70MPa hydrogen integrated two-stage pressure reduction control device

Abstract

The utility model relates to the technical field of hydrogen energy sources, in particular to a 70MPa hydrogen integrated two-stage pressure reduction control device which comprises a valve body, and a gas inlet channel, a high-pressure channel, a first-stage pressure reduction channel, a second-stage pressure reduction cavity and a gas outlet channel are formed in the valve body. The electromagnetic valve is arranged on the side of the valve body, an inlet of the electromagnetic valve communicates with the air inlet channel, and an outlet communicates with the high-pressure channel; the first-stage piston type pressure reducing mechanism is arranged on the valve body, an inlet of the first-stage piston type pressure reducing mechanism communicates with the high-pressure channel, and an outlet communicates with the first-stage pressure reducing channel; the second-stage diaphragm type pressure reducing mechanism is arranged at the top of the valve body, the outlet end of the second-stage diaphragm type pressure reducing mechanism is communicated with the second-stage pressure reducing cavity and can input pressure-reduced gas into the second-stage pressure reducing cavity, and the inlet end of the second-stage diaphragm type pressure reducing mechanism is communicated with the first-stage pressure reducing channel; and the second-stage pressure reducing cavity is connected with the air outlet channel. By means of the unique two-stage pressure reduction structural design, stable pressure reduction output of 70 Mpa hydrogen can be effectively achieved, and the structure is stable and compact.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy technology, and in particular to a 70MPa hydrogen integrated two-stage pressure reduction control device. Background Technology

[0002] In the field of hydrogen energy, hydrogen is a highly promising clean energy source. Its storage and transportation are usually carried out in the form of high pressure in order to store more hydrogen in a limited space and improve energy carrying efficiency. However, when high-pressure hydrogen enters the actual hydrogen-using equipment, it must be depressurized to meet the requirements of safe and stable operation of the equipment. Therefore, hydrogen pressure reducing valve has become a crucial component in hydrogen energy system.

[0003] Currently, there are many problems with existing hydrogen pressure reducing valves on the market. Most traditional pressure reducing valves adopt a single-stage pressure reducing structure, which cannot effectively buffer when faced with large fluctuations in high-pressure hydrogen pressure, resulting in unstable output pressure. This may cause equipment performance degradation or even failure for hydrogen-using equipment that is sensitive to pressure changes.

[0004] Furthermore, traditional designs are not entirely reasonable in terms of gas storage and transmission. Some secondary pressure reducing chambers introduce additional pressure fluctuations when storing depressurized hydrogen, which is not conducive to providing stable pressure hydrogen for subsequent hydrogen-using equipment. Moreover, the installation method and layout of the secondary diaphragm pressure reducing mechanism lack flexibility, and it is mostly a fixed built-in form, which is difficult to adapt to the diverse needs of different application scenarios for pressure reducing valve structure.

[0005] In summary, existing hydrogen pressure reducing valves have significant shortcomings in terms of structural design, pressure control, and gas handling. Furthermore, integrating these aspects would result in an excessively large size. Consequently, existing designs are insufficient to meet the requirements for high precision, high integration, high stability, and high adaptability of pressure reducing valves in the context of the widespread application of hydrogen energy. Utility Model Content

[0006] The present invention aims to solve the above-mentioned defects and provide a 70MPa hydrogen integrated two-stage pressure reduction control device.

[0007] In order to overcome the defects in the background technology, the technical solution adopted by this utility model to solve its technical problem is: a 70MPa hydrogen integrated two-stage pressure reduction control device, including a valve body, which has an inlet channel, a high-pressure channel, a first-stage pressure reduction channel, a second-stage pressure reduction chamber and an outlet channel inside.

[0008] A solenoid valve is disposed on the side of the valve body, with its inlet connected to the air intake channel and its outlet connected to the high-pressure channel;

[0009] A primary piston-type pressure reducing mechanism is provided on the valve body, with its inlet connected to the high-pressure channel and its outlet connected to the primary pressure reducing channel;

[0010] A two-stage diaphragm pressure reducing mechanism is located on the top of the valve body. Its outlet end is connected to the two-stage pressure reducing chamber, allowing the pressure-reduced gas to be input into the two-stage pressure reducing chamber. Its inlet end is connected to the first-stage pressure reducing channel.

[0011] The secondary pressure reducing chamber is connected to the air outlet channel.

[0012] Further improvements include the provision of a high-pressure sensor on the side of the valve body for measuring pressure within the high-pressure channel.

[0013] Further improvements include the installation of a high-pressure temperature sensor on the top of the valve body for measuring the temperature within the high-pressure channel.

[0014] Further improvements include the installation of a low-pressure sensor on the side of the valve body for measuring the air pressure in the outlet channel.

[0015] Further improvements include the installation of a low-pressure temperature sensor on the side of the valve body for measuring the air pressure in the outlet channel.

[0016] Further improvements include the installation of a filter element within the air intake passage to filter impurities and particles in the hydrogen entering the valve body.

[0017] Further improvements include the installation of a manual maintenance valve on the side of the valve body, with the output end of the manual maintenance valve connected to a venting channel opened within the valve body.

[0018] Further improvements include the provision of a safety valve channel within the valve body, which is connected to the air outlet channel.

[0019] Further improvements include the addition of an overflow valve connected in series on the primary pressure reducing channel, the overflow valve being located on the side of the valve body.

[0020] Further improvements include providing a ventilation bypass valve on the side of the valve body, wherein the air inlet of the ventilation bypass valve is connected to a ventilation channel opened in the valve body, and the ventilation channel is connected to the air inlet channel.

[0021] The beneficial effects of this utility model are as follows: This design adopts a unique two-stage pressure reduction structure. The first-stage piston-type pressure reduction mechanism provides initial pressure reduction, while the second-stage diaphragm-type pressure reduction mechanism further reduces pressure. This effectively buffers large fluctuations in high-pressure hydrogen pressure, ensuring stable output pressure and meeting the needs of hydrogen-using equipment sensitive to pressure changes, thus preventing equipment performance degradation or malfunction. The solenoid valve can precisely control the flow of hydrogen from the inlet channel into the high-pressure channel, achieving preliminary and precise control of the hydrogen flow rate. Combined with multiple pressure and temperature sensors, it can monitor the pressure and temperature of hydrogen in each channel in real time, facilitating timely adjustment of component operating status, accurately matching the system's real-time hydrogen flow and pressure requirements, and improving the system's energy utilization efficiency. A filter element is installed in the intake channel to filter impurities and particles in the hydrogen, preventing untreated high-pressure hydrogen from directly entering subsequent stages, reducing wear on internal precision components, extending the service life of the pressure reducing device, and improving pressure reduction accuracy. A manual maintenance valve is installed on the valve body, which can quickly discharge hydrogen when the system needs pressure release or maintenance. The safety valve channel is connected to the outlet channel. When the pressure in the outlet channel exceeds the safe value, the safety valve automatically opens to release pressure, preventing the system from being dangerous due to excessive pressure. An overflow valve is connected in series in the first-stage pressure reducing channel. When a leak or break in the downstream pipeline causes excessive hydrogen flow, the overflow valve is activated to avoid dangers such as fire and explosion. This design has higher integration and a more compact structure. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is the front view of this utility model;

[0024] Figure 2 yes Figure 1 KK section view;

[0025] Figure 3 yes Figure 1 FF section view;

[0026] Figure 4 This is a top view of the present invention;

[0027] Figure 5 yes Figure 4 DD section view;

[0028] Figure 6 This is the right view of this utility model;

[0029] Figure 7 yes Figure 6 Sectional view of section II;

[0030] Figure 8 This is the left view of this utility model;

[0031] Figure 9 yes Figure 8 A cross-sectional view of JJ;

[0032] Figure 10 This is a rear view of the present invention;

[0033] Figure 11 This is an axonometric view of the present invention;

[0034] In the diagram, 1-Filter element, 2-Inlet channel, 3-Solenoid valve, 4-High pressure channel, 5-High pressure sensor, 6-High pressure temperature sensor, 7-First-stage piston pressure reducing mechanism, 8-First-stage pressure reducing channel, 9-Relief valve, 10-Second-stage diaphragm pressure reducing mechanism, 11-Second-stage pressure reducing chamber, 12-Outlet channel, 13-Safety valve channel, 14-Low pressure sensor, 15-Low pressure temperature sensor, 16-Manual maintenance valve, 17-Vent channel, 18-Valve body, 19-Ventilation bypass valve, 20-Ventilation channel. Detailed Implementation

[0035] 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. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort in accordance with the embodiments of the basic utility model are within the scope of protection of this utility model.

[0036] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 as well as Figure 11 A 70MPa hydrogen integrated two-stage pressure reduction control device includes a valve body 18, which has an inlet channel 2, a high-pressure channel 4, a first-stage pressure reduction channel 8, a second-stage pressure reduction chamber 11, and an outlet channel 12. The inlet channel 2 is used to introduce hydrogen to be depressurized, the high-pressure channel 4 is used to transmit high-pressure hydrogen that has not undergone preliminary treatment, the first-stage pressure reduction channel 8 performs first-stage pressure reduction on the hydrogen, the second-stage pressure reduction chamber 11 is used to store the hydrogen after second-stage pressure reduction and to install the second-stage diaphragm pressure reduction mechanism 10, and the outlet channel 12 outputs the finally depressurized hydrogen to supply a hydrogen energy battery.

[0037] Solenoid valve 3 is located on the side of valve body 18. Its inlet is connected to the air intake channel 2 and its outlet is connected to the high pressure channel 4. The function of solenoid valve 3 is to control the flow of hydrogen from the air intake channel 2 into the high pressure channel 4. It can precisely open or close the flow of hydrogen according to system requirements to achieve preliminary control of hydrogen flow rate.

[0038] A first-stage piston-type pressure reducing mechanism 7 is disposed on the valve body 18, with its inlet connected to the high-pressure channel 4 and its outlet connected to the first-stage pressure reducing channel 8;

[0039] The secondary diaphragm pressure reducing mechanism 10 is located on the top of the valve body 18. Its outlet end is connected to the secondary pressure reducing chamber 11, which can input the depressurized gas into the secondary pressure reducing chamber 11. Its inlet end is connected to the primary pressure reducing channel (8). The primary piston pressure reducing mechanism 7 initially depressurizes the high-pressure hydrogen gas in the high-pressure channel 4 from 0-875 barg to about 25 barg, reducing the pressure of the hydrogen gas and preparing for the subsequent secondary pressure reduction, so as to meet the system's requirements for gradual adjustment of hydrogen gas pressure. In this design, the secondary diaphragm pressure reducing mechanism 10 is designed externally, which is more conducive to replacement and maintenance.

[0040] The secondary pressure reducing chamber 11 is connected to the gas outlet channel 12 to output the depressurized hydrogen to the outside. The depressurized hydrogen is output through the gas outlet channel 12 to provide hydrogen with stable pressure for subsequent hydrogen-using equipment.

[0041] In this embodiment, a high-pressure sensor 5 is arranged on the side of the valve body 18 for measuring the pressure in the high-pressure channel 4. This sensor is used to monitor the hydrogen pressure in the high-pressure channel 4 in real time. By monitoring the pressure in the high-pressure channel 4, it can be ensured that the hydrogen is within a suitable pressure range before the first-stage pressure reduction. If the pressure is abnormal, the working status of the solenoid valve 3 or other components can be adjusted in time to ensure the safe and stable operation of the system.

[0042] In this embodiment, a high-pressure temperature sensor 6 is provided on the top of the valve body 18 for measuring the temperature inside the high-pressure channel 4. This sensor monitors the temperature of the hydrogen gas inside the high-pressure channel 4. Since temperature affects the physical properties of hydrogen gas, monitoring the temperature of the hydrogen gas inside the high-pressure channel 4 helps to understand the thermodynamic characteristics of hydrogen gas under high pressure, providing a basis for system performance evaluation and safety control.

[0043] In this embodiment, a low-pressure sensor 14 is provided on the side of the valve body 18 for measuring the gas pressure in the gas outlet channel 12. This sensor is used to monitor the hydrogen gas pressure in the gas outlet channel 12 in real time. By monitoring the pressure in the gas outlet channel 12, it can be ensured that the output hydrogen pressure is stable and meets the requirements of the hydrogen-using equipment. If the pressure fluctuates, the operating parameters of the first-stage piston pressure reducing mechanism 7 and the second-stage diaphragm pressure reducing mechanism 10 can be adjusted in time to ensure the stability of the output pressure.

[0044] In this embodiment, a low-pressure temperature sensor 15 is provided on the side of the valve body 18 for measuring the gas pressure in the outlet channel 12. This sensor measures the temperature of the hydrogen gas in the outlet channel 12. By monitoring the temperature of the hydrogen gas in the outlet channel 12, we can understand the temperature change of the hydrogen gas during the decompression process, determine whether the decompression process is normal, and also provide a reference for the safe operation of subsequent hydrogen-using equipment.

[0045] In this embodiment, a filter element 1 is installed in the air intake channel 2 to filter impurities and particles in the hydrogen entering the valve body 18. An air intake connector can be installed at the inlet of the air intake channel 2 to connect to an external hydrogen supply pipeline, ensuring that hydrogen can smoothly enter the air intake channel 2.

[0046] In this embodiment, a manual maintenance valve 16 is arranged on the side of the valve body 18. The output end of the manual maintenance valve 16 is connected to the venting channel 17 opened in the valve body 18. When the system needs to release pressure or perform maintenance, the low-pressure hydrogen gas in the valve body 18 can be immediately discharged through the venting channel 17 by opening the manual maintenance valve 16 to ensure the safety of the system.

[0047] In this embodiment, a safety valve channel 13 is provided in the valve body 18. The safety valve channel 13 is connected to the gas outlet channel 12. The safety valve channel 13 is used to install a safety valve. When the pressure in the gas outlet channel 12 exceeds the set safety value, the safety valve will automatically open to discharge excess hydrogen gas, prevent the system from being dangerous due to excessive pressure, and ensure the safe operation of the system.

[0048] In this embodiment, an outlet connector is installed on the outlet end of the outlet channel 12 for connecting to subsequent hydrogen-using equipment, so that the depressurized hydrogen can be smoothly delivered to the hydrogen-using equipment.

[0049] In this embodiment, an overflow valve 9 is connected in series on the primary pressure reducing channel 8. The overflow valve 9 is located on the side of the valve body 18. The overflow valve 9 plays a role in stabilizing and overflowing between the primary piston-type pressure reducing mechanism 7 and the secondary diaphragm-type pressure reducing mechanism 10. During the use of hydrogen, if the downstream pipeline leaks or breaks due to an accident, the hydrogen flow rate will be too large. At this time, the overflow valve 9 will be activated to prevent a large amount of hydrogen from being discharged, thus avoiding dangers such as fire or explosion.

[0050] A bypass valve 19 is provided on the side of the valve body 18. The air inlet of the bypass valve 19 is connected to the air exchange channel 20 opened inside the valve body 18. The air exchange channel 20 is connected to the air inlet channel 2. The purpose of designing the bypass valve 19 is to be able to vent the high-pressure gas in the gas cylinder when the solenoid valve 3 malfunctions.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A 70 MPa hydrogen integrated two-stage pressure reducing control device, characterized by, It includes a valve body (18), which has an air intake channel (2), a high pressure channel (4), a primary pressure reducing channel (8), a secondary pressure reducing chamber (11), and an air outlet channel (12). Solenoid valve (3) is mounted on valve body (18), with its inlet connected to air intake channel (2) and its outlet connected to high pressure channel (4); A first-stage piston-type pressure reducing mechanism (7) is installed on the valve body (18), with its inlet connected to the high-pressure channel (4) and its outlet connected to the first-stage pressure reducing channel (8); A secondary diaphragm pressure reducing mechanism (10) is located on the top of the valve body (18). Its outlet end is connected to the secondary pressure reducing chamber (11) so that the pressure-reduced gas can be input into the secondary pressure reducing chamber (11), and its inlet end is connected to the primary pressure reducing channel (8). The secondary pressure reducing chamber (11) is connected to the air outlet channel (12).

2. The 70 MPa hydrogen integrated two-stage pressure reducing control device according to claim 1, characterized by: The valve body (18) is provided with a high pressure sensor (5) for measuring the pressure in the high pressure channel (4) on its side.

3. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 2, characterized in that: The valve body (18) is equipped with a high-pressure temperature sensor (6) on its top for measuring the temperature inside the high-pressure channel (4).

4. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 1, characterized in that: A low-pressure sensor (14) for measuring the air pressure in the air outlet channel (12) is provided on the side of the valve body (18).

5. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 4, characterized in that: A low-pressure temperature sensor (15) for measuring the air pressure in the outlet channel (12) is provided on the side of the valve body (18).

6. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 1, characterized in that: The air intake channel (2) is equipped with a filter element (1) for filtering impurities and particles in the hydrogen entering the valve body (18).

7. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 1, characterized in that: A manual maintenance valve (16) is arranged on the side of the valve body (18), and the output end of the manual maintenance valve (16) is connected to the venting channel (17) opened inside the valve body (18).

8. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 1, characterized in that: The valve body (18) has a safety valve passage (13) inside, and the safety valve passage (13) is connected to the air outlet passage (12).

9. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 1, characterized in that: An overflow valve (9) is connected in series on the primary pressure reducing channel (8), and the overflow valve (9) is located on the side of the valve body (18).

10. The 70MPa hydrogen integrated two-stage pressure reduction control device as described in claim 1, characterized in that: A bypass valve (19) is provided on the side of the valve body (18). The air inlet of the bypass valve (19) is connected to the air exchange channel 20 opened in the valve body (18). The air exchange channel 20 is connected to the air inlet channel (2).

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