In contemporary structure construction, in order to seek reliable as well as accurate building and construction effect, people depend upon advanced concrete equipment and equipment more and more. Whether in large building jobs or small civil building and construction tasks, or unique building and construction projects in remote locations, concrete pumping devices can be seen almost everywhere. Nevertheless, how to use these devices to attain quick as well as reliable building and construction in the best degree, and good advantages finally? Perhaps the following words can give you some inspiration.
1.Inappropriate operation is easy to trigger pipe obstruction
(1)The operate is not focused
Distribution pump operations should focus on the pumping construction, always take notice of the analysis of the pumping pressure scale. As soon as the pressure gauge reading is discovered unexpectedly boosted, driver should right away turn around the pump 2-3 strokes, deal with the pump, pipe connecting can be removed. If the reverse pump has actually been carried out (the pump has numerous procedure cycles, the pipe is still not gotten rid of, the pipeline ought to be gotten rid of in time for cleansing, otherwise the pipe will certainly be extra severe.
(2)Improper option of the pumping speed
When pumping, especially when high-rise pumping , the selection of speed is very crucial, the driver can not thoughtlessly for quick, often a lot more haste is less rate. For the very first pumping, as a result of the large resistance of the pipe, it should be pumped at reduced speed. After the pumping is regular, the pumping rate can be appropriately raised. When there are indicators of blocked pipeline barring or a truck of concrete collapse is tiny, it ought to be pumped at reduced speed to remove the blocked pipeline.
(3) Waste Material Amount Control Is Not Suitable
When pumping, the operator needs to observe the staying material in the receptacle any time, and also the staying material shall not be less than the mixing shaft. If the continuing to be material is inadequate, it is simple to inhale air, causing pipe connecting. The product in the receptacle should not be piled too much, ought to be below the fence, in order to help with the timely cleansing of rugged accumulation and huge accumulation. When the collapse of a cars and truck of concrete is tiny, the continuing to be product can be lower than the mixing shaft, regulated above the “s” pipe or the suction mouth, to reduce the blending resistance, turn resistance and also suction resistance. These actions are just applicable to the “s” valve series of concrete pumps.
(4) Take Improper Steps to Too Small Concrete Collapse
When it is discovered that there is a container of concrete collapse degree is very small as well as concrete can not be pumped, it needs to be gotten rid of from all-time low of the receptacle in time. Otherwise, and also forced pumping, it is easy to cause pipeline stopping. Do not add water in the hopper.
(5) The Downtime Is Too Long
Throughout the closure duration, the pump needs to be activated when every 5-10 mins (depending upon the air temperature level, concrete collapse degree as well as concrete first setting time) to avoid pipe connecting. For the downtime is too long, the initial condensation of concrete, need to not remain to pump.
(6) The Pipe Is Not Cleaned
After the last pumping, the pipe is unclean, which will certainly cause the following pumping pipeline connecting. So each pumping have to be cleaned up according to the operating procedures of the shipment pipeline.
2. Pipe Plugging Because Of Pipe Connection Reasons
The adhering to principles will be complied with when requisition.
(1) Pipe design must be organized according to the shortest range, the least joint as well as the largest arm joint, so regarding lessen the transmission resistance, and hence minimize the opportunity of pipeline plugging.
(2) Pump electrical outlet cone pipeline can not be directly connected to the bent pipe, at the very least 5mm straight pipeline, then the curved pipeline.
(3) During the pumping procedure, just one can be included each time, as well as the inner wall surface must be oiled by water, and discharge the air entirely, otherwise it is very easy to trigger pipe obstruction.
(4) Stronghold segregation tool need to be installed at the leave of the vertical downward pipeline, to stop pipe connecting.
(5) For top-level pumping, the length of the straight pipeline shall normally not be less than 15% of the length of the vertical pipeline, and also the pipeline quit valve shall be connected in the horizontal pipe. When the downtime exceeds 5min, the quit shutoff ought to be closed to stop the concrete heartburn and trigger the pipe plugging. For 90 levels of flexing pipe from horizontal to vertical, the bending radius will be greater than 500mm.
3. Pipe Clog Triggered By Segregation Of Concrete Or Mortar
(1) When concrete or mortar satisfies water, it is easy to create partition. Often when pumping mortar, the sensation of pipe plugging takes place, it is since the mortar as well as the
water in the pipe get in touch with directly, created mortar partition. The avoidance approach is:
After wetting the pipe with water before pumping, loosen up the pipeline joint from the lowest point of the pipe, get rid of all the staying water. Or after pumping water, before pumping the mortar, placed a sponge sphere to divide the mortar from water.
(2) When the pumping is done, we should additionally put a sponge sphere to separate the water from the concrete, otherwise it is simple to cause pipeline clog.
4. Pipe Plugging Triggered By Regional Slurry Leak
Due to the leakage of mortar, on the one hand, affect the quality of concrete, on the other hand, slurry leak will certainly bring about the collapse of concrete and also the loss of pumping stress, causing pipe plugging. The major reasons for slurry leak are as follows:
(1) The communicating pipe joint securing is not tight
The conveying pipeline joint is not tightly secured, the pipeline clamp hangs or the seal ring is damaged as well as slurry. Hold the pipeline clamp or replace the sealing ring.
(2) he space in between the spectacles plate as well as the cutting ring is too huge
When the glasses plate and also the cutting ring are terribly put on, the space between them becomes larger. Slim the gap in between the glasses plate and the reducing ring by adjusting the unusual bolts. If it can not be readjusted, the wear components ought to be replaced promptly. These procedures are just appropriate to the “s” shutoff series of concrete pumps.
(3) The concrete piston is major
Operators must typically observe whether the water in the water container is over cast and also there is no mortar. Once found that the water has actually been sloppy or water mortar, indicating that the concrete piston has actually been worn, currently the piston ought to be changed in time, otherwise it will be blocked by slurry leak as well as stress loss, and worsen the wear of the piston and also conveying cylinder
(4) The slurry leak triggered by the serious wear of the concrete sharing cylinder.
If each piston is replaced, the water in the tank soon ends up being cloudy, yet the piston is great, it suggests that the sharing cyndrical tube has actually been used, and also the sharing cylinder must be replaced.
5. Pipe plugging caused by unqualified pumping concrete
The concrete utilized for pumping should meet the requirements of pumping concrete. Not all concrete can be utilized for pumping, unqualified pumping concrete will aggravate the wear of the pump, and also typically appear pipe plugging, pipeline ruptured as well as various other sensations.
(1) The concrete collapse is as well large or also small
The dimension of concrete collapse level directly reflects the top quality of concrete fluidity, and the sharing resistance of concrete declines with the rise of concrete collapse level.
The collapse degree of pumping concrete is generally within the variety of 8 ~ 18cm, for far away as well as big height pumping usually require to be purely managed at regarding 15cm. The collapse is too tiny, which will certainly increase the distribution stress, worsen the devices wear, as well as bring about pipeline plugging. The collapse is also big, and also the concrete under high pressure is simple to partition and also cause pipe plugging.
(2) Sand material is as well small, coarse aggregate grading is not affordable
According to the resource of fine accumulation can be divided right into river sand, synthetic sand (i. e., mechanism sand), sea sand and also mountain sand, amongst which the river sand is the most effective, as well as the pump of mechanism sand is the worst. Fine aggregate can be divided into crude sand, tool sand as well as great sand, amongst which the medium sand pumps the most effective.
Thick accumulation can be separated into pebbles and gravel according to its shape. Stone pumps better than crushed rock. The optimum fragment size of accumulation is additionally associated with the minimum diameter of the pipe. The optimum fragment dimension of pebble should be less than 1/ 3 diameter, and also the optimum fragment size of crushed rock should be less than 1/ 4 diameter, otherwise it is very easy to cause pipeline clog.
As a result of the various materials, the web content of great accumulation (i. e., sand content), the grading of coarse accumulation have an optimal value. Usually, the sand web content must not be too reduced, must be more than 40%, the web content of huge bit size coarse aggregate ought to not be expensive. Affordable choice of sand content and also accumulation grading are critical to boost the pumping efficiency of concrete and also avoid pipeline connecting.
(3) The concrete dose is insufficient or way too much
Concrete in the pumping of concrete, play the sealing duty and also lubrication duty. At the same time, the cement has a great water-retention efficiency, making the concrete more difficult to drain pipes throughout the pumping procedure. There is additionally an optimal value for the amount of concrete utilized. If the quantity of cement made use of is as well little, it will seriously affect the suction performance of the concrete, raise the pumping resistance, wear away the water retention of the concrete, and be prone to bleeding, partition, and also pipeline blockage. As a whole, the cement web content in each cubic meter of concrete should be greater than 320kg, but it should not be as well huge. If the cement dose is also large, it will certainly raise the viscosity of the concrete, resulting in a boost in conveying resistance.
Furthermore, the quantity of cement utilized is also related to the form of the aggregate. The larger the surface of the aggregate, the even more concrete slurry needs to be covered, and also likewise, the higher the cement content. For that reason, establishing the amount of concrete sensibly is additionally important for improving the pumpability of concrete and preventing pipeline obstruction.
(4) Unreasonable choice of ingredients
There are several kinds of admixtures, such as air entrainers, water reducers, superplasticizers, retarders, pumping agents, and so on. Affordable selection of admixtures based upon the toughness needs of concrete and the range of cement plays a crucial duty in enhancing the pumping performance of concrete. Unreasonable admixtures will certainly deteriorate the pumpability and flowability of concrete, bring about pipe clog.
6. Pipeline blockage brought on by insufficient mortar or unqualified mix proportion
( 1 )The amount of mortar used is too low
Because during the first pumping, the blending device, concrete delivery truck, blending tank, receptacle, pipeline, etc all require to absorb a section of the mortar. If the quantity of mortar used is too tiny, it will certainly trigger several of the sharing pipes to not be lubed, bring about pipe obstruction.
The correct quantity of mortar should be computed as approximately 0.5 m3 of mortar per 200m of pipe, and also approximately 0.2 m3 of mortar is needed for the mixing equipment, receptacle, concrete conveyor vehicle, and blending container.
As a result, it is essential to calculate the amount of mortar before pumping. Insufficient mortar can conveniently obstruct the pipe, and too much mortar will certainly influence the high quality of concrete or cause unnecessary waste.
( 2 )The mortar mix proportion is not qualified
The mix ratio of mortar is likewise critical. When the pipe size is less than 150m, use 1:2 concrete mortar (1 part cement/2 parts mortar); When the length of the pipe is higher than 150m, a 1:1 cement mortar (1 part cement/1 part mortar) is made use of, as well as too little cement can additionally create pipe blockage.
7. Pipe clog triggered by temperature changes
In summer, when the temperature level is high as well as the pipeline is exposed to strong sunlight, the concrete is prone to dehydration, causing pipeline blockage. Therefore, damp straw bags or various other cooling down products ought to be covered on the pipeline. In winter months, insulation measures must be taken to ensure the temperature level of the concrete.
The above are several usual reasons and also preventive measures for pipe clog. In the real manufacturing process, due to the modifications of outside conditions, the reasons for pipe blockage are commonly greater than these. Yet as long as we strictly comply with the operating procedures, stop tiny problems, and regularly sum up the experience and also lessons from each pipeline clog, we will certainly be able to lessen the possibility of pipeline obstruction.
