CN210948359U

CN210948359U - Fireproof door structure with light weight and high fireproof level

Info

Publication number: CN210948359U
Application number: CN201921370608.8U
Authority: CN
Inventors: 付少东
Original assignee: Dongguan Deman Wood Co ltd
Current assignee: Dongguan Deman Wood Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-07-07
Anticipated expiration: 2029-08-22

Abstract

The utility model provides a fireproof door structure with light weight and high fireproof grade, which comprises a door edge in a shape like a Chinese character 'ri' and a door core hermetically fixed on an inner frame of the door edge through graphite glue; the door slit comprises a hardwood layer in the middle and first flame-retardant plywood layers attached to the surfaces of two sides of the hardwood layer in the thickness direction; the door core includes magnesium oxide door core board and laminate in the fire-retardant laminated board layer of second on magnesium oxide door core board surface, the surface parallel and level of first fire-retardant laminated board layer and the fire-retardant laminated board layer of second still including pasting the panel layer of locating door slit and door core's both sides surface. The fireproof door of this scheme is firm in structure reliable, fire behavior is stronger, and uses for a long time and does not have the collapse to because splint quantity is few makes fireproof door's quality lighter on the contrary.

Description

Fireproof door structure with light weight and high fireproof level

Technical Field

The utility model relates to a prevent fire door technical field, specifically indicate a fire door structure is prevented that matter is light and fire-protection level is high.

Background

Current fire prevention timber can set up the fire door core usually, however in order to reach the thickness that prevents the fire door requirement, can set up first layer splint at the both sides surface of fire door core usually, then sets up the spaced splint support bar on the surface of first layer splint, sets up second layer splint on the surface of splint support bar again, forms hollow layer in order to reach the fire door thickness that prevents the requirement, also helps reducing the weight of preventing fire door simultaneously. But the fire door core of this kind of timber is thinner, and fire-proof rating is lower, and in addition, the hollow layer lacks the support nature, and long-time back of using, the second floor splint can form in the interval department of splint support bar and cave in, seriously influences fire door quality.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a matter is light and fire-proof grade is high prevents fire door structure.

In order to achieve the above object, the utility model adopts the following technical scheme:

a fireproof door structure with light weight and high fireproof level comprises a U-shaped door edge and a door core hermetically fixed on an inner frame of the door edge through graphite glue; the door slit comprises a hardwood layer in the middle and first flame-retardant plywood layers attached to the surfaces of two sides of the hardwood layer in the thickness direction; the door core includes magnesium oxide door core board and laminate in the fire-retardant laminated board layer of second on magnesium oxide door core board surface, the surface parallel and level of first fire-retardant laminated board layer and the fire-retardant laminated board layer of second still including pasting the panel layer of locating door slit and door core's both sides surface.

Further, the panel layer comprises a fireproof inner layer and a density board outer layer.

Furthermore, the outer layer of the density board also comprises an inner bottom layer and an outer decorative surface layer.

Furthermore, the side all around of door gap still has the banding of fire-retardant splint material, the banding with panel layer forms closed cavity.

Further, the door edge is also provided with steel nails which are arranged at intervals and in a staggered manner and penetrate through the thickness direction.

The beneficial effects are that: the hardwood layer and the first flame-retardant sandwich layer make door slit have stronger support strength and have the fire prevention fire retardance, and sealed isolated through graphite cement between door core and the door slit, and the door core has thicker magnesium oxide door core board and the surface has the flame-retardant sandwich layer of second, and the flame-retardant sandwich layer of second still sets up for the laminating with the panel layer, compare current fire door that prevents fire with hollow layer, the fire door intensity of this scheme is high, fire behavior is stronger and long-time use does not have the collapse, and because the splint quantity is few make on the contrary the quality of preventing fire door lighter.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Figure 1 is a schematic view of the overall structure of a fire rated door in an embodiment;

figure 2 is a schematic sectional view of the fire door in the embodiment along the height direction;

figure 3 is a schematic view of an example of an interior layered structure of a fire rated door.

Wherein: 1. binding the door; 11. a hardwood layer; 12. a first flame retardant interlayer layer; 2. a door core; 21. a magnesium oxide door core panel; 22. a second flame retardant laminated layer; 3. a panel layer; 31. a fire resistant inner layer; 32. an outer layer of density board; 321. priming a bottom layer; 322. decorating the surface layer; 4. sealing edges; 5. graphite glue; 6. and (5) steel nails.

Detailed Description

The invention is further explained below with reference to the drawings:

referring to fig. 1 to 3, a lightweight high-fire-rating fire door structure includes a japanese-type door slit 1 and a door core 2 sealingly fixed to an inner frame of the door slit 1 by a graphite adhesive 5; the door slit 1 comprises a hardwood layer 11 in the middle and first flame-retardant plywood layers 12 attached to two side surfaces of the hardwood layer 11 in the thickness direction; door core 2 include magnesium oxide door core 21 board and laminate in the fire-retardant laminated sheet layer 22 of second on magnesium oxide door core 21 board surface, the surface parallel and level of first fire-retardant laminated sheet layer 12 and the fire-retardant laminated sheet layer 22 of second still including pasting the panel layer 3 of locating door gap 1 and door core 2's both sides surface. The hardwood layer 11 is a hardwood jointed board, so that the strength is high, and the door and window hardware is firmer and more reliable when being installed; and first fire-retardant sandwich panel layer 12 and graphite adhesive 5 form the surrounding structure to this hardwood layer 11, make door tie 1 have stronger support strength and have the fire prevention fire retardance, it is sealed isolated and fixed through graphite adhesive 5 between door core 2 and the door tie 1, door core 2 has thicker magnesium oxide door core board 21 board and the surface has the fire-retardant sandwich panel layer 22 of second, and the fire-retardant sandwich panel layer 22 of second still sets up for the laminating with panel layer 3, compare current fire-proof fire door that has hollow layer, the fire door intensity of this embodiment is high, fire behavior is strong, long-time use does not have the collapse, and because the splint quantity is few make the quality of fire door lighter on the contrary.

Further, the panel layer 3 includes a fire-resistant inner layer 31, and a density board outer layer 32. The fire-retardant inner layer 31 makes the fire-retardant property of the fire door stronger.

Further, the density board outer layer 32 further includes an inner bottom layer 321 and an outer decorative surface layer 322.

Further, the side edges around the door slit 1 are provided with sealing edges 4 made of flame-retardant splint materials, and the sealing edges 4 and the panel layer 3 form a closed cavity. The fireproof performance is stronger.

Further, the door tie 1 is also provided with steel nails 6 which are arranged at intervals and in a staggered manner and penetrate through the thickness direction. The strength of each layer of the door slit 1 and the bonding strength of the panel layer 3 and the door slit 1 are enhanced.

The above description is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a matter is light and fire-resistant grade is high prevents fire door structure which characterized in that: the split type combined door comprises a U-shaped door slit and a door core hermetically fixed on an inner frame of the door slit through graphite glue; the door slit comprises a hardwood layer in the middle and first flame-retardant plywood layers attached to the surfaces of two sides of the hardwood layer in the thickness direction; the door core includes magnesium oxide door core board and laminate in the fire-retardant laminated board layer of second on magnesium oxide door core board surface, the surface parallel and level of first fire-retardant laminated board layer and the fire-retardant laminated board layer of second still including pasting the panel layer of locating door slit and door core's both sides surface.

2. A lightweight high fire rated door construction in accordance with claim 1, further comprising: the panel layer comprises a fireproof inner layer and a density board outer layer.

3. A lightweight high fire rated door construction in accordance with claim 2, further comprising: the outer layer of the density board also comprises a bottom layer at the inner side and a decorative surface layer at the outer side.

4. A lightweight high fire rated door construction in accordance with claim 1, further comprising: the side edges at the periphery of the door edge are also provided with edge seals made of flame-retardant splint materials, and the edge seals and the panel layer form a closed cavity.

5. A lightweight high fire rated door construction in accordance with claim 1, further comprising: the door binding is also provided with steel nails which are arranged at intervals and are arranged in a staggered manner in the thickness direction in a penetrating manner.