Gabatarwa zuwa Bellow Seed valves

Bellow(s) Hatimin (ed) Valves

Yabo a wurare daban-daban a cikin bututun da aka samo a cikin tsire-tsire masu guba yana haifar da hayaki. Ana iya gano duk irin waɗannan wuraren zubar da ruwa ta amfani da hanyoyi da kayan aiki daban-daban kuma ya kamata injiniyan shuka ya lura da su. M yayyo maki sun hada da flanged gasket gidajen abinci da Valve / famfo gland shiryar, da dai sauransu. A yau da sinadaran aiwatar da masana'antu ne gearing kanta zuwa ga aminci fasaha ga mafi aminci muhalli kariya da shi ya zama kowane tsari injiniya alhakin tsara shuke-shuke da iyaka lalacewa ga muhalli ta hanyar. hana zubar da duk wani sinadari mai guba.

Yabo daga glandar Valve ko akwatiyawanci abin damuwa ne ga injiniyan kulawa ko shuka. Wannan yabo yana nufin:
a) Asarar abu b) Gurbacewar yanayi c) Haɗari ga ma'aikatan shuka.

Alal misali, ɗauki yanayin ɗigon tururi ta hanyar ƙwayar Valve. A 150 PSI, izinin kawai 0.001 ″ ta gland shine zai haifar da zubewa a cikin adadin 25 lb/h. Wannan yayi daidai da asarar dala 1.2 a cikin sa'o'i takwas, ko dalar Amurka 1,100 a kowace shekara. Hakazalika, ƙaramin digon diamita na 0.4 mm a kowace daƙiƙa yana haifar da asarar kusan lita 200 a kowace shekara na mai ko kaushi mai tsada. Ana iya rage wannan ɗigo da yawa ta amfani da Valve hatimin bellow. Wannan labarin yanzu zai yi la'akari da ginawa da aiki na hatimin bellow.

Bellow gini

Harsashin bellow yana welded zuwa duka Valve Bonnet da kuma tushen Valve. Harsashin bellow yana da ɗimbin juzu'i kuma waɗannan rikice-rikice suna zama masu matsawa ko faɗaɗa dangane da motsin tushe na Valve. (A kimiyyance maganan bellow yana matsawa lokacin da Valve ke cikin buɗaɗɗen matsayi kuma yana faɗaɗa lokacin da Valve ke cikin yanayin rufe). Yana da mahimmanci don shigar da jikin Valve daidai. Za a iya rufe belin zuwa Valves ta hanyoyi daban-daban guda biyu. Da fari dai, za a iya waldar belin zuwa tushen Valve a sama da kuma jikin Valve a kasa. A wannan yanayin ruwan tsari yana ƙunshe a cikin bellow ko kuma a hanya ta biyu ana walda bellow zuwa tushen Valve a ƙasa da jiki a saman. A wannan yanayin ruwan tsari yana ƙunshe a cikin yanki na annular tsakanin Valve Bonnet da bellow (daga waje).

Ƙaƙwalwar ƙaƙƙarfan abu ne mai mahimmanci kuma yana samar da zuciyar madaidaicin Valves. Don guje wa duk wani karkatar da belin Valve dole ne ya kasance yana da tushe mai motsi na layi kawai. Ana iya samun wannan ta amfani da abin da ake kira sleeve-nut a sashin Yoke na Valve Bonnet. An sa ƙafar ƙafar hannu akan goro-hannu wanda ke canza jujjuyawar motsin ƙafar hannu cikin motsin layi a cikin tushen Valve.

Bellow iri

Akwai manyan nau'ikan bellow guda biyu: Ƙarfafa Bellow da welded Bellow. Ana yin ƙwanƙwasa nau'in nau'in ɓangarorin ne daga mirgina takarda mai lebur (babban bangon bango) a cikin bututu wanda aka yi masa walda. Wannan bututu daga baya an yi ta da injina ko kuma ta hanyar hydrostatically zuwa cikin ɓangarorin da ke da madaukai masu zagaye da sarari. Nau'in nau'in leaf ɗin da aka yi masa walda ana yin shi ta hanyar waldawa kamar faranti na ƙarfe na bakin ciki tare a ciki da waje na wankin - kamar faranti. Ƙwaƙwalwar leaf ɗin welded tana da ƙarin ninkuwa kowane tsayin raka'a idan aka kwatanta da ƙirƙira bellows. Don haka, don tsayin bugun jini iri ɗaya, jabun ƙwanƙwasa sun fi tsayi biyu zuwa uku fiye da takwarorinsu na welded ganye.

An ba da rahoton cewa, ƙirƙira ƙirƙira ta injina tana kasawa a wuraren bazuwar, yayin da ganyen welded yakan gaza a kusa da walda. Don tabbatar da cikakken shigar bangon bellow da walƙiya na ƙarshe yana da kyau a ƙirƙira ta amfani da waldawar micro plasma.

Tsarin Bellow

An fi son ƙirar ƙwanƙwasa da yawa don sarrafa magudanar ruwa mai ƙarfi (gaba ɗaya plies biyu ko uku na bangon ƙarfe). Ƙaƙwalwar ƙwanƙwasa guda biyu na iya ƙara ƙimar matsin lamba da 80% zuwa 100% idan aka kwatanta da katako guda ɗaya na kauri ɗaya. A madadin haka, idan aka yi amfani da ƙanƙara guda ɗaya na kauri daidai da ma'aunin matsi na ƙwanƙwasa ƙwanƙwasa biyu, tsayin bugun bugun jini ya ragu. Don haka, ƙirar ƙwanƙwasa da yawa tana ba da fa'ida ta musamman akan ƙwanƙwasa guda ɗaya. A bayyane yake cewa ƙwanƙwasa yana ƙarƙashin gajiyar ƙarfe kuma wannan gajiya na iya haifar da gazawar walda. Rayuwar gajiyar da ke cikin ƙasa tana shafar kayan gini, fasahar ƙirƙira, tsayin bugun jini da mitar bugun jini, ban da ma'auni na yau da kullun kamar zazzabi na ruwa da matsa lamba.

Kayan Bellow

Shahararren bakin karfe na bellow shine AISI 316Ti wanda ke dauke da Titanium don jure yanayin zafi. A madadin, Inconel 600 ko Inconel 625 suna inganta ƙarfin gajiya da juriya na lalata idan aka kwatanta da bakin karfe. Hakazalika, Hastalloy C-276 yana ba da juriya mai girma da ƙarfin gajiya fiye da Inconel 625. Za'a iya inganta juriya ga gajiya ta hanyar amfani da tsarin ƙwanƙwasa mai yawa da kuma rage tsawon bugun jini; wannan na iya ƙara yawan rayuwar sabis ɗin bellow.

Zaɓuɓɓukan Valve

Mafi yawan nau'ikan Valve da aka fi dacewa da su tare da hatimin bellow sune ƙirar ƙofa da ƙirar duniya (duba Hoto 1) .Waɗannan sun dace sosai don amfani da bellow saboda ginin ciki da motsi na axial na tushen Valve.
Dangane da bayanan da ake samu, da alama Valves ɗin hatimin hatimin na yanzu yana da girma daga 3 mm NB zuwa 650 mm NB. Ana samun ƙimar matsin lamba daga ANSI 150# zuwa 2500#. Zaɓuɓɓukan kayan abu don Valves sun haɗa da ƙarfe na carbon, bakin karfe da sauran gami.

Aikace-aikace

Kafofin watsa labarai na Canja wurin zafi: Ana yawan amfani da mai mai zafi a masana'antu kamar su fibers na roba / POY (Yarin da aka Gabatar da Partially Oriented). Duk da haka, a koyaushe ana samun haɗarin gobara saboda zubar da mai mai zafi a kan sinadarai masu ƙonewa sosai. Anan, bawul ɗin hatimin hatimi na iya dakatar da zubewar.

Vacuum / ultra high vacuum: wasu aikace-aikace na buƙatar famfo don ci gaba da fitar da iska daga bututun mai. Duk wani bawul na al'ada da aka sanya akan bututun na iya ba da damar iska ta waje ta shiga cikin bututun ta cikin akwatin sharar Valve. Don haka hatimin bellow shine kawai mafita don hana iska wucewa ta cikin akwati.
Ruwa masu haɗari sosai: don kafofin watsa labaru irin su chlorine (duba Hoto 2), hydrogen, ammonia da phosgene, hatimin bellow shine kyakkyawan tsari yayin da aka kawar da zubewar gland gaba ɗaya.
Makamin nukiliya, shukar ruwa mai nauyi: a cikin lokutan da za a hana zubar da jini a kowane lokaci, hatimin bellow shine zaɓi na ƙarshe.
Ruwa masu tsada: a wasu aikace-aikace ana buƙatar guje wa ɗigon ruwa kawai saboda tsadar ruwan. Anan, ƙima na tattalin arziki sau da yawa yana fifita amfani da bellow seal Valves.
Matsayin muhalli: a duk faɗin duniya, ƙa'idodi game da hayaki da muhalli suna samun ƙarfi kowace rana. Don haka yana iya zama da wahala ga kamfanoni su faɗaɗa cikin wuraren da ake da su. Tare da amfani da bellow hatimi Valves, fadada ba tare da ƙarin muhalli ba
lalacewa yana yiwuwa.