Segmented Plunger Structure to Prevent Valve Diaphragm Distortion
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Solution Overview
Problem
Conventional fluid control valves experience diaphragm distortion during assembly and increased load on the diaphragm due to the screw member tightening, leading to reduced reproducibility and responsiveness.
Innovation Solution
The fluid control valve design includes a plunger divided into multiple sections, with a second division body on the actuator side that is rotatable and slidable, reducing direct force transfer to the diaphragm and utilizing an elastic body to assist movement, thereby minimizing diaphragm distortion and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw member is tightened to the plunger to fix the position sensor, then the position sensor is firmly fixed, but the tightening force distorts the diaphragm and reduces product reproducibility
Solution Approach 1:
The plunger is divided into two separate division bodies (first and second division bodies) that can rotate relative to each other. This segmentation allows the screw member to be tightened to the second division body without directly transmitting tightening forces to the diaphragm-connected first division body, thus fixing the position sensor reliably while preventing diaphragm distortion and maintaining product reproducibility.
2Ease of operation
If the plunger moves wholly to the actuator side depending on the diaphragm restoring force, then the valve operates, but the load on the diaphragm increases causing damage and reduced responsiveness
Solution Approach 1:
By dividing the plunger into two rotationally independent division bodies, the system can manage force transmission separately. The second division body can be rotated to control force application to the diaphragm, enabling valve operation while reducing excessive load on the diaphragm and preventing damage.
Solution Approach 2:
The rotatable connection between the two division bodies introduces dynamic control over force transmission. The second division body can be rotated to adjust or reduce the load on the diaphragm during operation, allowing the valve to function while protecting the diaphragm from excessive stress that would reduce responsiveness or cause damage.
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 improves product reproducibility by preventing diaphragm distortion during assembly and reduces the load on the diaphragm, enhancing the responsiveness and longevity of the fluid control valve.
Implementation Method 1
an elastic body that presses the second division body toward the actuator side
Data Source
AI summary
The present invention intends to make it hard to distort a diaphragm at the time of assembling in a fluid control valve structured to screw a screw member to a plunger. The fluid control valve that makes an actuator move a valve body installed movably in a contacting/separating direction with respect to a valve seat includes: the plunger that is interposed between the valve body and the actuator to transfer the power of the actuator to the valve body; and the diaphragm connected to the circumferential surface of the plunger. In addition, the plunger includes: a first division body connected to the diaphragm; and a second division body that is arranged on an actuator side of the first division body and to which the screw member is screwed. Further, the second division body is configured to be rotatable with respect to the first division body in its circumferential direction.