A non-linear integral pushing method and system for a large blast furnace

Abstract

The present application relates to the field of blast furnace construction technology, in particular to a large blast furnace non-linear integral pushing method and system. In view of the problem that the prior art cannot bypass the intermediate obstacles in the pushing path, the present application adopts two independent straight tracks arranged at a 0°-90° angle in the transfer docking area, and realizes non-linear integral pushing through five stages of parallel prefabrication, first linear pushing, transfer rigid integration reversing, second linear pushing and resetting and fixing. Among them, the transfer rigid integration reversing adopts full-welding fixation of the sliding shoe and the transition slide rail and pours micro-expansion concrete, so that the upper load bracket and the lower load foundation form a permanent rigid whole, and the direction conversion is completed. Both times of pushing are pure linear motion without lateral force, high in safety and precision. The present application can bypass any intermediate obstacles, and is suitable for the integral translation of large equipment such as blast furnaces, converters and hot blast furnaces under the condition of complex factory space limitation, low in construction cost, short in construction period and high in landing precision.

Description

Technical Field

[0001] This invention relates to the field of blast furnace construction technology, specifically to a method and system for the non-linear integral moving of a large blast furnace. Background Technology

[0002] During major overhauls and renovations of blast furnaces, in order to shorten the construction period and reduce downtime losses, the overall relocation technology is gradually replacing the traditional "old furnace dismantling-on-site assembly" process. However, the existing overall blast furnace relocation technology faces two major insurmountable technical bottlenecks: First, single-segment linear relocation has strict spatial limitations. This technology requires the relocation track to be continuous and collinear throughout the entire process without any obstacles. When existing permanent facilities such as factory building columns, equipment foundations, and underground pipelines are located exactly in the middle of the linear relocation path, single-segment linear relocation is completely impossible, and only traditional processes can be used, resulting in a total construction period of 6-8 months and production stoppage losses exceeding 100 million yuan.

[0003] Second, existing non-linear moving technologies have significant drawbacks. Real-time steering non-linear moving requires continuous adjustment of the travel direction during the moving process, resulting in complex track structures, difficult guidance, and a tendency to deviate and jam. Furthermore, the angle between the thrust direction and the track constantly changes, easily leading to track deformation and breakage, as well as damage to the furnace structure, posing extremely high safety risks. Intermediate overlapping moving only achieves the transition between two track sections through simple overlapping, lacking a reliable rigid fixing structure, resulting in insufficient overall rigidity. Secondary moving is prone to misalignment and deformation, making it difficult to guarantee positioning accuracy. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for non-linear overall moving of a large blast furnace, which breaks through spatial limitations and forms a broken path with an arbitrary angle by splicing two independent straight tracks, bypassing obstacles in the middle of the path and improving construction efficiency.

[0005] The technical solution adopted by this invention to solve its technical problem is a method for non-linear overall movement of a large blast furnace, comprising the following steps: In the parallel prefabrication stage, the first section of straight track is constructed in the initial prefabrication area, the upper support bracket is made on the first section of straight track, and the prefabrication of the permanent furnace body foundation of the blast furnace is completed on the upper support bracket; at the same time, the second section of straight track and the lower support foundation are constructed in the transfer docking area, and the transition slide rail on the top surface of the lower support foundation is docked with the end of the first section of straight track. In the first linear movement, the first jacking device on the first section of the linear track is activated, and the upper support bracket is moved linearly along the direction of the first section of the linear track, so that the first slipper at the bottom of the upper support bracket slides into the transition slipper on the top surface of the lower support foundation and aligns with it; The intermediate rigid integration and reversal involves rigidly fixing the first slipper at the bottom of the upper bearing bracket to the transition slide rail on the top surface of the lower bearing foundation, and pouring concrete to make the upper bearing bracket and the lower bearing foundation form a rigid whole, thus completing the conversion of the pushing direction; The second linear push involves activating the second jacking device on the second section of the linear track to push the rigid whole, along with the permanent furnace body foundation, in a straight line along the direction of the second section of the linear track to the final installation position. During the repositioning and fixing stage, grouting is performed at the final installation position to fix the furnace bottom, thus completing the installation of the blast furnace.

[0006] Furthermore, the rigid fixing adopts a full welding method, welding the first slipper at the bottom of the upper bearing bracket to the transition slide rail head and tail on the top surface of the lower bearing foundation; the concrete is micro-expansion concrete, which is cured to the design strength after pouring.

[0007] Furthermore, the first segment of the straight track and the second segment of the straight track are at an angle of... The included angle, 0° < ≤90°.

[0008] Furthermore, the speed of the first linear movement is 40-60 mm / min, and the speed of the second linear movement is 30-50 mm / min; during the parallel prefabrication stage, the height difference and gap at the joint between the end of the first section of linear track and the transition slide rail are adjusted by an adjustable pad.

[0009] A non-linear integral moving system for a large blast furnace, used in a method for non-linear integral moving of a large blast furnace, comprising: A first section of straight track and a second section of straight track. The first section of straight track extends from the initial prefabrication area to the intermediate docking area, and the second section of straight track extends from the intermediate docking area to the final installation area. The first section of straight track and the second section of straight track are aligned at an angle... The included angle, 0° < ≤90°; The upper support bracket is set above the first section of the straight track. The permanent furnace body foundation of the blast furnace is set above the upper support bracket, and the bottom is fixed with a first sliding shoe that is compatible with the first section of the straight track. The lower support base is set above the second section of the straight track, and the bottom is fixed with a second sliding shoe that is compatible with the second section of the straight track. The top surface is covered with a transition sliding rail that is aligned with the end of the first section of the straight track. The first jacking device is set on the first section of the straight track and is used to drive the upper support bracket to move along the first section of the straight track. The second jacking device is installed on the second section of the straight track and is used to drive the lower supporting foundation to move along the second section of the straight track.

[0010] Furthermore, both the first and second straight track sections include at least three main slide rails.

[0011] Furthermore, both the first and second jacking devices are snap-fit ​​pin-stepping devices. Each snap-fit ​​pin-stepping device includes a snap-fit ​​reverse thrust support. The bottom of the snap-fit ​​reverse thrust support has a U-shaped groove that mates with the main slide rail, and a through hole is provided on the side of the U-shaped groove. The main slide rail has connecting holes spaced apart to mate with the through holes. A transverse pin is provided within the through hole, and an anti-disengagement pin is provided at the end of the transverse pin. A hydraulic cylinder is mounted on the snap-fit ​​reverse thrust support, and both ends of the hydraulic cylinder have hinged lugs. The fixed end of the hydraulic cylinder is hinged to the snap-fit ​​reverse thrust support. The output end of the hydraulic cylinder is hinged to a guide jacking frame. The bottom of the guide jacking frame has a guide groove that mates with the main slide rail, and guide rollers are installed on both sides of the inner cavity of the guide groove. The front end of the guide jacking frame is rigidly connected to the upper support bracket.

[0012] Furthermore, the hole spacing of the connecting holes is 500-1500mm, the stroke of the hydraulic cylinder is 0.5-1.5m, and the rated thrust is 1500-3000kN; the gap between the U-shaped slot and the main slide rail is 1-2mm; and the gap between the guide roller and the side of the main slide rail is 0.5-1mm.

[0013] Furthermore, the upper support bracket includes a bottom steel plate, a steel reinforcing mesh welded to the bottom steel plate, and a concrete pad layer poured on top of the steel reinforcing mesh, on which the permanent blast furnace foundation is poured.

[0014] Furthermore, a sliding liner is provided on the upper surface of the main slide rail; a carburized and quenched layer is provided on the surface of the main slide rail; the sliding liner is a polytetrafluoroethylene sliding plate filled with copper powder; and graphite lubricant is provided on the upper and lower surfaces of the sliding liner.

[0015] The beneficial effects of this invention are as follows: This invention enables the overall movement of a blast furnace in scenarios with obstacles in the middle of the path, bypassing obstacles of any size and location. Its applicability covers over 90% of complex plant areas, filling a technological gap in the industry. Both movements are purely linear motions, with the jacking force always parallel to the track, without any lateral component, reducing the risk of track deformation by 80%. Through double fixing via welding of slippers and concrete pouring, the overall rigidity is completely equivalent to that of a cast-in-place foundation, eliminating any risk of deformation or misalignment during the secondary movement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2This is a schematic diagram of a snap-fit ​​pin stepper device; Figure 3 This is a schematic diagram showing the engagement of the snap-fit ​​pin stepping device with the main slide rail; Figure 4 This is a schematic diagram of the upper support bracket; Figure 5 yes Figure 4 A sectional view; Figure 6 This is a schematic diagram showing the combination of the bottom steel plate and the steel reinforcement mesh.

[0017] Reference numerals: 1-First section of linear track; 2-Second section of linear track; 3-Upper load-bearing bracket; 4-Permanent blast furnace foundation; 5-First jacking device; 6-Lower load-bearing foundation; 7-Transition slide rail; 8-Second jacking device; 9 Main slide rail; 10-Interlocking reverse thrust support; 11-U-shaped slot; 12-Connecting hole; 13-Transverse pin; 14-Hydraulic cylinder; 15-Guide jacking frame; 16-Guide groove; 17-Bottom steel plate; 18-Steel reinforcing mesh; 19-Concrete pad; 20-Sliding liner. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] See Figures 1-3 A large blast furnace non-linear integral moving system, comprising: A first straight track segment 1 and a second straight track segment 2 are connected. The first straight track segment 1 extends from the initial prefabrication area to the intermediate docking area, and the second straight track segment 2 extends from the intermediate docking area to the final installation area. The first straight track segment 1 and the second straight track segment 2 are positioned at an angle... The included angle, 0° < ≤90°; The upper support bracket 3 is set above the first section of the straight track 1. The upper support bracket 3 is set above the permanent furnace body foundation 4 of the blast furnace, and the bottom is fixed with a first sliding shoe that is compatible with the first section of the straight track 1. The lower support base 6 is set above the second section of the straight track 2, and the bottom is fixed with a second sliding shoe that is adapted to the second section of the straight track 2. The top surface is covered with a transition slide rail 7 that is aligned with the end of the first section of the straight track 1. The first jacking device 5 is set on the first section of the straight track 1 and is used to drive the upper support bracket 3 to move along the first section of the straight track 1. The second jacking device 8 is installed on the second section of the straight track 2 and is used to drive the lower supporting foundation 6 to move along the second section of the straight track 2.

[0020] The first section of the straight track 1 comprises multiple steel columns arranged at regular intervals along the track's extension direction. The columns are made of hot-rolled H-beams or welded box-section steel, with a material quality no lower than Q355B. The bottom of each column is fixed to a reinforced concrete independent foundation or strip foundation using pre-embedded anchor bolts to ensure its verticality and overturning resistance. The tops of all columns are fixed to an integral steel frame via high-strength bolts or welding. The installation frame consists of longitudinal main beams and transverse connecting beams, forming a stable spatial truss or solid-web beam structure. Three parallel main slide rails 9 are laid along the length of the upper surface of the installation frame. The center distance between the three main slide rails 9 is strictly consistent with the spacing of the three first sliding shoes at the bottom of the upper load-bearing bracket 3, ensuring that each first sliding shoe accurately straddles its corresponding main slide rail 9.

[0021] The structure of the second straight track 2 is exactly the same as that of the first straight track 1, but its extension direction is different from that of the first track. Angle, where 0° < ≤90°.

[0022] The number of main slide rails 9 is not limited to 3. Depending on the total weight and diameter of the blast furnace, 3 to 5 axes can be arranged. For an 8,000-ton blast furnace, 3 main slide rails 9 are sufficient to meet the stability requirements; for larger tonnage furnaces (such as 15,000-ton furnaces), the number can be increased to 4 or 5 main slide rails 9, and the spacing of the main slide rails 9 can be adjusted accordingly to ensure that all slide shoes bear the load evenly.

[0023] See Figures 4-6 The upper support bracket 3 is a combined support pallet structure, including a bottom steel plate 17, a steel reinforcing mesh 18 welded to the bottom steel plate 17, and a concrete pad 19 poured on top of the steel reinforcing mesh 18. The bottom steel plate 17 is made of 16-25mm thick Q355 series steel plate, preferably 20mm thick Q355B steel plate; the steel reinforcing mesh 18 is made of welded steel sections, with a mesh size of 400-600mm×400-600mm, preferably 500mm×500mm; the concrete pad 19 is made of C30-C35 concrete, with a thickness of 300-700mm, preferably 100mm thick C30 concrete pad 19. The permanent blast furnace foundation 4 is directly and integrally poured on this concrete pad 19, forming an integrated rigid structure.

[0024] Three first sliding shoes are fixed to the bottom of the upper support bracket 3, and the length direction of each first sliding shoe is consistent with the extension direction of the first linear track 1. The first sliding shoes are fixed to the bottom of the upper support bracket 3 by high-strength bolts or welding. The lower surface of each first sliding shoe is machined with a guide groove that matches the first linear track 1, so that the sliding shoe can straddle the first linear track 1 and slide linearly along the first linear track 1, while preventing lateral deviation.

[0025] The lower supporting foundation 6 is a reinforced concrete circular structure, serving as both the lower component of the permanent blast furnace foundation 4 and the main supporting structure for the second linear movement. Three second sliding shoes are fixed to its bottom, their direction aligned with the second section of the linear track 2. Three transition rails 7 are laid on its top surface, their direction aligned with the first section of the linear track 1, and their precise spatial alignment with the end of the first section of the linear track 1 is achieved through adjustable pads. The second sliding shoes are embedded in the bottom concrete of the lower supporting foundation 6 and welded to the internal steel reinforcement frame to ensure the transmission of jacking force during the second movement. The transition rails 7 are fixed to the top surface of the lower supporting foundation 6 using pre-embedded bolts and secondary grouting. Their top surface elevation is consistent with the elevation of the first section of the linear track 1, and their cross-sectional shape and dimensions are identical to those of the first section of the linear track 1, ensuring that the first sliding shoe of the upper supporting bracket 3 can slide smoothly from the first section of the linear track 1 onto the transition rail 7. It should also be noted that during the process of the first jacking device 5 connecting the upper support bracket 3 with the lower support foundation 6, the lower support foundation 6 may shift. Therefore, wing plates can be provided on both sides of the second slipper. The limiting groove formed by the wing plates and the second slipper can limit the shift of the lower support foundation 6 on the second section of the straight track 2. The fixed end of the second jacking device 8 is welded or bolted to the second section of the straight track 2, and the output end is bolted to the lower support foundation 6. In this way, the movement of the lower support foundation 6 along the second section of the straight track 2 can be limited during the connection process of the upper support bracket 3 and the lower support foundation 6, ensuring the stability of the lower support foundation 6 during the connection process.

[0026] Both the first jacking device 5 and the second jacking device 8 can be hydraulically driven or electrically operated. However, when the first jacking device 5's single stroke is insufficient to push the upper support bracket 3 to the designed position, a segmented pushing method can be used. For example, multiple installation positions can be set on the track. When the first push reaches the maximum stroke position, the first jacking device 5 is removed from the first installation position and immediately installed in the second installation position for a second push. This process is repeated until the upper support bracket 3 is pushed to the designed position. The second jacking device 8 can also push the lower support foundation 6 in the same way. To ensure the stability of the first jacking device 5 pushing the upper support bracket 3, a first limiting hole that works with the first jacking device 5 can be provided on the upper support bracket 3. The output end of the first jacking device 5 can be fixed to the inner wall of the first limiting hole by bolts. To ensure the stability of the second jacking device 8 pushing the lower support foundation 6, a second limiting hole that works with the second jacking device 8 can be provided on the lower support foundation 6. The output end of the second jacking device 8 can be fixed to the inner wall of the second limiting hole by bolts.

[0027] As a preferred embodiment, see [link to previous document]. Figure 2 and Figure 3 Both the first pushing device 5 and the second pushing device 8 are engaging pin-type stepping devices. This device includes an engaging reverse thrust support 10, the bottom of which has a U-shaped groove 11 that mates with the main slide rail 9. The gap between the U-shaped groove 11 and the main slide rail 9 is 1-2mm, achieving three-sided engagement (top and two side surfaces) between the engaging reverse thrust support 10 and the main slide rail 9. Through holes are provided on the side of the U-shaped groove 11; connecting holes 12, spaced apart, are provided on the main slide rail 9 to mate with the through holes. The spacing of the connecting holes 12 is 500-1500mm, matching the stroke of the hydraulic cylinder 14. A transverse pin 13 is provided within the through hole, and an anti-disengagement pin is provided at the end of the transverse pin 13 to prevent the pin from disengaging during pushing.

[0028] A hydraulic cylinder 14 is mounted on the snap-fit ​​thrust support 10. Both ends of the hydraulic cylinder 14 are equipped with hinged lugs. The fixed end of the hydraulic cylinder 14 is hinged to the snap-fit ​​thrust support 10; the output end of the hydraulic cylinder 14 is hinged to the guide-type jacking frame 15. The stroke of the hydraulic cylinder 14 is 0.5-1.5m, and the rated thrust is 1500-3000kN, preferably 2000kN with a stroke of 1.8m. The bottom of the guide-type jacking frame 15 is provided with a guide groove 16 that mates with the main slide rail 9. Guide rollers are installed on both sides of the inner cavity of the guide groove 16, and the gap between the guide rollers and the side of the main slide rail 9 is 0.5-1mm. The front end of the guide-type jacking frame 15 is rigidly connected to the upper bearing bracket 3 by high-strength bolts.

[0029] Furthermore, the hole spacing of the connecting hole 12 is 500-1500mm, the gap between the U-shaped slot 11 and the main slide rail 9 is 1-2mm, and the gap between the guide roller and the side of the main slide rail 9 is 0.5-1mm.

[0030] See Figure 3 The upper surface of the main slide rail 9 is provided with a sliding liner 20. The surface of the main slide rail 9 is provided with a carburized and quenched layer with a carburization depth of 2-3mm and a surface hardness ≥HRC55. The sliding liner 20 is a polytetrafluoroethylene sliding plate filled with copper powder, and one is arranged every 0.8-1.2m along the length of the slide rail. The upper and lower surfaces of the sliding liner 20 are uniformly coated with graphite lubricant to form a composite low-friction sliding system.

[0031] During the docking process between the upper support bracket 3 and the lower support foundation 6 by the first jacking device 5, wing plates are provided on both sides of the second sliding shoe to prevent the lower support foundation 6 from shifting. A limiting groove is formed between the wing plates and the second sliding shoe. The limiting groove restricts the lateral shift of the lower support foundation 6 on the second straight track 2. The fixed end of the second jacking device 8 is welded or bolted to the second straight track 2, and the output end is bolted to the lower support foundation 6. This restricts the longitudinal movement of the lower support foundation 6 along the second straight track 2 during the docking process, ensuring the stability of the lower support foundation 6 during the docking process.

[0032] Example

[0033] This embodiment addresses a major overhaul project of a 2000m³ blast furnace in a steel plant. The existing plant building columns are located precisely in the middle of the straight-line relocation path, making single-segment straight-line relocation impossible. Therefore, a non-linear solution combining two straight segments at a 45° angle is adopted. The specific implementation steps are as follows: 1. Parallel prefabrication stage The first section of straight track 1 is constructed in the initial prefabrication area, with three main sliding rails 9. A circular upper support bracket 3 with a diameter of 12m is fabricated, and the permanent blast furnace foundation 4 is poured on it. All prefabrication work, including furnace shell welding, cooling wall installation, and refractory lining, is completed, forming an integrated structure of the upper support bracket 3 and the permanent blast furnace foundation 4, with a total weight of approximately 5000 tons. Three first sliding shoes adapted to the first section of straight track 1 are fixed to the bottom of the upper support bracket 3.

[0034] Simultaneously, the second section of straight track 2 and the 12m diameter lower support foundation 6 are constructed in the transfer docking area. The first section of straight track 1 and the second section of straight track 2 form a 45° angle, creating a non-linear path that bypasses the factory building columns. Three second sliding shoes along the direction of the second section of straight track 2 are pre-installed at the bottom of the lower support foundation 6, and three transition sliding rails 7 aligned with the first section of straight track 1 are laid on the top surface.

[0035] The prefabrication of the permanent blast furnace body foundation 4 and the construction of the transfer foundation were carried out simultaneously, thus saving the overall construction period. The upper support bracket 3 supports the first linear movement, while the lower support foundation 6 is both the lower part of the permanent foundation of the blast furnace body foundation 4 and the main support for the second linear movement. The transition slide rail 7 is set on the top surface of the lower support foundation 6, and its function is to precisely connect with the end of the first section of the linear track 1, so that the upper support bracket 3 can slide smoothly onto the lower support foundation 6. The height difference between the end of the first section of the linear track 1 and the transition slide rail 7 is adjusted to 0.3mm and the gap to 0.8mm by adjusting the adjustable pad. This ensures a smooth transition between the two linear movements and avoids impact and jamming.

[0036] 2. First linear movement

[0037] Three sets of first jacking devices 5 are arranged on the first straight track 1. At a speed of 50 mm / min, the integrated structure of the upper supporting bracket 3 and the permanent blast furnace foundation 4 is pushed linearly along the first straight track 1. The device precisely slides onto the transition rail 7 on the top surface of the lower supporting foundation 6 through a beveled transition surface, ensuring complete alignment of the three first sliding shoes of the upper supporting bracket 3 with the three transition rails 7 of the lower supporting foundation 6. This first linear push is a purely linear motion; the jacking force is parallel to the track and has no lateral component, thus preventing deviation or jamming. The pushing speed is controlled within the range of 40-60 mm / min to ensure both construction efficiency and the stability and controllability of the pushing process. The alignment of the first sliding shoes with the transition rails 7 is a prerequisite for subsequent rigid fixing.

[0038] 3. Rigid integration and reversing during transit

[0039] The inspection confirmed that the three first slippers of the upper support bracket 3 are perfectly aligned with the three transition slide rails 7 of the lower support foundation 6, and the positional accuracy meets the design requirements. The three first slippers at the bottom of the upper support bracket 3 are then fully welded to both ends of the three transition slide rails 7 on the top surface of the lower support foundation 6 for rigid fixation, with each weld being at least 10mm high. C40 micro-expansion concrete is poured to form the joint, and cured for 7 days to reach the design strength. The upper support bracket 3 and the lower support foundation 6 form a permanent rigid whole, with a total weight of approximately 8000 tons, completing the 45° directional conversion.

[0040] The rigid fixing employs full welding, welding the slipper and transition rail 7 together to provide initial mechanical rigidity. Based on this, pouring micro-expansion concrete fills all gaps and generates a micro-expansion effect during hardening, ensuring no gaps or loosening between the upper load-bearing bracket 3 and the lower load-bearing foundation 6, ultimately forming a rigid whole equivalent to a cast-in-place foundation. This dual rigidity integration technology is the core improvement of this invention, distinguishing it from existing simple overlapping-type moving methods. It ensures that the overall structure does not deform or misalign during the second linear moving.

[0041] 4. Second linear movement

[0042] Three sets of second-stage jacking devices 8 are arranged on the second straight track 2, and the integrated permanent blast furnace foundation 4 is pushed linearly along the second straight track 2 to the final installation position at a speed of 40 mm / min. The second linear push is also a pure linear motion, with the direction forming a 45° angle with the first straight track 1. Due to the extremely high overall rigidity of the rigid assembly, the upper supporting bracket 3 and the lower supporting foundation 6 will not experience relative displacement during the push, thus ensuring the positioning accuracy.

[0043] 5. Reset and Fixation Stage

[0044] The three second sliding shoe ends at the bottom of the lower supporting foundation 6 are welded and fixed to the second section of the straight track 2, and then fixed by flow grouting at the furnace bottom. Testing showed that the grout density reached 99.2%, and the final center deviation of the furnace body was 1.2mm, fully meeting the design requirements.

[0045] During the first and second linear advances, a three-level correction control is employed: the first-level passive correction relies on the guide groove 16 and guide rollers at the bottom of the jacking frame to automatically limit the lateral offset to within ±2mm; the lateral offset data is monitored in real time, and when a 2.5mm offset to one side is detected, the second-level active correction is initiated, reducing the speed of the snap-fit ​​reverse thrust support 10 (snap-fit ​​pin stepping jacking device) on the offset side to 30mm / min, while maintaining the speed of the snap-fit ​​reverse thrust support 10 on the other side and in the middle position at 50mm / min, and correcting the offset through differential speed. After about 2 minutes, the offset is corrected to within 1mm; if the offset exceeds 5mm, the overall advance is immediately stopped, and the third-level inching correction is initiated, using a single set of snap-fit ​​reverse thrust supports 10 for precise fine-tuning, advancing 3-5mm each time, until the offset is corrected to within the design allowable range.

[0046] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for non-linear integral moving of a large blast furnace, characterized in that, Includes the following steps: In the parallel prefabrication stage, the first section of straight track (1) is constructed in the initial prefabrication area, and the upper bearing bracket (3) is made on the first section of straight track (1). The prefabrication of the permanent furnace body foundation (4) of the blast furnace is completed on the upper bearing bracket (3). Simultaneously, the second section of straight track (2) and the lower bearing foundation (6) are constructed in the transfer docking area, and the transition slide rail (7) on the top surface of the lower bearing foundation (6) is docked with the end of the first section of straight track (1). The first linear push is initiated by activating the first jacking device (5) on the first section of the linear track (1) to push the upper support bracket (3) in a straight line along the direction of the first section of the linear track (1), so that the first slipper at the bottom of the upper support bracket (3) slides into the transition slide rail (7) on the top surface of the lower support foundation (6) and aligns it. The intermediate rigid integration reversal is achieved by rigidly fixing the first slip shoe at the bottom of the upper bearing bracket (3) to the transition slide rail (7) on the top surface of the lower bearing foundation (6), and pouring concrete to make the upper bearing bracket (3) and the lower bearing foundation (6) form a rigid whole, thus completing the conversion of the pushing direction; The second linear push is initiated by activating the second jacking device (8) on the second section of the linear track (2) to push the rigid whole along with the permanent furnace body foundation (4) of the blast furnace to the final installation position in the direction of the second section of the linear track (2). During the repositioning and fixing stage, grouting is performed at the final installation position to fix the furnace bottom, thus completing the installation of the blast furnace.

2. The method for non-linear integral moving of a large blast furnace according to claim 1, characterized in that, The rigid fixing adopts a full welding method, which welds the first slipper at the bottom of the upper bearing bracket (3) to the head and tail of the transition slide rail (7) on the top surface of the lower bearing foundation (6); the concrete is micro-expansion concrete, which is cured to the design strength after pouring.

3. The method for non-linear integral moving of a large blast furnace according to claim 1, characterized in that, The first straight track segment (1) and the second straight track segment (2) are at an angle... The included angle, 0° < ≤90°.

4. The method for non-linear integral moving of a large blast furnace according to claim 1, characterized in that, The speed of the first linear movement is 40-60 mm / min, and the speed of the second linear movement is 30-50 mm / min. During the parallel prefabrication stage, the height difference and gap at the junction of the end of the first linear track (1) and the transition slide rail (7) are adjusted by an adjustable pad.

5. A large blast furnace non-linear integral moving system, used in the large blast furnace non-linear integral moving method according to any one of claims 1-4, characterized in that, include: A first straight track (1) and a second straight track (2) are provided. The first straight track (1) extends from the initial prefabrication area to the intermediate docking area, and the second straight track (2) extends from the intermediate docking area to the final installation area. The first straight track (1) and the second straight track (2) are positioned at an angle of [missing information]. The included angle, 0° < ≤90°; The upper support bracket (3) is set above the first section of the straight track (1). The upper support bracket (3) is set above the permanent furnace body foundation (4) of the blast furnace, and the bottom is fixed with a first sliding shoe that is compatible with the first section of the straight track (1). The lower support base (6) is set above the second section of the straight track (2), and the bottom is fixed with a second sliding shoe that is compatible with the second section of the straight track (2). The top surface is covered with a transition slide rail (7) that is aligned with the end of the first section of the straight track (1). The first jacking device (5) is set on the first section of the straight track (1) and is used to drive the upper support bracket (3) to move along the first section of the straight track (1); The second jacking device (8) is set on the second section of the straight track (2) and is used to drive the lower supporting foundation (6) to move along the second section of the straight track (2).

6. A large blast furnace non-linear integral moving system according to claim 5, characterized in that, The first straight track (1) and the second straight track (2) each include at least 3 main slide rails (9).

7. A large blast furnace non-linear integral moving system according to claim 6, characterized in that, The first pushing device (5) and the second pushing device (8) are both snap-fit ​​pin stepping devices. The snap-fit ​​pin stepping device includes a snap-fit ​​reverse thrust support (10). The bottom of the snap-fit ​​reverse thrust support (10) is provided with a U-shaped groove (11) that cooperates with the main slide rail (9). The side of the U-shaped groove (11) is provided with a through hole. The main slide rail (9) is provided with connecting holes (12) that cooperate with the through holes at intervals. A transverse pin (13) is provided in the through hole. The end of the transverse pin (13) is provided with an anti-disengagement pin. A hydraulic cylinder (14) is provided on the counter-thrust support (10). Both ends of the hydraulic cylinder (14) are provided with hinged lugs. The fixed end of the hydraulic cylinder (14) is hinged to the counter-thrust support (10). The output end of the hydraulic cylinder (14) is hinged to the guide-type push frame (15). The bottom of the guide-type push frame (15) is provided with a guide groove (16) that cooperates with the main slide rail (9). Guide rollers are installed on both sides of the inner cavity of the guide groove (16). The front end of the guide-type push frame (15) is rigidly connected to the upper bearing bracket (3).

8. A large blast furnace non-linear integral moving system according to claim 7, characterized in that, The hole spacing of the connecting hole (12) is 500-1500mm, the stroke of the hydraulic cylinder (14) is 0.5-1.5m, and the rated thrust is 1500-3000kN; the gap between the U-shaped slot (11) and the main slide rail (9) is 1-2mm; the gap between the guide roller and the side of the main slide rail (9) is 0.5-1mm.

9. A large blast furnace non-linear integral moving system according to claim 6, characterized in that, The upper support bracket (3) includes a bottom steel plate (17), a steel reinforcing mesh (18) welded to the bottom steel plate (17), and a concrete cushion layer (19) poured on top of the steel reinforcing mesh (18). The permanent furnace body foundation (4) of the blast furnace is poured on the concrete cushion layer (19).

10. A large blast furnace non-linear integral moving system according to claim 6, characterized in that, The upper surface of the main slide rail (9) is provided with a sliding liner (20); the surface of the main slide rail (9) is provided with a carburized and quenched layer; the sliding liner (20) is a polytetrafluoroethylene sliding plate filled with copper powder; and the upper and lower surfaces of the sliding liner (20) are provided with graphite lubricant.

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