Infiltration device

Abstract

The utility model provides an infiltration device. The infiltration device comprises an infiltration tank, an air compressor and a booster pump. Wherein the infiltration tank is used for infiltrating a graphite polar plate, and a gas inlet is formed in the top of the infiltration tank and used for introducing gas to increase the pressure in the infiltration tank; the air compressor is provided with an air outlet, and the air outlet is communicated with the air inlet through a normal-pressure pipeline and a pressurizing pipeline which are connected in parallel; the booster pump is arranged on the pressurizing pipeline and used for increasing the gas pressure on the pressurizing pipeline. According to the infiltration device, normal-pressure ventilation of the air compressor to the infiltration tank is achieved through the normal-pressure pipeline, and pressurization ventilation of the air compressor to the infiltration tank is achieved through the pressurization pipeline and the pressurization pump. By arranging the two gas conveying pipelines, the pressure in the infiltration tank is effectively improved, so that the infiltration effect of the infiltration device on the graphite electrode plate is effectively improved, and the application range of the infiltration tank is widened.

Description

Technical Field

[0001] This disclosure relates to the field of fuel cell technology, and more particularly to an impregnation device. Background Technology

[0002] A fuel cell stack consists of components such as bipolar plates, membrane electrode assemblies (MEAs), end plates, and current collectors. Graphite electrode plates are a commonly used component in fuel cell stacks, and polymer impregnation is an essential process in their production. This process involves impregnating the graphite electrode plate with a polymer adhesive to improve its strength, electrical properties, and corrosion resistance. During the impregnation process, the impregnation tank needs to be pressurized using an air compressor to reduce impregnation time and improve the impregnation effect. The air compressor output pressure is typically 0–0.8 MPa. However, with the development and advancement of the fuel cell field, the requirements for the strength and electrochemical properties of graphite electrode plates are becoming increasingly stringent, necessitating the application of greater pressure during the graphite electrode plate impregnation process. Utility Model Content

[0003] One of the technical problems that this disclosure aims to solve is that the pressure inside the impregnation tank of existing impregnation devices is low, resulting in unsatisfactory impregnation effects.

[0004] To address the aforementioned technical problems, this disclosure provides an impregnation apparatus, comprising:

[0005] Impregnation tank, which is designed for impregnating graphite electrode plates, has an air inlet at the top for introducing gas to increase the pressure inside the impregnation tank;

[0006] An air compressor, having an air outlet, which is connected to the air inlet via parallel atmospheric pressure and booster lines; and

[0007] The booster pump is installed on the booster pipeline to increase the gas pressure on the pipeline.

[0008] In some embodiments, the impregnation apparatus further includes a pressure regulator disposed on the booster line and downstream of the booster pump, for regulating the gas pressure on the booster line.

[0009] In some embodiments, the impregnation apparatus further includes a controller configured to transmit electrical signals to a pressure regulator to control the impregnation tank to reach a set pressure.

[0010] In some embodiments, the impregnation apparatus further includes:

[0011] The first check valve is installed on the atmospheric pressure pipeline; and

[0012] The second check valve is installed on the booster pipeline between the booster pump and the air inlet.

[0013] In some embodiments, the impregnation apparatus further includes:

[0014] The main pipeline connects to the air inlet at one end and to both the atmospheric pressure pipeline and the booster pipeline at the other end; and

[0015] Pneumatic ball valve, which is installed on the main pipeline.

[0016] In some embodiments, the impregnation apparatus further includes a pressure gauge for monitoring the pressure inside the impregnation tank.

[0017] In some embodiments, the impregnation apparatus further includes a safety valve disposed on the impregnation tank for relieving pressure inside the impregnation tank.

[0018] In some embodiments, the impregnation apparatus further includes a storage tank, an impregnation pipeline for allowing the impregnation fluid in the storage tank to flow from the storage tank to the impregnation tank, and a return pipeline for allowing the impregnation fluid in the impregnation tank to flow from the impregnation tank to the storage tank.

[0019] In some embodiments, the impregnation apparatus further includes a vacuum pump, the suction port of which is connected to the impregnation tank and the storage tank respectively, for evacuating the impregnation tank and the storage tank.

[0020] In some embodiments, the impregnation apparatus further includes a filter disposed on a return line.

[0021] The impregnation apparatus provided by this disclosure, through the above technical solution, includes an impregnation tank, an air compressor, and a booster pump. The air compressor and the booster pump are connected via parallel atmospheric pressure pipeline and booster pipeline. The atmospheric pressure pipeline enables the air compressor to supply air to the impregnation tank at atmospheric pressure, while the booster pipeline enables the air compressor to supply pressurized air to the impregnation tank. A booster pump is installed on the booster pipeline to pressurize the gas supplied by the air compressor to the impregnation tank. By setting up two gas supply pipelines, the pressure inside the impregnation tank is effectively increased, thereby effectively improving the impregnation effect of the impregnation apparatus on the graphite electrode plate and broadening the application range of the impregnation tank. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the impregnation apparatus disclosed in an embodiment of the present disclosure;

[0024] Figure 2This is a schematic diagram showing the connection between the controller and the pressure regulator disclosed in this embodiment;

[0025] Figure 3 This is another schematic diagram of the impregnation apparatus disclosed in this embodiment.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Impregnation device; 10. Impregnation tank; 20. Air compressor; 30. Liquid storage tank; 40. Vacuum pump; 50. Controller; 60. Main pipeline;

[0028] 11. Pressure gauge; 12. Safety valve; 31. Impregnation pipeline; 32. Return pipeline; 61. Atmospheric pressure pipeline; 62. Booster pipeline;

[0029] 321. Filter; 601. Pneumatic ball valve; 611. First check valve; 621. Booster pump; 622. Second check valve; 623. Pressure regulator;

[0030] 10a, air inlet; 20a, air outlet; 40a, air intake. Detailed Implementation

[0031] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0032] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0033] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0035] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0036] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0038] Please see Figure 1 , Figure 1 This is a schematic diagram of an impregnation device disclosed in this embodiment. This embodiment provides an impregnation device 1, including an impregnation tank 10, an air compressor 20, and a booster pump 621. The impregnation tank 10 is configured for impregnating graphite electrode plates, and has an air inlet 10a at its top for introducing gas to increase the internal pressure. The air compressor 20 has an air outlet 20a, which is connected to the air inlet 10a via a parallel atmospheric pressure pipeline 61 and a booster pipeline 62. The booster pump 621 is mounted on the booster pipeline 62 to increase the gas pressure on the booster pipeline 62.

[0039] It is understood that the impregnation device 1 provided in this disclosure is an apparatus for the impregnation process of graphite bipolar plates in the field of fuel cells. When the impregnation device 1 provided in this disclosure impregnates graphite electrode plates, the graphite plate to be impregnated is first placed in the impregnation tank 10, and then the impregnation fluid is introduced into the impregnation tank 10 so that the graphite plate to be impregnated is completely submerged in the impregnation fluid. Finally, the impregnation tank 10 is pressurized so that the pressure inside the impregnation tank 10 is higher, and the impregnation fluid can fully penetrate into the pores of the graphite plate, shortening the impregnation time, improving the impregnation efficiency, and improving the electrochemical properties of the graphite electrode plate after impregnation, such as conductivity, corrosion resistance, and bending strength.

[0040] It is understood that the impregnation tank 10 provided in this disclosure is the impregnation site for the graphite plate to be impregnated; the air compressor 20 provided in this disclosure is a pressure device for pressurizing the impregnation tank 10. The air compressor 20 draws in air and pressurizes the air, and then through pipelines (atmospheric pressure pipeline 61 and pressurization pipeline 62), the pressurized gas is introduced from the air outlet 20a of the air compressor 20 into the air inlet 10a of the impregnation tank 10 to pressurize the impregnation tank 10, thereby enabling the impregnation device 1 provided in this disclosure to achieve pressurized impregnation of graphite plates.

[0041] To more clearly illustrate the beneficial effects of this disclosure, related technologies are introduced here. In these technologies, no booster pump 621 is installed between the air compressor 20 and the impregnation tank 10; they are only connected by an atmospheric pressure pipeline 61. Typically, the maximum pressure of the air compressor 20 is 0.8 MPa. With the development and progress in the field of fuel cell stacks, graphite bipolar plates, as an important component of fuel cell systems, have increasingly higher performance requirements, as well as increasingly stringent requirements for the impregnation process. The maximum pressure of the traditional air compressor 20 can no longer meet the performance requirements of the graphite bipolar plates. Therefore, it is necessary to innovate and improve the pressurization method of the impregnation tank 10 to increase the impregnation pressure of the impregnation tank 10 and meet the impregnation requirements of the graphite bipolar plates.

[0042] The air compressor 20 disclosed herein has two parallel gas pipelines (atmospheric pressure pipeline 61 and booster pipeline 62) connected between its outlet 20a and inlet 10a of the impregnation tank 10. A booster pump 621 is installed on the booster pipeline 62 to increase the gas pressure. It is understood that the atmospheric pressure pipeline 61 allows the air compressor to supply air to the impregnation tank 10 at atmospheric pressure, while the booster pipeline 62 and booster pump 621 allow the air compressor to supply pressurized air to the impregnation tank 10. By setting up two gas pipelines, the pressure inside the impregnation tank 10 is effectively increased, thereby effectively improving the impregnation effect of the impregnation device 1 on the graphite electrode plate and broadening the application range of the impregnation tank 10.

[0043] It is understood that the impregnation tank 10 has an inflation stage, a pressure holding stage, and an exhaust stage during the impregnation process. In the inflation stage, the impregnation device 1 provided in this disclosure uses both the atmospheric pressure pipeline 61 and the pressurization pipeline 62 to pneumatically inflate the impregnation tank 10. The two gas pipelines (atmospheric pressure pipeline 61 and pressurization pipeline 62) significantly increase the inflation speed, resulting in higher efficiency for the impregnation device 1. Furthermore, compared to a technical solution with only one pressurization pipeline 62, having two pipelines between the impregnation tank 10 and the air compressor 20 ensures the stability of the impregnation device 1 and prevents it from becoming unusable due to a failure in one pipeline.

[0044] It is understood that the air compressor 20 provided in this disclosure may have two outlets 20a, one outlet 20a connected to the normal pressure pipeline 61 and the other outlet 20a connected to the booster pipeline 62; the air compressor 20 may also have only one outlet 20a, with the normal pressure pipeline 61 and the booster pipeline 62 simultaneously connected to one outlet 20a or connected in parallel to a main pipe connected to the outlet 20a. Similarly, it is understood that the impregnation tank 10 provided in this disclosure may have two inlets 10a, one inlet 10a connected to the normal pressure pipeline 61 and the other inlet 10a connected to the booster pipeline 62; the impregnation tank 10 may also have only one inlet 10a, with the normal pressure pipeline 61 and the booster pipeline 62 simultaneously connected to one inlet 10a or connected in parallel to a main pipe connected to the inlet 10a. As long as the parallel atmospheric pressure pipeline 61 and the booster pipeline 62 are connected to the air inlet 10a and the air outlet 20a, they all fall within the protection scope of this disclosure.

[0045] Compared to the technical solution where the pressurization pipeline 62 is directly connected to the high-pressure gas tank, the pressurization pipeline 62 of this disclosure achieves pressurization by connecting the pressurization pump 621 to the air compressor 20. This allows the impregnation device 1 provided by this disclosure to have unlimited usage time, avoiding the inconvenience of replacing the high-pressure gas tank during use. It also makes the output pressure stable and controllable, and the output pressure of the pressurization pipeline 62 can be adjusted by simply adjusting the frequency of the pressurization pump 621. Finally, it also ensures the safety of the impregnation device 1 and avoids the risk of explosion of the high-pressure gas tank.

[0046] It is understood that the booster pump 621 provided in this disclosure can be, but is not limited to, a pneumatic booster pump, an electric booster pump, etc.; it is understood that the booster pump 621 provided in this disclosure can be a 2x booster pump, a 1.5x booster pump, a 3x booster pump, a 5x booster pump, a 10x booster pump, etc. The above describes the types of booster pump 621 disclosed, and should not be construed as limiting the type of booster pump 621 provided in this disclosure.

[0047] Please refer to it again. Figure 1In some embodiments, the impregnation apparatus 1 further includes a pressure regulator 623, which is disposed on the booster line 62 and downstream of the booster pump 621, for regulating the gas pressure on the booster line 62.

[0048] It is understood that the pressure regulator 623 is configured to reduce the pressure of the pressurization pipeline 62. When the impregnation device 1 provided in this embodiment is in the pressure holding stage, the pressurization pipeline 62 is configured to stably output gas to the impregnation tank 10 to ensure that the internal pressure of the impregnation tank 10 is at the set pressure. At this time, the air compressor pressurizes the air it draws in and outputs pressurized gas to the pressurization pipeline 62. The booster pump 621 on the pressurization pipeline 62 pressurizes the pressurized gas a second time and outputs pressurized gas. The pressure regulator 623 adjusts the pressure of the pressurized gas accordingly based on the set pressure inside the impregnation tank 10 so that the output pressure of the pressurization pipeline 62 meets the impregnation requirements.

[0049] In some embodiments, the pressure regulator 623 is configured to be associated with an automatic control component, thereby achieving automatic control of the pressure regulator 623; in some embodiments, the pressure regulator 623 is configured to be associated with a pressure metering component provided on the impregnation tank 10, thereby achieving automatic control of the pressure regulator 623. In some embodiments, the pressure regulating device is an opening valve regulating device, which regulates the output pressure on the booster line 62 by adjusting the valve opening; in some embodiments, the pressure regulating device is a frequency control component for the booster pump 621, which regulates the output pressure on the booster line 62 by changing the frequency of the booster pump 621.

[0050] It should be noted that the above are examples of the setting method and structure of the pressure regulator 623 provided in this embodiment, and should be understood as a limitation of the setting method and structure of the pressure regulator 623 provided in this embodiment. Any device that can adjust the output pressure of the booster pipeline 62 falls within the protection scope of the pressure regulator 623 provided in this embodiment.

[0051] Please refer to it again. Figure 1 And please see Figure 2 , Figure 2 This is a schematic diagram of the connection between the controller and the pressure regulator disclosed in an embodiment of this disclosure. In some embodiments, the impregnation apparatus 1 further includes a controller 50, which is configured to transmit electrical signals to the pressure regulator 623 to control the impregnation tank 10 to reach a set pressure.

[0052] It is understood that in this embodiment, the pressure regulator 623 achieves automatic pressure control through the controller 50. In some embodiments, the operator pre-inputs a control target into the controller 50, and the controller 50 automatically controls the output pressure of the booster pipeline 62 according to the control target. In some embodiments, the impregnation device 1 is equipped with a data acquisition component associated with the controller 50, which can collect one or more of the temperature and pressure data of the impregnation tank 10 and the temperature and pressure data of the pipeline, and upload the collected data to the controller 50. The controller 50 automatically simulates and analyzes the collected data to predict a reasonable pipeline pressure output value, and guides the pressure regulator 623 to adjust the output pressure of the booster pipeline 62 according to the value.

[0053] It should be noted that the above are examples of the control methods of the controller 50 on the pressure regulator 623 provided in this embodiment. They should be understood as limitations on the control methods of the controller 50 on the pressure regulator 623 provided in this embodiment. Any method that enables the controller 50 to achieve automatic control of the pressure regulator 623 falls within the protection scope of the pressure regulator 623 provided in this embodiment.

[0054] Please see Figure 2 , Figure 2 The two circular terminals on top of the pressure regulator 623 are connection points, which are connected to the positive and negative terminals of the power supply, respectively. In some embodiments, the pressure regulator 623 is powered by 24V DC. Figure 2 The two circles on the right side of the medium pressure regulator 623 are connected to the controller 50, so that the controller 50 controls the pressure regulator 623 to adjust the output pressure of the booster line 62.

[0055] Please refer to it again. Figure 1 In some embodiments, the impregnation device 1 further includes a first one-way valve 611 and a second one-way valve 622. The first one-way valve 611 is disposed on the atmospheric pressure pipeline 61; the second one-way valve 622 is disposed on the booster pipeline 62 between the booster pump 621 and the air inlet 10a.

[0056] It is understood that in this embodiment, the first one-way valve 611 and the second one-way valve 622 serve to check the backflow of pressurized gas, protect the atmospheric pressure pipeline 61 and the pressurization pipeline 62, and prevent excessive pressure in the impregnation tank 10 from flowing back into the air compressor 20 through the gas pipeline, especially the atmospheric pressure pipeline 61, causing pipeline damage, and in severe cases, damaging the air compressor 20, causing dangers such as fire and explosion.

[0057] Understandably, when the impregnation device 1 is in the inflation stage, the atmospheric pressure pipeline 61, under pressure, opens the first one-way valve 611 and the booster pipeline 62 together to inflate the impregnation tank 10. The two gas lines are inflated simultaneously, improving inflation efficiency. During inflation, when the pressure inside the impregnation tank 10 is slightly higher than the inlet pressure, because the downstream pressure of the first one-way valve 611 is greater than the upstream pressure, the first one-way valve 611 closes under the action of air pressure, thereby closing the atmospheric pressure pipeline 61.

[0058] When the first one-way valve 611 closes, the pressurization pipeline 62 remains open, pressurizing the impregnation tank 10. When the pressure inside the impregnation tank 10 reaches the set pressure of the controller 50, the impregnation tank 10 enters the pressure holding stage, at which point the impregnation process can proceed. The second one-way valve 622 installed on the pressurization pipeline 62 at this time serves to protect the pressurization pipeline 62, preventing fluctuations in the gas pressure inside the impregnation tank 10 from affecting the pressurization pipeline 62.

[0059] Please refer to it again. Figure 1 In some embodiments, the impregnation device 1 further includes a main pipeline 60 and a pneumatic ball valve 601. One end of the main pipeline 60 is connected to the air inlet 10a, and the other end is connected to one end of the atmospheric pressure pipeline 61 and one end of the pressurization pipeline 62; the pneumatic ball valve 601 is disposed on the main pipeline 60.

[0060] It is understood that in this embodiment, the atmospheric pressure pipeline 61 and the booster pipeline 62 are connected in parallel between the main pipeline 60 and the air compressor 20, and the main pipeline 60 is connected in series between the impregnation tank 10 and the atmospheric pressure pipeline 61 and the booster pipeline 62 connected in parallel. It is understood that the pneumatic ball valve 601 in this embodiment is configured to protect the safety of the gas pipeline, and the air compressor 20 can be manually closed to stop supplying gas to the impregnation tank 10. It is understood that when the impregnation device 1 provided in this embodiment is applied to the impregnation process of graphite electrode plates, the pneumatic ball valve 601 is in the normally open state.

[0061] Please refer to it again. Figure 1 In some embodiments, the impregnation apparatus 1 further includes a pressure gauge 11 for monitoring the pressure inside the impregnation tank 10.

[0062] In some embodiments, pressure gauge 11 is located at the top of impregnation tank 10, allowing operation and maintenance personnel to easily monitor the pressure within impregnation tank 10. In some embodiments, pressure gauge 11 is also associated with controller 50, which, when the pressure within impregnation tank 10 is detected to exceed the allowable pressure, instructs controller 50 to control pressure regulator 623 to reduce the pressure output of pressurization line 62. In some embodiments, pressure gauge 11 is directly associated with pressure regulator 623, which automatically reduces the output pressure when the pressure within impregnation tank 10 is detected to exceed the allowable pressure. In some embodiments, pressure gauge 11 is associated with pneumatic ball valve 601, which closes when the pressure within impregnation tank 10 is detected to exceed the allowable pressure.

[0063] Please refer to it again. Figure 1 In some embodiments, the impregnation apparatus 1 further includes a safety valve 12, which is disposed on the impregnation tank 10 and is used to relieve pressure inside the impregnation tank 10.

[0064] In some embodiments, the pressure gauge 11 is located at the top of the impregnation tank 10, so that when the safety valve 12 releases the pressure inside the impregnation tank 10, the gas inside the impregnation tank 10 flows out from the top of the tank, without affecting other components and devices within the impregnation process space. In some embodiments, the pressure gauge 11 is associated with the safety valve 12; when the pressure inside the impregnation tank 10 is detected to exceed the allowable pressure, the safety valve 12 automatically opens to release the pressure inside the impregnation tank 10, ensuring the safety of the impregnation process.

[0065] Please refer to it again. Figure 1 And please see Figure 3 , Figure 3 This is another schematic diagram of the impregnation apparatus disclosed in this embodiment. In some embodiments, the impregnation apparatus 1 further includes a storage tank 30, an impregnation pipeline 31 for flowing impregnation fluid in the storage tank 30 from the storage tank 30 to the impregnation tank 10, and a return pipeline 32 for flowing impregnation fluid in the impregnation tank 10 from the impregnation tank 10 to the storage tank 30.

[0066] It is understood that the storage tank 30 provided in this embodiment is configured to store the impregnation fluid, supply the impregnation fluid to the impregnation tank 10, and recover the used impregnation fluid after impregnation of the graphite plates. It is understood that when the impregnation device 1 provided in this embodiment performs impregnation operation, the impregnation fluid in the storage tank 30 enters the impregnation tank 10 through the impregnation pipeline 31, and the air compressor and booster pump 621 are started to pressurize the impregnation tank 10 to impregnate the graphite plates in the impregnation tank 10; after the impregnation operation is completed, the impregnation fluid in the impregnation tank 10 flows back to the storage tank 30 through the return pipeline 32 to complete the recovery of the impregnation fluid.

[0067] In some embodiments, the impregnation device 1 is further equipped with a vacuum pump 40, which regulates the pressure values ​​inside the impregnation tank 10 and the storage tank 30. This allows the impregnation fluid to flow from the impregnation tank 10 to the storage tank 30 or from the storage tank 30 to the impregnation tank 10 under the pressure difference between the two tanks, through the return pipeline 32 and the impregnation tank 10. In some embodiments, one or more pumps and / or one or more valves are installed on the return pipeline 32 and the impregnation tank 10, and the flow of the impregnation fluid from the impregnation tank 10 to the storage tank 30 or from the storage tank 30 to the impregnation tank 10 is achieved through pump-valve interlocking.

[0068] Please refer to it again. Figure 1 and Figure 3 In some embodiments, the impregnation apparatus 1 further includes a vacuum pump 40, the suction port 40a of which is connected to the impregnation tank 10 and the storage tank 30 respectively, for performing vacuuming treatment on the impregnation tank 10 and the storage tank 30.

[0069] It is understood that in this embodiment, the impregnation device 1 uses a vacuum pump 40 to allow the impregnation fluid to flow from the impregnation tank 10 to the storage tank 30 or vice versa. When the impregnation device 1 provided in this embodiment performs impregnation operations, the vacuum pump 40 first evacuates the impregnation tank 10. Under the negative pressure inside the impregnation tank 10, the impregnation fluid in the storage tank 30 flows from the storage tank 30 to the impregnation tank 10 through the impregnation pipeline 31. After the impregnation process of the graphite electrode plate is completed, the vacuum pump 40 evacuates the storage tank 30. Under the negative pressure and positive pressure inside the impregnation tank 10, the impregnation fluid in the impregnation tank 10 flows back to the storage tank 30 to recover the impregnation fluid.

[0070] Please refer to it again. Figure 1 and Figure 3 In some embodiments, the impregnation apparatus 1 further includes a filter 321 disposed on the return line 32.

[0071] It is understandable that the impregnation fluid after the graphite electrode impregnation process will contain many impurities, affecting the impregnation effect of the next impregnation process. Therefore, the impregnation device 1 provided in this embodiment is equipped with a filter 321 on the return pipeline 32 to filter the impurities in the impregnation fluid after impregnation, improve the impregnation effect of the next impregnation, and extend the number of times the impregnation fluid can be used.

[0072] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0073] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. An impregnation device (1), characterized in that, include: Impregnation tank (10), the impregnation tank (10) is configured for impregnating graphite electrode plates, and the top of the impregnation tank (10) is provided with an air inlet (10a) for introducing gas to increase the pressure inside the impregnation tank (10); An air compressor (20) having an outlet (20a) connected to an inlet (10a) via a parallel atmospheric pressure line (61) and a booster line (62); and A booster pump (621) is installed on the booster pipeline (62) to increase the gas pressure on the booster pipeline (62).

2. The impregnation apparatus (1) according to claim 1, characterized in that, The impregnation device (1) also includes a pressure regulator (623), which is disposed on the booster pipeline (62) and downstream of the booster pump (621) for adjusting the gas pressure on the booster pipeline (62).

3. The impregnation apparatus (1) according to claim 2, characterized in that, The impregnation device (1) further includes a controller (50), which is configured to transmit electrical signals to the pressure regulator (623) to control the impregnation tank (10) to reach a set pressure.

4. The impregnation apparatus (1) according to claim 1, characterized in that, The impregnation device (1) further includes: A first check valve (611) is provided on the atmospheric pressure pipeline (61); and A second check valve (622) is disposed on the booster line (62) between the booster pump (621) and the air inlet (10a).

5. The impregnation apparatus (1) according to any one of claims 1-4, characterized in that, The impregnation device (1) further includes: A main pipeline (60), one end of which is connected to the air inlet (10a), and the other end of which is connected to one end of the atmospheric pressure pipeline (61) and one end of the booster pipeline (62); and A pneumatic ball valve (601) is provided on the main pipeline (60).

6. The impregnation apparatus (1) according to any one of claims 1-4, characterized in that, The impregnation device (1) also includes a pressure gauge (11) for monitoring the pressure inside the impregnation tank (10).

7. The impregnation apparatus (1) according to any one of claims 1-4, characterized in that, The impregnation device (1) also includes a safety valve (12), which is installed on the impregnation tank (10) and is used to relieve the pressure inside the impregnation tank (10).

8. The impregnation apparatus (1) according to any one of claims 1-4, characterized in that, The impregnation device (1) further includes a storage tank (30), and an impregnation pipeline (31) is provided between the storage tank (30) and the impregnation tank (10) to allow the impregnation fluid in the storage tank (30) to flow from the storage tank (30) to the impregnation tank (10), and a return pipeline (32) to allow the impregnation fluid in the impregnation tank (10) to flow from the impregnation tank (10) to the storage tank (30).

9. The impregnation apparatus according to claim 8, characterized in that, The impregnation device (1) also includes a vacuum pump (40), the suction port (40a) of which is connected to the impregnation tank (10) and the storage tank (30) respectively, for performing vacuum treatment on the impregnation tank (10) and the storage tank (30).

10. The impregnation apparatus according to claim 8, characterized in that, The impregnation device (1) further includes a filter (321) which is disposed on the return pipeline (32).

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