Mixing type spray gun suitable for spraying concrete through dry mixing method

Abstract

The mixing type spray gun comprises a material conveying pipe for conveying materials, a first connector is arranged on the end face of the material conveying pipe, a mixing pipe is arranged on the side face of the first connector, and the mixing pipe is divided into an outer mixing pipe body and an inner mixing pipe body. A water hole and a water pipe connector are arranged on the lower surface of the outer mixing pipe, a water inlet hole is formed in the inner wall of the inner mixing pipe, a second connector is arranged on the end face of the mixing pipe, a stirring pipe is arranged on the side, away from the mixing pipe, of the second connector, a stirring ring is arranged on the surface of the stirring pipe, and a stirring rod is arranged on the surface of the stirring ring. By introducing the mixing type spray gun and the cement paste dry-mixing concrete spraying technology, the common problems of dust diffusion and concrete springback in a traditional dry-mixing method project are solved, the environmental quality of a project site is improved, and the health and safety of engineers are also guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a mixing type spray gun suitable for dry mixing concrete spraying. Background Art

[0002] With the increasing requirements for the performance of shotcrete and the working environment, shotcrete technology has made major breakthroughs in the development of materials, engineering machinery and process methods. The development of admixtures and additives in shotcrete materials can improve the performance of concrete by adding various admixtures to shotcrete materials, such as accelerators, water reducers, viscosity enhancers, dust suppressants and air entraining agents; adding accelerators to shotcrete can make it safe, quick to set and harden, increase early strength, reduce rebound, and improve adaptability in humid areas; adding water reducers to shotcrete can reduce the water-cement ratio while maintaining the slump of concrete, increase concrete strength, reduce rebound, and significantly improve its impermeability and frost resistance; adding viscosity enhancers to shotcrete mixtures can significantly reduce engineering dust and rebound losses.

[0003] During the current dry-mix spraying method, the spray material is mixed with water 300 mm before the spray gun outlet. The mixing time is extremely short and there is no mixing and stirring mechanism. Therefore, the cement particles cannot be fully mixed and wetted with the water, resulting in a large amount of dust and rebound during spraying. Therefore, based on the existing equipment, a new spray gun structure is designed to fully mix and stir the water and cement, and fully wet the cement particles to achieve the purpose of reducing dust and rebound. Based on this idea, a mixing spray gun suitable for dry-mix shotcrete is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a mixing type spray gun suitable for dry mixing concrete spraying to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mixing spray gun suitable for dry-mixing shotcrete, comprising a feed pipe for conveying materials, the end face of the feed pipe is provided with a connector 1, the side of the connector 1 is provided with a mixing tube, and the mixing tube is divided into an outer mixing tube and an inner mixing tube, the lower surface of the outer mixing tube is respectively provided with a water eye and a water pipe joint, the inner wall of the inner mixing tube is provided with a water inlet, the end face of the mixing tube is provided with a connector 2, a stirring tube is provided on the side of the connector 2 away from the mixing tube, a stirring ring is provided on the surface of the stirring tube, and a stirring rod is provided on the surface of the stirring ring, a connector 3 is provided on the end of the stirring tube away from the connector 2, and a nozzle is provided on the side of the connector 3 away from the stirring tube.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Preferably, the specifications and models of the connector one, connector two and connector three are the same, and the three connectors are parallel to each other. By providing the same connectors, replacement and maintenance as well as connection with on-site equipment are facilitated.

[0008] Preferably, the two sides of the mixing inner tube and the mixing outer tube are fixedly connected to the opposite surfaces of connector one and connector two respectively, and an inner cavity is provided between the mixing inner tube and the mixing outer tube. By providing the inner cavity between the inner tube and the outer tube, water can flow in the inner cavity.

[0009] Preferably, the mixing inner tube is provided with twenty-four water inlet rings arranged in an annular manner at equal intervals laterally, and each ring is provided with 3-6 water inlet holes at different angles. By providing water inlet holes at different angles on the inner wall of the mixing inner tube, it is convenient for the liquid to enter the inner cavity of the mixing tube through the water inlet holes of the inner tube, so that the liquid and the high-speed moving dry material in the mixing cavity are quickly mixed, thereby achieving the effect of mixing dry mortar or dry concrete with liquid.

[0010] Preferably, the water inlet end of the water pipe joint is connected to the water pump, and the water outlet end of the water pipe joint passes through the lower surface of the mixing outer tube and is fixedly connected to the mixing outer tube. By arranging water holes and water pipe joints on the lower surface of the mixing outer tube, the water pipe joint is conveniently connected to the water pump in the water reservoir through a pipeline. When the water pressure inside the outer tube and the inner tube is too high, the inner cavity can be depressurized through the water holes. At the same time, three water rings are provided on the surface of the mixing outer tube, each water ring is equipped with four water holes, and the holes of the water holes are small, which facilitates the water holes to relieve pressure and drain water without affecting the water entering the inner tube to mix with the dry materials.

[0011] Preferably, two stirring rings are provided on the surface of the stirring tube, and six stirring rods are provided at equal distances on the circumference of the surface of the stirring ring. One end of the stirring rod passes through the outer ring of the stirring ring and extends to the central axis of the stirring tube. The stirring chamber in the stirring tube uses the stirring rods inserted in the cavity to cut the fluid passing through at high speed, thereby achieving the effect of stirring the concrete mixture.

[0012] Beneficial effects

[0013] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0014] This utility model solves the common problems of dust diffusion and concrete rebound in traditional dry-mixing projects by introducing a mixing spray gun and cement paste dry-mixing shotcrete technology. This not only improves the environmental quality of the construction site, but also ensures the health and safety of engineering personnel. It has important environmental significance and social responsibility for the construction industry.

[0015] Secondly, the application of new technologies has improved the uniformity and strength of concrete, optimizing project quality. By reducing the rebound rate of concrete, resource consumption and project costs have been effectively reduced, laying a solid foundation for the sustainable development of the project. This economic benefit is reflected not only in cost savings during the construction process, but also in improved long-term performance, extending the project's service life and reducing maintenance and repair costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front cross-section structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 3 for Figure 1 A in the middle is an enlarged structural diagram;

[0019] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of the AA and BB sections.

[0020] In the figure: 1. Feed pipe; 2. Connector 1; 3. Mixing pipe; 4. Inner mixing pipe; 5. Outer mixing pipe; 6. Water eye; 7. Water pipe joint; 8. Water inlet hole; 9. Connector 2; 10. Stirring pipe; 11. Stirring ring; 12. Stirring rod; 13. Connector 3; 14. Spray nozzle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4The utility model provides a technical solution: a mixing spray gun suitable for dry mixing concrete spraying, comprising a feeding pipe 1 for conveying materials, the end face of the feeding pipe 1 is provided with a connector 2, the side of the connector 2 is provided with a mixing tube 3, and the mixing tube 3 is divided into an outer mixing tube 5 and an inner mixing tube 4, the lower surface of the outer mixing tube 5 is respectively provided with a water hole 6 and a water pipe joint 7, the water inlet end of the water pipe joint 7 is connected to the water pump, and the water outlet end of the water pipe joint 7 passes through the lower surface of the outer mixing tube 5 and is fixedly connected to the outer mixing tube 5, by arranging the water hole 6 and the water pipe joint 7 on the lower surface of the outer mixing tube 5, it is convenient to connect the water pipe joint 7 to the water pump in the water reservoir through a pipeline, when the water pressure inside the outer tube and the inner tube is too large, the inner cavity can be depressurized through the water hole 6, at the same time, the surface of the outer mixing tube 5 is provided with three water rings, each water ring is evenly distributed with four water holes 6, and the holes of the water holes 6 are small, which is convenient for the water holes 6 to relieve pressure and drain water without affecting the water entering the inner tube to mix with the dry material.

[0023] The inner wall of the mixing inner tube 4 is provided with a water inlet hole 8, and the mixing inner tube 4 is provided with twenty-four water inlet rings arranged in a ring shape at equal intervals in the horizontal direction, and each ring is provided with 3-6 water inlet holes 8 at different angles. By providing water inlet holes 8 at different angles on the inner wall of the mixing inner tube 4, it is convenient for the liquid to enter the inner cavity of the mixing tube 3 through the water inlet holes 8 of the inner tube, so that the liquid and the high-speed moving dry material in the mixing cavity are quickly mixed, thereby achieving the effect of mixing dry mortar or dry concrete with liquid.

[0024] The end face of the mixing tube 3 is provided with a connector 2 9, and the two sides of the mixing inner tube 4 and the mixing outer tube 5 are fixedly connected to the opposite surfaces of the connector 1 2 and the connector 2 9 respectively, and an inner cavity is provided between the mixing inner tube 4 and the mixing outer tube 5. By providing the inner cavity between the inner tube and the outer tube, water can flow in the inner cavity.

[0025] A stirring tube 10 is provided on the side of the connector 2 9 away from the mixing tube 3, and a stirring ring 11 is provided on the surface of the stirring tube 10, and a stirring rod 12 is provided on the surface of the stirring ring 11. Two stirring rings 11 are provided on the surface of the stirring tube 10, and six stirring rods 12 are provided at equal distances on the circumference of the surface of the stirring ring 11. One end of the stirring rod 12 passes through the outer ring of the stirring ring 11 and extends to the central axis of the stirring tube 10. The stirring chamber in the stirring tube 10 uses the stirring rod 12 inserted in the cavity to cut the fluid passing through at high speed, thereby achieving the effect of stirring the concrete mixture.

[0026] A connector three 13 is provided at one end of the mixing tube 10 away from the connector two 9. The specifications and models of the connector one 2, connector two 9 and connector three 13 are the same, and the three connectors are parallel to each other. By setting the same connector, replacement and maintenance as well as connection with on-site equipment are facilitated. A nozzle 14 is provided on the side of the connector three 13 away from the mixing tube 10, and the mixing tube 3, the mixing tube 10 and the nozzle 14 form a mixing type spray gun, which has the problems of dust prevention and concrete rebound prevention. At the same time, the mixing type spray gun requires a sprayer and an air compressor to be used in conjunction.

[0027] Working Principle: The feed pipe 1 connector is connected to the feed pipe 1, and the mixing chamber is connected to the water supply pipe via the water supply pipe connector 7. The mixing chamber consists of an inner and outer pipe. The inner pipe sidewall is provided with 24 annularly arranged water inlet holes 8, with 3-6 water inlet holes 8 arranged at different angles in each ring. The outer pipe sidewall is provided with a connector for connecting to the water supply pipe, which guides water into the gap between the inner and outer pipes and enters the mixing chamber through the water inlet holes 8. The mixing chamber consists of a circular cross-section pipe and stirring rods 12, with 3-6 stirring rods 12 arranged radially at different angles inside the pipe. The nozzle 14 is a section of circular cross-section pipe. When the dry concrete material from the feed pipe 1 passes through the inner pipe of the mixing chamber, it mixes with the water from the multiple rings of water inlet holes 8, is stirred in the mixing chamber to form fully mixed concrete, and then enters the nozzle 14 and is sprayed onto the work surface.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixing spray gun suitable for dry mix shotcrete, characterized by: The invention comprises a material conveying pipe (1) for conveying materials, wherein the end face of the material conveying pipe (1) is provided with a connector 1 (2), a side face of the connector 1 (2) is provided with a mixing pipe (3), and the mixing pipe (3) is divided into an outer mixing pipe (5) and an inner mixing pipe (4), the lower surface of the outer mixing pipe (5) is provided with a water hole (6) and a water pipe joint (7), the inner wall of the inner mixing pipe (4) is provided with a water inlet (8), the end face of the mixing pipe (3) is provided with a connector 2 (9), a stirring pipe (10) is provided on the side of the connector 2 (9) away from the mixing pipe (3), a stirring ring (11) is provided on the surface of the stirring pipe (10), and a stirring rod (12) is provided on the surface of the stirring ring (11), a connector 3 (13) is provided on the end of the stirring pipe (10) away from the connector 2 (9), and a nozzle (14) is provided on the side of the connector 3 (13) away from the stirring pipe (10).

2. A mixing spray gun suitable for dry-mix shotcrete according to claim 1, characterized in that: The specifications and models of the connector one (2), connector two (9) and connector three (13) are the same, and the three connectors are parallel to each other.

3. The mixing spray gun suitable for dry-mix shotcrete according to claim 1, characterized in that: Both sides of the mixing inner tube (4) and the mixing outer tube (5) are fixedly connected to the opposite surfaces of the connector 1 (2) and the connector 2 (9), respectively, and an inner cavity is provided between the mixing inner tube (4) and the mixing outer tube (5).

4. The mixing spray gun suitable for dry-mix shotcrete according to claim 1, characterized in that: The mixing inner tube (4) is laterally provided with twenty-four water inlet rings arranged in an annular pattern at equal intervals, and each ring is provided with 3-6 water inlet holes (8) at different angles.

5. The mixing spray gun suitable for dry-mix shotcrete according to claim 1, characterized in that: The water inlet end of the water pipe joint (7) is connected to the water pump, and the water outlet end of the water pipe joint (7) penetrates the lower surface of the mixing outer tube (5) and is fixedly connected to the mixing outer tube (5).

6. The mixing spray gun suitable for dry-mix shotcrete according to claim 1, characterized in that: Two stirring rings (11) are provided on the surface of the stirring tube (10), and six stirring rods (12) are provided at equal intervals on the circumference of the surface of the stirring ring (11). One end of the stirring rod (12) passes through the outer ring of the stirring ring (11) and extends to the central axis of the stirring tube (10).

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