Tsebo ea mantlha ea tšebeliso le tlhokomelo ea li-valve: ho kenya li-valve ho tlameha ho ela hloko litaba le lintlha

Tšebeliso le tlhokomelo ea li-valve tsebo ea motheo: ho kenya li-valve ho tlameha ho ela hloko litaba le lintlha tse ling tsa litekanyetso tsa motheo li na le litekanyetso tsa naha le tsa lefapha. Bophahamo ba lebitso la sebaka sa ho kena le ho tsoa ha valve ho bitsoa bophara ba lebitso la valve. E emetsoe ke Dg (tekanyetso ea naha ea Dn bakeng sa teko), ka limilimithara (mm). Bophahamo ba lebitso la valve bo hlalositsoe ho standard standard GB1074-70. Letoto la bophara ba li-valve le bonts'itsoe ho Lethathamo la 1-1. Tlas'a maemo a tloaelehileng, bophara ba lebitso la valve bo lumellana le bophara ba sebele. Ho na le ketsahalo ea hore bophara ba lebitso ha bo lumellane le bophara ba sebele ba valve e entsoeng e sebelisoang indastering ea lik'hemik'hale tse phahameng le petroleum. Khatello ea lebitso la valve e bitsoa khatello ea lebitso la valve. E hlalosoa ke Pg (tekanyetso ea naha e hlalosoa ke PN, khatello ea khatello ke bar), 'me sehlopha ke matla a lik'hilograma / cm2 (kgf / cm2). Haeba Pg16 e tšoauoa holim'a valve, khatello ea lebitso la valve ke matla a 16 kg / cm 2. Khatello ea lebitso la valve e hlalosoa ka mokhoa oa naha oa GB1048-70. Letoto la khatello ea lebitso la li-valve li bonts'oa ho Lethathamo la 1-2. Matla a sebele a khatello ea valve hangata a kholoanyane ho feta khatello ea lebitso la valve, e etselitsoeng ho nahana ka ntlha ea tšireletso. Ka matla a tlhahlobo ea khatello ea valve, ho ea ka litokisetso tsa ho lumelloa ho feta khatello ea lebitso, sebakeng sa ho sebetsa sa valve, e arotsoe ka thata holim'a mosebetsi oa khatello, ka kakaretso e khetha ka tlaase ho tekanyo ea khatello ea lebitso. Boraro, kamano pakeng tsa khatello ea ho sebetsa ea valve le mocheso o sebetsang oa valve sebakeng sa ho sebetsa sa khatello e bitsoa khatello ea ho sebetsa ea valve, e amanang le thepa le mocheso o sebetsang oa bohareng ba valve. . E emetsoe ke P, setšoantšo se hukung e ka tlase ho le letona la lentsoe la P ke bohareng ** mocheso o phahameng o arotsoe ka 10 integer. Mohlala, P42 e bonts'a khatello ea ho sebetsa ea mochini oa valve ka mocheso o phahameng ka ho fetisisa oa 425 ℃. Mocheso oa ho sebetsa oa valve le tafole e tsamaisanang le khatello e kholo ea ho sebetsa bakeng sa nakoana. Sheba Letlapa la 1-3, 4, 5. Mohlala oa kopo: matla a 40kg / cm 2 carbon steel valve ka mocheso o sebetsang oa 425 ℃ holim'a pipeline, khatello ea eona e phahameng ea ho sebetsa ke bokae ba pele ba tšeletseng ba tsoang tafoleng 1- 3 carbon steel column, fumana mocheso o sebetsang oa 425 ℃ grid ho sheba fatše, 'me u hlahlobe kholomo ea khatello ea 40 kg / cm 2 grid ho sheba fatše, Nomoro e mateanong a maballo a mabeli ke khatello e phahameng ea ts'ebetso ea P4222 kg / cm 2 ea valve ena ea carbon steel Sehare se loketseng sa valve ke ntlha e lokelang ho nahanoa ka moralo le khetho ea valve. Mokhoa oa ho tseba "valve medium" ka kopo bala sampole ea valve le buka ea anti-corrosion hammoho le ts'ebeliso le tlhokomelo ea valve Tsebo: valve ea ho kenya e tlameha ho ela hloko litaba le lintlha tsa boemo ba ho kenya li-valve, e tlameha ho ba bonolo ts'ebetso: le haeba ho kenya ho le thata ka nakoana, empa hape le bakeng sa mosebetsi oa nako e telele oa opareitara. Ho molemo hore letsoho la letsoho la valve le tsamaisane le sefuba (ka kakaretso ke limithara tse 1,2 ho tloha mokatong o sebetsang), e le hore ho be bonolo ho bula le ho koala valve. Ground valve handwheel e lokela ho ba holimo, u se ke ua sekamela, e le ho qoba ts'ebetso e sa hlakang. Mochine oa lerako o itšetlehile ka valve ea lisebelisoa, empa hape u siee sebaka sa hore opereishene a eme. Pele ho kenngoa, valve e lokela ho hlahlojoa ho hlahloba litlhaloso le mofuta le ho tseba hore na ho na le tšenyo leha e le efe, haholo-holo bakeng sa kutu ea valve. Boleng ba ho kenya li-valve, bo ama ka ho toba ts'ebeliso, kahoo e tlameha ho ela hloko ka hloko. (1) Tataiso le boemo Li-valve tse ngata li na le tataiso, joalo ka li-valve tsa globe, li-valve tsa throttle, li-valve tse fokotsang, li-valve tsa ho hlahloba, joalo-joalo, haeba li inverted, li tla ama ts'ebeliso le bophelo (joalo ka li-valve tsa throttle), kapa u se ke ua etsa joalo. sebetsa ho hang (joalo ka ho fokotsa li-valve), esita le ho baka kotsi (joalo ka li-valve tsa ho hlahloba). Sephahla se akaretsang, letšoao la tataiso holim'a 'mele oa valve; Haeba ho se joalo, e lokela ho tsejoa ka nepo ho ea ka molao-motheo o sebetsang oa valve. Kamore ea li-valve tsa valve ea lefats'e e na le asymmetrical, mokelikeli o lokela ho o tlohella ho tloha tlase ho ea holimo ka koung ea valve, e le hore ho hanyetsa mokelikeli ho fokotsehe (ho khethoa ke sebōpeho), ho bula matla a ho pholosa (ka lebaka la khatello e bohareng) , e koetsoe ka mor'a hore mochine o se ke oa hatella ho paka, ho lokisoa habonolo, ke ka lebaka leo valve ea globe e ke keng ea khelosoa. Li-valve tse ling le tsona li na le litšobotsi tsa tsona. Sebaka sa ho kenya li-valve, se tlameha ho ba se loketseng bakeng sa ts'ebetso: le haeba ho kenya ho le thata ka nakoana, empa hape le bakeng sa mosebetsi oa nako e telele oa opereishene. Ho molemo hore lebili la letsoho la valve le tsamaisane le sefuba (ka kakaretso ke limithara tse 1,2 ho tloha mokatong o sebetsang), e le hore ho be bonolo ho bula le ho koala valve. Ground valve handwheel e lokela ho ba holimo, u se ke ua sekamela, e le ho qoba ts'ebetso e sa hlakang. Mochine oa lerako o itšetlehile ka valve ea lisebelisoa, empa hape u siee sebaka sa hore opereishene a eme. Ho qoba ho phahamisa ts'ebetso, haholo-holo acid le alkali, mecha ea litaba e chefo, ho seng joalo ha e bolokehe. U se ke ua flip heke (ke hore letsoho la lebili fatše), ho seng joalo seaplane tla lula sebakeng sa bonnet nako e telele, ho le bonolo ho corrod bakoang, 'me bakeng sa ba bang ba tshebetso ditlhoko contraindicated. Ha ho bonolo ho fetola ho paka ka nako e le 'ngoe. Bula valve ea heke ea stem, u se ke ua e kenya fatše, ho seng joalo ka lebaka la kutu e mongobo e pepeneneng. Phahamisa phunya phunyang, tlhomamiso ho etsa bonnete ba hore disc paatsepama, e le hore ho phahamisa tenyetsehang. Swing hlahloba li-valve, ha hlomamisa ho etsa bonnete ba hore boemo ba Pin, e le hore feto-fetoha swing. Valofo e fokotsang e lokela ho kenngoa e otlolohile phala e otlolohileng, 'me u se ke ua sekamela ka tsela leha e le efe. (2) Ts'ebetso ea kaho Ho kenya le ho haha ​​ho tlameha ho ba hlokolosi hore ho se ke ha otla li-valve tse entsoeng ka thepa e brittle. Pele ho kenngoa, valve e lokela ho hlahlojoa ho hlahloba litlhaloso le mofuta le ho tseba hore na ho na le tšenyo leha e le efe, haholo-holo bakeng sa kutu ea valve. Hape retelehela ka makhetlo a 'maloa ho bona hore na e khelohile, hobane nakong ea lipalangoang, ho bonolo ho otla stem ea valve. Hape le litšila ka valve. Ha u phahamisa valve, thapo ha ea lokela ho tlamelloa ka letsoho kapa stem ho qoba tšenyo ea likarolo tsena, e lokela ho tlamelloa ho flange. Bakeng sa li-valve tse hokahaneng le pipeline, etsa bonnete ba hore u li hloekisa. Moea o hatelitsoeng o ka sebelisoa ho phethola tšepe ea oxide ea tšepe, lehlabathe, slag ea welding le litšila tse ling. Li-sundries tsena, ha li bonolo feela ho phunya sebaka sa ho tiisa holim'a valve, ho kenyelletsa le likaroloana tse kholo tsa li-sundries (tse kang welding slag), empa hape li ka thibela valve e nyenyane, e le hore e hlolehe. Ha o kenya valve ea screw, ho paka ho tiisa (thread le aluminium oli kapa polytetrafluoroethylene raw material lebanta) e lokela ho phutheloa holim'a khoele ea phala, u se ke ua kena ka har'a valve, e le hore u se ke ua senya sehlahisoa sa mohopolo, se ama phallo ea mecha ea litaba. Ha u kenya li-valve tse nang le flanged, ela hloko ho tiisa liboutu ka symmetrically le ka ho lekana. Li-valve flange le peipi li tlameha ho ba tse tšoanang, ho hlaka ho lekaneng, e le ho qoba khatello e feteletseng, kapa esita le ho phunyeha ha valve. Haholo-holo bakeng sa lisebelisoa tsa brittle le li-valve tse nang le matla a tlaase. Li-valve tse lokelang ho chesetsoa ka liphaephe li lokela ho ba letheba-welded pele, ebe li bula ka ho feletseng likarolo tse koalang, ebe li cheselletsa li shoele. (3) Mehato ea ts'ireletso Li-valve tse ling le tsona li tlameha ho ba le tšireletso e kantle, e leng ho pata le ho tsidifala. Ka linako tse ling ho kenyeletsoa lithapo tsa mouoane tse chesang. Ke valve ea mofuta ofe e lokelang ho kenngoa kapa ho bolokoa ho bata, ho latela litlhoko tsa tlhahiso. Ha e le hantle, moo sehare se ka har'a valve se fokotsang mocheso haholo, se tla ama katleho ea tlhahiso kapa ho hatsetsa valve, ho hlokahala hore u boloke mocheso, kapa esita le ho kopanya mocheso; Ha li-valve li pepesehile, li le mpe ho hlahisa kapa li baka serame le lintho tse ling tse mpe, hoa hlokahala ho boloka serame. Lisebelisoa tsa insulation ke asbestos, boea ba slag, boea ba khalase, perlite, diatomite, vermiculite, joalo-joalo; Lisebelisoa tse pholileng li kenyelletsa kork, perlite, foam, polasetiki joalo-joalo. (4) Bypass le sesebelisoa Li-valve tse ling, ntle le lisebelisoa tse hlokahalang tsa tšireletso, empa hape li na le bypass le lisebelisoa. Ho ile ha kenngoa tsela e pota-potileng. Ho bonolo ho lokisa leraba. Li-valve tse ling, le tsona li kentsoe ke bypass. Hore na ho kenya bypass, ho itšetlehile ka boemo ba valve, bohlokoa le litlhoko tsa tlhahiso. (5) packing replacement Inventory valve, ba bang ba paka ha ba molemo, ba bang ka tšebeliso ea mecha ea litaba ha e lumellane, sena se hloka ho fetola ho paka. Baetsi ba li-valve ba ke ke ba nahana ka tšebeliso ea li-unit tse likete tsa mecha ea litaba e fapaneng, lebokose la stuffing le lula le tletse motso o tloaelehileng, empa ha o sebelisoa, o tlameha ho lumella filler hore e ikamahanye le maemo. Ha u nkela sebaka sa ho tlatsa, tobetsa ho pota ka ho pota. Sekhahla se seng le se seng sa selikalikoe ho isa ho likhato tse 45 se nepahetse, se lekane 'me se bulele likhato tse 180. Bophahamo ba ho paka bo lokela ho nahanela kamore ea hore tšoelesa e tsoele pele ho hatella. Hajoale, karolo e ka tlase ea tšoelesa e lokela ho hatella phaposi ea ho paka botebong bo loketseng, boo ka kakaretso e ka bang 10-20% ea botebo bohle ba kamore ea ho paka. Bakeng sa li-valve tsa tlhoko e phahameng, Angle e kopaneng ke likhato tse 30. Seam pakeng tsa mehele e thekesela ka likhato tse 120. Ho phaella ho li-fillers tse ka holimo, li ka boela tsa sebelisoa ho ea ka boemo bo itseng, tšebeliso ea rabara ea O-ring (ho hanyetsa rabara ea tlhaho ka tlase ho likhato tse 60 tsa Celsius e fokolang alkali, butadiene ho hanyetsa ka tlaase ho likhato tse 80 tsa kristale ea oli, ho hanyetsa rabara ea Fluorine ka tlase ho likhato tse 150 tsa Celsius. mefuta e fapaneng ya mecha ea phatlalatso e senyang) likotoana tse tharo stacked polytetrafluoroethylene lesale (ho hanyetsa likhato tse ka tlaase ho 200 likhato tse matla tse senyang mecha ea phatlalatso) nylon sekotlolo lesale (ho hanyetsa ka tlase 120 likhato Celsius ammonia, alkali) le tse ling tse ho etsa filler. Lera la polytetrafluoroethylene (PTFE) tape ea thepa e tala e phuthetsoe ka ntle ho diski e tloaelehileng ea asbestos, e ka ntlafatsang phello ea ho tiisa le ho fokotsa ho bola ha electrochemical ea stem ea valve. Ha u hatella setlolo, hoa hlokahala ho potoloha kutu ea valve ka nako e le 'ngoe ho e boloka e le seaparo se pota-potileng le ho thibela hore e se ke ea shoa haholo. Hoa hlokahala ho tiisa tšoelesa ka mokhoa o ts'oanang le ho se sekame.