Kugawa ndi kugwiritsa ntchito ma valve owunikira
Valavu yowunikira imatanthauza magawo otsegulira ndi otsekera a valavu yozungulira ndipo imadalira kulemera kwawo ndi mphamvu ya media kuti ipange kanthu kuti ilepheretse kuyenda kwapakati kwa valavu. Valavu yowunikira ndi valavu yodziyimira yokha, yomwe imadziwikanso kuti valavu yowunikira, valavu yolowera mbali imodzi, valavu yosabwerera kapena valavu yodzipatula.
Kusuntha kwa flap kumagawidwa m'magulu awiri:valavu yoyezera kukwezandivalavu yoyezera swing. Valavu yoyezera chivundikiro ndi kapangidwe ka vavu yozungulira ndi zofanana, kungoti palibe tsinde la vavu loyendetsa chivundikiro cha vavu. Cholumikizira kuchokera kumbali yolowera (mbali yapansi) kulowa, kuchokera kumbali yotulukira (mbali yakumwamba) kutuluka. Pamene kuthamanga kwa cholowera kuli kwakukulu kuposa kulemera kwa chivundikiro cha vavu ndi kukana kwake kuyenda komanso pamene vavu yatsegulidwa. Mosiyana ndi zimenezi, vavu imatsekedwa pamene cholumikiziracho chikuyenda chammbuyo. Vavu yoyezera chivundikiro imakhala ndi slant ndipo imatha kuzungulira mozungulira mzere wa chivundikiro cha vavu, mfundo yogwirira ntchito ndi yofanana ndi vavu yoyezera chivundikiro. Mavavu oyezera nthawi zambiri amagwiritsidwa ntchito ngati valavu yapansi ya chipangizo chopopera, chomwe chingalepheretse kuyenda kwa madzi kumbuyo. Mavavu oyezera ndi mavavu ozungulira omwe amagwiritsidwa ntchito pamodzi, amatha kukhala ndi gawo lotetezeka lodzipatula. Zoyipa zake ndi kukana kwakukulu komanso kutseka kosayenera akatsekedwa.
Choyamba, valavu yoyezera kukweza ili ndi mitundu iwiri yoyimirira ndi yopingasa.
Mawonekedwe a thupi la valavu ya valavu yoyezera kukweza ndi ofanana ndi a valavu yozungulira, kotero imakhala ndi kukana kwakukulu kwa madzi. Chophimba cha valavu chimatsetsereka pamzere woyima pakati pa thupi la valavu. Pamene chophimbacho chikuyenderera, chophimbacho chimatsegulidwa ndi kupondereza kwapakati, ndipo pamene chophimbacho chikusiya kuyenda, chophimbacho chimagwera pa mpando wa valavu mwa kudzipachika chokha.
Valavu yoyezera kukweza yoyimirira. Njira yolowera ndi yotulutsira njira yolowera ndi njira yotulutsira njira ndi njira yolowera pa mpando wa valavu ndi yofanana, kukana kwa kayendedwe ka madzi ndi kochepa kuposa mtundu wowongoka. Valavu yoyezera kukweza yoyimirira imayikidwa mu mapaipi oyimirira.Kudzera mu valavu yoyezera kukweza, ikhoza kuyikidwa mu payipi yopingasa yokha. Yoletsedwa ndi zofunikira pakuyika, yomwe imagwiritsidwa ntchito nthawi zambiri m'mimba mwake yaying'ono DN <50.
Chachiwiri, diski ya valavu yowunikira swing ili yozungulira ndipo imazungulira mozungulira mzere wa khwalala la mpando wa valavu.
Chifukwa cha njira yolumikizirana mkati mwa valavu, kukana kwa kayendedwe ka madzi kumakhala kochepa kuposa kwa valavu yoyezera kukweza. Ndi yoyenera mapaipi ang'onoang'ono ndi apakatikati, otsika mphamvu, komanso akuluakulu (kuthamanga kochepa komanso mainchesi akuluakulu komwe kuyenda sikumasintha pafupipafupi). Kutseka sikwabwino ngati mtundu wokweza.
Ma valve oyesera ma swing amagawidwa m'mitundu itatu: single disc, double disc, ndi multi disc. Mitundu itatuyi imagawidwa makamaka malinga ndi kukula kwa valve, kuti apewe kugwedezeka kwa hydraulic pamene medium imasiya kuyenda kapena kuyenda mmbuyo. Ma valve oyesera ma swing a single disc nthawi zambiri amakhala oyenera kugwiritsidwa ntchito pa caliber yapakati. Mukamagwiritsa ntchito single disc swing check valve pamapaipi akuluakulu, ndibwino kugwiritsa ntchito valavu yotseka pang'onopang'ono yomwe ingachepetse kuthamanga kwa nyundo yamadzi kuti muchepetse kuthamanga kwa nyundo yamadzi. Ma valve oyesera ma swing a double disc ndi oyenera mapaipi akuluakulu ndi apakati. Valavu yoyesera ma disc awiri yokhala ndi kapangidwe kakang'ono komanso kulemera kopepuka ndi valavu yoyesera yomwe ikukula mwachangu; Ma valve oyesera ma disc ambiri ndi oyenera mapaipi akuluakulu.Malo oyika valavu yoyezera swing si ochepa, ndipo ikhoza kuyikidwa pa mapaipi opingasa, oimirira, kapena opendekera.
Chachitatu, valavu yowunikira gulugufe: mtundu wowongoka.
Kapangidwe ka valavu yoyezera gulugufe ndi kofanana ndi valavu yoyezera gulugufe. Kapangidwe kake ndi kosavuta, kukana kuyenda kwa madzi pang'ono, kuthamanga kwa nyundo ya madzi nakonso ndi kochepa. Chophimba cha valavu chimazungulira pini yomwe ili pampando wa valavu yoyezera. Vavu yoyezera mtundu wa disc ili ndi kapangidwe kosavuta, imatha kuyikidwa paipi yopingasa yokha, kutseka kwake ndi kofooka.
Chachinayi, valavu yowunikira diaphragm: pali mitundu yosiyanasiyana ya kapangidwe kake, yonse imagwiritsa ntchito diaphragm ngati gawo lotsegulira ndi kutseka.
Chifukwa cha ntchito yake ya nyundo yamadzi, kapangidwe kake kosavuta, mtengo wotsika, valavu yowunikira ya diaphragm yakhala ikugwiritsidwa ntchito kwambiri m'zaka zaposachedwa. Koma kugwiritsa ntchito kutentha ndi kuthamanga kwa valavu yowunikira ya diaphragm kumachepetsa kugwiritsa ntchito zida za diaphragm.Valavu yowunikira ya diaphragm ndi yoyenera kuti madzi asawonongeke mosavuta pa payipi, diaphragm ikhoza kukhala yabwino kwambiri kuchotsa sing'anga motsutsana ndi kuyenda kwa madzi komwe kumapangidwa ndi kugwedezeka, nthawi zambiri imagwiritsidwa ntchito mu payipi yotenthetsera yotsika, makamaka yoyenera mapaipi amadzi, kutentha kwa sing'anga komwe kuli pakati pa -12 - 120 ℃ pakati pa kuthamanga kwa ntchito kwa <1.6MPa, koma valavu yowunikira ya diaphragm ikhoza kuchitidwa kuti ikwaniritse calibre yayikulu, kuchuluka kwake kumatha kufikika mu DN 2000mm kapena kuposerapo! Komabe, valavu yowunikira ya diaphragm ikhoza kukhala yayikulu, DN imatha kufika 2000mm kapena kuposerapo.
