48results about How to "Solve the clogging phenomenon" patented technology

The invention relates to an automatic packaging production line, in particular to a fully-automatic packaging production line of a beef tallow hot pot seasoning. The production line comprises a feeding and conveying device, a packaging machine and a control unit, wherein the packaging machine is a horizontal type fully-automatic constant temperature packaging machine; the feeding and conveying device comprises a tallow separator, a material feeding device and a tallow feeding device connected with the tallow separator, a booster pump respectively connected with the material feeding device and the tallow feeding device and an insulating conveying pipe provided with an insulating interlayer; the insulating conveying pipe is connected with the packaging machine through an electromagnetic valve; a heating device is arranged and connected with the feeding and conveying device; and the control unit is electrically connected with the horizontal type fully-automatic constant temperature packaging machine, the feeding and conveying device and the heating device so as to control the feed, the temperature, the quantitative loading and the packaging of materials and the cleanness of production line equipment. The production line realizes the packaging automation of the beef tallow hot pot seasoning, improves the productivity and avoids pollutions to products by manual operations.

The invention relates to the technical field of agricultural planting, and discloses a wheat-corn relay interplanting planting method. In the method, a mode of alternating wheat planting zones and corn planting zones is adopted, and wheat is planted before corn is planted; four rows of wheat are used as one planting zone; row spacing between the second row of wheat and the third row of wheat ranges from 25 to 35 centimeters in the planting zone, and the row spacing between the rest two adjacent rows of wheat is 20 centimeters; an empty row with the width of between 125 and 135 centimeters is reserved between the two wheat zones and is used for planting the corn zones; two rows of corn are used as one planting zone; row spacing among corn is 45 centimeters; and the space between the adjacent corn and wheat ranges from 40 to 45 centimeters. By the method, the row number of planting the wheat is reduced, and the wheat is planted in a mode of wide-narrow row spacing, namely compared with the original row spacing, the row spacing of the corn is reduced by 5 centimeters, so the space between the wheat and the corn is increased; and the planting environment of intergrowth period of the wheat and the corn is optimized, the shading effect of the wheat on the corn is relieved, and the specific yield and yield per unit area of both the wheat and the corn are improved simultaneously.

The invention discloses a preparation method of activated carbon dynamically coated with a hydrophobic material. The preparation method comprises the following steps: (1), pretreating activated carbonto remove impurities on the surface of the activated carbon, marking pretreated activated carbon samples respectively, and then placing in a drying vessel for use; (2), preparing a solution of a hydrophobic monomer: dissolving the hydrophobic monomer and an initiator dibenzoyl peroxide in an organic solvent in an ice water bath, and mixing as a polymeric resin solution by stirring; (3), taking aproper amount of a polymeric resin solution and performing vapor deposition on the surface layer of the activated carbon by a vapor deposition method, and placing the obtained activated carbon in a constant-temperature blast drying oven with the temperature of 120-160 DEG C, and drying at the constant temperature for 2-4 hours to obtain modified samples. According to the preparation method provided by the invention, the preparation process is simple, the amount of consumables is small and a preparation condition is mild; the prepared modified activated carbon material has hydrophobic surface chemical properties, so that the defects that a porous carbon material absorbs moisture easily and adsorbs a small quantity of target organic matters at high humidity are made up; the prepared modifiedactivated carbon material is easy to recycle and recyclable.

The invention discloses a treatment device for printing and dyeing wastewater, and relates to the technical field of wastewater treatment. The treatment device comprises a water inlet device, a filtering device, an anaerobic biological treatment device and a photocatalytic device. The water inlet device comprises a set of first water pipes, three second water pipes are fixedly communicated betweenthe two first water pipes, a third water pipe is fixedly communicated to one of the first water pipes, and a fourth water pipe is fixedly communicated to the other first water pipe. The filtering device comprises a first tank, an air blower and a second motor, and a first fixing plate is fixed to the inner wall of the first tank. The treatment device has the advantages that the outside air is fedinto the first tank along a plurality of first slotted holes in an airbag by the air blower, the wastewater is stirred, and a first motor drives a plurality of blades to slowly rotate, so that the wastewater in the first tank is fully stirred, and oil agents easily float up and flow out along an oil drain pipe; acid and alkali adjustment is facilitated in the stirring process, so that the acid-alkali adjustment treatment effect on the wastewater is good.

The invention discloses a method for making super hard abrasive particles be arranged orderly in an abrasive belt. The method comprises the steps that (1), an abrasive belt base body is subjected to pretreatment; (2), an orderly-arrangement pattern of the super hard abrasive particles is designed, the pattern is formed on a film, and the film with the arrangement pattern is obtained; (3), in a dark room, the pretreated abrasive belt base body is coated with photo-sensitive glue; (4), in the dark room, the film with the arrangement pattern is pasted to the abrasive belt base body obtained in step (3), and through exposure and development, the abrasive belt base body with the working face being provided with the clear arrangement pattern is obtained; (5), the base body obtained in step (4) is subjected to electroplating in a plating solution containing the super hard abrasive particles, or the base body obtained in step (4) is placed into the plating solution, the super hard abrasive particles are placed on the base body and subjected to electroplating operation, and an abrasive belt plating piece made of good sand is obtained; (6), peripheral floating sand is removed out of the obtained abrasive belt plating piece, thickened plating is performed, and the electroplated abrasive belt base body is obtained; (6), then, a backlining is pasted to the abrasive belt base body and made into a ring shape, and the abrasive belt base body can be obtained.

The invention relates to a code spraying ink modifying agent which comprises the components with weight percentage: 20-60wt% of solvent, 10-40wt% of latent solvent, 1-10wt% of anticoagulant, 1-10wt% of electrical conduction control agent, 0.1-6wt% of pH conditioning agent, 5-15wt% of adhesive force promoting agent, 0.1-4wt% of osmotic agent, 0.5-9wt% of stabilizing agent and 0.1-5wt% of coloring agent. The anticoagulant and the latent solvent contained in the code spraying ink modifying agent can effectively improve the phenomenon that a nozzle is easy to plug by code spraying ink, and ensures the code spraying ink to be dried rapidly and print more clearly and smoothly; the contained adhesive force promoting agent can be used for strengthening the adhesiveness of the code spraying ink for base material, especially metal base material, so as to lead the image to be firmer and hard wearing. Various auxiliary agents in the invention are matched for use, so that the performance of the code spraying ink can be effectively enhanced, the image resolution ratio is improved, the separation of ink dots is clear, the problem of trickling and deforming of the ink can be solved, and the corrosion resistance is improved.

The present invention belongs to the field of solid fertilizer technology, and the no-jamming whole nutrient solid fertilizer for drip irrigation is one new kind of fertilizer for drip irrigation and including nitrogen fertilizer, phosphate fertilizer, potash fertilizer, dissolution promoter and trace elements. The no-jamming whole nutrient solid fertilizer for drip irrigation is prepared through mixing nitrogen fertilizer, phosphate fertilizer, potash fertilizer, dissolution promoter and trace elements and pelletizing the mixture. The no-jamming whole nutrient solid fertilizer of the present invention has comprehensive and balanced nutrients and no jamming in drop irrigation application, and can raise the absorption of plant on nutrients, raise fertilizer utilization rate, increase crop yield, raise crop quality and lower agricultural production cost.

The invention discloses a method for solving spray head blocking based on an FDM technology. By adding a material component with a shear thinning characteristic and compatible with a base material during preparation of a printing material, when the equipment spray head bears a shear acting force due to the conical structure or the existence of impurity particles in a 3D printing process, the viscosity of the printing material is reduced, the fluidity is improved, and the phenomenon of printing spray head blocking is effectively solved; and after being extruded out of the spray head, the printing material does not bear the shear action, the viscosity quickly recovers to an initial state, and thus the surface quality of the printed product is not influenced in a solidification process. By adopting the method disclosed by the invention, a high-content reinforcing fiber material also can be added into the printing material, the strength of the printed product is improved, and the application field of the printed product is expanded. Moreover, the method disclosed by the invention also has the advantages of simple production technology, easiness in operation, convenience for industrial production and the like.

The invention discloses a vertical-type stock-solution outside tube falling-film evaporator. The falling-film evaporator comprises a vertical-type evaporator, a condenser, a heat exchanger, a steam input tube, a steam output tube and a compressor arranged on the steam output tube; the condenser is communicated with a stock solution tube, and the vertical-type evaporator comprises a vertical-type tube, a first steam box, a second steam box, a solution distribution box, a solution distributor, an evaporation chamber, a solution collection box and tube harnesses; the solution distributor comprises a plate and honeycomb holes, and gaps exist between the honeycomb holes and the outer surfaces of the tube harnesses; the second steam box comprises a first cavity and a second cavity, the first steam box comprises a third cavity and a fourth cavity, the condenser is communicated with a condensation water tank, the heat exchanger comprises a first plate-type heat exchanger and a second plate-type heat exchanger which is provided with a condensed water drainage tube communicated with the second plate-type heat exchanger, steam exhausted to a defoamer is secondary steam, and an external steam heat source can be boiler steam or compressor warming secondary steam or industrial waste steam. The vertical-type stock-solution outside tube falling-film evaporator has the advantages of being wide in application range, not prone to scaling and convenient to clean and achieving condition monitoring conveniently.

The invention discloses a purification treatment device for low-zinc sulfuric acid waste gas. The purification treatment device comprises purification equipment. Through the arrangement and cooperative use of the purification equipment, a transmission mechanism, a transmission plate, a first rotating shaft, a connecting rod, a second rotating shaft, a movable rod, a knob, a limiting mechanism, springs, a movable plate, a limiting rod, a water tank, a groove, a positioning plate, a bearing, a filter screen, a shaft pin, a rotating rod, sliding blocks, sliding grooves, a movable groove, a movable hole, a through hole, a limiting hole, a mounting groove, a dovetail groove and a dovetail block, the problem that a filter screen of an existing spray tower is usually installed through screws andinstalled inside a water tank of the existing spray tower, the filter screen is blocked in long-time use, the installation mode is particularly troublesome during disassembly, a user needs to use a specific tool to disassemble the filter screen, the practicability and convenience are greatly reduced, and particularly the use by a user is inconvenient is solved.

The invention discloses a shoemaking vamp drilling device capable of automatically drilling holes and collecting waste materials in a centralized mode, and the device comprises a machine body; a machining table is fixedly connected to the right side of the machine body, guide columns are fixedly connected to the front side and the rear side of the bottom of an inner cavity of the machining table,and a lower pressing plate is slidably connected to the surfaces of the guide columns; a driving mechanism is arranged at the top of the machine body, and a storage mechanism is arranged at the bottomof the machining table. According to the punching device, through cooperative use of the driving mechanism, the pressing mechanism and the drill bit, materials are punched, meanwhile, through cooperative use of the storage mechanism and the automatic locking mechanism, waste materials left after punching are returned and collected; meanwhile, a user can adjust the number and the arrangement shapeof the drill bits through cooperative use of the limiting mechanism and the extrusion mechanism according to actual machining requirements, and the purposes of high-accuracy automatic punching, high-efficiency automatic material returning and collecting and rapid adjustment and change of the punching number and shape can be achieved.

The invention discloses an electrostatic spraying device beneficial for spraying work. The electrostatic spraying device includes a machine body, a storage barrel is fixed on the machine body, a discharging hole connected with a conveying pipe is formed in a portion close to the bottom of the side wall of the storage barrel, an elastic filter net is arranged in the discharging outlet, a connectingplate is fixed on a portion, close to the discharging hole, of the inner wall of the storage barrel, a connecting rod vertically extending downward is hinged to a portion close to the middle of the connecting plate, a magnetic column is fixed at the bottom of the connecting rod, a plurality of working needles are arranged on the outer surface of the magnetic column, and both ends of the connecting plate are fixedly provided with a first electromagnet and a second electromagnet used for sucking the magnetic column; according to the electrostatic spraying device, the blockage of coating in theconveying pipe is avoided, and the continuity of transportation work is ensured, thereby improving spraying efficiency.

This invention relates to a foam tool, which comprises a casing body, a connecting element, a liquid inlet valve, a liquid outlet valve, and a switch device. The switch device can lead the liquid outlet valve to be opened or closed. The invention is characterized in that the liquid inlet valve and the casing body and / or the connecting element are made into a split structure; the foam tool also comprises a sealing device arranged between the liquid inlet valve and the connecting element or the casing body, parts easy to be damaged or to leak or to be blocked in the foam tool can be converted conveniently, in particular the liquid inlet valve can be converted, the troubles easy to appear in the foam tool are solved, the resource is greatly saved, the structure is simple, the installation is convenient, and the foam tool is suitable for mass production.

The invention belongs to the technical field of plating machining, and particularly relates to a titanizing technology method for the surface of an aluminum welding wire. A cotton thread containing titanium is wound on the surface of the aluminum welding wire, an assistant is dripped on the aluminum welding wire so that the assistant can be attached to the surface, with the cotton thread containing titanium, of the aluminum welding wire, after the cotton thread is completely pulled away from the aluminum welding wire and the assistant on the surface of the welding wire is completely volatized, the processed aluminum welding wire is polished, and the aluminum welding wire with the surface wrapped by titanium is obtained. According to the technology, titanium is evenly attached to the surface of the welding wire, pits and other unfavorable surface conditions generated in the pull-draw process can be comprehensively avoided, welding spatter is smaller during welding, weld joint grains can be refined through a trace of titanium, bubbles are avoided, the quality of a weld joint is improved, and the mechanical performance of the aluminum welding wire is improved.

The invention discloses a body fluid sampling device for the clinical laboratory. The body fluid sampling device for the clinical laboratory comprises a needle head assembly, a fluid taking pipe, a movable cover assembly, an inlet pipe assembly, a blockage cleaning assembly and a fluid storage pipe assembly; the movable cover assembly is movably connected to the outer surface of the needle head assembly in a sleeving mode; the fluid taking pipe is fixedly connected with the needle head assembly; the other end of the fluid taking pipe is movably connected with the fluid storage pipe assembly; the inlet pipe assembly is fixedly arranged at one end of the fluid storage pipe assembly; and the blockage cleaning assembly is movably arranged in the inlet pipe assembly. According to the invention, a needle cover can be prevented from accidentally falling and losing; meanwhile, a medical worker is prevented from being accidentally punctured by the needle tube; fluid is prevented from accidentally leaking; the possibility of blood disease infection is reduced; in addition, the temperature in a fluid storage cavity is maintained; the fluid in the fluid storage cavity is effectively prevented from being solidified; the blockage phenomenon of a pipeline end is solved; and finally, the fluid taking pipe is prevented from being accidentally broken and separated.

The invention relates to the field of ammonia spraying pipeline assistance, in particular to a device for slowing down blockage of an ammonia spraying pipeline adjusting door and a using method. The device comprises filter shells, inlet triangular valves, outlet triangular valves, a filter element, supporting legs and upper end covers; every two filter shells form a group and are connected in a matched mode; an upper connecting pipe and a lower connecting pipe are arranged between the two filter shells of each group; the inlet triangular valves and the outlet triangular valves are respectivelymounted on the two connecting pipes in groups; and the upper end covers cover the tops of the filter shells, and sealing rubber pads are further arranged at the joints of the upper end covers and thefilter shells. In the embodiment of the invention, the layout of the filter is optimized, and the filter element and the double-valve design for gas circuit switching are additionally arranged, so that the filter can intercept and filter most residual impurities, and the phenomenon of blockage of an ammonia injection adjusting door is avoided; impurities can be filtered out through the filter, and a filter element of the filter is periodically cleaned; and in the overhaul and maintenance process of the device, only gas supply management needs to be switched, and outage and standby are not needed.

The invention provides a glue gun which comprises a base for fixing a glue barrel capable of storing glue. The propelling device is used for extruding the rubber material in the rubber barrel cavity and comprises a lead screw, a guide sleeve and a piston which are arranged in the rubber barrel cavity, the guide sleeve is connected with one end of the lead screw through a ball nut, and the piston is connected with the other end of the lead screw through a bearing; the motor is arranged on the base, and a main shaft of the motor penetrates through the rubber sleeve and is connected with the guide sleeve; the motor is driven, the guide sleeve rotates along with a motor spindle, the screw rod synchronously converts the rotating motion into linear motion relative to the guide sleeve through the ball nut, and the piston linearly moves along with the screw rod; the glue nozzle is used for effectively discharging the extruded glue in the glue barrel cavity, and the glue nozzle is communicated with the glue barrel through a pressure reducing valve; the motor main shaft rotates to drive the propelling device to extrude glue in the glue barrel cavity, the microprocessor opens the pressure reducing valve and adjusts the throttling area of the pressure reducing valve according to feedback of the pressure sensor, the glue outlet amount can be freely controlled, and uniform and continuous glue outlet is achieved.

The invention discloses a high-efficiency extraction device for extracting functional components of tangerine peel, comprising a crushing mechanism, a support, an extraction device, a filter and a separation tank; a transfer tank is arranged at the discharge end of the bottom of the filter, and a pump is arranged in the transfer tank It is connected with the feeding port of the separation tank through the pump body; a crushing box is arranged between the condensation cabinet and the feeding box, a circular crushing cavity is arranged in the crushing box, a crushing piece is arranged in the crushing cavity, and the second drive motor is installed On the bracket, the output end of the second driving motor is rotatably connected with the driving pulley, the driving pulley is connected with the driven pulley through a belt, and the driven pulley is connected with the crushing piece; the extraction process of the tangerine peel of the present invention has the effect of dissolving the effective components of the tangerine peel through enzymatic hydrolysis. It has the advantages of high rate, fast decomposition of bitter substances, high retention rate of active ingredients, high filtration efficiency, low energy consumption, high degree of automation and high extraction efficiency.

The invention relates to an automatic packaging production line, in particular to an automatic packaging production line for butter hot pot bottom material, which includes a feeding and conveying device, a packaging machine and a control unit, wherein the packaging machine is a horizontal automatic constant temperature packaging machine; the feeding and conveying The device includes: an oil separator, a material supply device connected to the oil separator and an oil supply device, a pressurized pump respectively connected to the material supply device and the oil supply device, and an insulation delivery pipe with an insulation interlayer; and the insulation delivery pipe passes through the electromagnetic The valve is connected to the packaging machine; a heating device is provided, and the heating device is connected to the feeding and conveying device; the control unit is electrically connected to the horizontal automatic constant temperature packaging machine, the feeding and conveying device and the heating device to control the supply, temperature, and Quantitative packaging, packaging and cleaning of production line equipment. The invention realizes the automatic packaging of the butter hot pot bottom material, improves the productivity, and avoids the pollution of the product by manual operation.

The invention provides a vertical tube outer falling film evaporator. The vertical tube outer falling film evaporator comprises an outer shell, a material inlet channel is arranged at the top of the outer shell in a penetrating manner; a material outlet channel is arranged at the bottom of the outer shell; a distribution disc and a falling film evaporation unit are sequentially arranged in the outer shell in the downward direction of the material inlet channel; the falling film evaporation unit comprises a first tube plate, a second tube plate and at least one single-head heat exchange tube. In the use process of the vertical tube outer falling film evaporator, materials uniformly form a film on the outer surface of the heat exchange tube, so that the phenomena of scaling and blockage caused by evaporation in the heat exchange tube are solved, meanwhile, the flow area of the materials is also increased, and the pressure drop is reduced; in addition, gas channels are arranged between the heat exchange tube bundles in the vertical tube outer falling film evaporator, generated gas can be led out of the tube bundles, and the pressure drop of cold side fluid is further reduced.

The invention discloses a reflux liquid inlet device for a high-load anaerobic reactor, which comprises an anaerobic reactor, wherein the upper end of the anaerobic reactor is connected with a water outlet pipeline which is connected with a pipe circulating pump, the circulating pump is connected to a mixing device through a pipeline, the mixing device enters the bottom of the anaerobic reactor through a liquid inlet pipe, and an anaerobic liquid inlet pump is connected to the mixing device through a pipeline. The mixing device comprises a mixing cavity, the center of the top of the mixing cavity is provided with an inlet for wastewater to be treated, the middle at the right side of the mixing cavity is provided with a circulating water inlet which is connected with a nozzle positioned inthe mixing cavity, and an external nozzle is arranged outside the mixing cavity. The invention changes the traditional multi-point water inlet mode of the anaerobic bioreactor.

A screening device for petroleum contaminated soil treatment belongs to the technical field of contaminated soil treatment and comprises a limiting frame, a screening mechanism is mounted in the limiting frame and comprises a base, a mesh screen, a plurality of mounting plates and a plurality of first connecting rods, and the mounting plates and the first connecting rods form a rotating frame. The rotating frame is connected to the outer surface of the mesh screen in a sleeving mode, a plurality of screen holes are evenly distributed in the mesh screen, a rotating ring is rotationally connected to the base, the rotating frame is rotationally connected with the base through the rotating ring, and through arrangement of the screening mechanism, an impact block is arranged on the screening mechanism, and a first driving motor is used for controlling a first rotating rod to rotate; the first rotating rod is driven to rotate to drive an impact block fixedly connected to the first rotating rod in a sleeving mode to shake, in the shaking process of the impact block, the inner side wall of the mesh screen can be knocked, an acting force opposite to the screening direction is provided for the mesh screen, and therefore the permeability of the mesh screen in the screening process can be improved, and certain progressive significance is achieved.

The invention discloses a reflux liquid inlet device for a high-load anaerobic reactor, which comprises an anaerobic reactor, wherein the upper end of the anaerobic reactor is connected with a water outlet pipeline which is connected with a pipe circulating pump, the circulating pump is connected to a mixing device through a pipeline, the mixing device enters the bottom of the anaerobic reactor through a liquid inlet pipe, and an anaerobic liquid inlet pump is connected to the mixing device through a pipeline. The mixing device comprises a mixing cavity, the center of the top of the mixing cavity is provided with an inlet for wastewater to be treated, the middle at the right side of the mixing cavity is provided with a circulating water inlet which is connected with a nozzle positioned in the mixing cavity, and an external nozzle is arranged outside the mixing cavity. The invention changes the traditional multi-point water inlet mode of the anaerobic bioreactor.

The invention relates to a building drainage structure capable of reducing blockage, and relates to the technical field of drainage devices.The building drainage structure comprises a sub-drainage pipe arranged in a foundation, the sub-drainage pipe is connected with a main drainage pipe, a filter plate is arranged in the sub-drainage pipe, a plurality of filter holes are formed in the filter plate, a supporting rod is fixedly arranged in the sub-drainage pipe, and the supporting rod is connected with the main drainage pipe. A cleaning rod is arranged on the supporting rod; a guide rod is arranged on the supporting rod, the guide rod penetrates through the filter plate, the guide rod is sleeved with an abutting spring, the side wall of the sub drainage pipe is connected with an auxiliary drainage pipe, the auxiliary drainage pipe is located below the filter plate, and the auxiliary drainage pipe is communicated with the main drainage pipe; a blocking piece is arranged in the auxiliary drainage pipe and used for blocking impurities in the auxiliary drainage pipe. The device has the effects that the phenomenon of drainage blockage is reduced, and accumulated impurities are automatically recycled.

The invention relates to the field of forestry related machinery, in particular to a pinecone picking device for a forest area. The pinecone picking device comprises a middle mounting plate, moving mechanisms, a lifting mechanism, a buffering mechanism, a swing picking mechanism and a cutting-off assembly, wherein the four moving mechanisms are arranged, and uniformly and fixedly arranged at the bottom of the middle mounting plate, the lifting mechanism is fixedly arranged on the middle mounting plate, the buffering mechanism is fixedly arranged on the lifting mechanism, the swing picking mechanism is fixedly arranged on the buffering mechanism, and the cutting-off assembly is fixedly arranged on the swing picking mechanism. The device has the function of adapting to mountainous terrains,it is guaranteed that the device can conduct picking work on the uneven ground, pinecones which is not located right above the device can be picked, and the picked pinecones have the falling bufferingfunction and further have the anti-blocking function at the same time.

The invention discloses a spreading device for silver carp processing and capable of controlling the product quantity conveniently. The spreading device comprises a support frame and a second motor. Aconveying belt is rotationally arranged on the inner side of the support frame. Fixed rods are fixed to the front and rear sides of a storage box correspondingly through welding. An adjusting plate is connected to the lower end of a connecting plate in a clamped mode, and the lower surface of the adjusting plate is of a zigzag structure. A first fixed plate is in fixedly bolted connection to theright end of the support frame. A driving block is slidably installed on the inner side of a fixed groove. A support plate is fixedly welded to the lower surface of a follower plate. Second fixed plates are symmetrically arranged on the front and rear sides of a spreading plate. A connecting block is installed in an anti-off groove in a clamped mode. Through the spreading device for silver carp processing and capable of controlling the product quantity conveniently, the problems that according to a currently used spreading device for silver carp processing, the quantity of silver carps entering the conveying belt is controlled, a blocking phenomenon is liable to appear, and the silver carps are damaged due to collision of the silver carps and a spreading plate are solved.

The invention relates to a control method for agriculture and forestry spraying low-altitude flight of a large freight unmanned aerial vehicle, the agriculture and forestry spraying is achieved by controlling the unmanned aerial vehicle and a liquid storage tank, the unmanned aerial vehicle comprises an unmanned aerial vehicle shell, rotor wing rods are fixedly connected to the periphery of the unmanned aerial vehicle shell, and spraying pipes are rotatably connected to the bottom ends of the rotor wing rods; the top end of the spraying pipe is connected with a rotor wing rod in a penetrating mode, spraying holes are formed in the bottom end of the spraying pipe, balls are rotationally connected into the spraying holes, the spraying pipe is of a hollow structure, and the top end of the spraying pipe is connected with the rotor wing rod in a penetrating mode. The method belongs to the technical field of the unmanned aerial vehicles, the unmanned aerial vehicle is connected with the spraying pipe, the centrifugal force generated by the high-speed rotation of the spraying pipe can throw out the sprayed liquid medicine, so that the spraying range of the spraying liquid is increased, the spraying area of the unmanned aerial vehicle is enhanced, meanwhile, the centrifugal force generated by rotating the spraying pipe can effectively reduce the probability that the spraying liquid flows down in strands, and the spraying uniformity of the spraying liquid is effectively enhanced.

The invention belongs to the technical field of medical instruments, and particularly relates to an internal fixation stomach tube capable of preventing regurgitation and aspiration, which comprises a stomach tube main body, the stomach tube main body is provided with an outflow port, an air bag, an air delivery tube and a liquid scraping ring, and the liquid scraping ring is provided with a connecting rope. A food injection connector is arranged at one end of the stomach tube body, a connecting piece is arranged on one side of the food injection connector, a plug cap is arranged on the connecting piece, a conveying cavity is formed in the stomach tube body, an air conveying cavity is formed in the stomach tube body, and an anti-sticking layer is laid on the inner wall of the conveying cavity. The internal fixation stomach tube is provided with the air bag, pressure is applied to the inner wall of the esophagus through the expansion pressure of the air bag, so that the effect of internally fixing the stomach tube is achieved, the fixing effect is good, the non-planned tube drawing phenomenon can be reduced, meanwhile, the air bag blocks the esophagus, and regurgitation and aspiration of gastric contents are prevented.