Sealing ring with low temperature resistance and high sealing performance

Abstract

The utility model provides a seal ring with low temperature resistance and high sealing performance, which relates to the technical field of seal rings, and comprises a seal ring inner ring, a seal ring middle layer is arranged on the outer side of the seal ring inner ring, a plurality of mounting cavities are formed in the seal ring middle layer, and first magnets are arranged in the mounting cavities and close to the outer sides. Second magnets are arranged on the inner sides of the first magnets, certain supporting force can be provided for the outermost layer of the middle layer of the sealing ring through mutual repulsive reaction of the first magnets and the second magnets, the filling cavity is filled with inert gas, the supporting force is provided for the outermost side of the sealing ring, and therefore the sealing performance of the sealing ring is improved. Meanwhile, the reinforcing ring is arranged at the bottom of the sealing ring and can also support the outer ring of the sealing ring on the outer layer, and the reinforcing ring, the sealing ring and the reinforcing ring are matched for use, so that pre-tightening force can be provided for the sealing ring in the most original state.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, in particular to a sealing ring with low temperature resistance and high sealing performance. Background Art

[0002] The sealing ring is a component that plays a key sealing role in many fields. The sealing ring mainly relies on its own elastic deformation to fill the tiny gap between the sealing surfaces, thereby preventing the leakage of fluid or gas. Its sealing performance is affected by many factors, including material properties, dimensional accuracy, hardness, compression, and the temperature, pressure and medium of the working environment. In actual application, it is necessary to select a suitable sealing ring based on specific working conditions, such as extreme temperature range, high pressure environment, special medium characteristics, and comprehensive considerations such as installation space and cost. High-quality sealing rings can work stably for a long time, significantly reduce leakage and failure, greatly ensure the operating reliability and safety of equipment or systems, and effectively improve the service life and work efficiency of equipment. They play an irreplaceable and important role in industrial production and daily life.

[0003] In low-temperature environments, ordinary sealing rings often face a series of performance degradation problems. Due to the characteristics of the material, it will shrink at low temperatures, resulting in problems such as the diameter of the sealing ring itself being reduced. This situation will cause the sealing ring to be unable to form sufficient extrusion with the sealing part around it, which will lead to a decrease in the sealing performance of the sealing ring and leakage. Therefore, we propose a sealing ring that is resistant to low temperatures and has high sealing performance. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art. In a low temperature environment, ordinary sealing rings often face a series of performance degradation problems. Due to the characteristics of the material, it will shrink at low temperatures, resulting in problems such as a reduction in the diameter of the sealing ring itself. This situation will cause the sealing ring to be unable to form sufficient extrusion with the sealing member around it, which will lead to a decrease in the sealing performance of the sealing ring and leakage.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sealing ring with low temperature resistance and high sealing performance, comprising a sealing ring inner ring, a sealing ring middle layer is arranged on the outer side of the sealing ring inner ring, a plurality of installation cavities are opened inside the sealing ring middle layer, a first magnet is arranged inside and close to the outer side of a plurality of the installation cavities, and a second magnet is arranged on the inner side of a plurality of the first magnets;

[0007] An outer sealing ring is arranged on the outer side of the sealing ring middle layer, a filling cavity is opened inside the outer sealing ring, an installation groove is opened at the bottom of the outer sealing ring and close to the outer side, and a reinforcement ring is arranged inside the installation groove.

[0008] Preferably, a first top sealing gasket is provided on the top of the inner ring of the sealing ring and the middle layer of the sealing ring, and a second top sealing gasket is provided on the top of the outer ring of the sealing ring.

[0009] Preferably, the interior of the outer ring of the sealing ring is composed of a first component material, a second component material and a third component material, the second component material is provided at the connection of the first component material, and the third component material is provided at the connection of the second component material.

[0010] Preferably, the first component material is made of silicone rubber, the second component material is made of EPDM rubber, and the third component material is made of nitrile rubber.

[0011] Preferably, the first top sealing gasket, the middle layer of the sealing ring, the second top sealing gasket and the outer ring of the sealing ring are made of the same material.

[0012] Preferably, the interior of the filling cavity may be filled with an inert gas.

[0013] Preferably, the first magnet and the second magnet are used in cooperation with each other.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, by adopting the mutual repulsion reaction between the first magnet and the second magnet, a certain supporting force can be provided to the outermost layer of the middle layer of the sealing ring, and an inert gas is filled in the filling cavity to provide supporting force to the outermost side of the sealing ring. At the same time, a reinforcing ring is provided at the bottom of the sealing ring, and the reinforcing ring can also support the outer ring of the outer layer of the sealing ring. The three are used in conjunction with each other to provide a pre-tightening force for the sealing ring in the most original state. In this way, when the outer layer of the sealing ring shrinks at low temperature, the outer ring of the outer layer of the sealing ring can be pushed back to its original position through the above structure, thereby ensuring that the sealing ring is always in a good sealing state at low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the main structure of a sealing ring with low temperature resistance and high sealing performance provided by the utility model;

[0017] Figure 2 A schematic diagram of the main body of a sealing ring with low temperature resistance and high sealing performance provided by the utility model;

[0018] Figure 3 A bottom view schematic diagram of the main body of a sealing ring with low temperature resistance and high sealing performance provided by the utility model;

[0019] Figure 4 The utility model provides a sealing ring with low temperature resistance and high sealing performance Figure 3 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 5 The utility model provides a sealing ring with low temperature resistance and high sealing performance, and a schematic diagram of the material composition of the outer ring of the sealing ring.

[0021] Legend: 1. Inner ring of sealing ring; 2. Middle layer of sealing ring; 3. Mounting cavity; 4. First magnet; 5. Second magnet; 6. Outer ring of sealing ring; 601. First component material; 602. Second component material; 603. Third component material; 7. Filling cavity; 8. Mounting groove; 9. Reinforcement ring; 10. First top sealing gasket; 11. Second top sealing gasket. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0026] Example 1

[0027] like Figure 1-5As shown, the utility model provides a technical solution: a sealing ring with low temperature resistance and high sealing performance, comprising a sealing ring inner ring 1, a sealing ring middle layer 2 is arranged on the outer side of the sealing ring inner ring 1, a plurality of installation cavities 3 are opened inside the sealing ring middle layer 2, a first magnet 4 is arranged inside the plurality of installation cavities 3 and close to the outer side, a second magnet 5 is arranged inside the plurality of first magnets 4, a sealing ring outer ring 6 is arranged on the outer side of the sealing ring middle layer 2, a filling cavity 7 is opened inside the sealing ring outer ring 6, a mounting groove 8 is opened at the bottom of the sealing ring outer ring 6 and close to the outer side, a reinforcing ring 9 is arranged inside the mounting groove 8, and by using the first magnet The mutual repulsion reaction between the first magnet 4 and the second magnet 5 can provide a certain supporting force for the outermost layer of the sealing ring middle layer 2, and the filling cavity 7 is filled with inert gas to provide supporting force for the outermost side of the sealing ring. At the same time, a reinforcing ring 9 is provided at the bottom of the sealing ring, and the reinforcing ring 9 can also support the outer ring 6 of the outer layer of the sealing ring. The three are used in conjunction with each other to provide a pre-tightening force for the sealing ring in the most original state. In this way, when the outer layer of the sealing ring shrinks at low temperature, the outer ring 6 of the outer layer of the sealing ring can be pushed back to its original position through the above structure, thereby ensuring that the sealing ring is always in a good sealing state at low temperature.

[0028] Example 2

[0029] like Figure 1-5 As shown, the utility model provides a technical solution: a first top sealing gasket 10 is provided on the top of the sealing ring inner ring 1 and the sealing ring middle layer 2, and a second top sealing gasket 11 is provided on the top of the sealing ring outer ring 6.

[0030] The interior of the sealing ring outer ring 6 is composed of a first component material 601, a second component material 602 and a third component material 603. The second component material 602 is provided at the connection of the first component material 601, and the third component material 603 is provided at the connection of the second component material 602.

[0031] The material of the first component material 601 is silicone rubber, the material of the second component material 602 is EPDM rubber, and the material of the third component material 603 is nitrile rubber. Silicone rubber has excellent heat resistance, cold resistance, ozone resistance, atmospheric aging resistance, and good insulation performance. Its tensile strength and elongation are good. The general use temperature range is -55°C to 250°C. EPDM rubber has good weather resistance, ozone resistance, water resistance and chemical resistance, and can be used for alcohols and ketones. It can also be used for sealing in high-temperature water vapor environments. The general use temperature range is -55°C to 150°C. The general use temperature range of nitrile rubber is -40°C to 120°C. Therefore, when used under normal conditions, serious shrinkage usually does not occur, thereby maintaining good sealing.

[0032] The first top sealing gasket 10 , the sealing ring middle layer 2 , the second top sealing gasket 11 and the sealing ring outer ring 6 are made of the same material.

[0033] The interior of the filling cavity 7 can be filled with an inert gas. When the filling cavity 7 is filled with an inert gas, if the outer ring 6 of the sealing ring shrinks in a low-temperature environment, the inert gas inside the filling cavity 7 will support the outermost layer of the outer ring 6 of the sealing ring, so that the outermost layer of the outer ring 6 of the sealing ring will not shrink, causing large-scale leakage of the sealing ring, thereby improving the stability of the sealing ring in a low-temperature environment.

[0034] The first magnet 4 and the second magnet 5 cooperate with each other and repel each other, so when in use, the outer layer of the middle layer 2 of the sealing ring is further supported.

[0035] In summary, the outermost layer of the sealing ring outer ring 6 can be supported by filling the filling cavity 7 with inert gas in advance. When the filling cavity 7 is filled with inert gas, if the sealing ring outer ring 6 shrinks in a low temperature environment, the inert gas inside the filling cavity 7 will support the outermost layer of the sealing ring outer ring 6, so that the outermost layer of the sealing ring outer ring 6 will not shrink, causing large-scale leakage of the sealing ring, thereby improving the stability of the sealing ring in a low temperature environment.

[0036] It should be noted that the first component material 601, the second component material 602 and the third component material 603 of the sealing ring outer ring 6 are made of silicone rubber, EPDM rubber and nitrile rubber respectively. Silicone rubber has excellent heat resistance, cold resistance, ozone resistance, atmospheric aging resistance, and good insulation performance. Its tensile strength and elongation are good. The general operating temperature range is -55°C to 250°C. EPDM rubber has good weather resistance, ozone resistance, water resistance and chemical resistance. It can be used for alcohols and ketones, and can also be used for sealing in high-temperature water vapor environments. The general operating temperature range is -55°C to 150°C. The general operating temperature range of nitrile rubber is -40°C to 120°C. Therefore, it usually does not suffer serious shrinkage when used under normal conditions, thereby maintaining good sealing.

[0037] At the same time, a first magnet 4 and a second magnet 5 are arranged inside the installation cavity 3. The first magnet 4 and the second magnet 5 repel each other, so when in use, the outer layer of the sealing ring middle layer 2 will be further supported, and a mounting groove 8 is also opened at the bottom of the sealing ring outer ring 6. A reinforcing ring 9 is arranged inside the mounting groove 8. The reinforcing ring 9 is made of a harder material and is installed inside the sealing ring outer ring 6 to further support the bottom of the sealing ring outer ring 6. Through the above method, even at low temperatures, the materials of the sealing ring outer ring 6, the reinforcing ring 9, the first top sealing gasket 10 and the sealing ring middle layer 2 are diversified, and the synergistic effect of the materials can also enhance the sealing performance. The material used for the sealing ring outer ring 6 has good tensile properties and is recoverable when the temperature recovers. At the same time, the reinforcing ring 9, the first magnet 4, the second magnet 5 and the filling cavity 7 are filled with inert gas, so that the sealing ring outer ring 6 has a pre-tightening force, which provides a continuous and stable pre-tightening force for the sealing ring in a low temperature environment, ensuring that the sealing ring is always in a good sealing state.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing ring with low temperature resistance and high sealing performance, comprising a sealing ring inner ring (1), characterized in that: A sealing ring middle layer (2) is provided on the outer side of the sealing ring inner ring (1), a plurality of mounting cavities (3) are provided inside the sealing ring middle layer (2), a first magnet (4) is provided inside a plurality of the mounting cavities (3) and close to the outer side, and a second magnet (5) is provided inside a plurality of the first magnets (4); An outer sealing ring (6) is provided on the outer side of the sealing ring middle layer (2), a filling cavity (7) is provided inside the sealing ring outer ring (6), a mounting groove (8) is provided at the bottom of the sealing ring outer ring (6) and close to the outer side, and a reinforcing ring (9) is provided inside the mounting groove (8).

2. The sealing ring with low temperature resistance and high sealing performance according to claim 1, characterized in that: A first top sealing gasket (10) is provided on the top of the sealing ring inner ring (1) and the sealing ring middle layer (2), and a second top sealing gasket (11) is provided on the top of the sealing ring outer ring (6).

3. A sealing ring with low temperature resistance and high sealing performance according to claim 2, characterized in that: The interior of the sealing ring outer ring (6) is composed of a first component material (601), a second component material (602) and a third component material (603); the second component material (602) is provided at the connection of the first component material (601), and the third component material (603) is provided at the connection of the second component material (602).

4. The sealing ring with low temperature resistance and high sealing performance according to claim 3 is characterized in that: The material of the first component material (601) is silicone rubber, the material of the second component material (602) is EPDM rubber, and the material of the third component material (603) is nitrile rubber.

5. The sealing ring with low temperature resistance and high sealing performance according to claim 4, characterized in that: The first top sealing gasket (10), the sealing ring middle layer (2), the second top sealing gasket (11) and the sealing ring outer ring (6) are made of the same material.

6. The sealing ring with low temperature resistance and high sealing performance according to claim 1, characterized in that: The interior of the filling chamber (7) can be filled with an inert gas.

7. The sealing ring with low temperature resistance and high sealing performance according to claim 1, characterized in that: The first magnet (4) and the second magnet (5) are used in conjunction with each other.

Images