Emergency opening structure and method of fireproof door

Abstract

The invention relates to the technical field of fireproof doors, in particular to an emergency opening structure and method of a fireproof door, the emergency opening structure comprises a bottom pile frame and two door plates, the bottom pile frame is located below the door plates, shaft barrels are fixed to the ends, away from each other, of the two door plates, and rotatable shaft column structures are arranged on the inner sides of the shaft barrels; the lower end of the shaft column structure is installed on the upper surface of the bottom pile frame, the shaft column structure comprises a plurality of axial pressure supply structures, the axial pressure supply structures are arranged on the inner side of the shaft barrel and comprise column rods and air pressure mechanisms, the column rods and the air pressure mechanisms are rotationally arranged on the inner side of the shaft barrel in an air sealing mode, and vertical grooves are formed in the circumferential side faces of the column rods. A person passing through a first position only needs to open the door plate by a maximum angle to drive the vertical hole in the rear side to communicate with the vent hole in the rear side, and the air pressure mechanism inflates air pressure to the rear side of the stress shifting plate through the vent hole in the rear side and the vertical hole in the rear side, so that the door plate has an opening tendency, and the door plate does not hinder the passing person.

Description

Technical Field

[0001] The present invention relates to the technical field of fire doors, and in particular to an emergency opening structure and method for fire doors. Background Art

[0002] Fire doors are doors that meet fire resistance stability, integrity, and thermal insulation requirements for a specified period of time. They are fireproof partitions with a certain degree of fire resistance, installed between fire compartments, evacuation stairwells, vertical shafts, and other structures. In addition to functioning as ordinary doors, fire doors also prevent the spread of fire and smoke, effectively preventing the spread of fire for a specified period of time. Fire doors are generally equipped with a door closer, which automatically pushes the fire door closed when opened.

[0003] Chinese patent CN114396220B discloses an emergency opening structure for a fire door, which relates to the technical field of fire doors and includes a door frame, an inner surface of the door frame being movably connected to a door leaf, a top of the door leaf being fixedly connected to a door closer, the other end of the door closer being fixedly connected to the top of the door frame, an outer surface of the door leaf being fixedly connected to an opening frame, a fire lock being provided on the top of the opening frame, an output end of the fire lock extending to the interior of the door frame, and a first sliding groove being provided on one side of the opening frame. The invention adopts the combination of buffer blocks and sound-absorbing channels. When the fire door is closed, the buffer blocks reduce the impact force of the door leaf when closing, reducing noise. Part of the noise is reduced by the sound-dividing plate, and the other part is absorbed by the sound-absorbing channel. The remaining noise is fully absorbed by the sound-absorbing cotton, which solves the problem that the fire door generates noise during the opening and closing process, which causes trouble to people, and achieves the effect of reducing noise. The above-mentioned related technologies have the following defects: when multiple people need to pass through in the event of a fire, the automatically closed fire door in the existing technology will hinder the speed of people passing through, and by setting an open fastening structure, a large amount of smoke will be accompanied by a fire, which is inconvenient for people to operate and fasten. At the same time, people are more nervous and inconvenient to operate in the event of a fire. For this reason, an emergency opening structure and method for fire doors are proposed. Summary of the Invention

[0004] In order to facilitate the passage of people through a fire by keeping the fire door in an open state and allowing multiple people to pass quickly, the present invention provides an emergency opening structure and method for the fire door.

[0005] The present invention provides an emergency opening structure and method for a fire door, which adopts the following technical solution: it includes a bottom pile frame and two door panels, the bottom pile frame is located below the door panels, and the two door panels are fixed with a shaft cylinder at one end away from each other, and a rotatable shaft column structure is provided on the inner side of the shaft cylinder, and the lower end of the shaft column structure is installed on the upper surface of the bottom pile frame.

[0006] The shaft column structure includes a plurality of axial pressure supply structures, and the axial pressure supply structures are arranged on the inner side of the shaft cylinder.

[0007] The axial pressure supply structure includes a column and a pneumatic mechanism. The column and the pneumatic mechanism are arranged on the inner side of the shaft tube in an airtight and rotatable manner. A vertical groove is provided on the circumferential side of the column. The shaft tube is located inside the vertical groove and a force-bearing plate is fixed thereon. A linkage ring frame is rotatably inserted into the top wall of the vertical groove. The linkage ring frame has two vertical holes that pass through the upper and lower parts. Two air vents are provided on the bottom surface of the upper end of the column, and the air pressure mechanism inflates the air holes.

[0008] The bottom pile frame is fixed to the lower end of the adjacent column, and the pneumatic mechanism is coaxially installed with the adjacent column.

[0009] Optionally, the pneumatic mechanism includes a single-head end tube and a pneumatic pressure plate, the lower end of the single-head end tube is open, the upper end of the single-head end tube is closed, the upper end of the vent is connected to the interior of the single-head end tube, the pneumatic pressure plate is elastically slidably inserted into the outer surface of the single-head end tube, and the single-head end tube is fixed to the adjacent column rod.

[0010] Optionally, the linkage ring frame includes a ring plate and two linkage plates, the two linkage plates are located inside the corresponding vertical grooves, the force-bearing shift plates inside the corresponding vertical grooves are located between the two linkage plates, the upper ends of the linkage plates are fixed to the ring plates, vertical holes are opened through the end faces of the ring plates, and the ring plates are coaxially rotated and inserted inside the column rods.

[0011] Optionally, the distance between the axis of the vertical hole and the axis of the column is equal to the distance between the vent hole and the axis of the column, and two vertical inner walls of the vertical groove are provided with inner grooves adapted to the linkage plate.

[0012] Optionally, an air supply pipe is installed through the axis of the single-head end tube, the column rod is fixedly sleeved on the outer surface of the air supply pipe, the air pressure plate is slidably sleeved on the outer surface of the air supply pipe, the air supply pipe is located inside the single-head end tube and an air supply hole is opened, the air supply hole is located below the air pressure plate on the inner side of the same single-head end tube, the air supply hole is close to the column rod on the adjacent lower side, an arc block is coaxially fixed on the upper end of the shaft tube, an air supply plate is rotatably arranged on the inner ring side of the arc block, the lower end of the air supply plate is fixed to the upper end of the adjacent single-head end tube, the circumference of the air supply plate is concave away from the side of the arc block, and a movable groove is opened on the other side of the circumference of the air supply plate, a transmission plate is slidably inserted inside the movable groove, the transmission plate is fixed to the arc block, and the air supply plate is connected and installed with the upper end of the air supply pipe.

[0013] Optionally, two arc cavities and an axial cavity are provided on the inner side of the air supply disk. The axial cavity is connected to the inside of the air supply pipe. The axial cavity is located between the two arc cavities. The axial cavity is connected to the two arc cavities. An extended arc plate is installed at the connection between the arc cavity and the axial cavity. An arc rod slides through the movable groove. The transmission plate is fixedly sleeved on the outer surface of the arc rod. An air supply plate is slidably inserted into the inside of the arc cavity. The two ends of the arc rod are respectively fixed to the two air supply plates, and the air supply plate is in sliding contact with the adjacent extended arc plates.

[0014] Optionally, a partition is fixedly inserted at the axis of the shaft cavity, and a one-way valve A is installed on both sides of the upper end of the air supply pipe to limit the one-way air flow into the air supply pipe. A one-way valve B is installed through the side of the air supply plate to limit the one-way air flow away from the arc rod side. A one-way valve C is installed through the inner wall of the arc cavity away from the arc rod to limit the one-way air flow into the arc cavity. A pressure valve is installed through the inner wall of the arc cavity away from the arc rod.

[0015] Optionally, the inner ring surface of the ring plate is provided with tooth grooves distributed in an annular shape, the inner ring side of the ring plate is engaged with a damping tooth block, the damping tooth block is engaged with the adjacent tooth grooves, the damping tooth block is slidably inserted into the column rod, and the damping tooth block is elastically connected to the column rod.

[0016] Optionally, the extended arc plate is an arc structure coaxial with the column rod, the arc angle of the extended arc plate is smaller than the arc angle at the connection between the arc cavity and the shaft cavity, and a gap is formed between the end of the extended arc plate away from the transmission plate and the inner wall of the arc cavity.

[0017] The method of using a fire door includes the following steps: S1. When the two door panels are in a closed state, the vertical hole on the front side of the linkage ring frame end surface is connected to the vent hole on the front side, and the vertical hole on the rear side is misaligned with the vent hole on the rear side.

[0018] S2. The air pressure mechanism fills the front side of the force-receiving shift plate with air pressure through the connected vent holes and vertical holes. The air pressure pushes the force-receiving shift plate through the shaft tube, which has the tendency to drive the door panel to close.

[0019] S3. After the door panel is pushed open at a small angle and a person passes through, the door panel will automatically close under the push of air pressure.

[0020] S4. When a fire occurs and a large number of people need to pass through, the people passing through push the door panel to rotate to the maximum angle. When the door panel rotates, it drives the force-bearing shift plate through the shaft tube to apply thrust to the linkage ring frame.

[0021] S5. When the linkage ring frame rotates, the vertical hole on the front side is misaligned with the front vent hole, and then the vertical hole on the rear side is connected with the rear vent hole. The air pressure mechanism fills the rear side of the force-bearing shift plate with air pressure through the rear vent hole and the rear vertical hole, so that the door panel has a tendency to open, allowing multiple people to pass through quickly.

[0022] In summary, the present invention has the following beneficial technical effects: The present invention is provided with components such as vertical holes, ventilation holes, linkage ring frames and force-receiving plates. In case of fire, when the vision is unclear, the first person passing through only needs to open the door panel to the maximum angle, and the door panel drives the force-receiving plate to move to the front side of the vertical groove. When the force-receiving plate moves to the front side, it pushes the linkage ring frame to rotate. After the linkage ring frame rotates, it drives the vertical hole on the front side to be misaligned with the ventilation hole on the front side, and at the same time drives the vertical hole on the rear side to be connected with the ventilation hole on the rear side. The air pressure mechanism fills the rear side of the force-receiving plate with air pressure through the ventilation hole on the rear side and the vertical hole on the rear side, so that the door panel has a tendency to open, and the door panel does not cause any obstruction to the people passing through. The present invention provides components such as an air supply pipe, an air supply plate, and a transmission plate. When the door panel reciprocates and closes, the arc block and the transmission plate are driven to rotate synchronously through the shaft tube. When the transmission plate moves, the arc rod drives the two air supply plates to move in the two arc cavities respectively. At the same time, when the air supply plate moves at the corresponding extended arc plate position, it pushes the air flow through the one-way valve A to enter the air supply pipe in one direction, so as to replenish air below the air pressure plate in the single-head end tube, thereby preventing the air pressure on the lower side of the air pressure plate from decreasing as the use time increases, thereby reducing the pushing effect on the door panel. The present invention provides components such as tooth grooves and damping tooth blocks. When the force-bearing plate drives the ring plate to rotate by pushing the linkage plate, the ring plate continuously pushes the damping tooth block to slide in the column rod through the tooth grooves. When the force-bearing plate disengages the force applied to the linkage plate, the damping tooth block engages with the tooth groove under the elastic connection with the ring column, positioning the angle of the ring plate so that the vertical hole can be connected to the corresponding vent hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic structural diagram of the connection between the shaft cylinder and the shaft column structure in an embodiment of the present invention; Figure 3 This is a structural diagram of the connection between the shaft cylinder and the axial pressure supply structure in an embodiment of the present invention; Figure 4 2 is a schematic structural diagram of the connection between the column and the pneumatic mechanism in an embodiment of the present invention; Figure 5 This is a schematic structural diagram of the connection between a single-head end tube and an air pressure plate in an embodiment of the present invention; Figure 6 In the embodiment of the present invention Figure 4 A schematic diagram of the structure at center A; Figure 7 is a schematic top view of part of the structure in an embodiment of the present invention; Figure 8 2. It is a schematic structural diagram of the connection between the tooth socket and the damping tooth block in an embodiment of the present invention; Figure 9 Is a partial structure of the embodiment of the present invention is a schematic diagram of the scattered; Figure 10 In the embodiment of the present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0024] Reference numerals: 1, bottom pile frame; 2, door panel; 3, shaft cylinder; 4, shaft column structure; 41, axial pressure supply structure; 411, column rod; 412, air pressure mechanism; 4121, single-end end cylinder; 4122, air pressure plate; 4123, air supply pipe; 4124, air supply hole; 4125, arc block; 4126, air supply plate; 4127, transmission plate; 4128, movable groove; 413, vertical groove; 41 4. Force-bearing shift plate; 415. Linkage ring frame; 4151. Ring plate; 4152. Linkage plate; 4153. Inner groove; 416. Vertical hole; 417. Vent hole; 5. Arc cavity; 6. Axial cavity; 7. Extended arc plate; 8. Arc rod; 9. Air supply plate; 10. Partition plate; 11. One-way valve A; 12. One-way valve B; 13. One-way valve C; 14. Pressure valve; 15. Tooth socket; 16. Damping tooth block. DETAILED DESCRIPTION

[0025] The following is combined with Figures 1-10 The present invention is described in further detail.

[0026] The embodiment of the present invention discloses a structure and method for emergency opening of a fire door. Figures 1-10 As shown, it includes a bottom pile frame 1 and two door panels 2. The bottom pile frame 1 is located below the door panels 2. The two door panels 2 are fixed with a shaft cylinder 3 at one end away from each other. A rotatable shaft column structure 4 is provided on the inner side of the shaft cylinder 3. The shaft cylinder 3 can rotate coaxially on the surface of the shaft column structure 4. The lower end of the shaft column structure 4 is installed on the upper surface of the bottom pile frame 1.

[0027] The shaft column structure 4 includes a plurality of axial pressure supply structures 41 , and the axial pressure supply structures 41 are arranged inside the shaft cylinder 3 .

[0028] The axial pressure supply structure 41 includes a column rod 411 and a pneumatic mechanism 412. The column rod 411 and the pneumatic mechanism 412 are airtightly rotatably arranged on the inner side of the shaft tube 3. A vertical groove 413 is opened on the circumferential side of the column rod 411. The shaft tube 3 is located inside the vertical groove 413 and a force-bearing plate 414 is fixed thereon. When the door panel 2 is closed, the force-bearing plate 414 is driven by the shaft tube 3 to contact the rear inner wall of the vertical groove 413. When the door panel 2 is opened to the maximum angle, the force-bearing plate 414 is driven to contact the front inner wall of the vertical groove 413.

[0029] A linkage ring frame 415 is rotatably inserted into the top wall of the vertical groove 413. The linkage ring frame 415 is provided with two vertical holes 416 that pass through the top and bottom. Two ventilation holes 417 are provided on the bottom surface of the upper end of the column 411. The linkage ring frame 415 includes a ring plate 4151 and two linkage plates 4152. The two linkage plates 4152 are located in the corresponding vertical groove 413. The force-bearing plate 414 in the corresponding vertical groove 413 is located between the two linkage plates 4152. The upper end of the linkage plate 4152 is fixed to the ring plate 4151. The distance between the axis of the vertical hole 416 and the axis of the column 411 is equal to the distance between the axis of the ventilation hole 417 and the axis of the column 411. The two vertical inner walls of the vertical groove 413 are provided with inner grooves 4153 that are compatible with the linkage plates 4152. When the force-bearing plate 414 contacts the inner wall of the front side of the vertical groove 413, The front linkage plate 4152 is pushed to be located in the front inner groove 4153. When the force-receiving plate 414 contacts the inner wall of the rear side of the vertical groove 413, the rear linkage plate 4152 is pushed to be located in the rear inner groove 4153. When the front linkage plate 4152 is located inside the front inner groove 4153, the rear vertical hole 416 is connected with the rear vent hole 417. The air pressure applies a thrust to the rear side of the force-receiving plate 414, which has a tendency to push the door panel 2 to open. When the rear linkage plate 4152 is located inside the rear inner groove 4153, the front vertical hole 416 is connected with the front vent hole 417. The air pressure applies a thrust to the front side of the force-receiving plate 414, which has a tendency to push the door panel 2 to close. When the linkage ring frame 415 rotates, the vertical hole 416 and the vent hole 417 can be connected.

[0030] The vertical hole 416 is formed through the end surface of the ring plate 4151, and the ring plate 4151 is coaxially rotated and inserted into the interior of the column 411. The inner ring surface of the ring plate 4151 is provided with an annular tooth groove 15. The inner ring side of the ring plate 4151 is engaged with a damping tooth block 16. The damping tooth block 16 is engaged with the adjacent tooth groove 15. The damping tooth block 16 is slidably inserted into the interior of the column 411. The damping tooth block 16 is elastically connected to the column 411. The damping tooth block 16 is connected to the column 411. 1 is elastically connected through elastic parts such as springs, which have a tendency to push the damping tooth block 16 to engage with the tooth groove 15. The meshing ends of the damping tooth block 16 and the tooth groove 15 are isosceles triangles. When the force-bearing shift plate 414 applies a thrust to the linkage plate 4152, driving the ring plate 4151 to rotate, the damping tooth block 16 is continuously misaligned with the tooth groove 15, and the damping of the damping tooth block 16 on the ring plate 4151 is less than the thrust applied by the air pressure to the force-bearing shift plate 414.

[0031] The air pressure mechanism 412 inflates the vent hole 417 .

[0032] The pneumatic mechanism 412 includes a single-head end tube 4121 and an air pressure plate 4122. The lower end of the single-head end tube 4121 is open, and the upper end of the single-head end tube 4121 is closed. The upper end of the vent 417 is connected to the interior of the single-head end tube 4121. The air pressure plate 4122 is elastically slidably inserted into the outer surface of the single-head end tube 4121. The elastic connection between the air pressure plate 4122 and the single-head end tube 4121 is connected by elastic parts such as springs, and has a tendency to push the air pressure plate 4122 to move downward. When the air pressure plate 4122 moves downward, it has a tendency to fill the air into the vent 417.

[0033] An air supply pipe 4123 is installed through the axis of the single-head end tube 4121, the column 411 is fixedly sleeved on the outer surface of the air supply pipe 4123, and the air pressure plate 4122 is slidably sleeved on the outer surface of the air supply pipe 4123. The air supply pipe 4123 is located inside the single-head end tube 4121 and is provided with an air supply hole 4124. The air supply hole 4124 is located below the air pressure plate 4122 on the inner side of the same single-head end tube 4121. The air supply hole 4124 is close to the adjacent lower column 411. The gas in the air supply pipe 4123 is filled into the lower side of the air pressure plate 4122 through the air supply hole 4124 to prevent the air pressure on the lower side of the air pressure plate 4122 from decreasing as the usage time increases, thereby preventing the thrust applied to the force-bearing shift plate 414 from decreasing.

[0034] An arc block 4125 is coaxially fixed to the upper end of the shaft cylinder 3, and an air supply disk 4126 is rotatably provided on the inner ring side of the arc block 4125. The lower end of the air supply disk 4126 is fixed to the upper end of the adjacent single-head end cylinder 4121. The circumference of the air supply disk 4126 is concave away from the side of the arc block 4125. A movable groove 4128 is provided on the other side of the circumference of the air supply disk 4126. A transmission plate 4127 is slidably inserted into the interior of the movable groove 4128. The transmission plate 4127 is fixed to the arc block 4125. Two arc cavities 5 and an axial cavity 6 are provided on the inner side of the air supply disk 4126. The axial cavity 6 is connected to the interior of the air supply pipe 4123. The axial cavity 6 is located between the two arc cavities 5, the shaft cavity 6 is connected with the two arc cavities 5, and an extended arc plate 7 is installed at the connection between the arc cavity 5 and the shaft cavity 6. An arc rod 8 slides through the movable groove 4128, and the transmission plate 4127 is fixedly sleeved on the outer surface of the arc rod 8. An air supply plate 9 is slidably inserted inside the arc cavity 5. The two ends of the arc rod 8 are respectively fixed to the two air supply plates 9. The air supply plates 9 are in sliding contact with the adjacent extended arc plates 7. The air supply disk 4126 is connected and installed with the upper end of the air supply pipe 4123. When the shaft cylinder 3 rotates with the door panel 2, it drives the arc block 4125, the transmission plate 4127, the arc rod 8 and the air supply plate 9 to rotate synchronously. When the air supply plate 9 is active, it moves synchronously in the arc cavity 5.

[0035] A partition 10 is fixedly inserted at the axis of the shaft cavity 6. The partition 10 prevents the gases in the two arc cavities 5 from affecting each other. The upper end of the air supply pipe 4123 is located on both sides of the partition 10, and a one-way valve A11 is installed on both sides of the partition 10 to limit the one-way air flow into the air supply pipe 4123. When the air supply plate 9 moves away from the transmission plate 4127 at the extended arc plate 7, the gas on the side of the air supply plate 9 away from the transmission plate 4127 can be pushed into the air supply pipe 4123 through the one-way valve A11. A one-way valve B12 is installed on the side of the air supply plate 9 to limit the one-way flow of the air flow away from the arc rod 8. A one-way valve is installed on the inner wall of the arc cavity 5 away from the arc rod 8 to limit the one-way flow of the air flow into the arc cavity 5 C13, when the air supply plate 9 moves toward the side close to the transmission plate 4127 and the air supply plate 9 contacts the extended arc plate 7, the air flow outside the air supply disk 4126 is unidirectionally drawn into the arc cavity 5 through the one-way valve C13, and at the same time, the gas in the space on the side of the air supply plate 9 close to the transmission plate 4127 flows into the other side of the air supply plate 9 through the one-way valve B12. A pressure valve 14 is installed through the inner wall of the arc cavity 5 away from the arc rod 8. When the door panel 2 moves back and forth frequently, causing the air pressure on the air supply disk 4126, the air supply pipe 4123 and the lower side of the air pressure disk 4122 to be high, the pressure valve 14 opens, so that the air pressure in the air supply disk 4126 will not increase after reaching a certain level.

[0036] The bottom pile frame 1 is fixed to the lower end of the adjacent column 411 , the pneumatic mechanism 412 is coaxially installed with the adjacent column 411 , and the single-head end tube 4121 is fixed to the adjacent column 411 .

[0037] The extended arc plate 7 is an arc-shaped structure coaxial with the column rod 411. The arc angle of the extended arc plate 7 is smaller than the arc angle at the connection between the arc cavity 5 and the shaft cavity 6. The extended arc plate 7 forms a gap with the inner wall of the arc cavity 5 at one end away from the transmission plate 4127. After the air supply plate 9 is separated from the contact with the extended arc plate 7, the space on both sides of the air supply plate 9 is connected with the shaft cavity 6. When the air supply plate 9 moves again, it will no longer fill the shaft cavity 6 and the air supply pipe 4123 with air, effectively preventing the door panel 2 from being frequently opened and closed, and the air supply pipe 4123 from being filled with air at a faster speed.

[0038] The method of using a fire door includes the following steps: S1. When the two door panels 2 are in a closed state, the vertical hole 416 on the front end surface of the linkage ring frame 415 is connected to the vent hole 417 on the front side, and the vertical hole 416 on the rear side is misaligned with the vent hole 417 on the rear side.

[0039] S2. The air pressure mechanism 412 injects air pressure into the front side of the force-receiving shift plate 414 through the connected vent hole 417 and the vertical hole 416. The air pressure pushes the force-receiving shift plate 414 through the shaft tube 3 to drive the door panel 2 to close.

[0040] S3. After the door panel 2 is pushed open to a small angle and a person passes through, the door panel 2 will automatically close under the push of air pressure.

[0041] S4. When a fire occurs and a large number of people need to pass through, the people passing through push the door panel 2 to rotate to the maximum angle. When the door panel 2 rotates, it drives the force-bearing shifting plate 414 to apply thrust to the linkage ring frame 415 through the shaft cylinder 3.

[0042] S5. When the linkage ring frame 415 rotates, the vertical hole 416 on the front side is misaligned with the air vent 417 on the front side, and then the vertical hole 416 on the rear side is connected with the air vent 417 on the rear side. The air pressure mechanism 412 injects air pressure into the rear side of the force-bearing shift plate 414 through the air vent 417 and the vertical hole 416 on the rear side, so that the door panel 2 has a tendency to open, allowing multiple people to pass quickly.

[0043] The working principle is as follows: when the two door panels 2 are in a closed state, the force-receiving plate 414 contacts the inner wall of the rear side of the vertical groove 413, pushing the vertical hole 416 on the front side of the linkage ring frame 415 to communicate with the vent hole 417 on the front side, and the vertical hole 416 on the rear side is misaligned with the vent hole 417 on the rear side. The air pressure mechanism 412 fills the front side of the force-receiving plate 414 with air pressure through the connected vent hole 417 and the vertical hole 416. The air pressure pushes the force-receiving plate 414 through the shaft cylinder 3 to drive the door panel 2 to tend to close. When the door panel 2 is opened to a smaller angle after a single person passes through, it tends to close automatically. When a fire occurs and multiple people need to pass through continuously, when the field of vision is unclear, the door panel 2 is pushed to open to the maximum angle, and the force-receiving plate 414 follows the shaft cylinder 3 The door panel 2 rotates so that the force-receiving plate 414 contacts the inner wall of the front side of the vertical groove 413. Under the push of the force-receiving plate 414, the linkage ring frame 415 drives the vertical hole 416 on the front side to be misaligned with the air vent 417 on the front side, and then drives the vertical hole 416 on the rear side to be connected with the air vent 417 on the rear side. The air pressure mechanism 412 fills the air pressure to the rear side of the force-receiving plate 414 through the air vent 417 on the rear side and the vertical hole 416 on the rear side, so that the door panel 2 has a tendency to open, so that the door panel 2 will not hinder the subsequent passing people. The door panel 2 is closed after the last person passes. After the door panel 2 is closed, the vertical hole 416 on the front side is connected with the air vent 417 on the front side again, and the door panel 2 has a tendency to close automatically, blocking the smoke and fire part on the other side.

[0044] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An emergency opening structure for a fire door, comprising a bottom pile frame (1) and two door panels (2), characterized in that: The bottom pile frame (1) is located below the door panel (2), and a shaft cylinder (3) is fixed to each of the two door panels (2) at one end away from each other. A rotatable shaft column structure (4) is provided inside the shaft cylinder (3), and the lower end of the shaft column structure (4) is mounted on the upper surface of the bottom pile frame (1); The shaft column structure (4) includes a plurality of axial pressure supply structures (41), and the axial pressure supply structures (41) are arranged on the inner side of the shaft cylinder (3); The axial pressure supply structure (41) includes a column (411) and a pneumatic mechanism (412), the column (411) and the pneumatic mechanism (412) are arranged on the inner side of the shaft tube (3) in an airtight and rotatable manner, a vertical groove (413) is provided on the circumferential side of the column (411), a force-bearing plate (414) is fixed inside the vertical groove (413) of the shaft tube (3), a linkage ring frame (415) is rotatably inserted into the top wall of the vertical groove (413), the linkage ring frame (415) is provided with two vertical holes (416) extending vertically therethrough, two vent holes (417) are provided on the bottom surface of the upper end of the column (411), and the pneumatic mechanism (412) inflates the vent holes (417); The bottom pile frame (1) is fixed to the lower end of the adjacent column (411), and the pneumatic mechanism (412) is coaxially installed with the adjacent column (411).

2. The emergency opening structure of a fire door according to claim 1, characterized in that: The pneumatic mechanism (412) comprises a single-end tube (4121) and an air pressure plate (4122). The lower end of the single-end tube (4121) is open, and the upper end of the single-end tube (4121) is closed. The upper end of the vent hole (417) is connected to the interior of the single-end tube (4121). The air pressure plate (4122) is elastically slidably plugged into the outer surface of the single-end tube (4121). The single-end tube (4121) is fixed to the adjacent column (411).

3. The emergency opening structure of a fire door according to claim 1, characterized in that: The linkage ring frame (415) comprises a ring plate (4151) and two linkage plates (4152). The two linkage plates (4152) are located inside corresponding vertical grooves (413). The force-bearing shifting plate (414) inside the corresponding vertical grooves (413) is located between the two linkage plates (4152). The upper ends of the linkage plates (4152) are fixed to the ring plates (4151). Vertical holes (416) are opened through the end faces of the ring plates (4151). The ring plates (4151) are coaxially rotatably plugged into the interior of the column rod (411).

4. The emergency opening structure of a fire door according to claim 3, characterized in that: The distance between the axis of the vertical hole (416) and the axis of the column (411) is equal to the distance between the axis of the vent hole (417) and the column (411), and the two vertical inner walls of the vertical groove (413) are provided with inner grooves (4153) adapted to the linkage plate (4152).

5. The emergency opening structure of a fire door according to claim 2, characterized in that: An air supply pipe (4123) is installed through the axis of the single-end tube (4121), the column (411) is fixedly sleeved on the outer surface of the air supply pipe (4123), and the air pressure plate (4122) is slidably sleeved on the outer surface of the air supply pipe (4123). The air supply pipe (4123) is located inside the single-end tube (4121) and is provided with an air supply hole (4124). The air supply hole (4124) is located below the air pressure plate (4122) on the inner side of the same single-end tube (4121). The air supply hole (4124) is close to the column (411) on the adjacent lower side. The upper end of the shaft tube (3) is coaxially fixed with an arc Block (4125), an air supply disc (4126) is rotatably provided on the inner ring side of the arc block (4125), the lower end of the air supply disc (4126) is fixed to the upper end of the adjacent single-head end tube (4121), the circumferential portion of the air supply disc (4126) is concave on the side away from the arc block (4125), and a movable groove (4128) is provided on the other side of the circumferential portion of the air supply disc (4126), a transmission plate (4127) is slidably inserted into the interior of the movable groove (4128), the transmission plate (4127) is fixed to the arc block (4125), and the air supply disc (4126) is connected and installed with the upper end of the air supply pipe (4123).

6. The emergency opening structure of a fire door according to claim 5, characterized in that: The inner side of the air supply disk (4126) is provided with two arc cavities (5) and an axial cavity (6), the axial cavity (6) is communicated with the inside of the air supply pipe (4123), the axial cavity (6) is located between the two arc cavities (5), the axial cavity (6) is communicated with the two arc cavities (5), an extended arc plate (7) is installed at the connection between the arc cavity (5) and the axial cavity (6), an arc rod (8) is slidably penetrated in the movable groove (4128), the transmission plate (4127) is fixedly sleeved on the outer surface of the arc rod (8), an air supply plate (9) is slidably inserted in the arc cavity (5), the two ends of the arc rod (8) are respectively fixed to the two air supply plates (9), and the air supply plate (9) is in sliding contact with the adjacent extended arc plate (7).

7. The emergency opening structure of a fire door according to claim 6, characterized in that: A partition (10) is fixedly inserted at the axis of the shaft cavity (6), and a one-way valve A (11) is installed on both sides of the upper end of the air supply pipe (4123) to limit the air flow to be filled into the air supply pipe (4123) in one direction. A one-way valve B (12) is installed through the side of the air supply plate (9) to limit the air flow to flow in one direction away from the arc rod (8). A one-way valve C (13) is installed through the inner wall of the arc cavity (5) away from the arc rod (8) to limit the air flow to flow into the arc cavity (5) in one direction. A pressure valve (14) is installed through the inner wall of the arc cavity (5) away from the arc rod (8).

8. The emergency opening structure of a fire door according to claim 3, characterized in that: The inner ring surface of the ring plate (4151) is provided with tooth grooves (15) distributed in an annular manner. A damping tooth block (16) is engaged with the inner ring side of the ring plate (4151). The damping tooth block (16) is engaged with the adjacent tooth grooves (15). The damping tooth block (16) is slidably inserted into the interior of the column rod (411). The damping tooth block (16) is elastically connected to the column rod (411).

9. The emergency opening structure of a fire door according to claim 5, characterized in that: The extended arc plate (7) is an arc-shaped structure coaxial with the column rod (411), the arc angle of the extended arc plate (7) is smaller than the arc angle at the connection between the arc cavity (5) and the shaft cavity (6), and a gap is formed between the end of the extended arc plate (7) away from the transmission plate (4127) and the inner wall of the arc cavity (5).

10. The method for using the emergency opening structure of a fire door according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When the two door panels (2) are in a closed state, the vertical hole (416) on the front side of the end surface of the linkage ring frame (415) is connected to the vent hole (417) on the front side, and the vertical hole (416) on the rear side is misaligned with the vent hole (417) on the rear side; S2, the air pressure mechanism (412) injects air pressure into the front side of the force-receiving plate (414) through the connected vent hole (417) and the vertical hole (416), and the air pressure pushes the force-receiving plate (414) through the shaft cylinder (3) to drive the door panel (2) toward closing; S3, after the door panel (2) is pushed open to a small angle and a person passes through, the door panel (2) will automatically close under the push of air pressure; S4. When a fire occurs and a large number of people need to pass through, the people passing through push the door panel (2) to rotate to the maximum angle. When the door panel (2) rotates, it drives the force-receiving plate (414) through the shaft cylinder (3) to apply a thrust to the linkage ring frame (415); S5, when the linkage ring frame (415) rotates, the vertical hole (416) on the front side is dislocated with the vent hole (417) on the front side, and then the vertical hole (416) on the rear side is connected with the vent hole (417) on the rear side. The air pressure mechanism (412) is filled with air pressure to the rear side of the force-receiving plate (414) through the vent hole (417) on the rear side and the vertical hole (416) on the rear side, so that the door panel (2) has a tendency to open, allowing multiple people to pass quickly.

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