Thaum siv lub valve, feem ntau muaj qee qhov teeb meem ntxhov siab, suav nrog lub valve tsis raug kaw tag nrho. Kuv yuav ua li cas? Lub valve tswj muaj ntau yam ntawm cov khoom xau sab hauv vim nws hom valve cov qauv tsis yooj yim. Niaj hnub no, peb yuav tham txog xya yam sib txawv ntawm kev tswj lub valve thiab kev tshuaj xyuas thiab kho rau txhua tus.

1. Lub valve tsis tau kaw rau nws qhov siab tshaj plaws thiab tus actuator qhov chaw teeb tsa xoom tsis raug.

Kev daws:

1) Manually kaw lub valve (txhais tias nws yog kiag li kaw);

2) Rov qhib lub valve manually, yog tias lub zog me me tsis tuaj yeem siv los tig nws;

3) Tig lub valve ib nrab tig nyob rau hauv qhov opposite direction;

4) Tom ntej no, hloov qhov txwv sab saud.

2. Lub actuator lub thrust tsis txaus.

Lub actuator lub thrust yog tsis txaus vim hais tias lub valve yog ntawm lub laub-down kaw ntau yam. Thaum tsis muaj qhov siab, nws yooj yim kom tau mus rau qhov chaw kaw tag nrho, tab sis thaum muaj qhov siab, qhov nce siab ntawm cov kua tsis tuaj yeem tiv thaiv, ua rau nws tsis tuaj yeem kaw tag nrho.

Kev daws: hloov lub siab-thrust actuator, lossis hloov mus rau qhov sib npaug sib npaug kom txo qhov tsis sib npaug ntawm qhov nruab nrab

3. Internal to coj los ntawm cov hluav taws xob tswj tsis zoo valve kev tsim kho

Vim tias cov tuam txhab lag luam valve tsis nruj me ntsis tswj cov khoom siv valve, kev siv thev naus laus zis, kev sib dhos tshuab, thiab lwm yam thaum lub sijhawm tsim khoom, lub sealing nto tsis yog hauv av rau tus qauv siab thiab qhov tsis zoo xws li pitting thiab trachoma tsis raug tshem tawm tag nrho, ua rau muaj kev nkag mus rau sab hauv. hluav taws xob tswj valve.

Kev daws: Reprocess lub sealing nto

4. Lub tshuab hluav taws xob tswj valve qhov kev tswj xyuas muaj feem cuam tshuam rau lub valve sab hauv to.

Cov txheej txheem tswj kev siv tshuab, suav nrog lub valve txwv hloov pauv thiab dhau lub zog hloov pauv, yog txoj hauv kev ib txwm siv los ua haujlwm hluav taws xob tswj valve. Qhov chaw ntawm lub valve yog qhov tsis meej, lub caij nplooj ntoos hlav tau hnav, thiab cov coefficient ntawm thermal expansion tsis sib xws vim tias cov khoom tswj tau cuam tshuam los ntawm ib puag ncig kub, siab, thiab av noo. thiab lwm yam xwm txheej sab nraud, uas yog los liam rau lub tshuab hluav taws xob tswj lub valve sab hauv.

Kev daws: kho qhov txwv.

5. Internal leakage coj los ntawm cov teeb meem nrog cov hluav taws xob tswj valve qhov teeb meem

Nws yog ib qho tseem ceeb rau hluav taws xob tswj li qub kom tsis txhob qhib tom qab kaw manually, uas yog tshwm sim los ntawm kev ua thiab kev sib dhos txheej txheem. Txoj haujlwm ua haujlwm ntawm qhov kev txwv sab sauv thiab qis qis tuaj yeem siv los kho cov hlab ntsha ntawm lub tshuab hluav taws xob tswj valve. Yog tias qhov mob stroke raug kho me me, qhov hluav taws xob tswj valve yuav tsis kaw nruj nreem lossis qhib; Yog tias qhov mob stroke raug kho loj dua, nws yuav ua rau ntau dhau ntawm lub zog hloov lub zog tiv thaiv mechanism;

Yog tias qhov kev hloov pauv ntau dhau qhov kev txiav txim siab yog nce, yuav muaj kev sib tsoo uas tuaj yeem ua mob rau lub valve lossis txo qis kev sib kis, lossis tseem hlawv lub cev muaj zog. Feem ntau, tom qab hluav taws xob tswj valve tau debugged, qhov qis qis hloov txoj hauj lwm ntawm lub qhov rooj hluav taws xob yog teem los ntawm manually co lub hluav taws xob tswj valve mus rau hauv qab, ua raws li los ntawm co nws nyob rau hauv lub qhib kev taw qhia, thiab lub sab sauv txwv yog teem los ntawm manually. co lub zog tswj valve mus rau qhov qhib siab.

Yog li, hluav taws xob tswj valve yuav tsis raug tiv thaiv los ntawm kev qhib tom qab kaw nruj nreem ntawm tes, tso cai rau lub qhov rooj hluav taws xob qhib thiab kaw dawb, tab sis nws yuav yog qhov tseem ceeb ua rau sab hauv ntawm lub qhov rooj hluav taws xob. Txawm hais tias qhov hluav taws xob tswj valve tau teeb tsa zoo kawg nkaus, txij li qhov kev txwv hloov txoj haujlwm feem ntau yog kho, qhov nruab nrab nws tswj yuav tsis tu ncua ntxuav thiab hnav lub valve thaum nws siv, uas yuav ua rau sab hauv los ntawm lub valve slack kaw.

Kev daws: kho qhov txwv.

6. Cavitation Lub sab hauv ntawm cov hluav taws xob tswj valve yog tshwm sim los ntawm corrosion ntawm lub valve coj los ntawm kev xaiv yam tsis raug.

Cavitation thiab siab sib txawv yog txuas nrog. Cavitation yuav tshwm sim yog tias qhov tseeb qhov sib txawv P ntawm lub valve siab dua qhov tseem ceeb ntawm qhov sib txawv Pc rau cavitation. Ib qho tseem ceeb ntawm lub zog yog tsim nyob rau hauv cov txheej txheem cavitation thaum lub npuas tawg, uas muaj kev cuam tshuam rau lub rooj zaum valve thiab lub valve core. Lub valve dav siv nyob rau hauv cavitation tej yam kev mob rau peb lub hlis los yog tsawg dua, txhais tau hais tias lub valve raug kev txom nyem los ntawm cavitation corrosion hnyav, uas ua rau cov dej ntws ntawm lub rooj zaum valve mus txog 30% ntawm cov rated flow. Throttling Cheebtsam muaj qhov cuam tshuam loj heev. Qhov kev puas tsuaj no kho tsis tau.

Yog li ntawd, cov kev cai tshwj xeeb rau hluav taws xob li qub sib txawv nyob ntawm seb lawv xav siv. Nws yog ib qho tseem ceeb uas yuav tau xaiv cov hluav taws xob tswj li qub kom ntse raws li cov txheej txheem system.

Kev daws: Txhawm rau txhim kho cov txheej txheem, xaiv ntau theem kauj ruam-down lossis lub tes tsho tswj valve.

7. Internal to tshwm sim los ntawm nruab nrab deterioration thiab kev laus ntawm cov hluav taws xob tswj valve

Tom qab lub tshuab hluav taws xob tswj valve tau hloov kho, tom qab qee qhov kev ua haujlwm, lub tshuab hluav taws xob tswj lub valve yuav raug kaw vim tias cov hlab ntsha loj dhau los ntawm lub valve cavitating, qhov nruab nrab eroding, lub valve tseem ceeb thiab lub rooj zaum hnav, thiab kev laus ntawm cov khoom siv sab hauv. Qhov nce ntawm cov hluav taws xob tswj valve qhov to yog qhov tshwm sim ntawm laxness phenomena. Lub tshuab hluav taws xob tswj lub valve lub hauv paus xau yuav nce zuj zus zuj zus mus rau lub sijhawm.

Kev daws: kho tus actuator thiab ua haujlwm tsis tu ncua thiab calibration.