A duct construction method

Abstract

The application provides a duct construction method, and relates to the technical field of building, and at least comprises a first installation method: making a construction scheme, arranging a construction site; erecting a first working platform to facilitate construction on a travelling crane; using the first working platform, erecting a second working platform on a part of the travelling crane that can move horizontally, and erecting a third working platform on the second working platform, and then removing the first working platform; using the travelling crane and the second working platform and the third working platform, installing a duct on a corresponding part of a building; erecting the first working platform again to remove the third working platform and the second working platform, and then removing the first working platform again. The duct construction method uses the existing travelling crane in the workshop for hoisting operation, not only solves the installation demand of the duct in a high and large space with a complex top surface structure, but also realizes obstacle avoidance operation construction in a complex ground environment, and improves construction efficiency, engineering construction quality and construction safety.

Description

Technical Field

[0001] This invention relates to the field of building technology, and more specifically to a method for constructing air ducts. Background Technology

[0002] With the development of building technology and the continuous improvement of ventilation engineering construction techniques, the fabrication and installation of ventilation systems have high requirements. However, problems often arise during construction that affect the quality of work. Common installation methods for supply and exhaust air systems and air conditioning systems require completion of construction at relevant structural locations within the building, and obstructions at the installation site must be cleared to facilitate construction. The emergence of new building structures presents challenges for the installation of ventilation ducts in high-ceilinged spaces due to the unique construction conditions. The installation of ventilation ducts is related to water, electricity, gas, civil engineering, and decoration works. As a complex system engineering project, the duct construction process is relatively intricate, especially in high-ceilinged spaces, where it is crucial to ensure both smooth duct hoisting and construction safety throughout the entire process. Therefore, to successfully install ducts in high-ceilinged spaces, it is necessary to develop scientific and reasonable construction methods tailored to the specific construction environment.

[0003] For the installation of ductwork in tall spaces, Chinese patent application CN201910729607.6 discloses an assembly device and construction method for ultra-large ductwork in tall spaces. The device includes a hoisting bracket and an assembly platform. The hoisting bracket includes a horizontal beam and two bottom beams. The two ends of the horizontal beam are connected to the two ends of the two bottom beams through longitudinal beams. A reinforcing beam is provided between the two bottom beams. A lifting device is provided on the horizontal beam for hoisting the ductwork. The two ends of the bottom beams are provided with wheels. The side projections of the longitudinal beam, bottom beam, and reinforcing beam form a triangle. The assembly platform is a standard section of a box-type frame structure, on which the ductwork is placed. The hoisting bracket, in conjunction with the lifting device, allows multiple standard sections to be selected and assembled according to the length of the assembled ductwork before placing the ductwork. The hoisting bracket can also perform the function of transporting ductwork, enabling the hoisting and installation of multiple ductwork sections at once. However, during the actual construction process, the applicant found that while the solution could achieve its intended installation effect in unobstructed, high-ceilinged spaces, it was difficult to place the standard sections on the building floor for spaces with complex structures, such as spaces with sloping ceilings or overhead cranes, and ground-level structures with various equipment or load-bearing components. Furthermore, due to the presence of equipment or functional structural components of the building floors, such as openings between floors, the hoisting supports used to move the ductwork also made it difficult to transport the ductwork and connect and transfer it with the standard sections. Therefore, the solution has certain defects.

[0004] In summary, for complex buildings with large spaces, especially factory-type buildings with overhead cranes at the top and production equipment at the bottom, a suitable installation method needs to be developed for ductwork installation to solve the construction challenges posed by the building's top and bottom structures and existing equipment layout. Summary of the Invention

[0005] To address the challenges of installing ductwork in tall, open spaces with overhead cranes and production equipment at the bottom, resulting in low on-site efficiency and safety concerns, this application provides a ductwork installation method. By utilizing existing overhead cranes within the workshop for hoisting operations, this method not only solves the installation requirements for ductwork in tall, open spaces with complex ceiling structures but also enables obstacle avoidance operations in complex ground environments, thereby improving construction efficiency, project quality, and safety.

[0006] The technical solution adopted by this application to solve its technical problem is: a duct construction method, characterized in that it includes at least a first installation method, the first installation method including the following steps:

[0007] S1. Develop a construction plan and arrange the construction site;

[0008] S2. Erect the first working platform to facilitate construction on the overhead crane;

[0009] S3. Using the first working platform, a second working platform is erected on the component where the crane can move horizontally, and a third working platform is erected on the second working platform. Then the first working platform is dismantled.

[0010] S4. Install ductwork in the corresponding parts of the building by using a crane and the second and third working platforms;

[0011] S5. Re-erect the first working platform to dismantle the third and second working platforms, and then dismantle the first working platform again.

[0012] In one specific implementation, in step S4, before installing the duct, hanging rings are set at the corresponding parts of the building and ropes are threaded through them to facilitate the suspension of the duct during installation.

[0013] In one specific implementation, in step S4, a work protection zone is provided below the second work platform, which moves with the position of the second work platform, for material transfer and construction warning.

[0014] In one specific implementation, the duct construction method further includes a second installation method, which involves setting up a movable fourth working platform on the ground at the construction site to install the duct at the corresponding location in the building.

[0015] In one specific implementation, the duct construction method further includes a third installation method, which involves erecting a fifth working platform with diagonal bracing on the ground at the construction site to install the duct at the corresponding location in the building.

[0016] In one specific implementation, in step S4, during duct installation, a positioning device for connecting the duct to the building is provided. The positioning device is implemented in the following ways:

[0017] The hanger includes hangers installed on both sides of the duct wall and connected to the building at the top, and a bottom rod connected to the bottom of the hangers on both sides of the duct wall to accommodate and support the duct.

[0018] The bracket includes a support connected to the building and an auxiliary support that is loaded on the support and arranged along the duct laying direction to support the duct. The duct is provided with a circumferentially fitted outer contour and connected to the auxiliary support along its duct wall.

[0019] A suspension system is connected to the vertical structure of the building and forms an enclosing space that conforms to the outer contour of the duct, thereby limiting and fixing the vertically installed duct.

[0020] In one specific implementation, the hanger further includes a top rod opposite to the bottom rod and disposed on the other side of the duct, and the bottom rod and the top rod are respectively provided with connectors at both ends to achieve circumferential fixation of the duct.

[0021] In one specific implementation scheme, the second and third working platforms are each equipped with lifting equipment to facilitate hoisting during construction.

[0022] In one specific implementation, the third working platform is provided with a vertical logistics channel for hoisting equipment.

[0023] In one specific implementation plan, when there are openings in the ground at the construction site, the openings are protected to improve construction safety.

[0024] The advantages of the embodiments of this application are:

[0025] 1. The duct construction method involves building a working platform on the existing components of the building structure that can be moved by a crane and setting up lifting equipment to store and install the ducts. This method enables obstacle avoidance operations in complex ground environments and minimizes the impact on existing equipment or building structures during the installation process.

[0026] 2. The duct construction method involves setting up a working platform on the working platform built on the component that is moved by the crane, thereby further adapting to different building roof structures. The working platform can be set up to match different sloping roof structures, making the laying of ducts more convenient and flexible.

[0027] 3. Ductwork construction methods: For horizontal ducts located under the overhead crane and vertical ducts, appropriate working platforms are erected to enable different installation methods for ducts in different locations within the same tall space, providing greater construction flexibility.

[0028] 4. The duct installation method involves setting up corresponding work platforms on the components that allow the traveling crane to move horizontally, based on the location of the duct installation. By moving the traveling crane, the ducts in different locations can be installed in separate areas, avoiding the drawbacks of traditional installation methods that require setting up hoisting facilities for different duct installation locations multiple times, thereby improving work efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the first installation method of a duct construction method according to the present invention;

[0030] Figure 2 This is a schematic diagram of a construction site cross-section of a duct construction method according to the present invention;

[0031] Figure 3 This is a top view schematic diagram of the air supply system of a duct construction method according to the present invention;

[0032] Figure 4 This is a top view schematic diagram of the exhaust system of a duct construction method according to the present invention;

[0033] Figure 5 This is a schematic diagram of the first working platform of a duct construction method according to the present invention;

[0034] Figure 6 This is a schematic diagram of the second and third working platforms of a duct construction method according to the present invention;

[0035] Figure 7 This is a schematic diagram of the lifting ring arrangement in a duct construction method according to the present invention;

[0036] Figure 8 This is a schematic diagram of the rope arrangement in a duct construction method according to the present invention;

[0037] Figure 9 This is a schematic diagram of the fourth working platform in a duct construction method according to the present invention;

[0038] Figure 10 This is a schematic diagram of the fifth working platform of a duct construction method according to the present invention.

[0039] Explanation of key figure labels:

[0040] 1-Exhaust system; 2-Air supply system; 3-Tractor; 4-Crossbeam; 5-First working platform; 6-Second working platform; 7-Third working platform; 8-Cycling machine; 9-Electric hoist; 10-Logistics channel; 11-Lifting ring; 12-Rope; 13-Fourth working platform; 14-Fifth working platform. Detailed Implementation

[0041] This application provides a duct construction method to solve the problems of high difficulty in duct installation, low on-site work efficiency, and difficulty in ensuring construction safety in existing construction methods for building structures with tall spaces, overhead cranes, and production equipment at the bottom. The overall approach is as follows:

[0042] Please see Figure 1 This invention provides a duct construction method for installing ducts in buildings equipped with a crane 3. The method includes at least a first installation method, comprising the following steps: S1, developing a construction plan and setting up the construction site; S2, erecting a first working platform 5 to facilitate construction on the crane 3; S3, using the first working platform 5, erecting a second working platform 6 on the components of the crane 3 that allow for translation, and erecting a third working platform 7 on the second working platform 6, then dismantling the first working platform 5; S4, installing ducts in corresponding parts of the building using the crane 3, the second working platform 6, and the third working platform 7; S5, re-erecting the first working platform 5 to dismantle the third working platform 7 and the second working platform 6, and then dismantling the first working platform 5 again. By constructing the first working platform 5 and further constructing the second working platform 6 and the third working platform 7 on the existing components of the crane 3 that allow for translation, ducts can be stored, transported, and installed. This allows for obstacle avoidance operations in complex ground environments, minimizing impact on existing equipment or building structures during installation.

[0043] In this embodiment, please refer to Figures 2-4 The building's roof is a sloping structure, requiring the installation of three horizontal exhaust system ducts (1) at different heights on the roof, and two horizontal supply system ducts (2) at different heights on the vertical structure. Vertical ductwork also needs to be installed at corresponding locations, making the construction plan complex. Furthermore, the work area contains not only machinery and equipment, but also openings in the ground that connect to the next floor. Therefore, these openings need to be protected to improve construction safety. Specifically, multiple channel steel strips are laid over the openings, and wooden planks are laid on top for protection. The protection is removed after the ductwork installation in the corresponding area is completed.

[0044] The building in this example is a factory structure; please refer to [link / reference]. Figure 2 The overhead crane 3 is a bridge-type structure. Tracks are installed on both sides of the overhead crane 3 along the length of the factory building. The components enabling translation of the overhead crane 3 include at least two crossbeams 4. The two ends of the crossbeams 4 span the tracks on both sides and can move along the tracks to achieve cross-area transport within the factory building. Please refer to [link / reference]. Figure 5 The first working platform 5 can be scaffolding, which is erected on the ground below the crane 3 during construction. In this example, the three ventilation systems 1 are respectively equipped with the first working platform 5, with guardrails around the perimeter and wooden planks covering the top, providing an operating and material transfer area for the second working platform 6 to be erected on the crossbeam 4 of the crane 3.

[0045] After completing the setup of the first working platform 5, please refer to Figures 5-6 A second working platform 6 is constructed using channel steel and wooden planks on the two crossbeams 4 at the top of the overhead crane 3, with guardrails around it. Similarly, a second working platform 6 is constructed corresponding to the positions of the three exhaust systems 1 in this example. A duct hoisting area can be set up on the second working platform 6, equipped with lifting equipment such as a small crane 8 to hoist ducts and related construction materials to the second working platform 6 for temporary storage. A third working platform 7 is constructed on each second working platform 6. The third working platform 7 can be a scaffolding-style elevated platform used to install ducts and related components. The third working platform 7 is also equipped with lifting equipment such as an electric hoist 9 in this example for hoisting during construction. A logistics channel 10 is also provided vertically along the third working platform 7 for hoisting equipment. After the construction of the second working platforms 6 and the third working platforms 7 is completed, the first working platform 5 is dismantled. By driving the crane 3 to move horizontally, and in conjunction with the second working platform 6 and the third working platform 7, the air ducts are installed in the corresponding parts of the building; after the air ducts are installed in the corresponding positions, the first working platform 5 is erected again to dismantle the third working platform 7 and the second working platform 6, and then the first working platform 5 is dismantled again.

[0046] Considering construction safety, when implementing the first installation method, a work protection zone is set up in the corresponding area below each second work platform 6, with warning tapes and dedicated personnel for guarding it. Within the work protection zone, installation personnel are responsible for transferring materials, and other personnel are strictly prohibited from entering the warning zone. This work protection zone moves with the second work platform 6.

[0047] When implementing the first installation method, please refer to Figures 7-8 In step S4, before installing the ductwork, lifting rings 11 are installed at the corresponding locations on the building, and ropes 12, such as steel wire ropes, are threaded through them to facilitate suspending the ductwork during installation. The lifting rings 11 can be installed at the top of the building, and the ropes 12 are installed along the laying direction of the ductwork.

[0048] It should be noted that the design and installation locations of ducts in actual projects are diverse. Therefore, in addition to the first installation method, the duct construction methods in this example also include a second and a third installation method. Please refer to [link / reference needed]. Figure 9 The second installation method involves erecting a movable fourth working platform 13 on the ground at the construction site to install the air ducts at the corresponding locations on the building. The fourth working platform 13 can be scaffolding with wooden planks and guardrails, equipped with heavy-duty wheels with brakes to facilitate the movement and installation of the horizontally positioned air supply system 2 air ducts. The third installation method involves erecting a fifth working platform 14 with diagonal bracing on the ground at the construction site to install the air ducts at the corresponding locations on the building. The fifth working platform 14 can also be scaffolding with wooden planks and guardrails, with diagonal bracing on the outer side to improve stability. The fifth working platform 14 can be used for the installation of vertical air ducts. Please refer to [link / reference]. Figure 10 In this example, a fifth working platform 14 is set up on different floors of the building to install vertical air ducts at corresponding locations.

[0049] In this embodiment, a corresponding positioning device connected to the building is designed for the installation of the air duct. There are various ways to implement the positioning device, such as the hanger, bracket, suspension and other structures in this example.

[0050] When using a hanger system, the hanger system includes hangers installed on both sides of the duct wall and connected to the building at the top, as well as a base rod that connects the bottom of the hangers on both sides of the duct wall to accommodate and support the duct. This method can be used for the installation of exhaust systems 1 and small-sized ducts. Specifically, the hangers can be commonly used threaded hangers, and the base rod can be made of angle steel.

[0051] When using a bracket system, the bracket includes a support connected to the building and an auxiliary support that is loaded on the support and installed along the duct laying direction to support the duct. The duct has a circumferentially fitted outer contour and connected to the auxiliary support along its circumferential wall. This method can be used for the installation of air intake system ducts. Specifically, the support can be made of channel steel in a triangular structure, the auxiliary support can also be made of channel steel of the corresponding specifications, and the circumferential support can be made of angle steel or threaded rod.

[0052] It should be noted that hangers and brackets can be used in combination. For example, in places where there is no suspension position on the top of the building, brackets can be installed on the vertical structure of the building, and then hangers can be connected below the auxiliary components of the brackets to realize the installation and support of the air ducts.

[0053] When using a suspension system, the suspension is connected to the vertical structure of the building and forms an enclosed space that matches the outer contour of the duct, thereby limiting and fixing the vertically installed duct. This method can be used for the installation of vertical ducts. Specifically, the suspension can use angle steel to create triangular cantilever brackets on both sides of the vertical duct that are connected to the building, and the triangular cantilever brackets on both sides are connected by angle steel to form an enclosed space for the duct, thereby achieving limiting and fixing.

[0054] Furthermore, the hanger may also include a top rod opposite the bottom rod and located on the other side of the duct. Both ends of the bottom rod and the top rod are provided with connectors to achieve a circumferential fixation of the duct, further improving the stability of the duct installation.

[0055] In summary, this invention provides a duct construction method that utilizes existing overhead cranes in the workshop for hoisting operations. This not only solves the installation requirements of ducts in tall spaces with complex ceiling structures, but also enables obstacle avoidance operations in complex ground environments, thereby improving construction efficiency, project quality, and construction safety.

[0056] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for installing ventilation ducts in buildings equipped with overhead cranes, characterized in that, It includes at least a first installation method, which includes the steps of: S1. Develop a construction plan and arrange the construction site; S2. To meet the different height requirements of duct installation on the sloping structure of the building roof, a first working platform is set up to facilitate construction on the crane. S3. Using the first working platform, a second working platform is erected on the crossbeam where the crane can move horizontally. The second working platform is equipped with a duct hoisting area and a small crane. A third working platform is erected on each of the second working platforms. The third working platform is equipped with lifting equipment to facilitate hoisting during construction. At the same time, a logistics channel for hoisting equipment is set up vertically on the third working platform. Then the first working platform is dismantled. S4. By driving the crossbeam to move horizontally through the crane, and combining the transfer of air ducts by the crane on the second working platform and the hoisting of the lifting equipment on the third working platform, the horizontal and vertical air ducts at different heights on the top of the building are installed. S5. Re-erect the first working platform, and use the first working platform to dismantle the third working platform and the second working platform in sequence, and then dismantle the first working platform again. In step S4, before installing the ductwork, hanging rings are set at the corresponding parts of the building and ropes are threaded through them to facilitate the suspension of the ductwork during installation. In step S4, during duct installation, a positioning device is provided for the duct to connect with the building. The positioning device is implemented in the following ways: The hanger includes hangers installed on both sides of the duct wall and connected to the building at the top, and a bottom rod connected to the bottom of the hangers on both sides of the duct wall to accommodate and support the duct. The bracket includes a support connected to the building and an auxiliary support that is loaded on the support and arranged along the duct laying direction to support the duct. The duct is provided with a circumferentially fitted outer contour and connected to the auxiliary support along its duct wall. A suspension system is connected to the vertical structure of the building and forms an enclosing space that conforms to the outer contour of the duct, thereby limiting and fixing the vertically installed duct.

2. The duct construction method as described in claim 1, characterized in that, In step S4, a protective work area is set up below the second work platform, which moves with the position of the second work platform, for material transfer and construction warning.

3. The duct construction method as described in claim 1, characterized in that, The duct construction method also includes a second installation method, which involves setting up a movable fourth working platform on the ground at the construction site to install the duct at the corresponding location in the building.

4. The duct construction method as described in claim 1, characterized in that, The duct construction method also includes a third installation method, which involves setting up a fifth working platform with diagonal bracing on the ground at the construction site to install the duct at the corresponding location in the building.

5. A duct construction method as described in claim 1, characterized in that, The hanger also includes a top rod opposite the bottom rod and set on the other side of the duct. Both ends of the bottom rod and the top rod are respectively provided with connectors to achieve circumferential fixation of the duct.

6. The duct construction method as described in claim 1, characterized in that, When there are openings in the ground at the construction site, these openings should be protected to improve construction safety.

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