Self-adhesive grommet for saddle
By designing a self-adhesive saddle rubber gasket, using a rubber ring made of polyethylene and 3M adhesive, and incorporating an internal sealing ring, the problem of existing saddle rubber gaskets being hard and prone to aging is solved, achieving efficient sealing and improved durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HELI ENG MATERIALS CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-05
AI Technical Summary
Existing saddle rubber gaskets are hard, lack elasticity, are prone to aging, cannot fully adhere to the waterproof membrane, are troublesome to install and are prone to water seepage, and traditional bonding methods are inefficient and not strong.
The rubber ring is made of polyethylene, with 3M adhesive and sealant on the outer surface and a sealing ring on the inner surface. The rubber ring is made of methyl vinyl silicone rubber and is designed in a saddle shape to fit tightly to the waterproof membrane and drainage pipe. The self-adhesive design simplifies construction.
It improves waterproofing effectiveness and construction efficiency, enhances sealing reliability, durability and resistance to environmental changes, reduces the risk of leakage, and improves the overall performance of the tunnel waterproofing system.
Smart Images

Figure CN224326805U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waterproof engineering technology, and in particular to a self-adhesive saddle rubber gasket. Background Technology
[0002] Currently, in tunnel waterproofing and drainage construction, waterproof membranes are typically used for waterproofing, and blind drainage pipes are used for water collection and drainage. After the initial tunnel support is completed, longitudinal and circumferential blind drainage pipes are pre-embedded, followed by the laying of geotextile and waterproof membranes. To form a closed waterproof structure, the waterproof membrane needs to be reverse-wrapped at the bottom of the tunnel sidewall, enclosing the blind drainage pipes on the inside. However, this reverse wrapping prevents the blind drainage pipes from connecting to the tunnel side ditch. Therefore, a round hole needs to be made in the waterproof membrane at the point where the blind drainage pipe connects to the side ditch, allowing the blind drainage pipe to pass through. This results in a gap where the blind drainage pipe passes through the waterproof membrane, which can allow water to seep in, affecting the waterproofing effect of the membrane. Therefore, this gap needs to be filled to prevent water seepage. During construction, saddle-shaped rubber gaskets are used to patch the gap and act as a water stopper.
[0003] Currently, the saddle rubber gaskets used in construction are mostly made of recycled rubber. The material is too hard and cannot fully fit the curved surface of the waterproof membrane during construction. It lacks elasticity and is prone to cracking during construction. It also ages easily. Ordinary rubber will show signs of aging after a certain period of time, and after aging, it will crack, losing the purpose of patching. The operation is also troublesome. During the installation of existing saddle rubber gaskets, construction workers need to use structural adhesive to bond and seal them on site. This operation is not only labor-intensive, but also prone to water leakage at certain points due to uneven application of adhesive.
[0004] Therefore, a self-adhesive saddle rubber gasket is proposed to address the above problems. Utility Model Content
[0005] To address the shortcomings of existing technologies, the saddle rubber gaskets currently used in construction are mostly made of recycled rubber. This material is too hard, making it impossible to fully adhere to the curved surface of the waterproofing membrane during construction. It also lacks elasticity, making it prone to cracking and aging. Ordinary rubber will age and crack after a certain period, rendering the patch ineffective and cumbersome. Existing saddle rubber gaskets require on-site bonding and sealing with structural adhesive during installation, which is labor-intensive and prone to uneven adhesive application leading to water leakage at certain points. Therefore, a self-adhesive saddle rubber gasket is proposed.
[0006] The technical solution adopted by this utility model to solve its technical problem is: a self-adhesive saddle rubber gasket, including a rubber ring, a drain pipe fixedly connected to the inner surface of the rubber ring, an adhesive backing provided on the outer surface of the rubber ring, and two adhesive seals pasted on the outer surface of the adhesive backing.
[0007] Preferably, the outer surface of the rubber ring is saddle-shaped.
[0008] Preferably, the adhesive backing is 3M adhesive.
[0009] Preferably, both sealants are made of polyethylene.
[0010] Preferably, the rubber ring is made of methyl vinyl silicone rubber.
[0011] Preferably, a plurality of sealing rings are fixedly connected to the inner surface of the rubber ring, and the plurality of sealing rings are linearly and equidistantly distributed.
[0012] Preferably, the cross-section of each of the sealing rings is triangular.
[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0014] 1. This utility model provides a self-adhesive saddle rubber gasket. By setting the rubber ring to be made of polyethylene, it has excellent flexibility, elasticity and extensibility, and can tightly fit the curved surface of the waterproof membrane and the outer wall of the drainage pipe to form an effective seal and prevent water leakage. Its aging resistance and high and low temperature resistance ensure stable performance during long-term use and will not lose its waterproof effect due to material aging and cracking. In addition, this material is well matched with 3M adhesive, further enhancing the adhesion and sealing reliability. It effectively solves the problems of traditional saddle rubber gaskets, such as hardness, insufficient elasticity, easy aging and poor adhesion, and significantly improves the quality and durability of tunnel waterproofing construction.
[0015] 2. This utility model provides a self-adhesive saddle rubber gasket. By setting an adhesive backing and an adhesive seal, the self-adhesive saddle rubber gasket has an adhesive backing on the contact surface with the waterproof membrane. The adhesive backing uses 3M adhesive, which has a better compatibility with silicone and waterproof membrane. During construction, it can be firmly adhered to the waterproof membrane simply by tearing off the adhesive seal. The adhesive also plays a waterproof role. The other end of the gasket will tightly wrap around the outer wall of the drainage blind pipe due to the good extensibility of silicone, forming a self-sealed space.
[0016] 3. This utility model provides a self-adhesive saddle rubber gasket. By setting a sealing ring, it can significantly enhance the sealing performance between the rubber ring and the drainage pipe, effectively preventing water leakage between them and ensuring waterproofing. The setting of the sealing ring further improves the reliability of waterproofing, making it better adaptable to the complex environmental conditions inside the tunnel, reducing the risk of leakage, and improving the performance and durability of the entire waterproofing system. The triangular cross-section design of the sealing ring allows it to fit more tightly against the outer wall of the drainage pipe, filling the tiny gaps between them at multiple angles. This tight fit not only significantly enhances the sealing effect but also effectively prevents water from seeping in from the contact surface, reducing the risk of leakage. At the same time, the triangular structure helps to disperse stress and reduce the risk of local stress concentration, thereby improving the stability of the connection between the rubber ring and the drainage pipe. In the complex tunnel environment, this design can ensure the reliability of the sealing performance and maintain a good sealing effect even under long-term use or environmental changes, effectively improving the overall performance and durability of tunnel waterproofing. 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 diagram illustrating the explosion effect of the adhesive backing and rubber ring of this utility model;
[0019] Figure 3 This is a schematic diagram illustrating the explosion effect of the adhesive backing and sealant of this utility model.
[0020] Figure 4 This is a schematic diagram of the sealing ring structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the sealing ring of this utility model.
[0022] In the diagram: 1. Rubber ring; 2. Drain pipe; 3. Adhesive backing; 4. Seal; 5. Sealing ring. Detailed Implementation
[0023] 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.
[0024] Specific implementation examples are given below.
[0025] Please see Figure 1 - Figure 5A self-adhesive saddle rubber gasket includes a rubber ring 1, a drain pipe 2 fixedly connected to the inner surface of the rubber ring 1, and an adhesive backing 3 on the outer surface of the rubber ring 1. Two adhesive seals 4 are adhered to the outer surface of the adhesive backing 3. In use, the drain pipe 2 is fixedly installed on the inner surface of the rubber ring 1, and then the rubber ring 1 is pressed tightly against the contact surface of a waterproof membrane. By tearing open the adhesive seals 4, the adhesive backing 3 on the rubber ring 1 can be adhered to the waterproof membrane. This provides a better fit, and the adhesive backing 3 provides waterproofing. Due to the good extensibility of silicone, the other end of the rubber ring 1 tightly wraps around the outer wall of the other drain pipe 2, forming a self-sealing space.
[0026] like Figure 1 and Figure 2 As shown, the outer surface of the rubber ring 1 is saddle-shaped, allowing it to tightly conform to the curved surface of the waterproof membrane, ensuring a seal at the connection with the drain pipe 2. Its curvature matches the shape of the drain pipe 2, and the silicone's elasticity tightly wraps around the drain pipe 2, forming an effective sealed space. This shape not only enhances the waterproofing effect and prevents water seepage but also improves construction convenience and reduces the risk of leakage due to shape mismatch. This effectively solves the problem of traditional saddle-shaped rubber gaskets failing to fully conform to the curved surface of the waterproof membrane, ensuring the reliability and durability of the tunnel waterproofing system.
[0027] like Figure 2 As shown, the backing adhesive 3 is 3M adhesive. Its strong bonding performance ensures a firm and durable bond between the saddle rubber gasket and the waterproof membrane, effectively preventing water seepage due to weak adhesion. Its excellent sealing performance forms a reliable waterproof barrier at the bonding point, further enhancing the waterproofing effect. 3M adhesive's resistance to environmental changes allows it to maintain stable performance under the complex temperature and humidity conditions inside the tunnel and in long-term use environments. It is not prone to degradation due to aging or environmental factors, thus ensuring the long-term effectiveness of the waterproofing function. In addition, its good chemical corrosion resistance can resist the erosion of chemical substances that may be present in the tunnel, further improving the reliability and durability of the waterproofing system. At the same time, the ease of application of 3M adhesive greatly improves construction efficiency and reduces the possibility of rework due to uneven adhesive application or weak adhesion. This optimizes the overall quality and efficiency of tunnel waterproofing construction, providing stronger and more durable protection for the tunnel waterproofing system.
[0028] like Figure 3As shown, both seals 4 are made of polyethylene, which has good flexibility and impact resistance. It can effectively protect the 3M adhesive from contamination, damage or premature adhesion before use, ensuring that the adhesion and sealing properties of the backing adhesive 3 can be fully utilized during construction. This effectively prevents moisture from seeping in from gaps and improves the reliability of the waterproofing effect. At the same time, polyethylene material is easy to process into various shapes and sizes, which can closely fit the shape of the saddle rubber gasket, providing good protection. Its waterproofing performance can also further enhance the sealing of the entire waterproofing system. In addition, the polyethylene seal 4 has a low cost and high cost performance, making it suitable for large-scale tunnel construction applications and reducing the overall construction cost.
[0029] like Figure 1 and Figure 2 As shown, the rubber ring 1 is made of methyl vinyl silicone rubber, which has excellent flexibility, elasticity and ductility. It can closely fit the curved surface of the waterproof membrane and the outer wall of the drainage pipe 2 to form an effective seal and prevent water leakage. Its aging resistance and high and low temperature resistance ensure stable performance during long-term use and will not lose its waterproof effect due to material aging and cracking. In addition, this material is well matched with 3M adhesive 3, which further enhances the bonding firmness and sealing reliability. It effectively solves the problems of traditional saddle rubber gaskets, such as hardness, insufficient elasticity, easy aging and poor adhesion, and significantly improves the quality and durability of tunnel waterproofing construction.
[0030] like Figure 4 As shown, several sealing rings 5 are fixedly connected to the inner surface of the rubber ring 1. The sealing rings 5 are linearly and equidistantly distributed, which can significantly enhance the sealing performance between the rubber ring 1 and the drainage pipe 2, effectively prevent water from seeping between the two, ensure the waterproof effect, and the setting of sealing rings 5 further improves the reliability of waterproofing, enabling it to better adapt to the complex environmental conditions inside the tunnel, reduce the risk of leakage, and improve the performance and durability of the entire waterproofing system.
[0031] like Figure 5 As shown, the cross-sections of several sealing rings 5 are all triangular. The triangular cross-section design of the sealing rings 5 allows them to fit more tightly against the outer wall of the drain pipe 2, filling the tiny gaps between them at multiple angles. This tight fit not only significantly enhances the sealing effect but also effectively prevents moisture from seeping in from the contact surface, reducing the risk of leakage. At the same time, the triangular structure helps to disperse stress and reduce the risk of local stress concentration, thereby improving the stability of the connection between the rubber ring 1 and the drain pipe 2. In complex tunnel environments, this design can ensure the reliability of the sealing performance and maintain a good sealing effect even under long-term use or environmental changes, effectively improving the overall performance and durability of tunnel waterproofing.
[0032] The working principle of this utility model is as follows: When in use, the drain pipe 2 is fixedly installed on the inner surface of the rubber ring 1, and then the contact surface of the rubber ring 1 and the waterproof plate are tightly attached. By tearing open the adhesive seal 4, the adhesive 3 on the rubber ring 1 can be pasted with the waterproof plate for a better match. The adhesive 3 provides waterproofing. The other end of the rubber ring 1, due to the good extensibility of silicone, will tightly wrap around the outer wall of the other drain pipe 2, forming a self-sealed space.
[0033] 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 illustrative of the principles of this 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A self-adhesive saddle rubber gasket, comprising a rubber ring (1), characterized in that: The inner surface of the rubber ring (1) is fixedly connected to a drain pipe (2), and the outer surface of the rubber ring (1) is provided with adhesive backing (3). Two adhesive seals (4) are pasted on the outer surface of the adhesive backing (3).
2. The self-adhesive saddle rubber gasket according to claim 1, characterized in that: The outer surface of the rubber ring (1) is saddle-shaped.
3. The self-adhesive saddle rubber washer according to claim 1, characterized in that: The adhesive (3) is 3M adhesive.
4. The self-adhesive saddle rubber gasket according to claim 1, characterized in that: Both of the seals (4) are made of polyethylene.
5. The self-adhesive saddle rubber washer according to claim 1, characterized in that: The rubber ring (1) is made of methyl vinyl silicone rubber.
6. The self-adhesive saddle rubber washer according to claim 1, characterized in that: The inner surface of the rubber ring (1) is fixedly connected with several sealing rings (5), and the sealing rings (5) are all linearly and equally spaced.
7. The self-adhesive saddle rubber washer according to claim 6, characterized in that: The cross-section of several of the sealing rings (5) is triangular.