A vented plug

Abstract

The utility model relates to a kind of breathable plugs, including outer sleeve and breathable plug, outer sleeve is hollow cylindrical structure, the top of outer sleeve is equipped with top cover, there are multiple breathable holes on the top cover, breathable plug is detachably installed in outer sleeve, breathable plug includes cavity, multiple outer clamping strips are set on the outer wall of cavity top end, outer clamping strip and the inner wall of outer sleeve realize clamping joint, first inner cavity and second inner cavity are equipped in cavity, first inner cavity is located below and is communicated with second inner cavity, the middle of first inner cavity is equipped with through-hole, through-hole diameter is less than the inner diameter of first inner cavity, breathable membrane is equipped above through-hole, breathable membrane is attached on second inner cavity;The bottom of first inner cavity extends annular groove downward, circular breathable liquid-blocking membrane is equipped in annular groove, the diameter of breathable liquid-blocking membrane is greater than the diameter of through-hole, slightly less than the inner diameter of annular groove, annular limiting piece is equipped below breathable liquid-blocking membrane, annular limiting piece is cylindrical hollow structure and annular groove embeddedly connected.

Description

Technical Field

[0001] This utility model relates to a bottle stopper, and more particularly to a breathable stopper. Background Technology

[0002] When liquids are stored in sealed containers, changes in ambient temperature or air pressure often generate volatile gases or expansion pressure. If these are not released in time, the containers can easily deform or crack, posing significant safety hazards. To avoid such problems, venting devices are usually installed on the containers to allow internal gases to be released while preventing liquid spillage.

[0003] For example, Chinese patent application publication number CN112320051B, entitled "A Vent Plug," discloses a structure for venting a container, comprising an outer casing and a vent plug. This vent plug features a multi-cavity structure. A cross-shaped support is provided in the lower inner cavity to fix a silicone sheet, and a cover plate is provided in the upper inner cavity. A vent membrane is installed on the cover plate to achieve unidirectional gas permeation and liquid barrier functions. This venting structure allows gas from the container to exit sequentially through the through-holes in the cross-shaped support, the silicone sheet, the through-holes in the cover plate, the vent membrane, and the vent holes in the top cover.

[0004] While the above structure can achieve basic air permeability and liquid barrier functions, it still has the following shortcomings in practical use:

[0005] (1) The silicone sheet in this structure needs to be installed by supporting components, usually by hot melting or adhesive bonding, which increases the assembly complexity and failure risk. In addition, the cross support structure is prone to structural deformation or breakage due to thin walls during injection molding, affecting product consistency and durability.

[0006] (2) The upper cover plate structure is a plate-shaped component. It is embedded in the inner cavity and requires high positioning accuracy. The cover plate itself also needs to have small through holes to accommodate the installation of the breathable membrane. The processing and assembly process is relatively complicated and the sealing performance is easily affected by dimensional tolerances.

[0007] (3) The diameter of the silicone sheet used in this structure is smaller than the inner diameter of the first inner cavity. Gas is discharged through the gaps around the silicone sheet. However, when the container shakes violently or when the liquid is impacted, the liquid may also splash through the gaps onto the surface of the upper breathable membrane, causing the membrane to become wet or blocked, affecting the breathability. In addition, the vertical distance between the silicone sheet and the breathable membrane is small, only the height of the second inner cavity. The overall gas flow path is short and the buffer space is limited, which can easily cause local flow velocity concentration, impacting the membrane and thus reducing its service life and stability. Utility Model Content

[0008] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a breathable plug with optimized structure, convenient assembly, and a reasonable airflow path. This breathable plug improves assembly efficiency while enhancing structural strength, extending the gas flow path, mitigating airflow impact, and effectively preventing liquid splashing into the breathable membrane, thereby improving overall breathability and liquid-resistant stability.

[0009] The technical solution adopted by this utility model to solve its technical problem is as follows: a breathable plug, including an outer sleeve and a breathable plug, wherein the outer sleeve is a hollow cylindrical structure, and a top cover is provided at the top of the outer sleeve. The top cover has multiple breathable holes. The breathable plug is detachably installed in the outer sleeve. The breathable plug includes a cavity, which is engaged with the inner wall of the outer sleeve. The cavity is provided with a first inner cavity and a second inner cavity. The first inner cavity is located below and communicates with the second inner cavity. The inner diameter of the first inner cavity is smaller than the inner diameter of the second inner cavity. A through hole is provided in the middle of the first inner cavity. A breathable membrane is provided above the through hole and is attached to the second inner cavity. An annular groove extends downward from the bottom of the first inner cavity. A circular breathable liquid-resistant film is provided in the annular groove. The diameter of the breathable liquid-resistant film is larger than the diameter of the through hole and slightly smaller than the inner diameter of the annular groove. An annular limiting member is provided below the breathable liquid-resistant film. The annular limiting member is a cylindrical hollow structure and is embedded in the annular groove.

[0010] Furthermore, a plurality of evenly distributed outer locking strips are provided on the outer wall of the top of the cavity, and the outer surfaces of the plurality of outer locking strips are arranged along the same circumferential path, the diameter of which is slightly larger than the inner diameter of the outer sleeve seat.

[0011] Furthermore, the vent holes are arc-shaped and evenly distributed around the outer periphery of the top cover, with a quantity of three.

[0012] Furthermore, the annular groove has a threaded section on its outer periphery.

[0013] Furthermore, the outer casing and the vent plug are integrally molded injection-molded structures.

[0014] Furthermore, the breathable membrane is a microporous membrane that is permeable to gas but impermeable to liquid.

[0015] The beneficial effects of this utility model are:

[0016] (1) This utility model eliminates the cross support used for installing silicone sheets in the traditional structure and replaces it with a through hole structure, which helps to improve the overall consistency and structural strength of injection molding.

[0017] (2) This utility model omits the traditional cover plate structure and adopts a ring-shaped limiting component. This cylindrical structure is more convenient for embedded installation and simplifies the assembly process.

[0018] (3) This utility model eliminates the silicone sheet with gaps in the traditional structure and replaces it with a breathable liquid-blocking film covering the through holes at the bottom of the cavity, which has the function of blocking liquid and allowing air, and can effectively prevent liquid from surging up. The breathable liquid-blocking film and the upper breathable film span the first and second inner cavities, forming a longer air guiding path and buffer space, which helps to reduce the impact of airflow, reduce the risk of liquid splashing onto the breathable film, and improve the overall sealing reliability and service life of the breathable film. Attached Figure Description

[0019] Figure 1 This is an exploded view of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the breathable plug structure of this utility model;

[0022] In the figure, 1-outer sleeve; 11-vent hole; 2-ventilation membrane; 3-ventilation plug; 31-ring body; 32-threaded part; 33-outer retaining strip; 34-first inner cavity; 341-through hole; 35-second inner cavity; 36-annular groove; 4-ventilation and liquid-resistant film; 5-annular limiting element. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] like Figure 1 As shown, this utility model provides a breathable plug, including an outer casing 1 and a breathable plug 3.

[0025] The outer casing 1 is a hollow cylindrical structure used for installation at the vent of the container. It has a top cover with multiple vent holes 11. Preferably, the vent holes 11 are arc-shaped, centrally symmetrically distributed, and number three, allowing gas to be released from the inside out.

[0026] The vent plug 3 is detachably inserted into the inner cavity of the outer sleeve 1. It includes an integrally formed ring 31. Four evenly distributed outer locking strips 33 are provided on the top outer wall of the ring 31. The outer surfaces of the four outer locking strips 33 are arranged along the same circumferential path, and the diameter of this circumference is slightly larger than the inner diameter of the outer sleeve 1 to achieve a locking fit with the inner wall of the outer sleeve. The outer circumference of the ring 31 also has a threaded portion 32 for threaded connection with the threaded opening of the container to achieve a seal. The vent plug 3 has a first inner cavity 34 and a second inner cavity 35 arranged sequentially inside. The first inner cavity 34 is located below the second inner cavity 35, and the two are interconnected. The inner diameter of the first inner cavity 34 is smaller than the inner diameter of the second inner cavity 35, forming a space for accommodating and guiding air. A through hole 341 is provided in the middle of the first inner cavity 34, such as... Figure 3 As shown, through hole 341 is used to form a gas discharge channel.

[0027] like Figure 2 As shown, a breathable membrane 2 is provided above the through hole 341. The breathable membrane 2 is a gas-permeable thin film, whose main function is to prevent external particles or dust from entering the container while allowing gas to escape freely. The breathable membrane 2 can be attached to the outer periphery of the upper surface of the second inner cavity 35 with adhesive, or, since the size of the breathable membrane 2 fits perfectly within the circle formed by the four outer clamping strips 33, the breathable membrane 2 can be directly set on the upper surface of the cavity 31 for easy replacement.

[0028] Below the through hole 341, an annular groove 36 extends integrally from the bottom of the first inner cavity 34. The annular groove 36 is a downward-opening ring structure. A breathable and liquid-resistant film 4 is disposed within the annular groove 36. The breathable and liquid-resistant film 4 is a flexible sheet structure made of a polymer material with hydrophobic and microporous structures, such as PU film, giving it liquid-resistant and breathable functions. Its diameter is larger than the diameter of the through hole 341 and slightly smaller than the inner diameter of the annular groove 36. To ensure the stable positioning of the breathable and liquid-resistant film 4 within the annular groove 36, an annular limiting member 5 is installed below it. The annular limiting member 5 is a hollow cylindrical ring structure, and its outer ring size is adapted to the inner wall of the annular groove 36. It is installed through a fitting connection. When the annular limiting member 5 is inserted into the annular groove 36, the breathable and liquid-resistant film 4 is clamped between the annular limiting member 5 and the bottom of the annular groove 36, achieving stable structural positioning without the need for hot-melt or adhesive fixing, thus improving assembly efficiency and reliability.

[0029] like Figure 2As shown, after the vent plug 3 is assembled, the gas generated inside the container can be discharged sequentially along the following path: the gas first passes through the bottom permeable liquid-blocking membrane 4 from inside the container, flows into the first inner cavity 34 through the through hole 341, then enters the second inner cavity 35, then passes through the permeable membrane 2, and finally exits from the vent hole 11 of the outer casing 1. In this structure, the permeable liquid-blocking membrane 4 is set below the through hole as a liquid barrier; the permeable membrane 2 is set above the through hole for dust prevention and gas guidance. The two work together to form a multi-stage gas guidance structure with clear division of labor, effectively improving exhaust efficiency and liquid-proof stability.

[0030] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A vent plug, comprising an outer casing and a vent plug, wherein the outer casing is a hollow cylindrical structure, a top cover is provided at the top of the outer casing, the top cover has multiple vent holes, the vent plug is detachably installed inside the outer casing, the vent plug includes a cavity, the cavity being engaged with the inner wall of the outer casing, characterized in that: The cavity contains a first inner cavity and a second inner cavity. The first inner cavity is located at the bottom and communicates with the second inner cavity. The inner diameter of the first inner cavity is smaller than that of the second inner cavity. A through hole is provided in the middle of the first inner cavity, and a breathable membrane is provided above the through hole. The breathable membrane is attached to the second inner cavity. An annular groove extends downward from the bottom of the first inner cavity. A circular breathable and liquid-resistant film is provided in the annular groove. The diameter of the breathable and liquid-resistant film is larger than the diameter of the through hole and slightly smaller than the inner diameter of the annular groove. An annular limiting member is provided below the breathable and liquid-resistant film. The annular limiting member has a cylindrical hollow structure and is embedded in the annular groove.

2. The breathable plug according to claim 1, characterized in that: Multiple evenly distributed outer locking strips are provided on the outer wall of the top of the cavity. The outer surfaces of the multiple outer locking strips are arranged along the same circumferential path, and the diameter of the circumference is slightly larger than the inner diameter of the outer sleeve seat.

3. The breathable plug according to claim 1, characterized in that: The ventilation holes are arc-shaped and are evenly distributed on the outer periphery of the top cover, with a quantity of three.

4. The breathable plug according to claim 1, characterized in that: The annular groove has a threaded section on its outer periphery.

5. A breathable plug according to claim 1, characterized in that: The outer casing and the vent plug are integrally molded injection structures.

6. A breathable plug according to claim 1, characterized in that: The breathable membrane is a microporous membrane that is permeable to gas but impermeable to liquid.

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