Dust removal type concrete spraying machine

Abstract

The invention belongs to the technical field of mining machinery application, and particularly relates to a dust removal type concrete spraying machine. The machine comprises a chassis, walking wheels installed on the lower portion of the chassis, a concrete spraying machine body, an automatic accelerator adding mechanism and a dust removal device. The concrete spraying machine body comprises a speed reducer and a rotor body assembly connected with an output shaft of the speed reducer. One side of the concrete spraying machine body is provided with a dust discharge mechanism. The dust discharge mechanism comprises an upper air overflowing opening, an air outlet and a lower air overflowing opening which are communicated with a vertically-arranged air exhaust pipe at the same time. The air exhaust pipe is connected with the dust removal device. By the adoption of the dust removal type concrete spraying machine, working dust produced by a dry spraying type concrete spraying machine can be removed, and environmental pollution and harm caused to the bodies of workers are avoided.

Description

technical field [0001] The invention belongs to the technical field of mining machinery application, and in particular relates to a dust-removing concrete sprayer. Background technique [0002] With the increase of various pollution and harmful emissions, the control of air pollution has become an important issue in social development, and the concrete spray support process is also one of the pollution sources that cause air pollution. After decades of development, the concrete shotcrete support technology has been widely used in rock roadway support in building foundation pits, subways, slope protection, expressways, high-speed rail tunnels and mining projects. At present, the concrete support technology has been developed into two methods: dry spraying and wet spraying. The concrete wet spraying process basically has no dust emission, and has little impact on the environment and human body. However, because the wet spraying process is complicated, the transportation dista...

AI Technical Summary

Problems solved by technology

When the dry-sprayed concrete jetting machine is working, it mixes the cement and aggregates in proportion. After entering the jetting machine, the air is used to constrain the material through the nozzle, and it is pushed to the sprayed working surface at high speed, and the mixing water passes through the nozzle. The ring will be added, and its main structure includes chassis, walking wheels, rotor concrete sprayer body and nozzle device. The rotor concrete sprayer body mainly includes hopper, hopper seat, reducer and rotor body assembly. There are upper and lower overflow ports on the body of the machine, and the concrete material is easily discharged into the air from the upper and lower overflow ports; when the friction plate of the rotor body is worn, a lot of shotcrete raw materials will leak out from its circumference, and the friction plate will cause it to flow into the hopper. Against the wind, it impacts the spraying raw materials in the hopper, causing the spraying to form dust and discharge; when dry spraying, it is necessary to add water to the nozzle, because the water in the current nozzle structure is not fully mixed with cement and sand and gravel, which also leads to spraying from the outlet of the nozzle during spraying. A large amount of dust is generated, and a large amount of mixed material rebounds, which is easy to cause a great waste of materials into the air, etc.

All of the above factors lead to a large amount of cement dust being discharged into the air, seriously polluting the working environment, which not only endangers the health of on-site workers, but also further releases into the atmosphere, increasing the pollution of the atmosphere, and the cement dust is even more harmful to people. , long-term inhalation will cause severe silicosis and other serious occupational diseases, which cannot be cured

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