Fiber membrane production apparatus

Abstract

The fiber membrane production equipment provided by the application comprises a feeding module, an array type spinning electrode module, a receiving module, a partition voltage regulation module, a detection module and a control module. The feeding module is used for delivering spinning liquid to the array type spinning electrode module. The array type spinning electrode module comprises a plurality of spinning electrode groups, which respectively spray polymer jets to different spinning partitions along the width direction. The receiving module is used for receiving the polymer jets and depositing to form a fiber membrane. The partition voltage regulation module comprises a plurality of independent high-voltage output channels, which are respectively connected in one-to-one correspondence with the plurality of spinning electrode groups. The detection module comprises a plurality of thickness detection units, which are used for detecting the deposition thickness of the fiber membrane in each spinning partition in one-to-one correspondence. The control module independently regulates the output voltage of the high-voltage output channel according to the thickness detection data, so as to adjust the deposition thickness of the fiber membrane in each spinning partition, so as to achieve the effect of uniform thickness along the width direction.

Description

Technical Field

[0001] This invention relates to the field of electrospinning technology, and more particularly to a fiber membrane production equipment. Background Technology

[0002] Electrospinning is an important method for preparing continuous fiber membranes ranging from nanometer to micrometer scale, and it has been widely used in filtration, separation, biomedicine, and energy storage. As this technology advances towards industrial-scale production, ensuring the uniformity of fiber membrane thickness in the width direction during wide-width, long-term continuous spinning has become a core issue restricting product quality improvement.

[0003] Currently, the main approaches to increasing yield include array-type multi-needle structures and needle-free rotating electrode structures. However, both methods face the prominent problem of uneven film thickness distribution along the width direction during scale-up. For array-type multi-needle structures, adjacent nozzles generate significant electric field coupling effects in a high-voltage electrostatic field, resulting in a non-uniform distribution of electric field intensity at the nozzle tips along the width direction. Differences in jet stretching and deposition points between different nozzles lead to film thickness stripes and fiber diameter fluctuations on the receiving substrate, corresponding to the nozzle arrangement period. For needle-free rotating electrode structures, the jet initiation position, quantity, and stability are highly dependent on the consistency of liquid film thickness and the uniformity of electric field distribution in the spinning zone. In actual production, due to uneven liquid film thickness, electrode edge effects, and space charge effects, the electric field intensity often exhibits a gradient distribution along the width direction, leading to local differences in jet density and deposition efficiency, resulting in thinner fiber films at the edges, thicker films in the middle, or irregular fluctuations.

[0004] To address the aforementioned issues, existing technologies attempt to optimize the field by adjusting global parameters such as total voltage, receiving distance, or overall liquid supply rate. However, due to the varying degrees of electric field interference and deposition deviation directions at different locations, uniform global adjustment cannot simultaneously meet the balance requirements of all areas. Often, compensation in one area exacerbates the deviation in another. Although some solutions involve adding shielding rings or auxiliary electrodes to improve the electric field distribution, these passive compensation methods cannot adapt to dynamic changes such as liquid level fluctuations and environmental temperature and humidity drift during spinning, making it difficult to achieve real-time, active uniformity control.

[0005] In summary, existing electrospinning equipment lacks an effective means to sense the deposition status at each position in the width direction in real time and perform active, zoned compensation accordingly during large-scale scaling. The problem of uneven film thickness distribution has persisted for a long time, becoming a technical bottleneck restricting the continuous production of high-quality fiber membranes. Summary of the Invention

[0006] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides a fiber membrane production apparatus designed to address the problem in related technologies where, during scale-up production of array-type multi-needle electrospinning equipment, electric field coupling interference occurs between adjacent nozzles, leading to uneven distribution of electric field intensity at the nozzle tips along the width direction, ultimately causing thickness stripes on the fiber membrane on the receiving substrate.

[0007] This invention provides a fiber membrane production apparatus, comprising: The feeding module is used to store and transport spinning solution; An array-type spinning electrode module, connected to the feeding module, is used to form a polymer jet from the spinning solution under the action of an electric field. The array-type spinning electrode module includes multiple spinning electrode groups arranged along the width direction, and each spinning electrode group covers an independent spinning zone. A receiving module, disposed on one side of the arrayed spinning electrode module, is used to receive the polymer jet and deposit it to form a fiber membrane; The partition voltage regulation module includes multiple independently adjustable high-voltage output channels, each of which is connected to a corresponding set of spinning electrode groups. The partition voltage regulation module is used to establish a high-voltage electrostatic field between each of the spinning electrode groups and the substrate of the receiving module. The detection module includes multiple thickness detection units arranged at intervals along the width direction. Each thickness detection unit corresponds one-to-one with the position of each spinning electrode group in the width direction, so as to collect the fiber film deposition thickness value in the corresponding spinning zone. The control module is electrically connected to each of the thickness detection units and each of the high-voltage output channels. Based on the fiber film deposition thickness value in each of the spinning zones fed back by each of the thickness detection units, the control module independently adjusts the electric field of the corresponding spinning electrode group to compensate for the fiber film deposition thickness deviation of each spinning electrode group, so that the thickness of the fiber film in the width direction tends to be uniform.

[0008] According to the fiber membrane production equipment provided by the present invention, an insulating isolation element and a field equalization electrode are further provided between two adjacent sets of spinning electrode groups.

[0009] According to the fiber membrane production equipment provided by the present invention, each of the spinning electrode groups includes at least one of a plurality of needle nozzles, a plurality of solid needle electrodes, a plurality of wire electrodes, and a plurality of groove electrodes.

[0010] The fiber membrane production equipment provided by the present invention further includes an environmental control module, which is disposed in the production space. The environmental control module includes a temperature control unit, a humidity control unit, and a laminar airflow control unit. The angle between the airflow direction of the laminar airflow control unit and the receiving surface of the substrate is 0° to 90°. The temperature control unit, the humidity control unit, and the laminar airflow control unit are all electrically connected to the control module.

[0011] The fiber membrane production equipment provided by the present invention further includes a solvent recovery module, which includes an exhaust hood, a condenser recovery unit and an adsorption purifier connected in sequence, and the exhaust hood is located above the production area.

[0012] According to the fiber membrane production equipment provided by the present invention, the control module is provided with a thickness comparison unit, the thickness comparison unit stores a thickness threshold, the thickness comparison unit is used to compare the thickness data detected by each thickness detection unit with the thickness threshold, and when a certain thickness data is greater than the maximum value of the thickness threshold or lower than the minimum value of the thickness threshold, an electric field adjustment signal is output to the corresponding high voltage output channel.

[0013] According to the fiber membrane production equipment provided by the present invention, the detection module further includes multiple current detection units, which are connected in series between the spinning electrode group and the corresponding high-voltage output channel. The control module is also provided with a current comparison unit, which is electrically connected to the current detection units. The current comparison unit stores a current threshold and is used to compare the current data detected by each current detection unit with the current threshold. When a current data is greater than the maximum value of the current threshold or less than the minimum value of the current threshold, a voltage regulation signal is output to the corresponding high-voltage output channel.

[0014] According to the fiber membrane production equipment provided by the present invention, the detection module further includes an image acquisition unit, and the control module is further provided with a diameter comparison unit. The diameter comparison unit stores the diameter threshold of the fiber filaments. The image acquisition unit is electrically connected to the diameter comparison unit. The image acquisition unit is used to acquire images of the fiber membrane in each of the spinning zones and output the diameter data of the fiber filaments of the fiber membrane. The diameter comparison unit is used to compare the diameter data corresponding to each of the spinning zones with the diameter threshold. When the diameter data in a certain spinning zone is greater than the maximum value of the diameter threshold or less than the minimum value of the diameter threshold, a voltage regulation signal is output to the corresponding high-voltage output channel.

[0015] According to the fiber membrane production equipment provided by the present invention, the feeding module includes a storage tank, a filter, a degassing unit, a metering pump, a pressure sensor, and a return pipeline. The storage tank, the filter, the degassing unit, the metering pump, and the array-type spinning electrode module are connected in sequence. The pressure sensor is located at the outlet of the metering pump, and the return pipeline is located downstream of the metering pump and between the storage tank.

[0016] According to the fiber membrane production equipment provided by the present invention, the receiving module includes an unwinding mechanism, a conductive receiving roller, a tension control mechanism, a hot-pressing shaping roller, and a winding mechanism. The winding mechanism winds up a substrate, which sequentially passes around the conductive receiving roller, the tension control mechanism, and the hot-pressing shaping roller before being wound onto the winding mechanism.

[0017] The present invention has the following advantages due to the adoption of the above technical solutions: The array-type spinning electrode module of the fiber membrane production equipment provided by this invention includes multiple spinning electrode groups distributed along the width direction. Each spinning electrode group is responsible for spraying polymer jets onto different spinning zones. The zone voltage control module includes multiple independent high-voltage output channels, which are connected one-to-one with the multiple spinning electrode groups. When the electric field of the spinning electrode group corresponding to a certain zone is independently adjusted, it will not significantly interfere with the electric field distribution of other areas, thus laying the structural foundation for subsequent precise zone control. The fiber membrane production equipment provided by this invention has multiple thickness detection units that correspond one-to-one with the positions of each spinning electrode group in the width direction, and collect the fiber membrane deposition thickness value of the spinning zone responsible for the corresponding spinning electrode group. The control module independently adjusts the electric field of each spinning electrode group based on the fiber membrane deposition thickness value in the corresponding spinning zone fed back by each thickness detection unit. When the fiber membrane deposition thickness in the spinning zone corresponding to a certain spinning electrode group is lower than the target value, the control module can individually increase the high-voltage power output of that spinning electrode group to enhance the electric field strength in that area, thereby increasing jet stretching and deposition. When the fiber membrane deposition thickness in a certain spinning zone is higher than the target value, the voltage of that spinning electrode group can be individually reduced to decrease the deposition. Since the voltage of each spinning electrode group is independently adjustable, the control module can perform differentiated compensation for the thickness deviation of different spinning zones, overcoming the defect that traditional global voltage regulation compensation methods will further aggravate regional thickness deviations. In the fiber membrane production equipment provided by this invention, the spinning electrode groups are independently set up in zones, providing independently controllable execution units. The thickness detection units provide accurate feedback signals through one-to-one detection, and the zoned voltage regulation provides differentiated compensation methods. Together, these three constitute a complete closed loop of zoned detection, zoned judgment, and zoned execution, ultimately making the thickness of the fiber membrane on the receiving substrate tend to be uniform in the width direction, effectively solving the problem of film thickness stripes caused by interference from adjacent jet electric fields in the prior art. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a fiber membrane production equipment provided in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the working principle of an array-type spinning electrode module provided in an embodiment of the present invention; Figure 3 This is a partially enlarged view of the working principle of an array-type spinning electrode module provided in an embodiment of the present invention; Figure 4 A schematic diagram of the receiving module structure provided in an embodiment of the present invention; Figure 5 This is a signal flow diagram of a control module provided in an embodiment of the present invention.

[0020] Figure label: 100: Feeding module; 110: Storage tank; 120: Filter; 130: Degassing unit; 140: Metering pump; 150: Pressure sensor; 160: Return pipeline; 200: Arrayed spinning electrode module; 210: Spinning electrode assembly; 220: Nozzle; 230: Insulating isolation component; 240: Mitigation electrode; 300: Receiving module; 310: Unwinding mechanism; 320: Conductive receiving roller; 330: Tension control mechanism; 340: Hot pressing shaping roller; 350: Rewinding mechanism; 360: Substrate; 400 500: Zoned voltage control module; 510: Detection module; 520: Thickness detection unit; 530: Current detection unit; 600: Image acquisition unit; 610: Control module; 620: Thickness comparison unit; 630: Current comparison unit; 630: Diameter comparison unit; 700: Environmental control module; 710: Temperature control unit; 720: Humidity control unit; 730: Laminar flow control unit; 800: Solvent recovery module; 810: Exhaust hood; 820: Condensation recovery unit; 830: Adsorption purifier. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "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 accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] The fiber membrane production equipment provided by this invention includes a feeding module, an array-type spinning electrode module, a receiving module, a zoned voltage regulation module, a detection module, and a control module. The feeding module supplies spinning solution to the array-type spinning electrode module, which includes multiple spinning electrode groups that spray polymer jets into different spinning zones along the width direction. The receiving module receives the polymer jets and deposits them to form a fiber membrane. The zoned voltage regulation module includes multiple independent high-voltage output channels, each connected to one of the multiple spinning electrode groups. The detection module includes multiple thickness detection units for detecting the fiber membrane deposition thickness in each spinning zone. The control module independently regulates the output voltage of the high-voltage output channels based on the thickness detection data to adjust the fiber membrane deposition thickness in each spinning zone, achieving uniform thickness along the width direction.

[0028] The following is combined Figures 1 to 5 The fiber membrane production equipment of the present invention is described.

[0029] An embodiment of the present invention provides a fiber membrane production device, including a feeding module 100, an array-type spinning electrode module 200, a receiving module 300, a zoned voltage regulation module 400, a detection module 500, and a control module 600.

[0030] The feeding module 100 is used to store and transport spinning solution. The feeding module 100 includes a storage tank 110, a filter 120, a degassing unit 130, a metering pump 140, a pressure sensor 150, and a return pipeline 160.

[0031] During the liquid supply process, the spinning solution is drawn from the storage tank 110, flows sequentially through the filter 120 for impurity removal, and then through the degassing unit 130 to remove air bubbles before entering the metering pump 140. The metering pump 140 delivers the solution to each spinning electrode group 210 at a set flow rate. The pressure sensor 150 monitors the pipeline pressure in real time and feeds the signal back to the control module 600. The control module 600 works with the metering pump 140 to achieve constant pressure or constant flow liquid supply. Unused spinning solution at the end of the supply pipeline returns to the storage tank 110 via the return pipeline 160, achieving recycling.

[0032] The array-type spinning electrode module 200 includes multiple spinning electrode groups 210, which are arranged along the width direction. Each spinning electrode group 210 constitutes an independent spinning zone. Each spinning electrode group 210 is connected to the feeding module 100 to receive the spinning liquid supplied by the feeding module 100 and form a polymer jet under the action of an electric field.

[0033] The receiving module 300 is located on one side of the array spinning process and is used to receive the polymer jet and deposit it to form a fiber membrane.

[0034] Specifically, the receiving module 300 may include an unwinding mechanism 310, a conductive receiving roller 320, a tension control mechanism 330, a hot-pressing shaping roller 340, and a winding mechanism 350.

[0035] During the production process, the rolled substrate 360 ​​is first installed on the unwinding mechanism 310. The free end of the substrate 360 ​​is then manually threaded around the conductive receiving roller 320, the tension control mechanism 330, and the hot-pressing shaping roller 340 in sequence according to a predetermined path, and finally fixed on the winding mechanism 350 to complete the threading operation.

[0036] After the equipment is started, the unwinding mechanism 310 releases the substrate 360 ​​at a set tension. The substrate 360 ​​moves forward at a constant linear speed under the action of traction force. When the substrate 360 ​​reaches the surface of the conductive receiving roller 320, the high-voltage electric field causes the polymer jet sprayed by the array spinning electrode module 200 to deposit on the surface of the conductive receiving roller 320, forming a continuous fiber film. During this process, the substrate 360 ​​on the surface of the conductive receiving roller 320 moves forward continuously, and the fiber film is continuously deposited and accumulated on the surface of the substrate 360, forming a fiber film layer with a certain thickness.

[0037] After the substrate 360 ​​with the fiber membrane is drawn out from the conductive receiving roller 320, it enters the tension control mechanism 330. The tension detection roller of the tension control mechanism 330 detects the tension value of the substrate 360 ​​in real time and feeds it back to the control module 600. The control module 600 adjusts the speed of the winding drive motor or the braking torque of the unwinding mechanism 310 accordingly to ensure that the tension of the substrate 360 ​​is constant during subsequent hot pressing and winding, and to avoid tearing or wrinkling of the fiber membrane due to tension fluctuations.

[0038] Subsequently, the substrate 360 ​​enters the hot-pressing and shaping roller 340. Under the heat conduction of the heating roller and the pressure of the back pressure roller, the residual solvent in the fiber membrane further evaporates, and moderate melting and bonding occur between the fibers, thereby improving the structural stability of the fiber membrane and enhancing the adhesion between the fiber membrane and the substrate 360.

[0039] Finally, the composite fiber membrane, consisting of the substrate 360 ​​and the fiber membrane after hot pressing and shaping, is continuously wound up by the winding mechanism 350. With the assistance of the winding pressure roller, a finished roll with neat end faces is formed, completing the entire process of continuous receiving, shaping and collecting of the fiber membrane.

[0040] The array-type spinning electrode module 200 may include twelve spinning electrode groups 210, each of which includes three nozzles 220. Taking the substrate 360 ​​being horizontally transported from left to right as an example, the twelve spinning electrode groups 210 are distributed along the front-back direction, and the three nozzles 220 in each group are also distributed along the front-back direction, that is, thirty-six nozzles 220 are distributed in a straight line along the front-back direction. Every three nozzles 220 cover an independent spinning zone, for a total of twelve spinning zones, and the boundaries of adjacent spinning zones coincide.

[0041] The aforementioned nozzle 220 can be a needle nozzle 220, a solid needle electrode, a wire electrode, or a slotted electrode.

[0042] The zoned voltage regulation module 400 includes multiple independently adjustable high-voltage output channels, each connected to a corresponding group of spinning electrode groups 210, to individually regulate the voltage of each corresponding spinning electrode group 210. The zoned voltage regulation module 400 is used to establish a high-voltage electrostatic field between each spinning electrode group 210 and the substrate 360 ​​of the receiving module 300.

[0043] The detection module 500 includes a plurality of thickness detection units 510 arranged at intervals along the width direction, such as thickness sensors. Each thickness sensor is configured in a one-to-one correspondence with a plurality of spinning electrode groups 210 to obtain the fiber film deposition thickness value in the spinning zone covered by each spinning electrode group 210.

[0044] The control module 600 is electrically connected to each thickness detection unit 510 and each high-voltage output channel. Based on the fiber membrane deposition thickness values ​​within each spinning zone fed back by each thickness detection unit 510, the control module 600 independently adjusts the electric field of the corresponding spinning electrode group 210, that is, adjusts the output voltage value of the corresponding high-voltage output channel, thereby compensating for the fiber membrane deposition thickness in the corresponding spinning zone and ensuring uniform thickness of the fiber membrane in the width direction.

[0045] In some embodiments, an insulating isolator 230 and a field equalization electrode 240 are provided between two adjacent spinning electrode groups 210 to reduce mutual interference between the jets from the multiple nozzles 220 and improve film thickness uniformity and yield.

[0046] Specifically, when each spinning electrode group 210 adjusts its voltage independently, a potential difference inevitably exists between adjacent spinning electrode groups 210. If the electric field distribution between the two groups undergoes a drastic jump or distortion, the jet in the interface region will be subjected to an unbalanced electric field force, causing the jet trajectory to deflect towards the side with higher voltage, resulting in overlapping deposition areas or blank zones.

[0047] The setting of the averaging electrode 240 can provide an intermediate potential reference surface between adjacent spinning electrode groups 210. Through its own charge redistribution, it can smoothly transition the electric field generated by the spinning electrode groups 210 on both sides, eliminate the abrupt change in electric field gradient, and make the electric field lines in the boundary region tend to be perpendicular and parallel, thereby ensuring that the jet's motion path in this region is stable and does not deviate.

[0048] The insulating isolator 230 physically separates adjacent spinning electrode groups 210, forming a clear boundary between the spinning electrode groups 210. This confines the jets generated by each spinning electrode group 210 within its respective spinning zone. Combined with the electrical shielding effect of the averaging electrode 240, the insulating isolator 230 further eliminates the possibility of jets crossing the zone boundary from a physical structural perspective, ensuring that the deposition areas of each spinning electrode group 210 do not overlap or interfere with each other.

[0049] In some embodiments, the fiber membrane production equipment further includes an environmental control module 700, which is disposed within the production space and specifically includes a temperature control unit 710, a humidity control unit 720, and a laminar airflow control unit 730. The temperature control unit 710, humidity control unit 720, and laminar airflow control unit 730 are all electrically connected to the control module 600. The control module 600 can adjust the temperature of the production space by controlling the temperature control unit 710, adjust the humidity within the production space by controlling the humidity control unit 720, and adjust the flow angle of the laminar airflow by controlling the laminar airflow control unit 730. This angle can be any value between 0° and 90°.

[0050] In some embodiments, the fiber membrane production equipment further includes a solvent recovery module 800, comprising an exhaust hood 810, a condenser recovery unit 820, and an adsorption purifier 830 connected in sequence, with the exhaust hood 810 located above the production area.

[0051] In some embodiments, the control module 600 includes a thickness comparison unit 610, which stores a thickness threshold, i.e., a thickness value range formed by the maximum and minimum values ​​of the fiber membrane deposition thickness. The thickness comparison unit 610 is used to compare the thickness data detected by each thickness detection unit 510 in a single acquisition with the thickness threshold.

[0052] When the thickness data corresponding to a certain spinning zone is greater than the maximum value of the thickness threshold or less than the minimum value of the thickness threshold, the thickness comparison unit 610 outputs an electric field adjustment signal to the corresponding high-voltage output channel, thereby adjusting the electric field strength between the corresponding spinning electrode group 210 and the conductive receiving roller 320.

[0053] In some embodiments, the detection module 500 further includes a plurality of current detection units 520, which are connected in series between each spinning electrode group 210 and the high voltage output channel. The current detection units 520 are used to detect the current value flowing through the corresponding spinning electrode group 210.

[0054] The control module 600 is equipped with a current comparison unit 620. Each current detection unit 520 is connected to the current comparison unit 620. The current comparison unit 620 stores a current threshold. When the current value corresponding to a certain spinning zone is greater than the maximum value of the current threshold or less than the minimum value of the current threshold, the current comparison unit 620 outputs an electric field adjustment signal to the corresponding high voltage output channel to change the current of the corresponding spinning electrode group 210, thereby adjusting the electric field strength between the corresponding spinning electrode group 210 and the conductive receiving roller 320.

[0055] In some embodiments, the detection module 500 further includes an image acquisition unit 530, which is used to acquire images of the fiber membrane in each spinning zone, thereby obtaining the diameter data of the fiber filaments of the fiber membrane.

[0056] The control module 600 includes a diameter comparison unit 630, which is electrically connected to the image acquisition unit 530. The diameter comparison unit 630 stores fiber diameter thresholds. When the diameter of a fiber corresponding to a certain spinning zone is greater than the maximum value of the diameter threshold or less than the minimum value, the diameter comparison unit 630 outputs an electric field adjustment signal to the corresponding high-voltage output channel to adjust the electric field strength between the corresponding spinning electrode group 210 and the conductive receiving roller 320, thereby changing the diameter of the fiber in the corresponding spinning zone.

[0057] Of course, when the thickness data, current data, and diameter data exceed their respective thresholds, the control module can also adjust parameters such as liquid supply pressure, substrate moving speed, temperature, humidity, and airflow direction to bring the corresponding data back to normal values.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fiber membrane production equipment, characterized in that, include: The feeding module (100) is used to store and transport spinning solution; An array-type spinning electrode module (200) is connected to the feeding module (100) and is used to form a polymer jet from the spinning solution under the action of an electric field. The array-type spinning electrode module (200) includes multiple spinning electrode groups (210) arranged along the width direction, and each spinning electrode group (210) covers an independent spinning zone. A receiving module (300) is disposed on one side of the arrayed spinning electrode module (200) for receiving the polymer jet and depositing it to form a fiber membrane; The partition voltage control module (400) includes multiple independently adjustable high voltage output channels, and the multiple high voltage output channels are respectively connected to multiple sets of spinning electrode groups (210). The partition voltage control module (400) is used to establish a high voltage electrostatic field between each of the spinning electrode groups (210) and the substrate (360) of the receiving module (300). The detection module (500) includes a plurality of thickness detection units (510) arranged at intervals along the width direction. Each thickness detection unit (510) corresponds to the position of each spinning electrode group (210) in the width direction to collect the fiber film deposition thickness value in the corresponding spinning partition. The control module (600) is electrically connected to each of the thickness detection units (510) and each of the high voltage output channels. The control module (600) adjusts the electric field of the corresponding spinning electrode group (210) independently according to the fiber film deposition thickness value fed back by each of the thickness detection units (510) in each of the spinning zones, so as to compensate for the fiber film deposition thickness deviation of each of the spinning electrode groups (210) and make the thickness of the fiber film in the width direction tend to be uniform.

2. The fiber membrane production equipment according to claim 1, characterized in that, An insulating separator (230) and a field equalization electrode (240) are also provided between two adjacent spinning electrode groups (210).

3. The fiber membrane production equipment according to claim 1, characterized in that, Each of the said spinning electrode groups (210) includes at least one of a plurality of needle nozzles (220), a plurality of solid needle electrodes, a plurality of wire electrodes, and a plurality of groove electrodes.

4. The fiber membrane production equipment according to claim 1, characterized in that, It also includes an environmental control module (700), which is set in the production space. The environmental control module (700) includes a temperature control unit (710), a humidity control unit (720), and a laminar airflow control unit (730). The angle between the airflow direction of the laminar airflow control unit (730) and the receiving surface of the substrate (360) is 0°~90°. The temperature control unit (710), the humidity control unit (720), and the laminar airflow control unit (730) are all electrically connected to the control module (600).

5. The fiber membrane production equipment according to claim 1, characterized in that, It also includes a solvent recovery module (800), which includes an exhaust hood (810), a condenser recovery unit (820) and an adsorption purifier (830) connected in sequence, with the exhaust hood (810) located above the production area.

6. The fiber membrane production equipment according to claim 1, characterized in that, The control module (600) is provided with a thickness comparison unit (610), which stores a thickness threshold. The thickness comparison unit (610) is used to compare the thickness data detected by each thickness detection unit (510) with the thickness threshold. When a certain thickness data is greater than the maximum value of the thickness threshold or lower than the minimum value of the thickness threshold, an electric field adjustment signal is output to the corresponding high voltage output channel.

7. The fiber membrane production equipment according to claim 1, characterized in that, The detection module (500) further includes multiple current detection units (520), which are connected in series one-to-one between the spinning electrode group (210) and the corresponding high-voltage output channel. The control module (600) is also provided with a current comparison unit (620), which is electrically connected to the current comparison unit (620). The current comparison unit (620) stores a current threshold and is used to compare the current data detected by each current detection unit (520) with the current threshold. When a current data is greater than the maximum value of the current threshold or less than the minimum value of the current threshold, a voltage regulation signal is output to the corresponding high-voltage output channel.

8. The fiber membrane production equipment according to claim 1, characterized in that, The detection module (500) further includes an image acquisition unit (530), and the control module (600) is further provided with a diameter comparison unit (630). The diameter comparison unit (630) stores the diameter threshold of the fiber filament. The image acquisition unit (530) is electrically connected to the diameter comparison unit (630). The image acquisition unit (530) is used to acquire images of the fiber membrane in each of the spinning partitions and output the diameter data of the fiber filament of the fiber membrane. The diameter comparison unit (630) is used to compare the diameter data corresponding to each of the spinning partitions with the diameter threshold. When the diameter data in a certain spinning partition is greater than the maximum value of the diameter threshold or less than the minimum value of the diameter threshold, a voltage regulation signal is output to the corresponding high voltage output channel.

9. The fiber membrane production equipment according to claim 1, characterized in that, The feeding module (100) includes a storage tank (110), a filter (120), a degassing unit (130), a metering pump (140), a pressure sensor (150), and a return pipeline (160). The storage tank (110), the filter (120), the degassing unit (130), the metering pump (140), and the array-type spinning electrode module (200) are connected in sequence. The pressure sensor (150) is located at the outlet of the metering pump (140), and the return pipeline (160) is located downstream of the metering pump (140) and between the storage tank (110).

10. The fiber membrane production equipment according to claim 1, characterized in that, The receiving module (300) includes an unwinding mechanism (310), a conductive receiving roller (320), a tension control mechanism (330), a hot-pressing shaping roller (340), and a winding mechanism (350). The winding mechanism (350) winds up a substrate (360). The substrate (360) passes around the conductive receiving roller (320), the tension control mechanism (330), and the hot-pressing shaping roller (340) in sequence before being wound onto the winding mechanism (350).

Images