Hoʻomaka a me ana noi ana o ka vortex flowmeter

Ua hoʻohana nui ʻia ka flowmeter orifice maʻamau i ke ana ʻana o ka kahe mahu saturated i nā makahiki 1980, akā mai ka hoʻomohala ʻana i nā mea kani kahe, ʻoiai ʻo ka orifice flowmeter he moʻolelo lōʻihi a me kahi ākea o nā noi; Ua aʻo maikaʻi ka poʻe iā ia a ua piha ka ʻikepili hoʻokolohua, akā aia nō kekahi mau hemahema i ka hoʻohana ʻana i ka mīkini kahe puka maʻamau e ana i ka kahe o ka mahu: ʻo ka mua, nui ka poho o ka puʻe; ʻO ka lua, ʻo ka paipu impulse, ʻekolu pūʻulu o nā kiwi a me nā mea hoʻohui e maʻalahi ke kahe; ʻO ke kolu, liʻiliʻi ka laulā ana, maʻamau 3: 1, he mea maʻalahi ke kumu i nā waiwai ana haʻahaʻa no nā loli kahe nui. He ʻano maʻalahi ka vortex flowmeter, a ua hoʻokomo pololei ʻia ka vortex transmitter ma ka pipeline, e lanakila ana i ke ʻano o ka leakage pipeline. Eia kekahi, ʻo ka vortex flowmeter he pohō liʻiliʻi a me ka laulā ākea, a hiki i ke ana ʻana o ka lākiō o ka mahu saturated hiki ke hiki i 30:1. No laila, me ka oʻo o ka vortex flowmeter ana ʻenehana, ʻoi aku ka kaulana o ka hoʻohana ʻana i ka flowmeter vortex.

1. Ana kumu o ka vortex flowmeter

Hoʻohana ʻo Vortex flowmeter i ka loina oscillation wai e ana i ke kahe. Ke hele ka wai ma ka vortex flow transmitter i loko o ka pipeline, ʻelua lālani vortices e like me ka kahe kahe e hana ʻia i luna a i lalo ma hope o ka mea hana vortex o ke kolamu triangular. ʻO ke alapine o ka hoʻokuʻu ʻana o ka vortex pili i ka awelika wikiwiki o ka wai e kahe ana ma o ka vortex generator a me ke ʻano ākea o ka vortex generator, hiki ke hōʻike ʻia penei:

ʻAuhea: F ka hoʻokuʻu pinepine o ka vortex, Hz; ʻO V ka wikiwiki awelika o ka wai e kahe ana i loko o ka mea hana vortex, m/s; ʻO D ka laulā maʻamau o ka mea hana vortex, m; ʻO ST ka helu Strouhal, dimensionless, a ʻo kona laulā waiwai he 0.14-0.27. ʻO ST kahi hana o ka helu Reynolds, st=f (1/re).

Aia ka helu Reynolds Re i ka laulima o 102-105, he 0.2 ka helu st. No laila, ma ke ana, he 102-105 ka helu Reynolds o ka wai a me ke alapine vortex f=0.2v/d.

No laila, hiki ke helu ʻia ka awelika velocity V o ka wai e kahe ana ma ka vortex generator ma ke ana ʻana i ke alapine vortex, a laila hiki ke loaʻa ke kahe Q mai ka formula q=va, kahi a ʻo ia ka ʻāpana kea o ka wai e kahe ana. ma o ka vortex generator.

Ke hana ʻia ka vortex ma nā ʻaoʻao ʻelua o ka mīkini hana, hoʻohana ʻia ka sensor piezoelectric e ana i ka hoʻololi ʻana o ka hāpai ʻana e kū pono ana i ke ala kahe o ka wai, e hoʻololi i ka hoʻololi ʻana i kahi hōʻailona uila, hoʻonui a hoʻohua i ka hōʻailona alapine, a hoʻopuka iā ia. i ka mea hana lua no ka hōʻiliʻili a hōʻike.

2. Hoʻohana i ka vortex flowmeter

2.1 koho o ka vortex flowmeter

2.1.1 koho o ka vortex kahe transmitter

I ke ana ʻana o ka mahu, ua ʻae kā mākou hui i ka VA type piezoelectric vortex flow transmitter i hana ʻia e Hefei Instrument General Factory. Ma muli o ka laulā o ka vortex flowmeter, ma ka hoʻohana pono ʻana, ua manaʻo ʻia ʻaʻole i haʻahaʻa ka kahe o ka mahu saturated ma mua o ka palena haʻahaʻa o ka flowmeter vortex, ʻo ia hoʻi, ʻaʻole pono e emi ka kahe o ka wai ma mua o 5m / s. Ua koho ʻia nā transmitters kahe o Vortex me nā anawaena like ʻole e like me ka hoʻohana ʻana i ka mahu, ma mua o nā anawaena paipu kaʻina e kū nei.

2.1.2 ke koho ʻana i ka mea hoʻouna kaomi no ka uku kaomi

Ma muli o ka lōʻihi o ka saturated steam pipeline a me ka nui o ka piʻi ʻana o ke kaomi, pono e ʻae ʻia ka uku hoʻopaʻi. E noʻonoʻo ana i ka pilina pili ma waena o ke kaomi, ka mahana a me ka nui, hiki ke hoʻopaʻa ʻia i ka uku kaomi wale nō ma ke ana. No ka mea ʻo ke kaomi ʻana o ka mokuahi saturated o ka pipeline o kā mākou hui aia ma ka laulā o 0.3-0.7mpa, hiki ke koho ʻia ka laulā o ka mea hoʻouna kaomi e like me 1MPa.