Adjustable Guide Mechanism for Reactor Vessel Fastening
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Solution Overview
Problem
The existing fastening and loosening devices for reactor vessel covers require custom designs for each reactor size and shape, leading to increased costs due to the need for different guide devices and positioning systems, as they must be specifically positioned and aligned with stud bolts and nuts along the reactor vessel's outer peripheral flange.
Innovation Solution
A fastening and loosening device with a movable device main body, guided by right and left guide members that can be adjusted horizontally and positioned by an eccentric mechanism, allowing proper alignment and positioning regardless of the reactor vessel's size and shape, and including a positioning device for accurate placement between adjacent nuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a guide device is designed for each reactor vessel size and shape, then proper positioning and alignment of the fastening and loosening device is achieved, but facility costs increase due to the need for multiple custom devices
Solution Approach 1:
The guide device incorporates movable guide members that can be adjusted horizontally to adapt to different reactor vessel sizes and shapes. The guide members are positioned on movable bases that allow horizontal displacement, enabling the same guide device to properly align with stud bolts and nuts across various reactor configurations without requiring multiple custom-designed devices.
Solution Approach 2:
The guide device allows changing of geometric parameters (horizontal position of guide members) to match different reactor vessel dimensions. By adjusting the horizontal position of guide members relative to the device main body, the system adapts to varying reactor sizes and shapes, maintaining positioning accuracy without requiring separate devices for each configuration.
2Adaptability or versatility
If the guide device is made adjustable to fit different reactor sizes, then device versatility improves, but device complexity increases
Solution Approach 1:
The guide device is divided into independent movable guide members that can be adjusted separately. Each guide member is mounted on its own movable base, allowing individual adjustment without affecting other parts of the device. This segmentation simplifies the adjustment mechanism compared to a fully integrated complex system.
Solution Approach 2:
The guide members are designed with movable bases that enable simple horizontal displacement. This dynamic capability allows the guide device to adapt to different reactor configurations through straightforward mechanical movement rather than complex reconfiguration mechanisms, balancing versatility with structural simplicity.
Data Source
AI summary
A fastening and loosening device is provided with a device main body (101) having an upper portion supported along an arrangement direction of stud bolts (65) in a freely movable manner by a conveyance device (73), a bolt tensioner (102) freely ascendable/descendable with respect to the stud bolts (65) together with the device main body (101) by a lift device (74), a guide device (103) coupled with the device main body (101) in a freely relatively movable manner via a cylinder (121) and having right and left guide members (123 and 124) contactable with an outer periphery of a nut (66) from both the right and left sides of a moving direction of the device main body (101), and a guide position adjustment device (105) capable of moving an inner guide member (123) in a horizontal direction intersecting with the moving direction of the device main body (101).