Concrete mixing station is a commonly used mixing equipment in current engineering projects.

The host machine used in the concrete mixing station must meet the characteristics of wide application range, strong mixing strength, high production efficiency, high degree of automation, and high safety factor. At this point, the traditional drum mixer is obviously unable to meet the increasingly higher standards and requirements. In the past, the drum mixer relied on human power to feed materials and the rotation of the drum to drive the material to rotate and mix. This production method relied entirely on rotational mixing. The material mixing uniformity was poor and the scope of application was quite narrow. Not to mention its slow production speed, but from a safety perspective alone, the drum mixer was not suitable for the mixing station.

The intermittent concrete mixing station is a commonly used mixing equipment in current engineering projects. So what are the characteristics of the intermittent concrete mixing station? Let’s take a look.

1. The forced mixing host and batching machine are controlled by computers and frequency converters to achieve soft start and stop, small impact, and less belt sticking. All kinds of aggregates are discharged, mixed, and lifted with uniform load within a basically fixed time.

2. The large discharge port of the concrete batching machine allows for fast discharging speed and short feeding time. One feeding can produce one truck of concrete. The cylinder action frequency is small and the service life is long. The amount of material added from the storage bin to the metering hopper does not affect the batching accuracy.

3. The feeding amount of the storage hopper of the batching machine and the weighing of ingredients can be carried out at the same time. The feeding time from the storage silo to the weighing hopper is short, but the batching time and lifting time are long. As a result, the sensor has sufficient stable response time, small batching overshoot, and small lifting load.

4. The entire set of intermittent concrete mixing stations adopts frequency converter speed regulation, which can achieve high-precision batching in a short period of time and fully automated operation, greatly improving work efficiency.

After careful operation by the staff, the position deviation of the pilot hole can be better controlled. However, due to the special construction technology of the drag pipe, the position of the borehole may be changed during the subsequent back-expanding operation. In order to reduce the deviation, different back-expanders can be used for different strata. Scraper re-expanders are used for soft soil layers, cylindrical re-expanders are used for mixed soils, and inlaid alloy steel cone re-expanders are used for rock layers. The type of re-expander and geological conditions directly affect the re-expansion speed. Using a re-expander that matches the formation and appropriate drilling fluid flow is the key to back-expansion construction, and it is also an effective means to maintain the stability of the hole wall and prevent hole collapse.