How to locate the blocked pipe of a concrete pump trailer

　　In operation of a concrete pump trailer, pump operators are sometimes confronted with the challenge of locating the blocked part when the pipe gets plugged. The location of the pump pipe blockage should be checked according to the type of pump and the type of concrete.

　　For Mechanical Trailer Concrete Pumps

　　Restarts the pump for a short time. Due to the resistance caused by the blockage, the pipeline between the blockage point and the pump will cause significant vibration. The pipeline after the second point is stationary. If you cannot get a positive result with this method, stop the pump and start from one end of the pump. Check the pipe joints one by one, and loosen the first pipe joint slightly. If mortar does not come out under pressure, then this section is not blocked. Re-tighten the joint and come to the next joint. If mortar comes out, too, then the previous two sections are in a good state. Move to the third joint and repeat the steps above until you find the section whose pressure is abnormally small, which indicates that this joint is blocked from the previous joint.

　　Hydraulic Pumps and Squeeze Pumps

　　Temporarily reverse the pump to make the concrete flow back, and then have the concrete pump operate normally. Repeat the steps until the blockage disappears. If it does not work, check as what we do with a mechanical pump above. It’s worth mentioning that experienced pump operator are able to tell the location of the blockage by hitting the pump tube with a hammer. 　　

        Procedure for Clearing the Blockage

　　Remove the blocked pump tube and remove it manually. Reconnect this section of the pump tube to the output of the pump, and then start the pump at the material port to fill this section of pump tube with concrete mixture. Finally, connect this section of pump tube to other pump tubes to resume normal work.