Pipe Opening Structure With Skin-Breaking Shaving Containment
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Solution Overview
Problem
Conventional methods for cutting pipes to form openings allow fine shavings to enter the pipe, leading to foreign matter and rust formation, which is not preventable.
Innovation Solution
A method and structure that form a bottomed groove with a thin skin on the pipe surface using a milling-shaped cutting tool, allowing shavings to be removed and preventing them from entering the pipe, and a gate valve body with a blade to break the skin and form an opening without producing new shavings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cutting tool is used to form an opening in the pipe, then the opening can be created, but fine shavings are produced and enter the pipe causing foreign matter and rust
Solution Approach 1:
The opening formation process is divided into two distinct stages: first forming a bottomed groove that stops before penetrating the pipe wall, then separately thrusting through the remaining skin. This segmentation prevents shavings from entering the pipe during the cutting phase, as the groove bottom acts as a containment barrier
Solution Approach 2:
The bottomed groove is formed in advance before the final penetration step. This preliminary action creates a controlled environment where shavings can be removed without risk of entering the pipe, and prepares the path for the subsequent clean thrusting operation
2Adaptability or versatility
If the pipe is cut to form an opening, then the gate valve body can be inserted, but the cutting process produces shavings that become foreign matter inside the water pipe
Solution Approach 1:
The process separates groove formation from pipe penetration, allowing shavings to be removed after groove formation but before final opening creation. This ensures the pipe interior remains clean while still enabling gate valve insertion through the subsequently formed opening
Solution Approach 2:
The bottomed groove acts as an intermediary structure that facilitates the overall process. It allows the cutting tool to remove material without directly exposing the pipe interior to shavings, serving as a protective intermediate stage
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
Prevents shavings from entering the pipe, reduces rust formation, and allows for the insertion of a gate valve body without disrupting the fluid flow, enhancing the reliability and reproducibility of the pipe opening process.
Implementation Method 1
a skin formation step of cutting an outer surface 13 of the pipe 1 with the cutting tool 3 arranged in the case 20, thereby forming a groove G on the pipe 1, the groove G having a bottom that is formed as a skin (a thin skin) 1S
Implementation Method 2
a valve rod 43 that brings the gate valve body 4 closer toward the groove G and further moves the gate valve body 4 so as to thrust through the skin 1S of the bottom of the groove G to form an opening 10
Data Source
AI summary
A piping structure and a process, with which it is possible to form an opening in a pipe while preventing shavings produced from cutting from entering the pipe. A process for forming an opening in a pipe, including: a step of enclosing the pipe with a case divided in a circumferential direction R of the pipe; a skin formation step of cutting an outer surface of the pipe with a cutting tool arranged in the case, thereby forming a bottomed groove, which is formed as a skin, on the pipe; a suction step of sucking shavings produced from cutting, together with a gas in the case in order to remove the shavings; and breaking the skin to form the opening after performing the skin formation step and the suction step.