Fabricated steel structure rural house roof waterproof structure
By using a modular design and sealant, the water seepage problem caused by the fixing method of corrugated steel sheets was solved, achieving stable installation and improved waterproof performance of the corrugated steel sheets, reducing maintenance and repair difficulties, and extending the service life of the house.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU BUILDING RES INST CO LTD
- Filing Date
- 2025-02-20
- Publication Date
- 2026-04-24
AI Technical Summary
The existing method of fixing corrugated steel sheets causes water seepage problems, especially the self-tapping screws that penetrate the corrugated steel sheets, damaging their integrity and causing seepage points. The waterproof adhesive is also prone to aging and failure, affecting the service life of farmhouses and maintenance costs.
The design employs a locking block assembly, including an upper locking block, a limit locking block, and a lower locking block, to secure the corrugated steel sheet through a non-destructive installation method. Self-tapping screws are driven in from below, and combined with sealant and an arched ridge cover plate, it enhances connection stability and sealing.
It enables non-destructive installation of color steel tiles, prevents leaks, enhances the waterproof performance of the roof, reduces maintenance and construction costs, improves durability and safety, extends service life and maintainability, reduces maintenance and construction reliability, significantly improves the waterproof performance of the roof, and extends the service life of the house.
Smart Images

Figure CN224161308U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building waterproofing technology, and in particular relates to a waterproofing structure for the roof of a prefabricated steel structure farmhouse. Background Technology
[0002] Prefabricated steel structure farmhouses, as a modern architectural form, have been widely used in rural areas due to their advantages such as fast construction speed, structural stability, and ease of maintenance. Among these features, the waterproof roof structure is a crucial component, directly affecting the building's lifespan and living comfort. In the construction of steel structure farmhouses, color steel sheets are frequently used as roofing structural materials due to their lightweight, high strength, and corrosion resistance.
[0003] The existing method of fixing corrugated steel sheets is usually to fix them to square tubes by drilling through with self-tapping screws. Although this method is simple and quick, it brings a significant waterproofing problem. Because the holes of the self-tapping screws damage the integrity of the corrugated steel sheets, these locations become potential seepage points. Even if waterproof adhesive is applied to repair these defects during construction, the waterproof adhesive is prone to aging and failure after prolonged exposure to the outdoor environment, especially under the influence of sunlight and rain, leading to the recurrence of leakage problems. This not only affects the normal use of the farmhouse, but also increases maintenance costs and difficulty.
[0004] Therefore, we propose a prefabricated steel structure roof waterproofing structure for rural houses to solve the above problems. Utility Model Content
[0005] The purpose of this utility model is to solve the problem of water seepage caused by the installation of self-tapping screws on the roof of steel structure farmhouses in the prior art, and to propose a prefabricated waterproof structure for the roof of steel structure farmhouses.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A prefabricated steel structure roof waterproofing structure for farmhouses includes a steel frame structure and color steel tiles laid on the steel frame structure. The steel frame structure includes steel beams and multiple installation square tubes arranged horizontally on the steel beams. The color steel tiles are installed overlapping from bottom to top along the direction of the steel beams, with the upper edge of the color steel tile pressed under the adjacent color steel tile above, forming an overlapping area.
[0008] The corrugated steel sheet is provided with multiple sets of locking blocks along the length of the installation square tube. The locking block set includes an upper locking block, a limiting locking block, and a lower locking block arranged from high to low along the length of the steel beam. The upper locking block can overlap with the lower locking block on the adjacent corrugated steel sheet and be fixed to the installation square tube by self-tapping screws.
[0009] Preferably, the upper locking block, the limiting locking block, and the lower locking block all correspond to the mounting square tube, wherein the mounting square tube corresponding to the upper locking block and the lower locking block is provided with an installation port that can accommodate the upper locking block and the lower locking block.
[0010] Preferably, a limiting slot is provided on the mounting square tube corresponding to the limiting block, and the limiting block can be inserted into the limiting slot by moving laterally when the color steel tile is attached to the upper surface of the mounting square tube.
[0011] Preferably, both the upper and lower locking blocks are L-shaped, and their openings face each other. When the corrugated steel sheets are installed in overlapping positions, the lower locking block is located inside the opening of the upper locking block.
[0012] Preferably, the height of the upper clamping block is greater than that of the lower clamping block, and when the color steel tile is attached to the upper surface of the square tube, the bottom surface of the upper clamping block is attached to the bottom surface of the installation opening.
[0013] Preferably, it also includes a ridge cover plate with an arc-shaped cross-section, and the bottom surface of the ridge cover plate has two symmetrically arranged lower locking blocks.
[0014] Preferably, the overlapping areas of the color steel tiles are coated with sealant.
[0015] In summary, the technical effects and advantages of this utility model are as follows: This prefabricated steel structure farmhouse roof waterproofing structure, through the design of the clamping block assembly, achieves stable installation of the color steel tiles without damage. Since there are no perforations during the installation of the color steel tiles, there are no leakage points, achieving effective waterproofing. The cooperation between the upper and lower clamping blocks, as well as the pulling force on the lower clamping block when the self-tapping screws are driven into the installation square tube from below, compress the overlapping areas of the color steel tiles, reduce the gaps in the overlapping areas of the color steel tiles, effectively prevent rainwater penetration, significantly improve the waterproofing performance of the roof, and extend the service life of the house.
[0016] The design of the locking block assembly not only solves the waterproofing problem, but also enhances the connection stability between the corrugated steel sheet and the installation square tube. The combined use of the upper locking block, the limiting locking block and the lower locking block makes the corrugated steel sheet more secure on the installation square tube, improving the stability and wind pressure resistance of the entire roof structure.
[0017] Because the upper and lower locking blocks have corresponding openings, there is a certain range of motion between them after the self-tapping screws are removed. Combined with the elasticity of the corrugated steel sheet itself, this allows the corrugated steel sheet to be replaced without removing adjacent sheets. This greatly reduces the difficulty and cost of maintenance and repair, and improves the maintainability of the house. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a side view of the present invention.
[0020] Figure 3 This is a schematic diagram of the structure of the color steel tile in this utility model;
[0021] Figure 4 for Figure 2 A magnified structural diagram of part A in the middle;
[0022] Figure 5 for Figure 2 A magnified structural diagram of part B in the middle section;
[0023] Figure 6 for Figure 2 A magnified structural diagram of section C;
[0024] Figure 7 This is a structural diagram of the color steel tile of this utility model in the dismantled state;
[0025] Figure 8 This is a schematic diagram of the transverse connection structure of the color steel tile of this utility model.
[0026] In the diagram: 1. Steel beam; 2. Installed square tube; 21. Installation port; 22. Limiting latch; 3. Color steel sheet; 31. Upper latch; 32. Limiting latch; 33. Lower latch; 34. Self-tapping screw; 4. Roof ridge cover. Detailed Implementation
[0027] Reference Figure 1-3 A prefabricated steel structure farmhouse roof waterproofing structure includes a steel frame structure and color steel tiles 3 laid on the steel frame structure. The steel frame structure is a common umbrella-shaped structure for steel structure roofs. The steel frame structure includes steel beams 1 and multiple installation square tubes 2 arranged horizontally on the steel beams 1. The installation square tubes 2 are welded and fixed to the steel beams 1. The color steel tiles 3 are installed overlapping from bottom to top along the direction of the steel beams 1. The upper edge of the color steel tile 3 is pressed under the lower edge of the adjacent color steel tile 3 above, forming an overlapping area a. Due to the existence of the overlapping area a, when rainwater flows downward on the color steel tile 3, it will flow directly to the lower color steel tile 3 under the action of gravity.
[0028] Multiple sets of locking blocks are arranged along the length of the installation square tube 2 for the color steel tile 3. The locking blocks enable non-destructive installation of the color steel tile 3. The locking blocks include an upper locking block 31, a limiting locking block 32, and a lower locking block 33 arranged from high to low along the length of the steel beam 1. The upper locking block 31, the limiting locking block 32, and the lower locking block 33 all correspond to the installation square tube 2. The installation square tube 2 corresponding to the upper locking block 31 and the lower locking block 33 has an installation opening 21 that can accommodate the upper locking block 31 and the lower locking block 33. During installation, the tiles are laid from bottom to top so that the upper locking block 31 and the lower locking block 33 are locked into the corresponding installation opening 21. Then, the upper layer of color steel tile 3 is laid so that the lower locking block 33 is locked into the opening of the upper locking block 31 of the lower color steel tile 3.
[0029] The upper locking block 31 and the lower locking block 33 on the adjacent color steel tile 3 are overlapped and fixed to the mounting square tube 2 by self-tapping screws 34. The self-tapping screws 34 are positioned corresponding to the mounting opening 21 and are drilled from below the mounting square tube 2 until they penetrate the locking block 31 and the lower locking block 33, and are then tightened. The length of the self-tapping screws 34 is not greater than the width of the mounting square tube 2, so the self-tapping screws 34 will not penetrate the color steel tile 3 and will not damage the structure of the color steel tile 3. Compared with the traditional color steel tile installation method, it can avoid water seepage at the drilling position of the self-tapping screws 34.
[0030] Reference Figure 3-7 Both the upper locking block 31 and the lower locking block 33 are L-shaped, and their openings face each other. When the corrugated steel sheets 3 are installed in overlapping positions, the lower locking block 33 is located inside the opening of the upper locking block 31. Therefore, when the self-tapping screw 34 is not installed, the corrugated steel sheets 3 are only held in place at the installation opening 21 by the upper locking block 31 and the lower locking block 33. The upper locking block 31 and the lower locking block 33 can move within a certain range in the longitudinal direction. When it is necessary to remove the corrugated steel sheets 3 for maintenance, after removing the self-tapping screw 34, the corrugated steel sheets 3 can be replaced without removing adjacent sheets due to their elasticity. This reduces the difficulty and cost of maintenance and repair, and improves the maintainability of the house.
[0031] Reference Figure 8 When the color steel sheet 3 is connected horizontally, an alternating connection method can be used. It is necessary to ensure that the corrugations of two adjacent color steel sheet 3s interlock, that is, both sides of the same color steel sheet 3 are located above or below the adjacent color steel sheet 3s. Therefore, when both sides of the color steel sheet 3 are located above the adjacent color steel sheet 3s, it is not necessary to remove the adjacent color steel sheet 3s. When both sides of the color steel sheet 3 are located below the adjacent color steel sheet 3s, since the sides of the color steel sheet 3s are pressed down, it is necessary to remove the two adjacent color steel sheet 3s to expose the damaged color steel sheet 3s.
[0032] To reduce the gap in the overlapping area a and prevent rainwater backflow in case of heavy rainfall, the upper clamping block 31 is higher than the lower clamping block 33. When the corrugated steel sheet 3 is attached to the upper surface of the square tube 2, the bottom surface of the upper clamping block 31 is attached to the bottom surface of the installation opening 21. The self-tapping screw 34 is continuously driven into the upper clamping block 31 and the lower clamping block 33. As the self-tapping screw 34 rotates, the upper clamping block 31 is attached to the installation opening 21. As the self-tapping screw 34 is pulled down, the corrugated steel sheet 3 is pressed down with the lower clamping block 33, which compresses the overlapping area a of the corrugated steel sheet 3, reduces the gap in the overlapping area a of the corrugated steel sheet 3, effectively prevents rainwater penetration, and significantly improves the waterproof performance of the roof.
[0033] Reference Figure 3-7 The installation square tube 2 corresponding to the limiting block 32 has a limiting slot 22. When the color steel tile 3 is attached to the upper surface of the installation square tube 2, the limiting block 32 can be inserted into the limiting slot 22 by moving laterally. Through the cooperation of the limiting block 32 and the limiting slot 22, a certain support is provided for the middle part of the color steel tile 3 to ensure the stability of the color steel tile 3.
[0034] Reference Figure 3-7 It also includes a ridge cover plate 4 with an arc-shaped cross section. The bottom surface of the ridge cover plate 4 has two symmetrically arranged lower locking blocks 33. The ridge cover plate 4 is raised upward. The lower locking blocks 33 at the bottom of the ridge cover plate 4 correspond to the upper locking blocks 31 at the top of the color steel tiles 3 on both sides of the roof. The connection method is the same as the connection between the color steel tiles 3. The ridge cover plate 4 covers the ridge joint position to achieve effective waterproofing.
[0035] The overlapping area of the color steel tile 3, where phase a is in contact, is coated with sealant. The sealant further improves the sealing performance of the connection between the color steel tile 3 and reduces the risk of water seepage and rainwater backflow.
[0036] Working principle:
[0037] During installation, the corrugated steel sheets 3 are laid from bottom to top, so that the upper clip 31 and the lower clip 33 are both inserted into the corresponding installation openings 21. Then, the upper layer of corrugated steel sheets 3 is laid, so that the lower clip 33 of the upper corrugated steel sheet 3 is inserted into the opening of the upper clip 31 of the lower corrugated steel sheet 3. The self-tapping screws 34 are drilled into the installation square tube 2 from below, corresponding to the position of the installation opening 21. The self-tapping screws 34 continuously drive into the upper clip 31 and the lower clip 33. As the self-tapping screws 34 rotate, the upper clip 31 comes into contact with the installation opening 21. As the self-tapping screws 34 are pulled down, the corrugated steel sheets 3 are pressed down with the lower clip 33, so that the overlapping area of the corrugated steel sheets 3 is pressed tightly, reducing the gap in the overlapping area of the corrugated steel sheets 3. After tightening the self-tapping screws 34, stop. Continue in this way until the roof ridge cover 4 is installed in the same way.
[0038] When one of the corrugated steel sheets 3 is damaged, it is not necessary to remove all the corrugated steel sheets 3 from top to bottom. It is only necessary to remove the self-tapping screws 34 corresponding to the upper clip 31 and the lower clip 33 of the damaged corrugated steel sheet 3, so that the upper clip 31 and the lower clip 33 on the adjacent corrugated steel sheet 3 can move within a small range. By bending the corrugated steel sheet 3, the upper clip 31 and the adjacent lower clip 33 can be separated. Then the damaged corrugated steel sheet 3 can be pulled upward. Alternatively, a new corrugated steel sheet 3 can be replaced in the reverse order. Since the corrugated steel sheet 3 can be replaced without removing the adjacent sheets, this greatly reduces the difficulty and cost of maintenance and repair, and improves the maintainability of the house.
Claims
1. A prefabricated steel structure roof waterproofing structure for farmhouses, comprising a steel frame structure and color steel tiles (3) laid on the steel frame structure, wherein the steel frame structure includes steel beams (1) and a plurality of installation square tubes (2) arranged transversely on the steel beams (1), characterized in that, The color steel tile (3) is installed overlapping from bottom to top along the direction of the steel beam (1), and the upper edge of the color steel tile (3) is pressed under the adjacent color steel tile (3) above, forming an overlapping area; The color steel tile (3) is provided with multiple sets of clamping blocks along the length of the installation square tube (2). The clamping block sets include an upper clamping block (31), a limiting clamping block (32), and a lower clamping block (33) arranged from high to low along the length of the steel beam (1). The upper clamping block (31) can overlap with the lower clamping block (33) on the adjacent color steel tile (3) and be fixed to the installation square tube (2) by self-tapping screws (34).
2. The prefabricated steel structure farmhouse roof waterproofing structure according to claim 1, characterized in that, The upper locking block (31), the limiting locking block (32), and the lower locking block (33) are all corresponding to the mounting square tube (2). The mounting square tube (2) corresponding to the upper locking block (31) and the lower locking block (33) is provided with an installation port (21) that can accommodate the upper locking block (31) and the lower locking block (33).
3. The prefabricated steel structure farmhouse roof waterproofing structure according to claim 2, characterized in that, A limiting slot (22) is provided on the mounting square tube (2) corresponding to the limiting block (32). The limiting block (32) can be inserted into the limiting slot (22) when the color steel tile (3) is attached to the upper surface of the mounting square tube (2).
4. The prefabricated steel structure farmhouse roof waterproofing structure according to claim 2, characterized in that, The upper card block (31) and the lower card block (33) are both L-shaped, and the opening directions of the upper card block (31) and the lower card block (33) are facing each other. When the color steel tile (3) is installed in an overlapping manner, the lower card block (33) is located inside the opening of the upper card block (31).
5. The prefabricated steel structure farmhouse roof waterproofing structure according to claim 2, characterized in that, The height of the upper clip (31) is greater than that of the lower clip (33). When the color steel tile (3) is attached to the upper surface of the square tube (2), the bottom surface of the upper clip (31) is attached to the bottom surface of the installation port (21).
6. The prefabricated steel structure farmhouse roof waterproofing structure according to claim 2, characterized in that, It also includes an arc-shaped ridge cover plate (4), the bottom surface of which has two symmetrically arranged lower locking blocks (33).
7. The prefabricated steel structure farmhouse roof waterproofing structure according to claim 1, characterized in that, The overlapping areas of the color steel tile (3) are coated with sealant.