A new type of rubber waterstop

Abstract

This utility model provides a novel rubber waterstop, belonging to the technical field of waterstops. It includes rubber and a composite skeleton. The composite skeleton includes a reinforcing mesh in the middle and polymer coating layers on both sides of the reinforcing mesh. The vulcanized bonding area between the composite skeleton and the rubber is provided with protrusions that fit into the rubber, multiple through holes penetrating the composite skeleton, and stress-dispersing units. The through holes are evenly distributed in the vulcanized bonding area, and the stress-dispersing units are located at the edges of the vulcanized bonding area. The technical solution provided by this utility model can significantly improve the corrosion resistance of the composite skeleton, strengthen the anti-detachment ability between the composite skeleton and the rubber, and extend the overall service life of the waterstop, making it suitable for widespread application in expansion joints of building engineering.

Description

Technical Field

[0001] This utility model belongs to the field of waterstop technology, and in particular relates to a novel rubber waterstop. Background Technology

[0002] Expansion joint steel-edged waterstop is a waterproofing material specifically designed for expansion joints (such as expansion joints and settlement joints) in concrete structures of building engineering. It is composed of a rubber body and galvanized steel strips on both sides, bonded together through a hot vulcanization process. Its core function is to maintain a tight fit during the thermal expansion and contraction of concrete through the elastic deformation of the rubber and the fixing effect of the steel strips, effectively preventing moisture penetration.

[0003] Traditional waterstops using a composite method of galvanized steel sheet and rubber have certain problems that affect their long-term service life. For example, galvanized steel sheet has weak corrosion resistance and is prone to corrosion in acidic soils and areas with high water content, which significantly reduces its service life. In addition, the expansion coefficients of galvanized steel sheet and rubber line are quite different. When used in environments with large temperature differences for a long time, it will cause large temperature stress, which can easily lead to the debonding of rubber from the skeleton. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of rubber waterstop to solve the technical problems of poor corrosion resistance, easy detachment of rubber from the skeleton, and short service life in the prior art.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A novel rubber waterstop includes rubber and a composite skeleton, wherein the composite skeleton includes a reinforcing mesh disposed in the middle and polymer coating layers disposed on both sides of the reinforcing mesh. The composite skeleton and the vulcanized bonding area of ​​the rubber are respectively provided with protrusions that fit into the rubber, multiple through holes penetrating the composite skeleton, and stress dispersion units. The through holes are evenly distributed in the vulcanized bonding area, and the stress dispersion units are located at the edge of the vulcanized bonding area.

[0006] The protrusions are wavy, dovetail-shaped, rectangular, or rectangular in different directions arranged in an alternating manner.

[0007] The stress dispersion unit is a rounded corner located at the edge of the composite skeleton.

[0008] The composite skeleton has a thickness of 1-4 mm, and the through hole is a round hole with a diameter of 2-5 mm.

[0009] The minimum spacing between the through holes is greater than 10 mm.

[0010] The reinforcing mesh is a high-strength fiber mesh or a high-strength fiber grid, and the polymer coating layer is one or more corrosion-resistant polymer materials.

[0011] The beneficial effects of this utility model are as follows: By providing a novel rubber waterstop, the composite skeleton is coated with a corrosion-resistant polymer and reinforced with high-strength fibers, making the expansion coefficients of the composite skeleton and rubber similar. This greatly reduces the interfacial temperature stress caused by temperature differences, thus fundamentally preventing the debonding problem between the skeleton and the rubber. In addition, the design of the polymer coating and the reinforcing mesh can improve the overall corrosion resistance of the composite skeleton, eliminating the technical defects of traditional galvanized steel plates, such as weak corrosion resistance and short service life. Furthermore, the polymer coating material can be flexibly selected according to different engineering requirements (acid resistance, alkali resistance, high strength, etc.), which can effectively improve the environmental adaptability of the product.

[0012] By utilizing the interlocking of protrusions and rubber, the rubber and composite skeleton form a primary interlock. The through holes in the composite skeleton, after vulcanization with the rubber, form a secondary interlock with a three-dimensional interlock. This effectively improves the overall tensile and shear resistance of the waterstop, ensuring the structural integrity of the waterstop during long-term application in dynamic expansion joints.

[0013] By setting protrusions on the composite skeleton that fit into the rubber, the vulcanization contact area between the rubber and the composite skeleton can be effectively increased, thereby improving the bonding strength after vulcanization.

[0014] The design of the stress dispersion unit utilizes rounded corners to smoothly transition interface stress, which can significantly reduce the stress concentration coefficient of the end of the composite skeleton, a traditional high-stress area. This effectively prevents the waterstop from generating and expanding cracks during thermal expansion and contraction, and greatly improves the fatigue resistance and service life of the waterstop under repeated deformation.

[0015] The technical solution provided by this utility model can significantly improve the corrosion resistance of the composite skeleton, reduce the coefficient of linear expansion between it and rubber, strengthen the anti-debonding ability between it and rubber, and extend the overall service life of the waterstop. It is suitable for widespread application in expansion joints of building engineering. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the main structure of the composite skeleton of this utility model; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0017] The markings in the diagram are as follows: 1. Rubber, 2. Composite skeleton, 3. Reinforcing mesh, 4. Polymer coating layer, 5. Vulcanized bonding area, 6. Protrusion, 7. Through hole, 8. Rounded corner. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model is provided below with reference to the accompanying drawings.

[0019] like Figures 1 to 3 As shown, this utility model provides a novel rubber waterstop, comprising rubber 1 and a composite skeleton 2, which are bonded together by vulcanization to form the novel rubber waterstop as a whole. Unlike existing technologies, the composite skeleton 2 in this embodiment includes a reinforcing mesh 3 located in the middle and polymer coating layers 4 disposed on both sides of the reinforcing mesh 3. The reinforcing mesh 3 is a high-strength fiber mesh or high-strength fiber grid, and the polymer coating layer 4 is a corrosion-resistant polymer material, namely one or more of PET polyester, PA polyamide, PP polypropylene, and GFRP glass fiber reinforced polymer. The selection and proportion of materials can be determined according to the acid and alkali resistance and strength requirements of the rubber 1 waterstop, which will not be elaborated in this embodiment.

[0020] Specifically, such as Figure 2 , Figure 3 As shown, the vulcanized bonding area 5 of the composite skeleton 2 and the rubber 1 is respectively provided with protrusions 6 that fit into the rubber 1, multiple through holes 7 penetrating the composite skeleton 2, and stress dispersion units. The protrusions 6 can be wavy, arc-shaped, dovetail-shaped, rectangular, or rectangular shapes arranged in different directions. In this embodiment, the protrusions 6 are preferably arc-shaped. The arc-shaped protrusions 6 are arranged horizontally and extend along the span direction of the rubber 1.

[0021] Multiple through holes 7 are evenly distributed in the vulcanized bonding area 5. Preferably, they are distributed on the plane between two adjacent arc-shaped protrusions 6 in the vulcanized bonding area 5. The number of through holes 7 between two adjacent arc-shaped protrusions 6 is two or more, and in this embodiment, it is three. In order to disperse the interface stress at the end of the composite skeleton 2 and avoid the formation of micro-cracks in the composite skeleton 2 and rubber 1 after bonding, in this embodiment, stress dispersion units are provided at the edge of the vulcanized bonding area 5. Preferably, the edge of the vulcanized bonding area 5 is rounded 8.

[0022] Furthermore, the thickness of the traditional composite skeleton 2 ranges from 1 to 4 mm, typically 3 mm. In this embodiment, to ensure that the mechanical strength of the composite skeleton 2 is not excessively weakened, and to allow the composite skeleton 2 and rubber 1 to form a three-dimensional fit, the through holes 7 are circular holes with a diameter of 2-5 mm, preferably 3 mm. The minimum spacing between the through holes 7 is greater than 10 mm, preferably 20 mm. This design can prevent the composite skeleton 2 from losing the continuity of longitudinal stiffness and strength due to excessive hole spacing, and can also utilize the rheological behavior of rubber 1 under the high temperature and high pressure environment of the vulcanization process to allow rubber 1 to fully fill the through holes 7 to form a firm "rivet," which can further effectively prevent rubber 1 from debonding from the composite skeleton 2.

[0023] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A novel rubber waterstop, characterized in that: It includes rubber (1) and a composite skeleton (2), the composite skeleton (2) including a reinforcing mesh (3) disposed in the middle and polymer coating layers (4) disposed on both sides of the reinforcing mesh (3). The composite skeleton (2) and the vulcanized bonding area (5) of the rubber (1) are respectively provided with protrusions (6) that fit into the rubber (1), multiple through holes (7) penetrating the composite skeleton (2), and stress dispersion units. The through holes (7) are evenly distributed in the vulcanized bonding area (5), and the stress dispersion units are provided at the edge of the vulcanized bonding area (5).

2. The novel rubber waterstop according to claim 1, characterized in that: The protrusion (6) is wavy, dovetail-shaped, rectangular, or rectangular in different directions arranged in an alternating manner.

3. The novel rubber waterstop according to claim 1, characterized in that: The stress dispersion unit is a rounded corner (8) located at the edge of the composite skeleton (2).

4. The novel rubber waterstop according to claim 1, characterized in that: The thickness of the composite skeleton (2) is 1-4 mm, the through hole (7) is a round hole, and the diameter of the through hole (7) is 2-5 mm.

5. A novel rubber waterstop according to claim 1, characterized in that: The minimum spacing between the through holes (7) is greater than 10 mm.

6. The novel rubber waterstop according to claim 1, characterized in that: The reinforcing mesh (3) is a high-strength fiber mesh or a high-strength fiber grid, and the polymer coating layer (4) is one or more corrosion-resistant polymer materials.

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