Preparation method of gas storage cylinder suitable for air suspension system and gas storage cylinder

Abstract

The invention belongs to the technical field of vehicle gas storage bottles, and discloses a preparation method of a gas storage bottle suitable for an air suspension system and the gas storage bottle, in the gas storage bottle, a fiber reinforcement layer comprising an annular layer and a first spiral layer is wound on the periphery of an inner container of the gas storage bottle, the fiber reinforcement layer is made of a fiber composite material, and in addition, the annular layer and the first spiral layer are wound on the periphery of the inner container. The first spiral layer wraps all parts of the inner container, that is, the fiber composite material covers all parts of the inner container, so that the fatigue resistance and the structural strength of the gas storage cylinder can be enhanced, the gas storage cylinder can be used for a long time, damage or failure caused by internal pressure circulation is avoided, and the service life of the gas storage cylinder can be prolonged. Moreover, the fiber composite material is high in corrosion resistance, so that an anti-corrosion layer does not need to be coated on the outer surface of the gas storage cylinder, the requirement on regular maintenance of the gas storage cylinder is reduced, and the use cost can be further reduced. In addition, compared with a traditional all-metal gas storage cylinder, the gas storage cylinder manufactured in the mode has the great light weight advantage.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle gas cylinders, and in particular to a preparation method of a gas cylinder suitable for an air suspension system and the gas cylinder. Background Art

[0002] At present, most gas cylinders used in vehicle air suspension systems adopt an all-metal cylinder structure. However, due to the shortcomings of metal materials in terms of corrosion resistance, the inner and outer surfaces of the gas cylinders must be coated with an anti-corrosion layer, and regular maintenance is required to prevent the anti-corrosion layer from failing, which leads to increased use costs. In addition, during actual use, the gas cylinders will be repeatedly inflated and deflated. Under this working condition, the gas cylinders are subjected to alternating loads for a long time. However, due to the poor performance of the metal cylinder body in fatigue resistance, after a period of use, the gas cylinders are prone to damage or failure due to stress fatigue, resulting in a short service life of the gas cylinders. In addition, the structural strength (specific strength) per unit mass of metal materials is not high, which makes it difficult for gas cylinders to meet the increasing demand for lightweighting in vehicle use. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for preparing a gas cylinder suitable for an air suspension system and a gas cylinder, so as to solve the problems of high maintenance requirements and high usage costs caused by the need to coat the inner and outer surfaces of the vehicle-mounted air suspension gas cylinder with an anti-corrosion layer; the problem that the metal bottle body has poor fatigue resistance, resulting in a short service life of the gas cylinder; and the problem of lightweighting the air suspension gas cylinder.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A method for preparing a gas cylinder suitable for an air suspension system, the gas cylinder comprising an inner liner, wherein a first valve seat and a second valve seat are respectively provided at both ends of the inner liner. The method for preparing the gas cylinder suitable for an air suspension system comprises:

[0006] A first fiber tape is wound around the outer periphery of the inner liner to form an annular layer, and the first fiber tape is wound along the axial direction of the inner liner to form a plurality of continuous annular tapes;

[0007] A second fiber band is spirally wound around the periphery of the inner liner to form a first spiral layer. The second fiber band is wound at a first winding angle. After winding, the first spiral layer covers the inner liner, and the first spiral layer is respectively sleeved on the outer periphery of the first valve seat and the second valve seat at both ends along the axial direction of the inner liner.

[0008] Preferably, the method for preparing the gas storage cylinder suitable for the air suspension system further comprises:

[0009] A second spiral layer is wound around the outer periphery of the first spiral layer. The second spiral layer is wound by a third fiber tape at a second winding angle. The second winding angle is greater than the first winding angle. After winding, the second spiral layer covers the portion of the first spiral layer located between the first valve seat and the second valve seat.

[0010] Preferably, the inner liner is made of aluminum alloy, and the first fiber band, the second fiber band and the third fiber band are all made of glass fiber or carbon fiber.

[0011] Preferably, the inner liner is made of plastic, and the first fiber band, the second fiber band and the third fiber band are all made of glass fiber or carbon fiber.

[0012] Preferably, the method for preparing the gas storage cylinder suitable for the air suspension system further comprises:

[0013] A third helical layer is wound around the outer periphery of the second helical layer. The third helical layer is wound by a fourth fiber tape at a third winding angle. The third winding angle is greater than the second winding angle. After winding, along the radial direction of the inner liner, the projection of the third helical layer is smaller than the projection of the second helical layer and larger than the projection of the cylindrical portion of the inner liner.

[0014] Preferably, before winding the first fiber tape, the first fiber tape is impregnated with resin;

[0015] Before winding the second fiber tape, the second fiber tape is impregnated with resin.

[0016] Another aspect of the present invention provides a gas cylinder prepared using the above-mentioned method for preparing a gas cylinder suitable for an air suspension system, the gas cylinder comprising:

[0017] An inner liner is provided with a first valve seat and a second valve seat at both ends along its axial direction, the inner liner includes a cylindrical portion, and both ends of the cylindrical portion extend to form a first head and a second head, and the first head and the second head are respectively sleeved on the outer circumference of the first valve seat and the second valve seat;

[0018] The fiber-reinforced layer includes a circumferential layer and a first spiral layer. The circumferential layer is wrapped around the outer periphery of the cylindrical portion, the first spiral layer is wrapped around the outer periphery of the inner liner, and the first spiral layer is respectively sleeved on the outer peripheries of the first valve seat and the second valve seat at both ends along the axial direction of the inner liner.

[0019] Preferably, a first plug is provided at one end of the first valve seat, the first plug is provided with a first annular embedding groove around the axis of the first valve seat, and the end of the first head away from the cylindrical portion is embedded in the first annular embedding groove; a second plug is provided at one end of the second valve seat, the second plug is provided with a second annular embedding groove around the axis of the second valve seat, and the end of the second head away from the cylindrical portion is embedded in the second annular embedding groove;

[0020] The first spiral layer covers the inner liner, the first plug and the second plug.

[0021] Preferably, a second spiral layer is provided on the periphery of the first spiral layer, and the second spiral layer covers a portion of the first spiral layer located between the first valve seat and the second valve seat.

[0022] Beneficial effects of the present invention:

[0023] In the present invention, the outer periphery of the gas cylinder's inner liner is wrapped with a fiber-reinforced layer comprising a circumferential layer and a first helical layer. The fiber-reinforced layer is a fiber composite material. Furthermore, the first helical layer encases all parts of the inner liner, i.e., the fiber composite material covers all parts of the inner liner. This enhances the gas cylinder's fatigue resistance and structural strength, ensuring that the gas cylinder can be used for extended periods without damage or failure due to stress or internal pressure cycling. In other words, the present invention can increase the gas cylinder's service life. Furthermore, the fiber composite material's strong corrosion resistance eliminates the need for an anti-corrosion coating on the outer surface of the gas cylinder, thus eliminating the need for regular maintenance and reducing operating costs. Furthermore, the use of fiber composite materials effectively achieves the goal of lightweighting the gas cylinder.

[0024] The gas cylinder of the present invention comprises an inner liner and a fiber-reinforced layer. The fiber-reinforced layer completely covers the outer periphery of the inner liner and can bear the majority of the cylinder's mechanical load. Due to the high strength and fatigue resistance of the fiber composite material, the service life of the gas cylinder can be extended. Furthermore, the fiber composite material's strong corrosion resistance eliminates the need for an anti-corrosion coating on the outer surface of the gas cylinder, thus eliminating the need for regular maintenance and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of a method for preparing a gas storage cylinder suitable for an air suspension system in an embodiment of the present invention;

[0026] Figure 2 is a cross-sectional view of the gas storage cylinder along its longitudinal section in the first embodiment of the present invention;

[0027] Figure 3 is a cross-sectional view of the inner container along its longitudinal section in the first embodiment of the present invention;

[0028] Figure 4 is a cross-sectional view of the first valve seat along its longitudinal section in an embodiment of the present invention;

[0029] Figure 5 is a simulation schematic diagram of an inner container in an embodiment of the present invention;

[0030] Figure 6 2. It is a schematic diagram of a simulation of a wound hoop layer in an embodiment of the present invention;

[0031] Figure 7 2 is a schematic diagram of a simulation of winding the first spiral layer in an embodiment of the present invention;

[0032] Figure 8 2 is a schematic diagram of a simulation of winding a second spiral layer in an embodiment of the present invention;

[0033] Figure 9 is a schematic diagram of the expansion of the cylindrical portion in an embodiment of the present invention;

[0034] Figure 10 2 is a cross-sectional view of the gas storage cylinder in the second embodiment of the present invention along its longitudinal section.

[0035] In the picture:

[0036] 1. Inner liner; 11. Cylindrical portion; 12. First end cap; 13. Second end cap; 14. First opening; 15. Second opening;

[0037] 2. First valve seat; 21. First plug; 211. First annular groove;

[0038] 3. Second valve seat; 31. Second plug;

[0039] 4. Fiber reinforcement layer. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0041] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0044] Example 1

[0045] This embodiment provides an air suspension system, which includes an air storage bottle, such as Figures 2 to 4 As shown, the gas cylinder includes an inner liner 1, and a first valve seat 2 and a second valve seat 3 are respectively provided at both ends of the inner liner 1. Specifically, a first opening 14 and a second opening 15 are respectively provided at both ends of the inner liner 1 along its axial direction. The first valve seat 2 extends into the interior of the inner liner 1 through the first opening 14, and the second valve seat 3 extends into the interior of the inner liner 1 through the second opening 15. The first valve seat 2 and the second valve seat 3 are respectively connected to the air inlet pipe and the air outlet pipe, thereby realizing the charging and discharging of the gas cylinder.

[0046] Of course, in other optional embodiments, only one of the first valve seat 2 and the second valve seat 3 may be installed with a valve system to realize the charging and discharging of the gas cylinder, while the other remains sealed to ensure the airtightness of the gas cylinder.

[0047] Based on the above, this embodiment provides a method for preparing a gas cylinder suitable for an air suspension system. Figure 1 , and combined with Figure 2 as well as Figures 5 to 7 The preparation method of the gas storage cylinder suitable for the air suspension system includes:

[0048] A first fiber tape is wound around the outer periphery of the inner liner 1 to form an annular layer. Along the axial direction of the inner liner 1, the first fiber tape is wound to form a plurality of continuous annular tapes.

[0049] A second fiber tape is spirally wound around the periphery of the inner liner 1 to form a first spiral layer. The second fiber tape is wound according to a first winding angle. After winding, the first spiral layer covers the inner liner 1, and the first spiral layer is respectively sleeved on the periphery of the first valve seat 2 and the second valve seat 3 at both ends along the axial direction of the inner liner 1.

[0050] That is, in this embodiment, the inner liner 1 is firstly wound in a circumferential direction to form a circumferential layer, and then the inner liner 1 and the circumference of the circumferential layer are spirally wound to form a first spiral layer.

[0051] As described above, in this embodiment, the outer circumference of the gas cylinder's inner liner 1 is wrapped with a fiber-reinforced layer 4 comprising a circumferential layer and a first helical layer. The fiber-reinforced layer 4 is a fiber composite material. Furthermore, the first helical layer envelops all parts of the inner liner 1. In other words, the fiber composite material covers all parts of the inner liner 1, thereby enhancing the gas cylinder's fatigue resistance and structural strength, ensuring that the gas cylinder can be used for a long time without damage or failure due to internal pressure cycling. In other words, this embodiment can increase the gas cylinder's service life. Furthermore, the fiber composite material's strong corrosion resistance eliminates the need for an anti-corrosion coating on the outer surface of the gas cylinder, thereby reducing the need for regular maintenance and lowering operating costs. Furthermore, gas cylinders manufactured in this manner offer significant lightweight advantages over traditional all-metal gas cylinders.

[0052] It is understandable that, based on the strength requirements of the gas cylinder body, the circumferential layer can be wound in one or more layers, and this embodiment does not impose any specific limitation on this.

[0053] Moreover, it is worth mentioning that fiber composite materials have better damping and vibration reduction performance. Specifically, fiber composite materials have a higher natural frequency than traditional metal materials and are generally less prone to vibration. At the same time, thanks to the greater ability of the composite matrix and the fiber interface to absorb vibration energy, even if vibration occurs, it can stop in a short time, thereby ensuring the stable operation of the entire air suspension system.

[0054] Based on the above, please refer to Figures 2 to 4 In this embodiment, a gas cylinder manufactured using the aforementioned method for manufacturing a gas cylinder suitable for an air suspension system includes an inner liner 1 and a fiber-reinforced layer 4. The inner liner 1 is provided with a first valve seat 2 and a second valve seat 3 at its axial ends. Specifically, the inner liner 1 includes a cylindrical portion 11, with the ends of the cylindrical portion 11 extending to form a first end cap 12 and a second end cap 13. The first end cap 12 and the second end cap 13 are respectively sleeved around the outer circumferences of the first valve seat 2 and the second valve seat 3. The fiber-reinforced layer 4 includes a circumferential layer and a first helical layer. The circumferential layer covers the outer circumference of the cylindrical portion 11, and the first helical layer covers the outer circumference of the inner liner 1. The first helical layer is sleeved around the outer circumferences of the first valve seat 2 and the second valve seat 3 at its axial ends.

[0055] With this arrangement, the fiber-reinforced layer 4 completely wraps around the outer periphery of the inner liner 1 and can bear the majority of the cylinder's mechanical load. Due to the fiber composite material's superior strength and fatigue resistance, the cylinder's service life is extended. Furthermore, the fiber composite material's strong corrosion resistance eliminates the need for an anti-corrosion coating on the cylinder's outer surface, eliminating the need for regular maintenance and reducing operating costs.

[0056] Based on the above, this embodiment can also increase the service life of the air suspension system using the above-mentioned gas cylinder.

[0057] Furthermore, a first plug 21 is provided at one end of the first valve seat 2, and a first annular groove 211 is provided at the first plug 21 around the axis of the first valve seat 2. The end of the first head 12 away from the cylindrical portion 11 is embedded in the first annular groove 211. Correspondingly, a second plug 31 is provided at one end of the second valve seat 3, and a second annular groove (not shown in the figure) is provided at the second plug 31 around the axis of the second valve seat 3. The end of the second head 13 away from the cylindrical portion 11 is embedded in the second annular groove, thereby improving the airtightness of the gas cylinder.

[0058] From the above, the first spiral layer covers the inner liner 1, the first plug 21 and the second plug 31, that is, the first spiral layer is tangent to the first valve seat 2 and the second valve seat 3 at both ends along the axial direction of the inner liner 1, thereby completely wrapping the cylindrical portion 11 of the inner liner 1, the arc-shaped portion between the cylindrical portion 11 and the first valve seat 2, and the arc-shaped portion between the cylindrical portion 11 and the second valve seat 3, thereby fully enhancing the fatigue resistance and structural strength of the gas cylinder.

[0059] It is worth noting that if Figure 9 As shown, in this embodiment, the winding angle of the first fiber band is α, the width of the first fiber band is a, and the circumference of the cylindrical portion 11 along its circumferential direction is b. Therefore, in this embodiment, the calculation formula of α is:

[0060]

[0061] It can be understood that α is close to 90°.

[0062] In addition, the first winding angle is β, the width of the second fiber band is c, the diameters of the first opening 14 and the second opening 15 are r, and the diameter of the cylindrical portion 11 of the liner 1 is R. Therefore, according to the Clairaut equation, in this embodiment, the calculation formula of β is:

[0063]

[0064] As described above, in this embodiment, the first winding angle is relatively small, so that the first spiral layer can completely cover the inner liner 1 after winding.

[0065] Furthermore, based on simulation, in actual use, the portion of the first head 12 located between the first valve seat 2 and the cylindrical portion 11 and the portion of the second head 13 located between the second valve seat 3 and the cylindrical portion 11 will be subjected to greater pressure. Figure 8 As shown, in this embodiment, the method for preparing a gas storage cylinder suitable for an air suspension system further includes:

[0066] A second spiral layer is wound around the outer periphery of the first spiral layer. The second spiral layer is wound by a third fiber tape at a second winding angle. The second winding angle is greater than the first winding angle. After winding, the second spiral layer covers the portion of the first spiral layer located between the first valve seat 2 and the second valve seat 3.

[0067] That is, in this embodiment, the second helical layer is provided on the periphery of the first helical layer, and the second helical layer covers the portion of the first helical layer located between the first valve seat 2 and the second valve seat 3 .

[0068] As described above, this embodiment forms a second spiral layer by spirally winding at a larger angle, and makes the second spiral layer cover the portion of the first spiral layer located between the first valve seat 2 and the second valve seat 3, thereby increasing the structural strength and fatigue resistance of the portion of the bottle body located between the first valve seat 2 and the second valve seat 3. That is, this embodiment can reinforce this portion to further prevent cracks from occurring in this portion due to stress damage, thereby further improving the service life of the gas cylinder.

[0069] Furthermore, before the first fiber tape is wound, the first fiber tape is impregnated with resin; and before the second fiber tape is wound, the second fiber tape is impregnated with resin.

[0070] As described above, the fiber composite material forms a fiber reinforced composite material after being impregnated with resin and can be shaped, thereby ensuring that the first fiber tape can be effectively wrapped around the outer periphery of the inner liner 1 to form a circumferential layer, and ensuring that the second fiber tape can be effectively wrapped around the outer periphery of the inner liner 1 to form a first spiral layer. On the other hand, after being impregnated with resin, the fatigue resistance, structural strength and corrosion resistance of the annular layer and the first spiral layer can be further enhanced, thereby further improving the service life of the gas cylinder.

[0071] It can be understood that before winding the third fiber tape, the third fiber tape is also impregnated with resin, so as to ensure that the third fiber tape can be effectively wound around the outer periphery of the inner liner 1 to form a second spiral layer. On the other hand, after being impregnated with resin, the fatigue resistance, structural strength and corrosion resistance of the second spiral layer can be further enhanced, thereby further improving the service life of the gas cylinder.

[0072] Illustratively, in this embodiment, the inner liner 1 is made of aluminum alloy, and the first fiber band, the second fiber band and the third fiber band are all made of glass fiber.

[0073] As described above, since aluminum alloy has high resistance to external forces and wide temperature adaptability, and glass fiber has low cost, this embodiment is suitable for scenarios where performance requirements are not too high, there are certain requirements for resistance to external forces, a wide range of temperature adaptability is required, and the manufacturing cost of gas cylinders needs to be controlled.

[0074] In addition, it is worth mentioning that the gas cylinders made by winding fiber composite materials are lighter in weight than simple metal gas cylinders, thus meeting the lightweight requirements of vehicles.

[0075] Of course, in other optional embodiments, the first fiber band, the second fiber band and the third fiber band wrapped around the outer periphery of the inner liner 1 made of aluminum alloy may also be made of carbon fiber materials, and this embodiment does not impose specific restrictions on this.

[0076] As described above, illustratively, in this embodiment, the diameter of the inner liner 1 is 140 mm, the width of the second fiber band is 18 mm, and the diameters of the first opening 14 and the second opening 15 are 46 mm. Therefore, in this embodiment, the first winding angle is equal to 27°.

[0077] In addition, through simulation calculation, the second winding angle is equal to 42°.

[0078] Example 2

[0079] Combine Figure 10 Compared with the first embodiment, the difference of this embodiment is that: in this embodiment, the inner liner 1 is made of plastic material, and the first fiber band, the second fiber band and the third fiber band are all made of carbon fiber material.

[0080] As described above, since the plastic liner 1 is lighter and has better corrosion resistance, and the carbon fiber material has the characteristics of light weight and high strength, this embodiment is suitable for use scenarios that pursue lightweight.

[0081] However, since the plastic inner liner 1 has relatively weak resistance to external impact, in this embodiment, the preparation method of the gas storage cylinder suitable for the air suspension system further includes:

[0082] A third helical layer is wound around the outer periphery of the second helical layer. The third helical layer is wound by a fourth fiber tape according to a third winding angle. The third winding angle is greater than the second winding angle. After winding, along the radial direction of the inner liner 1, the projection of the third helical layer is smaller than the projection of the second helical layer, and larger than the projection of the cylindrical portion 11 of the inner liner 1.

[0083] That is, in this embodiment, the third spiral layer is continuously wound around the periphery of the second spiral layer, thereby increasing the thickness of the fiber reinforced layer 4 and further improving the ability of the gas cylinder to resist external impact.

[0084] As described above, illustratively, in this embodiment, the diameter of the inner liner 1 is 200 mm, the width of the second fiber band is 18 mm, and the diameters of the first opening 14 and the second opening 15 are 64 mm. Therefore, in this embodiment, the first winding angle is equal to 24°.

[0085] In addition, through simulation calculation, the second winding angle is equal to 32°, and the third winding angle is equal to 40°.

[0086] Of course, in other optional embodiments, the first fiber band, the second fiber band and the third fiber band wrapped around the outer periphery of the inner liner 1 made of plastic material may also be made of glass fiber, and this embodiment does not impose any specific limitation on this.

[0087] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a gas cylinder suitable for an air suspension system, wherein the gas cylinder comprises an inner liner (1), wherein a first valve seat (2) and a second valve seat (3) are respectively provided at both ends of the inner liner (1), and wherein: The method for preparing the gas storage cylinder suitable for the air suspension system comprises: A first fiber band is wound circumferentially around the outer periphery of the inner liner (1) to form an annular layer, and the first fiber band is wound axially along the inner liner (1) to form a plurality of continuous annular bands; A second fiber band is spirally wound around the periphery of the inner liner (1) to form a first spiral layer, and the second fiber band is wound at a first winding angle. After winding, the first spiral layer covers the inner liner (1), and the first spiral layer is respectively sleeved on the periphery of the first valve seat (2) and the second valve seat (3) at both ends along the axial direction of the inner liner (1).

2. The method for preparing a gas cylinder suitable for an air suspension system according to claim 1, characterized in that: The method for preparing the gas storage cylinder suitable for the air suspension system further comprises: A second spiral layer is wound around the periphery of the first spiral layer, the second spiral layer is wound by a third fiber tape at a second winding angle, the second winding angle being greater than the first winding angle, and after winding, the second spiral layer covers the portion of the first spiral layer located between the first valve seat (2) and the second valve seat (3).

3. The method for preparing a gas cylinder suitable for an air suspension system according to claim 2, characterized in that: The inner liner (1) is made of aluminum alloy, and the first fiber band, the second fiber band, and the third fiber band are all made of glass fiber or carbon fiber.

4. The method for preparing a gas cylinder suitable for an air suspension system according to claim 2, characterized in that: The inner liner (1) is made of plastic, and the first fiber band, the second fiber band and the third fiber band are all made of glass fiber or carbon fiber.

5. The method for preparing a gas cylinder suitable for an air suspension system according to claim 4, characterized in that: The method for preparing the gas storage cylinder suitable for the air suspension system further comprises: A third helical layer is wound around the outer periphery of the second helical layer, the third helical layer being wound by a fourth fiber tape at a third winding angle, the third winding angle being greater than the second winding angle, and after winding, along the radial direction of the inner liner (1), the projection of the third helical layer is smaller than the projection of the second helical layer and is larger than the projection of the cylindrical portion (11) of the inner liner (1).

6. The method for preparing a gas cylinder suitable for an air suspension system according to claim 1, characterized in that: Before winding the first fiber tape, impregnating the first fiber tape with resin; Before winding the second fiber tape, the second fiber tape is impregnated with resin.

7. A gas cylinder, prepared by the method for preparing a gas cylinder suitable for an air suspension system according to any one of claims 1 to 6, characterized in that: The gas cylinder comprises: An inner liner (1) is provided with a first valve seat (2) and a second valve seat (3) at two ends along its axial direction, the inner liner (1) comprises a cylindrical portion (11), two ends of the cylindrical portion (11) extend to form a first head (12) and a second head (13), the first head (12) and the second head (13) are respectively sleeved on the outer periphery of the first valve seat (2) and the second valve seat (3); The fiber-reinforced layer (4) comprises a circumferential layer and a first spiral layer, wherein the circumferential layer is coated on the outer periphery of the cylindrical portion (11), the first spiral layer is coated on the outer periphery of the inner liner (1), and the first spiral layer is respectively sleeved on the outer peripheries of the first valve seat (2) and the second valve seat (3) at both ends along the axial direction of the inner liner (1).

8. The gas cylinder according to claim 7, characterized in that: A first plug (21) is provided at one end of the first valve seat (2), and a first annular embedding groove (211) is provided on the first plug (21) around the axis of the first valve seat (2), and an end of the first head (12) away from the cylindrical portion (11) is embedded in the first annular embedding groove (211); a second plug (31) is provided at one end of the second valve seat (3), and a second annular embedding groove is provided on the second plug (31) around the axis of the second valve seat (3), and an end of the second head (13) away from the cylindrical portion (11) is embedded in the second annular embedding groove; The first spiral layer covers the inner liner (1), the first plug (21) and the second plug (31).

9. The gas cylinder according to claim 7, characterized in that: A second spiral layer is provided on the periphery of the first spiral layer, and the second spiral layer covers the portion of the first spiral layer located between the first valve seat (2) and the second valve seat (3).

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