How to solve the problem of blocked pipes in pump trucks

The problem of pump truck pipe blocking has always been the most difficult problem to solve during the concrete pouring process! It adds a lot of trouble to the workers on the front line of construction, which can be said to be time-consuming and labor-intensive. It also brings extended construction period and construction cost to the construction unit. Only by finding out the cause of the pipe blockage can this problem be solved and is it feasible? an effective solution.

There are many reasons for pipe blockage, and it is not a problem that can be avoided by solving one problem alone. Based on my own understanding of this industry, the editor mainly summarizes the following issues.

1. Job requirements for pump truck operators:

1. When operating pumping equipment, you must strictly follow the equipment instructions to standardize the operation and avoid making some incorrect operations. Man-made pipe blockage.

2. Due to the noisy construction environment, the operator must concentrate when operating the equipment. He should always pay attention to the reading of the pressure gauge of the pumping equipment. If the reading of the pressure gauge is found to be abnormal, he should immediately Repeat the operation of forward pump and reverse pump 3 to 4 times, and slight pipe blockage can basically be eliminated. If the reverse pump and forward pump are operated repeatedly and the pressure gauge does not return to normal and the pipe blockage problem has not been eliminated, you should immediately use a small hammer to gently tap the pump pipe along the pump pipe to identify the position of the pipe blockage from the sound feedback. If the sound is very crisp, it means If there is no blockage, but if the sound is dull, the location of the blockage can basically be determined. When the position of the blocked pipe is determined, you can use a wooden stick to hit the pump pipe repeatedly with appropriate force. The pumping equipment operator tries to operate the reverse pump and the forward pump. They need to cooperate at the same time. If this method cannot eliminate the blocked pipe, the pipe needs to be dismantled and manually operated. exclude.

3. When operating the pumping equipment, the operator must maintain a good grasp of the speed and follow the principle of step-by-step. Pumping cannot be carried out at full load before each start. At the beginning, due to the large resistance of the pump pipe, full load Pumping can easily cause pipe blockage, and the pumping speed should be increased after pumping is normal. During the pumping process, use the naked eye to observe the slump of concrete. If the slump of concrete in a truck is very small, the pumping speed needs to be reduced to minimize the probability of pipe blockage.

2. Requirements for laying pump pipes:

1. When laying pump pipes (mainly for ground pumps and trailer pumps), minimize 90-degree right-angle turns and S-shaped turns. , try to lay the pipeline in the shortest straight distance to reduce elbows, thereby reducing the resistance of concrete during pumping.

2. Long-distance or super-high-rise pumping requires the use of high-pressure pipes. When pipes need to be taken over during the pumping process, try to connect only one pipe at a time, and lubricate the inner wall of the pipe with water to reduce The probability of pipe blockage. 3. For the laying of super high-rise pipelines, the length of the horizontal pipe between the pump and the vertical pipe should be no less than 18 to 20 meters, and a straight valve should be installed at an appropriate position between the horizontal pipe and the vertical pipe. The elbow between the horizontal pipe and the vertical pipe should be a large-sized elbow. If there is a need to shut down during construction, the loading valve should be closed if the shutdown time exceeds 3 minutes to prevent concrete from flowing back and causing pipe blockage. During the shutdown period, the pumping equipment needs to be started every 5 to 10 minutes.

Three: Lubrication requirements for transportation pipelines:

Concrete pumping pipelines need to lubricate the inner wall of the pump pipe before each start of construction to reduce the resistance of concrete during pumping. There are two main ways to lubricate pump tubes. The editor believes that no matter which pipe lubrication method is chosen, the principles of energy saving, environmental protection, high efficiency, time saving, money saving and labor saving should be followed. This will not only comply with the national energy saving and emission reduction requirements, but also bring economic benefits to the construction unit. benefit.  

</p