A type of segment sealing strip

Abstract

This application discloses a segment sealing strip, relating to the field of tunnel engineering technology. The strip includes a main body and, through a multi-structure collaborative design, achieves a comprehensive improvement in waterproof performance and engineering applicability. The wavy EPDM rubber layer, with its undulating curved surface structure, constructs multiple three-dimensional water-blocking barriers, significantly enhancing waterproofing efficiency. The water-swellable rubber layer expands rapidly upon contact with water, filling tiny gaps and forming dynamic waterproof reinforcement. The internal pore design gives the strip excellent elastic deformation capability, adaptively adjusting its shape during segment compression and displacement to ensure the continuity and stability of the seal. The metal support skeleton enhances the overall rigidity of the strip, effectively resisting external impacts and deformation, maintaining the integrity of the sealing structure. The bottom protrusion, combined with anti-slip texture, achieves precise fitting and firm fixation with the segment groove, preventing misalignment during installation and curing, and ensuring long-term stable operation of the sealing system.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering technology, and in particular to a segment sealing strip. Background Technology

[0002] Segment construction is a type of precast concrete component used in tunnel engineering when using the shield tunneling method to assemble and form the tunnel lining structure. It is one of the core components of shield tunneling. It is usually in the form of ring-shaped plates and can be divided into standard blocks, adjacent blocks, and capping blocks according to the number of blocks. Bolt holes are set between the blocks and they are connected to form a ring with bolts. The joints are designed with waterproof sealing.

[0003] Traditional segment sealing strips are prone to edge leakage under high water pressure due to uneven distribution of contact stress. Traditional sealing strips that are glued with adhesives require 24 hours to cure, and during the curing process, they may shift due to gravity. Utility Model Content

[0004] The purpose of this invention is to provide a sealing strip for pipe segments to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a segment sealing strip, comprising a box body, a corrugated EPDM rubber layer at the top of the body, a water-swellable rubber layer on the inner side of the corrugated EPDM rubber layer, a hole below the water-swellable rubber layer, and a metal bracket fixedly connected to the inner side of the body. A boss is provided at the bottom of the body.

[0006] Preferably, the water-swellable rubber layer is continuously arranged along the wavy EPDM rubber layer, and the water-swellable rubber layer can increase pressure when exposed to water.

[0007] Preferably, the holes are arranged in an elliptical array within the main body, with the long axis aligned with the compression direction of the sealing strip, and the holes are filled with elastic foam material.

[0008] Preferably, the metal bracket is woven from stainless steel wire, and the surface of the metal bracket is bonded to the main body through a vulcanization process.

[0009] The two sides of the boss are provided with anti-slip texture, which is a serrated groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This sealing strip achieves a comprehensive improvement in waterproof performance and engineering applicability through a multi-structure collaborative design. The wavy EPDM rubber layer, with its undulating curved surface structure, constructs multiple three-dimensional water-blocking barriers, significantly enhancing waterproofing efficiency. The water-swellable rubber layer expands rapidly upon contact with water, filling tiny gaps and forming dynamic waterproof reinforcement. The internal pore design gives the strip excellent elastic deformation capability, adaptively adjusting its shape when the segment is compressed or displaced, ensuring the continuity and stability of the seal. The metal support skeleton enhances the overall rigidity of the strip, effectively resisting external impacts and deformation, maintaining the integrity of the sealing structure. The bottom protrusion with anti-slip texture achieves precise fitting and firm fixation with the segment groove, preventing misalignment during installation and curing, and ensuring the long-term stable operation of the sealing system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall front structure proposed in this utility model;

[0013] Figure 2 This is a schematic diagram of the main structure proposed in this utility model;

[0014] In the diagram: 1. Main body; 2. Wavy EPDM rubber layer; 3. Water-swellable rubber layer; 4. Holes; 5. Metal support; 6. Boss. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-2 As shown, a segment sealing strip includes a main body 1. A corrugated EPDM rubber layer 2 is provided at the top of the main body 1. A water-swellable rubber layer 3 is provided on the inner side of the corrugated EPDM rubber layer 2. A hole 4 is provided below the water-swellable rubber layer 3. A metal bracket 5 is fixedly connected to the inner side of the main body 1. A boss 6 is provided at the bottom of the main body 1. The corrugated EPDM rubber layer 2 can better prevent leakage multiple times. The water-swellable rubber layer 3 can increase the pressure on the segment sealing strip when exposed to water, thereby improving the waterproof effect. The hole 4 allows the sealing strip to produce greater elastic deformation when compressed. The metal bracket 5 improves the stability of the sealing strip. The boss 6 facilitates the installation of the strip.

[0017] Furthermore, the water-swellable rubber layer 3 is continuously arranged along the wavy EPDM rubber layer 2. The water-swellable rubber layer 3 can increase pressure when exposed to water, thereby improving the self-adaptive force of the rubber strip and thus improving the waterproofing efficiency.

[0018] Furthermore, the holes 4 are arranged in an elliptical array within the main body 1, with the long axis aligned with the compression direction of the sealing strip. The holes 4 are filled with elastic foam material. The arrangement of the holes 4 allows for better adaptation to changes in the joints between the segments.

[0019] Furthermore, the metal bracket 5 is woven from stainless steel wire, and the surface of the metal bracket 5 is bonded to the main body 1 through a vulcanization process. This design can further improve the sealing strip's high elasticity and aging resistance.

[0020] Furthermore, the two sides of the boss 6 are provided with anti-slip texture, which is a serrated groove. This design can provide a certain support when installing the adhesive strip and facilitate the curing of the adhesive during installation, thereby preventing misalignment.

[0021] Working Principle: During the construction and installation phase, the segment sealing groove is first thoroughly cleaned to ensure no impurities or oil residue remain. Then, a high-performance adhesive is applied evenly. When the sealing strip is embedded into the sealing groove, the precise positioning of the protrusions 6 and the mechanical interlocking of the serrated anti-slip texture on both sides ensure zero-offset installation between the main body 1 and the segment. After 24 hours of complete adhesive curing, a stable initial sealing structure is formed. When the tunnel encounters external water pressure, the corrugated EPDM rubber layer 2, with its multi-layered curved structure, effectively extends the seepage path and reduces the risk of leakage. The internal pores 4 buffer pressure through elastic deformation, ensuring the sealing strip remains tightly adhered under high water pressure. If a small amount of water seepage occurs, the water-swellable rubber layer 3 rapidly expands, further enhancing the sealing effect by compressing the corrugated EPDM rubber layer 2, while simultaneously filling tiny gaps to create a second waterproof barrier. At the same time, the metal support 5 enhances the overall toughness and structural strength of the rubber strip, resisting deformation and tearing caused by external forces. The synergistic effect of multiple structures ultimately achieves efficient and durable waterproof performance, thus completing the installation process of a pipe segment sealing rubber strip.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A segment sealing strip, comprising a main body (1), characterized in that, The top of the main body (1) is provided with a wavy EPDM rubber layer (2), the inner side of the wavy EPDM rubber layer (2) is provided with a water-swellable rubber layer (3), the bottom of the water-swellable rubber layer (3) is provided with a hole (4), the inner side of the main body (1) is fixedly connected with a metal bracket (5), and the bottom of the main body (1) is provided with a boss (6).

2. The segment sealing strip according to claim 1, characterized in that, The water-swellable rubber layer (3) is continuously arranged along the wavy EPDM rubber layer (2), and the water-swellable rubber layer (3) can increase pressure when exposed to water.

3. The segment sealing strip according to claim 1, characterized in that, The holes (4) are arranged in an elliptical array within the main body (1), with the long axis direction aligned with the compression direction of the sealing strip. The holes (4) are filled with elastic foam material.

4. The segment sealing strip according to claim 1, characterized in that, The metal bracket (5) is woven from stainless steel wire, and the surface of the metal bracket (5) is bonded to the main body (1) through a vulcanization process.

5. A segment sealing strip according to claim 1, characterized in that, The two sides of the boss (6) are provided with anti-slip texture, which is a serrated groove.

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