Electrostatic spinning nozzle and spinning assembly

Abstract

The utility model discloses an electrostatic spinning spray head and a spinning assembly, the electrostatic spinning spray head comprises an outer sleeve, a spinning assembly and a spinning assembly, the inner pipe is inserted into the sleeve hole, flow equalizing capillary holes are formed in the inner side of the inner pipe, and the inner pipe is detachably connected with the outer sleeve; the nozzle is arranged on the lower side of the outer sleeve and the lower side of the inner pipe, the nozzle is detachably connected with the outer sleeve, and liquid spraying holes are formed in the nozzle. Due to the fact that the flow equalizing capillary holes with the large length-diameter ratio are formed in the inner pipe, the diameter of the sleeve hole in the outer sleeve can be made to be large, and the machining difficulty and the machining cost of the outer sleeve are reduced. The inner pipe can be a ready-made thin pipe with an inner hole with a small diameter, flow-equalizing capillary holes do not need to be specially machined, when the flow-equalizing capillary holes are blocked and difficult to dredge, only a new inner pipe needs to be replaced, nozzles with liquid spraying holes of different sizes and specifications are convenient to replace, and compared with an existing whole single part, the flow-equalizing capillary holes are convenient to clean. According to the electrostatic spinning nozzle, the machining difficulty and the production cost can be reduced on the whole, and the maintenance cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spinning, in particular to an electrostatic spinning nozzle and a spinning assembly. Background Art

[0002] Electrospinning is a process in which spinning solution is ejected from a nozzle to form filamentous fibers and is deposited into a porous membrane material under the action of an electric field. When multiple nozzles are connected to the liquid storage chamber in a spinneret together, by improving the aspect ratio (ratio of length to diameter) of the jet hole of the nozzle, the flow velocity of the spinning solution in the jet hole can be slowed down and stabilized, so that the flow velocity of the spinning solution of multiple nozzles is substantially the same, thereby making the spinning solution amount of multiple nozzles more uniform. However, the jet hole with a large aspect ratio is processed on the nozzle, and processing difficulty is larger and processing cost is higher, and the jet hole is easily blocked, and it is difficult to dredge and replace the entire nozzle after blocking, and equipment maintenance cost is higher. Utility Model Content

[0003] The main purpose of the utility model is to propose an electrospinning nozzle and a spinneret assembly, aiming to solve the technical problems in the prior art of processing a liquid spray hole with a large aspect ratio on the nozzle, which is difficult to process and has a high processing cost, and the liquid spray hole is easily clogged, and it is difficult to clear the blockage and the entire nozzle needs to be replaced, resulting in high equipment maintenance costs.

[0004] To achieve the above-mentioned purpose, the present invention provides an electrospinning nozzle, comprising:

[0005] An outer shell, wherein the inner side of the outer shell is provided with a sleeve hole, and the sleeve hole is passed through from top to bottom;

[0006] An inner tube, the inner tube being inserted into the sleeve hole, the inner side of the inner tube being provided with flow-equalizing capillary holes, the flow-equalizing capillary holes being passed through vertically, and the inner tube being detachably connected to the outer sleeve;

[0007] The nozzle is arranged on the lower side of the outer sleeve and the inner tube, and the nozzle is detachably connected to the outer sleeve. The nozzle is provided with a liquid spraying hole, which is connected from top to bottom and is directly opposite to the flow-uniform capillary hole.

[0008] The electrospinning nozzle includes an outer shell, an inner tube and a nozzle which are separately arranged. The inner tube is inserted into the sleeve hole of the outer shell. During spinning, the spinning liquid passes through the flow-equalizing capillaries in the inner tube and the spray holes in the nozzle and is sprayed out from the spray holes. The flow-equalizing capillaries in the inner tube can be set with a larger aspect ratio, and the flow rate of the spinning liquid can be slowed down and stabilized when flowing through the flow-equalizing capillaries.

[0009] Since the flow-equalizing capillary holes with a large aspect ratio are arranged in the inner tube, the diameter of the hole in the outer shell can be made larger, reducing the processing difficulty and processing cost of the outer shell, and the inner tube can adopt a ready-made thin tube with a smaller diameter inner hole, without the need to specially process the flow-equalizing capillary holes, and the material and processing costs are low. Moreover, when the flow-equalizing capillary holes are blocked and difficult to clear, only a new inner tube needs to be replaced, and the outer shell does not need to be replaced, which can reduce the maintenance cost of the equipment. In addition, the length of the spray hole of the nozzle can be set shorter, which reduces the processing difficulty and cost, and is easy to clear when blocked. It is also convenient to replace nozzles with spray holes of different sizes according to different needs, so that the whole system can be more adaptable to smaller-sized nozzles, making spinning more stable. By setting up a separate outer shell, inner tube and nozzle, this electrospinning nozzle can reduce the processing difficulty and production cost as a whole compared to the existing single parts, and the maintenance cost is low.

[0010] Preferably, the outer wall of the inner tube and the inner wall of the sleeve hole have a clearance fit. Due to the clearance fit between the inner tube and the sleeve hole, the inner tube and the sleeve hole are relatively loose and easy to insert and remove, and the inner tube can be easily removed and inserted into the sleeve hole when replacing the inner tube.

[0011] Preferably, the lower end of the inner tube abuts against the upper side of the nozzle. The upper side of the nozzle can support the lower end of the inner tube to prevent the inner tube from falling downwards.

[0012] Preferably, a positioning step is provided on the inner side wall of the sleeve hole, and the lower end of the inner tube abuts against the positioning step. The positioning step can support the lower end of the inner tube to prevent the inner tube from falling downward.

[0013] Preferably, the outer side wall of the inner tube is threadedly connected to the inner side wall of the sleeve hole.

[0014] Preferably, a first connecting stud is provided on the upper side of the nozzle, the spray hole passes through the first connecting stud, and a first screw hole is provided on the lower side of the sleeve hole, the first connecting stud being threadedly connected to the first screw hole. The nozzle and the sleeve are fixedly connected via the first connecting stud and the first screw hole, facilitating assembly and disassembly of the nozzle.

[0015] On the other hand, the present invention also proposes a spinneret assembly having the above-mentioned electrospinning nozzle, the spinneret assembly also includes a spinneret seat, a liquid storage cavity is provided in the spinneret seat, a plurality of liquid outlet holes are provided on the spinneret seat, and the plurality of liquid outlet holes are all connected to the liquid storage cavity. There are multiple electrospinning nozzles, and the multiple electrospinning nozzles are arranged in a one-to-one correspondence with the multiple liquid outlet holes. The flow-averaging capillaries are connected to the corresponding liquid outlet holes, and the outer jacket is detachably connected to the spinneret seat.

[0016] Multiple electrospinning nozzles can be detachably mounted on a spinneret. The spinning liquid in the liquid storage chamber is ejected through the uniform flow capillaries and liquid spray holes in the multiple electrospinning nozzles. The uniform flow capillaries in the inner tube can make the amount of spinning liquid in the multiple electrospinning nozzles more uniform. At the same time, the processing cost and maintenance cost of the electrospinning nozzles are low.

[0017] Preferably, a second connecting stud is provided on the upper side of the outer sleeve, the sleeve hole passes through the second connecting stud, and the liquid outlet hole is provided with an internal thread, and the second connecting stud is threadedly connected to the liquid outlet hole. The outer sleeve is connected and fixed to the spinneret via the second connecting stud and the liquid outlet hole, facilitating the assembly and disassembly of the electrospinning nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic cross-sectional view of the first embodiment of the electrospinning nozzle of the present utility model;

[0020] Figure 2 This is a schematic diagram of the exploded structure of the first embodiment of the electrospinning nozzle of the utility model;

[0021] Figure 3 This is a schematic cross-sectional view of a second embodiment of an electrospinning nozzle of the present utility model;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the second embodiment of the electrospinning nozzle of the utility model;

[0023] Figure 5 This is a schematic structural diagram of the spinneret assembly of the present invention.

[0024] In the accompanying drawings: 1-electrospinning nozzle, 2-outer jacket, 21-hole, 22-positioning step, 23-first screw hole, 24-second connecting stud, 3-inner tube, 31-flow-uniform capillary hole, 4-nozzle, 41-spray hole, 42-first connecting stud, 5-spinneret, 51-liquid storage chamber, 52-liquid outlet.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, and back, the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] like Figures 1 to 4 As shown, an electrospinning nozzle 1 includes an outer shell 2, an inner tube 3 and a nozzle 4.

[0030] A sleeve hole 21 is provided on the inner side of the outer sleeve 2 and penetrates from top to bottom.

[0031] The inner tube 3 is inserted into the sleeve hole 21, and a flow-equalizing capillary hole 31 is provided on the inner side of the inner tube 3. The flow-equalizing capillary hole 31 passes through from top to bottom. The inner tube 3 and the outer sleeve 2 are detachably connected. The flow-equalizing capillary hole 31 is set to have a smaller diameter and a larger aspect ratio, which can slow down and stabilize the flow rate when the spinning solution passes through.

[0032] The nozzle 4 is provided on the lower side of the outer sleeve 2 and the inner tube 3 , and the nozzle 4 is detachably connected to the outer sleeve 2 . The nozzle 4 is provided with a liquid spraying hole 41 , which is through-through from top to bottom and directly faces the flow-uniform capillary hole 31 .

[0033] The electrospinning nozzle 1 includes an outer shell 2, an inner tube 3 and a nozzle 4 which are separately arranged. The inner tube 3 is inserted into the sleeve hole 21 of the outer shell 2. During spinning, the spinning liquid passes through the flow-equalizing capillary holes 31 in the inner tube 3 and the liquid spraying holes 41 in the nozzle 4 and is sprayed out from the liquid spraying holes. The flow-equalizing capillary holes 31 in the inner tube 3 can be set with a larger aspect ratio, and the spinning liquid can slow down and stabilize the flow rate when flowing through the flow-equalizing capillary holes 31.

[0034] Since the flow-equalizing capillary holes 31 with a large aspect ratio are arranged in the inner tube 3, the diameter of the sleeve hole 21 in the outer shell 2 can be made larger, reducing the processing difficulty and processing cost of the outer shell 2. The inner tube 3 can use ready-made thin tube raw materials with smaller diameter inner holes, and there is no need to specially process the flow-equalizing capillary holes on a part. These thin tube raw materials are mass-produced, cut to the corresponding length as needed, and then simply processed on the end face to be used as the inner tube 3, which has a low processing cost. Moreover, when the flow-equalizing capillary holes 31 become blocked and difficult to clear, only a new inner tube 3 needs to be replaced, and the outer shell 2 does not need to be replaced, which can reduce the equipment maintenance cost. In addition, the length of the spray hole 41 of the nozzle 4 can be set to be shorter, which has lower processing difficulty and cost. It is easy to clear when blocked, and it is also convenient to replace nozzles with spray holes of different sizes according to different needs, so that the entire system can be more adaptable to smaller nozzles, making spinning more stable. By providing a separate outer shell 2, inner tube 3 and nozzle 4, the electrospinning nozzle 1 can reduce the overall processing difficulty and production cost, and has lower maintenance costs compared to the existing method of processing a liquid injection hole with a large aspect ratio on a single part and replacing the entire part.

[0035] In some specific embodiments, the outer wall of the inner tube 3 is loosely fitted with the inner wall of the sleeve hole 21. Due to the loose fit between the inner tube 3 and the sleeve hole 21, the inner tube 3 is relatively loose and easy to insert and remove from the sleeve hole 21. When replacing the inner tube 3, it is easy to remove the inner tube 3 and insert the inner tube 3 into the sleeve hole 21.

[0036] The inner tube 3 can be inserted into the sleeve hole 21 or taken out from the upper side of the sleeve hole 21 , and the position of the lower side of the inner tube 3 is limited by the outer sleeve 2 or the nozzle 4 .

[0037] Example 1: Reference Figure 1 and Figure 2 , the lower end of the inner tube 3 abuts against the upper side of the nozzle 4. The upper side of the nozzle 4 can support the lower end of the inner tube 3 to prevent the inner tube 3 from falling downwards.

[0038] Example 2: Reference Figure 3 and Figure 4 A positioning step 22 is provided on the inner side wall of the sleeve hole 21, and the lower end of the inner tube 3 abuts on the positioning step 22. The positioning step 22 can support the lower end of the inner tube 3 to prevent the inner tube 3 from falling downward.

[0039] In other embodiments, the outer wall of the inner tube 3 is threadedly connected to the inner wall of the sleeve hole 21. The threaded connection between the inner tube 3 and the outer sleeve 2 can achieve a detachable connection. In other embodiments, the inner tube 3 can also be detachably connected by fixing it to the sleeve hole 21 by means of a screw or the like.

[0040] In some specific embodiments, a first connecting stud 42 is provided on the upper side of the nozzle 4, through which the spray hole 41 passes. A first screw hole 23 is provided on the lower side of the sleeve hole 21, and the first connecting stud 42 is threadedly connected to the first screw hole 23. The nozzle 4 and the outer sleeve 2 are fixedly connected via the first connecting stud 42 and the first screw hole 23, facilitating assembly and disassembly of the nozzle 4. In other embodiments, the nozzle 4 and the outer sleeve 2 can also be detachably connected via screws or a snap-fit ​​connection.

[0041] On the other hand, refer to Figure 5 A spinning assembly having the above-mentioned electrospinning nozzle 1, the spinning assembly also includes a spinneret 5, a liquid storage chamber 51 is provided in the spinneret 5, and a plurality of liquid outlet holes 52 are provided on the spinneret 5, and the plurality of liquid outlet holes 52 are all connected to the liquid storage chamber 51. There are multiple electrospinning nozzles 1, and the multiple electrospinning nozzles 1 are arranged in a one-to-one correspondence with the plurality of liquid outlet holes 52. The uniform flow capillary pores 31 are connected to the corresponding liquid outlet holes 52, and the outer sleeve 2 is detachably connected to the spinneret 5.

[0042] Multiple electrospinning nozzles 1 can be detachably mounted on the spinneret 5, and the spinning liquid in the liquid storage chamber 51 is ejected through the uniform flow capillaries 31 and the liquid ejection holes 41 in the multiple electrospinning nozzles 1. The uniform flow capillaries 31 in the inner tube 3 can make the amount of spinning liquid in the multiple electrospinning nozzles 1 more uniform. At the same time, the processing cost and maintenance cost of the electrospinning nozzle 1 are low.

[0043] In some specific embodiments, a second connecting stud 24 is provided on the upper side of the outer sleeve 2, through which the sleeve hole 21 passes. An internal thread is provided in the liquid outlet 52, and the second connecting stud 24 is threadedly connected to the liquid outlet 52. The outer sleeve 2 is fixedly connected to the spinneret 5 via the second connecting stud 24 and the liquid outlet 52, facilitating assembly and disassembly of the electrospinning nozzle 1.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electrospinning nozzle, characterized in that: include: An outer jacket (2), wherein a sleeve hole (21) is provided on the inner side of the outer jacket (2), and the sleeve hole (21) is passed through from top to bottom; An inner tube (3), the inner tube (3) being inserted into the sleeve hole (21), the inner side of the inner tube (3) being provided with a flow-equalizing capillary hole (31), the flow-equalizing capillary hole (31) being passed through vertically, and the inner tube (3) being detachably connected to the outer sleeve (2); A nozzle (4) is provided on the lower side of the outer sleeve (2) and the inner tube (3), and the nozzle (4) is detachably connected to the outer sleeve (2). The nozzle (4) is provided with a liquid spray hole (41), and the liquid spray hole (41) is through-through in the vertical direction, and the liquid spray hole (41) is directly opposite to the flow-uniform capillary hole (31).

2. The electrospinning nozzle according to claim 1, characterized in that There is a clearance fit between the outer side wall of the inner tube (3) and the inner side wall of the sleeve hole (21).

3. The electrospinning nozzle according to claim 2, characterized in that The lower end of the inner tube (3) abuts against the upper side of the nozzle (4).

4. The electrospinning nozzle according to claim 2, characterized in that A positioning step (22) is provided on the inner side wall of the sleeve hole (21), and the lower end of the inner tube (3) abuts against the positioning step (22).

5. The electrospinning nozzle according to claim 1, characterized in that The outer wall of the inner tube (3) is threadedly connected to the inner wall of the sleeve hole (21).

6. The electrospinning nozzle according to claim 1, characterized in that A first connecting stud (42) is provided on the upper side of the nozzle (4), the liquid spraying hole (41) passes through the first connecting stud (42), a first screw hole (23) is provided on the lower side of the sleeve hole (21), and the first connecting stud (42) is threadedly connected to the first screw hole (23).

7. A spinning assembly, characterized in that The invention comprises an electrospinning nozzle (1) as described in any one of claims 1 to 6, wherein the spinneret assembly further comprises a spinneret (5), wherein a liquid storage chamber (51) is provided in the spinneret (5), and a plurality of liquid outlet holes (52) are provided on the spinneret (5), and the plurality of liquid outlet holes (52) are all connected to the liquid storage chamber (51), the number of the electrospinning nozzles (1) is multiple, and the plurality of the electrospinning nozzles (1) are arranged in a one-to-one correspondence with the plurality of the liquid outlet holes (52), the flow-averaging capillaries (31) are connected to the corresponding liquid outlet holes (52), and the outer jacket (2) is detachably connected to the spinneret (5).

8. The spinning assembly according to claim 7, wherein A second connecting stud (24) is provided on the upper side of the outer sleeve (2), the sleeve hole (21) passes through the second connecting stud (24), an internal thread is provided in the liquid outlet hole (52), and the second connecting stud (24) is threadedly connected to the liquid outlet hole (52).

Images