Seb qhov kev sib txuas ntawm lubvalvethiab covcov kav dejlos yog cov khoom siv yog qhov tseeb thiab tsim nyog yuav cuam tshuam ncaj qha rau qhov tshwm sim ntawm lub raj xa dej valve khiav, pheej hmoo, dripping thiab to.
1. Flange kev twb kev txuas
Flanged kev twb kev txuas yog lub cev valve nrog flanges ntawm ob qho kawg, sib haum rau cov flanges ntawm lub raj xa dej, los ntawm bolting lub flange ntsia hauv lub raj xa dej. Flanged kev twb kev txuas yog feem ntau siv hom valve kev twb kev txuas. Flanges muaj convex (RF), dav hlau (FF), convex thiab concave (MF) thiab lwm cov ntsiab lus. Raws li cov duab ntawm qhov sib koom ua ke, nws tuaj yeem muab faib ua cov hauv qab no:
(1) hom du: rau lub valve uas tsis tshua muaj siab. Kev ua haujlwm yooj yim dua;
(2) concave thiab convex hom: siab ua hauj lwm siab, siv tau lub zog gasket;
(3) tenon groove hom: gasket nrog cov yas loj deformation tuaj yeem siv dav hauv corrosive media, thiab cov nyhuv sealing zoo dua;
(4) trapezoidal groove hom: oval hlau nplhaib li gasket, siv nyob rau hauv lub valve ua hauj lwm siab ≥64 kg / cm2, los yog kub kub valve;
(5) Lens hom: lub gasket yog nyob rau hauv cov duab ntawm lub lens, ua los ntawm hlau. Siv rau kev kub siab li qub nrog kev ua haujlwm siab ≥ 100kg / cm2, lossis siab kub li qub;
(6) O-ring hom: qhov no yog ib daim ntawv tshiab ntawm flange kev twb kev txuas, nws yog nrog cov tshwm sim ntawm tag nrho cov hom ntawm cov roj hmab O-ring, thiab tsim, nws yog ntau txhim khu kev qha nyob rau hauv sealing nyhuv tshaj lub pav ca gasket.
(1) Kev sib txuas ntawm lub taub qab vuam: ob qhov kawg ntawm lub cev valve tau ua tiav rau hauv lub taub qab vuam zawj raws li qhov yuav tsum tau ua ntawm pob tw vuam, sib haum rau cov yeeb nkab vuam zawj, thiab tsau rau ntawm cov kav dej los ntawm vuam.
(2) lub qhov (socket) welding kev twb kev txuas: ob qhov kawg ntawm lub valve lub cev yog ua tiav raws li qhov yuav tsum tau muaj ntawm lub qhov (socket) vuam thiab txuas nrog cov kav dej los ntawm qhov (socket) vuam.
Threaded kev twb kev txuas yog ib txoj kev yooj yim ntawm kev sib txuas thiab feem ntau yog siv rau cov li qub me me. Lub cev lub cev yog ua tiav raws li tus qauv xov, thiab muaj ob hom xov sab hauv thiab xov sab nraud. Sib raug rau cov xov ntawm cov yeeb nkab. Threaded kev twb kev txuas tau muab faib ua ob qhov xwm txheej:
(1) ncaj qha sealing: cov xov sab hauv thiab sab nraud ncaj qha ua lub luag haujlwm sealing. Txhawm rau kom ntseeg tau tias qhov sib koom ua ke tsis xau, feem ntau nrog cov roj lead, hemp thiab PTFE raw khoom filling siv; Ntawm lawv, PTFE raw khoom siv yog dav siv. Cov khoom siv no muaj kev tiv thaiv zoo corrosion, zoo heev sealing nyhuv, yooj yim rau siv thiab khaws cia, thaum disassembly, nws yuav raug tshem tawm tag nrho, vim hais tias nws yog ib txheej ntawm cov zaj duab xis uas tsis yog-viscous, zoo dua li cov roj txhuas, hemp.
(2) indirect sealing: lub zog ntawm cov ntsia hlau nruj yog xa mus rau lub gasket ntawm ob lub dav hlau, kom lub gasket plays lub luag hauj lwm sealing.
Muaj tsib hom kev siv threads:
(1) Metric ntau xov;
(2) Ntiv tes xov;
(3) Xov sealing yeeb nkab xov;
(4) non-threaded sealing yeeb nkab xov;
(5) American standard yeeb nkab threads.
General kev taw qhia yog raws li nram no:
① Cov txheej txheem thoob ntiaj teb ISO228/1, DIN259, rau sab hauv thiab sab nraud thaum sib txuas xov, code G lossis PF (BSP.F);
② German tus qauv ISO7/1, DIN2999, BS21, rau cov hniav sab nrauv, sab hauv cov hniav sib txuas xov, code BSP.P lossis RP/PS;
③ British tus qauv ISO7/1, BS21, sab hauv thiab sab nraud taper xov, code PT lossis BSP.TR lossis RC;
④ Asmeskas tus qauv ANSI B21, sab hauv thiab sab nraud taper xov, code NPT G(PF), RP(PS), RC (PT) hniav Lub kaum sab xis yog 55 °, NPT hniav Lub kaum sab xis yog 60 ° BSP.F, BSP.P thiab BSP. TR sau ua ke hu ua BSP cov hniav.
Muaj tsib hom qauv yeeb nkab xov hauv Tebchaws Meskas: NPT rau kev siv dav dav, NPSC rau cov yeeb nkab ncaj nraim rau kev sib txuas, NPTR rau kev taw qhia kev sib txuas, NPSM rau cov yeeb nkab ncaj rau cov khoom siv sib txuas (xws li kev sib txuas tsis siv neeg), thiab NPSL rau xoob haum mechanical kev twb kev txuas nrog xauv ceev. Nws belongs rau cov tsis-threaded kaw yeeb nkab xov (N: American lub teb chaws tus qauv; P: yeeb nkab; T: Taper)
4 .Taper kev twb kev txuas
Lub hauv paus ntsiab lus ntawm kev sib txuas thiab kev sib khi ntawm lub tes tsho yog tias thaum lub txiv ntoo tau nruj, lub tes tsho yog nyob rau hauv siab, kom cov ntug me ntsis rau hauv cov phab ntsa ntawm cov yeeb nkab, thiab lub khob hliav qab ntawm lub tes tsho yog nruj nreem kaw nrog lub khob hliav qab. sib koom ua ke lub cev nyob rau hauv siab, yog li nws muaj peev xwm ntseeg tau los tiv thaiv to. Xws liinstrumentation li qub.Qhov zoo ntawm hom kev sib txuas no yog:
(1) Cov ntim me me, lub teeb yuag, qauv yooj yim, yooj yim disassembly thiab sib dhos;
(2) muaj zog relay, ntau yam kev siv, tuaj yeem tiv taus siab (1000 kg / square centimeter), kub siab (650 ℃) thiab cuam tshuam kev co;
(3) tuaj yeem xaiv ntau yam khoom siv, haum rau kev tiv thaiv corrosion;
(4) qhov tseeb machining tsis siab;
(5) yooj yim rau nruab ntawm qhov siab siab.
5. Clamp kev twb kev txuas
Nws yog txoj kev sib txuas ceev uas yuav tsum tau tsuas yog ob lub bolts thiab tsim nyog rau cov valve uas tsis tshua muaj siab uas feem ntau raug tshem tawm.
Post lub sij hawm: Feb-22-2022