Nozzle structure for concrete pulp shooting machine

Abstract

The invention discloses a nozzle structure for a concrete pulp shooting machine. The nozzle structure comprises a shell with a slurry flow channel inside. The slurry flow channel in the shell is divided into a slurry inlet section, an assisting section and a slurry spraying section in the in-out flowing direction. At least one impeller mechanism is arranged in the assisting section. The impeller mechanism is driven by external force to enable blades to rotate in the direction from the slurry inlet section to the slurry spraying section. According to the nozzle structure, by means of rotation of the impeller mechanism, concrete slurry entering the slurry inlet section is stirred and pushed by centrifugal force to be ejected to the slurry spraying section to achieve large-range slurry spraying, and most of the concrete slurry ejected by the nozzle structure can effectively enter a target. It is clear that the nozzle structure can reduce material waste, meanwhile, the concrete spraying solidification efficiency can be improved, the quality of the solidified concrete can be improved, and the application prospect is good.

Description

technical field [0001] The invention relates to a concrete spraying machine for concrete spraying construction, in particular to a nozzle structure for the concrete spraying machine. Background technique [0002] Concrete spraying construction is to spray concrete slurry (including cement slurry and sand and gravel, etc.) onto the target target - steel grid frame, wall or rock wall through the collection and guidance of nozzles to achieve solidification. Concrete spraying construction operations have been widely used in concrete construction such as engineering buildings, mines, tunnels, culverts, subways, and hydropower projects. [0003] According to the operating characteristics of concrete spraying construction, the nozzle is one of the key components of the concrete spraying machine, which affects whether the concrete slurry can be effectively sprayed on the target. [0004] At present, the nozzles used for concrete spraying machines only have a single collection and g...

AI Technical Summary

Problems solved by technology

[0004] At present, the nozzles used for concrete spraying machines only have a single collection and guiding function, and cannot push the concrete slurry sprayed out by them, resulting in a short range of the concrete slurry sprayed out by them, especially the A large number of fine stones in the material will fall to the area outside the target due to the action of gravity. After testing, the falling fine stones are about 30% of the total amount of sand and stones in the concrete slurry

Such a construction situation will not only cause waste of construction materials, but also affect the efficiency and compressive strength of the shotcrete curing, and the concrete slurry sprayed on the target target will cause the cured concrete The quality is difficult to be effectively guaranteed

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