CN109682725B - Parameter-adjustable micro-droplet generation device and application method thereof - Google Patents
Parameter-adjustable micro-droplet generation device and application method thereof Download PDFInfo
- Publication number
- CN109682725B CN109682725B CN201910109075.6A CN201910109075A CN109682725B CN 109682725 B CN109682725 B CN 109682725B CN 201910109075 A CN201910109075 A CN 201910109075A CN 109682725 B CN109682725 B CN 109682725B
- Authority
- CN
- China
- Prior art keywords
- droplet
- liquid
- micro
- ball screw
- sliding table
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 239000011521 glass Substances 0.000 claims abstract description 33
- 238000001125 extrusion Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 145
- 229920001296 polysiloxane Polymers 0.000 claims description 52
- 239000007921 spray Substances 0.000 claims description 52
- 230000002572 peristaltic effect Effects 0.000 claims description 26
- 238000012937 correction Methods 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000003814 drug Substances 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000033001 locomotion Effects 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000000520 microinjection Methods 0.000 claims 1
- 239000000575 pesticide Substances 0.000 abstract description 18
- 230000004927 fusion Effects 0.000 abstract description 7
- 239000000447 pesticide residue Substances 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 9
- 238000009736 wetting Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004033 diameter control Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N2013/003—Diffusion; diffusivity between liquids
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nozzles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a parameter-adjustable tiny droplet generation device, which comprises a mounting frame (1), wherein a droplet extrusion mechanism, a speed control mechanism and a stage (2) are arranged on the mounting frame (1), a nozzle (3) of the droplet extrusion mechanism is positioned right above the stage (2) and is positioned at the outlet end of a hollow glass tube (4) serving as an airflow channel in the speed control mechanism, and the tiny droplet generation device controls the diameter of droplets, the number of single droplets and the droplet dropping speed through the speed control mechanism. The micro droplet generator can generate single or multiple pesticide droplets with controllable diameter and controllable speed, can be widely used for researching the influence of droplet speed and diameter on the diffusion condition of the droplets on the plant surface and testing the pesticide characteristics, and can also be used for researching the collision fusion phenomenon of the multiple droplets so as to provide a theoretical basis for reducing pesticide use and pesticide residues later, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of agriculture, in particular to a pesticide droplet generating device used in the field of plant protection, and specifically relates to a parameter-adjustable tiny droplet generating device and a using method thereof; the device can generate pesticide droplets with different diameters and different speeds, predicts the influence of the diameter and the speed of the droplets on the wetting characteristics of the pesticide droplets on the plant surface, and can realize the collision fusion phenomenon of a plurality of droplets so as to provide a theoretical basis for reducing pesticide use and pesticide residues.
Background
The process of wetting the plant surface by the pesticide liquid drops belongs to the problem of liquid drops striking the solid surface, which is a free surface flow problem in fluid mechanics, and the research on the problem of liquid drops striking the surface has important theoretical and practical significance, and the obtained result can be used for guiding the development of spraying machinery. And droplet diameter and droplet impact velocity are the main influencing factors affecting the wetting characteristics of the pesticide droplets. The Chinese patent with the application number 201710846594.1 discloses a single liquid drop generating device for the field of plant protection, which is used for generating single liquid drops and providing voltage signals for piezoelectric copper sheets through a voltage signal generator so as to enable the piezoelectric copper sheets to vibrate and generate tiny liquid drops. Meanwhile, the droplet speed that can be achieved by the device is not described. The Chinese patent with the application number 201310415264.9 discloses a device and a method for generating spray droplets with quantitative diameter by using a drive motor to drive a screw rod to drive a slider on the screw rod to push a droplet generator to generate spray droplets. Meanwhile, the droplet speed that can be achieved by the device is not described.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a parameter-adjustable tiny droplet generation device and a using method thereof, wherein the device can generate pesticide droplets with different diameters and different speeds, predicts the influence of the diameters and the speeds of the droplets on the wetting characteristics of the pesticide droplets on the plant surface, and can realize the collision fusion phenomenon of a plurality of droplets so as to provide a theoretical basis for reducing pesticide use and pesticide residues.
The invention aims at solving the problems through the following technical scheme:
A parameter-adjustable micro-droplet generation device comprises a mounting frame and is characterized in that a droplet extrusion mechanism, a speed control mechanism and a stage are arranged on the mounting frame, a nozzle of the droplet extrusion mechanism is positioned right above the stage and is positioned at the outlet end of a hollow glass tube serving as an air flow channel in the speed control mechanism, and the micro-droplet generation device controls the diameter of droplets, the number of single droplets and the dropping speed of the droplets through the speed control mechanism.
The speed control mechanism comprises a peristaltic pump, a gas transmission silicone tube and a hollow glass tube, wherein the peristaltic pump, the gas transmission silicone tube and the hollow glass tube are horizontally arranged, one end of the gas transmission silicone tube is connected with an air flow outlet of the peristaltic pump, the other end of the gas transmission silicone tube is connected with the top end of the hollow glass tube in a sealing mode, stable air flow generated by the peristaltic pump reaches the hollow glass tube through the gas transmission silicone tube, and the air flow endows the liquid drop speed sprayed by the spray head.
The liquid drop extrusion mechanism comprises a liquid inlet ball screw sliding table, a push plate, a microsyringe, a liquid drop silicone tube and a spray head, wherein the liquid inlet ball screw sliding table is arranged at the top of the installation frame, the push plate is arranged on a travelling part of the liquid inlet ball screw sliding table, the push plate is arranged at the tail end of the microsyringe, the liquid inlet ball screw sliding table pushes the microsyringe through the push plate to realize generation of tiny liquid drops, the inlet end of the liquid drop silicone tube is communicated with the tiny liquid drop generation end of the microsyringe, the outlet end of the liquid drop silicone tube is connected with the inlet end of the spray head, and the microsyringe, the liquid drop silicone tube and the spray head form the tiny liquid drop supply mechanism.
The microsyringes are arranged on a microsyringe fixing frame of the liquid inlet ball screw sliding table, the front end of each microsyringe is provided with a liquid drop silicone tube and a spray head which are matched with the microsyringes one by one, and the microsyringes, the liquid drop silicone tubes and the spray heads which are corresponding to each other form a plurality of groups of tiny liquid drop supply mechanisms so as to realize the generation of multiple liquid drops.
The micro droplet supply mechanism is provided with a diverter, the diverter comprises a three-way joint, the inlet end of the three-way joint is respectively communicated with the micro droplet generation ends of the corresponding micro sample injectors, one outlet end of the three-way joint is communicated with one end of a droplet silicone tube with a control switch, the other outlet end of the three-way joint is communicated with one end of a diverter tube with the control switch, and the feeding of the feed liquid ball screw sliding table can be enabled to supply single micro droplets or a plurality of micro droplets through the arrangement of the diverter.
The device is characterized in that the mounting frame is also provided with a vertical ball screw sliding table and a horizontal ball screw sliding table, the vertical ball screw sliding table and the horizontal ball screw sliding table are vertically arranged, a moving part of the vertical ball screw sliding table is provided with a fixing frame, a hollow glass tube is fixedly arranged on the fixing frame through a clamping frame, a spray head is arranged on a rotating shaft, the rotating shaft is arranged on the fixing frame through a set screw, the spray head can adjust the direction through rotation of the rotating shaft, the objective table is arranged on the moving part of the horizontal ball screw sliding table, and through up-down relative displacement of the vertical ball screw sliding table and left-right relative displacement of the horizontal ball screw sliding table, the position change of a sample on the objective table relative to the spray head and the change of drop height of a drop can be realized.
The spray heads are obliquely arranged downwards relative to the horizontal plane, and when the spray heads are arranged, the spray heads are uniformly arranged along the circumferential direction of the hollow glass tube.
The application method of the parameter-adjustable micro-droplet generation device is characterized in that the method for generating the micro-droplets with the determined diameters by the device comprises the following steps:
A1, filling the microsyringe, the liquid drop silica tube and the spray head with liquid medicine, and fixing the microsyringe by using a microsyringe fixing frame;
a2, a driving motor of a liquid inlet ball screw sliding table works, the screw rotates and converts the screw into linear motion, the tail end of the microsyringe is pushed by a push plate, and liquid with the corresponding volume of liquid drops with the required diameter is released from a spray head;
A3, measuring the diameter d of the released liquid drop, and calculating a diameter correction coefficient k d of the released liquid drop according to a formula corresponding to the diameter of the liquid drop, wherein the formula is as follows: Wherein x is the feeding amount of a liquid inlet ball screw sliding table, V L is the measuring range of the microsyringe, L is the corresponding length of the measuring range of the microsyringe, k d is a diameter correction coefficient, and d is the diameter of liquid drops;
And A4, determining the feeding amount x k of the new feeding ball screw sliding table meeting the requirements according to the calculated diameter correction coefficient k d, and regenerating liquid drops with the required diameter according to x k.
The microsyringe, the liquid drop silicone tube and the spray head in the step (A1) are filled with liquid medicine, namely when the microsyringe, the liquid drop silicone tube and the spray head are filled with liquid medicine, a control switch on the corresponding liquid drop silicone tube is required to be opened according to the number of the required liquid drops.
The application method of the parameter-adjustable micro droplet generation device is characterized in that the method for endowing the droplet with a given speed comprises the following steps:
B1, starting a peristaltic pump after the liquid drops with the determined diameters are released;
b2, injecting the flow of the speed required by the liquid drop with the determined diameter into the hollow glass tube through a peristaltic pump;
B3, measuring the speed V of the released liquid drop with the determined diameter, and calculating a speed correction coefficient k v of the released liquid drop with the determined diameter according to a formula corresponding to the speed of the liquid drop, wherein the formula is V=15k vπD2 V, V is the flow, D is the inner diameter of the glass tube, V is the speed of the liquid drop, and k v is the speed correction coefficient;
And B4, determining the flow V k of the peristaltic pump which is new to meet the requirements according to the calculated speed correction coefficient k v, and regenerating the required droplet speed according to V k.
Compared with the prior art, the invention has the following advantages:
The parameter-adjustable micro-droplet generating device mainly comprises four parts, namely a droplet diameter control part, a multi-droplet generating part, a speed control part and a moving platform part, wherein the device can generate single droplets with a given speed, so that the state of the pesticide droplets falling on plant leaves can be detected, the influence of different diameters and different speeds of the droplets on the wetting characteristics of the droplets on the surfaces of the plant leaves is studied, and a plurality of droplet collision fusion phenomena can be observed, so that a theoretical basis is provided for reducing pesticide use and pesticide residues.
Drawings
FIG. 1 is a schematic diagram of the front view of a parameter-adjustable micro-droplet generator of the present invention;
FIG. 2 is a schematic diagram of the axial structure of the device for generating micro-droplets with adjustable parameters;
FIG. 3 is a partial device diagram of a droplet extrusion mechanism in the device of the present invention;
FIG. 4 is a top view of the relative positions of the spray heads in the apparatus of the present invention;
FIG. 5 is a front view of the relative position of the spray head in the apparatus of the present invention;
FIG. 6 is a schematic view of the diverter in the apparatus of the present invention;
FIG. 7 is a schematic diagram of a droplet diameter control section in the apparatus of the present invention;
FIG. 8 is a diagram of the steps of a method for imparting a given velocity to a droplet by the apparatus of the present invention.
The device comprises a mounting frame 1, a 2-objective table, a 3-spray head, a 4-hollow glass tube, a 5-peristaltic pump, a 6-gas silicone tube, a 7-liquid inlet ball screw sliding table, an 8-push plate, a 9-microsyringe, a 10-liquid drop silicone tube, a 11-microsyringe fixing frame, a 12-shunt, a 13-three-way joint, a 14-control switch, a 15-shunt tube, a 16-vertical ball screw sliding table, a 17-transverse ball screw sliding table, a 18-fixing frame, a 19-clamping frame, a 20-rotating shaft and a 21-set screw.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in figures 1-6, the parameter-adjustable micro-droplet generation device comprises a mounting frame 1, wherein a droplet extrusion mechanism, a speed control mechanism and a stage 2 are arranged on the mounting frame 1, a nozzle 3 of the droplet extrusion mechanism is positioned right above the stage 2 and at the outlet end of a hollow glass tube 4 serving as an air flow channel in the speed control mechanism, and the micro-droplet generation device controls the diameter of droplets, the number of single droplets and the dropping speed of the droplets through the speed control mechanism. The device comprises a mounting frame 1, a vertical ball screw sliding table 16 and a horizontal ball screw sliding table 17, wherein the vertical ball screw sliding table 16 and the horizontal ball screw sliding table 17 are vertically arranged, a fixing frame 18 is arranged on a travelling part of the vertical ball screw sliding table 16, a hollow glass tube 4 is fixedly arranged on the fixing frame 18 through a clamping frame 19, a spray head 3 is arranged on a rotating shaft 20, the rotating shaft 20 is arranged on the fixing frame 18 through a set screw 21, the spray head 3 can adjust the direction through rotation of the rotating shaft 20, the position of the spray head 3 relative to the hollow glass tube 4 is changed, a stage 2 is arranged on the travelling part of the horizontal ball screw sliding table 17, and through the up-down relative displacement of the vertical ball screw sliding table 16 and the left-right relative displacement of the horizontal ball screw sliding table 17, the position change of a sample on the stage 2 relative to the spray head 3 and the drop height change can be realized.
As shown in figures 1-2, the speed control mechanism comprises a peristaltic pump 5, a gas transmission silicone tube 6 and a hollow glass tube 4 which are horizontally arranged, wherein one end of the gas transmission silicone tube 6 is connected with an air flow outlet of the peristaltic pump 5, and the other end of the gas transmission silicone tube is connected with the top end of the hollow glass tube 4 in a sealing way, and when the speed control mechanism is used, stable air flow generated by the peristaltic pump 5 reaches the hollow glass tube 4 through the gas transmission silicone tube 6, and the air flow gives the liquid drop speed sprayed by the spray head 3.
As shown in fig. 1-3, the droplet extrusion mechanism comprises a liquid inlet ball screw sliding table 7, a push plate 8, a microsyringe 9, a droplet silicone tube 10 and a nozzle 3 which are arranged at the top of a mounting frame 1, wherein the push plate 8 is arranged on a travelling part of the liquid inlet ball screw sliding table 7, the push plate 8 is arranged at the tail end of the microsyringe 9, the liquid inlet ball screw sliding table 7 pushes the microsyringe 9 through the push plate 8 to realize generation of tiny droplets, the inlet end of the droplet silicone tube 10 is communicated with the tiny droplet generation end of the microsyringe 9, and the outlet end of the droplet silicone tube 10 is connected with the inlet end of the nozzle 3, so that the microsyringe 9, the droplet silicone tube 10 and the nozzle 3 form a tiny droplet supply mechanism. The microsyringes 9 are arranged on a microsyringe fixing frame 11 of the liquid inlet ball screw sliding table 7, the front end of each microsyringe 9 is provided with a liquid drop silicone tube 10 and a spray head 3 which are matched with each other one by one, and the microsyringes 9, the liquid drop silicone tubes 10 and the spray heads 3 which are in one-to-one correspondence form a plurality of groups of tiny liquid drop supply mechanisms so as to realize the generation of multiple liquid drops. As shown in fig. 6, in the micro droplet supply mechanism, a diverter 12 is provided, the diverter 12 includes a three-way joint 13, the inlet ends of the three-way joint 13 are respectively communicated with the micro droplet generation ends of the corresponding micro-sampler 9, one outlet end of the three-way joint 13 is communicated with one end of a droplet silicone tube 10 with a control switch 14, and the other outlet end thereof is communicated with one end of a diverter tube 15 with the control switch 14, the feeding of the feed ball screw slipway 7 can be enabled to supply single micro droplet or a plurality of micro droplets by the arrangement of the diverter 12, and as shown in fig. 1-2, the falling of single droplet and the collision fusion of two or three droplets can be achieved by the control of the three diverters 12. As shown in fig. 4, the shower heads 3 are disposed obliquely downward with respect to the horizontal plane, and when a plurality of shower heads 3 are disposed, the shower heads 3 are uniformly arranged along the circumferential direction of the hollow glass tube 4.
In the technical scheme provided by the invention, the droplet diameter control part is realized by horizontally arranging the liquid inlet ball screw sliding table 7, arranging the microsyringe fixing frame 11 on the liquid inlet ball screw sliding table 7 and fixedly connecting the microsyringe fixing frame with the liquid inlet ball screw sliding table 7 through a bolt, ensuring the microsyringe 9 and the liquid inlet ball screw sliding table 7 to be horizontal, connecting the microsyringe 9 with the nozzle 3 through a droplet silicone tube 10, and controlling the feeding amount of the liquid inlet ball screw sliding table 7 to push the microsyringe 9 to realize droplet diameter control. The driving motor of the liquid inlet ball screw sliding table 7 adopts a 57-step motor, a 1.8-degree stepping angle is adopted, the length of a machine body is 596mm, the motor is connected with the ball screw through a coupler, the high transmission precision of the ball screw is guaranteed, the ball screw adopts 1204-500, the diameter of the ball screw is 12mm, the screw pitch is 4mm, namely, the motor rotates one circle of the ball screw to walk for 4mm, the effective stroke is 500mm, the minimum propelling precision is 0.02mm, and the generation of single pesticide drops of 100-500 microns can be completed.
The multi-drop generation part is realized by adding a diverter 12 between the microsyringe 9 and the spray head 3, realizing the generation of single drops, two drops and three drops by controlling a control switch 14 on the diverter 12, and realizing the collision fusion of the drops by changing the position of the spray head 3 relative to the hollow glass tube 4.
The speed control part is realized by connecting a peristaltic pump 5 with a gas transmission silicone tube 6, and connecting the gas transmission silicone tube 6 with a hollow glass tube 4. The control of the droplet velocity is achieved by controlling the flow rate of the peristaltic pump 5. The flow value of the peristaltic pump 5 is adjustable within 0-1911 ml/min, the accuracy reaches the ml level, and the liquid drop speed can be realized within 0.5-1 ml/s.
The moving platform part is realized in a way that the moving platform consists of a vertical ball screw sliding table 16, a horizontal ball screw sliding table 17 and an objective table 2, and the moving platform is positioned below the spray head 3. The object stage 2 is fixed on a horizontally placed transverse ball screw sliding table 17 and used for fixing an object to be measured, motors of the two ball screw sliding tables adopt 57 stepping motors, 1.8-degree stepping angles are adopted, the length of a machine body is 644mm, the ball screw is connected with the motors through couplings, high transmission precision of the ball screw is guaranteed, the ball screw adopts 1605-450, the diameter of the screw is 16mm, the screw pitch is 5mm, namely, the motors rotate one circle of the ball screw to walk for 5mm, and the effective travel of the ball screw is 450mm. The up-and-down motion of the spray head 3 is realized by controlling the motion of the sliding table of the vertical ball screw sliding table 16, and the spray head and the horizontal ball screw sliding table 17 which is horizontally placed form a moving platform together, so that the convenience of operation of the objective table 2 is ensured. The relative positions of the objective table 2 and the spray head 3 are changed when the transverse ball screw sliding table 17 acts, so that the operation on a sample is more convenient, and the vertical ball screw sliding table 16 acts to change the relative height of the spray head 3 relative to the objective table 2, so that the influence of different falling heights on liquid drops can be studied. The left-right and up-down relative displacement can be realized through the cooperation of the vertical ball screw sliding table 16 and the transverse ball screw sliding table 17, so that the position change of the sample relative to the spray head 3 and the change of the drop height are realized.
As shown in fig. 7, a method for using a parameter-adjustable micro-droplet generator for generating micro-droplets of a certain diameter comprises the steps of:
a1, filling the microsyringe 9, the liquid drop silicone tube 10 and the spray head 3 with liquid medicine, and fixing the microsyringe 9 by using a microsyringe fixing frame 11, wherein when the microsyringes 9, the liquid drop silicone tubes 10 and the spray head 3 in the step (A1) are filled with the liquid medicine, which means that a plurality of groups of microsyringes 9, the liquid drop silicone tubes 10 and the spray head 3 are filled with the liquid medicine, a control switch 14 on the corresponding liquid drop silicone tube 10 is required to be opened according to the number of liquid drops required;
a2, a driving motor of a liquid inlet ball screw sliding table 7 works, the screw rotates and converts the screw into linear motion, the tail end of a microsyringe 9 is pushed by a push plate 8, and liquid with the corresponding volume of liquid drops with the required diameter is released from a spray head 3;
A3, measuring the diameter d of the released liquid drop, and calculating a diameter correction coefficient k d of the released liquid drop according to a formula corresponding to the diameter of the liquid drop, wherein the formula is as follows: Wherein x is the feeding amount of a liquid inlet ball screw sliding table, V L is the measuring range of the microsyringe, L is the corresponding length of the measuring range of the microsyringe, k d is a diameter correction coefficient, and d is the diameter of liquid drops;
And A4, determining the feeding amount x k of the new feeding ball screw sliding table 7 meeting the requirements according to the calculated diameter correction coefficient k d, and regenerating liquid drops with the required diameter according to x k.
As shown in fig. 8, a method for using a parameter-adjustable micro-droplet generator for imparting a given velocity to droplets comprises the steps of:
B1, starting a peristaltic pump 5 after the liquid drops with the determined diameters are released;
B2, injecting the flow rate of the speed required by the liquid drop with the determined diameter into the hollow glass tube 4 through the peristaltic pump 5;
B3, measuring the speed V of the released liquid drop with the determined diameter, and calculating a speed correction coefficient k v of the released liquid drop with the determined diameter according to a formula corresponding to the speed of the liquid drop, wherein the formula is V=15k vπD2 V, V is the flow, D is the inner diameter of the glass tube, V is the speed of the liquid drop, and k v is the speed correction coefficient;
And B4, determining the flow V k of the peristaltic pump 5 which is new to meet the requirements according to the calculated speed correction coefficient k v, and regenerating the required droplet speed according to V k.
As shown in fig. 1 to 6, in the initial stage, the microsyringe 9, the droplet silicone tube 10 and the spray head 3 are filled with the liquid medicine. Through calculating the feeding quantity of the liquid drop with the required diameter corresponding to the microsyringe 9, the pushing plate 8 is driven to push the microsyringe 9 to realize feeding by the movement of the liquid feeding ball screw sliding table 7, the liquid medicine in the microsyringe 9 pushes the liquid drop silicone tube 10 and the liquid medicine in the spray head 3, so that the liquid drop corresponding to the pushing distance of the microsyringe 9 is released from the spray head 3, the minimum pushing precision of the liquid feeding ball screw sliding table 7 is less than 0.02mm, and the generation of single pesticide liquid drops with the diameter of 100-500 microns can be completed. Measuring the diameter d of the released liquid drop, and calculating a diameter correction coefficient k d of the released liquid drop according to a formula corresponding to the diameter of the liquid drop, wherein the formula is as follows: Wherein x is the feeding amount of the feed-in ball screw sliding table, V L is the measuring range of the micro-sampler, L is the corresponding length of the measuring range of the micro-sampler, k d is a diameter correction coefficient, d is the diameter of the liquid drop, the new feeding amount x k of the feed-in ball screw sliding table 7 meeting the requirement is determined according to the calculated diameter correction coefficient k d, and the liquid drop with the required diameter is regenerated according to x k.
As shown in figures 1-6, the peristaltic pump 5 is not started until the generation of the liquid drop with the required diameter is determined, after the liquid drop with the required diameter is generated, the peristaltic pump 5 is started to generate air flow, the air flow passes through the air conveying silicone tube 6 to reach the hollow glass tube 4, stable air flow is generated in the hollow glass tube 4 to drive the liquid drop to move, the speed V of the liquid drop with the determined diameter is measured, the speed correction coefficient k v of the liquid drop with the determined diameter is calculated according to a formula corresponding to the speed of the liquid drop, the formula is V=15 k vπD2 V, V is the flow, D is the inner diameter of the glass tube, V is the speed correction coefficient, k v is the speed correction coefficient, the flow V k of the peristaltic pump 5 which meets the new requirements is determined according to the calculated speed correction coefficient k v, and the required liquid drop speed is regenerated according to V k.
The parameter-adjustable micro-droplet generating device mainly comprises four parts, namely a droplet diameter control part, a multi-droplet generating part, a speed control part and a moving platform part, wherein the device can generate single droplets with a given speed, so that the state of the pesticide droplets falling on plant leaves can be detected, the influence of different diameters and different speeds of the droplets on the wetting characteristics of the droplets on the surfaces of the plant leaves is studied, and a plurality of droplet collision fusion phenomena can be observed, so that a theoretical basis is provided for reducing pesticide use and pesticide residues.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention, and the technology not related to the present invention can be implemented by the prior art.
Claims (5)
1. A parameter-adjustable tiny droplet generation device comprises a mounting frame (1) and is characterized in that a droplet extrusion mechanism, a speed control mechanism and a stage (2) are arranged on the mounting frame (1), a nozzle (3) of the droplet extrusion mechanism is arranged right above the stage (2) and is arranged at the outlet end of a hollow glass tube (4) serving as an airflow channel in the speed control mechanism, the tiny droplet generation device controls the diameter of droplets and the number of single droplets through the droplet extrusion mechanism and controls the dropping speed of the droplets through the speed control mechanism, the speed control mechanism comprises a peristaltic pump (5), a gas transmission silicone tube (6) and a hollow glass tube (4) which are horizontally arranged, one end of the gas transmission silicone tube (6) is connected with an airflow outlet of the peristaltic pump (5), the other end of the gas transmission silicone tube is connected with the top end of the hollow glass tube (4) in a sealing manner, stable airflow generated by the peristaltic pump (5) reaches the hollow glass tube (4) through the gas transmission silicone tube (6), the airflow gives the nozzle (3) the droplet speed, the droplet extrusion mechanism comprises a peristaltic pump (7) arranged at the top of the mounting frame (1), a sliding table (8), a droplet feeding device (10) and a micro-injection screw (10), the pushing plate (8) is arranged on a travelling part of the liquid inlet ball screw sliding table (7), the pushing plate (8) is arranged at the tail end of the microsyringe (9), the liquid inlet ball screw sliding table (7) pushes the microsyringe (9) through the pushing plate (8) to generate tiny liquid drops, the inlet end of the liquid drop silicone tube (10) is communicated with the tiny liquid drop generation end of the microsyringe (9), the outlet end of the liquid drop silicone tube is connected with the inlet end of the spray head (3), and the microsyringe (9), the liquid drop silicone tube (10) and the spray head (3) form a tiny liquid drop supply mechanism; the micro-sampler (9) is arranged on a micro-sampler fixing frame (11) of the liquid inlet ball screw sliding table (7), the front end of each micro-sampler (9) is provided with a liquid drop silicone tube (10) and a spray head (3) which are matched with each other one by one, and the micro-sampler (9), the liquid drop silicone tube (10) and the spray head (3) which are in one-to-one correspondence form a plurality of groups of micro-liquid drop supply mechanisms so as to realize the generation of multiple liquid drops;
the method steps of the device for producing tiny liquid drops with defined diameters are as follows:
a1, filling the microsyringe (9), the liquid drop silicone tube (10) and the spray head (3) with liquid medicine, and fixing the microsyringe (9) by using a microsyringe fixing frame (11);
A2, a driving motor of a liquid inlet ball screw sliding table (7) works, the screw rotates and converts the screw into linear motion, the tail end of a microsyringe (9) is pushed by a pushing plate (8), and liquid with the corresponding volume of liquid drops with the required diameter is released from a spray head (3);
A3, measuring the diameter d of the released liquid drop, and calculating a diameter correction coefficient k d of the released liquid drop according to a formula corresponding to the diameter of the liquid drop, wherein the formula is as follows: Wherein x is the feeding amount of a liquid inlet ball screw sliding table, V L is the measuring range of the microsyringe, L is the corresponding length of the measuring range of the microsyringe, k d is a diameter correction coefficient, and d is the diameter of liquid drops;
A4, determining the feeding amount x k of a new feeding ball screw sliding table (7) meeting the requirements according to the calculated diameter correction coefficient k d, and regenerating liquid drops with required diameters according to x k;
the method steps of the device for imparting a given velocity to a droplet are as follows:
B1, starting a peristaltic pump (5) after the liquid drops with the determined diameters are released;
b2, injecting the flow rate of the speed required by the liquid drop with the determined diameter into the hollow glass tube (4) through the peristaltic pump (5);
B3, measuring the speed V of the released liquid drop with the determined diameter, and calculating a speed correction coefficient k v of the released liquid drop with the determined diameter according to a formula corresponding to the speed of the liquid drop, wherein the formula is V=15k vπD2 V, V is the flow, D is the inner diameter of the glass tube, V is the speed of the liquid drop, and k v is the speed correction coefficient;
And B4, determining the flow V k of the peristaltic pump (5) which is new to meet the requirements according to the calculated speed correction coefficient k v, and regenerating the required droplet speed according to V k.
2. The device for generating micro-droplets with adjustable parameters according to claim 1, wherein the micro-droplet supply mechanism is provided with a diverter (12), the diverter (12) comprises a three-way joint (13), the inlet ends of the three-way joint (13) are respectively communicated with the micro-droplet generation ends of the corresponding micro-sampler (9), one outlet end of the three-way joint (13) is communicated with one end of a droplet silicone tube (10) with a control switch (14), the other outlet end of the three-way joint is communicated with one end of a shunt tube (15) with the control switch (14), and the arrangement of the diverter (12) can enable the feeding of a feed liquid ball screw sliding table (7) to supply single micro-droplets or a plurality of micro-droplets.
3. The parameter-adjustable micro-droplet generation device of claim 1 is characterized in that a vertical ball screw sliding table (16) and a horizontal ball screw sliding table (17) which are vertically arranged are further arranged on the installation frame (1), a fixing frame (18) is installed on a traveling part of the vertical ball screw sliding table (16), a hollow glass tube (4) is fixedly installed on the fixing frame (18) through a clamping frame (19), a nozzle (3) is installed on a rotating shaft (20) and the rotating shaft (20) is installed on the fixing frame (18) through a set screw (21), so that the nozzle (3) can adjust the direction through rotation of the rotating shaft (20), the object stage (2) is installed on a traveling part of the horizontal ball screw sliding table (17), and through relative displacement of the vertical ball screw sliding table (16) and relative displacement of the horizontal ball screw sliding table (17), the position change of a sample on the object stage (2) relative to the nozzle (3) and the change of the falling height of a droplet can be realized.
4. The parameter-adjustable micro-droplet generator according to claim 1, wherein the spray heads (3) are arranged obliquely downward with respect to the horizontal plane, and when a plurality of spray heads (3) are arranged, the spray heads (3) are uniformly arranged along the circumferential direction of the hollow glass tube (4).
5. The device for generating micro-droplets with adjustable parameters according to claim 1, wherein the micro-injector (9), the droplet silicone tube (10) and the nozzle (3) in the step A1 are filled with the liquid medicine, which means that when the plurality of groups of micro-injectors (9), the droplet silicone tube (10) and the nozzle (3) are filled with the liquid medicine, the control switch (14) on the corresponding droplet silicone tube (10) is required to be opened according to the number of the required droplets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109075.6A CN109682725B (en) | 2019-02-03 | 2019-02-03 | Parameter-adjustable micro-droplet generation device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109075.6A CN109682725B (en) | 2019-02-03 | 2019-02-03 | Parameter-adjustable micro-droplet generation device and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109682725A CN109682725A (en) | 2019-04-26 |
| CN109682725B true CN109682725B (en) | 2024-12-17 |
Family
ID=66195619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910109075.6A Active CN109682725B (en) | 2019-02-03 | 2019-02-03 | Parameter-adjustable micro-droplet generation device and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109682725B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201812A (en) * | 2019-07-12 | 2019-09-06 | 中国计量大学 | A kind of droplet collision generating device |
| CN110646327A (en) * | 2019-10-17 | 2020-01-03 | 上海睿度光电科技有限公司 | A dual-channel droplet impact observation device |
| CN112858109A (en) * | 2021-03-17 | 2021-05-28 | 哈尔滨工程大学 | Two-liquid-drop static and dynamic fusion observation system and method |
| CN113610197B (en) * | 2021-07-15 | 2024-09-13 | 北京云星宇交通科技股份有限公司 | Card reader-writer with disinfection function |
| CN114225987B (en) * | 2021-11-15 | 2023-03-07 | 北京理工大学 | Double-droplet generation device capable of being controlled respectively |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490470A (en) * | 2011-12-07 | 2012-06-13 | 北京清科奥博仪器设备有限公司 | Method and device for controlling tiny droplet spraying by airflows |
| CN108827832A (en) * | 2018-05-04 | 2018-11-16 | 杭州电子科技大学 | Metal-contacting surface energy detection method and device based on drop seepage characteristic |
| CN209589760U (en) * | 2019-02-03 | 2019-11-05 | 南京林业大学 | Parameter adjustable type fine droplet generating device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202195997U (en) * | 2011-08-24 | 2012-04-18 | 上海梭伦信息科技有限公司 | Interface rheological testing device by droplet image method |
| CN102864472B (en) * | 2012-10-12 | 2015-03-25 | 河南理工大学 | Micro-jet electroforming nozzle |
| KR101583303B1 (en) * | 2014-11-20 | 2016-01-11 | 포항공과대학교 산학협력단 | Micro droplet measuring apparatus and micro droplet measuring method for surface energy measuring |
| CN105891206B (en) * | 2016-04-05 | 2018-07-24 | 北京航空航天大学 | A kind of controllable supercooling drop continuously hits microcosmic observation system |
| CN106228875B (en) * | 2016-09-29 | 2019-01-22 | 河海大学常州校区 | A droplet impacting liquid film visualization experimental platform and using method thereof |
| CN108344612A (en) * | 2018-04-20 | 2018-07-31 | 大连理工大学 | It is a kind of can accuracy controlling drop generating system |
| CN109100149B (en) * | 2018-06-26 | 2020-01-10 | 北京理工大学 | Liquid drop wall-collision experimental device capable of correcting drop drift |
| CN108827640B (en) * | 2018-06-26 | 2020-01-10 | 北京理工大学 | High-speed wall collision experimental device for liquid drops driven by gas |
-
2019
- 2019-02-03 CN CN201910109075.6A patent/CN109682725B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490470A (en) * | 2011-12-07 | 2012-06-13 | 北京清科奥博仪器设备有限公司 | Method and device for controlling tiny droplet spraying by airflows |
| CN108827832A (en) * | 2018-05-04 | 2018-11-16 | 杭州电子科技大学 | Metal-contacting surface energy detection method and device based on drop seepage characteristic |
| CN209589760U (en) * | 2019-02-03 | 2019-11-05 | 南京林业大学 | Parameter adjustable type fine droplet generating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109682725A (en) | 2019-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109682725B (en) | Parameter-adjustable micro-droplet generation device and application method thereof | |
| CN103898618B (en) | For electrospinning jet quick and stable control device and the control method thereof of micro-nano technology | |
| CN209589760U (en) | Parameter adjustable type fine droplet generating device | |
| CA2463218A1 (en) | Sprayed in place pipe lining apparatus and method thereof | |
| CN107505236A (en) | A kind of contact angle measuring method and its device with new liquid distribution method | |
| CN106003733B (en) | 3D printing device and method based on electromagnetic emission technique | |
| CN206653653U (en) | Compound material ultrasound deposits increasing material manufacturing device | |
| CN104032383B (en) | Bidirectional spiral electrostatic spinning device | |
| CN106801226A (en) | Hinge slider type laser coaxial powder feeding nozzle with adjustable powder focus | |
| CN107063621A (en) | Wind field measurement platform and the Wind field measurement method using the platform below unmanned plane rotor | |
| CN206616273U (en) | A kind of adjustable hinge slider formula laser coaxial powder feeding nozzle of powder focus | |
| CN106142571B (en) | The ultrasonic droplet ejection increasing material manufacturing device and method of many materials of variable speed | |
| CN201304757Y (en) | Oscillating device for online ink jet numbering machine on double tube extruding production line | |
| CN207457009U (en) | A kind of apparatus for measuring contact angle | |
| CN115179653B (en) | Multi-material electrohydrodynamic printing apparatus and method with adjustable pattern width and spacing | |
| CN107116907B (en) | 2D/3D printing device and printing method for nanomaterial microstructure | |
| CN210434719U (en) | Liquid drop collision generating device | |
| CN110201812A (en) | A kind of droplet collision generating device | |
| CN114103100A (en) | A kind of electro-atomization-electric jet composite printing method | |
| CN110470495A (en) | Atmospheric spray test bench | |
| CN205969971U (en) | Many materials of infinitely variable supersound droplet sprays vibration material disk device | |
| GB780727A (en) | Improvements in the production of sprayed coatings | |
| WO2020042423A1 (en) | Wet concrete spraying single-particle aggregate rebound and adhesion mechanism testing platform | |
| CN206703725U (en) | A kind of three coordinate treadmill type Digital ink-jet printers | |
| CN110893679A (en) | A micro-3D printing device for active stem cells based on PL-level piezoelectric nozzle technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |