Inverted pushing installation method for large converter

Abstract

The invention relates to an inverted pushing installation method for a large converter. A lower section of a converter shell, a middle section of the converter shell and a backing ring are divided into combined modules, an upper section of the converter shell is divided into a first single module, and a tilting device is divided into a second single module; the assembled combined module is hoisted to a jacking adjusting device composed of a hydraulic portal frame and a sliding rail, the first single module is arranged on a hydraulic module vehicle, and the combined module and the first single module are assembled together through cooperation of the jacking adjusting device and the hydraulic module vehicle to form a converter body; the converter main body is downwards transported to a converter mounting position by the hydraulic module vehicle and is mounted in place; and the second single module is integrally lifted and mounted in place through the hydraulic gantry lifting device. Compared with an existing installation method, the method has the advantages of being high in installation efficiency, low in construction cost, high in installation precision, high in safety and reliability, high in automation degree, high in construction equipment universality and the like.

Description

Technical Field

[0001] The invention relates to the technical field of converter installation, and in particular to an inverted pushing installation method for a large converter. Background Art

[0002] The converter is mainly composed of two parts: the furnace body and the tilting device. The furnace body includes the furnace shell and the support ring, which are connected by a suspension device. The furnace shell of a large converter is generally divided into three parts: the upper section of the furnace shell (conical furnace top section), the middle section of the furnace shell (cylindrical furnace body section) and the lower section of the furnace shell (truncated spherical furnace bottom section).

[0003] The layout of steelmaking processes at home and abroad is roughly the same, and the installation and construction conditions of converters are also basically the same. Large converters are generally manufactured and transported in parts and assembled on site. The process flow is complex, the on-site working conditions are poor, and the lifting is difficult. Generally, they rely on ladle cars in the workshop to support the frame and converter. However, the ladle car can only move along its fixed track, which makes it difficult to adjust the lateral position of the converter during installation. Although the above installation method has the advantage of mature technology, its actual construction is difficult, and the converter installation measures lack universality. In this case, the combined push method of completing the modular assembly of large converters outside the workshop and then pushing the converter into place as a whole has received more and more attention.

[0004] At present, the largest converter installed by the combined push method in China is a 350-ton converter. The existing combined push method generally adopts the method of pushing two ladle cars in parallel (such as the "A modular installation method for a super-large steelmaking converter" disclosed in the Chinese patent application with application publication number CN108676960A). All the parts of the converter are assembled outside the line using a factory crane to form a ladle trolley assembly. A traction device is set in the refining span to pull the ladle trolley assembly. However, the converter assembly slides at a high position on the frame, which poses a high safety risk. In particular, after the tilting device is installed, the center of gravity of the converter is unstable, and it is very easy to deflect during sliding, and it is difficult to adjust, and there is a risk of tipping accidents. At the same time, there are the following problems:

[0005] In terms of equipment selection and integration, the equipment commonly used for overall movement of converters after assembly is mainly jacks and receiving frames, while synchronous jacking devices and hydraulic jacks are mainly used for high-level sliding. The equipment used is relatively simple, and the synchronization adjustment is difficult to control (the jack is generally controlled separately), and the integration is low.

[0006] In terms of converter installation accuracy, the converter is installed by combining a ladle car and a furnace receiving stand. The ladle car can only move along its fixed track. The positioning along the moving direction can be controlled, but it is difficult to adjust along the axis of the converter ear shaft. Generally, secondary positioning adjustment is required, and the secondary adjustment can generally only be done by pushing with a jack.

[0007] In terms of construction efficiency, similar technologies at home and abroad are currently at a technical bottleneck, and there is basically no room for shortening the construction period. The operating efficiency is limited by construction conditions and site conditions, and it is difficult to improve it further.

[0008] In terms of construction costs, there is currently a problem of high installation costs. The manufacturing and installation of the furnace frame requires more than 50 tons of work, and the installation requires a lot of manpower. The manufacturing of temporary construction devices takes a long time.

[0009] In terms of safety and reliability, the center elevation of the converter trunnion is generally about 10 meters, and there are many high-altitude operations and high safety risks. When the combined push method is used, the furnace frame is supported on the support ring and the converter is installed by sliding at a high position. Due to the unbalanced weight caused by the converter tilting device, it is difficult to ensure the sliding synchronization, and there is a risk of tipping. Temporary support measures are usually required, resulting in low construction efficiency and lack of flexibility in safety measures.

[0010] In terms of energy conservation and environmental protection, the cost of making furnace stands or sliding brackets is high, the welding workload is large, and the working environment is poor. The furnace stands and sliding brackets generally cannot be reused, resulting in a waste of resources. Summary of the invention

[0011] The present invention provides an inverted pushing installation method for a large converter, in which a furnace shell middle section, a furnace shell lower section and a support ring are assembled as a combined module, an upper section of the furnace shell is used as a first single module, and the two modules are assembled into a converter body by using a lifting adjustment device and a moving adjustment device. The converter body is transported and installed in position by using a moving adjustment device with a hydraulic module vehicle as the main equipment, and a tilting device is installed as a second single module as a whole. Compared with the existing installation method, the present invention has the advantages of high installation efficiency, low construction cost, high installation accuracy, high safety and reliability, high degree of automation, and strong versatility of construction equipment.

[0012] In order to achieve the above object, the present invention adopts the following technical solutions:

[0013] A method for inverted pushing installation of a large converter, wherein the main body of the converter is divided into modules, wherein the lower section of the furnace shell, the middle section of the furnace shell and the support ring are divided into a combined module, the upper section of the furnace shell is divided into a first single module, and a tilting device is divided into a second single module; the assembled combined module is hoisted onto a lifting and adjusting device composed of a hydraulic gantry and a sliding track, the first single module is placed on a hydraulic module vehicle, and the combined module and the first single module are assembled together to form a converter main body through the cooperation of the lifting and adjusting device and the hydraulic module vehicle; the converter main body is transported to a converter installation position by the hydraulic module vehicle with the furnace mouth facing downward and installed in place; the second single module is lifted and installed in place as a whole by a hydraulic gantry lifting device, and the converter main body is shaken straight by the tilting device, and the converter installation is completed.

[0014] A method for inverting and pushing a large converter for installation, comprising the following steps:

[0015] 1) Module division: the lower section of the converter shell, the middle section of the converter shell and the support ring are used as a combined module, the upper section of the converter shell is used as the first single module, and the tilting device of the converter is used as the second single module;

[0016] 2) Assembly and lifting of combined modules: The combined modules are pre-assembled; the sliding rails and hydraulic gantries are combined into a lifting and adjusting device, the sliding rails are composed of four rails arranged symmetrically in pairs, two of which are arranged at intervals along the same straight line direction to form sliding rail one, and the other two rails are arranged at intervals along the same straight line direction to form sliding rail two, the interval distance between the middle parts of sliding rail one and sliding rail two is greater than the width of the hydraulic module vehicle, and sliding rail one is parallel to sliding rail two; four groups of hydraulic gantries are arranged one by one corresponding to the rails; the tops of the two groups of hydraulic gantries on sliding rail one and the tops of the two groups of hydraulic gantries on sliding rail two are respectively provided with lifting beams, and the two lifting beams are placed on the same horizontal plane by adjusting the hydraulic gantries, and the two lifting beams are connected by longitudinal beams to form a supporting platform; the lower section of the combined module furnace shell is placed upward on the supporting platform, and the four groups of hydraulic gantries are lifted synchronously to lift the combined module to a height higher than the converter installation position;

[0017] 3) Assembling the first single module and the combined module: The mobile adjustment device is composed of a hydraulic module vehicle and a support stand, and the support stand is mounted on the hydraulic module vehicle; the first single module, i.e., the upper section of the furnace shell, is placed on the support stand with the furnace mouth facing downward, and the top surface height of the upper section of the furnace shell is lower than the bottom surface height of the combined module; the upper section of the furnace shell is transported to the bottom of the combined module by the hydraulic module vehicle, and the height, horizontal position and horizontal angle of the upper section of the furnace shell are adjusted to align the upper section of the furnace shell with the middle section of the furnace shell; then, the combined module is moved downward as a whole through the synchronous action of 4 sets of hydraulic gantries, and the upper section of the furnace shell is welded after being aligned with the middle section of the furnace shell to form the main body of the converter;

[0018] 4) Moving and positioning the converter body: The hydraulic rods of the four groups of hydraulic gantries are retracted so that the converter body is completely supported by the moving and adjusting device; the hydraulic module car is started to carry the converter body to the converter installation position, and after moving into position, the height, horizontal position and horizontal angle of the converter body are adjusted, and then the converter body is moved down by the hydraulic module car, and the ear shaft bearing seats on both sides of the support ring are aligned with the bearing seat supports on the corresponding side; after the installation is completed, the moving and adjusting device is withdrawn from the converter installation position;

[0019] 5) Transportation and installation of the tilting device: Before installing the tilting device, first install the distance ring adjustment device, the stop seat and the torsion bar device in place; install the running track on the converter platform, and set a hydraulic gantry lifting device on the running track. Use the hydraulic gantry lifting device to lift the tilting device, transport it along the running track to the side of the bearing seat at the drive end of the converter, install the tilting device, and connect the tilting device with the torsion bar device;

[0020] 6) Install other accessories of the converter, and finally use the tilting device to straighten the assembled converter body to complete the installation process of the converter.

[0021] In the step 2), the assembly of the combined module is carried out in the factory or on site outside the converter installation site; including welding and weld heat treatment of the lower section and the middle section of the furnace shell, alignment of the support ring, installation of the suspension system to connect the support ring with the furnace shell assembly, and installation of the trunnion bearing seats on both sides of the converter, and ensuring that the axes of the two trunnion bearing seats are on the center line of the converter trunnion.

[0022] In the step 3), the support frame is composed of an upper support platform, a lower support platform and a support frame. The upper support platform and the lower support platform are both horizontally arranged and fixedly connected by the support frame.

[0023] In the step 3), the upper section of the furnace shell and the middle section of the furnace shell are assembled and fixed by welding, and the welds are heat treated.

[0024] In the step 5), the converter body is first adjusted after installation, and the tilting device is installed after acceptance.

[0025] In the step 5), the hydraulic gantry lifting device consists of two groups of hydraulic gantries, a lifting beam and a sling; one group of hydraulic gantries is respectively arranged on the two tracks of the running track, the tops of the two groups of hydraulic gantries are connected by a lifting beam, and two groups of slings are arranged on the lifting beam, which cooperate with two lifting rings arranged on the tilting device.

[0026] The computer control system is used to realize centralized control of the hydraulic module vehicle and the hydraulic gantry, as well as real-time monitoring of the converter installation process.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1) The various parts of the converter are reasonably divided, and the assembly of the support ring, the middle section of the furnace shell, the lower section of the furnace shell, the suspension system and other components can be completed before the equipment leaves the factory, and the on-site assembly and welding engineering workload is reduced by about 80%; the main on-site installation tasks are the installation of the combined module and the upper section of the furnace shell, and the transportation and adjustment and installation of the converter body; the lifting of the combined module is achieved by the synchronous action of 4 groups of hydraulic gantries, and the assembled converter body is transported and installed in position by a mobile adjustment device with a hydraulic module car as the main equipment (the hydraulic module car and hydraulic gantry used in the present invention are both mature equipment in the engineering field), and the tilting device is directly installed in place by lifting it through a workshop crane; the tilting device is hoisted as a whole to the side of the converter ear shaft by a hydraulic gantry lifting device for installation, and is connected to the torsion bar device installed in advance.

[0029] 2) In terms of equipment performance, the present invention adopts SPMT (self-propelled hydraulic module transport vehicle, referred to as hydraulic module vehicle) in conjunction with the hydraulic gantry. The four groups of hydraulic gantries have a lifting capacity of more than 1,000 tons, and the hydraulic module vehicle has a sliding force of more than 900 tons. Hydraulic gantries and hydraulic module vehicles with different load capacities can be flexibly selected according to the weight of the converter, which can meet the installation of all current specifications of converters; it is easy to install and has a wide range of applications.

[0030] 3) In terms of equipment selection and integration, the hydraulic module vehicle and hydraulic gantry selected in the present invention can realize synchronous control, and have good stability, timely and accurate signal detection and feedback, and a high degree of visualization; the construction equipment can realize centralized control, with high integration and good synchronization.

[0031] 4) In terms of installation accuracy, the hydraulic module vehicle can move in any direction, automatically adjust the level during travel, ensure smooth and reliable transportation, make it easy to adjust the converter in place, achieve millimeter-level positioning accuracy, and realize three-dimensional spatial position adjustment in the horizontal and height directions.

[0032] 5) In terms of construction efficiency, the present invention adopts reasonable module division, which reduces the welding workload of the on-site group by about 80%, reduces the labor time consumption by about 50%, improves the working conditions, and increases the construction efficiency; due to the use of modular installation technology, the equipment is efficiently adjusted in place and the construction period is shortened by about 20%.

[0033] 6) In terms of construction costs, hydraulic modular vehicles and hydraulic gantries can be leased, in which case the main construction cost is the equipment rental fee; hydraulic modular vehicles and hydraulic gantry can also be purchased self-owned equipment, in which case the main construction costs are the initial investment cost of the equipment, operation and maintenance costs, and depreciation expenses, etc.; and hydraulic modular vehicles and hydraulic gantries have strong versatility and high equipment turnover rate, and can also be leased to others.

[0034] 7) In terms of safety and reliability, the present invention adopts a modular installation method, which reduces the on-site assembly and welding procedures and high-altitude operations. The hydraulic module vehicle transportation has a self-stabilizing function, and the hydraulic gantry can be controlled by a computer. Both can achieve centralized control and process monitoring, and the safety risk is relatively low; the tilting device is directly installed in place to avoid tipping over when sliding with other modules; through the preparation of a reasonable construction plan and the selection of equipment, the installability of the construction process is guaranteed.

[0035] 8) In terms of energy conservation and environmental protection, the power equipment used in the present invention is hydraulically driven and computer controlled, with low energy consumption. The hydraulic module vehicle is used in conjunction with the hydraulic gantry to replace the traditional furnace receiving stand or high-position sliding bracket, reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the combined module of the present invention.

[0037] Figure 2 It is a structural schematic diagram of the first single module (upper section of the furnace shell) of the present invention.

[0038] Figure 3 It is a schematic structural diagram of the second monomer module (tilting device) of the present invention.

[0039] Figure 4 It is a schematic diagram of the combined module of the present invention being placed on a lifting and adjusting device.

[0040] Figure 5 yes Figure 4 Side view of.

[0041] Figure 6 It is a schematic diagram of the lifting of the combined module of the present invention.

[0042] Figure 7 It is a schematic diagram of the movement of the first single module (upper section of the furnace shell) of the present invention.

[0043] Figure 8 It is a schematic diagram of the assembly of the first single module and the combined module of the present invention.

[0044] Fig. 9 It is a schematic diagram of the movement of the converter body described in the present invention.

[0045] Fig.10 It is a schematic diagram of the converter main body of the present invention being lowered and installed in place.

[0046] Fig.11 yes Fig.10 Side view of.

[0047] Fig.12 It is a schematic diagram of the lifting and sliding of the tilting device described in the present invention.

[0048] Fig.13 It is a schematic diagram of the lifting and tilting device of the hydraulic gantry lifting device of the present invention.

[0049] Fig.14 yes Fig.13 Side view of.

[0050] Fig.15 It is a schematic diagram of the installation of the tilting device of the present invention.

[0051] Fig.16 It is a schematic diagram of the converter of the present invention after installation is completed and aligned.

[0052] In the figure: Ⅰ. Combined module 1-1. Lower section of furnace shell 1-2. Middle section of furnace shell 1-3. Upper section of furnace shell 2. Support ring 3. Suspension system 3-1. Horizontal suspension system 3-2. Vertical suspension system 4. Trunnion bearing seat 5. Tilting device 6. Hydraulic gantry 7. Sliding track 8. Lifting beam 9. Hydraulic module vehicle 10. Support stand 11-1. Drive end bearing seat support 11-2. Floating end bearing seat support 12. Converter foundation 13. Torsion bar device 14. Stop seat 15. Traveling track 16. Hydraulic gantry lifting device 16-1. Hydraulic gantry 16-2. Lifting beam 16-3. Lifting device DETAILED DESCRIPTION

[0053] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0054] like Figure 1-Figure 16 As shown, the inverted push installation method of a large converter described in the present invention divides the main body of the converter into modules, wherein the furnace shell lower section 1-1, the furnace shell middle section 1-2 and the support ring 2 are divided into a combination module I (such as Figure 1 As shown), the upper section 1-3 of the furnace shell is divided into a first single module (as shown Figure 2 As shown), the tilting device 5 is divided into a second single module (as shown Figure 3 As shown); the assembled combination module I is hoisted onto the lifting and adjusting device composed of the hydraulic gantry 6 and the sliding track 7, the first single module is placed on the hydraulic module vehicle 9, and the combination module I and the first single module are assembled together to form the converter body through the lifting and adjusting device and the hydraulic module vehicle 9; the converter body is transported to the converter installation position by the hydraulic module vehicle 9 with the furnace mouth facing downward and installed in place; the second single module is lifted and installed in place as a whole by the hydraulic gantry lifting device 16, and the converter body is shaken straight by the tilting device 5, and the converter installation is completed.

[0055] The inverted push installation method of a large converter described in the present invention specifically comprises the following steps:

[0056] 1) Module division: the lower section 1-1, the middle section 1-2 and the support ring 2 of the converter shell are used as the combined module I, the upper section 1-3 of the converter shell is used as the first single module, and the tilting device 5 of the converter is used as the second single module;

[0057] 2) Assembly and lifting of combined modules: Figure 4 , Figure 5 As shown, the combined module I is pre-assembled; the sliding rail 7 and the hydraulic gantry 6 form a jacking adjustment device, the sliding rail 7 is composed of 4 rails arranged symmetrically in pairs, 2 of which are arranged at intervals along the same straight line direction to form sliding rail 1, and the other 2 rails are arranged at intervals along the same straight line direction to form sliding rail 2, the interval distance between the middle parts of sliding rail 1 and sliding rail 2 is greater than the width of the hydraulic module vehicle 9, and sliding rail 1 is parallel to sliding rail 2; 4 groups of hydraulic gantries 6 are arranged one by one with the rails; the tops of the 2 groups of hydraulic gantries 6 on sliding rail 1 and the tops of the 2 groups of hydraulic gantries 6 on sliding rail 2 are respectively provided with lifting beams 8, and the 2 lifting beams 8 are placed on the same horizontal plane by adjusting the hydraulic gantry 6, and the 2 lifting beams 8 are connected by longitudinal beams to form a supporting platform; as shown Figure 6 As shown, the lower section of the furnace shell of the combined module I is placed upward on the support platform, and the four groups of hydraulic gantries 6 are lifted synchronously to lift the combined module I to a height higher than the installation position of the converter;

[0058] 3) The first single module is assembled with the combined module: Figure 7 As shown, the movable adjustment device is composed of a hydraulic module vehicle 9 and a support stand 10, and the support stand 10 is arranged on the hydraulic module vehicle 9; the first single module, that is, the upper section 1-3 of the furnace shell is placed on the support stand 10 with the furnace mouth facing downward, and the top surface height of the upper section 1-3 of the furnace shell is lower than the bottom surface height of the combined module I; Figure 8 As shown, the upper section 1-3 of the furnace shell is transported to the bottom of the combined module I by using the hydraulic module vehicle 9, and the height, horizontal position and horizontal angle of the upper section 1-3 of the furnace shell are adjusted to align the upper section 1-3 of the furnace shell with the middle section 1-2 of the furnace shell; then the combined module I is moved downward as a whole by synchronizing the four groups of hydraulic gantries 6, and the upper section 1-3 of the furnace shell is aligned with the middle section 1-2 of the furnace shell and then welded to form the converter body;

[0059] 4) Movement and positioning of the converter body: The hydraulic rods of the four hydraulic gantries 6 are retracted so that the converter body is completely supported by the mobile adjustment device (such as Fig. 9 As shown); start the hydraulic module car 9 to carry the converter body to the converter installation position, and after moving to the position, adjust the height, horizontal position and horizontal angle of the converter body, and then move the converter body downward through the hydraulic module car 9 (as shown); Fig.10 , Fig.11As shown in the figure), align the trunnion bearing seats 4 on both sides of the support ring 2 with the bearing seat supports on the corresponding sides; after the installation is completed, move the adjustment device out of the converter installation position;

[0060] 5) Transportation and installation of the tilting device: Before installing the tilting device 5, first install the distance ring adjustment device, the stop seat 14 and the torsion bar device 13 in place; Fig.12 As shown, a running track 15 is installed on the converter platform, and a hydraulic gantry lifting device 16 is provided on the running track 15. The tilting device 5 is lifted by the hydraulic gantry lifting device 16 and transported along the running track 15 to the side of the bearing seat at the drive end of the converter, and the tilting device 5 is installed and connected to the torsion bar device 13 (as shown in FIG. Fig.15 shown);

[0061] 6) Install other accessories of the converter, and finally use the tilting device 5 to shake the assembled converter body straight (such as Fig.16 The installation process of the converter is completed.

[0062] In the step 2), the assembly of the combined module I is carried out in the factory or on site outside the converter installation site; including the welding and weld heat treatment of the furnace shell lower section 1-1 and the furnace shell middle section 1-2, the alignment of the support ring 2, the installation of the suspension system 3 (including the horizontal suspension system 3-1 and the vertical suspension system 3-2) to connect the support ring 2 with the furnace shell assembly, and the installation of the ear shaft bearing seats 4 on both sides of the converter, and ensuring that the axes of the two ear shaft bearing seats 4 are on the center line of the converter ear shaft.

[0063] In the step 3), the support platform 10 is composed of an upper support platform, a lower support platform and a support frame. The upper support platform and the lower support platform are both horizontally arranged and fixedly connected by the support frame.

[0064] In the step 3), the upper section 1-3 of the furnace shell and the middle section 1-2 of the furnace shell are assembled and fixed by welding, and the weld is heat treated.

[0065] In the step 5), the converter body is first adjusted after installation, and the tilting device 5 is installed after acceptance.

[0066] In the step 5), if Fig.13 , Fig.14 As shown, the hydraulic gantry lifting device 16 consists of two groups of hydraulic gantries 16-1, a lifting beam 16-2 and a lifting device 16-3; one group of hydraulic gantries 16-1 is respectively arranged on the two tracks of the running track 15, and the tops of the two groups of hydraulic gantries 16-1 are connected by a lifting beam 16-2, and two groups of lifting devices 16-3 are arranged on the lifting beam 16-2, which cooperate with two lifting rings arranged on the tilting device 5.

[0067] The computer control system is used to realize centralized control of the hydraulic module vehicle 9 and the hydraulic gantries 6 and 16 - 1 , as well as real-time monitoring of the converter installation process.

[0068] The inverted push installation method of a large converter described in the present invention mainly solves the following problems:

[0069] 1) Reduce the welding workload during on-site assembly and improve the efficiency of converter installation.

[0070] 2) A sliding jacking system consisting of a hydraulic module vehicle 9 and a hydraulic gantry 6 as the main equipment is adopted to replace the traditional installation method based on a push furnace stand (which needs to be made on site), thereby reducing construction measures fees and engineering costs.

[0071] 3) Adopt unique module division method and modular installation to improve converter installation accuracy.

[0072] The key steps and precautions of the inverted push installation method of a large converter described in the present invention are as follows:

[0073] 1. Module division: According to the structure and function of the converter, it is divided into three modules: combined module I (including support ring 2, furnace shell middle section 1-2 and furnace shell lower section 1-1), first single module (furnace shell upper section 1-3), and second single module (tilting device 5). Each module can be independently manufactured and accepted in the factory or pre-assembly site.

[0074] 2. Module transportation: After the modules are manufactured in the factory, they are transported to the construction site by appropriate means of transportation. Protective measures need to be taken during transportation to ensure the safety of transportation and the integrity of the module structure.

[0075] 3. Module installation, including the following process:

[0076] Construction preparation: Assembly of combined module I, including support ring 2, furnace shell middle section 1-2, furnace shell lower section 1-1, suspension system 3 and trunnion bearing seat 4, etc. Select the model of hydraulic gantry 6 and hydraulic module vehicle 9 according to the overall weight of the assembled combined module I, and preferably set 4 sets of hydraulic gantry 6 on the sliding track 7.

[0077] Combination module hoisting: After assembly, combination module I is in an inverted state. The combination module I is hoisted by a workshop crane. After the trial hoisting is qualified, the combination module I is hoisted as a whole and placed on the support platform composed of two sets of lifting beams 8 and longitudinal beams on the top of the four sets of hydraulic gantries 6. The position of the hydraulic gantries 6 can be adjusted by moving along the corresponding track.

[0078] Adjustment and lifting: After the combination module I is placed on the supporting platform, the combination module I is adjusted to a horizontal state as a whole using four sets of hydraulic gantries 6, and then the four sets of hydraulic gantries 6 act synchronously to lift the combination module I to a height higher than the converter installation position.

[0079] Assembly of the converter body: The upper section 1-3 of the furnace shell is transported to the bottom of the lifted combined module I by using the hydraulic module car 9. The middle parts of the two sets of sliding rails 7 are disconnected structures, which facilitates the hydraulic module car 9 to enter and exit the space below the combined module I. After the upper section 1-3 of the furnace shell arrives below the combined module I, the position and angle are adjusted by the adjustment function of the hydraulic module car 9. After alignment, the four sets of hydraulic gantries 6 move synchronously to move the combined module I downward, so as to realize the alignment assembly of the upper section 1-3 of the furnace shell and the middle section 1-2 of the furnace shell;

[0080] Moving and installing the converter body: After the converter body is assembled, it is transported as a whole by the hydraulic module car 9; the overall height of the converter body is maintained by the support stand 10. After reaching the converter installation position, the adjustment function of the hydraulic module car 9 is also used to adjust the height (fine-tuning), position and angle of the converter body to make it consistent with the theoretical installation position of the converter.

[0081] The converter operating platform can be divided into pit type and elevated type; the pit type is to arrange the converter on the ground, and the ladle is placed in the pit to tap the steel. Due to its poor working conditions, long inventory time and low converter operation rate, it is basically eliminated at present; while the elevated type is to build an elevated operating platform around the converter, the elevated operating platform serves as the converter foundation 12, and the ladle and slag pot are placed on the flat car on the ground. At present, all new converters adopt the elevated layout. The height of the converter body supported by the support stand 10 on the hydraulic module car 9 is higher than the theoretical installation height. When it is transported to the top of the converter installation position by the hydraulic module car 9, it is lowered into place after precise position adjustment by the hydraulic module car 9, and the ear shaft bearing seats 4 on both sides of the converter body are connected and fixed with the corresponding bearing seat supports (including the driving end bearing seat support 11-1 and the floating end bearing seat support 11-2).

[0082] Install the tilting device: After the installation of the converter body is completed and adjusted and accepted, install the tilting device 5; first install the distance ring adjustment device, the stop seat 14 and the torsion bar device 13 in place, then use the hydraulic gantry lifting device 16 to lift the tilting device 5, and transport it along the running track 15 to the side of the converter drive end bearing seat for installation, and connect the tilting device 5 to the torsion bar device 13.

[0083] Accessory installation: install other accessories of the converter, and finally straighten the converter through the tilting device 5 to complete the installation of the converter.

[0084] The hydraulic module vehicle of the present invention can be a self-propelled hydraulic module transport vehicle produced by MAMMOET (Mammoet) Company, and the hydraulic gantry can be a hydraulic gantry produced by MAMMOET (Mammoet) Company.

[0085] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for inverting and pushing a large converter, characterized in that: The main body of the converter is divided into modules, wherein the lower section of the furnace shell, the middle section of the furnace shell and the support ring are divided into combined modules, the upper section of the furnace shell is divided into a first single module, and the tilting device is divided into a second single module; the assembled combined modules are hoisted onto a lifting and adjusting device composed of a hydraulic gantry and a sliding track, the first single module is placed on a hydraulic module vehicle, and the combined module and the first single module are assembled together to form a converter main body through the cooperation of the lifting and adjusting device and the hydraulic module vehicle; the converter main body is transported to the converter installation position by the hydraulic module vehicle with the furnace mouth facing downward and installed in place; the second single module is lifted and installed in place as a whole by the hydraulic gantry lifting device, and the converter main body is straightened by the tilting device to complete the installation of the converter.

2. A large converter inverted push installation method according to claim 1, characterized in that: The specific steps include: 1) Module division: the lower section of the converter shell, the middle section of the converter shell and the support ring are used as a combined module, the upper section of the converter shell is used as the first single module, and the tilting device of the converter is used as the second single module; 2) Assembly and lifting of combined modules: The combined modules are pre-assembled; the sliding rails and hydraulic gantries are combined into a lifting and adjusting device, the sliding rails are composed of four rails arranged symmetrically in pairs, two of which are arranged at intervals along the same straight line direction to form sliding rail one, and the other two rails are arranged at intervals along the same straight line direction to form sliding rail two, the interval distance between the middle parts of sliding rail one and sliding rail two is greater than the width of the hydraulic module vehicle, and sliding rail one is parallel to sliding rail two; four groups of hydraulic gantries are arranged one by one corresponding to the rails; the tops of the two groups of hydraulic gantries on sliding rail one and the tops of the two groups of hydraulic gantries on sliding rail two are respectively provided with lifting beams, and the two lifting beams are placed on the same horizontal plane by adjusting the hydraulic gantries, and the two lifting beams are connected by longitudinal beams to form a supporting platform; the lower section of the combined module furnace shell is placed upward on the supporting platform, and the four groups of hydraulic gantries are lifted synchronously to lift the combined module to a height higher than the converter installation position; 3) Assembling the first single module and the combined module: The mobile adjustment device is composed of a hydraulic module vehicle and a support stand, and the support stand is mounted on the hydraulic module vehicle; the first single module, i.e., the upper section of the furnace shell, is placed on the support stand with the furnace mouth facing downward, and the top surface height of the upper section of the furnace shell is lower than the bottom surface height of the combined module; the upper section of the furnace shell is transported to the bottom of the combined module by the hydraulic module vehicle, and the height, horizontal position and horizontal angle of the upper section of the furnace shell are adjusted to align the upper section of the furnace shell with the middle section of the furnace shell; then, the combined module is moved downward as a whole through the synchronous action of 4 sets of hydraulic gantries, and the upper section of the furnace shell is welded after being aligned with the middle section of the furnace shell to form the main body of the converter; 4) Moving and positioning the converter body: The hydraulic rods of the four groups of hydraulic gantries are retracted so that the converter body is completely supported by the moving and adjusting device; the hydraulic module car is started to carry the converter body to the converter installation position, and after moving into position, the height, horizontal position and horizontal angle of the converter body are adjusted, and then the converter body is moved down by the hydraulic module car, and the ear shaft bearing seats on both sides of the support ring are aligned with the bearing seat supports on the corresponding side; after the installation is completed, the moving and adjusting device is withdrawn from the converter installation position; 5) Transportation and installation of the tilting device: Before installing the tilting device, first install the distance ring adjustment device, the stop seat and the torsion bar device in place; install the running track on the converter platform, and set a hydraulic gantry lifting device on the running track. Use the hydraulic gantry lifting device to lift the tilting device, transport it along the running track to the side of the bearing seat at the drive end of the converter, install the tilting device, and connect the tilting device with the torsion bar device; 6) Install other accessories of the converter, and finally use the tilting device to straighten the assembled converter body to complete the installation process of the converter.

3. A large converter inverted push installation method according to claim 2, characterized in that: In the step 2), the assembly of the combined module is carried out in the factory or on site outside the converter installation site; including welding and weld heat treatment of the lower section and the middle section of the furnace shell, alignment of the support ring, installation of the suspension system to connect the support ring with the furnace shell assembly, and installation of the trunnion bearing seats on both sides of the converter, and ensuring that the axes of the two trunnion bearing seats are on the center line of the converter trunnion.

4. The method for inverted displacement installation of a large converter according to claim 2, characterized in that: In the step 3), the support frame is composed of an upper support platform, a lower support platform and a support frame. The upper support platform and the lower support platform are both horizontally arranged and fixedly connected by the support frame.

5. The method for inverted displacement installation of a large converter according to claim 2, characterized in that: In the step 3), the upper section of the furnace shell and the middle section of the furnace shell are assembled and fixed by welding, and the welds are heat treated.

6. The method for inverted displacement installation of a large converter according to claim 2, characterized in that: In the step 5), the converter body is adjusted after installation, and the tilting device is installed after acceptance.

7. The method for inverted displacement installation of a large converter according to claim 2, characterized in that: In the step 5), the hydraulic gantry lifting device consists of two groups of hydraulic gantries, a lifting beam and a sling; one group of hydraulic gantries is respectively arranged on the two tracks of the running track, the tops of the two groups of hydraulic gantries are connected by a lifting beam, and two groups of slings are arranged on the lifting beam, which cooperate with two lifting rings arranged on the tilting device.

8. A large converter inverted push installation method according to claim 1 or 2, characterized in that: The computer control system is used to realize centralized control of the hydraulic module vehicle and the hydraulic gantry, as well as real-time monitoring of the converter installation process.

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