如何排除水位计的常见故障?

2025年03月15日 23:29
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水位计的常见故障及其产生的原因和排除方法:1、两个水位计指示不一样故障原因:水位计安装位置不正确,汽、水连通管堵塞或受汽水混合物冲击影响,在引出管区域内形成压差。排除方法:1)疏通汽、水连通管。2)将汽、水连通管引出压差区,避免汽、水混合物冲击的影响:2、水位计内积水造成假水位故障原因:汽、水连通管较长.由于安装或运行中震动等影响,造成水位计下沉致使水位计内积水造成假水位。排除方法::将水位计汽、水连通管缩短,排除震动的原因,并校正水位计。3、水位呆滞不动故障原因:1)由锅内锅水中的泥垢或盐类积聚在水旋塞内,水旋塞被堵塞。2)同样原因,汽旋塞被堵塞,蒸汽管路不通,水位计中蒸汽被冷凝,水位升高,高于锅筒内实际水位,且水位变动很小。3)玻璃管式水位计由于玻璃管长度不够,水位计通路被填料盒中密封填料堵塞,致使水位计充满或高于锅筒实际水位,且水位呆滞。排除方法:1)吹洗水旋塞阀或连通管或用弯成L型的铁丝疏通。2)吹洗汽旋塞阀。3)更换玻璃管。4、冷水旋塞不严,漏水、漏汽。4、冷水旋塞不严,漏水、漏汽。当汽旋塞漏汽时,水位中汽空间压力降低.水位计水位比锅筒水位略有升高。当水旋塞或吹洗旋塞泄漏时,水位计中水位低于锅筒中的水位。故障原因:1)旋塞质量不良,制造有缺陷;2)旋塞阀接触面磨损,研磨不良;3)压盖或填料过松,填料不足或填料变质等;4)平板玻璃与表壳接触不严密,容易产生漏汽。排除方法:1)更换旋塞阀。2)小心研磨旋塞或旋紧填料压盖。5、水位玻璃破裂5、水位玻璃破裂故障原因:1)水位计上下接头(管座)或汽水旋塞阀中心线不在同一中心线上,玻璃管(板)被扭断。2)更换的玻璃管(板)未经预热。3)旋塞开得太快,冷热变化剧烈。4)玻璃管(板)质量不好或选用不当。5)玻璃管切割时管端有裂口。6)玻璃管安装时未留膨胀间隙或填料压得太紧。7)平板玻璃水位计安装时螺栓旋紧时用力不均。8)玻璃上被冷水溅到表面或表面有肥皂液或油污。9)过堂风吹入。排除方法:1)校正或对正接头(管座)中心线。2)按水位计预热操作 。3)按水位计吹洗方法操作。4)更换玻璃管、板。5)留膨胀间隙或将填料适当地压紧。6)螺栓旋紧时用力均匀。7)防止冷水,冷空气等使水位计急剧冷却。6、水位计中有汽泡6、水位计中有汽泡故障原因:水连通管较长,绝热不好,受烟气加热,水连通管中的水部分产生蒸汽。排除方法:做好绝热保护,消除烟气加热。

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