Connecting Pipe Sleeve Cavity for Weld Slag Containment
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Solution Overview
Problem
Existing control valves face issues due to poor welding of connecting pipes, leading to weld beading and slag accumulation that obstruct normal operation.
Innovation Solution
A connecting pipe assembly with a first connecting pipe, connecting sleeve, and second connecting pipe, featuring a gap forming an accommodating cavity to house weld beading and slag, ensuring stable connection and preventing overflow into the valve body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to connect the connecting pipe to the valve body, then the connection strength is improved, but weld beading and welding slag are generated causing blockages
Solution Approach 1:
The connecting pipe is divided into a first connecting pipe, a connecting sleeve, and a second connecting pipe. The connecting sleeve acts as an intermediate component that segments the welding process, allowing weld defects to be contained in a dedicated accommodating cavity rather than directly in the valve body connection area.
Solution Approach 2:
The connecting sleeve serves as an intermediary component between the first and second connecting pipes. It provides an accommodating cavity that mediates the welding process by capturing weld beading and slag, preventing them from reaching the valve body while still achieving strong connections.
2Manufacturing precision
If multiple times of plug and pull welding are performed, then the welding quality is improved, but weld beading and welding slag accumulate causing blockages
Solution Approach 1:
The accommodating cavity in the connecting sleeve converts the harmful effect of weld beading and slag accumulation into a beneficial containment solution. Instead of allowing these byproducts to block the valve body, they are redirected into the cavity where they serve as a buffer that protects the critical flow path.
3Device complexity
If the connecting pipe structure is simplified, then the device complexity is reduced, but welding stability deteriorates leading to more weld defects
Solution Approach 1:
The connecting sleeve is nested within the connecting pipe assembly, with the first and second connecting pipes inserted into the sleeve. This nested structure allows the accommodating cavity to be integrated into the existing connecting pipe without adding significant external complexity, while still providing weld defect containment.
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
The solution enhances welding stability and prevents weld beading and slag from obstructing the control valve, ensuring normal operation and improved structural integrity.
Implementation Method 1
the gap forms an accommodating cavity... The accommodating cavity can accommodate the resulting weld beading, welding slag or excess solder when the connecting sleeve is welded with the second connecting pipe, thereby preventing the weld beading, welding slag or excess solder from flowing out of the weld joint
Data Source
AI summary
Provided is a connecting pipe assembly and a control valve assembly. The connecting pipe assembly includes a first connecting pipe, a connecting sleeve and a second connecting pipe; a first end of the first connecting pipe is disposed in the connecting sleeve, the connecting sleeve is provided with a first end and a second end opposite to each other, the first end of the connecting sleeve is connected with an outer side wall of the first connecting pipe, the inner wall of the middle part of the connecting sleeve and the outer wall of the first end of the first connecting pipe have a gap in between, the gap forms an accommodating cavity; and one end of the second connecting pipe is connected with the second end of the connecting sleeve, and an end of the second connecting pipe is disposed in the connecting sleeve.