High-pressure gas cylinder

Abstract

The utility model discloses a high-pressure gas cylinder which comprises a metal inner container, and the metal inner container is provided with a containing cavity used for containing high-pressure gas. The fiber shell is wound on the outer surface of the metal inner container with preset tension; the protective shell is provided with a nest cavity for containing the metal inner container and the fiber shell, and one side of the nest cavity is provided with an opening; and the base is connected to the protective shell and is used for sealing the opening of the nest cavity. By arranging the fiber shell and the protection shell, the double-layer supporting strength effect on the metal inner container is achieved, and the position, in the protection shell, of the metal inner container is supported and positioned while the protection shell is sealed through the combination of the base and the bearing.

Description

Technical Field

[0001] The present application relates to the technical field of high-pressure containers, and in particular to a high-pressure gas cylinder. Background Art

[0002] High-pressure gas cylinders are containers specifically designed for storing high-pressure gases. To ensure safety during use and transportation, they are typically made of steel or other metals, resulting in a certain weight. To withstand sudden impacts during transportation and use, or to improve their resistance to shock, existing cylinders must be strengthened. This often involves increasing the cylinder's thickness, which increases the overall cost and weight of the cylinder. Utility Model Content

[0003] In order to reduce the mass of the steel cylinder while ensuring its strength, the present application provides a high-pressure gas cylinder.

[0004] The high-pressure gas cylinder provided in this application adopts the following technical solution:

[0005] A high-pressure gas cylinder, comprising:

[0006] A metal liner having a cavity for containing high-pressure gas;

[0007] A fiber shell is wound around the outer surface of the metal liner with a predetermined tension;

[0008] A protective shell having a cavity for accommodating the metal liner and the fiber shell, wherein one side of the cavity is open; and

[0009] The base is connected to the protective shell and is used to close the opening of the socket cavity.

[0010] By adopting the above technical solution, the fiber shell serves as the first layer of support and protection for the metal liner, strengthening the entire metal liner. At the same time, the protective shell is used as a secondary support and protection measure for the metal liner, further improving the strength of the entire cylinder.

[0011] Preferably, the fiber shell is any one of a Kevlar fiber shell, a basalt fiber shell, a carbon fiber shell and a glass fiber shell.

[0012] By adopting the above technical solution, most of the fiber materials used have the characteristics of high strength, light weight and certain toughness, and can be effectively attached to the surface of the metal liner through a winding process. When the process is mature, the thickness of the fiber shell after winding can also be set according to actual needs.

[0013] Preferably, the base is connected to the protective shell by snap-fitting or by fasteners.

[0014] By adopting the above technical solution, the metal liner enters the cavity from the opening of the protective shell, and the base serves as a component for closing the cavity, and is easy to operate by adopting a snap-on or fastener connection form.

[0015] Preferably, it also includes:

[0016] A support, the support being snap-connected to one end of the protective shell to close the cavity;

[0017] Wherein, the base has a receiving groove, the support is placed in the receiving groove, and the base is connected to the protective shell.

[0018] By adopting the above technical solution, the support serves as a component of the first layer of closed cavity to support the metal liner. At the same time, the support is also connected to the base. After the base is connected to the protective shell, the entire metal liner has a double-layer support and limiting effect.

[0019] Preferably, the support comprises:

[0020] a side wall, wherein the side wall is provided with a groove; and

[0021] A support body is connected to the side wall and extends toward one side of the base;

[0022] The bottom of the metal liner is in contact with the support body, and the protective shell is provided with a protrusion on the inner wall of the opening, and the protrusion is clamped in the groove.

[0023] By adopting the above technical solution, the connection between the support and the protective shell adopts a snap-fit structure of grooves and protrusions, and the connection operation is simple.

[0024] Preferably, the groove is an annular groove.

[0025] By adopting the above technical solution, the provision of the annular groove can improve the connection strength with the protective shell.

[0026] Preferably, at least one outwardly extending support rib is provided on the support body; when the support is connected to the protective shell, the bottom of the metal liner contacts the support rib, and there is a distance between the bottom of the metal liner and the support to form a first filling cavity.

[0027] By adopting the above technical solution, the raised support frame is set so that after it collides with the metal liner, the metal liner can be suspended in the support to form a first filling cavity. The setting of the support ribs not only improves the strength of the entire support, but also serves as an adjustment component for the relative position between the metal liner and the protective shell.

[0028] Preferably, a second filling cavity is provided between the support and the base.

[0029] By adopting the above technical solution, the second filling cavity can be formed as a floating space for elastic deformation of the protective shell, protecting the internal metal liner with an effect similar to that of an airbag.

[0030] Preferably, the first filling cavity and / or the second filling cavity is filled with polyurethane glue.

[0031] By adopting the above technical solution, the polyurethane glue in the filling cavity is injected to strengthen the connection strength between the metal liner and the protective shell, so that the relative movement of the metal liner in the protective shell is reduced.

[0032] Preferably, the protective shell is provided with a first packing groove and a second packing groove spaced apart along the vertical height on the outer wall.

[0033] By adopting the above technical solution, the opening of two packing grooves facilitates the positioning of the packing belts during the transportation of multiple cylinders, and the packing grooves arranged upper and lower can enable the two packing belts to be distributed up and down to improve the fixing effect on the cylinders.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. The fiber shell and the protective shell provide a double-layer support for the metal liner. The base and the support seal the protective shell while supporting the metal liner in the protective shell.

[0036] 2. The clamping structure between the support and the protective shell can quickly achieve sealing. At the same time, combined with the setting of the supporting ribs, a first filling cavity is formed between the metal liner, and the support is connected to the base and a second filling cavity is formed with a distance between the two. This makes the bottom of the cylinder have a certain deformation ability to resist and absorb impact. After polyurethane glue is injected into the first filling cavity and the second filling cavity, the connection strength between the metal liner and the protective shell is strengthened, reducing the movement of the cylinder in the protective shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is an overall schematic diagram of the high-pressure gas cylinder in Example 1;

[0038] Figure 2 This is an exploded schematic diagram of the high-pressure gas cylinder in Example 1 at one viewing angle;

[0039] Figure 3 This is an exploded schematic diagram of the high-pressure gas cylinder in Example 1 from another perspective;

[0040] Figure 4 is a cross-sectional view of the high-pressure gas cylinder in Example 1;

[0041] Figure 5 for Figure 4A magnified view of part A;

[0042] Figure 6 This is a schematic diagram of the connection between the fiber shell and the metal liner in Example 1.

[0043] Explanation of the accompanying drawings: 1. Metal liner; 11. Cavity; 12. Mouth; 2. Fiber shell; 3. Protective shell; 31. Socket; 32. Mounting hole; 33. Protrusion; 34. First packing groove; 35. Second packing groove; 4. Base; 41. Receiving groove; 42. Limiting groove; 43. Reinforcing rib; 5. Support; 51. Side wall; 511. Groove; 52. Support body; 53. Support rib; 54. Groove; 6. First filling cavity; 7. Second filling cavity; 8. Valve cover; 9. Fastener. DETAILED DESCRIPTION

[0044] The present application is further described in detail below with reference to the accompanying drawings.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example 1

[0047] Figures 1 to 3 The structure of the high-pressure gas cylinder in the first embodiment of the present invention is shown, including a metal liner 1. The metal liner 1 is roughly cylindrical and has a cavity 11 inside. Gas is filled into the cavity 11 at a certain pressure value. The metal liner 1 is made of stainless steel or a lightweight alloy. One end of the metal liner 1 is sealed by a necking process, and the other end is machined to form a mouth 12 for assembling the valve body.

[0048] Combine Figure 6The outer surface of the metal liner 1 is covered with a fiber shell 2, which serves as a supporting and reinforcing component of the metal liner 1. The fiber shell 2 in this embodiment is made of any one of Kevlar fiber, basalt fiber, carbon fiber, and glass fiber. It is wound around the outer surface of the metal liner 1 in a predetermined direction, angle, and tension, giving the metal liner 1 good compressive strength.

[0049] The high-pressure gas cylinder in this embodiment also includes a protective shell 3, which has a cavity 31 with an opening on one side. After being connected to the fiber shell 2, the metal liner 1 enters from the side opening of the cavity 31 and is completely accommodated in the cavity 31. The protective shell 3 is provided with a mounting hole 32 at one end that communicates with the cavity 31. The mouth 12 of the metal liner 1 extends from the cavity 31 and out of the mounting hole 32, and is connected to the external valve cover 8 by a threaded connection.

[0050] The protective shell 3 is made of a thermoplastic material with a certain elasticity level, capable of absorbing external loads and protecting the internal metal liner 1. A support 5 and a base 4 are connected to the bottom of the protective shell 3 to close the opening of the cavity 31 and support and position the metal liner 1.

[0051] Combine Figure 4 and Figure 5 The support 5 and the base 4 are both made of a thermoplastic material with a certain elasticity level. The support 5 includes an annular sidewall 51 and a support body 52 connected to the sidewall 51. The support body 52 is convex toward one side, and at least one support rib 53 is provided on the inner concave surface of the support body 52. In this embodiment, two support ribs are provided, spaced apart. The sidewall 51 has a groove 511 on its outer surface. In this embodiment, the groove 511 is an annular groove 511, but it can also be a groove 511 segment with a certain curvature. The protective shell 3 has a protrusion 33 on the inner surface of the cavity 31 near the opening. The support 5 is connected to the protective shell 3 through the engagement between the annular groove 511 and the protrusion 33.

[0052] When the support 5 is connected to the protective shell 3, the bottom of the metal liner 1 contacts the support rib 53. The support rib 53 suspends the metal liner 1 in the support body 52 to form a first filling cavity 6 between the two. Polyurethane glue is injected into the first filling cavity 6 to enable the metal liner 1, the support 5 and the protective shell 3 to be fixedly connected.

[0053] The base 4 has a receiving groove 41, and the support body 52 is protruded toward one side of the receiving groove 41 of the base 4. The base 4 also has a limiting groove 42 that connects to the receiving groove 41. When the support 5 is connected to the base 4, the support body 52 extends into the receiving groove 41, and the bottom of the side wall 51 abuts against the limiting groove 42, and the two are engaged. At the same time, a gap is formed between the outer surface of the support body 52 and the groove wall of the receiving groove 41 to form a second filling cavity 7. Furthermore, the outer surface of the support body 52 has a groove 54 at the position of the support rib 53, which increases the volume of the second filling cavity 7 while reducing the weight of the entire support 5. Similarly, polyurethane glue is injected into the second filling cavity 7 to further enhance the connection strength between the support 5 and the base 4.

[0054] The base 4 is also connected to the protective shell 3. The lower edge of the protective shell 3 can be snapped into the retaining groove 42, and the base 4, protective shell 3, and support 5 are further fixed together by fasteners 9. To reduce the overall mass, the base 4 has a hollow area at the bottom, and multiple reinforcing ribs are evenly distributed around the circumference of the hollow area.

[0055] In this embodiment, in order to facilitate the transportation of steel cylinders, the protective shell 3 is provided with a first packing groove 34 and a second packing groove 35 distributed upper and lower on the outer surface. After multiple steel cylinders are arranged with each other, the packing belt can be embedded and limited in the first packing groove 34 and the second packing groove 35. The first packing groove 34 and the second packing groove 35 are annularly opened on the outer surface of the protective shell 3 and are spaced apart in the vertical direction, so that multiple steel cylinders can be stably transported in an upright form. Example 2

[0056] A high-pressure gas cylinder differs from the first embodiment in that the support 5 is eliminated, the bottom of the metal liner 1 abuts against the receiving groove 41 of the base 4, and the base 4 is connected to the protective shell 3 using fasteners 9. Of course, the base 4 can also be connected to the protective shell 3 by a snap-fit form. A specific method is that the base 4 is provided with an annular groove on the inner surface, and the protective shell 3 is provided with an annular protrusion 33 on the outer surface, and the annular protrusion 33 is snap-fitted with the annular groove.

[0057] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A high-pressure gas cylinder, characterized in that: include: A metal liner (1), wherein the metal liner (1) has a cavity (11) for containing high-pressure gas; A fiber shell (2) is wound around the outer surface of the metal liner (1) at a predetermined tension; A protective shell (3), the protective shell (3) having a cavity (31) for accommodating the metal liner (1) and the fiber shell (2), one side of the cavity (31) being open; as well as The base (4) is connected to the protective shell (3) and is used to close the opening of the socket cavity (31).

2. The high-pressure gas cylinder according to claim 1, characterized in that: The fiber shell (2) is any one of a Kevlar fiber shell, a basalt fiber shell, a carbon fiber shell, and a glass fiber shell.

3. The high-pressure gas cylinder according to claim 1, characterized in that: The base (4) is connected to the protective shell (3) by snapping or by fasteners (9).

4. The high-pressure gas cylinder according to claim 1, characterized in that: Also includes: A support (5), the support (5) being snap-connected to one end of the protective shell (3) to close the cavity (31); The base (4) has a receiving groove (41), the support (5) is placed in the receiving groove (41), and the base (4) is connected to the protective shell (3).

5. The high-pressure gas cylinder according to claim 4, characterized in that: The support (5) comprises: A side wall (51), wherein the side wall (51) is provided with a groove (511); and A support body (52) is connected to the side wall (51) and extends and protrudes toward one side of the base (4); The bottom of the metal liner (1) contacts the support body (52), and the protective shell (3) is provided with a protrusion (33) on the inner wall of the opening, and the protrusion (33) is clamped in the groove (511).

6. The high-pressure gas cylinder according to claim 5, characterized in that: The groove (511) is an annular groove (511).

7. The high-pressure gas cylinder according to claim 5, characterized in that: At least one outwardly extending support rib (53) is provided on the support body (52); when the support (5) is connected to the protective shell (3), the bottom of the metal liner (1) contacts the support rib (53), and a gap is formed between the bottom of the metal liner (1) and the support (5) to form a first filling cavity (6).

8. The high-pressure gas cylinder according to claim 7, characterized in that: A second filling cavity (7) is provided between the support (5) and the base (4).

9. The high-pressure gas cylinder according to claim 8, characterized in that: The first filling cavity (6) and / or the second filling cavity (7) are filled with polyurethane glue.

10. The high-pressure gas cylinder according to claim 1, characterized in that: The protective shell (3) is provided with a first packing groove (34) and a second packing groove (35) spaced apart along the vertical height on the outer wall.

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