A multi-layer rubber seal ring resistant to extrusion

Abstract

This utility model discloses a compression-resistant multi-layer rubber sealing ring, relating to the field of sealing ring technology. It includes a protective layer with an elastic inner core inside, forming a multi-layer sealing ring. An interlayer is formed between the inner side of the protective layer and the outer side of the elastic inner core. The interlayer contains a compression-resistant structure, comprising a first compression-resistant layer and a second compression-resistant layer located within the interlayer. The first and second compression-resistant layers are respectively composed of equidistant, annularly distributed limiting ropes located on both sides of the interlayer. This compression-resistant multi-layer rubber sealing ring employs a mesh design combining wavy, non-elastic limiting ropes and elastic structural ropes in its compression-resistant interlayer structure. The limiting ropes are made of non-elastic fiber material and are vertically distributed in a wavy pattern, converting vertical pressure into horizontal stress to prevent lateral tearing caused by localized collapse. Simultaneously, the elastic structural ropes allow the sealing ring to undergo slight deformation under pressure to compensate.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring technology, specifically to a multi-layer rubber sealing ring that is resistant to compression. Background Technology

[0002] Multilayer rubber seals are sealing elements made of multiple layers of rubber materials and are commonly used in mechanical equipment to prevent liquid and gas leakage.

[0003] For example, Chinese Patent Publication No. CN219299922U discloses a rubber sealing ring, which includes: a sealing ring body, the sealing ring body being composed of a first wear-resistant layer, a first oxidation-resistant layer, a first connecting layer, a second connecting layer, a second oxidation-resistant layer, and a second wear-resistant layer; a support layer being provided in the middle of the sealing ring body; and a plurality of reinforcing rods being cross-fixed inside the support layer; the first wear-resistant layer and the second wear-resistant layer being made of nitrile rubber; and the first oxidation-resistant layer and the second oxidation-resistant layer being made of fluororubber; the first wear-resistant layer, the second oxidation-resistant layer, the first oxidation-resistant layer, and the second wear-resistant layer are stacked to form the sealing ring body. Through the above structure, the sealing ring will not break during use by cooperating with the reinforcing layers and reinforcing rods, thus avoiding losses.

[0004] When the sealing ring is subjected to a large load during operation, its side wall area is prone to excessive plastic deformation, which leads to local stress concentration and tearing failure. Under high pressure conditions, the excessive elastic-plastic deformation of the sealing ring will damage the structural integrity and easily cause sealing failure. Utility Model Content

[0005] The purpose of this invention is to provide a multi-layer rubber sealing ring that is resistant to compression, in order to solve the problem in the background art where, when the sealing ring is subjected to a large load during operation, its side wall area is prone to excessive plastic deformation, which leads to local stress concentration and tearing failure. Under high pressure conditions, the excessive elastic-plastic deformation of the sealing ring causes damage to the structural integrity and easily leads to sealing failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer rubber sealing ring resistant to compression, comprising a protective layer, wherein an elastic inner core is provided inside the protective layer, thereby forming a multi-layer sealing ring;

[0007] A sandwich layer is formed between the inner side of the protective layer and the outer side of the elastic inner core. The sandwich layer is provided with a pressure-resistant structure, which includes a first pressure-resistant layer and a second pressure-resistant layer located within the sandwich layer. The first pressure-resistant layer and the second pressure-resistant layer are respectively composed of limiting ropes that are equidistantly distributed in a ring on both sides inside the sandwich layer.

[0008] Preferably, the length direction of the limiting rope is perpendicular to the length direction of the first compressive layer, and the limiting rope is distributed in a wave-shaped structure within the interlayer.

[0009] Preferably, the first and second pressure-resistant layers further include fixing rings fixedly connected to the top and bottom of the limiting rope, with the fixing rings located at the top and bottom of the inner side of the interlayer.

[0010] Preferably, the first and second pressure-resistant layers further include structural ropes that are fixedly connected to the inner sides at equal intervals. The structural ropes are equally distributed on the limiting ropes, and the first and second pressure-resistant layers are spliced ​​together to form an integral structure that wraps around the outer side of the elastic inner core.

[0011] Preferably, the limiting rope is made of a non-elastic fiber material, the structural rope is made of an elastic material, and the limiting rope and the structural rope form a mesh structure.

[0012] Preferably, a reinforcing ring is fixedly connected inside the elastic inner core, and the reinforcing ring is made of metal.

[0013] Preferably, the protective layer is provided with equally spaced sealing rings at the top and bottom, and the sealing rings form a concentric circle structure at the top and bottom of the protective layer.

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

[0015] This is a multi-layered rubber sealing ring that is resistant to compression. The sandwiched compression-resistant structure adopts a mesh design that combines a wave-shaped non-elastic limiting rope with an elastic structural rope. The limiting rope is made of non-elastic fiber material and is distributed vertically in a wave shape. It can convert vertical pressure into horizontal stress and avoid side tearing caused by local collapse. At the same time, the elastic structural rope allows the sealing ring to undergo slight deformation under pressure to compensate.

[0016] The metal reinforcing ring can resist extreme axial or radial pressure, limit the compression depth of the elastic inner core, and ensure that the sandwich pressure-resistant structure is always in the best working condition. Under harsh conditions such as ultra-high pressure pipelines, it prevents the sealing ring from collapsing as a whole and failing due to excessive deformation under high pressure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the present invention.

[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4This is a schematic diagram of the reinforcing ring structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the compressive strength layer structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the limiting rope structure of this utility model.

[0023] In the diagram: 1. Protective layer; 2. Elastic inner core; 3. First compression-resistant layer; 4. Second compression-resistant layer; 5. Limiting rope; 6. Fixing ring; 7. Structural rope; 8. Reinforcing ring; 9. Sealing 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] Example 1: Please refer to Figure 1 - Figure 6 This utility model provides the following technical solution: a multi-layered rubber sealing ring resistant to compression, comprising a protective layer 1, an elastic inner core 2 disposed inside the protective layer 1, thereby forming a multi-layered sealing ring; an interlayer is formed between the inner side of the protective layer 1 and the outer side of the elastic inner core 2, and an anti-compression structure is provided in the interlayer, the anti-compression structure comprising a first anti-compression layer 3 and a second anti-compression layer 4 located in the interlayer, the first anti-compression layer 3 and the second anti-compression layer 4 are respectively composed of limiting ropes 5 arranged in a ring at equal intervals on both sides inside the interlayer, the length direction of the limiting ropes 5 being perpendicular to the length direction of the first anti-compression layer 3, and the limiting ropes 5 being distributed in a wavy structure in the interlayer; the first anti-compression layer 3 and the second anti-compression layer 4 also include a fixed connection to the limiting ropes. 5. The top and bottom fixing rings 6 are located on the top and bottom of the interlayer. The first and second pressure-resistant layers 3 and 4 are also fixedly connected to the inner sides. The structural ropes 7 are equidistantly distributed on the limiting ropes 5. The first and second pressure-resistant layers 3 and 4 are spliced ​​together to form an integral structure wrapped around the outer side of the elastic inner core 2. The limiting ropes 5 are made of non-elastic fiber material, and the structural ropes 7 are made of elastic material. The limiting ropes 5 and the structural ropes 7 form a mesh structure. The elastic inner core 2 is fixedly connected to a reinforcing ring 8. The reinforcing ring 8 is made of metal. The top and bottom of the protective layer 1 are provided with equidistantly distributed sealing rings 9. The sealing rings 9 form a concentric circle structure at the top and bottom of the protective layer 1.

[0026] The first and second pressure-resistant layers 3 and 4 wrap around the outer side of the elastic inner core 2 to form a protective net. Each of the first and second pressure-resistant layers 3 and 4 is composed of multiple limiting ropes 5. The length direction of the limiting ropes 5 is perpendicular to the length direction of the pressure-resistant layer and is distributed in a wave shape. When external pressure is applied to the protective layer 1, the protective layer 1 compresses the elastic inner core 2 inward. However, the wave-shaped limiting ropes 5, as non-elastic fiber material, will immediately restrict the vertical compression movement. The wavy tortuous path absorbs part of the stress and disperses it in the horizontal direction, preventing the elastic inner core 2 from collapsing excessively. At the same time, the fixing rings 6 are located at the top and bottom of the interlayer, anchoring the limiting ropes 5 to the inside of the interlayer, ensuring that the wave structure is stable and does not shift under pressure, and maintaining the uniformity of the equidistant distribution.

[0027] The structural rope 7 is made of elastic material and is equidistantly distributed on the limiting rope 5, forming a mesh support inside the first and second compression layers 3 and 4. When the sealing ring is compressed, the elasticity of the structural rope 7 allows the interlayer to expand and contract slightly, compensating for instantaneous deformation. The inelasticity of the limiting rope 5 provides rigid constraint, preventing the structural rope 7 from overstretching and ensuring that the sealing ring can adapt to small displacements. The wavy vertical distribution of the limiting rope 5 prevents the compression from exceeding the limit. The mesh structure formed enhances the overall strength and durability, and balances the stress in all directions. Under high compression, the structural rope 7 preferentially absorbs some energy, and then the wavy limiting rope 5 guides the stress distribution, avoiding local stress concentration that could lead to breakage. The fixing effect of the fixing ring 6 further enhances stability, preventing the mesh structure from loosening or misaligning, thereby maintaining the integrity of the sealing ring.

[0028] The reinforcing ring 8 is located inside the elastic inner core 2. As a rigid frame made of metal, it resists a wide range of axial or radial forces, preventing the sealing ring from collapsing under extreme compression. Under normal sealing conditions, the reinforcing ring 8 maintains its shape stability. When the elastic inner core 2 is compressed, the metal frame limits its compression depth, ensuring that the sandwich anti-compression structure has sufficient space to operate. In addition, the reinforcing ring 8 is spliced ​​with the first anti-compression layer 3 and the second anti-compression layer 4. External stress is first buffered by the protective layer 1 and the sandwich, and then the reinforcing ring 8 absorbs the residual energy. The rigid design of the reinforcing ring 8 prevents excessive deformation inside the sealing ring, and by aligning with the vertical distribution of the limiting rope 5, it maintains the uniformity of the overall stress distribution.

[0029] The equidistant sealing rings 9 at the top and bottom of the seal form a concentric circle structure. When the sealing ring is installed, these sealing rings 9 first contact the connection surface, creating local sealing points, and expand uniformly under pressure to fill the gaps. The protective layer 1, as the outer layer, provides chemical and physical barriers to prevent degradation caused by exposure of the elastic inner core 2. When the sealing ring is compressed, the sandwich anti-compression structure limits the compression of the elastic inner core 2, ensuring that the sealing ring 9 does not flatten excessively and lose its sealing effect. The elasticity of the structural rope 7 maintains the compression consistency of the sealing ring 9, while the constraint of the limiting rope 5 prevents the twisting of the ring body. The greater the pressure, the more activated the anti-compression structure becomes, supporting the sealing ring 9 to maintain a constant sealing force. Even in high-pressure systems, the concentric circle design of the sealing ring 9 can adapt to slightly uneven surfaces and prevent leakage through multi-layer protection.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compression-resistant multilayer rubber sealing ring, comprising a protective layer (1), wherein an elastic inner core (2) is disposed inside the protective layer (1), thereby forming a multilayer sealing ring; Its features are: A sandwich layer is formed between the inner side of the protective layer (1) and the outer side of the elastic inner core (2). The sandwich layer is provided with a pressure-resistant structure, which includes a first pressure-resistant layer (3) and a second pressure-resistant layer (4) located in the sandwich layer. The first pressure-resistant layer (3) and the second pressure-resistant layer (4) are respectively composed of limiting ropes (5) that are equidistantly distributed in a ring on both sides inside the sandwich layer.

2. The compression-resistant multilayer rubber sealing ring according to claim 1, characterized in that: The length direction of the limiting rope (5) is perpendicular to the length direction of the first pressure-resistant layer (3), and the limiting rope (5) is distributed in a wave-shaped structure within the interlayer.

3. The compression-resistant multilayer rubber sealing ring according to claim 2, characterized in that: The first pressure-resistant layer (3) and the second pressure-resistant layer (4) further include fixing rings (6) fixedly connected to the top and bottom of the limiting rope (5), with the fixing rings (6) located at the top and bottom of the inner side of the interlayer.

4. The compression-resistant multilayer rubber sealing ring according to claim 3, characterized in that: The first pressure-resistant layer (3) and the second pressure-resistant layer (4) also include structural ropes (7) that are fixedly connected to the two sides of the interior and are distributed at equal intervals. The structural ropes (7) are distributed at equal intervals on the limiting rope (5). The first pressure-resistant layer (3) and the second pressure-resistant layer (4) are spliced ​​together to form an integral structure that wraps around the outside of the elastic inner core (2).

5. The compression-resistant multilayer rubber sealing ring according to claim 4, characterized in that: The limiting rope (5) is made of non-elastic fiber material, and the structural rope (7) is made of elastic material. The limiting rope (5) and the structural rope (7) form a mesh structure.

6. The compression-resistant multilayer rubber sealing ring according to claim 5, characterized in that: The elastic inner core (2) is fixedly connected to a reinforcing ring (8), which is made of metal.

7. The compression-resistant multilayer rubber sealing ring according to claim 6, characterized in that: The protective layer (1) is provided with equally spaced sealing rings (9) at the top and bottom, and the sealing rings (9) form a concentric circle structure at the top and bottom of the protective layer (1).

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