Bottle body structure of high-pressure gas cylinder

Abstract

The utility model provides a bottle body structure of a high-pressure gas bottle, and belongs to the technical field of wine drinking equipment. The technical problem that an existing high-pressure gas cylinder is difficult to consider low manufacturing cost and good pressure resistance at the same time is solved. The bottle body structure of the high-pressure gas bottle comprises a bottle body and a bottle neck which are integrally formed by plastic materials, the bottle neck is cylindrical, the middle of the bottle body is cylindrical, the top of the bottle body is in an arc-shaped closing-up shape, and an annular flange arranged in the circumferential direction is integrally formed on the outer wall of the lower end of the bottle neck. The annular flange is of an upper and lower double-layer wall structure, an annular groove seam is formed between the upper and lower double-layer walls, and a plurality of protrusions integrally formed on the outer wall of the bottle neck are arranged in the annular groove seam. According to the high-pressure gas cylinder, through optimization of the shape and selection of plastic materials, the high-pressure gas cylinder has the multiple advantages of being low in manufacturing cost, small in size and good in pressure resistance.

Description

Technical Field

[0001] This utility model belongs to the technical field of beverage drinking equipment, and relates to the bottle structure of a high-pressure gas cylinder. Background Technology

[0002] A beverage barrel is a container used to hold beverages such as beer. Typically, a dispensing nozzle is installed at the opening of the barrel, which works in conjunction with a dispenser to dispense the beverage. With the development of beverage dispensing equipment technology, a dispensing device was invented that embeds a high-pressure gas cylinder inside the beverage barrel. This device uses the high-pressure gas cylinder to release gas into the barrel, causing the beverage to flow out under gas pressure through a dispensing pipe, the nozzle, and the dispenser for consumption.

[0003] For example, a beverage barrel disclosed in patent literature (application number: 202410037824.X) includes a barrel body and a piston sleeve fixed inside the barrel body. A dispensing valve is connected to the barrel body's opening, and a liquid outlet pipe extending to the bottom of the barrel's inner cavity is connected to the dispensing valve. A gas cylinder with a gas cylinder valve is connected to the piston sleeve, which releases gas into the barrel body when the gas cylinder valve is opened. This gas cylinder has a conventional structure and suffers from the following drawbacks: Due to the limited space inside the beverage barrel, and to ensure that a large amount of beverage can be stored inside, the volume of the high-pressure gas cylinder cannot be made too large. At the same time, because the high-pressure gas cylinder needs to withstand high pressure, in order to withstand high gas pressure with a small volume and ensure that the high-pressure gas cylinder can store a large amount of gas, the conventional high-pressure gas cylinder body is made of metal materials such as aluminum. This results in high manufacturing costs and heavy weight, making it inconvenient to use. Therefore, current manufacturing technology for high-pressure gas cylinders inside beverage barrels has always faced a technical bottleneck in balancing low manufacturing costs and good pressure resistance. Summary of the Invention

[0004] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a cylinder structure for high-pressure gas cylinders. The technical problem solved by this utility model is to resolve the difficulty in balancing low manufacturing cost and high pressure resistance in existing high-pressure gas cylinders.

[0005] The objective of this utility model can be achieved through the following technical solution: a cylinder body structure for a high-pressure gas cylinder, comprising a cylinder body and a neck integrally formed from plastic material, characterized in that the neck is cylindrical, the middle part of the cylinder body is cylindrical and the top is arc-shaped, and an annular flange integrally formed on the outer wall of the lower end of the neck is arranged circumferentially, the annular flange has a double-wall structure with an annular groove between the upper and lower double walls, and the annular groove has a plurality of protrusions integrally formed on the outer wall of the neck.

[0006] This bottle body is made of plastic, reducing manufacturing costs. For plastic bottles, the significant cross-sectional change at the connection between the lower neck and the body can lead to stress concentration and require greater pressure resistance. To address this, a specially shaped annular flange is incorporated at the lower neck. This flange features a double-walled structure with several protrusions integrated with the neck. This design effectively enhances the structural strength of the neck-body connection, reducing the risk of neck deformation and cracking, resulting in high-pressure cylinders manufactured from this body with superior pressure resistance. Simultaneously, the top of the bottle body connects to the neck via an arc-shaped constriction structure, similarly reducing stress concentration at the top and ensuring the high-pressure cylinder's pressure resistance.

[0007] Furthermore, because the aforementioned specially shaped annular flange also features an annular groove, during the blow molding process, the blow molding mold can engage with the annular flange to form a locking mechanism. Simultaneously, the protrusions within the annular groove prevent the preform from rotating, ensuring its stable fixation within the mold. This design allows the bottle structure to be successfully molded using plastics processes, while simultaneously guaranteeing the quality of the blow-molded bottle. This superior bottle quality also results in the final high-pressure gas cylinder possessing excellent pressure resistance.

[0008] In the aforementioned high-pressure gas cylinder structure, several protrusions are sequentially spaced along the circumference of the neck, and the protrusions are integrally connected to the upper and lower sidewalls of the annular groove. This structure not only achieves anti-rotation positioning during preform positioning in the blow molding process through multiple protrusions, further improving the positioning effect and the molding quality of the cylinder, but also increases the structural strength of the annular flange because the protrusions are integrally connected to the upper and lower sidewalls of the annular groove, thereby further improving the structural strength of the neck and enhancing the pressure resistance of the plastic high-pressure gas cylinder.

[0009] In the aforementioned high-pressure gas cylinder structure, the upper end of the bottleneck has a bottle mouth, the longitudinal cross-section of the bottle mouth edge is arc-shaped, and the outer wall of the upper end of the bottleneck has a circumferentially arranged annular groove. In actual use, a metal valve seat needs to be riveted to the bottle mouth, and a gas valve is installed on the metal valve seat, allowing the high-pressure gas cylinder to store gas and release it simultaneously. At this time, because the longitudinal cross-section of the bottle mouth edge is arc-shaped, a good "engagement" effect is formed at the contact point between the bottle mouth edge and the metal valve seat. Simultaneously, the edge of the metal valve seat is engaged in the annular groove, making the connection between the metal valve seat and the bottleneck more secure. This effectively prevents the metal valve seat from loosening or falling off during use, especially when the high-pressure gas cylinder is filled with high-pressure gas. This secure connection ensures the stability of the high-pressure gas cylinder during use, giving it good pressure resistance.

[0010] In the above-mentioned high-pressure gas cylinder body structure, the ratio of the outer diameter D of the cylinder body to the height H is 0.3-0.5, and the ratio of the outer diameter d of the bottleneck to the outer diameter D of the cylinder body is 0.4-0.7.

[0011] The shape of this bottle is specifically designed for the refueling needs of beverage containers. The ratio of the outer diameter (D) to the height (H) is set at 0.3-0.5, resulting in a shape that is neither too short and thick nor too long and thin. This design reduces the risk of longitudinal bending deformation within the same volume, ultimately ensuring that the high-pressure gas cylinder made from this bottle has good pressure resistance. Furthermore, the non-short and thick shape allows the high-pressure gas cylinder to be placed effectively in the space beside the dispensing pipe inside the beverage container, thus meeting the need for refueling with a high-pressure gas cylinder within the beverage container.

[0012] In addition, the ratio of the outer diameter d of the bottleneck to the outer diameter D of the bottle body is set to 0.4-0.7, so that the bottleneck is not too thin. This not only ensures that the bottleneck has good rigidity and provides additional structural support, reducing the risk of cracking and deformation of the bottle mouth and the area below it under high pressure, but also makes it easy to put gas storage media such as activated carbon into the bottle, so that the high-pressure gas cylinder can store more gas and has a better gas storage capacity.

[0013] Therefore, the bottle structure is designed specifically for the gas replenishment needs of beverage containers. Through the optimization of the shape and the selection of plastic materials, the final high-pressure gas cylinder combines the advantages of low manufacturing cost and good pressure resistance.

[0014] In the aforementioned high-pressure gas cylinder structure, the outer wall of the cylinder has a strip-shaped groove extending along its height and penetrating at both ends, while the inner wall of the cylinder forms an inwardly convex structure corresponding to the strip-shaped groove. This structure effectively creates a "reinforcing rib" on the cylinder, thereby enhancing its longitudinal bending resistance and preventing deformation under internal pressure. Furthermore, when the high-pressure gas cylinder is installed inside the beverage container, the strip-shaped groove also allows the dispensing pipe to be embedded and positioned, ensuring stability of the dispensing pipe during beverage dispensing.

[0015] In the aforementioned high-pressure gas cylinder structure, the upper end of the strip-shaped groove is located at the top of the cylinder body, and the lower end is located at the bottom of the cylinder body. This strip-shaped groove extends almost the entire length of the cylinder body along its height, which not only enhances the reinforcement of the cylinder body but also increases its mating area with the liquid outlet pipe, thus improving the positioning effect of the liquid outlet pipe.

[0016] In the aforementioned high-pressure gas cylinder structure, the number of strip-shaped grooves is multiple and they are arranged sequentially at intervals along the circumference of the cylinder body. This design effectively supports all parts of the cylinder body when it is filled with high-pressure gas, preventing local deformation and further improving the pressure resistance of the plastic high-pressure gas cylinder.

[0017] In the aforementioned high-pressure gas cylinder structure, the bottom of the cylinder body tapers radially and has an uneven shape. The height of the arc-shaped constricted portion of the cylinder body is h1, and the height of the cylindrical portion of the cylinder body is h2. The ratio of h1 to h2 is 0.2-0.4. This ratio ensures that the arc-shaped constricted portion is not too long, thus avoiding wasted internal volume, while also providing a sufficient transition area to distribute stress and reduce the risk of cylinder breakage. The radially tapering and uneven shape of the bottom of the cylinder body not only reduces the space occupied by the bottom of the cylinder within the beverage container, allowing the container to store more beverage, but also improves the deformation resistance of the bottom of the cylinder body, preventing bulging.

[0018] In the aforementioned high-pressure gas cylinder structure, the cylinder wall thickness is 3mm-6mm. This wall thickness range ensures the cylinder's strength, preventing it from rupturing under high pressure, while also avoiding excessive material waste, resulting in a lighter weight and lower manufacturing cost for the high-pressure gas cylinder.

[0019] Compared with existing technologies, the cylinder structure of this high-pressure gas cylinder has the following advantages:

[0020] 1. Through the optimization of the shape and the selection of plastic materials, this high-pressure gas cylinder combines the multiple advantages of low manufacturing cost, small size and good pressure resistance.

[0021] 2. The bottle body structure is formed by blow molding of the preform. By setting the special-shaped annular flange, the blow molding mold can be locked into the annular groove and the annular flange to form a locking and positioning during the blow molding process. At the same time, the protrusion in the annular groove prevents the preform from rotating, thereby ensuring that the preform is stably and accurately fixed in the mold, ensuring that the blow-molded bottle has good quality. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the bottle.

[0023] Figure 2 This is a front view of the bottle's structure.

[0024] Figure 3 This is a cross-sectional view of the bottle's structure.

[0025] Figure 4 This is a front view of the bottleneck area.

[0026] Figure 5 This is a three-dimensional structural diagram of the bottleneck area.

[0027] Figure 6 This is a partial cross-sectional view of a high-pressure gas cylinder.

[0028] Figure 7 This is a simplified schematic diagram of the high-pressure gas cylinder in use.

[0029] Figure 8 This is a schematic diagram of the fit between the bottle body and the liquid outlet pipe.

[0030] In the diagram, 1 is the bottle body; 11 is the strip groove; 2 is the bottle neck; 21 is the annular groove; 22 is the bottle mouth; 3 is the annular flange; 31 is the annular groove; 32 is the protrusion; 4 is the liquid outlet pipe; 5 is the beverage container; 6 is the metal valve seat; and 7 is the gas valve. Detailed Implementation

[0031] 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.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown, the cylinder structure of this high-pressure gas cylinder includes a cylinder body 1 and a neck 2 integrally molded from plastic material. The neck 2 is cylindrical, the middle part of the cylinder body 1 is cylindrical and the top is arc-shaped, and the bottom of the cylinder body 1 is radially tapered and concave-convex. The wall thickness of the cylinder body 1 is 4mm, the ratio of the outer diameter D of the cylinder body 1 to its height H is 0.38, and the ratio of the outer diameter d of the neck 2 to the outer diameter D of the cylinder body 1 is 0.56. The height h1 of the arc-shaped neck portion of the cylinder body 1 is , the height h2 of the cylindrical portion of the cylinder body 1 is , and the ratio of h1 to h2 is 0.24. Preferably, the outer diameter D of the cylinder body 1 is 50mm-60mm, the outer diameter d of the neck 2 is 25mm-35mm, the height h1 of the arc-shaped neck portion of the cylinder body 1 is 20mm-25mm, and the height h2 of the cylindrical portion of the cylinder body 1 is 90mm-105mm. Of course, in the actual manufacturing process, the specific dimensions of the bottle can be adjusted according to the size of the beverage container 5.

[0034] like Figure 1 and Figure 3 As shown, the outer wall of the bottle body 1 has a strip-shaped groove 11 extending along its height and penetrating both ends. The inner wall of the bottle body 1 has an inwardly convex structure corresponding to the strip-shaped groove 11. The upper end of the strip-shaped groove 11 is located at the top of the bottle body 1, and the lower end is located at the bottom of the bottle body 1.

[0035] like Figure 4 and Figure 5As shown, an annular flange 3 is integrally formed on the outer wall of the lower end of the neck 2, arranged circumferentially. This annular flange 3 has a double-wall structure with an annular groove 31 between the upper and lower walls. Within the annular groove 31, there are four protrusions 32 integrally formed on the outer wall of the neck 2. These protrusions 32 are spaced apart sequentially along the circumference of the neck 2, and are integrally connected to the upper and lower sidewalls of the annular groove 31. Of course, in actual manufacturing, the number of protrusions 32 can also be three, five, six, etc. During blow molding, the blow mold can engage with the annular flange 3 within the annular groove 31, forming a locking and positioning mechanism. Simultaneously, the protrusions 32 within the annular groove 31 prevent the preform from rotating, ensuring stable and precise fixation of the preform in the mold and guaranteeing the final bottle molding quality. Furthermore, the double-wall structure of the annular flange 3 effectively enhances the structural strength of the neck 2, reducing the risk of deformation and cracking, ultimately improving the pressure resistance of the high-pressure gas cylinder.

[0036] like Figure 3 and Figure 6 As shown, the upper end of the bottleneck 2 has a bottle mouth 22, the longitudinal section of the edge of the bottle mouth 22 is arc-shaped, and the outer wall of the upper end of the bottleneck 2 has an annular groove 21 arranged circumferentially. In actual use, the bottle mouth 22 of the bottle body needs to be riveted to a metal valve seat 6, so that a gas valve 7 can be installed on the metal valve seat 6, so that the high-pressure gas cylinder can store gas and release gas at the same time. At this time, because the longitudinal section of the edge of the bottle mouth 22 is arc-shaped, the edge of the bottle mouth 22 can form a good "biting" effect with the metal valve seat 6, and the edge of the metal valve seat 6 can be inserted into the annular groove 21, making the connection between the metal valve seat 6 and the bottleneck 2 more secure.

[0037] like Figure 7 As shown, this high-pressure gas cylinder is fixedly installed inside the beverage container 5 for use. Gas is released from the high-pressure cylinder into the beverage container 5, causing the beverage inside to flow out sequentially through the outlet pipe 4, the dispensing spout, and the dispenser under gas pressure. The beverage container 5, the dispensing spout, the dispenser, and the outlet pipe 4 can all utilize existing technologies, which will not be elaborated upon here. Figure 7 It can be seen that the bottle structure sets the ratio of the outer diameter D of the bottle body 1 to the height H to be 0.3-0.5, so that the gas cylinder is neither too short and thick nor too long and thin. This design allows the high-pressure gas cylinder to effectively utilize the limited space beside the liquid outlet pipe 4 inside the beverage container 5, ensuring that the high-pressure gas cylinder does not occupy too much internal space of the beverage container, allowing the container to store a larger amount of beverage. Furthermore, combined with… Figure 8 As shown, after the high-pressure gas cylinder is installed into the beverage barrel 5, the strip groove 11 can also allow the liquid outlet pipe 4 to be embedded, without the need for additional positioning buckles to position the liquid outlet pipe 4, so that the liquid outlet pipe 4 remains stable during the dispensing process of the beverage barrel 5.

[0038] Example 2

[0039] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that the ratio of the outer diameter D of the bottle body 1 to the height H is 0.3, and the ratio of the outer diameter d of the bottleneck 2 to the outer diameter D of the bottle body 1 is 0.4.

[0040] Example 3

[0041] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that the ratio of the outer diameter D of the bottle body 1 to the height H is 0.5, and the ratio of the outer diameter d of the neck 2 to the outer diameter D of the bottle body 1 is 0.7.

[0042] Example 4

[0043] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that the height of the arc-shaped part of the bottle body 1 is h1, the height of the cylindrical part of the bottle body 1 is h2, and the ratio of h1 to h2 is 0.2.

[0044] Example 5

[0045] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that the height of the arc-shaped part of the bottle body 1 is h1, the height of the cylindrical part of the bottle body 1 is h2, and the ratio of h1 to h2 is 0.4.

[0046] Example 6

[0047] The structure and principle of this embodiment are basically the same as those of Embodiment 1, except that the wall thickness of the bottle body 1 is 3mm.

[0048] Example 7

[0049] The structure and principle of this embodiment are basically the same as those of Embodiment 1, except that the wall thickness of the bottle body 1 is 6mm.

[0050] Example 8

[0051] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that the number of strip grooves 11 is 2, 3 or 4, and each strip groove 11 is arranged at intervals along the circumference of the bottle body 1.

[0052] Example 9

[0053] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that for the structure of the annular flange 3, the number of protrusions 32 in the annular groove 31 is three, five or six, and each protrusion 32 is arranged alternately along the circumference of the bottleneck 2.

[0054] 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.

[0055] Although this document frequently uses terms such as 1. bottle body; 11. strip groove; 2. neck; 21. annular groove; 22. bottle mouth; 3. annular flange; 31. annular groove; 32. protrusion; 4. dispensing pipe; 5. beverage container; 6. metal valve seat; and 7. gas valve, the possibility of using other terms is not excluded. The use of these terms is 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 bottle body structure of a high-pressure gas cylinder comprising a bottle body (1) and a bottle neck (2) which are integrally formed of a plastic material, characterized in that, The bottleneck (2) is cylindrical, the middle part of the bottle body (1) is cylindrical and the top is arc-shaped. An annular flange (3) is integrally formed on the outer wall of the lower end of the bottleneck (2). The annular flange (3) has a double-wall structure and an annular groove (31) is formed between the upper and lower double walls. The annular groove (31) has a number of protrusions (32) integrally formed on the outer wall of the bottleneck (2).

2. The bottle structure of a high-pressure gas cylinder according to claim 1, wherein Several of the protrusions (32) are arranged sequentially at intervals along the circumference of the bottleneck (2), and the protrusions (32) are integrated with the upper and lower sidewalls of the annular groove (31).

3. The cylinder body structure of the high-pressure gas cylinder according to claim 1 or 2, characterized in that, The upper end of the bottleneck (2) has a bottle mouth (22), the longitudinal section of the edge of the bottle mouth (22) is arc-shaped, and the outer wall of the upper end of the bottleneck (2) has an annular groove (21) arranged in the circumferential direction.

4. The bottle body structure of a high-pressure gas cylinder according to claim 1 or 2, characterized by, The ratio of the outer diameter D of the bottle body (1) to its height H is 0.3-0.5, and the ratio of the outer diameter d of the bottleneck (2) to the outer diameter D of the bottle body (1) is 0.4-0.

7.

5. The bottle body structure of a high-pressure gas cylinder according to claim 1 or 2, characterized by, The outer wall of the bottle body (1) has a strip-shaped groove (11) that is arranged along its height direction and extends through both ends. The inner wall of the bottle body (1) has an inwardly convex structure corresponding to the strip-shaped groove (11).

6. The bottle structure of a high-pressure gas cylinder according to claim 5, wherein The upper end of the strip groove (11) is located at the top of the bottle body (1) and the lower end is located at the bottom of the bottle body (1).

7. The bottle structure of a high-pressure gas cylinder according to claim 5, wherein The number of the strip grooves (11) is multiple and they are arranged sequentially at intervals along the circumference of the bottle body (1).

8. The bottle body structure of a high-pressure gas cylinder according to claim 1 or 2, characterized by, The bottom of the bottle body (1) is radially tapered and has an uneven shape. The height of the arc-shaped part of the bottle body (1) is h1, and the height of the cylindrical part of the bottle body (1) is h2. The ratio of h1 to h2 is 0.2-0.

4.

9. The bottle body structure of a high-pressure gas cylinder according to claim 1 or 2, characterized by, The wall thickness of the bottle body (1) is 3mm-6mm.

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