1. Pipes are not cleaned

After the last pumping, the pipe was not cleaned, which would cause the pipe to block during the next pumping.So every pump must be completed in accordance with the operating procedures of the pipeline clean.

2. Pipe blockage caused by pipe connection

The wrong connection method of pipeline can easily lead to pipe blockage.

3, concrete or mortar segregation caused by pipe blocking:

Concrete or mortar in contact with water, easy to cause segregation.Sometimes when pumping slurry pipe blocked, because of the mortar after direct contact with the water in the pipeline, slurry, which is caused by the segregation of prevention measure is: before the pump after wet with water pipe, from low to pipe joints loosen, more than to put away all the water, or after the water pump, pumping slurry before, into a sponge ball, mortar is separated from water.

When the pump is finished cleaning the pipe, also put in a sponge ball, separate the water from the concrete, otherwise it is very easy to block the pipe.

4. Blockage caused by partial leakage of slurry:

The leakage of mortar, on the one hand, affects the quality of concrete; on the other hand, after the leakage of slurry, it will lead to the reduction of concrete collapse degree and the loss of pumping pressure, resulting in pipe blockage.The main reasons for slurry leakage are as follows:

4.1 concrete piston is badly worn

Operators should often observe whether the water in the tank is cloudy, there is no mortar, once found that the water has been cloudy or there is mortar in the water, indicating that the concrete piston has been worn, at this time should be timely replacement of the piston, otherwise due to leakage of slurry and pressure loss and lead to tube plugging, but also aggravate the piston and transport cylinder wear.

4.2 slurry leakage caused by severe wear and tear of concrete conveying cylinder

If every time after the replacement of the piston, the water in the tank quickly become cloudy, and the piston is good, it shows that the cylinder has been worn out, at this time need to replace the cylinder.

5. Pipe plugging caused by temperature change:

Summer temperature is higher, the pipeline in the strong sunlight, the concrete is easy to dehydrate, resulting in blockage of the pipe, so in the pipeline should be covered with wet straw bags or other cooling supplies.Insulation measures should be taken in winter to ensure the temperature of concrete.

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