CN115299241B - Device for cleaning and harvesting winter-damping aquatic plants under gravel condition - Google Patents
Device for cleaning and harvesting winter-damping aquatic plants under gravel condition Download PDFInfo
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- CN115299241B CN115299241B CN202211005243.5A CN202211005243A CN115299241B CN 115299241 B CN115299241 B CN 115299241B CN 202211005243 A CN202211005243 A CN 202211005243A CN 115299241 B CN115299241 B CN 115299241B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D44/00—Harvesting of underwater plants, e.g. harvesting of seaweed
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Abstract
The invention discloses a device for cleaning and harvesting winter-dead aquatic plants under gravel conditions, which comprises two plate bodies, namely a fixed plate and a movable plate. The movable plate is arranged in parallel with the fixed plate, the fixed plate is divided into a toothed plate part and a driving part, one side wall of the toothed plate part is fixedly connected with the driving part, a mounting plate is arranged on the other side wall of the toothed plate part at equal intervals, a wedge-shaped shovel head is arranged at the end part of the mounting plate, a plurality of hooks are arranged on the surface of the mounting plate and positioned between the fixed plate and the movable plate, the driving mechanism comprises a driving rod, the fixed end of the driving rod penetrates through the movable plate, the fixed end of the fixed end is movably connected with the fixed plate, a first eccentric wheel is sleeved on the movable end of the driving rod, the first eccentric wheel is connected with the movable plate through a ball bearing, the driving rod rotates to drive the first eccentric wheel to rotate, the hooks on the surface of the mounting plate of the movable plate continuously wind the aquatic weeds around the hooks of the movable plate, which are pulled by the hooks of the hook seat of the fixed plate.
Description
Technical Field
The invention belongs to the technical field of environmental protection equipment, and relates to a device for cleaning and harvesting winter-damping-off aquatic plants under a gravel condition.
Background
The water pool constructed in the city beautifies the urban environment, and soil or gravel is added into the artificial hydrologic scenic spot to increase the attractiveness, so that the artificial hydrologic scenic spot is used as a substrate for planting ornamental aquatic plants and raising ornamental fishes, and the artificial hydrologic scenic spot sequentially increases the beauty of the city by one minute.
The aquatic plants in the water pool are mostly submerged plants, the submerged plants are large aquatic plant groups which are physiologically attached to the water environment and all plant bodies are located below the water surface for fixation and survival. The submerged plant not only can absorb and convert nitrogen, phosphorus and nondegradable organic pollutants in water and bottom mud and has a purifying effect on eutrophic water, but also can adjust the material circulation speed of a water ecological system, increase the diversity of water organisms, control the growth of algae, thereby effectively improving the water quality and the ecological environment.
In winter, the withered and rotten submerged plants are poured, and the rotted submerged plants can cause water quality deterioration after decomposition, so that the submerged plants cannot play the roles of absorbing nutrients and purifying water, but become pollution sources in the water pool, and the withered and rotted aquatic plants are required to be cleaned in time in order to ensure the cleanness and the attractiveness of the water pool. The inside of the pool is paved with gravel beach, a common cutting device is not suitable for cleaning under the gravel condition, the gravel can collide with a driving wheel shaft of the blade and the rotating blade, and the blade can not turn the gravel, so that a harvesting device capable of turning the gravel and continuously pulling up and cleaning up dead aquatic plants is needed.
Disclosure of Invention
The invention aims to provide a device for cleaning and harvesting winter-damping aquatic plants under gravel conditions, which solves the problems of the background technology.
The technical scheme adopted by the invention is that the device for cleaning and harvesting the winter-damping-off aquatic plants under the gravel condition comprises:
the shell plate assembly comprises a fixed plate and a movable plate, and the movable plate is arranged in parallel with the fixed plate;
the fixed plate is divided into a toothed plate part and a driving part, the driving part is fixedly connected to the side wall of one side of the toothed plate part, the mounting plates are arranged on the side wall of the other side of the toothed plate part at equal intervals, and the moving plate structure is the same as that of the fixed plate;
the driving mechanism is positioned between the fixed plate and the movable plate and is arranged on the surface of the driving part of the movable plate;
the driving mechanism comprises a driving rod, the fixed end of the driving rod penetrates through the moving plate, the end part of the fixed end is movably connected with the fixed plate, the movable end of the driving rod is sleeved with a first eccentric wheel, the first eccentric wheel is embedded on the moving plate, and the first eccentric wheel is rotationally connected with the moving plate;
the hooks are positioned between the fixed plate and the movable plate and are arranged on the surface of the mounting plate.
The invention is also characterized in that:
the movable end of the driving rod is provided with a paddle mechanism.
The paddle mechanism comprises a rotary drum, the rotary drum is sleeved on the outer wall of the movable end of the driving rod, an arc-shaped paddle is fixedly connected to the outer wall of the rotary drum, a protection net sleeve is further arranged on the outer wall of the driving rod, and the paddle is located in the protection net sleeve.
A limiting mechanism is arranged between the fixed plate and the movable plate.
The limiting mechanism comprises a spring, the spring is sleeved on the outer wall of the driving rod, the fixed end of the spring is fixedly connected with a fixed plate, the winding direction of the spring is the same as the rotating direction of the paddle, limiting holes are formed in the same positions of the fixed plate and the moving plate, and positioning pins are inserted into the two limiting holes.
A reversing mechanism is arranged between the fixed plate and the movable plate.
The reversing mechanism comprises a driving gear, the driving gear is sleeved on the outer wall of the driving rod, a driven gear is meshed with the driving gear, an amplifying gear is fixedly connected to one side surface of the driven gear, the radius of the amplifying gear is larger than that of the driven gear, the number of teeth of the amplifying gear is larger than that of the driven gear, an output gear is meshed with the amplifying gear, and the output gear and the amplifying gear are rotationally connected to the fixed plate;
the surface rigid coupling of output gear has the output pole, and output pole stiff end runs through the movable plate, stiff end tip swing joint fixed plate, and output pole activity pot head is equipped with the second eccentric wheel, and the second eccentric wheel inlays and establishes on the movable plate, and the second eccentric wheel rotates with the movable plate to be connected.
The end of the mounting plate is provided with a wedge-shaped shovel head.
The beneficial effects of the invention are as follows:
1. the invention is different from the traditional device for salvaging and cleaning the aquatic weeds floating on the water surface, and mainly aims at a pool in a city, and can harvest submerged plants planted in a gravel beach.
2. According to the invention, the movable plate is matched with the fixed plate, the movable plate is shoveled into the gravel beach, the rootstocks of withered aquatic plants withered in the gravel beach are dug out, then the rootstocks are collected in a winding mode, and meanwhile, the water flow generated by shoveling is used as a power source to drive the driving mechanism to complete the operation of winding aquatic plants.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of an apparatus for cleaning and harvesting winter-dead aquatic plants under gravel conditions according to the present invention;
FIG. 2 is a top view of an embodiment 2 of the apparatus for cleaning and harvesting winter-damping-off aquatic plants under gravel conditions of the present invention;
FIG. 3 is a forward operating state diagram of example 3 of an apparatus for cleaning and harvesting winter-damping-off aquatic plants under gravel conditions in accordance with the present invention;
FIG. 4 is a reverse operating condition diagram of example 3 of an apparatus for cleaning harvesting winter-damping-off aquatic plants under gravel conditions in accordance with the present invention;
FIG. 5 is a storyboard view of example 3 of an apparatus for cleaning harvesting winter-damping-off aquatic plants under gravel conditions in accordance with the present invention;
in the drawings, 1 part of the shell plate assembly, 2 part of the driving mechanism, 3 part of the hook, 4 part of the paddle mechanism, 5 part of the limiting mechanism, 6 part of the reversing mechanism, 7 part of the wedge shovel head, 8 part of the protective net, 9 part of the holding rod, 1-1 part of the fixed plate, 1-2 part of the moving plate, 1-3 part of the toothed plate part, 1-4 part of the driving part, 1-5 part of the mounting plate, 2-1 part of the driving rod, 2-2 part of the first eccentric wheel, 4-1 part of the rotary cylinder, 4-2 part of the paddle, 4-3 part of the protective net sleeve, 5-1 part of the spring, 5-2 part of the positioning pin, 6-1 part of the driving gear, 6-2 part of the driven gear, 6-3 part of the amplifying gear, 6-4 part of the output gear, 6-5 part of the output rod and 6-6 part of the second eccentric wheel.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
Example 1
A device for cleaning and harvesting winter-damping aquatic plants under gravel conditions is shown in fig. 1, and comprises a shell plate assembly 1, wherein the shell plate assembly 1 is divided into a fixed plate 1-1 and a movable plate 1-2, and the fixed plate 1-1 is fixedly connected with a holding rod 9, and the fixed plate 1-1 and the movable plate have the same size and structure. The movable plate 1-2 and the fixed plate 1-1 are arranged in parallel, the fixed plate 1-1 is divided into two parts of a toothed plate part 1-3 and a driving part 1-4, one side wall of the toothed plate part 1-3 is fixedly connected with the driving part 1-4, the other side wall of the toothed plate part 1-3 is provided with mounting plates 1-5 at equal intervals, the end part of the mounting plate 1-3 is provided with a wedge-shaped shovel head, the surface of the mounting plate 1-3 is provided with a plurality of hooks 3, the hooks 3 are positioned between the fixed plate 1-1 and the movable plate 1-2, gaps are reserved between the hooks 3, the rhizome of aquatic weed slides into the space between the two mounting plates 1-5 of the mounting plates 1-5 and is hung by the hooks 3 on the surface of the mounting plates 1-5, and the aquatic weed is wound on the hooks 3.
The driving mechanism 2 is positioned between the fixed plate 1-1 and the movable plate 1-2, is arranged on the surface of the driving part 1-4 of the movable plate 1-2, and comprises a driving rod 2-1, wherein the fixed end of the driving rod 2-1 penetrates through the movable plate 1-2, the fixed end part of the driving rod 2-1 is movably connected with the fixed plate 1-1, a first eccentric wheel 2-2 is sleeved at the movable end of the driving rod 2-1, the first eccentric wheel 2-2 is embedded on the movable plate 1-2, the first eccentric wheel 2-2 is connected with the movable plate 1-2 through a ball bearing, and the driving rod 2-1 rotates to drive the first eccentric wheel 2-2 to rotate.
The movable plate 1-2 is driven by the first eccentric wheel 2-2, rotates around the driving rod 2-1, the fixed plate 1-1 is kept motionless, the movable plate 1-2 moves horizontally relative to the fixed plate, the hooks 3 on the surface of the mounting plate 1-5 of the movable plate 1-2 are used for making hooks 3 of the fixed plate 1-1 and 1-2 around the hooks 3 seat of the fixed plate 1-1, and the aquatic weed is pulled by the hooks 3 to be continuously wound on the hooks 3 of the movable plate 1-2.
Example 2
As shown in fig. 2, on the basis of embodiment 1, the movable end of the driving rod 2-1 is provided with a paddle mechanism 4, the paddle mechanism 4 comprises a rotary drum 4-1, the rotary drum 4-1 is sleeved on the outer wall of the movable end of the driving rod 2-1 through a bearing, an arc-shaped paddle 4-2 is fixedly connected on the outer wall of the rotary drum 4-1, a protection net sleeve 4-3 is further arranged on the outer wall of the driving rod 2-1, the paddle 4-2 is positioned in the protection net sleeve 4-3, the shell plate assembly 1 moves in water, water flow generated by movement rotates the paddle 4-2, and the paddle 4-2 generates power of the driving rod 2-1.
A limiting mechanism 5 is arranged between the fixed plate 1-1 and the movable plate 1-2, the limiting mechanism 5 comprises a spring 5-1, the spring 5-1 is sleeved on the outer wall of the driving rod 2-1, the fixed end of the spring 5-1 is fixedly connected with the fixed plate 1-1, the winding direction of the spring 5-1 is the same as the rotating direction of the paddle 4-2, limiting holes are formed in the same positions of the fixed plate 1-1 and the movable plate 1-2, positioning pins 5-2 are inserted into the two limiting holes, the driving rod 2-1 winds up the spring while rotating, and when the spring is wound up to the limit, the driving rod 2-1 stops rotating and is inserted into the positioning pins 5-2 to fix the positions of the fixed plate and the movable plate 1-2.
Example 3
On the basis of embodiment 2, a reversing mechanism 6 is arranged between a fixed plate 1-1 and a movable plate 1-2, a driving rod 2-1 and the fixed plate 1-1 are detachably connected with the movable plate 1-2, specifically, the driving rod 2-1 is divided into two sections, the middle of the two sections of driving rods 2-1 is connected through threads, the upper section of driving rod 2-1 penetrates through the fixed plate 1-1 and is connected with the lower section of driving rod through threads, a protective net 8 is arranged at the driving part of the fixed plate 1-1, and the protective net 8 is used for placing gravel to be clamped into the reversing mechanism 6 to influence the normal operation of the gravel.
In the process of reversing the mechanism 6 using the reversing mechanism 6, it is necessary to detach the upper half of the driving lever 2-1 and pull out the positioning pin 5-2 from the positioning hole. The reversing mechanism 6 enables the moving plate 1-2 to reversely rotate, and the aquatic weed wound on the hook 3 is loosened, so that the aquatic weed can be thoroughly cleaned from the hook 3, and the aquatic weed can be cut off by a saw blade.
As shown in fig. 3, 4 and 5, the reversing mechanism 6 includes a driving gear 6-1, the driving gear 6-1 is arranged on the outer wall of the lower section of the driving rod 2-1, the driving gear 6-1 is meshed with a driven gear 6-2, an amplifying gear 6-3 is fixedly connected to one side surface of the driven gear 6-2, the radius of the amplifying gear 6-3 is larger than that of the driven gear 6-2, the number of teeth of the amplifying gear 6-3 is larger than that of the driven gear 6-2, the amplifying gear 6-3 is meshed with an output gear 6-4, the output gear 6-4 and the amplifying gear 6-3 are rotatably connected to the fixed plate 1-1, the number of turns of the output gear = the number of turns of the driving gear/(number of teeth of driven gear/(number of teeth of the amplifying gear)), and the number of turns of the amplifying gear is adjusted, so that the number of turns of the reverse turns of the moving plate 1-2 can be increased.
The surface rigid coupling of output gear 6-4 has output pole 6-5, and output pole 6-5 stiff end runs through movable plate 1-2, stiff end tip swing joint fixed plate 1-1, and the clockwork spring is released and is driven half output pole 6-5 rotation down in reverse, drives several gears in proper order and rotates, and output pole 6-5 movable pot head is equipped with second eccentric wheel 6-6, and second eccentric wheel 6-6 inlays and establishes on movable plate 1-2, and second eccentric wheel 6-6 is connected with the rotation of movable plate 1-2.
The output rod 6-5 rotates along with the output gear 6-4, the movable plate 1-2 is driven by the output rod 6-5, the hooks 3 on the surface of the mounting plate 1-5 of the movable plate 1-2 do reverse circular motion around the hooks 3 of the fixed plate 1-1, the saw blade is inserted between the hooks 3, the hooks 3 drive the aquatic weed to contact with the saw blade in the process of unwinding the aquatic weed, the saw blade cuts the aquatic weed into small sections, and the aquatic weed falls off and is collected from the side.
The invention relates to a device for cleaning and harvesting winter-damping aquatic plants under gravel conditions, which comprises the following working processes:
the user holds the holding rod, insert the fixed plate of shell plate subassembly in the gravel beach, the movable plate spills the gravel beach, and promote whole device forward, after the fixed plate shovel was gone into the gravel beach, dig out the rhizome of dead aquatic plant that takes root and wither in the gravel beach, dead aquatic plant rhizome can slide in between the mounting panel along with rivers, then be hung by the couple on mounting panel surface, at this moment, the couple on mounting panel surface of movable plate is circular motion around the couple of fixed plate, the pasture and water on the couple is twined, regard the couple of fixed plate as the origin, the couple pulling pasture and water of movable plate constantly twines the couple of movable plate on the pasture and water. The whole winding process is continued until the spring of the limiting mechanism is pulled to the tightest state, the driving rod cannot continue to rotate, and the limiting pin is inserted to fix the positions of the two plates.
The device is taken out of water, the saw blade is inserted between the hooks, then the upper half of the lower driving rod is detached, the output rod is installed, the limiting pin is taken out, the spring is loosened to reversely drive the lower half of the output rod to rotate, the gears are sequentially driven to rotate, the hooks on the surface of the mounting plate of the moving plate do reverse circular motion around the hooks of the fixing plate, the saw blade is inserted between the hooks, the hooks are used for driving the water plants to contact the saw blade in the process of unwinding the water plants, the saw blade cuts the water plants into small sections, and the water plants drop from the side surfaces to collect the water plants.
The device for cleaning and harvesting the winter-damping aquatic plants under the gravel condition has the advantages that:
the invention is different from the traditional device for salvaging and cleaning the aquatic weeds floating on the water surface, and mainly aims at a pool in a city, and can harvest submerged plants planted in a gravel beach. According to the invention, the movable plate is matched with the fixed plate, the movable plate is shoveled into the gravel beach, the rootstocks of withered aquatic plants withered in the gravel beach are dug out, then the rootstocks are collected in a winding mode, and meanwhile, the water flow generated by shoveling is used as a power source to drive the driving mechanism to complete the operation of winding aquatic plants.
Claims (6)
1. A device for cleaning and harvesting winter-damping-off aquatic plants under gravel conditions, comprising:
the shell plate assembly (1) comprises a fixed plate (1-1) and a movable plate (1-2), wherein the movable plate (1-2) is arranged in parallel with the fixed plate (1-1);
the fixed plate (1-1) is divided into two parts, namely a toothed plate part (1-3) and a driving part (1-4), wherein the driving part (1-4) is fixedly connected to one side wall of the toothed plate part (1-3), mounting plates (1-5) are arranged on the other side wall of the toothed plate part (1-3) at equal intervals, and the structure of the movable plate (1-2) is the same as that of the fixed plate (1-1);
the driving mechanism (2) is positioned between the fixed plate (1-1) and the movable plate (1-2) and is arranged on the surface of the driving part (1-4) of the movable plate (1-2);
the driving mechanism (2) comprises a driving rod (2-1), a fixed end of the driving rod (2-1) penetrates through the moving plate (1-2), the fixed end part is movably connected with the fixed plate (1-1), a first eccentric wheel (2-2) is sleeved at the movable end of the driving rod (2-1), the first eccentric wheel (2-2) is embedded on the moving plate (1-2), and the first eccentric wheel (2-2) is rotationally connected with the moving plate (1-2);
the hooks (3) are positioned between the fixed plate (1-1) and the movable plate (1-2) and are arranged on the surface of the mounting plate (1-3);
a reversing mechanism (6) is arranged between the fixed plate (1-1) and the movable plate (1-2);
the reversing mechanism (6) comprises a driving gear (6-1), the driving gear (6-1) is sleeved on the outer wall of the driving rod (2-1), the driving gear (6-1) is meshed with a driven gear (6-2), an amplifying gear (6-3) is fixedly connected to one side surface of the driven gear (6-2), the radius of the amplifying gear (6-3) is larger than that of the driven gear (6-2), the number of teeth of the amplifying gear (6-3) is larger than that of the driven gear (6-2), the amplifying gear (6-3) is meshed with an output gear (6-4), and the output gear (6-4) and the amplifying gear (6-3) are rotationally connected to the fixed plate (1-1);
the surface rigid coupling of output gear (6-4) has output pole (6-5), output pole (6-5) stiff end runs through movable plate (1-2), stiff end swing joint fixed plate (1-1), output pole (6-5) activity pot head is equipped with second eccentric wheel (6-6), second eccentric wheel (6-6) inlay and establish on movable plate (1-2), second eccentric wheel (6-6) are connected with the rotation of movable plate (1-2).
2. Device for cleaning and harvesting aquatic plants in the presence of gravel according to claim 1, characterized in that the movable end of the driving rod (2-1) is provided with a paddle mechanism (4).
3. The device for cleaning and harvesting winter-damping-off aquatic plants under gravel conditions according to claim 2, wherein the paddle mechanism (4) comprises a rotary drum (4-1), the rotary drum (4-1) is sleeved on the outer wall of the movable end of the driving rod (2-1), an arc-shaped paddle (4-2) is fixedly connected to the outer wall of the rotary drum (4-1), a protective net sleeve (4-3) is further arranged on the outer wall of the driving rod (2-1), and the paddle (4-2) is located in the protective net sleeve (4-3).
4. A device for cleaning and harvesting winter-damping-off aquatic plants under gravel conditions according to claim 3, characterized in that a limiting mechanism (5) is arranged between the fixed plate (1-1) and the moving plate (1-2).
5. The device for cleaning and harvesting winter-damping-off aquatic plants under gravel conditions according to claim 4, wherein the limiting mechanism (5) comprises a spring (5-1), the spring (5-1) is sleeved on the outer wall of the driving rod (2-1), a fixed end of the spring (5-1) is fixedly connected with a fixed plate (1-1), the winding direction of the spring (5-1) is the same as the rotating direction of the paddle (4-2), limiting holes are formed in the same positions of the fixed plate (1-1) and the movable plate (1-2), and positioning pins (5-2) are inserted into the two limiting holes.
6. Device for cleaning and harvesting aquatic plants in the presence of gravel according to claim 1, characterized in that the end of the mounting plate (1-3) is provided with a wedge-shaped shovel head (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211005243.5A CN115299241B (en) | 2022-08-22 | 2022-08-22 | Device for cleaning and harvesting winter-damping aquatic plants under gravel condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211005243.5A CN115299241B (en) | 2022-08-22 | 2022-08-22 | Device for cleaning and harvesting winter-damping aquatic plants under gravel condition |
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| Publication Number | Publication Date |
|---|---|
| CN115299241A CN115299241A (en) | 2022-11-08 |
| CN115299241B true CN115299241B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211005243.5A Active CN115299241B (en) | 2022-08-22 | 2022-08-22 | Device for cleaning and harvesting winter-damping aquatic plants under gravel condition |
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| GB891499A (en) * | 1958-11-12 | 1962-03-14 | Sunbeam Corp | Power operated lawn mower |
| CN2749243Y (en) * | 2004-08-24 | 2006-01-04 | 陈华畅 | Collecting and treating device of hyacinth |
| CN101396015A (en) * | 2008-09-24 | 2009-04-01 | 张琳 | Float grass clearing device |
| CN109348834A (en) * | 2018-08-21 | 2019-02-19 | 南昌工程学院 | A kind of electronic remote-controlled weed cutting machine |
| CN209824450U (en) * | 2018-12-29 | 2019-12-24 | 泰州市力鼎机械设备有限公司 | Aquatic plant cutting, conveying and bundling system and ship |
| CN113748837A (en) * | 2021-09-03 | 2021-12-07 | 天津市水利科学研究院 | Submerged plant harvesting system for river channel |
| CN114875866A (en) * | 2022-04-02 | 2022-08-09 | 开封黄河工程开发有限公司 | Pasture and water cleaning device for hydraulic engineering |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120240543A1 (en) * | 2011-03-25 | 2012-09-27 | Andrews Walter J | Apparatus and method for extracting aquatic weeds |
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2022
- 2022-08-22 CN CN202211005243.5A patent/CN115299241B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB891499A (en) * | 1958-11-12 | 1962-03-14 | Sunbeam Corp | Power operated lawn mower |
| CN2749243Y (en) * | 2004-08-24 | 2006-01-04 | 陈华畅 | Collecting and treating device of hyacinth |
| CN101396015A (en) * | 2008-09-24 | 2009-04-01 | 张琳 | Float grass clearing device |
| CN109348834A (en) * | 2018-08-21 | 2019-02-19 | 南昌工程学院 | A kind of electronic remote-controlled weed cutting machine |
| CN209824450U (en) * | 2018-12-29 | 2019-12-24 | 泰州市力鼎机械设备有限公司 | Aquatic plant cutting, conveying and bundling system and ship |
| CN113748837A (en) * | 2021-09-03 | 2021-12-07 | 天津市水利科学研究院 | Submerged plant harvesting system for river channel |
| CN114875866A (en) * | 2022-04-02 | 2022-08-09 | 开封黄河工程开发有限公司 | Pasture and water cleaning device for hydraulic engineering |
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|---|---|
| CN115299241A (en) | 2022-11-08 |
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