Dam downstream face leakage repairing device

Abstract

The invention discloses a dam downstream face leakage repairing device, and belongs to the technical field of dam crack sealing. The grouting device comprises a grouting pipe and a conical head installed on the grouting pipe, a rotating assembly is arranged in the conical head, a sealing piece is fixedly arranged on the side wall of one end of the rotating assembly, an adjusting assembly is arranged in the rotating assembly, and a magnetic field assembly is further arranged in the conical head; compared with traditional stable pressure grouting, pulse type continuous grouting is adopted, so that the diffusion range of grout can be enlarged, and the groutability of rock mass can be improved; and thus, cracks with large internal spaces, small cracks and other shapes can be fully grouted, the compactness of the grout can be increased, and the repairing effect of the cracks is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of dam crack sealing, and in particular relates to a device for repairing leakage on the downstream surface of a dam. Background Art

[0002] The downslope of the dam is the slope facing the downstream water flow, which mainly supports the dam body, guides the water flow and serves as a drainage channel. However, after a long period of use, due to the influence of geographical and natural conditions, design and construction defects, improper management and material aging, cracks will appear on the downslope of the dam, causing the dam body to start leaking, which will in turn affect the structural strength of the dam and may cause the dam to collapse.

[0003] The existing crack repair device on the lower slope of the dam first drills holes crosswise along both sides of the crack. After drilling, the debris in the hole is cleaned with high-pressure water, and then the hole is cleaned with high-pressure gas. After cleaning, a grouting pipe is inserted into the hole and sealed, and then grouting is performed into the hole through the grouting pipe. The grouting material can be polyurethane slurry. The polyurethane slurry flows from the hole into the crack. The polyurethane material expands when it encounters water in the crack to achieve the effect of repairing the crack.

[0004] Although the above-mentioned crack repair device on the lower slope of the dam has been widely used in reality, it has many defects, as follows: During the grouting process on the lower slope of the dam, most repair devices use stable pressure for grouting. However, due to the large internal space of the crack or the re-development of the crack, when using stable pressure for grouting, it may be impossible to fill the crack, resulting in insufficient slurry density, which in turn affects the crack repair effect.

[0005] Therefore, we propose a leakage repair device for the downstream surface of the dam to solve the above-mentioned problems. Summary of the Invention

[0006] In view of the problem in the prior art that the internal space of the cracks is too large or the cracks develop again, using stable pressure for grouting may result in the phenomenon of failure to inject solid slurry, resulting in insufficient slurry density and affecting the crack repair effect. The purpose of the present invention is to provide a leakage repair device for the downstream surface of the dam.

[0007] To solve the above problems, the present invention adopts the following technical solutions: a device for repairing leakage on the downstream face of a dam, comprising a grouting pipe and a conical head mounted on the grouting pipe, a rotating assembly disposed inside the conical head, a sealing member fixedly disposed on a side wall of one end of the rotating assembly, an adjusting assembly disposed inside the rotating assembly, and a magnetic field assembly disposed inside the conical head; The outer circumferential wall of the sealing member is tightly fitted and slidably arranged with the side wall of the inner cavity of the conical head; The adjusting assembly includes a mounting shaft mounted on the rotating assembly, a gear is fixedly mounted on the side wall of one end of the mounting shaft, a plurality of tooth plates are mounted in the inner cavity of the rotating assembly, and the tooth plates and the gears are meshed with each other, a circular plate is fixedly mounted on the side walls of one end of the plurality of tooth plates, a screw is fixedly mounted on the outer wall of the circular plate facing away from the tooth plate, a screw sleeve is mounted in the inner cavity of the rotating assembly, the screw is penetrated and arranged on the screw sleeve, and the screw and the screw sleeve are threadedly connected, a sliding sleeve at one end of the screw away from the circular plate is provided with a magnetic core, the magnetic core can slide axially on the screw but cannot rotate radially on the screw.

[0008] Furthermore, the grouting pipe includes a pipe body, a connecting port is fixedly installed on the side wall of one end of the pipe body, a pair of pipes are opened inside the pipe body, a guide port is fixedly installed at the opening of the pipe, and a threaded column is fixedly installed on the side wall of the other end of the pipe body.

[0009] Furthermore, the conical head includes a conical head body, an interlayer is provided inside the conical head body, the magnetic field component is fixedly arranged in the inner cavity of the interlayer, a plurality of slurry outlets are provided on the circumferential outer wall of the conical head body, and the slurry outlets are connected to the inner cavity of the conical head body, and a threaded barrel is fixedly installed on the side wall of the conical head body facing the tube body, and a threaded connection is made between the threaded barrel and the threaded column.

[0010] Furthermore, the rotating assembly includes a pair of mounting brackets fixedly mounted on the inner cavity side wall of the conical head body, a rotating shaft is rotatably mounted on the two mounting brackets, the adjustment assembly is arranged inside the rotating shaft, and a blade is fixedly mounted on the other end side wall of the mounting shaft.

[0011] Furthermore, the sealing component includes a connecting shaft fixedly mounted on a side wall at one end of the rotating shaft, and a sealing shaft is fixedly mounted on a side wall at one end of the connecting shaft away from the rotating shaft.

[0012] Furthermore, the sealing shaft includes a shaft body, and a plurality of slurry guiding grooves are provided on the circumferential outer wall of the shaft body, and a communication relationship can be formed between the slurry guiding grooves and the slurry outlet.

[0013] Furthermore, the magnetic field assembly includes a mounting seat fixedly mounted in the inner cavity of the interlayer, and an electromagnetic coil is fixedly mounted on the mounting seat.

[0014] Furthermore, the rotating shaft includes a rotating shaft body, a gear is arranged in the inner cavity of the rotating shaft body, a screw sleeve is fixedly installed on the side wall of the inner cavity of the rotating shaft body, a plurality of through holes are opened on the circumferential outer wall of the rotating shaft body, the mounting shaft is rotatably installed in the inner cavity of the through holes, a plurality of sliding grooves are opened on the side wall of the inner cavity of the rotating shaft body, and tooth plates are respectively slidably installed in the inner cavities of the plurality of sliding grooves.

[0015] Furthermore, the rotating magnetic field generated by the electromagnetic coil can drive the magnetic core to rotate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Compared with traditional steady pressure grouting, the pulse continuous grouting used in this application can increase the diffusion range of the slurry and the injection capacity of the rock mass, and thus can fully grout cracks with larger internal spaces, small cracks, and other shapes, which can increase the density of the slurry and enhance the crack repair effect.

[0017] 2. Compared with the direct use of traditional pulse grouting pumps to achieve continuous pulse grouting, which requires higher output power, this application can achieve better grouting effects while keeping the power of the grouting pump basically unchanged, thus achieving energy-saving and environmental protection effects.

[0018] 3. The pulsed continuous grouting used in this application can continuously impact the polyurethane slurry that is about to expand in the shallow part of the crack, reduce the amount of expansion of the polyurethane slurry in the shallow part of the crack, and thus alleviate the problem of blockage of the grouting delivery path, which is conducive to improving the density of the slurry and achieving better sealing and repair effects.

[0019] 4. This application utilizes a rotating magnetic field to adjust the angle of the blades, so that the rotating components and seals can achieve different rotational speeds, thereby achieving continuous pulse grouting at different frequencies, which can be applied to seal and repair cracks of different sizes and shapes.

[0020] 5. When the grouting pressure is unstable, the electromagnetic coil is used to generate a rotating magnetic field to adjust the angle of the blade, so that the rotation speed of the rotating component and the seal matches the grouting pressure to achieve a better grouting sealing repair effect. In this process, the angle of the blade can be dynamically adjusted, which has better flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A magnified view of point A; Figure 3 Schematic diagram of disassembly of the grouting pipe and conical head of the present invention Figure 1 ; Figure 4 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 5 for Figure 4 Enlarged view of point B; Figure 6 Schematic diagram of disassembly of the grouting pipe and conical head of the present invention Figure 2 ; Figure 7 for Figure 6 Enlarged view of point C; Figure 8 Schematic diagram of the three-dimensional structure of the sealing shaft of the present invention; Figure 9 is a schematic diagram of the three-dimensional structure of the magnetic field assembly of the present invention; Figure 10 Schematic diagram of the installation position of the rotating assembly of the present invention; Figure 11 It is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention; Figure 12 is a schematic diagram of the three-dimensional structure of the adjustment component of the present invention; Figure 13 Schematic diagram of the connection between the tooth plate and the gear of the present invention.

[0022] In the figure: 1. Grouting pipe; 11. Pipe body; 12. Connecting port; 13. Pipeline; 14. Threaded column; 15. Guide port; 2. Conical head; 21. Conical head body; 22. Interlayer; 23. Slurry outlet; 24. Threaded barrel; 3. Magnetic field assembly; 31. Mounting seat; 32. Electromagnetic coil; 4. Rotating assembly; 41. Mounting frame; 42. Rotating shaft; 421. Rotating shaft body; 422. Through hole; 423. Slide groove; 43. Blade; 5. Adjusting assembly; 51. Mounting shaft; 52. Gear; 53. Tooth plate; 54. Circular plate; 55. Screw; 56. Screw sleeve; 57. Magnetic core; 6. Seal; 61. Connecting shaft; 62. Sealing shaft; 621. Shaft body; 622. Slurry guide groove. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] In order to solve the problem that the internal space of the crack is too large or the crack develops again, when using stable pressure for grouting, it may be impossible to inject solid slurry, resulting in insufficient density of slurry, which will affect the sealing and repair effect of the crack. Figure 1 - Figure 13 As shown: like Figure 1As shown, a leakage repair device for the downstream surface of a dam includes a grouting pipe 1 and a conical head 2 installed on the grouting pipe 1. In the process of repairing the crack, a hole is first drilled along the crack. After the drilling is completed, the hole is cleaned. After the cleaning is completed, the grouting pipe 1 is inserted into the hole and sealed to prevent back leakage during grouting. After the above operations are completed, polyurethane slurry is injected into the interior of the grouting pipe 1 through a grouting pump (not shown in the figure, the grouting pump is a prior art and will not be described in detail). The polyurethane slurry will flow from the hole into the gap. Since polyurethane has the property of expanding when it comes into contact with water, when the polyurethane slurry comes into contact with water in the crack, the polyurethane slurry immediately expands and seals the crack, thereby achieving the crack repair effect. When the grouting pipe 1 is inserted into the hole, the conical head 2 is provided to protect the internal components.

[0025] like Figure 4 As shown, a rotating component 4 is provided inside the conical head 2, and a seal 6 is fixedly provided on the side wall of one end of the rotating component 4. When high-pressure grouting is performed, the high-pressure slurry will flow through the grouting pipe 1 and the conical head 2. At this time, the high-pressure slurry will drive the rotating component 4 and the seal 6 to rotate synchronously. The seal 6 cooperates with the conical head 2 during the rotation process to achieve continuous pulse grouting. Compared with traditional stable pressure grouting, it can fully grout cracks with larger internal spaces, small cracks and other shapes, increase the density of the slurry, and enhance the crack repair effect. An adjusting component 5 is provided inside the rotating component 4, and a magnetic field component 3 is also provided inside the conical head 2. The magnetic field component 3 can generate a rotating magnetic field, and the rotating magnetic field is used to drive the adjusting component 5 to operate, which is used to adjust the rotation speed of the rotating component 4 and the seal 6, thereby achieving pulse grouting of different frequencies to adapt to grouting and repairing cracks of different shapes and depths.

[0026] like Figure 4 As shown, the circumferential outer wall of the seal 6 and the side wall of the inner cavity of the conical head 2 are tightly fitted and slidably arranged, the purpose of which is to prevent the polyurethane slurry from flowing out of the gap between the circumferential outer wall of the seal 6 and the side wall of the inner cavity of the conical head 2, so as to achieve continuous pulse grouting.

[0027] like Figure 2-Figure 4As shown, the grouting pipe 1 includes a pipe body 11, and a connecting port 12 is fixedly installed on the side wall of one end of the pipe body 11. The connecting port 12 can be connected to the pipeline 13 on the grouting pump (not shown in the figure) to introduce the polyurethane slurry into the interior of the pipe body 11. A pair of pipelines 13 are opened in the interior of the pipe body 11, and a guide port 15 is fixedly installed at the opening of the pipeline 13. An electric wire (not shown in the figure) is arranged in the inner cavity of the guide port 15 and the pipeline 13, and the electric wire (not shown in the figure) is electrically connected to the magnetic field component 3 to provide electric energy for the magnetic field component 3 to generate a rotating magnetic field. A threaded column 14 is fixedly installed on the side wall of the other end of the pipe body 11, and the threaded column 14 is used to be threadedly connected to the conical head 2, so that the grouting pipe 1 and the conical head 2 are set to be detachable, which is convenient for transportation and subsequent maintenance.

[0028] like Figure 4 As shown, the conical head 2 includes a conical head body 21, an interlayer 22 is provided inside the conical head body 21, and the magnetic field component 3 is fixedly arranged in the inner cavity of the interlayer 22. A plurality of slurry outlets 23 are provided on the circumferential outer wall of the conical head body 21, and the slurry outlets 23 are connected with the inner cavity of the conical head body 21. During the grouting process, when the high-pressure slurry flows through the inner cavity of the conical head body 21, it will drive the rotating component 4 and the seal 6 to rotate synchronously. During the rotation, the seal 6 will intermittently block the slurry outlet 23. When the slurry outlet 23 is blocked by the seal 6, the pressure in the inner cavity of the conical head body 21 increases. When the seal 6 continues to rotate and no longer blocks the slurry outlet 23, the locally pressurized slurry will be ejected from the slurry outlet 23. When the seal 6 rotates continuously, the pulsed grouting can be achieved. Figure 6-Figure 7 As shown, a threaded barrel 24 is fixedly installed on the side wall of the conical head main body 21 facing the pipe body 11, and the threaded barrel 24 is threadedly connected to the threaded column 14. Through the cooperation between the threaded barrel 24 and the threaded column 14, the grouting pipe 1 and the conical head 2 can be connected.

[0029] like Figure 5 and Figure 9-10 As shown, the rotating assembly 4 includes a pair of mounting frames 41 fixedly mounted on the side wall of the inner cavity of the conical head body 21, and a rotating shaft 42 is rotatably mounted on the two mounting frames 41. The adjusting assembly 5 is arranged inside the rotating shaft 42, and a plurality of blades 43 are fixedly mounted on the adjusting assembly 5. During grouting, the high-pressure slurry will drive the blades 43, the rotating shaft 42, the adjusting assembly 5 and the seal 6 to rotate together, so as to realize the subsequent continuous pulse grouting operation.

[0030] like Figure 5 As shown, the sealing member 6 includes a connecting shaft 61 fixedly mounted on a side wall of one end of the rotating shaft 42 , and a sealing shaft 62 fixedly mounted on a side wall of the connecting shaft 61 away from the rotating shaft 42 .

[0031] like Figure 8-Figure 9 As shown, the sealing shaft 62 includes a shaft body 621 , and a plurality of slurry guiding grooves 622 are provided on the circumferential outer wall of the shaft body 621 , and the slurry guiding grooves 622 can form a communication relationship with the slurry outlet 23 .

[0032] Specifically, when high-pressure grouting is performed, high-pressure slurry will flow through the inner cavity of the pipe body 11 and the conical head body 21. At this time, the high-pressure slurry will act on the blade 43, thereby driving the adjustment component 5, the rotating shaft 42, the connecting shaft 61 and the shaft body 621 to rotate synchronously. During the rotation of the shaft body 621, when the slurry guide groove 622 is aligned with the slurry outlet 23, the slurry guide groove 622 and the slurry outlet 23 are in a connected state, so that the slurry can be sprayed from the slurry guide groove 622 and the slurry outlet 23 into the crack to grout the crack. Repair, the shaft body 621 continues to rotate, and when the slurry guide groove 622 and the slurry outlet 23 are misaligned, the slurry guide groove 622 and the slurry outlet 23 are in a blocked state. At this time, the slurry will be temporarily accumulated in the inner cavity of the slurry guide groove 622, and the pressure of the slurry guide groove 622 will increase in a short time. As the shaft body 621 continues to rotate, when the slurry guide groove 622 and the slurry outlet 23 are in a connected state again, the locally pressurized slurry will be ejected at a faster speed, and so on and so forth, to achieve continuous pulse grouting.

[0033] Compared with traditional steady pressure grouting, pulse continuous grouting can increase the diffusion range of slurry and the groutability of rock mass, and thus can fully grout cracks with large internal space, small cracks and other shapes, increase the density of slurry, and enhance the repair effect of cracks. In addition, while achieving better grouting effect, the present application can also make the power of grouting pump (not shown in the figure) basically unchanged. If the traditional pulse grouting pump (not shown in the figure) is directly used to achieve continuous pulse grouting, a higher output power is required. Therefore, the present application can achieve energy saving and environmental protection while achieving continuous pulse grouting.

[0034] Since polyurethane slurry has the property of expanding when it comes into contact with water, it begins to expand when it comes into contact with water in the crack. If stable pressure grouting is used, there may be a part of the expanded polyurethane material in the shallow part of the crack, which will cause the grouting delivery path to be partially blocked, and the deep crack may not be grouted thoroughly, resulting in insufficient density of the slurry. However, if continuous pulse grouting is used, it can continuously impact the polyurethane slurry that is about to expand in the shallow part of the crack, reduce the amount of expansion of the polyurethane slurry in the shallow part of the crack, and thus alleviate the problem of the grouting delivery path being blocked, which is conducive to improving the density of the slurry and achieving better sealing and repair effects.

[0035] In order to solve the problem that the rotation speed of the rotating assembly 4 and the sealing member 6 cannot match the grouting pressure when the grouting pressure is unstable, as shown in FIG. Figure 8 - Figure 13 As shown: like Figure 8-Figure 9 As shown, the magnetic field assembly 3 includes a mounting base 31 fixedly installed in the inner cavity of the interlayer 22, and an electromagnetic coil 32 is fixedly installed on the mounting base 31. When power is supplied to the electromagnetic coil 32 through an electric wire, the electromagnetic coil 32 can generate a rotating magnetic field, which can drive the adjustment assembly 5 to operate, and is used to adjust the angle of the blade 43, thereby controlling the rotation speed of the rotating assembly 4 and the seal 6, thereby realizing pulse grouting of different frequencies.

[0036] like Figure 11 As shown, the rotating shaft 42 includes a rotating shaft body 421 , a plurality of through holes 422 are formed on the circumferential outer wall of the rotating shaft body 421 , and a plurality of sliding grooves 423 are formed on the side wall of the inner cavity of the rotating shaft body 421 .

[0037] like Figure 12-13 As shown, the specific connection relationship of the adjustment component 5 is as follows: the adjustment component 5 includes a mounting shaft 51 mounted on the rotating component 4, the mounting shaft 51 is rotatably mounted in the inner cavity of the through hole 422, a gear 52 is fixedly mounted on the side wall of one end of the mounting shaft 51, a blade 43 is fixedly mounted on the side wall of the other end of the mounting shaft 51, and the gear 52 is arranged in the inner cavity of the rotating shaft body 421, a plurality of tooth plates 53 are installed in the inner cavity of the rotating component 4, and the inner cavity of the plurality of slide grooves 423 A toothed plate 53 is slidably mounted correspondingly therein, and the toothed plate 53 is meshed with the gear 52. A circular plate 54 is fixedly mounted on the side wall of one end of the plurality of toothed plates 53. A screw 55 is fixedly mounted on the outer wall of the circular plate 54 facing away from the toothed plate 53. A screw sleeve 56 is mounted in the inner cavity of the rotating assembly 4. The screw sleeve 56 is fixedly mounted on the side wall of the inner cavity of the rotating shaft body 421. The screw 55 is penetrated and arranged on the screw sleeve 56, and the screw 55 and the screw sleeve 56 are threadedly connected. Figure 5 As shown, a magnetic core 57 is provided on the sliding sleeve of one end of the screw 55 away from the circular plate 54. The magnetic core 57 can slide axially on the screw 55 but cannot rotate radially on the screw 55. The rotating magnetic field generated by the electromagnetic coil 32 can drive the magnetic core 57 to rotate.

[0038] Specifically, in the process of repairing cracks on the lower slope of the dam, different grouting pressures and pulse frequencies need to be selected for cracks of different sizes and shapes to achieve better sealing and repair effects, such as Figure 12-13As shown, the electromagnetic coil 32 is energized by an electric wire (not shown in the figure), so that the electromagnetic coil 32 generates a rotating magnetic field. Under the action of the rotating magnetic field, the magnetic core 57 starts to rotate clockwise. Since the screw 55 and the screw sleeve 56 are threadedly connected, and since the magnetic core 57 can slide axially on the screw 55 but cannot rotate radially on the screw 55, when the magnetic core 57 starts to rotate clockwise, the screw 55 will drive the circular plate 54 and the plurality of tooth plates 53 to move in a direction away from the connecting shaft 61. During the movement of the tooth plate 53, the gear 52 will carry the mounting plate 54 with it. The shaft 51 and the blade 43 rotate to adjust the angle of the blade 43, so that the rotating component 4 and the seal 6 can achieve different rotational speeds, thereby achieving continuous pulse grouting of different frequencies, which can be suitable for sealing and repairing cracks of different sizes and shapes. Similarly, when a reverse current is passed to the electromagnetic coil 32 through an electric wire (not shown in the figure), the electromagnetic coil 32 generates a reverse rotating magnetic field, thereby causing the magnetic core 57 to rotate counterclockwise, which is used to adjust the angle of the blade 43 again, or to restore the angle of the blade 43 to its initial state.

[0039] In addition, when using a grouting pump (not shown in the figure) for grouting, unstable grouting pressure may be encountered. At this time, a rotating magnetic field can be generated by the electromagnetic coil 32 to drive the magnetic core 57 to rotate, and then cooperate with the screw 55, the screw sleeve 56, the tooth plate 53, the gear 52 and the installation shaft 51 to adjust the angle of the blade 43, so that the rotation speed of the rotating component 4 and the seal 6 matches the grouting pressure to achieve a better grouting sealing repair effect. During this process, the angle of the blade 43 can be dynamically adjusted, which has better flexibility in use.

[0040] Through the above arrangement, the present application can dynamically adjust the frequency of continuous pulse grouting in real time when grouting repairs are performed on different cracks, thereby preventing the occurrence of insufficient slurry density or the expansion of cracks, which is beneficial to improving the effect of sealing and repairing cracks on the lower slope of the dam; and when the grouting pressure is unstable, the pressure of the slurry guide groove 622 can be increased or decreased by controlling the rotation speed of the rotating component 4 and the seal 6, which can also prevent the occurrence of insufficient slurry density or the expansion of cracks.

[0041] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for repairing leakage on the downstream surface of a dam, comprising a grouting pipe (1) and a conical head (2) mounted on the grouting pipe (1), characterized in that: A rotating assembly (4) is provided inside the conical head (2), a sealing member (6) is fixedly provided on a side wall of one end of the rotating assembly (4), an adjusting assembly (5) is provided inside the rotating assembly (4), and a magnetic field assembly (3) is also provided inside the conical head (2); The circumferential outer wall of the sealing member (6) is tightly fitted and slidably arranged with the side wall of the inner cavity of the conical head (2); The adjusting component (5) includes a mounting shaft (51) mounted on the rotating component (4), a gear (52) fixedly mounted on a side wall at one end of the mounting shaft (51), a plurality of tooth plates (53) mounted in the inner cavity of the rotating component (4), and the tooth plates (53) and the gear (52) are meshedly connected, a circular plate (54) is fixedly mounted on the side walls at one end of the plurality of tooth plates (53), a screw (55) is fixedly mounted on the outer wall of the circular plate (54) facing away from the tooth plate (53), a screw sleeve (56) is mounted in the inner cavity of the rotating component (4), the screw (55) is arranged on the screw sleeve (56), and the screw (55) and the screw sleeve (56) are threadedly connected, and a magnetic core (57) is provided on a sliding sleeve at one end of the screw (55) away from the circular plate (54), and the magnetic core (57) can slide axially on the screw (55) but cannot rotate radially on the screw (55).

2. A device for repairing leakage on the downstream surface of a dam according to claim 1, characterized in that: The grouting pipe (1) comprises a pipe body (11), a connecting port (12) is fixedly installed on the side wall of one end of the pipe body (11), a pair of pipes (13) are opened inside the pipe body (11), a guide port (15) is fixedly installed at the opening of the pipes (13), and a threaded column (14) is fixedly installed on the side wall of the other end of the pipe body (11).

3. A device for repairing leakage on the downstream surface of a dam according to claim 2, characterized in that: The conical head (2) comprises a conical head body (21), an interlayer (22) is provided inside the conical head body (21), a magnetic field assembly (3) is fixedly arranged in the inner cavity of the interlayer (22), a plurality of slurry outlets (23) are provided on the circumferential outer wall of the conical head body (21), and the slurry outlets (23) are connected to the inner cavity of the conical head body (21), and a threaded barrel (24) is fixedly installed on the side wall of the conical head body (21) facing the tube body (11), and a threaded connection is formed between the threaded barrel (24) and the threaded column (14).

4. A device for repairing leakage on the downstream surface of a dam according to claim 3, characterized in that: The rotating assembly (4) comprises a pair of mounting frames (41) fixedly mounted on the inner cavity side wall of the conical head body (21), a rotating shaft (42) being rotatably mounted on the two mounting frames (41), an adjusting assembly (5) being arranged inside the rotating shaft (42), and a blade (43) being fixedly mounted on the other end side wall of the mounting shaft (51).

5. A device for repairing leakage on the downstream surface of a dam according to claim 4, characterized in that: The sealing member (6) comprises a connecting shaft (61) fixedly mounted on a side wall at one end of the rotating shaft (42), and a sealing shaft (62) is fixedly mounted on a side wall at one end of the connecting shaft (61) away from the rotating shaft (42).

6. A device for repairing leakage on the downstream surface of a dam according to claim 5, characterized in that: The sealing shaft (62) comprises a shaft body (621), a plurality of slurry guide grooves (622) are provided on the circumferential outer wall of the shaft body (621), and a communication relationship can be formed between the slurry guide grooves (622) and the slurry outlet (23).

7. A device for repairing leakage on the downstream surface of a dam according to claim 4, characterized in that: The magnetic field assembly (3) comprises a mounting seat (31) fixedly mounted in the inner cavity of the interlayer (22), and an electromagnetic coil (32) is fixedly mounted on the mounting seat (31).

8. The device for repairing leakage on the downstream surface of a dam according to claim 7, characterized in that: The rotating shaft (42) includes a rotating shaft body (421), a gear (52) is arranged in the inner cavity of the rotating shaft body (421), a screw sleeve (56) is fixedly installed on the side wall of the inner cavity of the rotating shaft body (421), a plurality of through holes (422) are opened on the circumferential outer wall of the rotating shaft body (421), the installation shaft (51) is rotatably installed in the inner cavity of the through holes (422), a plurality of sliding grooves (423) are opened on the side wall of the inner cavity of the rotating shaft body (421), and tooth plates (53) are slidably installed in the inner cavities of the plurality of sliding grooves (423).

9. The device for repairing leakage on the downstream surface of a dam according to claim 7, characterized in that: The rotating magnetic field generated by the electromagnetic coil (32) can drive the magnetic core (57) to rotate.

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