A gas pressurizing device for a beverage container

Abstract

This utility model provides a gas pressurizing device for beverage containers, belonging to the technical field of beverage equipment. It solves the problem of improving the reliability of gas pressurizing devices. The gas pressurizing device for this beverage container includes a gas cylinder and a piston sleeve with a pressure chamber. A cylindrical retaining ring is provided between the upper end of the gas cylinder and the piston sleeve. The retaining ring is fitted over the upper end of the gas cylinder, and its lower end is fixedly connected to the gas cylinder. The piston sleeve is fitted over the retaining ring, and the upper end of the retaining ring is fixedly connected to the piston sleeve. This device, by adding a retaining ring between the piston sleeve and the gas cylinder, changes the traditional direct connection method. By using the retaining ring as an intermediate connector, the piston sleeve and the gas cylinder are connected separately, thus avoiding the situation where the deformation of both the piston sleeve and the gas cylinder is superimposed, leading to unstable connection or even separation. This improves the reliability of the gas pressurizing device.

Description

Technical Field

[0001] This utility model belongs to the field of beverage equipment technology and relates to a gas pressurization device for beverage containers. 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, a gas pressurization device is typically installed inside the container for gas compensation and pressurization. For example, in a wine barrel disclosed in Chinese patent document CN117602568A, the gas pressurization device includes a gas cylinder for providing a gas source and a piston sleeve. The piston sleeve contains a trigger disc and a piston that slides within it. A sealed pressure chamber is formed between the upper side of the piston and the inner wall of the piston sleeve. The trigger disc has an upward-extending elastic plate, and the piston has a clearance space for accommodating the elastic plate and allowing the piston to move downwards relative to the trigger disc. A limiting sleeve is located below the piston within the piston sleeve. When the elastic plate is within the clearance space and the piston moves downwards to abut against the limiting sleeve, the elastic plate is not pressed down by the piston. This design effectively prevents gas waste caused by abnormal gas release from the gas cylinder.

[0004] However, in actual use, it was found that the above-mentioned gas pressurization device still has the following shortcomings when the pressure inside the cylinder changes drastically: As shown in the attached drawings of the above-mentioned patent document, there is a protruding edge on the outer periphery of the cylinder mouth, and a locking protrusion is provided on the inner wall of the piston sleeve. The piston sleeve is directly fitted onto the outside of the cylinder and connected to the cylinder edge through the locking protrusion. Since both the piston sleeve and the cylinder need to withstand high-pressure gas and are directly connected, if both of them deform, the combined deformation will be even greater. This will affect the stability of the connection between the two, causing the connection to loosen or even detach, ultimately affecting the reliability of the gas pressurization device. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a gas pressurization device for beverage containers. The technical problem this invention aims to solve is how to improve the reliability of the gas pressurization device.

[0006] The purpose of this utility model can be achieved through the following technical solution: a gas pressurization device for a beverage container, comprising a gas cylinder and a piston sleeve with a pressure chamber, characterized in that a cylindrical retaining ring is provided between the upper end of the gas cylinder and the piston sleeve, the retaining ring is sleeved outside the upper end of the gas cylinder and the lower end of the retaining ring is fixedly connected to the gas cylinder, and the piston sleeve is sleeved outside the retaining ring and the upper end of the retaining ring is fixedly connected to the piston sleeve.

[0007] Unlike existing technologies that directly connect the piston sleeve and gas cylinder, this invention improves the reliability of the gas pressurization device by adding a retaining ring as an intermediate connecting component between the piston sleeve and the gas cylinder. Specifically, a cylindrical retaining ring is installed between the upper end of the gas cylinder and the piston sleeve. This retaining ring fits over the upper end of the gas cylinder, with its lower end fixed to the cylinder. The piston sleeve fits over the retaining ring, with the upper end of the retaining ring fixed to the piston sleeve. This design prevents the piston sleeve and gas cylinder, which are directly subjected to high pressure and are prone to deformation, from being directly connected. Instead, they are indirectly connected through the retaining ring. Since the high-pressure gas does not directly impact the retaining ring, it is less susceptible to deformation. Furthermore, the piston sleeve and gas cylinder are fixed to the upper and lower ends of the retaining ring, respectively. This avoids the situation where the deformation of both the piston sleeve and the gas cylinder, when both deformed, would result in an unstable connection or even separation. Therefore, the connection between the piston sleeve and the gas cylinder is more reliable, thus improving the reliability of the gas pressurization device.

[0008] In the aforementioned gas pressurization device for beverage containers, the upper end of the gas cylinder has a radially outward protruding flange, the lower end of the piston sleeve has a radially inward protruding locking protrusion on its inner wall, the upper end of the retaining ring has a radially outward protruding upper protrusion on its outer circumferential surface, and the lower end of the retaining ring has a radially inward protruding lower protrusion on its inner circumferential surface. The retaining ring is fitted over the upper end of the gas cylinder and engages with the flange through the lower protrusion. The piston sleeve is fitted over the retaining ring and engages with the upper protrusion through the locking protrusion. By designing upper and lower protrusions at the upper and lower ends of the retaining ring respectively, where the lower protrusion engages with the flange and the upper protrusion engages with the locking protrusion, the piston sleeve and the gas cylinder can be fixedly connected to the upper and lower ends of the retaining ring respectively. This prevents the piston sleeve and the gas cylinder, which are directly subjected to high pressure and are prone to deformation, from being directly connected. Instead, they are indirectly connected through the retaining ring, making the connection between the piston sleeve and the gas cylinder more reliable and improving the reliability of the gas pressurization device.

[0009] As an alternative, in the gas pressurization device for the beverage container mentioned above, the upper and lower ends of the retaining ring can also be fixed to the gas cylinder and the piston sleeve respectively by means of threaded connection.

[0010] In the aforementioned gas pressurization device for beverage containers, the lower protrusion is positioned below the convex edge, and a shoulder is located on the outer circumferential surface of the gas cylinder below the convex edge. A groove is formed between the convex edge and the shoulder, and the lower protrusion is engaged within the groove. This design allows for a more secure connection between the lower protrusion and the convex edge, thereby improving the reliability of the connection between the retaining ring and the gas cylinder, and consequently enhancing the reliability of the gas pressurization device.

[0011] In the aforementioned gas pressurization device for beverage containers, the retaining protrusion is positioned below the upper protrusion, and a limiting sleeve is provided inside the piston sleeve above the retaining protrusion. The upper end of the retaining ring abuts against the lower end of the limiting sleeve, positioning the limiting sleeve against the inner wall of the piston sleeve. Through this design, the limiting sleeve restricts the retaining ring, ensuring a more secure connection between the upper protrusion and the retaining protrusion. This improves the reliability of the connection between the retaining ring and the piston sleeve, thereby enhancing the overall reliability of the gas pressurization device.

[0012] In the aforementioned gas pressurization device for beverage containers, the upper protrusion is annular and surrounds the outer circumference of the retaining ring. Several retaining protrusions are arc-shaped blocks and evenly spaced along the inner circumference of the piston sleeve. On one hand, the annular upper protrusion design makes the retaining protrusions less likely to detach after engagement, ensuring a more secure connection. On the other hand, the multiple retaining protrusions facilitate the interlocking engagement between the retaining protrusions and the upper protrusion. Therefore, the connection between the retaining ring and the piston sleeve is both reliable and convenient.

[0013] In the aforementioned gas pressurization device for beverage containers, the lower protrusions are arc-shaped blocks and are arranged in several quantities, evenly spaced along the inner circumference of the retaining ring. This arrangement of multiple, evenly spaced lower protrusions ensures a reliable and convenient connection between the retaining ring and the gas cylinder.

[0014] In the aforementioned gas pressurization device for beverage containers, the outer periphery of the upper protrusion has a tapered surface with the small end facing upwards. This design facilitates the connection and fit between the piston sleeve and the retaining ring without compromising the reliability of their connection.

[0015] In the aforementioned gas pressurization device for beverage containers, the lower end of the retaining ring is a tapered enlarged hole, with the inner end extending to the lower protrusion and the outer end extending to the lower end of the retaining ring. This design facilitates the connection and fit between the retaining ring and the gas cylinder without compromising the reliability of the connection.

[0016] In the gas pressurization device of the beverage container described above, there is a notch on the edge of the retaining ring located below the center of the lower protrusion. The notch design facilitates air passage.

[0017] In the aforementioned gas pressurization device for beverage containers, both the upper and lower sides of the retaining protrusion are beveled. Several windows, corresponding one-to-one with the positions of the retaining protrusions, are provided on the outer circumference of the piston sleeve, with each window located above the corresponding protrusion. This beveled design facilitates the assembly of the piston sleeve relative to the retaining ring without compromising the reliability of their connection. Simultaneously, the window design allows for easy observation of alignment during piston sleeve and retaining ring assembly, thus facilitating installation. Furthermore, the window allows for the lower part of the piston sleeve to be hollowed out, which improves the piston sleeve's elasticity and further facilitates the mating assembly of the piston sleeve and retaining ring.

[0018] Compared with the prior art, the gas pressurization device of this beverage container has the following advantages: This device changes the traditional connection method of directly connecting the piston sleeve and the gas cylinder by adding a retaining ring between the piston sleeve and the gas cylinder. By using the retaining ring as an intermediate connecting part, the piston sleeve and the gas cylinder are connected separately, thereby avoiding the situation where the deformation of both the piston sleeve and the gas cylinder is superimposed when both are deformed, which would lead to unstable connection or even separation of the two. This improves the reliability of the gas pressurization device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the gas pressurization device.

[0020] Figure 2 yes Figure 1 A partial schematic diagram of the cross-sectional structure at point AA.

[0021] Figure 3 This is a schematic diagram of the exploded structure of the piston sleeve, retaining ring, and upper part of the gas cylinder body in this gas pressurization device.

[0022] Figure 4 This is a top-view schematic diagram of the clasp structure.

[0023] In the diagram, 1 is the gas cylinder; 11 is the raised edge; 12 is the shoulder; 13 is the groove; 2 is the piston sleeve; 2a is the pressure chamber; 21 is the locking protrusion; 22 is the window; 3 is the retaining ring; 31 is the upper protrusion; 31a is the conical surface; 32 is the lower protrusion; 33 is the enlarged hole; 34 is the notch; 4 is the limiting sleeve; 5 is the gas valve; 6 is the piston; and 7 is the trigger plate. Detailed Implementation

[0024] 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.

[0025] Specifically, such as Figure 1 and Figure 2As shown, the gas pressurization device of this beverage container includes a gas cylinder 1 equipped with a gas valve 5 and a piston sleeve 2 with a pressure chamber 2a. A piston 6 and a trigger disc 7 are disposed inside the piston sleeve 2. The pressure chamber 2a is formed between the inner wall of the piston sleeve 2 and the upper side of the piston 6 and is sealed. The upper end of the gas cylinder 1 has a radially outwardly protruding flange 11, and the lower end of the piston sleeve 2 has a radially inwardly protruding locking protrusion 21 on its inner wall. A cylindrical locking ring 3 is provided between the locking protrusion 21 and the flange 11. The locking ring 3 is fitted over the upper end of the gas cylinder 1, and its lower end is fixedly connected to the flange 11. The piston sleeve 2 is fitted over the locking ring 3, and its upper end is fixedly connected to the locking protrusion 21.

[0026] More specifically, for example Figure 2 , Figure 3 and Figure 4 As shown, the outer circumferential surface of the upper end of the retaining ring 3 has an upper protrusion 31 that protrudes radially outward, and the inner circumferential surface of the lower end of the retaining ring 3 has a lower protrusion 32 that protrudes radially inward. A ventilation groove 13, vertically penetrating both ends of the retaining ring 3, is formed on the inner wall of the retaining ring 3 between two adjacent lower protrusions 32. The retaining ring 3 is fitted over the upper end of the gas cylinder 1 and fastened to the protruding edge 11 via the lower protrusion 32. The piston sleeve 2 is fitted over the retaining ring 3 and fastened to the upper protrusion 31 via the retaining protrusion 21. The upper protrusion 31 is annular and surrounds the outer circumferential surface of the retaining ring 3. The retaining protrusion 21 is arc-shaped and has several sections, evenly spaced along the inner circumferential surface of the piston sleeve 2. Both the upper and lower sides of the retaining protrusion 21 are inclined surfaces. Several windows 22, corresponding one-to-one with the positions of the retaining protrusions 21, are formed on the outer circumferential surface of the piston sleeve 2. The windows 22 are located above the corresponding retaining protrusions 21. The lower protrusion 32 is arc-shaped and has several parts, which are evenly spaced along the inner circumferential surface of the retaining ring 3. The outer circumference of the upper protrusion 31 has a tapered surface 31a with the small end facing upward. The lower port of the retaining ring 3 is a tapered enlarged hole 33, the inner end of which extends to the lower protrusion 32, and the outer end extends to the lower end of the retaining ring 3. The edge of the retaining ring 3 located below the middle of the lower protrusion 32 has a notch 34. The lower protrusion 32 is fastened below the convex edge 11. The outer circumferential surface of the gas cylinder 1 below the convex edge 11 has a shoulder 12. A groove 13 is formed between the convex edge 11 and the shoulder 12, and the lower protrusion 32 is locked in the groove 13. The retaining protrusion 21 is fastened below the upper protrusion 31. A limiting sleeve 4 is provided in the piston sleeve 2 above the retaining protrusion 21. The upper end of the retaining ring 3 abuts against the lower end of the limiting sleeve 4 and positions the limiting sleeve 4 against the inner wall of the piston sleeve 2.

[0027] 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.

[0028] Although this document frequently uses terms such as gas cylinder 1, raised edge 11, raised shoulder 12, groove 13, piston sleeve 2, pressure chamber 2a, retaining protrusion 21, window 22, retaining ring 3, upper protrusion 31, conical surface 31a, lower protrusion 32, enlarged hole 33, notch 34, limiting sleeve 4, gas valve 5, piston 6, and trigger plate 7, 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 gas pressurization device for a beverage container, comprising a gas cylinder (1) and a piston sleeve (2) having a pressure chamber (2a), characterized in that, A cylindrical retaining ring (3) is provided between the upper end of the gas cylinder (1) and the piston sleeve (2). The retaining ring (3) is sleeved outside the upper end of the gas cylinder (1) and the lower end of the retaining ring (3) is fixedly connected to the gas cylinder (1). The piston sleeve (2) is sleeved outside the retaining ring (3) and the upper end of the retaining ring (3) is fixedly connected to the piston sleeve (2).

2. The gas pressurization device for a beverage container according to claim 1, characterized in that, The upper end of the gas cylinder (1) has a radially outward protruding flange (11), the lower end of the piston sleeve (2) has a radially inward protruding locking flange (21) on its inner wall, the upper end of the retaining ring (3) has a radially outward protruding upper flange (31) on its outer circumferential surface, and the lower end of the retaining ring (3) has a radially inward protruding lower flange (32) on its inner circumferential surface. The retaining ring (3) is fitted over the upper end of the gas cylinder (1) and fastened to the flange (11) through the lower flange (32). The piston sleeve (2) is fitted over the retaining ring (3) and fastened to the upper flange (31) through the locking flange (21).

3. The gas pressurization device for a beverage container according to claim 2, characterized in that, The lower protrusion (32) is attached to the lower part of the protruding edge (11). The outer peripheral surface of the gas cylinder (1) below the protruding edge (11) has a shoulder (12). A groove (13) is formed between the protruding edge (11) and the shoulder (12). The lower protrusion (32) is stuck in the groove (13).

4. The gas pressurization device for a beverage container according to claim 2, characterized in that, The locking protrusion (21) is fastened below the upper protrusion (31), and a limiting sleeve (4) is provided inside the piston sleeve (2) above the locking protrusion (21). The upper end of the retaining ring (3) abuts against the lower end of the limiting sleeve (4) and positions the limiting sleeve (4) against the inner wall of the piston sleeve (2).

5. The gas pressurization device for a beverage container according to claim 2, 3, or 4, characterized in that, The upper protrusion (31) is annular and surrounds the outer circumference of the retaining ring (3). The retaining protrusion (21) is arc-shaped and has several parts, which are evenly spaced along the inner circumference of the piston sleeve (2).

6. The gas pressurization device for a beverage container according to claim 2, 3, or 4, characterized in that, The lower protrusion (32) is arc-shaped and has several parts, and is evenly spaced along the inner circumferential surface of the retaining ring (3).

7. The gas pressurization device for a beverage container according to claim 5, characterized in that, The upper convex part (31) has a tapered surface (31a) with the small end facing upward on its outer periphery.

8. The gas pressurization device for a beverage container according to claim 2, 3, or 4, characterized in that, The lower end of the retaining ring (3) is a tapered enlarged hole (33), the inner end of which extends to the lower protrusion (32) and the outer end extends to the lower end of the retaining ring (3).

9. The gas pressurization device for a beverage container according to claim 6, characterized in that, The retaining ring (3) located below the middle of the lower protrusion (32) has a notch (34) on its edge.

10. The gas pressurization device for a beverage container according to claim 2, 3, or 4, characterized in that, The upper and lower sides of the card protrusion (21) are both inclined surfaces. The outer circumferential surface of the piston sleeve (2) is provided with a plurality of windows (22) that correspond one-to-one with the positions of the card protrusion (21). The windows (22) are located above the corresponding card protrusion (21).

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