Pipe Fitting Rotary Valve Spring Pressing Force Control
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Solution Overview
Problem
Conventional pipe couplings with rotary valves face high sliding resistance when the male and female coupling members are connected, due to the pressing force required to maintain a seal, which can be excessive when fluid pressure is low.
Innovation Solution
The pipe coupling design incorporates a slide valve holder with a rotary valve that is pressed against a valve seat by a spring member, allowing reduced sliding resistance when decoupled and enhanced sealing with fluid pressure, utilizing pivot members and spring members to adjust the pressing force based on coupling state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring member presses the rotary valve against the valve seat to maintain sealing, then sealing reliability is improved, but sliding resistance increases making coupling operation difficult
Solution Approach 1:
The spring member is designed to be compressible, allowing the pressing force on the rotary valve to dynamically adjust based on the coupling state. When coupling members are separated, the spring maintains light pressing force for sealing while allowing easy rotation. When coupling members are connected, the spring compresses to reduce pressing force, enabling smooth rotation during coupling operation.
Solution Approach 2:
The pressing force parameter of the spring member is designed to change based on the coupling state. The spring's elastic properties allow the pressing force to be higher when decoupled (ensuring sealing) and lower when coupled (reducing sliding resistance), thus resolving the contradiction between sealing reliability and operational ease.
2Reliability
If the rotary valve is strongly pressed against the valve seat to prevent leakage, then sealing performance is improved, but sliding resistance increases
Solution Approach 1:
The spring member provides dynamic pressing force that adapts to operational conditions. During coupling/decoupling operations, the spring compresses to reduce pressing force and sliding resistance. During normal operation with fluid pressure, the spring maintains adequate pressing force for sealing, thus resolving the contradiction between sealing performance and sliding resistance.
Solution Approach 2:
The spring member automatically adjusts the pressing force based on the mechanical state of the coupling. When coupling members are connected, the spring compresses and reduces pressing force without external intervention. When separated, the spring returns to its original state and restores pressing force, enabling self-adjustment to resolve the sliding resistance issue.
3Ease of operation
If the spring force is reduced to decrease sliding resistance during coupling, then ease of operation is improved, but sealing reliability may deteriorate
Solution Approach 1:
The spring member's pressing force dynamically responds to the coupling state. During the coupling operation when members are connected, the spring compresses to reduce pressing force and sliding resistance, facilitating easy operation. Once coupled, the system maintains sealing through the fluid pressure acting on the rotary valve, allowing the spring to remain compressed without compromising sealing reliability.
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 design reduces sliding resistance during coupling and decoupling by minimizing the spring force when decoupled and leverages fluid pressure for improved sealing when coupled, resulting in efficient fluid path management.
Implementation Method 1
a spring member that presses the rotary valve against the valve seat. The rotary valve is displaceable in the axial direction of the slide valve holder, so that the rotary valve can be pressed against the valve seat by the fluid pressure in the coupling member in addition to the pressing force from the spring member
Implementation Method 2
when a fluid pressure acts in the coupling member, the rotary valve member is strongly pressed against the valve seat by utilizing the fluid pressure, thereby obtaining a proper seal
Implementation Method 3
The rotary valve is rotatable about a pivot axis extending in a direction perpendicular to the axial direction of the slide valve holder while the outer peripheral surface portion thereof slides on the valve seat
Data Source
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AI summary
At least one coupling member (2) has a slide valve holder (42) that is pushed in by the other coupling member (3) when coupled to the coupling member (2). The coupling member (2) further has a rotary valve (41) rotatably supported by the slide valve holder. The slide valve holder has a through-hole (425) constituting a flow path. A valve seat (26) is provided around the through-hole. The rotary valve (41) has an outer peripheral surface portion that slidingly engages the valve seat. One end of a fluid passage (411) extending through the rotary valve is open on the outer peripheral surface portion. The rotary valve is displaceable toward the valve seat and is urged toward the valve seat by a spring member (64). Thus, the outer peripheral surface portion is pressed against the valve seat. When a fluid pressure acts in the coupling member (2) when the coupling members (2, 3) are not coupled to each other, the fluid pressure presses the rotary valve toward the valve seat.