Concrete sprayer with pneumatic conveyer

Abstract

The invention discloses a concrete injection machine with an airflow conveying device, integrating a mixing device, a feeding device and a material outlet device into a whole, in particular relates to the concrete injection machine uses an airflow conveying principle, utilizes the compressed air to convey the material from the soft pipe to the nozzle in the form of rarefied flow and directly injects the material. When in specific work, the concrete mixed in the material box enters a material feeding pipe under the action of a material falling cylinder and a vibration mechanism; subsequently, the concrete suspended in the material feeding pipe is quickly and sufficiently mixed with liquid accelerated agent at the nozzle of the injection pipe by the airflow power conveying action of the compressed air and is then injected out of the nozzle at high speed. The concrete injection machine has novel design, compact structure, good working effect, long service life, and wide market prospect in the fields such as hydropower engineering, underground tunnel, culverts, subway engineering and coal moor mine tunnels, and the like.

Description

Concrete spraying machine with air flow conveying device Technical field The invention relates to a concrete spraying machine in engineering machinery equipment, in particular to a concrete spraying machine with an air conveying device. Background technique The concrete spraying machine is widely used in the sprayed concrete reinforcement construction work of hydropower projects, underground tunnels, culverts, subway projects and coal mines and mines. At present, there are about six types of concrete sprayers at home and abroad: pumping type, screw type, drum type, squeeze hose type and rotor type. Today, rotor-type products are the most widely used. Domestic products include: Pz5 dry spraying machine, HPc6 wet spraying machine; foreign products: Japan Furukawa dry spraying machine, Swiss Aliva wet spraying machine. There are some shortcomings in the use of rotor type concrete spraying machines that are commonly used in the market: the plane gap seal has obvious defects, the ...

AI Technical Summary

Problems solved by technology

The rotor type concrete spraying machines commonly used in the market have some shortcomings in use: the plane gap seal has obvious defects, the rotor type spraying machine is a constant pressure forced friction seal, the seal is unreliable, and the seals are replaced frequently , high energy consumption, large dust, high operating cost, short service life, the service life of the friction plate is only 50-70 hours, the intermittent feeding device is adopted, the material box is large, the actual spraying operation is heavy, and the work efficiency is low

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