Uma abantu abaningi bezwa 'i-gasket', babona ngeso lengqondo injoloba emnyama indandatho kumpompi. Emhlabeni wethu, ihhashi lokusebenzela elithulile eliphethe ukucindezela, eliqukethe uketshezi, futhi livimbela ukwehluleka okuyinhlekelele. Umbono oyiphutha omkhulu? Ukuthi noma iyiphi ingxenye yezinto ezithobelayo ingenza umsebenzi. Ngibone amaphrojekthi amaningi kakhulu lapho gassela kwaba wumcabango osemuva, oholela ekuvuzeni, ukungasebenzi, kanye nokubiza emuva okubizayo. Akulona nje 'uphawu'; yingxenye ebaliwe.

Okubalulekile Akulona Nje Ishidi Elicacisiwe

Awukwazi ukukhetha into eshadini bese uyibiza ngosuku. I-spec ingase ithi i-NBR 70 Shore A, kodwa lokho kuyisiqalo nje. Ngikhumbula umsebenzi womhlangano omncane we-compressor usebenzisa i-nitrile evamile gassela. Iphumelele ukuhlolwa kwengcindezi, akunankinga. Kodwa ensimini, ezinyangeni ezimbalwa, baqala ukukhala amafutha. Indaba kwakungeyona ingcindezi; bekuyiphakheji elengeziwe kumafutha okwenziwa amasha. Kubangele i-NBR ukuthi ikhukhumale ngokwanele ukuba ilahlekelwe amandla ayo okubamba. Ishadi alizange likhulume ngalokho kuhlangana koketshezi oluthile. Kwadingeka sishintshele ezintweni ezisekelwe ku-fluorocarbon, ezazigcwele ukucindezela kodwa kudingekile ukuze kuhambisane namakhemikhali. Siyini isifundo? Ukuhlolwa kwelebhu nesevisi yomhlaba wangempela kungaba izilwane ezimbili ezihlukene.

Bese kuba nezinga lokushisa. Wonke umuntu ucabanga ngezinga lokushisa elizinzile. Umbulali wangempela ukuhamba ngebhayisikili okushisayo. I-flange iyashisa, iyanda, i gassela icindezela ngokuqhubekayo. Iyaphola, inkontileka, futhi uma i gassela ayilulami, uthola igebe. Ngibe nempumelelo nge-graphite enwetshiwe ezimweni zomjikelezo ophezulu, kodwa kuphela uma ukuphela kwe-flange kulungile. Ibushelelezi kakhulu, futhi ayikwazi ukubamba; ilukhuni kakhulu, futhi iyashumeka futhi ilahlekelwe ukuqina. Kuyisenzo sokulinganisa osifunda ngokudiliza imihlangano ehlulekile futhi ubheke amamaki ofakazi.

Yilapho ukuthengwa komkhiqizi okhethekile kwenza khona umehluko obonakalayo. Ngokwesibonelo, ukusebenza nenkampani efana I-Handan Zitai Fetesser Comment Co, Ltd., etholakala endaweni enkulu yokukhiqiza ingxenye ejwayelekile yaseChina, uthola ukufinyelela ekujuleni kolwazi lwenqubo. Ukuba seduze kwabo nezixhumanisi ezinkulu zezokuthutha ezifana ne-Beijing-Guangzhou Railway kusho ukuthi babone izinhlobonhlobo zezidingo zohlelo lokusebenza. Akukhona nje ukwenza ingxenye; kumayelana nokuqonda i-ecosystem ehlala kuyo—ama-flange, amabhawodi, ukulandelana kwetorque konke okusebenzisana gassela ukusebenza.

I-Flange iyingxenye yeMpi

A ephelele gassela ku-flange embi ukuvuza okuqinisekisiwe. Ukuqedwa kobuso kubalulekile, kodwa ukuthi kubaluleke kangakanani ukwedlula inombolo ye-Ra. I-spiral finish, i-concentric, iphonographic—ngayinye ibamba inhlanganisela yokuvala noma ibambe gassela ngokuhlukile. Ukuze uthole izinto ezithambile ezifana namashidi angewona we-asbestos, udinga amazinyo engeziwe ukuze uvimbele ukuphuma. Ngezinhlobo zejacket zensimbi, isiphetho esihle kakhulu siyadingeka ukuze ugweme ukusika isigcwalisi esithambile.

I-flatness ingomunye umbulali othule. Sibe nephrojekthi ye-retrofit kwezinye izishintshi zokushisa ezindala. Imvilophu ye-PTFE entsha, esebenza kahle kakhulu gasselailokhu ihluleka. Ngemva kwamasonto okunwaya ikhanda, sibeka umphetho oqondile ku-flange. Yayinomnsalo omncane, mhlawumbe u-0.2mm ngaphezu kuka-300mm, kusukela kumashumi eminyaka okucindezeleka okushisayo. I-fiber gaskets endala ecindezelwe yayihambisana nayo. Idizayini entsha, eqinile kakhulu ayikwazanga. Ukulungiswa bekungengcono gassela; yayilungisa kabusha ubuso be-flange. Kwesinye isikhathi isixazululo siba phezulu kwesici sokuvala sona uqobo.

Ukusatshalaliswa komthwalo we-bolt kuwumbono ofanele wetiyetha ongavamile ukuba khona ekusebenzeni. Umgomo uwukucindezelwa okufanayo, kodwa ukuzungezisa i-flange, ukuhlukaniswa kwebhawudi, nokuphonswa okulandelanayo kokuphonswa kwemigqa emisebenzini. Ngihlale ngigcizelela iphethini yokuqinisa ibhawudi elawulwayo, imvamisa iphethini enqamulayo ngamaphasi amaningi ukuya ku-spec torque. Noma kunjalo, ukusebenzisa i-hydraulic tensioner ne-calibrated torque wrench kungaveza amaphrofayili ahlukene wokucindezela gassela. Iwubuciko obufana nesayensi.

Lapho Okujwayelekile Kungangeni

Ikhathalogi ingumhlahlandlela, hhayi ivangeli. Ubukhulu obujwayelekile be-ASME B16.21 bayiphoyinti lokuqala. Kodwa ngilahlekelwe izikhathi okuye kwadingeka ukuthi sihambe ngazo ngendlela engekho ezingeni. Okuvamile ukujiya. Okushubile akuncono ukululama; kungaholela ekuphumuleni kwe-creep. Kodwa ekuxhumaneni okuphambene nokungalungi kahle okuphawulekayo noma i-warpage, ukuqina kancane, okucindezelwa kakhudlwana gassela kungaba ukulungiswa kwensimu ye-pragmatic kuze kuhlelwe ukulungiswa okufanele komshini.

Sake saba neklayenti elivuza okuqhubekayo kumugqa omkhulu we-asidi enobubanzi, onomfutho ophansi. Babesebenzisa i-elastomeric sheet evamile eqinisiwe eyisikwe endlini. Ukuvuza bekusejoyintini. Ukuhlola kubonise ukuthi ukusikeka kuhlanzekile, okokusebenza kwakulungile. Inkinga kwakuwumklamo ohlangene ngokwawo—i-flange elula yobuso obuyisicaba. Kulowo bubanzi kanye nokunyakaza okushisayo kwepayipi, kwakudinga uphawu oluvalekile, njengomsele we-O-ring noma inhlanganisela yesilonda sobuso obuphakanyisiwe. Siwathuthele ku-kammprofile gassela, enikeze ukuthintana kwensimbi kuya kwensimbi ukuze kugcinwe ubuqotho besakhiwo kanye nesendlalelo sokuvala esithambile sokungapheleli okuncane. Isixazululo esijwayelekile sasingalungile kumakhenikha wenhlangano.

Kulapho ikhono lomkhiqizi lokusingatha izicelo zangokwezifiso libaluleka khona. Umthombo onjengawo I-Handan Zitai Fetesser Comment Co, Ltd. akuyena nje umdayisi wezinto ezingekho eshalofini. Isikhundla sabo esizindeni esikhulu sezimboni sisho ukuthi bahlelelwe ukuphatha lezi zicelo ezingajwayelekile, ezingajwayelekile kahle. Ungakwazi ukuxoxa ngemodi ethile yokwehluleka—ukwenyuka, ukuhlasela kwamakhemikhali, ukuqhuma—futhi ngokuvamile bangaphakamisa inhlanganisela yezinto ezibonakalayo noma i-tweak yokwakha ngokusekelwe kuzimo ezifanayo abahlangabezane nazo. Ukuhlola izinsiza zabo ku https://www.zitaifasteners.com ingakunikeza isisekelo sobubanzi bawo obujwayelekile, okwazisa ukuthi yini engenzeka ukwenziwa ngendlela oyifisayo.

Ukwehluleka Uthisha Ongcono Kakhulu

Ufunda okuningi ekuvuzeni kunokuvuza uphawu oluphelele. Iphethini ixoxa indaba. Uphawu lokuminyanisa olufanayo olulula kakhulu? I-under-torqued. Uphawu olusindayo, oluchotshoziwe ohlangothini olulodwa nokukhanya kolunye? Ukungahambi kahle kwe-Flange noma umthwalo webhawodi ongalingani. Ukuhlasela kwamakhemikhali ngokuvamile kubonisa njengokuqhekeka, ukuvuvukala, noma ukushintsha kokuthungwa. Ukukhipha noma ukufutheka kububanzi obungaphakathi bukhomba kungcindezi eyeqile noma igebe elikhulu kakhulu gassela ubulukhuni.

Ngikhumbula ukwehluleka okuyinhlekelele endaweni yokuhlola ingxenye ye-hydraulic. Isilonda esivunguzayo gassela (SS304/Graphite) iqhume ngesikhathi sokuhlolwa kwe-pressure spike. Umcabango wokuqala: i-gasket yayinephutha. Ukuhlolwa kwesidumbu kubonise iringi yangaphakathi yayingaguquki, kodwa ukujikajika kwase kuqhamukile. Imbangela? Inqubo yokuhlola yayihilela imijikelezo yokucindezela esheshayo eyadala ukushintsha kwe-radial kancane kuma-flange. Idizayini yenxeba elivunguzayo ayikwazanga ukuphatha lokho kunyakaza kokugunda. Sashintshela kumongo wensimbi oqinile gassela kuleyo rig yokuhlola ethile. I-gasket yasekuqaleni yayilungele isevisi yesimo esiqinile, kodwa hhayi endaweni yokuhlola eguquguqukayo.

Ukugcina ilabhulali yokwehluleka ngokomzimba kubaluleke kakhulu. Ibhokisi lama-gasket amadala, avuzayo anamanothi ezimo zesevisi liwusizo kakhulu kunanoma iyiphi incwadi. Inikeza ireferensi ethintekayo, ebonakalayo eshayela umbandela wokukhetha ekhaya. Ikukhumbuza ukuthi gassela ingxenye yesistimu, hhayi ipulaki yomlingo.

Indlela ye-Pragmatic yokukhetha

Ngakho, ukhetha kanjani eyodwa? Qala ngokusobala: imidiya, izinga lokushisa, ingcindezi. Kodwa bese ubhoboza phansi. Ingabe i-vacuum ephelele? I-graphite ingaba yinkinga ngenxa ye-sublimation engaba khona; ungase udinge insimbi-O-ring. Ingabe kukhona ukuqaqa njalo? I-non-stick coating efana ne-PTFE esilondeni esivunguzayo ingavimbela ukunamathela kanye nokulimala. Izindleko ziyisici, kodwa izindleko eziphelele zobunikazi ziyimethrikhi yangempela. I-fiber gasket eshibhile ecindezelweyo edinga ukushintshwa ngakunye ukuvala shaqa ibiza kakhulu kunemvilophu yeprimiyamu ye-PTFE ehlala iminyaka.

Ungayizibi indawo yokufaka. Ingabe yigumbi elihlanzekile noma inkundla engcolile, engasogwini? Izinga lekhono lesifaki libalulekile. I-kammprofile eyinkimbinkimbi, enezendlalelo eziningi ingase ibe yinhle, kodwa uma izisebenzi zingaqeqeshelwe ukuyiphatha, idizayini elula yerabha ehlanganiswe nensimbi ingase ithembeke kakhudlwana kulowo mongo. Ukufakwa kalula kuyisici sokusebenza esisemthethweni.

Okokugcina, yakha ubudlelwano nomhlinzeki wezobuchwepheshe. Akukhona nje ngokuthumela i-PO. Kumayelana nokuba nengxoxo lapho ungasho khona ukuthi, Nasi isicelo sami, nakhu okungaphumelelanga okokugcina, futhi bangabuya nezinketho. Kungakhathaliseki ukuthi umsabalalisi wendawo noma uhlanganyela ngokuqondile nebhizinisi eligxile ekukhiqizeni njengalokhu I-Handan Zitai Fetesser Comment Co, Ltd., lokho kuxazululwa kwezinkinga ngokubambisana yilapho usuka ekuthengeni ingxenye uye ekubeni ubunjiniyela isisombululo. Indawo abakuyo esiFundazweni sase-Yongnian isho ukuthi bagxile kumfutho womkhakha, babhekana nezinselelo zomhlaba wangempela zokuvala nsuku zonke, hhayi nje eziwumcabango. Lokho kuqonda okusebenzayo kuhlunga ekuthuthukisweni nasekusekeleni umkhiqizo wabo.

Ekugcineni, a gassela kuyingxenye ethobekile ecelwe ukwenza umsebenzi ongenakwenzeka: gcwalisa igebe elincane phakathi kwezindawo ezimbili zensimbi ezingaphelele ngaphansi kwezimo ezihluke kakhulu. Ayikho impendulo eyodwa efanele, kuphela ukuvumelana okufanele kakhulu kwesimo esiseduze. Ubuchwepheshe busekwazini ukwenza lokho kuvumelana ngempumelelo.