In view of the tube plugging phenomenon of concrete shotcrete machine that we often encounter, we have summarized the following reasons:
1. Failure to control the remaining material. When we are pumping, the relevant personnel must observe the remaining material in the hopper at any time, and it must not be lower than the stirring shaft. If it is too small, it is easy to inhale air and cause tube blocking. Of course, there should not be too much material in the hopper, at least it should be lower than the protective fence, so that it is easy to timely clean up coarse aggregates and oversized aggregates.
2. Did not clean the pipes. After the pumping is completed, if the pipeline is not cleaned, it will cause the pipe to be blocked during the next pumping, so it must be cleaned after each pumping.
3. The operator's own problems are generally caused by their inattention. In fact, the operator must concentrate when pumping the concrete shotcrete machine. Once he finds that the pressure gauge reading suddenly increases, he should immediately reverse the pump for 2-3 strokes, and then forward the pump. Eliminate pipe blocking.
4, caused by excessive downtime. Generally speaking, during the shutdown period, the pump should be turned on every 5-10min to prevent pipe blocking.
From the above, it can be seen that as long as the staff works strictly in accordance with the process, the occurrence of pipe blocking can be well avoided.
