Fuel cell hydrogen circulation check valve structure

Abstract

The utility model relates to the field of fuel cells, in particular to a fuel cell hydrogen circulation check valve structure which comprises a gas outlet lower pipe and an adjusting plate, an inner ring seat is installed on the inner side wall of the gas outlet lower pipe, fixing grooves are formed in the upper end face of the inner ring seat in a bilateral symmetry mode, and adjusting rods are installed in the fixing grooves in a sliding fit mode. According to the device, the adjusting plate structure is adopted, so that backflow of hydrogen can be avoided, the pressure sensor and the indicator lamp structure are adopted, the sealing state in the lower gas outlet pipe can be directly and clearly known, the abnormal working state of the adjusting plate can be conveniently found, and the working efficiency of the device is improved. Therefore, the disassembly and maintenance treatment is performed.

Description

Technical Field

[0001] This utility model relates to the field of fuel cells, specifically to a fuel cell hydrogen circulation check valve structure. Background Technology

[0002] With the continuous growth of my country's national economy and the constant improvement of people's living standards, automobiles have become an essential tool for travel. New energy vehicles are considered a crucial link in the energy transition, and proton exchange membrane fuel cell vehicles are considered the most mature representative of new energy vehicle power generation. They generate electricity through a chemical reaction between hydrogen and oxygen in the air, thus propelling the vehicle forward. They possess a series of advantages, including simple structure, no air pollution, and high energy efficiency. Fuel cell vehicles produce virtually no carbon dioxide. As a new generation of new energy vehicles, system optimization and the design and development of key components can extend the lifespan of the fuel cell power system.

[0003] A Chinese patent discloses a hydrogen circulation check valve and fuel cell system for fuel cells (authorization announcement number CN217762225 U). This patented technology can solve problems such as the check valve structure being too complex and the unreliability of the snap-fit ​​method for fixing the sealing diaphragm.

[0004] The existing sealing strips lack shock absorption and buffering structures, making it easy for the connection structure to be damaged when the hydrogen flow rate is too high, and the problem is difficult to detect. Utility Model Content

[0005] To solve the above technical problems, this utility model provides a fuel cell hydrogen circulation check valve structure, including a lower outlet pipe and an adjusting plate. An inner ring seat is installed on the inner side wall of the lower outlet pipe. The upper end face of the inner ring seat is symmetrically provided with fixing grooves. An adjusting rod is installed in the fixing groove by sliding fit. An adjusting plate is installed on the upper end face of the adjusting rod. The diameter of the adjusting plate is smaller than the inner diameter of the lower outlet pipe.

[0006] Preferably, a pressure sensor is installed at the bottom of the fixed groove, an indicator light is installed on the outer wall of the lower air outlet pipe, a housing is installed on the outer wall of the lower air outlet pipe, a control panel is arranged inside the housing, and the control panel is electrically connected to the indicator light and the pressure sensor.

[0007] Preferably, an upper air outlet pipe is installed on the upper end face of the lower air outlet pipe via a threaded connection, and a sealing gasket is installed on the outer side wall of the upper air outlet pipe.

[0008] Preferred configuration: A top frame is arranged inside the exhaust pipe. Multiple damping spring shock absorbers are installed at the bottom of the top frame along its circumferential direction. The damping spring shock absorbers are arranged at an angle. An inclined ring plate is installed at the other end of the damping spring shock absorber. A sponge pad is installed at the bottom of the top frame. A fixed cone is installed on the upper surface of the adjusting plate.

[0009] The technical effects and advantages of this utility model are as follows:

[0010] 1. This utility model adopts an adjustment plate structure, which can prevent hydrogen backflow. It also adopts a pressure sensor and indicator light structure, which can directly and clearly understand the sealing status in the lower outlet pipe, making it easy to detect abnormalities in the operation of the adjustment plate and thus carry out disassembly and maintenance.

[0011] 2. This utility model adopts a damping spring shock absorber and an inclined ring plate structure to carry out shock absorption and protection treatment, preventing the adjusting rod from moving upward and falling off. The sponge pad further improves the overall shock absorption effect of the device and ensures its service life. Attached Figure Description

[0012] Figure 1 This is a front view of a fuel cell hydrogen circulation check valve structure provided in an embodiment of this application;

[0013] Figure 2 This is a cross-sectional front view of a hydrogen recirculation check valve structure for a fuel cell provided in an embodiment of this application;

[0014] Figure 3 This application provides an embodiment of a fuel cell hydrogen recirculation check valve structure. Figure 2 A magnified view of a portion of region A in the middle;

[0015] Figure 4 This is a bottom cross-sectional view of a hydrogen recirculation check valve structure for a fuel cell provided in an embodiment of this application;

[0016] Figure 5 This application provides an embodiment of a fuel cell hydrogen recirculation check valve structure. Figure 4 A magnified view of a portion of region B in the middle;

[0017] In the diagram: 1. Lower exhaust pipe; 2. Adjusting plate; 11. Inner ring seat; 12. Adjusting rod; 13. Pressure sensor; 14. Indicator light; 15. Control panel; 16. Upper exhaust pipe; 17. Sealing gasket; 18. Top frame; 19. Damping spring shock absorber; 21. Inclined ring plate; 22. Sponge pad; 23. Fixed cone. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0019] Please see Figures 1-5 This embodiment provides a hydrogen recirculation check valve structure for a fuel cell, including a lower outlet pipe 1 and an adjusting plate 2. An inner ring seat 11 is installed on the inner side wall of the lower outlet pipe 1. The upper end face of the inner ring seat 11 is symmetrically provided with fixing grooves. An adjusting rod 12 is installed in the fixing groove by sliding fit. The adjusting plate 2 is installed on the upper end face of the adjusting rod 12. The diameter of the adjusting plate 2 is smaller than the inner diameter of the lower outlet pipe 1. During operation, hydrogen enters through the bottom of the lower outlet pipe 1, thereby lifting the adjusting plate 2 and allowing the hydrogen to be discharged through the gap. When the hydrogen flows back, the adjusting plate 2 moves down and presses against the inner ring seat 11, thereby sealing the lower outlet pipe 1 and preventing hydrogen backflow.

[0020] A pressure sensor 13 is installed at the bottom of the fixed groove, and an indicator light 14 is installed on the outer wall of the lower air outlet pipe 1. A housing is installed on the outer wall of the lower air outlet pipe 1, and a control panel 15 is arranged inside the housing. The control panel 15 is electrically connected to the indicator light 14 and the pressure sensor 13. During operation, a PLC program is written in the control panel 15 to control the operation of each device. When the adjusting plate 2 is reset, the adjusting rod 12 moves down and presses against the pressure sensor 13 to seal the lower air outlet pipe 1. At this time, the control panel 15 receives a signal, and the indicator light 14 turns green. When the adjusting rod 12 moves up, the pressure of the pressure sensor 13 disappears, and the control panel 15 turns the indicator light 14 red. This allows for a direct and clear understanding of the sealing state inside the lower air outlet pipe 1, making it easier to detect any abnormalities in the operation of the adjusting plate 2 and to perform disassembly and maintenance.

[0021] The upper end face of the lower outlet pipe 1 is screwed and rotated to install the upper outlet pipe 16. A sealing gasket 17 is installed on the outer wall of the upper outlet pipe 16. During operation, the lower outlet pipe 1 is fixed by threads, which makes it easy to disassemble the lower outlet pipe 1 for inspection and maintenance of its internal structure. The sealing gasket 17 can seal and protect the connection of the upper outlet pipe 16 to prevent gas leakage.

[0022] Therefore, a top frame 18 is arranged inside the lower exhaust pipe 1. Multiple damping spring shock absorbers 19 are installed at the bottom of the top frame 18 along its circumferential direction. The damping spring shock absorbers 19 are arranged at an angle. An inclined ring plate 21 is installed at the other end of the damping spring shock absorber 19. A sponge pad 22 is installed at the bottom of the top frame 18. A fixed cone 23 is installed on the upper surface of the adjusting plate 2. When working, when the adjusting plate 2 moves upward, it drives the fixed cone 23 to move upward. The fixed cone 23 is in close contact with the inclined ring plate 21, causing the damping spring shock absorber 19 to contract, thereby performing shock absorption protection treatment and preventing the adjusting rod 12 from moving upward and falling off. At the same time, the fixed cone 23 presses against the bottom of the sponge pad 22, further improving the overall shock absorption effect of the device and ensuring its service life.

[0023] In actual operation, hydrogen enters through the bottom of the lower outlet pipe 1, thereby lifting the regulating plate 2 and allowing the hydrogen to be discharged through the gap. When the hydrogen flows back, the regulating plate 2 moves down and presses against the inner ring seat 11, thereby sealing the lower outlet pipe 1 and preventing the hydrogen from flowing back.

[0024] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A fuel cell hydrogen circulation check valve structure comprising a gas outlet lower pipe (1) and a regulating plate (2), characterized in that, The inner side wall of the air outlet lower pipe (1) is provided with an inner ring seat (11), the upper end surface of the inner ring seat (11) is symmetrically provided with a fixing groove, the fixing groove is provided with an adjusting rod (12) through sliding fit, the upper end surface of the adjusting rod (12) is provided with an adjusting plate (2), and the diameter of the adjusting plate (2) is smaller than the inner diameter of the air outlet lower pipe (1).

2. A fuel cell hydrogen circulation check valve structure according to claim 1, characterized by The bottom of the fixing groove is provided with a pressure sensor (13), and the outer side wall of the air outlet lower pipe (1) is provided with an indicating lamp (14).

3. The fuel cell hydrogen circulation check valve structure according to claim 1, wherein The outer side wall of the air outlet lower pipe (1) is provided with a shell, the shell is provided with a control panel (15), and the control panel (15) is electrically connected with the indicating lamp (14) and the pressure sensor (13).

4. The fuel cell hydrogen circulation check valve structure according to claim 1, wherein The upper end surface of the air outlet lower pipe (1) is provided with an air outlet upper pipe (16) through threaded rotation, and the outer side wall of the air outlet upper pipe (16) is provided with a sealing gasket (17).

5. A fuel cell hydrogen circulation check valve structure according to claim 4, wherein Therefore, the air outlet lower pipe (1) is provided with a top frame (18), the bottom of the top frame (18) is provided with a plurality of damping spring shock absorbers (19) along the circumferential direction, the damping spring shock absorbers (19) are inclined, and the other end of the damping spring shock absorber (19) is provided with an inclined ring plate (21).

6. A fuel cell hydrogen circulation check valve structure according to claim 5, wherein The bottom of the top frame (18) is provided with a sponge pad (22), and the upper end surface of the adjusting plate (2) is provided with a fixed cone (23).

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