Yuav ua li cas rau pob li qub ntawm qhov kub thiab txias?

Nyob rau hauv qis-kub ib puag ncig, kev ua tau zoo ntawmpob li qubyuav raug cuam tshuam loj heev, raws li qhia hauv qab no:

Kev hloov pauv ntawm cov khoom siv ua rau muaj teeb meem kev ua haujlwm lossis kev puas tsuaj

Tsawg kub tuaj yeem ua cov khoom ntawmpob li qubbrittle, tshwj xeeb tshaj yog cov ntaub ntawv uas tsis yog xim hlau, uas nws expansion coefficient yog ntau dua li cov ntaub ntawv hlau. Thaum lub sij hawm qis qis, qhov sib txawv ntawm qhov shrinkage ntawm cov hlau tsis yog hlau thiab cov hlau valve lub cev thiab cov ntsaws ruaj ruaj yog qhov tseem ceeb, uas ua rau muaj qhov txo qis hauv sealing siab thiab tsis muaj peev xwm kaw. Piv txwv li, roj hmab yuav plam tag nrho nws elasticity thiab ua glassy, ​​poob nws cov khoom sealing thaum qhov kub thiab txias yog qis dua iav hloov kub; Hauv LNG nruab nrab, roj hmab tseem muaj cov khoom ua npuas ncauj thiab tsis tuaj yeem siv rau LNG li qub. Tsis tas li ntawd, qhov kub thiab txias kuj tseem tuaj yeem ua rau muaj kev ntxhov siab tsawg ntawm cov khoom tawg. Piv txwv li, austenitic stainless hlau, uas yog Ameslikas nyob rau hauv ib tug metastable lub xeev ntawm qhov kub thiab txias, transforms mus rau hauv martensite thaum lub kub poob qis dua theem hloov pauv. Lub ntim hloov ua rau muaj kev ntxhov siab nyob rau hauv, ua rau lub sealing nto rau warp thiab deform, ua rau sealing tsis ua hauj lwm.

Txo kev sealing kev ua tau zoo ua rau nruab nrab to

Yog qhov kub thiab txiaspob valvesiv cov hlau rau cov khoom siv tsis yog hlau sib khi, cov khoom tsis yog hlau yuav dhau los ua tawv thiab nkig ntawm qhov kub thiab txias, poob nws lub zog, ua rau cov dej txias thiab kev ntxhov siab, thiab txo qhov kev sib khi ua haujlwm. Txawm li cas los xij, tam sim no thaum tsim cov valve uas tsis tshua muaj kub, cov khoom siv tsis yog xim hlau feem ntau tsis siv thaum kub qis dua -70 ℃, lossis lawv tau ua tiav rau hauv cov hlau thiab cov hlau tsis sib xyaw. Nyob rau tib lub sijhawm, qhov tsis sib xws los ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv los yog qhov sib txawv ntawm lub cev ntawm cov khoom sib txawv kuj tuaj yeem tsim kom muaj qhov kub thiab txias, ua rau muaj kev cuam tshuam ntawm elasticity los yog irreversible distortion deformation ntawm sealing nto, uas cuam tshuam rau sealing nyhuv.

Tshwj xeeb tsim tshwj xeeb uas tsis tshua muaj kub pob valve tuaj yeem hloov kho rau qhov chaw uas muaj qhov kub thiab txias

Txhawm rau tiv thaiv qhov kev sib tw ntawm qhov kub thiab txias, lub pob valve uas tsis tshua muaj kub tau txais kev tsim tshwj xeeb. Yog tias lub caj dab ntev ntev siv los tiv thaiv lub thawv ntim khoom thiab khaws cia kom deb ntawm qhov kub thiab txias kom ntseeg tau tias cov khoom sib khi ntawm cov khoom ntim, cov ntaub ntawv rwb thaiv tsev txias kuj tuaj yeem muab qhwv los tiv thaiv lub zog txias; Thaum ua haujlwm kub qis dua -100 ℃, cov khoom siv valve yog kho nrog chrome plating lossis nitriding los txhim kho qhov tawv tawv thiab txhim khu kev ntseeg tau ntawm cov ntim ntim; Nruab nrog ib tug qauv los tiv thaiv qhov txawv txav siab, thaum lub siab nyob rau hauv lub valve chamber nce, lub chamber thiab inlet txuas los yog ib tug siab nyem valve yog ntsia rau ntawm qhov kawg inlet kom ruaj ntseg siv; Lub gasket siv tau muaj kev ruaj ntseg kaw thiab muaj kev tiv thaiv nyob rau hauv chav tsev kub, tsis tshua muaj kub, thiab kub hloov.