Equipment Module Junction Box Layout for Scaffold-Free Cable Connection
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Solution Overview
Problem
The existing methods for connecting cables to instruments in fluid handling plants require scaffolding installation and removal, which prolongs the construction period and complicates the cable connection process.
Innovation Solution
The junction box is positioned at the end portion of the equipment module frame, allowing for efficient cable connection without the need for scaffolding, with pre-connected secondary cables to instruments and external equipment, and using multi-core and single-core cables to minimize cable length and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cables are connected to instruments inside the equipment module frame, then power supply and signal exchange can be performed, but scaffolding installation and removal are required which prolongs construction period
Solution Approach 1:
The junction box is pre-installed at the end portion of the equipment module frame before equipment installation, with cable access points prepared in advance. This preliminary positioning eliminates the need for scaffolding during cable connection operations, as cables can be directly fed into the junction box from the exterior without requiring workers to access interior spaces.
2Ease of manufacture
If junction box is positioned inside the equipment module frame, then cable connection is possible, but cable installation becomes complex and time-consuming
Solution Approach 1:
The junction box is extracted from the interior space of the equipment module frame and repositioned to the end portion of the frame. This extraction moves the cable connection interface to the exterior, where cables can be directly connected without navigating through the complex interior arrangement of equipment and instruments, significantly simplifying the cable installation process.
3Adaptability or versatility
If multiple cables are routed to multiple instruments, then complete power supply and signal exchange is achieved, but cable length and weight increase
Solution Approach 1:
The cable system is segmented into two parts: a common multi-core cable that connects to the junction box at the frame end, and separate single-core cables that connect from the junction box to individual instruments. This segmentation allows the heavy multi-core cable to be positioned optimally at the frame end, while lighter single-core cables connect to distributed instruments, minimizing total cable weight and length.
Data Source
AI summary
A technique for connecting a cable to perform power supply or signal exchange with respect to an instrument provided in an equipment module for building a fluid handling plant. An equipment module configuring a plant where a fluid is handled includes: an equipment module frame where equipment configuring the plant and instruments are installed; and a junction box for relaying cables to perform power supply or signal exchange with respect to the plurality of instruments. The junction box includes a primary side connecting portion to which the first cable extending from a control room installed outside the equipment module frame is connected, and a secondary side connecting portion to which the second cable extending from the plurality of instruments is connected. The junction box is provided at an end portion in the equipment module frame such that the primary side connecting portion faces the outside of the equipment module frame.