Exhaust cover structure of liquid storage soft bag

Abstract

The utility model provides an exhaust cover structure of a liquid storage soft bag, which comprises a connector and an end cover which are arranged on the liquid storage soft bag, the connector is internally provided with a through hole which is communicated with the inside and the outside of the liquid storage soft bag, the end cover is internally provided with a shaft rod, the end part of the shaft rod is provided with a one-way check valve, and the end part of the one-way check valve is provided with an exhaust port. When the end cover is matched with the connector, the shaft rod stretches into the through hole, the check valve is matched with the through hole in a sealing mode, and a sealing structure matched with the opening portion of the through hole is further arranged on the inner top face of the end cover. The exhaust cover structure can extrude and exhaust air in the bag in the application process of the liquid storage soft bag, oxidation and evaporation of liquid are reduced, and the storage effect of the liquid in the bag is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of inflatable liquid extraction, and particularly relates to an exhaust cap structure for a liquid storage soft bag. Background Art

[0002] In the field of liquid storage, liquid storage soft bags are widely used due to their light weight, flexibility and other characteristics. However, traditional liquid storage soft bags often face some problems during use. On the one hand, the air in the soft bag can cause the liquid to oxidize and evaporate, affecting the storage quality and shelf life of the liquid. On the other hand, the existing soft bag sealing structures usually have difficulty in achieving effective exhaust and sealing, and it is easy to occur liquid leakage or external air entry. In addition, during the exhaust operation, it is difficult to accurately control the flow rate and flow direction of the liquid, which is likely to cause liquid waste or inconvenient operation. Summary of the Utility Model

[0003] In order to solve the above problems existing in the prior art, the present application provides an exhaust cap structure for a liquid storage soft bag to solve the above technical defect problems.

[0004] According to the first aspect of the present utility model, an exhaust cap structure for a liquid storage soft bag is proposed, which includes a connector and an end cap arranged on the liquid storage soft bag. A through hole is arranged inside the connector to communicate the inside and outside of the liquid storage soft bag. A shaft rod is arranged inside the end cap, and a one-way check valve is arranged at the end of the shaft rod. When the end cap is matched with the connector, the shaft rod extends into the through hole and the check valve is in sealing cooperation with the through hole. A sealing structure is also arranged on the inner top surface of the end cap to cooperate with the mouth of the through hole. Through the design of the through hole inside the connector and the shaft rod and one-way check valve inside the end cap, the communication and sealing between the inside and outside of the liquid storage soft bag can be effectively controlled, which is convenient for the exhaust operation and improves the reliability of the soft bag storage.

[0005] In some specific embodiments, a shaft rod mounting post is arranged on the inner top surface of the end cap, and the shaft rod is detachably and cooperatively connected with the shaft rod mounting post. With this arrangement, the installation and replacement of the shaft rod are convenient, and the maintainability of the exhaust cap structure is improved.

[0006] In some specific embodiments, the end cap and the connector are cooperatively connected through internally and externally threaded portions respectively arranged. This arrangement has a firm connection and is convenient for operation, and the soft bag can be opened or sealed at any time as needed.

[0007] In some specific embodiments, the one-way check valve is a resilient conical surface structure integrally formed at the end of the shaft rod. This structure is simple and has good sealing performance, which can effectively prevent gas from flowing back into the inside of the soft bag, and at the same time can also play a role in positioning.

[0008] In some specific embodiments, an annular groove is formed on the circumferential surface near the end of the shaft rod, and a one-way check valve is arranged in the annular groove. The one-way check valve is a soft rubber check valve. With this arrangement, the sealing performance and maintainability of the check valve are enhanced.

[0009] In some specific embodiments, a flow blocking piece is further arranged on the shaft rod, and the flow blocking piece is located above the one-way check valve.

[0010] In some specific embodiments, the outer diameter of the flow blocking piece is equivalent to the inner diameter of the through hole, and there is a partial gap between the edge of the flow blocking piece and the through hole, or a flow blocking hole communicating both sides of the flow blocking piece is arranged in the middle of the flow blocking piece. With the above arrangement of the flow blocking piece, the gas-liquid flow rate can be further controlled, the shaft rod can be positioned to facilitate sealing, and the accuracy and stability of the exhaust operation can be improved.

[0011] In some specific embodiments, the connecting head is made of a transparent material.

[0012] In some specific embodiments, the outer wall of the shaft rod is arranged to have a color difference from the liquid inside the liquid storage soft bag. With this arrangement, the flow condition of the liquid at the shaft rod can be visually observed through the transparent connecting head, which is convenient for accurately judging the exhaust process.

[0013] In some specific embodiments, the sealing structure is a resilient protrusion provided on the inner top surface of the end cover, and the conical surface of the resilient protrusion seals with the mouth of the through hole when the end cover and the connecting head are fastened. With this arrangement, the sealing performance of the soft bag can be ensured and the storage effect can be improved.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The exhaust cover structure of the liquid storage soft bag in the present application, through the ingenious cooperation of the connecting head and the end cover, the one-way check valve at the end of the shaft rod, and the sealing structure on the inner top surface of the end cover, realizes efficient sealing and exhaust functions, can effectively prevent liquid leakage and air entry, reduce liquid oxidation and evaporation, and improve the preservation effect. The shaft rod is detachably connected to the shaft rod mounting post on the inner top surface of the end cover, which is convenient for maintenance and replacement; the end cover is threadedly connected to the connecting head, and the operation is simple and firm. Multiple one-way check valve designs are adapted to different working conditions. The flow blocking piece can accurately control the gas-liquid flow rate and can assist in positioning the shaft rod to facilitate the sealing between the shaft rod one-way valve and the through hole. The transparent connecting head and the shaft rod outer wall with color difference are convenient for visually observing the liquid flow condition, making the operation more accurate and controllable. In addition, this structure has strong adaptability and can meet the requirements of different liquids and storage environments. Description of the Drawings

[0016] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The drawings illustrate the embodiments and, together with the description, are used to explain the principles of the present utility model. Other embodiments and many of the expected advantages of the embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with each other. Like reference numerals refer to corresponding like parts.

[0017] Figure 1 is a schematic structural view of an exhaust cover structure of a liquid storage flexible bag according to a first embodiment of the present utility model;

[0018] Figure 2 is an exploded view of the exhaust cover structure according to a first specific embodiment of the present utility model;

[0019] Figure 3 is a schematic view of an exhaust cover structure of a liquid storage flexible bag according to a second embodiment of the present utility model;

[0020] Figure 4 is an exploded view of the exhaust cover structure according to a second specific embodiment of the present utility model.

[0021] The meanings of the numbers in the figures: 1 - end cap, 11 - sealing structure, 12 - shaft rod mounting post, 2 - shaft rod, 21 - one-way check valve, 22 - flow blocking piece, 3 - connector, 31 - through hole. Detailed Description of the Embodiments

[0022] In the following detailed description, reference is made to the accompanying drawings which form a part of the detailed description and in which are shown illustrative specific embodiments in which the present utility model may be practiced. In this regard, directional terms, such as "top", "bottom", "left", "right", "upper", "lower", etc., are used with reference to the orientation of the described figures. Since the components of the embodiments may be positioned in several different orientations, the directional terms are used for purposes of illustration and are in no way limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present utility model. Accordingly, the following detailed description should not be taken in a limiting sense, and the scope of the present utility model is defined by the appended claims.

[0023] The present utility model provides an exhaust cover structure for a liquid storage flexible bag, Figure 1 shows a schematic structural view of an exhaust cover structure of a liquid storage flexible bag according to a first embodiment of the present utility model, as Figure 1 shown, the exhaust cover structure of the liquid storage flexible bag includes an end cap 1, a shaft rod 2, a connector 3 and a liquid storage flexible bag 4, wherein, the connector 3 is welded to the liquid storage flexible bag 4, and a through hole 31 is provided inside the connector 3 (as Figure 2The explosion cross-sectional view) serves as the interface for connecting the inside and outside of the liquid storage flexible bag 4. The end cap 1 cooperates with the connector 3. Specifically, an external thread is provided on the outer surface of the connector 3, and an internal thread is provided on the inner surface of the end cap 1. The end cap 1 and the connector 3 are cooperatively connected by means of threaded connection. Combining Figure 2 The exploded view of the exhaust cap structure according to the first specific embodiment of the present invention shown in FIG. A sealing structure 11 is provided inside the end cap 1. The sealing structure 11 is a resilient protrusion provided on the inner top surface of the end cap 1. The conical surface of the resilient protrusion seals with the mouth of the through hole 31 when the end cap 1 and the connector 3 are fastened. An axle rod mounting post 11 is also provided on the inner surface of the end cap 1. An annular protrusion is provided on the cylindrical surface of the axle rod mounting post 11. The inside of the axle rod 2 is hollow and cooperates with the surface of the axle rod mounting post 11 and is fastened by means of the annular protrusion structure to prevent detachment.

[0024] In a specific embodiment, a one-way check valve 21 is provided at the lower end of the axle rod 2. The one-way check valve 21 is a soft rubber check valve and is installed at the surface groove of the axle rod 2 for cooperating with the inner wall of the through hole 3 of the connector 3. The function of the one-way check valve 21 is to prevent external air from entering the bag, and at the same time, the gas-liquid inside the bag can be discharged from the through hole 31 through the check valve by squeezing the bag body.

[0025] In a specific embodiment, a flow blocking piece 22 is also provided on the axle rod 2. The position of the flow blocking piece 22 is above the one-way check valve 21. The outer diameter of the flow blocking piece 22 is equal to or close to that of the through hole 31, and a partial gap is provided between the edge of the flow blocking piece 22 and the through hole 31 for the gas-liquid to flow out, so as to control the gas-liquid flow rate. At the same time, it can also be used as the positioning of the axle rod 2, which is beneficial to the fitting and sealing between the one-way valve at the top of the axle rod and the pipe wall. In other embodiments, flow blocking holes can also be provided on the surface of the flow blocking piece 22, and the flow blocking holes communicate with both sides of the flow blocking piece 22, which can also achieve the above technical effects.

[0026] Continue to refer to Figure 3 , Figure 3 The schematic diagram of the exhaust cap structure of the liquid storage flexible bag according to the second embodiment of the present invention is shown. As Figure 3 shown, the main structure in this embodiment is similar to Figure 1 , the difference is that the axle rod 2 is an integral axle rod, and a one-way check valve 21 is directly integrally formed on the axle rod 2, and no flow blocking piece structure is provided. Combining Figure 4 The exploded view of the exhaust cap structure according to the second specific embodiment of the present invention is shown. The one-way check valve 21 is a resilient conical surface structure integrally formed at the end of the axle rod 22. The axle rod 22 can be integrally formed by injection molding, and the injection molding material has a certain toughness, which can play a role in one-way sealing and at the same time can also play a role in positioning the axle rod.

[0027] In a specific embodiment, the connector 3 is made of a transparent material, and the outer wall of the shaft rod 2 is set to have a color difference from the liquid inside the liquid storage flexible bag 4. The flow of the liquid at the shaft rod 2 can be directly observed through the transparent connector 3, which is convenient for accurately judging the exhaust process.

[0028] The working principle of the exhaust cover structure of the liquid storage flexible bag in this application is as follows: Preliminarily tighten the end cap 1. At this time, there is a gap at the mouth of the through hole 31 of the end cap 1 and the connector 3 that is not sealed. Keep the through hole 31 vertically upward, and squeeze the liquid storage flexible bag 4 upward to exhaust. When exhausting, the gas will pass through the one-way check valve 21 in the lumen before the liquid. The resistances of the gas and liquid passing through the one-way check valve 21 are different, and the flow rate of the liquid is slower than that of the gas. Different feedback hand feelings will be generated when squeezing. Especially when Figure 1 there is a flow blocking piece 22 in the embodiment, the flow rate will be further slowed down to improve the control accuracy. The outer wall of the shaft rod 2 is set to have a color contrast relationship with the natural color of the liquid. The flow of the liquid can be directly observed through the transparent connector 3. After the liquid passes through the one-way check valve 21, the squeezing of the liquid storage flexible bag 4 can be stopped. At this time, there is no gas in the part of the bag from the bottom of the one-way check valve 21 except for the liquid. Tighten the end cap 1 to complete the exhaust inside the bag. When removing the cap, the one-way check valve 21 will discharge the accumulated liquid at the top of the lumen, preventing it from affecting the storage quality of the part inside the bag. Through the above operations, there is no air in the storage space inside the bag, reducing the oxidation and evaporation of the liquid and improving the preservation effect.

[0029] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalent forms, the present invention also aims to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. An exhaust cover structure for a liquid storage flexible bag, characterized in that It includes a connector and an end cap provided on the liquid storage flexible bag. A through hole is provided inside the connector to communicate the inside and outside of the liquid storage flexible bag. A shaft rod is provided inside the end cap, and a one-way check valve is provided at the end of the shaft rod. When the end cap is fitted with the connector, the shaft rod extends into the through hole and the check valve is sealingly fitted with the through hole. A sealing structure is further provided on the inner top surface of the end cap to cooperate with the mouth of the through hole.

2. The exhaust cover structure of a liquid storage flexible bag according to claim 1, characterized in that, A shaft rod mounting post is provided on the inner top surface of the end cap, and the shaft rod is detachably fitted and connected with the shaft rod mounting post.

3. The exhaust cover structure of a liquid storage soft bag according to claim 1, characterized in that, The end cap and the connector are connected by internally and externally threaded fittings provided respectively.

4. The exhaust cover structure of a liquid storage flexible bag according to claim 1, characterized in that, The one-way check valve is a resilient conical surface structure integrally formed at the end of the shaft rod.

5. The exhaust cover structure of a liquid storage soft bag according to claim 4, characterized in that, An annular groove is formed on the circumferential surface near the end of the shaft rod, and the one-way check valve is arranged in the annular groove. The one-way check valve is a soft rubber check valve.

6. The exhaust cover structure of a liquid storage flexible bag according to claim 5, characterized in that, A flow blocking piece is further provided on the shaft rod, and the flow blocking piece is located above the one-way check valve.

7. The exhaust cover structure of a liquid storage flexible bag according to claim 6, characterized in that The outer diameter of the flow blocking piece is equivalent to the inner diameter of the through hole, and a partial gap is provided between the edge of the flow blocking piece and the through hole, or a flow blocking hole communicating both sides of the flow blocking piece is provided in the middle of the flow blocking piece.

8. The exhaust cover structure of a liquid storage flexible bag according to claim 1, characterized in that, The connector is made of a transparent material.

9. The exhaust cover structure of a liquid storage flexible bag according to claim 8, characterized in that, The outer wall of the shaft rod is provided with a color difference from the liquid inside the liquid storage flexible bag.

10. The exhaust cap structure of a liquid storage soft bag according to claim 1, characterized in that, The sealing structure is a resilient protrusion provided on the inner top surface of the end cap, and the conical surface of the resilient protrusion seals with the mouth of the through hole when the end cap and the connector are tightened.

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