Device for in-situ planting and observation of submerged plants

Abstract

The present invention relates to the field of water ecological restoration, and more specifically, to a device for in-situ planting and observing submerged plants, comprising an above-water device, an underwater device, and a fixed rod, wherein the above-water device is connected to the fixed rod and can move up and down along the fixed rod, and the underwater device is arranged below the above-water device; the above-water device comprises a floating bed and a skeleton arranged on the floating bed, and is characterized in that the skeleton comprises a first frame and a second frame, the first frame is arranged above the second frame, and a plurality of support rods are further arranged between the first frame and the second frame, one end of the support rod is fixed to the first frame, and the other end is fixed to the second frame. The device forms a groove-shaped structure by providing a double-layer frame and cooperating with the support rods, thereby clamping and fixing the floating bed. The device has a simple structure, low manufacturing cost, strong practicality, and is easy to manufacture. It can be produced in large quantities as needed to meet experimental requirements.

Description

Technical Field

[0001] The present invention relates to the field of water ecological restoration, and more specifically, to a device for in-situ planting and observing submerged plants. Background Art

[0002] Submerged macrophytes play a crucial role in lake ecosystems, absorbing nutrients, secreting allelopathic substances that inhibit algal growth and reproduction, and providing diverse habitats for other aquatic organisms. Furthermore, submerged macrophytes are not only the primary producers in shallow lake ecosystems but also a crucial biological measure for controlling pollution loads and improving water quality within lakes. In shallow lake ecosystems in particular, submerged macrophytes play a crucial role in reversing the algal-dominated turbid water state to the grass-dominated clear water state. Restoring submerged macrophytes is crucial for rebuilding healthy aquatic ecosystems, maintaining good water quality and rich species diversity in shallow lakes.

[0003] In real-world environments, the growth of submerged macrophytes is constrained by environmental factors such as water depth, temperature, pH, light intensity, and turbidity. Underwater effective light intensity is considered one of the most important factors affecting the growth and distribution of submerged macrophytes, and a lack of underwater light is the direct cause of their extinction. Water depth and turbidity are two primary factors that influence underwater light intensity, reducing effective light intensity. In water, light attenuation depends on wavelength, intensity, and light quality, both of which vary with water depth. With increasing water depth, the ratio of red to far-red light increases, leading to morphological changes in submerged macrophytes. Furthermore, submerged macrophytes are typically shade-loving, and excessive light intensity can inhibit their photosynthesis, impacting their normal growth and development. Different submerged macrophytes have varying water level tolerance limits. The magnitude, frequency, timing, duration, and rate of water level fluctuations all impact aquatic vegetation. As an in-situ restoration and control technology for eutrophic water bodies, ecological floating bed technology has been widely studied and applied. Ecological floating beds are generally planted with submerged plants, but existing floating beds for planting submerged plants have certain defects, such as the one published in CN 211080122. The trough is fixedly mounted on a support frame, and the support frame is fixedly connected to the support frame at the bottom thereof with a plurality of support rods, the support rods being fixedly connected to the support frame at the center of the top of the inner cavity of the trough. The planting net of the planting device is set in the middle of the device and cannot be raised or lowered, so the submerged plants cannot be observed frequently and the demand cannot be met.Another example is China patent application number CN 201621159533.5 discloses a safe shallow lake submerged plant planting device, which includes: a buoyant float layer, a float fixing frame, a planting frame, a submerged plant planting bed and a fishing net with a bottom, the buoyant float layer is composed of a plurality of detachable floats connected, the float fixing frame is composed of a plurality of float fixing columns, the lower end of each float fixing column is fixed to the bottom of the shallow lake, the buoyant float layer is connected to the float fixing columns, and the buoyant float layer can slide up and down on the float fixing columns, the planting frame is horizontally fixed to the buoyant float layer, a plurality of planting bed fixing rods are fixed in the planting frame, and the planting bed fixing rods are located in the space area surrounded by the buoyant float layer, the submerged plant planting bed is connected to the planting bed fixing rods by a connecting rope, submerged plants are planted on the submerged plant planting bed, the lower part of the submerged plant planting bed is connected to a first anchor body, the upper part of the fishing net is fixedly connected to the buoyant float layer and / or the planting frame, and the submerged plant planting bed is contained in the fishing net, and the lower part of the fishing net is connected to a second anchor body. The planting bed of the planting device is set in the middle of the buoyancy float layer. When submerged plants need to be observed, the experimenter needs to work on the buoyancy float layer or set up a lifting device. Therefore, the planting device requires a higher cost and a more complicated setting to ensure its stability to meet the needs of frequent observation. Summary of the Invention

[0004] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide a device for in-situ planting and observing submerged plants, which is used to solve the problem that the existing devices for planting submerged plants require a complex structure and a high manufacturing cost in order to frequently observe submerged plants.

[0005] The technical solution adopted by the present invention is a device for in-situ planting and observing submerged plants, including an above-water device, an underwater device and a fixed rod, the above-water device is connected to the fixed rod and can move up and down along the fixed rod, and the underwater device is arranged below the above-water device; the above-water device includes a floating bed and a skeleton arranged on the floating bed, characterized in that the skeleton includes a first frame and a second frame, the first frame is arranged above the second frame, and a plurality of support rods are also arranged between the first frame and the second frame, one end of the support rod is fixed to the first frame, and the other end is fixed to the second frame.

[0006] When the device for in-situ planting and observing submerged plants is in use, one end of the fixing rod is inserted into the riverbed at the bottom of the water, and the other end is exposed to the water surface. The above-water device is connected to the fixing rod, thereby fixing the above-water device and preventing it from moving in the horizontal direction. The above-water device floats on the water surface and can rise and fall with the rise and fall of the water level. The underwater device is used to plant submerged plants. It is arranged below the above-water device and sinks into the water. It can rise and fall with the rise and fall of the above-water device, so that it can always maintain a certain distance from the water surface. The above-water device includes a floating bed and a skeleton arranged on the floating bed. The floating bed is composed of a foam column wrapped with textile fabric. The foam has a certain buoyancy, so that the above-water device always floats on the water surface. Wrapping it with textile fabric can prevent the foam from breaking and being damaged after being subjected to force. The skeleton is used to fix the floating bed, prevent the floating bed from being deformed and moved due to wind and waves, and connect the underwater device. The frame is typically made of metal, with underwater devices suspended beneath it. Therefore, it is less affected by wind and waves, whereas the floating bed is more affected by them. Over time, the floating bed and frame can loosen or detach, affecting the structural stability of the planting device. The frame of this device for in-situ planting and observing submerged plants consists of a first frame, a second frame, and multiple support rods. Compared to a single-frame frame, it offers a more stable structure, providing a closer and more secure connection to the floating bed. This prevents the floating bed from being continuously affected by wind and waves, which could cause excessive displacement and deformation, which could affect its structural stability.

[0007] Furthermore, the floating bed is a quadrilateral floating structure that can expand outward and is surrounded by multiple floating columns. The floating column has an upper side, a lower side, an inner side and an outer side. The inner side is arc-shaped, and the distance between the upper side and the lower side is the thickness of the floating column; the first frame and the second frame are rigid quadrilateral structures, both of which are arranged on the inner side of the floating column, and the first frame is located on the upper side of the floating column, and the second frame is located on the lower side of the floating column.

[0008] The floating bed is a quadrilateral structure formed by a number of buoys, and its four corners are connected to fixed rods to prevent the horizontal movement of the floating bed. However, since the buoys have a certain length, about 5 meters, although their two ends are fixed, the middle part will bend or deform under the action of wind and waves. The first frame and the second frame are both made of metal materials, which have a certain strength and rigidity, and can fix the floating bed to prevent it from bending or deforming. The quadrilateral structure has strong stability and wind and wave resistance, high space utilization, and convenient construction and maintenance. The first frame and the second frame are arranged on the inner side of the floating bed because less material can be used on the inner side compared to the outer side of the buoy. While saving material, it can also reduce the weight of the skeleton. After installation, the first frame is located on the upper side of the buoy, and the second frame is located on the lower side of the buoy. The first frame and the second frame form a snap-fitting effect on the buoy, thereby fixing it.

[0009] Furthermore, the angle α between the horizontal plane and the line connecting the edge of the first frame and the central axis of the floating column is greater than the angle α1 between the horizontal plane and the line connecting the edge of the second frame and the center point of the floating column, wherein the angle α is 40-50 degrees, the angle α1 is 30-45 degrees, and the ratio of the vertical distance L between the first frame and the second frame to the thickness H of the floating column is 0.70-0.90.

[0010] The first and second frames are relatively thin relative to the buoys. If the distance between the first and second frames is too small, they will not be able to form a locking engagement with the buoys, and may slide downward when subjected to the tension of the underwater device. The angle α between the line connecting the edge of the first frame and the central axis of the buoy and the horizontal plane is larger than the angle α1 between the line connecting the edge of the second frame and the center point of the buoy and the horizontal plane, making the area of ​​the second frame smaller than the area of ​​the first frame. This facilitates construction. The fabricated frame is placed on the floating bed and can be installed on the bed under the action of gravity or by applying downward pressure. The angle α is set to 40-50 degrees to ensure that the second frame is located on the upper side of the buoy, providing some support. The angle α1 is set to 30-45 degrees to ensure that the second frame is above the water surface, facilitating the connection of the underwater device.

[0011] Furthermore, the support rod is arc-shaped, and its curvature matches the inner surface of the floating column. The support rod arranged on the edge of the quadrilateral protrudes toward the opposite side, and the support rod arranged at the corner protrudes toward the diagonal. The ratio of the area S1 enclosed by the first frame, the area S2 enclosed by the second frame, and the area S3 enclosed by the inner surface of the floating bed is 1:0.98~0.96:0.95~0.90.

[0012] The support rods are arc-shaped, forming a concave groove with the first and second frames to allow the float column to engage within the groove. The arc matches the inner surface of the float column, ensuring closer contact between the float column, the first and second frames, and the support rods, resulting in a more secure connection. The ratio of the area S1 enclosed by the first frame, the area S2 enclosed by the second frame, and the area S3 enclosed by the inner surface of the floating bed is set to 1:0.98-0.96:0.95-0.90. The inner surface of the floating bed is arc-shaped, and the first and second frames are located on the upper and lower sides of the float column, respectively. Therefore, the areas of the first and second frames are both larger than the areas enclosed by the inner surface of the floating bed. To ensure a better fit between the first and second frames and the floating bed, the difference between the area S1 enclosed by the first frame, the area S2 enclosed by the second frame, and the area S3 enclosed by the inner surface of the floating bed should not be too large.

[0013] Furthermore, a plurality of limit rods are provided on the first frame, wherein the limit rods are provided above the floating column, one end of which is fixed to the first frame, and the other end extends to the outer side surface of the floating column and forms a downward curved hook; the fixing rods are provided at the corners of the first frame, and are respectively connected to the limit rods on the two adjacent sides through fixing ropes, and the fixing ropes are flexible ropes.

[0014] The floating bed is tied to the frame with a nylon rope. With the continuous influence of wind and waves, the nylon rope may loosen, making the floating bed and the frame not firmly fixed. A limit rod is set on the first frame, and the limit rod can be used to firmly fix the floating bed to the frame to prevent it from being too far away from the frame. In addition, the limit rod is set above the float column, which can also prevent the first frame and the second frame from sliding down. The fixing rods are set at the four corners to fix the water device and prevent it from moving horizontally. Connecting the fixing rods to the limit rods on the two adjacent sides to form a plane can better fix the water device. The fixing rope is set as a flexible rope so that the water device can rise and fall with the rise and fall of the water level. Compared with setting a ring on the fixing rod and then connecting the water device to the ring so that the water device can rise and fall with the water level, using a flexible rope is simpler and more secure, and is not easy to be damaged or stuck.

[0015] Furthermore, fixing rods are also provided in the middle of the four sides of the first frame, and the fixing rods are connected to two adjacent limiting rods on the sides through fixing ropes.

[0016] This planting device is used in shallow lakes or rivers, where waves are not strong but there may be currents. Fixing rods are also provided in the middle of the four sides of the first frame, and two adjacent limiting rods on the same side are connected by fixing ropes, which can further stabilize the device on the water. At the same time, it can also prevent the floating column from moving inward.

[0017] Furthermore, crisscrossing pull ropes are arranged between the second frames, and the pull ropes are flexible ropes that are evenly distributed to form a mesh structure.

[0018] The buoys move and expand outward when affected by wind, waves, and currents. A crisscrossing network of pull ropes between the second frames acts as a tensile force, preventing the floating bed from expanding outward. When observing submerged plants, a small boat is needed to approach the aquatic installation, inevitably causing contact with the floating bed. Flexible pull ropes act as impact resistance, preventing damage to the floating bed caused by the boat's impact.

[0019] Furthermore, the unit grid area of ​​the mesh structure is 1.5~3.5m 2 The difference between the area of ​​the largest unit grid and the smallest unit grid is no more than 0.2m 2 , and a first float is provided at the intersection of the pull ropes.

[0020] Some submerged plants may have vines. The pull rope allows these vines to climb, exerting downward force on the rope. A first buoyant ball attached to the rope can leverage its buoyancy to exert an upward force on the rope. Vines climbing on the rope may block sunlight. Therefore, the grid cells should be evenly spaced to avoid small cells that could block sunlight and affect the growth of submerged plants.

[0021] Furthermore, the underwater device includes nutrient soil and a planting barrel for containing the nutrient soil. The planting barrel is connected to the second frame by a connecting rope. The connecting rope is a flexible rope, and a plurality of second floats are arranged on the second frame. The nutrient soil includes bottom mud at the bottom of the planting barrel, fine sand above the bottom mud, and coarse gravel above the fine sand.

[0022] An underwater device for growing submerged plants includes nutrient soil for the plants and a planting bucket to hold the soil. The planting bucket is connected to a second frame via a connecting rope, which can be adjusted to raise or lower the underwater device. To observe the plants, a small boat can be brought close to the floating bed. From outside the bed, the connecting rope can be retracted to lift the planting bucket out of the water. Compared to placing the underwater device in the center of the floating bed, this eliminates the need for complex equipment for standing or walking. However, lifting devices are easily damaged and require frequent maintenance, making them less practical. Using a flexible connecting rope to raise and lower the underwater device is simpler and more convenient. Placing the underwater device on the second frame lowers the overall stress point of the above-water device, making the structure more stable. By placing a second buoy on the second frame, the buoyancy of the second buoy creates an upward pull on the second frame. This, combined with the floating bed, counteracts the downward pull exerted by the underwater device and the weight of the frame structure, keeping it above the water surface.

[0023] Bottom mud, rich in organic matter, minerals, and microorganisms, is the primary source of nutrition for submerged plants. The soft mud layer also facilitates the downward extension of their roots and the absorption of nutrients. Fine sand, with its dense grains, stabilizes plant roots, preventing them from floating due to currents or biological activity. Furthermore, fine sand acts as a barrier, preventing organic particles from the bottom mud from entering the water, maintaining water clarity. The heavier coarse gravel further prevents the bottom mud and fine sand from being disturbed by currents or fish. It also adds weight to the planter, preventing it from tipping or overturning due to wind and waves.

[0024] Furthermore, the planting barrels are arranged at the connection between the pull rope and the second frame, the distance between two adjacent planting barrels is 1.2~2.3m, and the weight difference between the planting barrels on the opposite sides does not exceed 20%.

[0025] The pull cords are evenly distributed within the second frame, and the planter buckets are positioned at the junction of the pull cords and the second frame for easy positioning. The planter buckets are evenly distributed on the second frame, with the planter buckets on opposite sides positioned symmetrically. Furthermore, the planter buckets' proximity to the pull cords facilitates climbing vines. Climbing vines can partially block sunlight, so adjacent planter buckets should be spaced a certain distance apart to allow sunlight to reach the submerged buckets. The weight of the planter buckets on opposite sides should not differ significantly to ensure a balanced planting system.

[0026] Compared to the prior art, the present invention offers the following advantages: the double-layered frame structure increases its strength while also providing a more secure connection to the floating bed. The frame comprises a first frame, a second frame, and support rods. The support rods are curved, their curvature matching the inner surfaces of the buoyant columns, forming a concave groove with the first and second frames. The first frame has a larger area than the second frame, while the area enclosed by the inner surfaces of the floating bed is smaller than that of the second frame. During installation, the frame is simply placed on the floating bed and secured to the bed under its own weight or by downward pressure. After installation, the first frame is positioned on the upper side of the buoyant columns, while the second frame is positioned on the lower side of the columns. Together with the support rods, they engage the floating bed, securing the frame to the structure. The floating bed also provides a certain degree of support for the first frame, preventing the frame from sliding downward under load. Furthermore, a stopper rod is provided on the first frame to prevent the frame from sliding downward, while a downwardly curved hook on the stopper rod prevents the buoyant columns from expanding outward and separating from the frame. The second frame is positioned below the first frame, allowing the underwater device to be mounted on it. This lowers the stress point of the above-water device, making the structure more stable. When observing submerged plants, a small boat can be used to approach the floating bed and operate from outside the bed, eliminating the need to stand or walk on the bed, which would require complex equipment to ensure stability and safety. Multiple second buoys installed on the second frame leverage their buoyancy to create an upward pull on the second frame. These buoys, acting in conjunction with the floating bed, offset the pull of the underwater device and the weight of the frame, allowing the second frame to remain above water and facilitate operation of the underwater device. Both the frame and the floating bed are quadrilateral structures. While the four corners are relatively stable, the middle portions of the four sides, being farther from the corners, can still deform or move. Multiple crisscrossing tie ropes are evenly spaced between opposite sides of the second frame to prevent the bed from expanding outward and also provide a climbing surface for vines of certain submerged plants. First buoys are placed at the intersections of the tie ropes, leveraging their buoyancy to prevent the tie ropes from being pulled into the water. When a boat approaches a floating bed, it inevitably comes into contact with it, potentially impacting it. Therefore, flexible ropes are required for the pull ropes to prevent damage to the floating bed. The underwater system, used to cultivate submerged plants, includes nutrient soil for the plants and a planting bucket to hold the soil. The nutrient soil consists of bottom mud, fine sand above the mud, and coarse gravel above the fine sand. The bottom mud is the primary source of nutrients for submerged plants, and the soft mud layer also facilitates the downward extension of the plant's roots to absorb nutrients. The fine sand stabilizes the plant's roots, preventing them from floating upward due to currents or biological activity. It also blocks organic particles from the bottom mud from entering the water, maintaining water clarity. The coarse gravel, on the other hand, is heavier, further preventing the mud and fine sand from being disturbed by currents or fish. It also adds weight to the planting bucket, preventing it from tilting or overturning due to wind and waves.The planting bucket is connected to the second frame via a connecting rope. The underwater device can be raised or lowered by adjusting the length of the connecting rope. When it is necessary to observe plants, the planting bucket can be lifted out of the water by retracting the connecting rope. This device has a simple structure and is easy to operate. The device has a simple structure, low manufacturing cost, strong practicality, and is easy to manufacture. It can be mass-produced to meet experimental needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the present invention.

[0028] Figure 2 It is a structural diagram of the water device of the present invention.

[0029] Figure 3 Schematic diagram of the floating column of the present invention.

[0030] Figure 4 It is a structural diagram of the skeleton and underwater device of the present invention.

[0031] Figure 5 It is a side view of the skeleton of the present invention.

[0032] Figure 6 Schematic diagram of the first frame and the second frame.

[0033] Figure 7 This is a schematic diagram of the area enclosed by the inner side of the floating bed. DETAILED DESCRIPTION

[0034] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting the present invention. To better illustrate the following embodiments, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will appreciate that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0035] like Figure 1 As shown, a device for in-situ planting and observation of submerged plants includes an above-water device 1, an underwater device 2 and a fixed rod 3. The above-water device 1 is connected to the fixed rod 3 and can move up and down along the fixed rod 3. The underwater device 2 is arranged below the above-water device 1; the above-water device 1 includes a floating bed 4 and a skeleton 5 connected to the floating bed 4, the skeleton 5 includes a first frame 51 and a second frame 52, the first frame 51 is arranged above the second frame 52, and a plurality of support rods 53 are also arranged between the first frame 51 and the second frame 52, one end of the support rod 53 is connected to the first frame 51, and the other end is connected to the second frame 52.

[0036] Specifically, such as Figures 1 to 3As shown, the floating bed 4 is a quadrilateral structure formed by a plurality of floats 41, which floats on the water surface. The floats 41 are foam columns wrapped with woven fabric, and the cross section can be circular, elliptical or other shapes. It has an upper side, a lower side, an inner side and an outer side. The lower side is in contact with the water surface, and the distance between the upper side and the lower side is the thickness D of the float.

[0037] like Figures 4 to 7 As shown, the first frame 51 and the second frame 52 are both quadrilateral structures made of steel pipes. The first frame 51 is positioned above the second frame 52. Multiple support rods 53 are positioned between the first and second frames 51, 52. Adjacent support rods 53 are spaced a certain distance L1 apart, preferably 0.8 to 1.2 meters. Furthermore, the support rods 53 are arc-shaped, with the same curvature as the inner surface of the buoy 41. The support rods 53 positioned on the four sides of the quadrilateral protrude toward the opposite sides, while the support rods 53 positioned at the four corners protrude diagonally. Together with the first and second frames 51, 52, the support rods 53 form an inwardly concave groove. The buoy 41 is positioned outside the first and second frames 51, 52, with its inner surface positioned within the groove formed by the first, second, and support rods 53. The buoy 41 is secured to the first and second frames 51, 52 via nylon ropes 42.

[0038] like Figure 6 、 Figure 7 As shown, the area S1 formed by the first frame is larger than the area S2 formed by the second frame, and larger than the area S3 formed by the inner side of the floating bed. Preferably, the ratio of S1 to S2 and S3 is 1:0.98~0.96:0.95~0.90. During installation, the skeleton 5 is placed on the floating bed 4. Under the action of gravity or by applying downward pressure, the skeleton 5 can be installed on the floating bed 4. The groove formed by the skeleton engages with the floating column 41. After engagement, the skeleton 5 is firmly tied to the floating bed 4 using nylon rope. Figure 3 As shown, after installation, the first frame 51 is located on the upper side of the floating column 41, and the second frame 52 is located on the lower side of the floating column 41. The angle α between the line connecting the edge of the first frame 51 and the central axis of the floating column 41 is greater than the angle α1 between the line connecting the edge of the second frame 52 and the center point of the floating column 41 and the horizontal plane. Preferably, the angle α is 40-50 degrees, and the angle α1 is 30-45 degrees. A certain distance L is separated from the first frame 51 and the second frame 52. The ratio of this distance L to the thickness D of the floating column 4 is 0.7-0.9.

[0039] like Figure 1 、 Figure 4As shown, to further securely fasten the floating bed 4 to the frame 5, a plurality of limiting rods 54 are provided on the first frame 51. These limiting rods 54 are positioned above the upper side of the buoyant columns 41 and are shaped to match the upper side of the buoyant columns 41. These limiting rods 54 prevent the frame 5 from sliding downward. One end of the limiting rod 54 is fixed to the first frame 51, while the other end extends to the outer side of the buoyant columns 41, forming a downwardly curved hook that prevents the buoyant columns 41 from separating from the frame 5.

[0040] like Figure 1 As shown, a fixing rod 3 is provided at each of the four corners of the aquatic device 1. One end of the fixing rod 3 is inserted into the riverbed at the bottom of the water, while the other end is exposed above the water surface. The fixing rod 3 is connected to the aquatic device 1 via a fixing rope 31, thereby preventing the aquatic device 1 from moving horizontally. Specifically, two fixing ropes 31 are provided on each fixing rod 3. The other ends of the two fixing ropes 31 are respectively connected to the limiting rods 54 on the two sides forming the corner, thereby forming a plane and making the aquatic device 1 more firmly fixed. The fixing rope 31 is a flexible rope with a certain length, so that the aquatic device 1 can be raised and lowered according to the rise and fall of the water level. Of course, depending on the use environment, the fixing rod 3 can also be provided in the middle of the four sides of the aquatic device 1. In this case, the other ends of the two fixing ropes 31 are respectively connected to two adjacent limiting rods 54 on the same side.

[0041] like Figure 4 As shown, a plurality of second floats 521 are provided on the second frame 52, and a circular hole is opened on the second float 521, so that the second float 521 can be mounted on the second frame 52. There are also a plurality of crisscrossing pull ropes 522 evenly distributed between the opposite sides of the second frame 52, thereby forming a mesh structure. The pull ropes 522 are flexible ropes, and their two ends are respectively connected to the opposite sides of the second frame 52, and a plurality of first floats 523 are also mounted on the intersection points of the pull ropes 522. Because some submerged plants have vines that grow and climb on the pull ropes 522, blocking the sunlight, the unit grid area cannot be too small to allow sunlight to pass through. Preferably, the unit grid area S4 is 1.5~3.5m 2 , and the area difference between the largest unit grid and the smallest unit grid is no more than 0.2m 2 .

[0042] like Figure 1 、 Figure 4As shown, the underwater device 2 includes nutrient soil 21 for growing submerged plants and a planting bucket 22 for containing the nutrient soil 21. The planting bucket 22 is suspended below the second frame 52 by a connecting rope 23. Specifically, the connecting rope 23 is a flexible rope, positioned at the junction of the second frame 52 and the pull rope 522, ensuring that the planting bucket 22 is as close as possible to the pull rope 522. The distance L2 between adjacent planting buckets is 1.2 to 2.3 meters. The connecting rope 23 includes a first connecting rope 231 and multiple second connecting ropes 232. One end of the first connecting rope 231 is connected to the second frame 52, and the other end is connected to the multiple second connecting ropes 232. The upper sidewall of the planting bucket 22 is uniformly defined with multiple connecting holes, preferably 3 to 4. The other ends of the multiple second connecting ropes 232 pass through the connecting holes and connect to the planting bucket. The multiple second connecting ropes 232 are of the same length. The lengths of the first connecting rope 231 and the second connecting rope 232 are adjustable, allowing users to select the appropriate length based on their needs. When it is necessary to observe the submerged plants, the planting barrel 22 can be lifted out by retracting the connecting rope 23 .

[0043] The nutrient soil 21 includes bottom mud 211 arranged at the bottom of the planting barrel 22, fine sand 212 above the bottom mud 211, and gravel 213 above the fine sand 212. The bottom mud 211 provides a source of nutrition for submerged plants, and also facilitates the roots of submerged plants to extend downward and absorb nutrients. The fine sand 212 can stabilize the root system of plants, prevent the plants from floating up due to water flow or biological activities, and block the organic particles in the bottom mud from entering the water body, keeping the water quality clear. The gravel 213 is heavier, which can further prevent the bottom mud and fine sand from being disturbed by water flow or fish. At the same time, it can also increase the weight of the planting barrel 22 to prevent it from tilting or overturning under the action of wind and waves. The weight of different planting barrels 22 should be the same or similar, and the weight difference between the planting barrels 22 on both sides should not exceed 20% to ensure the balance of the planting device.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A device for in-situ planting and observation of submerged plants, comprising an above-water device, an underwater device, and a fixed rod, wherein the above-water device is connected to the fixed rod and can move up and down along the fixed rod, and the underwater device is arranged below the above-water device; the above-water device comprises a floating bed and a frame arranged on the floating bed, characterized in that: The skeleton includes a first frame and a second frame, the first frame is arranged above the second frame, and a plurality of support rods are further arranged between the first frame and the second frame, one end of the support rod is fixed to the first frame, and the other end is fixed to the second frame; The floating bed is a quadrilateral floating structure enclosed by a plurality of floating columns that can expand outward. The floating columns have an upper side, a lower side, an inner side, and an outer side. The inner side is arc-shaped, and the distance between the upper side and the lower side is the thickness of the floating column. The first frame and the second frame are rigid quadrilateral structures, both of which are arranged on the inner side of the floating column, with the first frame located on the upper side of the floating column and the second frame located on the lower side of the floating column. The angle α between the line connecting the edge of the first frame and the central axis of the floating column in which it is located and the horizontal plane is greater than the angle α1 between the line connecting the edge of the second frame and the central point of the floating column in which it is located and the horizontal plane, wherein the angle α is 40-50 degrees and the angle α1 is 30-45 degrees, and the ratio of the vertical distance L between the first frame and the second frame to the thickness H of the floating column is 0.70-0.90; The support rods are arc-shaped, and their curvature matches the inner surface of the floating column. The support rods arranged on the sides of the quadrilateral protrude toward the opposite sides, and the support rods arranged at the corners protrude toward the diagonal sides. The ratio of the area S1 enclosed by the first frame to the area S2 enclosed by the second frame to the area S3 enclosed by the inner surface of the floating bed is 1:0.98~0.96:0.95~0.90; The first frame is provided with a plurality of limit rods, each of which is arranged above the floating column, with one end fixed to the first frame and the other end extending to the outer side of the floating column and forming a downward curved hook; the fixing rod is arranged at the corner of the first frame and is connected to the limit rods on the two adjacent sides by fixing ropes, and the fixing ropes are flexible ropes; A fixing rod is also provided in the middle of the four sides of the first frame, and the fixing rod is connected to two adjacent limiting rods on the side through a fixing rope.

2. The device for in-situ planting and observing submerged plants according to claim 1, characterized in that: Drawstrings that are crisscrossed are arranged between the second frames. The drawstrings are flexible ropes that are evenly distributed to form a mesh structure.

3. The device for in-situ planting and observing submerged plants according to claim 2, characterized in that: The unit grid area of ​​the mesh structure is 1.5~3.5m 2 The difference between the area of ​​the largest grid and the smallest grid is no more than 0.2m 2 , and a first float is provided at the intersection of the pull ropes.

4. The device for in-situ planting and observing submerged plants according to claim 3, characterized in that: The underwater device includes nutrient soil and a planting bucket containing the nutrient soil. The planting bucket is connected to the second frame through a connecting rope, and a plurality of second floats are provided on the second frame. The nutrient soil includes bottom mud at the bottom of the planting bucket, fine sand above the bottom mud, and coarse gravel above the fine sand.

5. The device for in-situ planting and observing submerged plants according to claim 4, characterized in that: The planting barrels are arranged at the connection between the pull rope and the second frame. The distance between two adjacent planting barrels is 1.2~2.3m, and the weight difference between the planting barrels on the two sides does not exceed 20%.

Images