A large-span steel beam aerial assembly device

Abstract

This invention provides an aerial assembly device for large-span steel beams. The device includes a support mechanism and two positioning mechanisms. The support mechanism is positioned between the factory columns where the steel beams are to be installed. The positioning mechanisms are symmetrically positioned at the top of the support mechanism along the axis of the steel beams and include paired positioning components. These positioning components can move perpendicular to the axis of the steel beams to position and adjust their axial position. This invention provides a support platform and working platform for the assembly and connection of the steel beams by setting up the support mechanism, avoiding the need for large-scale temporary work platforms and significantly saving construction time and costs. The positioning mechanisms enable convenient, efficient, and precise positioning of the steel beams. The self-unloading lifting device allows for the dismantling of the support mechanism, avoiding prolonged occupation of hoisting equipment, resulting in high construction efficiency and safety.

Description

Technical Field

[0001] This utility model belongs to the field of building steel beam installation technology, and in particular relates to an aerial assembly device for large-span steel beams. Background Technology

[0002] During factory installation, large-span steel beams are often required due to the special requirements of the factory building or the spaces between its columns. For example, in the cooling bed area of ​​a heavy plate rolling mill, the column spacing reaches 48 meters due to the special production process, resulting in a steel beam length of approximately 48 meters between two columns. However, due to limitations in transportation routes and installation site space, the steel beams need to be manufactured in sections at the processing plant and then transported to the installation site for assembly and welding into a complete structure. Furthermore, due to ground conditions and site limitations within the factory, the steel beams cannot be assembled and welded on the ground; they must be hoisted into the air for assembly and welding, making the construction extremely difficult. The conventional method involves erecting temporary frames and platforms on the ground and using large cranes for assembly and welding. This method requires significant manpower and material costs, increasing construction costs, and also consumes a lot of time. Moreover, using large cranes for assembly and positioning is difficult, and the assembly accuracy is hard to control, resulting in excessive construction time. Prolonged high-altitude work is also detrimental to safety. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an aerial assembly device for large-span steel beams, which can conveniently, efficiently and accurately complete the aerial assembly and connection of large-span steel beams, significantly improving construction efficiency and reducing construction costs.

[0004] The technical solution adopted by this utility model is: an aerial assembly device for large-span steel beams, including a support mechanism and two positioning mechanisms. The support mechanism is set between the columns of the factory building where the steel beams are to be installed. The positioning mechanisms are symmetrically arranged at the top of the support mechanism along the axial direction of the steel beams and include a pair of positioning components. The positioning components can move along a direction perpendicular to the axial direction of the steel beams to position and adjust the axial position of the steel beams.

[0005] Furthermore, the support mechanism includes a ladder, a working platform, and a support beam. The bottom end of the support mechanism is fixed to the ground by anchor bolts. The ladder extends from bottom to top to the support beam. The working platform and the support beam are located at the top of the support mechanism, with the support beam positioned above the working platform. The positioning mechanism is located on the support beam.

[0006] Furthermore, the support mechanism includes several standard sections, free sections connected to the upper end of the standard sections, and a base section connected to the lower end of the standard sections; each of the standard sections, the free sections, and the base section includes a column, and adjacent columns are connected by positioning pins and locked by connecting lugs on the outer wall of the column.

[0007] Furthermore, the positioning mechanism also includes a positioning beam, which is disposed on the support beam in a direction perpendicular to the axis of the steel beam; the top surface of the positioning beam is a bearing surface, and the elevation of the bearing surface is the same as the design elevation of the bottom surface of the steel beam.

[0008] Furthermore, the positioning components are symmetrically arranged on the bearing surface, including a connecting plate and a limiting plate vertically arranged in the middle of the connecting plate. The connecting plate is provided with an elongated hole for bolt connection to the positioning beam. The two limiting plates are inclined outward on the side that is relatively close to each other and aligned with the center line of the positioning beam.

[0009] Furthermore, the positioning mechanism also includes a fine-tuning component, which is disposed on the opposite side of the positioning component and includes a first driving member and a first telescopic member. The first telescopic member can move closer to or further away from the positioning component under the action of the first driving member.

[0010] Furthermore, the positioning mechanism also includes a vertical positioning component, which is disposed at the middle of the positioning beam along its length and includes a second driving member and a second telescopic member. The second telescopic member can extend or retract from the bearing surface under the action of the second driving member.

[0011] Furthermore, it also includes a centering and fastening mechanism, which includes a clamping member and a connecting member. The clamping member is disposed at both ends of the connecting member and includes at least two positioning steel plates parallel to the connecting member. The spacing between the positioning steel plates is the same as the thickness of the upper flange plate of the steel beam.

[0012] Furthermore, it also includes a laser detection device for detecting the straightness of the steel beam and a lifting and unloading device for dismantling the support mechanism.

[0013] A method for aerial assembly and connection of large-span steel beams, employing the aerial assembly device for large-span steel beams as described above, includes the following steps:

[0014] Anchor bolts: Anchor bolts are pre-embedded during the construction of the factory foundation according to the installation location of the support mechanism;

[0015] Installation of base section and standard section: Assemble each of the standard sections, free sections and base sections on the ground, connect the base sections with the anchor bolts, and then install each of the standard sections in sequence from bottom to top;

[0016] Assemble the positioning mechanism: Assemble and connect the positioning beam, positioning component, fine-tuning component and vertical positioning component on the ground to form the positioning mechanism, and assemble and connect the positioning mechanism with the free joint;

[0017] Install the positioning mechanism: Install the free section and the positioning mechanism on the top of the standard section using hoisting equipment;

[0018] Adjust the position of the positioning component: so that the limiting plate of the positioning component is located on the center line of the positioning beam, and the distance between the two limiting plates matches the width of the lower flange plate of the steel beam;

[0019] The steel beam on one side is hoisted and positioned: The steel beam on one side is hoisted onto the factory building column and positioning mechanism on that side using the hoisting equipment. The centerline position of the steel beam on one side is adjusted by the positioning component and the fine adjustment component so that the centerline of the steel beam coincides with the designed centerline.

[0020] Hoisting and positioning the steel beam on the other side: Repeat the previous step to complete the hoisting and positioning of the steel beam on the other side;

[0021] To detect the straightness of the steel beams: a laser detection device is installed on the upper surface of the steel beams on both sides at the ends furthest from each other, and the straightness of the upper surface of the steel beams is detected.

[0022] Adjusting the camber of the steel beams: The steel beams on both sides are lifted by the vertical positioning components to meet the camber requirements, and then support pads are set on the positioning beams to support the steel beams.

[0023] Welding the steel beams on both sides: Install the centering and fastening mechanism at the connection point of the steel beams on both sides and lock it in place, then perform the welding operation;

[0024] Dismantle the positioning mechanism: Use hoisting equipment to dismantle the positioning mechanism;

[0025] Remove the supporting mechanism: Install a lifting and unloading device on the steel beam, disconnect the standard section from the base section, lift the free section and the standard section using the lifting and unloading device, and remove the base section; then control the free section and the standard section to descend; repeat the disconnection, lifting, removal and descent process to remove the standard section and the free section from bottom to top.

[0026] The advantages and positive effects of this utility model are:

[0027] (1) By setting up a support mechanism, a support platform and a working platform are provided for the assembly and connection of steel beams, avoiding the need for large-scale temporary working platforms and greatly saving construction time and costs;

[0028] (2) By setting up a positioning mechanism, the installation position of the steel beam can be adjusted conveniently and accurately, and the two sections of steel beam can be positioned efficiently. Compared with the existing technology of using hoisting equipment to lift the two sections of steel beam in a suspended state for positioning and welding operations, the operation difficulty of positioning the steel beam is greatly reduced, the positioning efficiency is significantly improved, and welding operations can be carried out more conveniently, ensuring the assembly and connection quality of large-span steel beams.

[0029] (3) The support mechanism is dismantled by the lifting and unloading device, which avoids the long-term occupation of the hoisting equipment, and the construction efficiency is high, safe and fast. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the connection between the base section and the standard section in a specific embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of a free joint structure according to a specific embodiment of the present invention;

[0033] Figure 4 This is a top view schematic diagram of a free joint according to a specific embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the connection between the positioning mechanism and the free joint in a specific embodiment of this utility model;

[0035] Figure 6 This is a schematic diagram of the positioning component structure according to a specific embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the centering and fastening mechanism of a specific embodiment of this utility model.

[0037] In the picture:

[0038] 1. Supporting mechanism; 11. Foundation section; 111. Column; 112. Horizontal bar; 113. Diagonal brace; 12. Standard section; 13. Free section; 131. Support beam; 132. Working platform; 133. Guardrail; 14. Positioning pin; 15. Connecting lug; 16. Ladder; 2. Positioning mechanism; 21. Positioning beam; 22. Positioning assembly; 221. Connecting plate; 222. Limiting plate; 23. Fine adjustment assembly; 24. Vertical positioning assembly; 3. Centering and fastening mechanism; 31. Clamping parts; 32. Connecting parts; 4. Laser detection device; 5. Cable; 6. Steel beam; 7. Factory column. Detailed Implementation

[0039] The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0040] like Figure 1 As shown in the figure, this utility model embodiment proposes an aerial assembly device for large-span steel beams, including a support mechanism 1 and two positioning mechanisms 2. The support mechanism 1 is disposed between the factory columns 7 where the steel beams 6 are to be installed. The positioning mechanisms 2 are symmetrically disposed at the top of the support mechanism 1 along the axial direction of the steel beams 6, and include a pair of positioning components 22. The positioning components 22 can move along the axial direction perpendicular to the steel beams 6 to position and adjust the axial position of the steel beams 6.

[0041] The aforementioned support mechanism 1 is used to support the steel beam 6. Due to the limitations of span and installation conditions, the steel beam 6 is made into two or more sections. The support mechanism 1 in this application is set according to the number of sections of the steel beam 6 between the two factory columns 7. For example, when the steel beam 6 is divided into two sections, one support mechanism 1 is set. One end of each steel beam 6 section is supported by the factory column 7. The factory column 7 is provided with a connecting mechanism for connecting the steel beam 6. The other end of each steel beam 6 section is supported by the support mechanism 1, so that the connecting ends of the two steel beam sections 6 are located on the support mechanism 1. Similarly, when the steel beam 6 is divided into three sections, two support mechanisms 1 are set. At this time, the steel beams 6 located on both sides are jointly supported by the support mechanism 1 on the corresponding side and the factory column 7. The steel beam 6 located in the middle is jointly supported by two support mechanisms 1 at both ends, and so on.

[0042] It is understandable that the positioning of the steel beam 6 connected to the factory column 7 is accurate. Therefore, it is only necessary to adjust the position of the end connected to the support mechanism 1 to achieve precise positioning of the entire steel beam 6 installation position.

[0043] The aforementioned positioning mechanism 2 is used to position and adjust the axial position of the corresponding steel beam 6. By setting the position of the positioning component 22, the initial position of the steel beam 6 when it is placed on the support mechanism 1 can be limited. When the axial position of the steel beam 6 is different from the design position, by adjusting the position of the positioning component 22, the steel beam 6 can be moved in a direction perpendicular to its own axis, thereby adjusting the axial position of the steel beam 6 and aligning the two sections of steel beam 6 on the support mechanism 1 for easy assembly and connection. At the same time, the positioning component 22 can limit the steel beam 6 after positioning to prevent the steel beam 6 from shifting laterally during operation.

[0044] By setting up support mechanism 1, a support platform is provided for the assembly and connection of steel beams 6, avoiding the need for large-scale construction of temporary work platforms 132, and significantly saving construction time and costs. By setting up positioning mechanism 2, the installation position of steel beams 6 can be adjusted conveniently and accurately, completing the efficient positioning of the two sections of steel beams 6, and limiting and fixing the positioned steel beams 6 to improve the accuracy of welding operations. Compared with the existing technology of using hoisting equipment to lift the two sections of steel beams 6 in a suspended state for positioning and welding operations, the operation difficulty of positioning steel beams 6 is greatly reduced, the positioning efficiency is significantly improved, and welding operations can be carried out more conveniently, ensuring the assembly and connection quality of large-span steel beams 6.

[0045] Furthermore, in the embodiments of this application, such as Figures 1 to 4 As shown, the support mechanism 1 includes a ladder 16, a working platform 132, and a support beam 131. The bottom of the support mechanism 1 is fixed to the ground with anchor bolts. The ladder 16 extends from bottom to top to the support beam 131. The working platform 132 and the support beam 131 are located at the top of the support mechanism 1, with the support beam 131 positioned above the working platform 132. The positioning mechanism 2 is located on the support beam 131. With this technical solution, workers can use the ladder 16 to perform preliminary positioning and adjustment of the positioning mechanism 2 on the support beam 131, facilitating the positioning of the steel beam 6. Simultaneously, after positioning, welding operations can be performed on the steel beam 6 on the working platform 132, providing workers with a safer and more stable operating platform. Furthermore, the support mechanism 1 is fixed to the ground with anchor bolts, ensuring sufficient stability. To ensure operational safety, a guardrail 133 is also provided at the top of the support mechanism 1.

[0046] In a specific embodiment, such as Figure 1 , Figure 2As shown, the aforementioned support mechanism 1 is a frame structure, including several standard sections 12, free sections 13 connected to the upper end of the standard sections 12, and a base section 11 connected to the lower end of the standard sections 12. Each of the standard sections 12, free sections 13, and base section 11 includes a column 111. Adjacent columns 111 are connected by positioning pins 14 and locked together by connecting lugs 15 on the outer wall of the column 111. The base section 11 is fixed to the ground to provide stable foundation support. The standard sections 12 are repeatedly connected to form the support mechanism 1, which is close to the installation height of the supporting steel beam 6. The free sections 13 are connected to the upper end of the standard sections 12, and different specifications of free sections 13 can be selected to accommodate steel beams 6 of different heights. Through detachable connections, the number of base sections 11, standard sections 12, and free sections 13 can be flexibly selected and combined according to actual needs, which not only improves the applicability of the support mechanism 1 but also simplifies the manufacturing process, reduces costs, and makes assembly and transportation more convenient.

[0047] In the above embodiments, such as Figure 2 As shown, the foundation section 11 includes a base plate, columns 111, crossbars 112, diagonal braces 113, ladder sections 16, and connecting ears 15. The base plate is made of thick steel plate and has elongated holes at the bottom of the columns 111 for connecting anchor bolts embedded in the ground. The columns 111 are made of steel pipe and primarily support the load. The crossbars 112 are made of steel pipe or small steel, their specifications selected based on the weight of the steel beams 6, and are welded to the upper and lower positions of the columns 111, connecting them in pairs. The diagonal braces 113 are made of steel pipe or small steel and are welded obliquely between two columns 111. The ladder 16 is made of round steel or steel pipe and is welded to the outside of the crossbars 112. The connecting ears 15 are located on the upper outer side of each column 111 and can be connected vertically by connecting bolts.

[0048] In the above embodiments, such as Figure 2 As shown, the standard section 12 includes a column 111, a crossbar 112, a diagonal brace 113, a ladder 16 sections, and connecting ears 15. Unlike the foundation section 11, the connecting ears 15 of the standard section 12 are respectively set at the upper and lower ends of each column 111.

[0049] In the above embodiments, such as Figure 3 , Figure 4As shown, the free section 13 includes columns 111, crossbars 112, support beams 131, diagonal braces 113, 16 ladder sections, a working platform 132, and connecting ears 15. Unlike the standard section 12, the positioning beam 21 is made of steel profiles and welded to the upper part of the columns 111, connecting the four columns 111 to form an overall frame. The working platform 132 is paved with checkered plates and is connected to the columns 111 and the crossbars 112 at the bottom of the columns 111. Meanwhile, the connecting ears 15 are located on the outer side of the lower end of each column 111.

[0050] In the above embodiments, such as Figures 2 to 4 As shown, the locating pin 14 is made with two different sized heads on both sides. The smaller head can be inserted into the column tubes of two adjacent columns 111, enabling rapid installation between the base section 11, standard section 12, and free section 13. Simultaneously, after the two adjacent columns 111 are initially connected via the locating pin 14, the connecting lugs 15 of the two columns 111 are locked with bolts, ensuring a stable connection between the adjacent base section 11, standard section 12, and free section 13. This design not only improves installation efficiency but also ensures structural stability.

[0051] Preferably, the top of the free section 13 is also equipped with a railing to protect the workers; a prefabricated fall arrestor is also installed for workers to hang on when climbing up and down the ladder 16.

[0052] Furthermore, in the embodiments of this application, such as Figure 4 , Figure 5 As shown, the positioning mechanism 2 also includes a positioning beam 21, which is mounted on the support beam 131 along a direction perpendicular to the axis of the steel beam 6. The top surface of the positioning beam 21 is a bearing surface, and its elevation is the same as the design elevation of the bottom surface of the steel beam 6. The function of the positioning beam 21 is to provide a horizontal bearing surface on the support beam 131 for placing the steel beam 6. The design elevation of its top surface is the same as the design elevation of the bottom surface of the steel beam 6, ensuring that the steel beam 6 can be placed accurately and stably. The steel beam 6 can be stably placed vertically along the bearing surface of the positioning beam 21. The length of the positioning beam 21 is greater than the width of the steel beam 6, ensuring that the steel beam 6 can be firmly fixed on the bearing surface and can still provide stable support for the steel beam 6 when its position is adjusted and positioned later. Through the cooperation of the positioning beam 21 and the support beam 131, the effective positioning and stable installation of the steel beam 6 in terms of height are achieved, ensuring the safety of the operation.

[0053] Specifically, the support beam 131 and the positioning beam 21 are provided with corresponding connection holes and are detachably connected by bolts; the two positioning beams 21 are symmetrically arranged on the support beam 131 at the top of the free section 13 to ensure that the support mechanism 1 is subjected to balanced force as a whole.

[0054] Furthermore, in the embodiments of this application, such as Figure 5 , Figure 6 As shown, the positioning assembly 22 is symmetrically arranged on the bearing surface, including a connecting plate 221 and a limiting plate 222 vertically arranged in the middle of the connecting plate 221. The connecting plate 221 has elongated holes that are bolted to the positioning beam 21, and the limiting plate 222 is aligned with the center line of the positioning beam 21. Specifically, the connecting plates 221 are respectively arranged at opposite ends in the length direction of the positioning beam 21. The connecting plates 221 on both sides of the limiting plate 222 are provided with elongated holes, and the length direction of the elongated holes is the same as the length direction of the positioning beam 21. By loosening the bolts, the position of the connecting plates 221 on the positioning beam 21 can be adjusted to control the distance between the two connecting plates 221. When the steel beam 6 is placed between the two connecting plates 221, the limiting plates 222 abut against both sides of the steel beam 6. By adjusting the position of the connecting plates 221, the steel beam 6 can be moved to achieve the positioning and adjustment of the steel beam 6. Meanwhile, the limiting plate 222 is designed to be aligned with the center line of the positioning beam 21, which is beneficial to the balance of force on the steel beam 6 and ensures that the steel beam 6 remains stable during movement. Preferably, the upper part of the limiting plate 222 is designed as a right trapezoid, and the inclined side is set on the side where the two limiting plates 222 are relatively close. The lower part of the limiting plate 222 is square, and this side is the contact side between the limiting plate 222 and the steel beam 6. By setting this, the conflict between the limiting plate 222 and the steel beam 6 can be avoided, and the steel beam 6 can be placed between the limiting plates 222 more conveniently.

[0055] Furthermore, in the embodiments of this application, such as Figure 5 , Figure 6 As shown, the positioning mechanism 2 also includes a fine-tuning component 23, which is located on the outer side of the positioning component 22. The fine-tuning component 23 includes a first driving member and a first telescopic member. The first telescopic member can move closer to or further away from the positioning component 22 under the action of the first driving member. It can be understood that, in order to facilitate the positioning of the steel beam 6, the distance between the limiting plates 222 should be slightly larger than the width of the steel beam 6. The fine-tuning component 23 is used to precisely adjust the position of the steel beam 6 after the initial positioning. When there is a deviation between the axial position of the positioned steel beam 6 and the design axial position, the first telescopic member is extended to the opposite side by opening the fine-tuning component 23 on one side until the first telescopic member abuts against the limiting plate 222 and drives the limiting plate 222 and the connecting plate 221 to move along the elongated hole of the positioning beam 21, thereby driving the steel beam 6 to move the required distance to the other side, so that the axial position of the steel beam 6 coincides with the design axial position. The first driving member has sufficient driving force to resist the friction between the steel beam 6 and the bearing surface, so that the steel beam 6 moves slowly.

[0056] Furthermore, in the embodiments of this application, such as Figure 6As shown, the positioning mechanism 2 also includes a vertical positioning component 24, which is located at the middle of the positioning beam 21 along its length. The vertical positioning component 24 includes a second driving member and a second telescopic member. The second telescopic member can extend or retract from the bearing surface under the action of the second driving member. The vertical positioning component 24 is used to lift the steel beam 6 located on the bearing surface. By lifting the corresponding steel beam 6 with two vertical positioning members, the camber formed after the two steel beams 6 are connected together meets the design requirements.

[0057] Furthermore, in the embodiments of this application, such as Figure 7 As shown, the aerial assembly device for large-span steel beams proposed in this application also includes an alignment and fastening mechanism 3. The alignment and fastening mechanism 3 includes clamping parts 31 and connecting parts 32. The clamping parts 31 are disposed at both ends of the connecting parts 32 and include at least two positioning steel plates parallel to the connecting parts 32. The spacing between the positioning steel plates is the same as the thickness of the upper flange plate of the steel beam 6. Specifically, the clamping parts 31 are three steel plates welded to form an "F" shape, of which the two parallel steel plates are positioning steel plates. The connecting parts 32 are screws connected to another steel plate perpendicular to the positioning steel plates. Several connecting parts 32 are evenly arranged along the length direction of the steel plate. In use, the two clamping parts 31 are clamped on both sides of the width direction of the steel beam 6, close to the connection part of the two sections of the steel beam 6. Then, the connection length of the connecting parts 32 is adjusted so that the upper flange plates of the two sections of the steel beam 6 are clamped between the two positioning steel plates, thereby locking and fixing both sides of the connection part of the two sections of the steel beam 6 to facilitate the alignment and welding of the steel beam 6 and prevent deformation during the welding process.

[0058] In the embodiments of this application, such as Figure 1 As shown, this application also includes a laser detection device 4 for detecting the straightness of the steel beam 6 and a lifting self-unloading device for dismantling the support mechanism 1. By setting the laser detection device 4, it can be ensured that the straightness of the steel beams 6 on both sides meets the design requirements before welding. By setting the lifting self-unloading device, the support mechanism 1 can be dismantled by replacing the hoisting equipment, avoiding long-term occupation of the hoisting equipment and saving construction costs. In a specific embodiment, the lifting self-unloading device is an electric hoist, which is set on the steel beam 6 after the steel beam 6 is welded together, corresponding to the position of the support mechanism 1.

[0059] This application also proposes an aerial assembly and connection method for large-span steel beams, employing the aerial assembly device for large-span steel beams proposed in this application, including the following steps:

[0060] S1. Anchor bolts: Anchor bolts are pre-embedded during the construction of the factory foundation according to the installation position of support mechanism 1.

[0061] In this embodiment, the support mechanism 1 is evenly arranged along the centerline of the columns 7 of the factory building. The centerline of the support mechanism 1 coincides with the centerline of the columns and corresponds to the segment position of the steel beam 6.

[0062] S2. Install the base section 11 and standard section 12: Assemble the standard sections 12, free sections 13 and base section 11 of the support mechanism 1 on the ground, connect the base section 11 with anchor bolts, and then install the standard sections 12 in sequence from bottom to top.

[0063] In this embodiment, when assembling and connecting the base section 11 and the standard section 12 or the standard section 12 and the standard section 12, the positioning pin 14 is installed on the two diagonally opposite columns 111 located below, and then the upper column 111 is installed on the positioning pin 14. After the four columns 111 are aligned, the upper and lower columns 111 are fastened together by bolts passing through the connecting ears 15.

[0064] S3. Assemble the positioning mechanism 2: Assemble and connect the positioning beam 21, positioning component 22, fine adjustment component 23 and vertical positioning component 24 on the ground to form the positioning mechanism 2, and assemble and connect the positioning mechanism 2 with the free joint 13.

[0065] In this embodiment, the positioning component 22, the fine-tuning component 23, and the vertical positioning component 24 are all bolted to the positioning beam 21, and the positioning components are bolted to the support beam 131 on the upper part of the free section 13; the guardrail 133 is installed on the upper part of the free section 13.

[0066] S4. Install positioning mechanism 2: Install the free section 13 and positioning mechanism 2 on the top of the standard section 12 using hoisting equipment;

[0067] The specific method is the same as step S3, completing the assembly and connection of the free section 13 and the standard section 12; after installation, the free section 13 and the standard section 12 are connected and fixed to the ground in the longitudinal and transverse directions using cable 5, increasing the stability of the free section 13 and the entire support mechanism 1.

[0068] S5. Adjust the position of the positioning component 22: make the limiting plate 222 of the positioning component 22 located on the center line of the positioning beam 21, and make the distance between the two limiting plates 222 match the width of the lower flange plate of the steel beam 6.

[0069] In this embodiment, the distance between the two limiting plates 222 after adjustment is about 10mm-20mm larger than the width of the lower flange plate of the steel beam 6. Then, the connecting plate 221 is fixed to the positioning beam 21 by bolts.

[0070] In this application, when adjusting the position of the limiting plate 222, the center point of the line connecting the two limiting plates 222 is located on the design axis of the steel beam 6, so as to perform preliminary positioning of the steel beam 6;

[0071] S6. Hoisting and positioning one side steel beam 6: Hoisting the one side steel beam 6 onto the factory building column 7 and positioning mechanism 2 using hoisting equipment, and adjusting the center line position of the one side steel beam 6 by using positioning component 22 and fine adjustment component 23 to make the center line of the steel beam 6 coincide with the designed center line;

[0072] During hoisting, it is essential to ensure that the steel beam 6 moves slowly and stably. Guided by the limiting plates 222 of the positioning component 22, the steel beam 6 should be placed on the pre-set design axis as much as possible. Since the distance between the two limiting plates 222 is larger than the width of the lower flange of the steel beam 6, the actual axis position of the steel beam 6 will inevitably deviate from the designed axis position when it is initially placed. At this time, the positioning component 22 and the fine adjustment component 23 are used for adjustment, including loosening the bolts between the positioning component 22 and the positioning beam 21, activating the first drive component, extending the first telescopic component and pushing the positioning component 22 to move slowly until the center line of the steel beam 6 coincides with the designed center line.

[0073] S7. Hoisting and positioning the other side steel beam 6: Repeat the previous step to complete the hoisting and positioning of the other side steel beam 6;

[0074] S8. Detect the straightness of the steel beam 6: Install the laser detection device 4 on the upper surface of the two steel beams 6 at opposite ends to detect the straightness of the upper surface of the steel beam 6.

[0075] S9. Adjusting the camber of the steel beam 6: The steel beams 6 on both sides are lifted by the vertical positioning components 24 to meet the camber requirements. Then, support pads are set on the positioning beam 21 to support the steel beam 6.

[0076] Specifically, the second drive component of the vertical positioning component 24 under the two side steel beams 6 is activated respectively, so that the second telescopic component extends and slowly lifts the steel beam 6. After reaching the set height, a support pad is placed between the lower surface of the steel beam 6 and the bearing surface to support the steel beam 6. After the adjustment is completed, the straightness of the steel beam 6 is checked again by the laser detection device 4 to ensure that its straightness meets the requirements.

[0077] S10. Welding the steel beams on both sides 6: Install the centering and fastening mechanism 3 at the connection point of the steel beams on both sides 6 and lock it in place, then carry out the welding operation.

[0078] By setting the centering and fastening mechanism 3 to lock the connection parts of the steel beams 6 on both sides, deformation of the welding parts and their sides during the welding process can be prevented. The centering and fastening mechanism 3 can be removed after the welding operation is completed.

[0079] S11. Dismantle positioning mechanism 2: Dismantle positioning mechanism 2 using hoisting equipment;

[0080] After the assembly and welding of the steel beam 6 has passed the inspection, the positioning mechanism 2 can be removed.

[0081] S12, Dismantle support mechanism 1: Install a lifting and unloading device on the steel beam 6, disconnect the standard section 12 from the base section 11, lift the free section 13 and the standard section 12 through the lifting and unloading device, and dismantle the base section 11; then control the free section 13 and the standard section 12 to descend, repeat the disconnection, lifting, removal and descent, and dismantle the standard section 12 and the free section 13 from bottom to top.

[0082] After the positioning mechanism 2 is removed, a gap is formed between the steel beam 6 and the support mechanism 1. At this time, the lifting and unloading device is installed on both sides of the steel beam 6 and above the support mechanism 1. In this embodiment, four chain hoists are used to connect to the free section 13, which can ensure that the free section 13 and the standard section 12 remain stable during the lifting and lowering process.

[0083] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. An aerial assembly device for large-span steel beams, characterized in that: It includes a support mechanism and two positioning mechanisms. The support mechanism is disposed between the columns of the factory building where the steel beam is to be installed. The positioning mechanisms are symmetrically disposed at the top of the support mechanism along the axial direction of the steel beam and include a pair of positioning components. The positioning components can move along a direction perpendicular to the axial direction of the steel beam to position and adjust the axial position of the steel beam.

2. The aerial assembly device for large-span steel beams according to claim 1, characterized in that: The support mechanism includes a ladder, a working platform, and a support beam. The bottom of the support mechanism is fixed to the ground with anchor bolts. The ladder extends from bottom to top to the support beam. The working platform and the support beam are located at the top of the support mechanism, with the support beam positioned above the working platform. The positioning mechanism is located on the support beam.

3. The aerial assembly device for large-span steel beams according to claim 2, characterized in that: The support mechanism includes several standard sections, free sections connected to the upper end of the standard sections, and a base section connected to the lower end of the standard sections; each of the standard sections, the free sections, and the base section includes a column, and adjacent columns are connected by positioning pins and locked by connecting lugs on the outer wall of the column.

4. The aerial assembly device for large-span steel beams according to claim 2 or 3, characterized in that: The positioning mechanism further includes a positioning beam, which is disposed on the support beam in a direction perpendicular to the axis of the steel beam; the top surface of the positioning beam is a bearing surface, and the elevation of the bearing surface is the same as the design elevation of the bottom surface of the steel beam.

5. The aerial assembly device for large-span steel beams according to claim 4, characterized in that: The positioning components are symmetrically arranged on the bearing surface, including a connecting plate and a limiting plate vertically arranged in the middle of the connecting plate. The connecting plate has an elongated hole that is bolted to the positioning beam. The two limiting plates are inclined outward on the side that is relatively close to each other and aligned with the center line of the positioning beam.

6. The aerial assembly device for large-span steel beams according to claim 5, characterized in that: The positioning mechanism further includes a fine-tuning component, which is disposed on the opposite side of the positioning component and includes a first driving member and a first telescopic member. The first telescopic member can move closer to or further away from the positioning component under the action of the first driving member.

7. The aerial assembly device for large-span steel beams according to claim 6, characterized in that: The positioning mechanism further includes a vertical positioning component, which is disposed at the middle of the positioning beam along its length and includes a second driving member and a second telescopic member. The second telescopic member can extend or retract from the bearing surface under the action of the second driving member.

8. The aerial assembly device for large-span steel beams according to claim 7, characterized in that: It also includes a centering and fastening mechanism, which includes a clamping member and a connecting member. The clamping member is disposed at both ends of the connecting member and includes at least two positioning steel plates parallel to the connecting member. The spacing between the positioning steel plates is the same as the thickness of the upper flange plate of the steel beam.

9. The aerial assembly device for large-span steel beams according to claim 8, characterized in that: It also includes a laser detection device for detecting the straightness of the steel beam and a lifting and unloading device for dismantling the support mechanism.

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