An electrospinning device with fast switching of spinning nozzles

Abstract

The invention relates to the field of electrostatic spinning, and discloses an electrostatic spinning device with fast switching of spinning nozzles, comprising a fixed upper nozzle, a quick-cut lower nozzle, a switching mounting plate, and a switching drive unit, wherein the switching mounting plate is located below the fixed upper nozzle, a plurality of quick-cut lower nozzles are mounted on the switching mounting plate, the switching drive unit is used to drive the position of the quick-cut lower nozzle on the switching mounting plate to correspond to the position of the fixed upper nozzle, and to make the quick-cut lower nozzle embedded in the inner side of the fixed upper nozzle from bottom to top, the quick-cut lower nozzle is a coiled spring tube structure, a plurality of coiled spring drive units are arranged on the switching mounting plate, the quick-cut lower nozzle corresponds to the coiled spring drive unit one by one, the coiled spring drive unit is used to adjust the tightness of the quick-cut lower nozzle to adjust the size of the outer diameter of the quick-cut lower nozzle, and the invention can quickly complete the switching of electrospinning nozzles and effectively improve the electrospinning efficiency.

Description

Technical Field

[0001] The invention relates to the field of electrostatic spinning, in particular to an electrostatic spinning device with fast switching of spinning nozzles. Background Art

[0002] The electrospinning process is simple, easy to control, low cost, and has a wide range of material sources. The prepared fiber membrane 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] At present, most batch electrospinning devices mainly use multi-channel to form multi-nozzle to improve the electrospinning capacity (Wei Liang, Sun Runjun, Liu Chengkun, et al. An electrospinning nozzle and an electrospinning system having the same). However, during the spinning process, the nozzle may be blocked and the nozzle needs to be replaced as a whole, which interrupts the spinning production and affects the spinning efficiency and capacity.

[0004] Some electrospinning devices adopt a mode in which the nozzles can be replaced individually (Lu Qilin, Ran Linlin, Chen Shichao, et al. Nanofiber membrane preparation system based on electrospinning:, CN212582041U[P]. 2021.), but the replacement of the nozzle still requires the suspension of production to replace the nozzle, which affects the spinning capacity. Summary of the invention

[0005] Therefore, it is necessary to provide an electrospinning device with fast switching of spinning nozzles to solve the problem that the existing electrospinning cannot quickly switch the nozzles, thus affecting the electrospinning efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides an electrospinning device with fast switching of spinning nozzles, comprising a fixed upper nozzle, a quick-cut lower nozzle, a switching mounting plate, and a switching drive unit, wherein the switching mounting plate is located below the fixed upper nozzle, and a plurality of quick-cut lower nozzles are mounted on the switching mounting plate, and the switching drive unit is used to drive the position of the quick-cut lower nozzle on the switching mounting plate to correspond to the position of the fixed upper nozzle, and to make the quick-cut lower nozzle embedded in the inner side of the fixed upper nozzle from bottom to top.

[0007] The quick-cut nozzle is a coil spring tube structure, and a plurality of coil spring drive units are provided on the switching mounting plate. The quick-cut nozzle corresponds to the coil spring drive unit one by one, and the coil spring drive unit is used to adjust the tightness of the quick-cut nozzle to adjust the size of the outer diameter of the quick-cut nozzle.

[0008] Furthermore, a mounting hole is provided on the switching mounting plate, and the quick-cut lower nozzle is fixed in the mounting hole. The coil spring tube structure of the quick-cut lower nozzle includes an inner fixed end and an outer elastic end. The inner fixed end is fixed to the bottom edge of the mounting hole, and the outer elastic end is connected with a tensioning strip. A guide groove is provided on the side of the mounting hole on the switching mounting plate, and the guide groove corresponds to the position of the tensioning strip. The tensioning strip extends into the guide groove, and the coil spring driving unit drives the tensioning strip to slide in the guide groove to adjust the tightness of the quick-cut lower nozzle.

[0009] The inner side of the coil spring barrel is a fixed end. When the outer side is tightened, the coil spring barrel tends to tighten due to the fixation of the inner side, thereby reducing the outer diameter, making it easier to quickly cut the lower nozzle and embed it into the fixed upper nozzle.

[0010] Furthermore, a high-density mass block is provided at the end of the tension strip, and the coil spring driving unit is used to drive the quick-cut nozzle to rotate. The high-density mass block tightens the tension strip under the action of centrifugal force, thereby changing the outer diameter of the quick-cut nozzle. When the quick-cut nozzle rotates at high speed, the high-density mass block moves away from the center of the circle along the guide groove, tightens the coil spring, and thus reduces the nozzle diameter.

[0011] Furthermore, the switching mounting plate is provided with a mounting groove, a self-rotating cylinder is provided in the mounting groove, the mounting hole is formed inside the self-rotating cylinder, the guide groove is provided on the side of the self-rotating cylinder, a rotating bearing is provided between the outer side of the self-rotating cylinder and the inner side of the mounting groove, a rotating gear is sleeved on the outer side of the self-rotating cylinder, and the coil spring driving unit includes a self-rotating motor, and the output shaft of the self-rotating motor is meshed with the rotating gear through a gear. The self-rotating motor drives the self-rotating cylinder to rotate at high speed through the rotating gear, at which time the quick-cut nozzle is located in the self-rotating cylinder and also rotates at high speed, and the high-density mass block slides along the guide groove under the action of centrifugal force, thereby tightening the coil spring.

[0012] Furthermore, the coil spring driving unit is a traction cylinder, the traction cylinder is located in the guide groove, and the output shaft of the traction cylinder is connected to the end of the tension strip. The contraction and extension of the traction cylinder can directly pull the coil spring tube structure of the quick-cut nozzle to tighten and relax.

[0013] Furthermore, the coil spring driving unit is an electromagnet, on which a conductive winding is wound, and a tightening magnet is fixed at the end of the tension strip. After the conductive winding is energized, the electromagnet generates a magnetic field, which attracts the tightening magnet to tighten the coil spring, causing the quick-cut lower nozzle to shrink. After the conductive winding is short-circuited, the electromagnet loses its magnetic field, and the diameter of the quick-cut lower nozzle increases, so that the quick-cut lower nozzle is closely attached to the inner side of the fixed upper nozzle.

[0014] Furthermore, an annular convex plate is fixed at the bottom of the mounting hole, a positioning pin is fixed on the inner side of the convex plate, a positioning slot is provided at the bottom of the outer loose end of the quick-cut lower nozzle, and the positioning pin is embedded in the positioning slot. The annular convex plate plays a role in supporting and fixing the quick-cut lower nozzle, and the positioning pin cooperates with the positioning slot to fix the inner fixed end.

[0015] Furthermore, the quick-cut lower nozzle includes an upper cylindrical portion and a lower frustum portion, the mounting hole is adapted to the shape of the lower frustum portion, the upper cylindrical portion is embedded in the fixed upper nozzle, and the tension strip is located at the bottom edge of the upper cylindrical portion.

[0016] Furthermore, the switching mounting plate is a disc structure, and the plurality of quick-cut nozzles are circumferentially distributed on the switching mounting plate. The switching drive unit includes a vertical moving motor, a vertical moving slide rail, a rotating motor and a rotating shaft. The rotating motor is slidably arranged on the vertical moving slide rail, and the output shaft of the vertical moving motor is connected to the rotating motor, and the rotating shaft is connected to the output shaft of the rotating motor, and the rotating shaft is connected to the center of the switching mounting plate.

[0017] Furthermore, a plurality of the quick-cut nozzles are distributed in an array on the switching mounting plate, and the switching drive unit includes a vertical moving motor, a vertical moving slide rail, a transverse motor, a transverse moving slide rail and a connecting block, the transverse moving slide rail is slidably set on the vertical moving slide rail, the connecting block is slidably set on the transverse moving slide rail, and the output shaft of the transverse motor is connected to the connecting block.

[0018] The combination of the vertical moving motor and the rotating motor or the horizontal moving slide rail cooperates with different quick-cut nozzle distribution modes, so that the quick-cut nozzle can be easily replaced.

[0019] The above technical solution has the following beneficial effects:

[0020] In the present invention, the quick-cut lower nozzle is a coiled spring tube structure. The coiled spring tube can achieve different degrees of tightness under the adjustment of the coiled spring driving unit. After the coiled spring tube is tightened, the size structure of the outer diameter becomes smaller, so that the quick-cut lower nozzle can be embedded in the fixed upper nozzle. Then the coiled spring driving unit controls the coiled spring tube to relax, and the outer diameter of the quick-cut lower nozzle increases, so that the outer side surface of the quick-cut lower nozzle can be tightly attached to the inner wall of the fixed upper nozzle. In conjunction with the switching mounting plate, the switching of different quick-cut lower nozzles can be quickly completed, saving the nozzle replacement time and effectively improving the electrospinning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the electrospinning device described in Example 1;

[0022] Figure 2 This is a structural diagram of the switching drive unit described in Example 1;

[0023] Figure 3 This is a top view of the switch mounting plate described in Example 1;

[0024] Figure 4 This is a structural diagram of the quick-cut nozzle described in Example 1;

[0025] Figure 5 This is a diagram showing the coordination structure of the quick-cut nozzle and the coil spring drive unit described in Example 1;

[0026] Figure 6 This is a structural diagram of the installation slot of the switch installation plate described in Example 1;

[0027] Figure 7 This is a diagram showing the coordination structure of the quick-cut nozzle and the coil spring drive unit described in Example 2;

[0028] Figure 8 This is a diagram showing the coordination structure of the quick-cut nozzle and the coil spring drive unit described in Example 3;

[0029] Fig. 9 This is a structural diagram of the switching drive unit described in Example 4;

[0030] Fig.10 This is a top view of the switching mounting plate described in Example 4.

[0031] Description of reference numerals:

[0032] 1. Fix the upper nozzle;

[0033] 2. Switching mounting plate; 21. Mounting hole; 22. Guide groove; 23. Convex plate; 231. Positioning plug column; 24. Mounting groove; 25. Rotating cylinder; 26. Rotating bearing; 27. Rotating gear;

[0034] 3. Switching drive unit; 31. Vertical moving motor; 32. Vertical moving slide rail; 33. Rotating motor; 34. Rotating shaft; 35. Horizontal motor; 36. Horizontal moving slide rail; 37. Connecting block;

[0035] 4. coil spring drive unit; 41. self-rotating motor; 42. traction cylinder; 43. electromagnet; 44. conductive winding;

[0036] 5. Quick-cut nozzle; 51. Inner fixed end; 511. Positioning slot; 52. Outer elastic end; 53. Tension strip; 54. Upper cylindrical part; 55. Lower frustum part; 56. High-density mass block; 57. Tension magnet;

[0037] 6. Liquid supply unit; 7. High voltage power supply; 8. Collection device. DETAILED DESCRIPTION

[0038] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0039] Example 1

[0040] See also Figure 1-6 The present embodiment discloses an electrospinning device with fast switching of spinning nozzles, comprising a fixed upper nozzle 1, a quick-cut lower nozzle 5, a switching mounting plate 2, and a switching drive unit 3. The switching mounting plate 2 is located below the fixed upper nozzle 1, and a plurality of quick-cut lower nozzles 5 are mounted on the switching mounting plate 2. The switching drive unit 3 is used to drive the position of the quick-cut lower nozzle 5 on the switching mounting plate 2 to correspond to the position of the fixed upper nozzle 1, and to make the quick-cut lower nozzle 5 embedded in the inner side of the fixed upper nozzle 1 from bottom to top.

[0041] The quick-cut nozzle 5 is a coil spring tube structure, and a plurality of coil spring drive units 4 are provided on the switching mounting plate 2. The quick-cut nozzle 5 corresponds to the coil spring drive unit 4 one by one, and the coil spring drive unit 4 is used to adjust the tightness of the quick-cut nozzle 5 to adjust the size of the outer diameter of the quick-cut nozzle 5.

[0042] In this embodiment, when the electrospinning device is used, it also includes a liquid supply unit 6, a high-voltage power supply 7 and a collecting device 8. The fixed upper nozzle 1 is connected to the liquid supply unit 6, and the high-voltage power supply 7 is connected to the fixed upper nozzle 1 to provide a high voltage for the electrospinning solution. The collecting device 8 is located on the switching mounting plate 2 and is used to receive the finished electrospinning product.

[0043] The switching mounting plate 2 is a disc structure, and the plurality of quick-cut nozzles 5 are circumferentially distributed on the switching mounting plate 2. The switching drive unit 3 includes a vertical moving motor 31, a vertical moving slide rail 32, a rotating motor 33 and a rotating shaft 34. The rotating motor 33 is slidably arranged on the vertical moving slide rail 32. The output shaft of the vertical moving motor 31 is connected to the rotating motor 33. The rotating shaft 34 is connected to the output shaft of the rotating motor 33. The rotating shaft is connected to the center of the switching mounting plate 2.

[0044] A mounting hole 21 is provided on the switching mounting plate 2, and the quick-cut lower nozzle 5 is fixed in the mounting hole 21. The coil spring tube structure of the quick-cut lower nozzle 5 includes an inner fixed end 51 and an outer elastic end 52. The inner fixed end 51 is fixed to the bottom edge of the mounting hole 21, and the outer elastic end 52 is connected with a tensioning strip 53. A guide groove 22 is provided on the side of the mounting hole 21 on the switching mounting plate 2, and the guide groove 22 corresponds to the position of the tensioning strip 53. The tensioning strip 53 extends into the guide groove 22. The coil spring driving unit 4 drives the tensioning strip 53 to slide in the guide groove 22 to adjust the tightness of the quick-cut lower nozzle 5.

[0045] The inner side of the coil spring barrel is a fixed end. When the outer side is tightened, the coil spring barrel tends to tighten due to the fixation of the inner side, thereby reducing the outer diameter, thereby facilitating the quick cutting of the lower nozzle 5 and quickly embedding it into the fixed upper nozzle 1.

[0046] An annular convex plate 23 is fixed to the bottom of the mounting hole 21, a positioning pin 231 is fixed to the inner side of the convex plate 23, a positioning slot 511 is provided at the bottom of the outer loose end 52 of the quick-cut lower nozzle 5, and the positioning pin 231 is embedded in the positioning slot 511. The annular convex plate 23 plays a role in supporting and fixing the quick-cut lower nozzle 5, and the positioning pin 231 cooperates with the positioning slot 511 to fix the inner fixed end 51.

[0047] The quick-cut lower nozzle 5 includes an upper cylindrical portion 54 and a lower frustum portion 55 , the mounting hole 21 is adapted to the shape of the lower frustum portion 55 , the upper cylindrical portion 54 is embedded in the fixed upper nozzle 1 , and the tension strip 53 is located at the bottom edge of the upper cylindrical portion 54 .

[0048] A high-density mass block 56 is provided at the end of the tension strip 53. The coil spring driving unit 4 is used to drive the quick-cut lower nozzle 5 to rotate. The high-density mass block 56 tightens the tension strip 53 under the action of centrifugal force, thereby changing the outer diameter of the quick-cut lower nozzle 5. When the quick-cut lower nozzle 5 rotates at high speed, the high-density mass block 56 moves away from the center of the circle along the guide groove 22, tightens the coil spring, and thus reduces the nozzle diameter.

[0049] like Figure 4 In this embodiment, when the coil spring driving unit 4 does not apply external force, the outer diameter of the quick-cut nozzle 5 is the largest, and the portion of the tension strip 53 close to the quick-cut nozzle 5 is bent for a distance.

[0050] The switching mounting plate 2 is provided with a mounting groove 24, a self-rotating cylinder 25 is provided in the mounting groove 24, the mounting hole 21 is formed inside the self-rotating cylinder 25, the guide groove 22 is provided on the side of the self-rotating cylinder 25, a rotating shaft 34 bearing 26 is provided between the outer side of the self-rotating cylinder 25 and the inner side of the mounting groove 24, a rotating gear 27 is sleeved on the outer side of the self-rotating cylinder 25, and the coil spring driving unit 4 includes a self-rotating motor 41, the output shaft of the self-rotating motor 41 is meshed with the rotating gear 27 through gears. The self-rotating motor 41 drives the self-rotating cylinder 25 to rotate at a high speed through the rotating gear 27, at which time the quick-cut nozzle 5 is located in the self-rotating cylinder 25, and also rotates at a high speed, and the high-density mass block 56 slides along the guide groove 22 under the action of centrifugal force, thereby tightening the coil spring.

[0051] In this embodiment, two rotating shafts 34 bearings 26 are provided on the outer side of the rotating cylinder 25, the outer ring sleeve of the rotating shaft 34 bearing 26 is fixed to the switching mounting plate 2, the inner ring sleeve of the rotating shaft 34 bearing 26 is fixed to the rotating cylinder 25, the rotating gear 27 is located between the two rotating shafts 34 bearings 26, the rotating motor 41 is fixed to the bottom surface of the switching mounting plate 2, the output shaft of the rotating motor 41 extends upward, and a gear is set on the output shaft of the rotating motor 41 to mesh with the rotating gear 27.

[0052] In this embodiment, the diameters of multiple quick-cut nozzles 5 can be set to be the same or different. When nozzles of different diameters are set, the electrospinning device can not only quickly switch to a new quick-cut nozzle 5, but also produce spinning fibers of different diameters.

[0053] In this embodiment, a single fixed upper nozzle 1 is used for spinning.

[0054] In another embodiment of the present invention, a plurality of fixed upper nozzles 1 are provided, and a plurality of quick-cut lower nozzles 5 are arranged in groups, and the number of quick-cut lower nozzles 5 in each group can correspond to the plurality of fixed upper nozzles 1, so that electrostatic spinning of a plurality of nozzles can be performed simultaneously when in use.

[0055] Example 2

[0056] See also Figure 7 This embodiment discloses an electrospinning device with a fast-switching spinning nozzle, which is different from the first embodiment in that the coil spring driving unit is a traction cylinder 42, which is located in the guide groove 22, and the output shaft of the traction cylinder 42 is connected to the end of the tension strip 53. The contraction and extension of the traction cylinder 42 can directly pull the coil spring tube structure of the fast-cut nozzle 5 to tighten and relax.

[0057] Example 3

[0058] See also Figure 8 This embodiment discloses an electrospinning device with a fast-switching spinning nozzle. The difference from the first embodiment is that the coil spring driving unit is an electromagnet 43, on which a conductive winding 44 is wound, and a tightening magnet 57 is fixed to the end of the tensioning strip 53. After the conductive winding 44 is energized, the electromagnet 43 generates a magnetic field, which attracts the tightening magnet 57 to coil the spring of the tensioning strip 53, so that the quick-cut lower nozzle 5 contracts. After the conductive winding 44 is short-circuited, the electromagnet 43 loses the magnetic field, and the diameter of the quick-cut lower nozzle 5 increases, so that the quick-cut lower nozzle 5 is closely attached to the inner side of the fixed upper nozzle 1.

[0059] In this embodiment, the tightening degree of the coil spring can be controlled by controlling the magnitude of the current flowing through the conductive winding 44 .

[0060] Example 4

[0061] See also Figure 9-10 This embodiment discloses an electrospinning device with fast switching of spinning nozzles. The difference from Embodiment 1 is that a plurality of the fast-cut nozzles 5 are distributed in an array on the switching mounting plate 2, and the switching drive unit includes a vertical moving motor 31, a vertical moving slide rail 32, a transverse motor 35, a transverse moving slide rail 36 and a connecting block 37. The transverse moving slide rail 36 is slidably arranged on the vertical moving slide rail 32, and the connecting block 37 is slidably arranged on the transverse moving slide rail 36. The output shaft of the transverse motor 35 is connected to the connecting block 37.

[0062] The combination of the vertical moving motor 31 and the rotating motor 33 or the horizontal moving slide rail 36 cooperates with different distribution modes of the quick-cut lower nozzles 5, so as to facilitate the replacement of the quick-cut lower nozzles 5.

[0063] Taking Example 1 as an example, the use process of the present invention is as follows:

[0064] In the initial state, the fixed upper nozzle 1 cooperates with a quick-cut lower nozzle 5;

[0065] When the quick-cut lower nozzle 5 is blocked or needs to be replaced with a quick-cut lower nozzle 5 of a different inner diameter, the vertical moving motor 31 drives the switching mounting plate 2 to move downward, the quick-cut lower nozzle 5 is separated from the fixed upper nozzle 1, and the rotating motor 33 rotates, and the new quick-cut lower nozzle 5 on the switching mounting plate 2 rotates to below the fixed upper nozzle 1;

[0066] The rotation motor 41 works, so that the quick-cut nozzle 5 rotates at high speed, and the high-density mass block 56 moves away from the center of the circle along the guide groove 22, tightening the coil spring, thereby reducing the outer diameter of the quick-cut nozzle 5;

[0067] The vertical moving motor 31 drives the switching mounting plate 2 to move upward, and the quick-cut lower nozzle 5 is embedded in the fixed upper nozzle 1;

[0068] The rotating motor 41 stops working, and the quick-cut lower nozzle 5 recovers its original diameter, so that the outer diameter of the quick-cut lower nozzle 5 is closely attached to the inner side surface of the fixed upper nozzle 1, and the electrostatic spinning continues.

[0069] In the present invention, the quick-cut lower nozzle 5 is a coiled spring tube structure. The coiled spring tube can achieve different degrees of tightness under the adjustment of the coiled spring drive unit 4. After the coiled spring tube is tightened, the size structure of the outer diameter becomes smaller, so that the quick-cut lower nozzle 5 can be embedded in the fixed upper nozzle 1. Then the coiled spring drive unit 4 controls the coiled spring tube to relax, and the outer diameter of the quick-cut lower nozzle 5 increases, so that the outer side surface of the quick-cut lower nozzle 5 can be tightly attached to the inner wall of the fixed upper nozzle 1. In conjunction with the switching mounting plate 2, the switching of different quick-cut lower nozzles 5 can be quickly completed, saving the nozzle replacement time and effectively improving the electrospinning efficiency.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article or terminal device including the elements. In addition, in this article, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself.

[0071] Although the above embodiments have been described, once those skilled in the art know the basic creative concepts, they can make additional changes and modifications to these embodiments. Therefore, the above description is only an embodiment of the present invention and does not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electrospinning device with fast switching of spinning nozzles, characterized in that: It includes a fixed upper nozzle, a quick-cut lower nozzle, a switching mounting plate, and a switching drive unit. The switching mounting plate is located below the fixed upper nozzle. A plurality of quick-cut lower nozzles are mounted on the switching mounting plate. The switching drive unit is used to drive the position of the quick-cut lower nozzle on the switching mounting plate to correspond to the position of the fixed upper nozzle, and to make the quick-cut lower nozzle embedded in the inner side of the fixed upper nozzle from bottom to top. The quick-cut lower nozzle is a coil spring tube structure. A plurality of coil spring drive units are arranged on the switching mounting plate. The quick-cut lower nozzle corresponds to the coil spring drive unit one by one. The coil spring drive unit is used to adjust the tightness of the quick-cut lower nozzle to adjust the size of the outer diameter of the quick-cut lower nozzle. The switch mounting plate is provided with a mounting hole, the quick-cut lower nozzle is fixed in the mounting hole, the coil spring tube structure of the quick-cut lower nozzle comprises an inner fixed end and an outer elastic end, the inner fixed end is fixed to the bottom edge of the mounting hole, the outer elastic end is connected with a tension strip, a guide groove is provided on the side of the mounting hole of the switch mounting plate, the guide groove corresponds to the position of the tension strip, the tension strip extends into the guide groove, and the coil spring driving unit drives the tension strip to slide in the guide groove to adjust the tightness of the quick-cut lower nozzle; A high-density mass block is provided at the end of the tension strip, and the coil spring driving unit is used to drive the quick-cut nozzle to rotate. The high-density mass block tightens the tension strip under the action of centrifugal force, thereby changing the outer diameter of the quick-cut nozzle; The switching mounting plate is provided with a mounting groove, a rotating cylinder is provided in the mounting groove, the mounting hole is formed inside the rotating cylinder, the guide groove is arranged on the side surface of the rotating cylinder, a rotating bearing is arranged between the outer side surface of the rotating cylinder and the inner side surface of the mounting groove, a rotating gear is sleeved on the outer side surface of the rotating cylinder, and the coil spring driving unit includes a rotating motor, and the output shaft of the rotating motor is meshed with the rotating gear through a gear.

2. The electrospinning device with fast spinning nozzle switching according to claim 1, characterized in that: The coil spring driving unit is a traction cylinder, the traction cylinder is located in the guide groove, and the output shaft of the traction cylinder is connected to the end of the tension strip.

3. The electrospinning device with fast spinning nozzle switching according to claim 1, characterized in that: The coil spring driving unit is an electromagnet, on which a conductive winding is wound, and a tensioning magnet is fixed to the end of the tensioning strip.

4. The electrospinning device with fast spinning nozzle switching according to claim 1, characterized in that: An annular convex plate is fixed at the bottom of the mounting hole, a positioning column is fixed on the inner side of the convex plate, a positioning slot is provided at the bottom edge of the outer elastic end of the quick-cut nozzle, and the positioning column is embedded in the positioning slot.

5. The electrospinning device with fast spinning nozzle switching according to claim 1, characterized in that: The quick-cut lower nozzle comprises an upper cylindrical portion and a lower frustum portion, the mounting hole is adapted to the shape of the lower frustum portion, the upper cylindrical portion is embedded in the fixed upper nozzle, and the tension strip is located at the bottom edge of the upper cylindrical portion.

6. The electrospinning device with fast spinning nozzle switching according to claim 1, characterized in that: The switching mounting plate is a disc structure, and the plurality of quick-cut nozzles are circumferentially distributed on the switching mounting plate. The switching drive unit includes a vertical moving motor, a vertical moving slide rail, a rotating motor and a rotating shaft. The rotating motor is slidably arranged on the vertical moving slide rail, and the output shaft of the vertical moving motor is connected to the rotating motor, and the rotating shaft is connected to the output shaft of the rotating motor, and the rotating shaft is connected to the center of the switching mounting plate.

7. The electrospinning device with fast spinning nozzle switching according to claim 1, characterized in that: The plurality of quick-cut nozzles are distributed in an array on the switching mounting plate, and the switching drive unit includes a vertical moving motor, a vertical moving slide rail, a transverse motor, a transverse moving slide rail and a connecting block, the transverse moving slide rail is slidably arranged on the vertical moving slide rail, the connecting block is slidably arranged on the transverse moving slide rail, and the output shaft of the transverse motor is connected to the connecting block.

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