An automatic repairing device for cracks or leaks in a dam

Abstract

The application discloses a kind of automatic repairing devices of dam crack or leak, including isolation zone, storage tank and medium diffusion pipe;Isolation zone is set in dam front and leave spacing with dam to form separation area, wherein, isolation zone includes multiple interval distribution fixed column and set between adjacent two fixed column retractable water baffle, water baffle can be folded in bottom and can be raised to form isolation zone with fixed column;Multiple medium diffusion pipe is equipped with and multiple medium diffusion pipe is evenly distributed in separation area, the top of medium diffusion pipe is closed and the pipe on water is evenly distributed with medium diffusion hole;Storage tank is used to store the fluid medium that makes water solidification, storage tank is communicated with the lower end of each medium diffusion pipe by pipeline.This application's dam crack or leak repairing device, can construct protection dam quickly in dam front, to provide sufficient time for dam repair or rescue, to avoid greater disaster from happening.

Description

Technical Field

[0001] This invention relates to the field of water conservancy disaster prevention facilities technology, specifically to an automatic repair device for cracks or leaks in dam bodies. Background Technology

[0002] Reservoirs, hydropower stations, and dams are commonly used water conservancy facilities. Through reinforced concrete dams, they impound, divert, and change the direction of water flow in natural bodies of water, allowing the water to move according to human needs. For example, reservoirs impound a portion of the water for domestic and industrial use; hydropower stations impound water and change its direction, directing the water flow through turbine generators to generate electricity; and flood and tide control dams impound water to prevent it from flowing behind the dam and causing loss of life and property.

[0003] Dams are so crucial that their quality must be guaranteed not only during construction but also through continuous maintenance and inspection after completion. However, maintenance and inspection measures cannot completely prevent cracks or leaks from appearing in the dam structure. Once cracks or leaks appear, they will significantly weaken the dam's strength. Taking a reservoir dam as an example, if there is water tens or even hundreds of meters deep on one side of the dam, the powerful water pressure on a cracked or leaky dam can easily cause a breach in the location of the crack or leak within a short period of time, leading to the complete collapse of the dam (i.e., a dam failure). The resulting floodwaters will create a flood peak downstream, causing significant loss of life and property to people in downstream areas.

[0004] Therefore, timely detection of cracks or leaks is crucial for mitigating the risk of dam failure. Generally, once cracks or leaks are discovered in the dam body, they are repaired, often using mortar injection. However, in certain situations, the appearance of cracks or leaks in the dam body may indicate an imminent risk of dam failure, a highly critical situation where conventional repair methods are ineffective. Even with timely flood discharge (taking a reservoir as an example), time is required, and dam failure could occur at any moment.

[0005] Therefore, a dam repair device is proposed, which can quickly form a protective dam on one side of the dam when cracks or leaks are found in the dam body and endanger the safety of the dam body. Summary of the Invention

[0006] To address this issue, the present invention provides an automatic repair device for cracks or leaks in dam bodies.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automatic repair device for cracks or leaks in a dam body includes an isolation zone, a storage tank, and a medium diffusion pipe. The isolation zone is positioned in front of the dam body and spaced apart to form a separation area. The isolation zone includes multiple spaced-apart fixed posts and retractable water-retaining plates positioned between adjacent fixed posts. The fixed posts are vertically positioned with their lower ends fixed to the bottom of the water. The water-retaining plates can be retracted at the bottom and raised to form the isolation zone with the fixed posts. The distances of each fixed post from the dam body are equal or unequal, and the spacing between adjacent fixed posts is equal or unequal. Because the riverbed is not... The riverbed is flat, and some riverbeds are not suitable for setting up fixed posts. Therefore, the positions of the fixed posts are arranged according to the actual situation, which will form straight or curved isolation zones. That is, the isolation zones can be straight or curved. The medium diffusion pipes are set vertically and the lower ends of the medium diffusion pipes are fixed to the bottom of the water. There are multiple medium diffusion pipes, and the multiple medium diffusion pipes are evenly distributed in the separation area. The top of the medium diffusion pipe is closed, and the pipe body located in the water is provided with evenly distributed medium diffusion holes. The storage tank is used to store the fluid medium that solidifies the water. The storage tank is connected to the lower ends of each medium diffusion pipe through a pipe.

[0009] Furthermore, the retractable baffle includes a motor, a steel wire rope, a fixed pulley, and multiple folding plates connected by a hinge assembly. The motor is located at the bottom of the fixed column, the fixed pulley is located at the top of the fixed column, one end of the steel wire rope is wound around a rope winch connected to the motor shaft of the motor, and the other end passes through the internal space of the fixed column, out of the top of the fixed column, around the fixed pulley, extends downward and is fixed to the uppermost folding plate.

[0010] Furthermore, multiple isolation zones are provided, and the multiple isolation zones are distributed at intervals in front of the dam body. The separation area is formed between adjacent isolation zones, and the medium diffusion pipes are uniformly distributed in the separation area.

[0011] Furthermore, the fixed column is a telescopic column.

[0012] Furthermore, the medium diffusion tube is a telescopic tube.

[0013] Furthermore, vertical grooves are provided on the left and right sides of the fixed column, and sliders are provided at the left and right ends of the folding plate, with the sliders extending into the grooves.

[0014] Furthermore, a vertically extending protrusion is provided in the middle of the side of the fixed column away from the dam body, and the folding plate is located between the protrusions of two adjacent fixed columns.

[0015] Furthermore, the fixed column is a hydraulically powered telescopic column.

[0016] Furthermore, the medium diffusion tube is a mechanical multi-stage telescopic tube.

[0017] The present invention has the following advantages:

[0018] When cracks or leaks appear in the dam body, posing an imminent risk of breach or dam collapse, the repair device is immediately activated. First, the water-retaining plate is raised, forming an isolation zone between the plate and the fixed pillars. Then, liquid nitrogen from the storage tank is released at a controlled rate. The liquid nitrogen flows through pipelines into the medium diffusion pipe and exits through the diffusion holes. The liquid nitrogen causes the water in the isolated area to freeze into an ice wall. This ice wall, pressed tightly against the dam body, uses the healthy area of ​​the dam to resist the pressure of the remaining water in the reservoir. Simultaneously, the ice wall blocks the danger zone, preventing the pressure of the remaining water in the reservoir from directly impacting the danger zone, thus preventing breach or dam collapse in the danger zone. The dam crack or leak repair device of this application can quickly construct a protective dam in front of the dam body, providing sufficient time for dam repair or emergency response, thereby preventing larger disasters.

[0019] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1 A top view schematic diagram of a dam body crack or hole repair device provided in an embodiment of the present invention;

[0023] Figure 2 This is a side view of a dam crack or leak repair device provided in an embodiment of the present invention, showing the repair of cracks.

[0024] Figure 3 A schematic diagram of the fixing column and water-retaining plate of a dam body crack or hole repair device provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of a water-retaining plate for a dam body crack or hole repair device provided in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the structure of a medium diffusion pipe for a dam body crack or hole repair device provided in an embodiment of the present invention;

[0027] Figure 6 A top view of the positional relationship between the double-U-shaped fixing column and the folding plate of a dam body crack or hole repair device provided in an embodiment of the present invention (the water-retaining plate is not unfolded);

[0028] Figure 7 A top view of the positional relationship between the double-U-shaped fixing column and the folding plate of a dam body crack or hole repair device provided in an embodiment of the present invention (the water-retaining plate has been fully unfolded);

[0029] Figure 8 A top view of the positional relationship between the convex-shaped fixing column and the folding plate of a dam body crack or hole repair device provided in an embodiment of the present invention (the water-retaining plate is not unfolded);

[0030] Figure 9 A top view of the positional relationship between the convex-shaped fixing column and the folding plate of a dam body crack or hole repair device provided in an embodiment of the present invention (the water-retaining plate has been fully unfolded);

[0031] Figure 10 A schematic diagram showing the fixing column and medium diffusion pipe of a dam body crack or hole repair device provided in an embodiment of the present invention retracted into the water.

[0032] Figure 11 The diagram shows the state of a dam body crack or leak repair device provided in an embodiment of the present invention, which has two isolation zones for repairing leaks.

[0033] In the diagram: 1. Dam body; 2. Isolation zone; 3. Storage tank; 4. Medium diffusion pipe; 5. Crack; 6. Ice wall; 7. Separated area; 8. Vulnerability; 9. Fixed column; 10. Water-retaining plate; 11. Waterproof shell; 12. Electric motor; 13. Rope winch; 14. Wire rope; 15. Fixed pulley; 16. Folding plate; 17. Slide groove; 18. Sliding block; 19. Hinge assembly; 20. Protrusion; 21. Medium diffusion hole. Detailed Implementation

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0035] This embodiment provides a device for repairing cracks or leaks in a dam body, referred to simply as a dam body repair device. When cracks or leaks are discovered in the dam body and endanger its safety (meaning a dam failure may occur at any time), a protective dam can be quickly formed on the front side of the dam body (the water-retaining side). It should be noted that the dam body repair device of this embodiment is essentially a dam failure prevention measure; therefore, it is also called a temporary protective dam system, dam failure prevention system, temporary protective dam device, dam failure prevention device, etc.

[0036] The core of the dam repair device in this embodiment is as follows: An isolation zone is set up on the front side of the dam. This isolation zone separates a small portion of the massive water body from the dam, allowing it to contact the dam. This small portion of water is then physically transformed into a solid ice wall or chemically transformed into a solid crystal. The ice wall or solid crystal acts as a protective dam (the ice wall is a temporary dam with a short lifespan; the solid crystal is a semi-permanent dam, lasting N times longer than the ice wall, but will eventually be dismantled). This entire section (or block) contacts the dam body, providing sufficient support to the protective dam from the cracks or leaks. The protective dam protects cracks or leaks from the immense pressure of the water, thus preventing breaches and subsequent dam collapses. Once the protective dam is formed, there is ample time for flood discharge. After the water level drops, permanent repairs can be carried out on the cracks and leaks, or other methods of dam repair can be applied.

[0037] like Figure 1-5As shown, the dam repair device in this embodiment includes fixed columns 9, retractable baffles 10, a storage tank 3, and a medium diffusion pipe 4. A row of fixed columns 9 is arranged on the front side of the dam body 1, with the fixed columns 9 spaced apart in the same row. The fixed columns 9 are generally vertically arranged, with a height not lower than the highest water level. Retractable baffles 10 are arranged between adjacent fixed columns 9 in the same row. In the retracted state, the baffles 10 are retracted to the bottom, without affecting or reducing the impact on water surface activity. In the extended state, the upper edge of the baffles 10 can be raised to a certain height, for example, to a position level with the top surface of the dam body 1, level with the water surface, or level with the top of the fixed column 9. Multiple fixed columns 9 and multiple sets of retractable water-retaining plates 10 constitute a lifting isolation zone 2. When the water-retaining plates 10 are raised to a specified height or design height, the multiple fixed columns 9 and multiple sets of water-retaining plates 10 form the isolation zone 2. The isolation zone 2 and the dam body 1 form a separation area 7. This separation area 7 and other areas of the reservoir contain water at the same height. The storage tank 3 is used to store the fluid medium that solidifies the water. Solidifying the water refers to freezing the water at low temperature or combining the water with chemical substances to form solid crystals. In this embodiment, the fluid medium is liquid nitrogen. Exemplarily, the storage tank 3 is set on the bank or buried underground (i.e., a submerged storage tank 3). Multiple medium diffusion pipes 4 are evenly arranged at the bottom of the partition area 7. The medium diffusion pipes 4 are generally vertically arranged with a blind end at the top, and medium diffusion holes 21 are evenly distributed along the pipe body, thus achieving uniform diffusion of liquid nitrogen. The medium diffusion pipes 4 have a certain height, generally at the same height as the fixed column 9, dam 1, or water surface, ensuring sufficient contact between the water and liquid nitrogen within the partition area 7, thereby forming the entire ice wall 6. A large and complete ice wall 6 is more advantageous in resisting water pressure using healthy areas and in preventing water pressure from acting on dangerous areas. Furthermore, the medium diffusion pipes 4 can also be used as anchoring structures inserted into the ice wall 6, further improving the pressure resistance of the ice wall 6. The storage tank 3 is connected to the medium diffusion pipes 4 via a pipeline. It should be noted that the introduction of liquid nitrogen from the storage tank 3 into the medium diffusion pipes 4 needs to be controlled. Valves can be installed on the pipeline, and a pump can be installed between the storage tank 3 and the pipeline; this is existing technology and will not be elaborated further.

[0038] When cracks 5 or leaks 8 appear in dam body 1, and a breach or dam collapse is imminent, the dam repair device is immediately activated. First, the baffle plate 10 is raised, and then liquid nitrogen in storage tank 3 is released at a certain speed. The liquid nitrogen flows along the pipeline into the medium diffusion pipe 4 and exits through the medium diffusion hole 21. The liquid nitrogen causes the water in the isolation zone 7 to freeze into an ice wall 6. The entire ice wall 6 is close to dam body 1, using the healthy area of ​​dam body 1 (the part without cracks 5 or leaks 8 and at a certain distance from them) to resist the pressure of the remaining water in the reservoir. At the same time, the entire ice wall 6 blocks the danger zone (the part where cracks 5 or leaks 8 are located), preventing the pressure of the remaining water in the reservoir from directly acting on the danger zone, thus preventing a breach or dam collapse in the danger zone. It can be seen that the purpose of the isolation zone 2 is to concentrate the use of liquid nitrogen within the isolation zone 7, reducing the diffusion of liquid nitrogen to other areas of the reservoir. Therefore, the isolation zone 2 basically does not bear unilateral water pressure.

[0039] In a preferred embodiment of this invention, the fixing post 9 is a telescopic post. Before deployment, the fixing post 9 can be concealed within the riverbed, further reducing its environmental impact. Figure 10 As shown. For example, the telescopic column is a hydraulic multi-stage telescopic column, which uses hydraulic power to achieve multi-stage telescopic movement; the pressure fluid is water, which can be sourced locally and does not require a separate storage tank. The telescopic column's extension and retraction are achieved through hydraulic pumps, valves, and other structures. It should be noted that the telescopic column is a commonly used structure in the prior art, so its structure will not be described in detail.

[0040] In a preferred embodiment of this invention, the medium diffusion pipe 4 is a telescopic pipe. Before deployment, the medium diffusion pipe 4 can be concealed within the riverbed to further reduce its environmental impact. Figure 10 As shown. For example, the telescopic tube is a mechanical multi-stage telescopic tube.

[0041] In an optional embodiment of this example, the retractable baffle 10 has a roller shutter-type structure, except that the retractable part is located at the bottom. In a preferred embodiment of this example, the retractable baffle 10 has a folding structure, including a plurality of folding plates 16 connected by hinge components 19. For example, as shown... Figure 6 and 7 As shown, vertical grooves 17 (i.e., double-sided concave columns of the fixed columns 9) are provided on the opposite side of two adjacent fixed columns 9 in the same row. Slider blocks 18 extending into the grooves 17 are provided at the ends of the folding plates 16. This folding-unfolding structure is similar to the folding doors of old-fashioned buses. Taking the folding plates 16 in the folded state as an example, the width direction of the folding plates 16 is almost parallel to the front-back direction (with the isolation strip 2 in front of the dam body 1 as the directional reference). The sliders 18 are located at the left and right ends of the folding plates 16, but the sliders 18 of different folding plates 16 are all located at the front (or rear) end of each folding plate 16 in the folded state. For example, as... Figure 8 and 9 As shown, each fixed column 9 has a vertically extending protrusion 20 (i.e., the fixed column 9 is a convex column) in the middle of the side away from the dam body 1, and the folding plate 16 is located between the protrusions 20 of the two fixed columns 9.

[0042] In an optional embodiment of this example, the retractable baffle 10 is driven by a motor 12. In a preferred embodiment of this example, as... Figure 3 and 4 As shown, the motor 12 is located at the bottom of the fixed column 9 and is designed to be waterproof (for example, a waterproof shell 11 is provided at the bottom of the fixed column 9, and the motor 12 is located in the waterproof shell 11). A fixed pulley 15 is provided at the top of the fixed column 9. The motor shaft of the motor 12 is connected to the winch 13. One end of the steel wire rope 14 is wound and fixed on the winch shaft of the winch 13, and the other end passes through the space inside the fixed column 9, out of the top of the fixed column 9, around the fixed pulley 15, extends downward and is fixed to the uppermost folding plate 16. When the motor 12 rotates forward (or reverses), the folding plate 16 is pulled up by winding the steel wire rope 14, thereby forming a water-blocking plate 10 by multiple folding plates 16. After the steel wire rope 14 is released, the folding plate 16 folds back down to the bottom of the water under the action of gravity. Generally, all motors 12 within the same isolation zone 2 are controlled by a single controller to achieve simultaneous raising and lowering of all baffles 10. This also enables the installation of only one motor 12 within a fixed column 9. By using a reducer, coupling, etc., two winches 13 are driven to work synchronously, saving one motor 12 within each fixed column 9, thereby reducing costs.

[0043] In a preferred embodiment of this example, such as Figure 11 As shown, a second row of fixed columns 9 is also provided, and retractable water-blocking plates 10 are also provided between the second row of fixed columns 9. The second row of fixed columns 9 and water-blocking plates 10 (i.e., the second isolation zone 2) and the first row of fixed columns 9 and water-blocking plates 10 (i.e., the first isolation zone 2) form a second separation zone 7. The bottom of the second separation zone 7 is also evenly distributed with medium diffusion pipes 4. When a hole 8 appears in the dam body 1, there may be no water above the hole 8, but the water level at a location farther from the dam body 1 is still higher than the hole 8. At this time, the ice wall 6 (the first ice wall 6) formed in the first separation zone 7 cannot stop the water from flowing towards the hole 8 and out of the hole 8. By forming a second ice wall 6 in the second separation zone 7, a stepped ice wall 6 with a higher distance and a lower distance is formed, which increases the overall height of the ice wall 6 and prevents the water in the reservoir from continuously flowing out of the hole 8, thus solving the problem of the hole 8 becoming larger, breaching, and collapsing due to long-term erosion. In addition, a third isolation zone 2, a fourth isolation zone 2, and so on can be set up according to the actual situation.

[0044] The automatic repair device for cracks or holes in the dam body provided in this embodiment involves a large amount of work and requires the storage of a certain amount of consumables (such as liquid nitrogen or other substances). Therefore, it needs to be constructed before cracks 5 or holes 8 appear in the dam body 1. In other words, it needs to be constructed in advance to prevent problems before they occur, and it belongs to the defensive project.

[0045] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automatic repair device for cracks or leaks in a dam body, characterized in that, The system includes an isolation zone, a storage tank, and media diffusion pipes. The isolation zone is positioned in front of the dam body and spaced apart to form a separation area. The isolation zone comprises multiple spaced-apart fixed posts and retractable baffles positioned between adjacent fixed posts. The fixed posts are vertically oriented with their lower ends fixed to the bottom of the water. The baffles can be retracted at the bottom and raised to form the isolation zone with the fixed posts. The distances from each fixed post to the dam body are equal or unequal, and the spacing between adjacent fixed posts is equal or unequal. The media diffusion pipes are vertically oriented with their lower ends fixed to the bottom of the water. Multiple media diffusion pipes are evenly distributed within the separation area. The top of each media diffusion pipe is closed, and evenly distributed media diffusion holes are provided on the pipe body above the water. The storage tank stores a fluid medium for solidifying water, and the storage tank is connected to the lower ends of each media diffusion pipe via a pipeline.

2. The automatic repair device for cracks or leaks in the dam body according to claim 1, characterized in that, The retractable water baffle includes a motor, a steel wire rope, a fixed pulley, and multiple folding plates connected by a hinge assembly. The motor is located at the bottom of the fixed column, the fixed pulley is located at the top of the fixed column, one end of the steel wire rope is wound around a rope winch connected to the motor shaft of the motor, and the other end passes through the internal space of the fixed column, out of the top of the fixed column, around the fixed pulley, extends downward and is fixed to the uppermost folding plate.

3. The automatic repair device for cracks or leaks in the dam body according to claim 1, characterized in that, Multiple isolation zones are provided, and the multiple isolation zones are distributed at intervals in front of the dam body. The separation area is formed between adjacent isolation zones, and the medium diffusion pipes are uniformly distributed in the separation area.

4. The automatic repair device for cracks or leaks in the dam body according to claim 1, characterized in that, The fixed column is a telescopic column.

5. The automatic repair device for cracks or leaks in the dam body according to claim 1, characterized in that, The medium diffusion tube is a telescopic tube.

6. The automatic repair device for cracks or leaks in the dam body according to claim 2, characterized in that, The fixed column is provided with vertical grooves on its left and right sides, and the folding plate is provided with sliders at its left and right ends, with the sliders extending into the grooves.

7. The automatic repair device for cracks or leaks in the dam body according to claim 2, characterized in that, A vertically extending protrusion is provided in the middle of the side of the fixed column away from the dam body, and the folding plate is located between the protrusions of two adjacent fixed columns.

8. The automatic repair device for cracks or leaks in the dam body according to claim 4, characterized in that, The fixed column is a hydraulically powered telescopic column.

9. The automatic repair device for cracks or leaks in the dam body according to claim 5, characterized in that, The medium diffusion tube is a mechanical multi-stage telescopic tube.

Images