Channel wave dissipation device capable of self-adapting to water level

Abstract

The utility model relates to a self-adaptive water level channel wave dissipation device which comprises a rectangular frame floating in channel water in a semi-submersible mode, the width of the rectangular frame is matched with the water passing width of a water channel, and the rectangular frame is provided with a facility for restraining the rectangular frame from being washed away by water flow. A wave suppression facility combination is arranged on the frame in the water flow direction, the wave suppression facility combination comprises at least one blade plate rotary drum and at least one hollow horizontal wave suppression plate, the blade plate rotary drum comprises a hollow cylindrical drum body capable of rotating, and blade plates are evenly distributed on the outer circle face of the cylindrical drum body along the circumference. According to the utility model, the plurality of blade plate rotary drums, the horizontal wave suppression plates and the inclined wave suppression plates are combined together to form an assembly by utilizing the frame, the assembly can float along with the rising and falling of the water level, and the blade plate rotary drums can convert wave impact into rotary motion of the rotary drums when waves pass through so as to drive the blade plates on the rotary drums to crush the waves; and then the water surface is leveled by using the proper combination of the horizontal wave suppression plate and the inclined wave suppression plate, so that the safety and normal operation of long-distance channel water delivery are ensured.

Description

Technical Field

[0001] The utility model relates to a channel wave eliminating device with adaptive water level, which is a hydraulic facility and a device used for ensuring the safety and normal operation of channel water conveyance in long-distance water conveyance projects. Background Art

[0002] In long-distance water transfer projects, there are often buildings such as water intake gates, water diversion gates, regulating gates, waterfalls, and steep slopes. There is a water level difference between the upstream and downstream of these buildings, which is bound to cause downstream water level fluctuations (waves). The greater the water level difference, the more violent the downstream water level fluctuations, which will have an adverse impact on project operation, flow and water level monitoring. For example, in closed non-pressure water transfer tunnels and box culverts, excessive water level fluctuations will cause alternating open and full flow, causing cavitation and vibration, affecting the flow capacity and project safety. In open water transfer buildings such as aqueducts, excessive water level fluctuations will cause overflows, which will cause water loss and secondary hazards and safety hazards. Existing wave-breaking measures usually use concentrated or dispersed wave-breaking beams. Although this type of wave-breaking beam has a certain effect on eliminating waves in the canal to a certain extent, there is also a problem that floating debris in the water is easily intercepted and adsorbed by the concentrated wave-breaking beams, causing blockage. In winter, when there is ice in the water, ice jams and ice dams will form before and after the wave-breaking beams when the temperature drops, affecting water transfer safety and project safety. Distributed wave-breaking beams are better than centralized wave-breaking beams in terms of water flow patterns, but the length of the wave-breaking facilities is longer, which will significantly increase the project investment and land acquisition area. Centralized or decentralized wave-breaking beams have a common disadvantage, that is, there are blank areas (blind areas) in flow and water level, that is, there is always a certain flow and water level where the wave-breaking beam does not work or has a weak effect. In other words, since centralized or decentralized wave-breaking beams are fixedly installed, they can only play a role in wave breaking at a certain water level and flow. If the water level and flow are exceeded or lower than this, the wave-breaking effect will be greatly reduced. How to use highly adaptable wave-breaking facilities, low construction and facility costs, and achieve relatively high wave-breaking efficiency within a limited range is a problem that needs to be solved. Summary of the invention

[0003] In order to overcome the problems of the prior art, the utility model proposes a channel wave-breaking device with adaptive water level. The wave-breaking device is a set of devices composed of a blade drum, a flat plate and an inclined plate. The device is immersed in the water on the surface of the water and can rise and fall with the rise and fall of the water level to keep it floating on the water surface. The wave-breaking effect of the blade drum is applied, and simple facilities such as horizontal wave-suppressing plates and inclined wave-suppressing plates are used to quickly calm the large waves caused by sluices, waterfalls, steep slopes and other projects in long-distance water transfer projects, so as to ensure the safety and normal operation of downstream channels and facilities.

[0004] The purpose of the utility model is achieved as follows: a channel wave-breaking device with adaptive water level, comprising: a rectangular frame semi-submerged and floating in the channel water, the width of the rectangular frame being adapted to the water flow width of the channel and provided with facilities for restricting the rectangular frame from being washed away by the water flow; a wave suppression facility combination is arranged along the water flow direction of the frame, the wave suppression facility combination comprises at least one blade rotating drum and at least one hollow horizontal wave suppression plate, or comprises at least one blade rotating drum and at least one hollow horizontal wave suppression plate and at least one inclined wave suppression plate; the blade rotating drum comprises: a rotatable and hollow cylindrical cylinder body, the rotation axis of the cylindrical cylinder body being parallel to the channel water surface and perpendicular to the water flow direction in the channel, and at least four blades are evenly distributed along the circumference of the outer circular surface of the cylindrical cylinder.

[0005] Furthermore, the blade drum is provided with 8 blades forming a cross shape.

[0006] Furthermore, the blade drum is divided into a plurality of small blade drums along the direction of the rotating axis.

[0007] Furthermore, the rectangular frame includes: two left and right side rods along the water flow direction and two front and rear end rods perpendicular to the water flow direction, and the front and rear end rods are pull rods.

[0008] Furthermore, the facility for restricting the rectangular frame from being washed away by water flow comprises: at least two protruding blocks are respectively arranged on the left and right sides of the frame, which can be embedded in the grooves on the channel side walls and can move up and down along the grooves.

[0009] Furthermore, the groove is vertical or inclined forward or backward; the protrusion block is cylindrical, and the cylindrical rotation axis of the protrusion block is parallel to the horizontal plane and perpendicular to the water flow direction.

[0010] Furthermore, the wave suppression facility combination is as follows: a first blade rotating drum, a first horizontal wave suppression plate, a second blade rotating drum, a second horizontal wave suppression plate, and a third blade rotating drum are arranged in sequence along the water flow direction.

[0011] Furthermore, the wave suppression facility combination is: arranged in sequence along the water flow direction: a first blade rotating drum, a first horizontal wave suppression plate, an inclined wave suppression plate, a second horizontal wave suppression plate, a second blade rotating drum, a third horizontal wave suppression plate, and a third blade rotating drum.

[0012] Furthermore, the wave suppression facility combination is: arranged in sequence along the water flow direction: the first blade drum, the first horizontal wave suppression plate, the first inclined wave suppression plate, the second horizontal wave suppression plate, the second blade drum, the third horizontal wave suppression plate, the second inclined wave suppression plate, the fourth horizontal wave suppression plate, and the third blade drum.

[0013] The advantages and beneficial effects of the utility model are as follows: the utility model utilizes a frame to combine a plurality of blade drums, a horizontal wave suppression plate and an inclined wave suppression plate to form an assembly, and enables the assembly to float on the water surface and be immersed in the water as the water level rises and falls; the blade drum can convert the wave impact into the rotational motion of the drum when the water waves pass through, drive the blades on the drum to break the waves, and then use an appropriate combination of the horizontal wave suppression plate and the inclined wave suppression plate to smooth the water surface; through several blade drums and a plurality of wave suppression plates, the waves generated in the channel can be quickly smoothed to ensure the safety and normal operation of long-distance channel water transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural elevational schematic diagram of the device described in Embodiment 1 of the utility model;

[0016] Figure 2 It is a schematic structural plan view of the device described in Embodiment 1 of the present utility model;

[0017] Figure 3 It is a schematic diagram of the blade drum structure and a schematic diagram of the waves described in the first embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the vertical groove and raised block structure of the facility for restricting the rectangular frame from being washed away by water flow as described in the sixth embodiment of the utility model, Figure 2 Middle C direction view;

[0019] Figure 5 This is a schematic diagram of the structure of the forward-inclined groove and the raised block of the facility for restricting the rectangular frame from being washed away by water flow as described in the sixth embodiment of the utility model. Figure 2 Middle C direction view;

[0020] Figure 6 This is a schematic diagram of the structure of the backward-inclined groove and the raised block of the facility for restricting the rectangular frame from being washed away by the water flow as described in the sixth embodiment of the utility model. Figure 2 Middle C direction view;

[0021] Figure 7 It is the wave suppression facility combination without inclined wave suppression plates as described in the seventh embodiment of the utility model;

[0022] Figure 8 It is a wave suppression facility combination with two inclined wave suppression plates as described in the ninth embodiment of the utility model;

[0023] Fig. 9 It is a flow chart of the design method described in Embodiment 10 of the present utility model;

[0024] Fig.10 It is a schematic diagram of the planar structure of a plurality of wave-breaking devices arranged side by side as described in the tenth embodiment of the present utility model. DETAILED DESCRIPTION

[0025] Embodiment 1:

[0026] This embodiment is a channel wave elimination device with adaptive water level, such as Figure 1 , 2 , 3. This embodiment includes: a semi-submerged floating in a channel ( Figure 1 It is an elevation view that can show the bottom of the canal 011, Figure 2 is a plan view showing the side wall of the canal 012) a rectangular frame 1 in the water, the width of the rectangular frame is adapted to the water width K of the canal and is provided with a facility 2 to restrict the rectangular frame from being washed away by the water flow (see Figure 2 ); the frame is provided with a wave suppression facility combination 3 along the water flow direction, the wave suppression facility combination includes at least one blade rotating drum 301 and at least one hollow horizontal wave suppression plate 302, or includes at least one blade rotating drum and at least one hollow horizontal wave suppression plate and at least one inclined wave suppression plate 303; the blade rotating drum includes: a rotatable and hollow cylindrical cylinder 3011, the rotation axis 3012 of the cylindrical cylinder is parallel to the channel water surface and perpendicular to the water flow direction A in the channel, and at least four blades 3013 are evenly distributed along the circumference of the outer surface of the cylindrical cylinder, see Figure 3 .

[0027] The rectangular frame can be an integral rectangular frame, or a combination of two side bars and front and rear end bars, or a combination of four bars. The frame material can be made of light materials such as fiberglass, so that the wave-breaking device can float semi-submerged in the water.

[0028] There are many ways to restrain the rectangular frame from being washed away by water flow, such as rope mooring or guide troughing, where grooves are opened on both sides of the channel and protrusions are set on both sides of the frame so that the protrusions can move up and down in the grooves to adapt to changes in water levels.

[0029] The wave suppression facility combination is the core facility of this embodiment, which mainly includes a blade drum, a horizontal wave suppression plate and an inclined wave suppression plate.

[0030] The self-adaptation mentioned above means that the relative size relationship between buoyancy and gravity is used to enable the wave-breaking facilities to rise or fall with the change of water level in the channel, so as to achieve the purpose of automatic adjustment. Studies have shown that the fluctuation of waves is mainly concentrated in the upper layer of the water body, and more than 90% of the wave energy is concentrated in the water layer 2 to 3 times the wave height on the surface of the water body. The water surface wave-breaking and wave-suppression measures that adapt to the characteristics of wave energy distribution should be near the water surface to play the greatest wave-breaking effect.

[0031] For wave-breaking facilities, the incident wave energy is the sum of the reflected wave energy, the transmitted wave energy and the dissipated wave energy. To achieve the purpose of reducing wave energy, it is necessary to try to increase the energy of the reflected wave and the dissipated wave.

[0032] During the water delivery process, the water body has a certain flow rate. In addition to its own weight and buoyancy, the wave-breaking facilities are also subject to the combined effects of water flow and waves, and the stress conditions are relatively complex. The stress conditions of wave-breaking facilities are closely related to the wave height, wavelength, form, size and composition of the facilities themselves.

[0033] In actual engineering, flow rate changes are normal, so the water level and fluctuations also change accordingly. Especially when the flow rate changes, the fluctuations are more complicated, and numerical simulation is difficult to achieve. It can only be studied through hydraulic model tests.

[0034] Research shows that the larger the wave-blocking area of ​​the wave-breaking facility, the greater the wave reflection, and the greater the force on the wave-breaking facility. The wave-breaking facility floating in the water mainly moves up and down under the action of waves. When the wave period is small, as the wave-breaking device moves up and down, part of the waves will be broken, and part of the energy will be dissipated accordingly. When the wave period is large, the movement frequency of the wave-breaking facility is relatively reduced, and the waves are not easily broken, and the dissipation effect of the floating wave-breaking facility relative to the wave energy is weakened. This is because when the wavelength is longer, the wave has greater energy. It can be seen from this that the wave-facing side of the wave-breaking facility must have a certain wave-blocking area and be able to effectively break the waves. At the same time, the force on the wave-breaking facility itself should not be too large. Based on these three requirements, this embodiment innovatively proposes a new type of wave-breaking structure, called a blade drum. The main body of the blade drum is a hollow cylinder, and radial blades are arranged on the outer circumference of the cylinder, such as Figure 3 shown.

[0035] In order to effectively block and reflect waves, the height G of the water-facing surface of the wave suppression facility combination should be the same as the wave height H (the distance from the crest to the trough) so as to reduce the secondary waves after overtopping. In order to effectively break the waves, different phase differences are used to echo the wave characteristics, that is, radial blades are used. In order to reduce the force, the radial blades can be installed on a rotatable cylinder to form a blade rotating cylinder. The radial breaking cylinder consists of multiple blades of the same size and a hollow cylinder. The blades are radially and symmetrically distributed on the cylinder. The height h of the blades is less than or equal to one-half of the maximum wave height H. The envelope diameter F of the outer edge of the blade should be the same as or close to the wave height, see Figure 3 , the outer diameter of the cylinder d1 = d + δ , where d is the inner diameter of the cylinder, determined by the buoyancy of the structure, δ is the wall thickness of the cylinder material.

[0036] like Figure 3As shown in the figure, when a blade rotates to the highest point of the drum, the blade is perpendicular to the horizontal plane and its height is h. The height h of a single blade should be less than or equal to half of the maximum wave height H. The ideal state can be expressed by the formula: h=H / 2-d1, such as Figure 3 shown.

[0037] Figure 3 The D in the figure represents the height of the clean water surface in the channel, and the E represents the distance from the plane where the rotating axis of the blade drum is located to the bottom of the channel, that is, the height of the horizontal center plane of the wave-breaking device in the channel. Figure 3 The ideal state of the wave-breaking device floating in the water is shown: the cylindrical body in the middle of the blade drum is immersed in the water, that is, E+d1 / 2=D. The more ideal state is E=D, that is, the horizontal center plane of the wave-breaking device coincides with the static water level plane of the channel, and half of the cylindrical body is immersed in the water and half is above the water surface. What should be avoided is that the cylindrical body floats on the water surface, that is, E=D+d1 / 2.

[0038] The blade drum rotates under the action of water flow and waves, and the blades on it rotate accordingly. In this way, no matter what the characteristics of the incident wave are and how it is incident, the wave-breaking body can continuously block, reflect and break the waves.

[0039] When a blade is impacted by water flow and waves, it will rotate in the direction of the force, and the other blade corresponding to it will inevitably be subjected to the water reaction force in the opposite direction. It is the mechanism of action and reaction that makes the force on the cylinder basically balanced. The breaking of waves will cause impact on the structure, but because the blade drum can rotate, the force of water flow on the blade drum is reduced, and the force between the various wave-breaking facility components is also reduced, which is beneficial to the safety of the structure.

[0040] To increase the wave-breaking effect, multiple blade drums can be used in succession, with horizontal wave-suppression plates set between them. Figure 1 , which has a significant suppression and attenuation effect on waves.

[0041] The blade drum and the horizontal suppression plate are hollow, with holes reserved on them for water or coarse sand to be injected into them, so as to flexibly, effectively and accurately control the buoyancy, so that the wave-breaking device is partially immersed in the water body and avoids floating completely above the water surface. The diameter of the blade drum (affecting the space inside the cylinder) and the thickness of the horizontal wave suppression plate (affecting the space inside the plate) should meet the buoyancy requirements of the entire device: that is, the ratio of the distance E from the central horizontal plane 101 of the wave-breaking device to the bottom of the channel to the water depth D is between 0.85 and 0.95 (see Figure 1 ) to ensure the safety, reliability and efficient wave-breaking performance of the floating body itself.

[0042] In order to reduce the amplitude of the wave, an inclined wave suppression board is installed. The vertical height G of the inclined wave suppression board (which is the water-facing surface of the inclined wave suppression board and also the water-facing surface of the entire wave suppression facility combination) should be less than or equal to the wave height, and the installation angle α 45 degrees (see Figure 1 The angle of the horizontal plane rotating clockwise forms the placement angle α ). The experiment shows that after the inclined wave suppression plate is installed, the water level fluctuation amplitude is significantly improved. The water level fluctuation amplitude is large upstream of the inclined wave suppression plate, and there is obvious oscillation on the water surface; the water level downstream of the inclined wave suppression plate is relatively stable, and the fluctuation amplitude is significantly reduced.

[0043] To further reduce the fluctuation, multiple inclined wave suppression plates can be set along the direction of the water flow, and the shapes and sizes of each inclined wave suppression plate are exactly the same. Experiments show that before the water flows through the inclined wave suppression plates, the water surface is obviously wavy, with obvious peaks and troughs. After passing through the first inclined wave suppression plate, the fluctuation amplitude is significantly reduced. After passing through the second inclined wave suppression plate, the water surface is flat and the waves are not visible to the naked eye.

[0044] The wave-breaking device described in this embodiment is composed of a blade drum, a horizontal wave-suppressing plate and an inclined wave-suppressing plate. The cylinder body and the horizontal wave-suppressing plate of the blade drum are hollow structures, and holes are set on the surface to facilitate the injection of water or objects such as coarse sand, so as to control the buoyancy and determine the draft. The blade drum is composed of a plurality of blades of the same size and a hollow cylinder. The blades are radially and symmetrically distributed on the cylinder, and the diameter of the cylinder is determined by the buoyancy of the structure. The blade drum can rotate, and can continuously block, reflect and break waves with different characteristics and different incident modes. The blade drum can be cut into multiple pieces along the rotating axis of the cylinder, that is, multiple blade drums can be installed side by side.

[0045] Wave-breaking facilities such as blade drums, horizontal wave-suppression plates, and inclined wave-suppression plates can be selectively installed in an interlaced manner according to the various waves generated by the upstream channels. The components are staggered front and back, changing the movement direction of water particles many times, causing them to collide with each other, generating vortices, falling currents, and pick-up currents, thereby consuming water energy and achieving the purpose of reducing wave energy and fluctuation amplitude.

[0046] Wave-breaking facilities such as blade drums, horizontal wave-suppression plates, inclined wave-suppression plates, and frames can be made of light and hard materials such as sand-reinforced fiberglass, which can meet the requirements of strength and rigidity as well as corrosion resistance. In particular, they have the advantages of strong shape plasticity and easy maintenance.

[0047] It should be noted that the determination of "front", "back", "left" and "right" in this embodiment and the following embodiments is based on Figures 1 to 8 , 10, the water flow is as shown by the direction of arrow A in each figure, the left side of the figure is the front, the right side is the back, and the left and right sides are determined according to the direction of water flow (up is left, down is right).

[0048] Embodiment 2:

[0049] This embodiment is an improvement of the first embodiment, and is a refinement of the blade drum of the first embodiment. The blade drum described in this embodiment is provided with 8 blades, forming a cross shape.

[0050] Experiments show that the wave-breaking effect is better when the blades are set to 8, and too many or too few blades will affect the wave-breaking effect.

[0051] Embodiment three:

[0052] The present embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the blade drum. The blade drum described in the present embodiment is divided into a plurality of small blade drums along the direction of the rotating axis.

[0053] For reasons of processing and installation, the blade drum can be cut into multiple pieces along the drum rotation axis, such as Figure 2 As shown, the blade drum is cut into three parts along the rotation direction, each with a width of N (see Figure 2 ), the width of the entire blade drum along the rotating axis is 3N. The blade drum cut in this way is relatively small in size and easy to process and install. However, the blade drum should not be cut too much along the rotating axis, otherwise it will affect the wave elimination effect.

[0054] Embodiment 4:

[0055] The present embodiment is an improvement of the above embodiment, and is a refinement of the rectangular frame of the above embodiment. The rectangular frame described in the present embodiment includes: two left and right side rods in the direction of water flow and two front and rear end rods in the direction perpendicular to the water flow, and the front and rear end rods are pull rods.

[0056] Since the wave-breaking device as a whole is required to float semi-submerged, there are certain requirements for the overall buoyancy. Therefore, the side rods on the left and right sides can be hollow or solid, which is mainly determined according to the buoyancy of the entire device.

[0057] Since there is a hard support between the two side bars, such as a horizontal wave damping plate or an inclined wave damping plate, the front and rear end bars can use tie rods. The tie rod is a thinner component that pulls the left and right side bars together to form a stable quadrilateral structure under the support of the horizontal wave damping plate and the inclined wave damping plate.

[0058] Embodiment five:

[0059] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the facility for restricting the rectangular frame from being washed away by water flow. The facility for restricting the rectangular frame from being washed away by water flow described in this embodiment includes: at least two protruding blocks 202 are respectively arranged on the left and right sides of the frame, which can be embedded in the groove 201 on the side wall of the channel and can move up and down along the groove, such as Figure 2shown.

[0060] Since the wave-breaking device is semi-submerged and floats in the water, it is in a semi-free state. The frame width of the wave-breaking device is substantially equal to or slightly smaller than the width of the channel. Therefore, the left-right movement of the wave-breaking device is constrained and it cannot move left-right. However, the forward and backward movement along the direction of the water flow requires special facilities to constrain it. In this embodiment, vertical or inclined grooves are opened on the side walls of the channel, and some protrusions are fixedly provided on the outside of the frame of the wave-breaking device. These protrusions can move up and down along the grooves, but cannot move forward and backward along the direction of the water flow, thereby limiting the forward and backward movement of the protrusions. Since the protrusions are fixed on the frame, the frame and even the entire wave-breaking device are restricted from forward and backward movement, and can only move up and down with the rise and fall of the water level.

[0061] In order to reduce the friction between the protrusion and the groove, the protrusion can be designed to be cylindrical and can rotate, similar to a roller rolling in the groove. The rotation axis 203 of the cylindrical protrusion can be colinear with the rotation axis of the blade drum, or it can be non-colinear, such as Figure 3 shown.

[0062] Embodiment six:

[0063] This embodiment is an improvement of the above embodiment, and is a refinement of the groove of the above embodiment regarding the facility for restricting the rectangular frame from being washed away by the water flow. The groove described in this embodiment is vertical (such as Figure 4 as shown) or tilted forward (as Figure 5 as shown) or tilted backwards (as shown Figure 6 As shown); the protruding block is cylindrical, and the cylindrical rotation axis of the protruding block is parallel to the horizontal plane and perpendicular to the water flow direction.

[0064] This embodiment designs three types of grooves: vertical, forward tilted, and backward tilted. Vertical means that the groove rotates 90 degrees clockwise along the horizontal plane, while forward tilted means that the angle of the groove rotating clockwise along the horizontal plane is greater than 45 degrees and less than 90 degrees, which can generally be selected as 65 degrees to 75 degrees, and backward tilted means that the angle of the groove rotating clockwise along the horizontal plane is greater than 90 degrees and less than 135 degrees, which can generally be selected as 105 degrees to 115 degrees.

[0065] The cylindrical protrusion block is equivalent to a roller, and the roller rolls in the groove, which can effectively prevent the wave-breaking device from being stuck when moving up and down, and being unable to float up and down to adapt to changes in water levels.

[0066] Embodiment seven:

[0067] This embodiment is an improvement of the above embodiment, and is a refinement of the wave suppression facilities of the above embodiment. The wave suppression facilities described in this embodiment are arranged in sequence along the water flow direction: a first blade rotating drum, a first horizontal wave suppression plate, a second blade rotating drum, a second horizontal wave suppression plate, and a third blade rotating drum, such as Figure 7 shown.

[0068] This is a wave suppression facility combination without inclined wave suppression plates, using three blade drums and two horizontal wave suppression plates. This combination has a good effect on waves generated when the upstream and downstream water level difference is small or when the gate is simply opened. The structure is relatively simple and the cost is low.

[0069] Embodiment eight:

[0070] This embodiment is an improvement of the above embodiment, and is a refinement of the wave suppression facilities in the above embodiment. The wave suppression facilities described in this embodiment are arranged in sequence along the water flow direction: a first blade rotating drum, a first horizontal wave suppression plate, an inclined wave suppression plate, a second horizontal wave suppression plate, a second blade rotating drum, a third horizontal wave suppression plate, and a third blade rotating drum, such as Figure 1 shown.

[0071] This is a wave suppression facility combination of an inclined wave suppression plate, three blade drums and three horizontal wave suppression plates. This combination has a good effect on the waves generated when the upstream and downstream water level difference is large or the gate with a small water drop is opened. The structure is relatively simple and the cost is low.

[0072] Embodiment nine:

[0073] This embodiment is an improvement of the above embodiment, and is a refinement of the wave suppression facilities in the above embodiment. The wave suppression facilities described in this embodiment are arranged in sequence along the water flow direction: a first blade rotating drum, a first horizontal wave suppression plate, a first inclined wave suppression plate, a second horizontal wave suppression plate, a second blade rotating drum, a third horizontal wave suppression plate, a second inclined wave suppression plate, a fourth horizontal wave suppression plate, and a third blade rotating drum, such as Figure 8 shown.

[0074] This facility combination is equipped with three blade drums, two inclined wave-suppression plates, and four horizontal wave-suppression plates. The cost is relatively high, but it has a good suppressing effect on the waves generated by the opening of the gate when there is a large water level difference between the upstream and downstream or a large water drop.

[0075] Embodiment ten:

[0076] This embodiment is a design method for the adaptive water level channel wave elimination device described in the above embodiment. The steps of the design method are as follows: Fig. 9 As shown:

[0077] Step 1, determine the width of the wave-breaking device: determine that the width of the rectangular frame of the wave-breaking device is equal to the width of the channel according to the width of the channel. If the channel width is large, divide the channel width into the widths of several wave-breaking devices, and set multiple wave-breaking devices side by side. The wave-breaking devices set side by side are either anchored by isolation piers or ropes to prevent the wave-breaking devices from being washed away by the water flow.

[0078] When the channel is narrow, only one wave-breaking device can be set. When the channel is wide, the channel can be divided into multiple flow channels, and diversion piers can be set like gates. In this way, a wave-breaking device 03 with a moderate width is set between the diversion piers 02. Fig.10 As shown, a diversion pier is set in the middle of a channel, and a wave-breaking device is set on both sides of the diversion pier.

[0079] Step 2, determining the width of the blade drum and the wave suppression plate: setting the width of the blade drum, as well as the width of the horizontal wave suppression plate and the inclined wave suppression plate according to the width of the rectangular frame; the width of the blade drum is either set to be consistent with the width of the frame, or the width of the frame is divided into equal parts to form a multi-section blade drum;

[0080] The width of the blade drum is actually the length of the rotation centerline of the cylindrical drum. For the convenience of manufacturing and installation, the cylindrical drum can be cut into several sections along the rotation centerline, but not too many sections, as too much cutting will weaken the wave-breaking effect.

[0081] Step 3, determine the diameter of the blade drum: determine the outer edge envelope diameter F of the blade drum according to the maximum wave height that can appear in the current channel, the outer edge envelope diameter F of the blade drum is less than or equal to the maximum wave height H of the wave; the blade height h of the blade drum is less than or equal to 1 / 2 of the maximum wave height H.

[0082] The design of the blade drum mainly considers the size of the space inside the cylinder, the diameter F of the outer edge of the blade, the outer diameter d1 and the inner diameter d of the middle cylindrical drum and the height h of the blade (see Figure 3 ) can be properly adjusted to meet the buoyancy requirements and wave breaking requirements.

[0083] Step 4, determine the water-facing height of the inclined wave suppression board: determine the water-facing height of the inclined wave suppression board according to the maximum wave height that can occur in the current channel; the inclination angle of the inclined wave suppression board is 30 to 50 degrees clockwise, and the water-facing height of the inclined wave suppression board is less than or equal to the maximum wave height.

[0084] The water-facing height of the inclined wave-suppression plate is the height G of the projection of the inclined wave-suppression plate on the plane perpendicular to the water flow direction (see Figure 1 ), this height should be less than the height of the maximum wave, or equal to the envelope diameter of the outer edge of the blade of the blade rotor.

[0085] Step 5, determine the length of the wave suppression facility combination: determine the length of the wave suppression facility combination according to the wavelength of the wave, and the ratio of the length B of the wave suppression facility combination to the wave wavelength L is: 1.5~2.0.

[0086] When the length B of the wave-breaking device along the water flow direction is small (see Figure 2 ), under the action of waves, it is easy to follow the flow and form secondary waves; at the same time, its lateral motion amplitude is also large. Therefore, the length B of the floating structure in the direction of the water flow and the wave period L (see Figure 3 ) relationship, namely B / L, was experimentally analyzed. The test showed that the larger the B / L, the greater the energy consumption and the better the wave-breaking effect. When B / L is 1.5-2.0, the transmission coefficient (the ratio of the wave height before and after the wave-breaking facility) is 0.4-0.5, the sway is not large, and the amplitude is relatively stable.

[0087] The length B of the wave-breaking device in the direction of the water flow is determined by the following principles: meeting the wave-breaking requirements, reducing the swaying, and meeting the anti-floating requirements. The diameter of the blade drum, the thickness and length of the horizontal wave-breaking plate must meet the above requirements at the same time, and the maximum value is taken. In the design, it can be determined by trial calculation.

[0088] Step 6, determine the combination of wave suppression facilities: determine the number, order, and combination of blade drums, horizontal wave suppression plates, and inclined wave suppression plates based on wave size and wave form.

[0089] Since the channel is artificially constructed, the waves generated in the channel are usually formed by hydraulic facilities such as gates and water drops. The size and form of the waves generated are relatively fixed. Therefore, a wave suppression combination can be designed according to the characteristics of the waves to achieve the best wave elimination effect.

[0090] Step 7, determine the length of the horizontal wave suppression board and the inclined wave suppression board: determine the length of the horizontal wave suppression board and the length of the inclined wave suppression board projected on the horizontal plane according to the length of the wave suppression facility combination and the wave suppression facility combination.

[0091] Once the length B of the wave-breaking device along the water flow direction and the number of blade drums and the number of inclined wave suppression plates and horizontal wave suppression plates in the wave suppression facility combination are determined, the outer edge envelope diameter of the blade drum and the length of the projection of the inclined wave suppression plates and horizontal wave suppression plates on the horizontal plane along the water flow direction can be determined.

[0092] Step 8, determining the suspension degree of the wave-breaking device: determining the suspension depth of the wave-breaking device in water according to the overall specific gravity of the device, the water depth ratio between the plane of the rectangular frame and the channel water level plane is between 0.85 and 0.95.

[0093] When the outer edge envelope diameter of the blade drum is determined, the height of the blade and the drum diameter, including the diameter of the inner space, can be determined. After determining these dimensions, the length and width of the horizontal wave suppression plate and the dimensions of the inner space can be determined. The overall buoyancy of the wave suppression device can be calculated through the dimensions of the cylinder interior and the internal space dimensions of the horizontal wave suppression plate, as well as the overall weight of the wave suppression device, and the overall weight of the wave suppression device can be adjusted according to the buoyancy to meet the requirements of the wave suppression device being suspended in the water flow.

[0094] Finally, it should be noted that the above is only used to illustrate the technical solution of the utility model and is not a limitation. Although the utility model has been described in detail with reference to the preferred arrangement scheme, ordinary technicians in the field should understand that the technical solution of the utility model (such as the overall shape of the wave-breaking device, the state of the channel, the material, etc.) can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A channel wave elimination device with adaptive water level, characterized in that: include: A rectangular frame semi-submerged and floating in the channel water, wherein the width of the rectangular frame is adapted to the water flow width of the channel and is provided with facilities for restricting the rectangular frame from being washed away by the water flow; a wave suppression facility combination is arranged on the frame along the water flow direction, wherein the wave suppression facility combination comprises at least one blade rotating drum and at least one hollow horizontal wave suppression plate, or comprises at least one blade rotating drum and at least one hollow horizontal wave suppression plate and at least one inclined wave suppression plate; the blade rotating drum comprises: a rotatable and hollow cylindrical body, wherein the rotation axis of the cylindrical body is parallel to the channel water surface and perpendicular to the water flow direction in the channel, and at least four blades are evenly distributed along the circumference of the outer circumference of the cylindrical body.

2. The wave-breaking device according to claim 1, characterized in that: The blade rotating drum is provided with 8 blades, forming a cross shape.

3. The wave-breaking device according to claim 2, characterized in that: The blade plate rotating drum is divided into a plurality of small blade plate rotating drums along the direction of the rotating axis.

4. The wave-breaking device according to claim 3, characterized in that: The rectangular frame comprises: two left and right side bars in the direction of water flow and two front and rear end bars in the direction perpendicular to the water flow, and the front and rear end bars are pull rods.

5. The wave-breaking device according to claim 4, characterized in that: The facility for restricting the rectangular frame from being washed away by water flow comprises: at least two protruding blocks are respectively arranged on the left and right sides of the frame, which can be embedded in the grooves on the channel side walls and can move up and down along the grooves.

6. The wave-breaking device according to claim 5, characterized in that: The groove is vertical or inclined forward or backward; the protruding block is cylindrical, and the cylindrical rotation axis of the protruding block is parallel to the horizontal plane and perpendicular to the water flow direction.

7. The wave-breaking device according to claim 6, characterized in that: The wave suppression facility combination is as follows: a first blade rotating drum, a first horizontal wave suppression plate, a second blade rotating drum, a second horizontal wave suppression plate, and a third blade rotating drum are arranged in sequence along the water flow direction.

8. The wave-breaking device according to claim 6, characterized in that: The wave suppression facility combination is as follows: the first blade rotating drum, the first horizontal wave suppression plate, the inclined wave suppression plate, the second horizontal wave suppression plate, the second blade rotating drum, the third horizontal wave suppression plate, and the third blade rotating drum are arranged in sequence along the water flow direction.

9. The wave-breaking device according to claim 6, characterized in that: The wave suppression facility combination is as follows: arranged in sequence along the water flow direction: the first blade rotating drum, the first horizontal wave suppression plate, the first inclined wave suppression plate, the second horizontal wave suppression plate, the second blade rotating drum, the third horizontal wave suppression plate, the second inclined wave suppression plate, the fourth horizontal wave suppression plate, and the third blade rotating drum.

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