A concrete mixer includes a power mechanism connected to a transmission mechanism

A concrete mixer includes a power mechanism connected to a transmission mechanism through a shaft and a drum driven by the transmission mechanism. A gear ring is installed around the drum body on the drum body, and a gear that meshes with the gear ring is installed on the transmission shaft. The structure of this utility model is simple and reasonable. After meshing with gears and ring gears, it can effectively overcome the slipping phenomenon between the supporting wheel and the mixer drum during rainy and foggy weather; The adopted transmission mechanism can further ensure the elimination of slippage between the idler and the mixer drum

According to the nature of the work, it can be divided into intermittent (batch) and continuous types; According to the mixing principle, it can be divided into self falling and forced types; According to the installation method, it can be divided into fixed and mobile types; Divided into tipping type and non tipping type according to the discharge method; According to the structure of the mixing drum, it can be divided into pear type, drum type, double cone, disc vertical shaft type, and circular groove horizontal shaft type.

1. Classified by job nature:

(1) Periodic working mixer;

(2) Continuous working mixer.

2. According to the mixing principle:

(1) Self falling mixer;

(2) Forced mixer.

3. According to the shape of the mixing bucket:

(1) Drum type;

(2) Cone shaped;

(3) Disc style.

In addition, mixers are also divided into split tube and circular groove (i.e. horizontal shaft) mixers.

Self dumping mixers have a long history. As early as the early 20th century, drum concrete mixers driven by steam engines began to appear. After the 1950s, double cone mixers with reverse discharge and tilting discharge, as well as split drum mixers, were successively introduced and developed. There are radially arranged mixing blades on the inner wall of the mixing drum of the self falling concrete mixer. When working, the mixing drum rotates around its horizontal axis, and the material added to the mixing drum is lifted to a certain height by the blades and then falls by its own weight. This repetitive movement achieves the effect of uniform mixing. The structure of a self dumping concrete mixer is simple, generally focusing on mixing plastic concrete.

After the rise of forced mixers in the early 1950s, they have experienced rapid development and promotion. The first to appear was the circular vertical shaft forced concrete mixer. This type of mixer is divided into two types: turboprop and planetary. After the 1870s, with the application of lightweight aggregates, circular groove horizontal shaft forced mixers emerged, which were divided into single horizontal shaft and double horizontal shaft types, and had the characteristics of both self falling and forced mixing. Its stirring blades have a low linear velocity, good wear resistance, and low energy consumption, and have developed rapidly. The rotating arm in the mixing drum of a forced concrete mixer is equipped with mixing blades. The materials added to the mixing drum are vigorously stirred by the mixing blades, forming a cross flow. This mixing method is much more effective than the self falling mixing method and is mainly suitable for mixing dry and hard concrete.

The continuous concrete mixer is equipped with spiral mixing blades, and various materials are weighed continuously according to the mix proportion before being fed into the mixer. The mixed concrete is continuously discharged outward from the discharge end. This type of mixer has a short mixing time, high productivity, and its development is remarkable.

With the development of concrete materials and construction techniques, many new types of concrete mixers have emerged, such as steam heated mixers, supercritical speed mixers, sonic mixers, swing disc mixers without mixing blades, and secondary mixing concrete mixers.