Kuya kwenzeka ntoni kwiivalvu zebhola kumaqondo obushushu aphantsi?

Kwiindawo eziphantsi kobushushu, ukusebenza kweiivalve zebholaiya kuchaphazeleka kakhulu, njengoko kubonisiwe ngezantsi:

Utshintsho kwiipropati eziphathekayo kubangela ubunzima bokusebenza okanye umonakalo

Ubushushu obuphantsi bunokwenza izinto eziphathekayoiivalve zebholai-brittle, ngokukodwa izinto zokutywinwa ezingezizo ezentsimbi, i-coefficient yayo yokwandisa inkulu kakhulu kuneyezinto zetsimbi. Ngexesha lokunciphisa iqondo lobushushu eliphantsi, umahluko phakathi kokucutheka phakathi kwezitywina ezingezizo ezentsimbi kunye nemizimba yevalve yentsimbi kunye nezitywina zibalulekile, okukhokelela ekunciphiseni okukhulu koxinzelelo lokutywinwa kunye nokungakwazi ukutywina. Ngokomzekelo, i-rubber iya kulahlekelwa ngokupheleleyo i-elasticity kwaye ibe yiglasi, ilahlekelwe iimpawu zayo zokutywinwa xa iqondo lokushisa lingaphantsi kweqondo lokushisa lokutshintsha kweglasi; Kwisiphakathi se-LNG, irabha iseneempawu zogwebu kwaye ayinakusetyenziselwa iivalvu ze-LNG. Ukongeza, amaqondo obushushu aphantsi anokubangela uxinzelelo oluphantsi ukuphuka kwemathiriyeli. Ngokomzekelo, i-austenitic stainless steel, eyayisekuqaleni kwi-metastable state kumaqondo aphantsi, iguqula ibe yi-martensite xa iqondo lokushisa lihla ngaphantsi kwendawo yokuguquka kwesigaba. Ukutshintsha komthamo kubangela ukwanda koxinzelelo lwangaphakathi, okubangela ukuba indawo yokutywina iguqe kwaye iguqulwe, okukhokelela ekungaphumeleli kokutywinwa.

Ukusebenza okucuthiweyo kokutywinwa kukhokelela ekuvuzeni okuphakathi

Ukuba ubushushu obuphantsiivalve yebholaisebenzisa isinyithi kwizinto ezingezizo intsimbi yokutywina iperi, izinto ezingezizo ezentsimbi ziya kuba lukhuni kwaye zibe brittle kumaqondo obushushu aphantsi, ziphulukane nokuqina, okukhokelela ekuhambeni okubandayo kunye nokuphumla koxinzelelo, kunye nokuncipha kokutywinwa kokusebenza. Nangona kunjalo, okwangoku xa kuyilwa iivalvu zobushushu obuphantsi, imathiriyeli yokutywina engeyiyo eyentsimbi ayisasetyenziswa xa iqondo lobushushu lingaphantsi kwe -70 ℃, okanye zicutshungulwa zibe yintsimbi kunye nezakhiwo ezidityanisiweyo ezingezizo ezentsimbi. Kwangaxeshanye, ukushwabana okungalinganiyo okubangelwa kukwahluka kwamaqondo obushushu kwiindawo ezahlukeneyo zamalungu okanye umahluko kwiipropathi ezibonakalayo phakathi kwezixhobo ezahlukeneyo nako kunokuvelisa uxinzelelo olwenziwa yiqondo lobushushu, kubangele ukugqwetheka okulastiki okanye ukugqwetheka okungenakujikwa komgangatho wokutywina, okuchaphazela isiphumo sokutywinwa.

Ivalve yebhola eyenzelwe ngokukodwa ubushushu obuphantsi buyakwazi ukuziqhelanisa nemekobume yobushushu obuphantsi

Ukujamelana nomngeni weqondo lokushisa eliphantsi, i-valve yebhola yebhola ephantsi ithatha idizayini ekhethekileyo. Ukuba i-valve ye-valve yentamo ende isetyenziselwa ukukhusela ibhokisi yokupakisha kwaye uyigcine kude namaqondo okushisa aphantsi ukuze kuqinisekiswe umphumo wokutywinwa kokupakisha, izinto ezibandayo zokugquma nazo zingagqunywa ukukhusela ukulahleka kwamandla abandayo; Xa ubushushu bokusebenza bungaphantsi kwe-100 ℃, i-valve stem material iphathwa nge-chrome plating okanye i-nitriding ukuphucula ukuqina komphezulu kunye nokuphucula ukuthembeka kwetywina lokupakisha; Ukuxhotyiswa ngesakhiwo sokuthintela ukunyuka koxinzelelo olungaqhelekanga, xa uxinzelelo lwenyuka kwigumbi le-valve, igumbi kunye ne-inlet ixhunyiwe okanye i-valve yokunciphisa uxinzelelo ifakwe kwi-inlet ekupheleni ukuqinisekisa ukusetyenziswa okukhuselekileyo; Igasket esetyenzisiweyo inokutywinwa ngokuthembekileyo kwaye yomelele kwiqondo lobushushu begumbi, ubushushu obuphantsi, kunye notshintsho lobushushu.