Quick Exhaust Valve Throttle for Pressure Range Control
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Solution Overview
Problem
Existing quick exhaust valves face challenges in controlling a drive over a broader pressure range without the exhaust valve responding unnecessarily, leading to pressure drops that require compensation by a positioner, and struggle with oscillations in systems using diaphragm actuators.
Innovation Solution
The integration of an adjustable throttle within the valve housing allows for precise pressure equalization between the outlet and inlet ports, enabling targeted vent valve opening, and the inclusion of a check valve and adjustable stroke limitation improve control behavior and response dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vent valve is designed to open at a specific pressure quotient, then venting reliability is improved, but the drive control range is limited and pressure drops occur
Solution Approach 1:
A throttle is introduced as an intermediary element between the outlet connection and the first control surface. This throttle mediates the pressure transmission, allowing gradual pressure equalization instead of direct pressure coupling. The throttle enables the vent valve to respond only when the pressure quotient reaches the predetermined threshold, while allowing the drive to operate across a broader pressure range without triggering unnecessary venting events.
2Stress or pressure
If the vent valve opens in response to pressure drops, then pressure equilibrium is restored, but drive position control oscillates
Solution Approach 1:
The system implements feedback control through the pressure quotient mechanism. The vent valve continuously monitors the pressure relationship between inlet and outlet ports, and only activates when the predetermined pressure quotient is reached. This feedback approach prevents oscillations by ensuring venting occurs only when genuinely needed, rather than responding to transient pressure fluctuations during normal drive operation.
3Adaptability or versatility
If the throttle is made adjustable, then pressure range adaptability is improved, but device complexity increases
Solution Approach 1:
The throttle is designed with adjustable characteristics, allowing its opening degree or resistance to be modified according to different operating requirements. This dynamic adjustability enables the same valve structure to adapt to various pressure ranges and application scenarios. The adjustment mechanism typically involves movable components that change the effective throttle area, providing versatility without requiring multiple different valve designs.
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 solution allows for reliable venting and adjustable pressure range regulation, enhancing control quality and preventing unnecessary venting, thereby stabilizing drive position control across a wider pressure range.
Implementation Method 1
The vent valve can be controlled as a function of the pressure quotient between the outlet port and the inlet port
Implementation Method 2
the vent valve has a first control surface that is connected to the input port and a second control surface that is connected to the output port
Implementation Method 3
the output connection is connected to the first control surface via a throttle that is integrated in the housing and is in particular adjustable
Implementation Method 4
a straight-through valve, in particular a check valve, can be provided, which is arranged parallel to the throttle and which blocks in a flow direction from the outlet connection to the inlet connection and bridges the throttle in the opposite flow direction
Implementation Method 5
the check valve has a spring, by means of which a pressure quotient threshold value is set in a targeted manner
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a quick vent (10) comprising a housing (12) with an inlet port (14), a vent port (18) to the atmosphere, and an outlet port (16), wherein a vent valve (20) is provided at the vent port (18), which is controllable depending on the pressure ratio between the inlet port (14) and the outlet port (16), wherein in a first operating case – venting – the vent valve (20) is closed by a valve body (24) located in the housing (12), and in a second operating case – venting – the vent valve (20) is open, thereby venting the outlet port (16), and furthermore the vent valve (20) has a first control surface (28) which is connected to the inlet port (14) and a second control surface (26) which is connected to the outlet port (16). The invention is characterized in thatthat the output terminal (16) is connected to the first control surface (28) via a choke (30) integrated in the housing (12).