57results about How to "Guaranteed centrality" patented technology

The invention provides a three-dimensional framework fast extraction method based on branch feathers, which comprises the following steps: firstly, automatically extracting root points and tip end points of a tree type voxel model; then, carrying out seed point distance conversion on the root points and the tip end points of the voxel model; automatically judging the branching feathers and optimizing cutting surfaces according to the growth strategy of regions from the root points or the tip end points; decomposing an object into meaningful components with reasonable delimitation between components; and finally, extracting voxel component frameworks and connecting the voxel component frameworks into a structural framework of the object. The framework fast extraction method based on branch feathers is fast and effectively, and the structural integral frameworks maintain topological structures of the original voxel model, and can not generate fracture and redundant complicated branches. The actual plant model construction is carried out on the basis of the framework, the actual scanning data can be processed, and the invention has the anti-noise capability and has high reconstruction accuracy. The test on a plurality of data sets proves that the invention is applicable to bodies with annular structures and can process surface voxel models and solid voxel models.

The invention discloses a skeleton extraction method of a human body point cloud model. The skeleton extraction method is characterized by being implemented according to the following steps: a first step of obtaining skeleton points of a human body model based on a slice idea, connecting skeleton points, and generating a model initial curve skeleton; a second step of roughly optimizing the initial curve skeleton, and removing extra bifurcation points and internal branches caused by noise points or holes; and a third step of performing refined optimization on the model curve skeleton by inserting interpolation points on a skeleton line to be optimized to obtain final skeleton information. The skeleton extraction method of the human body point cloud model according to the invention solves the problems that the prior art is only applicable to a specific model or an ideal state is hard to achieve for all properties of the skeleton model curve, and can automatically complete the skeleton extraction of the human body point cloud model.

The invention relates to a vertical tube type falling-film evaporator. The vertical tube type falling-film evaporator comprises an upper tube box, a lower tube box, a casing, multiple heat exchange tubes, an upper tube plate and a lower tube plate, wherein a solution inlet and a secondary steam outlet I are arranged at the upper tube box, a concentrated liquid outlet and a secondary steam outlet II are arranged at the lower tube box, a steam inlet is arranged at the upper part of the casing, and a condensed water outlet is arranged at the lower part of the casing; a film distributing device used for distributing a solution on the inner walls of the heat exchange tubes is arranged in the upper tube box; the film distributing device comprises a liquid bearing plate, a liquid feeding plate, a liquid distributing plate and liquid guiding tubes. By means of a steam stripping effect generated by secondary steam and liquid films, the heat transferring push force and the evaporation efficiency are increased. The liquid films can be uniformly distributed by the film distributing device, the film forming is stable, the wall drying phenomenon is avoided, the recovery rate of secondary steam produced in an evaporator is high, the recovery is convenient, and the heat transferring efficiency is improved.

The present invention discloses a film-builder used for seed-coating agent, which is a copolymer produced by initiation and co-polymerization of AMPS monomer and at least one vinyl monomer. In the co-polymer, mole percentage of AMPS monomer is from 0.5% to 30%, and the balance is vinyl monomer, wherein the vinyl monomer is chosen from acrylic ester or metacrylic acid ester or vinyl acetate or phenyl ethylene or acrylic amide. The film-builder has good film building and sustained-release function, high film building strength, water adsorb and resistance, and chemical stability, and favorable biocompatibility with agronomic crop. The shedding rate of seed lagging cover after drying low, film after absorbing water and expansion ventilated and not dissolvable, active ingredient can be released slowly, and favorable growing microenvironment for plant especially crops can be produced.

The invention discloses a breeding method of barbus capito. The method comprises the following steps that A, a breeding pond is built and divided into the three breeding areas including the fry area,the small fish area and the large fish area through two fishing nets; B, fry are bred in the fry area, and fry feed is added to the fry area; C, the water temperature of the breeding pond is controlled, oxygen dissolution is conducted, feeding is conducted three times every day, the fish school is driven at regular time, the mobility of the fish school is improved, and the density of the fish school is controlled; D, harvesting is conducted when the weight of each fish reaches 650-750 g. By adopting the method, by enlarging the activity range and improving the physique of the fry, the survivalrate is guaranteed, by driving the fish school at regular time, the uniformity of the fish school in all the breeding areas is improved, the reasonable feed adding means is beneficial to dispersion of the fish school, most fry identical in specification can be gathered in any area through partition breeding, the feeding concentricity is guaranteed, and the feeding effect is improved.

The invention discloses a pressure test method and apparatus for a business system. The method comprises the steps of obtaining test account configuration file information, wherein the test account configuration file information includes account information of multiple test accounts; generating multiple pieces of login request information according to the test account configuration file information to log in the business system to generate multiple pieces of login conversation information; storing the account information of the test accounts and the multiple pieces of the login conversation information in a memory mapping table; when the business system is subjected to pressure testing, generating multiple business pressure test requests according to the account information of the test accounts; and according to the business pressure test requests and the memory mapping table, generating multiple pieces of business pressure test request data, and sending the multiple pieces of the business pressure test request data to the business system so as to perform the pressure testing on the business system. According to the method, login parts of the test accounts are executed separately, so that the concentricity of the pressure testing of the business system is ensured.

The invention belongs to the technical field of engineering machinery equipment leasing, and discloses an on-line one-stop rental service system for engineering machinery which comprises a leasing terminal, an SAAS management platform and a leased terminal. A rental terminal and a rented terminal are respectively service software formulated on the SAAS management platform by an equipment renter and an equipment user, and a rental system layer matched with the rental terminal and the rented terminal is constructed on the SAAS management platform. The leasing system layer comprises a database module, an optimization matching module, a storage module and an encryption backup module. The traditional engineering machinery leasing is combined with the SAAS network platform. An online and offlineintegrated leasing mode is formed, and the leasing information of leasing parties is automatically optimized and matched in the whole system, so that the problem that the leasing information is too messy is effectively eliminated, the communication time of the leasing parties is greatly saved, the communication cost is reduced, and the leasing efficiency is improved.

The invention discloses a 5A06 aluminum alloy pipe butt welding method. An aluminum-magnesium alloy pipe has the wall thickness of 5-10 mm. The welding method comprises the steps of pre-welding treatment, welding, and post-welding, wherein the pre-welding treatment comprises workpiece preheating, welding gun preheating, and cleaning of the workpiece and a welding wire; argon tungsten-arc welding is adopted for the welding process; the technological parameters of the welding process are as follows: a welded joint is in the form of a V-shaped butt groove, the welding level is 2 layers and 2 passes, the electric current of backing welding is 150+ / -5A, the electric current of cosmetic welding is 130+ / -5A, and the gas flow is 10-15L / min; the tungsten electrode is a cerium-tungsten electrode andhas the diameter of 2.4-3.0mm; the brand of the welding wire is HS331; the model of the welding wire is SAIMg-5Ti; the welding wire has the diameter of 2.4mm; and the polarity of a power source is alternating current. The welding method can improve the quality of a welding seam, and ensures that no defects such as pores, cracks, incomplete penetration, and welding seam collapse are generated.

The invention relates to a full-automatic welding machine for small filter elements. The full-automatic welding machine comprises a rack, a filter element clamp, an end cover clamp, a filter element clamp guide rail, a heating support, a filter element heating plate, an end cover heating plate, a servo motor and a moving air cylinder. The end cover clamp is located in the rack and used for storingend covers. The filter element clamp guide rail is arranged in the rack. The filter element clamp is connected to the filter element clamp guide rail in a sliding manner and used for storing the filter elements. The servo motor is used for driving the filter element clamp to move up and down on the filter element clamp guide rail. The filter element clamp and the end cover clamp are arranged in an upper and lower spaced manner and are parallel to each other. The heating support is arranged in the rack and located between the filter element clamp and the end cover clamp. The filter element heating plate and the end cover heating plate are arranged on the upper side and the lower side of the heating support and used for heating the filter elements and the end covers correspondingly. The moving air cylinder is connected with the heating support and used for driving the heating support to move front and back. According to the full-automatic welding machine, the filter element clamp and the end cover clamp are very convenient to replace, the filter elements of various forms can be welded, and locating is accurate.

The invention discloses a check tool for a front fender, which comprises a base, a limit pile, a pillar, a positioning plate, two front positioning columns and a rear positioning column. The limit pile is fixed at the front end of the base and is vertical to the base; the positioning plate is mounted at the rear end of the base through the pillar; the two front positioning columns are arranged at the front end of the upper plate surface of the positioning plate juxtaposedly; a rear positioning column is arranged at the rear part of the upper plate surface of the positioning plate; and the front positioning columns and the rear positioning column are parallel to the limit pile and are distributed in an isosceles triangle. The invention can greatly improve the quality detection speed and the accuracy of the front fender produced by motorcycle enterprises during the ex-factory and ensure that the quality of the front fender satisfies the requirements, thereby effectively improving the assembly speed of the front fender and satisfying the requirements of conformity production. Meanwhile, the installation center of the front fender is ensured and the deflection of the front fender is avoided, thereby the use performance and the decoration effect of the front fender are guaranteed.

The invention provides a cigarette making machine online cutting-derivation correcting device. The device comprises a cigarette making machine frame, a cigarette paper tensioning device arranged on the frame, four cigarette paper front or middle adjusting devices, a wire band regulator, a front paper tape rack assembly, a rear paper tape rack assembly, and a plurality of paper tape conveying rollers which are parallel to each other. Each cigarette paper front or middle adjusting device comprises a step-shaped core shaft, which is fixed on the frame and has a smaller diameter of the external end, a cigarette paper middle adjusting roller and a spring are arranged on a position from the external end to one step surface on the core shaft, the external end surface of the cigarette paper middle adjusting roller is pinned by an adjusting screw which is arranged in the screw hole in the external end of the core shaft, the external side surface of the cigarette middle adjusting roller is provided with a ring of groove, and the two internal corners of the groove are two inverted rounded angles with an equal semi-diameter. The online cutting-derivation correcting device has a good derivation correcting effect on double-track integral cigarette paper, does not scratch the cigarette paper, reduces the equipment failure rate of a cigarette making machine, and guarantees the production efficiency of the cigarette making machine and the product quality.

The invention discloses a bathroom shower with adjustable showering area, and relates to the technical field of bathroom products. The bathroom shower comprises a housing; a water inlet pipe is fixedly mounted at the top of the housing; a water outlet disk is connected with the bottom of the housing through a connecting piece; a water distribution main pipe rotationally communicates with the innerwall of the water inlet pipe through a bearing; the peripheral surface of the water distribution main pipe is rotationally connected with the housing through a connecting piece; one end of the waterdistribution main pipe extends out of the housing; the inner wall of the housing is fixedly connected with a water distribution supporting seat; the inner wall of the water distribution supporting seat is rotationally connected with the water distribution main pipe through a connecting piece; a group of water distribution branch pipes rotationally communicate with the top surface of the water distribution supporting seat; driven gears are fixedly connected to the peripheral surfaces of the water distribution branch pipes; and showering pipes fixedly communicate with the peripheral surfaces ofthe water distribution branch pipes. Through the rotational design of the water distribution main pipe and the arrangement design of the showering pipes, when the bathroom shower is used, the water distribution main pipe rotates to drive the showering pipes to be changed in angle synchronously, so that the showering area formed by the showering pipes is increased.

The invention relates to the field of cooking range infrastructures, in particular to an energy-saving cooking range. The energy-saving cooking range comprises a hearth, and more than three flame guide ribs circumferentially and uniformly distributed along an internal wall of the hearth, wherein the hearth is in a cylindrical or bowl-shaped structure; a gas distributing disk and an ignition part matched with the gas distributing disk for ignition are arranged at the bottom of the hearth; the energy-saving cooking range is provided with air inlets used for allowing air to enter in the hearth and / or in a position where the gas distributing disk is matched with the hearth; the flame guide ribs extend from the bottom of the hearth to the top of the hearth sequentially; and arrangement directions of the flame guide ribs are different from a generatrix direction of the hearth. According to the energy-saving cooking range, a flow-through route of a flame can be changed by an artificially designed flame path, so that a purpose of prolonging the attachment time of the flame on the internal wall of the hearth can be achieved; an effect of improving heat exchange is further exerted; the energy-saving cooking range is simple in structure and convenient to realize; and the low manufacturing cost and the low use cost of the energy-saving cooking range can be ensured effectively.

The invention discloses a high-safety LED lamp based on metallic mercury expansion and heat dissipation. The high-safety LED lamp comprises a mounting base; heat conduction containing grooves are evenly and fixedly connected to the periphery, close to the lower portion, in a side mounting cover; a heat conduction column is fixedly connected to the position, close to the heat conduction containinggroove, outside the side installation cover; a heat dissipation mercury groove is fixedly connected to the position, close to the upper portion, outside the side mounting cover; a transmission threaded rod penetrates through and is in threaded connection with the interior of an adjusting sleeve groove; and the top end of the transmission threaded rod is rotationally connected with a control chip;the output end of the control chip is fixedly connected with a light emitting diode; the two sides of the top of the mounting base are fixedly connected with exhaust heat dissipation mechanisms correspondingly; heat dissipation holes are formed in the bottom of the mounting base; and the exhaust heat dissipation mechanisms are correspondingly communicated with the heat dissipation holes. The invention relates to the technical field of LED lamps. According to the high-safety LED lamp based on metallic mercury expansion and heat dissipation, the heat conduction capacity of mercury is high, and therefore rapid heat dissipation of the LED lamp is achieved.

The invention discloses a drip irrigation dripper capable of discharging water stably. The drip irrigation dripper capable of discharging the water stably is characterized in that an end cap is arranged at one end of a body, a piston is connected to the inner part of the body in a sliding mode, a supporting column is connected to one side of the piston, a first spring is connected to the other side of the piston, and the other end of the first spring is connected with the end cap; a spacer sleeve is arranged on one side in the body, the outer wall of the spacer sleeve is attached to the inner wall of the body, a plurality of connecting rods are arranged at one end of the spacer sleeve, and one end of each connecting rod is connected with the supporting column; a plurality of through water dripping holes are formed in the side wall of the body, the spacer sleeve is located on one side of the water dripping holes, a connector is arranged at one end of the body, a water inlet pipe is connected to one side of the connector, and one end of the water inlet pipe is connected with a capillary pipe. According to the drip irrigation dripper capable of discharging the water stably, the piston is arranged in the body, the spacer sleeve is arranged on one side of the piston, the multiple water dripping holes are formed in the side wall of the body, and the first spring is arranged at one end of the piston; when the water pressure changes, the piston moves up and down under the action of the pressure of the water and the elastic force of the first spring, so that the number of the water dripping holes for discharging the water is controlled, and the water outlet stability of the dripper is ensured.

The invention discloses drilling equipment with a hole expanding function. The drilling equipment comprises a machine body, a clamping cavity is formed in the machine body, supporting bases are fixedly arranged on the left side and the right side of the clamping cavity correspondingly, supporting columns are slidably connected in the supporting bases, supporting springs are connected between the supporting columns and the supporting bases, a main body is fixedly arranged between the supporting columns, and a clamping device for clamping a workpiece is arranged in the machine body. According tothe drilling equipment, the accuracy of drilling in position and vertical direction can be guaranteed, hole expanding machining can be carried out during drilling, tool replacement is avoided, and the machining speed and the machining efficiency are improved.

The invention discloses a hydraulic holding hook short-connection assembly for an engineering drilling machine. The problems that in the prior art, when an engineering drilling machine works, a drill rod and a drilling tool are inconvenient to splice, and time and labor are consumed are solved. The hydraulic holding hook short-connection assembly comprises a hydraulic holding hook pipe seat, a rotating device, a lifting device, a drill rod holding seat and a holding device. By means of the hydraulic holding hook short-connection assembly, automatic splicing can be achieved when the drill rod is spliced for the engineering drilling machine, the splicing efficiency is improved, and the time cost is saved; the center position of a lower side connector can be adjusted through an upper flange, then the center position of the drill rod is adjusted, and the center position of the drill rod and the center position of the drilling tool are located on the same perpendicular line; the rotating device and the lifting device are arranged, the lower end of the drill rod can be spliced to the drilling tool or separated from the drilling tool through the rotating device and the lifting device, and automatic splicing or disassembling of the drill rod and the drilling tool is achieved; and meanwhile, the drill rod holding seat is arranged and used for locking or unlocking a holding rod, and the holding rod is prevented from falling in the splicing process.

The invention relates to the technical field of transmission gears, in particular to a transmission gear of a washing machine. Gear concentricity can be well guaranteed, and the transmission effect is good. The transmission gear of the washing machine comprises an upper gear housing and a lower gear housing, and the upper gear housing and the lower gear housing are fixedly buckled to form a gear mounting cavity. The transmission gear of the washing machine is characterized in that an inner gear ring is arranged on the inner wall of the lower gear housing; one end of an input shaft penetrates through the lower gear housing to stretch into the gear mounting cavity, and a center gear is fixedly mounted at the end, located in the gear mounting cavity, of the input shaft; one end of an output shaft penetrates through the upper gear housing to stretch into the gear mounting cavity, an upper planetary plate is fixedly mounted at the end, located in the gear mounting cavity, of the output shaft, and the input shaft is movably sleeved with a lower planetary plate which is matched with the upper planetary plate; a planetary gear matched with the center gear and the inner gear ring is arranged around the center gear, the planetary gear is mounted between the upper planetary plate and the lower planetary plate through a planet wheel axle, and bearing devices are mounted between the input shaft and the lower gear housing and between the output shaft and the upper gear housing respectively.

The invention provides a multifunctional baking light for nursing department. The multifunctional baking light comprises movable wheels, a movable base, a fixed rod, an adjusting sleeve, a connectingshaft, a mounting seat, an adjusting bolt, an anti-explosion baking light structure, a baking light adjustable rod structure, a power cord with a plug, a wiring terminal, a U-shaped motor base, a telescopic rod, a fixed sleeve, a fastening bolt, a cooling and heating alternating fan and an angle adjusting rail structure, wherein the movable wheels are arranged at four corners of the bottom of themovable base by virtue of bolts; the fixed rod is longitudinally welded in the middle of the upper side of the movable base; and the adjusting sleeve longitudinally sleeves the upper side of the fixedrod. The multifunctional baking light provided by the invention not only can achieve a therapy function but also has functions of cooling in summer and heating and preserving heat in winter; meanwhile, the height and irradiating angle of the baking light can be also adjusted conveniently; and in addition, the multifunctional baking light has a light focusing function and an anti-explosion function; therefore, the multifunctional baking light is convenient to use and is safe and convenient to use.

The invention relates to a seed chuck used in the process of growth of sapphire and aims to provide a sapphire seed chuck with double positioning pins. The sapphire seed chuck comprises a connector, a transition section and a connection nut, wherein one end of the connector is provided with a screw, a fine pitch internal thread is arranged in the screw, the other end the connector is provided with an installation groove, two sides of the installation groove are respectively provided with at least one pinhole, one end of the transition section is provided with a fine pitch external thread matching with the fine pitch internal thread of the connector, the root of the fine pitch internal thread is provided with a tool withdrawal groove, the connection nut is sleeved on the other end of the transition section, and a contact-making surface of the connection nut and the transition section comprises a conical surface. According to the invention, the size of the installation groove matches with that of a seed, and the center line of the seed coincides with the center line of the seed chuck; a conical surface with a degree of 45 DEG is employed for cooperation between the connection nut and the transition section, so concentricity with an upper shaft is guaranteed after installation; center lines of the double positioning pinholes are located on an installation groove line, so contact stress is dispersed, fracture of the seed is effectively prevented, and convenient processing is realized.

The invention discloses a centrifugal oat stir-frying device and a stir-frying process and belongs to the technical field of oat processing. The stir-frying device comprises at least two stir-frying pans fixed in a stepped mode, rotary stirring devices located at the upper portions of the stir-frying pans and used for circumferentially stirring oats in the stir-frying pans and heating device for heating the stir-frying pans, wherein a collecting opening is arranged between the two adjacent stir-frying pans and is a channel for leading the oats to enter the low-position stir-frying pan from the high-position stir-frying pan, and an oat delivery pipe is arranged at the upper portion of the stir-frying pan at the highest position. The oat stir-frying process is performed in the centrifugal oat stir-frying device. Production line type operation is adopted, a rotary stir-frying mode makes stir-frying uniform, the automation degree is high, the labor intensity is reduced, and the working efficiency is improved.

The invention discloses a tunnel gravel transfer device and a construction method thereof, belongs to the field of shield tunnel transfer, and solves the problems that in the prior art, the gravel transfer efficiency is not high, only one carrier loader can be loaded at a time due to the limitation of the arm length of a mechanical arm of an excavator, and continuous gravel transfer cannot be realized. The tunnel gravel transfer device comprises a belt conveyor, wherein a belt conveyor fixing frame is fixedly arranged at one end of the belt conveyor, a belt conveying vehicle is fixed to the bottom of the belt conveyor fixing frame, and a conveying highway-railway dual-purpose vehicle set is arranged at one end of the conveying vehicle. According to the tunnel gravel transfer device and the construction method thereof, the belt conveyor is matched with the highway-railway dual-purpose vehicle set, so that efficient transfer of gravel is achieved; and through switching of steel rail wheels and highway wheels in the highway-railway dual-purpose vehicle set, the conveying vehicle set can conduct low-energy-consumption transportation on steel rails in a tunnel and can also conduct transportation on a road surface without steel rail laying.

The invention discloses a dust removal device and a dust removal method, the dust removal device comprises a movably arranged dust removal assembly and an air blowing device, the dust removal assembly comprises a dust removal box body used for filtering dust, a dust suction pipe connected to the air inlet end of the dust removal box body and an induced draft fan connected to the air outlet end of the dust removal box body; a second dust sensor for detecting the concentration of dust outside the dust suction pipe and a first dust sensor for detecting the concentration of dust in the dust suction pipe are arranged on the dust suction pipe; the dust removal box body and the induced draft fan are both configured to be started according to a detection result of the second dust sensor and closed according to the detection result of a first dust sensor; and the induced draft fan is provided with an induced draft fan outlet, and the induced draft fan outlet comprises a lateral outlet used for blowing air to one end of the blasting face and an axial outlet used for blowing air to one end away from the blasting face. When the device is used, the dust removal device does not need to be moved back and forth, inlet and outlet pipelines do not need to be connected, water is not needed, secondary pollution is avoided, the structure is simple, and the practicability is high.

The invention discloses a method for extracting a skeleton of a branching feature of a plant root system, comprising the following steps: (1) acquiring an image: acquiring a CT sequence diagram of a cross-sectional tomographic sequence of a plant root system; (2) positioning the CT sequence diagram of a branched root segment : Using the remaining convex hull area detection technology, the CT contour of the root system is divided into the contour with branch and the contour without branch; (3) Region separation: the concave point detection and segmentation method is used to separate the contour with branch; ( 4) Main root bifurcation CT sequence map positioning: select the appropriate opening operation and roundness threshold to locate the main root bifurcation CT sequence map; (5) Skeleton extraction: use the CT contour centroid point at the beginning of the main root bifurcation, and not Three-dimensional curve interpolation fitting is carried out on the grain points of the CT sequence diagram of the sub-root segment containing branches, and a root system skeleton with better effect is obtained. The invention can automatically identify the bifurcation characteristics according to the CT sequence diagram of the root system, and perform interpolation fitting after region separation and positioning of the main root bifurcation characteristic section, greatly simplifying the operation.

The invention provides a cigarette making machine online cutting-derivation correcting device. The device comprises a cigarette making machine frame, a cigarette paper tensioning device arranged on the frame, four cigarette paper front or middle adjusting devices, a wire band regulator, a front paper tape rack assembly, a rear paper tape rack assembly, and a plurality of paper tape conveying rollers which are parallel to each other. Each cigarette paper front or middle adjusting device comprises a step-shaped core shaft, which is fixed on the frame and has a smaller diameter of the external end, a cigarette paper middle adjusting roller and a spring are arranged on a position from the external end to one step surface on the core shaft, the external end surface of the cigarette paper middle adjusting roller is pinned by an adjusting screw which is arranged in the screw hole in the external end of the core shaft, the external side surface of the cigarette middle adjusting roller is provided with a ring of groove, and the two internal corners of the groove are two inverted rounded angles with an equal semi-diameter. The online cutting-derivation correcting device has a good derivation correcting effect on double-track integral cigarette paper, does not scratch the cigarette paper, reduces the equipment failure rate of a cigarette making machine, and guarantees the production efficiency of the cigarette making machine and the product quality.

The invention relates to the field of drip irrigation tape production, and discloses a double-flow-channel filtering die head and screen structure suitable for reclaimed material production, the double-flow-channel filtering die head and screen structure comprises a machine shell, the feeding end of the machine shell is connected with an extruder, and a single-pass flow channel capable of dividing fluid in two paths is arranged in the machine shell; the filter assemblies are arranged on the single-pass runners respectively, and the tail ends of the single-pass runners are converged into the extrusion die head; when the machine is not stopped, the extrusion die head and the screen of the filtering assembly can be replaced through the screen replacing mechanism; the device is reasonable in design, convenient to disassemble and assemble, controllable in flow direction, stable in filtration, stable in extrusion, convenient and fast in screen replacement, safe, reliable, energy-saving, consumption-reducing, quality-improving and efficiency-improving; the production cost is reduced, and the impurity removal effect is improved; on the premise of backflow prevention and self-adaptive pressure adjustment, the process of non-stop net replacement and the process of continuous output of the drip irrigation tape are guaranteed.