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電泳技術(shù)

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電泳槽循環(huán)泵簡介中英對照版

1383 人參與 2012年01月20日 00:00 分類 : 電泳設(shè)備電泳設(shè)備工藝評論

?Pumps????????? 泵

End suction centrifugal pumps, both horizontal and vertical, are commonly used in electrocoat systems. The choice of pumps should be determined by economics, design constraints, or designer preference. 在電泳系統(tǒng)中，一般使用臥式及立式端吸式離心泵，泵的選用取決于經(jīng)濟條件，設(shè)計的限制或設(shè)計師的偏好。 Vertical turbine pumps (equivalent to Process Systems Thrust Head) have proven cost effective due to the ease of maintenance and long service life. 垂直渦輪泵（相當(dāng)于系統(tǒng)過程推動頭）由于易于維修和較長的使用期限已被證明是節(jié)省成本的。 Vertical, chair-mount pumps in weirs are equipped with long shafts to prevent foaming which can occur with changing weir levels. The suction bell extension? should be no closer than? 1.5 pipe diameters of the weir bottom to minimize vortexing and permit greater pump-down of the weir during tank cleaning.? All pumps should be protected to prevent large debris from damaging impellers and pump housings. Vertical pumps should be equipped with a removable stainless steel screen (.25 inch dia.) installed ahead of the pump. A non-conductive coating should be applied to the screen to prevent paint from coating the screen. (Electrocoating the screens in the electrocoat tank and then baking them has worked well.) The screens should be checked for plugging daily and cleaned once per month. 安裝在溢流槽中的立式泵要求長軸，可防止在改變溢流液位時產(chǎn)生泡沫，長軸也要有較粗的軸徑，以延長使用壽命，泵吸口要伸到距溢流槽底不少于1.5倍管徑處，以盡量減小渦流及在清理溢流槽時能夠較大限度的抽空溢流槽。所有泵都應(yīng)有防止大的染質(zhì)損壞葉輪及泵谷的保護(hù)措施。立式泵要配有安在泵頭（吸口）的雙層可拆卸不銹鋼網(wǎng) （0.25英尺的直徑），要將鋼網(wǎng)涂以絕緣涂層以防止沉積上電泳漆（在電泳槽中泳好的鋼絲網(wǎng)，烘干后即可），對保護(hù)網(wǎng)應(yīng)每天要進(jìn)行堵漏檢查并每月清洗一次。 Horizontal pumps should be equipped with reliable valves to isolate the pump from the system. The pumps should also be installed so that they have a low point drain and a DI water connection to permit pump flushing. The installation of spare pumps piped into the system is not recommended. They have been found to be a source of dirt and are difficult to keep clean.? However, a spare pump housing should be available on site for replacement during maintenance.? If, spare pumps are piped into the system they should be isolated from the paint and flushed with DI water when not in use. 臥式泵必須配有可靠的閥將泵與系統(tǒng)分隔，泵還要裝低位排凈口及供沖洗用的去離子水接管口，我們發(fā)現(xiàn)備用泵是污染源，并且很難保持清潔，因此不推薦將備用泵安裝在系統(tǒng)中。然而，應(yīng)該是在維修過程中更換使用的備用泵，如果用管路將備用泵接入系統(tǒng)中，必須將其與漆液隔離，不使用時必須用去離子水沖洗，建議采用柔性泵連接件以減小管路張力及增加泵機械密封的壽命。 Pump housings should be constructed of gray cast iron: nodular cast iron should not be used. Impellers and shafts should be made of 316 stainless steel to minimize wear.? (See Figure 8 for typical circulation system layouts). 泵轂要用灰鑄鐵，不要使用球墨鑄鐵，葉輪及軸要用316不銹鋼制成，以降低磨損（見圖8典型的循環(huán)系統(tǒng)布置）。

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