Vavu ngati imodzi mwa zida zofunika kwambiri pakupanga mafakitale, kuyambira pakusankhidwa mpaka kukonzanso kumatha kukumana ndi mavuto ambiri, apa Xiaobian adasonkhanitsa mavuto omwe wamba, onani ngati angakuthandizeni?
1. Kodi ndi zinthu zitatu ziti zomwe ziyenera kuganiziridwa posankha actuator?
(1) Zotsatira za actuator ziyenera kukhala zazikulu kuposa katundu wa valve, ndipo ziyenera kugwirizana bwino.
(2) Poyang'ana kusakaniza koyenera, m'pofunika kulingalira ngati kusiyana kovomerezeka kovomerezeka komwe kumatchulidwa ndi valve kumakwaniritsa zofunikira. Pamene kusiyana kwa kuthamanga kuli kwakukulu, mphamvu yosagwirizana pazitsulo za valve iyenera kuwerengedwa.
(3) M'pofunika kuganizira ngati liwiro la kuyankha kwa actuator likukwaniritsa zofunikira za ntchito ya ndondomeko, makamaka magetsi oyendetsa magetsi.
2, Poyerekeza ndi pneumatic actuator, ndi mikhalidwe yotani ndi mitundu yotulutsa yamagetsi amagetsi?
Gwero lamagetsi lamagetsi ndi mphamvu yamagetsi, yosavuta komanso yabwino, yokhala ndi kukakamiza kwakukulu, torque ndi kuuma. Koma kapangidwe kake ndi kovutirapo ndipo kudalirika kwake ndi koyipa. Ndiwokwera mtengo kuposa pneumatic kukula kochepa ndi kakang'ono. Amagwiritsidwa ntchito nthawi zambiri popanda gwero la gasi kapena osaphulika komanso osawotcha.
Makina opangira magetsi ali ndi mitundu itatu yotulutsa: sitiroko ya angular, sitiroko yowongoka ndi kuzungulira kosiyanasiyana.
3, Chifukwa chiyani kusiyana kwapakati kwapang'onopang'ono kwa valavu yamakona kuli kokulirapo?
Kusiyanitsa kwakukulu kwapang'onopang'ono kwa valve stroke ndi chifukwa mphamvu yomwe imapangidwa ndi sing'anga pachimake cha valve kapena mbale ya valve imakhala ndi torque yaying'ono pa shaft yozungulira, kotero imatha kupirira kusiyana kwakukulu. Mavavu a butterfly ndi valavu ya mpira ndi ma valve omwe amapezeka kwambiri.
4. Ndi mavavu ati omwe amafunikira kusankha kolowera? Kodi kusankha?
Kwa ma valve osindikizira amodzi, monga valavu ya mpando umodzi, valavu yothamanga kwambiri ndi valavu imodzi yosindikizira yopanda dzenje, njira yoyendetsera iyenera kusankhidwa.
Kutsegula ndi kutseka kwa madzi kumakhala ndi ubwino ndi kuipa kwawo. Valavu yotseguka yotuluka imagwira ntchito mokhazikika, koma ntchito yake yodzitchinjiriza yokha ndi kusindikiza kwake kumakhala koyipa, ndipo moyo wake wautumiki ndi waufupi; Valavu yotsekedwa yothamanga imakhala ndi moyo wautali wautumiki, ntchito yabwino yodziyeretsa yokha ndi ntchito yosindikiza, koma kukhazikika kumakhala kosauka pamene tsinde la tsinde liri locheperapo la spool.
Valavu yapampando umodzi, valavu yaing'ono yothamanga ndi valavu imodzi yosindikizira nthawi zambiri imayenda, ndipo kutuluka kumatha kusankhidwa pamene kukwapula kuli koopsa kapena pakufunika kudziyeretsa. Ma valve awiri otsegulira mwachangu ndi amtundu wosankha wotseka.
5, Kuwonjezera pa valavu yampando umodzi, valavu yokhala ndi mipando iwiri ndi valavu ya manja, ndi ma valve ena ati omwe ali ndi ntchito yolamulira?
Valavu ya diaphragm, valavu ya butterfly, valve yamtundu wa O (makamaka yodulidwa), valve yamtundu wa V (chiŵerengero chachikulu cha malamulo ndi ntchito yometa ubweya) ndi eccentric rotary valve ndi ma valve onse omwe ali ndi ntchito yolamulira.
6, Chifukwa chiyani kusankha ndikofunikira kuposa kuwerengera
Poyerekeza ndi kuwerengera ndi kusankha, kusankha ndikofunikira kwambiri komanso kovuta. Chifukwa kuwerengera ndi njira yosavuta yowerengera, sizitengera kulondola kwa ndondomeko yokha, koma kulondola kwa magawo omwe apatsidwa.
Kusankhidwa kwa mtundu kumaphatikizapo zambiri. Kusasamala pang'ono kudzatsogolera ku kusankha kosayenera kwa mtundu, zomwe sizimangowononga anthu, chuma ndi chuma, komanso kumabweretsa mavuto ena ogwiritsira ntchito, monga kudalirika, moyo wautumiki ndi khalidwe la ntchito.
7. Chifukwa chiyani valavu yosindikizira iwiri siyingagwiritsidwe ntchito ngati valavu yotseka?
Ubwino wa valavu yapampando wapawiri ndi mphamvu yoyendetsera mphamvu, kulola kusiyana kwakukulu, ndipo kuipa kwake kwakukulu ndikuti malo awiri osindikizira sangakhale ogwirizana nthawi imodzi, zomwe zimapangitsa kutayikira kwakukulu.
Ngati agwiritsidwa ntchito mwachisawawa komanso mokakamiza pakudula, zotsatira zake sizowoneka bwino. Ngakhale zitakhala kuti zasinthidwa zambiri (monga valavu yosindikizira iwiri), sizofunika.
8, N'chifukwa chiyani valavu yapampando iwiri ndi yosavuta kugwedeza pamene ikugwira ntchito ndi kutsegula pang'ono?
Kwa pachimake chimodzi, sing'anga ikatseguka, valavu imakhala yokhazikika bwino; Pamene sing'anga imatsekedwa, kukhazikika kwa valve kumakhala kosauka. Valavu yokhala ndi mipando iwiri imakhala ndi ma valve awiri, chigawo chapansi cha valve chili pamalo otsekedwa, ndipo chapamwamba cha valve chili pamalo otseguka.
Mwa njira iyi, pogwira ntchito potsegula pang'ono, kutuluka kwa spool kutsekedwa kumakhala kosavuta kuchititsa kugwedezeka kwa valve, chifukwa chake valavu yokhala ndi mipando iwiri singagwiritsidwe ntchito potsegula pang'ono.
9, Kodi mikhalidwe yowongoka kudzera pampando umodzi wolamulira valavu ndi chiyani? Amagwiritsidwa ntchito kuti?
(1) Kutulutsa pang'ono, chifukwa pali spool imodzi yokha, yosavuta kutsimikizira kusindikiza. Kutulutsa kokhazikika ndi 0.01% kV, komwe kungagwiritsidwe ntchito ngati valavu yotseka popanga zina.
(2) Kusiyana kovomerezeka kovomerezeka ndikochepa ndipo kukankhirako kumakhala kwakukulu chifukwa cha mphamvu yosagwirizana. Vavu △ P ya DN 100 ndi 120 kPa yokha.
(3) Mphamvu yozungulira ndi yochepa. KV ya DN 100 ndi 120 yokha. Imagwiritsidwa ntchito nthawi zambiri pakatuluka pang'ono komanso kusiyana kwapang'onopang'ono.
10, Kodi makhalidwe molunjika kudzera awiri mpando valavu ulamuliro? Amagwiritsidwa ntchito kuti?
(1) Kusiyana kovomerezeka kovomerezeka ndi kwakukulu, chifukwa kumatha kulimbana ndi mphamvu zambiri zopanda malire. Vavu △ P ya DN 100 ndi 280 kPa.
(2) Kuthamanga kwakukulu. KV ya DN 100 ndi 160.
(3) Kutayikirako ndi kwakukulu chifukwa ma valve awiri sangathe kusindikizidwa nthawi imodzi. Kutulutsa kokhazikika ndi 0.1% kV, yomwe ndi nthawi 10 ya vavu ya mpando umodzi. Kuwongoka kudzera pamipando iwiri yolamulira valavu imagwiritsidwa ntchito makamaka pakusiyana kwakukulu, zofunikira zotayikira sizovuta nthawi.
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Pakatikati pa valve ya valavu yowongoka ndi yowongoka, pomwe sing'anga imalowa ndi kutuluka mopingasa. Njira yodutsa muzitsulo za valve iyenera kutembenuka mozondoka, zomwe zimapangitsa kuyenda kwa valve kukhala kovuta kwambiri (monga mawonekedwe otembenuzidwa "s"). Mwa njira iyi, pali madera ambiri akufa, omwe amapereka malo kwa mvula yapakati. M'kupita kwa nthawi, zingayambitse kutsekeka.
Mayendedwe opindika a valve stroke ndi njira yopingasa. Sing'angayo imalowa ndi kutuluka mopingasa, zomwe zimakhala zosavuta kuchotsa sing'anga yodetsedwa. Nthawi yomweyo, njira yolowera ndi yophweka, ndipo danga la mpweya wapakati ndi laling'ono, kotero kuti valve stroke ili ndi ntchito yabwino yoletsa kutsekereza.
12, Kodi zoyika ma valve ziyenera kugwiritsidwa ntchito pati?
(1) Pankhani ya kukangana kwakukulu komanso kuyika bwino. Mwachitsanzo, kutentha kwapamwamba ndi valavu yochepetsera kutentha kapena valavu yolamulira yokhala ndi graphite yosinthasintha;
(2) Pang'onopang'ono ndondomeko iyenera kupititsa patsogolo liwiro la kuyankha kwa valve yolamulira. Mwachitsanzo, kutentha, mlingo wamadzimadzi, kusanthula ndi magawo ena a dongosolo la malamulo.
(3) Ndikofunikira kukonza mphamvu yotulutsa ndi mphamvu yodula ya actuator. Mwachitsanzo, valavu imodzi yokhala ndi DN ≥ 25 ndi valavu yokhala ndi mipando iwiri yokhala ndi DN > 100. Pamene kupanikizika kumatsika kumapeto kwa valve △ P (＞ 1MPa) kapena kulowetsa mpweya P1 ＞ 10MPa.
(4) Pogwira ntchito yogawanitsa kagawo kakang'ono ndi valavu yolamulira, nthawi zina zimakhala zofunikira kusintha mawonekedwe a mpweya wotsegula ndi kutseka kwa mpweya (5) Ndikofunikira kusintha maonekedwe a kayendedwe ka valve.
Nthawi yotumiza: Jun-04-2021
