72results about How to "Avoid blowing away" patented technology

A garbage classification and collection system for a high-rise building comprises a vertical slideway, a control device, various kinds of garbage cans and at least one lifter. The vertical slideway serves as a garbage conveying passage for the high-rise building. The control device comprises a control panel of each floor and is used for controlling operation of the garbage classification and collection system. The various kinds of garbage cans are used for containing various kinds of garbage. Each lifter is disposed in the vertical slideway. The various kinds garbage cans are disposed on the lifters. The control device controls the lifters according to received instructions to drive the garbage cans to move up and down in the vertical slideway and rest at appointed floors. Compared with the existing garbage classification and collection system for high-rise buildings, the garbage classification and collection system adopts innovative thoughts, garbage can be classified and collected, and influence of garbage odor on residents of the high-rise building is reduced due to the fact that the garbage cans are disposed in the slideway. The garbage classification and collection system is simple in structure and easy in maintenance and late modification, and total automation can be achieved.

An aerial sowing seed arrow is applied in the plant sowing work of forest, agriculture and environmental protection and other fields. During the prior desert aerial sowing works, the seeds are exposed on the ground after landed, which is easy to blow away with the desert wind or parched by the high ground temperature, thus the seed buds damaged can not be germinated. The invention is in the use of the novel method for the aerial sowing of plant seed to change the prior direct sowing method of plant seed in the field trees and grass planting. The aerial sowing seed is utilized as a means of delivery, which carries the plant seed, nutrient soil and water to be in the formation of the aerial sowing seed arrow together. The purposes of sowing, as well as trees and grass planting are achieved through the airdrop broadcast sowing. The aerial sowing seed arrow is in the utilization of the impact force formed from the acceleration of air gravity, which bores into the position under the ground sand layer, thus the blowing away by wind and the high temperature baking of seeds can be avoided. Moreover the nutrient soil and water carried by the arrow itself is utilized for the germination and growth under the ground surface sand. With this method, the survival rate of aerial broadcasting is greatly enhanced. The methods of ejection, injection and broadcast sowing can also be used to the aerial seed arrow for the implementation of trees, grass or crops planting.

The invention discloses a method for restoring a crack of a blade of a hydraulic turbine. The method mainly comprises a preparation stage, a self-melting welding stage, a filling welding stage and an aftertreatment stage. At the preparation stage, the blade to be restored is cleaned and detected; at the self-melting welding stage, an inclined convergent laser beam with a negative defocusing amount is adopted for carrying out scanning in the extending direction of the crack, a V-shaped melting pool is formed, and molten metal liquid sinks to the bottom of the melting pool under the action of gravity, and is solidified to form a self-melting weld joint; at the filling welding stage, a material identical to a body of the blade is adopted as a welding wire for surface layer bead welding; at the aftertreatment stage, distressing tempering and blade surface finishing machining are carried out after welding is completed. In the restoring process, based on self-melting of the material of the body of the blade, the blade is filled with a few materials identical to the body of the blade, the material of the weld joint is identical to that of the blade, the material and the blade are combined well, a weld joint defect is not likely to be generated, and the combining strength of the weld joint is improved. In the self-welding welding and filling welding processes, molten metal in the melting pool is vibrated through ultrasonic waves generated by an ultrasonic generator on the back face of the blade to remove gas, and the defects of weld porosity and the like are reduced.

The invention discloses an agricultural centrifugal fertilizer-spreading device, and belongs to the technical field of the agricultural machinery. The agricultural centrifugal fertilizer-spreading device uses a two-stage storing mode, and is composed of a spiral-type beating mechanism and a rotation centrifugal fertilizer-spreading mechanism. The agricultural centrifugal fertilizer-spreading device is characterized in that a motor drives spiral blades on an inner rotating disk to be rotated through a transmission mechanism, a large piece of the chemical fertilizer is smashed, a main rotation shaft connected on a wheel drives a rotation shaft to be rotated through the transmission mechanism, the rotation shaft passes through a connecting plate and is connected with a two-stage storing tank, a lot of small holes are opened around the two-stage storing tank so as to spread the fertilizer smoothly, five connecting holes are uniformly opened in the connecting plate, and the range of spreading the fertilizer can be controlled by connecting the different holes. The agricultural centrifugal fertilizer-spreading device is capable of automatically beating a large piece of the chemical fertilizer, uniformly spreading the fertilizer by the centrifugal rotation tank, and changing the spreading range, and is suitable for the particle-shaped and powder-shaped fertilizer.

The invention provides a feather correcting and shearing integrated device for badminton production. The device comprises a box, a conveying belt, a hydraulic pump, supporting columns, a collecting box and control equipment, wherein the conveying belt is arranged on the inner side of the bottom end of the box, the hydraulic pump is arranged at the top of the box, the supporting columns are arranged on the left and right sides of the bottom of the conveying belt, the collecting box is arranged at the bottom of the left side of the conveying belt, and the control equipment is embedded in the front end of the box. The whole device is stable in structure, high in feather carding capacity, simple and convenient in shearing operation step, high in feather shearing efficiency, convenient in feather fixing operation and high in stability.

The invention relates to a mulching machine, in particular to a land mulching machine. By the land mulching machine, people can conveniently cover a land with a plastic film, and do not need to hold atool with hands to drive soil to two sides of the plastic film to press the plastic film, and the labor is saved. The land mulching machine comprises a bottom plate, wheels, a pull rod, a vertical plate, a cylinder, a fixing device, a first bearing block and the like; the two wheels are rotatably mounted on the left portions of the front side and the rear side of the bottom plate, the pull rod ismounted on the left side of the top of the bottom plate, and the vertical plate is fixedly connected to the rear portion of the left side of the top of the bottom plate. The plastic film sleeves thecylinder and is then fixed through an arc-shaped plate, the head end of the plastic film is pulled to penetrate through an opening and moves to be in contact with the land, then the plastic film is inserted into the land through a sleeve, then the device can be pulled to move leftwards to cover the land with the plastic film, the circumstance that two persons cooperate to separately hold the two ends of the plastic film to cover the land, and the land mulching machine is convenient.

The invention discloses a clothes hanger convenient to use. The clothes hanger comprises a bottom plate, wherein two sides of the upper surface of the bottom plate are respectively provided with a lower fixed rod, the top of the lower fixed rod is provided with an upper fixed rod, the top of the upper fixed rod is connected with a top plate in a threading manner by virtue of a bolt, the inner side of the lower fixed rod is provided with an L-shaped baffle plate, the upper surface of the baffle plate is provided with a storage rack, the lower side of the storage rack is provided with a supporting plate, the upper surface of the bottom plate is provided with a water storage groove, and the lower surface of the bottom plate is provided with a universal wheel. When one end of a connecting plate is pressed by a button, a bulge on the connecting plate can be retracted into the upper fixed rod together with the connecting plate, and then the upper fixed rod can be moved, so that the height of the clothes hanger can be conveniently adjusted, and time and labor are saved; and if the clothes hanger is relatively high, the bulge can be snapped into a through hole at the lower side of the lower fixed rod, and the height of the clothes hanger can be adjusted without disassembling the connecting rod, so that the use is convenient.

The invention belongs to the technical field of plant cultivation and in particular relates to a method for planting Suaeda salsa on a saline-alkali land. The method comprises the following steps of selecting and processing seeds (1), preparing the land (2), applying fertilizer (3), watering (4), trenching (6), broadcasting (7) and irrigating (8) and harvesting. By the use of the method, provenance merit factor and bud ratio can be guaranteed and improved; saline and alkaline of the soil can be reduced; survival of seedlings of the Suaeda salsa and final output can be improved; great ecological effect and environment protection can be improved; saline-alkali land and beaches can be greened and beautified; and utilization rate of the saline-alkali land can be improved.

The invention discloses a drying device for drying children's garments in air. The drying device comprises two drying plates, the bottom end of each drying plate is fixedly connected with a supportingblock, a counterweight device is fixedly connected into each supporting block, one side, deviating from the corresponding drying plate, of each supporting block is fixedly connected with a sliding device, a mounting plate is clamped between the two drying plates, the drying plates are connected with lifting plates through adjusting devices, two ends of each lifting plate are fixedly connected with limit devices, and a plurality of circular holes are equidistantly formed in the lifting plates. The heights of the lifting plates can be adjusted by the adjusting devices, so that the use requirements of different crowds are met. By interaction of a movable plate, a triangular block, an arc-shaped block, the mounting plate, a second spring and the like, and a clothes hanger is fixedly clamped and cannot be blown away when wind springs up.

The invention discloses a new energy water removal compression garbage can. The new energy water removal compression garbage can comprises a power chamber, a circulation garbage box and an other garbage box. The power chamber is composed of an energy storage system, a left side box and a right side box. An ashtray is arranged between the left side box and the right side box. A solar panel is arranged at the upper end of the power chamber. A circulation garbage inlet is formed in the upper side of the outer surface of the circulation garbage box. An inner barrel is arranged in the circulation garbage box. A drawer is arranged at the lower end of the inner barrel and provided with a drawer door panel. An other garbage inlet is formed in the upper side of the outer surface of the other garbage box, an isolation layer is arranged between the other garbage box and the circulation garbage box, and an ultraviolet lamp is arranged in the isolation layer. The new energy water removal compression garbage can conduct compression for water removal, bacterium breeding is reduced, and a cleaner can conveniently clean up garbage.

The invention discloses a multifunctional sprinkling machine. The machine comprises a mounting plate, two correspondingly fixing columns are fixedly connected to the edge of the top of the mounting plate, and a hollow rotation rod is rotatably connected between the two fixing columns; a rolling wheel fixedly sleeves the side wall of the rotation rod through a spoke, a first water pipe winds the side wall of the outer circle of the rolling wheel, and one end of the first water pipe penetrates through the side wall of the rolling wheel and extends into the rotation rod; a second water pipe is rotatably communicated with one end of the rotation rod, a through hole is formed in the top of the mounting plate, and a casing pipe communicated with the through hole is rotatably connected to the topof the mounting plate through a rotation shaft; an inner thread is arranged on the inner wall of the casing pipe, a lead screw is in threaded connection with the inner wall of the casing pipe throughan inner thread, the bottom of the lead screw penetrates through the through hole, and the bottom of the lead screw extends to the power portion of the mounting plate. According to the multifunctional sprinkling machine, by using an adjustment function of adjustment blocks and adjustment pipes, the aim of sprinkling irrigation diversification is achieved, and through arrangement of an iron ploughand a pesticide box, the aim of the diverse functions of the sprinkling machine is achieved.

The invention discloses a novel rotary dryer suitable for garbage materials. The novel rotary dryer suitable for the garbage materials comprises a barrel, a barrel driving device, a material inlet assembly and a material outlet assembly, wherein a plurality of elongated lifting plates, a plurality of trapezoidal lifting plates and a plurality of pushing lifting plates are arranged in the barrel; the elongated lifting plates are distributed uniformly along the circumference; the length direction of each elongated lifting plate is set in the axial direction of the barrel; a long side of each elongated lifting plate is welded with the inner side of the barrel; wide sides of the trapezoidal lifting plates are connected to the other long sides of the elongated lifting plates at intervals; the pushing lifting plates are arranged in the axial direction of the barrel at intervals; and an included angle is formed between the plane of each pushing lifting plate and the axial direction of the barrel. The lifting efficiency is improved, and the materials are raised fully; the materials are uniformly dispersed to a cross section of the rotating barrel, so that the materials are in full contact with smoke, and the heat transfer efficiency is improved; by the pushing lifting plates, the pushing angle is changed, the material advancing speed is also changed, the retention time is adjusted, and the materials are dried fully; and by a hot smoke supplementing device, the temperature of the materials in a middle rear part of the rotating barrel is increased, and therefore, the drying effect is improved.

The invention discloses a lithium battery accurate recovery method. The method comprises the steps of 1) performing discharge treatment on a waste lithium battery; 2) pumping an electrolyte in the waste lithium battery into a first collection box by adopting a waste lithium battery electrolyte recovery device, and drying the interior and exterior of the waste lithium battery from which the electrolyte is pumped; 3) shearing and separating a shell of the waste lithium battery, and recycling the shell to obtain a battery pole core; 4) cutting and crushing the battery pole core to obtain a crushed battery pole core; 5) putting the crushed battery pole core into a powdering device of a graphite separation device, pulverizing graphite in crushed battery pole core, pulverizing raised dust in thepulverizing device, spraying air at the bottom of the pulverizing device, sucking raised dust gas in the pulverizing device from the upper side wall or the top of the pulverizing device, arranging multiple stages of filter screens in a suction pipeline, and collecting graphite powder with different particle sizes through the filter screens. According to the invention, the electrolyte, the shell,the positive electrode metal and the negative electrode graphite can be accurately separated and recycled, and the resource utilization of the waste lithium battery is improved.

The invention discloses an intelligent electric rain and wind resistant laundry rack. The laundry rack comprises a frame, a first bracket, a second bracket, a wind quantity sensor, a screen driving system and a clothes airing system, wherein a screen is arranged between the first bracket and the second bracket; the screen driving system comprises a screen driving motor and four screen furling devices; the tail ends of ropes in two screen furling devices extend along the vertical direction and then are fixed at one side of the second bracket; the tail ends of ropes in the rest two screen furling devices extend along the horizontal direction and then are fixed at the other side of the second bracket after bypassing steering wheels. The laundry rack has the beneficial effects that the actions of the screen driving motor and the clothes airing system are controlled after sensing blowing and raining by the wind quantity sensor; under the conditions of blowing and raining, the screen is unfolded and then wraps the clothes airing system inside to keep out wind and rain, thus preventing wind from blowing away aired clothes and rain from wetting the clothes and then achieving the wind and rain resistance function.

The invention discloses a safety anti-falling device for building engineering, and relates to the technical field of foundation pit barriers. The safety anti-falling device solves the problems that anexisting foundation pit anti-falling device cannot flexibly shrink and deform, the overall volume of the device is large, and transportation and storage are not convenient. The safety anti-falling device for the building engineering comprises a center supporting pipe, a positioning ring and an ejecting pressing ring, wherein three external threads are arranged on the outer wall of the circumference of the central supporting pipe in an upper and middle and lower interval mode, thirty clamping plates in a circle is supported by and welded to the bottom section of the central supporting pipe ina ring array, and a base ring is welded and fixed to the periphery of the circle of the clamping plate; and a sliding ring is welded and fixed to the center of the positioning ring, and the positioning ring is arranged on the central supporting pipe in a sleeving and sliding mode through a sliding ring. According to the safety anti-falling device for the building engineering, the positioning ringcan be conveniently lifted to open and close a rain-shielding umbrella through an inserting frame, and the inserting frame can be inserted into the positioning ring through the selective insertion ofthe upper and lower groups of inserting holes, so that the rain-shielding umbrella is kept in an open or contracted state.

The invention provides a press-in type construction ventilation system for an extra-long high gas tunnel. The press-in type construction ventilation system for the extra-long high gas tunnel comprises a main air inlet unit, a main air return unit and a branch ventilation unit, wherein the air inlet unit comprises an air inlet area, a main pressure fan, three or more fresh air fans and three or more air pipes, the air inlet area is located at the rear ends of a right line and a parallel adit, the air inlet area communicates with a drainage tunnel, and the main pressure fan and the fresh air fans are arranged in the air inlet area correspondingly; the three fresh air fans correspond to a left line, the parallel adit and the right line correspondingly, each fresh air fan supplies fresh air to the corresponding excavation face through the corresponding air pipe, and the main pressure fan is located in the right line and supplies the fresh air to the branch ventilation unit; the main air return unit comprises an air return area which is located at the rear end of the left line and communicates with an inclined shaft; the branch ventilation unit comprises a ventilation area, the ventilation area is located at the front end of the left line, the front end of the right line and the front end of the parallel adit and communicates with the air inlet area and the air return area correspondingly, and the main pressure fan blows the fresh air to the ventilation area, so that old air in the ventilation area can be exhausted from the air return area. According to the press-in type construction ventilation system for an extra-long high gas tunnel, the fresh air and the old air are conveyed separately, and safety is high.

The invention discloses a Dewar for superconducting magnetic levitation which comprises a shell, a plurality of layers of heat insulators and an inner container which are sequentially arranged from outside to inside, a superconducting magnet is further fixed between the shell and the inner container, the space between the shell and the inner container is vacuumized, and a liquid conveying pipe extending into the inner container is installed on the shell. The liquid conveying pipe is provided with a two-section structure of a stainless steel tube and a glass steel tube, so that heat leakage isreduced, vaporization of low-temperature liquid is reduced, liquid nitrogen is prevented from being blown away during liquid supplementation, and liquid supplementation loss is reduced; supporting columns abutting against the superconducting magnet are arranged at the bottom of the shell, first reinforcing ribs are welded to the outer side wall of the shell, second reinforcing ribs are welded to the inner side wall of the inner container, the first reinforcing ribs, the second reinforcing ribs and the supporting columns improve the rigidity of the bottom of the Dewar, rigidity is enhanced under the condition that it is guaranteed that the thickness of the bottom face of the inner container and the bottom face of the shell does not exceed 3 mm, and deformation is avoided. Therefore, the heat insulation performance of the Dewar is fundamentally improved; meanwhile, the design can also reduce the weight, shorten the spacing distance between the magnets and improve the equipment performance.

A multi-span greenhouse capable of resisting wind, ice and snow comprises a basic frame, ceilings, corridors and wind-resisting heat insulation films. Each ceiling comprises two lateral ceilings. Eachlateral ceiling comprises at least one arc-shaped arching frame. The arching frames are arranged on the basic frame and arrayed longitudinally. At least one arc-shaped wind guide support is arrangedat the end of the multi-span greenhouse. The corridors are arranged between the adjacent ceilings, and are fixed to the basic frame. The width of each corridor is larger than or equal to 1.5m. The wind-resisting heat insulation films cover the ceilings and the arc-shaped wind guide supports. The multi-span greenhouse has the advantages that the lateral ceilings are provided with the arc-shaped arching frames, the arc-shaped wind guide supports are arranged at the end of the multi-span greenhouse, the wind-resisting heat insulation films are convenient to lay with radian, snow and rainwater slide down to the ground along the radian of the wind-resisting heat insulation films, accumulation of the snow and the rainwater on the wind-resisting heat insulation films of the greenhouse is reduced,and collapse of the greenhouse is avoided; heating resistance wires on the ceilings are electrified according to conditions, so that ice and snow on the greenhouse is cleaned timely and quickly, andsituations such as icing and snow accumulation of the greenhouse are avoided.

The invention discloses a soil straw mixing agitator, a spiral conveying unit and a mixing agitation method, and belongs to the technical field of agricultural machinery and fertilizer returning to the field. According to the soil straw mixing agitator, a deep rotation mixing and soil breaking unit and the spiral conveying unit are sequentially arranged from front to back along the advancing direction of the soil straw mixing agitator; the deep rotation mixing and soil breaking unit comprises a first rotation shaft and deep rotation scoops uniformly distributed on the first rotation shaft; thespiral conveying unit comprises a second rotation shaft and two spiral blades symmetrically distributed on the second rotation shaft, the two spiral blades are opposite in spiral directions, and slotholes are uniformly distributed on the spiral blades; the second rotation shaft reversely rotates when the soil straw mixing agitator advances. The idea of pushing straws from a ground surface to anunderground space into grooves and burying the straws is put forward, the mixing agitator and the spiral conveying unit for implementing the scheme are designed, and the problem of the influence of excessive local straws in a soil layer on seeding operation quality is solved.

The invention discloses a fluorination device for treating neodymium iron boron waste powder, and belongs to the technical field of neodymium iron boron waste treatment. The fluorination device comprises a fluorine gas generating device, and a top outlet of the fluorine gas generating device is connected with a corrugated pipe. The right side wall of the fluorine gas generating device is connectedwith a reaction pipe through a screw, and the top of the left end of the reaction pipe is connected with a gas inlet. The gas inlet is connected with the bottom of the right end of the corrugated pipe, and spoilers are evenly mounted on the left side wall of an inner cavity of the reaction pipe. The upper side of the middle of the reaction pipe is connected with a charging opening, and a protection cover is mounted in the middle of the upper side wall of the inner cavity of the reaction pipe. The protection cover is connected with the bottom of the charging opening, and the bottom of the reaction pipe is connected with an arc-shaped reaction bin. According to the fluorination device for treating the neodymium iron boron waste powder, by arranging the spoilers, the flow velocity of fluorine gas can be reduced; by arranging the protection cover, gas flow is prevented from blowing away the raw material powder; and by arranging a gas pressure inductor and a PLC, the intelligent control degree is higher.

The invention belongs to the technical field of a trichogramma egg releasing device and method, and discloses an automatic releasing device for trichogramma egg cards and a method for releasing trichogramma egg cards by using the device. The automatic releasing device is mainly characterized by comprising a base and a frame located above the base, wherein a push plate is arranged above the base, the frame comprises a front stop block, a back stop plate, an upper stop plate and a side door, a temporary card storage cavity is defined between the front stop block and the back stop plate, an oscillating bar is arranged on the frame in the middle of the temporary card storage cavity, alignment blocks are arranged at the lower end of the oscillating bar, and the distance between the lower end ofthe side door to the upper surface of the base is slightly larger than the thickness of trichogramma egg cards. The trichogramma egg cards are sequentially pushed out and released from the lower sideof the side door, the alignment blocks in the middle perform first alignment and second alignment so that the cards cannot get stuck, an unmanned aerial vehicle is used to fly over corn fields or other crops, the trichogramma egg cards are uniformly released in the fields, the labor efficiency is high, and uniform release is realized.

The invention belongs to the field of food processing equipment, and particularly relates to a tea stir-frying device based on an airflow action and capable of realizing high quality and high cleanness. The device comprises a support, wherein a frying cylinder is fixedly connected to the support, a rotating disc is rotationally connected in the frying cylinder, a plurality of partition plates arefixedly connected to the rotating disc, and the ends, away from the rotating disc, of the plurality of the partition plates are rotationally connected with worms. Through cooperation of the pluralityof the partition plates and the rotating disc, the tea stir-frying device can drive tea to turn over for stir-frying, in cooperation with rotation of the partition plates, rotation of a plurality of fan blades can be realized, opposite airflow is produced between the every two partition plates to further drive the tea for stir-frying, labor is saved, and the efficiency of the tea stir-frying operation is greatly improved; and in addition, under the action of a piston box, floating dust in the frying cylinder can be sucked in real time, the environmental pollution caused by the floating dust isavoided, and cleanness of the tea can be ensured.

The invention provides a container structure for green building roof greening planting. The container structure comprises a container, a driving part, a limiting part and a clamping part; the driving part is arranged on the periphery of the container; the limiting part is arranged on the top surface of the container, and the clamping part is arranged in the limiting part; the driving part comprises a connecting frame, an air bowl, a push ring, a connecting block, a pushing plate, a clamping plate and a primary pressing block; the connecting frame is arranged on the periphery of the container, and the air bowl is arranged on the connecting frame; the pushing ring is arranged in the air bowl, the connecting block is arranged on one side of the pushing ring, and the pushing plate is arranged on one side of the connecting block; the clamping plate is arranged on one side of the connecting block, and the primary pressing block is arranged on one side of the connecting block. A rotating block can be driven to rotate by continuously pressing the rotating block downwards through the clamping plate, and the rotating block is clamped between the clamping plate and the pushing plate, so that wing plates are connected into a whole, the shielding effect of the wing plates is further enhanced, and soil and plants in the container are prevented from being blown away.

The invention provides a house building facade modular landscape intelligent vertical greening system, and belongs to the technical field of building greening. A house building facade modular landscape intelligent vertical greening system comprises a building facade installation unit which is of an arch structure, and the top of the building facade installation unit is sequentially provided with a controller, a raindrop sensor and a wind speed sensor; and the greening assembly comprises green plant square frames, first transparent plates, greening planting grooves and soil humidity sensors, the green plant square frames are vertically installed on the front side of the building facade installation unit at equal intervals, and the first transparent plates are embedded in the left side, the right side and the rear side of each green plant square frame correspondingly. Through modular installation, intelligent storage and utilization of rainwater are realized, excessive rainwater is prevented from seeping out of sewage with mud, green plants can be intelligently protected in strong wind extreme weather, the green plants and soil are prevented from being blown off, and potential safety hazards can be reduced.

The invention provides an intelligent plastic film mulching machine. The machine includes a rectangular-ambulatory-plane fixing frame, rear side wheel racks, rear wheels, an adjustable scraping rack structure, a front side driving rack structure, detachable moving rack structure, a side fixing frame, a concave groove, a guiding rod, a handle, a rear side fixing rack, a front side fixing rack, an auxiliary cutting rack structure, a controller, a power switch, a buffer guiding rack structure and a rechargeable lithium battery; the rear side wheel racks are welded on the front and back sides at the lower middle part of the rectangular-ambulatory-plane fixing frame; and the rear wheels are in shaft connection with the lower parts of the rear side wheel racks. The lower part of a conical cutteris arranged into a wavy shape, thus, a horizontal plate can be pressed downward during using so as to use a vertical rod to downward push the conical cutter, and therefore, plastic films can be conveniently cut off; and anti-skid teeth are respectively welded outside a protection sleeve, so that the traction of a moving wheel can be increased when the moving wheel contacts with the ground duringusing, and the machine can be conveniently driven to move.

The invention belongs to the field of composite material preparation, relates to a method for preparing an Mg2Si enhanced Al based composite material, in particular to a novel method for preparing anMg2Si / Al composite material in situ by laser deposition, and belongs to the technical field of composite material preparation. The method is characterized in that a traditional casting method is omitted, and an advanced laser deposition technology with high material use ratio is adopted. Al-50% Mg powder and Al-9% Si powder are placed into a ball mill according to the mass fraction 7:2:1 of Al, Mgand Si, the powder is prepared into a preset piece, the preset piece is fixed onto a 6061 aluminum alloy substrate, and single-channel multilayer laser deposition is performed with the laser power of800W-1100W, the scanning speed of 200mm / min-400mm / min and the spot diameter of 1.5mm to obtain the Mg2Si / Al composite material. The method is simple in process and convenient to operate, grain sizesare small, and mechanical properties are good.