Cheki vharuvhu (Check valve) zvinoreva vharafu rinovhurika nekuvhara dhisiki revharuvhu zvichienderana nekuyerera kwepakati pachayo kudzivirira kuyerera kwepakati.Iyo inozivikanwawo secheki vharafu, imwe-nzira vharafu, reverse kuyerera vharafu uye kumashure kumanikidza vharafu.Cheki vharuvhu ndeye otomatiki valve.Basa rayo guru nderekudzivirira kuyerera kwepakati, kutenderera kutenderedza kwepombi uye kutyaira mota, uye kuburitswa kwemudziyo wepakati.
Kushanda nheyo yevhavhavhavha
1. Kuti udzivirire reverse kuyerera kwepakati, cheki mavharuvhu achaiswa pamidziyo, zvishandiso uye mapaipi;
2. Cheki mavharuvhu kazhinji akakodzera midhiya yakachena, kwete midhiya ine zvimedu zvakasimba uye yakakwirira viscosity;
3. Kazhinji, horizontal lifting check valve ichasarudzwa pahorizontal pipeline ine dhayamita ye50mm;
4. Yakarurama kuburikidza nekusimudza cheki valve inogona kuiswa chete muhorizontal pipeline;
5. Kune pombi inopinza yepombi, valve yepasi inofanira kusarudzwa.Kazhinji, vharuvhu yepasi inongoiswa papombi yakatwasuka papombi inopinza, uye yepakati inoyerera kubva pasi ichienda kumusoro;
6. Rudzi rwekusimudza rune zviri nani kuvhara kushanda uye kupikisa kukuru kwemvura kupfuura rudzi rwekuzunungusa.Rudzi rwakachinjika runofanira kuiswa papombi yakachinjika uye rudzi rwakamira papombi yakatwasuka;
7. Nzvimbo yekuisa ye swing check valve haina kukwana.Inogona kuiswa pahorizontal, vertical kana inclined mapaipi.Kana yakaiswa pamapaipi akatwasuka, iyo yepakati inoyerera nzira inofanirwa kubva pasi kuenda kumusoro;
8. Iyo swing check valve haifaniri kuitwa kuva duku-diameter valve, asi inogona kuitwa mukushanda kwakanyanya kwekushanda.Iyo yekumanikidza yezita inogona kusvika 42MPa, uye iyo yezita dhayamita inogona zvakare kuve yakakura kwazvo, inogona kusvika kupfuura 2000mm.Zvinoenderana neakasiyana zvinhu zvegoko uye chisimbiso, inogona kushanda kune chero inoshanda svikiro uye chero yekushanda tembiricha renji.Iyo yepakati imvura, chiutsi, gasi, corrosive medium, mafuta, mushonga, etc. Kushanda tembiricha yepakati ndeye - 196-800 ℃;
9. Swing check valve inokodzera kudzvinyirira kwakadzika uye dhayamita yakakura, uye chiitiko chekuisa chishoma;
10. Nzvimbo yekuisa butterfly check valve haina kukwana.Inogona kuiswa pahorizontal pipeline kana vertical or inclined pipeline;
Structural principle of check valve
Kana iyo swing cheki valve yakavhurwa zvizere, iyo fluid pressure inenge isina kuvharidzirwa, saka kudonha kwemhepo kuburikidza nevhavha kunenge kudiki.Chigaro chekusimudza cheki chevhavha chiri panzvimbo yekuisa chisimbiso chemuviri wevhavha.Kunze kwekuti dhisiki yevhavha inogona kusimuka uye ichidonha zvakasununguka, iyo yakasara yevhavha yakafanana nevhavha yekumira.Iyo mvura inodzvinyirira inosimudza dhisiki yevhavha kubva pachisimbiso chechigaro chevhavha, uye yepakati backflow inoita kuti dhisiki yevhavha idonhe ichidzokera kuchigaro chevhavha uye ichigura kuyerera.Zvinoenderana nemamiriro ebasa, dhisiki yevharuvhu inogona kuve yeese simbi dhizaini kana yakashongedzwa nerabha pad kana rubber ring pane valve disc frame.Kufanana nevhavha yekumisa, kubuda kwemvura kuburikidza nevhavha yekusimudzira yekuongorora zvakare yakamanikana, saka kudonha kudonha kuburikidza nevhavha yekutarisa yekusimudzira yakakura kudarika iyo yevhavha yekuongorora ye swing, uye kuyerera kwevhavha yekuongorora ye swing hakuwanzo kuderedzwa.
1, Swing cheki vharafu: dhisiki yevhavha yekutarisa iri muchimiro chedhisiki uye inotenderera ichitenderedza shaft yechigaro chevharuvhu.Nemhaka yokuti chiteshi chiri muvharuvhu chakagadziridzwa uye kuramba kuyerera kudiki pane yevhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavha yekusimudza, inokodzera zviitiko zvakakura-dhayamita ine yakaderera kuyerera kweyero uye isingawanzo kuyerera kuyerera, asi haina kukodzera pulsating kuyerera, uye yayo. kuita chisimbiso hakuna kunaka seyekusimudza cheki vharafu.Swing cheki vharafu yakakamurwa kuita imwechete disc mhando, kaviri dhisiki mhando uye akawanda hafu mhando.Aya mafomu matatu anonyanya kukamurwa zvichienderana nedhayamita yevharuvhu, kuitira kudzivirira iyo hydraulic kukanganisa kubva pakushaikwa kana yepakati inomira kuyerera kana kuyerera ichidzoka.
2, Simudza cheki vharafu: cheki vharafu ine vharuvhu disc inotsvedza padivi pepakati pepakati pemuviri wevharuvhu.Iyo yekusimudza cheki valve inogona kuiswa chete pahorizontal pombi.Pa-high-pressure diki-diameter check valve, valve disc inogona kutora bhora.Chimiro chemuviri wekusimudza cheki chevhavha yakangofanana neyevhavha yekumisa (iyo inogona kushandiswa nevhavha yekumira), saka iyo inodzivirira mvura inokwana coefficient yakakura.Chimiro chayo chakafanana nevhavha yekumira, uye muviri wevhavha uye disc zvakafanana nevhavha yekumira.Chikamu chepamusoro chevhavha disc uye chikamu chezasi chechivharo chevhavha chinogadziriswa negwara rinotungamira.Iyo valve disc inotungamira sleeve inogona kusimuka nekudonha zvakasununguka muvharuvha cap inotungamira sleeve.Kana iyo yepakati ichiyerera ichidzika pasi, dhisiki yevharuvhu inovhura nekukanda kwepakati.Kana iyo yepakati ikamira kuyerera, dhisiki yevharuvhu inowira pachigaro chevharuvhu chakatwasuka kudzivirira kuyerera kwepakati.Mafambiro epakati pekupinda nekubuda mugero akananga kuburikidza nekusimudza cheki vharafu ari perpendicular kugwara rechigaro chevharuvhu chiteshi;Iyo nzira yepakati inopinza uye yekubuda mugero ye vertical lifting check valve yakangofanana neiyo yevharuvhu chigaro chiteshi, uye kuyerera kwayo kuramba idiki pane iyo yakatwasuka kuburikidza nevhavhavhavha.
3, Butterfly cheki vharuvhu: cheki vharuvhu ine dhisiki inotenderera ichitenderedza pini shaft pachigaro chevharuvhu.Disc cheki vharafu ine chimiro chakareruka uye inogona chete kuisirwa pahorizontal pombi ine isina kunaka yekuisa chisimbiso.
4, Pipeline cheki vharafu: vharafu ine dhisiki inotsvedza nepakati pemutsara wemuviri wevharuvhu.Pipeline cheki vharuvhu ivharuvhu itsva.Iine vhoriyamu diki, uremu huremu uye yakanaka yekugadzirisa tekinoroji.Ndiyo imwe yenzira dzekusimudzira cheki valve.Nekudaro, iyo fluid resistance coefficient yakakura zvishoma pane iya ye swing check valve.
5, Kudzvanya cheki vharafu: Iri vharafu rinoshandiswa sevhavha yekudyisa mvura uye vharafu yekuvhara-vhavha.Iyo ine yakazara basa rekusimudza cheki vharafu, yekumisa vharafu kana angle valve.
Mukuwedzera, kune mamwe mavharuvhu ekutarisa asingakodzere kuiswa kwepombi yekubuda, yakadai sevharuvhu yepasi, mhando yechitubu, Y mhando, nezvimwe.
Nguva yekutumira: Chivabvu-09-2022