Welding Torch Plug-Socket Connection for Leak-Tight Angular Adjustment
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Solution Overview
Problem
Existing connecting devices for gas-cooled welding torches often fail to provide a simple, cost-effective, and leak-proof connection that allows for easy angular adjustment and secure electrical transmission, while also being durable and easy to handle.
Innovation Solution
The design includes a plug part with a sealing ring and chamfered flange for optimal gas retention and electrical contact, a rotatable union nut for mechanical stability, and a socket part with crossed slots forming an expanding pliers mechanism for secure connection, along with a sliding ring for easy angular adjustment and a plastic covering for insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded connection with union nut is used to connect pipe bend to hose assembly, then mechanical stability and gas tightness are improved, but device complexity and handling difficulty increase
Solution Approach 1:
The connection device is divided into two separate parts: a plug part attached to the pipe bend and a socket part attached to the hose assembly. This segmentation allows each part to be optimized independently, simplifying the overall design while maintaining connection reliability through the threaded union nut mechanism.
2Reliability
If a threaded connection with union nut is used to connect pipe bend to hose assembly, then mechanical stability and gas tightness are improved, but ease of operation deteriorates
Solution Approach 1:
By separating the connection device into plug and socket parts with standardized threaded interfaces, the design enables tool-free assembly and disassembly. The union nut's external thread engages with the corresponding internal thread in a straightforward manner, improving ease of operation while maintaining connection reliability.
3Adaptability or versatility
If pipe bend is made rotatable on connection device, then adaptability and ease of operation are improved, but device complexity increases
Solution Approach 1:
The plug part is designed to be rotatable relative to the socket part through the threaded union nut connection, allowing the pipe bend to assume different angular positions. This dynamic capability provides adaptability for various welding angles while adding minimal complexity to the connection device structure.
4Reliability
If sealing ring is added to pipe element to prevent shielding gas escape, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
A sealing ring made of elastic material is introduced as an intermediary element between the plug part and socket part. This sealing ring prevents shielding gas escape through the connection interface, improving gas tightness and reliability while adding minimal manufacturing complexity through a simple elastomeric component.
5Reliability
If chamfer is provided on flange for optimal current transfer, then electrical conductivity is improved, but manufacturing precision requirements increase
Solution Approach 1:
A chamfer is provided on the flange of the plug part to optimize current transfer between the plug and socket. By carefully selecting the chamfer angle and dimensions, the design improves electrical conductivity and contact area while keeping manufacturing precision requirements within standard machining capabilities.
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 ensures a leak-proof, mechanically and electrically stable connection that allows for easy angular adjustment of the pipe bend, is cost-effective to produce, and provides thermal and electrical insulation, enhancing the usability and reliability of the welding torch.
Implementation Method 1
The sealing ring on the tube element, which can be made of a suitable elastic material such as silicone, prevents shielding gas from escaping from the axially running channel in the area of the connection between the plug and socket.
Implementation Method 2
a union nut (24) rotatably arranged on the pipe element (22), which has an internal thread for connection with a corresponding external thread on the socket part
Implementation Method 3
The rotating union nut on the tube element presses the plug firmly against the socket, creating an optimal mechanical and electrical connection.
Implementation Method 4
The chamfer on the flange of the plug's tube element ensures optimal current transfer between the plug and socket.
Implementation Method 5
a plastic covering for insulation
Implementation Method 6
provides thermal and electrical insulation
Data Source
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AI summary
The invention relates to a plug part (21) for detachably connecting a tube elbow (19) of a gas-cooled welding torch (7) to a socket part (34) disposed on a hose packet (20), comprising a cylindrical tube element (22) with a flange (25) and with an axially extending channel (23) for a welding wire (9) and for a protective gas (5) and comprising a coupling nut (24) which is rotatably disposed on the tube element (22) and which comprises an inner thread for connection to a corresponding outer thread on the socket part (34). The invention also relates to such a socket part (34). The aim of the invention is to produce an optimal connection between the tube elbow (19) and the hose packet (20). This is achieved in that a bevel (32) is disposed on the flange (25) of the tube element (22) of the plug part (21), and the end piece (35) of the socket part (34) has at least one axial slot (39).