Butterfly Valve Insertion Through Grooved Pipe Openings
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Solution Overview
Problem
Conventional techniques for inserting a butterfly valve into a pipeline disrupt flow and compromise water-stopping capacity due to difficulties in valve insertion and rubber adhesion issues.
Innovation Solution
A piping structure with a butterfly valve featuring a groove-shaped opening, a valve rod, and a butterfly-shaped valve element with seal portions that separate during insertion and seal during closure, along with a press tool to compress rubbers for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner lid fits directly into a straight-line-shaped cut groove, then the valve insertion becomes difficult, but if there is a gap between the cut groove and the inner lid, then fluid leakage occurs when the valve is closed
Solution Approach 1:
The inner lid is divided into a lid body and separate seal portions (upper rubber and lower rubber) that can independently deform. This segmentation allows the seal portions to elastically adapt to the groove shape during insertion while maintaining contact for sealing when closed, resolving the contradiction between insertion ease and sealing reliability.
Solution Approach 2:
The seal portions are designed with elastic properties that allow their shape and position to change during insertion. When inserted, the seal portions deform to fit the groove; when the valve closes, they return to their original position to ensure sealing. This dynamic parameter change enables both easy insertion and reliable water stopping.
2Reliability
If the seal portions are in contact with the end faces during insertion, then sealing is achieved, but insertion becomes difficult
Solution Approach 1:
The seal portions are designed to dynamically change their contact state with the end faces during insertion. During insertion, the seal portions are positioned away from the end faces to facilitate easy insertion. After insertion, when the valve closes, the seal portions contact the end faces to achieve sealing. This dynamic behavior resolves the contradiction between insertion ease and sealing reliability.
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
Facilitates smooth valve insertion and improves water-stopping capacity by ensuring proper sealing and reducing rotation torque.
Implementation Method 1
the seal portions R22 are in a sealed state so as to seal between an inner surface 31 of the inner lid 3 and the seal portions R22 and seal between each end face 11f and the corresponding seal portion R22
Data Source
AI summary
A process including: an assembly step of assembling a sealed case onto an existing pipe; a cutting step of forming a first opening of a groove shape elongated in a pipe axis direction of the existing pipe; a second boring step of forming a circular second opening at a position of the existing pipe that opposes the first opening; and an insertion step of inserting, in a valve-open state, a butterfly-shaped valve element that is integral with a valve rod, which runs through the first and second openings, into the existing pipe 1 through the first opening until a tip portion of the valve rod protrudes from the second opening.