Valve for pressure packaging device

Abstract

The present invention relates to the technical field of valves, and more particularly to a valve for a pressure packaging device. The valve comprises: a sealing plug structure and a valve stem structure assembled in the sealing plug structure, wherein a first annular sealing structure on the valve stem structure abuts against and matches a second annular sealing structure in the sealing plug structure, and the first annular sealing structure is located between the second annular sealing structure and a feed inlet of the valve stem structure. The first annular sealing structure abuts against and limits the second annular sealing structure to prevent the second annular sealing structure of the sealing plug structure from sliding below the first annular sealing structure of the valve stem structure, thereby ensuring that the sealing plug structure is always at a proper position to ensure a sealing effect; and the first annular sealing structure is in close fit with the second annular sealing structure, such that a gap between the sealing plug structure and the valve stem structure is reduced, thereby improving the sealing performance.

Description

A valve for pressure packaging equipment Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a valve for a pressure packaging device. Background Technology

[0002] During house construction or renovation, gaps around doors and windows, expansion joints in components, and holes often require filling, sealing, and bonding, necessitating the use of expanding foam. Expanding foam is a moisture-curing polyurethane elastic sealing foam material. Typically, it is pressurized and filled into a metal container, then sealed by a valve. This valve must not only have reliable opening and closing performance but also ensure pressure resistance and sealing performance. However, the structural design of valves in existing pressure packaging devices makes their sealing parts relatively weak. Specifically, the contact point between the valve stem 500 and the inner wall of the sealing plug in existing technologies is a smooth straight tube structure, as shown in Figure 6. This prevents an effective seal from forming between the valve stem 500 and the inner wall of the sealing plug, potentially leading to air leakage and sealing failure during use. This compromises the product's shelf life and results in waste. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a valve for a pressure packaging device.

[0004] The technical solution adopted in this invention is:

[0005] A valve for a pressure packaging device includes: a sealing plug structure and a valve stem structure assembled within the sealing plug structure, wherein an annular sealing structure 1 on the valve stem structure abuts against an annular sealing structure 2 within the sealing plug structure, and the annular sealing structure 1 is located between the annular sealing structure 2 and the inlet of the valve stem structure.

[0006] Furthermore, the annular sealing structure one includes: an annular sealing rib disposed on the valve stem structure, and a top pressure slope is provided at the contact point between the annular sealing rib and the annular sealing structure two.

[0007] Furthermore, the second annular sealing structure includes: an annular contact rib disposed on the inner wall of the sealing plug structure, wherein the top pressing inclined surface of the annular sealing rib abuts against the lower surface of the annular contact rib.

[0008] Furthermore, the end of the sealing plug structure inserted into the pressure packaging device is provided with an annular sealing part for sealing and fitting on the lower surface of the sealing cup structure, and the end of the inner wall of the sealing plug structure near the annular sealing part is provided with a diameter-changing groove.

[0009] Furthermore, the diameter-changing groove gradually increases in size from the end furthest from the annular seal to the end closest to the annular seal, and multiple feed ports of the valve stem structure are located inside the diameter-changing groove.

[0010] Furthermore, the valve stem structure is provided with a stepped sealing part for abutting against the side of the annular sealing part away from the sealing cup structure, and an inner sealing structure is formed between the upper surface of the stepped sealing part and the lower surface of the annular sealing part.

[0011] Furthermore, the outer end of the upper surface of the stepped sealing part is provided with an annular transition surface, which is arranged opposite to the adhesive guiding slope of the lower surface of the annular sealing part.

[0012] Furthermore, it also includes: a sealing cup structure for sealing the opening of the pressure packaging device; a connecting valve stem structure is assembled inside the sealing cup structure, and a sealing plug structure is assembled between the valve stem structure and the sealing cup structure; the sealing cup structure includes: a sealing cup body, the center of the sealing cup body is provided with a central mounting hole for mating with the connecting sealing plug structure, and the outer side of the sealing cup body is provided with an annular mounting groove for wrapping the inner wall and outer wall of the opening of the pressure packaging device.

[0013] Furthermore, the annular assembly groove is a flared structure with an open bottom formed by folding the sealing cup body from the inside out, and a sealing gasket is installed between the annular assembly groove and the opening of the pressure packaging device.

[0014] As can be seen from the above solution, compared with the valves in the prior art, it has the following beneficial effects:

[0015] In a valve for a pressure packaging device according to the present invention, the annular sealing structure 2 is prevented from sliding down to below the annular sealing structure 1 of the valve stem structure by the contact and limiting of the annular sealing structure 1 and the annular sealing structure 2 of the annular sealing structure 2. This ensures that the sealing plug structure is always in the correct position and ensures the sealing effect. Furthermore, the tight fit between the annular sealing structure 1 and the annular sealing structure 2 makes the sealing plug structure and the valve stem structure fit more tightly, reducing the gap between the sealing plug structure and the valve stem structure, thereby improving the sealing performance.

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 is a schematic diagram of a valve for a pressure packaging device provided in an embodiment of the present invention;

[0019] Figure 2 is an assembly diagram of the valve and pressure packaging device provided in an embodiment of the present invention;

[0020] Figure 3 is an assembly diagram of the valve and pressure packaging device provided in an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of the valve stem structure provided in an embodiment of the present invention;

[0022] Figure 5 is a structural schematic diagram of the sealing plug structure provided in an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the valve stem in the prior art provided by the embodiments of the present invention;

[0024] Figure 7 is a schematic diagram of the assembly of the valve stem structure and sealing plug structure provided in an embodiment of the present invention;

[0025] Figure 8 is a magnified view of part A in Figure 7.

[0026] Icons: Sealing cup structure 100; Valve stem structure 200; Annular sealing structure one 201; Stepped sealing part 202; Annular transition surface 203; Feed inlet 204; Sealing plug structure 300; Annular sealing structure two 301; Annular sealing part 302; Variable diameter groove 303; Annular groove 304; Adhesive guiding slope 305; Pressure packaging device 400. Detailed Implementation

[0027] To ensure a clear and complete description of the technical solutions in the embodiments of the present invention, which will be presented below with reference to the accompanying drawings, it is important to understand that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0029] Please refer to Figures 1-8. The present invention provides a valve for a pressure packaging device, comprising: a sealing plug structure 300 and a valve stem structure 200 assembled within the sealing plug structure 300. An annular sealing structure 201 on the valve stem structure 200 abuts against an annular sealing structure 301 within the sealing plug structure 300, and the annular sealing structure 201 is located between the annular sealing structure 301 and the inlet 204 of the valve stem structure 200.

[0030] In a valve for a pressure packaging device according to the present invention, an annular sealing structure 201 is provided on the valve stem structure 200. The annular sealing structure 201 abuts against the lower part of the annular sealing structure 301 inside the sealing plug structure 300. By limiting the contact between the annular sealing structure 201 and the annular sealing structure 301, the annular sealing structure 301 of the sealing plug structure 300 is prevented from sliding down to the lower part of the annular sealing structure 201 of the valve stem structure 200, ensuring that the sealing plug structure 300 is always in the correct position and ensuring the sealing effect. Furthermore, the tight fit between the annular sealing structure 201 and the annular sealing structure 301 makes the sealing plug structure 300 and the valve stem structure 200 fit more tightly, reducing the gap between the sealing plug structure 300 and the valve stem structure 200, thereby improving the sealing performance.

[0031] A valve for a pressure packaging device according to the present invention further includes: a sealing cup structure 100 for sealing and connecting the opening of the pressure packaging device; a connecting valve stem structure 200 is assembled inside the sealing cup structure 100, and a sealing plug structure 300 is assembled between the valve stem structure 200 and the sealing cup structure 100; the sealing cup structure 100 includes: a sealing cup body, the center of which is provided with a central mounting hole for mating and connecting the sealing plug structure 300, and the outer side of the sealing cup body is provided with an annular assembly groove for wrapping and connecting the inner wall and outer wall of the opening of the pressure packaging device 400. The annular assembly groove is a flared structure with an open bottom formed by folding the sealing cup body from the inside to the outside, and a sealing gasket 600 is assembled between the annular assembly groove and the opening of the pressure packaging device 400. When the sealing cup body is connected to the opening of the pressure packaging device 400, the side wall of the sealing cup body is opened by the internal claw of the sealing machine, so that the outer end of the sealing cup body is folded from the inside to the outside to form a bottom open flared structure. Through the cooperation of this flared structure with the inner and outer walls of the opening of the pressure packaging device 400, the opened flared structure will generate a downward pulling force to press the sealing gasket 600 between the annular assembly groove and the opening of the pressure packaging device 400, so as to ensure the sealing performance.

[0032] In this invention, the annular sealing structure 201 includes an annular sealing rib disposed on the valve stem structure 200, and a top-pressing inclined surface is provided at the contact point between the annular sealing rib and the annular sealing structure 301. One technical solution for the annular sealing structure 301 is that it includes an annular locking rib disposed on the inner wall of the sealing plug structure 300, with the top-pressing inclined surface of the annular sealing rib abutting against the lower surface of the annular locking rib. Through the abutting against the lower surface of the annular locking rib, a tight fit is formed, ensuring that the sealing plug structure 300 will not move relative to the valve stem structure 200 due to external pressure or vibration. This allows the sealing plug structure 300 and the valve stem structure 200 to form surface or line contact, increasing the contact area and thus improving the sealing effect. In summary, the above technical solution design can reduce leakage problems caused by the movement or loosening of the sealing plug structure 300, improving the reliability and service life of the product.

[0033] The connection state of annular sealing structure 201 and annular sealing structure 301 is shown in the structure circled at point A in Figure 7. In order to make the connection form easier to visualize, annular sealing structure 201 and annular sealing structure 301 are both in a free state. When the installation control annular sealing structure 201 and annular sealing structure 301 come into contact with each other, annular sealing structure 201 and annular sealing structure 301 will produce an interference fit and press against each other, thereby ensuring the sealing effect.

[0034] In this invention, another technical solution for the second annular sealing structure 301 is as follows: the second annular sealing structure 301 includes an annular contact groove disposed on the inner wall of the sealing plug structure 300, and the top pressure inclined surface of the annular sealing rib abuts against the inclined groove surface of the annular contact groove. The design of the annular contact groove and the top pressure inclined surface enables a tight contact between the sealing plug structure 300 and the annular sealing rib, increasing the contact area and sealing pressure, thereby improving the sealing performance. The design of the top pressure inclined surface can automatically adjust its position during the sealing process, ensuring a tight fit between the annular sealing rib and the annular contact groove, adapting to different working conditions and pressure changes, and enhancing the reliability of the seal. The design of the annular contact groove simplifies the installation process of the sealing structure, making it easier to align and install the sealing plug structure 300 and the annular sealing rib, improving assembly efficiency. The tight contact and stable sealing performance reduce wear on the sealing parts and extend the service life of the sealing structure. Furthermore, the top pressure inclined surface, through the contact of the inclined groove surface, uniformly transmits external pressure to the inner wall of the sealing plug structure 300, increasing the sealing pressure and improving the sealing effect.

[0035] The sealing plug structure 300, inserted into the pressure packaging device 400, has an annular sealing portion 302 at one end for sealing against the lower surface of the sealing cup structure 100. A variable diameter groove 303 is provided on the inner wall of the sealing plug structure 300 near the annular sealing portion 302. The annular sealing portion 302 seals against the lower surface of the sealing cup structure 100, increasing the contact area and uniformly transmitting external pressure to the lower surface of the sealing cup structure 100, forming an annular sealing contact surface. This increases the contact area and sealing pressure, thereby improving the overall sealing performance, reducing gaps, and preventing liquid or gas leakage. The variable diameter groove 303 on the inner wall of the sealing plug structure 300 near the annular sealing portion 302 gradually increases in size from the end furthest from the annular sealing portion 302 to the end closest to it. Multiple feed ports 204 of the valve stem structure 200 are located inside the variable diameter groove 303. When the liquid needs to be expelled from the pressure packaging device 400, the valve stem structure 200 is pressed down. The valve stem structure 200 compresses the sealing plug structure 300, causing the top of the sealing plug structure 300 to deform. After the multiple inlets 204 of the valve stem structure 200 enter the inner cavity of the pressure packaging device 400, the liquid in the pressure packaging device 400 can more easily enter the multiple inlets and enter the medium channel of the valve stem structure 200 through the multiple inlets. In particular, when the size of the multiple inlets entering the pressure packaging device 400 is controlled to be small, a conical guide groove is formed between the multiple inlets 204 of the valve stem structure 200 and the variable diameter groove 303, which is conducive to the entry of the liquid.

[0036] The valve stem structure 200 is provided with a stepped sealing part 202 for abutting against the side of the annular sealing part 302 away from the sealing cup structure 100, and an inner sealing structure is formed between the upper surface of the stepped sealing part 202 and the lower surface of the annular sealing part 302. The multi-layered contact between the stepped seal 202 and the annular seal 302 forms a mechanical lock, ensuring a stable fit between the valve stem structure 200 and the sealing plug structure 300. This results in multi-layered sealing contact between the valve stem structure 200 and the annular seal 302, increasing the contact area and sealing pressure, and significantly improving sealing performance. The upper surface of the stepped seal 202 and the lower surface of the annular seal 302 are tightly fitted to form an inner sealing structure. The multi-layered design of the stepped seal 202 evenly transmits external pressure to the lower surface of the annular seal 302, increasing sealing pressure, reducing gaps and leakage paths, and ensuring sealing effect. Achieving multi-layered sealing through a single stepped seal reduces structural complexity and assembly difficulty. The structure of the stepped seal 202 can adapt to annular seals 302 of different sizes within a certain range, increasing product versatility.

[0037] The outer end of the upper surface of the stepped sealing part 202 is provided with an annular transition surface 203. The annular transition surface 203 and the adhesive guiding slope 305 on the lower surface of the annular sealing part 302 are respectively matched to form an adhesive outlet for dispensing adhesive.

[0038] The annular transition surface 203 is a rounded or chamfered surface, designed to cooperate with the adhesive guiding slope 305 on the lower surface of the annular sealing part 302 to form an outlet that facilitates the flow of liquid material inside the pressure packaging device 400 to the multiple inlets 204 of the valve stem structure 200. The size of the outlet formed by the annular transition surface 203 and the adhesive guiding slope 305 gradually decreases from the outside to the inside, causing the flow velocity of the liquid material to gradually increase as it flows towards the inlet 204. When controlling the separation of the stepped sealing part 202 and the annular sealing part 302 to press out the liquid material, the flow resistance during the pressing out of the liquid material is reduced, allowing the liquid material to pass more smoothly through the gap between the stepped sealing part 202 and the annular sealing part 302. The liquid material flows more smoothly, improving the efficiency of pressing out the liquid material, and making the adhesive application effect better when the valve is actuated.

[0039] The lower surface of the annular sealing part 302 is also provided with an annular groove 304 to facilitate the assembly of automated equipment. During the press-fitting of the valve stem structure 200 and the sealing plug structure 300, the valve stem structure 200 needs to be press-fitted into the sealing plug structure 300. However, the fit between the two is an interference fit, and the bottom plane of the sealing plug structure 300 is relatively thin. This makes press-fitting during assembly very difficult. Directly using a sleeve for press-fitting, since there are no stress points on the edge of the sealing plug structure 300, makes it very easy for the sealing plug structure 300 to detach during press-fitting. The problem is that it is impossible to accurately and efficiently press-fit the valve stem structure 200 and the sealing plug structure 300. In this invention, an annular groove 304 is provided on the lower surface of the annular sealing part 302. When the sleeve is pressed, the connection between the sleeve and the annular sealing part 302 has a force point. The sleeve is pressed into the annular groove 304 on the lower surface of the annular sealing part 302, so that the two are not easy to fall off and separate during pressing. This ensures the pressing effect of the valve stem structure 200 and the sealing plug structure 300, and can solve the problem of difficulty in assembling the valve stem structure 200 and the sealing plug structure 300 in the prior art.

[0040] In addition, the annular groove 304 on the lower surface of the annular sealing part 302 is connected to the adhesive guiding slope 305, which makes it easier for the pressing equipment (such as the sleeve) to align into the annular groove 304 during pressing and reduces the wear on the edge of the annular groove 304 during docking.

[0041] The valve stem structure 200 can be a gun-type valve stem or a tubular valve stem, making it suitable for different application scenarios. Figure 2 is an assembly diagram of a valve with a tubular valve stem and a pressure packaging device; Figure 3 is an assembly diagram of a valve with a gun-type valve stem and a pressure packaging device.

[0042] In a valve for a pressure packaging device according to the present invention, the valve stem structure 200 is formed by mixing a valve stem base material and a glass fiber material. The valve stem base material is a basic powder material in the prior art, which will not be described in detail here, such as Ni-Mn-Mo low alloy steel powder. By adding glass fiber material to the valve stem base material for mixing, the strength of the processed valve stem structure 200 is enhanced, which can significantly improve the mechanical strength and rigidity of the valve stem, enabling it to withstand higher stress and load. Furthermore, since the valve stem structure 200 contains glass fiber material, it has good high temperature resistance and a low coefficient of thermal expansion, which can maintain stable mechanical properties in high temperature environments, improve fatigue resistance, reduce fatigue damage caused by long-term use or repeated stress, and reduce material expansion and deformation caused by temperature changes. This allows the valve stem structure 200 to maintain a tight closed state during operation, preventing valve closure. By improving the mechanical strength, thermal stability, and fatigue resistance of the valve stem structure 200, maintenance and replacement costs are reduced.

[0043] In a valve for a pressure packaging device according to the present invention, the original sealing plug structure is modified to reduce the amount of material used in the new sealing plug and reduce the air permeability area of ​​the sealing part of the sealing plug, thereby reducing the amount of gas permeation and thus reducing the leakage of the valve.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A valve for a pressure packaging device, characterized in that, include: The sealing plug structure (300) and the valve stem structure (200) assembled in the sealing plug structure (300) are provided. The annular sealing structure one (201) on the valve stem structure (200) abuts against the annular sealing structure two (301) in the sealing plug structure (300), and the annular sealing structure one (201) is located between the annular sealing structure two (301) and the feed port (204) of the valve stem structure (200).

2. A valve for a pressure packaging device according to claim 1, characterized in that, The annular sealing structure one (201) includes: an annular sealing rib provided on the valve stem structure (200), and a top pressure slope is provided at the contact point between the annular sealing rib and the annular sealing structure two (301).

3. A valve for a pressure packaging device according to claim 2, characterized in that, The second annular sealing structure (301) includes: an annular contact rib disposed on the inner wall of the sealing plug structure (300), and the top pressing slope of the annular sealing rib abuts against the lower surface of the annular contact rib.

4. A valve for a pressure packaging device according to claim 1, characterized in that, The sealing plug structure (300) is inserted into the pressure packaging device (400) at one end and has an annular sealing part (302) for sealing and fitting on the lower surface of the sealing cup structure (100). The inner wall of the sealing plug structure (300) near the annular sealing part (302) has a variable diameter groove (303).

5. A valve for a pressure packaging device according to claim 4, characterized in that, The variable diameter groove (303) gradually increases in size from the end away from the annular seal (302) to the end closer to the annular seal (302), and the multiple feed ports (204) of the valve stem structure (200) are located inside the variable diameter groove (303).

6. A valve for a pressure packaging device according to claim 5, characterized in that, The valve stem structure (200) is provided with a stepped sealing part (202) for abutting against the side of the annular sealing part (302) away from the sealing cup structure (100), and an inner sealing structure is formed between the upper surface of the stepped sealing part (202) and the lower surface of the annular sealing part (302).

7. A valve for a pressure packaging device according to claim 6, characterized in that, The outer end of the upper surface of the stepped sealing part (202) is provided with an annular transition surface (203). The annular transition surface (203) and the adhesive guiding slope (305) on the lower surface of the annular sealing part (302) are respectively matched to form an adhesive outlet for dispensing adhesive.

8. A valve for a pressure packaging device according to claim 1, characterized in that, Also includes: A sealing cup structure (100) is used to seal the opening of the pressure packaging device (400); a connecting valve stem structure (200) is assembled inside the sealing cup structure (100), and a sealing plug structure (300) is assembled between the valve stem structure (200) and the sealing cup structure (100).

9. A valve for a pressure packaging device according to claim 8, characterized in that, The sealing cup structure (100) includes: a sealing cup body, the center of which is provided with a central mounting hole for mating with the connecting sealing plug structure (300), and the outer side of the sealing cup body is provided with an annular assembly groove for wrapping the inner and outer walls of the opening of the connecting pressure packaging device (400).

10. A valve for a pressure packaging device according to claim 9, characterized in that, The annular assembly groove is an open-bottom flared structure formed by folding the sealing cup body from the inside out. A sealing gasket is installed between the annular assembly groove and the opening of the pressure packaging device (400).

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