Molten Metal Sampler Bushing for Accurate Carbon Readings
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Solution Overview
Problem
Conventional samplers for molten metal analysis require surface preparation to remove metal and non-metallic segregation, which is time-consuming and economically unfavorable. Additionally, samplers used in high oxygen applications face challenges with de-oxidant material distribution and glues/cements decomposing, leading to erroneous carbon readings.
Innovation Solution
The use of a sampler with a metal bushing that couples the inflow conduit to the sample chamber, eliminating the need for glues or cements. This design enhances mechanical stability, facilitates de-oxidant material distribution, and prevents bending of the inflow conduit, ensuring precise carbon readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sampling devices are used to obtain molten metal samples, then samples can be obtained for analysis, but surface preparation is required to remove metal and non-metallic segregation which is time-consuming and economically unfavorable
Solution Approach 1:
The sampler performs preliminary actions by ensuring proper de-oxidant distribution and creating optimal solidification conditions during the sampling process itself. The metal bushing design pre-prevents potential surface defects by maintaining mechanical stability and proper material distribution before the sample is even formed, eliminating the need for subsequent surface preparation.
Solution Approach 2:
The invention extracts and eliminates the harmful requirement for surface preparation by designing a sampling system that produces samples with inherently suitable surfaces. The metal bushing design removes the source of surface defects (improper de-oxidant distribution and mechanical instability) from the sampling process.
2Ease of manufacture
If glues or cements are used to couple the inflow conduit to the sample chamber, then assembly is simplified, but decomposition occurs leading to erroneous carbon readings
Solution Approach 1:
The metal bushing serves as an intermediary component between the inflow conduit and the sample chamber. It provides a stable, decomposition-resistant coupling mechanism that mechanically connects the components without using organic adhesives. The bushing transfers and distributes de-oxidant material while maintaining structural integrity throughout the sampling process.
Solution Approach 2:
The invention changes the material parameter of the coupling mechanism from organic (glue/cement) to metallic. This parameter change eliminates the decomposition issue while maintaining the coupling function. The metal bushing can withstand the high temperature and chemical environment without decomposing, ensuring accurate carbon readings.
3Device complexity
If the inflow conduit is not mechanically stabilized, then assembly is simpler, but bending occurs preventing precise carbon readings
Solution Approach 1:
The metal bushing acts as a stabilizing intermediary that prevents inflow conduit bending. By providing rigid support and proper positioning, the bushing maintains the conduit's straight alignment throughout the sampling process, ensuring that de-oxidant material is distributed correctly and carbon readings remain precise.
Solution Approach 2:
The coupling system uses a composite structure combining the inflow conduit with the metal bushing. This composite design provides both the flexibility needed for assembly and the mechanical stability required to prevent bending during operation. The metal bushing reinforces the conduit structure without significantly increasing overall complexity.
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 proposed solution eliminates the need for surface preparation, reduces analysis time, and provides accurate carbon readings by ensuring proper de-oxidant distribution and mechanical stability, thereby offering economic benefits and improved analytical precision.
Implementation Method 1
facilitates de-oxidant material distribution
Implementation Method 2
eliminates the need for surface preparation
Data Source
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AI summary
The present invention relates to a sampler for taking samples from a molten metal bath, particularly a molten steel bath, the sampler comprising: a carrier tube having an immersion end; a sample chamber assembly arranged on the immersion end of the carrier tube, the sample chamber assembly comprising a cover plate and a housing, wherein the housing comprises an immersion end having an opening; an inflow conduit having a first end for receiving molten metal and a second end, opposite the first end, wherein the second end is in communication with the opening, wherein the opening is configured to receive the molten metal from the inflow conduit; a measuring head, wherein the sample chamber and the second end of the inflow conduit are at least partly arranged in the measuring head; and a de-oxidant material arranged along a central axis of the inflow conduit, wherein at least part of the de-oxidant material is arranged near the second end of the inflow conduit inside the measuring head, and wherein the inflow conduit comprises first coupling means, arranged on the second end of the inflow conduit, wherein the de-oxidant material comprises second coupling means, to interact with the first coupling means on the inflow conduit to anchor the de-oxidant material in a position along the central axis of the inflow conduit. The invention also relates to a sampler for taking samples from a molten metal bath, particularly a molten steel bath, the sampler comprising: a carrier tube having an immersion end; a sample chamber assembly arranged on the immersion end of the carrier tube, the sample chamber assembly comprising a cover plate and a housing, wherein the housing comprises an immersion end having an opening; an inflow conduit having a first end for receiving molten metal and a second end, opposite the first end, wherein the second end is in communication with the opening, wherein the opening is configured to receive the molten metal from the inflow conduit; a measuring head, wherein the sample chamber and the second end of the inflow conduit are at least partly arranged in the measuring head; and a metal bushing, wherein the metal bushing coupling the inflow conduit to the sample chamber.