Double-Pipe Cutter with Inner Tube Protection and Length Measurement
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Solution Overview
Problem
Existing pipe cutters are not effective in safely cutting the outer pipe of a double pipe structure used in semiconductor manufacturing, as they often risk damaging the inner pipe during the cutting process.
Innovation Solution
A cutter apparatus with a hand-grippable main body, a cylindrical protection member for the inner tube, and a cutter member with a blade that can be rotated and extended to safely cut the outer tube, along with a tube fixing member to secure the double pipe before cutting, and a transparent outer cover for measuring the cut length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an existing pipe cutter is used to cut the outer pipe of a double pipe structure, then the cutting operation can be performed, but the inner pipe may be damaged during the cutting process
Solution Approach 1:
The cutter apparatus is divided into distinct functional segments: a protection member that isolates the inner pipe, a cutter member with blade for cutting the outer pipe, and a main body for operation. This segmentation allows the cutting function to be separated from the inner pipe, enabling safe cutting without damaging the inner pipe.
Solution Approach 2:
The protection member acts as an intermediary between the cutter blade and the inner pipe. It is positioned to contact and protect the inner pipe while the blade cuts the outer pipe, preventing direct contact between the blade and inner pipe thus avoiding damage.
2Reliability
If a protection member is added to isolate the inner pipe, then the inner pipe is protected from damage, but the device complexity increases
Solution Approach 1:
The protection member and cutter member are combined into a single integrated apparatus that operates together. The protection member is positioned around the inner pipe while the cutter member with blade is positioned to cut the outer pipe, and both functions are merged into one device that can be operated simultaneously.
Solution Approach 2:
The cutter apparatus is designed to perform multiple functions: the protection member protects the inner pipe, the cutter member cuts the outer pipe, and the main body provides operational control. This multi-functionality allows a single device to handle both protection and cutting operations without requiring separate tools.
3Ease of operation
If the blade is folded on the protection member, then the device becomes more compact and safer, but the cutting action becomes more complex
Solution Approach 1:
The blade is designed to be movable rather than fixed, allowing it to be folded onto the protection member when not in use and extended when cutting is required. This dynamic configuration enables the blade to transition between a compact safe state and an extended cutting state, improving both safety and compactness.
Data Source
AI summary
Disclosed is a cutter apparatus for a double tube for cutting an outer tube in a double pipe including an inner tube and the outer tube, the cutter apparatus for the double tube including: a main body which is grippable by a hand of an operator; a cylindrical protection member which is connected to the main body and into which the inner tube is inserted; and a cutter member including a blade for cutting the outer tube.