Combined wave absorbing system for water flow of water conveyance canal

Abstract

The combined type wave absorbing system comprises a front cross beam and a rear cross beam which are arranged above a front end opening and a rear end opening of a rectangular channel section respectively, and two sets of grating type eddy current damping wave absorbing assemblies located in the rectangular channel section are arranged on the front cross beam; the two grating type eddy current damping wave absorbing assemblies are located on the left side and the right side of the flow guide pier correspondingly, and the two frequency modulation floating plate wave absorbing assemblies located in the rectangular channel section are arranged on the rear cross beam and located on the left side and the right side of the flow guide pier correspondingly. The overflow capacity of the aqueduct can be improved, safe and stable operation of the aqueduct is guaranteed, and remarkable economic benefits and social benefits are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of water conservancy projects, and particularly relates to a combined water flow wave-dissipating system for a water conveyance channel. Background Art

[0002] In water conservancy facilities such as aqueducts and open water conveyance channels of large-scale water conveyance channels, due to unsteady flow conditions such as upstream and downstream water level changes, gate opening and closing, and pump station operation, derivative waves (such as gravity waves and shock waves) are extremely likely to be generated. These fluctuations will not only cause the shock wave to touch the upper tie beam of the aqueduct and splash out of the aqueduct, reducing the flow capacity of the aqueduct, but may also cause structural tremors, threatening the safety of the aqueduct and other problems. Moreover, existing technologies mostly rely on fixed structures (such as stilling basins and guide piers) or rigid materials to absorb energy, unable to dynamically adapt to changes in wave frequencies, and having low energy dissipation efficiency for high-frequency waves.

[0003] There is no existing technology for an open channel wave suppression device that combines frequency modulation and damping enhancement and can dynamically adapt to complex hydraulic conditions. And existing technologies cannot actively adjust the natural frequency of the water body vibration system. When the frequency of the derivative wave caused by unsteady flow upstream and downstream approaches the natural frequency of the aqueduct water body, resonance is extremely likely to occur, exacerbating the wave amplitude and leading to out-of-control energy accumulation. Existing methods mostly increase water flow friction through physical barriers (such as rigid baffles) or surface roughness (such as roughened lining), but the damping coefficient is fixed and cannot be dynamically optimized according to working conditions such as wave amplitude and flow rate. Especially when dealing with high-frequency fluctuations, the energy dissipation efficiency significantly decreases, making it difficult to suppress wave crest overflow or structural tremors. Summary of the Invention

[0004] The purpose of the present invention is to provide a combined water flow wave-dissipating system for a water conveyance channel with scientific principles, capable of suppressing the vertical fluctuations of the water surface wave, ensuring the safe operation of the aqueduct, and improving the flow capacity.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: For the combined water flow wave-dissipating system of the water conveyance channel, with the water flow direction in the aqueduct being from front to back, a guide pier is arranged along the water flow direction in the middle of the rectangular channel section of the aqueduct, including a front cross beam and a rear cross beam respectively arranged above the front port and the rear port of the rectangular channel section. Two sets of grid-type eddy current damping wave-dissipating components located inside the rectangular channel section are arranged on the front cross beam, and the two sets of grid-type eddy current damping wave-dissipating components are respectively located on the left and right sides of the guide pier. Two sets of frequency-modulated floating plate wave-dissipating components located inside the rectangular channel section are arranged on the rear cross beam, and the two sets of frequency-modulated floating plate wave-dissipating components are respectively located on the left and right sides of the guide pier.

[0006] A front water surface fluctuation monitoring sensor located below the water surface is arranged inside the aqueduct in front of the front cross beam. A front fluctuation signal processor and a front PLC controller are arranged on the front cross beam. The signal output end of the front water surface fluctuation monitoring sensor is connected to the signal input end of the front PLC controller through the front fluctuation signal processor, and the signal output end of the front PLC controller is connected to the signal input end of the grid type eddy current damping wave elimination component.

[0007] Each set of grid type eddy current damping wave elimination components includes two metal frames and two flat plate electromagnets. The two flat plate electromagnets are respectively fixed on the side walls of the rectangular channel section and the side walls of the guide pier. The two flat plate electromagnets are arranged corresponding to each other left and right. The two metal frames are arranged at intervals left and right between the two flat plate electromagnets. The upper and lower ends of the metal frame are respectively provided with a first upper vertical sliding rod and a first lower vertical sliding rod. A first upper sliding hole for passing through the first upper vertical sliding rod is opened on the front cross beam. A first vertical sleeve is embedded in the concrete at the front bottom of the rectangular channel section. The first lower vertical sliding rod extends into and is slidably connected to the first vertical sleeve. A support plate is arranged between the two metal frames. The upper and lower ends of the support plate are respectively fixedly connected to the bottom surface of the front cross beam and the bottom surface of the rectangular channel section.

[0008] The metal frame includes a first rectangular cylinder body that is transparent from front to back. At least one vertical grid plate parallel to the flat plate electromagnet is arranged inside the first rectangular cylinder body. The lower end of the first upper vertical sliding rod is fixedly connected to the top surface of the first rectangular cylinder body, and the upper end of the first lower vertical sliding rod is fixedly connected to the bottom surface of the first rectangular cylinder body.

[0009] A first limit cap located above the front cross beam is arranged at the upper end of the first upper vertical sliding rod. The outer diameter of the first limit cap is larger than the diameter of the first upper sliding hole.

[0010] A rear water surface fluctuation monitoring sensor located below the water surface is arranged inside the aqueduct behind the front cross beam and in front of the rear cross beam. A rear fluctuation signal processor and a rear PLC controller are arranged on the rear cross beam. The signal output end of the rear water surface fluctuation monitoring sensor is connected to the signal input end of the rear PLC controller through the rear fluctuation signal processor, and the signal output end of the rear PLC controller is connected to the signal input end of the frequency modulation floating plate wave elimination component.

[0011] Each set of frequency modulation floating plate wave elimination components includes two floating plate frames arranged at intervals left and right. The upper and lower ends of the floating plate frame are respectively provided with a second upper vertical sliding rod and a second lower vertical sliding rod. A second upper sliding hole for passing through the second upper vertical sliding rod is opened on the rear cross beam. A second vertical sleeve is embedded in the concrete at the rear bottom of the rectangular channel section. The second lower vertical sliding rod extends into and is slidably connected to the second vertical sleeve.

[0012] The floating board frame includes a second rectangular cylinder body that is transparent from front to back. At least one layer of wave-dissipating plates is horizontally arranged inside the second rectangular cylinder body. The lower end of the second upper vertical slide bar is fixedly connected to the top surface of the second rectangular cylinder body, and the upper end of the second lower vertical slide bar is fixedly connected to the bottom surface of the second rectangular cylinder body.

[0013] The upper end of the second upper vertical slide bar is provided with a second limit cap located above the rear cross beam, and the outer diameter of the second limit cap is larger than the diameter of the second upper slide hole.

[0014] Adopting the above technical solution, the working principle of the surface wave elevation suppression technology of the present invention is as follows: Based on the eddy current damping technology that has been successfully applied in structural vibration reduction, an eddy current damping wave-dissipating component is designed and developed. When the water body in the aqueduct generates vertical oscillations due to non-constant derivative waves, the metal frame will cut the magnetic induction lines when moving up and down reciprocally in the magnetic field formed after the two flat electromagnets are energized, generating eddy currents. The eddy currents form an induced magnetic field, which interacts with the vertical fluctuations of the water body, thereby generating a damping effect that hinders the up and down reciprocating movement of the water body. By precisely designing the structural parameters of the grid-type eddy current damping wave-dissipating component, such as shape, size, material, and the spacing between the grids, etc., controlling the energizing current of the flat electromagnets, and then controlling the eddy current intensity, the size of the damping effect can be accurately adjusted. Reasonably select the grid material to ensure that the energy dissipation caused by the conductor resistance can effectively form a damping effect to inhibit the reciprocating movement of the water body.

[0015] The specific working process of the present invention is as follows: The front water surface fluctuation sensor in the aqueduct transmits the monitored front water surface fluctuation signal in front of the rectangular channel section to the front fluctuation signal processor. The front fluctuation signal processor transmits the processed signal to the front PLC controller. The front PLC controller controls the switches of the two flat electromagnets according to the strength of the signal to supply corresponding intensity of current. A magnetic field is generated between the two flat electromagnets. The metal frame will cut the magnetic induction lines when moving up and down reciprocally in the magnetic field formed after the two flat electromagnets are energized, generating eddy currents. The eddy currents form an induced magnetic field, which interacts with the vertical fluctuations of the water body, thereby generating a damping effect that hinders the up and down reciprocating movement of the water body, thus achieving effective suppression of the water body fluctuations.

[0016] After the vortex elimination and wave suppression of the grid-type eddy current damping wave elimination component, there is still water fluctuation in the rectangular channel section. At this time, the water surface fluctuation signal monitored by the rear water surface fluctuation sensor is transmitted to the rear fluctuation signal processor, and the rear fluctuation signal processor transmits the processed signal to the rear PLC controller. The rear PLC controller controls the start of the lifting drive according to the strength of the signal. The telescopic rod of the lifting drive reciprocates up and down, driving the floating plate frame and the wave elimination plate to reciprocate up and down in the fluctuating water. The top plate and bottom plate of the floating plate frame and the wave elimination plate change the natural frequency of the water body vibration system, reduce the amplitude of the water body, and at the same time use the movement of the floating plate to increase the damping effect of the water body, realizing the dual-effect dissipation of the water body fluctuation energy, so as to effectively suppress the water body fluctuation. After the fluctuating water body passes through the grid-type eddy current damping wave elimination component and the frequency modulation floating plate wave elimination component in the rectangular channel section, the water body fluctuation is basically eliminated.

[0017] The setting of the first upper vertical slide bar and the first lower vertical slide bar not only blocks the impact force of the water flow, ensures the stability of the metal frame in the front-back direction, but also has a guiding effect on the up and down movement process of the metal frame. Due to the self-weight of the metal frame, when the water body is not fluctuating, the first limit cap plays a role in preventing the first upper vertical slide bar from detaching from the front cross beam.

[0018] The present invention develops a grid-type eddy current damping wave elimination component, and combines with hydraulic model tests to determine the best way and parameters for setting the grid-type eddy current damping wave elimination component at key positions such as the inlet of the aqueduct, forming a complete technical solution for suppressing the vertical surface wave of the open channel water surface with vertical wave elimination and vibration reduction functions, and realizing the effective suppression of the vertical surface fluctuation of the water body in the aqueduct.

[0019] Two or more metal frames are arranged side by side left and right, which can improve the sensitivity of the up and down movement of a single metal frame during the actual wave elimination process.

[0020] The setting of the second upper vertical slide bar and the second lower vertical slide bar not only blocks the impact force of the water flow, ensures the stability of the floating plate frame in the front-back direction, but also has a guiding effect on the up and down movement process of the floating plate frame. Due to the self-weight of the floating plate frame, when the water body is not fluctuating, the second limit cap plays a role in preventing the upper vertical slide bar from detaching from the cross beam.

[0021] The present invention further eliminates the wave of the water body through the frequency modulation wave elimination floating plate component, significantly improving the water conveyance stability and safety of the aqueduct. It effectively suppresses the amplitude of the derivative wave, reduces the impact of the water body oscillation on the aqueduct structure, avoids the water splashing and overflowing, and controls the telescopic frequency adjustment of the lifting drive through the water body fluctuations of different frequencies, thereby enhancing the damping and efficiency enhancement mechanism, quickly dissipating the fluctuation energy, reducing the risk of structural tremor, and the modular design is convenient for installation and maintenance without interfering with the normal water conveyance, with both long-term effectiveness and economy.

[0022] Two or more floating plate frames are arranged side by side on the left and right, which can improve the sensitivity of the up and down movement of a single floating plate frame during the actual wave dissipation process.

[0023] Compared with the prior art, it has the following technical effects:

[0024] 1) Improve the flow-through capacity: effectively suppress the vertical oscillation of the water body in the aqueduct, reduce the vertical amplitude of the water surface wave, avoid the splashing of the oscillation wave over the aqueduct, thereby increasing the effective water-crossing section of the aqueduct, improving the flow-through capacity of the aqueduct, and meeting the needs of tapping the potential and expanding the capacity of the main canal and operating with increased flow.

[0025] 2) Ensure the safety of the aqueduct: reduce the tremor of the aqueduct structure caused by water body fluctuation, reduce the risk of structural damage, ensure the safe and stable operation of the aqueduct, and extend the service life of the aqueduct.

[0026] 3) High cost-effectiveness: Compared with the active control technology, the present invention has low energy consumption and low cost; at the same time, by improving the flow-through capacity and ensuring the safety of the aqueduct, significant economic and social benefits are generated.

[0027] 4) Easy to implement: This technology can be implemented without changing the existing water conservancy structure of the aqueduct. Only grid-type eddy current damping wave dissipation components need to be set at the inlet and outlet of the aqueduct, which is convenient for popularization and application in existing aqueduct projects.

[0028] 5) Grid-type eddy current damping wave dissipation components and frequency modulation floating plate wave dissipation components are respectively set at the front port and the rear port of the rectangular channel section of the aqueduct. By means of double vortex elimination and wave suppression, the fluctuating water body passing through the rectangular channel section is subjected to vortex elimination and wave suppression in sequence, greatly improving the effect of vortex elimination and wave suppression, and ensuring that the water body has basically no fluctuation when passing through the rectangular channel section. Description of the Drawings

[0029] Figure 1 is the top view of the present invention; Figure 2 is the front side three-dimensional structure schematic diagram of the present invention; Figure 3 is Figure 2 the enlarged view of part A in Figure 4 is the rear side three-dimensional structure schematic diagram of the present invention; Figure 5 is Figure 4 the enlarged view of part B in Detailed Embodiments

[0030] Such as Figures 1-5As shown in the figure, the combined water flow wave - eliminating system of the water conveyance channel of the present invention takes the water flow direction in the aqueduct as the front - to - rear direction. In the middle of the rectangular channel section 1 of the aqueduct, a guide pier 2 is provided along the water flow direction. It includes a front cross - beam 3 and a rear cross - beam 4 respectively arranged above the front port and the rear port of the rectangular channel section 1. On the front cross - beam 3, two sets of grid - type eddy - current damping wave - eliminating components 5 located inside the rectangular channel section 1 are provided. The two sets of grid - type eddy - current damping wave - eliminating components 5 are respectively located on the left and right sides of the guide pier 2. On the rear cross - beam 4, two sets of tuned floating - plate wave - eliminating components 6 located inside the rectangular channel section 1 are provided. The two sets of tuned floating - plate wave - eliminating components 6 are respectively located on the left and right sides of the guide pier 2.

[0031] In front of the front cross - beam 3 in the aqueduct, a front water - surface fluctuation monitoring sensor 7 located below the water surface is arranged. On the front cross - beam 3, a front fluctuation signal processor 8 and a front PLC controller 9 are provided. The signal output end of the front water - surface fluctuation monitoring sensor 7 is connected to the signal input end of the front PLC controller 9 through the front fluctuation signal processor 8. The signal output end of the front PLC controller 9 is connected to the signal input end of the grid - type eddy - current damping wave - eliminating component 5.

[0032] Each set of grid - type eddy - current damping wave - eliminating component 5 includes two metal frames and two flat - plate electromagnets 11. The two flat - plate electromagnets 11 are respectively fixed on the side wall of the rectangular channel section 1 and the side wall of the guide pier 2. The two flat - plate electromagnets 11 are arranged corresponding to each other left and right. The two metal frames are arranged at intervals left and right between the two flat - plate electromagnets 11. The upper and lower ends of the metal frame are respectively provided with a first upper vertical sliding rod 12 and a first lower vertical sliding rod 13. On the front cross - beam 3, a first upper sliding hole for passing through the first upper vertical sliding rod 12 is opened. In the concrete at the front bottom of the rectangular channel section 1, a first vertical sleeve is embedded. The first lower vertical sliding rod 13 extends into and is slidably connected to the first vertical sleeve. Between the two metal frames, a support plate 14 is provided. The upper and lower ends of the support plate 14 are respectively fixedly connected to the bottom surface of the front cross - beam 3 and the bottom surface of the rectangular channel section 1.

[0033] The metal frame includes a first rectangular cylinder 10 that is transparent from front to back. Inside the first rectangular cylinder 10, at least one vertical grid plate 15 parallel to the flat - plate electromagnet 11 is provided. The lower end of the first upper vertical sliding rod 12 is fixedly connected to the top surface of the first rectangular cylinder 10. The upper end of the first lower vertical sliding rod 13 is fixedly connected to the bottom surface of the first rectangular cylinder 10.

[0034] The upper end of the first upper vertical sliding rod 12 is provided with a first limit cap 16 located above the front cross - beam 3. The outer diameter of the first limit cap 16 is larger than the diameter of the first upper sliding hole.

[0035] A rear water surface fluctuation monitoring sensor 17 located under the water surface is arranged behind the front crossbeam 3 and in front of the rear crossbeam 4 in the aqueduct. A rear fluctuation signal processor 18 and a rear PLC controller 19 are arranged on the rear crossbeam 4. The signal output end of the rear water surface fluctuation monitoring sensor 17 is connected to the signal input end of the rear PLC controller 19 through the rear fluctuation signal processor 18, and the signal output end of the rear PLC controller 19 is connected to the signal input end of the frequency modulation floating plate wave-breaking component 6.

[0036] Each set of frequency modulation floating plate wave-breaking components 6 includes two floating plate frames spaced apart from each other on the left and right sides, and a second upper vertical slide bar 21 and a second lower vertical slide bar 22 are respectively provided at the upper and lower ends of the floating plate frames. A second upper slide hole for passing the second upper vertical slide bar 21 is opened on the rear cross beam 4, and a second vertical sleeve is pre-embedded in the concrete at the rear bottom of the rectangular channel section 1, and the second lower vertical slide bar 22 extends into and is slidably connected in the second vertical sleeve; a lifting drive 25 connected to the top of the floating plate frame is provided on the bottom surface of the rear cross beam 4, and the lifting drive 25 adopts a hydraulic cylinder.

[0037] The floating plate frame includes a second rectangular cylinder 20 that is transparent from front to back, and at least one layer of wave-breaking plate 23 is horizontally arranged inside the second rectangular cylinder 20. The lower end of the second upper vertical sliding rod 21 is fixedly connected to the top surface of the second rectangular cylinder 20, and the upper end of the second lower vertical sliding rod 22 is fixedly connected to the bottom surface of the second rectangular cylinder 20.

[0038] A second limiting cap 24 located above the rear cross beam 4 is disposed at the upper end of the second upper vertical sliding rod 21 , and the outer diameter of the second limiting cap 24 is greater than the diameter of the second upper sliding hole.

[0039] The working principle of the water surface wave vertical suppression technology of the present invention is as follows: Based on the eddy current damping technology that has been successfully applied in structural vibration reduction, an eddy current damping wave elimination component is designed and developed. When the water body in the aqueduct produces vertical oscillations due to non-constant derivative waves, the metal frame will reciprocate up and down in the magnetic field formed after the two flat electromagnets 11 are energized, which will cut the magnetic flux lines and generate eddy currents. The eddy currents form an induced magnetic field, which interacts with the up and down fluctuations of the water body, thereby producing a damping effect that hinders the up and down reciprocating motion of the water body. By accurately designing the structural parameters of the grid-type eddy current damping wave elimination component 5, such as shape, size, material, and spacing between grids, the current of the flat electromagnet 11 is controlled, and then the eddy current intensity is controlled, and the size of the damping effect is accurately adjusted. Reasonable selection of the grid material ensures that the energy dissipation caused by the conductor resistance can effectively form a damping effect that suppresses the reciprocating motion of the water body.

[0040] The specific working process of the present invention is as follows: The front water surface fluctuation monitoring sensor 7 in the aqueduct transmits the monitored front water surface fluctuation signal in front of the rectangular channel section 1 to the front fluctuation signal processor 8. The front fluctuation signal processor 8 transmits the processed signal to the front PLC controller 9. The front PLC controller 9 controls the switches of the two flat electromagnets 11 to supply corresponding intensities of current according to the strength of the signal. A magnetic field is generated between the two flat electromagnets 11. When the metal frame moves up and down reciprocally in the magnetic field formed after the two flat electromagnets 11 are energized, it will cut the magnetic induction lines and generate eddy currents. The eddy currents form an induced magnetic field, which interacts with the up-and-down fluctuation of the water body, thereby generating a damping effect that hinders the up-and-down reciprocating movement of the water body, so as to effectively suppress the fluctuation of the water body.

[0041] After the grid-type eddy current damping wave elimination component 5 completes vortex elimination and wave suppression, there is still fluctuation in the water body in the rectangular channel section 1. At this time, the water surface fluctuation signal monitored by the rear water surface fluctuation monitoring sensor 17 is transmitted to the rear fluctuation signal processor 18. The rear fluctuation signal processor 18 transmits the processed signal to the rear PLC controller 19. The rear PLC controller 19 controls the start of the lifting drive 25 according to the strength of the signal. The telescopic rod of the lifting drive 25 moves up and down reciprocally, driving the floating plate frame and the wave elimination plate 23 to move up and down reciprocally in the fluctuating water. The top plate and bottom plate of the floating plate frame and the wave elimination plate 23 change the natural frequency of the water body vibration system, reduce the amplitude of the water body, and at the same time use the movement of the floating plate to increase the damping effect of the water body, realizing the dual-effect dissipation of the water body fluctuation energy, so as to effectively suppress the fluctuation of the water body. After the fluctuating water body passes through the grid-type eddy current damping wave elimination component 5 and the frequency-modulated floating plate wave elimination component 6 in the rectangular channel section 1, the fluctuation of the water body is basically eliminated.

[0042] The front water surface fluctuation monitoring sensor and the rear water surface fluctuation monitoring sensor adopt a pressure sensor, a vibration sensor, a float sensor and an optoelectronic sensor.

[0043] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that; modifications or equivalent replacements can still be made to the present invention, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. The combined wave-dissipating system for the water flow in the water conveyance channel, with the water flow direction in the aqueduct being from the front to the back, and a guide pier being arranged along the water flow direction in the middle of the rectangular channel section of the aqueduct, is characterized in that: It includes a front cross beam and a rear cross beam respectively arranged above the front port and the rear port of the rectangular channel section. There are two sets of grid-type eddy current damping wave-dissipating components located inside the rectangular channel section on the front cross beam, and the two sets of grid-type eddy current damping wave-dissipating components are respectively located on the left and right sides of the guide pier. There are two sets of frequency-modulated floating plate wave-dissipating components located inside the rectangular channel section on the rear cross beam, and the two sets of frequency-modulated floating plate wave-dissipating components are respectively located on the left and right sides of the guide pier.

2. The combined wave-dissipating system for water flow in a water conveyance channel according to claim 1, characterized in that: In front of the front cross beam in the aqueduct, a front water surface fluctuation monitoring sensor is arranged under the water surface. A front fluctuation signal processor and a front PLC controller are arranged on the front cross beam. The signal output end of the front water surface fluctuation monitoring sensor is connected to the signal input end of the front PLC controller through the front fluctuation signal processor, and the signal output end of the front PLC controller is connected to the signal input end of the grid-type eddy current damping wave-dissipating component.

3. The combined water wave dissipation system for water flow in a water conveyance channel according to claim 2, wherein: Each set of grid-type eddy current damping wave-dissipating components includes two metal frames and two flat plate electromagnets. The two flat plate electromagnets are respectively fixed on the side wall of the rectangular channel section and the side wall of the guide pier, and the two flat plate electromagnets are arranged corresponding to each other left and right. The two metal frames are arranged at intervals left and right between the two flat plate electromagnets. The upper and lower ends of the metal frame are respectively provided with a first upper vertical sliding rod and a first lower vertical sliding rod. A first upper sliding hole for passing through the first upper vertical sliding rod is opened on the front cross beam. A first vertical sleeve is embedded in the concrete at the bottom of the front side of the rectangular channel section, and the first lower vertical sliding rod extends into and is slidably connected in the first vertical sleeve. A support plate is arranged between the two metal frames, and the upper and lower ends of the support plate are respectively fixedly connected to the bottom surface of the front cross beam and the bottom surface of the rectangular channel section.

4. The water conveyance channel water flow combined wave dissipation system according to claim 3, characterized in that: The metal frame includes a first rectangular cylinder body that is transparent from front to back. At least one vertical grid plate parallel to the flat plate electromagnet is arranged inside the first rectangular cylinder body. The lower end of the first upper vertical sliding rod is fixedly connected to the top surface of the first rectangular cylinder body, and the upper end of the first lower vertical sliding rod is fixedly connected to the bottom surface of the first rectangular cylinder body.

5. The combined water wave dissipation system for water flow in a water conveyance channel according to claim 4, characterized in that: A first limit cap located above the front cross beam is arranged at the upper end of the first upper vertical sliding rod, and the outer diameter of the first limit cap is larger than the diameter of the first upper sliding hole.

6. The combined water wave dissipation system for water flow in a water conveyance channel according to claim 1, wherein: In the aqueduct, a rear water surface fluctuation monitoring sensor is arranged under the water surface behind the front cross beam and in front of the rear cross beam. A rear fluctuation signal processor and a rear PLC controller are arranged on the rear cross beam. The signal output end of the rear water surface fluctuation monitoring sensor is connected to the signal input end of the rear PLC controller through the rear fluctuation signal processor, and the signal output end of the rear PLC controller is connected to the signal input end of the frequency-modulated floating plate wave-dissipating component.

7. The combined water wave dissipation system for water flow in a water conveyance channel according to claim 6, characterized in that: Each set of frequency-modulated floating plate wave-dissipating components includes two floating plate frames arranged at intervals left and right. The upper and lower ends of the floating plate frame are respectively provided with a second upper vertical sliding rod and a second lower vertical sliding rod. A second upper sliding hole for passing through the second upper vertical sliding rod is opened on the rear cross beam. A second vertical sleeve is embedded in the concrete at the bottom of the rear side of the rectangular channel section, and the second lower vertical sliding rod extends into and is slidably connected in the second vertical sleeve.

8. The combined water wave dissipating system for the water flow in the water conveyance channel according to claim 7, characterized in that: The floating plate frame includes a second rectangular cylinder body that is transparent from front to back. At least one layer of wave-dissipating plates is horizontally arranged inside the second rectangular cylinder body. The lower end of the second upper vertical sliding rod is fixedly connected to the top surface of the second rectangular cylinder body, and the upper end of the second lower vertical sliding rod is fixedly connected to the bottom surface of the second rectangular cylinder body.

9. The combined water wave dissipation system for the water flow in the water conveyance channel according to claim 8, wherein: The upper end of the second upper vertical sliding rod is provided with a second limiting cap located above the rear cross beam, and the outer diameter of the second limiting cap is larger than the diameter of the second upper sliding hole.

Images