Flow guide device at lake water inlet

Abstract

The invention discloses a flow guide device at a lake water inlet, and belongs to the field of lake ecological management. The guide wall can horizontally rotate around the shore, the length of the guide wall is larger than the distance between two channels, a baffle is arranged between the two channels and can vertically rotate with the middle as the axis, and the guide wall is connected with the baffle through a steel cable. The two baffles are located on the inner sides of the two channels respectively. The number of the steel cables is two, and the steel cables are connected with the two baffles respectively. And a spring is arranged between the steel cable and the baffle. The part of the steel cable at the bottom of the channel is wrapped by a steel pipe. The flow guide wall is of a hollow structure. The flow guide device at the lake water inlet provided by the invention can achieve the effects of having a self-adaptive adjustment function and effectively preventing bottom mud scouring.

Description

Technical Field

[0001] The invention relates to lake ecological management, in particular to a diversion device at a lake water inlet. Background Art

[0002] In water conservancy projects, lake inlets are critical areas, where water flow directly impacts the lake's water quality and ecological environment. Due to climate change and the impact of human activities, lake inlets often face problems with excessive flow or velocity, which can cause the lake's bottom sediment to be washed away, affecting water quality and the aquatic ecological balance. The primary solution to this problem is to install a fixed, rigid diversion wall at the lake's water inlet. This diversion wall's primary function is to prevent the scouring of lakeshore sediment, thereby preventing pollutants in the sediment from buoying, thereby maintaining water quality and preventing damage to the lake's ecosystem.

[0003] Traditional diversion walls mostly use fixed rigid structures (such as concrete, masonry retaining walls, etc.), which have the following limitations: (1) Traditional diversion walls lack dynamic adjustment capabilities and cannot adapt to energy fluctuations. Under low flow conditions in the dry season, siltation is easy to form in front of the diversion wall, thereby reducing the water flow capacity; under high flow conditions in the flood season, the flow rate cannot be reduced by changing the shape due to the fixed structure; (2) The rigid structure easily causes the water flow to concentrate at the end or corner of the wall, and cannot disperse the water flow energy, forming a high-speed jet area. Moreover, after the water flow bypasses the diversion wall, it is easy to cause turbulence due to sudden diffusion, destroying the natural form of the water flow and causing the local scouring of the bank slope to intensify; (3) Traditional diversion walls will have a negative impact on the ecology. Continuous diversion walls will completely cut off the water flow, and rigid diversion walls will hinder the vertical mixing of the water body, resulting in a decrease in dissolved oxygen in the area behind the wall and the formation of a dead water area. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a diversion device at the water inlet of a lake with an adaptive adjustment function and effective prevention of bottom sediment scouring.

[0005] Technical solution: The diversion device at the lake inlet described in the present invention includes a diversion wall that can rotate horizontally around the shore and has a length greater than the distance between the two channels. A baffle is provided between the two channels, and the baffle can be vertically rotated with the middle part as the axis. The diversion wall and the baffle are connected by a steel cable.

[0006] Preferably, there are two baffles, one located inside the two channels.

[0007] Preferably, there are two steel cables, which are respectively connected to the two baffles.

[0008] Preferably, a spring is provided between the steel cable and the baffle.

[0009] Preferably, the portion of the steel cable at the bottom of the channel is wrapped by a steel pipe.

[0010] Preferably, the guide wall is a hollow structure.

[0011] Preferably, a limit block is provided at the bottom of the channel for limiting the maximum opening angle of the guide wall to an acute angle.

[0012] Preferably, a plurality of holes are provided on the guide wall.

[0013] Preferably, the hole is a rectangle with its long side in the horizontal direction.

[0014] Preferably, the holes are in one or more of the following shapes: circular, triangular, square, irregular, or rectangular with the long side in the vertical direction.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) The guide wall in the device can rotate around the shore, and change the angle between the guide wall and the water flow direction according to the flow rate or flow velocity of the water flow, and has dynamic adjustment ability, realizing adaptive adjustment and adapting to energy fluctuations; (2) The guide wall is a hollow structure, which can effectively disperse the water flow energy, avoid the formation of high-speed jet areas, and avoid the disturbance of the nearshore water body by the high-speed water flow entering the lake, which is beneficial to protecting the natural form of the water flow and preventing the scouring of the bottom sediment; (3) The device has a dynamic adjustment function, which effectively avoids the defect of the traditional rigid guide wall that hinders the vertical mixing of the water body, thereby protecting the ecological environment of the lake. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0017] Figure 2 This is a schematic diagram of the working state of the diversion device;

[0018] Figure 3 for Figure 1 A partial enlarged view of the middle part;

[0019] Figure 4 It is the side view of the baffle in the initial state;

[0020] Figure 5 This is the side view of the baffle in working state;

[0021] Figure 6 This is a schematic diagram of the guide wall in Example 1;

[0022] Figure 7 This is a schematic diagram of the guide wall in Example 2;

[0023] Figure 8 This is a schematic diagram of the guide wall in Example 3;

[0024] Figure 9 This is a schematic diagram of the guide wall in Example 4;

[0025] Figure 10 This is a schematic diagram of the guide wall in Example 5;

[0026] Figure 11 Schematic diagram of the guide wall in Example 6. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be further described below in conjunction with embodiments.

[0028] Example 1

[0029] like Figure 1-6 As shown, the diversion device at the lake inlet described in the present invention includes a diversion wall 1 that can rotate horizontally around the shore and has a length greater than the distance between the two channels. A baffle 2 is provided between the two channels. The baffle 2 can be vertically rotated with the middle part as the axis. The diversion wall 1 and the baffle 2 are connected by a steel cable 3.

[0030] There are two baffles 2, which are located on the inner sides of the two channels respectively.

[0031] Two steel cables 3 are provided, which are respectively connected to the two baffles 2 , so as to enhance the traction force on the guide wall 1 .

[0032] A spring 4 is provided between the steel cable 3 and the baffle 2. When the water flow velocity or flow rate is lower than the threshold, the inclination angle of the baffle 2 becomes smaller, the spring is no longer stretched or even compressed, and the guide wall is pulled by pulling the steel cable, so that the angle between it and the shore becomes smaller.

[0033] The portion of the steel cable 3 at the bottom of the channel passes through the steel pipe 5 to reduce the impact of the movement of the steel cable on the state of the lake.

[0034] like Figure 6 As described above, the guide wall 1 is a hollow structure, which can effectively disperse the water energy, avoid the formation of high-speed jet areas, and prevent the high-speed water entering the lake from disturbing the nearshore water body, which is beneficial to protecting the natural form of the water flow and preventing bottom sediment scouring.

[0035] A limit block 6 is provided at the bottom of the channel for limiting the maximum opening angle of the guide wall 1 to an acute angle.

[0036] A plurality of holes 11 are formed on the guide wall 1 .

[0037] The hole 11 is a rectangle with its long side in the horizontal direction. The limit block 6 is in a "7" shape. When the limit block 6 contacts the guide wall 1, the upper half of the limit block 6 can be inserted into the hole 11.

[0038] The operation process of the diversion device at the lake water inlet of the present invention is as follows:

[0039] The initial state diagram is as follows Figure 1As shown in the figure, the diversion wall is in contact with the limit block, and the upper part of the limit block is inserted into the hole at the corresponding position of the diversion wall. When the water flow rate or flow velocity exceeds the threshold, the upper part of the baffle in the channel is subjected to the impact of the water flow, and the lower part of the structure forms a torque balance system through reverse traction. With the help of steel cables, the diversion wall produces adaptive deflection, reducing the angle between the diversion wall and the bank, as shown in the figure. Figure 2 As shown. Since the diversion wall is a hollow structure, it can effectively disperse the energy of water flow, improve the scouring effect of water flow, change the direction of water flow, prevent sediment scouring, reduce the disturbance of high-speed water flow entering the lake on the nearshore water body, reduce the release of sediment during the flood season, and reduce the impact on the lake ecosystem. When the water flow rate or flow rate is lower than the threshold, the inclination angle of the upper part of the baffle in the channel becomes smaller, the spring is no longer stretched, and the traction force of the steel cable is reduced. Then, under the action of water flow, the angle between the diversion wall and the shore becomes larger, and the diversion wall returns to Figure 1 The initial state is shown.

[0040] Example 2

[0041] The similarities between this embodiment and embodiment 1 are not repeated here, and the differences are as follows:

[0042] The holes 11 in the guide wall 1 are rectangular with the long sides in the vertical direction. Figure 7 shown.

[0043] Example 3

[0044] The similarities between this embodiment and embodiment 1 are not repeated here, and the differences are as follows:

[0045] The holes 11 in the guide wall 1 are triangular, as shown in FIG. Figure 8 shown.

[0046] Example 4

[0047] The similarities between this embodiment and embodiment 1 are not repeated here, and the differences are as follows:

[0048] The holes 11 in the guide wall 1 are circular. Figure 9 shown.

[0049] Example 5

[0050] The similarities between this embodiment and embodiment 1 are not repeated here, and the differences are as follows:

[0051] The holes 11 in the guide wall 1 are square and rectangular. Figure 10 shown.

[0052] Example 6

[0053] The similarities between this embodiment and embodiment 1 are not repeated here, and the differences are as follows:

[0054] The holes 11 in the guide wall 1 are of special shapes such as circular, triangular, or square. Figure 11 shown.

Claims

1. A diversion device at a lake inlet, characterized in that: The invention comprises a guide wall (1) which can be rotated horizontally around a bank and has a length greater than the distance between two channels. A baffle (2) is provided between the two channels. The baffle (2) can be rotated vertically with its center as an axis. The guide wall (1) and the baffle (2) are connected by a steel cable (3).

2. The lake inlet diversion device according to claim 1, characterized in that: There are two baffles (2), which are respectively located on the inner sides of the two channels.

3. The lake inlet diversion device according to claim 2, characterized in that: The steel cables (3) are provided with two and are respectively connected to the two baffles (2).

4. The lake inlet diversion device according to claim 1, characterized in that: A spring (4) is provided between the steel cable (3) and the baffle (2).

5. The lake inlet diversion device according to claim 1, characterized in that: The portion of the steel cable (3) at the bottom of the channel is wrapped by a steel pipe (5).

6. The lake inlet diversion device according to claim 1, characterized in that: The guide wall (1) is a hollow structure.

7. The lake inlet diversion device according to claim 1, characterized in that: The bottom of the channel is provided with a limit block (6) for limiting the maximum opening angle of the guide wall (1) to an acute angle.

8. The lake inlet diversion device according to claim 1, characterized in that: The guide wall (1) is provided with a plurality of holes (11).

9. The lake inlet diversion device according to claim 8, characterized in that: The hole (11) is a rectangle with its long side in the horizontal direction.

10. The lake inlet diversion device according to claim 8, characterized in that: The holes (11) are in one or more of the following shapes: circular, triangular, square, irregular, or rectangular with the long side in the vertical direction.

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