1. Improper operation is very easy to create pipeline obstruction
Distribution pump operators need to concentrate on the pumping construction as well as always focus on the analysis of the pumping stress scale. When the stress scale reading is located instantly enhanced, concrete should right away be reverse pumed 2 ~ 3 strokes and after that forward pumped. In this way, pipe connecting can be gotten rid of. If the reversed pump has actually been accomplished (the pump has several procedure cycles, the pipe is still not eliminated, the pipe ought to be gotten rid of in time for cleansing, otherwise the pipe will certainly be extra major.

2. Incorrect choice of the pumping rate
When pumping, the selection of rate is really essential, the operator can not thoughtlessly map fast, occasionally extra rush is less rate. When the initial pumping, as a result of the huge pipeline resistance, it must be pumped at low speed. After the pumping is normal, the pumping rate can be appropriately raised. When there are indicators of blocked pipeline barring or an automobile of concrete collapse is tiny, it must be pumped at low rate to remove the obstructed pipeline in the bud.

3. Waste product quantity control is not proper
When pumping, the operator must observe the surplus product in the hopper at any time. The remaining product will not be less than the mixing shaft. If the staying product is inadequate, it is easy to inhale the air, bring about pipeline plugging. The product in the receptacle must not be piled excessive, need to be below the fence, in order to help with the prompt cleansing of coarse aggregate and big accumulation. When the collapse of an auto of concrete is little, the remaining product can be less than the blending shaft, controlled over the "S" pipeline or suction mouth, to lower the blending resistance, swing resistance and also suction resistance. These actions are just appropriate to the "S" shutoff series of concrete pumps.

4. Concrete collapse with hours to take incorrect steps
When it is located that there is a container of concrete collapse is really little, can not be pumped, the concrete from all-time low of the hopper, if hoggish to save problem, required pumping is easy to cause pipeline plugging. Do not include water in the hopper.

5. The shutdown time is too long
Throughout the shutdown duration, the pump must be switched on when every 5 ~ 10min (depending upon the air temperature, concrete collapse level and also concrete initial setup time) to stop pipeline plugging. For the downtime is too long, the preliminary condensation of concrete, should not continue to pump.

6. The pipeline is unclean
After the last pumping, the pipe is not cleaned, which will cause the next pumping pipe blockage. So each pumping need to be cleansed based on the operating treatments of the delivery pipeline.

2. Pipeline plugging due to pipe link factors
The following concepts will be followed when takeover:
( 1 )Pipeline layout should be arranged according to the shortest range, the least joint and the biggest elbow, so as to decrease the transmission resistance, as well as therefore minimize the possibility of pipe connecting.

( 2 )pump outlet cone pipeline, not directly attached to the bent pipe, at the very least 5mm straight pipeline, after that the bent pipeline.

( 3) During the pumping procedure, just one can be included each time, and the internal wall surface needs to be oiled by the pipe with water, with the air side-by-side, or else it is easy to cause pipe blockage.

( 4) vertical downward pipeline, the exit should be set up with fortification partition gadget to prevent pipeline plugging.

( 5 )When skyscraper pumping, the size of the horizontal pipe ought to generally be no less than 15% of the length of the upright pipe, as well as the pipe stop shutoff must be attached in the horizontal pipeline. When the downtime exceeds 5min, the stop valve must be closed to prevent the concrete backflow and cause the pipe connecting. For 90 degrees of flexing from horizontal to vertical, the flexing distance will be greater than 500mm.

3. Destion caused by partition of concrete or mortar
1) concrete or mortar in water, very easy to cause segregation. Occasionally when pumping mortar, connecting pipe sensation, is because the mortar and water in the pipe, mortar partition, prevention method is: before the pump water wet pipe, from the lowest pipe joint loosen up, put all the water, or after pumping water, prior to pumping mortar, right into a sponge ball, separate the mortar and water.

2) When the pump is pumped, we ought to likewise put a sponge round to divide the water from the concrete, otherwise it is very easy to cause pipe obstruction.

4. Pipeline connecting triggered by neighborhood slurry leakage
As a result of the leak of mortar, on the one hand, impact the high quality of concrete, on the other hand, slurry leakage will certainly lead to the collapse of concrete and also the loss of pumping pressure, leading to pipeline connecting. The major reasons for slurry leak are as complies with:

1) The sharing pipeline joint sealing is not stringent
The sharing pipe joint is not snugly secured, the pipe card is loose or the seal ring is harmed. Hold the pipe card or replace the securing ring immediately.

2) The void in between the eyeglass plate as well as the reducing ring is as well huge
When the glasses plate as well as the cutting ring are terribly worn, the void between them comes to be bigger. The space between the spectacles plate and also the cutting ring must be changed. If it can not be readjusted, the worn parts must be changed instantly. These steps are just applicable to the "S" valve series of concrete pumps.

3) The concrete piston wear is serious
Operators must frequently observe whether the water in the water storage tank is cloudy, there is no mortar, when located that the water has been muddy or water mortar, showing that the concrete piston has actually been used, at this time the piston must be changed in time, or else it will certainly be obstructed by slurry leakage and pressure loss, however likewise intensify the wear of the piston and communicating cylinder

4) Leakage of slurry caused by significant wear of concrete conveying cylinder.
If each piston is replaced, the water in the storage tank soon becomes over cast, as well as the piston is excellent, it shows that the conveying cyndrical tube has actually been worn, as well as the communicating cylinder needs to be changed.

5. Pipe plugging caused by unqualified pumping concrete
The concrete used for pumping must meet the needs of pumping concrete, not all concrete can be utilized for pumping, unqualified pumping concrete will worsen the wear of the pump, and also typically show up pipe plugging, pipeline ruptured as well as various other phenomena.

1) the concrete collapse is as well huge or as well small
The dimension of concrete collapse level directly shows the high quality of concrete fluidness, as well as the sharing resistance of concrete declines with the boost of concrete collapse level. The collapse degree of pumping concrete is usually within the variety of 8 ~ 18cm, for cross country and huge elevation pumping generally need to be purely managed at regarding 15cm. The collapse is as well little, which will certainly enhance the distribution pressure, intensify the devices wear, and also lead to pipeline plugging. The collapse is as well big, and the concrete under high pressure is very easy to partition and create pipeline connecting.

2) the sand content is too small, the rugged accumulation grading is not sensible

According to the source of fine accumulation can be divided right into river sand, fabricated sand (i. e., device sand), sea sand and hill sand, among which the river sand is the most effective, and also the pump of mechanism sand is the most awful. Great accumulation can be split right into crude sand, medium sand as well as great sand, among which the tool sand pumps the most effective.

Thick accumulation can be split into stones and crushed rock according to its form. Pebble pumps far better than crushed rock. The optimum fragment dimension of aggregate is likewise associated with the minimum size of the pipeline. The optimum fragment dimension of stone ought to be less than 1/ 3 diameter, and the maximum fragment size of gravel ought to be less than 1/ 4 diameter, otherwise it is simple to cause pipeline clog.

Due to the various products, the material of great aggregate (i. e., sand content), the grading of coarse accumulation have an optimal worth. Generally, the sand content ought to not be as well reduced, ought to be more than 40%, the material of big particle dimension coarse aggregate ought to not be too high. Practical choice of sand web content as well as accumulation grading are vital to improve the pumping efficiency of concrete and also protect against pipe connecting.

3) the cement dosage is insufficient or way too much
In the pumping concrete, concrete cementing impact as well as lubrication result, at the same time concrete has excellent water efficiency, make the concrete in the process of pumping water, cement dosage is a finest value, if cement dosage is too little, will seriously affect the suction efficiency of concrete, and also boost the pumping resistance, the water retention of concrete bad, easy to hemorrhaging, segregation and connecting tube. Under regular scenarios, the web content of concrete per cubic meter of concrete should be above 320kg, however likewise not also big, the amount of concrete is also large, will certainly boost the viscosity of concrete, causing the rise of transportation resistance.

Additionally, the amount of concrete is additionally associated with the shape of the accumulation. The larger the area of the aggregate, the more concrete slurry needs to be wrapped, and also the better the material of cement. As a result, reasonably identify the amount of cement, to improve the pumping of concrete, stop pipe is likewise really vital.

4) the option of admixture is unreasonable

There are lots of type of admixture, such as: gas representative, water minimizing agent, superplasticizer, retarder, pumping agent, etc, according to the stamina needs of concrete as well as the range of concrete, affordable option of admixture, to play a really crucial duty in boosting the pumping performance of concrete. Unreasonable admixture will make the concrete pumping as well as fluidity worse, bring about pipe connecting.

6. the quantity of mortar is too small or the unqualified mix ratio is triggered by the blocked pipeline

1) Mortar dosage is inadequate
Since the very first pumping, the blending engine, concrete conveyor blending tank, hopper, pipe, and so on to take in part of the mortar, if the quantity of mortar is inadequate, will certainly result in part of the conveying pipe is not oiled, resulting in pipe plugging. The proper quantity of mortar should be determined according to about 0.5 m3 mortar for every 200m pipeline, and also concerning 0.2 m3 mortar for blending main engine, hopper and concrete conveyor mixing tank. For that reason, the quantity of mortar have to be calculated prior to pumping. Inadequate mortar is simple to block the pipeline, too much mortar will influence the quality of concrete or trigger unnecessary waste.

2) the mortar mix proportion is unqualified
The mix proportion of the mortar is additionally vital. When the pipeline size is less than 150m, make use of 1:2 cement mortar (1 cement/ 2 mortar); when the pipeline size is above 150m, utilize 1:1 cement mortar (1 cement/ 1 mortar), inadequate cement dosage will certainly additionally cause pipe plugging.

7. Pipeline clog brought on by temperature modification

The summertime temperature is high, the pipeline in the strong sunshine, the concrete is easy to dehydration, resulting in pipe blocking, so the pipe needs to be covered with wet straw bags or other cooling materials. Thermal insulation measures need to be taken in winter months to make certain the temperature of the concrete.

The above are a number of common reasons as well as safety nets for pipeline clog. In the actual manufacturing procedure, as a result of the adjustments of exterior conditions, the factors for pipeline obstruction are often more than these. Yet as long as we purely follow the operating treatments, stop small troubles, and constantly summarize the experience and also lessons from each pipeline clog, we will have the ability to minimize the opportunity of pipe clog.