Hoʻopuka kēia pepa i ke koi a me ka hoʻohana ʻana i ka valve seal butterfly valve ma ka valve wela haʻahaʻa

Hoʻopuka kēia pepa i ke koi a me ka hoʻohana ʻana i ka valve seal butterfly valve ma ka valve wela haʻahaʻa

Me ka hoʻomohala wikiwiki ʻana o ka ʻoihana petrochemical hou, ʻoihana kemika lanahu a me ka ʻoihana refrigeration, ʻoi aku ka nui o ka hoʻohana ʻana i ka valve wela haʻahaʻa, ʻoi aku ka nui o ka dosage. No laila, ʻo ka hoʻohana pono ʻana o ka valve wela haʻahaʻa ke kumu o ka nānā ʻana o nā kānaka. ʻO ka hoʻohana ʻana i nā kīwaha haʻahaʻa haʻahaʻa me ka hoʻohana maʻamau o nā valve maʻamau, aia kekahi mau koi kūikawā e hoʻolohe ai.
ʻO nā kiwikā cryogenic e pili ana i nā kiwi e hana ana ma nā mahana haʻahaʻa ma lalo o -29 ° C. Hiki i kekahi mau pahu cryogenic ke lawe i nā kinoea wai wai (e like me ka nitrogen, oxygen a me ke kinoea maoli) ma nā mahana haʻahaʻa e like me -196 ° C a mālama mau i ka hana maʻamau.
With the decrease of the temperature of the working medium, the material and structure of the low temperature valve used are different from the conventional universal valve, especially the temperature valve (t Me ka emi ʻana o ka mahana o ka mea hana, ʻokoʻa ka mea a me ke ʻano o ka valve haʻahaʻa haʻahaʻa i hoʻohana ʻia mai ka valve maʻamau, ʻoi aku ka nui o ka valve wela (t I mea e hōʻemi ai i ke kahe wela i nā ʻāpana pani mai waho, pono e wehe ʻia nā ʻāpana hana mai ke kino insulated. No laila, lōʻihi loa ka ʻāʻī o ka pāpale o ka pahu cryogenic. ** Hoʻohana ʻia ka valve wela ma lalo o nā kūlana paʻakikī mai ka wela o waho a i ka mahana. A ke hana nei me ke keakea ole. ʻO ka hoʻopaʻa ʻana o ka ʻāpana pani e hōʻoia pinepine ʻia e ke kaomi pili pono i hoʻokumu ʻia ma ke apo sealing, akā inā paʻa ka ikaika o ka mea hoʻouna, ʻokoʻa paha ka ikaika o ke apo sealing i ka pae wela hana, ʻoiaʻiʻo, ka ʻO ka hana o ke apo sealing material, ʻoi aku ka ʻokoʻa o ka hana o ka mea polymeric. No laila, he koi koʻikoʻi ka valve mehana ma ke apo sealing, e koho maʻamau i nā mea paʻa paʻa (STL) ʻoi aku ka maikaʻi.
He palena iki ka pahu wela ma ka wehe ʻana o ka wikiwiki o ka pani. ʻOiai ʻo nā ana adiabatic, aia nō ke kahe o ka wela ma kahi palena palena, e hopena i ka hoʻokumu ʻana o ka pae wai i kekahi mau wahi o ka ʻōnaehana. No laila, i ka wehe koke ʻana o ka valve, hiki i ka wai ke loaʻa ka wikiwiki nui, i ka manawa e hālāwai ai me nā pilikia a i ʻole ke kūʻē ʻana e like me ke kīpē e hoʻohua ai i ka pā wai, pono e nānā ʻia i ka hoʻohana ʻana.
Hoʻohana maʻamau no ka ʻenehana refrigeration, ʻo ka medium ka nitrogen a i ʻole freon refrigerant, ka mea maʻamau i hoʻohana ʻia i ka pahu hao hao, ʻo kona mahana kūpono ma waena o -28 ~ 150 ℃, hoʻohana liʻiliʻi i kēia manawa, akā ke ulu nei ka valve me ka ferritic ductile iron. ʻO kēia no ka mea ʻoi aku ka maikaʻi o ka ferritic ductile iron i ka paʻakikī, ke kūpaʻa a me ka pale ʻana i ka corrosion.
ʻO ka pahu kila kalapona maʻamau (WCB), kona hoʻohana ʻana i ka mahana he -29 ~ 150 ℃; Aia kekahi haʻahaʻa haʻahaʻa kalapona kila (LCB, LC1, LC2), kona haʻahaʻa haʻahaʻa lawelawe wela -46 ~ -73 ℃; ʻO Austenitic stainless steel (304, 316) he hana maikaʻi loa ia o ke kila pale haʻahaʻa haʻahaʻa, ʻo kona haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa ma lalo o -196 ℃, kekahi no -254 ℃.
General haʻahaʻa wela pani pani 'āpana, ke koho ana o ka metala sila valve noho ma ka valve kino, ke koho ana o ka fluorine plastic (F4) ma ka valve disc,ʻaʻohe koi kūikawā i loko o ka hale a me ka conventional universal valve aneane like. ʻO ke koho kūpono e like me ka mahana a me ka waena.
Cryogenic valve, e noʻonoʻo wale i nā ʻano hana o ka valve wela. Hiki ke hoʻokomo ʻia ma kekahi kūlana i loko o ka incubator, akā pono e waiho ʻia ka pahu hoʻopiha, ka mīkini hana ( huila lima, wrench) a me ka hōʻailona o ke kūlana hoʻokiʻekiʻe valve ma waho o ka incubator. Maʻalahi e hana a pani i ka paʻi. Hoʻokomo ʻia ka hapa nui o nā kiwi me ke kumu ma ka ʻaoʻao. No nā kiwi uila mehana, pono e kau ʻia ke kumu valve ma ke ākea.
He paʻakikī loa nā kūlana hana o ka packing device ma ka haʻahaʻa haʻahaʻa, no ka mea, maʻalahi ka nalo ʻana o ka elasticity i ka paʻi ʻana, i ka manawa ma muli o ka leakage medium evaporation, ua maloʻo ke kumu, e alakaʻi ia i kahi hanana paʻa, ʻaʻole hiki ke wehe a pani maʻamau. I mea e hoʻomaikaʻi ai i nā kūlana hana o ka mea packing, hiki ke hoʻokomo i kahi baffle thermal e hōʻoia i ka insulation o ka packing. ʻO kēia ka mea nui i ka hoʻolālā e hoʻonui i ka lōʻihi o ke kumu. Hana ʻia ka baffle me nā mea metala ʻole me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa (ka lole, tape, a me nā mea ʻē aʻe) no laila e hoʻemi nui ʻia ka poho wela o ka pahu paʻi. ʻO kahi ʻē aʻe, ua ʻaʻahu ʻia ka mea hoʻopili a hoʻokuʻu ʻia ke ʻano me kahi mahana e mālama ai i ka hiki ke hana o ka mea hoʻopili i loko o ka lumi i kūkulu ʻia. ʻO kāna hana ka hana ʻana i ka valve mai ka haʻahaʻa haʻahaʻa a hiki i ka pae hana he ʻemi wela, ma kahi hana a ma waho o ka wahi hana, hiki i ke ea kaomi i kekahi mea hiki ke hana i ke kinoea liquefied ʻaʻole wai hou a hoʻi i ka. ka wela kinoea.
HE WEHE MAU KA PAU EA I NA MANAWA A PAU, E MAKEMAKE ANA ME kekahi wēlau o ka VALVE a i ʻole ma kekahi kihi, no laila inā piʻi ka wela o ka ea, ʻaʻohe piʻi kiʻekiʻe weliweli.
No ka mea, hana pinepine ʻia nā ʻāpana valve a hoʻāʻo ʻia i ka lumi wela, a hana ma lalo o nā kūlana haʻahaʻa haʻahaʻa, e hoʻopuka nā ʻāpana like ʻole i ka hoʻonui ʻana a me ka hoʻololi ʻana o ka mahana, e pili pono ana i ka hana maʻamau o ka valve, pono e hoʻolohe. i a hoomaopopo i ka hoohana ana.
Hoʻohana ʻia nā kiwi wela haʻahaʻa i nā ʻano mea like ʻole, nā mea maʻamau: e like me ke kila kalapona (WCB) e lilo i palupalu i ka emi ʻana o ka mahana. ʻO nā mea maʻamau i hoʻohana ʻia e koho ʻia: austenitic stainless steel, keleawe, a me nā ʻāpana keleawe-nickel, ʻo ia mau mea āpau ʻole a hiki ke hoʻohana pono ʻia. Hōʻike ka ʻike i ka austenitic stainless steel, keleawe a me Cu-Ni alloy nā mea maikaʻi loa no ka paʻakikī a me ka ikaika. No laila kekahi mau māhele koʻikoʻi o ka valve haʻahaʻa haʻahaʻa, e like me: globe valve, safety valve, regulating valve, check valve a pēlā aku, koho i kēia ʻano mea.
Hōʻike ka ʻike hana iā mākou ʻoiai no ka austenitic stainless steel, keleawe a me COPper-nickel alloy, inā ʻaʻole mālama pono ʻia nā huahana i hoʻopau ʻia me ka haʻahaʻa haʻahaʻa, ke hoʻohana ʻia ka valve i ka haʻahaʻa haʻahaʻa, e deformed nā ʻāpana o loko ma muli o ka pae waiwai. hoʻololi ʻia e ka wela haʻahaʻa, ka hopena i ka leakage valve.
I ke kaʻina hana o ka valve haʻahaʻa haʻahaʻa, ma muli o nā mea like ʻole o nā gaskets pili flange, hoʻohui i nā bolts a me nā ʻāpana hoʻohui, ʻaʻole e hui pū ʻia ka hoʻopaʻa ʻana ma waena o nā mea like ʻole, ka hopena o ka hoʻomaha a me ka leakage. No laila, ʻo ka valve haʻahaʻa haʻahaʻa, ʻoi aku ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa i hoʻohana ʻia ma lalo o -196 ℃, ʻoi aku ka maikaʻi o kāna ʻano pili e hoʻohana i ka pilina wili.
Haʻahaʻa wela wela packing gasket, ka nui nui o F4, no ka mea, o kona maikai pono-lubrication, friction coefficient he uuku, a he kū hoʻokahi kemika. No laila, hoʻohana ʻia ia e ke aupuni, akā he mau hemahema ka F4, ʻo ka nui ke kahe o ke anuanu, ʻo ka mea ʻē aʻe ka nui o ka hoʻonui ʻana o ka laina, ʻo ka emi ʻana o ke anuanu i ka haʻahaʻa haʻahaʻa e alakaʻi i ka leakage, ka hopena i ka nui o ka hau. ma ke kumu, i hiki ole ai ka wehe ana o ka kiwi. No laila, hoʻohana wale ʻia i nā kūlana wela haʻahaʻa maʻamau. Inā loaʻa nā kūlana wela, pono e koho i ka mea ulana graphite maʻalahi, a i ʻole ke kila kila a me ka graphite maʻalahi. ʻO kekahi ʻano haʻahaʻa haʻahaʻa wela e hana ana, ʻike pinepine ʻia ka ʻāpana hoʻoili o ka valve i pili. Loaʻa ka hanana occlusal i kēlā me kēia manawa. ʻO nā kumu nui: ke koho kūpono ʻole o nā mea i hoʻopaʻa ʻia, liʻiliʻi loa i hoʻopaʻa ʻia i ke anu anuanu, a me ka pololei o ka mīkini. Inā loaʻa nā pilikia like i ke kaʻina o ka hoʻohana ʻana, pono lākou e waiho i mua i ka mea hoʻolako i ka manawa e hoʻomaikaʻi ai i ka hoʻolālā hoʻolālā a hoʻololi i nā mea kūpono (bushing).
ʻO nā koi ʻē aʻe no nā kiwi wela haʻahaʻa e like me nā valve maʻamau.
ʻO ke koi a me ka hoʻohana ʻana i ka valve seal butterfly valve ma ka valve wela haʻahaʻa
Me ka wikiwiki o ka hoʻokele waiwai a me ka ʻenehana ʻenehana, ka loli mau ʻana o ka ʻenehana kiʻekiʻe a me ka makemake o ka poʻe no nā valve, ke kū nei ka ʻoihana valve i nā pilikia nui a me nā manawa kūpono. ʻOi aku ka nui o ka hoʻohana ʻana i ka valve butterfly i ka haʻahaʻa haʻahaʻa haʻahaʻa, me ka hoʻokō ʻana i ka hana o ka valve maʻamau i ka lumi wela, ʻoi aku ka nui o ka hilinaʻi o ka sila valve i ka haʻahaʻa haʻahaʻa, ka maʻalahi o ka hana a me kekahi mau koi kūikawā o ka kiwi wela haʻahaʻa.
Butterfly valve he compact structure, liʻiliʻi liʻiliʻi, māmā ke kaumaha (i hoʻohālikelike ʻia me ka puʻe like, hiki i ka nui o ka puka kīpē ke hoʻemi i ka 40% ~ 50%) wai kū kūʻē, wehe a pani koke a me kahi ʻano o nā pono, no laila e hoʻohana.
Akā i kekahi mau mea wela haʻahaʻa, e like me ke kinoea liquefaction lako, ea hoʻokaʻawale lako a me ka puʻe kowali adsorption lako i hoʻohana 'ia i loko o kemika 'oihana oi aku mamua o 80% a globe kiwi a puka puka, butterfly valve he uuku. ʻO ke kumu nui, ʻo ka valve seal butterfly valve ka maikaʻi ʻole o ka hoʻopaʻa inoa ʻana i ka haʻahaʻa haʻahaʻa, a ʻo kekahi mau kumu ʻē aʻe e like me ke kumu kūpono ʻole ke kumu o ka leakale kūloko kūloko a me ka leakage o waho, e hoʻopilikia koʻikoʻi i ka palekana a me ka hana maʻamau o kēia mau mea wela haʻahaʻa a hiki ʻole. e hoʻokō i nā koi o nā mea wela haʻahaʻa.
Wahi a ka hoʻomau mau ʻana o nā mea haʻahaʻa haʻahaʻa haʻahaʻa i ko mākou ʻāina, ke hoʻonui nei ka koi no ka valve haʻahaʻa haʻahaʻa i kēlā me kēia lā. No laila, ua hoʻomaikaʻi maikaʻi ʻia ka valve sealing valve, a ua hoʻomohala ʻia ka valve butterfly o ʻekolu-eccentric metala maʻemaʻe me ka hana sealing kiʻekiʻe. Hiki i kēia valve butterfly ke hoʻokō i kāna koi no ka mea he kiʻekiʻe ka wela a i ʻole ka wela haʻahaʻa.
ʻO ka hui pū me kāna mau hiʻohiʻona hoʻolālā, hoʻokomo wale ʻia ka hana haʻahaʻa haʻahaʻa.
ʻO ka mea mua, ʻo ka haʻahaʻa haʻahaʻa haʻahaʻa disc valve sealing performance koi:
ʻElua kumu nui no ka leakage valve haʻahaʻa haʻahaʻa, ʻo ka leakage kūloko; ʻO ka lua ka leakage.
1) Hoʻopuka ka valve i ka leakage o loko
ʻO ke kumu nui ʻo ia ka deformed o ka paipa hoʻopaʻa ʻia i ka haʻahaʻa haʻahaʻa.
Ke hāʻule ka mahana maʻamau i ka hoʻololi ʻana o ka pae waiwai ma muli o ka hoʻololi ʻana o ka leo, no laila ʻo ka hoʻololi maoli ʻana o ka wili ʻana o ka deformation warping o ka ʻili o ka sila e hopena i ka sila wela haʻahaʻa haʻahaʻa. Ua hana mākou i ka hoʻāʻo haʻahaʻa haʻahaʻa ma DN250 valve. ʻO ka mea waena he wai nitrogen (-196 ℃) a ʻo ka mea papa butterfly ʻo 1Cr18Ni9Ti (me ka ʻole o ka mālama wela haʻahaʻa). Ua ʻike ʻia ʻo ka warp-deformation o ka hoʻopaʻa ʻana ma kahi o 0.12mm, ʻo ia ke kumu nui o ka leakage kūloko.
Hoʻololi ʻia ka valve butterfly hou mai ke sila mokulele i ke sila conical. He alo hoʻopaʻa oval tapered ka noho, a he apo hoʻopaʻa elastic elastic i hoʻokomo ʻia i loko o ka pā peʻapeʻa e hana i ʻelua sila. Hiki i ke apo seal ke lana i ka radial ma ke awāwa disc. Ke pani ʻia ka valve, hoʻopili mua ke apo hoʻopaʻa elastic me ke koʻi pōkole o ka ʻili elliptic sealing, a me ka hoʻololi ʻana o ke kumu valve, e hoʻoneʻe mālie ʻia ke apo sealing i loko, e koi ana i ke apo elastic e hoʻopili me ke koʻi lōʻihi o ka ʻili conical oblique, e alakaʻi ana i ka pili piha ma waena o ke apo hoʻopaʻa elastic a me ka ʻili elliptic sealing. Loaʻa kona sila ʻana e ka deformation o ke apo elastic.
No laila, i ka wā e hoʻololi ʻia ai ke kino a i ʻole ka papa butterfly i ka haʻahaʻa haʻahaʻa, e hoʻopili ʻia a uku ʻia e ke apo elastic sealing, a ʻaʻole ia e hoʻopuka i ka leakage a paʻa i ke ʻano. Nalo koke kēia deformation elastic i ka wā e wehe ʻia ai ka valve, a ʻaʻohe kumu pili i ka wehe ʻana a me ka pani ʻana, no laila ua lōʻihi ke ola lawelawe.
2) leakage o ka valve.
ʻO ka mea mua i ka wā e hoʻopili ʻia ai ka valve a me ka pipeline e nā flanges, ke kumu o ka leakage ma muli o ka hoʻomaha ʻana o ka pā pili, ka bolt pili, a me nā ʻāpana pili e hoʻemi ʻia mai ka sync ma waena o nā mea i ka haʻahaʻa haʻahaʻa. No laila, ua hoʻololi mākou i ke ʻano pili o ke kino valve a me ka pipeline mai ka pili flange i ka hoʻolālā welding e pale i ka leakage haʻahaʻa haʻahaʻa.
ʻO ka lua ka leakage o ke kumu a me ka paʻi. Ma keʻano laulā, hoʻohana ka hapa nui o ka pahu kīwī i ka F4, no ka maikaʻi o kāna hana hoʻoheheʻe ponoʻī, liʻiliʻi friction coefficient (friction coefficient o ke kila f = 0.05 ~ 0.1), a he kū hoʻokahi kemika, no laila ua hoʻohana ʻia.
Eia nō naʻe, loaʻa iā F4 nā hemahema. ʻO ka mua, he nui ke kahe anuanu; ʻO ka lua, he nui ka coefficient o ka hoʻonui ʻana i ka laina, e hopena i ka leakage shrinkage ma kahi haʻahaʻa haʻahaʻa, e hopena i ka nui o ka icing ma ke kumu, e hana i ka hāmama hāmama. ʻO ka valve butterfly haʻahaʻa haʻahaʻa i hoʻomohala ʻia no kēia kumu e hāpai i ke ʻano o ka sila hoʻokaʻawale iā ia iho, ʻo ia hoʻi, hiki iā ia ke sila i ka mahana maʻamau a me ka mahana haʻahaʻa ma o ke āpau i waiho ʻia ma ka hoʻohana ʻana i ka coefficient hoʻonui nui o F4.