A gas valve

Abstract

The application discloses a gas valve, which comprises a valve seat, a valve core assembly and a moisture absorbing element. The valve seat is provided with an exhaust passage which is connected with the inside and outside of a container. The exhaust passage is provided with an air inlet which is connected with the inside of the container and an air outlet which is connected with the outside of the container. The valve core assembly is used for opening and closing the air inlet, and a normally closed valve structure is formed between the valve core assembly and the air inlet. The moisture absorbing element is detachably connected to the valve seat and is used for opening and closing the air outlet. The moisture absorbing element is provided with a moisture absorbing cavity which is connected with the air inlet. When the moisture absorbing element closes the air outlet, it simultaneously acts on the valve core assembly so that the valve core assembly opens the air inlet. The application has the advantages of simple structure, convenient use and integration of air extraction and moisture removal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of closure, in particular to a gas valve. BACKGROUND

[0002] A vacuum container (such as a vacuum compression bag) is usually provided with a gas valve, which can prevent gas from entering the container after vacuumizing. However, there is a problem that the objects placed in the container may have some moisture, and the objects with moisture may produce odor or even mildew when stored in the vacuum container for a long time. Some existing vacuum containers are provided with a desiccant bag, but there is a problem that a desiccant bag needs to be provided in each container, which is too high in cost. On the other hand, when the desiccant bag is reused, the container must be opened to take out the desiccant bag for desiccation or oxidation so as to continue to use next time, but this process will destroy the compression state of the vacuum container.

[0003] The present application is made based on this situation. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art, and provides a gas valve which is simple in structure, convenient to use, and integrates air extraction and dehumidification.

[0005] The present application is achieved by the following technical solutions:

[0006] To solve the above technical problems, the present application provides a gas valve, which comprises a valve seat, a valve core assembly, and a moisture absorbing piece. The valve seat is provided with an exhaust passage which communicates between the inside and outside of a container. The exhaust passage is provided with an air inlet which communicates with the inside of the container, and an air outlet which communicates with the outside of the container. The valve core assembly is used to open and close the air inlet, and a normally closed valve structure is formed between the valve core assembly and the air inlet. The moisture absorbing piece is detachably connected to the valve seat and is used to open and close the air outlet. The moisture absorbing piece is provided with a moisture absorbing cavity which communicates with the air inlet. When the moisture absorbing piece closes the air outlet, it simultaneously acts on the valve core assembly to open the air inlet.

[0007] To further solve the technical problems to be solved by the present application, in the gas valve provided by the present application, an elastic piece is arranged between the valve core assembly and the valve seat, which drives the valve core assembly to move upward to close the air inlet. The lower part of the moisture absorbing piece abuts against the valve core assembly, and when the moisture absorbing piece moves downward to close the air outlet, it simultaneously drives the valve core assembly to move downward to compress the elastic piece to open the air inlet.

[0008] To further solve the technical problems to be solved by the present application, in the gas valve provided by the present application, the valve core assembly comprises a main core body. A first sealing structure is arranged between the main core body and the air inlet. A second sealing structure is arranged between the moisture absorbing piece and the air outlet.

[0009] In order to further solve the technical problems to be solved by the present application, the gas valve provided by the present application is characterized in that the middle part of the main core is provided with a one-way valve structure capable of communicating the inner and outer sides of the air inlet and only allowing one-way air outlet.

[0010] In order to further solve the technical problems to be solved by the present application, the gas valve provided by the present application is characterized in that the one-way valve structure comprises an air hole, and the air hole is provided with a valve plate or a plunger.

[0011] In order to further solve the technical problems to be solved by the present application, the gas valve provided by the present application is characterized in that the first sealing structure comprises a first boss provided at the air inlet and a second boss provided at the lower part of the main core and capable of being pressed together with the first boss, and a first sealing gasket is arranged between the first boss and the second boss.

[0012] In order to further solve the technical problems to be solved by the present application, the gas valve provided by the present application is characterized in that the second sealing structure comprises a third boss provided at the air outlet and a fourth boss provided on the moisture absorbing member and capable of being pressed together with the third boss, and a second sealing gasket is arranged between the third boss and the fourth boss.

[0013] In order to further solve the technical problems to be solved by the present application, the gas valve provided by the present application is characterized in that the upper end of the valve seat is movably connected with a top cover abutting against the moisture absorbing member and capable of pressing the moisture absorbing member downward, and the top cover is slidably connected with the valve seat in the up-down direction or is screwed with the valve seat.

[0014] In order to further solve the technical problems to be solved by the present application, the gas valve provided by the present application is characterized in that the second sealing structure comprises a first sealing thread arranged on the valve seat and surrounding the upper end of the exhaust passage, and a second sealing thread arranged on the moisture absorbing member and capable of cooperating with the first sealing thread.

[0015] In order to further solve the technical problems to be solved by the present application, the gas valve provided by the present application is characterized in that the gas valve further comprises a detachable protective cover arranged on the valve seat after the moisture absorbing member is detached.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. The gas valve of the present application is internally provided with a detachable moisture absorbing member, which integrates the functions of sealing and dehumidifying. After the container is sealed, the moisture inside the gas valve can be removed, the humidity inside the container is reduced, the container is kept dry, the growth of microorganisms is inhibited, and the substances stored in the container can be maintained in the previous state as much as possible, thereby prolonging the shelf life.

[0018] 2. In the present application, the valve core assembly and the air inlet form a normally closed valve structure, and the elastic member upwardly presses the valve core assembly, so that the valve core assembly closes the air inlet and keeps the normally closed state. During the disassembly and assembly of the moisture absorbing member, since there is no external force to press the valve core assembly, the valve core assembly will be upwardly pressed by the elastic member, so that the valve core assembly closes the air inlet, which further illustrates that during the disassembly and assembly of the moisture absorbing member, there is no air leakage, that is, the disassembly and assembly of the moisture absorbing member will not damage the closed state of the container.

[0019] 3. In one scheme of the present application, a one-way valve is arranged on the main core, and when air is extracted, the air extraction device can be directly connected to extract air, without the need to press the valve core assembly, so that air extraction is simple and convenient, air leakage is not easy to occur, and the closed state of the container will not be damaged during air extraction. BRIEF DESCRIPTION OF DRAWINGS

[0020] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which:

[0021] Figure 1 is a schematic diagram of the air extraction state of the first embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the dehumidification state of the first embodiment of the present application;

[0023] Figure 3 is a schematic diagram of the dehumidification state of the second embodiment of the present application;

[0024] Figure 4 is an exploded view of the valve seat, elastic member and valve core assembly of the second embodiment of the present application;

[0025] Figure 5 is a schematic diagram of the air extraction state of the second embodiment of the present application;

[0026] Figure 6 is a schematic diagram of the disassembly of the moisture absorbing member and the assembly of the protective cover of the second embodiment of the present application. DETAILED DESCRIPTION

[0027] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment I:

[0029] As Figures 1-2The embodiment one of the application is a gas valve, which comprises a valve seat 1, a valve core assembly 2, and a moisture absorbing member 4. The valve seat 1 is provided with an exhaust passage 11, which is connected with the inside and outside of a container. The exhaust passage 11 is provided with an air inlet 111, which is connected with the inside of the container, and an air outlet 112, which is connected with the outside of the container. The valve core assembly 2 is used to open and close the air inlet 111, and the valve core assembly 2 and the air inlet 111 form a normally closed valve structure. In the normally closed valve structure, the valve core assembly 2 is closed automatically without human operation. The closing force can be the elastic force provided by a spring, the gravity of the valve core assembly 2 itself, or even electromagnetic force, etc. There are many normally closed valves in the prior art, which will not be listed one by one. The moisture absorbing member 4 is detachably connected to the valve seat 1 and is used to open and close the air outlet 112. The moisture absorbing member 4 is provided with a moisture absorbing cavity 41, which is connected with the air inlet 111. The moisture absorbing cavity 41 is provided with a drying agent 42 or other moisture absorbing substances, which are used to absorb water vapor. When the moisture absorbing member 4 closes the air outlet 112, it simultaneously acts on the valve core assembly 2 to make the valve core assembly 2 open the air inlet 111.

[0030] Since the moisture absorbing member 4 is detachably connected to the valve seat 1, the detachable moisture absorbing member 4 can be used for multiple containers that need to be dehumidified, such as vacuum boxes, vacuum bags, ordinary bottles, etc., thereby improving the application range of the moisture absorbing member 4. At the same time, due to the existence of the normally closed valve structure in the present application, after the moisture absorbing member 4 is removed, the gas valve will not be completely opened, and the container installed with the gas valve can still maintain a sealed state. Therefore, when it is felt that the moisture absorbing member 4 absorbs too much moisture, the moisture absorbing member 4 can also be removed and dried for reuse.

[0031] The detachable connection between the moisture absorbing member 4 and the valve seat 1 can adopt, for example, a mode in which the moisture absorbing member 4 is directly inserted into the exhaust passage 11 (as shown in Figure 1 , Figure 2 ), or a mode in which the moisture absorbing member 4 is threadedly connected to the valve seat 1 (as shown in Figure 3 ). Of course, it can be conceived that there are other detachable connection modes, such as clamping.

[0032] Since the valve core assembly 2 and the air inlet 111 form a normally closed valve structure, when the moisture absorbing member 4 is disassembled, the air inlet 111 is normally closed and will not leak.

[0033] The valve core assembly 2 and the valve seat 1 are provided with an elastic member 3, which drives the valve core assembly 2 to move upward to close the air inlet 111. The lower part of the moisture absorbing member 4 abuts against the valve core assembly 2, and when the moisture absorbing member 4 moves downward to close the air outlet 112, it simultaneously drives the valve core assembly 2 to move downward to compress the elastic member 3 to open the air inlet 111. The elastic member 3 is preferably a spring.

[0034] The gas valve of the present application integrates the functions of sealing and dehumidifying. After sealing the container, the gas valve can also remove the moisture inside the gas valve, reduce the humidity in the container, keep the container dry, inhibit the growth of microorganisms, and maintain the previous state of the substances stored in the container as much as possible, thereby prolonging the shelf life.

[0035] More specifically, when switched to the dehumidifying state, the moisture absorbing member 4 is first adjusted to move downward. When the moisture absorbing member 4 moves downward, it also acts on the valve core assembly 2, i.e., presses downward on the valve core assembly 2, so that the two move downward together until the moisture absorbing member 4 blocks the gas outlet 112, and at the same time the valve core assembly 2 opens the gas inlet 111. In this way, the moisture in the vacuum container can enter the moisture absorbing cavity 41 through the gas inlet 111, so that the desiccant 42 in the moisture absorbing cavity 41 absorbs the moisture.

[0036] As shown in Figure 1 , the elastic member 3 presses upward on the valve core assembly 2, so that the valve core assembly 2 closes the gas inlet 111 and remains in the normally closed state. During the disassembly and assembly of the moisture absorbing member 4, since there is no external force pressing on the valve core assembly 2, the valve core assembly 2 will be pressed upward by the elastic member 3, causing the valve core assembly 2 to close the gas inlet 111. This further illustrates that during the disassembly and assembly of the moisture absorbing member 4, there will be no leakage, i.e., the disassembly and assembly of the moisture absorbing member 4 will not damage the sealing state of the container.

[0037] In the dehumidifying state, although the moisture absorbing member 4 will press downward on the valve core assembly 2 to open the gas inlet 111, the moisture absorbing member 4 will simultaneously close the gas outlet 112. The moisture absorbing cavity 41 is in communication with the gas inlet 111, and the gas in the vacuum container can only enter the moisture absorbing cavity 41 and cannot escape to the outside of the container. Therefore, there will still be no leakage, i.e., the dehumidifying process will not damage the sealing state of the container.

[0038] It is worth noting that during the dehumidifying process of the present application, the moisture absorbing member 4 and the valve core assembly 2 have a linkage relationship, i.e., the moisture absorbing member 4 can be adjusted up and down, and the lower end of the moisture absorbing member 4 presses on the valve core assembly 2 and can drive it to move downward. When the moisture absorbing member 4 presses on the valve core assembly 2, the structure on the moisture absorbing member 4 for sealing the gas outlet 112 (the fourth boss 43 described below) and the structure on the valve core assembly 2 for sealing the gas inlet 111 (the second boss 211 described below) satisfy the linkage relationship during movement, i.e., one is opened and the other is closed. When the moisture absorbing member 4 presses downward on the valve core assembly 2 to open the gas inlet 111, the moisture absorbing member 4 must be able to close the gas outlet 112 at the same time to reduce leakage.

[0039] As a more specific embodiment, the valve core assembly 2 includes a main core 21, with a first sealing structure between the main core 21 and the air inlet 111, and a second sealing structure between the moisture-absorbing element 4 and the air outlet 112. Due to the relationship between the moisture-absorbing element 4 and the valve core assembly 2, when the second sealing structure is in a sealed state, the first sealing structure must be in a ventilated state. This is to allow the moisture in the inner space of the valve to smoothly enter the moisture-absorbing chamber 41 of the moisture-absorbing element 4.

[0040] As a more specific embodiment, the main core 21 is provided with a one-way valve structure in the middle that can connect the inner and outer sides of the air inlet 111 and can only release air in one direction.

[0041] As a preferred embodiment, the one-way valve structure includes an air hole 212, at which a valve plate 213 or a plunger is provided. Figures 1-2 As shown, the valve plate 213 is elastic, and the valve plate 213 and the air hole 212 together form a one-way valve structure that allows air to escape in only one direction. Thus, during evacuation, an evacuation device can be connected to directly evacuate air without needing to push down the first sealing structure (i.e., the first boss 12 and the second boss 211). Under negative pressure, the edge of the valve plate 213 automatically tilts upward, thereby opening the upper and lower spaces of the main core 21 and ensuring the unobstructed exhaust channel 11, thus facilitating evacuation. When this solution is used for vacuum bags, after the vacuum bag is evacuated, a negative pressure is formed at the air inlet 111. Under the action of external atmospheric pressure, the valve plate 213 tightly adheres to the sealing valve core assembly 2, continuously sealing the vacuum bag. This configuration allows for evacuation without removing the moisture-absorbing component 4, making evacuation convenient for the user.

[0042] The present invention provides a one-way valve on the main core 21. When evacuating, the air can be directly evacuated by connecting the air evacuation device without having to press the valve core assembly 2. The air evacuation is simple and convenient, and it is not easy to leak air. The air evacuation will not damage the sealed state of the container.

[0043] As a more specific embodiment, the first sealing structure includes a first boss 12 located at the air inlet 111 and a second boss 211 located at the lower part of the main core 21 and capable of pressing against the first boss 12. A first sealing gasket 13 is provided between the first boss 12 and the second boss 211. Figure 1 As shown, under the action of the elastic element 3, the main core 21 moves upward until its second protrusion 211 presses against the first protrusion 12, and the two press together to form a seal, thereby blocking the air inlet 111. A first sealing gasket 13 is provided between the first protrusion 12 and the second protrusion 211 to enhance the sealing effect and reduce air leakage.

[0044] As a more specific solution of this embodiment, the second sealing structure comprises a third boss 14 arranged at the air outlet 112, and a fourth boss 43 arranged on the moisture absorbing element 4 and capable of being pressed together with the third boss 14, and a second sealing gasket 15 is arranged between the third boss 14 and the fourth boss 43. Figure 2 As shown in the figure, the moisture absorbing element 4 moves downward, and drives the valve core assembly 2 to move downward, until the fourth boss 43 on the moisture absorbing element 4 is pressed onto the third boss 14, and the two are pressed together to form a seal, so as to block the air outlet 112, so that the gas in the air valve inner space can enter the moisture absorbing cavity 41 of the moisture absorbing element 4, and cannot leak to the outside. The second sealing gasket 15 is arranged between the third boss 14 and the fourth boss 43, so as to strengthen the sealing effect and reduce gas leakage.

[0045] In order to simplify the structure, the first boss 12 and the third boss 14 are preferably the same boss, which protrudes from the side wall of the exhaust passage 11 to the central position, and the first sealing gasket 13 is fixed to the bottom surface thereof, and the second sealing gasket 15 is fixed to the top surface thereof.

[0046] As a more specific solution of this embodiment, the valve seat 1 is movably connected with a top cover 6 at the upper end, which abuts against the moisture absorbing element 4 and can press the moisture absorbing element 4 downward. The top cover 6 is slidably connected with the valve seat 1 in the up-down direction or is screwed on the valve seat 1. The top cover 6 has the functions of protecting the internal structure of the air valve and adjusting the height of the moisture absorbing element 4. Figure 2 As shown in the figure, during the adjustment of the air valve into the dehumidification state, the top cover 6 can be manually adjusted to move downward, and the lower end of the top cover 6 will press the moisture absorbing element 4 downward, and will press the valve core assembly 2 and the elastic element 3 downward.

[0047] Of course, the top cover 6 is provided with a through hole for air, so as not to hinder the air suction.

[0048] In addition, the top cover 6 and the moisture absorbing element 4 can be separate, or can be fixedly connected or integrally connected.

[0049] Of course, the top cover 6 is preferably screwed on the valve seat 1, so that the top cover 6 can be stopped at any position between the upper and lower limit positions, that is, the air suction speed during air suction can be controlled, and the top cover 6, the moisture absorbing element 4 and the valve core assembly 2 can have a certain size error.

[0050] If the top cover 6 is slidably connected with the valve seat 1, a structure for limiting the disengagement of the top cover 6 is preferably arranged between the top cover 6 and the valve seat 1, as shown in the figure. Figure 1 、 Figure 2 As shown in the figure, an annular boss is arranged at the upper end of the valve seat 1, the top cover 6 is sleeved on the annular boss, and a limiting protrusion 61 is arranged at the lower end of the top cover 6 and the upper end of the annular boss.

[0051] In this embodiment, the top cover 6 does not need to be removed during either the air extraction or dehumidification process, making it more convenient to use.

[0052] Example 2:

[0053] like Figures 3-6 The illustration shown is a second embodiment of the present invention, which differs from the first embodiment described above in that:

[0054] In this embodiment, such as Figure 5 As shown, when evacuating or venting air, the moisture-absorbing component 4 needs to be removed first, and then the vacuum pumping device or tool is connected to the valve seat 1 for evacuation. During the evacuation process, after the vacuum pumping device is installed, it will first push down on the valve core assembly 2 (such as...). Figure 5 The force F shown is the force generated by the downward pressure of the valve core assembly 2 by the vacuum pumping equipment. This will cause the valve core assembly 2 to open the exhaust channel 11. With the exhaust channel 11 unobstructed, the gas inside the valve (the gas inside the container) can be drawn away by the vacuum pumping equipment.

[0055] Of course, in this embodiment, a one-way valve structure (valve plate 213 and air hole 212) as described in Embodiment 1 can also be provided on the valve core assembly 2, so that when pumping air, there is no need for the vacuum pumping equipment to press the valve core assembly 2 downward.

[0056] As a more specific embodiment, such as Figure 3 As shown, the second sealing structure includes a first sealing thread 16 disposed on the valve seat 1 and surrounding the upper end of the exhaust channel 11, and a second sealing thread 44 disposed on the moisture-absorbing member 4 and capable of engaging with the first sealing thread 16. When the moisture-absorbing member 4 is screwed down, the air outlet 112 is sealed, and the moisture-absorbing member 4 just pushes open the valve core assembly 2, allowing the air inlet 111 to flow freely, thereby connecting the inner space of the air valve and the moisture-absorbing chamber 41 of the moisture-absorbing member 4, thus performing dehumidification.

[0057] As a more specific embodiment, such as Figure 6 As shown, the air valve also includes a removable protective cover 5 that is installed on the valve seat 1 after the moisture-absorbing component 4 is disassembled. When neither air is being drawn in nor dehumidified, the moisture-absorbing component 4 is removed, but at this time the valve core assembly 2 inside the valve seat 1 will be exposed, making it easy for dust to enter. Therefore, after the moisture-absorbing component 4 is disassembled, the protective cover 5 is installed on the valve seat 1, which can effectively protect the internal structure of the air valve and prevent contamination such as dust and water from entering.

[0058] Of course, to further simplify the structure, the protective cover 5 is preferably detachably mounted on the first sealing thread 16.

[0059] Obviously, the above embodiments of the present application are merely example for clearly explaining the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A gas valve characterized by: The valve seat (1) is provided with an exhaust passage (11) communicating inside and outside of the container, the exhaust passage (11) is provided with an air inlet (111) communicating inside of the container and an air outlet (112) communicating outside of the container, the valve core assembly (2) is used for opening and closing the air inlet (111), and the valve core assembly (2) and the air inlet (111) constitute a normally closed valve structure, the moisture absorbing element (4) is detachably connected on the valve seat (1) and used for opening and closing the air outlet (112), and the moisture absorbing element (4) is provided with a moisture absorbing cavity (41) communicating with the air inlet (111); when the moisture absorbing element (4) closes the air outlet (112), it simultaneously acts on the valve core assembly (2) to make the valve core assembly (2) open the air inlet (111); The valve core assembly (2) and the valve seat (1) are provided with an elastic element (3) driving the valve core assembly (2) to move upward to close the air inlet (111), the lower part of the moisture absorbing element (4) abuts on the valve core assembly (2), and when the moisture absorbing element (4) moves downward to close the air outlet (112), it simultaneously drives the valve core assembly (2) to move downward to compress the elastic element (3) to open the air inlet (111); The valve core assembly (2) comprises a main core body (21), the first sealing structure is arranged between the main core body (21) and the air inlet (111), and the second sealing structure is arranged between the moisture absorbing element (4) and the air outlet (112); The first sealing structure comprises a first boss (12) arranged at the air inlet (111) and a second boss (211) arranged at the lower part of the main core body (21) and capable of being pressed together with the first boss (12), and the first boss (12) and the second boss (211) are provided with a first sealing gasket (13); The second sealing structure comprises a third boss (14) arranged at the air outlet (112) and a fourth boss (43) arranged on the moisture absorbing element (4) and capable of being pressed together with the third boss (14), and the third boss (14) and the fourth boss (43) are provided with a second sealing gasket (15); When the air is extracted, the air extraction equipment is connected, the air is directly extracted outward, the first sealing structure does not need to be pressed downward to open, and thus the air extraction work can be completed without taking down the moisture absorbing element (4).

2. A gas valve according to claim 1, wherein: The middle part of the main core body (21) is provided with a one-way valve structure capable of communicating the inside and outside of the air inlet (111) and only allowing outward air.

3. A gas valve according to claim 2, wherein: The one-way valve structure comprises an air hole (212), and the air hole (212) is provided with a valve piece (213) or a plunger.

4. A gas valve according to claim 1, wherein: The upper end of the valve seat (1) is movably connected with a top cover (6) abutting on the moisture absorbing element (4) and capable of pressing downward the moisture absorbing element (4), and the top cover (6) is slidably connected with the valve seat (1) in the upward and downward directions or is screwed on the valve seat (1).

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