Negative pressure type concrete wet-spray machine set

Abstract

The invention discloses a negative pressure type concrete wet-spray machine set which comprises a pneumatic transmission sprayer (1), a rack (3), a venturi tube (16) and a spiral burdening and stirring device, wherein the venturi tube is fixed on a support frame (18) on a base, is connected with a wind pipe base (19) by a short circular pipe welded with the back end of the venturi tube, and is connected with a hopper (17) by a short circular pipe of which the back end is perpendicular to the axis direction; the spiral burdening and stirring device consists of a driving mechanism, a mixing hopper (1), a gravel hopper (3), a spiral stirring shaft (4), a cement hopper (5), a bearing (7) and a bearing cover (8), wherein two ends of the spiral stirring shaft are supported in the mixing hopper by the bearing, and the gravel hopper and the cement hopper are arranged above the mixed hopper of the end where the spiral mixing shaft is arranged. The negative pressure type concrete wet-spray machine set is compact in structure, and integrates the functions of burdening, stirring, transmitting and spraying, the work condition can be improved, the labor intensity can be reduced, the burdening can be exactly adjusted, and the negative pressure type concrete wet-spray machine set is stable in support quality and high in work efficiency.

Description

technical field [0001] The invention relates to a negative pressure concrete wet spraying unit, which belongs to the technical field of construction machinery. Background technique [0002] Concrete spraying machine is a kind of construction equipment widely used in underground engineering, geotechnical engineering and other fields. It uses compressed air as power to spray a certain proportion of mixed material through the pipeline at high speed to the surface to be sprayed and then solidifies and hardens. , thus forming a concrete support layer. Concrete spraying machines are divided into dry spraying machines and wet spraying machines according to the water content of the sprayed materials. The dust concentration next to the dry spraying machine is large, the spraying rebounds a lot, the working environment is extremely harsh, material waste and support quality are poor, so dry spraying The wet spraying machine is gradually replaced by the wet spraying machine. The wet sp...

AI Technical Summary

Problems solved by technology

Concrete spraying machines are divided into dry spraying machines and wet spraying machines according to the water content of the sprayed materials. The dust concentration next to the dry spraying machine is large, the spraying rebounds a lot, the working environment is extremely harsh, material waste and support quality are poor, so dry spraying The wet spraying machine is gradually replaced by the wet spraying machine. The wet spraying machine overcomes or partially overcomes the shortcomings of the dry spraying machine, reduces the dust concentration, improves the working conditions of the workers, and improves the support quality, but there are still the following problems: the domestic wet spraying machine Most of them are rotor-type, with serious lining wear and difficult sealing; manual batching cannot guarantee the quality of concrete, which ultimately affects the quality of support; lack of integration of feeding, mixing, mixing, conveying and spraying, and low construction efficiency

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