A new water hammer resistant fire door structure

Abstract

The utility model relates to a novel water shock resistance fireproof door structure, include: door leaf and door pocket, door leaf and door pocket connect, door leaf includes the door core layer, first glass magnesium fireproof plate and medium fiberboard that set gradually from inside to outside, and door pocket includes core layer, fireproof layer and medium fiberboard gradually from inside to outside, and the core layer is composed of flame -retardant integrated material, and the fireproof layer is composed of glass magnesium fireproof plate, the utility model has the advantages that: the door leaf is equipped with the skeleton that uses flame -retardant integrated material horizontal and longitudinal splicing, and the skeleton stability is good, the door core board is filled in the skeleton, has reduced the size of door core board, has reduced the impact force of water shock impact whole core board, has guaranteed the integrity of core board, the door leaf positive and negative two sides set up 2 layers glass magnesium fireproof plate, guarantee interior core material and the integrity of the file after burning, the fire -resistant water shock resistance surface of door pocket increases high density glass magnesium fireproof plate, promotes the fire -resistant capacity, uses flame -retardant integrated material to do the door jamb material in the inside, guarantees the water shock resistance ability.

Description

Technical Field

[0001] This utility model relates to the field of wooden fire door production, and in particular includes a novel water-resistant fire door structure. Background Technology

[0002] Currently, with the increasing demands for building safety and fire resistance, fire doors, as important fire protection facilities, are gradually receiving widespread attention and popularity. Among them, wooden fire doors are increasingly being widely used in high-rise residential and commercial buildings due to their excellent heat insulation performance and decorative effect. The new national standard for fire doors, GB12955-2024, proposes water hammer resistance requirements after fire testing to meet higher safety needs, and puts forward higher requirements for fire door structures: (1) The door core not only needs to be fire-resistant, but also needs to have the ability to not pulverize after fire resistance, ensuring that the door leaf will not be perforated or collapse after water hammer. (2) The door leaf frame needs to be strengthened to improve fire resistance. The frame distribution improves the overall door leaf strength. The door core is divided into small pieces, which makes the water hammer resistance stronger. The front is increased with multi-layer glass magnesium fireproof board to improve fire resistance. (3) The fire test surface of the door frame has been changed. The original fire test surface has changed from the total thickness side to the door opening side, and the fire resistance and water hammer resistance of the door opening side need to be strengthened. Therefore, it is urgent to design a fire door structure that meets the new national standard. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of water-resistant fire door structure.

[0004] This new type of water-damage resistant fireproof door structure includes: a door leaf and a door frame; a connection between the door leaf and the door frame; the door leaf includes a core layer, a first magnesium oxide fireproof board, and a medium fiberboard arranged sequentially from the inside out; the door frame includes a core layer, a fireproof layer, and a medium fiberboard arranged sequentially from the inside out, the core layer being composed of flame-retardant engineered wood, and the fireproof layer being composed of magnesium oxide fireproof board.

[0005] Preferably, the core layer includes a fireproof core panel and a frame, the frame being composed of horizontal and vertical splicing of a first flame-retardant engineered wood; the fireproof core panel is filled inside the frame.

[0006] Preferably, the first layer of magnesium oxide fireproof board on one side of the door leaf is provided in at least two layers.

[0007] Preferably, the door frame is covered with MDF, and a core layer is attached to the inner side of the MDF on the back of the door frame, while the other three sides of the core layer are covered with a fireproof layer.

[0008] Preferably, the side of the door frame connected to the door leaf is recessed inward, and the door frame is divided into a recessed part and a protruding part.

[0009] Preferably, the core layer includes a second flame-retardant laminated material and a third flame-retardant laminated material. The second flame-retardant laminated material is located in the recessed part inside the door frame, and the third flame-retardant laminated material is located in the protruding part inside the door frame. The thickness of the third flame-retardant laminated material is greater than the thickness of the second flame-retardant laminated material.

[0010] Preferably, the fireproof layer includes a second magnesium oxide fireproof board and a first magnesium oxide fireproof board; the second magnesium oxide fireproof board and the second flame-retardant engineered wood are arranged in parallel, and the second magnesium oxide fireproof board is located in the protruding part inside the door frame; the rest of the fireproof layer is the first magnesium oxide fireproof board; the thickness of the second magnesium oxide fireproof board is greater than that of the first magnesium oxide fireproof board.

[0011] The beneficial effects of this utility model are:

[0012] 1) The door leaf of this utility model is equipped with a frame made of flame-retardant integrated material spliced ​​horizontally and vertically, which has good stability; the frame is filled with door core board, which reduces the size of the door core board, reduces the impact force of water hammer on the whole core board, and ensures the integrity of the core board; two layers of glass magnesium fireproof board are set on the front and back sides of the door leaf to ensure the integrity of the internal core material and baffle after burning test.

[0013] 2) The fire-resistant and water-impact-resistant surface of the door frame of this utility model is enhanced with high-density magnesium oxide fireproof board to improve fire resistance, and flame-retardant engineered wood is used as the frame material inside to ensure water impact resistance. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the door leaf and door frame structure;

[0015] Figure 2 This is a diagram of the wooden reinforced frame for the door panel;

[0016] Figure 3 It is a door core filling diagram;

[0017] Figure 4 It is a diagram of the door frame structure;

[0018] Figure 5 This is a diagram of the fire-exposed side of the door leaf and door frame.

[0019] Explanation of reference numerals in the attached drawings: 1. Medium fiberboard; 2. First magnesium oxide fireproof board; 3. Fireproof door core board; 4. First flame-retardant engineered wood; 5. Second magnesium oxide fireproof board; 6. Third flame-retardant engineered wood; 7. Detailed Implementation

[0020] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0021] As one embodiment, a novel water-damage resistant fire door structure is proposed, such as... Figure 1-5 As shown, it includes: a door leaf and a door frame; the connection between the door leaf and the door frame; the door leaf includes, from the inside out, a core layer, a first magnesium oxide fireproof board 2, and a medium fiberboard 1; the door frame includes, from the inside out, a core layer, a fireproof layer, and a medium fiberboard 1, the core layer is composed of flame-retardant engineered wood, which is made by impregnating multiple layers of veneer with flame-retardant liquid and then pressing them together, and its fire resistance is far superior to other surface flame-retardant solid wood materials, which improves water hammer resistance while ensuring fire resistance; the fireproof layer is composed of magnesium oxide fireproof board, which is a high-density magnesium oxide fireproof board; the thickness of the medium fiberboard 1 is 2.7mm.

[0022] like Figure 1-3 As shown, the core layer includes a fireproof core board 3 and a frame. The frame is composed of 28mm thick first flame-retardant engineered wood 4 spliced ​​horizontally and vertically, and the frame has good stability. The 28mm thick fireproof core board 3 is filled in the frame, which reduces the size of the fireproof core board 3, reduces the impact force of water hammer on the entire fireproof core board 3, and ensures the integrity of the fireproof core board 3. Two layers of 5mm thick first magnesium oxide fireproof board 2 are set on one side inside the door leaf, which ensures the fireproof effect and ensures the integrity of the internal core material and retaining material after the fire test.

[0023] like Figure 4 and Figure 5 As shown, the door frame is covered with 2.7mm thick MDF 1, and the inner side of the MDF 1 on the back of the door frame is bonded with a core layer, and the other three sides of the core layer are covered with a fireproof layer; the side of the door frame connected to the door leaf is recessed inward, and the door frame is divided into a recessed part and a protruding part.

[0024] The core layer includes a 24mm thick second flame-retardant integrated material 5 and a 29mm thick third flame-retardant integrated material 7. The second flame-retardant integrated material 5 is located in the recessed part inside the door frame, and the third flame-retardant integrated material 7 is located in the protruding part inside the door frame. The thickness of the third flame-retardant integrated material 7 is greater than the thickness of the second flame-retardant integrated material 5.

[0025] The fireproof layer includes a 15mm thick second magnesium oxide fireproof board 6 and a 5mm thick first magnesium oxide fireproof board 2; the second magnesium oxide fireproof board 6 and the second flame-retardant composite material 5 are arranged in parallel, and the second magnesium oxide fireproof board 6 is located in the protruding part inside the door frame; the rest of the fireproof layer is the first magnesium oxide fireproof board 2; the thickness of the second magnesium oxide fireproof board 6 is greater than that of the first magnesium oxide fireproof board 2.

[0026] The fire-exposed surface of the door frame is reinforced with a 5mm thick first magnesium oxide fireproof board 2. The first magnesium oxide fireproof board 2 is a high-density magnesium oxide fireproof board, which enhances the fire resistance without affecting the holding power of the hinge screws. The interior uses flame-retardant engineered wood with better flame-retardant performance than flame-retardant solid wood to ensure structural integrity and ensure that the water hammer test is passed smoothly after the fire resistance test.

Claims

1. A novel water-hammer-resistant fire door structure, characterized in that, include: Door leaf and door frame; connection between door leaf and door frame; door leaf includes a core layer, a first magnesium oxide fireproof board and a medium fiberboard arranged sequentially from the inside out; door frame includes a core layer, a fireproof layer and a medium fiberboard arranged sequentially from the inside out, the core layer is composed of flame-retardant engineered wood and the fireproof layer is composed of magnesium oxide fireproof board.

2. The novel water-hammer-resistant fireproof door structure according to claim 1, characterized in that, The core layer includes a fireproof core panel and a frame. The frame is composed of horizontal and vertical splicing of the first flame-retardant engineered wood. The fireproof core panel is filled inside the frame.

3. The novel water-hammer-resistant fireproof door structure according to claim 1, characterized in that, The first layer of glass magnesium fireproof board on one side inside the door leaf is set in at least two layers.

4. The novel water-hammer-resistant fireproof door structure according to claim 1, characterized in that, The door frame is covered with MDF, and the inner side of the MDF on the back of the door frame is bonded with a core layer, while the other three sides of the core layer are covered with a fireproof layer.

5. The novel water-hammer-resistant fireproof door structure according to claim 4, characterized in that, The side of the door frame that connects to the door leaf is recessed inwards, and the door frame is divided into a recessed part and a protruding part.

6. The novel water-hammer-resistant fireproof door structure according to claim 5, characterized in that, The core layer includes a second flame-retardant laminated material and a third flame-retardant laminated material. The second flame-retardant laminated material is located in the recessed part inside the door frame, and the third flame-retardant laminated material is located in the protruding part inside the door frame. The thickness of the third flame-retardant laminated material is greater than the thickness of the second flame-retardant laminated material.

7. The novel water-hammer-resistant fireproof door structure according to claim 5, characterized in that, The fireproof layer includes a second magnesium oxide fireproof board and a first magnesium oxide fireproof board; the second magnesium oxide fireproof board and the second flame-retardant engineered wood are arranged in parallel, and the second magnesium oxide fireproof board is located in the protruding part inside the door frame; the rest of the fireproof layer is the first magnesium oxide fireproof board; the thickness of the second magnesium oxide fireproof board is greater than that of the first magnesium oxide fireproof board.

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