Bag mouth structure for filling liquid sealing bag

Abstract

The utility model provides a bag mouth structure for filling a liquid sealing bag, which is applied to the technical field of liquid sealing bags and is characterized by comprising a bag mouth and a one-way valve component mounted in the bag mouth, the one-way valve assembly comprises a sealing rubber plug and a lining which are arranged in the bag mouth, and a sealing face is formed between the sealing rubber plug and the lining through the elastic force effect of the sealing rubber plug. The sealing rubber plug has the technical effects that the sealing rubber plug has certain hardness and rebound resilience, certain pressure is applied to the sealing rubber plug, so that the sealing rubber plug can be shrunk, and a liquid channel is formed between the sealing rubber plug and the bushing, so that a liquid product can be conveniently filled and poured; when the external force is removed, the sealing rubber plug can rebound and abut against the lining through the elastic force of the sealing rubber plug, and a sealing face is formed between the sealing rubber plug and the lining to prevent medium backflow; and the bag mouth can be quickly opened and closed.

Description

Technical Field

[0001] This utility model relates to the field of liquid sealing bag technology, and in particular to a bag mouth structure for filling liquid sealing bags. Background Technology

[0002] Currently, the filling port of existing liquid food or beverage sealed bags is a straight-through structure. After filling, the sealing bag needs to be screwed on with an installation cap in time to achieve the sealing function. However, in actual production or use, if the installation cap is not screwed on in time after filling, or if the installation cap is forgotten or not put on in time after use, the product inside the sealed bag will be oxidized or deteriorated, resulting in waste of liquid products. Utility Model Content

[0003] The purpose of this invention is to provide a bag mouth structure for filling liquid sealing bags, which has the advantage of providing good internal sealing performance even after the sealing bag has been opened and used.

[0004] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0005] A nozzle structure for filling a liquid-sealed bag includes a nozzle and a one-way valve assembly installed inside the nozzle;

[0006] The one-way valve assembly includes a sealing plug and a bushing disposed inside the bag opening. The sealing plug forms a sealing surface with the bushing through its own elasticity.

[0007] In one embodiment of this utility model, a connecting thread is provided on the outer circumference of the bag mouth.

[0008] In one embodiment of the present invention, a mounting base is integrally formed at the bottom of the bag mouth, and the mounting base is provided with a through hole communicating with the bag mouth.

[0009] In one embodiment of the present invention, a support frame is integrally formed on the mounting base; a guide rod coaxially arranged with the bag mouth is integrally formed on the support frame, and the sealing plug is sleeved on the guide rod;

[0010] The bushing is fixed to the inner wall of the bag opening above the sealing plug.

[0011] In one embodiment of the present invention, the sealing plug includes a guide post and a sealing block fixed on the guide post.

[0012] In one embodiment of the present invention, a guide hole is axially provided in the middle of the guide post, and the depth of the guide hole is greater than the length of the guide rod.

[0013] In one embodiment of this utility model, the sealing block is provided with several notches around its perimeter.

[0014] As described above, the bag mouth structure for filling a liquid sealing bag according to this utility model has the following beneficial effects:

[0015] 1. The bag nozzle is used for filling or pouring liquid products, and the one-way valve assembly is used to seal the bag nozzle to prevent backflow of the medium. The one-way valve assembly includes a sealing plug and a bushing. The sealing plug has a certain degree of hardness and resilience. Applying a certain pressure to the sealing plug causes it to shrink, forming a liquid channel between the sealing plug and the bushing, which facilitates the filling and pouring of liquid products. When the external force is removed, the sealing plug can rebound through its own elasticity and press against the bushing, forming a sealing surface between them to prevent backflow of the medium. This allows for rapid opening and closing of the bag nozzle.

[0016] 2. After the sealed bag is opened, it provides better internal sealing performance, preventing liquid products from oxidizing or deteriorating. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0018] Figure 2 This is an exploded view of the overall structure of Embodiment 1 of this utility model;

[0019] Figure 3 This is a cross-sectional view of the overall structure of Embodiment 1 of this utility model;

[0020] Figure 4 This is a bottom view of the mounting base structure of Embodiment 1 of this utility model;

[0021] Figure 5 This is an exploded view of the overall structure of Embodiment 2 of this utility model;

[0022] Figure 6 This is a cross-sectional view of the overall structure of Embodiment 2 of this utility model;

[0023] Figure 7 This is a bottom view of the mounting base structure of Embodiment 2 of this utility model.

[0024] Reference numerals: 1. Bag mouth; 2. One-way valve assembly; 21. Sealing plug; 22. Bushing; 211. Guide post; 212. Sealing block; 5. Connecting thread; 6. Mounting base; 7. Through hole; 9. Support frame; 10. Guide rod; 11. Guide hole; 12. Notch. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0026] Please see Figures 1 to 7 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0027] Example 1

[0028] Please see Figure 1 This utility model provides a bag mouth structure for filling a liquid sealing bag, including a bag mouth 1 and a one-way valve assembly 2 installed in the bag mouth 1;

[0029] The bag mouth 1 has a connecting thread 5 on its outer circumference and an installation cap is also installed on the bag mouth 1. The bag mouth 1 is threadedly connected to the installation cap through the connecting thread 5. The installation cap can protect and cover the bag mouth 1 to prevent it from being contaminated, and the installation cap can further strengthen the sealing performance of the bag mouth 1.

[0030] Please see Figure 2 and Figure 3 The one-way valve assembly 2 includes a sealing plug 21 and a bushing 22 disposed inside the bag mouth 1. In this embodiment, the bag mouth 1 and the bushing 22 can be made of plastic, and the sealing plug 21 can be made of an elastomer material, such as silicone or rubber. The sealing plug 21 has a certain hardness and resilience. The sealing plug 21 forms a sealing surface with the bushing 22 through its own elastic force to realize the one-way valve function. The sealing plug 21 includes a guide post 211 and a sealing block 212 integrally formed with the guide post 211. The sealing block 212 abuts against the bushing 22 to form a sealing surface.

[0031] Please see Figure 3 and Figure 4 The bottom of the bag mouth 1 is integrally formed with a mounting base 6. In this embodiment, the mounting base 6 is made of the same material as the bag mouth 1. The mounting base 6 is used to connect with the sealing bag. The mounting base 6 is provided with a through hole 7 that communicates with the bag mouth 1 to facilitate the flow of liquid products.

[0032] Please see Figure 3 and Figure 4The mounting base 6 has an integrally formed support frame 9, which is used to improve the strength and stability of the overall structure. The support frame 9 has an integrally formed guide rod 10 coaxially arranged with the bag mouth 1. The guide post 211 is sleeved on the guide rod 10 and can move axially along the guide rod 10. The guide post 211 has an axially arranged guide hole 11 in the middle. The depth of the guide hole 11 is greater than the length of the guide rod 10, so that the sealing plug 21 can move downward along the guide rod 10 when it is squeezed by external force, thereby forming a liquid channel between the sealing block 212 and the bushing 22, which facilitates liquid filling or pouring.

[0033] Please see Figure 3 The bushing 22 is fixed to the inner wall of the bag mouth 1 above the sealing plug 21. In this embodiment, the bushing 22 and the bag mouth 1 are fixed by a snap or ultrasonic welding process. When the external force is removed, the sealing plug 21 rebounds by its own elasticity and re-fits tightly with the bushing 22 to form a seal, preventing liquid backflow or outside air from entering.

[0034] Example 2

[0035] Please see Figure 5 , Figure 6 and Figure 7 When the sealing plug 21 is not under force, the sealing block 212 and the bushing 22 abut against each other to form a sealing surface, thereby realizing the one-way valve function. The sealing block 212 has several notches 12 around its perimeter. When a certain pressure is applied to the sealing plug 21, the guide post 211 can be contracted, forming a liquid channel between the sealing block 212 and the bushing 22. The several notches 12 around the sealing block 212 can increase the liquid channel, thereby facilitating the filling and pouring of liquid.

[0036] Brief description of the usage process (taking liquid product filling as an example): The liquid line rod on the external filling equipment applies a certain pressure to the sealing plug 21, causing the sealing plug 21 to move backward until the top of the guide hole 11 abuts against the top of the guide rod 10. At this time, the sealing block 212 separates from the bushing 22, forming a liquid channel. The liquid can pass smoothly through the liquid channel and fill the sealed bag until the filling is completed. After the liquid filling is completed, the liquid line rod withdraws from the bag mouth 1, and the sealing plug 21 rebounds under its own elasticity, re-fitting tightly with the bushing 22 to form a sealing surface and complete the sealing. In the actual production process, an installation cap will be screwed on the bag mouth 1 to cover the bag mouth 1.

[0037] In summary, the bag spout structure of this utility model maintains good internal sealing performance even after opening and use, preventing liquid leakage or oxidation without relying on an external cap. It is suitable for sealed packaging of liquid foods and beverages, and boasts advantages such as simple structure and high reliability. Therefore, this utility model effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A bag nozzle structure for filling a liquid-sealed bag, characterized in that: Includes a bag mouth (1) and a one-way valve assembly (2) installed inside the bag mouth (1); The one-way valve assembly (2) includes a sealing plug (21) and a bushing (22) disposed inside the bag mouth (1). The sealing plug (21) forms a sealing surface with the bushing (22) through its own elastic force.

2. The bag mouth structure for filling a liquid sealing bag according to claim 1, characterized in that: The bag mouth (1) is provided with a connecting thread (5) on its outer circumference.

3. The bag mouth structure for filling a liquid sealing bag according to claim 1, characterized in that: The bottom of the bag mouth (1) is integrally formed with a mounting base (6), and the mounting base (6) is provided with a through hole (7) communicating with the bag mouth (1).

4. The bag mouth structure for filling a liquid sealing bag according to claim 3, characterized in that: The mounting base (6) has an integrally formed support frame (9); the support frame (9) has an integrally formed guide rod (10) coaxially arranged with the bag mouth (1), and the sealing plug (21) is sleeved on the guide rod (10); The bushing (22) is fixed to the inner wall of the bag mouth (1) above the sealing rubber plug (21).

5. The bag mouth structure for filling a liquid sealing bag according to claim 4, characterized in that: The sealing plug (21) includes a guide post (211) and a sealing block (212) fixed on the guide post (211).

6. The bag mouth structure for filling a liquid sealing bag according to claim 5, characterized in that: The guide post (211) has a guide hole (11) axially arranged in the middle, and the depth of the guide hole (11) is greater than the length of the guide rod (10).

7. The bag mouth structure for filling a liquid sealing bag according to claim 5, characterized in that: The sealing block (212) has several notches (12) around its perimeter.

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