KR20200088053A - Fire Door for Heat Insulation and Heat Protection - Google Patents

Abstract

A conventional fire door consists of an inner plate (10) and an outer plate (20), and an inner space formed by the inner plate (10) and the outer plate (20) is filled with an insulating material (60). The present invention provides a fire door in which: the insulating material (60) consists of an intermediate layer (61) corresponding to the center thereof, and a pair of surface layers (62, 63) bonded to both surfaces of the intermediate layer (61); the intermediate layer (61) is a phenol foam sheet or a mineral wool sheet; and the surface layers (62, 63) are an inorganic fiber sheet having an inorganic binder layer formed by applying an inorganic binder solution to both surfaces thereof, or an inorganic fiber sheet obtained by immersing the inorganic fiber sheet in an inorganic binder solution and curing the same. The inorganic fiber sheet is made of ceramic wool, mineral wool, or glass fiber. A sodium silicate solution, a mixed solution of sodium silicate and silica sol, a mixed solution of a silane compound and silica sol, and the like can be preferably used as the inorganic binder solution. As a method for forming the inorganic binder layer by applying the inorganic binder solution to both surfaces of the surface layers (62, 63), a method for applying or spraying an inorganic binder solution onto the surface of an inorganic fiber sheet is used.

Description

Fire Door for Heat Insulation and Heat Protection

The present invention relates to a fire door that is installed in various buildings such as houses, apartments, office buildings, shopping malls. More specifically, the present invention prevents condensation occurring in the fire door inside the room by blocking heat, and prevents heat from entering the room during a fire, so that the inner or outer plate of the fire door does not swell, and as a result, the fire door is warped. It is about fire doors that are not transformed.

Fire doors are installed in various buildings such as houses, apartments, office buildings, and shopping malls in order to prepare for fire. The fire door is fixed with a steel door frame on the wall, and a fire door is installed using a hinge on the door frame. In the fire door, the inner plate and the outer plate of the steel material are combined to constitute the main body, and the interior is usually filled with heat insulating material to block heat in case of fire.

The insulation filled inside the fire door prevents condensation from appearing on the fire door inside the room by blocking the heat in the usual time. Condensation occurs severely during the winter season when the temperature difference between indoor and outdoor is large, and frequently occurs during the spring and summer season. In the event of a fire, the insulation filled inside the fire door serves to block flames and heat that can enter the room.

Most of the fire doors that have been installed and used so far have steel door frames fixed between the walls, and the fire doors and door frames are installed by hinges at the top and bottom. The fire door consists of an inner plate and an outer plate, and the inner plate and the outer plate are bent at both ends, and the bent portion of the outer plate enters the bent portion of the inner plate and is joined by a plurality of rivets. The heat shield packing is usually inserted between the inner plate and the bent portion of the outer plate, and a fixing member is inserted between the rivet and the outer plate bent portion, so that the outer plate, the heat shield packaging and the inner plate are fixed integrally. The space between the inner and outer plates is filled with insulation. Insulating materials used include non-combustible glass fiber or synthetic resin foam such as urethane foam.

In the utility model publication No. 2017-0001850, in a fire door including a front panel and a rear panel in the form of a square plate, a plate-shaped frame interposed between the second side portion of the front panel and the third side portion of the rear panel, the frame Disclosed is a thermal insulation unit for a fire door that includes an insulating pad attached to one surface and a sealing member that comes into contact with the door frame in the closed door.

Patent Publication No. 2017-0104201 is installed on a door frame, and is installed in a door body having an empty space therein, and accommodated in an empty space inside the door body, expands when the air is filled, fills the empty space, and insulates the inside. Disclosed is an air-filled door having excellent heat insulation and airtightness made of an air tube body forming a closed air layer.

In Patent No. 10-1792971, the front panel and rear panel of the fire door are completely insulated, and at the same time, they use a panel-coupling member that can be securely fixed by screwing. Disclosed is a fire door with enhanced heat dissipation function, which can prevent the door from twisting. In this patent, the fire door includes a first frame, a second frame, and an insulating spacer, the door includes a front panel, a rear panel, and an insulating space, and the panel coupling member includes a thermal expansion member inside the door. It is characterized by including.

In Patent Publication No. 2018-0016282, a first plate-shaped member, a second plate-shaped member disposed in an overlapping position when viewed from the plate thickness direction with respect to the first plate-shaped member, disposed between the first plate-shaped member and the second plate-shaped member An intermediate member, a first insulating member disposed between the first plate-shaped member and the intermediate member, a second insulating member disposed between the second plate-shaped member and the intermediate member, and disposed through the first insulating material, the first plate-shaped member and the Disclosed is a fire door made of a first connecting member connecting an intermediate member, and a second connecting member connecting the intermediate member with a second plate-like member disposed to penetrate the second heat insulating material.

The preceding patents tried to improve the thermal barrier effect by improving the structure of the fire door, but the structural improvement as described above cannot block high heat generated in the event of a fire. In order to solve the drawbacks of the fire door according to the preceding patent, the present inventor expands the graphite layer 70 between the inner surface of the outer plate 20 and the heat insulating material 60 and between the inner surface of the inner plate 10 and the heat insulating material 60. A fire door that is characterized by forming a was developed and filed as a patent application No. 2018-57026 (filed May 18, 2018)

The fire door of the patent application exhibits excellent heat insulation and heat shielding effect by expanding the expanded graphite during a fire to form an air layer inside the fire door. However, when the temperature continues to rise due to the fire, if the temperature is continuously maintained at a high temperature of 900° C. or higher, the inner or outer plate of the heated fire door swells due to the expanded graphite layer, and as a result, the fire door is warped and deformed. Caused.

The present inventors in the conventional fire door filling the insulation 60 in the inner space formed by the inner plate 10 and the outer plate 20, a plurality of insulating sheets 60 in the space between the inner plate 10 and the outer plate 20 ), each of the heat insulating sheets is attached to the heat insulating thin film 62 on both surfaces of the heat insulating layer 61 so that convection occurs in each sheet, or the heat insulating thin film 62 from the heat insulating layer 61 from the outside. ) And developed and sealed the fire door, and filed it as patent application No. 2018-81591 (filed on July 3, 2018). This fire door solved the problem that the inner plate or the outer plate of the fire door did not swell, and the fire door was warped and deformed by fundamentally blocking heat during a fire. However, when the heat insulating material 60 is joined by a plurality of spacing members 80, the surface becomes uneven and a defect occurs that does not completely adhere to the inner surfaces of the inner plate 10 and the outer plate 20. In addition, glass fiber, ceramic wool, and mineral wool are used as the heat insulating material. When the surface layer of the heat insulating material 60 is glass fiber, the melting temperature of the glass fiber is about 650° C., and the glass fiber melts and flows at a temperature higher than this. This occurred. When the surface layer of the heat insulating material 60 is a ceramic wool or a mineral wool, the melting temperature is about 950°C and does not melt and flow in this range, but a needle punching is impossible and the defect is caused by being drooped under the load and thus no shape stability.

The inventor has reached the point of developing a new fire door of the present invention that can solve the above-mentioned drawbacks of the fire door of patent application No. 2018-81591.

An object of the present invention is to provide a fire door that can prevent the condensation phenomenon by having thermal insulation performance.

Another object of the present invention is to provide a fire door that can completely block high temperature heat in a fire by having heat protection performance.

Another object of the present invention is to provide a fire door that does not cause a problem that the inner plate or the outer plate of the fire door is deformed due to high temperature heat during a fire.

Another object of the present invention is to provide a sturdy fire door so as to prevent the thickness of the fire door and the built-in heat insulating material from being compressed and deformed from external pressure even in normal use.

Another object of the present invention is to provide a fire door in which the surface of the heat insulating material is flat like a plywood so that the heat insulating material is not deformed by being in close contact with the inner surfaces of the inner plate 10 and the outer plate 20.

Another object of the present invention is to provide a fire door that does not melt and flow even at a high temperature of about 950° C. or higher, in particular the surface layer of the heat insulating material.

Another object of the present invention is to provide a fire door in which the heat insulating material has shape stability by preventing each layer of the heat insulating material from sagging under load.

The above and other objects of the present invention can be achieved by the present invention described in detail below.

The fire door 100 having an insulation and heat dissipation function according to the present invention is made of an inner plate 10 and an outer plate 20, and is filled with an insulating material 60 in an inner space formed by the inner plate 10 and the outer plate 20. In the conventional fire door, the heat insulating material 60 is composed of an intermediate layer 61 corresponding to the center, and a pair of surface layers 62 and 63 bonded to both surfaces of the intermediate layer 61, the intermediate layer 61 ) Is a phenolic foam sheet or mineral wool sheet, and the surface layers 62 and 63 are inorganic binders of inorganic fiber sheets or inorganic fiber sheets formed by applying inorganic binder solutions on both surfaces. It is characterized by being an inorganic fiber sheet cured by immersion in a solution.

The intermediate layer 61 is a sheet having a thickness of about 20 to 40 mm, and the pair of surface layers 62 and 63 are sheets having a thickness of about 5 to 15 mm, respectively. Therefore, the entire thickness of the heat insulating material 60 has a thickness of about 30 to 70 mm.

The inorganic fiber sheet is made from ceramic wool, mineral wool or glass fibers.

The inorganic binder solution may be preferably a sodium silicate solution, a mixed solution of sodium silicate and silica sol, a mixed solution of silane compound and silica sol, and the like. Water may be further added to the mixed solution to be mixed. Preferred silane compounds are methyltrimethoxysilane (MTMS).

As a method of forming an inorganic binder layer by applying an inorganic binder solution to both surfaces of the surface layers 62 and 63, there is a method of applying or spraying (spraying) an inorganic binder solution on the surface of the inorganic fiber sheet.

The phenolic foam sheet or mineral wool sheet used as the intermediate layer 61 may have aluminum thin films (aluminum foil) adhered to both surfaces.

The surface layers 62 and 63 may be composed of two layers, respectively. That is, the surface layers 62 and 63 may be composed of two layers by bonding two inorganic fiber sheets cured by immersing them in an inorganic fiber sheet or an inorganic binder solution having inorganic binder layers formed on both surfaces.

Hereinafter, specific details of the present invention will be described in detail with reference to the accompanying drawings.

In the fire door of the present invention, the inorganic fiber sheet or inorganic in which the heat insulating material 60 is adhered to both surfaces of the intermediate layer 61 made of a phenolic foam sheet or mineral wool sheet, and the intermediate layer 61, and inorganic binder layers are formed on both surfaces. Consists of a pair of surface layers (62, 63) made of an inorganic fiber sheet cured by immersing in a binder solution, the intermediate layer (61) functions as a heat insulation, compressive strength, and condensation prevention, and the surface layers (62, 63) This has the effect of the invention to provide a fire door designed to have heat resistance above 950 ℃.

1 is a schematic cross-sectional view of a fire door showing a fire door structure according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a fire door showing a fire door structure according to another embodiment of the present invention, wherein the surface layers 62 and 63 of the heat insulating material 60 are each composed of two layers.

The present invention relates to fire doors installed in various buildings such as houses, apartments, office buildings, shopping malls, etc., to block heat to prevent condensation occurring in the fire doors inside, and to prevent heat from entering the room during a fire. Therefore, it relates to a fire door that is not deformed because the inner or outer plate of the fire door is distorted.

The fire door 100 is made of an inner plate 10 and an outer plate 20, as shown in FIG. 1, and the inner plate 10 and the outer plate 20 are bent at both ends, so that the bending portion of the outer plate 20 is an inner plate ( 10) into the bent portion of the rivet 50 is coupled. Between the inner plate 10 and the bent portion of the outer plate 20, a heat shield packing 30 is usually inserted, and a fixing member 40 is inserted and fixed between the rivet 50 and the bent portion of the outer plate 20. Inside the fire door, that is, the space between the inner plate 10 and the outer plate 20 is filled with a heat insulating material (60). After filling the insulation 60, the inner plate 10 and the outer plate 20 are assembled with rivets.

1 is a schematic cross-sectional view of a fire door showing a fire door structure according to an embodiment of the present invention.

As shown in FIG. 1, the fire door 100 according to one embodiment of the present invention has an intermediate layer 61 in which a heat insulating material 60 filling the inner space between the inner plate 10 and the outer plate 20 corresponds to the central portion , And a pair of surface layers 62 and 63 adhered to both surfaces of the intermediate layer 61, wherein the intermediate layer 61 is a phenol foam sheet or mineral wool sheet, and the surface layer (62, 63) is characterized in that the inorganic fiber sheet is formed by applying an inorganic binder solution on both surfaces and curing the inorganic fiber sheet or inorganic fiber sheet formed with an inorganic binder layer by immersing it in an inorganic binder solution.

The intermediate layer 61 is a sheet having a thickness of about 20 to 40 m, and the pair of surface layers 62 and 63 are sheets having a thickness of about 5 to 15 mm, respectively. Therefore, the entire thickness of the heat insulating material 60 has a thickness of about 30 to 70 mm.

The phenolic foam sheet or mineral wool sheet forming the intermediate layer 61 in the heat insulator 60 of the present invention has a heat insulating effect to block heat transmitted through the fire door in case of fire, and is sufficient to maintain the shape without the heat insulating material being struck downward. It is used to show the compressive strength and the effect of preventing condensation occurring inside the fire door.

The phenolic foam has a thermal conductivity of 0.022, a compressive strength of 31.0 N/m ² , a heat resistance temperature of 480° C., a mineral wool has a thermal conductivity of 0.038, a compressive strength of 25.0 N/m ² , and a heat resistance temperature of 600° C. In order for the fire door to meet legal requirements, it must be free of burning or deformation when exposed to high temperatures of 950°C or higher for at least 30 minutes. The phenolic foam sheet or mineral wool sheet forming the intermediate layer 61 has a heat resistance of 480°C and 600°C, which is lower than 950°C, but the surface layers 62 and 63 made of an inorganic fiber sheet are adhered to both sides. Therefore, it can exhibit the effect of heat insulation, compressive strength, and prevention of condensation.

The pair of surface layers 62 and 63, which are adhered to both surfaces of the intermediate layer 61, apply an inorganic binder solution to both surfaces of the inorganic fiber sheet to form an inorganic binder layer or immerse the inorganic fiber sheet in the inorganic binder solution. An inorganic fiber sheet cured by curing is used.

The inorganic fiber sheet is made from ceramic wool, mineral wool or glass fibers. Ceramic wool has a heat-resistant temperature of 1,100℃, and mineral wool and glass fibers are 600℃. Ceramic wool has a sufficient heat-resistant temperature, but since the heat-resistant temperature of mineral wool and glass fiber is lower than 950°C, it must be treated with an inorganic binder solution to reinforce heat resistance.

The inorganic binder solution may be preferably a sodium silicate solution, a mixed solution of sodium silicate and silica sol, a mixed solution of silane compound and silica sol, and the like. Water may be further added to the mixed solution to be mixed. The mixing ratio of these mixed solutions can be easily carried out by those skilled in the art to which the present invention pertains. Preferred silane compounds are methyltrimethoxysilane (MTMS).

The sodium silicate solution and the silane compound have a heat resistance of 750° C., but are combined with an inorganic fiber sheet to increase the heat resistance. Silica sol has a sufficient heat resistance with a heat resistance of 1,000°C or higher, but the adhesive force tends to be weakened. In the mixed solution, sodium silicate (or silane compound) to silica sol is used in a ratio of 100:5 to 100.

By treating the inorganic fiber sheet made from ceramic wool, mineral wool or glass fiber with an inorganic binder solution, a fire door that is not burned or deformed for more than 30 minutes at a high temperature of 950° C. or higher during a fire can be manufactured.

As a method of treating the inorganic fiber sheet with an inorganic binder solution, there is a method of applying or spraying (spraying) an inorganic binder solution on both surfaces of the inorganic fiber sheet. The applied or sprayed (sprayed) inorganic binder solution is cured to form an inorganic binder layer that maintains a solid shape. Another method of treating the inorganic fiber sheet with an inorganic binder solution is to cure the inorganic fiber sheet by immersing it in an inorganic binder solution. The inorganic fiber sheet impregnated with the inorganic binder solution is firmly cured to maintain a solid sheet shape. When the inorganic fiber sheet is treated with an inorganic binder solution, it is adhered to the intermediate layer 61, phenolic foam sheet or mineral wool sheet, before the inorganic binder solution is cured. The intermediate layer 61 may be divided into two layers. An inorganic binder solution is applied between the two layers to form a convective moving film.

The phenolic foam sheet or mineral wool sheet used as the intermediate layer 61 may have aluminum thin films (aluminum foil) adhered to both surfaces.

The surface layers 62 and 63 may be composed of two layers, respectively. That is, the surface layers 62 and 63 may be composed of two layers by bonding two inorganic fiber sheets cured by immersing them in an inorganic fiber sheet or an inorganic binder solution having inorganic binder layers formed on both surfaces.

2 is a schematic cross-sectional view of a fire door showing a fire door structure according to another embodiment of the present invention, wherein the surface layers 62 and 63 of the heat insulator 60 are each composed of two layers.

The surface layer 62 is formed by bonding two inorganic fiber sheets 62a and 62b, and the surface layer 63 is formed by bonding two inorganic fiber sheets 63a and 63b. In this case, the intermediate layer 61 has a thickness of about 20 to 40 mm, and the surface layers 62a, 62b, 63a, and 63b each have a thickness of about 5 mm. The entire thickness of the heat insulating material 60 will have a thickness of about 40-60 mm.

As in the present invention, when the insulating sheet is stacked in a multi-layer structure, it is possible to improve heat shielding and heat dissipation effects by making thermal conductivity difficult. Heat is transferred by conduction, radiation, and convection, of which convection moves rapidly as the temperature rises. At this time, blocking the flow of convection slows the movement of heat, thereby improving the insulation effect. The multi-layer structure of the heat insulating sheet of the present invention is to block the thermal conduction by convection. That is, by forming a closed structure for each heat insulating sheet, heat conduction by convection in each heat insulating sheet is blocked, and heat conduction to adjacent heat insulating sheets is blocked.

The present invention by forming the intermediate layer 61 having an insulating effect due to the multi-layer structure, as well as an insulating effect, sufficient compressive strength and anti-condensation effect, and by forming surface layers 62 and 63 having heat resistance on both surfaces of the intermediate layer, the present invention The effect of the invention can be achieved.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

Claims (9)

In the conventional fire door made of the inner plate 10 and the outer plate 20, the inner space formed by the inner plate 10 and the outer plate 20 is filled with a heat insulating material 60,
An intermediate layer 61 in which the heat insulating material 60 corresponds to a central portion; And
A pair of surface layers 62 and 63 adhered to both surfaces of the intermediate layer 61;
Is made of,
The intermediate layer 61 is a phenol foam (phenol foam) sheet (sheet) or mineral wool sheet, the surface layer (62, 63) has an insulating and heat dissipation function, characterized in that the inorganic fiber sheet treated with an inorganic binder solution Fire door (100).
The method of claim 1, wherein the inorganic fiber sheet is an inorganic fiber sheet formed by applying or spraying an inorganic binder solution on both surfaces, or an inorganic fiber sheet formed with an inorganic binder layer, or an inorganic fiber sheet cured by immersing the inorganic fiber sheet in an inorganic binder solution. Fire door (100) having a heat insulation and heat radiation function.
The method according to claim 1 or 2, wherein the intermediate layer (61) is a sheet having a thickness of 20 to 40 mm, and the pair of surface layers (62, 63) are sheets having a thickness of 5 to 15 mm, respectively, The total thickness of the heat insulating material 60 is a fire door 100 having a heat insulating and heat dissipation function, characterized in that it has a thickness of 30 to 70 mm.
The fire door (100) according to claim 3, wherein the inorganic fiber sheet is made of ceramic wool, mineral wool or glass fiber.
The method of claim 4, wherein the inorganic binder solution is a sodium silicate (sodium silicate) solution, a mixture of sodium silicate and silica sol, or a mixture of silane compound and silica sol fire door having heat and heat dissipation function ( 100).
The fire door (100) according to claim 5, wherein water is added to the mixed solution and mixed.
The fire door (100) according to claim 5, wherein the silane compound is methyltrimethoxysilane (MTMS).
The fire door (100) according to claim 1, wherein the phenolic foam sheet or the mineral wool sheet further adheres aluminum thin films (aluminum foil) to both surfaces.
The fire door (100) according to claim 1, wherein the surface layer (62, 63) is composed of two layers (62a and 62b; 63a and 63b), respectively.

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