LNG Tank Insulation Wall Fixing Device
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Solution Overview
Problem
Existing insulation wall fixing devices for LNG storage tanks compromise the strength of the secondary insulation wall and cause burn damage due to welding, while also being labor-intensive and inefficient in installation.
Innovation Solution
An insulation wall fixing device with a base socket mounted on a groove of the secondary insulation wall, featuring a step-shaped lower end that supports the upper protective plate, and a stud with a vane for secure coupling to the primary insulation wall, allowing welding on the upper surface of the base socket to prevent burn damage and enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base socket is coupled to the upper protective plate through rivets or bonding after cutting, then the primary insulation wall can be secured to the secondary insulation wall, but the strength of the upper protective plate is reduced and burn damage occurs due to welding heat
Solution Approach 1:
The base socket serves as an intermediary component between the primary insulation wall and the secondary insulation wall. It is mounted on the groove of the secondary insulation wall and provides a platform for coupling, eliminating the need to cut the upper protective plate or apply welds directly to it. The stud with vane then connects the primary insulation wall to the base socket, achieving secure coupling without compromising the upper protective plate's strength.
2Ease of manufacture
If the upper protective plate is cut substantially to secure the base socket, then the base socket can be mounted on the secondary insulation wall, but the strength of the upper protective plate is significantly reduced
Solution Approach 1:
The groove for mounting the base socket is formed on the secondary insulation wall before the upper protective plate is installed or positioned. This preliminary preparation allows the base socket to be mounted on the groove without requiring any cutting of the upper protective plate, thereby maintaining the plate's full strength while still enabling easy installation of the base socket.
3Reliability
If welding is performed on the base socket to secure the secondary sealing wall, then secure coupling is achieved, but burn damage occurs to the upper protective plate due to welding heat
Solution Approach 1:
The base socket acts as a thermal barrier and intermediary structure that allows welding to be performed on its upper surface without transmitting the welding heat to the upper protective plate. The base socket absorbs and dissipates the welding heat, protecting the upper protective plate from burn damage while still achieving secure coupling of the secondary sealing wall.
4Reliability
If traditional fixing devices are used with substantial cutting and manual installation, then the primary insulation wall can be coupled to the secondary insulation wall, but labor intensity is high and productivity is low
Solution Approach 1:
The groove for the base socket is pre-formed on the secondary insulation wall, and the base socket is pre-positioned to provide a stable mounting platform. This preliminary preparation eliminates the need for on-site cutting and complex installation procedures, significantly reducing labor intensity and improving productivity while maintaining coupling reliability.
Solution Approach 2:
The fixing device is segmented into distinct functional components: the base socket mounted on the groove, the stud with vane for coupling to the primary insulation wall, and the lock nut for securing the connection. This segmentation allows for simplified assembly and disassembly, reducing installation complexity and improving productivity without compromising the reliability of the coupling.
Data Source
Figure 1(a)~1(c)
Figure 2
Figure 3~4
AI summary
An insulation wall fixing device for a liquefied natural gas storage tank is disclosed. The present invention relates to a fixing device for securing a primary insulation wall to a secondary insulation wall in a liquefied natural gas storage tank, the fixing device comprising a base socket mounted on a groove formed on an upper surface of a secondary insulator of the secondary insulation wall, wherein the base socket has a lower circumference protruding in a step shape such that a step portion of the base socket supports a lower surface of an upper protective plate of the secondary insulation wall.