Batch electrospinning device with open sawtooth nozzle

Abstract

The present invention discloses a batch electrospinning device with an open sawtooth nozzle, belonging to the field of electrostatic spinning technology. The batch electrospinning device with an open sawtooth nozzle comprises an upper gland, a first liquid inlet is provided at the center of the top of the upper gland, a liquid inlet conduit is fixedly connected to the inner wall of the first liquid inlet, and first reserved holes are symmetrically provided on both sides of the upper gland. The solution channel in the batch electrospinning device proposed by the present invention is open, and the channel gap size can be quickly adjusted as needed during the electrospinning process without interrupting electrospinning. The solution flow rate can be changed to prepare mixed fiber membranes of different diameters. The open solution channel is not easily blocked and is easy to clean. In addition, by vibrating the nozzle structure by providing an electric telescopic vibration rod, the high-viscosity electrospinning solution can be assisted to overcome surface tension, and a Taylor cone is easily formed at the sawtooth tip to form an electrospinning jet.

Description

Technical Field

[0001] The invention belongs to the technical field of electrostatic spinning, and in particular relates to a batch electrospinning device with an open sawtooth nozzle. Background Art

[0002] Electrospinning has the advantages of simple process, easy control, low cost and wide source of materials. The fiber membrane prepared has the characteristics of small diameter, high porosity, large specific surface area and high permeability. It is a relatively popular method for manufacturing nanofibers in recent years.

[0003] However, the low output of nanofibers has always been a bottleneck problem in the development of electrospinning technology. The nanofiber output prepared by conventional single-needle electrospinning devices is small and can only meet the needs of laboratory research. At present, most batch electrospinning devices mainly use multi-channel to form multi-nozzle methods to improve electrospinning production capacity. However, during the spinning process, the needle is closed on all sides and has small pores, which is prone to clogging, causing electrospinning interruption. In addition, the needle size cannot be adjusted, and electrospinning needs to be interrupted to change the solution channel size by replacing needles of different models. The operation is time-consuming and cumbersome, affecting spinning production capacity. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a batch electrospinning device with an open sawtooth nozzle.

[0005] The technical solution adopted to solve the above technical problems is: a batch electrospinning device with an open serrated nozzle, comprising an upper pressure cover, a first liquid inlet is provided at the center position of the top of the upper pressure cover, a liquid inlet duct is fixedly connected to the inner wall of the first liquid inlet, first reserved holes are symmetrically provided on both sides of the upper pressure cover, first opening and closing controllers are installed on the outer wall of the upper pressure cover near the first reserved holes, the telescopic rods of the first opening and closing controllers pass through the adjacent first reserved holes respectively, and the telescopic rods of the first opening and closing controllers are fixedly connected to the first springs, the bottom position of the inner wall of the upper pressure cover is fixedly connected to the first opening and closing plate, the movable plate of the first opening and closing plate is fixedly connected to the first spring, the first electric telescopic vibration rods are symmetrically installed on the inner top surface of the upper pressure cover, and a nozzle structure is provided inside the upper pressure cover.

[0006] Through the above technical solution, the liquid inlet conduit is connected to the liquid supply device of the electrospinning solution, so that the liquid supply device can transport the electrospinning solution into the upper pressure cover, and at the same time the nozzle structure is connected to a high-voltage power supply, so that the electrospinning solution forms a Taylor cone at the tip of the sawtooth under the action of the high-voltage electric field and is stretched into a fiber. The solution channel between the upper pressure cover and the nozzle structure is open, and the solution enters the solution channel from the first liquid inlet in the middle, so that the nozzle structure is not easy to be blocked, and the upper pressure cover and the nozzle structure can be disassembled for easy cleaning.

[0007] Furthermore, the nozzle structure includes a first serrated nozzle, which is arranged on the inner side of the first opening and closing plate, and the top surface of the first serrated nozzle is fixedly connected to the telescopic rod of the first electric telescopic vibration rod.

[0008] Through the above technical solution, the first serrated nozzle is connected to the first electric telescopic vibration rod, so that the first electric telescopic vibration rod can drive the first serrated nozzle to move, thereby changing the distance between the first serrated nozzle and the upper pressure cover, and realizing rapid adjustment of the solution channel size, thereby realizing rapid adjustment of the electrospinning liquid supply flow rate. For high-viscosity solutions, the first electric telescopic vibration rod can realize high-frequency vibration, assisting the tip solution of the first serrated nozzle to overcome surface tension and quickly form a Taylor cone. Moreover, since the first serrated nozzle is arranged on the inner side of the first opening and closing plate, the first opening and closing controller can be used to extend the telescopic rod of the first opening and closing controller, thereby changing the first spring from a compressed state to a relaxed state, and driving the movable plate of the first opening and closing plate to move, quickly closing the solution channel, and realizing instantaneous flow cessation of the electrospinning solution.

[0009] Furthermore, the nozzle structure includes a second serrated nozzle, the top surface of the second serrated nozzle is fixedly connected to the telescopic rod of the first electric telescopic vibration rod, a second liquid inlet is provided at the center position of the top of the second serrated nozzle, and second reserved holes are symmetrically provided on both sides of the second serrated nozzle. A second opening and closing controller is installed on the outer wall of the second serrated nozzle near the second reserved holes, and the telescopic rods of the second opening and closing controller pass through the adjacent second reserved holes respectively. A second spring is fixedly connected to the telescopic rods of the second opening and closing controller, so that the first serrated nozzle can realize simultaneous electrospinning of multiple jets to improve production. The solution channel can be quickly adjusted on demand, and the liquid inlet speed can be quickly changed to prepare mixed fiber membranes of different diameters.

[0010] Furthermore, a second opening and closing plate is fixedly connected to the bottom position of the inner wall of the second serrated nozzle, the movable plate of the second opening and closing plate is fixedly connected to the second spring, a second electric telescopic vibration rod is symmetrically installed on the inner top surface of the second serrated nozzle, and a third serrated nozzle is fixedly connected to the telescopic rod of the second electric telescopic vibration rod.

[0011] Through the above technical solution, the second sawtooth nozzle and the third sawtooth nozzle are combined to form a double-layer sawtooth nozzle. When the first electric telescopic vibration rod and the second electric telescopic vibration rod are used in conjunction with each other, the size of the solution channel can be adjusted, and mixed fiber membranes with different fibers and different diameters can be prepared at the same time.

[0012] Furthermore, the nozzle structure includes a fourth serrated nozzle, the top surface of the fourth serrated nozzle is fixedly connected to the telescopic rod of the first electric telescopic vibration rod, a first connecting port is provided at the center position of the top of the fourth serrated nozzle, and third reserved holes are symmetrically provided on both sides of the top of the fourth serrated nozzle.

[0013] Furthermore, a third opening and closing controller is installed on the top surface of the fourth serrated nozzle near the third reserved hole, and the telescopic rods of the third opening and closing controller pass through the adjacent third reserved holes respectively. The telescopic rods of the third opening and closing controller are fixedly connected with a third spring, and a fifth serrated nozzle is fixedly connected to the inner top surface of the fourth serrated nozzle, and the fifth serrated nozzle is fixedly connected to the third springs on both sides. The fifth serrated nozzle is a flexible serrated nozzle.

[0014] Through the above technical solution, the fifth serrated nozzle is a flexible serrated nozzle. When there is no external force, the channel of the fifth serrated nozzle is in a closed state. When the third opening and closing controller is used, the telescopic rod of the third opening and closing controller will retract, causing the third spring to change from a relaxed state to a stretched state, so that the fifth serrated nozzle keeps the solution channel of the fifth serrated nozzle open under the action of the spring force. By closing the third opening and closing controller, the telescopic rod of the third opening and closing controller is reset, and the third spring is quickly reset, driving the flexible fifth serrated nozzle to reset and close, thereby realizing instantaneous flow cessation of the electrospinning solution.

[0015] Furthermore, the nozzle structure includes a sixth serrated nozzle, the top surface of the sixth serrated nozzle is fixedly connected to the telescopic rod of the first electric telescopic vibration rod, and a plurality of second connecting ports are evenly distributed on the top circumference of the sixth serrated nozzle, and the sixth serrated nozzle is provided with fourth reserved holes on both sides of the second connecting port.

[0016] Furthermore, a fourth opening and closing controller is installed on the top surface of the sixth serrated nozzle near the fourth reserved hole, and the telescopic rods of the fourth opening and closing controller pass through the adjacent fourth reserved holes respectively. The telescopic rods of the fourth opening and closing controller are fixedly connected with a fourth spring. The top surface of the inner part of the sixth serrated nozzle near the second connecting port is fixedly connected with a seventh serrated nozzle, and the seventh serrated nozzle is fixedly connected to the adjacent fourth spring. The seventh serrated nozzle is a flexible serrated nozzle.

[0017] Through the above technical solution, the seventh sawtooth nozzle and the fifth sawtooth nozzle are both flexible sawtooth nozzles, which can realize simultaneous electrospinning of multiple jets and achieve batch production of fibers.

[0018] Furthermore, the nozzle structure includes an eighth serrated nozzle, the top surface of the eighth serrated nozzle is fixedly connected to the telescopic rod of the first electric telescopic vibration rod, and a number of third connecting ports are evenly distributed on the top circumference of the eighth serrated nozzle. The top of the upper pressure cover is provided with a fifth reserved hole near the third connecting port, and the top surface of the upper pressure cover is installed with a fifth opening and closing controller near the fifth reserved hole.

[0019] Furthermore, the telescopic rods of the fifth opening and closing controller pass through the adjacent fifth reserved holes respectively, the telescopic rods of the fifth opening and closing controller are multi-stage telescopic rods, and the bottom surfaces of the telescopic rods of the fifth opening and closing controller are fixedly connected with cover plates, and the cover plates are arranged on the top of the adjacent third connecting ports, and the top surfaces of the cover plates are fixedly connected with fifth springs, and the top ends of the fifth springs are fixedly connected to the inner top surface of the upper pressure cover, and the inner top surface of the eighth serrated nozzle is fixedly connected with a ninth serrated nozzle near the third connecting port.

[0020] Through the above technical solution, the nozzle structure can also use a rigid ninth serrated nozzle for electrospinning. By using the fifth opening and closing controller, the telescopic rod of the fifth opening and closing controller can drive the cover plate to move, thereby changing the fifth spring from a relaxed state to a compressed state, opening the solution channel of the ninth serrated nozzle, realizing multi-jets and simultaneous electrospinning, and realizing mass production of fibers. By closing the fifth opening and closing controller, the telescopic rod of the fifth opening and closing controller will lose power, thereby changing the fifth spring from a compressed state to a relaxed state, driving the cover plate to quickly reset, blocking the solution channel opening, and realizing instantaneous flow cessation of the electrospinning solution.

[0021] The beneficial effects of the present invention are as follows:

[0022] The solution channel in the batch electrospinning device proposed in the present invention is open, and the channel gap size can be quickly adjusted as needed during the electrospinning process without interrupting electrospinning. The solution flow rate can be changed to prepare mixed fiber membranes of different diameters. The open solution channel is not easy to block and is easy to clean. By setting an electric telescopic vibration rod to vibrate the nozzle structure, it can assist high-viscosity electrospinning solution to overcome surface tension, easily forming a Taylor cone at the sawtooth tip to form an electrospinning jet. At the same time, the opening and closing controller can quickly close the solution channel and quickly stop the flow. The opening and closing controller can be installed at different positions of the channel according to the shape and position of the annular nozzle. The sawtooth nozzle can have multiple annularly arranged sawtooth tips, or multiple nozzles can be stacked in multiple layers, and electrospinning can be performed simultaneously to form multiple jets, thereby realizing batch production of fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2It is a partial structural schematic diagram of the present invention;

[0025] Figure 3 is a cross-sectional view of the present invention;

[0026] Figure 4 is a three-dimensional schematic diagram of embodiment 2 of the present invention;

[0027] Figure 5 is a cross-sectional view of a second embodiment of the present invention;

[0028] Figure 6 is a three-dimensional schematic diagram of embodiment 3 of the present invention;

[0029] Figure 7 is a cross-sectional view of a third embodiment of the present invention;

[0030] Figure 8 is a three-dimensional schematic diagram of a fourth embodiment of the present invention;

[0031] Figure 9 is a cross-sectional view of a fourth embodiment of the present invention;

[0032] Figure 10 is a three-dimensional schematic diagram of a fifth embodiment of the present invention;

[0033] Figure 11 It is a cross-sectional view of embodiment 5 of the present invention.

[0034] Figure 1: Upper gland; 2: First liquid inlet; 3: First reserved hole; 4: Liquid inlet conduit; 5: First opening and closing controller; 6: First spring; 7: First opening and closing plate; 8: First electric telescopic vibration rod; 9: First serrated nozzle; 10: Second serrated nozzle; 11: Second liquid inlet; 12: Second reserved hole; 13: Second opening and closing controller; 14: Second spring; 15: Second opening and closing plate; 16: Second electric telescopic vibration rod; 17: Third serrated nozzle; 18: Fourth serrated nozzle ;19. First connecting port;20. Third reserved hole;21. Third opening and closing controller;22. Third spring;23. Fifth serrated nozzle;24. Sixth serrated nozzle;25. Second connecting port;26. Fourth reserved hole;27. Fourth opening and closing controller;28. Fourth spring;29. Seventh serrated nozzle;30. Eighth serrated nozzle;31. Third connecting port;32. Ninth serrated nozzle;33. Fifth reserved hole;34. Fifth opening and closing controller;35. Fifth spring;36. Cover plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Example 1:

[0037] like Figure 1 、 Figure 2 and Figure 3 As shown, a batch electrospinning device with an open serrated nozzle in this embodiment comprises an upper pressure cover 1, a first liquid inlet 2 is provided at the center position of the top of the upper pressure cover 1, a liquid inlet conduit 4 is fixedly connected to the inner wall of the first liquid inlet 2, first reserved holes 3 are symmetrically provided on both sides of the upper pressure cover 1, first opening and closing controllers 5 are installed on the outer wall of the upper pressure cover 1 near the first reserved holes 3, the telescopic rods of the first opening and closing controller 5 pass through the adjacent first reserved holes 3 respectively, and the telescopic rods of the first opening and closing controller 5 are fixedly connected to the first spring 6, the bottom position of the inner wall of the upper pressure cover 1 is fixedly connected to the first opening and closing plate 7, the movable plate of the first opening and closing plate 7 is fixedly connected to the first spring 6, the first electric telescopic vibration rod 8 is symmetrically installed on the inner top surface of the upper pressure cover 1, and a nozzle structure is provided inside the upper pressure cover 1, the nozzle structure comprises a first serrated nozzle 9, the first serrated nozzle 9 is provided on the inner side of the first opening and closing plate 7, and the top surface of the first serrated nozzle 9 is fixedly connected to the telescopic rod of the first electric telescopic vibration rod 8.

[0038] During use, the liquid inlet conduit 4 is connected to the liquid supply device of the electrospinning solution so that the liquid supply device can transport the electrospinning solution into the upper gland 1, and the first serrated nozzle 9 is connected to a high-voltage power supply so that the electrospinning solution forms a Taylor cone at the serrated tip of the first serrated nozzle 9 under the action of the high-voltage electric field and is stretched into fibers. The first electric telescopic vibration rod 8 is driven by the first serrated nozzle 9 to move, thereby changing the distance between the first serrated nozzle 9 and the upper gland 1, so that the solution channel size can be quickly adjusted, thereby achieving rapid adjustment of the electrospinning liquid supply flow rate. For high-viscosity solutions, the first electric telescopic vibration rod 8 can achieve high-frequency vibration to assist the tip solution of the first serrated nozzle 9 to overcome surface tension and quickly form a Taylor cone. Since the first serrated nozzle 9 is arranged on the inner side of the first opening and closing plate 7, the first opening and closing controller 5 can be used to extend the telescopic rod of the first opening and closing controller 5, thereby changing the first spring 6 from a compressed state to a relaxed state, and driving the movable plate of the first opening and closing plate 7 to move, quickly closing the solution channel, and achieving instantaneous flow cessation of the electrospinning solution.

[0039] Example 2:

[0040] like Figure 4 and Figure 5As shown, the difference between this embodiment and the first embodiment is that: the nozzle structure includes a second serrated nozzle 10, the top surface of the second serrated nozzle 10 is fixedly connected to the telescopic rod of the first electric telescopic vibration rod 8, a second liquid inlet 11 is provided at the center position of the top of the second serrated nozzle 10, and second reserved holes 12 are symmetrically provided on both sides of the second serrated nozzle 10. A second opening and closing controller 13 is installed on the outer wall of the second serrated nozzle 10 near the second reserved holes 12, and the telescopic rods of the second opening and closing controller 13 pass through the adjacent second reserved holes 12 respectively, and the telescopic rods of the second opening and closing controller 13 are fixedly connected to the second spring 14, and a second opening and closing plate 15 is fixedly connected to the bottom position of the inner wall of the second serrated nozzle 10, and the movable plate of the second opening and closing plate 15 is fixedly connected to the second spring 14, and a second electric telescopic vibration rod 16 is symmetrically installed on the inner top surface of the second serrated nozzle 10, and a third serrated nozzle 17 is fixedly connected to the telescopic rod of the second electric telescopic vibration rod 16.

[0041] When in use, the second sawtooth nozzle 10 and the third sawtooth nozzle 17 are connected to a high-voltage power supply, and the two sawtooth nozzles are used in combination to form a double-layer sawtooth nozzle. With the cooperation of the first electric telescopic vibration rod 8 and the second electric telescopic vibration rod 16, the size of the solution channel is adjusted, and mixed fiber membranes with different fibers and different diameters can be prepared at the same time. In addition, with the cooperation of the first opening and closing controller 5 and the second opening and closing controller 13, the two solution channels can be closed at the same time to achieve instantaneous flow cessation of the electrospinning solution.

[0042] Example 3:

[0043] like Figure 6 and Figure 7 As shown, the difference between this embodiment and the first embodiment is that: the nozzle structure includes a fourth serrated nozzle 18, the top surface of the fourth serrated nozzle 18 is fixedly connected to the telescopic rod of the first electric telescopic vibration rod 8, a first connecting port 19 is provided at the center position of the top of the fourth serrated nozzle 18, and third reserved holes 20 are symmetrically provided on both sides of the top of the fourth serrated nozzle 18. A third opening and closing controller 21 is installed at a position near the third reserved hole 20 on the top surface of the fourth serrated nozzle 18, and the telescopic rods of the third opening and closing controller 21 pass through the adjacent third reserved holes 20 respectively. A third spring 22 is fixedly connected to the telescopic rod of the third opening and closing controller 21, and a fifth serrated nozzle 23 is fixedly connected to the inner top surface of the fourth serrated nozzle 18. The fifth serrated nozzle 23 is fixedly connected to the third springs 22 on both sides. The fifth serrated nozzle 23 is a flexible serrated nozzle.

[0044] During use, the fourth serrated nozzle 18 and the fifth serrated nozzle 23 are connected to a high-voltage power supply. When there is no external force, the channel of the fifth serrated nozzle 23 is in a closed state. When the third opening and closing controller 21 is used, the telescopic rod of the third opening and closing controller 21 will retract, causing the third spring 22 to change from a relaxed state to a stretched state, so that the fifth serrated nozzle 23 keeps the solution channel of the fifth serrated nozzle 23 open under the action of the spring force, and performs efficient electrostatic spinning. By closing the third opening and closing controller 21, the telescopic rod of the third opening and closing controller 21 is reset, and the third spring 22 is quickly reset, driving the flexible fifth serrated nozzle 23 to reset and close, thereby achieving instant cessation of the electrospinning solution.

[0045] Example 4:

[0046] like Figure 8 and Figure 9 As shown, the difference between this embodiment and the first embodiment is that: the nozzle structure includes a sixth serrated nozzle 24, the top surface of the sixth serrated nozzle 24 is fixedly connected to the telescopic rod of the first electric telescopic vibration rod 8, and a plurality of second connecting ports 25 are evenly distributed on the top circumference of the sixth serrated nozzle 24. The sixth serrated nozzle 24 is provided with fourth reserved holes 26 at both sides of the second connecting port 25, and a fourth opening and closing controller 27 is installed on the top surface of the sixth serrated nozzle 24 near the fourth reserved holes 26. The telescopic rods of the fourth opening and closing controller 27 pass through the adjacent fourth reserved holes 26 respectively, and the telescopic rods of the fourth opening and closing controller 27 are fixedly connected to the fourth spring 28. The inner top surface of the sixth serrated nozzle 24 near the second connecting port 25 is fixedly connected to the seventh serrated nozzle 29, and the seventh serrated nozzle 29 is fixedly connected to the adjacent fourth spring 28. The seventh serrated nozzle 29 is a flexible serrated nozzle.

[0047] When in use, the sixth sawtooth nozzle 24 and the seventh sawtooth nozzle 29 are connected to a high-voltage power supply, and the fourth opening and closing controller 27 can be used to control the opening and closing state of the seventh sawtooth nozzle 29 to achieve simultaneous electrospinning of multiple jets and realize mass production of fibers.

[0048] Embodiment 5:

[0049] like Figure 10 and Figure 11As shown, the difference between this embodiment and the first embodiment is that: the nozzle structure includes an eighth sawtooth nozzle 30, the top surface of the eighth sawtooth nozzle 30 is fixedly connected to the telescopic rod of the first electric telescopic vibration rod 8, a plurality of third communication ports 31 are evenly distributed on the top circumference of the eighth sawtooth nozzle 30, a fifth reserved hole 33 is provided at the top of the upper pressure cover 1 near the third communication port 31, a fifth opening and closing controller 34 is installed at the top surface of the upper pressure cover 1 near the fifth reserved hole 33, and the telescopic control of the fifth opening and closing controller 34 is provided. The rods pass through the adjacent fifth reserved holes 33 respectively. The telescopic rod of the fifth opening and closing controller 34 is a multi-stage telescopic rod. The bottom surface of the telescopic rod of the fifth opening and closing controller 34 is fixedly connected with a cover plate 36. The cover plates 36 are all arranged on the top of the adjacent third connecting port 31. The top surface of the cover plate 36 is fixedly connected with a fifth spring 35. The top end of the fifth spring 35 is fixedly connected to the inner top surface of the upper pressure cover 1. The inner top surface of the eighth serrated nozzle 30 near the third connecting port 31 is fixedly connected with the ninth serrated nozzle 32.

[0050] During use, the eighth serrated nozzle 30 and the ninth serrated nozzle 32 are connected to a high-voltage power supply. By using the fifth opening and closing controller 34, the telescopic rod of the fifth opening and closing controller 34 can drive the cover plate 36 to move, thereby changing the fifth spring 35 from a relaxed state to a compressed state, opening the solution channel of the ninth serrated nozzle 32, realizing simultaneous electrospinning of multiple jets, and realizing mass production of fibers. By closing the fifth opening and closing controller 34, the telescopic rod of the fifth opening and closing controller 34 will lose power, thereby changing the fifth spring 35 from a compressed state to a relaxed state, driving the cover plate 36 to quickly reset, blocking the solution channel opening, and realizing instantaneous flow cessation of the electrospinning solution.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A batch electrospinning device with an open sawtooth nozzle, comprising an upper pressure cover (1), characterized in that: A first liquid inlet (2) is provided at the center position of the top of the upper pressure cover (1), a liquid inlet conduit (4) is fixedly connected to the inner wall of the first liquid inlet (2), first reserved holes (3) are symmetrically provided on both sides of the upper pressure cover (1), first opening and closing controllers (5) are installed at positions of the outer wall of the upper pressure cover (1) close to the first reserved holes (3), telescopic rods of the first opening and closing controllers (5) respectively pass through the adjacent first reserved holes (3), and first springs (6) are fixedly connected to the telescopic rods of the first opening and closing controllers (5), a first opening and closing plate (7) is fixedly connected to the bottom position of the inner wall of the upper pressure cover (1), a movable plate of the first opening and closing plate (7) is fixedly connected to the first spring (6), a first electric telescopic vibration rod (8) is symmetrically installed on the inner top surface of the upper pressure cover (1), and a nozzle structure is provided inside the upper pressure cover (1); The nozzle structure comprises a first sawtooth nozzle (9), the first sawtooth nozzle (9) being arranged on the inner side of the first opening and closing plate (7), and the top surface of the first sawtooth nozzle (9) being fixedly connected to the telescopic rod of the first electric telescopic vibration rod (8).

2. The batch electrospinning device with an open sawtooth nozzle according to claim 1, characterized in that: The nozzle structure comprises a second sawtooth nozzle (10), the top surface of the second sawtooth nozzle (10) is fixedly connected to the telescopic rod of the first electric telescopic vibration rod (8), a second liquid inlet (11) is provided at the center position of the top of the second sawtooth nozzle (10), second reserved holes (12) are symmetrically provided on both sides of the second sawtooth nozzle (10), second opening and closing controllers (13) are installed at positions near the second reserved holes (12) on the outer wall of the second sawtooth nozzle (10), the telescopic rods of the second opening and closing controller (13) respectively pass through the adjacent second reserved holes (12), and the telescopic rods of the second opening and closing controller (13) are fixedly connected to the second springs (14).

3. The batch electrospinning device with an open sawtooth nozzle according to claim 2, characterized in that: A second opening and closing plate (15) is fixedly connected to the bottom position of the inner wall of the second sawtooth nozzle (10), and a movable plate of the second opening and closing plate (15) is fixedly connected to the second spring (14). A second electric telescopic vibration rod (16) is symmetrically installed on the inner top surface of the second sawtooth nozzle (10), and a third sawtooth nozzle (17) is fixedly connected to the telescopic rod of the second electric telescopic vibration rod (16).

4. The batch electrospinning device with an open sawtooth nozzle according to claim 1, characterized in that: The nozzle structure comprises a fourth sawtooth nozzle (18), the top surface of the fourth sawtooth nozzle (18) being fixedly connected to the telescopic rod of the first electric telescopic vibration rod (8), a first connecting port (19) being provided at the center position of the top of the fourth sawtooth nozzle (18), and third reserved holes (20) being symmetrically provided on both sides of the top of the fourth sawtooth nozzle (18).

5. The batch electrospinning device with an open sawtooth nozzle according to claim 4, characterized in that: A third opening and closing controller (21) is installed at a position near the third reserved hole (20) on the top surface of the fourth sawtooth nozzle (18), and the telescopic rods of the third opening and closing controller (21) respectively pass through the adjacent third reserved holes (20). The telescopic rods of the third opening and closing controller (21) are fixedly connected to the third springs (22). A fifth sawtooth nozzle (23) is fixedly connected to the inner top surface of the fourth sawtooth nozzle (18), and the fifth sawtooth nozzle (23) is fixedly connected to the third springs (22) on both sides. The fifth sawtooth nozzle (23) is a flexible sawtooth nozzle.

6. The batch electrospinning device with an open sawtooth nozzle according to claim 1, characterized in that: The nozzle structure comprises a sixth sawtooth nozzle (24), the top surface of the sixth sawtooth nozzle (24) being fixedly connected to the telescopic rod of the first electric telescopic vibration rod (8), a plurality of second communication openings (25) being evenly distributed on the top circumference of the sixth sawtooth nozzle (24), and fourth reserved holes (26) being provided at positions on both sides of the second communication opening (25) of the sixth sawtooth nozzle (24).

7. The batch electrospinning device with an open sawtooth nozzle according to claim 6, characterized in that: A fourth opening and closing controller (27) is installed at a position near the fourth reserved hole (26) on the top surface of the sixth sawtooth nozzle (24), and the telescopic rods of the fourth opening and closing controller (27) respectively pass through the adjacent fourth reserved holes (26). The telescopic rods of the fourth opening and closing controller (27) are fixedly connected to the fourth spring (28). A seventh sawtooth nozzle (29) is fixedly connected to a position near the second connecting port (25) on the inner top surface of the sixth sawtooth nozzle (24), and the seventh sawtooth nozzle (29) is fixedly connected to the adjacent fourth spring (28). The seventh sawtooth nozzle (29) is a flexible sawtooth nozzle.

8. The batch electrospinning device with an open sawtooth nozzle according to claim 1, characterized in that: The nozzle structure comprises an eighth sawtooth nozzle (30), the top surface of the eighth sawtooth nozzle (30) is fixedly connected to the telescopic rod of the first electric telescopic vibration rod (8), a plurality of third communication ports (31) are evenly distributed on the top circumference of the eighth sawtooth nozzle (30), a fifth reserved hole (33) is provided at the top of the upper pressure cover (1) near the third communication ports (31), and a fifth opening and closing controller (34) is installed at the top surface of the upper pressure cover (1) near the fifth reserved hole (33).

9. The batch electrospinning device with an open sawtooth nozzle according to claim 8, characterized in that: The telescopic rods of the fifth opening and closing controller (34) respectively pass through the adjacent fifth reserved holes (33). The telescopic rods of the fifth opening and closing controller (34) are multi-stage telescopic rods. The bottom surfaces of the telescopic rods of the fifth opening and closing controller (34) are fixedly connected with cover plates (36). The cover plates (36) are arranged on the top of the adjacent third connecting port (31). The top surfaces of the cover plates (36) are fixedly connected with fifth springs (35). The top ends of the fifth springs (35) are fixedly connected to the inner top surface of the upper pressure cover (1). The inner top surface of the eighth sawtooth nozzle (30) near the third connecting port (31) is fixedly connected with a ninth sawtooth nozzle (32).

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