Movable cofferdam for flood prevention

Abstract

The utility model discloses a movable cofferdam for flood prevention, which relates to the technical field of movable cofferdams, and comprises a protective sleeve, an inner container is arranged in the protective sleeve, the inner container is equally divided into two ballast tanks, and a water filling nozzle is arranged on the protective sleeve and penetrates through the ballast tanks; a buffering air chamber is arranged between the inner container and the protective sleeve, an inflating opening is formed in the protective sleeve, a flexible bottom plate is arranged at the bottom of the protective sleeve, the section of the flexible bottom plate is larger than the area of the bottom of the protective sleeve, a friction increasing column is arranged at the bottom of the flexible bottom plate, a plurality of fixing holes are formed in the flexible bottom plate, and fixing screw rods are arranged in the fixing holes. A fixing screw sleeve is arranged on the fixing screw rod in a matched mode, and a spine part is arranged at one end of the fixing screw sleeve; the contact area and the friction force between the whole cofferdam and the ground are increased by arranging the flexible bottom plate and the friction increasing columns, the stability of the cofferdam is improved by matching with the fixing screw rods and the fixing screw sleeves, separation under the impact of water flow is avoided, and the cofferdam can fully play a water blocking role.

Description

Technical Field

[0001] This utility model relates to the field of movable cofferdam technology, and in particular to a movable cofferdam for flood control. Background Technology

[0002] A cofferdam is a temporary retaining structure built during the construction of hydraulic engineering projects to create permanent hydraulic facilities. Its function is to prevent water and soil from entering the construction site, allowing for drainage within the cofferdam, excavation of the foundation pit, and construction of the structure. It can also be used for emergency purposes such as flood control and disaster relief.

[0003] A utility model patent with publication number CN 219430804 U and publication date of July 28, 2023, discloses a water-injection flexible cofferdam. The cofferdam includes a bottom surface and a top surface inside the tube bag. The top surface of the tube bag is provided with a water inlet for injecting water into the tube bag, and the connection between the bottom surface and the top surface of the tube bag is provided with a drain outlet for draining water. The tube bag is provided with baffles, including a left baffle and a right baffle. One side of the left baffle and the right baffle overlaps and is fixedly connected to the middle of the top surface of the tube bag, and the other side of the left baffle and the right baffle are respectively connected to the bottom surface of the tube bag.

[0004] The utility model's support structure, an "inverted V-shaped baffle," is installed inside the pipe bag. It can block water simply by filling it with water. The structure is simple and easy to install and deploy.

[0005] However, the patent also revealed a significant problem in actual use: when the cofferdam in the patent is used in a place with relatively gentle water flow, its water-blocking effect and stability can meet the requirements. However, when the water flow is relatively rapid, and the cofferdam is placed inside the river embankment, the impact force of the water flow on the cofferdam is very large. The cofferdam only relies on the gravity after water is injected to play a stabilizing role, without other fixing mechanisms, resulting in insufficient grip. Under the strong impact of the water flow, the cofferdam can easily be washed away from the ground, thus losing its water-blocking function. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a movable cofferdam for flood control. It solves the problem that when existing cofferdams are used in situations with rapid water flow, the impact force of the water flow on the cofferdam is very large. The cofferdam only relies on the gravity of the water after it is filled to play a stabilizing role, without other fixing mechanisms, resulting in insufficient grip. Under the strong impact of the water flow, the cofferdam is easily washed away from the ground and loses its water-blocking function.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] A movable cofferdam for flood control includes a protective sleeve, an inner liner inside the protective sleeve, two ballast chambers equally divided within the inner liner, and a water inlet extending from the protective sleeve to the ballast chambers.

[0009] A buffer air chamber is provided between the inner liner and the protective sleeve. An air inlet is provided on the protective sleeve. A flexible base plate is provided at the bottom of the protective sleeve. The cross-section of the flexible base plate is larger than the bottom area of ​​the protective sleeve. A friction-increasing column is provided at the bottom of the flexible base plate. Multiple fixing holes are provided on the flexible base plate. Fixing screws are provided in the fixing holes. Fixing sleeves are fitted on the fixing screws. One end of the fixing sleeve is provided with a spike.

[0010] Furthermore, both the inner liner and the protective sleeve are isosceles trapezoidal structures.

[0011] Furthermore, a connecting wall is provided between the protective sleeve and the inner liner, and the connecting wall has ventilation holes.

[0012] Furthermore, a buffer device is detachably provided between the flexible base plate and the protective sleeve, which can reduce the impact of water flow on the protective sleeve and the inner liner.

[0013] Furthermore, the end of the friction-enhancing column away from the flexible base plate is provided with a flared-mouth-shaped recess.

[0014] Furthermore, the protective sleeve is provided with a first connecting sleeve and a second connecting sleeve at both ends, the second connecting sleeve being able to be accommodated within the first connecting sleeve, and the first and second connecting sleeves having connecting holes, with pins installed in the connecting holes.

[0015] Furthermore, the protective sleeve is provided with multiple support blocks inside the first connecting sleeve, and there is an insertion gap between the support blocks and the first connecting sleeve. The width of the insertion gap is greater than the thickness of the second connecting sleeve.

[0016] In summary, the beneficial technical effects of this utility model are as follows:

[0017] The flexible base plate and the friction-enhancing columns at the bottom increase the contact area and friction between the entire cofferdam and the ground, further improving stability. It can be used in situations with high water flow velocity, preventing the cofferdam from separating under the impact of water flow and losing its water-blocking function. In addition, the use of fixing sleeves and fixing bolts not only further increases stability, but also facilitates the connection between the flexible base plate and the ground. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 yes Figure 1 A diagram from another angle;

[0020] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0021] Figure 4 This is a schematic diagram illustrating the use of this utility model.

[0022] Reference numerals: 1. Protective sleeve; 2. Inner liner; 3. Flexible base plate; 4. Friction-enhancing column; 5. Fixing screw; 6. Fixing sleeve; 7. Spike; 8. Buffer air chamber; 9. Connecting wall; 10. Ballast tank; 11. Water inlet; 12. Air inlet; 13. First connecting sleeve; 14. Second connecting sleeve; 15. Connecting hole; 16. Support block; 17. Insertion gap; 18. Buffer device; 19. Drain valve. Detailed Implementation

[0023] The present invention will now be described clearly and completely with reference to the embodiments.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] In the description of the embodiments, unless otherwise expressly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it 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 a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] See appendix Figure 1-4 The diagram shows a movable cofferdam for flood control, comprising a protective sleeve 1, an inner liner 2 inside the protective sleeve 1, and two ballast chambers 10 equally divided within the inner liner 2. The protective sleeve 1 and the inner liner 2 are connected by a connecting wall 9, which has ventilation holes. The top of the protective sleeve 1 has multiple water inlets 11, which penetrate the protective sleeve 1 and extend into the ballast chambers 10. In use, the water inlets 11 are connected to a water pump, which then pumps water into the ballast chambers 10. The weight of the water in the ballast chambers 10 supports and blocks water from entering the entire cofferdam.

[0027] In addition, a buffer air chamber 8 is provided between the protective sleeve 1 and the inner liner 2, and an air inlet 12 is provided on the protective sleeve 1, which leads to the buffer air chamber 8. When the inner liner 2 is filled with water during use, the air inlet 12 is used to fill the buffer air chamber 8 with air, and the buffer air chamber 8 protects the inner liner 2.

[0028] The bottom of the protective sleeve 1 is provided with a flexible base plate 3. The cross-sectional area of ​​the flexible base plate 3 is larger than the bottom area of ​​the protective sleeve 1. In this way, the flexible base plate 3 increases the contact area and friction between the entire cofferdam and the ground, making the cofferdam more stable during use. At the same time, several friction-enhancing columns 4 are provided at the bottom of the flexible base plate 3. One end of the friction-enhancing column 4 has a funnel-shaped recess. During use, the friction-enhancing column 4 increases the friction between the flexible base plate 3 and the ground. At the same time, the funnel-shaped recess makes the entire friction-enhancing column 4 generate a suction cup effect, increasing the grip of the flexible base plate 3 and further ensuring the stability of the cofferdam when the water flow velocity is high.

[0029] Furthermore, the flexible base plate 3 is provided with multiple fixing holes, and fixing screws 5 are provided in the fixing holes. Fixing screw sleeves 6 are fitted on the fixing screws 5. One end of the fixing screw sleeve 6 is provided with a spike 7. In use, the fixing screw sleeve 6 is first driven into the ground, and then the entire cofferdam is installed on the ground by connecting the fixing screws 5 and the fixing screw sleeve 6. In this way, the connection between the fixing screws 5 and the fixing screw sleeve 6 not only improves the firmness of the cofferdam on the ground, but also facilitates disassembly after use.

[0030] Furthermore, the protective sleeve 1 has a first connecting sleeve 13 and a second connecting sleeve 14 at both ends, wherein the second connecting sleeve 14 can be accommodated in the first connecting sleeve 13, and the protective sleeve 1 has multiple support blocks 16 inside the first connecting sleeve 13. There is an insertion gap 17 between the support block 16 and the first connecting sleeve 13. At the same time, the first connecting sleeve 13, the second connecting sleeve 14 and the support block 16 are concentrically provided with connection holes 15. When multiple cofferdams need to be connected to block water, the first connecting sleeve 13 of one cofferdam can be inserted into the second connecting sleeve 14 of another cofferdam. After insertion, the second connecting sleeve 14 is exactly located between the support block 16 and the first connecting sleeve 13, and the connection holes 15 of the three are in a concentric position. Then, the connection can be made by using a pin.

[0031] Furthermore, both the protective sleeve 1 and the inner liner 2 are isosceles trapezoids, and the end of the protective sleeve 1 near the flexible bottom plate 3 is an arc structure. Therefore, a buffer device 18 is filled between the protective sleeve 1 and the flexible bottom plate 3. The buffer device 18 can reduce the impact of water flow through the arc structure on the entire cofferdam.

[0032] Finally, a drain valve 19 is provided near the flexible base plate 3 on the protective sleeve 1. The drain valve 19 passes through the protective sleeve 1 and extends into each ballast tank 10. When the use is over, the water in the ballast tank 10 can be drained through the drain valve 19 for easy storage.

[0033] It should be noted that both the protective sleeve 1 and the inner liner 2 are made of high-strength, aging-resistant PVC material made of polyester fiber and are produced by hot-melt process. This not only improves the structural strength of the entire cofferdam but also increases its sealing performance.

[0034] In use, firstly, a corresponding number of fixing sleeves 6 are driven into the ground according to the position of the fixing holes of the flexible base plate 3. Then, the entire cofferdam is fixed to the ground using fixing screws 5. Next, the water inlet 11 is connected to the water pump, and water is injected into each ballast chamber 10 until it is full. Then, the buffer air chamber 8 is inflated through the air inlet 12. Finally, two buffer devices 18 are placed between the protective sleeve 1 and the flexible base plate 3 to reduce the impact of water flow and to stabilize the protective sleeve 1. This utility model increases the contact area and friction between the cofferdam and the ground by setting the flexible base plate 3 and the friction-increasing column 4. With the help of fixing screws 5 and fixing sleeves 6, the entire cofferdam can be used under conditions of large water flow, which improves the overall stability of the cofferdam and avoids the problem of the cofferdam separating from the ground under the action of water flow, thus maximizing the water blocking effect.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape and principle of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A movable flood protection cofferdam, characterized in that: The utility model provides a kind of protective sleeve (1), the inner container (2) is equipped in the protective sleeve (1), the inner container (2) is equally divided and provided with two ballast compartments (10), water inlet (11) is equipped on the protective sleeve (1) and is passed to ballast compartment (10); Buffer air chamber (8) is equipped between the inner container (2) and protective sleeve (1), the protective sleeve (1) is equipped with inflation port (12), the bottom of the protective sleeve (1) is equipped with flexible bottom plate (3), the cross section of the flexible bottom plate (3) is greater than the area of the bottom of protective sleeve (1), the bottom of the flexible bottom plate (3) is equipped with friction increasing column (4), the flexible bottom plate (3) is equipped with multiple fixed holes, fixed screw rod (5) is equipped in the fixed hole, fixed screw nut (6) is equipped on fixed screw rod (5) and is matched, the one end of fixed screw nut (6) is equipped with sharp part (7).

2. The movable cofferdam for flood prevention according to claim 1, characterized in that: The inner container (2) and the protective sleeve (1) are isosceles trapezoidal structure.

3. The movable flood prevention cofferdam according to claim 1, characterized in that: Connection wall (9) is equipped between the protective sleeve (1) and the inner container (2), and air hole is formed in the connection wall (9).

4. The movable flood prevention cofferdam according to claim 1, characterized in that: The flexible bottom plate (3) and the protective sleeve (1) are detachably equipped with buffer device (18), and the buffer device (18) can reduce the impact of water flow on the protective sleeve (1) and the inner container (2).

5. The movable flood cofferdam according to claim 1, characterized in that: The end of the friction increasing column (4) away from the flexible bottom plate (3) is equipped with a concave pit of horn mouth type.

6. The movable flood cofferdam according to claim 1, wherein: The two ends of the protective sleeve (1) are respectively equipped with first connecting sleeve (13) and second connecting sleeve (14), the second connecting sleeve (14) can be accommodated in the first connecting sleeve (13), and connecting hole (15) is formed in the first connecting sleeve (13) and the second connecting sleeve (14), and the connecting hole (15) is matched with the bolt.

7. The movable flood prevention cofferdam according to claim 6, characterized in that: The protective sleeve (1) is equipped with multiple supporting blocks (16) in the first connecting sleeve (13), and the supporting block (16) is equipped with the plug-in gap (17) between the first connecting sleeve (13), and the width of the plug-in gap (17) is greater than the thickness of the second connecting sleeve (14).

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