Thermal insulation type fire door
By employing a three-layer composite insulation structure of rock wool board, glass wool board, and perlite board in the fire door, and using insert rods, threaded holes, and bolts to fix the stainless steel cover to the shell, the problem of insufficient heat insulation performance of the fire door is solved, achieving efficient heat insulation and structural stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 福建宸皓实业有限公司
- Filing Date
- 2025-09-30
- Publication Date
- 2026-07-14
AI Technical Summary
Existing fire doors are inadequate in terms of heat insulation, allowing heat to quickly pass through to the other side of the door, threatening personnel safety and potentially accelerating the spread of fire.
The structure employs a three-layer composite insulation system, comprising rock wool board, glass wool board, and perlite board. The glass wool board is positioned between the rock wool board and the perlite board and is fixed to the shell via a stainless steel cover, insert rods, threaded holes, and bolts, thereby enhancing insulation performance and structural stability.
It effectively blocks heat transfer, improves the heat insulation effect of fire doors, reduces the impact of high temperature on the indoor environment during a fire, enhances the structural strength and stability of the door, and prevents heat from being conducted from the edge of the door frame and penetrating through gaps.
Smart Images
Figure CN224496273U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire door technology, specifically to a heat-insulating fire door. Background Technology
[0002] In modern buildings, fire safety is a crucial consideration. Fire doors, as an important component of fire-resistant partitions, effectively prevent the spread of fire and smoke during a fire, buying valuable time for evacuation and fire rescue, thereby minimizing casualties and property damage. According to relevant building fire codes, fire doors must be appropriately installed in different types of buildings and different areas within buildings to meet specific fire-resistant partitioning and safe evacuation requirements.
[0003] According to announcement number CN 207829748 U, a fire door is described, the key technical points of which are: a fire door including a door leaf and a door frame; a slot is provided in the door frame, and a locking pin assembly is provided in the slot; a locking hook is provided in the door leaf that slides with the locking pin assembly; a sliding rod is fixedly connected to the locking hook; a limiting block extends from the sliding rod to limit its rotation; a sliding groove is provided in the door leaf for the limiting block to slide; a threaded cylinder is threadedly connected to the side of the sliding rod away from the locking hook; a linkage gear is provided on the outer circumference of the thread; the linkage gear meshes with a drive gear; a trigger rod is coaxially connected to the drive gear; the trigger rod is rotatably connected to the door leaf; a trigger block is fixedly connected to the trigger rod; and a placement groove is provided on the door frame for the trigger block to slide into.
[0004] The device locks the door by rotating it, causing a trigger block to abut against a slot and rotate, thus locking the door. However, this device still uses a traditional fire door. While it offers some fire protection, it has significant shortcomings in thermal insulation. It uses only a single layer of insulation material or the choice of insulation material is inadequate. This allows heat to quickly pass through the fire door to the other side during a fire, causing a rapid increase in temperature on the other side, threatening the safety of people, and potentially accelerating the spread of fire to other areas. Utility Model Content
[0005] The purpose of this utility model is to provide a heat-insulating fire door to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat-insulating fire door, comprising a stainless steel door frame, wherein hinges are fixedly connected at equal intervals on the upper and lower left side of the front of the stainless steel door frame, a stainless steel shell is hinged inside the stainless steel door frame via the hinges, a stainless steel cover is provided on the surface of the stainless steel shell, a handle is fixedly connected to the front of the stainless steel shell near the right side, a heat insulation mechanism is provided inside the stainless steel shell, and an installation and fixing mechanism is provided on the front of the stainless steel cover.
[0007] The heat insulation mechanism includes a rock wool board, which is fixedly connected to the front of the inner wall of the stainless steel shell. A glass wool board is fixedly connected to the inner wall of the stainless steel shell. A perlite board is fixedly connected to the inner wall of the stainless steel shell near the back. A rectangular limiting ring is fixedly connected to the back of the inner wall of the stainless steel door frame. A rectangular heat insulation strip is fixedly connected to the front of the rectangular limiting ring.
[0008] Preferably, the glass wool board is located between the rock wool board and the perlite board.
[0009] Preferably, the back of the stainless steel cover is in contact with the front of the rectangular heat insulation strip.
[0010] Preferably, the mounting and fixing mechanism includes insert rods, which are symmetrically fixed to the front of the stainless steel cover. The front ends of the four fixing rods are provided with threaded holes, and bolts are threaded into the threaded holes. The front of the stainless steel cover is provided with symmetrical connecting holes.
[0011] Preferably, the front sides of the rock wool board, glass wool board, and perlite board are all provided with holes that match the insertion rod, and the insertion rod is inserted through and into the hole.
[0012] Preferably, the bolt is inserted into the connecting hole.
[0013] Preferably, the stainless steel cover is fixedly connected to the back of the stainless steel shell by a fixing rod, threaded hole and bolt.
[0014] Compared with the prior art, this utility model provides a heat-insulated fire door, which has the following beneficial effects:
[0015] 1. This insulated fire door employs a three-layer insulation structure consisting of rock wool board, glass wool board, and perlite board, with the glass wool board positioned between the rock wool board and the perlite board. This multi-layered, composite, and rationally arranged design effectively blocks heat transfer, significantly improving the fire door's insulation performance and providing more reliable insulation protection for the interior. It also reduces the impact of high temperatures on the indoor environment during a fire. Furthermore, the rectangular limiting ring and rectangular heat insulation strip installed on the back of the inner wall of the stainless steel door frame further enhance the insulation performance and reduce heat conduction from the door frame edges.
[0016] 2. In the installation and fixing mechanism of this heat-insulating fire door, the stainless steel cover body is matched and inserted into the holes on the rock wool board, glass wool board and perlite board by the insertion rod, and then bolts are used to connect the stainless steel cover body and the stainless steel shell through the connecting hole and the threaded hole. This connection method not only makes installation and disassembly convenient, but also ensures the tight connection between the components, and improves the overall structural strength and stability of the fire door. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;
[0019] Figure 2 This is a three-dimensional cross-sectional view of the right side of the stainless steel shell of this utility model.
[0020] Figure 3 This is a three-dimensional schematic diagram of the rock wool board, glass wool board and perlite board of this utility model;
[0021] Figure 4 This is a three-dimensional schematic diagram of the rectangular limiting ring and rectangular heat insulation strip of this utility model.
[0022] Figure 5 This is a three-dimensional schematic diagram of the structural installation and fixing mechanism of this utility model.
[0023] In the diagram: 1. Stainless steel door frame; 2. Hinge; 3. Stainless steel shell; 4. Stainless steel cover; 5. Handle; 6. Thermal insulation mechanism; 61. Rock wool board; 62. Glass wool board; 63. Perlite board; 64. Rectangular limiting ring; 65. Rectangular thermal insulation strip; 7. Installation and fixing mechanism; 71. Insert rod; 72. Threaded hole; 73. Bolt; 74. Connection hole. Detailed Implementation
[0024] 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.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] This utility model provides the following technical solution: Example 1
[0027] Please see Figures 1-4 This utility model provides a technical solution: a heat-insulating fire door, including a stainless steel door frame 1, hinges 2 are fixedly connected at equal intervals on the upper and lower left side of the front of the stainless steel door frame 1, a stainless steel shell 3 is hinged inside the stainless steel door frame 1 through the hinges 2, a stainless steel cover 4 is provided on the surface of the stainless steel shell 3, a handle 5 is fixedly connected to the front of the stainless steel shell 3 near the right side, a heat insulation mechanism 6 is provided inside the stainless steel shell 3, and an installation and fixing mechanism 7 is provided on the front of the stainless steel cover 4.
[0028] The heat insulation mechanism 6 includes a rock wool board 61, which is fixedly connected to the front of the inner wall of the stainless steel shell 3. A glass wool board 62 is fixedly connected to the inner wall of the stainless steel shell 3. A perlite board 63 is fixedly connected to the inner wall of the stainless steel shell 3 near the back. A rectangular limiting ring 64 is fixedly connected to the back of the inner wall of the stainless steel door frame 1. A rectangular heat insulation strip 65 is fixedly connected to the front of the rectangular limiting ring 64.
[0029] Glass wool board 62 is located between rock wool board 61 and perlite board 63.
[0030] The back of the stainless steel cover 4 is in contact with the front of the rectangular heat insulation strip 65. Example 2
[0031] Please see Figure 5 Furthermore, based on Embodiment 1, the installation and fixing mechanism 7 is obtained.
[0032] The mounting and fixing mechanism 7 includes insert rods 71, which are symmetrically fixed to the front of the stainless steel cover 4. The front ends of the four fixing rods are provided with threaded holes 72, and bolts 73 are connected to the threaded holes 72. The front of the stainless steel cover 3 is provided with connecting holes 74 symmetrically.
[0033] The front sides of rock wool board 61, glass wool board 62, and perlite board 63 are all provided with holes that match the insertion rod 71, and the insertion rod 71 is inserted through the surface of the insertion rod and inserted into the hole.
[0034] Bolt 73 is inserted into connection hole 74.
[0035] The stainless steel cover 4 is fixedly connected to the back of the stainless steel housing 3 by a fixing rod, threaded hole 72 and bolt 73.
[0036] In actual operation, when this device is in use, hinges 2 are fixedly connected at equal intervals on the upper and lower left side of the front of the stainless steel door frame 1. The stainless steel shell 3 is hinged to the stainless steel door frame 1 through these hinges 2. This hinge design allows the stainless steel shell 3 to rotate around the hinges 2 as an axis, thereby realizing the opening and closing of the fire door. When it is necessary to open the fire door, grasp the handle 5 fixedly connected near the right side of the front of the stainless steel shell 3 and apply an outward pulling force. The stainless steel shell 3 will rotate around the hinges 2, and the door will be opened. Conversely, pushing the handle 5 inward will close the door. The heat insulation mechanism 6 set inside the stainless steel shell 3 constructs a highly efficient heat insulation barrier through the synergistic effect of multiple materials. Rock wool board 61 is fixedly connected to the front of the inner wall of the stainless steel shell 3. Glass wool board 62 is fixed to the inner wall of the stainless steel shell 3 and is located between rock wool board 61 and perlite board 63. Perlite board 63 is fixed to the inner wall of the stainless steel shell 3 near the back. The three form "rock wool board 61 - glass wool board 62 - perlite board 63". The three-layer composite insulation structure ensures that when high temperatures or fires occur outside, heat first contacts the outer side of the stainless steel shell 3. The stainless steel shell 3 itself has a certain degree of high temperature resistance, which can initially block some heat transfer. Subsequently, the heat is transferred through the stainless steel shell 3 to the inner insulation layer. The rock wool board 61, with its porous fiber structure, can effectively block heat conduction and convection. The glass wool board 62, with its ultra-fine glass fiber characteristics, further weakens the heat transfer efficiency. The perlite board 63, with its low thermal conductivity, provides the final barrier against residual heat. The three layers of insulation materials play an insulation role from different dimensions, forming a gradient heat attenuation, which greatly reduces the rate and amount of heat transfer to the other side of the door, achieving excellent insulation effect. The rectangular limiting ring 64 fixed on the back of the inner wall of the stainless steel door frame 1, and the rectangular insulation strip 65 fixedly connected to its front, play a key role in sealing and preventing heat penetration when the door is closed. When the stainless steel shell 3 rotates around the hinge 2 to the closed position, the back of the stainless steel cover 4 and the rectangular insulation strip 65 are connected to the rectangular insulation strip 65. The heat strip 65 is in close contact with the front, and the rectangular limiting ring 64 positions the stainless steel cover 4 to ensure the fitting accuracy between the stainless steel cover 4 and the rectangular heat insulation strip 65. The rectangular heat insulation strip 65 itself has good heat insulation and sealing performance, which can fill the gap between the stainless steel cover 4 and the stainless steel door frame 1, prevent high-temperature gas or flames from penetrating from the gap, and prevent heat from passing through the gap around the internal heat insulation layer to the other side of the door, further enhancing the overall heat insulation and fireproof capability of the door and preventing heat insulation leaks. The stainless steel cover 4 and the stainless steel shell 3 are fixed by the cooperation structure of the insert rod 71, threaded hole 72, bolt 73 and connecting hole 74. The front end of the insert rod 71 has a threaded hole 72, and the front of the stainless steel shell 3 has symmetrical connecting holes 74 that are compatible with the bolt 73. After the heat insulation layer and the stainless steel cover 4 are pre-positioned, the bolt 73 is screwed into the threaded hole 72 at the front end of the insert rod 71. As the bolt 73 is tightened, the bolt 73 gradually moves towards the stainless steel shell 3.Until the end of bolt 73 is inserted into the connecting hole 74 on the front of the stainless steel housing 3, bolt 73 forms a firm threaded connection with the insert rod 71 through the threaded hole 72. Simultaneously, the connecting hole 74 limits the bolt 73, tightly fixing the stainless steel cover 4, the heat insulation layer, and the stainless steel housing 3 into a single unit. This prevents loosening or separation of components during use, ensuring the stability of the door structure. If subsequent maintenance or replacement of the heat insulation layer is required, simply unscrew bolt 73 in the reverse direction to release the stainless steel cover 4 from the stainless steel housing 3. After removing the stainless steel cover 4, the internal heat insulation layer can be accessed. The operation is convenient and does not damage the main structure of the door.
[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A heat-insulated fire door, comprising a stainless steel door frame (1), characterized in that: The stainless steel door frame (1) has hinges (2) fixedly connected at equal intervals on the left side of the front. The stainless steel door frame (1) has a stainless steel shell (3) hinged inside the stainless steel door frame (1) by the hinges (2). The stainless steel shell (3) has a stainless steel cover (4) on its surface. The stainless steel shell (3) has a handle (5) fixedly connected to the right side of the front. The stainless steel shell (3) has a heat insulation mechanism (6) inside. The stainless steel cover (4) has an installation and fixing mechanism (7) on its front. The heat insulation mechanism (6) includes a rock wool board (61), which is fixedly connected to the front of the inner wall of the stainless steel shell (3). A glass wool board (62) is fixedly connected to the inner wall of the stainless steel shell (3). A perlite board (63) is fixedly connected to the inner wall of the stainless steel shell (3) near the back. A rectangular limiting ring (64) is fixedly connected to the back of the inner wall of the stainless steel door frame (1). A rectangular heat insulation strip (65) is fixedly connected to the front of the rectangular limiting ring (64).
2. The heat-insulating fire door according to claim 1, characterized in that: The glass wool board (62) is located between the rock wool board (61) and the perlite board (63).
3. The heat-insulating fire door according to claim 1, characterized in that: The back of the stainless steel cover (4) is in contact with the front of the rectangular heat insulation strip (65).
4. The heat-insulating fire door according to claim 1, characterized in that: The installation and fixing mechanism (7) includes a plug rod (71), which is symmetrically fixed to the front of the stainless steel cover (4) in the upper, lower and left and right. The front ends of the four plug rods are provided with threaded holes (72), and bolts (73) are threaded in the threaded holes (72). The front of the stainless steel shell (3) is symmetrically provided with connecting holes (74) in the upper, lower and left and right.
5. A heat-insulating fire door according to claim 4, characterized in that: The front of the rock wool board (61), the front of the glass wool board (62), and the front of the perlite board (63) are all provided with holes that match the insertion rod (71), and the surface of the insertion rod (71) is penetrated and inserted into the hole.
6. A heat-insulating fire door according to claim 4, characterized in that: The bolt (73) is inserted into the connecting hole (74).
7. A heat-insulating fire door according to claim 4, characterized in that: The stainless steel cover (4) is fixedly connected to the back of the stainless steel shell (3) by a fixing rod, a threaded hole (72) and a bolt (73).