The concrete mixer is a machine which mixes cement and sand aggregate and water into concrete mixture, mainly composed of mixing cylinder, feeding and discharging mechanism, water supply system, prime mover, transmission mechanism, frame and supporting device The
Building concrete concrete mixer is a certain mix of water, sand, aggregate and cement and other raw materials mixed with homogeneous concrete machinery. The mixer has the advantages of high productivity, Concrete Mixer good mixing quality and so on. The earliest appeared in the early 20th century is the self-falling mixer, 50 years after the different discharge methods for the characteristics of the mixer and different ways of mixing the mixer have come out.
Principle and Classification of Concrete Mixer
From the 1950s onwards, the beginning of the disc is a forced concrete mixer. After the nineteen seventies, with the emergence of new aggregates, there has been a new type of forced mixer, to achieve a blender at the same time both from the fall and forced two functions. Concrete Mixer The stirring blade has the characteristics of small speed, high wear resistance and low energy consumption. This kind of new mixer mixer has stirring blades and stirring, and the cement in the mixing cylinder is formed with homogeneous cement mixture with coarse aggregate under the stirring of the stirring blade. This mixing method is far more than the effect of stirring from the use of intense, tight enough to stir dry hard concrete. The continuous concrete mixer is equipped with helical stirring blades. All kinds of materials are continuously weighed and fed into the mixer according to the common ratio. The mixed concrete is discharged continuously from the discharge end. This mixer has a short mixing time, high productivity, Concrete Mixer and its growth is noticeable.
The structural characteristics of concrete mixer,
(A), double cone reversing the material mixer
The biggest feature of this mixer is the direction of mixing and the opposite direction of the material, suitable for mixing plastic and semi-dry concrete and large aggregate concrete; not suitable for poor mobility, dry hard concrete. Because of the economy of this mixer is better, Concrete Mixer the quality and effect of mixing is easy to control, so the scope of application is more extensive, can be used in most of the construction projects, can also be used in roads, bridges, can also be used to produce various Class concrete components. Concrete Mixer The machine has two kinds of transmission, one is the gear drive; the other is the friction drive.
(B), double horizontal shaft concrete mixer
This mixer is a kind of forced mixer, its main feature is the structure is very compact, by the drive system, mixing tank, mixer, shaft seal and other parts of the composition. Concrete Mixer This mixer is mainly used for mixing low-mobility dry hard concrete, semi-dry rigid concrete, lightweight aggregate concrete and a variety of mortar.
(C), single horizontal shaft concrete mixer
This kind of mixer is also a kind of forced mixer. The structure of the mixer is characterized by symmetrical arrangement of two rotating ribbon blades on both sides of the agitating arm, except that the rotation of the two helical blades is reversed, and during the mixing of the two blades The mixture was pushed from both ends into the middle of the agitator. In the course of mixing the spiral blade rotation direction for a while to the left for a while to the right, so in the rotation to bring the mixture movement, Concrete Mixer forced mixing material for extrusion, cutting, rubbing, stirring effect is very obvious.
(D), vertical axis planetary mixer
This type of mixer is mainly used for the production of roller compacted concrete, block and prefabricated production, can also be used to produce steel fiber concrete, colored concrete, dry mortar. Concrete Mixer Its advantage lies in the fine aggregate mixing effect is superior, stirring strength. Its structure is mainly in two forms, one is fixed axis; the other is fixed plate type. This kind of mechanical stirring blade is fixed on the moving plate and the planetary frame, fixed on the moving plate to achieve the mixing function of the blade, Concrete Mixer fixed on the planet carrier to achieve the function of chaos.
Third, the performance of concrete mixer design
In the concrete design, we should be based on the new mixing concept, scientific and rational optimization design, select the best geometry, working parameters, making the mixing process in the shortest possible time to play the best results to ensure the efficient completion of mixing to get the most Excellent mixing quality.
(A), the mixer started when the mechanical design focus
(2) In a stirring cycle, the mixer power consumption has two minimum values. (2) In a stirring cycle, the mixer power consumption has two minimum values. (2) In the mixing cycle, the mixer power consumption has two minimum And the two maximum values, the first minimum occurs at the position of 30 ° and the second minimum occurs at 210 °; Concrete Mixer the position of the first maximum occurs at the position of 120 ° and the maximum (3) When the load of the concrete mixer is started, the time of the beginning of the cycle is shortened, the stirring force is reduced and the stirring speed is increased. After 5 cycles, the mixer tends to be stable.
(B), ingredients and feeding system
Ingredients is a way to complete the ingredients in the bunker, metering, and then raised to the middle storage hopper, another way through the lifting device, the first to complete the upgrade, and then classified storage, the habit of the front of a station called, behind the Called floor Floor is characterized by equipment to start production fast, high efficiency, the disadvantage is high cost. Concrete Mixer Aggregate lifting device is divided into bucket lift and belt lifting. Bucket upgrade is generally used for small mixing equipment, which is characterized by small footprint, simple structure, the shortcomings of the failure rate is high; belt upgrade according to the venue and angle, sub-slot belt, cheek belt and smooth belt several, Concrete Mixer Glossy belt generally consider the feeding angle of not more than 20 degrees, or easy to roll material, slot belt angle, small footprint, but easy to sticky fabric, resulting in serious material sprinkling. So the mixed station are generally used smooth belt. Powder is mostly powder jar, through the spiral measurement. Liquid through the pipeline to the measurement said to complete the measurement
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