CN216270967U

CN216270967U - A bleeder valve and vacuum storage device for vacuum vessel

Info

Publication number: CN216270967U
Application number: CN202122159464.5U
Authority: CN
Inventors: 毛子梁; 汪晓波; 周义鹏
Original assignee: Hangzhou Freetron Industrial Co Ltd
Current assignee: Hangzhou Freetron Industrial Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-04-12
Anticipated expiration: 2031-09-08

Abstract

The utility model discloses an air extraction valve for a vacuum container, which comprises: the valve seat structure is provided with a valve seat channel communicated with the container cavity; the valve cover structure is detachably connected with the valve seat structure and comprises a first valve cover, a second valve cover and a third valve cover, and the third valve cover is provided with a first flow guide channel communicated with the outside; the second valve bonnet is provided with water conservancy diversion passageway two and holds the chamber, and the lower extreme of third valve bonnet is provided with the support protrusion that can be located and hold the intracavity, and holds the intracavity and be equipped with the gasket that can follow the air current motion, and the gasket can support to lean on in the support protrusion, or the gasket can support to lean on in the second valve bonnet and sealed water conservancy diversion passageway two. The utility model also discloses a vacuum storage device. According to the utility model, the sealing sheet capable of moving along with the air flow is arranged, when the external air extraction equipment is removed, the sealing sheet is automatically attached to the second valve cover due to the difference between the internal air pressure and the external air pressure, and the flow guide channel II is sealed, so that the gas suck-back is avoided in time, and the practicability is high.

Description

A bleeder valve and vacuum storage device for vacuum vessel

Technical Field

The utility model relates to the technical field of air extraction devices, in particular to an air extraction valve and a vacuum storage device for a vacuum container.

Background

The air extraction valve is mainly used for controlling gas to enter and exit, so that containers such as the storage box and the compression bag are kept in a vacuum state, and the air extraction valve is generally matched with a compressor and an air extractor for use. The operating principle of bleeder valve is the business turn over of control gas for air exhaust department produces the pressure differential with external atmospheric pressure, thereby the container reaches vacuum state, avoids article to appear weing, growing mould, rotten phenomenon in the storage process, and can also reduce greatly to the vacuum bag and accomodate the volume, portable facility.

A vacuum device of plastic packing bag is disclosed (Chinese patent No. CN201120282330.6), comprising a plastic packing bag with a through hole in the middle of a single plastic surface, a valve base is arranged on the through hole in the middle of the single plastic surface, an upper cover matched with the valve base is arranged at the other end of the valve base, a spring is arranged in the upper cover, and the front end of the spring is a rubber valve arranged in the valve base and matched with the spring; the valve base is in a shape that a raised cylinder is arranged in the middle, and a raised semicircular ring is arranged in the middle section of the excircle of the cylinder; the cylinder inboard is provided with bellied post, sets up one in the middle of the inboard basal plane of cylinder and is less than this plane concave circular groove, is provided with the gas pocket on the concave circular groove. Above-mentioned utility model under the effect of the outer atmospheric pressure of spring and bag, the rubber valve tightly pushes down the baseplane in the valve base circular slot, has prevented the reentrant of the outer air of bag, but this utility model needs the gaseous business turn over of cooperation spring control, and under long-time effect, the elasticity of spring weakens, and the practicality is poor.

For this reason, in combination with some suction valves currently available on the market, most suction valves generally have some of the following drawbacks: (1) when external air pumping is finished, pumped air can instantly flow back into the container, and the air pumping valve cannot timely control air back pumping; (2) the connecting piece of control gas in the bleeder valve poor stability, perhaps need cooperate spring part isotructure to use, the structure is complicated, and the practicality is not strong.

Disclosure of Invention

The utility model provides an air extraction valve and a vacuum storage device for a vacuum container, aiming at the defects in the prior art, and the sealing sheet which can move along with air flow is arranged, so that when external air extraction equipment is removed, the sealing sheet is automatically attached to the second valve cover due to the difference of internal and external air pressure, and the second flow guide channel is sealed, so that gas suck-back is avoided in time, the practicability is strong, and the stability is good.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

an extraction valve for a vacuum vessel comprising:

the valve seat structure can be arranged on the wall of the container and is provided with a valve seat channel communicated with the cavity of the container;

the valve cover structure is detachably connected with the valve seat structure and comprises a first valve cover capable of abutting against the upper end of the valve seat structure, a second valve cover positioned on the first valve cover and a third valve cover positioned on the second valve cover, and the third valve cover is provided with a first flow guide channel communicated with the outside;

the second valve bonnet is provided with the water conservancy diversion passageway two that communicates in the disk seat passageway and communicates in water conservancy diversion passageway one with the chamber that holds of water conservancy diversion passageway two, the lower extreme of third valve bonnet is provided with the support arch that can be located and hold the intracavity, just it is equipped with the gasket that can move along with the air current to hold the intracavity, the gasket can support to lean on in the support arch, or the gasket can support to lean on and seal on the second valve bonnet water conservancy diversion passageway two.

Preferably, the valve seat structure comprises a first base which can be positioned in the container and a second base which can penetrate through the wall of the container, wherein the second base is connected with the first base and is arranged along the longitudinal direction of the first base, and the second base is provided with the valve seat channel;

the lower end face of the first valve cover can abut against the upper end face of the first base, or the first valve cover is connected with the first base in an interference fit mode, and the second valve cover is connected with the second base.

Preferably, the second valve cap includes a second cap body i having the second guide passage, a second cap body ii extending upward along an upper end of the second cap body i, and a second cap body iii extending downward along a lower end of the second cap body i;

the second cover body II is provided with the containing cavity, the second cover body III is provided with a mounting cavity matched with the appearance of the second base, and the second cover body III is sleeved on the second base through the mounting cavity.

Preferably, the first second cover body comprises a first mounting part for mounting the third valve cover and the first valve cover, and a second mounting part extending downwards along the periphery of the first mounting part;

the second cover body II extends upwards along the upper end of the first mounting part, and the second cover body II and the first mounting part form the accommodating cavity with an opening at the upper part;

the second cover body three is formed by extending downwards along the lower end of the first installation part, the lower part of the third second cover body and the first installation part is provided with an opening, and the flow guide channel two is arranged on the first installation part and communicated with the accommodating cavity and the installation cavity.

Preferably, the upper end of the first mounting part is recessed downwards to form a first mounting groove for connecting a third valve cover, the first mounting groove surrounds the periphery of the second cover body, and the second mounting part and the second cover body are separated in three phases to form a second mounting groove for connecting the first valve cover;

the inner wall surface part of the third second cover body is internally concave to form a clamping groove, the outer wall of the second base is convexly provided with a clamping piece matched with the clamping groove, and the second base is separated from or installed with the three phases of the second cover body through the detachable connection of the clamping groove and the clamping piece.

Preferably, the first valve cover has flexibility, an installation channel for installing the second cover body three is arranged on the first valve cover, the first valve cover comprises a first cover body I which can be abutted against the outer wall surface of the container or the upper end of the first base and a second cover body II which extends upwards along the upper end of the first cover body I, and the second cover body can be connected into the second installation groove;

the first cover body comprises a first sealing part connected with the second cover body and a second sealing part extending along the periphery of the first sealing part and gradually inclining downwards, and the second sealing part can be attached to the outer wall surface of the container in a tight fit mode and is connected with the first base in an interference fit mode.

Preferably, the upper end of the first sealing part is recessed downwards to form a notch for connecting the second mounting part, and the notch surrounds the periphery of the second first cover body;

the upper end of first lid body two is provided with a plurality of connection sand grips, connect the lower extreme looks interference fit of sand grip and installation department one, the lower extreme of first lid body two is equipped with downwardly extending's installation arch, the installation arch is close to the inner wall end of installation passageway, the lower part of inner wall end inclines towards the installation arch gradually and forms oblique tip with the installation arch.

Preferably, the third valve cover comprises a first third cover body with the first flow guide channel and a second third cover body extending downwards along the periphery of the second third cover body, and the second third cover body can be connected into the first mounting groove;

the supporting bulges are provided with a plurality of supporting bulges and connected to the lower end face of the first third cover body, the supporting bulges are arranged in an annular shape and are spaced at intervals, the diameter among the supporting bulges is smaller than that of the sealing sheet, and the sealing sheet can be abutted against the lower ends of the supporting bulges;

the outer diameter of the second cover body II is equal to or smaller than the inner diameter of the third cover body II, the outer diameter of the second cover body III is equal to or smaller than the diameter of the mounting channel, the longitudinal height of the second cover body III is smaller than or equal to the longitudinal height of the second base protruding upwards from the upper end face of the first base, and the diameter of the second cover body I is equal to or smaller than the diameter of the first base.

Preferably, an air-permeable dustproof piece is arranged in the valve seat channel, a supporting seat for restraining the dustproof piece is arranged at the lower end of the second base, and a third flow guide channel for communicating the container cavity with the valve seat channel is formed in the supporting seat.

A vacuum storage device, comprising: the extraction valve of any of the above; the vacuum container comprises a container wall surrounding a container cavity, the air suction valve is detachably connected with the container wall, and the air suction valve can exhaust gas in the container cavity through external air suction equipment and form a vacuum state.

The utility model mainly obtains the following beneficial effects:

(1) the utility model is provided with the sealing sheet which can move along with the air flow, the sealing sheet is automatically attached to the second valve cover due to the difference of the internal air pressure and the external air pressure, and the second flow guide channel is sealed, so that the gas can be prevented from being sucked backwards in time, the structure is simplified, the stability is good, and the practicability is very strong.

(2) In the utility model, the first valve cover is a silica gel cover or other flexible soft rubber sealing elements, so that the lower end surface of the first valve cover can be tightly attached to the wall surface of the container and is in interference fit with the upper end surface of the first base, thereby avoiding gas leakage and having strong sealing property.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

fig. 1 is a schematic view of the overall structure of an air extraction valve according to an embodiment of the present invention.

Fig. 2 is an exploded view of the air extraction valve according to an embodiment of the present invention.

Fig. 3 and 4 are schematic cross-sectional views of the air extraction valve according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a valve seat according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of a valve seat according to an embodiment of the present invention.

Fig. 7 is an overall schematic view of a first valve cover according to an embodiment of the disclosure.

Fig. 8 is a cross-sectional schematic view of a first valve cover according to an embodiment of the disclosure.

Fig. 9 is an overall schematic view of a second valve cover and sealing disc disclosed in an embodiment of the utility model.

Fig. 10 and 11 are cross-sectional schematic views of a second valve cover and sealing disc according to an embodiment of the present disclosure.

Fig. 12 is an overall schematic view of a third valve cover disclosed in an embodiment of the utility model.

Fig. 13 is a schematic cross-sectional view of a third valve cover according to an embodiment of the disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

As shown in fig. 1 to 5, as a first embodiment of the present invention, an air-extracting valve for a vacuum container is disclosed, which is applied to various articles to be extracted, such as storage bags, storage boxes, etc., and is generally used in combination with an air-extracting pump to extract air from the container to a vacuum state. The extraction valve mainly comprises a valve seat structure 100 and a valve cover structure 200, wherein the valve seat structure 100 can be installed on the wall of a container, the valve seat structure 100 is provided with a valve seat passage 101 communicated with the accommodating cavity, the valve cover structure 200 is detachably connected with the valve seat structure 100, and the valve cover structure 200 comprises a first valve cover 1 which can abut against the upper end of the valve seat structure 100, a second valve cover 2 positioned on the first valve cover 1, and a third valve cover 3 positioned on the second valve cover 2. The third valve cover 3 is provided with a first flow guide channel 202 communicated with the outside, the second valve cover 2 is provided with a second flow guide channel 201 communicated with the valve seat channel 101 and an accommodating cavity 203 communicated with the first flow guide channel 202 and the second flow guide channel 201, the lower end of the third valve cover 3 is provided with a supporting protrusion 31 capable of being located in the accommodating cavity 203, a sealing sheet 4 capable of moving along with air flow is arranged in the accommodating cavity 203, the sealing sheet 4 can be abutted against the supporting protrusion 31, or the sealing sheet 4 can be abutted against the second valve cover 2 and seal the second flow guide channel 201. In actual use, the valve seat structure 100 may be fixed to the container wall, or the valve seat structure 100 is detachably connected to the container wall, and therefore, the valve seat structure can be applied to other containers, and in addition, the valve cover structure 200 mainly comprises a first valve cover 1, a second valve cover 2 and a third valve cover 3, wherein the third valve cover 3 is a top cover and is communicated with the outside through a first flow guide channel 202, the second valve cover 2 is an intermediate cover and is communicated with the valve seat channel 101 through a second flow guide channel 201, so that the air flow in the container cavity can be led out through the valve seat channel 101, the second flow guide channel 201 and the first flow guide channel 202 in sequence, and the third valve cover 3 has no flow guide effect, but can be tightly attached to the upper end of the container wall and/or the valve seat structure 100 to prevent the air flow from being discharged or entered from the installation gap. In addition, the second valve cover 2 is provided with an accommodating cavity 203 communicated with the first flow guide channel 202 and the second flow guide channel 201, and the sealing sheet 4 is positioned in the accommodating cavity 203, so that in the actual operation process, when the air extraction equipment is connected with the air extraction valve, the air extraction equipment needs to extract air in the container cavity, the air extraction force of the air extraction pump is greater than the air pressure in the container cavity, the sealing sheet 4 moves upwards along with the air flow and abuts against the supporting bulge 31, so that the air flow in the container cavity is led out outwards through the valve seat channel 101, the second flow guide channel 201 and the first flow guide channel 202 in sequence, and the air pressure in the container cavity is reduced or reaches a vacuum state; on the contrary, after the air extraction equipment is removed, the external atmospheric pressure is greater than the air pressure in the container cavity, the sealing sheet 4 moves downwards along with the air flow and is abutted against the second valve cover 2, and the guide channel II 201 is sealed, so that the air flow in the container cavity cannot be led out outwards, and the air pressure in the container cavity is kept in a low-pressure state or the container cavity is kept in a vacuum state. Therefore, the utility model is provided with the sealing sheet 4 which can move along with the air flow, the sealing sheet 4 is automatically attached to the second valve cover 2 due to the difference of the internal air pressure and the external air pressure, and the second diversion channel 201 is sealed, so that the gas can be prevented from being sucked backwards in time, the structure is simplified, the stability is good, and the practicability is strong.

As another embodiment of the present invention, the valve seat structure 100 includes a first seat 102 which can be located inside the container, and a second seat 103 which can penetrate through the wall of the container, the second seat 103 being connected to the first seat 102 and being disposed along the longitudinal direction of the first seat 102, and the second seat 102 having a valve seat passage 101. In this embodiment, the valve seat structure 100 is mainly composed of a first seat 102 and a second seat 103, wherein the first seat 102 can be located in the container or attached to the wall surface of the container, the second seat 103 is perpendicular to the first seat 102 and can penetrate the wall of the container, a portion of the second seat 103 is located outside the container, a portion of the second seat 103 is located in the cavity of the container, and the valve seat channel 101 is longitudinally disposed on the second seat 103, so that the valve seat channel 101 can also communicate with the outside and the cavity of the container. In other embodiments, the lower end surface of the first valve cover 1 may abut against the upper end surface of the first seat 102, or the first valve cover 1 is connected with the first seat 102 in an interference fit manner, and the second valve cover 103 is connected with the second seat 102. In this embodiment, when the valve cover structure 200 is connected to the valve seat structure 100, the lower end surface of the first valve cover 1 is in interference fit with the first base 102, and it should be noted that if there is a container, the lower end surface of the first valve cover 1 is firstly pressed on the wall surface of the container and then in interference fit with the first base 102, so that the three are tightly connected to avoid gas leakage, and the valve cover structure is stable in structure and has good tightness.

As shown in fig. 5 to 13, as another embodiment of the present invention, the second valve cover 2 includes a second cover body 21 having a flow guide channel two 201, a second cover body two 22 extending upward along an upper end of the second cover body 21, and a second cover body three 23 extending downward along a lower end of the second cover body one 21, in a specific embodiment, the second cover body two 22 has an accommodating cavity 203, the second cover body three 23 has a mounting cavity 204 matching with the shape of the second base 103, and the second cover body three 23 is sleeved on the second base 103 through the mounting cavity 204. In other embodiments, the first second cover body 21 includes a first mounting portion 211 for mounting the third valve cover 3 and the first valve cover 1, and a second mounting portion 212 extending downward along the outer circumference of the first mounting portion 211, specifically, the second cover body 22 extends upward along the upper end of the first mounting portion 211, and the second cover body 22 and the first mounting portion 211 form an accommodating cavity 203 with an opening at the upper part. In another embodiment, the second cover body three 23 extends downwards along the lower end of the first mounting portion 211, the second cover body three 23 and the first mounting portion 211 form a mounting cavity 203 with an opening at the lower part, and the second flow guide channel 201 is arranged on the first mounting portion 211 and is communicated with the accommodating cavity 203 and the mounting cavity 204. In another embodiment, the upper end of the first mounting portion 211 is recessed downward to form a first mounting groove 213 for the third valve cover 3 to connect, the first mounting groove 213 surrounds the outer circumference of the second cover body 22, and the second mounting portion 212 and the third cover body 23 are separated to form a second mounting groove 214 for the first valve cover 1 to connect. In other embodiments, the inner wall of the third cover body 23 is recessed to form a locking groove 231, the outer wall of the second base 103 is protruded with a locking piece 232 matching with the locking groove 231, and the second base 103 is separated from or mounted on the third cover body 23 by the detachable connection of the locking groove 231 and the locking piece 232. Therefore, in the present invention, the second valve cover 2 has the function of receiving and supporting the first valve cover 1 and the third valve cover 3, and the structure is stable and reliable, and on the other hand, the second valve cover 2 has the receiving cavity 203, which mainly receives and/or moves the sealing sheet 4, so as to conduct or seal, and the structure is reasonable.

As another embodiment of the present invention, the first valve cover 1 has flexibility, and the first valve cover 1 is provided with a mounting channel 123 for mounting the second cover body three 23, the first valve cover 1 includes a first cover body 121 capable of abutting against the outer wall surface of the container or the upper end of the first base 102, and a second cover body 122 extending upward along the upper end of the first cover body 121, and the second cover body 122 can be connected to the mounting groove 214. Specifically, the first cap body 121 includes a first sealing portion 1211 connected to the second cap body 122, and a second sealing portion 1212 extending along an outer circumference of the first sealing portion 1211 and gradually inclining downward, and the second sealing portion 1212 can be tightly attached to an outer wall surface of the container and connected to the first base 102 in an interference fit manner. In another embodiment, the upper end of the first sealing portion 1211 is recessed downward to form a notch 1213 for the connection of the second mounting portion 1212, and the notch 1213 surrounds the outer circumference of the second first cover body 122. In another embodiment, the upper end of the second cover body 122 is provided with a plurality of connecting protruding strips, the connecting protruding strips are in interference fit with the lower end of the first mounting portion 211, the lower end of the second cover body 122 is provided with a downwardly extending mounting protrusion, the mounting protrusion is close to the inner wall end of the mounting channel, and the lower portion of the inner wall end gradually inclines towards the mounting protrusion and forms an inclined end portion with the mounting protrusion. It should be noted that, in the present invention, the first valve cover 1 is configured as a silicone cover or other flexible soft rubber sealing member, so that the lower end surface of the first valve cover 1 can be tightly attached to the wall surface of the container and is in interference fit with the upper end surface of the first base 102, thereby avoiding gas leakage and having strong sealing performance.

As another embodiment of the present invention, the third valve cover 3 includes a first third cover body 32 having a first flow guide passage 202, and a second third cover body 33 extending downward along the outer circumference of the first third cover body 32, and the second third cover body 31 may be coupled to the first mounting groove 213. In another embodiment, the supporting protrusions 31 are provided with a plurality of supporting protrusions 31 connected to the lower end surface of the first third cover body 32, the supporting protrusions 31 are arranged in a ring shape and spaced apart from each other, the diameter between the supporting protrusions 31 is smaller than that of the sealing sheet 4, and the sealing sheet 41 can abut against the lower end of the supporting protrusions 31. In some embodiments, the outer circumferential diameter of the second cap body two 122 is equal to or smaller than the inner circumferential diameter of the third cap body two 33, the outer circumferential diameter of the second cap body three 23 is equal to or smaller than the diameter of the mounting passage 123, the longitudinal height of the second cap body three 23 is smaller than or equal to the longitudinal height of the upward projection of the second seat 103 from the upper end surface of the first seat 102, and the diameter of the second cap body one 21 is equal to or smaller than the diameter of the first seat 102. In another embodiment, an air-permeable dust-proof member 112 is disposed in the valve seat channel 101, a supporting seat 24 for restraining the dust-proof member 112 is disposed at the lower end of the second base 2, and a third flow guide channel 241 for communicating the container cavity with the valve seat channel 101 is disposed on the supporting seat 24.

The utility model also discloses a vacuum storage device, which comprises the air extraction valve and the vacuum storage container in any embodiment, wherein the vacuum storage container can be a storage bag, a storage box and the like, the vacuum storage container comprises a container wall surrounding to form a container cavity, the air extraction valve can be detachably connected with the container wall, and the air extraction valve can exhaust gas in the container cavity through external air extraction equipment and form a low-pressure or vacuum state.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

1. An extraction valve for a vacuum vessel, comprising:

2. The extraction valve according to claim 1, wherein: the valve seat structure comprises a first base which can be positioned in the container and a second base which can penetrate through the wall of the container, the second base is connected with the first base and is arranged along the longitudinal direction of the first base, and the second base is provided with the valve seat channel;

3. The extraction valve according to claim 2, wherein: the second valve cover comprises a first second cover body with a second diversion channel, a second cover body extending upwards along the upper end of the first second cover body, and a third second cover body extending downwards along the lower end of the first second cover body;

4. The extraction valve according to claim 3, wherein: the first second cover body comprises a first mounting part for mounting the third valve cover and the first valve cover and a second mounting part extending downwards along the periphery of the first mounting part;

5. The extraction valve according to claim 4, wherein: the upper end of the first mounting part is downwards sunken to form a first mounting groove for connecting a third valve cover, the first mounting groove surrounds the periphery of a second cover body, and the second mounting part and the second cover body are separated in three phases to form a second mounting groove for connecting the first valve cover;

6. The extraction valve according to claim 5, wherein: the first valve cover is flexible, an installation channel for installing the second cover body III is formed in the first valve cover, the first valve cover comprises a first cover body I which can abut against the outer wall surface of the container or the upper end of the first base and a second cover body II which extends upwards along the upper end of the first cover body I, and the second cover body II can be connected into the second installation groove;

7. The extraction valve according to claim 6, wherein: the upper end of the first sealing part is downwards sunken to form a notch for connecting the second mounting part, and the notch surrounds the periphery of the second first cover body;

8. The extraction valve according to claim 7, wherein: the third valve cover comprises a first third cover body with the first flow guide channel and a second third cover body extending downwards along the periphery of the second third cover body, and the second third cover body can be connected into the first mounting groove;

9. The extraction valve according to claim 2 or 8, wherein: an air-permeable dustproof piece is arranged in the valve seat channel, a supporting seat for restraining the dustproof piece is arranged at the lower end of the second base, and a third flow guide channel for communicating the container cavity with the valve seat channel is formed in the supporting seat.

10. A vacuum storage device, comprising:

the suction valve of any one of claims 1 to 9;

the vacuum container comprises a container wall surrounding a container cavity, the air suction valve is detachably connected with the container wall, and the air suction valve can exhaust gas in the container cavity through external air suction equipment and form a vacuum state.