Ntinye na nha ngwa nke vortex flowmeter

A na-eji ọkọlọtọ orifice flowmeter mee ihe n'ọtụtụ ebe na nha nke mmiri mmiri jupụtara na 1980s, mana site na mmepe nke ngwá ọrụ na-asọpụta, ọ bụ ezie na orifice flowmeter nwere ogologo akụkọ ihe mere eme na ọtụtụ ngwa ngwa; Ndị mmadụ amụwo ya nke ọma na data nyocha zuru ezu, ma a ka nwere ụfọdụ adịghị ike na iji ọkọlọtọ orifice flowmeter iji tụọ ụda uzuoku jupụtara: nke mbụ, nkwụsị nrụgide dị ukwuu; Nke abụọ, ọkpọkọ mkpali, otu atọ nke valvụ na njikọ njikọ dị mfe ịwụpụ; Nke atọ, oke nha dị ntakịrị, n'ozuzu 3: 1, nke dị mfe ime ka ọnụ ahịa nha dị ala maka nnukwu mgbanwe mgbanwe. Igwe ikuku vortex nwere usoro dị mfe, a na-etinyekwa onye na-ebugharị vortex ozugbo na pipeline, nke na-emeri ihe ngosi nke ntanye pipeline. Na mgbakwunye, vortex flowmeter nwere obere mfu nrụgide na oke dị iche iche, yana nha nha nha nke uzuoku jupụtara nwere ike iru 30: 1. Ya mere, na ntozu oke nke teknụzụ nha nha vortex, ojiji nke vortex flowmeter na-ewu ewu karị.

1. Ụkpụrụ nha nke vortex flowmeter

Vortex flowmeter na-eji ụkpụrụ oscillation nke mmiri iji tụọ ọsọ ahụ. Mgbe mmiri ahụ na-agafe transmitter vortex vortex na pipeline, ahịrị abụọ nke vortices nke nhata nha nha na-agbapụta na-agbanwe agbanwe na elu na ala n'azụ vortex generator nke triangular kọlụm. Oge ntọhapụ nke vortex na-ejikọta na nkezi ọsọ nke mmiri na-asọ site na generator vortex na njirimara obosara nke vortex generator, nke nwere ike ịkọwa dị ka ndị a:

Ebe: F bụ ugboro ntọhapụ nke vortex, Hz; V bụ nkezi ọsọ nke mmiri na-asọ site na generator vortex, m / s; D bụ njirimara obosara nke vortex generator, m; ST bụ nọmba Strouhal, enweghị akụkụ, yana ọnụ ahịa ya bụ 0.14-0.27. ST bụ ọrụ nke nọmba Reynolds, st=f (1/re).

Mgbe nọmba Reynolds Re dị na nso nke 102-105, uru st bụ ihe dịka 0.2. Ya mere, na nha, ọnụ ọgụgụ Reynolds nke mmiri kwesịrị ịbụ 102-105 na ugboro vortex f=0.2v/d.

Ya mere, nkezi ngwa ngwa V nke mmiri na-asọ site na generator vortex nwere ike ịgbakọ site na ịlele ugboro ole vortex, mgbe ahụ, enwere ike nweta ọsọ Q site na usoro q = va, ebe a bụ akụkụ nke akụkụ nke mmiri na-asọpụta. site na generator vortex.

Mgbe a na-emepụta vortex n'akụkụ abụọ nke generator, a na-eji piezoelectric sensọ tụọ mgbanwe mgbanwe mgbanwe na-agbanwe agbanwe na ntụziaka nke mmiri na-asọpụta, gbanwee mgbanwe nke elu ka ọ bụrụ akara ọkụ eletrik, gbasaa ma na-akpụzi mgbama ugboro ugboro, wee wepụta ya. na ngwá ọrụ nke abụọ maka nchịkọta na ngosi.

2. Ngwa nke vortex flowmeter

2.1 nhọrọ nke vortex flowmeter

2.1.1 nhọrọ nke nnyefe vortex eruba

Na nha uzuoku juru eju, ụlọ ọrụ anyị na-anabata ụdị VA ụdị piezoelectric vortex transmitter nke Hefei Instrument General Factory mepụtara. N'ihi na obosara nke vortex flowmeter, na ngwa ngwa, a na-ewerekarị na mmiri nke uzuoku jupụtara adịghị ala karịa njedebe ala nke vortex flowmeter, ya bụ, ọnụ ọgụgụ mmiri na-asọ oyi ekwesịghị ịdị ala karịa 5m / s. A na-ahọrọ ndị na-ebugharị Vortex na dayameta dị iche iche dị ka oriri uzuoku si dị, karịa usoro ọkpọkọ ọkpọkọ dị ugbu a.

2.1.2 nhọrọ nke nnyefe nrụgide maka nkwụghachi ụgwọ

N'ihi pipeline uzuoku juru eju na nnukwu mgbanwe nrụgide, a ghaghị ịnakwere nkwụghachi ụgwọ nrụgide. N'ịtụle mmekọrịta kwekọrọ n'etiti nrụgide, okpomọkụ na njupụta, naanị nkwụghachi ụgwọ nwere ike ịnakwere na nha. Ebe ọ bụ na nrụgide uzuoku juru eju nke pipeline nke ụlọ ọrụ anyị dị na 0.3-0.7mpa, enwere ike ịhọrọ ụdị nrụgide dị ka 1MPa.