A quick plugging device for a straight hole grouting port and a plugging method thereof

Abstract

When the valve body is in the closed position, the valve stem is rotated to form a circle around the valve body, and the upper end of the valve stem is fixed with the upper end of the valve stem, so that the valve stem is closed and the valve stem is closed.

Description

Technical Field

[0001] The invention belongs to the technical field of rapid hole sealing, and in particular relates to a rapid sealing device for a straight hole grouting port and a sealing method thereof. Background Art

[0002] With the gradual exploitation of coal resources, the resources of many domestic coal mines are becoming less and less. In order to increase the reserves of coal mining resources and extend the production service life of the mines, some mines gradually increase the upper limit of coal seam mining. As the upper limit increases, the coal pillar between the coal seam and the loose layer gradually decreases, revealing the problem of water damage in the roof of the thin bedrock loose layer.

[0003] Domestic engineering prevention and control methods for water and sand bursts in thin bedrock mainly include drainage of loose layers and grouting modification of the bottom of loose layers. Grouting modification of the bottom of loose layers is often carried out on the ground. According to the buried depth of the bottom of the loose layer, two methods can generally be selected: straight hole grouting modification and directional hole grouting modification. During straight hole grouting modification, the grouting pipe deep in the soil is generally separated from the grouting pipe on the ground, so that a long section of the grouting pipe is buried in the soil, which not only has a certain impact on the environment, but also increases the construction cost. In order to achieve the bottom grouting modification effect, the inside of the grouting pipe needs to be filled to prevent the slurry from surging from the grouting pipe, resulting in a decrease in the bottom slurry concentration affecting the bottom modification effect.

[0004] Therefore, we propose a rapid plugging device for a straight hole grouting port and a plugging method thereof to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that during straight hole grouting renovation, the grouting pipe deeply embedded in the soil is generally separated from the grouting pipe on the ground, so that a long section of the grouting pipe is buried in the soil, which not only has a certain impact on the environment, but also increases the construction cost. In order to achieve the bottom grouting renovation effect, the inside of the grouting pipe needs to be filled to avoid the slurry from surging from the grouting pipe, resulting in a decrease in the bottom slurry concentration affecting the bottom renovation effect. A quick sealing device and a sealing method for a straight hole grouting port are proposed.

[0006] The lockhole that is formed on the upper end of the gear train is formed, and the lockhole that is formed on the lower end of the gear train is formed. The lockhole that is formed on the lower end of the gear train is formed. The lockhole that is formed on the lower end of the gear train is formed.

[0007] As a preferred embodiment of the present invention, a vertical movable groove is opened inside the upper end of the second grouting pipe, and the rotating push block, limit plate, limit block, and L-shaped plug-in plate are all arranged inside the vertical movable groove.

[0008] As a preferred embodiment of the present invention, an annular groove is provided inside the upper end of the second grouting pipe, and the annular groove is connected to the vertical movable groove, and the arc-shaped movable plate is arranged inside the annular groove.

[0009] As a preferred embodiment of the present invention, through grooves are provided on both the front and rear sides of the upper end of the second grouting pipe, and the through grooves are connected to the annular grooves, and the size of the elastic block matches the through grooves.

[0010] As a preferred embodiment of the present invention, a slot is provided inside the L-shaped plug-in board, the limit block is inserted into the slot, and slots are provided inside the upper and lower ends of the disc plate, and the two elastic blocks are matched with the two slots respectively.

[0011] As a preferred embodiment of the present invention, a sealing plate is hingedly connected to the lower surface of the connecting pipe via a hinge shaft, and four sealing plates are arranged in a circumferential array. A convex block is provided on the circumferential outer surface of the upper end of the second grouting pipe, and four convex blocks are provided. The lower ends of the four convex blocks are respectively in contact with the upper surfaces of the four sealing plates.

[0012] As a preferred embodiment of the present invention, a method for quickly sealing a straight hole grouting port specifically comprises the following steps:

[0013] Step 1: Place the grouting pipe 1 and the grouting pipe 2 connected by the connecting pipe into the pre-drilled position, so that the grouting pipe goes deep downward, and after the lower end of the grouting pipe 2 is inserted into the coal mine floor at the drilled position through the pointed cone, the grouting pump is started at this time. The grouting pump sends the slurry into the interior of the grouting pipe 2 through the grouting pipe 1 and the connecting pipe, and then flows into the interior of the drilled hole through the through hole of the grouting pipe 2 to achieve the effect of water drive and sand fixation;

[0014] After the grouting is completed, the lower end of the L-shaped plug-in plate no longer abuts against the grouting pipe 2, causing the L-shaped plug-in plate to lose its limiting and fixing effect on the grouting pipe 2, and the toothed plate also moves to mesh with the gear.

[0015] The third step is to move the first and second connecting pipes vertically upward so that the connecting pipe and the second connecting pipe are separated. When the connecting pipe moves vertically upward, the toothed plate at its lower end first meshes with the gear, causing the gear to rotate, and then drives the valve stem, the disc plate and the rotating push block to rotate vertically ninety degrees, so that the disc plate closes the upper end of the grouting pipe two, completing the rapid sealing of the grouting port, and preventing the slurry under the grouting pipe two from overflowing from the upper end of the grouting pipe two, resulting in a reduction in the slurry concentration at the lower end, affecting the water drive and sand fixation effect below. When the disc plate closes the grouting pipe two, the rotating push block also rotates to a horizontal state, and during its rotation, it pushes the limit plate in the direction away from the L-shaped plug-in plate, so that the limit block moves out from the inside of the L-shaped plug-in plate, and then the limit plate loses its limiting and fixing effect on the L-shaped plug-in plate, and the limit plate will also push the arc movable plate when moving. The movable plate moves, causing the elastic block to move to the through groove, and then one end of the elastic block is inserted into the card slot of the disc plate through the through groove, thereby strengthening the fixing effect of the disc plate and preventing the slurry from surging upward and pushing the disc plate open, thereby improving the sealing effect of the disc plate. At the same time, when the tooth plate is still in meshing with the gear, the connecting pipe will drive the connecting block to move upward, and will not drive the L-shaped plug-in plate to move upward, thereby preventing jamming. After the tooth plate moves upward and disengages from the gear, the connecting block abuts against the inner top wall of the L-shaped plug-in plate. At this time, when the connecting pipe continues to move upward, it will drive the L-shaped plug-in plate to move upward and out of the grouting pipe 2, and then the connecting pipe and the structure of its inner bottom are separated from the grouting pipe 2 as a whole, completing the disassembly work of the grouting pipe 2 and the grouting pipe 1, so that the grouting pipe 1 can be recycled again, reducing the waste of resources and reducing the working cost.

[0016] After the grouting pipe 1 and the connecting pipe are moved out of the borehole as a whole, the new grouting pipe 2 is placed directly below the connecting pipe. At this time, the grouting pipe 1 and the connecting pipe are vertically inserted into the interior of the grouting pipe 2. When the lower end of the L-shaped plug-in plate is inserted into the bottom of the vertical movable groove of the grouting pipe 2, the toothed plate drives the gear to rotate, so that the disc plate is in a vertical state, and then the interior of the grouting pipe 2 is opened to facilitate subsequent grouting work. Then the grouting pipe 1 and the connecting pipe are rotated horizontally to move the protrusion of the L-shaped plug-in plate into the interior of the annular groove. At the same time, its protrusion abuts against the inner wall of the grouting pipe 2, so that the connecting pipe is fixedly installed in the interior of the grouting pipe 2, completing the fixed connection between the grouting pipe 1 and the grouting pipe 2, and then the grouting and sealing work of the next borehole can be carried out.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) By rotating the connecting pipe, the protruding portion of the L-shaped plug-in plate rotates from the inside of the annular groove to the inside of the vertical movable groove, and then the connecting pipe moves upward, driving the tooth plate to move upward, and then the tooth plate drives the gear, valve stem and disc plate to rotate, so that the disc plate rotates 90 degrees to seal the upper end of the grouting pipe 2, realizing rapid sealing of the grouting pipe mouth, preventing the slurry at the bottom from flowing out of the grouting pipe 2, and improving the quality of grouting transformation;

[0019] (2) By setting a rotating push block, when the valve stem drives the rotating push block to rotate, the rotating push block can push the limit plate away from the L-shaped plug-in plate, so that the limit block is pushed out from the inside of the L-shaped plug-in plate. At this time, the L-shaped plug-in plate can be moved out from the inside of the grouting pipe 2, and then the connecting pipe can be detached from the inside of the grouting pipe 2, so that the grouting pipe 1 of this length from the upper end of the grouting pipe 2 to the ground can be taken out and reused, which reduces the impact on the environment and also reduces the construction cost;

[0020] (3) By setting the arc-shaped movable plate and the elastic block, after the limit plate is pushed by the rotating push block, the limit plate can push the arc-shaped movable plate to move, so that the elastic block moves to the through groove, and then the elastic block part is moved out of the through groove and inserted into the slot of the disc plate, thereby improving the fixing effect of the disc plate and further improving the sealing effect of the disc plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 An exploded view of the present invention;

[0024] Figure 3 It is a front sectional perspective view of the connecting pipe of the present invention;

[0025] Figure 4 It is a front sectional perspective view of the grouting pipe 2 of the present invention;

[0026] Figure 5 This is a first top-sectional perspective view of the grouting pipe 2 of the present invention;

[0027] Figure 6 A first top-down perspective view of the present invention as a whole;

[0028] Figure 7 This is a second top-sectional perspective view of the grouting pipe 2 of the present invention;

[0029] Figure 8 It is a second top sectional perspective view of the entire present invention.

[0030] In the figure: 1. Grouting pipe 1; 2. Connecting pipe; 3. Grouting pipe 2; 4. Valve stem; 5. Disc plate; 6. Gear; 7. Rotating push block; 8. Tooth plate; 9. Limit plate; 10. Limit block; 11. L-shaped plug-in plate; 12. Slot; 13. Connecting block; 14. Arc-shaped movable plate; 15. Elastic clamping block; 16. Clamping groove; 17. Vertical movable groove; 18. Annular groove; 19. Through groove; 20. Sealing plate; 21. Protrusion; 22. Compression spring. DETAILED DESCRIPTION

[0031] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all 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.

[0032] Example:

[0033] See also Figure 1 - Figure 8 As shown, a rapid plugging device for a straight hole grouting port comprises a grouting pipe 1, the lower end of the grouting pipe 1 is fixedly connected to the grouting pipe 2 3 through a connecting pipe 2, a disc plate 5 is rotatably installed inside the upper end of the grouting pipe 2 3 through a valve stem 4, and the circumferential surfaces of the left and right ends of the valve stem 4 are provided with gears 6 and rotating push blocks 7, and the two gears 6 are meshed and connected with tooth plates 8. When the grouting pipe 1 is connected to the grouting pipe 2 3 through the connecting pipe 2, the tooth plates 8 do not mesh with the gears 6, but have a certain distance from the gears 6. The upper ends of the two tooth plates 8 are fixedly connected to the lower end of the connecting pipe 2, so that when the connecting pipe 2 rotates horizontally or moves vertically, it can smoothly drive the tooth plates 8 to rotate or move synchronously;

[0034] The two upper end parts of the two limit plates 9 are provided with a limit plate 9 on one side, and one side of the upper end of the two limit plates 9 is movably installed in the interior of the grouting pipe 3 by a compression spring 22. After the L-shaped plug-in plate 11 is plugged into the interior of the grouting pipe 3, the compression spring 22 squeezes the limit plate 9 in the direction of the L-shaped plug-in plate 11, thereby improving the fixing effect of the L-shaped plug-in plate 11 in the interior of the grouting pipe 3. The other side of the upper end of the two limit plates 9 is connected with an L-shaped plug-in plate 11 through a limit block 10. The setting of the limit block 10 can clamp the L-shaped plug-in plate 11, so that the L-shaped plug-in plate 11 cannot move in the vertical direction, further improving the fixing effect of the L-shaped plug-in plate 11 in the interior of the grouting pipe 3. The other side of the two L-shaped plug-in plates 11 is abutted with an arc-shaped movable plate 14. The interior of the arc-shaped movable plate 14 is provided with an elastic block 15. The upper end of the connecting block 13 is provided inside the upper end of the 11, and the upper end of the connecting block 13 is fixedly connected to the lower end of the connecting pipe 2. The setting of the connecting block 13 makes it possible for the connecting pipe 2 to first drive the connecting block 13 to move upward when driving the L-shaped plug-in plate 11 to move out of the grouting pipe 2 3. Then, after the connecting block 13 abuts against the upper end of the L-shaped plug-in plate 11, the L-shaped plug-in plate 11 will be driven to move upward. When the connecting pipe 2 drives the connecting block 13 to move upward without driving the L-shaped plug-in plate 11 to move upward, the toothed plate 8 can drive the gear 6 to rotate, so that the gear 6 drives the valve stem 4 and the rotating push block 7 to rotate, and after the limit block 10 is pushed out from the inside of the L-shaped plug-in plate 11, the L-shaped plug-in plate 11 completely loses its fixing effect inside the grouting pipe 2 3. At this time, the connecting pipe 2 can smoothly move the L-shaped plug-in plate 11 out of the inside of the grouting pipe 2 3.

[0035] The lower surface of the connecting pipe 2 is hinged with a sealing plate 20 through a hinge shaft, and four sealing plates 20 are arranged in a circumferential array. The circumferential outer surface of the upper end of the grouting pipe 2 3 is provided with a protrusion 21, and four protrusions 21 are provided. The lower ends of the four protrusions 21 are respectively in contact with the upper surfaces of the four sealing plates 20. The bottom corner of the sealing plate 20 close to the grouting pipe 2 3 and the top corner of the protrusion 21 close to the connecting pipe 2 are both arc-shaped, so that when the connecting pipe 2 is inserted into the grouting pipe 2 3, the sealing plate 20 can pass downward through the protrusion 21, and when the connecting pipe 2 is in contact with the protrusion 21, the sealing plate 20 can pass downward through the protrusion 21. When the dynamic sealing plate 20 moves upward, the protrusion 21 can push the sealing plate 20 open. The Shudie sealing plate 20 has a certain inclination angle to prevent the sealing plate 20 from being caught by the gear 6 and affecting the disengagement of the connecting pipe 2. The setting of the sealing plate 20 makes the connection between the lower end of the connecting pipe 2 and the upper end of the grouting pipe 2 3 tighter, preventing the slurry injected around the grouting pipe 2 3 from entering the connection gap between the connecting pipe 2 and the grouting pipe 2 3, and bonding the connecting pipe 2 and the grouting pipe 2 3 together, so that the connecting pipe 2 can be smoothly detached from the grouting pipe 2 3;

[0036] It should be noted that the elastic block 15 is composed of a plug-in block and an ejection spring. The plug-in block is movably installed inside the arc-shaped movable plate 14 through the ejection spring, and the left and right sides of the outside of the plug-in block are both arc-shaped, so that the plug-in block can smoothly move in and out of the arc-shaped movable plate 14, and then will not affect the movement of the arc-shaped movable plate 14, so that the plug-in block can be smoothly plugged into the card slot 16 of the disc plate 5, thereby improving the sealing effect of the disc plate 5. The two sets of gears 6, the rotating push block 7, the tooth plate 8, the limit plate 9, the limit block 10, the L-shaped plug-in plate 11, the connecting block 13, the arc-shaped movable plate 14 and the elastic block 15 are all arranged in a circular array inside the connecting pipe 2 or the grouting pipe 2 3, so that when the connecting pipe 2 rotates horizontally, it can smoothly drive its internal structure to move.

[0037] A vertical movable groove 17 is provided inside the upper end of the grouting pipe 2 3, and the rotating push block 7, the limit plate 9, the limit block 10, and the L-shaped plug-in plate 11 are all arranged inside the vertical movable groove 17. An annular groove 18 is provided inside the upper end of the grouting pipe 2 3, and the annular groove 18 is communicated with the vertical movable groove 17. The arc-shaped movable plate 14 is arranged inside the annular groove 18. The arrangement of the vertical movable groove 17 and the annular groove 18 enables the L-shaped plug-in plate 11 to be plugged into or detached from the vertical movable groove 17. The rotating push block 7 can rotate inside the vertical movable groove 17, and then the rotating push block 7 can smoothly push the limit plate 9 inside the vertical movable groove 17, and the grouting pipe 2 Through grooves 19 are provided on the front and rear sides of the upper end of the slurry pipe 2 3, and the through grooves 19 are connected to the annular groove 18. The size of the elastic block 15 matches the through grooves 19. A slot 12 is provided inside the L-shaped plug-in plate 11, and the limit block 10 is inserted into the inside of the slot 12. Slots 16 are provided inside the upper and lower ends of the disc plate 5, and the two elastic blocks 15 match the two slots 16 respectively. The setting of the through grooves 19 and the slots 16 can enable part of the elastic block 15 to move out of the through grooves 19 after the arc-shaped movable plate 14 drives the elastic block 15 to move, and be inserted into the inside of the slots 16 of the disc plate 5, thereby enhancing the stability of the disc plate 5 and improving the sealing effect of the disc plate 5.

[0038] Example 2:

[0039] Please refer to Figure 1 - Figure 6 As shown, the present invention also discloses a method for quickly plugging a straight hole grouting port, which specifically includes the following steps:

[0040] Step 1: Place the grouting pipe 1 and the grouting pipe 2 3 connected together by the connecting pipe 2 into the pre-drilled position, so that the grouting pipe goes deep downward, and after the lower end of the grouting pipe 2 3 is plugged into the coal mine floor at the end hole position through the pointed cone, the grouting pump is started at this time. The grouting pump sends the slurry into the interior of the grouting pipe 2 3 through the grouting pipe 1 1 and the connecting pipe 2, and then flows into the interior of the drilled hole through the through hole of the grouting pipe 2 3 to achieve the effect of water drive and sand fixation;

[0041] After the grouting is completed, because the lower end of the grouting pipe 2 3 is inserted into the coal mine floor through the pointed cone part, it has a certain fixing effect. At this time, when the grouting pipe 1 drives the connecting pipe 2 to rotate horizontally, the connecting pipe 2 will not drive the grouting pipe 2 3 to rotate, but will only rotate horizontally inside the grouting pipe 2 3. When the connecting pipe 2 rotates horizontally, the connecting pipe 2 can synchronously drive the L-shaped plug-in plate 11 and the tooth plate 8 to rotate horizontally. When the L-shaped plug-in plate 11 is rotated as a whole to the inside of the vertical movable groove 17, the protrusion at the lower end of the L-shaped plug-in plate 11 no longer abuts against the grouting pipe 2 3, so that the L-shaped plug-in plate 11 loses its limiting and fixing effect on the grouting pipe 2 3, and at the same time the tooth plate 8 also moves to engage with the gear 6;

[0042] After the cam 11 is in the closed position, the gear 6 is rotated and the gear 6 is rotated, so that the gear 6 is rotated and the gear 6 is rotated. When the tooth plate 8 is still in meshing state with the gear 6, the connecting pipe 2 will drive the connecting block 13 to move upward without driving the L-shaped plug-in plate 11 to move upward, thereby preventing the occurrence of a stuck phenomenon. After the tooth plate 8 moves upward and disengages from the gear 6, the connecting block 13 abuts against the inner top wall of the L-shaped plug-in plate 11, and when the connecting pipe 2 continues to move upward, it will drive the L-shaped plug-in plate 11 to move upward out of the grouting pipe 2 3, and then the connecting pipe 2 and the structure of its inner bottom will be separated from the grouting pipe 2 3 as a whole, completing the disassembly work of the grouting pipe 2 3 and the grouting pipe 1.

[0043] After the grouting pipe 1 and the connecting pipe 2 are moved out of the borehole as a whole, the new grouting pipe 2 3 is placed directly below the connecting pipe 2. At this time, the grouting pipe 1 and the connecting pipe 2 are vertically inserted into the interior of the grouting pipe 2 3. When the lower end of the L-shaped plug-in plate 11 is inserted into the bottom of the vertical movable groove 17 of the grouting pipe 2 3, the tooth plate 8 drives the gear 6 to rotate, so that the disc plate 5 is in a vertical state, and then the interior of the grouting pipe 2 3 is opened to facilitate subsequent grouting work. Then the grouting pipe 1 and the connecting pipe 2 are rotated horizontally so that the protrusion of the L-shaped plug-in plate 11 moves into the interior of the annular groove 18. At the same time, its protrusion abuts against the inner wall of the grouting pipe 2 3, so that the connecting pipe 2 is fixedly installed in the interior of the grouting pipe 2 3, completing the fixed connection between the grouting pipe 1 and the grouting pipe 2 3, and then the grouting and sealing work can be performed on the next borehole.

[0044] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A rapid plugging device for a straight hole grouting port, comprising a grouting pipe (1), the lower end of which is fixedly connected to a grouting pipe (3) via a connecting pipe (2), characterized in that: A disc plate (5) is rotatably mounted inside the upper end of the grouting pipe (3) through the valve stem (4), and gears (6) and rotating push blocks (7) are provided on the circumferential surfaces of the left and right ends of the valve stem (4). The two gears (6) are meshedly connected with tooth plates (8), and the upper ends of the two tooth plates (8) are fixedly connected to the lower end of the connecting pipe (2). A limit plate (9) is provided on one side of the two rotating push blocks (7), and one side of the upper ends of the two limit plates (9) is compressed by a compression spring (22 ) is movably installed inside the grouting pipe (3), the other side of the upper end of the two limit plates (9) is plugged with an L-shaped plug plate (11) through a limit block (10), the other side of the two L-shaped plug plates (11) is abutted with an arc-shaped movable plate (14), the interior of the arc-shaped movable plate (14) is provided with an elastic card block (15), the upper end of the L-shaped plug plate (11) is provided with a connecting block (13), and the upper end of the connecting block (13) is fixedly connected to the lower end of the connecting pipe (2); A vertical movable groove (17) is provided inside the upper end of the second grouting pipe (3), and the rotating push block (7), the limit plate (9), the limit block (10), and the L-shaped plug-in plate (11) are all arranged inside the vertical movable groove (17); An annular groove (18) is provided inside the upper end of the second grouting pipe (3), and the annular groove (18) is connected to the vertical movable groove (17), and the arc-shaped movable plate (14) is arranged inside the annular groove (18); A through groove (19) is provided on both the front and rear sides of the upper end of the second grouting pipe (3), and the through groove (19) is connected to the annular groove (18), and the size of the elastic block (15) matches the through groove (19).

2. A rapid plugging device for a straight hole grouting port according to claim 1, characterized in that: A slot (12) is provided inside the L-shaped plug board (11), the limit block (10) is plugged into the slot (12), and a card slot (16) is provided inside the upper and lower ends of the disc plate (5), and the two elastic card blocks (15) are matched with the two card slots (16) respectively.

3. A rapid plugging device for a straight hole grouting port according to claim 1, characterized in that: The lower surface of the connecting pipe (2) is hinged with a sealing plate (20) via a hinge shaft, and four sealing plates (20) are arranged in a circumferential array. The circumferential outer surface of the upper end of the second grouting pipe (3) is provided with a protrusion (21), and four protrusions (21) are provided. The lower ends of the four protrusions (21) are respectively in contact with the upper surfaces of the four sealing plates (20).

4. A method for quickly plugging a straight hole grouting port, characterized in that: The specific steps include: Step 1: Place the grouting pipe 1 (1) and the grouting pipe 2 (3) connected together by the connecting pipe (2) into the pre-drilled position, so that the grouting pipe goes deep downward, and after the lower end of the grouting pipe 2 (3) is plugged into the coal mine floor at the end hole position through the pointed cone, the grouting pump is started, and the grouting pump sends the slurry into the interior of the grouting pipe 2 (3) through the grouting pipe 1 (1) and the connecting pipe (2), and then flows into the interior of the drilled hole through the through hole of the grouting pipe 2 (3), thereby achieving the effect of water driving and sand consolidation; Step 2: After the grouting is completed, because the lower end of the grouting pipe 2 (3) is inserted into the coal mine floor through the pointed cone part, it has a certain fixing effect. At this time, when the grouting pipe 1 (1) drives the connecting pipe (2) to rotate horizontally, the connecting pipe (2) will not drive the grouting pipe 2 (3) to rotate, but will only rotate horizontally inside the grouting pipe 2 (3). When the connecting pipe (2) rotates horizontally, the connecting pipe (2) can synchronously drive the L-shaped plug-in plate (11) and the tooth plate (8) to rotate horizontally. When the L-shaped plug-in plate (11) rotates as a whole to the inside of the vertical movable groove (17), the protrusion at the lower end of the L-shaped plug-in plate (11) no longer abuts against the grouting pipe 2 (3), so that the L-shaped plug-in plate (11) loses its limiting and fixing effect on the grouting pipe 2 (3), and at the same time, the tooth plate (8) also moves to engage with the gear (6); Step 3: At this time, the grouting pipe 1 (1) and the connecting pipe (2) can be moved vertically upward, so that the connecting pipe (2) is separated from the grouting pipe 2 (3). When the connecting pipe (2) moves vertically upward, the tooth plate (8) at its lower end first engages with the gear (6), so that the gear (6) rotates, and then drives the valve stem (4), the disc plate (5) and the rotating push block (7) to rotate vertically by ninety degrees, so that the disc plate (5) closes the upper end of the grouting pipe 2 (3), completing the rapid sealing work of the grouting port, and preventing the slurry below the grouting pipe 2 (3) from flowing out of the grouting port. The upper end of the second pipe (3) overflows, resulting in a decrease in the slurry concentration at the lower end, which affects the water-discharging and sand-fixing effect below. When the disc plate (5) closes the grouting pipe (3), the rotating push block (7) also rotates to a horizontal state. During its rotation, the limit plate (9) is pushed away from the L-shaped plug-in plate (11), so that the limit block (10) moves out from the inside of the L-shaped plug-in plate (11), and then the limit plate (9) loses its limiting and fixing effect on the L-shaped plug-in plate (11). In addition, the limit plate (9) also pushes the arc-shaped movable plate (14) when it moves. The elastic block (15) moves to the through groove (19), and then one end of the elastic block (15) is inserted into the groove (16) of the disc plate (5) through the through groove (19), thereby strengthening the fixing effect of the disc plate (5), preventing the slurry from surging upward to push the disc plate (5) away, and improving the sealing effect of the disc plate (5). At the same time, when the tooth plate (8) is still in the meshing state with the gear (6), the connecting pipe (2) will drive the connecting block (13) to move upward, and will not drive the L-shaped plug-in plate (11) to move upward, thereby avoiding the occurrence of a stuck phenomenon. After the tooth plate (8) moves upward and disengages from the gear (6), the connecting block (13) abuts against the inner top wall of the L-shaped plug-in plate (11). At this time, when the connecting pipe (2) continues to move upward, it will drive the L-shaped plug-in plate (11) to move upward out of the grouting pipe 2 (3), and then the connecting pipe (2) and the structure of its inner bottom are separated from the grouting pipe 2 (3) as a whole, completing the disassembly work of the grouting pipe 2 (3) and the grouting pipe 1 (1), so that the grouting pipe 1 (1) can be recycled again, reducing the waste of resources and reducing the working cost; Step 4: After the grouting pipe 1 (1) and the connecting pipe (2) are removed from the borehole as a whole, the new grouting pipe 2 (3) is placed directly below the connecting pipe (2). At this time, the grouting pipe 1 (1) and the connecting pipe (2) are vertically inserted downward into the interior of the grouting pipe 2 (3). When the lower end of the L-shaped plug-in plate (11) is inserted into the bottom of the vertical movable groove (17) of the grouting pipe 2 (3), the tooth plate (8) drives the gear (6) to rotate, so that the disc plate (5) is in a vertical state, and then the grouting pipe is inserted downward. The interior of the second (3) is opened to facilitate the subsequent grouting work, and then the grouting pipe (1) and the connecting pipe (2) are rotated horizontally, so that the protruding portion of the L-shaped plug plate (11) moves into the interior of the annular groove (18), and at the same time, its protruding portion abuts against the inner wall of the grouting pipe (3), so that the connecting pipe (2) is fixedly installed inside the grouting pipe (3), completing the fixed connection between the grouting pipe (1) and the grouting pipe (3), and then the grouting and sealing work can be carried out on the next borehole.

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