Combined dam body for water environment treatment

Abstract

The invention discloses a combined dam body for water environment treatment. The problems that a traditional dam body is difficult to flexibly adjust according to the water level and energy consumption is high are solved. The combined dam body comprises a dam platform and a dam bottom which are in a step shape, a first water baffle, a second water baffle and a third water baffle which are sequentially hinged end to end are arranged on the dam platform, folding or unfolding of a water baffle combination is achieved through upwarp or downward pressing of the suspended end of the first water baffle, and when the first water baffle is unfolded, the first water baffle and the platform face of the dam platform form a triangular protruding structure to stop water. The first water baffle is provided with a sliding rail and a balancing weight, and when the inclination angle reaches the critical value, the balancing weight slides to the lowest position and locks the structure. A U-shaped channel is formed in the dam bottom, a built-in pull rope is connected with the suspended end of the first water baffle and the first air bag, when the water level rises, the air bag floats upwards, and the first water baffle is pulled downwards through the pull rope so that the dam body can be rapidly built. The buoyancy of the air bag is used as low-power-consumption triggering power, the combined dam body is rapidly built and locked in combination with the balancing weight, the structure is simple, cost is low, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] This invention relates to the field of water environment management technology, specifically to a combined dam body for water environment management, applicable to scenarios such as water level regulation, water flow control, and water environment restoration in rivers, lakes, reservoirs, and other water bodies. Background Technology

[0002] In the process of water environment management, it is often necessary to control water flow according to actual needs. For example, during the flood season, it is necessary to prevent water levels from rising too high and overflowing the dikes, and during the dry season, water should be stored to ensure ecological water use and agricultural irrigation. Traditional dam structures are usually fixed, making it difficult to quickly adjust the water-retaining height and structural shape according to changes in water level. When the water level rises suddenly, the fixed dam cannot respond in time, which may lead to water overflow and cause disasters; while when the water level drops, the fixed dam may obstruct the normal flow of water and affect the ecological balance of the aquatic environment.

[0003] Furthermore, while some adjustable dam structures can achieve a certain degree of regulation, they often require complex power and control systems, which not only increases manufacturing costs and maintenance difficulty but also results in high energy consumption, failing to meet energy conservation and environmental protection requirements. Therefore, developing a dam device that can quickly respond to water level changes, has a simple structure, and low energy consumption is of significant practical importance. Summary of the Invention

[0004] The purpose of this invention is to provide a combined dam body for water environment management, which utilizes the buoyancy of airbags as a low-power triggering force, combined with counterweights, to achieve rapid establishment and locking of the combined dam body, so as to adapt to the water environment management needs under different water levels and flow conditions.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a combined dam body for water environment management, comprising a dam platform and a dam bottom arranged in a stepped manner, wherein the dam platform is located at a high position and the dam bottom is located at a low position; The dam platform is provided with a first water-retaining plate, a second water-retaining plate, and a third water-retaining plate that are hinged together from end to end. The middle part of the first water-retaining plate is hinged to the edge of the dam platform near the bottom of the dam. The first water-retaining plate on one side of the middle hinged part is always located above the dam platform, while the first water-retaining plate on the other side is always suspended above the bottom of the dam. The end of the third water-retaining plate away from the second water-retaining plate is hinged to the dam platform. Both ends of the upper surface of the first baffle plate are provided with baffles, and a slide rail is provided between the two baffles, on which a counterweight is slidably arranged; A U-shaped channel is excavated at the bottom of the dam, and a rope is threaded through the U-shaped channel. One end of the rope is connected to the end of the suspended part of the first water-retaining plate, and the other end is connected to the first airbag.

[0006] Furthermore, a water-containing cavity is provided inside the dam platform, and a retaining wall is provided between the water-containing cavity and the bottom of the dam. An inlet is provided at the top of the retaining wall to connect the water-containing cavity and the bottom of the dam. A second airbag is provided inside the water-containing cavity, and a top column is connected to the second airbag. The top column extends upward through the dam platform and contacts the bottom surface of the first water-retaining plate.

[0007] Furthermore, the two baffles are a movable baffle and a fixed baffle, wherein the movable baffle is detachably installed within the range of the suspended part of the first baffle.

[0008] Furthermore, the upper surface of the suspended part of the first baffle plate is provided with two rows of symmetrical positioning grooves along its length, and both ends of the movable baffle plate are provided with insertion holes, which are aligned with the positioning grooves.

[0009] Furthermore, a positioning rope is connected to the counterweight, and a positioning nail is provided on the dam platform.

[0010] Furthermore, a buoy is attached to the positioning rope.

[0011] Furthermore, the second baffle plate and the third baffle plate are hinged together by a ratchet mechanism.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. Low power consumption triggering: This invention uses the buoyancy of the first airbag as the triggering power. When the water level rises, the airbag automatically floats up without the need for an additional electric or mechanical power source, which greatly reduces energy consumption and meets the requirements of energy conservation and environmental protection.

[0013] 2. Rapid dam construction: The airbag floats up and pulls down the first water-retaining plate by a rope, causing the water-retaining plate assembly to quickly unfold and form a triangular raised structure. This can establish an effective water-retaining dam in a short time and respond promptly to emergencies such as rising water levels.

[0014] 3. Reliable structural locking: Through the design of the counterweight, when the inclination angle of the first water-retaining plate reaches the critical value, the counterweight automatically slides to the lowest point of pressure and is blocked by the baffle, so that the water-retaining plate combination maintains a stable triangular raised structure, ensuring that the dam can reliably function under different water flow conditions and preventing deformation or collapse due to water flow impact.

[0015] 4. Simple structure and low cost: The entire combined dam structure is relatively simple, mainly composed of water-retaining plates, counterweights, airbags and ropes, etc. It does not require complex control systems and power equipment, which reduces manufacturing costs and maintenance difficulties, and facilitates large-scale promotion and application. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of the present invention (when the dam body is not in use); Figure 2 This is a schematic diagram of the overall structure of the present invention (when the dam body is already in use); Figure 3 This is a top view of the first water baffle of the present invention.

[0017] In the diagram: 100, dam platform; 200, dam bottom; 300, water-receiving cavity; 400, retaining wall; 500, water inlet; 1, first water-retaining plate; 2, movable baffle; 3, fixed baffle; 4, slide rail; 5, counterweight; 6, positioning groove; 7, positioning rope; 8, float; 9, positioning nail; 10, second water-retaining plate; 11, third water-retaining plate; 12, first airbag; 13, pull rope; 14, second airbag; 15, top column. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Please see Figure 1-3 This embodiment provides a combined dam body for water environment management in urban landscape rivers or small ecological wetlands. It can automatically or semi-automatically complete the dam construction and collapse process according to water storage or flood control needs. The combined dam body of this embodiment is installed in a landscape river channel with a width of 5 meters and a normal water depth of 0.8 meters. The riverbed and both banks have been hardened. The combined dam body will completely span the entire river channel. The combined dam body of this embodiment includes a stepped dam platform 100 and a dam base 200, wherein the dam platform 100 is located at a higher position and the dam base 200 is located at a lower position.

[0023] For example, dam abutment 100 is constructed of C30 grade reinforced concrete cast on one side of the river channel, forming a platform shape. Its top surface is 1.2 meters above the river channel bottom. Dam abutment 100 is 1.5 meters long in the direction of water flow, and its width perpendicular to the water flow direction is 5.2 meters (slightly larger than the 5-meter width of the river channel to ensure good connection and sealing with both banks). Dam abutment 100 has a smooth surface and is pre-embedded with stainless steel hinge bases. Dam bottom 200 is the hardened river channel bottom. Its elevation is 1.2 meters lower than dam abutment 100, forming a distinct stepped structure.

[0024] The dam body also includes a water-retaining plate assembly, which is the core component for achieving the water-retaining function. This assembly consists of three water-retaining plates and connecting parts. Specifically, the dam abutment 100 is equipped with a first water-retaining plate 1, a second water-retaining plate 10, and a third water-retaining plate 11, which are hinged together end-to-end. The first water-retaining plate 1 is hinged at the middle edge of the dam abutment 100 near the dam bottom 200. The first water-retaining plate 1 on one side of the hinged section is always positioned above the dam abutment 100, while the first water-retaining plate 1 on the other side is always suspended above the dam bottom 200. The third water-retaining plate 11 is located away from the second water-retaining plate 10. One end is hinged to the dam abutment 100. When the first water-retaining plate 1, which is suspended in the air, is tilted upward, the first water-retaining plate 1, the second water-retaining plate 10, and the third water-retaining plate 11 will fold in a Z-shape and gradually approach the dam abutment 100. When the first water-retaining plate 1, which is suspended in the air, is pressed down, the second water-retaining plate 10 and the third water-retaining plate 11 will unfold in a straight line and gradually move away from the dam abutment 100. At this time, the first water-retaining plate 1, the second water-retaining plate 10, and the third water-retaining plate 11 form a triangular raised structure with the platform of the dam abutment 100. This triangular raised structure is the combined dam body for water environment management.

[0025] For example, all the water-retaining plates are 5.2 meters wide to ensure complete coverage of the river channel cross-section. All water-retaining plates are made of 10 mm thick 304 stainless steel sheet, with multiple H-beams welded along their width as reinforcing ribs to resist the enormous lateral water pressure. All hinges use heavy-duty stainless steel hinges with neoprene rubber seals to ensure connection flexibility and sealing during water retention. Specifically, the first water-retaining plate 1 is 2.4 meters long and 5.2 meters wide in the direction of water flow. Its centerline (1.2 meters from each end) is hinged to the edge of the dam abutment 100 near the dam bottom 200 via heavy-duty hinges. Therefore, a 1.2-meter section of this water-retaining plate always lies flat above the dam abutment 100, while another 1.2 meters is suspended above the dam bottom 200. The second water-retaining plate 10 is 1.0 meter long and 5.2 meters wide in the direction of water flow. One end is hinged to the end of the suspended section of the first water-retaining plate 1 across its full width. The third water-retaining plate 11 is 1.0 meter long and 5.2 meters wide in the direction of water flow. One end of it is hinged to the other end of the second water-retaining plate 10 at full width, and the other end is hinged to the pre-embedded base on the platform of the dam abutment 100 at a distance of 1.8 meters from the edge.

[0026] The dam body also includes a self-locking mechanism, which is set on the upper surface of the first water-retaining plate 1 and is used to lock it after the dam body is built. Specifically, baffles are provided at both ends of the upper surface of the first water-retaining plate 1, and a slide rail 4 is provided between the two baffles. A counterweight 5 is slidably set on the slide rail 4. The two baffles are used to limit the sliding range of the counterweight 5. As the suspended part of the first water-retaining plate 1 is pressed down, the inclination angle of the first water-retaining plate 1 will gradually increase. When the inclination angle of the first water-retaining plate 1 reaches the critical value, the component force of the counterweight 5 in the downward direction along the slide rail 4 will be greater than the static friction force on the counterweight 5 itself. At this time, the counterweight 5 will slide down along the slide rail 4 to the lowest point of the first water-retaining plate 1 and be blocked by the baffle. At this time, the first water-retaining plate 1 will maintain the downward posture. The first water-retaining plate 1, the second water-retaining plate 10, and the third water-retaining plate 11 also maintain a triangular raised structure with the platform of the dam abutment 100.

[0027] For example, the slide rail 4 is a circular track (30 mm in diameter) made of 316L stainless steel, which is set along the length direction (2.4 meters) of the first baffle plate 1, and its surface is finely polished. The counterweight 5 is a cast iron block with a total mass of 80 kg and a narrow width (e.g., 0.5 m), but it can slide freely on the slide rail 4. The slide rail 4 and the counterweight 5 are connected by a movable through-type connection.

[0028] The dam body also includes a drive mechanism, which is used to trigger the dam construction process. The drive mechanism includes a U-shaped channel, a pull rope 13, and a first airbag 12. Specifically, a U-shaped channel is excavated on the bottom 200 of the dam, and a pull rope 13 is threaded through the U-shaped channel. One end of the pull rope 13 is connected to the end of the suspended part of the first water-retaining plate 1, and the other end is connected to the first airbag 12. When the first airbag 12 floats up, the first airbag 12 will pull down the end of the suspended part of the first water-retaining plate 1 through the pull rope 13, thereby gradually increasing the inclination angle of the first water-retaining plate 1.

[0029] For example, the U-shaped channel at the bottom 200 of the dam, i.e., the bottom of the riverbed, is constructed of pre-buried HDPE pipes, and the pull rope 13 is made of Dyneema rope with a diameter of 10 mm. One end of the pull rope 13 is connected to the bottom center position (i.e., the midpoint in the width direction) of the suspended end of the first water-retaining plate 1 via a stainless steel shackle. The first airbag 12 is a sealed airbag made of double-layer reinforced PVC mesh fabric, connected to the other end of the pull rope 13.

[0030] The working process of this combined dam body is divided into two stages: "dam construction" and "dam collapse". The specific process is as follows: 1. Dam construction process (formation of triangular raised structures) During the non-water storage period, the combined dam body is in a folded state. The first, second, and third water-retaining plates are arranged in a "Z" shape and tightly attached to the surface of the dam abutment 100. The suspended portion of the first water-retaining plate 1 sags slightly due to its own weight. The counterweight 5 is located at a higher position on the slide rail 4 of the first water-retaining plate 1, and the first airbag 12 is in an deflated state, submerged at the bottom of the water or placed on the bank. When water storage or raising the upstream water level is required, the control system starts the air compressor and inflates the first airbag 12 through the solenoid valve. As the first airbag 12 is inflated, its buoyancy in the water increases sharply. The floating first airbag 12 applies a strong downward pull to the bottom of the suspended end of the first water-retaining plate 1 through the pull rope 13. Under the action of the pull force, the first water-retaining plate 1 begins to rotate around the central hinge, and its suspended end is pulled downward, causing the tilt angle to gradually increase. Based on the lever and linkage principles, the rotation of the first baffle plate 1 will push up the second baffle plate 10, which is hinged to it. The second baffle plate 10 and the third baffle plate 11 then unfold, gradually moving away from the dam abutment 100 and extending in a "one-line" shape. When the inclination angle of the first baffle plate 1 reaches the designed critical value, the component of the counterweight block 5's own weight along the slide rail 4 will be greater than the maximum static friction force it experiences. At this point, the counterweight block 5 begins to overcome the static friction force and slides downward along the slide rail 4. The counterweight block 5 quickly slides to the lowest end (suspended end) of the first baffle plate 1 and is blocked by the end baffle. At this time, the 80 kg counterweight block 5 is located at the farthest end of the lever arm, generating a huge locking torque, firmly pressing the first baffle plate 1 into a downward tilted posture. At this point, the first, second, and third baffle plates and the dam abutment 100 together form a stable triangular raised structure, and the dam body is completed. The upstream water level begins to rise, and the water flow is effectively blocked. After the dam construction process is completed, the first airbag 12 can be vented without affecting the locking state of the dam body.

[0031] 2. Dam collapse process (returning to a Z-shaped folded state) When flood control or water level reduction is required, the counterweight 5 can be reset using electric equipment (such as an electric winch), that is, the counterweight 5 is moved to the other end of the first water-retaining plate 1. In the initial stage when the counterweight 5 is pulled upward, the "locking torque" it provides gradually decreases. After the counterweight 5 passes the hinge axis in the middle of the first water-retaining plate 1, the direction of the torque generated by its gravity is fundamentally reversed. Previously, its gravity acted to press down (lock) the suspended end of the first water-retaining plate 1; now, its gravity acted to tilt its suspended end upward (unlock and fold). At this time, the original "locking torque" is transformed into a powerful "auxiliary folding torque". Driven by this powerful "auxiliary folding torque", the suspended end of the first water-retaining plate 1 begins to tilt upward forcefully. This tilting action, through the mechanical linkage of the hinge, directly pulls the second water-retaining plate 10 and the third water-retaining plate 11, causing them to retract and fold from their unfolded "I-shaped" state towards the dam platform 100. The entire process is seamless and mandatory. Ultimately, the three water-retaining plates will completely fold, returning to their initial "Z"-shaped state, tightly adhering to the dam abutment 100mm. At this point, the dam collapse process is complete, and the river channel is restored to unobstructed flow. The entire process is actively accomplished by the electric winch and the positional transfer of counterweight 5, without relying on uncertain water flow conditions, ensuring the reliability and precision of the operation.

[0032] This embodiment utilizes a sophisticated mechanical structure design, employing the buoyancy of the first airbag 12 as a low-power triggering force, combined with a gravity self-locking mechanism, to achieve rapid establishment and locking of the combined dam body. The entire system is highly automated and reacts quickly, making it particularly suitable for ecological management and landscape water conservancy projects that require frequent water level adjustments.

[0033] Furthermore, such as Figure 1-2 As shown, a water-receiving cavity 300 is provided within the dam abutment 100. A retaining wall 400 separates the water-receiving cavity 300 from the dam bottom 200. An inlet 500, connecting the water-receiving cavity 300 and the dam bottom 200, is located at the top of the retaining wall 400. A second airbag 14 is located within the water-receiving cavity 300, and a top column 15 is connected to the second airbag 14. The top column 15 extends upwards through the dam abutment 100 and contacts the bottom surface of the first baffle plate 1. The retaining wall 400 separates the water-receiving cavity 300 from the dam bottom 200, with the inlet 500 only located at the top of the retaining wall 400. During water level rise, water does not immediately enter the water-receiving cavity 300 but must first rise to the height of the inlet 500 before flowing in. This design creates a relatively independent small space within the water-receiving cavity 300 compared to the larger external space, achieving the purpose of delayed water intake within the water-receiving cavity 300. Because the water-containing cavity 300 is relatively small, when water begins to flow in, the same volume of water flowing in will cause the water level in the water-containing cavity 300 to rise rapidly. This rapid rise in water level provides a basis for a rapid response to subsequent changes in the buoyancy of the second airbag 14.

[0034] As the water level in the water-receiving cavity 300 rises rapidly, the buoyancy force on the second airbag 14 increases dramatically. According to the principle of buoyancy, the buoyant force on an object in a liquid is equal to the weight of the liquid it displaces. The rapid rise in the water level in the water-receiving cavity 300 causes a rapid increase in the volume of water displaced by the second airbag 14, thereby increasing its buoyant acceleration. This increased buoyancy in the second airbag 14 pushes the connected top column 15 upwards. Due to the large buoyant acceleration, the top column 15 gains a large velocity in a short time, thus gaining greater momentum. Simultaneously, this movement is accompanied by an impact effect, making the force exerted by the top column 15 on the first baffle plate 1 more significant.

[0035] The high momentum impact force of the top column 15 acts on the bottom surface of the first water-retaining plate 1, causing the suspended part of the first water-retaining plate 1 to press down more rapidly. This rapid downward pressing action can more effectively push the first water-retaining plate 1 to rotate around the central hinge, thereby driving the second water-retaining plate 10 and the third water-retaining plate 11, which are hinged to it, to unfold. The increased downward speed of the suspended part of the first water-retaining plate 1 makes the entire dam construction process faster. When it is necessary to impound water or raise the upstream water level, a stable triangular ridge structure can be formed more quickly, effectively blocking the water flow and improving the efficiency and response speed of dam construction.

[0036] Throughout the dam construction process, the second airbag 14 provides additional power support for the downward pressure of the first baffle plate 1 through the buoyancy change caused by the rise in water level. Compared with the traditional method of driving dam construction with a high-power power source, the second airbag 14 utilizes the buoyancy generated by natural water level changes to achieve the purpose of low-power triggering of dam construction. This not only reduces energy consumption but also improves the economy and sustainability of the system. When the second airbag 14 is no longer needed to float, the water in the water-containing chamber 300 can be pumped out.

[0037] Furthermore, such as Figure 3 As shown, the two baffles are a movable baffle 2 and a fixed baffle 3, with the movable baffle 2 being detachably installed within the suspended portion of the first water-retaining plate 1. This allows the installation position of the movable baffle 2 to be adjusted according to actual needs. For example, under different water level conditions, water flow velocities, or water-retaining requirements, the sliding effect of the counterweight 5 on the slide rail 4 can be optimized by changing the installation position of the movable baffle 2, thereby affecting the rotation of the first water-retaining plate 1 and the entire dam construction and collapse process. In different water environment management scenarios, it may be necessary to adjust parameters such as the water-retaining height and water-retaining strength of the dam. The detachable installation feature of the movable baffle 2 allows the dam to adapt more flexibly to these changes, improving the dam's versatility and adaptability.

[0038] Specifically, the movable baffles 2 at different positions determine the different sliding endpoints of the counterweight 5. The closer the sliding endpoint of the counterweight 5 is to the end point of the suspended part of the first water-retaining plate 1, the greater the downward angle of the suspended part of the first water-retaining plate 1. The greater the height of the triangular raised structure formed by the first, second, and third water-retaining plates and the dam abutment 100, the more effectively this tall dam structure can block water flow and improve water retention capacity. It is suitable for water environment management scenarios that require large water storage capacity and high water level rise, such as the initial stage of some large reservoirs. For water storage or water level regulation of landscape lakes; conversely, the closer the sliding endpoint of the counterweight 5 is to the middle hinge of the first water baffle 1, the smaller the downward angle of the suspended part of the first water baffle 1, and the smaller the height of the triangular raised structure formed by the first, second, and third water baffles and the platform 100 of the dam. This low dam structure has a relatively weak obstruction effect on water flow and is suitable for some scenarios where the requirement for water level rise is not high and the main function is to slightly regulate water flow, such as some small landscape canals or water flow control in wetland reserves.

[0039] Furthermore, such as Figure 3 As shown, the upper surface of the suspended part of the first baffle plate 1 has two symmetrical rows of positioning grooves 6 along its length. Both ends of the movable baffle plate 2 have insertion holes that are aligned with the positioning grooves 6. The movable baffle plate 2 can be positioned and installed by simultaneously inserting a pin into both the insertion hole and the positioning groove 6. This structure makes it very convenient to disassemble and assemble the movable baffle plate 2, thus facilitating the adjustment of its position.

[0040] Furthermore, such as Figure 1-2 As shown, a positioning rope 7 is connected to the counterweight 5, and a positioning nail 9 is provided on the dam platform 100. When it is necessary to maintain the collapsed state of the dam, the positioning rope 7 can be tied to the positioning nail 9 to ensure that the counterweight 5 will not move easily.

[0041] Furthermore, such as Figure 1-2 As shown, a float 8 is attached to the positioning rope 7 to ensure that the positioning rope 7 can be easily located by the float 8 after the dam is built. This facilitates the quick location of the positioning rope 7 when the dam needs to be collapsed, and the counterweight 5 can be pulled up with the help of the positioning rope 7.

[0042] Furthermore, the second and third baffle plates 10 are hinged together via a ratchet mechanism. The core characteristic of the ratchet mechanism is that it allows unidirectional movement while preventing reverse movement. During dam construction, the second and third baffle plates 11 need to be unfolded from their folded state until they form a straight line (approximately 180°). This unfolding action is precisely the direction of movement "allowed" by the ratchet mechanism. Due to the presence of the ratchet mechanism, each slight unfolding angle of the baffle plates is immediately locked. Even if the driving force disappears, the dam body will firmly maintain its current unfolded height and will never retract. This greatly improves the stability and fault tolerance of the dam construction process. When it is necessary to restore the second and third baffle plates 10 to their folded state, the ratchet mechanism can be reversed with manual intervention (e.g., by lifting the ratchet pawl).

[0043] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A composite dam body for water environment management, characterized in that: It includes a stepped dam platform (100) and a dam base (200), wherein the dam platform (100) is located at a higher position and the dam base (200) is located at a lower position; The dam platform (100) is provided with a first water-retaining plate (1), a second water-retaining plate (10), and a third water-retaining plate (11) that are hinged together from end to end. The middle part of the first water-retaining plate (1) is hinged to the edge of the dam platform (100) near the bottom of the dam (200). The first water-retaining plate (1) on one side of the middle hinged part is always located above the dam platform (100), while the first water-retaining plate (1) on the other side is always suspended above the bottom of the dam (200). The end of the third water-retaining plate (11) away from the second water-retaining plate (10) is hinged to the dam platform (100). Both ends of the upper surface of the first baffle (1) are provided with baffles, and a slide rail (4) is provided between the two baffles. A counterweight (5) is slidably arranged on the slide rail (4). A U-shaped channel is excavated on the bottom of the dam (200), and a pull rope (13) is threaded through the U-shaped channel. One end of the pull rope (13) is connected to the end of the suspended part of the first water-blocking plate (1), and the other end is connected to the first airbag (12).

2. The combined dam body for water environment management according to claim 1, characterized in that: A water-containing cavity (300) is provided inside the dam platform (100). A retaining wall (400) is provided between the water-containing cavity (300) and the dam bottom (200). An inlet (500) is provided at the top of the retaining wall (400) to connect the water-containing cavity (300) and the dam bottom (200). A second airbag (14) is provided inside the water-containing cavity (300). A top column (15) is connected to the second airbag (14). The top column (15) extends upward and penetrates to the platform of the dam platform (100) and contacts the bottom surface of the first water-retaining plate (1).

3. The combined dam body for water environment management according to claim 1, characterized in that: The two baffles are a movable baffle (2) and a fixed baffle (3), wherein the movable baffle (2) is detachably installed within the range of the suspended part of the first baffle (1).

4. The combined dam body for water environment management according to claim 3, characterized in that: The upper surface of the suspended part of the first baffle (1) is provided with two rows of symmetrical positioning grooves (6) along its length direction. Both ends of the movable baffle (2) are provided with insertion holes, and the insertion holes are aligned with the positioning grooves (6).

5. The combined dam body for water environment management according to claim 1, characterized in that: The counterweight (5) is connected to a positioning rope (7), and the dam platform (100) is provided with positioning nails (9).

6. The combined dam body for water environment management according to claim 5, characterized in that: A buoy (8) is attached to the positioning rope (7).

7. The combined dam body for water environment management according to claim 1, characterized in that: The second baffle plate (10) and the third baffle plate (11) are hinged by a ratchet mechanism.

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