Expansion joint structure
By setting water-blocking and fire-blocking layers in the expansion joint nodes, combined with limiting parts and fire-resistant layers, the fireproofing and waterproofing problems of polystyrene foam plastics are solved, improving the overall performance of the expansion joint nodes and the durability of the building.
Patent Information
- Application Number
- CN202520210073.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-10
AI Technical Summary
In existing expansion joint structures, polystyrene foam has poor fire resistance and waterproof performance, and its adhesion to the expansion joint body is poor, which affects the waterproof, fireproof and durability of the building.
A water-blocking layer and a fire-blocking layer are installed in the expansion joint. The fire-blocking layer is composed of a tough fire-blocking strip. A limiting part and a fire-proof layer are installed between the polystyrene foam and the expansion joint body. Fire-blocking particles are used to enhance the fire-blocking effect, and an elastic limiting membrane is used for limiting and waterproofing.
It improves the fire resistance and waterproof performance of polystyrene foam, enhances its adhesion to the expansion joint body, extends its service life, and improves the waterproof and thermal insulation performance of buildings.
Smart Images
Figure CN223824376U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of expansion joint node technology, specifically an expansion joint node structure. Background Technology
[0002] Expansion joints are a common building structure used to accommodate the expansion and contraction of buildings caused by factors such as temperature changes and foundation settlement. In construction engineering, the design and construction of expansion joints are crucial, as the rationality of their joint structure directly affects the building's waterproofing, windproofing, sound insulation, and overall structural stability. A well-designed expansion joint structure can effectively prevent quality problems such as cracks and leaks caused by expansion and contraction during use, ensuring the building's normal use and durability. However, some expansion joint structures on the market currently use polystyrene foam, which requires manual injection. Traditional polystyrene foam has poor adhesion to the wall joists of the expansion joint, resulting in poor waterproofing, poor fire resistance, and insufficient durability. These problems can make the building more susceptible to changes in temperature and humidity, failing to meet user needs. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an expansion joint node structure to solve the problem of poor fire resistance and waterproof performance of polystyrene foam in expansion joint nodes, which affects the poor adhesion between polystyrene foam and the expansion joint body.
[0004] To achieve the above objectives, the present invention provides the following technical solution: an expansion joint node structure, comprising an expansion joint body, wherein the expansion joint body is filled with polystyrene foam, a water-blocking layer is provided at the upper end of the expansion joint body corresponding to the polystyrene foam, and a fire-resistant layer is provided at the lower end of the expansion joint body corresponding to the polystyrene foam.
[0005] As a further improvement of this utility model, the fire-resistant layer is a tough fire-resistant strip, and the sidewalls of the fire-resistant strip facing the expansion joint bodies on both sides are respectively connected to the corresponding expansion joint bodies on both sides.
[0006] As a further improvement of this utility model, a fire-resistant layer is formed between the fire-resistant strip and the polystyrene foam, and fire-resistant particles are disposed in the fire-resistant layer.
[0007] As a further improvement of this utility model, a limiting part is provided between the polystyrene foam and the expansion joint body.
[0008] As a further improvement of this utility model, the limiting part is a sink groove, which is horizontally and evenly distributed from top to bottom on the expansion joint body on both sides of the polystyrene foam plastic, corresponding to the position of the polystyrene foam plastic. The polystyrene foam plastic is partially filled in the sink groove, and a horizontal limiting protrusion is formed between two adjacent sink grooves.
[0009] As a further improvement of this utility model, elastic limiting membranes are provided on both the upper and lower sidewalls of the polystyrene foam.
[0010] Compared with the prior art, this utility model provides an expansion joint node structure with the following beneficial effects: The water-blocking layer at the upper end of the polystyrene foam in the expansion joint body effectively prevents water droplets from falling and affecting the adhesion and thermal insulation performance of the polystyrene foam to the wall. The fire-resistant layer at the lower end of the polystyrene foam effectively prevents flames from burning upwards and affecting the polystyrene foam. This allows the polystyrene foam to work in conjunction with the fire-resistant layer in the expansion joint node to achieve fire resistance, thereby improving the service life of the polystyrene foam and the thermal insulation and waterproofing performance of the exterior wall of the expansion joint node. Attached Figure Description
[0011] Figure 1 This is a cross-sectional view of the present invention;
[0012] Figure 2 This is a partial enlarged view of the limiting part of this utility model. Detailed Implementation
[0013] As shown in the figure, in order to achieve the above objectives, this utility model provides an expansion joint node structure, including an expansion joint body 1, in which polystyrene foam 2 is filled, a water-blocking layer 3 is provided at the upper end of the polystyrene foam 2, and a fire-resistant layer is provided at the lower end of the polystyrene foam 2.
[0014] This solution involves embedding polystyrene foam 2 within the expansion joint body 1. This foam board possesses both waterproof and thermal insulation properties. After those skilled in the art install the polystyrene foam 2 within the expansion joint, a water-blocking layer 3 is installed at its upper end, and a fire-resistant layer at its lower end. The water-blocking layer 3 mentioned in this solution can be a conventional waterproof expansion joint structure, typically composed of a stainless steel plate, a fixing base for connection to the wall joists, and a drainage channel for drainage. This solution places it at the upper end of the polystyrene foam 2 to effectively prevent water droplets from falling onto the surface of the polystyrene foam 2. To prevent the waterproofing and insulation effects of polystyrene foam 2 from being affected, and thus impacting the waterproofing and insulation of the building wall, this solution places a fire-resistant layer at the lower end of polystyrene foam 2. When the lower end of polystyrene foam 2 begins to burn, the fire-resistant layer can block the flames. The fire-resistant layer in this solution can be made of fire-resistant material to improve the fire-resistant effect, thereby improving the fire resistance of polystyrene foam 2, which has poor fire resistance, and making it less prone to damage. This solution can improve the waterproofing and fire-resistant performance of polystyrene foam 2 in the expansion joint body 1, and also extend the service life of the building itself.
[0015] The fire-resistant layer is a tough fire-resistant strip 4, and the sidewalls of the fire-resistant strip 4 facing the expansion joint body 1 on both sides are respectively connected to the corresponding expansion joint body 1 on both sides.
[0016] This solution uses a fire-resistant strip 4 as a fire-resistant layer. The fire-resistant strip 4 is made of fire-resistant cloth, but it can also be made of fire-resistant rubber, plastic, ceramic fiber, or other materials with strong fire-resistant properties. The fire-resistant strip 4 is connected to the side walls of the expansion joint body 1 on both sides. When the expansion joint expands or contracts, the fire-resistant strip 4 can also adapt to the expansion and contraction range of the expansion joint through deformation. The fire-resistant strip 4 has a certain degree of toughness, is not easy to break, and has good fire-resistant performance.
[0017] A fire-resistant layer 5 is formed between the fire-resistant strip 4 and the polystyrene foam 2, and fire-resistant particles 6 are disposed in the fire-resistant layer 5.
[0018] This solution involves setting a fire-resistant layer 5 between the fire-resistant strip 4 and the polystyrene foam 2. To prevent the fire-resistant strip 4 from failing to resist fire when subjected to a large fire, fire-resistant particles 6 made of fire-resistant material are used to enhance the fire-resistant effect of the fire-resistant strip 4, prevent the polystyrene foam 2 from being damaged by the fire, improve the service life of the polystyrene foam 2, and buy more time for rescue.
[0019] A limiting part is provided between the polystyrene foam 2 and the expansion joint body 1.
[0020] This design incorporates a limiting part that can limit the polystyrene foam 2 after it is installed between the expansion joint body 1, preventing the polystyrene foam 2 from dislodging from the expansion joint body 1 and causing displacement during expansion and contraction.
[0021] The limiting part is a sink 7. The sink 7 is evenly distributed horizontally from top to bottom on the expansion joint body 1 on both sides of the polystyrene foam 2, corresponding to the position of the polystyrene foam 2. The polystyrene foam 2 is partially filled in the sink 7, and a horizontal limiting protrusion 8 is formed between two adjacent sink 7.
[0022] This solution uses a recessed groove 7 as a limiting part. When the polystyrene foam 2 is injected and installed, the polystyrene foam 2 first fills the recessed groove 7. At this time, those skilled in the art continue to inject polystyrene foam 2 so that a complete polystyrene foam 2 is formed between the expansion joint body 1. The transverse limiting protrusions 8 formed between the recessed grooves 7 can longitudinally limit the polystyrene foam 2, prevent the polystyrene foam 2 from moving longitudinally and deviating from its position, and also make the adhesion between the polystyrene foam 2 and the expansion joint body 1 stronger.
[0023] The polystyrene foam 2 has elastic limiting membranes 9 on both its upper and lower sidewalls.
[0024] This solution employs an elastic limiting membrane 9, enabling those skilled in the art to limit the polystyrene foam 2 on both its upper and lower sides during installation. When the expansion joint closes, the polystyrene foam 2 deforms under pressure, and the elastic limiting membrane 9, with its elasticity, effectively limits its position. When the expansion joint opens, the elastic limiting membrane 9 also stretches and limits the polystyrene foam 2. Furthermore, the elastic limiting membrane 9 can block some water droplets, improving the waterproof performance of the polystyrene foam 2 and extending its service life.
[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. An expansion joint node structure, comprising an expansion joint body, wherein the expansion joint body is filled with polystyrene foam, characterized in that, A water-blocking layer is provided at the upper end of the polystyrene foam in the expansion joint body, and a fire-resistant layer is provided at the lower end of the polystyrene foam.
2. The expansion joint node structure according to claim 1, characterized in that, The fire-resistant layer is a tough fire-resistant strip, and the sidewalls of the fire-resistant strip facing the expansion joint bodies on both sides are respectively connected to the corresponding expansion joint bodies on both sides.
3. The expansion joint node structure according to claim 2, characterized in that, A fire-resistant layer is formed between the fire-resistant strip and the polystyrene foam, and fire-resistant particles are disposed in the fire-resistant layer.
4. The expansion joint node structure according to claim 1, characterized in that, A limiting part is provided between the polystyrene foam and the expansion joint body.
5. The expansion joint node structure according to claim 4, characterized in that, The limiting part is a sink groove, which is horizontally and evenly distributed on the expansion joint body on both sides of the polystyrene foam plastic from top to bottom, corresponding to the position of the polystyrene foam plastic. The polystyrene foam plastic is partially filled in the sink groove, and a horizontal limiting protrusion is formed between two adjacent sink grooves.
6. The expansion joint node structure according to claim 1, 2, 3, 4, or 5, characterized in that, The polystyrene foam has elastic limiting membranes on both its upper and lower sidewalls.