Solution jet spinning device

Abstract

The utility model relates to a solution jet spinning device which comprises a shell, a pressure stabilizing cavity is formed in the shell, a partition plate divides the pressure stabilizing cavity into a first pressure stabilizing cavity and a second pressure stabilizing cavity, positioning holes are formed in the partition plate, first air holes are formed in the two sides of the partition plate, one end of each first air hole is communicated with the first pressure stabilizing cavity, and the other end of each first air hole is communicated with the second pressure stabilizing cavity. A through hole corresponding to the positioning hole is formed in the bottom end of the second pressure stabilizing cavity; the positioning sleeve is mounted on the inner side of the positioning hole; the spray needle is installed on the inner side of the positioning sleeve, the spray needle penetrates through the through hole and protrudes out of the outer side wall of the shell, and the diameter of the spray needle is smaller than the inner diameter of the through hole. Due to the arrangement of the positioning sleeve, the stability of the spray needle in the using process is improved, the spray needle is prevented from shaking, and the spinning quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of solution electrospinning, in particular to a solution electrospinning device. Background Art

[0002] Solution electrospinning is an effective technique for preparing nanofibers or micro-nano fibers. It sprays a polymer solution at high speed through a nozzle and then rapidly solidifies it in the air or a specific coagulation bath to form fibers.

[0003] The current solution electrospinning device has the following problems during use: First, multiple air nozzles are directly connected to the air outlet end of the air supply device, lacking a gas pressure stabilizing structure, and the air pressure fluctuation will affect the spinning quality; Second, the spraying process of the needle and the spraying process of high-pressure air are carried out simultaneously, and the needle lacks a positioning structure. During the spraying process, the movement of the needle will affect the spinning quality; Third, the needle is integrally connected to the device. When it is necessary to replace the needle to produce different specifications of spun fibers, the replacement of the needle is not convenient, which reduces the work quality. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a solution electrospinning device in order to solve at least one of the above partial technical problems.

[0005] A solution electrospinning device provided by the utility model includes:

[0006] A housing, a pressure stabilizing cavity is arranged inside the housing, a partition plate divides the pressure stabilizing cavity into a first pressure stabilizing cavity and a second pressure stabilizing cavity, a positioning hole is arranged on the partition plate, first air holes are arranged on both sides of the partition plate, one end of the first air hole is communicated with the first pressure stabilizing cavity, the other end is communicated with the second pressure stabilizing cavity, and a through hole corresponding to the positioning hole is opened at the bottom end of the second pressure stabilizing cavity;

[0007] A positioning sleeve, which is installed inside the positioning hole;

[0008] A needle, which is installed inside the positioning sleeve, the needle penetrates through the through hole and protrudes out of the outer side wall of the housing, and the diameter of the needle is smaller than the inner diameter of the through hole.

[0009] Further, an air inlet pipe communicated with the first pressure stabilizing cavity is arranged on the housing, and the air inlet pipe is communicated with the air outlet end of the high-pressure air supply device;

[0010] A plurality of positioning holes are opened on the partition plate, the plurality of positioning holes are uniformly arranged along the length direction of the housing, an inclined surface is arranged at the bottom end of the first pressure stabilizing cavity, the inclined surface is arranged along the length direction of the housing, one end of the inclined surface far from the positioning hole is higher than one end of the inclined surface close to the positioning hole, and the inclined surface corresponds to the position of the air inlet pipe;

[0011] The second pressure stabilizing chamber is located between two inclined surfaces. A plurality of first air vents are formed on both sides of the partition plate, and the plurality of first air vents are uniformly arranged along the length direction of the housing.

[0012] Further, a second air vent communicating with the through hole is formed at the bottom end of the second pressure stabilizing chamber. The diameter of the second air vent is larger than the outer diameter of the positioning sleeve. The second air vent is a circular hole. A plurality of third air vents communicating with the through hole are formed at the bottom end of the second pressure stabilizing chamber. The plurality of third air vents are located outside the second air vent, and the plurality of third air vents are uniformly arranged circumferentially along the second air vent. The second air vent communicates with the upper end of the inverted conical hole, and the lower end of the inverted conical hole communicates with the through hole through a connecting hole. The plurality of third air vents communicate with the upper end of the inverted conical hole;

[0013] The diameter of the upper end of the inverted conical hole is larger than the diameter of the lower end of the inverted conical hole. The diameter of the connecting hole is smaller than the diameter of the lower end of the inverted conical hole. The diameter of the through hole is smaller than the diameter of the connecting hole.

[0014] Further, the positioning sleeve includes a diversion part and a straight pipe part which are connected in sequence from bottom to top. The diameter of the diversion part is smaller than the diameter of the straight pipe part. The outer edge of the straight pipe part adjacent to the diversion part adopts a chamfer structure. The diversion part is located inside the connecting hole, and the chamfer structure of the straight pipe part is located inside the inverted conical hole.

[0015] Further, an installation seat is fixedly arranged at the upper end of the positioning sleeve;

[0016] An installation hole corresponding to the installation seat is formed at the upper end of the housing. A limiting ring is fixedly arranged at the bottom end of the installation hole. The inner diameter of the limiting ring is smaller than the outer diameter of the positioning sleeve. The positioning sleeve penetrates through the limiting ring, and the positioning sleeve is in interference connection with the limiting ring. The installation seat is installed inside the installation hole.

[0017] Further, an annular groove is formed on the outer side wall of the installation seat, and a sealing ring is arranged in the annular groove. The sealing ring is located between the outer wall of the installation seat and the inner side wall of the installation hole.

[0018] Further, the upper end of the injection needle is communicated with the liquid outlet end of the feeding device through a connecting pipe. The connecting pipe includes a positioning part, a square pipe part and a cylindrical part which are connected in sequence from bottom to top. A square groove is formed on the end face of the installation seat far away from the injection needle. A positioning groove is formed at the bottom end of the square groove. The side length of the square groove is smaller than the width of the square pipe part. The square pipe part is installed inside the square groove, and the square pipe part is in interference connection with the installation seat. The positioning part is installed inside the positioning groove.

[0019] Furthermore, the solution electrospinning device further includes a pressing plate, which is detachably connected to the housing. An installation groove corresponding to the pressing plate is formed at the upper end of the housing. The pressing plate is installed inside the installation groove. A square hole matching the square tube part is formed on the pressing plate, and the square tube part is installed inside the square hole.

[0020] Furthermore, fixing holes are formed on the pressing plate, threaded holes are formed at the bottom end of the installation groove, connecting bolts are arranged inside the fixing holes, and the connecting bolts penetrate through the fixing holes and are threadedly connected to the housing.

[0021] Furthermore, the positioning parts of the injection needles and the connecting pipes and the square tube parts are structural parts made of metal materials, and the pressing plate is a structural part made of metal materials.

[0022] Compared with the prior art, the solution distribution device for alumina precursor gel provided by the present utility model has the following improvements:

[0023] By providing the first pressure stabilizing cavity and the second pressure stabilizing cavity, high-pressure gas is evenly ejected from the through holes to blow the liquid material for electrospinning operation, improving the electrospinning quality. Moreover, the setting of the positioning sleeve improves the stability of the injection needles during use, prevents the injection needles from shaking, and ensures the electrospinning quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic three-dimensional structure diagram of the device described in the embodiment of the present invention;

[0026] Figure 2 It is a schematic cross-sectional structure diagram of the device described in the embodiment of the present invention;

[0027] Figure 3 It is the Figure 2 schematic structure diagram of part B in the embodiment of the present invention;

[0028] Figure 4 It is a schematic partial cross-sectional structure diagram of the housing described in the embodiment of the present invention;

[0029] Figure 5 It is the Figure 4 schematic structure diagram of part A in the embodiment of the present invention;

[0030] Figure 6Schematic three-dimensional structure diagram of the pressing plate according to the embodiment of the present invention;

[0031] Figure 7 Schematic three-dimensional structure diagram of the injection needle and the connecting pipe according to the embodiment of the present invention;

[0032] Figure 8 Schematic three-dimensional structure diagram of the positioning sleeve according to the embodiment of the present invention.

[0033] Explanation of reference numerals:

[0034] 1. Housing; 2. Pressing plate; 3. Connecting pipe; 4. Positioning sleeve; 5. Limiting ring; 101. Air inlet pipe; 102. First pressure stabilizing cavity; 103. Partition board; 104. Second pressure stabilizing cavity; 105. Third ventilation hole; 106. Second ventilation hole; 107. Installation groove; 108. Installation hole; 109. Inverted conical hole; 110. Connecting hole; 111. Through hole; 10301. First ventilation hole; 10302. Positioning hole; 201. Square hole; 202. Fixing hole; 301. Positioning part, 302. Square pipe part; 303. Cylindrical part; 304. Injection needle; 401. Flow guiding part; 402. Straight pipe part; 403. Mounting seat; 40301. Annular groove; 40302. Square groove; 40303. Positioning groove. Detailed implementation manners

[0035] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] As Figures 1 to 8 shown, a solution electrospinning device includes: a housing 1, a pressure stabilizing chamber is provided inside the housing 1, a partition 103 divides the pressure stabilizing chamber into a first pressure stabilizing chamber 102 and a second pressure stabilizing chamber 104, a positioning hole 10302 is provided on the partition 103, first air holes 10301 are provided on both sides of the partition 103, one end of the first air hole 10301 communicates with the first pressure stabilizing chamber 102, and the other end communicates with the second pressure stabilizing chamber 104, a through hole 111 corresponding to the positioning hole 10302 is opened at the bottom end of the second pressure stabilizing chamber 104; a positioning sleeve 4 is installed inside the positioning hole 10302; a needle 304 is installed inside the positioning sleeve 4, the needle 304 passes through the through hole 111 and protrudes from the outer wall of the housing 1, and the diameter of the needle 304 is smaller than the inner diameter of the through hole 111. The outer diameter of the needle 304 is smaller than the inner diameter of the positioning sleeve 4, and the needle 304 is interference-fitted inside the positioning sleeve 4, which not only ensures the sealing performance but also facilitates replacement and improves work efficiency.

[0039] An air inlet pipe 101 communicating with the first pressure stabilizing chamber 102 is provided on the housing 1, and the air inlet pipe 101 communicates with the air outlet end of a high-pressure air supply device; four positioning holes 10302 are opened on the partition 103, positioning sleeves 4 are provided in all four positioning holes 10302, needles 304 are provided inside the positioning sleeves, the four positioning holes 10302 are evenly arranged along the length direction of the housing 1, an inclined surface is provided at the bottom end of the first pressure stabilizing chamber 102, the inclined surface is arranged along the length direction of the housing 1, the end of the inclined surface away from the positioning hole 10302 is higher than the end of the inclined surface close to the positioning hole 10302, and the inclined surface corresponds to the position of the air inlet pipe 101; the second pressure stabilizing chamber 104 is located between the two inclined surfaces, and a plurality of first air holes 10301 are opened on both sides of the partition 103, and the plurality of first air holes 10301 are evenly arranged along the length direction of the housing 1.

[0040] The bottom end of the second voltage stabilizing chamber 104 is provided with a second air vent hole 106 communicating with the through hole 111. The diameter of the second air vent hole 106 is larger than the outer diameter of the positioning sleeve 4. The second air vent hole 106 is a circular hole. The bottom end of the second voltage stabilizing chamber 104 is provided with a plurality of third air vent holes 105 communicating with the through hole 111. The plurality of third air vent holes 105 are located outside the second air vent hole 106. The plurality of third air vent holes 105 are arranged circumferentially and uniformly along the second air vent hole 106. The second air vent hole 106 communicates with the upper end of the inverted conical hole 109. The lower end of the inverted conical hole 109 communicates with the through hole 111 through the connecting hole 110. The plurality of third air vent holes 105 communicate with the upper end of the inverted conical hole 109. The diameter of the upper end of the inverted conical hole 109 is larger than the diameter of the lower end of the inverted conical hole 109. The diameter of the connecting hole 110 is smaller than the diameter of the lower end of the inverted conical hole 109. The diameter of the through hole 111 is smaller than the diameter of the connecting hole 110. The positioning sleeve 4 includes a flow guiding portion 401 and a straight pipe portion 402 which are connected in sequence from bottom to top. The diameter of the flow guiding portion 401 is smaller than the diameter of the straight pipe portion 402. The outer edge of the straight pipe portion 402 adjacent to the flow guiding portion 401 adopts a chamfer structure. The flow guiding portion 401 is located inside the connecting hole 110. The chamfer structure of the straight pipe portion 402 is located inside the inverted conical hole 109.

[0041] An installation seat 403 is fixedly arranged at the upper end of the positioning sleeve 4. An installation hole 108 corresponding to the installation seat 403 is opened at the upper end of the housing 1. A limiting ring 5 is fixedly arranged at the bottom end of the installation hole 108. The inner diameter of the limiting ring 5 is smaller than the outer diameter of the positioning sleeve 4. The positioning sleeve 4 penetrates through the limiting ring 5. The positioning sleeve 4 is in interference connection with the limiting ring 5. The installation seat 403 is installed inside the installation hole 108. The housing 1 and the limiting ring 5 are integrally formed by plastic 3D printing. A first sealing surface is formed between the positioning sleeve 4 and the inner side of the limiting ring 5 to prevent high-pressure gas from leaking from the installation hole 108. An annular groove 40301 is opened on the outer wall of the installation seat 403. A sealing ring is arranged in the annular groove 40301. The sealing ring is located between the outer wall of the installation seat 403 and the inner wall of the installation hole 108. The sealing ring is compressed to form a second sealing surface to prevent high-pressure gas from leaking from the installation hole 108.

[0042] The upper end of the injection needle 304 is communicated with the liquid outlet end of the feeding device through the connecting pipe 3. The connecting pipe 3 includes a positioning part 301, a square pipe part 302, and a cylindrical part 303 connected in sequence from bottom to top. A square groove 40302 is formed on the end face of the mounting seat 403 away from the injection needle 304, and a positioning groove 40303 is formed at the bottom end of the square groove 40302. The side length of the square groove 40302 is smaller than the width of the square pipe part 302. The square pipe part 302 is installed inside the square groove 40302, and the square pipe part 302 is in interference connection with the mounting seat 403. The positioning part 301 is installed inside the positioning groove 40303. The solution electrospinning device further includes a pressing plate 2, and the pressing plate 2 is detachably connected to the housing 1. An installation groove 107 corresponding to the pressing plate 2 is formed at the upper end of the housing 1. The pressing plate 2 is installed inside the installation groove 107. A square hole 201 matching the square pipe part 302 is formed on the pressing plate 2, and the square pipe part is installed inside the square hole 201. A fixing hole 202 is formed on the pressing plate 2, and a threaded hole is formed at the bottom end of the installation groove 107. A connecting bolt is provided in the fixing hole 202, and the connecting bolt passes through the fixing hole 202 and is threadedly connected to the housing 1. The pressing plate 2 plays a role in limiting the positioning sleeve 4 and the mounting seat 403 to prevent the mounting seat 403 from falling off from the mounting hole 108. The square pipe part 302 is located inside the square hole 201 and the square groove 40302 to prevent the injection needle 304 and the positioning sleeve 4 from rotating during use, thereby ensuring the stability of the product.

[0043] The injection needle 304, the positioning part 301 of the connecting pipe 3, and the square pipe part 302 are structural parts made of metal materials, and the pressing plate 2 is a structural part made of metal materials. When producing nano-microfibers by electrostatic solution injection, the pressing plate 2 is used as a high-voltage electrostatic connection plate and is electrically connected to the power supply equipment.

[0044] Working process:

[0045] When this solution is implemented, high-pressure gas enters the first pressure stabilizing chamber 102 through the air inlet pipe 101. The position of the air inlet pipe 101 corresponds to the inclined surface, and the inclined surface plays a guiding role for the high-pressure gas, enabling the gas to uniformly enter the second pressure stabilizing chamber 104 through the first air permeation holes 10301. The high-pressure gas in the second pressure stabilizing chamber 104 enters the inverted conical hole 109 through the second air permeation holes 106 and the third air permeation holes 105. The third air permeation holes 105 are evenly arranged in the circumferential direction, and the second air permeation hole 106 is larger than the outer diameter of the positioning sleeve 4, and the chamfer structure of the branch pipe part is located inside the second air permeation hole 106, so that the high-pressure gas in the second pressure stabilizing chamber 104 uniformly enters the inverted conical hole 109. The diameters of the inverted conical hole 109, the connecting hole 110, and the through hole 111 decrease in sequence, and the high-pressure gas is further compressed and uniformly ejected from the through hole 111. The feeding device sprays the liquid material to be spun through the injection needle 304, and the high-pressure gas blows the liquid material to perform the spinning operation.

[0046] Compared with the prior art, by providing the first pressure stabilizing chamber 102 and the second pressure stabilizing chamber 104, high-pressure gas is evenly ejected from the through hole 111 to blow the liquid material for spinning operation, improving the spinning quality. Moreover, the setting of the positioning sleeve 4 improves the stability of the injection needle 304 during use, prevents the injection needle 304 from shaking, and ensures the spinning quality.

[0047] The injection needle 304 and the positioning sleeve 4 are connected by interference fit, which is convenient for quickly replacing injection needles 304 of different models, changing the diameter and aspect ratio of the spinning holes according to the solution requirements, and thus producing different specifications of spun fibers.

[0048] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solution jet spinning device, characterized in that: include: A shell (1), wherein a pressure stabilizing chamber is provided in the shell (1), a partition (103) divides the pressure stabilizing chamber into a first pressure stabilizing chamber (102) and a second pressure stabilizing chamber (104), a positioning hole (10302) is provided on the partition (103), first air holes (10301) are provided on both sides of the partition (103), one end of the first air hole (10301) is connected to the first pressure stabilizing chamber (102), and the other end is connected to the second pressure stabilizing chamber (104), and a through hole (111) corresponding to the positioning hole (10302) is opened at the bottom of the second pressure stabilizing chamber (104); A positioning sleeve (4), wherein the positioning sleeve (4) is installed on the inner side of the positioning hole (10302); A spray needle (304), the spray needle (304) is installed on the inner side of the positioning sleeve (4), the spray needle (304) penetrates the through hole (111) and protrudes out of the outer wall of the shell (1), and the diameter of the spray needle (304) is smaller than the inner diameter of the through hole (111).

2. A solution jet spinning device according to claim 1, characterized in that: The housing (1) is provided with an air inlet pipe (101) connected to the first pressure stabilizing chamber (102), and the air inlet pipe (101) is connected to the air outlet of the high-pressure air supply device; The partition plate (103) is provided with a plurality of positioning holes (10302), the plurality of positioning holes (10302) being evenly arranged along the length direction of the shell (1), the bottom end of the first pressure stabilizing chamber (102) being provided with an inclined surface, the inclined surface being arranged along the length direction of the shell (1), the end of the inclined surface away from the positioning hole (10302) being higher than the end of the inclined surface close to the positioning hole (10302), the inclined surface corresponding to the position of the air inlet pipe (101); The second pressure-stabilizing chamber (104) is located between the two inclined surfaces, and a plurality of first air holes (10301) are provided on both sides of the partition plate (103), and the plurality of first air holes (10301) are evenly arranged along the length direction of the shell (1).

3. A solution jet spinning device according to claim 2, characterized in that: The bottom end of the second pressure-stabilizing chamber (104) is provided with a second air hole (106) connected to the through hole (111); the diameter of the second air hole (106) is larger than the outer diameter of the positioning sleeve (4); the second air hole (106) is a circular hole; the bottom end of the second pressure-stabilizing chamber (104) is provided with a plurality of third air holes (105) connected to the through hole (111); the plurality of third air holes (105) are located outside the second air hole (106); the plurality of third air holes (105) are uniformly arranged along the circumference of the second air hole (106); the second air hole (106) is connected to the upper end of the inverted tapered hole (109); the lower end of the inverted tapered hole (109) is connected to the through hole (111) via the connecting hole (110); the plurality of third air holes (105) are connected to the upper end of the inverted tapered hole (109); The diameter of the upper end of the inverted cone hole (109) is larger than the diameter of the lower end of the inverted cone hole (109), the diameter of the connecting hole (110) is smaller than the diameter of the lower end of the inverted cone hole (109), and the diameter of the through hole (111) is smaller than the diameter of the connecting hole (110).

4. A solution jet spinning device according to claim 3, characterized in that: The positioning sleeve (4) comprises a flow guide portion (401) and a straight tube portion (402) which are connected in sequence from bottom to top; the diameter of the flow guide portion (401) is smaller than the diameter of the straight tube portion (402); the outer edge of the straight tube portion (402) adjacent to the flow guide portion (401) adopts a chamfered structure; the flow guide portion (401) is located on the inner side of the connecting hole (110); and the chamfered structure of the straight tube portion (402) is located on the inner side of the inverted cone hole (109).

5. A solution jet spinning device according to claim 1, characterized in that: A mounting seat (403) is fixedly provided at the upper end of the positioning sleeve (4); The shell (1) has an upper end with a mounting hole (108) corresponding to the mounting seat (403); a limiting ring (5) is fixedly provided at the bottom end of the mounting hole (108); the inner diameter of the limiting ring (5) is smaller than the outer diameter of the positioning sleeve (4); the positioning sleeve (4) passes through the limiting ring (5); the positioning sleeve (4) and the limiting ring (5) are interference-connected; and the mounting seat (403) is mounted on the inner side of the mounting hole (108).

6. A solution jet spinning device according to claim 5, characterized in that: An annular groove (40301) is formed on the outer wall of the mounting seat (403), a sealing ring is provided in the annular groove (40301), and the sealing ring is located between the outer wall of the mounting seat (403) and the inner wall of the mounting hole (108).

7. A solution jet spinning device according to claim 5, characterized in that: The upper end of the spray needle (304) is connected to the liquid outlet end of the feeding device through a connecting pipe (3); the connecting pipe (3) comprises a positioning portion (301), a square tube portion (302), and a cylindrical portion (303) connected in sequence from bottom to top; a square groove (40302) is formed on the end surface of the mounting seat (403) away from the spray needle (304); a positioning groove (40303) is formed at the bottom end of the square groove (40302); the side length of the square groove (40302) is smaller than the width of the square tube portion (302); the square tube portion (302) is mounted on the inner side of the square groove (40302); the square tube portion (302) is interference-connected with the mounting seat (403); and the positioning portion (301) is mounted on the inner side of the positioning groove (40303).

8. A solution jet spinning device according to claim 7, characterized in that: The solution jet spinning device also includes a pressing plate (2), the pressing plate (2) is detachably connected to the shell (1), the upper end of the shell (1) is provided with a mounting groove (107) corresponding to the pressing plate (2), the pressing plate (2) is installed on the inner side of the mounting groove (107), the pressing plate (2) is provided with a square hole (201) matching the square tube part (302), and the square tube part (302) is installed on the inner side of the square hole (201).

9. A solution jet spinning device according to claim 8, characterized in that: The pressure plate (2) is provided with a fixing hole (202), the bottom end of the mounting groove (107) is provided with a threaded hole, a connecting bolt is provided in the fixing hole (202), and the connecting bolt passes through the fixing hole (202) and is threadedly connected to the housing (1).

10. A solution jet spinning device according to claim 8, characterized in that: The spray needle (304), the positioning portion (301) of the connecting tube (3), and the square tube portion (302) are structural parts made of metal materials, and the pressing plate (2) is a structural part made of metal materials.

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