Movable smoke exhaust device for fire emergency rescue

Abstract

The invention relates to the technical field of fire-fighting smoke exhaust devices, in particular to a fire-fighting emergency rescue movable smoke exhaust device which comprises a movable bracket and a first smoke exhaust fan installed on the movable bracket and further comprises two second smoke exhaust fans arranged on the front side and the rear side of the second smoke exhaust fan correspondingly. The first smoke exhaust fan and the second smoke exhaust fan can be switched between a same-column state and a same-row state; the external expansion assembly comprises moving parts and a driving part, the number of the moving parts is two, in the storage state, the first smoke exhaust fan and the two second smoke exhaust fans can be retracted into a row, the occupied space of the device is effectively reduced, and storage and transportation are convenient; when the smoke exhaust fan is used, the two second smoke exhaust fans can synchronously move outwards in the opposite directions through the external expansion assembly, and the two second smoke exhaust fans and the first smoke exhaust fan are adjusted to be in a row through the leveling assembly, so that the smoke exhaust range is expanded, meanwhile, airflow turbulence can be effectively reduced, and the smoke exhaust efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire smoke exhaust devices, in particular to a mobile smoke exhaust device for fire emergency rescue. Background Art

[0002] In daily life scenarios in buildings, line burnout is one of the common causes of fire. Once a fire occurs, firefighters need to quickly carry out firefighting work. After the fire is successfully extinguished, a large amount of thick smoke will often remain at the scene. If this thick smoke is inhaled in large quantities by the human body, it will cause serious harm to the body. Therefore, in order to ensure the safety of personnel and the indoor environment, it is particularly important to use smoke exhaust devices to exhaust the thick smoke out of the room in time.

[0003] Most existing smoke exhaust devices consist of a mounting frame equipped with a smoke exhaust fan. When discharging thick smoke, the exhaust range is small, resulting in low smoke exhaust efficiency. If multiple independent smoke exhaust devices are used, more people are needed to push and move them, and they take up a lot of space. After searching, patent application number 202210532529.2 discloses an intelligent mobile smoke exhaust device for building fire protection. By setting an expansion mechanism, three smoke exhaust machines can be arranged horizontally. The three horizontally arranged smoke exhaust machines can absorb smoke over a large area, thereby improving the smoke exhaust efficiency of the smoke exhaust device and quickly discharging smoke from the room.

[0004] However, in actual use, although the three smoke exhaust fans are arranged horizontally after being unfolded, they are not on the same horizontal plane. The smoke exhaust fans are actually staggered front to back. Since the airflow blown out by each fan has its own direction and speed, the high-speed airflow blown out by the front fan will disturb the airflow state at the air inlet of the rear fan (for example, the airflow blown out by the front fan may form turbulence near the air inlet of the rear fan, making the airflow speed and direction inhaled by the rear fan unstable). The airflow interference will reduce the effective smoke exhaust volume of the fan, making it impossible for the rear fan to smoothly inhale smoke, and its actual working efficiency will be greatly reduced. Especially in a smoke exhaust channel of a specific size, the fans staggered front to back will change the direction of the airflow, resulting in increased local resistance. According to the principles of fluid mechanics, the change in airflow direction will produce vortices and other phenomena, which will increase energy loss and is not conducive to the rapid discharge of smoke. For this reason, we propose a mobile smoke exhaust device for fire emergency rescue. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a mobile smoke exhaust device for fire emergency rescue, comprising a mobile bracket and a first smoke exhaust fan mounted thereon, and further comprising:

[0006] Two second smoke exhaust fans, the two second smoke exhaust fans are respectively arranged at the front and rear sides of the first smoke exhaust fan, and the first smoke exhaust fan and the second smoke exhaust fan can be switched between the same column and the same row;

[0007] An outward expansion component, the outward expansion component includes a moving part and a driving part, the moving parts are provided with two, each connected to a second smoke exhaust fan, and the driving part can make the two second smoke exhaust fans move outward synchronously in opposite directions;

[0008] A leveling assembly is provided on the moving part, and after the second smoke exhaust fan in the same row moves outward, the second smoke exhaust fan and the first smoke exhaust fan are placed on the same horizontal line by the leveling assembly;

[0009] A stabilizing component is used to improve the stability of the connection after the second smoke exhaust fan and the first smoke exhaust fan are on the same horizontal line.

[0010] In some embodiments, the movable part includes an outward moving part movably mounted on the lower ends of the front and rear sides of the first smoke exhaust fan mounting seat, the ends of the outward moving part are fixed with mounting strips, the bottom ends of the front and rear sides of the mounting seat of the first smoke exhaust fan are fixed with support strips, the outward moving part slides to fit the support strips, and a block is connected to the outward moving part for preventing the outward moving part from completely detaching from the first smoke exhaust fan.

[0011] The outward moving part includes a first outward moving bar and a second outward moving bar. A rack is fixed to the side of the first outward moving bar facing the first smoke exhaust fan, and an axial receiving groove is provided on the first outward moving bar. A third outward moving bar is fixed to one end of the second outward moving bar close to the first outward moving bar. The third outward moving bar is inserted into the receiving groove, and the stop block is fixed on the second outward moving bar.

[0012] In some embodiments, a telescopic rod is installed on the upper end surface of the second outward moving bar, a protrusion is fixed on the upper end surface of the first outward moving bar and at one end close to the second outward moving bar, and the output end of the telescopic rod is connected to the protrusion.

[0013] In some embodiments, the driving part includes a first gear and a second gear rotatably mounted inside the mounting base at the bottom end of the first smoke exhaust fan, the first gear and the second gear respectively engage with corresponding racks, and a belt connector is connected between the connecting shafts of the first gear and the second gear, and a hand wheel is installed at the bottom end of the connecting shaft of the second gear.

[0014] In some embodiments, the leveling assembly includes a protruding plate fixed to the outer wall of the mounting bar, a screw rod is installed on the protruding plate, a mounting piece is connected between the lower end of the end of the second smoke exhaust fan and the screw rod, and a movable groove for moving the mounting piece is opened along the length direction on the mounting bar.

[0015] In some embodiments, the mounting member includes a movable bar fixed at the lower end of the second smoke exhaust fan, a nut seat is installed on the outer wall of the movable bar, and the upper and lower walls of the movable bar are fixed with limit bars, and a limit groove is opened in the movable groove to cooperate with the limit bar.

[0016] In some embodiments, a first groove is formed on both sides of the bottom mounting base of the first smoke exhaust fan, a first magnetic block is fixed in the first groove, an outer end of the first magnetic block is lower than an outer end of the first groove, and a second groove is formed on the side wall of the bottom mounting base of the second smoke exhaust fan;

[0017] In some embodiments, the stabilizing component includes a second magnetic block disposed in the second groove, a spring is connected between the second magnetic block and the inside of the second groove, and a pull rope extending to the outside of the bottom end mounting seat of the second smoke exhaust fan is connected to the middle of the inner end of the second magnetic block.

[0018] In some embodiments, the front and rear sides of the mounting base of the first smoke exhaust fan are provided with sliding grooves, the stop block is located in the sliding groove, the upper end surface of the support bar is provided with a guide groove, and the bottom end of the outward moving part is connected to a guide bar that slides and fits the guide groove.

[0019] In some embodiments, a cleaning piece is further included. The cleaning piece is an arc-shaped scraper strip. The second smoke exhaust fan and the first smoke exhaust fan on the front side are both provided with a cleaning piece, and a plurality of elastic protruding pins are fixed to the outer wall of the cleaning piece.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. In the storage state, the first smoke exhaust fan and the two second smoke exhaust fans can be retracted into a row, effectively reducing the space occupied by the device and facilitating storage and transportation; when in use, the two second smoke exhaust fans can be synchronously moved outward in opposite directions through the outward expansion component, and adjusted to be in a row with the first smoke exhaust fan through the leveling component, so that while expanding the smoke exhaust range, it can also effectively reduce the occurrence of airflow turbulence and improve the smoke exhaust efficiency.

[0022] 2. A stabilizing component is provided. Through the magnetic attraction between the first magnetic block and the second magnetic block, when the second smoke exhaust fan moves into place, the end of the second magnetic block enters the first groove, which can play a role in determining the position. Secondly, it can also play a limiting role to prevent the second smoke exhaust fan from shifting during operation and ensure stability.

[0023] 3. When the second exhaust fan expands or retracts, the cleaning piece can scrape the surface of the filter to remove attached soot. The elastic convex needle can enter the filter hole to improve the cleaning effect and reduce the subsequent cleaning workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of another aspect of the present invention;

[0026] Figure 3 This is a schematic structural diagram of the first smoke exhaust fan, the outward expansion assembly, the leveling assembly, and the stabilizing assembly of the present invention in an assembled state;

[0027] Figure 4 This is a schematic diagram of the structure of the present invention in which the expansion assembly, the leveling assembly, and the stabilizing assembly are combined;

[0028] Figure 5 This is a schematic structural diagram of the outward expansion assembly and the leveling assembly of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the present invention when the outward moving member and the support bar are separated;

[0030] Figure 7 This is a schematic structural diagram of the external moving part of the present invention;

[0031] Figure 8 This is a schematic structural diagram of the first smoke exhaust fan of the present invention;

[0032] Figure 9 This is a schematic structural diagram of the second smoke exhaust fan of the present invention;

[0033] Figure 10 This is a structural schematic diagram of the second smoke exhaust fan of the present invention from another perspective.

[0034] In the figure: 1-movable bracket; 2-first smoke exhaust fan; 21-first groove; 22-first magnetic block; 23-chute; 3-second smoke exhaust fan; 31-second groove; 4-filter;

[0035] 5 - Outward expansion assembly; 51 - Moving part; 511 - Outward moving member; 5111 - First outward moving bar; 5112 - Second outward moving bar; 5113 - Guide bar; 5114 - Third outward moving bar; 5115 - Rack; 5116 - Telescopic rod; 5117 - Bump; 512 - Mounting bar; 5121 - Moving slot; 513 - Support bar; 5131 - Guide slot; 514 - Stopper; 52 - Driving part; 521 - First gear; 522 - Second gear; 523 - Belt connecting member; 524 - Handwheel;

[0036] 6-leveling assembly; 61-convex plate; 62-screw; 63-mounting piece; 631-moving bar; 632-nut seat; 633-limiting bar;

[0037] 7-cleaning piece; 71-elastic convex needle;

[0038] 8-stabilizing component; 81-second magnetic block; 82-spring; 83-pull rope. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Example 1: Please refer to Figures 1-10 As shown, the present invention provides a technical solution: a fire emergency rescue mobile smoke exhaust device, comprising a mobile bracket 1 and a first smoke exhaust fan 2 installed on the mobile bracket 1, and also comprising a second smoke exhaust fan 3, an outward expansion component 5, a leveling component 6 and a stabilizing component 8. The first smoke exhaust fan 2 and the second smoke exhaust fan 3 are both provided with a filter 4, and the second smoke exhaust fan 3 is provided with two, and the two second smoke exhaust fans 3 are respectively arranged on the front and rear sides of the first smoke exhaust fan 2, and the first smoke exhaust fan 2 and the second smoke exhaust fan 3 can be switched between the same column and the same column. When stored, they retract into a column to reduce the occupied space. When in use, they can be expanded outward. a row to increase the smoke exhaust efficiency; the outward expansion component 5 includes a moving part 51 and a driving part 52, and there are two moving parts 51, each connected to a second smoke exhaust fan 3, and the two second smoke exhaust fans 3 can be synchronously moved outward in opposite directions through the driving part 52; the leveling component 6 is provided on the moving part 51, and after the second smoke exhaust fan 3 in the same column moves outward, the second smoke exhaust fan 3 and the first smoke exhaust fan 2 are placed on the same horizontal line through the leveling component 6; after the second smoke exhaust fan 3 and the first smoke exhaust fan 2 are on the same horizontal line, the stabilizing component 8 is used to improve the stability of the connection to ensure stability during operation and prevent displacement.

[0041] Among them, see Figure 4-Figure 5The movable part 51 includes an outward moving member 511 movably mounted on the lower ends of the front and rear sides of the mounting seat of the first smoke exhaust fan 2, and a mounting strip 512 is fixed at the end of the outward moving member 511. The mounting strip 512 is fixed on the mounting seat of the corresponding second smoke exhaust fan 3. The bottom ends of the front and rear sides of the mounting seat of the first smoke exhaust fan 2 are fixed with a support strip 513. The outward moving member 511 slides with the support strip 513. Specifically, a guide groove 5131 is provided on the upper end surface of the support strip 513. The bottom end of the outward moving member 511 is connected to a guide strip 5113 that slides with the guide groove 5131, and the outward moving member 511 is connected to a The block 514 is used to prevent the outward moving part 511 from completely detaching from the first smoke exhaust fan 2. The front and rear sides of the mounting seat of the first smoke exhaust fan 2 are provided with a slide groove 23. The block 514 is located in the slide groove 23. When the outward moving part 511 moves outward, the mounting strip 512 drives the second smoke exhaust fan 3 installed thereon to move outward. The block 514 is always located in the slide groove 23 for movement, and cooperates with the sliding of the guide strip 5113 in the guide groove 5131. This two-way guiding mechanism limits the movement of the outward moving part 511 to a single direction. Therefore, the stability of the movement of the outward moving part 511 can be guaranteed, and it is not easy to shift.

[0042] See Figure 6-Figure 7 As shown, the outward moving member 511 includes a first outward moving bar 5111 and a second outward moving bar 5112. A rack 5115 is fixed to the side of the first outward moving bar 5111 facing the first smoke exhaust fan 2, and an axial receiving groove is provided in the first outward moving bar 5111. A third outward moving bar 5114 is fixed to one end of the second outward moving bar 5112 close to the first outward moving bar 5111. The third outward moving bar 5114 is inserted into the receiving groove, and a stopper 514 is fixed to the second outward moving bar 5112. A telescopic rod 5116 is installed on the upper end surface of the second outward moving bar 5112. The telescopic rod 5116 is preferably An electric telescopic rod is provided with a protrusion 5117 fixed on the upper end surface of the first outward moving strip 5111 and close to one end of the second outward moving strip 5112. The output end of the telescopic rod 5116 is connected to the protrusion 5117. When the outward moving member 511 moves outward to the point where it completely protrudes from the first smoke exhaust fan 2 and the block 514 is blocked by the end of the slide groove 23, the telescopic rod 5116 can be started at this time, and the telescopic rod 5116 can be used to continue to extend the first outward moving strip 5111, so that the first outward moving strip 5111 continues to move outward, so that the outward-moving second smoke exhaust fan 3 and the first smoke exhaust fan 2 do not overlap in the direction of extracting smoke.

[0043] See Figure 3-Figure 5As shown, the driving part 52 includes a first gear 521 and a second gear 522 rotatably mounted inside the mounting seat at the bottom end of the first smoke exhaust fan 2, the first gear 521 and the second gear 522 respectively mesh with the corresponding racks 5115, and a belt connector 523 is connected between the connecting shafts of the first gear 521 and the second gear 522, and a handwheel 524 is installed at the bottom end of the connecting shaft of the second gear 522. After the firefighters move the smoke exhaust device to the area to be exhausted, they can rotate the connecting shaft by the handwheel 524 to rotate the second gear 522, thereby synchronously driving the first gear 521 to rotate by using the belt connector 523, so that the two racks 5115 are synchronously moved outward, thereby realizing the outward movement of the first outward moving bar 5111, and then realizing the rapid outward expansion of the two second smoke exhaust fans 3.

[0044] See Figure 4-Figure 5 As shown, the leveling assembly 6 includes a convex plate 61 fixed to the outer wall of the mounting strip 512, and a screw rod 62 is installed on the convex plate 61. There are two convex plates 61, one end of the screw rod 62 is rotatably mounted on one convex plate 61, and the screw rod 62 passes through the other convex plate 61. A mounting piece 63 is connected between the lower end of the end of the second smoke exhaust fan 3 and the screw rod 62, and a movable groove 5121 for moving the mounting piece 63 is opened along the length direction on the mounting strip 512.

[0045] Among them, see Figure 10 As shown, the mounting member 63 includes a movable bar 631 fixed to the lower end of the second smoke exhaust fan 3, a nut seat 632 is installed on the outer wall of the movable bar 631, and the upper and lower walls of the movable bar 631 are fixed with limit bars 633, and a limit groove matching the limit bar 633 is opened in the movable groove 5121.

[0046] Through the above, after the second smoke exhaust fan 3 is expanded into place through the expansion assembly 5, the fire fighter can rotate the screw rod 62 and use the movement of the nut seat 632 outside the screw rod 62 to move the second smoke exhaust fan 3, so that the second smoke exhaust fan 3 on the front side moves backward, and the same operation is used to move the second smoke exhaust fan 3 on the rear side forward, so that the three smoke exhaust fans are on the same horizontal line in the same row. This can expand the smoke exhaust range while effectively reducing the occurrence of airflow turbulence and improving the smoke exhaust efficiency.

[0047] The exhaust fans that are on the same horizontal line and maintain appropriate spacing have relatively independent airflow paths, which can effectively avoid airflow interference between adjacent exhaust fans and enable each exhaust fan to perform better exhaust performance. Especially for some more regular exhaust channels, the advantage of this uniformity is more obvious.

[0048] See Figure 3-Figure 5 as well as Figure 8-Figure 9As shown, first grooves 21 are provided on both sides of the bottom mounting base of the first smoke exhaust fan 2. A first magnetic block 22 is fixed in the first groove 21. The outer end of the first magnetic block 22 is lower than the outer end of the first groove 21. A second groove 31 is provided on the side wall of the bottom mounting base of the second smoke exhaust fan 3.

[0049] The stabilizing component 8 includes a second magnetic block 81 arranged in the second groove 31. The first magnetic block 22 and the second magnetic block 81 are magnets that attract each other. A spring 82 is connected between the second magnetic block 81 and the inside of the second groove 31, and a pull rope 83 extending to the outside of the bottom mounting seat of the second smoke exhaust fan 3 is connected to the middle of the inner end of the second magnetic block 81.

[0050] Through the above, in the process of the second smoke exhaust fan 3 moving to the same level through the leveling component 6, as the second smoke exhaust fan 3 moves, the first magnetic block 22 in the first groove 21 will attract the second magnetic block 81. When the second magnetic block 81 and the first magnetic block 22 completely overlap, the first magnetic block 22 can attract the end of the second magnetic block 81 to completely enter the first groove 21. The end of the second magnetic block 81 can be blocked by the first groove 21, limiting further movement, indicating that it has moved into place, which can play a role in determining that it is in place. Secondly, the end of the second magnetic block 81 is in the first groove 21, which plays a role in limiting. When the second smoke exhaust fan 3 is running, it can avoid the second smoke exhaust fan 3 from shifting back and forth and up and down, thereby ensuring stability.

[0051] In addition, when it is not needed, the staff only needs to use the pull rope 83 to pull the second magnetic block 81 to separate the second magnetic block 81 from the first magnetic block 22, and then use the leveling component 6 to move the second smoke exhaust fan 3 to the initial misaligned state, and then use the external expansion component 5 to retract the second smoke exhaust fan 3 and attach it to the first smoke exhaust fan 2, which can effectively reduce the occupied space and facilitate storage.

[0052] Example 2: Please refer to Figure 3 as well as Figures 8-10 As shown, this embodiment is extended on the basis of embodiment 1: the fire emergency rescue mobile smoke exhaust device also includes a cleaning part 7, the cleaning part 7 is an arc-shaped scraper strip, the cleaning part 7 is fixed on the front second smoke exhaust fan 3 and the first smoke exhaust fan 2, and the outer wall of the cleaning part 7 is fixed with multiple elastic protruding pins 71.

[0053] Through the above, in the process of expanding or retracting the second smoke exhaust fan 3 using the expansion component 5, the cleaning component 7 can just scrape the smoke inlet surface filter 4 of the first smoke exhaust fan 2 and the rear second smoke exhaust fan 3. As the cleaning component 7 moves, it generates friction with the surface of the filter 4, thereby effectively removing the smoke attached to the filter 4, greatly reducing the workload of subsequent cleaning that requires the use of other special tools.

[0054] Secondly, when the cleaning part 7 moves, the elastic convex needle 71 can enter the hole of the filter 4, thereby improving the effect of cleaning the hole of the filter 4, and the elastic convex needle 71 can also be set to be rotatable, so that after the elastic convex needle 71 enters the pore of the filter 4, it can rotate slightly through friction to carry out more comprehensive and in-depth cleaning of the inside of the pore, further optimizing the cleaning effect.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0056] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A mobile smoke exhaust device for fire emergency rescue, comprising a mobile bracket (1) and a first smoke exhaust fan (2) mounted thereon, characterized in that: Also included are: Two second smoke exhaust fans (3), the two second smoke exhaust fans (3) are respectively arranged at the front and rear sides of the first smoke exhaust fan (2), and the first smoke exhaust fan (2) and the second smoke exhaust fan (3) can be switched between the same column and the same row states; An outward expansion component (5), the outward expansion component (5) comprising a moving part (51) and a driving part (52), the moving parts (51) being provided with two, each connected to a second smoke exhaust fan (3), and the driving part (52) enabling the two second smoke exhaust fans (3) to move outward synchronously in opposite directions; A leveling assembly (6) is provided on the moving part (51), and after the second smoke exhaust fan (3) in the same row moves outward, the second smoke exhaust fan (3) and the first smoke exhaust fan (2) are placed on the same horizontal line by the leveling assembly (6); A stabilizing component (8) is used to improve the stability of the connection after the second smoke exhaust fan (3) and the first smoke exhaust fan (2) are on the same horizontal line.

2. The mobile smoke exhaust device for fire emergency rescue according to claim 1, characterized in that: The movable part (51) includes an outward moving member (511) movably mounted on the lower ends of the front and rear sides of the mounting seat of the first smoke exhaust fan (2), a mounting strip (512) is fixed to the end of the outward moving member (511), and a support strip (513) is fixed to the bottom ends of the front and rear sides of the mounting seat of the first smoke exhaust fan (2), the outward moving member (511) slides to fit the support strip (513), and a stopper (514) is connected to the outward moving member (511) for preventing the outward moving member (511) from completely detaching from the first smoke exhaust fan (2).

3. The mobile smoke exhaust device for fire emergency rescue according to claim 2, characterized in that: The outward moving member (511) includes a first outward moving strip (5111) and a second outward moving strip (5112), a rack (5115) being fixed on a side of the first outward moving strip (5111) facing the first smoke exhaust fan (2), and an axial receiving groove being provided on the first outward moving strip (5111), a third outward moving strip (5114) being fixed on an end of the second outward moving strip (5112) close to the first outward moving strip (5111), the third outward moving strip (5114) being inserted into the receiving groove, and the stop block (514) being fixed on the second outward moving strip (5112).

4. The mobile smoke exhaust device for fire emergency rescue according to claim 3, characterized in that: A telescopic rod (5116) is installed on the upper end surface of the second outward moving strip (5112), a protrusion (5117) is fixed on the upper end surface of the first outward moving strip (5111) and close to one end of the second outward moving strip (5112), and the output end of the telescopic rod (5116) is connected to the protrusion (5117).

5. The mobile smoke exhaust device for fire emergency rescue according to claim 3, characterized in that: The driving part (52) includes a first gear (521) and a second gear (522) rotatably mounted inside a mounting base at the bottom end of the first smoke exhaust fan (2), the first gear (521) and the second gear (522) respectively meshing with corresponding racks (5115), and a belt connector (523) is connected between the connecting shafts of the first gear (521) and the second gear (522), and a hand wheel (524) is mounted at the bottom end of the connecting shaft of the second gear (522).

6. The mobile smoke exhaust device for fire emergency rescue according to claim 2, characterized in that: The leveling assembly (6) includes a convex plate (61) fixed to the outer wall of the mounting strip (512), a screw rod (62) is installed on the convex plate (61), a mounting member (63) is connected between the lower end of the end of the second smoke exhaust fan (3) and the screw rod (62), and a movable groove (5121) for moving the mounting member (63) is provided on the mounting strip (512) along the length direction.

7. The mobile smoke exhaust device for fire emergency rescue according to claim 6, characterized in that: The mounting member (63) includes a moving bar (631) fixed to the lower end of the second smoke exhaust fan (3), a nut seat (632) is installed on the outer wall of the moving bar (631), and the upper and lower walls of the moving bar (631) are fixed with a limiting bar (633), and a limiting groove matching the limiting bar (633) is opened in the moving groove (5121).

8. The mobile smoke exhaust device for fire emergency rescue according to claim 1, characterized in that: A first groove (21) is provided on both sides of the bottom mounting seat of the first smoke exhaust fan (2), a first magnetic block (22) is fixed in the first groove (21), an outer end of the first magnetic block (22) is lower than an outer end of the first groove (21), and a second groove (31) is provided on the side wall of the bottom mounting seat of the second smoke exhaust fan (3); The stabilizing component (8) includes a second magnetic block (81) arranged in the second groove (31), a spring (82) is connected between the second magnetic block (81) and the inside of the second groove (31), and a pull rope (83) extending to the outside of the bottom end mounting seat of the second smoke exhaust fan (3) is connected to the middle of the inner end of the second magnetic block (81).

9. The mobile smoke exhaust device for fire emergency rescue according to claim 2, characterized in that: The front and rear sides of the mounting seat of the first smoke exhaust fan (2) are both provided with a slide groove (23), the stopper (514) is located in the slide groove (23), the upper end surface of the support bar (513) is provided with a guide groove (5131), and the bottom end of the outward moving part (511) is connected to a guide bar (5113) that slides and fits the guide groove (5131).

10. The mobile smoke exhaust device for fire emergency rescue according to claim 1, characterized in that: It also includes a cleaning piece (7), which is an arc-shaped scraper. The second smoke exhaust fan (3) and the first smoke exhaust fan (2) on the front side are both provided with the cleaning piece (7), and the outer wall of the cleaning piece (7) is fixed with a plurality of elastic protruding pins (71).

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