Pressure balancing structure of beverage container

Abstract

A pressure balancing structure of a beverage container, which belongs to the technical field of beverage containers, and solves the problem of existing plastic kegs failing to achieve dynamic regulation of gas intake. The pressure balancing structure of a beverage container comprises a pressure regulating main body (2) connected to a spear (1) and having a pressure regulating cavity (2a), a gas cylinder (3) being provided on the pressure regulating main body (2); the pressure regulating cavity (2a) comprises a first pressure cavity (2a1) communicated with the gas cylinder (3), a second pressure cavity (2a2) communicated with a gas inlet channel (1a) and a third pressure cavity (2a3) arranged adjacent to the second pressure cavity (2a2); a communication hole (2a4) is provided between the first pressure cavity (2a1) and the second pressure cavity (2a2); a pressure regulating rod assembly (4) used for sealing or opening the communication hole (2a4) on the basis of the pressure difference between the second pressure cavity (2a2) and the third pressure cavity (2a3) is provided in the pressure regulating cavity (2a); the pressure regulating rod assembly (4) comprises a pressure regulating rod (4a) movably passing through the communication hole (2a4) and provided with a limiting part (4a2); when the pressure regulating rod (4a) moves towards the first pressure cavity (2a1), the limiting part (4a2) can abut against the cavity wall of the second pressure cavity (2a2) to provide limiting, so as to keep the communication hole (2a4) open. The present structure achieves dynamic regulation of gas intake of beverage containers.

Description

Pressure balancing structure for beverage container Technical Field

[0001] The invention belongs to the technical field of beverage containers and relates to a pressure balancing structure of a beverage container. Background Art

[0002] A beverage container is a tool for holding beverages such as beer. For example, a Chinese patent document discloses a plastic wine barrel (application number: CN201721211474.6; announcement number: CN 207209942U), which includes an inner barrel body made of plastic, a wine spear provided at the barrel mouth of the inner barrel body, an outer fixed sleeve of the inner barrel body provided with an outer barrel body made of plastic, and a gap between the outer barrel body and the inner barrel body. Existing plastic wine barrels need to be used in conjunction with a dispenser to draw out the beer from the inner barrel. Specifically, a dispenser is first installed on the beer spear (the specific structure of the dispenser can refer to a small barrel outlet device disclosed in Chinese patent document application number CN201020552104.0 and announcement number CN201834755U). The dispenser has a wine outlet and an air inlet, wherein the air inlet is externally connected to a carbon dioxide gas cylinder. When the dispenser is opened, the high-pressure gas in the carbon dioxide gas cylinder enters the inner barrel through the air inlet of the dispenser, causing high pressure to be generated in the inner barrel, and the beer in the inner barrel flows out through the wine outlet of the dispenser under the action of the high pressure. Since the existing wine barrel, dispenser and carbon dioxide gas cylinder are in a separated state, there are disadvantages such as a non-compact structure, an overall unsightly appearance, and impracticality.

[0003] Existing plastic wine barrels require additional connection to a dispenser and a carbon dioxide cylinder when in use. When there is no dispenser or carbon dioxide cylinder around, there is a problem of insufficient convenience in use; and the existing dispenser requires manually pulling a trigger up or down to open and close the air intake passage, and cannot achieve dynamic adjustment of the air intake. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a pressure balancing structure for a beverage container. The technical problem to be solved by the present invention is how to achieve dynamic regulation of the air intake of the beverage container while making the air intake of the beverage container smoother.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A pressure balancing structure for a beverage container, the beverage container includes a wine spear with an air inlet channel, and is characterized in that the pressure balancing structure includes a pressure-regulating main body connected to the wine spear and having a pressure-regulating chamber, a gas cylinder is provided on the pressure-regulating main body, the pressure-regulating chamber includes a first pressure chamber connected to the gas cylinder, a second pressure chamber connected to the air inlet channel, and a third pressure chamber arranged adjacent to the second pressure chamber, a connecting hole is provided between the first pressure chamber and the second pressure chamber, a pressure-regulating rod assembly is provided in the pressure-regulating chamber for sealing or opening the connecting hole according to the pressure difference between the second pressure chamber and the third pressure chamber, the pressure-regulating rod assembly includes a pressure-regulating rod movably arranged in the connecting hole and having a limiting portion, when the pressure-regulating rod moves toward the first pressure chamber, the limiting portion can be limited and abutted against the cavity wall of the second pressure chamber to keep the connecting hole open.

[0007] The pressure balancing structure of the beverage container changes according to the pressure difference between the second pressure chamber and the third pressure chamber, and then controls the blocking or opening of the connecting hole by moving the pressure regulating rod in the pressure regulating rod assembly to realize dynamic adjustment of the air intake of the beverage container. At the same time, when the pressure regulating rod moves toward the first pressure chamber to open the connecting hole, the high-pressure gas in the gas cylinder continuously enters the beverage container through the first pressure chamber, the second pressure chamber and the air intake channel. At the same time, the limiting part on the pressure regulating rod can abut against the cavity wall of the second pressure chamber to block the further movement of the pressure regulating rod toward the first pressure chamber. After the limiting part abuts against the cavity wall of the second pressure chamber, the air intake amount of the connecting hole remains constant, thereby preventing jamming, ensuring smooth air intake, and maintaining the gas pressure in the beverage container within a certain range to meet the liquid discharge requirements, thereby realizing dynamic adjustment of the air intake of the beverage container and making the air intake of the beverage container smoother.

[0008] In addition, the beverage container no longer needs to be connected to additional accessories such as a dispenser when in use, thereby making the beverage container equipped with the pressure balancing structure more convenient to use.

[0009] In the pressure balancing structure of a beverage container, an elastic diaphragm capable of elastic deformation and maintaining a separation state between the second and third pressure chambers is sleeved on the pressure regulating rod, and the pressure regulating rod further has a support portion, and the support portion abuts against the central area of ​​the elastic diaphragm. Sleeving the elastic diaphragm on the pressure regulating rod can better maintain synchronous movement between the two. The provision of the support portion can further limit the deformation of the elastic diaphragm, so that the elastic diaphragm can maintain a certain stiffness after deformation to maintain the separation state between the second and third pressure chambers. At the same time, the contact area between the pressure regulating rod and the deformed portion of the elastic diaphragm can be increased, so that the elastic diaphragm can better drive the synchronous movement of the pressure regulating rod through its own deformation, thereby better achieving dynamic regulation of the air intake of the beverage container. At the same time, the elastic diaphragm has good elasticity and toughness, can withstand large pressure and deformation, has stable performance, and is not easily resonated with the vibration of the beverage container, has good shock resistance, and is highly reliable in use.

[0010] In the above-mentioned pressure balancing structure of a beverage container, the pressure-regulating rod is movably arranged in the second pressure chamber, and the pressure-regulating rod has a pushing portion that passes through the communicating hole. The pressure-regulating rod assembly also includes a push rod that is movably arranged in the first pressure chamber and can seal the communicating hole. There is an air gap between the push portion and the hole wall of the communicating hole, and the push portion and the push rod are in contact with each other. The pushing portion of the pressure-regulating rod extends into the connecting hole, so that when the pressure-regulating rod moves toward the first pressure chamber, the pushing portion can extend into the first pressure chamber and push the push rod open. There is an air gap between the pushing portion and the hole wall of the connecting hole. In addition, the pressure-regulating rod passing through the connecting hole and extending into the first pressure chamber can prevent the two ends of the connecting hole from being accidentally blocked, thereby keeping the first pressure chamber and the second pressure chamber connected to prevent jamming and further ensuring smooth air intake; and when the push rod moves toward the second pressure chamber, the push rod can push the pushing portion extending into the first pressure chamber back into the connecting hole and block the connecting hole, thereby isolating the first pressure chamber and the second pressure chamber, so that the gas pressure in the beverage container is maintained within a certain range to meet the liquid discharge requirements.

[0011] In addition, the pressure-regulating rod assembly can also adopt the following structure: the pressure-regulating rod assembly includes a pressure-regulating rod movably arranged in the second pressure chamber, the pressure-regulating rod has a pushing portion that passes through the connecting hole and extends into the first pressure chamber, there is an air gap between the pushing portion and the hole wall of the connecting hole, and the end of the pushing portion extending into the first pressure chamber has a plugging portion that can seal the connecting hole.

[0012] In the pressure balancing structure of the beverage container described above, the push rod is provided with a first elastic member that abuts against the push rod and the wall of the first pressure chamber, and the pressure-regulating rod is provided with a second elastic member that abuts against the pressure-regulating rod and the wall of the third pressure chamber, and the first elastic member and the second elastic member enable the pushing portion and the push rod to maintain abutment. By providing the first elastic member and the second elastic member, the pressure-regulating rod and the push rod can always maintain abutment, and under the action of the elastic force, the movement of the pressure-regulating rod and the push rod is smoother, avoiding excessive movement or slowness, and the increase in air pressure in the second pressure chamber and the beverage container is also smoother, thereby improving the stability of liquid extraction.

[0013] In the pressure balancing structure of the beverage container described above, the limiting portion is located beside the pushing portion, and when the limiting portion is in contact with the wall of the second pressure chamber, the pushing portion extends into the first pressure chamber and pushes the push rod open so that the first pressure chamber and the second pressure chamber remain connected. The limiting portion on the pressure regulating rod can control the displacement of the pressure regulating rod. On the one hand, it can prevent the pressure regulating rod from moving too much, which may cause the pressure regulating rod to be difficult to reset or unable to fully reset. On the other hand, it can keep the air gap formed between the pressure regulating rod and the connecting hole stable, so that the amount of air passing through the connecting hole remains stable, thereby better maintaining the connection between the first pressure chamber and the second pressure chamber. At the same time, the pressure regulating rod that is inserted into the connecting hole and extends into the first pressure chamber can prevent the two ends of the connecting hole from being accidentally blocked, further prevent jamming, ensure smooth air intake, and thus better keep the connecting hole open to connect the first pressure chamber and the second pressure chamber.

[0014] In the aforementioned pressure-balancing structure for a beverage container, a sealing head made of an elastically deformable material is provided at the end of the ejector rod near the communicating hole, and the sealing head abuts against the ejector portion. The elastically deformable material of the sealing head allows it to better seal the communicating hole, isolating the first and second pressure chambers, thereby maintaining the gas pressure within the beverage container within a certain range to meet liquid discharge requirements. Furthermore, it facilitates abutment between the ejector rod and the pressure-regulating rod.

[0015] In the pressure-balancing structure for a beverage container, the first pressure chamber extends through the first end of the pressure-regulating body and is provided with a removable plugging cap for sealing. The third pressure chamber extends through the second end of the pressure-regulating body and is provided with a removable cap for communicating with the outside world. The removable plugging cap and cap facilitate assembly of the internal components of the pressure-balancing body, facilitate disassembly and maintenance of the pressure-balancing structure, and enhance durability.

[0016] In the aforementioned pressure-balancing structure for a beverage container, an annular receiving groove is formed at the junction of the pressure-regulating body and the cap, and the edge of the elastic diaphragm is embedded in the receiving groove. By embedding the edge of the elastic diaphragm in the receiving groove, the deformation of the elastic diaphragm is limited, allowing the elastic diaphragm to maintain a certain stiffness after deformation to maintain the separation between the second pressure chamber and the third pressure chamber. At the same time, by controlling the deformation of the elastic diaphragm within a certain range, the pressure-balancing structure of the beverage container can better automatically control the connection or disconnection between the gas cylinder and the beverage container's air inlet channel based on the pressure difference between the interior of the beverage container and atmospheric pressure.

[0017] In the aforementioned pressure-balancing structure for a beverage container, one end of the second elastic member abuts the central region of the elastic diaphragm, and the other end of the second elastic member abuts the cap. The second elastic member abutting the central region of the elastic diaphragm can also indirectly abut the support portion to better withstand pressure, allowing the second elastic member to better assist in the movement of the pressure-regulating rod. Furthermore, the support portion on the pressure-regulating rod can further limit the deformation of the elastic diaphragm, allowing the elastic diaphragm to maintain a certain degree of stiffness after deformation, thereby maintaining isolation between the second and third pressure chambers.

[0018] In the pressure-balancing structure of the beverage container described above, the diameter of the communicating hole at the end near the second pressure chamber is larger than the diameter of the communicating hole at the end near the first pressure chamber. The end of the communicating hole near the second pressure chamber is configured in a trumpet shape, and the diameter of the communicating hole near the second pressure chamber is larger than the diameter of the communicating hole near the first pressure chamber. This can reduce the pressure of airflow entering the second pressure chamber, prevent the pressure-regulating rod from being accidentally pushed by airflow during intake, and maintain a stable air gap between the pressure-regulating rod and the communicating hole, thereby better maintaining communication between the first and second pressure chambers.

[0019] Compared with the prior art, the advantages of the pressure balance structure of the beverage container are:

[0020] 1. The pressure balancing structure of the beverage container controls the blocking or opening of the communicating hole by the movement of the pressure-regulating rod in the pressure-regulating rod assembly to realize dynamic adjustment of the air intake of the beverage container. At the same time, when the pressure-regulating rod moves toward the first pressure chamber to open the communicating hole, the limiting portion on the pressure-regulating rod can abut against the cavity wall of the second pressure chamber to prevent the pressure-regulating rod from further moving toward the first pressure chamber. After the limiting portion abuts against the cavity wall of the second pressure chamber, the air intake amount of the communicating hole remains constant, thereby preventing jamming and ensuring smooth air intake, so that the gas pressure in the beverage container is maintained within a certain range to meet the liquid discharge requirements, thereby realizing dynamic adjustment of the air intake of the beverage container and making the air intake of the beverage container smoother.

[0021] 2. The pressure balancing structure of the beverage container can better achieve dynamic regulation of the air intake of the beverage container by sleeve-fitting an elastic diaphragm on the pressure-regulating rod and providing a support portion on the pressure-regulating rod that abuts against the central area of ​​the elastic diaphragm, so that the elastic diaphragm can better drive the pressure-regulating rod to move synchronously through its own deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the three-dimensional structure of the pressure balance structure of the beverage container.

[0023] FIG2 is a cross-sectional view taken along the AA direction in FIG1 .

[0024] FIG3 is a schematic diagram of the three-dimensional structure of the pressure-balancing structure of the beverage container, the pressure-regulating rod and the elastic diaphragm.

[0025] FIG4 is an exploded view of the pressure-balancing structure of the beverage container, the pressure-regulating rod and the elastic diaphragm.

[0026] In the figure, 1, wine spear; 1a, air inlet channel; 1a1, outlet; 2, pressure regulating body; 2a, pressure regulating chamber; 2a1, first pressure chamber; 2a2, second pressure chamber; 2a3, third pressure chamber; 2a4, communicating hole; 2b, first end; 2c, second end; 3, gas cylinder; 3a, gas nozzle; 4, pressure regulating rod assembly; 4a, pressure regulating rod; 4a1, pushing part; 4a2, limiting part; 4a3, supporting part; 4a4, connecting part; 4a41, positioning groove; 4b, push rod; 4b1, sealing head; 5, air gap; 6, first elastic member; 7, second elastic member; 8, elastic diaphragm; 8a, sleeve; 8a1, positioning ridge; 9, blocking cap; 10, cover cap; 11, accommodating groove; d1, diameter of the communicating hole close to the first pressure chamber end; d2, diameter of the communicating hole close to the second pressure chamber end. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0028] Example 1

[0029] As shown in Figures 1 and 2, a pressure-balancing structure for a beverage container includes a lance 1 having an air inlet channel 1a. The outlet 1a1 of the air inlet channel 1a is located at the lower end of the lance 1. The lance 1 is mounted on the container body, with the lower end of the lance 1 inserted into the body. This pressure-balancing structure includes a pressure-regulating body 2 fixedly connected to the lance 1 and having a pressure-regulating chamber 2a. A gas cylinder 3 is mounted on the pressure-regulating body 2, and a gas nozzle 3a is located at the mouth of the gas cylinder 3. The pressure-regulating chamber 2a includes a first pressure chamber 2a1 connected to the gas cylinder 3, a second pressure chamber 2a2 connected to the air inlet channel 1a, and a third pressure chamber 2a3 adjacent to the second pressure chamber 2a2. A connecting hole 2a4 is defined between the first and second pressure chambers 2a1 and 2a2. The gas nozzle 3a is inserted into the pressure-regulating body 2 and communicates with the first pressure chamber 2a1. The inlet of the air inlet channel 1a is located on the wall of the second pressure chamber 2a2. A pressure-regulating rod assembly 4 is disposed within the pressure-regulating chamber 2a, configured to close or open a communication hole 2a4 based on the pressure differential between the second pressure chamber 2a2 and the third pressure chamber 2a3. The pressure-regulating rod assembly 4 includes a pressure-regulating rod 4a movably disposed within the communication hole 2a4 and having a stopper 4a2. When the pressure-regulating rod 4a moves toward the first pressure chamber 2a1, the stopper 4a2 abuts against the wall of the second pressure chamber 2a2, thereby maintaining the communication hole 2a4 open.

[0030] As shown in Figure 2, the pressure-regulating rod 4a is movably disposed within the second pressure chamber 2a2 and includes a push portion 4a1 that extends through the communicating hole 2a4. The pressure-regulating rod assembly 4 also includes a push rod 4b that is movably disposed within the first pressure chamber 2a1 and capable of sealing the communicating hole 2a4. An air gap 5 is defined between the push portion 4a1 and the wall of the communicating hole 2a4, and the push portion 4a1 and the push rod 4b abut against each other. In this embodiment, the push rod 4b is sleeved with a first elastic member 6 that abuts against the wall of the first pressure chamber 2a1. The pressure-regulating rod 4a is sleeved with a second elastic member 7 that abuts against the wall of the third pressure chamber 2a3. The first and second elastic members 6 and 7 maintain abutment between the push portion 4a1 and the push rod 4b. The first elastic member 6 and the second elastic member 7 are both springs, such as compression springs or springs, and the spring constant of the second elastic member 7 is greater than the spring constant of the first elastic member 6 .

[0031] As shown in Figure 2, the pressure-regulating rod 4a is sleeved with an elastic diaphragm 8 that is elastically deformable and maintains the separation between the second and third pressure chambers 2a2 and 2a3. The pressure-regulating rod 4a also has a support portion 4a3 that abuts the center of the elastic diaphragm 8. The stopper 4a2 is located adjacent to the push portion 4a1. When the stopper 4a2 abuts the wall of the second pressure chamber 2a2, the push portion 4a1 extends into the first pressure chamber 2a1 and pushes the push rod 4b open, maintaining communication between the first and second pressure chambers 2a1 and 2a2. As shown in Figures 3 and 4, the stopper 4a2 is cylindrical and has three stoppers 4a2 arranged circumferentially around the push portion 4a1. The stoppers 4a2 and push portion 4a1 are integrally connected by a web. This ensures a more stable abutment between the stopper 4a2 and the second pressure chamber 2a2, thereby ensuring smooth air intake. The support portion 4a3 is annular in shape, allowing the elastic diaphragm 8 to be securely fixed thereto and maintain a stable seal. The pressure-regulating rod 4a also includes a rod-shaped connecting portion 4a4. The outer surface of the connecting portion 4a4 has two symmetrically arranged positioning grooves 4a41. The elastic diaphragm 8 has a protruding sleeve 8a. The inner surface of the sleeve 8a has positioning protrusions 8a1 corresponding to the positioning grooves 4a41. The connecting portion 4a4 is inserted into the sleeve 8a, and the positioning protrusions 8a1 fit into the positioning grooves 4a41. The bottom end of the sleeve 8a is sealed, with the end of the connecting portion 4a4 resting against the bottom wall of the sleeve 8a. This arrangement ensures a stable connection between the pressure-regulating rod 4a and the elastic diaphragm 8.

[0032] As shown in Figure 2, in this embodiment, a sealing head 4b1 made of an elastically deformable material (such as rubber or silicone) is provided at the end of the push rod 4b near the connecting hole 2a4. The sealing head 4b1 abuts against the pushing portion 4a1. The diameter d2 of the connecting hole 2a4 near the second pressure chamber 2a2 is larger than the diameter d1 of the connecting hole 2a4 near the first pressure chamber 2a1. The end of the connecting hole 2a4 near the second pressure chamber 2a2 is flared and trumpet-shaped.

[0033] As shown in Figures 1 and 2, the first pressure chamber 2a1 extends through the first end 2b of the pressure-regulating body 2 and is removably sealed with a plug 9. The plug 9 is inserted into the first end 2b and threadedly connected thereto, with one end of the first spring 6 resting against the plug 9. The third pressure chamber 2a3 extends through the second end 2c of the pressure-regulating body 2 and is removably connected to the outside world with a cap 10. The cap 10 has several claws on its outer edge and a corresponding retaining ring on its second end 2c. The claws engage the retaining rings, forming a snap connection. By bending the claws outward and disengaging the retaining rings, the cap 10 can be removed. An annular receiving groove 11 is formed at the junction of the pressure-regulating body 2 and the cap 10, and the edge of the elastic diaphragm 8 is embedded in the receiving groove 11. One end of the second elastic member 7 abuts against the central area of ​​the elastic diaphragm 8, and the other end of the second elastic member 7 abuts against the cap 10. A through hole is provided at the center of the cap 10, and the end of the connecting portion 4a4 is passed through the through hole.

[0034] In the initial state, the air pressure inside the beverage container is the same as the air pressure in the second pressure chamber 2a2 and both are lower than atmospheric pressure. The air pressure in the third pressure chamber 2a3 is equal to atmospheric pressure. At this time, because the air pressure in the third pressure chamber 2a3 is higher than the air pressure in the second pressure chamber 2a2, when the pressure value in the third pressure chamber 2a3 reaches the critical value of the elastic force of the elastic diaphragm 8, the elastic diaphragm 8 will deform toward the second pressure chamber 2a2. In addition, the elastic diaphragm 8 is sleeved on the pressure-regulating rod 4a, so the pressure-regulating rod 4a will synchronously move toward the first pressure chamber 2a1. The pushing portion 4a1 on the pressure-regulating rod 4a extends into the first pressure chamber 2a1 and pushes open the push rod 4b to keep the first pressure chamber 2a1 and the second pressure chamber 2a2 connected. At this time, the high-pressure gas in the gas cylinder 3 can pass through the first pressure chamber 2a1 and the second pressure chamber 2a 2 and the air inlet channel 1a enter the interior of the beverage container, and the gas flows as shown by the small arrow in Figure 2, causing the air pressure in the second pressure chamber 2a2 and the beverage container to increase to press the liquid in the beverage container out; at the same time, after the air pressure in the second pressure chamber 2a2 continues to increase, when the air pressure in the second pressure chamber 2a2 is greater than the third pressure chamber 2a3 (the pressure in the third pressure chamber 2a3 is equal to the atmospheric pressure), the elastic diaphragm 8 deforms in the opposite direction toward the third pressure chamber 2a3, and the pressure-regulating rod 4a is reversely pressurized and moves toward the second pressure chamber 2a2 under the push of the push rod 4b until the push rod 4b blocks the communicating hole 2a4 to isolate the first pressure chamber 2a1 and the second pressure chamber 2a2, thereby maintaining the gas pressure in the beverage container within a certain range to meet the liquid discharge requirement.

[0035] When the air pressure in the beverage container decreases again due to the reduction of liquid, the above steps are repeated, and the cycle continues. Therefore, the pressure balance structure of the beverage container can automatically control the connection or disconnection between the gas cylinder 3 and the air inlet channel 1a of the beverage container according to the pressure difference between the interior of the beverage container and the atmospheric pressure to maintain the gas pressure in the beverage container within a certain range to meet the liquid discharge requirements, thereby realizing real-time dynamic adjustment of the air intake of the beverage container.

[0036] Example 2

[0037] The structure of the pressure-regulating rod 4a differs slightly from that of the first embodiment. The pressure-regulating rod assembly 4 comprises a pressure-regulating rod 4a movably disposed within the second pressure chamber 2a2. The rod 4a has a push portion 4a1 that extends through the communicating hole 2a4 and into the first pressure chamber 2a1. An air gap 5 is defined between the push portion 4a1 and the wall of the communicating hole 2a4. The end of the push portion 4a1 that extends into the first pressure chamber 2a1 is provided with a plug that seals the communicating hole 2a4. Specifically, the plug on the push portion 4a1 seals the communicating hole 2a4, while the sealing head 4b1 is not provided on the push rod 4b. The remaining structure is identical to that of the first embodiment.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A pressure balancing structure for a beverage container, the beverage container comprising a wine spear (1) having an air inlet channel (1a), characterized in that: The pressure balancing structure comprises a pressure regulating body (2) connected to a wine spear (1) and having a pressure regulating chamber (2a); a gas cylinder (3) is provided on the pressure regulating body (2); the pressure regulating chamber (2a) comprises a first pressure chamber (2a1) communicating with the gas cylinder (3), a second pressure chamber (2a2) communicating with an air inlet channel (1a), and a third pressure chamber (2a3) arranged adjacent to the second pressure chamber (2a2); a communicating hole (2a4) is provided between the first pressure chamber (2a1) and the second pressure chamber (2a2); and the pressure regulating chamber (2a3) is provided with a pressure regulating hole (2a4). A pressure regulating rod assembly (4) is provided in (2a) for sealing or opening the communicating hole (2a4) according to the pressure difference between the second pressure chamber (2a2) and the third pressure chamber (2a3). The pressure regulating rod assembly (4) includes a pressure regulating rod (4a) movably arranged in the communicating hole (2a4) and having a limiting portion (4a2). When the pressure regulating rod (4a) moves toward the first pressure chamber (2a1), the limiting portion (4a2) can be limited and abutted against the cavity wall of the second pressure chamber (2a2) to keep the communicating hole (2a4) open.

2. A pressure balancing structure for a beverage container according to claim 1, characterized in that: The pressure regulating rod (4a) is sleeved with an elastic diaphragm (8) capable of elastic deformation and maintaining the second pressure chamber (2a2) and the third pressure chamber (2a3) in a separated state. The pressure regulating rod (4a) also has a supporting portion (4a3), and the supporting portion (4a3) abuts against the central area of the elastic diaphragm (8).

3. The pressure balancing structure of a beverage container according to claim 2, characterized in that: The pressure regulating rod (4a) is movably arranged in the second pressure chamber (2a2), and the pressure regulating rod (4a) has a pushing portion (4a1) penetrating the connecting hole (2a4). The pressure regulating rod assembly (4) also includes a push rod (4b) movably arranged in the first pressure chamber (2a1) and capable of blocking the connecting hole (2a4). An air gap (5) is provided between the pushing portion (4a1) and the hole wall of the connecting hole (2a4), and the pushing portion (4a1) and the push rod (4b) are in contact with each other.

4. A pressure balancing structure for a beverage container according to claim 3, characterized in that: The push rod (4b) is sleeved with a first elastic member (6) that abuts against the push rod (4b) and the cavity wall of the first pressure chamber (2a1); the pressure regulating rod (4a) is sleeved with a second elastic member (7) that abuts against the pressure regulating rod (4a) and the cavity wall of the third pressure chamber (2a3); and the first elastic member (6) and the second elastic member (7) keep the pushing portion (4a1) and the push rod (4b) in abutment with each other.

5. The pressure balancing structure of a beverage container according to claim 3, characterized in that: The limiting portion (4a2) is located beside the pushing portion (4a1), and when the limiting portion (4a2) is in contact with the cavity wall of the second pressure cavity (2a2), the pushing portion (4a1) extends into the first pressure cavity (2a1) and pushes open the push rod (4b) to keep the first pressure cavity (2a1) and the second pressure cavity (2a2) connected.

6. The pressure balancing structure of a beverage container according to claim 3, characterized in that: A sealing head (4b1) made of elastically deformable material is provided at the end of the push rod (4b) close to the communicating hole (2a4), and the sealing head (4b1) is in contact with the pushing portion (4a1).

7. The pressure balancing structure of a beverage container according to claim 3, characterized in that: The first pressure chamber (2a1) extends and passes through the first end portion (2b) of the pressure regulating body (2), and a plugging cap (9) for sealing is detachably provided at the first end portion (2b) of the pressure regulating body (2); the third pressure chamber (2a3) extends and passes through the second end portion (2c) of the pressure regulating body (2), and a cap (10) communicating with the outside is detachably provided at the second end portion (2c) of the pressure regulating body (2).

8. The pressure balancing structure of a beverage container according to claim 7, characterized in that: An annular accommodating groove (11) is formed at the connection between the pressure regulating body (2) and the cover cap (10), and the edge of the elastic diaphragm (8) is embedded in the accommodating groove (11).

9. The pressure balancing structure of a beverage container according to claim 4, characterized in that: One end of the second elastic member (7) abuts against the central area of the elastic diaphragm (8), and the other end of the second elastic member (7) abuts against the cover cap (10).

10. A pressure balancing structure for a beverage container according to any one of claims 1 to 9, characterized in that: The diameter (d2) of the communicating hole (2a4) close to the second pressure chamber (2a2) is larger than the diameter (d1) of the communicating hole (2a4) close to the first pressure chamber (2a1).

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