Fire-fighting ventilation and smoke exhaust device

Abstract

The invention relates to the field of fire-fighting equipment, in particular to a fire-fighting ventilation and smoke exhaust device which comprises a smoke exhaust box, a smoke inlet and a smoke exhaust port are formed in the top and the bottom of the smoke exhaust box respectively, a movable door is arranged on one side of the smoke exhaust box in a sliding mode in the vertical direction, and a first filter screen is rotationally installed in the smoke exhaust box and located between the smoke inlet and the smoke exhaust port; a rotating shaft is additionally arranged on the side, close to the movable door, in the smoke exhaust box in the horizontal direction, the rotating shaft is used for driving the first filter screen to rotate and driving the movable door to slide, a first sealing plate is installed at the bottom of the movable door in the vertical direction and fastened into the smoke exhaust box, and the smoke exhaust box is sealed through the first sealing plate and the movable door; a second sealing plate is arranged at the bottom of the first filter screen in a sliding mode and used for sealing the first filter screen. The purpose of the invention is to effectively guarantee the smoke filtering effect of the whole smoke exhaust system.

Description

Technical Field

[0001] The present application relates to the field of fire-fighting equipment, and in particular to a fire-fighting ventilation and smoke exhaust device. Background Art

[0002] The fire-fighting ventilation and smoke exhaust system is an important fire-fighting facility for ensuring the safety of people's lives and property in buildings. Its core function is to control the flow of smoke, prevent the diffusion of smoke in the initial stage of a fire, ensure the safe evacuation of people, and create conditions for fire-fighting and rescue.

[0003] In the related art, a filter screen for filtering smoke is often provided in the fire-fighting ventilation and smoke exhaust device. After long-term use, the filter screen needs to be replaced regularly to effectively ensure the filtering effect of the filter screen on smoke. During actual use, when the filter screen in the smoke exhaust device is being replaced, the smoke exhaust device cannot continue to filter the smoke, which causes the entire smoke exhaust system to stop operating, and thus is not conducive to the daily operation of the smoke exhaust system. At the same time, when the filter screen is being replaced, the smoke exhaust device needs to be opened. After the smoke exhaust device is opened, the smoke accumulated inside for a long time will disperse around, which will pollute the air and is not conducive to people's physical health. Summary of the Invention

[0004] The present application provides a fire-fighting ventilation and smoke exhaust device, aiming to ensure that when the filter screen of the smoke exhaust device is being replaced, it does not affect the filtering of smoke by the smoke exhaust device, and at the same time can effectively prevent the smoke in the smoke exhaust device from dispersing around, thereby effectively ensuring the filtering effect of the entire smoke exhaust system on smoke and effectively ensuring the cleanliness of the surrounding air.

[0005] The present application provides a fire-fighting ventilation and smoke exhaust device, adopting the following technical solutions:

[0006] A fire-fighting ventilation and smoke exhaust device includes a smoke exhaust box. An air inlet and a smoke outlet are respectively provided at the top and bottom of the smoke exhaust box. A movable door is slidably arranged vertically on one side of the smoke exhaust box. A first filter screen is rotatably installed in the smoke exhaust box. The first filter screen is located between the air inlet and the smoke outlet. A rotating shaft is horizontally added on one side of the smoke exhaust box close to the movable door. The rotating shaft is used to drive the first filter screen to rotate and at the same time drive the movable door to slide. A first sealing plate is vertically installed at the bottom of the movable door. The first sealing plate is fastened to the inside of the smoke exhaust box. The first sealing plate and the movable door seal the smoke exhaust box. A second sealing plate is slidably arranged at the bottom of the first filter screen. The second sealing plate is used to seal the first filter screen.

[0007] By adopting the above technical solutions, during the process of the movable door rising to open the smoke exhaust box, the sealing of the smoke exhaust box is divided into two stages.

[0008] First stage: The movable door rises, and the first filter screen starts to rotate clockwise towards the direction close to the movable door. When the bottom of the movable door has not risen above the top of the first sealing plate, the space between the movable door and the first sealing plate is in a sealed state. At this time, there is no gap between the movable door and the first sealing plate, and the smoke exhaust box is still in a sealed state. In this state, the sealing of the smoke exhaust box is achieved through the cooperation of the movable door and the first sealing plate.

[0009] Second stage: As the movable door continues to rise, when the bottom of the movable door rises above the top of the first sealing plate, a gap will appear between the bottom of the movable door and the top of the first sealing plate. At this time, the smoke exhaust box is in an open state. When the bottom of the movable door rises above the top of the first sealing plate, both the first filter screen and the second sealing plate rotate to the vertical state, and at this time, the second sealing plate seals the first filter screen. In this state, the second sealing plate is used to block the gap between the movable door and the first sealing plate, thereby effectively ensuring the sealing performance inside the smoke exhaust box through the second sealing plate, and further effectively preventing the smoke inside the smoke exhaust box from escaping to the outside of the box. That is, the sealing inside the smoke exhaust box in the second stage is achieved through the cooperation of the first sealing plate, the movable door, and the second sealing plate.

[0010] With this setting method, when the first filter screen rotates towards the direction close to the movable door to the vertical state, the space between the movable door and the first sealing plate is in an open state. At the same time, the first sealing plate, the movable door, and the second sealing plate cooperate together to seal the inside of the smoke exhaust box. The open gap between the movable door and the first sealing plate can be used to replace the first filter screen, and the inside of the smoke exhaust box is always in a sealed state during the replacement process, thereby effectively avoiding the smoke inside the smoke exhaust box from escaping to the outside of the box during the replacement of the first filter screen.

[0011] Preferably, two support seats are fixedly arranged horizontally inside the smoke exhaust box. The two support seats are spaced apart inside the smoke exhaust box. Through holes are respectively formed at the ends of the two support seats. Both ends of the rotating shaft are respectively inserted into the through holes of the two support seats. One end of the rotating shaft is connected with a driving motor, and the driving motor is used to drive the rotating shaft to rotate. A transfer plate is integrally connected horizontally to the side of the first filter screen close to the rotating shaft. A transfer groove is formed at the end of the transfer plate away from the first filter screen. The rotating shaft is clamped into the transfer groove. First gears are integrally sleeved on the left and right ends of the rotating shaft in the vertical direction. First racks are respectively arranged vertically on the left and right sides of the movable door. The two first gears correspond to the two first racks one by one.

[0012] By adopting the above technical solution, during specific operation, when the driving motor is turned on, while driving the rotating shaft to rotate, the driving motor drives the adapter plate and the first filter screen to rotate in the smoke exhaust box. While driving the rotating shaft to rotate, the driving motor synchronously drives two first gears to rotate through the rotating shaft. During the rotation of the two first gears, the two first gears drive two first racks to move up and down, and then drive the movable door to move up and down through the two first racks. Furthermore, while driving the first filter screen to rotate by the rotating shaft, the movable door is driven to move up and down accordingly.

[0013] Preferably, sliding grooves are formed in the left and right sides of the movable door in the vertical direction, and the two first racks are respectively slidably installed in the two sliding grooves.

[0014] By adopting the above technical solution, during the process of the first rack driving the movable door to move up and down, the sliding groove plays a guiding role in the up and down movement of the first rack, which is beneficial to ensuring the stability of the movable door during the up and down movement.

[0015] Preferably, an auxiliary gear is arranged between the first gear and the first rack, and the auxiliary gear is meshed and connected with the first gear and the first rack respectively.

[0016] By adopting the above technical solution, when replacing the first filter screen, while the movable door rises, the first filter screen needs to rotate towards the direction close to the movable door. The rotation of the first filter screen towards the direction close to the movable door is clockwise rotation, which makes the rotation of the rotating shaft and the first gear also clockwise rotation. During the clockwise rotation of the first gear, it meshes with the auxiliary gear, thereby driving the auxiliary gear to rotate counterclockwise. While the auxiliary gear rotates counterclockwise, it drives the first rack to rise, and then drives the movable door to rise.

[0017] Preferably, a second gear is meshed and connected to the side of the first gear away from the auxiliary gear, a third gear is connected to the side of the second gear away from the first gear through a pulley, a second rack is integrally connected to the side wall of the second sealing plate, and the second rack is meshed and connected with the third gear.

[0018] By adopting the above technical solution, when the first filter screen rotates clockwise towards the direction close to the movable door, the first gear rotates clockwise. During the clockwise rotation of the first gear, it drives the second gear and the third gear to rotate counterclockwise. During the counterclockwise rotation of the third gear, it drives the second rack to slide towards the direction close to the first filter screen, and then drives the second sealing plate to slide towards the direction close to the first filter screen through the second rack. When the first filter screen rotates to the vertical state, the second sealing plate slides to the side of the first filter screen away from the movable door to seal the first filter screen.

[0019] In the initial state, when the first filter screen is normally filtering the flue gas in the smoke exhaust box, the second sealing plate is located at the lower right of the first filter screen, and the two form a "Z"-shaped structure as a whole. By arranging the second sealing plate at the lower right of the first filter screen, when the first filter screen filters the flue gas, the second sealing plate will not interfere with the filtering of the first filter screen.

[0020] When the first filter screen rotates to the vertical state, the second sealing plate slides to the side of the first filter screen away from the movable door under the drive of the second rack to seal the first filter screen, thereby effectively ensuring the overall sealing performance of the smoke exhaust box.

[0021] Preferably, a second filter screen and a third filter screen are respectively installed at the smoke inlet and the smoke outlet.

[0022] By adopting the above technical solution, the second filter screen and the third filter screen are used to realize the multi-stage filtering of the flue gas by the smoke exhaust box, which is beneficial to improving the smoke exhaust effect of the smoke exhaust box.

[0023] Preferably, the second filter screen is slidably installed at the smoke inlet in the horizontal direction, the third filter screen is fixedly installed at the smoke outlet, and when the first filter screen rotates towards the movable door, the second filter screen slides towards the smoke inlet; when the first filter screen rotates away from the movable door, the second filter screen slides away from the smoke inlet.

[0024] By adopting the above technical solution, the purpose is to effectively ensure that there are always two-stage filtrations of the flue gas in the smoke exhaust box. When the first filter screen rotates to the vertical state, the first filter screen does not have the filtering function at this time. In this state, the second filter screen slides to the lower part of the smoke inlet, and the two-stage filtration of the flue gas is realized by the second filter screen and the third filter screen. After the first filter screen rotates back to the horizontal state, the first filter screen resumes the filtering function of the flue gas. In this state, the second filter screen slides away from the smoke inlet, and the two-stage filtration of the flue gas is carried out by the first filter screen and the third filter screen.

[0025] The reason for setting the second filter screen in this slidable installation method instead of fixing the second filter screen under the smoke inlet is that if the first filter screen, the second filter screen and the third filter screen filter the flue gas at the same time, the filtering effect of the flue gas will be affected to a certain extent due to the large number of filter screens. Therefore, setting the second filter screen in a slidable installation method can always keep the two-stage filtration state in the smoke exhaust box.

[0026] Preferably, two hinge seats are fixedly installed on the inner side of the movable door, a hinge shaft is installed between the two hinge seats, a hinge rod is sleeved on the hinge shaft, and one end of the hinge rod away from the hinge shaft is hinged to the second filter screen.

[0027] By adopting the above technical solution, when the first filter screen rotates towards the direction close to the movable door, the movable door rises. During this process, the hinge rod is utilized to drive the second filter screen to slide towards the direction close to the smoke inlet; when the first filter screen rotates away from the movable door, the movable door descends. During this process, the hinge rod drives the second filter screen to slide away from the smoke inlet.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. When the first filter screen rotates towards the direction close to the movable door to the vertical state, an open state is formed between the movable door and the first sealing plate. At the same time, the first sealing plate, the movable door, and the second sealing plate cooperate together to seal the inside of the smoke exhaust box. The open gap between the movable door and the first sealing plate can be used to replace the first filter screen, and the inside of the smoke exhaust box is always in a sealed state during the replacement process. Furthermore, it can effectively prevent the smoke in the smoke exhaust box from escaping to the outside during the replacement of the first filter screen;

[0030] 2. The second filter screen and the third filter screen are utilized to achieve multi-stage filtration of the smoke by the smoke exhaust box, which is beneficial to improving the smoke exhaust effect of the smoke exhaust box;

[0031] 3. The second filter screen is set in this sliding installation manner instead of being fixed below the smoke inlet because if the first filter screen, the second filter screen, and the third filter screen filter the smoke simultaneously, due to the relatively large number of filter screens, it will also affect the smoke filtration effect to a certain extent. Therefore, setting the second filter screen in a sliding installation manner can always keep the inside of the smoke exhaust box in a two-stage filtration state. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the overall embodiment of the present application;

[0033] Figure 2 is a schematic structural diagram of the embodiment of the present application specifically showing the positional relationship among the first filter screen, the second filter screen, and the third filter screen;

[0034] Figure 3 is a schematic structural diagram of the embodiment of the present application specifically showing the positional relationship among the second sealing plate, the first gear, the hinge seat, the hinge shaft, and the hinge rod;

[0035] Figure 4 is a schematic structural diagram of the embodiment of the present application specifically showing the positional relationship among the auxiliary gear, the second gear, the third gear, and the second rack.

[0036] Reference numerals: 1, smoke exhaust box; 2, smoke inlet; 3, smoke outlet; 4, movable door; 5, first filter screen; 6, rotating shaft; 7, first sealing plate; 8, second sealing plate; 9, support seat; 10, drive motor; 11, adapter plate; 12, adapter slot; 13, first gear; 14, first rack; 15, chute; 16, auxiliary gear; 17, second gear; 18, third gear; 19, second rack; 20, second filter screen; 21, third filter screen; 22, hinge seat; 23, hinge shaft; 24, hinge rod. Detailed implementation manners

[0037] The following is a further detailed description of the present application in conjunction with Figure 1 - attached Figure 4 drawings to make a further detailed description of the present application.

[0038] Embodiment:

[0039] An embodiment of the present application discloses a fire ventilation and smoke exhaust device. Referring to Figure 1 and Figure 2 , it includes a smoke exhaust box 1. The smoke exhaust box 1 is generally rectangular in shape. A smoke inlet 2 and a smoke outlet 3 are respectively provided at the top and bottom of the smoke exhaust box 1. A vertically movable movable door 4 is provided on one side of the smoke exhaust box 1 along the vertical direction. The opening or closing of the smoke exhaust box 1 is realized by the lifting of the movable door 4. A first filter screen 5 is rotatably installed in the smoke exhaust box 1. The first filter screen 5 is located between the smoke inlet 2 and the smoke outlet 3. When the smoke exhaust box 1 is exhausting smoke specifically, the first filter screen 5 filters the smoke.

[0040] Referring to Figure 1 and Figure 2 , a rotating shaft 6 is additionally installed horizontally on one side of the smoke exhaust box 1 close to the movable door 4. The rotating shaft 6 is used to drive the first filter screen 5 to rotate in the smoke exhaust box 1, and at the same time drive the movable door 4 to lift, so as to realize the opening or closing of the smoke exhaust box 1. Specifically, when the rotating shaft 6 rotates clockwise, in this state, the rotating shaft 6 drives the first filter screen 5 to rotate towards the direction close to the movable door 4, and at the same time the movable door 4 rises; when the rotating shaft 6 rotates counterclockwise, in this state, the rotating shaft 6 drives the first filter screen 5 to rotate towards the direction away from the movable door 4, and at the same time the movable door 4 descends.

[0041] When the first filter screen 5 needs to be replaced, the first filter screen 5 can be rotated to the position of the movable door 4 for replacement.

[0042] Referring to Figure 1 and Figure 2 , a first sealing plate 7 is installed vertically at the bottom of the movable door 4. The first sealing plate 7 is generally in a "U" - shaped structure. The first sealing plate 7 is fastened to the inside of the smoke exhaust box 1 through fastening bolts. The first sealing plate 7 and the movable door 4 seal the smoke exhaust box 1, effectively ensuring the sealing performance inside the smoke exhaust box 1.

[0043] Referring toFigure 1 , Figure 2 and Figure 3 , when the first filter screen 5 rotates to the access door 4 for replacement, the access door 4 needs to rise above the first sealing plate 7 to open the smoke exhaust box 1. At this time, a gap will appear between the bottom of the access door 4 and the top of the first sealing plate 7. In this state, the flue gas in the smoke exhaust box 1 will escape from the smoke exhaust box 1 to the outside of the box, thereby polluting the surrounding air. To effectively prevent the leakage of the flue gas in the smoke exhaust box 1, a second sealing plate 8 is slidably arranged at the bottom of the first filter screen 5. When the first filter screen 5 rotates to the access door 4 for replacement, the second sealing plate 8 slides to the side of the first filter screen 5 away from the access door 4 to seal the first filter screen 5. In this state, the first filter screen 5 is sealed by the second sealing plate 8, thereby effectively preventing the flue gas in the smoke exhaust box 1 from escaping to the outside of the box through the first filter screen 5.

[0044] It should be noted here that in the initial state, both the first filter screen 5 and the second sealing plate 8 are in a horizontal state in the smoke exhaust box 1, and the second sealing plate 8 is located below the first filter screen 5, and the two form a "Z"-shaped structure as a whole. When the first filter screen 5 starts to rotate in the smoke exhaust box 1, the first filter screen 5 drives the second sealing plate 8 to rotate synchronously. And when the first filter screen 5 rotates clockwise by 90°, both the first filter screen 5 and the second sealing plate 8 rotate to a vertical state, and the second sealing plate 8 slides to the side of the first filter screen 5 away from the access door 4. In this state, the first filter screen 5 is sealed by the second sealing plate 8.

[0045] In summary, during the process of the access door 4 rising to open the smoke exhaust box 1, the sealing of the smoke exhaust box 1 is divided into two stages.

[0046] The first stage: The access door 4 rises, and the first filter screen 5 starts to rotate clockwise towards the direction close to the access door 4. When the bottom of the access door 4 has not risen above the top of the first sealing plate 7, the access door 4 and the first sealing plate 7 are in a sealed state. At this time, there is no gap between the access door 4 and the first sealing plate 7, and the smoke exhaust box 1 is still in a sealed state. In this state, the sealing of the smoke exhaust box 1 is still achieved by the cooperation of the access door 4 and the first sealing plate 7.

[0047] Second stage: As the movable door 4 continues to rise, when the bottom of the movable door 4 rises above the top of the first sealing plate 7, a gap will appear between the bottom of the movable door 4 and the top of the first sealing plate 7. At this time, the smoke exhaust box 1 is in an open state. When the bottom of the movable door 4 rises above the top of the first sealing plate 7, both the first filter screen 5 and the second sealing plate 8 rotate to the vertical state, and at this time, the second sealing plate 8 seals the first filter screen 5. In this state, the second sealing plate 8 is used to block the gap between the movable door 4 and the first sealing plate 7, thereby effectively ensuring the sealing performance inside the smoke exhaust box 1 through the second sealing plate 8, and further effectively preventing the smoke in the smoke exhaust box 1 from escaping from the box to the outside. That is, the sealing inside the smoke exhaust box 1 in the second stage is achieved through the cooperation of the first sealing plate 7, the movable door 4, and the second sealing plate 8 together.

[0048] In this setting method, when the first filter screen 5 rotates towards the movable door 4 to the vertical state, an open state exists between the movable door 4 and the first sealing plate 7. At the same time, the first sealing plate 7, the movable door 4, and the second sealing plate 8 cooperate together to seal the inside of the smoke exhaust box 1. The open gap between the movable door 4 and the first sealing plate 7 can be used to replace the first filter screen 5, and during the replacement process, the inside of the smoke exhaust box 1 always remains in a sealed state, thereby effectively avoiding the smoke in the smoke exhaust box 1 from escaping to the outside during the replacement of the first filter screen 5.

[0049] Specifically, referring to Figure 1 、 Figure 2 and Figure 3 In the smoke exhaust box 1, two support seats 9 are welded horizontally. The two support seats 9 are spaced apart in the smoke exhaust box 1. Through holes are respectively opened at the ends of the two support seats 9, and the two ends of the rotating shaft 6 are respectively inserted into the through holes of the two support seats 9 to stably support the rotating shaft 6 through the two support seats 9. One end of the rotating shaft 6 is connected to a driving motor 10. The driving motor 10 is located outside the smoke exhaust box 1, and the driving motor 10 is used to drive the rotating shaft 6 to rotate.

[0050] Referring to Figure 2 、 Figure 3 and Figure 4 On the side of the first filter screen 5 close to the rotating shaft 6, a transfer plate 11 is integrally connected horizontally. The end of the transfer plate 11 away from the first filter screen 5 is in an open shape, and an arc-shaped transfer groove 12 is opened inside the transfer plate 11. The rotating shaft 6 is clamped into the transfer groove 12.

[0051] During specific operation, when the driving motor 10 is turned on, while the driving motor 10 drives the rotating shaft 6 to rotate, it drives the transfer plate 11 and the first filter screen 5 to rotate inside the smoke exhaust box 1.

[0052] In this embodiment, one end of the adapter board 11 close to the first sealing plate 7 abuts against the first sealing plate 7. The purpose of doing this is that after the front end of the adapter board 11 abuts against the first sealing plate 7, when the adapter board 11 rotates to the vertical state, the first filter screen 5 can be closely attached to the first sealing plate 7, further ensuring the overall sealing performance of the smoke exhaust box 1.

[0053] Referring to Figure 2 and Figure 3 , first gears 13 are integrally sleeved on the left and right ends of the rotating shaft 6 in the vertical direction. At the same time, first racks 14 are installed on the left and right sides of the movable door 4 along the vertical direction, and the two first gears 13 and the two first racks 14 correspond one by one. While the driving motor 10 drives the rotating shaft 6 to rotate, the two first gears 13 are synchronously driven to rotate by the rotating shaft 6. During the rotation of the two first gears 13, the two first racks 14 are driven to lift, and then the movable door 4 is driven to lift by the two first racks 14. Thus, while the first filter screen 5 is driven to rotate by the rotating shaft 6, the movable door 4 is driven to perform corresponding lifting.

[0054] Referring to Figure 2 and Figure 3 , elongated chutes 15 are formed in the left and right sides of the movable door 4 along the vertical direction, and the two first racks 14 are respectively slidably installed in the two chutes 15. During the process of the first rack 14 driving the movable door 4 to lift, the chute 15 plays a guiding role in the lifting of the first rack 14, which is beneficial to ensuring the stability of the movable door 4 during the lifting process.

[0055] Further, referring to Figure 3 and Figure 4 , corresponding auxiliary gears 16 are provided between the first gear 13 and the first rack 14, and the auxiliary gears 16 are respectively meshed with the first gear 13 and the first rack 14. In this embodiment, when replacing the first filter screen 5, the first filter screen 5 needs to rotate in the direction close to the movable door 4 while the movable door 4 rises. The rotation of the first filter screen 5 in the direction close to the movable door 4 is clockwise rotation, which makes the rotation of the rotating shaft 6 and the first gear 13 also clockwise rotation. During the clockwise rotation of the first gear 13, it meshes with the auxiliary gear 16, thereby driving the auxiliary gear 16 to rotate counterclockwise. While the auxiliary gear 16 rotates counterclockwise, it drives the first rack 14 to rise, thereby driving the movable door 4 to rise.

[0056] Specifically, referring to Figure 3 and Figure 4 , a second gear 17 is meshed with the side of the first gear 13 away from the auxiliary gear 16. The side of the second gear 17 away from the first gear 13 is connected with a third gear 18 through a pulley. At the same time, a second rack 19 is integrally connected to the side wall of the second sealing plate 8, and the second rack 19 is meshed with the third gear 18.

[0057] When the first filter screen 5 rotates clockwise towards the movable door 4, the first gear 13 rotates clockwise. During the clockwise rotation of the first gear 13, the second gear 17 and the third gear 18 are driven to rotate counterclockwise. During the counterclockwise rotation of the third gear 18, the second rack 19 is driven to slide towards the first filter screen 5, and then the second sealing plate 8 is driven to slide towards the first filter screen 5 by the second rack 19. When the first filter screen 5 rotates to the vertical state, the second sealing plate 8 slides to the side of the first filter screen 5 away from the movable door 4 to seal the first filter screen 5.

[0058] In the initial state, when the first filter screen 5 normally filters the flue gas in the smoke exhaust box 1, the second sealing plate 8 is located at the lower right of the first filter screen 5, and the two form a "Z" - shaped structure as a whole. By arranging the second sealing plate 8 at the lower right of the first filter screen 5, the second sealing plate 8 will not interfere with the filtration of the first filter screen 5 when the first filter screen 5 filters the flue gas.

[0059] When the first filter screen 5 rotates to the vertical state, the second sealing plate 8 slides to the side of the first filter screen 5 away from the movable door 4 under the drive of the second rack 19 to seal the first filter screen 5, thereby effectively ensuring the overall tightness of the smoke exhaust box 1.

[0060] Specifically, a connecting plate is integrally formed at the top of the second sealing plate 8. The connecting plate is vertically arranged, and the second rack 19 is integrally formed on the corresponding connecting plate. The second sealing plate 8 and the second rack 19 are integrally connected through the corresponding connecting plate. Thus, the second rack 19 drives the second sealing plate 8 to slide synchronously during the sliding process.

[0061] Further, referring to Figure 1 and Figure 2 , second filter screens 20 and third filter screens 21 are respectively installed at the smoke inlet 2 and the smoke outlet 3 of the smoke exhaust box 1. The second filter screens 20 and the third filter screens 21 are used to achieve multi - stage filtration of the flue gas by the smoke exhaust box 1, which is beneficial to improving the smoke exhaust effect of the smoke exhaust box 1.

[0062] Further, the second filter screen 20 is slidably installed horizontally at the smoke inlet 2, and the third filter screen 21 is fixedly installed at the smoke outlet 3. When the first filter screen 5 rotates towards the movable door 4, the second filter screen 20 slides towards the smoke inlet 2; when the first filter screen 5 rotates away from the movable door 4, the second filter screen 20 slides away from the smoke inlet 2.

[0063] The purpose of doing this is to effectively ensure that there are always two - stage filtrations of the flue gas in the exhaust smoke box 1. When the first filter screen 5 rotates to the vertical state, the first filter screen 5 does not have the filtering function at this time. In this state, the second filter screen 20 slides to below the smoke inlet 2, and the two - stage filtration of the flue gas is realized by using the second filter screen 20 and the third filter screen 21. When the first filter screen 5 rotates back to the horizontal state, the first filter screen 5 resumes the filtering function of the flue gas. In this state, the second filter screen 20 slides away from the smoke inlet 2, and the two - stage filtration of the flue gas is carried out by using the first filter screen 5 and the third filter screen 21.

[0064] The reason for setting the second filter screen 20 in this sliding installation method instead of fixing the second filter screen 20 below the smoke inlet 2 is that if the first filter screen 5, the second filter screen 20 and the third filter screen 21 filter the flue gas simultaneously, due to the relatively large number of filter screens, it will also affect the filtering effect of the flue gas to a certain extent. Therefore, setting the second filter screen 20 in a sliding installation method can always keep the exhaust smoke box 1 in a two - stage filtration state.

[0065] Specifically, referring to Figure 1 and Figure 3 , two hinge seats 22 are fixedly installed on the inner side of the movable door 4. An articulated shaft 23 is installed between the two hinge seats 22. An articulated rod 24 is sleeved on the articulated shaft 23. One end of the articulated rod 24 far from the articulated shaft 23 is articulated and connected to the second filter screen 20. When the first filter screen 5 rotates towards the movable door 4, the movable door 4 rises. During this process, the articulated rod 24 is used to drive the second filter screen 20 to slide towards the smoke inlet 2. When the first filter screen 5 rotates away from the movable door 4, the movable door 4 descends. During this process, the articulated rod 24 drives the second filter screen 20 to slide away from the smoke inlet 2.

[0066] The implementation principle of a fire ventilation and exhaust device in an embodiment of the present application is as follows:

[0067] In the initial state, both the first filter screen 5 and the second sealing plate 8 are in the horizontal state in the exhaust smoke box 1. The second sealing plate 8 is located below the first filter screen 5, and the two form a "Z" - shaped structure as a whole. When the first filter screen 5 starts to rotate in the exhaust smoke box 1, the first filter screen 5 drives the second sealing plate 8 to rotate synchronously. And when the first filter screen 5 rotates clockwise by 90°, both the first filter screen 5 and the second sealing plate 8 rotate to the vertical state, and the second sealing plate 8 slides to the side of the first filter screen 5 far from the movable door 4. In this state, the second sealing plate 8 is used to seal the first filter screen 5.

[0068] To sum up, during the process of opening the exhaust smoke box 1 by raising the movable door 4, the sealing of the exhaust smoke box 1 is divided into two stages.

[0069] The first stage: The movable door 4 rises, and the first filter screen 5 starts to rotate clockwise towards the direction close to the movable door 4. When the bottom of the movable door 4 has not risen above the top of the first sealing plate 7, the movable door 4 and the first sealing plate 7 are in a sealed state. At this time, there is no gap between the movable door 4 and the first sealing plate 7, and the smoke exhaust box 1 is still in a sealed state. In this state, the sealing of the smoke exhaust box 1 is still achieved through the cooperation of the movable door 4 and the first sealing plate 7.

[0070] The second stage: As the movable door 4 continues to rise, when the bottom of the movable door 4 rises above the top of the first sealing plate 7, a gap will appear between the bottom of the movable door 4 and the top of the first sealing plate 7. At this time, the smoke exhaust box 1 is in an open state. When the bottom of the movable door 4 rises above the top of the first sealing plate 7, both the first filter screen 5 and the second sealing plate 8 rotate to a vertical state, and at this time, the second sealing plate 8 seals the first filter screen 5. In this state, the second sealing plate 8 is used to block the gap between the movable door 4 and the first sealing plate 7, thereby effectively ensuring the sealing inside the smoke exhaust box 1 through the second sealing plate 8, and further effectively preventing the smoke in the smoke exhaust box 1 from escaping from the box to the outside. That is, the sealing inside the smoke exhaust box 1 in the second stage is achieved through the cooperation of the first sealing plate 7, the movable door 4, and the second sealing plate 8 together.

[0071] With this setting method, when the first filter screen 5 rotates to a vertical state towards the direction close to the movable door 4, the movable door 4 and the first sealing plate 7 are in an open state. At the same time, the first sealing plate 7, the movable door 4, and the second sealing plate 8 cooperate together to seal the inside of the smoke exhaust box 1. The open gap between the movable door 4 and the first sealing plate 7 can be used to replace the first filter screen 5, and the inside of the smoke exhaust box 1 is always in a sealed state during the replacement process, thereby effectively avoiding the smoke in the smoke exhaust box 1 from escaping to the outside during the replacement of the first filter screen 5.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A fire ventilation and smoke exhaust device, characterized in that: It includes a smoke exhaust box (1), an air inlet (2) and a smoke exhaust port (3) are respectively arranged at the top and bottom of the smoke exhaust box (1), a movable door (4) is slidably arranged along the vertical direction on one side of the smoke exhaust box (1), a first filter screen (5) is rotatably installed in the smoke exhaust box (1), the first filter screen (5) is located between the air inlet (2) and the smoke exhaust port (3), a rotating shaft (6) is horizontally added on one side of the smoke exhaust box (1) close to the movable door (4), the rotating shaft (6) is used to drive the first filter screen (5) to rotate and at the same time drive the movable door (4) to slide, a first sealing plate (7) is installed along the vertical direction at the bottom of the movable door (4), the first sealing plate (7) is fastened into the smoke exhaust box (1), the first sealing plate (7) and the movable door (4) seal the smoke exhaust box (1), a second sealing plate (8) is slidably arranged at the bottom of the first filter screen (5), and the second sealing plate (8) is used to seal the first filter screen (5).

2. The fire ventilation and smoke exhaust device according to claim 1, characterized in that: Two support seats (9) are fixed horizontally in the smoke exhaust box (1), the two support seats (9) are spaced apart in the smoke exhaust box (1), through holes are respectively formed through the ends of the two support seats (9), the two ends of the rotating shaft (6) are respectively inserted into the through holes of the two support seats (9), a driving motor (10) is connected to one end of the rotating shaft (6), the driving motor (10) is used to drive the rotating shaft (6) to rotate, a transfer plate (11) is integrally connected horizontally to one side of the first filter screen (5) close to the rotating shaft (6), a transfer groove (12) is formed at the end of the transfer plate (11) away from the first filter screen (5), the rotating shaft (6) is clamped into the transfer groove (12), first gears (13) are integrally sleeved on the left and right ends of the rotating shaft (6) in the vertical direction, first racks (14) are installed along the vertical direction on the left and right sides of the movable door (4), and the two first gears (13) correspond to the two first racks (14) one by one.

3. A fire ventilation and smoke exhaust device according to claim 2, characterized in that: Chutes (15) are respectively formed along the vertical direction on the left and right sides of the movable door (4), and the two first racks (14) are respectively slidably installed in the two chutes (15).

4. A fire ventilation and smoke exhaust device according to claim 3, characterized in that: An auxiliary gear (16) is added between the first gear (13) and the first rack (14), and the auxiliary gear (16) is meshed and connected with the first gear (13) and the first rack (14) respectively.

5. A fire ventilation and smoke exhaust device according to claim 4, characterized in that: A second gear (17) is meshed and connected to the side of the first gear (13) away from the auxiliary gear (16), a third gear (18) is connected to the side of the second gear (17) away from the first gear (13) through a pulley, a second rack (19) is integrally connected to the side wall of the second sealing plate (8), and the second rack (19) is meshed and connected with the third gear (18).

6. The fire ventilation and smoke exhaust device according to claim 5, characterized in that: A second filter screen (20) and a third filter screen (21) are respectively installed at the air inlet (2) and the smoke exhaust port (3).

7. A fire ventilation and smoke exhaust device according to claim 6, characterized in that: The second filter screen (20) is slidably mounted horizontally at the smoke inlet (2), the third filter screen (21) is fixedly mounted at the smoke outlet (3), and when the first filter screen (5) rotates towards the direction close to the movable door (4), the second filter screen (20) slides towards the direction close to the smoke inlet (2); when the first filter screen (5) rotates towards the direction away from the movable door (4), the second filter screen (20) slides towards the direction away from the smoke inlet (2).

8. A fire ventilation and smoke exhaust device according to claim 7, characterized in that: Two hinge seats (22) are fixedly mounted on the inner side of the movable door (4), a hinge shaft (23) is mounted between the two hinge seats (22), a hinge rod (24) is sleeved on the hinge shaft (23), and one end of the hinge rod (24) away from the hinge shaft (23) is hinged to the second filter screen (20).

Images