Fluid Control Valve Opening by Pressure Equalization
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Solution Overview
Problem
Existing fluid control valves face difficulties in opening due to excessive pressure contact between the valve body and the inner peripheral surface of the hole, caused by fluid pressure and friction, especially at high pressures and flow velocities.
Innovation Solution
A method involving a pressure adjustment step to decrease the pressure difference between the two sides of the valve body, allowing for easier opening by reducing the force exerted by fluid pressure, and a valve opening step that includes moving the valve body and seal portion in a coordinated manner to facilitate operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the valve body is opened directly in a blocking state with high fluid pressure, then the valve body can be opened quickly, but the valve body is pressed excessively against the inner peripheral surface of the hole due to fluid pressure, causing difficult operation or damage to the seal portion
Solution Approach 1:
The patent applies preliminary action by introducing fluid into the valve body cavity before opening the valve body. This pre-filling of fluid equalizes the pressure between both sides of the valve body, preventing excessive pressure differential that would cause the valve body to press against the hole's inner peripheral surface. The seal portion is expanded to the sealing position beforehand, ensuring proper sealing before the actual opening operation, thus avoiding damage and facilitating smooth operation.
2Speed
If the valve body is opened directly in a blocking state with high fluid pressure, then the valve body can be opened quickly, but the seal portion is pressed against cutting burrs formed at the hole, causing damage to the seal portion
Solution Approach 1:
The patent applies preliminary action by expanding the seal portion to the sealing position before opening the valve body. This ensures the seal portion is properly positioned and protected before encountering any cutting burrs or irregularities in the hole. The seal portion is prepared in advance to withstand potential damage, maintaining its integrity during the opening operation.
3Speed
If the valve body is opened directly in a blocking state with high fluid pressure, then the valve body can be opened quickly, but the operation of opening the valve body becomes difficult due to friction force between the seal portion and the inner peripheral surface of the hole
Solution Approach 1:
The patent applies preliminary action by equalizing the fluid pressure on both sides of the valve body before opening. This prevents the valve body from being pressed excessively against the inner peripheral surface of the hole, thereby reducing the friction force between the seal portion and the hole surface. The friction force is minimized in advance, allowing for easier and smoother valve opening operation.
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 method enables smooth and easy operation of opening the valve body, reducing the risk of damage from excessive pressure and friction, and ensuring reliable fluid control even at high pressures and flow velocities.
Implementation Method 1
the seal portion is pressed against an inner peripheral surface of the hole and an inner peripheral surface of the fluid pipe so that the flow of fluid in the fluid pipe can be blocked
Implementation Method 2
the valve body of the fluid control valve is pressed to one side (the inside of the predetermined section) in the pipe axis direction by the pressure of fluid in the fluid pipe
Data Source
AI summary
A method of opening a fluid control valve having a housing externally fitted onto a fluid pipe in a hermetic state and a valve body configured for contacting an inner peripheral surface of a hole of the fluid pipe provided in the housing and an inner peripheral surface of the fluid pipe to hermetically block or open a flow of fluid in the fluid pipe. The method includes a pressure adjustment step of decreasing a pressure difference between the fluid in the fluid pipe on a first side of the valve body and the fluid in the fluid pipe on a second side of the valve body in a blocking state of the valve body. The first side and the second side of the valve body are arranged so as to sandwich the valve body in an axial direction of the fluid pipe, and a valve opening step of opening the valve body.