Two-piece type one-way ventilation valve

Abstract

The utility model provides a two-piece type one-way ventilation valve. The two-piece type one-way ventilation valve comprises a valve body and a valve piece connected with the valve body. The valve body comprises a base part and a protruding part, the base part is arranged in the circumferential direction of the protruding part, the protruding part is arranged in a protruding mode from the direction of the base part to the direction of the valve plate, and an air outlet channel is formed in the center of the protruding part and used for one-way air outlet; the valve plate comprises a mounting part, a sealing part and a plurality of connecting parts, the mounting part is arranged in the circumferential direction of the sealing part, the sealing part is used for blocking the air outlet channel, the connecting parts are arranged in the circumferential direction of the sealing part at equal intervals and used for connecting the sealing part and the mounting part, and a ventilation part is formed between every two adjacent connecting parts; and the ventilation part can be communicated with the air outlet channel. Through the mode, the production and assembly processes are simplified through the two-piece structure, the manufacturing cost is effectively reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air vent valves, in particular to a two-piece one-way air vent valve. Background Art

[0002] On common food packaging bags, in order to prevent food from being oxidized and deteriorated by air, the packaging bags are often sealed to prevent external air from entering the bags. However, some foods themselves will emit some odors or gases, which may have a certain impact on the foods themselves and cause the packaging bags to bulge and even burst. For example, after coffee beans are roasted, they will release carbon dioxide, and the carbon dioxide fills the packaging bag, causing it to bulge and even rupture. Therefore, it is necessary to timely discharge the air in the bag and prevent external air and water vapor from entering the packaging bag to cause food quality deterioration. Therefore, a ventilation hole is often provided on the packaging bag, and a one-way air vent valve is installed on the ventilation hole to realize one-way ventilation from the inside of the packaging bag to the outside of the packaging bag and prevent the packaging bag from bulging.

[0003] In the prior art, a one-way valve usually consists of three parts: a valve seat, a valve plate and a valve cover, which need to be assembled in sequence during use. Due to the relatively complex structure, it is easy to make mistakes during the assembly process, resulting in the inability to achieve one-way ventilation; or there is a situation where the valve body does not close properly after ventilation, resulting in external gas entering the interior and affecting the sealing effect; and the existing one-way valve has more structural layers, resulting in a higher production cost of the one-way valve. Summary of the Utility Model

[0004] To solve the above problems, the utility model proposes a two-piece one-way air vent valve with a simple structure and convenient assembly.

[0005] The main content of the utility model includes: a valve body and a valve plate connected to the valve body;

[0006] The valve body includes a base portion and a convex portion, the base portion is disposed circumferentially of the convex portion, the convex portion protrudes from the direction of the base portion towards the valve plate, and a gas outlet channel is provided at the center of the convex portion for one-way gas outlet;

[0007] The valve plate includes a mounting portion, a sealing portion and a plurality of connecting portions. The mounting portion is disposed circumferentially of the sealing portion. The sealing portion is used to block the gas outlet channel. The connecting portions are arranged at equal intervals along the circumferential direction of the sealing portion for connecting the sealing portion and the mounting portion. An air permeable portion is formed between two adjacent connecting portions, and the air permeable portion can communicate with the gas outlet channel.

[0008] Preferably, the connecting portion includes a first structural segment and a second structural segment that are bent in an L shape. One end of the first structural segment away from the second structural segment is connected to the mounting portion, and one end of the second structural segment away from the first structural segment is connected to the sealing portion.

[0009] Preferably, the thickness of the first structural segment is stepped, and the thickness of the end connected to the mounting portion is greater than the thickness of the end connected to the second structural segment.

[0010] Preferably, the thickness of the second structural segment does not exceed the thickness of the end where the first structural segment is connected to the second structural segment.

[0011] Preferably, a protruding annular abutting portion is circumferentially provided on one side of the air outlet channel close to the valve plate, and the sealing portion can be in interference abutment with the annular abutting portion.

[0012] Preferably, the center of the annular abutting portion forms a first chamber, and the side of the protruding portion away from the valve plate forms a second chamber. The air outlet channel communicates the first chamber and the second chamber, and the diameter of the first chamber is smaller than the diameter of the second chamber.

[0013] Preferably, one end face of the sealing portion and the annular abutting portion is set as an arc surface, and the arc surface protrudes in a direction away from the first chamber.

[0014] Preferably, the valve body and the valve plate are connected by snap connection. An inwardly protruding boss is circumferentially provided on the inner side wall of the base portion, and snap ribs are circumferentially and cooperatively provided on the outer wall of the mounting portion, and the snap ribs are clamped below the boss.

[0015] Preferably, the valve plate is made of an elastic material.

[0016] The beneficial effects of the present utility model are as follows: This application includes a valve body and a valve plate connected by snap connection. The two-piece structure simplifies the production and assembly process, effectively reduces the production cost, and improves the assembly efficiency; the valve plate is made of an elastic material, which includes a mounting portion, a plurality of connecting portions and a sealing portion. The connecting portion includes a first structural segment and a second structural segment arranged in an L-shaped structure. When the sealing portion is pushed outwards by pressure, the connecting portion can be deformed in segments, and the deformation process is synchronized to increase the speed of pulling the sealing portion back to its original position, prevent external air from entering, and improve the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a preferred embodiment;

[0018] Figure 2 is a cross-sectional structural schematic diagram of a preferred embodiment;

[0019] Figure 3 Schematic three-dimensional structure diagram of a valve plate in a preferred embodiment;

[0020] Reference numerals:

[0021] 1. Valve body; 11. Base part; 111. Boss; 12. Protruding part; 13. Air outlet channel; 14. Ring-shaped abutting part; 15. First chamber; 16. Second chamber;

[0022] 2. Valve plate; 21. Mounting part; 211. Buckling rib; 22. Connecting part; 221. First structural segment; 222. Second structural segment; 23. Sealing part; 24. Venting part. Detailed implementation manners

[0023] The following specifically describes the technical solution protected by the present utility model in conjunction with the accompanying drawings.

[0024] As Figure 1 shown, the present application proposes a two-piece one-way breathing valve, which includes a valve body 1 and a valve plate 2 connected to the valve body 1. Both the valve body 1 and the valve plate 2 are integrally formed, making the overall structure of the one-way breathing valve simple, consisting of only a two-piece structure. Compared with the one-way breathing valves in the prior art, the number of parts is reduced and the production cost is lowered.

[0025] As Figure 1-2 shown, the valve body 1 includes a base part 11 and a protruding part 12. The base part 11 of the valve body 1 is arranged circumferentially on the protruding part 12. The protruding part 12 protrudes from the direction of the base part 11 towards the valve plate 2. An air outlet channel 13 is provided at the center of the protruding part 12 for one-way air outlet. A protruding ring-shaped abutting part 14 is arranged circumferentially at one end of the air outlet channel 13 close to the valve plate 2. The ring-shaped abutting part 14 abuts against the valve plate 2. The center of the ring-shaped abutting part 14 forms a first chamber 15, and the side of the protruding part 12 away from the valve plate 2 forms a second chamber 16. The first chamber 15 and the second chamber 16 are communicated with each other through the air outlet channel 13. During use, the air outlet channel 13 of the valve body 1 cooperates with the exhaust port of the packaging container. The second chamber 16 corresponds to the exhaust port side of the packaging container. Gas flows from the second chamber 16 through the air outlet channel 13 into the first chamber 15. Preferably, the diameter of the first chamber 15 is smaller than the diameter of the second chamber 16 to ensure that a certain volume in the second chamber 16 can receive the gas discharged from the exhaust port. When the gas enters the first chamber 15, the air pressure generated by the gas in the first chamber acts on the valve plate concentratedly, which helps the gas to be discharged.

[0026] As Figure 1-3As shown in the figure, the valve plate 2 includes a mounting portion 21, a sealing portion 23, and a plurality of connecting portions 22. The mounting portion 21 is disposed circumferentially of the sealing portion 23. The sealing portion 23 is used to block the air outlet passage 13. The connecting portion 22 is used to connect the mounting portion 21 and the sealing portion 23, and when the mounting portion 21 is in contact with the valve body 1, it is used to pull the sealing portion 23 so that the sealing portion 23 and the valve body 1 are in interference contact with each other, ensuring that the sealing portion 23 can abut against the end of the annular abutting portion 14 to close the air outlet passage 13. The connecting portions 22 are arranged at equal intervals along the circumference of the sealing portion 23. An air permeable portion 24 is formed between two adjacent connecting portions 22. When the sealing portion 23 is not in contact with the annular abutting portion 14, the air permeable portion 24 can communicate with the air outlet passage 13. Preferably, the valve plate 2 is integrally made of an elastic material. When the pressure in the first chamber 15 reaches a certain level, the gas pressure pushes the sealing portion 23 away from the valve body 1. The connecting portion 22 undergoes a certain amount of deformation and stretching. After the gas is discharged from the air permeable portion 24, the elastic action of the connecting portion 22 pulls the sealing portion 23 back to the blocking position and abuts against the annular abutting portion 14, thereby preventing external gas from entering.

[0027] As Figure 1-3 shown, preferably, the connecting portion 22 includes a first structural segment 221 and a second structural segment 222 that are bent in an L shape. One end of the first structural segment 221 away from the second structural segment 222 is connected to the mounting portion 21, and one end of the second structural segment 222 away from the first structural segment 221 is connected to the sealing portion 23. After the sealing portion 23 is subjected to pressure, the connecting portion 22 can achieve segmented deformation, making the deformation states of a plurality of connecting portions 22 circumferentially of the sealing portion 23 more synchronous, effectively improving the speed at which the connecting portion 22 pulls the sealing portion 23 back to the abutting position, and preventing external air from entering the interior.

[0028] As Figure 1-3 shown, among them, the thickness of the first structural segment 221 is set in a stepped manner. Specifically, the thickness of the end of the first structural segment 221 connected to the mounting portion 21 is greater than the thickness of the end connected to the second structural segment 222, so as to improve the connection strength between the connecting portion 22 and the mounting portion 21 and prevent breakage between the connecting portion 22 and the mounting portion 21 during the stretching process of the connecting portion 22. Preferably, the thickness of the second structural segment 222 is not greater than the thickness of the end where the first structural segment 221 is connected to the second structural segment 222, ensuring that the connecting portion 22 as a whole has a certain connection strength and will not undergo tensile fracture while the connecting portion 22 can achieve segmented deformation.

[0029] As Figure 1-3 shown, preferably, one side end face of the sealing portion 23 and the annular abutting portion 14 is set as an arc surface, and the arc surface protrudes in a direction away from the first chamber 15, so as to more concentratedly act the air pressure in the first chamber 15 on the sealing portion 23, which helps to discharge the gas in a timely manner.

[0030] As Figure 1-3 shown, in this embodiment, the valve body 1 and the valve disc 2 are connected by snap-fitting, which effectively improves the assembly efficiency. Specifically, an inwardly protruding boss 111 is circumferentially provided on the inner side wall of the base portion 11, and a snap rib 211 is circumferentially provided on the outer wall of the mounting portion 21. The snap rib 211 is clamped below the boss 111 to realize the fixed connection between the valve body 1 and the valve disc 2. Preferably, the outer edges of the boss 111 and the snap rib 211 are both provided as arcs to improve the smoothness of snap-fitting.

[0031] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A two-piece one-way air vent valve, characterized in that, It mainly includes: A valve body and a valve plate connected to the valve body; The valve body includes a base portion and a convex portion. The base portion is disposed circumferentially of the convex portion. The convex portion protrudes from the direction of the base portion towards the valve plate. An air outlet passage is provided at the center of the convex portion for one-way air outlet; The valve plate includes a mounting portion, a sealing portion, and a plurality of connecting portions. The mounting portion is disposed circumferentially of the sealing portion. The sealing portion is used to block the air outlet passage. The connecting portions are arranged at equal intervals along the circumferential direction of the sealing portion for connecting the sealing portion and the mounting portion. An air permeable portion is formed between two adjacent connecting portions, and the air permeable portion can communicate with the air outlet passage.

2. The two-piece one-way air permeable valve according to claim 1, wherein The connecting portion includes a first structural segment and a second structural segment bent in an L shape. One end of the first structural segment away from the second structural segment is connected to the mounting portion, and one end of the second structural segment away from the first structural segment is connected to the sealing portion.

3. The two-piece one-way air permeable valve according to claim 2, wherein The thickness of the first structural segment is stepped, and the thickness of the end connected to the mounting portion is greater than the thickness of the end connected to the second structural segment.

4. The two-piece one-way air permeable valve according to claim 3, wherein The thickness of the second structural segment does not exceed the thickness of the end where the first structural segment is connected to the second structural segment.

5. The two-piece one-way air permeable valve according to claim 1, wherein A raised annular abutting portion is provided circumferentially on the side of the air outlet passage close to the valve plate, and the sealing portion can be in interference abutment with the annular abutting portion.

6. The two-piece one-way air permeable valve according to claim 5, wherein A first chamber is formed at the center of the annular abutting portion, and a second chamber is formed on the side of the convex portion away from the valve plate. The air outlet passage communicates the first chamber and the second chamber, and the diameter of the first chamber is smaller than the diameter of the second chamber.

7. The two-piece one-way air permeable valve according to claim 6, wherein One end face of the sealing portion and the annular abutting portion is set as an arc surface, and the arc surface protrudes towards the direction away from the first chamber.

8. The two-piece one-way air permeable valve according to claim 1, wherein The valve body and the valve plate are connected by snap fit. An inwardly protruding boss is provided circumferentially on the inner side wall of the base portion, and a snap rib is provided circumferentially on the outer wall of the mounting portion and is snapped below the boss.

9. The two-piece one-way air permeable valve according to claim 1, wherein The valve plate is made of an elastic material.

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