A grazing type culture method for large reservoir filter-feeding fish

Abstract

This invention relates to the field of filter-feeding fish aquaculture technology, and discloses a grazing-style aquaculture method for filter-feeding fish in large reservoirs. The method includes an installation unit, a transmission unit, and a harvesting unit. The installation unit includes a fence body with a gate inside its cavity. A first harvesting fence body and a second harvesting fence body are respectively installed on either side of the gate within the fence body. The harvesting unit includes two U-shaped fixing plates. In this invention, when the slider within the electric sliding rail moves, it can also drive the fixing plates to move. The fixing plates allow the second gate and the first gate to open. Simultaneously, when the fixing plates move to a certain position, they can close the second gate and then the first gate, thus allowing filter-feeding fish to enter the first harvesting fence body. When it is necessary to harvest the filter-feeding fish, the operator can use a lifting device to lift the first harvesting fence body, thereby harvesting the filter-feeding fish.

Description

Technical Field

[0001] This invention belongs to the field of filter-feeding fish aquaculture technology, specifically, it relates to a grazing-style aquaculture method for filter-feeding fish in large reservoirs. Background Technology

[0002] With my country's increased emphasis on environmental protection and the protection of large water areas such as reservoirs and lakes, many reservoirs and lakes have removed aquaculture facilities such as cages and enclosures. Although cage and enclosure feeding aquaculture does not cause the severe eutrophication damage to water quality like traditional fertilization fish farming, this method still leads to a gradual decrease in water transparency and a trend towards eutrophication over time, meaning an increase in nutrients in the water. When eutrophication reaches a certain level, cyanobacterial pollution will occur. Furthermore, some water areas are also affected by industrial and agricultural activities and human life, making them more prone to evolving into algae-infested water bodies. Therefore, eutrophication of large areas of water is a serious problem that is difficult to manage. To ensure water quality, removing cages, enclosures, and other aquaculture facilities, thereby prohibiting artificial feeding, is the most direct means.

[0003] However, when existing fences are used to enclose filter-feeding fish, their swimming patterns are often unpredictable, which can easily disrupt the ecological balance of the area. Therefore, some existing fences are often divided into several foraging zones, allowing filter-feeding fish to enter each zone to forage. However, when fish move from one foraging zone to the next, the gates of both foraging zones need to be opened simultaneously. While this allows fish to enter different foraging zones, it makes catching filter-feeding fish more troublesome, requiring the use of other equipment to catch them individually or in groups, resulting in low fishing efficiency.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A grazing-style aquaculture method for filter-feeding fish in large reservoirs includes an installation unit, a transmission unit, and a fishing unit. The installation unit includes a fence body, and a gate is provided in the inner cavity of the fence body. A first fishing fence body and a second fishing fence body are respectively provided on both sides of the gate in the fence body. The fishing unit includes two U-shaped fixing plates, which are respectively disposed on the inner walls above the first fishing fence body and the second fishing fence body. The transmission unit includes two electric slide rails, which are respectively installed on opposite side walls of the fence body and are symmetrical to each other.

[0006] In a preferred embodiment of the present invention, a first mounting slot is provided at the bottom of the gate, and a rectangular slot is provided above the first mounting slot. The rectangular slot movably passes through the gate. Placement slots are provided on both sides of the rectangular slot. A second sliding slot is provided on the gate on the opposite sidewall of the two placement slots. The two second sliding slots are symmetrical to each other, and a moving slot is also provided on the gate on the opposite sidewall of the two second sliding slots. The two moving slots movably pass through the gate. A first sliding slot is provided on the gate at the opposite end of the two moving slots, and a positioning slot is provided on the gate at the opposite end of the two first sliding slots.

[0007] In a preferred embodiment of the present invention, the two electric slide rails are respectively movably inserted through the inner cavity of the movable slot, and a wedge plate is provided on the opposite side of the two movable slots. The two wedge plates are symmetrical to each other and are respectively movably disposed in the second sliding slot. A positioning block is fixedly connected to the opposite end of the two wedge plates.

[0008] In a preferred embodiment of the present invention, a fixing plate is slidably disposed above the two electric slide rails, and a fish-attracting plate is slidably disposed at the bottom of the two electric slide rails. The two fixing plates respectively movably pass through the first sliding groove and the positioning groove.

[0009] In a preferred embodiment of the present invention, the two wedge plates are respectively provided with sliding mechanisms on the opposite side walls of the inner cavity of the second sliding groove. The sliding mechanism includes four movable sliding grooves, which are respectively opened on the opposite side walls of the inner cavity of the two second sliding grooves. Each movable sliding groove is symmetrical to each other. A movable slider is slidably arranged in the inner cavity of each movable sliding groove. Each movable slider is symmetrical to each other and is arranged on the wedge plate in pairs. Each movable slider is provided with a return spring, and the other end of the return spring is arranged on the movable sliding groove.

[0010] In a preferred embodiment of the present invention, a first gate is provided in the inner cavity of the first mounting slot, and mounting blocks are fixedly connected to the two opposite side walls above the first gate. The two mounting blocks are symmetrical to each other, and a fixing rod is provided above each of the two mounting blocks. The two fixing rods are symmetrical to each other, and a swing arm is movably provided at the opposite end of each of the two fixing rods. The two swing arms are symmetrical to each other, and the other end of each swing arm is movably provided on a positioning block.

[0011] In a preferred embodiment of the present invention, two mutually symmetrical guide rods are fixedly connected in each of the two positioning slots, and trapezoidal plates are provided between each pair of the four guide rods, with the two trapezoidal plates being mutually symmetrical, and a top plate is provided above the four guide rods.

[0012] In a preferred embodiment of the present invention, the first fishing fence body and the second fishing fence body are each provided with a second installation slot, and a slot is provided above each of the two second installation slots. A second gate is movably arranged in the inner cavity of the slot, and the two second gates are respectively fitted into the second installation slots. A plurality of connecting rods are provided above each of the two second gates.

[0013] In a preferred embodiment of the present invention, two placement blocks are slidably arranged above each of the two trapezoidal plates, the four placement blocks are symmetrical to each other in pairs, and each of the four placement blocks is fixedly connected to an installation rod. A connecting rod is provided at one end of each pair of the four installation rods, and a connecting rod is provided at the bottom of each of the two connecting rods.

[0014] In a preferred embodiment of the present invention, two mutually symmetrical mounting brackets are vertically slidably arranged at opposite ends of the two connecting rods, and multiple equidistant movable rods are arranged at the bottom of the four mounting brackets. Each movable rod movably passes through the U-shaped fixed plate, and a drive plate is provided at the bottom of the movable rod.

[0015] Compared with the prior art, the present invention has the following advantages: In this invention, when filter-feeding fish remain inside the second fishing enclosure for an extended period, workers activate the attractant board and electric slide rail. This allows the attractant board to move towards the first fishing enclosure. As the slider within the electric slide rail moves, it also moves a fixing plate. This fixing plate opens both the second and first gates. When the fixing plate reaches a certain position, it closes both the second and first gates, allowing the filter-feeding fish to enter the first fishing enclosure. When it's time to catch the filter-feeding fish, workers use a lifting device to lift the first fishing enclosure, thus ensuring efficient catching of filter-feeding fish throughout the entire area.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 A three-dimensional structural diagram of a grazing-style aquaculture method for filter-feeding fish in large reservoirs; Figure 2 A schematic diagram of the internal cavity structure of a fence body for a grazing-style aquaculture method for filter-feeding fish in large reservoirs; Figure 3 A schematic diagram of a gate structure for a grazing-style aquaculture method for filter-feeding fish in large reservoirs; Figure 4 This is a schematic cross-sectional view of a gate structure for a grazing-style aquaculture method for filter-feeding fish in large reservoirs. Figure 5 This is a grazing-style aquaculture method for filter-feeding fish in large reservoirs. Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the inner cavity structure of a gate for a grazing-style aquaculture method for filter-feeding fish in large reservoirs. Figure 7 This is a schematic diagram of the second gate structure for a grazing-style aquaculture method for filter-feeding fish in large reservoirs; Figure 8 This is a side view of the second gate structure of a grazing-style aquaculture method for filter-feeding fish in large reservoirs.

[0018] In the picture: 100. Installation unit; 101. Fence body; 102. Gate; 1021. Rectangular slot; 1022. Placement slot; 1023. Moving slot; 1024. First sliding slot; 1025. Positioning slot; 1026. First installation slot; 1027. Second sliding slot; 103. First fishing fence body; 1031. Second fishing fence body; 1032. U-shaped fixing plate; 1033. Second installation slot; 104. First gate; 1041. Fixing rod; 1042. Installation block; 200. Transmission unit; 201. Electric slide rail; 2011. Fixing plate; 2012. Fish attractant plate; 202. Moving slide; 2021. Moving slider; 2022. Return spring; 2023. Wedge plate; 2024. Positioning block; 2025. Swing arm; 300. Fishing unit; 301. Trapezoidal plate; 3011. Guide rod; 3012. Top plate; 302. Placement block; 3021. Mounting rod; 3022. Connecting rod; 3023. Connecting rod; 3024. Second gate; 303. Mounting bracket; 3031. Moving rod; 3032. Drive plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention. Example

[0020] like Figures 1 to 8 As shown, a grazing-style aquaculture method for filter-feeding fish in a large reservoir includes an installation unit 100, a transmission unit 200, and a fishing unit 300. The installation unit 100 includes a fence body 101, with a gate 102 inside the fence body 101. A first fishing fence body 103 and a second fishing fence body 1031 are respectively installed on both sides of the gate 102 inside the fence body 101. The fishing unit 300 includes two U-shaped fixing plates 1032, which are respectively installed on the inner walls above the first fishing fence body 103 and the second fishing fence body 1031. The transmission unit 200 includes two electric slide rails 201, which are respectively installed on opposite side walls of the fence body 101 and are symmetrical to each other. First, when filter-feeding fish stay in the second fishing fence body 1031 for a long time, the staff activates the fish-attracting plate 2012 and the electric slide rail 201, allowing the fish-attracting plate 2012 to move towards the first fishing fence body 103. When the slider in the electric slide rail 201 moves, it can also drive the fixed plate 2011 to move. The fixed plate 2011 can open the second gate 3024 and the first gate 104. At the same time, when the fixed plate 2011 moves to a certain position, it can close the second gate 3024 and then close the first gate 104. Therefore, filter-feeding fish can enter the first fishing fence body 103. When it is necessary to catch the filter-feeding fish, the staff can lift the first fishing fence body 103 using the lifting device to catch the filter-feeding fish.

[0021] like Figures 1 to 5 As shown, in a specific embodiment, a first mounting slot 1026 is provided at the bottom of the gate 102, and a rectangular slot 1021 is provided above the first mounting slot 1026. The rectangular slot 1021 movably passes through the gate 102. Placement slots 1022 are provided on both sides of the rectangular slot 1021 on the gate 102. A second sliding slot 1027 is provided on the opposite side wall of the two placement slots 1022 on the gate 102. The two second sliding slots 1027 are symmetrical to each other, and a moving slot 1023 is also provided on the opposite side wall of the two second sliding slots 1027 and the gate 102. The two moving slots 1023 movably pass through the gate 102 respectively. A first sliding slot 1024 is provided on the gate 102 at the opposite end of the two moving slots 1023, and a positioning slot 1025 is provided on the gate 102 at the opposite end of the two first sliding slots 1024. In this setup, the shape and components of gate 102 are defined. Example

[0022] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a grazing-style aquaculture method for filter-feeding fish in a large reservoir is described. Two electrically operated sliding rails 201 are movably inserted through the inner cavity of a movable slot 1023. Wedge-shaped plates 2023 are symmetrically positioned on opposite sides of the two movable slots 1023. The two wedge-shaped plates 2023 are movably disposed within a second sliding slot 1027. Positioning blocks 2024 are fixedly connected to opposite ends of the two wedge-shaped plates 2023. In this configuration, the installation position of the wedge-shaped plates 2023 is determined.

[0023] like Figures 1 to 4 and Figures 6 to 7 As shown, in a specific embodiment, a fixing plate 2011 is slidably disposed above the two electric slide rails 201, and a fish-attracting plate 2012 is slidably disposed at the bottom of the two electric slide rails 201. The two fixing plates 2011 respectively movably pass through the first sliding groove 1024 and the positioning groove 1025. In this configuration, the position of the fish-attracting plate 2012 is determined.

[0024] like Figures 1 to 6 As shown, furthermore, the two wedge plates 2023 are respectively provided with sliding mechanisms on the opposite side walls of the inner cavity of the second sliding groove 1027. The sliding mechanism includes four movable sliding grooves 202, which are respectively opened on the opposite side walls of the inner cavity of the two second sliding grooves 1027. Each movable sliding groove 202 is symmetrical to each other, and each movable sliding groove 202 has a movable slider 2021 slidably disposed in its inner cavity. Each movable slider 2021 is symmetrical to each other and is disposed on the wedge plate 2023 in pairs. Each movable slider 2021 is provided with a return spring 2022, and the other end of the return spring 2022 is disposed on the movable sliding groove 202. In this configuration, it is ensured that the wedge plate 2023 can move horizontally with the assistance of the movable sliding grooves 202 and the movable sliders 2021. Example

[0025] The difference between the above embodiments and this embodiment is that: Figures 1 to 7As shown, a grazing-style aquaculture method for filter-feeding fish in a large reservoir is described. A first gate 104 is provided within the inner cavity of the first installation slot 1026. Installation blocks 1042 are fixedly connected to the opposite side walls above the first gate 104. The two installation blocks 1042 are symmetrical. A fixing rod 1041 is respectively provided above each of the two installation blocks 1042. The two fixing rods 1041 are symmetrical. A swing arm 2025 is movably mounted on the opposite end of each of the two fixing rods 1041. The two swing arms 2025 are symmetrical. The other end of each swing arm 2025 is movably mounted on a positioning block 2024. This configuration ensures that when the wedge plate 2023 moves to a certain position, it can drive the positioning block 2024 to move horizontally. When the positioning block 2024 moves to a certain position, it can drive the swing arm 2025 to drive the fixing rod 1041 to move vertically upward.

[0026] like Figures 1 to 4 and Figures 6 to 8 As shown in the specific embodiment, two mutually symmetrical guide rods 3011 are fixedly connected to each of the two positioning slots 1025. A trapezoidal plate 301 is arranged between each pair of the four guide rods 3011, with the two trapezoidal plates 301 being symmetrical to each other. A top plate 3012 is arranged above the four guide rods 3011. In this arrangement, it is ensured that the trapezoidal plates 301 can move vertically.

[0027] like Figures 1 to 4 and Figures 6 to 8 As shown, furthermore, both the first fishing fence body 103 and the second fishing fence body 1031 are provided with second mounting slots 1033. Above each of the two second mounting slots 1033 is a slot, and a second gate 3024 is movably disposed within the cavity of the slot. The two second gates 3024 are respectively fitted into the second mounting slots 1033. Above each of the two second gates 3024 are multiple connecting rods 3023 equidistantly distributed. In this configuration, the position of the second gates 3024 is determined.

[0028] like Figures 1 to 4 and Figures 6 to 8 As shown, furthermore, two placement blocks 302 are slidably disposed above each of the two trapezoidal plates 301. The four placement blocks 302 are symmetrically arranged in pairs. Each of the four placement blocks 302 is fixedly connected to an installation rod 3021. A connecting rod 3022 is provided at one end of each pair of opposite installation rods 3021. A connecting rod 3023 is provided at the bottom of each of the two connecting rods 3022. In this configuration, the installation position and connection relationship of the connecting rods 3022 are determined.

[0029] like Figures 1 to 4 and Figures 6 to 8As shown, furthermore, two symmetrical mounting brackets 303 are vertically slidably arranged at opposite ends of the two connecting rods 3022. Multiple equidistant moving rods 3031 are arranged at the bottom of each of the four mounting brackets 303. Each moving rod 3031 movably passes through the U-shaped fixing plate 1032, and a drive plate 3032 is provided at the bottom of the moving rod 3031. This arrangement ensures that workers can lift the mounting brackets 303 using robotic arms, etc. Therefore, when the mounting brackets 303 move to a certain position, the moving rods 3031 will drive the drive plate 3032 to move vertically upwards. When the drive plate 3032 moves upwards to a certain position, it will drive the U-shaped fixing plate 1032 to move upwards, thereby driving the first fishing fence body 103 to move vertically upwards, allowing the first fishing fence body 103 to be removed. This facilitates the catching of filter-feeding fish within the first fishing fence body 103.

[0030] The implementation principle of the grazing-style aquaculture method for filter-feeding fish in large reservoirs in this embodiment is as follows: First, the staff places filter-feeding fish into the second fishing fence body 1031 installed in the fence body 101. When it is necessary to change the feeding area of ​​the second fishing fence body 1031, the staff activates the electric slide rail 201. Therefore, the electric slide rail 201 can drive the fixed plate 2011 to move. When the fixed plate 2011 moves to a certain position, it can press the trapezoidal plate 301 and move it vertically upward with the assistance of the guide rod 3011. When it moves upward, it will cause the placement block 302 to move upward. When the placement block 302 moves upward, it will cause the mounting rod 3021 to move vertically upward. When the mounting rod 3021 moves upward, it will cause the connecting rod 3022 to move upward. When the connecting rod 3022 moves upward, it will cause the connecting rod 3023 to move upward, which will cause the second gate 3024 to move vertically upward. Therefore, the second mounting slot 1033 opened on the first fishing fence body 103 can be opened. When the fixed plate 2011 moves to a certain position, that is, when the fixed plate 2011 enters the moving slot 1023, the fixed plate 2011 presses against the inclined surface of the wedge plate 2023. Therefore, the wedge plate 2023 can move horizontally with the assistance of the moving slide 202 and the moving slider 2021. When the wedge plate 2023 moves to a certain position, it can drive the positioning block 2024 to move horizontally. When the positioning block 2024 moves to a certain position, it can drive the swing arm 2025 to drive the fixed rod 1041 to move vertically upward, thereby opening the first mounting slot 1026 (because the fixed rod 1041 is fixedly installed on the mounting block 1042, and the mounting block 1042 is fixedly installed on the first gate 104, so it can drive the first gate 104 to move vertically upward, because the mounting block 1042 and the rectangular slot 1021 fit each other and slide). When the first gate 104 is opened, the electric slide rail 201 will drive the fish attractant plate 2012 into the first fishing fence body 103. At the same time, when the electric slide rail 201 drives the fixed plate 2011 to continue to move a certain distance, the trapezoidal plate 301 will fall down under the action of gravity, thereby closing the second gate 3024 and changing the feeding environment for filter-feeding fish. When it is necessary to catch filter-feeding fish, the staff can use a robotic arm to lift the mounting bracket 303 (because the mounting bracket 303 is slidably set on the connecting rod 3022, the initial position of the mounting bracket 303 is located at the top of the inner cavity of the sliding groove set on the connecting rod 3022 when it is lifted, so that the connecting rod 3022 can move together, ensuring that the second gate 3024 will not open). Therefore, when the mounting bracket 303 moves to a certain position, it can drive the drive plate 3032 to move vertically upward through the moving rod 3031. When the drive plate 3032 moves upward to a certain position, it can drive the U-shaped fixing plate 1032 to move upward, thereby driving the first fishing fence body 103 to move vertically upward through the U-shaped fixing plate 1032, so that the first fishing fence body 103 can be taken out, thus facilitating the catching of filter-feeding fish inside the first fishing fence body 103.

[0031] First, when filter-feeding fish stay in the second fishing fence body 1031 for a long time, the staff activates the fish-attracting plate 2012 and the electric slide rail 201, allowing the fish-attracting plate 2012 to move towards the first fishing fence body 103. When the slider in the electric slide rail 201 moves, it can also drive the fixed plate 2011 to move. The fixed plate 2011 can open the second gate 3024 and the first gate 104. At the same time, when the fixed plate 2011 moves to a certain position, it can close the second gate 3024 and then close the first gate 104. Therefore, filter-feeding fish can enter the first fishing fence body 103. When it is necessary to catch the filter-feeding fish, the staff can lift the first fishing fence body 103 using the lifting device to catch the filter-feeding fish.

Claims

1. A grazing-style aquaculture method for filter-feeding fish in large reservoirs, comprising an installation unit (100), a transmission unit (200), and a harvesting unit (300), characterized in that: The installation unit (100) includes a fence body (101), and a gate (102) is provided in the inner cavity of the fence body (101). A first fishing fence body (103) and a second fishing fence body (1031) are respectively provided in the fence body (101) on both sides of the gate (102). The gate (102) is provided with a moving slot (1023), a first sliding slot (1024), a positioning slot (1025), and a second sliding slot (1027). A first installation slot (1026) is provided at the bottom of the gate (102), and a first gate (104) is provided in the inner cavity of the first installation slot (1026). A fixing rod (1041) is fixedly connected above the first gate (104). The fishing unit (300) includes two U-shaped fixing plates (1032), which are respectively disposed on the inner walls above the first fishing fence body (103) and the second fishing fence body (1031). The first fishing fence body (103) and the second fishing fence body (1031) are each provided with a second installation slot (1033). Two second gates (3024) are respectively fitted into the second installation slots (1033). A slot is provided above the two second installation slots (1033). The second gates (3024) are movably disposed in the inner cavity of the slots. Multiple connecting rods (3023) are provided above the two second gates (3024). A trapezoidal plate (301) is provided in the positioning slot (1025). The trapezoidal plate (301) is connected to the second gates (3024) through the connecting rods (3023). The transmission unit (200) includes two electric slide rails (201), which are respectively disposed on opposite side walls of the fence body (101). The two electric slide rails (201) are symmetrical to each other. Fixed plates (2011) are slidably disposed on the two electric slide rails (201). The two fixed plates (2011) are respectively movably inserted through the first sliding slot (1024) and the positioning slot (1025). The two electric slide rails (201) are respectively movably inserted through the inner cavity of the moving slot (1023). The two moving slots (1023) are provided with wedge plates (2023). A positioning block (2024) is fixedly connected to one end of the two wedge plates (2023) opposite to each other. The two wedge plates (2023) are respectively movably disposed in the second sliding slot (1027). Two fixed rods (1041) are respectively movably connected to the positioning block (2024) through the swing arm (2025). When it is necessary to change the feeding area of ​​the second fishing fence body (1031), the electric slide rail (201) is activated, which drives the fixed plate (2011) to move. When the fixed plate (2011) moves to a certain position, it squeezes the trapezoidal plate (301) to move it vertically upward, which in turn drives the connecting rod (3023) to move upward, thus driving the second gate (3024) to move vertically upward. Therefore, the second mounting slot (1033) opened on the first fishing fence body (103) can be opened. When the fixed plate (2011) is activated, the second gate (3024) can move vertically upward. 11) When the device moves into the moving slot (1023), the fixing plate (2011) presses against the inclined surface of the wedge plate (2023) to make it move horizontally. When the wedge plate (2023) moves to a certain position, it drives the positioning block (2024) to move horizontally. When the positioning block (2024) moves to a certain position, it drives the swing arm (2025) to swing. The swing arm (2025) drives the fixing rod (1041) to move vertically upward, thereby driving the first gate (104) to move vertically upward, thereby opening the first mounting slot (1026).

2. The method according to claim 1, wherein A rectangular slot (1021) is provided above the first mounting slot (1026), the rectangular slot (1021) is movably inserted through the gate (102), and the gate (102) is provided with placement slots (1022) on both sides of the rectangular slot (1021).

3. The method according to claim 1, wherein Fish attracting plates (2012) are also slidably installed at the bottom of the two electric slide rails (201).

4. A grazing-style aquaculture method for filter-feeding fish in large reservoirs according to claim 1, characterized in that, The two wedge plates (2023) are respectively provided with sliding mechanisms on the opposite side walls of the inner cavity of the second sliding groove (1027). The sliding mechanism includes four movable sliding grooves (202). The four movable sliding grooves (202) are respectively opened on the opposite side walls of the inner cavity of the two second sliding grooves (1027). Each movable sliding groove (202) is symmetrical to each other. Each movable sliding groove (202) is slidably provided with a movable slider (2021) in its inner cavity. Each movable slider (2021) is symmetrical to each other in pairs. Each movable slider (2021) is arranged on the wedge plate (2023) in pairs. Each movable slider (2021) is provided with a return spring (2022), and the other end of the return spring (2022) is arranged on the movable sliding groove (202).

5. A grazing-style aquaculture method for filter-feeding fish in large reservoirs according to claim 1, characterized in that, The first gate (104) is fixedly connected to the two opposite side walls above it. The two mounting blocks (1042) are symmetrical to each other. The two fixing rods (1041) are symmetrical to each other. The opposite ends of the two fixing rods (1041) are movably connected to the swing arms (2025). The two swing arms (2025) are symmetrical to each other. The other ends of the two swing arms (2025) are movably connected to the positioning blocks (2024).

6. A grazing-style aquaculture method for filter-feeding fish in large reservoirs according to claim 1, characterized in that, Two mutually symmetrical guide rods (3011) are fixedly connected in each of the two positioning slots (1025). A trapezoidal plate (301) is provided between each pair of guide rods (3011). The two trapezoidal plates (301) are mutually symmetrical. A top plate (3012) is provided above the four guide rods (3011).

7. A grazing-style aquaculture method for filter-feeding fish in large reservoirs according to claim 6, characterized in that, Two placement blocks (302) are slidably arranged above each of the two trapezoidal plates (301). The four placement blocks (302) are symmetrical to each other in pairs. An installation rod (3021) is fixedly connected above each of the four placement blocks (302). A connecting rod (3022) is provided at one end of each pair of the four installation rods (3021). A connecting rod (3023) is provided at the bottom of each of the two connecting rods (3022).

8. A grazing-style aquaculture method for filter-feeding fish in large reservoirs according to claim 7, characterized in that, Two symmetrical mounting brackets (303) are vertically slidably arranged at opposite ends of the two connecting rods (3022). Multiple movable rods (3031) are equidistantly arranged at the bottom of the four mounting brackets (303). Each movable rod (3031) is movably inserted through the U-shaped fixing plate (1032), and a drive plate (3032) is provided at the bottom of the movable rod (3031).

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