Bidirectional Valve Actuation With Direct Pneumatic Sealing
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Solution Overview
Problem
Existing two-way gate valve mechanisms are complex, difficult to assemble, and lack precision due to numerous components and intricate mechanical actions, particularly in the eccentric lateral movement of sealing plates.
Innovation Solution
A valve member driving device with a simplified design featuring two gas chambers, piston rods, guide rods, and a valve cylinder, allowing bidirectional movement through gas-inlet openings and channels, eliminating the need for rotational or lateral movement mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pneumatic cylinder with crank-like operating bodies and push-pull modules is used to achieve bidirectional sealing plate movement, then the valve can selectively seal either entrance, but the mechanism becomes complicated with numerous components and difficult assembly
Solution Approach 1:
The patent extracts and eliminates the complex crank-like operating bodies, rotating shafts, and push-pull modules from the system. Instead, it uses a simplified pneumatic cylinder that directly drives the sealing plate through a piston rod, removing unnecessary intermediate components while preserving the bidirectional sealing capability.
Solution Approach 2:
Rather than using mechanical rotation and lateral movement to achieve sealing plate displacement, the invention inverts the approach by using direct linear pneumatic actuation. The sealing plate is moved eccentrically through the piston rod's linear motion combined with the valve body's structure, eliminating the need for rotational mechanisms.
2Adaptability or versatility
If multiple rotating components and lateral movement mechanisms are used for sealing plate displacement, then bidirectional sealing is achieved, but assembly precision becomes difficult to maintain
Solution Approach 1:
The patent replaces the mechanical rotation and lateral movement system with a pneumatic actuation system. The pneumatic cylinder with piston rod provides direct linear force to move the sealing plate, eliminating multiple rotating components and their associated alignment requirements, thereby significantly improving assembly precision.
Solution Approach 2:
The invention introduces pneumatic actuation as the driving mechanism, using compressed air to move the piston rod which in turn displaces the sealing plate. This pneumatic system replaces the complex mechanical linkage system, providing more precise and controllable movement with fewer components requiring precision assembly.
3Adaptability or versatility
If a complex mechanism with multiple components is used, then the valve can achieve selective sealing, but the number of components increases and assembly becomes difficult
Solution Approach 1:
The patent merges multiple separate components (pneumatic cylinder, piston rod, and sealing plate drive mechanism) into an integrated assembly. The pneumatic cylinder is positioned within the valve body and directly connected to the sealing plate through the piston rod, combining what were previously separate operational elements into a unified, easier-to-assemble structure.
Solution Approach 2:
The invention removes the complex intermediate transmission components (cranks, rotating shafts, push-pull modules) from the system, leaving only the essential pneumatic actuation elements. This extraction of unnecessary components dramatically simplifies the assembly process while maintaining the selective sealing function.
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 reduces the number of components, simplifies assembly, and enhances precision in valve member movement, achieving easier and more accurate operation compared to prior art.
Implementation Method 1
Gas entering the two gas chambers from the first gas-inlet opening can push the first piston rod and the second piston rod toward the extended position
Data Source
AI summary
A valve member driving device capable of bidirectional movement includes: a main body with two gas chambers, a first gas-inlet opening, a first gas-inlet channel, a second gas-inlet opening, and a second gas-inlet channel; a first piston rod with a first flow passage; a second piston rod with a second flow passage; a first guide rod extending into the first flow passage at one end and having a gas socket and a gas hole in communication with the gas socket; a second guide rod extending into the second flow passage at one end and having a gas-guiding flow passage; a valve cylinder fixedly provided on the first piston rod and having a valve-cylinder gas chamber, an advance channel, a withdrawal channel, and a valve-cylinder piston rod; and a valve member fixedly provided on the valve-cylinder piston rod.