Air shield dam with low overflow noise

Abstract

The utility model relates to the technical field of air shield dams, and discloses an air shield dam with low overflow noise, which comprises a reinforced concrete bottom plate, the front side of the top of the reinforced concrete bottom plate is fixedly connected with an air shield dam shield plate, and the rear side of the top of the reinforced concrete bottom plate is fixedly connected with a plurality of limiting guide rails. The outer walls of the limiting guide rails are slidably connected with noise reduction floating bodies, the noise reduction floating bodies comprise floating body bodies, the inner walls of the floating body bodies are slidably connected to the outer walls of the multiple limiting guide rails, the tops of the floating body bodies are fixedly connected with buffer layers, and the tops of the buffer layers are fixedly connected with impact-resistant layers. According to the utility model, the noise reduction floating body is always in the falling curve range of the nappe, changes along with the change of the water level and always floats on the water surface under the guidance of the guide rail, so that the buffering, energy dissipation and sound absorption functions of the noise reduction floating body are realized to the maximum extent, and the effect of reducing the overflow noise of the air shield dam is realized.

Description

Technical Field

[0001] This utility model relates to the field of air shield dam technology, and in particular to an air shield dam with low overflow noise. Background Technology

[0002] The air-shield dam absorbs the essence of traditional movable dams while eliminating their shortcomings. It features simple structure, short construction and installation cycle; outstanding flood control and flood season crossing capacity, safe and reliable operation; continuously controllable water height and operating status; stronger cleaning and silt removal capabilities; higher water blocking and water passage capacity; short filling and discharging time, simple operation and management; ultra-long service life, high comprehensive benefits; strong seismic resistance, high adaptability to foundations; and excellent landscape effect.

[0003] However, in actual use, it was found that when the air-supported dam is in overflow mode, because only the water-facing side has an arc plate while the overflow water on the back side falls directly from a height without a guiding structure, the water falls freely, resulting in a large impact and noise, especially at quiet nights. If the air-supported dam is located in residential, scientific research or other areas with noise control requirements, conventionally designed air-supported dams are unlikely to meet the noise control requirements. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a low-overflow noise air shield dam, aiming to improve the existing air shield dam's overflow state. In this state, the air shield dam only has an arc plate on the water-facing side, while the overflow water on the back side falls directly from a height without a guiding structure. The water falls freely, resulting in a large impact and significant noise, especially noticeable at quiet nights. If the air shield dam is located in residential, research, or other areas with noise control requirements, conventionally designed air shield dams are unlikely to meet these noise control requirements.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low overflow noise air shield dam, comprising a reinforced concrete base plate, an air shield dam shield plate fixedly connected to the front top of the reinforced concrete base plate, and a plurality of limiting guide rails fixedly connected to the rear top of the reinforced concrete base plate, wherein a noise reduction float is slidably connected to the outer wall of the limiting guide rails.

[0006] The noise-reducing float includes a float body, the inner wall of which is slidably connected to the outer wall of multiple limiting guide rails. A buffer layer is fixedly connected to the top of the float body, and a shock-resistant layer is fixedly connected to the top of the buffer layer. Multiple guide holes are provided on the surfaces of the shock-resistant layer, the buffer layer, and the float body. Multiple water pipes are fixedly connected inside the float body.

[0007] As a further description of the above technical solution:

[0008] The back of the air-supported dam shield is filled with airbags.

[0009] As a further description of the above technical solution:

[0010] The limiting guide rail is an arc-shaped round bar, and is evenly arranged perpendicular to the water flow direction.

[0011] As a further description of the above technical solution:

[0012] The guide holes are elliptical in shape and their number corresponds to that of the limiting guide rails, and they are evenly distributed on the downstream side in the direction perpendicular to the water flow.

[0013] As a further description of the above technical solution:

[0014] The impact-resistant layer has an undulating, wave-like shape.

[0015] This utility model has the following beneficial effects:

[0016] In this invention, guided by the guide rail, the noise-reducing float is always within the range of the water tongue's descent curve and changes with the water level, always floating on the water surface, thereby ensuring that its buffering, energy dissipation, and sound absorption functions are maximized, thus achieving the effect of reducing the overflow noise of the air shield dam. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the operation of a low-overflow-noise air-shield dam when the water level is very low, as proposed in this utility model.

[0018] Figure 2 A diagram of a noise-reducing floating body for a low-overflow noise air-shield dam proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the sliding rail of a low-overflow noise air shield dam proposed in this utility model.

[0020] Legend:

[0021] 1. Reinforced concrete base slab; 2. Air shield dam shield plate; 3. Airbag; 4. Limiting guide rail; 5. Noise-reducing float; 6. Float body; 7. Buffer layer; 8. Shock-resistant layer; 9. Guide hole; 10. Water guide pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-3An embodiment of this utility model provides a low overflow noise air shield dam, including a reinforced concrete base plate 1. An air shield dam shield plate 2 is fixedly connected to the front top of the reinforced concrete base plate 1. The air shield dam shield plate 2 is used to intercept water flow and form a stable water-blocking structure. Its vertical arrangement provides a foundation for subsequent water flow guidance. Multiple limiting guide rails 4 are fixedly connected to the rear top of the reinforced concrete base plate 1. The limiting guide rails 4 provide precise guidance and limiting for the movement of the noise reduction float 5, preventing the noise reduction float 5 from shifting under the impact of water flow and ensuring its operational stability. The noise reduction float 5 is slidably connected to the outer wall of the limiting guide rail 4. The noise reduction float 5 can slide up and down along the limiting guide rail 4 with the water level change, flexibly adjusting the contact position with the water flow to achieve dynamic noise reduction.

[0024] Reference Figure 2 The noise-reducing float 5 includes a float body 6, the inner wall of which is slidably connected to the outer wall of multiple limiting guide rails 4. The float body 6 is made of a closed-cell lightweight material, which can float in water and generate relative displacement within a certain range under the guidance of the limiting guide rails 4, so that it is always in the optimal position for the impact of the overflow water flow. A buffer layer 7 is fixedly connected to the top of the float body 6. The buffer layer 7 is made of highly elastic, lightweight, and flexible rubber material with good water conductivity. It is attached to the float body 6 and can effectively absorb the energy generated by the water flow impact, reducing the direct impact on the float body 6. A shock-resistant layer 8 is fixedly connected to the top of the buffer layer 7. The shock-resistant layer 8 is made of lightweight, flexible, and hydrophobic material with good impact resistance and water conductivity. The shock-resistant layer 8 is attached to the buffer layer 7 and can withstand long-term scouring and high-speed impact of water flow, further enhancing the durability of the noise-reducing float 5. Multiple guide holes 9 are opened on the surface of the shock-resistant layer 8, the buffer layer 7 and the float body 6. The guide holes 9 allow the noise-reducing float 5 to slide smoothly on the limiting guide rail 4, so that the noise-reducing float 5 can perform noise reduction operation according to the water level. Multiple water guide pipes 10 are fixedly connected inside the float body 6. The water guide pipes 10 can guide the water flow inside the float body 6, balance the internal pressure, and further reduce overflow noise by changing the water flow path. At the same time, while guiding the water flow, the water guide pipes 10 will further reduce overflow noise through their own sealing characteristics.

[0025] Reference Figure 1 and Figure 3 The back of the air shield plate 2 is filled with airbags 3. The airbags 3 are used to support the air shield plate 2 and ensure that the air shield plate 2 can be in a specific angle. At the same time, the flexible structure of the airbags 3 can change the reflection angle when the water flow comes into contact with the shield plate, reducing the water flow impact noise.

[0026] Reference Figures 1-3The limiting guide rail 4 is an arc-shaped round bar, and it is evenly arranged perpendicular to the water flow direction. The uniform arrangement of the limiting guide rail 4 perpendicular to the water flow direction can make the noise reduction float 5 be evenly stressed during movement, avoiding jamming or tilting due to uneven stress. The arc-shaped round bar design can reduce the obstruction of water flow and reduce the disturbance and noise generated when the water flows through the limiting guide rail 4.

[0027] Reference Figures 1-3 The guide holes 9 are elliptical and their number is opposite to that of the limiting guide rails 4. They are evenly distributed on the downstream side in the direction perpendicular to the water flow to ensure that the noise reduction float 5 can slide on the limiting guide rails 4 and reduce the interference caused by the movement of the noise reduction float 5 under different water level conditions.

[0028] Reference Figures 1-3 The impact-resistant layer 8 has an undulating wave-like surface. The wave-like surface of the impact-resistant layer 8 can disrupt the smooth flow of water, causing the water to form multiple tiny eddies on the surface. These eddies consume the energy of the water flow, reduce the water flow speed, and thus reduce the noise generated by the water flow impact. At the same time, the wave-like structure can also increase the reflection and scattering of sound waves, further weakening the noise intensity.

[0029] Working principle: When there is no water downstream or the water level is very low, the noise-reducing float 5 is in the reserved channel. The water jet directly impacts the noise-reducing float 5. The high-speed water flow flows out from the water guide pipe 10, buffer layer 7 and shock-resistant layer 8 at the bottom of the noise-reducing float 5. After the noise-reducing float 5 buffers and dissipates energy (the float floats up and down in the water to buffer and dissipate energy, and the float itself deforms to dissipate energy) and absorbs sound, the water flow velocity is greatly reduced. The noise when it collides with the bottom plate and the downstream water body is greatly reduced, thereby reducing the overflow noise.

[0030] When there is a certain water depth downstream, the noise reduction float 5 floats in the water. Due to the guidance of the limiting guide rail 4, it is always on the falling track of the water tongue. The water tongue directly impacts the noise reduction float 5. The high-speed water flow flows out from the water guide pipe 10, buffer layer 7 and shock-resistant layer 8 at the bottom of the noise reduction float 5. After the float buffers and dissipates energy (the float floats up and down in the water to buffer and dissipate energy and the float float itself to dissipate energy through deformation) and absorbs sound, the water flow velocity is greatly reduced. The noise when it collides with the downstream water body is greatly reduced, thereby reducing the overflow noise.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-overflow noise air-shield dam, comprising a reinforced concrete base slab (1), characterized in that: The front top of the reinforced concrete base plate (1) is fixedly connected to the air shield dam shield plate (2), and the rear top of the reinforced concrete base plate (1) is fixedly connected to multiple limiting guide rails (4). The outer wall of the limiting guide rails (4) is slidably connected to a noise reduction float (5). The noise reduction float (5) includes a float body (6), the inner wall of the float body (6) is slidably connected to the outer wall of multiple limiting guide rails (4), a buffer layer (7) is fixedly connected to the top of the float body (6), a shock-resistant layer (8) is fixedly connected to the top of the buffer layer (7), multiple guide holes (9) are opened on the surface of the shock-resistant layer (8), the buffer layer (7) and the float body (6), and multiple water guide pipes (10) are fixedly connected inside the float body (6).

2. The air-shield dam with low overflow noise according to claim 1, characterized in that: The back of the air-shield dam shield plate (2) is filled with airbags (3).

3. The air-shield dam with low overflow noise according to claim 1, characterized in that: The limiting guide rail (4) is an arc-shaped round bar and is evenly arranged perpendicular to the water flow direction.

4. A low-overflow noise air-shield dam according to claim 1, characterized in that: The guide holes (9) are elliptical in shape and their number is opposite to that of the limiting guide rails (4), and they are evenly distributed on the downstream side in the direction perpendicular to the water flow.

5. A low-overflow noise air-shield dam according to claim 1, characterized in that: The impact-resistant layer (8) has an undulating wave-like surface.

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