Segmented Pipe Fence Posts With Tangential Welding Slots
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Solution Overview
Problem
Traditional metal pipe fence construction methods are inefficient due to the need for drilling holes, precise post placement, extensive welding, and lack of protection against rust and corrosion, with high costs and error-prone alignment.
Innovation Solution
A fence system using metal pipe posts with tangentially extending slots and eyelet structures for easy alignment and connection, allowing for adjustable vertical height without welding, and pretreated metal components for enhanced corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional drilling and welding methods are used for fence construction, then structural strength is achieved, but construction time and complexity increase significantly
Solution Approach 1:
The fence post is divided into multiple segments (lower post segment and upper post segment) that can be assembled separately and then connected. This segmentation allows for pre-treatment of individual segments and simplifies the assembly process, reducing on-site construction time while maintaining structural integrity through the connection mechanisms described in the patent.
Solution Approach 2:
The lower post segment is pre-treated with rust-inhibiting material before assembly. This preliminary action ensures corrosion protection is applied to critical surfaces before the segment is installed and connected to other components, eliminating the need for post-construction painting or treatment while preserving structural strength.
2Manufacturing precision
If precise hole drilling and post spacing are required, then proper alignment is achieved, but positioning accuracy becomes difficult to maintain
Solution Approach 1:
The invention introduces a horizontal adjustment dimension by allowing the upper post segment to be positioned at different horizontal locations relative to the lower post segment within the opening. This dimensional freedom enables easy adjustment and repositioning without requiring precise initial hole drilling, while the connection structure maintains proper vertical alignment.
Solution Approach 2:
The opening in the lower post segment has dimensions that are intentionally larger than the upper post segment, creating a dimensional parameter difference that allows for adjustment. This parameter change enables the upper segment to be freely positioned and adjusted horizontally while maintaining vertical connection, simplifying the alignment process.
3Strength
If extensive welding is performed to attach rails to posts, then structural integrity is maintained, but corrosion protection is compromised
Solution Approach 1:
The invention extracts the welding operation from the rail-to-post connection process. Instead of welding rails to posts, the patent uses mechanical connection methods where rails are inserted through openings in the post segments and secured with fasteners. This extraction eliminates the harmful thermal effects of welding that compromise corrosion protection while maintaining structural integrity through the mechanical connection system.
Solution Approach 2:
The connection system uses separate, replaceable components (fasteners, brackets, or mechanical connectors) rather than permanent welded joints. These components can be individually replaced or treated for corrosion without affecting the entire structure, and the lower post segment's pre-applied rust-inhibiting material provides durable protection at the critical ground-contact interface.
4Shape
If painting is applied after construction, then aesthetic appearance is achieved, but additional time and cost are incurred
Solution Approach 1:
The lower post segment is pre-treated with rust-inhibiting material during manufacturing before delivery to the construction site. This preliminary protective action eliminates or significantly reduces the need for post-construction painting, saving time and cost while providing effective corrosion protection at the most critical area where the post contacts the ground and moisture.
Data Source
AI summary
A metal pipe fence and method of construction in which the posts of the fence are formed of lower pipe segments, which can be driven into the ground, and upper pipe segments installed on the lower pipe segments. The upper pipe segment is temporarily retained on the lower pipe segment for welding using a wedge piece driven through an eyelet which projects from the upper pipe segment such that the wedge piece is urged into a tangential slot formed through the wall of the upper pipe segment and into gripping contact with the lower pipe segment. The rails of the fence are preferably formed by connecting lengths of metal pipe or tubing end-to-end, without welding, so that the continuous series of connected pipe or tubing segments extends through rail openings provided through the upper pipe segments of the fence posts.