Sealing gasket for fluid mechanical equipment

Abstract

The utility model discloses a sealing gasket for fluid mechanical equipment, and belongs to the field of range finders. A sealing gasket for fluid mechanical equipment comprises a gasket base and a sealing ring arranged on the gasket base, the sealing ring is filled with gas, and the sealing ring is in an air bag shape; the air bag shape of the sealing ring is provided with a convex part and a smooth part; when the sealing gasket is installed on a flange, gas at the protruding position of the sealing ring moves towards the smooth position so that the sealing ring can expand to seal the flange, and the protruding position of the sealing ring is arranged in the center of the section of the sealing ring. The smooth positions of the sealing ring are arranged on the two sides of the section of the sealing ring. The sealing gasket has the beneficial effects that the sealing ring on the gasket base is arranged to be in an air bag shape, the gap between flanges is filled and sealed during installation, and when the flanges slightly move, the sealing ring in the sealing gasket can still be tightly attached to the surfaces of the flanges to avoid the gap between the flanges, so that the sealing effect is guaranteed.

Description

Technical Field

[0001] This application relates to the field of gaskets, and more specifically, to a gasket for use in fluid machinery equipment. Background Technology

[0002] Fluid machinery refers to machinery that uses fluids as the working medium to convert energy. It includes two main categories: one type converts the energy of a fluid into mechanical energy and outputs shaft power, called a prime mover, such as a water turbine and a steam turbine; the other type converts mechanical energy into the energy of a fluid, pressurizing and transporting the fluid, called a driven machine, such as a pump and a compressor. In pumps, the working medium is a liquid, while in compressors it is a gas. In chemical and petrochemical production, raw materials, semi-finished products, and finished products are often fluids. To meet various process requirements and ensure continuous production, it is necessary to pressurize and transport these fluids.

[0003] Fluid machinery inevitably uses flanges, which are sealed with gaskets. However, in the present technology, the sealing gaskets of flanges may develop gaps due to slight displacement between flanges during actual use, which can lead to the sealing failure of the gaskets. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section above, some embodiments of this application provide a sealing gasket for fluid machinery equipment, comprising: a gasket base and a sealing ring disposed thereon, wherein the sealing ring is filled with gas and forms an air pocket; the air pocket of the sealing ring has a protrusion and a smooth portion; when the sealing gasket is installed on a flange, the gas at the protrusion of the sealing ring moves to the smooth portion, causing the sealing ring to expand and seal the flange.

[0006] Furthermore, the protrusion of the sealing ring is located at the center of the sealing ring cross-section; the smooth portion of the sealing ring is located on both sides of the sealing ring cross-section; the airbag-shaped cross-section of the sealing ring is an axisymmetric figure with the protrusion of the sealing ring as the axis.

[0007] Furthermore, it is applied to tongue and groove flanges.

[0008] Furthermore, when the sealing gasket is installed on the tongue and groove flange, the gas at the center of the sealing ring moves to the smooth areas on both sides, so that the sealing ring expands on both sides to fill and seal the gap of the tongue and groove flange.

[0009] Furthermore, the protrusion of the sealing ring is located on the side near the inner diameter of the gasket base; the smooth part of the sealing ring is located on the side near the outer diameter of the gasket base.

[0010] Furthermore, it is applied to raised face flanges.

[0011] Furthermore, when the sealing gasket is installed on the raised face flange, the gas near the inner diameter of the sealing ring moves towards the smooth area near the outer diameter of the gasket base, so that the sealing ring expands on the side near the outer diameter of the gasket base to fill and seal the gap of the raised face flange.

[0012] Furthermore, the gasket base is made of one of copper, iron, or aluminum; the sealing ring is made of one of rubber or silicone.

[0013] The beneficial effects of this application are as follows: by setting the sealing ring on the gasket base into an airbag shape, the gap between the flanges is filled and sealed during installation. When the flange is slightly displaced, the sealing ring in the gasket can still be tightly attached to the surface of the flange to avoid gaps between the flanges, thereby ensuring the sealing effect. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0015] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the overall structure of the sealing gasket of the present invention;

[0018] Figure 2 This is a cross-sectional view of the structure of the embodiment, with the structure at the cross-section magnified;

[0019] Figure 3 This is a schematic diagram of the structure of an embodiment applied to a tongue and groove flange, mainly showing the structure at the contact point between the gasket and the flange;

[0020] Figure 4 This is a cross-sectional view of the structure of the embodiment, with the structure at the cross-section magnified;

[0021] Figure 5 This is a schematic diagram of an embodiment applied to a raised face flange, mainly showing the structure at the contact point between the gasket and the flange.

[0022] 1. Gasket base; 2. Sealing ring. Detailed Implementation

[0023] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0024] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0025] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0026] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Reference Figure 1 ,

[0029] A sealing gasket for fluid machinery equipment, in which flange structures are inevitably used and therefore need to be sealed, including a gasket base 1 and a sealing ring 2 disposed thereon;

[0030] The gasket base 1 is a metal gasket, made of one of copper, iron, aluminum, or stainless steel. The sealing ring is made of a non-metallic material, primarily characterized by oil resistance, wear resistance, and high pressure resistance, making it suitable for various complex environments. It is made of one of rubber, silicone, fluororubber, or nitrile rubber, with different materials selected depending on the application. For example, nitrile rubber sealing rings are oil- and wear-resistant, suitable for engines or hydraulic systems; fluororubber sealing rings are more resistant to high temperatures and corrosion, suitable for more extreme environments. The sealing ring 2 is filled with gas, forming an airbag shape. The airbag shape of the sealing ring 2 has raised and smooth sections. The gas inside the sealing ring 2 is a rare gas; in this embodiment, helium is preferred because it is inexpensive and harmless to humans. The airbag-shaped sealing ring 2 can fill and seal between a pair of flanges. When slight displacement occurs between the flanges, its airbag characteristics ensure the sealing performance of the flanges during displacement.

[0031] In some schemes, refer to Figure 2 , Figure 3 ,

[0032] For tongue and groove flanges, the bottom of the upper flange is provided with a raised circle, and the top of the lower flange is provided with a groove. The sealing gasket is placed in the groove. It can withstand higher medium pressure, but the groove needs to be cleaned during disassembly.

[0033] The protrusion of the sealing ring 2 is located at the center of the cross-section of the sealing ring 2; the smooth parts of the sealing ring 2 are located on both sides of the cross-section of the sealing ring 2; the airbag-shaped cross-section of the sealing ring 2 is an axisymmetric figure with the protrusion of the sealing ring 2 as the axis, that is, the airbag-shaped cross-section of the sealing ring 2 is an arc. When the sealing gasket is installed in the groove and the upper and lower flanges are tightened by bolts, the convex circle of the upper flange first contacts and compresses the protrusion of the sealing ring 2, causing the gas at the protrusion to move towards the smooth parts on both sides, causing the sides of the sealing ring 2 to expand and fill the gap between the upper and lower flanges, and making the sealing ring 2 fit tightly against the outer wall of the convex circle of the upper flange and the inner wall of the groove of the lower flange, ensuring the sealing performance of the flange. At the same time, the expansion of the sides of the sealing ring 2 makes it difficult for dust and the medium inside the flange to adhere to the groove of the lower flange, making it easy and quick to clean.

[0034] In other schemes, refer to Figure 4 , Figure 5 .

[0035] For raised face flanges, the upper flange has a boss and the lower flange has a groove. The advantage of this design is that it provides excellent restraint on the outer side of the gasket.

[0036] The protruding part of the sealing ring 2 is located on the side near the inner diameter of the gasket base 1; the smooth part of the sealing ring 2 is located on the side near the outer diameter of the gasket base 1. That is, the gasket-shaped side of the sealing ring 2 is high (near the inner diameter of the gasket base 1), and the side is low (near the outer diameter of the gasket base 1). When the sealing gasket is installed in the groove, and the upper and lower flanges are tightened by bolts, the boss of the upper flange first contacts the protruding part of the sealing ring 2, causing the gas at the protruding part to move towards the smooth part on one side. This causes the sealing ring 2 to expand and fill the gap between the upper and lower flanges on the side near the outer diameter of the gasket base 1, and makes the sealing ring 2 fit tightly against the outer wall of the upper flange boss and the inner wall of the groove of the lower flange, ensuring the sealing performance of the flange.

[0037] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A sealing gasket for fluid machinery equipment, comprising a gasket base (1) and a sealing ring (2) arranged thereon, characterized in that, the sealing ring (2) is internally filled with gas and forms a gas bag; the gas bag of the sealing ring (2) has a convex part and a smooth part; when the sealing gasket is installed on a flange, the gas in the convex part of the sealing ring (2) moves to the smooth part to make the sealing ring (2) expand and seal against the flange.

2. The sealing gasket for fluid machinery equipment according to claim 1, characterized in that: the convex part of the sealing ring (2) is arranged at the center of the cross section of the sealing ring (2); the smooth part of the sealing ring (2) is arranged on both sides of the cross section of the sealing ring (2); the cross section of the gas bag of the sealing ring (2) is an axisymmetric figure with the convex part of the sealing ring (2) as the axis.

3. The sealing gasket for fluid machinery equipment according to claim 2, characterized in that: it is applied to a tongue-and-groove flange.

4. The sealing gasket for fluid machinery equipment according to claim 3, characterized in that: when the sealing gasket is installed on the tongue-and-groove flange, the gas in the convex part at the center of the sealing ring (2) moves to the smooth parts on both sides to make the sealing ring (2) expand and seal against the gap of the tongue-and-groove flange.

5. The sealing gasket for fluid machinery equipment according to claim 1, characterized in that: the convex part of the sealing ring (2) is arranged on one side close to the inner diameter of the gasket base (1); the smooth part of the sealing ring (2) is arranged on one side close to the outer diameter of the gasket base (1).

6. The sealing gasket for fluid machinery equipment according to claim 5, characterized in that: it is applied to a concave-convex flange.

7. The sealing gasket for fluid machinery equipment according to claim 5, characterized in that: when the sealing gasket is installed on the concave-convex flange, the gas in the convex part of the sealing ring (2) close to the inner diameter of the gasket base (1) moves to the smooth part close to the outer diameter of the gasket base (1) to make the sealing ring (2) expand and seal against the gap of the concave-convex flange.

8. The sealing gasket for fluid machinery equipment according to claim 4 or 7, characterized in that: the material of the gasket base (1) is one of copper, iron and aluminum; the material of the sealing ring (2) is one of rubber and silicone.

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