Xaiv lub twj tso kua mis thiab sau cov ntaub ntawv yooj yim:
1. Cov yam ntxwv ntawm qhov nruab nrab: nruab nrab lub npe, lub ntiajteb txawj nqus, viscosity, corrosiveness, toxicity, thiab lwm yam.
2. Dab tsi yog qhov particle inch thiab cov ntsiab lus ntawm cov khib nyiab uas muaj nyob rau hauv nruab nrab.
3. Nruab nrab kub: (degree)
4. Qhov yuav tsum tau khiav ntawm cov twj tso kua mis muaj peev xwm feem ntau tsis quav ntsej txog cov dej xau hauv cov raj xa dej thaum lub sij hawm cov txheej txheem ntws, tab sis qhov cuam tshuam ntawm cov txheej txheem hloov ntawm tus nqi ntws yuav tsum tau txiav txim siab. Yog tias cov twj siv ua liaj ua teb siv qhib txoj hauv kev rau kev thauj mus los hauv dej, kev xau thiab evaporation yuav tsum tau txiav txim siab.
5. Siab: suction tank siab, kua tank siab, siab poob (lub taub hau poob) hauv cov kav dej.
6. Pipeline system cov ntaub ntawv (inch, ntev, hom thiab naj npawb ntawm pipeline accessories, geometric elevation ntawm suction tank rau siab tank, thiab lwm yam).
Thaum tsim thiab teeb tsa cov kav dej, cov ntsiab lus hauv qab no yuav tsum raug sau tseg:
1. Tsim nyog xaiv txoj kab uas hla ntawm cov kav dej. Ib txoj kab uas hla loj ntawm cov raj xa dej tuaj yeem ua rau cov kua ntws qis dua thiab qis dua qhov kev ua haujlwm tsis zoo ntawm tib tus nqi ntws. Txawm li cas los xij, vim nws tus nqi siab, lub taub me me ntawm cov raj xa dej tuaj yeem ua rau muaj kev cuam tshuam tsis zoo, ua rau muaj kev nce hauv lub taub hau thiab lub zog ntawm lub twj tso kua mis xaiv, nrog rau cov nqi siab dua thiab cov nqi khiav lag luam. Yog li ntawd, ib qho kev txiav txim siab yuav tsum tau muab los ntawm ob qho tib si technical thiab economic foundations.
2. Cov yeeb nkab tawm thiab nws cov yeeb nkab txuas yuav tsum xav txog qhov siab tshaj plaws uas lawv tuaj yeem tiv taus.
3. Cov txheej txheem ntawm cov kav dej yuav tsum tau npaj raws li cov kav dej ncaj raws li qhov ua tau, txo tus naj npawb ntawm cov khoom siv hauv cov kav dej thiab txo qhov ntev ntawm cov kav dej. Thaum nws yuav tsum tig, lub vojvoog dabtsi yog khoov ntawm lub luj tshib yuav tsum yog 3-5 lub sijhawm ntawm txoj kab uas hla ntawm lub raj xa dej, thiab lub kaum sab xis yuav tsum siab dua 90 degree ntau li ntau tau.
4. Cov li qub (pob li qub lossis lub ntiaj teb li qub, thiab lwm yam) thiab cov tshev valve yuav tsum tau muab tso rau ntawm qhov tso tawm ntawm lub twj tso kua mis. Cov li qub yog siv los kho qhov chaw ua haujlwm ntawm lub twj tso kua mis, thiab cov tshev valve tuaj yeem tiv thaiv lub twj tso kua mis los ntawm kev thim rov qab thiab tiv thaiv lub twj tso kua mis los ntawm cov dej rauj thaum cov kua ntws rov qab. Thaum cov kua ntws rov qab, lub siab rov qab loj heev yuav raug tsim, ua rau lub twj tso kua mis puas
Xaiv lub twj tso kua mis los txiav txim siab npaum li cas, lub taub hau, thiab tus nqi ntws:
1. Yog tias qhov tsawg kawg nkaus, qhov qub, thiab qhov siab tshaj plaws ntws tau muab rau hauv cov txheej txheem tsim khoom, qhov siab tshaj plaws ntws yuav tsum tau txiav txim siab.
2. If only normal flow rate is given in the production process, a certain margin should be considered. For high flow low head pumps with ns>100, tus nqi ntws ntawm 5%. Rau qis ntws siab lub taub hau twj tso kua mis nrog ns<50, a flow margin of 10% is taken. For pumps with 50 ≤ ns ≤ 100, a flow margin of 5% is also taken. For pumps with poor quality and harsh operating conditions, a flow margin of 10% should be taken.
3. Yog hais tias cov ntaub ntawv yooj yim tsuas yog muab qhov hnyav txaus tus nqi, nws yuav tsum tau hloov mus rau qhov ntim ntws.