Iivelufa butterflyyaqanjwa eUnited States ngeminyaka yee-1930. Yaziswa eJapan ngeminyaka yoo-1950 kwaye ayizange isetyenziswe kakhulu eJapan de kwaba ngoo-1960. Ayizange yaziwe kwilizwe lam de kwangoo-1970. Iimpawu eziphambili ze-butterfly valves zi: i-torque encinci yokusebenza, indawo encinci yokufakela kunye nobunzima obulula. Ukuthatha i-DN1000 njengomzekelo, iivelufa butterflyimalunga ne-2T, ngelixa iivalve yesangoimalunga ne-3.5T. Iivelufa butterflykulula ukudibanisa nezixhobo ezahlukeneyo zokuqhuba kwaye inokuqina okuhle kunye nokuthembeka. Ukungalungi kwee-valve ze-butterfly ezivaliweyo zerubha kukuba xa zisetyenziselwa ukubetha, i-cavitation iya kwenzeka ngenxa yokusetyenziswa okungafanelekanga, okubangela ukuba isihlalo se-rubber sihlambuluke kwaye sonakaliswe. Ngoko ke, indlela yokukhetha ngokuchanekileyo kuxhomekeke kwiimeko zokusebenza. Ubudlelwane phakathi kokuvulwa kwevalve yebhabhathane kunye nesantya sokuhamba ngokusisiseko kumgca. Ukuba isetyenziselwa ukulawula izinga lokuhamba, iimpawu zayo zokuhamba nazo zihambelana ngokusondeleyo nokumelana nokuhamba kombhobho. Umzekelo, ukuba inqanaba levalve kunye nemo yeemibhobho ezimbini ziyafana, kodwa i-coefficient yokulahlekelwa kombhobho yahlukile, isantya sokuhamba kwevalve nayo iya kwahluka kakhulu. Ukuba i-valve ikwimo ye-throttling amplitude enkulu, i-cavitation ijwayele ukwenzeka ngasemva kweplate yevalve, enokuthi yonakalise i-valve. Ngokuqhelekileyo isetyenziswa ngaphandle kwe-15 °. Xa iivelufa butterflyikwindawo yokuvula ephakathi, imilo yokuvula eyenziwe ngumzimba wevalvu kunye nesiphelo sangaphambili sepleyiti yebhabhathane igxile kwi-valve shaft, kwaye imimandla eyahlukeneyo yenziwa macala omabini. Umphambili wepleyiti yebhabhathane kwelinye icala uhamba kwicala lokuhamba kwamanzi, kwaye elinye icala liya kwicala lokuhamba kwamanzi. Ngoko ke, umzimba wevalve kunye nepleyiti yevalve kwelinye icala yenza i-nozzle-shape yokuvula, kwaye elinye icala lifana nokuvuleka okumise okwe-throttle. Icala lombhobho linesantya esikhawulezayo sokuqukuqela kunecala le-throttle, kwaye uxinzelelo olubi luya kuveliswa phantsi kwevalve kwicala le-throttle, kwaye i-rubber seal iya kuwa rhoqo. Itorque yokusebenza yeivelufa butterflyiyahluka ngenxa yokuvuleka okuhlukeneyo kunye nokuvula kunye nokuvala i-valve. I-torque eveliswa ngumahluko phakathi kweentloko zamanzi aphezulu nangaphantsi kwe-valve ye-butterfly ethe tye, ngakumbi i-valve-diameter enkulu, ngenxa yobunzulu bamanzi, ayinakuhoywa. Ukongezelela, xa i-elbow ifakwe kwicala lokungena kwi-valve, ukuhamba kwe-bias kwenziwa, kwaye i-torque iya kwanda. Xa i-valve iphakathi kokuvula, indlela yokusebenza kufuneka izivalele ngenxa yesenzo se-torque yamanzi.
I-China inamatyathanga amaninzi oshishino lwevalvu, kodwa ayingombane wevalvu. Ngokubanzi, ilizwe lam lingene kuluhlu lwamandla evalvu yehlabathi, kodwa ngokomgangatho wemveliso, ilizwe lam lisekude ekubeni ligunya levalvu. Ushishino lusenoxinzelelo oluphantsi lwemveliso, izakhono eziphantsi ze-R&D zeevalvu ezihambelana nemveliso ephezulu, kunye nenqanaba lobugcisa bokwenza eliphantsi kushishino lwevalvu, kunye nentsilelo yorhwebo yokungenisa nokuthumela ngaphandle iyaqhubeka ukwanda. Ngokuqinisekileyo azikho iinkampani ezininzi zevalvu ezinokuphila ngokwenene kwimarike. Nangona kunjalo, oku kutshitshiswa kwesantya esiphezulu kwishishini le-valve kuya kuzisa amathuba amakhulu, kwaye umphumo womothuko uya kwenza ukuba umsebenzi wemarike ube nengqiqo ngakumbi. Indlela eya ekuhlaleni kweevalve eziphezulu kakhulu "i-bumpy". Amacandelo asisiseko aye asisiphene esithintela uphuhliso lweshishini lemveliso yelizwe lam kwinqanaba eliphezulu. Ngexesha le-12 leSicwangciso seMinyaka emiHlanu, urhulumente uya kuqhubeka nokwandisa ukwenziwa kwezixhobo zezixhobo ezikumgangatho ophezulu. Apha sikhetha uphuhliso oluninzi olungundoqo “kwiSicwangciso soPhumezo” kunye namashishini amele iivalvu ukuze kuhlalutywe ukuba nokwenzeka kotshintsho. Ukusuka kuhlalutyo, kunokubonwa ukuba ukwenzeka kokungeniswa endaweni yeevalvu kumashishini amancinci ahlukeneyo ahluka kakhulu, kwaye iivalvu eziphezulu zifuna ngokukhawuleza isikhokelo somgaqo-nkqubo kunye nenkxaso yophando lwezenzululwazi.
Ushishino lwevalvu ludlala indima ebaluleke kakhulu njengekhonkco elibalulekileyo kushishino lokwenziwa kwezixhobo kuphuhliso loqoqosho lwesizwe. Ekubeni inqanaba loshishino lwelizwe lam lokwenziwa kweevalvu zasekhaya lisekude nomgama othile ukusuka kwinqanaba eliphambili lamazwe ngamazwe, izitshixo ezininziiivalvekunye neeparitha eziphezulu, ubushushu obuphezulu kunye noxinzelelo oluphezulu, kunye nezinga eliphezulu leeponti lihlala lixhomekeke kwizinto ezithunyelwa ngaphandle. Ngokomzekelo, uphawu lwaseYurophu lwe-OMAL luhlala lulolona khetho luphambili kwishishini le-valve yasekhaya. Ukuze kukhuthazwe ukwenziwa kweevalvu kwindawo, emva kokuba iBhunga likaRhulumente likhuphe "Iimbono ezininzi malunga nokuKhawuleza ukuVuselelwa kweZixhobo zoMveliso weZixhobo", amasebe aseburhulumenteni afanelekileyo enze uluhlu lwemisebenzi emikhulu ngokuhambelana neemfuno zorhulumente zokwenziwa kwendawo. izixhobo ezinkulu. Ikhokelwa yiKomishoni yoPhuhliso kunye noHlaziyo lweSizwe, i-China Machinery Industry Federation kunye ne-China General Machinery Industry Association baye basasaza kwaye baqulunqa aivalveisicwangciso sendawo yezixhobo eziphambili kwiinkalo ezinxulumeneyo, kwaye ziye zaququzelela amasebe afanelekileyo amaxesha amaninzi. Ngoku ukwakhiwa kweevalvu kwenze isivumelwano kwishishini levalvu yasekhaya. Yamkela imigangatho yamazwe ngamazwe yoyilo lwemveliso; ukufunxa ubume boyilo obugqwesileyo bangaphandle (kubandakanywa nobuchwepheshe obunelungelo elilodwa lomenzi wechiza); uvavanyo lwemveliso kunye nokuhlolwa komsebenzi kwenziwa ngokungqongqo ngokuhambelana nemigangatho yamazwe ngamazwe; ukufunxa amava enkqubo yemveliso yangaphandle kwaye uncamathisele ukubaluleka kuphando kunye nokukhuthazwa kwezinto ezintsha; ukucacisa iiparitha zobugcisa kunye neemeko zokusebenza zemveliso ye-valve ephezulu yeparameter ephuma kumazwe angaphandle, njl.njl iindlela zokukhawulezisa inkqubo yendawo, ukukhuthaza ukuhlaziywa okuqhubekayo kweemveliso zevalve, kunye nokuqonda ngokupheleleyo indawo ye-valve. Ngokukhawuleza kwesantya sohlengahlengiso kushishino lwevalvu, ishishini lekamva liya kuba lukhuphiswano phakathi komgangatho wemveliso yesivalo kunye nokhuseleko kunye neempawu zemveliso. Iimveliso ziya kukhula kwicala letekhnoloji ephezulu, iiparamitha eziphakamileyo, ukuxhathisa okuqinileyo kwe-corrosion, kunye nobomi obude. Kuphela ngokuqhubeka ngokutsha kweteknoloji, uphuhliso lweemveliso ezintsha, kunye nokuguqulwa kweteknoloji apho umgangatho wethekhinoloji yemveliso unokuphuculwa ngokuthe ngcembe ukuze uhlangabezane nesixhobo sasekhaya esihambelanayo kunye nokuqonda ngokupheleleyo ukwenziwa kweevalvu. Phantsi kobume bemfuno enkulu, ishishini lokuvelisa izivalo zelizwe lam ngokuqinisekileyo liya kubonisa amathuba angcono ophuhliso.
Ixesha lokuposa: Nov-02-2024
