Hydrogen using process detection assembly device for fuel cell engine

Abstract

The utility model discloses a hydrogen process detection assembly device for a fuel cell engine. The hydrogen process detection assembly device comprises a hydrogen process flow collection pipeline and a hydrogen purity detection branch which are integrated in a tool frame, one end of the hydrogen process flow collecting pipeline is connected with a hydrogen supply pipe inlet, the other end is connected with a hydrogen supply pipe outlet, and a sampling gas inlet connector is formed in the middle of the hydrogen process flow collecting pipeline; one end of the hydrogen purity detection branch is connected with the sampling gas inlet interface, and the other end is connected to the sampling gas outlet. According to the test device assembly, integration of a hydrogen purity detection function and a hydrogen flow process acquisition and analysis function is realized, an online gas flow detection method is provided for a hydrogen test for a fuel cell engine, and a convenient and effective online detection measure is also provided for safety management of a hydrogen medium for the fuel cell engine; the two devices are compatible and used independently, operation is easy, all devices installed in the device meet national standard anti-explosion test requirements, and the device is efficient and safe.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen gas detection, in particular to a hydrogen process detection assembly device for a fuel cell engine. Background Art

[0002] During routine hydrogen use, low hydrogen purity within the hydrogen supply pipeline inevitably results in the hydrogen purity within the pipeline failing to meet test requirements (test gas purity ≥99.99%), hindering fuel cell output efficiency testing. This is primarily due to two factors: 1) Contamination with other hazardous chemical impurities poses additional safety risks. For example, trace amounts of impurities such as sulfides and carbon monoxide can poison fuel cell catalysts, causing irreversible degradation and significantly reducing fuel cell performance. 2) Failure to thoroughly purge hydrogen pipelines before use can lead to the infiltration of common impurities such as air and nitrogen. This influx of impurities, especially air, can inevitably cause changes in the hydrogen concentration within the pipeline. Hydrogen has a low lower explosion limit. According to theoretical calculations, the maximum concentration at which hydrogen ignites in air is between 4.0% and 75.6% by volume. Leakage or exposure to open flames can easily cause explosions or fires. Therefore, it is crucial to ensure the safety of gas purity and storage in the hydrogen supply pipeline.

[0003] In fuel cell testing, in addition to the need to monitor the hydrogen purity at the source end of the hydrogen pipe as mentioned above, the collection and analysis of the hydrogen process flow in the pipeline is also an important part of hydrogen testing during the fuel cell testing process.

[0004] The purpose of hydrogen purity value detection is to ensure that the gas medium used during fuel cell testing meets the quality requirements of the test hydrogen and that hydrogen in the pipeline is safe. The purpose of hydrogen process flow acquisition and analysis is to ensure fuel cell performance testing research. The acquisition of hydrogen flow parameters in the pipeline can realize real-time monitoring of the instantaneous consumption value, cumulative consumption value, gas flow rate value, and gas temperature value of the gas flow in the gas supply pipeline. The specific uses or purposes are as follows: 1) The acquisition of instantaneous flow consumption can accurately evaluate and calculate the hydrogen consumption rate of the fuel cell, thereby making an accurate calculation of the fuel cell conversion efficiency; 2) The acquisition of the cumulative consumption of hydrogen by the flow meter can synchronously calculate the hydrogen consumption time and provide a prediction of the hydrogen supply for fuel cell testing to avoid the depletion of hydrogen during use and the inability to replenish it in time, affecting the test progress; 3) The flow meter has the ability to monitor the safe flow rate of the test hydrogen in the pipeline to avoid danger. The design flow rate of flammable gas in industrial pipelines is ≯25m / s. 4) The gas temperature value assists in monitoring the safety management of hydrogen use.

[0005] If users conduct fuel cell engine tests without a viable detection device while the engine is running, they will not be able to monitor the hydrogen status at the hydrogen source during the test. This also makes it impossible to assess the safety of the test process and the accuracy of the fuel cell test data.

[0006] Currently, hydrogen fuel cells lack a purity detection device for the hydrogen gas source. Operators can only perform the following operations before testing: 1) repeatedly replace the hydrogen pipeline with nitrogen to expel any remaining air; 2) repeatedly replace the hydrogen pipeline with hydrogen again to expel any remaining nitrogen. This method increases the number of hydrogen replacements when the hydrogen pipeline is constructed over a long distance. This method inevitably results in repeated purging of hydrogen at the user end, resulting in high pre-test evacuation costs. Furthermore, during engine testing, the lack of a flow meter prevents real-time monitoring of parameters such as the total hydrogen consumption in the pipeline, requiring the user to set up an external hydrogen data acquisition system. This makes the entire hydrogen use process extremely inconvenient, time-consuming, and labor-intensive.

[0007] In view of the shortcomings of existing treatment methods, it is particularly important to develop new hydrogen process detection design solutions. Utility Model Content

[0008] The technical problem to be solved by the present invention is how to solve the problem of difficulty in detecting the hydrogen purity value and collecting and analyzing the flow value when testing the hydrogen source end of the existing fuel cell.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] A hydrogen process detection assembly device for a fuel cell engine includes a hydrogen process flow collection pipeline and a hydrogen purity detection branch integrated in a tooling frame;

[0011] One end of the hydrogen process flow collection pipeline is connected to the inlet of the hydrogen supply pipe, and the other end is connected to the outlet of the hydrogen supply pipe. A sampling air inlet interface is provided at the middle position of the hydrogen process flow collection pipeline. A hydrogen source end air inlet pressure relief valve is also provided at the inlet and outlet of the hydrogen supply pipe of the hydrogen process flow collection pipeline, and the hydrogen source end air inlet pressure relief valve is connected to the pressure relief port of the hydrogen supply pipe.

[0012] One end of the hydrogen purity detection branch is connected to the sampling air inlet interface, and the other end is connected to the sampling air outlet.

[0013] The test device assembly of the present application is connected by designing a hydrogen process flow collection pipeline and a hydrogen purity detection branch, thereby realizing the integration of the hydrogen purity detection function and the hydrogen flow process collection and analysis function, providing an online gas flow detection method for hydrogen testing for fuel cell engines, and also providing a convenient and effective online detection measure for the safe management of hydrogen media for fuel cell engines. The two are compatible with each other and can be used independently, and are easy to operate. The devices installed inside the device meet the national standard explosion-proof test requirements and are efficient and safe.

[0014] As a further solution of the present invention: a hydrogen pipe inlet stop valve and a mass flow meter are arranged on the hydrogen process flow collection pipeline and between the hydrogen source end inlet pressure relief valve and the hydrogen supply pipe outlet.

[0015] As a further solution of the present invention: the hydrogen pipe air inlet stop valve and the mass flow meter are both communicatively connected to the terminal.

[0016] As a further solution of the present invention: the sampling air inlet interface is opened between the mass flow meter and the outlet of the hydrogen supply pipe.

[0017] As a further solution of the present invention: a pressure reducing valve, a needle valve, a one-way valve, a filter and a hydrogen explosion-proof purity detector are sequentially provided on the hydrogen purity detection branch between the sampling air inlet interface and the sampling exhaust port.

[0018] As a further solution of the present invention: a float flowmeter is further provided between the hydrogen explosion-proof purity detector and the sampling exhaust port.

[0019] As a further solution of the present invention: the pressure reducing valve, needle valve, one-way valve, filter, hydrogen explosion-proof purity detector and float flowmeter are all communicatively connected to the terminal.

[0020] As a further solution of the present invention: the hydrogen supply pipe outlet of the hydrogen process flow collection pipeline is connected to the fuel cell engine.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] First, the test device assembly of the present application is designed to connect the hydrogen process flow collection pipeline and the hydrogen purity detection branch, thereby realizing the integration of the hydrogen purity detection function and the hydrogen flow process collection and analysis function. This provides an online gas flow detection method for hydrogen testing of fuel cell engines, and also provides a convenient and effective online detection measure for the safe management of hydrogen medium used in fuel cell engines. The two are compatible with each other and can be used independently, which is easy to operate. The components installed in the device all meet the national standard explosion-proof test requirements, and are efficient and safe.

[0023] Secondly, the present application designs a hydrogen source-end inlet pressure relief valve on the hydrogen process flow collection pipeline. Even if the external hydrogen supply pressure is high or other users mistakenly operate and forget to close the device manual valve, high-pressure hydrogen will not leak into the equipment and cause damage to the device components, providing a safety failure protection measure;

[0024] Finally, the test device assembly of the present application can be independently connected to the fuel cell engine on-site and used fixedly. The data collected by the test device supports remote online transmission to the terminal host computer for display, storage or processing, which greatly improves the test efficiency. At the same time, it also reduces the work of testers in setting up the hydrogen test platform and effectively reduces the test cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the design of a hydrogen process detection assembly device for a fuel cell engine according to an embodiment of the present utility model;

[0026] Description of reference numerals:

[0027] 1. Hydrogen source inlet pressure relief valve; 2. Hydrogen pipe inlet stop valve; 3. Mass flow meter; 4. Pressure reducing valve; 5. Needle valve; 6. Check valve; 7. Hydrogen explosion-proof purity tester; 8. Filter; 9. Float flowmeter; 10. Hydrogen process detection assembly device. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0029] Reference Figure 1 A hydrogen process detection assembly device for a fuel cell engine. The hydrogen process detection assembly device 10 includes a hydrogen process flow collection pipeline and a hydrogen purity detection branch integrated in a tooling frame. The device can be placed on-site near the fuel cell engine under test for fixed use.

[0030] One end of the hydrogen process flow collection pipeline is connected to the inlet of the hydrogen supply pipe, and the other end is connected to the outlet of the hydrogen supply pipe. The outlet of the hydrogen supply pipe is connected to the fuel cell engine. A sampling air inlet interface is opened at the middle position of the hydrogen process flow collection pipeline. A hydrogen source end air inlet pressure relief valve 1 is also set at the inlet and outlet of the hydrogen supply pipe of the hydrogen process flow collection pipeline, and the hydrogen source end air inlet pressure relief valve 1 is connected to the pressure relief port of the hydrogen supply pipe.

[0031] Furthermore, a hydrogen pipe inlet stop valve 2 and a mass flow meter 3 are provided on the hydrogen process flow collection pipeline and between the hydrogen source end inlet pressure relief valve 1 and the hydrogen supply pipe outlet, and the hydrogen pipe inlet stop valve 2 and the mass flow meter 3 are both communicatively connected to the terminal host computer, and the operation of the hydrogen pipe inlet stop valve 2 and the mass flow meter 3 is controlled by the terminal host computer, and the data detected by the mass flow meter 3 can be sent to the terminal host computer for the next step of storage or analysis.

[0032] It should be noted that:

[0033] The model of mass flow meter 3 is FM01;

[0034] The model of hydrogen pipe inlet shut-off valve 2 is HV01;

[0035] The model of the hydrogen source end inlet pressure relief valve 1 is SV01.

[0036] Specifically, the hydrogen process flow collection and analysis part is realized by online detection readings of the mass flow meter 3 installed on the hydrogen supply main pipeline in the device (i.e., the hydrogen process flow collection pipeline) and remote 485 communication transmission. The mass flow meter 3 is independently installed on the hydrogen supply main pipeline in the device, and does not affect the hydrogen detection in the hydrogen purity detection branch, and is independently detected.

[0037] External hydrogen is also introduced into the hydrogen supply main pipeline in the device through the hydrogen supply pipe inlet. The hydrogen pipe inlet stop valve 2 on the hydrogen supply main pipeline is opened. The hydrogen supply gas directly passes through the mass flow meter 3 to collect gas flow signals, temperature signals, etc. in real time for online analysis, and finally transmits the data to the terminal host computer; the hydrogen in the hydrogen supply main pipeline in the device will be directly connected in series with the fuel cell engine of the test device through the hydrogen supply pipe outlet to achieve the final hydrogen test;

[0038] The function of the hydrogen source end air inlet pressure relief valve 1 is to provide hardware safety protection for the entire test device assembly; in order to prevent the introduction of high-pressure hydrogen from damaging the flow meter in the device and other system-configured hardware.

[0039] Reference Figure 1 One end of the hydrogen purity detection branch is connected to the sampling air inlet interface, and the other end is connected to the sampling exhaust port, wherein the sampling air inlet interface is opened between the mass flow meter 3 and the hydrogen supply pipe outlet;

[0040] Furthermore, a pressure reducing valve 4, a needle valve 5, a one-way valve 6, a filter 8, a hydrogen explosion-proof purity detector 7 and a float flowmeter 9 are sequentially provided on the hydrogen purity detection branch between the sampling air inlet interface and the sampling exhaust port. It should be noted that the pressure reducing valve 4, the needle valve 5, the one-way valve 6, the filter 8, the hydrogen explosion-proof purity detector 7 and the float flowmeter 9 are all communicatively connected to the terminal host computer.

[0041] Specifically, the hydrogen purity detection part is implemented by online sampling and monitoring using a gas concentration transmitter. When the hydrogen process detection assembly device 10 starts running, hydrogen enters the device through the hydrogen supply pipe inlet, flows through the hydrogen pipe inlet stop valve 2 and the mass flowmeter 3, and enters the sampling branch (i.e., the hydrogen purity detection branch) from the sampling inlet interface. Subsequently, the pressure reducing valve 4 reduces the pressure of the sampled gas until it reaches the rated working pressure. The needle valve 5 and the one-way valve 6 are opened simultaneously. The sampled gas is then dried and filtered by the filter 8 and finally passed into the hydrogen explosion-proof purity detector 7 for online analysis and processing. The hydrogen explosion-proof purity detector 7 supports remote transmission and local section code display. After the sampling and analysis is completed, the gas is freely discharged into the atmosphere from the rear sampling exhaust port.

[0042] The float flowmeter 9 provided at the rear end of the branch is used to monitor the flow of the entire sampling branch to prevent the inability to accurately read the hydrogen purity value in real time due to blockage of the sampling branch.

[0043] It should be noted that:

[0044] The model of pressure reducing valve 4 is PRV01;

[0045] The model of needle valve 5 is MV01;

[0046] The model of the one-way valve 6 is CV01;

[0047] The model of hydrogen explosion-proof purity tester 7 is HT01;

[0048] Select FT01 as the model of filter 8;

[0049] The model of the float flowmeter 9 is FM02.

[0050] The specific operating principles of this application are as follows:

[0051] This application effectively combines two hydrogen function detection methods, that is, hydrogen purity detection is completed by designing a sampling branch on the hydrogen supply main pipeline to share the same pipeline with the fuel cell engine hydrogen supply circuit, and at the same time, a hydrogen explosion-proof purity detector 7 and other system accessories are set to complete the online detection of pure hydrogen gas. On the other hand, the hydrogen mass flowmeter 3 is synchronously connected in series to the hydrogen supply main pipeline in the device and connected to the fuel cell engine of the test piece, and the technical indicators of the fuel cell of the test piece are collected and analyzed online, such as hydrogen instantaneous flow rate, cumulative flow rate, gas flow rate, gas temperature, etc., and used as a basis for the fuel cell efficiency conversion calculation.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hydrogen process detection assembly device for a fuel cell engine, characterized in that: It includes a hydrogen process flow collection pipeline and a hydrogen purity detection branch integrated in a tooling frame; One end of the hydrogen process flow collection pipeline is connected to the inlet of the hydrogen supply pipe, and the other end is connected to the outlet of the hydrogen supply pipe. A sampling air inlet interface is provided at the middle position of the hydrogen process flow collection pipeline. A hydrogen source end air inlet pressure relief valve (1) is also provided at the inlet and outlet of the hydrogen supply pipe of the hydrogen process flow collection pipeline, and the hydrogen source end air inlet pressure relief valve (1) is connected to the pressure relief port of the hydrogen supply pipe. One end of the hydrogen purity detection branch is connected to the sampling air inlet interface, and the other end is connected to the sampling air outlet.

2. A fuel cell engine hydrogen process detection assembly device according to claim 1, characterized in that: A hydrogen pipe inlet stop valve (2) and a mass flow meter (3) are provided on the hydrogen process flow collection pipeline and located between the hydrogen source end inlet pressure relief valve (1) and the hydrogen supply pipe outlet.

3. A fuel cell engine hydrogen process detection assembly device according to claim 2, characterized in that: The hydrogen pipe gas inlet stop valve (2) and the mass flow meter (3) are both communicatively connected to the terminal.

4. A fuel cell engine hydrogen process detection assembly device according to claim 2, characterized in that: The sampling air inlet interface is provided between the mass flow meter (3) and the outlet of the hydrogen supply pipe.

5. The hydrogen process detection assembly device for a fuel cell engine according to claim 1, characterized in that: A pressure reducing valve (4), a needle valve (5), a one-way valve (6), a filter (8) and a hydrogen explosion-proof purity detector (7) are sequentially provided on a hydrogen purity detection branch between the sampling air inlet interface and the sampling air outlet.

6. A fuel cell engine hydrogen process detection assembly device according to claim 5, characterized in that: A float flowmeter (9) is also provided between the hydrogen explosion-proof purity detector (7) and the sampling exhaust port.

7. A fuel cell engine hydrogen process detection assembly device according to claim 6, characterized in that: The pressure reducing valve (4), needle valve (5), one-way valve (6), filter (8), hydrogen explosion-proof purity detector (7) and float flowmeter (9) are all communicatively connected to the terminal.

8. The hydrogen process detection assembly device for a fuel cell engine according to claim 1, characterized in that: The hydrogen supply pipe outlet of the hydrogen process flow collection pipeline is connected to the fuel cell engine.

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