Plugging grouting pipe suitable for coal mine grouting and water plugging

Abstract

The plugging grouting pipe comprises a grouting pipe body (1), a limiting flange (3) is fixedly installed in the middle of the grouting pipe body (1), an annular groove is formed in the side, facing the coal wall, of the limiting flange (3), a stirring wheel (8) is installed in the annular groove, and a plugging part (4) is connected to the surface of the grouting pipe body (1) on the side, provided with the stirring wheel (8), of the limiting flange (3) in a sleeved mode. A plugging part (4) is arranged outside the grouting pipe, a cavity is formed in the plugging part (4), the cavity is divided into a polystyrene foam A material cavity (6) and a polystyrene foam B material cavity (7) through a thin film, and the sides, facing the stirring wheel (8), of the polystyrene foam A material cavity (6) and the polystyrene foam B material cavity (7) are made of plastic thin films and attached to the stirring wheel (8). The built-in polystyrene foam expands to pressurize the plugging part, all gaps of the grouting hole are filled, the grouting hole can be effectively sealed, and grout can be effectively prevented from seeping out.

Description

Technical Field

[0001] The utility model relates to the field of coal mine construction, in particular to a plugging grouting pipe suitable for coal mine grouting water plugging. Background Technique

[0002] During the production of coal mines, due to the goaf of coal seams, the formation collapses, and the fractured formation zone causes groundwater to seep downward. The continuously gushing water will seriously affect the safety of the mine. In order to control water hazards, the current main method is to grout the coal seam to block the water outlet fissures, thereby controlling water hazards. However, when grouting, due to the pressure requirement of the grout, if the seal between the drill hole and the grouting pipe is not good, the grout will seep out, resulting in waste of grout. The current mainstream anti-leakage method is to sleeved a rubber ring outside the grouting pipe. However, if the rubber ring is too large, it cannot be inserted into the grouting hole, and if it is too small, there is no sealing effect, which is extremely troublesome to use. Even if it fits properly, the rubber ring cannot completely fit the inner wall of the grouting hole, and there will still be grout flowing out, resulting in waste of grout.

[0003] At present, the utility model with the patent publication number CN221346994U discloses a special grout plug for mine grouting bolts, including a limiting member, an annular expansion member and an extrusion member, wherein: the limiting member is fixed on the outer side of the grouting bolt; the annular expansion member is sleeved on the outer side of the grouting bolt, and its inner end abuts against the limiting member; the extrusion member is arranged on the grouting bolt outside the annular expansion member for applying an inward acting force to the annular expansion member to drive the annular expansion member to radially expand and be in close contact with the inner wall of the drill hole, so as to realize the plugging of the drill hole; the utility model uses the co-deformation of the built-in thin wire and the rubber sleeve to generate a greater radial extrusion with the inner wall of the drill hole, and can withstand a greater grouting pressure; the anti-leakage rubber ring is more closely combined with the grouting bolt, reducing the phenomena of grout overflow, leakage, spraying or punching.

[0004] It can be seen from the above disclosed technical content that, as the prior art, the utility model with the publication number CN221346994U seals the drill hole by extruding the rubber sleeve to make it deformed. However, this plugging method is limited by the length of the rubber sleeve and the characteristics of the rubber itself, and its expansion range is limited. If the pressure is not enough, there may still be gaps left, resulting in grout seepage, and its use has great limitations. Summary of the Invention

[0005] Aiming at the problems existing in the above prior art, the utility model provides a plugging grouting pipe suitable for coal mine grouting water plugging, which can effectively seal the grouting hole and effectively prevent the grout from seeping out.

[0006] In order to achieve the above object, a plugging grouting pipe applicable to coal mine grouting water blocking of the present utility model comprises a grouting pipe body, a stirring wheel driving part, a driving wind wheel, a transmission shaft, a driving gear, an air pipe connection port, a wind wheel protection housing, a limiting flange, a plugging part, a plugging part hoop, a foaming agent A material cavity, a foaming agent B material cavity, a stirring wheel, stirring blades, a stirring wheel body, a driving tooth ring and a stirring wheel flange. A limiting flange is fixedly installed in the middle of the grouting pipe body. An annular groove is formed on one side of the limiting flange facing the coal wall for installing the stirring wheel. On the other side of the limiting flange, the stirring wheel driving part is installed through a bracket. The stirring wheel driving part is drivingly connected to the stirring wheel. The plugging part is sleeved on the surface of the grouting pipe body on the side where the stirring wheel is installed on the limiting flange. A cavity is arranged inside the plugging part. The cavity is divided into a foaming agent A material cavity and a foaming agent B material cavity by a film. The sides of the foaming agent A material cavity and the foaming agent B material cavity facing the stirring wheel are made of plastic film and are attached to the stirring wheel.

[0007] In addition, the plugging grouting pipe applicable to coal mine grouting water blocking proposed according to the above embodiment of the present utility model may further have the following additional technical features:

[0008] As a further improvement scheme of the present utility model, the stirring wheel driving part comprises a driving wind wheel, a transmission shaft, a driving gear, an air pipe connection port and a wind wheel protection housing. The wind wheel protection housing is installed on the surface of the grouting pipe body through a bracket. The driving wind wheel is installed inside the wind wheel protection housing through a bearing. The driving wind wheel is drivingly connected to the driving gear through the transmission shaft. The driving gear drives the stirring wheel to rotate. A through hole is formed in the upper part of the wind wheel protection housing for installing the air pipe connection port. The air pipe connection port is opposite to the blades on the surface of the driving wind wheel.

[0009] As a further improvement scheme of the present utility model, the stirring wheel comprises stirring blades, a stirring wheel body, a driving tooth ring and a stirring wheel flange. The stirring wheel flange is installed at the edge of the stirring wheel body. The stirring wheel flange is embedded in the limiting flange. Ball bearings are arranged on the surface of the stirring wheel flange. Stirring blades are fixedly installed on one side of the stirring wheel body facing the plugging part. The driving tooth ring is fixedly installed on the other side of the stirring wheel body. The driving gear meshes with the driving tooth ring.

[0010] As a further improvement scheme of the present utility model, the plugging part is made of soft rubber or plastic film.

[0011] As a further improvement scheme of the present utility model, a butterfly valve or a ball valve is equipped at the connection end of the grouting pipe body.

[0012] By means of the above scheme, the present utility model has at least the following advantages: Compared with the conventional anti-leakage method, by arranging a plugging part on the outside of the grouting pipe that can be expanded and extruded by the foaming agent, and by means of the built-in foaming agent to expand and pressurize the plugging part and fill all the gaps of the grouting hole, the grouting hole can be effectively sealed, and the leakage of the grout can be effectively prevented. Description of the Drawings

[0013] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0014] Figure 2 is a structural schematic diagram of the present utility model;

[0015] Figure 3 is a three-dimensional view of the present utility model with the plugging part removed;

[0016] Figure 4 is Figure 2 a partial enlarged view of the A position of

[0017] Figure 5 is Figure 2 a partial enlarged view of the B position of

[0018] Figure 6 is a three-dimensional view of the driving wind wheel, transmission shaft and driving gear of the present utility model;

[0019] In the figure: 1, the main body of the grouting pipe; 2, the stirring wheel driving part; 2-1, the driving wind wheel; 2-2, the transmission shaft; 2-3, the driving gear; 2-4, the air duct connection port; 2-5, the wind wheel protection housing; 3, the limiting flange; 4, the plugging part; 5, the plugging part hoop; 6, the foaming agent A material cavity; 7, the foaming agent B material cavity; 8, the stirring wheel; 8-1, the stirring blade; 8-2, the stirring wheel main body; 8-3, the driving tooth ring; 8-4, the stirring wheel flange. Specific embodiments

[0020] The present utility model will be further described below with reference to the accompanying drawings.

[0021] In the first embodiment of the present application, as Figures 1 to 3 shown, a plugging grouting pipe suitable for coal mine grouting and water blocking (hereinafter simply referred to as "the present invention") includes the main body of the grouting pipe 1, the stirring wheel driving part 2, the driving wind wheel 2-1, the transmission shaft 2-2, the driving gear 2-3, the air duct connection port 2-4, the wind wheel protection housing 2-5, the limiting flange 3, the plugging part 4, the plugging part hoop 5, the foaming agent A material cavity 6, the foaming agent B material cavity 7, the stirring wheel 8, the stirring blade 8-1, the stirring wheel main body 8-2, the driving tooth ring 8-3, and the stirring wheel flange 8-4. The limiting flange 3 is fixedly installed in the middle of the main body of the grouting pipe 1. An annular groove is opened on the side of the limiting flange 3 facing the coal wall to install the stirring wheel 8. The stirring wheel driving part 2 is installed on the other side of the limiting flange 3 through a bracket. The stirring wheel driving part 2 is drivingly connected to the stirring wheel 8. The plugging part 4 is sleeved on the surface of the main body of the grouting pipe 1 on the side where the stirring wheel 8 is installed on the limiting flange 3. A cavity is provided inside the plugging part 4. The cavity is divided into the foaming agent A material cavity 6 and the foaming agent B material cavity 7 by a film. The sides of the foaming agent A material cavity 6 and the foaming agent B material cavity 7 facing the stirring wheel 8 are made of plastic film and are attached to the stirring wheel 8.

[0022] The utility model announcement number is CN221346994U, which is a special grouting plug for grouting anchor rods for mining (hereinafter referred to as "this patent"). This patent seals the drill hole by squeezing the rubber sleeve to deform it, but this sealing method is limited by the length of the rubber sleeve and the characteristics of the rubber itself, and its expansion range is limited. If the pressure is not enough, gaps may still be left, resulting in slurry seepage, and its use is relatively limited. The present invention uses the pressure of the expansion of the foamed glue after the foamed glue A cavity 6 and the foamed glue B cavity 7 are mixed to push the rubber shell of the sealing part 4 to occupy all the gaps in the grouting hole. It is simple to use and ensures the sealing effect, effectively preventing slurry leakage.

[0023] The structure of the second embodiment is basically the same as that of the first embodiment, except that Figures 2 to 6 As shown, the stirring wheel driving part 2 includes a driving wind wheel 2-1, a transmission shaft 2-2, a driving gear 2-3, an air duct connection port 2-4 and a wind wheel protection shell 2-5. The wind wheel protection shell 2-5 is installed on the surface of the grouting pipe body 1 through a bracket. The driving wind wheel 2-1 is installed inside the wind wheel protection shell 2-5 through a bearing. The driving wind wheel 2-1 is connected to the driving gear 2-3 through the transmission shaft 2-2. The driving gear 2-3 drives the stirring wheel 8 to rotate. A through hole is provided on the upper part of the wind wheel protection shell 2-5 to install the air duct connection port 2-4. The air duct connection port 2-4 is directly opposite to the blades on the surface of the driving wind wheel 2-1. The stirring wheel 8 includes a stirring blade 8-1, a stirring wheel body 8-2, a driving gear ring 8-3 and a stirring wheel flange 8-4. The stirring wheel flange 8-4 is installed on the edge of the stirring wheel body 8-2, and the stirring wheel flange 8-4 is embedded in the limiting flange 3. Balls are provided on the surface of the stirring wheel flange 8-4. The stirring blade 8-1 is fixedly installed on the side of the stirring wheel body 8-2 facing the sealing part 4, and the driving gear ring 8-3 is fixedly installed on the other side of the stirring wheel body 8-2. The driving gear 2-3 engages with the driving gear ring 8-3.

[0024] In order to further optimize the working efficiency of the present application, the blocking portion 4 is made of soft rubber or plastic film. If rubber is used, it can be propped up when the foam glue expands to form a seal. If a plastic film is used, the foam glue will break the plastic film when it expands, and the foam glue will complete the filling of the gap between the grouting pipe and the grouting hole. In order to facilitate closing the grouting pipe and prevent the slurry from flowing back, the connection end of the grouting pipe body 1 is equipped with a butterfly valve or a ball valve.

[0025] When in use, install the sealing grouting pipe suitable for grouting and water blocking in coal mines, connect it to the grouting pump equipment and it can be put into use.

[0026] When the utility model is in use, the specific operations are as follows:

[0027] In use, first use a drilling machine to drill a grouting hole, then connect the feed port of the grouting pipe body 1 to the pipeline of the grouting pump, insert the end of the grouting pipe body 1 with the plugging part 4 into the grouting hole until the limit flange 3 fits the opening of the grouting hole. Then connect the air pipe pipeline to the air pipe connection port 2-4 of the mixing wheel driving part 2, open the air pipe valve, and the high-pressure air in the air pipe impacts the blades of the driving wind wheel 2-1. The driving wind wheel 2-1 rotating at high speed drives the driving gear 2-3 to rotate through the transmission shaft 2-2. The driving gear 2-3 drives the driving gear ring 8-3, and the driving gear ring 8-3 drives the mixing wheel 8 and the mixing blades 8-1 to rotate. The rotating mixing blades 8-1 tear the films that fit the foaming agent A material chamber 6 and the foaming agent B material chamber 7, bringing the A material and the B material into contact and mixing them with each other under the action of the mixing blades 8-1. After mixing, the A material and the B material can start to foam. When foaming, the foaming agent starts to expand rapidly, causing the plugging part 4 to expand and fit the inner wall of the grouting hole, or the foaming agent breaks through the plugging part 4 and fills the gap. Then the grouting pump can be started to inject the slurry into the water outflow crack.

[0028] Among them, in order to prevent the mixing blades 8-1 from being unable to cut the plastic film, the edges of the mixing blades 8-1 need to be polished to make them sharp.

[0029] In summary, the plugging grouting pipe applicable to coal mine grouting and water blocking in the embodiment of the present invention, by arranging a plugging part 4 that can be expanded and extruded by the foaming agent outside the grouting pipe, using the built-in foaming agent to expand and pressurize the plugging part 4, and filling all the gaps of the grouting hole, can effectively seal the grouting hole and prevent the slurry from leaking out effectively.

[0030] Those of ordinary skill in the art should understand that: the discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plugging grouting pipe applicable to coal mine grouting water blocking, comprising a grouting pipe body (1), characterized in that, A limiting flange (3) is fixedly installed in the middle of the grouting pipe body (1). An annular groove is formed on the side of the limiting flange (3) facing the coal wall for installing a mixing wheel (8). On the other side of the limiting flange (3), a mixing wheel driving part (2) is installed through a bracket. The mixing wheel driving part (2) is drivingly connected to the mixing wheel (8). A plugging part (4) is sleeved on the surface of the grouting pipe body (1) on the side of the limiting flange (3) where the mixing wheel (8) is installed. A cavity is provided inside the plugging part (4), and the cavity is divided into a foaming agent A material cavity (6) and a foaming agent B material cavity (7) by a film. The sides of the foaming agent A material cavity (6) and the foaming agent B material cavity (7) facing the mixing wheel (8) are made of plastic film and are attached to the mixing wheel (8); The mixing wheel (8) includes mixing blades (8-1), a mixing wheel body (8-2), a driving gear ring (8-3) and a mixing wheel flange (8-4). A mixing wheel flange (8-4) is installed at the edge of the mixing wheel body (8-2). The mixing wheel flange (8-4) is embedded in the limiting flange (3). Ball bearings are provided on the surface of the mixing wheel flange (8-4). Mixing blades (8-1) are fixedly installed on the side of the mixing wheel body (8-2) facing the plugging part (4), and a driving gear ring (8-3) is fixedly installed on the other side of the mixing wheel body (8-2). A driving gear (2-3) meshes with the driving gear ring (8-3).

2. The plugging grouting pipe applicable to coal mine grouting water blocking according to claim 1, characterized in that, The mixing wheel driving part (2) includes a driving wind wheel (2-1), a transmission shaft (2-2), a driving gear (2-3), an air pipe connection port (2-4) and a wind wheel protection housing (2-5). The wind wheel protection housing (2-5) is installed on the surface of the grouting pipe body (1) through a bracket. The driving wind wheel (2-1) is installed inside the wind wheel protection housing (2-5) through a bearing. The driving wind wheel (2-1) is drivingly connected to the driving gear (2-3) through the transmission shaft (2-2). The driving gear (2-3) drives the mixing wheel (8) to rotate. A through hole is formed in the upper part of the wind wheel protection housing (2-5) for installing the air pipe connection port (2-4), and the air pipe connection port (2-4) is facing the blades on the surface of the driving wind wheel (2-1).

3. A plugging grouting pipe applicable to coal mine grouting water blocking according to claim 1, characterized in that, The plugging part (4) is made of soft rubber or plastic film.

4. A plugging grouting pipe applicable to coal mine grouting water blocking according to claim 3, characterized in that, A butterfly valve or a ball valve is equipped at the connection end of the grouting pipe body (1).

Images