Valve Member Segmentation for Aggressive Media Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for regulating the flow of media lack strict separation between the actuating device and the medium, leading to potential contamination and reduced service life, especially when dealing with aggressive media.
Innovation Solution
A device with a structurally stable valve member, comprising a closing body submerged in the medium and a frame separated from the medium, where the actuating device engages the frame, preventing contact between the actuating device and the medium, and utilizing a double-seat valve mechanism with a single valve member for controlling flow through two separate inlets and a common outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuating device is in direct contact with the medium for flow control, then the device complexity is reduced, but the service life and reliability deteriorate due to contamination from aggressive media
Solution Approach 1:
The valve member is segmented into a closing body that contacts the medium and a frame that is engaged by the actuating device, with the two parts connected by ribs. This segmentation allows the actuating device to remain separated from the aggressive medium while maintaining functional integration, thereby improving reliability without excessive complexity
Solution Approach 2:
The closing body acts as an intermediary between the actuating device and the medium. The actuating device moves the frame, which in turn moves the closing body to control the valve openings. This intermediary structure protects the actuating device from direct contact with aggressive media, extending service life
2Device complexity
If a single valve member controls multiple valve openings, then the device complexity is reduced, but the manufacturing precision and sealing reliability may worsen
Solution Approach 1:
The single valve member (closing body) is designed with multiple sealing surfaces that can control multiple valve openings independently. Each sealing surface on the closing body corresponds to a specific valve seat, allowing one actuating device to control multiple flow paths with precise sealing at each interface
Solution Approach 2:
Different sealing surfaces on the closing body are positioned at different locations and orientations to match specific valve seats. This local differentiation of sealing surfaces allows each interface to be optimized for its specific sealing requirements, maintaining high sealing precision despite using a single valve member
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 ensures long service life and robust operation by preventing medium contact with the actuating device, allowing for the regulation of aggressive media and enabling economic manufacturing with a coated valve member, while maintaining efficient flow control.
Implementation Method 1
a valve member (23) that is actuated by an actuating device (14) for regulating the flow of the medium, wherein the valve member (23) has a closing body (24), located in the valve chamber (20), that cooperates with the valve seats (21, 22), and it also has a frame (25), separated from the medium, that surrounds the closing body (24) with spacing, wherein the actuating device (14) acts on the frame (25) for moving the closing body (24) into and out of the sealing position
Implementation Method 2
A valve closing spring is located in a blind bore of the armature and is braced on one end on the armature and on the other on an adjusting pin that is accessible from the outside, and when the electromagnet is not excited, the valve closing spring, via the armature, presses the valve member against the valve seat
Data Source
AI summary
The invention relates to a device for regulating the flow of a liquid or gaseous medium, having a valve housing (11), which has at least one valve inlet (15, 16) and a valve outlet (17) as well as at least one valve opening (18, 19), located between the two and surrounded by a valve seat (21, 22); having a valve member (23) controlling the valve opening (18, 19); and having a valve member actuating device (14), which has a valve closing spring (36) and an actuator (37) operating counter to the valve closing spring. For creating a robust device with a long service life, and in which the valve member actuating device (14) is hermetically separated from the medium, the valve member (23) has a closing body (24), cooperating with the at least one valve seat (21, 22), and a frame (25), separated from the medium, for engaging the valve member actuating device (14), which frame surrounds the closing body (24) and is solidly joined to it.