Inverted construction method of aluminum oxide bin

Abstract

The invention relates to the technical field of round bin building construction, in particular to an aluminum oxide bin upside-down construction method. S1, measuring and positioning the top surface of the completed foundation; and S2, the annular bottom plate is installed and fixed to the top face of the foundation. And S3, a center cylinder temporary fixing support is arranged on the top face of the foundation. And S4, the first circle of wall plates are assembled and fixed. And S5, assembling of the silo top structure is completed. And S6, a plurality of hydraulic jacking devices are evenly distributed around the inner circumference of the foundation. And S7, the hydraulic jacking device is operated to synchronously jack the first circle of wall plate. And S8, the next circle of wall plates are assembled and welded in the new assembling space. And S9, the hydraulic jacking device is operated to enable the supporting block to descend to the bottom, and a bracket is welded to the lower portion of the next circle of wall plate. And S10, the steps of jacking, assembly welding, supporting block descending and bracket welding are repeated. According to the construction method, the construction sequence of firstly assembling the warehouse top, then jacking the warehouse top circle by circle and inversely installing the wall plates is adopted, so that the safety risk caused by erecting a high-altitude scaffold in a traditional forward installation method is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of cylindrical silo construction technology, specifically a method for inverting an alumina silo during construction. Background Technology

[0002] As an important industrial raw material, alumina storage facilities are increasingly being built on a large scale. Large flat-bottomed, conical-top alumina silos are widely used in related industrial fields due to their large capacity and structural stability. These silo structures typically have huge diameters (up to 30 meters or more) and are quite tall, making their installation a typical example of heavy lifting operations.

[0003] Traditional alumina silo installations often employ either the direct installation method or a large crane for overall hoisting. The direct installation method requires extensive scaffolding for high-altitude work, with workers assembling and welding panels at height, resulting in low efficiency and significant safety risks. While using ultra-large crawler cranes for overall hoisting reduces high-altitude work, it places extremely high demands on the site's foundation bearing capacity, and the rental cost of large hoisting equipment is prohibitively expensive, making it uneconomical, especially in projects with limited space or where multiple silos are constructed sequentially. For large, thin-walled cylindrical silo structures, finding a more efficient and economical installation method while ensuring safety and quality is a pressing engineering challenge in this field. Summary of the Invention

[0004] The present invention aims to solve the above problems and thus provide an efficient method for the inverted construction of alumina silos.

[0005] The technical solution adopted by the present invention to solve the aforementioned problem is as follows: A method for inverting an alumina silo during construction, characterized by the following steps: S1: Take measurements and determine the installation position of the annular base plate by measuring and positioning the top surface of the completed foundation.

[0006] S2: Install and secure the annular base plate to the top surface of the foundation.

[0007] S3: Set a temporary fixed support for the central tube on the top surface of the foundation, install the central tube and correct its verticality and elevation.

[0008] S4: Install multiple wall panel assembly supports evenly on the annular base plate, and assemble and fix the first ring of wall panels on the assembly supports.

[0009] S5: Weld brackets to the lower part of the first ring wall panel, and hoist the prefabricated silo roof truss between the first ring wall panel and the central tube. Fix one end of the silo roof truss to the central tube and the other end to the top of the first ring wall panel to complete the assembly of the silo roof structure.

[0010] S6: Multiple hydraulic jacking devices are evenly distributed around the inner circumference of the foundation, and each hydraulic jacking device is equipped with a support block for jacking the bracket.

[0011] S7: Operate the hydraulic jacking device to simultaneously lift the first ring of wall panels, creating a new assembly space below.

[0012] S8: In the new assembly space, assemble and weld the next ring of wall panels, and assemble and weld it with the already lifted wall panels.

[0013] S9: Operate the hydraulic jacking device to lower its support block to the bottom, and weld the bracket to the lower part of the next ring of wall panels.

[0014] S10: Repeat the steps of lifting, assembling and welding, lowering the support blocks and welding the brackets, and assemble the remaining wall panels from bottom to top, ring by ring, until the entire alumina silo is installed.

[0015] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: This invention, by adopting a construction sequence of "assembling the silo top first, then lifting and inverting the wall panels," transforms a large amount of high-altitude work into ground-level or low-altitude work, effectively avoiding the safety risks associated with traditional high-altitude scaffolding erection methods. Simultaneously, this method utilizes a hydraulic lifting system distributed around the silo's circumference as the lifting power, avoiding the use of ultra-large cranes for overall lifting, reducing the stringent requirements on the load-bearing capacity of the construction site and the high equipment costs. This provides a more feasible and economical solution for scenarios involving confined spaces or the sequential construction of multiple silos. The entire construction process is logically clear, with each step interconnected, helping to ensure the stability and quality of the installation of large, thin-walled silos.

[0016] As a preferred embodiment, a further technical solution of the present invention is: Furthermore, the measurement and positioning steps include: setting up the measuring instrument at the center of the foundation, taking points and marking them at preset angle intervals on the edge of the foundation to determine the installation outline of the annular base plate. This method can perform radial positioning based on the center point, which helps to ensure the accuracy of the installation position of the annular base plate and lays a good foundation for subsequent verticality control of the wall panels and roundness of the silo.

[0017] Furthermore, the steps for installing and fixing the annular base plate include: first, spot welding the pad to a preset position on the bottom of the base plate, then hoisting the base plate into place, adjusting its flatness, fixing it, and then welding and performing non-destructive testing on the butt welds of the base plate. By pre-setting the pad and adjusting its flatness, the base plate can be accurately positioned and fixed, ensuring the horizontality of the installation reference surface; the subsequent welding and non-destructive testing of the welds help to ensure the structural integrity and reliability of the annular base plate as the overall foundation.

[0018] Furthermore, the hydraulic jacking device is controlled by a central control system to achieve synchronous operation of multiple jacking points. The introduction of the central control system enables unified coordination and management of multiple distributed jacking devices, striving to improve the synchronicity of the process. This is of positive significance for maintaining the overall stability of large warehouses during the jacking process and preventing structural deformation.

[0019] Furthermore, the hydraulic jacking device includes a release-lock jack, a lifting frame, and a lifting rod. The lifting frame is fixedly installed on the top surface of the foundation. The release-lock jack is a hollow shaft step hydraulic jack and is fixedly installed on the top of the lifting frame. The cylinder of the release-lock jack has a through hole in the center for the lifting rod to pass through. The lifting rod is a solid steel rod that vertically passes through the through hole of the release-lock jack. The bottom end of the lifting rod has a support block for supporting the bracket. The release-lock jack drives the lifting rod to make a step-by-step upward movement by alternately locking the upper and lower locking heads of the lifting rod. The structure of this device utilizes the self-locking characteristics of the locking mechanism to provide safety during jacking intervals or when the system loses pressure, preventing the silo from sliding down unexpectedly. Its step-by-step working mode also facilitates more precise control of the jacking height.

[0020] Furthermore, connecting frames are installed between the top and bottom of adjacent lifting frames to form a stable overall system, which enhances the stability of the hoist.

[0021] Furthermore, the S7 controls the release and release of the jack, causing the upper jack to engage the lifting rod, the lower jack to release, the piston rod to extend and move the lifting rod upward, and the support block to rise synchronously with the lifting rod to lift the bracket, thereby raising the chamber. Subsequently, the lower jack engages the lifting rod to bear the load, the upper jack releases, and the piston rod retracts to reset, repeating this cycle until the chamber is lifted to the predetermined height. This working cycle makes the lifting process smooth and controllable. After each stroke, the lower jack bears the load, improving operational safety. The cycle continues until the predetermined height is reached, reserving operating space for the assembly of the lower wall panels. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the hydraulic lifting device according to an embodiment of the present invention; The following are labeled in the diagram: wall panel 1, bracket 2, jack 3, lifting frame 4, lifting rod 5. Detailed Implementation

[0023] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0024] A method for inverting an alumina silo during construction, characterized by the following steps: S1: Take measurements and determine the installation position of the annular base plate by measuring and positioning the top surface of the completed foundation.

[0025] S2: Install and secure the annular base plate to the top surface of the foundation.

[0026] S3: Set a temporary fixed support for the central tube on the top surface of the foundation, install the central tube and correct its verticality and elevation. The verticality deviation should be controlled to be no more than 0.1% of the height of the central tube.

[0027] S4: Multiple assembly supports for wall panels 1 are evenly distributed on the annular base plate. The assembly supports can be made of welded H-beams, evenly distributed on the annular base plate and spot-welded firmly to the base plate. The first ring of wall panels 1 is then assembled and fixed on the assembly supports.

[0028] S5: Weld brackets 2 to the lower part of the first ring wall panel 1, and hoist the prefabricated silo roof truss between the first ring wall panel 1 and the central tube. During hoisting, guide ropes should be set on both sides of the truss to prevent swaying. After positioning, temporarily fix it. After correcting the verticality, fix one end of the silo roof truss to the central tube and the other end to the top of the first ring wall panel 1 to complete the assembly of the silo roof structure.

[0029] S6: Multiple hydraulic jacking devices are evenly distributed around the inner circumference of the foundation, and each hydraulic jacking device is equipped with a support block for jacking the bracket 2.

[0030] S7: Operate the hydraulic jacking device to simultaneously lift the first ring of wall panels 1, so that a new assembly space is formed below.

[0031] S8: In the new assembly space, assemble and weld the next ring of wall panels 1, and assemble and weld it with the already lifted wall panels 1.

[0032] S9: Operate the hydraulic lifting device to lower its support block to the bottom, and weld the bracket 2 to the lower part of the next ring wall panel 1.

[0033] S10: Repeat the two steps of lifting, assembling and welding, lowering the support block and welding the bracket, assembling the remaining wall panels 1 ring by ring from bottom to top until the entire alumina silo body is installed. For the last ring of wall panels 1 (bottom wall panel 1), when welding the fillet weld between it and the annular bottom plate, multiple welders should be evenly distributed and weld in sections along the same direction to control welding deformation.

[0034] Furthermore, the measurement and positioning steps include: setting up the measuring instrument at the center of the foundation, taking and marking points at the edge of the foundation at preset angle intervals, taking points every 20° according to the axis of the drawing, and marking the points with red paint on the edge of the foundation to determine the installation outline of the annular base plate. This method can perform radial positioning based on the center point, which helps to ensure the accuracy of the installation position of the annular base plate and lays a good foundation for the subsequent verticality control of wall panel 1 and the roundness of the silo.

[0035] Furthermore, the steps for installing and fixing the annular base plate include: first, spot welding the pad to a preset position on the bottom of the base plate, then hoisting the base plate into place, adjusting its flatness, fixing it, and then welding and performing non-destructive testing on the butt welds of the base plate. By pre-setting the pad and adjusting its flatness, the base plate can be accurately positioned and fixed, ensuring the horizontality of the installation reference surface; the subsequent welding and non-destructive testing of the welds help to ensure the structural integrity and reliability of the annular base plate as the overall foundation.

[0036] Furthermore, the hydraulic jacking device is controlled by a central control system, such as the YB60 hydraulic pump station and control cabinet, to achieve synchronous operation of multiple jacking points. The introduction of the central control system enables unified coordination and management of multiple distributed jacking devices, striving to improve the synchronicity of the process. This is of positive significance for maintaining the overall stability of large warehouses during the jacking process and preventing structural deformation.

[0037] Furthermore, the hydraulic jacking device includes a release jack 3, a lifting frame 4, and a lifting rod 5, and uses 32 release jacks 3 (such as the SQD-350-100s.f type) with a rated lifting capacity of 35 tons as the actuator. The lifting rod 5 can be made of Ф32 45# round steel, and the lifting frame 4 is fixedly installed on the top surface of the foundation. The release-type jack 3 is a hollow shaft step hydraulic jack 3 and is fixedly installed on the top of the lifting frame 4. The cylinder of the release-type jack 3 has a through hole for the lifting rod 5 to pass through. The lifting rod 5 is a solid steel rod that vertically passes through the through hole of the release-type jack 3. The bottom end of the lifting rod 5 has a support block for supporting the bracket 2. The release-type jack 3 drives the lifting rod 5 to make a step-by-step upward movement by alternately clamping the upper and lower clamps of the lifting rod 5. The structure of this device utilizes the self-locking characteristics of the clamping mechanism to provide safety protection during lifting intervals or when the system loses pressure, preventing the chamber from sliding down unexpectedly. Its step-by-step working mode is also conducive to more precise control of the lifting height.

[0038] Furthermore, a connecting frame is provided between the top and bottom of the adjacent lifting frames 4 to form a stable overall system, which enhances the stability of the lifting machine.

[0039] Furthermore, in S7, the control mechanism of the release-lock jack 3 causes its upper jack to lock onto the lifting rod 5, while the lower jack releases, allowing the piston rod to extend and move the lifting rod 5 upwards. The support block rises synchronously with the lifting rod 5 to lift the bracket 2, thereby raising the chamber. Subsequently, the lower jack locks onto the lifting rod 5 to bear the load, the upper jack releases, and the piston rod retracts to reset. This cycle is repeated until the chamber is lifted to the predetermined height. This working cycle ensures a smooth and controllable lifting process. After each stroke, the lower jack bears the load, improving operational safety. The cycle continues until the predetermined height is reached, providing operating space for the assembly of the lower wall panel 1.

[0040] This invention, by adopting a construction sequence of "assembling the silo top first, then lifting it ring by ring and inverting the wall panels 1," transforms a large amount of high-altitude work into ground-level or low-altitude work, effectively avoiding the safety risks associated with traditional high-altitude scaffolding erection methods. Simultaneously, this method utilizes a hydraulic lifting system distributed around the silo's circumference as the lifting power, avoiding the use of ultra-large cranes for overall lifting, reducing the stringent requirements on the load-bearing capacity of the construction site and the high equipment costs, providing a more feasible and economical solution for scenarios involving restricted spaces or the sequential construction of multiple silos. The entire construction process is logically clear, with each step interconnected, helping to ensure the stability and forming quality of the large thin-walled silo installation.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for inverting an alumina silo during construction, characterized in that: Includes the following steps: S1: Take measurements and determine the installation position of the annular base plate by measuring and positioning the top surface of the completed foundation; S2: Install and secure the annular base plate to the top surface of the foundation; S3: Set up temporary fixed supports for the central tube on the top surface of the foundation, install the central tube and correct its verticality and elevation; S4: Install multiple wall panel assembly supports evenly on the annular base plate, and assemble and fix the first ring of wall panels on the assembly supports; S5: Weld brackets to the lower part of the first ring wall panel, and hoist the prefabricated silo roof truss between the first ring wall panel and the central tube. Fix one end of the silo roof truss to the central tube and the other end to the top of the first ring wall panel to complete the assembly of the silo roof structure. S6: Multiple hydraulic jacking devices are evenly distributed around the inner circumference of the foundation, and each hydraulic jacking device is equipped with a support block for jacking the bracket. S7: Operate the hydraulic jacking device to simultaneously lift the first ring of wall panels, creating a new assembly space below; S8: In the new assembly space, assemble and weld the next ring of wall panels, and assemble and weld it with the already lifted wall panels; S9: Operate the hydraulic lifting device to lower its support block to the bottom, and weld the bracket to the lower part of the next ring of wall panels; S10: Repeat the steps of lifting, assembling and welding, lowering the support blocks and welding the brackets, and assemble the remaining wall panels from bottom to top, ring by ring, until the entire alumina silo is installed.

2. The alumina silo inverted installation method according to claim 1, characterized in that: The measurement and positioning steps include: setting up the measuring instrument at the center of the foundation, taking points and marking them at preset angle intervals on the edge of the foundation to determine the installation outline of the annular base plate.

3. The alumina silo inverted installation method according to claim 1, characterized in that: The steps for installing and fixing the annular base plate include: first, spot welding the pad to the preset position at the bottom of the base plate, then hoisting the base plate into place, adjusting the flatness and fixing it, and then welding and non-destructive testing the butt weld of the base plate.

4. The alumina silo inverted installation method according to claim 1, characterized in that: The hydraulic jacking device is controlled by a central control system to achieve synchronous operation of multiple jacking points.

5. The alumina silo inverted installation method according to claim 1, characterized in that: The hydraulic jacking device includes a release-lock jack, a lifting frame, and a lifting rod. The lifting frame is fixedly installed on the top surface of the foundation. The release-lock jack is a hollow shaft step hydraulic jack and is fixedly installed on the top of the lifting frame. The cylinder of the release-lock jack has a through hole in the center for the lifting rod to pass through. The lifting rod is a solid steel rod that vertically passes through the through hole of the release-lock jack. The bottom end of the lifting rod has a support block for supporting the bracket. The release-lock jack drives the lifting rod to make a step-by-step upward movement by alternately locking the upper and lower locking heads of the lifting rod.

6. The alumina silo inverted installation method according to claim 1, characterized in that: A connecting frame is provided between the top and bottom of adjacent lifting frames.

7. The alumina silo inverted installation method according to claim 5, characterized in that: S7 controls the action of the release-lock jack, causing the upper jack to lock the lifting rod, the lower jack to release, the piston rod to extend and drive the lifting rod to move upward, the support block to rise synchronously with the lifting rod to lift the bracket, thereby driving the chamber to rise; then, the lower jack locks the lifting rod to bear the weight, the upper jack to release, the piston rod to retract and reset, and this cycle is repeated until the chamber is lifted to the predetermined height.

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