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(lái)源: 液位變送器廠(chǎng)家 | 2020-10-10 點(diǎn)擊量: 3540 |

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,以隔離罐內液體的晃動(dòng)對浮子產(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、或工作臺位于槽罐頂部的測量現場(chǎng),因為浮子要下行到容器內,所以安裝法蘭一般不得小于DN80,否則浮子直徑過(guò)大無(wú)法通過(guò)法蘭孔進(jìn)入容器內。很多客戶(hù)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中產(chǎn)生問(wèn)題,而我們頂裝式的正常標準時(shí)法蘭為DN80,這樣現場(chǎng)的配對法蘭買(mǎi)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桿都可以插入通過(guò),順利安裝。如果客戶(hù)有特殊要求,需要小號法蘭,就是現在我們定做的法蘭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(chēng)壓力≤1.0MPa,安裝連接法蘭,液位計出廠(chǎng)的常用突面尺寸參考規范制造。
1.Corrosionresistance,nominalpressure≤1.0MPa,installationofconnectingflange,commonprotrudingsurfacedimensionsofliquidlevelgaugefactoryrefertothespecificationmanufacturing.
2、3151/3051頂裝式液位變送器有一定盲區,故在讀取液位高度時(shí)應加上盲區值補償,生產(chǎn)廠(chǎng)家在液位計出廠(chǎng)時(shí),標尺刻度零位已遷移到實(shí)際值。液位計測量范圍不超過(guò)5米,否則影響液位計的穩定可靠、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標準型的法蘭連接,如果用戶(hù)覺(jué)得牢固性不夠的話(huà),可以根據實(shí)際情況選配更大規格的法蘭連接。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到4米以上的話(huà),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量環(huán)境中,比如現場(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?chē)每ü炕蚱渌潭潭?。在裝置時(shí),一定要堅持筆直狀況,3151/3051頂裝式液位變送器與容器引管間應加裝有球閥,以便液位計的維修和拆開(kāi)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)需要對指示器的磁翻板用所附磁鋼進(jìn)行一次引導,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(guò)無(wú)觸點(diǎn)報警開(kāi)關(guān)使轉換起觸點(diǎn)按液位給定值動(dòng)作從而達到液位控制的目的報警開(kāi)關(guān)安裝在液位計所需控制位置,轉換器安裝在控制室內。它是利用磁藕合原理來(lái)進(jìn)行工作的。
Whenthetopmounted3151/3051topmountedliquidleveltransmitterisused,themagneticflapoftheindicatorneedstobeguidedbythemagneticsteelattached,sothatthe3151/3051topmountedliquidleveltransmitterindicateswhiteabovethezeropositionandredbelowthezeroposition.Throughthecontactlessalarmswitch,theswitchingstartingpointactsaccordingtothegivenvalueoftheliquidlevel,soastoachievethepurposeofliquidlevelcontrol.ThealarmswitchisinstalledintheliquidlevelmeterstationTocontroltheposition,theconverterisinstalledinthecontrolroom.Itworksontheprincipleofmagneticcoupling.
不過(guò)這里現場(chǎng)需要注意的是,如果選擇DN50的法蘭,罐體頂部開(kāi)孔尺寸必須在78-80之間,配對接法蘭與頂部焊接之間的鋼管內徑也是78-80mm,而配對法蘭DN50的中心孔開(kāi)內徑也是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,就影響了法蘭對接。
However,itshouldbenotedthatiftheDN50flangeisselected,theopeningsizeatthetopofthetankmustbebetween78-80,theinnerdiameterofthesteelpipebetweenthematingflangeandthetopweldingisalso78-80mm,andtheopeningdiameterofthecenterholeofthematchingflangeDN50isalso78-80,andthethreediametersshouldbeconsistent.ItistheflangeofDN50.Thediameterofthemiddleholebecomeslargerforprocessing,sothepontooncannotbeinserted,whichaffectstheflangebuttjoint.
當然,如果按照標準DN80的選擇去做3151/3051頂裝式液位變送器,那么現場(chǎng)安裝的時(shí)候,配對法蘭直接買(mǎi)一只DN80法蘭片即可,不需要在中心孔開(kāi)大孔,DN80的中心孔直徑足夠浮筒和導桿插入。
Ofcourse,ifthe3151/3051topmountedliquidleveltransmitterisselectedaccordingtothestandardDN80,thenduringthefieldinstallation,aDN80flangecanbedirectlypurchasedfromthecompanionflange,andthereisnoneedtoopenalargeholeinthecentralhole.ThediameterofthecentralholeofDN80isenoughfortheinsertionofbuoyandguiderod.
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