Positioning Sleeve and Movable Platform for Reactor Vessel Trepanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for cutting holes and trepans in nuclear reactor vessels face challenges in limited space, leading to inefficiencies in tool alignment and increased radiation exposure for service personnel.
Innovation Solution
A device with a box-shaped repair cabin, a positioning sleeve, and a movable platform with height-adjustable rotatable wheel supports, along with a mechanism for rotating and feeding the cutting tool, ensures accurate alignment and reduces installation time, incorporating a catcher for trepan storage and a pneumatic drilling machine with a core drill for precise cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a known machine for cutting caissons is used, then cutting operations can be performed, but the device cannot cut holes inside the nuclear reactor vessel due to limited space in the repair cabin
Solution Approach 1:
The device is divided into separate functional modules: a positioning sleeve mounted on the repair cabin wall, a movable platform with cutting mechanism, and a catcher for collecting cut pieces. This segmentation allows each component to be optimized independently and facilitates operation in the limited repair cabin space.
Solution Approach 2:
The cutting mechanism is mounted on the movable platform, which can be positioned within the repair cabin. The positioning sleeve extends through the cabin wall to provide external support while accommodating internal operations. This nested arrangement allows the cutting device to operate inside the confined cabin space while maintaining structural stability.
2Manufacturing precision
If cutting operations are performed in limited space, then operations can be completed, but tool alignment accuracy is compromised
Solution Approach 1:
The positioning sleeve is pre-installed on the repair cabin wall with precisely machined internal surfaces that guide the cutting tool. This preliminary positioning structure ensures accurate tool alignment before cutting operations begin, eliminating the need for complex real-time alignment adjustments in the confined space.
Solution Approach 2:
The positioning sleeve acts as an intermediary element between the repair cabin structure and the cutting mechanism. It provides a stable reference frame and guidance surfaces that ensure precise tool alignment, decoupling the alignment function from the limited cabin space constraints.
3Ease of operation
If multiple process operations are performed at one workplace, then operational convenience is improved, but device complexity increases
Solution Approach 1:
The movable platform serves multiple functions: it supports the cutting mechanism, provides positioning adjustment, and facilitates movement to different cutting locations. The positioning sleeve simultaneously provides structural support, alignment guidance, and mounting for the catcher mechanism. This multi-functionality consolidates operations at one workplace without proportionally increasing overall device complexity.
Data Source
AI summary
Device for holes and trepans cutting containing a movable platform, a mechanism of rotation and feeding of the cutting tool installed on the platform, a box-shaped repair cabin with a through hole in a vertical wall thereof and, accommodating a positioning sleeve with an inner flange facing the inside of the repair cabin and an outer flange fixed outside the repair cabin. A mounting fixture secured on the inner flange of the positioning sleeve comprises a mounting plate fixed on the inner flange of the positioning sleeve. A rotating positioning plate is pivotally installed on the mounting plate. The mounting plate and the rotating positioning plate are provided with a mechanism for fixing in the closed position. The movable platform is provided with height-adjustable rotatable wheel supports. A catcher is fixed on the outer flange of the positioning sleeve for primary storage of cut trepans and collection of chips.