Small and medium-sized river low-flow hydrological flow measuring groove structure

Abstract

The utility model provides a low-flow hydrological flow measuring groove structure for small and medium-sized rivers. The foundation is attached to the two sides of a riverbed, the isolation beam is arranged in the river flow direction, a measuring groove is formed in one side of the isolation beam, a water collecting pool is formed in the other side of the isolation beam, an upstream water retaining beam and a downstream water retaining beam are arranged at the longitudinal ends of the water collecting pool respectively, and an auxiliary unit used for cleaning sediment at the bottom is arranged at the bottom of the water collecting pool. The water collecting tank is arranged as an energy dissipation building, so that the material consumption is reduced, and the construction difficulty is reduced; the auxiliary unit is arranged in the water collecting tank, silt in the water collecting tank is scoured out of the water collecting tank in cooperation with the flow speed of water flow, and the risk that the silt hardens in the water collecting tank is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of river ecological monitoring, and in particular to a low-flow hydrological flume structure for small and medium-sized rivers. Background Technology

[0002] Small and medium-sized rivers refer to rivers with a drainage area between 200 and 3,000 square kilometers. These rivers are typically characterized by rapid confluence and sudden rises and falls in water levels, especially small rivers and streams located in mountainous areas, which are short, fast-flowing, and prone to sudden outbreaks and disasters. In China, there are more than 50,000 rivers with a drainage area of ​​less than 1 million square kilometers. They are an important part of China's flood control and disaster reduction system, but they are often also the weakest link.

[0003] To meet the needs of river ecological protection, ecological flow monitoring is required for these small and medium-sized rivers. A conventional method for ecological flow monitoring is to install flow measurement weirs and flumes on the riverbed, raising or narrowing the riverbed to increase the water level at the flow cross-section, thus achieving low-flow measurement. However, these weirs and flumes have some drawbacks. For example, they are prone to siltation and are relatively expensive. Therefore, we propose a low-flow hydrological flow measurement flume structure for small and medium-sized rivers to address these issues. Utility Model Content

[0004] In view of this, the present invention aims to propose a hydrological flume structure for small and medium-sized rivers with low flow rates. By setting up a collection pool as an energy dissipation structure, the amount of materials used is reduced and the construction difficulty is lowered. Furthermore, by setting up auxiliary units in the collection pool, the silt in the collection pool is flushed out of the collection pool in coordination with the flow velocity of the water, thereby reducing the risk of silt hardening in the collection pool.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A low-flow hydrological flume structure for small and medium-sized rivers includes a foundation fitted to both sides of the riverbed and an isolation beam set along the direction of river flow.

[0007] On the foundation, a measuring groove is provided on one side of the isolation beam, and a water collection pool is provided on the other side of the isolation beam. An upstream water-retaining beam and a downstream water-retaining beam are respectively provided at the longitudinal ends of the water collection pool.

[0008] The bottom of the water collection tank is equipped with an auxiliary unit for cleaning the bottom sediment.

[0009] Furthermore, the auxiliary unit includes an installation tube and a water-dispelling plate. The installation tube is inclined in the opposite direction to the water flow direction, and the water-dispelling plate is inclined in the forward direction to the water flow direction. One end of the water-dispelling plate is connected to the front side of the installation tube, and the other end is connected to the installation tube through a spring. The other end of the spring extends into the installation tube and is connected to the bottom of the installation tube.

[0010] Furthermore, the water-repellent plate has multiple blind water collection holes on its side facing away from the mounting tube.

[0011] Furthermore, the number of auxiliary units is multiple.

[0012] Furthermore, the inner walls of the longitudinal ends of the water collection pool are all provided with slopes, and the slopes are all inclined towards the middle of the water collection pool.

[0013] Furthermore, the water collection pool is formed by the upstream water-retaining beam, the downstream water-retaining beam, the isolation beam, and the first side water-guiding beam, and the measuring trough is formed by the isolation beam and the second side water-guiding beam.

[0014] Furthermore, the end of the upstream water-retaining beam near the measuring trough is arc-shaped.

[0015] Furthermore, both the first and second side water guide beams are provided with corner guards at their ends, and each corner guard is provided with a toothed groove.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] This utility model relates to a low-flow hydrological measuring channel structure for small and medium-sized rivers. By setting up a measuring channel and a collection pool at the riverbed, during the dry season, the upstream water-retaining beam on the collection pool blocks water from flowing through the collection pool, forcing the water to flow through the measuring channel. This narrows the riverbed, raises the water surface, and facilitates ecological flow monitoring of the river. Furthermore, by setting up an auxiliary unit in the collection pool, the scouring capacity of the water flow, combined with changes in water velocity, discharges sediment from the collection pool, preventing sediment from accumulating and hardening in the collection pool over a long period of time. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model. The directional terms such as front / back, up / down, etc., used therein are only used to indicate relative positional relationships and do not constitute an improper limitation of this utility model. In the drawings:

[0019] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0020] Figure 2 This is a structural schematic diagram from a second perspective of the present invention;

[0021] Figure 3 This is a schematic diagram of the auxiliary unit of this utility model;

[0022] Figure 4This is a cross-sectional view of the present invention;

[0023] Figure 5 This is a longitudinal sectional view of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Foundation; 2. Isolation beam; 3. Measuring groove; 4. Water collection pool; 5. Upstream water retaining beam; 6. Downstream water retaining beam; 7. Installation pipe; 8. Water deflector; 9. Spring; 10. Water collection blind hole; 11. Slope; 12. First side water guide beam; 13. Second side water guide beam; 14. Toothed groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "back" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model; if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] This embodiment relates to a low-flow hydrological flume structure for small to medium-sized rivers, one exemplary structure of which is as follows: Figure 1-5 As shown.

[0030] Overall, such as Figure 1-2 As shown, the low-flow hydrological flume structure for small to medium-sized rivers includes a foundation 1 fitted to both sides of the riverbed and an isolation beam 2 positioned along the river's flow direction. On the foundation 1, a measuring flume 3 is formed on one side of the isolation beam 2, and a collection pool 4 is formed on the other side. An upstream retaining beam 5 and a downstream retaining beam 6 are respectively installed at the longitudinal ends of the collection pool 4. An auxiliary unit for clearing sediment from the bottom of the collection pool 4 is provided. The heights of both the upstream and downstream retaining beams 5 and 6 are higher than the top of the measuring flume 3. During the dry season, the upstream retaining beam 5 blocks the water flow, allowing it to flow only through the measuring flume 3, thereby raising the water level and facilitating ecological flow monitoring of the river.

[0031] In this embodiment, the end of the upstream water-retaining beam 5 near the measuring channel 3 is set to an arc shape. When the water flow is blocked by the upstream water-retaining beam 5 and flows into the measuring channel 3, the arc-shaped end of the upstream water-retaining beam 5 can better guide the water flow into the measuring channel 3.

[0032] As an example structure of an auxiliary unit, such as Figure 1-3 As shown, it includes an installation pipe 7 and a water-deflecting plate 8. The installation pipe 7 is inclined in the opposite direction to the water flow, and the water-deflecting plate 8 is inclined in the forward direction of the water flow. One end of the water-deflecting plate 8 is connected to the front side of the installation pipe 7, and the other end is connected to the installation pipe 7 via a spring 9. The other end of the spring 9 extends into the installation pipe 7 and is connected to the bottom of the installation pipe 7. Since the water flow velocity varies, especially for small and medium-sized rivers where the velocity variation is greater, when the water flows past the water-deflecting plate 8, it impacts the water-deflecting plate 8 and presses it downwards, causing the spring 9 to contract within the installation pipe. When the water flow velocity changes, the force of the water impacting the water-deflecting plate 8 varies, meaning the downward displacement of the water-deflecting plate 8 varies. Therefore, when the water flow velocity changes, the end of the water-deflecting plate 8 connected to the spring 9 can move up and down. When the water-dispensing plate 8 moves up and down, it can stir the water at the bottom of the water collection pool 4, thereby applying vertical force to the mud and sand at the bottom of the water collection pool 4. Combined with the horizontal force of the water flow, it can better flush the mud and sand at the bottom of the water collection pool 4 out of the water collection pool 4.

[0033] The auxiliary units are preferably multiple. For example... Figure 3 As shown, multiple blind water collection holes 10 are provided on the side of the water-dispensing plate 8 facing away from the mounting pipe 7. Water can be stored in the blind water collection holes 10 of the water-dispensing plate 8. When the water-dispensing plate 8 moves up and down, it is easier to drive the surrounding water to move, thereby improving the stirring ability of the water around the water-dispensing plate 8 and better lifting the mud and sand at the bottom of the water collection pool 4.

[0034] And, as Figure 5 As shown, the inner wall of the longitudinal end of the water collection pool 4 is provided with a ramp 11, and the ramp 11 is inclined towards the middle of the water collection pool 4. This facilitates the flow of sediment out of the water collection pool 4 along the slope wall of the ramp 11.

[0035] In this embodiment, the water collection pool 4 is formed by an upstream water-retaining beam 5, a downstream water-retaining beam 6, an isolation beam 2, and a first side guide beam 12. The measuring channel 3 is formed by the isolation beam 2 and the second side guide beam 13 sandwiched together. Corner guards are provided at the ends of both the first side guide beam 12 and the second side guide beam 13, and each corner guard has a toothed groove 14. The corner guards protect the contact points between the first side guide beam 12 and the second side guide beam 13 and the riverbed, and the toothed grooves 14 on the corner guards provide better protection during water erosion, reducing damage to the foundation 1 caused by water flow.

[0036] The working process of this embodiment is as follows:

[0037] During the dry season, the upstream water-retaining beam 5 and the downstream water-retaining beam 6 can block the water flow into the collection pool 4, thereby narrowing the riverbed. When the water flows through the measuring channel 3, the water level is raised, which facilitates ecological flow monitoring.

[0038] When the river flow is high, the water will exceed the height of the upstream and downstream retaining beams 5 and 6, and the water will enter the collection pool 4. The collection pool 4 stores the water and can serve as an energy dissipation structure. As the water flows through the collection pool 4, the impact force of the water flow can carry the silt out of the collection pool 4, and with the help of the auxiliary unit, the silt at the bottom of the collection pool 4 can be stirred up, which can better remove the silt out of the collection pool 4.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low-flow hydrological flume structure for small to medium-sized rivers, characterized in that: It includes foundations (1) that fit the sides of the riverbed and isolation beams (2) that are set along the direction of the river flow; On the foundation (1), a measuring groove (3) is provided on one side of the isolation beam (2), and a water collection pool (4) is provided on the other side of the isolation beam (2). An upstream water-blocking beam (5) and a downstream water-blocking beam (6) are respectively provided at the longitudinal ends of the water collection pool (4). The bottom of the water collection tank (4) is equipped with an auxiliary unit for cleaning the bottom mud and sand.

2. The low-flow hydrological flume structure for small and medium-sized rivers according to claim 1, characterized in that: The auxiliary unit includes an installation tube (7) and a water-dispelling plate (8). The installation tube (7) is inclined in the opposite direction to the water flow direction, and the water-dispelling plate (8) is inclined in the forward direction of the water flow direction. One end of the water-dispelling plate (8) is connected to the front side of the installation tube (7), and the other end is connected to the installation tube (7) through a spring (9). The other end of the spring (9) extends into the installation tube (7) and is connected to the bottom of the installation tube (7).

3. The low-flow hydrological flume structure for small and medium-sized rivers according to claim 2, characterized in that: The water-repellent plate (8) has multiple water-collecting blind holes (10) on its side facing away from the mounting pipe (7).

4. The low-flow hydrological flume structure for small and medium-sized rivers according to claim 2 or 3, characterized in that: The number of auxiliary units is multiple.

5. The low-flow hydrological flume structure for small and medium-sized rivers according to claim 1, characterized in that: The inner wall of the longitudinal end of the water collection pool (4) is provided with a slope (11), and the slope (11) is inclined towards the middle of the water collection pool (4).

6. The low-flow hydrological flume structure for small and medium-sized rivers according to claim 5, characterized in that: The water collection pool (4) is formed by the upstream water-blocking beam (5), the downstream water-blocking beam (6), the isolation beam (2) and the first side water guide beam (12), and the measuring trough (3) is formed by the isolation beam (2) and the second side water guide beam (13).

7. The low-flow hydrological flume structure for small and medium-sized rivers according to claim 6, characterized in that: The end of the upstream water-blocking beam (5) near the measuring groove (3) is arc-shaped.

8. The low-flow hydrological flume structure for small and medium-sized rivers according to claim 6 or 7, characterized in that: The ends of the first side water guide beam (12) and the second side water guide beam (13) are provided with corner guards, and the corner guards are provided with tooth grooves (14).

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