Gas cylinder

Abstract

The utility model provides a gas cylinder, and belongs to the technical field of beverage equipment. The problem of how to ensure the reliability of the gas cylinder structure while reducing the cost of the gas cylinder is solved. The gas cylinder comprises a plastic bottle body and a bottle cap provided with a gas valve, an annular connecting edge is arranged at the upper end of the plastic bottle body, the bottle cap comprises an annular turnup with an inverted-U-shaped vertical section, the turnup sleeves the connecting edge, the edge of the lower end of the turnup located on the outer side of the connecting edge is bent inwards in the radial direction to form a closed-up shape, and the gas valve is arranged in the closed-up shape. And the clamping ring is buckled on the connecting edge and tightly holds the connecting edge. The gas cylinder adopts the plastic bottle body, not only is the manufacturing cost low, but also the bottle cap turnup and the bottle body connecting edge are reliably connected and have good sealing performance through the matched improved design of the bottle cap turnup and the bottle body connecting edge, so that the gas cylinder structure has very high reliability.

Description

Technical Field

[0001] This utility model belongs to the field of beverage equipment technology and relates to a gas cylinder. Background Technology

[0002] A beverage dispenser is a device used to dispense beverages (such as beer, coffee, and soda) from beverage containers. It is commonly used in commercial settings such as bars and cafes, as well as in home settings like parties. Users can quickly dispense beverages using a beverage dispenser. A beverage dispenser includes a beverage container, a dispenser, and a tap. To ensure the beverage can be dispensed from the container, a high-pressure gas, such as carbon dioxide, is typically filled into the container to apply pressure to the beverage, forcing it out of the container.

[0003] Currently, to prevent insufficient gas pressure in beverage containers, gas pressurization devices are typically installed inside the containers for gas compensation and pressurization. Existing gas pressurization devices include gas cylinders for providing the gas source. To provide sufficient gas pressure inside the container, these cylinders are generally filled with high-pressure gas. To ensure the reliability of the gas cylinders and prevent high-pressure gas leakage, the cylinders are generally made of metal, with the cap directly riveted to the cylinder body. However, the manufacturing cost of such metal cylinders is relatively high, which is not conducive to cost control. Therefore, those skilled in the art may consider using plastic cylinders instead of metal cylinders to reduce costs; however, in practical applications, it has been found that if the cap is still directly riveted to the plastic cylinder body, this connection structure is insufficient to guarantee the reliability of the cylinder structure. Once the gas pressure is too high, the plastic cylinder body will deform to a certain extent, and the connection between the cap and the plastic cylinder body can easily detach, causing leakage or rupture, rendering the cylinder unusable. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a gas cylinder. The technical problem to be solved by this utility model is how to reduce the cost of the gas cylinder while ensuring the reliability of the gas cylinder structure.

[0005] The purpose of this utility model can be achieved through the following technical solution: a gas cylinder, including a plastic bottle body and a bottle cap equipped with a gas valve, wherein the upper end of the plastic bottle body has an annular connecting edge, and the bottle cap includes an annular flange with an inverted U-shaped vertical cross section, the flange being fitted onto the connecting edge, characterized in that the lower edge of the flange located outside the connecting edge is bent radially inward to form a constricted opening, and is fastened to the connecting edge and tightly hugs the connecting edge.

[0006] This invention is an improvement on existing metal gas cylinders. It reduces costs by replacing the cylinder body with a plastic one, and improves the connection structure between the cap and the cylinder body to ensure the reliability of the cylinder structure after the plastic body is used. Specifically, the lower edge of the U-shaped flange on the outer side of the cap is bent radially inward. This design allows the cap to fasten and hold the connection edge tightly. When high-pressure gas pushes the cap outward, the bending and holding design prevents the connection between the cap and the cylinder body from easily detaching, thus ensuring a reliable connection and guaranteeing the reliability of the gas cylinder structure.

[0007] In the aforementioned gas cylinder, the flange located on the inner side of the connecting edge is bent radially outward and abuts against and tightens the connecting edge. This radial outward bending design of the flange on the inner side of the connecting edge allows the cap to tighten against the connecting edge. When high-pressure gas pushes the cap outward, the cap's tightening design prevents it from easily detaching from the cylinder body. Furthermore, combined with the aforementioned bending and clamping design, the cap, through the simultaneous action of the inward and outward bending on both sides of the flange, securely fastens to the connecting edge, further ensuring the reliability of the gas cylinder structure.

[0008] In the aforementioned gas cylinder, the vertical cross-section of the flange located inside the connecting edge is S-shaped, forming an acute angle with the inner wall of the plastic cylinder. This design ensures that when high pressure acts on the flange within the cylinder, it generates a radially outward force, resulting in a stronger connection between the flange and the connecting edge, thus further guaranteeing the reliability of the gas cylinder structure. It should also be noted that the term "S-shape" does not simply refer to a single S-shape, but also includes shapes similar to an S-shape and shapes resembling an inverted S-shape.

[0009] In the aforementioned gas cylinder, the upper surface of the connecting edge is an arc surface, and a sealing cavity is formed between the connecting edge and the flange. A sealing gasket with a matching shape is embedded in the sealing cavity. Through this design, the sealing gasket fills the sealing cavity, thereby improving the sealing performance between the connecting edge and the flange, helping to prevent leakage after high-pressure gas is filled, and thus ensuring the reliability of the gas cylinder structure.

[0010] In the aforementioned gas cylinder, the wall thickness of the plastic bottle body is greater than the wall thickness of the cap. The cap used in this case is an existing cap made of metal, which has relatively high strength. However, since the bottle body is made of plastic instead of metal, the aforementioned thickness design helps to improve the strength of the plastic bottle body, making it less prone to deformation after inflation, thereby improving the reliability of the gas cylinder structure.

[0011] Compared with existing technologies, this gas cylinder has the following advantages: This gas cylinder uses a plastic body, which not only has low manufacturing cost, but also improves the design of the fit between the cap flange and the connecting edge of the cylinder body, making the connection between the two reliable and the sealing good, so that the gas cylinder structure has high reliability. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the gas cylinder.

[0013] Figure 2 This is a cross-sectional view of the upper part of the gas cylinder.

[0014] Figure 3 This is a magnified view of a portion of point A in the diagram.

[0015] In the diagram, 1 is the plastic bottle body; 11 is the connecting edge; 2 is the air valve; 3 is the bottle cap; 31 is the flange; 4 is the sealing cavity; and 5 is the sealing gasket. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] Specifically, such as Figure 1 As shown, this gas cylinder includes a plastic bottle body 1 and a cap 3 made of metal material, which is equipped with a gas valve 2. (As shown...) Figure 2 As shown, the wall thickness of the plastic bottle body 1 is greater than the wall thickness of the bottle cap 3. The upper end of the plastic bottle body 1 has an annular connecting edge 11. The bottle cap 3 includes an annular flange 31 with an inverted U-shaped vertical cross-section, and the flange 31 is fitted onto the connecting edge 11. Figure 3 As shown, the upper surface of the connecting edge 11 is an arc surface, and a sealing cavity 4 is formed between the connecting edge 11 and the flange 31. A sealing gasket 5 with a matching shape is embedded in the sealing cavity 4. The lower edge of the flange 31 located on the outer side of the connecting edge 11 is bent radially inward to form a constricted shape, and it fastens and hugs the connecting edge 11 on the lower side, and is also in contact with the connecting edge 11. The flange 31 located on the inner side of the connecting edge 11 is bent radially outward, and it abuts against the lower side of the connecting edge 11 and supports the connecting edge 11. More specifically, the vertical cross-section of the flange 31 located on the inner side of the connecting edge 11 is S-shaped, and it forms an acute angle with the inner wall of the plastic bottle body 1.

[0018] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0019] Although this document frequently uses terms such as plastic bottle body 1, connecting edge 11, valve 2, cap 3, flange 31, sealing cavity 4, and sealing gasket 5, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A gas cylinder comprising a plastic bottle body (1) and a cap (3) equipped with a gas valve (2), wherein the upper end of the plastic bottle body (1) has an annular connecting edge (11), and the cap (3) includes an annular flange (31) with an inverted U-shaped vertical cross-section, the flange (31) being fitted onto the connecting edge (11), characterized in that, The lower edge of the flange (31) located outside the connecting edge (11) bends radially inward to form a closed shape, and fastens to the connecting edge (11) and hugs the connecting edge (11).

2. The gas cylinder of claim 1, wherein The flange (31) located inside the connecting edge (11) bends outward radially and abuts against the connecting edge (11) and tightens the connecting edge (11).

3. The gas cylinder of claim 2, wherein The vertical cross section of the flange (31) located inside the connecting edge (11) is S-shaped and forms an angle with the inner wall of the plastic bottle (1), and the angle is acute.

4. The gas cylinder according to any one of claims 1 or 2 or 3, characterized in that, The upper surface of the connecting edge (11) is an arc surface, and a sealing cavity (4) is formed between the connecting edge (11) and the flange (31). A sealing gasket (5) with a matching shape is embedded in the sealing cavity (4).

5. The gas cylinder according to any one of claims 1 or 2 or 3, characterized in that, The wall thickness of the plastic bottle body (1) is greater than the wall thickness of the bottle cap (3).

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