Iindaba

Kwiindawo ze-petrochemical, iikhemikhali, ukuveliswa kombane, kunye nokucoca amanzi, iinkqubo zeevalvu zidlala indima ebalulekileyo ekuthuthweni kolwelo kunye nolawulo lokhuseleko. Kulondolozo lwezityalo, ezona zinto zixhaphakileyo zokungaqhubi kakuhle okanye ukwehla kokusebenza zihlala zingengomzimba weevalvu ngokwazo, kodwa zizinto zangaphakathi zeevalvu—iziqu, izihlalo, iibhola, iigland zokupakisha, kunye nezinye izixhobo ezibalulekileyo.

Kwizityalo zesinyithi, ukusilela kweevalvu akusoloko kubhekiselele kumzimba wevalvu ephambili. Amaxesha amaninzi, ziindawo zangaphakathi—isihlalo, isiqu, igland—ezinikezelayo xa kushushu kakhulu, kugqwala, okanye kuxinzelelo oluqhubekayo.

Kwishishini leekhemikhali, apho imibhobho iphatha ii-asidi, ii-alkali, izinyibilikisi, kunye nomphunga oxinezelekileyo, ukusilela kwezixhobo akuyongxaki yokulungisa nje kuphela—ngumngcipheko wemveliso. Phakathi kwazo zonke izinto zoomatshini, iivalvu zezinye zezona zinto zithembeke kakhulu...

Indandatho yokuxhasa iindawo ezinjalo, kwisakhiwo sonke sesitywino seseendawo eziphambili 'ezifihliweyo'. Abasebenzisi abaninzi abayinaki kakhulu, kodwa eneneni, xa uyilo okanye ukucutshungulwa kungasekho, ukusasazwa kwamandla okucinezelwa kwesitywino sesihlalo sevalvu, iringi yePTFE kuya kuba nefuthe elikhulu, ingakumbi kuxinzelelo oluphezulu okanye ukuguquguquka kobushushu kwindawo engqongileyo okucacileyo ngakumbi.

Kwisakhiwo seevalvu zebhola kunye neevalvu zesango, ibhokisi yokuzalisa njengenxalenye ephambili yenkqubo yokutywina isiqu, nangona isakhiwo esingaguqukiyo, kodwa ngokuthe ngqo yenza umsebenzi obalulekileyo wokuthintela ukuvuza kweendaba.

I-shaft esezantsi yevalvu yebhola esisigxina idla ngokuba yinto elula ukuyihoya kodwa ebiza kakhulu. Nokuba i-ball core ijikeleza kakuhle kwaye nokuba i-axis itshintshiwe okanye ayitshintshi, kudla ngokuxhomekeka ekubeni ubungakanani kunye ne-center datum yale shaft isezantsi ilawulwa na kwizigaba zokwenziwa kunye nokuhlanganiswa.

Kwinkqubo yangoku yemizi-mveliso yokhuseleko kunye nokuzinza kokusebenza kwexesha elide, iimfuno ziyaqhubeka nokuphucula imvelaphi, umzimba wevalvu njengezinto eziphambili zoxinzelelo, uyilo lwayo lwengqiqo kunye nolawulo lwenkqubo yokuvelisa zichaphazela ngqo ukusebenza komatshini.

Emva kokwenza iiprojekthi zeevalvu kule minyaka idlulileyo, ukuba ndinyanisekile, ndibone iimeko ezininzi zeengxaki zesihlalo sevalvu. Uninzi lwexesha, umsebenzisi ukhalaza ngokuvuza kwevalvu, eneneni, kungeyongxaki yespool, kodwa isihlalo sevalvu kudala sigugile.

Umzimba wevalvu yeyona nxalenye ilula kwaye kulula ukuyihoya kwivalvu. Ulwakhiwo lubonakala lulula, eneneni, ukusuka kwindlela yokuphosa, ukukhethwa kwezinto ukuya kubungakanani obuchanekileyo, zonke ezi zinto zigqiba ukuba ivalvu ingasebenza ixesha elide ngaphandle kokuvuza, ngaphandle kokuguquka.

Kwiinkqubo zolawulo ezinkulu kwishishini lesinyithi, ukusebenza kweevalvu zebhola kunye nokufakelwa kweevalvu zesango kuchaphazela ngokuthe ngqo uzinzo lokusebenza kwemibhobho ye-oven kunye neenkqubo zamanzi okupholisa.