Method for installing a high silo for converter steelmaking

Abstract

This invention provides a method for installing high-level material silos in converter steelmaking. Based on the structural layout characteristics of the high-level material silos, a temporary support structure is erected on a platform below the silos. Multiple high-level material silos are then hoisted one by one onto the temporary support structure, followed by the installation of silo beams. The longitudinal and transverse beams and spacer beams of the platform above the silos are assembled on the ground and hoisted into place. After positioning, the high-level material silos are lifted using a hand-operated hoist and connected to the platform beams above. After all silos are in place and welded, the temporary support structure is removed. This invention fully utilizes the temporary silo support as a temporary carrier for silo positioning. Through detailed design and calculation, and after implementation, construction efficiency is greatly improved, construction quality is guaranteed, and economic benefits are significant.

Description

Technical Field

[0001] This invention relates to the field of high-level silo installation technology, and more specifically, to a method for installing a high-level silo in converter steelmaking. Background Technology

[0002] Steelmaking processes require the addition of certain amounts of auxiliary raw materials such as lime and fluorite during smelting. These auxiliary raw materials are stored in silos at the top of the high-span steel structure platform, commonly known as high-level silos. The high-level silos are inverted square cone structures made of steel plates and are welded and suspended from the steel structure platform beams. These platform beams are called silo beams, and the high-level silos and silo beams together constitute the high-level silo structure. During the smelting process, the auxiliary raw materials are transported to the converter through feeding equipment such as vibrating feeders and weighing hoppers below the high-level silos to participate in the smelting of molten steel.

[0003] Typically, high-level silos are installed in sections using manual lifting. First, the upper section of the silo is lifted into place and welded. Then, the lower section is lifted and connected to the upper section. Due to the large number and weight of high-level silos, the construction is difficult and the installation efficiency is low. Another better method is to fabricate the silo as a whole and temporarily place it on a platform below it. Then, the silo is installed and finally lifted into place manually. However, the platform below the silo has many holes for equipment installation, making it impossible to place the silo. The platform beams and slabs cannot bear the load of the silo, posing a series of challenges to the overall installation of the silo.

[0004] Based on the above, the traditional method of installing high-level silos results in low installation accuracy, complex construction processes, and a significant consumption of manpower, resources, and time. A new method for installing high-level silos in converter steelmaking is needed to solve the problem of placing the silos stably on the lower platform. Summary of the Invention

[0005] In view of the above problems, the purpose of this invention is to provide a new method for installing high-level silos in converter steelmaking, so as to solve the problem of the silo being placed stably on the lower platform.

[0006] The method for installing a high-level silo in converter steelmaking provided by this invention includes the following steps:

[0007] S1. Assemble the silo beam and silo on the assembly platform according to the construction drawings;

[0008] S2. Construct a temporary support structure for the silo according to its layout and the distribution of the platform beams below.

[0009] S3. Mark the vertical projection line of the silo installation position above the temporary support structure of the silo, determine the temporary placement position of the silo, and place the silo in place.

[0010] S4. Calculate the lifting point position of the silo beam, then lift the silo beam and fix both ends of the silo beam to the main frame;

[0011] S5. Lift the hopper and connect it to the hopper beam in place;

[0012] S6. Adjust the horizontal position of the upper opening of the silo. After the horizontal position of the upper opening meets the requirements, align the lower opening. Then, weld and fix the silo to the silo beam according to the preset weld joint diagram.

[0013] S7. Remove the temporary support structure of the silo.

[0014] In a preferred embodiment, the silo beam comprises two main beams and a transverse beam vertically disposed between the two main beams.

[0015] In a preferred embodiment, when assembling the silo on the assembly platform, the silo wall, which is made in sections, is assembled upside down into a four-cone silo. The reinforcing plates on both sides of the silo opening are assembled with the surface of the assembly platform as the reference plane, and grooves are opened for the reinforcing plates shared between the silos.

[0016] In a preferred embodiment, the temporary support structure of the silo includes two support beams and support columns supporting the two support beams.

[0017] The hopper is positioned between the two supporting beams via reinforcing plates on both sides of the hopper opening.

[0018] In a preferred embodiment, the two supporting beams and the supporting columns are steel structures; and the supporting columns located at both ends of the two supporting beams are building structural columns.

[0019] A preferred embodiment is that the supporting columns are arranged in a crisscross pattern.

[0020] A preferred embodiment includes, before erecting the temporary support structure for the silo, verifying the load-bearing capacity of the temporary support structure for the high-level silo.

[0021] In a preferred embodiment, when verifying the bearing capacity of the temporary support structure of the silo, the two supporting beams are calculated and verified as simply supported structures in the assumed force system, and the supporting columns are calculated and verified as axially compressed members.

[0022] In a preferred embodiment, the upper opening of the silo located on the temporary support structure of the silo is lower than the bottom of the silo beam by a height difference of 100mm.

[0023] A preferred approach is to extract the center of gravity of the silo beam from the solid model on the software platform when calculating the lifting point position of the silo beam, and then project the center of gravity of the silo beam onto the ground at the assembly site so that the extension line of the lifting rope group passes through the projection point, i.e., through the center of gravity of the silo beam.

[0024] The above-mentioned method for installing high-level silos in converter steelmaking provided by the present invention involves erecting a temporary support structure for the silos on a platform below them. Multiple high-level silos are then hoisted one by one from one end onto the temporary support structure. The silos are hoisted to the temporary support structure first, followed by the upper silo beams. This method makes the construction process more rational, facilitates the subsequent silo lifting and positioning, and streamlines the hoisting of both the silos and the beams. It also effectively improves construction efficiency and work quality. Furthermore, the silo beams are assembled and hoisted as a whole on a ground-based assembly platform, reducing high-altitude work and improving construction safety. The hoisting layout calculations for the silo beams are accurately and reliably calculated using the steel structure detailing software Tekla Structures.

[0025] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below and particularly pointed out in the claims. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to include all such aspects and their equivalents. Attached Figure Description

[0026] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings and the contents of the claims, and with a more complete understanding of the invention. In the drawings:

[0027] Figure 1 This is a flowchart illustrating the installation method of a high-level silo for converter steelmaking according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the assembly of the silo beam according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the assembly of a silo according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of a temporary support structure for a silo according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the overall structure of the silo installation according to an embodiment of the present invention;

[0032] Figure 6This is a schematic diagram of a silo installed on a temporary support structure according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the hopper being lifted and positioned according to an embodiment of the present invention.

[0034] In the diagram, 1-hopper beam; 11-main beam; 12-crossbeam; 2-hopper; 21-reinforcing plate; 22-groove; 3-lower platform beam; 4-temporary support structure for hopper; 41-support beam; 42-support column; 43-column support.

[0035] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0036] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0037] In view of the defects in the existing high-level silo installation methods for converter steelmaking, the present invention adopts the method of erecting a splicing platform and a temporary support structure for the silo to solve the problem of the overall stable placement of the silo on the lower platform. At the same time, it is conducive to the subsequent lifting and positioning of the silo, as well as the hoisting of the silo and silo beams, and can effectively improve construction efficiency and work quality.

[0038] Figure 1 This is a flowchart illustrating the installation method of a high-level silo for converter steelmaking according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly of the silo beam according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly of a silo according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a temporary support structure for a silo according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the overall structure of the silo installation according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a silo installed on a temporary support structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the hopper being lifted and positioned according to an embodiment of the present invention.

[0039] like Figures 1 to 7 As shown in the figure, the method for installing a high-level silo in converter steelmaking provided by the present invention includes the following steps:

[0040] S1. Assemble the silo beam 1 and silo 2 on the assembly platform according to the construction drawings.

[0041] The silo beam 1 includes two main beams 11 and a transverse partition beam 12 vertically arranged between the two main beams 11. The two main beams 11 are arranged longitudinally and together with the transverse partition beam 12 form a closed structural space for storing materials. During assembly, the distances L1 and L2 between the two ends of the two main beams 11 are positioned according to the dimensions in the drawings, and the distances L3 and L4 of the diagonals of the frame formed by the main beams 11 are adjusted at the same time.

[0042] It should be noted that before adjusting the spacing L1 and L2 between the two ends of the two main beams 11 and the diagonals L3 and L4, the spacing and diagonal distance of the corresponding positions of the main frame columns or frame main beams should be checked. If there is any deviation, the positioning should be adjusted according to the actual dimensions of the corresponding positions during installation.

[0043] In a preferred embodiment of the present invention, the hopper 2 is composed of 4 hopper walls made in sections; and with the surface of the assembly platform as the reference plane, the reinforcing plates 21 on both sides of the hopper opening are assembled, and slots 22 for the reinforcing plates 21 shared between the hoppers 2 are opened. After all the hoppers 2 are in place, the reinforcing plates 21 are installed, so that all the reinforcing plates 21 are on the same plane, so that the hopper 2 remains horizontal after installation, improving installation efficiency and installation quality.

[0044] S2. Construct a temporary support structure 4 for the silo 2 according to its layout and the distribution of the platform beams 3 below.

[0045] After the silo 2 is fully assembled, a temporary support structure 4 is erected below the final installation position of the silo 2; the temporary support structure 4 includes two support beams 41 and support columns 42 supporting the two support beams 41.

[0046] The design of the temporary support structure 4 for the silo first involves arranging the support beams 41 on both sides according to the position of the reinforcing plates 21 on both sides of the silo 2. The spacing between the two rows of support beams 41 ensures that the reinforcing plates 21 of the silo 2 can be placed on their upper surface. The silo 2 is set between the two support beams 41 through the reinforcing plates 21 on both sides of the silo opening, without interfering with the silo wall, thus achieving the purpose of temporarily supporting the entire silo 2. Then, according to the position of the lower platform beam 3, several support columns 42 are arranged below the support beams 41.

[0047] In a preferred embodiment of the present invention, the upper opening of the silo 2 located on the temporary support structure 4 is lower than the bottom of the silo beam 1 by about 100mm. This can minimize the lifting distance of the silo 2, speed up the installation process, and ensure the horizontality, verticality and verticality of the silo 2 and the vertical spacing required for adjusting the lower opening position of the silo 2.

[0048] In a preferred embodiment of the present invention, the two supporting beams 41 and the supporting columns 42 are steel structures, which are sturdy, durable and easy to install and dismantle; and the supporting columns 42 located at both ends of the two supporting beams 41 are building structural columns, which can form a stable support structure in the longitudinal direction, which is beneficial to improving the overall stability of the temporary support structure 4 of the silo, and there is no need to consider arranging a scissor support structure.

[0049] In addition, the supporting columns 42 in the supporting structure are an independent structural system, and a supporting system needs to be arranged in the longitudinal direction. That is, there are cross-distributed column supports 43 between the supporting columns 42 of the steel structure, which further improves the overall stability of the temporary support structure 4 of the silo.

[0050] In a preferred embodiment of the present invention, before erecting the temporary support structure 4 of the silo, it is necessary to verify the bearing capacity of the temporary support structure 4 of the silo. Since the construction environment of the silo installation is stable and the stress on the support structure is clear during the installation process, the two support beams 41 are calculated and verified as simply supported structures, and the support column 42 is calculated and verified as an axially compressed member.

[0051] S3. Mark the vertical projection line of the installation position of the silo 2 above the temporary support structure 4 of the silo, determine the temporary placement position of the silo 2, and place the silo 2 in place.

[0052] The vertical projection lines of the installation positions of the silos 2 are marked above the two erected support beams 41 to prevent the temporary placement of the silos 2 from deviating too much, causing them to overlap and pile up. Then, a crane is used to lift and place the silos 2 one by one into position, starting from one end.

[0053] S4. Calculate the lifting point position of the silo beam 1, then lift the silo beam 1 and fix both ends of the silo beam 1 to the main frame.

[0054] After the silo 2 is in place on the temporary support structure 4, the silo beam 1 above it is hoisted. The hoisting of the silo beam 1 requires accurate calculation of the hoisting point position of the rope.

[0055] In a preferred embodiment of the present invention, when calculating the lifting point position of the silo beam 1, the center of gravity position of the silo beam 1 is extracted from the solid model on the TeklaStructures platform, and the center of gravity position of the silo beam 1 is projected onto the ground at the assembly site so that the extension line of the lifting rope group passes through the projection point, that is, through the center of gravity of the silo beam 1.

[0056] The hoisting process employs a four-point hoisting method, with slings of equal length, and the hoisting point positions are determined based on the center of gravity. The method is as follows:

[0057] Let H be the vertical distance between the hook and the upper surface of the hopper beam 1, and L be the rope length. Then, what is the projected length of the four slings?

[0058] That is, draw a circle on the plan with the center of gravity as the center and the projected length S as the radius. The position of the intersection of the circle with the center line of the two main beams 11 is the position of the lifting point.

[0059] S5. Lift the hopper 2 and connect it to the hopper beam 1 in place.

[0060] After the two ends of the silo beam 1 are connected and fixed to the main frame columns or main frame beams, the silo 2 is lifted and positioned.

[0061] The lifting of the material bin 2 is carried out by hand chain hoists. Three hand chain hoists are arranged for each material bin 2 for lifting. At the same time, the position of the hand chain hoist must ensure a certain length of lifting chain to ensure that the diagonal pulling force is not too large when the material bin 2 is adjusted horizontally.

[0062] S6. Adjust the horizontal position of the upper opening of the hopper 2. After the upper opening meets the requirements, align the lower opening. Then, weld and fix the hopper 2 to the hopper beam 1 according to the preset weld joint diagram.

[0063] After the hopper 2 is lifted into place, the upper opening of the hopper 2 needs to be adjusted to meet the requirements before the lower opening is aligned. The lower opening of the hopper 2 can be aligned by adjusting the gap between the upper opening and the bottom of the hopper beam 1 in various directions and rotating the hopper 2 to make the lower opening center aligned. After the hopper 2 is aligned, welding is carried out according to the weld node diagram.

[0064] S7. Remove the temporary support structure of the silo 4.

[0065] After all the silos 2 were welded, the supporting structure was completely removed. At this point, the installation of the high-level silos for converter steelmaking was completed.

[0066] As can be seen from the above description and accompanying drawings, the high-level silo installation method for converter steelmaking provided by this invention, based on the structural layout characteristics of the high-level silo, involves erecting a temporary support structure for the silo on a platform below it. Multiple high-level silos are then hoisted one by one onto this temporary support structure. Next, silo beams are installed. The main beam and transverse beams of the silo beams are assembled on the ground and hoisted as a whole. After positioning, the high-level silos are lifted using a hand-operated hoist and connected to the upper silo beam. Once all silos are in place and welded, the temporary support structure is removed. This invention fully utilizes the temporary silo support as a temporary carrier for silo positioning. Through detailed design and calculation, and after implementation, construction efficiency is greatly improved, construction quality is guaranteed, and economic benefits are significant.

[0067] Based on the above description of the technical solution and specific implementation of the present invention, it can be determined that, compared with the traditional method of installing high-level silos in converter steelmaking, the method of installing high-level silos in converter steelmaking provided by the present invention is advanced and scientific, ingeniously conceived, simple to implement, and has sufficient theoretical basis. It has promotional value in the installation of silos on steel structure platform structures. Moreover, the present invention makes full use of the temporary support structure of the silo as a temporary carrier for the silo placement. After detailed design and calculation, the construction efficiency is greatly improved, the construction quality is guaranteed, and the economic benefits are significant.

[0068] The method for installing a high-level silo in converter steelmaking according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the method for installing a high-level silo in converter steelmaking according to the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A method of installing a high bin for a converter steelmaking, characterized in that, Includes the following steps: S1. Assemble the silo beam and silo on the assembly platform according to the construction drawings; S2. Construct a temporary support structure for the silo according to its layout and the distribution of the platform beams below. S3. Mark the vertical projection line of the silo installation position above the temporary support structure of the silo, determine the temporary placement position of the silo, and place the silo in place. S4. Calculate the lifting point position of the silo beam, then lift the silo beam and fix both ends of the silo beam to the main frame; S5. Lift the hopper and connect it to the hopper beam in place; S6. Adjust the horizontal position of the upper opening of the silo. After the horizontal position of the upper opening meets the requirements, align the lower opening. Then, weld and fix the silo to the silo beam according to the preset weld joint diagram. S7. Remove the temporary support structure of the silo. When assembling the hopper on the assembly platform, the hopper walls, which are made in sections, are inverted and assembled into a four-conical hopper. Using the surface of the assembly platform as a reference plane, the reinforcing plates on both sides of the hopper opening are assembled, and slots are made for the reinforcing plates shared between the hoppers. When calculating the lifting point position of the silo beam, the center of gravity position of the silo beam is extracted through the solid model on the software platform. At the assembly site, the center of gravity position of the silo beam is projected onto the ground so that the extension line of the lifting rope group passes through the projection point, that is, through the center of gravity of the silo beam.

2. The method of claim 1, wherein the high silo installation method is a method of installing a high silo for a converter steelmaking process, and the high silo is installed in a position higher than the roof of the building. The silo beam includes two main beams and a transverse beam vertically arranged between the two main beams.

3. The method for installing a high-level silo in converter steelmaking as described in claim 1, characterized in that, The temporary support structure for the silo includes two support beams and support columns that support the two support beams. The hopper is positioned between the two supporting beams via reinforcing plates on both sides of the hopper opening.

4. The method for installing a high-level silo in converter steelmaking as described in claim 3, characterized in that, The two supporting beams and the supporting columns are steel structures; and the supporting columns located at both ends of the two supporting beams are building structural columns.

5. The method for installing a high-level silo in converter steelmaking as described in claim 3, characterized in that, The supporting columns are arranged in a cross pattern.

6. The method for installing a high-level silo in converter steelmaking as described in claim 3, characterized in that, Before erecting the temporary support structure for the silo, the following is also included: The bearing capacity of the temporary support structure of the high-level silo was verified.

7. The method for installing a high-level silo in converter steelmaking as described in claim 6, characterized in that, When verifying the bearing capacity of the temporary support structure of the silo, in the assumed force system, the two supporting beams are calculated and verified as simply supported structures, and the supporting columns are calculated and verified as axially compressed members.

8. The method for installing a high-level silo in converter steelmaking as described in claim 1, characterized in that, The upper opening of the silo, located on the temporary support structure of the silo, is lower than the bottom of the silo beam by 100mm.

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