An overall hoisting device and process for a 100-meter-high cylindrical iron chimney steel frame

Abstract

The present invention discloses an integral hoisting device and process for a 100-meter-high cylindrical iron chimney steel frame, belonging to the field of building installation. It includes foundation piles, a foundation slab, a foundation pier, a first part of the steel frame, a second part of the steel frame, and a third part of the steel frame. The foundation piles are driven into the bottom of the foundation, the foundation slab is laid on several foundation piles, the foundation pier is arranged on the foundation slab, the first part of the steel frame is installed on the foundation pier, the second part of the steel frame is fixedly installed on the top of the first part of the steel frame, and the third part of the steel frame is fixedly installed on the top of the second part of the steel frame. The hoisting construction process of the 100-meter chimney and the external steel truss of the present invention can be applied to the installation construction of large-scale high-rise steel structures. The process is simple, safe and reliable, saves construction costs, and all the operations of the bottom gourd lifting are located on the ground, which is convenient for installation and maintenance, has higher operability and is safer in the face of emergencies.

Description

Technical Field

[0001] The present invention relates to the field of building installation, and particularly to an integral hoisting device and process for a steel frame of a 100-meter-high cylindrical iron chimney. Background Art

[0002] Chimneys at the 100-meter level belong to high-rise structures. Since the surrounding of the construction site is full of factory buildings, with dense equipment and a narrow construction site, it has a great impact on large-scale hoisting. It is impossible to find an effective hoisting position, and large cranes will not be able to enter the site for large-scale hoisting construction. If a tower crane is used for single-unit hoisting, although a large amount of space can be saved, the tower crane has low efficiency, will cost a high amount, extend the construction period, and the construction is all at high altitude, making it difficult to ensure safety.

[0003] Therefore, in the chimney renovation projects of some factories, due to the surrounding being full of factories or buildings, etc., the space is generally small, and it is very difficult to install the existing 100-meter-level steel chimneys. It is necessary to design a hoisting device and process to solve such technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an integral hoisting device and process for a steel frame of a 100-meter-high cylindrical iron chimney, so as to solve the technical problem of the difficult installation of the existing 100-meter-high cylindrical iron chimney in a dense building factory.

[0005] An integral hoisting device for a steel frame of a 100-meter-high cylindrical iron chimney includes foundation piles, a foundation slab, a foundation pier, a first part of the steel frame, a second part of the steel frame, and a third part of the steel frame. The foundation piles are driven into the bottom of the foundation, the foundation slab is laid on several foundation piles, the foundation pier is arranged on the foundation slab, the first part of the steel frame is installed on the foundation pier, the second part of the steel frame is fixedly installed on the top of the first part of the steel frame, and the third part of the steel frame is fixedly installed on the top of the second part of the steel frame.

[0006] Further, the foundation pier includes a concrete foundation pier, steel bars, embedded plates, fixed crossbars, outer sleeve steel pipes, inner sleeve reinforcing steel pipes, ring plates, and fixed installation boxes. The steel bars and the embedded plates are buried in the concrete foundation pier. The embedded plates are fixed on the tops of several steel bars by threads. The lower end of the outer sleeve steel pipe is buried in the concrete foundation pier and fixed on the embedded plate. The fixed crossbars are fixedly arranged on the outer side edges of the part of the outer sleeve steel pipe buried in the concrete foundation pier. The fixed crossbars are set as "T"-shaped steel structures, and the bottom of the "T"-shaped steel structure is welded to the side of the outer sleeve steel pipe. The inner sleeve reinforcing steel pipe is sleeved into the outer sleeve steel pipe. The ring plate is sleeved on the outside of the outer sleeve steel pipe and fixed at the top end of the concrete foundation pier. The fixed installation box is sleeved on the outside of the outer sleeve steel pipe and fixed on the ring plate.

[0007] Further, both the first part of the steel frame and the second part of the steel frame are composed of several single-section steel frames that gradually decrease in size, and the third part of the steel frame is composed of several single-section steel frames of equal size.

[0008] Further, a single-section steel frame includes four column structure pipes, diagonal braces, cross braces, and a platform structure plate. The four column structure pipes are all vertically inclined to form the four-corner support rod structure of a frustum. The diagonal braces are cross-arranged on the side formed by two column structure pipes. The cross braces are arranged in parallel on the top of the column structure pipes. The platform structure plate is arranged inside the frame structure formed by the four cross braces, and a chimney hole is provided on the platform structure plate.

[0009] Further, the present invention further includes a chimney hoisting device. The chimney hoisting device includes a support frame, an electric hoist, a chain, a chimney suspension reinforcement plate, and a chimney suspension ring. The support frame is fixedly arranged inside the bottom end of the first part of the steel frame. The electric hoist is fixed on the support frame. One end of the chain is connected to the electric hoist, and the other end is hung on the chimney suspension ring. The chimney suspension reinforcement plate is fixedly welded on the outer side of the chimney. Several chimney suspension reinforcement plates are arranged at equal intervals on the same horizontal line on the outer side of the chimney. The chimney suspension ring is locked on the outer side of the chimney and is arranged at the bottom of several chimney suspension reinforcement plates.

[0010] Further, the present invention further includes an anti-sway device. The anti-sway device is arranged on the side of the chimney hole. The anti-sway device is composed of four vertical guide rollers. One vertical guide roller is arranged on one side of the chimney hole, and the distance between two opposite vertical guide rollers is equal to the diameter of the chimney.

[0011] A hoisting process for the overall hoisting of a 100-meter-high cylindrical iron chimney steel frame. The process includes the following steps:

[0012] Step 1: Site selection. Drive foundation piles at the bottom of the selected chimney site, then lay a foundation plate on the foundation piles, and construct a fixed base pier on the foundation plate.

[0013] Step 2: Weld and assemble the first part of the steel frame, the second part of the steel frame, and the third part of the steel frame according to the designed dimensions, and use a crane to hoist the first part of the steel frame, the second part of the steel frame, and the third part of the steel frame in sequence.

[0014] Step 3: Use the reverse installation method to weld and install the chimney cylinder on the steel frame step by step.

[0015] Further, the specific process of step 2 is as follows:

[0016] Step 2.1: Assemble the steel frame. Assemble the profiles into the chimney steel frame according to the design drawings, rub and remove rust, apply anti-corrosion paint, and install the platform ladder. The steel frame is assembled to make the upper and lower steel frame planes, make the left and right steel frame columns, hoist and weld the upper steel frame plane to the left and right steel frame plane columns, make the left and right steel frame plane diagonal braces, and make the platform;

[0017] Step 2.2: Steel frame hoisting: Use a crane to hoist the finished steel frame to the installation location. Hoist the steel frame from a horizontal lying state to a vertical state. Use a 300-ton and a 100-ton all-terrain crane to complete the operation. Hoist the vertical steel frame to the installation location, measure the installation dimensions, ensure that the error is within the design and specification range, and weld the installed steel frame.

[0018] Step 2.3: Steel frame docking, weld the steel frame to the already in place steel frame, the docking points are divided into: 0-meter layer, the first part of the steel frame docks with the foundation embedded parts, 35-meter layer, the first part of the steel frame docks with the second part of the steel frame, 65-meter layer, the second part of the steel frame docks with the third part of the steel frame. After each part of the steel frame is installed, the elevation of the top four corners must be measured to ensure that the elevation of the four corners is at the same height to prepare for the next hoisting docking. Before docking, re-measure the elevation of the four corners to ensure installation accuracy. After the third part is hoisted to the installation position, the verticality of the third part should be measured using a theodolite.

[0019] Furthermore, the specific process of step 3 is as follows:

[0020] Use 10T electric hoists to lift the welded cylinder. 8 10T electric hoists are used for lifting at the same time from 0 to 35 meters, 10 10T electric hoists are used for lifting at the same time from 35 to 65 meters, and 12 10T electric hoists are used for lifting at the same time from 65 to 100 meters. The lifting height is about 2 meters each time. After the external trusses of the chimney are installed to the 65-meter layer, the chimney cylinder is hoisted. The hoist hanging point is located at 6.6 meters, and the hanging point uses a 20mm thick steel plate;

[0021] The clamping device used for chimney lifting is an expansion ring, which consists of channel steel and bolts. When the chimney body is lifted, the bolts are tightened and reinforcing ribs are welded at different positions of the chimney body to ensure that the body will not fall off from the expansion ring during lifting. The chimney body is lifted to the designated position, and a freight cart is used to transport the new body to the bottom. The lifting body is slightly lowered and welded to the new body. After the welding and adding of the body are completed, the expansion ring is loosened, the reinforcing ribs are cut off, and this step is repeated until the chimney reaches 100 meters. A 20mm thick steel plate is used for the hook hanging point.

[0022] Furthermore, the welding process of step 3 is as follows:

[0023] Put the prefabricated carbon steel outer cylinder and stainless steel inner cylinder together, and use a freight trolley to transport the sleeved cylinders to the bottom of the chimney that has been lifted in place;

[0024] Use a 10T electric hoist to lift the outer cylinder and butt it with the installed outer cylinder at the top. Then lower the outer cylinder by 3 - 5 mm and weld it with a welding gap of 3 - 5 mm. First, weld the inner wall of the outer cylinder;

[0025] Use a chain block to lift the stainless steel inner cylinder to the welding position inside the outer cylinder and weld the inner wall of the stainless steel cylinder. After welding, connect the inner cylinder and the outer cylinder with a connecting plate to integrate the outer cylinder and the inner cylinder, ensuring that the inner cylinder will not fall off during the lifting of the inner and outer cylinders and guaranteeing construction safety. Finally, weld the outer wall of the outer cylinder.

[0026] The present invention adopts the above technical solutions and has the following technical effects:

[0027] The hoisting construction technology of the 100 - meter chimney and the external steel truss of the present invention can be applied to the installation construction of large - scale high - rise steel structures. The process is simple, safe and reliable, saving construction costs. All the operations of the bottom hoist are located on the ground, which is convenient for installation and maintenance. In the face of emergencies, the operability is higher and safer. The hoisting device at the bottom is an electric hoist, with a simple structure and convenient maintenance. At the same time, an anti - sway device is set, which can effectively prevent the swaying situation during the actual welding process. Brief Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram of the hoisting device of the present invention.

[0029] Figure 2 is the structural schematic diagram of the base of the present invention.

[0030] Figure 3 is the cross - sectional view of the pier of the present invention.

[0031] Figure 4 is the structural schematic diagram of a single - section steel frame of the present invention.

[0032] Figure 5 is the structural schematic diagram of the chimney hoisting of the present invention.

[0033] Figure 6 is the structural schematic diagram of the chimney lifting reinforcement plate of the present invention.

[0034] Figure 7 is the structural schematic diagram of the anti - sway roller of the present invention.

[0035] Figure 8 is the steel frame hoisting procedure diagram of the present invention.

[0036] Figure 9It is a comparison diagram of the chimney cylinder before and after hoisting of the present invention.

[0037] Figure 10 It is a distribution diagram of the hanging points of the hoist of the present invention.

[0038] Figure 11 It is a schematic structural diagram of the chimney clamping device of the present invention.

[0039] Figure 12 It is a schematic diagram of the hoisting sequence of the inner and outer cylinders of the chimney of the present invention.

[0040] Figure 13 It is a welding position diagram of the connecting plate between the inner and outer cylinders of the chimney of the present invention.

[0041] Reference numerals in the figure: 1, foundation pile; 2, foundation slab; 3, foundation pier; 3.1, concrete foundation pier; 3.2, deformed bar; 3.3, embedded plate; 3.4, fixed cross bar; 3.5, outer sleeve steel pipe; 3.6, inner sleeve reinforcing steel pipe; 3.7, ring plate; 3.8, fixed installation box; 4, first part of steel frame; 4.1, column structure pipe; 4.2, diagonal brace; 4.3, cross brace; 4.4, platform structure plate; 5, second part of steel frame; 6, third part of steel frame; 7, chimney hoisting device; 7.1, electric hoist; 7.2, chain; 7.3, chimney suspension reinforcing plate; 7.4, chimney suspension ring; 8, chimney; 8.1, outer cylinder; 8.2, inner cylinder; 9, anti-sway device. Detailed implementation manners

[0042] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, preferred embodiments are given to further elaborate on the present invention. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be realized even without these specific details.

[0043] As Figure 1-2 As shown, an overall hoisting device for a 100-meter-high cylindrical iron chimney of the present invention includes a foundation pile 1, a foundation slab 2, a foundation pier 3, a first part of steel frame 4, a second part of steel frame 5 and a third part of steel frame 6. The foundation pile 1 is driven into the bottom of the foundation, the foundation slab 2 is laid on a number of foundation piles 1, the foundation pier 3 is arranged on the foundation slab 2, the first part of steel frame 4 is installed on the foundation pier 3, the second part of steel frame 5 is fixedly installed on the top of the first part of steel frame 4, and the third part of steel frame 6 is fixedly installed on the top of the second part of steel frame 5. 16 foundation piles 1 are driven, and the foundation slab 2 is made of sand and concrete with a thickness of about half a meter.

[0044] As Figure 3As shown in the figure, the base pier 3 includes a concrete base pier 3.1, threaded steel bars 3.2, embedded plates 3.3, fixed cross bars 3.4, outer sleeve steel pipes 3.5, inner sleeve reinforcing steel pipes 3.6, ring plates 3.7 and fixed installation boxes 3.8. The threaded steel bars 3.2 and the embedded plates 3.3 are buried in the concrete base pier 3.1. The embedded plates 3.3 are fixed to the tops of several threaded steel bars 3.2 by threads. The lower ends of the outer sleeve steel pipes 3.5 are buried in the concrete base pier 3.1 and fixed to the embedded plates 3.3. The fixed cross bars 3.4 are fixedly arranged on the outer side edges of the parts of the outer sleeve steel pipes 3.5 buried in the concrete base pier 3.1. The fixed cross bars 3.4 are arranged in a "T"-shaped steel structure, and the bottom of the "T"-shaped steel structure is welded to the side of the outer sleeve steel pipe 3.5. The inner sleeve reinforcing steel pipes 3.6 are sleeved into the outer sleeve steel pipes 3.5. The ring plates 3.7 are sleeved on the outer sides of the outer sleeve steel pipes 3.5 and fixed to the tops of the concrete base piers 3.1. The fixed installation boxes 3.8 are sleeved on the outer sides of the outer sleeve steel pipes 3.5 and fixed to the ring plates 3.7.

[0045] As Figure 4 shown in the figure, both the first part of the steel frame 4 and the second part of the steel frame 5 are composed of several single-section steel frames that gradually become smaller, and the third part of the steel frame 6 is composed of several single-section steel frames of equal size.

[0046] A single-section steel frame includes four column structure pipes 4.1, diagonal braces 4.2, cross braces 4.3 and a platform structure plate 4.4. The four column structure pipes 4.1 are all vertically inclined to form the corner support rod structure of a trapezoid. The diagonal braces 4.2 are cross-arranged on the sides formed by two column structure pipes 4.1. The cross braces 4.3 are arranged in parallel on the tops of the column structure pipes 4.1. The platform structure plate 4.4 is arranged inside the frame structure formed by the four cross braces 4.3, and the platform structure plate 4.4 is provided with chimney holes.

[0047] As Figure 5-6 shown in the figure, the chimney hoisting device 7 includes a support frame, an electric hoist 7.1, a chain 7.2, a chimney suspension reinforcement plate 7.3 and a chimney suspension ring 7.4. The support frame is fixedly arranged inside the bottom end of the first part of the steel frame 4. The electric hoist 7.1 is fixed to the support frame. One end of the chain 7.2 is connected to the electric hoist 7.1, and the other end is hung on the chimney suspension ring 7.4. The chimney suspension reinforcement plates 7.3 are fixedly welded to the outer side of the chimney, and several chimney suspension reinforcement plates 7.3 are arranged at equal intervals on the same horizontal line on the outer side of the chimney. The chimney suspension ring 7.4 is locked on the outer side of the chimney and arranged at the bottom of several chimney suspension reinforcement plates 7.3.

[0048] As Figure 7As shown in the figure, the anti-sway device 9 is arranged on the side of the chimney hole. The anti-sway device 9 is composed of four vertical guiding rollers. One vertical guiding roller is arranged on one side of the chimney hole, and the distance between two opposite vertical guiding rollers is equal to the chimney diameter.

[0049] As Figure 8-13 shown, a hoisting process for the overall iron chimney steel frame with a height of 100 meters. The chimney steel frame is divided into three parts. The first part is from 0 to 35m, the second part is from 35 to 65m, and the third part is from 65 to 95m. First, the first and second parts are hoisted by a QAY300A all-terrain crane, and the third part is hoisted by a QAY500A all-terrain crane.

[0050] ③ The chimney cylinder is installed by the reverse installation method. A ten-ton electric hoist is used to lift the cylinder ring. 8 electric hoists are used for 0 - 35m, 10 electric hoists are used for 35 - 65m, and 12 electric hoists are used for 65 - 100m.

[0051] The hoisting of the external steel truss of the chimney is mainly divided into three steps:

[0052] 1. Steel frame assembly: Assemble the profiles into the chimney steel frame according to the design drawings, and do a good job in rust removal, anti-corrosion work, and installation of platform ladders.

[0053] 2. Steel frame hoisting: Hoist the fabricated steel frame to the installation position by a crane.

[0054] 3. Steel frame docking: Weld the steel frame to the already installed steel frame. The docking points are: the steel frame at the 0-meter level is docked with the foundation embedded parts; at the 35-meter level: the first part and the second part are docked; at the 65-meter level: the second part and the third part are docked.

[0055] The steps of steel frame assembly are: 1. Fabricate the upper and lower steel frame planes. 2. Fabricate the left and right steel frame columns. 3. Hoist and weld the upper steel frame plane to the left and right steel frame plane columns. 4. Fabricate the left and right steel frame plane diagonal braces. 5. Fabricate the platform.

[0056] The steel frame is divided into three parts, with weights of 42 tons for the first part, 25 tons for the second part, and 16 tons for the third part.

[0057] The steel frame hoisting is divided into four steps:

[0058] Hoist the steel frame from the horizontal lying state to the vertical state, and complete the operation by using a 300-ton and a 100-ton all-terrain crane respectively. Hoist the vertical steel frame to the installation position, measure the installation dimensions, ensure that the error is within the design and specification range, and weld the installed steel frame.

[0059] After each part of the steel frame is installed, the elevation of the four corners on the top needs to be measured to ensure that the elevation of the four corners is at the same height in preparation for the next hoisting and docking. Before docking, re-measure the elevation of the four corners to ensure installation accuracy. After the third part is hoisted to the installation position, the verticality of the third part should be measured using a theodolite.

[0060] Use 10T electric hoists to lift the welded cylinder. 8 10T electric hoists are used to lift the cylinder from 0 to 35 meters, 10 10T electric hoists are used to lift the cylinder from 35 to 65 meters, and 12 10T electric hoists are used to lift the cylinder from 65 to 100 meters. The lifting height is about 2 meters each time.

[0061] The chimney barrel lifting clamping device is an expansion ring, which is mainly composed of 200 channel steel and M24×120 (4 sets) bolts. When the chimney barrel is lifted, tighten the bolts and weld reinforcing ribs (20mm) at different positions of the chimney barrel to ensure that the barrel will not fall off from the expansion ring during lifting. The chimney barrel is lifted to the designated position, and the new barrel is transported to the bottom by a freight trolley. The lifting barrel is slightly lowered and welded to the new barrel. After the welding and adding of the barrel are completed, the expansion ring is loosened, and the reinforcing ribs are cut off. Repeat this step until the chimney reaches 100 meters. The hook hanging point uses a 20mm thick steel plate.

[0062] The order of lifting the inner and outer cylinders of the chimney:

[0063] ① Put the pre-made carbon steel outer cylinder (φ2110×2000) and stainless steel inner cylinder (φ2000×1500) together, and use a freight cart to transport the cylinders to the bottom of the chimney that has been lifted into place.

[0064] ② Slightly lower the lifted cylinder to ensure that the welding gap is between 3-5mm. First weld the inner wall of the outer cylinder.

[0065] ③ Use a hand hoist to lift the stainless steel inner cylinder to the welding position and weld the inner wall of the stainless steel cylinder.

[0066] Finally, weld the outer wall of the outer cylinder, and use connecting plates to connect the inner cylinder and the outer cylinder (3mm, increased every 8 meters) to make them one body, so as to ensure that the inner cylinder will not fall off when the inner and outer cylinders are lifted, thus ensuring construction safety.

[0067] Compared with the top hydraulic lifting method, this inverted method uses a hoist to lift from the bottom and has the following advantages:

[0068] The top hydraulic lifting device is located at a high altitude. If the project adopts top lifting, the top width of the chimney steel frame is 3.5 meters × 3.5 meters. The space is small and the hydraulic lifting device is difficult to install and maintain.

[0069] All operations of the bottom gourd lifting are located on the ground, which is convenient for installation and maintenance. In case of emergencies, it has higher operability and is safer.

[0070] The lifting device used for bottom lifting is an electric hoist, which has a simple structure and is convenient for maintenance. The hydraulic lifting device has complex components and is inconvenient for installation and maintenance.

[0071] However, the bottom lifting has poor stability. When the chimney reaches a certain height, it is easy to shake and collide with the external steel frame, posing a safety hazard. Therefore, an anti-shake device must be added.

[0072] Since the diameter of the chimney cylinder is only 2 meters, while the height is 100 meters, and the height-width ratio is 50:1, it belongs to a slender and tall structure. The inverted lifting part is at the bottom of the chimney. During the inverted lifting process, if an anti-shake device is not used, when the chimney is lifted to a certain height (35 meters), the shaking angle of the chimney will not reach the safe shaking angle and will hit the external steel structure. If construction is carried out in windy weather, construction safety is difficult to guarantee. The anti-shake devices are installed at the 35-meter layer platform and the 55-meter layer platform respectively.

[0073] The anti-shake device consists of four vertical guide wheels, which can not only ensure that the inclination angle of the chimney is within the safe range during the lifting process, but also ensure that the chimney sways left and right due to the wind. In this way, it can not only ensure the smooth lifting of the chimney cylinder, but also ensure the uniform force of the lifting hoist.

[0074] In practical applications, taking the Shouguang Chenming Paper Additive Factory as an example, the hoisting construction technology of the 100-meter chimney and the external steel truss has achieved the effects of high efficiency, safety, and cost savings. 95% of the construction of this construction method is carried out on the ground, greatly reducing the probability of high-altitude operations and increasing the safety and reliability of construction. This construction technology adapts to various construction environments, occupies a small site, has simple equipment operation, and is convenient for maintenance. During the steel frame construction stage, the construction personnel are mainly divided into: 2 riveters, 4 anti-corrosion painters, and 9 welders. During the cylinder construction stage, the construction personnel are divided into: 2 riveters, 2 anti-corrosion painters, and 3 welders.

[0075] Since this chimney belongs to a tall structure, with surrounding factory buildings and equipment being dense and the construction site being narrow, and it is located along the railway, it has a great impact on large-scale hoisting. If an effective hoisting position cannot be found, large cranes will not be able to enter the site for large-scale hoisting construction. If a tower crane is used for single-unit hoisting, although a large amount of space can be saved, the tower crane has low efficiency, will cost a high amount, extend the construction period, and all construction is at high altitude, making safety difficult to guarantee.

[0076] The 100-meter-high high-quality steel chimney project of Shouguang Chenming Papermaking Auxiliary Factory. The chimney steel structure is divided into three parts and is hoisted in sections (three sections). The chimney cylinder uses the installed steel structure truss as the reverse installation foundation and is installed by the reverse installation method. 95% of the construction of this construction method is carried out on the ground, which greatly reduces the probability of high-altitude construction and increases the safety and reliability of construction. The project summarizes the manufacturing and installation technology of high-rise structures, providing technical reference for the future manufacturing and installation technology of high-rise structures. The 100-meter-high high-quality steel chimney of Shouguang Chenming Papermaking Auxiliary Factory is an exhaust gas emission device for a Swiss furnace. The external steel frame of the chimney is a structure of a cone plus a cuboid. The 0-65 meters is a cone truss structure. The length and width of the 0-meter layer (foundation layer) are 10 meters, and the length and width of the 65-meter layer are 3.5 meters. The 65-95 meters is a cuboid truss structure. The chimney body includes: a carbon steel outer cylinder with a diameter of 2110 mm and a stainless steel inner cylinder with a diameter of 2000 mm. The chimney cylinder is made of steel coil plates. The height of the carbon steel part of the cylinder is 2 meters, with a total of 50 cylinders, and the height of the stainless steel part of the cylinder is 1.5 meters, with a total of 67 cylinders.

[0077] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An overall hoisting device for a 100-meter-high cylindrical iron chimney steel frame, characterized in that: It includes foundation piles (1), a foundation slab (2), foundation piers (3), a first part of steel framework (4), a second part of steel framework (5) and a third part of steel framework (6). The foundation piles (1) are driven into the bottom of the foundation. The foundation slab (2) is laid on several foundation piles (1). The foundation piers (3) are arranged on the foundation slab (2). The first part of steel framework (4) is installed on the foundation piers (3). The second part of steel framework (5) is fixedly installed on the top of the first part of steel framework (4). The third part of steel framework (6) is fixedly installed on the top of the second part of steel framework (5); The foundation piers (3) include concrete foundation piers (3.1), steel reinforcing bars (3.2), embedded plates (3.3), fixed cross bars (3.4), outer sleeve steel pipes (3.5), inner sleeve reinforcing steel pipes (3.6), ring plates (3.7) and fixed installation boxes (3.8). The steel reinforcing bars (3.2) and the embedded plates (3.3) are embedded in the concrete foundation piers (3.1). The embedded plates (3.3) are fixed to the tops of several steel reinforcing bars (3.2) by threads. The lower ends of the outer sleeve steel pipes (3.5) are embedded in the concrete foundation piers (3.1) and fixed to the embedded plates (3.3). The fixed cross bars (3.4) are fixedly arranged on the outer side edges of the parts of the outer sleeve steel pipes (3.5) embedded in the concrete foundation piers (3.1). The fixed cross bars (3.4) are arranged as "T"-shaped steel structures. The bottoms of the "T"-shaped steel structures are welded to the sides of the outer sleeve steel pipes (3.5). The inner sleeve reinforcing steel pipes (3.6) are sleeved into the outer sleeve steel pipes (3.5). The ring plates (3.7) are sleeved on the outer sides of the outer sleeve steel pipes (3.5) and fixed to the tops of the concrete foundation piers (3.1). The fixed installation boxes (3.8) are sleeved on the outer sides of the outer sleeve steel pipes (3.5) and fixed to the ring plates (3.7); Both the first part of steel framework (4) and the second part of steel framework (5) are composed of several single-section steel frameworks that gradually become smaller. The third part of steel framework (6) is composed of several single-section steel frameworks of equal size; A single-section steel framework includes four column structure pipes (4.1), diagonal braces (4.2), cross braces (4.3) and a platform structure plate (4.4). The four column structure pipes (4.1) are all vertically inclined to form the corner support rod structures of a frustum. The diagonal braces (4.2) are cross-arranged on the sides formed by two column structure pipes (4.1). The cross braces (4.3) are arranged in parallel on the tops of the column structure pipes (4.1). The platform structure plate (4.4) is arranged inside the frame structure formed by the four cross braces (4.3), and the platform structure plate (4.4) is provided with chimney holes; It also comprises a chimney lifting device (7), the chimney lifting device (7) comprising a support frame, an electric hoist (7.1), a chain (7.2), a chimney suspension reinforcement plate (7.3) and a chimney suspension ring (7.4), the support frame is fixedly arranged inside the bottom end of the first steel frame (4), the electric hoist (7.1) is fixed on the support frame, one end of the chain (7.2) is connected to the electric hoist (7.1), and the other end is hung on the chimney suspension ring (7.4), the chimney suspension reinforcement plate (7.3) is fixedly welded to the outside of the chimney, and a plurality of chimney suspension reinforcement plates (7.3) are arranged at equal intervals on the same horizontal line on the outside of the chimney, and the chimney suspension ring (7.4) is locked on the outside of the chimney and arranged at the bottom of a plurality of chimney suspension reinforcement plates (7.3); It also includes an anti-sway device (9), which is arranged on the side of the chimney hole. The anti-sway device (9) is composed of four vertical guide rollers, one of which is arranged on a side of the chimney hole, and the distance between the two vertical guide rollers is equal to the diameter of the chimney.

2. The hoisting process of the hoisting device for the overall hoisting of the iron chimney steel frame with a height of one hundred meters according to claim 1, characterized in that: The process comprises the following steps: Step 1: Select a site, drive foundation piles (1) at the bottom of the selected chimney, then lay foundation plates (2) on the foundation piles (1), and construct fixed foundation piers (3) on the foundation plates (2); Step 2: Weld and assemble the first steel frame (4), the second steel frame (5) and the third steel frame (6) according to the designed dimensions, and use a crane to hoist the first steel frame (4), the second steel frame (5) and the third steel frame (6) in sequence; Step 3: Use the inverted installation method to weld and install the chimney body on the steel frame step by step; The specific process of step 2 is: Step 2.1: Assemble the steel frame. Assemble the profiles into the chimney steel frame according to the design drawings, rub and remove rust, apply anti-corrosion paint, and install the platform ladder. The steel frame is assembled to make the upper and lower steel frame planes, make the left and right steel frame columns, hoist and weld the upper steel frame plane to the left and right steel frame plane columns, make the left and right steel frame plane diagonal braces, and make the platform; Step 2.2: Steel frame hoisting: Use a crane to hoist the finished steel frame to the installation location. Hoist the steel frame from a horizontal lying state to a vertical state. Use a 300-ton and a 100-ton all-terrain crane to complete the operation. Hoist the vertical steel frame to the installation location, measure the installation dimensions, ensure that the error is within the design and specification range, and weld the installed steel frame. Step 2.3: Steel frame docking, weld the steel frame to the already in place steel frame, the docking points are divided into: in the 0-meter layer, the first part of the steel frame docks with the foundation embedded parts, in the 35-meter layer, the first part of the steel frame docks with the second part of the steel frame, in the 65-meter layer, the second part of the steel frame docks with the third part of the steel frame. After each part of the steel frame is installed, the elevation of the top four corners must be measured to ensure that the elevation of the four corners is at the same height to prepare for the next hoisting and docking. Before docking, re-measure the elevation of the four corners to ensure installation accuracy. After the third part is hoisted to the installation position, the verticality of the third part should be measured using a theodolite; The specific process of step 3 is as follows: Use a 10T electric hoist to lift the welded cylinder. For the range of 0 - 35 meters, use 8 10T electric hoists to lift simultaneously; for 35 - 65 meters, use 10 10T electric hoists to lift simultaneously; for 65 - 100 meters, use 12 10T electric hoists to lift simultaneously. The lifting height each time is 2 meters. Start the lifting of the chimney cylinder after the external truss of the chimney is installed to the 65 - meter level. The hanging points of the hoists are located at 6.6 meters, and 20 - mm thick steel plates are used for the hanging points. The clamping device used for the chimney lifting is an expansion ring, which consists of channel steel and bolts. When the chimney cylinder is lifted, tighten the bolts, and weld stiffening rib plates at different positions of the chimney cylinder to ensure that the cylinder will not fall off from the expansion ring during lifting. When the chimney cylinder is lifted to the designated position, use a freight trolley to transport the new cylinder to the bottom, slightly lower the lifted cylinder and weld it with the new cylinder. After the welding to increase the cylinder is completed, loosen the expansion ring and cut off the stiffening rib plates. Repeat this step until the chimney reaches 100 meters. 20 - mm thick steel plates are used for the hanging points of the lifting hooks. The welding process in step 3 is as follows: Put the pre - fabricated carbon steel outer cylinder and stainless steel inner cylinder together, and use a freight trolley to transport the assembled cylinders to the bottom of the chimney that has been lifted in place. Use a 10T electric hoist to lift the outer cylinder and butt it with the installed outer cylinder at the top, then lower the outer cylinder by 3 - 5 mm, and weld with a welding gap of 3 - 5 mm. First, weld the inner wall of the outer cylinder. Use a chain hoist to lift the stainless steel inner cylinder to the welding position within the outer cylinder, weld the inner wall of the stainless steel cylinder. After welding, connect the inner cylinder and the outer cylinder with a connecting plate to integrate the outer cylinder and the inner cylinder, ensure that the inner cylinder will not fall off during the lifting of the outer and inner cylinders, guarantee the construction safety, and finally weld the outer wall of the outer cylinder.

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