Anti-explosion impact-resistant fireproof door

Abstract

The utility model discloses an anti-explosion impact-resistant fireproof door, which relates to the technical field of fireproof doors, and comprises a fireproof door main body which is fixed on a door frame main body through two hinge main bodies, and a hinge shaft which is arranged between the fireproof door main body and the door frame main body; the hinge shaft is sleeved with the first hinge shaft sleeve, the first hinge shaft sleeve is located in the middle of the hinge shaft, and a cavity allowing the first hinge shaft sleeve to move is reserved in the first hinge shaft sleeve; according to the fireproof door, when the fireproof door main body is subjected to impact force, the impact force can be sequentially transmitted to the door leaf hinge plate and the first hinge shaft sleeve, due to the fact that the first hinge shaft sleeve and the hinge shaft are spaced, the first hinge shaft sleeve can move towards the hinge shaft when the fireproof door main body is subjected to the impact force, and the impact force is finally transmitted to the hinge shaft instead of the whole hinge main body; and the buffering mechanism can reduce the damage of the first hinge shaft sleeve to the hinge shaft, and the distance avoids instant damage to the hinge body.

Description

Technical Field

[0001] The utility model relates to the technical field of fire doors, in particular to an explosion-resistant and impact-resistant fire door. Background Art

[0002] Explosion-resistant and impact-resistant fireproof doors are doors with special properties. They are mainly used to protect the safety of people and property in extreme situations such as explosions and impacts, and also have fire-proof functions.

[0003] When a fire occurs, the ambient temperature rises sharply, which causes the air inside the building to expand rapidly and the pressure to increase sharply. If there are no proper pressure relief measures, this pressure will continue to accumulate in the enclosed space and eventually produce impact force on structures such as doors;

[0004] When the fire door is in the closed state, this impact force will impact the fire door, and the fire door will first hit the hinge between the fire door and the door frame. Since the hinge is fixed between the door and the door frame, the hinge will directly bear the impact force from the fire door. The hinge is fixed to the door panel by the door hinge plate, and the door hinge plate is then sleeved on the hinge shaft by the hinge shaft sleeve. When the fire door is impacted, this impact force will be transmitted to the hinge shaft sleeve through the door hinge plate, and then the hinge shaft sleeve will be transmitted to the entire hinge, causing the connection between the hinge and the door frame and door panel to loosen, thereby causing the hinge to deflect;

[0005] The looseness and deviation of the hinges will cause the fire door to loosen, which in turn causes the fire door to shake due to the looseness, not only widening the door gap, but also increasing the risk of the fire door falling. Utility Model Content

[0006] The purpose of the present invention is to provide an explosion-resistant and impact-resistant fireproof door to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides an explosion-resistant and impact-resistant fire door, including a fire door body, which is fixed to a door frame body by two hinge bodies, and includes a hinge shaft, which is arranged between the fire door body and the door frame body; a first hinge shaft sleeve, which is sleeved on the hinge shaft and located in the middle of the hinge shaft, and a cavity is reserved in the first hinge shaft sleeve for the first hinge shaft sleeve to move, and the outer wall of the first hinge shaft sleeve is installed with a door hinge plate connected to the outer wall of the fire door body.

[0008] Furthermore, a buffer mechanism is provided in the hinge body for applying resistance to the force of the first hinge sleeve hitting the hinge shaft when the fire door body is subjected to impact force. The buffer mechanism includes a chamber opened in the hinge plate of the door leaf, and the chamber is connected to the internal cavity of the first hinge sleeve. A friction block is installed on the outer wall of the hinge shaft, and the friction block extends into the chamber and is slidably connected to the chamber. The outer wall of the friction block is tightly attached to the inner wall of the chamber, and the side of the friction block away from the hinge shaft is located in the middle of the chamber.

[0009] Furthermore, the buffer mechanism also includes a plurality of friction strips installed on the inner wall of the chamber, and a plurality of strip-shaped grooves are provided on the outer walls on both sides of the friction block. The strip-shaped grooves correspond horizontally to the friction strips, and the strip-shaped grooves are slidably connected to the friction strips.

[0010] Furthermore, a pressing plate is provided in the chamber, an outer wall of the pressing plate abuts against an inner wall of the chamber, and a plurality of springs are connected between the outer wall of the pressing plate and the inner wall of the chamber.

[0011] Furthermore, the outer wall of the hinge shaft is sleeved with two second hinge shaft sleeves, a door frame hinge plate is connected between the two second hinge shaft sleeves, the outer wall of the door frame hinge plate is connected to the outer wall of the second hinge shaft sleeves, and the outer wall of the door frame hinge plate is connected to the outer wall of the door frame body.

[0012] Furthermore, both of the second hinge sleeves are provided with a through hole, and an elastic roll is arranged in the through hole. The fixed end of the elastic roll is connected to the outer wall of the hinge shaft, and the free end of the elastic roll is connected to the inner wall of the through hole. The inner wall of the second hinge sleeve is not in direct contact with the outer wall of the hinge shaft.

[0013] Furthermore, two fixing plates are installed on the outer wall of the hinge shaft, one of which is close to the top end of the hinge shaft, and its bottom is against the top end of the second hinge shaft sleeve above, and the other fixing plate is close to the bottom end of the hinge shaft, and its top is fixed against the bottom end of the second hinge shaft sleeve below.

[0014] Furthermore, the door frame hinge plate is penetrated by a special-shaped opening for the door leaf hinge plate to enter, and the first hinge sleeve is located between the two second hinge sleeves.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In the present invention, when the fire door body is subjected to an impact force, the force will be transmitted to the door leaf hinge plate and the first hinge sleeve in sequence. Since there is a distance between the first hinge sleeve and the hinge shaft, the first hinge sleeve will move toward the hinge shaft when subjected to an impact, and the impact force will eventually be transmitted to the hinge shaft rather than the entire hinge body. In addition, the buffer mechanism will reduce the damage of the first hinge sleeve to the hinge shaft. This distance prevents the hinge body from being damaged instantly.

[0017] 2. In the present invention, when the door hinge plate collides with the first hinge sleeve in the direction of the hinge shaft, the cavity inside the door hinge plate will slide along the outer wall of the friction block and generate friction, thereby slowing down the collision speed and reducing the impact damage to the hinge shaft. The side of the friction block away from the hinge shaft is located in the middle of the cavity, providing a movable space for the cavity so that the cavity will not immediately collide with the friction block during collision, but will first slide along the outer wall for a distance to slow down through friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure between the fire door body and the hinge in the present utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the hinge plate and the first hinge sleeve of the middle door leaf of the present invention;

[0021] Figure 4 This is a schematic diagram of the connection structure between the hinge shaft and the elastic coil in the present invention;

[0022] Figure 5 This is a schematic diagram of the connection structure between the hinge shaft and the slider in the present invention;

[0023] Figure 6 This is a schematic diagram of the connection structure between the slider and the strip-shaped slide in the utility model;

[0024] Figure 7 for Figure 5 A magnified view of the structure at point A in the middle.

[0025] In the figure: 1. Fire door body;

[0026] 2. Door frame body; 3. Hinge body; 301. Door frame hinge plate; 302. Door leaf hinge plate; 303. Hinge shaft; 304. First hinge shaft sleeve; 305. Second hinge shaft sleeve;

[0027] 4. Fixed plate; 5. Special-shaped opening; 6. Through hole; 7. Elastic coil; 8. Friction block; 9. Strip slide; 10. Chamber; 11. Pressing plate; 12. Spring; 13. Friction strip. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The utility model provides a technical solution:

[0030] See Figure 1-Figure 7 As shown, an explosion-proof and impact-resistant fire door includes a fire door body 1, which is fixed to a door frame body 2 by two hinge bodies 3, and includes a hinge shaft 303, which is arranged between the fire door body 1 and the door frame body 2; a first hinge shaft sleeve 304, which is sleeved on the hinge shaft 303 and is located in the middle of the hinge shaft 303, and a cavity for the first hinge shaft sleeve 304 to move is reserved in the first hinge shaft sleeve 304, and a door leaf hinge plate 302 fixedly connected to the outer wall of the fire door body 1 is fixedly installed on the outer wall of the first hinge shaft sleeve 304; a buffer mechanism is used to apply resistance to the force of the first hinge shaft sleeve 304 hitting the hinge shaft 303 when the fire door body 1 is subjected to impact force.

[0031] The hinge body 3 is fixed to the fire door body 1 via a door hinge plate 302. The door hinge plate 302 is fixed to the fire door body 1 via bolts. When the fire door body 1 is subjected to an impact force, the impact force is transmitted to the door hinge plate 302, and then transmitted to the first hinge sleeve 304 via the door hinge plate 302. Since there is a gap between the first hinge sleeve 304 and the hinge shaft 303, the first hinge sleeve 304 subjected to the impact force will move toward the hinge shaft 303.

[0032] As the distance between the first hinge sleeve 304 and the hinge shaft 303 continues to decrease until the first hinge sleeve 304 hits the hinge shaft 303, the impact force will be transmitted to the hinge shaft 303 instead of being directly transmitted to the entire hinge body 3. The distance between the first hinge sleeve 304 and the hinge shaft 303 provides a movable space for the fire door body 1 after it is subjected to impact force. When the fire door body 1 is subjected to unexpected impact force, if there is no such movable space, the hinge body 3 will be damaged instantly, causing the position of the fire door body 1 to shift or deform, affecting its sealing and stability when closed.

[0033] See Figure 5-Figure 6A buffer mechanism is provided in the hinge body 3, which is used to apply resistance to the force of the first hinge sleeve 304 hitting the hinge shaft 303 when the fire door body 1 is subjected to impact force. The buffer mechanism includes a chamber 10 opened in the door hinge plate 302, and the chamber 10 is connected to the internal cavity of the first hinge sleeve 304. A friction block 8 is fixedly installed on the outer wall of the hinge shaft 303, and the friction block 8 extends into the chamber 10 and is slidably connected to the chamber 10. The outer wall of the friction block 8 is tightly attached to the inner wall of the chamber 10, and the side of the friction block 8 away from the hinge shaft 303 is located in the middle of the chamber 10.

[0034] When the door hinge plate 302 and the first hinge shaft sleeve 304 collide toward the hinge shaft 303, the chamber 10 in the door hinge plate 302 will slide along the outer wall of the friction block 8. The chamber 10 is in close contact with the outer wall of the friction block 8. Therefore, when the chamber 10 slides along the friction block 8, the door hinge plate 302 will generate friction with the friction block 8, thereby slowing down the impact speed of the door hinge plate 302 and the first hinge shaft sleeve 304 hitting the hinge shaft 303, reducing the impact damage to the hinge shaft 303. The side of the friction block 8 away from the hinge shaft 303 is located in the middle of the chamber 10, which indicates that a movable space is provided for the chamber 10, so that when the door hinge plate 302 and the first hinge shaft sleeve 304 collide toward the hinge shaft 303, the side of the chamber 10 away from the friction block 8 will not immediately collide with the friction block 8, so that the chamber 10 can first slide along the outer wall of the friction block 8 for a distance, which is convenient for deceleration through friction.

[0035] See Figure 6-Figure 7 The buffer mechanism also includes a plurality of friction strips 13 fixedly mounted on the inner wall of the chamber 10, and a plurality of strip-shaped slide grooves 9 are provided on the outer walls on both sides of the friction block 8. The strip-shaped slide grooves 9 correspond horizontally to the friction strips 13, and the strip-shaped slide grooves 9 are slidably connected to the friction strips 13.

[0036] When the chamber 10 slides along the outer wall of the friction block 8, the friction strip 13 will also slide along the strip groove 9 on the friction block 8. The sliding of the friction strip 13 and the strip groove 9 intensifies the friction between the friction block 8 and the chamber 10, further reducing the impact of the first hinge sleeve 304 on the hinge shaft 303.

[0037] See Figure 5 and Figure 7 A pressing plate 11 is provided in the chamber 10 , the outer wall of the pressing plate 11 is against the inner wall of the chamber 10 , and a plurality of springs 12 are fixedly connected between the outer wall of the pressing plate 11 and the inner wall of the chamber 10 .

[0038] When the chamber 10 moves from the side away from the friction block 8 to the side close to the friction block 8, the side of the friction block 8 away from the hinge shaft 303 will hit the pressing plate 11. The pressing plate 11 will be squeezed by the impact and multiple springs 12 will be squeezed. The springs 12 will then slow down the impact force and reduce damage to the door hinge plate 302 and the hinge shaft 303.

[0039] See Figure 3-Figure 5 The outer wall of the hinge shaft 303 is sleeved with two second hinge shaft sleeves 305, and the door frame hinge plate 301 is connected between the two second hinge shaft sleeves 305. The outer wall of the door frame hinge plate 301 is fixedly connected to the outer wall of the second hinge shaft sleeves 305, and the outer wall of the door frame hinge plate 301 is fixedly connected to the outer wall of the door frame body 2.

[0040] The door frame hinge plate 301 is fixed to the door frame body 2 by bolts, and then is sleeved on the hinge shaft 303 through the second hinge shaft sleeve 305. The door leaf hinge plate 302 is also sleeved on the hinge shaft 303 through the first hinge shaft sleeve 304. Therefore, when the fire door body 1 is opened and closed, the first hinge shaft sleeve 304 will rotate along the outer wall of the hinge shaft 303 to realize the opening and closing of the fire door body 1. The door frame hinge plate 301 and the second hinge shaft sleeve 305 are fixed by welding, and the door leaf hinge plate 302 and the first hinge shaft sleeve 304 are also fixed by welding.

[0041] See Figure 4 Both second hinge sleeves 305 are provided with a through hole 6, and an elastic roll 7 is arranged in the through hole 6. The fixed end of the elastic roll 7 is fixedly connected to the outer wall of the hinge shaft 303, and the free end of the elastic roll 7 is fixedly connected to the inner wall of the through hole 6. The inner wall of the second hinge sleeve 305 does not directly contact the outer wall of the hinge shaft 303.

[0042] The second hinge sleeve 305 is connected to the hinge shaft 303 by an elastic roll 7, which fills the through hole 6. When the hinge shaft 303 is hit, the hinge shaft 303 will move along the second hinge sleeve 305 and hit the elastic roll 7. The elastic roll 7 is made of elastic material and can be tightened and expanded. Therefore, when the hinge shaft 303 hits the second hinge sleeve 305, it will first hit the elastic roll 7, and then the elastic roll 7 can reduce this impact and improve the stability of the overall hinge body 3.

[0043] See Figure 3 and Figure 5 Two fixing plates 4 are fixedly installed on the outer wall of the hinge shaft 303, one of which is close to the top end of the hinge shaft 303, and its bottom is against the top end of the second hinge sleeve 305 above, and the other fixing plate 4 is close to the bottom end of the hinge shaft 303, and its top is fixed against the bottom end of the second hinge sleeve 305 below.

[0044] The fixing plate 4 is fixedly welded on the hinge shaft 303 , and the fixing plate 4 is supported on the two second hinge shaft sleeves 305 , thereby ensuring that the hinge shaft 303 will not fall out of the second hinge shaft sleeves 305 .

[0045] See Figure 3-Figure 5 The door frame hinge plate 301 is penetrated by a special-shaped opening 5 for the door leaf hinge plate 302 to enter, and the first hinge sleeve 304 is located between the two second hinge sleeves 305.

[0046] When the fire door body 1 is in the open state, the door leaf hinge plate 302 will move away from the special-shaped opening 5. When the fire door body 1 is in the closed state, the door leaf hinge plate 302 will enter the special-shaped opening 5, so that the door leaf hinge plate 302 and the door frame hinge plate 301 are vertical, so that the fire door body 1 and the door frame body 2 can be closed more tightly.

[0047] Working principle:

[0048] The hinge body 3 is fixed to the fire door body 1 via a door hinge plate 302. The door hinge plate 302 is fixed to the fire door body 1 via bolts. When the fire door body 1 is subjected to an impact force, the impact force is transmitted to the door hinge plate 302, and then transmitted to the first hinge sleeve 304 via the door hinge plate 302. Since there is a gap between the first hinge sleeve 304 and the hinge shaft 303, the first hinge sleeve 304 subjected to the impact force will move toward the hinge shaft 303.

[0049] As the distance between the first hinge sleeve 304 and the hinge shaft 303 continues to decrease until the first hinge sleeve 304 hits the hinge shaft 303, the impact force will be transmitted to the hinge shaft 303 instead of being directly transmitted to the entire hinge body 3. Then the buffer mechanism will slow down the force of the first hinge sleeve 304 hitting the hinge shaft 303, reducing the damage of the first hinge sleeve 304 to the hinge shaft 303. The distance between the first hinge sleeve 304 and the hinge shaft 303 provides a movable space for the fire door body 1 after it is subjected to impact force. When the fire door body 1 is subjected to unexpected impact force, if there is no such movable space, the hinge body 3 will be damaged instantly, causing the position of the fire door body 1 to shift or deform, affecting its closing sealing and stability. With this movable space and buffer mechanism, the fire door body 1 can still maintain a relatively stable position after being impacted.

[0050] When the door hinge plate 302 and the first hinge shaft sleeve 304 collide toward the hinge shaft 303, the chamber 10 in the door hinge plate 302 will slide along the outer wall of the friction block 8. The chamber 10 is in close contact with the outer wall of the friction block 8. Therefore, when the chamber 10 slides along the friction block 8, the door hinge plate 302 will generate friction with the friction block 8, thereby slowing down the impact speed of the door hinge plate 302 and the first hinge shaft sleeve 304 hitting the hinge shaft 303, reducing the impact damage to the hinge shaft 303. The side of the friction block 8 away from the hinge shaft 303 is located in the middle of the chamber 10, which indicates that a movable space is provided for the chamber 10, so that when the door hinge plate 302 and the first hinge shaft sleeve 304 collide toward the hinge shaft 303, the side of the chamber 10 away from the friction block 8 will not immediately collide with the friction block 8, so that the chamber 10 can first slide along the outer wall of the friction block 8 for a distance, which is convenient for deceleration through friction.

Claims

1. An explosion-proof and impact-resistant fire door, comprising a fire door body (1), fixed to a door frame body (2) by two hinge bodies (3), characterized in that: include, A hinge shaft (303) is provided between the fire door body (1) and the door frame body (2); The first hinge shaft sleeve (304) is sleeved on the hinge shaft (303) and is located in the middle of the hinge shaft (303). A cavity for the first hinge shaft sleeve (304) to move is reserved in the first hinge shaft sleeve (304). The outer wall of the first hinge shaft sleeve (304) is installed with a door leaf hinge plate (302) connected to the outer wall of the fire door body (1).

2. The explosion-resistant and impact-resistant fireproof door according to claim 1, characterized in that: A buffer mechanism is provided in the hinge body (3) for applying resistance to the force of the first hinge sleeve (304) hitting the hinge shaft (303) when the fire door body (1) is subjected to an impact force. The buffer mechanism includes a chamber (10) opened in the door hinge plate (302), the chamber (10) is communicated with the internal cavity of the first hinge sleeve (304), and a friction block (8) is installed on the outer wall of the hinge shaft (303). The friction block (8) extends into the chamber (10) and is slidably connected to the chamber (10). The outer wall of the friction block (8) is in close contact with the inner wall of the chamber (10), and the side of the friction block (8) away from the hinge shaft (303) is located in the middle of the chamber (10).

3. The explosion-resistant and impact-resistant fireproof door according to claim 2, characterized in that: The buffer mechanism further comprises a plurality of friction strips (13) mounted on the inner wall of the chamber (10), and a plurality of strip-shaped slide grooves (9) are provided on both outer walls of the friction block (8), the strip-shaped slide grooves (9) correspond horizontally to the friction strips (13), and the strip-shaped slide grooves (9) are slidably connected to the friction strips (13).

4. The explosion-resistant and impact-resistant fireproof door according to claim 3, characterized in that: A pressing plate (11) is provided in the chamber (10), the outer wall of the pressing plate (11) abuts against the inner wall of the chamber (10), and a plurality of springs (12) are connected between the outer wall of the pressing plate (11) and the inner wall of the chamber (10).

5. The explosion-resistant and impact-resistant fireproof door according to claim 1, characterized in that: The outer wall of the hinge shaft (303) is sleeved with two second hinge shaft sleeves (305), a door frame hinge plate (301) is connected between the two second hinge shaft sleeves (305), the outer wall of the door frame hinge plate (301) is connected to the outer wall of the second hinge shaft sleeves (305), and the outer wall of the door frame hinge plate (301) is connected to the outer wall of the door frame body (2).

6. The explosion-resistant and impact-resistant fireproof door according to claim 5, characterized in that: The two second hinge shaft sleeves (305) are both provided with a through hole (6), an elastic roll (7) is provided in the through hole (6), the fixed end of the elastic roll (7) is connected to the outer wall of the hinge shaft (303), and the free end of the elastic roll (7) is connected to the inner wall of the through hole (6), and the inner wall of the second hinge shaft sleeve (305) does not directly contact the outer wall of the hinge shaft (303).

7. The explosion-resistant and impact-resistant fireproof door according to claim 6, characterized in that: Two fixing plates (4) are installed on the outer wall of the hinge shaft (303), one of the fixing plates (4) is close to the top end of the hinge shaft (303), and its bottom is against the top end of the second hinge shaft sleeve (305) above, and the other fixing plate (4) is close to the bottom end of the hinge shaft (303), and its top is fixedly against the bottom end of the second hinge shaft sleeve (305) below.

8. The explosion-resistant and impact-resistant fireproof door according to claim 7, characterized in that: The door frame hinge plate (301) is provided with a special-shaped opening (5) for the door leaf hinge plate (302) to enter, and the first hinge shaft sleeve (304) is located between the two second hinge shaft sleeves (305).

Images