Feem ntau cov tshev valve sizing yog raws li kev soj ntsuam zoo ntawm qhov tsawg kawg nkaus poob siab los yog tsis muaj kev poob siab kaw thiab qhov yuav tsum tau kaw ceev thiab nws kaw ceev yam ntxwv.

1. ZF8006 Stainless hlau poj niam xov viav vias kos valve DN20rau cov kua dej incompressible

Kos li qub rau cov kua dej tsis sib haum yog xaiv feem ntau rau lawv lub peev xwm kaw yam tsis ua rau muaj qhov tsis txaus ntseeg siab vim tias kaw tam sim vim rov qab ntws.Kev siv cov tshev li qub raws li qhov qis qis qis qis feem ntau tsuas yog qhov kev txiav txim siab thib ob.

Rau xws li ib daim tshev valve, thawj kauj ruam yog ntsuas qhov yuav tsum tau kaw ceev.

Lub siab zoo li qub nce hauv cov raj xa dej thaum lub valve kaw sai yog txiav txim los ntawm Rukovsky raws li:

Nyob rau hauv cov mis △р-siab nce txheeb ze rau ib txwm siab (MPa);

υ-ceev ntawm kev cuam tshuam beam (m / s);

α-siab yoj kis ceev (m / s);

ρ-kua ntom ntom (kg / m3);

K-Liquid elastic modulus (MPa);

E-lub elastic modulus ntawm cov yeeb nkab phab ntsa khoom (MPa);

D-pipe sab hauv txoj kab uas hla (m);

e-phab ntsa thickness (m);

C-pipeline txwv coefficient, coj 1.0 rau cov kav dej tsis txwv;

B- tas li.

Thaum siv cov yeeb nkab steel nrog D / e piv ntawm 35 thiab cov dej nruab nrab, lub siab nthwv dej tshaj tawm yog li 1200m / s.Thaum lub nrawm nrawm hloov mus rau 1m / s, qhov nce siab zoo li qub yog Δр = 1.2MPa.

Cov kauj ruam thib ob yog xaiv hom kev kos valve uas yuav ua tau raws li qhov yuav tsum tau kaw ceev.

2. Kos valve rau compressible kua

Txawm hais tias lub hom phiaj ntawm kev xaiv lub pob valve rau cov kab dej compressible yog kom txo qis qhov cuam tshuam ntawm lub valve nrov plig plawg, nws tuaj yeem raug xaiv raws li kev xaiv zoo sib xws rau lub valve tsis rov qab rau cov kua dej tsis txaus.Txawm li cas los xij, rau cov kav dej loj heev, qhov cuam tshuam ntawm qhov nruab nrab compressive kuj tuaj yeem ua rau muaj txiaj ntsig.

Yog tias qhov ntws ntawm qhov nruab nrab fluctuates dav, daim tshev valve rau compressible kua tuaj yeem siv cov cuab yeej txo.Cov cuab yeej no ua haujlwm thoob plaws lub valve txav ntawm qhov kaw kom tiv thaiv kev nrawm nrawm ntawm rauj tshuab mus rau qhov kawg.

Lub tshuab nqa nqa valve yog siv yog tias qhov nruab nrab ntws nres thiab pib sai thiab tsis tu ncua, xws li ntawm qhov hluav taws xob ntawm lub compressor.Lift check li qub siv lub caij nplooj ntoos hlav-loaded disc uas tsis muaj siab nqa.

3. Kev txiav txim siab ntawm daim tshev valve loj

Lub check valve yuav tsum tau qhov loj me kom cov kua dej ib txwm ua kom lub kaw ruaj khov qhib.Rau lub sijhawm kaw siab tshaj plaws, lub tshev valve yuav tsum pib kaw kom sai li sai tau tom qab qhov nrawm ntawm qhov nruab nrab qis pib qeeb.Txhawm rau kom lub valve kom loj nyob rau hauv cov ntaub ntawv no, lub valve chaw tsim tshuaj paus yuav tsum muab cov ntaub ntawv nyob rau hauv lub xaiv loj.Daim duab 3-517 qhia ib qho piv txwv ntawm cov ntaub ntawv profile.Lub siab poob yog muab rau cov kua;lub siab qhib txoj hauj lwm ntawm lub valve yog cim rau ntawm cov kua index nkhaus.Cov kua ntsuas W / A tau muab rau ntawm no, qhov twg W yog tus nqi ntws (m / s), V yog qhov ntim tshwj xeeb (m3), thiab A yog qhov chaw ntws (m2).Kuj tseem muaj ib lub rooj nyob rau hauv daim duab 3-517 uas qhia txog thaj tsam ntawm lub qhov rau ib qho loj valve.Nyob rau hauv txoj kev no, nws yuav tsum muaj peev xwm nrhiav tau qhov loj ntawm lub valve thaum lub valve qhib tag nrho rau qhov muab txaus txaus.

4. Kev xaiv hom kos valve

(1) Rau siab thiab nruab nrab siab check li qub hauv qab DN50mm, ntsug nqa check li qub thiab ncaj-los ntawm nqa check li qub yuav tsum tau xaiv.

(2) Rau qhov ntsuas qis qis qis hauv qab DN50mm, npauj npaim kos li qub, ntsug nqa daim tshev li qub thiab diaphragm kos li qub yuav tsum raug xaiv.

(3) Rau siab thiab nruab nrab siab check li qub nrog DN ntau dua 50mm thiab tsawg dua 600mm, viav vias kos li qub yuav tsum raug xaiv.

(4) Rau nruab nrab thiab tsis tshua muaj siab check li qub nrog DN ntau dua 200mm thiab tsawg dua 1200mm, tsis hnav kheej kheej kos li qub yuav tsum tau xaiv.

(5) Rau qhov ntsuas qis qis nrog DN ntau dua 50mm thiab tsawg dua 2000mm, npauj npaim kos li qub thiab diaphragm kos li qub yuav tsum tau xaiv.

(6) Rau cov kav dej uas yuav tsum tau kaw lub raj xa dej nrog me me los yog tsis muaj dej rauj cuam tshuam, qhov qeeb-kaw viav vias kos valve thiab qeeb-kaw npauj npaim valve yuav tsum tau xaiv.

(7) Rau lub twj tso kua mis inlet pipeline, lub hauv qab valve yuav tsum tau xaiv.