Flow indicator

Overview

Waterflowindicatorsaredividedintotwocategories:impellertype;floatingballtypenickname(throughimpellermirror,impellermirror,straightfloatmirror,floatmirrorLiquidflowobserver,flowindicator,flowmonitor,single-tubestraight-throughflowsightglass)isastraight-throughsightglass,whichisanecessaryaccessoryforobservingtheflowofthemediuminthepipeline.Thesightglassisusedinindustrialproductionequipmentsuchaspetroleum,chemicalindustry,chemicalfiber,medicine,food,etc.Itcanobservetheflowreactionofliquid,gas,steamandothermediaatanytime.Itisanindispensableaccessorytoensurenormalproduction.Waterflowindicatorsincludethreadedwaterflowindicators,weldedwaterflowindicators,flangedwaterflowindicators,saddle-typewaterflowindicators,andsaddle-typewaterflowindicators.

Thewaterflowindicatorcanalsobeusedinautomaticsprinklersystems.Itcanbeinstalledonthemainwatersupplypipeorthehorizontalmainpipetogiveanelectricalsignalofwaterflowinasmallareaof​​acertainsubregion.ThiselectricalsignalcanbeSenttotheelectriccontrolbox,butusuallynotusedasacontrolswitchtostartthefirepump.

One.Model

ThenicknameoftheSG-YLwater(oil)flowindicatormodel(ZGA-1;ZGA-2;ZGA-3;ZGA-4impellertypeSJ-YLimpellertypeobserverSJ-ZTstraight-throughflowsightglass)

SG-FQfloatindicatormodelnickname(GBA-1GBA-2GBA-3GBA-4balltypeZBA-1ZBA-2ZBA-3ZBA-4(floatingballtype)

SG-IIstraight-throughtype

SG-IIIthree-waytype

SG-BBswingplatetype

SG-BLglasstubetype

SG-ZZpointertype

SG-NZbackstoptype

ModelSGEqualtoSJ

1.Overview:

Suitableforawiderangeofindustriessuchasblastfurnacecoolingsystem,powerplantwatercirculationsystem,water(oil)pumpindicatingsystem,lubricationsystem,automaticsprinklersystem,etc.application.

2.Definition:

Anecessaryaccessoryforobservationinvarioussystemsorforconvertingwater(oil)flowsignalsintoelectricalsignalsinthesystem.

3.Basicparameters

1)Themaximumworkingpressureofthewaterflowindicatorisrespectively0.25/0.6/1.0/1.6/2.5/4.0MPa

2)Nominaldiameter

Threaded/weldednominaldiameterDN6-DN80(G1/8-G3)

NominaldiameterofflangetypewaterflowindicatorisDN15-DN600

4.Technicalrequirements

1)Maximumworkingpressure

Themaximumworkingpressureofthewaterflowindicatordependsonthecaliber:0.25/0.6/1.0/1.6/2.5/4.0MPa

2)Delayperformance

Thedelaytimeofthewaterflowindicatorwithdelayfunctionshouldbeadjustable.

Thedelaytimemeasuredbythewaterflowindicatortestshouldbewithintherangeof2s-90s.

3)Workingcycle

Thewaterflowindicatoristested,after500cyclesofaction,theactionshouldbesensitiveandresetquicklyduringthetest.

4)Corrosionresistance

Thewaterflowindicatorissubjectedtothecorrosiontestaccordingtothestandard.Afterthetest,anypartofthewaterflowindicatormustnotshowcorrosiondamagesuchascracksthataffecttheperformance.Afterthetest,itshouldgothroughthe6.8sensitivitytest,andthetestresultshouldmeetthestandardrequirements.

5)Rigidnon-metallicmaterials

Aftertheairagingtest,thetestpieceshallnotbebent,creeped,crackedorotherwisedamagedthataffectsthefunctionofthewaterflowindicator.Ifthebladeismadeofpolyethylenematerialandhastheabilitytowithstandenvironmentalstresscracking,thebladeshouldbefreeofcracksafterthetest.

6)Impactresistance

Afterthree6.8Jenergyimpacts,theremustbenoloosepartsthathindertheactionofthewaterflowindicator.

Afterthetest,theshellofthewaterflowindicatorshouldbechecked.Iftheshellisbrokenanddoesnotaffecttheactionofthewaterflowindicator,itisqualified.Iftheshellisusedtopreventdustormoisture,andtheshellisbroken,thewaterflowindicatorisnotqualified.

7)Wateragingresistanceofelasticnon-metallicgaskets

Thewateragingtestofelasticnon-metallicgasketsiscarriedout,exceptforO-rings.Afterthetest,checkthegapbetweenthegasketandthefixturetoensurethatthereisnolooseness,adhesion,andbrittlenessorsoftnessofthegasket.

8)Sensitivity

Thewaterflowindicatorshouldbetestedforsensitivityaccordingtothestandard,andthetestresultsshouldmeetthefollowingrequirements:

aFlowratelessthanorequalto15.0L/Atmin,thewaterflowindicatorshouldnotalarm;

bThealarmflowrateshouldbeanyvaluebetween15.0L/min-37.5L/min,andwhenitreaches37.5L/min,itmustalarm;

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cThealarmflowrateshouldnotbegreaterthan37.5L/min,

Thetestpressurerangeisbetween0.14MPa-1.2MPa.

9)Hydraulicfrictionloss

Undertheconditionofthewatervelocityof4.5m/sinthetestpipeline,thepressurelosscausedbythehydraulicfrictionofthewaterflowindicatorshallnotexceed0.02MPa.

10)Waterimpactresistance

Thewaterimpacttestiscarriedoutaccordingtothestandard,anditshouldberesetquicklyafterbeingimpactedbywater.Andasensitivitytestshouldbecarriedoutafterthetest,andthetestresultshouldmeetthestandardrequirements.

11)Waterpressureresistance

Under2.4MPawaterpressurefor5minutes,theremustbenocracks,leakage,permanentdeformationordamage.

12)Overloadcapacity

Whenthewaterflowindicatoristestedinaccordancewiththestandard,itscomponentsmustnotbeburntduetooverheating,pits,orcontactbonding.

13)Withstandvoltagecapabilityandinsulationresistance

(1)Thewaterflowindicatorshallbetestedforthewithstandvoltagecapabilityaccordingtothestandard.Underthespecifiedtestvoltage,betweenthefollowingpartsWithstandvoltage60s±5swithoutbeingbrokendown.

aBetweenallmovingpartsandstaticmetalparts(includingthehousing);

bMovingpartsofcircuitsthatworkunderdifferentvoltagesanddifferentfrequencies.

(2)Thewaterflowindicatormeasurestheinsulationresistance,andtheinsulationresistancebetweenthefollowingpartsshouldbegreaterthan2MΩ.

aWhenthecontactisopen,betweentheincomingandoutgoingwiresofthesamepole;

bWhenthecontactisclosed,betweenthelivepartsofdifferentpoles,thecontactandthecoilandthecontrolBetweencircuits;

cBetweeneachlivepartandthemetalbracket(includingthehousing).

5.Keypointsofconstructionandinstallation

1)Generallyinstalledonthehorizontalbranchmainpipeoneachfloororbranchmainpipeinacertainarea.

2)Itshouldbeinstalledhorizontally,andtheinclinationshouldnotbetoolargetoensurethatthebladesaresensitive.Thereshouldbestraightpipeswith5timesthelengthoftheinstallationpipediameterbeforeandafterthewaterflowindicator.Payattentiontothewaterflowdirectionandindicatorwheninstalling.Thearrowsareconsistent.

3)Thesignalvalveshouldbeinstalledonthepipelinebeforethewaterflowindicator,andthedistancefromthewaterflowindicatorshouldnotbelessthan300mm.

4)Thewaterflowindicatorissuitableforinstallationonpipeswithadiameterof50-150mm.

6.Executivestandard

1)Productstandard

1.Waterflowindicatorstructurematerial:

II.Maintenanceandmaintenanceofglasswindows

1.Theimpellersightglassisusedtoobservetheflowreactionequipmentofliquid,gas,steamandothermedia.Thewindowglassshouldbekeptcleananddust-free.

2.Thewindowglassoftheimpellersightglassissuitablefordamage,sobecarefulwheninstallingthesightglass.

3.Thetemperatureandpressureresistanceofthesightglasshascertainlimitations,dependingontheactualsituation.

Thefollowingprovidesthephysicalexperimentparametersofthenationalstandardglassmanufacturingprocess:

Temperatureresistance:temperedborosilicateglass≤200℃,quartzglass≤1000℃,aluminosilicateglass≤450℃

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Pressureresistance:temperedborosilicateglasssheet≤2.5MPa,quartzglasssheet≤10.0MPa,aluminosilicateglass≤6.4MP

4,allowrapidtemperaturechange<60℃,glassduetotemperaturedifferenceGreatlycauserupture.

Glassinspectionstandard:Design,manufactureandacceptancereferto"ChemicalPipelineManual"andHGJ501-502-86"PressureWindowSightGlass".

"AutomaticSprinklerSystemPart7:WaterFlowIndicator"GB5135.7-2003

Diagramanddecompositioninstructions

Awaterflowindicator,Itischaracterizedinthatitincludesavalvebody(1),apairofsteps(6)aresymmetricallyformedontheupperandlowersidesofthevalvecavity(5)ofthevalvebody(1),andtheleftandrightsidesofthevalvebody(1)extendrespectivelyThereisapipesection8;apairofsealingrings(4)arerespectivelyarrangedonthestep(6);apairofobservationwindows(2)arerespectivelylocatedonthesealingring(4),eachwithablindhole(10);Apairofobservationwindowfixingcovers(3)arerespectivelyplacedontheobservationwindow(2)andfixedwiththevalvebody(1);aflowindicatormechanismisplacedinthevalvecavity5,whichincludesarotorshaft(15),Therotor(19),theblades(14)andapairofshaftseats(12),thetwoendsoftherotorshaft(15)areinsertedintotheshaftholes(13)oftheshaftseat(12),andtherotor(19)isloopedontherotorOntheshaft(15),theblades(14)areextendedontherotor(19),andapairofshaftseats(12)arerespectivelyaccommodatedintheblindholes(10).