Rotatable Process Transmitter Coupling for Controlled Angular Adjustment
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Solution Overview
Problem
Conventional rotatable couplings in industrial process transmitters allow excessive rotation between the sensor body and main housing, leading to damage of wires and transmitter malfunction due to improper set screw installation or loosening from vibration.
Innovation Solution
A rotatable coupling design featuring a flange member within a groove and a compressible member, which restricts axial movement and rotational freedom to prevent excessive rotation, ensuring secure engagement between the sensor body and main housing while allowing limited angular adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional rotatable coupling is used to allow angular adjustment between sensor body and main housing, then adaptability is improved, but reliability deteriorates due to excessive rotation causing wire damage and component malfunction
Solution Approach 1:
The coupling mechanism transitions from a static fixed connection to a dynamic rotatable connection that allows controlled angular adjustment. The set screw and groove interaction enables the sensor body to rotate to different angular positions while maintaining a secure locked position, providing adaptability without compromising reliability through uncontrolled movement
Solution Approach 2:
The coupling controls the parameter of rotation angle by allowing adjustment within a specific range and then locking it in place. The set screw changes the state from movable to fixed, enabling the system to transition between different angular configurations while preventing excessive rotation that would damage wires or components
2Ease of operation
If a rotatable coupling with set screw is used to enable sensor body rotation, then ease of operation is improved, but device complexity increases due to additional components like flange members and grooves
Solution Approach 1:
The set screw serves multiple functions: it acts as both a locking mechanism and a positioning element. When tightened, it automatically engages with the groove to lock the sensor body in place, eliminating the need for separate locking components and simplifying the overall structure while maintaining ease of operation
Solution Approach 2:
The coupling mechanism is divided into distinct functional elements: the flange member provides the rotating interface, the groove defines the rotation path, and the set screw provides locking capability. This segmentation allows each component to be simple in design while collectively providing complex functionality
3Reliability
If the sensor body is securely attached to prevent any rotation, then reliability is improved, but adaptability deteriorates due to inability to perform angular adjustment for proper sensor orientation
Solution Approach 1:
The coupling mechanism transitions from a static fixed connection to a dynamic rotatable connection that allows controlled angular adjustment. The set screw and groove interaction enables the sensor body to rotate to different angular positions while maintaining a secure locked position, providing adaptability without compromising reliability through uncontrolled movement
Solution Approach 2:
The set screw is pre-positioned to engage with the groove before rotation occurs. This preliminary positioning ensures that once the desired angular adjustment is made, the locking action is immediate and secure, maintaining connection stability while enabling adaptability
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
Prevents undesired decoupling and damage to components by limiting excessive rotation, maintaining secure connections and enhancing the reliability of industrial process transmitters.
Implementation Method 1
The sensor body includes a process sensor and a second threaded portion in threaded engagement with the first threaded portion. Relative rotation between the sensor body and the main housing about an axis of the bore causes relative movement between the sensor body and the main housing along the axis.
Implementation Method 2
A compressible member compressed in a direction along an axis of the cylindrical bore. Rotation of the sensor body relative to the main housing is resisted by the compressible member.
Data Source
AI summary
An industrial process transmitter includes a main housing, a sensor body, and a flange member. The main housing contains transmitter circuitry and includes a first threaded portion. The sensor body includes a process sensor and a second threaded portion in threaded engagement with the first threaded portion. One of the first and second threaded portions includes a threaded cylindrical projection, and the other includes a threaded cylindrical bore. The flange member is received within a groove of the projection. Movement of the sensor body relative to the housing along an axis of the bore is restricted to an axial distance through engagement between the flange and the first or second threaded portion that includes the threaded cylindrical bore, and engagement between the main housing and the sensor body. Rotation of the sensor body relative to the housing about the axis is limited by the axial distance.