Cantilever Spring Valve Plug for Fluidized Material Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spring-biased plug valves in pneumatic conveying systems, such as those used in pulverized coal injection, face challenges with fluid-tightness due to temperature variations and fine particle accumulation, leading to potential leakage and damage, especially at high temperatures and pressures.
Innovation Solution
The use of cantilever springs arranged in clearance spaces opposite to the valve seat to bias the valve plug, eliminating the need for helical springs and providing a more reliable sealing contact, with an adjustment device to set the pre-tension and axial position of the cantilever springs for optimal sealing, and an Oldham coupling for floating mounting of the valve plug.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If helical springs are used in guiding bores to bias the plug and seat, then spring biasing function is achieved, but fine particles accumulate in the guiding bores causing blocking and loss of fluid-tightness
Solution Approach 1:
The invention extracts the spring biasing function from the helical spring mechanism and implements it through alternative means (cam mechanism, elastic deformation of the plug, or external spring arrangement) that eliminates the guiding bores where particle accumulation occurs. This removes the source of the harmful effect while preserving the essential spring biasing function needed for fluid-tightness.
Solution Approach 2:
The invention introduces an intermediary mechanism (cam mechanism or elastic plug design) that mediates between the need for spring biasing and the problem of particle accumulation. This intermediary transfers the biasing force without requiring the problematic helical spring configuration, thereby eliminating particle trapping while maintaining sealing pressure.
2Force
If helical springs are used in guiding bores, then spring biasing is provided, but the valve becomes susceptible to blocking and potential damage
Solution Approach 1:
The invention removes the complex guiding bores structure and helical spring arrangement, replacing them with simpler mechanisms such as a cam mechanism, elastic plug design, or external spring arrangement. This extraction eliminates the structural complexity while maintaining the essential spring biasing force function.
Solution Approach 2:
The invention substitutes the mechanical helical spring system with alternative mechanisms (cam mechanism, elastic deformation, or external spring arrangement) that achieve the same biasing force function without the complexity and vulnerability of the original guiding bores structure.
3Ease of operation
If conventional plug valve design is used, then flow control is achieved, but temperature variations cause leakage due to differing thermal expansion
Solution Approach 1:
The invention changes the physical parameters of the sealing system by introducing spring biasing that dynamically adjusts to temperature variations. The spring mechanism compensates for thermal expansion differences between materials, maintaining constant sealing pressure across varying temperatures while preserving flow control functionality.
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 configuration enhances fluid-tightness, reduces the risk of clogging, and allows for precise adjustment of sealing contact pressure, ensuring reliable operation in varying conditions without downtime, suitable for severe environments like pulverized coal injection systems.
Implementation Method 1
spring means biasing the valve plug against the valve seat perpendicularly to the axis of rotation, wherein the spring means comprises at least one cantilever spring arranged in a clearance space opposite to the valve seat so as to bias the valve plug against the valve seat
Data Source
AI summary
A flow control valve for fluidized material comprises a valve housing having a valve chamber with a valve seat and a valve plug having a flow passage, the valve plug being arranged inside the valve chamber in front of the valve seat (30) so as to be rotatable about an axis of rotation for controlling a flow through the flow control valve. It further comprises spring means biasing the valve plug against the valve seat perpendicularly to the axis of rotation, for achieving a sealing contact between the valve seat and the valve plug. According to an important aspect of the invention, the spring means comprises at least one cantilever spring (40) arranged in a clearance space opposite to the valve seat (30) so as to bias the valve plug against the valve seat.