Array needle head device for electrostatic spinning equipment

Abstract

The utility model discloses an array needle head device for electrostatic spinning equipment. The array needle head device comprises a bottom plate, a sealing piece, an upper plate, a conductive piece and needle heads, a liquid inlet hole is formed in the bottom plate, and a spinning solution penetrates through a sealing piece liquid inlet hole corresponding to the sealing piece through the liquid inlet hole to enter the upper plate and is sprayed out from each needle head on the upper plate; in the upper plate, equidistant branch runners are arranged between a main runner at an initial liquid inlet position and a liquid inlet of each needle head, so that the path lengths of the spinning solution in each area from the main runner to the corresponding needle head are the same, and the liquid supply rates of all the needle heads are kept consistent; the needle heads on the upper plate are arranged in a crossed mode, and the distance between every two adjacent needle heads ranges from 20 mm to 80 mm. 400-2000 needle heads are mounted in each square meter of the upper plate; the electrostatic spinning device successfully solves the problems of non-uniform liquid supply, electric field interference and the like in the traditional electrostatic spinning device, and realizes efficient large-scale production.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrospinning equipment technical field, concretely relates to an array needle device for electrospinning equipment. BACKGROUND

[0002] In the existing electrospinning technology, single needle and simple multi-needle configuration usually leads to significant difference in liquid supply rate between each injection point, and the needle arrangement form is relatively single, which is easy to form regular stripes, thereby affecting the uniformity of fibers; in addition, how close the distance between adjacent needles is, the interaction between the electric fields will also have a negative impact on the spinning process. In order to overcome these problems, improve production efficiency and product quality, it is necessary to develop an array needle device that can ensure the uniformity of liquid supply rate of each needle and reduce the interference of electric field.

[0003] Therefore, the utility model provides an array needle device for electrospinning equipment, which optimizes the layout of the flow channel and the arrangement of the needle to improve the above problems, so as to solve the problems of uneven liquid supply, electric field interference, and uneven spinning film formation in the traditional single needle or simple multi-needle system, and realize efficient and uniform large-scale electrospinning production. SUMMARY

[0004] The utility model discloses a kind of array needle devices for electrospinning equipment, to realize efficient, uniform large-scale electrospinning production. To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] An array needle device for electrospinning equipment, the array needle device includes bottom plate, sealing element, upper plate, conductive element, needle; The bottom plate is provided with liquid inlet hole, and the spinning solution passes through the liquid inlet hole and enters the upper plate through the corresponding sealing element liquid inlet hole of sealing element, and is sprayed by each needle on the upper plate; In the upper plate, equidistant branch flow channels are provided between the main flow channel from the initial liquid inlet position to each needle liquid inlet, so that the path length of the spinning solution in each region from the main flow channel to the corresponding needle is the same or similar, so that the liquid supply rate of all needles remains consistent; The upper plate is provided with 400-2000 needles per square meter.

[0006] Further, the bottom plate is the basic support structure of the entire array needle device, and the bottom plate is provided with at least one liquid inlet hole; The liquid inlet hole is used to receive the spinning solution from the external supply system; The number and position of the liquid inlet hole can be adjusted according to actual needs to adapt to different spinning solution supply modes.

[0007] Further, the sealing element is arranged between the bottom plate and the upper plate, which plays a sealing role while allowing the spinning solution to pass through the sealing element from the center liquid inlet hole of the bottom plate into the main flow channel of the upper plate.

[0008] Further, the needle heads on the upper plate are in a cross layout, and the distance between the adjacent needle heads is 20-80 mm, so as to reduce the electric field interference between the adjacent needle heads and make the spinning more uniform; the flow channel network of the needle heads in the upper plate is a flow channel network with the same path from the main flow channel to each needle head, so that the spinning solution flowing from the liquid inlet hole can be uniformly distributed to each needle head; so as to ensure smooth liquid flow and no dead angle, and ensure that the liquid supply rates of each needle head are consistent; the layout mode of the array needle heads provided on the upper plate can further expand the number of needle heads and increase the overall output of the device, so as to meet the electrospinning equipment with larger capacity demand.

[0009] Further, the conductive part is installed at the liquid inlet hole position of the bottom plate, and the conductive part is electrically connected with the high-voltage wire of the equipment, so that the spinning solution carries a positive high voltage when passing through the conductive part; so as to provide the required electric field force for the spinning.

[0010] Further, the needle head is a metal needle head or an alloy needle head, which is installed on the upper plate in a threaded assembly mode, and the inner hole diameter of the needle head is 0.4-0.8 mm; further, the needle head material is selected from a metal or an alloy with good electrical conductivity and chemical corrosion resistance, and the threaded assembly is a detachable threaded connection mode, which is convenient for repeated use and reduces the cost.

[0011] Further, the path length of the spinning solution in each area from the main flow channel to the corresponding needle head is the same or similar, and the path length error is less than or equal to 0.5 mm.

[0012] Further, the upper plate and the bottom plate are both made of an insulating material with high mechanical properties, such as PEEK or PI, and the high-voltage electricity is introduced into the spinning solution through the conductive part, so that the needle tip point of the spinning solution when ejected from the needle head is the point with the strongest electric field force, which effectively avoids the problems of uneven electric field distribution and poor spinning effect caused by using a metal liquid outlet needle plate.

[0013] Due to the use of the above technical scheme, the utility model has the following advantages compared with the prior art:

[0014] 1. The utility model ensures that the liquid supply path length from the main flow channel to the needle head is the same or similar through the careful design of the flow channel layout, so that the outlet pressure of each needle head is consistent, thereby realizing consistent liquid supply rate.

[0015] 2. The needle heads of the utility model are in a cross layout and maintain appropriate spacing, which not only effectively reduces the electric field interference between the adjacent needle heads, but also promotes more uniform spinning effect.

[0016] 3. The layout mode of the array needle heads of the utility model can further expand the number of needle heads and increase the overall output of the device, so as to meet the electrospinning equipment with larger capacity demand.

[0017] 4, the utility model discloses that the upper plate and bottom plate all adopt the insulating material of high mechanical property and process, such as PEEK or PI etc., and the high voltage electricity is introduced into the spinning solution through the electrically conductive part, so that the needle tip point when the spinning solution sprays from the needle is the point of the strongest electric field force, effectively avoid the problem of uneven electric field distribution and poor spinning effect brought by using metal liquid outlet needle plate;

[0018] 5, the utility model discloses the efficient scale production has been realized, and this novel array needle device provides strong support for the development of electrospinning technology, and also brings new solution for the related industry. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is array needle device structure diagram of the utility model embodiment 1;

[0020] Fig. 2 It is array needle device sectional view of the utility model embodiment 1;

[0021] Fig. 3 It is array needle flow channel structure diagram of the utility model embodiment 1;

[0022] Wherein, 11-bottom plate, 12-seal, 13-upper plate, 14-needle, 15-conductive part, 110-bottom plate transverse liquid inlet hole, 111-bottom plate longitudinal liquid inlet hole, 112-seal liquid inlet opening, 201-main flow channel, 202-branch flow channel, 203-needle liquid inlet. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model will be further described in detail below in conjunction with the drawings and specific embodiments, these drawings are all simplified schematic diagrams, just with the schematic way of description of the basic structure of the utility model, therefore it just shows the constitution related to the utility model, it is need to explain that, in the case of no conflict, the embodiment in the application and the feature in the embodiment can be combined mutually.

[0024] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the protection scope of the utility model is not limited by the following disclosed specific embodiments.

[0025] Embodiment 1

[0026] As attached Figs. 1-3As shown, the embodiment provides an array needle device for electrospinning equipment, which comprises a bottom plate 11, a sealing member 12, an upper plate 13, a conductive member 15, and a needle 14. The bottom plate is provided with a liquid inlet hole through which the spinning liquid passes through the corresponding sealing member liquid inlet hole 112 of the sealing member, enters the upper plate, and is sprayed out of each needle on the upper plate. In the upper plate, equidistant branch flow channels 202 are arranged between the main flow channel 201 from the liquid inlet initial position and the liquid inlet port 203 of each needle, so that the path length of the spinning liquid in each area from the main flow channel to the corresponding needle is the same, and the liquid supply rate of all needles is consistent. The upper plate is provided with 1000 needles per square meter.

[0027] Further, the bottom plate is the basic support structure of the entire array needle device, and the bottom plate is provided with a plurality of liquid inlet holes, including a bottom plate transverse liquid inlet hole 110 and a bottom plate longitudinal liquid inlet hole 111. The liquid inlet hole is used to receive the spinning liquid from the external supply system. The number and position of the liquid inlet hole can be adjusted according to actual needs to adapt to different spinning liquid supply modes.

[0028] Further, the sealing member is arranged between the bottom plate and the upper plate, which plays a sealing role while allowing the spinning liquid to pass through the sealing member from the center liquid inlet hole of the bottom plate into the main flow channel of the upper plate.

[0029] Further, the needles on the upper plate are arranged in a cross layout, and the distance between the adjacent needles is 25mm, so as to reduce the electric field interference between the adjacent needles and make the spinning more uniform. The flow channel network of the needles inside the upper plate is a flow channel network with the same path from the main flow channel to each needle, so that the spinning liquid flowing from the liquid inlet hole can be uniformly distributed to each needle. This ensures smooth liquid flow and no dead angle, and ensures that the liquid supply rate of each needle is consistent. The layout mode of the array needles provided on the upper plate can further expand the number of needles and increase the overall output of the device to meet the demand for larger capacity of the electrospinning equipment.

[0030] Further, the conductive member is installed at the liquid inlet hole position of the bottom plate, and the conductive member is electrically connected with the high-voltage wire of the equipment, so that the spinning liquid carries a positive high voltage when passing through the conductive member. This provides the required electric field force for spinning;

[0031] Further, the needle is a metal needle, which is installed on the upper plate by threaded assembly, and the inner hole diameter of the needle is 0.6mm. Further, the needle material is selected from a metal with good electrical conductivity and chemical corrosion resistance, and the threaded assembly is a detachable threaded connection mode, which is convenient for repeated use and reduces the cost.

[0032] Further, the upper plate and the bottom plate are both made of PEEK insulating material with high mechanical properties, high voltage electricity is introduced into the spinning solution through the conductive part, so that the needle tip point when the spinning solution is sprayed from the needle is the point with the strongest electric field force, effectively avoiding the problem of uneven electric field distribution and poor spinning effect caused by using metal liquid outlet needle plate.

[0033] In summary, the present application ensures that the liquid supply path length from the main flow channel to the needle is equal through the careful design of the flow channel layout, so that the outlet pressure of each needle is consistent, thereby realizing consistent liquid supply rate; the needles are arranged in a cross layout and maintain appropriate spacing, not only effectively reducing the electric field interference that may occur between adjacent needles, but also promoting more uniform spinning effect; the layout mode of the array needle of the present application can further expand the number of needles and increase the overall output of the device to meet the demand for larger capacity of the electrospinning equipment; the upper plate and the bottom plate of the present application are both made of insulating material with high mechanical properties, such as PEEK or PI, high voltage electricity is introduced into the spinning solution through the conductive part, so that the needle tip point when the spinning solution is sprayed from the needle is the point with the strongest electric field force, effectively avoiding the problem of uneven electric field distribution and poor spinning effect caused by using metal liquid outlet needle plate.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the above-described embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An arrayed needle head device for an electrospinning apparatus, characterized by, The array needle device comprises a bottom plate, a sealing element, an upper plate, a conductive element and a needle; the bottom plate is provided with a liquid inlet hole through which the spinning solution passes the corresponding sealing element liquid inlet hole of the sealing element to enter the upper plate and is sprayed out by each needle on the upper plate; in the upper plate, equidistant branch flow channels are arranged between the main flow channel from the liquid inlet initial position and the liquid inlet holes of each needle, so that the path length of the spinning solution in each area from the main flow channel to the corresponding needle is the same or similar; the upper plate is provided with 400-2000 needles per square meter.

2. An arrayed needle head device for an electrospinning apparatus as claimed in claim 1, wherein, The bottom plate is the basic support structure of the entire array needle device, and the bottom plate is provided with at least one liquid inlet hole.

3. An arrayed needle head device for an electrospinning apparatus as claimed in claim 1, wherein, The sealing element is arranged between the bottom plate and the upper plate, and the spinning solution passes through the sealing element from the center liquid inlet hole of the bottom plate to enter the main flow channel of the upper plate.

4. An arrayed needle head device for an electrospinning apparatus as claimed in claim 1, wherein, The needles on the upper plate are arranged in a cross layout, and the spacing between the adjacent needles is 20-80 mm; the flow channel network of the internal needles of the upper plate is a flow channel network with the same path from the main flow channel to each needle, so that the spinning solution flowing from the liquid inlet hole can be uniformly distributed to each needle.

5. An arrayed needle head device for an electrospinning apparatus as claimed in claim 1, wherein, The conductive element is installed at the liquid inlet hole position of the bottom plate, and the conductive element is electrically connected with the high-voltage wire of the equipment, so that the spinning solution carries a positive high voltage when passing through the conductive element.

6. An arrayed needle head device for an electrospinning apparatus as claimed in claim 1, wherein, The needle is a metal needle or an alloy needle, which is installed on the upper plate by a threaded assembly method, and the inner hole diameter of the needle is 0.4-0.8 mm.

7. An arrayed needle head device for an electrospinning apparatus as claimed in claim 1, wherein, The path length of the spinning solution in each area from the main flow channel to the corresponding needle is the same or similar, and the path length error is less than or equal to 0.5 mm.

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