Electrochemical corrosion corrosion simbi nenzira dzakasiyana-siyana.Haisi kungoshanda pakati pesimbi mbiri chete, asi inogadzirawo mutsauko unokwanisa nekuda kwekusagadzikana kwemugadziriso, kunyungudika kwakashata kweokisijeni, uye musiyano mudiki muchimiro chemukati chesimbi, iyo inowedzera kukora..Mamwe masimbi pachawo haadzivirirwe nekuora, asi anogona kuburitsa yakanaka kwazvo inodzivirira firimu mushure mekuora, ndiko kuti, passivation film, inogona kudzivirira kukora kwepakati.Zvinogona kuonekwa kuti kuitira kuti zvizadzise chinangwa che-anti-corrosion of metal valves, imwe ndeyokubvisa electrochemical corrosion;imwe yacho ndeyekubvisa electrochemical corrosion;iyo passive film inofanira kuumbwa pamusoro pesimbi;chechitatu ndechekushandisa zvisiri-metallic zvinhu pasina electrochemical corrosion panzvimbo yesimbi zvinhu.Nzira dzinoverengeka dzekurwisa ngura dzinotsanangurwa pazasi.
1. Sarudza zvinhu zvinodzivirira corrosion maererano nepakati
Muchikamu che "Valve Selection", takaunza svikiro yakakodzera yezvinhu zvakajairika zvevhavha, asi ingori sumo yakajairika.Mukugadzirwa chaiko, kukora kwepakati kwakaoma kwazvo, kunyangwe ikashandiswa mukati mepakati Ivhavha yemidziyo yakafanana, kusungirira, tembiricha uye kudzvanywa kwepakati zvakasiyana, uye kukora kwepakati kusvika kune chinhu. zvakare zvakasiyana.Kana tembiricha yepakati ichiwedzera ne10°C, kukora kunowedzera kanenge ka1 kusvika katatu.Iyo yepakati concentration ine simba guru pakuora kwezvinhu zvevharuvhu.Somuenzaniso, kana mutobvu uri musulfuric acid ine chidimbu chiduku, ngura yacho iduku zvikuru.Kana iyo yekuisa inodarika 96%, ngura inokwira zvakanyanya.Kusiyana neizvi, kabhoni simbi ndiyo yakanyanya kuonda kana iyo sulfuric acid yakasangana ne50%, uye kana iyo yakawedzera kusvika kupfuura 6%, ngura inoderera zvakanyanya.Semuyenzaniso, aruminiyamu inoodza zvakanyanya muconcentrated nitric acid ine concentrated inopfuura 80%, asi yakasvibiswa zvakakomba pakati nepakati nepasi pe nitric acid.Kunyangwe simbi isina simbi ine kusimba kwakasimba kwekuramba kunyungudutsa nitric acid, iyo corrosion inowedzera mune inodarika 95% yakaomeswa nitric acid.
Zvinogona kuonekwa kubva mumienzaniso iri pamusoro apa kuti kusarudzwa kwakarurama kwezvinhu zvevharuvhu kunofanira kuenderana nemamiriro ezvinhu chaiwo, kuongorora zvinhu zvakasiyana-siyana zvinokanganisa kuora, uye sarudza zvinhu maererano nemagwaro akakodzera e-anti-corrosion.
2.Kushandisa zvinhu zvisiri zvesimbi
Non-metallic corrosion resistance yakanakisa.Chero bedzi iyo tembiricha yekushanda kwevhavha uye kumanikidza kunosangana nezvinodiwa zvezvinhu zvisiri zvesimbi, haigone kungogadzirisa dambudziko rekuora, asiwo kuchengetedza simbi dzinokosha.Muviri wevharuvhu, bhoneti, lining, chisimbiso chepamusoro, nezvimwe zvinowanzogadzirwa nezvinhu zvisiri zvesimbi.Kana ari gaskets, kurongedza kunonyanya kugadzirwa nezvinhu zvisiri zvesimbi.Iyo vharafu inogadzirwa nemapurasitiki akadai se polytetrafluoroethylene uye chlorinated polyether, pamwe nerabha seyakasikwa rabha, neoprene uye nitrile rabha, nepo muviri wevharuvhu uye chivharo chevhavha kazhinji chinogadzirwa nesimbi yakakandwa uye kabhoni simbi.Haisi kungovimbisa simba revhavha, asiwo inovimbisa kuti valve haina corrod.Iyo pinch valve yakagadzirwa zvakare yakavakirwa pane yakanakisa corrosion kuramba uye yakanakisa kusiyanisa kuita kwerabha.Mazuva ano, zviri kuwedzera uye zvakarurama kushandisa naironi, PTFE uye mamwe mapurasitiki, uye rabha rechisikigo nerabha rekugadzira kugadzira nzvimbo dzakasiyana-siyana dzekuisa chisimbiso uye zvindori zvekuvhara, izvo zvinoshandiswa pamhando dzakasiyana dzemavharuvhu.Izvi zvisiri-metallic zvinhu zvinoshandiswa sechisimbiso chepamusoro Material, kwete chete yakanaka corrosion resistance, asiwo yakanaka yekuisa chisimbiso kushanda, kunyanya yakakodzera kushandiswa mune midhiya ine zvimedu.Ehe, simba ravo uye kushorwa kwekupisa zvakaderera, zvichidzikamisa huwandu hwekushandisa.Kubuda kwe flexible graphite kwakaunza zvisiri-metals mumunda wepamusoro-tembiricha, yakagadzirisa nguva yakareba yakaoma kugadzirisa dambudziko rekurongedza uye gasket leakage, uye yakanaka yepamusoro-yekushisa lubricant.
3. Pfaya pendi
Coating ndiyo inonyanya kushandiswa anti-corrosion nzira, uye chinhu chakakosha chinorwisa-corrosion zvinhu uye chiratidzo chekuzivikanwa pane zvigadzirwa zvevharuvhu.Coatings zvakare isiri-simbi zvinhu.Iwo anowanzo gadzirwa nesynthetic resin, rubber slurry, mafuta emuriwo, solvent, nezvimwewo, uye anovhara pamusoro pesimbi kuti aparadzanise yepakati nemhepo kuti zvizadzise anti-corrosion zvinangwa.Coatings anonyanya kushandiswa munzvimbo dzisinganyanyi kuodza, senge mvura, mvura yemunyu, mvura yegungwa, uye mhepo.Iro mukati mevhavha rinowanzopendwa nependi ye-anti-corrosion kudzivirira mvura, mhepo uye mamwe ma media kubva pakuora valve.Iyo pendi inosanganiswa nemavara akasiyana kumiririra zvinhu zvinoshandiswa naFahn.Ivhavha inopfapfaidzwa nependi, kazhinji kamwe chete pamwedzi mitanhatu kusvika pagore.
4. Wedzera corrosion inhibitor
Kuwedzera hushoma hwezvimwe zvinhu zvakakosha kune inoora uye zvinhu zvinopisa zvinogona kuderedza zvakanyanya kumhanya kwesimbi.Chinhu chakakosha ichi chinonzi corrosion inhibitor.
Iyo nzira iyo iyo corrosion inhibitor inodzora corrosion ndeyekuti inosimudzira polarization yebhatiri.Corrosion inhibitors inonyanya kushandiswa mune media uye mafirita.Kuwedzera corrosion inhibitor kune yepakati kunogona kuderedza kukora kwemidziyo nemavharuvhu.Semuenzaniso, chromium-nickel simbi isina tsvina muokisijeni-isina sulfuric acid ine huwandu hwakawanda hwekunyungudika munzvimbo yakapiswa, uye iyo corrosion yakanyanya kuoma, asi shoma shoma yemhangura sulfate kana nitric acid inowedzerwa.Kana iyo oxidant inoshandiswa, simbi isina tsvina inogona kuchinjwa kuva mamiriro ekunze, uye firimu rinodzivirira rinoumbwa pamusoro pekudzivirira kuparara kwepakati.Mu hydrochloric acid, kana chidimbu chiduku che oxidant chichiwedzerwa, kuora kwetitanium kunogona kuderedzwa.Mvura inowanzoshandiswa seyekumanikidza kuyedza svikiro yevhavha pressure yekuyedza, zviri nyore kukonzeresa corrosion yevharuvhu.Kuwedzera shoma shoma ye sodium nitrite mumvura kunogona kudzivirira mvura kubva mukuora valve.Iyo asbestos packing ine chlorides, iyo inoshatisa hunde yevharuvhu zvakanyanya.Kana nzira yekugeza nemvura yakasvibiswa inoshandiswa, zvinyorwa zvekloridi zvinogona kuderedzwa.Zvisinei, nzira iyi yakaoma kushandisa uye haigoni kukurudzirwa kazhinji.Iyo ester yakakodzera kune zvakakosha zvinodiwa.
Kuti udzivirire hunde hwevhavha uye kudzivirira kuparara kweasbestos packing, tsinde yevhavha yakazadzwa ne corrosion inhibitor uye simbi yechibairo mukutakura asbestos.Iyo corrosion inhibitor inoumbwa ne sodium nitrite uye sodium chromate, iyo inogona kugadzira passivation firimu pamusoro pepamusoro pevhavha hunde kuti ivandudze corrosion resistance yevhavhavha;iyo solvent inogona kunyungudutsa zvishoma nezvishoma iyo corrosion inhibitor uye kuita basa rekuzora;mu asbestos Zinc poda inowedzerwa sesimbi yechibairo.Muchokwadi, zinc zvakare iri corrosion inhibitor.Inogona kutanga kusanganiswa nekloridi mu asbestos, kuitira kuti kushamwaridzana pakati pekloridi nevhavha stem metal kuderedzwa zvikuru, kuitira kuti uwane chinangwa chekudzivirira-corrosion.Kana corrosion inhibitor yakaita tsvuku tsvuku uye calcium lead acid yakawedzerwa papende, kupfapfaidza pamusoro pevharuvhu kunogona kudzivirira kuparara kwemhepo.
5. Electrochemical protection
Kune marudzi maviri ekudzivirira kwe electrochemical: anodic kudzivirira uye cathodic kudzivirira.Izvo zvinonzi anodic kudzivirira ndeye kushandisa simbi inodzivirira seanode kuunza yekunze yakananga ikozvino kuwedzera inode inogoneka munzira yakanaka.Kana ichiwedzera kune imwe kukosha, dense inodzivirira firimu inoumbwa pamusoro peiyo anode yesimbi, iyo passivation film.Corrosion yesimbi cathodes inoderera zvakanyanya.Anodic dziviriro inokodzera simbi dzinopfuura nyore nyore.Izvo zvinonzi cathodic kudzivirira zvinoreva kuti simbi yakachengetedzwa inoshandiswa se cathode, uye yakananga ikozvino inoshandiswa kuderedza kukwanisa kwayo munzira yakaipa.Kana yasvika pane imwe inogona kukosha, iyo corrosion current speed inodzikiswa uye simbi inodzivirirwa.Mukuwedzera, kudzivirira kwe cathodic kunogona kuchengetedza simbi yakachengetedzwa nesimbi iyo electrode inogona kuipa kupfuura iyo yesimbi yakachengetedzwa.Kana zingi ikashandiswa kudzivirira simbi, zingi inoora, uye zingi inonzi simbi yechibairo.Muchiito chekugadzira, anodic kudzivirira kunoshandiswa kushoma, uye cathodic kudzivirira kunoshandiswa zvakanyanya.Mavhavha makuru uye mavharuvhu akakosha anoshandisa iyi nzira yekudzivirira ye cathodic, inova nzira yehupfumi, iri nyore uye inoshanda.Zinc inowedzerwa kune asbestos filler kuchengetedza tsinde yevhavha, iyo zvakare iri ye cathodic kuchengetedza nzira.
6. Metal pamusoro kurapwa
Metal surface treatment processs zviri nani pane yakavharika coating, pamusoro pekupinda, surface oxidation passivation, etc. Chinangwa chayo ndechekuvandudza kushorwa kwesimbi uye kuvandudza simba remagetsi resimbi.Mavharuvhu akaiswa pamusoro anoshandiswa zvakanyanya.
Iyo valve yekubatanidza screw inowanzo galvanized, chrome-plated, uye oxidized (blued) kuvandudza kupikisa kumhepo uye yepakati ngura.Pamusoro penzira dzataurwa pamusoro pezvimwe zvinosungirirwa, kurapwa kwepamusoro senge phosphating kunoshandiswawo zvinoenderana nemamiriro ezvinhu.
Iyo yekuisa chisimbiso uye zvikamu zvekuvhara zvine diki caliber zvinowanzo shandisa nzira dzepamusoro senge nitriding uye boronizing kuti ivandudze kusakara kwayo uye kusapfeka.Ivhavha disc yakagadzirwa ne38CrMoAlA, iyo nitrided layer yakakura kupfuura kana yakaenzana ne0.4mm.
Dambudziko revhavha stem anti-corrosion idambudziko rinotariswa nevanhu.Isu takaunganidza ruzivo rwakapfuma rwekugadzira.Matanho ekurapa epamusoro senge nitriding, boronizing, chrome plating uye nickel plating anowanzo shandiswa kuvandudza corrosion resistance, corrosion resistance uye abrasion resistance.kukuvara kuita.Kurapa kwakasiyana kwepamusoro kunofanirwa kuve kwakakodzera kune akasiyana mavharuvhu stem zvinhu uye nharaunda yekushanda.Irovhavha hunde inosangana nemhepo, mvura mhute yepakati uye asbestos kurongedza inogona kuiswa ne hard chrome uye gas nitriding process (stainless simbi haina kukodzera ion nitriding process);Mumhepo yehydrogen sulfide, vharafu inoiswa electroplated nepamusoro phosphorus nickel coating, iyo ine zvirinani kudzivirira kuita;38CrMoAlA inogonawo kuramba corrosion neion uye gasi nitriding, asi haina kukodzera kushandisa yakaoma chromium coating;2Cr13 inogona kuramba ammonia corrosion mushure mekudzima uye kupisa.Carbon simbi inoshandisa gasi nitriding zvakare inopesana neammonia corrosion, nepo zvese phosphorus-nickel coatings hazvidzivirirwe neammonia corrosion;mushure mekuita gasi nitriding, 38CrMoAlA zvinhu zvine kunaka kwekusagadzikana uye kuita kwakazara, uye inoshandiswa kune akawanda mavharuvhu madzinde.
Diki-dhayamita mavharuvhu miviri uye maoko-mavhiri zvakare anowanzo chrome-akapfatwa kuti avandudze kurwisa kwavo kutu uye kushongedza vharafu.
7. Thermal spraying
Thermal spraying imhando ye process block yekugadzira machira uye yave imwe yehutsva tekinoroji yekuchengetedza zvinhu zvepasi.Ipurojekiti yekusimudzira kiyi yenyika.Inoshandisa yakakwira simba density kupisa sosi (gasi rinopisa moto, magetsi arc, plasma arc, magetsi kupisa, gasi kuputika, nezvimwewo) kupisa nekunyungudutsa simbi kana zvisiri-simbi zvinhu, uye wobva wapfapfaidza iyo pane pretreated basic surface fomu yeatomization kuumba chifukidzo chekupfapfaidza., kana kupisa nzvimbo yepamusoro panguva imwe chete, kuitira kuti chifukidzo chinyunguduke zvakare pamusoro pe substrate, uye nzira yekusimbisa nzvimbo ye spray welding layer inoumbwa.Mazhinji masimbi uye alloys adzo, simbi oxide ceramics, cermet composite, uye yakaoma simbi komisheni inogona kuputirwa pane esimbi kana asiri-metallic substrates neimwe kana anopfuura yekupisa yekupfapfaidza nzira.
Kupfapfaidza kwemafuta kunogona kuvandudza kusakara kwayo kwepasi, kusakara, kusamira kwekushisa kwepamusoro uye zvimwe zvivakwa, uye kurebesa hupenyu hwayo hwesevhisi.Thermal spray coating ine akakosha zvimiro senge kupisa kupisa, insulation (kana magetsi akasiyana), kugadzika chisimbiso, self-lubricating, kupisa radiation, electromagnetic shielding, nezvimwewo;zvikamu zvinogona kugadziriswa nekupfapfaidza kwekupisa.
8. Dzora nharaunda inoora
Iyo inonzi mhoteredzo ine pfungwa mbiri dzakafara uye nhete.Iyo yakafara nharaunda inoreva nharaunda yakatenderedza valve yekuisa saiti uye yayo yemukati yekutenderera yepakati;iyo nhete pfungwa nharaunda inoreva mamiriro akatenderedza valve yekuisa saiti.Mazhinji nharaunda haagone kudzorwa uye maitiro ekugadzira haagone kuchinjika zvisina tsarukano.Chete muchiitiko chekuti hachizokonzere kukuvadza kune chigadzirwa, maitiro, nezvimwewo, nzira yekudzora nharaunda inogona kushandiswa, senge deoxidizing boiler mvura, kugadzirisa pH kukosha kwemumba alkali mukunatsa, nezvimwe. iyi pfungwa yekuona, iyo yakataurwa pamusoro apa ye corrosion inhibitors, electrochemical protection, etc. inodzorwawo nzvimbo dzekuora.
Mamiriro ekunze azere neguruva, mhute yemvura uye utsi, kunyanya munzvimbo yekugadzira, yakadai sehutsi halogen, magasi ane muchetura uye hupfu hwakatsetseka hunoburitswa nemidziyo, iyo inoshatisa vharafu kune madhigirii akasiyana.Vashandi vanofanira kugara vachichenesa uye kuchenesa mavharuvhu uye kuwedzera mafuta nguva dzose maererano nemirairo mumaitirwo ekushanda, ayo ari matanho anoshanda ekudzora kukanganisa kwezvakatipoteredza.Irovha yevhavha inosungirirwa nevhavha yekudzivirira, vheji yevhu inoiswa muvhu zvakanaka, uye nzvimbo yevhavha inoputirwa nepende, nezvimwewo, iyo yose nzira dzekudzivirira kusvibiswa kwevhavha kubva kune zvinhu zvinopisa.Yakakwira ambient tembiricha uye kusvibiswa kwemhepo, kunyanya kumidziyo nemavharuvhu munzvimbo dzakavharwa, zvinomhanyisa kukora kwavo.Vhura mawekishopu kana kufefetedza nekutonhodza matanho anofanirwa kutorwa nepose pazvinogoneka kuderedza kukoromoka kwenzvimbo.
9. Kuvandudza teknolojia yekugadzirisa uye chimiro chevhavha
Iyo anti-corrosion kuchengetedzwa kwevhavha idambudziko rinotariswa kubva padhizaini, chigadzirwa chevharuvhu chine dhizaini yemaitiro uye nzira yakaringana yekuita.Hapana mubvunzo kuti ine simba rakanaka pakuderedza kuparara kwevhavha.
KUSANGANA KUDZOKERA CHECK VAVIVE
1.Bolted Bonnet, uye mhando yepakati flange gasket inogona kunge yakasiyana maererano nekumanikidza kirasi.
2.Disc Stop mudziyo kudzivirira dhisiki kubva kuvhurika zvakanyanya, nokudaro zvichikonzera kutadza kuvharwa pasi.
3.Solid Pin yakanyatsoiswa uye inopiwa nehupamhi hwepamusoro kuti ive nechokwadi chekushanda kwekushanda uye hupenyu hwebasa revhavha.
4.Rocker ruoko inopiwa zvakakwana intensity,Pakuvharwa pasi,Rine rusununguko zvakakwana nokuda kuvhara pasi mavharuvhu Disc.
5.Valve dhisiki inopiwa kusimba zvakakwana uye rigidity, Disc chisimbiso pamusoro zvichida akavaka-up welded nezvinhu zvakaoma kana inlaid neasiri-simbi zvinhu achipindura vanoshandisa 'zvikumbiro.
6.Large Size Swing Check Valve inopiwa neKusimudza Rings yeHoisting.
HORIZONTAL SWING CHECK VALVES
1. Muviri: RXVAL yakakandwa simbi miviri inopa yakaderera kuramba kuyerera uye optimum simba uye kushanda.
2. Chivharo: Chivharo chinobvumira kupinda kune zvikamu zvemukati.
3. Kavha Gasket: Iyo yekuvharira gasket inogadzira chisimbiso-chisina kubuda pakati pebhoneti nemuviri.
4. Seat Ring: Kuchengetedza shutoff yakagadzikana, chindori chechigaro chinosungirirwa uye chisimbiso-chinosungirirwa mukati mevhavha, ipapo ivhu rakakwana rekugara kwakakwana.
5. Disc: Iyo dhisiki inobvumira uni-directional kuyerera uye inomisa kumashure kuyerera nedambudziko kusununguka kuvharwa.
6. Swing Arm: Ruoko runotenderedza runobvumira disc kuvhura uye kuvhara.
7. & 8. Disc Nut & Pin: The disc nut uye pini inochengetedza dhidhi kune ruoko runozununguka.
9. Hinge Pin: Pini yehinge inopa nzira yakagadzikana yekuti ruoko rwekuzunguza rushande.
10. Plug: Plug inochengetedza pini yeruoko mukati mevhavha.
11. Plug Gasket: Iyo plug gasket inogadzira chisimbiso-chisina kubuda pakati peplug nemuviri.
12. & 13. Cover Studs & Nuts: The cover studs and nuts inochengetedza bhoneti kumuviri.
14. Eyebolt: The eyebolt inoshandiswa kubatsira mukusimudza valve
Cherechedza: Makirasi 150 & 300 anoshandisa ekunze hinge pini
BRONZE GATE VALVE FLANGE END
1) Kuramba kuyerera kudiki.Iyo yepakati chiteshi mukati memuviri wevharuvhu yakatwasuka, iyo yepakati inoyerera mumutsara wakatwasuka, uye kuyerera kwekudzivirira kudiki.
2)Inonyanya kuchengetedza basa kana uchivhura nekuvhara.Kuenzaniswa nevhavha yepasi rose, nekuti ingave yakavhurika kana yakavharwa, kutungamira kwekufamba kwegedhi kune perpendicular kuyerera kwepakati.
3) Kureba kwakakura uye nguva yekuvhura nekuvhara yakareba.Kuvhura nekuvhara kwegedhi kwakakura, uye kusimudza nekudzikisa kunoitwa ne screw.
4) Sando yemvura chiitiko hachisi nyore kuitika.Chikonzero inguva refu yekuvhara.
5) Iyo yepakati inogona kuyerera mune chero nzira pamativi ese, zviri nyore kuisa.Mugero wevharuvhu wegedhi wakaenzana kumativi ese.
Nguva yekutumira: Aug-23-2022