A mine foam slurry mixer

Abstract

The invention discloses a mine foam slurry mixer, comprising a mixer shell (7) and a hollow screw rod (5) installed inside the mixer shell (7); the front end of the mixer shell (7) There is a gas-liquid two-phase foam inlet (1), a slurry inlet (2) at the lower end, a manual valve (15) and a foam slurry outlet (16) at the rear end; a front end bearing (3 ), the rear end is provided with a rear end bearing (13); the front end bearing and the rear end bearing are respectively fixed on the inner side of the mixer shell through the support arm (14); the hollow screw rod is a hollow rod on which several spiral-shaped Blades, and several guide ports (8) are evenly opened along the rod body; several power blades are installed on the front of the hollow screw rod, facing the entrance of the gas-liquid two-phase foam, and the installation angle of the power blades is 30-40° . The invention has low foam breaking rate, high foam mixing quality, and can continuously produce large-flow foam slurry.

Description

technical field [0001] The invention relates to a mixer, in particular to a mine foam slurry mixer. Background technique [0002] Spontaneous coal combustion is one of the main disasters faced by my country's coal mine safety production, which seriously threatens the safety of underground workers and the normal mining of the working face, resulting in significant economic losses. Foam slurry, as a leak-stopping, oxygen-separating, fire-preventing material, has the function of strong stability, good fluidity, and the ability to avoid the phenomenon of pulling grooves caused by simply injecting yellow mud (cement, fly ash) slurry, and will become a coal mine grouting material. New directions for fire-resistant materials. [0003] At present, there is no special foam slurry generating device at the coal mine site, but the traditional mobile grouting device is used to stir and mix the foaming agent and the slurry together, and the two processes of foaming and mixing are integra...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no special foam slurry generating device at the coal mine site, but the traditional mobile grouting device is used to stir and mix the foaming agent and the slurry together, and the two processes of foaming and mixing are integrated through the stirring of the screw. At the same time, the foaming ability of the foam is greatly reduced, so that the foaming ratio of the foam slurry is low, the cells are uneven, and the stability is poor; although there are mixers that can mix foam and slurry in the traditional building materials field, they are not suitable for narrow spaces. In the shaft space; in recent years, the field of building materials has improved the mixing process of prefabricated foam and yellow mud (cement, fly ash) slurry. First, the two high-pressure fluids of foam and slurry are mixed through a tee, and then passed through a static mixer. Mix thoroughly again, but because the foam liquid is added at one time during the mixing process, the foam rate is too high, about 40%, and it is not suitable for fire extinguishing

Images