Xa usebenzisa ivalve, kuhlala kukho imiba ecaphukisayo, kubandakanywa ivalve ayivalwanga yonke indlela.Ndingenza ntoni?Ivalve yolawulo ineentlobo ngeentlobo zemithombo yokuvuza yangaphakathi ngenxa yohlobo lwayo lwesakhiwo sevalvu entsonkothileyo.Namhlanje, siza kuxoxa ngeendlela ezisixhenxe ezahlukeneyo zokuvuza kwevalvu yolawulo lwangaphakathi kunye nohlalutyo kunye nolungiso ngalunye.

1. Ivalve ayivalwanga ngokupheleleyo kwaye isicwangciso sendawo ye-activator asichanekanga.

Isisombululo:

1) Vala ivalve ngesandla (qinisekisa ukuba ivalwe ngokupheleleyo);

2) Phinda uvule ivalve ngesandla, ngaphandle kokuba amandla amancinci angenakusetyenziswa ukuyijika;

3) Jika ivalve ngesiqingatha ukujika kwicala elichaseneyo;

4) Emva koko, tshintsha umda ophezulu.

2. Ukutyhala kwe-activayitha akwanelanga.

Ukutyhala kwe-actuator ayonelanga kuba ivalve yeyohlobo lokutyhalela phantsi oluvalayo.Xa kungekho xinzelelo, kulula ukufikelela kwindawo evaliweyo ngokupheleleyo, kodwa xa kukho uxinzelelo, ukunyuka kwamanzi okunyukayo akukwazi ukubalwa, okwenza kube nzima ukuvala ngokupheleleyo.

Isisombululo: buyisela i-actuator ye-high-thrust actuator, okanye utshintshe kwi-spool elinganayo ukunciphisa amandla angalinganiyo ophakathi.

3. Ukuvuza kwangaphakathi okuziswe bubunjani bolwakhiwo lwevalvu yokulawula umbane

Ngenxa yokuba abavelisi bevalve bengazilawuli ngokungqongqo izinto zevalve, iteknoloji yokucubungula, iteknoloji yendibano, njl.njl. ngexesha lenkqubo yokuvelisa, indawo yokutywina ayibekwanga kumgangatho ophezulu kwaye iziphene ezifana ne-pitting kunye ne-trachoma azisuswanga ngokupheleleyo, okukhokelela ekuvuzeni kwangaphakathi. ivalve yokulawula umbane.

Isisombululo: Sungula kwakhona umphezulu wokutywina

4. Inxalenye yolawulo yevalve yombane inefuthe ekuvuzeni kwangaphakathi kwevalve.

Iindlela zokulawula oomatshini, kubandakanywa ukutshintshela umda wevalve kunye nokutshintsha kwetorque ngaphezulu, yindlela eqhelekileyo yokusebenzisa ivalve yokulawula umbane.Indawo yevalve ayichanekanga, intwasahlobo igugile, kwaye i-coefficient yokwandiswa kwe-thermal ayilingani kuba ezi zinto zolawulo zichatshazelwa bubushushu obujikelezileyo, uxinzelelo, kunye nokufuma.kunye nezinye iimeko zangaphandle, ezibangela ukuvuza kwangaphakathi kwevalve yokulawula umbane.

Isisombululo: lungisa umda.

5. Ukuvuza kwangaphakathi okuziswe yimiba yokulungisa ingxaki yevalve yolawulo lombane

Kuqhelekile ukuba iivalve zokulawula umbane zingaphumeleli ukuvula emva kokuvalwa ngesandla, okubangelwa yinkqubo yokucubungula kunye nendibano.Isikhundla sesenzo sokutshintsha komda ophezulu kunye nosezantsi singasetyenziselwa ukulungelelanisa ukubetha kwevalve yokulawula umbane.Ukuba i-stroke ilungiswa encinci, i-valve yokulawula umbane ayiyi kuvala ngokuqinileyo okanye ivule;ukuba i-stroke ilungelelanisiwe ibe nkulu, iya kubangela ngokugqithiseleyo indlela yokukhusela i-torque switch;

Ukuba ixabiso lesenzo sokutshintsha kwetorque ngaphezulu linyukile, kuya kubakho ingozi enokwenzakalisa ivalve okanye indlela yokuhambisa yokunciphisa, okanye itshise imoto.Ngokuqhelekileyo, emva kokuba i-valve yokulawula umbane ihlanjululwe, umda osezantsi wokutshintsha indawo yomnyango wombane ubekwe ngokugubha ngesandla i-valve yokulawula umbane ukuya ezantsi, elandelwa ngokuyishukumisa kwicala lokuvula, kwaye umda ophezulu ubekwe ngesandla. ukushukumisa ivalve yolawulo yombane kwindawo evuleke ngokupheleleyo.

Ngaloo ndlela, ivalve yokulawula umbane ayiyi kuthintelwa ekuvulekeni emva kokuba ivalwe ngokuqinileyo ngesandla, ukuvumela umnyango wombane ukuba uvule kwaye uvale ngokukhululekileyo, kodwa ngokuqinisekileyo kuya kubangela ukuvuza kwangaphakathi kocango lombane.Nokuba ivalve yombane isetwe ngokugqibeleleyo, kuba indawo yokutshintsha komda igxininiswe ubukhulu becala, isiphakathi esisilawulayo siya kusoloko sihlamba kwaye sinxibe ivalve ngelixa sisebenza, okuya kuthi kwakhona kubangele ukuvuza kwangaphakathi ukusuka ekuvalelekeni kwevalve.

Isisombululo: lungisa umda.

6. I-Cavitation Ukuvuza kwangaphakathi kwevalve yokulawula umbane kubangelwa ukubola kwevalve eziswa kukukhethwa kohlobo olungalunganga.

I-Cavitation kunye nokwahlukana koxinzelelo kuxhunyiwe.I-Cavitation iya kwenzeka ukuba umahluko wangempela we-P we-valve uphezulu kunomahluko obalulekileyo woxinzelelo lwe-Pc ye-cavitation.Umthamo omkhulu wamandla uveliswa ngexesha lenkqubo ye-cavitation xa i-bubble iqhuma, enempembelelo kwisihlalo se-valve kunye ne-core valve.I-valve jikelele isebenza kwiimeko ze-cavitation kwiinyanga ezintathu okanye ngaphantsi, oku kuthetha ukuba i-valve ihlupheke kwi-corrosion ye-cavitation enzima, okubangelwa ukuvuza kwesihlalo se-valve ukuya kwi-30% ye-flow flow rated.Amalungu e-throttling anempembelelo enkulu eyonakalisayo.Lo monakalo awunakulungiswa.

Ngoko ke, iimfuno ezithile zobugcisa kwiivalve zombane ziyahluka ngokuxhomekeke ekusetyenzisweni kwazo.Kubalulekile ukukhetha iivalvu zombane ngobukrelekrele ngokuhambelana nenkqubo yenkqubo.

Isisombululo: Ukuphucula inkqubo, khetha i-multi-stage step-down or sleeve regulating valve.

7. Ukuvuza kwangaphakathi okubangelwa kukuwohloka okuphakathi kunye nokuguga kwevalve yokulawula umbane

Emva kokuba i-valve yokulawula umbane ihlengahlengiswe, emva komlinganiselo othile wokusebenza, i-valve yokulawula umbane iya kuvalwa ngenxa yokuba i-stroke inkulu kakhulu ngenxa ye-valve cavitating, i-medium eroding, i-valve core kunye nesihlalo esigugileyo, kwaye ukuguga kwamalungu angaphakathi.Ukonyuka kokuvuza kwevalve yokulawula umbane sisiphumo sokuyekelela kwezinto.Ukuvuza kwangaphakathi kwevalve yolawulo lombane kuya kuba mbi ngakumbi ngokuhamba kwexesha.

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