Method for installing a steel structure platform in a heat absorption tower

Abstract

This invention relates to the field of heat absorption tower construction technology and provides a method for installing a steel structure platform inside a heat absorption tower. The invention breaks down the steel structure platform into smaller parts on the ground outside the tower, then assembles these parts into a whole on an internal working platform. Based on the design conditions, two methods are designed: a "one-time hoisting of the entire double-layer steel structure platform inside the tower" and a "one-time hoisting of the entire single-layer steel structure platform inside the tower." This significantly improves installation efficiency and reduces the installation time by more than 45%. Simultaneously, it cleverly utilizes the already constructed steel structure platform on the lower layer inside the tower as the assembly work surface, and simultaneously installs permanent and temporary combined safety auxiliary facilities, greatly reducing the risks of high-altitude operations.

Description

Technical Field

[0001] This invention relates to the field of heat absorption tower construction technology, specifically to a method for installing a steel structure platform inside a heat absorption tower. Background Technology

[0002] Tower-type concentrated solar power (CSP) plants are a key technological path supporting the construction of a new power system in my country. The absorber tower, as the core structure of the power plant, typically uses a reinforced concrete outer shell and a steel structure internal platform, which can have dozens of layers. The internal steel platform of the absorber tower is a critical load-bearing structure for installing salt pipelines and related equipment; its construction efficiency and quality directly affect the overall construction cycle and long-term safe operation of the power plant. Conventional construction methods involve first installing steel brackets one by one on the inner wall of the absorber tower, and then installing steel beams one by one or frame by frame from top to bottom or bottom to top. This presents significant challenges, including a large amount of high-altitude hoisting and assembly work, high safety risks, serious overlap in work processes, and a lengthy construction period. Summary of the Invention

[0003] The present invention aims to solve the problems of low installation efficiency and high risk of the steel structure platform inside the heat absorption tower in the prior art, and provides a method for installing the steel structure platform inside the heat absorption tower.

[0004] To achieve the above objectives, the present invention provides a method for installing a steel structure platform inside a heat absorption tower. The steel structure platform inside the heat absorption tower includes a maintenance layer, a pipe installation layer, and an equipment installation layer disposed within the heat absorption tower. The method includes:

[0005] S1: Divide each pipe installation layer, maintenance layer and equipment installation layer into several transportable and hoistable modules, and pre-assemble the components of the steel structure platform on the ground outside the heat absorption tower to obtain the several transportable and hoistable modules. S2: A maintenance layer is installed inside the heat absorption tower using multiple modules; S3: Hoist multiple modules that can form a set of pipe installation layers and a set of maintenance layers onto the installed maintenance layer and assemble them to obtain an assembled set of pipe installation layers and a set of maintenance layers. S4: Connect the assembled set of pipe installation layers and the set of maintenance layers to obtain a double-layer steel structure platform hoisting assembly, and install the double-layer steel structure platform hoisting assembly into the heat absorption tower; S5: Repeat S3~S4 until the installation of all pipe installation layers and maintenance layers is completed; S6: Hoist multiple modules that can form a set of equipment installation layers onto the installed maintenance layer and assemble them to obtain a set of assembled equipment installation layers, and install the assembled equipment installation layers into the heat absorption tower; S7: Hoist multiple modules that can form a set of equipment installation layers onto the installed equipment installation layer to obtain a set of assembled equipment installation layers, and install the assembled equipment installation layers into the heat absorption tower; S8: Repeat S7 until all equipment installation layers are completed. At this point, the steel structure platform inside the heat absorption tower is installed.

[0006] In one embodiment, before hoisting the pipe installation layer, maintenance layer and / or equipment installation layer, sleeper blocks are pre-arranged on the installed maintenance layer and / or equipment installation layer, and the pipe installation layer, maintenance layer and / or equipment installation layer are hoisted on the sleeper blocks.

[0007] In one embodiment, during the assembly of the pipe installation layer, maintenance layer and equipment installation layer, steel grating covers and guardrails for high-altitude operation protection are also installed simultaneously.

[0008] In one embodiment, connecting the assembled set of pipe installation layers and the set of maintenance layers to obtain a double-layer steel structure platform hoisting assembly includes: Temporarily suspend the steel brackets at the corresponding positions of the steel beams of the pipe installation layer and the maintenance layer at the ends of the steel beams; The assembled pipe installation layer and maintenance layer are connected to form a double-layer steel structure platform hoisting assembly.

[0009] In one embodiment, the installation of the double-layer steel structure platform hoisting assembly into the heat absorption tower includes: The lifting points of the tower crane attached to the outer wall of the heat absorption tower are calculated in advance. After the double-layer steel structure platform hoisting assembly is test-lifted as a whole and the center of gravity is adjusted, it is lifted to the design height. Weld the steel brackets of the pipe installation layer of the double-layer steel structure platform hoisting assembly to the corresponding steel plates pre-embedded in the inner wall of the heat absorption tower, and then adjust the position of the double-layer steel structure platform hoisting assembly before placing it in place; The steel brackets of the maintenance layer of the double-layer steel structure platform hoisting assembly are welded to the corresponding steel plates embedded in the inner wall of the heat absorption tower. After adjusting the position of the double-layer steel structure platform hoisting assembly, it is in place, and the installation of the double-layer steel structure platform hoisting assembly is completed.

[0010] In one embodiment, the steel brackets at corresponding positions of the steel beams of the pipe installation layer and the maintenance layer are temporarily suspended at the ends of the steel beams by hand-operated hoists; The pipeline installation layer and the maintenance layer are connected by a hand-operated hoist.

[0011] In one embodiment, installing the assembled equipment mounting layer into the heat absorption tower includes: Temporarily suspend the steel brackets at the corresponding positions of the steel beams of the equipment installation layer at the ends of the steel beams; Calculate the lifting points of the tower crane attached to the outer wall of the heat absorption tower in advance, conduct a trial lift of the entire equipment installation layer and adjust the center of gravity before lifting it to the design height; Weld each steel bracket of the equipment installation layer to the corresponding steel plate pre-embedded in the inner wall of the heat absorption tower, and then adjust the position of the equipment installation layer before placing it in place.

[0012] In one embodiment, the steel brackets at the corresponding positions of the steel beams of the equipment mounting layer are temporarily suspended from the ends of the steel beams by a hand-operated hoist.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention involves breaking down the steel structure platform into smaller parts on the ground outside the tower and then assembling them into a whole on the working platform inside the tower. Based on the design conditions, two methods were designed: a "one-time hoisting of the entire double-layer steel structure platform inside the tower" and a "one-time hoisting of the entire single-layer steel structure platform inside the tower." This significantly improves installation efficiency and reduces the installation time by more than 45%. Simultaneously, it cleverly utilizes the already constructed steel structure platform on the lower level inside the tower as the assembly work surface, and the installation of permanent and temporary combined safety auxiliary facilities is completed concurrently with the assembly, greatly reducing the risks of working at height. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a flowchart illustrating a method for installing a steel structure platform inside a heat absorption tower according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the double-layer steel structure platform hoisting assembly according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the device mounting layer according to an embodiment of the present invention.

[0016] In the diagram: 1. Maintenance layer; 2. Tower crane hook; 3. Pipeline installation layer; 4. Hand chain hoist; 5. Equipment installation layer; 501. Steel beam; 502. Steel grating cover; 503. Guardrail; 504. Steel bracket. Detailed Implementation

[0017] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0018] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0019] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0020] See Figures 1-3 This embodiment provides a method for installing a steel structure platform inside a heat absorption tower. The steel structure platform includes a maintenance layer 1, a pipe installation layer 3, and an equipment installation layer 5, all located within the heat absorption tower. The pipe installation layer 3 is primarily used for molten salt pipe installation and load-bearing, and its design is relatively simple. The maintenance layer 1 and equipment installation layer, in addition to pipe and equipment installation, also need to accommodate daily operation and maintenance requirements, making their design relatively complex. In conventional designs, the pipe installation layer 3 and maintenance layer 1 are arranged alternately, while the equipment installation layer is arranged in multiple continuous layers. The method includes: S1: Divide each pipe installation layer 3, maintenance layer 1 and equipment installation layer 5 into several transportable and hoistable modules, and pre-assemble the components of the steel structure platform on the ground outside the heat absorption tower to obtain the several transportable and hoistable modules. Based on the lifting capacity of the tower crane and the limited hoisting space inside the heat absorption tower, the steel structure platform of each floor is reasonably divided into several small modules. On the ground outside the heat absorption tower, a truck crane is used to pre-assemble each small module to form a unit that is easy to hoist.

[0021] S2: Install a maintenance layer 1 inside the heat absorption tower using multiple modules; this step is carried out according to conventional methods and serves as the initial work platform after installation.

[0022] S3: Hoist multiple modules that can form a set of pipe installation layer 3 and a set of maintenance layer 1 onto the installed maintenance layer 1 and assemble them to obtain an assembled set of pipe installation layer 3 and a set of maintenance layer 1. In this embodiment, the modules or steel beams 501 of the pipeline installation layer 3 are hoisted from outside the tower in batches to the steel structure platform of the maintenance layer 1 that has been installed in S2, and placed on the pre-arranged sleeper blocks. The maintenance layer 1 is used as the working surface to complete the overall assembly of the pipeline installation layer 3. The maintenance layer 1 is assembled on the installed maintenance layer 1 in the same way.

[0023] S4: Connect the assembled set of pipe installation layer 3 and maintenance layer 1 to obtain a double-layer steel structure platform hoisting assembly, and install the double-layer steel structure platform hoisting assembly into the heat absorption tower; In this embodiment, the steel brackets 504 at the corresponding positions of the assembled set of pipe installation layer 3 and set of maintenance layer 1 steel beams 501 are temporarily suspended at the ends of the steel beams 501 by a hand-operated hoist 4. Then, the assembled pipe installation layer 3 steel structure platform is reliably connected to the maintenance layer 1 steel structure platform using a hand-operated hoist 4, forming a stable double-layer steel structure platform hoisting assembly.

[0024] During the assembly of the steel structure platform of the pipeline installation layer 3 and the maintenance layer 1, the permanent and temporary combined steel grating cover plate 502 and guardrail 503 and other safety facilities of the layer are installed simultaneously to reduce the amount of high-altitude work and the risk of safety operations. After confirming that the double-layer steel structure platform hoisting assembly is securely connected, the tower crane attached to the outer wall of the heat absorption tower is used for hoisting. The tower crane hook 2 is at the pre-calculated hoisting point. After the center of gravity of the steel structure platform assembly of pipeline installation layer 3 + maintenance layer 1 is adjusted by trial hoisting, it is lifted to the design height. The "layered placement" strategy was adopted. First, the steel brackets 504 of the pipeline installation layer 3 steel structure platform were welded to the corresponding steel plates pre-embedded in the inner wall of the heat absorption tower, and the position of the steel structure platform was adjusted and precisely positioned. Then, the steel brackets 504 of the maintenance layer 1 steel structure platform were welded to the corresponding steel plates pre-embedded in the inner wall of the heat absorption tower, and the position of the steel structure platform was adjusted and precisely positioned, thus completing the final installation of the double-layer steel structure platform hoisting assembly. The entire hoisting process required unified command by a dedicated person to ensure a slow and stable process.

[0025] S5: Repeat S3~S4 until the installation of all pipe installation layers 3 and maintenance layers 1 is completed; S6: Hoist multiple modules that can form a set of equipment installation layers onto the installed maintenance layer 1 and assemble them to obtain a set of assembled equipment installation layers, and install the assembled equipment installation layers into the heat absorption tower. S7: Hoist multiple modules that can form a set of equipment installation layers onto the installed equipment installation layer to obtain a set of assembled equipment installation layers, and install the assembled equipment installation layers into the heat absorption tower; In this embodiment, the installation of the steel structure platform for the equipment installation layer is similar to that of the maintenance layer 1. However, because it is a continuous multi-layer structure, using a single-stage hoisting method for a double-layer steel structure platform assembly would place extremely high demands on the tower crane's lifting capacity, which would be disadvantageous in terms of construction efficiency, safety, and economy. Therefore, the equipment layer steel structure platform adopts a single-stage hoisting method for a single layer. The core construction process is the same as the single-stage hoisting method for a double-layer steel structure platform assembly, the main difference being that the object being hoisted is a single-layer steel structure platform layer, rather than a two-layer assembly. The main process is as follows: using the already installed next-layer steel structure platform (maintenance layer 1 or equipment installation layer) as the working surface, assembling the steel structure platform of this equipment installation layer, and then using a tower crane for single-stage hoisting into place. During the assembly process, the temporary connection of the steel brackets 504 and the installation of safety facilities must also be completed simultaneously to ensure construction safety and efficiency.

[0026] S8: Repeat S7 until all equipment installation layers are completed. At this point, the steel structure platform inside the heat absorption tower is installed.

[0027] This embodiment employs different overall hoisting strategies based on the design characteristics of the platforms for each of the pipeline installation layer 3, maintenance layer 1, and equipment installation layer. For the pipeline installation layer 3 and maintenance layer 1, which are arranged alternately, the "one-time hoisting of the double-layer steel structure platform within the tower" method is used. On the maintenance layer 1 steel structure platform below, which has already been installed, the assembly of the two steel structure platforms (one for pipeline installation layer 3 and one for maintenance layer 1) is completed sequentially. Then, the double-layer steel structure platform assembly is temporarily connected into a stable assembly using calculated hand-operated hoists 4, and finally, it is hoisted into place by a tower crane in one go. For equipment installation layers with multiple continuous layers, considering the large weight of the double-layer steel structure platform assembly and the excessively high lifting capacity requirements of the tower crane, the "one-time hoisting of the single-layer steel structure platform within the tower" method is used. After assembling the platform on the maintenance layer 1 or equipment installation layer below, it is hoisted into place by a tower crane. During the assembly of the steel structure platform inside the tower, the installation of safety auxiliary facilities is completed simultaneously, realizing integrated construction of structural hoisting and safety protection. At the same time, the steel brackets 504 required for the installation of each platform are temporarily connected to the ends of the steel beams 501 by hand-operated hoists 4, and are hoisted into place synchronously with the steel structure platform, which greatly reduces the number of hoisting operations for the steel brackets 504.

[0028] The above are merely preferred embodiments of the present invention. It should be noted that the present invention is not limited to the above embodiments. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for installing a steel structure platform inside a heat absorption tower, the steel structure platform inside the heat absorption tower comprising an inspection layer, a pipe installation layer, and an equipment installation layer disposed within the heat absorption tower, characterized in that, The method includes: S1: Divide each pipe installation layer, maintenance layer and equipment installation layer into several transportable and hoistable modules, and pre-assemble the components of the steel structure platform on the ground outside the heat absorption tower to obtain the several transportable and hoistable modules. S2: A maintenance layer is installed inside the heat absorption tower using multiple modules; S3: Hoist multiple modules that can form a set of pipe installation layers and a set of maintenance layers onto the installed maintenance layer and assemble them to obtain an assembled set of pipe installation layers and a set of maintenance layers. S4: Connect the assembled set of pipe installation layers and the set of maintenance layers to obtain a double-layer steel structure platform hoisting assembly, and install the double-layer steel structure platform hoisting assembly into the heat absorption tower; S5: Repeat S3~S4 until the installation of all pipe installation layers and maintenance layers is completed; S6: Hoist multiple modules that can form a set of equipment installation layers onto the installed maintenance layer and assemble them to obtain a set of assembled equipment installation layers, and install the assembled equipment installation layers into the heat absorption tower; S7: Hoist multiple modules that can form a set of equipment installation layers onto the installed equipment installation layer to obtain a set of assembled equipment installation layers, and install the assembled equipment installation layers into the heat absorption tower; S8: Repeat S7 until all equipment installation layers are completed. At this point, the steel structure platform inside the heat absorption tower is installed.

2. The method for installing a steel structure platform inside a heat-absorbing tower according to claim 1, characterized in that, Before hoisting the pipe installation layer, maintenance layer and / or equipment installation layer, sleeper blocks are pre-arranged on the installed maintenance layer and / or equipment installation layer, and the pipe installation layer, maintenance layer and / or equipment installation layer are hoisted on the sleeper blocks.

3. The method for installing the steel structure platform inside the heat absorption tower according to claim 2, characterized in that, During the assembly of the pipeline installation layer, maintenance layer and equipment installation layer, steel grating covers and guardrails for high-altitude operation protection are also installed simultaneously.

4. The method for installing a steel structure platform inside a heat-absorbing tower according to claim 3, characterized in that, The assembly of a set of pipe installation layers and a set of maintenance layers is connected to form a double-layer steel structure platform hoisting assembly, including: Temporarily suspend the steel brackets at the corresponding positions of the steel beams of the pipe installation layer and the maintenance layer at the ends of the steel beams; The assembled pipe installation layer and maintenance layer are connected to form a double-layer steel structure platform hoisting assembly.

5. The method for installing a steel structure platform inside a heat-absorbing tower according to claim 4, characterized in that, The process of hoisting and installing the double-layer steel structure platform assembly into the heat absorption tower includes: The lifting points of the tower crane attached to the outer wall of the heat absorption tower are calculated in advance. After the double-layer steel structure platform hoisting assembly is test-lifted as a whole and the center of gravity is adjusted, it is lifted to the design height. Weld the steel brackets of the pipe installation layer of the double-layer steel structure platform hoisting assembly to the corresponding steel plates pre-embedded in the inner wall of the heat absorption tower, and then adjust the position of the double-layer steel structure platform hoisting assembly before placing it in place; The steel brackets of the maintenance layer of the double-layer steel structure platform hoisting assembly are welded to the corresponding steel plates embedded in the inner wall of the heat absorption tower. After adjusting the position of the double-layer steel structure platform hoisting assembly, it is in place, and the installation of the double-layer steel structure platform hoisting assembly is completed.

6. The method for installing a steel structure platform inside a heat-absorbing tower according to claim 4 or 5, characterized in that, The steel brackets at the corresponding positions of the steel beams of the pipeline installation layer and the maintenance layer are temporarily suspended at the ends of the steel beams by hand-operated hoists. The pipeline installation layer and the maintenance layer are connected by a hand-operated hoist.

7. The method for installing a steel structure platform inside a heat-absorbing tower according to claim 3, characterized in that, The process of installing the assembled equipment mounting layer into the heat absorption tower includes: Temporarily suspend the steel brackets at the corresponding positions of the steel beams of the equipment installation layer at the ends of the steel beams; Calculate the lifting points of the tower crane attached to the outer wall of the heat absorption tower in advance, conduct a trial lift of the entire equipment installation layer and adjust the center of gravity before lifting it to the design height; Weld each steel bracket of the equipment installation layer to the corresponding steel plate pre-embedded in the inner wall of the heat absorption tower, and then adjust the position of the equipment installation layer before placing it in place.

8. The method for installing a steel structure platform inside a heat-absorbing tower according to claim 7, characterized in that, The steel brackets at the corresponding positions of the steel beams in the equipment installation layer are temporarily suspended from the ends of the steel beams by hand-operated hoists.

Images