Mfundo zazikuluzikulu za kusankha ma valve
1. Fotokozani cholinga cha valve mu zipangizo kapena chipangizo
Dziwani momwe ma valve amagwirira ntchito: chikhalidwe cha sing'anga yoyenera, kuthamanga kwa ntchito, kutentha kwa ntchito ndi njira yoyendetsera ntchito, ndi zina zotero.
2. Sankhani bwino mtundu wa valve
Kusankha koyenera kwa mtundu wa valavu kumatengera kumvetsetsa kwa mlengi wa njira yonse yopangira ndi momwe amagwirira ntchito ngati chofunikira. Posankha mtundu wa valavu, wopanga ayenera kumvetsetsa kamangidwe kake ndi momwe ma valve amagwirira ntchito.
3. Dziwani kugwirizana kwa mapeto a valve
Pakati pa malumikizidwe opangidwa ndi ulusi, malumikizidwe a flange, ndi ma welded end, awiri oyambirira ndi omwe amagwiritsidwa ntchito kwambiri. Mavavu okhala ndi ulusi makamaka mavavu okhala ndi m'mimba mwake pansi pa 50mm. Ngati m'mimba mwake ndi waukulu kwambiri, zidzakhala zovuta kwambiri kukhazikitsa ndi kusindikiza kugwirizana.
Ma valve olumikizidwa ndi flange ndi osavuta kukhazikitsa ndi kugawa, koma ndi olemera komanso okwera mtengo kuposa ma valve olumikizidwa ndi screw, motero ndi oyenera kulumikiza mapaipi amitundu yosiyanasiyana ndi zovuta.
Kulumikiza kuwotcherera ndi koyenera pazolemetsa zolemetsa ndipo ndikodalirika kuposa kulumikizana kwa flange. Komabe, n'zovuta kusokoneza ndikubwezeretsanso valavu yolumikizidwa ndi kuwotcherera, kotero kuti kugwiritsidwa ntchito kwake kumangokhala pazochitika zomwe nthawi zambiri zimatha kugwira ntchito modalirika kwa nthawi yayitali, kapena kumene ntchitoyo imakhala yolemetsa komanso kutentha kwakukulu.
4. Kusankha zinthu za valve
Posankha zinthu za chipolopolo cha valavu, ziwalo zamkati ndi kusindikiza pamwamba, kuphatikizapo kuganizira zakuthupi (kutentha, kuthamanga) ndi mankhwala (kuwononga) kwa sing'anga yogwira ntchito, ukhondo wa sing'anga (kapena popanda tinthu tating'onoting'ono) iyeneranso kugwidwa. Kuphatikiza apo, m'pofunika kutchula malamulo oyenerera a dziko ndi dipatimenti yogwiritsira ntchito.
Kusankhidwa koyenera ndi koyenera kwa zida za valve kungathe kupeza moyo wautumiki wachuma kwambiri komanso ntchito yabwino ya valve. Kusankhidwa kwa ma valve a thupi ndi: kuponyedwa kwachitsulo-carbon zitsulo-zitsulo zosapanga dzimbiri, ndipo ndondomeko yosankha mphete yosindikizira ndi: rabara-copper-alloy steel-F4.
5. Zina
Kuonjezera apo, kuthamanga kwa kuthamanga ndi kuthamanga kwa madzi omwe akuyenda mu valavu ayeneranso kutsimikiziridwa, ndipo valavu yoyenera iyenera kusankhidwa pogwiritsa ntchito zomwe zilipo (monga ma catalogs a valve product, zitsanzo za valve, etc.).
Malangizo osankhidwa bwino a valve
1:Malangizo osankhidwa a valve pachipata
Kawirikawiri, ma valve a zipata ayenera kukhala chisankho choyamba. Kuwonjezera pa oyenera nthunzi, mafuta ndi TV zina, mavavu pachipata ndi oyenera TV okhala zolimba granular ndi mkulu mamasukidwe akayendedwe, ndi oyenera mavavu mu venting ndi otsika vacuum kachitidwe. Kwa media yokhala ndi tinthu tating'onoting'ono, valavu ya valve yachipata iyenera kukhala ndi bowo limodzi kapena awiri. Kwa media yotsika kutentha, ma valve apadera otsika kutentha ayenera kugwiritsidwa ntchito.
2: Malangizo pakusankha vavu yapadziko lonse lapansi
Vavu yoyimitsa ndi yoyenera mapaipi omwe safuna kukana okhwima madzimadzi, ndiko kuti, mapaipi kapena zida zokhala ndi kutentha kwambiri komanso sing'anga yothamanga kwambiri zomwe sizimaganizira kutayika kwa kuthamanga, ndipo ndizoyenera mapaipi apakati monga nthunzi ndi DN<200mm;
Mavavu ang'onoang'ono amatha kusankha ma valve a globe, monga mavavu a singano, ma valve a zida, mavavu a zitsanzo, ma valve oyesa kuthamanga, ndi zina zotero;
Valavu yoyimitsa imakhala ndi kusintha kwa kayendedwe kake kapena kusinthasintha, koma kulondola kwa kusintha sikuli kwakukulu, ndipo m'mimba mwake ya chitoliro ndi yaying'ono, ndi bwino kugwiritsa ntchito valve yoyimitsa kapena valve;
Pazofalitsa zapoizoni kwambiri, valavu yotsekedwa ndi bellow iyenera kugwiritsidwa ntchito; Komabe, valavu yapadziko lonse sayenera kugwiritsidwa ntchito pazofalitsa zokhala ndi viscosity yapamwamba komanso zofalitsa zomwe zimakhala ndi tinthu tating'onoting'ono tosavuta, komanso siziyenera kugwiritsidwa ntchito ngati valavu yotulutsa mpweya kapena valve yotsika.
3:Malangizo osankha valavu ya mpira
Valve ya mpira ndi yoyenera kutentha kwapang'onopang'ono, kuthamanga kwambiri, komanso kukhathamiritsa kwamphamvu kwambiri. Mavavu ambiri a mpira amatha kugwiritsidwa ntchito pazofalitsa zokhala ndi tinthu tating'onoting'ono, ndipo angagwiritsidwenso ntchito muufa ndi ma media ang'onoang'ono malinga ndi zofunikira zosindikizira;
Valavu ya mpira wamtundu uliwonse siyenera kusintha kayendedwe kake, koma ndi yoyenera pazochitika zomwe zimafuna kutsegula ndi kutseka mwamsanga, zomwe zimakhala zosavuta kuzimitsa mwadzidzidzi kwa ngozi; Nthawi zambiri posindikiza mwamphamvu, kuvala, ndime yokhotakhota, kutsegula ndi kutseka mwachangu, kudulidwa kwamphamvu (kusiyana kwakukulu kwapakati), M'mapaipi okhala ndi phokoso lochepa, vaporization, torque yaying'ono yogwirira ntchito, komanso kukana kwamadzi pang'ono, ma valve a mpira amalimbikitsidwa.
Valavu ya mpira ndiyoyenera kupanga mawonekedwe opepuka, kutsika kwapakatikati, ndi media zowononga; valavu ya mpira ndiyenso valavu yabwino kwambiri yotsika kutentha komanso media ya cryogenic. Kwa makina opangira mapaipi ndi chipangizo cha media otsika kutentha, valavu yotsika ya mpira yokhala ndi bonnet iyenera kusankhidwa;
Posankha valavu ya mpira woyandama, mipando yake iyenera kunyamula katundu wa mpira ndi sing'anga yogwirira ntchito. Mavavu akuluakulu a mpira amafunikira mphamvu yayikulu pakugwira ntchito, DN≥
Vavu ya mpira wa 200mm iyenera kugwiritsa ntchito mawonekedwe otumizira mphutsi; valavu ya mpira yosasunthika ndi yoyenera m'mimba mwake yokulirapo komanso nthawi zopanikizika; kuwonjezera apo, valavu ya mpira yomwe imagwiritsidwa ntchito popangira zinthu zapoizoni kwambiri komanso mapaipi oyaka moto apakati ayenera kukhala ndi mawonekedwe osawotcha komanso antistatic.
4:Malangizo osankhidwa a valve
Valve ya throttle ndi yoyenera pazochitika zomwe kutentha kwapakati kumakhala kochepa komanso kupanikizika kwakukulu, ndipo ndi koyenera kwa zigawo zomwe zimayenera kusintha kayendetsedwe kake ndi kupanikizika. Sikoyenera kwa sing'anga yokhala ndi mamasukidwe apamwamba komanso okhala ndi tinthu tating'onoting'ono, ndipo sikoyenera valavu yodzipatula.
5:Malangizo osankha vavu ya tambala
Valve ya pulagi ndi yoyenera pazochitika zomwe zimafuna kutsegula ndi kutseka mofulumira. Nthawi zambiri, si oyenera nthunzi ndi apamwamba kutentha TV, kutentha m'munsi ndi mkulu mamasukidwe akayendedwe TV, komanso TV ndi inaimitsidwa particles.
6:Malangizo osankha vavu ya butterfly
Vavu yagulugufe ndi yoyenera m'mimba mwake yayikulu (monga DN﹥600mm) ndi kutalika kwa kapangidwe kake, komanso nthawi zomwe kusintha koyenda komanso kutsegulira ndi kutseka mwachangu kumafunikira. Nthawi zambiri amagwiritsidwa ntchito ngati kutentha ≤
80 ℃, kuthamanga ≤ 1.0MPa madzi, mafuta, wothinikizidwa mpweya ndi TV zina; chifukwa cha kutayika kwakukulu kwa mavavu agulugufe poyerekeza ndi mavavu a pachipata ndi mavavu a mpira, mavavu agulugufe ndi oyenerera pamapaipi omwe ali ndi zofunikira zochepa zochepetsera kuthamanga.
7: Onani malangizo osankha ma valve
Ma valavu owunikira nthawi zambiri amakhala oyenera pa media zoyera, osati pazofalitsa zomwe zimakhala ndi tinthu tolimba komanso kukhuthala kwakukulu. Pamene ≤40mm, valavu yowunikira iyenera kugwiritsidwa ntchito (zongololedwa kuyika paipi yopingasa); pamene DN = 50 ~ 400mm, valavu yoyendera iyenera kugwiritsidwa ntchito (ikhoza kuikidwa pamapaipi onse opingasa ndi ofukula, monga Kuyika paipi yowongoka, njira yoyendetsera sing'anga iyenera kukhala kuchokera pansi mpaka pamwamba);
Pamene DN≥450mm, valavu yowunikira iyenera kugwiritsidwa ntchito; pamene DN = 100 ~ 400mm, valavu yoyang'ana yopyapyala ingagwiritsidwenso ntchito; swing check valve ikhoza kupangidwa kuti ikhale yogwira ntchito kwambiri, PN ikhoza kufika ku 42MPa, Ikhoza kugwiritsidwa ntchito pa sing'anga iliyonse yogwira ntchito ndi kutentha kulikonse kogwira ntchito malinga ndi zipangizo zosiyanasiyana za chipolopolo ndi zigawo zosindikizira.
Sing'anga ndi madzi, nthunzi, gasi, sing'anga zikuwononga, mafuta, mankhwala, etc. The ntchito kutentha osiyanasiyana sing'anga ndi pakati -196～800℃.
8:Malangizo osankha vavu ya diaphragm
Vavu ya diaphragm ndiyoyenera mafuta, madzi, acidic sing'anga ndi sing'anga yomwe ili ndi zolimba zoyimitsidwa zomwe kutentha kwake kumakhala kosakwana 200 ℃ ndipo kupanikizika kumakhala kosakwana 1.0MPa. Si oyenera zosungunulira organic ndi amphamvu oxidant sing'anga;
Mavavu a weir diaphragm ayenera kusankhidwa kuti azitha kubisala, ndipo mawonekedwe oyenda a mavavu a weir diaphragm ayenera kutchulidwa posankha mavavu akuda a diaphragm; zowongoka kupyola diaphragm mavavu ayenera kusankhidwa kwa viscous madzi, simenti slurry ndi sedimentary media; mavavu a diaphragm sayenera kugwiritsidwa ntchito popanga mapaipi kupatulapo zofunikira zenizeni za msewu ndi vacuum.
Funso losankha ma valve ndi yankho
1. Ndi zinthu zitatu ziti zomwe ziyenera kuganiziridwa posankha bungwe lokonzekera ntchito?
Zotulutsa za actuator ziyenera kukhala zazikulu kuposa kuchuluka kwa valve ndipo ziyenera kufananizidwa bwino.
Poyang'ana kuphatikiza koyenera, ndikofunikira kulingalira ngati kusiyana kovomerezeka kovomerezeka komwe kumanenedwa ndi valavu kumakwaniritsa zofunikira. Pamene kusiyana kwa kuthamanga kuli kwakukulu, mphamvu yosagwirizana pa spool iyenera kuwerengedwa.
M'pofunika kuganizira ngati liwiro la kuyankha kwa actuator likukwaniritsa zofunikira za ndondomekoyi, makamaka magetsi oyendetsa magetsi.
2. Poyerekeza ndi ma pneumatic actuators, ndi zinthu ziti zomwe zimapangidwira magetsi, ndipo ndi mitundu yanji yotulutsa yomwe ilipo?
Gwero lamagetsi lamagetsi ndi mphamvu yamagetsi, yomwe ndi yosavuta komanso yosavuta, yokhala ndi kuthamanga kwambiri, torque ndi kukhazikika. Koma kapangidwe kake ndi kovutirapo ndipo kudalirika kwake ndi koyipa. Ndiwokwera mtengo kuposa pneumatic muzinthu zazing'ono ndi zapakatikati. Amagwiritsidwa ntchito nthawi zambiri pamene kulibe gasi kapena kumene kuphulika kosaphulika ndi kutetezedwa kwa malawi sikufunikira. Makina opangira magetsi ali ndi mitundu itatu yotulutsa: sitiroko ya angular, sitiroko ya mzere, ndi kutembenuka kosiyanasiyana.
3. N'chifukwa chiyani kusiyana kwa kuthamanga kwa kotala-kutembenuka kuli kwakukulu?
Kusiyanitsa kwapakati pa kotala-kutembenuka kwa valve ndikokulirapo chifukwa mphamvu yomwe imapangidwa ndi sing'anga pamtunda wa valve kapena mbale ya valve imapanga torque yaing'ono kwambiri pamtunda wozungulira, kotero imatha kupirira kusiyana kwakukulu. Ma valve a butterfly ndi ma valve a mpira ndi omwe amapezeka kwambiri pa quarter-turn valves.
4. Ndi mavavu ati omwe ayenera kusankhidwa kuti ayendetse? kusankha?
Mavavu olamulira osindikizira amodzi monga ma valve okhala ndi mpando umodzi, ma valve othamanga kwambiri, ndi ma valve osindikizira amodzi opanda mabowo ayenera kuyenda. Pali zabwino ndi zoyipa kuti ziziyenda motseguka ndikuyenda kutsekedwa. Valavu yamtundu wotuluka-yotseguka imagwira ntchito mokhazikika, koma ntchito yodziyeretsa yokha ndi ntchito yosindikiza imakhala yosauka, ndipo moyo ndi waufupi; valavu yamtundu wothamanga imakhala ndi moyo wautali, ntchito yodziyeretsa yokha ndi ntchito yabwino yosindikizira, koma kukhazikika kumakhala kosauka pamene tsinde la tsinde liri laling'ono kusiyana ndi chigawo chapakati cha valve.
Ma valve okhala ndi mpando umodzi, ma valve othamanga ang'onoang'ono, ndi ma valve osindikizira amodzi nthawi zambiri amasankhidwa kuti ayendetse otseguka, ndi kutuluka kumatsekedwa pamene pali zofunikira zowonongeka kapena zodziyeretsa. Mitundu yamitundu iwiri yotsegulira mwachangu mawonekedwe owongolera imasankha mtundu wotsekedwa wotuluka.
5. Kuphatikiza pa mavavu okhala ndi mpando umodzi ndi mipando iwiri ndi mavavu a manja, ndi ma valve ena ati omwe ali ndi ntchito zolamulira?
Ma valve a diaphragm, ma valve agulugufe, ma valve opangidwa ndi O (makamaka odulidwa), ma valve opangidwa ndi V (chiŵerengero chachikulu cha kusintha ndi kumeta ubweya), ndi ma eccentric rotary valves onse ndi ma valve omwe ali ndi ntchito zosintha.
6. Chifukwa chiyani kusankha zitsanzo kuli kofunika kwambiri kuposa kuwerengera?
Poyerekeza kuwerengera ndi kusankha, kusankha ndikofunikira kwambiri komanso kovuta kwambiri. Chifukwa kuwerengera ndi njira yosavuta yowerengera, sikumangokhalira kulondola kwa ndondomekoyi, koma kulondola kwa magawo omwe apatsidwa.
Kusankhidwa kumaphatikizapo zambiri, ndipo kusasamala pang'ono kudzatsogolera kusankhidwa kosayenera, zomwe sizimangowononga anthu, chuma ndi chuma, komanso kugwiritsa ntchito kosakwanira, zomwe zimabweretsa mavuto angapo ogwiritsira ntchito, monga kudalirika, moyo wautali, ndi ntchito. Quality etc.
7. Nchifukwa chiyani valavu yosindikizidwa kawiri singagwiritsidwe ntchito ngati valavu yotseka?
Ubwino wa valavu yokhala ndi mipando iwiri ndi mphamvu yoyendetsera mphamvu, yomwe imalola kusiyana kwakukulu, koma kuipa kwake kwakukulu ndikuti malo awiri osindikizira sangakhale ogwirizana nthawi imodzi, zomwe zimapangitsa kuti pakhale kutaya kwakukulu.
Ngati agwiritsidwa ntchito mwachisawawa komanso mokakamiza kuti achepetse nthawi, zotsatira zake mwachiwonekere sizabwino. Ngakhale zosintha zambiri (monga valavu yosindikizidwa kawiri) zipangidwira izo, sizoyenera.
8. N'chifukwa chiyani valavu yokhala ndi mipando iwiri imakhala yosavuta kugwedezeka pamene ikugwira ntchito ndi kabowo kakang'ono?
Kwa pachimake chimodzi, pamene sing'anga ikutuluka mtundu wotseguka, kukhazikika kwa valve ndikwabwino; pamene sing'anga ndi otaya chatsekedwa mtundu, ndi valavu bata ndi osauka. Valavu yokhala ndi mipando iwiri imakhala ndi ma spools awiri, spool yapansi imayenda yotsekedwa, ndipo spool yapamwamba imakhala yotseguka.
Mwa njira iyi, pogwira ntchito ndi kutsegula pang'ono, phokoso lotsekedwa lotsekedwa likhoza kuyambitsa kugwedezeka kwa valve, chifukwa chake valavu yokhala ndi mipando iwiri silingagwiritsidwe ntchito potsegula pang'ono.
9. Kodi valavu yowongoka yokhala ndi mpando umodzi ndi yotani? Amagwiritsidwa ntchito kuti?
Kuthamanga kwamadzi kumakhala kochepa, chifukwa pali chigawo chimodzi chokha cha valve, n'zosavuta kutsimikizira kusindikiza. Mulingo woyezetsa wotuluka ndi 0.01% KV, ndipo mapangidwe enanso angagwiritsidwe ntchito ngati valavu yotseka.
Kuthamanga kovomerezeka ndikochepa, ndipo kukankhirako kumakhala kwakukulu chifukwa cha mphamvu yosalinganika. Vavu △P ya DN100 ndi 120KPa yokha.
Mphamvu yozungulira ndi yaying'ono. KV ya DN100 ndi 120 yokha. Imagwiritsidwa ntchito nthawi zambiri pamene kutayikira kuli kochepa ndipo kusiyana kwapakati sikuli kwakukulu.
10. Kodi valavu yowongoka yokhala ndi mipando iwiri ndi yotani? Amagwiritsidwa ntchito kuti?
Kusiyana kovomerezeka kovomerezeka ndi kwakukulu, chifukwa kumatha kuthetsa mphamvu zambiri zopanda malire. DN100 vavu △P ndi 280KPa.
Kuthamanga kwakukulu. KV ya DN100 ndi 160.
Kutayikirako ndi kwakukulu chifukwa ma spools awiri sangathe kusindikizidwa nthawi imodzi. Mulingo woyezetsa wotuluka ndi 0.1% KV, womwe ndi nthawi 10 kuposa valve yapampando umodzi. Valavu yowongoka yokhala ndi mipando iwiri imagwiritsidwa ntchito makamaka nthawi zomwe zimakhala ndi kusiyana kwakukulu komanso zofunikira zotsika.
11. Nchifukwa chiyani ntchito yotsutsa-kutsekereza ya valve yowongolera yowongoka imakhala yosauka, ndipo valavu ya angle-stroke imakhala ndi ntchito yabwino yoletsa kutsekereza?
Spool ya valavu yowongoka ndi yowongoka, ndipo sing'anga imalowa ndi kutuluka mopingasa. Njira yotuluka mu valavu imangotembenuka ndikubwerera, zomwe zimapangitsa kuti valavu ikhale yovuta kwambiri (mawonekedwewo ali ngati mawonekedwe a "S" otembenuzidwa). Mwanjira iyi, pali madera ambiri akufa, omwe amapereka malo kwa mpweya wa sing'anga, ndipo ngati zinthu zikuyenda motere, zimayambitsa kutsekeka.
Mayendedwe a throttling ya quarter-turn valve ndi njira yopingasa. Sing'anga imayenda mkati ndi kunja mopingasa, zomwe zimakhala zosavuta kuchotsa zonyansa. Panthawi imodzimodziyo, njira yothamanga ndi yophweka, ndipo malo a mpweya wapakati ndi ochepa, choncho valve yozungulira kotala imakhala ndi ntchito yabwino yoletsa kutsekereza.
12. Ndi zinthu ziti zomwe ndiyenera kugwiritsa ntchito choyika valavu?
Kumene kukangana kuli kwakukulu ndi kuyika bwino kumafunika. Mwachitsanzo, kutentha kwapamwamba ndi mavavu otsika kutentha kapena ma valve olamulira okhala ndi graphite yosinthasintha;
Kuchita pang'onopang'ono kumafunika kuonjezera liwiro la kuyankha kwa valve yolamulira. Mwachitsanzo, dongosolo kusintha kutentha, mlingo madzi, kusanthula ndi magawo ena.
M'pofunika kuonjezera linanena bungwe mphamvu ndi kudula mphamvu ya actuator. Mwachitsanzo, valavu imodzi yokhala ndi DN≥25, valavu yokhala ndi mipando iwiri yokhala ndi DN> 100. Kuthamanga kukatsika kumapeto kwa valavu △P> 1MPa kapena kukakamiza kolowera P1> 10MPa.
Pogwiritsa ntchito njira zoyendetsera magawo osiyanasiyana komanso ma valve owongolera, nthawi zina pamafunika kusintha njira zotsegulira mpweya komanso zotsekera mpweya.
Ndikofunikira kusintha mawonekedwe otaya a valve yowongolera.
13. Kodi masitepe asanu ndi awiri otani kuti adziwe kukula kwa valve yowongolera?
Dziwani zowerengera zowerengera-Qmax, Qmin
Tsimikizirani kuwerengera kwapanikizidwe-kusankha kukana chiŵerengero cha S mtengo malinga ndi mawonekedwe a dongosolo, ndiyeno dziwani kusiyana kwa kuthamanga kowerengedwa (pamene valavu yatsegulidwa kwathunthu);
Werezerani kuchuluka kwa ma flow-- sankhani tchati kapena pulogalamu yoyenera yowerengera kuti mupeze max ndi min ya KV;
Kusankhidwa kwa mtengo wa KV——Malinga ndi mtengo wa KV wochulukira pamndandanda wazinthu zosankhidwa, KV yomwe ili pafupi kwambiri ndi giya yoyamba imagwiritsiridwa ntchito kupeza mtundu wosankha;
Kutsegula cheke kuwerengera-pamene Qmax ikufunika, ≯90% kutsegulidwa kwa valve; pamene Qmin ndi ≮10% kutsegulidwa kwa valve;
Kuwerengera kwenikweni kosinthika kosinthika——zofunikira zonse ziyenera kukhala ≮10; Zofunikira za Ractual＞R
Chiyembekezo chatsimikiziridwa-ngati sichili oyenerera, sankhaninso mtengo wa KV ndikutsimikiziranso.
14. N'chifukwa chiyani valavu ya manja imalowa m'malo mwa mpando umodzi ndi mipando iwiri koma osapeza zomwe mukufuna?
Vavu ya manja yomwe idatuluka m'ma 1960 idagwiritsidwa ntchito kwambiri kunyumba ndi kunja m'ma 1970. M'mafakitale a petrochemical omwe adayambitsidwa m'ma 1980s, mavavu amanja adapanga gawo lalikulu. Pa nthawiyo, anthu ambiri ankakhulupirira kuti mavavu amatha kusintha mavavu amodzi kapena awiri. Vavu yapampando idakhala chinthu cham'badwo wachiwiri.
Mpaka pano, izi siziri choncho. Ma valve okhala ndi mpando umodzi, ma valve okhala ndi mipando iwiri, ndi mavavu a manja onse amagwiritsidwa ntchito mofanana. Izi ndichifukwa choti valavu ya manja imangowonjezera mawonekedwe a throttling, kukhazikika ndi kukonza bwino kuposa valavu imodzi yokha, koma kulemera kwake, zizindikiro zotsutsa-kutsekereza ndi zowonongeka zimagwirizana ndi ma valve okhala ndi mpando umodzi ndi awiri, angalowe bwanji m'malo amodzi ndi awiri. mavavu mpando Nsalu za ubweya? Choncho, angagwiritsidwe ntchito pamodzi.
15. Kodi nchifukwa ninji chisindikizo cholimba chiyenera kugwiritsidwa ntchito mmene tingathere potseka mavavu?
Kutuluka kwa valve yotseka kumakhala kochepa kwambiri. Kutuluka kwa valve yotsekedwa mofewa ndikotsika kwambiri. Zoonadi, zotsatira zotseka ndi zabwino, koma sizimavala komanso zimakhala zodalirika. Tikayang'ana pamiyezo iwiri ya kutayikira kwakung'ono ndi kusindikiza kodalirika, kusindikiza kofewa sikuli bwino ngati kusindikiza kolimba.
Mwachitsanzo, valavu yogwiritsira ntchito ultra-light regulating valve, yosindikizidwa ndi yodzaza ndi chitetezo cha alloy chosavala, imakhala yodalirika kwambiri, ndipo imakhala ndi chiwerengero cha 10-7, chomwe chingathe kukwaniritsa zofunikira za valve yotseka.
16. N'chifukwa chiyani tsinde la valve yowongolera sitiroko ndi yopyapyala?
Zimakhudzanso mfundo yosavuta yamakina: kugwedezeka kwakukulu komanso kukangana kochepa. Tsinde la valve ya valve yowongoka imasunthira mmwamba ndi pansi, ndipo kulongedza kumakanikizidwa pang'ono, kumanyamula tsinde la valve mwamphamvu kwambiri, zomwe zimapangitsa kusiyana kwakukulu kobwerera.
Pachifukwa ichi, tsinde la valve limapangidwa kuti likhale laling'ono kwambiri, ndipo kulongedzako kumagwiritsa ntchito PTFE kulongedza ndi kagawo kakang'ono kameneka kuti achepetse kumbuyo, koma vuto ndilokuti tsinde la valve ndilochepa, lomwe ndi losavuta kupindika, ndi kulongedza. moyo ndi waufupi.
Njira yabwino yothetsera vutoli ndikugwiritsa ntchito tsinde la valve yoyendayenda, ndiko kuti, valve yozungulira kotala. Tsinde lake ndi lalitali 2 mpaka 3 kuposa tsinde la valve yowongoka. Imagwiritsanso ntchito kulongedza kwa graphite kwa moyo wautali komanso kuuma kwa tsinde. Zabwino, moyo wolongedza ndi wautali, koma torque yolimbana ndi yaying'ono ndipo kubweza kwake kumakhala kochepa.
Kodi mukufuna kuti anthu ambiri adziwe zomwe mwakumana nazo kuntchito? Ngati mukugwira ntchito yaukadaulo wa zida, ndikudziwa za kukonza ma valve, ndi zina zambiri, mutha kulumikizana nafe, mwina zomwe mwakumana nazo komanso zomwe mwakumana nazo Zingathandize anthu ambiri.
Nthawi yotumiza: Nov-27-2021