Kev siv cov khoom tsim nyog, txhim kho thiab tswj kev tiv thaiv rov qab tuaj yeem zam qhov kev pheej hmoo ntawm cov xwm txheej tshwm sim los ntawm kev tiv thaiv siphon thiab rov qab siab.
Kev rov qab mus txuas ntxiv ua rau muaj kev hem thawj loj rau peb cov dej tshiab. Vim muaj kev sib txuas ntawm cov dej haus thiab qhov chaw xav tias muaj cov dej siv, cov kua dej ua haujlwm, roj, lossis lwm yam khoom siv sib kis, cov xwm txheej rov qab yuav nyuaj los xyuas tshwj tsis yog tias tsis muaj qhov tsis zoo thiab cov tsos mob hnyav. Kev siv cov khoom tsim nyog, txhim kho thiab tswj kev tiv thaiv rov qab tuaj yeem zam qhov kev pheej hmoo ntawm cov xwm txheej tshwm sim los ntawm kev tiv thaiv siphon thiab rov qab siab.
Kev qhia txog cov tshuaj reflow raug yog nyob ntawm daim ntawv thov. Nws yog ib qho tseem ceeb kom paub txog qhov tsis zoo ntawm cov kav dej uas twb muaj lawm. Cov hauv qab no yog 10 qhov kev txiav txim siab thaum qhia meej.
Nyob rau hauv cov nqe lus ntawm kev txo qhov kev poob siab, kev khiav hauj lwm yog ib qho tseem ceeb vim hais tias qhov muaj siab ntawm tag nrho cov system yuav tsum tau xam thaum lub sij hawm tsim txheej txheem. Yog tias lub siab poob siab dhau lawm rau lub kaw lus kom muaj lub siab txaus rau nws cov khoom, nws yuav txhais tau hais tias lub twj tso kua mis yuav tsum tau ntxiv lossis yuav tsum tau siv cov kav dej loj dua, ob qho tib si yuav ua rau tus nqi ntau. Txawm hais tias kev poob siab yog ib qho kev txhawj xeeb hauv txhua lub tshuab, nws yog ib qho tseem ceeb tshwj xeeb hauv kev tiv thaiv hluav taws.
Tag nrho cov reflow manufacturers luam tawm siab / ntws nkhaus rau lawv cov cuab yeej. Thaum sib piv cov nkhaus ntws, xyuas kom tseeb tias lawv txhua tus qhia tib qhov xwm txheej-vim tias qhov nce ntws nkhaus thiab qhov txo qis qis feem ntau sib txawv.
Tag nrho cov theoretical xav tau ntawm cov khoom siv dej yog xam los ntawm kev ntxiv cov kev xav tau siab tshaj plaws ntawm tag nrho cov khoom siv hauv qhov system. Cov yam ntxwv ntws ntawm cov khoom xa rov qab tuaj yeem cuam tshuam ncaj qha rau tag nrho cov dej ntws ntawm lub tsev cov dej haus lossis hluav taws tua hluav taws. Thaum xaiv, thov ua tib zoo saib xyuas cov kev xav tau ntawm lub tsev.
Ntawm qhov siab tshaj plaws ntawm kev siv ib txwm, koj tsis xav kom tshaj qhov ntsuas txaus, saum toj no uas koj yuav ntsib kev hnav thiab tsim kua muag. Rau qhov hluav taws kub sib ntaus sib tua, qhov hluav taws kub ntws tag nrho yuav tsum tsis pub tshaj UL rated flow rate ntawm lub valve.
Txawm hais tias muaj kev siv zog zoo tshaj plaws, kev ua haujlwm ib txwm muaj thiab cov khoom siv sab nraud uas tsis tuaj yeem zam tau (xws li cov khib nyiab ntau dhau hauv dej) tseem tuaj yeem ua rau cov khoom tiv thaiv rov qab los hnav. Lub backflow tiv thaiv inevitably xav tau kev saib xyuas, uas yuav tsum tau ua los ntawm ib tug kws kav dej.
Muaj ntau ntau yam uas yuav tsum tau xav txog thaum xaiv cov khoom tiv thaiv rov qab: Nws yooj yim npaum li cas rau kev nkag mus rau cov khoom siv sab hauv? Cov khoom puas tuaj yeem kho cais? Lawv puas muaj nyob txhua lub sijhawm? Cov khoom xws li lub siab nyem valve lossis kaw-off valve puas tuaj yeem raug tshem tawm los kho lossis hloov? Qhov kev kho nyuaj dua thiab siv sijhawm ntev dua, tus nqi kho ntau dua.
Daim ntawv thov tej yam kev mob yuav muaj kev cuam tshuam loj rau kev tsim, kev teeb tsa thiab kev siv nyiaj txiag ntawm qhov system. Cov tub ceev xwm hauv cheeb tsam muaj kev txiav txim siab txog hom li qub siv hauv txhua hom kev thov. Tag nrho qhov ntev ntawm lub valve feem ntau tuaj yeem pom nyob rau hauv cov ntaub ntawv cov ntaub ntawv muab los ntawm cov chaw tsim khoom, uas yog qhov tseem ceeb thaum hloov daim ntawv thov uas twb muaj lawm. Yog tias qhov chaw nyob ntawm tus nqi them, nws tuaj yeem cuam tshuam rau kev teeb tsa tshiab.
Hom kev ib puag ncig twg yuav lub cuab yeej nyob hauv? Piv txwv li, decompression zone Cheebtsam yuav tsis siv nyob rau hauv underground tanks los yog pits vim hais tias lawv yuav submerged. Kuj xav txog seb huab cua lub valve yuav raug rau thiab yuav ua li cas nws yuav cuam tshuam rau cov khoom raug.
Qhov hnyav ntawm kev xaiv cov khoom siv feem ntau yog tus nqi ua haujlwm cuam tshuam nrog kev tuav thiab kev teeb tsa. Tsis tas li ntawd, thov xav txog yam khoom uas nws yog ua los ntawm. Cov ntaub ntawv sib xyaw thiab cov hlau tsis muaj steel feem ntau sib dua li cov hlau cam khwb cia lossis cov hlau tsis huv. Qhov me dua qhov zoo dua, vim tias nws tuaj yeem tso qhov chaw ntxiv rau qhov xav tau ntau li qub hauv qhov system thiab siv qhov chaw tsawg dua hauv chav tshuab.
Backflow tiv thaiv cov cuab yeej raug teeb tsa hauv ntau qhov chaw, los ntawm cov chaw qhib loj mus rau cov chav computer me. Lawv tau tsim los tso cai rau ntau qhov kev teeb tsa, ua rau cov kws tsim qauv tsim kho cov cuab yeej siv rau hauv qhov chaw. Mounting xaiv yog kab rov tav [feem ntau], ntsug, "N" hom thiab "Z" hom.
Feem ntau hais lus, qhov kev ua haujlwm ntawm lub valve yuav luag tsis hloov raws li nws qhov kev teeb tsa; Txawm li cas los xij, koj yuav tsum tau nyeem cov chaw tsim khoom cov ntaub ntawv xov xwm thiab sab laj nrog tus kav dej hauv zos ua ntej txiav txim siab yuav khoom.
Txoj hauv kev los ntsuas lub valve yog nyob ntawm qhov yuav tsum tau ua ntawm chav dej hauv zos, tab sis lub valve nws tus kheej yuav cuam tshuam qhov nyuaj ntawm kev ntsuas valve thiab kev daws teeb meem. Tus tester yuav tsum tau siv lub tshuab kuaj qaib txhawm rau txhawm rau ntsuas kev ua haujlwm ntawm cov cuab yeej siv tau zoo. Yog tias lub valve muaj kev tshem tawm txaus ntawm txhua sab, qhov no feem ntau tsis muaj teeb meem, tab sis thaum qhov no tsis tuaj yeem ua tsis tau (ua txhaum lub chaw tsim khoom cov lus pom zoo) lossis thaum lub valve raug hloov kho, phab ntsa lossis cov kav dej uas twb muaj lawm yuav ua rau nws nyuaj lossis tsis tuaj yeem nkag mus rau Kev Xeem. qaib ntxhw-qhov no yuav ua rau rov ua cov kav dej lossis ua tiav lub valve hloov.
Ntxiv nrog rau kev sim lub valve, ib qho kev siv ntawm qhov ntsuas qaib yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm Ib qho kev sim loj dua yuav tso cai rau ntau qhov ntws, yog li ua rau koj muaj feem yuav tshem cov khib nyiab. Txhawm rau kuaj thiab daws teeb meem ntawm lub valve, nws yog ib qho tseem ceeb uas tsawg kawg yog lub valve kaw kaw nruj nreem kaw thiab tsis xau. Vim li no, kev kaw haujlwm zoo yog ib feem tseem ceeb ntawm cov khoom xa rov qab, thiab lub peev xwm los kho lawv kom lub valve tuaj yeem kuaj tau dua yog qhov tseem ceeb.
Thaum qhia txog kev tiv thaiv kev thim rov qab, muaj ntau qhov kev xaiv kaw-off valve muaj, suav nrog: Pob li qub - feem ntau yog siv rau 2-nti sib dhos. Thiab ua kom yooj yim qhib lossis kaw ntawm ¼ iav; npauj npaim valve-thaum yuav tsum muaj qhov sib tw luv, nws tuaj yeem maj mam kaw los ntawm kev ua haujlwm iav kom tsis txhob muaj dej rauj (qhov yuav tsum tau muaj kev tiv thaiv hluav taws), lossis hluav taws xob tswj; NRS [kab tsis yog ntsug] Rooj vag valve-zoo tagnrho thaum koj tsis muaj qhov sib txawv saum lub tes tuav thiab tsis tas yuav pom qhov pom ntawm txoj haujlwm (qhib / kaw); OSY [sab sab qia thiab yoke] rooj vag valve-tus qauv teeb tsa ntawm qhov loj-ntev hluav taws li qub, vim tias qhov nce valve qia muab qhov pom kev pom ntawm txoj haujlwm thiab tuaj yeem ntsia tau nrog qhov hloov pauv tamper; PIV [Kem Indicator Valve]-feem ntau yog ib qho kev xaiv rau NRS lub rooj vag li qub, cov li qub no tau tsim los txuas rau kem uas yuav qhia pom qhov muag ""Qhib" lossis "kaw" thiab feem ntau yog siv hauv kev tiv thaiv hluav taws thaum lub valve tsis yog. siv tau, xws li hauv av lossis tom qab phab ntsa.
Nws yog ib qho tseem ceeb kom nkag siab txog koj cov kev cai hauv zos thiab cov cai, vim tias cov cuab yeej yuav raug tso cai siv rau hauv daim ntawv thov hauv ib cheeb tsam, tab sis suav tias tsis txaus nyob rau hauv cheeb tsam tom ntej. Nws raug nquahu kom muaj kev sib raug zoo nrog koj tus kws tshuaj xyuas cov kav dej hauv zos thiab chav dej kom koj tuaj yeem zam qhov kev soj ntsuam tsis ua haujlwm lossis teeb tsa cov khoom siv kim dua thaum cov khoom siv nyiaj txiag ntau dua raws li qhov xav tau.
Muaj cov peev txheej muaj los muab cov ntaub ntawv, kev kawm, kev tshuaj ntsuam xyuas khoom thiab ntawv pov thawj, tsim kev tshuaj xyuas cov khoom, thiab kev pab tsim cov cai. Cov koom haum no tuaj yeem pab: IAPMO-International Association of Plumbing and Machinery Officials (IAPMO) iapmo; USC Cross-Connect Control thiab Hydraulic Research Foundation, fccchr.usc.edu; thiab American Society of Sanitary Engineers (ASSE), asse-plumbing.org.
Cov neeg ua haujlwm kav dej, cov neeg cog lus, thiab cov kws tsim khoom muaj ntau txoj hauv kev los txheeb xyuas, npaj thiab tiv thaiv kev cuam tshuam rov qab ua ntej lawv tshwm sim, tab sis kev hloov cov kav dej thiab cov kav dej nyuaj ua rau nws nyuaj rau kev taug kev. Kev txheeb xyuas qhov tseeb rov qab tiv thaiv yog thawj kauj ruam hauv kev nyab xeeb thiab txhim khu kev qha dej.
Toronto City Council tab tom txiav txim siab ua kom ceev cov tswv yim huab cua. https://www.hpacmag.com/green-technology/toronto-city-council-to-think-accelerated-climate-strategy/1004133508/
Quebec cov kev cai txwv tsis pub siv roj hauv tsev tshiab. https://www.hpacmag.com/construction/new-residential-fuel-oil-ban-regulation-in-quebec/1004133504/
Manitoba yuav faib nyiaj los txhim kho lub tsev kawm ntawv lub qhov cua. https://www.hpacmag.com/human-resources/manitoba-to-dedicate-funding-towards-upgrading-ventilation-systems-in-schools/1004133501/
Ontario nqis peev los nyiam cov tub ntxhais hluas los ua haujlwm hauv kev lag luam thev naus laus zis. https://www.hpacmag.com/construction/ontario-makes-investment-to-attract-young-people-to-skilled-trades-careers/1004133485/
Video: ASHRAE hais txog kev hloov pauv huab cua ntawm COP26 https://www.canadianconsultingengineer.com/?p=1003413735
Post lub sij hawm: Dec-01-2021
