A small-scale electrospinning device

Abstract

The utility model discloses a kind of pilot electrospinning equipment, comprising: rack, the inside of outer cover is equipped with working space;Spray head device;Receiving device, it is located just below spray head device;Temperature and humidity control device, it is used to control temperature and humidity in working space;Substrate expansion device, unwinding component and winding component are detachably connected with rack.By electric field generation control device, the voltage size of spinning electric field can be controlled to change, temperature and humidity control device can control to change temperature and humidity in working space;When installing substrate expansion device, fiber can be deposited on substrate;When substrate expansion device is removed, fiber can be directly deposited on receiving device surface.Operating personnel can conveniently flexibly change voltage, humidity, temperature and fiber deposition object when spinning work according to small-batch test condition, meet the demand for electrospinning small-batch production test, reduce the cost of small-batch production test.

Description

Technical Field

[0001] This utility model relates to the field of electrospinning technology, and in particular to a pilot-scale electrospinning device. Background Technology

[0002] Electrospinning is a method for preparing micro- and nano-sized fibers by stretching a polymer solution into micro- and nano-sized fibers under the influence of a high-voltage electric field. This technology has broad application prospects in fields such as filtration materials, biomedicine, and energy storage. Research on electrospinning processes first proceeds to a laboratory stage, where small-scale experiments are conducted to optimize process parameters such as voltage, solution concentration, flow rate, temperature, and humidity to obtain ideal fiber morphology and properties before scaling up to large-scale industrial production. Furthermore, a transitional phase of small-batch production trials is typically required between small-scale laboratory experiments and large-scale industrial production to verify the stability of the production process and the product yield. This phase is crucial for identifying potential problems, adjusting production parameters, and optimizing equipment configuration, effectively reducing the risks and costs of large-scale production.

[0003] However, existing technologies lack dedicated equipment for small-batch production trials of electrospinning. Laboratory equipment typically has low output and limited functionality, failing to meet the continuity and stability requirements of small-batch production. Large-scale industrial equipment, on the other hand, suffers from high investment costs and insufficient flexibility, making it unsuitable for direct use in small-batch process verification. Furthermore, using large-scale equipment for small-batch trials would disrupt normal production. Therefore, those skilled in the art desire a pilot-scale electrospinning device that allows researchers to conduct small-batch production trials between laboratory studies and industrial-scale production, providing reliable support for the large-scale application of electrospinning technology. Utility Model Content

[0004] The main purpose of this invention is to propose a pilot electrospinning device, which aims to solve the technical problem of the lack of equipment for small-batch production testing of electrospinning in the existing technology.

[0005] To achieve the above objectives, this utility model proposes a pilot-scale electrospinning device, comprising:

[0006] A frame, comprising an outer cover located on the upper side, with a working space provided inside the outer cover;

[0007] A nozzle assembly is located within the workspace;

[0008] A receiving device is located within the workspace, and the receiving device is located directly below the nozzle device;

[0009] An electric field generating control device is electrically connected to the nozzle device and the receiving device. The electric field generating control device can generate a spinning electric field between the nozzle device and the receiving device and control the voltage of the spinning electric field. The nozzle device can spray spinning liquid and form fiber filaments deposited on the receiving device under the action of the spinning electric field.

[0010] A temperature and humidity control device, which is connected to the workspace, is used to control the temperature and humidity within the workspace.

[0011] A substrate expansion device includes an unwinding assembly and a winding assembly, both of which are located on the outside of the outer cover. Both the unwinding assembly and the winding assembly are detachably connected to the frame. A receiving device is located between the unwinding assembly and the winding assembly. The outer cover has a substrate through-hole for the substrate to pass through. The unwinding assembly can release the substrate, which passes over the upper side of the receiving device, and then be wound up by the winding assembly.

[0012] The nozzle device sprays spinning solution, which, under the influence of a spinning electric field, forms fine fibers that deposit on the receiving device. The voltage of the spinning electric field can be controlled by an electric field generation control device, and the temperature and humidity within the working space can be controlled by a temperature and humidity control device. Additionally, a detachable substrate expansion device is provided. The unwinding and winding components release and wind the substrate, respectively. When the substrate expansion device is installed, the unwinding component releases the substrate over the top of the receiving device, allowing fibers to deposit on it. The fiber-deposited substrate is then wound up by the winding component. When the substrate expansion device is removed, the fibers can be directly deposited on the surface of the receiving device. By using this pilot electrospinning equipment, operators can easily and flexibly change the voltage, humidity, temperature, and fiber deposition target during spinning operations according to the conditions of small-batch experiments, meeting the needs of small-batch electrospinning production experiments and reducing the cost of such experiments.

[0013] Preferably, the nozzle device includes a lifting drive assembly, a lifting frame, and at least two sets of nozzle assemblies. The lifting drive assembly is connected to the frame, and the lifting frame is connected to the moving end of the lifting drive assembly.

[0014] With the relative direction between the unwinding component and the winding component as the front-back direction, the lifting frame is provided with at least two left and right drive components. All the left and right drive components are arranged along the front-back direction. Multiple nozzle components are connected one-to-one to the moving ends of multiple left and right drive components. The lifting drive component can drive multiple sets of nozzle components to move up and down, and the left and right drive components can drive the corresponding nozzle components to move left and right.

[0015] The lifting drive assembly can drive multiple nozzle assemblies to move up and down synchronously, thereby controlling and changing the distance between the nozzle assemblies and the receiving device. Each nozzle assembly is driven left and right by its own left and right drive assembly, which allows for control over the impact of the movement combination of multiple nozzle assemblies on spinning, increasing the flexibility of small-batch trials.

[0016] Preferably, the receiving device includes a receiving frame connected to the machine frame. The receiving frame has a drive roller and a driven roller, which are spaced apart in a front-to-back direction. A receiving belt is wound around the drive roller and the driven roller. A receiving conductive plate is also fixed to the receiving frame, located on the lower side of the upper section of the receiving belt. The receiving belt on the drive roller and the driven roller can transport deposited fibers or substrates, and a spinning electric field is formed between the receiving conductive plate and the nozzle assembly.

[0017] Preferably, the two electrodes of the electric field generating control device are electrically connected to the nozzle assembly and the receiving conductive plate, respectively; a first insulating member is connected between the nozzle assembly and the moving end of the left and right drive assembly; and a second insulating member is connected between the receiving frame and the frame.

[0018] The first insulating component can insulate the nozzle assembly from the left and right drive assemblies, and the second insulating component can insulate the receiver frame from the frame, so as to prevent the voltage generated by the electric field control device from affecting other structures.

[0019] Preferably, the nozzle assembly includes a mounting bracket, a spinneret holder, and multiple spinnerets. The mounting bracket is connected to the moving end of the left and right drive components. The multiple spinnerets are connected to the spinneret holder. Mounting seats are fixed on both the left and right sides of the mounting bracket. The left side of the spinneret holder is detachably connected to the mounting seat located on the left side, and the right side of the spinneret holder is detachably connected to the mounting seat located on the right side.

[0020] The spinneret is mounted on the mounting frame via a mounting base. The spinneret and the mounting base are detachably connected, allowing for easy replacement of different spinnerets and spinnerets, thus meeting the needs of small-batch testing of different spinnerets and spinnerets.

[0021] Preferably, the mounting base is provided with mounting holes, the left side of the spinneret is inserted into the mounting hole of the mounting base located on the left side and locked by a first locking member, and the right side of the spinneret is inserted into the mounting hole of the mounting base located on the right side and locked by a second locking member.

[0022] The spinneret is inserted into the mounting holes of the mounting bases on both sides. The mounting bases support the spinneret, and the spinneret is locked in place by the first and second locking components, facilitating its installation. Disassembly is also straightforward; simply loosen the first and second locking components and remove the spinneret from the mounting holes.

[0023] Preferably, the pilot electrospinning equipment further includes a liquid supply device, which includes a storage tank for storing the spinning solution. The storage tank is provided with a pressure port and a supply port. The pressure port is located on the upper side of the storage tank, and the supply port is connected to the nozzle device via a supply pipe. The pressure port can add air pressure to the storage tank to supply the spinning solution in the storage tank to the nozzle device through the supply port. The liquid supply device also includes a base, on which a weighing module is provided. The storage tank is located on the weighing module, and the weighing module can detect the weight of the storage tank.

[0024] The storage tank contains spinning solution. Air pressure is introduced into the storage tank through a pressurization port, and the spinning solution is supplied to the nozzle device and ejected into the spinning process under this pressure. A weighing module can weigh the storage tank and the spinning solution within it, thus determining the solution supply rate and the remaining amount of spinning solution in the storage tank.

[0025] Preferably, the temperature and humidity control device includes a humidity control device and a temperature control device; the frame includes a base plate, the working space is located on the upper side of the base plate, the humidity control device is located on the lower side of the base plate, the base plate is provided with an air inlet and an air return hole, the humidity control device is provided with an air outlet and an air extraction port, the air inlet and the air outlet are connected by a pipe, the air return hole and the air extraction port are connected by a pipe, the humidity control device can draw air from the working space through the air return hole and perform humidity control treatment before sending it back into the working space through the air inlet; the temperature control device includes a heating device, the heating device is located in the working space, and the heating device can heat the air in the working space.

[0026] The humidity control device draws air back from the working space through the return air vent, processes it to a constant humidity level, and then reintroduces it into the working space through the air inlet. This cycle maintains the air in the working space at a relatively constant humidity level. Circulating the air in the working space also reduces the processing load of the humidity control device, thus reducing energy consumption. The heating device heats the air in the working space, maintaining it at a relatively constant temperature.

[0027] Preferably, the upper side of the frame is provided with an exhaust port, which communicates with the working space and is used to discharge air from the working space. Corrosive gases may be generated during spinning; the exhaust port allows air from the working space to be discharged, reducing the accumulation of corrosive gases within the equipment and preventing corrosion of components.

[0028] Preferably, the unwinding assembly includes an unwinding base and an unwinding roller. The unwinding base is detachably connected to the frame, and the unwinding roller is rotatably connected to the unwinding base. The winding assembly includes a winding base and a winding roller. The winding base is detachably connected to the frame, and the winding roller is rotatably connected to the winding base. A winding motor is also fixed on the winding base, and the winding motor is drively connected to the winding roller. A substrate roll to be deposited with fibers can be placed on the unwinding roller. The winding motor drives the winding roller to rotate, releasing the substrate roll. The substrate passes over the upper side of the receiving device to deposit fibers and is then conveyed to the winding roller to be wound up. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the pilot electrospinning equipment of this utility model when the substrate spreading device is installed;

[0031] Figure 2 This is a schematic diagram of the small-scale electrospinning equipment of this utility model when the substrate spreading device is removed;

[0032] Figure 3 This is a schematic diagram of the nozzle device and receiving device of this utility model;

[0033] Figure 4 This is a schematic diagram of the nozzle device of this utility model;

[0034] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0035] Figure 6 This is a schematic diagram of the receiving device of this utility model;

[0036] Figure 7 This is a schematic diagram of the receiving device and the substrate expansion device of this utility model;

[0037] Figure 8This is a schematic diagram of the liquid supply device of this utility model;

[0038] Figure 9 This is a schematic diagram of the constant humidity device of this utility model.

[0039] In the attached diagram: 1-Frame, 11-Outer cover, 111-Substrate through hole, 13-Substrate, 131-Air inlet, 132-Air outlet, 14-Exhaust outlet, 2-Nozzle assembly, 21-Lifting drive assembly, 22-Lifting frame, 23-Nozzle assembly, 24-Left and right drive assembly, 25-First insulating component, 26-Mounting frame, 27-Spinneret, 28-Spinneret head, 29-Mounting base, 291-Mounting hole, 3-Receiving device, 31-Receiving frame, 32-Drive roller, 33 - Driven roller, 34- Receiving belt, 35- Receiving conductive plate, 36- Second insulating component, 41- Unwinding assembly, 411- Unwinding seat, 412- Unwinding roller, 42- Rewinding assembly, 421- Rewinding seat, 422- Rewinding roller, 423- Rewinding motor, 5- Liquid supply device, 51- Liquid storage tank, 511- Pressurization hole, 512- Liquid supply hole, 52- Liquid supply pipe, 53- Base, 54- Weighing module, 6- Humidity control device, 61- Air outlet, 62- Air extraction port, 8- Substrate.

[0040] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0042] It should be noted that if the embodiments of this utility model involve directional indicators, such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0044] like Figures 1 to 9 As shown, a pilot-scale electrospinning device includes a frame 1, a nozzle device 2, a receiving device 3, an electric field generation and control device, a temperature and humidity control device, and a substrate expansion device.

[0045] The frame 1 includes an outer cover 11 located on the upper side. A working space is provided inside the outer cover 11. The nozzle device 2 and the receiving device 3 are located in the working space, with the receiving device 3 located directly below the nozzle device 2. The outer cover 11 is provided with a movable door, which can be opened for easy adjustment by the operator, or closed during normal operation to maintain the internal environment of the working space.

[0046] The electric field generating and controlling device is electrically connected to the nozzle device 2 and the receiving device 3. This device enables the formation of a spinning electric field between the nozzle device 2 and the receiving device 3 and controls the voltage of this field. The nozzle device 2 sprays the spinning solution, and under the influence of the spinning electric field, fine fibers are deposited on the receiving device 3. The temperature and humidity controlling device is connected to the working space and is used to control the temperature and humidity within the working space.

[0047] The substrate expansion device includes an unwinding assembly 41 and a winding assembly 42. Both the unwinding assembly 41 and the winding assembly 42 are located on the outside of the outer cover 11. Both the unwinding assembly 41 and the winding assembly 42 are detachably connected to the frame 1. The receiving device 3 is located between the unwinding assembly 41 and the winding assembly 42. The outer cover 11 is provided with a substrate through hole 111 for the substrate 8 to pass through. The unwinding assembly 41 can release the substrate 8, which passes over the upper side of the receiving device 3 and is then wound up by the winding assembly 42.

[0048] The nozzle device 2 sprays spinning solution, which, under the influence of a spinning electric field, forms fine fibers that deposit on the receiving device 3. The voltage of the spinning electric field can be controlled by an electric field generation control device, and the temperature and humidity within the working space can be controlled by a temperature and humidity control device. Additionally, a detachable substrate expansion device is provided. The unwinding assembly 41 and the winding assembly 42 respectively unwind and wind the substrate 8. When the substrate expansion device is installed, refer to... Figure 1The unwinding assembly 41 releases the substrate 8 through the upper side of the receiving device 3, allowing fibers to be deposited on the substrate 8. The fiber-deposited substrate 8 is then wound up by the winding assembly 42. When the substrate extension device is removed, refer to... Figure 2 The fibers can be directly deposited on the surface of the receiving device 3.

[0049] By using this pilot electrospinning equipment, operators can easily and flexibly change the voltage, humidity, temperature, and fiber deposition target during spinning according to the conditions of small-batch tests, thus meeting the needs of small-batch electrospinning production tests and reducing the cost of small-batch production tests.

[0050] In some specific embodiments, reference is made to Figure 3 and Figure 4 The nozzle device 2 includes a lifting drive assembly 21, a lifting frame 22 and at least two sets of nozzle assemblies 23. The lifting drive assembly 21 is connected to the frame 1, and the lifting frame 22 is connected to the moving end of the lifting drive assembly 21.

[0051] With the relative direction of the unwinding assembly 41 and the winding assembly 42 as the front-back direction, the lifting frame 22 is provided with at least two left and right drive assemblies 24. All left and right drive assemblies 24 are arranged in the front-back direction. Multiple nozzle assemblies 23 are connected one-to-one to the moving ends of multiple left and right drive assemblies 24. The lifting drive assembly 21 can drive multiple sets of nozzle assemblies 23 to move up and down, and the left and right drive assemblies 24 can drive the corresponding nozzle assemblies 23 to move left and right.

[0052] The lifting drive assembly 21 can drive multiple sets of nozzle assemblies 23 to move up and down synchronously, thereby controlling and changing the distance between the nozzle assemblies 23 and the receiving device 3. Each set of nozzle assemblies 23 is driven to move left and right by the left and right drive assembly 24, which can control and change the influence of the movement combination of multiple nozzle assemblies 23 on spinning. The movement combination methods, such as synchronous same-direction movement, reverse movement, etc., increase the flexibility of small-batch testing. Preferably, the lifting drive assembly 21 is located above the lifting frame 22 and the nozzle assemblies 23. The lifting drive assembly 21 and the left and right drive assembly 24 can be adopted as a screw motion module or a gear and rack motion module, etc.

[0053] In some specific embodiments, reference is made to Figure 6The receiving device 3 includes a receiving frame 31 connected to the machine frame 1. The receiving frame 31 has a drive roller 32 and a driven roller 33, which are spaced apart in a front-to-back direction. A receiving belt 34 is wound around the drive roller 32 and the driven roller 33. A receiving conductive plate 35 is also fixed to the receiving frame 31, located on the lower side of the upper section of the receiving belt 34. The receiving belt 34 on the drive roller 32 and the driven roller 33 can transport deposited fibers or substrate 8. A spinning electric field is formed between the receiving conductive plate 35 and the nozzle assembly 23. The receiving device 3 also includes a receiving drive motor, which is fixedly connected to the machine frame 1 and driven by the drive roller 32.

[0054] Furthermore, the two electrodes of the electric field generating control device are electrically connected to the nozzle assembly 23 and the receiving conductive plate 35, respectively. A first insulating member 25 is connected between the nozzle assembly 23 and the moving end of the left and right drive assembly 24, and a second insulating member 36 is connected between the receiving frame 31 and the frame 1.

[0055] The positive terminal of the electric field generating control device can be connected to the nozzle assembly 23, and the negative terminal or ground wire of the electric field generating control device can be connected to the receiving conductive plate 35. The first insulating member 25 can insulate the nozzle assembly 23 from the left and right drive assemblies 24, and the second insulating member 36 can insulate the receiving frame 31 from the frame 1, so as to prevent the voltage generated by the electric field generating control device from affecting other structures. The receiving drive motor and the drive roller 32 are insulated from each other, and the insulation between the receiving drive motor and the drive roller 32 can be connected by a synchronous belt.

[0056] In some specific embodiments, reference is made to Figure 4 The nozzle assembly 23 includes a mounting bracket 26, a spinneret 27, and multiple spinnerets 28. The mounting bracket 26 is connected to the moving end of the left and right drive assemblies 24. The multiple spinnerets 28 are connected to the spinneret 27, which has a liquid supply channel. All spinnerets 28 communicate with the liquid supply channel. Mounting seats 29 are fixed on both the left and right sides of the mounting bracket 26. The left side of the spinneret 27 is detachably connected to the mounting seat 29 located on the left side, and the right side of the spinneret 27 is detachably connected to the mounting seat 29 located on the right side.

[0057] The spinneret 27 is mounted on the mounting bracket 26 via the mounting base 29. The spinneret 27 and the mounting base 29 are detachably connected, allowing for easy replacement of different spinnerets 27 and spinnerets 28, thus meeting the needs of small-batch testing of different spinnerets 27 and spinnerets 28.

[0058] Furthermore, referring to Figure 5The mounting base 29 is provided with mounting holes 291. The left side of the spinneret 27 is inserted into the mounting hole 291 of the mounting base 29 on the left side and locked by the first locking member. The right side of the spinneret 27 is inserted into the mounting hole 291 of the mounting base 29 on the right side and locked by the second locking member.

[0059] The spinneret 27 is inserted into the mounting holes 291 of the mounting bases 29 located on both sides. The mounting bases 29 support the spinneret 27, and the spinneret 27 is locked and positioned by the first and second locking members, which facilitates the installation of the spinneret 27. Disassembly is also simple: just loosen the first and second locking members and move the spinneret 27 out of the mounting holes 291. Specifically, the first and second locking members can be screws. The mounting bases 29 have screw holes, and the screws are connected in the screw holes. Turning the screws can press and hold the spinneret 27 in place.

[0060] In some specific embodiments, reference is made to Figure 8 The pilot electrospinning equipment also includes a liquid supply device 5, which includes a storage tank 51 for storing the spinning solution. The storage tank 51 is provided with a pressure port 511 and a liquid supply port 512. The pressure port 511 is located on the upper side of the storage tank 51. The liquid supply port 512 is connected to the nozzle device 2 through a liquid supply pipe 52. The pressure port 511 can add air pressure to the storage tank 51 to supply the spinning solution in the storage tank 51 to the nozzle device 2 through the liquid supply port 512. The liquid supply device 5 also includes a base 53, on which a weighing module 54 is provided. The storage tank 51 is located on the weighing module 54, which can detect the weight of the storage tank 51.

[0061] The storage tank 51 stores the spinning solution. A discharge pipe is located below the supply port 512 and connects to the bottom of the storage tank 51. Air pressure is introduced into the storage tank 51 through the pressurization port 511. Under this pressure, the spinning solution enters the discharge pipe, supply port 512, and supply pipe 52, and is supplied to the nozzle device 2 for spinning. The weighing module 54 can weigh the storage tank 51 and the spinning solution within it, thus determining the solution supply rate and the remaining amount of spinning solution in the storage tank 51. Specifically, the supply pipe 52 can be connected to a distributor, which then distributes the solution to the supply channels within multiple spinnerets 27.

[0062] In some specific embodiments, the temperature and humidity control device includes a humidity control device 6 and a temperature control device; the frame 1 includes a substrate 13, the working space is located on the upper side of the substrate 13, and the humidity control device 6 is located on the lower side of the substrate 13, as shown in the figure. Figure 9The substrate 13 is provided with an air inlet 131 and an air return 132. The humidity control device 6 is provided with an air outlet 61 and an air extraction port 62. The air inlet 131 and the air outlet 61 are connected by a pipe, and the air return 132 and the air extraction port 62 are connected by a pipe. The humidity control device 6 can draw back the air in the working space from the air return 132, perform humidity control treatment, and then send it back into the working space through the air inlet 131. The temperature control device includes a heating device, which is located in the working space and can heat the air in the working space.

[0063] The humidity control device 6 draws air back from the working space through the return air vent 132. After humidity control treatment (either humidification or dehumidification based on humidity levels), the air is then returned to the working space through the air inlet 131. This cycle maintains the air in the working space at a relatively constant humidity level. Circulating the air in the working space also reduces the processing load of the humidity control device 6, thus reducing energy consumption. The humidity control device 6 can use an existing humidity generator. The heating device heats the air in the working space, maintaining it at a relatively constant temperature. The heating device can use electric heating wire or infrared heating.

[0064] Furthermore, an exhaust port 14 is provided on the upper side of the frame 1, which communicates with the working space and is used to exhaust air from the working space. Corrosive gases may be generated during spinning; the exhaust port 14 allows air to be expelled from the working space, reducing the accumulation of corrosive gases within the equipment and preventing corrosion of components. The humidity control device 6 supplies air from the lower side of the working space, while the exhaust port 14 exhausts air from the upper side of the working space, facilitating the removal of corrosive gases. The interior of the humidity control device 6 can be lined with a highly corrosion-resistant material to prevent corrosion.

[0065] In some specific embodiments, reference is made to Figure 7 The unwinding assembly 41 includes an unwinding seat 411 and an unwinding roller 412. The unwinding seat 411 is detachably connected to the frame 1, and the unwinding roller 412 is rotatably connected to the unwinding seat 411. The winding assembly 42 includes a winding seat 421 and a winding roller 422. The winding seat 421 is detachably connected to the frame 1, and the winding roller 422 is rotatably connected to the winding seat 421. A winding motor 423 is also fixed on the winding seat 421, and the winding motor 423 is driven by the winding roller 422. A roll of substrate 8 to be deposited with fibers can be placed on the unwinding roller 412. The winding motor 423 drives the winding roller 422 to rotate, releasing the substrate 8. The substrate 8 passes over the upper side of the receiving device 3 to deposit fibers and is then conveyed to the winding roller 422 to be wound up. Preferably, the frame 1 is assembled using profiles, and the unwinding seat 411 and the winding seat 421 are detachably connected to the frame 1 through profile connectors.

[0066] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A pilot-scale electrospinning device, characterized in that, include: The frame (1) includes an outer cover (11) located on the upper side, and the inner side of the outer cover (11) is provided with a working space; The nozzle device (2) is located within the workspace; A receiving device (3) is located in the workspace and is located directly below the nozzle device (2); An electric field generating control device is electrically connected to the nozzle device (2) and the receiving device (3). The electric field generating control device can generate a spinning electric field between the nozzle device (2) and the receiving device (3) and control the voltage of the spinning electric field. The nozzle device (2) can spray spinning liquid and form fiber filaments deposited on the receiving device (3) under the action of the spinning electric field. A temperature and humidity control device, which is connected to the workspace, is used to control the temperature and humidity within the workspace. The substrate expansion device includes an unwinding assembly (41) and a winding assembly (42). The unwinding assembly (41) and the winding assembly (42) are both located on the outside of the outer cover (11). The unwinding assembly (41) and the winding assembly (42) are both detachably connected to the frame (1). The receiving device (3) is located between the unwinding assembly (41) and the winding assembly (42). The outer cover (11) is provided with a substrate through hole (111) for the substrate (8) to pass through. The unwinding assembly (41) can release the substrate (8) and after it passes over the upper side of the receiving device (3), it is wound up by the winding assembly (42).

2. The pilot-scale electrospinning equipment as described in claim 1, characterized in that, The nozzle device (2) includes a lifting drive assembly (21), a lifting frame (22) and at least two sets of nozzle assemblies (23). The lifting drive assembly (21) is connected to the frame (1), and the lifting frame (22) is connected to the moving end of the lifting drive assembly (21). With the relative direction between the unwinding assembly (41) and the winding assembly (42) as the front-back direction, the lifting frame (22) is provided with at least two left-right drive assemblies (24). All the left-right drive assemblies (24) are arranged in the front-back direction. Multiple nozzle assemblies (23) are connected one-to-one to the moving ends of multiple left-right drive assemblies (24). The lifting drive assembly (21) can drive multiple sets of nozzle assemblies (23) to move up and down. The left-right drive assembly (24) can drive the corresponding nozzle assembly (23) to move left and right.

3. The pilot-scale electrospinning equipment as described in claim 2, characterized in that, The receiving device (3) includes a receiving frame (31), which is connected to the frame (1). The receiving frame (31) is provided with a drive roller (32) and a driven roller (33). The drive roller (32) and the driven roller (33) are arranged at intervals in the front-back direction. A receiving belt (34) is wound around the drive roller (32) and the driven roller (33). A receiving conductive plate (35) is also fixed on the receiving frame (31). The receiving conductive plate (35) is located on the lower side of the upper section of the receiving belt (34).

4. The pilot-scale electrospinning equipment as described in claim 3, characterized in that, The two electrodes of the electric field generating control device are electrically connected to the nozzle assembly (23) and the receiving conductive plate (35) respectively. A first insulating member (25) is connected between the nozzle assembly (23) and the moving end of the left and right drive assembly (24), and a second insulating member (36) is connected between the receiving frame (31) and the frame (1).

5. The pilot-scale electrospinning equipment as described in claim 2, characterized in that, The nozzle assembly (23) includes a mounting bracket (26), a spinneret (27), and a plurality of spinnerets (28). The mounting bracket (26) is connected to the moving end of the left and right drive assembly (24). The plurality of spinnerets (28) are connected to the spinneret (27). Mounting seats (29) are fixed on both the left and right sides of the mounting bracket (26). The left side of the spinneret (27) is detachably connected to the mounting seat (29) located on the left side, and the right side of the spinneret (27) is detachably connected to the mounting seat (29) located on the right side.

6. The pilot-scale electrospinning equipment as described in claim 5, characterized in that, The mounting base (29) is provided with mounting holes (291). The left side of the spinneret (27) is inserted into the mounting hole (291) of the mounting base (29) located on the left side and locked by the first locking member. The right side of the spinneret (27) is inserted into the mounting hole (291) of the mounting base (29) located on the right side and locked by the second locking member.

7. The pilot-scale electrospinning equipment as described in claim 1, characterized in that, The pilot electrospinning equipment also includes a liquid supply device (5), which includes a storage tank (51) for storing the spinning solution. The storage tank (51) is provided with a pressure port (511) and a liquid supply port (512). The pressure port (511) is located on the upper side of the storage tank (51). The liquid supply port (512) is connected to the nozzle device (2) through a liquid supply pipe (52). The pressure port (511) can add air pressure to the storage tank (51) to supply the spinning solution in the storage tank (51) to the nozzle device (2) through the liquid supply port (512). The liquid supply device (5) also includes a base (53), on which a weighing module (54) is provided. The liquid storage tank (51) is located on the weighing module (54), and the weighing module (54) can detect the weight of the liquid storage tank (51).

8. The pilot-scale electrospinning equipment as described in claim 1, characterized in that, The temperature and humidity control device includes a humidity control device (6) and a temperature control device; The frame (1) includes a base plate (13), the working space is located on the upper side of the base plate (13), and the humidity control device (6) is located on the lower side of the base plate (13). The base plate (13) is provided with an air inlet (131) and an air return hole (132). The humidity control device (6) is provided with an air outlet (61) and an air extraction port (62). The air inlet (131) and the air outlet (61) are connected by a pipe. The air return hole (132) and the air extraction port (62) are connected by a pipe. The humidity control device (6) can draw back the air in the working space from the air return hole (132), perform humidity control treatment, and then send it back into the working space through the air inlet (131). The constant temperature device includes a heating device located within the working space, which is capable of heating the air within the working space.

9. The pilot-scale electrospinning equipment as described in claim 8, characterized in that, The upper side of the frame (1) is provided with an exhaust hole (14), which is connected to the workspace and is used to exhaust the air in the workspace.

10. The pilot-scale electrospinning equipment as described in claim 1, characterized in that, The unwinding assembly (41) includes an unwinding seat (411) and an unwinding roller (412). The unwinding seat (411) is detachably connected to the frame (1), and the unwinding roller (412) is rotatably connected to the unwinding seat (411). The winding assembly (42) includes a winding seat (421) and a winding roller (422). The winding seat (421) is detachably connected to the frame (1), and the winding roller (422) is rotatably connected to the winding seat (421). A winding motor (423) is also fixed on the winding seat (421), and the winding motor (423) is drively connected to the winding roller (422).

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