A water surface duckweed removing device for aquaculture

Abstract

The utility model relates to the technical field of water surface duckweed removal, and disclose a water surface duckweed removal device for aquaculture, including floating raft, the top of floating raft is rotatably connected with rotating base through rotating device, the top of rotating base is provided with power mechanism for driving floating raft to float, the left -hand member fixedly connected with four extension bars of floating raft, the rotatable mechanism is arranged between the front and rear two extension bars, the inside of floating raft is provided with through slot, the rotatable mechanism drives duckweed into the through slot, the inside of through slot is provided with the collection mechanism for collecting duckweed, the top of floating raft is provided with the drive mechanism for driving rotatable mechanism and collection mechanism, the utility model discloses through setting, power mechanism, rotatable mechanism and collection mechanism, gather in one, salvage, collect, realized continuous automation operation, greatly improved cleaning efficiency, saved a large number of manpower and time cost, especially suitable for large area aquaculture water area.

Description

Technical Field

[0001] This utility model relates to the field of water surface de-duckling technology, specifically a water surface de-duckling device for aquaculture. Background Technology

[0002] In aquaculture, duckweed on the water surface has always been a significant factor affecting aquaculture efficiency and the ecological environment. When duckweed proliferates in large quantities on the water surface, it covers a large area of ​​water, forming a dense covering layer.

[0003] From an aquaculture efficiency perspective, duckweed covering the water surface blocks sunlight from penetrating the water, affecting the photosynthesis of algae and thus reducing dissolved oxygen levels. Dissolved oxygen is a critical factor for the survival of aquatic animals; insufficient dissolved oxygen leads to slow growth, decreased appetite, and even large-scale mortality, causing significant economic losses for farmers. Furthermore, duckweed competes with cultivated aquatic plants for nutrients and living space, inhibiting their growth and disrupting the ecological balance of the aquaculture area.

[0004] From an ecological and environmental perspective, excessive proliferation of duckweed can alter the physicochemical properties of water bodies, leading to factors such as increased water temperature and deterioration of water quality, thus affecting the stability of the entire aquatic ecosystem. Furthermore, the decomposition of dead duckweed consumes dissolved oxygen in the water, further exacerbating oxygen deficiency and releasing harmful substances that pollute the aquatic environment.

[0005] Currently, the removal of duckweed from water surfaces mainly relies on manual harvesting. Manual harvesting is not only labor-intensive and inefficient, but also requires a significant investment of manpower and time. Especially in large-scale aquaculture areas, manual harvesting is insufficient to meet the need for timely duckweed removal, and the duckweed often continues to multiply and spread during the harvesting process. Therefore, developing an efficient and automated duckweed removal device for aquaculture is of significant practical importance. Utility Model Content

[0006] (a) Technical problems to be solved The purpose of this invention is to solve the problem that the removal of duckweed on the water surface mainly relies on manual dredging, which is not only labor-intensive and inefficient, but also requires a large investment of manpower and time. Therefore, this invention proposes a duckweed removal device for aquaculture.

[0007] (II) Technical Solution The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A device for removing duckweed from aquaculture water surfaces includes a raft. The top of the raft is rotatably connected to a rotating base via a rotating device. The top of the rotating base is equipped with a power mechanism for driving the raft to float. Four extension rods are fixedly connected to the left end of the raft. A rotating mechanism is provided between two adjacent extension rods. A through groove is opened on the inner side of the raft. The rotating mechanism drives the duckweed into the through groove. A collection mechanism for collecting the duckweed is provided on the inner side of the through groove. A drive mechanism for driving the rotating mechanism and the collection mechanism is provided at the top of the raft.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Preferably, the power mechanism includes a mounting base, the top of the rotating base is fixedly connected to the mounting base, the top of the mounting base is fixedly connected to a power motor, the right end of the mounting base is rotatably connected to a power shaft, the output end of the power motor is connected to the power shaft through a first transmission mechanism, and a power propeller is fixedly connected to the outside of the power shaft.

[0010] Preferably, the rotating mechanism includes a rotating shaft, which is rotatably connected between two adjacent extension rods at the front and rear. Eight fixed rods are fixedly connected to the outside of the rotating shaft, and vertical plates are fixedly connected between two adjacent fixed rods at the top and bottom. Several filter holes are provided on the vertical plates.

[0011] Preferably, the collection mechanism includes a collection shaft, two collection shafts are rotatably connected to the inner side of the raft, two sprockets are fixedly connected to the outer side of each of the two collection shafts, the left and right sprockets are connected by a chain plate, the chain plate meshes with the outer side of the sprocket, the two chain plates are fixedly connected, and a protruding plate is fixedly connected to the chain plate. A collection box is placed inside the raft, and the collection box is located below the collection shaft on the right side.

[0012] Preferably, the top end of the protruding plate is provided with a bent portion.

[0013] Preferably, the driving mechanism includes a drive motor, the top of the raft is fixedly connected to the drive motor, the output end of the drive motor is connected to the collection shaft on the right side through a second transmission mechanism, the top of the raft is rotatably connected to a first transmission shaft, the output end of the drive motor is connected to the first transmission shaft through another second transmission mechanism, the tops of the two upper extension rods are each provided with a steering mechanism, a second transmission shaft is provided between the two steering mechanisms, and the second transmission shaft is connected to the first transmission shaft through yet another second transmission mechanism.

[0014] (III) Beneficial Effects Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This utility model integrates gathering, retrieval, and collection into one unit through the setting, power mechanism, rotation mechanism, and collection mechanism, realizing continuous automated operation, greatly improving cleaning efficiency, saving a lot of manpower and time costs, and is especially suitable for large-area aquaculture waters. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the power mechanism structure of this utility model; Figure 3 This is a schematic diagram of the rotating mechanism of this utility model; Figure 4 This is a schematic diagram of the collection mechanism structure of this utility model; Figure 5 This is a schematic diagram of the drive mechanism structure of this utility model.

[0016] In the diagram: 1. Floating raft; 2. Rotating base; 3. Power mechanism; 31. Mounting base; 32. Power motor; 33. Power shaft; 34. First transmission mechanism; 35. Power propeller; 4. Extension rod; 5. Rotating mechanism; 51. Rotating shaft; 52. Fixing rod; 53. Vertical plate; 54. Filter hole; 6. Through groove; 7. Collection mechanism; 71. Collection shaft; 72. Sprocket; 73. Chain plate; 74. Protruding plate; 75. Collection box; 8. Drive mechanism; 81. Drive motor; 82. Second transmission mechanism; 83. First transmission shaft; 84. Steering mechanism; 85. Second transmission shaft. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the embodiments, by Figure 1-5 A device for removing duckweed from aquatic surfaces in aquaculture is provided, comprising a raft 1, a rotating base 2 rotatably connected to the top of the raft 1 via a rotating device, a power mechanism 3 for driving the raft 1 to float at the top of the rotating base 2, four extension rods 4 fixedly connected to the left end of the raft 1, a rotating mechanism 5 between two adjacent extension rods 4, a through groove 6 opened on the inner side of the raft 1, the rotating mechanism 5 driving duckweed into the through groove 6, a collection mechanism 7 for collecting duckweed on the inner side of the through groove 6, and a drive mechanism 8 for driving the rotating mechanism 5 and the collection mechanism 7 at the top of the raft 1.

[0019] With the above setup, the device provides thrust through the power mechanism 3, driving the entire raft 1 to move on the water surface. The rotating base 2, via a rotating device (located inside the raft 1 and driven by a motor), allows the power mechanism 3 to adjust its direction, enabling flexible forward, backward, and turning movements, allowing the device to effectively cover the areas requiring cleaning. The extension rod 4 extending from the left end of the raft 1 acts as a "flare," widening the width of a single operation and guiding a larger area of ​​duckweed to the center of the device. The rotating mechanism 5, located between the extension rods 4, begins operation under the drive of the drive mechanism 8. Its rotation direction is designed to continuously push the duckweed in front towards the central channel 6 of the raft 1, effectively preventing duckweed from slipping away from the sides and ensuring efficient collection. The duckweed collected in the channel 6 is captured by the collection mechanism 7 located within the channel 6. The collection mechanism 7, also driven by the drive mechanism 8, scoops the duckweed from the water surface and transports it along the channel 6 to one side, ultimately collecting the duckweed. Throughout the process, the power mechanism 3 ensures the device continues to move forward, while the rotating mechanism 5 and the collection mechanism 7 work together to continuously collect, dredge, and store duckweed until the collection container is full or the water area is cleaned up. Integrating collection, dredging, and harvesting into one system, this system achieves continuous automated operation, greatly improving cleaning efficiency and saving significant manpower and time costs. It is particularly suitable for large-scale aquaculture areas.

[0020] Reference Figure 1-5 The power mechanism 3 includes a mounting base 31. The top of the rotating base 2 is fixedly connected to the mounting base 31. The top of the mounting base 31 is fixedly connected to the power motor 32. The right end of the mounting base 31 is rotatably connected to the power shaft 33. The output end of the power motor 32 is connected to the power shaft 33 through a first transmission mechanism 34. The outside of the power shaft 33 is fixedly connected to the power propeller 35. With the above-described structure, the operator starts the power motor 32. The power motor is the power source for the entire device. The output shaft of the power motor 32 begins to rotate. This rotational power is transmitted to the connected power shaft 33 via the first transmission mechanism 34 (which can be belt drive, gear drive, or chain drive). The power shaft 33 begins to rotate under the drive of the transmission mechanism. The propeller 35, fixedly connected to the outside of the power shaft 33, rotates at high speed in the water. The rotating propeller 35 blades propel the water flow, and according to the principle of action and reaction, the water gives the propeller blades a forward reaction force. This force is the thrust that propels the device forward. The thrust is transmitted to the mounting base 31 through the rotating power shaft 33. The mounting base 31 is fixedly mounted on the rotating base 2, and the rotating base 2 is connected to the raft 1 via a rotating device below. Therefore, the final thrust is transmitted to the entire raft 1, overcoming water resistance and driving the raft 1 forward. The key lies in the design of the rotating base 2. By rotating the entire power mechanism 3, including the mounting base 31, motor 32, power shaft 33, and propeller 35, the thrust direction of the propeller 35 can be changed. When the thrust direction is aligned with the central axis of the raft 1, the device moves forward in a straight line. When the thrust direction is adjusted to have a certain angle with the central axis (e.g., to the left or right), a steering torque is generated, enabling the entire raft 1 to make flexible turns or curves, ensuring that the device can cover all corners of the water area.

[0021] Reference Figure 1-5 The rotating mechanism 5 includes a rotating shaft 51, which is rotatably connected between two adjacent extension rods 4. Eight fixed rods 52 are fixedly connected to the outside of the rotating shaft 51, and vertical plates 53 are fixedly connected between two adjacent fixed rods 52. Several filter holes 54 are opened on the vertical plates 53. With the above structural setup, the drive mechanism 8 transmits power to the rotating shaft 51 via a chain, gear, or other transmission method (not shown in the diagram), causing it to slowly rotate. The axis of rotation of the rotating shaft 51 is roughly parallel to the water surface, and its installation position ensures that its lower half is submerged in the water while its upper half is above the surface. Eight fixed rods 52, fixed to the rotating shaft 51, are arranged radially. They act as the main skeleton of the cage. The vertical plates 53 connecting the upper and lower fixed rods 52 form a continuous, large strip-shaped grid wall. When the rotating shaft 51 rotates, this grid wall composed of vertical plates 53 acts like a slowly moving "track" or "curtain." The most crucial feature of this design is the water filter holes 54 on the vertical plates 53. When the device moves forward under the drive of the power mechanism 3, the rotation direction of the rotating mechanism 5 is set to match the forward direction of the device. The water filter holes 54 allow water to flow smoothly through the moving vertical plates 53, greatly reducing water resistance and turbulence caused by rotation. Without these holes, the vertical plate 53 would violently paddle like a paddle, creating huge waves that would scatter the duckweed. Because the water can flow through, the vertical plate 53 acts as a "paddle" and "guide" rather than a "thrust" on the duckweed. It gently "catches" the duckweed in front and guides it smoothly along its direction of movement into the central channel 6 of the raft 1. The rotating mechanisms 5 on both sides rotate simultaneously inward and backward (relative to the direction of travel of the device). This forms a "V"-shaped collection channel. After the duckweed is gathered into a narrower area by the extension rod 4, it is immediately captured by these slowly rotating, perforated vertical plates 53 and continuously and smoothly transported to the entrance of the channel 6, awaiting retrieval by the collection mechanism 7.

[0022] Reference Figure 1-5 The collection mechanism 7 includes a collection shaft 71. Two collection shafts 71 are rotatably connected to the inner side of the raft 1. Two sprockets 72 are fixedly connected to the outer side of each of the two collection shafts 71. The left and right sprockets 72 are connected by a chain plate 73. The chain plate 73 meshes with the outer side of the sprocket 72. The two chain plates 73 are fixedly connected. A protruding plate 74 is fixedly connected to the chain plate 73. A collection box 75 is placed inside the raft 1. The collection box 75 is located below the right collection shaft 71. With the above-described structure, the drive mechanism 8 transmits power to the collection shaft 71 on the right, causing it to rotate. Since the sprocket 72 is fixedly mounted on the collection shaft 71, its rotation drives the chain plate 73, which meshes with it, to rotate. The chain plate 73's operating path is designed as follows: its lower half is below the water surface, moving from the side of the channel 6 closest to the rotating mechanism 5 to the right end. The protruding plates 74 fixedly mounted on the chain plate 73 move along with it. As the underwater portion of the chain plate 73 moves forward, these protruding plates 74 act like a series of small shovels, catching and scooping up the duckweed brought in by the rotating mechanism 5 from the entrance of the channel 6. Carrying the duckweed and water, the chain plate 73 continues its operation, turning from underwater to above water, moving upwards or backwards along the trajectory of the sprocket 72. This is a lifting process, raising the duckweed from the water surface into the air. When the chain plate 73 reaches the top (around the top collection shaft 71), it begins to rotate downwards. Due to gravity, the duckweed caught by the protruding plates 74 will automatically detach at this point. The collection box 75 is cleverly placed below the right-side collection shaft 71, precisely aligned with the unloading point. The detached duckweed falls accurately into the collection box 75. Simultaneously, during the lifting and unloading process, a large amount of water carried by the duckweed is filtered out through the gaps in the chain plate 73 and the gap between the raised plate 74, flowing back into the water, achieving preliminary solid-liquid separation and preventing the collection box 75 from becoming too heavy due to excessive water accumulation. After unloading, the chain plate 73 and the raised plate 74 become unloaded and continue moving downwards, returning to the water to begin the next retrieval cycle. As long as the drive mechanism 8 continues, this process of retrieval → lifting → unloading → returning will continue uninterrupted, thus achieving continuous automated collection of duckweed.

[0023] Reference Figure 1-5 The top of the protruding plate 74 is provided with a bent part; With the above structural design, when the flat scraper passes through the duckweed layer, the duckweed easily slips off the top of the plate due to water resistance and cannot be effectively caught. The addition of a backward bend creates an "L" or "J" shaped blocking structure. As the raised plate 74 moves forward underwater, this bend more reliably "hooks" or "scoops up" the duckweed, especially in thick, sticky duckweed layers, effectively preventing it from slipping off the top and ensuring that most of the contacted duckweed is successfully captured and lifted. At the inflection point where the chain plate 73 changes from horizontal to vertical lifting, the duckweed easily slips backward due to the change in center of gravity and gravity. The top bend forms the edge of a "container," better confining the duckweed within the raised plate 74 during lifting, significantly reducing backflow and scattering of duckweed in the initial lifting stage.

[0024] Reference Figure 1-5The drive mechanism 8 includes a drive motor 81. The top of the raft 1 is fixedly connected to the drive motor 81. The output end of the drive motor 81 is connected to the right collection shaft 71 through a second transmission mechanism 82. The top of the raft 1 is rotatably connected to a first transmission shaft 83. The output end of the drive motor 81 is connected to the first transmission shaft 83 through another second transmission mechanism 82. The tops of the two upper extension rods 4 are each provided with a steering mechanism 84. A second transmission shaft 85 is provided between the two steering mechanisms 84. The second transmission shaft 85 is connected to the first transmission shaft 83 through another second transmission mechanism 82. With the above structural configuration, the steering mechanism 84 converts the lateral rotation of the second drive shaft 85 into the vertical rotation of the two rotating shafts 51, thus starting the drive motor 81. The power output from the motor is directly transmitted to the right-side collection shaft 71 via a second transmission mechanism 82 (which can be a pulley set or a sprocket set). The right-side collection shaft 71 begins to rotate, driving the entire chain plate 73 and the raised plate 74 to circulate through the sprocket 72 on it, thereby initiating the work of retrieval and lifting duckweed. The power output from the drive motor 81 is simultaneously transmitted to the first drive shaft 83 located at the top of the raft 1 via another second transmission mechanism 82. The function of this shaft is to change the direction of power transmission, directing the power from the rear of the raft 1 where the motor is located to the front. The power is transmitted from the first drive shaft 83 and then through another second transmission mechanism 82 to the second drive shaft 85 located horizontally at the front of the device. The second drive shaft 85 spans the left end of the raft 1, with a steering mechanism 84 connected to each end, which can be a bevel gearbox or a 90-degree steering gear. When the second drive shaft 85 rotates, the power is converted from the rotation around the horizontal axis to the rotation around the vertical axis through the steering mechanisms 84 at both ends. Finally, this power is output to the rotating shaft 51 of the rotating mechanism 5, driving it to rotate, thereby driving the fixed rod 52 and the vertical plate 53 to rotate, completing the action of collecting duckweed.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for removing duckweed from the water surface in aquaculture, characterized in that, The floating raft (1) is rotatably connected to a rotating base (2) at its top via a rotating device. A power mechanism (3) for driving the floating raft (1) to float is provided at the top of the rotating base (2). Four extension rods (4) are fixedly connected to the left end of the floating raft (1). A rotating mechanism (5) is provided between two adjacent extension rods (4). A through groove (6) is provided on the inner side of the floating raft (1). The rotating mechanism (5) drives duckweed into the through groove (6). A collection mechanism (7) for collecting duckweed is provided on the inner side of the through groove (6). A driving mechanism (8) for driving the rotating mechanism (5) and the collection mechanism (7) is provided at the top of the floating raft (1).

2. The device for removing duckweed from the water surface in aquaculture according to claim 1, characterized in that: The power mechanism (3) includes a mounting base (31). The top end of the rotating base (2) is fixedly connected to the mounting base (31). The top end of the mounting base (31) is fixedly connected to a power motor (32). The right end of the mounting base (31) is rotatably connected to a power shaft (33). The output end of the power motor (32) is connected to the power shaft (33) through a first transmission mechanism (34). The outside of the power shaft (33) is fixedly connected to a power propeller (35).

3. The device for removing duckweed from the water surface in aquaculture according to claim 1, characterized in that: The rotating mechanism (5) includes a rotating shaft (51). The rotating shaft (51) is rotatably connected between the two adjacent extension rods (4) at the front and rear. Eight fixed rods (52) are fixedly connected to the outside of the rotating shaft (51). Vertical plates (53) are fixedly connected between the two adjacent fixed rods (52) at the top and bottom. Several filter holes (54) are opened on the vertical plates (53).

4. A device for removing duckweed from aquatic surfaces in aquaculture according to claim 3, characterized in that: The collection mechanism (7) includes a collection shaft (71). Two collection shafts (71) are rotatably connected to the inner side of the raft (1). Two sprockets (72) are fixedly connected to the outer side of each of the two collection shafts (71). The left and right sprockets (72) are connected by a chain plate (73). The chain plate (73) meshes with the outer side of the sprocket (72). The two chain plates (73) are fixedly connected. A protruding plate (74) is fixedly connected on the chain plate (73). A collection box (75) is placed inside the raft (1). The collection box (75) is located below the collection shaft (71) on the right side.

5. A device for removing duckweed from the water surface in aquaculture according to claim 4, characterized in that: The top of the protruding plate (74) is provided with a bent portion.

6. A device for removing duckweed from aquatic surfaces in aquaculture according to claim 4, characterized in that: The drive mechanism (8) includes a drive motor (81). The top of the raft (1) is fixedly connected to the drive motor (81). The output end of the drive motor (81) is connected to the collection shaft (71) on the right side through a second transmission mechanism (82). The top of the raft (1) is rotatably connected to a first transmission shaft (83). The output end of the drive motor (81) is connected to the first transmission shaft (83) through another second transmission mechanism (82). The tops of the two extension rods (4) above are each provided with a steering mechanism (84). A second transmission shaft (85) is provided between the two steering mechanisms (84). The second transmission shaft (85) is connected to the first transmission shaft (83) through yet another second transmission mechanism (82).

Images