Ngokubanzi, iivalvu zemizi-mveliso azifakwa kuvavanyo lwamandla xa zisetyenziswa, kodwa umzimba wevalve kunye nesigqubuthelo sevalvu emva kokulungiswa okanye isivalo somzimba wevalvu kunye nesigqubuthelo sevalvu enomonakalo wokudusa kufuneka zifakwe kuvavanyo lwamandla. Kwiivalve zokhuseleko, uxinzelelo olubekiweyo kunye noxinzelelo lwesihlalo sokubuyela kunye nezinye iimvavanyo kufuneka zihambelane nemimiselo yemiyalelo yazo kunye nemimiselo efanelekileyo. Ivalve kufuneka ibe phantsi kovavanyo lwamandla kunye nokutywinwa emva kokufakwa. I-20% ye-low-pressure valves ihlolwe ngokungakhethiyo, kwaye ukuba ayinakufaneleka, kufuneka ihlolwe i-100%; Izivalo eziphakathi kunye neziphezulu zoxinzelelo kufuneka zihlolwe i-100%. Imithombo yeendaba edla ngokusetyenziswa kuvavanyo loxinzelelo lwevalvu ngamanzi, i-oyile, umoya, umphunga, initrogen, njalo njalo.

1. Indlela yokuvavanya uxinzelelo kwiivalvu zebhola

Uvavanyo lwamandla eevalvu zebhola yepneumatic kufuneka lwenziwe ngebhola evulekileyo.

① Uvavanyo lokutywina ivalve yebhola edadayo: beka ivalve kwindawo evulekileyo, yazisa indawo yovavanyo kwelinye icala, kwaye uvale esinye isiphelo; vula ibhola ngamaxesha amaninzi, vula isiphelo esivaliweyo xa i-valve ikwimeko evaliweyo, kwaye ukhangele ukusebenza kokutywinwa kokupakisha kunye ne-gasket ngexesha elifanayo. Kufuneka kungabikho kuvuza. Emva koko yazisa i-test medium ukusuka kwelinye icala kwaye uphinde olu vavanyo lungentla.

②Uvavanyo lokutywinwa kwevalve yebhola elungisiweyo: Ngaphambi kovavanyo, jikelezisa ibhola izihlandlo ezininzi ngaphandle komthwalo, ivalve yebhola esisigxina ikwimeko evaliweyo, kwaye uvavanyo oluphakathi luqaliswa ukusuka kwelinye icala ukuya kwixabiso elichaziweyo; sebenzisa i-gauge ye-pressure gauge ukujonga ukusebenza kokutywinwa kwe-inlet end, kwaye usebenzise i-pressure gauge ngokuchaneka kwe-0.5 kwinqanaba le-1 kunye noluhlu lwe-1.5 amaxesha ovavanyo lovavanyo. Ngexesha elichaziweyo, ukuba akukho xinzelelo loxinzelelo, lufanelekile; emva koko yazise i-test medium ukusuka kwelinye icala kwaye uphinda olu vavanyo lungentla. Emva koko, i-valve ikwi-half-open state, zombini iziphelo zivaliwe, i-cavity yangaphakathi igcwele i-medium, kwaye ukupakisha kunye ne-gasket ihlolwe phantsi koxinzelelo lovavanyo. Kufuneka kungabikho kuvuza.

③Iivalvu zebhola ezintathu kufuneka zivavanyelwe ukutywinwa kwiindawo ezahlukeneyo.

2. Indlela yokuvavanya uxinzelelo lwevalve yokukhangela

Imeko yokuvavanya i-valve yokutshekisha: I-axis ye-disc ye-valve ye-valve yokuphakamisa i-valve ikwi-perpendicular kwi-horizontal; i-axis yetshaneli kunye ne-axis ye-disc yevalve yevalve yokujonga i-swing ikwimo emalunga nokuhambelana nomgca othe tye.

Ngethuba lovavanyo lwamandla, i-medium test medium iqaliswa ukusuka kwi-inlet end ukuya kwixabiso elichaziweyo, kwaye enye isiphelo ivaliwe. Ifanelekile ukubona ukuba akukho kuvuza kumzimba wevalvu kunye nesivalo sevalvu.

Uvavanyo lokutywina lwazisa uvavanyo oluphakathi ukusuka ekupheleni kokuphuma, kwaye ujonge indawo yokutywina kwindawo yokungena. Ukupakisha kunye ne-gasket zifanelekile ukuba akukho kuvuza.

3. Indlela yokuvavanya uxinzelelo lwevalve yokunciphisa uxinzelelo

① Uvavanyo lwamandla evalve yokunciphisa uxinzelelo ludityaniswa ngokubanzi emva kovavanyo olunye, kwaye lunokuvavanywa emva kokuhlangana. Ubude bexesha lokuvavanya amandla: 1min ye-DN<50mm; ngaphezu kwe-2min ye-DN65 ~ 150mm; ngaphezu kwe-3min ye-DN> 150mm. Emva kokuba i-bellows kunye nendibano i-welded, uvavanyo lwamandla lwenziwa ngomoya kwi-1.5 ngamaxesha oxinzelelo oluphezulu emva kwe-valve yokunciphisa uxinzelelo.

② Uvavanyo lokutywinwa lwenziwa ngokweyona ndlela yokusebenza. Xa uvavanya ngomoya okanye ngamanzi, uvavanyo lwenziwa ngamaxesha angama-1.1 uxinzelelo lwegama; xa uvavanya nge-steam, uvavanyo lwenziwa kuxinzelelo oluphezulu lokusebenza oluvunyelwe kwiqondo lokushisa elisebenzayo. Umahluko phakathi koxinzelelo lokungena kunye noxinzelelo lokuphuma kufuneka ungabi ngaphantsi kwe-0.2MPa. Indlela yokuvavanya: emva kokuba uxinzelelo lwe-inlet lusetyenzisiwe, ngokuthe ngcembe ulungelelanise i-screw yokulungelelanisa i-valve ukwenzela ukuba uxinzelelo lwe-outlet lutshintshe ngokukhawuleza kwaye ngokuqhubekayo ngaphakathi koluhlu oluphezulu kunye nexabiso elincinci, kwaye akufuneki kubekho i-stagnation okanye i-blocking. Ukunciphisa uxinzelelo lwe-steam, xa uxinzelelo lwe-inlet luhlengahlengiswa kude, i-valve yokuvala emva kwevalve ivaliwe, kwaye uxinzelelo lwe-outlet luphezulu kwaye ixabiso eliphantsi. Ngaphakathi kwemizuzu emi-2, ukunyuka koxinzelelo lwe-outlet kufuneka kuhlangabezane neemfuno zeThebhile 4.176-22. Ngexesha elifanayo, umthamo wombhobho emva kwevalve uhlangabezana neemfuno zeThebhile 4.18 ngokufanelekileyo; kumanzi kunye neevalve zokunciphisa uxinzelelo lomoya, xa uxinzelelo lwe-inlet luhlengahlengiswa kwaye uxinzelelo lwe-outlet luyi-zero, i-valve yokunciphisa uxinzelelo ivalwe uvavanyo lokutywinwa, kwaye akukho kuvuza ngaphakathi kwemizuzu emi-2 ifanelekile.

4. Indlela yokuvavanya uxinzelelo lwevalve yebhabhathane

Uvavanyo lwamandla evalve yebhabhathane yepneumatic luyafana nolo lwevalve yokumisa. Uvavanyo lokutywinwa kokusebenza kwevalve yebhabhathane kufuneka lwazise uvavanyo oluphakathi ukusuka kwinqanaba eliphakathi, ipleyiti yebhabhathane kufuneka ivulwe, enye isiphelo kufuneka ivalwe, kwaye uxinzelelo kufuneka lufakwe kwixabiso elichaziweyo; emva kokukhangela ukuba akukho kuvuza kwindawo yokupakisha kunye nezinye iindawo zokutywina, vala ipleyiti yebhabhathane, vula esinye isiphelo, kwaye ujonge ukuba akukho kuvuza kwindawo yokutywina ipleyiti yebhabhathane kwabafanelekileyo. Ivalve yebhabhathane esetyenziselwa ukulawula ukuhamba akuyomfuneko ukuba ivavanyelwe ukusebenza kokutywinwa.

5. Indlela yokuvavanya uxinzelelo lwevalve yeplagi

① Xa ivalve yeplagi ivavanyelwa amandla, indawo ephakathi yaziswa ukusuka kwelinye icala, indawo eseleyo ivaliwe, kwaye iplagi ijikeleziswa kwiindawo zokusebenza ezivuleleke ngokupheleleyo ukuze zivavanywe. Umzimba wevalvu ufanelekile ukuba akukho kuvuza kufunyenweyo.

② Ngexesha lovavanyo lokutywinwa, ivalve yeplagi ethe tye kufuneka igcine uxinzelelo kwindawo elingana naleyo ikwipaseji, jikelezisa iplagi kwindawo evaliweyo, jonga ukusuka kwelinye icala, emva koko ujikelezise iplagi 180 ° ukuphinda iplagi. uvavanyo olungentla; ivalve yeplagi yendlela ezintathu okanye ezine kufuneka igcine uxinzelelo kwicango elilingana nelinye icala lepaseji, ujikelezise iplagi kwindawo evaliweyo ngokulandelelana, yazisa uxinzelelo olusuka kwicala lasekunene, kwaye ujonge ukusuka kwindawo evaliweyo. ezinye ziphela ngaxeshanye.

Ngaphambi kokuvavanya i-valve yeplagi, kuvunyelwe ukusebenzisa umaleko we-oyile yokuthambisa engena-acidic kwindawo yokutywina. Ukuba akukho kuvuza okanye amaconsi amanzi awandisiweyo afunyenwe ngexesha elichaziweyo, lifanelekile. Ixesha lokuvavanya ivalve yeplagi ingaba mfutshane, ngokuqhelekileyo ichazwe njengemizuzu eyi-1 ukuya kwe-3 ngokwe-diameter ye-nominal.

Ivalve yeplagi yegesi kufuneka ivavanyelwe ukuxinana komoya ngamaxesha angama-1.25 oxinzelelo lokusebenza.

6. Indlela yokuvavanya uxinzelelo lweevalvu ze-diaphragm Uvavanyo lwamandla eevalve ze-diaphragm kukwazisa i-medium ukusuka nakweyiphi na isiphelo, ukuvula i-disc yevalve, kwaye uvale esinye isiphelo. Emva kokuba uxinzelelo lovavanyo luphakama kwixabiso elichaziweyo, khangela ukuba akukho kuvuza kumzimba wevalve kunye nesivalo sevalve. Emva koko unciphise uxinzelelo kuxinzelelo lovavanyo lokutywinwa, vala idiski yevalve, uvule elinye icala ukuze lihlolwe, kwaye udlule ukuba akukho kuvuza.

7. Indlela yokuvavanya uxinzelelo lwee-valve zokumisa kunye ne-throttle valves

Kuvavanyo lwamandla eevalve zokumisa kunye neevalve ze-throttle, iivalve ezidityanisiweyo zihlala zibekwe kwindawo yovavanyo loxinzelelo, i-disc yevalve ivuliwe, i-medium ifakwe kwixabiso elichaziweyo, kwaye umzimba wevalve kunye nesivalo sevalvu zijongwa ukubila kwaye ukuvuza. Uvavanyo lwamandla lunokuthi lwenziwe kwisiqwenga esinye. Uvavanyo lokutywina lwenziwa kuphela kwiivalvu zokumisa. Ngethuba lovavanyo, i-valve stem ye-valve yokumisa ikwimeko ethe nkqo, i-disc ye-valve ivuliwe, kwaye i-medium ingeniswa ukusuka ekupheleni kwe-disc ye-valve ukuya kwixabiso elichaziweyo, kwaye ukupakishwa kunye ne-gasket zihlolwe; emva kokuphumelela uvavanyo, i-disc ye-valve ivaliwe kwaye enye isiphelo ivuliwe ukujonga ukuvuza. Ukuba zombini i-valve amandla kunye neemvavanyo zokutywinwa kufuneka zenziwe, uvavanyo lwamandla lunokwenziwa kuqala, kwaye ke uxinzelelo lunokuncitshiswa kwixabiso elichaziweyo lovavanyo lokutywinwa, kwaye ukupakishwa kunye ne-gasket kunokujongwa; emva koko idiski yevalve inokuvalwa kwaye isiphelo sokuphuma singavulwa ukujonga ukuba indawo yokutywina iyavuza.