Dalilai da halaye na yawan fashewar kai na insulator na gilashi

1. Self fashewa inji na tempered gilashi

Gilashin insulator ɗin gilashin gilashi ne mai zafi, wanda ke da alaƙa da matsananciyar damuwa a saman da damuwa mai ƙarfi a ciki, kamar yadda aka nuna a cikin adadi.

Danniya stratification na zafin gilashin

Damuwar gilashin yana haifar da canjin zafin jiki a cikin sarrafa gilashi.Lokacin da gilashin da aka mai tsanani zuwa zafin jiki mai laushi (760 ~ 780 ℃) ya yi sanyi da sauri, ƙarfin wuta na saman Layer yana raguwa, amma zafin jiki na ciki har yanzu yana da girma kuma yana cikin yanayin fadadawa, wanda ya haifar da toshewar raguwa. na Layer Layer da damuwa mai matsawa a cikin Layer Layer;Sa'an nan kuma zafin jiki na ciki yana raguwa kuma ya fara raguwa, amma a wannan lokacin, Layer na saman ya taurare, wanda ya haifar da raguwa na ciki da damuwa.Wadannan nau'ikan damuwa guda biyu ana rarraba su daidai gwargwado a cikin gilashin har sai an sanyaya su gaba daya kuma yanayin zafin jiki ya ɓace, wanda shine damuwa na dindindin.

Da zarar an lalata ma'auni tsakanin matsananciyar matsa lamba da damuwa mai ɗorewa na gilashin insulator gilashin, fashewa zai faru da sauri a ƙarƙashin aikin damuwa, wanda zai haifar da rushewar gilashi, wato, fashewar kai.

2. Dalilai da halayen fashewar kai

Abubuwan da ke haifar da fashewar insulator gilashin za a iya kasu kashi biyu: ingancin samfur da yanayin aiki na waje.A hakikanin gaskiya, sau da yawa akwai dalilai guda biyu a lokaci guda.

a.Dalilan ingancin samfur

Babban dalili shi ne cewa akwai ɓangarorin ƙazanta a cikin insulator na gilashi, kuma mafi yawan su shine barbashi na nis.Halin canjin lokaci na NIS a cikin aiwatar da narkewar gilashi da annealing bai cika ba.Bayan an sanya insulator a cikin aiki, ana la'akari da cewa canjin lokaci da fadadawa yana faruwa a hankali, yana haifar da fashewa a cikin gilashin.Lokacin da diamita na ƙazantar ƙazanta ta ƙasa da ƙayyadaddun ƙima, ƙila ba za a cire shi ta sanyi da girgiza mai zafi ba, wanda ke haifar da fashe mai yawa na insulators a cikin aiki [bincike na fashewar kai tsaye na insulators gilashin gilashin 500kV Xie Hongping].Lokacin da ɓangarorin ƙazanta suna cikin madaidaicin matsi na gilashin, yuwuwar fashewar kai ya fi girma.Domin gilashin da kansa wani abu ne mai karyewa, wanda ke da juriya ga matsi amma ba tauye ba, yawancin karyewar gilashin yana faruwa ne sakamakon damuwa mai ƙarfi.

sifa:

Fashewar kai da ɓangarorin ƙazanta na ciki ke haifarwa ya fi shekaru uku kafin a fara aiki, kuma sannu a hankali za su ragu bayan haka, wanda wata muhimmiyar doka ce don yin hukunci a kan dalilin fashewar kai.

B) yuwuwar fashewar kai a wurare daban-daban na igiyar insulator iri ɗaya ce;

b.Dalilan waje

Galibi gurɓata yanayi da canjin yanayin zafi.Karkashin aikin na lokaci guda na gurɓataccen gurɓataccen gurɓataccen ruwa, danshi da filin lantarki, ɗigon ruwa a saman insulator ya yi girma da yawa, yana haifar da wani ɓangaren busasshen bel.Lokacin da fashewar iska ta faru a wurin busassun bel, baka da aka samar zai lalata siket ɗin gilashin, kuma lokacin da zurfin lalata ya yi zurfi, zai haifar da fashewar kai.Idan walƙiya ta bugi insulator yayin aikin da ke sama, yuwuwar fashewar yuwuwar insulator ɗin gilashin da ya lalatar da baka zai ƙaru sosai.Wuce kima shine maɓalli, wanda ƙila ya kasance saboda yawan gishiri mai yawa ko ɓawon ƙarfe da yawa a cikin lalata.

sifa:

A) yana yiwuwa fashewar kai ba a bayyane yake ba a cikin 'yan shekarun farko na aiki, amma yana faruwa sosai a wani lokaci bayan shekaru da yawa na aiki (manyan canje-canje a wuraren gurbataccen yanayi yana haifar da gurɓataccen gurɓataccen abu);

B) yuwuwar fashewar kai tsaye na ƙarshen babban ƙarfin wutar lantarki da ƙarancin ƙarancin wutar lantarki na kirtani mai insulator ya fi girma fiye da na tsakiya (filin lantarki a ƙarshen babban ƙarfin wutar lantarki da ƙarancin wutar lantarki yana da ƙarfi, kuma raƙuman ruwa na gida yana faruwa. na farko a ƙafar karfe na insulator lokacin da gurbatar yanayi yayi nauyi sosai;

C) Ƙafar ƙarfe na insulator wanda ba mai fashewa ba a cikin hasumiya ɗaya ya lalace (arc na gida wanda ke haifar da gurɓataccen gurɓataccen abu yana haifar da lalacewa ga gilashin kusa da ƙafar karfe), kuma akwai fashe masu kyau a cikin laima;

Lalacewar gilashi kusa da ƙafar karfe

3. Residual guduma bincike

Bayan fashewar kai tsaye na insulator na gilashin, gilashin laima ya karye kuma ya tarwatse don samar da ragowar guduma.Siffar gilashi a kan ragowar guduma na iya ba da taimako don nazarin dalilin fashewar kai.Siffa da nau'in ragowar gilashin guduma:

a.Radial

Don fashewar kai wanda lahani ɗaya ya haifar, ana iya samun wurin farawa ta hanyar juyar da binciken tsagewar.Idan gilashin da ya karye a kan ragowar guduma yana cikin sifar rediyo, wurin fara fashewar sa, wato, wurin farawa na fashewar kai, yana kan guntun gilashin.A wannan yanayin, fashewar kai yana haifar da ingancin gilashin kanta, kamar batching, tsarin rushewa, da dai sauransu.

Radial guduma

b.Kifi mai kaifi

Idan fashe gilashin slag a kan saura guduma ne a cikin siffar kifi Sikeli, da kuma farawa matsayi na kai fashewa ne kusa da kasan gilashin part kusa da baƙin ƙarfe hula, akwai biyu yiwu dalilai na kai fashewa a cikin wannan harka, cewa. shine, gilashin ya karye saboda fashewar kansa na lahani na samfurin ko ƙarfin waje, wanda zai iya zama damuwa na inji ko damuwa na lantarki, kamar ci gaba da yajin wutar lantarki, karyewar sassan gilashin da ke haifar da mitar wutar lantarki mai girma na yanzu da rashin daidaituwa. halin yanzu, etc.

Rago ma'aunin kifin guduma

c.Gauraye

Idan fashe-fashe na gilashin a kan ragowar guduma ya kasance a cikin sikelin kifi da sifar tsinkaya, farkon fashewar kai yana kan siket ɗin gilashin.A wannan yanayin, fashewar kai na iya haifar da abubuwan ciki da na waje.

Sauran guduma gauraye nau'in

4. Magani

a.Ikon samun dama: ana sarrafa ingancin isar da insulators ta gilashi ta hanyar duban samfur na lalacewar injina da tasirin tasirin igiyar ruwa.

b.Ana amfani da insulators masu hadewa a wuraren da suka gurbata sosai.Idan an ƙaddara cewa fashewar kai tsaye yana haifar da tarin gurɓataccen gurɓataccen abu, ana iya amfani da insulators masu haɗaka don maye gurbin insulators na gilashi.

c.Ƙarfafa binciken sintirin, da kuma gudanar da sintiri na musamman a kan layin watsa labarai cikin lokaci bayan mummunan yanayi kamar yaɗuwar walƙiya.

d.Kula da sufuri.Lokacin gina kayan more rayuwa da gyare-gyaren gaggawa, za a kiyaye insulator ɗin gilashin ta hanyar abubuwan kariya don guje wa lalacewa.

A halin yanzu, kula da ingancin gilashin gilashi a cikin manyan masana'antun gida yana da kyau, kuma ba lallai ba ne a yi amfani da gilashin gilashin da aka ambata a baya bayan tsayawa na rabin shekara.