Kuwonjezeka kwa chidziwitso I

Valavu yowongolera ma diaphragm ya pneumatic m'chithunzichi ndi ya mtundu wa mpweya wotuluka. Anthu ena anafunsa kuti, chifukwa chiyani? Choyamba, yang'anani njira yolowera mpweya ya filimu ya pneumatic, yomwe ili ndi zotsatira zabwino. Chachiwiri, yang'anani njira yoyika spool, zotsatira zabwino. Chipinda cha mpweya wa diaphragm chimalumikizidwa ndi gwero la mpweya, ndipo diaphragm imakankhira pansi pa kasupe sikisi wotsekedwa ndi diaphragm, kotero kuti kukankhira ndodo ya valve kusunthira pansi. Ndodo ya valve imagwirizanitsidwa ndi chigawo cha valve, ndipo chigawo cha valve chimayikidwa kumbali yabwino, kotero kuti mpweya umakhala ndi valve kuti upite kumalo otsekedwa. Chifukwa chake, amatchedwa valavu yotseka gasi. Pamene mpweya umasokonekera chifukwa cha zomangamanga kapena dzimbiri la chitoliro cha gasi, valavu idzayambiranso pansi pa mphamvu ya masika, ndipo valavu idzakhala yotseguka. Momwe mungagwiritsire ntchito valve yotseka gasi? Momwe mungagwiritsire ntchito zimaganiziridwa kuchokera kumalo otetezera, zomwe ndizofunikira kusankha gasi kapena kutseka. Mwachitsanzo: chimodzi mwazinthu zazikulu za boiler ndi ng'oma ya nthunzi. Valavu yoyang'anira yomwe imagwiritsidwa ntchito m'magawo operekera madzi iyenera kukhala yotsekedwa ndi mpweya. Chifukwa chiyani? Mwachitsanzo, ngati gwero la gasi kapena magetsi akusokonezedwa mwadzidzidzi, ng'anjoyo ikuyakabe mwamphamvu, ikuwotcha madzi mosalekeza mu ng'oma ya nthunzi. Ngati mpweya umagwiritsidwa ntchito potsegula valavu yolamulira ndipo mphamvu imasokonezedwa, valavu idzatsekedwa ndipo ng'oma ya nthunzi idzakhala youma (kuwotcha kouma) mphindi iliyonse popanda kulowa kwa madzi. Izi ndi zoopsa kwambiri. Sizingatheke kuthana ndi vuto la valavu yowongolera mu nthawi yochepa, zomwe zingayambitse ngozi yotseka boiler. Chifukwa chake, kuti mupewe kuyaka kowuma kapena ngozi yotseka, valavu iyenera kutsekedwa ndi gasi. Ngakhale mphamvu imadulidwa ndipo valavu yolamulira ili pamalo otseguka, madzi amadyetsedwa mosalekeza mu ng'oma, koma sichidzachititsa kuti ng'oma iume. Pali nthawi yolimbana ndi kulephera kwa valve yolamulira, kotero sikoyenera kutseka chowotchera mwachindunji. Kupyolera mu zitsanzo zomwe zili pamwambazi, ndi nthawi yoti mukhale ndi chidziwitso choyambirira cha momwe mungasankhire mpweya pa valve yolamulira ndi mpweya wotuluka!