A packaging bag exhaust valve separating strength and sealing function

Abstract

This utility model relates to the field of exhaust valve technology and discloses an exhaust valve for packaging bags that separates strength and sealing function. It includes a valve cover, sealant, sealing oil, a valve body seat, and a packaging bag. The sealant is installed inside the valve body seat, with the sealant surface adhering to the valve body surface of the valve body seat. The sealing oil drips onto the center of the sealant surface. The valve cover is fastened to the valve body seat via the guide surface and positioning surface, with the positioning surface coinciding with the corresponding surface of the valve cover. After the sealing oil is fastened, tension causes the sealant surface to adhere to the annular surface of the valve cover. The valve cover has an air passage hole, forming an exhaust channel between the valve body seat and the sealant. The packaging bag has a hole communicating with the exhaust channel, thus achieving the separation of valve body strength and sealing function. The exhaust volume can be adjusted by replacing valve covers of different specifications without replacing the entire valve body structure, reducing the investment in production molds and processing resources.

Description

Technical Field

[0001] This utility model relates to the field of exhaust valve technology, specifically an exhaust valve for packaging bags that separates strength and sealing function. Background Technology

[0002] Air venting valves are a common packaging design element, primarily used to reduce air pressure inside the bag and improve product preservation conditions. These valves are typically installed in a small hole in the bag or designed as automatically opening and closing chambers. When the air pressure inside the bag is higher than the external pressure, the valve automatically opens to release excess air; when the pressure inside the bag drops, the valve automatically closes to prevent external air from entering. This effectively reduces the air content inside the bag, extending the shelf life of food, pharmaceuticals, and other products, and preventing the bag from deforming due to prolonged storage. With increasing market diversity, users demand higher strength and venting capacity from the valve body. The goal is to quickly expel excess gas while maintaining sufficient strength for efficient packaging and efficient material handling. To meet these market demands, producers must invest more resources across multiple stages, including mold making, manufacturing, and quality control.

[0003] In the existing technology, the strength structure and sealing function of the packaging bag exhaust valve are often integrated into the same component, making it difficult to simultaneously meet the requirements of high strength and flexible adjustment of exhaust volume. To meet the requirements of different exhaust volumes, the entire valve body structure needs to be replaced, which increases the investment in production molds and the cost of product type switching.

[0004] In view of this, the present invention solves the above-mentioned technical problems by proposing a packaging bag exhaust valve that separates strength and sealing function. Utility Model Content

[0005] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for a packaging bag exhaust valve that separates strength and sealing function. Firstly, it achieves the separation of valve body strength and sealing function. The exhaust volume can be adjusted by replacing valve caps of different specifications without replacing the entire valve body structure, reducing the investment in production molds and processing resources, and enabling rapid switching between various product types. Secondly, the valve cap and valve body seat form a stable overall structure through fastening and welding, significantly improving the load-bearing strength of the valve body and making it suitable for more load-bearing scenarios. Finally, the combination of sealing oil and sealant achieves a reliable one-way sealing function. During exhaust, the sealing surface is pushed open by the air pressure inside the packaging bag, and the sealing state is automatically restored by external air pressure after exhaust, ensuring stable sealing performance.

[0006] This utility model provides the following technical solution: a packaging bag exhaust valve that separates strength and sealing function, including a valve cover, sealant, sealing oil, valve body seat and packaging bag;

[0007] The sealant is installed inside the valve body seat, and the sealant surface of the sealant is in contact with the valve body surface of the valve body seat. The sealing oil drips onto the center of the sealant surface.

[0008] The valve cover is fastened to the valve body seat through the guide surface and the positioning surface of the valve body seat, so that the arc edge surface of the valve cover completely coincides with the valve body seat surface of the valve body seat.

[0009] The positioning surface coincides with the corresponding surface of the valve cover;

[0010] After the sealing oil is engaged, the tension causes the sealing surface of the sealant to adhere to the annular surface of the valve cover, thereby achieving a sealing function.

[0011] The valve cover is provided with an air vent, and an exhaust channel is formed between the valve body seat and the sealant. The packaging bag is provided with a packaging bag hole that communicates with the exhaust channel.

[0012] As a preferred embodiment of this utility model, there are three types of valve covers, each with a different size of vent hole.

[0013] As a preferred technical solution of this utility model, after the valve cover and the valve body seat are fastened together, they are welded together at the sealing line to form an integral structure.

[0014] In a preferred embodiment of this invention, the sealant is a rubber sealant, and the sealing surface of the sealant is in close contact with the annular surface of the valve cover.

[0015] As a preferred technical solution of this utility model, the exhaust channel is formed by the annular surface of the valve body seat, the sealing surface of the sealant, the side surface of the valve body seat, and the corresponding surface of the packaging bag.

[0016] As a preferred technical solution of this utility model, the valve cover is guided by the guide surface and positioned by the positioning surface during the fastening process.

[0017] As a preferred embodiment of this utility model, the sealing oil is evenly distributed between the sealing surface of the sealant and the mating surface of the valve cover annular surface.

[0018] As a preferred embodiment of this utility model, the pressure-bearing surface of the sealant is an arc-shaped convex structure, with the apex of the pressure-bearing surface facing the inside of the packaging bag.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model achieves the separation of valve body strength and sealing function. The exhaust volume can be adjusted by replacing the valve cover of different specifications without replacing the entire valve body structure. This reduces the investment in production molds and processing resources and enables rapid switching between multiple product types.

[0021] 2. The valve cover and valve body seat of this utility model form a stable overall structure through fastening and welding, which significantly improves the load-bearing strength of the valve body and is suitable for more load-bearing scenarios.

[0022] 3. The combination of sealing oil and sealant in this utility model achieves a reliable one-way sealing function. When venting, the sealing surface is pushed open by the air pressure inside the packaging bag. After venting is completed, the sealing state is automatically restored by the external air pressure, and the sealing performance is stable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the hole structure of the packaging bag of this utility model;

[0025] Figure 3 This is a cross-sectional view of the present invention.

[0026] Figure 4 This is a schematic diagram of the sealing line structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the air passage structure of this utility model.

[0028] In the diagram: 1. Valve cover; 12. Arc edge surface; 13. Annular surface of valve cover; 14. Vent hole; 15. Corresponding surface of valve cover; 2. Sealant; 21. Sealant surface; 22. Sealing surface; 23. Pressure-bearing surface; 3. Sealing oil; 4. Valve body seat; 41. Inlet surface; 42. Valve body seat surface; 43. Positioning surface; 44. Valve body surface; 45. Annular surface of valve body seat; 46. Side of valve body seat; 5. Packaging bag; 51. Packaging bag hole; 52. Corresponding surface of packaging bag; 6. Internal gas; 7. External gas; 8. Sealing line. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-5As shown, a packaging bag exhaust valve that separates strength and sealing function includes a valve cover 1, a sealant 2, a sealing oil 3, a valve body seat 4, and a packaging bag 5.

[0031] The sealant 2 is installed inside the valve body seat 4, and the sealant surface 21 of the sealant 2 is in contact with the valve body surface 44 of the valve body seat 4. The sealing oil 3 drips onto the center of the sealant surface 21 of the sealant 2.

[0032] The valve cover 1 is fastened to the valve body seat 4 through the guide surface 41 and the positioning surface 43, so that the arc edge surface 12 of the valve cover 1 completely coincides with the valve body seat surface 42 of the valve body seat 4.

[0033] The positioning surface 43 coincides with the valve cover corresponding surface 15 of the valve cover 1;

[0034] After the sealing oil 3 is engaged, the tension causes the sealing surface 21 of the sealant 2 to adhere to the valve cover annular surface 13 of the valve cover 1, thereby achieving the sealing function.

[0035] The valve cover 1 is provided with an air passage 14, and an exhaust channel is formed between the valve body seat 4 and the sealant 2. The packaging bag 5 is provided with a packaging bag hole 51 that communicates with the exhaust channel.

[0036] There are three types of valve covers 1, each with a different size of vent hole 14;

[0037] There are three types of exhaust vents 14: large exhaust vent 14, medium exhaust vent 14 and small exhaust vent 14.

[0038] The large exhaust vent 14 is mainly used when the internal gas pressure 6 of the packaging bag 5 is high and needs to be vented quickly (such as the initial venting after packaging of fluffy materials). When selecting the valve cover 1 with the large exhaust vent 14, the internal gas 6 can rush in simultaneously through multiple large-diameter vent 14, quickly pushing open the sealing rubber surface 21 with sealing oil 3 and the annular surface 13 of the valve cover to form a larger gap, significantly improving the venting rate and balancing the pressure inside and outside the bag in a short time.

[0039] The medium exhaust vent 14 is suitable for scenarios with medium pressure requirements (such as packaging of granular materials). Its exhaust rate is between that of the large exhaust vent 14 and the small exhaust vent 14. It can avoid slight leakage of materials caused by excessive exhaust and meet the requirements of conventional exhaust efficiency. Stable exhaust is achieved through a moderate vent diameter.

[0040] The small exhaust vent 14 is suitable for low-pressure, slow exhaust scenarios (such as powder packaging). The small diameter design reduces the impact force when the gas is discharged, preventing powder from overflowing with the airflow. At the same time, the tension of the sealing oil 3 quickly restores the seal, ensuring the packaging is airtight.

[0041] After the valve cover 1 and the valve body seat 4 are fastened together, they are welded together at the sealing line 8 to form an integral structure;

[0042] The sealant 2 is a rubber sealant, and the sealing surface 22 of the sealant 2 is in close contact with the annular surface 13 of the valve cover 1.

[0043] The exhaust channel is formed by the annular surface 45 of the valve body seat 4, the sealing surface 22 of the sealant 2, the side surface 46 of the valve body seat 4, and the corresponding surface 52 of the packaging bag 5.

[0044] The valve cover 1 is guided by the guide surface 41 and positioned by the positioning surface 43 during the fastening process.

[0045] The sealing oil 3 is evenly distributed between the sealing surface 21 of the sealant 2 and the mating surface of the valve cover annular surface 13 of the valve cover 1.

[0046] The pressure-bearing surface 23 of the sealant 2 has an arc-shaped convex structure, with the apex of the pressure-bearing surface 23 facing the inside of the packaging bag 5, so as to enhance the squeezing and sealing effect of the sealant 2 by the external gas pressure 7.

[0047] During assembly, sealant 2 is placed into valve body seat 4 by displacement, so that sealant surface 21 is in contact with valve body surface 44; sealing oil 3 is dripped onto the center of sealant surface 21 of sealant 2 by process; then valve cover 1 is displaced, guided and positioned by guide surface 41 and positioning surface 43, and fastened in valve body seat 4, so that arc edge surface 12 is completely overlapped with valve body seat surface 42, and positioning surface 43 is overlapped with valve cover corresponding surface 15 of valve cover 1, realizing effective fastening of valve cover 1 and valve body seat 4. After fastening, the tension of sealing oil 3 forces sealant surface 21 of sealant 2 to adhere to valve cover annular surface 13 of valve cover 1, realizing initial sealing function;

[0048] In the exhaust state, when the pressure of the internal gas 6 of the packaging bag 5 is higher than the pressure of the external gas 7, the internal gas 6 passes through the vent 14 of the valve cover 1, pushing open the corresponding surface 15 of the valve cover (which is coated with sealing oil 3) and the sealing adhesive surface 21, creating a gap. The internal gas 6 then passes through the channel formed by the annular surface 45 of the valve body seat 4 and the sealing surface 22 of the sealing adhesive 2, and then through the channel formed by the side 46 of the valve body seat and the corresponding surface 52 of the packaging bag, as well as the packaging bag hole 51, to be discharged to the outside. After the gas inside the packaging bag 5 is completely discharged, the pressure of the external gas 7 forces the sealing adhesive 2 from the pressure-bearing surface 23 towards the annular surface 13 of the valve cover 1, making the sealing surface 22 and the annular surface 13 of the valve cover completely adhered, restoring the sealing state and achieving a one-way sealing function.

[0049] Under load, the valve cover 1 and the valve body seat 4 are fastened together to form a stable structure, and the two are welded together at the sealing line 8 to form a whole, which greatly improves the overall compressive strength of the valve body.

[0050] There are three types of exhaust vents 14: large exhaust vent 14, medium exhaust vent 14, and small exhaust vent 14. All three types of exhaust vents 14 are integrally formed with the valve cover 1. The dimensions of the interlocking structure, such as the arc edge surface 12 and the corresponding surface 15 of the valve cover 1, are consistent. The exhaust volume can be adjusted only by the difference in the diameter of the exhaust vent 14. There is no need to change other components such as the valve body seat 4 and the sealant 2. This achieves the design goal of "changing the exhaust specification by replacing a single valve cover 1", reducing production and usage costs.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A packaging bag exhaust valve with separate strength and sealing function, comprising a valve cover (1), sealant (2), sealing oil (3), valve body seat (4), and packaging bag (5); characterized in that The sealant (2) is installed inside the valve body seat (4), and the sealant surface (21) of the sealant (2) is in contact with the valve body surface (44) of the valve body seat (4). The sealing oil (3) drips onto the center of the sealant surface (21) of the sealant (2). The valve cover (1) is fastened to the valve body seat (4) by the guide surface (41) and the positioning surface (43) of the valve body seat (4), so that the arc edge surface (12) of the valve cover (1) is completely overlapped with the valve body seat surface (42) of the valve body seat (4); The positioning surface (43) coincides with the valve cover corresponding surface (15) of the valve cover (1); After the sealing oil (3) is fastened, the sealing surface (21) of the sealant (2) adheres to the valve cover annular surface (13) of the valve cover (1) through tension, thereby achieving the sealing function; The valve cover (1) is provided with an air passage (14), and an exhaust channel is formed between the valve body seat (4) and the sealant (2). The packaging bag (5) is provided with a packaging bag hole (51) that communicates with the exhaust channel.

2. A package vent valve having strength and sealing functions separated according to claim 1, characterized in that: There are three types of valve covers (1), each of which has a different size of vent hole (14).

3. A strength and seal functionally separated package vent valve according to claim 1, characterized in that: After the valve cover (1) and the valve body seat (4) are fastened together, they are welded together at the position of the sealing line (8) to form an integral structure.

4. A strength and seal functionally separated package vent valve according to claim 1, characterized in that: The sealant (2) is a rubber sealant, and the sealing surface (22) of the sealant (2) is in close contact with the annular surface (13) of the valve cover (1).

5. A strength and seal functionally separated package vent valve according to claim 1, characterized in that: The exhaust channel is formed by the valve body seat annular surface (45) of the valve body seat (4), the sealing surface (22) of the sealant (2), the valve body seat side surface (46) of the valve body seat (4), and the corresponding surface (52) of the packaging bag (5).

6. The packaging bag exhaust valve with separate strength and sealing function according to claim 1, characterized in that: The valve cover (1) is guided by the guide surface (41) and positioned by the positioning surface (43) during the fastening process.

7. The packaging bag exhaust valve with separate strength and sealing function according to claim 1, characterized in that: The sealing oil (3) is evenly distributed between the sealing surface (21) of the sealant (2) and the mating surface of the valve cover annular surface (13) of the valve cover (1).

8. The packaging bag exhaust valve with separate strength and sealing function according to claim 1, characterized in that: The pressure-bearing surface (23) of the sealant (2) is an arc-shaped protrusion structure, with the apex of the pressure-bearing surface (23) facing the inside of the packaging bag (5).

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