Fuel cell end plate outlet connection structure

Abstract

The application relates to a fuel cell end plate outlet connecting structure, which comprises an end plate and a joint pipe, the end plate is provided with an outlet hole for connecting the joint pipe, and the outlet connecting structure further comprises a ring-shaped convex edge and a ring-shaped clamping piece; the ring-shaped convex edge is arranged at one end edge of the outlet hole; one end of the joint pipe is nested and clamped outside the ring-shaped convex edge; and the ring-shaped clamping piece is sleeved outside the joint pipe, so that one end of the joint pipe is clamped between the outer wall of the ring-shaped convex edge and the inner wall of the ring-shaped clamping piece. Compared with the prior art, the application has the advantages of simple installation mode, firm and stable connecting structure and the like.

Description

Technical Field

[0001] This invention relates to the field of fuel cells, and in particular to a fuel cell endplate outlet connection structure. Background Technology

[0002] The end plates of the fuel cell are located on both sides of the core, and each end plate has various outlet holes for water inlet, water outlet, air inlet, and air outlet. These outlet holes are used to connect to external connector pipes. Current connection methods often involve directly inserting the connector pipe into the outlet hole, resulting in low sealing and connection strength, making it prone to detachment. To overcome this problem, existing connector pipes and outlet holes also employ complex connection mechanisms, but these often lead to inconvenient installation and operation, and are difficult to replace and maintain. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a fuel cell endplate outlet connection structure that improves connection stability and ease of operation.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A fuel cell end plate outlet connection structure includes an end plate and a connector tube. The end plate has an outlet hole for connecting the connector tube. The outlet connection structure further includes an annular protrusion and an annular clamping member. The annular protrusion is disposed at one end edge of the outlet hole. One end of the connector tube is nested and snapped into the outer ring of the annular protrusion. The annular clamping member is sleeved on the outside of the connector tube, so that one end of the connector tube is clamped between the outer wall of the annular protrusion and the inner wall of the annular clamping member.

[0006] Optionally, the annular protrusion and the end plate are an integral structure.

[0007] Optionally, it also includes a covering material layer that covers the annular protrusion, the inner wall of the outlet hole, and the edge of the end plate at the other end of the outlet hole. The covering material layer forms a protrusion on the outer side of the annular protrusion for fitting a groove on the inner wall of one end of the connector pipe.

[0008] Optionally, the annular protrusion and the end plate are separate structures, and a limiting tube is provided inside the outlet hole for interference fit connection, with one end of the limiting tube extending out of the outlet hole to form an annular protrusion.

[0009] Optionally, the other end of the limiting tube is provided with a baffle that fits against one side of the end plate.

[0010] Optionally, the limiting tube is wrapped with a covering material layer, and the covering material layer forms a protrusion on the outside of the annular convex edge for fitting groove on the inner wall of one end of the connector tube.

[0011] Optionally, the annular protrusion and the end plate are separate structures. The annular protrusion is connected to a tubular component, and one end of the tubular component is provided with a limiting plate. The tubular component passes through the outlet hole so that the edge of the outlet hole is fixed between the annular protrusion and the limiting plate.

[0012] Optionally, the inner wall of the annular clamp is provided with a pattern to increase the friction between the annular clamp and the connector pipe.

[0013] Optionally, the annular clamp is fixed to the end plate by bolts.

[0014] Optionally, the coating material layer is an injection-molded plastic layer, a UV-cured resin layer, a synthetic rubber layer, or a ceramic layer.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention is designed with an annular protrusion and an annular clamp at the outlet hole. The annular protrusion engages one end of the connector pipe, and the annular clamp ensures fixation. The installation method is simple and the connection structure is firm and stable.

[0017] 2. A covering material layer can be set at the annular protrusion and the outlet hole. The protrusion used for snap-fit ​​is set on the covering material layer to ensure that the structure is wear-resistant and tough, and can also significantly improve the corrosion resistance of the connection.

[0018] 3. The annular convex edge and end plate are separate structures, which reduces the difficulty of manufacturing process and also facilitates replacement after damage, providing good flexibility.

[0019] 4. The inner wall of the annular clamp is patterned to increase the friction between it and the connector pipe, thereby improving the connection strength.

[0020] 5. The ring clamp and end plate are connected by bolts to further improve the connection strength. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0022] Figure 2 This is a schematic diagram of the structure of Example 2.

[0023] Figure 3 This is a schematic diagram of the structure of Example 3.

[0024] Reference numerals: 1. End plate; 101. Outlet hole; 2. Connector pipe; 3. Annular protrusion; 4. Annular clamp; 5. Covering material layer; 6. End plate edge; 7. Protrusion; 8. Fitting groove; 9. Limiting pipe; 10. Baffle; 11. Tubular component; 12. Limiting plate; 13. Bolt. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment provides a fuel cell endplate outlet connection structure, including an endplate 1 and a connector tube 2. The endplate 1 has an outlet hole 101 for connecting the connector tube 2. The outlet connection structure also includes an annular protrusion 3 and an annular clamping member 4. The annular protrusion 3 is disposed at one end edge of the outlet hole 101, and the annular protrusion 3 and the endplate 1 are integrally formed. One end of the connector tube 2 is nested and engaged with the outer ring of the annular protrusion 3, allowing the connector tube 2 to align with the outlet hole 101. The annular clamping member 4 is sleeved on the outside of the connector tube 2, clamping one end of the connector tube 2 between the outer wall of the annular protrusion 3 and the inner wall of the annular clamping member 4.

[0028] In this embodiment, the outlet connection structure further includes a covering material layer 5, which covers the annular protrusion 3, the inner wall of the outlet hole 101, and the edge 6 of the end plate at one end of the outlet hole 101. The covering material layer 5 forms a protrusion 7 on the outer side of the annular protrusion 3, and a fitting groove 8 is provided on the inner wall of one end of the connector pipe 2. The protrusion 7 and the fitting groove 8 form a snap-fit ​​structure. The covering material layer 5 can be made of a general wear-resistant material, such as an injection-molded plastic layer, a light-cured resin layer, a synthetic rubber layer, or a ceramic layer, as long as it has insulation and a certain mechanical strength. In this embodiment, an injection-molded plastic layer is preferred. The covering material layer 5 ensures the structure's wear resistance and good toughness, and also significantly improves the corrosion resistance of the connection. In this embodiment, to reduce the flow resistance of the fluid transitioning between the connector pipe 2 and the outlet hole 101, the covering material layer 5 can be designed as a slope (not shown in the figure) to achieve a gradual change in the cross-sectional area of ​​the fluid channel. The annular protrusion 3 within the covering material layer 5 can also be designed with a corresponding slope.

[0029] In this embodiment, the inner wall of the annular clamp 4 is patterned to increase the friction between the annular clamp 4 and the connector pipe 2, thereby improving their connection strength. The annular clamp 4 also has through holes, through which bolts 13 can be used to fix the annular clamp 4 to the end plate 1, further enhancing the connection strength.

[0030] Example 2

[0031] like Figure 2As shown, this embodiment provides a fuel cell endplate outlet connection structure, including an endplate 1 and a connector tube 2. The endplate 1 has an outlet hole 101 for connecting the connector tube 2. The outlet connection structure also includes an annular protrusion 3 and an annular clamping member 4. The annular protrusion 3 is located at one end edge of the outlet hole 101, and the annular protrusion 3 and the endplate 1 are separate structures. Specifically, a limiting tube 9 is provided inside the outlet hole 101 and is interference-fitted to it. One end of the limiting tube 9 extends from the outlet hole 101 to form the annular protrusion 3. One end of the connector tube 2 is nested and engaged with the outer ring of the annular protrusion 3, allowing the connector tube 2 to mate with the outlet hole 101. The annular clamping member 4 is sleeved on the outside of the connector tube 2, clamping one end of the connector tube 2 between the outer wall of the annular protrusion 3 and the inner wall of the annular clamping member 4.

[0032] In this embodiment, a baffle 10 is provided at the lower end of the limiting tube 9. The baffle 10 is used to fit one side of the end face of the end plate 1 so that the limiting tube 9 can be smoothly positioned after being inserted into the outlet hole 101.

[0033] In this embodiment, the limiting tube 9 is wrapped with a covering material layer 5. The covering material layer 5 forms a protrusion on the outside of the annular convex edge 3 to serve as the fitting groove 8 on the inner wall of one end of the connector tube 2. The covering material layer 5 forms a protrusion 7 on the outside of the annular convex edge 3, and a fitting groove 8 is provided on the inner wall of one end of the connector tube 2. The protrusion 7 and the fitting groove 8 form a snap-fit ​​structure. The covering material layer 5 can be made of a general wear-resistant material, such as an injection-molded plastic layer, a UV-cured resin layer, a synthetic rubber layer, or a ceramic layer, as long as it has insulation and a certain mechanical strength. In this embodiment, an injection-molded plastic layer is preferred. The covering material layer 5 ensures that the structure is wear-resistant and has good toughness, and can also significantly improve the corrosion resistance of the connection.

[0034] In this embodiment, the inner wall of the annular clamp 4 is patterned to increase the friction between the annular clamp 4 and the connector pipe 2, thereby improving their connection strength. The annular clamp 4 also has through holes, through which bolts 13 can be used to fix the annular clamp 4 to the end plate 1, further enhancing the connection strength.

[0035] Example 3

[0036] like Figure 3As shown, this embodiment provides a fuel cell endplate outlet connection structure, including an endplate 1 and a connector tube 2. The endplate 1 has an outlet hole 101 for connecting the connector tube 2. The outlet connection structure also includes an annular protrusion 3 and an annular clamping member 4. The annular protrusion 3 is located at one edge of the outlet hole 101, and the annular protrusion 3 and the endplate 1 are separate structures. Specifically, the annular protrusion 3 is connected to a tubular member 11, one end of which has a limiting plate 12. The tubular member 11 passes through the outlet hole 101, fixing the edge of the outlet hole 101 between the annular protrusion 3 and the limiting plate 12. This structure allows the annular protrusion 3 to be securely fastened to the outlet hole 101. One end of the connector tube 2 is nested and snapped into the outer ring of the annular protrusion 3, allowing the connector tube 2 to align with the outlet hole 101. The annular clamping member 4 is sleeved on the outside of the connector tube 2, clamping one end of the connector tube 2 between the outer wall of the annular protrusion 3 and the inner wall of the annular clamping member 4.

[0037] In this embodiment, the outer surface of the annular convex edge 3 is wrapped with a covering material layer 5, while the tubular component 11 and the limiting plate 12 are directly formed by the covering material layer 5. The covering material layer 5 forms a protrusion on the outer side of the annular convex edge 3, for use in the fitting groove 8 on one end of the inner wall of the connector tube 2. The covering material layer 5 also forms a protrusion 7 on the outer side of the annular convex edge 3, and a fitting groove 8 is provided on one end of the inner wall of the connector tube 2; the protrusion 7 and the fitting groove 8 form a snap-fit ​​structure. The covering material layer 5 can be made of a general wear-resistant material, such as an injection-molded plastic layer, a UV-cured resin layer, a synthetic rubber layer, or a ceramic layer, as long as it has insulation and a certain mechanical strength. In this embodiment, an injection-molded plastic layer is preferred. The covering material layer 5 ensures the structure's wear resistance and good toughness, and also significantly improves the corrosion resistance of the connection.

[0038] In this embodiment, the annular clamp 4 is also provided with a through hole, through which the annular clamp 4 can be fixed to the end plate 1 by bolt 13, thereby further improving the connection strength.

[0039] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A fuel cell end plate outlet connection structure, comprising an end plate (1) and a connector pipe (2), wherein the end plate (1) is provided with an outlet hole (101) for connecting the connector pipe (2), characterized in that, The outlet connection structure also includes an annular protrusion (3) and an annular clamp (4). The annular protrusion (3) is located at one end edge of the outlet hole (101). One end of the connector tube (2) is nested and clamped on the outer ring of the annular protrusion (3). The annular clamp (4) is sleeved on the outside of the connector tube (2), so that one end of the connector tube (2) is clamped between the outer wall of the annular protrusion (3) and the inner wall of the annular clamp (4). The annular protruding edge (3) and the end plate (1) are an integral structure; It also includes a covering material layer (5), which covers the annular protrusion (3), the inner wall of the outlet hole (101), and the edge (6) of the end plate at the other end of the outlet hole (101). The covering material layer (5) forms a protrusion (7) on the outside of the annular protrusion (3) for fitting groove (8) on the inner wall of one end of the connector pipe (2). Alternatively, the annular protrusion (3) and the end plate (1) are separate structures, and a limiting tube (9) is provided in the outlet hole (101) and is connected to it with an interference fit. One end of the limiting tube (9) extends out from the outlet hole (101) to form the annular protrusion (3). The other end of the limiting tube (9) is provided with a baffle (10), which is attached to one side end face of the end plate (1); The limiting tube (9) is wrapped with a covering material layer (5), and the covering material layer (5) forms a protrusion (7) on the outside of the annular protrusion (3) for connecting the fitting groove (8) on the inner wall of one end of the connector tube (2).

2. The fuel cell endplate outlet connection structure according to claim 1, characterized in that, The annular protrusion (3) and the end plate (1) are separate structures. The annular protrusion (3) is connected to a tubular component (11). One end of the tubular component (11) is provided with a limiting plate (12). The tubular component (11) passes through the outlet hole (101) so that the edge of the outlet hole (101) is fixed between the annular protrusion (3) and the limiting plate (12). The annular protrusion (3) is wrapped with a covering material layer (5), while the tubular part (11) and the limiting plate (12) are directly composed of the covering material layer (5). The covering material layer (5) forms a protrusion (7) on the outside of the annular protrusion (3), and a fitting groove (8) is provided on the inner wall of one end of the butt joint pipe (2). The protrusion (7) and the fitting groove (8) form a snap-fit ​​structure with each other.

3. The fuel cell endplate outlet connection structure according to claim 1, characterized in that, The inner wall of the annular clamp (4) is provided with a pattern to increase the friction between the annular clamp (4) and the connector pipe (2).

4. A fuel cell endplate outlet connection structure according to any one of claims 1 to 3, characterized in that, The annular clamp (4) is fixed to the end plate (1) by bolts (13).

5. The fuel cell endplate outlet connection structure according to claim 1, characterized in that, The coating material layer (5) is an injection-molded plastic layer, a photocurable resin layer, a synthetic rubber layer, or a ceramic layer.

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