PVC (polyvinyl chloride) trapezoidal roof dividing strip
By designing PVC trapezoidal roof partition strips, the problems of insufficient stress dispersion and deformation adaptability of traditional roof partition joint materials are solved, achieving uniform coating of waterproof coating and improving construction efficiency, thus meeting the construction needs of modern industrial plants.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR EIGHTH BUREAU SOUTH CHINA CONSTR CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-05
AI Technical Summary
In existing roof expansion joint construction processes, traditional expansion joint materials are ineffective in dispersing stress and resisting deformation, making it difficult to adapt to the deformation requirements of steel structure roofs; the pouring of waterproof coating inside the expansion joints is not reasonable enough, and it is impossible to accurately and evenly coat every part of the cracks; the low degree of material prefabrication during construction results in low construction efficiency and high costs, making it difficult to meet the needs of modern industrial plant construction.
The PVC trapezoidal roof divider is designed as an inverted trapezoid, wider at the top and narrower at the bottom, with an internal cavity and liquid outlet. It is equipped with a rubber pad and a waterproof cover. The trapezoidal cross section disperses stress and improves the material's deformation capacity. The waterproof coating is evenly distributed through the liquid outlet, and the rubber pad absorbs the pressure. The waterproof cover prevents rainwater from affecting the roof.
It effectively disperses stress caused by temperature changes and material expansion, improves construction efficiency, reduces costs, ensures the stability and waterproofing effect of the roof structure, achieves uniform application of waterproof coating, and improves construction quality.
Smart Images

Figure CN224200159U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of roofing engineering technology, specifically a PVC trapezoidal roofing divider. Background Technology
[0002] In the construction of steel-structured clean industrial plants, the roof area is significantly larger than that of conventional buildings such as residential buildings, resulting in a massive volume of rigid concrete waterproof protective layer to be poured in a single operation. Furthermore, steel structures are susceptible to slight deformations due to external temperature changes, making it extremely difficult to control cracking in the roof waterproof protective layer. As the weight of roof construction projects in various awards and competitions continues to increase, the construction quality of roof expansion joints in large-span roofs is receiving increasing attention. Roof expansion joints, as artificial gaps set in the roof leveling layer and rigid protective layer, are a key measure to prevent irregular cracking of the roof by reducing the unit area and mitigating expansion, contraction, and warping.
[0003] However, existing roof expansion joint construction techniques have many shortcomings. Traditional expansion joint materials are ineffective in dispersing stress and resisting deformation, making it difficult to adapt to the deformation requirements of steel structure roofs; the application of waterproof coating inside the expansion joints is not reasonable, and the waterproof coating cannot be accurately and evenly applied to every part of the crack; moreover, the degree of material prefabrication during construction is low, resulting in low construction efficiency and high costs, which is difficult to meet the needs of modern industrial plant construction. To address these issues, this utility model provides a PVC trapezoidal roof expansion strip to solve the aforementioned problems. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a PVC trapezoidal roof partition strip, solving many deficiencies in current roof partition joint construction processes. Traditional partition joint materials are ineffective in dispersing stress and resisting deformation, making it difficult to adapt to the deformation requirements of steel structure roofs; the application of waterproof coating inside the partition joint is not reasonable, and the waterproof coating cannot be accurately and evenly applied to every part of the crack; furthermore, the low degree of material prefabrication during construction results in low construction efficiency and high costs, making it difficult to meet the needs of modern industrial plant construction.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a PVC trapezoidal roof divider, comprising a roof divider assembly, wherein the roof divider assembly comprises a divider body, the divider body being an inverted trapezoid wider at the top and narrower at the bottom, the divider body having an inner cavity and liquid outlet holes, the inner cavity being formed within the divider body, the liquid outlet holes being formed at the side end of the inner cavity, and the liquid outlet holes being arrayed at both ends of the divider body, the liquid outlet holes being used to uniformly output waterproof coating.
[0006] Preferably, the separator strip body has an inner groove, which is used to divide the separator strip body into two parts, so that the separator strip body has a stronger deformation capacity and can withstand greater extrusion pressure from the expansion of concrete at both ends.
[0007] Preferably, the roof partition assembly further includes a rubber pad, which is also in the shape of an inverted trapezoid that is wider at the top and narrower at the bottom. The rubber pad is fixed in the inner groove and is used to absorb the compressive force of the partition strip bodies at both ends.
[0008] Preferably, the roof partition assembly further includes a waterproof cover plate, which is installed on the top of the partition strip body and is used for waterproofing.
[0009] Preferably, the bottom end of the waterproof cover is provided with a sliding groove, and the top end of the separator strip body is fixedly connected to a slide rail, with the sliding groove slidably connected within the slide rail.
[0010] Preferably, the top of the slide rail is provided with a filler port, which is used to pour waterproof coating into the inner cavity.
[0011] This utility model discloses a PVC trapezoidal roof divider strip, which has the following beneficial effects: The PVC trapezoidal roof divider strip adopts a trapezoidal cross-section with a beveled edge design, which can more efficiently disperse the stress caused by temperature changes and material shrinkage and expansion, and has higher hardness. Compared with extruded polystyrene board, it has stronger bending resistance and effectively ensures the stability of the roof structure. In addition, the array of liquid outlet holes allows the waterproof coating to be evenly poured into the joint between the divider strip and the concrete, which is convenient to pour. The waterproof cover plate prevents rainwater from affecting the divider strip. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall front structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;
[0015] Figure 3 This is a schematic diagram of the overall structure of the waterproof cover plate of this utility model;
[0016] Figure 4 This is a schematic diagram of the overall structure of the separator strip body of this utility model.
[0017] In the diagram: 1. Roof partition component; 11. Partition strip body; 111. Filler inlet; 112. Slide rail; 113. Inner cavity; 114. Inner groove; 115. Liquid outlet; 12. Rubber pad; 13. Waterproof cover plate; 131. Slide groove. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] This application provides a PVC trapezoidal roof expansion joint strip, addressing numerous shortcomings in existing roof expansion joint construction techniques. Traditional expansion joint materials are ineffective in dispersing stress and resisting deformation, making them unsuitable for the deformation requirements of steel structure roofs; the application of waterproof coating within the expansion joint is not always reasonable, resulting in inaccurate and uneven application of the coating to every crack; furthermore, the low degree of material prefabrication during construction leads to low efficiency and high costs, failing to meet the needs of modern industrial plant construction.
[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0021] This utility model discloses a PVC trapezoidal roof divider.
[0022] Example 1
[0023] According to the appendix Figure 1-4 As shown, the roof partition assembly 1 includes a partition strip body 11, which is an inverted trapezoidal shape that is wider at the top and narrower at the bottom. The partition strip body 11 has an inner cavity 113 and liquid outlet holes 115. The inner cavity 113 is opened inside the partition strip body 11, and the liquid outlet holes 115 are opened on the side of the inner cavity 113. The liquid outlet holes 115 are arrayed at both ends of the partition strip body 11. The liquid outlet holes 115 are used to uniformly output waterproof coating. The design of the inclined side of the trapezoidal cross section can more effectively disperse the stress generated by temperature changes or material shrinkage and expansion, and it has high hardness and is less prone to bending compared with extruded polystyrene board.
[0024] The partition strip body 11 has an inner groove 114 inside, which is used to divide the partition strip body 11 into two parts, making the partition strip body 11 more deformable and able to withstand greater extrusion pressure from the expansion of concrete at both ends. The roof partition component 1 also includes a rubber pad 12, which is also in the shape of an inverted trapezoid that is wider at the top and narrower at the bottom. The rubber pad 12 is fixed in the inner groove 114 and is used to absorb the extrusion pressure of the partition strip body 11 at both ends.
[0025] Example 2
[0026] Based on Example 1, according to Appendix Figure 1-4 As shown, the roof partition assembly 1 includes a partition strip body 11, which is an inverted trapezoidal shape that is wider at the top and narrower at the bottom. The partition strip body 11 has an inner cavity 113 and liquid outlet holes 115. The inner cavity 113 is opened inside the partition strip body 11, and the liquid outlet holes 115 are opened on the side of the inner cavity 113. The liquid outlet holes 115 are arrayed at both ends of the partition strip body 11, and the liquid outlet holes 115 are used to uniformly output waterproof coating.
[0027] The roof partition component 1 also includes a waterproof cover plate 13, which is installed on the top of the partition strip body 11. The waterproof cover plate 13 is used for waterproofing. A groove 131 is provided at the bottom of the waterproof cover plate 13. A slide rail 112 is fixedly connected to the top of the partition strip body 11. The groove 131 is slidably connected in the slide rail 112. A filler port 111 is provided at the top of the slide rail 112. The filler port 111 is used to pour waterproof coating into the inner cavity 113. The waterproof coating is poured into the gap between the partition strip body 11 and the concrete. This product can react with moisture in the air to form a flexible rubber waterproof membrane with good waterproof effect; it has high strength, large elongation, good resilience, strong resistance to base deformation, water erosion resistance, chemical corrosion resistance, mildew resistance, and high temperature resistance, with a maximum temperature resistance of 40℃.
[0028] Roof expansion joints are pre-reserved using PVC trapezoidal separator strips, with a joint width and depth of 20mm, and are filled with single-component polyurethane waterproof coating. The standard process flow for the roof waterproof protective layer is as follows: base cleaning → measurement and positioning → steel mesh binding → setting roof expansion joints no larger than 4m*4m → pouring the roof waterproof protective layer → leveling and finishing → curing and grouting. The grouting uses single-component polyurethane waterproof coating injected into the filler inlet 111.
[0029] 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 PVC trapezoidal roof divider, comprising a roof divider assembly (1), characterized in that, The roof partition assembly (1) includes a partition strip body (11), which is an inverted trapezoidal shape that is wider at the top and narrower at the bottom. The partition strip body (11) contains: The inner cavity (113) is formed within the partition strip body (11); Liquid outlet (115) is provided at the side of the inner cavity (113). The liquid outlet (115) array is distributed at both ends of the separator body (11). The liquid outlet (115) is used to uniformly output waterproof coating.
2. The PVC trapezoidal roof divider strip according to claim 1, characterized in that: The separator body (11) has an inner groove (114) inside. The inner groove (114) is used to divide the separator body (11) into two parts, so that the separator body (11) has a stronger deformation capacity and can withstand greater extrusion pressure from the expansion of concrete at both ends.
3. A PVC trapezoidal roof divider according to claim 2, characterized in that: The roof partition assembly (1) also includes a rubber pad (12), which is also an inverted trapezoid with a wider top and a narrower bottom. The rubber pad (12) is fixed in the inner groove (114) and is used to absorb the squeezing force of the partition strip body (11) at both ends.
4. A PVC trapezoidal roof divider according to claim 1, characterized in that: The roof partition assembly (1) also includes a waterproof cover plate (13), which is installed on the top of the partition strip body (11) and is used for waterproofing.
5. A PVC trapezoidal roof divider according to claim 4, characterized in that: The bottom end of the waterproof cover plate (13) is provided with a sliding groove (131), and the top end of the separator strip body (11) is fixedly connected with a slide rail (112). The sliding groove (131) is slidably connected in the slide rail (112).
6. A PVC trapezoidal roof divider according to claim 5, characterized in that: The top of the slide rail (112) is provided with a filling port (111), which is used to pour waterproof coating into the inner cavity (113).