Rotary Brush Pipe Coating Removal Device
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Solution Overview
Problem
Existing decoating devices for pipes lack the ability to adjust removal elements effectively, leading to inefficient coating removal and potential weakening of the pipe wall due to machining errors and non-uniform coating removal.
Innovation Solution
A decoating device with rotatable removal elements mounted on a driven rotary disc within a housing, allowing for both axial and longitudinal rotation, and an adjustable mechanism using a sleeve and conical rollers for radial adjustment, ensuring effective coating removal around the entire pipe circumference while minimizing material loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If machining with cutting edge is used to remove coating, then coating removal is achieved, but small grooves or notches are formed affecting pipe strength
Solution Approach 1:
The patent replaces the mechanical cutting system with a rotational brush system that uses friction and abrasion to remove coating. The brushes rotate against the pipe surface, gradually wearing away the coating through friction rather than cutting, thus avoiding grooves and notches that would compromise pipe strength.
Solution Approach 2:
The patent changes the removal mechanism from cutting (high force, discrete removal) to friction-based abrasion (distributed force, gradual removal). By changing the physical parameter of the removal action from cutting edge contact to rotational brush friction, the process removes coating without creating stress-concentrating defects.
2Ease of manufacture
If turning or machining is used to remove coating, then coating is removed, but additional pipe material is removed weakening the pipe wall
Solution Approach 1:
The patent applies local quality by using brushes that contact only the coating layer on the pipe surface. The rotational brushes are designed to engage with the outer coating while the pipe wall remains protected. This localized action ensures that material removal is confined to the coating layer only, preserving the integrity and thickness of the pipe wall.
3Device complexity
If fixed removal elements are used in oblong holes, then structure is simple, but adjustment to changing pipe diameter during operation is not possible
Solution Approach 1:
The patent transforms the static, fixed-position removal elements into a dynamic system where the rotary disc and brushes can rotate around the pipe. This dynamic configuration allows the removal elements to adapt to different pipe diameters by adjusting their rotational path and contact pressure, enabling the device to handle varying pipe sizes without requiring complex adjustable mechanisms.
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
Enables efficient and material-friendly coating removal across the entire pipe circumference, allowing for precise adjustment of removal elements to maintain pipe strength and facilitate seamless integration with other processing steps in a tube processing plant.
Implementation Method 1
a plurality of removal elements, in particular in the form of a brush, are arranged in a housing (3) such that they can rotate both around their own longitudinal axis (6, 7) and around a central axis (8) of a tube (2) arranged inside the housing (3)
Implementation Method 2
The removal elements rotating around their longitudinal axis are moved around the pipe so that the coating can be removed around the entire circumference of the pipe
Data Source
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AI summary
The invention relates to a coating removal device (1) for removing a coating from a pipe (2) comprising a housing (3) and at least one removal element (4), which is rotatably mounted on a turntable (11) within the housing (3) and driven by a motor (9), both about its own longitudinal axis (6) and about a central axis (8) of the pipe (2) arranged within the housing (3), and offset parallel to the axis of rotation of the turntable (11). According to the invention, the motor (9) is configured to drive the turntable (11) via a gearbox (22, 32) and also to drive the at least one removal element (4) to rotate about its longitudinal axis (6).