滿度值,負載電阻<300Ω(24VDC)

現(xiàn)場液晶顯示:瞬時流量6位顯示(m3/h或kg/h,t/h),轉換精度±0.1%;累積流量8位顯示,(m3,kg,t),轉換精度±0.1%

供電電源

電壓脈沖輸出時:+12VDC或+24VDC

4~20mA輸出時:+19VDC~+30VDC

現(xiàn)場液晶顯示:電池供電3.6V,1節(jié)1號鋰電池,使用壽命大于3年,外部供電+12VDC或+24VDC可實現(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)場液晶顯示:-25℃~+55℃

防爆標志 

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:體積流量或質量流量

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

二、DYP2000系列型譜

DYL

 

流量儀表

 

U

 

渦街

 

G

 

流量計

S

 

智能流量變送器(4~20mA輸出)

 

B

 

應力式敏感元件

 

-2

 

法蘭卡裝連接

 

2

 

液體介質

3

 

氣體介質

4

 

蒸汽介質

 

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)

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