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Wet-type concrete spraying process

A technology of concrete spraying and crafting, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc. It can solve the problems of complex hydraulic system maintenance, inability to convey concrete, and short conveying distance, so as to improve the working environment and avoid occupational diseases. The effect of reducing the cost of additives

Inactive Publication Date: 2014-01-22
JIANGSU DINGJIA TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The screw pump structure and extrusion structure in the wet spraying machine are only suitable for conveying mortar without aggregates, and cannot transport concrete containing aggregates; the cylinder plunger type wet spraying machine has a large volume and is inconvenient to transport, and the hydraulic system Complicated to maintain and more expensive
The resistance of the rotor type concrete wet spraying machine is increased after the material is mixed with water, and the conveying distance is shorter

Method used

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  • Wet-type concrete spraying process

Examples

Experimental program
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Effect test

Embodiment

[0010] Equipment used: electric screw mixer, rotor concrete sprayer, pneumatic mixing mechanism and pneumatic slurry pump

[0011] Specific spraying method: one way: dry sand and powdery quick-setting agent are stirred by electric screw mixer 1, then sent to rotor concrete sprayer 2 and sent to spray gun 5; the other way: cement and water are mixed by pneumatic stirring mechanism 3 The cement slurry is transported to the spray gun 5 by the pneumatic slurry pump 4, mixed with sandstone and powdered quick-setting agent, and sprayed to the surface to be sprayed.

[0012] Such as figure 1 Shown, described stirring mechanism 1 for sandstone, quick-setting agent comprises any kind of stirring mechanism of any structural principle in manual, pneumatic, hydraulic, electric or other driving modes; The conveying mechanism 2 for quick-setting agent delivery includes any conveying mechanism of any structure in manual, pneumatic, hydraulic, electric or other driving modes; the cement and ...

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Abstract

The invention discloses a wet-type concrete spraying process and belongs to concrete spraying processes. According to the wet-type concrete spraying process, cement and gravel are conveyed to a spray gun respectively in two branches; after the gravel and a powdery accelerating agent are proportionally mixed and stirred through a stirring mechanism, one branch enters a conveying mechanism, and the gravel is conveyed to the spray gun; after the cement and water are proportionally mixed and stirred through a mixing and stirring mechanism, the other branch is conveyed to the spray gun through a grout conveying pump; after being mixed in the spray gun, the two branches are sprayed to a spray-receiving face through the spray gun. According to the technical scheme, the process can achieve the purposes of falling dust and being slight in springback, change the status quo that a liquid accelerating agent must be used in a traditional wet spraying process, reduce additive cost in wet spraying construction, and guarantee material conveying distances. The process can be widely applied to grout spraying construction in the various industries of coal mine, water and electricity, tunnels, municipal engineering and the like.

Description

technical field [0001] The invention relates to a concrete spraying process, in particular to a wet concrete spraying process. Background technique [0002] At present, concrete spraying machines at home and abroad are divided into dry spraying machines, tidal spraying machines and wet spraying machines. Due to the large dust, high rebound and poor spraying quality of dry spraying machines and tidal spraying machines during spraying operations, they are gradually replaced by wet spraying machines. machine replaced. The screw pump structure and extrusion structure in the wet spraying machine are only suitable for conveying mortar without aggregates, and cannot transport concrete containing aggregates; the cylinder plunger type wet spraying machine has a large volume and is inconvenient to transport, and the hydraulic system Maintenance is complicated and the price is higher. The resistance of the rotor type concrete wet spraying machine increases after the material is mixed...

Claims

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Application Information

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IPC IPC(8): E21D11/10
Inventor 徐龙江
Owner JIANGSU DINGJIA TECH
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