Underwater dam body crack repairing equipment

Abstract

The utility model discloses underwater dam body crack repairing equipment which comprises a fixing frame, pushing wheels are arranged at the four corners of the lower end of the fixing frame, pushing handles are fixedly connected to the two corners of the upper side of the rear end of the fixing frame, and a power distribution control box is fixedly connected to the interior of the upper side of the rear end of the fixing frame. A plurality of control buttons are arranged at the upper end of the power distribution control box, a repairing motor is fixedly connected to the rear side of the upper end of the fixing frame, through the innovative design of a conversion base and a conversion ring, rapid switching between a cylindrical filling head and a flat filling head is achieved, and the equipment can meet the repairing requirements of cracks with different widths; the cylindrical filling head is provided with a telescopic spray head and a pressure control spring mechanism, the extension length of the spray head can be automatically adjusted according to the pressure of the repairing agent, the opening number of spray holes can be controlled, self-adaptive adjustment of the spraying speed of the repairing agent is achieved, the repairing efficiency and quality are improved, and meanwhile excessive waste of the repairing agent is prevented.

Description

Technical Field

[0001] The utility model relates to the field of water conservancy project maintenance, in particular to underwater dam body crack repairing equipment. Background Art

[0002] In the field of water conservancy project maintenance, especially in the maintenance and repair of dams, crack repair is a vital task. As a large-scale water conservancy project facility, the structural integrity and stability of the dam directly affect the safety of the surrounding environment and the utilization efficiency of water resources. Due to long-term erosion by water pressure and water flow, the underwater dam body is prone to cracks. These cracks will not only reduce the structural strength of the dam, but may also cause leakage and even lead to the destruction of the dam. Therefore, timely and efficient crack repair is the focus of dam maintenance work.

[0003] Traditional underwater dam crack repair methods have many limitations. For example, artificial underwater operations are inefficient, require high technical skills from operators, and pose certain safety risks; the delivery and filling process of repair materials is difficult to accurately control, resulting in uneven repair quality; there is a lack of effective adaptive solutions for cracks of different sizes, making it difficult for repair work to fully cover various crack types.

[0004] In response to the above problems, the existing technology has conducted a series of explorations in underwater dam crack repair equipment. For example, some equipment improves the mobility and ease of operation of the equipment by integrating the propulsion system and the control unit; adopts the combination of the extrusion tube and the booster tube to achieve effective pressurization of the repair material, improve the permeability and filling effect of the repair agent; and sets filling heads of different shapes, such as cylindrical filling heads and flat filling heads, to adapt to cracks of different widths, thereby enhancing the adaptability of the equipment.

[0005] However, the existing technology still has some shortcomings. For example, the switching mechanism of the filling head is complicated and inconvenient to operate, which affects the repair efficiency; the spraying process of the repair material is difficult to adjust adaptively according to the specific situation of the crack, resulting in material waste or poor repair effect; equipment maintenance problems after repair, such as the solidification of the repair material inside the equipment, affect the long-term use of the equipment.

[0006] In view of this, developing an innovative technology that can effectively solve the above problems and improve the efficiency, quality, equipment adaptability and maintenance convenience of underwater dam crack repair has become a key issue that needs to be urgently solved in the current field of water conservancy project maintenance. Based on this background, this patented technology proposes an underwater dam crack repair device with an integrated multifunctional module, a switchable filling head system, adaptive telescopic nozzle technology, and efficient pressurization and precise injection functions, in order to provide a more efficient, accurate and safe technical solution for dam maintenance work. Utility Model Content

[0007] The main purpose of the utility model is to propose an underwater dam crack repair device, aiming to solve the problem of traditional underwater dam crack repair equipment proposed in the above background technology, that the switching mechanism of the filling head is complicated, and the repair material is difficult to adaptively adjust according to the specific situation of the crack, resulting in material waste.

[0008] In order to solve the above problems, the utility model proposes an underwater dam crack repair device, including a fixed frame, wherein pushing wheels are arranged at the four corners of the lower end of the fixed frame, and pushing handles are fixedly connected to the two corners of the upper side of the rear end of the fixed frame, a power distribution control box is fixedly connected to the interior of the upper side of the rear end of the fixed frame, and a plurality of control buttons are arranged on the upper end of the power distribution control box, a repair motor is fixedly connected to the rear side of the upper end of the fixed frame, an extrusion tube is fixedly connected to the front end of the repair motor, a feed hopper is connected to the upper end of the extrusion tube, a boosting tube is fixedly connected to the front end of the extrusion tube, a connecting screw head is threadedly connected to the front end of the boosting tube, a high-pressure connecting pipe is connected to the front end of the connecting screw head, and the other end of the high-pressure connecting pipe is connected to the repair handle through a winding reel, a cylindrical filling head is arranged on the front side of the upper end of the repair handle, and a flat filling head is arranged on the rear side of the upper end of the repair handle.

[0009] In one embodiment, the cylindrical filling head and the flat filling head are both rotatably connected to the upper end of the repair handle via a conversion seat and a conversion ring. The conversion seat is fixedly connected to the upper end of the repair handle, and the conversion ring is clamped inside the conversion seat.

[0010] In one embodiment, the conversion ring is rotatably connected to the interior of the upper end of the conversion seat, and the cylindrical filling head and the flat filling head are fixedly connected to the front and rear sides of the upper end of the conversion ring respectively.

[0011] In one embodiment, through holes are penetrated from top to bottom inside the front and rear ends of the conversion ring, and the cylindrical filling head and the flat filling head are respectively connected to the two through holes and can be connected to the inside of the repair handle through the through holes.

[0012] In one embodiment, a telescopic cylinder is connected to the center of the rear end of the conversion seat, a locking clamp is slidably connected inside the front end of the telescopic cylinder, and a locking spring is provided at the rear end of the locking clamp.

[0013] In one embodiment, the locking spring is elastically connected to the front end of the telescopic cylinder through a locking clip and protrudes inside the conversion seat. Locking holes are opened inside the center of the front and rear ends of the conversion ring, and the locking clip can be clamped in the locking hole on the rear side.

[0014] In one embodiment, the upper end of the columnar filling head is arranged in a frustum, and a cylindrical telescopic nozzle is slidably connected inside the opening of the upper end of the columnar filling head, and the opening of the telescopic nozzle is downward.

[0015] In one embodiment, the lower end of the telescopic nozzle is fixedly connected to a limit sealing ring, the lower end of the limit sealing ring is provided with a limit retaining ring, and the limit retaining ring is fixedly connected to the inner wall of the cylindrical filling head.

[0016] In one embodiment, a pressure control spring is provided at the upper end of the limit sealing ring, a spring groove is provided inside the inner wall of the upper opening of the cylindrical filling head, and the upper end of the pressure control spring is located inside the spring groove.

[0017] In one embodiment, the telescopic nozzle and the limiting sealing ring are elastically connected to the interior of the upper end opening of the cylindrical filling head through a pressure control spring, and a plurality of spray holes are opened inside the inner wall of the telescopic nozzle cylinder, and the plurality of spray holes are all located inside the front end opening of the cylindrical filling head.

[0018] Beneficial effects:

[0019] 1. Integrated multifunctional modular design: The equipment integrates push wheels, push handles, power distribution control box, repair motor, extrusion tube, feed hopper, booster tube, high-pressure connecting tube, repair handle and switchable filling head system (cylindrical filling head and flat filling head), realizing the automation of the whole process from preparation, boosting, transportation to injection of repair agent, thus improving the efficiency and flexibility of repair operation.

[0020] 2. Switchable filling head system: Through the innovative design of the conversion seat and the conversion ring, rapid switching between the cylindrical filling head and the flat filling head is achieved, so that the equipment can adapt to the repair needs of cracks of different widths, enhancing the adaptability and versatility of the equipment.

[0021] 3. Locking mechanism and enhanced stability: The combination of locking clip, locking spring and locking hole ensures the fixed position of the conversion ring, thereby ensuring a stable connection between the filling head and the repair handle, and enhancing the stability and safety of the equipment during underwater operations.

[0022] 4. Adaptive telescopic nozzle technology: The cylindrical filling head is equipped with a telescopic nozzle and a pressure-controlled spring mechanism, which can automatically adjust the extension length of the nozzle according to the pressure of the repair agent, control the number of opening nozzle holes, and realize adaptive adjustment of the repair agent injection speed, thereby improving the repair efficiency and quality and preventing excessive waste of the repair agent.

[0023] 5. Anti-solidification function: After the repair is completed, the telescopic nozzle automatically slides back into the cylindrical filling head, effectively preventing the repair agent from solidifying at the opening of the cylindrical filling head, and at the same time avoiding the repair agent from entering the gap between the limit sealing ring and the spring groove, ensuring the long-term maintenance convenience of the equipment and the normal use of the pressure control spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the crack repairing device of the utility model;

[0026] Figure 2 This is a schematic diagram of the connection structure of the repair handle of the utility model;

[0027] Figure 3 This is a schematic diagram of the conversion ring connection structure of the utility model;

[0028] Figure 4 The utility model Figure 3 The enlarged schematic diagram at A in the middle;

[0029] Figure 5 The utility model Figure 3 Enlarged schematic diagram of point B in the middle.

[0030] The following are the descriptions of the reference numerals:

[0031] 1. Fixed frame; 2. Push wheel; 3. Push handle; 4. Power distribution control box; 5. Repair motor; 6. Extrusion tube; 7. Feed hopper; 8. Booster tube; 9. Connecting screw head; 10. High-pressure connecting pipe; 11. Repair handle; 12. Cylindrical filling head; 13. Flat filling head; 14. Conversion seat; 15. Conversion ring; 16. Telescopic cylinder; 17. Locking card head; 18. Locking spring; 19. Locking hole; 20. Telescopic nozzle; 21. Limit sealing ring; 22. Limit stop ring; 23. Pressure control spring; 24. Spring groove; 25. Spray hole; 26. Reel. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0036] The utility model provides Figure 1-Figure 5The underwater dam crack repair device shown includes a fixed frame 1, and the four corners of the lower end of the fixed frame 1 are all provided with pushing wheels 2, and the two corners of the upper side of the rear end of the fixed frame 1 are fixedly connected with pushing handles 3, and the upper side of the rear end of the fixed frame 1 is fixedly connected with a power distribution control box 4, and the upper end of the power distribution control box 4 is provided with a plurality of control buttons, and the upper rear side of the fixed frame 1 is fixedly connected with a repair motor 5, and the front end of the repair motor 5 is fixedly connected with an extrusion tube 6, and the upper end of the extrusion tube 6 is connected with a feed hopper 7, and the front end of the extrusion tube 6 is fixedly connected with a boosting tube 8, and the front end of the boosting tube 8 is threadedly connected with a connecting screw head 9, and the front end of the connecting screw head 9 is connected with a high-pressure connecting tube 10, and the other end of the high-pressure connecting tube 10 is connected through a winding reel 26 There is a repair handle 11, a cylindrical filling head 12 is arranged on the front side of the upper end of the repair handle 11, and a flat filling head 13 is arranged on the rear side of the upper end of the repair handle 11. The crack repair equipment can be pushed through the two pushing handles 3 on the upper side of the rear end of the fixing frame 1, and can be moved on the ground through the four pushing wheels 2 at the lower end of the fixing frame 1. During the operation of the repair equipment, the diver holds the repair handle 11 and enters the water, and dives into the crack that needs to be repaired. At this time, since the high-pressure connecting tube 10 is wound inside the winding drum 26, the repair handle 11 can reach the repair position by pulling out the high-pressure connecting tube 10, and the winding drum 26 and the high-pressure connecting tube 10 can be replaced to change the winding drum 26. 6 and the length of the high-voltage connecting pipe 10, so as to adapt to the depth of the cracks in the dam body. The personnel on the dam body connect electricity through the distribution control box 4, and control the operation of the repair motor 5 through the control button on the upper end of the distribution control box 4. The front end of the repair motor 5 is connected to the spiral shaft through a rotating shaft, and the spiral shaft is rotatably connected to the inside of the extrusion tube 6. A repair agent is placed in the feed hopper 7. The repair agent can be made of materials such as polyurethane water-expandable sealant. The polyurethane water-expandable sealant expands when it encounters water, thereby filling the gap. The repair agent can enter the inside of the extrusion tube 6 through the feed hopper 7, and is pushed forward in the inside of the extrusion tube 6 through the spiral shaft rotating inside the extrusion tube 6. The repair agent is pressurized at the same time. After the repair agent enters the boosting tube 8 through the front end of the extrusion tube 6, since the inner diameter of the boosting tube 8 is smaller than the inner diameter of the extrusion tube 6, the repair agent will be pressurized again after entering the boosting tube 8 from the extrusion tube 6, so that the inside of the repair agent can reach the set pressure value. The high-pressure repair agent can enter the high-pressure connecting tube 10 through the connecting screw head 9 at the front end of the boosting tube 8, and enter the repair handle 11 through the high-pressure connecting tube 10. The repair handle 11 repairs the cracks in the underwater dam body through the cylindrical filling head 12 and the flat filling head 13 arranged at the upper end, and the type of repair agent can be flexibly selected according to different usage environments, and is not limited to a certain type.

[0037] Preferably, since the upper end of the cylindrical filling head 12 is arranged in a truncated cone shape and the upper end of the flat filling head 13 is arranged in a flat shape, the repair handle 11 can repair larger cracks through the cylindrical filling head 12, and can repair smaller cracks through the flat filling head 13, so that the repair equipment can better adapt to underwater dam cracks of different crack sizes.

[0038] Preferably, the repair equipment can convert the connection between the cylindrical filling head 12 and the flat filling head 13 through the conversion seat 14 and the conversion ring 15 connected between the repair handle 11 and the cylindrical filling head 12 and the flat filling head 13. By rotating the conversion ring 15, when the cylindrical filling head 12 or the flat filling head 13 is rotated to directly above the repair handle 11, the cylindrical filling head 12 or the flat filling head 13 can be connected with the repair handle 11 through the through hole set inside the conversion ring 15, ensuring that the upper end of the cylindrical filling head 12 or the flat filling head 13 can spray high-pressure repair agent, thereby repairing the cracks in the underwater dam body.

[0039] Preferably, a telescopic cylinder 16 is connected to the center of the rear end of the conversion seat 14, and a locking card 17 is slidably connected inside the front end of the telescopic cylinder 16. Locking holes 19 are opened inside the centers of the front and rear ends of the conversion ring 15, and the locking card 17 can be clamped in the locking hole 19 on the rear side. When the cylindrical filling head 12 or the flat filling head 13 rotates to the rearmost end, it is just above the repair handle 11. At this time, the locking hole 19 located at the center of the rear end of the conversion ring 15 can be engaged with the locking card 17, thereby fixing the position of the conversion ring 15, and then fixing the connection between the repair handle 11 and the cylindrical filling head 12 or the flat filling head 13, ensuring the stability of the connection between the repair handle 11 and the cylindrical filling head 12 and the flat filling head 13.

[0040] Preferably, a locking spring 18 is provided at the rear end of the locking chuck 17. In the process of mutual engagement between the locking chuck 17 and the locking hole 19, since the locking chuck 17 is elastically connected to the front end of the telescopic cylinder 16 by the locking spring 18 and protrudes inside the conversion seat 14, when the locking hole 19 is not rotated to the rearmost side, the locking chuck 17 is compressed by the outside of the conversion ring 15 inside the telescopic cylinder 16 and slides on the outer wall of the conversion ring 15. When the locking hole 19 is rotated to the rearmost side, the locking hole 19 is just located at the lock position. At the front end of the stop clamp 17, the locking clamp 17 pops out of the telescopic cylinder 16 under the action of the locking spring 18 and engages with the locking hole 19, ensuring a stable connection between the cylindrical filling head 12 and the flat filling head 13 and the repair handle 11. When the conversion ring 15 is rotated again, since the outer wall of the front end of the locking clamp 17 and the inner wall of the locking hole 19 are both hemispherical, the locking clamp 17 can be smoothly clamped out from the locking hole 19, thereby ensuring a smooth conversion between the cylindrical filling head 12 and the flat filling head 13.

[0041] Preferably, the upper end of the cylindrical filling head 12 is arranged in a frustum, and a cylindrical telescopic nozzle 20 is slidably connected to the inner opening of the upper end of the cylindrical filling head 12, and the telescopic nozzle 20 opens downward, and a plurality of spray holes 25 are opened inside the inner wall of the cylinder of the telescopic nozzle 20. The frustum-shaped cylindrical filling head 12 can be more conveniently inserted into the crack, and the telescopic nozzle 20 is connected with the interior of the cylindrical filling head 12 through the lower end opening. When the high-pressure repair agent enters the cylindrical filling head 12, the telescopic nozzle 20 slides out from the upper end of the cylindrical filling head 12 under the pressure of the repair agent, and is inserted into the deep of the crack. At the same time, the repair agent is evenly sprayed into the crack through the plurality of spray holes 25 opened inside the outer wall of the cylinder, which can not only improve the filling efficiency of the repair agent, but also improve the filling quality of the repair agent, thereby improving the repair quality.

[0042] Preferably, the lower end of the telescopic nozzle 20 is fixedly connected to a limited sealing ring 21, a limited retaining ring 22 is arranged at the lower end of the limited sealing ring 21, and the limited retaining ring 22 is fixedly connected to the inner wall of the cylindrical filling head 12, and a pressure control spring 23 is arranged at the upper end of the limited sealing ring 21, and a spring groove 24 is arranged inside the inner wall of the upper end opening of the cylindrical filling head 12, and the upper end of the pressure control spring 23 is located inside the spring groove 24. Since the telescopic nozzle 20 and the limited sealing ring 21 are elastically connected to the inner part of the upper end opening of the cylindrical filling head 12 through the pressure control spring 23, the telescopic nozzle 20 can be repaired according to the The pressure of the agent controls the length of the upper end of the cylindrical filling head 12 that slides out, thereby controlling the amount of the spray holes 25 exposed inside the cylindrical filling head 12, so that the repair equipment can control the spraying speed of the repair agent according to the pressure of the repair agent. When repairing larger cracks, high pressure is used to allow the repair agent to be quickly sprayed into the crack under high pressure to ensure that the repair agent can fill the crack in time and quickly form a whole to avoid falling off from the crack. When repairing larger cracks, low pressure is used to allow the repair agent to be slowly sprayed into the crack under low pressure to prevent the repair agent from being sprayed out of the crack and causing waste.

[0043] Preferably, after the repair is completed, the telescopic nozzle 20 can slide into the interior of the cylindrical filling head 12 again through the pressure control spring 23, thereby sealing the upper end of the cylindrical filling head 12, preventing the repair agent inside the cylindrical filling head 12 from coming into contact with the air and solidifying inside the opening at the upper end of the cylindrical filling head 12, ensuring that the cylindrical filling head 12 can be used normally, and because the multiple spray holes 25 are all located inside the front end opening of the cylindrical filling head 12, the repair will not enter the gap between the limit sealing ring 21 and the spring groove 24, ensuring that the pressure control spring 23 will not be solidified by the repair agent inside the gap between the limit sealing ring 21 and the spring groove 24, ensuring the normal use of the pressure control spring 23.

[0044] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. Underwater dam crack repair equipment, characterized in that: The invention comprises a fixed frame (1), wherein the four corners of the lower end of the fixed frame (1) are provided with pushing wheels (2), the two corners of the upper side of the rear end of the fixed frame (1) are fixedly connected with pushing handles (3), the upper side of the rear end of the fixed frame (1) is fixedly connected with a power distribution control box (4), and the upper end of the power distribution control box (4) is provided with a plurality of control buttons, the rear side of the upper end of the fixed frame (1) is fixedly connected with a repair motor (5), the front end of the repair motor (5) is fixedly connected with an extrusion tube (6), and the extrusion tube (6) The upper end is connected to a feed hopper (7), the front end of the extrusion tube (6) is fixedly connected to a boosting tube (8), the front end of the boosting tube (8) is threadedly connected to a connecting screw head (9), the front end of the connecting screw head (9) is connected to a high-pressure connecting tube (10), the other end of the high-pressure connecting tube (10) is connected to a repair handle (11) through a winding reel (26), the front side of the upper end of the repair handle (11) is provided with a cylindrical filling head (12), and the rear side of the upper end of the repair handle (11) is provided with a flat filling head (13).

2. The underwater dam crack repairing device according to claim 1, characterized in that: The cylindrical filling head (12) and the flat filling head (13) are both rotatably connected to the upper end of the repair handle (11) via a conversion seat (14) and a conversion ring (15); the conversion seat (14) is fixedly connected to the upper end of the repair handle (11); and the conversion ring (15) is clamped inside the conversion seat (14).

3. The underwater dam crack repairing device according to claim 2, characterized in that: The conversion ring (15) is rotatably connected to the interior of the upper end of the conversion seat (14), and the cylindrical filling head (12) and the flat filling head (13) are respectively fixedly connected to the front and rear sides of the upper end of the conversion ring (15).

4. The underwater dam crack repairing device according to claim 3, characterized in that: Through holes are formed in the interior of both the front and rear ends of the conversion ring (15) and the cylindrical filling head (12) and the flat filling head (13) are respectively connected to the two through holes and can be connected to the interior of the repair handle (11) through the through holes.

5. The underwater dam crack repairing device according to claim 4, characterized in that: The center of the rear end of the conversion seat (14) is connected to a telescopic cylinder (16), the front end of the telescopic cylinder (16) is slidably connected to a locking clamp (17), and the rear end of the locking clamp (17) is provided with a locking spring (18).

6. The underwater dam crack repairing device according to claim 5, characterized in that: The locking spring (18) is elastically connected to the front end of the telescopic cylinder (16) through a locking clamp (17) and protrudes from the inside of the conversion seat (14). The conversion ring (15) is provided with locking holes (19) at the center of the front and rear ends, and the locking clamp (17) can be clamped in the rear locking hole (19).

7. The underwater dam crack repairing device according to claim 4, characterized in that: The upper end of the columnar filling head (12) is arranged in the shape of a truncated cone, and a cylindrical telescopic nozzle (20) is slidably connected inside the opening of the upper end of the columnar filling head (12), and the opening of the telescopic nozzle (20) is downward.

8. The underwater dam crack repairing device according to claim 7, characterized in that: The lower end of the telescopic nozzle (20) is fixedly connected to a limit sealing ring (21), the lower end of the limit sealing ring (21) is provided with a limit stop ring (22), and the limit stop ring (22) is fixedly connected to the inner wall of the columnar filling head (12).

9. The underwater dam crack repairing device according to claim 8, characterized in that: A pressure control spring (23) is arranged at the upper end of the limit sealing ring (21), a spring groove (24) is arranged inside the inner wall of the upper opening of the columnar filling head (12), and the upper end of the pressure control spring (23) is located inside the spring groove (24).

10. The underwater dam crack repairing device according to claim 9, characterized in that: The telescopic nozzle (20) and the limiting sealing ring (21) are elastically connected to the interior of the upper opening of the columnar filling head (12) via a pressure control spring (23); a plurality of spray holes (25) are provided inside the cylindrical inner wall of the telescopic nozzle (20), and the plurality of spray holes (25) are all located inside the front end opening of the columnar filling head (12).

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