Spray head device for electrostatic spinning machine

Abstract

The utility model provides a spray head device for an electrostatic spinning machine. The spray head device comprises an injector, a second fixing structure, a coaxial injection structure, a needle head and two first fixing structures. The end part of the injector is connected with the needle head and the coaxial injection structure, the needle head and the coaxial injection structure are coaxially arranged, and the injector is detachably connected with the coaxial injection structure; the two first fixing structures are symmetrically arranged at the bottom of the injector, the second fixing structure is arranged between the two first fixing structures, and the second fixing structure is used for fixing the upper portion of the injector. According to the spray head device for the electrostatic spinning machine, the problem that in the prior art, in a spray head device of an electrostatic spinning machine, the flow speed of a solution is unstable is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrostatic spinning, in particular to a nozzle device for an electrostatic spinning machine. Background Art

[0002] The nozzle device of the electrospinning machine is one of the core parts of the electrospinning machine, and is mainly used to spin polymer solutions or melts into nanofibers through the action of an electric field. The nozzle device is usually composed of components such as a syringe and a nozzle (needle). Common nozzle types include single-needle nozzles and multi-needle nozzles. Single-needle nozzles are suitable for small-scale experiments and the preparation of fine fibers, while multi-needle nozzles are used for large-scale production. If the syringe shakes or shifts in position during the spinning process, it will cause the solution flow rate to be unstable, resulting in inconsistent diameters of the ejected fibers. Since the fixing stability of the syringe in the nozzle device of the electrospinning machine in the related art is poor, if the syringe shakes or shifts in position during the spinning process, it will cause the solution flow rate to be unstable, resulting in inconsistent diameters of the ejected fibers. In addition, the coaxial nozzle device of the electrospinning device in the related art may face problems of insufficient coaxiality and poor internal sealing during use. Summary of the Invention

[0003] In view of this, the present invention aims to solve one of the related technical problems at least to a certain extent.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A nozzle device for an electrospinning machine, comprising a syringe, a second fixing structure, a coaxial injection structure, a needle and two first fixing structures;

[0006] The end of the syringe is connected to the needle and the coaxial injection structure, the needle and the coaxial injection structure are coaxially arranged, and the syringe and the coaxial injection structure are detachably connected;

[0007] The two first fixing structures are symmetrically arranged at the bottom of the syringe, and the second fixing structure is arranged between the two first fixing structures, and the second fixing structure is used to fix the upper part of the syringe;

[0008] The first fixing structure includes a positioning buckle, a first fixing plate, an anti-slip plate, two buffer devices and multiple anti-slip rubber strips. The positioning buckle is arranged on the outer wall of the syringe needle tube. An arc-shaped groove is provided on the inner side of the first fixing plate. The outer wall of the first fixing plate can cooperate with the slot of the micro pump fixing platform. The positioning buckle is connected to the arc-shaped groove through the two buffer devices. The two buffer devices are symmetrically arranged front and back. The anti-slip plate is arranged at the bottom of the first fixing plate. The multiple anti-slip rubber strips are symmetrically arranged on the front and back sides of the outer wall of the first fixing plate.

[0009] Furthermore, the buffer device is a buffer spring.

[0010] Furthermore, the front and rear ends of the first fixing plate are both provided with ribs.

[0011] Furthermore, the second fixing structure includes a second fixing plate and two locking bolts. A positioning slot capable of cooperating with the syringe needle is provided in the middle of the second fixing plate. Strip holes are provided at the front and rear ends of the second fixing plate, and a locking bolt is correspondingly arranged in each of the strip holes.

[0012] Furthermore, the coaxial injection structure includes an external sleeve, a sealing structure, a side branch pipe, a nozzle, a needle tube positioning disk, a connecting sleeve and a connecting end cover. The connecting sleeve is connected to the end of the syringe needle, and the connecting end cover is threadedly connected to the connecting sleeve. The needle passes through the sealing structure, the needle tube positioning disk and the nozzle in sequence. The external sleeve is arranged on the outside of the sealing structure and the needle tube positioning disk. The needle tube positioning disk is detachably connected to the preset step surface on the inner wall of the external sleeve. The side branch pipe is connected to the sealing structure inside the external sleeve and the needle tube positioning disk. A discharge gap is provided between the needle tube positioning disk and the needle, and between the nozzle and the needle.

[0013] Furthermore, the sealing structure includes a boss structure, a compression spring and a sealing disk. The boss structure is arranged on the outer end surface of the connecting end cover, and the boss structure is threadedly connected to the external sleeve. One end of the compression spring presses against the boss structure, and the other end of the compression spring presses against the sealing disk. The sealing disk is used to block the material in the side branch pipe.

[0014] Compared with the prior art, the nozzle device for an electrospinning machine described in the present invention has the following advantages:

[0015] 1. The positioning buckle in the first fixed structure fits tightly with the outer wall of the syringe needle, ensuring the accurate positioning of the syringe on the fixed plate, thereby improving the coaxiality and ensuring the stability of the nozzle during the spinning process. Two buffer devices (such as buffer springs) act as buffers between the syringe needle and the arc-shaped groove, which can effectively reduce the impact of equipment vibration on the syringe and avoid nozzle position deviation caused by vibration, thereby ensuring the stability of spinning and the uniformity of fiber quality. The use of anti-slip plates and anti-slip rubber strips increases the friction of the syringe in the fixed structure, preventing it from sliding or moving during the spinning process, further improving the stability of the equipment.

[0016] 2. The second fixing structure secures the upper portion of the syringe via a second fixing plate and two locking bolts, providing additional support and securing force, further enhancing the stability of the overall structure. Strip holes in the second fixing plate allow the locking bolts to be adjusted within a certain range to accommodate syringes of varying sizes or different spinning requirements. This adjustability enhances the flexibility and adaptability of the device.

[0017] 3. The coaxial injection structure ensures that all components remain aligned during the spinning process by arranging the needle, outer sleeve, and needle positioning plate coaxially. This significantly improves the stability of the liquid flow during the spinning process and reduces the occurrence of uneven fiber diameters or fiber breakage caused by axis deviation. Because the coaxial injection structure includes multiple coaxial components, especially the outer sleeve and side branch design, it can achieve co-injection of multiple materials. This is particularly advantageous for producing multi-layer or functional nanofibers, allowing the preparation of composite materials in a single spinning process, expanding the product's application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of a nozzle device for an electrospinning machine according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the first fixing structure according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the buffer spring according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the side branch pipe structure according to an embodiment of the present utility model;

[0023] Figure 5This is a schematic diagram of the coaxial injection structure described in an embodiment of the present utility model.

[0024] Description of reference numerals:

[0025] 101. Syringe; 201. Second fixing plate; 202. Locking bolt; 301. First fixing plate; 302. Anti-slip rubber strip; 303. Anti-slip plate; 304. Buffer spring; 305. Positioning buckle; 401. Connecting end cap; 402. Side branch pipe; 403. Boss structure; 501. Nozzle; 601. Compression spring; 602. Sealing disk; 603. Needle positioning disk. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] A nozzle device for an electrospinning machine, such as Figure 1As shown, it includes a syringe 101, a second fixing structure, a coaxial injection structure, a needle and two first fixing structures; the end of the syringe 101 is connected to the needle and the coaxial injection structure, the needle and the coaxial injection structure are arranged coaxially, and the syringe 101 and the coaxial injection structure are detachably connected; the two first fixing structures are symmetrically arranged at the bottom of the syringe 101, and the second fixing structure is arranged between the two first fixing structures, and the second fixing structure is used to fix the upper part of the syringe 101;

[0031] The first fixing structure includes a positioning clip 305, a first fixing plate 301, an anti-slip plate 303, two buffer devices, and multiple anti-slip rubber strips 302. The positioning clip 305 is positioned on the outer wall of the syringe 101 needle tube. The first fixing plate 301 has an arc-shaped groove on its inner side. The outer wall of the first fixing plate 301 can mate with the slot of the micropump fixing platform. The positioning clip 305 is connected to the arc-shaped groove via two buffer devices, which are symmetrically arranged front and back. The anti-slip plate 303 is positioned at the bottom of the first fixing plate 301, and multiple anti-slip rubber strips 302 are symmetrically arranged on the front and back sides of the outer wall of the first fixing plate 301. The positioning clip 305 in the first fixing structure tightly mates with the outer wall of the syringe 101 needle tube, ensuring the accurate positioning of the syringe 101 on the fixing plate, thereby improving coaxiality and ensuring the stability of the nozzle during the spinning process. Two buffer devices (such as buffer springs 304) act as buffers between the syringe 101 needle tube and the arc-shaped groove, which can effectively reduce the impact of equipment vibration on the syringe 101 and avoid the position deviation of the nozzle due to vibration, thereby ensuring the stability of spinning and the uniformity of fiber quality. The application of the anti-slip plate 303 and the anti-slip rubber strip 302 increases the friction of the syringe 101 in the fixed structure, preventing it from sliding or moving during the spinning process, and further improving the stability of the equipment. In this embodiment, the buffer device is two buffer springs 304 arranged symmetrically on the left and right. The front and rear ends of the first fixed plate 301 are both provided with ribs.

[0032] The second fixing structure includes a second fixing plate 201 and two locking bolts 202. A positioning slot capable of cooperating with the syringe 101 needle tube is provided in the middle of the second fixing plate 201. The front and rear ends of the second fixing plate 201 are provided with strip holes, and a locking bolt 202 is correspondingly arranged in each strip hole. The second fixing structure fixes the upper portion of the syringe 101 through the second fixing plate 201 and the two locking bolts 202, providing additional support and fixing force, further improving the stability of the overall structure. The second fixing plate 201 is provided with strip holes, which allow the locking bolts 202 to be adjusted within a certain range to accommodate syringes 101 of different specifications or different spinning requirements. This adjustability enhances the flexibility and applicability of the device.

[0033] The coaxial injection structure includes an external sleeve, a blocking structure, a side branch 402, a nozzle 501, a needle positioning disk 603, a connecting sleeve, and a connecting end cap 401. The connecting sleeve is connected to the end of the syringe 101 needle, and the connecting end cap 401 is threadedly connected to the connecting sleeve. The needle passes through the blocking structure, the needle positioning disk 603, and the nozzle 501 in sequence. The external sleeve is arranged outside the blocking structure and the needle positioning disk 603. The needle positioning disk 603 is detachably connected to a preset step surface on the inner wall of the external sleeve. The side branch 402 is connected to the blocking structure inside the external sleeve and the needle positioning disk 603. A discharge gap is provided between the needle positioning disk 603 and the needle, and between the nozzle 501 and the needle. The coaxial injection structure ensures that the components, such as the needle, external sleeve, and the needle positioning disk 603, remain aligned during the spinning process by arranging them coaxially. This significantly improves the stability of the liquid flow during the spinning process, reducing uneven fiber diameters and fiber breakage caused by axis deviation. Because the coaxial injection structure comprises multiple coaxial components, particularly the design of the outer sleeve and side branch 402, it enables co-injection of multiple materials. This is particularly advantageous for producing multi-layered or functional nanofibers, enabling the preparation of composite materials in a single spinning process, expanding the product's application range.

[0034] The sealing structure includes a boss structure 403, a compression spring 601 and a sealing disk 602. The boss structure 403 is arranged on the outer end face of the connecting end cover 401. The boss structure 403 is threadedly connected to the external sleeve. One end of the compression spring 601 is against the boss structure 403, and the other end of the compression spring 601 is against the sealing disk 602. The sealing disk 602 is used to block the material in the side branch pipe 402.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A nozzle device for an electrospinning machine, characterized in that: It comprises a syringe (101), a second fixing structure, a coaxial injection structure, a needle and two first fixing structures; The end of the syringe (101) is connected to the needle and the coaxial injection structure, the needle and the coaxial injection structure are coaxially arranged, and the syringe (101) and the coaxial injection structure are detachably connected; Two first fixing structures are symmetrically arranged at the bottom of the syringe (101), and the second fixing structure is arranged between the two first fixing structures, and the second fixing structure is used to fix the upper part of the syringe (101); The first fixing structure includes a positioning buckle (305), a first fixing plate (301), an anti-slip plate (303), two buffer devices and a plurality of anti-slip rubber strips (302), wherein the positioning buckle (305) is arranged on the outer wall of the needle tube of the syringe (101), an arc-shaped groove is provided on the inner side of the first fixing plate (301), and the outer wall of the first fixing plate (301) can cooperate with the slot of the micro pump fixing platform, the positioning buckle (305) is connected to the arc-shaped groove through the two buffer devices, and the two buffer devices are symmetrically arranged front and back, the anti-slip plate (303) is arranged at the bottom of the first fixing plate (301), and the plurality of anti-slip rubber strips (302) are symmetrically arranged on the front and back sides of the outer wall of the first fixing plate (301).

2. A nozzle device for an electrospinning machine according to claim 1, characterized in that: The buffer device is a buffer spring (304).

3. The nozzle device for an electrospinning machine according to claim 1, characterized in that: The front and rear ends of the first fixing plate (301) are both provided with ribs.

4. A nozzle device for an electrospinning machine according to any one of claims 1 to 3, characterized in that: The second fixing structure includes a second fixing plate (201) and two locking bolts (202). A positioning slot capable of cooperating with the needle tube of the syringe (101) is provided in the middle of the second fixing plate (201). Strip holes are provided at the front and rear ends of the second fixing plate (201), and one locking bolt (202) is correspondingly provided in each of the strip holes.

5. The nozzle device for an electrospinning machine according to claim 4, characterized in that: The coaxial injection structure includes an external sleeve, a blocking structure, a side branch pipe (402), a nozzle (501), a needle tube positioning disk (603), a connecting sleeve and a connecting end cover (401), wherein the connecting sleeve is connected to the end of the needle tube of the syringe (101), and the connecting end cover (401) is threadedly connected to the connecting sleeve. The needle passes through the blocking structure, the needle tube positioning disk (603) and the nozzle (501) in sequence. The external sleeve is arranged on the outside of the blocking structure and the needle tube positioning disk (603), and the needle tube positioning disk (603) is detachably connected to the preset step surface on the inner wall of the external sleeve. The side branch pipe (402) is connected to the blocking structure inside the external sleeve and the needle tube positioning disk (603), and a discharge gap is provided between the needle tube positioning disk (603) and the needle, and between the nozzle (501) and the needle.

6. The nozzle device for an electrospinning machine according to claim 5, characterized in that: The sealing structure includes a boss structure (403), a compression spring (601) and a sealing disk (602), wherein the boss structure (403) is arranged on the outer end surface of the connecting end cover (401), the boss structure (403) is threadedly connected to the external sleeve, one end of the compression spring (601) abuts against the boss structure (403), and the other end of the compression spring (601) abuts against the sealing disk (602), and the sealing disk (602) is used to block the material in the side branch pipe (402).

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