A fixing structure for H-shaped steel beam rock wool inner insulation board

Abstract

The utility model discloses a fixed structure for H shaped steel roof rock wool inner insulation board belongs to building outer wall inner insulation technical field. The structure is arranged rock wool inner insulation board in H shaped steel roof web inner side fire -retardant coating surface, and at least a pair of angle steel is arranged as rigid pressure holding piece along longitudinal direction interval, and one limb of angle steel is continuously fillet welded with web, and the other limb applies positive pressure to the insulation board, so that it is mechanically clamped and does not need adhesive. The angle steel spacing, thickness and weld are optimized gradually, and wind resistance, earthquake resistance and steel consumption are considered. The insulation board can be replaced by a single person from the side without damaging the fire -retardant coating. Compared with the existing adhesive scheme, the utility model completely eliminates the hidden danger of adhesive aging and peeling, realizes maintenance -free in the whole life cycle, construction is efficient, cost is low, and is suitable for steel structure building outer wall inner insulation engineering.

Description

Technical Field

[0001] This utility model relates to the field of building exterior wall interior insulation technology, specifically a fixing structure for rock wool interior insulation boards for H-shaped steel beams. Background Technology

[0002] In steel-structured public buildings and high-rise residential buildings, rock wool insulation boards are typically installed on the inner side of the exterior walls to meet energy-saving and fire-resistant requirements. In H-beam areas, because the web surface is already coated with a fire-retardant layer, conventional insulation nails or expansion anchors cannot be used. On-site, adhesives or bonding plaster are often used to directly adhere the rock wool boards to the fire-retardant coating. However, the adhesive layer is susceptible to aging due to moisture, temperature differences, and long-term loads, leading to loosening, hollowing, or even detachment of the insulation boards. Furthermore, repairs and replacements require removing the adhesive layer, which easily damages the fire-retardant coating, resulting in a large workload and high costs. Therefore, there is an urgent need for a fixing structure that does not rely on adhesives, can maintain reliability over a long period, and is easy to replace. Utility Model Content

[0003] This utility model aims to solve the defects of existing H-shaped steel beam inner rock wool insulation boards that loosen, fall off, and are difficult to replace due to adhesive aging. It provides a fixing structure that does not require adhesive, has reliable load-bearing capacity, can be quickly disassembled and reassembled by a single person, and can be reused, so as to significantly improve the durability and maintenance convenience of the external wall internal insulation system.

[0004] To achieve the above objectives, this utility model is implemented as follows: A fixing structure for rock wool internal insulation boards on H-shaped steel beams includes an H-shaped steel beam (1) with a fireproof coating (2) on the inner side of its web, and also includes... Rock wool inner insulation board (3) is attached to the surface of the fireproof coating (2); and At least one pair of rigid clamping members (4) arranged longitudinally along the steel beam, the clamping members (4) comprising: - The first limb, directly or indirectly connected to the ventral plate; - The second limb applies a positive pressure perpendicular to the surface of the rock wool inner insulation board (3); The pressing member (4) is fixed to the web plate through the connecting part (5), so that the rock wool inner insulation board (3) is mechanically clamped without the need for adhesive.

[0005] Furthermore, the rigid support member is preferably made of angle steel, and the connection part is a fillet weld. The material is readily available on site, construction habits are consistent, and the cost of process switching is reduced.

[0006] Furthermore, the longitudinal spacing L of the clamping components should be controlled within 300 mm ≤ L ≤ 1000 mm to balance steel consumption and vibration resistance requirements. When the building is located in a high wind pressure or strong earthquake zone, 300 mm can be used; in conventional areas, 600–800 mm is sufficient.

[0007] Furthermore, the thickness of the pressing component is ≥3 mm, and the outer surface of the second limb is flush with or recessed by no more than 2 mm from the outer surface of the insulation board to ensure that the thickness of the subsequent decorative layer is consistent and to avoid secondary leveling.

[0008] Furthermore, the connection part adopts a continuous fillet weld along the entire length of the pressure holding member, and a uniform anti-corrosion coating is applied after welding, which solves the strength and durability issues in one go, and the design service life is the same as that of the main structure.

[0009] Furthermore, when the fireproof coating is thick or the fire resistance limit requirement is high, a fireproof gasket can be added between the retainer and the web to keep the heat source of the weld away from the coating, avoid local burn-off, and ensure that the fireproof performance is not weakened.

[0010] Furthermore, the height of the rock wool inner insulation board is equal to that of the web plate. After installation, it is only constrained by the upper and lower pressure components. When replacing it, it can be pulled out from the side by a single person without damaging the fireproof coating, achieving truly maintenance-free replacement.

[0011] Furthermore, the materials for the pressure-holding components can be selected from hot-rolled angle steel, cold-formed thin-walled steel, or laser-welded angle steel, with the steel grade matching that of the H-beam to meet the needs of various scenarios in terms of strength, fire resistance, and economy.

[0012] By adopting the layered progressive structure of this utility model, the rock wool internal insulation board is continuously and evenly clamped on the surface of the fireproof coating. This completely eliminates the risk of loosening and falling off caused by adhesive aging and moisture erosion. Furthermore, the detachable mechanical connection provides the board with the ability to be quickly replaced by a single person throughout its entire life cycle. At the same time, the continuous fillet welds and anti-corrosion coating at the welding points ensure that the connection strength and durability reach the same design life as the main structure. The multi-level optimization of spacing, thickness, and materials saves steel and simplifies construction while taking into account the requirements of high wind pressure and seismic resistance. This ensures that the entire external wall internal insulation system maintains complete insulation and fireproof performance during long-term operation and significantly reduces later maintenance costs and material waste. Attached Figure Description

[0013] Figure 1 This is a front view of the H-shaped steel beam rock wool internal insulation board after installation.

[0014] Figure 2 for Figure 1 Side view.

[0015] Figure 3 for Figure 1 A three-dimensional image. Detailed Implementation

[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0017] like Figure 1 , Figure 2 As shown, a fixing structure for rock wool internal insulation boards in H-shaped steel beams includes: 1. Grassroots processing The H-beam 1 has been coated with fire-retardant coating 2 at the factory or on-site and has passed inspection. Before installing the insulation board, use a wire brush and dry compressed air to remove floating dust, oil stains and loose particles from the inner surface of the web, and keep it dry with a moisture content ≤8%.

[0018] 2. Laying out and cutting materials According to the net height H of the steel beam web given in the construction drawings, the rock wool inner insulation board 3 is cut into strips with a height of H and a length of 600 mm. At the same time, a longitudinal baseline is marked on the inner surface of the web, and a transverse centerline is marked according to the 600 mm module to ensure that the adjacent plate joints correspond to the positions of the angle steel.

[0019] 3. Pre-assembly and numbering Push the cut rock wool boards into the web cavity one by one, and check that the gaps between boards and between boards and flanges are ≤2 mm; locally trim any excess parts, and mark the ends of the boards with a marker to prevent confusion during formal installation.

[0020] 4. Angle steel cutting and hole making L50×50×4 hot-rolled angle steel is selected as the pressure holding component 4, and the cutting length is equal to the width of the rock wool board + 10 mm (leaving room for welding shrinkage). When the fire resistance limit of the project is ≥2 h, φ6 fireproof vent holes are punched in the first leg of the angle steel (the leg attached to the web plate), with a hole spacing of 200 mm, to reduce the steam pressure between the angle steel and the fireproof coating at high temperatures.

[0021] 5. Temporary clamping Push the rock wool board back into place, and slide the angle steel 4 in from both the top and bottom sides at the same time, so that the end of the second leg is 0-1 mm away from the plate surface, forming a slight interference; at this time, a uniform gap of 1-2 mm appears between the angle steel and the web, which is convenient for subsequent welding.

[0022] 6. Spot welding positioning Use φ3.2 E4303 welding rod to spot weld 30 mm at each end of the angle steel, with a weld leg height of 4 mm; after spot welding, re-inspect the straightness of the angle steel to be ≤1 mm / 2 m. If it exceeds the tolerance, use a copper hammer to gently tap and correct it.

[0023] 7. Continuous fillet weld CO2 gas shielded welding was used with ER50-6 φ1.2 welding wire, 180 A current, 22 V voltage, and a welding speed of 350 mm / min. Welding was performed along the entire length of the angle steel to form an isosceles fillet weld 5 with a leg height of 5 mm. The welding sequence was to symmetrically back weld from the middle of the span to both ends to reduce wave deformation.

[0024] 7. Post-weld corrosion protection After the weld has cooled naturally, use an electric wire wheel to remove the slag and spatter, apply two coats of epoxy zinc-rich primer with a dry film thickness of 80 μm, and then apply a coat of polyurethane topcoat in the same color as the fireproof coating to ensure a corrosion protection life of ≥25 years.

[0025] 8. Change the demo After several years of use, if the third rock wool board is damaged by impact, simply cut the weld seams of the two angle steels corresponding to the board, use an angle grinder to cut off the angle steel flush with the web, remove the old board, insert the new board, and then follow steps 5 to 8 to replace the angle steel of the same specification and touch up the paint. This can be completed by one person in 30 minutes, and the fireproof coating 2 remains intact.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fixing structure for rock wool internal insulation boards on H-shaped steel beams, comprising an H-shaped steel beam (1) having a fireproof coating (2) on the inner side of its web; characterized in that: Also includes Rock wool inner insulation board (3) is attached to the surface of the fireproof coating (2); and At least one pair of rigid clamping members (4) arranged longitudinally along the steel beam, the clamping members (4) comprising: - The first limb, directly or indirectly connected to the ventral plate; - The second limb applies a positive pressure perpendicular to the surface of the rock wool inner insulation board (3); The pressing member (4) is fixed to the web plate through the connecting part (5), so that the rock wool inner insulation board (3) is mechanically clamped without the need for adhesive.

2. The fixing structure for rock wool internal insulation board of H-shaped steel beams according to claim 1, characterized in that: The rigid holding member (4) is an angle steel, and the connecting part (5) is a fillet weld.

3. The fixing structure for rock wool internal insulation board of H-shaped steel beams according to claim 1 or 2, characterized in that: The spacing L of the holding member (4) along the longitudinal direction of the steel beam satisfies 300 mm ≤ L ≤ 1000 mm.

4. The fixing structure for rock wool internal insulation board of H-shaped steel beams according to any one of claims 1-3, characterized in that: The thickness of the pressing member (4) is ≥3 mm, and the outer surface of its second limb is flush with or recessed by no more than 2 mm from the outer surface of the rock wool inner insulation board (3).

5. The fixing structure for rock wool internal insulation board of H-shaped steel beams according to claim 1, characterized in that: The connecting part (5) is a continuous fillet weld along the entire length of the pressure member (4), and the surface is covered with an anti-corrosion coating after welding.

6. The fixing structure for rock wool internal insulation board of H-shaped steel beams according to any one of claims 1-5, characterized in that: A fireproof gasket (6) is added between the pressure member (4) and the web plate to keep the weld away from the surface of the fireproof coating (2).

7. The fixing structure for rock wool internal insulation board of H-shaped steel beams according to claim 1, characterized in that: The height of the rock wool inner insulation board (3) is equal to the height of the web, and it can be pulled out and replaced by a single person without damaging the fireproof coating (2).

8. The fixing structure for rock wool internal insulation board of H-shaped steel beams according to any one of claims 1-7, characterized in that: The pressing member (4) is any one of hot-rolled angle steel, cold-formed thin-walled steel or laser-welded angle steel, and its steel grade matches that of the H-beam (1).

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