A micro-pattern spraying device for the inner wall of a circular tube

Abstract

The application provides a kind of micro-pattern spraying device for the inner wall of a circular tube, relating to the technical field of electrospinning.The micro-pattern spraying device for the inner wall of a circular tube comprises a support plate, an insulating backing plate is fixedly connected to the top of the support plate near the center, a circular tube fixing member is fixedly connected to the top of the insulating backing plate, a small-diameter circular tube is installed at the top of the circular tube fixing member near the center, an installation tube is installed at the top of the small-diameter circular tube, a needle is installed inside the installation tube, an adjusting mechanism is arranged on the outer wall of the needle, by designing the adjusting mechanism, a partition plate is installed between the partition sleeve and the rotating gear shaft, the position of the rotating gear shaft is adjusted according to the spraying requirements, the size of the two side cavities is controlled by adjusting the position of the partition plate, and the size of the airflow cavity is adjusted, so that the spraying forming on the circumference and different height positions of the inner wall of the circular tube is realized, and precise spraying forming is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrospinning, in particular to a micro-pattern spraying device for the inner wall of a circular pipe. BACKGROUND

[0002] The micro-pattern spraying device for the inner wall of a circular pipe is an innovative printing technology that realizes identification, pattern or coating processing on the inner wall of a pipe by spraying on the inner wall of the pipe. With the continuous progress of industrial technology, the demand for pipe identification and surface processing is increasing. Traditional pipe identification methods such as stickers and paint spraying have problems such as unstable identification, easy peeling and poor environmental adaptability. In order to solve these problems, the micro-pattern spraying device for the inner wall of a circular pipe has emerged.

[0003] There is no such micro-pattern spraying device for the inner wall of a circular pipe on the market. In existing electrospinning spraying devices, the nozzle and the collection substrate are mainly arranged vertically. The jet flows from the nozzle needle jet and directly deposits on the collection substrate in the normal direction. However, for small-diameter circular pipes, the nozzle is difficult to be arranged in the normal direction of the collection substrate, and the spraying working distance needs to be considered. Therefore, it cannot meet the micro-pattern spraying requirements of the inner wall of a small-diameter circular pipe. In addition, the airflow introduced in the existing electrospinning device mainly plays a role in restraining the jet flow and overcoming interference. The airflow and the jet flow are coaxially arranged to be uniformly distributed around the jet flow in the form of a ring. However, it cannot meet the requirement of spraying control at a specified position on the inner wall of a small-diameter circular pipe when the nozzle is arranged in the axial direction of the circular pipe.

[0004] Therefore, we have developed a new micro-pattern spraying device for the inner wall of a circular pipe. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the shortcomings of the prior art, the present application provides a micro-pattern spraying device for the inner wall of a circular pipe, which solves the problem that there is no such micro-pattern spraying device for the inner wall of a circular pipe on the market. In existing electrospinning spraying devices, the nozzle and the collection substrate are mainly arranged vertically. The jet flows from the nozzle needle jet and directly deposits on the collection substrate in the normal direction. However, for small-diameter circular pipes, the nozzle is difficult to be arranged in the normal direction of the collection substrate, and the spraying working distance needs to be considered. Therefore, it cannot meet the micro-pattern spraying requirements of the inner wall of a small-diameter circular pipe. In addition, the airflow introduced in the existing electrospinning device mainly plays a role in restraining the jet flow and overcoming interference. The airflow and the jet flow are coaxially arranged to be uniformly distributed around the jet flow in the form of a ring. However, it cannot meet the requirement of spraying control at a specified position on the inner wall of a small-diameter circular pipe when the nozzle is arranged in the axial direction of the circular pipe.

[0007] (II) Technical solutions

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: a micro-pattern inkjet printing device for the inner wall of a circular tube, comprising a support plate, an insulating pad fixedly connected to the top of the support plate near the center position, a circular tube fixing member fixedly connected to the top of the insulating pad, a plurality of first double-headed stud fastener groups installed on the outer wall of the circular tube fixing member, and a small-diameter circular tube installed on the top of the circular tube fixing member near the center position;

[0009] The top of the small-diameter circular tube is equipped with an installation tube. The outer wall of the installation tube is connected to a first air compressor and a second air compressor via air pipes. The first air compressor and the second air compressor are each equipped with a corresponding first air pump flow controller and second air pump flow controller. The top of the installation tube is equipped with an electrospinning liquid connector and a second double-ended stud fastener assembly. A high-voltage power supply is installed on one side of the top of the electrospinning liquid connector. A needle is installed inside the installation tube, and an adjustment mechanism is provided on the outer wall of the needle.

[0010] A transmission mechanism is provided on the other side of the mounting tube.

[0011] Preferably, the first air compressor and the second air compressor are installed on the outer wall of the mounting pipe in a symmetrical structure.

[0012] The above technical solution helps to distribute weight and pressure evenly on the structure of the installation pipe, reducing the possibility of imbalance and deformation. This contributes to the overall stability and durability of the equipment. Through symmetrical installation, the working efficiency of the first and second air compressors can be improved because the two compressors can operate in a balanced manner, reducing the generation of excessive pressure and improving overall performance.

[0013] Preferably, the needle is installed inside the mounting tube.

[0014] The above technical solution allows electrospinning liquid to be sprayed onto the inner wall of a round tube using a needle, enabling the spraying of various shapes of inkjet printing onto the round tube according to actual needs.

[0015] Preferably, the top of the needle is fixedly connected to the bottom of the electrospinning fluid connector.

[0016] Through the above technical solution, the fixed connection can ensure a more secure connection between the needle and the electrospinning fluid connector, reducing the risk of leakage. Especially under high pressure or high flow conditions, a stable connection means higher transmission efficiency between the needle and the electrospinning fluid connector, allowing for more effective injection or extraction of the electrospinning fluid and improving work efficiency.

[0017] Preferably, the needle has a spray assembly installed inside.

[0018] By installing the jetting component inside the needle using the above technical solution, more precise jetting and positioning can be achieved. Since the jetting source is located directly at or near the tip of the needle, the jetting material can be released directly from the desired location, improving the accuracy of printing.

[0019] Preferably, the adjustment mechanism includes a partition sleeve installed on the outer wall of the needle, the partition sleeve having a first mounting groove inside, a first partition plate installed inside the first mounting groove, a rotating gear shaft rotatably connected inside the mounting tube, a first airflow inlet and a second airflow inlet being respectively opened inside the rotating gear shaft, a second mounting groove being opened inside the rotating gear shaft, and a second partition plate being installed inside the second mounting groove.

[0020] Through the above technical solution, the partition sleeve and the rotating gear shaft form an airflow cavity. During operation, the partition sleeve and the first partition plate installed on it are fixed, while the rotating gear shaft and the second partition plate installed on it rotate back and forth under the meshing of the gears, thereby changing the angle between the partition plates and thus adjusting the size of the left and right cavities. By adjusting the size of the airflow cavity, printing can be achieved at any position on the inner wall of the circular tube. The left and right cavities each have an airflow inlet. The airflow size of the left and right cavities is adjusted by the first air pump flow controller and the second air pump flow controller, thereby achieving the airflow intensity ratio between the left and right cavities and thus achieving printing at different heights on the inner wall of the circular tube.

[0021] Preferably, the other end of the first partition plate is attached to and slides against the inner wall of the rotating gear shaft.

[0022] With the above technical solution, the other end of the second partition plate slides against the outer wall of the partition sleeve, and the tight fit ensures that the airflow entering it will not leak out through the gap between the two, thus ensuring that the device can work normally.

[0023] Preferably, the transmission mechanism includes a fixed block installed on the other side of the mounting tube, a servo motor installed on the top of the fixed block, a connecting key fixedly connected to the output end of the servo motor, a transmission gear installed on the outer wall of the connecting key, and a motor speed controller installed on one side of the top of the servo motor.

[0024] The above technical solution controls the speed and direction of the servo motor through a motor speed controller. The output shaft of the servo motor is connected to the transmission gear through a connecting key. The transmission gear drives the rotating gear shaft to rotate back and forth, thereby changing the volume of the left and right cavities.

[0025] Preferably, the fixing block has mounting holes inside that correspond to the servo motor and the transmission gear.

[0026] By using the above technical solution, and through the mounting holes corresponding to the servo motor and transmission gear, it can be ensured that their positions and orientations inside the fixing block are completely consistent with the design requirements. This enables precise installation and ensures the normal operation of the transmission system.

[0027] Preferably, the transmission gear is installed between the servo motor and the rotating gear shaft.

[0028] Through the above technical solutions, the servo motor can provide precise speed and torque control. Combined with the rotating gear shaft, more precise motion control can be achieved. The servo motor can drive the rotating gear shaft to rotate through the transmission gear.

[0029] (III) Beneficial Effects

[0030] This invention provides a micro-pattern printing device for the inner wall of a circular tube. It has the following beneficial effects:

[0031] 1. The micro-pattern printing device for the inner wall of the circular tube is designed with an adjustment mechanism. By installing a partition plate between the partition sleeve and the rotating gear shaft, and opening an airflow inlet on the rotating gear shaft, the position of the rotating gear shaft is adjusted according to the printing requirements. The size of the two cavities is controlled by adjusting the position of the partition plate, and the size of the airflow cavity is adjusted to achieve printing on the inner wall of the circular tube at different heights, thus achieving precise printing.

[0032] 2. The micro-pattern printing device on the inner wall of the circular tube is designed with a transmission mechanism. The transmission gear in the transmission mechanism drives the rotating gear shaft to rotate through the servo motor. The speed and direction of the servo motor are precisely controlled by the motor speed controller, thereby achieving precise changes in the volume of the left and right cavities. Attached Figure Description

[0033] Figure 1 This is a perspective view of the present invention;

[0034] Figure 2 This is a diagram of the internal structure of the mounting tube of the present invention;

[0035] Figure 3 These are jet printing images at different heights according to the present invention;

[0036] Figure 4 This is a jet printing pattern at different positions around the perimeter of the present invention;

[0037] Figure 5 for Figure 2 A magnified view of a section at point A in the middle;

[0038] Figure 6 This is a schematic diagram of the identical structure of the left and right airflow cavities of the present invention;

[0039] Figure 7 This is a schematic diagram of the maximum structure of the right airflow cavity of the present invention;

[0040] Figure 8 This is a schematic diagram of the maximum structure of the left airflow cavity of the present invention.

[0041] The components include: 1. Support plate; 2. Insulating pad; 3. Round tube fastener; 4. First double-ended stud fastener assembly; 5. Small-diameter round tube; 6. Mounting tube; 7. First air pump flow controller; 8. First air compressor; 9. Second air pump flow controller; 10. Second air compressor; 11. Electrospinning liquid connector; 12. Second double-ended stud fastener assembly; 13. High-voltage power supply; 14. Needle; 15. Partition sleeve; 16. First mounting groove; 17. First partition plate; 18. Rotating gear shaft; 19. First airflow inlet; 20. Second airflow inlet; 21. Second mounting groove; 22. Second partition plate; 23. Fixing block; 24. Servo motor; 25. Connecting key; 26. Transmission gear; 27. Motor speed controller. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] Example:

[0044] Please see Figure 1 - Figure 4A micro-pattern printing device for the inner wall of a circular tube includes a support plate 1. An insulating pad 2 is fixedly connected to the top of the support plate 1 near its center. A circular tube fixing component 3 is fixedly connected to the top of the insulating pad 2. The circular tube fixing component 3 needs to be grounded. Multiple first double-headed stud fastener groups 4 are installed on the outer wall of the circular tube fixing component 3. A small-diameter circular tube 5 is installed near the center of the top of the circular tube fixing component 3. An installation tube 6 is installed on the top of the small-diameter circular tube 5. The outer wall of the installation tube 6 is connected to a first air compressor 8 and a second air compressor 10 via air pipes. The first air compressor 8 and the second air compressor 10 are installed symmetrically on the outer wall of the installation tube 6. Symmetrical installation helps to evenly distribute weight and pressure on the structure of the installation tube 6, reducing the possibility of imbalance and deformation. This contributes to the overall stability and durability of the equipment. Through symmetrical installation, the working efficiency of the first air compressor 8 and the second air compressor 10 can be improved because the two compressors can operate in balance, reducing the generation of excessive pressure and improving overall performance. Both the first air compressor 8 and the second air compressor 10 are equipped with corresponding first air pump flow controllers. The device 7 and the second air pump flow controller 9 are respectively installed on the top of the mounting tube 6. An electrospinning liquid connector 11 and a second double-ended stud fastener assembly 12 are respectively installed on the top of the electrospinning liquid connector 11. A high-voltage power supply 13 is installed on one side of the top of the electrospinning liquid connector 11. A needle 14 is installed inside the mounting tube 6. The needle 14 is installed inside the mounting tube 6 and can spray the electrospinning liquid onto the inner wall of the small-diameter circular tube 5. Various shapes and patterns can be sprayed onto the small-diameter circular tube 5 according to actual needs. The top of the needle 14 is fixedly connected to the bottom of the electrospinning liquid connector 11. This fixed connection ensures the safety of the needle 14. The connection between the needle 14 and the electrospinning fluid connector 11 is more robust, reducing the risk of leakage, especially under high pressure or high flow conditions. The robust connection means higher transmission efficiency between the needle 14 and the electrospinning fluid connector 11, allowing for more efficient injection or extraction of the electrospinning fluid and improving work efficiency. The needle 14 is equipped with a jetting assembly inside, which enables more precise jetting and positioning. Since the jetting source is located directly at or near the tip of the needle 14, the jetting material can be released directly from the desired location, improving the accuracy of printing.

[0045] like Figure 2 and Figure 6 - Figure 8As shown, the outer wall of the needle 14 is provided with an adjustment mechanism, which includes a partition sleeve 15 installed on the outer wall of the needle 14. A first mounting groove 16 is formed inside the partition sleeve 15, and a first partition plate 17 is installed inside the first mounting groove 16. A rotating gear shaft 18 is rotatably connected inside the mounting tube 6. A first airflow inlet 19 and a second airflow inlet 20 are respectively formed inside the rotating gear shaft 18. A second mounting groove 21 is formed inside the rotating gear shaft 18, and a second partition plate 22 is installed inside the second mounting groove 21. The other end of the first partition plate 17 slides against the inner wall of the rotating gear shaft 18, and the other end of the second partition plate 22 slides against the outer wall of the partition sleeve 15. This tight fit ensures that the airflow entering the sleeve will not leak out through the gap between the two, thus ensuring... The device can operate normally. The partition sleeve 15 and the rotating gear shaft 18 form an airflow cavity. During operation, the partition sleeve 15 and the first partition plate 17 installed on it are fixed. The rotating gear shaft 18 and the second partition plate 22 installed on it rotate back and forth under the meshing of the gears, thereby changing the angle between the partition plates and thus adjusting the size of the left and right cavities. By adjusting the size of the airflow cavity, printing can be achieved at any position on the inner wall of the small-diameter circular tube 5. The left and right cavities have airflow inlets respectively. The airflow size of the left and right cavities is adjusted by the first air pump flow controller 7 and the second air pump flow controller 9, thereby achieving the airflow intensity ratio of the left and right cavities and thus achieving printing at any height position on the inner wall of the small-diameter circular tube 5.

[0046] like Figure 1 - Figure 5 As shown, a transmission mechanism is provided on the other side of the mounting tube 6. The transmission mechanism includes a fixed block 23 mounted on the other side of the mounting tube 6. A servo motor 24 is mounted on the top of the fixed block 23. A connecting key 25 is fixedly connected to the output end of the servo motor 24. A transmission gear 26 is mounted on the outer wall of the connecting key 25. The fixed block 23 has mounting holes corresponding to the servo motor 24 and the transmission gear 26. Through the mounting holes corresponding to the servo motor 24 and the transmission gear 26, it can be ensured that their positions and orientations inside the fixed block 23 are completely consistent with the design requirements. This allows for precise installation and ensures the normal operation of the transmission system. A motor speed controller 27 is installed on one side of the top of the machine 24. The motor speed controller 27 controls the speed and direction of the servo motor 24. The output shaft of the servo motor 24 is connected to the transmission gear 26 via the connecting key 25. The transmission gear 26 is installed between the servo motor 24 and the rotating gear shaft 18. The servo motor 24 can provide precise speed and torque control. Combined with the rotating gear shaft 18, more precise motion control can be achieved. The transmission gear 26 can make the rotation of the servo motor 24 drive the rotating gear shaft 18 to rotate. The transmission gear 26 drives the rotating gear shaft 18 to rotate back and forth, thereby changing the size of the left and right cavities.

[0047] Working principle: Before printing, the operator needs to first determine and fix the small-diameter round tube 5. The small-diameter round tube 5 is fixed onto the insulating pad 2 using the first double-ended stud fastener group 4 and the round tube fixing part 3. Then, the insulating pad 2 is installed onto the support plate 1. After completing the installation of the small-diameter round tube 5, the internal parts of the mounting tube 6 are installed. First, the first partition plate 17 is installed in the designated first mounting groove 16 of the partition sleeve 15. Then, the partition sleeve 15 is fitted onto the outer wall of the needle 14 and fixedly connected using relevant parts. At this point, the second partition plate 22 is installed into the second mounting groove 21 of the rotating gear shaft 18, ensuring that the first partition plate 17 and the second partition plate 22 can... Sliding between the two, the partition sleeve 15 and the rotating gear shaft 18 form an airflow cavity. During operation, the partition sleeve 15 and the first partition plate 17 mounted on it are fixed, while the rotating gear shaft 18 and the second partition plate 22 mounted on it rotate back and forth under the meshing of the gears, thereby changing the angle between the partition plates and thus adjusting the size of the left and right cavities. By adjusting the size of the airflow cavity, printing can be achieved at any position around the inner wall of the small-diameter circular tube 5. The left and right cavities each have airflow inlets. The airflow magnitude of the left and right cavities is adjusted by the first air pump flow controller 7 and the second air pump flow controller 9, thereby achieving the airflow intensity ratio between the left and right cavities, thus enabling printing on the small diameter circular tube 5. Printing at any height on the inner wall of the small-diameter circular tube 5: After the internal parts are installed, the entire mechanism is inserted into the mounting tube 6, and one end of the needle 14 is connected to the electrospinning liquid connector 11 and fastened using the second double-ended stud fastener assembly 12. The first air compressor 8 and the second air compressor 10, along with the corresponding first air pump flow controller 7 and second air pump flow controller 9, are respectively installed on the outer wall of the mounting tube 6. By adjusting the airflow on both sides through the first air pump flow controller 7 and the second air pump flow controller 9, an airflow pressure difference is formed, enabling printing at any height on the inner wall of the small-diameter circular tube 5 to obtain various micro-nano structures such as nanofibers and nanoparticles. After the installation of the mounting tube 6 is completed... After the initial setup, the transmission mechanism needs to be installed. Connect the output end of the servo motor 24 to the key 25, and install the transmission gear 26 between the key 25 and the rotating gear shaft 18. The transmission gear 26 allows the servo motor 24 to rotate, driving the rotating gear shaft 18. Then, install the servo motor 24 into the fixing block 23 and connect the motor speed controller 27 to the servo motor 24. The motor speed controller 27 controls the speed and direction of the servo motor 24. After completing the overall installation, printing can begin on the inner wall of the target pipe. The speed and direction of the servo motor 24 drive the rotating gear shaft 18 to rotate synchronously, thereby controlling the size of the left and right cavities.The airflow pressure difference between the left and right cavities is then controlled by the first air pump flow controller 7 and the second air pump flow controller 9, ultimately achieving electrospinning and inkjet printing on the circumferential and height directions of the inner wall of the small-diameter circular tube 5, thus fulfilling the printing requirements.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A micro-pattern printing device for the inner wall of a circular tube, comprising a support plate (1), characterized in that: An insulating pad (2) is fixedly connected to the top of the support plate (1) near the center position. A round tube fastener (3) is fixedly connected to the top of the insulating pad (2). Multiple first double-headed stud fastener groups (4) are installed on the outer wall of the round tube fastener (3). A small diameter round tube (5) is installed on the top of the round tube fastener (3) near the center position. The top of the small-diameter circular tube (5) is equipped with an installation tube (6). The outer wall of the installation tube (6) is connected to a first air compressor (8) and a second air compressor (10) via air pipes. The first air compressor (8) and the second air compressor (10) are each equipped with a corresponding first air pump flow controller (7) and a second air pump flow controller (9). The top of the installation tube (6) is equipped with an electrospinning liquid connector (11) and a second double-headed stud fastener assembly (12). A high-voltage power supply (13) is installed on one side of the top of the electrospinning liquid connector (11). A needle (14) is installed inside the installation tube (6). An adjustment mechanism is provided on the outer wall of the needle (14). A transmission mechanism is provided on one side of the mounting tube (6); The adjustment mechanism includes a partition sleeve (15) installed on the outer wall of the needle (14). The partition sleeve (15) has a first mounting groove (16) inside. A first partition plate (17) is installed inside the first mounting groove (16). A rotating gear shaft (18) is rotatably connected inside the mounting tube (6). A first airflow inlet (19) and a second airflow inlet (20) are respectively opened inside the rotating gear shaft (18). A second mounting groove (21) is opened inside the rotating gear shaft (18). A second partition plate (22) is installed inside the second mounting groove (21). The other end of the first partition plate (17) is attached to and slides against the inner wall of the rotating gear shaft (18), and the other end of the second partition plate (22) is attached to and slides against the outer wall of the partition sleeve (15).

2. The micro-pattern printing device for the inner wall of a circular tube according to claim 1, characterized in that: The first air compressor (8) and the second air compressor (10) are installed on the outer wall of the mounting pipe (6) in a symmetrical structure.

3. The micro-pattern printing device for the inner wall of a circular tube according to claim 1, characterized in that: The top of the needle (14) is fixedly connected to the bottom of the electrospinning fluid connector (11).

4. The micro-pattern printing device for the inner wall of a circular tube according to claim 1, characterized in that: The needle (14) is equipped with a spraying assembly inside.

5. The micro-pattern printing device for the inner wall of a circular tube according to claim 1, characterized in that: The transmission mechanism includes a fixed block (23) installed on the other side of the mounting tube (6), a servo motor (24) is installed on the top of the fixed block (23), a connecting key (25) is fixedly connected to the output end of the servo motor (24), a transmission gear (26) is installed on the outer wall of the connecting key (25), and a motor speed controller (27) is installed on one side of the top of the servo motor (24).

6. The micro-pattern printing device for the inner wall of a circular tube according to claim 5, characterized in that: The fixed block (23) has mounting holes inside that correspond to the servo motor (24) and the transmission gear (26).

7. The micro-pattern printing device for the inner wall of a circular tube according to claim 5, characterized in that: The transmission gear (26) is installed between the servo motor (24) and the rotating gear shaft (18).

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