意大利UNIVER電磁閥BE-4850B
意大利UNIVER電磁閥BE-4850B
電磁閥符號(hào)的含義
電磁閥符號(hào)由方框、箭頭、“T”和字符構(gòu)成。電磁閥圖形符號(hào)的含義一般如下：1、用方框表示閥的工作位置，
每個(gè)方塊表示電磁閥的一種工作位置，即“位”
有幾個(gè)方框就表示有幾“位”，如二位三通表示有兩種工作位
置。上圖的“非通電”和“通電”就是兩個(gè)不同的工作位置。
2、識(shí)別常態(tài)位。電磁閥有兩個(gè)或兩個(gè)以上的工作位置，其中一個(gè)為常態(tài)位，即閥芯在非通電時(shí)所處的位置。對(duì)
于二位閥，利用彈huang復(fù)位的二位閥則以靠近彈huang的方框內(nèi)的通路狀態(tài)為其常態(tài)位。對(duì)于三位閥，圖形符號(hào)中的中
位是常態(tài)位。繪制系統(tǒng)圖時(shí)，油路/氣路一般應(yīng)連接在換向閥的常態(tài)位上。
3、方框內(nèi)的箭頭表示對(duì)應(yīng)的兩個(gè)接口處于連通狀態(tài)
4、方框內(nèi)符號(hào)“T”表示該接口不通。
5、方框外部連接的接口數(shù)有幾個(gè)，就表示幾“通
6、一般，流體的進(jìn)口端用字母P表示，排出口R表示，而閥與執(zhí)行元件連接的接口用A、B等表示。
下例中，二位三通電磁閥有兩個(gè)工作位置和三個(gè)通氣接口，三個(gè)接口分別為進(jìn)氣口（P）工作出氣口（A)，還有
一個(gè)放氣口（R）當(dāng)電磁閥得電勵(lì)磁時(shí)，P和A通；失電回到常位態(tài)時(shí)，R和A通。
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