A concrete spraying device for material mixing, extrusion and spraying at the same time

Abstract

The invention relates to the technical field of 3D printing equipment, and provides a concrete spraying device for material stirring, extrusion and spraying at the same time. a shaft, a hollow transmission shaft and a spray pipe; the dry powder homogenizing device is communicated with the powder-liquid stirring pipe; the powder-liquid stirring pipe is provided with a hollow extruding shaft and a hollow transmission shaft that are connected by transmission; a stirring pipe is arranged on the hollow extruding shaft Blade group; the hollow drive shaft is connected to the main drive motor in a drive, a conveying roller is arranged on the hollow drive shaft, a liquid stirring pipe is protruded from the tail of the hollow drive shaft, and a water inlet integrated block is set at the tail of the hollow drive shaft , the tail of the hollow transmission shaft is provided with a water hole matched with the water inlet integrated block; the head of the hollow transmission shaft is not sealed with the hollow extrusion shaft. The invention can realize the simultaneous completion of mixing, extrusion and spraying, adapt to the spraying of fast-setting concrete materials, and improve production efficiency.

Description

technical field [0001] The present invention relates to the technical field of 3D printing equipment, in particular to a concrete spraying device which performs material stirring, extrusion and spraying at the same time. Background technique [0002] In 3D printing technology, jetting process is commonly used, and jetting methods are divided into dry jetting, wet jetting, and wet jetting. The spraying speed of dry spraying is large, dust pollution and rebound are more serious, and the use is limited. The wet spraying machine has lower dust concentration and lower rebound rate than the dry spraying machine. The spraying speed of wet spraying is lower, due to the water-cement ratio. If it increases, the initial strength of concrete is also lower, but the rebound situation is improved, the material combination is easy to control, and the work efficiency is higher than that of the dry mixing method. Wet spraying should be preferred for shotcrete. [0003] The first introduced ...

AI Technical Summary

Problems solved by technology

Mixing and transporting the slurry requires time-consuming and additional equipment, and adding a retarder to avoid rapid setting not only increases the production cost, but also limits the use effect of special performance concrete (such as magnesium phosphate cement, etc.)

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