3151/3051頂裝式液位變送器大罐體安裝需要DN80的還是DN50? |
信息來源: 液位變送器廠家 | 2020-10-10 點(diǎn)擊量: 6209 |

頂裝的3151/3051頂裝式液位變送器必須要在安裝時(shí)保持垂直,連桿也不能彎曲。許多情況還要加裝阻波管,以隔離罐內(nèi)液體的晃動(dòng)對(duì)浮子產(chǎn)生影響和損壞,3151/3051頂裝式液位變送器一般都是在地下槽罐、或工作臺(tái)位于槽罐頂部的測(cè)量現(xiàn)場(chǎng),因?yàn)楦∽右滦械饺萜鲀?nèi),所以安裝法蘭一般不得小于DN80,否則浮子直徑過大無法通過法蘭孔進(jìn)入容器內(nèi)。很多客戶在選擇3151/3051頂裝式液位變送器的時(shí)候,并不在意法蘭的大小,這容易在以后的使用與維護(hù)中產(chǎn)生問題,而我們頂裝式的正常標(biāo)準(zhǔn)時(shí)法蘭為DN80,這樣現(xiàn)場(chǎng)的配對(duì)法蘭買一只DN80的正好與其匹配,并且3151/3051頂裝式液位變送器的浮筒和導(dǎo)桿都可以插入通過,順利安裝。如果客戶有特殊要求,需要小號(hào)法蘭,就是現(xiàn)在我們定做的法蘭DN50的大小。
Thetopmounted3151/3051topmountedliquidleveltransmittermustbeverticalduringinstallation,andtheconnectingrodcannotbebent.Inmanycases,awavestoptubeshouldbeinstalledtoisolatetheliquidsloshinginthetankfromaffectinganddamagingthefloat.The3151/3051topmountedliquidleveltransmitterisgenerallylocatedintheundergroundtankorthemeasuringsitewheretheworkingtableislocatedonthetopofthetank.Becausethefloaterneedstogodownintothecontainer,theinstallationflangeshouldnotbelessthanDN80,otherwisethefloatdiameteristoolargetoenterthecontainerthroughtheflangehole。Manycustomersdon'tcareaboutthesizeofflangewhenchoosing3151/3051topmountedliquidleveltransmitter,whichiseasytocauseproblemsinfutureuseandmaintenance.However,ournormalstandardfortopmountedliquidleveltransmitterisDN80.Inthisway,aDN80matchingflangeispurchasedonsite,andthebuoyandguiderodof3151/3051topmountedliquidleveltransmittercanbeinsertedthrough,Theinstallationissmooth.Ifcustomershavespecialrequirementsandneedsmallflange,itisthesizeofflangeDN50thatweordernow.
1、防腐性公稱壓力≤1.0MPa,安裝連接法蘭,液位計(jì)出廠的常用突面尺寸參考規(guī)范制造。
1.Corrosionresistance,nominalpressure≤1.0MPa,installationofconnectingflange,commonprotrudingsurfacedimensionsofliquidlevelgaugefactoryrefertothespecificationmanufacturing.
2、3151/3051頂裝式液位變送器有一定盲區(qū),故在讀取液位高度時(shí)應(yīng)加上盲區(qū)值補(bǔ)償,生產(chǎn)廠家在液位計(jì)出廠時(shí),標(biāo)尺刻度零位已遷移到實(shí)際值。液位計(jì)測(cè)量范圍不超過5米,否則影響液位計(jì)的穩(wěn)定可靠、牢度等。
2.3151/3051topmountedliquidleveltransmitterhasacertainblindarea,sotheblindzonevaluecompensationshouldbeaddedwhenreadingtheliquidlevelheight.Whenthemanufacturerleavesthefactory,thezeropositionofthescalescalehasbeenmovedtotheactualvalue.Themeasuringrangeoftheliquidlevelgaugeshallnotexceed5meters,otherwisethestability,reliabilityandfastnessofthelevelgaugewillbeaffected.
3、3151/3051頂裝式液位變送器與罐體的連接部分一般是選用DN80或者DN100標(biāo)準(zhǔn)型的法蘭連接,如果用戶覺得牢固性不夠的話,可以根據(jù)實(shí)際情況選配更大規(guī)格的法蘭連接。一般情況下是可以的。
3.Theconnectionpartof3151/3051topmountedliquidleveltransmitterandtankbodyisgenerallyconnectedwithDN80orDN100standardflange.Iftheuserthinksthattheconnectionisnotfirmenough,alargerflangeconnectioncanbeselectedaccordingtotheactualsituation.Ingeneral,itisOK.
4、3151/3051頂裝式液位變送器在安裝高度較高達(dá)到4米以上的話,建議一定要在兩邊加固定拉索,固定位置不偏移,可以保證儀表在惡劣測(cè)量環(huán)境中,比如現(xiàn)場(chǎng)震動(dòng)大或遭到碰撞,大風(fēng)天氣等,遭遇碰撞不會(huì)受到損壞。
4.Whentheinstallationheightof3151/3051topmountedliquidleveltransmitterismorethan4meters,itisrecommendedtoaddfixedcablesonbothsides,andthefixedpositionshallnotbeoffset,soastoensurethattheinstrumentwillnotbedamagedinseveremeasurementenvironment,suchasstrongvibrationorcollisiononsite,windyweather,etc.
5、在遇到較高罐體測(cè)量時(shí)如10米以上,3151/3051頂裝式液位變送器不管是分段,建議在中間部位或者每個(gè)分段的法蘭周圍用卡箍或其他固定件固定。在裝置時(shí),一定要堅(jiān)持筆直狀況,3151/3051頂裝式液位變送器與容器引管間應(yīng)加裝有球閥,以便液位計(jì)的維修和拆開清洗
5.Incaseofhightankmeasurement,suchasmorethan10meters,itisrecommendedtofix3151/3051topmountedliquidleveltransmitterwithclampsorotherfixedpartsatthemiddlepartoraroundtheflangeofeachsection,nomatteritissegmented.Wheninstallingthedevice,itisnecessarytoadheretothestraightcondition.Aballvalveshouldbeinstalledbetween3151/3051topmountedliquidleveltransmitterandthevesselleadpipe,soastofacilitatethemaintenanceanddisassemblyofthelevelgaugeforcleaning
頂裝的3151/3051頂裝式液位變送器使用時(shí)需要對(duì)指示器的磁翻板用所附磁鋼進(jìn)行一次引導(dǎo),從而使3151/3051頂裝式液位變送器零位以上指示白色、零位以下指示紅色,通過無觸點(diǎn)報(bào)警開關(guān)使轉(zhuǎn)換起觸點(diǎn)按液位給定值動(dòng)作從而達(dá)到液位控制的目的報(bào)警開關(guān)安裝在液位計(jì)所需控制位置,轉(zhuǎn)換器安裝在控制室內(nèi)。它是利用磁藕合原理來進(jìn)行工作的。
Whenthetopmounted3151/3051topmountedliquidleveltransmitterisused,themagneticflapoftheindicatorneedstobeguidedbythemagneticsteelattached,sothatthe3151/3051topmountedliquidleveltransmitterindicateswhiteabovethezeropositionandredbelowthezeroposition.Throughthecontactlessalarmswitch,theswitchingstartingpointactsaccordingtothegivenvalueoftheliquidlevel,soastoachievethepurposeofliquidlevelcontrol.ThealarmswitchisinstalledintheliquidlevelmeterstationTocontroltheposition,theconverterisinstalledinthecontrolroom.Itworksontheprincipleofmagneticcoupling.
不過這里現(xiàn)場(chǎng)需要注意的是,如果選擇DN50的法蘭,罐體頂部開孔尺寸必須在78-80之間,配對(duì)接法蘭與頂部焊接之間的鋼管內(nèi)徑也是78-80mm,而配對(duì)法蘭DN50的中心孔開內(nèi)徑也是78-80,這三個(gè)直徑要保持一致。就是DN50的法蘭,中間孔直徑為加工變大,所以浮筒插入不了,就影響了法蘭對(duì)接。
However,itshouldbenotedthatiftheDN50flangeisselected,theopeningsizeatthetopofthetankmustbebetween78-80,theinnerdiameterofthesteelpipebetweenthematingflangeandthetopweldingisalso78-80mm,andtheopeningdiameterofthecenterholeofthematchingflangeDN50isalso78-80,andthethreediametersshouldbeconsistent.ItistheflangeofDN50.Thediameterofthemiddleholebecomeslargerforprocessing,sothepontooncannotbeinserted,whichaffectstheflangebuttjoint.
當(dāng)然,如果按照標(biāo)準(zhǔn)DN80的選擇去做3151/3051頂裝式液位變送器,那么現(xiàn)場(chǎng)安裝的時(shí)候,配對(duì)法蘭直接買一只DN80法蘭片即可,不需要在中心孔開大孔,DN80的中心孔直徑足夠浮筒和導(dǎo)桿插入。
Ofcourse,ifthe3151/3051topmountedliquidleveltransmitterisselectedaccordingtothestandardDN80,thenduringthefieldinstallation,aDN80flangecanbedirectlypurchasedfromthecompanionflange,andthereisnoneedtoopenalargeholeinthecentralhole.ThediameterofthecentralholeofDN80isenoughfortheinsertionofbuoyandguiderod.
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