Magnetic slurry grouting device for coal mine

Abstract

The utility model discloses a kind of magnetic slurry grouting machines for coal mine, specifically related to grouting technical field.Magnetic slurry grouting machine for coal mine includes: grouting barrel, grouting pump and grouting assembly, grouting pump is equipped with feed pipe and discharge pipe, the feed pipe is connected with the grouting barrel, the discharge pipe is connected with the grouting assembly, the grouting pump is sent to grouting assembly in the magnetic slurry of grouting barrel inside, the grouting assembly includes blanking head and grouting head, the blanking head includes blanking pipe, the blanking pipe is equipped with central hole, annular groove is opened in the blanking pipe outside, air bag is installed in the annular groove inside, installation cavity is also opened in the central hole inside, a plurality of connecting holes are opened in the installation cavity inside.The magnetic slurry grouting machine for coal mine provided by the utility model effectively prevents the back liquid phenomenon in grouting process, ensures the stability of slurry pressure in grouting pipe, thereby improve the efficiency and quality of grouting.

Description

Technical Field

[0001] This utility model relates to the field of grouting technology, and in particular to a magnetic grouting device for coal mines. Background Technology

[0002] Methane gas is a common and potentially hazardous gas during coal mining. Its accumulation not only affects safe production in the mine but can also lead to serious accidents such as gas explosions. Therefore, effective detection and control of methane in coal seams is a crucial component of coal mine safety work. Traditional methane detection methods mainly rely on borehole sampling and sensor monitoring, but these methods have limitations, such as low detection accuracy, complex operation, and high cost.

[0003] In recent years, with the development of materials science, magnetic grout has gradually attracted attention as an emerging detection medium. Magnetic grout possesses excellent fluidity and magnetic response characteristics, allowing it to diffuse and adsorb onto the surface of coal seam fractures. Changes in its magnetic signal can be detected to reflect the structure and fracture distribution of the coal seam. However, existing magnetic grouting equipment still suffers from some problems during use, such as the tendency for backflow at the grouting nozzle, which reduces the grout pressure inside the grouting pipe and affects the grouting effect.

[0004] Therefore, it is necessary to provide a magnetic grout injector for coal mines to solve the above-mentioned technical problems. Utility Model Content

[0005] In response to the above situation and to overcome the defects of the existing technology, this utility model provides a magnetic grout injector for coal mines that effectively prevents backflow during the grouting process, ensures the stability of the grout pressure in the grouting pipe, and thus improves the efficiency and quality of grouting.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A magnetic grout injector for coal mines includes: a grouting tank, a grouting pump, and a grouting assembly. The grouting pump is equipped with an inlet pipe and an outlet pipe. The inlet pipe is connected to the grouting tank, and the outlet pipe is connected to the grouting assembly. The grouting pump delivers magnetic grout from inside the grouting tank to the grouting assembly. The grouting assembly includes a sealing head and a grouting head. The sealing head includes a sealing tube with a central hole and an annular groove on its exterior. An air bladder is installed inside the annular groove. An installation cavity is also provided inside the central hole. Multiple connecting holes are provided inside the installation cavity, and the connecting holes communicate with the annular groove. A spring is installed inside the installation cavity. A movable groove is fixedly installed at one end of the spring, and the movable groove is slidably and sealingly connected to the installation cavity. A first material hole is provided on the side of the movable groove connected to the spring.

[0008] The grouting head includes a connecting pipe, which is installed inside the central hole. A portion of the connecting pipe extends into the mounting cavity and is inserted into the moving groove. A cavity is formed on the wall of the connecting pipe, and multiple second material holes are formed on the connecting pipe, all of which communicate with the cavity.

[0009] Preferably, the connecting pipe is equipped with a first feed pipe and a second feed pipe, the first feed pipe is connected to the cavity of the connecting pipe, the second feed pipe is connected to the cavity, and a tee connector is installed at one end of the connecting pipe, the tee connector being connected to the discharge pipe and the second feed pipe.

[0010] Preferably, a first gate valve and a second gate valve are installed on the first feed pipe and the second feed pipe, respectively. By controlling the opening and closing of the first gate valve and the second gate valve, the order in which the magnetic slurry enters the annular groove and the grouting pipe can be controlled. In use, the first gate valve is first closed and the second gate valve is open. The magnetic slurry first enters the annular groove through the feed pipe, causing the airbag to block the grouting pipe. After the blockage is completed, the second gate valve is closed and the first gate valve is opened, allowing the magnetic slurry to enter the grouting pipe.

[0011] Preferably, the connecting pipe is threaded to the sealing pipe, which facilitates the separation of the sealing head and the grouting head.

[0012] Preferably, a pressure plate is fixedly installed on the connecting pipe, and a sealing gasket is installed on one side of the pressure plate. When the connecting pipe is installed on the sealing pipe, the pressure plate is in close contact with one side of the sealing pipe, which can prevent magnetic slurry from flowing out along the threaded connection.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) By adopting the design of the sealing component, the backflow phenomenon during the grouting process is effectively prevented, and the grout pressure in the grouting pipe is kept stable, thereby improving the efficiency and quality of grouting.

[0015] (2) The threaded connection design between the connecting pipe and the sealing pipe makes it easier to separate the sealing head and the grouting head, and facilitates the maintenance and replacement of the equipment.

[0016] (3) After grouting is completed, the grouting head can be removed directly and the next grouting pipe can be grouted, thereby improving the efficiency of grouting. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the magnetic grout injector for coal mines provided by this utility model;

[0018] Figure 2A schematic diagram of an embodiment of the magnetic grout injector for coal mines provided by this utility model;

[0019] Figure 3 This is a schematic diagram of the grouting assembly structure;

[0020] Figure 4 This is a cross-sectional view of the grouting assembly.

[0021] Figure 5 for Figure 4 Enlarged view of section A;

[0022] Figure 6 This is an exploded view of the grouting assembly.

[0023] The corresponding names of the attached figures are as follows: 1-grouting bucket, 2-grouting pump, 3-grouting assembly, 4-sealing pipe, 5-center hole, 6-annular groove, 7-airbag, 8-airbag, 9-connecting hole, 10-spring, 11-moving groove, 12-first material hole, 13-connecting pipe, 14-cavity, 15-second material hole, 16-pressure plate, 17-first feed pipe, 18-second feed pipe, 19-tee connector, 20-first gate valve, 21-second gate valve. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0025] Example 1

[0026] like Figures 1-6As shown, this utility model provides a magnetic grout injector for coal mines, comprising: a grouting tank 1, a grouting pump 2, and a grouting assembly 3. The grouting pump 2 is equipped with an inlet pipe and an outlet pipe. The inlet pipe is connected to the grouting tank 1, and the outlet pipe is connected to the grouting assembly 3. The grouting pump 3 transports the magnetic grout inside the grouting tank 1 to the grouting assembly 3. The grouting assembly 3 is inserted into the grouting pipe and transports the magnetic grout into the grouting pipe. The grouting assembly 3 includes a sealing head and a grouting head. The sealing head is used to seal the inner wall of the grouting pipe, preventing the magnetic grout from flowing back to the grouting pipe opening through the inside of the grouting pipe. The sealing head includes a sealing tube 4, which has a central hole 5. An annular groove 6 is formed on the outside of the sealing tube 4. An air bladder 7 is installed inside the annular groove 6. Under the action of the air bladder 7, the annular groove 6 forms a closed space. The central hole 5 also contains... An installation cavity 8 is provided, and multiple connecting holes 9 are provided inside the installation cavity 8. The connecting holes 9 communicate with the annular groove 6. Under the action of the connecting holes 9, the central hole 5, the annular groove 6 and the installation cavity 8 form a connected cavity. A spring 10 is installed inside the installation cavity 8. A movable groove 11 is fixedly installed at one end of the spring 10. The movable groove 11 is slidably and sealingly connected to the installation cavity 8. In the initial state, the movable groove 11 can block the connecting holes 9. A first material hole 12 is provided on the side of the movable groove 11 connected to the spring 10. When in use, the grouting head is inserted into the movable groove 11 and pushes the movable groove 11 to move. During the movement, the movable groove 11 compresses the spring 11. At the same time, the connecting holes 9 and the installation cavity 8 are connected. After the grouting head and the sealing head are fully connected, the sealing head is inserted into the grouting pipe so that the outermost edge of the sealing pipe 4 is flush with the opening of the grouting pipe.

[0027] The grouting head includes a connecting pipe 13, which is installed inside the central hole 5. A portion of the connecting pipe 13 extends into the mounting cavity 8 and is inserted into the moving groove 11. A cavity 14 is formed in the wall of the connecting pipe 13, and multiple second material holes 15 are formed on the connecting pipe 13, all of which communicate with the cavity 14. A first feed pipe 17 and a second feed pipe 18 are installed on the connecting pipe 13. The first feed pipe 17 communicates with the cavity of the connecting pipe 13, and the second feed pipe 18 communicates with the cavity 14. In use, the magnetic grout flows into the cavity of the connecting pipe 13 through the first feed pipe 17 and enters the mounting cavity 8 through the first material hole 12. Subsequently, the grout enters the central hole 5 until the magnetic grout flows through the cavity 14. The grout enters the grouting pipe through the central hole 5 to achieve grouting. At the same time, during use, the second feed pipe 18 delivers magnetic grout into the cavity 4. The magnetic grout enters the annular groove 6 through the second feed hole 15 and the connecting hole 9. As the magnetic grout continues to enter the annular groove 6, the airbag 7 gradually expands and thickens until it completely blocks the grouting pipe, achieving a seal inside the grouting pipe and preventing the magnetic grout in the grouting pipe from flowing back to the grouting port. One end of the connecting pipe 13 is equipped with a three-way connector 19, which is connected to the discharge pipe and the second feed pipe 18. During use, the grouting pump 2 is started, and the grouting pump 2 delivers the magnetic grout in the grouting tank 1 to the three-way connector 19. The magnetic grout enters the grouting pipe and the annular groove 6 through the first feed pipe 17 and the second feed pipe 18, respectively.

[0028] Example 2

[0029] like Figure 3 As shown, a first gate valve 20 and a second gate valve 21 are respectively installed on the first feed pipe 17 and the second feed pipe 18. By controlling the opening and closing of the first gate valve 20 and the second gate valve 21, the order in which the magnetic slurry enters the annular groove 6 and the grouting pipe can be controlled. In use, the first gate valve 20 is first closed and the second gate valve 21 is open. The magnetic slurry first enters the annular groove 6 through the feed pipe 18, causing the airbag 7 to block the grouting pipe. After the blocking is completed, the second gate valve 21 is closed and the first gate valve 20 is opened, allowing the magnetic slurry to enter the grouting pipe.

[0030] Example 3

[0031] like Figure 5 As shown, the connecting pipe 13 is threadedly connected to the sealing pipe 4, which facilitates the separation of the sealing head and the grouting head.

[0032] Example 4

[0033] like Figure 6As shown, a pressure plate 16 is fixedly installed on the connecting pipe 13, and a sealing gasket is installed on one side of the pressure plate 16. When the connecting pipe 13 is installed on the sealing pipe 4, the pressure plate 16 is in close contact with one side of the sealing pipe 4, which can prevent the magnetic slurry from flowing out along the threaded connection.

[0034] Working principle: During use, the sealing head and grouting head are first installed. After each use, the sealing head remains in the grouting pipe for sealing and is not recycled. Once installed, the sealing head is inserted into the grouting pipe. Simultaneously, the magnetic grout, after being thoroughly stirred in the grouting tank 1, enters the grouting pump 2 through the feed pipe. The grouting pump 2 pressurizes the magnetic grout and delivers it to the grouting head through the discharge pipe. The first gate valve 20 is closed, and the second gate valve 21 is opened, allowing the magnetic grout to enter the annular groove 6 through the second feed pipe 18. The air bladder 7 gradually inflates, completely sealing the inner wall of the grouting pipe. Then, the first gate valve 20 is opened, and the second gate valve 21 is closed, allowing the magnetic grout to enter the cavity of the connecting pipe 13 through the first feed pipe 17, and then enter the installation cavity 8 through the first material hole 12, before finally entering the grouting pipe through the central hole 5 for grouting.

[0035] After grouting is completed, rotate the connecting pipe 13 to remove it from the sealing pipe 4. During the process of the connecting pipe 13 moving out of the sealing pipe 4, the spring 10 releases its elasticity and pushes the moving groove 11 to move, thereby re-sealing the connecting hole 9, thus preventing the magnetic grout in the annular groove 6 from flowing back, and thus achieving the purpose of continuously sealing the grouting pipe.

Claims

1. A magnetic grout injector for coal mines, characterized in that, include: The grouting assembly comprises a grouting tank (1), a grouting pump (2), and a grouting component (3). The grouting pump (2) is equipped with an inlet pipe and an outlet pipe. The inlet pipe is connected to the grouting tank (1), and the outlet pipe is connected to the grouting component (3). The grouting component (3) includes a sealing head and a grouting head. The sealing head includes a sealing tube (4). The sealing tube (4) has a central hole (5) and an annular groove (6) on its outside. An airbag (7) is installed inside the annular groove (6). An installation cavity (8) is also provided inside the central hole (5). Multiple connecting holes (9) are provided inside the installation cavity (8). The connecting holes (9) communicate with the annular groove (6). A spring (10) is installed inside the cavity. A movable groove (11) is fixedly installed at one end of the spring (10). The movable groove (11) is slidably and sealed to the mounting cavity (8). A first material hole (12) is opened on the side of the movable groove (11) connected to the spring (10). The grouting head includes a connecting pipe (13). The connecting pipe (13) is installed inside the central hole (5). A portion of the connecting pipe (13) extends into the mounting cavity (8) and is inserted into the movable groove (11). A cavity (14) is opened on the wall of the connecting pipe (13). A plurality of second material holes (15) are opened on the connecting pipe (13). All of the plurality of second material holes (15) are connected to the cavity (14).

2. The magnetic grout injector for coal mines according to claim 1, characterized in that, The connecting pipe (13) is equipped with a first feed pipe (17) and a second feed pipe (18). The first feed pipe (17) is connected to the cavity of the connecting pipe (13), and the second feed pipe (18) is connected to the cavity (14). A three-way connector (19) is installed at one end of the connecting pipe (13), and the three-way connector (19) is connected to the discharge pipe and the second feed pipe (18).

3. A magnetic grout injector for coal mines according to claim 2, characterized in that, A first gate valve (20) and a second gate valve (21) are respectively installed on the first feed pipe (17) and the second feed pipe (18).

4. A magnetic grout injector for coal mines according to claim 1, characterized in that, The connecting pipe (13) is threadedly connected to the sealing pipe (4).

5. A magnetic grout injector for coal mines according to claim 1, characterized in that, A pressure plate (16) is fixedly installed on the connecting pipe (13). A sealing gasket is installed on one side of the pressure plate (16). When the connecting pipe (13) is installed on the sealing pipe (4), the pressure plate (16) is in close contact with one side of the sealing pipe (4).

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