DC Converter Valve Tower Assembly via Ground Pre-Assembly
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Solution Overview
Problem
The existing assembly methods for DC converter valve towers are inefficient and require a large number of devices due to the need to assemble and lift each module individually, which is time-consuming and poses safety risks, especially since the tower must be assembled high above the ground.
Innovation Solution
A method utilizing a lifting platform with an area greater than the shielding cases and valve layers, allowing multiple insulators to be placed on it, enabling the sequential lifting and suspension of valve layers from the ground, with a reduced number of devices and improved safety by allowing personnel to stand on the platform and using rollers and pulleys for controlled lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If each valve layer and shielding case are lifted and assembled individually using traditional methods, then the assembly can be completed with simple equipment, but the installation time is extremely long and efficiency is low
Solution Approach 1:
The patent combines multiple valve layers and shielding cases into a single integrated assembly unit that can be lifted and installed together. This merging of components into one assembly unit allows for significantly reduced installation time compared to traditional individual assembly methods, while maintaining structural integrity through pre-assembled connection structures.
Solution Approach 2:
The patent performs preliminary assembly of multiple valve layers and shielding cases on the ground before lifting them to the final installation position. This preliminary assembly includes pre-installing connection structures, insulation pull rods, and other components, which eliminates the need for complex high-altitude assembly operations and dramatically improves installation efficiency.
2Productivity
If a large number of devices are used to lift and assemble each module individually, then the assembly can be completed quickly, but the device complexity and cost increase significantly
Solution Approach 1:
The patent combines multiple valve layers and shielding cases into a single integrated assembly unit that can be lifted and installed together. This merging of components into one assembly unit allows for significantly reduced installation time compared to traditional individual assembly methods, while maintaining structural integrity through pre-assembled connection structures.
Solution Approach 2:
The patent performs preliminary assembly of multiple valve layers and shielding cases on the ground before lifting them to the final installation position. This preliminary assembly includes pre-installing connection structures, insulation pull rods, and other components, which eliminates the need for complex high-altitude assembly operations and dramatically improves installation efficiency.
3Stability of the object's composition
If assembly is performed high above the ground using traditional suspension methods, then the damping effect is good, but the safety risks and operational difficulty increase due to high-altitude work
Solution Approach 1:
The patent performs preliminary assembly of multiple valve layers and shielding cases on the ground before lifting them to the final installation position. This preliminary assembly includes pre-installing connection structures, insulation pull rods, and other components, which eliminates the need for complex high-altitude assembly operations and dramatically improves installation efficiency.
Solution Approach 2:
The patent uses an insulation pull rod as an intermediary component that provides both mechanical support and electrical insulation during the assembly process. This intermediary structure allows for safe ground-level assembly while maintaining the required damping and insulation properties for high-voltage DC transmission.
4Device complexity
If insulators between layers only bear tensile force, then the structure is simple, but the valve tower cannot be assembled on the ground and must be assembled high above the ground
Solution Approach 1:
The patent performs preliminary assembly of multiple valve layers and shielding cases on the ground before lifting them to the final installation position. This preliminary assembly includes pre-installing connection structures, insulation pull rods, and other components, which eliminates the need for complex high-altitude assembly operations and dramatically improves installation efficiency.
Solution Approach 2:
The patent uses an insulation pull rod as an intermediary component that provides both mechanical support and electrical insulation during the assembly process. This intermediary structure allows for safe ground-level assembly while maintaining the required damping and insulation properties for high-voltage DC transmission.
Data Source
AI summary
An assembly method for a DC converter valve includes: assembling a top shielding case: lifting the top shielding case to a designated height via a lifting platform, and then fixedly connecting the top shielding case to lower ends of insulators, fixedly connecting upper ends of the insulators to a truss, the truss being located on the top of a valve hall; assembling valve layers: lifting the valve layers to designated locations in a sequence from top to bottom via the lifting platform; and assembling a bottom shielding case: lifting the bottom shielding case to a designated height via the lifting platform, connecting the bottom shielding case to a lowermost valve layer and suspending the bottom shielding case below the lowermost valve layer via suspension insulators. By means of the present invention, the operation is convenient, a small quantity of devices is used, and the security and reliability are high.