Cover opening device

Abstract

The utility model provides a cover opening device which comprises a body, a sealing cover, a sealing ring structure and a locking structure. The body comprises a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall jointly define an inner cavity, an opening is formed in the top of the body, a through hole is formed in the bottom wall, and an adsorbent is arranged in the inner cavity; the sealing cover is arranged at the opening in an openable and closable manner; the sealing ring structure is connected to the outer surface of the bottom wall and used for being connected to the barrel cover and the barrel opening in a sleeving mode. The locking structure is connected to the outer surface of the bottom wall, located within the range of the sealing ring structure and used for being adjustably fixed to the barrel cover and transmitting torque generated when the body rotates to the barrel cover.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil canning process equipment, in particular to a cover opening device. Background Art

[0002] Lubricating oil is widely used in aviation, aerospace, steel, automobile and other industries. It has the functions of anti-oxidation, anti-corrosion, extreme pressure and anti-friction. Lubricating oil is usually blended at high temperature during production and precisely filled at appropriate temperature and flow rate. Therefore, after filling, the barrel is usually under negative pressure at ambient temperature. The commonly used lubricating oil packaging barrel cover is a rotating cover. The moment the barrel cover is opened, the low-pressure environment in the barrel quickly inhales air to increase the pressure, which causes the moisture in the air to be inhaled into the barrel at the same time. The moisture is quickly adsorbed and solidified on the surface of the oil, and then aggregated under the action of the dispersant in the oil, and finally forms a micro-emulsion and sinks to the bottom of the barrel. This phenomenon is particularly obvious in low-temperature environments, which directly leads to misjudgment of oil products during sampling and analysis, and may even lead to reduced oil performance.

[0003] Chinese utility model patent CN214495657U provides a sealed barrel cover opening tool, which includes a handle, a support plate, and a pry plate; Chinese utility model patent CN215558879U provides a portable cover opening tool, which includes a handle, a can opening mechanism, and a twisting mechanism; Chinese utility model patent CN220485294U discloses a chemical oil barrel sealed cover opening device, which includes a cover opening handle and a spacing adjustment unit. All of the above patents have the problem of water contamination when opening the cover. Utility Model Content

[0004] A main purpose of the utility model is to overcome at least one defect of the prior art and provide a cover opening device which can avoid the problem of water contamination when opening the cover.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, there is provided a lid opening device for releasing pressure on the lid of a packaging barrel, wherein the lid opening device comprises a body, a sealing cover, a sealing ring structure and a locking structure; the body comprises a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall together enclose an inner cavity and form an opening at the top of the body, the bottom wall is provided with a through hole, and an adsorbent is arranged in the inner cavity; the sealing cover is openably and closably arranged at the opening; the sealing ring structure is connected to the outer surface of the bottom wall, and is used to be sleeved on the barrel lid and the barrel mouth; the locking structure is connected to the outer surface of the bottom wall and is located within the range of the sealing ring structure, and is used to be adjustably fixed to the barrel lid and transmit the torque when the body rotates to the barrel lid.

[0007] According to one embodiment of the present utility model, the sealing ring structure includes a connecting portion and a sealing portion; the connecting portion is annular and one end of which is connected to the outer surface of the bottom wall; the sealing portion is annular and one end of which is connected to the other end of the connecting portion, and the other end of the sealing portion is used to be sleeved on the barrel cover and the barrel mouth, and the sealing portion is made of rubber.

[0008] According to one embodiment of the utility model, the main body is provided with a circular slideway on the outer surface of the bottom wall, the sealing ring structure is circular, and one end thereof is slidably matched with the slideway so that the sealing ring structure can be rotatably connected to the outer surface of the bottom wall.

[0009] According to one embodiment of the present invention, along the axial direction of the sealing ring structure, one end of the sealing ring structure away from the body exceeds one end of the locking structure away from the body.

[0010] According to one embodiment of the present invention, the barrel cover is made of metal, and the locking structure is a magnetic structure, which is used for magnetically fixing with the barrel cover.

[0011] According to one embodiment of the present invention, the bottom wall is provided with at least two through holes.

[0012] According to one embodiment of the present invention, the adsorbent is made of a regenerable adsorbent material.

[0013] According to one embodiment of the present utility model, the cover opening device further includes a filter membrane; the filter membrane is arranged on the inner surface of the bottom wall.

[0014] According to one embodiment of the present invention, the cover opening device further includes a handle, and the handle is connected to the outer surface of the side wall.

[0015] According to one embodiment of the present invention, the cover is threadably matched with the body; and / or the body is made of a transparent material; and / or the cover is made of a transparent material.

[0016] It can be seen from the above technical solution that the advantages and positive effects of the cover opening device proposed by the utility model are:

[0017] The lid opening device proposed in the utility model comprises a body, a sealing cover, a sealing ring structure and a locking structure; the body comprises a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall together enclose an inner cavity and form an opening at the top of the body, the bottom wall is provided with a through hole, and an adsorbent is arranged in the inner cavity; the sealing cover can be opened and closed at the opening; the sealing ring structure is connected to the outer surface of the bottom wall, and is used to be sleeved on the barrel cover and the barrel mouth; the locking structure is connected to the outer surface of the bottom wall and is located within the range of the sealing ring structure, and is used to be adjustably fixed to the barrel cover and transmit the torque when the body rotates to the barrel cover. Through the above structural design, the utility model uses the adsorbent to absorb moisture in the air, and uses the sealing ring structure to prevent the outside air from entering the packaging barrel during the lid opening process, thereby effectively preventing the lubricating oil product in the packaging barrel from being contaminated by moisture during the lid opening process. Furthermore, the utility model has a simple structure and is easy to operate. The detachable connection between the sealing cover and the body can facilitate the replacement of the adsorbent, and the sealing cover can effectively isolate the influence of moisture in the air on the adsorbent, thereby extending the use time of the adsorbent. In addition, the utility model can utilize the locking structure to transmit the torque of the body to the packaging cover, thereby realizing the rotation of the body to drive the barrel cover to rotate. Since the screw-type barrel cover is widely used in packaging barrels, the application range of the utility model is relatively wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0019] Figure 1 is a schematic structural diagram of a cover opening device according to an exemplary embodiment.

[0020] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in FIG.

[0021] Figure 3 yes Figure 1 A schematic diagram of the cover opening device in use is shown.

[0022] The following are the descriptions of the reference numerals:

[0023] 100. Cover opening device;

[0024] 110. Ontology;

[0025] 111. Bottom wall;

[0026] 112. Side wall;

[0027] 113. Inner cavity;

[0028] 114. Open your mouth;

[0029] 115.Through hole;

[0030] 120. Adsorbent;

[0031] 130. Capping;

[0032] 140. Sealing ring structure;

[0033] 141. Connecting part;

[0034] 142. Sealing part;

[0035] 150. Locking structure;

[0036] 160. Filter membrane;

[0037] 170. Handle;

[0038] 200. Packaging barrel;

[0039] 210. Barrel cover;

[0040] X. Axial. DETAILED DESCRIPTION

[0041] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0042] In the following description of different exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part of the utility model and in which different exemplary structures, systems and steps that can implement multiple aspects of the utility model are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the utility model. Moreover, although the terms "above", "between", "within", etc. can be used in this specification to describe different exemplary features and elements of the utility model, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the utility model.

[0043] See also Figure 1, which is a representative structural schematic diagram of the cover opening device 100 proposed by the utility model. In this exemplary embodiment, the cover opening device 100 proposed by the utility model is described by taking the application of opening the cover of the packaging barrel 200 of lubricating oil as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the utility model to the opening operation of other types of packaging barrels 200, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the cover opening device 100 proposed by the utility model.

[0044] like Figure 1 As shown, in one embodiment of the present invention, the cover opening device 100 provided by the present invention is used to release pressure and open the barrel cover 210 of the packaging barrel 200. The cover opening device 100 includes a body 110, a sealing cover 130, a sealing ring structure 140 and a locking structure 150. Figure 2 and Figure 3 , Figure 2 Representatively shown in Figure 1 An enlarged schematic diagram of part A in FIG. Figure 3 The schematic diagram of the use state of the cover opening device 100 is representatively shown in FIG. The structure, connection mode and functional relationship of each main component of the cover opening device 100 proposed by the utility model will be described in detail below in conjunction with the above drawings.

[0045] like Figures 1 to 3As shown, in one embodiment of the present utility model, the body 110 includes a bottom wall 111 and a side wall 112 connected to the bottom wall 111, and the bottom wall 111 and the side wall 112 together enclose an inner cavity 113 of the body 110, and the inner cavity 113 forms an opening 114 at the top of the body 110. In other words, the body 110 is roughly a barrel-shaped structure. On this basis, the bottom wall 111 is provided with a through hole 115, and an adsorbent 120 is arranged in the inner cavity 113, and the adsorbent 120 can at least adsorb moisture in the gas flowing through. The cover 130 is openably arranged at the opening 114 of the body 110. The sealing ring structure 140 is connected to the outer surface of the bottom wall 111 (i.e., the bottom surface of the bottom wall 111 shown in the figure), and the sealing ring structure 140 is used to be sleeved on the barrel cover 210 and the barrel mouth, so as to ensure the sealing of the packaging barrel 200 when the cover is opened. The locking structure 150 is connected to the outer surface of the bottom wall 111, and the locking structure 150 is located within the range of the sealing ring structure 140. The locking structure 150 is used to be adjustably fixed to the barrel cover 210. For example, the locking structure 150 can be switched between a locked state and a released state. In the locked state, the locking structure 150 is fixedly connected to the barrel cover 210. In the released state, the locking structure 150 and the barrel cover 210 can be relatively movable and separated. In the locked state, the locking structure 150 can transmit the torque of the body 110 when it rotates to the barrel cover 210. As mentioned above, when it is necessary to open the barrel cover 210 of the packaging barrel 200, the end of the sealing ring structure 140 of the opening device 100 away from the main body 110 is sleeved on the barrel cover 210 and the barrel mouth, the sealing cover 130 is opened, and the locking structure 150 is used to fix the connection with the barrel cover 210 (for example, the locking structure 150 is switched to a locked state), and then the main body 110 is rotated so that the barrel cover 210 is driven to rotate via the locking structure 150, thereby realizing the opening of the barrel cover 210 of the screw-type (i.e., threaded) type.

[0046] Through the above structural design, the utility model uses the adsorbent 120 to absorb moisture in the air, and uses the sealing ring structure 140 to prevent outside air from entering the packaging barrel 200 during the opening process, thereby effectively preventing the lubricating oil product in the packaging barrel 200 from being contaminated by moisture during the opening process. Furthermore, the utility model has a simple structure and is easy to operate. The detachable connection between the cover 130 and the body 110 can facilitate the replacement of the adsorbent 120, and the cover 130 can effectively isolate the influence of moisture in the air on the adsorbent 120, thereby extending the use time of the adsorbent 120. In addition, the utility model can use the locking structure 150 to transfer the torque of the body 110 to the packaging cover, thereby realizing the rotation of the body 110 to drive the barrel cover 210 to rotate. Since the screw-type barrel cover 210 is widely used in the packaging barrel 200, the application range of the utility model is relatively wide.

[0047] It should be noted that the sealing ring structure 140 is sleeved on the barrel cover 210 and the barrel mouth of the packaging barrel 200, which means that in the axial direction X, the end of the sealing ring structure 140 away from the body 110 exceeds the barrel cover 210 and is sleeved on part of the barrel body, that is, the outer periphery of part of the barrel mouth structure of the packaging barrel 200. On this basis, at the moment when the barrel cover 210 is opened, the barrel cover 210 is separated from the barrel mouth. At this time, since the sealing ring structure 140 is sleeved on the barrel mouth, the gap generated by the above separation remains sealed, and the external air can only enter the barrel mouth through the cover opening device 100 (such as the adsorbent 120), thereby ensuring the effective sealing of the barrel cover 210 at the moment of pressure relief opening.

[0048] Specifically, by using the adsorbent 120 (which may further include the filter membrane 160 described below), the lid opening device 100 proposed by the utility model can effectively remove moisture (which may further include impurities such as particulate matter described below) in the air, and realizes the lid opening function of adsorption, filtration, and pressure relief while ensuring that the lubricating oil product is not contaminated. When the pressure inside and outside the packaging barrel 200 reaches equilibrium, the lid opening device 100 is stopped, and the environment that pollutes the lubricating oil product no longer exists, thereby ensuring the accuracy of sampling and the safety of product use.

[0049] In one embodiment of the present invention, the body 110 may be made of a hard material, such as but not limited to metal, plastic, etc. Accordingly, the present invention can ensure the structural strength of the body 110 .

[0050] like Figures 1 to 3 As shown, in one embodiment of the present invention, the sealing ring structure 140 may include a connecting portion 141 and a sealing portion 142. Specifically, the connecting portion 141 is annular, and one end of the connecting portion 141 is connected to the outer surface of the bottom wall 111. The sealing portion 142 is annular, and one end of the sealing portion 142 is connected to the other end of the connecting portion 141, and the other end of the sealing portion 142 is used to be sleeved on the outer periphery and the mouth of the barrel cover 210, wherein the material of the sealing portion 142 may be rubber. Through the above structural design, the present invention can use the connecting portion 141 to realize the connection between the sealing ring structure 140 and the bottom wall 111 of the body 110, and at the same time, can use the sealing portion 142 made of rubber to ensure a good sealing effect with the barrel cover 210.

[0051] Based on the structural design that the sealing ring structure 140 includes a connecting portion 141, in one embodiment of the utility model, the connecting portion 141 can be made of a hard material, such as but not limited to metal, plastic, etc. Accordingly, the utility model can ensure the structural strength of the connecting portion 141, and further ensure the connection strength between the sealing ring structure 140 and the bottom wall 111 of the main body 110 and the supporting effect on the sealing portion 142.

[0052] In an embodiment not shown in the figure of the present utility model, the main body 110 may be provided with an annular slideway on the outer surface of the bottom wall 111, and correspondingly, the sealing ring structure 140 may be annular, and one end of the sealing ring structure 140 (for example, the end of the connecting portion 141 away from the sealing portion 142) is slidably matched with the slideway, so that the sealing ring structure 140 is rotatably connected to the outer surface of the bottom wall 111. Through the above structural design, the utility model can realize the relative rotation between the main body 110 and the sealing ring structure 140, and accordingly, during the opening process, the sealing ring structure 140 does not rotate with the rotation of the main body 110, that is, the sealing ring structure 140 can maintain a relatively static sleeve connection with the barrel cover 210, thereby further improving the sealing effect of the sealing ring structure 140 and the barrel cover 210.

[0053] like Figure 1 As shown, in one embodiment of the present invention, along the axial direction X (e.g., the vertical direction in the figure) of the sealing ring structure 140, the end of the sealing ring structure 140 away from the body 110 can exceed the end of the locking structure 150 away from the body 110. In other words, in the axial direction X, the locking structure 150 is completely located within the range of the sealing ring structure 140. Through the above structural design, the present invention can ensure that the sealing ring structure 140 and the barrel cover 210 are in a deeper sleeve relationship in the axial direction X after the locking structure 150 is locked with the barrel cover 210, thereby further improving the sealing effect of the sealing ring structure 140 and the barrel cover 210.

[0054] In one embodiment of the present invention, when the barrel cover is made of metal, the locking structure 150 may be a magnetic structure, which is used to be magnetically fixed to the barrel cover. In other embodiments of the present invention, the locking structure 150 may also adopt other structural designs, such as a physical locking structure, which may be a snap-on, sleeve-on, etc., and is not limited to the above embodiments.

[0055] In one embodiment of the present invention, the locking structure 150 may be made of a hard material, such as but not limited to metal, plastic, etc. Accordingly, the present invention can ensure the structural strength of the locking structure 150 .

[0056] like Figure 2 As shown, in one embodiment of the present invention, the bottom wall 111 of the body 110 may be provided with at least two through holes 115. Through the above structural design, the present invention can improve the air permeability of the bottom wall 111 and further optimize the pressure relief rate and pressure relief effect during the opening process.

[0057] Based on the structural design that the bottom wall 111 is provided with at least two through holes 115, in one embodiment of the present invention, the at least two through holes 115 can be arranged symmetrically or in a matrix, etc. Through the above structural design, the present invention can further optimize the uniformity of the ventilation function at each position of the bottom wall 111.

[0058] In one embodiment of the present invention, the material of the adsorbent 120 may be a renewable adsorbent material, thereby enabling the adsorbent 120 to be reused, which is beneficial for saving material costs.

[0059] like Figure 2 As shown, in one embodiment of the present invention, the lid opening device 100 proposed by the present invention may further include a filter membrane 160. The filter membrane 160 is arranged on the inner surface of the bottom wall 111 (i.e., the top surface of the bottom wall 111 shown in the figure). Through the above structural design, during the lid opening process, the air flowing in through the opening 114 passes through the adsorbent 120 and the filter membrane 160 and then passes through the through hole 115 to enter the packaging barrel 200. The present invention can thereby fully adsorb and filter impurities such as moisture and particulate matter in the air, and further avoid the pollution of the product in the packaging barrel 200 caused by the lid opening.

[0060] like Figure 1 and Figure 3 As shown, in one embodiment of the present invention, the cover opening device 100 provided by the present invention may further include a handle 170. The handle 170 is connected to the outer surface of the side wall 112 of the body 110. Through the above structural design, the present invention allows the operator to hold the handle 170 to apply force to rotate the body 110, and the force required is reduced by extending the force arm, making the cover opening action more labor-saving and convenient.

[0061] Based on the structural design that the switch device includes the handle 170 , in one embodiment of the present utility model, when the cross section of the body 110 is circular, the handle 170 can extend along the radial direction of the corresponding circle of the cross section of the body 110 .

[0062] Based on the structural design of the switch device including the handle 170 , in one embodiment of the present invention, the handle 170 may be made of a hard material, such as but not limited to metal, plastic, etc. Accordingly, the present invention can ensure the structural strength of the handle 170 .

[0063] In one embodiment of the utility model, the material of the sealing cover 130 can be a sealed and airtight material, such as but not limited to metal or plastic, thereby ensuring that the opening device 100 can effectively close the opening 114 through the sealing cover 130 when not in use, thereby isolating the influence of moisture in the air on the adsorbent 120, which is beneficial to extending the service life of the adsorbent 120.

[0064] In one embodiment of the present invention, the cover 130 and the body 110 may be threaded. For example, the cover 130 has a flange on the side facing the body 110, and the inner surface of the flange is provided with an internal thread. The outer surface of the body 110 at the opening 114 is provided with an external thread, and the cover 130 and the body 110 are disassembled and assembled through the threaded engagement of the external thread and the internal thread. Through the above structural design, the present invention can facilitate the disassembly and assembly of the cover 130 and the body 110, which is conducive to improving the convenience of operation.

[0065] In one embodiment of the present invention, the body 110 can be made of a transparent material. Through the above design, the present invention can facilitate the operator to observe the use status of the internal adsorbent 120 (or also including the filter membrane 160) through the transparent body 110, so as to timely determine whether it needs to be replaced, thereby ensuring that the cover opening device 100 always maintains a good functional state.

[0066] In one embodiment of the present invention, the cover 130 can be made of a transparent material. Through the above design, the present invention can facilitate the operator to observe the use status of the internal adsorbent 120 (or the filter membrane 160) through the transparent cover 130, so as to timely determine whether it needs to be replaced, thereby ensuring that the cover opening device 100 always maintains a good functional state.

[0067] It should be noted that the cover opening device 100 shown in the drawings and described in this specification is only a few examples of many kinds of cover opening devices 100 that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details of the cover opening device 100 shown in the drawings or described in this specification or any parts of the cover opening device 100.

[0068] In summary, the lid opening device 100 proposed in the utility model includes a main body 110, a sealing cover 130, a sealing ring structure 140 and a locking structure 150; the main body 110 includes a bottom wall 111 and a side wall 112 connected to the bottom wall 111, the bottom wall 111 and the side wall 112 together enclose an inner cavity 113 and form an opening 114 at the top of the main body 110, the bottom wall 111 is provided with a through hole 115, and an adsorbent 120 is arranged in the inner cavity 113; the sealing cover 130 is openably and closably arranged at the opening 114; the sealing ring structure 140 is connected to the outer surface of the bottom wall 111, and is used to be sleeved on the outer periphery and the barrel mouth of the barrel cover 210; the locking structure 150 is connected to the outer surface of the bottom wall 111 and is located within the range of the sealing ring structure 140, and is used to be adjustably fixed to the barrel cover 210 and transmit the torque when the main body 110 rotates to the barrel cover 210. Through the above structural design, the utility model uses the adsorbent 120 to absorb moisture in the air, and uses the sealing ring structure 140 to prevent outside air from entering the packaging barrel 200 during the opening process, thereby effectively preventing the lubricating oil product in the packaging barrel 200 from being contaminated by moisture during the opening process. Furthermore, the utility model has a simple structure and is easy to operate. The detachable connection between the cover 130 and the body 110 can facilitate the replacement of the adsorbent 120, and the cover 130 can effectively isolate the influence of moisture in the air on the adsorbent 120, thereby extending the use time of the adsorbent 120. In addition, the utility model can use the locking structure 150 to transfer the torque of the body 110 to the packaging cover, thereby realizing the rotation of the body 110 to drive the barrel cover 210 to rotate. Since the screw-type barrel cover 210 is widely used in the packaging barrel 200, the application range of the utility model is relatively wide.

[0069] The exemplary embodiments of the cover opening device proposed by the utility model are described and / or illustrated in detail above. However, the embodiments of the utility model are not limited to the specific embodiments described here. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described here. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated here, the terms "one", "one" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate the meaning of open-ended inclusion and mean that in addition to the listed elements / components / etc., other elements / components / etc. may also exist. In addition, the terms "first" and "second" in the claims and the specification are used only as marks and are not numerical restrictions on their objects.

[0070] Although the cover opening device of the present invention has been described according to different specific embodiments, those skilled in the art will recognize that the implementation of the present invention can be modified within the spirit and scope of the claims.

Claims

1. A cover opening device, used for releasing pressure on a cover of a packaging barrel, wherein the packaging barrel has a barrel mouth, and the barrel cover is arranged on the barrel mouth, and is characterized in that: The cover opening device comprises: A body, comprising a bottom wall and a side wall connected to the bottom wall, wherein the bottom wall and the side wall together enclose an inner cavity and form an opening at the top of the body, the bottom wall is provided with a through hole, and an adsorbent is arranged in the inner cavity; A cover, openably and closably disposed on the opening; A sealing ring structure, connected to the outer surface of the bottom wall, and used for sleeve connection with the barrel cover and the barrel mouth; The locking structure is connected to the outer surface of the bottom wall and is located within the range of the sealing ring structure. It is used to be adjustably fixed to the barrel cover and transmit the torque when the body rotates to the barrel cover.

2. The cover opening device according to claim 1, characterized in that: The sealing ring structure comprises: a connecting portion, which is annular and has one end connected to the outer surface of the bottom wall; and The sealing part is annular and one end of which is connected to the other end of the connecting part. The other end of the sealing part is used to be sleeved on the barrel cover and the barrel mouth. The sealing part is made of rubber.

3. The cover opening device according to claim 1, characterized in that: The main body is provided with an annular slideway on the outer surface of the bottom wall. The sealing ring structure is annular, and one end thereof is slidably matched with the slideway so that the sealing ring structure can be rotatably connected to the outer surface of the bottom wall.

4. The cover opening device according to claim 1, characterized in that: Along the axial direction of the sealing ring structure, one end of the sealing ring structure away from the body exceeds one end of the locking structure away from the body.

5. The cover opening device according to claim 1, characterized in that: The barrel cover is made of metal, and the locking structure is a magnetic structure, which is used for magnetic fixation with the barrel cover.

6. The cover opening device according to claim 1, characterized in that: The bottom wall is provided with at least two through holes.

7. The cover opening device according to claim 1, characterized in that: The material of the adsorbent is a regenerable adsorption material.

8. The cover opening device according to claim 1, characterized in that: The cover opening device also includes: The filter membrane is arranged on the inner surface of the bottom wall.

9. The cover opening device according to claim 1, characterized in that: The cover opening device also includes a handle connected to the outer surface of the side wall.

10. The cover opening device according to claim 1, characterized in that: The cover is threadably matched with the body; and / or The body is made of transparent material; and / or The sealing cover is made of transparent material.

Images