Equipment for vertically transporting and hoisting air pipe in narrow shaft

Abstract

The invention relates to the technical field of transportation and hoisting, and discloses equipment for vertically transporting and hoisting an air duct in a narrow hoistway, the equipment comprises an air duct climbing frame vertically moving in the hoistway, the air duct climbing frame comprises a climbing frame main body and a support frame, the support frame is installed at the bottom of the climbing frame main body, the climbing frame main body is provided with a receding hole for the air duct to pass through, and the receding hole is communicated with the air duct climbing frame. An air pipe support is installed on the outer vertical face of the wall of the narrow hoistway, an automatic reset mechanism is arranged on the supporting frame, and the automatic reset mechanism is used for detachably supporting the supporting frame on the air pipe support. Through the structural design of the air pipe climbing frame, the structural design of the supporting frame and the structural design of the automatic reset mechanism, it is guaranteed that a worker can use the air pipe climbing frame as an operation face in the air pipe installation process, and the operation safety of the worker is guaranteed; meanwhile, after the air pipe support is installed, the automatic reset mechanism enables the air pipe climbing frame to be erected on the air pipe support to serve as an operation face of workers.

Description

Technical Field

[0001] The invention relates to the technical field of transportation and hoisting, and in particular to a device for vertical transportation and hoisting of air ducts in narrow shafts. Background Art

[0002] Ventilation and air-conditioning systems are important components of building design. The transportation and hoisting of air ducts becomes a key process during the construction process. Manual hoisting is not only difficult to operate, but also requires a lot of physical strength from the staff.

[0003] Since the air duct is large in size and consists of multiple sections, the operating space of the shaft for installing the air duct on the wall facade is relatively narrow, such as Figure 1 and Figure 2 As shown, the staff needs to carry out operations such as fume exhaust duct transportation, riveting, and bracket installation on the exterior wall of the building;

[0004] In the prior art installation method, the duct handling operation is troublesome, and it is not convenient for the workers to install and rivet the duct and duct bracket, and the workers have low safety during operation. The work that the workers need to complete during the duct installation process includes at least the installation of the duct bracket, the hoisting of the multi-section duct, and the connection between the multi-section duct. Figure 1 and Figure 2 As shown, a plurality of first platforms 11 and second platforms 12 are arranged on the outer facade of a conventional wall, and the air duct 13 is installed on the inner side of the first platform 11 and the second platform 12. Although these platforms can be used as operating positions for staff, these platforms will also affect the hoisting of the air duct 13 during actual work; Figure 1 and Figure 2 As shown, the air duct bracket includes a first air duct bracket 14 and a second air duct bracket 15. The staff needs to install these air duct brackets on the facade. The installation position of the air duct bracket needs to be aligned with the installation position of the multi-section air duct, which is extremely inconvenient in actual operation. For this reason, we need to propose a device for vertical transportation and lifting of air ducts in narrow shafts. Summary of the invention

[0005] The purpose of the present invention is to provide a technical solution, setting up an air duct climbing frame with an automatic reset mechanism, which can be vertically lifted and supported on the air duct bracket to serve as an operating surface for staff, so as to solve the problems in the prior art raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for vertical transportation and hoisting of air ducts in a narrow shaft, comprising an air duct climbing frame that moves vertically in the shaft, the air duct climbing frame comprising a climbing frame body and a supporting frame, the supporting frame being installed at the bottom of the climbing frame body, the climbing frame body being provided with a clearance hole for the air duct to pass through, an air duct bracket being installed on the outer facade of the wall of the narrow shaft, the supporting frame being provided with an automatic reset mechanism, the automatic reset mechanism being used to detachably support the supporting frame on the air duct bracket;

[0008] The automatic reset mechanism includes a rotating rod, which is rotatably installed on the support frame through a rotating shaft. A support buckle is provided at the bottom of the rotating rod, and the support buckle is supported on the air duct bracket. A limiting hook is connected to the side of the bottom of the rotating rod, and the limiting hook is hooked on the side of the rotating rod; a reset rod is provided at the top of the rotating rod, and a limiting column is connected to the air duct bracket, and the reset rod rests on the limiting column.

[0009] Preferably, the support frame includes two groups of brackets, the two groups of brackets are respectively located on both sides of the air duct, and the automatic reset mechanism is installed on both sides of the brackets.

[0010] Preferably, the support frame is fixedly installed at the bottom of the climbing frame body, and a reinforcing bracket is arranged between the support frame and the climbing frame body.

[0011] Preferably, the two groups of brackets of the support frame are slidably installed at the bottom of the climbing frame body, and the spacing between the two groups of brackets can be adjusted. At the same time, the width of the climbing frame body is also adjusted simultaneously with the spacing between the two groups of brackets to achieve the overall width adjustment of the duct climbing frame. When the duct climbing frame needs to be lifted and moved in a narrow shaft, the overall width of the duct climbing frame can be contracted to avoid obstruction.

[0012] Preferably, the climbing frame body is configured as a telescopically adjustable base plate, a bidirectional screw is rotatably installed at the bottom of the climbing frame body, two groups of brackets are slidably installed at the bottom of the climbing frame body through sliders, and the two groups of brackets are also respectively installed with internal threaded cylinders that cooperate with the bidirectional screw threads, and a driver for rotationally driving the bidirectional screw is installed on the climbing frame body.

[0013] Preferably, a roller is installed on the side of the support frame close to the outer facade, and the roller is close to the outer facade of the shaft. When the climbing frame body is lifted, the roller rolls on the outer facade.

[0014] Preferably, a connecting plate is installed on the air duct bracket by fixing bolts, and multiple groups of sliding hangers are installed on the air duct bracket and the connecting plate. A first hanger is installed at the bottom of the multiple groups of sliding hangers, and a hanging rope of the first hanger is hung on the air duct climbing frame.

[0015] Preferably, the air duct support includes a first air duct support and a second air duct support, the shaft in which the air duct is installed includes multiple groups of first platforms and second platforms, the first air duct support is installed on the second platform, and the second air duct support is installed on the outer facade of the shaft.

[0016] Preferably, it comprises a second hoist installed on the top floor of the building and a plurality of fixed pulleys, wherein the hoisting rope of the second hoist is wound around the plurality of fixed pulleys and then hoisted on the air duct climbing frame to realize the lifting operation of the air duct.

[0017] Preferably, the method comprises the following steps:

[0018] S1. Installation of first floor air duct bracket;

[0019] S2. Installation of air duct climbing frame;

[0020] S3. Air duct installation;

[0021] S4. Installation of upper air duct bracket;

[0022] S5, the duct climbing frame is lifted, and S3 to S5 are repeated;

[0023] S6. Installation of top-floor air ducts;

[0024] S7. Remove the air duct climbing frame.

[0025] Technical effects and advantages of the present invention: Compared with the prior art, the present invention provides a device for vertical transportation and hoisting of air ducts in narrow shafts, which has the following advantages:

[0026] 1. The present invention ensures that the staff can use the duct climbing frame as an operating surface during the duct installation process through the structural design of the duct climbing frame, the design of the support frame and the automatic reset mechanism structure, and the safety of the staff's operation; at the same time, after the duct support is installed, the automatic reset mechanism allows the duct climbing frame to be erected on the duct support as an operating surface for the staff;

[0027] 2. The gravity reset rotation mode of the automatic reset mechanism also ensures the safety of the installation. The rotating rod is installed on the rotating rod through the bolt shaft. The setting of the limiting structures such as the reset rod, the support buckle and the limit hook on the rotating rod makes the rotating rod only able to rotate in one direction. The automatic reset mechanism supported on the duct bracket can obtain the supporting force of the rotating rod and the limiting force of multiple limiting structures. The support is stable and it is also convenient to dismantle the duct climbing frame every time it is lifted;

[0028] 3. The distance between the two groups of brackets slidably installed at the bottom of the climbing frame body can be adjusted, and the width of the climbing frame body is also adjusted simultaneously with the distance between the two groups of brackets to achieve the overall width adjustment of the duct climbing frame. When the duct climbing frame needs to be lifted and moved in a narrow shaft, the overall width of the duct climbing frame can be contracted to avoid obstruction; when the duct climbing frame is gradually lifted, the rollers roll along the outer facade of the shaft, ensuring the lifting stability while avoiding collisions between the climbing frame and the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a narrow building shaft in the prior art;

[0030] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 3 It is a schematic diagram of the setting method of the corridor refuge layer in the prior art;

[0032] Figure 4 It is a structural schematic diagram of the equipment for vertical transportation and hoisting of air ducts of the present invention;

[0033] Figure 5 For the present invention Figure 4 Schematic diagram of part of the plan structure;

[0034] Figure 6 For the present invention Figure 4 Schematic diagram of the three-dimensional plane structure;

[0035] Figure 7 This is one of the structural schematic diagrams of the air duct climbing frame in the present invention;

[0036] Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure at B in the middle;

[0037] Fig. 9 This is the second structural schematic diagram of the air duct climbing frame in the present invention;

[0038] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at C in the middle;

[0039] Fig.11 It is a schematic diagram of the planar structure of the air duct climbing frame of the present invention;

[0040] Fig.12 This is a flow chart of the operating steps of the equipment for vertical transportation and hoisting of air ducts of the present invention.

[0041] In the figure:

[0042] 11. First platform; 12. Second platform; 13. Air duct; 14. First air duct bracket; 15. Second air duct bracket;

[0043] 21. Climbing frame body; 22. Support frame; 23. Automatic reset mechanism; 24. Strengthening bracket; 25. First lifting device; 26. Second lifting device; 27. Fixed pulley; 28. Roller; 29. ​​Sliding hanger; 210. Connecting plate; 211. Pad; 212. Fixing bolt; 213. Fence; 214. Internal threaded barrel; 215. Bidirectional screw rod; 216. Sliding block; 217. Support; 218. Driver;

[0044] 231, rotating rod; 232, rotating shaft; 233, resetting rod; 234, limiting column; 235, supporting buckle; 236, limiting hook. DETAILED DESCRIPTION

[0045] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0046] The invention provides Figures 1 to 3 As shown, a device for vertical transportation and hoisting of air ducts in narrow shafts includes an air duct climbing frame that moves vertically in the shaft, the air duct climbing frame includes a climbing frame body 21 and a support frame 22, the support frame 22 is installed at the bottom of the climbing frame body 21, the climbing frame body 21 is provided with a clearance hole for the air duct to pass through, an air duct bracket is installed on the outer wall of the narrow shaft, and the support frame 22 is provided with an automatic reset mechanism 23, and the automatic reset mechanism 23 is used to detachably support the support frame 22 on the air duct bracket;

[0047] The automatic reset mechanism 23 includes a rotating rod 231, which is rotatably installed on the support frame 22 through a rotating shaft 232. A support buckle 235 is provided at the bottom of the rotating rod 231, and the support buckle 235 is supported on the air duct bracket. The bottom side of the rotating rod 231 is connected to a limiting hook 236, and the limiting hook 236 is hooked on the side of the rotating rod 231; a reset rod 233 is provided at the top of the rotating rod 231, and a limiting column 234 is connected to the air duct bracket, and the reset rod 233 rests on the limiting column 234.

[0048] like Figures 1 to 3 As shown, the construction is divided into four construction sections with the 9th, 25th and 41st refuge floors as boundaries, and the air duct hoisting and assembly are carried out on the refuge floor and roof floor respectively.

[0049] Working principle: The core of the equipment is an air duct climbing frame, including a climbing frame body 21 and a support frame 22, wherein the support frame 22 is installed at the bottom of the climbing frame body 21, and the climbing frame body 21 is provided with a hole for the air duct 13 to allow the air duct 13 to pass through; an automatic reset mechanism 23, the support frame 22 is equipped with an automatic reset mechanism 23, which can detachably support the support frame 22 on the air duct 13 bracket to achieve stable positioning of the air duct climbing frame; a rotating rod 231 and a limiting structure, the rotating rod 231 in the automatic reset mechanism 23 is rotatably installed on the support frame 22 through a rotating shaft 232, a support buckle 235 is provided at the bottom to support the air duct 13 bracket, a side limiting hook is hung on the rotating rod 231, and a reset rod 233 is provided at the top to rest on the limiting column 234 of the air duct 13 bracket to ensure the stability of the support frame 22; construction section division , the construction area is divided into multiple sections with the refuge floor as the boundary, and the hoisting and assembly of the air duct 13 are carried out on the refuge floor and the roof layer, thereby improving construction efficiency and safety; improving construction safety, through the design of the air duct climbing frame and the automatic reset mechanism 23, the staff can safely carry out the hoisting and assembly work of the air duct 13 on the climbing frame; enhancing stability, the limiting structure of the automatic reset mechanism 23 ensures the stability of the air duct climbing frame on the air duct 13 bracket, reducing the potential safety hazards during the construction process; improving construction efficiency, the design of the air duct climbing frame allows the air duct 13 to be hoisted and assembled on the refuge floor and the roof layer, reducing the risk of high-altitude operations and improving construction efficiency; flexibly adapting to different construction environments, through the division of construction sections, the equipment can adapt to narrow shafts of different heights and structures, increasing the applicability of the equipment;

[0050] like Figure 7 and Fig. 9 As shown, the support frame 22 includes two groups of brackets, and the two groups of brackets are respectively located on both sides of the air duct 13, and the automatic reset mechanism 23 is installed on both sides of the bracket.

[0051] like Figure 7 and Fig. 9 As shown, the support frame 22 is fixedly installed at the bottom of the climbing frame body 21, and a reinforcing bracket 24 is provided between the support frame 22 and the climbing frame body 21. A pad 211 is provided on the climbing frame body 21, and a fence 213 is also provided on the climbing frame body 21. When the air duct passes through the clearance hole of the climbing frame body 21, the staff stands between the gap between the well and the air duct to operate.

[0052] like Fig.11As shown, the two groups of brackets of the support frame 22 are slidably installed at the bottom of the climbing frame body 21, and the spacing between the two groups of brackets can be adjusted. At the same time, the width of the climbing frame body 21 is also adjusted simultaneously with the spacing between the two groups of brackets, so as to achieve the overall width adjustment of the air duct climbing frame. When the air duct climbing frame needs to be lifted and moved in a narrow shaft, the overall width of the air duct climbing frame can be contracted to avoid obstruction. The climbing frame body 21 is configured as a telescopic and adjustable bottom plate. A two-way screw rod 215 is rotatably installed at the bottom of the climbing frame body 21 through a support 217. The two groups of brackets are slidably installed at the bottom of the climbing frame body 21 through a slider 216. The two groups of brackets are also respectively installed with internal threaded cylinders 214 that are threadedly matched with the two-way screw rod 215. A driver 218 for rotationally driving the two-way screw rod 215 is installed on the climbing frame body 21. Specifically, as Fig.11 As shown, the driver 218 drives the bidirectional lead screw 215 through a worm gear structure, and the safety of adjusting the bidirectional lead screw 215 is ensured by the self-locking of the worm gear structure.

[0053] like Fig. 9 and Fig.10 As shown, a roller 28 is installed on the side of the support frame 22 close to the outer facade, and the roller 28 is close to the outer facade of the hoistway. When the climbing frame body 21 is lifted, the roller 28 rolls on the outer facade.

[0054] like Figure 7 and Figure 8 As shown, the duct support is mounted with a connecting plate 210 via fixing bolts 212, and multiple sets of sliding hangers 29 are mounted on the duct support and the connecting plate 210. A first hanger 25 is mounted at the bottom of the multiple sets of sliding hangers 29, and the hanging rope of the first hanger 25 is hung on the duct climbing frame. Figure 8 As shown, the sliding hanger 29 is a sliding sleeve structure. During actual installation, the sliding hanger 29 is first sleeved and installed on the air duct bracket and the connecting plate 210, and then the connecting plate 210 is installed on the air duct bracket through the fixing bolts 212. This ensures that the sliding hanger 29 will not fall out after being sleeved, thereby ensuring the safety of the air duct climbing frame hoisting.

[0055] It is important to note that the worker's safety rope cannot share the same lifting position with the duct climbing frame.

[0056] like Figure 1 and Figure 2 As shown, the air duct support includes a first air duct support 14 and a second air duct support 15, and the shaft in which the air duct is installed includes multiple groups of first platforms 11 and second platforms 12. The first air duct support 14 is installed on the second platform 12, and the second air duct support 15 is installed on the outer facade of the shaft.

[0057] like Figure 4As shown, it includes a second hoist 26 and multiple sets of fixed pulleys 27 installed on the top floor of the building. The hoisting rope of the second hoist 26 is wound around the multiple sets of fixed pulleys 27 and then hoisted on the air duct climbing frame to realize the lifting operation of the air duct.

[0058] like Fig.12 As shown, the following operating steps are included: S1, installation of the first-floor air duct bracket; S2, installation of the air duct climbing frame; S3, installation of the air duct; S4, installation of the upper-floor air duct bracket; S5, lifting of the air duct climbing frame, and repeating S3 to S5; S6, installation of the top-floor air duct; S7, removal of the air duct climbing frame.

[0059] In summary, the present invention also has the following comprehensive effects: the duct climbing frame moves vertically, and the device realizes the vertical transportation and hoisting of the duct 13 through the duct climbing frame that moves vertically in the hoistway. The duct climbing frame includes a climbing frame body 21 and a support frame 22, the support frame 22 is installed at the bottom of the climbing frame body 21, and the climbing frame body 21 is provided with a clearance hole for the duct 13 to pass through; an automatic reset mechanism 23, the support frame 22 is provided with an automatic reset mechanism 23, and the mechanism is used to detachably support the support frame 22 on the duct 13 bracket. The automatic reset mechanism 23 includes a rotating rod 231, which is rotatably installed on the support frame 22 through a rotating shaft 232. A support buckle 235 is provided at the bottom, and a reset rod 233 is provided at the top. Stable support is achieved through a limit hook and a limit column 234; width adjustment function, the two groups of brackets of the support frame 22 are slidably installed at the bottom of the climbing frame body 21, and the spacing between the two groups of brackets is adjustable. At the same time, the width of the climbing frame body 21 is also adjusted according to the spacing between the two groups of brackets to adapt to air ducts 13 of different widths; roller 28 assists in movement, and a roller 28 is installed on the side of the support frame 22 close to the facade. The roller 28 is close to the facade of the well. When the climbing frame body 21 is lifted, the roller 28 rolls on the facade, ensuring the lifting stability while avoiding collision between the climbing frame and the wall.

[0060] The hoisting system includes a connecting plate 210 installed on the bracket of the air duct 13 through a fixing bolt 212, and a plurality of sliding hangers 29 are installed on the connecting plate 210. A first hoist 25 is installed at the bottom, and a hoisting rope of the first hoist 25 is hoisted on the air duct climbing frame to realize the lifting operation of the air duct 13. The operational safety is improved. Through the structural design of the air duct climbing frame, the design of the support frame 22 and the automatic reset mechanism 23 ensures that the staff can use the air duct climbing frame as the operating surface during the installation process of the air duct 13, thereby improving the safety of the staff's operation. The installation efficiency is improved, and the gravity reset rotation mode of the automatic reset mechanism 23 ensures that the air duct 13 can be lifted and lowered. The safety of the installation is ensured, and the duct climbing frame is convenient to be disassembled each time it is lifted, thereby improving the installation efficiency; the adaptability is strong, and the spacing between the two sets of brackets slidably installed at the bottom of the climbing frame body 21 is adjustable, and the width of the climbing frame body 21 is also adjusted along with the spacing between the two sets of brackets to adapt to ducts 13 of different sizes, thereby improving the adaptability of the equipment; the obstruction and collision are reduced, and when the duct climbing frame needs to be lifted and moved in a narrow shaft, the overall width of the duct climbing frame can be contracted to avoid obstruction; the roller 28 rolls along the outer facade of the shaft, ensuring the lifting stability while avoiding the collision between the climbing frame and the wall;

[0061] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A device for vertical transportation and hoisting of air ducts in narrow shafts, characterized in that: The invention relates to a duct climbing frame capable of vertically moving in a shaft, wherein the duct climbing frame comprises a climbing frame body (21) and a support frame (22), wherein the support frame (22) is mounted at the bottom of the climbing frame body (21), wherein the climbing frame body (21) is provided with a clearance hole for the duct to pass through, and an duct support is mounted on the outer wall of the narrow shaft, wherein the support frame (22) is provided with an automatic reset mechanism (23), wherein the automatic reset mechanism (23) is used to detachably support the support frame (22) on the duct support; The automatic reset mechanism (23) comprises a rotating rod (231), the rotating rod (231) is rotatably mounted on the support frame (22) via a rotating shaft (232), a support buckle (235) is arranged at the bottom of the rotating rod (231), the support buckle (235) is supported on the air duct bracket, a limit hook (236) is connected to the side surface of the bottom of the rotating rod (231), and the limit hook (236) is hooked on the side surface of the rotating rod (231); a reset rod (233) is arranged at the top of the rotating rod (231), a limit column (234) is connected to the air duct bracket, and the reset rod (233) rests on the limit column (234).

2. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 1 is characterized in that: The support frame (22) includes two groups of brackets, which are respectively located on both sides of the air duct (13), and the automatic reset mechanism (23) is installed on both sides of the brackets.

3. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 2 is characterized in that: The support frame (22) is fixedly mounted on the bottom of the climbing frame body (21), and a reinforcing bracket (24) is provided between the support frame (22) and the climbing frame body (21).

4. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 2 is characterized in that: The two groups of brackets of the support frame (22) are slidably mounted on the bottom of the climbing frame body (21), and the spacing between the two groups of brackets can be adjusted. At the same time, the width of the climbing frame body (21) is also adjusted simultaneously with the spacing between the two groups of brackets, so as to achieve the overall width adjustment of the air duct climbing frame. When the air duct climbing frame needs to be lifted and moved in a narrow shaft, the overall width of the air duct climbing frame can be contracted to avoid obstruction.

5. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 4 is characterized in that: The climbing frame body (21) is configured as a telescopically adjustable bottom plate, a bidirectional screw rod (215) is rotatably mounted at the bottom of the climbing frame body (21), two groups of brackets are slidably mounted at the bottom of the climbing frame body (21) via a slider (216), and the two groups of brackets are respectively mounted with internal threaded cylinders (214) threadably matched with the bidirectional screw rod (215), and a driver (218) for rotationally driving the bidirectional screw rod (215) is mounted on the climbing frame body (21).

6. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 1 is characterized in that: A roller (28) is installed on one side of the support frame (22) close to the outer facade, and the roller (28) is close to the outer facade of the shaft. When the climbing frame body (21) is lifted, the roller (28) rolls on the outer facade.

7. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 1 is characterized in that: A connecting plate (210) is installed on the air duct bracket via fixing bolts (212); a plurality of sets of sliding hangers (29) are installed on the air duct bracket and the connecting plate (210); a first hanger (25) is installed at the bottom of the plurality of sets of sliding hangers (29); and a hanging rope of the first hanger (25) is hung on the air duct climbing frame.

8. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 7, characterized in that: The air duct support comprises a first air duct support (14) and a second air duct support (15); the shaft in which the air duct is installed comprises a plurality of first platforms (11) and second platforms (12); the first air duct support (14) is installed on the second platform (12); and the second air duct support (15) is installed on the outer facade of the shaft.

9. The device for vertical transportation and hoisting of air ducts in narrow shafts according to any one of claims 1 to 8, characterized in that: It comprises a second hoist (26) installed on the top floor of the building and a plurality of fixed pulleys (27). The hoisting rope of the second hoist (26) is wound around the plurality of fixed pulleys (27) and then hoisted on the air duct climbing frame to realize the lifting operation of the air duct.

10. The device for vertical transportation and hoisting of air ducts in narrow shafts according to claim 9, characterized in that: The steps are as follows: S1. Installation of first floor air duct bracket; S2, installation of air duct climbing frame; S3. Air duct installation; S4. Installation of upper air duct bracket; S5, the duct climbing frame is lifted, and S3 to S5 are repeated; S6. Installation of top-floor air ducts; S7. Remove the air duct climbing frame.

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