Ultrahigh-pressure metal sealing ring gasket

Abstract

The utility model discloses an ultrahigh pressure metal sealing ring gasket which comprises a ring gasket body, the upper side and the lower side of an inner ring of the ring gasket body are inclined faces, two pressure discharge grooves are symmetrically formed in the ring gasket body, and the pressure discharge grooves are communicated with the end face and the inner side of the ring gasket body. The utility model has the advantages that the water pressure in the sealing groove can be discharged, so that the underwater installation is not easy to shift, the sealing performance is increased, and the disassembly and replacement are easy.

Description

Technical Field

[0001] The utility model relates to the field of ultra-high pressure metal sealing gaskets, in particular to an ultra-high pressure metal sealing ring gasket. Background Art

[0002] Metal sealing ring gaskets are suitable for underwater ultra-high pressure valves, underwater wellhead connection devices and underwater oil production tree sealing parts. The sealing principle is that the sealing surface of the ring gasket is plastically deformed by the tightening and extrusion pressure of the upper and lower sealing groove sealing surfaces to form a face seal. However, due to the working conditions that require underwater maintenance and installation, the traditional octagonal gasket has no pressure discharge groove. Therefore, when replacing the ring gasket, the water resistance in the sealing groove makes it difficult to align the traditional octagonal gasket with the sealing groove. Moreover, when the upper and lower flanges are closed and tightened, the water pressure in the upper and lower sealing grooves cannot be discharged, which easily causes the ring gasket to move and deform in place, affecting the sealing effect. In addition, when disassembling, the connection position with the sealing groove is locked due to the closed pressure and cannot be removed. Therefore, there is room for improvement. Utility Model Content

[0003] The purpose of the present invention is to provide an ultra-high pressure metal sealing ring gasket to solve the problems raised in the above-mentioned background technology. The ultra-high pressure metal sealing ring gasket has the advantages of being able to discharge the water pressure in the sealing groove so that it is not easy to shift during underwater installation, increasing the sealing performance and being easy to disassemble and replace.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an ultra-high pressure metal sealing ring gasket, comprising a ring gasket, the upper and lower sides of the inner ring of which are arranged as inclined surfaces, the ring gasket being symmetrically provided with two pressure discharge grooves, and the pressure discharge grooves being connected to the end face and the inner side of the ring gasket.

[0005] By adopting the above technical solution, in the traditional ultra-high pressure metal sealing gasket, a pressure relief groove is added to the octagonal gasket type, so that the sealing groove has a pressure relief function. The water in the sealing groove can be discharged through the pressure relief groove when the ring gasket is installed, so as to avoid the poor sealing effect caused by the displacement of the ring gasket during underwater maintenance and replacement and insufficient tightening deformation. At the same time, during removal, the connection between the ring gasket and the sealing groove is prevented from being locked due to the closed pressure and unable to be removed. The design of the pressure relief groove of the ring gasket solves the problem of easy displacement of the ring gasket during underwater installation. Moreover, since the bolts can be tightened in place after the pressure in the sealing groove is relieved, the sealing surface of the ring gasket will produce sufficient plastic deformation after being subjected to force, thereby greatly improving the sealing effect of the ring gasket. It is also easier and more convenient to remove it by hand during maintenance and replacement, avoiding damage to the flange sealing surface and other important parts that may be easily caused by disassembly using tools. In actual application, when the inner diameter of the ring gasket is subjected to high pressure, the sealing surface of the outer bevel of the ring gasket will produce a pressure self-sealing function, which further ensures the sealing effect.

[0006] Preferably, flanges are provided on both sides of the ring gasket, and the flanges are provided with sealing grooves for accommodating the ring gasket, and the ring gasket is located in the two sealing grooves.

[0007] As a further solution of the present invention: the sealing groove is arranged in a ladder shape and the area from the groove bottom to the groove mouth increases continuously.

[0008] By adopting the above technical solution, the ring gasket can be better placed in the sealing groove.

[0009] As a further solution of the present invention: the pressure discharge groove is configured as an inclined groove, and when the ring gasket is in the sealing groove, the pressure discharge groove communicates with the inner diameter space of the sealing groove and the ring gasket.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. A pressure relief groove is added to the octagonal gasket of the traditional ultra-high pressure metal gasket, so that the sealing groove has a pressure relief function. The water in the sealing groove can be discharged through the pressure relief groove when the ring gasket is installed, so as to avoid the poor sealing effect caused by the displacement of the ring gasket during underwater maintenance and replacement and insufficient tightening deformation. At the same time, during disassembly, the connection between the ring gasket and the sealing groove is prevented from being locked due to the closed pressure and unable to be removed. The design of the pressure relief groove of the ring gasket solves the problem of easy displacement of the ring gasket during underwater installation. Moreover, since the bolts can be tightened in place after the pressure in the sealing groove is discharged, the sealing surface of the ring gasket produces sufficient plastic deformation after being stressed, thereby greatly improving the sealing effect of the ring gasket. It is also easier and more convenient to disassemble by hand during maintenance and replacement, avoiding damage to the flange sealing surface and other important parts caused by disassembly with tools;

[0012] 2. During underwater installation, the pressure relief groove of the ring gasket can discharge the pressure in the sealing groove, making it easier to align the sealing groove during installation;

[0013] 3. The design of the pressure relief groove allows the pressure in the flange groove to be discharged when the flange is subjected to tightening force, thus achieving the best tightening effect;

[0014] 4. Solved the problem that the connection between the ring gasket and the sealing groove was locked due to the closed pressure during disassembly and could not be removed;

[0015] 5. It has pressure self-sealing function, that is, in actual application, when the inner diameter of the ring gasket is subjected to high pressure, the sealing surface of the outer inclined surface of the ring gasket will produce pressure self-sealing function, which better ensures the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment;

[0017] Figure 2 for Figure 1A partial enlarged view of area A in the middle;

[0018] Figure 3 for Figure 2 A partial enlarged view of the middle B area;

[0019] Figure 4 Schematic diagram of the structure of the ring gasket in the embodiment;

[0020] Figure 5 2 is a cross-sectional view of the ring gasket in the embodiment.

[0021] In the figure: 1. Ring gasket; 2. Inclined surface; 3. Pressure relief groove; 4. Flange; 5. Sealing groove; 6. Inner diameter space; 7. Sealing part. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the embodiment of the present utility model,

[0024] An ultra-high pressure metal sealing ring gasket, such as Figure 1-Figure 5 As shown, it includes a ring gasket 1, the upper and lower sides of the inner ring of the ring gasket 1 are set as inclined surfaces 2, and the ring gasket 1 is symmetrically provided with two pressure discharge grooves 3, which are connected to the end face and the inner side of the ring gasket 1.

[0025] Flanges 4 are provided on both sides of the ring gasket 1 . The flanges 4 are provided with sealing grooves 5 for accommodating the ring gasket 1 . The ring gasket 1 is located in the two sealing grooves 5 .

[0026] The sealing groove 5 is arranged in a ladder shape, and the area from the bottom of the groove to the groove mouth increases continuously.

[0027] The pressure relief groove 3 is configured as an oblique groove. When the ring gasket 1 is in the sealing groove 5 , the pressure relief groove 3 communicates with the sealing groove 5 and the inner diameter space 6 of the ring gasket 1 .

[0028] The ring gasket 1 forms a sealing portion 7 with the groove wall of the sealing groove 5 .

[0029] Ring gasket 1 is an ultra-high pressure metal sealing gasket and is used in ultra-high pressure environments. The specific parameters of ring gasket 1 are as follows:

[0030] Maximum design pressure: 138MPa

[0031] Sealing surface angle: 23°±15′

[0032] Sealing part: Ring gasket 1 is 23° and outer diameter is bevel 2

[0033] Pressure relief part: Ring gasket 1 has a 23° inner diameter bevel groove

[0034] Sealing surface roughness: Ra≤0.8um

[0035] Ring gasket 1 hardness design: Ring gasket 1 hardness should be lower than sealing groove 5 hardness

[0036] Surface treatment: Depending on the working medium, pressure, temperature and the material of the ring gasket 1, suitable surface treatment processes such as silver plating, molybdenum disulfide coating, and PTFE coating can be selected.

[0037] Working principle:

[0038] The pressure relief groove 3 is added to the octagonal gasket in the traditional ultra-high pressure metal sealing gasket, so that the sealing groove 5 has a pressure relief function. The water in the sealing groove 5 can be discharged through the pressure relief groove 3 when the ring gasket 1 is installed, so as to avoid the poor sealing effect caused by displacement of the ring gasket 1 during underwater maintenance and replacement and insufficient tightening deformation. At the same time, during disassembly, the connection position between the ring gasket 1 and the sealing groove 5 is prevented from being locked and unable to be removed due to the enclosed pressure. The design of the pressure relief groove 3 of the ring gasket 1 solves the problem of easy displacement of the ring gasket 1 during underwater installation. Moreover, since the bolts can be tightened in place after the pressure in the sealing groove 5 is discharged, the sealing surface of the ring gasket 1 produces sufficient plastic deformation after being stressed, thereby greatly improving the sealing effect of the ring gasket 1. It is also easier and more convenient to disassemble by hand during maintenance and replacement, and avoids damage to the sealing surface of the flange 4 and other important parts when using tools for disassembly.

[0039] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultra-high pressure metal sealing ring gasket, comprising a ring gasket (1), characterized in that: The upper and lower sides of the inner ring of the ring gasket (1) are arranged as inclined surfaces (2), and the ring gasket (1) is symmetrically provided with two pressure discharge grooves (3), and the pressure discharge grooves (3) are communicated with the end surface and the inner side of the ring gasket (1).

2. The ultra-high pressure metal sealing ring gasket according to claim 1, characterized in that: Flanges (4) are provided on both sides of the ring gasket (1), and the flanges (4) are provided with sealing grooves (5) for accommodating the ring gasket (1), and the ring gasket (1) is located in the two sealing grooves (5).

3. The ultra-high pressure metal sealing ring gasket according to claim 2, characterized in that: The sealing groove (5) is arranged in a ladder shape, and the area from the groove bottom to the groove opening continuously increases.

4. The ultra-high pressure metal sealing ring gasket according to claim 1, characterized in that: The pressure discharge groove (3) is configured as an inclined groove. When the ring gasket (1) is located in the sealing groove (5), the pressure discharge groove (3) communicates with the sealing groove (5) and the inner diameter space (6) of the ring gasket (1).

5. The ultra-high pressure metal sealing ring gasket according to claim 1, characterized in that: The surface of the ring gasket (1) is selected from one of silver plating, molybdenum disulfide coating or PTFE coating.

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