阅读说明：本技术 一种基于压电振动式的静电打点装置 (Electrostatic dotting device based on piezoelectric vibration ) 是由 韦东东 江海 顾守东 焦晓阳 周京京 于 2018-06-05 设计创作，主要内容包括：本发明涉及静电打点领域,具体涉及一种基于压电振动式的静电打点装置。一种基于压电振动式的静电打点装置,包括储液装置和供液装置,所述储液装置包括储液壳体,所述储液壳体上相对设置有开口和出液口,所述开口上设置有压电振动元件,所述开口的面积大于出液口的面积,所述开口和出液口位于同一中心线上,所述供液装置为储液装置密封供液。解决了现有的静电纺丝技术中存在的无法制备二维和零维纳米材料；静电纺丝过程中易出现鞭动现象,不稳定,不易控制；打印材料受限等问题。(The invention relates to the field of electrostatic dotting, in particular to an electrostatic dotting device based on a piezoelectric vibration mode. The utility model provides a device is got ready to static based on piezoelectricity vibrating, includes stock solution device and supplies the liquid device, the stock solution device includes the stock solution casing, be provided with opening and liquid outlet on the stock solution casing relatively, be provided with piezoelectric vibrating element on the opening, the open-ended area is greater than the area of liquid outlet, opening and liquid outlet are located same central line, supply the liquid device for the sealed confession liquid of stock solution device. Solves the problem that the two-dimensional and zero-dimensional nano materials can not be prepared in the prior electrostatic spinning technology; whiplash is easy to occur in the electrostatic spinning process, and the whiplash is unstable and difficult to control; the printing material is limited, etc.)

1. The utility model provides a device is got ready to static based on piezoelectricity vibrating, includes stock solution device (1) and supplies liquid device (2), its characterized in that, stock solution device (1) is including stock solution casing (11), be provided with opening (12) and liquid outlet (13) on stock solution casing (11) relatively, be provided with piezoelectric vibrating element (3) on opening (12), the area of opening (12) is greater than the area of liquid outlet (13), opening (12) and liquid outlet (13) are located same central line, supply liquid device (2) for stock solution device (1) sealed confession liquid.

2. a piezoelectric vibration based electrostatic dotting device according to claim 1, wherein said piezoelectric vibrating element (3) comprises a piezoelectric ceramic (31) and a substrate (32), said substrate (32) being sealingly arranged on the opening (12), said substrate (32) being vibrated by the piezoelectric ceramic (31).

3. a piezoelectric vibration based electrostatic dotting device according to claim 2, wherein said liquid storage device (1) is provided with a through hole (15), and said liquid supply device (2) supplies liquid to said liquid storage device (1) through said through hole (15).

4. A piezoelectric vibration based electrostatic dotting device according to claim 3, wherein said liquid supply means (2) comprises a liquid supply housing (21), a sealing piston (23) disposed within the liquid supply housing (21), and a thin conduit (22) communicating with the interior of the liquid supply housing (21), said thin conduit (22) extending into the through-hole, said sealing piston (23) being connected to the power means (26) by a push rod (24).

5. A piezoelectric vibration based electrostatic dotting device according to claim 4, wherein a backplate (25) is provided at the rear end of the liquid supply housing (2), the push rod (24) passes through the backplate (25), an external thread is provided on the push rod (24), an internal thread matching the external thread of the push rod (24) is provided on the backplate (25), and the power device (26) drives the push rod (24) to rotate.

6. A piezoelectric vibration based electrostatic dotting device according to any one of claims 1 to 5, further comprising a receiving board (4) and a high voltage power supply (5), wherein said receiving board (4) is connected to one pole of the high voltage power supply (5), and the other pole of said high voltage power supply (5) is connected to the liquid outlet (13).

7. A piezoelectric vibration based electrostatic dotting device according to claim 6, wherein a conducting ring (14) is arranged on the liquid outlet (13) of the liquid storage device (1), the conducting ring (14) is connected with the positive pole of the high voltage power supply (5), and the receiving plate (4) is connected with the negative pole of the high voltage power supply (5).

8. A piezoelectric vibration based electrostatic dotting device according to claim 7, wherein said receiving plate (4) is capable of three-dimensional movement.

9. a piezoelectric vibration based electrostatic spotting device as claimed in claim 7 wherein a high voltage electric or magnetic field is provided between the reservoir (1) and the receiver plate (4).

Technical Field

the invention relates to the field of electrostatic dotting, in particular to an electrostatic dotting device based on a piezoelectric vibration mode.

Background

With the development of nanotechnology, electrostatic spinning is a simple, convenient and effective novel processing technology capable of producing nanofibers, and plays a great role in the fields of biomedical materials, filtration and protection, catalysis, energy, photoelectricity, food engineering, cosmetics and the like. Electrospinning is a process in which a thin stream (solution or melt) flows from the tip of a taylor cone under an electrostatic field and then cools to solidify into a polymer fiber.

Chinese application No. CN201410099806.0 discloses an electrostatic spinning device, and specifically discloses: the injector pushing mechanism extrudes the solution in the injector from the electrostatic spinning nozzle under the action of force, the high-voltage direct-current power supply is connected with the electrostatic spinning nozzle through a lead, the conductive collector is connected with a ground electric field through a lead, a high-voltage electric field is formed between the collector and the electrostatic spinning nozzle under the action of the high-voltage direct-current power supply to provide an electric field for electrostatic spinning, and the high-voltage direct-current power supply is connected with a control system through a lead to control the voltage output of the high-voltage direct-current power supply. However, electrospinning faces some of the following problems: (1) electrostatic spinning can only prepare one-dimensional nano materials, and has great problems for the preparation of two-dimensional and zero-dimensional nano materials; (2) the phenomenon of whip can occur in the process of transferring the nano-fibers formed based on electrostatic spinning to a receiving plate, so that the stability is greatly reduced; (3) the controllability and the sensitivity of the electrostatic spinning technology are lower; (4) the printing material is limited by the forming mechanism, the liquid for electrostatic spinning is generally non-conductive liquid, and the electric field short circuit phenomenon can occur when the conductive liquid is adopted for spinning, so that the application range of electrostatic spinning is limited to a certain extent due to the problem.

Disclosure of Invention

Aiming at solving the problem that the two-dimensional and zero-dimensional nano materials can not be prepared in the prior electrostatic spinning technology; whiplash is easy to occur in the electrostatic spinning process, and the whiplash is unstable and difficult to control; the invention provides an electrostatic dotting device based on a piezoelectric vibration mode, and solves the technical problems. The technical scheme of the invention is as follows:

The utility model provides a device is got ready to static based on piezoelectricity vibrating, includes stock solution device and supplies the liquid device, the stock solution device includes the stock solution casing, be provided with opening and liquid outlet on the stock solution casing relatively, be provided with piezoelectric vibrating element on the opening, the open-ended area is greater than the area of liquid outlet, opening and liquid outlet are located same central line, supply the liquid device for the sealed confession liquid of stock solution device.

Further, the piezoelectric vibration element includes piezoelectric ceramics and a substrate, the substrate is hermetically disposed on the opening, and the substrate vibrates under the action of the piezoelectric ceramics.

Further, a through hole is formed in the liquid storage device, and the liquid supply device supplies liquid to the liquid storage device through the through hole.

Further, the liquid supply device comprises a liquid supply shell, a sealing piston arranged in the liquid supply shell and a thin guide pipe communicated with an inner cavity of the liquid supply shell, the thin guide pipe extends into the through hole, and the sealing piston is connected with the power device through a push rod.

furthermore, a rear baffle is arranged at the rear end of the liquid supply shell, the push rod penetrates through the rear baffle, external threads are arranged on the push rod, internal threads matched with the external threads of the push rod are arranged on the rear baffle, and the power device drives the push rod to rotate.

furthermore, the device also comprises a receiving plate and a high-voltage power supply, wherein the receiving plate is connected with one pole of the high-voltage power supply, and the other pole of the high-voltage power supply is connected with the liquid outlet.

Further, a conducting ring is arranged on a liquid outlet of the liquid storage device, the conducting ring is connected with a positive electrode of the high-voltage power supply, and the receiving plate is connected with a negative electrode of the high-voltage power supply.

Further, the receiving plate is capable of three-dimensional movement.

further, a high-voltage electric field or a high-voltage magnetic field is arranged between the liquid storage device and the receiving plate.

based on the technical scheme, the invention can realize the following technical effects:

1. the electrostatic dotting device based on the piezoelectric vibration type combines the piezoelectric vibration device with the high-voltage electric field, can realize accurate dotting under the high-voltage electric field, and realizes the preparation of two-dimensional and zero-dimensional nano materials;

2. The electrostatic dotting device based on the piezoelectric vibration type can realize dotting operation on various materials, such as non-metal insulating materials, non-metal conductive materials, metal conductive materials and the like; the printing of various micro-nano-level structures can be realized, such as high-efficiency filter paper, medical biological materials, protective clothing, motor materials, gas sensors and the like;

3. The electrostatic dotting device based on the piezoelectric vibration type is wide in application, has unique advantages in the fields of surface coatings such as circuit board surface homomode printing, micro-electromechanical equipment and the like, and has good application prospects in the nano-material self-assembly technology;

4. The piezoelectric vibration type electrostatic dotting device disclosed by the invention controls the liquid amount by adopting piezoelectric vibration, is accurate in control, and can realize single-point printing or multi-point printing at the liquid outlet end by adjusting the vibration frequency of the piezoelectric vibration element to enable the liquid to be dotted in the liquid storage device to vibrate under different vibration modes.

Drawings

FIG. 1 is a schematic structural diagram of an electrostatic dotting device according to the present invention;

FIG. 2 is a schematic structural diagram of a liquid storage device with a conductive ring in an electrostatic spotting device according to the present invention;

FIG. 3 is a schematic structural diagram of a liquid supply device in the electrostatic dotting device according to the present invention;

Fig. 4 is a state diagram when the piezoelectric vibrating element vibrates upward in the electrostatic spotting device of the present invention;

FIG. 5 is a view showing a state where a piezoelectric vibration element vibrates downward in the electrostatic dot device according to the present invention;

FIG. 6 is a view showing a state of dotting when a piezoelectric vibrating element vibrates downward in the electrostatic dotting device according to the present invention;

FIG. 7 is a schematic diagram of an external electric field of the electrostatic dotting device according to the present invention;

FIG. 8 is a schematic diagram illustrating the movement trace of the charged liquid ejected from the electrostatic dotting device in the external electric field according to the present invention;

FIG. 9 is a schematic diagram of the moving trajectory of the charged liquid ejected from the electrostatic dotting device in the external magnetic field according to the present invention;

FIG. 10 is a diagram illustrating the multi-point output state of the electrostatic dotting device according to the present invention;

In the figure: 1-a liquid storage device; 11-a liquid storage shell; 12-an opening; 13-a liquid outlet; 14-a conductive ring; 15-a through hole; 2-a liquid supply device; 21-a liquid supply housing; 22-a thin catheter; 23-a sealing piston; 24-a push rod; 25-a tailgate; 26-a power plant; 3-a piezoelectric vibration element; 31-piezoelectric ceramics; 32-a substrate; 4-receiving a plate; 5-high voltage power supply.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-10, the present embodiment provides an electrostatic dotting device based on piezoelectric vibration, including a liquid storage device 1 and a liquid supply device 2, the liquid storage device 1 is used for storing a liquid to be dotted, the liquid storage device 1 includes a liquid storage housing 11, the liquid storage housing 11 is a hollow cavity structure, the specific shape is not limited, and may be a hollow cylinder, a hollow cuboid, a hollow sphere, etc., the liquid to be dotted is filled in the liquid storage housing 11, and preferably, the material of the liquid storage housing 11 is an insulating material. The liquid storage shell 11 is provided with an opening 12 and a liquid outlet 13, the opening 12 is provided with a piezoelectric vibrating element 3, the liquid outlet 13 is used for ejecting liquid to be doted from the liquid outlet 13 under the action of the piezoelectric vibrating element 3, the area of the opening 12 is larger than that of the liquid outlet 13, the liquid outlet 13 is located below the opening 12, preferably, the liquid outlet 13 is located right below the opening 12, and the opening 12 and the liquid outlet 13 are located on the same central line. The liquid storage shell 11 is further provided with a through hole 15, the through hole 15 is communicated with a liquid storage cavity in the liquid storage shell 11, and the through hole 15 is used for communicating the liquid storage cavity of the liquid storage shell 11 with the liquid supply device 2. Preferably, the through-hole 15 is provided in a side wall of the reservoir housing 11. In order to conveniently charge the liquid to be dotted at the liquid outlet 13, a conducting ring 14 is arranged at the liquid outlet 13, and the conducting ring 14 is arranged at the liquid outlet 13 and is in contact with the liquid to be dotted in the liquid storage shell 11.

The piezoelectric vibration element 3 is arranged at the opening 12 of the liquid storage shell 11, and the piezoelectric vibration element 3 is driven by the driving circuit to vibrate. The piezoelectric vibration element 3 includes a piezoelectric ceramic 31 and a substrate 32, the substrate 32 is disposed at the opening 12 in a sealing manner, the substrate 32 has certain elasticity and can vibrate up and down, and the substrate 32 can be a metal substrate coated with an insulating material. The piezoelectric ceramics 31 are arranged on the outer surface of the substrate 32, the piezoelectric ceramics 31 vibrate under the driving of the driving circuit, and the piezoelectric ceramics 31 drives the substrate 32 to vibrate up and down. The shape of the piezoelectric ceramic 31 is not limited, and may be rectangular, circular, bowl-shaped, or the like.

the liquid supply device 2 supplies liquid to the liquid storage device 1, and liquid to be dotted in the liquid storage device 1 is guaranteed to be filled in the liquid storage shell 11 all the time. The liquid supply device 2 comprises a liquid supply shell 21, a thin guide pipe 22 and a sealing piston 23, the thin guide pipe 22 is arranged at the front end of the liquid supply shell and is communicated with an inner cavity of the liquid supply shell 21, the thin guide pipe 22 can extend into a through hole 15 on the liquid storage device 1, and the liquid supply device 2 supplies liquid to the liquid storage device 1 through the thin guide pipe 22. The seal piston 23 is sealingly disposed within the liquid supply housing 21 and is movable in an axial direction of the liquid supply housing 21. The liquid in the liquid supply device 2 is transferred to the liquid storage device 1 by pushing the sealing piston 23 to move towards the thin guide tube 22. Preferably, a push rod 24 is arranged on one side of the sealing piston 23 far away from the thin catheter 22, a driving device 26 is connected to the push rod 24, the driving device 26 pushes the push rod 24, and the push rod 24 pushes the sealing piston 23 to move forwards to deliver liquid into the infusion set 1. Preferably, the driving device 26 may be a hydraulic cylinder, an air cylinder, a screw pump, or the like. In this embodiment, the push rod 24 is preferably provided with an external thread, the rear end of the liquid supply housing 21 away from the thin guide tube 22 is provided with a rear baffle 25, the rear baffle 25 is provided with a through hole, an internal thread is provided in the through hole, the push rod 24 is in threaded connection with the rear baffle 25, the push rod 24 extends out of the rear baffle 25, one end of the push rod 24 extending out of the rear baffle 25 is connected with a driving device 26, here, the driving device 26 is preferably a stepping motor, the stepping motor drives the push rod 24 to rotate, and the push rod 24 rotates and pushes the sealing piston 23 forward, so as to convey the liquid in the liquid supply device 1 into the infusion device 1.

The electrostatic dotting device of this embodiment further comprises a receiving plate 4 and a high voltage power supply 5, one pole of the high voltage power supply 5 is connected with the liquid outlet 13, and the other pole of the high voltage power supply 5 is connected with the receiving plate 4. Preferably, in the case that the liquid outlet 13 is provided with a conductive ring 14, the positive pole of the high voltage power source 5 is connected to the conductive ring 14, and the negative pole of the high voltage power source 5 is connected to the receiving plate 4. The receiving plate 4 is used for receiving the ejected dot-shaped liquid, and the receiving plate 4 is of a flat plate structure and is not limited in shape and made of metal. Preferably, in order to realize the printing of the micro-nano three-dimensional structure, the receiving plate 4 may be a device capable of realizing spatial three-dimensional motion, that is, the receiving plate 4 may move in the directions of the X axis, the Y axis and the Z axis under the action of the driving member. Under the condition of ensuring that the dotting position is not changed, the printing of the micro-nano three-dimensional structure is realized by controlling the spatial movement of the receiving plate 4.

In order to control the running direction of the ejected charged liquid droplets, an external electric field or magnetic field is further provided between the liquid storage device 1 and the receiving plate 4 of the electrostatic dotting device of the embodiment. When an external electric field is arranged between the liquid storage device 1 and the receiving plate 4, the motion track of the charged liquid drops can be controlled by adjusting the direction of the external electric field in real time, and the printing of the micro-nano three-dimensional structure is realized. When an external magnetic field is arranged between the liquid storage device 1 and the receiving plate 4, the motion track of the charged liquid drops can also deflect under the action of the external magnetic field, so that the motion track of the charged liquid can be controlled as long as the direction of the external magnetic field is controlled, and the printing of a micro-nano three-dimensional structure is realized.

Besides single-point printing, the electrostatic dotting device of the embodiment can also enable liquid to be dotted in the liquid storage device 1 to vibrate under different vibration modes by adjusting different vibration frequencies of the piezoelectric vibration elements, so that the vibration modes of simultaneous printing of multiple points at the liquid outlet end can be realized.

the electrostatic dotting device of the embodiment further comprises a control device, wherein the control device is used for obtaining the working condition of the piezoelectric vibration element 3 and controlling the liquid supply device to supply liquid to the liquid storage device according to the working condition of the piezoelectric vibration element 3. Specifically, when the piezoelectric vibrating element 3 moves upwards and the volume of the inner cavity of the liquid storage shell 11 becomes larger, the control device drives the driving device 26 to work, the sealing piston 23 is pushed to move forwards through the push rod 24, and the liquid in the liquid supply shell 21 enters the liquid storage shell 11 through the thin guide pipe 22 to be supplied.

Based on the technical scheme, the working principle of the electrostatic dotting device is as follows: firstly, liquid to be dotted is injected into the liquid storage device 1, meanwhile, a proper amount of liquid to be dotted is injected into the liquid supply device 2, when dotting is needed, the piezoelectric ceramic 31 vibrates under the driving action of the driving circuit and drives the substrate 32 to vibrate to drive the liquid to be dotted in the liquid storage device 1 to vibrate, the vibration frequency and the driving voltage of the piezoelectric ceramic 31 are adjusted to enable the liquid to be dotted in the liquid storage device 1 to vibrate in a certain state, and the repeated vibration of the piezoelectric ceramic 31 drives the liquid to be dotted in the liquid storage device 1 to repeatedly vibrate. The liquid to be dotted at the liquid outlet 13 of the liquid storage device 1 is charged, the top end of the liquid at the position with the maximum amplitude of the liquid surface at the top end of the charged liquid forms a Taylor cone with an included angle alpha due to the action of electric field force, when the alpha is smaller than a critical angle, the electric field force borne by the liquid is larger than the surface tension force, the liquid is pulled out from the liquid outlet 13 to form liquid drops, when the amplitude of the liquid surface at the top end of the liquid with the point in the liquid outlet 13 is gradually reduced, the top end included angle alpha of the Taylor cone formed on the surface of the charged liquid is larger than. The piezoelectric vibration element 3 drives the liquid to be dotted in the liquid storage device 1 to repeatedly vibrate to form continuous dotting action, the liquid supply device continuously supplies liquid to the liquid storage device 1 in a micro amount under the driving of the driving device, and the liquid to be dotted in the inner cavity of the liquid storage device 1 is ensured to be filled with the inner cavity all the time to form stable and continuous dotting. In addition, the electrostatic dotting device of the embodiment is not limited in placement posture during dotting, and can dotting downwards, or dotting upwards or dotting under other placement postures according to the situation.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.