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【干货】污水处理中阀门的安装原则及要求!

2022-09-08 11:47:11来源:环保小蜜蜂 阅读量:17812

导读:阀门安置原则、阀门的设备方位请求以及水平管道上阀门的设置请求等内容,一文了解!
  1 阀门的安置原则
 
  1.1 阀门应根据管道及仪表流程图(PID)上所示类型及数量设置。当PID 对某些阀门的设备方位有具体请求时,应按技术请求设置。
 
  1.2 阀门应安置在简单挨近、便于操作、修理的当地。成排管道上的阀门应会集安置,并思考设置操作渠道或梯子。
 
  2 阀门的设备方位请求
 
  2.1 进出设备的管廊管道在与全厂管廊上的主管相接时,均须设置切断用阀门。阀门的设备方位应会集安置在设备区一侧,并设置必要的操作渠道或维修渠道。
 
  2.2 需求常常操作、修理和替换的阀门,应坐落地上、渠道或梯子简单挨近处。气动和电动阀也一样应安置在简单挨近处。
 
  2.3 不需求常常操作的阀门(只在开泊车时运用),如果在地上上无法操作时,也应安置在能架设暂时梯子的当地。
 
  2.4 阀门手轮的基地距操作面的高度为750~1500mm 之间,最适宜的高度为
 
  1200mm,不需求常常操作的阀门设备高度可达1500~1800mm。当设备高度无法下降且又需求常常操作时,设计时应设置操作渠道或踏步。风险介质的管道和设备上的阀门,不得在人的头部高度范围内设置。
 
  2.5 阀门手轮的基地距操作面的高度超越1800mm 时,宜设置链轮操作,链轮的链距地上宜为800mm 摆布,并应设链轮挂钩,将链子下端挂在邻近的墙上或柱子上,避免影响通道的通行
 
  2.6 设置在管沟内的阀门,当打开沟盖板可以操作时,阀门的手轮不该低于沟盖板下300mm,当低于300mm 以下时,应设阀门伸长杆,使其手轮在沟盖板下100mm以内。
 
  2.7 设置在管沟内的阀门,需求在地上上操作时,或设备在上一层楼面(渠道)下方的阀门,可设阀门伸长杆使其延伸至沟盖板、楼板、渠道上面操作,伸长杆的手轮距操作面1200mm 为宜。公称直径小于和等于DN40 及螺纹衔接的阀门不该运用链轮或伸长杆进行操作,避免损坏阀门。通常情况下,应尽量少用链轮或伸长杆操作阀门。
 
  2.8 安置在渠道周围的阀门手轮距渠道边缘的间隔不宜大于450mm。当阀杆和手轮伸入渠道内的上方且高度小于2000mm 时,应使其不影响操作人员的操作和通行,避免形成人身损伤。
 
  3 大型阀门的设置请求
 
  3.1 大型阀门的操作应运用带齿轮传动组织,设置时应思考传动组织所需空间方位。通常,阀门的尺度大于下列等级的尺度应思考运用带齿轮传动组织的阀门。
 
  3.2 大型阀门应在阀门的一侧或两边设置支架,该支架不该设在维修时需求拆开的短管上,并思考拆下阀门时不该影响管道的支承。通常支架与阀门法兰的间隔应大于300mm。
 
  3.3 大型阀门的设备方位要有运用吊车的场所,或思考设吊柱、吊梁。
 
  4 水平管道上阀门的设置请求
 
  4.1 除技术还有特殊请求外,通常水平管道上设备的阀门手轮不得朝下,尤其是风险介质管道上的阀门严禁手轮朝下。阀门手轮的方位按下列顺序断定:笔直向上;水平;笔直向上的左、右倾斜45°;笔直向下的左、右倾斜45°;不得笔直向下。
 
  4.2 水平设备的明杆式阀门,当阀门敞开时,阀杆不得影响通行,特别是阀杆坐落操作人员的头部或膝部时更要注意。
 
  5 阀门设置的其它请求
 
  5.1 平行安置管道上的阀门,其基地线应尽量取齐,阀门相邻安置时,手轮间的净距不该小于100mm;阀门也可错开安置,以削减管道距离。
 
  5.2 技术上请求与设备管口相衔接的阀门,当公称直径、公称压力、密封面型式等与设备管口法兰一样或般配时,应当直接与设备管口相衔接。当阀门上是凹面法兰时,要提请设备专业在相应的管口配置凸面法兰。
 
  5.3 除技术有特殊请求外,塔、反应器、立式容器等设备底部管道上的阀门,不得安置在裙座内。
 
  5.4 从干管上引出支管时,其切断阀应设在接近干管根部的支管水平段上,以便流体向阀门两边排净。
 
  5.5 管廊上的支管切断阀不常常操作(仅在泊车维修时用),若没有设永久性梯子时,应思考留出运用暂时梯子的空间方位。
 
  5.6 高压阀门敞开时发动力大,有必要设置支架以支承阀门和削减发动应力,其设备高度以500~1200mm 为宜。
 
  5.7 设备界区的消防水阀、消防蒸汽阀等应分散安置,且在发作事端时操作人员易挨近的安全地带。
 
  5.8 加热炉救活蒸汽分配管的阀组应便于操作,分配管距炉体不宜小于 7.5m。
 
  5.9 管道上设备螺纹衔接的阀门时,在阀门邻近有必要设备活接头,以便拆开。
 
  5.10 对夹式阀门或蝶阀不得与其他阀门和管件的法兰直接衔接,中间应加一段
 
  两头带法兰的短管。
 
  5.11 阀门不宜承受外加荷载,避免应力过大损坏阀门
 
  原标题:【干货】污水处理中阀门的安装原则及要求!

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