The design of the mixing drum and mixing blade of the small concrete mixer generally adopts clockwise rotation as the feeding and mixing, and counterclockwise rotation as the discharging. The rotation speed of the mixing drum is fast during feeding, in order to save working time; the rotation speed of the mixing drum is slow during mixing, in order to reduce excessive evaporation of water and segregation. Let's follow Xiaobian to learn more.
However, in the process of transportation, the mixing drum must be operated at a constant speed to prevent the concrete from solidifying and deteriorating. During the rotation of the barrel, the concrete is continuously pushed to the front of the mixing barrel by the blades, and the concrete reaching the front end is bound to be pushed back by the end wall of the mixing barrel, so that the concrete rolls back and forth;
The continuous rotation of the two blades drives the continuous rotation of the concrete, and the concrete at the same position changes continuously through this movement, thus playing a mixing role; In addition, the change of the blade shape curve can make the concrete form a small circular movement between its root and the cylinder wall, which also plays a certain role in mixing concrete.
When the concrete is transported to the work site, the mixing drum will rotate counterclockwise, and the rotation direction of the blade is also opposite. The concrete will be guided by the blade to move to the mixing drum mouth until it is discharged from the drum mouth.
In the past, in the installation process of spiral blades, concrete tank manufacturers did not use optimization technology. They did not spray powder on the plate first, draw lines, then cut the roll circle, and then install along the spiral blade generatrix formed on the tank body. Instead, they welded and installed it completely based on the production experience of workers, resulting in unreasonable spiral blades with spiral lines as generatrix after installation, resulting in poor dimensional accuracy of the tank body, Thus affecting the feeding and discharging speed and making the discharging rate low.
Now, by parameterizing and optimizing the spiral of the tank body, the blank can be optimized, and the material can be accurately cut by numerical control. The cone rolling forming of the tank body is completed by the cone rolling die, and then the welding of the whole tank body and the blades is completed by CO2 gas shielded welding to complete the formation of the tank body.
The inspection and experiment of the tank formed after the optimized process show that the dimensional accuracy of the tank is significantly improved and meets the requirements, and the discharge rate of the tank is also significantly improved, which meets the national standard.
That's all for you to know about the spiral blade of the mixing drum of the mixing truck. If you have any questions you don't understand, you can come to our website at any time consulting service