Graded pressurization storage and supply device

Abstract

The utility model relates to the technical field of gas storage and transportation, in particular to a graded pressurization storage and supply device. The graded pressurization storage and supply device comprises a buffer assembly, a pressurization assembly, a transfer assembly and a gas storage assembly. The buffer assembly comprises a plurality of buffer gas cylinders, and gas is buffered to a certain pressure after entering the buffer gas cylinders; the pressurizing assembly comprises a pressurizing pump connected with the buffer gas cylinder, a pressurizing inlet and a pressurizing outlet; the transfer assembly comprises a transfer gas cylinder which is communicated with the pressurizing assembly and the buffering assembly through pipelines; the gas storage assembly comprises a plurality of high-pressure gas cylinders which are communicated with the pressurizing assembly and the transfer gas cylinder through pipelines; the booster pump is controlled by different valves and pipelines to pressurize gas in the transfer gas cylinder and the high-pressure gas cylinder in sequence. According to the graded pressurization storage and supply device, the single-time compression ratio is reduced, the energy utilization rate is increased, the device size is reduced, and the requirement for portability and movement is met.

Description

Technical Field

[0001] This application relates to the field of gas storage and transportation technology, and in particular to a staged pressurization storage and supply device. Background Technology

[0002] High-pressure gaseous storage and transportation technology is currently the most common and direct method for hydrogen storage and transportation in industry. It utilizes mature compression technology to compress hydrogen to a high-pressure state and store it in high-pressure containers, such as steel cylinders or hydrogen storage tanks in long-tube trailers. Due to its mature technology, low operating costs, high flexibility, and rapid response, high-pressure gaseous storage and transportation technology plays a crucial role in the current hydrogen supply chain, and is particularly suitable for small-scale and flexible distribution needs.

[0003] A hydrogen compressor is a mechanical device specifically designed to increase the pressure of hydrogen gas. Its working principle is to use mechanical force to compress hydrogen from a low-pressure state to a high-pressure state. A compressor typically consists of a compression chamber, an inlet valve, an outlet valve, and a compressor drive unit. When the inlet valve opens, hydrogen gas enters the compression chamber through the suction pipe. Then, the compressor drive unit begins to operate, driving the compressor to achieve mechanical compression. As the drive unit operates, the volume of the compression chamber gradually decreases, and the hydrogen gas is gradually compressed. When the hydrogen gas is compressed to a certain pressure, the inlet valve closes to prevent backflow. Simultaneously, the outlet valve opens, pushing the compressed hydrogen gas into a hydrogen storage container or delivery pipeline.

[0004] Existing hydrogen compression devices use a single pressurization stage, resulting in a high compression ratio, high heat dissipation, reduced compression efficiency, and inability to operate for extended periods. Furthermore, they are large and heavy, making them unsuitable for portable applications. Utility Model Content

[0005] The purpose of this application is to provide a staged pressurization and storage device that adopts a multi-stage pressurization mode and improves the pressurization device to reduce the single compression ratio, improve energy utilization, reduce size, and meet the portability requirements.

[0006] To address the aforementioned technical problems, embodiments of this application provide a staged pressurization and storage device, which includes a buffer assembly, a pressurization assembly, a transfer assembly, and a gas storage assembly. The buffer assembly includes multiple buffer gas cylinders, into which gas is buffered to a certain pressure. The pressurization assembly includes a pressurization pump connected to the buffer gas cylinders, a pressurization inlet, and a pressurization outlet. The transfer assembly includes transfer gas cylinders interconnected with the pressurization assembly and the buffer assembly via pipelines. The gas storage assembly includes multiple high-pressure gas cylinders connected to the pressurization assembly and the transfer gas cylinders via pipelines. Under the control of different valves and pipelines, the pressurization pump sequentially pressurizes the gas in the transfer gas cylinders and the high-pressure gas cylinders.

[0007] The staged pressurization and storage device provided in this application connects a booster pump to a buffer assembly and a gas storage assembly in sequence, and pressurizes the gas in the transfer cylinder twice, finally pumping the gas to a high-pressure cylinder at a preset pressure. This multi-stage pressurization storage device reduces the single compression ratio, improves energy utilization, reduces device size, and meets the needs of portable mobility.

[0008] In some embodiments, a first solenoid valve is provided on the communication path between the booster inlet and the buffer assembly, a second solenoid valve is provided on the communication path between the booster outlet and the gas storage assembly, a third solenoid valve is provided on the communication path between the booster inlet and the transfer assembly, and a fourth solenoid valve is provided on the communication path between the booster outlet and the transfer assembly.

[0009] In some embodiments, the booster pump includes a motor, the output shaft of which is connected to a reducer, the reducer is connected to a crankshaft, and the crankshaft is connected to a piston.

[0010] In some embodiments, the booster assembly also includes a first mounting bracket on which the booster pump is fixed, and a fan is provided on one side of the first mounting bracket to blow air toward the piston.

[0011] In some embodiments, the pressurization assembly further includes a vent, which is connected to the pressurization outlet. A first safety valve is provided in the connection path between the pressurization outlet and the vent. The opening pressure of the first safety valve is 39 MPa, and the reseating pressure is 37 MPa.

[0012] In some embodiments, a second mounting bracket is also included, which is detachably connected to a third mounting bracket. The buffer assembly, the pressurization assembly, and the transfer assembly are respectively installed in different areas of the second mounting bracket, and the gas storage assembly is installed in the third mounting bracket.

[0013] In some embodiments, the gas storage assembly also includes a manifold connected to the transfer gas cylinders, with each high-pressure gas cylinder connected to the manifold via an independent pipe, the manifold being fixed within a third mounting bracket.

[0014] In some embodiments, a gas supply assembly connected to the manifold is also included. The gas supply assembly includes a gas transmission pipeline connected to the outlet of the gas storage assembly, and a pressure reducing valve is provided on the gas flow path of the gas transmission pipeline.

[0015] In some embodiments, a second safety valve is installed at the inlet of the storage and supply device and at the outlet of the gas supply component, respectively. The opening pressure of the second safety valve is 3.5 MPa and the reseating pressure is 3.2 MPa.

[0016] In some implementations, a low-pressure sensor is also installed at the inlet of the storage and supply device, and a high-pressure sensor is also installed at the pressurization outlet.

[0017] In some implementations, the design working pressure of the gas in the buffer cylinder is 3 MPa, the design working pressure of the gas in the transfer cylinder is 12 MPa, and the design working pressure of the gas in the high-pressure cylinder is 35 MPa. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a staged pressurization and storage device provided in some embodiments of this application;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the booster component of the staged booster storage and supply device provided in some embodiments of this application;

[0021] Figure 3 This is a three-dimensional structural schematic diagram of the gas storage component of the staged pressurization storage and supply device provided in some embodiments of this application;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the transfer component of the graded pressurization storage and supply device provided in some embodiments of this application;

[0023] Figure 5 This is a schematic diagram of the first-stage boosting principle of a staged boosting storage and supply device provided in some embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the two-stage boosting principle of a boosting storage and supply device provided in some embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the control valve connection of the booster component in a graded booster storage and supply device provided in some embodiments of this application.

[0026] Explanation of reference numerals in the attached drawings: 11-Buffer assembly; 111-Buffer gas cylinder; 12-Pressure booster assembly; 121-Pressure booster pump; 1211-Motor; 1212-Reducer; 1213-Crankshaft; 1214-Piston; 122-Pressure booster inlet; 123-Pressure booster outlet; 124-First mounting bracket; 125-Fan; 126-Relief port; 127-First safety valve; 1281-First solenoid valve; 1282-Second solenoid valve; 1283-Third solenoid valve; 1284-Fourth solenoid valve; 129-Fifth solenoid valve; 13-Transfer assembly; 131-Transfer gas cylinder; 14-Gas storage assembly; 141-High-pressure gas cylinder; 142-Manifold; 15-Gas supply assembly; 151-Pressure reducing valve; 16-Second mounting bracket; 17-Third mounting bracket; 18-Second safety valve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0031] High-pressure gaseous storage and transportation technology is currently the most common and direct method for hydrogen storage and transportation in industry. It utilizes mature compression technology to compress hydrogen to a high-pressure state and store it in high-pressure containers, such as steel cylinders or hydrogen storage tanks in long-tube trailers. Due to its mature technology, low operating costs, high flexibility, and rapid response, high-pressure gaseous storage and transportation technology plays a crucial role in the current hydrogen supply chain, and is particularly suitable for small-scale and flexible distribution needs.

[0032] A hydrogen compressor is a mechanical device specifically designed to increase the pressure of hydrogen gas. Its working principle is to use mechanical force to compress hydrogen from a low-pressure state to a high-pressure state. A compressor typically consists of a compression chamber, an inlet valve, an outlet valve, and a compressor drive unit. When the inlet valve opens, hydrogen gas enters the compression chamber through the suction pipe. Then, the compressor drive unit begins to operate, driving the compressor to achieve mechanical compression. As the drive unit operates, the volume of the compression chamber gradually decreases, and the hydrogen gas is gradually compressed. When the hydrogen gas is compressed to a certain pressure, the inlet valve closes to prevent backflow. Simultaneously, the outlet valve opens, pushing the compressed hydrogen gas into a hydrogen storage container or delivery pipeline.

[0033] Existing hydrogen compression devices use a single pressurization stage, resulting in a high compression ratio, high heat dissipation, reduced compression efficiency, and inability to operate for extended periods. Furthermore, they are large and heavy, making them unsuitable for portable applications.

[0034] Therefore, in order to reduce the compression ratio of hydrogen compression devices, decrease heat dissipation, improve working efficiency, reduce size, and meet portability requirements, some embodiments of this application provide a staged pressurization and supply device. This device uses a booster pump connected sequentially to a buffer assembly and a gas storage assembly, pressurizing the gas in the transfer cylinder twice before finally pumping the gas to a high-pressure cylinder at a preset pressure. This multi-stage pressurization mode storage and supply device reduces the single compression ratio, improves energy utilization, reduces device size, and meets the needs of portable mobility.

[0035] The following is combined Figures 1 to 7 This application describes a staged pressurization and storage device provided in some embodiments.

[0036] like Figures 1 to 4 As shown in some embodiments of this application, a staged pressurization and storage device includes a buffer assembly 11, a pressurization assembly 12, a transfer assembly 13, and a gas storage assembly 14. The buffer assembly 11 includes multiple buffer gas cylinders 111, which buffer the gas to a certain pressure after it enters the buffer gas cylinders 111. The pressurization assembly 12 includes a pressurization pump 121 connected to the buffer gas cylinders 111, a pressurization inlet 122, and a pressurization outlet 123. The transfer assembly 13 includes a transfer gas cylinder 131 that is interconnected with the pressurization assembly 12 and the buffer assembly 11 through pipelines. The gas storage assembly 14 includes multiple high-pressure gas cylinders 141 that are interconnected with the pressurization assembly 12 and the transfer gas cylinders 131 through pipelines. Under the control of different valves and pipelines, the pressurization pump 121 pressurizes the gas in the transfer gas cylinders 131 and the high-pressure gas cylinders 141 sequentially. The booster pump 121 is pressurized in two stages. First, it connects to the buffer assembly 11 and the transfer assembly 13 and pressurizes the gas initially during the process of transporting the gas from the buffer assembly 11 to the transfer assembly 13. Then, it connects to the transfer assembly 13 and the gas storage assembly 14 and pressurizes the gas again to the preset pressure during the process of transporting the gas from the transfer assembly 13 to the gas storage assembly 14.

[0037] It should be noted that the buffer assembly 11, in addition to the buffer gas cylinder 111, also includes inlet and outlet pipes and control valves connected to the buffer gas cylinder 111. Multiple buffer gas cylinders 111 are typically provided, and can be composed of three 50L capacity steel cylinder groups. One end of the buffer gas cylinder 111 is connected to the upstream gas source electrolysis water hydrogen production unit, and the other end is connected to the booster pump 121. The transfer assembly 13, in addition to the transfer gas cylinder 131, also includes inlet and outlet pipes and control valves connected to the transfer gas cylinder 131. The number and capacity of the transfer gas cylinder 131 are determined according to the gas production volume and the capacity of the buffer gas cylinder 111 group. It can be composed of a single 50L capacity steel cylinder. One end of the transfer gas cylinder 131 is connected to the booster pump 121, and the other end is connected to the high-pressure gas cylinder 141. In addition to high-pressure gas cylinders 141, the gas storage assembly 14 also includes inlet and outlet pipes connected to the high-pressure gas cylinders 141 and control valves. The number and capacity of the high-pressure gas cylinders 141 are determined according to the amount of gas to be stored. It can be composed of sixteen 50L capacity steel cylinders. One end of the high-pressure gas cylinder 141 group is connected to the booster pump 121, and the other end is connected to the downstream gas use equipment through the pressure reducing valve 151 to supply gas to it.

[0038] The pressurization inlet 122 and pressurization outlet 123 are equipped with switching valves and corresponding pipelines, which control the pressurization inlet 122 to first connect to the buffer gas cylinder 111 and then to the intermediate gas cylinder 131, and control the pressurization outlet 123 to first connect to the intermediate gas cylinder 131 and then to the high-pressure gas cylinder 141. Figure 5 The red section shows the connection route of the booster pump 121 during the first-stage pressurization. At this time, the booster inlet 122 is connected to the buffer gas cylinder 111, and the booster outlet 123 is connected to the transfer gas cylinder 131. The hydrogen pressure after electrolysis of water from the upstream gas source reaches a maximum of about 3 MPa. When the outlet of this device is closed, the pressure inside the device increases as the amount of hydrogen increases. When the pressure rises to about 2.8 MPa, it will roughly balance with the gas source pressure, and no more hydrogen can be injected. Subsequently, the booster assembly 12 is used to boost the pressure. When the hydrogen is buffered in the buffer gas cylinder 111 to about 2.8 MPa, the booster assembly 12 begins to pressurize, storing the hydrogen in the buffer gas cylinder 111 into the transfer gas cylinder 131. The maximum storage pressure of the transfer gas cylinder 131 is 12 MPa. Figure 6 The red section shows the connection route of the booster pump 121 during the secondary pressurization stage. At this time, the booster inlet 122 is connected to the transfer cylinder 131, and the booster outlet 123 is connected to the high-pressure cylinder 141. After the hydrogen is pressurized to the maximum working pressure in the transfer cylinder 131, the opening and closing of the switching valve in the control section initiates another pressurization process, boosting the gas in the transfer cylinder 131 to the required 35 MPa, and then entering the high-pressure cylinder 141 through a predetermined pipeline. The switching valve is controlled by the control system to ensure the continuous operation of the buffer assembly 11, the transfer assembly 13, and the gas storage assembly 14. Once the gas storage assembly 14 reaches the required gas quantity and pressure, the entire device stops operating.

[0039] In addition, to ensure gas purity, buffer cylinder 111, transfer cylinder 131, and high-pressure cylinder 141 need to be purged before use. This can be done by purging three times with 3MPa nitrogen and three times with 3MPa storage gas (such as hydrogen). After purging, when no longer in use, the inlet and outlet of the device should be sealed with plugs. A purging interface is provided at the inlet of the storage and supply device, and a manual shut-off valve is installed at the purging interface to facilitate gas purging and ensure the purity of the gas throughout the device.

[0040] The multi-stage pressurization storage and supply device provided in this application connects a booster pump 121 to a buffer assembly 11 and a gas storage assembly 14 in sequence, and pressurizes the gas in the transfer cylinder 131 twice, finally pumping the gas to the high-pressure cylinder 141 after reaching the preset pressure. This multi-stage pressurization storage and supply device reduces the single compression ratio, reduces heat dissipation, improves working efficiency, reduces device size, and meets the needs of portable mobility.

[0041] In some embodiments of this application, a first solenoid valve 1281 is provided on the communication path between the pressurization inlet 122 and the buffer component 11, a second solenoid valve 1282 is provided on the communication path between the pressurization outlet 123 and the gas storage component 14, a third solenoid valve 1283 is provided on the communication path between the pressurization inlet 122 and the transfer component 13, and a fourth solenoid valve 1284 is provided on the communication path between the pressurization outlet 123 and the transfer component 13.

[0042] like Figure 7 As shown, when booster pump 121 pressurizes transfer cylinder 131, the first solenoid valve 1281 and the fourth solenoid valve 1284 are open, while the second solenoid valve 1282 and the third solenoid valve 1283 are closed. One end of booster pump 121 is connected to buffer cylinder 111, and the other end is connected to transfer cylinder 131, completing the first-stage pressurization process. When booster pump 121 pressurizes high-pressure cylinder 141, the second solenoid valve 1282 and the third solenoid valve 1283 are open, while the first solenoid valve 1281 and the fourth solenoid valve 1284 are closed. One end of booster pump 121 is connected to transfer cylinder 131, and the other end is connected to high-pressure cylinder 141, completing the second-stage pressurization process.

[0043] In some embodiments of this application, the booster pump 121 includes a motor 1211, the output shaft of the motor 1211 is connected to a reducer 1212, the reducer 1212 is connected to a crankshaft 1213, and the crankshaft 1213 is connected to a piston 1214.

[0044] It should be noted that the motor 1211 drives the crankshaft 1213 to rotate, and the crankshaft 1213 drives the piston 1214 to move back and forth, compressing the gas in the chamber of the booster pump 121. The speed of the motor 1211 is adjusted by the reducer 1212 to compress the gas at a suitable speed.

[0045] In some embodiments of this application, the booster assembly 12 further includes a first mounting bracket 124, the booster pump 121 is fixed on the first mounting bracket 124, and a fan 125 is also provided on one side of the first mounting bracket 124, the fan 125 blowing towards the piston 1214.

[0046] It should be noted that the booster assembly 12 is mounted entirely on the first mounting bracket 124, making it modular and convenient for maintenance and repair. Through a reasonable layout, the structure is compact and the overall size is small, with the booster assembly 12 measuring 625mm*875mm*325mm. A fan 125 is provided to blow heat towards the piston 1214, which can quickly dissipate the heat generated by the piston 1214 during operation, ensuring the heat dissipation effect of the booster assembly 12.

[0047] In some embodiments of this application, the pressurization assembly 12 further includes a vent 126, which is connected to the pressurization outlet 123. A first safety valve 127 is provided on the communication path between the pressurization outlet 123 and the vent 126. The opening pressure of the first safety valve 127 is 39 MPa, and the reseating pressure is 37 MPa.

[0048] It should be noted that the first safety valve 127 serves to protect the pressurization assembly 12 and is normally closed. When the outlet pressure of the pressurization assembly 12 reaches 39 MPa, the first safety valve 127 opens, and the overpressurized gas is discharged through the vent 126. When the pressure drops below 37 MPa, the first safety valve 127 closes again, and the pressurization assembly 12 continues to operate normally. The connection between the first safety valve 127 and the vent 126 enables emergency gas discharge in special circumstances. Two safety lines can be connected to the pressurization outlet 123: one line connects to the vent line via the first safety valve 127 for automatic overpressure discharge, and the other line connects to the vent line via a solenoid valve for manual control discharge. The two lines are connected in parallel and do not interfere with each other.

[0049] In some embodiments of this application, a second mounting bracket 16 is also included, and a third mounting bracket 17 is detachably connected to the second mounting bracket 16. The buffer assembly 11, the pressurization assembly 12, and the transfer assembly 13 are respectively installed in different areas of the second mounting bracket 16, and the gas storage assembly 14 is installed in the third mounting bracket 17.

[0050] It should be noted that the second mounting bracket 16 and the third mounting bracket 17 allow different components to be placed in different areas, enabling the entire device to be installed in a modular fashion. This facilitates maintenance and repair, and meets the requirements for portable skid-mounted installation. Through a reasonable layout, the structure is compact and the overall size is small, with the device measuring 2060mm*1030mm*1900mm.

[0051] In some embodiments of this application, the gas storage assembly 14 further includes a manifold 142, and each high-pressure gas cylinder 141 is connected to the manifold 142 through an independent pipe. The manifold 142 is fixed on the third mounting bracket 17.

[0052] It should be noted that the high-pressure gas cylinders 141 are connected to the manifold 142 via independent pipes, forming a parallel gas cylinder group to ensure that the gas pressure in each cylinder is equal. The manifold 142 is fixed inside the upper part of the third mounting bracket 17, with reserved inlets and outlets for gas exchange with the outside. Each inlet and outlet has a manual shut-off valve to manually control the gas flow of the high-pressure gas cylinder group 141.

[0053] In some embodiments of this application, a gas supply assembly 15 is also included, which includes a gas transmission pipeline connected to the outlet of the gas storage assembly 14, and a pressure reducing valve 151 is provided on the gas flow path of the gas transmission pipeline.

[0054] It should be noted that one end of the gas pipeline connects to the high-pressure gas cylinder group 141, and the other end connects to the downstream gas-using equipment. The pressure reducing valve 151 reduces the gas pressure in the high-pressure gas cylinder 141 to the required pressure before supplying the gas to the downstream equipment. The pressure reducing valve 151 has a control knob, which can be used to set the pressure according to the gas demand of the downstream equipment, and can reduce the pressure to 0-1 MPa. The gas supply assembly 15 mainly consists of the pressure reducing valve 151, a high-pressure solenoid valve, a low-pressure solenoid valve, a pressure sensor, a safety valve, and a manual shut-off valve. The pressure reducing valve 151 regulates the pressure of the gas in the high-pressure gas cylinder 141 of the gas storage assembly 14 before outputting it to the outside of the device; the opening and closing of the solenoid valve controls the on / off of the gas supply assembly 15; the safety valve connects the gas supply assembly 15 to the venting pipeline, enabling emergency venting in critical situations; and the pressure sensor displays the outlet pressure of the gas supply assembly 15 in real time.

[0055] In some embodiments of this application, a second safety valve 18 is installed at the inlet of the storage and supply device and at the outlet of the gas supply component 15, respectively. The opening pressure of the second safety valve 18 is 3.5 MPa and the reseating pressure is 3.2 MPa.

[0056] It should be noted that the buffer cylinder 111 is designed to operate at a pressure of 3 MPa. The inlet pressure of the device should not be too high, as excessive pressure may damage certain components at the inlet. The outlet pressure of the gas supply assembly 15 should also not be too high to avoid damaging downstream equipment. Second safety valves 18 are installed at the inlet of the storage and supply device and the outlet of the gas supply assembly 15 to protect downstream connected equipment. The cylinder's designed operating pressure is lower than the burst pressure (maximum permissible pressure), generally with a safety factor of 3.0. The designed operating pressure is 3 MPa, and the burst pressure is generally 9 MPa. The outlet pressure of the gas supply assembly 15 is controlled by the pressure reducing valve 151 control knob on the panel, with a control range of 0-1 MPa, adjustable according to actual needs. Pressure reducing valves 151 with different pressure ranges can also be replaced to meet more operating conditions.

[0057] In some embodiments of this application, a low-pressure sensor is also provided at the inlet of the storage and supply device, and a high-pressure sensor is also provided at the booster outlet 123.

[0058] It should be noted that the low-pressure sensor is used to monitor the pressure at the inlet of the device, while the high-pressure sensor is used to monitor the pressure at the booster outlet 123, so as to understand the pressure situation at various points of the equipment at any time. In addition, a high-pressure gauge and a high-pressure sensor can be installed in the transfer component 13 to monitor the gas status inside the transfer cylinder 131 in real time; a high-pressure gauge and a high-pressure sensor can be installed at the outlet of the booster component 12 to monitor the working status of the booster component 12 in real time; and a high-pressure gauge and a high-pressure sensor can be installed between the inlet pipe of the gas storage component 14 and the outlet pipe of the booster component 12 to monitor the gas status inside the gas cylinder of the gas storage component 14 in real time. The pressure gauge can mechanically display the pressure without an external power supply. For ease of display and operation, the pressure gauge is concentrated on the panel, which requires additional piping and is less convenient. The pressure sensor signal receiver can be placed at the measured position, and the display end is concentrated on the panel. The signal receiver and display end are connected by a signal line, eliminating the need for piping like the pressure gauge, making it more convenient and flexible. However, the pressure sensor requires an external power supply to display properly. Considering the advantages and disadvantages mentioned above, pressure sensors are generally used in general locations, while a combination of both is used in certain critical locations.

[0059] In some embodiments of this application, the gas in the buffer cylinder 111 is designed to operate at a working pressure of 3 MPa, the gas in the transfer cylinder 131 is designed to operate at a working pressure of 12 MPa, and the gas in the high-pressure cylinder 141 is designed to operate at a working pressure of 35 MPa.

[0060] It should be noted that the gas pressure range in buffer cylinder 111 is 2.8-3 MPa, the maximum working pressure in transfer cylinder 131 is 12 MPa, and the maximum working pressure in high-pressure cylinder 141 is 35 MPa. These values ​​are suitable when buffer cylinder 111 consists of three 50L cylinders, transfer cylinder 131 consists of one 50L cylinder, and high-pressure cylinder 141 consists of sixteen 50L cylinders. The maximum working pressure that each type of cylinder can withstand is much greater than the design pressure.

[0061] In some embodiments of this application, all buffer cylinders 111 and transfer cylinders 131 are installed on the same side of the second mounting bracket 16, with the transfer cylinder 131 positioned between the buffer cylinders 111 and the high-pressure cylinder 141. This ensures that the transfer cylinder 131 is as close as possible to the buffer cylinders 111 and the high-pressure cylinder 141. A filter is installed at the booster inlet 122 with a filtration accuracy of 10µm to ensure the cleanliness of the gas entering the booster pump 121. The second mounting bracket 16 integrates a gas inlet / outlet panel and an operation panel for easy manual operation and control. The storage and supply device is equipped with a manual shut-off valve, which controls the operation of the device by opening and closing the valve. A low-pressure solenoid valve is installed between the buffer assembly 11 and the booster assembly 12 to control the opening and closing of the booster stage. A one-way valve is installed between the buffer assembly 11 and the booster assembly 12 to prevent gas backflow into the booster assembly 12. The transfer assembly 13 is designed with a high-pressure gauge and a high-pressure sensor to monitor the gas status inside the transfer cylinder 131 in real time. The transfer component 13 is equipped with high-pressure solenoid valves for both its inlet and outlet, allowing for pipeline connections under different operating conditions through the opening and closing of these valves. The gas storage component 14's inlet pipeline connects to the outlet pipeline of the booster component 12. A fifth solenoid valve 129, a high-pressure solenoid valve, is installed at the outlet of the booster component 12 to control the pipeline's opening and closing. A high-pressure gauge and a high-pressure sensor are installed between the gas storage component 14's inlet pipeline and the booster component 12's outlet pipeline to monitor the hydrogen status within the gas cylinder of the gas storage component 14 in real time. Manual shut-off valves are installed at both the inlet and outlet of the gas storage component 14 to control hydrogen flow. A high-pressure solenoid valve is installed in the gas flow path of the gas transmission pipeline before passing the pressure reducing valve 151 to control the pipeline's opening and closing. The gas supply component 15's outlet pipeline connects to the venting pipeline via a low-pressure solenoid valve, allowing for emergency gas venting in special circumstances through the opening and closing of the low-pressure solenoid valve. A high-pressure sensor is installed at the outlet of the gas supply component 15 to monitor the hydrogen supply component's operating status in real time. A manual shut-off valve is installed at the outlet of gas supply assembly 15 to control hydrogen output. A low-pressure solenoid valve is also installed at the outlet of gas supply assembly 15 to control hydrogen output. The solenoid valve can automatically select its operating mode through a program, while the manual shut-off valve requires manual operation and serves to check for risks.

[0062] The staged pressurization and storage module provided in some embodiments of this application can pressurize low-pressure gas to the required pressure, up to 70 MPa. The staged pressurization design allows for achieving higher pressurization using a lower compression ratio, reducing the pressure increase burden of individual pressurization stages, efficiently managing energy consumption, and lowering the rigid requirements for heat dissipation. This allows for the selection of more suitable solutions to reduce noise and vibration generated by the device. Furthermore, the device employs a modular design, with a compact structure and small overall size (2060mm*1030mm*1900mm), meeting the requirements for portable skid-mounted installation.

[0063] Those skilled in the art will understand that the above embodiments are specific implementations of this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. A staged pressurization and storage device, characterized in that, include: The buffer assembly includes multiple buffer gas cylinders, and the gas is buffered to a certain pressure after entering the buffer gas cylinders; The pressurization assembly includes a pressurization pump connected to the buffer gas cylinder, the pressurization pump having a pressurization inlet for gas to enter and exit and a pressurization outlet; The transfer assembly includes a transfer gas cylinder that is interconnected with the pressurization assembly and the buffer assembly via a pipeline; The gas storage assembly includes multiple high-pressure gas cylinders connected to the pressurization assembly and the transfer gas cylinder via pipelines; The booster pump, controlled by different valves and pipelines, pressurizes the gas in the transfer gas cylinder and the high-pressure gas cylinder successively.

2. The staged pressurization and storage device according to claim 1, characterized in that, A first solenoid valve is provided on the communication path between the booster inlet and the buffer component, a second solenoid valve is provided on the communication path between the booster outlet and the gas storage component, a third solenoid valve is provided on the communication path between the booster inlet and the transfer component, and a fourth solenoid valve is provided on the communication path between the booster outlet and the transfer component.

3. The staged pressurization and storage device according to claim 1, characterized in that, The booster pump includes a motor, the output shaft of which is connected to a reducer, the reducer is connected to a crankshaft, and the crankshaft is connected to a piston.

4. The staged pressurization and storage device according to claim 3, characterized in that, The booster assembly also includes a first mounting bracket, and the booster pump is fixed inside the first mounting bracket.

5. The staged pressurization and storage device according to claim 4, characterized in that, A fan is also provided on one side of the first mounting bracket, and the fan blows air toward the piston.

6. The staged pressurization and storage device according to claim 1, characterized in that, The pressurization assembly also includes a vent, which is connected to the pressurization outlet, and a first safety valve is provided on the connection path between the pressurization outlet and the vent.

7. The staged pressurization and storage device according to claim 1, characterized in that, It also includes a second mounting bracket, which is detachably connected to a third mounting bracket. The buffer assembly, the pressurization assembly, and the transfer assembly are respectively installed in different areas of the second mounting bracket, and the gas storage assembly is installed in the third mounting bracket.

8. The staged pressurization and storage device according to claim 7, characterized in that, The gas storage assembly also includes a manifold that communicates with the transfer gas cylinder. Each high-pressure gas cylinder is connected to the manifold through an independent pipe, and the manifold is fixed on the third mounting bracket.

9. The staged pressurization and storage device according to claim 8, characterized in that, It also includes a gas supply assembly connected to the manifold, the gas supply assembly including a gas transmission pipeline connected to the outlet of the gas storage assembly, and a pressure reducing valve is provided on the gas flow path of the gas transmission pipeline.

10. The staged pressurization and storage device according to claim 9, characterized in that, A second safety valve is installed at the inlet of the storage and supply device and at the outlet of the gas supply component.

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