Water flow plane wave absorbing device for water conveying channel

Abstract

The utility model discloses a water conveyance canal water flow plane wave-absorbing device which comprises a cross beam horizontally and fixedly arranged above a rectangular channel section of an aqueduct in the left-right direction, the positions, on the left side and the right side of a flow guide pier, below the cross beam are each provided with a frequency modulation wave-absorbing floating plate assembly, and the bottom face of the cross beam is provided with a lifting driver connected with the tops of the frequency modulation wave-absorbing floating plate assemblies. A water surface fluctuation monitoring sensor is arranged in front of the cross beam in the aqueduct, a fluctuation signal processor and a PLC are arranged on the cross beam, the signal output end of the water surface fluctuation monitoring sensor is connected with the signal input end of the PLC through the fluctuation signal processor, and the signal output end of the PLC is connected with the signal input end of the lifting driver. According to the utility model, the flow capacity of the aqueduct can be improved, the safe and stable operation of the aqueduct is ensured, and the aqueduct has remarkable economic benefits and social benefits.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy engineering technology, specifically relating to a planar wave-damping device for water flow in water conveyance channels. Background Technology

[0002] In hydraulic facilities such as aqueducts and open water conveyance channels, non-steady flow conditions such as changes in upstream and downstream water levels, gate opening and closing, and pump station operation can easily generate derivative waves (such as gravity waves and oscillating waves). If these waves are not effectively suppressed during propagation, they may cause problems such as reduced flow capacity and structural safety hazards. Moreover, existing technologies mostly rely on fixed structures (such as stilling basins and guide piers) or rigid materials to absorb energy, which cannot dynamically adapt to changes in wave frequency and has low energy dissipation efficiency for high-frequency waves.

[0003] Current technologies lack open channel wave suppression devices that combine frequency modulation with damping enhancement and can dynamically adapt to complex hydraulic conditions. Furthermore, existing technologies cannot actively adjust the natural frequency of the water body vibration system. When the frequency of derived waves caused by unsteady upstream and downstream flows approaches the natural frequency of the aqueduct water, resonance is easily triggered, exacerbating wave amplitude and leading to uncontrolled energy accumulation. Existing methods often increase water flow friction through physical barriers (such as rigid baffles) or surface roughness (such as roughened linings), but the damping coefficient is fixed and cannot be dynamically optimized according to wave amplitude, flow rate, and other operating conditions. Especially when dealing with high-frequency waves, energy dissipation efficiency decreases significantly, making it difficult to suppress wave crest overflow or structural vibration. Utility Model Content

[0004] The purpose of this invention is to provide a water flow plane wave-damping device for water conveyance channels that is scientifically designed, safe and reliable, dynamically operated, and has a good wave-damping effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a planar wave-damping device for water flow in a water conveyance channel, with the direction of water flow in the aqueduct as the front-to-back direction. A guide pier is provided in the middle of the rectangular channel section of the aqueduct along the water flow direction. The device includes a horizontal beam fixedly installed above the rectangular channel section of the aqueduct in the left-right direction. A set of frequency-modulated wave-damping float assemblies is provided on the left and right sides of the guide pier below the beam. A lifting driver connected to the top of the frequency-modulated wave-damping float assembly is provided on the bottom surface of the beam. A water surface wave monitoring sensor is provided in front of the beam inside the aqueduct. A wave signal processor and a PLC controller are provided on the beam. The signal output terminal of the water surface wave monitoring sensor is connected to the signal input terminal of the PLC controller through the wave signal processor. The signal output terminal of the PLC controller is connected to the signal input terminal of the lifting driver.

[0006] Each frequency modulation wave-damping float assembly includes two float frames spaced apart on the left and right. The upper and lower ends of the float frames are respectively provided with an upper vertical slide bar and a lower vertical slide bar. The crossbeam has an upper sliding hole for the upper vertical slide bar to pass through. A vertical sleeve is pre-embedded in the concrete at the bottom of the rectangular channel section. The lower vertical slide bar extends into and slides within the vertical sleeve.

[0007] The floating plate frame includes a rectangular cylinder that is open at the front and back. At least one layer of wave-damping plates is horizontally installed inside the rectangular cylinder. The lower end of the upper vertical sliding rod is fixedly connected to the top surface of the rectangular cylinder, and the upper end of the lower vertical sliding rod is fixedly connected to the bottom surface of the rectangular cylinder.

[0008] The upper end of the vertical slide bar is equipped with a limiting cap located above the crossbeam, and the outer diameter of the limiting cap is larger than the diameter of the upper sliding hole.

[0009] The water surface fluctuation monitoring sensor uses pressure sensors, vibration sensors, float sensors, and photoelectric sensors; the lifting drive uses hydraulic cylinders.

[0010] Using the above technical solution, the specific working process of the present invention is as follows: The water surface wave monitoring sensor in the aqueduct detects the water surface wave signal and transmits it to the wave signal processor. The wave signal processor transmits the processed signal to the PLC controller. The PLC controller controls the lifting drive to start according to the strength of the signal. The telescopic rod of the lifting drive moves up and down reciprocally, driving the float frame and the wave-damping plate to move up and down reciprocally in the wavy water. The top and bottom plates of the float frame and the wave-damping plate reduce the amplitude of the water body by changing the natural frequency of the water vibration system. At the same time, the movement of the float increases the damping effect of the water body, realizing the dual dissipation of water wave energy, thereby effectively suppressing water wave.

[0011] The upper and lower vertical sliding rods not only block the impact of the water flow and ensure the stability of the float frame in the front-to-back direction, but also guide the vertical movement of the float frame. Due to the self-weight of the float frame, when the water is calm, the limiting cap prevents the upper vertical sliding rod from detaching from the crossbeam.

[0012] This invention significantly improves the stability and safety of aqueduct water transport by utilizing a frequency-modulated wave-damping float assembly to dampen water waves. It effectively suppresses the amplitude of derived waves, reduces the impact of water oscillations on the aqueduct structure, prevents water splashing and overflow, and enhances the damping efficiency by controlling the extension and retraction frequency of the lifting actuator through water oscillations of different frequencies. This rapidly dissipates wave energy, reduces the risk of structural vibration, and the modular design facilitates installation and maintenance without interfering with normal water transport, combining long-term effectiveness with economic efficiency.

[0013] Setting up two or more floating plate frames side by side can improve the sensitivity of the vertical movement of a single floating plate frame during actual wave dissipation.

[0014] Compared with existing technologies, it has the following technical advantages:

[0015] 1) Improve flow capacity: Effectively suppress the vertical oscillation of water in the aqueduct, reduce the vertical amplitude of water surface waves, and prevent oscillation waves from splashing out of the aqueduct, thereby increasing the effective water passage cross section of the aqueduct and improving the flow capacity of the aqueduct, meeting the needs of tapping potential and expanding capacity and increasing flow operation of the South-to-North Water Diversion Middle Route Main Canal.

[0016] 2) Ensure the safety of the aqueduct: reduce structural vibrations caused by water fluctuations, lower the risk of structural damage, ensure the safe and stable operation of the aqueduct, and extend the service life of the aqueduct.

[0017] 3) High cost-effectiveness: Compared with active control technology, the present invention consumes less energy and has a lower cost; at the same time, by improving the flow capacity and ensuring the safety of the aqueduct, it generates significant economic and social benefits. Attached Figure Description

[0018] Figure 1 This is a top view of the present invention;

[0019] Figure 2 This is a frontal perspective view of the present invention;

[0020] Figure 3 yes Figure 2 Enlarged view of part A in the middle. Detailed Implementation

[0021] like Figures 1-3 As shown, the water flow plane wave-damping device of this utility model has the water flow direction in the aqueduct as the direction from front to back. The rectangular channel section 1 of the aqueduct is provided with a guide pier 2 in the middle along the water flow direction. It includes a crossbeam 3 that is horizontally fixed above the rectangular channel section 1 of the aqueduct in the left and right direction. Below the crossbeam 3, a set of frequency-modulated wave-damping float assemblies 4 are respectively provided on the left and right sides of the guide pier 2. The bottom surface of the crossbeam 3 is provided with a lifting driver 5 that is connected to the top of the frequency-modulated wave-damping float assembly 4. The aqueduct has a water surface wave monitoring sensor 6 in front of the crossbeam 3. The crossbeam 3 is provided with a wave signal processor 7 and a PLC controller 8. The signal output terminal of the water surface wave monitoring sensor 6 is connected to the signal input terminal of the PLC controller 8 through the wave signal processor 7. The signal output terminal of the PLC controller 8 is connected to the signal input terminal of the lifting driver 5.

[0022] Each frequency modulation wave-damping float assembly 4 includes two float frames spaced apart on the left and right. The upper and lower ends of the float frames are respectively provided with an upper vertical slide rod 9 and a lower vertical slide rod 10. The crossbeam 3 is provided with an upper sliding hole for the upper vertical slide rod 9 to pass through. A vertical sleeve is pre-embedded in the concrete at the bottom of the rectangular channel section 1. The lower vertical slide rod 10 extends into and slides in the vertical sleeve.

[0023] The floating frame includes a rectangular cylinder 11 that is open at the front and back. At least one layer of wave-damping plate 12 is horizontally provided inside the rectangular cylinder 11. The lower end of the upper vertical slide rod 9 is fixedly connected to the top surface of the rectangular cylinder 11, and the upper end of the lower vertical slide rod 10 is fixedly connected to the bottom surface of the rectangular cylinder 11.

[0024] The upper vertical slide bar 9 is provided with a limiting cap 13 located above the crossbeam 3. The outer diameter of the limiting cap 13 is larger than the diameter of the upper sliding hole.

[0025] The water surface fluctuation monitoring sensor 6 uses a pressure sensor, a vibration sensor, a float sensor, and a photoelectric sensor; the lifting drive 5 uses a hydraulic cylinder.

[0026] The specific working process of this invention is as follows: The water surface wave monitoring sensor 6 in the aqueduct detects the water surface wave signal and transmits it to the wave signal processor 7. The wave signal processor 7 transmits the processed signal to the PLC controller 8. The PLC controller 8 controls the lifting driver 5 to start according to the strength of the signal. The telescopic rod of the lifting driver 5 moves up and down repeatedly, driving the float frame and the wave-damping plate 12 to move up and down repeatedly in the undulating water. The top and bottom plates of the float frame and the wave-damping plate 12 reduce the amplitude of the water body by changing the natural frequency of the water body vibration system. At the same time, the movement of the float increases the damping effect of the water body, realizing the dual dissipation of water body wave energy, thereby effectively suppressing water body waves.

[0027] The upper vertical slide bar 9 and the lower vertical slide bar 10 not only block the impact of the water flow and ensure the stability of the float frame in the front-to-back direction, but also guide the up-and-down movement of the float frame. Due to the self-weight of the float frame, when there is no water movement, the limiting cap 13 prevents the upper vertical slide bar 9 from detaching from the crossbeam 3.

[0028] This invention significantly improves the stability and safety of aqueduct water transport by utilizing the frequency-modulated wave-damping float assembly 4 to dampen water waves. It effectively suppresses the amplitude of derived waves, reduces the impact of water oscillations on the aqueduct structure, prevents water splashing and overflow, and enhances the damping efficiency mechanism by controlling the extension and retraction frequency of the lifting actuator 5 through water oscillations of different frequencies. This rapidly dissipates wave energy, reduces the risk of structural vibration, and the modular design facilitates installation and maintenance without interfering with normal water transport, combining long-term effectiveness with economic efficiency.

[0029] Setting up two or more floating plate frames side by side can improve the sensitivity of the vertical movement of a single floating plate frame during actual wave dissipation.

[0030] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A planar wave-damping device for water conveyance channels, wherein the direction of water flow within the aqueduct is taken as the front-to-back direction, and a guide pier is provided in the middle of the rectangular channel section of the aqueduct along the water flow direction, characterized in that: The system includes a horizontal beam fixed above a rectangular channel section of the aqueduct along the left-right direction. Below the beam, on both sides of the guide pier, there is a set of frequency-modulated wave-damping float assemblies. The bottom surface of the beam is equipped with a lifting drive connected to the top of the frequency-modulated wave-damping float assembly. A water surface wave monitoring sensor is installed in front of the beam inside the aqueduct. A wave signal processor and a PLC controller are installed on the beam. The signal output terminal of the water surface wave monitoring sensor is connected to the signal input terminal of the PLC controller through the wave signal processor. The signal output terminal of the PLC controller is connected to the signal input terminal of the lifting drive.

2. A water channel flow plane dissipator according to claim 1, characterized in that: Each frequency modulation wave-damping float assembly includes two float frames spaced apart on the left and right. The upper and lower ends of the float frames are respectively provided with an upper vertical slide bar and a lower vertical slide bar. The crossbeam has an upper sliding hole for the upper vertical slide bar to pass through. A vertical sleeve is pre-embedded in the concrete at the bottom of the rectangular channel section. The lower vertical slide bar extends into and slides within the vertical sleeve.

3. A water channel flow plane dissipator according to claim 2, characterised in that: The floating plate frame includes a rectangular cylinder that is open at the front and back. At least one layer of wave-damping plates is horizontally installed inside the rectangular cylinder. The lower end of the upper vertical sliding rod is fixedly connected to the top surface of the rectangular cylinder, and the upper end of the lower vertical sliding rod is fixedly connected to the bottom surface of the rectangular cylinder.

4. The water flow plane wave damping device for water conveyance channels according to claim 3, characterized in that: The upper end of the vertical slide bar is equipped with a limiting cap located above the crossbeam, and the outer diameter of the limiting cap is larger than the diameter of the upper sliding hole.

5. A water channel flow plane dissipator according to any one of claims 1 to 3, characterised in that: The water surface fluctuation monitoring sensor uses pressure sensors, vibration sensors, float sensors, and photoelectric sensors; the lifting drive uses hydraulic cylinders.

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