Pressure reducing line for fuel cell testing apparatus and fuel cell testing apparatus

Abstract

The utility model belongs to fuel cell test technical field especially relates to a kind of pressure reducing pipeline and fuel cell testing device for fuel cell testing device, the utility model provides a kind of pressure reducing pipeline for fuel cell testing device, comprising: pipeline connecting plate, air inlet pipe, diaphragm valve, pressure reducing valve, gas guide pipe, pressure relief valve and emptying pipe, the diaphragm valve and the pressure reducing valve are all fixed on pipeline connecting plate, the diaphragm valve is respectively connected with emptying pipe and the air inlet pipe in vertical direction both ends, diaphragm valve is connected with the gas guide pipe in horizontal direction one end, pressure reducing valve is connected on gas guide pipe, the gas guide pipe is connected with four-way joint in the diaphragm valve one end, the pressure relief valve is located on the four-way joint, and the position opposite with pressure relief valve is connected with air outlet pipe on the four-way joint, and air outlet pipe is used to transport the gas after pressure reduction. The utility model can realize seamless switching of gas cylinder, improve the accuracy of fuel cell test system.

Description

Technical Field

[0001] This utility model belongs to the field of fuel cell testing technology, and in particular relates to a pressure reduction pipeline for a fuel cell testing device and a fuel cell testing device. Background Technology

[0002] With the widespread application of hydrogen fuel cell technology in new energy vehicles, distributed energy, and industrial backup power, the stability and range of the hydrogen supply system have become key factors restricting equipment performance. Traditional hydrogen fuel cell testing systems mostly adopt a single-cylinder supply mode, supplying hydrogen to the testing equipment through a multi-stage pressure-reducing pipeline assembly from a high-pressure hydrogen cylinder. However, this mode has significant drawbacks: when a single cylinder is depleted, the equipment must be paused to replace the hydrogen cylinder. This not only introduces outside air into the testing pipeline during cylinder replacement, affecting the accuracy of the test, but also the discontinuity of the test process affects its accuracy. Utility Model Content

[0003] In view of this, the present invention provides a pressure reducing pipeline and a fuel cell testing device for a fuel cell testing device, which solves the problem that the accuracy of testing is affected when changing the fuel cell in the existing single-cylinder testing.

[0004] The technical solution adopted in this utility model is:

[0005] In a first aspect, this utility model provides a pressure reduction pipeline for a fuel cell testing device, comprising:

[0006] Pipe connection plate, wherein the pipe connection plate has a rectangular structure;

[0007] A first air inlet pipe is provided on the pipeline connection plate, and a first diaphragm valve is provided on the first air inlet pipe. The first air inlet pipe is connected to a first hydrogen cylinder.

[0008] A second air inlet pipe is provided on the pipeline connection plate. A second diaphragm valve is provided on the second air inlet pipe. The second air inlet pipe is connected to a second hydrogen cylinder.

[0009] The first air guide tube has one end connected to the first diaphragm valve and the other end connected to a four-way connector.

[0010] The second air guide tube has one end connected to the second diaphragm valve and the other end connected to the four-way connector.

[0011] An air outlet pipe is located on the four-way connector.

[0012] Preferably, the first air inlet pipe is located at the lower left corner of the pipe connection plate, the second air inlet pipe is located at the lower right corner of the pipe connection plate, the first diaphragm valve and the second diaphragm valve are symmetrically arranged along the length of the pipe connection plate, a first pressure reducing valve is provided at the middle position of the first air guide pipe, and a second pressure reducing valve is provided at the middle position of the second air guide pipe.

[0013] Preferably, a first vent pipe is provided on the first diaphragm valve at a position opposite to the first air inlet pipe, and a second vent pipe is provided on the second diaphragm valve at a position opposite to the second air inlet pipe, and the first vent pipe and the second vent pipe are arranged symmetrically along the length of the pipeline connection plate.

[0014] Preferably, the first vent pipe is provided with a first vent valve at the end away from the first diaphragm valve, the second vent pipe is provided with a second vent valve at the end away from the second diaphragm valve, a first pressure sensor is provided on the first vent pipe between the first vent valve and the first diaphragm valve, and a second pressure sensor is provided on the second vent pipe at a position opposite to the first vent pipe.

[0015] Preferably, the first pressure reducing valve is provided with a first pressure adjusting knob, and the second pressure reducing valve is provided with a second pressure adjusting knob.

[0016] Preferably, the first pressure reducing valve is further provided with a first pressure gauge, and the second pressure reducing valve is further provided with a second pressure gauge.

[0017] Preferably, the four-way connector has a pressure relief valve at the end opposite to the air outlet pipe in the vertical direction.

[0018] Preferably, the end of the four-way connector opposite to the pressure relief valve is connected to one end of the third air guide pipe, the other end of the third air guide pipe is connected to the air outlet pipe, and the line connecting the first air guide pipe and the second air guide pipe is perpendicular to the line connecting the third air guide pipe and the pressure relief valve.

[0019] Preferably, the third air guide tube is further provided with a third pressure gauge, and the third air guide tube is connected to the air outlet tube through a compression fitting.

[0020] Secondly, this utility model provides a fuel cell testing device, including the pressure reducing pipeline for the fuel cell testing device described in the first aspect.

[0021] Beneficial Effects: This invention achieves a parallel gas supply architecture by placing a first hydrogen cylinder on the first inlet pipe and a second hydrogen cylinder on the second inlet pipe. A dual-channel confluence is achieved through symmetrically arranged first and second diaphragm valves and corresponding gas guide pipes on a rectangular pipe connection plate, in conjunction with a central four-way connector. The first and second pressure-reducing valves independently reduce the high-pressure gas in the first and second hydrogen cylinders, respectively. When the gas in one cylinder is depleted, the diaphragm valve can quickly switch cylinders to achieve continuous hydrogen supply, thus ensuring the stability and accuracy of the test. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0023] Figure 1 This is a front view of the pressure reduction pipeline used in the fuel cell testing device of this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the pressure reduction pipeline used in the fuel cell testing device of this utility model.

[0025] Parts and their numbers in the diagram:

[0026] Pipeline connection plate 1, first air inlet pipe 21, second air inlet pipe 22, first vent pipe 23, second vent pipe 24, first air guide pipe 25, second air guide pipe 26, third air guide pipe 27, air outlet pipe 28, compression fitting 281, first diaphragm valve 31, second diaphragm valve 32, first pressure reducing valve 41, first pressure gauge 411, first pressure adjusting knob 412, second pressure reducing valve 42, second pressure gauge 421, second pressure adjusting knob 422, four-way connector 5, third pressure gauge 6, pressure relief valve 7, first pressure sensor 81, second pressure sensor 82, first vent valve 91, first adjusting handle 911, second vent valve 92, second adjusting handle 921. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0028] Example 1

[0029] See Figures 1-2 This utility model provides a pressure reducing pipeline for a fuel cell testing device, comprising: a pipeline connecting plate 1, a first inlet pipe 21, a second inlet pipe 22, a first guide pipe 25, a second guide pipe 26, and an outlet pipe 28. The pipeline connecting plate 1 has a rectangular structure. The first inlet pipe 21 is disposed on the pipeline connecting plate 1 and is equipped with a first diaphragm valve 31. The first inlet pipe 21 is connected to a first hydrogen cylinder. The second inlet pipe 22 is disposed on the pipeline connecting plate 1 and is equipped with a second diaphragm valve 32. The second inlet pipe 22 is connected to a second hydrogen cylinder. The first guide pipe 25 is connected at one end to the first diaphragm valve 31 and at the other end to a four-way connector 5. The second guide pipe 26 is connected at one end to the second diaphragm valve 32 and at the other end to the four-way connector 5. The outlet pipe 28 is disposed on the four-way connector 5.

[0030] The first air inlet pipe 21 is located at the lower left corner of the pipe connection plate 1, the second air inlet pipe 22 is located at the lower right corner of the pipe connection plate 1, the first diaphragm valve 31 and the second diaphragm valve 32 are symmetrically arranged in the length direction of the pipe connection plate 1, the first air guide pipe 25 is provided with a first pressure reducing valve 41 in the middle position, and the second air guide pipe 26 is provided with a second pressure reducing valve 42 in the middle position.

[0031] In this embodiment, a first hydrogen cylinder is installed on the first inlet pipe 21, and a second hydrogen cylinder is installed on the second inlet pipe 22, realizing a parallel gas supply architecture with two cylinders. A first diaphragm valve 31, a second diaphragm valve 32, and corresponding gas guide pipes are symmetrically arranged on the rectangular pipe connection plate 1, and a central four-way connector 5 is used to achieve dual-channel convergence. The first pressure reducing valve 41 and the second pressure reducing valve 42 independently reduce the high-pressure gas in the first and second hydrogen cylinders, respectively. When the gas in one cylinder is depleted, the diaphragm valve can quickly switch cylinders to achieve continuous and uninterrupted hydrogen supply, thereby ensuring the stability and accuracy of the test.

[0032] A first vent pipe 23 is provided on the first diaphragm valve 31 at a position opposite to the first air inlet pipe 21, and a second vent pipe 24 is provided on the second diaphragm valve 32 at a position opposite to the second air inlet pipe 22. The first vent pipe 23 and the second vent pipe 24 are symmetrically arranged in the length direction of the pipeline connection plate 1.

[0033] The first vent pipe 23 is provided with a first vent valve 91 at the end away from the first diaphragm valve 31, and the second vent pipe 24 is provided with a second vent valve 92 at the end away from the second diaphragm valve 32. The first vent valve 91 and the second vent valve 92 are respectively provided with a first adjusting handle 911 and a second adjusting handle 921. A first pressure sensor 81 is provided on the first vent pipe 23 between the first vent valve 91 and the first diaphragm valve 31, and a second pressure sensor 82 is provided on the second vent pipe 24 at a position opposite to the first vent pipe 23. When a new hydrogen cylinder is connected to the inlet pipe, the impure hydrogen is discharged by briefly opening the vent valve, and then the corresponding vent valve is closed, thereby ensuring the purity of the hydrogen and obtaining accurate test data.

[0034] The first pressure reducing valve 41 is provided with a first pressure adjusting knob 412, and the second pressure reducing valve 42 is provided with a second pressure adjusting knob 422.

[0035] The first pressure reducing valve 41 is also equipped with a first pressure gauge 411, and the second pressure reducing valve 42 is also equipped with a second pressure gauge 421. The pressure gauges and adjustment knobs enable precise control of the intake pressure. The first pressure gauge 411 and the second pressure gauge 421 are used to display the hydrogen pressure value after pressure reduction by the pressure reducing valve when adjusting the pressure.

[0036] The four-way connector 5 has a pressure relief valve 7 at the end opposite to the air outlet pipe 28 in the vertical direction. The pressure relief valve 7 can release abnormal high pressure in time and improve system safety. The end of the four-way connector 5 opposite to the pressure relief valve 7 is connected to one end of the third air guide pipe 27. The other end of the third air guide pipe 27 is connected to the air outlet pipe 28. The line connecting the first air guide pipe 25 and the second air guide pipe 26 is perpendicular to the line connecting the third air guide pipe 27 and the pressure relief valve 7. The first air guide pipe 25 and the second air guide pipe 26 are connected to both sides of the four-way connector 5 in the horizontal direction. The third air guide pipe 27 and the pressure relief valve 7 are vertically distributed at the upper and lower ends of the four-way connector 5, forming a cross structure to optimize space utilization.

[0037] The third air guide tube 27 is also equipped with a third pressure gauge 6, which is used to monitor the final output pressure to ensure that it meets the test requirements. The third air guide tube 27 is connected to the air outlet tube 28 through a compression fitting 281. The pipeline connection plate 1 integrates all functional components, has a compact structure and symmetrical layout, which facilitates operation and maintenance. The standardized connection method of the compression fitting 281 and the four-way fitting 5 improves the reliability of the system.

[0038] In practice, the first diaphragm valve 31 is opened first, and high-pressure hydrogen enters the first pressure reducing valve 41 through the first gas guide pipe 25. After pressure reduction, it is delivered to the outlet pipe 28 through the four-way connector 5 to supply the test equipment. When the first pressure sensor 81 detects that the pressure of the first cylinder has dropped to the threshold, the first diaphragm valve 31 is closed and the second diaphragm valve 32 is opened. Hydrogen from the second cylinder is delivered to the outlet pipe 28 through the second gas guide pipe 26 and the second pressure reducing valve 42 after pressure reduction, achieving seamless switching.

[0039] Example 2

[0040] This embodiment provides a fuel cell testing device, which includes the pressure reducing pipeline for fuel cell testing as described in the first aspect. The pressure reducing pipeline in the fuel cell testing device reduces the high pressure of the gas source (the gas cylinder pressure is usually 15~30 MPa) to the safe low pressure required for the operation of the fuel cell, so as to avoid pressure fluctuations from impacting the internal reaction and materials such as the proton exchange membrane. The pressure-stabilized gas flow ensures the stability of the reactant stoichiometry.

[0041] The above description is merely a specific embodiment of this utility model. Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A pressure reducing line for a fuel cell testing apparatus, characterized by, include: Pipe connection plate (1), the pipe connection plate (1) is rectangular in shape; The first air inlet pipe (21) is provided on the pipeline connection plate (1), and the first air inlet pipe (21) is provided with a first diaphragm valve (31). The first air inlet pipe (21) is connected to the first hydrogen cylinder. The second air inlet pipe (22) is provided on the pipeline connection plate (1), and the second air inlet pipe (22) is provided with a second diaphragm valve (32). The second air inlet pipe (22) is connected to the second hydrogen cylinder. The first air guide tube (25) is connected at one end to the first diaphragm valve (31) and at the other end to a four-way connector (5). The second air guide tube (26) is connected at one end to the second diaphragm valve (32) and at the other end to the four-way connector (5); An air outlet pipe (28) is provided on the four-way connector (5).

2. The pressure reducing line for a fuel cell testing apparatus according to claim 1, wherein The first air inlet pipe (21) is located at the lower left corner of the pipe connection plate (1), the second air inlet pipe (22) is located at the lower right corner of the pipe connection plate (1), the first diaphragm valve (31) and the second diaphragm valve (32) are symmetrically arranged in the length direction of the pipe connection plate (1), the first air guide pipe (25) is provided with a first pressure reducing valve (41) at the middle position, and the second air guide pipe (26) is provided with a second pressure reducing valve (42) at the middle position.

3. The pressure reducing line for a fuel cell testing apparatus according to claim 2, wherein A first vent pipe (23) is provided on the first diaphragm valve (31) at a position opposite to the first air inlet pipe (21), and a second vent pipe (24) is provided on the second diaphragm valve (32) at a position opposite to the second air inlet pipe (22). The first vent pipe (23) and the second vent pipe (24) are arranged symmetrically in the length direction of the pipeline connection plate (1).

4. The pressure reducing line for a fuel cell testing apparatus according to claim 3, wherein The first vent pipe (23) is provided with a first vent valve (91) at the end away from the first diaphragm valve (31), and the second vent pipe (24) is provided with a second vent valve (92) at the end away from the second diaphragm valve (32). A first pressure sensor (81) is provided on the first vent pipe (23) between the first vent valve (91) and the first diaphragm valve (31), and a second pressure sensor (82) is provided on the second vent pipe (24) at a position opposite to the first vent pipe (23).

5. The pressure reducing line for a fuel cell testing apparatus according to claim 2, wherein The first pressure reducing valve (41) is provided with a first pressure adjusting knob (412), and the second pressure reducing valve (42) is provided with a second pressure adjusting knob (422).

6. The pressure reducing line for a fuel cell testing apparatus according to claim 5, wherein The first pressure reducing valve (41) is also equipped with a first pressure gauge (411), and the second pressure reducing valve (42) is also equipped with a second pressure gauge (421).

7. The pressure reducing line for a fuel cell testing apparatus according to claim 2, wherein The four-way connector (5) has a pressure relief valve (7) at the end opposite to the air outlet pipe (28) in the vertical direction.

8. The pressure reducing line for a fuel cell testing apparatus according to claim 7, wherein One end of the four-way connector (5) opposite to the pressure relief valve (7) is connected to one end of the third air guide pipe (27), and the other end of the third air guide pipe (27) is connected to the air outlet pipe (28). The line connecting the first air guide pipe (25) and the second air guide pipe (26) is perpendicular to the line connecting the third air guide pipe (27) and the pressure relief valve (7).

9. The pressure reducing line for a fuel cell testing apparatus according to claim 8, wherein The third air guide pipe (27) is also equipped with a third pressure gauge (6), and the third air guide pipe (27) is connected to the air outlet pipe (28) through a compression fitting (281).

10. A fuel cell testing apparatus characterized by comprising: Includes a pressure-reducing line for a fuel cell testing apparatus as claimed in any one of claims 1 to 9.

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