Asebenza kanjani ama-butterfly valves?

Butterfly valveiwuhlobo lwevalvu esebenzisa ingxenye yokuvula nokuvala idiski ukuze ibuyisele cishe u-90° ukuze ivule, ivale noma ilungise izinga lokugeleza kwendawo ephakathi. I-Butterfly valve ayinayo nje isakhiwo esilula, usayizi omncane, isisindo esincane, ukusetshenziswa kwezinto eziphansi, usayizi omncane wokufaka, i-torque encane yokushayela, ukusebenza okulula nokushesha, kodwa futhi inomsebenzi omuhle wokulawula ukugeleza kanye nezici zokuvala zokuvala, futhi ingenye yezinto ezikhula ngokushesha. izinhlobo zama-valve eminyakeni eyishumi edlule. Ama-valve ovemvane asetshenziswa kakhulu. Izinhlobonhlobo kanye nenani lokusetshenziswa kwayo kuyaqhubeka nokukhula, futhi kuthuthuke kumazinga okushisa aphezulu, ukucindezela okukhulu, ububanzi obukhulu, ukuqina okuphezulu, impilo ende, izici ezinhle kakhulu zokulawula, kanye nokusebenza okuningi kwe-valve eyodwa. Ukuthembeka kwayo nezinye izinkomba zokusebenza sezifinyelele izinga eliphezulu.

Ngokusetshenziswa kwerabha yokwenziwa engamelana namakhemikhali ukuzeizivalo uvemvane, ukusebenza kweizivalo uvemvaneisithuthukisiwe. Ngoba irabha yokwenziwa inezici zokumelana nokugqwala, ukumelana nokuguguleka, ukuzinza kobukhulu, ukuqina okuhle, ukubunjwa okulula, izindleko eziphansi, njll., irabha yokwenziwa enezakhiwo ezahlukene ingakhethwa ngokwezidingo ezahlukene zokusebenzisa ukuhlangabezana nezimo zokusebenzaizivalo uvemvane.

Ngoba i-polytetrafluoroethylene (PTFE) inokumelana nokugqwala okuqinile, ukusebenza okuzinzile, akulula ukuguga, i-coefficient ephansi yokungqubuzana, ukwakha kalula, ukuzinza kwe-dimensional, futhi ingathuthukisa izici zayo eziphelele ngokugcwalisa nokwengeza izinto ezifanele, i-butterfly valve sealing material engcono kakhulu. amandla kanye ne-coefficient ephansi ye-friction ingatholakala, futhi ukulinganiselwa kwerabha yokwenziwa kuyanqotshwa, ngakho-ke impahla ye-polymer polymeric emelwe yi-PTFE kanye nezinto zayo eziguquliwe zokugcwalisa zisetshenziswe kabanzi ku-valve uvemvane, ukuze ukusebenza kwe-valve uvemvane ithuthuke ngokwengeziwe.Ama-valve e-Butterflyngobubanzi obubanzi bamazinga okushisa nezingcindezi, ukusebenza okuthembekile kokubeka uphawu nempilo ende yesevisi yenziwe.

Ukuze kuhlangatshezwane nezidingo zezicelo zezimboni ezifana nokushisa okuphezulu nokuphansi, ukuguguleka okuqinile, nokuphila isikhathi eside, ama-valve ovemvane ophawu lwensimbi athuthukiswe kakhulu. Ngokusetshenziswa kokumelana nokushisa okuphezulu, ukumelana nokushisa okuphansi, ukumelana nokugqwala okuqinile, ukumelana nokuguguleka okuqinile, kanye nezinto ezisetshenziswayo ezinamandla amakhulu kuma-valve uvemvane, ama-valve uvemvane avaliwe ensimbi asetshenziswe kabanzi emikhakheni yezimboni efana nokushisa okuphezulu nokuphansi, ukuguguleka okuqinile. , nempilo ende, nama-butterfly valves ane-diameter enkulu (9 ~ 750mm), ukucindezela okuphezulu (42.0MPa) kanye nobubanzi bokushisa okubanzi (-196 ~ 606 ° C) kuvele, ukuze ubuchwepheshe bama-butterfly valve bufinyelele izinga elisha. .

Lapho i-valve ye-butterfly ivuliwe ngokugcwele, inokumelana nokugeleza okuncane. Uma ukuvulwa kuphakathi kuka-15 ° ~ 70 °, kungasetshenziswa ukulawula ukugeleza okubucayi, ngakho-ke ukusetshenziswa kwe-valve butterfly kuvame kakhulu emkhakheni wokulungiswa kobubanzi obukhulu.

Ngenxa yokunyakaza okusulekayo kwepuleti uvemvane uvemvane, amavalvu ovemvane amaningi angasetshenziselwa imidiya enezinto eziqinile ezimisiwe. Ngokuya ngamandla esigxivizo, ingabuye isetshenziselwe imidiya eyimpuphu kanye ne-granular.

Ama-valve e-butterfly afanele ukulawulwa kokugeleza. Ngenxa yokuthi ukuncipha kwengcindezi ye-valve uvemvane epayipini kukhulu, cishe izikhathi ezintathu kune-valve yesango, lapho kukhethwa i-valve uvemvane, ithonya lokulahlekelwa kwengcindezi yesistimu yepayipi kufanele licatshangelwe ngokugcwele, kanye namandla ipuleti butterfly ukuthwala ingcindezi medium iphayiphi lapho ivaliwe kufanele kucatshangelwe. Ukwengeza, imikhawulo yezinga lokushisa lokusebenza lapho impahla yesihlalo se-elastomeric ingafakwa ngaphansi kwamazinga okushisa aphezulu kufanele futhi inakwe.

I-valve uvemvane inobude obuncane bokwakha kanye nobude bubonke, isivinini sokuvula nokuvala ngokushesha, nezici ezinhle zokulawula uketshezi. Isimiso sesakhiwo samavalve emvemvane sifaneleka kakhulu ekwenzeni ama-valve amakhulu. Lapho i-valve uvemvane kudingeka ukuba isetshenziselwe ukulawula izinga lokugeleza, kubalulekile ukukhetha usayizi olungile kanye nohlobo lwe-valve uvemvane ukuze lusebenze kahle nangempumelelo.

Ngokuvamile, ku-throttling, ukulawulwa kokulawula kanye nodaka, ubude besakhiwo bufushane, isivinini sokuvula nokuvala siyashesha, futhi ukunqanyulwa kwengcindezi ephansi (umehluko omncane wengcindezi) kuyadingeka, futhi i-valve butterfly iyanconywa. Ama-valve e-Butterfly angasetshenziswa uma kunokulungiswa kwezindawo ezimbili, isiteshi esincishisiwe sobubanzi, umsindo ophansi, i-cavitation kanye ne-vaporization, inani elincane lokuvuza emkhathini, kanye nemidiya ehlukumezayo. Ngaphansi kwezimo ezikhethekile zokusebenza, ukulungiswa kwe-throttling, noma ukuvalwa okuqinile, ukuguga okukhulu, izinga lokushisa eliphansi (cryogenic) nezinye izimo zokusebenza.