Portable small high-speed pneumatic shotcrete machine

Abstract

This utility model relates to the field of coal mine roadway gas protection technology, specifically to a portable, small, high-speed pneumatic shotcrete machine, mainly solving the technical problem that conventional shotcrete equipment cannot be used for crack sealing in existing roadways. The shotcrete machine includes: a slurry storage tank with a feed inlet on its top wall, equipped with a shut-off valve; two blowing ports on the bottom wall of the tank; an air inlet on the left side wall; and a discharge outlet on the right side wall; a first connecting pipe with its two ends connected to the air inlet and one of the blowing ports respectively; a second connecting pipe with its two ends connected to the two blowing ports respectively; and a shotcrete pipe with one end connected to the discharge outlet and the other end equipped with a nozzle, and also having a water inlet. This shotcrete machine has a simple structure, can operate using existing high-pressure air and water pipes in the roadway, can be designed to be small in size, and can be quickly transported by personnel, enabling the sealing of cracks in sealed walls in roadways with poor transportation conditions.

Description

Technical Field

[0001] This utility model relates to the field of coal mine roadway gas protection technology, and in particular to a portable, small, fast pneumatic shotcrete machine. Background Technology

[0002] Due to the stress in the mine, some of the sealed walls in the tunnels have developed cracks due to severe deformation, leading to air leakage and gas escape. Air leakage reduces ventilation performance, and gas escape threatens the safety of workers in the tunnels. Both air leakage and gas escape will affect normal production, so it is necessary to seal the cracks with shotcrete.

[0003] However, due to factors such as roadway floor bulging, roof subsidence, and sidewall compression, the roadway transportation conditions are poor, and the shotcrete machine equipment and supporting pipelines required for maintaining the airtightness cannot be transported to the site, making it impossible to maintain the airtightness wall in a timely and effective manner.

[0004] Therefore, there is an urgent need for a portable small shotcrete machine to seal cracks in sealed walls in tunnels with poor transportation conditions. Utility Model Content

[0005] To overcome the technical shortcomings of existing roadways where conventional shotcrete equipment cannot be used for crack sealing, this utility model provides a portable, small, fast pneumatic shotcrete machine.

[0006] The portable, small, high-speed pneumatic shotcrete machine provided by this utility model includes:

[0007] The slurry storage tank has a feed inlet on its top wall, which is equipped with a shut-off valve. The bottom wall of the slurry storage tank has two blowing ports. The left side wall of the slurry storage tank has an air inlet, which is suitable for connecting to a high-pressure air pipe in the roadway. The right side wall of the slurry storage tank has a discharge port, which is arranged opposite to the air inlet.

[0008] The first connecting pipe has its two ends connected to the air inlet and one of the blowing ports, respectively;

[0009] The second connecting pipe has two ends connected to two blowing ports respectively;

[0010] The spray pipe has one end connected to the discharge port and the other end equipped with a nozzle. The spray pipe is also equipped with a water inlet for connecting a water pipe.

[0011] Optionally, the feed inlet is provided with a feed funnel, and the shut-off valve is located between the feed inlet and the feed funnel.

[0012] Optionally, both the first connecting pipe and the second connecting pipe are high-pressure hoses.

[0013] Optionally, the air inlet is provided with a first tee pipe to connect the air inlet, the high-pressure air pipe and the first connecting pipe respectively.

[0014] Optionally, the blowing port used to connect to the first connecting pipe is provided with a second tee pipe to connect to the first connecting pipe, the blowing port and the second connecting pipe respectively.

[0015] Optionally, the top of the slurry storage tank is provided with a handle.

[0016] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0017] This portable, small, high-speed pneumatic shotcrete machine utilizes a simple design. Powder is added to a slurry storage tank through the inlet, and the shut-off valve is closed. The air inlet is then connected to a high-pressure air duct within the tunnel. High-pressure air is simultaneously blown out through the inlet and two outlets. The two outlets use a vertically upward airflow to suspend the powder, preventing it from settling at the bottom of the storage tank. The air inlet uses a horizontal, right-handed airflow to propel the suspended powder towards the outlet. The powder then enters the shotcrete pipe through the outlet and mixes with water flowing in through the water pipe to form a slurry. Finally, the slurry is sprayed through the nozzle onto cracks in the sealed wall, achieving sealing. This shotcrete machine has a simple structure, can operate using existing high-pressure air and water pipes within the tunnel, and can be designed to be small and quickly transported. It is suitable for sealing cracks in sealed walls even in tunnels with poor transportation conditions. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram showing the structure of the portable small-scale high-speed pneumatic shotcrete machine in an embodiment of this utility model.

[0021] In the picture:

[0022] 1. Slurry storage tank; 11. Feed inlet; 12. Shut-off valve; 13. Blowing port; 14. Air inlet; 15. Discharge port; 16. Feed funnel; 17. First tee pipe; 18. Second tee pipe; 19. Handle; 2. First connecting pipe; 3. Second connecting pipe; 4. Slurry spraying pipe; 41. Nozzle; 42. Water inlet. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0024] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0026] The following is combined Figure 1 The specific embodiments of this utility model will be described in detail below.

[0027] This embodiment provides a portable, small, fast pneumatic shotcrete machine, including a slurry storage tank 1, a first connecting pipe 2, a second connecting pipe 3, and a shotcrete pipe 4.

[0028] The slurry storage tank 1 has a feed inlet 11 on its top wall, and a shut-off valve 12 is installed in the feed inlet 11. The bottom wall of the slurry storage tank 1 has two blowing ports 13. The left side wall of the slurry storage tank 1 has an air inlet 14, which is suitable for connecting to a high-pressure air pipe in the roadway. The right side wall of the slurry storage tank 1 has a discharge port 15, which is arranged opposite to the air inlet 14.

[0029] Furthermore, the feed inlet 11 is equipped with a feed funnel 16, and a shut-off valve 12 is located between the feed inlet 11 and the feed funnel 16. The feed funnel 16 makes it easier for operators to add powder to the slurry storage tank 1.

[0030] Furthermore, the top of the slurry storage tank 1 is provided with a handle 19. The number of handles 19 is not limited, for example... Figure 1 Two are shown. Handle 19 makes it easier for operators to move the slurry storage tank 1.

[0031] It should be noted that since the air inlet 14 and the material outlet 13 blow out high-pressure air during use, even if residual powder enters the air inlet 14 or the material outlet 13 after blowing stops, the high-pressure air can blow out the residual powder when it is used again, without causing blockage. Of course, to avoid this phenomenon, filter screens can also be installed at the air inlet 14 and the material outlet 13, and the mesh size of the filter screens can be determined according to the particle size of the powder, so that the filter screens only allow gas to pass through and do not allow powder to pass through. This is something that those skilled in the art can easily design, and will not be elaborated here.

[0032] The two ends of the first connecting pipe 2 are respectively connected to the air inlet 14 and one of the blowing ports 13.

[0033] Specifically, the first connecting pipe 2 is a high-pressure hose. This high-pressure hose not only meets the pressure requirements of high-pressure air, but also has good deformation capacity, making installation more flexible and reducing wind resistance.

[0034] Specifically, the air inlet 14 is equipped with a first tee pipe 17 to connect the air inlet 14, the high-pressure air pipe, and the first connecting pipe 2 respectively. The three paths are connected by the first tee pipe 17, which makes the structural arrangement more reasonable and is also more conducive to ensuring the sealing of the connection.

[0035] The two ends of the second connecting pipe 3 are respectively connected to two blowing ports 13.

[0036] Specifically, all second connecting pipes 3 are high-pressure hoses. High-pressure hoses not only meet the pressure requirements of high-pressure air, but also have good deformation capacity, are more flexible in installation, and have less air resistance.

[0037] Specifically, the blowing port 13 used to connect the first connecting pipe 2 is provided with a second tee pipe 18 to connect the first connecting pipe 2, the blowing port 13, and the second connecting pipe 3 respectively. By connecting the three paths through the second tee pipe 18, the structural arrangement is more reasonable and it is also more conducive to ensuring the sealing of the connection.

[0038] One end of the shotcrete pipe 4 is connected to the discharge port 15 and the other end is provided with a nozzle 41. The shotcrete pipe 4 is also provided with a water inlet 42 for connecting to a water pipe.

[0039] It is easy to understand that since the powder needs to be mixed with water to form the required slurry, the spray pipe 4 needs to be connected to a water pipe so that the powder can be mixed with water to form a slurry before being blown out, and finally sprayed into the cracks of the sealed wall in the form of slurry.

[0040] It should be noted that the water pipe can be equipped with flow valves, pressure valves, and other structures to adaptively adjust the flow rate and pressure according to the state of the powder, thereby achieving better mixing with the aggregate. This is something that is easily designed by those skilled in the art, and will not be elaborated upon here.

[0041] The working principle of the portable, small, high-speed pneumatic shotcrete machine in this embodiment is as follows:

[0042] In use, the powder is added to the slurry storage tank 1 through the feed inlet 11, and then the shut-off valve 12 is closed. Next, the air inlet 14 is connected to the high-pressure air pipe in the tunnel. High-pressure air is blown out simultaneously through the air inlet 14 and the two blowing ports 13. The two blowing ports 13 blow the powder up and suspend it with the vertical upward airflow to prevent the powder from settling at the bottom of the slurry storage tank 1. The air inlet 14 blows the suspended powder to the discharge port 15 with the horizontal rightward airflow. After the powder enters the spray pipe 4 through the discharge port 15, it mixes with the water flowing in through the water pipe to form a slurry. Finally, it is sprayed through the nozzle 41 to the cracks in the sealed wall to achieve sealing.

[0043] The above are merely specific embodiments of this utility model, enabling those skilled in the art to understand or implement this utility model. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A portable, small, and rapid pneumatic mortar machine, characterized by, include: The slurry storage tank (1) has a feed inlet (11) on its top wall, and a shut-off valve (12) is installed in the feed inlet (11). The bottom wall of the slurry storage tank (1) has two blowing ports (13). The left side wall of the slurry storage tank (1) has an air inlet (14), and the air inlet (14) is suitable for connecting to a high-pressure air pipe in the roadway. The right side wall of the slurry storage tank (1) has a discharge port (15), and the discharge port (15) is arranged opposite to the air inlet (14). The first connecting pipe (2) is connected at both ends to the air inlet (14) and one of the blowing ports (13), respectively. The second connecting pipe (3) is connected to two blowing ports (13) at its two ends respectively. The spray pipe (4) has one end connected to the discharge port (15) and the other end provided with a nozzle (41). The spray pipe (4) is also provided with a water inlet (42) for connecting to a water pipe.

2. The portable small-sized quick air mortar machine according to claim 1, characterized in that, The feed inlet (11) is provided with a feed funnel (16), and the shut-off valve (12) is located between the feed inlet (11) and the feed funnel (16).

3. The portable, small, high-speed pneumatic shotcrete machine according to claim 1, characterized in that, Both the first connecting pipe (2) and the second connecting pipe (3) are high-pressure hoses.

4. The portable, small, high-speed pneumatic shotcrete machine according to claim 1, characterized in that, The air inlet (14) is provided with a first three-way pipe (17) to connect the air inlet (14), the high-pressure air pipe and the first connecting pipe (2) respectively.

5. The portable, small, high-speed pneumatic shotcrete machine according to claim 1, characterized in that, The blowing port (13) for connecting the first connecting pipe (2) is provided with a second tee pipe (18) to connect the first connecting pipe (2), the blowing port (13), and the second connecting pipe (3) respectively.

6. The portable, small, high-speed pneumatic shotcrete machine according to any one of claims 1 to 5, characterized in that, The top of the slurry storage tank (1) is provided with a handle (19).

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