Multi-insulation structure of fireproof door

Abstract

This utility model discloses a multi-layer heat insulation structure for a fire door, including a core board; heat insulation layers are provided on both sides of the core board; a metal surface layer is provided on the surface of the heat insulation layer, and metal heat-conducting protrusions are provided on the inner side of the metal surface layer; mounting grooves are provided on the surface of the heat insulation layer opposite to the metal heat-conducting protrusions; a heat-insulating lining is provided on the inner wall of the mounting grooves; the metal heat-conducting protrusions extend upward and downward to the top and bottom of the heat insulation layer; heat dissipation seats are also provided at the top and bottom of the heat insulation layer; the heat dissipation seats are located on the side of the metal heat-conducting protrusions closer to the outside of the door; a heat insulation plate is provided on the side of the metal heat-conducting protrusions closer to the inside of the door. Several metal heat-conducting protrusions are used to absorb and transfer heat from the metal surface layer; wherein, the mounting grooves on the heat insulation layer used to receive the metal heat-conducting protrusions are covered with a heat-insulating lining, which can reduce the transfer of heat to the inside of the door, while the heat dissipation seats provided at the top and bottom of the heat insulation layer can be used to absorb heat from the metal heat-conducting protrusions.

Description

Technical Field

[0001] This utility model relates to a heat insulation structure, specifically a multi-layer heat insulation structure for a fire door, belonging to the technical field of door bodies, particularly fire doors. Background Technology

[0002] Existing fire doors primarily employ an external fire-resistant structure combined with internal filling materials to achieve fire resistance and heat insulation. This relies on the inherent properties of the materials themselves to insulate heat. This places significant demands on the materials, and their insulation capacity gradually decreases over time. Therefore, relying solely on material properties for heat insulation is insufficient. Chinese patent document CN210858452U discloses a fire door panel that enhances heat dissipation through structural improvements, thereby improving its heat insulation. However, it primarily achieves this through additional wind and water sources, a method with limited practical value. Traditional doors require not only adequate insulation but also robust structural strength. The aforementioned patent adds various functions within the door structure, reducing its overall integrity and compromising panel strength—a costly approach. Therefore, further improvements are needed. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a multi-layer heat insulation structure for fire doors. The structure is simple and reasonable, which can effectively improve heat dissipation capacity, ensure the structural strength of the door, and reduce the rate of temperature rise of the door.

[0004] A multi-layer heat insulation structure for a fire door includes a core board; heat insulation layers are provided on both sides of the core board; a metal surface layer is provided on the surface of the heat insulation layer, and a metal heat-conducting protrusion is provided on the inner side of the metal surface layer; an installation groove is provided on the surface of the heat insulation layer opposite to the metal heat-conducting protrusion; a heat-insulating lining is provided on the inner wall of the installation groove; the metal heat-conducting protrusion extends upward and downward to the top and bottom of the heat insulation layer; a heat dissipation seat is also provided at the top and bottom of the heat insulation layer; the heat dissipation seat is located on the side of the metal heat-conducting protrusion closer to the outside of the door; a heat insulation plate is provided on the side of the metal heat-conducting protrusion closer to the inside of the door.

[0005] Furthermore, the heat insulation layer is an aluminum silicate fiberboard; the core board is a perlite insulation board; the metal surface layer is a galvanized iron sheet; the metal heat-conducting protrusions are arranged longitudinally along the metal surface layer; the inner side of the metal surface layer has at least three metal heat-conducting protrusions; the metal heat-conducting protrusions are evenly distributed among each other.

[0006] Furthermore, the metal heat-conducting protrusion is made of steel or aluminum profile; the metal heat-conducting protrusion is connected to the metal surface layer by welding; the mounting groove is sized to match the metal heat-conducting protrusion; and the heat-insulating liner covers the three inner walls of the mounting groove.

[0007] Furthermore, the heat-insulating lining is made of rock wool material; the heat-insulating lining is in close contact with the metal heat-conducting protrusions.

[0008] Furthermore, the bottom or top of the heat sink is provided with an insertion hole relative to the end of the metal heat-conducting protrusion; the metal heat-conducting protrusion is provided with a screw hole; the direction of the screw hole is perpendicular to the axial direction of the metal heat-conducting protrusion; a through hole is provided on one side of the heat sink; the heat sink is locked to the metal heat-conducting protrusion by a screw; the other side of the heat sink is welded to the metal surface layer.

[0009] Furthermore, the heat sink has an inner cavity; several heat sink fins are horizontally arranged in the inner cavity; and several heat dissipation holes are also provided on the front side of the heat sink.

[0010] Furthermore, the heat insulation board is made of aerogel and glass fiber composite; the heat insulation board is fastened to the core board and the top and bottom of the heat insulation layer by screws, and is flush with the top or bottom of the inner metal surface layer.

[0011] This invention offers the following advantages: It employs several metal heat-conducting protrusions to absorb and transfer heat from the metal surface layer. The mounting grooves on the insulation layer that support the metal heat-conducting protrusions are covered with an insulating lining, reducing heat transfer into the door. Heat dissipation seats at the top and bottom of the insulation layer absorb heat from the metal heat-conducting protrusions. Simultaneously, the pressure difference created by the temperature difference between the inside and outside of the door generates a negative pressure outside, which adsorbs heat from the heat dissipation seats, thus absorbing heat from the metal heat-conducting protrusions and dissipating it outwards. Furthermore, on the other side of the metal heat-conducting protrusions (the side closer to the inside of the door), an insulation plate seals the gap between the top and bottom of the door panel, further preventing heat transfer inwards. Attached Figure Description

[0012] Figure 1 This is a front structural diagram of the present invention.

[0013] Figure 2 This is a side view of the present invention.

[0014] Figure 3 This is a top-view schematic diagram of the installation structure of the metal heat-conducting protrusion.

[0015] Wherein: 1 is the core board, 2 is the heat insulation layer, 2-1 is the mounting groove, 3 is the metal surface layer, 3-1 is the metal heat-conducting protrusion, 4 is the heat insulation lining, 5 is the heat sink, 5-1 is the heat sink fin, 5-2 is the heat dissipation hole, and 6 is the heat insulation board. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] See Figures 1-3 This application discloses a multi-layer heat insulation structure for a fire door, including a core board 1; heat insulation layers 2 are provided on both sides of the core board 1; a metal surface layer 3 is provided on the surface of the heat insulation layer 2, and a metal heat-conducting protrusion 3-1 is provided on the inner side of the metal surface layer 3; an installation groove 2-1 is provided on the surface of the heat insulation layer 2 opposite to the metal heat-conducting protrusion 3-1; a heat-insulating lining 4 is covered on the inner wall of the installation groove 2-1; the metal heat-conducting protrusion 3-1 extends upward and downward to the top and bottom of the heat insulation layer 2; a heat dissipation seat 5 is also provided at the top and bottom of the heat insulation layer 2; the heat dissipation seat 5 is located on the side of the metal heat-conducting protrusion 3-1 closer to the outside of the door; a heat insulation plate 6 is provided on the side of the metal heat-conducting protrusion 3-1 closer to the inside of the door.

[0018] Furthermore, the heat insulation layer 2 is an aluminum silicate fiberboard; the core board 1 is a perlite insulation board; the metal surface layer 3 is a galvanized iron sheet; the metal heat-conducting protrusions 3-1 are arranged longitudinally along the metal surface layer 3; the inner side of the metal surface layer 3 has at least three metal heat-conducting protrusions 3-1; the metal heat-conducting protrusions 3 are evenly distributed among each other.

[0019] Furthermore, the metal heat-conducting protrusion 3-1 is a steel profile or an aluminum profile; the metal heat-conducting protrusion 3-1 is connected to the metal surface layer 3 by welding; the mounting groove 2-1 is sized to match the metal heat-conducting protrusion 3-1; and the heat-insulating liner 4 covers the three inner walls of the mounting groove 2-1.

[0020] Furthermore, the heat insulation liner 4 is made of rock wool material; the heat insulation liner 4 is in close contact with the metal heat-conducting protrusion 3-1.

[0021] Furthermore, the bottom or top of the heat sink 5 is provided with an insertion hole relative to the end of the metal heat-conducting protrusion 3-1; the metal heat-conducting protrusion 3-1 is provided with a screw hole; the direction of the screw hole is perpendicular to the axial direction of the metal heat-conducting protrusion 3-1; a through hole is provided on one side of the heat sink 5; the heat sink 5 is locked to the metal heat-conducting protrusion 3-1 by screws; the other side of the heat sink 5 is welded to the metal surface layer 3.

[0022] Furthermore, the heat sink 5 has an inner cavity; several heat sinks 5-1 are horizontally arranged in the inner cavity; and several heat dissipation holes 5-2 are also provided on the front side of the heat sink 5.

[0023] Furthermore, the heat insulation board 6 is made of aerogel and glass fiber composite; the heat insulation board 6 is fastened to the top and bottom of the core board 1 and the heat insulation layer 2 by screws, and is flush with the top or bottom of the inner metal surface layer 3.

[0024] Working principle: The metal heat-conducting protrusion 3-1 absorbs heat from the metal surface layer 3 and transfers it to the lower heat positions at the top and bottom. When the metal heat-conducting protrusion 3-1 heats up, the heat entering the insulation layer 2 is reduced because the inner wall of the mounting groove 2-1 is covered with a heat-insulating lining 4. Simultaneously, when the top and bottom ends of the metal heat-conducting protrusion 3-1 heat up, the heat sink 5, being directly connected to it, also absorbs heat and heats up. Due to the temperature difference between the inside and outside of the door, a pressure difference is created. The negative pressure outside the door attracts heat from the heat sink 5, causing heat to transfer from the heat sink 5-1 outwards through the heat dissipation holes 5-2, thus achieving the effect of heat insulation.

[0025] On the other side of the metal heat-conducting protrusion 3-1, a heat insulation board made of aerogel and glass fiber composite is used inside the door for temperature insulation.

[0026] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A multi-layer heat insulation structure for a fire door, comprising a core board (1); heat insulation layers (2) are provided on both sides of the core board (1); a metal surface layer (3) is provided on the surface of the heat insulation layers (2), characterized in that: The inner side of the metal surface layer (3) is provided with a metal heat-conducting protrusion (3-1); the surface of the heat insulation layer (2) is provided with an installation groove (2-1) opposite to the metal heat-conducting protrusion (3-1); the inner wall of the installation groove (2-1) is covered with a heat-insulating lining (4); the metal heat-conducting protrusion (3-1) extends upward and downward to the top and bottom of the heat insulation layer (2); the top and bottom of the heat insulation layer (2) are also provided with heat dissipation seats (5); the heat dissipation seats (5) are located on the side of the metal heat-conducting protrusion (3-1) closer to the outside of the door; the side of the metal heat-conducting protrusion (3-1) closer to the inside of the door is provided with a heat insulation plate (6).

2. The multi-insulation structure of a fire door according to claim 1, wherein: The heat insulation layer (2) is aluminum silicate fiberboard; the core board (1) is perlite insulation board; the metal surface layer (3) is galvanized iron sheet; the metal heat-conducting protrusions (3-1) are arranged along the longitudinal direction of the metal surface layer (3); the inner side of the metal surface layer (3) has at least three metal heat-conducting protrusions (3-1); the metal heat-conducting protrusions (3-1) are evenly distributed among each other.

3. The multi-insulation structure of a fire door according to claim 2, wherein: The metal heat-conducting protrusion (3-1) is a steel profile or an aluminum profile; the metal heat-conducting protrusion (3-1) is connected to the metal surface layer (3) by welding; the mounting groove (2-1) is matched with the size of the metal heat-conducting protrusion (3-1); the heat-insulating liner (4) covers the three inner walls of the mounting groove (2-1).

4. The multi-insulation structure of a fire door according to claim 3, wherein: The heat insulation lining (4) is made of rock wool material; the heat insulation lining (4) is in close contact with the metal heat-conducting protrusion (3-1).

5. The multi-insulation structure of a fire door according to claim 4, wherein: The bottom or top of the heat sink (5) is provided with an insertion hole relative to the end of the metal heat-conducting protrusion (3-1); the metal heat-conducting protrusion (3-1) is provided with a screw hole; the direction of the screw hole is perpendicular to the axial direction of the metal heat-conducting protrusion (3-1); a through hole is provided on one side of the heat sink (5); the heat sink (5) is locked to the metal heat-conducting protrusion (3-1) by screws; the other side of the heat sink (5) is welded to the metal surface layer (3).

6. The multi-insulation structure of a fire door according to claim 5, wherein: The heat sink (5) has an inner cavity; several heat sinks (5-1) are horizontally arranged in the inner cavity; several heat dissipation holes (5-2) are also provided on the front side of the heat sink (5).

7. The multi-layer heat insulation structure of a fire door according to claim 6, characterized in that: The heat insulation board (6) is made of aerogel and glass fiber composite; the heat insulation board (6) is fastened to the top and bottom of the core board (1) and the heat insulation layer (2) by screws, and is flush with the top or bottom of the inner metal surface layer (3).

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