Kodi Valve Pneumatic Actuator ndi chiyani?

Choyendetsa mpweya ndi chipangizo chomwe chimagwiritsa ntchito mphamvu ya mpweya kuyendetsa kutsegula, kutseka kapena kuwongolera valavu. Chimatchedwanso choyendetsa mpweya kapena chipangizo choyendetsa mpweya. Nthawi zina ma actuator a pneumatic amakhala ndi zida zina zothandizira. Zomwe zimagwiritsidwa ntchito kwambiri ndi ma valve positioners ndi ma handwheel mechanisms. Ntchito ya valve positioner ndikugwiritsa ntchito mfundo yowunikira kuti igwire bwino ntchito ya actuator kuti actuator ikwaniritse malo olondola malinga ndi chizindikiro chowongolera cha wowongolera. Ntchito ya handwheel mechanism ndikugwiritsa ntchito mwachindunji kuyendetsa valvu yowongolera kuti isunge bwino ntchito pamene makina owongolera alephera chifukwa cha kuzima kwa magetsi, kuzima kwa mpweya, kusatulutsa kwa wowongolera kapena kulephera kwa actuator.

Mfundo Yogwira Ntchito ya Actuator ya Pneumatic

Mpweya wopanikizika ukalowa mu actuator ya pneumatic kuchokera ku nozzle A, mpweya umakankhira ma piston awiri kuti ayende molunjika ku malekezero onse awiri (malekezero a mutu wa silinda), ndipo choyimitsa pa piston chimayendetsa giya pa shaft yozungulira kuti izungulire madigiri 90 motsutsana ndi wotchi, ndipo valavu imatsegulidwa. Panthawiyi, mpweya womwe uli kumapeto onse a actuator ya pneumatic umatuluka kuchokera ku nozzle B. M'malo mwake, mpweya wopanikizika ukalowa kumapeto awiri a actuator ya pneumatic kuchokera ku nozzle ya B, mpweya umakankhira piston iwiri kuti iyende molunjika pakati, ndipo choyimitsa pa piston chimayendetsa giya pa shaft yozungulira kuti izungulire madigiri 90 molunjika ndi wotchi, ndipo valavu imatsekedwa. Panthawiyi, mpweya womwe uli pakati pa actuator ya pneumatic umatuluka kuchokera ku nozzle ya A. Izi ndi mfundo yotumizira ya mtundu wamba. Malinga ndi zosowa za ogwiritsa ntchito, actuator ya pneumatic ikhoza kuyikidwa ndi mfundo yotumizira yosiyana ndi mtundu wamba, ndiko kuti, mzere wosankhidwa umazungulira molunjika ndi wotchi kuti utsegule valavu, ndikuzungulira mozungulira ndi wotchi kuti utseke valavu. Nozzle ya A ya actuator ya pneumatic yomwe imagwira ntchito kamodzi (mtundu wobwerera kwa masika) ndi malo olowera mpweya, ndipo nozzle ya B ndi dzenje lotulutsira mpweya (nozzle ya B iyenera kuyikidwa ndi choletsa mpweya). Malo olowera mpweya a A amatsegula valavu, ndipo mphamvu ya masika imatseka valavu mpweya ukadulidwa.

Kugwira Ntchito kwa Actuator ya Pneumatic

1. Mphamvu yotulutsa yovomerezeka kapena mphamvu ya chipangizo cha pneumatic iyenera kutsatira malamulo apadziko lonse lapansi komanso a makasitomala

2. Pansi pa mikhalidwe yopanda katundu, silinda imalowetsedwa ndi mpweya womwe wafotokozedwa mu “Table 2”, ndipo kayendedwe kake kayenera kukhala kosalala popanda kugwedezeka kapena kukwawa.

3. Pansi pa mpweya wa 0.6MPa, mphamvu yotulutsa kapena kupondereza kwa chipangizo chopondereza mpweya m'njira zonse ziwiri zotsegulira ndi zotsekera sizikhala zochepera mtengo womwe wawonetsedwa pa dzina la chipangizo chopondereza mpweya, ndipo zochita zake ziyenera kukhala zosinthasintha, ndipo palibe kusintha kosatha kapena zochitika zina zachilendo zomwe zidzachitike m'mbali iliyonse.

4. Pamene mayeso otsekera akuchitika ndi mphamvu yogwira ntchito kwambiri, kuchuluka kwa mpweya wotuluka kuchokera kumbali iliyonse ya mphamvu yakumbuyo sikuyenera kupitirira (3+0.15D)cm3/min (mkhalidwe wokhazikika); kuchuluka kwa mpweya wotuluka kuchokera kumapeto kwa chivundikiro ndi shaft yotuluka sikuyenera kupitirira (3+0.15d)cm3/min.

5. Kuyesa mphamvu kumachitika ndi kuthamanga kwakukulu kopitilira 1.5 kuposa kuthamanga kwakukulu kogwira ntchito. Pambuyo posunga kuthamanga koyeserera kwa mphindi zitatu, chivundikiro cha silinda ndi zida zotsekera zosasinthika siziloledwa kukhala ndi kutuluka kwa madzi ndi kusintha kapangidwe kake.

6. Chiwerengero cha nthawi yogwira ntchito, chipangizo chopopera mpweya chimatsanzira ntchito ya valavu yopopera mpweya. Pokhala ndi mphamvu yotulutsa mphamvu kapena mphamvu yopopera mbali zonse ziwiri, chiwerengero cha ntchito zotsegulira ndi kutseka sichiyenera kupitirira nthawi 50,000 (nthawi imodzi yotsegulira ndi kutseka).

7. Pa zipangizo zoyendera mpweya zomwe zili ndi njira zotetezera mpweya, pisitoni ikasuntha kupita kumapeto kwa sitiroko, kugwedezeka sikuloledwa.

Ubwino wa Oyendetsa Ma Pneumatic

1. Landirani zizindikiro za mpweya wopitirira ndi kusuntha kwa mzere wotuluka (mutawonjezera chipangizo chosinthira magetsi/gasi, chingathenso kulandira zizindikiro zamagetsi zopitirira). Zina zimatha kutulutsa kusuntha kwa angular pambuyo poti zili ndi mkono wogwedezeka.

2. Pali ntchito zabwino ndi zoipa.

3. Liwiro loyenda ndi lalikulu, koma liwiro lidzachepa pamene katundu akuwonjezeka.

4. Mphamvu yotulutsa imagwirizana ndi kuthamanga kwa ntchito.

5. Kudalirika kwambiri, koma valavu singathe kusungidwa pambuyo poti gwero la mpweya lasokonezedwa (likhoza kusungidwa pambuyo poti lawonjezeredwa valavu yosunga malo).

6. N'kovuta kuchita zinthu zoyang'anira ndi kulamulira pulogalamu m'magulu.

7. Kusamalira kosavuta komanso kusinthasintha bwino malinga ndi chilengedwe.

8. Mphamvu yayikulu yotulutsa.

9. Ili ndi ntchito yoteteza kuphulika.

Mu Chilimwe

Miyeso yokhazikitsa ndi kulumikiza ma actuator ndi ma valve a pneumatic imapangidwa motsatira miyezo yapadziko lonse lapansi ya ISO5211, DIN3337 ndi VDI/VDE3845, ndipo imatha kusinthidwa ndi ma actuator wamba a pneumatic.
Bowo lochokera ku mpweya likutsatira muyezo wa NAMUR.
Bowo lolumikizira shaft pansi pa actuator ya pneumatic (yogwirizana ndi muyezo wa ISO5211) ndi lalikulu kawiri, lomwe ndi loyenera kuyika ma valve okhala ndi ndodo zazikulu kapena zolunjika za 45°.