Gas pressurization system

Abstract

The utility model relates to the technical field of hydraulic control, in particular to a gas pressurization system. A gas pressurization system comprises at least two stages of air bag type pressurization units connected in series, a gas storage device is arranged between every two adjacent air bag type pressurization units, one-way valves are arranged between the adjacent air bag type pressurization units and the gas storage device respectively, and one-way circulation between the adjacent air bag type pressurization units is allowed. The air bag type pressurizing unit comprises an air bag type pressurizer, the air bag type pressurizer comprises an outer shell and an inner air bag, the inner air bag is arranged in the outer shell, air can enter and exit from the inner air bag, and a pressurizing cavity is formed between the outer shell and the inner air bag; the liquid source is used for supplying liquid to the pressurizing cavity; the control valve is located between the liquid source and the air bag type pressurizer, and the control valve controls oil inlet and outlet of the pressurizing cavity. The technical problems that in the prior art, hydrogen of a hydrogen compressor is prone to being polluted, and the compression efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control technology, and in particular to a gas boosting system. Background Technology

[0002] With the rapid development of the hydrogen fuel cell vehicle market, the demand for hydrogen refueling stations is also constantly increasing. Hydrogen compressors are one of the key pieces of equipment in hydrogen refueling stations, providing high-pressure hydrogen. Diaphragm compressors, with their advantages of pollution-free compression, high exhaust pressure, and high technological maturity, account for over 60% of the domestic compressor market. Liquid-driven compressors, on the other hand, have achieved a market share of approximately 33% due to their large displacement, small size, and simple maintenance, and this share is continuously rising.

[0003] However, hydraulic compressors mostly use hydraulic cylinders for pressurization and employ sealing rings. If the sealing is inadequate, the hydrogen gas is more likely to be contaminated, and the movement of the piston in the hydraulic cylinder can easily generate significant noise. Diaphragm compressors mostly use an electric motor to drive the crankshaft to rotate, and then use a connecting rod to make the piston reciprocate linearly. However, their discharge capacity is relatively small due to the high pressure ratio and limited gas chamber volume. Utility Model Content

[0004] To address the technical problems of hydrogen being easily contaminated and low compression efficiency in existing hydrogen compressors, this invention provides a gas booster system that solves the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, this utility model provides a gas boosting system, including at least two stages of airbag-type boosting units connected in series, an air storage device is provided between adjacent airbag-type boosting units, and a one-way valve is provided between adjacent airbag-type boosting units and the air storage device to allow unidirectional flow between adjacent airbag-type boosting units.

[0006] According to one embodiment of the present invention, the airbag-type pressurization unit includes:

[0007] An airbag-type booster includes an outer shell and an inner airbag, the inner airbag being placed inside the outer shell and allowing gas to enter and exit, forming a booster chamber between the outer shell and the inner airbag.

[0008] A liquid source, which is used to supply liquid to the pressurization chamber;

[0009] A control valve is located between the liquid source and the airbag-type booster, and the control valve controls the flow of oil into and out of the booster chamber.

[0010] According to one embodiment of the present invention, the control valve is a solenoid valve, and the return oil port of the control valve is connected to a return oil circuit, on which a flow sensor is provided.

[0011] According to one embodiment of the present invention, the liquid source is connected to a safety oil circuit, and an overflow valve is provided on the safety oil circuit.

[0012] According to one embodiment of the present invention, a low-pressure gas source is further included, which supplies gas to the at least two-stage airbag-type pressurization unit connected in series. A one-way valve is provided between the low-pressure gas source and the first-stage airbag-type pressurization unit, allowing the gas from the low-pressure gas source to flow unidirectionally to the first-stage airbag-type pressurization unit.

[0013] According to one embodiment of the present invention, a low-pressure pressure sensor for detecting the pressure of the low-pressure gas source is provided at the low-pressure gas source, and a pressure sensor for detecting the pressure of its pressurization chamber is provided at the airbag-type pressurization unit.

[0014] According to one embodiment of the present invention, it further includes a high-pressure gas cylinder, which collects gas pressurized by at least two stages of airbag-type pressurization units. A one-way valve is provided between the high-pressure gas cylinder and the last stage airbag-type pressurization unit to allow the pressurized gas to flow unidirectionally to the high-pressure gas cylinder.

[0015] According to one embodiment of the present invention, a high-pressure pressure sensor for detecting gas pressure is provided at the high-pressure gas cylinder.

[0016] According to one embodiment of the present invention, the gas storage device is equipped with a medium-pressure sensor for detecting gas pressure.

[0017] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0018] This utility model's gas boosting system employs a bladder-type boosting unit. The bladder completely isolates the gas and oil, preventing contamination of the boosted gas. The boosting pressure comes from the oil squeezing the inner bladder, eliminating the need for piston reciprocating motion, thus improving compression efficiency and reducing noise. At least two stages of bladder-type boosting units increase the pressure level of gas compression, further enhancing compression efficiency. A gas storage device is installed between adjacent bladder-type boosting units, allowing the gas boosted by the previous stage to be stored in the storage device. The gas in the storage device can then enter the next stage of bladder-type boosting unit, ensuring that both adjacent bladder-type boosting units can operate normally.

[0019] This utility model's gas boosting system controls the oil inlet and outlet of the airbag-type booster via a control valve, thereby controlling the booster to pressurize. Furthermore, a flow sensor is installed on the return oil line connected to the solenoid valve. The flow sensor detects the presence of oil in the return oil line to determine whether the inner airbag of the airbag booster is full of gas. Initially, the control valve connects the boosting chamber to the return oil port. When airflow enters the inner airbag, if the flow sensor detects fluid outflow, it indicates that the inner airbag is not completely filled with gas. Once the inner airbag is fully filled with gas, no fluid will flow out of the boosting chamber, and the flow sensor will not transmit a signal. At this point, the control valve can be switched to connect the boosting chamber to the liquid source, allowing oil to enter the boosting chamber and pressurize the gas in the inner airbag.

[0020] The gas boosting system of this utility model has a safety oil circuit connected to the liquid source. An overflow valve is installed on the safety oil circuit to control the system pressure so as not to be too high and to control the maximum boosting value. The one-way valve controls the unidirectional flow of airflow, so that the airflow forms multi-stage boosting.

[0021] The gas pressurization system of this invention is equipped with multiple pressure sensors, which can be used to detect pressure at multiple locations. By comparing adjacent gas pressures, a suitable low-pressure gas source can be selected to control the pressurization state of the airbag-type pressurization unit and pressurize the gas to the required pressure range. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the gas booster system of this utility model;

[0023] Figure 2 This is a schematic diagram of the airbag-type booster unit.

[0024] Figure 3 This is a schematic diagram of a bladder-type turbocharger.

[0025] Figure 4 A flowchart illustrating the process of two-stage boosting in a gas boosting system;

[0026] In the diagram: 1-Airbag-type booster unit; 11-Airbag-type booster; 111-Outer shell; 112-Inner airbag; 113-Boosting chamber; 114-Air chamber; 115-Pressure sensor; 12-Liquid source; 121-Pump; 122-Drive motor; 123-Oil tank; 13-Control valve; 14-Return oil circuit; 141-Flow sensor; 15-Safety oil circuit; 151-Relief valve; 16-Cooler; 2-Air storage device; 21-Medium pressure sensor; 3-Check valve; 4-Low pressure air source; 41-Low pressure sensor; 5-High pressure gas cylinder; 51-High pressure sensor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0030] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0031] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0032] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0033] like Figure 1-4 As shown, this embodiment provides a gas pressurization system, including a low-pressure gas source 4, at least two stages of airbag-type pressurization units 1 connected in series, and a high-pressure gas cylinder 5. The airbag-type pressurization units 1 connected in series can pressurize the gas in at least two stages. The gas from the low-pressure gas source 4 enters the airbag-type pressurization units 1 connected in series for pressurization, and the gas after at least two stages of pressurization is stored in the high-pressure gas cylinder 5.

[0034] The airbag-type booster unit 1 includes an airbag-type booster 11, a liquid source 12, and a control valve 13. The liquid source 12 supplies liquid to the airbag-type booster 11. The control valve 13 is provided between the liquid source 12 and the airbag-type booster 11. The control valve 13 controls the oil flow into and out of the airbag-type booster 11.

[0035] The airbag-type booster 11 includes an outer shell 111 and an inner airbag 112. The inner airbag 112 is placed inside the outer shell 111, forming a booster chamber 113 between the outer shell 111 and the inner airbag 112. An air chamber 114 is formed inside the inner airbag 112, allowing gas to enter the air chamber 114. Oil supplied by the liquid source 12 enters the booster chamber 113 to compress and boost the gas in the air chamber 14. The boosted gas then flows out of the air chamber 114 for further boosting or storage. The outer shell 111 can be made of a rigid material, with a constant shape and volume. The inner airbag 112 has a variable shape, inflating when filled with gas and gradually deflated when deflated. The inner airbag 112 is provided with an air inlet and an air outlet that can communicate with the outside, facilitating the entry and exit of gas in the air chamber 14. The outer shell 111 is provided with an oil port that communicates with the booster chamber 113, facilitating the entry and exit of oil in the booster chamber 113.

[0036] The liquid source 12 is used to supply liquid to the airbag-type booster 11. The liquid source 12 includes a pump 121, a drive motor 122 and an oil tank 123. The outlet of the pump 121 is connected to the booster chamber 113 of the airbag-type booster 11 through the control valve 13. The drive motor 122 drives the pump 121 to work and pump the oil in the oil tank 123 to supply the control valve 13.

[0037] The control valve 13 may be equipped with a two-position three-way valve. The control valve 13 has a pressure port P, a working port A, and a return port T. The pressure port P is connected to the outlet of the pump 121, the working port A is connected to the booster chamber 113 of the airbag-type booster 11, and the return port T is connected to the return oil passage 14. When the control valve 13 is in the first position, the working port A and the return port T are connected, and the oil in the booster chamber 113 can return through the control valve 13. When the control valve 13 is in the second position, the pressure port P and the working port A are connected, and the liquid source 12 supplies oil to the booster chamber 113, which can boost and compress the gas in the inner airbag 112.

[0038] As a preferred technical solution in this embodiment, in order to detect the pressure of the booster chamber 113, a pressure sensor 115 is also provided, which can monitor the oil pressure in the booster chamber 113 in real time.

[0039] As a preferred embodiment, the outlet of pump 121 is also connected to a safety oil circuit 15, on which an overflow valve 151 is installed. The overflow valve 151 serves two purposes: firstly, it prevents excessive system pressure, providing a protective function; secondly, it controls the maximum pressure of the inflatable booster unit 1, facilitating power distribution between different booster stages and thus improving booster efficiency. Preferably, when at least two in-series inflatable booster units 1 are installed, the set pressure value of the overflow valve 151 of the preceding inflatable booster unit 1 can be set lower than the set pressure value of the overflow valve 151 of the following inflatable booster unit 1, according to the sequence of gas boosting, to accommodate pressure changes after multi-stage boosting. In the case of setting two-stage airbag-type booster units 1 in series, the set pressure value of the overflow valve 151 of the first-stage airbag-type booster unit 1 can be set to 200 bar, and the set pressure value of the overflow valve 151 of the second-stage airbag-type booster unit 1 can be set to 300 bar. That is, the maximum boost pressure value of the first-stage airbag-type booster unit 1 is 200 bar, and the maximum boost pressure value of the second-stage airbag-type booster unit 1 is 300 bar.

[0040] As a preferred technical solution in this embodiment, the control valve 13 can be configured as a solenoid valve. In the initial state, the control valve 13 is de-energized and is in the first position; after being energized, the control valve 13 is in the second position.

[0041] As a preferred technical solution in this embodiment, a flow sensor 141 is also provided on the return oil circuit 14 to detect whether the oil in the booster chamber 113 is returning. When the airbag booster 11 is intake, if the flow sensor 141 detects oil on the return oil circuit 14, it proves that the gas has not fully entered the inner airbag 112 of the airbag booster 11 and the inner airbag 112 has not been fully expanded. Then, continue to intake the inner airbag 112 until the flow sensor 141 no longer transmits a signal, proving that the gas has fully entered the inner airbag 112. At this time, the control valve 13 can be adjusted to the second position, and the liquid source 12 supplies liquid to boost the pressure chamber 113.

[0042] As a preferred technical solution in this embodiment, a cooler 16 is also provided on the return oil circuit 14 to cool the return oil. The cooler 16 can be a water cooler, and the cooling water of the cooler 16 can be turned on or off according to the actual temperature of the oil.

[0043] Low-pressure gas source 4 supplies gas to at least two-stage airbag-type pressurization units 1 connected in series. The high-pressure gas after being pressurized by at least two-stage airbag-type pressurization units 1 can enter the high-pressure gas cylinder 5 for storage.

[0044] As a preferred embodiment, to ensure unidirectional flow of gas from the low-pressure gas source 4 to at least two connected airbag-type pressurization units 1, a one-way valve 3 is provided on the air passage between the low-pressure gas source 4 and the at least two connected airbag-type pressurization units 1 to control the unidirectional flow of gas. To ensure that the gas pressurized by the at least two connected airbag-type pressurization units 1 enters the high-pressure gas cylinder 5 for storage unidirectionally, a one-way valve 3 is also provided on the air passage between the at least two connected airbag-type pressurization units 1 and the high-pressure gas cylinder 5.

[0045] As a preferred embodiment, a low-pressure sensor 41 is provided to detect the pressure of the low-pressure gas source 4. Similarly, a high-pressure sensor 51 is provided to detect the pressure inside the high-pressure gas cylinder 5.

[0046] An air storage device 2 is provided between adjacent airbag-type pressurization units 1. A one-way valve 3 is provided between adjacent airbag-type pressurization units 1 and air storage devices 2 respectively, allowing unidirectional gas flow between adjacent airbag-type pressurization units 1. The gas pressurized by the previous airbag-type pressurization unit 1 can flow unidirectionally and be stored in the air storage device 2. The gas in the air storage device 2 can flow unidirectionally to the next airbag-type pressurization unit 1. The air storage device 2 can play a buffering role for airflow. Taking a two-stage series-connected airbag-type pressurization unit 1 as an example, the two-stage series-connected airbag-type pressurization unit 1 consists of a first-stage airbag-type pressurization unit and a second-stage airbag-type pressurization unit. The gas is first pressurized by the first-stage airbag-type pressurization unit and then by the second-stage airbag-type pressurization unit. A gas storage device 2 is provided between the first-stage airbag-type pressurization unit and the second-stage airbag-type pressurization unit. Specifically, the gas storage device 2 is located between the two airbag-type pressurizers and is connected to the air passage between the two airbag-type pressurizers. A one-way valve 3 is provided between the airbag-type pressurizer of the first-stage airbag-type pressurization unit and the gas storage device 2 to control the one-way flow of the pressurized gas from the first-stage airbag-type pressurization unit to the gas storage device 2. A one-way valve 3 is also provided between the gas storage device 2 and the airbag-type pressurizer of the second-stage airbag-type pressurization unit to control the one-way flow of the gas in the gas storage device 2 to the second-stage airbag-type pressurization unit. If a third-stage airbag-type pressurization unit is added, an air storage device and a one-way valve are installed between the second-stage and third-stage airbag-type pressurization units to control the gas pressurized by the second-stage airbag-type pressurization unit to flow unidirectionally to the air storage device, and the gas in the air storage device to flow unidirectionally to the third-stage airbag-type pressurization unit, and so on, to perform multi-stage pressurization and buffering.

[0047] As a preferred technical solution in this embodiment, a medium-pressure sensor 21 is provided on the gas storage device 2.

[0048] Based on the above structure, the gas pressurization system is configured to include two-stage airbag-type pressurization units 1 connected in series, namely the first-stage airbag-type pressurization unit and the second-stage airbag-type pressurization unit; the low-pressure sensor 41 detects the gas pressure of the low-pressure gas source 4 as PL, the pressure sensor 115 of the first-stage airbag-type pressurization unit detects the pressure of the pressurization chamber of the airbag-type pressurizer 11 as P1, the pressure sensor 115 of the second-stage airbag-type pressurization unit detects the pressure of the pressurization chamber of the airbag-type pressurizer 11 as P2, the medium-pressure sensor 21 detects the gas pressure in the gas storage device 2 as PM, and the high-pressure sensor 51 detects the gas pressure in the high-pressure gas cylinder 5 as PH. Figure 4 As shown, the working process of the gas booster system in this embodiment is as follows:

[0049] 1) Preparation stage

[0050] a) Based on power distribution and safety requirements, set the pressure values ​​of the overflow valve of the first-stage airbag-type booster unit and the overflow valve of the second-stage airbag-type booster unit. For example, set the pressure value of the overflow valve of the first-stage airbag-type booster unit to 200 bar and the pressure value of the overflow valve of the second-stage airbag-type booster unit to 300 bar. That is, the maximum boost value of the first-stage airbag-type booster unit is 200 bar and the maximum boost value of the second-stage airbag-type booster unit is 300 bar.

[0051] b) Start the motor 122 and pump 121 of the two-stage airbag-type booster unit;

[0052] c) Turn the cooling water of cooler 16 on or off according to the actual temperature of the oil.

[0053] 2) First-stage boost

[0054] a) When the control valve 13 of the first-stage airbag-type booster unit is de-energized, the system compares the magnitudes of PL and P1: if PL > P1, the gas from the low-pressure gas source 4 enters the air chamber 114 of the first-stage airbag-type booster unit, the gas in the air chamber 114 increases continuously, the inner airbag 112 expands, and the oil in the booster chamber 113 flows out through the control valve 13; if PL ≯ P1, it means that the gas pressure of the low-pressure gas source 4 is too low and insufficient to enter the first-stage airbag-type booster unit. At this time, the low-pressure gas source 4 needs to be inflated or replaced until the condition of PL > P1 is met.

[0055] b) Under the condition that PL>P1, if the flow sensor 141 of the first-stage airbag-type booster unit does not transmit a signal, that is, the gas from the low-pressure gas source 4 has fully entered the inner airbag 112 of the first-stage airbag-type booster unit, and the oil in the booster chamber 113 no longer flows out, then the control valve 13 of the first-stage airbag-type booster unit is energized, and the pump 121 of the liquid source 12 pressurizes the first-stage airbag-type booster unit, which is the first-stage booster process; if the flow sensor 141 of the first-stage airbag-type booster unit transmits a signal, it means that the gas from the low-pressure gas source 4 has not fully entered the inner airbag 112 of the first-stage airbag-type booster unit, then the control valve 13 of the first-stage airbag-type booster unit remains de-energized until the flow sensor 141 of the first-stage airbag-type booster unit transmits no signal, then the control valve 13 of the first-stage airbag-type booster unit is energized, and the first-stage booster process begins;

[0056] c) During the first-stage pressurization process: The pressure of P1 gradually increases, then P1 is slightly greater than PM and maintains a synchronous increase. After a period of time, when P1-PM>n bar, the first-stage pressurization ends, the control valve 13 of the first-stage airbag pressurization unit is de-energized, and the process in a) begins, thus cyclically increasing the pressure. (Note: n is a fixed value at this time, which can be set according to the opening pressure of the check valve and the actual pressure loss).

[0057] 3) Two-stage turbocharging

[0058] d) When the control valve 13 of the second-stage airbag-type booster unit is de-energized, the system compares the magnitudes of PM and P2: if PM > P2, the gas from the gas storage device 2 enters the gas chamber 114 of the second-stage airbag-type booster unit, the gas in the gas chamber 114 increases continuously, the inner airbag 112 expands, and the oil in the booster chamber 113 flows out through the control valve 13; if PM ≯ P2, it means that the gas pressure of the low-pressure gas source 4 is too low, resulting in a low gas pressure in the boosted gas storage device 2, which is insufficient to enter the second-stage airbag-type booster unit. At this time, the low-pressure gas source 4 needs to be inflated or replaced until the condition PM > P2 is met.

[0059] e) Under the condition that PM>P2, if the flow sensor 141 of the second-stage airbag-type booster unit does not transmit a signal, it means that the gas in the gas storage device 2 has fully entered the inner airbag 112 of the second-stage airbag-type booster unit, and the oil in the booster chamber 113 no longer flows out. At this time, the control valve 13 of the second-stage airbag-type booster unit is energized, and the pump 121 of the liquid source 12 pressurizes the second-stage airbag-type booster unit. This is the second-stage booster process. If the flow sensor 141 of the second-stage airbag-type booster unit transmits a signal, it means that the gas in the gas storage device 2 has not fully entered the inner airbag 112 of the second-stage airbag-type booster unit. The control valve 13 of the second-stage airbag-type booster unit remains de-energized until the flow sensor 141 of the second-stage airbag-type booster unit transmits no signal. Then the control valve 13 of the second-stage airbag-type booster unit is energized, and the second-stage booster process begins.

[0060] f) During the secondary pressurization process: The pressure of P2 gradually increases, then P2 is slightly greater than PH and maintains a synchronous increase. After a period of time, when P2-PH>m bar, the secondary pressurization ends, the control valve 13 of the second-stage airbag pressurization unit is de-energized, and the process enters d), thus cyclically increasing the pressure. (Note: At this time, m is a fixed value, set according to the opening pressure of the check valve and the actual pressure loss).

[0061] First-stage and second-stage boost occur simultaneously.

[0062] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A gas boosting system, characterized in that, It includes at least two airbag-type booster units (1) connected in series, with an air storage device (2) provided between adjacent airbag-type booster units (1), and a one-way valve (3) provided between adjacent airbag-type booster units (1) and the air storage device (2) respectively, allowing one-way flow between adjacent airbag-type booster units (1).

2. The gas boosting system according to claim 1, characterized in that, The airbag-type booster unit (1) includes: The airbag-type booster (11) includes an outer shell (111) and an inner airbag (112). The inner airbag (112) is placed inside the outer shell (111) and can allow gas to enter and exit. A boosting chamber (113) is formed between the outer shell (111) and the inner airbag (112). Liquid source (12), the liquid source (12) is used to supply liquid to the pressurization chamber (113); A control valve (13) is located between the liquid source (12) and the airbag-type booster (11), and the control valve (13) controls the oil flow into and out of the booster chamber (113).

3. The gas boosting system according to claim 2, characterized in that, The control valve (13) is a solenoid valve, and the return oil port of the control valve (13) is connected to the return oil passage (14), and a flow sensor (141) is installed on the return oil passage (14).

4. A gas booster system according to claim 2, characterized in that, The liquid source (12) is connected to a safety oil circuit (15), and an overflow valve (151) is provided on the safety oil circuit (15).

5. A gas booster system according to claim 2, characterized in that, It also includes a low-pressure gas source (4), which supplies gas to the at least two-stage airbag-type booster unit (1) connected in series. A one-way valve (3) is provided between the low-pressure gas source (4) and the first-stage airbag-type booster unit (1) to allow the gas from the low-pressure gas source (4) to flow unidirectionally to the first-stage airbag-type booster unit (1).

6. A gas booster system according to claim 5, characterized in that, A low-pressure sensor (41) for detecting the pressure of the low-pressure gas source (4) is provided at the low-pressure gas source (4), and a pressure sensor (115) for detecting the pressure of its pressurization chamber (113) is provided at the airbag pressurization unit (1).

7. A gas booster system according to claim 2, characterized in that, It also includes a high-pressure gas cylinder (5), which collects gas that has been pressurized by at least two stages of airbag-type pressurization units (1). A one-way valve (3) is provided between the high-pressure gas cylinder (5) and the last stage airbag-type pressurization unit (1) to allow the pressurized gas to flow unidirectionally to the high-pressure gas cylinder (5).

8. A gas booster system according to claim 7, characterized in that, A high-pressure sensor (51) for detecting gas pressure is installed at the high-pressure gas cylinder (5).

9. A gas booster system according to claim 1, characterized in that, The gas storage device (2) is equipped with a medium-pressure sensor (21) for detecting gas pressure.

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