Filling type steel fireproof door

Abstract

The utility model discloses a filling type steel fireproof door which comprises a door leaf and a perlite plate filled in the door leaf, and further comprises a protection assembly arranged on the door leaf and used for protecting the perlite plate, the protection assembly comprises two protection main plates, and the two protection main plates are formed by a plurality of transverse rib plates and longitudinal rib plates in a staggered mode. Four protective side plates are arranged between the two protective main plates, and the four protective side plates are connected with the two protective main plates through sunk screws. Through the arrangement of the protection assembly, the assembly strength of the perlite plate filled into the door leaf is enhanced, meanwhile, the impact force borne by the perlite plate is reduced through two layers of buffering protection of the buffering assembly, and therefore the risk that the perlite plate is broken under the impact action of external force is reduced, and the service life of the perlite plate is prolonged. Therefore, the integrity of the filling material in the door leaf is guaranteed, and the heat insulation and fireproof performance of the fireproof door is further guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically a filled steel fire door. Background Technology

[0002] Existing steel fire doors are mainly filled with perlite boards, which utilize the good fire resistance of perlite boards. Perlite boards have a high melting point and can maintain stable performance at high temperatures to improve the fire resistance of steel fire doors.

[0003] During daily use, steel fire doors are repeatedly opened and closed due to the passage of personnel or machinery. For example, in places such as logistics warehouses, forklifts and other equipment may accidentally collide with the fire doors, causing them to experience significant impact. Because perlite boards have relatively low strength, they can crack under the impact of external forces. The broken perlite boards create gaps inside the door, damaging the integrity of the filling material and thus reducing the fire door's heat insulation and fire resistance performance.

[0004] Therefore, there is an urgent need for a type of infill steel fire door to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a filled steel fire door, comprising a door leaf and a perlite board filled in the door leaf, wherein a top plate is connected to the top of the door leaf by countersunk screws, and further comprising a protective component disposed in the door leaf for protecting the perlite board;

[0006] The protective assembly includes two main protective plates, which are formed by multiple interlaced transverse and longitudinal stiffeners. Four protective side plates are provided between the two main protective plates, which are connected to the two main protective plates by countersunk screws. The door leaf is provided with a fixing assembly for fixing the main protective plates and the protective side plates. The main protective plates and the protective side plates are provided with a buffer assembly for buffering the impact force received by the perlite board.

[0007] The buffer assembly includes multiple buffer tubes fixedly connected to the protective main board and the protective side plate near the inner wall of the door leaf. Each buffer tube is slidably connected to a buffer rod. One end of each buffer rod located inside the buffer tube is fixedly connected to a buffer plate. The side of each buffer plate away from the buffer rod is fixedly connected to a spring. The other end of each spring is connected to the bottom wall of the buffer tube.

[0008] Each of the aforementioned buffer rods has a retaining ball fixedly connected to one end near the inner wall of the door.

[0009] Each of the buffer plates has four through holes, and each of the buffer tubes is filled with damping fluid, which passes through the four through holes.

[0010] The fixing component includes multiple fixing holes on one side of the door leaf, each fixing hole is provided in two sets, each fixing hole is threaded with a countersunk bolt, and the four protective side plates have multiple inclined surfaces on two sides opposite to the two sets of fixing holes.

[0011] The door leaf has a lock mounting slot, and the protective main plate and the protective side plate each have clearance holes for installing the lock box.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model, through the setting of protective components, enhances the assembly strength of the perlite board filled into the door leaf, while utilizing the two-layer buffer protection of the buffer component to reduce the impact force on the perlite board, thereby reducing the risk of the perlite board breaking under external impact, thus ensuring the integrity of the filling material inside the door leaf, and thus ensuring the heat insulation and fireproof performance of the fire door. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the protective component and buffer component of this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the clamping ball structure of this utility model.

[0018] In the diagram: 101, door leaf; 102, perlite board; 103, top plate; 201, protective main plate; 202, protective side plate; 301, buffer tube; 302, buffer plate; 303, buffer rod; 304, spring; 305, anti-locking ball; 306, through hole; 401, fixing hole; 402, countersunk bolt; 403, bevel; 5, locking slot. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Please see Figures 1-4 The illustrated type of filled steel fire door includes a door leaf 101 and a perlite board 102 filled in the door leaf 101. The top of the door leaf 101 is connected to a top plate 103 by countersunk screws. It also includes a protective component disposed on the door leaf 101 for protecting the perlite board 102.

[0022] The protective assembly includes two protective main plates 201, which are formed by multiple interlaced transverse and longitudinal stiffeners. Four protective side plates 202 are provided between the two protective main plates 201. The four protective side plates 202 are connected to the two protective main plates 201 by countersunk screws. The door leaf 101 is provided with a fixing assembly for fixing the protective main plates 201 and the protective side plates 202. The protective main plates 201 and the protective side plates 202 are provided with a buffering assembly for buffering the impact force received by the perlite board 102.

[0023] It should be noted that: by setting up the protective components, the assembly strength of the perlite board 102 filled into the door leaf 101 is enhanced. At the same time, the two-layer buffer protection of the buffer components reduces the impact force on the perlite board 102, thereby reducing the risk of the perlite board 102 breaking under the impact of external force, thus ensuring the integrity of the filling material inside the door leaf 101, and thus ensuring the heat insulation and fireproof performance of the fire door.

[0024] Please see Figure 2 and Figure 3 The buffer assembly shown in the figure includes multiple buffer tubes 301 fixedly connected to the protective main plate 201 and the protective side plate 202 near the inner wall of the door leaf 101. Each buffer tube 301 is slidably connected to a buffer rod 303. One end of each buffer rod 303 located inside the buffer tube 301 is fixedly connected to a buffer plate 302. A spring 304 is fixedly connected to the side of each buffer plate 302 away from the buffer rod 303. The other end of each spring 304 is connected to the bottom wall of the buffer tube 301.

[0025] It should be noted here that the impact force was dissipated through the setting of the buffer component and the two layers of buffer protection.

[0026] Please see Figure 2 and Figure 3 Each buffer rod 303 in the figure has a locking ball 305 fixedly connected to one end near the inner wall of the door leaf 101;

[0027] It should be noted that the setting of the clamping ball 305 is used to guide and reserve space for the insertion of the protective main board 201 and the protective side plate 202 into the door leaf 101, and to make the protective main board 201 and the protective side plate 202 abut against the inner wall of the door leaf 101.

[0028] Please see Figure 2 and Figure 3 Each buffer plate 302 in the figure has four through holes 306, and each buffer tube 301 is filled with damping fluid, which passes through the four through holes 306.

[0029] It should be noted that, through the through hole 306 and the damping fluid, as the buffer plate 302 moves within the buffer tube 301, it will compress the damping fluid within the buffer tube 301, causing the damping fluid to pass through the through hole 306, thus forming a damping buffer mechanism, which in turn forms a second layer of buffer against the impact force.

[0030] Please see Figure 2 and Figure 3 The fixing components shown in the figure include multiple fixing holes 401 opened on one side of the door leaf 101. Each fixing hole 401 is provided in two sets. Each fixing hole 401 is threaded with a countersunk bolt 402. Multiple inclined surfaces 403 are opened on the two sides of the four protective side plates 202 opposite to the two sets of fixing holes 401.

[0031] It should be noted that by setting up the fixing components, the perlite board 102 is fixed, and the protective side plate 202 abuts against the filling bottom wall of the door leaf 101, thereby fixing the installation position of the perlite board 102.

[0032] Working principle: When using this infilled steel fire door, perlite board 102 needs to be filled into the door leaf 101 first. When filling the perlite board 102, the perlite board 102 is first placed between the protective main plate 201 and the protective side plate 202. Then, the protective main plate 201 and the protective side plate 202 are installed into the door leaf 101 through the assembly hole at the bottom of the door leaf 101, thereby filling the perlite board 102 into the door leaf 101.

[0033] After the perlite board 102 is filled into the door leaf 101, the top plate 103 is first connected to the assembly hole of the door leaf 101 using countersunk screws. Then, the countersunk bolt 402 is rotated. Under the transmission action of the thread engagement between the countersunk bolt 402 and the fixing hole 401, the countersunk bolt 402 will move closer to the protective side plate 202. When one end of the countersunk bolt 402 abuts against the inclined surface 403 on the protective side plate 202, the protective side plate 202 will be pushed away from the top plate 103 under the interaction. With the continuous rotation of the countersunk bolt 402, when the protective side plate 202 abuts against the filling bottom wall of the door leaf 101, the rotation of the countersunk bolt 402 can be stopped. Thus, by using the countersunk bolt 402 to abut against the protective side plate 202, the perlite board 102 is fixed, and the protective side plate 202 abuts against the filling bottom wall of the door leaf 101, thereby fixing the installation position of the perlite board 102.

[0034] After the perlite board 102 is filled into the door leaf 101 and fixed, the door leaf 101 can be installed on the door frame via hinges, and the door leaf 101 can be automatically closed by a door closer. In the event of a fire, the steel door frame and door leaf 101 of the steel fire door will form the first line of defense. Steel has a high melting point (generally around 1370-1500℃), which can withstand direct burning by flames in the early stages of a fire, preventing flames from directly contacting the internal perlite board 102 filling material, thereby slowing down the spread of flames through the door. At the same time, perlite board 102 itself is an inorganic non-metallic material with good flame retardancy. Its main component is perlite ore, which is formed after high-temperature roasting and expansion. In a fire environment, perlite... The perlite board 102 is non-combustible and does not act as a medium for flame propagation like combustible materials, thus effectively blocking the spread of flames on both sides of the door. Furthermore, the perlite board 102 has a porous structure composed of many tiny pores, which results in a low thermal conductivity (typically between 0.04-0.07 W / (m·K)). In the event of a fire, heat is mainly transferred from one side of the flame to the other through thermal conduction. The low thermal conductivity of the perlite board 102 can effectively prevent the rapid transfer of heat, ensuring that the temperature of the non-fired surface of the fire door does not rise rapidly within a certain period of time. Thus, through the combined action of the steel door leaf 101 and the perlite board 102, the conduction of flames and heat on both sides of the fire door is blocked, thereby achieving a fireproof effect.

[0035] During the daily use of the protective door, it is repeatedly opened and closed due to the passage of personnel or machinery. When the surface of the door leaf 101 is accidentally impacted by equipment such as a forklift, the impact force will be transmitted to the abutment ball 305. Consequently, the buffer plate 302 at one end of the buffer rod 303 moves within the buffer tube 301. During the movement of the buffer plate 302 within the buffer tube 301, the spring 304 will be compressed, causing the spring 304 to deform under force and generate elastic force. Under the action of the elastic force of the spring 304, the first layer of buffering against the impact force is formed. At the same time, during the movement of the buffer plate 302 within the buffer tube 301, the damping fluid within the buffer tube 301 will be squeezed. The damping fluid passes through the through hole 306, thus forming a damping buffer mechanism. This creates a second layer of buffer against the impact force. Through these two layers of buffer protection, the impact force is dissipated. After the impact force is buffered by the buffer components, the remaining impact force is transmitted to the protective main plate 201 and the protective side plate 202. The protective side plate 201 and the protective main plate 202 then intercept the remaining impact force, thereby reducing the impact force on the perlite board 102. This reduces the risk of the perlite board 102 breaking under external impact, ensuring the integrity of the filling material inside the door leaf 101 and thus guaranteeing the heat insulation and fireproof performance of the fire door.

[0036] Example 2

[0037] Please see Figure 1 This embodiment further illustrates Example 1. The door leaf 101 in the figure is provided with a lock mounting slot 5, and the protective main plate 201 and the protective side plate 202 are respectively provided with clearance holes for installing the lock box.

[0038] It should be noted that the setting of the lock mounting slot 5 facilitates the installation of the lock box. The lock box is a channel-shaped part made of channel steel frame and wrapped with fireproof board. It is welded to the lock mounting slot 5 to form a lock body cavity, ensuring that the lock body is wrapped in the fireproof board cavity, thereby effectively improving the lock body's heat insulation, heat transfer prevention, and fire prevention performance.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A type of infilled steel fire door, comprising: A door leaf (101) and a perlite board (102) filled in the door leaf (101), the top of the door leaf (101) being connected to a top plate (103) by countersunk screws; Its characteristic is that it further includes: A protective component installed on the door leaf (101) to protect the perlite board (102); The protective assembly includes two protective main plates (201), which are formed by multiple interlaced transverse and longitudinal stiffeners. Four protective side plates (202) are provided between the two protective main plates (201). The four protective side plates (202) are connected to the two protective main plates (201) by countersunk screws. The door leaf (101) is provided with a fixing assembly for fixing the protective main plates (201) and the protective side plates (202). The protective main plates (201) and the protective side plates (202) are provided with a buffer assembly for buffering the impact force received by the perlite board (102).

2. A filled steel fire door according to claim 1, characterized in that: The buffer assembly includes multiple buffer tubes (301) fixedly connected to the protective main plate (201) and the protective side plate (202) near the inner wall of the door leaf (101). Each buffer tube (301) is slidably connected to a buffer rod (303). One end of each buffer rod (303) located inside the buffer tube (301) is fixedly connected to a buffer plate (302). A spring (304) is fixedly connected to the side of each buffer plate (302) away from the buffer rod (303). The other end of each spring (304) is connected to the bottom wall of the buffer tube (301).

3. A filled steel fire door according to claim 2, characterized in that: Each of the buffer bars (303) has a retaining ball (305) fixedly connected to one end near the inner wall of the door leaf (101).

4. A filled steel fire door according to claim 2, characterized in that: Each of the buffer plates (302) has four through holes (306), and each of the buffer tubes (301) is filled with damping fluid, which passes through the four through holes (306).

5. A filled steel fire door according to claim 1, characterized in that: The fixing component includes multiple fixing holes (401) opened on one side of the door leaf (101), each fixing hole (401) is provided in two sets, each fixing hole (401) is threaded with a countersunk bolt (402), and the four protective side plates (202) are provided with multiple inclined surfaces (403) on two sides opposite to the two sets of fixing holes (401).

6. A filled steel fire door according to claim 1, characterized in that: The door leaf (101) has a lock mounting slot (5), and the protective main plate (201) and the protective side plate (202) are respectively provided with clearance holes for installing the lock box.

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