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當前位置:首頁技術文章天驥分享(xiang)法國KIMO差壓(ya)變送器安裝方法

天驥分享法國KIMO差壓變送器安裝方法

更新時間:2023-06-20點擊次數:710

天(tian)驥分享法國KIMO差(cha)壓變送器安裝方法

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1、基(ji)本技術(shu)要求:(1)取(qu)壓(ya)(ya)點處(chu)應保(bao)證有直管(guan)(guan)段,兩邊各大于(yu)5D(管(guan)(guan)道通經(jing));(2)在蒸汽管(guan)(guan)道上取(qu)壓(ya)(ya)時(shi),應在管(guan)(guan)道的(de)(de)側面安裝引壓(ya)(ya)管(guan)(guan);(3)平衡(heng)罐應安裝在引壓(ya)(ya)管(guan)(guan)的(de)(de)最(zui)高點處(chu);(4)排污(wu)管(guan)(guan)應在靠近變(bian)(bian)送器引壓(ya)(ya)管(guan)(guan)連接處(chu)安裝;(5)取(qu)壓(ya)(ya)點與變(bian)(bian)送器的(de)(de)管(guan)(guan)道距離應大于(yu)1米;(6)變(bian)(bian)送器的(de)(de)安裝位置應低于(yu)取(qu)壓(ya)(ya)點的(de)(de)位置。

2、汽(qi)(qi)包(bao)水(shui)(shui)位(wei)(wei)(wei)(wei)的(de)(de)(de)(de)(de)(de)(de)(de)安裝(zhuang)(zhuang):汽(qi)(qi)包(bao)水(shui)(shui)位(wei)(wei)(wei)(wei)測(ce)(ce)量(liang)系(xi)統的(de)(de)(de)(de)(de)(de)(de)(de)安裝(zhuang)(zhuang)除滿足國(guo)家和行(xing)業有關(guan)標準外,還應(ying)(ying)在如(ru)(ru)(ru)下的(de)(de)(de)(de)(de)(de)(de)(de)安裝(zhuang)(zhuang)中,根(gen)據汽(qi)(qi)包(bao)水(shui)(shui)位(wei)(wei)(wei)(wei)計測(ce)(ce)量(liang)的(de)(de)(de)(de)(de)(de)(de)(de)特(te)性(xing)(xing),加(jia)以(yi)注意(yi),以(yi)保(bao)證水(shui)(shui)位(wei)(wei)(wei)(wei)測(ce)(ce)量(liang)儀表(biao)可(ke)(ke)靠正確(que)運(yun)行(xing)。(1)?取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)孔獨(du)立(li)性(xing)(xing)原則:?每個水(shui)(shui)位(wei)(wei)(wei)(wei)測(ce)(ce)量(liang)裝(zhuang)(zhuang)置都應(ying)(ying)具有獨(du)立(li)的(de)(de)(de)(de)(de)(de)(de)(de)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)孔。不(bu)(bu)(bu)得在同一(yi)(yi)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)孔上(shang)(shang)并(bing)(bing)(bing)聯(lian)(lian)多個水(shui)(shui)位(wei)(wei)(wei)(wei)測(ce)(ce)量(liang)裝(zhuang)(zhuang)置,以(yi)避(bi)免相互(hu)影響(xiang),降低水(shui)(shui)位(wei)(wei)(wei)(wei)測(ce)(ce)量(liang)的(de)(de)(de)(de)(de)(de)(de)(de)可(ke)(ke)靠性(xing)(xing)。如(ru)(ru)(ru)果(guo)在同一(yi)(yi)個取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)孔上(shang)(shang)并(bing)(bing)(bing)聯(lian)(lian)2個或(huo)(huo)更多的(de)(de)(de)(de)(de)(de)(de)(de)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)管(guan)(guan),其中一(yi)(yi)個平衡門、一(yi)(yi)次門或(huo)(huo)排污門泄漏,或(huo)(huo)檢修時(shi)操作不(bu)(bu)(bu)當(dang),極易影響(xiang)并(bing)(bing)(bing)聯(lian)(lian)的(de)(de)(de)(de)(de)(de)(de)(de)其它水(shui)(shui)位(wei)(wei)(wei)(wei)計的(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)量(liang),帶來很大(da)的(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)量(liang)誤(wu)差(cha),造成(cheng)誤(wu)判。若(ruo)(ruo)正巧是三(san)冗余邏輯中的(de)(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)對(dui),易引發控制失靈、保(bao)護誤(wu)動(dong)或(huo)(huo)拒(ju)動(dong),存在著很大(da)的(de)(de)(de)(de)(de)(de)(de)(de)事故隱(yin)患(huan)。當(dang)水(shui)(shui)位(wei)(wei)(wei)(wei)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)點(dian)不(bu)(bu)(bu)夠時(shi)也不(bu)(bu)(bu)宜采(cai)用(yong)(yong)加(jia)連通(tong)管(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)方法增(zeng)加(jia)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)點(dian)。采(cai)用(yong)(yong)這種方法的(de)(de)(de)(de)(de)(de)(de)(de)實踐證明(ming),當(dang)一(yi)(yi)臺(tai)差(cha)壓(ya)水(shui)(shui)位(wei)(wei)(wei)(wei)計排污時(shi),對(dui)其它差(cha)壓(ya)水(shui)(shui)位(wei)(wei)(wei)(wei)表(biao)計影響(xiang)較大(da)。更不(bu)(bu)(bu)宜在聯(lian)(lian)通(tong)管(guan)(guan)式(shi)水(shui)(shui)位(wei)(wei)(wei)(wei)計的(de)(de)(de)(de)(de)(de)(de)(de)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)管(guan)(guan)上(shang)(shang)并(bing)(bing)(bing)聯(lian)(lian)差(cha)壓(ya)水(shui)(shui)位(wei)(wei)(wei)(wei)計,這不(bu)(bu)(bu)僅因為排污時(shi)相互(hu)影響(xiang),而且(qie)還會附加(jia)不(bu)(bu)(bu)確(que)定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)誤(wu)差(cha)。當(dang)汽(qi)(qi)包(bao)上(shang)(shang)水(shui)(shui)位(wei)(wei)(wei)(wei)測(ce)(ce)量(liang)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)孔不(bu)(bu)(bu)夠時(shi),可(ke)(ke)采(cai)用(yong)(yong)4.5節介紹的(de)(de)(de)(de)(de)(de)(de)(de)"多測(ce)(ce)孔接管(guan)(guan)技術",在汽(qi)(qi)包(bao)上(shang)(shang)已提(ti)供的(de)(de)(de)(de)(de)(de)(de)(de)大(da)口(kou)徑取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)管(guan)(guan)中插入1~2個取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)管(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)技術增(zeng)多取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)點(dian)。當(dang)采(cai)用(yong)(yong)此方法時(shi),應(ying)(ying)采(cai)取(qu)(qu)(qu)(qu)(qu)適當(dang)措施防止各個取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)系(xi)統互(hu)相干擾。(2)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)孔位(wei)(wei)(wei)(wei)置:?取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)孔位(wei)(wei)(wei)(wei)置應(ying)(ying)盡量(liang)避(bi)開(kai)汽(qi)(qi)包(bao)內(nei)水(shui)(shui)、汽(qi)(qi)工況(kuang)不(bu)(bu)(bu)穩定(ding)區(qu)(如(ru)(ru)(ru)安全閥排氣(qi)口(kou)、汽(qi)(qi)包(bao)進水(shui)(shui)口(kou)、下降管(guan)(guan)口(kou)、汽(qi)(qi)水(shui)(shui)分離器水(shui)(shui)槽(cao)處等),若(ruo)(ruo)不(bu)(bu)(bu)能避(bi)開(kai)時(shi),應(ying)(ying)在汽(qi)(qi)包(bao)內(nei)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)口(kou)處加(jia)裝(zhuang)(zhuang)穩流(liu)裝(zhuang)(zhuang)置。應(ying)(ying)優先選用(yong)(yong)汽(qi)(qi)、水(shui)(shui)流(liu)穩定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)汽(qi)(qi)包(bao)端頭(tou)的(de)(de)(de)(de)(de)(de)(de)(de)測(ce)(ce)孔或(huo)(huo)將取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)口(kou)從(cong)汽(qi)(qi)包(bao)內(nei)部引至汽(qi)(qi)包(bao)端頭(tou)。實踐證明(ming),汽(qi)(qi)包(bao)端頭(tou)取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)不(bu)(bu)(bu)僅取(qu)(qu)(qu)(qu)(qu)樣(yang)(yang)(yang)(yang)穩定(ding),而且(qie)停爐后用(yong)(yong)汽(qi)(qi)包(bao)壁(bi)留(liu)下的(de)(de)(de)(de)(de)(de)(de)(de)水(shui)(shui)跡線核對(dui)也說(shuo)明(ming)與水(shui)(shui)位(wei)(wei)(wei)(wei)計零(ling)位(wei)(wei)(wei)(wei)偏差(cha)很小。

3、電(dian)(dian)容式(shi)差壓(ya)變(bian)送(song)器(qi)安(an)(an)裝(zhuang)(zhuang):?電(dian)(dian)容式(shi)差壓(ya)變(bian)送(song)器(qi)由(you)于其(qi)測量范(fan)圍很小,變(bian)送(song)器(qi)中傳(chuan)感(gan)元件(jian)的(de)自重即會影(ying)響到微差壓(ya)變(bian)送(song)器(qi)的(de)輸(shu)出(chu),因此在(zai)安(an)(an)裝(zhuang)(zhuang)電(dian)(dian)容式(shi)差壓(ya)變(bian)送(song)器(qi)出(chu)現的(de)零(ling)位變(bian)化情況(kuang)屬正常情況(kuang)。安(an)(an)裝(zhuang)(zhuang)時應(ying)使電(dian)(dian)容式(shi)變(bian)送(song)器(qi)的(de)壓(ya)力(li)敏(min)感(gan)件(jian)軸向垂直于重力(li)方向,如(ru)果安(an)(an)裝(zhuang)(zhuang)條件(jian)限制,則應(ying)在(zai)安(an)(an)裝(zhuang)(zhuang)固定后調(diao)整(zheng)變(bian)送(song)器(qi)零(ling)位到標準值而滿量程的(de)輸(shu)出(chu)信號(hao)不應(ying)由(you)任何調(diao)整(zheng) 。

壓力變送(song)器常見的故障

壓力傳感器、變送(song)器常見故障

1、壓力上去,變(bian)送器輸(shu)也上不去:此種(zhong)情況,先應檢(jian)查壓力接口是(shi)(shi)(shi)否漏氣(qi)或(huo)(huo)者被堵住,如果(guo)確認不是(shi)(shi)(shi),檢(jian)查接線方式,如接線無誤再檢(jian)查電源(yuan),如電源(yuan)正常再察看傳(chuan)(chuan)感(gan)器零位是(shi)(shi)(shi)否有(you)(you)輸(shu)出(chu),或(huo)(huo)者進行(xing)簡單加壓看輸(shu)出(chu)是(shi)(shi)(shi)否變(bian)化,有(you)(you)變(bian)化證明傳(chuan)(chuan)感(gan)器沒有(you)(you)損壞(huai),如果(guo)無變(bian)化傳(chuan)(chuan)感(gan)器即已經損壞(huai)。出(chu)現這(zhe)種(zhong)情況的其(qi)他(ta)原因還可(ke)能是(shi)(shi)(shi)儀(yi)表損壞(huai),或(huo)(huo)者整(zheng)個系統的其(qi)他(ta)環節的問題。

2、加(jia)壓(ya)(ya)(ya)(ya)(ya)(ya)變(bian)送(song)器(qi)(qi)輸出(chu)不(bu)(bu)變(bian)化(hua),再(zai)加(jia)壓(ya)(ya)(ya)(ya)(ya)(ya)變(bian)送(song)器(qi)(qi)輸出(chu)突然(ran)變(bian)化(hua),泄(xie)壓(ya)(ya)(ya)(ya)(ya)(ya)變(bian)送(song)器(qi)(qi)零(ling)位回不(bu)(bu)去(qu)。產生此(ci)現象(xiang)的原(yuan)因(yin)極有可(ke)能是(shi)(shi)(shi)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)傳(chuan)(chuan)感(gan)(gan)(gan)器(qi)(qi)密(mi)封(feng)(feng)圈(quan)(quan)引起的,在我(wo)們的客戶使(shi)用(yong)中碰到(dao)(dao)過幾次。一般是(shi)(shi)(shi)因(yin)為密(mi)封(feng)(feng)圈(quan)(quan)規格原(yuan)因(yin)(太(tai)軟或太(tai)厚),傳(chuan)(chuan)感(gan)(gan)(gan)器(qi)(qi)擰緊時(shi),密(mi)封(feng)(feng)圈(quan)(quan)被壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)到(dao)(dao)傳(chuan)(chuan)感(gan)(gan)(gan)器(qi)(qi)引壓(ya)(ya)(ya)(ya)(ya)(ya)口(kou)里面堵(du)塞傳(chuan)(chuan)感(gan)(gan)(gan)器(qi)(qi),加(jia)壓(ya)(ya)(ya)(ya)(ya)(ya)時(shi)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)介質(zhi)進不(bu)(bu)去(qu),但是(shi)(shi)(shi)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)是(shi)(shi)(shi)很大時(shi)突然(ran)沖開密(mi)封(feng)(feng)圈(quan)(quan),壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li) 傳(chuan)(chuan)感(gan)(gan)(gan)器(qi)(qi)受到(dao)(dao)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)而變(bian)化(hua),而壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)再(zai)次降低時(shi),密(mi)封(feng)(feng)圈(quan)(quan)又回位堵(du)住(zhu)引壓(ya)(ya)(ya)(ya)(ya)(ya)口(kou),殘存(cun)的壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)釋放不(bu)(bu)出(chu),因(yin)此(ci)傳(chuan)(chuan)感(gan)(gan)(gan)器(qi)(qi)零(ling)位又下不(bu)(bu)來。排除(chu)此(ci)原(yuan)因(yin)的最佳(jia)方法是(shi)(shi)(shi)將(jiang)傳(chuan)(chuan)感(gan)(gan)(gan)器(qi)(qi)卸下,直接察看(kan)零(ling)位是(shi)(shi)(shi)否正(zheng)常,如果正(zheng)常更(geng)換密(mi)封(feng)(feng)圈(quan)(quan)再(zai)試。

3、變(bian)送器(qi)輸(shu)出信號不穩

信號(hao)不穩的原(yuan)因有以下幾種(zhong)

A. 壓力(li)源本(ben)身(shen)(shen)是一個不穩定的壓力(li)B. 儀表或壓力(li)傳感(gan)器抗(kang)干擾能(neng)力(li)不強(qiang)C. 傳感(gan)器接線不牢D. 傳感(gan)器本(ben)身(shen)(shen)振動很(hen)厲害

E. 傳感器故障

4、變送器(qi)接電(dian)無輸出

可能的原因有:

A. 接錯線(儀(yi)表(biao)(biao)和傳感器都(dou)檢查)B. 導線本身的斷路或短路C. 電源無輸出或電源不(bu)匹配D. 儀(yi)表(biao)(biao)損壞或儀(yi)表(biao)(biao)不(bu)匹配

E. 傳感器損壞

5、變送器與指針式(shi)壓力表對照偏差大首先,出現(xian)偏差是正(zheng)(zheng)常的現(xian)象其次,確認(ren)正(zheng)(zheng)常的偏差范圍確認(ren)正(zheng)(zheng)常誤差范圍的方法:

計(ji)算出壓力表的誤(wu)(wu)差(cha)值例(li)如:壓力表量程為(wei) 30bar , 精(jing)度(du)(du) 1.5%,最小刻度(du)(du)為(wei)0.2bar正常的誤(wu)(wu)差(cha)為(wei):30bar*1.5%+0.2*0.5(視(shi)覺誤(wu)(wu)差(cha))=0.55 bar

6、壓力變送器的(de)誤(wu)差值。

例如:壓力(li)傳(chuan)感器(qi)量程(cheng)為(wei)20bar,精度0.5%,儀表(biao)精度為(wei)0.2%,正常(chang)的(de)(de)(de)誤(wu)差(cha)(cha)為(wei):20bar*0.5%+20bar*0.2%=0.18bar整體對照(zhao)時出現的(de)(de)(de)可能性誤(wu)差(cha)(cha)范(fan)圍應(ying)以(yi)大誤(wu)差(cha)(cha)值(zhi)的(de)(de)(de)設備的(de)(de)(de)誤(wu)差(cha)(cha)范(fan)圍為(wei)準,以(yi)上(shang)例來說(shuo),傳(chuan)感器(qi)與變送(song)器(qi)偏(pian)差(cha)(cha)值(zhi)在(zai)0.55bar 內可視為(wei)正常(chang)。

如果偏差非常大,應使用高精(jing)度儀表(biao)(至少此儀表(biao)高于壓力表(biao)和(he)傳感器)進行參照。

7、微差(cha)壓變送器安裝位置(zhi)對零位輸出的影(ying)響(xiang):

微差(cha)壓(ya)變(bian)送(song)(song)(song)(song)器(qi)由(you)于(yu)其測(ce)量范圍很小,變(bian)送(song)(song)(song)(song)器(qi)中傳感元(yuan)件的自重即會影(ying)響到(dao)(dao)微差(cha)壓(ya)變(bian)送(song)(song)(song)(song)器(qi)的輸(shu)出(chu),因此在(zai)安(an)裝微差(cha)壓(ya)變(bian)送(song)(song)(song)(song)器(qi)出(chu)現的零位(wei)變(bian)化情(qing)(qing)況(kuang)屬正常情(qing)(qing)況(kuang)。安(an)裝時應(ying)使變(bian)送(song)(song)(song)(song)器(qi)的壓(ya)力(li)敏感件軸向垂直于(yu)重力(li)方向,如果(guo)安(an)裝條件限制(zhi),則應(ying)安(an)裝固定后調整變(bian)送(song)(song)(song)(song)器(qi)零位(wei)到(dao)(dao)標準值