Sealing cover adaptive to container and container system

Abstract

The utility model provides a sealing cover adapted to the container and a container system, the container comprises an opening and an accessory installed in the opening, the accessory is provided with a through pipeline channel, the sealing cover comprises a cover body and a breakable sealing membrane, when the cover body is connected with the opening, the breakable sealing membrane is connected with the opening through the pipeline channel, and the breakable sealing membrane is connected with the opening through the pipeline channel. The breakable sealing membrane is located on the inner side of the cover body and covers the top end of the accessory, and the breakable sealing membrane is connected with the top end of the accessory in a sealed mode so that the breakable sealing membrane can seal the pipeline channel; the breakable sealing membrane comprises a tolerance layer and a buffer layer, the tolerance layer is arranged towards the pipeline channel, and the buffer layer is located on the side, away from the pipeline channel, of the tolerance layer. The combination of the buffer layer and the tolerant layer can resist the influence of the combination of liquid impact, corrosion and chemical properties on the sealing connection of the breakable sealing diaphragm and the top end of the accessory, and ensures the effective sealing connection of the breakable sealing diaphragm and the top end of the accessory.

Description

Technical Field

[0001] The utility model relates to the technical field of sealed containers, in particular to a sealing cover adapted to a container and a container system. Background Art

[0002] Containers are mostly used for storing and transporting chemical products and industrial liquids. Since most of the liquids contained in the containers have a certain fluidity, during transportation or handling, the liquid will shake inside the container, and thus it is easy to leak from the opening of the container. On the one hand, the price of some liquids is relatively expensive, and the leakage of the liquid may cause relatively large economic losses. On the other hand, some liquids have certain toxicity, corrosiveness or can react violently with other products. When the liquid leaks, it will pollute the environment and even endanger personal safety. Therefore, existing containers for storing and transporting such liquids usually need to ensure the tightness of their openings to avoid liquid leakage and prevent external pollutants from entering the container.

[0003] Existing containers usually install a sealing cover adapted to the opening to ensure the tightness of the container opening, and cooperate with an external device to draw and distribute the liquid without unscrewing the sealing cover during use. For example, in a container and dispensing system for liquid chemicals disclosed in the invention patent with the publication number US5102010A, the patent specification and drawings specifically disclose that the container mainly includes five components: an inner bag 12, a fitting 14, an outer bottle 16, a retainer 18 and a lid 20. The lid 20 also has an internal thread for engaging the external thread of the mouth 36 of the outer bottle 16. The lid 20 is designed to be screwed onto the outer bottle 16 with a predetermined torque to ensure the liquid and air. Among them, the mouth 22 of the fitting 14 is closed by a rupturable sealing film 60. In the embodiments shown in the patent Figure 1 、 3 and 6, the lid 20 is a pressure-sensitive adhesive film 62 with a pull tab 64. The film 62 covers the central main port 66 of the cap 20 and the vent port 68. Before dispensing the liquid in the container 10, the film 62 remains in place to provide a backup seal for the container 10. When the liquid in the container 10 is to be dispensed, at this time, the film 62 is torn by grasping the pull tab 64 and pulling it upward, which exposes the main port 66 and the vent port 68, but the rupturable sealing film 60 is still in place to provide a seal until a suitable dispensing device is attached to the lid 20. The vent port 68 and the vent holes 54A and 54B provide a path for air to enter the interior of the container 10 between the walls of the bag 12 and the bottle 16, which allows the air pressure to help fold the inner bag 12 to squeeze out the liquid when dispensing the liquid.

[0004] In the solution of the above patent, the mouth 22 of the accessory 14 is mainly closed by the rupturable sealing film 60, so that the accessory 14 and the mouth 22 form a sealed connection, thereby achieving the sealing of the liquid in the inner bag 12 without leakage. However, during transportation, the liquid stored in the container may reach the rupturable sealing film 60 through the channel of the accessory 14 due to shaking. On the one hand, a certain impact force will be generated on the rupturable sealing film 60, and when the rupturable sealing film 60 is subjected to this impact force for a long time, the connection strength between the rupturable sealing film 60 and the accessory 14 may be reduced, thereby affecting the sealing effect between the rupturable sealing film 60 and the accessory 14; on the other hand, the liquid stored in the inner bag 12 is generally corrosive and chemical. After the end surface of the rupturable sealing film 60 facing the channel of the accessory 14 contacts such liquid, it is easily affected by corrosion and chemistry, thereby affecting the sealing performance between the rupturable sealing film 60 and the accessory 14.

[0005] Therefore, the liquid contacts and impacts the rupturable sealing film. The combined effect of the above two aspects will affect the sealing connection between the rupturable sealing film and the accessories. It is urgent for those skilled in the art to provide a sealing cover and container system suitable for the container. Contents of utility model

[0006] The technical problem to be solved by the utility model is to overcome the defects in the prior art, thereby providing a sealing cover and a container system suitable for a container.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A sealing cover adapted for a container, the container comprising an opening and an accessory installed in the opening, the accessory having a through pipeline passage, the sealing cover comprising a cover body and a rupturable sealing membrane, when the cover body is connected to the opening, the rupturable sealing membrane is located inside the cover body and covers the top of the accessory, the rupturable sealing membrane is sealedly connected to the top of the accessory so that the rupturable sealing membrane seals the pipeline passage; the rupturable sealing membrane comprises a resistant layer and a buffer layer, the resistant layer is arranged toward the pipeline passage, and the buffer layer is located on the side of the resistant layer away from the pipeline passage.

[0009] Through the above technical solution, the breakable sealing diaphragm forms a sealed connection with the top end of the fitting, which can achieve the sealing of the pipeline channel of the fitting and prevent the liquid stored in the container from leaking through the pipeline channel. The breakable sealing diaphragm includes a resistant layer and a buffer layer. Among them, the resistant layer can resist the corrosiveness and chemical properties of the liquid, and the buffer layer can resist impact and has a buffering function. The resistant layer faces the pipeline channel. When the corrosive and chemical liquid in the container reaches the position of the breakable sealing diaphragm through the pipeline channel due to transportation or other reasons and impacts the breakable sealing diaphragm, the liquid first contacts the resistant layer, and will not have a corrosive and chemical impact on the buffer layer, avoiding the influence of the corrosiveness and chemical properties of the liquid on the breakable sealing diaphragm after contact with the liquid. Furthermore, it can to a certain extent avoid the influence of the corrosiveness and chemical properties of the liquid on the sealed connection between the breakable sealing diaphragm and the fitting, thereby preventing the sealing failure between the breakable sealing diaphragm and the top end of the fitting; at the same time, since the buffer layer is located on the side of the resistant layer away from the pipeline channel and can support the resistant layer when the resistant layer is impacted by the liquid, it can effectively absorb and disperse the liquid impact force received by the resistant layer, avoiding the liquid impact force from affecting the connection strength (welding strength or adhesion strength or pressing strength) of the sealed connection between the breakable sealing diaphragm and the fitting, and further avoiding the disconnection between the breakable sealing diaphragm and the top end of the fitting, resulting in the leakage of the liquid in the pipeline channel; therefore, the combination of the resistant layer and the buffer layer can, when facing the liquid from the pipeline channel, both avoid the influence of the corrosiveness and chemical properties of the liquid on the sealed connection between the sealing diaphragm and the top end of the fitting, and resist and disperse the liquid impact force, ensuring that the sealed connection between the sealing diaphragm and the top end of the fitting has sufficient strength, so that the sealing diaphragm and the top end of the fitting are effectively sealed and connected.

[0010] Preferably, the cover body includes a first extrusion ring protruding towards the buffer layer, and the first extrusion ring is used to extrude the buffer layer and the resistant layer so that the resistant layer abuts and seals against the top end of the fitting.

[0011] Through the above technical solution, when the cover body is connected to the opening of the container, the first extrusion ring first extrudes the buffer layer and then transmits the force to the tolerance layer. The first extrusion ring can simultaneously apply sufficient extrusion force to the buffer layer and the tolerance layer to ensure the abutting seal between the tolerance layer and the top end of the fitting, that is, a sealed connection surface is formed between the end face of the tolerance layer facing the fitting and the top end of the fitting. Since the tolerance layer will not be overly damaged due to the corrosiveness and chemical properties of the liquid, the sealing effect of the sealed connection surface is not affected by the corrosiveness and chemical properties of the liquid, and thus a good sealing effect can be maintained for a long time. The tolerance layer and the top end of the fitting are abutted and sealed due to the first extrusion ring. In addition to the buffer layer being able to buffer the liquid impact from the tolerance layer, the first extrusion ring can also cooperate with the buffer layer to buffer the liquid impact from the tolerance layer. The tolerance layer can prevent the liquid in the pipeline channel from contacting the buffer layer, avoiding the corrosiveness and chemical properties of the liquid on the buffer layer, ensuring the buffering effect and deformation performance of the buffer layer. At the same time, the buffer layer can also buffer the extrusion force from the first extrusion ring to protect the tolerance layer, preventing the first extrusion ring from directly extruding the tolerance layer and causing damage to the tolerance layer. The buffer layer and the tolerance layer protect each other, ensuring the effective sealed connection of the breakable sealing diaphragm to the top end of the fitting.

[0012] Preferably, the top end of the fitting has an end face and a support ring protruding from the end face; the support ring has an inner side wall, an outer side wall, and a connection surface connecting the inner side wall and the outer side wall; the first extrusion ring extrudes the buffer layer and the tolerance layer so that the tolerance layer abuts and seals with one or more of the inner side wall, the outer side wall, the connection surface, and the end face.

[0013] Through the above technical solution, since the support ring protrudes from the end face and is configured as a stepped structure, when the first extrusion ring extrudes the buffer layer and the tolerance layer downward, the buffer layer and the tolerance layer can deform. According to the downward extrusion degree of the first extrusion ring, the tolerance layer can abut and seal with one or more of the inner side wall, the outer side wall, the connection surface, and the end face of the support ring, so that at least one sealed connection surface is formed between the tolerance layer and the top end of the fitting, and even multiple sealed connection surfaces can be formed, enhancing the sealing effect between the tolerance layer and the fitting.

[0014] Preferably, the first extrusion ring is located radially inside the support ring and is correspondingly arranged with the end face; an outer wall surface of the first extrusion ring extends outward to form a pressing section, and at least part of the pressing section is correspondingly arranged with the connection surface.

[0015] Through the above technical solution, due to the positional relationship between the first pressing ring and the support ring, the two are radially offset. When the sealing cover is connected to the opening of the container, the first pressing ring exerts a downward force on the buffer layer of the breakable sealing diaphragm. At the same time, the support ring exerts an upward force on the tolerance layer of the breakable sealing diaphragm from the lower end. Therefore, the downward force exerted by the first pressing ring on the breakable sealing diaphragm and the upward force exerted by the support ring on the breakable sealing diaphragm are also radially offset, enabling a large bending deformation to occur in the compressed area of the breakable sealing diaphragm, so that multiple sealing positions can be formed between the tolerance layer of the breakable sealing diaphragm and the top end of the fitting, increasing the sealing effect between the tolerance layer and the fitting. Combining with the downward force exerted by the pressing section on the buffer layer of the breakable sealing diaphragm, during the process of the pressing section and the first pressing ring jointly squeezing the breakable sealing diaphragm to deform, a circumferential abutting seal is formed between the tolerance layer and the upper edge position of the inner side wall of the support ring; even when the pressing section and the first pressing ring continue to push the breakable sealing diaphragm downward to deform, the tolerance layer can form an abutting seal with the end face of the fitting, increasing the multiple sealing positions and sealing area between the tolerance layer and the fitting, and further increasing the sealing effect between the two.

[0016] Preferably, a tearing groove is provided on the inner surface of the cover body radially inside the first pressing ring; a tearing portion is provided on the outer surface of the cover body. When the tearing portion is stressed, a part of the cover body can be pulled to break along the tearing groove, so that the buffer layer is exposed.

[0017] Through the above technical solution, due to the tearing groove, the thickness of the cover body is thinned and the strength is reduced at the position corresponding to the tearing groove. When it is necessary to use an external device to draw and distribute the liquid in the dispensing container, first, a force is applied through the tearing portion to break a part of the cover body from the position of the tearing groove. After the buffer layer is exposed, secondly, an external device is used to pierce the breakable sealing diaphragm, and the pipe fitting penetrates the breakable sealing diaphragm and extends to the bottom of the container to contact the liquid for drawing and distributing the liquid. The first pressing ring located radially outside the tearing groove is not affected by the local breakage of the cover body, and the first pressing ring always presses the breakable sealing diaphragm, so that the tolerance layer and the top end of the fitting are always in abutting seal, preventing the liquid remaining near the top end of the pipeline channel from leaking during the process of drawing and distributing the liquid.

[0018] Preferably, the cover body further includes a second pressing ring protruding towards the buffer layer. The second pressing ring is located radially inside the tearing groove. The second pressing ring is correspondingly arranged with the pipeline channel. The lowest position of the second pressing ring is not higher than the lowest position of the first pressing ring in the axial direction.

[0019] Through the above technical solution, in the axial direction, the lowest position of the second extrusion ring is not higher than the lowest position of the first extrusion ring. The lowest position of the second extrusion ring is closer to the sealing diaphragm than the lowest position of the first extrusion ring, and the second extrusion ring is correspondingly arranged with the through pipeline channel. When the cover body is connected to the opening of the container, the first extrusion ring squeezes the breakable sealing diaphragm towards the top surface of the fitting, so that a seal is formed between the resistant layer and the upper edge position of the inner side wall of the support ring. The second extrusion ring can squeeze the breakable sealing diaphragm into the through pipeline channel, so that the resistant layer is squeezed to the upper edge position of the inner side wall of the pipeline channel, so that the resistant layer of the breakable sealing diaphragm abuts and seals with the upper edge of the inner side wall of the pipeline channel. That is, through the mutual cooperation of the first extrusion ring and the second extrusion ring, on the one hand, in the radial direction along the fitting, at least two seals are formed between the resistant layer of the breakable sealing diaphragm and the top end of the fitting, further increasing the sealing effect; on the other hand, the breakable sealing diaphragm can generate multiple bending deformations, so as to increase the tortuosity of the sealing line formed by at least two seals between the resistant layer and the top end of the fitting. The area between at least two seals can further prevent liquid leakage, further increasing the sealing effect between the two.

[0020] Preferably, the cover body further includes a limiting protrusion protruding towards the buffer layer, and the limiting protrusion is located radially inside the second extrusion ring.

[0021] Through the above technical solution, due to the positional relationship of the first extrusion ring, the second extrusion ring and the limiting protrusion, it can be seen that the two extrusion rings squeeze the outer edge vicinity of the breakable sealing diaphragm. When a large liquid impact force acts on the area of the breakable sealing diaphragm facing the pipeline channel, the buffer layer buffers most of the liquid impact force. The buffer layer deforms and contacts the limiting protrusion located radially inside the second extrusion ring. The limiting protrusion supports the buffer layer to limit the further upward deformation of the breakable sealing diaphragm, and thus can limit the excessive deformation of the area of the breakable sealing diaphragm facing the pipeline channel, avoiding the potential risk of the sealing failure between the resistant layer and the top end of the fitting caused by insufficient extrusion sealing strength of the first extrusion ring and the second extrusion ring on the outer edge of the breakable sealing diaphragm.

[0022] Preferably, the buffer layer is set as a PE foam layer, and the resistant layer is set as a fluororesin layer; or, the buffer layer and the resistant layer are integrally connected to form the breakable sealing diaphragm; or, several notches are provided on the surface of the buffer layer facing the cover body, and each notch extends radially from the center of the buffer layer.

[0023] Through the above technical solution, the buffer layer is set as a PE foam layer, endowing the buffer layer with physical properties such as light texture, excellent elasticity, good buffering effect, strong impact resistance, good resilience, and the ability to effectively absorb and disperse external forces. When the tolerance layer is subjected to an impact force, the buffer layer can stably support the tolerance layer, preventing the tolerance layer from undergoing excessive deformation and weakening the abutting and sealing strength with the top of the fitting, so that the tolerance layer and the top of the fitting can maintain a good abutting and sealing state. At the same time, when the buffer layer is set as a PE foam layer, it also has chemical properties such as non-toxic, odorless, acid and alkali corrosion resistant, and environmentally friendly, which is convenient for the subsequent treatment of the sealing cover and will not contaminate the liquid stored in the container. The tolerance layer is set as a fluororesin layer, endowing the tolerance layer with good corrosion and chemical resistance. When the liquid stored in the container is strong acid, strong alkali, oxidant, reductant, and various organic solvents, the tolerance layer will not be damaged, thus ensuring the sealing performance between the breakable sealing diaphragm and the top of the fitting.

[0024] Furthermore, the buffer layer and the tolerance layer are made into an integral breakable sealing diaphragm by means such as bonding or welding. The buffer layer is directly attached to the end face of the tolerance layer away from the pipeline channel. When the breakable sealing diaphragm is impacted by the liquid in the pipeline channel, it can directly buffer the impact of the liquid, reducing the upward deformation amplitude of the tolerance layer and ensuring the sealing performance between the tolerance layer and the top of the fitting.

[0025] Furthermore, a number of notches are provided on the buffer layer, and multiple notches all extend radially from the center of the buffer layer, making the overall strength of the breakable sealing diaphragm weakened and easy to break. When the breakable sealing diaphragm is quickly punctured along the center of the buffer layer with an external device, it is convenient for the pipe fitting to penetrate through the buffer layer and the tolerance layer and enter the container via the pipeline channel to draw and distribute the liquid; in addition, due to the notches on the buffer layer, its buffering performance will be reduced, and the limiting protrusion can abut against the buffer layer to limit the upward deformation amplitude of the buffer layer, which can also play a role in buffering the liquid impact force.

[0026] Preferably, the inner surface of the cover body is provided with a ventilation groove for communicating with the outer space of the pipeline channel; a connecting portion is provided on the outer surface of the cover body. One end of the connecting portion is connected to the area of the cover body opposite to the ventilation groove, and the other end is connected to the tearing portion. When the tearing portion is stressed, it pulls the connecting portion, so that the connecting portion pulls a part of the cover body along the edge of the ventilation groove to tear; or, the cover body includes a downwardly protruding mounting ring, the mounting ring is disposed radially outside the first pressing ring, the breakable sealing diaphragm is accommodated inside the mounting ring, and a stop ring for preventing the breakable sealing diaphragm from falling downward is radially protruded on the inner wall of the mounting ring.

[0027] Through the above technical solution, when it is necessary to export the liquid in the container, by pulling the tearing part, not only can a part of the cover body be torn to expose the buffer layer, but also the ventilation slots can be communicated with the outside, facilitating the staff to perform a one-time tearing operation. At this time, the suction tube can penetrate through the buffer layer and extend into the bottom of the inner cavity of the container, and at the same time, it is communicated with an external inflation device through the ventilation slots for ventilation. The gas squeezes the liquid in the container into the suction tube and exports it.

[0028] Furthermore, through the mutual cooperation of the mounting ring and the stop ring, during the process of mounting the cover body on the opening, the breakable sealing diaphragm can be stably placed in the area surrounded by the mounting ring and the stop ring, which can avoid the radial offset and axial dropping of the position of the breakable sealing diaphragm during the connection of the cover body to the opening, and prevent the poor sealing effect between the breakable sealing diaphragm and the top of the fitting caused by the installation process.

[0029] The present utility model also provides a container system, which includes a container and a sealing cover threadedly connected to the opening of the container. The sealing cover is the sealing cover described in any one of the above. The bottom of the fitting is hermetically connected with a lining, the lining is placed in the inner cavity of the container, and the inside of the lining is communicated with the pipeline channel.

[0030] Through the above technical solution, in the container system, using the above-mentioned sealing cover to seal the container can ensure the sealing performance of the container and avoid the hidden danger of liquid leakage during the processes of storing, transporting, sucking and distributing the liquid in the container.

[0031] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0032] 1. The breakable sealing diaphragm forms a sealed connection with the top of the fitting, which can achieve the sealing of the pipeline channel of the fitting, avoid the leakage of the liquid stored in the container from the pipeline channel. The combination of the resistant layer and the buffer layer can, when facing the liquid from the pipeline channel, not only avoid the influence of the corrosiveness and chemical properties of the liquid on the sealed connection between the sealing diaphragm and the top of the fitting, but also resist and disperse the impact force of the liquid, ensuring that the sealed connection between the sealing diaphragm and the top of the fitting has sufficient strength, so that the sealed connection between the sealing diaphragm and the top of the fitting is effective.

[0033] 2. The first extrusion ring first extrudes the buffer layer and then transmits the force to the resistant layer. The first extrusion ring can simultaneously apply sufficient extrusion force to both the buffer layer and the resistant layer to ensure the abutting seal between the resistant layer and the top end of the fitting, that is, a sealing surface is formed between the end face of the resistant layer facing the fitting and the top end of the fitting. Since the resistant layer will not be overly damaged due to the corrosiveness and chemical properties of the liquid, the sealing effect of the sealing surface is not affected by the corrosiveness and chemical properties of the liquid, and thus a good sealing effect can be maintained for a long time. The resistant layer and the top end of the fitting form an abutting seal due to the first extrusion ring. In addition to the buffer layer being able to buffer the liquid impact from the resistant layer, the first extrusion ring can also cooperate with the buffer layer to buffer the liquid impact from the resistant layer together. The resistant layer can prevent the liquid in the pipeline channel from contacting the buffer layer, avoiding the corrosiveness and chemical properties of the liquid from affecting the buffer layer, ensuring the buffer effect and deformation performance of the buffer layer. At the same time, the buffer layer can also buffer the extrusion force from the first extrusion ring to protect the resistant layer, preventing the first extrusion ring from directly extruding the resistant layer and causing damage to the resistant layer. The buffer layer and the resistant layer protect each other, ensuring the effective sealed connection of the breakable sealing diaphragm to the top end of the fitting.

[0034] 3. The positional relationship between the first extrusion ring and the support ring is such that they are radially staggered. When the sealing cover is connected to the container opening, the first extrusion ring applies a downward force to the buffer layer of the breakable sealing diaphragm. At the same time, the support ring applies an upward force to the resistant layer of the breakable sealing diaphragm from the lower end. Therefore, the downward force applied by the first extrusion ring to the breakable sealing diaphragm and the upward force applied by the support ring to the breakable sealing diaphragm are also staggered radially, enabling a large bending deformation to occur in the compressed area of the breakable sealing diaphragm, so that multiple sealing positions can be formed between the resistant layer of the breakable sealing diaphragm and the top end of the fitting, increasing the sealing effect between the resistant layer and the fitting. Combining with the pressing section applying a downward force to the buffer layer of the breakable sealing diaphragm, during the process of the pressing section and the first extrusion ring jointly extruding the breakable sealing diaphragm to deform, a circumferential abutting seal is formed between the resistant layer and the upper edge position of the inner side wall of the support ring; even when the pressing section and the first extrusion ring continue to push the breakable sealing diaphragm downward to deform, the resistant layer can form an abutting seal with the end face of the fitting, increasing the multiple sealing positions and sealing area between the resistant layer and the fitting, and thus increasing the sealing effect between the two.

[0035] 4. Through the mutual cooperation of the first extrusion ring and the second extrusion ring, on the one hand, along the radial direction of the fitting, at least two seals are formed between the resistant layer of the breakable sealing diaphragm and the top end of the fitting, further increasing the sealing effect; on the other hand, the breakable sealing diaphragm can undergo multiple bending deformations, so that the at least two sealing lines formed between the resistant layer and the top end of the fitting have a certain degree of tortuosity, and the area between the at least two seals can further prevent liquid leakage, further increasing the sealing effect between the two. Brief Description of the Drawings

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 Schematic perspective view of one embodiment of the sealing cap provided by the present invention.

[0038] Figure 2 For Figure 1 Schematic diagram of the connection between the sealing cap and the container in.

[0039] Figure 3 For Figure 2 Schematic cross-sectional view of the connection between the sealing cap and the opening of the container in.

[0040] Figure 4 For Figure 3 Enlarged schematic view of position A in.

[0041] Figure 5 For Figure 3 Enlarged schematic view of position B in.

[0042] Figure 6 For Figure 3 Enlarged schematic view of position C in.

[0043] Figure 7 Schematic perspective view of one embodiment of the rupturable sealing diaphragm.

[0044] Figure 8 For Figure 7 Partial cross-sectional view of.

[0045] Figure 9 For Figure 8 Cross-sectional view of position D in.

[0046] Figure 10 For Figure 2 Top view of.

[0047] Figure 11 For Figure 10 Cross-sectional view along the P-P section of.

[0048] Figure 12 For Figure 11 Enlarged schematic view of position E in.

[0049] Explanation of the reference numerals:

[0050] 100, Container; 101, Opening; 102, Fitting; 1020, Pipeline Passage; 1021, End Face; 1022, Support Ring; 103, Liner; 1, Cover; 11, First Extrusion Ring; 111, Pressing Section; 12, Mounting Ring; 121, Stop Ring; 13, Protruding Ring; 131, Sealing Groove; 2, Rupturable Sealing Diaphragm; 21, Tolerance Layer; 22, Buffer Layer; 3, Tearing Groove; 4, Tearing Portion; 5, Second Extrusion Ring; 6, Limit Projection; 7, Venting Groove; 8, Connecting Portion; 9, Score Mark. Detailed Implementation Manner

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0052] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "install", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0054] See Figures 1 to 9The embodiment of the utility model provides a sealing cover adapted for a container. When in use, the sealing cover is used to connect with the container 100, thereby ensuring the sealing of the container 100 and preventing the liquid stored in the container 100 from leaking. Such a container 100 generally includes an opening 101 and an accessory 102 installed in the opening 101. The accessory 102 has a through pipeline channel 1020. The sealing cover is generally connected to the opening 101 and can seal the top of the accessory 102 (the upper end of the pipeline channel 1020) to prevent the liquid from leaking from the pipeline channel 1020 during the process of liquid storage, transportation, extraction and distribution.

[0055] The sealing cover includes a cover body 1 and a rupturable sealing membrane 2. The cover body 1 is used to connect with the opening 101. The rupturable sealing membrane 2 is mainly used to seal the pipeline channel 1020 of the accessory 102 to prevent the liquid stored in the container 100 from leaking. When the cover body 1 is connected with the opening 101, the rupturable sealing membrane 2 is located on the inner side of the cover body 1 and covers the top of the accessory 102. The rupturable sealing membrane 2 is sealed and connected with the top of the accessory 102 so that the rupturable sealing membrane 2 seals the pipeline channel 1020. The rupturable sealing membrane 2 and the top of the accessory 102 can be sealed and connected by welding or bonding, or by the cover body 1 squeezing the rupturable sealing membrane 2 and abutting against the top of the accessory 102. The implementation method of the squeezing method is described in detail below. The rupturable sealing membrane 2 means that it can be punctured, so that when the liquid is drawn and dispensed, the drawing tube penetrates the rupturable sealing membrane 2 through the pipeline channel 1020 and extends into the container 100.

[0056] The rupturable sealing membrane 2 includes a resistant layer 21 and a buffer layer 22. The resistant layer 21 is arranged toward the pipeline channel 1020, and the buffer layer 22 is located on the side of the resistant layer 21 away from the pipeline channel 1020. The resistant layer 21 has corrosion resistance and chemical resistance, and the buffer layer 22 has a certain impact resistance and buffering performance.

[0057] When the breakable sealing diaphragm 2 is hermetically connected to the top end of the fitting 102, the resistant layer 21 faces the pipeline channel 1020. When the liquid in the container 100 reaches the position of the breakable sealing diaphragm 2 through the pipeline channel 1020, it contacts the resistant layer 21, without having a corrosive and chemical impact on the buffer layer 22. Thus, to a certain extent, it can avoid reducing the impact on the sealing connection surface between the breakable sealing diaphragm 2 and the top end of the fitting 102, ensuring an effective seal between the breakable sealing diaphragm 2 and the top end of the fitting 102. At the same time, the buffer layer 22 is located on the side of the resistant layer 21 away from the pipeline channel 1020 and can support the resistant layer 21 when the resistant layer 21 is impacted by the liquid in the container 100. Therefore, it can effectively absorb and disperse the impact force received by the resistant layer 21, preventing the impact force of the liquid in the container 100 from affecting the connection strength (welding strength, adhesion strength, or pressing strength) between the breakable sealing diaphragm 2 and the fitting 102, and preventing the generation of gaps in the sealing connection surface between the breakable sealing diaphragm 2 and the top end of the fitting 102 and the disconnection from the effective connection, ensuring the effective seal of the breakable sealing diaphragm 2 to the pipeline channel 1020.

[0058] Specifically, the resistant layer 21 can be made of a variety of materials, and the made resistant layer 21 has resistance to the corrosion and chemical properties of chemical liquid medicines (i.e., the liquid stored in the container 100). In this embodiment, the resistant layer 21 can be set as a fluororesin layer, preferably a PTFE layer, and PFA can also be selected, whose chemical stability is similar to that of PTFE and has extremely high tolerance. When the liquid stored in the container 100 is strong acid, strong base, oxidant, reductant, and various organic solvents, the resistant layer 21 will not be damaged, thus ensuring an effective seal between the breakable sealing diaphragm 2 and the top end of the fitting 102. Because once the breakable sealing diaphragm 2 is eroded by corrosive and chemical liquids for a long time, the sealing connection surface between the breakable sealing diaphragm 2 and the top end of the fitting 102 will be affected by the liquid and corrosion and become ineffective.

[0059] Specifically, the buffer layer 22 can also be made of a variety of materials. In this embodiment, the buffer layer 22 is set as a PE foam layer, that is, made of polyethylene (PE) foam material, so that the made buffer layer 22 has physical properties such as light texture, excellent elasticity, good buffering effect, strong impact resistance, good recovery, and can effectively absorb and disperse external forces. When the tolerance layer 21 is subjected to an impact force, the buffer layer 22 can stably support the tolerance layer 21, preventing the tolerance layer 21 from undergoing excessive deformation and resulting in a weakened connection strength with the top of the fitting 102, so that the tolerance layer 21 and the top of the fitting 102 can maintain a good sealed connection. At the same time, when the buffer layer 22 is set as a PE foam layer, it also has chemical properties such as non-toxic, odorless, acid and alkali corrosion resistant, and environmentally friendly, which is convenient for the subsequent treatment of the sealing cover and will not contaminate the stored liquid. In other embodiments, EPP, a polypropylene foam material, can also be selected to replace the PE foam layer as the buffer layer 22.

[0060] The tolerance layer 21 and the buffer layer 22 of the rupturable sealing diaphragm 2 can be set in a variety of structures, and the connection relationship between the two can be separately arranged. For example, the buffer layer 22 and the tolerance layer 21 are two layers stacked on top of each other, or they can be integrally connected. For example, the tolerance layer 21 is adhered to the lower surface of the buffer layer 22 or the tolerance layer 21 is coated on the lower surface of the buffer layer 22, which can achieve the sealing of the pipeline channel 1020, and the tolerance layer 21 faces the pipeline channel 1020, and the buffer layer 22 is located on the side of the tolerance layer 21 away from the pipeline channel 1020.

[0061] In this embodiment, both the tolerance layer 21 and the buffer layer 22 are circular structures, and the tolerance layer 21 and the buffer layer 22 are adhesively integrated, and the areas of the two are equal, that is, the tolerance layer 21 completely covers the lower surface of the buffer layer 22, and the tolerance layer 21 of the rupturable sealing diaphragm 2 is hermetically connected to the top of the fitting 102. Of course, in other embodiments, the area of the tolerance layer 21 can also be smaller than the area of the buffer layer 22, as long as the area of the tolerance layer 21 can cover the top port of the pipeline channel 1020. At this time, it can be the buffer layer 22 that is hermetically connected to the top of the fitting 102, but the tolerance layer 21 can protect the buffer layer 22 from being eroded by corrosive and chemical liquids.

[0062] See Figures 2 to 5, when the sealing cap is used to connect with the container 100, a threaded connection can be adopted between the cap body 1 and the opening 101. Threads are provided on the inner wall of the cap body 1, and the opening 101 has threads on the outer wall that match the threads of the cap body 1. Therefore, when sealing the container 100, the cap body 1 is screwed onto the opening 101 of the container 100. The breakable sealing diaphragm 2 is located inside the cap body 1 and is hermetically connected to the top end of the fitting 102, preventing liquid from leaking from the pipeline channel 1020 during transportation or transfer. Of course, in other embodiments, when the sealing cap is used to connect with the container 100, other feasible detachable connection methods can be adopted between the cap body 1 and the opening 101.

[0063] Furthermore, the cap body 1 includes a first extrusion ring 11 protruding towards the buffer layer 22. The first extrusion ring 11 is used to extrude the buffer layer 22 and the tolerance layer 21 so that the tolerance layer 21 abuts and seals against the top end of the fitting 102. It can be seen from this that when the cap body 1 is connected to the opening 101 of the container 100, the first extrusion ring 11 can apply a certain extrusion force to the buffer layer 22 and the tolerance layer 21. The first extrusion ring 11 directly extrudes the buffer layer 22 and transmits the force to the tolerance layer 21, and then the tolerance layer 21 can be made to abut and seal against the top end of the fitting 102. Therefore, the cap body 1 not only connects to the opening 101 of the container 100, but also provides sufficient extrusion force to the buffer layer 22 and the tolerance layer 21, enhancing the connection strength between the breakable sealing diaphragm 2 and the top end of the fitting 102. Compared with the breakable sealing diaphragm being welded or adhesively sealed to the top end of the fitting 102, when subjected to liquid impact, it is equivalent to the cap body 1 being able to resist the impact of the liquid on the breakable sealing diaphragm 2. Combining the buffering effect of the buffer layer 22 itself on the liquid impact, the performance of the breakable sealing diaphragm 2 abutting and sealing against the top end of the fitting 102 is superior to the welding or adhesive sealing method.

[0064] In addition, since the buffer layer 22 can protect the tolerance layer 21 from direct contact with the first extrusion ring 11, during the process of connecting the cover body 1 to the opening 101, such as screwing the cover body 1 onto the opening 101, the rotating first extrusion ring 11 rubs against the upper surface of the buffer layer 22 and does not contact the tolerance layer 21. Thus, while forming an effective seal between the tolerance layer 21 and the top end of the fitting 102, the tolerance layer 21 is not worn. Therefore, the buffer layer 22 protects the tolerance layer 21 from contact wear by the first extrusion ring 11. At the same time, the tolerance layer 21 forms a butt joint seal with the top end of the fitting 102, which can prevent the liquid in the pipeline channel 1020 from contacting the buffer layer 22 and avoid the corrosive and chemical effects of the liquid stored in the container 100 on the buffer layer 22, ensuring the buffer effect and deformation performance of the buffer layer 22. Therefore, the tolerance layer 21 and the buffer layer 22 protect each other. Through the extrusion of the first extrusion ring 11, the tolerance layer 21 forms a butt joint seal with the top end of the fitting 102, that is, a sealed connection surface is formed between the end surface on the side of the tolerance layer 21 facing the fitting 102 and the top end of the fitting 102. Also, since the tolerance layer 21 is not overly damaged due to the corrosiveness and chemical properties of the liquid, the sealing effect of the sealed connection surface is not affected by the corrosiveness and chemical properties of the liquid, and thus an effective seal can be maintained.

[0065] To further enhance the sealing effect, one end of the fitting 102 facing the tolerance layer 21 has an end surface 1021 and a support ring 1022 protruding from the end surface 1021; the support ring 1022 has an inner side wall, an outer side wall, and a connection surface connecting the inner side wall and the outer side wall; the first extrusion ring 11 extrudes the buffer layer 22 and the tolerance layer 21 so that the tolerance layer 21 abuts and seals with one or more of the inner side wall, the outer side wall, the connection surface, and the end surface 1021. Therefore, the support ring 1022 and the end surface 1021 form a stepped structure, and the breakable sealing diaphragm 2 can form at least one abutting sealing surface with the stepped structure under the extrusion of the first extrusion ring 11.

[0066] In this embodiment, the first extrusion ring 11 is located radially inside the support ring 1022 and is correspondingly arranged with the end face 1021. When the sealing cover is connected to the opening 101 of the container 100, the first extrusion ring 11 applies a downward extrusion force to the buffer layer 22 of the breakable sealing diaphragm 2 from above. At the same time, the support ring 1022 applies an upward extrusion force to the tolerance layer 21 of the breakable sealing diaphragm 2 from below. Therefore, the downward force applied by the first extrusion ring 11 to the breakable sealing diaphragm 2 and the upward force applied by the support ring 1022 to the breakable sealing diaphragm 2 are offset radially. The breakable sealing diaphragm 2 is stressed and undergoes bending deformation. During the process of the first extrusion ring 11 extruding the breakable sealing diaphragm 2 to cause deformation, since the first extrusion ring 11 is inside the support ring 1022, the first extrusion ring 11 can extrude the tolerance layer 21 to form a butt joint seal at a position close to the upper edge of the inner side wall of the support ring 1022 (i.e., the position where the inner side wall of the support ring 1022 is connected to the connection surface). When the first extrusion ring 11 continues to extrude the breakable sealing diaphragm 2 to deform, the tolerance layer 21 can even form a butt joint seal with the end face 1021 of the fitting 102, increasing the sealing points between the tolerance layer 21 and the fitting 102, thereby ensuring the sealing effect between the two.

[0067] Furthermore, the outer side surface of the first extrusion ring 11 is set as an inclined surface to form a butt joint seal by extruding the tolerance layer 21 and the position close to the upper edge of the inner side wall of the support ring 1022 through the inclined surface. The setting of the inclined surface is conducive to stress concentration, improving the extrusion effect of the first extrusion ring 11 and the support ring 1022 on the breakable sealing diaphragm 2, and ensuring the sealing performance between the tolerance layer 21 and the support ring 1022. Of course, in other embodiments, the outer side surface of the first extrusion ring 11 may not be set as an inclined surface, and the outer wall surface of the first extrusion ring 11 may also be an arc surface.

[0068] Furthermore, the lower end of the first extrusion ring 11 is set as an arc shape, that is, the inner wall surface and the outer wall surface of the first extrusion ring 11 are connected by an arc surface. The arc-shaped structure can reduce the contact area between the first extrusion ring 11 and the buffer layer 22, which is not only conducive to stress concentration, improving the extrusion effect of the first extrusion ring 11 on the breakable sealing diaphragm 2, so that the breakable sealing diaphragm 2 can form an effective extrusion seal with the top end of the fitting 102, but also can reduce the wear of the first extrusion ring 11 on the buffer layer 22.

[0069] Furthermore, an outer wall surface of the first pressing ring 11 extends outward to form a pressing section 111. The pressing section 111 is at least partially arranged corresponding to the support ring 1022. The pressing section 111 can extend outward from the upper end of the outer wall surface (such as an inclined surface) of the first pressing ring 11. When the first pressing ring 11 presses the tolerance layer 21 until it abuts against the inner side wall of the support ring 1022 near the upper edge position, the pressing section 111 can further press the connection surface between the tolerance layer 21 of the breakable seal diaphragm 2 and the support ring 1022. On the one hand, the pressing section 111 can press the buffer layer 22 and the area of the tolerance layer 21 corresponding to the connection surface to cause further deformation, preventing the area of the buffer layer 22 and the tolerance layer 21 corresponding to the connection surface from warping upward, and ensuring effective abutting and sealing between the tolerance layer 21 and the inner side wall of the support ring 1022 near the upper edge position. On the other hand, the pressing section 111 can press the connection surface between the tolerance layer 21 and the support ring 1022 to abut and seal, further increasing the sealing points and the sealing area, and enhancing the sealing effect between the two.

[0070] During the use process of drawing and distributing the liquid in the container 100, usually, a part of the cover body 1 is lifted to expose the breakable seal diaphragm 2, and then an external device or a suction tube is used to pierce the breakable seal diaphragm 2. The liquid in the container 100 can be exported by passing the suction tube through the breakable seal diaphragm 2 and extending it into the container 100 via the pipeline channel 1020. For example, suction is directly applied at one end of the suction tube for extraction, or driving gas is supplied to the inner layer of the container 100 outside the fitting 102 and pressure is applied to promote the liquid in the container 100 to enter the suction tube and be exported. Therefore, a tearing groove 3 is formed on the inner surface of the cover body 1 radially inside the first pressing ring 11; a tearing part 4 is arranged on the outer surface of the cover body 1. When the tearing part 4 is stressed, a part of the cover body 1 can be pulled to break along the tearing groove 3 to expose the buffer layer 22. At the same time, the first pressing ring 11 is not affected by the local breakage of the cover body 1, and the first pressing ring 11 always presses the breakable seal diaphragm 2 to keep the tolerance layer 21 and the upper end of the fitting 102 sealed all the time, avoiding the leakage of the liquid remaining in the pipeline channel 1020 from the sealed position between the tolerance layer 21 and the top end of the fitting 102 during the liquid export process.

[0071] In order to further enhance the sealing performance of the sealing cover, in this embodiment, the cover body 1 further includes a second extrusion ring 5 protruding towards the buffer layer 22. The second extrusion ring 5 is correspondingly arranged with the pipeline channel 1020. In the axial direction of the container 100, the lowest position of the second extrusion ring 5 is not higher than the lowest position of the first extrusion ring 11 in the axial direction. When the cover body 1 is connected to the opening 101 of the container 100 (such as during the process of screwing the cover body 1 downwards), first, the second extrusion ring 5 will squeeze the area of the breakable sealing diaphragm 2 corresponding to the pipeline channel 1020. The second extrusion ring 5 can squeeze the tolerance layer 21 of the breakable sealing diaphragm 2 to the upper edge position of the inner side wall of the pipeline channel 1020, so that the tolerance layer 21 forms a butt joint seal with the upper edge of the inner side wall of the pipeline channel 1020. At the same time, the first extrusion ring 11 also squeezes the tolerance layer 21 of the breakable sealing diaphragm 2 to a position close to the upper edge of the inner side wall of the support ring 1022, so that the tolerance layer 21 forms a butt joint seal with the inner wall surface of the support ring 1022 close to the upper edge position. That is, through the mutual cooperation of the first extrusion ring 11 and the second extrusion ring 5, on the one hand, in the radial direction of the container 100, the tolerance layer 21 of the breakable sealing diaphragm 2 forms at least two seals with the top end of the fitting 102, further enhancing the sealing effect; on the other hand, the breakable sealing diaphragm 2 can generate multiple bending deformations. There is a height difference in the axial direction of the container 100 between the sealing point formed by the first extrusion ring 11 where the tolerance layer 21 and the inner side wall of the support ring 1022 are close to the upper edge position and the sealing point formed by the second extrusion ring 5 where the tolerance layer 21 and the upper edge of the inner side wall of the pipeline channel 1020 are in contact. Therefore, the sealing line between the tolerance layer 21 and the top end of the fitting 102 becomes tortuous, further enhancing the sealing effect between the two.

[0072] Furthermore, the lower end of the second pressing ring 5 can also be set to an arc-shaped structure, which has the same function as the lower end of the first pressing ring 11 being set to an arc shape. Moreover, the second pressing ring 5 is located radially inside the tearing groove 3. Before the cover body 1 is partially torn, in addition to the first pressing ring 11 pressing on the buffer layer 22 and the tolerance layer 21 to buffer the impact of the liquid, the second pressing ring 5 pressing on the buffer layer 22 and the tolerance layer 21 can also buffer the impact of the liquid. Therefore, the cooperation of the buffer layer 22 itself, the pressing of the first pressing ring 11, and the pressing of the second pressing ring 5 further resists the impact of the liquid on the breakable sealing diaphragm 2. Because before the liquid is drawn and distributed (before the cover body 1 is partially torn), during the processes such as the turnover and transportation of the container 100, there is a great possibility that the liquid inside the container 100 will impact the breakable sealing diaphragm 2 when the container 100 shakes. However, when the liquid in the container 100 is drawn and distributed, the container 100 in use basically does not shake, and the liquid no longer impacts the breakable sealing diaphragm 2. The second pressing ring 5 releases the pressing on the breakable sealing diaphragm 2 as the cover body 1 is partially torn, and the pressing of the first pressing ring 11 still keeps the tolerance layer 21 abutted and sealed against the top of the fitting 102. In addition, because the second pressing ring 5 resists the impact of the liquid before the liquid is drawn and distributed (before partial tearing), the pressing of the first pressing ring 11 is basically not affected by the impact of the liquid, and the pressing force of the first pressing ring 11 can still ensure effective sealing during the process of piercing and penetrating the breakable sealing diaphragm 2.

[0073] See Figure 3 and Figures 7 to 9 , in order to facilitate piercing the buffer layer 22 and the tolerance layer 21 so that the suction tube penetrates into the container 100 to discharge the liquid, and at the same time does not affect the tolerance layer 21, several notches 9 are provided on the surface of the buffer layer 22 facing the cover body 1. Each notch 9 extends radially from the center of the buffer layer 22. No notch 9 is provided on the tolerance layer 21 to keep it airtight. For example, when the suction tube pierces the center of the buffer layer 22, the tolerance layer 21 can rupture along the extending direction of the notch 9 from the center position, which is convenient for the suction tube to be inserted into the pipeline channel 1020, and at the same time, it can prevent the large break of the tolerance layer 21 from causing the possible debris of the buffer layer 22 to enter the container 100. Among them, the notch 9 is an elongated groove, and preferably the notch 9 basically penetrates the buffer layer 22 so that the tolerance layer 21 can be seen. Of course, the notch 9 can also not penetrate the buffer layer 22.

[0074] See Figure 3 and Figure 6, in order to further reduce the influence of the impact force of the liquid on the sealing performance between the breakable sealing diaphragm 2 and the fitting 102, the cover body 1 is provided with a limiting protrusion 6 protruding towards the buffer layer 22. The limiting protrusion 6 is located radially inside the second pressing ring 5, so that the limiting protrusion 6 is arranged opposite to the pipeline channel 1020. When the area of the breakable sealing diaphragm 2 opposite to the pipeline channel 1020 is subjected to a large liquid impact force, causing the buffer layer 22 to deform and contact the limiting protrusion 6, the limiting protrusion 6 can support the buffer layer 22 to limit the further upward deformation of the breakable sealing diaphragm 2, and further limit the excessive deformation of the area of the breakable sealing diaphragm 2 opposite to the pipeline channel 1020, avoiding the hidden danger of weakening the sealing performance between the tolerance layer 21 and the top of the fitting 102 caused by insufficient extrusion sealing strength of the first pressing ring 11 and the second pressing ring 5 on the outer edge area of the breakable sealing diaphragm 2.

[0075] Furthermore, the limiting protrusion 6 is preferably arranged opposite to the position of the notch 9, and can support the position of the buffer layer 22 provided with the notch 9, avoiding the problem that the notch 9 weakens the buffer performance when the buffer layer 22 is subjected to an impact force.

[0076] See Figure 3 , in order to facilitate the extraction and distribution of the liquid in the container 100, the inner surface of the cover body 1 is provided with a ventilation groove 7 for communicating with the outer space of the pipeline channel 1020. The outer space of the pipeline channel 1020 refers to the space outside the sealed point at the top of the breakable sealing diaphragm 2 and the fitting 102, which is approximately the annular space outside the first pressing ring 11. The outer surface of the cover body 1 is provided with a connecting portion 8. One end of the connecting portion 8 is connected to the area of the cover body 1 opposite to the ventilation groove 7, and the other end is connected to the tearing portion 4. When the tearing portion 4 is stressed, it pulls the connecting portion 8, so that the connecting portion 8 pulls a part of the cover body 1 to tear along the edge of the ventilation groove 7. When it is necessary to extract and distribute the liquid in the container 100, the tearing portion 4 can be pulled, and at the same time, the ventilation groove 7 is communicated with the outside world and the buffer layer 22 is exposed. At this time, the extraction tube can penetrate the breakable sealing diaphragm 2, and at the same time, air can enter the outer space of the pipeline channel 1020 through the ventilation groove 7. For example, an external device equipped with a gas source is connected to the ventilation groove 7, and the gas in the outer space of the pipeline channel 1020 enters the container 100 to directly squeeze the liquid or the lining (bag) containing the liquid, so as to squeeze the liquid into the extraction tube and export it. Therefore, in the embodiment of squeezing the lining (bag) through the ventilation groove 7 to introduce gas into the outer space of the pipeline channel 1020 and distributing the liquid extraction tube, the sealing performance between the breakable sealing diaphragm 2 and the top of the fitting 102 is more important. The breakable sealing diaphragm 2 not only needs to prevent the liquid in the lining (bag) from leaking, but also needs to prevent the gas in the outer space of the pipeline channel 1020 from entering the pipeline channel 1020 and then entering the lining (bag).

[0077] Participate Figure 3and Figure 4 In order to avoid radial displacement of the position of the frangible diaphragm 2 during the rotation of the cover body 1 to connect with the opening 101, which may cause wrinkles in the frangible diaphragm 2 itself, and further avoid the hidden danger of poor sealing effect between the frangible diaphragm 2 and the top of the fitting 102 during the installation process. In this embodiment, the cover body 1 includes an installation ring 12 protruding downward, the installation ring 12 is disposed around the radial outer side of the first extrusion ring 11, the frangible diaphragm 2 is accommodated inside the installation ring 12, and a stop ring 121 for preventing the frangible diaphragm 2 from falling downward is radially protruded on the inner wall of the installation ring 12. During the process of installing the cover body 1 on the opening 101, the frangible diaphragm 2 can be stably accommodated in the area surrounded by the installation ring 12 and the stop ring 121.

[0078] See Figure 2 and Figure 3 As shown in and, the inner wall surface of the cover body 1 is provided with threads for connecting with the opening 101. In order to further enhance the sealing effect between the sealing cover and the opening 101, a protruding ring 13 protruding from the inner wall surface of the cover body 1 is provided above the threads. A sealing groove 131 for accommodating an O-ring is formed between the protruding ring 13 and the inner side wall of the cover body 1. The sealing groove 131 faces the top surface of the opening 101. When the cover body 1 is threadedly connected with the opening 101, the O-ring can be blocked in the sealing groove 131 and compressed with the top surface of the opening 101 for sealing, so as to prevent the liquid from leaking outside the container 100 when the frangible sealing member 2 fails and leaks.

[0079] Refer to Figure 2 and Figures 10 to 12, the present application also provides a container system, including a container 100 and a sealing cover threadedly connected to the opening 101 of the container 100. The sealing cover is the sealing cover described in any of the above, thereby being able to ensure the sealing performance of the container 100 and avoid the potential risk of liquid leakage during the processes of storing, transporting, drawing, and dispensing the liquid in the container 100. The bottom of the fitting 102 is hermetically connected (welded or bonded) with a lining 103. The inside of the lining 103 communicates with the pipeline channel 1020. The lining 103 is used for containing the liquid and is placed inside the cavity of the container 100. Therefore, when the container system shakes due to transportation or other reasons, the liquid stored in the lining 103 can only impact the breakable sealing diaphragm 2 through the pipeline channel 1020. The tolerance and buffering of the breakable sealing diaphragm 2 are crucial. An annular space is formed between the lining 103 and the container 100. The outer side (annular space) of the lining 103 is connected to the ventilation groove 7. When it is necessary to draw and dispense the liquid, gas can be introduced into the outer side (annular space) of the lining 103 from the ventilation groove 7. The fitting 102 is provided with a through hole (not shown in the figure) for introducing the gas into the annular space. The lining 103 is pressed by the gas in the annular space, and the liquid in the lining 103 is led out by a suction pipe (not shown in the figure) that penetrates the breakable sealing diaphragm 2.

[0080] It should be noted that in the above description of directions, "up" refers to the side closer to the sealing cover along the axial direction of the container 100. In contrast, "down" refers to the side farther from the sealing cover along the axial direction of the container 100; "inside" refers to the side closer to the central axis of the container 100 along the radial direction of the container 100. In contrast, "outside" refers to the side farther from the central axis of the container 100 along the radial direction of the container 100. "Top" is Figure 3 where the fitting 102 is at the high position in the axial direction, and "bottom" is Figure 3 where the fitting 102 is at the low position in the axial direction. The central axis of the container 100 and the so-called axial direction both refer to Figure 3 the up and down direction in

[0081] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A sealing cover adapted for a container, the container comprising an opening and a fitting installed in the opening, the fitting having a through-going pipeline channel, characterized in that: The sealing cover comprises a cover body and a rupturable sealing membrane. When the cover body is connected to the opening, the rupturable sealing membrane is located inside the cover body and covers the top end of the accessory. The rupturable sealing membrane is sealed and connected to the top end of the accessory so that the rupturable sealing membrane seals the pipeline channel. The rupturable sealing membrane comprises a resistance layer and a buffer layer. The resistance layer is arranged toward the pipeline channel, and the buffer layer is located at a side of the resistance layer away from the pipeline channel.

2. A sealing cover adapted for a container according to claim 1, characterized in that: The cover body comprises a first extrusion ring protruding toward the buffer layer, and the first extrusion ring is used for extruding the buffer layer and the resistance layer so that the resistance layer abuts and seals against the top end of the accessory.

3. A sealing cover adapted for a container according to claim 2, characterized in that: The top end of the accessory has an end surface and a support ring protruding from the end surface; The support ring has an inner side wall, an outer side wall, and a connecting surface connecting the inner side wall and the outer side wall; The first extrusion ring extrudes the buffer layer and the resistant layer so that the resistant layer abuts and seals against one or more of the inner side wall, the outer side wall, the connecting surface, and the end surface.

4. A sealing cover adapted for a container according to claim 3, characterized in that: The first extrusion ring is located at the radial inner side of the support ring and is arranged corresponding to the end surface; The outer wall surface of the first extrusion ring extends outward to form a pressing section, and at least a portion of the pressing section is arranged corresponding to the connecting surface.

5. A sealing cover adapted for a container according to any one of claims 2 to 4, characterized in that: The inner surface of the cover body is provided with a tearing groove on the radial inner side of the first extrusion ring; The outer surface of the cover body is provided with a tearing portion. When the tearing portion is subjected to force, a part of the cover body can be pulled to break along the tearing groove to expose the buffer layer.

6. A sealing cover adapted for a container according to claim 5, characterized in that: The cover body also includes a second extrusion ring protruding toward the buffer layer, the second extrusion ring is located radially inward of the tear groove, the second extrusion ring is arranged corresponding to the pipeline channel, and the lowest position of the second extrusion ring is not higher than the lowest position of the first extrusion ring in the axial direction.

7. A sealing cover adapted for a container according to claim 6, characterized in that: The cover body further comprises a limiting protrusion protruding toward the buffer layer, and the limiting protrusion is located radially inward of the second extrusion ring.

8. A sealing cover adapted for a container according to claim 1 or 7, characterized in that: The buffer layer is configured as a PE foam layer, and the resistance layer is configured as a fluororesin layer; Alternatively, the buffer layer and the resistance layer are integrally connected to form the rupturable sealing membrane; Alternatively, a surface of the buffer layer facing the cover body is provided with a plurality of notches, and each of the notches extends radially from the center of the buffer layer.

9. A sealing cover adapted for a container according to claim 5, characterized in that: The inner surface of the cover body is provided with a ventilating groove for connecting to the outer space of the pipeline channel; A connecting portion is provided on the outer surface of the cover body, one end of the connecting portion is connected to the area of ​​the cover body facing the vent groove, and the other end is connected to the tearing portion. When the tearing portion is subjected to force, the connecting portion is pulled so that the connecting portion pulls a part of the cover body to tear along the edge of the vent groove; Alternatively, the cover body includes a mounting ring protruding downward, the mounting ring is arranged radially outside the first extrusion ring, the rupturable sealing diaphragm is accommodated on the inner side of the mounting ring, and a stop ring is radially protruded on the inner wall of the mounting ring for preventing the rupturable sealing diaphragm from falling downward.

10. A container system, characterized in that: It comprises a container and a sealing cover threadedly connected to the opening of the container, the sealing cover being as described in any one of claims 1 to 9, the bottom of the accessory being sealedly connected with a liner, the liner being accommodated in the inner cavity of the container, the interior of the liner being connected to the pipeline channel.

Images