Siyakwamukela ku-Thomas Insights-nsuku zonke, sizokhipha izindaba zakamuva nokuhlaziya ukuze sigcine abafundi bethu benolwazi lwakamuva ngamathrendi embonini. Bhalisa lapha ukuze uthumele izihloko zezindaba zosuku ngokuqondile ebhokisini lakho lokungenayo.
I-steam ekhiqizwa ama-boilers amanzi ashisayo isetshenziswa kabanzi emisebenzini yezimboni. Izinqubo zezimboni ezifana nokomisa, umsebenzi wemishini, ukukhiqiza amandla kanye nokushisisa inqubo yizinto ezijwayelekile zokufaka isitimu. I-valve yesitimu isetshenziselwa ukunciphisa umfutho we-steam yokungena kanye nokulungisa kahle kanye nokulawula isitimu nezinga lokushisa okunikezwa kulezi zinqubo.
Ngokungafani nolunye uketshezi oluningi lwezinqubo zezimboni, umusi unezici ezithile, okwenza kube nzima ukuwulawula ngamavalvu. Lezi zici zingaba ivolumu yayo ephezulu kanye nezinga lokushisa kanye nomthamo wayo wokujiya, onganciphisa ngokushesha ivolumu izikhathi ezingaphezu kwenkulungwane. Uma usebenzisa i-valve njengethuluzi lokulawula inqubo, kunokucatshangelwa okuningi lapho usebenzisa umusi.
Okulandelayo amaphutha angu-7 abucayi kakhulu ekufakweni kwamavalvu okungafanele uwenze lapho usebenzisa isitimu. Lolu hlu aluzifaki zonke izinyathelo zokuphepha zokulawula i-valve yesitimu. Ichaza imisebenzi evamile evamise ukuholela ekulimaleni noma ezimeni ezingaphephile lapho izama ukulawula isitimu.
Wonke umuntu uyazi ukuthi isitimu sizoncipha, kodwa lapho kuxoxwa ngenqubo yokulawulwa kwamapayipi omusi, lesi sici esisobala se-steam sivame ukukhohlwa. Abantu abaningi bacabanga ukuthi umugqa wokukhiqiza uhlale usezingeni eliphezulu lokushisa kanye nesimo segesi, futhi i-valve yenzelwe lokhu.
Nokho, ulayini we-steam awuhlali njalo ugijima, ngakho uzophola futhi ujiye. Futhi ukufingqa kuhambisana nokuncipha okukhulu kwevolumu. Nakuba izicupho zesitimu zisiphatha ngokuphumelelayo isitimu esijiyile, ukusebenza kwevalvu entanjeni yesitimu kufanele kuklanywe ukwelapha amanzi awuketshezi, ngokuvamile okuyingxube yoketshezi negesi.
Lapho isitimu siphoqa amanzi angenakucindezelwa ukuthi asheshise ngokuzumayo futhi avinjwe ama-valve noma izinsimbi, isando samanzi sizokwenzeka kumapayipi esitimu. Amanzi angahamba ngesivinini esiphezulu, abangele umsindo nokunyakaza kwamapayipi ezimeni ezincane, noma ukuqhuma ezimweni ezimbi kakhulu, abangele ukulimala kwamapayipi noma izinto zokusebenza. Lapho usebenza ngesitimu, i-valve epayipini lenqubo kufanele ivuleke noma ivalwe kancane ukuze kuvinjelwe ukuqhuma okungazelelwe koketshezi.
Ama-valve aklanyelwe ukusetshenziswa kwe-steam kufanele asebenze ngaphansi kwezimo zokuklama zokucindezela kanye nezinga lokushisa. I-steam ikhula ngokushesha ibe yivolumu enkulu. Ukwenyuka kwezinga lokushisa okungu-20 K kuzophinda kabili ukucindezela ku-valve, okungenzeka ukuthi akuklanyelwe ukucindezela okunjalo. I-valve kumele yakhelwe isimo esibi kakhulu (ingcindezi ephezulu kanye nezinga lokushisa) ohlelweni.
Iphutha elivamile ekucacisweni kwe-valve nokukhetha uhlobo olungalungile lwe-valve yokufakwa kwesitimu. Izinhlobo eziningi zama-valve zingasetshenziswa ekufakweni kwesitimu. Nokho, zinikeza imisebenzi nezilawuli ezahlukene. Ama-valve ebhola noma ama-valve esango ahlinzeka ngokulawula ukugeleza okunembayo, okufinyeleleka kakhulu kunamavalve ovemvane. Ngenxa yezinga lokugeleza elikhulu, lo mehluko ubalulekile ekusetshenzisweni kwesitimu. Ezinye izinhlobo zama-valve ezivamile ekufakweni kwesitimu ama-valve esango nama-diaphragm valves.
Iphutha elifanayo ekukhetheni uhlobo lwe-valve ukukhetha kohlobo lwe-actuator. I-actuator isetshenziselwa ukuvula nokuvala i-valve ukude. Nakuba i-actuator yokuvula/ukuvala ingase yanele kwezinye izinhlelo zokusebenza, izinhlelo zokusebenza eziningi zesitimu zidinga ukulungiswa kwe-actuator ukuze ilawule ngokunembile ingcindezi, izinga lokushisa, nevolumu.
Ngaphambi kokukhetha i-valve yokufakwa kwesitimu, thatha isikhathi ukulinganisa ukwehla kokucindezela okulindelekile ku-valve. I-valve engu-1.25-intshi inganciphisa ukucindezela komfula kusuka ku-145 psi kuya ku-72.5 psi, kuyilapho i-valve engu-2-intshi emfudlaneni ofanayo wenqubo izonciphisa ukucindezela komfula okungu-145 psi ku-137.7 psi kuphela.
Nakuba ukusebenzisa ama-valve amancane kubiza futhi kulinga, ikakhulukazi uma anele, ngeshwa ajwayele ukuba nomsindo. Zihlobene futhi nokudlidliza okunciphisa ukuphila kwama-valve nokufakwa kwamapayipi. Cabangela i-valve enkulu kunaleyo edingekayo ukuze ulawule umsindo nokudlidliza. I-valve yesitimu nayo inesisetshenziswa esikhethekile sokunciphisa umsindo.
Elinye iphutha ekulinganisweni kwe-valve ukwehliswa kwesigaba esisodwa sokucindezela. Kubangela ukuthi isivinini sesitimu esiphezulu endaweni yokukhipha amavalvu sigqoke ingaphezulu ngenqubo ebizwa ngokuthi ukuguguleka. Uma ingcindezi yesitimu sokuhlinzeka ingama-oda amaningana obukhulu ngaphezu kwemfuneko yendawo, sicela ucabange ukwehlisa ingcindezi ngezigaba ezimbili noma ngaphezulu.
Iphuzu lokugcina losayizi we-valve ukucindezela okubalulekile. Leli yiphuzu lapho ukwanda okwengeziwe kokucindezela komfula kungeke kwandise ukugeleza kwe-steam nge-valve. Kubonisa ukuthi i-valve incane kakhulu ekusetshenzisweni kwenqubo edingekayo. Khumbula ukuthi ubukhulu be-valve akufanele bube bukhulu kakhulu ukugwema "ukuguqula", okungenzeka uma ukuguqulwa okuncane endaweni ye-valve kubangela ushintsho oluphawulekayo emsebenzini wokulawula, ikakhulukazi ngaphansi komthwalo oyingxenye.
Ukwakhiwa kwama-valve omusi kanye nezinqubo zawo kungaba nzima. Ukucaciswa kokuphatha umehluko wevolumu phakathi kwamanzi nesitimu, ukujiya, isando samanzi, nomsindo kungase kudide. Abantu abaningi benza lawa maphutha avamile lapho beklama isistimu yesitimu, ikakhulukazi ekuzameni kokuqala. Phela ukwenza amaphutha kuyingxenye engokwemvelo yokufunda. Ukwazi ulwazi ngokugcwele kungakusiza ugweme amaphutha angaholela ekwenyukeni kwezindleko kanye nesikhathi sokuphumula sezinhlelo zokusebenza zesitimu.
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Isikhathi sokuthumela: Oct-08-2021
