A three-liquid ethylene propylene rubber elastic sealing gasket

Abstract

The utility model provides a kind of EPDM elastic sealing gasket, it is related to elastic sealing gasket technical field, including sealing gasket main part, the top of sealing gasket main part is equipped with boss, the inside of boss is equipped with circular absorption groove, the top of sealing gasket main part is equipped with rectangular absorption groove, the bottom of rectangular absorption groove is equipped with hexagonal absorption groove, the bottom of hexagonal absorption groove is equipped with first function hole, the bottom of first function hole is equipped with second function hole, repair capsule, conductive rubber, water-swelling rubber and optical fiber sensor are used, repair capsule can release repair material when sealing gasket is damaged, cooperate with conductive rubber and optical fiber sensor, can real-time monitoring sealing state and feedback abnormal deformation or leakage, prolong service life and reduce maintenance cost, adopt ladder platform water-swelling rubber, volume expansion fills contact surface gap after water, realize double waterproof and chemical corrosion resistance effect, suitable for complex working condition environment.

Description

Technical Field

[0001] This utility model relates to the field of elastic sealing gasket technology, and in particular to an EPDM rubber elastic sealing gasket. Background Technology

[0002] According to Chinese Patent No. CN215108935U, a EPDM rubber sealing gasket for pipe segment sealing includes two sets of sealing gasket bodies. Each set of sealing gasket bodies has a hydrophilic rubber strip embedded in it, and grooves adapted to the hydrophilic rubber strips are also formed on both sets of sealing gasket bodies for sealing. An inclined surface is formed on the sealing end face of each sealing gasket body. An inner core is fitted inside each hydrophilic rubber strip, and grooves are formed on the inner surface of the inner core or the inner surface of the hydrophilic rubber strip in contact with the inner core. A water inlet hole is provided on one side of each hydrophilic rubber strip. This EPDM rubber sealing gasket for pipe segment sealing, by embedding a hydrophilic rubber strip in the sealing gasket body, allows some water to be introduced from the outside into the inside, causing the hydrophilic rubber strip to expand from the inside. Due to the action of the inner core, it generates a reaction force radially outward, thus better fitting the groove. This reaction force is the same as the radial force of the groove, both being positive pressure, resulting in better sealing and improved sealing effect.

[0003] The aforementioned comparative documents and existing technologies have the following technical problems: Existing ethylene propylene diene monomer (EPDM) rubber is copolymerized from ethylene, propylene, and a small amount of diene. It has excellent resistance to ultraviolet radiation and acid and alkali corrosion, and can be exposed to harsh environments for a long time without aging. It has a low material density and can be filled with a high proportion of additives, reducing costs while ensuring elasticity. Its elastic deformation range is large, which can effectively fill sealing gaps and support multiple working temperatures. It is used for subway and tunnel segment splicing, and the composite structure prevents water seepage and adapts to segment displacement during construction. However, it will age and crack under long-term compression, and the cracks cannot be detected in time. Problems can only be discovered when they occur, which can lead to some hidden dangers that need to be dealt with in a timely manner. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a ternary propylene diene monomer (EPDM) rubber elastic sealing gasket.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an EPDM rubber elastic sealing gasket, comprising a sealing gasket body, a boss on the top of the sealing gasket body, a circular absorption groove inside the boss, a rectangular absorption groove at the top of the sealing gasket body, a hexagonal absorption groove at the bottom of the rectangular absorption groove, a first functional hole at the bottom of the hexagonal absorption groove, and a second functional hole at the bottom of the first functional hole.

[0006] Preferably, the outer top of the two protrusions on both sides of the top of the sealing gasket body is chamfered, and a groove of the same size as the protrusion is provided between the protrusions.

[0007] Preferably, the bottom end of the hexagonal absorption groove is provided with an internal groove, the inside of the internal groove is provided with a repair capsule, and the two ends of the internal groove are provided with sealing gaskets.

[0008] Preferably, the interior of the first functional hole is provided with conductive rubber, and the interior of the conductive rubber is provided with an optical fiber sensor.

[0009] Preferably, the interior of the second functional hole is provided with water-swellable rubber, and the water-swellable rubber is in the shape of a trapezoid.

[0010] Preferably, the bottom end of the sealing gasket body is provided with a groove, and the inside of the groove is provided with a wear-resistant strip, which is embedded in the groove and closely attached to the groove.

[0011] Preferably, the surface of the sealing gasket body is provided with a high cross-linking density layer formed by peroxide vulcanization, and the core is provided with a sulfur vulcanization layer.

[0012] Beneficial effects

[0013] In this invention, a boss, a circular absorption groove, a rectangular absorption groove, and a hexagonal absorption groove are used. The boss, circular absorption groove, rectangular absorption groove, and hexagonal absorption groove at the top of the sealing gasket body form a multi-layer buffer and stress dispersion structure, which can effectively absorb mechanical vibration and impact energy. At the same time, it compensates for local gaps or offsets of the sealing surface through elastic deformation, which significantly improves the sealing stability. Furthermore, the boss, circular absorption groove, rectangular absorption groove, and hexagonal absorption groove are all branched and not on a parallel line, which can better buffer and disperse stress.

[0014] This invention employs a repair capsule, conductive rubber, water-swellable rubber, and a fiber optic sensor. The built-in repair capsule at the bottom of the hexagonal absorption groove can release repair material when the sealing gasket is damaged. Combined with the conductive rubber and fiber optic sensor in the first functional hole, it can monitor the sealing status in real time and report abnormal deformation or leakage, extending service life and reducing maintenance costs. The second functional hole uses trapezoidal water-swellable rubber, which expands in volume after contact with water to fill the gaps on the contact surface. Combined with the acid, alkali, and salt water resistance properties of EPDM rubber itself, it achieves dual waterproof and chemical corrosion resistance, making it suitable for complex working environments. Attached Figure Description

[0015] Figure 1 This is an isometric view of the present invention;

[0016] Figure 2 This is a front view of the present invention;

[0017] Figure 3 This is a front sectional view of the present invention;

[0018] Figure 4 This is a side sectional view of the present invention.

[0019] Legend:

[0020] 1. Sealing gasket body; 2. Boss; 3. Circular absorption groove; 4. Rectangular absorption groove; 5. Hexagonal absorption groove; 501. Internal groove; 502. Repair capsule; 6. First functional hole; 601. Conductive rubber; 602. Fiber optic sensor; 7. Second functional hole; 701. Water-swellable rubber; 8. Wear-resistant strip. Detailed Implementation

[0021] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0022] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0024] Reference Figure 1-4This utility model provides a EPDM rubber elastic sealing gasket, including a sealing gasket body 1. The surface of the sealing gasket body 1 is provided with a high cross-linking density layer formed by peroxide vulcanization, and the core is provided with a sulfur vulcanization layer. The top of the sealing gasket body 1 is provided with a boss 2, and the outer top of the two bosses 2 on both sides of the top of the sealing gasket body 1 is provided with a chamfer. A groove of the same size as the boss 2 is provided between the bosses 2. A circular absorption groove 3 is provided inside the boss 2. A rectangular absorption groove 4 is provided at the top of the sealing gasket body 1. A hexagonal absorption groove 5 is provided at the bottom of the rectangular absorption groove 4. An internal groove 501 is provided at the bottom of the hexagonal absorption groove 5. A repair capsule 502 is provided inside the internal groove 501. Sealing gasket blocks are provided at both ends of the internal groove 501. A first functional hole 6 is provided at the bottom of the hexagonal absorption groove 5. Conductive rubber 601 is provided inside the first functional hole 6. An optical fiber sensor 602 is provided inside the conductive rubber 601. A second functional hole 602 is provided at the bottom of the first functional hole 6. The second functional hole 7 has a water-swellable rubber 701 inside, which is shaped like a trapezoid. The bottom end of the sealing gasket body 1 has a groove, and the inside of the groove has a wear-resistant strip 8. The wear-resistant strip 8 is embedded in the groove and fits tightly between the groove. It uses a repair capsule 502, conductive rubber 601, water-swellable rubber 701 and fiber optic sensor 602. The built-in repair capsule 502 at the bottom of the hexagonal absorption groove 5 can release repair material when the sealing gasket is damaged. In conjunction with the conductive rubber 601 and fiber optic sensor 602 in the first functional hole 6, the sealing status can be monitored in real time and abnormal deformation or leakage can be reported, which can extend the service life and reduce maintenance costs. The second functional hole 7 uses a trapezoidal water-swellable rubber 701, which expands in volume after contact with water to fill the gaps on the contact surface. Combined with the acid, alkali and salt water resistance of EPDM rubber itself, it achieves double waterproof and chemical corrosion resistance, which is suitable for complex working environments. Specific Implementation Example 2:

[0026] Reference Figure 1 Ring-shaped neodymium iron boron magnets are pre-embedded at the edge of the sealing gasket, arranged in an alternating N / S pole distribution pattern. The spacing between adjacent magnets is optimized through finite element simulation to ensure uniform magnetic field strength distribution. The magnets are embedded in the middle layer of the sealing gasket, and the outer layer is covered with a EPDM rubber protective layer to avoid direct contact with external media that could lead to corrosion or detachment. A hot-pressing molding process is used to simultaneously vulcanize the magnets and EPDM rubber. The coupling agent KH550 is used to enhance the bonding strength between the magnets and the rubber interface. The surface of the magnets is pre-coated with a graphene-modified layer to reduce the coefficient of friction and prevent the magnets from sticking to the metal surface of the pipe segment during assembly.

[0027] In summary:

[0028] 1. By employing bosses 2, circular absorption grooves 3, rectangular absorption grooves 4, and hexagonal absorption grooves 5, a multi-layer buffer and stress dispersion structure is formed, which can effectively absorb mechanical vibration and impact energy. At the same time, it can significantly improve sealing stability by compensating for local gaps or offsets of the sealing surface through elastic deformation.

[0029] 2. By employing a repair capsule 502, conductive rubber 601, water-swellable rubber 701, and fiber optic sensor 602, the repair capsule 502 can release repair material when the sealing gasket is damaged. Combined with the conductive rubber 601 and fiber optic sensor 602, the sealing status can be monitored in real time and abnormal deformation or leakage can be reported, extending service life and reducing maintenance costs. The trapezoidal water-swellable rubber 701 expands upon contact with water to fill gaps in the contact surface, achieving dual waterproofing and chemical corrosion resistance.

[0030] Suitable for complex working environments.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A EPDM rubber elastic sealing gasket, comprising a sealing gasket body (1), characterized in that: The sealing gasket body (1) has a boss (2) on the top, a circular absorption groove (3) inside the boss (2), a rectangular absorption groove (4) at the top of the sealing gasket body (1), a hexagonal absorption groove (5) at the bottom of the rectangular absorption groove (4), a first functional hole (6) at the bottom of the hexagonal absorption groove (5), and a second functional hole (7) at the bottom of the first functional hole (6).

2. The EPDM rubber elastic sealing gasket according to claim 1, characterized in that: The outer top of the two protrusions (2) on both sides of the top of the sealing gasket body (1) is chamfered, and a groove of the same size as the protrusion (2) is provided between the protrusions (2).

3. The EPDM rubber elastic sealing gasket according to claim 1, characterized in that: The bottom end of the hexagonal absorption groove (5) is provided with an internal groove (501), the inside of the internal groove (501) is provided with a repair capsule (502), and the two ends of the internal groove (501) are provided with sealing gaskets.

4. The EPDM rubber elastic sealing gasket according to claim 1, characterized in that: The first functional hole (6) is provided with conductive rubber (601), and the conductive rubber (601) is provided with an optical fiber sensor (602).

5. The EPDM rubber elastic sealing gasket according to claim 1, characterized in that: The interior of the second functional hole (7) is provided with water-swellable rubber (701), which is shaped like a trapezoid.

6. The EPDM rubber elastic sealing gasket according to claim 1, characterized in that: The bottom end of the sealing gasket body (1) is provided with a groove, and the inside of the groove is provided with a wear-resistant strip (8), which is embedded in the groove and closely attached to the groove.

7. The EPDM rubber elastic sealing gasket according to claim 1, characterized in that: The surface of the sealing gasket body (1) is provided with a high cross-linking density layer formed by peroxide vulcanization, and the core is provided with a sulfur vulcanization layer.

Images