Do you understand the principle of wet concrete shotcrete truck pumping?
What are the pumping principles of the truck mounted shotcrete machine? How does the concrete delivery pump carry out the pumping of concrete? Based on long-term repeated tests and customer research, Saintyol DAWIN Machinery believes that there are many factors that affect the material absorption of the agitator pump pumping system, which are independent of each other and affect each other, mainly including the angle between the delivery cylinder and the horizontal plane, and the reversing frequency of the main hydraulic cylinder. , the angle between the mixing blade and the base, and the structure of the inner cavity of the hopper, etc.
The test conditions and test methods are as follows: (1) All tests are carried out under the condition that the basic conditions such as concrete slump and label remain unchanged, and the construction site is the floor of the building. (2) Select a vehicle-mounted pump for test and test. The inclination angle of the conveying cylinder (the angle between the conveying cylinder and the horizontal plane) was changed by adjusting the height of the outrigger at the hopper end of the pump on the wet concrete spray machine, and the material absorption at different angles was obtained through experiments. The test found that raising the hopper end to increase the inclination angle (positive angle) of the conveying cylinder, the change of material absorption is more obvious, and the more the positive angle increases, the better the material absorption. By changing the displacement of the conveying cylinder, it is found that when the displacement is 70% compared with 100% displacement, the improvement of material absorption is particularly obvious when the positive angle is appropriately increased, and the average suction efficiency (material absorption) reaches 93.2 at a large angle of 6.3° %, while only 85.8% at the horizontal angle.
Adjust the reversing frequency of the main hydraulic cylinder, and calculate the average reversing frequency by recording the total reversing times and time of pumping 100 Ill3 concrete. This test mainly tests the material absorption when the working condition (reversing frequency) is 21-27 times/min, because this working condition is a common working condition. Change the welding angle between the mixing blade and the base of the stirring drag pump, and make 150, 20, 300, 400 and 50 respectively. From the test results, it can be seen that when the installation angle of the mixing blade of the mixing drag pump is 30°, the suction efficiency of the pumping system is high, reaching more than 92%, which is nearly 80.96% higher than that when the installation angle of the mixing blade is 50° %, which greatly improves the work efficiency and economy of the entire concrete equipment.
The truck mounted concrete spray machine plays an important role in the construction according to the above pumping principle, and the wet spray trolley plays a decisive role in the construction of new countryside. Qingke Heavy Industry is committed to the R & D and production of concrete equipment, and the after-sales service is guaranteed, which is worthy of your trust. According to the test results, by changing the overall connection mode of the conveying cylinder of the wet spray trolley, the hopper end is raised by about 180 mm, and the angle between the conveying cylinder and the horizontal plane is controlled to be about 4°; Adjust the 20° to 30°, and add pressure relief holes on the blades to ensure sufficient feeding.