Water stop strip

Abstract

The utility model discloses a water stop strip, and belongs to the technical field of water stop strips. The water stop strip comprises an inner core and a main body wrapping the inner core, the main body comprises a self-adaptive expansion layer, a wear-resistant layer and a bonding layer from inside to outside, and the self-adaptive expansion layer comprises a slow expansion layer close to the inner core and a rapid expansion layer close to the wear-resistant layer. After the scheme is adopted, precise and efficient self-adaptive water stopping can be achieved, the rapid expansion layer can rapidly fill large gaps to achieve instant water prevention, and the slow expansion layer continuously maintains water stopping pressure to ensure the long-term effect; the wear-resistant layer resists external force to protect the internal structure; the bonding performance is reliable, and the bonding layer is firmly bonded with surrounding building materials; the waterproof structure is widely applicable to various building waterproof projects and provides reliable waterproof guarantee for the projects.

Description

Technical Field

[0001] This utility model relates to the field of waterstop strip technology, specifically a waterstop strip. Background Technology

[0002] In the field of building waterproofing engineering, waterstop strips are key materials for preventing water leakage and are widely used in many projects such as basements, tunnels, and water conservancy facilities. Among them, the expansion performance of waterstop strips is crucial for achieving efficient waterproofing.

[0003] Currently, traditional waterstop strips have significant shortcomings in terms of expansion performance. Most traditional waterstop strips only have a single expansion rate and cannot adaptively adjust the expansion speed according to actual working conditions. In actual engineering projects, water leakage situations are complex and varied. For example, in some sudden large-scale seepage scenarios, such as a rapid rise in groundwater levels after heavy rain, traditional waterstop strips, due to their slow expansion speed, cannot effectively fill gaps in a timely manner, leading to rapid leakage of large amounts of water and seriously affecting the waterproofing effect of the project.

[0004] Conversely, in projects where water seepage occurs slowly over a long period, traditional waterstops, while initially expanding rapidly, lack sustained expansion force. As time passes, they become unable to cope with new gaps created by minor structural deformations, increasing the risk of leakage. This characteristic of a single expansion rate makes it difficult for traditional waterstops to maintain effective sealing across different seepage stages and complex environments.

[0005] This invention aims to overcome the limitations of traditional waterstop strips in terms of expansion performance. Through innovative design, a waterstop strip with an adaptive expansion layer is proposed. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides a waterstop strip.

[0007] The technical solution adopted by this utility model is: a waterstop strip, including an inner core and a main body wrapped around the inner core. The main body includes an adaptive expansion layer, a wear-resistant layer wrapped around the adaptive expansion layer, and an adhesive layer wrapped around the wear-resistant layer. The adaptive expansion layer includes at least a slow expansion layer near the inner core and a fast expansion layer near the wear-resistant layer.

[0008] Furthermore, the inner core has a hollow structure or a honeycomb structure.

[0009] Furthermore, the inner core is provided with self-healing capsules spaced apart, and the self-healing capsules are filled with a water-stop strip repair fluid.

[0010] Furthermore, the outer wall of the inner core is provided with several protruding strips at intervals.

[0011] Furthermore, a number of raised strips are provided at intervals on the outer wall of the main body.

[0012] Furthermore, the rapid expansion layer is a blend of highly absorbent resins or a modified starch-acrylic acid graft copolymer.

[0013] Furthermore, the slowly expanding layer is a cross-linked polyacrylamide gel or a bentonite-rubber composite material.

[0014] Furthermore, the thickness of the slow-expansion layer is 3-8 mm, and the thickness of the rapid-expansion layer is 5-10 mm.

[0015] Furthermore, a protective film is provided on the surface of the adhesive layer.

[0016] The beneficial effects of this utility model are:

[0017] 1. Precise and Efficient Adaptive Waterstopping: This waterstop strip innovatively incorporates an adaptive expansion layer comprising a slow-expansion layer and a fast-expansion layer. The fast-expansion layer, located near the wear-resistant layer, reacts rapidly upon contact with water. Its rapid water absorption and expansion quickly fills large gaps, effectively preventing rapid water penetration and providing immediate waterproofing protection. Meanwhile, the slow-expansion layer, closer to the core, plays a subsequent role, expanding slowly and continuously to maintain waterstop pressure over a longer period, compensating for minor gaps caused by structural deformation or other factors, ensuring long-term stable waterstopping performance. This dual-expansion-layer design allows the waterstop strip to adaptively adjust its expansion speed and degree according to actual seepage conditions, significantly improving the precision and effectiveness of waterstopping. Compared to traditional waterstop strips with a single expansion rate, it better handles complex and variable seepage situations.

[0018] 2. Enhanced Durability and Stability: The wear-resistant layer, encasing the self-adaptive expansion layer, acts like a robust armor, significantly improving the durability of the waterstop strip. In practical engineering applications, waterstop strips may be subjected to various external forces, such as friction during construction, erosion from water flow, and scratches from surrounding objects. The wear-resistant layer, made of high-strength, wear-resistant materials, effectively resists these external forces, protecting the internal self-adaptive expansion layer from damage and ensuring its stable expansion performance. This extends the service life of the waterstop strip and reduces the risk of leakage and maintenance costs caused by waterstop strip damage.

[0019] 3. Reliable Adhesion Performance: The outermost adhesive layer firmly bonds to surrounding building materials such as concrete and brick. This feature effectively solves the problem of poor adhesion between traditional waterstops and structures, preventing water leakage at the interface between the waterstop and the structure due to adhesion failure. During construction, simply remove the protective film on the adhesive layer surface to easily attach the waterstop to the construction site, ensuring ease of construction and the firmness of the waterstop installation, further enhancing the reliability of the overall waterproofing system.

[0020] 4. Enhanced Overall Performance and Wide Applicability: Through the synergistic effect of the inner core, self-adaptive expansion layer, wear-resistant layer, and adhesive layer, the overall performance of this waterstop strip is comprehensively improved. It not only achieves efficient water sealing under various environmental conditions but also meets the needs of various building waterproofing projects. Whether in underground engineering, water conservancy facilities, tunnels, bridges, or other projects, this waterstop strip, with its superior performance, provides reliable waterproofing protection, possessing broad application prospects and promotional value.

[0021] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0024] Figure 1-2 In the middle: 1. Inner core; 2. Main body; 3. Adaptive expansion layer; 4. Wear-resistant layer; 5. Adhesive layer; 6. Slow expansion layer; 7. Fast expansion layer; 8. Self-healing capsule; 9. Water-stop strip repair liquid; 10. Raised strip one; 11. Raised strip two; 12. Protective film. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0027] This utility model provides a water-stop strip.

[0028] In this embodiment, refer to Figure 1-2The waterstop strip includes an inner core 1 and a main body 2 wrapped around the inner core 1. The main body 2 includes an adaptive expansion layer 3, a wear-resistant layer 4 wrapped around the adaptive expansion layer, and an adhesive layer 5 wrapped around the wear-resistant layer 4. The adaptive expansion layer 4 includes at least a slow expansion layer 6 near the inner core and a fast expansion layer 7 near the wear-resistant layer.

[0029] In the above technical solution, by setting an inner core and a main body wrapped around the inner core, and simultaneously setting a wear-resistant layer, an adaptive expansion layer, and an adhesive layer, the adaptive expansion layer can achieve a combination of rapid and long-term water-stopping according to different seepage conditions; the wear-resistant layer can protect the internal structure from external physical damage, such as construction friction and water erosion, extending the service life of the waterstop strip; the adhesive layer facilitates the firm bonding of the waterstop strip to building materials such as concrete, preventing leakage caused by poor bonding. The synergistic effect of each layer significantly improves the overall water-stopping performance of the waterstop strip.

[0030] Additionally, it should be noted that both slow-expansion layers and fast-expansion layers are conventional expansion layers, differing only in the amount of expansion material used. "Slow" and "fast" refer only to the ratio of their quantities.

[0031] Specifically, the inner core has a hollow structure or a honeycomb structure.

[0032] In this embodiment, the inner core adopts a hollow or honeycomb structure. On the one hand, this reduces the overall weight of the waterstop strip, facilitating construction and installation; on the other hand, these structures increase the surface area of ​​the inner core, which helps to more effectively transfer stress during expansion, making the expansion of the adaptive expansion layer more uniform, thereby optimizing the water-stopping effect. At the same time, the hollow or honeycomb structure can also store moisture to a certain extent, providing a water source for the continuous expansion of the adaptive expansion layer and enhancing the long-term water-stopping capability of the waterstop strip.

[0033] Specifically, the inner core has self-healing capsules 8 spaced apart, and the self-healing capsules 8 are filled with water-stop strip repair liquid 9.

[0034] In this embodiment, the self-healing capsules spaced apart within the core endow the waterstop strip with a self-healing function. When the waterstop strip cracks due to external force, the self-healing capsules rupture, releasing the waterstop repair fluid inside, automatically repairing the crack and restoring the integrity and water-stopping performance of the waterstop strip. This not only improves the reliability of the waterstop strip but also extends its service life and reduces the risk of leakage and maintenance costs caused by cracks.

[0035] Specifically, the outer wall of the inner core is provided with a plurality of protrusions 10 at intervals.

[0036] In this embodiment, several protruding strips spaced apart on the outer wall of the inner core increase the contact area and friction between the inner core and the adaptive expansion layer, making the two more tightly bonded. This prevents relative displacement between the inner core and the adaptive expansion layer during expansion, ensuring the stability of the waterstop strip structure and thus improving the waterstop effect. Furthermore, the protruding strips also act as "reinforcing ribs," enhancing the inner core's support for the adaptive expansion layer, allowing it to better maintain its shape during expansion and improving the overall performance of the waterstop strip.

[0037] Specifically, the outer wall of the main body is provided with a number of protruding strips 11 at intervals.

[0038] In this embodiment, several raised strips are spaced apart on the outer wall of the inner core and outer main body, increasing the contact area and interlocking force between the waterstop strip and the surrounding building materials. When bonded with materials such as concrete, the raised strips can be embedded therein, further improving the bonding strength between the waterstop strip and the structure, effectively preventing water leakage along the interface between the waterstop strip and the structure, and enhancing the waterproof sealing performance of the waterstop strip.

[0039] Specifically, the rapid expansion layer is a blend of highly absorbent resin or a modified starch-acrylic acid graft copolymer.

[0040] In this embodiment, the rapid expansion layer is made of a highly absorbent resin blend or a modified starch-acrylic acid graft copolymer, both of which have the characteristic of rapid water absorption and expansion. When exposed to water, they can quickly absorb a large amount of moisture and expand rapidly, filling large gaps in a short time and effectively preventing rapid water penetration. This provides the waterstop strip with the ability to quickly stop water leakage, meeting the emergency water-stopping needs of the project in the event of sudden water seepage.

[0041] Specifically, the slowly expanding layer is a cross-linked polyacrylamide gel or a bentonite-rubber composite material.

[0042] In this embodiment, the slow-expansion layer uses cross-linked polyacrylamide gel or bentonite-rubber composite material, which have slow and durable expansion properties. After the rapid expansion layer takes effect, the slow-expansion layer continues to expand slowly, maintaining the water-stopping pressure for a long time, compensating for tiny gaps caused by structural deformation or other factors, ensuring the long-term stable water-stopping effect of the waterstop strip, and effectively addressing the needs of slow seepage and long-term waterproofing in engineering projects.

[0043] Specifically, the thickness of the slow expansion layer is 3-8 mm, and the thickness of the rapid expansion layer is 5-10 mm.

[0044] In this embodiment, the slow-expansion layer and the fast-expansion layer employ appropriate curvatures to ensure that the fast-expansion layer can quickly respond to seepage and achieve rapid water stoppage; while the slow-expansion layer can provide continuous expansion force subsequently, maintaining long-term water stoppage. The two work together to optimize the adaptive expansion performance of the waterstop strip, improving its water-stopping efficiency and effectiveness under different stages and seepage conditions.

[0045] Specifically, a protective film 12 is provided on the surface of the adhesive layer.

[0046] In this embodiment, a protective film is applied to the surface of the adhesive layer. During storage and transportation of the waterstop strip, the adhesive layer is protected from contamination and damage, maintaining its adhesive performance. During construction, the protective film is simply removed, allowing the waterstop strip to be easily adhered to the construction site. This ensures the cleanliness of the adhesive layer, improves construction convenience and the accuracy of waterstop strip installation, and guarantees reliable adhesion between the waterstop strip and building materials, enhancing the waterproofing effect.

[0047] The production process of this utility model:

[0048] Inner Core and Adaptive Expansion Layer: If the inner core has a hollow or honeycomb structure, it is manufactured using injection molding. After the inner core is fabricated, the adaptive expansion layer material is extruded over it. During extrusion, temperature and speed are strictly controlled to ensure a tight bond between the adaptive expansion layer and the inner core. For example, spaced protrusions on the outside of the inner core increase the contact area and enhance the bonding force between the two.

[0049] Adaptive Expansion Layer and Wear-Resistant Layer: After the adaptive expansion layer is fully coated and initially cured, a secondary extrusion process is used to extrude the wear-resistant layer material and wrap it around the adaptive expansion layer. Simultaneously, a mold is used to create a certain frictional force between the wear-resistant layer and the adaptive expansion layer, ensuring a strong bond.

[0050] Wear-resistant layer and adhesive layer: On the outside of the wear-resistant layer, the adhesive layer material is uniformly coated using a coating process. After coating, a protective film is applied.

[0051] Material selection:

[0052] Wear-resistant layer: Polyetheretherketone (PEEK) can be used, which has high strength and wear resistance, and can resist external scratches and water erosion. It has good high temperature resistance and chemical stability, can adapt to a variety of complex environments, and ensures the long-term stable operation of the waterstop strip.

[0053] Adhesive layer: such as modified butyl rubber, which has strong adhesion to building materials such as concrete and brick, can ensure that the waterstop strip is tightly bonded to the structure and prevent leakage.

[0054] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A waterstop strip, characterized in that... include: It includes an inner core and a body wrapped around the inner core. The body includes an adaptive expansion layer, a wear-resistant layer wrapped around the adaptive expansion layer, and an adhesive layer wrapped around the wear-resistant layer. The adaptive expansion layer includes at least a slow expansion layer near the inner core and a fast expansion layer near the wear-resistant layer.

2. The waterstop strip according to claim 1, characterized in that: The inner core has a hollow structure or a honeycomb structure.

3. The waterstop strip according to claim 1, characterized in that: The inner core contains self-healing capsules spaced apart, and the self-healing capsules are filled with a water-stop strip repair fluid.

4. The waterstop strip according to claim 1, characterized in that: The outer wall of the inner core is provided with several protruding strips at intervals.

5. The waterstop strip according to claim 1, characterized in that: The outer wall of the main body is provided with several protruding strips at intervals.

6. The waterstop strip according to claim 1, characterized in that: The rapid expansion layer is a blend of highly absorbent resin or a modified starch-acrylic acid graft copolymer.

7. The waterstop strip according to claim 1, characterized in that: The slow-expanding layer is a cross-linked polyacrylamide gel or a bentonite-rubber composite material.

8. The waterstop strip according to claim 1, characterized in that: The thickness of the slow-expansion layer is 3-8 mm, and the thickness of the rapid-expansion layer is 5-10 mm.

9. The waterstop strip according to claim 1, characterized in that: The adhesive layer has a protective film on its surface.

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