Valve Tapping Fitting Locking Mechanism
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Solution Overview
Problem
Existing valve tapping fittings face manufacturing complexity and cost due to numerous small parts, and they have an undesirably large height to ensure sufficient flow, leading to reliability and durability issues.
Innovation Solution
A valve tapping fitting design with a housing, a valve body having an external thread for axial displacement, and a securing element with an opposite direction of rotation thread to prevent unintentional unscrewing, combined with a sealing ring and a robust cutting tool insert, reduces complexity and ensures secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drive spindle with an intermediate sleeve is used for torque transmission, then the valve body can be securely coupled to the drive mechanism, but the construction becomes complex and manufacturing costs increase
Solution Approach 1:
The patent combines the drive spindle and valve body into a more integrated structure. The drive spindle features a polygonal contour that directly engages with a corresponding recess in the valve body, eliminating the need for separate intermediate sleeves while maintaining secure torque transmission. This merging of components reduces the number of parts and simplifies the overall construction.
2Ease of operation
If the valve body is made axially displaceable via external thread engagement, then the valve can be easily operated, but the valve body requires a large axial extent to achieve sufficient opening position
Solution Approach 1:
The patent transitions from purely axial displacement to a combination of rotational and limited axial movement. The valve body is rotated about the longitudinal axis to open and close, with axial displacement being minimal or eliminated. This dimensional change in the operating mechanism allows sufficient opening position to be achieved through rotation rather than axial travel, thereby reducing the valve body's axial extent.
3Reliability
If a locking element with opposite direction thread is used, then unintentional unscrewing is prevented, but the assembly complexity increases
Solution Approach 1:
The locking element utilizes the rotational movement of the valve body during normal operation to automatically engage and lock itself. As the valve body rotates, the opposite direction thread on the locking element causes it to be screwed into the housing, securing the valve body in place. This self-locking mechanism requires no additional actuators or complex control systems, achieving reliability through the valve's own operational movements.
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 design enhances operational reliability by preventing unintended fluid leakage and reduces manufacturing complexity and height, while maintaining robustness and ease of assembly.
Implementation Method 1
a valve body (10) with a cutting tool (13), wherein the valve body (10) is axially displaceable in the main section (3) of the housing (2) by means of an external thread (11) attached to the valve body (10) and engaging with the housing (2)
Implementation Method 2
A valve tapping fitting design with a housing, a valve body having an external thread for axial displacement, and a securing element with an opposite direction of rotation thread to prevent unintentional unscrewing
Data Source
Figure 1
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AI summary
The invention relates to a valve tapping fitting (1) for mounting on a pipe (4), the valve tapping fitting (1) comprising: a housing (2) having a main section (3) with a head area (5) and a pipe mounting area (6), as well as a branch section (7) for a medium exiting from the drilled pipe (4); a valve body (10) with a cutting tool (13), wherein the valve body (10) is arranged in the main section (3) of the housing (2) in a manner axially displaceable in the direction by means of an external thread (11) attached to the valve body (10) and engaging with the housing (2), wherein the valve body (10) has a torque application point (21) by means of which it can be coupled to a rotary tool to initiate a rotary movement.Furthermore, a locking element (24) is provided, which is arranged in the head area (5) of the main section (3) of the housing (2) and is designed as a mechanical stop for the valve body (10) to prevent the valve body (10) from being unscrewed from the housing (2).