Hydrogen station diaphragm compressor hydrogen storage control line

Abstract

The application discloses a hydrogenation station diaphragm compressor hydrogen storage control pipeline, and aims to solve the technical problem of premature failure of a diaphragm caused by violent impact of the diaphragm on a gas disc during shutdown of the diaphragm compressor or hydrogen storage operation. The hydrogenation station diaphragm compressor hydrogen storage control pipeline comprises an exhaust pipeline in communication with an exhaust end of a diaphragm compressor, a high-pressure hydrogen storage branch, a medium-pressure hydrogen storage branch and a low-pressure hydrogen storage branch, one end of each of the high-pressure hydrogen storage branch, the medium-pressure hydrogen storage branch and the low-pressure hydrogen storage branch being in communication with an outlet of the exhaust pipeline, the other end of each of the high-pressure hydrogen storage branch, the medium-pressure hydrogen storage branch and the low-pressure hydrogen storage branch being respectively connected to a high-pressure hydrogen storage bottle group, a medium-pressure hydrogen storage bottle group or a low-pressure hydrogen storage bottle group, a controller, and a pressure regulating valve group in communication connection with the controller and corresponding to the exhaust end of the diaphragm compressor and used for gradually reducing the exhaust pressure of the exhaust end of the diaphragm compressor by gradually adjusting the opening degree. The hydrogenation station diaphragm compressor hydrogen storage control pipeline realizes smooth transition of the pressure of the exhaust end of the diaphragm compressor during tank cutting and shutdown, and avoids the problem of diaphragm impact.

Description

Technical Field

[0001] This application relates to the field of hydrogen storage technology for hydrogen refueling stations, specifically to a hydrogen storage control pipeline for a diaphragm compressor at a hydrogen refueling station. Background Technology

[0002] A hydrogen diaphragm compressor is a device that compresses hydrogen by using a flexible metal diaphragm that reciprocates within a cylinder. It uses hydraulic oil to drive the diaphragm to deform, completely isolating the gas chamber from the oil chamber. This prevents hydrogen from contacting the oil during compression, ensuring gas purity. In hydrogen refueling stations, when the diaphragm compressor stops, a flow-limiting orifice plate is used to slowly release the compressor's exhaust pressure. Direct discharge would cause a sudden drop in the gas-side pressure of the compressor's diaphragm head, and the resulting higher oil pressure would force the diaphragm to violently impact the gas-displacement plate, causing deformation or even cracks. This would limit the diaphragm's lifespan to only a few hundred hours, far short of the standard design life of 3000 hours.

[0003] Furthermore, in actual hydrogen refueling station scenarios, hydrogen storage containers employ three-stage storage: high pressure, medium pressure, and low pressure. When a hydrogen storage container finishes storing hydrogen through a diaphragm compressor, it directly switches to a lower-pressure storage container for further storage. This causes a sudden drop in the compressor's exhaust pressure, and the diaphragm violently impacts the diaphragm head gas plate under the drive of high oil pressure on the oil side. In actual use, due to factors such as hydrogen intake from the refueling machine, the hydrogen storage container is frequently switched, and the above impact process is frequently repeated, ultimately leading to premature failure of the diaphragm compressor diaphragm. Diaphragm compressor diaphragms are expensive and difficult to disassemble and assemble, and maintenance work will also interrupt the normal operation of the hydrogen refueling station, increasing the operating costs of the hydrogen refueling station.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this disclosure provides a hydrogen storage control pipeline for a diaphragm compressor at a hydrogen refueling station, which aims to solve the technical problem of premature diaphragm failure caused by violent impact of the diaphragm against the gas plate during diaphragm compressor shutdown or hydrogen storage operation.

[0006] According to one aspect of this disclosure, a hydrogen storage control pipeline for a diaphragm compressor at a hydrogen refueling station is provided, comprising an exhaust pipe connected to the exhaust end of the diaphragm compressor, a high-pressure hydrogen storage branch, a medium-pressure hydrogen storage branch, and a low-pressure hydrogen storage branch, one end of which is connected to the outlet of the exhaust pipe and the other end of which is respectively connected to a high-pressure hydrogen storage cylinder group, a medium-pressure hydrogen storage cylinder group, or a low-pressure hydrogen storage cylinder group, a controller, and a pressure regulating valve group communicatively connected to the controller and correspondingly connected to the exhaust end of the diaphragm compressor for gradually reducing the exhaust pressure at the exhaust end of the diaphragm compressor by gradually adjusting the opening degree; an exhaust pressure transmitter communicatively connected to the controller is provided in the exhaust pipe, and a switchable gas control valve, a check valve, and a hydrogen storage branch pressure transmitter communicatively connected to the controller are respectively connected in series in each hydrogen storage branch.

[0007] In some embodiments of this disclosure, the pressure regulating valve group includes pressure regulating valves respectively connected in series to the high-pressure hydrogen storage branch, the medium-pressure hydrogen storage branch and the low-pressure hydrogen storage branch.

[0008] In some embodiments of this disclosure, the pressure regulating valve group includes a pressure regulating main line connected to the exhaust end of the diaphragm compressor and connected in series with a main line pressure regulating valve, a pressure regulating branch line connected in parallel at the outlet of the pressure regulating main line and respectively connected to the downstream position of the corresponding switch gas control valve in each hydrogen storage branch line, and a pressure regulating gas control valve respectively connected in series in each pressure regulating branch line.

[0009] In some embodiments of this disclosure, the pressure regulating valve assembly includes a hydrogen buffer tank connected in parallel between the inlet and outlet ends of the diaphragm compressor, a pressure regulating valve, an inlet control valve, and an inlet check valve connected in series in the pipeline between the hydrogen buffer tank and the outlet end of the diaphragm compressor, and a manual pressure regulating valve, an outlet control valve, and an outlet check valve connected in series in the pipeline between the hydrogen buffer tank and the inlet end of the diaphragm compressor.

[0010] In some embodiments of this disclosure, the hydrogen storage control pipeline of the diaphragm compressor at the hydrogen refueling station also includes an instrument air duct that drives each valve body in the pressure regulating valve group and the on / off gas control valve respectively; a filter pressure reducing valve is connected in series upstream of the instrument air duct.

[0011] In some embodiments of this disclosure, the instrument air duct indirectly controls the on / off state of each of the switch-operated pneumatic valves via a solenoid valve.

[0012] One or more technical solutions provided in this application embodiment have at least the following technical effects or advantages: By setting a pressure regulating valve at the exhaust end of the diaphragm compressor and utilizing the delayed closing of the switch gas control valve in the current hydrogen storage branch, the pressure at the exhaust end of the diaphragm compressor can be maintained and buffered based on the current pressure of the hydrogen storage cylinder group during tank switching operations. Furthermore, by gradually opening the pressure regulating valve, the pressure at the exhaust end of the diaphragm compressor can be matched with the pressure of the hydrogen storage cylinder group after tank switching, thereby achieving a smooth transition of the exhaust end pressure of the diaphragm compressor. This avoids the problem of the existing diaphragm compressor experiencing premature failure due to the diaphragm violently impacting the gas plate caused by a sudden drop in exhaust end pressure. Moreover, only a pressure regulating valve group needs to be added to the sequence control panel, resulting in low pipeline cost. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the hydrogen storage control pipeline of the diaphragm compressor in a hydrogen refueling station according to one embodiment of this application.

[0014] Figure 2 This is a schematic diagram of the hydrogen storage control pipeline of the diaphragm compressor at a hydrogen refueling station, as shown in another embodiment of this application.

[0015] Figure 3 This is a schematic diagram of the hydrogen storage control pipeline of the diaphragm compressor at a hydrogen refueling station in another embodiment of this application.

[0016] In the above diagrams, 1 represents the exhaust pipe, 11 represents the exhaust pressure transmitter, 2 represents the high-pressure hydrogen storage branch, 21 represents the high-pressure hydrogen storage branch on / off control valve, 22 represents the high-pressure hydrogen storage branch check valve, 23 represents the high-pressure hydrogen storage branch pressure regulating valve, 24 represents the high-pressure hydrogen storage branch pressure transmitter, 3 represents the medium-pressure hydrogen storage branch, 31 represents the medium-pressure hydrogen storage branch on / off control valve, 32 represents the medium-pressure hydrogen storage branch check valve, 33 represents the medium-pressure hydrogen storage branch pressure regulating valve, 34 represents the medium-pressure hydrogen storage branch pressure transmitter, 4 represents the low-pressure hydrogen storage branch, 41 represents the low-pressure hydrogen storage branch on / off control valve, 42 represents the low-pressure hydrogen storage branch check valve, 43 represents the low-pressure hydrogen storage branch pressure transmitter, 44 represents the low-pressure hydrogen storage branch pressure transmitter, 45 represents the low-pressure hydrogen storage branch pressure transmitter, 46 represents the low-pressure hydrogen storage branch pressure transmitter, 47 represents the low-pressure hydrogen storage branch pressure transmitter, 48 represents the low-pressure hydrogen storage branch pressure transmitter, 49 represents the low-pressure hydrogen storage branch pressure transmitter, 40 represents the low-pressure hydrogen storage branch pressure transmitter, 41 represents the low-pressure hydrogen storage branch on / off control valve, 42 represents the low-pressure hydrogen storage branch check valve ...9 represents the low-pressure hydrogen storage branch pressure transmitter, 40 represents the low-pressure hydrogen storage branch pressure transmitter, 49 represents the low-pressure hydrogen storage branch pressure transmitter, 49 represents the low-pressure hydrogen storage branch pressure transmitter, 49 represents the low-pressure hydrogen storage branch pressure transmitter, 49 represents the 44 is the low-pressure hydrogen storage branch pressure regulating valve, 5 is the low-pressure hydrogen storage branch pressure transmitter, 5 is the instrument air duct, 51 is the filter pressure reducing valve, 6 is the solenoid valve, 7 is the main pressure regulating line, 71 is the main line pressure regulating valve, 72 is the high-pressure regulating branch, 73 is the medium-pressure regulating branch, 74 is the low-pressure regulating branch, 75 is the high-pressure regulating branch switch pneumatic control valve, 76 is the medium-pressure regulating branch switch pneumatic control valve, 77 is the low-pressure regulating branch switch pneumatic control valve, 81 is the inlet pressure regulating valve, 82 is the inlet pneumatic control valve, 83 is the inlet check valve, 84 is the manual pressure regulating valve, 85 is the exhaust pneumatic control valve, and 86 is the exhaust check valve. Detailed Implementation

[0017] The programs involved or relied upon in the following embodiments are all conventional or simple programs in this technical field, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios. Unless otherwise specified, the devices involved in the following embodiments are all conventional commercially available products.

[0018] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] To address the technical problem of premature diaphragm failure caused by violent impact of the diaphragm against the gas plate during diaphragm compressor shutdown or hydrogen storage operations, this example discloses a hydrogen storage control pipeline for a diaphragm compressor at a hydrogen refueling station. (See [link to relevant documentation]). Figure 1 In this embodiment, the hydrogen storage control pipeline of the diaphragm compressor at the hydrogen refueling station includes an exhaust pipe 1 connected to the exhaust end of the diaphragm compressor. At the outlet of the exhaust pipe 1, there are parallel high-pressure hydrogen storage branch 2, medium-pressure hydrogen storage branch 3, and low-pressure hydrogen storage branch 4. The other end of the high-pressure hydrogen storage branch 2 is connected to a high-pressure hydrogen storage cylinder group, the other end of the medium-pressure hydrogen storage branch 3 is connected to a medium-pressure hydrogen storage cylinder group, and the other end of the low-pressure hydrogen storage branch 4 is connected to a low-pressure hydrogen storage cylinder group, thereby forming a three-stage hydrogen storage system of high, medium, and low pressure. This allows hydrogen to be stored at different pressure levels after being compressed by the diaphragm compressor, so that hydrogen can be efficiently drawn and refueled through a sequential control panel during actual use.

[0020] However, during hydrogen storage, when one hydrogen storage cylinder group reaches the set pressure, it needs to be switched to another hydrogen storage cylinder group for filling. During this switching process, the pressure at the discharge end of the diaphragm compressor changes abruptly and cannot match the high pressure on the oil side of the diaphragm compressor, causing the diaphragm to violently impact the gas plate. This impact problem also exists when the diaphragm compressor stops. To address this, in this embodiment, the inventors propose a pressure regulating valve group connected to the discharge end of the diaphragm compressor. Based on the inventive concept of gradually reducing the discharge pressure at the discharge end of the diaphragm compressor by progressively adjusting the opening of its internal pressure regulating valve, the problem of premature diaphragm failure caused by violent impact of the diaphragm impacting the gas plate is solved. Specifically, to control the operation of the pressure regulating valve group, this example includes a controller communicatively connected to the pressure regulating valve group. The controller issues opening adjustment commands for the pressure regulating valves, thereby achieving a gradual and orderly pressure drop at the discharge end of the diaphragm compressor.

[0021] Additionally, see Figure 1In this embodiment, a high-pressure hydrogen storage branch switch control valve 21 and a high-pressure hydrogen storage branch check valve 22 are connected in series in the high-pressure hydrogen storage branch 2. The high-pressure hydrogen storage branch switch control valve 21 controls the on / off state of its high-pressure hydrogen storage branch, and the high-pressure hydrogen storage branch check valve 22 ensures unidirectional flow of hydrogen in the branch, preventing backflow. Similarly, in this example, a medium-pressure hydrogen storage branch switch control valve 31 for controlling the on / off state of the branch and a medium-pressure hydrogen storage branch check valve 32 for ensuring unidirectional flow of hydrogen in the branch are connected in series in the medium-pressure hydrogen storage branch 3. A low-pressure hydrogen storage branch switch control valve 41 for controlling the on / off state of the branch and a low-pressure hydrogen storage branch check valve 42 for ensuring unidirectional flow of hydrogen in the branch are connected in series in the low-pressure hydrogen storage branch 4. In order to effectively and reliably control the on / off state of the switch control valve 21, in this embodiment, see... Figure 1 The diaphragm compressor hydrogen storage control pipeline also includes an instrument air duct 5. This instrument air duct is connected to corresponding on / off control valves in each hydrogen storage branch via solenoid valves 6 electrically connected to the controller. Thus, the controller indirectly controls the on / off state of the on / off control valves 31 by controlling the conduction of each solenoid valve 6. Additionally, in this example, a filter pressure reducing valve 51 is connected upstream of the instrument air duct 5. This valve reduces the pressure of the instrument air to 0.6 MPa to meet the operating requirements of the valves connected to the instrument air duct.

[0022] To achieve a gradual and orderly decrease in the pressure at the discharge end of the diaphragm compressor during tank switching or shutdown based on the pressure regulating valve group, in this embodiment, the pressure regulating valve group includes a high-pressure hydrogen storage branch pressure regulating valve 23 connected in series to the high-pressure hydrogen storage branch 2, a medium-pressure hydrogen storage branch pressure regulating valve 33 connected in series to the medium-pressure hydrogen storage branch 3, and a low-pressure hydrogen storage branch pressure regulating valve 43 connected in series to the low-pressure hydrogen storage branch 4. Each pressure regulating valve is connected to the instrument air duct 5, using the instrument air as the power source for valve body operation. Each pressure regulating valve is also connected to the controller, which controls the opening degree of each pressure regulating valve, thereby adjusting the degree of conductivity between the discharge end of the diaphragm compressor and each hydrogen storage cylinder group, so that the pressure at the discharge end of the diaphragm compressor gradually decreases. In this embodiment, controlling the opening of the pressure regulating valve via the controller requires pressure fluctuations in the pipeline. Therefore, an exhaust pressure transmitter 11, which is communicatively connected to the controller, is installed at the exhaust pipe 1 to monitor the pressure value at the exhaust end of the diaphragm compressor in real time. Additionally, a high-pressure hydrogen storage branch pressure transmitter 24 is installed downstream of the high-pressure hydrogen storage branch 2, a medium-pressure hydrogen storage branch pressure transmitter 34 is installed downstream of the medium-pressure hydrogen storage branch 3, and a low-pressure hydrogen storage branch pressure transmitter 44 is installed downstream of the low-pressure hydrogen storage branch 4. Each hydrogen storage branch pressure transmitter detects the hydrogen storage pressure of the corresponding pressure hydrogen storage cylinder group. Therefore, by controlling the connection of the corresponding hydrogen storage branch to carry out hydrogen storage operations for the corresponding level of hydrogen storage cylinder group, when switching from the current tank to the next tank, the controller controls the delayed closure of the hydrogen storage branch corresponding to the current tank, and sets the opening of the on / off gas control valve and the gradual opening of the pressure regulating valve in the hydrogen storage branch corresponding to the next tank. In this way, the pressure at the discharge end of the diaphragm compressor is maintained and buffered by the current tank (that is, by using the delayed closure of the hydrogen storage branch corresponding to the current tank, some of the hydrogen pumped out by the diaphragm compressor during the switching process can enter the current tank), avoiding the diaphragm shock caused by the sudden drop in pressure at the discharge end of the diaphragm compressor due to a direct switch to another tank; at the same time, based on the gradual opening of the pressure regulating valve in the hydrogen storage branch corresponding to the next tank, the pressure at the discharge end of the diaphragm compressor is gradually reduced to match the pressure of the next tank (that is, the remaining part of the hydrogen pumped out by the diaphragm compressor during the switching process enters the next tank through the gradually opening pressure regulating valve), thereby achieving a smooth transition and connection of the pressure at the discharge end of the diaphragm compressor. Similarly, during shutdown, the pressure at the discharge end of the diaphragm compressor is gradually reduced via pressure regulating valves, thereby preventing the diaphragm from violently impacting the gas plate due to a sudden drop in discharge pressure. Specifically, the conventional control procedure involves gradually opening each pressure regulating valve via the controller, which will not be elaborated upon in this example.

[0023] To achieve a gradual and orderly decrease in the diaphragm compressor discharge pressure during tank shut-off or shutdown based on the pressure regulating valve assembly, in some other embodiments, see [link to other embodiments]. Figure 2The pressure regulating valve assembly includes a main pressure regulating line 7 connected to the exhaust end of the diaphragm compressor, and a main pressure regulating valve 71 connected in series with the instrument air duct in the main pressure regulating line 7. The main pressure regulating valve 71 is communicatively connected to the controller, thereby allowing its conduction level to be controlled by the controller. Downstream of the main pressure regulating line 7, there are parallel connections to a high-pressure regulating branch 72, a medium-pressure regulating branch 73, and a low-pressure regulating branch 74, which are respectively connected to the high-pressure hydrogen storage branch 2, the medium-pressure hydrogen storage branch 3, and the low-pressure hydrogen storage branch 4. Specifically, in this embodiment, the high-pressure regulating branch 72, the medium-pressure regulating branch 73, and the low-pressure regulating branch 74 are respectively connected to the downstream position of the corresponding on / off gas control valve of the corresponding hydrogen storage branch. In addition, in this embodiment, a high-pressure regulating branch switch pneumatic valve 75 is connected in series in the high-pressure regulating branch 72. Similarly, a medium-pressure regulating branch switch pneumatic valve 76 is connected in series in the medium-pressure regulating branch 73, and a low-pressure regulating branch switch pneumatic valve 77 is connected in series in the low-pressure regulating branch 74. Each pressure regulating branch switch pneumatic valve is controlled by a solenoid valve 6 that is connected to the instrument air duct and communicates with the controller, thereby responding to the switch control command issued by the controller. Therefore, by controlling the activation of the corresponding hydrogen storage branch, hydrogen storage operations of the corresponding level of hydrogen storage cylinder group are carried out. When switching from the current tank to the next tank, the controller controls the hydrogen storage branch corresponding to the current tank to close after a delay, sets the on / off pneumatic control valve in the hydrogen storage branch corresponding to the next tank to open, and regulates the main pressure regulating valve 71 to open gradually, while controlling the activation of the on / off pneumatic control valve in the pressure regulating branch connected to the hydrogen storage branch of the next tank. This utilizes the current tank to maintain and buffer the pressure at the diaphragm compressor exhaust end, avoiding diaphragm shock caused by a sudden drop in pressure at the diaphragm compressor exhaust end due to a direct switch to another tank. At the same time, by gradually opening the main pressure regulating valve 71 in the main pressure regulating line 7, based on the activation of the pressure regulating branch corresponding to the next tank, the pressure at the diaphragm compressor exhaust end is gradually reduced to match the pressure of the next tank, thereby achieving a smooth transition and connection of the diaphragm compressor exhaust end pressure. Specifically, the controller controls the gradual opening of the pressure regulating valve as a conventional control procedure, which will not be elaborated in this example.

[0024] To achieve a gradual and orderly decrease in the diaphragm compressor discharge pressure during tank shut-off or shutdown based on the pressure regulating valve assembly, in some other embodiments, see [link to other embodiments]. Figure 3The pressure regulating valve group includes a hydrogen buffer tank connected in parallel between the inlet and outlet ends of the diaphragm compressor. An inlet pressure regulating valve 81, which is connected in series with the controller, an inlet air control valve 82, which is connected in series with the instrument air duct and controlled by a solenoid valve, and an inlet check valve 83 are connected in series in the pipeline between the outlet end of the diaphragm compressor and the hydrogen buffer tank. A manual pressure regulating valve 84, an exhaust air control valve 85, which is connected in series with the instrument air duct and controlled by a solenoid valve, and an exhaust check valve 86 are also connected in series in the pipeline between the inlet end of the diaphragm compressor and the hydrogen buffer tank. Therefore, by controlling the connection of the corresponding hydrogen storage branch, hydrogen storage operations of the corresponding level of hydrogen storage cylinder group are carried out. When switching from the current tank to the next tank, the controller controls the hydrogen storage branch corresponding to the current tank to close after a delay, and controls the inlet pressure regulating valve 81 to open gradually, and controls the inlet gas control valve 82 to open. This allows the exhaust pressure of the diaphragm compressor to enter the hydrogen buffer tank after passing through the inlet pressure regulating valve 81, the inlet gas control valve 82 and the inlet one-way valve 83. This uses the current tank to maintain and buffer the exhaust pressure of the diaphragm compressor, avoiding the diaphragm impact caused by the sudden drop in exhaust pressure of the diaphragm compressor when switching directly to another tank. At the same time, based on the gradual opening of the inlet pressure regulating valve 81, the exhaust pressure of the diaphragm compressor is gradually reduced. When the exhaust pressure of the diaphragm compressor drops to a level that matches the pressure of the next tank, the hydrogen storage branch of the next tank is connected, thereby achieving a smooth transition and connection of the exhaust pressure of the diaphragm compressor. In this example, when connecting the hydrogen storage branch to the next tank, the high-pressure hydrogen in the hydrogen buffer tank is reduced to 20 MPa via a manual pressure regulating valve, and the exhaust control valve 85 is opened. This allows the reduced-pressure hydrogen to enter the inlet of the diaphragm compressor via the exhaust check valve 86, enabling the hydrogen in the hydrogen buffer tank to be utilized. When the hydrogen pressure in the buffer tank drops below 20 MPa, the exhaust control valve 85 is closed to ensure the buffer tank's normal operation during the next tank switching. Specifically, the controller gradually opens each pressure regulating valve as part of the standard control procedure, which will not be elaborated upon in this example.

[0025] Although some preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0026] Obviously, those skilled in the art can make modifications and variations to this application without departing from the spirit and scope of the invention. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A hydrogen storage control pipeline for a diaphragm compressor at a hydrogen refueling station, characterized in that, The system includes an exhaust pipe connected to the exhaust end of a diaphragm compressor; a high-pressure hydrogen storage branch, a medium-pressure hydrogen storage branch, and a low-pressure hydrogen storage branch, one end of which is connected to the outlet of the exhaust pipe and the other end of which is respectively connected to a high-pressure hydrogen storage cylinder group, a medium-pressure hydrogen storage cylinder group, or a low-pressure hydrogen storage cylinder group; a controller; and a pressure regulating valve group that is communicatively connected to the controller and correspondingly connected to the exhaust end of the diaphragm compressor for gradually reducing the exhaust pressure at the exhaust end of the diaphragm compressor by gradually adjusting the opening degree; the exhaust pipe is equipped with an exhaust pressure transmitter that is communicatively connected to the controller; and each hydrogen storage branch is respectively equipped with a switchable gas control valve, a check valve, and a hydrogen storage branch pressure transmitter that is communicatively connected to the controller.

2. The hydrogen storage control pipeline for the diaphragm compressor at a hydrogen refueling station according to claim 1, characterized in that, The pressure regulating valve group includes pressure regulating valves that are respectively connected in series to the high-pressure hydrogen storage branch, the medium-pressure hydrogen storage branch, and the low-pressure hydrogen storage branch.

3. The hydrogen storage control pipeline for the diaphragm compressor at a hydrogen refueling station according to claim 1, characterized in that, The pressure regulating valve group includes a pressure regulating main line connected to the exhaust end of the diaphragm compressor and connected in series with a main line pressure regulating valve, a pressure regulating branch line connected in parallel at the outlet of the pressure regulating main line and respectively connected to the downstream position of the corresponding switch gas control valve in each hydrogen storage branch line, and a pressure regulating gas control valve respectively connected in series in each pressure regulating branch line.

4. The hydrogen storage control pipeline for the diaphragm compressor at a hydrogen refueling station according to claim 1, characterized in that, The pressure regulating valve group includes a hydrogen buffer tank connected in parallel between the inlet and outlet ends of the diaphragm compressor, a pressure regulating valve, an inlet air control valve, and an inlet check valve connected in series in the pipeline between the hydrogen buffer tank and the outlet end of the diaphragm compressor, and a manual pressure regulating valve, an outlet air control valve, and an outlet check valve connected in series in the pipeline between the hydrogen buffer tank and the inlet end of the diaphragm compressor.

5. The hydrogen storage control pipeline for the diaphragm compressor at a hydrogen refueling station according to any one of claims 1 to 4, characterized in that, It also includes instrument air ducts that drive each valve body in the pressure regulating valve group and the on / off pneumatic control valve respectively; a filter pressure reducing valve is connected in series upstream of the instrument air duct.

6. The hydrogen storage control pipeline for the diaphragm compressor at a hydrogen refueling station according to claim 5, characterized in that, The instrument air duct indirectly controls the on / off state of each of the switch-operated air control valves via solenoid valves.

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