A coaxial needle module with replaceable needle

Abstract

The application discloses a coaxial needle module with replaceable needle, which comprises a base, a needle fixing base, a needle assembly and a sheath gas shell, wherein the needle assembly comprises an inner needle assembly and an outer needle assembly, the needle fixing base comprises a base and a needle fixing base body, the needle fixing base body is arranged on the base, the base is detachably locked with the base, the needle fixing base body is further provided with an outer needle fixing column, an outer liquid input port and an inner needle adjusting jackscrew hole, the sheath gas shell is arranged above the needle fixing base and detachably locked with the needle fixing base, the outer needle assembly comprises an outer needle and an outer needle assembly body, the outer needle is arranged in the outer needle assembly body and is in interference fit with the outer needle fixing column, and the sheath gas shell is further provided with a sheath gas input port and an outer needle adjusting jackscrew hole. The concentricity of the inner needle and the outer needle can be adjusted through the inner needle adjusting jackscrew hole and the outer needle adjusting jackscrew hole respectively. In addition, the sheath gas input port on the sheath gas shell can facilitate loading of sheath gas and improve the production efficiency of core-shell fibers.

Description

Technical Field

[0001] This application relates to the field of high voltage electrostatic fiber spinning manufacturing, specifically to a coaxial needle module with replaceable needles. Background Technology

[0002] Electrospinning technology can prepare micron / nanofiber materials, which have wide applications in many fields such as energy storage, air filtration, biomedicine, and wastewater treatment. Coaxial needles, with their outer needle nested within an inner needle forming concentric circles, can be used to prepare special fiber structures such as core-shell nanofibers and hollow nanofibers, thus playing a crucial role in electrospinning. However, welded coaxial needles are expensive, difficult to maintain and clean, and suffer from problems such as the inability to change the needle diameter, adjust the concentricity of the inner and outer needles, and produce uneven liquid supply to the outer needle. Summary of the Invention

[0003] In view of the above problems, there is a need to provide a coaxial needle module with replaceable needles to solve the problems of existing coaxial needles, such as the inability to change the needle diameter, the inability to adjust the concentricity of the inner and outer needles, and uneven liquid supply from the outer needle.

[0004] This application provides a coaxial needle module with replaceable needles, including a base, a needle holder, a needle assembly, and a sheath gas shell, wherein the needle assembly includes an inner needle assembly and an outer needle assembly;

[0005] The base is equipped with an internal liquid inlet and a terminal block.

[0006] The needle holder includes a base and a needle holder body. The needle holder body is disposed on the base. The base and the base are detachably locked. The needle holder body is also provided with an outer needle fixing post, an outer liquid inlet and an inner needle adjusting set screw hole.

[0007] The sheath gas shell is disposed above the needle fixing seat and is detachably locked to the needle fixing seat. The outer needle assembly includes an outer needle head and an outer needle assembly body. The outer needle head is disposed in the outer needle assembly body and is interference-fitted with the outer needle fixing post. The sheath gas shell is also provided with a sheath gas inlet and an outer needle adjustment set screw hole.

[0008] The inner needle assembly includes an inner needle tip and an inner needle tip body. The inner needle tip is disposed within the inner needle assembly body. The inner needle assembly body is detachably locked to the base. The inner needle tip is also nested within the outer needle tip. Both the inner and outer needle tips can extend out of the sheath shell.

[0009] Optionally, a sealing assembly is also included, which is fitted onto the inner needle and pressed tightly against the needle holder for sealing.

[0010] Optionally, the sealing assembly includes a first silicone gasket and a second silicone gasket, wherein the first silicone gasket is smaller than the second silicone gasket, the first silicone gasket is sleeved on the inner needle and placed on the second silicone gasket, and the second silicone gasket is tightly pressed and sealed with the needle holder.

[0011] Optionally, it also includes an inner needle fluid chamber connector and an outer needle fluid chamber connector, wherein the inner needle fluid chamber connector and the inner fluid inlet are detachably connected, and the outer needle fluid chamber connector and the outer fluid inlet are detachably connected.

[0012] Optionally, the inner needle fluid chamber connector is an internally threaded quick connector and / or the outer needle fluid chamber connector is an L-shaped quick connector.

[0013] Optionally, the detachable locking of the sheath gas shell and the needle fixing seat includes a threaded connection, wherein the threaded connection includes: the needle fixing seat is provided with an external thread, and the sheath gas shell is provided with an internal thread adapted to the external thread, and the external thread and the internal thread are locked together by the thread.

[0014] Optionally, there are multiple inner needle adjusting screw holes, which are circumferentially arranged on the needle fixing body. Each inner needle adjusting screw hole contains an inner needle adjusting screw, which adjusts the angle of the inner needle head relative to the axis by abutting against the inner needle head.

[0015] Optionally, there are multiple external needle adjusting set screw holes, which are circumferentially arranged on the sheath gas shell. Each external needle adjusting set screw hole contains an external needle adjusting set screw, which adjusts the angle of the external needle head relative to the axis by abutting against the external needle head.

[0016] Optionally, an annular steel wire mesh is also provided inside the outer needle fixing post.

[0017] Optionally, the outer diameter of the outer needle is 7G to 18G, and the outer diameter of the inner needle is 19G to 30G.

[0018] Unlike existing technologies, the above-mentioned technical solution involves a coaxial needle module with replaceable needles, including a base, a needle holder, a needle assembly, and a sheath gas shell. The needle assembly includes an inner needle assembly and an outer needle assembly. The needle holder includes a base and a needle holder body, with the needle holder body mounted on the base. The base and the base are detachably locked. The needle holder body also has an outer needle fixing post, an external liquid inlet, and an inner needle adjustment set screw hole. The sheath gas shell is located above the needle holder and is detachably locked to it. The outer needle assembly includes an outer needle head and an outer needle assembly body. The outer needle head is located within the outer needle assembly body and is interference-fitted with the outer needle fixing post. The sheath gas shell also has a sheath gas inlet and an outer needle adjustment set screw hole. The inner needle assembly includes an inner needle head and an inner needle head body. The inner needle head is located within the inner needle assembly body and is detachably locked to the base. The inner needle head is also nested within the outer needle head. Both the inner and outer needle heads can extend out of the sheath gas shell.

[0019] The inner and outer needles of this application are standard parts, and a wide range of replaceable needles are available. The concentricity of the inner and outer needles can be adjusted through the inner needle adjusting set screw hole on the needle holder and the outer needle adjusting set screw hole on the sheath gas shell, respectively. The sheath gas inlet on the sheath gas shell facilitates the loading of sheath gas, thereby improving the production efficiency of core-shell fibers.

[0020] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0021] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of the present invention and other related contents, and should not be considered as limitations on this application.

[0022] In the accompanying drawings of the instruction manual:

[0023] Figure 1 This is a schematic diagram of the overall structure of a coaxial needle module with replaceable needles according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the lower half of the overall structure of a coaxial needle module with replaceable needles according to an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the upper half of the cross-sectional view of the overall structure of a coaxial needle module with replaceable needles according to an embodiment of this application.

[0026] Figure 4This is a schematic diagram of the external structure of a needle holder according to an embodiment of this application;

[0027] Figure 5 This is a cross-sectional view of a needle holder according to an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the external structure of the sheath gas shell according to an embodiment of this application;

[0029] Figure 7 This is a cross-sectional view of a sheath gas shell according to an embodiment of this application.

[0030] The reference numerals used in the above figures are explained as follows:

[0031] 1. Inner needle fluid chamber connector;

[0032] 2. Terminals;

[0033] 3. Base;

[0034] 4. Needle holder;

[0035] 41. External liquid inlet;

[0036] 42. Inner needle adjusting set screw hole;

[0037] 43. External thread;

[0038] 44. Circular wire mesh;

[0039] 45. External pin fixing post;

[0040] 46. ​​Base;

[0041] 5. External needle fluid chamber connector;

[0042] 6. Sheath gas shell;

[0043] 61. Sheath gas inlet;

[0044] 62. External needle adjusting set screw hole;

[0045] 63. Internal thread;

[0046] 7. Outer needle assembly;

[0047] 71. External needle tip;

[0048] 8. Inner needle assembly;

[0049] 81. Inner needle;

[0050] 82. Inner needle body;

[0051] 91. Second silicone gasket;

[0052] 92. First silicone gasket. Detailed Implementation

[0053] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0054] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0055] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0056] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0057] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0058] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0059] In this application, expressions such as "greater than", "less than", and "exceeding" are understood to exclude the stated number; expressions such as "above", "below", and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times", unless otherwise explicitly specified.

[0060] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0061] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0062] like Figures 1 to 7 As shown, this application provides a coaxial needle module with replaceable needles, including a base 3, a needle holder 4, a needle assembly and a sheath gas shell 6, wherein the needle assembly includes an inner needle assembly 8 and an outer needle assembly 7.

[0063] The base 3 is provided with an internal liquid inlet and a terminal block 2;

[0064] The needle holder 4 includes a base 46 and a needle holder body. The needle holder body is disposed on the base 46. The base 46 is detachably locked to the base 3. The needle holder body is also provided with an outer needle fixing post 45, an external liquid inlet 41 and an inner needle adjusting set screw hole 42.

[0065] The sheath gas shell 6 is disposed above the needle fixing seat 4 and is detachably locked to the needle fixing seat 4. The outer needle assembly 7 includes an outer needle head 71 and an outer needle assembly body. The outer needle head 71 is disposed in the outer needle assembly body and is press-fitted with the outer needle fixing post 45. The sheath gas shell 6 is also provided with a sheath gas inlet 61 and an outer needle adjustment set screw hole 62.

[0066] The inner needle assembly 8 includes an inner needle tip 81 and an inner needle tip body 82. The inner needle tip 81 is disposed inside the inner needle assembly body 82. The inner needle assembly body 82 is detachably locked to the base 3. The inner needle tip 81 is also nested inside the outer needle tip 71. The inner needle tip 81 and the outer needle tip 71 can extend out of the sheath shell 6.

[0067] In this embodiment, the base 46 and the base 3, the sheath gas shell 6 and the needle fixing seat 4, and the inner needle assembly body 82 and the base 3 can be detachably locked by bolt connection, screw connection or pin connection.

[0068] In this embodiment, the base 3 and the needle holder 4 can be made of metal or metal alloy, such as copper or brass. The sheath shell 6 can be made of PMMA.

[0069] In some embodiments, the coaxial needle module further includes an inner needle fluid chamber connector 1 and an outer needle fluid chamber connector 5, wherein the inner needle fluid chamber connector 1 and the inner fluid inlet are detachably connected, and the outer needle fluid chamber connector 5 and the outer fluid inlet 41 are detachably connected.

[0070] Optionally, the inner needle fluid chamber connector 1 is an internal thread quick connector and / or the outer needle fluid chamber connector 5 is an L-shaped quick connector.

[0071] In short, when the coaxial needle module is in use, the liquid required by the inner needle assembly 8 is injected through the inner needle liquid chamber connector 1, the liquid required by the outer needle assembly 7 is injected through the outer needle liquid chamber connector 5, and the sheath gas enters through the sheath gas inlet 61 on the sheath gas shell 6. During use, it is very convenient to load liquid and sheath gas, thereby improving the production efficiency of core-shell fiber.

[0072] In some embodiments, the coaxial needle module further includes a sealing assembly, which is sleeved on the inner needle and presses tightly against the needle holder for sealing.

[0073] Optionally, the sealing assembly includes a first silicone gasket 92 and a second silicone gasket 91. The size of the first silicone gasket 92 is smaller than that of the second silicone gasket 91. The first silicone gasket 92 is sleeved on the inner needle 81 and placed on the second silicone gasket 91. The second silicone gasket 91 is tightly pressed and sealed with the needle holder 4.

[0074] By setting the first silicone gasket 92 and the second silicone gasket 91, a sealing effect can be achieved to prevent leakage of external liquid.

[0075] In some embodiments, the detachable locking of the sheath gas shell 6 and the needle fixing seat 4 includes a threaded connection, wherein the threaded connection includes: the needle fixing seat 4 is provided with an external thread 43, and the sheath gas shell 6 is provided with an internal thread 63 adapted to the external thread 43, and the external thread 43 and the internal thread 63 are locked together by the thread.

[0076] In some embodiments, there are multiple inner needle adjusting top screw holes 42, which are circumferentially arranged on the needle fixing body. Each inner needle adjusting top screw hole 42 is provided with an inner needle adjusting top screw, which adjusts the angle of the inner needle head 81 relative to the axis by abutting against the inner needle head 81.

[0077] Preferably, the number of inner needle adjustment set screw holes 42 is three, which are evenly distributed on the cylindrical wall surface of the needle fixing seat 4 with a central angle of 120°, and the needle position is finely adjusted by pressing the inner needle 81 with the set screw.

[0078] In some embodiments, there are multiple external needle adjustment top screw holes 62, which are circumferentially arranged on the sheath gas shell. Each external needle adjustment top screw hole 62 is provided with an external needle adjustment top screw, which adjusts the angle of the external needle head 71 relative to the axis by abutting against the external needle head 71.

[0079] Preferably, the number of the outer needle adjustment set screw holes 62 is three, which are evenly distributed on the cylindrical wall surface of the sheath gas shell with a central angle of 120°. The concentricity of the inner and outer needles is finely adjusted by pressing the outer needle head 71 with the set screw.

[0080] In this way, the concentricity of the inner needle head 81 and the outer needle head 71 can be finely adjusted by rotating the inner needle adjusting the adjusting screw in the adjusting screw hole 42 and rotating the outer needle adjusting the adjusting screw in the adjusting screw hole 62.

[0081] In some embodiments, an annular wire mesh 44 is further provided inside the outer needle fixing post 45. The annular wire mesh 44 can increase the flow resistance of the external liquid and make the external liquid supply more uniform by utilizing the wetting effect of the liquid.

[0082] In some embodiments, the inner needle 81 and the outer needle 71 are preferably made of stainless steel, and their dimensions can be standard parts to further reduce the cost of equipment components. Specifically, the outer diameter of the outer needle 71 is 7G to 18G, and the outer diameter of the inner needle 81 is 19G to 30G.

[0083] This application provides a coaxial needle with replaceable inner and outer needles, including a base, a needle holder, a sealing assembly, a sheath gas shell, an inner needle assembly, an outer needle assembly, and concentricity adjustment screws. The replaceable outer needle ranges from 7G to 18G, and the replaceable inner needle ranges from 19G to 30G. Three adjustment screw holes are respectively provided on the needle holder and the sheath gas shell, allowing adjustment of the concentricity of the inner and outer needles by pressing the screws against the inner and outer needles. By placing an annular steel wire mesh within the cylindrical space of the outer needle holder, the flow resistance of the external liquid can be increased, solving the problem of uneven liquid supply from the outer needle. Simultaneously, a large and a small silicone gasket are provided on the inner and outer needles, providing a double-layer seal to prevent external liquid leakage. The sheath gas inlet on the sheath gas shell facilitates the loading of sheath gas, improving the production efficiency of core-shell fibers.

[0084] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A coaxial needle module with replaceable needles, characterized in that, It includes a base, a needle holder, a needle assembly, and a sheath gas shell, wherein the needle assembly includes an inner needle assembly and an outer needle assembly; The base is equipped with an internal liquid inlet and a terminal block. The needle holder includes a base and a needle holder body. The needle holder body is disposed on the base. The base and the base are detachably locked. The needle holder body is also provided with an outer needle fixing post, an outer liquid inlet and an inner needle adjusting set screw hole. The sheath gas shell is disposed above the needle fixing seat and is detachably locked to the needle fixing seat. The outer needle assembly includes an outer needle head and an outer needle assembly body. The outer needle head is disposed in the outer needle assembly body and is interference-fitted with the outer needle fixing post. The sheath gas shell is also provided with a sheath gas inlet and an outer needle adjustment set screw hole. The inner needle assembly includes an inner needle tip and an inner needle tip body. The inner needle tip is disposed within the inner needle assembly body. The inner needle assembly body is detachably locked to the base. The inner needle tip is also nested within the outer needle tip. The inner needle tip and the outer needle tip can extend out of the sheath shell. The number of inner needle adjusting screw holes is multiple, and the multiple inner needle adjusting screw holes are circumferentially arranged on the needle fixing seat body. Each inner needle adjusting screw hole is provided with an inner needle adjusting screw. The inner needle adjusting screw adjusts the angle of the inner needle head relative to the axis by abutting against the inner needle head. The number of the external needle adjustment set screw holes is multiple, and the multiple external needle adjustment set screw holes are circumferentially arranged on the sheath gas shell. Each external needle adjustment set screw hole is provided with an external needle adjustment set screw, and the external needle adjustment set screw adjusts the angle of the external needle head relative to the axis by abutting against the external needle head.

2. The coaxial needle module with replaceable needles as described in claim 1, characterized in that, It also includes a sealing assembly, which is fitted onto the inner needle and pressed tightly against the needle holder for sealing.

3. The coaxial needle module with replaceable needles as described in claim 2, characterized in that, The sealing assembly includes a first silicone gasket and a second silicone gasket. The first silicone gasket is smaller than the second silicone gasket. The first silicone gasket is fitted onto the inner needle and placed on the second silicone gasket. The second silicone gasket is pressed tightly against the needle holder for sealing.

4. The coaxial needle module with replaceable needles as described in claim 1, characterized in that, It also includes an inner needle fluid chamber connector and an outer needle fluid chamber connector, wherein the inner needle fluid chamber connector and the inner fluid inlet are detachably connected, and the outer needle fluid chamber connector and the outer fluid inlet are detachably connected.

5. The coaxial needle module with replaceable needles as described in claim 1, characterized in that, The inner needle fluid chamber connector is an internal thread quick connector and / or the outer needle fluid chamber connector is an L-shaped quick connector.

6. The coaxial needle module with replaceable needles as described in claim 1, characterized in that, The detachable locking of the sheath gas shell and the needle fixing seat includes a threaded connection. The threaded connection includes: the needle fixing seat is provided with an external thread, and the sheath gas shell is provided with an internal thread that matches the external thread. The external thread and the internal thread are locked together by the thread.

7. The coaxial needle module with replaceable needles as described in claim 1, characterized in that, The outer needle fixing post is also equipped with a ring-shaped steel wire mesh.

8. The coaxial needle module with replaceable needles as described in claim 1, characterized in that, The outer diameter of the outer needle is 7G~18G, and the outer diameter of the inner needle is 19G~30G.

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