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

technical field [0001] The invention relates to a concrete spraying machine in engineering mechanical equipment, in particular to a concrete spraying machine with an air flow conveying device. Background technique [0002] Concrete spraying machines are widely used in hydropower projects, underground tunnels, culverts, subway projects and coal mine high marsh mine roadway shotcrete reinforcement construction operations. [0003] At present, there are about six types of concrete sprayers at home and abroad: pumping type, screw type, drum type, extruded hose type and rotor type. Rotor-type products are the most widely used today. Domestic products include: Pz5 type dry spraying machine, HPc6 type wet spraying machine; foreign products include: Japanese Furukawa dry spraying machine, Swiss Aliva wet spraying machine. [0004] 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 ty...

AI Technical Summary

Problems solved by technology

[0004] 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, intermittent feeding device is adopted, the volume of the material box is large, the actual spraying operation workload is large, and the work efficiency is low

Images