Metal sealing ring for high-pressure flange

Abstract

The utility model relates to the technical field of metal sealing rings, and discloses a metal sealing ring for a high-pressure flange, which comprises a ring body, the section of the ring body is octagonal, the shape of the cross section of the ring body is the same as that of the cross section of a flange plate groove, the length of the upper edge of the cross section of the ring body is 1.2-1.3 times that of the bottom edge of the flange plate groove, and the length of the lower edge of the ring body is 1.2-1.3 times that of the flange plate groove. The length of the ring body is the same as that of grooves of the upper flange plate and the lower flange plate, the ring body is made of 00Cr17Ni14Mo2, the height of the ring body is 1 / 2-3 / 4 of the height of the grooves after the upper flange plate and the lower flange plate are connected, and the diameter of a central circle of the ring body is the same as that of the grooves of the flange plates. The shape of the sealing ring is matched with the gap between the two high-pressure flanges, and the sealing ring is matched with the change of metal materials, so that the sealing performance is improved, and meanwhile, the anti-corrosion characteristic is achieved.

Description

Technical Field

[0001] This utility model relates to the field of metal sealing ring technology, specifically a metal sealing ring for high-pressure flanges. Background Technology

[0002] Sealing rings are a common component in hydrogenation reactors, used to ensure the airtightness between pipe connections and prevent pipe leakage. Existing sealing rings are usually made of rubber or metal, and the choice of sealing ring material and structural form has an important significance for its sealing performance and service life.

[0003] The existing technology has the following defects: the flange seal of the ordinary residue oil hydrotreating reactor adopts a T-shaped sealing groove structure, which is a single-layer seal. After long-term use, the flange sealing groove is subjected to the pressure of the gasket and hydrogen is also present, which creates conditions for hydrogen embrittlement. Hydrogen residue in steel will cause steel embrittlement and lead to seal failure. Therefore, a metal sealing ring for high-pressure flanges is proposed.

[0004] Patent document CN219673611U describes a metal sealing ring suitable for sealing pipe flanges. Connecting rings are fixedly provided on two opposite annular surfaces of the sealing ring. The cross-sections of the two connecting rings are both O-shaped, and the axes of the two connecting rings coincide with those of the sealing ring. This reduces the probability of a gap between the sealing ring and the flange and improves the sealing effect. However, it still cannot prevent hydrogen corrosion and slag oil corrosion. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, this utility model provides a metal sealing ring for high-pressure flanges to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a metal sealing ring for high-pressure flanges, comprising:

[0009] The ring body has an octagonal cross-section, the cross-sectional shape of which is the same as the cross-sectional shape of the flange groove. The length of the upper side of the ring body's cross-section is 1.2 to 1.3 times the length of the bottom side of the flange groove. The length of the ring body is the same as the length of the grooves of the upper and lower flanges. The material of the ring body is 00Cr17Ni14Mo2. The height of the ring body is 1 / 2 to 3 / 4 of the height of the groove after the upper and lower flanges are connected. The diameter of the center circle of the ring body is the same as the diameter of the two grooves of the flange.

[0010] Preferably, the outer ring of the ring has a fixing groove inside, and the fixing groove is integrally formed with the ring body, and a sealing soft ring is provided on the outside of the ring body.

[0011] Preferably, the fixing groove is provided with a limiting ring groove inside, and the limiting ring groove is integrally formed with the ring body. The limiting ring groove is connected to the fixing groove and plays a limiting role.

[0012] Preferably, the sealing ring includes an embedded ring and an extension ring, and the embedded ring and the extension ring are integrally formed. The sealing ring improves the sealing performance when the two high-pressure flanges are joined.

[0013] Preferably, the upper and lower sides of the outer side of the embedded ring are provided with inclined protruding rings, and the inclined protruding rings are integrally formed with the embedded ring. The inclined protruding rings are adapted to the limiting ring groove, and the inclined protruding rings form a barb structure to prevent the sealing soft ring from falling off.

[0014] Preferably, the extension ring is provided with two sets of boss rings on its outside, and the boss rings are integrally formed with the extension ring, thereby further improving the sealing performance.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a metal sealing ring for high-pressure flanges, which has the following advantages:

[0017] This invention features an octagonal ring body with a cross-sectional shape identical to that of the flange groove. This ensures a tight seal between the ring body and the groove walls when the upper and lower flanges are connected, achieving a double-layer sealing effect. The ring body is made of 00Cr17Ni14Mo2 material, which possesses excellent corrosion resistance, effectively preventing hydrogen and residual oil corrosion. This solves the problems mentioned in the background art. The double-layer sealing structure allows for convenient installation, long service life, and better sealing performance compared to ordinary T-type sealing grooves. Attached Figure Description

[0018] Figure 1 This is a perspective view of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged view of a portion of region A in the middle;

[0021] Figure 4 This is a cross-sectional schematic diagram of a high-pressure flange;

[0022] Figure 5 For assembling metal sealing rings for high-pressure flanges.

[0023] In the diagram: 1. Ring body; 2. Embedded ring; 3. Extension ring; 4. Boss ring; 5. Fixing groove; 6. Limiting ring groove; 7. Angled convex ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides a technical solution: a metal sealing ring for high-pressure flanges. Please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,include:

[0026] Ring 1 has an octagonal cross-section, and its cross-sectional shape is the same as that of the flange groove. The length of the upper side of the cross-section of ring 1 is 1.2 to 1.3 times the length of the bottom side of the flange groove. The length of ring 1 is the same as the length of the grooves of the upper and lower flanges. The material of ring 1 is 00Cr17Ni14Mo2. The height of ring 1 is 1 / 2 to 3 / 4 of the height of the groove after the upper and lower flanges are connected. The diameter of the center circle of ring 1 is the same as the diameter of the two grooves of the flange.

[0027] Please see Figure 1 , Figure 2 and Figure 3 The inner side of the outer ring of the ring body 1 is provided with a fixing groove 5, and the fixing groove 5 is integrally formed with the ring body 1. The outer side of the ring body 1 is provided with a sealing soft ring.

[0028] Please see Figure 2 and Figure 3 The fixed groove 5 is provided with a limiting ring groove 6 inside, and the limiting ring groove 6 is integrally formed with the ring body 1. The limiting ring groove 6 is connected to the fixed groove 5, and the limiting ring groove 6 plays a limiting role.

[0029] Please see Figure 2 and Figure 3 The sealing ring includes an embedded ring 2 and an extension ring 3, and the embedded ring 2 and the extension ring 3 are integrally formed. The sealing ring improves the sealing performance when the two high-pressure flanges are joined.

[0030] Please see Figure 2 and Figure 3The upper and lower sides of the embedded ring 2 are provided with inclined protruding rings 7, and the inclined protruding rings 7 are integrally formed with the embedded ring 2. The inclined protruding rings 7 are adapted to the limiting ring groove 6. The inclined protruding rings 7 form a barb structure to prevent the sealing soft ring from falling off.

[0031] Please see Figure 2 and Figure 3 The extension ring 3 has two sets of boss rings 4 on its outside, and the boss rings 4 are integrally formed with the extension ring 3. The boss rings 4 further improve the sealing performance.

[0032] This design features an octagonal ring body 1 with a cross-sectional shape identical to that of the flange groove. This ensures that when the upper and lower flanges are connected, the ring body fits tightly against the groove walls, achieving a double-layer sealing effect. When installing the sealing ring and ring body 1, one end of the embedded ring 2 is inserted into the fixing groove 5, and the beveled convex ring 7 is inserted into the limiting ring groove 6. The beveled convex ring 7 forms a barbed structure to prevent the sealing ring from detaching and improve its stability. When the two flanges are joined, they compress the extension ring 3, and the deformation generated by the boss ring 4 fills the gap between the two flanges, further improving the sealing performance.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal sealing ring for high-pressure flanges, characterized in that, include: The ring body (1) has an octagonal cross-section. The cross-sectional shape of the ring body (1) is the same as the cross-sectional shape of the flange groove. The length of the upper side of the cross-section of the ring body (1) is 1.2 to 1.3 times the length of the bottom side of the flange groove. The length of the ring body (1) is the same as the length of the upper and lower flange grooves. The height of the ring body (1) is 1 / 2 to 3 / 4 of the height of the groove after the upper and lower flanges are connected. The diameter of the center circle of the ring body (1) is the same as the diameter of the two grooves of the flange.

2. A metal sealing ring for a high-pressure flange according to claim 1, characterized in that: The inner side of the outer ring of the ring body (1) is provided with a fixing groove (5), and the fixing groove (5) is integrally formed with the ring body (1). The outer side of the ring body (1) is provided with a sealing soft ring.

3. A metal sealing ring for a high-pressure flange according to claim 2, characterized in that: The fixed groove (5) is provided with a limiting ring groove (6) inside, and the limiting ring groove (6) is integrally formed with the ring body (1). The limiting ring groove (6) is connected to the fixed groove (5).

4. A metal sealing ring for a high-pressure flange according to claim 2 or 3, characterized in that: The sealing ring includes an embedded ring (2) and an extension ring (3), and the embedded ring (2) and the extension ring (3) are integrally formed.

5. A metal sealing ring for a high-pressure flange according to claim 4, characterized in that: The upper and lower sides of the outer side of the embedded ring (2) are provided with inclined protruding rings (7), and the inclined protruding rings (7) are integrally formed with the embedded ring (2).

6. A metal sealing ring for a high-pressure flange according to claim 5, characterized in that: The inclined convex ring (7) is adapted to the limiting ring groove (6).

7. A metal sealing ring for a high-pressure flange according to claim 4, characterized in that: The extension ring (3) is provided with two sets of boss rings (4) on its outside, and the boss rings (4) and the extension ring (3) are integrally formed.

8. A metal sealing ring for a high-pressure flange according to any one of claims 1-7, characterized in that: The material of the ring body (1) is 00Cr17Ni14Mo2.

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