Quarter-Turn Valve Actuator Layout for High-Torque Maintenance
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Solution Overview
Problem
Existing valve actuators for fluid flow control in industrial installations are complex, requiring specialized machinery for manufacturing and maintenance, posing logistical challenges and safety risks due to high torque and pressure requirements.
Innovation Solution
A ¼-turn actuator design comprising an upper and lower plate with a cylinder and rotor arm system, featuring a guiding element and rotating element with a visual indicator or manual override, allowing easy assembly, disassembly, and maintenance, capable of operating under high pressure and torque without specialized tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing valve actuators are used to achieve high torque and pressure control, then the valve operation is reliable, but the device complexity and manufacturing cost increase
Solution Approach 1:
The actuator is divided into separate functional modules: a cylinder assembly for pressure input, a rotor arm mechanism for torque generation, and a valve stem connection system. This segmentation allows each component to be optimized independently while maintaining overall reliability under high torque and pressure conditions.
Solution Approach 2:
A rotor arm acts as an intermediary mechanical element between the linear motion of the cylinder stem and the rotational motion required to operate the valve. This intermediary mechanism efficiently transmits force while reducing the complexity of direct linear-to-rotational conversion, maintaining reliability without excessive complexity.
2Manufacturing precision
If complex machinery is used for manufacturing actuator components, then manufacturing precision is improved, but the ease of manufacture and logistics cost decrease
Solution Approach 1:
The actuator components are designed as separable modules that can be manufactured using standard machining centers available at ordinary manufacturing facilities. Each module (cylinder, rotor arm, connection elements) can be produced independently with conventional equipment, eliminating the need for specialized complex machinery while maintaining adequate precision for high-pressure operation.
Solution Approach 2:
The actuator employs universal connection interfaces and standard machining features that can be produced on common manufacturing equipment. This universality allows components to be manufactured at distributed facilities without requiring specialized tooling or complex machinery, improving ease of manufacture and logistics.
3Manufacturing precision
If specialized tools and equipment are used for maintenance, then maintenance precision is improved, but the ease of repair and maintenance cost decrease
Solution Approach 1:
The actuator is designed with modular components that can be easily separated and reassembled using basic hand tools. The cylinder, rotor arm, and valve stem connections are configured to allow field disassembly and reassembly without specialized equipment, enabling maintenance personnel to service the actuator at the installation location.
Solution Approach 2:
The actuator incorporates self-contained components with accessible fastening elements that can be serviced by standard maintenance procedures. The design allows operators to perform basic maintenance, calibration, and component replacement using conventional tools, reducing dependence on specialized service equipment and external maintenance facilities.
4Force
If heavy actuators are used to achieve required torque, then the output torque is sufficient, but the weight and operator safety increase
Solution Approach 1:
The actuator utilizes a pneumatic or hydraulic cylinder to generate the required output torque through fluid pressure. This allows the system to achieve high torque output (2000 Nm) with a compact, lightweight design by leveraging the high energy density of compressed gas or liquid, rather than relying on heavy mechanical components.
Solution Approach 2:
The actuator employs a vertical cylinder configuration where the piston rod connects to the rotor arm, utilizing vertical space rather than horizontal expansion. This dimensional arrangement allows the generation of high torque through a compact footprint, reducing the overall size and weight of the actuator while maintaining the required 2000 Nm output capability.
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
Enables safe, efficient, and cost-effective operation and maintenance of fluid flow control valves, supporting up to 15,000 psi differential pressure and 2000 Nm torque, with visual position feedback or manual override options, reducing maintenance time and costs.
Implementation Method 1
a guiding element (8) inserted and slidably in line between a lower position and an upper position within guiding grooves (9, 9') arranged in the respective upper and lower plates
Data Source
AI summary
The present invention refers to a valve actuator device comprising an upper plate and a lower plate facing each other, defining a housing inside which a cylinder with a stem is housed. The stem is connected to a rotor arm by a guiding element inserted and slidably in line between a lower position and an upper position within guiding grooves arranged in the respective upper plate and lower plate. The rotor arm is configured to rotate about a rotation axle arranged in a rotating element. The valve actuator device may include a position sensor system for detecting an open position and a closed position. The valve actuator device may include a manual override system for manually opening or closing the valve.