Pneumatic liquid supply system capable of being used for mass production of electrospinning equipment

Abstract

The pneumatic liquid supply system comprises a gas supply unit, the gas supply unit comprises a gas storage tank and a compressed gas generator connected to one end of the gas storage tank, and the gas supply unit is used for providing a stable gas source; the liquid storage unit comprises at least one liquid storage tank, and a pressure release valve is arranged at the top of the liquid storage tank; the liquid supply unit comprises a pneumatic control liquid supply switch valve and a flow control valve, and one end of the pneumatic control liquid supply switch valve and one end of the flow control valve are connected to a liquid outlet in the top of the liquid storage tank; the pneumatic control unit comprises a filtering pressure reducing valve and a plurality of control hand valves, one end of the filtering pressure reducing valve is connected with the gas storage tank, the other end of the filtering pressure reducing valve is connected with the control hand valves, and the control hand valves respectively control generation of positive pressure and negative pressure and start and stop of liquid supply; the spinning unit comprises a spinning needle plate with array needles, and the spinning needle plate is connected to the liquid supply unit; the positive pressure state and the negative pressure state in pneumatic liquid supply are accurately controlled through the pneumatic control unit, the stability and safety of the system are ensured, the liquid supply rate in the spinning process is accurately regulated and controlled through the flow control valve, and the spinning quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrospinning technology, specifically to a pneumatic liquid supply system that can be used in mass production electrospinning equipment. Background Technology

[0002] Most current electrospinning equipment uses syringe pumps for liquid supply, but their capacity is typically only tens to hundreds of milliliters, which is insufficient for large-scale production. Frequent syringe changes not only increase operational complexity but also disrupt the continuous production process. Some large production lines have attempted to use large-capacity storage tanks and gravity-fed liquid supply, which can achieve continuous production to some extent, but this method is only suitable for solutions with low viscosity, and the supply rate is uncontrollable and difficult to precisely adjust. Furthermore, some research institutions have added gear pumps or peristaltic pumps between the storage tank and the electrospinning needle plate, but due to the stringent insulation requirements under high-pressure environments, these power devices are extremely complex and their reliability is significantly compromised, and they are also prone to generating air bubbles. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic liquid supply system that can be used in mass production of electrospinning equipment to solve the problems in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a pneumatic liquid supply system that can be used in mass production electrospinning equipment, comprising:

[0005] A gas supply unit, comprising a gas storage tank and a compressed gas generator connected to one end of the gas storage tank, wherein the gas supply unit is used to provide a stable gas source;

[0006] A liquid storage unit, the liquid storage unit including at least one liquid storage tank, the top of the liquid storage tank being provided with a pressure relief valve;

[0007] A liquid supply unit, comprising a pneumatically controlled liquid supply switch valve and a flow control valve, one end of which is connected to the liquid outlet at the top of the storage tank;

[0008] The pneumatic control unit includes a filter pressure reducing valve and a control valve. One end of the filter pressure reducing valve is connected to the gas storage tank, and the other end of the filter pressure reducing valve is connected to the control valve. The control valve includes multiple valves, which respectively control the generation of positive and negative pressure and control the start and stop of liquid supply.

[0009] A spinning unit, the spinning unit including a spinning needle plate with an array of needles, the spinning needle plate being connected to a liquid supply unit.

[0010] In one preferred embodiment, a filter pressure reducing valve is connected to one end of the gas storage tank, and the filter pressure reducing valve is connected to a control valve at the other end.

[0011] In a preferred embodiment, when there are two or more liquid storage tanks, the two or more liquid storage tanks are arranged in parallel.

[0012] In one preferred embodiment, the liquid supply unit includes a pneumatically controlled liquid supply switch valve and a flow control valve connected in parallel with the pneumatically controlled liquid supply switch valve, wherein the two ends of the flow control valve are respectively connected to the two sides of the pneumatically controlled liquid supply switch valve.

[0013] In one preferred embodiment, one end of the pneumatic liquid supply switch valve is connected to the top of the liquid storage tank, the other end of the pneumatic liquid supply switch valve is connected to the spinning needle plate, and the control hand valve is connected to the pneumatic liquid supply switch valve.

[0014] In one preferred embodiment, the flow rate adjustment range of the flow control valve is 0.1 mL / min to 50 mL / min.

[0015] In one preferred embodiment, a baffle plate is provided inside the liquid storage tank.

[0016] In one preferred embodiment, the control valve includes a liquid supply switch valve control valve, a front negative pressure control valve, a positive pressure control valve, and a rear negative pressure control valve. The liquid supply switch valve control valve, the front negative pressure control valve, and the positive pressure control valve are arranged in parallel. One end of the front negative pressure control valve is connected to a vacuum generator, and one end of the vacuum generator is connected to the rear negative pressure control valve.

[0017] In one preferred embodiment, one end of the negative pressure control valve is connected to a four-way connector, which is connected to a liquid storage tank and a pressure gauge.

[0018] In one preferred embodiment, the capacity of the storage tank is 1L-100L.

[0019] Due to the application of the above technical solution, the beneficial effects of this application compared with the prior art are as follows:

[0020] This application discloses a pneumatic liquid supply system that can be used in mass production electrospinning equipment. The system ensures stability and safety by precisely controlling the positive and negative pressure states in the pneumatic liquid supply through a pneumatic control unit. The system also achieves precise regulation of the liquid supply rate during the spinning process through a flow control valve, thereby improving the spinning quality. In addition, this application is compatible with various specifications of liquid storage tanks and can be adapted to different capacity liquid storage tanks from 1L to 100L, providing high flexibility. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0022] Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of the pneumatic liquid supply system of this utility model that can be used in mass production electrospinning equipment;

[0024] Figure 2 This is a schematic diagram of the pneumatic liquid supply system of this utility model that can be used in mass production electrospinning equipment;

[0025] Figure 3 This is a schematic diagram of the airflow path and solution path during the liquid supply process of the pneumatic liquid supply system of this utility model, which can be used in mass production electrospinning equipment;

[0026] Figure 4 This is a schematic diagram of the airflow path and solution path during liquid suction and retraction in the pneumatic liquid supply system of this utility model, which can be used in mass production electrospinning equipment.

[0027] In the diagram: 101, compressed gas generator; 102, gas storage tank; 103, filter pressure reducing valve; 104, liquid supply switch valve control valve; 105, front negative pressure control valve; 106, positive pressure control valve; 107, pressure gauge; 108, rear negative pressure control valve; 109, vacuum generator; 110, pressure relief valve; 111, spinning needle plate; 112, pneumatic liquid supply switch valve; 113, flow control valve; 114, liquid storage tank. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0032] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] Figures 1-2 This utility model discloses a pneumatic liquid supply system for mass production electrospinning equipment, comprising:

[0036] The gas supply unit includes a gas storage tank 102 and a compressed gas generator 101 connected to one end of the gas storage tank 102. The gas supply unit is used to provide a stable gas source, which includes compressed air or nitrogen.

[0037] The liquid storage unit includes at least one liquid storage tank 114, and a pressure relief valve 110 is provided on the top of the liquid storage tank 114 to automatically release pressure when the pressure exceeds a preset threshold.

[0038] The liquid supply unit includes a pneumatically controlled liquid supply switch valve 112 and a flow control valve 113. One end of both the pneumatically controlled liquid supply switch valve 112 and the flow control valve 113 is connected to the liquid outlet at the top of the liquid storage tank 114.

[0039] The pneumatic control unit includes a filter pressure reducing valve 103 and a control valve. One end of the filter pressure reducing valve 103 is connected to the gas storage tank 114, and the other end of the filter pressure reducing valve 103 is connected to the control valve. The control valve includes multiple valves, which respectively control the generation of positive and negative pressure and control the start and stop of liquid supply.

[0040] The spinning unit includes a spinning needle plate 111 with an array of needles, which is connected to the liquid supply unit.

[0041] Specifically, the spinning unit uses a 10×50 array needle plate, which is equipped with a high-voltage power supply to output 30-100kV voltage for electrospinning. The needle plate of the spinning unit adopts an array design with a needle spacing of 2-8cm, and is equipped with a high-voltage power supply to realize electrospinning. The spinning solution enters the needle plate under pressure and is completely filled, and then sprays out from the needle tip to realize spinning. After spinning, the remaining spinning solution in the needle plate can be accelerated under negative pressure to improve production efficiency.

[0042] According to an embodiment of the present invention, one end of the gas storage tank 102 is connected to a filter pressure reducing valve 103, and one end of the filter pressure reducing valve 103 is connected to a control manual valve.

[0043] According to the embodiments of this utility model, when there are two or more liquid storage tanks 114, the two or more liquid storage tanks 114 are arranged in parallel, which can support long-term uninterrupted production.

[0044] According to an embodiment of the present invention, the liquid supply unit includes a pneumatically controlled liquid supply switch valve 112 and a flow control valve 113 connected in parallel with the pneumatically controlled liquid supply switch valve 112. The two ends of the flow control valve 113 are respectively connected to the two sides of the pneumatically controlled liquid supply switch valve 112.

[0045] Specifically, when rapidly supplying or drawing liquid, the pneumatic liquid supply switch valve 112 is opened; when electrospinning, the pneumatic liquid supply switch valve 112 is closed, and the spinning liquid enters the spinning needle plate 111 through the flow control valve 113, thereby achieving precise control of the liquid supply rate.

[0046] According to an embodiment of the present invention, one end of the pneumatic liquid supply switch valve 112 is connected to the top of the liquid storage tank 114, the other end of the pneumatic liquid supply switch valve 112 is connected to the spinning needle plate 111, and the control hand valve is connected to the pneumatic liquid supply switch valve 112.

[0047] According to an embodiment of the present invention, the flow rate adjustment range of the flow control valve 113 is 0.1 mL / min to 50 mL / min.

[0048] According to an embodiment of the present invention, a baffle plate is provided inside the liquid storage tank 114 to reduce the generation of bubbles.

[0049] According to an embodiment of the present invention, the control valve includes a liquid supply switch valve control valve 104, a front negative pressure control valve 105, a positive pressure control valve 106, and a rear negative pressure control valve 108. The liquid supply switch valve control valve 104, the front negative pressure control valve 105, and the positive pressure control valve 106 are arranged in parallel. One end of the front negative pressure control valve 105 is connected to a vacuum generator 109, and one end of the vacuum generator 109 is connected to the rear negative pressure control valve 108.

[0050] Specifically, the storage tank 114 is used to store the spinning solution. When the pneumatic control unit provides positive pressure, the spinning solution is pressurized and sent into the supply unit; when negative pressure is provided, the spinning solution will flow back from the supply unit to the storage tank 114.

[0051] According to an embodiment of the present invention, one end of the negative pressure control hand valve 108 is connected to the positive pressure control hand valve 106 to a four-way connector, the four-way connector is connected to the liquid storage tank 114, and a pressure gauge 107 is connected thereto.

[0052] According to an embodiment of this utility model, the capacity of the liquid storage tank 114 is 1L-100L.

[0053] Preferably, the capacity of the storage tank 114 is 20L.

[0054] Specifically, the liquid storage tank 114 is made of corrosion-resistant material, preferably stainless steel.

[0055] In a preferred embodiment of this utility model, such as Figure 3 The diagram shows the pneumatic and solution paths of the liquid supply process. The gas generated by the compressed gas generator 101 enters the gas storage tank 102 for storage. After passing through the filter pressure reducing valve 103 and being set to a suitable pressure, the liquid supply switch valve control manual valve 104 and the positive pressure control manual valve 106 are opened, thereby opening the pneumatic liquid supply switch valve 112. Simultaneously, the compressed gas enters the liquid storage tank 114, compressing the spinning liquid into the liquid supply pipeline. It flows through the flow control valve 113 and the pneumatic liquid supply switch valve 112 and then enters the spinning needle plate 111. After the spinning liquid fills the cavity in the needle plate, the liquid supply switch valve control manual valve is closed, so that the spinning liquid enters the needle plate at a uniform flow rate set by the flow control valve 113, achieving uniform liquid supply.

[0056] In another preferred embodiment of this utility model, such as Figure 4The diagram shows the pneumatic and solution paths of the liquid suction and retraction process. After spinning is completed, the positive pressure control valve 106 can be closed, while the front negative pressure control valve 105 and the rear negative pressure control valve 108 are opened. The pressure gauge 107 is observed. After the tank pressure is released, the liquid supply switch valve control valve is opened, and the pneumatic liquid supply switch valve 112 is opened. A negative pressure is generated in the tank, and the remaining liquid in the needle plate is drawn back to the storage tank 114 along the liquid supply pipeline. After the retraction is completed, all control valves are closed.

[0057] In summary, the pneumatic liquid supply system of this application, which can be used in mass production electrospinning equipment, ensures the stability and safety of the system by precisely controlling the positive and negative pressure states in the pneumatic liquid supply through the pneumatic control unit. The flow control valve 113 enables precise regulation of the liquid supply rate during the spinning process, thereby improving the spinning quality. In addition, this application is compatible with various specifications of liquid storage tanks 114, and can be adapted to liquid storage tanks 114 with different capacities from 1L to 100L, which is highly flexible.

[0058] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic liquid supply system for mass production electrospinning equipment, characterized in that... ,include: A gas supply unit, comprising a gas storage tank and a compressed gas generator connected to one end of the gas storage tank, wherein the gas supply unit is used to provide a stable gas source; A liquid storage unit, the liquid storage unit including at least one liquid storage tank, the top of the liquid storage tank being provided with a pressure relief valve; A liquid supply unit, comprising a pneumatically controlled liquid supply switch valve and a flow control valve, one end of which is connected to the liquid outlet at the top of the storage tank; The pneumatic control unit includes a filter pressure reducing valve and a control valve. One end of the filter pressure reducing valve is connected to the gas storage tank, and the other end of the filter pressure reducing valve is connected to the control valve. The control valve includes multiple valves, which respectively control the generation of positive and negative pressure and control the start and stop of liquid supply. A spinning unit, the spinning unit including a spinning needle plate with an array of needles, the spinning needle plate being connected to a liquid supply unit.

2. The pneumatic liquid supply system for mass-produced electrospinning equipment as described in claim 1, characterized in that: One end of the gas storage tank is connected to a filter pressure reducing valve, and the other end of the filter pressure reducing valve is connected to a liquid supply control manual valve.

3. The pneumatic liquid supply system for mass-produced electrospinning equipment as described in claim 1, characterized in that: When there are two or more liquid storage tanks, the two or more liquid storage tanks are arranged in parallel.

4. A pneumatic liquid supply system for mass-produced electrospinning equipment as described in claim 2, characterized in that: The liquid supply unit includes a pneumatically controlled liquid supply switch valve and a flow control valve connected in parallel with the pneumatically controlled liquid supply switch valve. The two ends of the flow control valve are respectively connected to the two sides of the pneumatically controlled liquid supply switch valve.

5. A pneumatic liquid supply system for mass production electrospinning equipment as described in claim 4, characterized in that: One end of the pneumatic liquid supply switch valve is connected to the top of the liquid storage tank, and the other end of the pneumatic liquid supply switch valve is connected to the spinning needle plate. The control hand valve is connected to the pneumatic liquid supply switch valve.

6. A pneumatic liquid supply system for mass-production electrospinning equipment as described in claim 5, characterized in that: The flow rate adjustment range of the flow control valve is 0.1 mL / min to 50 mL / min.

7. A pneumatic liquid supply system for mass-produced electrospinning equipment as described in claim 1, characterized in that: The liquid storage tank is equipped with a flow guide plate inside.

8. A pneumatic liquid supply system for mass-produced electrospinning equipment as described in claim 1, characterized in that: The control valve includes a liquid supply switch valve control valve, a front negative pressure control valve, a positive pressure control valve, and a rear negative pressure control valve. The liquid supply switch valve control valve, the front negative pressure control valve, and the positive pressure control valve are connected in parallel. One end of the front negative pressure control valve is connected to a vacuum generator, and one end of the vacuum generator is connected to the rear negative pressure control valve.

9. A pneumatic liquid supply system for mass production electrospinning equipment as described in claim 8, characterized in that: One end of the negative pressure control valve is connected to a four-way connector, which is connected to the liquid storage tank and a pressure gauge.

10. A pneumatic liquid supply system for mass-produced electrospinning equipment as described in claim 1, characterized in that: The capacity of the storage tank is 1L-100L.

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