Composite Conveying Pipe Joint for Wear-Resistant Bending
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Solution Overview
Problem
Pneumatic conveying systems face challenges with wear resistance and flexibility in long-distance conveying of solid materials, particularly with large diameter plastic or plastic composite pipes, where thermal treatment is limited and angular changes are difficult to achieve without compromising the pipe's functionality.
Innovation Solution
A pipe arrangement combining a metal reinforcement part with a tubular plastic composite layer, where the plastic layer is warmed and shrinks over the metal reinforcement, allowing for easy connection and bending, including the use of a flexible connection piece with protrusions and recesses to facilitate angular changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal pipes are used for long-distance pneumatic conveying, then wear resistance is improved, but cost and weight increase significantly
Solution Approach 1:
The patent employs a composite pipe structure consisting of a plastic pipe body with an embedded metal reinforcement element (such as a metal spiral or metal layer). This composite construction provides the wear resistance of metal in critical areas while maintaining the lightweight advantage of plastic for the overall pipe structure, thus resolving the contradiction between wear resistance and weight.
2Weight of stationary object
If plastic pipes are used to reduce cost and weight, then ease of installation is improved, but wear resistance deteriorates
Solution Approach 1:
The plastic pipe is reinforced with a metal element (spiral, layer, or other configuration) that provides enhanced wear resistance at the inner surface where material contact occurs, while the outer plastic structure maintains lightweight properties and ease of installation.
Solution Approach 2:
The metal reinforcement is strategically positioned at the inner surface of the pipe where wear resistance is most needed, rather than making the entire pipe heavy. This localized reinforcement provides wear protection only where required, maintaining the lightweight advantage of plastic elsewhere.
3Ease of operation
If thermal treatment is applied to plastic pipes for bending, then flexibility is improved, but the risk of pipe folding and flow orifice deformation increases
Solution Approach 1:
A mandrel or support tool is used as an intermediary during the bending process to maintain the pipe's cross-sectional shape and prevent folding or deformation of the flow orifice. This intermediary support allows thermal treatment and bending to proceed safely without compromising structural integrity.
Solution Approach 2:
The pipe is prepared with appropriate support structures or mandrels in place before thermal treatment begins, ensuring that the flow orifice maintains its shape throughout the heating and bending process. This preliminary preparation prevents deformation before it can occur.
4Strength
If rigid reinforced pipes are used, then structural strength is improved, but adaptability to angular changes deteriorates
Solution Approach 1:
The pipe system incorporates sections with different rigidity characteristics, allowing rigid sections to provide structural strength where needed while more flexible sections enable angular changes and adaptations to different installation configurations. The metal reinforcement can be configured to provide strength in straight sections while allowing controlled flexibility at connection points.
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 solution enhances wear resistance and flexibility, enabling the pipes to be easily bent and connected, maintaining functionality even in large diameter systems, while minimizing wear and ensuring smooth material transport.
Implementation Method 1
the plastic layer is warmed and shrinks over the metal reinforcement
Data Source
AI summary
A connection piece for pipe connections, which connection piece comprises a tubular envelope having a first end and a second end, which connection piece comprises a channel between the first end and the second end, the channel being delimited by an inner surface of the envelope of the connection piece, which connection piece comprises a first connection area extending to a distance from the first end and a second connection area extending from the second end to a distance, which connection piece has been configured to be bent in a first plane, such as vertical plane, by an angle alpha (α) which is 0-20 degrees, and/or in a second plane, such as horizontal plane, by an angle beta (β) which is 0-20 degrees. The invention also relates to a conveying pipe arrangement and to a method.