Heat preservation and sound insulation floor support plate of assembly type disassembly-free composite bottom die
By using a non-removable composite bottom formwork structure and steel truss design, the technical challenges of thermal insulation and sound insulation in prefabricated floor slabs have been solved, achieving efficient construction and excellent sound insulation and thermal insulation performance, thus meeting the requirements for building energy conservation and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-07
AI Technical Summary
Existing prefabricated floor slabs cannot meet high standards of thermal insulation and sound insulation requirements, and are prone to cracking and grout leakage during transportation and construction, which increases the difficulty of construction.
The structure adopts a non-removable composite bottom formwork structure, including profiled steel sheet, sound insulation material layer, thermal insulation material layer and bottom plate layer. Combined with steel truss design, it is fixed by self-tapping screws to achieve stable overlap between the panels and tightly bond with the concrete after concrete pouring.
Simplify the construction process, reduce costs, improve the sound insulation and thermal insulation performance of buildings, enhance structural stability, prevent cracking, and meet the requirements for building energy conservation and environmental protection.
Smart Images
Figure CN224092812U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building component technology, specifically to a prefabricated, non-removable composite bottom formwork thermal insulation and soundproof floor deck. Background Technology
[0002] With the implementation of the new national housing standards, building "good houses" has become the main theme of the construction market. The standards for exterior wall insulation and soundproofing are getting higher and higher, with noise reduction requirements below 65 decibels. The previous prefabricated floor slabs could not meet this requirement. PC floor slabs and fine stone concrete cannot be prefabricated to install sound insulation layers and insulation boards. Moreover, 20mm thick fine stone concrete floor decks are prone to cracking during transportation, which makes repair difficult. The joints are also prone to cracking. In addition, the bottom fiberglass mesh is prone to leakage of grout and whitening, making on-site repair difficult. It is not as strong as high-density calcium silicate board.
[0003] Previously, only the thermal insulation function was considered, and glass wool was used for thermal insulation, but the sound insulation effect was poor and could not meet the requirements of the new national standards. Therefore, this application responds to the new national requirements, starts from a high level, strengthens the sound insulation effect of the sound insulation layer, and has a simple and convenient production process, which is suitable for production at all scales and is more in line with the conditions of my country's construction market. Therefore, this invention is hereby promoted.
[0004] Against this backdrop, this application aims to address the quality deficiencies of existing technologies, and to achieve a prefabricated, non-removable composite bottom formwork for thermal and sound insulation floor decking that integrates building protection, thermal insulation, sound insulation, and crack prevention functions, while simplifying the construction process and reducing overall costs. Utility Model Content
[0005] To address the aforementioned deficiencies in existing technologies, this utility model provides a prefabricated, non-removable composite bottom formwork insulated and soundproof floor decking, aiming to solve the problems in the prior art. This utility model provides the following technical solution, including:
[0006] The non-removable composite bottom formwork, and several sets of equally spaced steel trusses welded onto the non-removable composite bottom formwork, with the interior of the steel trusses used for filling concrete;
[0007] The non-removable composite bottom formwork includes a profiled steel sheet, a sound insulation material layer, a thermal insulation material layer, and a bottom plate layer. The sound insulation material layer is disposed on either the upper or lower side of the thermal insulation material layer. The steel truss is welded to the profiled steel sheet, which is disposed above the thermal insulation material layer. The profiled steel sheet is a galvanized steel sheet that has been roll-formed and cold-bent to form a micro-wave cross section along the width direction. The galvanized steel sheet has male and female grooves on both sides for overlapping between the plates to prevent grout leakage during concrete pouring.
[0008] The steel truss includes top chord bars, bottom chord bars, web bars, and support bars connected to the ends of the top and bottom chord bars. The top and bottom chord bars are arranged parallel to each other and have a triangular cross-section. The web bars are welded to the top and bottom chord bars and have a bend at the weld with the bottom chord bar. The bend is welded to the profiled steel sheet. The support bars include support horizontal bars welded to the bottom chord bars and support vertical bars welded to the top chord bars and support horizontal bars.
[0009] Furthermore, the insulation material layer is Class A fireproof glass wool, rock wool board, phenolic insulation board, EPS polystyrene board, or X1PS extruded board.
[0010] Furthermore, the sound insulation material layer is a damping sound insulation felt, an electronically cross-linked polyethylene vibration damping and sound insulation pad, or a polyurethane rubber vibration damping and sound insulation pad.
[0011] Furthermore, the base plate layer is disposed below the insulation material layer, and the base plate layer is an asbestos-free calcium silicate board, fiber cement board, or high-density magnesium oxide board.
[0012] Furthermore, the base plate is also provided with a number of self-tapping screws, which pass through the base plate to the top of the profiled steel sheet in sequence, and extend beyond the profiled steel sheet by a length greater than or equal to 8mm.
[0013] Furthermore, the bottom plate layer has symmetrical inverted V-shaped oblique openings on both sides.
[0014] Furthermore, the steel truss is arranged in three parallel groups.
[0015] This utility model reduces construction steps through a composite layer structure consisting of profiled steel sheet, sound insulation material layer, thermal insulation material layer, and base plate layer. Because it eliminates the need to remove formwork, it saves time and costs. The sound insulation and thermal insulation material layers enhance building comfort and meet energy conservation and environmental protection requirements. The design of the steel truss accelerates construction and improves the stability of the overall structure. The steel truss is welded to profiled steel sheets, which are galvanized steel sheets with a micro-wave cross-section formed along the width direction after cold bending. Male and female grooves on the sides of the sheets facilitate the overlapping of the sheets and prevent grout leakage during concrete pouring. Self-tapping screws are used to penetrate from the bottom layer to the top of the profiled steel sheet, extending beyond the sheet by a certain length. After concrete is laid inside the steel truss, the self-tapping screws can be embedded in the concrete, bonding tightly with it and increasing their tensile strength, ensuring that the bottom layer will not detach. Angled openings are provided on both sides of the bottom layer, and the two sets of fiber cement boards are spliced together in an inverted V-shape. Then, fiberglass mesh and adhesive mortar are used for plastering, which strengthens the joint and prevents the plaster mortar from cracking due to vibration during finishing. Attached Figure Description
[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0017] Fig. 1 This is a first schematic diagram of the overall structure of this utility model;
[0018] Fig. 2 This is a second schematic diagram of the overall structure of this utility model;
[0019] Fig. 3 This is a side view of the present invention;
[0020] Fig. 4 This is a front view of the present invention.
[0021] In the diagram: 1. Steel truss; 2. Corrugated steel sheet; 21. Male groove; 22. Female groove; 3. Sound insulation material layer; 4. Thermal insulation material layer; 11. Top chord reinforcement; 12. Bottom chord reinforcement; 13. Web reinforcement; 14. Support vertical reinforcement; 15. Support horizontal reinforcement; 16. Bend; 5. Bottom slab layer; 6. Self-tapping screw. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figs. 1 to 4 The technical solution provided by this utility model is as follows: a prefabricated, non-removable composite bottom formwork insulated and soundproof floor deck, which is formed by a three-dimensionally arranged steel truss 1 connected to the non-removable composite bottom formwork by resistance spot welding. The steel truss 1 bears the construction load during the construction phase and serves as structural reinforcing steel during the service phase; the non-removable composite bottom formwork serves as a concrete pouring platform during the construction phase and as the bottom layer of the floor slab during the service phase.
[0024] In this implementation, the non-removable composite bottom formwork includes a profiled steel sheet 2, a sound insulation material layer 3, a thermal insulation material layer 4, and a bottom plate layer 5. Three sets of equally spaced steel trusses 1 are welded onto the profiled steel sheet 2. Each set of steel trusses 1 includes an upper chord bar 11, a lower chord bar 12, web bars 13, and support bars connected to the ends of the upper chord bar 11 and the lower chord bar 12. The upper chord bar 11 and the lower chord bar 12 are arranged in parallel vertically and have a triangular cross-section. The web bars 13 are welded to the upper chord bar 11 and the lower chord bar 12, and the weld with the lower chord bar 12 has a bend 16. The bend 16 is welded to the profiled steel sheet 2. The support bars include support horizontal bars 15 welded to the lower chord bar 12, and support vertical bars 14 welded to the upper chord bar 11 and the support horizontal bars 15.
[0025] In this preferred embodiment, the profiled steel sheet 2 is placed above the insulation material layer 4, and is a galvanized steel sheet that has been cold-bent by roller pressing to form a micro-wave cross section along the width direction; the galvanized steel sheet has male grooves 21 and female grooves 22 on both sides for overlapping between the sheets to prevent grout leakage during concrete pouring;
[0026] The thickness of the profiled steel sheet 2 is between 0.4mm and 1.2mm, with 0.5mm being the most common thickness. The double-sided zinc content of the galvanized steel sheet is ≥120 g / m². The effective width of the galvanized steel sheet after pressing is between 565mm and 610mm, with 590mm and 600mm being the most common widths.
[0027] The insulation material layer 4 is a Class A fireproof glass wool, rock wool board, or phenolic insulation board with a density ≥80kg / m³ and a thickness ≥15mm. In this embodiment, Class A fireproof glass wool is used, which is generally 20mm or 30mm thick and has a density of 100kg / m³. For some buildings with low fire protection requirements, Class B fireproof and lightweight insulation boards, such as XPS extruded polystyrene boards or graphite EPS polystyrene insulation boards, can be used to reduce costs and increase efficiency.
[0028] Preferably, in this embodiment, the sound insulation material layer 3 is disposed above the thermal insulation material layer 4, between the thermal insulation material layer 4 and the profiled steel plate 2, and is any one of damping sound insulation felt, electronic cross-linked polyethylene vibration damping and sound insulation pad or polyurethane rubber vibration damping and sound insulation pad, with a thickness of 2mm to 15mm. In this embodiment, polyurethane rubber vibration damping and sound insulation pad is used, and the upper surface is uneven, which facilitates sound absorption and improves the sound insulation effect.
[0029] Preferably, the base plate layer 5 is located below the insulation material layer 4, and is made of asbestos-free calcium silicate board, fiber cement board, or high-density magnesium oxide board. The base plate layer 5 is also equipped with several self-tapping screws 6, which sequentially penetrate the base plate layer 5, insulation material layer 4, sound insulation material layer 3, and profiled steel sheet 2. The self-tapping screws 6 are austenitic or martensitic stainless steel cross-head countersunk self-tapping screws. The self-tapping screws 6 are located directly below the upper chord reinforcement of the steel truss 1, with 15 to 30 screws per square meter. The screw spacing parallel to the steel truss 1 is ≤2 times the truss section spacing, and the screw spacing perpendicular to the steel truss 1 is 200mm, with a length extending ≥8mm from the profiled steel sheet 2. The screws are fixed using a pre-drilled hole and then tail-drilled method. In this embodiment, the fiber cement board used in the base plate layer 5 is asbestos-free. After concrete is laid inside the steel truss 1, the self-tapping screws 6 can be embedded in the concrete, tightly bonded to the concrete, enhancing the tensile strength of the self-tapping screws 6 and ensuring that the fiber cement board will not fall off.
[0030] In this embodiment, the fiber cement board used in the bottom layer 5 has symmetrical oblique openings on both sides. When the two sets of fiber cement boards are spliced together, they form an inverted V-shaped joint. Then, 100mm to 200mm wide fiberglass mesh and adhesive mortar are used for plastering, which can strengthen the firmness of the joint and prevent the plaster mortar from cracking due to vibration during decoration.
[0031] This utility model achieves excellent sound insulation and thermal insulation performance by combining a multi-layer composite structure with a template-free design, which simplifies the construction process and reduces overall costs. The steel truss 1 and self-tapping screws 6 work together to enhance structural stability, and the innovative oblique opening joint process effectively prevents cracking, fully meeting the dual requirements of energy conservation, environmental protection and living comfort in new buildings.
[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A prefabricated, non-removable composite bottom formwork insulated and soundproof floor deck, characterized in that: include: The non-removable composite bottom formwork, and several sets of equally spaced steel trusses welded onto the non-removable composite bottom formwork (1). The non-removable composite bottom formwork includes a profiled steel sheet (2), a sound insulation material layer (3), a thermal insulation material layer (4), and a bottom plate layer (5); the sound insulation material layer (3) is set on either the upper or lower side of the thermal insulation material layer (4), the steel truss (1) is welded on the profiled steel sheet (2), the profiled steel sheet (2) is set above the thermal insulation material layer (4), the profiled steel sheet (2) is a galvanized steel sheet with a micro-wave cross section formed along the width direction after roll forming and cold bending, and the galvanized steel sheet has a male groove (21) and a female groove (22) on both sides respectively. The steel truss (1) includes an upper chord (11), a lower chord (12), web reinforcement (13), and support reinforcement connected to the ends of the upper chord (11) and the lower chord (12). The upper chord (11) and the lower chord (12) are arranged in parallel, with a triangular cross section. The web reinforcement (13) is welded to the upper chord (11) and the lower chord (12), and has a bend (16) at the weld with the lower chord (12). The bend (16) is welded to the profiled steel sheet (2). The support reinforcement includes a support transverse reinforcement (15) welded to the lower chord (12), and a support vertical reinforcement (14) welded to the upper chord (11) and the support transverse reinforcement (15).
2. The prefabricated, non-removable composite bottom formwork thermal insulation and soundproof floor decking according to claim 1, characterized in that: The insulation material layer (4) is Class A fireproof glass wool, rock wool board, phenolic insulation board, EPS polystyrene board or X1PS extruded board.
3. The prefabricated, non-removable composite bottom formwork thermal insulation and soundproof floor decking according to claim 1, characterized in that: The sound insulation material layer (3) is a damping sound insulation felt, an electronically cross-linked polyethylene damping and sound insulation pad, or a polyurethane rubber damping and sound insulation pad.
4. The prefabricated, non-removable composite bottom formwork thermal insulation and soundproof floor decking according to claim 1, characterized in that: The bottom plate layer (5) is located below the insulation material layer (4), and the bottom plate layer (5) is an asbestos-free calcium silicate board, fiber cement board or high-density magnesium oxide board.
5. The prefabricated, non-removable composite bottom formwork thermal insulation and soundproof floor decking according to claim 1, characterized in that: The base plate layer (5) is also provided with a number of self-tapping screws (6), which pass through the base plate layer (5) to the top of the profiled steel plate (2) and extend beyond the profiled steel plate (2) by more than 8 mm.
6. The prefabricated, non-removable composite bottom formwork thermal insulation and soundproof floor decking according to claim 1, characterized in that: The bottom plate layer (5) has symmetrical inverted V-shaped oblique openings on both sides.
7. The prefabricated, non-removable composite bottom formwork thermal insulation and soundproof floor decking according to claim 1, characterized in that, The steel truss (1) is provided in three parallel sets.