11results about How to "Reduce direct washout" patented technology

The invention discloses a multi-nutrition-level ecological breeding system suitable for freshwater fish breeding, and belongs to the technical field of ecological breeding. The ecological breeding system is provided with a plurality of nutrition levels, the nutrition levels at least comprise a fish nutrition level, a filter-feeding shellfish nutrition level and a benthic organism nutrition level, the ecological breeding system further comprises submerged plants, and the ecological breeding system is characterized in that the bottom layer of the ecological breeding system is the benthic organism nutrition level, and the bottom layer of the ecological breeding system is the filter-feeding shellfish nutrition level. The benthic organism nutrition level comprises ecological concrete and biochar, the biochar provides a habitat for benthic organisms, the ecological concrete provides an activity space for the benthic organisms, and submerged plants are fixed by a porous structure of the ecological concrete. According to the multi-nutrition-level ecological breeding system suitable for freshwater fish breeding, organic matter pollutants and heavy metal in sediments at the water bottom can be effectively removed, the stability of the sediments is improved, and resuspension of the organic matter pollutants, caused by water flow disturbance, of the sediments is reduced.

The invention discloses an artificial fish reef and an artificial fish reef putting method, and belongs to the technical field of water ecological restoration and fishery engineering. The artificial fish reef comprises a reef body, an anchoring structure and a take-up structure. The reef body is of a reinforced concrete frame structure, a bottom plate is closed, other faces are open, protective nets and cross beams are arranged on the side portions, the cross beams are connected through connecting rods, and planting boxes can be installed on the connecting rods. The anchoring structure comprises an anchor hook and an anchor chain, and the take-up structure comprises a take-up box, a take-up roller, a spring and a spring trigger assembly. Through cooperation of the trigger rod and the limiting rod, automatic retracting, releasing and anchoring of the anchor chain are achieved, the structure is stable, installation is convenient and fast, water flow scouring can be effectively reduced, the survival rate of submerged plants is increased, a spawning and inhabiting place is provided for fishes, and the fish gathering effect is remarkably improved.

This utility model relates to the field of building pipeline technology, specifically a wall-penetrating device for leak-proof pipes in building structures. It includes a wall and a pipe. The surface of the wall has a perforation for the pipe to pass through. The surface of the pipe is equipped with a sealing device, which includes an air bladder and a cover. The air bladder is sleeved and connected to the pipe. There are two covers, each sleeved and connected to the pipe. The inner wall of the air bladder has a cavity. An inlet valve and an outlet valve are fixedly connected to the surface of the air bladder. A threaded sleeve is fixedly connected to the surface of the cover. This utility model, by setting up a sealing device, inflates the air bladder through the inlet valve, using its expansion to fill the gap between the pipe and the wall perforation. This sealing method can adapt to various irregular gap shapes and, together with the cover, provides protection. It reduces the need for concrete filling for leak prevention, which leads to inconvenient operation and subsequent disassembly, thus improving overall practicality.

The utility model discloses a reinforcing structure of a riverway embankment, and relates to the technical field of riverway embankments. The concrete cofferdam comprises a concrete cofferdam body, and an installation frame is installed on the top of the concrete cofferdam body. A stepped reinforcing assembly is arranged at the top of the concrete cofferdam and comprises a planting filter screen arranged at the top of the concrete cofferdam and a planting frame fixedly connected to the top of the planting filter screen; a self-adjusting water level blocking assembly is arranged on one side of the planting frame. By means of the planting filter screen and the planting frame in the stepped reinforcing assembly, the surface of the embankment can be covered with planting soil, and green plants can be sown on the surface of the embankment. Growth of green plants can be harmoniously fused with the natural environment, damage to the ecological environment is reduced, water and soil loss can be effectively reduced, a soil protection layer is formed, and therefore the service life of the concrete cofferdam is prolonged, and the height of a lifting floating plate in the self-adjusting type water level blocking assembly can be automatically adjusted according to water level changes.

The utility model relates to a cooling structure, turbulence unit and turbine blade relates to aircraft technical field to solve the problem of turbine blade trailing edge cooling performance is poor, radial distribution uneven in the prior art. The cooling structure of the utility model, including turbulence rib and turbulence column, the periphery of turbulence rib sets at least 2 turbulence columns. The utility model can increase the contact area between turbine blade pressure side wall surface and suction side wall surface, thereby enhancing the pressure -bearing capacity of turbine blade, and promoting structural strength.

The detachable ceramic lining elbow comprises an elbow body, a connecting disc is installed at the water inlet end of the elbow body, installing holes are annularly formed in the surface of the connecting disc, a fastening ring is installed on the surface of the elbow body in a fastening mode, and connecting bases are fixedly installed on the upper side and the lower side of the fastening ring respectively. A vertical plate is installed outside the connecting base, and a connecting plate is fixedly installed at the outer end of the vertical plate. Through the connecting disc and the mounting hole, firm connection with an external pipeline is facilitated, sealing performance and stability are guaranteed, stress is uniform, the positions of the adjusting screw rod and the fixing clamping plate can be flexibly adjusted so that the fixing clamping plate can be clamped on the surface of the external pipeline to be further reinforced, different mounting environments and pipeline layouts can be adapted, and the service life of the pipeline is prolonged. The connecting base and the vertical plate form a stable supporting frame, normal use of the fixing clamping plate is guaranteed, the whole elbow is convenient to disassemble in the later period, and operation is easy.

This utility model discloses a flow metering device for pipe corridors, relating to the field of pipe corridor flow metering technology. It includes a fixed plate connected to the inner wall of the corridor, a fixed ring mounted on the fixed plate, and a Doppler flow meter positioned on the fixed ring. A transmission line is located at the rear end of the Doppler flow meter and connected to a processor. A quick-release mechanism is provided between the fixed ring and the fixed plate. The quick-release mechanism includes a fixed sleeve fixedly connected to the surface of the fixed ring. By pressing a button, the button drives the guide sleeve to move, which in turn drives the guide block to move through a guide groove. The guide block drives the sliding column to rotate, and the sliding column adjusts the locking block to unlock or lock, facilitating quick installation of the fixed ring. The button is embedded in the fixed sleeve, effectively reducing direct water erosion. The use of the locking block and fixed seat for easy fixing avoids structural damage caused by water erosion and extends service life.

The utility model discloses a double-layer combined flue gas distribution volute core, which belongs to the technical field of flue gas distributors and comprises a gas inlet pipe and a double-layer flue gas treatment component mounted in the gas inlet pipe. When the device is used, the replacement assembly arranged on the flow guide plate can drive a first bevel gear and a second bevel gear to be in meshing transmission by rotating a grip in an equipment running state by utilizing a mounting disc, a fixed frame and a magnetic attraction structure, so that quick replacement of a medium block is realized, the tedious operation of stopping, reducing pressure and supplementing a medium is avoided, and the working efficiency is improved. Meanwhile, the fan blades on the inner wall of the mounting frame and the conical mixing cover act synergistically, so that a flue gas flow field is optimized, direct scouring of high-speed airflow to a medium block is reduced, the service life of a medium is prolonged, and the consumption speed is reduced; the equipment does not need to be frequently started and stopped, the mechanical wear of the pipeline and the volute core part is greatly reduced, the maintenance cost of the equipment is effectively reduced, and the efficient, stable and economical operation of the flue gas pretreatment process is realized.

This utility model discloses a three-section structure for the lower mold of a wheel hub mold, including: a lower mold for the wheel hub, a lower mold section body provided on the inner cavity of the lower mold through a mold base, a lower mold section water-cooling insert for the lower mold section body which is fixed with bolts for disassembly and replacement, and a lower mold section cold water insert for the lower mold section which is fixed with screws for disassembly and replacement. Through the independent water-cooling structure of the lower mold section cold water insert, the cooling efficiency of the original weak heat dissipation area can be enhanced, the local temperature can be reduced quickly, and the segmented water cooling makes the temperature distribution of each area more balanced, reducing the thermal deformation of the mold caused by temperature difference and improving the quality of wheel hub forming. The lower mold section two and three both adopt the insert structure fixed with bolts / screws. When a certain section or the easily corroded third section is worn or corroded, it is not necessary to disassemble or replace the entire lower mold, but only to replace the corresponding insert, which greatly reduces maintenance costs and downtime.

This utility model discloses a sealed, wear-resistant, pneumatic quick-opening flap valve, which includes a valve body and a movable flap movably disposed within the valve body. A movable rotating shaft is disposed through the valve body and connected to the valve body via a bearing. One end of the movable flap is fixedly connected to the movable rotating shaft located within the valve body, and one end of the movable rotating shaft is fixedly connected to one end of a rotating arm. The other end of the rotating arm is pivotally connected to the front end of the piston rod of a cylinder. The fixed seat of the cylinder is pivotally connected to the valve body via a fixed shaft. The middle part of the rotating arm is fixedly connected to one end of a counterweight cantilever, and a counterweight block is disposed at the other end of the counterweight cantilever. In this design, the movable flap can be driven by the cylinder to rotate 90° around the center of the movable rotating shaft, thereby realizing the opening and closing of the valve body. The counterweight block can balance the torque of the movable flap, assisting the cylinder in realizing the rapid opening and closing of the valve body. The counterweight block can also provide preload force for the movable flap to ensure the airtightness of the valve body.

This utility model relates to the field of slope protection board technology, and more particularly to a waterproof slope protection board for preventing soil erosion. The technical solution includes a board body, a locking block fixedly disposed on one side of the board body, a limiting insertion hole on one side of the locking block, and a locking groove on the side of the board body away from the locking block; an insertion block disposed on one side of the board body, and a slot on the side of the board body away from the insertion block; a guide groove inside the board body, and a sliding groove on one side of the board body, the sliding groove communicating with the guide groove, and a connecting component for interlocking is disposed inside the guide groove. This utility model enhances the vertical connection constraint, effectively preventing the slope protection board from misaligning or separating vertically when the slope is eroded by rainwater or subjected to gravity, improving the integrity and stability of the slope protection structure, reducing direct erosion of the soil by rainwater, and preventing soil particle loss, thereby effectively curbing soil erosion and protecting the slope ecology.