Grooed bututu nau'in bututu ne mai tsagi bayan mirgina.Na kowa: madauwari tsagi bututu, m tsagi bututu, da dai sauransu ana kiransa bututun tsagi saboda ana iya ganin tsagi a cikin sashin bututun.Irin wannan bututu na iya sa ruwan ya gudana ta bangon waɗannan sifofi masu tayar da hankali, ya samar da wuraren rabuwar kwarara, kuma ya haifar da vortices mai ƙarfi da girma dabam dabam.Wadannan vortices ne ke canza tsarin tafiyar da ruwa da kuma kara yawan tashin hankali a kusa da bango, don inganta haɓakar fim ɗin zafi mai zafi na ruwa da bango.

a.Rolling tsagi tube mirgina tsagi tube shi ne mirgine a kwance tsagi ko karkace tsagi tare da wani takamaiman farar da zurfin daga waje na madauwari tube bisa ga zane da bukatun, da kuma samar da protruding a kwance hakarkarin ko karkace haƙarƙari a kan ciki bango na tube. , kamar yadda aka nuna a cikin Hoto 1. Tsagi a kan bangon waje da kuma haɓakawa a kan bangon ciki na bututu na iya inganta yanayin zafi na ruwa a bangarorin biyu na bututu a lokaci guda.Yana da musamman dace don ƙarfafa zafi canja wuri na guda-lokaci ruwa ruwa a cikin bututu da kuma inganta tururi condensation da ruwa film tafasar zafi canja wuri na ruwa a waje da bututu a cikin zafi Exchanger.

b.Karkataccen bututu yana da fasfo guda ɗaya da karkace mai yawa da sauran nau'ikan.Bayan an kafa, akwai wani tsagi mai wani kusurwa mai karkace a wajen bututun karkace, kuma akwai madaidaicin haƙarƙari a cikin bututun.Karkashin tsagi bai kamata ya yi zurfi sosai ba.Zurfin tsagi shine, mafi girman juriya na kwarara, mafi girman kusurwar karkace, kuma mafi girman madaidaicin fim ɗin canja wurin zafi na bututu mai tsagi.Idan ruwan zai iya juyawa tare da tsagi, adadin zaren yana da ɗan tasiri akan canja wurin zafi.

c.An kafa bututun giciye ta hanyar jujjuyawar juzu'i mai canzawa.A waje da bututu ne m tsagi intersecting da bututu axis a 90 °, da kuma ciki na bututu ne m convex hakarkarinsa.Bayan da ruwa ya ratsa ta cikin haƙarƙari mai ma'ana a cikin bututu, ba ya haifar da karkace, amma yana samar da ƙungiyoyin axial vortex tare da dukan sashe, don ƙarfafa canjin zafi.The giciye threaded tube kuma yana da babban ƙarfafa sakamako a kan fim tafasasshen zafi canja wuri na ruwa a cikin bututu, wanda zai iya ƙara tafasasshen zafi canja wurin coefficient ta 3-8 sau.