Installation method for adding roof structure in straddle carrier area in aged steel plant

Abstract

According to the roof installation method without dismantling and intervention of large hoisting equipment, an innovative sliding way type conveying installation method is adopted, the bearing capacity of an original structure is fully utilized, occupation of the operation area of a straddle carrier is avoided, and continuous production operation is ensured; and the roof component is stably conveyed to a mounting position along the steel wire rope slide way, so that horizontal traction and vertical positioning of the roof system component in a narrow space are realized. According to the technology, interference on production operation is avoided, the construction period is shortened more remarkably, the construction risk is reduced, an innovative technical path is provided for intelligent and green transformation of old industrial plants, and meanwhile low carbon and high efficiency of the construction process are achieved.

Description

Technical Field

[0001] This invention belongs to the field of factory renovation, specifically a method for adding a roof structure to the cross-train area in an old steelmaking factory. Background Technology

[0002] With the rapid development of my country's industrialized construction industry, more and more factories are facing the need for renovation and upgrading. Enclosed factory buildings help maintain a constant temperature and humidity production environment, which is crucial for temperature control in the steel production process. A stable temperature environment is beneficial to improving steel production efficiency and product quality, while reducing energy consumption and equipment wear and tear. In addition, enclosed factory buildings can effectively reduce dust and noise leakage, improve the surrounding environment of the factory area, and enhance the company's social image.

[0003] Many older factory buildings have passageways for steel ladles, with open roofs. Since these passageways frequently carry ladles carrying steel ladles, a roof structure needs to be added to create an enclosed factory to ensure stable molten steel temperatures and meet environmental requirements. Traditional construction methods involving demolition and reconstruction, or the use of large lifting equipment, result in long construction periods, high costs, and numerous safety hazards. The challenge of renovating these older factory buildings without disrupting production remains a significant technical hurdle, as lifting machinery cannot directly handle the lifting operations. Summary of the Invention

[0004] To address this issue, this invention proposes a roof installation method that eliminates the need for dismantling or large-scale lifting equipment. Employing an innovative sliding-track conveying installation method, it fully utilizes the existing structural load-bearing capacity, avoids obstructing the passageway of the overhead crane, and ensures uninterrupted production operations. Through the coordinated operation of double pulleys and a winch, roof components are smoothly conveyed to the installation position along a wire rope track, achieving horizontal traction and vertical positioning of the roof system components within a confined space. This process not only avoids interference with production operations but also significantly shortens the construction period and reduces construction risks, providing an innovative technological path for the intelligent and green transformation of old industrial plants, while simultaneously achieving low-carbon and high-efficiency construction.

[0005] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0006] A method for adding a roof structure to the cross-train area in an old steelmaking plant includes the following steps:

[0007] Step 1: Install two sets of temporary support frames on the existing steel columns of the factory building as fixed anchor points;

[0008] Step 2: Connect the two sets of support frames with a single steel wire rope to form a steel wire rope slide.

[0009] Step 3: Install double pulleys on the wire rope slide, and hang a chain electric hoist below the double pulleys;

[0010] Step 4: Set up winches at positions 9 and 14 on the ground, and connect the traction wire ropes of the two winches to both sides of the double pulleys;

[0011] Step 5: Transport the main and secondary roof beams to the ground position on Line 14 according to the installation sequence, and arrange them neatly by category;

[0012] Step Six: Use an electric chain hoist to lift the main roof beam, and then transport it horizontally to the installation position via double pulleys along the wire rope track. With manual fine-tuning, precise positioning can be achieved.

[0013] Step 7: Transport the roof purlins and horizontal supports to the ground position on line 14 in the order of installation, and arrange them neatly by category;

[0014] Step 8: Use an electric chain hoist to lift the roof purlins and horizontal supports in sequence, and transport them to the installation position via double pulleys along the wire rope track. With manual fine-tuning, precise positioning can be achieved.

[0015] Step 9: After the main roof beams, purlins and horizontal supports are installed, proceed with the high-strength bolt tightening and welding operations to ensure a firm structural connection.

[0016] Step 10: Remove the temporary support frame and wire rope slide, and clean up the construction equipment and materials on site.

[0017] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, the temporary support frame is composed of H-beams, double angle steel and connecting plates. The H-beams are horizontally installed on the original steel columns of the plant, and the two ends of the connecting plates are installed between the H-beams and the original steel columns of the plant via double angle steel.

[0018] The temporary support frame was firmly connected to the existing steel columns of the factory building by welding.

[0019] In the method for adding a roof structure to the cross-car area in an old steelmaking plant, the wire rope is fixed to the temporary support frame with shackles, and the tension of the wire rope is adjusted by a hand-operated hoist.

[0020] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, the lower part of the double pulleys is connected to the electric chain hoist by a shackle.

[0021] The winch traction wire rope and double pulleys are connected by a shackle to ensure uniform force and smooth sliding during operation.

[0022] In the method for adding a roof structure to the cross-train area in an old steelmaking plant, a winch is installed on the ground and connected to the original steel column of the plant to form a stable traction system, ensuring that the double pulleys run smoothly along the wire rope track.

[0023] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, the electric chain hoist is connected to the roof components through a self-locking lifting device, which includes a lifting base with a U-shaped structure.

[0024] The inner wall of the hanging seat is provided with symmetrically distributed inner recessed grooves, and the side of the inner recessed grooves is provided with vertically distributed guide grooves. A sliding shaft is installed in the guide groove, and a support plate is rotatably installed on the sliding shaft. A lower rotating part is hinged to the bottom of one end of the support plate. The lower rotating part is a telescopic structure.

[0025] A support rod is provided in the inner recessed groove. The support rod is distributed below the support plate and contacts the support plate. A clamping structure is provided at the end of the support plate away from the sliding shaft.

[0026] A connecting plate is slidably fitted inside the hanger, and a lifting ring is bolted to the middle of the connecting plate. The bottom of the lifting ring passes through the hanger, and the connecting plate is connected to the sliding shaft via a connecting rod.

[0027] The bottom of the recessed groove houses the battery, control switch, and electromagnet.

[0028] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, the roof main beam, purlins and horizontal supports constitute the roof components. Two sets of restraint corner plates are symmetrically distributed in the middle of the roof components. Each set of restraint corner plates has two distributed along the length of the roof components on both sides of the support plate.

[0029] In the method for adding a roof structure to the cross-car area in an old steelmaking plant, the hanging bracket is provided with an abutment rod, the bottom of which is used to abut against the roof hook.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] This invention proposes a roof installation method that eliminates the need for dismantling or large-scale lifting equipment. It employs an innovative sliding-track conveyor installation method, fully utilizing the existing structural load-bearing capacity, avoiding obstruction of the vehicle's operating area, and ensuring uninterrupted production. Through the coordinated operation of double pulleys and a winch, roof components are smoothly conveyed to the installation position along a wire rope track, achieving horizontal traction and vertical positioning of the roof system components within a confined space. This process not only avoids interference with production operations but also significantly shortens the construction period and reduces construction risks, providing an innovative technological path for the intelligent and green transformation of old industrial plants, while simultaneously achieving low-carbon and high-efficiency construction. Attached Figure Description

[0032] Figure 1 This is a side view of the overall structure of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0034] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0035] Figure 4 This is a top view of the roof to be constructed according to the present invention;

[0036] Figure 5 This is a structural side view of the roofing component of the present invention;

[0037] Figure 6 , Figure 7 , Figure 8 The diagram shows the structural cross-sections of the self-locking lifting component under three different conditions.

[0038] Figure 9 This is a structural schematic diagram of a self-locking lifting component;

[0039] Figure 10 This is a structural diagram showing the relationship between the support plate and the connecting rod.

[0040] Figure 11 This is a structural schematic diagram of the roof components and restraint corner plates. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Example 1

[0043] like Figures 1 to 5 As shown, a method for adding a roof structure to the cross-train area in an old steelmaking plant includes the following steps:

[0044] Step 1: Install two sets of temporary support frames 10 on the existing steel columns of the factory building as fixed anchor points;

[0045] Step 2: Connect the two sets of temporary support frames 10 with a steel wire rope to form a steel wire rope slide 1;

[0046] Step 3: Install double pulleys 2 on the wire rope slide 1, and hang the electric chain hoist 4 below the double pulleys 2;

[0047] Step 4: Set up winches at positions 9 and 14 on the ground respectively, and connect the two winches 8 to the two sides of the double pulley 2 with the traction wire rope 7.

[0048] Step 5: Transport the main and secondary roof beams to the ground position on Line 14 according to the installation sequence, and arrange them neatly by category;

[0049] Step Six: Use the electric chain hoist 4 to lift the main roof beam, and then transport it horizontally to the installation position via the double pulleys 2 along the wire rope slide 1. With the help of manual fine-tuning, precise positioning can be achieved.

[0050] Step 7: Transport the roof purlins and horizontal supports to the ground position on line 14 in the order of installation, and arrange them neatly by category;

[0051] Step 8: Use the electric chain hoist 4 to lift the roof purlins and horizontal supports in sequence, and transport them to the installation position along the wire rope slide 1 through the double pulleys 2. With the help of manual fine-tuning, precise positioning can be achieved.

[0052] Step 9: After the main roof beams, purlins and horizontal supports are installed, proceed with the high-strength bolt tightening and welding operations to ensure a firm structural connection.

[0053] Step 10: Remove the temporary support frame 7 and the wire rope slide 1, and clean up the construction equipment and materials on site.

[0054] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, the temporary support frame 10 is composed of H-beams 10-1, double angle steel 10-2 and connecting plates 10-3. The H-beams 10-1 are horizontally installed on the existing steel columns of the plant, and the two ends of the connecting plates 10-3 are installed between the H-beams 10-1 and the existing steel columns of the plant via the double angle steel 10-2.

[0055] The temporary support frame 10 is firmly connected to the existing steel columns of the factory building by welding.

[0056] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, the wire rope slide 1 and the temporary support frame 10 are fixed with shackles, and the tension of the wire rope slide 1 is adjusted by a hand-operated hoist 11.

[0057] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, the lower part of the double pulley 2 is connected to the electric chain hoist 4 by a shackle.

[0058] The winch 8 traction wire rope 7 and the double pulley 2 are connected by a shackle to ensure uniform force and smooth sliding during operation.

[0059] In the above-mentioned method for adding a roof structure to the cross-car area in an old steelmaking plant, a winch 8 is installed on the ground and connected to the original steel column of the plant to form a stable traction system, ensuring that the double pulleys 2 run smoothly along the wire rope slide 1.

[0060] The temporary support frame 10 is made of Q345B steel. Its structure consists of a triangular support frame composed of H-beams 10-1, double angle steel 10-2, and connecting plates 10-3. The H-beams are not smaller than HW400×400×13×21 to ensure that the bearing capacity meets the construction load requirements. The double angle steel 10-2 is L100×10. The connecting plates 10-3 are not less than 12mm thick. The components are connected by high-strength bolts or welded to ensure the stability and safety of the overall structure.

[0061] The temporary support frame 10 is used to support the double pulley wire rope slide system. It is installed on the web of the steel columns of line 9 and line 14 of the J axis of the factory building. The installation height should be about 2 meters higher than the design elevation of the roof to ensure that the roof components can pass smoothly and be firmly welded to the original steel columns of the factory building to ensure that there is no deformation or displacement during the load-bearing process.

[0062] The wire rope slide system is an aerial transport slide consisting of a wire rope slide 1, double pulleys 2, shackles, an electric chain hoist 4, and a hand-operated hoist 11. The wire rope slide 11 is made of high-strength steel wire rope with a nominal diameter of not less than φ18mm; the double pulleys 2 are lifting pulleys matched with the wire rope; the shackles and the electric chain hoist 4 have a rated load of not less than 3 tons; the hand-operated hoist 11 has a rated load of not less than 3 tons and is used to adjust the tension of the slide and for auxiliary positioning.

[0063] The wire rope slide system is arranged longitudinally along the factory building, running between lines 9 and 14. One end of the wire rope is anchored to the special node plate of the temporary support frame 10 using a shackle, and the other end is connected to the hand chain hoist 11 and anchored to the special node plate of the opposite temporary support frame 10. The tension of the wire rope slide 1 is adjusted by the hand chain hoist 11 to ensure that the slide is straight and without slack, and that it runs smoothly.

[0064] The double pulleys 2 are hung on the wire rope slide 1. They are connected to the electric chain hoist 4 with shackles to complete the horizontal transportation and precise positioning of the roof system components in the air. The whole process is under the unified command of a dedicated person to ensure the safety of the operation and the installation accuracy.

[0065] The winch traction system consists of a winch 8, a single pulley 9, and shackles. The winch 8 is an electric slow-speed winch with a rated traction force of not less than 5 tons. The traction wire rope 7 is a φ16mm high-strength wire rope, and its length is reasonably configured according to the actual site conditions. All connections are locked with standard shackles to prevent slippage. The single pulley 9 is a lifting pulley that matches the wire rope 7, and the shackle has a rated load of not less than 3 tons.

[0066] The two winches 8 are respectively positioned on the ground along lines 9 and 14 of the J-axis of the factory building, firmly fixed to the existing factory building columns. They are connected to double pulleys 2 via traction wire ropes 7, which change the traction direction through single pulleys 9. The process involves first loosening one winch 8 and its traction wire rope 7 to a certain length, then activating the other winch 8 to pull the wire rope 7, ensuring the smooth movement of the double pulleys 2 on the track. This ensures balanced force and smooth operation of the roof components during horizontal transport. The entire traction process is directed by a designated person, with real-time coordination via a wireless intercom system to ensure precise delivery of the components to the installation position, providing safety and precision support for subsequent hoisting operations.

[0067] The roof components are relatively lightweight and mainly consist of main beams, secondary beams, purlins, and horizontal supports. The main beams are welded to the existing steel columns, secondary beams, purlins, and horizontal supports to form a stable load-bearing system and ensure the integrity of the structure.

[0068] The roof system installation involves vertically lifting the roof components using an electric chain hoist 4 on line 14, then horizontally transporting them to the installation position via a winch 8 and double pulleys 2 along a wire rope track 1 using a wire rope guide 1. The components are then slowly lowered to the design elevation, completing the precise positioning and installation. During installation, strict control must be maintained over the deviation from the design elevation and axis, sequentially installing the main beams, secondary beams, purlins, horizontal supports, and other components.

[0069] The removal of temporary facilities and site cleanup are final tasks carried out after all roof components have been installed and passed inspection. First, the connection between the winch 8 traction wire rope 7 and the wire rope slide 1 is disconnected. Then, the chain electric hoist 4 and double pulleys 2 are dismantled. Subsequently, the wire rope slide 1 and temporary support frame 10 are removed. Finally, the work area is cleaned up, restoring the original working space of the factory building.

[0070] Example 2

[0071] Unlike Example 1, in order to achieve automatic release of roof components and reduce the amount of work at height, as follows: Figures 6 to 11 As shown, the electric chain hoist 4 and the roof component 6 are connected by a self-locking hanger 5. The self-locking hanger includes a hanger 5-1, which has a U-shaped structure. Symmetrically distributed inner grooves 5-2 are provided on the inner wall of the hanger 5-1. Vertically distributed guide grooves 5-3 are provided on the side of the inner grooves 5-2. A sliding shaft 5-4 is installed in the guide grooves 5-3. A support plate 5-5 is rotatably installed on the sliding shaft 5-4. A lower rotating member 5-6 is hinged to the bottom of one end of the support plate 5-5. The lower rotating member 5-6 is a telescopic structure.

[0072] A support rod 5-6 is provided in the inner recessed groove 5-2. The support rod 5-6 is distributed below the support plate 5-5 and contacts the support plate 5-5. A clamping structure is provided at the end of the support plate 5-5 away from the sliding shaft 5-4.

[0073] A connecting plate 5-7 is slidably fitted inside the hanging base 5-1. A lifting ring 5-8 is bolted to the middle of the connecting plate 5-7. The bottom of the lifting ring 5-8 passes through the hanging base 5-1. The connecting plate 5-7 is connected to the sliding shaft 5-4 via the connecting rod 5-9.

[0074] The bottom of the recessed groove 5-2 is equipped with a battery 5-10, a control switch and an electromagnet 5-11.

[0075] The hanging bracket 5-1 is provided with an abutment rod 5-13, the bottom of which is used to abut against the roof hook 6.

[0076] In practice, the contact rod 5-13 and the roof component 6 are kept in contact. The electromagnet 5-13 is de-energized by the control switch, and the sliding shaft 5-4 is released. Under the action of the lifting ring 5-8, the sliding shaft 5-4 moves upward and drives the other end of the support plate 5-5 (the tightening structure) to flip down, thereby flipping the tightening structure inward. At the same time, the downward rotating part 5-6 rotates down. After the tightening structure flips inward, the tightening structure completes the left and right positioning of the lifting seat 5-1 relative to the roof component 6. Then, the electric chain hoist 4 is used to lift the roof component 4. Two sets of constraint corner plates 6-1 are symmetrically distributed in the middle of the roof component 6. Each set of constraint corner plates 6-1 has two distributed along the length of the roof component 6 on both sides of the support plate 5-5 to prevent movement relative to the roof component 6 during the lifting process.

[0077] After the roof component 6 is connected to the existing factory structure by bolts, the lifting ring 5-8 is lowered, and the abutment rod 5-13 contacts the top of the roof component 6. Then, the lifting ring 5-8 is lowered further, and at the same time, the electromagnet 5-13 is energized by the control switch (wireless remote control switch). The sliding shaft 5-4 moves downward, and at the same time, the clamping structure flips up and retracts. After passing the upper wing plate of the roof component 6, the sliding shaft 5-4 is attracted and fixed by the electromagnet 5-13. At this time, the two clamping structures are located on both sides of the upper wing plate of the roof component 6. At this time, the lifting seat 5-1 is lifted. The lifting seat 5-1 and the lifting ring 5-8 will not move relative to each other, thus completing the automatic separation of the lifting seat 5-1 and the roof component 6.

[0078] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A method for installing a roof structure in the overpass area of ​​an old steelmaking plant, characterized in that, Includes the following steps: Step 1: Install two sets of temporary support frames on the existing steel columns of the factory building as fixed anchor points; Step 2: Connect the two sets of support frames with a single steel wire rope to form a steel wire rope slide. Step 3: Install double pulleys on the wire rope slide, and hang a chain electric hoist below the double pulleys; Step 4: Set up winches at positions 9 and 14 on the ground, and connect the traction wire ropes of the two winches to both sides of the double pulleys; Step 5: Transport the main and secondary roof beams to the ground position on Line 14 according to the installation sequence, and arrange them neatly by category; Step Six: Use an electric chain hoist to lift the main roof beam, and then transport it horizontally to the installation position via double pulleys along the wire rope track. With manual fine-tuning, precise positioning can be achieved. Step 7: Transport the roof purlins and horizontal supports to the ground position on line 14 in the order of installation, and arrange them neatly by category; Step 8: Use an electric chain hoist to lift the roof purlins and horizontal supports in sequence, and transport them to the installation position via double pulleys along the wire rope track. With manual fine-tuning, precise positioning can be achieved. Step 9: After the main roof beams, purlins and horizontal supports are installed, proceed with the high-strength bolt tightening and welding operations to ensure a firm structural connection. Step 10: Remove the temporary support frame and wire rope slide, and clean up the construction equipment and materials on site.

2. The method for adding a roof structure to the overpass area in an old steelmaking plant according to claim 1, characterized in that, The temporary support frame consists of H-beams, double angle steel, and connecting plates. The H-beams are horizontally installed on the existing steel columns of the factory building, and the two ends of the connecting plates are installed between the H-beams and the existing steel columns of the factory building via double angle steel. The temporary support frame was firmly connected to the existing steel columns of the factory building by welding.

3. The method for adding a roof structure to the overpass area in an old steelmaking plant according to claim 1, characterized in that, The wire rope is fixed to the temporary support frame with shackles, and the tension of the wire rope is adjusted by a hand-operated hoist.

4. The method for adding a roof structure to the overpass area in an old steelmaking plant according to claim 1, characterized in that, The lower part of the double pulleys is connected to the electric chain hoist by a shackle; The winch traction wire rope and double pulleys are connected by a shackle to ensure uniform force and smooth sliding during operation.

5. The method for adding a roof structure to the overpass area in an old steelmaking plant according to claim 1, characterized in that, The ground-mounted winch is connected to the original steel column of the factory building to form a stable traction system, ensuring that the double pulleys run smoothly along the wire rope track.

6. The method for adding a roof structure to the overpass area in an old steelmaking plant according to claim 1, characterized in that, The electric chain hoist is connected to the roof components via a self-locking lifting device, which includes a lifting base with a U-shaped structure. The inner wall of the hanging seat is provided with symmetrically distributed inner recessed grooves, and the side of the inner recessed grooves is provided with vertically distributed guide grooves. A sliding shaft is installed in the guide groove, and a support plate is rotatably installed on the sliding shaft. A lower rotating part is hinged to the bottom of one end of the support plate. The lower rotating part is a telescopic structure. A support rod is provided in the inner recessed groove. The support rod is distributed below the support plate and contacts the support plate. A clamping structure is provided at the end of the support plate away from the sliding shaft. A connecting plate is slidably fitted inside the hanger, and a lifting ring is bolted to the middle of the connecting plate. The bottom of the lifting ring passes through the hanger, and the connecting plate is connected to the sliding shaft via a connecting rod. The bottom of the recessed groove houses the battery, control switch, and electromagnet.

7. The method for adding a roof structure to the overpass area in an old steelmaking plant according to claim 6, characterized in that, The roof main beam, purlins and horizontal supports constitute the roof components. Two sets of restraint corner plates are symmetrically distributed in the middle of the roof components. Each set of restraint corner plates has two plates distributed along the length of the roof components on both sides of the support plate.

8. The method for installing a roof structure in the overpass area of ​​an old steelmaking plant according to claim 6, characterized in that, The hanger is equipped with an abutment rod, the bottom of which is used to abut against the roof hook.

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