Chinyengo 21

Malo oyikapo alibe malo ogwirira ntchito

Njira: Ngakhale kukhazikitsa kutakhala kovuta poyamba, ndikofunikira kuganizira ntchito ya wogwiritsa ntchito nthawi yayitali poika malo ake.valavukuti agwire ntchito. Pofuna kutsegula ndi kutsekavalavuZosavuta, ndi bwino kuyika gudumu lamanja la valavu kuti ligwirizane ndi chifuwa (nthawi zambiri mamita 1.2 kuchokera pansi pa chipinda chochitira opaleshoni). Pofuna kupewa kugwiritsa ntchito movutikira, gudumu lamanja la valavu yolandirira liyenera kuyang'ana mmwamba osati motsetsereka. Mavavu a makina omangira khoma ndi zida zina ziyenera kupereka malo okwanira kuti wogwiritsa ntchito ayime. Ndikoopsa kwambiri kugwira ntchito kumwamba, makamaka pogwiritsa ntchito acid-base, zinthu zoopsa, ndi zina zotero.

Chinyengo 22

Ma valve opangidwa ndi zinthu zofooka

Njira: Mukakhazikitsa ndi kumanga, samalani ndipo pewani kugunda ma valve opangidwa ndi zinthu zofooka. Yang'anani valavu, zizindikiro, ndi mitundu musanayike, ndipo yang'anani kuwonongeka kulikonse, makamaka ku tsinde la valavu. tsinde la valavu limakhala lopindika kwambiri panthawi yotumiza, choncho litembenuzeni kangapo kuti muwone ngati lawonongeka. Tsukani valavu kuchotsa zinyalala zilizonse. Kuti mupewe kuwononga gudumu lamanja kapena tsinde la valavu mukakweza valavu, chingwecho chiyenera kumangiriridwa ku flange m'malo mwa chilichonse mwa zigawozi. Kulumikizana kwa payipi ya valavu kuyenera kutsukidwa. Kuti muchotse zipsera za iron oxide, mchenga wamatope, slag yolumikizira, ndi zina, gwiritsani ntchito mpweya wopanikizika. Tinthu tambiri tambiri tambiri, monga slag yolumikizira, tingatseke ma valve ang'onoang'ono ndikupangitsa kuti asagwire ntchito kuwonjezera pa kukanda mosavuta pamwamba pa valavu. Pofuna kupewa kusonkhana mu valavu ndi kusokoneza kayendedwe ka zinthu, kulongedza kotsekera (line hemp plus lead oil kapena PTFE raw material tape) kuyenera kuzunguliridwa mozungulira ulusi wa payipi musanamangirire valavu yolumikizira. Onetsetsani kuti mwalimbitsa mabotolo mofanana komanso mofanana mukakhazikitsa ma valve opindika. Kuti valavu isapange kupanikizika kwambiri kapena kusweka, flange ya payipi ndi flange ya valavu ziyenera kukhala zofanana ndipo zikhale ndi malo okwanira. Zipangizo zofooka ndi ma valve amphamvu zochepa zimafuna chisamaliro chapadera. Ma valve opindika ndi payipi ayenera kupindika poyamba, kutsatiridwa ndi kutseguka kwathunthu kwa magawo otseka, ndipo pamapeto pake, kupindika kopanda mphamvu.

Chinyengo 23

Valavu ilibe njira zosungira kutentha ndi kuzizira

Miyeso: Ma valve ena amafunikanso kukhala ndi zinthu zotetezera kunja kuti kutentha ndi kuzizira zisungidwe. Nthawi zina payipi yotenthedwa ya nthunzi imawonjezeredwa ku chotenthetsera. Mtundu wa valavu yomwe iyenera kusungidwa yofunda kapena yozizira imadalira zomwe opanga amapanga. Mwachidule, kusunga kutentha kapena kutsatira kutentha kumafunikira ngati cholumikizira mkati mwa valavu chizizira kwambiri, zomwe zimachepetsa magwiridwe antchito kapena zimapangitsa valavu kuzizira. Momwemonso, valavu ikawonekera, zomwe sizili bwino popanga kapena zimapangitsa chisanu ndi zinthu zina zosafunikira, valavuyo iyenera kusungidwa yozizira. Zipangizo zotenthetsera zozizira zimaphatikizapo cork, perlite, thovu, pulasitiki, diatomaceous earth, asbestos, slag wear, glass wear, perlite, diatomaceous earth, ndi zina zotero.

Chinyengo 24

Chotchinga cha nthunzi sichinaikidwe

Miyeso: Ma valve ena ali ndi zida ndi ma bypasses kuwonjezera pa zinthu zoyambira zotetezera. Kuti musamavutike kukonza msampha, bypause yayikidwa. Pali ma valve ena omwe ayikidwa ndi bypause. Mkhalidwe, kufunika, ndi zofunikira pakupanga kwa valavu zimatsimikiza ngati bypause iyenera kuyikidwa.

Chinyengo 25

Kulongedza sikusinthidwa nthawi zonse

Miyeso: Mapaketi ena a ma valve omwe ali m'sitolo amafunika kusinthidwa chifukwa sagwira ntchito kapena sakugwirizana ndi njira yogwiritsira ntchito. Bokosi lodzaza nthawi zonse limadzazidwa ndi kulongedza kwachizolowezi ndipo valavu imawonetsedwa kuzinthu zosiyanasiyana, komabe valavu ikagwira ntchito, kulongedza kuyenera kusinthidwa kuti kugwirizane ndi njira yolumikizira. Kanikizani phukusilo pozungulira mozungulira. Msoko wa bwalo lililonse uyenera kukhala madigiri 45, ndipo misoko ya mabwalo iyenera kukhala madigiri 180 kutali. Gawo lotsika la gland tsopano liyenera kukakamizidwa ku kuya koyenera kwa chipinda cholongedza, komwe nthawi zambiri kumakhala 10-20% ya kuya konse kwa chipinda cholongedza. Kutalika kwa kulongedza kuyenera kuganizira izi. Ngodya ya msoko ya ma valve yokhala ndi miyezo yokhwima ndi madigiri 30. Misoko yozungulira imasiyana ndi madigiri 120 kuchokera kwa wina ndi mnzake. Mphete zitatu za rabara za O (rabala yachilengedwe yolimbana ndi alkali yofooka pansi pa madigiri 60 Celsius, rabala ya nitrile yolimbana ndi mafuta pansi pa madigiri 80 Celsius, ndi rabala ya fluorine yolimbana ndi zinthu zosiyanasiyana zowononga pansi pa madigiri 150 Celsius) zingagwiritsidwenso ntchito, kutengera momwe zinthu zilili, kuwonjezera pa zodzaza zomwe zatchulidwazi. Mphete za mbale za nayiloni (yolimbana ndi ammonia ndi alkali pansi pa madigiri 120 Celsius), mphete za polytetrafluoroethylene zomatidwa (yolimbana ndi zinthu zolimba zowononga pansi pa madigiri 200 Celsius), ndi zodzaza zina zooneka ngati mawonekedwe. Manga tepi ya polytetrafluoroethylene yaiwisi kunja kwa phukusi la asbestos wamba kuti muwonjezere kutseka ndikuchepetsa kuwonongeka kwa tsinde la valve chifukwa cha mphamvu zamagetsi. Kuti malowo akhale ofanana ndikusunga kuti asafe kwambiri, zungulirani tsinde la valavu mukukanikiza choyikapo. Musapendeke pamene mukulimbitsa gland ndi khama lokhazikika.