Fireproof metal-faced rigid polyurethane sandwich panel

Abstract

The utility model relates to building material technical field, concretely is a kind of metal face hard polyurethane sandwich panel with strong fire resistance, the sandwich panel body includes fireproof color-coated metal panel, fire-retardant adhesive layer, fire-retardant hard polyurethane core material, fireproof isolation layer and inner layer fireproof metal panel from top to bottom in order, the periphery of fireproof color-coated metal panel is fixedly set first rectangular frame, the periphery of inner layer fireproof metal panel is fixedly set second rectangular frame, fireproof color-coated metal panel and inner layer fireproof metal panel form inside and outside double barrier, can directly resist open fire and high temperature invasion;Fire-retardant adhesive layer forms carbonized layer under high temperature, blocks heat transfer to core material, avoids interlayer peeling, satisfies high-grade fireproof requirement.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, specifically to a metal-faced rigid polyurethane sandwich panel with strong fire resistance. Background Technology

[0002] Metal-faced rigid polyurethane sandwich panels are widely used in building exteriors, industrial plants, and other applications due to their excellent thermal insulation and easy installation. However, existing products have significant fire resistance shortcomings: the polyurethane core material is flammable, releases toxic gases and produces drippings when burning, which can easily exacerbate the spread of fire; most products only apply a basic fire-retardant coating to the outer metal panel, and the core material and panel are prone to delamination and detachment at high temperatures, resulting in short fire resistance and difficulty in meeting fire protection requirements.

[0003] As fire safety requirements in high-rise buildings, data centers, and hazardous chemical warehouses increase, the contradiction of existing sandwich panels being "strong in insulation but weak in fire resistance" becomes prominent. A multi-layered, collaborative fire-resistant structure is needed to achieve strong fire resistance effects such as flame blocking, smoke suppression, and high-temperature stratification while retaining insulation performance. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a metal-faced rigid polyurethane sandwich panel with strong fire resistance.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a fire-resistant metal-faced rigid polyurethane sandwich panel, comprising a sandwich panel body, wherein the sandwich panel body comprises, from top to bottom, a fire-resistant color-coated metal panel, a flame-retardant adhesive layer, a flame-retardant rigid polyurethane core material, a fire-resistant isolation layer, and an inner fire-resistant metal panel, wherein a first rectangular frame is fixedly arranged on the periphery of the fire-resistant color-coated metal panel, and a second rectangular frame is fixedly arranged on the periphery of the inner fire-resistant metal panel, wherein the flame-retardant adhesive layer, the flame-retardant rigid polyurethane core material, and the fire-resistant isolation layer are all located inside the first rectangular frame and the second rectangular frame;

[0008] The lower surface of the first rectangular frame is bonded and fixed to the upper surface of the second rectangular frame. Multiple positioning blocks are provided at the four corners of the upper end of the second rectangular frame, and multiple positioning holes are provided at the four corners of the lower end of the first rectangular frame. The positioning blocks are inserted into the positioning holes.

[0009] To facilitate the splicing of multiple sandwich panel bodies, the present invention includes the following improvements: the sandwich panel body is a rectangular structure with four slots on its periphery, and a temporary mounting block is provided in the slot. The mounting block is tightly fitted to the inner wall of the slot and is bonded inside the slot. All of the positioning blocks are cylindrical structures and are tightly fitted to the inner wall of the positioning hole.

[0010] Further improvements to this invention include: the fireproof color-coated metal panel is made of galvanized steel sheet with a 20μm thick fireproof fluorocarbon coating; the flame-retardant adhesive layer is made of modified fireproof polyurethane adhesive; the flame-retardant rigid polyurethane core material contains a composite flame retardant of melamine cyanurate (MCA) and expandable graphite; the fireproof isolation layer is made of aerogel felt; and the inner fireproof metal panel, the first rectangular frame, and the second rectangular frame are all made of galvanized steel sheet with a 15μm thick fireproof epoxy resin coating.

[0011] Furthermore, the improvements of this utility model include that the thickness of the fireproof color-coated metal panel and the inner fireproof metal panel are both 0.5mm, the thickness of the flame-retardant adhesive layer is 20μm, the thickness of the flame-retardant rigid polyurethane core material is 20mm, and the thickness of the fireproof isolation layer is 10mm.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model provides a metal-faced rigid polyurethane sandwich panel with strong fire resistance, which has the following beneficial effects:

[0014] The fire-resistant color-coated metal panel and the inner fire-resistant metal panel form a double barrier that can directly resist open flames and high temperatures; the flame-retardant adhesive layer forms a carbonized layer at high temperatures, blocking heat transfer to the core material and preventing interlayer delamination.

[0015] The flame-retardant rigid polyurethane core material does not produce a large amount of toxic gas when burning, and the expandable graphite can form a dense carbon layer to inhibit the spread of fire. The fireproof isolation layer further blocks the penetration of flames. The five-layer structure solves the pain points of traditional sandwich panels being "flammable and toxic" from multiple dimensions such as "fire resistance, smoke suppression, and high temperature resistance", and meets high-level fire protection requirements. Attached Figure Description

[0016] Figure 1 This is an assembly drawing of the card block in this utility model;

[0017] Figure 2 This is a schematic diagram of the split structure of the sandwich panel body in this utility model;

[0018] Figure 3 This utility model Figure 2 A magnified schematic diagram of the local structure at point A;

[0019] Figure 4 This is a structural diagram of the positioning hole in this utility model;

[0020] In the diagram: 1. Fireproof color-coated metal panel; 2. Flame-retardant adhesive layer; 3. Flame-retardant rigid polyurethane core material; 4. Fireproof isolation layer; 5. Inner fireproof metal panel; 6. First rectangular frame; 7. Second rectangular frame; 8. Positioning block; 9. Positioning hole; 10. Sandwich panel body; 11. Slot; 12. Locking block. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4 This utility model discloses a fire-resistant metal-faced rigid polyurethane sandwich panel, comprising a sandwich panel body 10. The sandwich panel body 10 comprises, from top to bottom, a fire-resistant color-coated metal panel 1, a flame-retardant adhesive layer 2, a flame-retardant rigid polyurethane core material 3, a fire-resistant isolation layer 4, and an inner fire-resistant metal panel 5. A first rectangular frame 6 is fixedly arranged around the periphery of the fire-resistant color-coated metal panel 1, and a second rectangular frame 7 is fixedly arranged around the periphery of the inner fire-resistant metal panel 5. The flame-retardant adhesive layer 2, the flame-retardant rigid polyurethane core material 3, and the fire-resistant isolation layer 4 are all located inside the first rectangular frame 6 and the second rectangular frame 7.

[0023] The lower surface of the first rectangular frame 6 is bonded and fixed to the upper surface of the second rectangular frame 7. Multiple positioning blocks 8 are provided at the four corners of the upper end of the second rectangular frame 7, and multiple positioning holes 9 are provided at the four corners of the lower end of the first rectangular frame 6. The positioning blocks 8 are inserted into the positioning holes 9.

[0024] The fireproof color-coated metal panel 1 is made of galvanized steel sheet and coated with a 20μm thick fireproof fluorocarbon coating. The flame-retardant adhesive layer 2 is made of modified fireproof polyurethane adhesive. The flame-retardant rigid polyurethane core material 3 contains melamine cyanurate (MCA) and expandable graphite composite flame retardant. The fireproof isolation layer 4 is made of aerogel felt. The inner fireproof metal panel 5, the first rectangular frame 6 and the second rectangular frame 7 are all made of galvanized steel sheet and coated with a 15μm thick fireproof epoxy resin coating.

[0025] The thickness of the fireproof color-coated metal panel 1 and the inner fireproof metal panel 5 is 0.5mm, the thickness of the flame-retardant adhesive layer 2 is 20μm, the thickness of the flame-retardant rigid polyurethane core material 3 is 20mm, and the thickness of the fireproof isolation layer 4 is 10mm.

[0026] Parts pretreatment and frame assembly:

[0027] The sandwich panel body 10 has a rectangular structure and four slots 11 on its periphery. Each slot 11 has a temporary mounting block 12 (the block 12 can be a flame-retardant hollow metal block). The block 12 is tightly fitted to the inner wall of the slot 11 and is bonded to the inside of the slot 11. All of the positioning blocks 8 are cylindrical structures and are tightly fitted to the inner wall of the positioning hole 9.

[0028] First, fix the first rectangular frame 6 to the periphery of the fireproof colored metal panel 1, and fix the second rectangular frame 7 to the periphery of the inner fireproof metal panel 5, ensuring that the frame fits tightly against the edge of the panel; at the same time, confirm that the positioning blocks 8 at the four corners of the upper end of the second rectangular frame 7 and the positioning holes 9 at the four corners of the lower end of the first rectangular frame 6 are in accurate position, in preparation for subsequent assembly.

[0029] Frame positioning and fixation:

[0030] Align the positioning block 8 on the second rectangular frame 7 with the positioning hole 9 on the first rectangular frame 6, so that the positioning block 8 is tightly inserted into the positioning hole 9, and the two frames are initially aligned; then the lower surface of the first rectangular frame 6 is bonded and fixed to the upper surface of the second rectangular frame 7 to form the outer support structure of the sandwich panel, providing installation space for the middle layer components.

[0031] Intermediate fireproof and thermal insulation layer assembly:

[0032] A flame-retardant adhesive layer 2 is uniformly coated on the inner side of the fireproof colored metal panel 1 (the area surrounded by the first rectangular frame 6);

[0033] When the flame-retardant adhesive layer 2 is in a suitable adhesive state, the flame-retardant rigid polyurethane core material 3 is placed steadily on the flame-retardant adhesive layer 2, ensuring that the core material is completely inside the first and second rectangular frames 7; then, a fireproof isolation layer 4 is laid under the flame-retardant rigid polyurethane core material 3, and finally, the inner fireproof metal panel 5 with the second rectangular frame 7 is covered under the fireproof isolation layer 4, completing the core assembly of the sandwich panel body 10.

[0034] Multi-panel splicing assembly:

[0035] If multiple sandwich panel bodies 10 need to be used in combination, the card block 12 is tightly attached to the inner wall of the card slot 11 and bonded and fixed by using the card slot 11 pre-set on the periphery of the sandwich panel body 10.

[0036] By cooperating with the card block 12 and the card slot 11, temporary splicing of adjacent sandwich panels can be achieved, ensuring that there are no obvious gaps at the splicing point, forming a continuous fireproof and heat-insulating wall or roof structure.

[0037] The first rectangular frame 6 and the second rectangular frame 7 not only enhance the overall deformation resistance of the sandwich panel, but also provide circumferential restraint for the intermediate layer components to prevent core material displacement; the tight fit between the positioning block 8 and the positioning hole 9 ensures that there is no misalignment when the frame and the panel are assembled, avoiding fireproofing defects caused by assembly deviations.

[0038] The splicing design of the card block 12 and the card slot 11 allows for the combination of multiple panels without the need for complicated tools, reducing construction procedures. At the same time, the small splicing gaps further enhance the overall fire resistance integrity.

[0039] The flame-retardant rigid polyurethane core material retains excellent thermal insulation performance to meet building energy conservation requirements; all metal components (panels and frames) are made of galvanized steel sheets and coated with fire-retardant coatings, which are weather-resistant and corrosion-resistant, extending the service life of the panels; while ensuring strong fire resistance, it does not sacrifice ease of installation and thermal insulation effect, making it suitable for a variety of demanding scenarios.

[0040] Example of application scenarios:

[0041] Data center server room walls:

[0042] Data centers must simultaneously meet the requirements of "thermal insulation (maintaining constant equipment temperature)" and "strong fire protection (preventing fires caused by electrical faults)." The flame-retardant rigid polyurethane core material 3 of this sandwich panel stabilizes the room temperature, while its multi-layered fire-resistant structure quickly blocks flames and toxic gases, preventing fire damage to server equipment, ensuring data storage security, and meeting the stringent dual standards of fire prevention and energy conservation required by data centers.

[0043] Exterior wall of hazardous chemical warehouse:

[0044] Hazardous chemical warehouses store flammable materials, and in the event of a fire, it is necessary to quickly contain the fire and reduce the release of toxic fumes. The fire-resistant color-coated metal panel 1 of this sandwich panel can resist external open flames, the fireproof isolation layer 4 blocks the penetration of flames, and the flame-retardant core material does not produce a large amount of toxic gases, which can reduce the harm of fire to the surrounding environment and personnel. At the same time, the corrosion resistance of the frame and panel is also suitable for the humid or corrosive environment of the warehouse.

[0045] High-rise building exterior walls:

[0046] High-rise building fire rescue is challenging and demands high fire resistance from the walls. This sandwich panel's multi-layered fireproof system can slow the spread of fire, buying time for evacuation; at the same time, the core material's insulation performance meets high-rise building energy-saving standards, and the frame and panels' deformation resistance can adapt to the complex environment of high-rise buildings, such as wind pressure and temperature changes, balancing safety and practicality.

[0047] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A metal-faced rigid polyurethane sandwich panel having high fire resistance, comprising a sandwich panel body (10), characterized in that: The sandwich panel body (10) includes, from top to bottom, a fireproof color-coated metal panel (1), a flame-retardant adhesive layer (2), a flame-retardant rigid polyurethane core material (3), a fireproof isolation layer (4), and an inner fireproof metal panel (5). A first rectangular frame (6) is fixedly installed on the periphery of the fireproof color-coated metal panel (1), and a second rectangular frame (7) is fixedly installed on the periphery of the inner fireproof metal panel (5). The flame-retardant adhesive layer (2), the flame-retardant rigid polyurethane core material (3), and the fireproof isolation layer (4) are all located inside the first rectangular frame (6) and the second rectangular frame (7). The lower surface of the first rectangular frame (6) is bonded and fixed to the upper surface of the second rectangular frame (7). Multiple positioning blocks (8) are provided at the four corners of the upper end of the second rectangular frame (7), and multiple positioning holes (9) are provided at the four corners of the lower end of the first rectangular frame (6). The positioning blocks (8) are inserted into the positioning holes (9).

2. The metal-faced rigid polyurethane sandwich panel according to claim 1, characterized in that: The sandwich panel body (10) has a rectangular structure and four slots (11) are provided on its periphery. The slots (11) are provided with temporary mounting blocks (12).

3. The metal-faced rigid polyurethane sandwich panel according to claim 2, characterized in that: The card block (12) fits tightly against the inner wall of the card slot (11), and the card block (12) is bonded to the inside of the card slot (11).

4. The metal-faced rigid polyurethane sandwich panel according to claim 3, characterized in that: All of the positioning blocks (8) are cylindrical structures, and the positioning blocks (8) are in close contact with the inner wall of the positioning holes (9).

5. The metal-faced rigid polyurethane sandwich panel according to claim 4, characterized in that: The fireproof color-coated metal panel (1) is made of galvanized steel plate and coated with a 20μm thick fireproof fluorocarbon coating. The flame-retardant adhesive layer (2) is made of modified fireproof polyurethane adhesive. The flame-retardant rigid polyurethane core material (3) contains melamine cyanurate (MCA) and expandable graphite composite flame retardant. The fireproof isolation layer (4) is made of aerogel felt. The inner fireproof metal panel (5), the first rectangular frame (6) and the second rectangular frame (7) are all made of galvanized steel plate and coated with a 15μm thick fireproof epoxy resin coating.

6. The metal-faced rigid polyurethane sandwich panel according to claim 5, characterized in that: The thickness of the fireproof colored metal panel (1) and the inner fireproof metal panel (5) is 0.5 mm, the thickness of the flame-retardant adhesive layer (2) is 20 μm, the thickness of the flame-retardant rigid polyurethane core material (3) is 20 mm, and the thickness of the fireproof isolation layer (4) is 10 mm.

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