Mu sau da yawa muna cewa bututu mai zafi yana nufin bututun ƙarfe mai ƙarancin yawa amma ƙaƙƙarfan raguwa, ƙungiyar ma'auni ta kasar Sin ta nuna cewa bututun ƙarfe mai zafi ya kamata ya zama bututun ƙarfe mai girman diamita ya faɗaɗa kuma ya lalace bayan gabaɗaya. dumama bututun ƙarfe mara nauyi .. Fasahar haɓakar thermal ita ce faɗaɗa diamita na bututu ta hanyar nakasar radial, wato, ba daidai ba, ana iya samar da samfuran musamman na bututu marasa ƙarfi ta amfani da bututu mai ƙaya, kuma farashin yana da ƙasa kuma samarwa. inganci yana da yawa.Hanyar sarrafawa ce ta gama gari don bututu maras sumul.Saboda babban ma'auni na bunƙasa masana'antar wutar lantarki da kuma ci gaban manyan masana'antar petrochemical, buƙatun manyan bututun da ba su da kyau kuma yana ƙaruwa, kuma yana da wahala ga na'urori masu jujjuya bututu su samar da bututun da ya fi girma fiye da diamita. 508mm, Rabo na waje diamita zuwa bango kauri(D/S)>25, thermal fadada fasahar, musamman da in mun gwada tsada-tasiri matsakaici mita thermal fadada fasahar ya sannu a hankali ci gaba da haka shi.

 

Fadada bututu mai hawa biyu da ake amfani da bututun karfe mai zafi ya haɗu da fasahar faɗaɗa diamita na mazugi, fasahar dumama matsakaicin mitar dijital, da fasahar ruwa a cikin injin guda ɗaya.Tare da m tsari, ƙananan amfani da makamashi, ƙananan zuba jari, kuma mai kyau The samfurin ingancin, fadi da kewayon albarkatun kasa da samfurin bayani dalla-dalla, sassauƙa da ƙananan shigarwa samar da tsari daidaitawa sun maye gurbin gargajiya ja-type diamita fadada fasahar na karfe bututu masana'antu. .

 

Ya kamata a lura da cewa kayan aikin injiniya na bututun ƙarfe masu zafi sun kasance mafi muni fiye da bututun ƙarfe masu zafi.

 

Babban tsarin fadada bututun na thermal shine gyara bututun akan dunƙule gubar, sanya magudanar sama mai siffar mazugi mai diamita fiye da diamita na bututu zuwa ɗayan ƙarshen bututun, sannan a haɗa da gyara ɗayan. dunƙule a cikin bututu.Haɗin da ke tsakanin bututu da maƙarƙashiya na sama yana a ƙasan matsakaicin mitar dumama, don magance dumama da sauri da fashe, kuna buƙatar shigar da ruwa a cikin bututu da farko, fara dumama na'urar, kuma bayan isa ga zafin da aka ƙayyade. , dunƙulewar da ke haɗa bututun yana tura bututun, don haka bututun ya motsa zuwa saman magudanar kuma ya faɗaɗa.Ƙarƙashin maƙarƙashiya na sama yana haɓaka diamita na bututu.Bayan duk bututun ya wuce, bututun ba zai kasance madaidaiciya ba saboda tsarin fadada thermal, don haka yana buƙatar daidaita shi.

Abin da ke sama shine ainihin abun ciki na fasahar fadada thermal.

 Mai zuwa shine tsarin da ya dace na bututu mai faɗaɗa thermal

 

Fadada nauyi:

carbon karfe: (diamita-kauri)× kauri× 0.02466 = nauyit na mita daya (kg)

gami: (diamita-kauri)× kauri× 0.02483 = nauyina mita daya (kg)

yawan mita bayan zafi fadada:

asali tube Diamita÷ zafi fadada diamita× 1.04× tsayi*

 

asali tube mita:

tsawo tsawo× (diamita÷ diamita tube na asali÷ 1.04)

 

gudun:

100000÷ (asalin diamita-kauri× kauri)

 

kauri:

fadada kauri (lokaci 1) ) = Kauri na asali× 0.92

Fadada kauri (sau 2) = Asalin kauri na bututu * 0.84

 

Diamita:

Fadada diamita = Girman mold + kauri mai faɗaɗa× 2

Girman mold: faɗaɗa diamita-2 * Fadada bango Kauri

 

Haƙurin diamita:

Diamita＜426mm, haƙuri±2.5

Diamita 426-630mm, haƙuri±3

Diamita：630mm, haƙuri±5

 

Halin iyawa:

Diamita＜426mm, haƙuri±2

Diamita：426mm, haƙuri±3

 

Kauri:

kauri≤20mm, haƙuri﹢2 ,-1.5

kauri≤40mm ku﹢3 ,-2

Bututu don yin shigar bututu

﹢5 ,-0

 

Ciki da waje na karce:

 

Tsawon zurfafawa: 0.2mm, tsawon: 2cm, ana kiransa karce.Ba a yarda ba

Madaidaici: ≤6 mita, lankwasawa ne 5mm≤Tsawon mita 12, lankwasawa shine 8mm

 

Misali:

Original tube 610*19 zafi fadada 660*16

Tsawon bututu na asali: 12.84m

Fadada kauri: 19 * 0.92 = 17.48 (lokaci 1)

19*0.84=15.96(2 sau)

Fadada tsawon bututu: 610÷660*1.04*12.84=12.341962

Fadada diamita: 625+17.48*2+1=660.96(lokaci 1)

625+15.96*2+1=657.92(sau biyu)

 

Girman Module: 660-2*16=628