Xov xwm

Thaum Zonel Filtech pab cov neeg siv khoom txhim kho lawv cov khoom siv plua plav, qee qhov ntawm lawv tau yws tias cov txheej txheem purging ntawm lawv.hnab lim vaj tsevtsis ua haujlwm zoo txawm tias lawv siv cov cua ua yeeb nkab rau ntawm cov yeeb nkab cua tshuab, nrog rau lub venturi, thiab tseem muaj qhov tseeb siab rau cov cua compressed, yog li lawv tsis tuaj yeem nrhiav kev daws teeb meem los txhim kho cov haujlwm purging.

Tom qab txheeb xyuas lawv cov txheej txheem purging, Zonel engineers tau pom qhov laj thawj tseem ceeb yog tias qhov kev ncua deb ntawm lawv cov pa ua yeeb nkab rau lub hnab raj ntawv tsis raug. Yog hais tias qhov deb loj dhau lawm, huab cua yuav tshuab qee yam rau lub hnab ntim ntawv hloov mus rau hauv lub hnab lim; ntawm qhov tsis sib xws, yog tias me me, cov cua nias tsis tuaj yeem ua rau huab cua txaus sab nraud rau hauv lub hnab lim, cov nyhuv purging yuav tsis zoo.

Tab sis yuav ua li cas los txhais qhov kev ncua deb (H1 hauv cov duab hauv qab no)?

1.Ua ntej, koj yuav tsum tau txhais qhov nruab nrab tus nqi ntawm Øp hauv daim duab.
Raws li niaj zaus, peb suav cov Øp nrog cov qauv hauv qab no:
Øp=(C*D^2/n) ^1/2
C = Coefficient, raws li ib txwm xaiv 50% ~ 65%.
D = pulse dav hlau lub qhov hluav taws xob txoj kab uas hla, raws li ib txwm zoo tib yam rau cua tshuab raj.
n = lub hnab lim tus naj npawb ib kab (purging nrog tib lub dav hlau mem tes valve)
Raws li ib txwm muaj, C peb xaiv 0.55.
Feem ntau, huab cua ua yeeb nkab txoj kab uas hla yog 2 ~ 3 npaug ntawm Øp.

 

2.Txhais qhov ntev ntawm huab cua ua yeeb nkab.
Cua ua yeeb nkab li niaj zaus siv cov qauv hauv qab no:
L = Ck* Øp/K
Ck = coefficient, raws li ib txwm xaiv 0.2 ~ 0.25
K = yog dav hlau turbulence coefficient, cylindrical xaiv 0.076.
ie L = 0.2 * Øp / 0.076 = 2.65 Øp

 

3.Nws yooj yim heev kom tau txais tg degree = (1/2 Øb)/H2
tg a degree = 3.4K = 0.272 (yuav kho tau raws li qhov tsis tu ncua)
Yog li ib degree xaiv 15 degree.

 

Piv txwv li:
Yog tias xaiv 3 "immerged mem tes dav hlau valve, ua yeeb nkab d = 30mm, lim hnab txoj kab uas hla yog 160mm, yuav ua li cas kom tau H1.
Teb:
Obviously, H1 = H2-L
Yog li peb yuav tsum txhais H2 thiab L.

tg a degree =(1/2 Øb)/H2=3.4K=0.272
ie H2 = 1.838 Øb

Øb = 160 mm
H2 = 294 mm

3 "raws li ib txwm muaj qhov nruab nrab Øp = 15 mm (kuj tuaj yeem xam thaum lub hnab qty muab, lossis raws li cov ntaub ntawv kev paub dhau los, txuas ntxiv thov nrhiav.)
Los ntawm qhov tshwm sim dhau los, L = 2.65 Øp, yog li L = 2.65 * 15 = 40 mm
Yog li H1 = 294-40 = 254mm.

 

Rau Qp, feem ntau cov ntaub ntawv nruab nrab tuaj yeem xaiv tau raws li hauv qab no:
Pulse dav hlau valve loj ---- Qp
3/4 "---- 5 ~ 7mm
1" ---- 6-8mm
1 1/2 "---- 7-9mm
2 "---- 8-11mm
2 1/2 "---- 9-14mm
3" ---- 14 ~ 18mm
4 "---- 16-22mm

 

Raws li ib txwm muaj, thaum Qp tsim yuav muab faib ua 3 ~ 4 pawg, ze rau lub dav hlau pulse valve, qhib qhov loj dua, thiab pab pawg rau cov kab sib txawv ntawm 1 hli.