Integrated bottleneck valve capable of connecting multiple hydrogen cylinders in parallel

Abstract

The utility model discloses an integrated bottleneck valve capable of connecting a plurality of hydrogen cylinders in parallel, which relates to the technical field of bottleneck valves, and comprises a valve body and a plurality of parallel connection pipelines, and the valve body is provided with a plurality of interfaces used for connecting the plurality of parallel connection pipelines; a pressure pipeline is arranged in the valve body, a first-stage pressure reducing valve and a second-stage pressure reducing valve are connected to the pressure pipeline in series, and a hydrogen outlet is formed in the tail end of the pressure pipeline; the tail end of the parallel connection pipeline is connected with the hydrogen bottle group; according to the utility model, the plurality of ports of the valve body are connected with the plurality of parallel pipelines, and the hydrogen cylinders are connected and sealed through the screwed joints at the tail ends of the parallel pipelines, so that all hydrogen cylinders of the hydrogen cylinder group are connected in parallel and are communicated with the inner cavity of the valve body, and the pressure of all hydrogen cylinders is kept consistent; in addition, two-stage pressure reduction is carried out through the first-stage pressure reducing valve and the second-stage pressure reducing valve to ensure that the pressure of each hydrogen bottle is uniformly reduced, so that the problems that hydrogen supply of the hydrogen bottles lags behind and the system efficiency is reduced are solved, and the efficiency and the dynamic response speed of the fuel cell system can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of bottle neck valve technology, specifically to an integrated bottle neck valve that can connect multiple hydrogen cylinders in parallel. Background Technology

[0002] High-pressure hydrogen storage cylinders are the main method of hydrogen storage for fuel cell vehicles. The cylinder valve (referred to as the cylinder valve) is one of the key components that ensures the safety of the hydrogen system in the event of a car collision, fire or other accidents. Existing hydrogen fuel cell systems often use single-cylinder high-pressure hydrogen storage (35MPa / 70MPa), and the pressure is reduced by an integrated cylinder valve containing a single-stage or double-stage pressure reducing valve before being supplied to the fuel cell stack.

[0003] In long-range or high-power scenarios, the system needs to connect multiple hydrogen cylinders in parallel to meet the flow requirements. The traditional solution is to equip each high-pressure hydrogen cylinder with an integrated cylinder valve, and finally connect them in parallel to the fuel cell stack using compression fittings. For example, Chinese patent CN212510500U mentions a parallel-connected on-board hydrogen supply system for fuel cell vehicles, which includes a first hydrogen cylinder, a second hydrogen cylinder, a third hydrogen cylinder, a fourth hydrogen cylinder, a rectangular frame, a base plate, a pressure reduction module, and a hydrogen refueling module. The cylinders of the first, second, third, and fourth hydrogen cylinders are equipped with cylinder valves, and the inlet and outlet of the cylinder valves are connected to high-pressure pipelines and low-pressure pipelines, respectively.

[0004] This solution employs a modular hydrogen supply system connected in parallel. While this reduces the probability of system leakage and improves the stability of the vehicle's onboard system, it also presents a problem: when multiple tanks are connected in parallel, initial pressure differences or uneven pressure drops during use can lead to delayed emptying of some tanks. This reduces system efficiency and makes it difficult to adapt to rapid changes in fuel cell load. Furthermore, equipping each hydrogen tank with a valve increases system weight and cost, and also reduces system safety. Utility Model Content

[0005] To address one or more shortcomings of the existing technology, this utility model provides an integrated bottle neck valve that can connect multiple hydrogen cylinders in parallel. This valve enables the parallel connection of multiple hydrogen cylinders, ensuring consistent pressure across all cylinders within the hydrogen cylinder group at all times. The pressure is reduced through a two-stage pressure reduction process before entering the fuel cell stack, thereby improving the efficiency and dynamic response speed of the fuel cell system. Simultaneously, it simplifies the system structure and enhances system safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated cylinder valve for connecting multiple hydrogen cylinders in parallel includes a valve body and multiple parallel pipelines. The valve body has multiple interfaces for connecting the multiple parallel pipelines. The valve body has a pressure pipeline inside, and a primary pressure reducing valve and a secondary pressure reducing valve are connected in series on the pressure pipeline. The end of the pressure pipeline is a hydrogen outlet. The end of the parallel pipeline is connected to the hydrogen cylinder group.

[0008] As a further implementation, the valve body is provided with a hydrogen charging connector on its side, which is connected to an external hydrogen charging pipeline, and the hydrogen charging pipeline is connected to a pressure pipeline through the hydrogen charging connector.

[0009] As a further implementation, a filter is provided at the connection between the hydrogen charging connector and the pressure pipeline to prevent foreign matter in the hydrogen from entering the valve body.

[0010] As a further implementation, a one-way valve is provided between the valve body and the filter to prevent backflow during hydrogen charging.

[0011] As a further implementation, the upper part of the valve body is provided with a safety valve interface, and a safety valve is installed at the safety valve interface, the safety valve being connected to the atmosphere; the outer surface of the safety valve interface has a spherical structure for easy sealing.

[0012] As a further implementation, a pressure sensor interface is provided on the upper part of the valve body, and a pressure sensor is installed at the pressure sensor interface; the pressure sensor is connected to the hydrogen cylinder group through the valve body to ensure that there is no pressure difference between the two.

[0013] As a further implementation, the pressure sensor interface is provided with a sealing groove for sealing.

[0014] As a further implementation, the pressure pipeline is connected between the valve body cavity and the check valve. The pressure pipeline is equipped with a shut-off valve connected in parallel with the secondary pressure reducing valve. The outlet of the primary pressure reducing valve is connected to the inlet of the secondary pressure reducing valve and the shut-off valve, respectively. The outlet of the secondary pressure reducing valve is connected to the hydrogen outlet. The shut-off valve can control the on / off of hydrogen output.

[0015] As a further implementation, the first-stage pressure reducing valve is a piston-type pressure reducing valve, which can reduce the pressure from 35 MPa to 10 MPa; the second-stage pressure reducing valve is a diaphragm-type precision pressure reducing valve, which can reduce the pressure from 10 MPa to the target pressure required by the hydrogen fuel cell.

[0016] As a further implementation, a bottle mouth filter is provided at the connection point between the end of the parallel pipeline and the hydrogen cylinder to prevent impurities from entering the hydrogen cylinder.

[0017] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model connects multiple parallel pipelines through multiple interfaces around the valve body, and connects and seals the hydrogen cylinders at the ends of the parallel pipelines to the hydrogen cylinders. This achieves parallel connection of all hydrogen cylinders in the hydrogen cylinder group to the inner cavity of the valve body, ensuring that the pressure of all hydrogen cylinders remains consistent. In addition, a two-stage pressure reducing valve is used to ensure uniform pressure drop in each hydrogen cylinder, thereby avoiding the situation where the initial pressure of the hydrogen cylinders is different or the pressure drop is uneven during use. This solves the problem of delayed hydrogen supply from the hydrogen cylinders and reduced system efficiency, and can effectively improve the efficiency and dynamic response speed of the fuel cell system.

[0019] 2. The integrated bottle neck valve of this utility model can connect all the hydrogen cylinders of the hydrogen cylinder group with multiple parallel pipelines through a single bottle neck valve. Compared with the traditional solution of equipping each hydrogen cylinder with an integrated bottle neck valve, it greatly simplifies the system structure, reduces costs, and improves system safety. It is especially suitable for hydrogen fuel cell drones and hydrogen fuel cell quadruped robots. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0021] Figure 1 This is a schematic diagram illustrating the working principle of an integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel, according to an embodiment of this utility model.

[0022] Figure 2 This is a cross-sectional structural diagram of an integrated bottle neck valve that can connect multiple hydrogen cylinders in parallel, according to an embodiment of the present invention.

[0023] In the diagram: 1. Pressure sensor; 2. Shut-off valve; 3. Primary pressure reducing valve; 4. Secondary pressure reducing valve; 5. Check valve; 6. Hydrogen charging connector; 7. Filter; 8. Hydrogen cylinder assembly; 9. Bottle mouth filter; 10. Safety valve; 11. Hydrogen cylinder connection port; 12. Valve body; 13. Hydrogen outlet. Detailed Implementation

[0024] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] It should be noted that the terminology used herein is for descriptive purposes only and is not intended to limit the exemplary embodiments according to this invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0026] Example 1

[0027] In one typical embodiment of this application, an integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel is provided, such as... Figures 1-2 As shown, it includes a valve body 12 and multiple parallel pipelines. The valve body 12 has multiple interfaces, each of which is connected to a parallel pipeline. The valve body 12 has a pressure pipeline inside, and a primary pressure reducing valve 3 and a secondary pressure reducing valve 4 are connected in series on the pressure pipeline. The end of the pressure pipeline is a hydrogen outlet 13. The end of the parallel pipeline is connected to the hydrogen cylinder group 8.

[0028] Specifically, such as Figures 1-2 As shown, the integrated bottle valve of this embodiment includes a valve body 12 and parallel pipelines. The valve body contains a primary pressure sensor 3, a secondary pressure sensor 4, a one-way valve 5, and a filter 7. The side of the valve body is equipped with a shut-off valve 2, a safety valve 10, a hydrogen filling port 6, a pressure sensor 1, and a hydrogen outlet 13. The lower side of the valve body 12 has a hydrogen cylinder connection port 11 that matches the hydrogen cylinder assembly 8. This port is an externally threaded hole, with the through hole leading directly to the cavity in the middle of the valve body 12. The upper side of the cavity has a hydrogen gas passage connecting each valve component to the outlet. To prevent foreign objects from entering, a filter 9 is provided between the valve body 11 and the hydrogen cylinder assembly 8.

[0029] Combination Figure 1 and Figure 2 As shown, a safety valve interface is provided on the upper side of the valve body 12, and the safety valve 10 is located at this safety valve interface. The safety valve 10 is directly connected to the atmosphere, and the side of the valve body 14 near the safety valve 10 has a spherical structure for easy sealing. In this embodiment, the pressure sensor interface of the valve body is directly connected to the hydrogen cylinder group 8 to ensure that there is no pressure difference between the two, and a sealing groove is provided at the interface for sealing.

[0030] In this embodiment, as Figure 2 As shown, a hydrogen charging connector 6 is provided at one end of the valve body. The hydrogen charging connector 6 connects to an external hydrogen charging pipeline, which is connected to a pressure pipeline through the hydrogen charging connector to supply hydrogen. A filter 7 is provided at the connection point between the hydrogen charging connector 6 and the pressure pipeline to prevent foreign matter in the hydrogen from entering the valve body. Figure 1As shown, a one-way valve is provided between the valve body 12 and the filter 7 to prevent backflow during hydrogen charging.

[0031] In this embodiment, a bottle mouth filter 9 is provided at the connection point between the end of the parallel pipeline and the hydrogen cylinder group 8 to prevent impurities from entering the hydrogen cylinder.

[0032] In this embodiment, the primary pressure reducing valve 3 is a piston-type pressure reducing valve, which can reduce the pressure from 35 MPa to 10 MPa. The secondary pressure reducing valve 4 is a diaphragm-type precision pressure reducing valve, which can reduce the pressure from 10 MPa to the target pressure required by the hydrogen fuel cell. The shut-off valve 2 is located after the secondary pressure reducing valve 4 and can be manually adjusted to control the on / off of hydrogen output.

[0033] Specifically, in combination Figure 1 and Figure 2 As shown, the connection sequence of the hydrogen flow path is: hydrogen cylinder group 8, safety valve 10, primary pressure reducing valve 3, shut-off valve 2, secondary pressure reducing valve 4, and hydrogen outlet 13. During hydrogen filling, connect the hydrogen filling connector of the hydrogen refueling equipment to the hydrogen filling connector 6. The hydrogen gas sequentially passes through the hydrogen filling connector 6, filter 7, and one-way valve 5 into the hydrogen cylinder group 8. Since the hydrogen cylinders are connected by parallel pipelines 11, the pressure in each hydrogen cylinder remains consistent.

[0034] In this embodiment, the end of the parallel pipeline 11 that connects to the hydrogen cylinder group 8 is provided with threads and a sealing groove for connecting and sealing with the hydrogen cylinder.

[0035] In this embodiment, combined with Figure 1 and Figure 2 As shown, a pressure sensor interface is provided on the upper part of the valve body. Pressure sensor 1 is installed at this interface and is connected to the hydrogen cylinder group through valve body 12 to ensure that there is no pressure difference between them. A sealing groove is provided at the pressure sensor interface for sealing.

[0036] In this embodiment, as Figure 1 As shown, the pressure pipeline is connected between the inner cavity of the valve body 12 and the one-way valve 5. The pressure pipeline is equipped with a shut-off valve 2 connected in parallel with the secondary pressure reducing valve 4. The outlet of the primary pressure reducing valve 3 is connected to the inlet of the secondary pressure reducing valve 4 and the shut-off valve 2 respectively. The outlet of the secondary pressure reducing valve 4 is connected to the hydrogen outlet 13. The shut-off valve 2 can control the on / off of hydrogen output.

[0037] When in use, the user opens the shut-off valve 2, and the hydrogen gas passes through the primary filter 3 and is depressurized to about 10 MPa. Then, it passes through the shut-off valve 2 and is depressurized at the secondary pressure reducing valve 4 to the target operating pressure of the hydrogen fuel cell. Finally, it flows out of the bottle valve through the hydrogen outlet 13.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it. Those skilled in the art should understand that this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel, characterized in that, It includes a valve body and multiple parallel pipelines. The valve body has multiple interfaces for connecting multiple parallel pipelines. The valve body has a pressure pipeline inside, and a primary pressure reducing valve and a secondary pressure reducing valve are connected in series on the pressure pipeline. The end of the pressure pipeline is a hydrogen outlet. The end of the parallel pipeline is connected to a hydrogen cylinder group.

2. The integrated bottle neck valve for connecting multiple hydrogen cylinders in parallel as described in claim 1, characterized in that, The valve body is provided with a hydrogen charging connector on its side. The hydrogen charging connector is connected to an external hydrogen charging pipeline, and the hydrogen charging pipeline is connected to a pressure pipeline through the hydrogen charging connector.

3. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 2, characterized in that, A filter is installed at the connection between the hydrogen charging connector and the pressure pipeline.

4. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 3, characterized in that, A one-way valve is provided between the valve body and the filter.

5. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 1, characterized in that, The upper part of the valve body is provided with a safety valve interface, and a safety valve is installed at the safety valve interface. The safety valve is connected to the atmosphere; the outer surface of the safety valve interface is a spherical structure.

6. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 1, characterized in that, The upper part of the valve body is provided with a pressure sensor interface, and a pressure sensor is installed at the pressure sensor interface; the pressure sensor is connected to the hydrogen cylinder group through the valve body.

7. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 6, characterized in that, The pressure sensor interface is provided with a sealing groove.

8. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 1, characterized in that, The pressure pipeline is connected between the valve body cavity and the check valve. A shut-off valve is provided on the pressure pipeline in parallel with the secondary pressure reducing valve. The outlet of the primary pressure reducing valve is connected to the inlet of the secondary pressure reducing valve and the shut-off valve, respectively. The outlet of the secondary pressure reducing valve is connected to the hydrogen outlet.

9. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 1, characterized in that, The primary pressure reducing valve is a piston-type pressure reducing valve, and the secondary pressure reducing valve is a diaphragm-type precision pressure reducing valve.

10. An integrated bottle neck valve capable of connecting multiple hydrogen cylinders in parallel as described in claim 1, characterized in that, A bottle mouth filter is provided at the connection point between the end of the parallel pipeline and the hydrogen cylinder group.

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