Posachedwapa, msonkhano wa Jinbin wamaliza maoda angapo a mavavu a mpira omata. Thevalavu ya mpira yotsekedwa kwathunthuamatengera Integrated welded kapangidwe. Thupi la valve limapangidwa ndi kuwotcherera ma hemispheres awiri. Chigawo chapakati chamkati ndi mpira wokhala ndi zozungulira kupyolera mu dzenje, zomwe zimagwirizanitsidwa ndi actuator yakunja kupyolera mu tsinde la valve. Pamene ntchito, ndimpira wa valve flangetsinde imayendetsedwa kuti izungulire kudzera pa chogwirira, gearbox kapena chipangizo chamagetsi / pneumatic.

Ubwino wogwiritsa ntchito valavu ya mpira wowotcherera mokwanira:

1. Mapangidwe odalirika ndi ntchito yosindikiza mwamphamvu

Njira yonse yowotcherera imachotsa ziwopsezo zowotcherera zamalumikizidwe achikhalidwe cha flange ndipo ndizoyenera kugwirira ntchito movutikira monga kuthamanga kwambiri, kuyaka komanso kuphulika (mwachitsanzo, kukakamiza kwa mapaipi amafuta achilengedwe kumatha kufikira 10MPa). Zida zosindikizira sizimva kuvala ndipo zimakhala ndi moyo wautumiki wazaka zopitilira 10, zomwe zimachepetsa kukonzanso pafupipafupi.

2. Kutsika kochepa kukana ndi ndime yonse

Kuzungulira kwa dzenje kumagwirizana ndi kukula kwa mkati mwa chitoliro, ndipo kukana kwapakati kwa sing'anga ndi 1/10 yokha ya chitoliro chautali womwewo, kuchepetsa kugwiritsa ntchito mphamvu. Ndikoyenera makamaka mayendedwe othamanga kwambiri (mwachitsanzo, chitoliro cha mapaipi amafuta osakanizidwa amatha kufika 1200mm).

3. Zosachita dzimbiri komanso zosinthika kumadera ovuta

Thupi la valve ya mpira wosapanga dzimbiri limakutidwa ndi chitsulo chosapanga dzimbiri kapena zokutira za carbon steel anti-corrosion (monga epoxy resin), zomwe zimatha kukana kuwononga nthaka ndi kukokoloka kwa madzi a m'nyanja, ndipo ndizoyenera zochitika zovuta monga pansi pa nthaka ndi pansi pa madzi.

4. Yosavuta kugwiritsa ntchito komanso yotsika mtengo yokonza

Kuzungulira 90 ° kumatha kumaliza kutsegula ndi kutseka. Kuphatikizidwa ndi makina owongolera okha, kuwongolera kwakutali kumatha kukwaniritsidwa. Zomangamanga zowotcherera zimachepetsa magawo osuntha, zimakhala ndi kulephera kochepa, ndipo kuwongolera kumatha kupitilira zaka zoposa zisanu.

Zochitika zenizeni zogwiritsira ntchito valavu yolumikizidwa bwino ndi injini:

Njira yamapaipi akutali

Kutumiza kwa gasi wachilengedwe - komwe kumagwiritsidwa ntchito m'mizere ya thunthu la gasi (monga West-East Gas Pipeline) ndi mapaipi opatsira gasi am'madzi am'madzi, amatha kupirira kuthamanga kwambiri ndikuwonetsetsa kusindikiza kwanthawi yayitali kuti apewe ngozi zachitetezo zomwe zimayambitsidwa ndi kutayikira kwa gasi.

Kuyendera kwamafuta osakhazikika / oyengedwa bwino - Kuwongolera kayendedwe ka sing'anga m'mapaipi amafuta odutsa malire, kapangidwe kake kodzaza kumachepetsa kusungika kwamafuta ndi kutsika kwamafuta, ndikuwongolera kuyendetsa bwino.

2. Gasi wa m'tauni ndi makina otenthetsera mapaipi

Imayikidwa m'manda ndikuyika payipi yayikulu yamatauni kuti ithane ndi kukhazikika kwa nthaka ndi kusintha kwa kusiyana kwa kutentha ndikuchepetsa chiopsezo cha kutayikira. Lamulirani madzi otentha akuyenda pakatikati pa kutentha kwapakati, ndikupirira kuthamanga kwambiri (1.6MPa) ndi kutentha kwakukulu (120 ℃).

3. Munda wa mafakitale

Makampani opanga mankhwala: Kunyamula zinthu zowononga monga ma asidi amphamvu ndi ma alkali amphamvu. Zida zazitsulo zosapanga dzimbiri ndi zida zomata mwamphamvu zachitsulo zimatsimikizira chitetezo (monga hydrochloric acid ndi mapaipi a soda).

Metallurgy ndi mphamvu: Itha kuletsa mwachangu kutuluka kwa gasi mu mapaipi ophulika a ng'anjo yamoto kapena kuwongolera kuchuluka kwa madzi oziziritsa mapaipi amagetsi amagetsi otenthetsera, kutengera kutentha kwambiri (pamwamba pa 300 ℃) ndi malo afumbi.

4. Umisiri wa Marine ndi Zombo

Amagwiritsidwa ntchito pamapaipi amafuta papulatifomu yakunyanja ndi makina amafuta a sitima, osagwirizana ndi dzimbiri lamadzi am'nyanja komanso amatha kupirira kugwedezeka kwa zombo, ndipo amagwirizana ndi miyezo yapadziko lonse lapansi monga API 6D.

Valavu yopangidwa bwino ndi mpira Pn16, yodalirika kwambiri, yotsika mtengo yokonza komanso kusinthasintha kwa magwiridwe antchito, yakhala gawo lowongolera pakufalitsa mphamvu, njira zamafakitale ndi zomangamanga, makamaka zosasinthika m'mapaipi akuluakulu omwe amafunikira nthawi yayitali yokhazikika.