Xa usebenzisa ivalvu, kukho iingxaki eziphazamisayo rhoqo, kuquka nokuba ivalvu ayivalwanga yonke indlela. Ndingenza ntoni? Ivalvu yokulawula inemithombo eyahlukeneyo yokuvuza kwangaphakathi ngenxa yohlobo lwesakhiwo sayo esintsonkothileyo sevalvu. Namhlanje, siza kuxoxa ngeendlela ezisixhenxe ezahlukeneyo zokuvuza kwevalvu yokulawula kwangaphakathi kunye nohlalutyo kunye nokulungiswa kwento nganye.

1. Ivalvu ayivalwanga ngokupheleleyo kwaye ukuseta indawo ye-actuator ye-zero akuchanekanga.

Isisombululo:

1) Vala ivalvu ngesandla (qiniseka ukuba ivaliwe ngokupheleleyo);

2) Phinda uvule ivalvu ngesandla, ukuba amandla amancinci awanakusetyenziselwa ukuyijika;

3) Jika ivalvu ijika isiqingatha kwicala elichaseneyo;

4) Okulandelayo, tshintsha umda ophezulu.

2. Ukutyhala kwe-actuator akwanelanga.

Ukutyhala kwe-actuator akwanelanga kuba ivalvu yeyohlobo lokuvala olutyhalelwa phantsi. Xa kungekho xinzelelo, kulula ukufikelela kwindawo evaliweyo ngokupheleleyo, kodwa xa kukho uxinzelelo, ukunyuka kolwelo akunakuthintelwa, okwenza kube nzima ukuvala ngokupheleleyo.

Isisombululo: tshintsha i-actuator enamandla aphezulu, okanye utshintshele kwi-spool elinganiselayo ukuze unciphise amandla angalinganiyo e-medium

3. Ukuvuza kwangaphakathi okubangelwa kumgangatho ophantsi wokwakhiwa kwevalvu yokulawula umbane

Ngenxa yokuba abavelisi beevalvu abazilawuli ngokungqongqo izinto zeevalvu, iteknoloji yokucubungula, iteknoloji yokuhlanganisa, njl. ngexesha lenkqubo yokuvelisa, umphezulu wokuvala awugayiwa kumgangatho ophezulu kwaye iziphene ezifana ne-pitting kunye ne-trachoma azisuswanga ngokupheleleyo, nto leyo ekhokelela ekuvuzeni kwangaphakathi kwevalvu yokulawula yombane.

Isisombululo: Phinda usebenzise umphezulu wokuvala

4. Inxalenye yolawulo yevalvu yokulawula yombane inefuthe ekuvuzeni kwangaphakathi kwevalvu.

Iindlela zokulawula oomatshini, kuquka ii-valve limit switches kunye nee-over torque switches, yindlela yendabuko yokusebenzisa i-electric control valve. Indawo ye-valve ayichanekanga, i-spring igugile, kwaye i-coefficient of thermal expansion ayilingani kuba ezi zinto zolawulo zichaphazeleka bubushushu obujikelezileyo, uxinzelelo, kunye nomswakama. kunye nezinye iimeko zangaphandle, ezibangela ukuvuza kwangaphakathi kwe-electric control valve.

Isisombululo: lungisa umda.

5. Ukuvuza kwangaphakathi okubangelwa ziingxaki zokusombulula iingxaki zevalvu yokulawula yombane

Kuqhelekile ukuba iivalvu zolawulo lombane zingavuli emva kokuba zivalwe ngesandla, nto leyo ebangelwa ziinkqubo zokucubungula nokuhlanganisa. Indawo yokusebenza kweeswitshi eziphezulu nezisezantsi ingasetyenziselwa ukulungisa ukubetheka kwevalvu yolawulo lombane. Ukuba ukubetheka kulungiswe kancinci, ivalvu yokulawula yombane ayivaleki kakuhle okanye ivuleke; ukuba ukubetheka kulungiswe kakhulu, kuya kubangela ukuba indlela yokukhusela yeswitshi ye-torque igqithise kakhulu;

Ukuba ixabiso lesenzo leswitshi esisebenza nge-over-torque linyusiwe, kuya kubakho ingozi enokwenzakalisa ivalvu okanye indlela yokudlulisa umbane, okanye itshise injini. Ngokwesiqhelo, emva kokuba ivalvu yokulawula yombane ilungisiwe, indawo yokutshintsha umda osezantsi yocango lombane imiselwa ngokushukumisa ngesandla ivalvu yokulawula yombane iye ezantsi, kulandele ukuyishukumisa kwicala lokuvula, kwaye umda ophezulu umiselwa ngokushukumisa ngesandla ivalvu yokulawula yombane iye kwindawo evulekileyo ngokupheleleyo.

Ngoko ke, ivalvu yokulawula umbane ayizukuthintela ekuvulekeni emva kokuba ivalwe ngokuqinileyo ngesandla, nto leyo evumela ucango lombane ukuba luvuleke kwaye luvaleke ngokukhululekileyo, kodwa ngokuyintloko kuya kubangela ukuvuza kwangaphakathi kocango lombane. Nokuba ivalvu yokulawula umbane imiselwe ngokugqibeleleyo, ekubeni indawo yokusebenza yeswitshi yomda izinzile kakhulu, i-medium eyilawulayo iya kuhlamba kwaye inxibe ivalvu rhoqo ngelixa isetyenziswa, nto leyo eya kubangela ukuvuza kwangaphakathi ngenxa yokuvalwa kwevalvu okungelulanga.

Isisombululo: lungisa umda.

6. Ukuvuza kwe-Cavitation Ukuvuza kwangaphakathi kwevalvu yokulawula umbane kubangelwa kukugqwala kwevalvu okubangelwa kukukhetha uhlobo olungachanekanga.

Ukwahlukana kwe-cavitation kunye noxinzelelo kuqhagamshelwe. Ukwahlukana kwe-cavitation kuya kwenzeka ukuba umahluko woxinzelelo lwe-P wevalvu uphezulu kunomahluko woxinzelelo obalulekileyo we-Pc kwi-cavitation. Inani elikhulu lamandla lenziwa ngexesha lenkqubo ye-cavitation xa i-bubble iqhuma, nto leyo echaphazela isihlalo sevalvu kunye ne-valve core. Ivalvu eqhelekileyo isebenza kwiimeko ze-cavitation kangangeenyanga ezintathu okanye ngaphantsi, oko kuthetha ukuba ivalvu inengxaki yokubola kwe-cavitation enzima, okubangela ukuvuza kwesihlalo sevalvu ukuya kuthi ga kwi-30% yokuhamba okulinganiselweyo. Izinto ezibangela ukuxinana kwe-throttling zinefuthe elibi lokutshabalalisa. Lo monakalo awunakulungiswa.

Ngoko ke, iimfuno zobugcisa ezithile zeevalvu zombane ziyahluka ngokuxhomekeke kwindlela ezisetyenziselwa ngayo. Kubalulekile ukukhetha iivalvu zolawulo lombane ngobuchule ngokuhambelana nenkqubo yenkqubo.

Isisombululo: Ukuze uphucule inkqubo, khetha ivalvu yokulawula inyathelo eliya ezantsi okanye enemikhono emininzi.

7. Ukuvuza kwangaphakathi okubangelwa kukuwohloka okuphakathi kunye nokuguga kwevalvu yokulawula yombane

Emva kokuba ivalvu yokulawula yombane ilungisiwe, emva kokusebenza okuningana, ivalvu yokulawula yombane iya kuvalwa kuba ukubetha kwayo kukhulu kakhulu ngenxa yokuqhekeka kwevalvu, ukubola okuphakathi, ukuguga kwesiseko sevalvu kunye nesihlalo, kunye nokuguga kwezinto zangaphakathi. Ukwanda kokuvuza kwevalvu yokulawula yombane kungenxa yeziganeko zokungakhululeki. Ukuvuza kwangaphakathi kwevalvu yokulawula yombane kuya kuba kubi ngakumbi ngokuhamba kwexesha.

Isisombululo: lungisa i-actuator kwaye wenze ulondolozo kunye nokulinganisa rhoqo.