Regulating Valve Locking Member with Bendable Tongue
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Solution Overview
Problem
Conventional regulating valves face challenges in component replacement, particularly when the valve body or stem is damaged, as the existing coupling structure requires precise alignment of through-holes, leading to increased costs and reduced engagement force due to the formation of through-holes in threaded regions.
Innovation Solution
A regulating valve design featuring a valve body with a female screw and chamfered portions, and a valve stem with separate male screws, utilizing a locking member with a bendable tongue portion that engages with the chamfered portions to prevent loosening, allowing for easy replacement of components without compromising engagement force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pin is inserted into a through-hole formed in the engagement portion by screwing between the valve stem and the valve body to prevent loosening, then the screwing is prevented from being loosened, but the entire engagement force is reduced by the amount equivalent to the area of the through-hole
Solution Approach 1:
A locking member with a tongue portion is introduced as an intermediary element between the valve stem and valve body. The tongue portion engages with chamfered portions on the outer wall of the cylindrical portion, providing a positive locking mechanism that prevents loosening without requiring a through-hole through the threaded engagement region, thereby maintaining full engagement force.
2Reliability
If through-holes are formed in the valve body and valve stem in the screwed region to insert a pin for locking, then the screwing is prevented from being loosened, but precise alignment of through-holes is required which complicates the replacement process
Solution Approach 1:
The locking function is extracted from the threaded engagement region by placing the locking member on the valve stem separately. The tongue portion of the locking member engages with chamfered portions on the valve body's cylindrical portion, which are easier to machine and align than through-holes in the threaded region, thereby simplifying the replacement process.
3Ease of operation
If the valve body and valve stem are replaced as one set to avoid alignment issues, then the replacement process is simplified, but the cost increases when the valve stem with bellows is damaged
Solution Approach 1:
The coupling structure is segmented into separate replaceable components: the valve body with its cylindrical portion and the valve stem with the locking member. The locking member can be easily attached or detached from the valve stem, allowing the valve body to be replaced independently of the expensive valve stem with bellows, thereby reducing replacement costs while maintaining ease of operation.
4Reliability
If a pin is inserted into through-holes to prevent loosening, then the screwing is locked, but the structure becomes more complex
Solution Approach 1:
The locking member is merged with the valve stem as a single component, eliminating the need for separate pins and through-holes. The tongue portion of the locking member integrates the locking function directly into the valve stem structure, simplifying the overall coupling structure while maintaining reliable locking.
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
Facilitates the replacement of individual components while maintaining the engagement force between the valve stem and valve body, reducing costs and simplifying the replacement process by eliminating the need for precise alignment of through-holes, and enhancing the locking mechanism's stability against temperature changes.
Implementation Method 1
the tongue portion (151) being bendable in a direction parallel to the axial line
Implementation Method 2
the valve body includes a female screw (112) having threads formed on an inner wall of the cylindrical portion... the valve stem includes a first male screw (120) having threads formed on a surface close to the other end of the valve stem, the threads corresponding to the female screw
Data Source
AI summary
A regulating valve includes a valve body having a cylindrical portion, a valve stem, and a locking member. The valve body includes a female screw formed on the inner wall of the cylindrical portion and at least one chamfered portion formed on the outer wall of the cylindrical portion. The valve stem includes a first male screw and a second male screw formed on the surface close to the other end of the valve stem. The locking member includes a nut corresponding to the second male screw and a tongue portion formed integrally with the nut, extends in a direction orthogonal to an axial line S from one end portion of the nut, and is bendable in the direction parallel to the axial line.