Fluid Tube Blocking Bag Expansion Without Guide Pipe Collision
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Solution Overview
Problem
Existing blocking devices for fluid tubes, such as those described in Patent Literature 1, face issues where pressure fluctuations can cause the blocking bag to collide with the guide member, potentially deforming it and making it non-storable.
Innovation Solution
The proposed blocking device includes a cylinder connectable to the fluid tube, a guide pipe with a notch for passing the bag, a slide tube connected to the bag and a fluid source, and a safety mechanism that allows fluid supply only when the guide pipe is withdrawn, ensuring the bag expands without colliding with the guide pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bag is expanded inside the fluid tube with the guide pipe in place, then the blocking function is achieved, but the bag may collide with the guide pipe causing deformation and making it non-storable
Solution Approach 1:
The guide pipe is withdrawn from the fluid tube before the bag is expanded. This preliminary action removes the guide pipe from the expansion zone, eliminating the risk of collision between the expanding bag and the guide pipe, thereby preventing deformation and ensuring the guide pipe remains storable for future use
Solution Approach 2:
The guide pipe is extracted from the fluid tube before the bag expansion process. By removing the guide pipe from the system at the appropriate timing, the harmful interaction between the expanding bag and the guide pipe is eliminated, while the blocking function is still achieved through the expanded bag
2Manufacturing precision
If the guide pipe is retained in the fluid tube during bag expansion, then the bag can be properly positioned, but the bag may collide with the guide pipe under pressure fluctuation
Solution Approach 1:
The guide pipe is withdrawn before bag expansion to prevent collision. The bag positioning is achieved through the notched portion of the guide pipe during the introduction phase, and then the guide pipe is removed before expansion occurs, eliminating the strength risk while maintaining positioning accuracy
3Productivity
If fluid supply to the slide tube is allowed during guide pipe retention, then the bag can be expanded, but the guide pipe may be deformed by the expanding bag
Solution Approach 1:
The guide pipe is withdrawn from the fluid tube before fluid is supplied to expand the bag. This sequencing ensures that the bag expansion occurs in the absence of the guide pipe, preventing deformation and ensuring the guide pipe remains reusable, while the blocking operation is still completed efficiently
Solution Approach 2:
The guide pipe is extracted from the fluid tube before the bag expansion process begins. This removal eliminates the risk of guide pipe deformation during expansion, ensuring reusability, while the blocking function is achieved through the expanded bag in the fluid tube
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
This configuration effectively prevents the bag from colliding with the guide pipe during pressure fluctuations, maintaining the guide pipe's integrity and allowing for safe and reliable blocking of fluid tubes.
Implementation Method 1
expands the bag by pressure of fluid to block the inside of the fluid tube
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
To provide a blocking device and method capable of safely blocking a fluid tube. A blocking device (1) that introduces a bag (50) into a fluid tube (1), and expands the bag (50) by pressure of fluid to block the inside of the fluid tube (50), the blocking device (1) including a cylinder (20) connectable to the fluid tube (1); a guide pipe (30) provided to be movable forward and backward in an axial direction of the cylinder (20) in the cylinder (20) and formed with a notch (32) for passing the bag (50) at a tip end; and a slide tube (40) inserted into the guide pipe (30) and provided to be movable forward and backward in the axial direction, and having a tip end portion connected to the bag (50) and a basal end portion connected to a fluid source (60) for expanding the bag (50); where the bag (50) is expanded in a state in which the guide pipe (30) is withdrawn from the fluid tube (1).