A fire smoke exhaust duct anti-sway support structure

Abstract

The present invention relates to the technical field of fire smoke exhaust duct installation. The present invention discloses a fire smoke exhaust duct anti-sway support structure, which is applied to the fire smoke exhaust duct and includes: an upper mounting plate, which is located above the fire smoke exhaust duct; a side fixing assembly, wherein a plurality of side fixing assemblies are slidably mounted on the bottom end of the upper mounting plate, and the side fixing assembly includes an adjustment seat, an upper adjustment plate and a lower adjustment plate which are installed on the top and bottom ends of the adjustment seat, two fixing plate assemblies are arranged one above and one below, and are respectively connected to the upper adjustment plate and the lower adjustment plate, the fire smoke exhaust duct is clamped between the two fixing plate assemblies and abuts against the adjustment seat, the two fixing plate assemblies can rotate to the same side, thereby reserving a replacement space for the fire smoke exhaust duct, and a bow-shaped limit rod is connected to the two fixing plate assemblies. The fire smoke exhaust duct anti-sway support structure disclosed by the present invention can facilitate the replacement of the fire smoke exhaust duct.

Description

Technical Field

[0001] The invention relates to the technical field of fire smoke exhaust duct installation, in particular to an anti-sway support structure for a fire smoke exhaust duct. Background Art

[0002] The fire smoke exhaust duct is a smoke exhaust device inside the building. When a fire occurs, it can discharge smoke and harmful gases in time. The fire smoke exhaust duct is generally installed on the indoor ceiling, so it needs to be supported to prevent the fire smoke exhaust duct from loosening.

[0003] Chinese patent CN221121252 U discloses a fire smoke exhaust air duct anti-sway support structure, including a mounting plate, a fixed plate, a fixed support frame, a sliding plate and a sliding support frame, both sides of the bottom of the mounting plate are connected with fixed plates, the bottoms of the two fixed plates are commonly connected with a fixed support frame for supporting the fire smoke exhaust air duct, both sides of the bottom of the mounting plate are provided with slide grooves, four sliding plates are slidably arranged in the slide grooves, and the bottoms of the two sliding plates facing each other are commonly connected with a sliding support frame for supporting the fire smoke exhaust air duct. The utility model can support the fire smoke exhaust air duct through the fixed support frame and the sliding support frame to prevent the fire smoke exhaust air duct from shaking, and the sliding support frame can be unfolded by pulling the rightmost sliding support frame to the right, so as to facilitate supporting other positions of the fire smoke exhaust air duct.

[0004] When replacing the fire exhaust duct, the above-mentioned anti-sway support structure needs to move the sliding support frame to the leftmost side of the mounting plate so that the fire exhaust duct can be easily pulled out and replaced. After the replacement is completed, the sliding support frame needs to be evenly distributed a second time, which makes the replacement of the fire exhaust duct more cumbersome. Summary of the invention

[0005] In order to achieve the above-mentioned object, the present invention discloses a fire smoke exhaust air duct anti-sway support structure, which is applied to the fire smoke exhaust air duct, comprising:

[0006] An upper mounting plate, the upper mounting plate is located above the fire smoke exhaust duct;

[0007] A side fixing assembly, multiple side fixing assemblies can be slidably installed on the bottom end of the upper mounting plate, the side fixing assembly includes an adjustment seat, an upper adjustment plate and a lower adjustment plate installed on the top and bottom ends of the adjustment seat, two fixing plate assemblies are arranged one above and one below, and are respectively connected to the upper adjustment plate and the lower adjustment plate, the fire smoke exhaust duct is clamped between the two fixing plate assemblies and abuts against the adjustment seat, the two fixing plate assemblies can rotate to the same side, thereby reserving space for disassembly and replacement of the fire smoke exhaust duct, and the bow-shaped limit rod is connected to the two fixing plate assemblies.

[0008] Preferably, a slide groove is provided at the bottom end of the upper mounting plate along its length direction, the top end of the slide rod is slidably connected in the slide groove, and the bottom end of the slide rod is fixedly connected to the adjustment seat.

[0009] Preferably, the upper adjusting plate and the lower adjusting plate slide against each other, the top end of the upper adjusting plate is connected to one of the fixed plate assemblies, the bottom end of the upper adjusting plate is provided with an adjustment seat, the bottom end of the lower adjusting plate is connected to the other fixed plate assemblies, the top end of the lower adjusting plate is provided with an adjustment seat, the upper slider is connected to the top end of the lower adjusting plate, the top end of the upper adjusting plate is provided with an upper slider, the lower slider is connected to the bottom end of the upper adjusting plate, and the top end of the upper adjusting plate is provided with a lower slider.

[0010] Preferably, the fixing plate assembly comprises:

[0011] Fixed seat;

[0012] The rotating plate is set as a cavity structure, one end of the rotating plate is rotatably installed in the fixed seat through the installation shaft, and the other end of the rotating plate is open to allow the end of the bow-shaped limiting rod to extend into;

[0013] A limit block is installed at one end of the rotating plate to limit the 90° rotation of the rotating plate;

[0014] A limit clamp is installed in the rotating plate and is used to limit the bow-shaped limit rod.

[0015] Preferably, the limiting card comprises:

[0016] A manual rotating rod 1 extends from one end of the rotating plate into the rotating plate, and a fixing seat is provided with an avoidance groove for avoiding the manual rotating rod 1 at the end away from the rotating plate;

[0017] A square screw sleeve, which is located in the rotating plate and is threadedly sleeved on a manual rotating rod;

[0018] A transverse rack, which is located inside the rotating plate and connected to the square screw sleeve via a return spring;

[0019] The transmission gear is located in the rotating plate and meshes with the transverse rack. The end of the bow-shaped limiting rod is provided with a transmission tooth block adapted to the transmission gear.

[0020] Preferably, the side fixing assembly also includes: a transmission screw rotatably mounted on the side end of the adjustment seat, a transmission screw block sleeved on the transmission screw, a pull rod installed opposite to the transmission screw block, the pull rod is connected to the bottom end of the fixed seat away from the transmission screw block end, and a side mounting plate is also installed on the adjustment seat near the transmission screw end, a manual rotating rod 2 is rotatably mounted on the side mounting plate, one of the meshing bevel gears is mounted on the manual rotating rod 2, and the other bevel gear is mounted on the transmission screw, and a stop block is installed on the transmission screw end away from the adjustment seat.

[0021] Preferably, a side screw is rotatably mounted on the adjustment seat, and the side screw is evenly distributed with positive-hand threads and reverse-hand threads with opposite rotation directions. The upper slider is sleeved on the positive-hand threads, and the lower slider is sleeved on the reverse-hand threads.

[0022] Preferably, a handle is installed on the adjustment seat away from the end of the fire smoke exhaust duct.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The present invention provides a fire smoke exhaust duct anti-sway support structure. When the fire smoke exhaust duct needs to be replaced, it is only necessary to remove the bow-shaped limit rod, and then rotate the two fixing plate assemblies to the same side, thereby reserving a replacement space for the fire smoke exhaust duct. After the fire smoke exhaust duct is removed from its bottom end, the two fixing plate assemblies rotate in the same direction in the opposite direction, thereby clamping the fire smoke exhaust duct, and then reinstall the bow-shaped limit rod. This facilitates the replacement of the fire smoke exhaust duct.

[0025] (2) The present invention provides an anti-sway support structure for a fire smoke exhaust duct. After manually rotating the rotating plate, the rotating plate rotates around the installation axis to a state where the limit block is perpendicular to the inner wall of the fixed seat, and the manual rotating rod is clamped in the avoidance groove. After the rotating plate is rotated 90 degrees in the opposite direction, the manual rotating rod exits the avoidance groove, the limit block turns to be close to the inner wall of the fixed seat, and the rotating plate turns to a state parallel to the fire smoke exhaust duct. Manually extend the end of the bow-shaped limit rod from the other end of the rotating plate into the rotating plate, and the transmission tooth block at the end of the bow-shaped limit rod meshes with the transmission gear, thereby driving the transmission gear to rotate, and the transmission gear drives the transverse rack meshing with it to move in the rotating plate in the opposite direction of the bow-shaped limit rod. Because the square screw sleeve is installed on the manual rotating rod one, when the manual rotating rod does not move, the square screw sleeve does not move. When the transverse rack connected to the square screw sleeve through the return spring moves, the return spring stretches until the bow-shaped limit rod is against the fire smoke exhaust air duct, and the return spring stops stretching. At this time, it is only necessary to manually rotate the manual rotating rod one with a little force. The manual rotating rod drives the square screw sleeve mounted thereon to slide against the inner wall of the rotating plate, and the return spring gradually shrinks to normal state. After the square screw sleeve is re-set on the transverse rack, the resistance increases, thereby it can be judged that the bow-shaped limit rod has been locked in the rotating plate. When the lock of the bow limit rod is released, the square screw sleeve is rotated in the opposite direction, and the square screw sleeve is released from the transverse rack, and the reset spring is stretched. At this time, the bow limit rod is pulled out, and the bow limit rod transmits the force in the contraction direction of the reset spring to the transverse rack through the transmission gear. In this way, under the double action of the reset and contraction of the reset spring, the bow limit rod can be pulled out more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the installation of the present invention and the fire smoke exhaust duct;

[0028] Figure 2 It is a front view of the present invention;

[0029] Figure 3 It is a top view of the present invention (including the fire smoke exhaust duct);

[0030] Figure 4 It is a structural schematic diagram of the fixing plate assembly of the present invention;

[0031] Figure 5 for Figure 4 The enlarged view of the middle label A;

[0032] Figure 6 It is a schematic diagram of assembling the transverse rack and the arcuate limiting rod in the rotating plate of the present invention;

[0033] Figure 7 It is a schematic diagram of assembling the side screw rod, the upper slider and the lower slider of the present invention.

[0034] In the figure: 1. Fire smoke exhaust duct; 2. Upper mounting plate; 3. Side fixing assembly; 31. Adjustment seat; 32. Upper adjustment plate; 33. Lower adjustment plate; 34. Fixed plate assembly; 35. Slide rod; 36. Upper slider; 37. Lower slider; 38. Bow-shaped limit rod; 40. Transmission gear; 41. Fixed seat; 42. Rotating plate; 43. Mounting shaft; 44. Limit block; 45. Manual rotating rod 1; 46. Avoidance groove; 47. Square screw sleeve; 48. Transverse rack; 49. Reset spring; 51. Transmission gear block; 52. Transmission screw; 53. Transmission screw block; 54. Pull rod; 55. Side mounting plate; 56. Manual rotating rod 2; 57. Bevel gear; 58. Side screw; 59. Handle. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0036] Example

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] like Figures 1 to 7 As shown, the present embodiment provides a fire smoke exhaust air duct anti-sway support structure, which is applied to the fire smoke exhaust air duct 1, and includes:

[0039] An upper mounting plate 2, the upper mounting plate 2 is located above the fire smoke exhaust duct 1;

[0040] A side fixing assembly 3, multiple side fixing assemblies 3 can be slidably installed on the bottom end of the upper mounting plate 2, the side fixing assembly 3 includes an adjustment seat 31, an upper adjustment plate 32 and a lower adjustment plate 33 which are installed on the top and bottom ends of the adjustment seat 31, two fixing plate assemblies 34 are arranged one above and one below, and are respectively connected to the upper adjustment plate 32 and the lower adjustment plate 33, the fire smoke exhaust duct 1 is clamped between the two fixing plate assemblies 34 and abuts against the adjustment seat 31, the two fixing plate assemblies 34 can rotate to the same side, thereby reserving a replacement space for the fire smoke exhaust duct 1, and a bow-shaped limit rod 38 is connected to the two fixing plate assemblies 34.

[0041] The working principle and beneficial effects of the above technical solution are:

[0042] The present invention provides a fire smoke exhaust duct anti-sway support structure. When the fire smoke exhaust duct 1 needs to be replaced, it is only necessary to remove the bow-shaped limit rod 38, and then the two fixing plate assemblies 34 are rotated to the same side, thereby reserving a replacement space for the fire smoke exhaust duct 1. After the fire smoke exhaust duct 1 is taken down from its bottom end, the two fixing plate assemblies 34 are rotated in the same side in the opposite direction, thereby clamping the fire smoke exhaust duct 1, and then the bow-shaped limit rod 38 is reinstalled. The fire smoke exhaust duct anti-sway support structure disclosed by the present invention can easily complete the replacement of the fire smoke exhaust duct 1.

[0043] Furthermore, by adjusting the upper adjustment plate 32 and the lower adjustment plate 33 to move toward or away from each other, the vertical height of the upper and lower fixing plate assemblies 34 can be adjusted, thereby facilitating the fixing of fire smoke exhaust ducts 1 of different sizes.

[0044] Furthermore, when replacing the fire smoke exhaust duct 1 of a small size, the fire smoke exhaust duct 1 can be taken down from its side end only after the bow-shaped limiting rod 38 is removed.

[0045] In one embodiment, a slide groove is provided at the bottom end of the upper mounting plate 2 along its length direction, the top end of the slide rod 35 is slidably connected in the slide groove, and the bottom end of the slide rod 35 is fixedly connected to the adjustment seat 31 .

[0046] The beneficial effects of the above technical solution are:

[0047] By manually moving the adjustment seat 31 , the slide bar 35 connected to the adjustment seat 31 is driven to adjust the position of the bottom end of the upper mounting plate 2 , thereby facilitating the adjustment of the position distribution of the anti-sway support structure at the bottom end of the upper mounting plate 2 .

[0048] In one embodiment, the upper adjustment plate 32 and the lower adjustment plate 33 slide against each other, the top end of the upper adjustment plate 32 is connected to one of the fixed plate assemblies 34, the bottom end of the upper adjustment plate 32 is penetrated by an adjustment seat 31, the bottom end of the lower adjustment plate 33 is connected to another of the fixed plate assemblies 34, the top end of the lower adjustment plate 33 is penetrated by an adjustment seat 31, the upper slider 36 is connected to the top end of the lower adjustment plate 33, the top end of the upper adjustment plate 33 is penetrated by an upper slider 36, the lower slider 37 is connected to the bottom end of the upper adjustment plate 32, and the top end of the upper adjustment plate 33 is penetrated by a lower slider 37.

[0049] The working principle and beneficial effects of the above technical solution are:

[0050] The upper adjustment plate 32 and the lower adjustment plate 33 are installed on the adjustment seat 31 so as to be displaceable up and down, and the upper adjustment plate 32 and the lower adjustment plate 33 slide against each other. When the upper adjustment plate 32 slides downward, the lower slider 37 connected thereto is driven to slide downward synchronously, and when the lower adjustment plate 33 slides upward, the upper slider 36 connected thereto is driven to slide upward synchronously, thereby realizing the stable sliding of the upper adjustment plate 32 and the lower adjustment plate 33, thereby realizing the stable adjustment of the distance between the two fixed plate assemblies 34 connected to the upper adjustment plate 32 and the lower adjustment plate 33 and distributed one above and one below. By adjusting the distance between the two fixed plate assemblies 34, the anti-sway support of the fire smoke exhaust air duct 1 is realized. The middle section of the bow-shaped limit rod 38 is a retractable structure that can be pulled out, so as to facilitate the adjustment of the length of the bow-shaped limit rod 38.

[0051] Furthermore, the fire smoke exhaust duct 1 is composed of a number of sub-tubes. After a sub-tube is disassembled and replaced, the upper adjustment plate 32 and the lower adjustment plate 33 drive the two fixed plate assemblies 34 distributed one above and one below to move towards each other, thereby driving the sub-tube to rise. After the two fixed plate assemblies 34 complete the fixation of the top and bottom ends of the sub-tube, the sub-tube is lifted to the same height as the adjacent sub-tube, so that the splicing and fixation of the sub-tube can be completed conveniently.

[0052] In one embodiment, the fixing plate assembly 34 includes:

[0053] Fixed seat 41;

[0054] The rotating plate 42 is configured as a hollow structure, one end of the rotating plate 42 is rotatably mounted in the fixed seat 41 via a mounting shaft 43, and the other end of the rotating plate 42 is open to allow the end of the bow-shaped limiting rod 38 to extend therein;

[0055] A limit block 44, which is mounted on one end of the rotating plate 42 to limit the 90° rotation of the rotating plate 42;

[0056] The limiting clamp is installed in the rotating plate 42 and is used to limit the bow-shaped limiting rod 38.

[0057] The working principle and beneficial effects of the above technical solution are:

[0058] After the rotating plate 42 rotates around the mounting shaft 43 until the limit block 44 is perpendicular to the inner wall of the fixing seat 41, the rotating plate 42 is perpendicular to the fire smoke exhaust air duct 1. At this time, the end of the bow-shaped limit rod 38 is manually extended from the other end of the rotating plate 42 into the rotating plate 42, and the limit clamp in the rotating plate 42 completes the fixation of the bow-shaped limit rod 38, so that a square frame structure composed of the upper adjustment plate 32, the lower adjustment plate 33, the two rotating plates 42 and the bow-shaped limit rod 38 can be formed, and the fire smoke exhaust air duct 1 is fixed in the square frame structure to reduce the possibility of shaking. When the size of the smoke exhaust air duct 1 is not large, there is no need to install the bow-shaped limit rod 38. Only the C-shaped structure composed of the upper adjustment plate 32, the lower adjustment plate 33 and the two rotating plates 42 can complete the fixation of the smoke exhaust air duct 1.

[0059] In one embodiment, the limit card comprises:

[0060] A manual rotating rod 45 extends from one end of the rotating plate 42 into the rotating plate 42, and an escape groove 46 for escaping the manual rotating rod 45 is formed at the end of the fixed seat 41 away from the rotating plate 42;

[0061] A square screw sleeve 47, which is located inside the rotating plate 42 and is threadedly sleeved on a manual rotating rod 45;

[0062] A transverse rack 48, which is located inside the rotating plate 42 and connected to the square screw sleeve 47 via a return spring 49;

[0063] The transmission gear 40 is located in the rotating plate 42 and meshes with the transverse rack 48 . The end of the arcuate limiting rod 38 is provided with a transmission tooth block 51 adapted to the transmission gear 40 .

[0064] The working principle and beneficial effects of the above technical solution are:

[0065] After manually rotating the rotating plate 42, the rotating plate 42 rotates around the mounting shaft 43 to a state where the limit block 44 is perpendicular to the inner wall of the fixing seat 41, and the manual rotating rod 45 is clamped in the avoidance groove 46. After the rotating plate 42 is rotated 90 degrees in the opposite direction, the manual rotating rod 45 withdraws from the avoidance groove 46, the limit block 44 turns to be close to the inner wall of the fixing seat 41, and the rotating plate 42 turns to be parallel to the fire smoke exhaust duct 1.

[0066] Manually extend the end of the bow-shaped limit rod 38 from the other end of the rotating plate 42 into the rotating plate 42, and the transmission tooth block 51 at the end of the bow-shaped limit rod 38 meshes with the transmission gear 40, thereby driving the transmission gear 40 to rotate, and the transmission gear 40 drives the transverse rack 48 meshed with it to move in the rotating plate 42 in the opposite direction to the bow-shaped limit rod 38. Because the square screw sleeve 47 is installed on the manual rotating rod 45, when the manual rotating rod 45 does not move, the square screw sleeve 47 does not move, and the reset spring 49 is connected to the square screw sleeve 47. When the transverse rack 48 connected to the screw sleeve 47 is in motion, the return spring 49 is stretched until the bow-shaped limit rod 38 abuts against the fire smoke exhaust duct 1, and the return spring 49 stops stretching. At this time, it is only necessary to manually rotate the manual rotating rod 45 with a little force. The manual rotating rod 45 drives the square screw sleeve 47 sleeved thereon to slide against the inner wall of the rotating plate 42, and the return spring 49 gradually shrinks to a normal state. After the square screw sleeve 47 is re-set against the transverse rack 48, the resistance increases, thereby determining that the bow-shaped limit rod 38 has been locked in the rotating plate 42.

[0067] When the lock of the bow limit rod 38 is released, the square screw sleeve 47 is rotated in the opposite direction, and the square screw sleeve 47 is released from the transverse rack 48, and the return spring 49 is stretched. At this time, the bow limit rod 38 is pulled out, and the bow limit rod 38 transmits the force in the contraction direction of the return spring 49 to the transverse rack 48 through the transmission gear 40. In this way, under the double action of the return and contraction of the return spring 49, the bow limit rod 38 can be pulled out more conveniently.

[0068] In one embodiment, the side fixing assembly 3 also includes: a transmission screw 52 rotatably mounted on the side end of the adjustment seat 31, a transmission screw block 53 is sleeved on the transmission screw 52, ​​a pull rod 54 is oppositely mounted on the transmission screw block 53, the pull rod 54 is connected to the bottom end of the fixing seat 41 away from the transmission screw block 53, and a side mounting plate 55 is also installed on the end of the adjustment seat 31 near the transmission screw 52, ​​a manual rotating rod 56 is rotatably mounted on the side mounting plate 55, and a pair of meshing bevel gears 57, one of the bevel gears 57 is mounted on the manual rotating rod 56, and the other bevel gear 57 is mounted on the transmission screw 52, ​​and a stop block is installed on the end of the transmission screw 52 away from the adjustment seat 31.

[0069] The working principle and beneficial effects of the above technical solution are:

[0070] After the manual rotating rod 56 is manually rotated, the manual rotating rod 56 drives the transmission screw 52 to rotate through the meshing bevel gear 57, and the transmission screw 52 drives the transmission screw block 53 sleeved thereon to move in the direction close to the stop block, and the transmission screw block 53 pulls the upper adjustment plate 32 and the lower adjustment plate 33 on the adjustment seat 31 to move in the direction close to each other through the pull rod 54. In this way, the distance between the two rotating plates 42 distributed one above and one below can be adjusted, which is suitable for the fixed connection of smoke exhaust ducts 1 of different sizes.

[0071] In one embodiment, a side screw 58 is rotatably mounted on the adjustment seat 31, and the side screw 58 is evenly distributed with positive and negative threads with opposite rotation directions. The upper slider 36 is sleeved on the positive threads, and the lower slider 37 is sleeved on the negative threads.

[0072] The working principle and beneficial effects of the above technical solution are:

[0073] When the upper adjustment plate 32 slides downward, it drives the lower slider 37 connected to it to slide downward synchronously. The lower slider 37 drives the side screw 58 to rotate on the adjustment seat 31 through the counter-rotating thread connected to it. Synchronously, the upper slider 36 connected to the side screw 58 through the forward thread slides upward, thereby driving the lower adjustment plate 33 connected to the upper slider 36 to slide upward, so that the upper adjustment plate 32 and the lower adjustment plate 33 can be further stable.

[0074] In one embodiment, a handle 59 is installed at the end of the adjustment seat 31 away from the fire smoke exhaust duct 1 .

[0075] The beneficial effects of the above technical solution are:

[0076] The arrangement of the handle 59 facilitates the manual pulling of the adjustment seat 31 for displacement.

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A fire smoke exhaust duct anti-sway support structure, applied to a fire smoke exhaust duct (1), characterized in that: include: An upper mounting plate (2) is located above the fire smoke exhaust duct (1); a plurality of side fixing assemblies (3) are slidably mounted on the bottom end of the upper mounting plate (2); the side fixing assembly (3) comprises an adjustment seat (31), an upper adjustment plate (32) and a lower adjustment plate (33) which are installed through the top and bottom ends of the adjustment seat (31); two fixing plate assemblies (34) are arranged one above the other and are respectively connected to the upper adjustment plate (32) and the lower adjustment plate (33); the fire smoke exhaust duct (1) is sandwiched between the two fixing plate assemblies (34) and abuts against the adjustment seat (31); the two fixing plate assemblies (34) can rotate to the same side, thereby reserving a space for disassembly and replacement of the fire smoke exhaust duct (1); a bow-shaped limiting rod (38) is connected to the two fixing plate assemblies (34); the bottom end of the upper mounting plate (2) is along the A slide groove is provided in the length direction thereof, the top end of the slide rod (35) is slidably connected in the slide groove, and the bottom end of the slide rod (35) is fixedly connected to the adjustment seat (31); the upper adjustment plate (32) and the lower adjustment plate (33) slide against each other, the top end of the upper adjustment plate (32) is connected to one of the fixed plate assemblies (34), the bottom end of the upper adjustment plate (32) is penetrated by the adjustment seat (31), the bottom end of the lower adjustment plate (33) is connected to the other fixed plate assembly (34), the top end of the lower adjustment plate (33) is penetrated by the adjustment seat (31), the upper slider (36) is connected to the top end of the lower adjustment plate (33), the top end of the upper adjustment plate (32) is penetrated by the upper slider (36), the lower slider (37) is connected to the bottom end of the upper adjustment plate (32), and the top end of the upper adjustment plate (32) is penetrated by the lower slider (37); The fixed plate assembly (34) comprises: a fixed seat (41); a rotating plate (42) being provided as a hollow structure, one end of the rotating plate (42) being rotatably mounted in the fixed seat (41) via a mounting shaft (43), and the other end of the rotating plate (42) being provided in an open manner so as to allow the end of the bow-shaped limiting rod (38) to extend therein; a limiting block (44) being installed at one end of the rotating plate (42) so as to limit the 90° rotation of the rotating plate (42); A limit clamp, which is installed in the rotating plate (42) and is used to limit the bow-shaped limit rod (38); The limit clamp comprises: a manual rotating rod (45), the rotating rotating rod (45) extends from one end of the rotating plate (42) into the rotating plate, and a fixing seat (41) is provided with an escape groove (46) for evading the manual rotating rod (45) at the end away from the rotating plate (42); a square screw sleeve (47) is located in the rotating plate (42) and is threadedly sleeved on the manual rotating rod (45); a transverse rack (48) is located in the rotating plate (42) and is connected to the transverse rack (47) through a return spring (49); a transmission gear (40) is located in the rotating plate (42) and meshes with the transverse rack (48), and a transmission gear block (51) adapted to the transmission gear (40) is provided at the end of the bow-shaped limit rod (38); The side fixing assembly (3) further comprises: a transmission screw (52) rotatably mounted on the side end of the adjustment seat (31); a transmission screw block (53) sleeved on the transmission screw (52); a pull rod (54) oppositely mounted on the transmission screw block (53); an end of the pull rod (54) away from the transmission screw block (53) is connected to the bottom end of the fixing seat (41); a side mounting plate (55) is further mounted on the end of the adjustment seat (31) close to the transmission screw (52); a manual rotating rod (56) is rotatably mounted on the side mounting plate (55); one of the meshing helical gears (57) is mounted on the manual rotating rod (56), and the other helical gear (57) is mounted on the transmission screw (52); and a stop block is mounted on the end of the transmission screw (52) away from the adjustment seat (31); A side screw (58) is rotatably mounted on the adjustment seat (31), and the side screw (58) is evenly distributed with positive rotation threads and reverse rotation threads of opposite rotation directions. The upper slider (36) is sleeved on the positive rotation threads, and the lower slider (37) is sleeved on the reverse rotation threads.

2. The fire smoke exhaust duct anti-sway support structure according to claim 1, characterized in that: A handle (59) is installed at the end of the adjustment seat (31) away from the fire smoke exhaust duct (1).

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