High-pressure sealing device and sealing assembly

Abstract

The invention provides a high-pressure sealing device. The high-pressure sealing device comprises a groove body, a cover body and a sealing assembly, the tank body is provided with an opening, the cover body is arranged at the opening, and an accommodating space is defined after the cover body and the tank body are combined and is used for accommodating high-pressure fluid. The sealing assembly is arranged between the groove body and the cover body and comprises two ring bodies, one ring body is provided with a first conical surface and a first abutting wall face adjacent to the first conical surface, the other ring body is provided with a second conical surface and a second abutting wall face adjacent to the second conical surface, and the two ring bodies are stacked in the axial direction of the sealing assembly so that the first conical surface and the second conical surface can be embedded. When the second ring body is subjected to pressure from the accommodating space, the second ring body is deformed due to mutual extrusion of the first conical surface and the second conical surface, so that the first abutting wall surface and the second abutting wall surface abut against the groove body and the cover body respectively. The high-pressure sealing device and the sealing assembly are particularly suitable for low operation temperature and wide operation temperature range.

Description

Technical Field

[0001] The present invention relates to a high-pressure sealing device and a sealing component, and in particular to a high-pressure sealing device and a sealing component applicable to low temperatures and a wider temperature range. Background Art

[0002] In order to prevent leakage of the fluid stored in the general high-pressure sealing device, a sealing element is usually provided between the tank body and the cover body to ensure that no leakage occurs at the joint between the tank body and the cover body.

[0003] Taiwan Patent No. TW I673448B discloses a high-pressure sealing device, which includes a sealing ring installed on the container cover and tightly against the inner wall of the container body. The sealing ring is elastic and the ring cross-section is roughly U-shaped. Through the elasticity brought by the material characteristics and the U-shaped structure, when the inner wall and the outer wall are pushed inward, they will be stretched outward due to their own elastic force, so that the inner wall and the outer wall are respectively tightly against the container cover and the container body, achieving a high sealing effect.

[0004] When this high-pressure sealing device contains a low-temperature high-pressure fluid, the sealing ring will shrink due to the low temperature. Although the pressure inside the container will still cause the outer wall of the sealing ring to expand outward, the outer wall can no longer be tightly pressed against the inner wall of the container as at normal or high temperature, causing leakage.

[0005] Chinese patent number CN 209856366 U discloses a pressure vessel sealing structure, wherein the outer periphery of the sealing ring is provided with a first conical surface, the first conical surface is provided with an annular notch, a metal ring is provided on the annular notch, and the sealing ring is pressed against the conical section by a pressing block, so that the metal ring abuts against the conical section. The pressing block applies downward pressure to the sealing ring, so that the metal ring is plastically deformed, thereby reliably sealing the inside of the cylinder.

[0006] When this pressure vessel sealing structure is used in low temperature occasions, the low temperature sealing effect can also be achieved according to the above principle. When the pressure vessel returns to room temperature, the cylinder, sealing ring and metal ring will expand as the temperature rises, which will cause the cylinder and the sealing ring (metal ring) to be more tightly pressed against each other and unable to be separated.

[0007] US Patent No. 4865331 discloses a Differential temperature seal, the seal includes a groove surrounding the inner surface of the lower container portion and a protrusion formed on and surrounding the outer surface of the retractable lip, the protrusion being adapted to fit tightly into the groove. In addition, another groove surrounds the inner surface of the retractable lip, radially opposite to the protrusion. A ring is installed in the groove. The ring is not continuous, but has a slight gap in it. The groove, protrusion and groove are all components made of the same material, a fluorocarbon polymer, and their shrinking speed is basically the same. The ring is made of a metal with a smaller thermal shrinkage coefficient than the fluorocarbon polymer. As the temperature decreases to the low temperature range, the lower container and the retractable lip will shrink relative to each other and cause the ring to be radially compressed, but the ring will not shrink as much as the fluorocarbon polymer component. Therefore, the lower container and the retractable lip will compress the ring until the gap is closed. After the gap is closed, the ring can only be slightly compressed by the relative contraction of the lower container and the retractable lip. At this point, the protrusions will elastically compress into the grooves, forming a tight sealing contact with their sides. To separate the upper container part from the lower container part, just let them return to normal temperature and gently pull the upper container part enough to separate the protrusions from the grooves.

[0008] As mentioned in the description of this case: Since the inner surface will directly contact the cryogenic fluid, the retractable lip and the protrusion it supports will shrink slightly more than the groove. Therefore, even if the ring can provide radial pressure to push the protrusion toward the groove, the protrusion and the groove will still be difficult to fit closely due to the different shrinkage degrees, and there is a concern of leakage.

[0009] The above-mentioned prior art often has the problem of poor sealing when used to accommodate low-temperature high-pressure fluids, or when returning to room temperature, the cylinder and the sealing ring are pressed against each other and cannot be separated. Therefore, how to find a high-pressure sealing solution suitable for lower operating temperatures and a wider operating temperature range has become one of the issues that people in this technical field are eager to solve. Summary of the invention

[0010] The object of the present invention is to provide a high pressure sealing device and a sealing assembly suitable for lower operating temperatures.

[0011] Another object of the present invention is to provide a high pressure sealing device and a sealing assembly suitable for a wider operating temperature range.

[0012] According to the above-mentioned purpose, the present invention provides a sealing assembly for being arranged between a groove body and a cover body of a high-pressure sealing device, the sealing assembly comprising: two ring bodies, one of which has a first conical surface and a first abutting wall surface adjacent to the first conical surface, and the other ring body has a second conical surface and a second abutting wall surface adjacent to the second conical surface, the two ring bodies are axially stacked so that the first conical surface and the second conical surface are embedded; when the two ring bodies are subjected to pressure from the inside of the high-pressure sealing device, the two ring bodies are deformed by the mutual squeezing of the first conical surface and the second conical surface, so that the first abutting wall surface and the second abutting wall surface respectively abut against the groove body and the cover body.

[0013] As a sealing component of the present invention, one of the first conical surface and the second conical surface is an inner concave conical surface, and the other is an outer convex conical surface.

[0014] As a sealing component of the present invention, the first cone surface has a first cone angle, the second cone surface has a second cone angle, and the angle range between the first cone angle and the second cone angle is greater than or equal to 60 degrees and less than or equal to 160 degrees.

[0015] As a sealing component of the present invention, the size change of the two ring bodies caused by heat transfer can be compensated by the deformation of the two ring bodies to maintain the sealing effect.

[0016] According to the above-mentioned purpose, the present invention provides a high-pressure sealing device, comprising: a groove body, which has an opening; a cover body, which is arranged at the opening, and the cover body and the groove body are combined to define a accommodating space for accommodating a high-pressure fluid; and a sealing assembly, which is arranged between the groove body and the cover body, comprising: two ring bodies, one of which has a first conical surface and a first abutting wall surface adjacent to the first conical surface, and the other ring body has a second conical surface and a second abutting wall surface adjacent to the second conical surface, and the two ring bodies are stacked along their axial direction so that the first conical surface and the second conical surface are embedded; when the two ring bodies are subjected to pressure from the accommodating space, the two ring bodies are deformed by the mutual squeezing of the first conical surface and the second conical surface, so that the first abutting wall surface and the second abutting wall surface respectively press against the groove body and the cover body.

[0017] As a high-pressure sealing device of the present invention, the lower end of the main body of the cover body is provided with an assembly part for installing the sealing component. The diameter of the assembly part is smaller than the diameter of the main body and is in a stepped shape. The two ring bodies are sequentially inserted into the assembly part.

[0018] As a kind of high-pressure sealing device of the present invention, when the two ring bodies are subjected to the pressure, the two ring bodies are squeezed in the axial direction, one ring body shrinks and deforms in the radial direction, and the other ring body expands and deforms in the radial direction, thereby causing the first abutting wall surface and the second abutting wall surface to respectively abut the groove body and the cover body.

[0019] As a high-pressure sealing device of the present invention, an annular groove is provided on the end surface of the groove wall of the groove body, the annular groove surrounds the opening and is located outside the opening, and the two ring bodies are sequentially stacked in the annular groove.

[0020] As a kind of high-pressure sealing device of the present invention, when the two ring bodies are subjected to the pressure, the two ring bodies are squeezed in the radial direction and expand and deform in the axial direction, thereby making the two abutting walls respectively abut the groove body and the cover body.

[0021] As a kind of high pressure sealing device of the present invention, the size change of the two ring bodies caused by heat transfer can be compensated by the deformation of the two ring bodies to maintain the sealing effect.

[0022] The high-pressure sealing device of the present invention includes a tank body, a cover body and a sealing assembly, and the sealing assembly includes two interlocking ring bodies, which are arranged between the tank body and the cover body. The high-pressure sealing device and the sealing assembly of the present invention have the advantages of simple structure, low cost and easy installation. The pressure from the tank body accommodating space causes the two ring bodies of the sealing assembly to press against each other and deform, and the pressing walls of the two ring bodies can thus press against the tank body and the cover body to achieve the effect of high-pressure sealing. When the fluid stored in the high-pressure sealing device is a low-temperature or high-temperature fluid, the size of the two ring bodies will change due to the influence of heat transfer, and this change can be compensated by the deformation of the two ring bodies, and the high-pressure sealing effect can still be maintained. Therefore, the high-pressure sealing device and the sealing assembly of the present invention are particularly suitable for lower operating temperatures and a wider operating temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view and a partial enlarged view of the first embodiment of the high-pressure sealing device.

[0024] Figure 2 It is a cross-sectional view of the first ring body and the second ring body of the first embodiment.

[0025] Figure 3 It is a schematic diagram of the sealing assembly of the first embodiment being subjected to high pressure.

[0026] Figure 4 It is a cross-sectional view of another implementation manner of the sealing assembly of the first embodiment.

[0027] Figure 5 It is a cross-sectional view and a partial enlarged view of the second embodiment of the high-pressure sealing device.

[0028] Figure 6 It is a schematic diagram of the sealing assembly of the second embodiment being subjected to high pressure.

[0029] Figure 7 FIG. 4 is a cross-sectional view of another implementation manner of the sealing assembly of the second embodiment.

[0030] In the figure: 1,1': High pressure sealing device 10,10': Tank 11,11': Opening 12,12': Accommodation space 13': Groove wall 131': End face 132': Ring groove 1321': Bottom 1322': First side wall 1323': Second side wall 20,20': Cover 21:Ontology 211: Organization Department 2111: Bottom 2112:Elevation 30,30',40,50: Sealing components 31,31',41,51: First ring 311,311',411,511: first cone 312,312',412,512: Base ring 313, 313', 413, 513: first abutting wall surface 32,32',42,52: Second ring 321,321',421,521: Second cone 322,322',422,522: Pressure ring 3221: Concave arc surface 323, 323', 423, 523: Second abutting wall surface P: Pressure θ1: first cone angle θ2: second cone angle. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0033] Figure 1 It is a cross-sectional view and a partial enlarged view of the first embodiment of the high-pressure sealing device. Figure 2 2 is a cross-sectional view of the first ring body and the second ring body of the first embodiment. Figure 1 and Figure 2 The high pressure sealing device 1 disclosed in the first embodiment includes a tank body 10 , a cover body 20 and a sealing assembly 30 .

[0034] The tank 10 is generally barrel-shaped and has an opening 11. The cover 20 is provided at the opening 11 to close the opening 11. The cover 20 and the tank 10 are combined to define a receiving space 12 for receiving a high-pressure fluid (not shown). The pressure of the high-pressure fluid is between 200 and 900 bar. The cover 20 of this embodiment has a body 21, and at least a part of the circumference of the body 21 is provided with threads (see Figure 1 ), which can be screwed together with the thread on the inner side of the opening 11 of the tank body 10, and the combination of the cover body 20 and the tank body 10 is not limited to this. The lower end of the body 21 of the cover body 20 is provided with an assembly portion 211 for mounting the sealing assembly 30. The diameter of the assembly portion 211 is smaller than the diameter of the body 21 and is in a stepped shape. The assembly portion 211 includes a bottom surface 2111 and a vertical surface 2112 perpendicular to the bottom surface 2111.

[0035] The sealing assembly 30 includes a first ring body 31 and a second ring body 32. The first ring body 31 has a first conical surface 311, a base ring surface 312 opposite to the first conical surface 311, and a first abutting wall surface 313 adjacent to the first conical surface 311. The second ring body 32 has a second conical surface 321, a pressure ring surface 322 opposite to the second conical surface 321, and a second abutting wall surface 323 adjacent to the second conical surface 321. In this embodiment, the first conical surface 311 is an inner concave conical surface, and the second conical surface 321 is an outer convex conical surface, so that the first ring body 31 and the second ring body 32 can be conically embedded.

[0036] Figure 1 and Figure 2The pressure ring surface 322 of the second ring body 32 shown has an inner concave arc surface 3221, which can cause radial deformation (the legs on both sides of the inner concave arc surface 3221) when the pressure ring surface 322 of the second ring body 32 is subjected to pressure, thereby increasing the contact with the cover body 20 and the groove body 10. However, the implementation of the present invention is not limited to this, and the pressure ring surface 322 can also be a plane.

[0037] See also Figure 2 The first cone surface 311 has a first cone angle θ1, and the second cone surface 321 has a second cone angle θ2. Figure 2 Shown is one-half of the first cone angle θ1 and the second cone angle θ2. Preferably, the angle range of the first cone angle θ1 is greater than or equal to 60 degrees to less than or equal to 160 degrees, and the angle range of the second cone angle θ2 is greater than or equal to 60 degrees to less than or equal to 160 degrees. By selecting the angles of the first cone angle θ1 and the second cone angle θ2, the deformation amount of the first ring body 31 and the second ring body 32 after being compressed can be changed. Preferably, the first cone angle θ1 and the second cone angle θ2 are the same. In one embodiment, the first cone angle θ1 and the second cone angle θ2 are both 135 degrees. In another embodiment, the first cone angle θ1 and the second cone angle θ2 are both 150 degrees. When the first cone angle θ1 and the second cone angle θ1 select different angles, the angle difference between the two is preferably within 5 degrees.

[0038] The materials used to make the first ring body 31 and the second ring body 32 can be the same or different. The materials used to make the first ring body 31 and the second ring body 32 can be selected from pure Teflon, Teflon composite material, UHME-PE or Ultragold.

[0039] Please refer to Figure 1 Before the cover 20 and the tank 10 are assembled, the first ring body 31 and the second ring body 32 are first sequentially inserted into the assembly part 211 at the lower end of the cover 20, and axially overlapped along the central axis of the cover 20, so that the base annular surface 312 of the first ring body 31 abuts against the bottom surface 2111 of the assembly part 211, and the first conical surface 311 and the second conical surface 321 of the second ring body 32 are engaged. In this embodiment, since the sealing component 30 is disposed at the assembly part 211 at the lower end of the cover 20, when the cover 20 and the tank 10 are assembled, the sealing component 30 will extend into the opening 11 and be located in the opening 11, and on the upper side of the accommodating space 12, and the sealing component 30 is located between the tank 10 and the cover 20.

[0040] Figure 3 This is a schematic diagram of the sealing assembly of the first embodiment under high pressure. Please refer to Figure 1 and Figure 3When the high-pressure sealing device 1 is filled with a normal-temperature high-pressure fluid, when the pressure ring surface 322 of the second ring body 32 is subjected to the pressure P from the accommodating space 12, the second ring body 32 will move axially along the central axis of the cover body 20 (that is, the central axis of the second ring body 32), and the second conical surface 321 of the second ring body 32 will push against the first conical surface 311 of the first ring body 31, so that the first ring body 31 expands and deforms along its radial direction, and the second ring body 32 shrinks and deforms along its radial direction, thereby making the first abutting wall surface 313 and the second abutting wall surface 323 respectively abut against the inner wall of the groove body 10 and the vertical surface 2112 of the assembly portion 211 of the cover body 20, thereby achieving a high-pressure sealing effect.

[0041] Figure 3 After the first ring body 31 and the second ring body 32 are subjected to the pressure P, the first abutting wall surface 313 and the second abutting wall surface 323 respectively abut the tank body 10 and the cover body 20, while the inner ring surface relative to the first abutting wall surface 313 and the outer ring surface relative to the second abutting wall surface 323 are not in contact with the cover body 20 and the tank body 10, respectively. This drawing method mainly represents the mechanical trend of the two ring bodies 31 and 32 after being subjected to the pressure P. In practice, by selecting the sizes of the two ring bodies 31 and 32, the inner ring surface and the outer ring surface can respectively abut the cover body 20 and the tank body 10.

[0042] Please also refer to Figure 1 and Figure 3 When the high-pressure fluid is a low-temperature fluid, for example, its temperature is -50°C, after being subjected to heat transfer from the low-temperature fluid, the first ring body 31 and the second ring body 32 will shrink due to the cold and tighten the assembly portion 211 of the cover body 20, and a gap may be formed on this side of the inner wall of the tank body 10. However, by making the radial expansion deformation of the first ring body 31 caused by the pressure P greater than the radial contraction of the first ring body 31 caused by the low temperature, the first abutting wall surface 313 can still be tightly against the inner wall of the tank body 10, thereby achieving a low-temperature and high-pressure sealing effect.

[0043] Please also refer to Figure 1 and Figure 3 When the high-pressure fluid is a high-temperature fluid, for example, its temperature is 250°C, after being subjected to heat transfer from the high-temperature fluid, the first ring body 31 and the second ring body 32 will expand due to the heat, and it is easy to form a gap between the assembly portion 211 of the cover body 20. Relatively, the first abutting wall surface 313 of the first ring body 31 will more tightly abut the inner wall of the tank body 10. However, by making the radial contraction deformation caused by the pressure P on the second ring body 32 greater than the radial gap formed by the second ring body 32 due to thermal expansion, the sealing effect of high temperature and high pressure can also be achieved.

[0044] See also Figure 1In the first embodiment, the first conical surface 311 of the first ring body 31 is an inner concave conical surface, and the second conical surface 321 of the second ring body 32 is an outer convex conical surface. However, the implementation of the present invention is not limited thereto. Figure 4 FIG. 2 is a cross-sectional view of another embodiment of the sealing assembly of the first embodiment. Figure 4 The sealing assembly 40 includes a first ring body 41 and a second ring body 42. The first ring body 41 has a first conical surface 411, a base ring surface 412 opposite to the first conical surface 411, and a first abutting wall surface 413 adjacent to the first conical surface 414. The second ring body 42 has a second conical surface 421, a pressure ring surface 422 opposite to the second conical surface 421, and a second abutting wall surface 423 adjacent to the second conical surface 421. The first ring body 41 and the second ring body 42 are overlapped along the axial direction so that the first conical surface 411 and the second conical surface 421 are embedded. In this example, the first conical surface 411 is an outer convex conical surface, and the second conical surface 421 is an inner concave conical surface.

[0045] Please also read Figure 1 and Figure 4 Similarly, the sealing assembly 40 can be assembled as follows Figure 1 In the assembly part 211 of the cover body 20, when the pressure ring surface 422 of the second ring body 42 is subjected to the pressure P from the accommodating space 12, the second ring body 42 will move axially along the central axis of the cover body 20, and the second conical surface 421 of the second ring body 42 will push and press against the first conical surface 411 of the first ring body 41, so that the first ring body 41 contracts and deforms along its radial direction, and the second ring body 42 expands and deforms along its radial direction, thereby making the first abutting wall surface 413 and the second abutting wall surface 423 press against the vertical surface 2112 of the assembly part 211 of the cover body 20 and the inner wall of the groove body 10 respectively, and the same high-pressure sealing effect can be achieved.

[0046] Figure 5 The cross-sectional view and partial enlarged view of the second embodiment of the high pressure sealing device are shown in FIG. Figure 5 The high-pressure sealing device 1' disclosed in the second embodiment also includes a tank body 10', a cover body 20' and a sealing assembly 30'. An annular groove 132' is formed on the end surface 131' of the tank wall 13' of the tank body 10'. The annular groove 132' surrounds the opening 11' and is located outside the opening 11'. The annular groove 132' has a bottom surface 1321', a first side wall 1322' and a second side wall 1323'. The sealing assembly 30' is disposed in the annular groove 132'.

[0047] The sealing assembly 30' comprises a first ring body 31' and a second ring body 32'. The first ring body 31' has a first conical surface 311', a base ring surface 312' opposite to the first conical surface 311', and a first abutting wall surface 313' adjacent to the first conical surface 311'. The second ring body 32' has a second conical surface 321', a pressure ring surface 322' opposite to the second conical surface 321', and a second abutting wall surface 323' adjacent to the second conical surface 321'. In this embodiment, the first conical surface 311' is an outer convex conical surface, and the second conical surface 321' is an inner concave conical surface.

[0048] Please refer to Figure 5 Before the cover 20' is assembled with the tank 10', the first ring 31' and the second ring 32' are placed in the ring groove 132' in sequence, the base ring surface 312' of the first ring 31' abuts against the first side wall 1322' of the ring groove 132', the first abutting wall surface 313' contacts the bottom surface 1321' of the ring groove 132', and the first conical surface 311' of the first ring 31' and the second conical surface 321' of the second ring 32' are engaged. Then, the cover 20' is assembled with the tank 10'.

[0049] Figure 6 This is a schematic diagram of the sealing assembly of the second embodiment under high pressure. Please refer to Figure 5 and Figure 6 When the high-pressure sealing device 1' is filled with a high-pressure fluid, when the pressure ring surface 322' of the second ring body 32' is subjected to the pressure P from the accommodating space 12' (leakage), the second ring body 32' will expand in its own radial direction, and its second conical surface 321' will push and press against the first conical surface 311' of the first ring body 31'. Both are squeezed in the radial direction and expand and deform along their axial and circumferential directions, so that the first abutting wall surface 313' of the first ring body 31' and the second abutting wall surface 323' of the second ring body 32' respectively press against the bottom surface 1321' (i.e., the groove body 10') and the cover body 20' of the annular groove 132', thereby achieving a high-pressure sealing effect.

[0050] Please also refer to Figure 5 and Figure 6 When the high-pressure fluid is a low-temperature fluid, after the heat transfer from the low-temperature fluid, the first ring body 31' and the second ring body 32' will shrink due to the cold, and a gap may be formed on the side of the cover body 20'. However, the pressure P continues to press the second ring body 32' and push the first ring body 31' at the same time, so that both of them can expand and deform along their axial and circumferential directions, and the expansion deformation is greater than the contraction of the first ring body 31' and the second ring body 32' caused by the low temperature, so that the first abutting wall surface 313' of the first ring body 31' and the second abutting wall surface 323' of the second ring body 32' can respectively press against the groove body 10' and the cover body 20', thereby achieving the effect of low-temperature and high-pressure sealing.

[0051] Please also refer to Figure 5 and Figure 6 When the high-pressure fluid is a high-temperature fluid, after being subjected to heat transfer from the high-temperature fluid, the first ring body 31' and the second ring body 32' will expand in the radial, circumferential and axial directions due to the heat, which can achieve a better high-pressure sealing effect.

[0052] Figure 7 FIG. 2 is a cross-sectional view of another embodiment of the sealing assembly of the second embodiment. Figure 7 The sealing assembly 50 includes a first ring body 51 and a second ring body 52. ​​The first ring body 51 has a first conical surface 511, a base ring surface 512 opposite to the first conical surface 511, and a first abutting wall surface 513 adjacent to the first conical surface 511. The second ring body 52 has a second conical surface 521, a pressure ring surface 522 opposite to the second conical surface 521, and a second abutting wall surface 523 adjacent to the second conical surface 521. The first ring body 51 and the second ring body 52 are overlapped along the axial direction so that the first conical surface 511 and the second conical surface 521 are embedded. In this embodiment, the first conical surface 511 is an inner concave conical surface, and the second conical surface 521 is an outer convex conical surface.

[0053] Please also read Figure 5 and Figure 7 Similarly, the sealing assembly 50 can be assembled as follows Figure 5 When the pressure annular surface 522 of the second ring body 52 is subjected to the pressure P from the accommodating space 12', the second ring body 52 will expand in its own radial direction, and its second conical surface 521 will push and tightly abut against the first conical surface 511 of the first ring body 51. Both are squeezed in the radial direction and expand and deform in the axial and circumferential directions, so that the first abutting wall surface 513 of the first ring body 51 and the second abutting wall surface 523 of the second ring body 52 respectively abut against the cover body 20' and the bottom surface 1321' (i.e., the groove body 10') of the annular groove 132', thereby achieving a high-pressure sealing effect.

[0054] The high-pressure sealing device of the present invention comprises a tank body, a cover body and a sealing assembly, wherein the sealing assembly comprises two interlocking ring bodies, which are arranged between the tank body and the cover body. The high-pressure sealing device and the sealing assembly of the present invention have the advantages of simple structure, low cost and easy installation. The pressure from the tank body accommodating space causes the two ring bodies of the sealing assembly to deform, so that the two ring bodies can press against the tank body and the cover body to achieve the effect of high-pressure sealing. When the fluid stored in the high-pressure sealing device is a low-temperature or high-temperature fluid, the size of the two ring bodies will change due to the influence of heat transfer, and this change can be compensated by the deformation of the two ring bodies, and the effect of high-pressure sealing can still be maintained. Therefore, the high-pressure sealing device and the sealing assembly of the present invention are particularly suitable for lower operating temperatures and a wider operating temperature range.

[0055] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A sealing assembly, arranged between a groove and a cover of a high pressure sealing device, characterized in that: The sealing assembly includes: Two ring bodies, one of which has a first conical surface and a first abutting wall surface adjacent to the first conical surface, and the other ring body has a second conical surface and a second abutting wall surface adjacent to the second conical surface, and the two ring bodies are axially stacked so that the first conical surface and the second conical surface are embedded; When the two ring bodies are subjected to a pressure from the high-pressure sealing device, the two ring bodies are deformed by the mutual squeezing of the first conical surface and the second conical surface, so that the first abutting wall surface and the second abutting wall surface respectively abut against the groove body and the cover body.

2. The sealing assembly according to claim 1, characterized in that: One of the first conical surface and the second conical surface is an inner concave conical surface, and the other is an outer convex conical surface.

3. The sealing assembly according to claim 1, characterized in that: The first cone surface has a first cone angle, and the second cone surface has a second cone angle. The angle range between the first cone angle and the second cone angle is greater than or equal to 60 degrees and less than or equal to 160 degrees.

4. The sealing assembly according to claim 1, characterized in that: The size change of the two ring bodies caused by heat transfer can be compensated by the deformation of the two ring bodies to maintain the sealing effect.

5. A high pressure sealing device, characterized in that: include: A tank body having an opening; A cover body is provided at the opening, and the cover body and the groove body are combined to define a containing space for containing a high-pressure fluid; as well as A sealing assembly, disposed between the tank body and the cover body, comprising: Two ring bodies, one of which has a first conical surface and a first abutting wall surface adjacent to the first conical surface, and the other ring body has a second conical surface and a second abutting wall surface adjacent to the second conical surface, and the two ring bodies are stacked along their axial direction so that the first conical surface and the second conical surface are embedded; When the two ring bodies are subjected to a pressure from the accommodating space, the two ring bodies are deformed by the mutual compression of the first conical surface and the second conical surface, so that the first abutting wall surface and the second abutting wall surface respectively abut against the groove body and the cover body.

6. The high pressure sealing device as claimed in claim 5, characterized in that: The lower end of the main body of the cover body is provided with an assembly part for installing the sealing component. The diameter of the assembly part is smaller than the diameter of the main body and is in a stepped shape. The two ring bodies are sequentially inserted into the assembly part.

7. The high pressure sealing device as claimed in claim 6, characterized in that: When the two ring bodies are subjected to the pressure, the two ring bodies are squeezed axially, one ring body contracts and deforms radially, and the other ring body expands and deforms radially, thereby causing the first abutting wall surface and the second abutting wall surface to respectively abut against the groove body and the cover body.

8. The high pressure sealing device as claimed in claim 5, characterized in that: An annular groove is formed on the end surface of the groove wall of the groove body. The annular groove surrounds the opening and is located outside the opening. The two ring bodies are sequentially stacked in the annular groove.

9. The high pressure sealing device as claimed in claim 8, characterized in that: When the two ring bodies are subjected to the pressure, the two ring bodies are squeezed in the radial direction and expand and deform in the axial direction, so that the two abutting wall surfaces abut against the groove body and the cover body respectively.

10. The high pressure sealing device as claimed in claim 5, characterized in that: The size change of the two ring bodies caused by heat transfer can be compensated by the deformation of the two ring bodies to maintain the sealing effect.

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