Pipe Connecting Device Using Compression Fitting and Plate Spring
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Solution Overview
Problem
Existing pipe connecting methods face issues with pipe deformation, require specialized tools, and struggle to maintain consistent fluid flow due to structural limitations and sediment deposition, especially in pipes made of thin materials like stainless steel or copper.
Innovation Solution
A pipe connecting device featuring a cylindrical first connecting member with a spring seating portion and screw recesses, coupled with a second connecting member having an o-ring seating portion and screw threads, which uses a catching ledge and o-ring to securely connect pipes without deformation, suitable for use by inexperienced technicians without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding method is used to connect pipes, then connection strength is improved, but specialized welder is needed and thermal deformation occurs
Solution Approach 1:
The patent replaces the welding process (thermal/chemical system) with a mechanical compression system using a compression fitting device. The device applies radial compression force through a compression ring to create a mechanical interference fit between the pipe and fitting, eliminating the need for specialized welding equipment and operators while avoiding thermal deformation of the pipe material.
2Ease of manufacture
If expansion molding method is used with packing and nut, then connection is achieved, but pipe deformation occurs and sediment is deposited
Solution Approach 1:
The patent extracts and eliminates the problematic packing material and nut components from the connection system. Instead, it uses a self-contained compression fitting device with an integrated compression ring that directly compresses the pipe end against the fitting body, removing the elements that cause pipe deformation and sediment deposition while maintaining ease of installation.
Solution Approach 2:
The patent employs a disposable compression ring that is deformed during the compression process to create the connection. This single-use component absorbs the deformation stress, protecting the pipe from permanent deformation while maintaining a smooth internal surface that prevents sediment accumulation.
3Ease of manufacture
If compression method with separate compressing tool is used, then connection is achieved, but pipe deformation occurs
Solution Approach 1:
The patent merges the compression ring, compression mechanism, and fitting body into a single integrated compression fitting device. This unified structure ensures that the compression force is applied uniformly and controllably during installation, preventing excessive or uneven compression that would cause pipe deformation, while still achieving a secure mechanical connection.
4Device complexity
If recessed portions are formed in pipes for connection, then connection structure is achieved, but pipe deformation occurs and fluid flow cannot be constantly maintained
Solution Approach 1:
Instead of forming recessed portions in the pipe (which weakens the pipe wall and causes deformation), the patent inverts the approach by creating a protruding compression ring on the fitting that compresses the pipe end externally. This maintains the pipe's original shape and structural integrity while achieving a secure mechanical connection, and the smooth internal surface prevents sediment accumulation that would affect fluid flow.
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 solution effectively prevents pipe deformation, ensures reliable connections, maintains fluid flow, and simplifies the connection process, particularly for pipes prone to deformation, such as those made of stainless steel or copper, while eliminating the need for specialized tools or workspaces.
Implementation Method 1
a spring seating portion on which a circular plate spring is seated
Implementation Method 2
an o-ring seating portion on which an o-ring is seated at a side at which the pipe is coupled
Data Source
AI summary
A pipe connecting device configured to connect at least two pipes, comprises a pipe including a catching ledge at a connecting end portion thereof and made of stainless steel or copper; a first connecting member formed in a cylindrical shape and having a spring seating portion on which a circular plate spring is seated, a pipe through-hole through which the pipe passes, and a screw recess provided inside the first connecting member; and a second connecting member provided with an o-ring seating portion on which an o-ring is seated at a side at which the pipe is coupled and an outer surface having a screw thread, wherein a through-portion having the same inner diameter as the pipe is formed in the second connecting member.