Fireproof door capable of locking open state

Abstract

The invention relates to the technical field of fire safety equipment, and discloses a fireproof door capable of locking an opening state, the fireproof door comprises a fixing frame, a fire monitor and a fireproof door, the fire monitor is arranged at the top of the fixing frame, the fireproof door is rotatably connected to the interior of the fixing frame, and an auxiliary opening assembly used for assisting in opening of the fireproof door is arranged at the bottom of the fixing frame; a reset assembly used for resetting the auxiliary opening assembly is arranged at the bottom of the fixing frame, a fire observation assembly used for conveniently observing the fire condition is arranged in the fireproof door, and through arrangement of the auxiliary opening and reset assembly, the situation that when a fire happens, the temperature of the fireproof door is too high, and people cannot normally touch and open the fireproof door is avoided; the fireproof door is simple in structure and convenient to use, the situation that special crowds such as the old and the young smoothly push the heavy fireproof door to escape when a fire occurs is avoided, the fireproof door adopts the design that the reset handle is pushed by feet, the hands are prevented from making contact with the surface of the high-temperature door, and escape safety and convenience are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of fire safety equipment, in particular to a fire door which can be locked in an open state. Background Art

[0002] A fire door is a door that, together with its frame, can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. It is usually composed of a door frame, door leaf, fire lock, fire hinge, fire glass, fire sealing strip, etc. In the event of a fire, it ensures that the evacuation route is unobstructed, facilitating the rapid evacuation of personnel.

[0003] Traditional fire doors have many disadvantages in practical applications, which will have a serious impact on people's life safety and property protection in an emergency. First, the fire detector can unlock the locked state of the traditional fire door after detecting a fire. The unlocked traditional fire door usually needs to be opened directly by hand. In the event of a fire, the surface of the door will heat up rapidly, making it impossible for the human body to directly touch and open it. This disadvantage greatly hinders people's escape route, especially when the fire is fierce and time is tight. People will fall into danger because they cannot open the fire door. In addition, for special groups such as the elderly and children, they have difficulty in pushing the heavy traditional fire door smoothly due to lack of strength, which further increases the difficulty of escape. Secondly, after an emergency opening, the traditional fire door will be damaged or cannot be reset normally, affecting its subsequent use. The lack of an effective reset mechanism makes the traditional fire door perform poorly when dealing with multiple emergencies, affecting the performance and safety of the fire door.

[0004] Secondly, traditional fire doors are completely closed, and people cannot observe the fire situation on the other side of the door. When a fire occurs, this closedness puts people in an information blind spot and cannot accurately judge the size, development trend and rescue progress of the fire. This greatly increases people's panic and uncertainty, and will cause people to make wrong decisions, such as blindly escaping or missing the best time to escape. For special groups such as the elderly and children, the psychological pressure brought by this uncertainty is even greater. At the same time, since it is impossible to observe the fire, people will take risky actions in an emergency because they do not understand the situation. For example, if the fire door is opened rashly without knowing the fire outside the door, the fire will spread rapidly or smoke will pour in, making the escape route more dangerous. At the same time, the lack of effective observation means of traditional fire doors also brings difficulties to firefighting and rescue. Firefighters cannot understand the internal situation of the fire scene in the first time, and it is difficult to formulate the most effective fire extinguishing and rescue plan, thereby reducing the rescue efficiency. Pure transparent insulating glass is more susceptible to high temperature, impact and other factors and breaks in a fire environment. Once the glass breaks, it will not only lose the function of observing the fire, but also may allow the fire and smoke to spread rapidly, posing a greater threat to personnel safety.

[0005] Therefore, it is necessary to provide a fire door that can be locked in an open state, aiming to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, an object of the present invention is to provide a fire door that can be locked in an open state.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fire door that can be locked in an open state, comprising a fixed frame, a fire detector and a fire door, wherein the fire detector is arranged at the top of the fixed frame, the fire door is rotatably connected to the inside of the fixed frame, an auxiliary opening component for assisting the opening of the fire door is arranged at the bottom of the fixed frame, a reset component for resetting the auxiliary opening component is arranged at the bottom of the fixed frame, and a fire observation component for facilitating the observation of the fire situation is arranged inside the fire door.

[0008] Preferably, the auxiliary opening component includes a positioning insulation block, which is fixedly connected to the bottom of the fixed frame, and one end of the positioning insulation block away from the fixed frame is fixedly connected to a sealing shell, and the inner wall of the sealing shell is fixedly connected to a positioning frame, and the top of the positioning frame is slidably connected to a disc-shaped impact column.

[0009] Preferably, the auxiliary opening component also includes a return spring, which is fixedly connected to the outer wall of the disc-shaped impact column, and one end of the return spring away from the disc-shaped impact column is fixedly connected to the positioning frame, and one end of the disc-shaped impact column away from the positioning frame is rotatably connected to a connecting rod, and one end of the connecting rod away from the disc-shaped impact column is rotatably connected to an L-shaped rotating rod.

[0010] Preferably, the reset assembly includes a cylindrical groove, which is opened at the bottom of the L-shaped rotating rod, the inside of the cylindrical groove is slidably connected to a limiting toothed disk, the bottom of the limiting toothed disk is fixedly connected to a reset handle, and the bottom of the positioning frame is rotatably connected to the limiting teeth.

[0011] Preferably, the fire observation assembly includes a rectangular positioning block group, which is fixedly connected to the inside of the fire door, and the outer wall of the rectangular positioning block group is slidably connected with four fan-shaped sealing plates distributed in a ring shape, and the four fan-shaped sealing plates are fixedly connected with a connecting block group on one side away from the rectangular positioning block group.

[0012] Preferably, the fire observation assembly includes an arc groove disk, which is slidably connected to the outer wall of the connecting block group, and the interior of the fixed frame is rotatably connected to a rotating button and a trigger toothed disk, and the trigger toothed disk is fixedly connected to the outer wall of the rotating button.

[0013] Preferably, the reset handle is slidably connected to the bottom of the sealing shell, and a torsion spring is provided between the limiting tooth and the positioning frame.

[0014] Preferably, the arc slot disk is rotatably connected to the interior of the fixed frame, and the trigger toothed disk is meshed with the arc slot disk.

[0015] Preferably, fireproof glass is arranged inside the fireproof door, and the fire observation assembly is arranged inside the fireproof glass of the fireproof door.

[0016] The present invention provides a fire door that can be locked in an open state. Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the setting of auxiliary opening and reset components, when a fire occurs, the fire will rapidly heat up the surface of the fire door, and the human body cannot directly open the fire door for escape. People only need to push the reset handle with their feet to make the reset handle drive the limit tooth plate to rise. Finally, the limit tooth plate loses the resistance of the limit teeth, so that the reset spring loses its restriction and drives the disc-shaped impact column to quickly hit the fire door, thereby achieving the purpose of opening the fire door. This avoids the situation that the fire door is too hot and people cannot touch it normally to open it when a fire occurs, and avoids the situation that special groups such as the elderly and children can smoothly push the heavy fire door to escape when a fire occurs. The design of the foot-pushing reset handle of this fire door avoids the contact between the hand and the high-temperature door surface, greatly improving the safety and convenience of escape;

[0018] Secondly, compared with traditional fire doors, the elderly and children with limited mobility cannot push the heavy traditional fire doors smoothly in an emergency, but this component only needs to push the reset handle with the foot, which is simpler and more labor-saving to operate, providing them with a more reliable escape route;

[0019] Secondly, people can turn the reset handle to make the disc-shaped impact column compress the reset spring again, which makes it easier to open the fire door again. Finally, by turning the reset handle, the limit tooth plate can be driven to slide, so that the limit tooth can limit the position of the disc-shaped impact column again through the limit tooth plate. Compared with traditional fire doors, this reusable feature greatly improves the reliability and durability of fire doors, reduces maintenance costs and replacement frequency. At the same time, the precise reset and limitation functions ensure that the performance of the fire door is always in the best condition, thereby improving the safety and effectiveness of the fire door.

[0020] 2. Through the setting of the fire observation component, after people turn the rotary button and the trigger toothed disc, the trigger toothed disc will drive the arc groove disc to rotate, thereby achieving the purpose of moving the fan-shaped sealing plate, so that people can observe the fire on the other side through the fireproof glass of the fire door by turning the rotary button. Compared with traditional fire doors, traditional fire doors are usually completely closed structures, and people cannot directly observe the fire situation on the other side of the door. In an emergency, unclear development of the fire will increase people's panic and uncertainty. The above-mentioned fire door drives the trigger toothed disc and the arc groove disc to rotate by turning the rotary button, thereby moving the fan-shaped sealing plate, so that people can observe the fire on the other side through the fireproof glass of the fire door. This design allows people to understand the dynamics of the fire in time during the process of taking refuge or waiting for rescue, make better decisions, and improve the ability to deal with emergencies;

[0021] At the same time, firefighters can also understand the internal fire situation through the observation window of the fire door, formulate more effective fire extinguishing and rescue plans, and improve rescue efficiency. In the case of traditional fire doors that cannot be observed, people will make wrong decisions due to lack of understanding of the fire situation, such as opening the door too early to cause the fire to spread or smoke to pour in. The observation function of the fire door can help people avoid these unexpected risks and improve the safety of escape;

[0022] At the same time, because transparent insulating glass is usually fixed and cannot provide additional protection like mechanical structures, in a fire, flying sparks, burning materials, etc. will hit the glass, increasing the risk of damage to the glass. Components such as fan-shaped sealing plates and trigger gear plates in the mechanical structure can provide additional protection for fire-resistant glass. In a fire, even if the glass is subjected to a certain degree of impact or high temperature, the fan-shaped sealing plate can also block the fire and smoke and reduce harm to personnel. The above-mentioned device avoids the occurrence of such problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the position relationship of the overall device of the present invention;

[0024] Figure 2 It is a schematic diagram of the position relationship of the fixing frame, fire door and fire observation assembly of the present invention;

[0025] Figure 3 It is a schematic diagram of the positional relationship among the fixing frame, the fire door, the auxiliary opening assembly and the reset assembly of the present invention;

[0026] Figure 4 This is a schematic diagram of the positional relationship between the auxiliary opening component and the reset component of the present invention;

[0027] Figure 5 For the present invention Figure 4 A magnified view of the structure at center;

[0028] Figure 6 It is a schematic diagram of the position relationship between the L-shaped rotating rod and the reset assembly of the present invention;

[0029] Figure 7 A schematic diagram of the positional relationship between the fire door and the fire observation assembly of the present invention;

[0030] Figure 8 A schematic diagram of the position relationship of the fire observation components of the present invention;

[0031] Fig. 9 It is a schematic diagram of the position relationship of the fan-shaped sealing plate, the connecting block group, and the arc slot plate of the present invention;

[0032] Fig.10 For the present invention Fig. 9 A magnified view of the structure at B in the middle;

[0033] Fig.11 This is a schematic diagram of the positional relationship between the rotary button and the trigger toothed disc of the present invention.

[0034] Reference numerals: 11, fixing frame; 12, fire detector; 13, fire door;

[0035] The auxiliary opening assembly includes: 21, a positioning heat insulation block; 22, a sealing shell; 23, a positioning frame; 24, a disc-shaped impact column; 25, a return spring; 26, a connecting rod; 27, an L-shaped rotating rod;

[0036] The reset assembly includes: 31, a columnar groove; 32, a limit tooth plate; 33, a reset handle; 34, a limit tooth;

[0037] The fire observation assembly includes: 41, a rectangular positioning block group; 42, a fan-shaped sealing plate; 43, a connecting block group; 44, an arc groove plate; 45, a rotating button; 46, a trigger gear plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] In the description of the present invention, the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0040] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0041] Implementation example Figures 1 to 11 As shown, a fire door in a lockable open state is provided in one embodiment of the present invention, comprising a fixed frame 11, a fire detector 12 and a fire door 13. The fire detector 12 is arranged on the top of the fixed frame 11, and the fire door 13 is rotatably connected to the inside of the fixed frame 11. An auxiliary opening component for assisting the opening of the fire door 13 is arranged at the bottom of the fixed frame 11, a reset component for resetting the auxiliary opening component is arranged at the bottom of the fixed frame 11, and a fire observation component for facilitating the observation of the fire condition is arranged inside the fire door 13.

[0042] The auxiliary opening component includes a positioning insulation block 21, which is fixedly connected to the bottom of the fixed frame 11, and one end of the positioning insulation block 21 away from the fixed frame 11 is fixedly connected to a sealing shell 22, and the inner wall of the sealing shell 22 is fixedly connected to a positioning frame 23, and the top of the positioning frame 23 is slidably connected to a disc-shaped impact column 24.

[0043] The auxiliary opening assembly also includes a return spring 25, which is fixedly connected to the outer wall of the disc-shaped impact column 24. The end of the return spring 25 away from the disc-shaped impact column 24 is fixedly connected to the positioning frame 23. The end of the disc-shaped impact column 24 away from the positioning frame 23 is rotatably connected to a connecting rod 26, and the end of the connecting rod 26 away from the disc-shaped impact column 24 is rotatably connected to an L-shaped rotating rod 27.

[0044] The reset assembly includes a cylindrical groove 31, which is opened at the bottom of the L-shaped rotating rod 27. The inside of the cylindrical groove 31 is slidably connected to a limit toothed disc 32. The bottom of the limit toothed disc 32 is fixedly connected to a reset handle 33, and the bottom of the positioning frame 23 is rotatably connected to a limit tooth 34.

[0045] The fire observation assembly includes a rectangular positioning block group 41, which is fixedly connected to the inside of the fire door 13. The outer wall of the rectangular positioning block group 41 is slidably connected with four fan-shaped sealing plates 42 in a ring-shaped distribution, and the four fan-shaped sealing plates 42 are fixedly connected with a connecting block group 43 on one side away from the rectangular positioning block group 41.

[0046] The fire observation assembly includes an arc groove plate 44, which is slidably connected to the outer wall of the connecting block group 43. The interior of the fixed frame 11 is rotatably connected to a rotating button 45 and a trigger toothed plate 46, and the trigger toothed plate 46 is fixedly connected to the outer wall of the rotating button 45.

[0047] The reset handle 33 is slidably connected to the bottom of the sealing shell 22 , so that people can push the reset handle 33 . A torsion spring is provided between the limiting tooth 34 and the positioning frame 23 , so that the limiting tooth 34 can easily resist the limiting toothed disc 32 .

[0048] The arc slot disk 44 is rotatably connected to the interior of the fixed frame 11 , and the trigger toothed disk 46 is meshed with the arc slot disk 44 , so that people can drive the trigger toothed disk 46 to mesh with the arc slot disk 44 by rotating the button 45 .

[0049] The fireproof door 13 is provided with fireproof glass inside, and the fire observation assembly is arranged inside the fireproof glass of the fireproof door 13, so that the fire situation can be observed through the fireproof glass of the fireproof door 13 when the fan-shaped sealing plate 42 is dispersed.

[0050] Working principle: In the initial state, the disc-shaped impact column 24 is parallel to the connecting rod 26, the reset spring 25 is compressed, the limiting tooth 34 is in conflict with the limiting toothed disc 32, the limiting toothed disc 32 is located at the bottom of the columnar groove 31, and the four fan-shaped sealing plates 42 are in conflict.

[0051] During operation, if a fire occurs, the fire detector 12 will quickly release the lock state of the fire door 13;

[0052] Then, the fire will rapidly heat up the surface of the fire door 13, and the human body cannot directly open the fire door 13 to escape. Instead, people push the reset handle 33 with their feet, and then the reset handle 33 drives the limit tooth plate 32 to rise. During the rising process, the limit tooth plate 32 will slide along the inside of the columnar groove 31, and the limit tooth plate 32 will gradually lose the resistance of the limit teeth 34. Then, at this time, the L-shaped rotating rod 27 and the limit tooth plate 32 lose the restriction and can rotate. Then, the compressed reset spring 25 quickly elastically stretches to push the disc-shaped impact column 24 to slide.

[0053] During the movement of the disc-shaped impact column 24, the L-shaped rotating rod 27 is driven to rotate through the connecting rod 26, and the L-shaped rotating rod 27 moving laterally will synchronously drive the limiting toothed disc 32 at the bottom to rotate;

[0054] When the reset spring 25 quickly elastically stretches to push the disc-shaped impact column 24 to slide, the disc-shaped impact column 24 will quickly hit the fire door 13, causing the fire door 13 to rotate around the fixed frame 11, thereby preventing the fire door 13 from being too hot and unable to be opened normally when a fire occurs, and preventing special groups such as the elderly and children from smoothly pushing the heavy fire door 13 to escape when a fire occurs. The design of the foot-pushing reset handle 33 of the fire door 13 avoids contact between the hand and the high-temperature door surface, greatly improving the safety and convenience of escape;

[0055] Secondly, compared with the traditional fire door 13, for special groups such as the elderly and children with limited mobility, they cannot smoothly push the heavy traditional fire door 13 in an emergency, but the assembly only needs to push the reset handle 33 with the foot, which is simpler and more labor-saving to operate, providing them with a more reliable escape route;

[0056] Secondly, people can first pull the reset handle 33 to reset, and then rotate the reset handle 33 in the opposite direction. The reset handle 33 pulls the disc-shaped impact column 24 to move through the L-shaped rotating rod 27 and the connecting rod 26, so that the disc-shaped impact column 24 compresses the reset spring 25 again. Since a torsion spring is arranged between the limiting tooth 34 and the positioning frame 23, when the person rotates the reset handle 33, the limiting tooth 34 continues to resist the limiting tooth plate 32, so that the disc-shaped impact column 24 gradually compresses and accumulates force on the reset spring 25, so as to facilitate the subsequent opening of the fire door 13 again. The limiting tooth 34 continues to resist the limiting tooth plate 32 to prevent the limiting tooth plate 32 from rotating and releasing the elastic force of the reset spring 25 in advance. The limiting function ensures that the performance of the fire door 13 is always in the best state, thereby improving the safety and effectiveness of the fire door 13.

[0057] Because the traditional fire door 13 is usually a completely closed structure, people cannot directly observe the fire situation on the other side of the door. In an emergency, the unclear development trend of the fire will increase people's panic and uncertainty. The setting of this structure can drive the trigger toothed disc 46 to rotate by rotating the rotating button 45. Because the trigger toothed disc 46 is meshed with the arc groove disc 44, the arc groove disc 44 will be driven to rotate during the rotation of the trigger toothed disc 46.

[0058] Then, the arc groove plate 44 will drive the connecting block group 43 to slide during the rotation process, and the connecting block group 43 will drive the four fan-shaped sealing plates 42 to slide and separate along the rectangular positioning block group 41, so that personnel can observe the fire through the fireproof glass of the fire door 13;

[0059] At the same time, in contrast to the above movement process, when the staff member rotates the rotary button 45 in the reverse direction, the rotary button 45 drives the trigger toothed disc 46 to rotate in the reverse direction, and the reversely rotating trigger toothed disc 46 drives the arc groove disc 44 to rotate during the rotation process, thereby causing the connecting block group 43 to drive the four fan-shaped sealing plates 42 to merge along the rectangular positioning block group 41, and finally achieve the purpose of closing the observation window. Compared with the traditional fire door 13, the above fire door 13 drives the trigger toothed disc 46 and the arc groove disc 44 to rotate by rotating the rotary button 45, thereby moving the fan-shaped sealing plate 42, so that people can observe the fire on the other side through the fireproof glass of the fire door 13. This design allows people to understand the dynamics of the fire in a timely manner during the process of taking refuge or waiting for rescue, make better decisions, and improve the ability to respond to emergencies;

[0060] At the same time, firefighters can also understand the internal fire situation through the observation window of the fire door 13, formulate more effective fire extinguishing and rescue plans, and improve rescue efficiency. In the case where the traditional fire door 13 cannot be observed, people will make wrong decisions due to lack of understanding of the fire situation, such as opening the door too early to cause the fire to spread or smoke to pour in. The observation function of the fire door 13 can help people avoid these unexpected risks and improve the safety of escape;

[0061] At the same time, simple transparent insulating glass is more susceptible to breakage due to factors such as high temperature and impact in a fire environment. Once the glass breaks, it will not only lose the function of observing the fire, but also allow the fire and smoke to spread rapidly, posing a greater threat to personnel safety. Because transparent insulating glass is usually fixedly installed and cannot provide additional protection like mechanical structures, in a fire, flying sparks, burning materials, etc. will hit the glass, increasing the risk of damage to the glass. The above-mentioned device avoids the occurrence of such problems.

[0062] For those skilled in the art, although several embodiments and examples of the present invention are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fire door capable of being locked in an open state, comprising a fixed frame (11), a fire detector (12) and a fire door (13), wherein the fire detector (12) is arranged on the top of the fixed frame (11), and the fire door (13) is rotatably connected to the inside of the fixed frame (11), characterized in that: An auxiliary opening component for assisting the opening of the fire door (13) is arranged at the bottom of the fixed frame (11), a reset component for resetting the auxiliary opening component is arranged at the bottom of the fixed frame (11), and a fire observation component for facilitating the observation of the fire condition is arranged inside the fire door (13).

2. A fire door that can be locked in an open state according to claim 1, characterized in that: The auxiliary opening component comprises a positioning heat-insulating block (21), the positioning heat-insulating block (21) is fixedly connected to the bottom of the fixed frame (11), one end of the positioning heat-insulating block (21) away from the fixed frame (11) is fixedly connected to a sealing shell (22), the inner wall of the sealing shell (22) is fixedly connected to a positioning frame (23), and the top of the positioning frame (23) is slidably connected to a disc-shaped impact column (24).

3. A fire door that can be locked in an open state according to claim 2, characterized in that: The auxiliary opening assembly also includes a return spring (25), the return spring (25) is fixedly connected to the outer wall of the disc-shaped impact column (24), one end of the return spring (25) away from the disc-shaped impact column (24) is fixedly connected to the positioning frame (23), one end of the disc-shaped impact column (24) away from the positioning frame (23) is rotatably connected to a connecting rod (26), and one end of the connecting rod (26) away from the disc-shaped impact column (24) is rotatably connected to an L-shaped rotating rod (27).

4. A fire door that can be locked in an open state according to claim 3, characterized in that: The reset assembly comprises a columnar groove (31), the columnar groove (31) is opened at the bottom of the L-shaped rotating rod (27), the interior of the columnar groove (31) is slidably connected to a limit toothed disc (32), the bottom of the limit toothed disc (32) is fixedly connected to a reset handle (33), and the bottom of the positioning frame (23) is rotatably connected to the limit tooth (34).

5. A fire door that can be locked in an open state according to claim 1, characterized in that: The fire observation assembly comprises a rectangular positioning block group (41), wherein the rectangular positioning block group (41) is fixedly connected to the inside of the fire door (13), and the outer wall of the rectangular positioning block group (41) is slidably connected to four fan-shaped sealing plates (42) in an annular distribution, and the four fan-shaped sealing plates (42) are fixedly connected to a connecting block group (43) on one side away from the rectangular positioning block group (41).

6. A fire door that can be locked in an open state according to claim 5, characterized in that: The fire observation assembly comprises an arc groove disk (44), the arc groove disk (44) is slidably connected to the outer wall of the connecting block group (43), the interior of the fixed frame (11) is rotatably connected to a rotating button (45) and a trigger toothed disk (46), and the trigger toothed disk (46) is fixedly connected to the outer wall of the rotating button (45).

7. A fire door that can be locked in an open state according to claim 4, characterized in that: The reset handle (33) is slidably connected to the bottom of the sealing shell (22), and a torsion spring is arranged between the limiting tooth (34) and the positioning frame (23).

8. A fire door that can be locked in an open state according to claim 6, characterized in that: The arc slot disk (44) is rotatably connected to the interior of the fixed frame (11), and the trigger toothed disk (46) is meshed with the arc slot disk (44).

9. A fire door that can be locked in an open state according to claim 1, characterized in that: The fireproof door (13) is provided with fireproof glass inside, and the fire observation component is arranged inside the fireproof glass of the fireproof door (13).

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