High-pressure hydrogen sampling device

Abstract

The utility model discloses a high-pressure hydrogen sampling device, which can be used for connecting a hydrogenation gun, a hydrogen storage tank or a transportation tank car of a hydrogen refueling station, and at least comprises a high-pressure pipeline, a sampling pipeline and a control system, each branch pipeline is provided with a first sampling inlet, a second sampling inlet, a third sampling inlet and a high-pressure ball valve and a one-way valve of the corresponding branch pipeline; pressure reducing valves are arranged at the tail ends of the high-pressure pipelines The low-pressure pipeline is connected with the pressure reducing valve, a three-way valve is arranged at the tail end of the pipeline, and the three-way valve is used for selectively communicating the emptying assembly and the sampling steel cylinder; and the low-pressure pipeline is provided with a vacuum unit for carrying out vacuum purification treatment on the sampling channel before sampling. According to the utility model, different sampling inlets can be respectively matched with a hydrogenation gun, a storage tank or a transportation tank car of a hydrogen refueling station, so that the sampling adaptability is higher; by using the vacuum unit and the heating unit before sampling, high-temperature and high-vacuum purification treatment in a sampling channel can be realized, and the sampling accuracy is ensured; the sampling device is arranged in the luggage case, so that the use portability of the device can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sampling, in particular to a high-purity and high-pressure hydrogen sampling device which can be connected to a hydrogenation station, a storage tank or a tank truck. Background Art

[0002] With the rapid development of hydrogen energy technology in recent years, the quality of hydrogen has a significant impact on the performance and life of fuel cell engines. During the daily use of hydrogen, hydrogen must be sampled and tested to ensure that the fuel hydrogen used meets the use standards of fuel cell engines. Therefore, during the hydrogen sampling process, it is necessary to ensure that the sampling can be carried out at a pressure of up to 70MPa and the hydrogen sampled is not contaminated in order to obtain accurate test results.

[0003] Chinese patent CN219038532U discloses a high-pressure hydrogen sampling device for a hydrogen refueling station, comprising a hydrogenation port, a venting quick connector, a nitrogen protection quick connector, a high-pressure pressure regulating valve, a proportional unloading valve, and a series of ball valves. The hydrogenation port is tightly connected to the hydrogenation gun and is respectively connected to the left and right trunnion ball valves. The left trunnion ball valve is a sampling switch valve, and the right trunnion ball valve is a purge switch valve. The upper left of the trunnion ball valve is connected to a high-pressure pressure regulating valve, and the high-pressure pressure regulating valve is respectively connected to a proportional unloading valve and a series of ball valves. The proportional unloading valve is connected to a nitrogen protection quick connector. One of the paths of the series of ball valves is connected to a sulfur-passivated coated cylinder, and the other paths are connected to an 8L sampling bottle through a cylinder connector. The right trunnion ball valve is connected to a venting quick connector through a filter, and the venting quick connector is connected to the vent port of the hydrogenator. This solution can effectively carry out high-pressure hydrogen sampling, meet the sample volume required for hydrogen testing, and avoid sampling being limited due to high-pressure safety factors, resulting in a lack of hydrogen quality monitoring.

[0004] Although this type of solution can ensure that sampling can obtain the required sample volume, the accuracy of sampling and its adaptability and portability in different scenarios still need to be improved.

[0005] Therefore, there is an urgent need for a high-purity, high-pressure hydrogen sampling device that can not only ensure the accuracy of sampling, but also be suitable for high-pressure hydrogen sampling in different hydrogen storage equipment such as hydrogen refueling stations, storage tanks or tank trucks, and is more portable.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0007] The purpose of the utility model is to provide a high-pressure hydrogen sampling device, which can be adapted to the hydrogenation gun, storage tank or transport tank truck of the hydrogenation station through different sampling inlets, and has stronger sampling adaptability; through the use of a vacuum unit and a heating unit before sampling, high-temperature and high-vacuum purification treatment of the sampling path can be achieved, the interference of adsorbed impurities can be removed, and the accuracy of sampling can be ensured.

[0008] Another object of the present invention is to provide a high-pressure hydrogen sampling device, which can ensure the portability of the device by placing the sampling device in a luggage box.

[0009] To achieve the above-mentioned purpose, the utility model provides a high-pressure hydrogen sampling device, which can be used to connect the hydrogenation gun, hydrogen storage tank or transport tank truck of a hydrogenation station, and at least includes: a high-pressure pipeline, which includes three branch pipelines, each branch pipeline is respectively provided with a first sampling inlet, a second sampling inlet, a third sampling inlet and a high-pressure ball valve and a one-way valve of the corresponding branch; a pressure reducing valve is provided at the end of the high-pressure pipeline; a low-pressure pipeline is connected to the pressure reducing valve and is provided with a three-way valve at the end of the pipeline, and the three-way valve is used to selectively connect the venting component and the sampling cylinder; a vacuum unit is provided on the low-pressure pipeline for vacuum purification of the sampling passage before sampling.

[0010] Furthermore, in the above technical solution, the first sampling inlet can be used to connect to a hydrogen storage tank or transport tank truck, and a first high-pressure ball valve and a first one-way valve are sequentially connected on the corresponding branch pipeline; the second sampling inlet can be used to connect to a 35MPa hydrogenation gun at a hydrogenation station, and a second high-pressure ball valve and a second one-way valve are sequentially connected on the corresponding branch pipeline; the third sampling inlet can be used to connect to a 70MPa hydrogenation gun at a hydrogenation station, and a third high-pressure ball valve and a third one-way valve are sequentially connected on the corresponding branch pipeline. The third sampling inlet is preferably provided with an infrared communication interface.

[0011] Furthermore, in the above technical solution, the vacuum unit may include a vacuum pump and a vacuum gauge, connected to the low-pressure pipeline via a low-pressure ball valve. Furthermore, the high-pressure pipeline, the low-pressure pipeline, and the valves on the pipelines may be wrapped with heating tape (i.e., a heating unit) to heat the sampling path before sampling. Furthermore, the internal surfaces of the pipelines and valves in the device of the present invention are all passivated.

[0012] Furthermore, in the above technical solution, the vent assembly can be a vent pipe with multiple sections; during the sampling process, the multiple sections of the vent pipe are connected end to end and placed vertically to meet the discharge height standard requirements.

[0013] Furthermore, in the above technical solution, a high-pressure pressure gauge is provided on the high-pressure pipeline, and a low-pressure pressure gauge and a safety valve are provided on the low-pressure pipeline.

[0014] Furthermore, in the above technical solution, when the sampling device is not in use, except for the sampling cylinder, all of it can be placed in a suitcase for easy carrying.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) The utility model can convert the sampled high-pressure hydrogen into low-pressure hydrogen, and then obtain the sampled gas through the sampling cylinder; it can be adapted to the interfaces of hydrogen storage tanks and transport tank trucks, 35MPa hydrogenation guns at hydrogenation stations, and 70MPa hydrogenation guns at hydrogenation stations, making sampling more adaptable;

[0017] 2) The third sampling inlet of the utility model is provided with an infrared communication interface, which can transmit the data of the sampling device for display and analysis, ensuring the smooth progress of 70Mpa high-pressure hydrogen sampling;

[0018] 3) The pipes and valves of the present invention are all equipped with a heating unit (i.e., a wrapped heating tape) and a vacuum unit (i.e., a vacuum pump and a vacuum gauge), which can thoroughly purify the impurities adsorbed inside the device pathway before sampling;

[0019] 4) The internal surfaces of the pipes and valves of the present invention are passivated to prevent the adsorption of impurities specified in GB / T37244 "Hydrogen Fuel for Proton Exchange Membrane Fuel Cell Vehicles";

[0020] 5) All pipelines and valves of the device of the utility model have been connected and wrapped with heating belts before sampling. The multi-section vent pipes are in a disassembled and separated state. Before on-site sampling, it is only necessary to prepare a sampling cylinder and connect the vent pipes to complete the sampling preparation work. The device has a compact structure and can be stored and transported in a suitcase, which is convenient for sampling work. The utility model can ensure sampling safety through the use of safety valves, ground wires and vent components.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, and to make the above and other purposes, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a connection diagram of the high-pressure hydrogen sampling device of the utility model.

[0023] Figure 2 The figure is a schematic diagram of the arrangement of the high-pressure hydrogen sampling device of the utility model placed in a luggage compartment.

[0024] Description of main reference numerals:

[0025] 1- High-pressure pipeline, 11A- First sampling inlet, 11B- Second sampling inlet, 11C- Third sampling inlet, 12A- First high-pressure ball valve, 12B- Second high-pressure ball valve, 12C- Third high-pressure ball valve, 13A- First check valve, 13B- Second check valve, 13C- Third check valve, 14- Pressure reducing valve, 15- High-pressure pressure gauge, 2- Low-pressure pipeline, 21- Three-way valve, 22- Vent assembly, 221- Vent pipe, 23- Sampling cylinder, 24- Vacuum unit, 25- Low-pressure ball valve, 26- Low-pressure pressure gauge, 27- Safety valve;

[0026] 100-suitcase. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0028] Unless expressly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0029] In this document, for ease of description, spatially relative terms such as "below," "beneath," "down," "above," "above," etc. may be used to describe the relationship of one element or feature to another element or feature in the accompanying drawings. It should be understood that the spatially relative terms are intended to encompass different orientations of an object in use or operation in addition to the orientation depicted in the drawings. For example, if the object in the figure is turned over, the element described as being "below" or "below" other elements or features will be oriented "above" the element or feature. Therefore, the exemplary term "below" can include both below and above directions. Objects may also have other orientations (rotated 90 degrees or other orientations) and the spatially relative terms used herein should be interpreted accordingly.

[0030] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit specific positions or relative relationships. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable with each other.

[0031] like Figure 1As shown, the utility model provides a high-pressure hydrogen sampling device that can be used to connect the hydrogenation gun, hydrogen storage tank or transport tank truck of the hydrogenation station (not shown in the figure), and at least includes a high-pressure pipeline 1 and a low-pressure pipeline 2. Among them, the high-pressure pipeline 1 includes three branch pipelines, each of which is respectively provided with a first sampling inlet 11A, a second sampling inlet 11B, a third sampling inlet 11C and a high-pressure ball valve and a one-way valve of the corresponding branch; a pressure reducing valve 14 is provided at the end of the high-pressure pipeline 1, and a high-pressure pressure gauge 15 can also be provided on the high-pressure pipeline 1. The low-pressure pipeline 2 is connected to the pressure reducing valve 14 and is provided with a three-way valve 21 at the end of the pipeline. The three-way valve 21 is used to selectively connect the venting component 22 and the sampling cylinder 23 (that is, the venting component and the sampling cylinder are connected respectively by switching). The low-pressure pipeline 2 is provided with a vacuum unit 24 for vacuum purification of the sampling path before sampling, and the low-pressure pipeline 2 can also be provided with a low-pressure pressure gauge 26 and a safety valve 27.

[0032] By adopting the above-mentioned technical solution of the present invention, the sampled high-pressure hydrogen can be converted into low-pressure hydrogen, and then the sampled gas can be obtained through the sampling cylinder; through the setting of the first sampling inlet, the second sampling inlet and the third sampling inlet, the interfaces of the hydrogen storage tank and transport tank truck, the 35MPa hydrogenation gun of the hydrogenation station and the 70MPa hydrogenation gun of the hydrogenation station can be adapted respectively, and the sampling adaptability is stronger, which enables sampling from the high-pressure and high-purity hydrogen at 35MPa and 70Mpa hydrogenation stations, as well as sampling from hydrogen storage tanks and transport tank trucks; the vacuum unit arranged in the pipeline can thoroughly purify the impurities adsorbed inside the device passage.

[0033] Further Figure 1 As shown, specifically, the first sampling inlet 11A is used to connect to a hydrogen storage tank or transport tank truck, and is connected in sequence to a first high-pressure ball valve 12A and a first one-way valve 13A on the corresponding branch pipeline. The second sampling inlet 11B is used to connect to a 35MPa hydrogenation gun at a hydrogenation station, and is connected in sequence to a second high-pressure ball valve 12B and a second one-way valve 13B on the corresponding branch pipeline. The third sampling inlet 11C is used to connect to a 70MPa hydrogenation gun at a hydrogenation station, and is connected in sequence to a third high-pressure ball valve 12C and a third one-way valve 13C on the corresponding branch pipeline. Preferably, but not restrictively, the third sampling inlet 11C can be provided with an infrared communication interface to transmit data from the sampling device for display and analysis, ensuring smooth 70MPa high-pressure hydrogen sampling.

[0034] Further Figure 1As shown, the vacuum unit 24 may include a vacuum pump and a vacuum gauge (not shown in the figure), and the vacuum unit 24 is connected to the low-pressure pipeline 2 through a low-pressure ball valve 25. The high-pressure pipeline 1, the low-pressure pipeline 2, and the valves and other facilities on the pipeline of the utility model are all wrapped with a heating tape (not shown in the figure), which is used to perform high-temperature treatment on the sampling path before sampling. The pipelines and valves of the utility model are all provided with a heating unit (that is, a wrapped heating tape) and a vacuum unit (that is, a vacuum pump and a vacuum gauge), which can thoroughly purify the impurities adsorbed inside the device path before sampling. Furthermore, the internal surfaces of the pipelines and valves of the device of the utility model are all passivated surfaces, and such treatment can prevent the adsorption of impurities specified in GB / T37244 "Hydrogen Fuel for Proton Exchange Membrane Fuel Cell Vehicles".

[0035] Further Figure 1 、 2 As shown, the vent assembly 22 is preferably a vent pipe 221 with multiple sections (refer to Figure 2 During the sampling process, the multiple sections of the vent pipe 221 are connected end to end and placed vertically to meet the discharge height standard requirements. It should be noted here that the high-pressure hydrogen sampling device of the present invention is portable, that is, when the sampling device is not in use, except for the sampling cylinder 23, it can be placed in the luggage box 100 and carried around, which is convenient for the sampling personnel to use. Figure 2 Inside the luggage case 100, all pipes and valves are connected and wrapped with heating tape. The multi-section vent tube 221 is disassembled and separated. For on-site sampling, simply prepare a sampling cylinder 23 and connect the vent tubes to complete the sampling preparation. The safety valve 27, ground wire, and vent assembly 22 ensure safe sampling. The compact design allows for storage and transportation in a luggage compartment, making sampling more convenient.

[0036] The sampling process of the present invention is described in detail below:

[0037] Before sampling, close the corresponding high-pressure ball valve and three-way valve 21 of the high-pressure pipeline 1, open the vacuum unit 24 and the heating unit to achieve high-temperature and high-vacuum purification treatment, and completely desorb the impurities adsorbed inside the sampling device; when sampling, connect the corresponding sampling inlet to the hydrogenation gun, storage tank or transport tank truck of the hydrogenation station, and connect the three-way valve 21 of the low-pressure pipeline 2 to the venting component 22, the sampling cylinder 23 and the safety ground wire; hydrogen sampling is connected to the hydrogenation gun or hydrogen storage tank or transport tank truck of the hydrogenation station through the high-pressure pipeline 1, and the low-pressure pipeline 2 is connected to the sampling cylinder 23. The high-pressure hydrogen is introduced through the pressure reducing valve 14 to reduce the pressure of the introduced hydrogen to the preset pressure and then filled into the sampling cylinder 23. To prevent the gas in the device from affecting the purity and safety of hydrogen, before introducing the hydrogen to be sampled, open the corresponding high-pressure ball valve of the high-pressure pipeline 1, close the three-way valve 21, start the hydrogenation machine to fill the device with hydrogen, close the corresponding ball valve of the high-pressure pipeline 1, open the vent assembly 22 passage of the three-way valve 21, discharge the hydrogen inside the device, and complete a gas replacement inside the device; repeat this replacement process until there are no impurities inside the sampling device, improve the safety of the hydrogen sampling process, and ensure sampling accuracy; when sampling hydrogen, close the vent assembly 22 passage of the three-way valve 21, open the corresponding high-pressure ball valve of the high-pressure pipeline 1, start the hydrogenation machine, open the cylinder valve of the sampling cylinder 23, close the cylinder valve after the sampling cylinder 23 is filled with hydrogen, close the hydrogenation machine, open the vent assembly 22 passage of the three-way valve 22, empty the hydrogen inside the device, and complete a hydrogen sampling operation. When repeated sampling is required, the device replacement and sampling process can be repeated.

[0038] The foregoing descriptions of specific exemplary embodiments of the present invention are for illustrative and illustrative purposes. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations are possible based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize the various exemplary embodiments of the present invention and various options and variations. Any simple modifications, equivalent variations, and modifications made to the above exemplary embodiments should fall within the scope of protection of the present invention.

Claims

1. A high-pressure hydrogen sampling device, characterized in that: It can be used to connect to hydrogen filling station’s hydrogen refueling gun, hydrogen storage tank or transport tank truck, including: The high-pressure pipeline includes three branch pipelines, each branch pipeline is provided with a first sampling inlet, a second sampling inlet, a third sampling inlet and a high-pressure ball valve and a one-way valve of the corresponding branch; a pressure reducing valve is provided at the end of the high-pressure pipeline; A low-pressure pipeline is connected to the pressure reducing valve and is provided with a three-way valve at the end of the pipeline. The three-way valve is used to selectively connect the venting component and the sampling cylinder; a vacuum unit is provided on the low-pressure pipeline for vacuum purification of the sampling passage before sampling.

2. The high-pressure hydrogen sampling device according to claim 1, characterized in that: The first sampling inlet is used to be connected to a hydrogen storage tank or a transport tank truck, and is connected in sequence to a first high-pressure ball valve and a first one-way valve on the corresponding branch pipeline; the second sampling inlet is used to be connected to a 35MPa hydrogenation gun of a hydrogenation station, and is connected in sequence to a second high-pressure ball valve and a second one-way valve on the corresponding branch pipeline; the third sampling inlet is used to be connected to a 70MPa hydrogenation gun of a hydrogenation station, and is connected in sequence to a third high-pressure ball valve and a third one-way valve on the corresponding branch pipeline.

3. The high-pressure hydrogen sampling device according to claim 2, characterized in that: The third sampling inlet is provided with an infrared communication interface.

4. The high-pressure hydrogen sampling device according to claim 1, characterized in that: The vacuum unit includes a vacuum pump and a vacuum gauge, and the vacuum unit is connected to the low-pressure pipeline through a low-pressure ball valve.

5. The high-pressure hydrogen sampling device according to claim 1, characterized in that: The high-pressure pipeline, the low-pressure pipeline and the valves on the pipeline are all wrapped with heating tapes, which are used to perform high-temperature treatment on the sampling path before sampling.

6. The high-pressure hydrogen sampling device according to claim 1, characterized in that: The vent assembly is a vent pipe with multiple sections. During the sampling process, the multiple sections of the vent pipe are connected end to end and placed vertically to meet the discharge height standard requirements.

7. The high-pressure hydrogen sampling device according to claim 1, characterized in that: The high-pressure pipeline is provided with a high-pressure pressure gauge.

8. The high-pressure hydrogen sampling device according to claim 1, characterized in that: The low-pressure pipeline is provided with a low-pressure pressure gauge and a safety valve.

9. The high-pressure hydrogen sampling device according to claim 1, characterized in that: When not in use, the sampling device, except for the sampling cylinder, is placed in the luggage box.

10. The high-pressure hydrogen sampling device according to claim 1, characterized in that: The internal surfaces of the pipelines and valves of the device are all passivated surfaces.

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