Pressure relief and exhaust assembly, bottle cap with pressure relief and exhaust assembly, container with bottle cap and container with bottle cap

Abstract

The utility model discloses a pressure relief and exhaust assembly, a bottle cap with the pressure relief and exhaust assembly and a container with the bottle cap, the pressure relief and exhaust assembly comprises an outer sleeve seat, a protective cover and an inner sleeve ring, a plurality of clamping seats are arranged on the inner wall of the outer sleeve seat at intervals, and each clamping seat comprises a stand column located on the inner wall of the outer sleeve seat and a platform located at the bottom end of the stand column. A bottom cover is arranged at the bottom end of the outer sleeve seat, the outer diameter of the bottom cover is smaller than the inner diameter of the outer sleeve seat, and a plurality of exhaust grooves arranged at intervals are formed between the bottom cover and the outer sleeve seat in a surrounding mode. An inner lantern ring is clamped on the clamping seat and comprises an exhaust ring and a connecting ring, a supporting frame is arranged in the exhaust ring, a breathable film is arranged on the supporting frame, a protective cover is arranged at the bottom end of the supporting frame, a through hole is formed in the center of the protective cover, and the protective cover is located on the platform. According to the pressure relief and exhaust assembly, due to the fact that the positions of the clamping base and the exhaust groove are fixed, the exhaust groove cannot be shielded, smooth exhaust and liquid drainage are guaranteed, and the service life of the pressure relief and exhaust assembly is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief and venting components, specifically to a pressure relief and venting assembly and a bottle cap including the pressure relief and venting assembly. Background Technology

[0002] When liquids are stored in containers, changes in ambient temperature and air pressure can cause liquid vaporization and the volatilization of gases dissolved in the liquid. If these gases are not expelled from the container in time, the internal pressure will rise, potentially leading to the container bursting.

[0003] To address this issue, a common method is to install vents on the container, allowing internal gases to escape and protecting the container. However, during transport or storage, collisions can cause liquid to spill from the vents, resulting in waste. Furthermore, the vents allow dust and other environmental contaminants to enter the container, potentially contaminating the stored liquid.

[0004] Authorization announcement number CN204922910U discloses a waterproof and breathable cap, comprising a cylindrical rubber shell with one open side and a cylindrical sealing body that can be placed inside the shell. The sealing body has through holes penetrating its two ends, and a breathable membrane is fixed to the upper end face of the sealing body. Four equidistant blocks are arranged in a ring on the outer surface of the sealing body, with the thickness of the blocks gradually decreasing from top to bottom to form a slope. Three protrusions are provided around the bottom surface of the inner side of the shell. This breathable cap is installed at the rear end of a car headlight, mainly used to replace the gas inside the headlight to maintain the pressure balance inside the headlight. The breathable membrane used is made of expanded polyvinyl chloride, so it only allows air to pass through, preventing moisture or other impurities from passing through, thus achieving good gas exchange and sealing, preventing headlight fogging during driving, and ensuring safe driving.

[0005] However, the aforementioned waterproof and breathable caps are specifically designed for automotive headlights and cannot be used for container caps.

[0006] Authorization announcement number CN212314376U discloses a liquid-resistant bottle cap, which includes an inner ring and an outer seat. The inner ring is detachably fixed inside the outer seat. The inner ring includes a vent ring, a vent ring connecting ring, a waterproof and breathable membrane, and retaining strips. The outer diameter of the vent ring connecting ring is smaller than the outer diameter of the vent ring and is integrally set on the upper side of the vent ring. Multiple retaining strips are arranged circumferentially on the outer side of the vent ring, and the lower end of the retaining strips protrudes from the lower surface of the vent ring. The waterproof and breathable membrane is fixedly connected to the vent ring. Multiple drainage holes are arranged circumferentially at intervals on the bottom of the outer seat. In use, gas in the liquid storage container enters the interior of the outer seat through the drainage holes on the outer seat, then passes through the waterproof and breathable membrane into the inner ring, and then enters the threaded cap connecting ring and is discharged outside the liquid storage container through the vent holes. Gas in the liquid storage container can also enter the interior of the outer seat through the gaps between the retaining strips, and then enter the inner ring through the gap between the retaining strips and the bottom of the outer seat, and then enter the threaded cap connecting ring and is discharged outside the liquid storage container through the vent holes. Liquid splashed into the outer casing enters through the gaps between the retaining strips and is discharged through the drain hole, returning to the liquid storage container without causing spillage. Furthermore, the waterproof and breathable membrane prevents dust and impurities from entering the liquid storage container.

[0007] The aforementioned anti-liquid corrosion bottle caps can prevent liquid spillage and relieve pressure and vent gas for a certain period of time, but their service life is relatively short. After prolonged use, the bottle caps may deform or even crack, requiring frequent replacement, which increases usage costs and causes inconvenience to manufacturers. Utility Model Content

[0008] In view of the above-mentioned defects of the prior art, the present invention provides a pressure relief and venting assembly, in which a card holder is disposed on an outer sleeve and a venting groove is disposed between the card holders. When the outer sleeve is connected to the inner sleeve ring, the venting groove will not be blocked, thus ensuring smooth venting of the liquid storage container. To this end, the present invention also provides a bottle cap.

[0009] A first aspect of this utility model provides a pressure relief and exhaust assembly, including an outer casing, a protective cover, and an inner ring.

[0010] The outer casing is a hollow cavity. A plurality of card holders are spaced apart on the inner wall of the outer casing. Each card holder includes a column located on the inner wall of the outer casing and a platform located at the bottom end of the column. A bottom cover is provided at the bottom end of the outer casing.

[0011] The bottom cover is provided with a plurality of venting grooves spaced apart in the circumferential direction, and the venting grooves are located between two card seats; or the outer diameter of the bottom cover is smaller than the inner diameter of the outer cover, and a plurality of venting grooves are provided between the bottom cover and the outer cover.

[0012] The card holder is fitted with an inner sleeve ring, which includes an exhaust ring. A support frame is provided inside the exhaust ring, and a breathable membrane is provided on the support frame. A protective cover is provided at the bottom of the support frame, and a through hole is provided in the center of the protective cover. The protective cover is located on the platform.

[0013] There are two ways to set up the venting channels: The first way is to set a bottom cover at the bottom of the outer seat, which covers the bottom of the outer seat and opens the venting channels on the bottom cover, so that the venting channels are located between two brackets and the brackets do not block the venting channels, ensuring normal venting and drainage; The second way is to set a bottom cover at the bottom of the outer seat, but the outer diameter of the bottom cover is smaller than the inner diameter of the outer seat. In this case, the bottom cover is fixedly connected to the outer seat through the bottom of the platform, and multiple venting channels are formed between the base and the outer seat.

[0014] The above technical solution involves placing the card holder on the outer seat. After the inner ring and the outer seat are connected by the card holder's snap-fit, venting is achieved through venting grooves spaced between the card holders. Because the card holder is fixed to the outer seat, the inner ring will not obstruct the venting grooves regardless of its rotation after the connection, thus avoiding problems such as poor venting and liquid drainage, which could lead to bottle cap deformation or cracking, as well as liquid accumulation.

[0015] A protective cover is installed at the bottom of the support frame of the inner ring. The protective cover has a through hole. When liquid enters the outer seat through the venting groove, the liquid will not splash into the breathable membrane due to the function of the protective cover, thus protecting the breathable membrane.

[0016] During use, gas enters the outer casing through the exhaust groove. Because the platform has a certain height, there is a certain space between the protective cover and the bottom cover on the platform. The gas entering the outer casing enters the through hole of the protective cover through this space, and then enters the inner ring through the through hole of the protective cover and is discharged from the breathable membrane, thus realizing exhaust.

[0017] In a preferred embodiment, the bottom cover protrudes upward at the end near the protective cover.

[0018] The bottom cover has an upward protrusion at the end near the protective cover, which makes the bottom cover have a sloping structure that is high in the middle and low on both sides. When liquid enters between the protective cover and the bottom cover through the venting channel, the liquid flows out quickly through the sloping structure, avoiding liquid accumulation, reducing the risk of liquid splashing into the breathable membrane, and effectively protecting the breathable membrane.

[0019] In a more preferred embodiment, the end of the bottom cover near the protective cover is conical or mountain-shaped.

[0020] The end of the bottom cover near the protective cover can be set as a cone or a mountain peak shape. Of course, the shape of the bottom cover is not limited to this. Any similar structure that achieves a high middle and low ends can be used in this application.

[0021] The breathable membrane is made of expanded polytetrafluoroethylene.

[0022] The inner ring and outer seat are made of rigid plastic, and can be made of any of ABS, PE, PP, or PVC. However, the materials for the inner ring and outer seat are not limited to these; other metal or non-metal materials such as stainless steel and glass can also be selected as needed.

[0023] In a preferred embodiment, the top of the column is provided with an extended end that extends toward the center.

[0024] In a preferred embodiment, the inner collar is engaged between the protruding end and the platform.

[0025] An extension end extending towards the center is provided at the top of the column, and the inner collar is locked between the extension end and the platform, which increases the firmness of the connection between the inner collar and the outer seat.

[0026] The outer diameter of the inner collar is larger than the inner diameter of the column. By securing the inner collar within the space enclosed by multiple columns, the inner collar can be connected to the outer sleeve. Since the inner collar is positioned above the outer sleeve during normal use, to prevent the outer sleeve from shifting downwards under gravity over time, causing misalignment or even the inner collar falling out of the outer sleeve, an extension is provided at the top of the column. This extension limits the movement of the inner collar, preventing the outer sleeve from slipping and increasing the stability of the connection between the inner collar and the outer sleeve.

[0027] In a preferred embodiment, the outer sleeve and the card slot are integrally formed.

[0028] The outer casing and the mounting bracket are molded as a single piece, saving installation time. Of course, the outer casing and the mounting bracket can also be connected in a detachable manner, such as by bolts and screws.

[0029] In a preferred embodiment, the column is flush with the bottom of the platform.

[0030] A platform is set at the bottom of the column, with the bottom of the column and the bottom of the platform flush. The bottom cover is set on the plane formed by the bottom of the column and the bottom of the platform.

[0031] In another preferred embodiment, the bottom end of the column is lower than the bottom end of the platform, and the bottom cover is secured below the platform.

[0032] A platform is set at the bottom of the column, with the bottom of the column lower than the bottom of the platform. The platform divides the column into two sections, the lower section, which is used to set the base and is secured to the bottom of the platform. The upper section is used to place the protective cover and inner ring.

[0033] Because the platform has a certain thickness, there is a certain space between the protective cover and the bottom cover. When the gas enters this space from the exhaust channel, it enters the breathable membrane through the center hole of the protective cover and is then discharged from the bottle cap, thus achieving the breathable effect.

[0034] In a preferred embodiment, a connecting ring is provided at the top of the exhaust ring.

[0035] When the pressure relief and exhaust assembly of this application needs to be connected to a solid carrier in the environment, such as when it is used in streetlights, the exhaust ring needs to be installed in the lamp cover of the streetlight. At this time, the connection is achieved through the connecting ring set at the top of the exhaust ring. The connection here can be a press-fit connection or a threaded connection.

[0036] In a second aspect, this utility model provides a bottle cap, comprising a cap body with vent holes and the aforementioned pressure relief and venting assembly, wherein the venting ring of the pressure relief and venting assembly is connected in communication with the vent holes of the cap body.

[0037] The aforementioned pressure relief and venting assembly is used in a bottle cap. The bottle cap has a vent hole, and the pressure relief and venting assembly is installed at the position of the vent hole. The gas discharged through the pressure relief and venting assembly is discharged through the vent hole.

[0038] In a preferred embodiment, a cover connecting ring is provided at the bottom end of the cover, and the cover connecting ring is connected to the connecting ring of the pressure relief and exhaust assembly.

[0039] The bottle cap consists of a cap body and a cap body connecting ring at the bottom of the cap body. The cap body connecting ring connects to the connecting ring of the pressure relief and venting assembly. The connection method here is not limited; conventional methods include threaded connections and interference fit connections. After the pressure relief and venting assembly is connected to the bottle cap, the bottle cap sits on top of the liquid storage container. The gas produced by the vaporization of the liquid in the storage solution passes through the pressure relief and venting assembly, enters the vent hole of the bottle cap, and then enters the atmosphere, achieving the venting effect.

[0040] A third aspect of this utility model provides a container having an exhaust port, and the aforementioned pressure relief and exhaust assembly is installed at the exhaust port.

[0041] The container here can be the lens cover of a car headlight. The pressure relief and exhaust assembly is placed inside the lens cover to ensure smooth exhaust and prevent the streetlights from fogging up and affecting visibility.

[0042] A fourth aspect of this utility model provides a container, the container being covered with the aforementioned bottle cap.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] (1) The pressure relief and exhaust assembly of this utility model has a retainer on the outer seat and an exhaust groove between the retainers. After the outer seat and the inner ring are connected by the retainer, no matter how the inner ring rotates, the position of the retainer and the exhaust groove is fixed, so the exhaust groove will not be blocked, ensuring smooth exhaust and avoiding gas accumulation that could cause deformation or cracking of the breathable membrane, thus extending the service life of the pressure relief and exhaust assembly. At the same time, because the exhaust groove is not blocked, the liquid entering through the exhaust groove will be discharged quickly, ensuring smooth drainage and preventing liquid from accumulating in the pressure relief and exhaust assembly.

[0045] (2) The pressure relief and exhaust assembly of this utility model has a protective cover at the bottom of the support frame of the inner ring. The protective cover is located at the bottom of the breathable membrane. After the solution in the liquid storage container splashes into the outer seat from the exhaust groove, the solution is difficult to enter the space where the breathable membrane is located due to the obstruction of the protective cover, so as to avoid the solution splashing into the breathable membrane and reducing the function of the breathable membrane.

[0046] (3) The pressure relief and exhaust assembly of this utility model has excellent effects in preventing liquid overflow and relieving pressure and exhausting air, and extends the service life of traditional pressure relief and exhaust assemblies, expands the scope of application, and is easy to promote widely.

[0047] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0048] Figure 1 This is a three-dimensional structural diagram of a liquid corrosion resistant bottle cap in the existing technology;

[0049] Figure 2 This is a schematic diagram of the combined structure of the inner ring and outer seat of a liquid corrosion resistant bottle cap in the prior art;

[0050] Figure 3 This is a schematic diagram of the assembly structure of the pressure relief and exhaust assembly of this utility model;

[0051] Figure 4 This is a cross-sectional view of the assembly structure of the pressure relief and exhaust assembly of this utility model;

[0052] Figure 5 This is a schematic diagram of the outer sleeve in the pressure relief and exhaust assembly of this utility model;

[0053] Figure 6 This is another structural schematic diagram of the outer sleeve in the pressure relief and exhaust assembly of this utility model;

[0054] Figure 7 This is a schematic diagram of the inner collar structure in the pressure relief and exhaust assembly of this utility model;

[0055] Figure 8This is a schematic diagram of the structure of the protective cover in the pressure relief and exhaust assembly of this utility model;

[0056] Figure 9 This is a diagram showing the connection between the pressure relief and exhaust assembly and the cover of this utility model.

[0057] Among them: 1-venting ring, 2-venting ring connecting ring, 3-waterproof and breathable membrane, 4-stripping, 5-convex ring, 6-net frame, 7-outer sleeve seat, 8-drain hole, 9-inner sleeve ring, 10-venting groove, 11-stripping seat, 12-platform, 13-protective cover, 14-extended end, 15-column, 16-connecting ring, 17-bottom cover, 19-support frame, 20-cover body. Detailed Implementation

[0058] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the present utility model is further described below in conjunction with specific illustrations. However, this utility model is not limited to the embodiments described below.

[0059] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0060] When liquids are stored in sealed containers, changes in ambient temperature or air pressure can cause the liquid to vaporize and the dissolved gases to evaporate. It is necessary to release the gases from the containers in a timely manner; otherwise, if the gases accumulate to a certain extent, there is a risk of the containers bursting.

[0061] Authorization notice number CN212314376U discloses a liquid corrosion resistant bottle cap, such as Figure 1 , 2 As shown, the anti-corrosion bottle cap includes an inner ring and an outer seat 7. The inner ring is detachably fixed to the outer seat 7. The inner ring includes a vent ring 1, a vent ring connecting ring 2, a waterproof and breathable membrane 3, and a retaining strip 4. A mesh frame 6 is integrally provided on the inner side of the junction of the vent ring 1 and the vent ring connecting ring. The waterproof and breathable membrane 3 is attached to the lower side of the mesh frame 6 and covers the holes of the mesh frame 6. The bottom of the outer seat 7 has a plurality of drainage holes 8 spaced apart circumferentially. The anti-corrosion bottle cap is placed on the liquid storage container. When the liquid storage container is transported, the gas generated in the liquid storage container enters the interior of the outer seat 7 through the drainage holes 8 on the outer seat 7, then passes through the waterproof and breathable membrane 3 into the inner ring, and is then discharged outside the liquid storage container.

[0062] The aforementioned liquid corrosion resistant bottle caps are widely used in the market. However, after a period of use, the breathability of these caps decreases, rendering them unusable and requiring replacement. Frequent replacement of these caps increases usage costs and causes inconvenience to users.

[0063] The inventors of this application, through repeated research on the anti-corrosion bottle cap, discovered that the change in the relative position of the retaining strip 4 and the drain hole 8 during installation or use is a key factor affecting its ventilation function. The retaining strip 4 of the aforementioned anti-corrosion bottle cap is located on the outside of the inner ring, and the drain hole 8 is located at the bottom circumferential position of the outer seat 7. Ideally, the retaining strip 4 and the drain hole 8 are completely offset, ensuring normal drainage and ventilation of the drain hole 8. However, on the one hand, because the installation of the inner ring and the outer seat 7 is mechanized and lacks precision, when the inner ring and the outer seat 7 are snapped together, the retaining strip 4 may partially cover the drain hole 8 on the outer seat 7, resulting in obstructed venting. On the other hand, during use, the inner ring may rotate under external force, causing the retaining strip 4 on the inner ring to overlap with the drain hole 8 to a certain extent, thus hindering normal drainage of the drain hole 8.

[0064] In addition, liquid splashing from the storage container and covering the breathable membrane is another key factor affecting its breathability. The inner ring is a hollow cavity, including an exhaust ring 1 and an exhaust ring connecting ring 2. A mesh frame 6 is integrally set on the inner side of the junction of the exhaust ring 1 and the exhaust ring connecting ring 2. The waterproof and breathable membrane 3 is attached to the lower side of the mesh frame 6 and covers the holes of the mesh frame 6. After the inner ring is connected to the outer seat 7, the drain hole 8 on the outer seat 7 and the waterproof and breathable membrane 3 on the inner ring are in a through state with no obstruction between them. When liquid in the storage container splashes out through the drain hole 8, it will splash into the breathable membrane that is directly opposite the drain hole 8. The liquid covers the breathable membrane, further reducing the function of the breathable membrane.

[0065] To solve the above problems, the inventors of this application ingeniously set a retainer 11 on the outer casing 7 and an exhaust groove 10 between each pair of retainers 11. After the outer casing 7 is snapped together with the inner sleeve 9, no matter how the inner sleeve 9 rotates, the positions of the retainers 11 and the exhaust grooves 10 are fixed, preventing the exhaust grooves 10 from being blocked. In addition, a protective cover 13 with a central opening is placed on the platform 12 of the retainer 11. When liquid in the storage container splashes into the exhaust groove 10, the liquid returns to the storage container due to the protection of the protective cover 13, reducing the risk of liquid splashing into the breathable membrane. This keeps the breathable membrane in good working order and extends its service life.

[0066] Example 1

[0067] A pressure relief and venting assembly, such as Figure 3 ,4 Components 5, 6, 7, and 8 include an outer sleeve 7, a protective cover 13, and an inner ring 9. The inner ring 9, protective cover 13, and outer sleeve 7 are made of rigid plastic, and can be any of ABS, PE, PP, or PVC. The outer sleeve 7 is a hollow cavity. A plurality of retaining seats 11 are spaced apart on the inner wall of the outer sleeve 7. Each retaining seat 11 includes a post 15 located on the inner wall of the outer sleeve 7 and a platform 12 located at the bottom of the post 15. A protruding end 14 is provided at the top of the post 15, extending towards the center of the cavity. The inner ring 9 is secured between the protruding end 14 and the platform 12. The protruding end 14 increases the firmness of the connection between the inner ring 9 and the outer sleeve 7, preventing the inner ring 9 from slipping out of the outer sleeve 7 during use.

[0068] The bottom of the outer casing 7 is provided with a bottom cover 17, and a plurality of vent grooves 10 are spaced apart on the circumference of the bottom cover 17, with the vent grooves 10 located between pairs of retaining seats 11. "Circumferential" refers to the direction of the outer edge of the bottom cover 17. Since the bottom cover 17 is usually circular, "circumferential" here refers to the circumferential direction. When the outer diameter of the bottom cover 17 is smaller than the inner diameter of the outer casing 7, the bottom cover 17 is fixedly connected to the outer casing 7 through the bottom end of the platform 12, and a plurality of spaced vent grooves 10 are provided between the bottom cover 17 and the outer casing 7. Although the bottom cover 17 has the above two different configurations, the positions of the vent grooves 10 and the retaining seats 11 are relatively fixed and will not interfere with each other.

[0069] Because the inner wall of the outer sleeve 7 is provided with a retainer 11, which separates the venting grooves 10, the retainer 11 and the venting grooves 10 are alternately arranged. The retainer 11 is placed on the outer sleeve 7, and after the inner sleeve 9 and the outer sleeve 7 are connected by the retainer 11, venting and drainage are achieved through the venting grooves 10 spaced apart by the retainers 11. Because the retainer 11 is fixed to the outer sleeve 7, after the inner sleeve 9 is connected to the outer sleeve 7, no matter how the inner sleeve 9 rotates, it will not obstruct the venting grooves 10, thus avoiding problems such as bottle cap deformation or cracking caused by poor venting and drainage.

[0070] An inner ring 9 is fitted onto the mounting base 11. The inner ring 9 includes an exhaust ring 1 and a connecting ring 16 located at the top of the exhaust ring 1. A support frame 19 is installed inside the exhaust ring 1, and a breathable membrane is installed on the support frame 19. The breathable membrane is made of expanded polytetrafluoroethylene (PTFE). Gas can be discharged through the breathable membrane, while dust and other impurities in the external environment cannot enter, ensuring breathability without contaminating the solution in the storage container. A protective cover 13 is installed at the bottom of the support frame 19, with a through hole in the center. The protective cover 13 is located on the platform 12. The protective cover 13, with its through hole, prevents liquid from splashing into the breathable membrane when it enters the outer mounting base 7 through the exhaust groove 10, thus protecting the breathable membrane.

[0071] In use, the gas in the storage container enters the outer sleeve 7 through the venting groove 10. Because the platform 12 has a certain height, there is a certain space between the protective cover 13 and the bottom cover 17 located on the platform 12. The gas entering the outer sleeve 7 enters the through hole of the protective cover 13 through this space, and the gas enters the inner sleeve ring 9 through the through hole of the protective cover 13 and is discharged from the venting membrane, thereby realizing the venting.

[0072] The connecting ring 16 is provided to connect the pressure relief and venting assembly to other components. For example, when connecting the connecting ring 16 to a bottle cap, a cap connecting ring is provided at the corresponding position on the bottom of the bottle cap. The connecting ring 16 and the cap connecting ring are connected by threads or an interference fit. Of course, the connecting ring 16 is not a necessary component. When the venting ring 1 of the pressure relief and venting assembly is connected to the cap or other components in a specific application scenario through other fixed connections, the connecting ring 16 can be omitted.

[0073] like Figure 4 The bottom cover 17 protrudes upward at the end near the protective cover 13, and this end is formed in a conical or mountain-shaped manner. This upward protrusion at the end of the bottom cover 17 near the protective cover 13 creates a sloping structure with a higher center and lower sides. When liquid from the storage container enters between the protective cover 13 and the bottom cover 17 via the venting channel 10, the liquid flows out quickly through the sloping structure, preventing liquid accumulation, reducing the risk of liquid splashing into the breathable membrane, and effectively protecting the breathable membrane.

[0074] The outer casing 7 and the card holder 11 can be integrally formed or connected in a detachable manner, such as by bolts and screws.

[0075] When the bottom cover 17 is fixedly connected to the outer sleeve 7 via the bottom end of the platform 12, the bottom end of the column 15 can be flush with the bottom end of the platform 12, or the bottom end of the column 15 can be lower than the bottom end of the platform 12. When the bottom end of the column 15 is flush with the bottom end of the platform 12, the bottom cover 17 is set on the plane formed by the bottom ends of the column 15 and the platform 12; when the bottom end of the column 15 is lower than the bottom end of the platform 12, the platform 12 divides the column 15 into upper and lower sections. The lower section is used to set the bottom cover 17, which is then secured below the platform 12; the upper section is used to place the protective cover 13 and the inner sleeve 9.

[0076] Because the platform 12 has a certain thickness, regardless of how the bottom cover 17 is set, there is always a certain space between the protective cover 13 and the bottom cover 17. After the gas released from the liquid storage container enters the space through the exhaust groove 10, it enters the breathable membrane through the central hole of the protective cover 13 and is discharged from the bottle cap, thus achieving the breathable effect.

[0077] Example 2

[0078] This utility model provides a bottle cap, such as Figure 9 It includes a cover 20, a cover connecting ring disposed at the bottom end of the cover 20, and the aforementioned pressure relief and exhaust assembly. The cover connecting ring is connected to the connecting ring 16 of the pressure relief and exhaust assembly.

[0079] After the pressure relief and venting assembly is connected to the cap, the cap is placed on top of the liquid storage container. The gas produced by the vaporization of the liquid in the storage solution passes through the pressure relief and venting assembly, enters the vent of the cap, and then enters the atmosphere, thus achieving the venting effect.

[0080] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A pressure relief and exhaust assembly, characterized in that, Includes outer casing, protective cover, and inner ring. The outer casing is a hollow cavity. A plurality of card holders are spaced apart on the inner wall of the outer casing. Each card holder includes a column located on the inner wall of the outer casing and a platform located at the bottom end of the column. A bottom cover is provided at the bottom end of the outer casing. The bottom cover is provided with a plurality of venting grooves spaced apart in the circumferential direction, and the venting grooves are located between two card seats; or the outer diameter of the bottom cover is smaller than the inner diameter of the outer cover, and a plurality of venting grooves are provided between the bottom cover and the outer cover. The card holder is fitted with an inner sleeve ring, which includes an exhaust ring. A support frame is provided inside the exhaust ring, and a breathable membrane is provided on the support frame. A protective cover is provided at the bottom of the support frame, and a through hole is provided in the center of the protective cover. The protective cover is located on the platform.

2. The pressure relief and exhaust assembly according to claim 1, characterized in that, The bottom cover protrudes upwards at the end near the protective cover.

3. The pressure relief and venting assembly according to claim 2, characterized in that, The bottom cover is tapered at the end near the protective cover.

4. The pressure relief and venting assembly according to claim 1, characterized in that, The top of the column is provided with an extension end, which extends towards the center.

5. The pressure relief and venting assembly according to claim 4, characterized in that, The inner collar is secured between the protruding end and the platform.

6. The pressure relief and venting assembly according to claim 1, characterized in that, The outer casing and the card slot are integrally formed.

7. The pressure relief and venting assembly according to claim 1, characterized in that, The column is flush with the bottom of the platform.

8. The pressure relief and venting assembly according to claim 1, characterized in that, The bottom of the column is lower than the bottom of the platform, and the bottom cover is secured below the platform.

9. The pressure relief and venting assembly according to any one of claims 1-8, characterized in that, A connecting ring is provided at the top of the exhaust ring.

10. A bottle cap, comprising a cap body having vent holes, characterized in that, It also includes the pressure relief and venting assembly according to any one of claims 1-9, wherein the venting ring of the pressure relief and venting assembly is connected in communication with the vent hole of the cover.

11. The bottle cap according to claim 10, characterized in that, The bottom end of the cover is provided with a cover connecting ring, which is connected to the connecting ring of the pressure relief and exhaust assembly.

12. A container with a pressure relief and venting assembly, characterized in that, The container is provided with an exhaust port, and the pressure relief and exhaust assembly according to any one of claims 1-9 is installed at the exhaust port.

13. A container with a cap, characterized in that, The container is covered with the cap as described in claim 10 or 11.

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