A kind of concrete spraying machine
Technical field
The utility model relates to a kind of constructing tunnel engineering machinery, particularly a kind of concrete spraying machine.
Background technology
Concrete spraying machine is a kind of constructing tunnel preliminary bracing special equipment, concrete is in the duct by mechanism's pushed forward, and injecting compressed air and accelerating admixture in blender between concrete spraying machine nozzle and pipeline, spray with vaporific high speed through wet-spraying machine nozzle after forming pressurization Wet-type concrete, on top, tunnel, side basal plane rapid solidification forms firmly preliminary bracing layer.
In CN204552762U, disclose a kind of name be called " injection apparatus of tunnel concrete spraying machine ", it mainly comprises nozzle, Fast pipe hanger, flow mixing device, shown in the outer wall of nozzle concrete feed end be provided with the first annular link slot and annular compensating groove successively and form annular catch between the first annular link slot and annular compensating groove, the concrete discharge end outer wall of flow mixing device is provided with the second annular link slot, the inner face of Fast pipe hanger has circular orientation platform and is connected with the second annular link slot clamping of flow mixing device by first of nozzle the annular link slot, described nozzle is non-metallic elastic material.
Be partly or entirely nonmetals in its component of concrete spraying machine in above-mentioned patent, but not metal material part to bear compressed-air actuated high pressure in construction application, bear concrete high-speed friction, therefore nonmetals is fragile; Nonmetals part is in the connection of blender, pipeline, nozzle various piece simultaneously, usually by the connection of clip machinery, and the joint face damage easy to wear of nonmetals; And on the other hand, in this patent, mixer structure is complicated, weight is large, proposes high requirement, increase and manufacture difficulty, improve manufacturing cost the supporting mechanism of concrete spraying machine.
Utility model content
The purpose of this utility model be just to provide a kind of structure simple, use light concrete damping machine.
The purpose of this utility model is realized by such technical scheme, a kind of concrete spraying machine, comprise nozzle and reducer pipe, clamp connection is passed through in one end of described nozzle and one end of reducer pipe, the nozzle end of described nozzle and reducer pipe junction is provided with container cavity, in described container cavity, is provided with annular mixer.
Wherein, described annular mixer comprises annular mixing pipe, is vertically provided with at least one mixes circular pipe communicated inlet pipe with annular, described annular mixing circular tube external wall is provided with multiple spray-hole in described annular mixing pipe upper surface.
In order to improve the inlet of compressed air and accelerating admixture, described inlet pipe is two, and the vertical center line annularly mixing pipe is symmetrical arranged.
In order to compact conformation, be provided with the terminal pad be connected with nozzle in one end of described reducer pipe, described terminal pad is provided with two through holes, described two inlet pipes are each passed through two through holes.
In order to improve sealing, in described clip, being provided with cushion rubber, mixing pipe contact position with annular be provided with sealing ring at described nozzle, reducer pipe.
In order to improve abrasion resistance, described nozzle is metal material.
Owing to have employed technique scheme, the utility model has structure advantage simple, with low cost, adopts the weight that reducing complete machine, uses lighter, meanwhile, also improve the abrasion resistance of nozzle, extend application life.
Accompanying drawing explanation
Accompanying drawing of the present utility model is described as follows:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is annular mixer structural representation of the present utility model;
Fig. 3 is the utility model nozzle arrangements schematic diagram;
Fig. 4 is the utility model reducer pipe structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail; but the utility model is not limited to these embodiments; any improvement or alternative on the present embodiment essence spirit, still belongs to the utility model claim scope required for protection.
Embodiment 1: as shown in Figure 1, 2, a kind of concrete spraying machine, comprise nozzle 1 and reducer pipe 2, one end of described nozzle 1 is connected by clip 3 with one end of reducer pipe 2, at described nozzle 1, nozzle 1 end of reducer pipe 2 junction is provided with container cavity 4, in described container cavity 4, is provided with annular mixer.
As shown in Figure 3, wherein, described annular mixer comprises annular mixing pipe 5, is vertically provided with at least one and the annular inlet pipe 6 mixing pipe 5 and be communicated with in described annular mixing pipe 5 upper surface, and described annular mixing pipe 5 outer wall is provided with multiple spray-hole 7.
In order to improve inlet, described inlet pipe 6 is two, and the vertical center line annularly mixing pipe 5 is symmetrical arranged.
As shown in Figure 4, be provided with the terminal pad 8 be connected with nozzle 1 in one end of described reducer pipe 2, described terminal pad 8 is provided with two through holes 9, described two inlet pipes 6 are each passed through two through holes 9.
In order to improve its sealing, in described clip 3, being provided with cushion rubber 10, mixing pipe 5 contact position with annular be provided with sealing ring 11 at described nozzle 1, reducer pipe 2.
In order to improve abrasion resistance, increase the service life, described nozzle 1 is metal material.
In the utility model, the mist of compressed air and accelerating admixture is entered in annular mixing pipe 5 by inlet pipe 6, then is entered in nozzle 1 by spray-hole 7 ejection.