Line Blind Valve Threaded Moving Pipe Sealing Mechanism
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Solution Overview
Problem
Conventional line blind valves have complex structures that increase manufacturing costs and require intricate sealing mechanisms, making them difficult to operate and maintain.
Innovation Solution
A line blind valve design featuring a valve body with a fixed and moving pipe, where the moving pipe with threaded surfaces is driven by a gear set and drive unit to seal or open the pipeline by moving into or away from the blind, eliminating the need for additional sealing sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring sheet is used to seal the blind plate by pressing it against the valve body, then sealing is achieved, but the structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The invention extracts and eliminates the ring sheet component from the sealing mechanism. Instead of using a separate ring sheet to press against the blind plate, the moving pipe itself performs the sealing function by directly contacting the blind plate through its threaded outer circumferential surface, thereby simplifying the overall structure while maintaining sealing capability
Solution Approach 2:
The moving pipe is designed to serve multiple functions: it provides structural support, enables movement through threading engagement with the gear set, and performs sealing by contacting the blind plate. This multi-functionality eliminates the need for dedicated sealing components like the ring sheet, reducing device complexity
2Reliability
If a ring sheet is configured to move to the outer circumferential surface of the rear sheet for mutual sealing, then sealing is ensured, but coupling and configuration become complex
Solution Approach 1:
The invention merges the sealing function with the moving pipe structure itself. The threaded outer circumferential surface of the moving pipe integrates both mechanical engagement (with the gear set) and sealing contact (with the blind plate) functions into a single component, eliminating the need for separate coupling mechanisms and simplifying assembly
3Reliability
If the gear unit operates to push the blind plate toward the front sheet for sealing, then sealing is achieved, but manufacturing cost increases due to variety of components
Solution Approach 1:
The invention extracts and removes the ring sheet component from the system. The moving pipe with its threaded surface directly engages with the gear set and contacts the blind plate for sealing, eliminating the need for additional sealing components and reducing the variety of parts that need to be manufactured and assembled
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 design simplifies the structure and operation of the blind valve, reducing manufacturing costs and enabling easy sealing and opening of the pipeline with a straightforward mechanism.
Implementation Method 1
a gear set engaged with the threads of the moving pipe and configured to press the moving pipe toward the blind by a rotation thereof
Implementation Method 2
a gear set engaged with the threads of the moving pipe and configured to press the moving pipe toward the blind by a rotation thereof
Data Source
AI summary
A line blind valve includes: a valve body formed with an opening at each of a front side and a rear side thereof; a fixed pipe fixedly provided on the front side to be in a shape inserted in the opening of the front side; a moving pipe provided on the rear side by being inserted into the opening of the rear side, and movable in a direction of a pipeline, with threads formed on an outer circumferential surface thereof; a blind provided between the fixed pipe and the moving pipe to open or block the pipeline by moving upward or downward; and a drive assembly including a gear set engaged with the threads and configured to press the moving pipe toward the blind to sealingly fix the moving pipe, and a drive unit coupled to the gear set to control a rotation direction of the gear set.