Coaxial needle head module with replaceable needle head

Abstract

The coaxial needle head module comprises a base, a needle head fixing seat, a needle head assembly and a sheath gas shell, the needle head assembly comprises an inner needle assembly and an outer needle assembly, the needle head fixing seat comprises a base and a needle head fixing seat body, the needle head fixing seat body is arranged on the base, the base and the base are detachably locked, and the sheath gas shell is arranged on the base. The needle head fixing seat body is also 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 head fixing seat and detachably locked with the needle head fixing seat, the outer needle assembly comprises an outer needle head and an outer needle assembly body, the outer needle head 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 head and the outer needle head can be adjusted through the inner needle adjusting jackscrew hole and the outer needle adjusting jackscrew hole respectively. In addition, sheath gas can be loaded conveniently through the sheath gas input port in the sheath gas shell, and the production efficiency of the core-shell fiber is improved.

Description

Technical Field

[0001] The present application relates to the field of high-voltage electrostatic fiber spinning manufacturing, and in particular to a coaxial needle module with replaceable needles. Background Art

[0002] Electrospinning technology can be used to prepare micron / nano fiber materials, which are widely used in many fields such as energy storage, air filtration, biomedicine, sewage treatment, etc. Coaxial needles are a needle structure in which an outer needle is nested inside an inner needle to form concentric circles. They can be used to prepare special fiber structures such as core-shell nanofibers and hollow nanofibers. Therefore, they have important applications in the field of electrospinning. Welded coaxial needles are expensive, difficult to maintain and clean, and have problems 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 to the outer needle. Summary of the invention

[0003] In view of the above problems, it is necessary to provide a coaxial needle module with a replaceable needle 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 the uneven liquid supply of the outer needle.

[0004] The present application provides a coaxial needle module with a replaceable needle, comprising a base, a needle fixing seat, a needle assembly and a sheath gas housing, wherein the needle assembly comprises an inner needle assembly and an outer needle assembly;

[0005] The base is provided with an internal liquid input port and a terminal;

[0006] The needle fixing seat comprises a base and a needle fixing seat body, the needle fixing seat body is arranged on the base, the base and the base are detachably locked, and the needle fixing seat body is also provided with an outer needle fixing column, an external liquid input port and an inner needle adjustment top screw hole;

[0007] The sheath gas shell is arranged above the needle fixing seat and is detachably locked with the needle fixing seat. 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 interference fit with the outer needle fixing column. The sheath gas shell is also provided with a sheath gas input port and an outer needle adjustment top screw hole.

[0008] The inner needle assembly includes an inner needle and an inner needle body. The inner needle is arranged in the inner needle assembly body. The inner needle assembly body and the base are detachably locked. The inner needle is also nested in the outer needle. The inner needle and the outer needle can extend out of the sheath air shell.

[0009] Optionally, a sealing component is also included, which is sleeved on the inner needle and tightly pressed and sealed with the needle fixing seat.

[0010] Optionally, 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 sleeved over the inner needle and placed on the second silicone gasket, and the second silicone gasket is tightly sealed with the needle fixing seat.

[0011] Optionally, it also includes an inner needle liquid cavity joint and an outer needle liquid cavity joint, wherein the inner needle liquid cavity joint and the inner liquid input port are detachably connected, and the outer needle liquid cavity joint and the outer liquid input port are detachably connected.

[0012] Optionally, the inner needle liquid cavity connector is an internal thread quick connector and / or the outer needle liquid cavity 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, and 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 by thread.

[0014] Optionally, there are multiple inner needle adjustment top screw holes, and the multiple inner needle adjustment top screw holes are circumferentially arranged on the needle fixing seat body, and an inner needle adjustment top screw is arranged in each inner needle adjustment top screw hole. The inner needle adjustment top screw adjusts the angle of the inner needle relative to the axis by abutting against the inner needle.

[0015] Optionally, there are multiple outer needle adjustment top screw holes, and the multiple outer needle adjustment top screw holes are circumferentially arranged on the sheath air shell, and an outer needle adjustment top screw is arranged in each of the outer needle adjustment top screw holes. The outer needle adjustment top screw adjusts the angle of the outer needle head relative to the axis by abutting against the outer needle head.

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

[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] Different from the prior art, the coaxial needle module with replaceable needle involved in the above technical scheme comprises a base, a needle fixing seat, a needle assembly and a sheath gas shell, the needle assembly comprises an inner needle assembly and an outer needle assembly, the needle fixing seat comprises a base and a needle fixing seat body, the needle fixing seat body is arranged on the base, the base and the base are detachably locked, and the needle fixing seat body is also provided with an outer needle fixing column, an external liquid input port and an inner needle adjustment top screw hole; the sheath gas shell is arranged above the needle fixing seat and is detachably locked with the needle fixing seat, 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 interference fit with the outer needle fixing column, the sheath gas shell is also provided with a sheath gas input port and an outer needle adjustment top screw hole; the inner needle assembly comprises an inner needle and an inner needle body, the inner needle is arranged in the inner needle assembly body, the inner needle assembly body and the base are detachably locked, the inner needle is also nested in the outer needle, and the inner needle and the outer needle can extend out of the sheath gas shell.

[0019] The inner needle and outer needle of the present application adopt standard parts, and the range of replaceable needles is wide. The concentricity of the inner needle and the outer needle can be adjusted respectively through the inner needle adjusting screw hole on the needle fixing seat and the outer needle adjusting screw hole on the sheath gas shell. The sheath gas input port on the sheath gas shell can facilitate the loading of sheath gas, thereby improving the production efficiency of core-shell fibers.

[0020] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation mode and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present invention and other related contents, and shall not be considered as limiting the present application.

[0022] In the drawings of the specification:

[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 the present application;

[0024] Figure 2 It is a schematic diagram of the lower half of a cross-sectional view of the overall structure of a coaxial needle module with replaceable needles involved in an embodiment of the present application;

[0025] Figure 3 It is a schematic diagram of the upper half of a cross-sectional view of the overall structure of a coaxial needle module with replaceable needles involved in an embodiment of the present application;

[0026] Figure 4This is a schematic diagram of the appearance structure of a needle fixing seat involved in one embodiment of the present application;

[0027] Figure 5 A cross-sectional view of a needle fixing seat according to an embodiment of the present application;

[0028] Figure 6 This is a schematic diagram of the appearance structure of a sheath gas housing involved in one embodiment of the present application;

[0029] Figure 7 It is a cross-sectional view of a sheath air housing involved in one embodiment of the present application.

[0030] The reference numerals in the above drawings are described as follows:

[0031] 1. Inner needle liquid cavity connector;

[0032] 2. Terminals;

[0033] 3. Base;

[0034] 4. Needle fixing seat;

[0035] 41. External liquid input port;

[0036] 42. Inner needle adjustment top screw hole;

[0037] 43. External thread;

[0038] 44. Circular wire mesh;

[0039] 45. External needle fixing column;

[0040] 46. ​​Base;

[0041] 5. External needle fluid chamber connector;

[0042] 6. Sheath gas shell;

[0043] 61. Sheath gas input port;

[0044] 62. External needle adjustment top screw hole;

[0045] 63. Internal thread;

[0046] 7. External needle assembly;

[0047] 71, external needle;

[0048] 8. Inner needle assembly;

[0049] 81. Inner needle;

[0050] 82. Inner needle body;

[0051] 91. Second silicone gasket;

[0052] 92. The first silicone gasket. DETAILED DESCRIPTION

[0053] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0054] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0055] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0056] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0057] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0058] Without further limitations, in this application, the words "include", "comprises", "has" or other similar open-ended expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0059] In this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0060] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0061] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] like Figures 1 to 7 As shown, the present application provides a coaxial needle module with a replaceable needle, comprising a base 3, a needle fixing seat 4, a needle assembly and a sheath gas housing 6, wherein the needle assembly comprises an inner needle assembly 8 and an outer needle assembly 7;

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

[0064] The needle fixing seat 4 includes a base 46 and a needle fixing seat body, the needle fixing seat body is arranged on the base 46, the base 46 and the base 3 are detachably locked, and the needle fixing seat body is also provided with an outer needle fixing column 45, an external liquid input port 41 and an inner needle adjustment top screw hole 42;

[0065] The sheath gas housing 6 is arranged above the needle fixing seat 4 and is detachably locked with the needle fixing seat 4. The outer needle assembly 7 includes an outer needle 71 and an outer needle assembly body. The outer needle 71 is arranged in the outer needle assembly body and is interference fit with the outer needle fixing column 45. The sheath gas housing 6 is also provided with a sheath gas input port 61 and an outer needle adjustment top screw hole 62.

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

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

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

[0069] In some embodiments, the coaxial needle module further comprises an inner needle liquid cavity connector 1 and an outer needle liquid cavity connector 5, wherein the inner needle liquid cavity connector 1 and the inner liquid input port are detachably connected, and the outer needle liquid cavity connector 5 and the outer liquid input port 41 are detachably connected.

[0070] Optionally, the inner needle liquid cavity connector 1 is an internal thread quick connector and / or the outer needle liquid cavity 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 cavity connector 1, the liquid required by the outer needle assembly 7 is injected through the outer needle liquid cavity connector 5, and the sheath gas enters through the sheath gas input port 61 on the sheath gas shell 6. When in use, the liquid and sheath gas can be loaded very conveniently, thereby improving the production efficiency of the core-shell fiber.

[0072] In some embodiments, the coaxial needle module further comprises a sealing component, which is sleeved on the inner needle and tightly pressed and sealed with the needle fixing seat.

[0073] Optionally, the sealing assembly includes a first silicone gasket 92 and a second silicone gasket 91, the first silicone gasket 92 is smaller than 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, and the second silicone gasket 91 is tightly sealed with the needle fixing seat 4.

[0074] The first silicone gasket 92 and the second silicone gasket 91 can play a sealing role to prevent external liquid from leaking.

[0075] In some embodiments, the sheath gas shell 6 and the needle fixing seat 4 are detachably locked and include a threaded connection, and 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 that is compatible with the external thread 43, and the external thread 43 and the internal thread 63 are locked by threads.

[0076] In some embodiments, there are multiple inner needle adjustment top screw holes 42, and the multiple inner needle adjustment top screw holes 42 are circumferentially arranged on the needle fixing seat body. An inner needle adjustment top screw is arranged in each inner needle adjustment top screw hole 42, and the inner needle adjustment top screw adjusts the angle of the inner needle 81 relative to the axis by abutting against the inner needle 81.

[0077] Preferably, the number of the inner needle adjustment screw holes 42 is three, which are evenly distributed on the cylindrical wall surface of the needle fixing seat 4 at a central angle of 120°, and the inner needle 81 is supported by the screw to fine-tune the needle position.

[0078] In some embodiments, there are multiple outer needle adjustment top screw holes 62, and the multiple outer needle adjustment top screw holes 62 are circumferentially arranged on the sheath air shell. An outer needle adjustment top screw is arranged in each outer needle adjustment top screw hole 62, and the outer needle adjustment top screw adjusts the angle of the outer needle head 71 relative to the axis by abutting against the outer needle head 71.

[0079] Preferably, the number of the outer needle adjustment screw holes 62 is three, which are evenly distributed on the cylindrical wall surface of the sheath air housing with a central angle of 120°, and the outer needle head 71 is supported by the screw to fine-tune the concentricity of the inner and outer needles.

[0080] In this way, the concentricity of the inner needle head 81 and the outer needle head 71 can be fine-tuned by rotating the inner needle adjustment screw in the inner needle adjustment screw hole 42 and rotating the outer needle adjustment screw in the outer needle adjustment screw hole 62.

[0081] In some embodiments, an annular steel wire mesh 44 is further disposed in the outer needle fixing column 45. The annular steel wire mesh 44 can increase the flow resistance of the external liquid and utilize the infiltration effect of the liquid to make the external liquid supply more uniform.

[0082] In some embodiments, the material of the inner needle 81 and the outer needle 71 is preferably stainless steel, and the size and type of the inner needle 81 and the outer needle 71 can be selected from standard parts to further reduce the cost of the 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] The present application provides a coaxial needle with replaceable inner and outer needles, including a base, a needle fixing seat, a sealing assembly, a sheath gas shell, an inner needle assembly, an outer needle assembly, a concentricity adjustment screw, etc. The outer needle can be replaced in the range of 7G to 18G, and the inner needle can be replaced in the range of 19G to 30G. Three adjustment screw holes are respectively provided on the needle fixing seat and the sheath gas shell, and the concentricity of the inner and outer needles can be adjusted by supporting the inner and outer needles with the screws. By placing an annular steel wire mesh in the cylindrical space of the outer needle fixing column, the flow resistance of the external liquid can be increased, and the problem of uneven liquid supply to the external needle can be solved. At the same time, a large and a small silicone gasket are provided on the inner and outer needles, which can play a two-layer sealing role to prevent leakage of the external liquid. The sheath gas input port on the sheath gas shell can facilitate the loading of sheath gas and improve the production efficiency of core-shell fibers.

[0084] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in 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 fixing seat, a needle assembly and a sheath air shell, wherein the needle assembly includes an inner needle assembly and an outer needle assembly; The base is provided with an internal liquid input port and a terminal; The needle fixing seat comprises a base and a needle fixing seat body, the needle fixing seat body is arranged on the base, the base and the base are detachably locked, and the needle fixing seat body is also provided with an outer needle fixing column, an external liquid input port and an inner needle adjustment top screw hole; The sheath gas shell is arranged above the needle fixing seat and is detachably locked with the needle fixing seat. 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 interference fit with the outer needle fixing column. The sheath gas shell is also provided with a sheath gas input port and an outer needle adjustment top screw hole. The inner needle assembly includes an inner needle and an inner needle body. The inner needle is arranged in the inner needle assembly body. The inner needle assembly body and the base are detachably locked. The inner needle is also nested in the outer needle. The inner needle and the outer needle can extend out of the sheath air shell.

2. The coaxial needle module with replaceable needles according to claim 1, characterized in that: It also includes a sealing component, which is sleeved on the inner needle and tightly pressed and sealed with the needle fixing seat.

3. The coaxial needle module with replaceable needles as claimed 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 sleeved on the inner needle and placed on the second silicone gasket. The second silicone gasket is tightly sealed with the needle fixing seat.

4. The coaxial needle module with replaceable needles according to claim 1, characterized in that: It also includes an inner needle liquid cavity joint and an outer needle liquid cavity joint, wherein the inner needle liquid cavity joint and the inner liquid input port are detachably connected, and the outer needle liquid cavity joint and the outer liquid input port are detachably connected.

5. The coaxial needle module with replaceable needles according to claim 1, characterized in that: The inner needle liquid cavity connector is an internal thread quick connector and / or the outer needle liquid cavity connector is an L-shaped quick connector.

6. The coaxial needle module with replaceable needles according to claim 1, characterized in that: The detachable locking of the sheath gas shell and the needle fixing seat includes a threaded connection, and 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 by thread.

7. The coaxial needle module with replaceable needles according to claim 1, characterized in that: There are multiple inner needle adjustment top screw holes, which are circumferentially arranged on the needle fixing seat body. An inner needle adjustment top screw is arranged in each inner needle adjustment top screw hole, and the inner needle adjustment top screw adjusts the angle of the inner needle relative to the axis by abutting against the inner needle.

8. The coaxial needle module with replaceable needles according to claim 1, characterized in that: There are multiple outer needle adjustment top screw holes, which are circumferentially arranged on the sheath air shell. An outer needle adjustment top screw is arranged in each outer needle adjustment top screw hole. The outer needle adjustment top screw adjusts the angle of the outer needle head relative to the axis by abutting against the outer needle head.

9. The coaxial needle module with replaceable needles according to claim 1, characterized in that: An annular steel wire mesh is also arranged inside the outer needle fixing column.

10. The coaxial needle module with replaceable needles according to claim 1, characterized in that: The outer diameter of the outer needle is 7G to 18G, and the outer diameter of the inner needle is 19G to 30G.

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