Me yasa bambancin farashin ke tsakanin nau’in mitar matsakaici iri ɗaya induction narkewa tanderu?

Medium frequency induction melting has a high heating rate, high efficiency, low burning loss, low heat loss, relatively low workshop temperature, reduced smoke generation, energy saving, improved productivity, improved labor conditions, reduced labor intensity, and clean room environment. Especially for cast iron, the induction melting furnace is beneficial to obtain low-sulfur iron liquid which is unmatched by the cupola. When selecting the medium frequency melting furnace, the foundry company should select the following according to the transformer capacity, production requirements, investment quota, etc., when purchasing equipment.

1.   Medium frequency induction melting condition

1.1 Matsakaicin mitar induction narke mai iya canzawa

A halin yanzu, don SCR cikakken gada daidaitaccen inverter IDAN samar da wutar lantarki, alaƙar lamba tsakanin ƙarfin wutar lantarki da wutar lantarki shine: ƙimar ƙarfin wutar lantarki = ƙimar wutar lantarki x 1.2

Domin IGBT rabin gada jerin inverter IF wutar lantarki (wanda aka fi sani da ɗaya don biyu, ɗaya don narkar da rufi ɗaya, biyu don aiki na lokaci ɗaya), alaƙar lamba tsakanin ƙarfin wutar lantarki da wutar lantarki shine: ƙimar ƙarfin wutan lantarki = ƙimar wutar lantarki. wadata x 1.1

Transformer shine mai gyarawa. Don rage tsangwama na masu jituwa, yana da nisa ga jirgin sama na musamman, wato, matsakaicin matsakaicin mitar wutar lantarki yana sanye da na’ura mai gyarawa.

1.2 IF induction fuse layin wutar lantarki

Don matsakaicin mitar wutar lantarki da ke ƙasa da 1000KW, ana amfani da wutar lantarki mai ƙarfi guda uku 380V, 50HZ ikon masana’antu, kuma ana daidaita samar da wutar lantarki mai matsakaicin bugun jini guda ɗaya. Don samar da wutar lantarki na matsakaici-mita sama da 6KWY, an mai da hankali kan amfani da wutar lantarki mai shigowa 1000V (wasu masana’antun suna amfani da 660V ko 575V). Saboda 750VZ ko 575V matakin ƙarfin lantarki ba daidai ba ne, kayan haɗi ba su da kyau a saya, ana bada shawarar kada a yi amfani da su). Sanya 750-pulse mai daidaitawa biyu IDAN samar da wutar lantarki saboda dalilai guda biyu: na ɗaya shine ƙara ƙimar ƙarfin aiki ta ƙara ƙarfin layin mai shigowa; na biyu shine babba Abubuwan jituwa da aka samar ta hanyar wutar lantarki zasu tsoma baki tare da grid. Gyara sau biyu na iya samun madaidaiciyar halin yanzu na DC. Matsakaicin nauyin nauyin nau’i ne na rectangular, kuma nauyin nauyin nauyin yana kusa da sine, wanda ya rage tasirin tsangwama na grid akan wasu kayan aiki.

Some users blindly pursue high voltage (some 1000KW use 900V line voltage), and achieve energy saving since low current. I don’t know if this is at the expense of the life of the electric furnace. It is not worth the loss, high voltage is easy to shorten the life of electrical components. , copper platoon, cable fatigue, so that the life of the electric furnace is greatly reduced. In addition, high voltage for the electric furnace manufacturers, the raw materials are reduced in terms of materials, saving costs. Electric furnace manufacturers are certainly willing to do so (high-priced low-cost.) The ultimate loss is still the use of electric furnace manufacturers.

2. Capacity bukatun

Gabaɗaya, ana iya ƙaddara ƙarfin matsakaicin mitar induction narkewa ta wurin nauyin guda ɗaya da nauyin narkakken ƙarfe da ake buƙata don kowace ranar aiki. Sannan tantance iko da mitar wutar lantarkin IF. Induction kayan aikin dumama samfuri ne mara daidaituwa. A halin yanzu, babu wani ma’auni a cikin ƙasa, kuma ana nuna tsarin gabaɗayan masana’antar a cikin Table 1.

Tebur 1 Matsakaicin mitar shigar da narkakken tanderun zaɓi sigogi

Ana iya gani daga Tebu 1 cewa ƙarfin wutar lantarki na matsakaicin matsakaicin mitar shigar da wutar lantarki ya kusan 500 KW/ton, wanda yayi ƙasa da ƙimar mafi kyawun ka’idar 600-800 KW, galibi la’akari da rayuwar rufi da sarrafa samarwa. A karkashin babban iko mai yawa, electromagnetic stirring zai samar da karfi scouring na rufi, da kuma bukatun ga rufi kayan, tanderu gini hanyoyin, narkewa matakai, kayan, da kuma karin kayan ne high. Dangane da tsarin da ke sama, lokacin narkewa a cikin tanderun yana da mintuna 75 (ciki har da ciyarwa, ceton ƙazanta, quenching da lokacin zafi). Idan ya zama dole don rage lokacin narkewa a kowace tanderun, za a iya ƙara yawan ƙarfin wutar lantarki da 100 KW / ton yayin da ƙarfin wutar lantarki ya kasance koyaushe.

3. Zabin tsari

Dangane da halaye na masana’antu, isar da wutar lantarki na tsarin gami na aluminum tare da mai ragewa kamar yadda ake karkatar da hanyar da aka fi sani da tanderun harsashi na aluminium. Induction narkewa tanderu na karfe tsarin tare da na’ura mai aiki da karfin ruwa Silinda kamar yadda karkatar tanderu aka fi kira karfe harsashi makera. Ana nuna bambanci tsakanin su biyun a cikin Tebur 2 da Hoto 1.

Tebur 2 Tanderun harsashi na ƙarfe da tanderun harsashi na aluminium sun bambanta (ɗaukar tanderun simintin ƙarfe na tan 1 a matsayin misali)

Compared with the aluminum shell furnace, the advantages of the steel shell furnace are five points:

1) Rugged da kuma m, musamman ga manyan iya aiki tanderu, wanda bukatar wani karfi m tsari. Daga wurin aminci na murhu mai karkatarwa, gwada amfani da tanderun harsashi na ƙarfe.

2) Karkiya da aka yi da garkuwar takardan karfe na silicon kuma tana fitar da layukan maganadisu da aka samar ta hanyar coil induction, yana rage kwararar maganadisu, yana inganta ingancin zafi, yana haɓaka samarwa, yana adana kuzari da kashi 5% -8%.

3) Kasancewar murfin tanderun yana rage asarar zafi kuma yana ƙara amincin kayan aiki.

4) Rayuwar sabis na tsawon lokaci, aluminum ya fi oxidized a babban zafin jiki, yana haifar da gajiya mai ƙarfi na ƙarfe. A cikin rukunin masana’antar, ana ganin sau da yawa cewa harsashin harsashi na aluminium da ake amfani da shi na tsawon shekara guda ko makamancin haka ya karye, kuma tanderun harsashi na ƙarfe yana da ƙarancin ɗigogi a halin yanzu, kuma rayuwar sabis na kayan aikin ya zarce na harsashi na aluminum. tanderu.

5) Ayyukan tsaro Tanderun harsashi na karfe yana da kyau fiye da tanderun harsashi na aluminum. Lokacin da aka narkar da tanderun harsashi na aluminium, harsashin aluminium yana da sauƙin lalacewa saboda yawan zafin jiki da matsi mai nauyi, kuma amincin ba shi da kyau. Tanderun harsashi na ƙarfe yana amfani da tanderu mai karkatar da ruwa kuma yana da aminci kuma abin dogaro.

Me yasa farashin samfurin iri ɗaya ya bambanta? Ta yaya za ku zaɓi “tanderun narkewa” matsakaici?

Farashin irin wannan nau’in tanderun shigar da mitar matsakaici ya bambanta sosai. Ɗauki tan 1 na tanderun da aka fi amfani da shi azaman misali. Farashin kasuwa wani lokacin ya bambanta sau da yawa, wanda ke da alaƙa da tsarin tanderun, zaɓin ɓangaren, abun ciki na fasaha, sabis na tallace-tallace da inganci. Abu mai yawa ya dace.

Abubuwa daban-daban

Harsashi na Furnace da Yoke: A cikin zaɓin harsashi na tanderun harsashi na aluminium, daidaitaccen tankin 1 ton aluminum harsashi yana da nauyin harsashi na 400Kg da kauri na 40mm. Wasu masana’antun galibi suna da nauyi da ƙarancin kauri. Abu mafi mahimmanci na tanderun harsashi na karfe shine zaɓin karkiya. Zaɓin nau’in nau’in nau’in nau’in nau’in nau’in nau’in nau’in nau’in nau’in nau’in nau’i na nau’i na nau’i daban-daban. Bambancin farashin yana da girma sosai. Gabaɗaya, ya kamata a zaɓi sabon takaddar karfen silicon mai ƙarfi mai ƙarfi mai ƙarfi tare da Z11. Silicon karfe Kauri daga cikin takardar ne 0.3mm, da kuma contoured tsarin da aka soma. Fuskar baka na ciki da baka na madauwari na waje na induction coil iri ɗaya ne, ta yadda za a iya haɗa karkiya ta kusa da gefen waje na induction coil, kuma matsakaicin na’urar takura tana haskakawa a waje, kuma karkiya ta biyu ce Bakin Bakin. Farantin karfe da bakin karfe ana matse su, a yi musu walda da gyarawa, sannan a sanyaya su da ruwa.

(Wasu masana’antun suna amfani da sharar gida, babu fuskantarwa, ko ma zanen ƙarfe na silicon da aka cire daga na’urorin da aka yi amfani da su don yin karkiya,)

Bututun jan karfe da jeri iri ɗaya: Babban tanderun narkewa shine tasirin bututun jan ƙarfe mai sanyi da kuma bututun jan ƙarfe na coil induction. Ya kamata a yi amfani da bututun jan ƙarfe mai sanyin T2 tare da babban ɓangaren giciye. Ana fesa jiyya ta saman bututun jan ƙarfe ta hanyar lantarki don cimma rufin Class H. Don kare ƙarfin rufinta, tef ɗin mica da kintinkirin gilashin da ba shi da alkali ana naɗe su a naɗe a saman sau ɗaya, sannan a shafa enamel mai hana danshi. Akwai tazara tsakanin jujjuyawar nada. Lokacin da aka lulluɓe turmi a cikin kwandon, yumbu mai yuwuwa ya kamata a shigar da shi cikin rata don ƙarfafa mannewar manne akan nada akan nada. Bayan an gina siminti mai mahimmanci, an ɗora saman ciki don sauƙaƙe cire suturar. Ana kiyaye coil ɗin, kuma ana ƙara ƴan zoben kwantar da ruwa na bakin karfe zuwa saman sama da ƙananan ƙarshen nada don ƙara ƙaƙƙarfan gabaɗaya tare da sauƙaƙe zubar da zafi.

(Wasu masana’antun suna amfani da bututun jan ƙarfe ko T3, waɗanda ba su da ƙarancin wutar lantarki kuma suna da sauƙin karyewa da zubewa.)

SCR: Thyristor da masana’antun daban-daban ke amfani da shi gabaɗaya yana da rashin daidaituwa. Ingancin thyristor yana da kyau, amsawa yana da sauri kuma ƙarancin gazawar yana da ƙasa. Sabili da haka, an zaɓi thyristors na sanannun masana’antun, kuma ingancin abin dogara ne kuma barga.

(Lokacin da za a zaɓa, ana buƙatar mai yin tanderun lantarki don nuna mai ƙira na thyristor, kuma an gabatar da takaddun samfurin na masana’antar thyristor. Ma’aunin ingancin ingancin thyristor na H quality shine: Xiangfan Taiwan Semiconductor Co., Ltd., Xi ‘Institute of Power Electronics, da dai sauransu)

Power cabinet: The regular manufacturer uses the standard spray panel cabinet. Not a tin-painted cabinet. And the size specifications of the power cabinet are standard. Inconsistent manufacturers of power cabinets have also shrunk, height, width and thickness are not enough, and even some of the reactors are placed outside the power cabinet. The regular manufacturer’s IF power supply is equipped with a low-voltage switch inside, which does not require the user to configure the voltage switch cabinet. Some non-regular manufacturers do not have a low-voltage switch installed inside the power supply. Invisible increases the user’s cost (good quality low-voltage switches are Huanyu, Chint, Delixi, etc.).

Capacitor : Mafi mahimmancin ma’auni na capacitor don biyan wutar lantarki dole ne a sanye shi da isasshen adadin. Gabaɗaya, ƙimar diyya na capacitor shine 18—- sau 20 ƙarfin wutar lantarki: Adadin diyya (Kvar) = (20— 18) x wutar lantarki. Kuma amfani da capacitors na yau da kullum masana’antun.

Reactor: Babban abu na reactor shine takardar silicon karfe. Ya kamata a yi amfani da sabbin samfuran da masana’antun yau da kullun ke samarwa, kuma ba za a iya amfani da zanen ƙarfe na silicon na hannu na biyu ba.

Rufe bututun ruwa : A cikin cikakken saiti na matsakaicin matsakaiciyar wutar lantarki, akwai babban adadin bututun ruwa da aka haɗa. Magana mai mahimmanci, ya kamata a yi amfani da manne bakin karfe. Zai fi kyau a yi amfani da kullin zamewar jan ƙarfe. Ya dace don shigarwa da kuma rarraba kullin ba tare da kulawa ba. Ya dace musamman don aikace-aikacen akan igiyoyi masu sanyaya ruwa, wanda ke dacewa da watsawa na yanzu kuma baya haifar da zubar ruwa, wanda ke da aminci kuma abin dogaro.

Baya ga abubuwan da ke sama, akwai sauran abubuwan da za a zaɓa daga ciki, kamar inverter ba inductive capacitors, non-inductive resistors, igiyoyi masu sanyaya ruwa, haɗa sandunan tagulla, bututun ruwa, da sauransu, waɗanda zasu shafi inganci da farashi. na kayan aiki. A nan ba mu dalla-dalla ba, Ina fata za ku iya kula da lokacin da za ku saya, gwada ƙoƙarin buƙatar masana’anta na narkewa don samar da cikakkun bayanai game da manyan abubuwan da aka gyara da masana’antun, ba za ku iya watsi da tsarin kawai da ingancin kayan aiki fiye da farashin ba.

Tun da tanderun mitar matsakaici ba samfurin da ba daidai ba ne, an ba da umarnin a sake ƙera shi, kuma ingancin yana da alaƙa da farashin.

4, technical strength

Masu sana’a na yau da kullum sun zuba jari da yawa na ma’aikata da kayan aiki don bincikar fasaha mai zurfi, tare da kayan aiki masu mahimmanci da fasaha masu ban sha’awa, suna nuna nau’o’i daban-daban dangane da saurin narkewa, amfani da wutar lantarki da gazawar kayan aiki. Yawancin masana’antun ba su da yanayi don ƙaddamarwa a cikin shuka, farashin yana da ƙasa da ƙasa, kuma tasirin taro da ƙaddamarwa akan inganci yana da girma sosai. Masana’antun daban-daban, matakai daban-daban, da farashi daban-daban kuma suna samar da halaye daban-daban.

5, bayan sabis na tallace-tallace

Kyakkyawan sabis na tallace-tallace shine garantin ingancin kayan aiki. Babu makawa lokacin da samfuran lantarki suka gaza. Wannan yana buƙatar kyakkyawan sabis na bayan-tallace-tallace. Masu sana’a na yau da kullum suna da isassun ma’aikatan fasaha da kuma ikon yin garantin sabis na tallace-tallace. Matsakaicin mitar shigar da wutar lantarki yana da lokacin garanti na shekara guda bayan maimaita aiki mai ƙarfi da kuzari kafin barin masana’anta. A wannan lokacin, duk wani gazawar kayan aiki da alhakin wanda ba ɗan adam ya haifar ba zai zama alhakin masana’anta.

A takaice dai, masana’antar kafa ya kamata ta zaɓi kayan aikin da suka fi dacewa da halin da ake ciki na kasuwancin bisa ga ainihin buƙatu. A cikin tsarin zaɓin, mai ƙira ya kamata ya kwatanta masana’anta, daidaitawa, hanyoyin fasaha, da halayen sabis na bayan-tallace-tallace na kayan aiki don zaɓar kayan aiki masu gamsarwa.

Matsakaicin mitar tanderu ya haɗa da, mai canzawa, buɗe iska, matattarar jituwa, inverter cabinet, kebul na ruwa, naɗa induction, harsashi tanderu da makamantansu. Saituna daban-daban suna yiwuwa don kowane samarwa. Yana iya bambanta dangane da kayan, tsari da farashi. Zai fi kyau a tattauna farashin daban. A halin yanzu, matsakaicin matsakaicin wutar lantarki yana tasowa zuwa babban iko da babban iko. Matsakaicin mitar tan 1 ton ya riga ya zama ƙarami sosai. A halin yanzu, babu sababbi da yawa, amma fasahar ta balaga da arha.