Test manifold for fuel cells

Abstract

The utility model discloses a test manifold for fuel cell relates to fuel cell technical field, including manifold main part, manifold main part top is provided with a plurality of sealing components, sealing component includes sealing sleeve, the first sealing hole is established to sealing sleeve upper end inboard, the second sealing hole is established to sealing sleeve lower end inboard, the first sealing hole and second sealing hole inboard slidingly arranged have connecting air pipe, the upper and lower ends of connecting air pipe array are provided with a plurality of outer sealing rings and with the first sealing hole and second sealing hole inboard adhesion. The utility model discloses the cooperation design of double sealing hole and outer sealing ring, significantly improves the sealing performance, and the buckle assembly realizes the quick disassembly of air pipe, and the efficiency is effectively improved compared with traditional threaded connection.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, specifically to a test manifold for fuel cells. Background Technology

[0002] A fuel cell is an electrochemical device that directly converts the chemical energy in fuel and oxidant into electrical energy. It has advantages such as high energy conversion efficiency, clean emissions, and quiet operation. Its core consists of an anode, a cathode, and an electrolyte. During operation, hydrogen decomposes into protons and electrons at the anode. The protons migrate through the electrolyte to the cathode and react with oxygen to produce water. The electrons form an electric current through the external circuit. According to the type of electrolyte, fuel cells can be divided into proton exchange membrane fuel cells, solid oxide fuel cells, etc. They are widely used in transportation, distributed power generation, and portable power supplies, and represent an important development direction for clean energy technology.

[0003] As a crucial component of clean energy technology, fuel cells place extremely high demands on the sealing, stability, and safety of the gas delivery system during performance testing. Traditional test manifolds generally employ flanged connections, which suffer from the following technical drawbacks: 1. Insufficient sealing performance: Conventional single-layer O-ring seals are prone to leakage due to material aging after long-term use, with measured leakage rates typically exceeding 1%, severely impacting the accuracy of test data; 2. Bulky connection structure: Bolted fastening methods result in time-consuming assembly and disassembly, requiring an average of 3-5 minutes per replacement, significantly reducing testing efficiency.

[0004] Based on this, a test manifold for fuel cells is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a test manifold for fuel cells to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A test manifold for fuel cells includes a manifold body, with a plurality of sealing components disposed above the manifold body;

[0008] The sealing assembly includes a sealing sleeve, with a first sealing hole on the inner side of the upper end of the sealing sleeve and a second sealing hole on the inner side of the lower end of the sealing sleeve. A connecting air tube is slidably disposed inside the first and second sealing holes. Several outer sealing rings are arranged in an array at the upper and lower ends of the connecting air tube and fit against the inner sides of the first and second sealing holes. An inner shrinkage hole is opened in the middle of the inner side of the connecting air tube, and a lower expansion hole is opened at the lower end of the inner shrinkage hole. A snap-fit ​​assembly is provided on one side of the upper end of the sealing sleeve, and a snap-fit ​​post is provided on one side of the upper end of the connecting air tube.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0010] In one alternative: the inner contraction hole is a contraction hole with a lower contraction angle of 20°, and the lower expansion hole is an expansion hole with a lower expansion angle of 10°.

[0011] In one alternative embodiment: the buckle assembly includes a limiting groove, which is formed on one side of the upper end of the sealing sleeve. The inner side of the limiting groove is slidably connected to the buckle post. Two limiting blocks are symmetrically arranged through the upper sides of the limiting groove. A spring is fixedly connected to the adjacent end of each of the two limiting blocks and the sealing sleeve. One end of each of the two springs is fixedly connected to one side of the adjacent sealing sleeve. A push plate is fixedly connected to the upper side of each of the two inclined sides. The upper ends of the push plates are respectively arranged through the upper surface of the sealing sleeve and slidably connected to the upper surface of the sealing sleeve.

[0012] In one alternative: both of the two limiting blocks have a beveled edge at one adjacent end.

[0013] In one alternative: an internal threaded hole is provided on one side of the lower end of the sealing sleeve, and a threaded post is threadedly connected to the internal threaded hole. A pressure sensor is fixedly connected to one end of the threaded post inside the sealing sleeve.

[0014] In one alternative: an inner insulator is slidably disposed on the inner side of the manifold body and fits against the outer side of the inner insulator; a fixing plate is provided at the lower end of both the manifold body and the inner insulator; and a plurality of fixing holes are provided on the surface of the fixing plate.

[0015] In one alternative: the manifold body is made of 6061-T6 aluminum alloy and has a ceramic coating on the inside.

[0016] In one alternative: the inner insulator is made of polytetrafluoroethylene.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention significantly improves sealing performance through the combination of double sealing holes and an outer sealing ring; the snap-fit ​​assembly enables quick assembly and disassembly of the air tube, effectively improving efficiency compared to traditional threaded connections; the threaded post incorporates a high-precision air pressure sensor to monitor air pressure fluctuations in real time, ensuring safety; the Venturi structure's inner constriction hole and lower expansion hole work together to optimize airflow, greatly increasing the gas velocity; the overall structure uses 6061-T6 aluminum alloy and a quick-release design, combining lightweight design with ease of maintenance, significantly reducing testing costs and time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram showing the disassembled main structure of the manifold of this utility model.

[0021] Figure 3 This is a schematic diagram of the sealing component structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the buckle assembly structure of this utility model.

[0023] Figure reference numerals: 1. Manifold body; 2. Sealing sleeve; 3. Connecting air pipe; 4. Inner insulator; 5. Fixing plate; 6. Fixing hole; 7. First sealing hole; 8. Second sealing hole; 9. Internal threaded hole; 10. Threaded post; 11. Inner contraction hole; 12. Outer sealing ring; 13. Limiting block; 14. Bevel; 15. Push plate; 16. Spring; 17. Limiting groove; 18. Lower expansion hole; 19. Air pressure sensor; 20. Snap-on post. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] In one embodiment, such as Figures 1-4 As shown, a test manifold for fuel cells includes a manifold body 1, and a plurality of sealing components are disposed above the manifold body 1.

[0026] The sealing assembly includes a sealing sleeve 2, with a first sealing hole 7 on the inner side of the upper end of the sealing sleeve 2 and a second sealing hole 8 on the inner side of the lower end of the sealing sleeve 2. A connecting air pipe 3 is slidably disposed inside the first sealing hole 7 and the second sealing hole 8. Several outer sealing rings 12 are arranged in an array at the upper and lower ends of the connecting air pipe 3 and fit against the inner side of the first sealing hole 7 and the second sealing hole 8. The outer sealing rings 12 are made of fluororubber. An inner shrinkage hole 11 is opened in the middle of the inner side of the connecting air pipe 3. A lower expansion hole 18 is opened at the lower end of the inner shrinkage hole 11. A buckle assembly is provided on one side of the upper end of the sealing sleeve 2, and a buckle post 20 is provided on one side of the upper end of the connecting air pipe 3.

[0027] In this embodiment, the test manifold forms a double sealing structure with the outer sealing ring 12 of the connecting air pipe 3 through the first sealing hole 7 and the second sealing hole 8 in the sealing sleeve 2. The inner shrinkage hole 11 and the lower expansion hole 18 of the connecting air pipe 3 constitute a Venturi structure. When the airflow passes through, it first accelerates and then decelerates to achieve pressure stability. The buckle assembly achieves quick locking by cooperating with the limiting groove 17 of the sealing sleeve 2 through the buckle post 20.

[0028] In one embodiment, such as Figure 3As shown, the inner constriction orifice 11 is a constriction orifice with a lower constriction angle of 20°, and the lower expansion orifice 18 is an expansion orifice with a lower expansion angle of 10°. The inner constriction orifice 11 adopts a 20° constriction angle design to generate moderate acceleration when the airflow passes through it, while the lower expansion orifice 18 maintains a 10° expansion angle to make the airflow decelerate smoothly, reduce turbulence generation, and ensure a stable transition of air pressure during the test.

[0029] In one embodiment, such as Figure 4 As shown, the buckle assembly includes a limiting groove 17, which is formed on one side of the upper end of the sealing sleeve 2. The inner side of the limiting groove 17 is slidably connected to the buckle post 20. Two limiting blocks 13 are symmetrically arranged through the upper sides of the limiting groove 17. A spring 16 is fixedly connected to the adjacent end of each of the two limiting blocks 13 and the sealing sleeve 2. One end of each of the two springs 16 is fixedly connected to one side of the adjacent sealing sleeve 2. A push plate 15 is fixedly connected to the upper side of one end of each of the two inclined sides 14. The upper end of each push plate 15 is slidably connected to the upper surface of the sealing sleeve 2. When the buckle assembly is working, pressing the push plate 15 pushes the inclined side 14 of the limiting block 13, causing the limiting block 13 to compress the spring 16 and retract inward. At this time, the buckle post 20 can be inserted or pulled out. After releasing the push plate 15, the spring 16 rebounds and the limiting block 13 returns to its original position, locking the buckle post 20 in the limiting groove 17, thus achieving quick assembly and disassembly.

[0030] In one embodiment, such as Figure 4 As shown, each of the two limiting blocks 13 has a beveled edge 14 at one of its adjacent ends. The beveled edge 14 of the limiting block 13 is designed to convert the vertical downward pressure of the push plate 15 into the horizontal displacement of the limiting block 13. This reduces the operating force through the lever principle and ensures that the force is even when the buckle post 20 is locked.

[0031] In one embodiment, such as Figure 1 As shown, an internal threaded hole 9 is provided on one side of the lower end of the sealing sleeve 2. A threaded post 10 is threadedly connected to the internal threaded hole 9. A pressure sensor 19 is fixedly connected to one end of the threaded post 10 inside the sealing sleeve 2. The threaded post 10 is screwed into the sealing sleeve 2 through the internal threaded hole 9. The pressure sensor 19 at its end directly contacts the internal airflow and converts the pressure signal into an electrical signal for output, thereby realizing real-time pressure monitoring. The threaded connection method facilitates sensor calibration and maintenance.

[0032] In one embodiment, such as Figure 1As shown, an inner insulator 4 is slidably disposed on the inner side of the manifold body 1 and is attached to the outer side of the inner insulator 4. A fixing plate 5 is provided at the lower end of both the manifold body 1 and the inner insulator 4. Several fixing holes 6 are opened on the surface of the fixing plate 5. The inner insulator 4 and the manifold body 1 are slidably engaged, which not only ensures electrical isolation but also facilitates replacement. The fixing plate 5 is connected to the test bench through the fixing holes 6 to ensure the stability of the entire manifold during operation.

[0033] In one embodiment, such as Figure 1 As shown, the manifold body 1 is made of 6061-T6 aluminum alloy and has a ceramic coating on the inside. The 6061-T6 aluminum alloy manifold body 1 provides high-strength support, and the inner ceramic coating not only enhances corrosion resistance, but also forms a double insulation barrier with the PTFE inner insulator 4.

[0034] In one embodiment, such as Figure 1 As shown, the inner insulator 4 is made of polytetrafluoroethylene, which improves the insulation effect.

[0035] The above embodiments disclose a test manifold for fuel cells. When the fuel cell test manifold is working, the gas to be tested first enters the connecting gas pipe 3. When it flows through the inner constriction orifice 11, it is accelerated due to the cross-sectional contraction, and the pressure energy is converted into kinetic energy. Subsequently, when it passes through the lower expansion orifice 18, the cross-section expands, the airflow decelerates and the pressure is restored. The sealing system consists of a first sealing hole 7, a second sealing hole 8 and an outer sealing ring 12 on the connecting gas pipe 3, forming a double sealing barrier. The snap-fit ​​mechanism is designed with a beveled edge 14 and a limit block 13, and works with a push plate 15 and a spring 16 to achieve quick assembly and disassembly. The pressure sensor 19 accurately monitors the pressure. The manifold body 1 and the inner insulator 4 form double insulation. The fixing plate 5 ensures the stability of the system through the fixing hole 6.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A test manifold for fuel cells, comprising a manifold body (1) and a plurality of sealing assemblies disposed above the manifold body (1); Its features are, The sealing assembly includes a sealing sleeve (2), a first sealing hole (7) is provided on the inner side of the upper end of the sealing sleeve (2), a second sealing hole (8) is provided on the inner side of the lower end of the sealing sleeve (2), a connecting air pipe (3) is slidably arranged on the inner side of the first sealing hole (7) and the second sealing hole (8), a plurality of outer sealing rings (12) are arranged in an array at the upper and lower ends of the connecting air pipe (3) and fit against the inner side of the first sealing hole (7) and the second sealing hole (8), an inner shrinking hole (11) is provided in the middle of the inner side of the connecting air pipe (3), a lower expansion hole (18) is provided at the lower end of the inner shrinking hole (11), a buckle assembly is provided on one side of the upper end of the sealing sleeve (2), and a buckle post (20) is provided on one side of the upper end of the connecting air pipe (3).

2. The test manifold for fuel cells according to claim 1, characterized in that, The inner shrinkage hole (11) is a shrinkage hole with a shrinkage angle of 20° at the lower end, and the lower expansion hole (18) is an expansion hole with an expansion angle of 10° at the lower end.

3. The test manifold for fuel cells according to claim 1, characterized in that, The buckle assembly includes a limiting groove (17), which is opened on one side of the upper end of the sealing sleeve (2). The inner side of the limiting groove (17) is slidably connected to the buckle post (20). Two limiting blocks (13) are symmetrically arranged through the upper sides of the limiting groove (17). A spring (16) is fixedly connected to the adjacent end of the two limiting blocks (13) and the sealing sleeve (2). One end of the two springs (16) is fixedly connected to one side of the adjacent sealing sleeve (2). An inclined side (14) is provided at the adjacent end of the two limiting blocks (13). A push plate (15) is fixedly connected to the upper side of one end of the two inclined sides (14). The upper end of the push plate (15) is respectively arranged through the upper surface of the sealing sleeve (2) and slidably connected to the upper surface of the sealing sleeve (2).

4. The test manifold for fuel cells according to claim 1, characterized in that, The sealing sleeve (2) has an internal threaded hole (9) on one side of its lower end. The internal threaded hole (9) is threaded with a threaded post (10). The threaded post (10) is fixedly connected to a pressure sensor (19) at one end inside the sealing sleeve (2).

5. The test manifold for fuel cells according to claim 1, characterized in that, The manifold body (1) has an inner insulator (4) that slides on its inner side and is attached to the outer side of the inner insulator (4). The lower ends of the manifold body (1) and the inner insulator (4) are both provided with fixing plates (5), and the surface of the fixing plates (5) is provided with several fixing holes (6).

6. The test manifold for fuel cells according to claim 5, characterized in that, The manifold body (1) is made of 6061-T6 aluminum alloy and has a ceramic coating on the inside.

7. The test manifold for fuel cells according to claim 6, characterized in that, The inner insulator (4) is made of polytetrafluoroethylene.

Images