Modular gas cylinder fixation device and fixation method thereof

Abstract

This invention relates to a modular gas cylinder fixing device and its fixing method. The invention includes a lower base; an expansion device disposed on the lower base, the expansion device comprising a supporting arc plate, a support plate, and an elastic tension element; one end of each support plate is rotatably connected to the supporting arc plate, and the other end of each support plate is slidably connected to the lower base; the elastic tension element is disposed between two support plates to provide a force that pulls them closer together; the arc surface can move downwards relative to the lower base under the weight of the gas cylinder; an upper strap disposed on the lower base, the upper strap cooperating with the lower base to radially limit the gas cylinder; both ends of the upper strap are provided with movable portions; and an elastic compensation component disposed between the movable portions and the lower base, used to provide a force that pulls the movable portions closer to the lower base. This invention can adapt not only to gas cylinders of the same volume but different outer diameters, but also to gas cylinders of different volumes.

Description

Technical Field

[0001] This invention relates to the field of gas cylinder installation and fixing technology, and in particular to a modular gas cylinder fixing device and fixing method. Background Technology

[0002] Currently, the fixing structures for gas cylinders are becoming increasingly diverse, primarily due to the following two main reasons: First, gas cylinders of the same volume can vary in outer diameter due to differences in design, processes, and manufacturing between different manufacturers. This situation necessitates that the cylinder mounting structure be designed based on the dimensions of a single manufacturer's cylinders. Once the cylinder supplier changes, the original mounting structure becomes unsuitable. Furthermore, the diverse dimensional requirements of numerous manufacturers have given rise to various non-standard mounting devices, making it difficult to establish a unified modular design standard within the industry. This, in turn, reduces supply chain adaptability and on-site installation and maintenance efficiency.

[0003] Secondly, in existing technologies, most fixing devices are designed based on the outer diameter, which cannot achieve compatibility and adaptation of a single device to gas cylinders of multiple volume specifications. This incompatible design not only increases the repetitive costs of mold development and production process adjustment for fixing devices, but also further increases the warehousing management and replacement and adaptation costs of later operation and maintenance due to the wide variety of spare parts. Summary of the Invention

[0004] To address this issue, the present invention provides a modular gas cylinder fixing device and its fixing method. This device can not only adapt to gas cylinders of the same volume but different outer diameters, but also to gas cylinders of different volumes. By adjusting the upper strap and the support structure of the adaptive lower base, the gas cylinder is securely fixed. This solves the problem that differences in design, process, and manufacturing between different gas cylinder manufacturers result in different outer diameters for gas cylinders of the same volume, which means that hydrogen storage gas cylinder fixing devices can only be designed based on a single supplier and cannot adapt to the sizes of gas cylinders from different suppliers. It also solves the problem that when users select gas cylinders of different volumes, the gas cylinder fixing device can only be redesigned according to the gas cylinder volume size, and a single fixing device cannot be compatible with gas cylinders of multiple volumes.

[0005] To solve the above-mentioned technical problems, the present invention provides a modular gas cylinder fixing device, comprising: Lower base; An expansion device is disposed on the lower base. The expansion device includes a supporting arc plate, a support plate, and an elastic tension element. The arc surface of the supporting arc plate is used to support the gas cylinder. Two support plates are symmetrically disposed below the supporting arc plate along the center line of the supporting arc plate. One end of each support plate is rotatably connected to the supporting arc plate, and the other end of each support plate is slidably connected to the lower base. The elastic tension element is disposed between the two support plates to provide a force for them to move closer to each other. The arc surface can move downward relative to the lower base under the action of the gas cylinder's gravity. An upper strap is provided on the lower base. The upper strap cooperates with the lower base to radially limit the movement of the gas cylinder. Movable parts are provided at both ends of the upper strap. An elastic compensation component is disposed between the movable part and the lower base to provide a force for the movable part to move closer to the lower base; When the gas cylinder is heated and expands radially, the upper strap moves upward under the pressure of the gas cylinder and compresses the elastic compensation component; when the gas cylinder cools and contracts radially, the elastic compensation component releases elastic potential energy and drives the movable part to move the upper strap downward so that the upper strap continues to adhere to the outer wall of the gas cylinder.

[0006] In one embodiment of the invention, a pin and a torsion spring are also included. One end of each of the support plates is rotatably connected to the support arc plate via the pin. The torsion spring is sleeved on the pin and is used to provide a force that moves the two support plates away from each other.

[0007] In one embodiment of the present invention, the lower base is provided with a slide rail, and each of the support plates is provided with a sliding pin at the other end, the sliding pin being able to slide along the slide rail.

[0008] In one embodiment of the present invention, the elastic tension element includes a tension spring.

[0009] In one embodiment of the present invention, the lower base is provided with a receiving area, the cross-section of the receiving area includes a bottom edge and side edges that are symmetrically inclined outward along both ends of the bottom edge, and the expansion device is disposed on the bottom edge.

[0010] In one embodiment of the present invention, each of the said sides is provided with an inner rubber pad.

[0011] In one embodiment of the present invention, a lower rubber pad is provided on the arc surface of the supporting arc plate.

[0012] In one embodiment of the present invention, an upper rubber pad is provided on the inner side of the upper strap.

[0013] In one embodiment of the present invention, the elastic compensation component includes a fastening bolt, a spring, and a spring cover plate. The fastening bolt passes through and is movably connected to the wall of the lower base and is connected to the movable part. The spring cover plate is disposed at the bottom end of the fastening bolt. The spring is sleeved on the fastening bolt and its two ends abut against the spring cover plate and the wall of the lower base, respectively. When the gas cylinder is heated and expands radially, the upper strap is pressed by the gas cylinder, causing the movable part to move upward and compress the spring. When the gas cylinder cools down and contracts, the spring releases its elastic potential energy and drives the movable part, causing the upper strap to move downward, so that the upper strap continues to adhere to the outer wall of the gas cylinder.

[0014] The present invention also provides a modular gas cylinder fixing method, utilizing the aforementioned modular gas cylinder fixing device, the method comprising: Place the gas cylinder on the arc surface of the supporting arc plate of the expansion device; Under the influence of the gas cylinder's gravity, the supporting arc plate moves downward relative to the lower base, causing the two supporting plates to rotate around their rotational connection with the supporting arc plate. At the same time, the other end of each supporting plate slides relative to the sliding connection with the lower base, thereby enabling the expansion device to adaptively adjust according to the outer diameter of the gas cylinder. During the downward movement of the supporting arc plate, the elastic tension element between the two supporting plates is stretched and provides a pulling force that brings the two supporting plates closer together, so as to maintain the stability of the support for the gas cylinder. The upper strap is positioned above the gas cylinder, and the upper strap cooperates with the lower base to radially limit the gas cylinder. The elastic compensation component provides a force close to the lower base to the movable part, causing the upper strap to adhere to the outer wall of the gas cylinder and complete the fixation of the gas cylinder. When the gas cylinder expands radially due to heat, the upper strap is pressed by the top of the gas cylinder, causing the movable part to move upward and compressing the elastic compensation component; When the gas cylinder cools down and contracts radially, the elastic compensation component releases elastic potential energy and drives the movable part to move downward, so that the upper strap continues to adhere to the outer wall of the gas cylinder.

[0015] The technical solution of the present invention has the following advantages compared with the prior art: This invention discloses a modular gas cylinder fixing device and method that achieves coordinated upper and lower fixing of the gas cylinder through the cooperation of a lower expansion device and an upper binding strap. The lower expansion device supports and accommodates gas cylinders of different outer diameters, while the upper binding strap, in conjunction with the lower base, provides radial restraint to the gas cylinder, together forming a stable constraint on the cylinder. During installation, the gas cylinder, under its own weight, moves the supporting arc plate downwards, allowing the support plate to automatically adjust its position under the guidance of the sliding connection structure and maintain stable support under the action of the elastic tension element. Subsequently, the upper binding strap completes the radial restraint, not only achieving accurate support and positioning of the gas cylinder but also avoiding the problems of excessive localized stress, insufficient fit, or insufficient fixing stability that can easily occur when relying solely on the upper binding strap.

[0016] This invention solves the problem that differences in design, process and manufacturing among different gas cylinder manufacturers result in different outer diameters of gas cylinders of the same volume, which in turn means that hydrogen storage cylinder fixing devices can only be designed based on a single supplier and cannot be adapted to the gas cylinder sizes of different suppliers. This invention addresses the diverse needs of customers. When customers select gas cylinders of different volumes, the gas cylinder fixing device can only be redesigned and developed according to the gas cylinder volume size, and it is impossible to achieve the ability of a single fixing device to be compatible with gas cylinders of multiple sizes. Attached Figure Description

[0017] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a front view of the modular gas cylinder fixing device of the present invention.

[0019] Figure 2 This is an axonometric structural diagram of the modular gas cylinder fixing device of the present invention.

[0020] Figure 3 This is a partial structural diagram of the modular gas cylinder fixing device of the present invention.

[0021] Figure 4 This is a front view of the expansion device of the present invention.

[0022] Figure 5 This is an axial structural diagram of the expansion device of the present invention.

[0023] Figure 6 This is a schematic diagram of the installation of the fixing structure for gas cylinders of the same volume but different outer diameters according to the present invention.

[0024] Figure 7 This is a schematic diagram of the installation of the fixing structure for gas cylinders of different volumes according to the present invention.

[0025] Explanation of reference numerals in the instruction manual: 1. Lower base; 1-1. Slide rail; 2. Expansion device; 2-1. Arc surface; 2-2. Support plate; 2-3. Sliding pin; 2-4. Elastic tension element; 2-5. Torsion spring; 2-6. Shaft pin; 2-7. Supporting arc plate; 3. Lower rubber pad; 4. Inner rubber pad; 5a. Elastic compensation component; 5. Fastening bolt; 6. Spring; 7. Spring cover plate; 8. Upper strap; 8-1. Movable part; 9. Upper rubber pad; 10. Gas cylinder. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0027] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0028] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0030] Reference Figures 1 to 5 As shown, a modular gas cylinder fixing device of the present invention includes: Lower base 1; An expansion device 2 is disposed on the lower base 1. The expansion device 2 includes a supporting arc plate 2-7, a support plate 2-2, and an elastic tension element 2-4. The arc surface 2-1 of the supporting arc plate 2-7 is used to support the gas cylinder 10. Two support plates 2-2 are symmetrically arranged below the supporting arc plate 2-7 along the center line of the supporting arc plate 2-7. One end of each support plate 2-2 is rotatably connected to the supporting arc plate 2-7, and the other end of each support plate 2-2 is slidably connected to the lower base 1. The elastic tension element 2-4 is disposed between the two support plates 2-2 to provide a force for them to move closer to each other. The arc surface 2-1 can move downward relative to the lower base 1 under the action of the gravity of the gas cylinder 10. An upper strap 8 is provided on the lower base 1. The upper strap 8 cooperates with the lower base 1 to radially limit the gas cylinder 10. Movable parts 8-1 are provided at both ends of the upper strap 8. An elastic compensation component 5a is disposed between the movable part 8-1 and the lower base 1, for providing a force for the movable part 8-1 to move closer to the lower base 1; When the gas cylinder 10 expands radially due to heat, the upper strap 8 is pressed upward by the gas cylinder 10 and compresses the elastic compensation component 5a; when the gas cylinder 10 cools down and contracts radially, the elastic compensation component 5a releases elastic potential energy and drives the movable part 8-1, causing the upper strap 8 to move downward so that the upper strap 8 continues to adhere to the outer wall of the gas cylinder 10.

[0031] With the above configuration, by setting an expansion device 2 on the lower base 1 and causing the supporting arc plate 2-7 to move downward relative to the lower base 1 under the gravity of the gas cylinder 10, while simultaneously driving the two supporting plates 2-2 to rotate and slide, the expansion device 2 can automatically adjust its support position according to the actual outer diameter of the gas cylinder 10. This fixing device no longer relies on a fixing structure specifically designed for a single supplier and a single outer diameter size, but can adapt to gas cylinders 10 with the same volume but different outer diameters. It can effectively solve the problem in the prior art where differences in design, process, and manufacturing between different manufacturers lead to different outer diameters of gas cylinders 10 of the same specification, making the original fixing structure incompatible. This improves the compatibility of the fixing device with gas cylinders 10 from different suppliers and enhances the adaptability flexibility of the vehicle or hydrogen storage system during supply chain switching.

[0032] In one embodiment, one end of the support plate 2-2 is rotatably connected to the support arc plate 2-7 via the shaft pin 2-6, and the torsion spring 2-5 is sleeved on the shaft pin 2-6 to provide a force that keeps the two support plates 2-2 away from each other.

[0033] In one embodiment, the lower base 1 is provided with a slide rail 1-1, and each of the support plates 2-2 is provided with a sliding pin 2-3 at the other end, the sliding pin 2-3 being able to slide along the slide rail 1-1.

[0034] In one embodiment, the elastic tension element 2-4 includes a tension spring 6.

[0035] In one embodiment, the lower base 1 is provided with a receiving area, the cross-section of which includes a bottom edge and side edges that are symmetrically inclined outward along both ends of the bottom edge, and the expansion device 2 is disposed on the bottom edge.

[0036] In one embodiment, each of the sides is provided with an inner rubber pad 4.

[0037] In one embodiment, a lower rubber pad 3 is provided on the arc surface 2-1 of the supporting arc plate 2-7.

[0038] In one embodiment, an upper rubber pad 9 is provided on the inner side of the upper strap 8.

[0039] By having rubber pads in various positions contact the outer wall of the gas cylinder 10, the contact friction can be increased, improving the anti-slip ability of the gas cylinder 10 in a fixed state. On the other hand, it can also buffer the outer wall of the gas cylinder 10, reducing the risk of local indentation, wear and stress concentration.

[0040] In one embodiment, the elastic compensation component 5a includes a fastening bolt 5, a spring 6, and a spring cover plate 7. The fastening bolt 5 passes through and is movably connected to the wall of the lower base 1 and is connected to the movable part 8-1. The spring cover plate 7 is disposed at the bottom end of the fastening bolt 5. The spring 6 is sleeved on the fastening bolt 5 and its two ends abut against the spring cover plate 7 and the wall of the lower base 1, respectively. When the gas cylinder 10 is heated and expands radially, the upper strap 8 is pressed by the gas cylinder 10, causing the movable part 8-1 to move upward and compress the spring 6. When the gas cylinder 10 cools down and contracts, the spring 6 releases its elastic potential energy and drives the movable part 8-1, causing the upper strap 8 to move downward so that the upper strap 8 continues to adhere to the outer wall of the gas cylinder 10.

[0041] Specifically, refer to Figure 6 As shown, the installation process and working principle of gas cylinders 10 with the same volume but different outer diameters are as follows: Installation Procedure: First, install the lower rubber pad 3 and the inner rubber pad 4 onto the arc surface 2-1 of the expansion device 2 and the lower base 1, respectively. Then, install the gas cylinder 10 onto the expansion device 2. Under the weight of the gas cylinder 10, the arc surface 2-1 moves downward, thereby causing the left and right support plates 2-2 on the expansion device 2 to slide within the slide rail 1-1 of the lower base 1 via the sliding pin 2-3. Due to the tension of the tension spring 6 and the restraining effect of the lower base 1, the hydrogen storage cylinder 10 descends a certain distance and contacts the two inner rubber pads 4 on the lower base 1, forming a stable semi-enclosed space. Finally, the upper rubber pad 9, upper strap 8, and fastening bolt 5 are used to cooperate with the lower base 1 to fix the gas cylinder 10, forming a closed and fixed space.

[0042] Hydrogen-filled expansion state: When gas cylinder 10 is filled with hydrogen and heated, it will generate radial displacement. Since the surrounding structure is rigidly connected, the expansion displacement can be released by compressing the upper strap 8 upward. After the upper strap 8 is compressed, it compresses the spring 6, thereby absorbing the expansion displacement of gas cylinder 10 and avoiding structural damage.

[0043] Hydrogen release and contraction state: When gas cylinder 10 releases hydrogen and cools down, its diameter decreases. At this time, due to the release and displacement of spring 6, the upper strap 8 moves downward to ensure that it is always in contact with gas cylinder 10, maintaining a closed and fixed space and ensuring the stability of the fixation.

[0044] Reference Figure 7 As shown, the installation and working principle of gas cylinders 10 with the same volume but different outer diameters are as follows: The installation process and working principle of gas cylinders 10 with different volumes under hydrogen filling and discharging conditions are completely consistent with those of the gas cylinders 10 mentioned above. There is no need to adjust the core structure of the device. Stable fixation and displacement compensation can be achieved solely through the adaptability of the device itself.

[0045] It should be noted that the gas cylinder 10 first gradually contacts the inner rubber pad 4 with the cooperation of the expansion device 2 and the lower base 1, thus forming a stable semi-enclosed support state at the bottom; then, through the cooperation of the upper strap 8, the upper rubber pad 9, and the elastic compensation component 5a, a closed and fixed state is formed at the top. This allows the gas cylinder 10 to be relatively completely covered and limited after installation, which not only helps to improve the stability of the fixation, but also helps to reduce the risk of the gas cylinder 10 shifting, jumping, or moving under vibration, impact, and operating conditions. Compared with the traditional single clamp or rigid snap-fit ​​structure, the present invention has advantages in terms of overall support continuity and limiting integrity.

[0046] Furthermore, the hydrogen storage cylinder 10 typically expands radially due to temperature rise during hydrogen filling and contracts radially due to temperature drop during hydrogen release. Existing rigid clamping structures are prone to generating excessive compressive force during cylinder expansion, potentially damaging the straps, supports, or connectors. Conversely, cylinder contraction can lead to loosening due to increased gaps. This embodiment addresses this by providing an elastic compensation component 5a between the movable portion 8-1 of the upper strap 8 and the lower base 1. When the cylinder 10 expands radially due to heat, the upper strap 8 moves upward under the pressure of the cylinder 10, compressing the elastic compensation component 5a and releasing the expansion displacement. Conversely, when the cylinder 10 contracts radially due to temperature drop, the elastic compensation component 5a releases its elastic potential energy, pushing the movable portion 8-1 downward, ensuring the upper strap 8 remains in contact with the outer wall of the cylinder 10. This dynamic compensation for the thermal expansion and contraction of the cylinder 10 prevents structural failure due to dimensional changes, significantly improving long-term reliability and safety.

[0047] Furthermore, the elastic compensation component 5a continuously applies a force close to the lower base 1 to the movable part 8-1, ensuring that the upper strap 8 always tends to press against the outer wall of the gas cylinder 10. Therefore, even if the gas cylinder 10 undergoes slight dimensional changes due to temperature variations, vibration, assembly errors, or long-term use, the upper strap 8 can still maintain a continuous fit with the outer wall of the gas cylinder 10 under the action of the elastic compensation component 5a, avoiding problems such as increased gaps, strap suspension, or insufficient clamping force. The expansion device 2 utilizes the weight of the gas cylinder 10 to drive the movement of the supporting arc plate 2-7, the supporting plate 2-2, and the sliding connection structure, thereby automatically adapting to the outer diameter of the gas cylinder 10, eliminating the need for complex manual adjustments to the bottom support structure before installation.

[0048] This embodiment also provides a modular gas cylinder fixing method, utilizing the modular gas cylinder 10 fixing device, the method comprising: S1. Place the gas cylinder 10 on the arc surface 2-1 of the supporting arc plate 2-7 of the expansion device 2; S2. Under the gravity of the gas cylinder 10, the supporting arc plate 2-7 moves downward relative to the lower base 1, and drives the two supporting plates 2-2 to rotate around the rotational connection between them and the supporting arc plate 2-7. At the same time, the other end of each supporting plate 2-2 slides relative to the sliding connection of the lower base 1, so that the expansion device 2 can adaptively adjust according to the outer diameter of the gas cylinder 10. S3. During the downward movement of the supporting arc plate 2-7, the elastic tension element 2-4 between the two supporting plates 2-2 is stretched and provides a pulling force that brings the two supporting plates 2-2 closer to each other to maintain the support stability of the gas cylinder 10. S4. Place the upper strap 8 above the gas cylinder 10 and make the upper strap 8 cooperate with the lower base 1 to radially limit the gas cylinder 10. S5. Through the elastic compensation component 5a, a force is provided to the movable part 8-1 close to the lower base 1, so that the upper strap 8 fits against the outer wall of the gas cylinder 10 and completes the fixation of the gas cylinder 10. S6. When the gas cylinder 10 is heated and expands radially, the upper strap 8 is pressed by the gas cylinder 10 and drives the movable part 8-1 to move upward, and compresses the elastic compensation component 5a. S7. When the gas cylinder 10 cools down and contracts radially, the elastic compensation component 5a releases elastic potential energy and drives the movable part 8-1 to move downward, so that the upper strap 8 continues to adhere to the outer wall of the gas cylinder 10.

[0049] Through the adaptive support of the lower expansion device 2 and the cooperating clamping of the upper strap 8 and the elastic compensation component 5a, the fixing device can be compatiblely installed on gas cylinders 10 of different volumes while maintaining the core structure unchanged. This significantly reduces the need for repeated development of fixing devices for gas cylinders 10 of different volumes, reduces product development cycle and manufacturing costs, and also reduces the number of spare parts models, facilitating later operation, maintenance, warehousing and replacement management.

[0050] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A modular gas cylinder fixing device, characterized in that, include: Lower base (1); An expansion device (2) is disposed on the lower base (1). The expansion device (2) includes a supporting arc plate (2-7), a support plate (2-2), and an elastic tension element (2-4). The arc surface (2-1) of the supporting arc plate (2-7) is used to support the gas cylinder (10). The two support plates (2-2) are symmetrically disposed below the supporting arc plate (2-7) along the center line of the supporting arc plate (2-7). One end of each support plate (2-2) is rotatably connected to the supporting arc plate (2-7), and the other end of each support plate (2-2) is slidably connected to the lower base (1). The elastic tension element (2-4) is disposed between the two support plates (2-2) to provide a force for them to move closer to each other. The arc surface (2-1) can move downward relative to the lower base (1) under the gravity of the gas cylinder (10). The upper strap (8) is set on the lower base (1). The upper strap (8) cooperates with the lower base (1) to radially limit the gas cylinder (10). The two ends of the upper strap (8) are provided with movable parts (8-1). An elastic compensation component (5a) is disposed between the movable part (8-1) and the lower base (1) for providing a force for the movable part (8-1) to approach the lower base (1); When the gas cylinder (10) expands radially due to heat, the upper strap (8) moves upward under the pressure of the gas cylinder (10) and compresses the elastic compensation component (5a); when the gas cylinder (10) cools down and contracts radially, the elastic compensation component (5a) releases elastic potential energy and drives the movable part (8-1), causing the upper strap (8) to move downward so that the upper strap (8) continues to adhere to the outer wall of the gas cylinder (10).

2. The modular gas cylinder fixing device according to claim 1, characterized in that, It also includes a pivot pin (2-6) and a torsion spring (2-5). One end of each of the support plates (2-2) is rotatably connected to the support arc plate (2-7) through the pivot pin (2-6). The torsion spring (2-5) is sleeved on the pivot pin (2-6) and is used to provide a force that moves the two support plates (2-2) away from each other.

3. The modular gas cylinder fixing device according to claim 1, characterized in that, The lower base (1) is provided with a slide rail (1-1), and each of the support plates (2-2) is provided with a sliding pin (2-3) at the other end. The sliding pin (2-3) can slide along the slide rail (1-1).

4. The modular gas cylinder fixing device according to claim 1, characterized in that, The elastic tension element (2-4) includes a tension spring (6).

5. A modular gas cylinder fixing device according to claim 1, characterized in that, The lower base (1) is provided with a receiving area. The cross-section of the receiving area includes a bottom edge and side edges that are symmetrically inclined outward along both ends of the bottom edge. The expansion device (2) is provided on the bottom edge.

6. A modular gas cylinder fixing device according to claim 5, characterized in that, Each of the aforementioned sides is provided with an inner rubber pad (4).

7. A modular gas cylinder fixing device according to claim 1, characterized in that, A lower rubber pad (3) is provided on the arc surface (2-1) of the supporting arc plate (2-7).

8. A modular gas cylinder fixing device according to claim 1, characterized in that, The upper strap (8) has an upper rubber pad (9) on its inner side.

9. A modular gas cylinder fixing device according to claim 1, characterized in that, The elastic compensation component (5a) includes a fastening bolt (5), a spring (6), and a spring cover plate (7). The fastening bolt (5) passes through and is movably connected to the wall of the lower base (1) and is connected to the movable part (8-1). The spring cover plate (7) is disposed at the bottom end of the fastening bolt (5). The spring (6) is sleeved on the fastening bolt (5) and its two ends abut against the spring cover plate (7) and the wall of the lower base (1), respectively. When the gas cylinder (10) is heated and expands radially, the upper strap (8) is pressed by the gas cylinder (10) to move the movable part (8-1) upward and compress the spring (6). When the gas cylinder (10) cools down and contracts, the spring (6) releases elastic potential energy and drives the movable part (8-1) to move the upper strap (8) downward so that the upper strap (8) continues to adhere to the outer wall of the gas cylinder (10).

10. A modular gas cylinder fixing method, characterized in that, The method, using the modular gas cylinder (10) fixing device according to any one of claims 1-9, comprises: Place the gas cylinder (10) on the arc surface (2-1) of the supporting arc plate (2-7) of the expansion device (2); Under the gravity of the gas cylinder (10), the supporting arc plate (2-7) moves downward relative to the lower base (1) and drives the two supporting plates (2-2) to rotate around the rotational connection between them and the supporting arc plate (2-7). At the same time, the other end of each supporting plate (2-2) slides relative to the sliding connection of the lower base (1), thereby enabling the expansion device (2) to adaptively adjust according to the outer diameter of the gas cylinder (10). During the downward movement of the supporting arc plate (2-7), the elastic tension element (2-4) between the two supporting plates (2-2) is stretched and provides a pulling force that brings the two supporting plates (2-2) closer to each other to maintain the support stability of the gas cylinder (10). The upper strap (8) is placed above the gas cylinder (10), and the upper strap (8) cooperates with the lower base (1) to radially limit the gas cylinder (10); The elastic compensation component (5a) provides a force close to the lower base (1) to the movable part (8-1), so that the upper strap (8) fits against the outer wall of the gas cylinder (10) and completes the fixation of the gas cylinder (10); When the gas cylinder (10) is heated and expands radially, the upper strap (8) is pressed by the gas cylinder (10) and drives the movable part (8-1) to move upward, and compresses the elastic compensation component (5a); When the gas cylinder (10) cools down and contracts radially, the elastic compensation component (5a) releases elastic potential energy and drives the movable part (8-1) to move downward, so that the upper strap (8) continues to adhere to the outer wall of the gas cylinder (10).

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