Iimpawu zokuhamba kwevalvu yokulawula ziquka ikakhulu iimpawu ezine zokuhamba: umgca othe tye, ipesenti elinganayo, ukuvulwa ngokukhawuleza kunye neparabola.
Xa ifakelwe kwinkqubo yokulawula yokwenyani, uxinzelelo lomahluko lwevalvu luya kutshintsha ngokutshintsha kwesantya sokuhamba. Oko kukuthi, xa isantya sokuhamba sincinci, ukulahleka koxinzelelo lwenxalenye yepayipi kuncinci, kwaye uxinzelelo lomahluko lwevalvu luya kwanda, kwaye uxinzelelo lomahluko lwevalvu luya kuncipha xa isantya sokuhamba sisikhulu. Olu phawu lwevalvu, olwahlukileyo kwimpawu yendalo, lubizwa ngokuba luphawu lokuhamba olusebenzayo.
Ivalvu yangaphakathi yesici sokuqalisa ngokukhawuleza inesimo sediski kwaye isetyenziselwa ikakhulu isenzo sokuvula/sokuvala.
Iimpawu zokulawula ukuhamba kwevalvu yokulawula i-spool surface shape valve zimiselwa ziimpawu zokuhamba kwevalvu kunye nokudibana kwemibhobho yenkqubo, iimpompo, njl.njl., kwaye zikhethwa kwitheyibhile engezantsi ngokwesilinganiso sokulahleka koxinzelelo lwevalvu kwinto nganye yokulawula kunye nenkqubo.
Into yokulawula Ubungakanani bokulahleka koxinzelelo lwevalvu kwinkqubo Iimpawu zokuhamba kwevalvu
Ulawulo lokuhamba kwamanzi okanye ulawulo lwenqanaba lolwelo Ngaphantsi kwama-40% Ipesenti elinganayo
ulawulo lokuhamba okanye ulawulo lwenqanaba lolwelo Ngaphezulu kwama-40% Umgca othe tyaba
ulawulo loxinzelelo okanye ubushushu obuphantsi kwe-50% Ipesenti elinganayo
ulawulo loxinzelelo okanye ulawulo lobushushu Ngaphezulu kwe-50% Linear
Ekubeni ukulahleka koxinzelelo lwepayipi kuyanda ngokulingana nesikwere sesantya sokuhamba, ukuba iimpawu zomzimba wevalvu zibonisa utshintsho olulula oluthe ngqo, uxinzelelo lomahluko lwevalvu luyanda xa isantya sokuhamba sincinci, kwaye isantya sokuhamba siba sikhulu xa ivalvu ivulwa kancinci. Xa isantya sokuhamba sikhulu, uxinzelelo lomahluko lwevalvu luyancipha. Isantya sokuhamba asinakulingana ngokuthe ngqo nokuvulwa kwevalvu. Ngenxa yesi sizathu, injongo yokuyila uphawu olulinganayo lwepesenti kukongeza iimpawu zepayipi kunye nepompo ukuze kufezekiswe ulawulo lokuhamba oluzimeleyo kwisantya sokuhamba kwaye lutshintsha kuphela ngokulingana nokuvulwa kwevalvu.
Ukusebenza kwe
inkqubo yemibhobho kunye nevalvu yokulawula ukulahleka koxinzelelo
inokukhethwa ngokuhambelana nomxube weyunithi yokuqhuba kunye nomzimba wevalvu.
Umxube weyunithi yokuqhuba kunye nomzimba wevalvu kunye nentshukumo yevalvu (umzekelo wevalvu yesihlalo esinye)
Isenzo sevalvu siquka iintlobo ezintathu: isenzo esithe ngqo, isenzo esibuyela umva, kunye nesenzo sohlobo lokubamba. Indlela yesenzo esithe ngqo ye-pneumatic drive efana nohlobo lwe-diaphragm kunye nohlobo lwesilinda yindlela yokuvala ivalvu ngokwandisa isignali yoxinzelelo lomoya, eyaziwa ngokuba yi-"AIR TO CLOSE". Indlela yesenzo esibuyela umva kukuvula ivalvu ngokwandisa isignali yoxinzelelo lomoya, eyaziwa ngokuba yi-"AIR TO OPEN" okanye "AIR ONLY TO CLOSE". Izibonakaliso ezisebenza ngombane zinokuguqulwa zibe ziisignali zomoya yi-positioner. Xa isignali yokusebenza iphazamisekile okanye umthombo womoya uphazamisekile okanye umbane ucinyiwe, nceda uqwalasele ukhuseleko kunye nengqiqo yenkqubo kwaye ukhethe ukuyivala okanye ukuyivula ivalvu.
Umzekelo, xa ulawula ubungakanani be-asidi ngevalvu kwinkqubo yokuxuba amanzi kunye ne-asidi, kukhuselekile kwaye kufanelekile ukuvala ivalvu yokulawula i-asidi xa umgca wesignali yombane uqhawukile okanye imibhobho yesignali yomoya ivuza, umthombo womoya uphazamisekile, okanye umbane unqunyulwe. Ivalvu yesenzo esibuyela umva.
Ixesha lokuthumela: Agasti-31-2023