Inokodzera kuseta kwegedhi vharafu, globe valve, bhora vharafu, butterfly valveuye kudzvinyirira kuderedza vharafu mu petrochemical midziyo.Tarisa vharafu, vharafu yekuchengetedza, vharafu inogadzirisa, musungo wakaiswa ona mitemo yakakodzera.Hazvina kukodzera kugadzika kwevhavha pamvura yepasi pevhu uye pombi dzemvura.
1. Mitemo yegadziriro yevhavha
1.1 Mavharuvhu achaiswa zvinoenderana nerudzi uye huwandu hunoratidzwa muPID inoyerera chati yepombi uye chiridzwa.Kana iyo PID iine zvinodiwa chaizvo zvekuisa chinzvimbo chemamwe mavharuvhu, inofanirwa kuiswa zvinoenderana nemaitiro ekuita.
1.2 Mavharuvhu anofanirwa kurongeka munzvimbo iri nyore kuwana, iri nyore kushanda uye iri nyore kuchengetedza.Mavharuvhu pamitsara yemapombi anofanirwa kurongeka nechepakati, aine mapuratifomu ekushanda kana manera achitariswa.
2. Valve yekuisa chinzvimbo zvinodiwa
2.1 Mavharuvhu anochekwa achagadzikwa kana mapaipi epombi epombi yekupinza uye yekubuda nayo yakabatana natenzi wepombi gallery yefekitori yese.Nzvimbo yekuisa yevhavha inofanira kunge yakarongeka nechepakati kune rumwe rutivi rwenzvimbo yemudziyo, uye nzvimbo yekushanda inodiwa kana nzvimbo yekuchengetedza inofanira kuiswa.
2.2 Mavharuvhu anoda kugara achishandiswa, kugadzirisa uye kutsiva anozowanikwa munzvimbo iri nyore kusvika pasi, papuratifomu kana manera.Pneumatic uye magetsi mavharuvhu anofanirawo kurongeka munzvimbo dziri nyore kusvika.
2.3 Mavharuvhu asingade kushanda nguva nenguva (pakuvhura nekumisa chete) anofanirwa kuiswawo panzvimbo panogona kumiswa manera enguva pfupi kana asingakwanise kuvhiyiwa pasi.
2.4 Pakati pevhavha handwheel inofanira kuva 750 ~ 1500mm kubva panzvimbo yekushanda, uye iyo yakanyanya kufanira kureba ndeye 1200mm.Iyo yekuisa kureba kwevharuvhu isingade kushanda kazhinji inogona kusvika 1500 ~ 1800mm.Kana iyo yekuisa kureba isingagone kuderedzwa uye kazhinji kushanda kunodiwa, chikuva chekushanda kana kutsika kunofanirwa kuiswa mukugadzira.Mavharuvhu ari pamapombi uye midziyo ine ngozi ine ngozi haifanirwe kuiswa mukati mehurefu hwemusoro wemunhu.
2.5 Apo pakati pevhavha handwheel inopfuura 1800mm kubva pakukwirira kwenzvimbo yekushanda, zvakakodzera kuisa sprocket operation.Cheni ye sprocket inofanira kunge inosvika 800mm kubva pasi, uye hoko yeketani inofanira kuiswa kuti irembedze magumo echeni pamadziro ari pedyo kana positi, kuitira kuti isakanganisa nzira.
2.6 Pavhavha yakasungirirwa mumugero, kana chivharo chemugero chakazaruka uye chinogona kushandiswa, ruoko rwevhavha haifaniri kunge yakaderera kupfuura 300mm pasi pechifukidzo chegoronga.Kana yakadzikira kupfuura 300mm, iyo yekuwedzera lever yevharuvhu inofanirwa kuiswa kuitira kuti handwheel iri pasi pe100mm pazasi pechivharo chemugero.
2.7 Apo vharafu yakaiswa mugomba repombi inoda kushandiswa pasi, kana kuti vheji yakaiswa pasi pedenga repamusoro (platform), tsvimbo yekuwedzera yevhavha inogona kuiswa kuti iwedzere kune chivharo chevhavha, pasi uye chikuva chekushanda, uye elongation tsvimbo ruoko vhiri kureba kushanda pamusoro 1200mm zvakakodzera.Mavharuvhu ane madhayamita ezita eDN40 kana mashoma uye akaiswa shinda haafanirwe kushandirwa nema sprockets kana extender rods kudzivirira kukuvara kwevhavha.Kazhinji, mavharuvhu anofanirwa kushandiswa nekadiki sprocket kana danda rekuwedzera sezvinobvira.
2.8 Chinhambwe chiri pakati pevhiri reruoko rwevharuvhu rakarongwa kutenderedza chikuva uye kumucheto kwepuratifomu hakufanirwe kudarika 450 mm.Kana iyo yevhavha hunde uye handwheel inosvika kumusoro kwepuratifomu uye kureba kuri pasi pe2000 mm, haifanire kukanganisa kushanda uye kupfuura kweanoshanda, kuti usakonzerese kukuvara kwemunhu.
3. Makuru ekuisa vharafu zvinodiwa
3.1 Kushanda kwemavharuvhu makuru kunofanirwa kushandisa giya rekufambisa, uye nzvimbo yenzvimbo inodiwa neiyo nzira yekutapurirana inofanirwa kutariswa kana yaiswa.
3.2 Kutsigira kunofanira kuiswa kune rumwe rutivi kana mativi maviri evhavha yevhavha huru.Chitsigiro hachifaniri kunge chiri papombi pfupi inoda kubviswa panguva yekugadzirisa, uye kutsigirwa kwepombi hakufaniri kukanganiswa pakubvisa valve.Kazhinji, kureba pakati petsigiro nevharuvhu flange kunofanirwa kunge kwakakura kupfuura 300mm.
3.3 Nzvimbo yekuisa mavharuvhu makuru inofanira kunge iine nzvimbo yekushandisa crane, kana kufunga kuseta davit uye danda rekurembera.
4. Zvinodiwa mavharuvhu pahorizontal pombi
4.1 Kunze kwezvinodikanwa zvakakosha pakuita, vhiri reruoko rakaiswa pajekiseni rakachinjika pombi harifanirwe kudzika pasi, kunyanya vharafu paipi yepakati ine njodzi inorambidzwa zvachose.Mamiriro evharuvhu remaoko anotariswa nenzira inotevera: Yakatwasuka kumusoro; nekwaurizontal; yakatwasuka kumusoro kuruboshwe uye kurudyi inorereka 45°; yakatwasuka ichienda pasi kuruboshwe uye kurudyi inorereka 45°; kwete yakatwasuka ichidzika.
4.2 Horizontally mounted rising stem valve, kana vharuvhu yakavhurwa, chivharo chevhavha hachizokanganisa nzira, kunyanya kana chivharo chevhavha chiri mumusoro kana ibvi remushandisi.
5. Zvimwe zvinodiwa pakugadzirisa valve
5.1 Mutsetse wepakati wemavharuvhu papombi dzakafanana unofanirwa kuve wakatsvinda sezvinobvira.Kana iyo valve yakarongedzwa pedyo nemumwe, kureba kwakajeka pakati pemaoko emaoko hakufaniri kuva pasi pe100mm;Mavharuvhu anogona zvakare kudzedzereka kuderedza pombi nzvimbo.
5.2 Ivhavha inodiwa kuti ibatanidzwe kune mhuno yemidziyo mukuita iyi inofanirwa kubatanidzwa zvakananga kumudziyo wemidziyo kana iyo dhayamita yezita, kudzvanywa kwezita uye yekuisa chisimbiso yemhando yakafanana kana kufananidzwa nemudziyo wepfumbu flange.Kana vharafu iri concave flange, zvinodikanwa kubvunza nyanzvi yemidziyo kuti igadzirise iyo convex flange pane inoenderana nozzle.
5.3 Kunze kwekunge nzira yacho ine zvinodiwa zvakakosha, mavharuvhu ari pazasi mapaipi eshongwe, marejikita, midziyo yakatwasuka uye mimwe michina haizorongedzwe mujasi.
5.4 Apo pombi yebazi inotorwa kubva papombi huru, vheji yakachekwa inofanira kunge iri panzvimbo yakadzikama yepombi yebazi pedyo nemudzi wepombi huru, kuitira kuti mvura ibudiswe kumativi ose maviri evhavha.
5.5 Iyo yebazi pombi yekucheka-kubvisa valve pane pombi yepombi haiwanzo kushandiswa (chete yekumisa nekugadzirisa).Kana pasina manera echigarire, nzvimbo inofanira kutsaurirwa kushandiswa kwemanera echinguvana.
5.6 Kana iyo yevhavha yepamusoro yakavhurwa, simba rekutanga rakakura, uye chitsigiro chinofanira kuiswa kuti chitsigire valve uye kuderedza dambudziko rekutanga.Kukwirira kureba kunofanira kuva 500 ~ 1200mm.
5.7 Ivhavha yemvura yemoto nevhavha yemoto inopisa munzvimbo yemuganhu wechigadzirwa inofanira kugoverwa munzvimbo yakachengeteka mushandisi ari nyore kuwana kana chiitiko chetsaona.
5.8 Boka revhavha yemoto unodzima pombi yekugovera pombi yechoto chekupisa inofanira kunge iri nyore kushanda, uye kureba pakati pepombi yekugovera uye muviri wechoto haufaniri kuva pasi pe7.5m.
5.9 Kana uchiisa vharafu ine threaded connection papombi, mhenyu inofanira kuiswa pedyo nevhavha ye disassembly.
5.10 The clamp valve kanabutterfly valvehaifaniri kubatanidzwa zvakananga nemafuta emamwe mavharuvhu uye zvigadziro, uye pombi pfupi ine flanges kumativi ose maviri inofanira kuwedzerwa pakati.
5.11 Ivhavha haifaniri kutakura mutoro wekunze, kuitira kuti irege kukuvadza valve nekuda kwekunyanya kunetseka.
Nguva yekutumira: Feb-02-2023