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泵送混凝土堵管故障

(2009-03-23 10:10:22)
标签:

杂谈

1堵管原因
  正常情况下,混凝土在泵送管道中心形成柱状流体,呈悬浮状态流动。流体表面包有一层水泥浆,水泥浆层作为一种润滑剂与管壁接触,骨料之间基本上不产生相对运动。当粗骨料中的某些骨料运动受阻,后面的骨料运动速度因受影响而渐渐滞缓,致使管道内粗骨料形成集结,支撑粗骨料的砂浆被挤走,余下来的间隙由小骨料填补。这样,骨料密度增大,使该段管道内集合物沿管道径向膨胀,水泥浆润滑层被破坏,运动阻力增大,速度变慢,直至运动停止而产生堵塞。
  2堵管位置的判断及排除方法
  2.1进料口处的堵塞
  现象:泵送动作及液压系统均正常,无异常声音和振动,料斗内有较大骨料或结块,在进料口处卡住或拱起而堵塞。
  排除方法:使泵反向运转以破坏结块,使混凝土回到料斗重新搅拌,再正向泵送。如果不起作用,则需人工清理,予以排除。
  2.2分配阀出料口处的堵塞
  现象:泵送系统动作突然中断,并且有异常声响,设备有较强振动,但管道内无相应振动。
  排除方法:往料斗内倒入15~30L水泥浆,反复正、反向启动泵,迫使通路打开。如果此法无效,也只能人工排除,拆下相连管,去掉阀内杂物。
  2.3S管阀处堵塞
  现象:S管阀处堵塞是逐渐形成的,其主要原因是泵送完混凝土后,没有及时用高压水冲洗,致使混凝土残留在S管内,天长日久逐渐加厚,堆积固结,造成堵塞。
  排除方法:泵送混凝土结束后,一定要用高压水将泵体和S管冲洗干净。当冲洗无效时,可采用钎敲,以把残渣去掉,直至彻底干净为止。

One reason for blocking pipe
Under normal circumstances, concrete pumping pipe center at columnar fluid flow status was suspended. Coated with a layer of fluid cement slurry, water slurry as a lubricant layer and the wall contact between the aggregate is basically no relative movement. When the coarse aggregate in the exercise of certain aggregate blocked, behind the aggregate due to the impact velocity gradually slow, resulting in the formation of coarse aggregate tube assembly, supporting coarse aggregate of the mortar was挤走, the remaining gap from small aggregates to fill. In this way, aggregate density, so that the paragraph collection tube radial expansion of material along the pipeline, slurry lubrication layer is damaged, increasing the resistance exercise, slow down, stop the exercise until the resulting plug.
2 blocked tubes to determine the location and elimination methods
2.1 feed Department plug
Situation: pumping action and hydraulic systems are normal, no abnormal sound and vibration, there is a larger hopper with aggregate or agglomerate, feed at the mouth Department and plug stuck or arch.
Exclude Ways: To enable reverse operation of pumps in order to undermine the caking so that concrete hopper back to re-mixing, and then being pumped. If does not work, it would take manual clean-up, be ruled out.
2.2 out of feed distribution valve plug mouth Department
Phenomenon: a sudden interruption of pumping system moves, and there is abnormal sound equipment there is a strong vibration, the tunnel is no corresponding vibration.
Excluded methods: to hopper inside the 15 ~ 30L of water poured into the mud again and again is, reverse to start pumps, forcing the channel to open. If this law is invalid, and can only rule out the possibility of artificial, removed connected to tubes, remove the valve inside the debris.
Department plug valve 2.3S
Situation: S pipe valve plug Department are gradually formed, and its mainly due to pumping concrete End, the failure to make timely use of high-pressure water washing, with the result that concrete residue in the S-tube,天长日久gradual thickening, the accumulation of consolidation, resulting in congestion.
Exclude Methods: After the end of pumping concrete, must use high-pressure water pump body and the S tube under running water. When washing is invalid, the solder may be out to put the residue to remove, until thoroughly until clean.

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