Pipeline system and hydrogen fuel cell

Abstract

The utility model discloses a pipeline system and a hydrogen fuel cell. The pipeline system comprises an inner pipeline, an outer pipeline, a driving device and a box body, a first flow channel is arranged in the inner pipeline and is used for conveying hydrogen; the inner pipeline is sleeved with the outer pipeline, a second flow channel is defined by the inner wall face of the outer pipeline and the outer wall face of the inner pipeline, the second flow channel is isolated from the first flow channel and the external atmospheric environment, and the second flow channel is filled with nitrogen; an inner cavity of the box body is isolated from the external atmospheric environment and communicates with the outer pipeline, and the driving device is used for driving nitrogen to flow. When the hydrogen is conveyed in the first flow channel, if leakage or permeation occurs, the hydrogen can be leaked into the second flow channel, and because nitrogen in the second flow channel is in a circulating state, the leaked hydrogen enters the box body along with the circulating nitrogen, so that the hydrogen in the inner pipeline is prevented from being leaked into the external environment to generate explosion, suffocation and other dangers; and leaked and permeated hydrogen is automatically treated, so that the safety and reliability of the system are enhanced.

Description

Technical Field

[0001] The utility model relates to the field of air intake pipelines, in particular to a pipeline system and a hydrogen fuel cell. Background Art

[0002] In the shipping sector, the energy transition of ships has always been a hot topic. Traditional fuels produce a lot of pollutants during use, which has a significant impact on the environment. Therefore, the development of cleaner and more efficient energy alternatives is crucial to achieving sustainable shipping.

[0003] Among them, fuel cells are a pollution-free and highly efficient energy conversion technology. It is based on the chemical reaction of hydrogen and oxygen, which is converted into electrical energy through an electrochemical process. However, in ship applications, marine fuel cell systems face the problem of hydrogen pipeline leakage and permeation. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a pipeline system that can automatically process leaked and permeated hydrogen to enhance the safety and reliability of the system.

[0005] The utility model also provides a hydrogen fuel cell comprising the above pipeline system.

[0006] According to the pipeline system of the first embodiment of the utility model, the pipeline system includes an inner pipeline, an outer pipeline, and a driving device. A first flow channel is provided inside the inner pipeline, and the first flow channel is used to transport hydrogen; the outer pipeline is sleeved outside the inner pipeline, and the inner wall surface of the outer pipeline and the outer wall surface of the inner pipeline define a second flow channel, the second flow channel is isolated from the first flow channel, the second flow channel is isolated from the external atmospheric environment, and the second flow channel is filled with nitrogen; a box, the inner cavity of the box is connected to the outer pipeline, and the inner cavity of the box is isolated from the external atmospheric environment; the driving device is used to drive the nitrogen to circulate between the inner cavity and the second flow channel.

[0007] The pipeline system according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: when hydrogen is transported in the first flow channel, if leakage or penetration occurs, it will leak into the second flow channel. Since the nitrogen in the second flow channel is in a circulating state and the inner cavity of the box is connected to the outer pipeline, the leaked hydrogen follows the circulating nitrogen into the box, reducing the hydrogen concentration in the second flow channel. In this way, the hydrogen in the inner pipeline is prevented from leaking into the external environment, causing explosion, suffocation and other dangers, and the leaked and penetrated hydrogen is automatically processed, thereby enhancing the safety and reliability of the system.

[0008] According to some embodiments of the present invention, the driving device is an air pump or a fan.

[0009] According to some embodiments of the present invention, the pipeline system includes a first baffle and a second baffle:

[0010] The box body includes a first baffle, the first baffle includes a first outer surface, the first outer surface is connected to the first end of the external pipeline, the first baffle is provided with a first through hole, and the first through hole is used to transport nitrogen to the external pipeline;

[0011] The second baffle includes a second outer surface, the second outer surface is connected to the second end of the outer pipe, and the second baffle is provided with a second through hole;

[0012] The inner pipe is inserted into the first through hole and the second through hole, and both ends of the inner pipe protrude outside the outer pipe.

[0013] According to some embodiments of the present invention, at least one through hole is provided on the outer surface of the outer pipe, and the second flow channel is connected with the inner cavity of the box body through the through hole.

[0014] According to some embodiments of the utility model, a first flange is provided at the first end of the outer pipe, the first baffle is connected to the first end through the first flange, the inner ring of the first flange is connected to the surface of the outer pipe, and a first sealing ring is provided between the first flange and the first baffle.

[0015] According to some embodiments of the utility model, a second flange is provided at the second end of the outer pipe, the second baffle is connected to the second end through the second flange, the inner ring of the second flange is connected to the inner pipe surface, and a second sealing ring is provided between the second flange and the second baffle.

[0016] According to some embodiments of the present invention, a sealing joint is provided at one end of the inner pipe located at the first baffle for connecting hydrogen.

[0017] According to some embodiments of the present invention, the sealing joint is a ferrule joint or a flange joint.

[0018] According to some embodiments of the present invention, the material of the inner pipe and the material of the outer pipe are both SUS316L / BA.

[0019] The hydrogen fuel cell according to the second embodiment of the utility model comprises the pipeline system of the first embodiment, and the pipeline system is used for the hydrogen inlet pipeline of the hydrogen fuel cell.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1A plan view of a pipeline system according to an embodiment of the first aspect of the utility model;

[0023] Figure 2 It is a plan view of the pipeline system of the utility model in which the outer and inner pipeline surfaces are provided with through holes to connect the box body;

[0024] Figure 3 A three-dimensional diagram of a pipeline system with a second baffle according to the utility model;

[0025] Figure 4 It is a three-dimensional diagram of a pipeline system with a first baffle according to the utility model.

[0026] Figure numerals: inner pipe 101, outer pipe 102, driving device 103, first baffle 104, second baffle 105, box body 106, first flange 107, second flange 108, first flow channel 14, second flow channel 13, first outer surface 15, second outer surface 16, first through hole 11, second through hole 12, sealing joint 401. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] In the description of the present invention, reference terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention.

[0032] refer to Figure 1 According to the first embodiment of the utility model, the pipeline system includes an inner pipeline 101, an outer pipeline 102, a driving device 103, and a box 106. The inner pipeline 101 is provided with a first flow channel 14, and the first flow channel 14 is used to transport hydrogen; the outer pipeline 102 is sleeved on the outside of the inner pipeline 101, and the inner wall surface of the outer pipeline 102 and the outer wall surface of the inner pipeline 101 define a second flow channel 13, the second flow channel 13 is isolated from the first flow channel 14, and the second flow channel 13 is isolated from the external atmospheric environment, and the second flow channel 13 is filled with nitrogen; the inner cavity of the box 106 is connected to the outer pipeline 102, and the inner cavity of the box 106 is isolated from the external atmospheric environment; the driving device 103 is used to drive the nitrogen to circulate between the inner cavity and the second flow channel 13.

[0033] To summarize, when hydrogen is transported in the first flow channel 14, if leakage or penetration occurs, it will leak into the second flow channel 13. Since the nitrogen in the second flow channel 13 is in a circulating state and the inner cavity of the box 106 is connected to the outer pipe 102, the leaked hydrogen follows the circulating nitrogen into the box 106, reducing the hydrogen concentration in the second flow channel 13. In this way, the hydrogen in the inner pipe 101 is prevented from leaking into the external environment, causing explosion, suffocation and other dangers, and the leaked and penetrated hydrogen is automatically processed, thereby enhancing the safety and reliability of the system.

[0034] It should be noted that the second flow channel 13 may also be filled with air, which has low cost and does not react with hydrogen. It can also take away the leaked hydrogen when hydrogen leaks and circulates to achieve the same technical effect.

[0035] In some embodiments of the present invention, the driving device 103 is an air pump or a fan. The air pump has good durability and reliability, can run stably for a long time, is easy to install, and has a wide range of applications. The fan has low noise, runs smoothly and has low power, and has a good effect of promoting air circulation. In the embodiments of the present invention, any of these devices can be selected as long as it can drive the nitrogen circulation.

[0036] The drive device 103 is not limited to Figure 1 It can also be installed on the surface of the outer pipe 102 or at the first end of the outer pipe 102 , and can drive the nitrogen flow without affecting the hydrogen transportation of the inner pipe 101 .

[0037] refer to Figure 1 In some embodiments of the utility model, the pipeline system includes a first baffle 104 and a second baffle 105, the box body 106 includes the first baffle 104, the first baffle 104 includes a first outer surface 15, the first outer surface 15 is the right side surface of the first baffle 104, the first outer surface 15 is connected to the first end of the outer pipeline 102, the first baffle 104 is provided with a first through hole 11, the first through hole 11 is used to transport nitrogen to the outer pipeline 102; the second baffle 105 includes a second outer surface 16, the second outer surface 16 is the left side surface of the second baffle 105, the second outer surface 16 is connected to the second end of the outer pipeline 102, and the second baffle 105 is provided with a second through hole 12; the inner pipeline 101 is penetrated in the first through hole 11 and the second through hole 12, and both ends of the inner pipeline 101 protrude outside the outer pipeline 102.

[0038] In this way, the two ends of the inner pipe 101 are longer than the outer pipe 102, which can better define the second flow channel 13. Because the function of the first flow channel 14 is to protect and deal with the leakage problem of the hydrogen flowing in the second flow channel 13, the two ends of the inner pipe 101 are longer than the two ends of the outer pipe 102, so that a ring with a raised middle part can be constructed on the end face of the outer pipe 102, and nitrogen can be input at the outer ring of this ring, that is, the inlet of the second flow channel 13, which can better prevent the nitrogen from flowing into the first flow channel 14 during the input process. In addition, the two ends of the inner pipe 101 are longer than the outer pipe 102, which can make it more convenient to assemble joints or other components such as filters at both ends of the inner pipe 101.

[0039] The sealed box 106 can better realize the storage and use of nitrogen, and after the box 106 is sealed and connected to the first baffle 104, the internal nitrogen naturally flows through the first through hole 11 to the second flow channel 13, and the driving device 103 can also be placed in the box 106, which has a larger space and is easier to place, thereby realizing the function of circulating nitrogen.

[0040] It should be noted that the box 106 may also be other sealed containers as long as they can store and use nitrogen.

[0041] refer to Figure 2 In some embodiments of the present invention, at least one through hole is provided on the outer surface of the outer pipe 102, and the second flow channel 13 is connected to the inner cavity of the box body 106 through the through hole.

[0042] Providing through holes on the outer surface of the outer pipe 102 can reduce the lateral space of the entire pipe system, and can adapt to situations where higher lateral space requirements are required. In addition, both ends of the outer pipe 102 can be directly sealed to the surface of the inner pipe 101 without adding other devices, and the structure is simpler.

[0043] refer to Figure 3 and Figure 4 In some embodiments of the utility model, a first flange 107 is provided at the first end of the outer pipe 102, the first baffle 104 is connected to the first end through the first flange 107, the inner circle of the first flange 107 is connected to the surface of the outer pipe 102, and a first sealing ring is provided between the first flange 107 and the first baffle 104.

[0044] The flange connection is easy to repair and replace, has low cost, reliable connection, and can withstand high air pressure. The flange connection method has extremely high sealing performance, and the first sealing ring can make the gap between the first flange 107 and the first baffle 104 smaller, thereby improving the sealing performance. The inner ring of the first flange 107 is connected to the surface of the outer pipe 102 so that the connection does not hinder the gas flow inside the outer pipe 102.

[0045] It should be noted that the first sealing ring can be made of a material with good plasticity, so that the surface of the first sealing ring can be plastically deformed to fill the microscopic unevenness of the sealing surface of the first flange 107 .

[0046] refer to Figure 3 and Figure 4 In some embodiments of the utility model, a second flange 108 is provided at the second end of the outer pipe 102, the second baffle 105 is connected to the second end through the second flange 108, the inner circle of the second flange 108 is connected to the surface of the inner pipe 101, and a second sealing ring is provided between the second flange 108 and the second baffle 105.

[0047] It should be noted that the second sealing ring can be made of a material with good elasticity, so that the surface of the second sealing ring can be plastically deformed to fill the microscopic unevenness of the sealing surface of the second flange 108 .

[0048] The flange connection is easy to repair and replace, has low cost, reliable connection, and can withstand high air pressure. The flange connection method has extremely high sealing performance, and the second sealing ring can make the gap between the second flange 108 and the second baffle 105 smaller, thereby improving the sealing performance. Since the second flange 108 is connected to the second end of the outer pipe 102, and the inner circle of the second flange 108 is connected to the surface of the inner pipe 101, the flange surface of the second flange 108 has closed the second flow channel 13 without hindering the gas flow inside the first flow channel 14, so that the nitrogen will no longer flow outward when it flows to the second end, and the hydrogen will then flow along the inner pipe 101 to the outside of the second baffle 105.

[0049] It should be noted that the second flange 108 is installed on the second end of the outer pipe 102 by welding, and the inner surface of the second flange 108 is connected to the surface of the inner pipe 101 by welding, so that the nitrogen flow can be cut off when it reaches the flange surface of the second flange 108. The welding connection performance is good, the structural rigidity is large, and the integrity is good, which can ensure the airtightness requirements here.

[0050] refer to Figure 4 In some embodiments of the present invention, a sealing joint 401 is provided at one end of the inner pipe 101 located at the first baffle 104 for connecting hydrogen.

[0051] The sealing joint 401 is used to connect the external hydrogen inlet pipeline to ensure that the hydrogen inlet line is not affected by external nitrogen or air, thereby ensuring the purity of the hydrogen. In addition, the use of the sealing joint enables the utility model to be applicable to different types of hydrogen inlet pipelines.

[0052] In some embodiments of the present invention, the sealing joint 401 is a ferrule joint or a flange joint.

[0053] The flange connection is easy to repair and replace, has low cost, reliable connection, and can withstand high air pressure. The flange connection method has extremely high sealing performance; the ferrule joint is easy to install, and the connection can be completed by simply inserting the plug into the card seat. It has good sealing performance, is strong and durable, and has certain shock resistance. In the embodiment of the utility model, any connection method can be selected as long as it can seal and connect the external hydrogen inlet pipeline.

[0054] In some embodiments of the present invention, the material of the inner pipe 101 and the material of the outer pipe 102 are both SUS316L / BA.

[0055] The material of SUS316L / BA refers to the BA, i.e. bright annealing, of SUS316L stainless steel, which makes the surface of 316 stainless steel pipe smooth and polished. At the same time, 315L stainless steel has excellent corrosion resistance and good hydrogen barrier properties, which can effectively prevent gas leakage.

[0056] According to the hydrogen fuel cell of the second embodiment of the utility model, the pipeline system of the first embodiment is used for the hydrogen inlet pipeline of the hydrogen fuel cell. A common problem of hydrogen fuel cells is hydrogen leakage, which damages the battery or leaks to the outside to cause explosion, suffocation and other dangers. The pipeline system of the first embodiment is applied to the hydrogen inlet pipeline, so that when hydrogen is transported in the first flow channel 14, if leakage or penetration occurs, it will leak into the second flow channel 13. Since the nitrogen in the second flow channel 13 is in a circulating state, and the inner cavity of the box 106 is connected to the outer pipeline 102, the leaked hydrogen follows the circulating nitrogen into the box 106, reducing the hydrogen concentration in the second flow channel 13, thus avoiding the hydrogen in the inner pipeline 101 from leaking into the external environment, automatically processing the leaked and penetrated hydrogen, and enhancing the safety and reliability of the hydrogen fuel cell.

[0057] In some embodiments of the utility model, a pressure sensor is also provided in the hydrogen fuel cell. The pressure sensor has an alarm and shutdown function. When hydrogen leakage occurs, the inner pipeline 101 loses pressure, and the alarm and shutdown functions will be activated. This can avoid excessive leakage of hydrogen and enable the staff to detect and deal with the fault in time.

[0058] When the pipeline system of the first embodiment of the utility model is used in a hydrogen fuel cell, the portion of the inner pipeline 101 extending from the second end is also connected to a hydrogen filter to filter the hydrogen connected to the outside, thereby improving the purity of the hydrogen entering the fuel cell and protecting the hydrogen fuel cell.

[0059] It should be noted that when the pipeline system of the utility model is used in a hydrogen fuel cell, the second baffle 105 can be a part of an aluminum alloy box body, which is the outer shell of the fuel chamber of the hydrogen fuel cell. The nitrogen flow in the second flow channel 13 is stopped here, and there is air circulation in the outer shell of the fuel chamber to discharge the potential leakage of hydrogen in the fuel chamber.

[0060] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A piping system, characterized in that: include: An inner pipe, wherein a first flow channel is provided inside the inner pipe, and the first flow channel is used to transport hydrogen; An outer pipe, wherein the outer pipe is sleeved on the outside of the inner pipe, the inner wall surface of the outer pipe and the outer wall surface of the inner pipe define a second flow channel, the second flow channel is isolated from the first flow channel, the second flow channel is isolated from the external atmospheric environment, and the second flow channel is filled with nitrogen; A box, wherein the inner cavity of the box is connected to the outer pipe, and the inner cavity of the box is isolated from the external atmospheric environment; A driving device is used to drive the nitrogen to circulate between the inner cavity and the second flow channel.

2. The piping system according to claim 1, characterized in that The driving device is an air pump or a fan.

3. The piping system according to claim 1, characterized in that The pipeline system comprises: A first baffle, the box body includes the first baffle, the first baffle includes a first outer surface, the first outer surface is connected to the first end of the outer pipeline, the first baffle is provided with a first through hole, and the first through hole is used to transport the nitrogen to the outer pipeline; a second baffle, the second baffle comprising a second outer surface, the second outer surface being connected to the second end of the outer pipe, and the second baffle being provided with a second through hole; The inner pipe is inserted into the first through hole and the second through hole, and both ends of the inner pipe protrude outside the outer pipe.

4. The piping system according to claim 1, characterized in that The outer peripheral surface of the outer pipe is provided with at least one through hole, and the second flow channel is communicated with the inner cavity through the through hole.

5. The piping system according to claim 3, characterized in that The first end is provided with a first flange, the first baffle is connected to the first end through the first flange, the inner ring of the first flange is connected to the outer pipe surface, and a first sealing ring is provided between the first flange and the first baffle.

6. The piping system according to claim 3, characterized in that The second end is provided with a second flange, the second baffle is connected to the second end through the second flange, the inner ring of the second flange is connected to the inner pipe surface, and a second sealing ring is provided between the second flange and the second baffle.

7. The piping system according to claim 3, characterized in that A sealing joint is provided at one end of the inner pipe located at the first baffle, and the sealing joint is used to connect the hydrogen.

8. The piping system according to claim 7, characterized in that The sealing joint is a ferrule joint or a flange joint.

9. The piping system according to claim 1, characterized in that The material of the inner pipe and the material of the outer pipe are both SUS316L / BA.

10. A hydrogen fuel cell, characterized in that The hydrogen fuel cell comprises the pipeline system according to any one of claims 1 to 9, and the pipeline system serves as a hydrogen inlet pipeline of the hydrogen fuel cell.

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