Valve yothandizira chitetezo, yomwe imadziwikanso kuti valavu yotetezera chitetezo, ndi chipangizo chodzitetezera chokha chomwe chimayendetsedwa ndi kuthamanga kwapakati. Itha kugwiritsidwa ntchito ngati valavu yachitetezo komanso valavu yothandizira kutengera momwe ikugwiritsidwira ntchito.

Potengera chitsanzo cha Japan, pali matanthauzo ochepa omveka bwino a mavavu oteteza chitetezo ndi ma valve othandizira. Nthawi zambiri, zida zotetezera zomwe zimagwiritsidwa ntchito paziwiya zazikulu zosungira mphamvu zosungira mphamvu monga ma boilers zimatchedwa ma valve otetezera, ndipo zomwe zimayikidwa pamapaipi kapena malo ena amatchedwa ma valve othandizira. Komabe, malinga ndi zomwe "Technical Standards for Thermal Power Generation" ya Unduna wa Zamalonda Padziko Lonse ndi Makampani aku Japan, mbali zofunika zachitetezo chazida zimatsimikizira kugwiritsa ntchito ma valve otetezeka, monga ma boilers, superheaters, reheaters, etc. M'madera omwe mbali yapansi ya valve yochepetsera mphamvu iyenera kulumikizidwa ndi boiler ndi turbine, valve yothandizira kapena valavu yotetezera iyenera kuikidwa. Mwa njira iyi, valavu yotetezera imafuna kudalirika kwambiri kuposa valve yothandizira.

Kuonjezera apo, kuchokera ku malamulo oyendetsera gasi othamanga kwambiri a Unduna wa Zantchito ku Japan, malamulo a Unduna wa Zoyendetsa ndi mayanjano a zombo pamagawo onse, chizindikiritso ndi malamulo a kuchuluka kwa kutulutsa kotetezeka, timatcha valavu yomwe imatsimikizira kutulutsa. voliyumu valavu yotetezera, ndi valavu yomwe sikutsimikizira kuchuluka kwa kutulutsa valavu yothandizira. Ku China, kaya ndi yotseguka kapena yotseguka yaying'ono, imatchedwa valavu yachitetezo.

1. Mwachidule

Ma valve otetezeka ndi zida zofunika zotetezera ma boilers, zotengera zokakamiza ndi zida zina zokakamiza. Kudalirika kwa ntchito yawo ndi ubwino wa ntchito zawo zimagwirizana mwachindunji ndi chitetezo cha zipangizo ndi ogwira ntchito, ndipo zimagwirizana kwambiri ndi kusunga mphamvu ndi kuteteza chilengedwe. Komabe, ena ogwiritsa ntchito ndi madipatimenti apangidwe nthawi zonse amasankha mtundu wolakwika posankha. Pachifukwa ichi, nkhaniyi ikuwunikira kusankha kwa ma valve otetezera.

2. Tanthauzo

Zomwe zimatchedwa ma valve otetezera nthawi zambiri zimakhala ndi ma valve othandizira. Kuchokera pamalamulo oyang'anira, ma valve omwe amayikidwa mwachindunji pa ma boilers a nthunzi kapena mtundu wa zotengera zokakamiza ayenera kuvomerezedwa ndi dipatimenti yoyang'anira ukadaulo. M'lingaliro lopapatiza, amatchedwa ma valve otetezera, ndipo ena amatchedwa ma valve othandizira. Ma valve otetezeka ndi ma valve othandizira ndi ofanana kwambiri pamapangidwe ndi ntchito. Onse a iwo amangotulutsa sing'anga yamkati pomwe kuthamanga kotsegulira kumadutsa kuti zitsimikizire chitetezo cha zida zopangira. Chifukwa cha kufanana kofunikiraku, anthu nthawi zambiri amasokoneza awiriwa akamagwiritsa ntchito. Kuphatikiza apo, zida zina zopangira zimanenanso kuti mtundu uliwonse ukhoza kusankhidwa m'malamulo. Choncho, kusiyana pakati pa awiriwa nthawi zambiri kumanyalanyazidwa. Zotsatira zake, pamakhala mavuto ambiri. Ngati tikufuna kupereka tanthauzo lomveka bwino la awiriwa, titha kuwamvetsetsa molingana ndi tanthauzo la gawo loyamba la ASME Boiler ndi Pressure Vessel Code:

(1)Valve chitetezo, chipangizo chodzitetezera chodziwikiratu chomwe chimayendetsedwa ndi kuthamanga kwapakati kwapakati kutsogolo kwa valve. Zimadziwika ndi kutsegulira kwathunthu ndi kutsegula mwadzidzidzi. Amagwiritsidwa ntchito popanga gasi kapena nthunzi.

(2)Valve yothandizira, yomwe imadziwikanso kuti valavu yowonjezereka, ndi chipangizo chothandizira chothandizira chomwe chimayendetsedwa ndi kuthamanga kwapakati kwapakati kutsogolo kwa valve. Imatsegula molingana ndi kuwonjezeka kwa mphamvu yoposa mphamvu yotsegulira. Amagwiritsidwa ntchito kwambiri popanga madzimadzi.