Air pressure self-balancing type seal ring

Abstract

The present application belongs to the technical field of sealing rings, and particularly relates to a gas pressure automatic balancing type sealing ring, which comprises a sealing ring body and an air channel located on the sealing ring body; the air channel is communicated with the inner and outer sides of the sealing ring, and is cut off by a sealing liquid part on one side of the sealing ring; the air channel is used for flowing gas, and the sealing liquid part is used for sealing liquid and balancing gas pressure. The gas pressure automatic balancing type sealing ring can play the role of sealing liquid to prevent the liquid in the container from spilling outside, and can also play the role of balancing the pressure inside and outside the container to prevent the pressure inside the container from being too high or too low.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sealing rings, in particular, the present application relates to a kind of air pressure automatic balancing type sealing ring. BACKGROUND

[0002] In water cup, pressure cooker, thermal bowl and other tableware, and pipeline and other industrial equipment, sealing ring as sealing water, gas, and dustproof parts often appear.Sealing ring is often located at the junction of two components, plays a sealing role, isolates the exchange of gas and liquid inside and outside the component.

[0003] On the outside of the component, the pressure received by the component is generally atmospheric pressure, and the change range is not large and can be ignored;In the internal part of the component, due to the temperature change of the contained medium, the change of macro state (gaseous, solid, liquid), the change range of pressure is much larger than that on the outside of the component, therefore, negative pressure and high pressure often exist in the internal part of the component.For example, the internal part of high pressure pot is often high pressure (higher than one standard atmospheric pressure, the pressure in the high pressure pot is greater than the pressure outside the high pressure pot;The internal part of the thermal cup filled with boiling water is often negative pressure (lower than one standard atmospheric pressure, the pressure in the thermal cup is less than the pressure outside the thermal cup) after the water temperature drops.

[0004] When the internal pressure of the component exceeds the predetermined pressure, there is a safety risk, and the pressure needs to be released outward;When the internal part of the component is negative pressure, it is difficult to open, and it is often not easy to open.The existing sealing ring can only play a sealing role when in use, and does not have the function of balancing air pressure, so the above problems cannot be solved by using the existing sealing ring. SUMMARY

[0005] In order to solve the above problems, the present application provides a kind of air pressure automatic balancing type sealing ring, its technical scheme is as follows:

[0006] A kind of air pressure automatic balancing type sealing ring, including sealing ring body and the gas channel on the sealing ring body;The gas channel is communicated with the inside and outside of the sealing ring body, and is cut off by the sealing liquid part on one side of the sealing ring body;The gas channel is used for flowing gas, and the sealing liquid part is used for sealing liquid and balancing air pressure.

[0007] The air pressure automatic balancing type sealing ring as described above is further preferably: the number of the gas channel is one.

[0008] The air pressure automatic balancing type sealing ring as described above is further preferably: the number of the gas channel is multiple, and multiple gas channels are distributed in a circular array on the sealing ring body.

[0009] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that the air passage is in an inverted U shape, and the depth of the air passage at the top of the sealing ring body is greater than the depth of the air passage at both the inner and outer sides of the sealing ring body.

[0010] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that along the extension direction of the air passage, the width of the air passage is set to be equal.

[0011] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that along the width direction of the air passage, the bottom surface of the air passage is smoothly connected to the side surface of the air passage.

[0012] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that on the other side of the sealing liquid part, a flange is arranged on the sealing ring body, and the flange is located on both sides of the air passage; along the axial direction of the sealing ring body, the flange gradually thins from bottom to top until it is flush with the sealing ring body.

[0013] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that the sealing liquid part and the sealing ring body are integrally formed.

[0014] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that along the axial direction of the sealing ring body, the thickness of the sealing liquid part accounts for one-tenth to one-thirtieth of the thickness of the sealing ring body on the side where the sealing liquid part is located.

[0015] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that the surface of the sealing liquid part facing the air passage is a cut-off surface, and the cut-off surface and the bottom surface of the air passage and the side surface of the air passage form a cut-off edge.

[0016] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that the air passage is in an inverted U shape, and the air passage includes a first through groove, a second through groove and a sink groove; the first through groove is located on one side of the sealing ring body; the sink groove is located on the other side of the sealing ring body and is connected to the sealing liquid part; and the second through groove is located in the sealing ring body, penetrates through the sealing ring body and is connected to the first through groove and the sink groove respectively.

[0017] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that the sealing ring body is in a ring shape and is used to seal between two devices, and the sealing liquid part is located on the inner side of the sealing ring body and is used to guide the gas from the air passage under negative pressure.

[0018] The air pressure automatic balance type sealing ring as described above is further preferably characterized in that along the axial direction of the sealing ring body, the thickness of the inner side of the sealing ring body is greater than the thickness of the outer side of the sealing ring body.

[0019] The air pressure automatic balancing type sealing ring as described above is further preferably characterized in that the bottom of the sealing ring body is provided with a groove, the cross-sectional profile of the groove is arc-shaped, and the top end is higher than the bottom of the inner side of the sealing ring body and the bottom of the outer side of the sealing ring body; the outer side of the groove is connected with the outer side of the sealing ring body; the inner side of the groove is connected with the bottom of the sealing ring body, and the connection is smooth.

[0020] The air pressure automatic balancing type sealing ring as described above is further preferably characterized in that the sealing ring body is annular, used for sealing between two devices, and the sealing liquid part is located on the outer side of the sealing ring body, used for conducting gas from the gas channel under positive pressure.

[0021] The air pressure automatic balancing type sealing ring as described above is further preferably characterized in that, along the axial direction of the sealing ring body, the thickness of the outer side of the sealing ring body is greater than the thickness of the inner side of the sealing ring body.

[0022] The air pressure automatic balancing type sealing ring as described above is further preferably characterized in that the bottom of the sealing ring body is provided with a groove, the cross-sectional profile of the groove is arc-shaped, and the top end is higher than the bottom of the inner side of the sealing ring body and the bottom of the outer side of the sealing ring body; the inner side of the groove is connected with the inner side of the sealing ring body; the outer side of the groove is connected with the bottom of the sealing ring body, and the connection is smooth.

[0023] The air pressure automatic balancing type sealing ring as described above is further preferably characterized in that the cross-sectional top profile of the sealing ring body is arc-shaped, and is smoothly connected with the inner side profile and the outer side profile of the sealing ring body.

[0024] The air pressure automatic balancing type sealing ring as described above is further preferably characterized in that the sealing ring body is annular, used for sealing between two devices, and the sealing ring body comprises an integral transverse part and a longitudinal part, the longitudinal part is located below the transverse part, and the sealing liquid part is located on the longitudinal part; the gas channel comprises a transverse groove and a longitudinal groove connected with each other, the transverse groove is located on the transverse part, the longitudinal groove is located on the longitudinal part, and the bottom of the longitudinal groove is connected with the sealing liquid part; the transverse groove is located on the top surface of the transverse part and the longitudinal groove is located on the inner side of the longitudinal part, and / or the transverse groove is located on the bottom surface of the transverse part and the longitudinal groove is located on the outer side of the longitudinal part.

[0025] The air pressure automatic balancing type sealing ring as described above is further preferably characterized in that the longitudinal part is connected with the inner side of the transverse part, and the sealing liquid part is used for conducting gas from the gas channel under negative pressure.

[0026] The air pressure automatic balance type sealing ring as described above is further preferably that the longitudinal part is connected with the outer side of the horizontal part, and the sealing liquid part is used to guide the gas from the air channel when the pressure is positive.

[0027] The air pressure automatic balance type sealing ring as described above is further preferably that the sealing ring body is annular and used to seal between two devices, the sealing ring body comprises an integrally formed horizontal part and longitudinal part, the middle part of the horizontal part is connected with the longitudinal part, and the sealing liquid part is located on the horizontal part; the air channel comprises a first air groove, a second air groove, a third air groove, a first air gap and a second air gap; the first air groove and the second air groove are respectively located at two ends of the horizontal part, the first air groove penetrates one end of the horizontal part, the second air groove is connected with the sealing liquid part, and the third air groove penetrates the free end of the longitudinal part; the two sides of the longitudinal part form the first air gap and the second air gap with one device; a gas flow path is sequentially formed by the first air groove, the first air gap, the third air groove, the second air gap and the second air groove.

[0028] Analysis shows that, compared with the prior art, the air pressure automatic balance type sealing ring has the following advantages and beneficial effects:

[0029] The air pressure automatic balance type sealing ring can be used on a container, located at the joint of the container body and the container cover, and can play the role of sealing liquid and preventing the liquid in the container from spilling out, and can also play the role of balancing the pressure inside and outside the container to prevent the pressure inside the container from being too high or too low. When used for sealing and pressure relief, the side where the sealing liquid part is located faces the outside of the container, and when the pressure difference between the inside and outside of the container exceeds the preset range, the gas in the container pushes the sealing liquid part through the air channel and then is discharged to the outside of the container; when used for sealing and compensating negative pressure, the side where the sealing liquid part is located faces the inside of the container, and when the pressure difference between the inside and outside of the container exceeds the preset range, the gas outside the container pushes the sealing liquid part through the air channel and then enters the container. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Structure diagram of an embodiment of the present application Figure 1 ;

[0031] Figure 2 For Figure 1 Enlarged view at A;

[0032] Figure 3 Structure diagram of an embodiment of the present application Figure 2 ;

[0033] Figure 4 For Figure 3 Enlarged view at B;

[0034] Figure 5 Top view of an embodiment of the present application

[0035] Figure 6 is Figure 5 a sectional view at C;

[0036] Figure 7 is Figure 5 a partial enlarged view at D;

[0037] Figure 8 is Figure 6 a partial enlarged view at E;

[0038] Figure 9 is Figure 6 a partial enlarged view at F;

[0039] Figure 10 is a sectional view of a water injection heat preservation bowl;

[0040] Figure 11 is Figure 10 a partial enlarged view at G;

[0041] Figure 12 is a structural schematic view of another embodiment of the present application;

[0042] Figure 13 is Figure 12 a partial enlarged view at H;

[0043] Figure 14 is Figure 12 a sectional view of a water injection heat preservation bowl;

[0044] Figure 15 is Figure 14 a partial enlarged view at J;

[0045] Figure 16 is Figure 14 a partial enlarged view at I;

[0046] Figure 17 is a structural schematic view of another embodiment of the present application;

[0047] Figure 18 is Figure 17 a sectional view of a water injection heat preservation bowl;

[0048] Figure 19 is a sectional view of another embodiment of the present application;

[0049] Figure 20 is a sectional view of another embodiment of the present application;

[0050] Figure 21 is a structural schematic view of another embodiment of the present application;

[0051] Figure 22 is Figure 21 a sectional view of a water injection heat preservation bowl installed in a device;

[0052] Figure 23 Structure diagram of another embodiment of the present application;

[0053] Figure 24 Structure diagram of another embodiment of the present application; Figure 23 Local enlarged view at K;

[0054] Figure 25 Structure diagram of another embodiment of the present application; Figure 23 Sectional view of the structure diagram.

[0055] In the figure: 1-seal ring body; 2-air channel; 3-flange; 4-sealing liquid part; 5-stop surface; 6-groove; 7-inner bowl; 8-water storage cavity; 9-outer bowl; 10-bowl edge; 11-second air groove; 12-third air groove; 13-first air groove; 14-second air gap; 15-first air gap; 16-first through groove; 17-second through groove; 18-sink groove. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0057] In the description of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application, and are not required to be the specific orientations and operations of the present application, and therefore cannot be understood as a limitation on the present application. The terms "connected", "connected" used in the present application should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection; can be directly connected, can also be indirectly connected through intermediate components, and the specific meanings of the above terms can be understood by those skilled in the art according to specific circumstances.

[0058] Please refer to Figures 1 to 25 , wherein, Figure 1 Structure diagram of an embodiment of the present application Figure 1 ; Figure 2 Structure diagram of an embodiment of the present application Figure 1 Local enlarged view at A; Figure 3 Structure diagram of an embodiment of the present application Figure 2 ; Figure 4 Structure diagram of an embodiment of the present application Figure 3 Local enlarged view at B; Figure 5 Top view of an embodiment of the present application Figure 6 Structure diagram of an embodiment of the present applicationFigure 5 a sectional view at C; Figure 7 Figure 5 a partial enlarged view at D; Figure 8 Figure 6 a partial enlarged view at E; Figure 9 Figure 6 a partial enlarged view at F; Figure 10 a sectional view of a water infusion bowl; Figure 11 Figure 10 a partial enlarged view at G; Figure 12 a structural schematic view of another embodiment of the present application; Figure 13 Figure 12 a partial enlarged view at H; Figure 14 Figure 12 a sectional view; Figure 15 Figure 14 a partial enlarged view at J; Figure 16 Figure 14 a partial enlarged view at I; Figure 17 a structural schematic view of another embodiment of the present application; Figure 18 Figure 17 a sectional view; Figure 19 a sectional view of another embodiment of the present application; Figure 20 a sectional view of another embodiment of the present application; Figure 21 a structural schematic view of another embodiment of the present application; Figure 22 Figure 21 a sectional view installed in a device; Figure 23 a structural schematic view of another embodiment of the present application; Figure 24 Figure 23 a partial enlarged view at K; Figure 25 Figure 23 a sectional view.

[0059] As shown in Figure 1 , Figure 5 and Figure 7 , the present application provides a kind of air pressure automatic balancing type sealing ring, when using, it plays the role of sealing liquid and balancing air pressure.Air pressure automatic balancing type sealing ring mainly includes sealing ring body 1 and the air passage 2 on sealing ring body 1.Gas passage 2 is communicated with the inside and outside of sealing ring body 1, and, air passage 2 is cut off by sealing liquid part 4 on one side of sealing ring body 1, and on the other side of sealing ring body 1 with the gas in container or outside container.Gas passage 2 is used to flow through gas, sealing liquid part 4 is used to seal liquid and balance air pressure.

[0060] ​​​​​​​​​​​​The automatic pressure balancing sealing ring of the present invention is made of polymer material, such as rubber, thermoplastic elastomer, or plastic. When in use, it can be used on a container at the junction of the container body and the container lid. When in use, it can both seal the liquid to prevent the liquid inside the container from spilling out, and balance the pressure inside and outside the container to prevent the pressure inside the container from being too high or too low.

[0061] When used for sealing and depressurization, the side containing the sealing liquid part 4 faces outward from the container, and the sealing ring body 1 is located between the container body and the container cap, tightly attached to the container body and the container cap. When the pressure difference between the inside and outside of the container is within a preset range, the sealing ring body 1 and the sealing liquid part 4 play the role of sealing the liquid, and the sealing liquid part 4 will not be pushed. When the pressure difference between the inside and outside of the container exceeds the preset range, the gas inside the container passes through the air passage 2 and pushes the sealing liquid part 4 along the extension direction of the air passage 2. The sealing liquid part 4 deforms and a gap is created between it and the previously attached container body or container cap, so that the gas can be discharged to the outside of the container through the gap. After the pressure inside the container decreases, the sealing liquid part 4 re-cooperates with the sealing ring body 1 to play a sealing role.

[0062] When used for sealing and compensating for negative pressure, the side of the sealing liquid part 4 faces the inside of the container, and the sealing ring body 1 is located between the container body and the container cap, closely attached to the container body and the container cap. When the pressure difference between the inside and outside of the container is within a preset range, the sealing ring body 1 and the sealing liquid part 4 play the role of sealing the liquid, and the sealing liquid part 4 will not be pushed. When the pressure difference between the inside and outside of the container exceeds the preset range, the gas outside the container passes through the air passage and pushes the sealing liquid part 4 along the extension direction of the air passage 2. The sealing liquid part 4 deforms and a gap is created between it and the previously attached container body or container cap, so that the gas can enter the container through the gap. After the pressure inside the container increases, the sealing liquid part 4 re-cooperates with the sealing ring body 1 to play a sealing role.

[0063] like Figure 1 As shown, in the embodiments of the present invention, the number of air passages 2 can be one, which provides a better sealing effect during use; the number of air passages 2 can also be multiple, which provides a stronger ability to balance air pressure during use. When the number of air passages 2 is multiple, it is preferable that the multiple air passages 2 are distributed in a circumferential array on the sealing ring body 1.

[0064] like Figure 5 , Figure 6 and Figure 9As shown, in one embodiment of the present invention, the air passage 2 is an inverted U-shape, and the depth (a) of the air passage 2 at the top of the sealing ring body 1 is greater than the depth (b) at the inner side of the sealing ring body 1 and the depth (c) at the outer side of the sealing ring body 1. When the sealing ring body 1 is located at the junction of the container body and the container lid and performs a sealing function, it is often compressed in the axial direction of the sealing ring body 1. The greater depth of the air passage 2 at the top of the sealing ring body 1 than the depth at both the inner and outer sides of the sealing ring body 1 ensures that even if the sealing ring body 1 is compressed and deformed, the air passage 2 can still form a path for gas flow.

[0065] like Figure 5 and Figure 7 As shown, in one embodiment of the present invention, the width (L) of the air passage 2 is set at a constant width along the extension direction of the air passage 2, which facilitates processing and forming.

[0066] like Figure 5 and Figure 7 As shown, in one embodiment of the present invention, along the width direction of the airway 2 ( Figure 7 (Up and down direction), the bottom surface of the air passage 2 and the side surface of the air passage 2 are smoothly transitioned, which facilitates the molding of the sealing ring body 1. At the same time, it can improve the tear resistance of the sealing ring body 1, thereby increasing its service life.

[0067] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, on the other side of the sealing liquid part 4, the sealing ring body 1 is provided with a flange 3. The flange 3 is located on both sides of the air passage 2 and is used to assist the air passage 2 in intake, so as to prevent the air passage 2 from being blocked due to the deformation of the sealing ring body 1.

[0068] Furthermore, such as Figure 3 and Figure 4 As shown, along the axial direction of the sealing ring body 1, the flange 3 gradually thins from bottom to top until it is flush with the sealing ring body 1.

[0069] like Figure 6 and Figure 9 As shown, in one embodiment of the present invention, the sealing liquid part 4 and the sealing ring body 1 are integrally formed. The air pressure automatic balancing type sealing ring is made of rubber (preferably silicone). After processing and molding, the sealing liquid part 4 and the sealing ring body 1 become one piece, and the air passage 2 is formed on the sealing ring body 1. Thus, the whole is only a single component, with a simple structure and easy to use.

[0070] like Figure 6 and Figure 9As shown in the figure, in one embodiment of the present application, the thickness (d) of the sealing liquid part 4 along the axial direction of the sealing ring body 1 accounts for 1 / 30 to 1 / 10 of the thickness (g) of the sealing ring body 1 on the side where the sealing liquid part 4 is located, for example, 1 / 30, 1 / 25, 1 / 20, 1 / 15, or 1 / 10, which can ensure that the sealing liquid part 4 operates when the air pressure is balanced, thereby ensuring the reliability of the operation of the sealing liquid part 4.

[0071] As shown in the figure, Figure 7 and Figure 9 in one embodiment of the present application, the surface of the sealing liquid part 4 facing the air passage 2 is a cut-off surface 5, and the cut-off surface 5 forms a cut-off edge with the bottom surface of the air passage 2 and the side surface of the air passage 2, so that the sealing liquid part 4 is more prone to deformation as a whole, and the sealing liquid part 4 is facilitated to operate as a whole.

[0072] As shown in the figure, Figures 23 to 25 in one embodiment of the present application, the air passage 2 is in an inverted U shape, and the air passage 2 includes a first through groove 16, a second through groove 17, and a sink groove 18. In terms of structural arrangement, the first through groove 16 is located on one side of the sealing ring body 1, the sink groove 18 is located on the other side of the sealing ring body 1, and the second through groove 17 communicates the first through groove 16 and the sink groove 18, thereby forming the inverted U-shaped air passage 2. The bottom of the sink groove 18 is connected to the sealing liquid part 4, and the second through groove 17 is located in the sealing ring body 1 and penetrates the sealing ring body 1 to communicate with the first through groove 16 and the sink groove 18, respectively. When the sealing ring body 1 is located at the joint of the container body and the container cover to play a sealing role, the first through groove 16 communicates with the gas inside or outside the container, and the gas passes through the first through groove 16, the second through groove 17, and the sink groove 18 in turn and is blocked by the sealing liquid part 4. When the pressure difference between the inside and outside of the container is sufficient to push the sealing liquid part 4 along the air passage 2, the sealing liquid part 4 deforms, the gas inside and outside the container communicates, and the air pressure inside and outside the container is balanced.

[0073] The air pressure automatic balancing type sealing ring of the present application can not only seal liquid but also balance the pressure inside and outside the container to prevent the pressure inside the container from being too high or too low. As shown in the figure, Figure 5 and Figure 7 in one embodiment of the present application, the air pressure automatic balancing type sealing ring plays a role in balancing the negative pressure inside the container, which can prevent the negative pressure inside the container from being too large to open the container. Specifically, the sealing ring body 1 is annular and can be sealed between two devices, and the sealing liquid part 4 is located on the inner side of the sealing ring body 1 and can conduct the gas from the air passage under negative pressure. It should be noted that the negative pressure here refers to the negative pressure when the pressure difference between the inside and outside of the container is sufficient to push the sealing liquid part 4 to operate.

[0074] Further, as shown in the figure, Figure 6 and Figure 8As shown, along the axial direction of the sealing ring body 1, the thickness (e) of the inner side of the sealing ring body 1 is greater than the thickness (f) of the outer side of the sealing ring body 1, and the ratio between the thickness of the outer side of the sealing ring body 1 and the thickness of the inner side of the sealing ring body 1 ranges from 1:1.5 to 1:2.5. For example, it can be 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2, 1:2.1, 1:2.2, 1:2.3, 1:2.4, 1:2.5, and the sealing liquid part 4 is located at the inner side of the sealing ring body 1 close to the bottom of the sealing ring body 1. In use, the size of the sealing ring body 1 in the radial direction gradually decreases at the bottom, the inner side of the sealing ring body 1 gradually thins at the bottom of the sealing ring body 1, and the sealing liquid part 4 is located at the thinnest position, which is more likely to act to balance the air pressure inside and outside the container.

[0075] Further, as shown in Figure 6 and Figure 8 , the bottom of the sealing ring body 1 is provided with a groove 6, the cross-sectional profile of the groove 6 is arc-shaped, and the top end is higher than the bottom of the inner side of the sealing ring body 1 and the bottom of the outer side of the sealing ring body 1. When installed on the container, the groove 6 can be in contact with the upper edge of the container body (for example, when applied to a cup, the groove 6 can abut against the cup opening, and when applied to a water-filled heat preservation bowl, it can abut against the bowl edge 10 of the lower bowl body), ensuring the reliability of the sealing.

[0076] Further, as shown in Figure 8 , the inner side of the groove 6 is close to the axis of the sealing ring body 1, and the outer side is far from the axis of the sealing ring body 1, the outer side of the groove 6 is connected with the outer side of the sealing ring body 1, and the sealing ring body 1 will not block the air passage 2 when it is deformed under stress, thereby ensuring that the air passage 2 is always in communication with the outside atmosphere.

[0077] Further, as shown in Figure 8 , the inner side of the groove 6 is connected with the bottom of the sealing ring body 1, which can avoid the container from colliding in the radial direction. The inner side of the groove 6 and the bottom of the sealing ring body 1 are smoothly connected at the joint, which facilitates the assembly and disassembly of the container.

[0078] As shown in Figure 12 and Figure 13 , in one embodiment of the present application, the air pressure automatic balancing type sealing ring plays a role in releasing high pressure in the container, which can prevent the safety hazard caused by excessive high pressure in the container. Specifically, the sealing ring body 1 is annular and can be sealed between two devices, and the sealing liquid part 4 is located on the outer side of the sealing ring body 1 and can conduct gas from the air passage 2 under positive pressure. It is worth noting that the high pressure here refers to the pressure difference between the inside and outside of the container sufficient to drive the sealing liquid part 4 to act.

[0079] Further, as shown in Figures 14 to 16As shown, the thickness (h) of the outer side of the sealing ring body 1 is greater than the thickness (g) of the inner side of the sealing ring body 1 along the axial direction of the sealing ring body 1. The sealing liquid part 4 is located at the outer side of the sealing ring body 1 close to the bottom of the sealing ring body 1. In use, the radial dimension of the sealing ring body 1 gradually decreases at the bottom, the outer side of the sealing ring body 1 gradually thins at the bottom of the sealing ring body 1, and the sealing liquid part 4 is located at the thinnest position, which is more likely to act to balance the air pressure inside and outside the container.

[0080] Further, as shown in Figure 15 and Figure 16 , the bottom of the sealing ring body 1 is provided with a groove 6, the cross-sectional profile of the groove 6 is arc-shaped, and the top end is higher than the bottom of the inner side of the sealing ring body 1 and the bottom of the outer side of the sealing ring body 1. When installed on the container, the groove 6 can be in contact with the upper edge of the container body, ensuring the reliability of the sealing.

[0081] Further, as shown in Figure 15 and Figure 16 , the side close to the axis of the sealing ring body 1 of the groove 6 is the inner side, and the side away from the axis of the sealing ring body 1 is the outer side. The inner side of the groove 6 is connected to the inner side of the sealing ring body 1, and the outer side of the groove 6 is connected to the bottom of the sealing ring body 1. When the sealing ring body 1 is deformed under stress, it will not block the air passage 2. The outer side of the groove 6 and the bottom of the sealing ring body 1 are smoothly connected at the joint, which facilitates the assembly and disassembly of the container.

[0082] As shown in Figure 6 , Figure 8 and Figure 9 , in one embodiment of the present application, the cross-sectional top profile of the sealing ring body 1 is arc-shaped, and smoothly transitions with the inner side profile and the outer side profile of the sealing ring body 1. In use, it is convenient to plug into the container cover, and easy to install.

[0083] As shown in Figure 17 and Figure 18 , in one embodiment of the present application, the sealing ring body 1 is annular and can be sealed between two devices. The sealing ring body 1 includes an integral transverse part and a longitudinal part, the longitudinal part is located below the transverse part, and the sealing liquid part 4 is located on the longitudinal part. The air passage 2 includes a transverse groove and a longitudinal groove connected to each other, the transverse groove is located on the transverse part, and the longitudinal groove is located on the longitudinal part. The bottom of the longitudinal groove is connected to the sealing liquid part 4. Specifically, the distribution of the transverse groove and the longitudinal groove can have multiple forms. One of them, as shown in Figure 18 , the transverse groove is located on the top surface of the transverse part and the longitudinal groove is located on the inner side of the longitudinal part. The second, the transverse groove is located on the bottom surface of the transverse part and the longitudinal groove is located on the outer side of the longitudinal part. The third, as shown in Figure 19As shown, the horizontal groove is located on the top surface of the horizontal part and the vertical groove is located on the inner side of the vertical part, while the horizontal groove is located on the bottom surface of the horizontal part and the vertical groove is located on the outer side of the vertical part. In this embodiment, one end of the horizontal groove is in communication with the gas inside or outside the container, the other end is in communication with one end of the vertical groove, and the other end of the vertical groove is cut off by the sealing liquid part 4. In use, the pressure difference between the inside and outside of the container is applied to the sealing liquid part 4 through the horizontal groove and the vertical groove in turn, and when the pressure difference is sufficient to drive the sealing liquid part 4 to act, the gas flow path is formed between the inside and outside of the container, and the pressure difference is reduced.

[0084] Further, as shown in Figure 18 and Figure 20 , different arrangements of the horizontal part and the vertical part can achieve different functions, such as balancing negative pressure and eliminating high pressure. In one embodiment of the present application, as shown in Figure 18 , the vertical part is connected to the inner side of the horizontal part, the horizontal groove is in communication with the gas outside the container, and the sealing liquid part 4 can guide the gas from the airway 2 to the outside of the container when the container is under negative pressure. It should be noted that the negative pressure here refers to the negative pressure when the pressure difference between the inside and outside of the container is sufficient to drive the sealing liquid part 4 to act. In another embodiment of the present application, as shown in Figure 20 , the vertical part is connected to the outer side of the horizontal part, the horizontal groove is in communication with the gas inside the container, and the sealing liquid part 4 can guide the gas from the airway to the inside of the container when the container is under positive pressure, thereby achieving pressure relief. It should be noted that the positive pressure here refers to the positive pressure when the pressure difference between the inside and outside of the container is sufficient to drive the sealing liquid part 4 to act

[0085] As shown in Figure 21 and Figure 22As shown, in one embodiment of the present application, the sealing ring body 1 is annular and capable of sealing between two devices. Specifically, the sealing ring body 1 comprises an integral transverse portion and longitudinal portion, the middle of the transverse portion is connected with the longitudinal portion, and the liquid sealing portion 4 is located on the transverse portion. The gas channel comprises a first gas groove 13, a second gas groove 11, a third gas groove 12, a first gas gap 15, and a second gas gap 14. The first gas groove 13 and the second gas groove 11 are respectively located at the two ends of the transverse portion, the first gas groove 13 penetrates one end of the transverse portion, the second gas groove 11 is connected with the liquid sealing portion 4, and the third gas groove 12 penetrates the free end of the longitudinal portion. The two sides of the longitudinal portion form the first gas gap 15 and the second gas gap 14 with one of the devices. A gas flow path is sequentially formed by the first gas groove 13, the first gas gap 15, the third gas groove 12, the second gas gap 14, and the second gas groove 11. When the pressure difference between the inside and outside of the container is sufficient to drive the liquid sealing portion 4 to act, a gas passage is formed between the inside and outside of the container, and the pressure difference can be balanced. In this embodiment, as a possible form, the liquid sealing portion 4 can be located on the outside of the sealing ring body 1, which plays a role of high-pressure relief. When the pressure difference between the inside and outside of the container is sufficient to drive the liquid sealing portion 4 to act, a gas passage is formed between the inside and outside of the container, and the gas in the container sequentially passes through the first gas groove 13, the first gas gap 15, the third gas groove 12, the second gas gap 14, and the second gas groove 11, and then pushes away the liquid sealing portion 4 to be discharged to the outside of the container. As shown in Figure 22 , the liquid sealing portion 4 can also be located on the inside of the sealing ring body 1, which plays a role of balancing negative pressure. When the pressure difference between the inside and outside of the container is sufficient to drive the liquid sealing portion 4 to act, a gas passage is formed between the inside and outside of the container, and the gas in the container sequentially passes through the first gas groove 13, the first gas gap 15, the third gas groove 12, the second gas gap 14, and the second gas groove 11, and then pushes away the liquid sealing portion 4 to be discharged to the outside of the container.

[0086] As shown in Figure 9 , Figure 10 and Figure 11 , the following will take the application of the gas pressure automatic balancing type sealing ring to a water injection heat preservation bowl as an example to make a detailed description of the working process of the present application:

[0087] The water injection heat preservation bowl comprises an outer bowl 9 and an inner bowl 7, the inner bowl 7 is detachably installed in the outer bowl 9, and a water storage cavity 8 is formed between the inner bowl 7 and the outer bowl 9. The water storage cavity 8 is used for water injection and heat preservation, and the inner bowl 7 is used for containing food and / or drinks. The inner bowl 7 is provided with an outwardly turned bowl rim 10 at the bowl opening, the bowl rim 10 extends downward after being turned outward, forming a mounting groove, and the gas pressure automatic balancing type sealing ring is mounted in the mounting groove. The liquid sealing portion 4 is located on the side of the sealing ring body 1 that is attached to the inner bowl 7, which can prevent liquid from spilling out.

[0088] When the water injection heat preservation bowl is used for water injection heat preservation, hot water is injected. With the elapse of time, the temperature of the hot water gradually decreases, and the pressure in the water storage cavity 8 also decreases, and is lower than the standard atmospheric pressure, forming a negative pressure. The outside gas can press the sealing liquid part 4 through the air channel 2, and a gap is formed between the sealing liquid part 4 and the outer surface of the inner bowl 7, so that the outside gas can enter the water storage cavity 8, thereby balancing the pressure difference between the water storage cavity 8 and the outside atmospheric pressure, and facilitating the user to take out the inner bowl 7 from the outer bowl 9. If the sealing ring used does not have the air pressure balancing function (the existing sealing ring), due to the fact that the negative pressure in the water storage cavity 8 cannot be balanced, the inner bowl 7 will be sucked on the outer bowl 9 due to the negative pressure effect, and it is not easy to take out or even cannot be taken out.

[0089] From the common technical knowledge, the present application can be realized by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are only examples and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

Claims

1. An air pressure self-balancing type seal ring, characterized by, Comprising: a sealing ring body and an air passage on the sealing ring body; the air passage communicates the inside and outside of the sealing ring body, and is cut off by a sealing liquid part on one side of the sealing ring body; the air passage is used for flowing gas, and the sealing liquid part is used for sealing liquid and balancing air pressure; the air passage is in inverted U shape, and the depth of the air passage at the top of the sealing ring body is greater than the depth of the air passage at the inside and outside of the sealing ring body; on the other side of the sealing liquid part, a flange is arranged on the sealing ring body, and the flange is located on both sides of the air passage; along the axial direction of the sealing ring body, the flange gradually thins from bottom to top until it is flush with the sealing ring body; the sealing liquid part is integrally formed with the sealing ring body; the face of the sealing liquid part towards the air passage is a cut-off face, and the cut-off face forms a cut-off edge with the bottom face of the air passage and the side face of the air passage.

2. The air pressure automatic balancing type sealing ring according to claim 1, wherein: along the width direction of the air passage, the bottom face of the air passage and the side face of the air passage are smoothly connected.

3. The air pressure automatic balancing type sealing ring according to claim 1, wherein: along the axial direction of the sealing ring body, the thickness range of the sealing liquid part accounts for one tenth to one thirtieth of the thickness of the sealing ring body on the side where the sealing liquid part is located.

4. The air pressure automatic balancing type sealing ring according to claim 1, wherein: the air passage is in inverted U shape, and the air passage comprises a first through groove, a second through groove and a sink groove; the first through groove is located on one side of the sealing ring body; the sink groove is located on the other side of the sealing ring body and is connected with the sealing liquid part; the second through groove is located in the sealing ring body, penetrates through the sealing ring body and is connected with the first through groove and the sink groove respectively.

5. The air pressure automatic balancing type sealing ring according to claim 1, wherein: the sealing ring body is annular and is used for sealing between two devices, and the sealing liquid part is located on the inside of the sealing ring body and is used for conducting gas from the air passage under negative pressure.

6. The air pressure automatic balancing type sealing ring according to claim 1, wherein: along the axial direction of the sealing ring body, the thickness of the inside of the sealing ring body is greater than the thickness of the outside of the sealing ring body.

7. The air pressure automatic balancing type sealing ring according to claim 1, wherein: a groove is arranged on the bottom of the sealing ring body, the cross-sectional profile of the groove is arc-shaped, and the top end is higher than the bottom of the inside of the sealing ring body and the bottom of the outside of the sealing ring body; the outside of the groove is connected with the outside of the sealing ring body; the inside of the groove is connected with the bottom of the sealing ring body and is smoothly connected at the connection position.

8. The air pressure automatic balancing type sealing ring according to claim 1, wherein: the sealing ring body is annular and is used for sealing between two devices, and the sealing liquid part is located on the outside of the sealing ring body and is used for conducting gas from the air passage under positive pressure.

9. The air pressure automatic balancing type sealing ring according to claim 1, wherein: The thickness of the sealing ring body outside is greater than the thickness of the sealing ring body inside along the axial direction of the sealing ring body.

10. The air pressure self-balancing sealing ring of claim 1, wherein: the bottom of the sealing ring body is provided with a groove, the cross-sectional profile of the groove is arc-shaped, and the top end is higher than the bottom of the sealing ring body inside and the bottom of the sealing ring body outside; the inside of the groove is connected with the inside of the sealing ring body; the outside of the groove is connected with the bottom of the sealing ring body, and the connection is smooth.

11. The air pressure self-balancing sealing ring of claim 1, wherein: the sealing ring body is annular and used for sealing between two devices, the sealing ring body comprises an integral transverse part and a longitudinal part, the longitudinal part is below the transverse part, and the liquid sealing part is on the longitudinal part; the air passage comprises a transverse groove and a longitudinal groove connected with each other, the transverse groove is on the transverse part, the longitudinal groove is on the longitudinal part, and the bottom of the longitudinal groove is connected with the liquid sealing part; the transverse groove is on the top surface of the transverse part and the longitudinal groove is on the inside of the longitudinal part, and / or the transverse groove is on the bottom surface of the transverse part and the longitudinal groove is on the outside of the longitudinal part.

12. The air pressure self-balancing sealing ring of claim 11, wherein: the longitudinal part is connected with the inside of the transverse part, and the liquid sealing part is used for conducting gas from the air passage under negative pressure; or the longitudinal part is connected with the outside of the transverse part, and the liquid sealing part is used for conducting gas from the air passage under positive pressure.

13. The air pressure self-balancing sealing ring of claim 1, wherein: the sealing ring body is annular and used for sealing between two devices, the sealing ring body comprises an integral transverse part and a longitudinal part, the middle of the transverse part is connected with the longitudinal part, and the liquid sealing part is on the transverse part; the air passage comprises a first air groove, a second air groove, a third air groove, a first air gap and a second air gap; the first air groove and the second air groove are respectively located at two ends of the transverse part, the first air groove penetrates one end of the transverse part, the second air groove is connected with the liquid sealing part, and the third air groove penetrates the free end of the longitudinal part; the two sides of the longitudinal part form the first air gap and the second air gap with one of the devices; a gas flow path is sequentially formed by the first air groove, the first air gap, the third air groove, the second air gap and the second air groove.

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