Multifunctional one-way breather valve for packaging

Abstract

The utility model provides a kind of multifunctional one-way breather valve for packaging. Specifically, a multifunctional one-way breather valve for packaging with simple structure, easy production, strong sealing and wide application range is provided. The multifunctional one-way breather valve for packaging includes a mounting seat, a filter cartridge and an end cover. The mounting seat is provided with a first boss and a recess, and the filter cartridge is provided with a second boss. The two are nested and coincided and attached to the inner wall of the packaging film to form a mechanical seal. A limiting column is arranged in the filter cartridge, and its height is matched with the depth of the end cover to prevent the filter core from being pressed, deviated and blocked. The filter cartridge is interference-fitted with the mounting seat, and the end cover is connected with the mounting seat through threads, supporting quick disassembly and replacement of the filter core. The utility model can be widely applied in the field of packaging materials.

Description

Technical Field

[0001] This utility model relates to the field of packaging materials technology, specifically to a multifunctional one-way ventilation valve for packaging. Background Technology

[0002] Traditional packaging vent valves have the following drawbacks: Poor installation stability: air leakage is easy at the junction of the valve body and the packaging film; the simple design of the boss leads to it falling off under pressure (such as CN201412564Y, which only relies on a single layer of silicone adsorption for sealing); difficult filter element replacement: the filter element and valve body are integrated, and the whole thing needs to be replaced after failure; insufficient airflow control: the lack of a limiting structure may cause the filter element to move and block the air port, affecting one-way air permeability.

[0003] While existing technologies (such as CN110214113A) attempt to improve sealing performance, they still rely on complex hot-melt processes, increasing production costs. This invention solves the above problems through a modular structure and interlocking boss design. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a multi-functional one-way ventilation valve for packaging that is simple in structure, easy to produce, has strong sealing performance and wide applicability.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multifunctional one-way vent valve for packaging includes a packaging film, a mounting base, a filter cartridge, and an end cap. The mounting base has a first protrusion on one outer side and a recess on the same inner side. The filter cartridge has a second protrusion on one outer outer side. The outer side of the filter cartridge is movably connected to the outer side of the mounting base. The recess coincides with the second protrusion. Both the first and second protrusions are located within the packaging film. A filter element is located at the other end of the filter cartridge. The other end of the mounting base is fixedly connected to the end cap. An air vent is provided on the outer side of the end cap. Air holes are provided on the packaging film.

[0006] Furthermore, a limiting post is provided between the filter cartridge and the filter element, the height of which matches the depth of the end cap to prevent the filter element from shifting under pressure.

[0007] Furthermore, the filter cartridge and the mounting base are interference-fitted to prevent gas leakage.

[0008] Furthermore, the end faces of the first boss and the second boss are horizontal, nested and overlapping, forming a mechanical interlock.

[0009] Furthermore, the total height of the limiting post and the filter element cylinder does not exceed the depth of the end cap, thereby enhancing structural strength.

[0010] Furthermore, the mounting base and the end cap are connected by threads to increase airtightness.

[0011] Compared with existing multi-functional one-way ventilation valves for packaging, this utility model has at least the following beneficial effects: High-sealing and pressure-resistant structure The first protrusion of the mounting base and the second protrusion of the filter cartridge are horizontally fitted together and nested inside the packaging film to form a mechanical interlock. Combined with the interference fit between the filter cartridge and the mounting base, a glue-free seal is achieved.

[0012] Filter element stable anti-clogging design The limiting post precisely controls the filter element, and the sum of its height and the filter element cylinder height does not exceed the end cap depth to prevent the filter element from being deformed by pressure and blocking the air port, thus ensuring 100% airflow smoothness.

[0013] Multifunctional scene adaptability The filter element can be replaced with different types of filters depending on the packaging type.

[0014] Production assembly optimization The concave platform and the second convex platform automatically nest and overlap, simplifying the assembly process. The modular design supports injection molding mass production and improves the yield rate. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the installation structure of the multifunctional one-way ventilation valve for packaging. Figure 2 It is the aforementioned Figure 1 A structural diagram from another angle; Figure 3 This is an exploded view of the multifunctional one-way vent valve for packaging. Figure 4 It is the aforementioned Figure 3 A structural diagram from another angle.

[0017] In the diagram: 1. Packaging film; 2. Air vent; 3. Mounting base; 4. First boss; 5. Recess; 6. Filter cartridge; 7. Second boss; 8. Filter cartridge; 9. End cap; 10. Air port; 11. Limiting post. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other. Example

[0021] like Figure 1-4 As shown, the multifunctional one-way vent valve for packaging of this utility model includes a mounting base 3, a filter cartridge 6, and an end cap 9. High sealing performance is achieved through mechanical interlocking and interference fit. The specific implementation process is as follows: Pre-treatment of mounting base 3: A first protrusion 4 with a diameter of 8mm and a height of 0.5mm is machined on the outer side of one end of the HDPE mounting base 3, and a recess 5 with a depth of 0.8mm is machined on the inner side. The end face of the first protrusion 4 is strictly kept horizontal to ensure uniform force during heat sealing with the packaging film 1. A second protrusion 7 with a diameter of 7.9mm and a height of 0.8mm is correspondingly machined on the outer side of the filter cartridge 6, forming a nested overlapping structure with the recess 5 of the mounting base. When the filter cartridge 6 is inserted into the mounting base 3, an interference fit of 0.08mm is used to achieve a glue-free seal using the material's elasticity. The first protrusion 4 and the second protrusion 7 are embedded together in the interlayer of the packaging film 1 to form a double anchoring point, which can resist a pressure difference impact of 30kPa. Filter element 8 limiting mechanism: A limiting post 11 with a height of 3mm is vertically set inside the filter element cylinder 6. The total height of the limiting post 11 and the cylinder body is strictly controlled to be 4.5mm, which is less than the 5mm cavity depth of the end cap 9. This ensures that the compression space of the filter element 8 is ≤0.5mm, preventing the PTFE filter membrane from deforming and blocking the airflow. End cap 9 sealing connection: The end cap 9 is screwed into the mounting base 3 through an M12×0.75 thread. Its surface has eight φ0.6mm air ports 10 arranged in a ring, forming a one-way exhaust channel. It automatically opens when the internal air pressure is >5kPa.

Claims

1. A multifunctional one-way breathable valve for packaging, comprising a packaging film (1) characterized in that: Includes a mounting base (3), a filter cartridge (6), and an end cap (9). The mounting base (3) has a first protrusion (4) on one side and a recess (5) on the same side. The filter cartridge (6) has a second protrusion (7) on one side. The filter cartridge (6) is movably connected to the mounting base (3). The recess (5) coincides with the second protrusion (7). The first protrusion (4) and the second protrusion (7) are both located inside the packaging film (1). The filter cartridge (6) has a filter element (8) on the other side. The mounting base (3) is fixedly connected to the end cap (9). The end cap (9) has an air vent (10) on its outer side. The packaging film (1) has an air hole (2).

2. The multifunctional one-way ventilation valve for packaging according to claim 1, characterized in that: A limiting post (11) is provided between the filter cartridge (6) and the filter element (8).

3. The multifunctional one-way ventilation valve for packaging according to claim 1, characterized in that: The filter cartridge (6) and the mounting base (3) are in an interference fit.

4. The multifunctional one-way ventilation valve for packaging according to claim 1, characterized in that: The end faces of the first boss (4) and the second boss (7) are horizontal.

5. The multifunctional one-way ventilation valve for packaging according to claim 1, characterized in that: The total height of the limiting post (11) and the filter cartridge (6) does not exceed the depth of the end cap (9).

6. The multifunctional one-way vent valve for packaging according to claim 1, characterized in that: The mounting base (3) and the end cap (9) are connected by threads.

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