Dust-reducing spray head device for spraying concrete

Abstract

The invention relates to the technical field of concrete, and discloses a dust-reducing spray head device for spraying concrete. The dust-reducing spray head device comprises a device body; a feedingport is fixedly formed in the top end of the device body; the lower part of the feeding port is movably connected with a feeding channel; a magnetic column is fixedly installed on the outer side of the feeding channel; an electromagnetic strip is fixedly installed in the magnetic column; a supporting column is fixedly installed in the device body; a filter layer is fixedly connected to the inner side of the supporting column; a filter screen magnet is fixedly installed in the filter layer; and a back suction fan is fixedly installed in the device body. According to the dust-reducing spray headdevice for spraying the concrete, a long electromagnetic strip and resistance wire are arranged on the outer side of a spray head pipeline to generate electromagnetism, dust in the concrete passing through the spray head pipeline is finally adsorbed, the concrete is finally sprayed out of a spray head outlet, and the purpose of reducing the dust in the concrete is achieved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a sprinkler device for spraying concrete that reduces dust. Background technique [0002] Concrete is one of the most important civil engineering materials today. Concrete has the characteristics of rich raw materials, low price and simple production process, so its consumption is increasing. At the same time, concrete also has the characteristics of high compressive strength, good durability, and a wide range of strength grades. These characteristics make it widely used, not only in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal engineering, etc. Concrete is also an important material. [0003] The use of shotcrete protection for the excavation surface is a common method for underground projects such as tunnels, subways, and civil air defenses. Shotcrete can be divided into dry spraying and wet spraying. Dry spraying i...

AI Technical Summary

Problems solved by technology

Dry spraying is to mix cement, sand, gravel and powder quick-setting agent first, and then use compressed air to transport it to the underground working surface through pipelines, and mix it with mixing water near the spray outlet, and then spray it on the excavation surface; When the dry spraying process is used, the dry material and the mixing water meet near the nozzle, but it is difficult to mix evenly. The sprayed concrete is mixed with a certain amount of dry powder. The homogeneity of the sprayed concrete is not high, and there are many internal macroscopic defects.

At the same time, the air pressure inside the pipe is as high as 5-6MPa, while the air pressure outside the pipe mouth is only 0.1MPa. The instantaneous air pressure at the pipe mouth drops, and the air mixed with dry powder and water vapor expands rapidly, resulting in a large amount of dust near the sprayed concrete work surface, and the construction environment is extremely harsh. Seriously affect the health of workers

Images