Taw qhia
Cov kav dej yog siv dav hauv ntau yam lag luam, nrog rau kev tsim kho, kav dej, thiab kev tsim khoom. Lawv yog cov cuab yeej siv tau zoo rau kev thauj cov kua thiab roj, thiab lawv tuaj ntawm cov khoom sib txawv, cov duab, thiab qhov ntau thiab tsawg. Ib qho tseem ceeb ntawm cov kav dej yog cov yeeb nkab txuas. Cov yeeb nkab txuas txuas txuas rau ib leeg kom lawv tuaj yeem tsim cov kav dej txuas ntxiv. Yog tsis muaj cov yeeb nkab sib txuas, cov kav dej yuav tsis tuaj yeem xa cov kua dej thiab cov pa roj. Cov yeeb nkab sib txuas tso cai rau kev ua kom yooj yim, nthuav dav, kev cog lus, thiab kev sib tw ntawm cov kav dej. Muaj ntau hom yeeb nkab txuas, thiab txhua hom muaj qhov tshwj xeeb zoo, qhov tsis zoo, thiab kev siv. Kab lus no yuav tham txog ntau yam ntawm cov yeeb nkab txuas thiab lawv siv.
Welded sib koom
Lub welded ob leeg muaj ob lub kav dej los yog fittings taub qab-welded ua ke. Butt-welding muaj cua sov qhov kawg ntawm ob lub kav dej los yog fittings thiab ces nias lawv ua ke. Lub tshav kub melts qhov kawg, thiab tom qab txias, ib tug muaj zog thiab ruaj khov daim ntawv cog lus yog tsim. Welded pob qij txha yog qhov muaj zog tshaj plaws ntawm cov yeeb nkab sib koom ua ke thiab feem ntau siv rau hauv cov ntawv thov siab. Welded pob qij txha kuj tsim nyog rau cov kav dej uas thauj cov khoom corrosive thiab phom sij.
Ib qho tsis zoo ntawm cov pob qij txha welded yog tias lawv xav tau cov neeg ua haujlwm txawj ua cov txheej txheem vuam. Tsis tas li ntawd, cov txheej txheem vuam yuav tsum muaj qhov kub thiab txias uas tuaj yeem deform cov kav dej lossis fittings yog tias tsis ua haujlwm kom raug.
Threaded Joint
Lub threaded sib koom yog tsim los ntawm screwing ob lub kav dej los yog fittings ua ke siv threads. Cov xov yog grooves nyob rau hauv qhov kawg ntawm cov kav dej los yog fittings uas tso cai rau lawv kom haum ua ke thiab tsim ib lub foob. Threaded pob qij txha yog ib qho yooj yim rau nruab thiab tshem tawm, ua rau lawv haum rau daim ntaub ntawv uas yuav tsum tau nquag disassembly. Threaded pob qij txha feem ntau yog siv rau hauv cov ntawv thov uas tsis tshua muaj siab, xws li cov kav dej thiab cov kav dej.
Ib qho tsis zoo ntawm threaded pob qij txha yog tias lawv tsis muaj zog li cov pob qij txha welded. Qhov tsis tu ncua screwing thiab unscrewing tuaj yeem ua rau cov xov puas, ua rau xau. Threaded pob qij txha kuj tsis haum rau cov kev siv kub thiab kev kub ntxhov siab vim muaj kev pheej hmoo ntawm kev sib koom ua ke.
Flanged Joint
Lub flanged sib koom ua ke yog tsim los ntawm cov flanges, uas yog cov nplhaib tiaj tus uas muaj cov ntsia hlau qhov nyob ib ncig ntawm lub voj voog. Flanges yog txuas mus rau qhov kawg ntawm cov kav dej los yog fittings, thiab cov bolts yog siv los zawm cov flanges ua ke thiab tsim ib lub foob. Flanged pob qij txha muaj zog thiab yooj yim rau kev sib sau thiab disassemble. Lawv feem ntau siv nyob rau hauv high-pressure thiab high-temperature daim ntaub ntawv, xws li roj thiab roj pipelines.
Ib qho tsis zoo ntawm flanged pob qij txha yog tias lawv loj thiab xav tau ntau qhov chaw. Lawv kuj tseem kim piv rau lwm hom yeeb nkab txuas. Cov bolts siv nyob rau hauv flanged pob qij txha kuj tuaj yeem xoob lub sijhawm, ua rau cov xau.
Compression Joint
Lub compression sib koom ua ke yog tsim los ntawm compressing lub sealing ntawm ob lub kav dej los yog fittings. Cov khoom sib khi feem ntau yog cov roj hmab lossis yas gasket uas yog compressed los ntawm cov txiv ntoo compression lossis ferrule. Compression pob qij txha yog ib qho yooj yim rau nruab thiab tshem tawm thiab tsim nyog rau kev koom nrog cov kav dej ntawm cov khoom sib txawv.
Compression pob qij txha feem ntau yog siv hauv cov kav dej, xws li cov kav dej thiab cov kav dej khib nyiab. Ib qho tsis zoo ntawm cov pob qij txha compression yog tias lawv tuaj yeem xoob lub sijhawm, ua rau cov dej ntws tawm. Cov txiv ntoo compression lossis ferrule tuaj yeem ua rau cov yeeb nkab puas yog tias tsis nruj kom raug.
Ductile Hlau Joint
Cov hlua hlau txuas zoo ib yam li cov flanged sib koom ua ke, tab sis nws yog tsim tshwj xeeb rau cov kav hlau kav hlau. Cov kav dej hlau muaj cov txheej tuab ntawm cov cement mortar, uas ua rau nws nyuaj rau tsim ib lub foob siv cov pa flanges. Cov pob qij txha hlau siv ib qho kev sib koom ua ke uas tuav cov yeeb nkab thiab tsim ib lub foob tsis muaj kev puas tsuaj rau txheej.
Cov khoom siv hlau nplaum feem ntau yog siv rau hauv cov kav dej thiab cov kav dej phwj tuaj. Ib qho tsis zoo ntawm cov pob qij txha hlau yog tias lawv kim piv rau lwm hom yeeb nkab pob qij txha.
Expansion Joint
Lub expansion sib koom ua ke yog tsim los nqus txav thiab kev co hauv cov kav dej. Nws muaj ob txoj hlua txuas nrog flanges lossis fittings. Lub hauv paus yog hloov tau, cia lawv nthuav thiab cog lus thaum cov kav dej txav mus. Cov pob qij txha nthuav dav feem ntau yog siv rau hauv cov kav dej uas thauj cov khoom tsis zoo, xws li chav thiab roj.
Ib qho tsis zoo ntawm cov pob qij txha expansion yog tias lawv kim thiab yuav tsum tau saib xyuas tsis tu ncua. Lub tshuab nqus tsev kuj tuaj yeem ua tsis tau raws sij hawm vim kev qaug zog, ua rau xau.
Xaus
Cov yeeb nkab sib txuas yog cov khoom tseem ceeb ntawm cov kav dej thiab tso cai rau cov kav dej los tsim ib qho kev txuas ntxiv mus. Txhua hom yeeb nkab sib txuas muaj nws qhov zoo, qhov tsis zoo, thiab kev siv. Qhov kev xaiv ntawm cov yeeb nkab sib txuas yog nyob ntawm hom yeeb nkab, cov kua dej los yog roj thauj, kub, siab, thiab qhov chaw. Welded pob qij txha yog qhov muaj zog tshaj plaws thiab tsim nyog rau kev siv siab thiab kev phom sij. Threaded pob qij txha yog ib qho yooj yim rau nruab thiab tshem tawm tab sis tsis haum rau high-pressure thiab high-temperature daim ntaub ntawv. Flanged pob qij txha muaj zog thiab tsim nyog rau kev siv siab thiab kub kub, tab sis yog loj thiab kim. Compression pob qij txha yooj yim rau nruab thiab tshem tawm, tab sis lawv tuaj yeem loosen lub sijhawm. Cov pob qij txha hlau tshwj xeeb yog tsim los rau cov kav hlau tsis huv tab sis kim heev. Cov pob qij txha nthuav dav yog tsim los nqus cov txav thiab kev co hauv cov kav dej thiab tsim nyog rau cov kav dej uas thauj cov khoom tsis zoo.
