Planetary concrete mixer

Abstract

The invention discloses a planetary concrete mixer, which comprises a lower barrel body and a plurality of helical ribbon mixing devices, wherein a middle barrel body is connected to the upper part of the lower barrel body; a planetary gear mechanism is arranged in the middle barrel body; a cover plate is arranged at the upper end of the middle barrel body; a mixing drive device is arranged on the cover plate; a mixing input shaft is rotationally connected in the middle of the cover plate; the planetary gear mechanism comprises planetary racks, sun wheels and a plurality of planetary wheels; the planetary racks are connected to the lower end of the mixing input shaft; the sun wheels are sleeved on the mixing input shaft; the upper ends of the sun wheels are connected with the middle barrel body; planetary wheel shafts are arranged on the planetary racks; the planetary wheels are mounted on the planetary wheel shafts; each helical ribbon mixing device comprises two mixing arms; mixing helical ribbons are connected on the inner side surfaces of the two mixing arms; the upper parts of the two mixing arms are connected through a connecting plate; the lower ends of the planetary wheel shafts are connected with the connecting plates; and a vibration mechanism is arranged in the lower barrel body. According to the planetary concrete mixer, the microcosmic uniformity of concrete can be effectively improved.

Description

technical field [0001] The invention relates to a concrete mixer, in particular to a planetary concrete mixer. Background technique [0002] Concrete mixer is a special machine for mixing concrete batch materials evenly to make plastic concrete mixture. It is widely used in construction projects and commercial concrete factories. It is an essential machine for engineering construction. Its performance directly affects all The quality and efficiency of mixing concrete. In the prior art, the vane structure of the ordinary vertical shaft planetary mixer is relatively complicated, the mixing wear is large, and there is a strict limit on the particle size of the aggregate. It can generally make the mixed concrete macroscopically uniform in a short period of time, but if the cement slurry in the macroscopically homogeneous concrete after mixing is observed under a microscope, it will be found that the cement particles are not evenly dispersed in the water. , 10% to 30% of cement...

AI Technical Summary

Problems solved by technology

In the prior art, the blade structure of the ordinary vertical shaft planetary mixer is relatively complicated, the mixing wear is large, and there are strict restrictions on the particle size of the aggregate

It can generally make the mixed concrete macroscopically uniform in a short period of time, but if the cement slurry in the macroscopically homogeneous concrete after mixing is observed under a microscope, it will be found that the cement particles are not evenly dispersed in the water. , 10% to 30% of the cement particles gather together in twos and threes to form tiny cement clusters, which affect the workability, strength and durability of concrete.

In recent years, some solutions to this problem have been proposed at home and abroad. For example, many people have studied the design and arrangement of mixing blades, so as to improve the microscopic uniformity of concrete through repeated mixing without dead zones, but the results have not been proved by experiments. not obvious

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