Hydrogen emptying pipe structure of fuel cell test laboratory
By separating the hydrogen exhaust pipe structures of high-power and low-power stack test benches in the fuel cell test laboratory, the risks of hydrogen leakage and back pressure are solved, the technical effects of safety and economy are achieved, the problem of high equipment installation costs in the existing technology is solved, and safety and economy are improved.
Patent Information
- Application Number
- CN202423046182.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In fuel cell testing laboratories, the existing technology uses shared hydrogen exhaust pipes for high-power and low-power stack test benches, which leads to hydrogen leakage and back pressure risks, affecting the accuracy and safety of test data, while also increasing equipment installation costs.
A hydrogen exhaust pipe structure is adopted to separate high-power and low-power fuel cell test benches. Condensed water is automatically collected through inclined exhaust pipes and collecting pipes. One-way valves are set within the same power level range to reduce the number of flame arresters and lower equipment installation costs.
It effectively prevents hydrogen leakage and reverse flow problems in the small-power fuel cell test bench when the high-power fuel cell test bench is running, reduces equipment installation costs, and improves test safety and data accuracy.
Smart Images
Figure CN223375583U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydrogen exhaustion, in particular to a hydrogen exhaust pipe structure for a fuel cell test laboratory. Background Art
[0002] Fuel cells are highly efficient and clean energy conversion devices that convert chemical energy stored in fuel directly into electrical energy. Currently, fuel cell technology is widely used in a variety of fields, including but not limited to transportation, stationary power supplies, and portable power sources. With continuous technological advancements, the performance and safety of fuel cells have been significantly improved, especially in the utilization of hydrogen energy.
[0003] As one of the primary energy sources for fuel cells, hydrogen offers advantages such as high energy density and a pollution-free product. However, due to its small molecular weight, hydrogen also presents safety risks such as leakage, flammability, and explosion. Hydrogen has a very low lower explosion limit, and leaks can easily lead to fires or explosions. Therefore, ensuring the safe management and use of hydrogen is crucial. In fuel cell testing laboratories, in addition to the hydrogen supply stage, the exhaust of hydrogen and air has always been a crucial step in ensuring hydrogen safety during testing. However, in current hydrogen fuel cell testing laboratories, most test benches currently use multiple devices to discharge hydrogen and air. In this solution, if a 150KW fuel cell test bench and a 500W fuel cell test bench share the same hydrogen exhaust pipeline, when the 150KW fuel cell test bench is working, the hydrogen of the 500W fuel cell test bench may not be discharged normally due to pressure resistance. In addition, when the high-power fuel cell test bench discharges a large amount of gas, when the 500W fuel cell test bench is working, gas back pressure will occur and flow back to the 500W fuel cell, causing the fuel cell to carry voltage, which greatly affects the accuracy of the test data and the safety of the test process.
[0004] Currently, most hydrogen fuel cell laboratories use a method whereby each device has its own separate hydrogen and air exhaust pipes. This method ensures that each device can be emptied smoothly without the risk of back pressure, but the exhaust cost is very high. A flame arrester needs to be added to the end of each hydrogen exhaust pipe, which greatly increases the equipment installation cost. Utility Model Content
[0005] The technical problem to be solved by the utility model is how to reduce the equipment installation cost.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:
[0007] A fuel cell test laboratory hydrogen exhaust pipe structure, comprising a first exhaust pipe structure and a second exhaust pipe structure;
[0008] The first exhaust pipe structure includes a first exhaust main pipe, an exhaust pipe, a collecting pipe and a first flame arrester. Multiple groups of exhaust pipes are connected to the collecting pipe. The output end of the collecting pipe is connected to the first exhaust main pipe. The height of the output end of each group of exhaust pipes is lower than the height of the input end. The height of the output end of the collecting pipe is lower than the height of the input end. The output end of the first exhaust main pipe is provided with a first flame arrester.
[0009] The second exhaust pipe structure includes a second exhaust main pipe and a second flame arrester, and the output end of the second exhaust main pipe is provided with the second flame arrester.
[0010] The hydrogen-air drain pipes of the high-power fuel cell test bench and the low-power fuel cell test bench are separated, which effectively prevents the problem of poor or even impossible draining of the low-power fuel cell test bench when the high-power fuel cell test bench is running; compared with emptying each device separately, multiple groups of drain pipes are connected to the first drain main pipe through a collecting pipe, which greatly reduces the number of flame arresters that need to be installed and effectively reduces the cost of equipment installation and use; and through the inclined setting of the drain pipe and the collecting pipe, the condensed water is automatically gathered and discharged into the first drain main pipe for collection, preventing the condensed water from flowing back.
[0011] Preferably, the output end of the first exhaust main pipe is further provided with a first rainproof cap.
[0012] Preferably, each set of drain pipes is provided with a drain ball valve.
[0013] Preferably, each set of emptying pipes is provided with a one-way valve.
[0014] Preferably, a first drain valve is provided at the bottom of the first drain main pipe.
[0015] Preferably, a first liquid level gauge is provided at the bottom of the first emptying main pipe.
[0016] Preferably, the output end of the second drain main pipe is further provided with a second rainproof cap.
[0017] Preferably, a second drain valve is provided at the bottom of the second drain main pipe.
[0018] Preferably, a second liquid level gauge is provided at the bottom of the second emptying main pipe.
[0019] Compared with the prior art, the beneficial effects of the present invention are:
[0020] 1. The hydrogen-air exhaust pipes of the high-power fuel cell test bench and the low-power fuel cell test bench are separated, which effectively prevents the problem of poor or even impossible exhaustion of the low-power fuel cell test bench when the high-power fuel cell test bench is running; and compared with the separate exhaust of each device, multiple groups of exhaust pipes are connected to the first exhaust main pipe through a collecting pipe, which greatly reduces the number of flame arresters that need to be installed and effectively reduces the cost of equipment installation and use.
[0021] 2. By setting the emptying pipe and the collecting pipe in an inclined manner, the condensed water is automatically collected and discharged into the first emptying main pipe for collection, preventing the condensed water from flowing back.
[0022] 3. The separation of the hydrogen-air exhaust pipes of the high-power fuel cell test bench and the low-power fuel cell test bench effectively prevents the problem of hydrogen leakage or abnormal charging of the fuel cell under test due to the failure to close the exhaust ball valve when the high-power fuel cell test bench is working.
[0023] 4. A one-way valve is installed on the exhaust pipe within the same power level range. Even in the case of misoperation, when only one device is running and the exhaust ball valves of other devices are forgotten to be closed, hydrogen will not flow back to other devices. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION
[0025] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described in conjunction with the accompanying drawings.
[0026] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0027] In this application, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise expressly specified or limited.
[0028] See Figure 1 This embodiment discloses a hydrogen exhaust pipe structure for a fuel cell test laboratory, including a first exhaust pipe structure 1 and a second exhaust pipe structure 2. The first exhaust pipe structure 1 and the second exhaust pipe structure 2 are independently arranged. The first exhaust pipe structure 1 is used for hydrogen exhaust from a small-power short stack test bench, and the second exhaust pipe structure 2 is used for hydrogen exhaust from a large-power fuel cell test bench.
[0029] The first emptying pipe structure 1 includes a first emptying main pipe 11, an emptying pipe 12, a collecting pipe 13, a first flame arrester 14, and a first rain cap 15. Multiple groups of emptying pipes 12 are connected to the collecting pipe 13, and the output end of the collecting pipe 13 is connected to the first emptying main pipe 11. Each group of emptying pipes 12 is tilted so that the height of the output end of the emptying pipe 12 is lower than the height of the input end. Similarly, the collecting pipe 13 is also tilted so that the height of the output end of the collecting pipe 13 is lower than the height of the input end. Since a certain amount of condensed water will be generated during hydrogen discharge, the tilted setting of the emptying pipe 12 and the collecting pipe 13 automatically gathers and discharges into the first emptying main pipe 11 for collection, thereby preventing the condensed water from flowing back.
[0030] A first flame arrester 14 is provided at the output end of the first drain main pipe 11 , and a first rainproof cap 15 is provided on the first drain main pipe 11 on top of the first flame arrester 14 to prevent rainwater from entering the first drain main pipe 11 .
[0031] Furthermore, a first drain valve 111 and a first liquid level gauge 112 are provided at the bottom of the first drain main pipe 11. The first liquid level gauge 112 can monitor the liquid level in the first drain main pipe 11 in real time. When the liquid level is too high, the first drain valve 111 is opened to drain the accumulated water in the first drain main pipe 11.
[0032] Furthermore, each set of exhaust pipes 12 is provided with an exhaust ball valve 121 and a one-way valve 122. In the design of hydrogen-air exhaust pipes within the same power level range, through the setting of the one-way valve 122, even in the case of misoperation, when only a single device is running and the exhaust ball valve 121 of other devices is forgotten to be closed, hydrogen will not flow back to other devices.
[0033] The second drain pipe structure 2 includes a second drain main pipe 21, a second flame arrester 22 and a second rain cap 23. The output end of the second drain main pipe 21 is provided with a second flame arrester 22, and a second rain cap 23 is also provided on the second drain main pipe 21 on top of the second flame arrester 22 to prevent rainwater from entering the second drain main pipe 21.
[0034] Furthermore, a second drain valve 211 and a second liquid level gauge 212 are provided at the bottom of the second drain main pipe 21. The second liquid level gauge 212 can monitor the liquid level in the second drain main pipe 21 in real time. When the liquid level is too high, the second drain valve 211 is opened to drain the accumulated water in the second drain main pipe 21.
[0035] The working process of this embodiment is as follows: the first exhaust pipe structure 1 is used for hydrogen discharge from a small-power short-stack test bench, and the second exhaust pipe structure 2 is used for hydrogen discharge from a large-power stack test bench.
[0036] The small-power fuel cell test bench adopts a combined emptying method with the same power range. Taking the 10KW and 500W short stack test benches as an example, when the 10KW equipment starts to run, the emptying ball valve 121 and the one-way valve 122 are opened, and the hydrogen enters the first emptying main pipe 11 through the emptying pipe 12 and the collecting pipe 13, and then passes through the first flame arrester 14 in the first emptying main pipe and is discharged into the atmosphere. The condensed water generated during the hydrogen discharge is automatically collected by the emptying pipe 12 and the collecting pipe 13 and discharged into the first emptying main pipe 11 for collection. When the first liquid level gauge 112 monitors that the liquid level in the first emptying main pipe 11 is too high, the first drain valve 111 is opened to drain the accumulated water in the first emptying main pipe 11; similarly, after the 500W fuel cell test bench is turned on, hydrogen is discharged into the atmosphere in the same way.
[0037] Taking the 300KW high-power fuel cell test bench as an example, the high-power test bench uses a separate pipeline for emptying. Hydrogen is directly discharged from the second emptying main pipe 21, and is directly discharged into the atmosphere after passing through the second flame arrester 22. The condensed water generated during the hydrogen discharge automatically gathers at the bottom of the second emptying main pipe 21 by gravity and is collected. When the second liquid level gauge 212 monitors that the liquid level in the second emptying main pipe 21 is too high, the second drain valve 211 is opened to drain the accumulated water in the second emptying main pipe 21.
[0038] In this embodiment:
[0039] 1. Separating the hydrogen-air exhaust pipes of the high-power fuel cell test bench and the low-power fuel cell test bench effectively prevents the problem of poor or even impossible exhaustion of the low-power fuel cell test bench when the high-power fuel cell test bench is running.
[0040] 2. The separation of the hydrogen-air exhaust pipes of the high-power fuel cell test bench and the low-power fuel cell test bench effectively prevents the problem of hydrogen leakage or abnormal charging of the fuel cell under test due to the failure to close the exhaust ball valve 121 when the high-power fuel cell test bench is working.
[0041] 3. A one-way valve 122 is provided on the exhaust pipe 12 within the same power level range. Even in the case of misoperation, when only one device is running and the exhaust ball valve 121 of other devices is forgotten to be closed, hydrogen will not flow back to other devices.
[0042] 4. By setting the emptying pipe and the collecting pipe in an inclined manner, the condensed water is automatically collected and discharged into the first emptying main pipe for collection, preventing the condensed water from flowing back.
[0043] 5. Compared with emptying each device separately, in this embodiment, multiple groups of emptying pipes 12 are connected to the first emptying main pipe 11 through the collecting pipe 13, which greatly reduces the number of flame arresters required to be installed and effectively reduces the cost of equipment installation and use.
[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.
[0045] The above-mentioned embodiments only represent the implementation methods of the utility model. The protection scope of the utility model is not limited to the above-mentioned embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, which all fall within the protection scope of the utility model.
Claims
1. A hydrogen exhaust pipe structure for a fuel cell test laboratory, characterized by: including a first exhaust pipe structure and a second exhaust pipe structure; The first exhaust pipe structure includes a first exhaust main pipe, an exhaust pipe, a collecting pipe and a first flame arrester. Multiple groups of exhaust pipes are connected to the collecting pipe. The output end of the collecting pipe is connected to the first exhaust main pipe. The height of the output end of each group of exhaust pipes is lower than the height of the input end. The height of the output end of the collecting pipe is lower than the height of the input end. The output end of the first exhaust main pipe is provided with a first flame arrester. The second exhaust pipe structure includes a second exhaust main pipe and a second flame arrester, and the output end of the second exhaust main pipe is provided with the second flame arrester.
2. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: The output end of the first exhaust main pipe is further provided with a first rainproof cap.
3. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: Each set of drain pipes is equipped with a drain ball valve.
4. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: Each set of exhaust pipes is provided with a one-way valve.
5. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: A first drain valve is provided at the bottom of the first drain main pipe.
6. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: A first liquid level gauge is provided at the bottom of the first emptying main pipeline.
7. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: The output end of the second drain main pipe is further provided with a second rainproof cap.
8. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: A second drain valve is provided at the bottom of the second drain main pipe.
9. The hydrogen exhaust pipe structure for a fuel cell testing laboratory according to claim 1, characterized in that: A second liquid level gauge is provided at the bottom of the second emptying main pipe.