The machine is composed of a base, a transmission group and a mixing cylinder, the base is used to fix the transmission group, the transmission group drives the mixing cylinder to rotate, the mixing sheet is provided with a plurality of first mixing pieces and a plurality of first mixing pieces, one side of the first mixing piece is arranged around the inner wall of the mixing cylinder, and the rotation direction of the second mixing piece, and the number of rotation drops is not the same. The utility model enables a plurality of raw materials to slide on the first mixing sheet and the second mixing sheet to avoid destroying the grain of the raw materials during mixing, and generates a small vortex to roll up the materials and evenly mix the mixed materials by taking advantage of the different rotation directions of the two mixing sheets and the different number of rotation cycles.
Concrete mixer is a more common mixer, concrete mixer according to the working principle, can be divided into two categories: self-fall and forced type.
(1) Self-falling concrete mixer is suitable for mixing plastic concrete.
(2) The mixing effect of the forced mixer is stronger than that of the self-falling mixer, and the dry hard concrete and light aggregate mixed soil are directly mixed. Taking the forced mixer as an example, the principle and improvement direction of the mixer are expounded.
Practical significance of concrete mixer
Kunset soil mixer is a special machine for preparing concrete by mixing concrete mixture according to a certain mix ratio of cement, sand, gravel (aggregate) and water. The society generally believes that the main role of the concrete mixer is: to make the filler evenly distributed, so that it is fully mixed, destroy the cement "bunching" phenomenon and make the cement on the surface of the aggregate surface fully wrapped, ready for full mixing: continue to stir to promote the cement particles and its coarse aggregate fully combined to form the ideal cement mixture once the water is too much to encapsulate the coarse aggregate, It is not conducive to the adhesion of cement powder, and the mixing of the mixer can split the adhesion effect of the bad water film, so as to achieve the purpose of homogenization of the cement mixture.
2, the principle and classification of concrete mixer
Self-falling mixer first appeared in the early 20th century, the earliest drum concrete mixer is driven by steam engine 50 years later, different discharge methods for the characteristics of the mixer and different feeding methods of the mixer have come out of the self-falling mixer refers to the mixing blade fixed on the inner wall of the mixing cylinder, when the mixing cylinder horizontal rotation, The mixing blade will stir the mixture in the simplified part under the action of its own weight, so that the cyclic activity reaches the result of symmetrical mixing. The layout of the self-falling concrete mixer is simple, and it is usually based on mixing plastic concrete.
The forced concrete mixer is based on the rotation of the mixing shaft in the horizontal position of the mixing drum and the connected mixing arm, which produces complex movements such as extrusion, shear, impact and circumferent axial free fall on the mixing material
After bulking up from the early 1950s, the rapid growth and promotion began to appear is the disc forced concrete mixer. After the 1870s, with the emergence of new aggregates, there was a new type of forcing mixer, which realized a mixer with both self-fall and forcing functions. The mixing blade has the characteristics of small speed, high wear resistance and low energy consumption. The mixing blade is present in the mixing drum and participates in mixing. The cement in the mixing drum forms a homogeneous cement mixture with coarse and fine aggregates under the stirring of the mixing blade. The continuous concrete mixing is equipped with spiral mixing blades, and all kinds of materials are continuously weighed and sent to the mixer according to the common ratio, and the mixed soil is continuously discharged from the discharge end. The mixing time of the mixer is short, the productivity is high, and its growth is eye-catching.
With the growth of concrete materials and construction technology, there have been many new layout of concrete mixers. Such as steam heating mixer, supercritical speed mixer, acoustic mixer. The rocking tray mixer without mixing blade and the concrete mixer with secondary mixing etc.
3 Mixer use safety precautions
The driver of the concrete mixer must be familiar with the performance and operation method of the operating machinery, and should wear labor protection articles in accordance with the regulations when working. Before work, check whether the transmission clutch and brake are flexible and reliable, whether the climbing bucket wire rope is broken, the mixer gear, pulley and other transmission parts of the protection is intact, the motor grounding is good, confirm the error before work, if there is a fault can not continue to move should immediately cut off the power supply. Remove the concrete from the mixing drum and then repair it. The concrete mixer shall implement two level leakage protection. The driver is not allowed to leave the work post during the mechanical operation. It is forbidden to use iron, spade or any other object to extend into the mixing cylinder when the mixer is running. No one is allowed to pass or stay under the hopper when it is raised. If it is necessary to repair under the bucket, stop the car and cut off the power supply, and use the safety chain link letter or cushion the sleeper before carrying out. It is strictly forbidden to put the operator's head into the hopper and the frame to check the feeding situation during the feeding operation. Always pay attention to whether the parts of the concrete mixer operate normally. If it is necessary to enter the mixing cylinder for cleaning, the power supply should be disconnected, the fuse should be removed, and the switch box should be locked, or the person should take care of it.
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