Hoisting method for main belt vestibule of heavy ultra-large-span blast furnace

Abstract

The invention discloses a hoisting method for a main belt vestibule of a heavy ultra-large-span blast furnace. The hoisting method comprises the following steps: collecting related data of a vestibule body, a hoisting site, surrounding obstacles and the like; performing BIM simulation modeling on the parameters of each part in a computer; selecting a hoisting mode according to the site and the obstacle condition; according to the relevant parameters and the hoisting mode, the selected type of the crane and selection of a sling and a lifting lug are determined; an initial hoisting process is input for simulated hoisting, and the collision condition of a crane main arm and a vestibule body in simulated hoisting and the hoisting data change in the walking process of the crawler crane are checked; s5, correspondingly changing the hoisting parameters or process according to the collision condition as a modified hoisting process and executing S5, and inputting the modified hoisting process into the BIM system to perform hoisting simulation again; and an interference-free hoisting process is used for actual hoisting. The problem that in the large vestibule hoisting process, due to the fact that a large building exists below a vestibule, the vestibule is difficult to place and position can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a method for hoisting a heavy-duty super-large-span blast furnace main belt corridor. Background Art

[0002] In recent years, with the acceleration of the pace of capacity replacement in China's steel industry, the elimination of obsolete equipment has become an important measure for the development of the industry. The obsolete equipment is gradually being eliminated and replaced by more advanced and environmentally friendly blast furnaces. This change also indicates that China's steel industry is moving towards a more efficient, environmentally friendly and sustainable direction. At the same time, steel companies are also facing unprecedented challenges and opportunities. As an important component of the ironmaking process, the main belt corridor in the blast furnace system has been increasing in length, height and weight with the process of capacity upgrading. During the hoisting of large corridors, there are large buildings under the corridors, which makes it difficult to place and position the corridors, and the selection is difficult due to the jamming of the crane rod. The selection of slings and lifting ears for the hoisting of large components are all problems that exist in reality. Summary of the invention

[0003] The present invention provides a method for hoisting a heavy-duty and ultra-large-span blast furnace main belt corridor, which can solve the problems of difficulty in positioning the corridor due to large buildings under the corridor during the hoisting process, difficulty in selection due to crane jamming, and selection of lifting slings and lifting ears for hoisting large components.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for hoisting a heavy-duty super-large-span blast furnace main belt corridor, comprising the following steps:

[0005] S1: Collect relevant data of the corridor, hoisting site, surrounding obstacles, etc., and input the above data into the computer BIM system to perform 3D modeling of the corridor and lifting equipment;

[0006] S2: A preliminary hoisting plan is formulated based on the BIM simulation. After the blower station ground foundation is backfilled, the corridor body is placed in the area between the corridor supports on both sides of the blower station ground foundation. The main crane is set near one of the corridor supports, and the auxiliary crane is set near the other corridor support. The positions of the main crane and auxiliary crane's hoisting points are calculated based on the center of gravity of the corridor and the site conditions.

[0007] S3: Input the initial lifting process to simulate lifting, check the collision between the crane main arm and the corridor body in the simulated lifting, and the changes in lifting data during the crawler crane's movement. If there is a collision, change the lifting parameters or process accordingly according to the collision situation. As the modified lifting process, input the modified lifting process into the BIM system for simulation again. After confirming that there is no interference in the entire lifting process, determine the plan as the final lifting plan and complete the preparation work;

[0008] S4: Perform lifting according to the simulated plan.

[0009] Preferably, the data required for BIM simulation in step S1 include the outer dimensions of the corridor, obstacle-related data at the corridor placement position, the corridor placement angle, the dimensions of the crane placement position after the corridor is placed, and the foundation data of the corridor and the crane placement position.

[0010] Preferably, the hoisting process in step S4 includes the following steps: transporting the corridor body to a predetermined placement position, and assembling it according to a preset placement angle; moving the main crane and the auxiliary crane to the crane station; verifying the corridor placement angle, crane position and lifting radius, and changes in surrounding obstacles before lifting; lifting the corridor by a double-machine crane and moving it to the location along the preset lifting route, and stopping when the height of the corridor from the support seat is not less than 50 cm; then slowly placing the corridor body at the designated position of the corridor support by the main crane and the auxiliary crane; checking the structural deformation of the lifting point position, and loosening the wire rope to complete the hoisting if there is no abnormality.

[0011] Preferably, before placing the corridor body, the corridor placement area should be planned and leveled, the crane walking and hoisting areas should be filled and compacted, the soil should be dug out, loose soil should be removed, thick stones should be used for padding, and then crushed stone should be used for compaction test. After passing the test, preparations for hoisting should be implemented.

[0012] As a preference, before hoisting the corridor body, check the welding quality of the main load-bearing structure near the location where the lifting lugs are set, and conduct non-destructive testing on the main beam connections, diagonal brace connections and lifting lug welding points of the corridor. Hoisting can only be carried out after passing the inspection. During the hoisting of the corridor, due to the use of a double-machine lifting method, always pay attention to the angle change of the wire rope during the crane arm swing process to prevent the Y-axis stress deformation of the wire rope caused by the lateral movement of the corridor. During the hoisting process, control the angle change of the wire rope within 10° in the X-axis direction.

[0013] Preferably, the distance between the hanging point of the main crane and the center point of the corridor body is L1, and the distance between the hanging point of the auxiliary crane and the center point of the corridor body is L2, wherein L1>L2.

[0014] Preferably, when a large building is pre-built under the corridor, only the underground foundation part of the building below the corridor positioning point is constructed, and the corridor is placed nearby after backfilling and leveling.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The component parameters, hoisting site, and surrounding obstacles of the super-large span blast furnace main belt corridor are input into the computer system, and the corridor hoisting process is simulated through BIM. The crane station area, crane boom rotation angle, position of the hoisted component and other factors are comprehensively analyzed. The collision between the crane and the corridor, the jamming and collision between the crane and the corridor and the surrounding obstacles that may occur during the hoisting process are analyzed and processed in advance. The machinery selection is continuously adjusted, the hoisting plan is optimized, and the hidden dangers of safe operation are better eliminated, thereby completing the hoisting operation of the super-large span corridor, ensuring the smooth completion of the hoisting, reducing economic costs, shortening the construction period, and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the construction site layout of the present invention;

[0018] Figure 2 It is the layout diagram of the corridor hanging points of the present invention;

[0019] Figure 3 It is a schematic diagram of the hoisting height of the present invention;

[0020] Figure 4 The present invention uses a lifting lug structure schematic diagram;

[0021] Figure 5 It is a top view schematic diagram of the lifting operation of the present invention.

[0022] Reference numerals:

[0023] 1. Scraping roller, 11. Support plate, 12. Second drive motor, 13. Cleaning scraper, 14. Scraping strip, 15. Support wheel, 16. Bolt hole, 17. Mounting bolt, 18. Connecting block, 2. Support frame, 20. Reserved groove, 21. Laser level, 22. Screw rod, 23. Guide rod, 3. Frame, 4. Push rod, 5. Hydraulic cylinder, 6. Fixed plate, 7. Mounting frame, 8. Scraping plate, 9. First drive motor, 10. Wiping disc. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] like Figure 1-5 As shown, the present invention provides the following technical solutions to solve the problems of difficulty in positioning the corridor due to large buildings under the corridor, difficulty in selecting the type due to the crane rod jamming, and selection of slings and lifting lugs for hoisting large components during the hoisting of the large corridor: a method for hoisting the main belt corridor of a heavy-duty super-large span blast furnace, comprising the following steps:

[0026] S1: Collect relevant data of the corridor body A, hoisting site, surrounding obstacles, etc., input the above data into the computer BIM system to perform 3D modeling of the corridor and lifting equipment, where the data required for BIM simulation include the corridor's external dimensions, the obstacle-related data at the corridor's placement position, the corridor's placement angle, and the dimensions of the crane's placement position after the corridor is placed, and the corridor and crane placement position foundation data. The corridor parameters include the corridor's geometric dimensions, placement angle, corridor weight, and corridor center of gravity;

[0027] For example, the dimensions of the corridor body A are 81m long, 4.8m wide, and 4.7m high, and the elevations of the corridor brackets 3 on the front and rear sides are +23.33m and +36.763m respectively. The weight of the corridor body A is 215t, and the dimensions of the blower station under the corridor body A are 64.5m long, 27m wide, and +23m high.

[0028] S2: A preliminary lifting plan is formulated according to the BIM simulation. After the construction of the ground foundation of the blower station is completed and backfilled, the corridor body A is placed in the area between the corridor supports 3 on both sides of the ground foundation of the blower station. The main crane 1 is set near one of the corridor supports 3, and the auxiliary crane 2 is set near the other corridor support 3. According to the location of the center of gravity of the corridor and the site conditions, the positions of the lifting points of the main crane 1 and the auxiliary crane 2 are calculated. The main crane 1 can be a 500t crawler crane, such as the Zoomlion ZCC5800 crawler crane with a 78m heavy main boom, a 16m super lifting radius working condition, a crawler width of 4.4m, a wheel height of 2.62m, and a heavy main boom width of 3m; the auxiliary crane 2 uses a 600-ton truck crane, such as the Zoomlion ZAT6000H763.133, with a 66.8m main boom working condition;

[0029] Among them, the distance between the lifting point of the main crane 1 and the center point E of the corridor body A is L1, and the distance between the lifting point of the auxiliary crane 2 and the center point E of the corridor body A is L2, wherein L1>L2, which can ensure that the main crane 1 and the auxiliary crane 2 are relatively stable and balanced when lifting the corridor body A, such as L1 is 35.875m, and L2 is 10.25m.

[0030] S3: Input the initial lifting process to simulate lifting, check the collision between the crane main arm and the corridor body A in the simulated lifting, and the changes in lifting data during the crawler crane's movement. If there is a collision, change the lifting parameters or process accordingly according to the collision situation. As the modified lifting process, input the modified lifting process into the BIM system for simulation again. After confirming that there is no interference in the entire lifting process, determine the plan as the final lifting plan and complete the preparation work;

[0031] S4: Perform lifting according to the simulated plan.

[0032] In this embodiment, the hoisting process in step S4 includes the following steps: transporting the corridor body A to a predetermined placement position and assembling it according to a preset placement angle; moving the main crane 1 and the auxiliary crane 2 to the crane station; verifying the corridor placement angle, crane position and lifting radius, and changes in surrounding obstacles before lifting; lifting the corridor by a double crane and moving it to the location along the preset lifting route, and stopping when the height of the corridor from the support seat is not less than 50 cm; then slowly placing the corridor body A at the specified position of the corridor support 3 by the main crane and the auxiliary crane; checking the structural deformation of the lifting point position, and loosening the wire rope to complete the hoisting if there is no abnormality.

[0033] Preferably, before placing the corridor body A, the corridor placement area is first planned and leveled, the crane walking and hoisting areas are replaced and compacted, the soil is dug out, loose soil is removed, thick stones are used for padding, and then crushed stone is used for compaction leveling to conduct a compaction test. After passing the test, preparations for hoisting are implemented.

[0034] Preferably, before hoisting the corridor body A, check the welding quality of the main load-bearing structure near the location where the lifting lug 4 is set, and perform non-destructive testing on the main beam connections, diagonal brace connections and lifting lug welding points of the corridor. Hoisting can be carried out only after passing the inspection. During the hoisting of the corridor, due to the use of a double-machine lifting method, pay attention to the angle change of the wire rope during the crane arm swing process to prevent the Y-axis stress deformation of the wire rope caused by the lateral movement of the corridor. During the hoisting process, control the angle change of the wire rope within 10° in the X-axis direction.

[0035] In the selection of the lifting sling in this embodiment, the length of the wire rope is first confirmed, and the length range of the wire rope is confirmed after comprehensively considering the height difference between the crane lifting position and ±0, the height of the crawler crane wheel, the length of the crawler boom and the maximum lifting height of the hook head, and the height of the corridor itself. Then, the model and length of the wire rope are finally confirmed based on the existing resources and the design load in the plan. The selection of the lifting lug is calculated by using the Pinming safety software. At the same time, it is considered that the lifting lug hole must be larger than the diameter of the shackle locking screw that matches the load, and a surplus of the screw is left to prevent the lifting lug from being subjected to additional force. Figure 3 As shown, when the lifting lug is arranged at the main beam node, the lifting lug should be designed to be the same width as the main beam web, and the three-sided grooves of the lifting lug should be welded to increase the strength of the lifting lug.

[0036] After the positioning of the corridor body A is completed, the first thing to consider when confirming the crawler crane's position is the collision between the main arm and the corridor. When the crawler crane is not perpendicular to the lifting point, the radius used to calculate the collision is the length of the vertical distance from the crawler crane to the corridor rather than the length to the lifting point, and the width of the crawler crane's main arm must be considered. When the main arm collides with the corridor during the lifting process, and the performance of the crawler crane does not meet the increase in the lifting radius, the crawler crane's crawler tracks must be turned toward the corridor's positioning point, and measures related to crawler crane travel must be added to the technical plan. The location of large lifting cranes must also consider the placement of super-lifting counterweights. When confirming the station car position, reserve the position of the counterweight and the truck crane for installing the counterweight, and clear obstacles within the super-lifting rotation radius.

[0037] Preferably, when a large building is pre-built under the corridor, only the underground foundation part of the building below the corridor positioning point is constructed, and the corridor is placed nearby after backfilling and leveling.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A method for hoisting a heavy-duty super-large span blast furnace main belt corridor, characterized in that: The steps include: S1: Collect relevant data of the corridor body (A), hoisting site, surrounding obstacles, etc., and input the above data into the computer BIM system to perform 3D modeling of the corridor and lifting equipment; S2: A preliminary hoisting plan is formulated according to the BIM simulation. After the construction of the blower station ground foundation is completed and backfilled, the corridor body (A) is placed in the area between the corridor supports (3) on both sides of the blower station ground foundation. A main crane (1) is set near one of the corridor supports (3), and an auxiliary crane (2) is set near the other corridor support (3). The positions of the lifting points of the main crane (1) and the auxiliary crane (2) are calculated according to the center of gravity of the corridor and the site conditions. S3: Input the initial lifting process to simulate lifting, check the collision between the crane main arm and the corridor body (A) in the simulated lifting, and the changes in lifting data during the crawler crane's movement. If there is a collision, change the lifting parameters or process accordingly according to the collision situation. Input the modified lifting process into the BIM system for simulation again. After confirming that there is no interference in the entire lifting process, determine that the plan is the final lifting plan and complete the preparation work; S4: Perform lifting according to the simulated plan.

2. The method for hoisting a heavy-duty super-large-span blast furnace main belt corridor according to claim 1 is characterized in that: The data required for BIM simulation in step S1 include the external dimensions of the corridor, data related to obstacles at the corridor placement position, the corridor placement angle, the dimensions of the crane placement position after the corridor is placed, and the foundation data of the corridor and the crane placement position.

3. The method for hoisting a heavy-duty super-large-span blast furnace main belt corridor according to claim 1 is characterized in that: The hoisting process in step S4 includes the following steps: transporting the corridor body (A) to a predetermined placement position and assembling it according to a preset placement angle; moving the main crane (1) and the auxiliary crane (2) to the crane station position; verifying the corridor placement angle, crane position and lifting radius, and changes in surrounding obstacles before lifting; lifting the corridor by a double crane and moving it to the location along the preset lifting route, and stopping when the height of the corridor from the support seat is not less than 50 cm; then slowly placing the corridor body (A) at the designated position of the corridor support (3) by the main crane and the auxiliary crane; checking the structural deformation of the lifting point position, and loosening the wire rope to complete the lifting if there is no abnormality.

4. The method for hoisting a heavy-duty super-large-span blast furnace main belt corridor according to claim 3 is characterized in that: Before placing the corridor body (A), the corridor placement area is first planned and leveled, the crane walking and hoisting areas are replaced and compacted, the soil is dug out, loose soil is removed, thick stones are used for padding, and then crushed stones are used for compaction testing. After passing the test, preparations for hoisting are implemented.

5. The method for hoisting a heavy-duty super-large-span blast furnace main belt corridor according to claim 3 is characterized in that: Before hoisting the corridor body (A), check the welding quality of the main load-bearing structure near the location where the lifting lug (4) is set, and conduct non-destructive testing on the main beam connections, diagonal brace connections and lifting lug welding points of the corridor. The hoisting can only be carried out after passing the inspection; during the hoisting of the corridor, due to the use of a double-machine lifting method, pay attention to the angle change of the wire rope during the crane arm swinging process to prevent the Y-axis stress deformation of the wire rope caused by the lateral movement of the corridor. During the hoisting process, control the angle change of the wire rope in the X-axis direction within 10°.

6. The method for hoisting a heavy-duty super-large-span blast furnace main belt corridor according to claim 1 is characterized in that: The distance between the hanging point of the main crane (1) and the center point (E) of the corridor body (A) is L1, and the distance between the hanging point of the auxiliary crane (2) and the center point (E) of the corridor body (A) is L2, wherein L1>L2.

7. The method for hoisting a heavy-duty super-large-span blast furnace main belt corridor according to claim 1 is characterized in that: When a large building is pre-built under the corridor, only the underground foundation part of the building below the corridor positioning point is constructed, and the corridor is placed nearby after backfilling and leveling.

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