Novel fracture-resistant ethylene-propylene-diene monomer elastic sealing gasket

Abstract

The utility model discloses a novel fracture-resistant ethylene-propylene-diene monomer elastic sealing gasket which comprises a sealing gasket base body, a plurality of attaching strips are arranged at the top of the sealing gasket base body, fiber reinforcing strips are arranged in the attaching strips, a cavity is formed in the sealing gasket base body, and a plurality of arc-shaped elastic supporting pieces are evenly fixed in the cavity. A silicon rubber buffer layer is filled in a gap between the cavity and the arc-shaped elastic supporting sheet, a reinforcing structure is arranged in the middle of the sealing gasket base body, and the reinforcing structure comprises a polyester fiber net layer, a fiber reinforcing layer and an elastic buffer layer; the ethylene-propylene-diene monomer elastic sealing gasket has higher tensile strength and tear resistance, and is effectively prevented from being broken under long-term mechanical stress; the polyester fiber net layer, the fiber reinforcement layer and the elastic buffer layer in the reinforcement structure have a synergistic effect, so that the overall strength and stability of the sealing gasket are improved, the expansion of cracks can be effectively prevented, and the long-term reliability of the sealing gasket is ensured.

Description

Technical Field

[0001] This utility model relates to the field of EPDM elastic sealing gasket technology, specifically a novel EPDM elastic sealing gasket that is resistant to breakage. Background Technology

[0002] Ethylene propylene diene monomer (EPDM) elastic sealing gaskets are high-performance elastic sealing materials based on EPDM rubber. EPDM rubber is a semi-crystalline ethylene-propylene-diene terpolymer, known for its low diene content, low viscosity, and low unsaturation.

[0003] However, traditional EPDM gaskets have some drawbacks:

[0004] (1) First, their tensile strength is insufficient, which makes the gaskets prone to breakage under long-term mechanical stress;

[0005] (2) Secondly, their tear resistance is poor, which makes the edges of the gaskets prone to gaps, and these gaps may expand further. Utility Model Content

[0006] The purpose of this invention is to provide a novel EPDM elastic sealing gasket that is resistant to breakage, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel EPDM elastic sealing gasket with fracture resistance, comprising a sealing gasket substrate, a plurality of bonding strips on the top of the sealing gasket substrate, fiber reinforcing strips inside the bonding strips, a cavity inside the sealing gasket substrate, a plurality of arc-shaped elastic support pieces uniformly fixed inside the cavity, a silicone rubber buffer layer filling the gap between the cavity and the arc-shaped elastic support pieces, and a reinforcing structure in the middle of the sealing gasket substrate, the reinforcing structure comprising a polyester fiber web layer, a fiber reinforcing layer and an elastic buffer layer, the fiber reinforcing layer being disposed inside the elastic buffer layer, and the elastic buffer layer being disposed inside the polyester fiber web layer.

[0008] The polyester fiber mesh layer in the reinforcing structure works synergistically with the cavity to prevent crack propagation, and the polyester fiber mesh layer is bonded to the sealing gasket matrix through vulcanization; the elastic buffer layer provides elastic cushioning; the fiber reinforcement layer improves the overall fracture resistance of the sealing gasket; the fiber reinforcing strip improves the fracture resistance of the bonding strip; and the arc-shaped elastic support sheet and silicone rubber buffer layer reduce stress concentration under dynamic loads.

[0009] Preferably, the sealing gasket substrate has serrated edges on its sides, and the serrated edges are coated with a polytetrafluoroethylene layer. The function of the serrated edges and the polytetrafluoroethylene layer is to reduce stress concentration.

[0010] Preferably, the gap between the adhesive strip and the top of the sealing gasket substrate forms an adhesive groove, and both the top of the adhesive strip and the bottom of the adhesive groove are provided with anti-slip textures. The protective textures are designed to increase the friction between the adhesive groove and the adhesive strip when they are bonded together, ensuring stability during bonding.

[0011] Preferably, the bottom of the sealing gasket substrate is coated with a wear-resistant layer, which is used to improve the wear resistance of the bottom of the sealing gasket substrate.

[0012] Preferably, both the sealing gasket substrate and the bonding strip are made of EPDM rubber.

[0013] Preferably, both the fiber reinforcing strip and the fiber reinforcing layer are made of glass fiber, and the elastic buffer layer is made of polyurethane foam.

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

[0015] 1. Significantly improved fracture resistance: Through the addition of fiber reinforcing strips, fiber reinforcement layers, arc-shaped elastic support sheets, and silicone rubber buffer layers, the EPDM elastic sealing gasket of this invention has higher tensile strength and tear resistance, effectively preventing fracture under long-term mechanical stress.

[0016] 2. Synergistic Reinforcement Structure: The polyester fiber web, fiber reinforcement layer, and elastic buffer layer in the reinforcement structure work synergistically to not only improve the overall strength and stability of the gasket, but also effectively prevent crack propagation and ensure the long-term reliability of the gasket. Attached Figure Description

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

[0018] Figure 2 This is a cross-sectional view of the sealing gasket substrate in this utility model;

[0019] Figure 3 This is a schematic diagram of the bonding strip in this utility model;

[0020] Figure 4 This is a schematic diagram of the fiber reinforcing strip in this utility model.

[0021] In the diagram: 1. Sealing gasket substrate; 2. Polyester fiber mesh layer; 3. Wear-resistant layer; 4. Fiber reinforcement layer; 5. Serrated strip; 6. Adhesive groove; 7. Adhesive strip; 8. Cavity; 9. Elastic buffer layer; 10. Arc-shaped elastic support sheet; 11. Silicone rubber buffer layer; 12. Anti-slip texture; 13. Fiber reinforcement strip. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figure 1-4 This utility model provides a novel EPDM elastic sealing gasket that is resistant to breakage. It includes a sealing gasket base 1, a plurality of bonding strips 7 on the top of the sealing gasket base 1, fiber reinforcing strips 13 inside the bonding strips 7, a cavity 8 inside the sealing gasket base 1, a plurality of arc-shaped elastic support pieces 10 uniformly fixed inside the cavity 8, a silicone rubber buffer layer 11 filling the gap between the cavity 8 and the arc-shaped elastic support pieces 10, and a reinforcing structure in the middle of the sealing gasket base 1. The reinforcing structure includes a polyester fiber web layer 2, a fiber reinforcing layer 4 and an elastic buffer layer 9. The fiber reinforcing layer 4 is disposed inside the elastic buffer layer 9, and the elastic buffer layer 9 is disposed inside the polyester fiber web layer 2.

[0024] Specifically, the polyester fiber mesh layer 2 in the reinforcing structure can work synergistically with the cavity 8 to prevent crack propagation, and the polyester fiber mesh layer 2 is bonded to the sealing gasket matrix 1 through vulcanization; while the elastic buffer layer 9 plays an elastic buffering role; the fiber reinforcement layer 4 can improve the overall fracture resistance of the sealing gasket; the fiber reinforcing strip 13 can improve the fracture resistance of the bonding strip 7; the arc-shaped elastic support sheet 10 and the silicone rubber buffer layer 11 can reduce stress concentration under dynamic loads.

[0025] The sealing gasket substrate 1 has serrated strips 5 on its side, and the serrated strips 5 are coated with a polytetrafluoroethylene layer.

[0026] Specifically, the serrated edge 5, with its irregular shape, can disperse the stress borne by the gasket, while the PTFE layer has excellent lubrication properties, which can further reduce stress concentration and improve the service life of the gasket.

[0027] The bonding strip 7 and the top gap of the sealing gasket base 1 form a bonding groove 6, and both the top of the bonding strip 7 and the bottom of the bonding groove 6 are provided with anti-slip textures 12.

[0028] Specifically, the anti-slip texture 12 design increases the friction between the bonding strip 7 and the bonding groove 6, ensuring that the gasket will not slide or shift during installation or use, thus improving the stability and reliability of the gasket.

[0029] The bottom of the sealing gasket substrate 1 is coated with a wear-resistant layer 3.

[0030] Specifically, the wear-resistant layer 3 is made of high-hardness wear-resistant material, which can effectively resist external wear and scratches and extend the service life of the sealing gasket.

[0031] Both the sealing gasket substrate 1 and the bonding strip 7 are made of EPDM rubber. The fiber reinforcing strip 13 and the fiber reinforcing layer 4 are made of glass fiber, and the elastic buffer layer 9 is made of polyurethane foam.

[0032] In practical use, operators can install the sealing gasket into the corresponding equipment or structure according to actual needs. Since both the sealing gasket substrate 1 and the bonding strip 7 are made of EPDM rubber, this material has good elasticity and corrosion resistance, enabling it to adapt to various complex working environments. Simultaneously, the fiber reinforcing strip 13 and fiber reinforcing layer 4 further improve the sealing gasket's fracture resistance, allowing it to maintain its integrity even under significant mechanical stress. The wear-resistant layer 3 effectively extends the service life of the sealing gasket, reduces replacement frequency, and lowers maintenance costs. Furthermore, the synergistic effect of the silicone rubber buffer layer 11 and the arc-shaped elastic support piece 10 reduces stress concentration under dynamic loads, improving the dynamic stability of the sealing gasket.

[0033] 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 novel fracture-resistant EPDM elastic sealing gasket, comprising a sealing gasket substrate (1), characterized in that, The sealing pad substrate (1) has multiple bonding strips (7) on its top. The bonding strips (7) have fiber reinforcing strips (13) inside. The sealing pad substrate (1) has a cavity (8) inside. Multiple arc-shaped elastic support pieces (10) are uniformly fixed inside the cavity (8). The gap between the cavity (8) and the arc-shaped elastic support pieces (10) is filled with a silicone rubber buffer layer (11). The sealing pad substrate (1) has a reinforcing structure in the middle. The reinforcing structure includes a polyester fiber web layer (2), a fiber reinforcing layer (4), and an elastic buffer layer (9). The fiber reinforcing layer (4) is located inside the elastic buffer layer (9), and the elastic buffer layer (9) is located inside the polyester fiber web layer (2).

2. The novel EPDM elastic sealing gasket with fracture resistance according to claim 1, characterized in that: The sealing gasket substrate (1) has a serrated strip (5) on its side, and the serrated strip (5) is coated with a polytetrafluoroethylene layer.

3. The novel EPDM elastic sealing gasket with fracture resistance according to claim 1, characterized in that: The bonding strip (7) and the top gap of the sealing gasket base (1) form a bonding groove (6), and the top of the bonding strip (7) and the bottom of the bonding groove (6) are provided with anti-slip texture (12).

4. The novel EPDM elastic sealing gasket with fracture resistance according to claim 1, characterized in that: The bottom of the sealing gasket substrate (1) is coated with a wear-resistant layer (3).

5. A novel EPDM elastic sealing gasket with fracture resistance according to claim 1, characterized in that: Both the sealing gasket substrate (1) and the bonding strip (7) are made of EPDM rubber.

6. The novel EPDM elastic sealing gasket with fracture resistance according to claim 1, characterized in that: The fiber reinforcing strip (13) and the fiber reinforcing layer (4) are both made of glass fiber, and the elastic buffer layer (9) is made of polyurethane foam.

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