An adaptive rectification skewback device applied to urban curved river channel and a working method thereof

Abstract

The application provides a self-adaptive rectifying skewback device applied to a curved urban river channel and a working method thereof. The device comprises a rectifying skewback device of a rectifying and energy-dissipating area arranged at a bend of the curved river channel; further comprises a height adjusting mechanism for automatically adjusting the water level height of the rectifying skewback device in water according to different water level heights in the curved river channel; the height adjusting mechanism comprises a water level information acquisition module for acquiring water level and water depth information near the rectifying skewback device; a height lifting mechanism arranged between the rectifying skewback device and the riverbed bottom; and a control module with a signal input end connected with the water level information acquisition module and a signal output end connected with the height lifting mechanism. The device adjusts the water flow structure of the bend, avoids the scouring of the concave bank and the silting of the convex bank, purifies water quality by using aquatic vegetation, increases the landscape effect of the river channel, and has the functions of self-adaptive intelligent adjustment of river flow uniformity and water environment restoration.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering technology, specifically to an adaptive rectifier sill device applied to urban meandering waterways. Background Technology

[0002] In urban or plain areas, the flow of water through bends is often slow. When the water flows through a bend, it creates a complex flow structure, which intensifies the transport of sediment across the cross-section. This causes the concave bank to be continuously eroded and the convex bank to be continuously silted up, increasing the curvature of the river channel, endangering the stability and safety of the embankments, and leading to phenomena such as river diversion.

[0003] When water flows through a bend, it is subjected to the combined effects of gravity and centrifugal inertial force. In addition to the longitudinal velocity (perpendicular to the water cross-section), the water also has radial and vertical velocities. As these flows intertwine, a transverse circulation is generated in the river cross-section (the surface water flows towards the concave bank, and the bottom water flows towards the convex bank).

[0004] For meandering rivers in urban or plain areas, in order to avoid further erosion and siltation on the concave and convex banks, and in conjunction with the construction of river ecological landscape, an adaptive flow-regulating inclined sill device is provided for use in urban meandering rivers. It can also be combined with the aquatic vegetation on the upper part to adjust the water flow, and has the functions of flow regulation, improving the aquatic ecological environment and enhancing the river landscape elements. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing an adaptive flow-regulating sill device and its operating method for use in urban meandering waterways. This device can better homogenize the water flow in bends, preventing further erosion and siltation, while also meeting people's aesthetic needs and landscape requirements.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An adaptive flow-rectifying sill device for use in urban meandering waterways includes:

[0008] A rectifier sill device is installed in the rectifier energy dissipation zone at the bend of a curved river channel.

[0009] It also includes a height adjustment mechanism for automatically adjusting the water level of the rectifier sill device in the water according to the different water levels in the meandering river channel, so that the rectifier sill device operates at the optimal water level. The height adjustment mechanism includes:

[0010] The water level information acquisition module is used to collect water level and water depth information near the rectifier sill device;

[0011] A height lifting mechanism is installed between the rectifier ramp and the bottom of the riverbed;

[0012] The control module has its signal input terminal connected to the water level information acquisition module and its signal output terminal connected to the height lifting mechanism.

[0013] Furthermore, the height lifting mechanism includes:

[0014] The fixed screw is arranged vertically, and its bottom end is fixedly connected to the bottom of the riverbed;

[0015] The transmission screw is helically sleeved on the upper outer side of the fixed screw and connected to the rectifier sill device through a bearing. A driven gear is coaxially fixedly connected to the outside of the transmission screw, and the driven gear is connected to the rectifier sill device through a limiting mechanism.

[0016] The driving gear meshes with the driven gear. The driving gear is mounted on the drive shaft of the first motor, and the first motor is fixedly mounted on the rectifier sill device.

[0017] The first motor drives the shaft to rotate, which in turn drives the driven gear to rotate via the driving gear. The rotation of the driven gear in turn drives the transmission screw to rotate relative to the fixed screw and move vertically along the axis of the fixed screw, thereby driving the entire rectifier sill device to move up and down.

[0018] Furthermore, the bottom of the rectifier sill device is provided with two sets of height lifting mechanisms at both ends along the water flow direction. Each set of height lifting mechanisms includes two fixed screws, which are respectively arranged on the left and right sides of the rectifier sill device. The upper part of each fixed screw is connected to a transmission screw, namely the first transmission screw and the second transmission screw. The first transmission screw meshes with the driving gear through a first driven gear, and the second transmission screw rotates synchronously with the first driven gear through a second driven gear and a gear transmission belt.

[0019] Furthermore, the bottom end of the fixing screw is provided with a tapered fixing rod that inserts into the bottom of the riverbed.

[0020] Furthermore, the rectifier sill device includes a box with a trapezoidal longitudinal section.

[0021] Furthermore, it also includes:

[0022] The plant cultivation box floats on the water surface via a bottom floating plate;

[0023] A limiting mechanism, connected between the plant cultivation box and the rectifier sill device, is used to limit the plant cultivation box directly above the rectifier sill device, comprising:

[0024] The support frame is fixedly connected to the bottom of the rectifier sill device, and the support frame is provided with a vertically arranged limiting groove;

[0025] A limiting slide buckle is fixedly connected to the plant cultivation box, and the limiting slide buckle is slidably connected in the limiting slide groove.

[0026] Furthermore, it also includes:

[0027] The second motor is fixedly connected to the rectifier sill device, and the drive shaft of the second motor is arranged horizontally and coaxially connected to a long rod.

[0028] A rope is wound around the long rod at one end and connected to a thin rod between the limiting slip and the rectifier sill device at the other end. The drive shaft of the second motor drives the long rod to rotate, thereby fine-tuning the floating height of the plant cultivation box.

[0029] Furthermore, the first motor is a stepper motor.

[0030] This invention further discloses a working method for the adaptive rectifier sill device applied to urban meandering waterways, comprising the following steps:

[0031] S1. Arrange the rectifier ramp device from the connection between the straight section and the bend at the riverbed inlet to the connection between the bend and the straight section at the riverbed outlet.

[0032] The distance H between the center of the box structure of the inclined sill device and the bottom of the riverbed m ,

[0033] H m =0.55(sinα) -0.80 H,

[0034] In the formula: α is the inclination angle of the concave bank, and H is the water depth of the riverbed;

[0035] S2. When the riverbed water depth near the rectifier sill device changes from H1 to H2, the water level information acquisition module will record the center position H of the rectifier sill device's box structure before the water level change. m1 The input is received by the control module, which calculates and processes the water depth. The output then shows the center position H of the rectifier sill device's casing structure after the water level change. m2 The first motor drive shaft is controlled to rotate, causing the rectifier sill device housing structure to adjust its height longitudinally, changing the center position of the rectifier sill device housing structure from H... m1 Move to H m2 This is to ensure that the rectifier sill device operates at the optimal water level.

[0036] Beneficial effects:

[0037] First: This invention provides an adaptive flow straightening sill device for use in urban meandering rivers. It can not only homogenize the water flow and avoid further river scouring and siltation, but also, due to the effect of vegetation, intercept a large amount of suspended sediment particles, which increases the amount of sediment on the concave bank and, due to the flow-lifting effect on the convex bank, wash away the sediment that was originally deposited, thereby improving the riverbed structure.

[0038] Second: The present invention provides an adaptive flow-regulating sill device for use in urban meandering waterways. The first motor, combined with water level information, raises and lowers the flow-regulating sill device to ensure that the flow-regulating sill device operates at the optimal water level, thereby achieving the best water flow adjustment effect.

[0039] Third: The present invention provides an adaptive flow straightening sill device for use in urban meandering rivers. While homogenizing the river flow and preventing further scouring and siltation, the ornamental aquatic vegetation provides a landscape effect that can be appreciated by people. This satisfies the idea of ​​combining ecological protection and water conservancy engineering. It not only helps to promote the homogenization of the flow in bends, but also has the functions of straightening, improving the aquatic ecological environment, and enhancing the river landscape elements. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the longitudinal section of the rectifier sill structure described in this invention;

[0041] Figure 2 This is a schematic diagram of the cross-sectional structure of the rectifier sill structure described in this invention;

[0042] Figure 3 This is a structural diagram of the upper part of the plant cultivation box and device of the present invention;

[0043] Figure 4 This is an enlarged view of part A of the present invention;

[0044] Figure 5 This is an enlarged view of part B of the present invention;

[0045] Figure 6 This is a schematic diagram showing the positions of the bearing base, transmission screw, and fixing screw of the present invention;

[0046] Figure 7 This is a schematic diagram (top view) of the planar arrangement of the multiple sets of rectifier ramps in the bend section of the present invention;

[0047] Figure 8 The distribution pattern of longitudinal velocity profile on the concave bank of the bend;

[0048] In the diagram: 1 is ornamental vegetation, 2 is water level information acquisition module, 3 is control module, 4 is plant cultivation box, 5 is the housing of the rectifier sill device, 6 is fixing screw, 7 is gear transmission belt, 8 is conical fixing rod, 9 is driving gear, 10 is first driven gear, 11 is second driven gear, 12 is first transmission screw, 13 is second transmission screw, 14 is first motor, 15 is rectifier sill device, 16 is bend inlet, 17 is bend outlet, 18 is concave bank of bend, 19 is convex bank of bend, 20 is water surface, 21 is riverbed, 22 is second motor, 23 is long rod, 24 is float plate, 25 is limiting slip, 26 is limiting groove, 27 is rope, 28 is thin rod, 29 is bearing base, D is water flow width, D1 is width of rectifier energy dissipation zone, D2 is width of flow zone near convex bank, H is riverbed water depth. m S0 is the distance from the bottom of the riverbed to the box structure of the sill device; S1 is the height of the sill device box; S2 is the length of the sill device box; S3 is the longitudinal plane section of the sill device box; S4 is the longitudinal slope section of the sill device box; S5 is the longitudinal distance between two adjacent sill devices; S6 is the lateral distance between two adjacent sill devices; R c The radius is the centerline radius of the curve. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0050] The working principle of this invention is:

[0051] When the water flow enters the bend of the river after passing through the straight section at the riverbed inlet, the multiple sets of rectifying sill devices in the rectification and energy dissipation zone are equivalent to artificially raising the concave bank side. By applying lateral force to the water flow in the bend, the centrifugal inertial force on the water flow is balanced. The sill structure will push the water flow with longitudinal velocity toward the convex bank. Aquatic vegetation can intercept sediment particles and generate considerable resistance to the water flow.

[0052] Reference Figure 1-6 An adaptive flow straightening sill device for use in urban meandering waterways. The device consists of four fixed rods inserted into the riverbed and a box-shaped flow straightening sill device with a trapezoidal cross-section. The box-shaped structure of the flow straightening sill device 15 is divided into inner and outer boxes. The inner box is a plant cultivation box 4, and the outer box is the box-shaped flow straightening sill device 5.

[0053] The lower part is a fixed rod inserted into the riverbed, with a tapered fixed rod 8 at the bottom and a fixed screw 6 at the top.

[0054] The outer rectifier sill device housing 5 has a through-hole in the middle, and the inner plant cultivation box 4 consists of a lower floating plate layer and an upper plant cultivation layer. Limiting latches 25 are fixedly connected to both ends of the plant cultivation box 4, and the limiting latches 25 are restricted to moving up and down within limiting grooves 26. The limiting grooves 26 are fixedly connected to the rectifier sill device housing 5 and penetrate the upper surface of the rectifier sill device housing 5.

[0055] Ornamental plants are planted directly in the plant cultivation box 4.

[0056] The limiting latch 25 is fixedly connected to the two ends of the plant cultivation box 4 by thin rods 28, and ropes 27 are wound around the thin rods 28. The other end of the ropes 27 is wound around the long rod 23 on the right end of the second motor 22. The second motor 22 is fixedly connected to the box body 5 of the rectifier sill device.

[0057] It also includes a height lifting mechanism consisting of a first motor 14, a driving gear 9, a first driven gear 10, a second driven gear 11, a fixed screw 6, a first transmission screw 12, a second transmission screw 13, and a gear transmission belt 7, which is installed inside the housing 5 of the rectifier sill device.

[0058] The height adjustment mechanism is used to control the height change of the outer box structure of the rectifier sill device 15 in the water. The first motor 14 is located at the bottom of the box 5 of the rectifier sill device. The rotation of the drive shaft of the first motor 14 is controlled by the control module 3, so that the box structure of the rectifier sill device 15 can be adjusted vertically up and down.

[0059] The driving gear 9 is fixed to the drive shaft of the first motor 14 and rotates as the drive shaft of the first motor 14 rotates. The first driven gear 10 is fixedly connected to the first transmission screw 12 and meshes with the driving gear 9. The rotation of the driving gear 9 drives the first driven gear 10 to rotate, and the rotation of the first driven gear 10 drives the first transmission screw 12 to rotate. The first transmission screw 12 and the second transmission screw 13 are cylindrical rods with internal threaded holes and mesh with the fixed screw 6.

[0060] The gear transmission belt is located outside the driving gear 9 and the first driven gear 10, driving the second driven gear 11 to rotate. The rotation of the second driven gear 11 drives the second transmission screw 13 to rotate.

[0061] As a preferred embodiment of the present invention, the bottom of the rectifier sill device is provided with two sets of height lifting mechanisms at both ends along the water flow direction. Each set of height lifting mechanisms includes two fixed screws, which are respectively arranged on the left and right sides of the rectifier sill device. The upper part of each fixed screw is connected to a transmission screw, namely a first transmission screw and a second transmission screw. The first transmission screw meshes with the driving gear through a first driven gear, and the second transmission screw rotates synchronously with the first driven gear through a second driven gear and a gear transmission belt.

[0062] The water level information acquisition module 2, the control module 3, and the first motor 14 communicate sequentially via matching interface modules using the RS-485 serial bus standard.

[0063] In this invention, during use, the conical fixing rod 8 at the lower part of the rectifier sill device 15 is first inserted into the riverbed and fixed. The longitudinal distance S5 between two adjacent rectifier sill devices is 4 to 5 times the width S1 of the rectifier sill device box, and the lateral distance S6 between two adjacent rectifier sill devices is 3 to 4 times the length S2 of the rectifier sill device box. The turning section of the bend is divided into a rectification and energy dissipation zone and a near-convex bank flow zone. The rectifier sill device 15 is arranged in the rectification and energy dissipation zone near the concave bank. The width of the rectification and energy dissipation zone is 1 / 3 to 1 / 2 of the width of the riverbed. Two sets of rectifier sill devices are arranged at equal intervals in the rectification and energy dissipation zone. The angle β between the central axis of the rectifier sill device and the axis of the bend is 0° to 20°. The rectifier sill devices are arranged from the connection between the straight section at the riverbed inlet and the bend to the connection between the bend and the straight section at the riverbed outlet.

[0064] The lower floating plate 24 has a plant cultivation box 4 on top, which can keep the plant cultivation box 4 at a water level near the water surface. When it is necessary to adjust the height of the plant cultivation box 4, information can be sent to the control module 3 to control the second motor 22 to rotate the long rod 23, pull the wound rope 27, and control the plant cultivation box 4 to descend to the appropriate position. When the water level changes from H1 to H2, the water level information acquisition module 2 will send the water depth information H at the center of the rectifier inclined plate structure. m1 The water depth is received by the control module 3, which calculates and processes the water depth. The output terminal then outputs the water depth information H, indicating the location of the center of the adjusted rectifier structure. m2 The first motor drives the shaft to rotate, causing the rectifier sill device 15 to adjust its height longitudinally, thus changing the center position of the sill device's housing structure from H... m1 Move to H m2 .

[0065] The expression for the distance Δh that the center of the rectifier sill device moves by when the water level changes from H1 to H2 is:

[0066] Δh=Hm1 -H m2

[0067] In the formula: H m1 H represents the center position of the rectifier sill device's box structure before the water level change. m2 The center position of the rectifier sill device's box structure after the water level changes is indicated by Δh. A positive Δh indicates that the rectifier sill device moves downwards longitudinally, while a negative Δh indicates that the rectifier sill device moves upwards longitudinally.

[0068] The distance H from the center of the rectifier sill device's box structure to the bottom of the riverbed m The empirical expression for the longitudinal velocity through the concave bank region of a bend:

[0069]

[0070] here

[0071]

[0072] H m =0.55(sinα) -0.80 H

[0073] In the formula: H is the riverbed depth, R c Where is the radius of the bend's centerline, and D is the width of the water flow. R is the average water depth of the cross section. e Reynolds number of water flow α is the inclination angle of the concave bank.

[0074] like Figure 7 The figure shows the distribution pattern of the longitudinal velocity profile on the concave bank of a bend. It can be observed that in actual bend flow, the longitudinal velocity is within the range of H... m The maximum value is at point 1, which is also the water level height at the center of the box structure of the rectifier sill device.

[0075] The expression for the angle β between the axis of the rectifier ramp and the axis of the curve:

[0076]

[0077] In the formula: D is the width of the water flow, v is the average flow velocity of the cross section, and R c Let be the radius of the curve's centerline, and g be the gravitational constant.

[0078] In a preferred embodiment of the device of the present invention, the control module is a PLC controller; the water level information acquisition module, the PLC controller and the first motor communicate sequentially using the RS-485 serial bus standard through matching interface modules.

[0079] As a preferred embodiment of the device of the present invention, multiple rectifier sill devices are provided at the bottom of the bend, dividing the turning section of the bend into a rectification and energy dissipation zone and a near-convex bank flow zone, with multiple sets of rectifier sill devices arranged in the rectification and energy dissipation zone near the concave bank.

[0080] The distance H between the center of the box structure of the inclined sill device and the bottom of the riverbed m

[0081] H m =0.55(sinα) -0.80 H

[0082] In the formula: α is the inclination angle of the concave bank, and H is the water depth of the riverbed.

[0083] Preferably, the center of the rectifier sill device's housing structure is located at 0.8H;

[0084] Preferably, the height of the rectifier sill device housing is S0 = (1 / 10 to 1 / 5)H;

[0085] Preferably, the width of the rectifier sill device housing is S1 = (1~1.5)S0;

[0086] Preferably, the length of the rectifier sill device housing is S2 = (2~3)S1;

[0087] Preferably, the longitudinal plane segment S3 of the rectifier sill device housing is (1 / 3 to 1 / 2)S4;

[0088] Preferably, the width of the rectifier energy dissipation region, D1, is (1 / 3 to 1 / 2)D;

[0089] Preferably, two sets of rectifier ramp devices are arranged in the rectifier energy dissipation zone, with the central axis of the rectifier ramp device forming an angle of 0° to 20° with the axis of the bend;

[0090] Preferably, the rectifier ramp is arranged from the connection between the straight section and the bend at the riverbed inlet to the connection between the bend and the straight section at the riverbed outlet.

[0091] Preferably, the longitudinal spacing between two adjacent rectifier ramps is S5 = (4~5)S1;

[0092] Preferably, the lateral spacing between two adjacent rectifier ramps is S6 = (3~4)S2;

[0093] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adaptive flow-rectifying sill device for use in urban meandering waterways, comprising: A rectifier sill device is installed in the rectifier energy dissipation zone at the bend of a curved river channel. The feature is that it further includes a height adjustment mechanism for automatically adjusting the water level of the rectifier sill device in the water according to the different water levels in the meandering river channel, so that the rectifier sill device operates at the optimal water level. The height adjustment mechanism includes: The water level information acquisition module is used to collect water level and water depth information near the rectifier sill device; A height lifting mechanism is installed between the rectifier ramp and the bottom of the riverbed; The control module has its signal input terminal connected to the water level information acquisition module and its signal output terminal connected to the height lifting mechanism. Also includes: The plant cultivation box floats on the water surface via a bottom floating plate; A limiting mechanism, connected between the plant cultivation box and the rectifier sill device, is used to limit the plant cultivation box directly above the rectifier sill device, comprising: The support frame is fixedly connected to the bottom of the rectifier sill device, and the support frame is provided with a vertically arranged limiting groove; A limiting slide buckle is fixedly connected to the plant cultivation box, and the limiting slide buckle is slidably connected in the limiting slide groove; Also includes: The second motor is fixedly connected to the rectifier sill device, and the drive shaft of the second motor is arranged horizontally and coaxially connected to a long rod. A rope is wound around the long rod at one end and connected to a thin rod between the limiting slip and the rectifier sill device at the other end. The drive shaft of the second motor drives the long rod to rotate, thereby fine-tuning the floating height of the plant cultivation box.

2. The self adaptive rectification apron device for urban curved river channel according to claim 1, characterized in that, The height lifting mechanism includes: The fixed screw is arranged vertically, and its bottom end is fixedly connected to the bottom of the riverbed; The transmission screw is helically sleeved on the upper outer side of the fixed screw and connected to the rectifier sill device through a bearing. A driven gear is coaxially fixedly connected to the outside of the transmission screw, and the driven gear is connected to the rectifier sill device through a limiting mechanism. The driving gear meshes with the driven gear. The driving gear is mounted on the drive shaft of the first motor, and the first motor is fixedly mounted on the rectifier sill device. The first motor drives the shaft to rotate, which in turn drives the driven gear to rotate via the driving gear. The rotation of the driven gear in turn drives the transmission screw to rotate relative to the fixed screw and move vertically along the axis of the fixed screw, thereby driving the entire rectifier sill device to move up and down.

3. The self adaptive rectification apron device for urban curved river channel according to claim 2, characterized in that, The bottom of the rectifier sill device is equipped with two sets of height lifting mechanisms at both ends along the water flow direction. Each set of height lifting mechanisms includes two fixed screws, which are respectively arranged on the left and right sides of the rectifier sill device. The upper part of each fixed screw is connected to a transmission screw, namely the first transmission screw and the second transmission screw. The first transmission screw meshes with the driving gear through a first driven gear, and the second transmission screw rotates synchronously with the first driven gear through a second driven gear and a gear transmission belt.

4. The self adaptive rectification silt barrier device for urban curved river channel as claimed in claim 2 wherein, The bottom end of the fixing screw is provided with a tapered fixing rod that is inserted into the bottom of the riverbed.

5. The self adaptive rectification silt barrier device for urban curved river course as claimed in claim 2 wherein, The rectifier sill device is a box with a trapezoidal longitudinal section.

6. The self adaptive rectification silt barrier device for urban curved river channel as claimed in claim 2 wherein, The first motor is a stepper motor.

7. The method for operating the self-adaptive rectification sill device applied to the urban curved river channel according to any one of claims 2-6, characterized in that, Includes the following steps: S1. The rectifier ramp device is arranged from the connection between the straight section and the bend at the riverbed inlet to the connection between the bend and the straight section at the riverbed outlet. The distance from the center of the box structure of the inclined sill device to the riverbed bottom , ， In the formula: is the concave bank angle, and H is the water depth of the river bed. S2. When the riverbed water depth near the rectifier sill device changes from H1 to H2, the water level information acquisition module will record the center position of the rectifier sill device's box structure before the water level change. The input is received by the control module, which calculates and processes the water depth. The output then shows the center position of the rectifier sill device's box structure after the water level change. The first motor drive shaft is controlled to rotate, causing the rectifier sill device's housing structure to adjust its height longitudinally, changing the center position of the rectifier sill device's housing structure from... Move to This is to ensure that the rectifier sill device operates at the optimal water level.

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