Low head barrage multi-frequency ecological expansion and contraction gate

Abstract

The present application relates to the technical field of hydraulic engineering, and specifically relates to a low-head river weir multi-frequency ecological expansion gate, which comprises left-right symmetrical concrete masonry, and further comprises a multi-frequency expansion gate, a transmission mechanism and a gate fine adjustment mechanism, the multi-frequency expansion gate comprises a plurality of gates which are horizontally slidably sleeved in the concrete masonry, the surface of each gate is uniformly provided with a water outlet hole, and the aperture and quantity of the water outlet holes on the surface of each gate are different from each other, the present application has the beneficial effects that: by setting the multi-frequency expansion gate and the transmission mechanism, and by setting the multi-frequency expansion gate which is composed of a plurality of gates with different numbers and apertures of water outlet holes, different gates can be selected according to the water level of river water in flood season or non-flood season, so that the water discharge capacity of the gate can be changed according to the water level in different seasons and different periods, flexible adjustment of ecological flow discharge is realized, and the ecological flow discharge capacity can meet the discharge requirements in any period.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, specifically to a multi-frequency ecological expansion and contraction gate for low-head river dams. Background Technology

[0002] As the nation increasingly emphasizes ecological civilization construction, ecological water conservancy projects that prioritize ecological protection and enable harmonious development between humans and water are receiving more and more attention. To maintain river health, create beautiful water landscapes, and build happy rivers and lakes, the state requires rivers to maintain ecological flow. Ecological flow is the minimum requirement for ensuring water use for the downstream ecological environment and a crucial measure for protecting the downstream ecological environment. To guarantee the downstream ecological environment and maintain the ecological flow of downstream rivers, while storing water upstream, a portion of the water must be diverted downstream to meet the downstream ecological flow release requirements. To maintain ecological flow, many rivers, especially those in northern regions, require the construction of rubber dams or weirs to store water. To maintain the downstream ecological environment and the ecological balance for downstream organisms, the downstream ecological flow release requirements must be met at all times during construction.

[0003] Existing technologies using rubber dams or weirs can meet the water retention requirements, but their construction methods are relatively simple and mostly fixed, making them unadjustable and resulting in unregulated ecological flow. Furthermore, due to varying river levels at different times and under different climates, existing rubber dams or weirs cause excessive water release during flood seasons or rainy seasons, leading to water wastage. During dry seasons, insufficient release can cause downstream riverbed dehydration and reduce water levels, affecting the integrity of the river habitat. Therefore, there is an urgent need to design a gate structure that can flexibly adjust ecological flow release to ensure that ecological landscape water needs are met at any time while also satisfying downstream ecological flow release requirements. Summary of the Invention

[0004] To address the aforementioned deficiencies and problems, this invention provides a multi-frequency ecological expansion gate for low-head river dams. Through the cooperation of the multi-frequency expansion gate and the transmission mechanism, gates with different flow rates can be selected according to the water level at different times, achieving multi-level gate regulation and ensuring that the gates can always meet the requirements for ecological flow discharge.

[0005] The solution adopted by this invention to solve its technical problem is: a low-head dam multi-frequency ecological expansion gate, comprising symmetrically arranged concrete masonry, a multi-frequency expansion gate, a transmission mechanism, and a gate fine-tuning mechanism. The multi-frequency expansion gate includes multiple gates laterally slidably fitted within the concrete masonry. The surface of each gate is evenly distributed with drainage holes, and the diameter and number of drainage holes on each gate surface are different. The side of the concrete masonry has gate slots that match the gates, allowing the gates to be moved out of the gate slots. The transmission mechanism includes a screw laterally arranged within the concrete masonry, with a rotating component at the end of the screw to control its rotation. A threaded sleeve is threaded onto the screw, and a horizontal plate is connected to the side of the threaded sleeve. The upper part has multiple sets of positioning holes corresponding to the positions of each gate. Positioning components are movably fitted inside the positioning holes, and each gate has a matching insertion hole. The positioning component is inserted into the corresponding gate's insertion hole, so that the horizontal plate is connected to the corresponding gate through the positioning component. When the screw rotates, it drives the screw sleeve and the horizontal plate to move, which can drive the corresponding gate to move and extend. An adjustment slot is provided on the upper outer part of the concrete masonry, and a cover plate is matched in the adjustment slot. The insertion position of the positioning component can be adjusted through the adjustment slot, and the positioning component can be connected to different gates.

[0006] Furthermore, the gate includes a main gate that is slidably fitted into the concrete masonry. An adjustment chamber is laterally opened inside the main gate, and a movable gate is vertically slidably fitted inside the adjustment chamber. The movable gate is connected to the adjustment chamber by a vertically telescopic spring airbag.

[0007] Furthermore, the gate fine-tuning mechanism includes multiple spring airbags II arranged vertically on the side of the concrete masonry. The spring airbags II can extend and retract laterally under force. A merging pipe is provided on the side of the spring airbags II. Each spring airbag II is connected to the merging pipe through an air guide pipe. The merging pipe is connected to the spring airbag I in each gate through multiple diverting pipes, and a valve is provided on each diverting pipe.

[0008] Furthermore, the rotating component includes a bevel gear one fixedly mounted on the end of the screw, a rotating shaft vertically mounted on the concrete masonry, a bevel gear two meshing with the bevel gear one fixedly mounted on the lower end of the rotating shaft, and a rotating block fixedly mounted on the upper end of the rotating shaft.

[0009] Furthermore, there are two screws, which are symmetrically arranged on the inner top of the concrete masonry, and the ends of the two screws are connected by a sprocket assembly. By setting two screws, it is ensured that the horizontal plate is balanced on both sides when it drives the gate to move.

[0010] Furthermore, the inner bottom of the concrete masonry is provided with a horizontal groove corresponding to the position of the multi-frequency telescopic gate, and a slider matching the groove is provided below the gate. The multi-frequency telescopic gate is slidably fitted into the groove by the slider.

[0011] Furthermore, a sealing gasket is provided at the output end of the gate slot to ensure the airtightness of the concrete masonry.

[0012] The beneficial effects of this invention are as follows: By setting up a multi-frequency telescopic gate and a transmission mechanism, and arranging different numbers and diameters of discharge holes on each gate of the multi-frequency telescopic gate, the gate with the corresponding discharge capacity at a certain frequency can be activated according to the changes in ecological water demand caused by seasonal changes. This allows the discharge capacity of the gate to be changed according to the water level at different times and seasons, realizing flexible adjustment of ecological flow release and ensuring that the ecological flow release can meet the release requirements at any time. Moreover, water flows out from both the surface and bottom of the gate, which can meet the needs of different organisms crossing the dam and weir. When it is necessary to use a gate with a certain discharge capacity for ecological flow regulation, the screw can be rotated by the rotating component. With the cooperation of the screw and the screw sleeve, the corresponding gate is moved outward by the cooperation of the horizontal plate and the positioning component to intercept and release the upstream water flow. The gate replacement method is simple, convenient and easy to operate. By setting up a gate fine-tuning mechanism, the pressure of the water flow on the spring airbag changes with the rise and fall of the river water level due to weather conditions. As a result, the extension of the movable gate also changes with the water level. This allows for precise adjustment of the gate height and the number of discharge holes based on the water level changes at the same time, enabling multi-level gate regulation. This achieves precise control of ecological water storage and ecological flow discharge, ensuring that the gate has water storage function at all times while also meeting the requirements for ecological flow discharge. Attached Figure Description

[0013] Figure 1 This is a schematic diagram illustrating the usage state of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the concrete masonry of the present invention; Figure 4 This is a schematic diagram of the transmission mechanism structure of the present invention; Figure 5 This is one of the structural schematic diagrams of the present invention; Figure 6 This is the second schematic diagram of the gate fine-tuning mechanism of the present invention; Figure 7 This is a three-dimensional cross-sectional view of the gate structure of the present invention.

[0014] In the diagram: 1. Concrete masonry; 2. Gate slot; 3. Multi-frequency telescopic gate; 3a. Gate 1; 3b. Gate 2; 3c. Gate 3; 31. Main gate; 32. Adjusting chamber; 33. Movable gate; 34. Spring airbag 1; 35. Insertion hole; 4. Transmission mechanism; 41. Screw; 42. Sprocket assembly; 43. Screw sleeve; 44. Horizontal plate; 45. Positioning hole; 46. Positioning component; 47. Bevel gear 1; 48. Rotating shaft; 49. Bevel gear 2; 410. Rotating block; 5. Gate fine-tuning mechanism; 51. Spring airbag 2; 52. Air guide pipe; 53. Combination pipe; 54. Diversion pipe; 55. Valve; 6. Sliding block; 7. Slide groove; 8. Weir; 9. Adjusting slot; 10. Cover plate. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Please see Figure 1-7 This invention provides a technical solution for a multi-frequency ecological expansion and contraction gate for low-head river dams: Example

[0017] according to Figure 1 and Figure 2 As shown, the structure includes symmetrically arranged concrete masonry 1. The outer ends of the concrete masonry 1 are connected to a weir 8 or a rubber dam. A multi-frequency expansion gate 3 is installed inside the concrete masonry 1. Within the concrete masonry 1, gates 1-3a, 2-3b, 3-3c, and 3-n (n≥2, n=3 is used as an example here) are arranged sequentially. Gates 1-3a, 2-3b, and 3-3c have drainage holes of varying diameters and numbers. The diameter and number of drainage holes are designed and installed according to the specific flow requirements of different levels. Figure 4As shown, the inner bottom of the concrete masonry 1 has three horizontally opened grooves 7 corresponding to the positions of gate 1 3a, gate 2 3b, and gate 3c. Below the gates are sliding blocks 6 that match the grooves 7. Gates 1 3a, 2 3b, and 3c are slidably fitted into their respective grooves 7 via the corresponding sliding blocks 6. On the inner side of the concrete masonry 1, gate slots 2 that match gates 1 3a, 2 3b, and 3c are opened. Gates 1 3a, 2 3b, and 3c can be pushed out of the gate slots 2 via a transmission mechanism 4 to connect with the symmetrical gates. The output end of the gate slots 2... A sealing gasket is provided to prevent water from flowing into the concrete masonry 1 through the gap in the gate slot 2, ensuring the airtightness of the concrete masonry 1. The transmission mechanism 4 includes two screws 41 arranged laterally symmetrically above the interior of the concrete masonry 1. The ends of the two screws 41 are connected by a sprocket assembly 42. The ends of the screws 41 are provided with rotating components to control the rotation of the screws 41. The rotating components include a bevel gear 47 fixedly fitted inside the end of the screw 41, and a rotating shaft 48 vertically fitted on the concrete masonry 1. The lower end of the rotating shaft 48 is fixedly fitted with a bevel gear 49 that meshes with the bevel gear 47. A rotating block 410 is fixedly fitted onto the upper end of component 8. Rotation of the rotating block 410 occurs manually or with a tool, causing it to rotate. The meshing of bevel gear 49 and bevel gear 47 drives the screw 41 to rotate. The rotating component can also be a motor installed inside the concrete masonry 1 and directly connected to the screw 41. Screw sleeves 43 are threaded onto the two screws 41, and a horizontal plate 44 connects between the two screw sleeves 43. By setting two screws 41, not only can the movement of the horizontal plate 44 be guided, but the forces on both ends of the horizontal plate 44 are also balanced when it moves left and right. Three sets of... Positioning holes 45 correspond to the positions of gate 1 3a, gate 2 3b, and gate 3 3c. Positioning components 46 can be movably fitted into the positioning holes 45. Insertion holes 35 matching the positioning components 46 are respectively provided on gate 1 3a, gate 2 3b, and gate 3 3c. By inserting the positioning components 46 into the corresponding gate's insertion holes 35, the horizontal plate 44 can be connected to the corresponding gate via the positioning components 46. When the rotating component rotates the control screw 41, driving the screw sleeve 43 and the horizontal plate 44 to move, the positioning components 46 can cause the corresponding gate to move within the concrete masonry 1 and extend out of the gate slot 2. Figure 3As shown, an adjustment slot 9 is provided on the upper outer wall of the concrete masonry 1, and a cover plate 10 is matched inside the adjustment slot 9. When it is necessary to replace the extended gate, firstly, the screw 41 is driven to rotate in the opposite direction by the rotating component. Through the cooperation of the screw 41 and the screw sleeve 43, the horizontal plate 44 and the positioning component 46 drive the gate 2 3b to be completely retracted into the concrete masonry 1. Then, the cover plate 10 is opened, and the positioning component 46 is taken out from the positioning hole 45 corresponding to the gate 2 3b and inserted into the positioning hole 45 corresponding to the gate 3c through the adjustment slot 9. The insertion position of the positioning component 46 is adjusted. When the screw 41 rotates forward and the screw sleeve 43 cooperates to drive the horizontal plate 44 and the positioning component 46 to move, the gate 3c can be controlled to extend out of the concrete masonry 1 and connect, realizing the gate The gate can be changed in several ways. When the river level is high during the flood season, gate 3c with a larger discharge orifice can be used. When the river level is low during the non-flood season, gate 3a with a smaller discharge orifice can be used. When the water level is normal, gate 3b can be selected. As the ecological water demand changes with the seasons, the gate with the corresponding discharge capacity for a certain orifice is determined to be activated. Gates with other discharge capacities can be temporarily stored in the gate chamber of the adjacent concrete masonry 1. This allows the discharge capacity of the gates to be adjusted and changed according to the water level in different seasons and periods. This allows for the adjustment of the ecological flow discharge according to the water level during the flood season and non-flood season, achieving flexible adjustment of ecological flow discharge and ensuring that the ecological flow discharge can meet the requirements at any time.

[0018] In practical use, the low-head dam multi-frequency ecological expansion gate of this invention first selects a gate of appropriate height according to the water level during the flood season or non-flood season. For example, when the water level is high during the flood season and a large discharge volume is required, gate 3c is selected. The cover plate 10 is opened, and the positioning piece 46 is inserted into the corresponding positioning hole 45 of gate 3c and inserted into the insertion hole 35. Then, the rotating block 410 is rotated by a tool or manually, which drives the screw 41 to rotate. With the cooperation of the screw 41 and the screw sleeve 43, the gate 3c is pushed to move outward by the horizontal plate 44. When the gates 3c on both sides are connected, the rotating block 410 is stopped. At this time, the gate 3c intercepts the upstream river water, and part of the river water flows from the upstream to the downstream through the discharge hole of the gate 3c, which satisfies the water storage while realizing the release of ecological flow. Example

[0019] Based on Example 1, the similarities between this example and Example 1 will not be repeated here. The differences are as follows: Figure 5 and Figure 6 As shown, the multi-frequency telescopic gate 3 is equipped with a gate fine-tuning mechanism 5. Adjustment chambers 32 are horizontally opened within the main gates 31 of gate 1 (3a), gate 2 (3b), and gate 3 (3c). A movable gate 33 is vertically slidably fitted within each adjustment chamber 32. A row of drainage holes is opened at the bottom of the main gate 31, and two rows of drainage holes are opened vertically above the movable gate 33. Figure 7 As shown, a vertically expandable spring airbag 34 is connected inside the regulating cavity 32. The upper end of the spring airbag 34 is connected to the movable gate 33. Multiple spring airbags 51 are vertically arranged evenly on the water-facing side of the concrete masonry 1. When the river water flows, the spring airbags 51 can be compressed to expand and contract laterally. An air guide pipe 52 is connected to the side of each spring airbag 51. The ends of the multiple air guide pipes 52 are connected through a confluence pipe 53, and the side of the confluence pipe 53 is connected to three branch pipes 54. The three branch pipes 54 are respectively connected to the spring airbags 34 inside the gate 3a, gate 3b, and gate 3c. Furthermore, the middle part of the diversion pipe 54 is a retractable conduit structure. When the gate intercepts upstream river water, the river water will exert pressure on the second spring airbag 51. Due to the influence of external factors at the same time, the river water level will also change. When the river water level is at a normal height, the pressure inside the first spring airbag 34 and the second spring airbag 51 is balanced, the height of the movable gate 33 remains unchanged, and the uppermost drain hole of the movable gate 33 completely leaks out. River water can flow out normally from the drain holes on the surfaces of the movable gate 33 and the main gate 31. When the river water level is slightly higher due to rain, the water pressure on the second spring airbag 51 is slightly greater. At this time, the first spring airbag... The gas entering 34 will push the movable gate 33 upward, increasing the gate height and preventing river water from flowing above the gate. Instead, water will flow out through the spillway. Furthermore, the upward movement of the movable gate 33 will partially or completely expose the lower spillway, increasing the number of spillway holes and thus increasing the discharge capacity. When the water level is slightly lower due to weather conditions, the water pressure on the second spring airbag 51 is slightly lower. At this time, the gas pressure inside the first spring airbag 34 is greater than the gas pressure inside the second spring airbag 51. Gas from the first spring airbag 34 enters the second spring airbag 51, causing the height of the movable gate 33 to decrease adaptively according to the water level. With the spillway partially blocked, the discharge volume is reduced. Therefore, the gate fine-tuning mechanism 5 can precisely adjust the gate discharge volume based on slight changes in water level caused by weather conditions during the same period, achieving precise control of ecological flow release and water storage. Each of the three diversion pipes 54 is equipped with a valve 55, which can be configured as a solenoid valve. By controlling the three valves 55 respectively, the corresponding diversion pipe 54 can be opened according to the gate being used, while the other diversion pipes 54 are closed. This ensures that gas can only enter the gate being used through the opened diversion pipe 54 for fine-tuning of the gate height, thus achieving precise control.

[0020] In practical use, the low-head river dam multi-frequency ecological expansion gate of this invention, when intercepting and releasing upstream river water, the river flow will exert pressure on the spring airbag 2 51. At the same time, weather changes will cause water level changes. When it rains, the river water level rises and the water pressure increases, and the pressure of the river water on the spring airbag 2 51 increases. The gas in the spring airbag 2 51 is forced into the spring airbag 1 34. The spring airbag 1 34 bulges upward and pushes the movable gate 33 upward, realizing the fine adjustment of the height of the gate 3 3c. While increasing the water interception height, the discharge volume of the gate 3 3c is increased. When the weather is dry, the river water level drops and the pressure of the river water on the spring airbag 2 51 decreases. The gas in the spring airbag 1 34 enters the spring airbag 2 51, and the movable gate 33 moves downward, reducing the water interception height and the discharge volume of the gate 3 3c, so that the gate 3 3c can meet the water storage requirements.

[0021] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-head river dam with multi-frequency ecological expansion joint, comprising symmetrically arranged concrete masonry, characterized in that: It also includes a multi-frequency telescopic gate, a transmission mechanism, and a gate fine-tuning mechanism. The multi-frequency telescopic gate includes multiple gates that are laterally slidably fitted into the concrete masonry. The surface of each gate has drainage holes evenly distributed, and the diameter and number of drainage holes on each gate surface are different. The side of the concrete masonry has gate slots that match the gates, allowing the gates to move out of the gate slots. The transmission mechanism includes a screw rod laterally disposed within the concrete masonry. A rotating component controlling the rotation of the screw rod is provided at its end. A threaded sleeve is threaded onto the screw rod, and a horizontal plate is connected to the side of the threaded sleeve. Multiple sets of positioning holes corresponding to the positions of each gate are provided. Positioning components are movably fitted inside the positioning holes, and each gate has a matching insertion hole. The positioning component is inserted into the corresponding insertion hole of the gate, so that the horizontal plate is connected to the corresponding gate through the positioning component. When the screw rotates, it drives the screw sleeve and the horizontal plate to move, thereby driving the corresponding gate to move and extend. An adjustment slot is provided on the upper outer part of the concrete masonry, and a cover plate is matched inside the adjustment slot. The insertion position of the positioning component can be adjusted through the adjustment slot, so that the positioning component can be connected to the gate at different positions. The gate includes a main gate that is slidably fitted into the concrete masonry. A regulating chamber is laterally opened within the main gate, and a movable gate is vertically slidably fitted within the regulating chamber. The movable gate is connected to the regulating chamber via a vertically telescopic spring airbag. The gate fine-tuning mechanism includes multiple spring airbags arranged vertically on the side of the concrete masonry. Each spring airbag can extend and retract laterally under force. A merging pipe is located on the side of each spring airbag, and each spring airbag is connected to the merging pipe via an air guide pipe. The merging pipe is connected to the spring airbag in each gate via multiple branch pipes, and a valve is provided on each branch pipe.

2. The low-head dam multi-frequency ecological expansion gate according to claim 1, characterized in that: The rotating component includes a bevel gear one fixedly mounted on the end of a screw, a rotating shaft vertically mounted on the concrete masonry, a bevel gear two meshing with the bevel gear one fixedly mounted on the lower end of the rotating shaft, and a rotating block fixedly mounted on the upper end of the rotating shaft.

3. The low-head dam multi-frequency ecological expansion gate according to claim 1, characterized in that: There are two screws, which are symmetrically arranged on the inner top of the concrete masonry. The ends of the two screws are connected by a sprocket assembly. By setting two screws, the forces on both sides of the horizontal plate are balanced when it drives the gate to move.

4. The low-head dam multi-frequency ecological expansion gate according to claim 1, characterized in that: The bottom of the concrete masonry is provided with a horizontal groove corresponding to the position of the multi-frequency telescopic gate. Below the gate, there is a slider that matches the groove. The multi-frequency telescopic gate is slidably fitted into the groove by the slider.

5. The low-head dam multi-frequency ecological expansion gate according to claim 1, characterized in that: A sealing gasket is installed at the output end of the gate slot to ensure the airtightness of the concrete masonry.

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