Pipe catch errors can easily lead to blocking of pipes. The following principles should be followed

Pipe arrangement should be based on the shortest distance, the minimum elbow and the maximum elbow lay the pipe, as far as possible to reduce the transport resistance, which also reduces the possibility of blocking the pipe.

Concrete pump outlet cone pipe, not directly to the elbow, at least should be connected to more than 5m straight pipe, and then the elbow.

Pumping to take over midway, each time can only add one, and the application of water lubrication pipe wall, side by side exhaust air, otherwise it is very easy to cause blocking pipe.

Vertical downward line, the exit should be equipped with anti-separation device, to prevent blocking pipe.

When pumping high-rise, the length of the horizontal line should generally not be less than 15% of the length of the vertical line, and the horizontal line should be connected to the line shut-off valve. When downtime exceeds 5min, the shut-off valve should be closed to prevent concrete from refluxing, resulting in a blocking pipe. 90 degree elbow stowby swbys from horizontal to vertical, bending radius should be greater than 500mm.