Adjustable Pipe Stop for Precise Butt Welding Protrusion Setting

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Solution Overview

Problem

Existing pipe welding technologies fail to allow individual adjustment of pipe protrusions, leading to unnecessary material waste and inefficiency due to uniform removal of protrusions regardless of the specific requirements of the fittings.

Innovation Solution

A pipe stop with two adjustable stop discs and locking elements, allowing independent adjustment of pipe protrusions, which can be easily positioned and secured on a welding machine, enabling precise and efficient cutting of pipes to the desired length.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a rigid block is inserted between pipe ends to define axial position, then pipe protrusion length is standardized, but individual adjustment of pipe protrusion is impossible leading to material waste

Engineering Contradiction:
Improvepipe protrusion lengthVSAvoidpipe material
Core Design Contradiction:
Manufacturing precisionVSLoss of substance

Solution Approach 1:

The rigid block is segmented into a holder and two stop discs that can be independently adjusted. This segmentation allows each stop disc to be positioned separately to define precise pipe protrusion lengths for different pipes, eliminating the need to remove excessive material and reducing waste.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The stop discs are made adjustable along the axial direction of the holder, transforming the static rigid block into a dynamic system. The stop discs can be moved to different positions using adjusting elements, enabling individual customization of pipe protrusion lengths while maintaining manufacturing precision.

Inventive Principle:
Principle #15Dynamics

2Device complexity

If a rigid block is used to define pipe protrusion, then positioning is simple, but multiple clamping operations are required removing time

Engineering Contradiction:
Improvepositioning mechanismVSAvoidclamping time
Core Design Contradiction:
Device complexityVSLoss of time

Solution Approach 1:

The positioning mechanism is segmented into adjustable stop discs that can be set once for multiple pipes. This allows different pipe protrusion lengths to be defined without requiring multiple clamping operations, reducing time loss while maintaining simple positioning.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The stop discs are adjusted in advance to the required positions before pipe clamping. This preliminary action enables all necessary pipe protrusion definitions to be prepared beforehand, eliminating the need for repeated clamping and adjustment operations during the welding process.

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If stop discs are made axially adjustable, then individual pipe protrusion adjustment is enabled, but device complexity increases

Engineering Contradiction:
Improvepipe protrusion adjustmentVSAvoidadjusting mechanism
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The stop discs are designed with adjusting elements that enable axial movement along the holder. This dynamic capability provides adaptability for individual pipe protrusion adjustment while keeping the adjusting mechanism relatively simple through the use of threaded connections and locking elements.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The position of the stop discs along the axial direction is made variable through adjusting elements. By changing the axial position parameter of each stop disc independently, the system achieves high adaptability for different pipe protrusion requirements without requiring complex adjustment mechanisms.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP4467323B1Adjustable pipe stop
Publication Date: 2026.01.21 GEORG FISCHER ROHRLEITUNGSSYSTEME AG
  • EP4467323B1 patent drawingFigure 1~2
  • EP4467323B1 patent drawingFigure 3~4

AI summary

Pipe stop for adjusting pipe protrusions of pipes to be welded in a butt welding machine, comprising a base-forming holder, wherein the holder has a positioning element for attachment to a butt welding machine, wherein the pipe stop has two stop discs arranged on opposite sides of the holder, as well as adjusting elements for adjusting the stop discs and locking elements for locking the stop discs.