How to choose the right suitable Injection Pump?
In the choice of professional Injection Pump, we must go through thousands of selection, because this machine is used on the site, if you buy low-quality machine will not only affect the progress of the project, the situation will cause serious accidents, personal safety Not a good guarantee. Therefore, in order to the safety of construction workers, buyers buy mineral cement grouting machine must be a thousand choice.
The first project is the need to lay the foundation of the most basic, if the most basic projects are Maji sohra, then this project is doomed to failure, whether it is engaged in construction or bridge pavement should be the most basic grouting task to do excellence. Consumers at the time of purchase, do not only pay attention to the price, to carefully understand the machine's own performance. The performance of the machine is good quality, in the grouting task can not be sloppy.
The pump can only ensure that the quality of its grouting, if the flow is unstable, indicating that you use the Injection Pump has been in a sub-health state, then have to stop the inspection, on the Need to do what check, I think that is mainly about a few aspects.
1, check the voltage is stable, if the voltage is not stable with the proposed regulator, inverter and other equipment to prevent the motor;
2, check the Injection Pump flow path is smooth, whether there is damage, blocking the occurrence of the phenomenon;
3, check the nozzle and outlet connection is consistent, whether there is a lot of leakage slurry phenomenon;
4, check the pump impeller wear phenomenon, if the wear should be replaced immediately.
Finally, the need to remind everyone that the occasional flow of the pump when the flow of instability is a normal cause, but once there is a big fluctuation you have to stop doing the check, otherwise it will cause devastating damage to the pump!
High-pressure Injection Pump equipment should be compatible with the geological conditions of the formation of the formation, in the complex formation, should take full account of the high-speed trolley's ability to turn and enhance the capacity, and appropriate leave; high pressure Injection Pump equipment selection should be with the construction depth Adaptation. Depth of the deep, you should choose high-power, towers and other trolley and the larger pressure of the pump or pump; high pressure pump equipment should be compatible with the high spray process, single tube, double tube high spray process is relatively simple , 3 pipe, multi-tube process is relatively complex, and therefore equipment also requires a higher and ancillary equipment are not the same; high-pressure pump equipment should be designed with the wall (pile) type to match the construction of spray wall, Trolley with a swing device, the construction of jet grouting pile, it requires high-jet truck with a choice device; high-pressure Injection Pump in the conditions are available, should also be selected as far as possible with high degree of automatic, and measuring device equipment construction equipment.
The use of Injection Pump, the grouting media must be strict requirements, the use of the correct process, so as to ensure the successful grouting, on the Injection Pump on the grouting media and process requirements, the author gives the following views:
First, the pump on the grouting media requirements
1, the use of high quality portland cement for medium;
2, the sand or coarse sand fineness modulus should be greater than 2.5, the amount of mud should not be greater than 3%;
3, the use of water glass as a grouting medium, the media particle size should not be greater than 15mm;
4, the use of alkaline quick-setting agent, the media may not be doped with active silica;
5, the media can not contain too much impurities, water content control in 10% to 15%;
6, quick-setting agent of the initial setting time should not be greater than 5min, final setting time should not be greater than 10min.
Second, the pump on the process requirements
1, the pump before the work, first of all in the grouting site covered with old tape, in order to collect resilient material, the rebound rate requirements shall not exceed 15%;
2, the Injection Pump grouting sequence should be inside, the first on the next, the gun head and grouting surface as far as possible to keep vertical, spray gun head and spray surface of the vertical distance requirements 0.8M-1.0M;
3, Injection Pump grouting, grouting pressure of 0.4MPA, water pressure should be higher than the wind pressure 0.1MPA or so, add water with the experience of the shooter to control the water-cement ratio of 0.4-0.5;
4, Injection Pump grouting process, according to the changes in the material, timely adjustment of water supply to ensure that the water-cement ratio is accurate, requiring grouting medium without speckle, no flow, strong adhesion,
5, after the end of the grouting required to re-spray, re-spray interval of not more than 2 hours, or the application of high-pressure water to wash the surface;
6, after the end of grouting, rebound media requirements in a timely manner, and on duty spices with the net.