Plastic Cap Anchor for Refractory Lining Thermal Expansion
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Solution Overview
Problem
Existing connections between reinforcement anchors and headed bolts in refractory linings, particularly in multi-layer systems, face challenges in providing a strong assembly during construction while allowing for thermal expansion during operation, with welded connections being unreliable and dependent on the welder's expertise.
Innovation Solution
A plastic cap surrounds the bolt head with an insertion gap for the bolt shank and a push-on connection cap that encases the U-shaped reinforcement anchor, providing a high-strength assembly that thermally decomposes at high temperatures to allow mobility, enhanced by a snap-in connection and optional hot-melt adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a welded connection is used to hold the waved anchor during assembly, then the anchor is held securely in position, but the connection becomes unreliable and dependent on welder expertise
Solution Approach 1:
A plastic cap serves as an intermediary component between the headed bolt and the reinforcement anchor. This cap provides a reliable connection during assembly that does not depend on welder expertise, while still allowing thermal movement during operation. The plastic cap mediates between the need for secure positioning and the need for thermal flexibility.
Solution Approach 2:
The plastic cap undergoes parameter changes (thermal decomposition or melting) at high temperatures during operation. This parameter change allows the connection to transition from a rigid state during assembly to a mobile state during thermal expansion, resolving the contradiction between secure holding and thermal movement capability.
2Strength
If a rigid screw connection is used, then the anchor is held securely during assembly, but mobility is prevented during thermal expansion
Solution Approach 1:
The connection system transitions from a static rigid connection to a dynamic system where the plastic cap can deform, decompose, or melt in response to thermal conditions. This dynamic behavior allows the connection to provide strength during assembly while adapting to allow thermal movement during operation.
Solution Approach 2:
The plastic cap utilizes phase transitions (thermal decomposition or melting) to change its physical state from solid and rigid during assembly to liquid or decomposed state during thermal expansion. This phase transition enables the connection to provide both strength and thermal movement capability at different operational stages.
3Stability of the object's composition
If a welded connection is used, then the anchor position is fixed, but the connection cannot accommodate thermal expansion movements
Solution Approach 1:
The plastic cap acts as a mediator that provides stable anchor positioning during assembly while inherently accommodating thermal expansion through its material properties and potential phase changes. This intermediary component resolves the contradiction between position stability and expansion adaptability.
Solution Approach 2:
The plastic cap's physical parameters (temperature, structural integrity) change during operation, allowing it to maintain position stability during assembly and then accommodate thermal expansion through decomposition or melting. This parameter change enables dual functionality in a single component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution creates a secure, easy-to-assemble connection that maintains the anchor's position during construction and allows thermal movement during operation, with improved reliability and reduced dependency on welder expertise.
Implementation Method 1
During the operation of the firing chamber, the plastic of the plastic cap is thermally decomposed or melted by the high temperature
Implementation Method 2
the plastic of the plastic cap is thermally decomposed or melted by the high temperature
Implementation Method 3
the interior of the plastic cap is at least partially filled with a hot-melt adhesive
Data Source
Figure 1~3
Figure 4~7
AI summary
The invention relates to a connection between a metal stud bolt attached to a wall or ceiling of a refractory lining and a reinforcement anchor consisting of a bent metal rod extending into the refractory concrete of the refractory lining, wherein at the connection point the reinforcement anchor engages the stud bolt in a U-shape below the stud head, wherein the connection point is encompassed by a sliding plastic cap which covers the stud head with a cover surface and has an insertion slot on the side opposite the cover surface through which the shaft of the stud bolt passes, and wherein inside the plastic cap lies a sliding plastic connecting cap which encompasses the U-shaped area of the reinforcement anchor and rests against the annular underside of the stud head.