Safety Valve Sealing Element Pressure Channel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing safety valves face challenges in maintaining a reliable seal near limiting pressures and ensuring precise opening times due to issues like dirt accumulation and deformation of valve components, which affect the sealing plate's ability to remain sealed against the valve seat.
Innovation Solution
A safety valve design featuring a movable sealing body with a preloaded sealing element, where the sealing element is pressed against the valve seat via a pressure channel, allowing the medium pressure to generate a force that maintains the seal independently of the holding force, and the sealing body moves to open the valve when pressure exceeds the holding force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing plate is pressed against the valve seat with holding force to maintain seal, then sealing reliability improves, but the sealing plate cannot open when pressure exceeds limit
Solution Approach 1:
The sealing body is divided into two functional parts: a sealing element (sealing lip) that maintains contact with the valve seat, and a valve body that moves to open the valve. The sealing element remains pressed against the valve seat by the holding force even when the valve body lifts off, allowing the valve to open while maintaining sealing capability.
Solution Approach 2:
The sealing body is designed to be movable relative to the valve seat along the first axis. When medium pressure exceeds the holding force, the sealing body lifts off the valve seat to open the valve. The sealing element dynamically maintains contact with the valve seat through the holding force while the overall sealing body moves to enable valve opening.
2Productivity
If the sealing plate is frequently lifted and pressed against the valve seat, then pressure relief is achieved, but dirt accumulates and components deform reducing seal quality
Solution Approach 1:
Different parts of the sealing body have different functions: the sealing element (sealing lip) is designed specifically for sealing contact with the valve seat and remains pressed against it by the holding force, while the main valve body moves to enable pressure relief. This local differentiation allows frequent operation without compromising seal quality.
Solution Approach 2:
The sealing body is segmented into a sealing element that maintains continuous contact with the valve seat and a valve body that moves for pressure relief. This segmentation allows the sealing function to be maintained independently during frequent opening/closing operations, preventing dirt accumulation and deformation issues.
3Reliability
If the sealing element is pressed against the valve seat by medium pressure, then sealing reliability near limit pressure improves, but the holding force cannot act on the sealing element directly
Solution Approach 1:
The sealing body is segmented into a sealing element and a valve body. The holding force acts on the valve body, not directly on the sealing element. The sealing element is pressed against the valve seat by medium pressure acting on its second side, transmitted through the pressure channel. This segmentation resolves the contradiction by separating the force application points.
Solution Approach 2:
The medium pressure acts as an intermediary to press the sealing element against the valve seat. Instead of the holding force acting directly on the sealing element, the medium pressure transmitted through the pressure channel serves as the intermediary mechanism to achieve the sealing contact near limit pressure.
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 ensures a reliable seal near limiting pressures and precise opening of the safety valve, as the sealing element is pressed against the valve seat by medium pressure, and the sealing body moves to open the valve when pressure exceeds the holding force, maintaining operational integrity.
Implementation Method 1
If the pressure of the medium now increases in the pressure area, this pressure also acts on the second side of the sealing element via the pressure channel. Depending on the size of the area on the second side that is subjected to pressure in this way, a force is generated by the medium on the sealing element.
Implementation Method 2
a sealing body that is movable relative to the valve seat along a first axis and is pretensioned along this first axis in the direction of the valve seat with a holding force
Implementation Method 3
At the same time, however, the holding force does not act on the sealing element and the valve seat, but is absorbed by the contact surface.
Data Source
Figure 1~3
Figure 2~4
AI summary
A safety valve has a valve seat (8) and a sealing body (12) that is movable relative to the valve seat (8) along a first axis (x) and pre-tensioned along this first axis (x) towards the valve seat (8) with a holding force (FH). A sealing element (24) is arranged on the sealing body (12) such that its first side (32) can be brought into sealing contact with the valve seat (8). A second side (34) of the sealing element (24), located opposite the first side (32) of the sealing element (24), is connected via a pressure channel (40) to a pressure region (4) surrounded by the valve seat (8). The sealing body (12) has a contact surface (25) which, in the closed state of the safety valve, comes into contact with a bearing surface (10).