Vavu yoyang'anira momwe mungasankhire woyesa wanzeru wamalasha woyeserera pogwiritsa ntchito valavu yowongolera, kuti akwaniritse kukakamizidwa ndi kuyenda.

Vavu yoyang'anira momwe mungasankhire woyesa wanzeru wamalasha woyeserera pogwiritsa ntchito valavu yowongolera, kuti akwaniritse kukakamizidwa ndi kuyenda.

Regulator ndi ma terminal actuators mu mafakitale ndondomeko kulamulira machitidwe, mafakitale mosalekeza kupanga ndondomeko basi kulamulira dongosolo ambiri ayenera kugwiritsa ntchito chowongolera kulamulira ndondomeko kupanga magawo osiyanasiyana ndondomeko, kukwaniritsa magawo madzimadzi monga kuthamanga, kutentha, otaya mlingo. ndi mlingo wamadzimadzi wa kusintha, umadziwika kuti "manja ndi mapazi" popanga mafakitale opanga makina. Ubwino wa ntchito yake ukuwonekera mwachindunji mu khalidwe la kayendetsedwe ka kayendetsedwe kake. Monga chinthu chomaliza pakuwongolera njira, anthu amamvetsetsa kufunikira kwake kuposa kale. Kuwongolera ma valve ndi abwino kapena oyipa, kuwonjezera pa khalidwe lazogulitsa ndi ogwiritsa ntchito ndikuyika bwino, kugwiritsa ntchito ndi kukonza, kuwerengera kolondola ndi kusankha ndikofunikira kwambiri. Chifukwa cha zolakwika za mawerengedwe ndi kusankha, dongosolo limayenda mosakhazikika, ndipo zina sizingagwiritsidwe ntchito mu zitsanzo zambiri. Choncho, ogwiritsa ntchito ndi okonza dongosolo kuti azindikire bwino kufunika koyendetsa valavu m'munda, ayenera kuchititsa chidwi chokwanira pakusankhidwa kwa valve yoyendetsa.
Mfundo yaikulu yoyendetsera kusankha kwa valve ndi: pansi pa maziko a kukumana ndi ntchito yogwiritsira ntchito, valve yosankhidwa yosankhidwa iyenera kukhala yophweka, ntchito yodalirika, mtengo wotsika, moyo wautali, kusamalira bwino ndi zina zotero. Zotsatirazi zikuyang'ana pa kusankha ndi kulamulira mtundu wa valve
Kusankha zomata.
1 kusankha mtundu wa vavu wowongolera
Regulator classification njira zambiri, zoweta zapakhomo ndi zapadziko lonse lapansi panjira yamagulu nthawi zambiri zimatengera kapangidwe kake, mfundo ndi magawo ogwirira ntchito, mitundu 9 yayikulu, yomwe ndi valavu yowongolera yokhala ndi mpando umodzi, yowongolera okhala ndi mipando iwiri, valavu ya manja, valavu ya ngodya, valavu ya njira zitatu, valavu ya diaphragm, valavu ya butterfly, valavu ya mpira ndi eccentric rotary valve, zinthu zisanu ndi zinayi ndizofunika, zomwe zimagwiritsidwa ntchito, Zomwe zimatchedwanso mankhwala okhazikika, zina zimachokera ku kuphatikiza kwa ntchito yowonjezera, yotchedwa mankhwala apadera.
1.1 Makhalidwe ndi kusankha kolondola kwa valavu yoyendetsera mtundu wokhazikika 1.1.1 Molunjika kudzera pampando umodzi wowongolera valavu
Kuwongoka kudzera pampando umodzi wowongolera valavu ndi spool ndi mpando, zosavuta kukwaniritsa kusindikiza kolimba, chitsulo ndi chitsulo chosindikizira cholimba, kapena zitsulo ndi PTFE kapena zipangizo zina zophatikizana zofewa zofewa, kutayikira kwa 0.01% C (C amavotera coefficient yotuluka), kulola kusiyana kwapang'onopang'ono, mphamvu yaing'ono yothamanga, Mwachitsanzo, DN100 mpando umodzi woyendetsa valavu umalola kuthamanga kosiyana * 120kPa, mphamvu yothamanga * 100. Njira yothamanga ndi yovuta, yophweka, yoyenera pa zofunikira zowonongeka zowonongeka, kusiyana kwa kuthamanga kwa ntchito kumakhala kochepa, koyera. zochitika zapakatikati, koma mawonekedwe ang'onoang'ono a valve yowongolera (DN1 / 2, 3/4, 20) angagwiritsidwenso ntchito panthawi ya kusiyana kwakukulu, amagwiritsidwa ntchito ngati imodzi mwa valve yoyendetsera bwino kwambiri, ikapangidwanso, ikhoza kukhala amagwiritsidwa ntchito ngati valve yodula. Maonekedwe a spool amatsimikizira makhalidwe othamanga. Imataya makhalidwe ake oyambirira itatsukidwa. Kusintha spool kumatha kusintha mawonekedwe otaya. Komabe, kukankhira kwa sing'anga yamadzimadzi pa spool ndi yayikulu, ndiko kuti, mphamvu yosagwirizana ndi yayikulu, ndipo chowongolera chokhala ndi mphamvu yayikulu chikufunika. Choncho, pogwiritsira ntchito kusiyana kwa kuthamanga kwakukulu ndi caliber yaikulu, sikoyenera kugwiritsa ntchito mtundu uwu wa valve yoyendetsera. Sankhani valavu iyi iyenera kuyang'ana kwambiri kuwunika kwapakati kuti mupewe kutsegulidwa.
1.1.2 Molunjika kudzera mu valavu yowongolera mipando iwiri
Valavu yowongoka yokhala ndi mipando iwiri yokhala ndi ma spool awiri ndi mipando iwiri ya valve. Chifukwa kukwera kwa spool kumtunda ndi kutsika kwa spool kumunsi kumakhala koyenera, mphamvu yosalinganika ya spool yonse ndi yaying'ono ndipo kusiyana kovomerezeka ndi kwakukulu. Mwachitsanzo, valavu yoyendetsa mipando iwiri ya DN100 imalola kusiyana kwapakati pa 280kPa, ndipo mphamvu yothamanga ndi yaikulu. Valavu yoyendetsera mipando iwiri imatha kuyenda kudzera mumadzimadzi ochulukirapo, mawonekedwe omwewo okhala ndi mipando iwiri yowongolera valavu kuposa mpando umodzi wowongolera valavu yoyenda pafupifupi 20% ~ 50%. Mwachitsanzo, mphamvu yothamanga ya DN100 yokhala ndi mipando iwiri ndi 160. Choncho, kuti apeze mphamvu yothamanga yofanana, woyang'anira mipando iwiri akhoza kusankha chowongolera chaching'ono. Vavu yoyang'anira mipando iwiri pogwiritsa ntchito chiwongolero chapamwamba ndi chapansi, chifukwa chake, valavu yathupi ndi valavu yobwerera kumbuyo ndiyosavuta, ndiye kuti, spool yokha ndi mpando womwe umayikidwa kumbuyo ungasinthe valavu yathupi kukhala valavu ya reverse body, kapena reverse. valavu ya thupi ku valavu yabwino ya thupi, popanda kufunika kosintha mtundu wa zochita zabwino kapena zoipa za actuator. Valavu yoyendetsera mipando iwiri, spool singatseke nthawi yomweyo, kutayikira kuli kwakukulu, kutayikira kokhazikika ndi 0.1% C (C ndiye choyezera chotuluka); Njira yothamanga ndi yovuta, ndipo si yoyenera kugwiritsira ntchito kuthamanga kwambiri, chifukwa mumtundu woterewu, valavu imaphwanyidwa ndi kuthamanga kwamadzimadzi ndizovuta kwambiri, komanso zosavuta kupanga ndi kung'anima, ndikuwonjezera kuphulika kwa thupi la valve, Komanso si oyenera kulamulira fibrous TV ndi mkulu mamasukidwe akayendedwe madzimadzi.
1.1.3 Valavu yowongolera manja
Valavu yowongolera manja imadziwikanso kuti valavu ya khola, valavu yake yamkati yogwiritsa ntchito spool ndi khola la valavu (sleeve), manja amatha kuwongoka kudzera pampando umodzi wowongolera valavu, amathanso kukhala valavu yoyang'anira mipando iwiri kapena valavu yoyang'anira Angle, ndi zina zotero. chidindo chimodzi, chisindikizo chapawiri zomanga ziwiri, choyambiriracho ndi chofanana ndi valavu yoyendetsera mpando umodzi, yoyenera pampando umodzi wowongolera ma valve; Yotsirizirayi ndi yofanana ndi valavu yoyang'anira mipando iwiri, yoyenera pazochitika za valve zoyendetsa mipando iwiri. Kuphatikiza apo, ilinso ndi kukhazikika kwabwino, kutsitsa kosavuta ndi kutsitsa, kukonza kosavuta, kumakhala ndi mawonekedwe ochepetsa phokoso komanso kuchepetsa kukhudzidwa kwa cavitation, koma mtengo wa valavu imodzi ndi iwiri yokhala ndi mipando yokwera mtengo 50% ~ 200%, imafunikiranso chapadera. chomangira gasket, ntchito yake imakhalanso yopambana, yotsika kwa valavu yolamulira mpando umodzi ndi iwiri, Komabe, valavu iyi sayenera kugwiritsidwa ntchito pazinthu zonyansa komanso zosavuta kuzimitsa, kugwedeza ndi kufalitsa.
1.1.4 Vavu yoyang'anira ngodya
Angle regulating valve ndi mpando umodzi wowongolera valavu yokhala ndi mawonekedwe apadera a thupi, oyenerera chitoliro ndi zochitika zamadzimadzi, ndikuwongoka m'thupi kuti asinthe Angle (yofanana ndi chigongono) thupi, kugunda, kukakamiza kumakhala kofanana. pampando umodzi wowongolera valve. Sungani valavu yowongolera mpando umodzi, kusiyana kochepa kovomerezeka kovomerezeka. Kuonjezera apo, chifukwa cha njira yake yosavuta yothamanga imakhala ndi "kudziyeretsa" ntchito, ingagwiritsidwe ntchito pazinthu zonyansa, komanso zimatha kupititsa patsogolo kuteteza kutsekereza valavu ya Angle, yoyenera pazikhalidwe zogwirira ntchito zomwe zili ndi tinthu tating'onoting'ono, makamaka pakuyika. malo ndi ochepa, makamaka oyenera zochitika.
1.1.5 Valavu yowongolera njira zitatu
Valavu yoyendetsera njira zitatu imagwiritsa ntchito spool yokha kuti iwatsogolere, ndipo chowongoleracho chiyenera kusinthidwa pamene kutsegula kwa mpweya ndi kutseka kwa mpweya kumasinthidwa. Tiyenera kuzindikira kuti tanthauzo la kutseguka kwake kwa mpweya ndi kutseka kwa mpweya sikufanana ndi ma valve ena olamulira. Kutsegula kwake kwa mpweya ndi kutseka kwa gasi kuyenera kumveka bwino kuti ndi njira yotani, yomwe ili yopingasa kapena yoyima. Ili ndi mayendedwe atatu, imatha kusintha ma valve awiri owongoka kudzera pampando umodzi wowongolera ndikuwongolera magulu awiri akuyenda ndi kusiyana kwa kutentha ≤150 ℃ nthawi, pomwe DN≤80mm, valavu yolumikizira ingagwiritsidwe ntchito pazochitika za shunt.
1.1.6 valavu yowongolera diaphragm
Vavu yoyang'anira ma diaphragm yokhala ndi ma diaphragm osachita dzimbiri komanso yokhala ndi zinthu zosagwirizana ndi dzimbiri, njira yosavuta yolowera, yoyenera pakatikati yodetsedwa komanso yofooka yowononga nthawi ziwiri. Ndi imodzi mwa ma valve oyendetsa oyambirira, chifukwa cha kutuluka kwa pafupifupi kutseguka kwachangu, khalidwe la malamulo ndi losauka, ndipo limakhudzidwa ndi diaphragm ndi zinthu zopangira nsalu, sizingagwiritsidwe ntchito pa kutentha kwakukulu ndi kupanikizika kwapamwamba, ntchito yaikulu. kupanikizika ndi zosakwana 1.6mpa, kutentha ntchito ndi zosakwana 150 ℃, pamodzi ndi diaphragm n'zosavuta kuwonongeka, moyo waufupi wa zophophonya, tsopano nthawi si kwambiri.
1.1.7 valavu ya butterfly
Vavu ya butterfly ndi yofanana ndi gawo la payipi kuti lipangitse valavu, ** kuyika mbale ya valve, imagwiritsidwa ntchito kuwongolera chowongolera wamba. Oyenera PA KUPANDA KWA PANSI, KUPIRITSIDWA KWAPAKATI KAPENA, ZOSOWAWA, KWAMBIRI STATIC PRESSURE, KUYAMBIRA KWAMBIRI, koma kupanikizika kosiyana kumakhala kochepa. Kukula kwake kwakung'ono, kulemera kwake, kuwala kwa 4 ~ 10 kuposa mtundu womwewo wa valavu yozungulira yozungulira, caliber ndi mtengo wake ndi wochepa, makamaka woyenera pazochitika zazikulu, ndipo kukula kwake kwa valavu yolamulira, ndizomwe zimapangidwira. Nthawi zambiri, pamene DN> 300mm, kawirikawiri anamaliza ndi gulugufe valavu.