On-Site Valve Seat Machining Device for Turbine Repair
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for repairing an eroded valve seat in a turbine valve device require costly and time-consuming removal and transport of the valve device between power generation and processing plants, involving significant logistical and operational challenges.
Innovation Solution
A valve seat processing machine that can be attached directly to the valve body portion of the valve device, featuring a base portion, a main body portion, a support portion, a rotatable spindle, and a tool holder, allowing for on-site repair without the need for removal or transport, with adjustable attachment and anti-vibration features to prevent interference and ensure precise processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the valve device is removed and transported to a processing plant for repair, then the valve seat can be repaired with specialized equipment, but the repair time and cost increase significantly
Solution Approach 1:
The patent extracts the essential processing functions from a complete valve device and creates a standalone processing machine that can be attached only to the valve body portion. This allows the processing capabilities to be separated from the need to transport the entire valve device, enabling on-site repair while maintaining specialized processing quality
Solution Approach 2:
The patent divides the valve device into the valve body portion and the valve drive portion, and accordingly divides the processing machine into a base portion that attaches to the valve body and a main body portion that contains the processing mechanisms. This segmentation allows the processing machine to be compact and portable while still providing comprehensive valve seat repair capabilities
2Ease of manufacture
If the valve device is removed and transported for repair, then comprehensive processing can be performed, but the operational complexity and cost increase
Solution Approach 1:
The patent combines multiple processing functions (milling, grinding, honing) into a single integrated processing machine that attaches to the valve body. This merging of functions into one portable unit reduces the operational complexity compared to transporting the valve device to a facility with multiple separate processing machines
Solution Approach 2:
The processing machine is designed with universal capabilities to perform multiple types of valve seat processing operations using different tools that can be attached to the spindle. This multi-functionality in a single portable unit replaces the need for multiple specialized machines at a processing plant
3Ease of operation
If a processing machine is attached to the valve body portion, then on-site repair becomes possible, but the machine must be compact enough to not interfere with surrounding structures
Solution Approach 1:
The processing machine employs a nested structure where the tool holder and processing tools are contained within the main body portion, which in turn is mounted on the compact base portion that attaches to the valve body. This nested arrangement minimizes the overall volume while maintaining full processing capabilities
Solution Approach 2:
The processing machine uses a movable main body portion that can be positioned and adjusted relative to the valve body portion as needed. This dynamic positioning capability allows the machine to adapt to different valve configurations and spatial constraints at the installation site
Data Source
AI summary
A valve seat processing machine configured to process a valve seat in a valve device including a valve body portion which forms a flow passage of fluid and a valve drive portion which drives a valve element capable of tightly engaging with the valve seat includes: a base portion attached to the valve body portion; a main body portion movable relative to the base portion; a support portion movable relative to the main body portion in a drive direction of the valve element; a main spindle rotatable relative to the support portion about an axis parallel to the drive direction of the valve element; a tool holder configured to hold a tool for processing the valve seat and movable relative to the main spindle in a direction intersecting the drive direction of the valve element; and a controller configured to control movement of the support portion and the tool holder.