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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(oleum)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.Definitio:

Anecessaryaccessoryforobservationinvarioussystemsorforconvertingwater(oil)flowsignalsintoelectricalsignalsinthesystem.

3.Basicparameters

1) Themaximumworkingpressureofthewaterflowindicatorisrespectively 0.25/0.6/1.0/1.6/2.5/4.0MPa

2) Nominaldiameter

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

NominaldiameterofflangetypewaterflowindicatorisDN15-DN600

4.Technicalrequirements

I) Maximumworkingpressure

Themaximum opus pressure of the waterflowindicatordependsonthecaliber:0.25/0.6/1.0/1.6/2.5/4.0MPa

II) Delayperformance

Thedelaytimeofthewaterflowindicatorwithdelayfunctionshouldbeadjustable.

Thedelaytimemeasuredbythewaterflowindicatortestshouldbewithintherangeof2s-90s.

III) Workingcycle

Thewaterflowindicatoristested,after500cyclesofaction,theactionshouldbesensitiveandresetquicklyduringthetest.

IV) Corrosionresistentia

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

5) Rigidnon-metallicmaterials

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

VI) Impactresistance

Afterthree6.8Jenergyimpacts,theremustbenoloosepartsthathindertheactionofthewaterflowindicator.

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

7) Wateragingresistanceofelasticnon-metallicgaskets

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

VIII) Sensibilitas

Thewaterflowindicatorshouldbetestedforsensitivityaccordingtothestandard,andthetestresultsshouldmeetthefollowingrequirements:

aFlowratelessthanorequalto15.0L/Atmin, aquarum defluxus notalarm;

bThealarmflowateshouldbeanyvaluebetween15.0L/min-37.5L/min, and whenitreaches37.5L/min,itmustalarm;

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cThealarmflowateshouldnotbegreaterthan37.5L/min,

Thetestpressurerangeisbetween0.14MPa-1.2MPa.

9) Hydraulicfrictionloss

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

X) Waterimpactresistance

Thewaterimpacttestiscarriedoutaccordingtothestandard,anditshouldberesetquicklyafterbeingimpactedbywater.Andasensitivitytestshouldbecarriedoutafterthetest,andthetestresultshouldmeetthestandardrequirements.

XI) Waterpressureresistance

Under2.4MPa aqua pressio for5minutes,theremustbenocracks, ultrices, permanent deformationordamage.

XII) 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

I) Productstandard

1.Waterflowindicatorstructurematerial:

II.Maintenance and Maintenanceofglasswindows

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

2.Thewindowglassoftheimpellersightglassissuitablefordamage,sobecarefulwheninstallingthesightglass.

3.Thetemperatureandpressureresistanceofthesightglasshascertainlimitations,dependingontheactualsituation.

Thefollowingprovidesthephysicalexperimentparametersofthenationalstandardglassmanufacturingprocess:

Temperature: temperansborosilicateglass≤200℃,quatzglass≤1000℃,aluminosilicateglass≤450℃

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Pressura: temperansborosilicateglasssheet≤2.5MPa,quartzglasssheet≤10.0MPa,aluminosilicateglass≤6.4MP

4,allowrapidtemperaturechange<60℃,glassduetotemperaturedifferenceGreatlycauserupture.

Glassinspectionstandard:Design,manufactureandaeceptancereferto"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) arerespectively placedontheobservationwindow(2) and fixed withthevalvebody(1), aflowindicatormechanismismisplacedinthevalvecavity5, whichincludesarotorshaft(15), therotor(19), thes(14) andapairofshaftseats(12), the twoends oftherotorshaft(15) areinsertedin the shaft isloopedontherotorOntheshaft(15), theblades(14) areextendedontherotor(19), andpairofshaftseats(12) arerespectively accommodatedintheblindholes(10).