Elastic gasket

Abstract

The invention relates to the technical field of gaskets, and particularly discloses an elastic gasket which comprises a gasket body, the middle of the gasket body is concave downwards, and an interlayer pad is arranged in the gasket body. The lower surface of the gasket body is coated with ethylene propylene diene monomer. The center of the bottom of the gasket body is a plane part, and the outer edge of the plane part gradually inclines upwards to the outer edge of the gasket body to form a slope part. The center of the top of the gasket body is an inner concave part which gradually inclines upwards from inside to outside, a horizontal part is arranged between the outer edge of the inner concave part and the outer edge of the gasket body, and the inner concave part and the horizontal part are in smooth transition. According to the boiler drum elastic gasket, the sealing performance is improved through the appearance structure of the boiler drum elastic gasket, and leakage is effectively prevented. The EPDM rubber coating layer enhances the wear resistance and corrosion resistance of the gasket, and prolongs the service life. And due to the design of the inclined surface parts and the concave parts, the gasket is more flexible in the mounting and using processes, and the adaptability is high.

Description

Technical Field

[0001] The invention relates to the technical field of gaskets, in particular to an elastic gasket for a boiler drum. Background Art

[0002] In the boiler industry, the steam drum, as one of the core components of the boiler, undertakes the important task of storing and separating the steam-water mixture. In order to ensure the safe operation of the steam drum, the sealing performance of its connection parts is crucial. Traditional boiler drum gaskets mostly adopt a single-layer structure, usually made of materials such as metal or rubber, but these gaskets have exposed some problems in practical applications.

[0003] First, although the single-layer metal gasket has certain strength and hardness, it is easy to undergo plastic deformation or thermal expansion in the high-pressure and high-temperature boiler environment, resulting in reduced sealing performance and even leakage accidents. Although the single-layer rubber gasket has good elasticity and sealing performance, its high temperature resistance and corrosion resistance are relatively poor. It is easy to age and deteriorate after long-term use, affecting the sealing effect.

[0004] In order to overcome the shortcomings of traditional gaskets, the industry has begun to explore the use of composite elastic gaskets. Such gaskets are usually composed of multiple layers of materials, each layer of which complements each other and improves the sealing performance and service life of the gasket. However, the existing composite gaskets still have some defects in structural design, such as insufficient fit of the sealing surface and uneven distribution of sealing pressure, resulting in unsatisfactory sealing effect.

[0005] Therefore, an elastic gasket becomes a problem that people need to solve urgently. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a boiler drum elastic gasket with excellent sealing performance, good wear resistance and adaptability.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is: an elastic gasket, comprising a gasket body, the middle part of the gasket body is concave, and a sandwich gasket is arranged inside the gasket body.

[0008] Furthermore, the lower surface of the gasket body is coated with EPDM rubber.

[0009] Furthermore, the center of the bottom of the gasket body is a plane portion, and an inclined portion is formed by gradually tilting upward from the outer edge of the plane portion to the outer edge of the gasket body.

[0010] Furthermore, the plane portion and the inclined portion are transitioned by a height difference.

[0011] Furthermore, the top center of the gasket body is an inner concave portion that gradually tilts upward from the inside to the outside, and the portion between the outer edge of the inner concave portion and the outer edge of the gasket body is a horizontal portion, and the inner concave portion and the horizontal portion have a smooth transition.

[0012] Furthermore, the interlayer gasket adopts a metal toothed gasket.

[0013] Furthermore, the sandwich pad adopts a basic type winding pad.

[0014] The advantages of the present invention over the prior art are as follows: the elastic gasket of the boiler drum of the present invention improves the sealing performance through its external structure and effectively prevents leakage. The EPDM rubber coating layer enhances the wear resistance and corrosion resistance of the gasket and prolongs its service life. The design of the inclined portion and the inner concave portion makes the gasket more flexible and adaptable during installation and use. The optional sandwich gasket type meets the sealing requirements under different working conditions and improves the versatility and practicality of the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an elastic gasket of the present invention.

[0016] Figure 2 It is a top view of an elastic gasket of the present invention.

[0017] Figure 3 It is a bottom view of an elastic gasket of the present invention.

[0018] Figure 4 It is a front view of an elastic gasket of the present invention.

[0019] Figure 5 yes Figure 4 Cross-section view at AA.

[0020] As shown in the figure: 1. Gasket body, 2. Interlayer pad, 3. Flat part, 4. Inclined part, 5. Concave part, 6. Horizontal part. DETAILED DESCRIPTION

[0021] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “inside”, “outside”, “vertical” and “circumferential” are based on the orientations or positional relationships shown in the accompanying 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The elastic gasket of the present invention is further described in detail below with reference to the accompanying drawings.

[0024] Combined with Figure 1-5 The specific implementation process of an elastic gasket of the present invention is as follows:

[0025] An elastic gasket includes a gasket body 1, the middle part of which is designed to be concave to better fit the curvature of the drum connection surface and reduce the sealing gap. An interlayer gasket 2 is arranged inside the gasket body 1 to further enhance the strength and sealing performance of the gasket.

[0026] The lower surface of the gasket body 1 is fully covered with EPDM rubber, which has good heat resistance, oxidation resistance and corrosion resistance, can effectively extend the service life of the gasket and improve the sealing effect.

[0027] The center of the bottom of the gasket body 1 is a plane portion 3, and the outer edge of the plane portion 3 gradually tilts upward toward the outer edge of the gasket body 1 to form a slope portion 4. This design is not only convenient for installation and positioning, but also allows the slope portion 4 to undergo elastic deformation when subjected to pressure to better fill the sealing gap.

[0028] The plane portion 3 and the inclined portion 4 have a smooth transition through the height difference, thereby avoiding stress concentration and improving the overall strength and stability of the gasket.

[0029] The top center of the gasket body 1 is designed as an inner concave portion 5 that gradually tilts upward from the inside to the outside, and the outer edge of the inner concave portion 5 to the outer edge of the gasket body 1 is a horizontal portion 6. The smooth transition between the inner concave portion 5 and the horizontal portion 6 ensures the flexibility of the gasket during installation and provides uniform sealing pressure during operation.

[0030] The sandwich pad 2 can be made of metal toothed gasket or basic spiral wound gasket. The metal toothed gasket has high strength and good resilience, and is suitable for high-pressure environments; the basic spiral wound gasket has good flexibility and sealing, and is suitable for occasions with large temperature changes. Users can choose the appropriate type of sandwich pad 2 according to specific working conditions.

[0031] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An elastic gasket, characterized in that: It comprises a gasket body (1), the middle part of the gasket body (1) is concave, and a sandwich gasket (2) is arranged inside the gasket body (1).

2. An elastic gasket according to claim 1, characterized in that: The lower surface of the gasket body (1) is coated with EPDM rubber.

3. An elastic gasket according to claim 2, characterized in that: The center of the bottom of the gasket body (1) is a plane portion (3), and a slope portion (4) is formed by gradually tilting upward from the outer edge of the plane portion (3) toward the outer edge of the gasket body (1).

4. An elastic gasket according to claim 3, characterized in that: The plane portion (3) and the inclined portion (4) are transitioned via a height difference.

5. The elastic gasket according to claim 3, characterized in that: The center of the top of the gasket body (1) is an inner concave portion (5) which gradually tilts upward from the inside to the outside, and a horizontal portion (6) is formed between the outer edge of the inner concave portion and the outer edge of the gasket body (1), and a smooth transition is formed between the inner concave portion (5) and the horizontal portion (6).

6. An elastic gasket according to claim 5, characterized in that: The sandwich gasket (2) is a metal toothed gasket.

7. The elastic gasket according to claim 5, characterized in that: The sandwich pad (2) adopts a basic type of winding pad.

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