Saddle Piece Guided Cutting Device for Pipe Side Connections
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Solution Overview
Problem
Existing methods for creating side connections in main pipes, such as sewage pipes, are time-consuming, costly, and prone to leaks due to issues with circularity and ovality of pipe sections, leading to burrs and fluid flow disruptions.
Innovation Solution
A device with rolling and/or sliding elements supported along a quarter of the pipe section's circumference, guided by a cutting tool, allows for precise openings in main pipes with non-ideal circular cross-sections, ensuring fluid-tight connections and smooth transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drill bit is used to cut the opening in the pipe section, then the opening can be made, but the drill bit requires a perfectly circular cross-section or must be chosen smaller than the pipe cross-section, which limits adaptability to oval cross-sections
Solution Approach 1:
The patent changes the fundamental parameter of the cutting approach by replacing rotational cutting (drill bit) with linear cutting along a guided trajectory. The cutting tool moves linearly along a path defined by the pipe section wall, allowing the opening shape to adapt to the pipe's cross-section (circular or oval) without requiring the tool itself to match that shape. This resolves the contradiction by making the system adaptable to different cross-sections while maintaining precise opening geometry through trajectory control.
2Productivity
If traditional cutting methods are used to create side connections, then connections can be made, but the process is time-consuming and causes high costs
Solution Approach 1:
The patent applies preliminary action by first attaching a saddle piece to the main pipe and then using its pipe section as a guide for the cutting trajectory. This pre-positioned guide structure enables the cutting operation to proceed directly along the correct path without requiring time-consuming measurements, markings, or adjustments during the actual cutting process, thereby significantly reducing the total time required for creating side connections.
3Ease of manufacture
If a jigsaw or cutting tool is used after removing the saddle piece, then the opening can be made, but burrs are created that are expensive to rework and represent points for deposits and leaks
Solution Approach 1:
The patent substitutes the traditional jigsaw cutting mechanism with a cutting tool that follows a precisely defined trajectory guided by the saddle piece's pipe section. This guided linear cutting mechanism replaces the unguided oscillating blade of a jigsaw, resulting in a cleaner cut that produces minimal burrs. The substitution of the cutting mechanism itself, rather than just adding auxiliary features, directly addresses the reliability issue by eliminating the source of burr formation.
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 quick, cost-effective, and precise creation of side connections without burrs or flow impediments, adapting to oval cross-sections and ensuring fluid flow without deposits or blockages.
Implementation Method 1
a cutting tool (4) for opening the wall (2.1) of the main pipe (2)
Implementation Method 2
The device (5) can be moved along at least part of the circumference of the pipe section (3.1) with rolling and/or sliding elements (5.1)
Implementation Method 3
a saddle piece (3) fastened in a fluid-tight manner to the outer surface (2.3) of the main pipe (2)
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a device (1) for producing an opening (2.2) in the wall (2.1) of a main tube (2), wherein the wall (2.2) contains or consists of a polymer material, in the region of a saddle piece (3) fluid-tightly attached to the outer surface (2.3) of the main tube (2), which has a tube section (3.1) whose axis (3.1.1) forms an angle with the axis of the main tube (2.4), by means of a cutting tool (4) for opening the wall (2.1) of the main tube (2), which is guided by a device (5) whose path of movement through the wall (3.1.2) of the tube section (3.1) is predetermined at the saddle piece (3), in order to create a fluid connection between the main tube (2) and the tube section (3.1), which is characterized in that the device (5) is equipped with rolling and/or sliding elements (5.1) extending at most along approximately 1/4 of the circumference of the tube section. (3.1) on the inner (3.1.3) and/or outer surface (3.1.4) of the wall (3.1.2) of the pipe section (3.1) is supported and is movable along at least part of the circumference of the pipe section (3.1).