Pit Can Unit Anchor Bolt Positioning for Pump Installation
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Solution Overview
Problem
The existing installation method for equipment like vertical pumps in atomic power plants is inefficient due to the difficulty in placing reinforcing steels around the pit can without interfering with anchor bolts, which complicates the installation process.
Innovation Solution
The method involves integrating a first frame, pit container, reinforcing steels, and an anchor member supporting mechanism before installation, allowing the pit container unit to be placed on a base with the anchor bolt unit positioned on the supporting mechanism, using a template to correct the foundation bolt positions, and embedding the unit in concrete to simplify the placement of reinforcing steels and anchor bolts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If anchor bolts are attached at the periphery of the pit can main body when the pit can module is manufactured, then the equipment installation can be performed, but the reinforcing steels cannot be placed without interference with the anchor bolts
Solution Approach 1:
The patent applies preliminary action by attaching the reinforcing steels to the first frame before attaching the anchor bolts to the pit can main body. This sequential arrangement allows the reinforcing steels to be placed without interfering with the anchor bolt attachment process, thereby resolving the contradiction between equipment installation capability and reinforcing steel placement ease.
2Productivity
If the reinforcing steels are attached at the periphery of the pit can main body after anchor bolts are attached, then the equipment can be installed, but the working efficiency is reduced due to difficult work to place reinforcing steels
Solution Approach 1:
The patent implements preliminary action by performing the reinforcing steel attachment to the first frame before the anchor bolt attachment to the pit can main body. This reversed sequence eliminates the interference between anchor bolts and reinforcing steels, significantly improving working efficiency and reducing placement difficulty during the installation process.
3Adaptability or versatility
If the pit can module is manufactured with anchor bolts and reinforcing steels attached, then the equipment can be installed, but the component layout becomes complex requiring careful avoidance of interference
Solution Approach 1:
The patent applies segmentation by separating the attachment processes into distinct stages: first attaching reinforcing steels to the first frame, then attaching anchor bolts to the pit can main body. This segmentation of the installation process simplifies the component layout by eliminating interference between different components, making the overall system more adaptable and easier to manage.
Data Source
AI summary
Efficiency of installation work of equipment such as an ECCS pump is enhanced. In an installation method of equipment, a pit can unit in which an upper side frame, a pit can, various reinforcing steels including vertical reinforcing bars reinforcing the above from a periphery, and an anchor plate supporting mechanism are integrated is manufactured in advance, and the pit can unit is placed on an MMR via a lower side frame. Further, an anchor bolt unit is disposed on the anchor plate supporting mechanism after primary concrete is deposited, a relative positional relationship of respective foundation bolts relative to the pit can is corrected by using a template, and secondary concrete is deposited under the state in which the positional relationship is corrected. After that, the ECCS pump is carried into the pit can, and an installation of the ECCS pump is completed by fixing the carried ECCS pump through the respective foundation bolts of which bottom sides are embedded.