Capacitive Valve Sampling Device for Sealed Enclosure Wear Reduction
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Solution Overview
Problem
Existing solid particle sampling devices from sealed enclosures, such as silos or reactors, face issues with premature valve wear due to high-temperature solid particles, leading to increased maintenance costs and potential leaks, especially when the enclosure is under pressure.
Innovation Solution
The use of at least one capacitive valve in the sampling device, positioned downstream from a tubular pipe, allows for efficient discharge of solid particles while minimizing wear on the valve components, as the particles are stored in the capacitive valve's cavity rather than on the sealing surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional valves (conical ball valves, spherical ball valves, parallel slide gate valves) are used in the sampling device, then the valve can control the discharge of solid particles, but the solid particles at high temperature cause premature wear of the valve components (ball and seat) through friction during progressive opening
Solution Approach 1:
The patent extracts the harmful function of particle storage from the valve body by introducing a separate storage chamber. The valve body no longer stores solid particles during operation, eliminating the friction and wear that occurred when particles accumulated on the ball and seat surfaces. Instead, particles are stored in a dedicated chamber separate from the valve mechanism.
Solution Approach 2:
The patent introduces an intermediary storage chamber between the sampling head and the valve. This intermediate space receives and stores solid particles before they reach the valve, preventing direct contact between particles and valve components. The intermediary chamber acts as a buffer that decouples the particle storage function from the valve control function.
2Ease of operation
If conventional valves are used to discharge solid particles from the sampling device, then the valve can control particle flow, but the high-temperature particles cause erosive wear on the ball and seat surfaces, requiring regular replacement
Solution Approach 1:
The patent removes the particle storage function from the valve body by creating a separate storage chamber. This extraction eliminates the source of erosive wear (high-temperature particles frictionally contacting the ball and seat), thereby reducing maintenance frequency while preserving ease of valve operation for controlling particle discharge.
Solution Approach 2:
The storage chamber serves as an intermediary that protects the valve components from direct exposure to high-temperature particles. Particles are stored in this intermediate chamber and only discharged through the valve when needed, preventing continuous erosive contact with the valve surfaces and reducing maintenance requirements.
3Ease of operation
If conventional valves are used in the sampling device, then particle discharge can be controlled, but valve leakage occurs due to wear, causing depressurization of the enclosure when under pressure
Solution Approach 1:
The patent extracts the particle storage function from the valve body, eliminating the wear mechanism that caused leakage. By separating storage and valve control functions, the valve surfaces are protected from erosive contact with high-temperature particles, maintaining better sealing and preventing enclosure depressurization while preserving discharge control capability.
Solution Approach 2:
The storage chamber acts as an intermediary that prevents direct contact between high-temperature particles and the valve sealing surfaces. This intermediate space eliminates the wear pathway that led to leakage, thereby maintaining pressure containment reliability while allowing controlled particle discharge through the valve.
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 significantly reduces valve wear and maintenance needs, while also minimizing the risk of leaks and depressurization, thereby enhancing the safety and efficiency of the sampling process.
Implementation Method 1
the sampling device comprising a first capacitive valve for discharging the solid particles, the first capacitive valve being positioned downstream from the tubular pipe
Implementation Method 2
the sampling head being configured for gravity sampling of a predetermined volume of solid particles from said sealed enclosure
Implementation Method 3
the sampling head being configured for gravity sampling of a predetermined volume of solid particles from said sealed enclosure
Data Source
AI summary
The present invention relates to a device (10) for sampling solid particles from a sealed enclosure (12), sampling device (10) comprising a tubular body (18) carrying a sampling head (16), sampling head (16) being configured for gravity sampling of a volume of solid particles (14) from the enclosure, the device comprising a tubular pipe (52) attached to tubular body (18) and forming a non-zero angle with tubular body (18), tubular body (18) comprising a deflector (50) for deflecting solid particles (14) in tubular pipe (52). Additionally, sampling device (10) comprises a capacitive valve for discharge of the solid particles positioned downstream from tubular pipe (52).The invention also relates to a method for sampling solid particles, and a method for revamping a sampling device (10).