49 results about "Aquatic weeds" patented technology

The invention relates to the field of agricultural mechanical equipment, in particular to an intelligent aquatic plant harvester for a culture pond, which comprises a floating platform, a harvesting assembly and a first driving assembly connected with the front end of the floating platform, and a second driving assembly connected with the rear end of the floating platform. When the floating platform is in water, the first driving wheel and the second driving wheel can rotate upwards to the water surface and are driven to move through rotation of the paddles; when the robot moves on land or a shallow area on the water side, the first driving wheel and the second driving wheel can rotate downwards to support the floating platform to drive the robot to walk, so that manual carrying is not needed when the robot is transferred or transported on a road, and the labor intensity of workers is greatly reduced.

The utility model relates to the technical field of water body ecological restoration, and particularly discloses a flying saucer type aquatic plant ecological carrier which comprises a containing shell, a soil matrix is stored in the containing shell, the containing shell comprises an upper saucer shell and a lower saucer shell which are fixedly connected, the upper saucer shell and the lower saucer shell are both provided with streamline curved surface structures protruding outwards, and holes are formed in the upper saucer shell. The scheme is used for solving the problems of high labor intensity and low efficiency caused by the fact that a device with small disturbance on bottom mud in the prior art needs to be manually clamped and put down.

The present invention discloses a visual multi-functional aquatic weed harvester and a harvesting method. The visual multi-functional aquatic weed harvester includes a base, a fixing frame is rotatably connected to the base, two symmetrically arranged rotating shafts are rotatably connected to the inner side of the fixing frame, a driving motor is fixedly installed at the rear side of the fixing frame, the output shaft of the driving motor is fixedly connected to the rotating shaft at the right side position, the same transmission net is sleeved on the two rotating shafts, the front end and the rear end of the rotating shaft at the left side position are rotatably connected to the same harvesting seat, and a housing is fixedly installed inside the harvesting seat. In the present invention, by starting the adjusting motor at the front side of the base, the adjusting motor can first unlock the rotating rod and then drive the rotating rod to press down the harvesting seat, and the pressing seat can also maintain a horizontal state to harvest the aquatic weeds underwater, and the situation underwater can also be observed through the camera at the bottom of the harvesting seat.

The utility model discloses a river aeration machine impeller structure, include: vertical motor, the bottom fixed connection of vertical motor has vertical speed reducer, it is characterized by: the top fixed connection of vertical speed reducer has motor stabilizing plate, motor stabilizing plate fixed connection in the back of vertical motor, the bottom fixed connection of vertical speed reducer has the connecting shaft, the bottom of connecting shaft is established with a plurality of accommodation groove, through warning light can utilize the light of own structure and appear to the surrounding personnel warning, prevent personnel approach device, be touched by the inside structure of impeller subassembly and be injured, and impeller subassembly can rotate and agitate water body and greatly increase water - gas contact area and contact time, destroy the air film resistance of water surface, force oxygen to dissolve in water in the meantime, utilize own structure and cut the winding aquatic weeds and other sundries, and with anti - winding component intercombination, utilize own shape and prevent sundries winding.

The invention relates to the technical field of water area treatment equipment, and particularly discloses aquatic plant treatment harvesting equipment based on aquatic plant balance water quality maintenance, the aquatic plant treatment harvesting equipment comprises a mounting frame, the outer end of the mounting frame is fixedly connected with a top ring, the bottom surface of the top ring is fixedly connected with six water level rods, and the six water level rods are arranged around the bottom surface of the top ring at fixed intervals; the bottom of the water level rod is fixedly connected with a top plate. A driving block is arranged to be in an inverted circular truncated cone shape, so that a suction force is generated on water in a connecting pipe when the driving block and a spiral plate rotate, the bottom of the connecting pipe generates a suction force on the water through a cutting cover, the water and aquatic plants are sucked into the connecting pipe, and at the moment, a cutting assembly is driven to rotate along with a driving rod; by means of the mode that the aquatic plants are sucked and stretched for cutting, unified harvesting treatment can be conducted on the long aquatic plants, and other aquatic plants in the ecological environment are prevented from being damaged.

The utility model relates to the technical field of aquatic plant salvaging, in particular to a river regulation aquatic plant collecting and salvaging device which comprises a ship body, a cockpit arranged on the ship body, a first conveying belt installed on the ship body and used for conveying aquatic plants, and a first rotary driver installed on the ship body and used for driving the first conveying belt to convey the aquatic plants. The cutting anti-winding mechanism is arranged on the ship body and used for preventing the aquatic plants from being wound and comprises a butt joint arrangement plate and a plurality of collection rotating pieces arranged on the butt joint arrangement plate and used for collecting and salvaging the aquatic plants; the waterweed collecting and salvaging device for river regulation further comprises a transmission driving mechanism which is arranged on the butt-joint arrangement plate and used for driving the collecting rotating piece to rotate in the forward direction and driving the cutting pieces to rotate in the reverse direction. According to the technical scheme, winding of aquatic plants is avoided through the transmission driving mechanism.

The invention relates to the field of agricultural machinery, in particular to amphibious aquaculture pond aquatic plant cleaning equipment which comprises a floating platform and a harvesting device connected to the end of the floating platform, and the floating platform is connected with a first driving mechanism and a second driving mechanism. The two symmetrical first driving mechanisms are connected to the two sides, close to the harvesting device, of the floating platform correspondingly. The second driving mechanism is connected to the end, away from the harvesting device, of the floating platform. The first driving mechanism is provided with a first adjusting assembly and a first driving wheel; the second driving mechanism is provided with a second adjusting assembly and two coaxial second driving wheels. Through the design of the amphibious driving mechanism, when the amphibious driving mechanism is in water, the first driving wheel and the second driving wheel can be adjusted to move upwards to the water surface, and driving movement is carried out through rotation of paddles; on the land or in a shallow water area, the first driving wheel and the second driving wheel can be adjusted to move downwards, and the tread abuts against the ground to walk on the land.

The utility model relates to the technical field of river channel cleaning, and discloses an aquatic plant dragging and collecting device for water pollution control. The aquatic plant dragging and collecting device for water pollution control comprises a collecting device, an aquatic plant device mechanism is movably installed behind the collecting device, an aquatic plant cutting and fishing mechanism is connected to the lower portion of the collecting device, and the aquatic plant device mechanism comprises a plant containing frame installed behind the collecting device. The grass containing frame is connected to the rear portion of the collecting device, the grass containing frame is movably connected with the collecting device through the fixing rod and the connecting ring, when the grass containing frame moves through the collecting device, the grass containing frame can move in water, the moving grass containing frame can contain water plants floating on the water surface, and the water plants can be collected conveniently. The notch is formed in the front of the grass containing frame, the side opening frames are arranged on the two sides of the notch, the area of the grass containing frame for containing the aquatic plants is enlarged through the side opening frames, the efficiency of fishing the aquatic plants through the grass containing frame is improved, and meanwhile the water surface is kept clean.

The invention provides a water depth detection and control method for adaptively adjusting mowing depth according to underwater topography. The method comprises the following steps: S1, setting an operation route of an unmanned mowing ship in a water surface to-be-operated area; s2, a plurality of point locations are arranged on the operation route in the step S1, data of each point location are recorded, and the data of the point locations comprise coordinates and water depth values of the point locations; s3, at a first point position of the operation path, a cutting knife of the unmanned mowing ship is controlled to descend to a preset initial harvesting depth, and meanwhile, the descending height of the cutting knife is recorded; s4, starting the harvesting device to start aquatic plant harvesting operation, continuously adjusting the height of the cutting knife in the process that the unmanned grass cutting ship advances to the next point position according to the preset path of the operation route, and controlling the advancing speed v of the unmanned grass cutting ship from the point position Pn to the next point position Pn + 1, so that the height adjustment of h can be realized when the cutting knife reaches the next point position Pn + 1, and the descending height of the cutting knife at the next point position is recorded, so that the harvesting depth is adaptively adjusted according to the water depth.

The utility model relates to the technical field of aquatic plant harvesting and conveying, in particular to an aquatic plant harvesting and conveying device which comprises two protective baffles, a conveying structure is arranged between the two protective baffles, and the conveying structure comprises a first conveying belt structure, a conveying net structure and a second conveying belt structure. Two pressing rollers are rotationally arranged between the two protective baffles and located above the conveying net structure, one ends of the two pressing rollers penetrate through the protective baffles to be fixedly provided with belt wheels, the belt wheels are sleeved with transmission belts, telescopic rods are rotationally arranged on the side faces of one ends of the two protective baffles, and one ends of the telescopic rods are hinged to connecting frames; the bottom end of the connecting frame is hinged to one side of the protective baffle, and conveying rollers are rotationally arranged on one side of the connecting frame. The problems that an existing mowing boat cannot well filter water of fished aquatic plants and cannot well fished the aquatic plants are solved.

This utility model relates to the field of aquatic weed harvester technology and discloses a small, quickly detachable boat-type aquatic weed harvester, including a bow plate. Two rotating paddles are installed at one end of the bow plate, and mounting grooves are formed inside the rotating paddles. A mounting connecting rod is installed inside the mounting grooves. This quickly detachable small boat-type aquatic weed harvester allows for rapid disassembly and assembly of the harvesting components, greatly improving the efficiency and ease of maintenance of the aquatic weed harvester. In actual operation, operators can quickly disassemble and assemble the harvesting components with simple operations, without the need for complex tools or lengthy processes. This design not only saves time but also reduces the difficulty of operation, allowing even non-professionals to easily learn how to use it. Furthermore, the quick disassembly and assembly design also helps to quickly replace damaged parts in emergency situations, ensuring the continuous and efficient operation of the aquatic weed harvester.

The utility model discloses a biological multi-habitat mutual aid farmland ecological system, which relates to the field of farmland ecology, solves the problem that the growth of rice seedlings is influenced by the equipartition of the existing common farmland fertilizer, and adopts the following scheme that the biological multi-habitat mutual aid farmland ecological system comprises a main field area, the inner side space of the main field area is divided into a planting area and an external area by four groups of partition ridges; the external area is arranged on the inner side of the partition ridge; according to the biological multi-habitat mutual aid farmland ecological system, the external area and the planting area are arranged on the inner side of the main field area, rice seedlings and aquatic weeds can be planted in a separated mode, fishes in the external area gnaw the aquatic weeds and plankton to grow, and generated fertilizer and excrement swim into the planting area in a water body; in cooperation with breeding of eels or crayfishes, soil and fertilizer in the planting soil part can be turned over, water and ecological fertilizer are supplied to rice seedlings to the maximum extent, and the growth state of the rice seedlings is guaranteed.

The utility model discloses a waterweed cleaning device for river regulation, which comprises a device main body, floating bridges fixedly connected to two sides of the device main body, controllable air sprayers fixedly connected to the other ends of the floating bridges, a collecting box fixedly connected in the device main body, an opening arranged on the device main body on the front side of the collecting box, and a rolling shaft arranged in the opening. A feeding port is formed in the front side of the collecting box, a second cleaning rod is fixedly connected to the bottom in the feeding port, a conveying belt is arranged between the feeding port and the opening, a first rotating shaft is in transmission connection with the conveying belt located at one end in the feeding port, and the two ends of the first rotating shaft are rotationally connected with the collecting box; the two ends of the second rotating shaft are rotationally connected with the device body, and the periphery of the conveying belt is fixedly connected with a first cleaning rod. By means of the structure, the problem that the cleaning efficiency is reduced due to the fact that aquatic plants are prone to being wound on the rake teeth in the cleaning process is solved.

The utility model provides an open-close type ship side thruster grating which comprises an installation frame and a plurality of grating blades, rotating shafts in the same direction are fixed to the middles of the grating blades, the two ends of each rotating shaft are rotationally connected with the installation frame, the open-close type ship side thruster grating further comprises a control assembly working synchronously with a propeller, and the control assembly controls rotation of the grating blades. According to the side thruster, when the side thruster works, the grating blades rotate and open the end of the pipeline, so that water flow can enter and exit normally, and the side thrusting effect is achieved; when the ship runs normally, the grating blades rotate and seal the two ends of the pipeline. In this way, sundries such as ropes, plastic garbage and aquatic plants encountered by the ship in the running process cannot enter the pipeline through the grating structure to be wound on the propeller, and normal work of the propeller is guaranteed. Meanwhile, no cavity structure exists at the position of the ship bow to influence the water flow direction, so that no extra resistance is generated, the ship propulsion efficiency is prevented from being reduced, and correspondingly, the oil consumption can be prevented from being increased.

The utility model belongs to the field of ecological treatment, and particularly relates to an ecological treatment device for inhibiting overgrowth of aquatic plants, which comprises a base, the top of the base is movably connected with a water tank, two sides of the top of the water tank are fixedly connected with a support block and an adjusting mechanism respectively, and the bottoms of two sides of the water tank are fixedly connected with limiting components. Supporting shells are fixedly connected to the front side and the rear side of the top of the supporting block correspondingly, an adjusting block is movably connected to an inner cavity of each supporting shell, a spray head and an adjusting frame are fixedly connected to the two sides of each adjusting block correspondingly, and a water pump is fixedly connected to the left side of each supporting block; by arranging the adjusting mechanism, the spray head can be driven to swing up and down in a reciprocating mode to adjust the angle, so that the spraying range of the spray head can be increased, by arranging the limiting assembly, the water tank can be limited after the angle of the water tank is adjusted by rotating the water tank, the spraying range of the spray head can be increased in multiple directions, and pesticide can be sprayed to aquatic plants in different ranges; and growth of aquatic plants is inhibited.

Water hyacinth (Echhornia Crassipes) is an aquatic plant known as one of the most important and dangerous aquatic weeds globally. This plant has significant effects on the ecosystem and aquatic environment, causing disruptions in sea transportation and sometimes leading to the destruction of aquatic life in its habitat. Water hyacinth has led to pollution of geographical areas in many countries, recognized as an environmental problem that disrupts the food cycle, water quality, and marine industries. The destructive effects of this plant are so severe that some sociologists consider it a key factor in poverty and hindering the development of countries and the planet. Each water hyacinth plant produces about 1 liter of water waste daily, posing a serious threat to the world's fresh water resources due the millions of plants worldwide. Until today, various chemical, biological and mechanical solutions have been utilized to control this invasive plant. These strategies have not had a significant impact in some geographical areas, or on the contrary, they have had harmful effects (such as the effects of using strong herbicides) on the environment and aquatic ecosystems. Notably, many solutions have not effectively targeted the abundant and resilient seeds of water hyacinth. By utilizing biological signaling (biological messages) to promote bacterial symbiosis in water hyacinth for nitrogen fixation from the atmosphere, and spraying a solution without herbicides or strong poisons, with the aim of establishing the cycle of nitrogen fixation in the plant by inhibiting growth and or the effect on the bacterial symbiotic species in water hyacinth, the production of seeds in the plant is very little and even stopped, as well as the effects of decline and acceleration of the aging process of water hyacinth and the destruction of the plant appear. As a result, we will witness a decrease in the plant population, decrease in growth and reproduction, a significant decrease in water consumption, and a decrease in the quality of the biological tissues of the plant as a result of limiting the resources created for the water hyacinth plant. According to the investigation and study of the effects of this method on micro-organisms and macro-organisms in the water and its margins, it seems that this innovative solution by targeting the fixation of nitrogen from the air and disruption of symbiosis in water hyacinth has a significant effect and the lowest environmental risk compared to other methods.

The present invention provides a water weed cleaning device for a gate of a water conservancy project, and relates to the field of water conservancy projects. The water weed cleaning device for a gate of a water conservancy project comprises a carrier frame, wherein the bottom end of the carrier frame is fixedly connected to a fixed frame, a gate is inserted inside the fixed frame, a lifting rod is inserted at the top of the gate, the top of the lifting rod passes through the carrier frame, the top of the lifting rod is located above the carrier frame and is fixedly connected to a power gear, a telescopic rod is inlaid on the inner wall of the carrier frame, a pulling frame is fixedly connected to the rear end of the telescopic rod, a roller is rotatably connected to the front of the pulling frame away from the end of the telescopic rod, and a recovery motor is fixedly connected to the top of the rear end of the carrier frame. When the water weed cleaning device for a gate of a water conservancy project is in use, the recovery motor drives the pull rope to reel in through the reel rod, the pull rope drives the connecting frame to move up, the connecting frame drives the sliding rod to move up, the sliding rod drives the top rod to rotate under the action of the gravity of the moving frame, the top rod drives the stop rod to rotate, the stop rod limits the entangled water weeds, and has the advantage of fixing the water weeds.

The invention discloses an aquatic plant cleaning device and measuring system for an unmanned ship, and the device comprises a ship body, the head of the ship body is sharp and is used for enabling a substance at the head of the ship body to move towards the two sides of the ship body in the advancing process of the ship body, and the tail of the ship body is provided with a connecting part which is used for being connected with the unmanned ship; the grass stirring parts are arranged on the two sides of the ship body and used for stirring the aquatic plants on the two sides of the ship body backwards; the cutting part is arranged at the head of the ship body and used for cutting the aquatic plants located at the head of the ship body in the vertical direction, and the cut aquatic plants can move towards the two sides of the ship body in the ship body entering process. Compared with an existing manual cleaning and trash cleaning boat or aquatic plant harvesting boat, the device can be used in cooperation with the unmanned ship, is simple in structure, low in cost, light and flexible to use and capable of achieving rapid passing of the unmanned ship.

The utility model discloses an aquatic plant pruning tool capable of controlling pruning depth, which comprises a base, a supporting seat is arranged below the base, a fixing pin is arranged above the base, a driving motor is arranged on the right side of the fixing pin, a collecting box is arranged on the right side of the driving motor, and a water suction pump is arranged on the right side of the collecting box. And a filtering shell is arranged in the collecting box. By means of the structure, the problems that when a traditional aquatic plant pruning tool is used for pruning aquatic plants, workers often need to conduct manual pruning, and due to the fact that the pruning tool is heavy, the labor intensity of the workers is too large are solved, and the problems that the safety of the workers cannot be guaranteed, and when manual pruning is conducted, the labor intensity of the workers is too large are avoided. And because the trimming height cannot be judged, the aquatic plants are uneven, and the attractiveness of the water body is influenced.

The invention relates to the technical field of water surface cleaning, and discloses a water surface aquatic plant garbage automatic collecting device based on a transmission system, the device comprises a base, a first support frame and a second support frame located in the first support frame are arranged on the two sides of the base in the length direction, a top plate is arranged at the top end, and a middle opening groove and the interior of the second support frame jointly form a connecting channel; a first driving mechanism with two ends longer than the channel is arranged in the connecting channel; a second driving mechanism connected with the base through a connecting plate is arranged above one end of the first driving mechanism, and a third driving mechanism fixedly connected with the first driving mechanism is arranged at the other end of the first driving mechanism; and a control mechanism electrically connected with the three driving mechanisms respectively is arranged above the top plate. The stable main body is formed by the multiple supporting frames, the first driving mechanism in the connecting channel and the second driving mechanism and the third driving mechanism at the two ends are matched, the control mechanism works cooperatively, automatic collection and treatment of water surface aquatic plant garbage are achieved, the structure is stable, and all components cooperate efficiently.

The utility model provides a lake aquatic plant management observation device, which relates to the technical field of aquatic plant cultivation and comprises a shell, a connecting block and a fixing rod. A square hole is formed in the front end of the shell, a movable door plate is connected into the square hole in the front end of the shell, the lower end of the shell is connected with a connecting support, the left end and the right end of the connecting support are connected with inflatable floating mats, the connecting block is arranged on the rear side of the lower end of the shell, and two sets of round holes are formed in the connecting block. Protective nets are connected to the front sides and the rear sides of the interiors of the two sets of round holes in the connecting block, the two sets of fixing rods are arranged in the shell, threaded holes are formed in the fixing rods, connecting rods are clamped in the threaded holes in the fixing rods, connecting pieces are connected to the lower ends of the two sets of connecting rods, and a turbine fan is connected to a motor shaft of a motor in a first sealing motor box. Subsequent sampling and observation of aquatic plants deep in the lake are facilitated, and the problem that roots of the aquatic plants are easily damaged when an existing lake aquatic plant management and observation device samples and observes the aquatic plants is solved.

The utility model relates to the technical field of water body maintenance, and discloses an ecological treatment device for controlling overgrowth of aquatic plants, which comprises a limiting net frame part and a buoyancy frame part, telescopic adjusting arms connected with buoy pieces are arranged on two sides of a frame ring end, a net bag piece is hooked at the lower end of the frame ring end, the device is placed in water, the buoy pieces provide buoyancy, and the floating frame part is connected with the net bag piece. Submerged plants in an area are enclosed in the net bag piece, herbivorous fishes are put into the net bag piece to be cultured, grass carps and other herbivorous fishes have a strong ingestion effect and can consume a large number of submerged plants, so that excessive propagation of the submerged plants is controlled, the submerged plants are effectively controlled, manual treatment is not needed, and the cost is reduced. And economic benefits can be brought to cultivation of herbivorous fishes.

The present invention relates to the technical field of aquatic weed removal, and discloses an underwater fixed-point aquatic weed removal device, comprising a hull, floating on the water surface; a plucking assembly, comprising a support plate and a plurality of plucking members, the support plate being mounted on the hull via a support frame, the support plate being provided with a plurality of through holes along the circumference, the plurality of plucking members being respectively arranged in the plurality of through holes, the bottom ends of the plucking members extending underwater and provided with plucking heads, the plucking heads being used to wrap around and plucking the aquatic weeds; a protective assembly, comprising a plurality of protective tubes and a plurality of filter members, the protective tubes being sleeved on the plucking members, the filter members being provided at the bottom ends of the protective tubes, the protective tubes being provided with a toggle member, and when the plucking members move upward, the toggle member drives the plurality of filter members to block the bottom ends of the protective tubes, and the filter members filter the sediment in the water. The present invention is easy to operate, achieves the plucking of aquatic weeds, and improves the overall plucking efficiency.

The invention relates to an aquatic plant cleaning and salvaging ship. The aquatic plant cleaning and salvaging ship comprises a ship body, a salvaging device, an adjusting and supporting device, a driving device and a front cutting device. The salvage device is arranged in the middle of the ship body and is used for collecting, cutting and crushing the aquatic plants cut by the front cutting device and conveying the cut and crushed aquatic plants into the ship body; the adjusting and supporting device is provided with two adjusting and supporting frames, and the two adjusting and supporting frames are fixed to the two sides of the lower portion of the ship body correspondingly and used for adjusting the height of the ship body relative to the water surface; the driving device is fixedly connected with the adjusting supporting frame and used for driving the ship body to move; the front cutting device is provided with cutters, and the cutters are fixed to the front end and the rear end of the adjusting supporting frame and used for preliminarily cutting the aquatic plants. Based on the scheme, it is ensured that the fishing device and the cutting device are located at the optimal positions all the time, so that different water area environments are adapted, and cleaning efficiency is improved.

The invention discloses an aquatic plant cleaning device for urban landscape rivers and lakes, comprising a hull, a propeller assembly mounted at the tail of the hull, a cutting assembly mounted at the front end in the hull, a filter system arranged in the center in the hull, and a support frame mounted at the top of the filter system. A supporting frame is installed on the inner right wall of the ship body, an extrusion assembly is arranged in the supporting frame, a horizontal pushing air cylinder is installed on the inner right wall of the ship body, a pushing plate is installed at the output end of the pushing air cylinder, an anti-collision assembly is installed at the bottom of the front end of the ship body, and a storage battery and a signal receiving and control unit are installed in the ship body. According to the device, aquatic plants on different horizontal planes can be cut and collected, the situation that the aquatic plants are too long to wind around the cutting assembly is avoided, the aquatic plant cleaning efficiency is improved, meanwhile, the cut aquatic plants are dewatered and extruded into blocks, and the aquatic plants are convenient to carry.

Products and methods related to the enhancement of efficacy of algaecides and / or aquatic herbicides using metallic trivalent cations, as well as the reduction in ecotoxicity and non-target effects and preservation of water quality. Some embodiments advantageously provide the benefit of binding phosphorus, but allow for a substantial reduction in the dissolved trivalent metal and an increased ability to target the main source of future phosphorus release. In one aspect of an embodiment, a trivalent cation delivery system includes a commonly available commodity that can be simultaneously added to the water or mixed in a tank prior to the application, avoiding the need for an industrial process to cohere the components. In another aspect of the embodiment, the trivalent cation delivery system may be accomplished by the use of an algaecide and / or aquatic herbicide prior to the application of the phosphorus binding metal.

The purpose of this invention is to provide a raw material pretreatment and impurity removal device for the production of sludge sintered bricks. This device pre-screens plant stems or aquatic weeds before crushing, preventing them from entering the sludge sintered bricks after crushing. This improves the internal structural consistency and strength of the sludge sintered bricks, thus enhancing product quality. The device comprises a hollow outer shell. Within the internal cavity, from top to bottom, are arranged a preliminary filtration and impurity removal device, a guide plate, and a post-screening device. The preliminary filtration and impurity removal device includes a filtering and screening roller that rotates around a fixed central axis. The filtering and screening roller is hollow inside and open at one end. The outer wall of the filtering and screening roller is formed by a layer of filter screen material, which confines impurities from the sludge raw material entering the filtering and screening roller to its interior.

The invention relates to the technical field of aquatic plant fishing, in particular to an aquatic plant cleaning device for municipal water conservancy. The invention provides an aquatic plant cleaning device for municipal water conservancy for preventing aquatic plants from slipping off. An aquatic plant cleaning device for municipal water conservancy comprises a salvage rake, a winding mechanism and a clamping mechanism, the lower portion of the salvage rake is provided with the winding mechanism used for assisting in pulling apart aquatic plants and winding the aquatic plants on the salvage rake, and the lower portion of the salvage rake is provided with the clamping mechanism used for clamping the aquatic plants hung on the salvage rake. A synchronizing mechanism used for enabling the winding mechanism to automatically pull the aquatic plants apart and wind the aquatic plants on the fishing rake is arranged between the clamping mechanism and the winding mechanism. The pressing rod assists in pulling the aquatic plants apart and winding the aquatic plants on the fishing rake, the aquatic plants hung on the fishing rake are clamped through the clamping rod, and the fished aquatic plants are prevented from slipping off due to loose winding.

The utility model relates to the technical field of hydraulic engineering, and discloses a dam with an efficient drainage structure, which comprises a dam body, a sliding chute is arranged on the inner wall of the dam body, a filter screen is slidably connected to the inner wall of the sliding chute, and the left side and the right side of the inner wall of the sliding chute are connected with the top of the filter screen through limiting components so as to limit the filter screen. Four reinforcing pipes are fixedly connected to the rear side of the dam body, four connecting rods are rotationally connected to the left side and the right side of the outer wall of each reinforcing pipe, the outer walls of the connecting rods are connected with the inner walls of the reinforcing pipes through adjusting assemblies so that the connecting rods can rotate, and reinforcing sliding blocks are fixedly connected to the outer walls of the connecting rods. According to the utility model, garbage such as fallen leaves, aquatic plants and the like in water flow is blocked by the filter screen during water drainage, the garbage is fished after water drainage is completed, and when the filter screen needs to be maintained, the adjustment crank is rotated to unfasten the fixation of the filter screen, and the filter screen is taken down to be maintained.

The utility model discloses a weeding device of a weeding boat, which comprises a transmission shaft arranged at the front end of a boat body and a rotary cutter fixedly arranged on the transmission shaft, the surface of the transmission shaft is movably sleeved with at least two mounting seats fixedly arranged at the front end of the boat body, and the mounting seats comprise standard seats and lengthened seats. The two adjacent rotary cutters are arranged in a front-back staggered mode through the standard bases and the lengthened bases, and positioning cutters are installed between the installation bases and the rotary cutters. The rotary cutters rotate at a high speed to cut aquatic plants and are matched with the positioning cutters and the driven blades to shear the aquatic plants, when the rotary cutters shear hard objects, the driven blades are extruded in the circumferential direction to rotate around the transmission shaft in a small range, and the hard objects can conveniently penetrate through the gaps; the rotary blades can be conveniently inserted into aquatic plants accumulated on the water surface in sequence in time, the aquatic plants are prevented from being accumulated together, the rotary blades cannot be inserted into the aquatic plants, and the aquatic plants are pushed by the weeding boat to run, so that the weeding efficiency is improved.