46results about How to "Prevent fluttering" patented technology

The utility model discloses a polishing device for a stator blade of a gas compressor, and relates to the technical field of blade polishing. The compressor stator blade polishing device comprises a machining table and a mounting plate, two collecting grooves penetrate through the machining table, a first dust suction pipe of an annular structure is mounted on the outer side of the mounting plate through a pipe hoop, a plurality of first dust suction nozzles are mounted on the first dust suction pipe, and a reciprocating lead screw is mounted on one side of the surface of the machining table through a fixing plate; a scraper is arranged on one side of the reciprocating lead screw, a brush is arranged at the bottom of the scraper and matched with the upper surface of the machining table, a second dust suction pipe of a U-shaped structure is installed at the top of the scraper through a pipe hoop, a plurality of second dust suction nozzles are installed on the second dust suction pipe, connecting blocks are fixed to the two ends of the scraper, and the reciprocating lead screw is in threaded fit with the connecting block on the right side and combined with the scraper. And the front-back reciprocating motion of the brush is conveniently adjusted, dust accumulated on the machining table is pushed to the direction of the collecting groove, the second dust suction nozzle is matched, dust raised in the pushing process is adsorbed, and dust flying is avoided.

The invention belongs to the technical field of Carnot battery energy storage, and particularly relates to a low-steam reactive three-cylinder series operation system of a Carnot battery unit and a working method of the low-steam reactive three-cylinder series operation system. Comprising a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder which are sequentially connected, in the working state, blades in the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder rotate highly and release a large amount of heat energy, cooling steam is introduced into the high-pressure cylinder at the moment, the cooling steam sequentially flows through the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder, and the cooling steam is cooled. And friction blast heat can be taken away, so that stable temperature distribution of a through-flow part is maintained, meanwhile, flutter and water erosion of the blades are avoided, and the economical efficiency and the safety of operation of the Carnot battery unit are guaranteed.

The invention discloses a robot milling posture optimization method based on a main stiffness difference value, and belongs to the field of robot milling. The method comprises the following steps: carrying out equidistant dispersion division on a milling track of a robot, and numbering each track point; calculating a tool nose point rigidity ellipsoid of the robot in a posture corresponding to the specific redundant angle at each processing track point; the point stiffness ellipsoid of the tool nose is projected to a milling plane, and the main stiffness difference PSD of the robot is obtained; and with the maximum sum of the main stiffness differences PSD corresponding to all the machining track points as an optimization target, traversing the optimal redundancy angles of all the track points under the constraints of physical interference, flexible space and joint speed, and solving the optimal robot milling posture. According to the invention, the whole milling process is carried out stably, and modal coupling flutter is avoided.

The utility model relates to the field of polishing devices, in particular to a green building material environment-friendly polishing device with a dust suppression mechanism. According to the technical problems, a water mist spraying mode is adopted for dust falling, sewage can be generated in the water mist spraying mode, waste of water resources is caused, dust can be mixed with water, the dust is attached to building materials, and sanitation is affected; according to the technical scheme, the environment-friendly building material polishing device with the dust suppression mechanism comprises an air inlet assembly, an air outlet assembly and a filtering assembly; compared with the prior art that a water mist spraying mode is adopted for dust falling, the water mist spraying mode can generate sewage, waste of water resources is caused, dust can adhere to building materials, and sanitation is affected; according to the polishing device, through cooperative use of the air inlet assembly and the air outlet assembly, dust can be taken away and collected through airflow, so that the effects of preventing dust from flying and reducing dust are achieved, water mist does not need to be sprayed, water resources are saved, and dust treatment is cleaner.

The utility model discloses a yarn arranging device for polyester textile yarn production, which comprises a base, and a yarn arranging roller is mounted on the left side of the base; a containing groove is fixed to the left side of the top of the base, the containing groove is parallel to the wire arranging roller, a limiting rod is slidably connected to the interior of the containing groove, a first spring is connected to the bottom of the limiting rod, and the bottom of the first spring is connected to the interior of the containing groove; a motor is arranged on the right side of the base, the left end of the motor is in key connection with a cam, the rear end of the cam is attached to the front end of a cleaning plate to form an extrusion mechanism, and the cleaning plate is slidably connected to the base. The yarn arranging device for polyester spinning yarn production is provided with the cam, the cam is driven by the motor to rotate, the cam rotates to drive the cleaning plate to transversely shake, then the cleaning plate shakes to clean dust attached to polyester spinning yarns, and therefore the cleaning effect is improved.

The utility model relates to the technical field of flour mills, and discloses a hammer type flour mill which comprises a machine body, a flour milling chamber and a collecting chamber are arranged in the machine body, a discharging port is arranged between the flour milling chamber and the collecting chamber in a communicating mode, a plurality of milling teeth are arranged on the inner wall of the flour milling chamber in an array mode, a rotating shaft is arranged in the flour milling chamber in a rotating mode, and a motor is fixedly arranged on the outer wall of the machine body and connected with one end of the rotating shaft. Each hammering assembly comprises a plurality of sleeves fixedly arranged on the rotating shaft, hammer rods are slidably inserted into the sleeves, sliding plates are arranged at the ends, located in the sleeves, of the hammer rods, hammer heads are fixedly arranged at the other ends of the hammer rods, a plurality of positioning holes are formed in the sleeves in an up-and-down symmetrical mode, and positioning grooves are formed in the sliding plates. The sliding plate penetrates through the positioning hole through a fixing bolt and is inserted into the positioning groove to be fixedly connected with the sleeve. The hammer rod can be adjusted in the sleeve in a sliding mode, so that the distance between the hammer head and the grinding teeth is changed, the device can adapt to material grinding under different hardness and humidity conditions, and the grinding efficiency is improved.

The utility model discloses a stone infrared big cutting machine with an improved flushing device, which comprises a big cutting machine body and a flushing device, the big cutting machine body comprises a dustproof wall surface, the top of the dustproof wall surface is provided with a slidable moving rod, the slidable moving rod is provided with a first sliding rail, the first sliding rail is provided with a movable sliding block, and the flushing device is arranged on the movable sliding block. The movable sliding block is provided with a cutting tool bit assembly, the flushing device comprises a water tank, a flushing cover and flushing sprayers, the flushing cover covers the cutting tool bit assembly, a water flowing through hole is formed in the inner side of the flushing cover, and the flushing sprayers are arranged on the two sides of the flushing cover. Through the first sliding rail, the second sliding rail and the third sliding rail, the tool bit cutting assembly can move front and back, left and right and up and down; flushing nozzles are arranged on the left side and the right side of a flushing cover, water is sprayed to the cutting position during cutting, and lime is prevented from flying; the spraying head is arranged on the upper portion of the dustproof wall face and sprays out lime, and meanwhile the blower is arranged on the dustproof cover plate and can blow the lime downwards. The utility model can effectively prevent lime pollution.

The utility model relates to nitrogen seal valve technical field, concretely for a kind of high-performance stable opening and closing nitrogen seal valve, including valve body, valve cover, valve rod, valve seat, valve flap and actuating mechanism, valve rod includes upper valve rod and lower valve rod, by setting up middle cavity sealing mechanism in upper and lower valve rod connecting part, double sealing guarantee is provided for actuating mechanism, when the sliding seal of valve rod and actuating mechanism appears wear and causes sealing failure, sealing diaphragm still can guarantee sealing effect, make lower membrane chamber be in stable operation state, guarantee the normal operation of actuating mechanism;Lower spring is set at bottom cover, by the collaborative work of lower spring and upper spring, make valve rod produce more linear, more accurate displacement response to slight pressure change, to improve overall control precision, make valve operation more stable.

The utility model discloses a construction waste collecting box and transfer device, which comprises a construction waste collecting carriage and further comprises transmission parts arranged on the two sides of the construction waste collecting carriage, an upper cover plate used for covering the construction waste collecting carriage is rotatably arranged between the side walls of the transmission parts, and a spraying box is fixed on the surface of the upper cover plate. A rear baffle is installed between the side walls of the construction waste collecting compartment. According to the construction waste transfer trolley, construction waste can be loaded conveniently, the construction waste can be transferred in a closed mode during transportation, the cleanliness degree is high during construction waste transfer, and dust raising is avoided.

The utility model discloses a drilling dust removal mechanism for aluminum substrate processing, which relates to the technical field of aluminum substrate processing and comprises a bearing plate, a hydraulic cylinder is fixedly mounted in the middle of the top of the bearing plate, a piston rod is arranged at the extension end of the hydraulic cylinder, and an extension column is fixedly mounted at the other end of the piston rod. And dust collection units are arranged on the two sides of the top of the bearing plate correspondingly, and dustproof units are arranged on the outer surfaces of the extension columns. The dustproof cover moves downwards along with the extension column, firstly makes contact with the aluminum substrate, continuously moves downwards to be extruded to slide on the outer surface of the extension column to move upwards, and extrudes the reset spring till the drill bit makes contact with the aluminum substrate for drilling. Under the elastic reverse pushing force of the reset spring, the bottom end of the dust cover is always attached to the top of the aluminum substrate and located on the periphery of the drill bit, powder generated during drilling can be covered with the dust cover and prevented from flying outwards, and then the quality of the surrounding environment is improved.

The utility model discloses a mirabilitum dehydratum screening device capable of improving screening efficiency. The mirabilitum dehydratum screening device comprises a screening tank; the feeding hopper is connected to the upper end of the screening tank; the dust recycling assembly is arranged outside the feeding hopper; an opening of the material screening concave box faces downwards, the material screening concave box is arranged in the screening tank, a feeding hose communicates between the feeding hopper and the material screening concave box, and the two sides of the lower end of the material screening concave box are both covered with screening net plates; and the material screening driving assembly is arranged outside the material screening concave box. The screening device is beneficial for effectively preventing dust from directly flying into the air, is also beneficial for timely recycling the dust of the mirabilitum dehydratum, effectively reduces the waste of the mirabilitum dehydratum, and is beneficial for driving the screening concave box and the screening net plate to swing left and right through the work of the screening driving assembly, so that the screening net plate is beneficial for swinging and screening the mirabilitum dehydratum, and the screening efficiency is improved. And the screening efficiency of the mirabilitum dehydratum is effectively improved.

A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

The invention discloses a drying device for PP bamboo fiber production and a drying process thereof, and relates to the field of PP bamboo fiber production.The drying device comprises a device body, a drying assembly is installed on the left side of the device body, a baffle is installed on the right side of the device body, and a tensioning adjusting frame is movably connected to the left side of the baffle; a tensioning roller is installed in an inner cavity of the tensioning adjusting frame, a driving assembly is installed at one end of the outer wall of the device body, a sealing disc is installed at the other end of the outer wall of the device body, a winding roller is rotationally connected to the center of the interior of the inner cavity of the device body, a positioning assembly is movably connected to the top of the winding roller, and an extrusion disc is movably connected to the bottom of the winding roller. An extrusion assembly is installed in the center of the top of the device body, and extrusion plates are symmetrically and movably connected to the two sides of an inner cavity of the extrusion assembly. According to the drying device for PP bamboo fiber production and the drying process of the drying device, the drying efficiency of bamboo fibers can be effectively improved, and meanwhile feeding and discharging treatment can be conveniently conducted on the device.

The present invention discloses a multi-point measurement type optical film thickness gauge, including a base, a movable plate, a magnetic sheet, a spring, a dust suction mechanism and an intermittent transmission mechanism, wherein a fixed cover is fixedly connected to the base, and a detection head is installed in the fixed cover, a support seat is fixedly arranged on the upper surface of the base, and one end of the support seat extends below the fixed cover, and a movable cover spliced ​​with the fixed cover is arranged above the other end of the support seat, a groove is arranged on the lower surface of the support seat, and sliding grooves are arranged on both sides of the groove, and two ends of the sliding blocks are respectively slidably connected to the two sliding grooves, the sliding block is coaxially penetrated by the limiting shaft, and the inner end of the limiting shaft is coaxially fixed with a driving block, and the threaded upper protrusion of the lower end of the driving block is penetrated by a screw rod, and one end of the screw rod is connected to the groove with a bearing. The invention can not only ensure the effect of dust suction, but also can uniformly detect optical films at multiple points, thereby improving the accuracy of measurement.

The utility model relates to an air flow guiding technology in a steam reformer, in particular to a guide plate structure for a preheated air duct of the steam reformer, which comprises a plate body, and the thickness from the head of the plate body to the tail of the plate body is gradually reduced. The plate body is provided with a plurality of differential pressure holes communicated with the two side faces of the plate body, and the tail of the plate body is further connected with a plurality of tooth-shaped tail edges. Through the improvement of the plate body structure, the gradual change of the thickness and the fluctuating structure of the side surface of the plate body, a streamline structure fitting airflow flowing is formed, and the airflow resistance can be reduced in the actual working process, so that friction and noise are reduced; the pressure difference between the two side surfaces is improved through the pressure difference holes, flutter of the plate body is avoided, disturbance of the plate body to airflow is reduced, and energy consumption is reduced.

The utility model discloses a paper conveying guide mechanism of printing machine belongs to printing mechanical technical field. The utility model adopts technical scheme, a kind of paper conveying guide mechanism of printing machine, including the guide paper wheel subassembly of being set to the paper conveying outlet of printing machine, and the regulating assembly for adjusting the position of guide wheel subassembly is equipped with on the outside of printing machine paper transmission outlet, the guide paper wheel subassembly includes wheel seat, the wheel frame is rotatably connected with the lower end of wheel seat, the wheel piece is equipped in wheel frame end, and the pressure regulating mechanism for adjusting the normal pressure of wheel piece and paper surface is equipped on wheel seat;The utility model is through the cooperation of guide paper wheel subassembly, regulating assembly and pressure regulating mechanism, realize the quick and accurate adjustment of guide paper wheel position and normal pressure, with the advantage that the normal pressure of guide paper wheel and paper surface can be conveniently and accurately adjusted, avoid the paper deformation caused by excessive pressure or the paper floating caused by too small pressure.

The utility model discloses an environmental protection device and a closed type coal conveying belt dust removal device thereof, and relates to the technical field of environmental protection equipment, and the closed type coal conveying belt dust removal device comprises an anti-dissipation channel arranged along the running direction of a coal conveying belt, the anti-dissipation channel comprises two vertical plates arranged on the two sides of the coal conveying belt and a horizontal top plate horizontally arranged above the two vertical plates. The horizontal top plate is provided with an opening used for penetrating through the dust collection channel, and one end of the dust collection channel is communicated with the opening; and the other end of the dust collection channel is communicated with the dust collection device, and the dust collection device is used for sucking the coal dust in the dissipation prevention channel into the dust collection channel and filtering the coal dust. The device can effectively reduce coal dust which is generated when the coal feeder works and floats in the air, and pollution of the coal dust to the environment is reduced.

The utility model relates to the technical field of cigarette machine equipment, in particular to an opening stabilizing device for cigarette filter tows. The device comprises a rack in which tows can be placed, and an opening assembly mounted at the top of the rack, the opening assembly comprises a base plate, a pressing roller, a driving roller and a motor, the base plate is vertically installed on the top of the rack, the pressing roller and the driving roller are installed on the side wall of the same side of the base plate in parallel, and a gap allowing tows to penetrate through is formed between the driving roller and the pressing roller; the motor is installed on the side wall of the other side of the base plate, and an output shaft of the motor penetrates through the base plate to be connected with the driving roller so that the driving roller and the pressing roller can press and open the tows. The draw resistance opening device is simple in structure, the operation method is simple and rapid, the situations of filament breaking, filament flying and the like of filament bundles can be effectively avoided through the opening assembly, and draw resistance fluctuation and the standard value of draw resistance are more stable.

The utility model relates to the technical field of electric power overhaul, in particular to a dust removal mechanism for operation and maintenance of a transformer substation. Comprising a dedusting body, a sponge mat and a dust collecting body. The outer side face of the sponge mat abuts against the surface of the electrical equipment of the transformer substation, and small-amplitude reciprocating motion is conducted, so that dust is separated from the surface of the electrical equipment and enters air holes in the sponge mat, the dust is prevented from flying in the air, and the dust removal effect and the operation safety are improved; the control panel vertically moves back and forth in the dust removal main body to oscillate the sponge mat, and air flow generated by the air supply equipment is combined to blow the surface of the sponge mat, so that dust in air holes of the sponge mat enters the dust collection main body and is finally collected in the filter cartridge; therefore, the sponge pad can perform next-period dust removal operation on the electrical equipment of the transformer substation, and the operation efficiency is improved.

The invention relates to the technical field of automatic outer line processing of carbonized negative electrode materials, and discloses a fully automatic production process for carbonizing nanoelectric negative electrode materials. The process steps are as follows: step S1: a sagger loading process, step S2: a sagger leveling process, step S3: a sagger stacking process, step S4: a sagger covering process, step S5: a sagger cleaning process after covering the sagger, step S6: a sagger feeding and conveying process, step S7: a sagger feeding process into a furnace, step S8: a sagger unloading and discharging process, step S9: a sagger discharging and conveying process, step S10: a sagger cover removal process, step S11: a sagger layering process, step S12: a sagger high-temperature carbonization detection process, step S13: a sagger discharging process, and step S14: a sagger loading process. The whole process is closed, and dust is fully collected, so that dust is prevented from floating. At the same time, the invention is environmentally friendly and hygienic, has low cost, high quality, saves time and effort, and has good market application value.

The present application relates to a kind of local segment slice model for measuring ship slamming force, including slice segment bow model, keel beam, torque sensor, keel beam clamp, sensor clamp, slamming force sensor, I-beam, keel beam sensor axial fixing device, sectional interval break rib plate, middle sensor clamp, keel beam slamming force sensor.Each segment of the slice segment bow model of the present application has independent slamming force sensor, accurately measures the slamming force of the bow model slamming concern area and the area of large curvature change of lines;Torque sensor can measure the torsional moment of segment bow model during slamming process;Three-dimensional lines of segment can help to analyze the three-dimensional effect of segment slice during slamming process, and correct the numerical results of two-dimensional slamming calculation method;Sectional interval break rib plate reinforcing model segment stiffness, prevent segment model from being deformed and flutter by huge slamming force during slamming process, maintain the rigid properties of segment model.

The utility model discloses a packaging device for compound emulsifying drag reducer production, which comprises a packaging frame, a carton is arranged on the packaging frame, a glue sealing structure is mounted on the packaging frame, a driving structure, a cutting structure and a retention structure are mounted on the glue sealing structure, the glue sealing structure comprises a base, the base is mounted on the packaging frame, and the cutting structure is mounted on the base. According to the device, through the arrangement of the threaded rod, the U-shaped plate, the threaded sleeve, the transparent film, the electric telescopic rod, the idler wheels and other structures, when a compound emulsifying drag reducer is placed in a carton to be packaged, the transparent film moves forwards to scatter a transparent adhesive tape when the carton is prepared to be sealed, and the transparent adhesive tape is placed in the carton to be sealed; and then the electric telescopic rod is driven to drive the rolling wheel to press the transparent adhesive tape and roll, meanwhile, the threaded rod is used for driving the threaded sleeve to move, the transparent adhesive tape is attached to the carton, and therefore the carton can be conveniently and rapidly sealed.

The utility model relates to the technical field of concrete pavements, in particular to novel concrete pavement resonance stone crushing equipment which comprises a vehicle body, a stone crushing assembly is arranged in the vehicle body, a dust removal mechanism for dust removal of crushed stones is arranged on the right side of the vehicle body, and a protection mechanism for protecting the dust removal mechanism is arranged on the dust removal mechanism. The dust removal mechanism comprises a water pumping assembly and a water spraying assembly, the water pumping assembly comprises a water tank fixed to the right side of the vehicle body, two water pumps fixed to the upper surface of the water tank and first water pipes fixed to the input ends of the water pumps and penetrating and extending into the water tank, and the water spraying assembly comprises second water pipes fixed to the output ends of the water pumps. According to the novel concrete pavement resonance stone crushing equipment, water in a water tank is pumped out through a first water pipe and conveyed into a second water pipe through a dust removal mechanism and a water pump, water in the second water pipe enters a spraying box and is finally sprayed out through a water spraying pipe, water is sprayed to dust, and the dust is prevented from flying.

The invention relates to an aircraft wing and a method of operating an aircraft wing. The invention relates to an aircraft wing comprising: a fixed wing having a tip; a wing tip device rotatably mounted on a hinge at the tip of the fixed wing such that the wing tip device is rotatable about the hinge; and an actuation system for rotating the wing tip device about the hinge wherein the actuation system comprises a motor, at least one geared rotary actuator, a reduction gearbox, a clutch for selectively disconnecting rotation of the motor from rotation of the geared rotary actuator, the geared rotary actuator is drivable by the motor and is arranged to convert a rotary motion into a different rotary motion and to rotate the wing tip device relative to the tip of the fixed wing, a reduction gearbox is disposed between the clutch and the geared rotary actuator along a driveline between the motor and the geared rotary actuator.

The utility model relates to the technical field of cleaning devices, and discloses a machining cleaning device for a numerical control machine tool, which comprises a working table, supporting rods are fixedly connected to four corners of the top side of the working table, a cover plate is fixedly connected to the top sides of the supporting rods, and T-shaped openings are formed in the front end and the rear end of the working table. A driving assembly is fixedly connected to the inner wall of the left end of the workbench, a connecting plate is fixedly connected to the top end of the driving assembly, a connecting column is fixedly connected to the inner wall of the left end of the connecting plate, a rotating plate is rotatably connected to the top end of the connecting column, and a connecting column is rotatably connected to the inner wall of the right end of the rotating plate. According to the dust cleaning device, water can be sprayed to dust to prevent the dust from flying during cleaning, so that workers are prevented from feeling uncomfortable due to the flying dust caused by direct cleaning, and meanwhile, a mixture of water, impurities and dust is filtered, so that the water in the mixture can be recycled.

The invention discloses a rotary cutting tool comprising a plurality of cutting teeth, which is characterized in that a cutter body is provided with a plurality of cutter body chip accommodating grooves and cutting teeth corresponding to the cutter body chip accommodating grooves, and a chip breaking groove is formed in the front cutter surface of the cutter body, so that a zigzag cutting edge comprising the plurality of cutting teeth is formed on the cutting teeth; the cutter body chip containing groove is a straight groove, and at least part of the cutting teeth of the sawtooth-shaped cutting edge are provided with spiral cutting edge sections, or the cutter body chip containing groove is a spiral groove, and at least part of the cutting teeth of the sawtooth-shaped cutting edge are provided with vertical cutting edge sections and / or reverse cutting edge sections. According to the cutter, cutting force (including axial cutting pressure, axial cutting tension and radial cutting force) from different directions can be counteracted or balanced, double dispersion of the cutting force and cutting heat is achieved, the stability of the cutter in the machining process can be improved, and the temperature generated in the cutting process is reduced.

Novel solid waste treatment equipment belongs to the technical field of solid waste treatment equipment, and comprises a power supply module, a power supply switch, an electric crusher, a feeding bin, a fixing frame and a box body, and is also provided with a compression mechanism, a control circuit and a prompt circuit, the power module, the power switch, the electric pulverizer, the feeding bin, the fixing frame, the box body, the compression mechanism, the control circuit and the prompt circuit are installed together, and the compression mechanism comprises a movable plate, a linear bearing and an electric push rod. Due to the shielding effect of the movable cover, peculiar smell can be prevented from flowing into the air, after solid waste is fed into the feeding bin, the photoelectric switch can output a signal to the signal input end of the control circuit, the control circuit can control the electric pulverizer to work for a period of time to pulverize the solid waste, then the pulverized solid waste is compressed, and the solid waste is recycled. And when solid waste in the box body reaches a certain amount, a worker can be automatically prompted to clean the solid waste, so that the crushed waste can be treated in time, normal work of equipment is guaranteed, and good application prospects are achieved.

The utility model provides a plate cutting device with a dust collection mechanism, and relates to the technical field of cutting devices.The plate cutting device comprises a machining table, a motor is fixedly installed on the side face of the machining table, a threaded rod is fixedly installed at the output end of the motor, the surface of the threaded rod is in threaded connection with a moving block, a sliding groove is formed in the inner side of the machining table, and a dust collection mechanism is arranged in the sliding groove. A cutting machine is fixedly mounted on the inner side of the moving block, leakage grooves are formed in the inner side of the machining table and the inner side of the sliding groove, and a collecting plate is inserted into the inner side of the machining table. According to the plate cutting device, by arranging the collecting plate, the telescopic rod, the spring, the arc-shaped block, the top block, the sliding rod, the tension spring, the handle, the exhaust fan and the pipeline, chippings and dust can be collected when plate cutting work is conducted, chippings and dust are prevented from being accumulated and flying, and the cleanliness of the working environment can be improved; and after cutting work is finished, the collecting plate can be rapidly disassembled and assembled, the scrap collecting efficiency and the collecting plate installing efficiency can be effectively improved, and practicability is high.

The invention discloses a rotary cutting tool with a zigzag cutting edge, which comprises a cutter body and is characterized in that a chip breaker groove is arranged on the front cutter surface of the cutter body, so that the zigzag cutting edge comprising a plurality of cutting teeth is formed on the cutting teeth, the groove surface of the chip breaker groove is provided with a cutting guide surface, and the cutting guide surface is provided with a plurality of cutting teeth. Therefore, cuttings can be guided into the cutter body chip containing groove or guided in the chip removal direction of the cutter body chip containing groove. The sawtooth-shaped cutting edge can effectively offset or balance cutting force, including axial cutting pressure, axial cutting tension and radial cutting force, from different directions, double dispersion of the cutting force and cutting heat is achieved, the temperature generated in the cutting process is reduced, the stability of the cutter in the machining process is greatly improved, and the service life of the cutter is prolonged. The service life of the cutter is prolonged, the machining efficiency and precision are remarkably improved, and a brand-new technical path is developed for machining of the metal thin-wall part.

This utility model discloses a floating constructed wetland, including a floating platform and a water-blocking cover. Multiple first connecting lugs are fixedly connected to both sides of the floating platform, and multiple planting baskets are snapped onto the top of the floating platform. Multiple second connecting lugs are fixedly connected to the outer wall of one side of the water-blocking cover. Fastening bolts are threaded between adjacent pairs of first connecting lugs and between the second connecting lug and a first connecting lug of one of the floating platforms. Multiple water outlet pipes are sealed and inserted into one side of the water-blocking cover, and drain pipes are inserted into both ends of the water outlet pipes. A clamp is fitted at the connection between the drain pipe and the water outlet pipe. Multiple perforations are provided on the planting baskets, and a layer of expanded clay filler is laid inside the planting baskets. A layer of silt filler is laid on top of the expanded clay filler layer. This utility model allows rainwater runoff to pass over the floating constructed wetland and drain through the water outlet and drain pipes, thereby avoiding damage to the floating constructed wetland.