Metal sealing ring gasket

Abstract

The utility model discloses a metal sealing ring gasket which comprises a ring gasket body, the ring gasket body is provided with a pressure through hole penetrating through the ring gasket body, the upper side and the lower side of the inner diameter of the ring gasket body are respectively provided with a first inner sealing inclined face and a second inner sealing inclined face, and the first inner sealing inclined face and the second inner sealing inclined face are arranged adjacently. The upper side and the lower side of the outer diameter of the ring gasket body are each provided with a first outer sealing inclined face and a second outer sealing inclined face, and the first outer sealing inclined faces and the second outer sealing inclined faces are arranged adjacently. The utility model has the advantages of pressure balance function and easy disassembly, and also has self-tightening sealing function.

Description

Technical Field

[0001] The utility model relates to the field of sealing ring gaskets, in particular to a metal sealing ring gasket. Background Art

[0002] Ring gaskets used in ultra-high pressure equipment, especially in the connection parts of oil and gas wellhead equipment, oil tree equipment interfaces, ultra-high pressure flanges and ultra-high pressure valves, are usually fastened with high-torque bolts. Ordinary metal octagonal ring gaskets, after being fastened with high torque, will be locked and unable to be removed during replacement and disassembly due to the closed pressure generated by the negative pressure in the ring groove. In ultra-high pressure working conditions, the ring gaskets do not have the pressure balance function on both ends, which will cause uneven force on the sealing surface of the ring gasket, thereby affecting the sealing effect and service life. In addition, ordinary metal octagonal gaskets cannot undertake ultra-high pressure sealing tasks due to the low requirements for processing accuracy (±0.18mm) and surface roughness (Ra≤1.6um), and do not have a self-tightening sealing function. Utility Model Content

[0003] The purpose of the present invention is to provide a metal sealing ring gasket to solve the problems raised in the above background technology. The metal sealing ring gasket has the advantages of pressure balancing function and easy disassembly, and also has the advantages of self-tightening sealing function.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a metal sealing ring gasket, comprising a ring gasket body, the ring gasket body being provided with a pressure through hole penetrating the ring gasket body, a first inner sealing bevel and a second inner sealing bevel being provided on the upper and lower sides of the inner diameter of the ring gasket body, the first inner sealing bevel and the second inner sealing bevel being arranged adjacent to each other, and a first outer sealing bevel and a second outer sealing bevel being provided on the upper and lower sides of the outer diameter of the ring gasket body, the first outer sealing bevel and the second outer sealing bevel being arranged adjacent to each other.

[0005] Preferably, the first inner sealing bevel, the second inner sealing bevel, the first outer sealing bevel and the second outer sealing bevel are all set to 23°.

[0006] Preferably, a first flange and a second flange are provided on the outer side of the ring gasket body, and the first flange and the second flange are connected by bolts, and nuts are threadedly connected at both ends of the bolts.

[0007] Preferably, the first flange and the second flange are both welded with steel pipes.

[0008] Preferably, the first flange and the second flange are both provided with a sealing groove, and the sealing groove is arranged in a ladder shape.

[0009] Preferably, the bottom of the sealing groove does not contact the ring gasket body.

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

[0011] 1. This utility model is a pressure-tightening ultra-high-pressure metal sealing ring gasket used in oil and gas wellhead device connections, Christmas tree equipment interfaces, ultra-high-pressure flanges, and ultra-high-pressure valves. The ring gasket body is an octagonal ring gasket, and a pressure through-hole is provided on the end face of the ring gasket body, which penetrates the height of the ring gasket. The ring gasket body is designed for a maximum pressure of 138MPa. The 23° bevel of the ring gasket serves as the sealing surface, which is used in conjunction with the 23° sealing groove of the flange and other connection parts. The tightening force of the high-strength bolts is transmitted to the sealing groove, and the sealing groove then transmits the force to the sealing surface of the ring gasket body, causing the sealing surface to plastically deform to form a surface seal.

[0012] 2. The pressure through-hole design enables the ring gasket to have a pressure balance function under ultra-high pressure, and also solves the problem that the ring gasket is locked by the trapped pressure and cannot be removed during disassembly;

[0013] 3. Self-tightening sealing design, the greater the medium pressure, the better the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of the ring gasket body;

[0015] Figure 2 is a cross-sectional view of the ring gasket body;

[0016] Figure 3 It is a structural diagram of an embodiment;

[0017] Figure 4 for Figure 3 A partial enlarged view of area A in the middle.

[0018] In the figure: 1. Ring gasket body; 2. Pressure through hole; 3. First inner sealing bevel; 4. Second inner sealing bevel; 5. First outer sealing bevel; 6. Second outer sealing bevel; 7. First flange; 8. Second flange; 9. Bolt; 10. Nut; 11. Steel pipe; 12. Sealing groove. DETAILED DESCRIPTION

[0019] 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.

[0020] In the embodiment of the present utility model,

[0021] A metal sealing ring gasket, such as Figures 1-4As shown, it includes a ring gasket body 1, which is provided with a pressure through hole 2 that penetrates the ring gasket body 1, and a first inner sealing bevel 3 and a second inner sealing bevel 4 are provided on the upper and lower sides of the inner diameter of the ring gasket body 1, and the first inner sealing bevel 3 and the second inner sealing bevel 4 are arranged adjacent to each other, and a first outer sealing bevel 5 and a second outer sealing bevel 6 are provided on the upper and lower sides of the outer diameter of the ring gasket body 1, and the first outer sealing bevel 5 and the second outer sealing bevel 6 are arranged adjacent to each other.

[0022] The first inner sealing bevel 3 , the second inner sealing bevel 4 , the first outer sealing bevel 5 and the second outer sealing bevel 6 are all set at 23°.

[0023] A first flange 7 and a second flange 8 are provided on the outer side of the ring gasket body 1 . The first flange 7 and the second flange 8 are connected by bolts 9 . Nuts 10 are threadedly connected at both ends of the bolts 9 .

[0024] The first flange 7 and the second flange 8 are both welded with steel pipes 11 .

[0025] The first flange 7 and the second flange 8 are both provided with a sealing groove 12 , and the sealing groove 12 is arranged in a ladder shape.

[0026] The bottom of the sealing groove 12 does not contact the ring gasket body 1 .

[0027] Working principle:

[0028] The ring gasket body 1 has a pressure balancing function. The principle is that under the medium pressure, the connecting devices at both ends of the ring gasket body 1 will begin to produce gaps as the pressure increases, and the inner bevel of the sealing groove 12 will also produce gaps. The outer bevel of the ring gasket with higher processing accuracy (±0.05mm) and higher surface roughness requirements (Ra≤0.8um) plays the most important sealing role at this time. The setting of the pressure through hole 2 can make the medium pressure form a balanced force on both sides of the ring gasket body 1, which helps to balance the force on the two outer bevels of the ring gasket. As the medium pressure increases, the greater the pressure on the two outer bevels, the better the self-tightening sealing effect of the outer bevels. In addition, the design of the pressure through hole 2 also solves the problem that air can enter the sealing groove 12 when the ring gasket body 1 is disassembled, thereby avoiding the problem of being locked by the enclosed pressure and unable to be removed.

[0029] 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. A metal sealing ring gasket, comprising a ring gasket body (1), characterized in that: The ring gasket body (1) is provided with a pressure through hole (2) penetrating the ring gasket body (1); the upper and lower sides of the inner diameter of the ring gasket body (1) are provided with a first inner sealing bevel (3) and a second inner sealing bevel (4); the first inner sealing bevel (3) and the second inner sealing bevel (4) are arranged adjacent to each other; the upper and lower sides of the outer diameter of the ring gasket body (1) are provided with a first outer sealing bevel (5) and a second outer sealing bevel (6); the first outer sealing bevel (5) and the second outer sealing bevel (6) are arranged adjacent to each other.

2. The metal sealing ring gasket according to claim 1, characterized in that: The first inner sealing bevel (3), the second inner sealing bevel (4), the first outer sealing bevel (5) and the second outer sealing bevel (6) are all set at 23°.

3. The metal sealing ring gasket according to claim 1, characterized in that: A first flange (7) and a second flange (8) are provided on the outer side of the ring gasket body (1); the first flange (7) and the second flange (8) are connected by bolts (9); and nuts (10) are threadedly connected at both ends of the bolts (9).

4. The metal sealing ring gasket according to claim 3, characterized in that: The first flange (7) and the second flange (8) are both welded with a steel pipe (11).

5. The metal sealing ring gasket according to claim 3, characterized in that: The first flange (7) and the second flange (8) are both provided with a sealing groove (12), and the sealing groove (12) is arranged in a ladder shape.

6. The metal sealing ring gasket according to claim 5, characterized in that: The bottom of the sealing groove (12) does not contact the ring gasket body (1).

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