Wye-Fitting Level Sensor Assembly for Clean Valve Inlet Sensing
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Solution Overview
Problem
Existing level sensor assemblies for controlling motorized valves face challenges in ensuring accurate sensing and valve control due to sensor disruption of fluid flow and contamination by particles and debris.
Innovation Solution
A fluid level sensor assembly featuring a wye fitting with a main branch for fluid flow and a second branch for the level sensor, along with a nozzle system for cleaning the sensor and a connector insert to secure the wye fitting relative to the valve inlet, preventing rotation and ensuring accurate orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the level sensor is located in the pipe through which fluid flows, then the sensor can detect fluid level directly, but the sensor disrupts fluid flow and becomes contaminated by particles and debris
Solution Approach 1:
A wye fitting is introduced as an intermediary component that branches off from the main fluid pipe. The level sensor is mounted in this separate branch rather than directly in the main flow path. This intermediary structure allows the sensor to detect fluid level indirectly through the branched connection, eliminating direct exposure to flowing fluid, particles, and debris while maintaining accurate level measurement capability.
2Ease of manufacture
If the wye fitting is connected to the valve inlet without anti-rotation features, then assembly is simple, but the wye fitting may rotate and misalign the sensor
Solution Approach 1:
An asymmetric anti-rotation feature is incorporated into the wye fitting assembly. This feature creates a specific geometric constraint that prevents rotational movement of the wye fitting relative to the valve inlet. The asymmetric design ensures that the wye fitting can only be installed in one correct orientation, thereby guaranteeing proper sensor alignment while maintaining a relatively simple assembly process.
Data Source
Figure 1
Figure 2~3(e)
Figure 4~5
AI summary
A fluid level sensor assembly comprising a first pipe component (30) defining a flow path for the fluid and configured to be attached to a valve (1) to control flow of the fluid from the first pipe component, and a fluid level sensor (2) arranged in or on the first pipe component to detect a level of fluid in the first pipe component and to generate a command signal for operation of the valve according to the level detected, and an insert (50) fitted to an end of the first pipe component and extending axially from the end to be fitted to an inlet of the valve, in use, wherein the insert is configured to secure the first pipe component against rotation relative to the valve inlet when the insert is fitted to the inlet. In another aspect, the first pipe component is a wye fitting (30) defining a first branch (31) that defines the fluid path and a second branch (32) in which the sensor (2) is located, and the wye-fitting is provided with a nozzle (60) to direct fluid from an inlet end to the branch in which the sensor is located, the nozzle having a first opening (61) at the inlet end and a second, smaller opening (62) at an outlet end directed to the sensor to clean the sensor.