1701results about How to "Solve the blockage" patented technology

The invention relates to a fat cutting filter, a fat cutting filtering method and a fat cutting filtering device.The fat cutting filter comprises a shell, the interior of the shell is a treatment cavity, and the shell is provided with a first connector and a second connector which communicate with the treatment cavity; the cutting part is located in the treatment cavity and located between the first connector and the second connector, the cutting part comprises a rigid silk screen used for cutting fat, and the silk diameter of the rigid silk screen ranges from 0.05 mm to 1 mm. The mesh wires of the rigid silk screen are used for fat cutting, the structure is simple, operation is easy, convenient and efficient, the machining cost is low, the mesh diameter can be customized according to needs, the porosity can reach 90% or above, the cutting efficiency is high, and the problem of filtering blockage during fat cutting can be effectively solved.

The invention provides an artificial groundwater recharge system and method based on roof rainwater collection, and relates to the technical field of groundwater recharge. The system comprises a rainwater recycling unit, a rainwater purifying unit and a rainwater recharging unit which are connected in sequence, and the rainwater recycling unit is used for collecting roof rainwater; the rainwater purifying unit is used for purifying the collected rainwater, and the rainwater recharging unit is used for inputting the purified rainwater into an underground aquifer. A set of feasible manual supply and recharge technical system is constructed, and various aspects of manual supply are organically integrated and connected, so that the water quality of recharged rainwater can be improved, the underground water supply quality is effectively ensured, the supply efficiency of a manual supply project can be maintained or improved, and the blockage risk is reduced; the time for keeping high-efficiency recharge of manual supply is prolonged, and then the recharge water amount is increased.

The invention provides a precipitation device for polyaluminum chloride production, and relates to the technical field of sewage treatment.The precipitation device comprises a concentration box, three mixing boxes are arranged at the top of the concentration box, water inlet pipes are arranged at the tops of the mixing boxes, the lower ends of the water inlet pipes are closed, and connecting assemblies are arranged between the water inlet pipes and the mixing boxes and comprise top plates; compared with the prior art, the device has the advantages that the water inlet pipe is connected with the three mixing boxes, and wastewater fed by the water inlet pipe is fed into the different mixing boxes in batches to be mixed with a quantitative coagulant through cooperation of the connecting assembly and the driving assembly; feeding of the next group of mixing boxes can be performed while reaction time is given, the total waiting time is shortened, the screening assembly and the driving assembly are matched to facilitate separation of wastewater and precipitates, the blockage problem is avoided, the precipitates are convenient to clean, and the wastewater treatment efficiency is improved.

The invention discloses a mountain tunnel waterproof and drainage structure convenient to maintain and replace and a construction method.The waterproof and drainage structure comprises a primary support, a secondary lining, detachable water guiding and drainage structures and a tunnel bottom drainage structure, an annular groove is reserved in a secondary lining construction joint, and the water guiding and drainage structures are intensively arranged; the water guiding and draining structure comprises a water draining pipe, an annular water draining groove, a water-wave-proof steel pattern plate, a heat preservation material and a decorative plate which are sequentially arranged from outside to inside. The bottom drainage structure comprises transverse drainage ditches and a central drainage ditch. According to the tunnel waterproof and drainage structure, the underground water behind the tunnel lining is basically drained through the capacity of the water drainage pipe for actively reducing the underground water, the underground water is prevented from acting on the supporting structure, permeation of the underground water into the supporting structure is reduced, the construction method is simple and convenient, and the construction quality is easy to control; during tunnel operation and maintenance, desilting, maintenance and replacement are facilitated, and the durability of the tunnel is improved.

The invention belongs to the technical field of micro-reaction, and particularly relates to a micro-mixer and a method for continuously preparing nano cooling liquid. Comprising a reaction cavity in which a plurality of reaction flow channels are arranged, all the reaction flow channels are used for preparing nano cooling liquid and are vertically arranged in the reaction cavity in a three-dimensional spiral shape, and each reaction flow channel is internally provided with a plurality of disturbance structures and a plurality of distributors which are arranged in the reaction cavity and located above all the reaction flow channels, each distributor is connected with the inlets of all the reaction flow channels, the collectors are arranged at the outlets of all the reaction flow channels, and pressure regulating structures are arranged in the collectors. According to the invention, the distributor is adopted to enable the reaction fluid to flow into the corresponding reaction flow channel, the three-dimensional spiral flow channel design in the reaction cavity is folded in space, so that the overall size of the microreactor is not too large, and a disturbance structure is arranged in each reaction flow channel, so that the mixing efficiency can be further improved; the production rate of the microreactor is improved, and blockage in a flow channel is avoided.

The invention relates to the technical field of computer communication, and discloses a non-blocking crossbar scheduling device, method, equipment and medium in PCIe, and the device comprises a flow control module, an entrance arbitration module, a scheduling module and an exit arbitration module. The entrance arbitration module obtains a credit value of an exit side of the device through the flow control module, and performs order-preserving scheduling and port scheduling on the received target data according to the credit value; and after the scheduling module performs inter-module scheduling on the plurality of inlet arbitration modules, the outlet arbitration module sends the target data to the outlet port of the group outlet module through the outlet side according to the inter-module scheduling result. And scheduling the target data according to the cache condition of the exit side. According to the invention, the scheduled data can be ensured to have a corresponding cache space at the exit, so that the problem of head-of-queue blocking in scheduling is solved.

The invention provides a medical community work assisting device which comprises two supports, a water spraying pipe, a water conveying pipe and two spray heads, and a cleaning mechanism used for cleaning the spray heads is arranged on the outer front side of the water spraying pipe. The dredging assembly can linearly reciprocate back and forth through the execution assembly in the cleaning mechanism, the dredging assembly can directly act on the nozzle, blockages are rapidly and thoroughly removed through physical acting force, and automatic cleaning of spray holes of the spray head is achieved; the problem of nozzle blockage caused by disinfection liquid residues or external impurity accumulation is effectively avoided, the continuity and uniformity of spraying disinfection are guaranteed, the dredging effect is further enhanced through the synergistic effect of the optimization assembly, the optimization assembly can drive the dredging rod and the cleaning brush on the surface of the dredging rod to rotate while the dredging rod is used for dredging, and the dredging effect is improved. When the cleaning brush rotates, the contact area between the cleaning brush and the inner wall of the nozzle can be better increased, and tiny parts of the inner wall of the nozzle can be touched.

The invention discloses natural resource survey data acquisition and monitoring equipment, and relates to the technical field of natural resource monitoring, the natural resource survey data acquisition and monitoring equipment comprises a floating platform, the upper surface of the floating platform is fixedly provided with a waterproof box, the waterproof box is internally provided with a data processing box, and one side surface of the data processing box is provided with a connecting wire; the other end of the connecting wire is connected with a turbidity detector body, a bottom filter cylinder is further arranged on the bottom surface of the floating platform, and a bottom induction opening of the turbidity detector body is located in the center of the upper surface of the bottom filter cylinder; an illumination table is arranged on the inner bottom surface of the detection frame body, a lighting lamp is arranged below the illumination table, and a water pressing plate matched with the illumination table is arranged at the center of the upper surface of the detection frame body, in the scheme, by arranging the detection mechanism, the influence of excessive impurities and bubbles on detection is avoided, and data in a water sample can be more accurately collected.

The invention discloses a sewage purification and reuse treatment system based on a sewage pipe network, relates to the technical field of sewage purification of the sewage pipe network, and is used for solving the problems that factory sewage is not subjected to preliminary purification treatment, pipeline pressure building and blockage are easily caused in the discharge process, and part of sewage is caused to be mixed in the pipe. Sewage in a factory discharge pipeline is classified, monitored and treated, suspended organic impurities in the sewage are preliminarily intercepted by mounting filter elements in filter cartridges, the filter cartridges in a filter material mechanism are combined and mounted, when the filter elements filter loads, pressure is actively relieved by moving a pressing sleeve and a slag discharge hole, and the filter elements can be automatically blocked under the follow-up work of an electric control box. The movement of a motor and an air cylinder in the fixing frame is controlled in time, the rotation of a rotating shaft on the side of a corresponding filter drum is completed, the angle adjustment of a sealing plate in a through pipe is realized, the flow direction of sewage in the pipeline is adjusted in time, and the problem of pipeline blockage caused by continuous untreated sewage discharge is avoided.

The invention provides a system and method for recharging underground water by coupling urban rain and flood resources, and belongs to the technical field of underground water recharging. The system comprises a roof rainwater recycling mechanism, a road surface rainwater recycling mechanism, a regulating reservoir, a rainwater purifying mechanism, a rainwater recharging mechanism and the like. Coupling collection of road surface rainwater and roof rainwater is achieved, the roof rainwater recycling mechanism and the road surface rainwater recycling mechanism both have the flow discarding function, so that the collected rainwater is relatively clean, the quality of recharged rainwater can be improved through further treatment of the rainwater purification mechanism, and the groundwater supply quality is effectively guaranteed. According to the system, the combination effect of all units is good, comprehensive rainwater collection and more scientific utilization of collected rainwater can be achieved, and a new thought is provided for rainwater and flood resource reutilization.

The invention discloses a green deodorization method suitable for ultramicro sea cucumber powder, and belongs to the field of food processing. The method comprises the following steps: S1, putting sea cucumber coarse powder into an extraction kettle of a supercritical extraction instrument, and deodorizing the sea cucumber powder; s2, crushing the sea cucumber powder subjected to fishy smell removal in the step S1 by using an ultrafine crusher to obtain sea cucumber powder, and controlling the bulk density of the powder to be 0.65-0.7 g / mL and the tap density to be 0.70-0.80 g / mL; and S3, putting the sea cucumber powder subjected to superfine grinding in the step S2 into an extraction kettle of a supercritical extraction instrument for deodorization. According to the invention, the second hole disc is additionally arranged on the gas distributor in the supercritical extraction instrument, so that carbon dioxide fluid flows back during extraction, the pressure of the carbon dioxide fluid discharged from the material basket is reduced, and the material is prevented from being taken out, thereby solving the problem of pipeline blockage of ultra-micro powder and improving the extraction efficiency and the production efficiency.

The utility model discloses an anti-blocking device of a discharging bin, which relates to the technical field of bin blocking prevention and comprises a fixing sleeve, a support frame is fixedly mounted in the fixing sleeve, a vibration mechanism is fixedly mounted in the middle of the support frame at the upper end, a power source is fixedly mounted in the middle of the support frame at the lower end, and the vibration mechanism comprises a shell. An upper end cover is rotatably connected to the interior of the shell, a lower end cover is fixedly connected to the interior of the shell, a touch rod is slidably connected to the middle of the upper end cover in a sleeved mode, a wrapping sleeve is arranged in the shell, and the bottom end of the touch rod is sleeved with the wrapping sleeve. And the bottom end of the touch rod is provided with an annular convex block, so that the touch rod is extruded to move up and down while rotating, the powder can be knocked to fall off, and the problem that the powder is blocked at the discharge hole can be solved.

The invention relates to the technical field of agricultural machinery, in particular to a multifunctional fruit huller. Comprising a case, and an eccentric rolling and screening device, a spiral screening and conveying device, a drying device and a collecting device which are mounted in the case from top to bottom; the eccentric rolling and screening device is provided with an eccentric rolling roller and a screening barrel and is used for rolling and screening fruits, then the fruits are conveyed to the drying device through the spiral screening and conveying device, and the drying device is used for drying the seeds and conveying the seeds into the collecting device; the motor and the transmission device are installed in the machine box, and the motor drives the eccentric rolling and screening device and the spiral screening and conveying device to operate through the transmission device. The device can be conveniently carried to mountainous areas where fruit trees live, fruits can be hulled on site after being picked, transportation is convenient, and the hulled seeds can be dried.

The utility model relates to the technical field of waste gas treatment equipment, in particular to dust removal waste gas purification treatment equipment which comprises a waste gas box, a filter screen and a cleaning assembly, the filter screen is installed in the waste gas box, and the cleaning assembly comprises a guide rod, a movable frame, a supporting component, a brush plate and a driving component. The guide rod is arranged in the waste gas box and located on the side, close to the filter screen, of the waste gas box, the movable frame is arranged on the outer side of the guide rod in a sleeving mode and slidably connected with the guide rod, the brush plate is connected with the movable frame through the supporting component, the supporting component is installed on the movable frame and supports the brush plate, and the driving component drives the movable frame to move. However, a cleaning device is not arranged, so that the filter screen is easily blocked.

The invention relates to the technical field of multi-stage micro powder sieves, in particular to a laminated multi-stage micro powder sieve which comprises a mounting base, supporting legs are fixedly mounted on the upper side of the mounting base in an array mode, first mounting blocks are fixedly mounted on the upper sides of the two sets of supporting legs, and driving motors are fixedly mounted at the upper ends of the first mounting blocks; a first flange plate is fixedly mounted at the end of an output shaft of the driving motor, a second flange plate is arranged on the first flange plate, first screw rods are fixedly mounted on the second flange plate in an array manner, the first screw rods are inserted into the first flange plate, and first screw sleeves are mounted at the ends of the first screw rods through threads. The device is divided into an upper layer and a lower layer, so that the device has the effect of screening particles with different diameters, a second polarization block is arranged at the differential screen on the lower side, and the second polarization block can perform higher-frequency vibration on the differential screen on the lower side at a higher rotating speed.

The invention, which relates to the field of FPGA and machine learning, discloses a high-flow-degree MambaV2 hardware acceleration system with an optimized calculation sequence based on FPGA, comprising a preceding stage module, a tensor expansion module, a hidden layer state calculation module, an output state calculation module, a residual multiplication normalization module and an output linear layer module. The calculation process of the MambaV2 algorithm is divided into a plurality of pipeline levels, and a data stream is output in a pipeline form. According to the method, an original algorithm structure is not changed, the operation sequence of a hidden layer state equation in an original algorithm is changed, an algorithm for optimizing the calculation sequence is provided, the number of times of operation is reduced, cache consumption is reduced, the MambaV2 model is deployed and reasoned on an FPGA, the edge scene deployment requirement is met, customized acceleration of the FPGA is utilized, and data streams are adjusted, so that the edge scene deployment efficiency is improved. The pipeline design of the whole algorithm is realized, the utilization rate of computing resources is improved, the problem of data blocking is solved, and computing delay and cache consumption are reduced.

The invention discloses an aircraft sky-ground correlation characterization method, device and equipment and a storage medium, and relates to the technical field of aerodynamics, and the method comprises the steps: determining the current hidden variable characterization based on the preset hidden variable data of an aircraft, constructing a current total element sample set by using the current hidden variable representation, the preset aerodynamic performance index of the aircraft and the aircraft state data; the preset hidden variable data comprises sky flight test environment data, wind tunnel test environment data and aircraft appearance characteristic data; carrying out model training by utilizing a preset deep learning model and the current total element sample set, and carrying out generalization error evaluation; resampling the preset hidden variable data based on the evaluation result, and rejumping to the step of constructing the current total element sample set by using new current quantity representation so as to construct a target second-order optimization curved surface; and taking the minimized generalization error as a target, and determining target hidden variable representation and a target heaven and earth correlation prediction model based on the target second-order optimization curved surface. And the interpretability is improved.

The invention relates to a coarse particle fluidized bed column separation kinetic analysis device and method, belongs to the technical field of mineral processing and resource recovery, and solves the problem that fluidized bed column separation kinetic analysis is difficult to systematically develop. The device comprises a fluidized bed column, a filling medium, a slurry supply unit, a water supply unit and a gas supply unit, the fluidized bed column comprises a barrel body, the filling medium is arranged in the barrel body, the volume of the filling medium is reduced from bottom to top in a layered mode, the slurry supply unit comprises a slurry mixing barrel and a first conveying pipeline, and the first conveying pipeline is communicated with the slurry mixing barrel and the top of the barrel body; and the water supply unit is communicated with the air supply unit and then communicated with the lower part of the barrel body. According to the invention, the multi-element and multi-scale filling medium is adopted to disperse fluid and assist fluidization, and is limited between the two screens, so that the use amount of clear water and materials is reduced, a fluidized bed column separation dynamic test is optimized from the aspect of structure, the follow-up wastewater treatment amount of coarse grain mineral fluidized bed column separation of an actual separation plant is reduced, and the production cost is reduced. And the production cost of a selection plant is saved.

The invention relates to the technical field of carbon dioxide recovery waste gas purification, in particular to waste gas purification equipment for carbon dioxide recovery and a purification method thereof.The waste gas purification equipment for carbon dioxide recovery comprises a shell assembly and further comprises a slag removal assembly, and the slag removal assembly comprises a fixed cylinder and a rotating part; the rotating component comprises a slag removal motor, a first stirring plate and a second stirring plate, a fan-shaped shell is fixedly mounted at the bottom of the outer cylinder, a water outlet part is arranged at the bottom of the fan-shaped shell, and a collecting component is arranged in the fan-shaped shell, and the waste gas purification method for carbon dioxide recovery comprises the steps of spraying, purification and the like. The device has the advantages that sediments in the lime water are continuously removed in the waste gas purification process, the negative influence of sediment accumulation on the sulfur dioxide removal efficiency is avoided, sulfur dioxide in the waste gas is effectively purified, corrosion of the sulfur dioxide to subsequent carbon dioxide recovery equipment is reduced, and the reliability and the safety of a whole waste gas treatment system are improved.

The invention discloses a mercaptan odor treatment reaction device, and belongs to the technical field of gas purification equipment, the mercaptan odor treatment reaction device comprises a treatment box, two ends of the treatment box are respectively fixedly provided with a gas inlet pipe and a discharge pipe which are communicated with the interior of the treatment box, the inner side wall of the treatment box is fixedly provided with a filter plate, and the side wall of the top end of the treatment box is slidably connected with a sliding rod; a lower connecting plate located in the treatment box is fixed to the bottom end of the sliding rod, a cleaning and brushing assembly for cleaning the filter plate is arranged on one side of the lower connecting plate, a moving assembly is arranged outside the treatment box, and a cleaning and dredging assembly is arranged at the bottom of the lower connecting plate. The cleaning and dredging assembly blows air to the filter plate, so that filter holes in the filter plate are further cleaned and dredged through airflow, the cleaning effect on the filter plate is improved, and the air circulation efficiency is further improved; the waste gas is primarily filtered and purified by the filter plate, continuously and sequentially flows through the plurality of purification plates, and is discharged from the gas inlet pipe after being subjected to multiple sufficient purification treatment, so that the rapid and sufficient purification treatment on the mercaptan odor is completed.

The invention relates to a hard rock tunneling and supporting miner-bolter, which belongs to the technical field of miner-bolter, and comprises a machine body erected on a crawler belt, the middle part of the machine body is provided with a miner-bolter mechanism for crushing and tunneling hard rock, the machine body is provided with a flow guide mechanism and a conveying belt for discharging broken stones, and the top is provided with a supporting mechanism for providing temporary support; the digging and anchoring mechanism comprises a cap-shaped rotating frame, the levelness is adjusted through a first oil cylinder, the front portion of the rotating frame is connected with a pitching frame, and a second oil cylinder is used for adjusting the pitching angle. A rotating shaft is arranged on the pitching frame, a tunneling head is connected into the rotating shaft, stone jacking hammers are symmetrically arranged on the two sides of the tunneling head, and the supporting mechanism is a rock crushing cone and provided with a rotatable conical protruding part. A gravel separating disc is arranged at the rear part of the rock crushing cone, grinding balls are uniformly distributed on the gravel separating disc, and the gravel separating disc can vertically move for grinding and guiding small gravels; by means of innovative structural design and function integration, various pain points in a traditional bolter miner supporting technology are solved, and the efficiency and safety of hard rock tunnel tunneling and supporting are greatly improved.

The invention provides an anti-residue bar screen machine, and belongs to the technical field of sewage treatment equipment. Comprising a rack, a motor seat frame is installed on the top of the rack, a motor is installed on the top of the motor seat frame, a water blocking plate is installed at one end of the bottom of the rack, a bottom trash blocking grating is installed on the inner wall of the bottom of the rack, a slag supporting baffle is arranged on the top of the bottom trash blocking grating, and a transmission chain is installed on the inner wall of the rack. A small tooth rake is installed on the inner wall of the transmission chain, and a medium tooth rake is installed on the inner wall of the transmission chain. By arranging the lifting hook assembly and the decontamination adjusting assembly, linear garbage and large plastic garbage with high plasticity are cleaned, garbage accumulation is prevented, machine disabling and damage caused by garbage accumulation are avoided, the number of times of secondary cleaning is reduced, manpower is saved, the operation cost is reduced, the service life of the machine is prolonged, and the working efficiency is improved. And meanwhile, the efficient and rapid cleaning effect of the machine is improved.

The invention relates to the technical field of waste gas treatment, in particular to injection molding equipment with a waste gas pretreatment and purification mechanism. The injection molding equipment comprises an injection molding equipment body, a pretreatment tank is arranged on one side of the injection molding equipment body, a dust removal and purification assembly is arranged in the pretreatment tank, and a liquid storage tank is fixedly connected to the bottom of the pretreatment tank; a stirring assembly is arranged in the liquid storage tank; in the injection molding waste gas extraction process, by means of rotation of the rotating rod, the multiple dust removal filter plates are driven to be alternately and circularly used, it is ensured that large-particle impurities are continuously and efficiently blocked in turn in the filtering process, and the replacement frequency of cooling water is prevented from being increased; the stirring assembly can be promoted to be matched with the stirring blades on the rotating rod, generation of large bubbles is eliminated, dissolution of small-particle impurities is promoted, the retention time of waste gas in cooling water is prolonged, then the small-particle impurity removal effect is improved, and in addition, during purification and discharging, impurities on the dust removal filter plate can be synchronously subjected to back flushing cleaning and collection.

The utility model provides spraying equipment which comprises a spraying pipe, spraying holes are formed in the spraying pipe, and the spraying pipe is used for spraying a pickling solution to a copper foil through the spraying holes; the heating device is arranged on the peripheral side of the spraying pipe, the heating device is used for heating the pickling solution in the spraying pipe to form a high-temperature pickling solution, and the high-temperature pickling solution is used for dissolving crystals at the spraying holes. According to the spraying equipment provided by the embodiment of the invention, crystals at the spraying holes of the spraying pipe on the spraying equipment can be cleaned, and the spraying uniformity of the surface of the copper foil is improved.

The utility model discloses a dam slope protection structure based on water conservancy and hydropower engineering design, and belongs to the field of dam slope protection, the dam slope protection structure comprises a slope protection body, a square groove is formed in the top of the slope protection body, a gravel layer is laid on the inner wall of the square groove, a water falling groove is formed in the bottom of the square groove, and a through hole is formed in the bottom of the water falling groove; a water storage bin is formed in the bottom of the through hole, a water pump is fixedly assembled in an inner cavity of the water storage bin, and the output end of the water pump is fixedly connected with a water pipe; collected water is primarily filtered through the gravel layer, and then the water can flow through the filter plate to be filtered again, so that the water can be stored in an inner cavity of the water storage bin, large impurities cannot be in contact with the filter plate through the gravel layer, and the problem that branches and foreign matter are easily clamped into the hole diameter of the filter screen, so that the service life of the filter screen is prolonged is solved. And a gravel layer is shoveled, and then a pull ring is pulled, so that the filter plate can be quickly taken out of an external position, and the filter plate is cleaned.

The invention belongs to the technical field of environmental protection equipment, and particularly discloses a zeolite rotating wheel for treating styrene-containing organic waste gas. The zeolite rotating wheel comprises an anti-polymerization wheel core, a VOCs wheel core and a connecting shaft; the anti-inhibition wheel core is provided with a porous channel structure penetrating front and back, and an anti-inhibition molecular sieve is loaded on the inner wall of the channel; the VOCs wheel core is attached to the rear portion of the anti-polymerization wheel core and is provided with a porous channel structure penetrating front and back, a zeolite molecular sieve is loaded on the inner wall of the channel, and the connecting shaft penetrates through the anti-polymerization wheel core and the VOCs wheel core to connect the anti-polymerization wheel core and the VOCs wheel core in series and fixedly connect the anti-polymerization wheel core and the VOCs wheel core. According to the present invention, the efficient adsorption and concentration of the easily-polymerized styrene component and the conventional non-methane total hydrocarbon can be achieved, the requirements of the chemical industry, the plastic industry, the printing industry, the coating industry and other industries on the styrene-containing and non-methane total hydrocarbon-containing waste gas working condition treatment are met, the purification effect of the styrene-containing organic waste gas is substantially improved, and the service life of the equipment is substantially prolonged.

The invention discloses high-purity oxamide with concentrated particle size and spherical morphology, a preparation method of the high-purity oxamide and application of the high-purity oxamide in preparation of a slow-release fertilizer, and belongs to the technical field of oxamide synthesis and application. The method comprises the following steps: mixing an ammonia-alcohol solution and an alcohol ester solution, conveying the mixed solution into a series tubular reactor for reaction, and then conveying the mixed solution into a parallel tubular reactor for reaction after pressure stabilization and flow equalization to obtain a reaction solution containing oxamide; performing flash evaporation on the reaction liquid to obtain flash evaporation liquid and flash evaporation gas, and performing solid-liquid separation on the flash evaporation liquid to obtain solid oxamide and filtrate; and drying the solid oxamide to obtain the oxamide. The method realizes high conversion rate and high purity, and the product has ultrafine particle size distribution. The purity of the prepared oxamide is greater than or equal to 99%, the D50 particle size is concentrated to 50 + / -15 microns, the spherical morphology is uniform, the release is stable, and the oxamide has a very good effect in preparation of long-acting slow-release fertilizers and combustion inhibitors and research on the nitrogen utilization rate.

The utility model discloses an ear and nasal cavity stent assembly which comprises a catheter, the catheter is provided with a first end and a second end, the catheter is provided with at least two balloons, the radial sizes of the at least two balloons are sequentially increased after the balloons are expanded, and the catheter is communicated with each balloon; the at least two balloons at least comprise a first balloon and a second balloon, the radial size of the expanded second balloon is larger than that of the expanded first balloon, and the first balloon is located on the side, facing the first end, of the second balloon.

The invention provides an anti-blocking method and a control system for a Yellow River diversion drip irrigation intelligent pressure adjusting water dropper, belongs to the technical field of drip irrigation intelligent adjustment, and ensures that the system can effectively operate under various working conditions through a dynamic adjustment function and continuous optimization of pressurization parameter combination. After each blockage is solved, a new pressurization parameter combination is recorded into the controller for future use. Along with the continuous use of the drip irrigation system, when the pressurization mode of the previous test cannot solve the problem of blockage, the system needs to increase the pressurization time or the pressurization amplitude on the basis of the previous pressurization mode to carry out a new round of test, and uses a new pressurization mode to solve the problem of blockage.

The invention discloses a manufacturing process of a novel TPU (thermoplastic polyurethane) film laminated composite fabric with a cleaning structure, which comprises a manufacturing box, a first guide roller, a second guide roller, a conveying roller, a heating roller and a composite roller which are used for conveying a TPU film and fabric base cloth are symmetrically arranged in the manufacturing box, and an air inlet plate is mounted at the top of the inner side of the manufacturing box; a plurality of groups of air inlet nozzles are formed in the air inlet plate, the air inlet plate communicates with a purification box arranged at the top of the outer side of the manufacturing box, a first driving motor is installed in an air outlet of the purification box, a driving shaft is installed at the output end of the first driving motor, and the driving shaft can drive the first exhaust fan blades to rotate. According to the manufacturing process of the novel TPU film laminated composite fabric with the cleaning structure, the device aims to solve the problems that the composite surface of a TPU film and a fabric cannot be cleaned in the existing TPU film and fabric compounding process, and waste gas is easily generated in the compounding heating process and is harmful to human bodies, and an air inlet plate is mounted at the top of the inner side of a manufacturing box.