Welding lip sealing ring

Abstract

The utility model discloses a welding lip sealing ring which is composed of two round cavity type sealing ring bodies, a circle of protruding arc sealing face is arranged on one side of one sealing ring, round hollow lips are arranged at the two ends of the sealing ring, and after the two sealing rings are attached to each other, the hollow lips are folded to form a round structure. The device has the advantages that the device adapts to thermal expansion difference caused by high temperature, and the situation of weld cracking caused by radial force contraction due to the thermal expansion difference is avoided.

Description

Technical Field

[0001] The utility model relates to the field of sealing rings, in particular to a welding lip sealing ring. Background Art

[0002] The sealing of the metal circular cavity weld lip sealing ring of the steel pipe flange used in the petrochemical industry is achieved by welding. The problem with conventional weld lip rings is that when there is a difference in thermal expansion between the flange and the equipment in a high-temperature environment, the use of weld lip rings is prone to cracking of the weld due to the thermal expansion difference. To address this problem, this paper proposes a solution for a metal circular cavity weld lip sealing ring gasket. Utility Model Content

[0003] The purpose of the present invention is to provide a welding lip sealing ring to solve the problems raised in the above-mentioned background technology. The welding lip sealing ring has the advantages of adapting to the thermal expansion difference caused by high temperature and avoiding the situation where the weld cracks due to radial force contraction caused by the thermal expansion difference.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a welding lip sealing ring, which is composed of two circular hollow sealing ring bodies, one side of which is provided with a circle of raised arc sealing surface, and both ends of the sealing ring are provided with circular hollow lips. After the two sealing rings are fitted together, the hollow lips close together to form a circular structure.

[0005] Preferably, an upper flange and a lower flange are provided on both sides of the sealing ring, and the upper flange and the lower flange are connected by a screw, and one end of the screw is threadedly connected to a nut.

[0006] Preferably, the inner diameter and the hollow lip of the sealing ring are both provided with welding positions.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] 1. The upper and lower closing parts of the circular hollow lip of the sealing ring and the contact parts of the inner diameter of the sealing ring and the flange are welded and sealed respectively after tightening. After the raised arc sealing surface and the corresponding end face of the sealing ring are closed, the raised arc sealing surface undergoes plastic deformation under the tightening force of the flange to form a line seal;

[0009] 2. This solution uses two upper and lower welding lips to weld and seal the flange after it is bolted. The circular hollow lip of the sealing ring can expand and contract to accommodate radial expansion differences of up to 5 mm. Compared with conventional welding lips, the hollow lip structure can adapt to thermal expansion differences caused by high temperatures, avoiding weld cracking caused by radial contraction due to thermal expansion differences.

[0010] 3. Conventional circular cavity welding lip rings will produce a large amount of accumulated liquid after long-term use, causing corrosion to the thin wall of the cavity and the welding parts. The sealing ring with a raised arc sealing surface mentioned in this solution, when the thermal expansion difference is generated at high temperature, the raised arc sealing surface and the corresponding end face of the welding lip ring form an effective sealing structure, which can prevent the liquid inside the pipeline from flowing into the thin wall of the cavity, greatly reducing the corrosion of the accumulated liquid on the thin wall of the circular cavity and the welding parts, and significantly improving the sealing performance and service life of the welding lip ring in high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the sealing ring body;

[0012] Figure 2 for Figure 1 Cross-sectional view in the AA direction;

[0013] Figure 3 It is a structural diagram of an embodiment;

[0014] Figure 4 A schematic diagram of the working condition structure of the embodiment;

[0015] Figure 5 for Figure 4 A partial magnified view of area D in the middle.

[0016] In the figure: 1. Sealing ring body; 2. Arc sealing surface; 3. Hollow lip; 4. Upper flange; 5. Lower flange; 6. Screw; 7. Nut. DETAILED DESCRIPTION

[0017] 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.

[0018] In the embodiment of the present utility model,

[0019] A welding lip sealing ring consists of two circular cavity-type sealing ring bodies. One side of one sealing ring is provided with a circle of raised arc sealing surface, and both ends of the sealing ring are provided with circular hollow lips. When the two sealing rings are fitted together, the hollow lips close together to form a circular structure.

[0020] An upper flange and a lower flange are provided on both sides of the sealing ring. The upper flange and the lower flange are connected by a screw rod, and one end of the screw rod is threadedly connected to a nut.

[0021] The inner diameter and the hollow lip of the sealing ring are both provided with welding locations.

[0022] Working principle:

[0023] A welding lip sealing ring consists of two circular cavity-type sealing ring bodies 1, one side of which is provided with a raised arc sealing surface 2, and both ends of the sealing ring are provided with circular hollow lips 3. After the two sealing rings are fitted together, the hollow lips 3 are closed to form a circular structure.

[0024] An upper flange 4 and a lower flange 5 are provided on both sides of the sealing ring. The upper flange 4 and the lower flange 5 are connected by a screw 6 , and a nut 7 is threadedly connected to one end of the screw 6 .

[0025] The inner diameter of the sealing ring and the hollow lip 3 are both provided with welding locations.

[0026] Working principle:

[0027] 1. The upper and lower closing parts of the circular hollow lip 3 of the sealing ring and the contact parts of the inner diameter of the sealing ring and the flange are welded and sealed respectively after tightening. After the raised arc sealing surface 2 and the corresponding end face of the sealing ring are closed, the raised arc sealing surface 2 is plastically deformed under the tightening force of the flange to form a line seal;

[0028] 2. This solution uses two upper and lower welding lips to weld and seal the flange after it is bolted. The circular hollow lip 3 of the sealing ring can expand and contract to accommodate radial expansion differences of up to 5 mm. Compared with conventional welding lips, the structural design of the hollow lip 3 can adapt to thermal expansion differences caused by high temperatures, avoiding weld cracking caused by radial contraction due to thermal expansion differences.

[0029] 3. Conventional circular cavity welding lip rings will produce a large amount of accumulated liquid after long-term use, causing corrosion to the thin wall of the cavity and the welding parts. The sealing ring with a raised arc sealing surface 2 mentioned in this solution, when the thermal expansion difference is generated at high temperature, the raised arc sealing surface 2 and the corresponding end face of the welding lip ring form an effective sealing structure, which can prevent the liquid inside the pipeline from flowing to the thin wall of the cavity, greatly reducing the corrosion of the accumulated liquid on the thin wall of the circular cavity and the welding parts, and significantly improving the sealing performance and service life of the welding lip ring in high temperature environment.

[0030] 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 welding lip sealing ring, comprising two circular cavity-type sealing ring bodies (1), characterized in that: A raised arc sealing surface (2) is provided on one side of one of the sealing rings, and circular hollow lips (3) are provided at both ends of the sealing ring. When the two sealing rings are fitted together, the hollow lips (3) are closed to form a circular structure.

2. A welding lip sealing ring according to claim 1, characterized in that: An upper flange (4) and a lower flange (5) are provided on both sides of the sealing ring. The upper flange (4) and the lower flange (5) are connected by a screw (6). One end of the screw (6) is threadedly connected to a nut (7).

3. The welding lip sealing ring according to claim 1, characterized in that: The inner diameter of the sealing ring and the hollow lip (3) are both provided with welding positions.

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