Replaceable Atmospheric Vent Filter for Pressure Transmitters
Solution Overview
Problem
Existing process fluid pressure transmitters in sanitary applications face issues with contamination and maintenance, as the filter element is permanently affixed and can become clogged or damaged, requiring the entire device to be taken offline for repair, especially when exposed to caustic chemicals and high-pressure cleaning.
Innovation Solution
A replaceable atmospheric vent filter system is introduced, featuring a polytetrafluoroethylene (PTFE) filter element and a filter retainer assembly that allows for easy replacement and protection from contaminants, ensuring the filter is not directly contacted during cleaning and is sealed to prevent caustic chemicals from entering the transmitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the filter element is permanently affixed to the transmitter, then the transmitter structure is simplified, but the maintenance complexity increases and downtime increases when the filter becomes clogged or damaged
Solution Approach 1:
The filter assembly is segmented into a modular unit that includes the filter element, filter retainer, and sealing features as integrated components. This modular filter assembly can be independently removed from the transmitter body, allowing the filter to be replaced without affecting the main transmitter structure. The segmentation enables easy maintenance while keeping the overall transmitter design relatively simple.
Solution Approach 2:
The filter element is extracted from the permanent structure and made replaceable through the filter retainer mechanism. The filter retainer holds the filter element in a removable manner, allowing the filter to be taken out for replacement or cleaning. This extraction principle enables the filter to be separated from the main transmitter body for independent maintenance.
2Ease of repair
If the entire transmitter is taken offline for filter replacement, then the filter can be properly maintained, but the productivity and continuous operation capability deteriorate
Solution Approach 1:
The filter assembly is designed as a separate modular unit that can be independently accessed and replaced. The filter retainer mechanism allows the filter element to be removed and replaced without disassembling the main transmitter body, enabling quick maintenance operations that minimize downtime and maintain productivity.
Solution Approach 2:
The filter element is designed to be pre-assembled with the filter retainer and sealing components as a complete modular unit. This preliminary assembly allows the entire filter assembly to be quickly swapped out as a single unit, reducing the time required for maintenance and minimizing interruptions to continuous operation.
3Ease of operation
If the filter is exposed to caustic chemicals and high-pressure cleaning, then the cleaning effectiveness is improved, but the filter element may become damaged or degraded
Solution Approach 1:
The filter element is extracted from direct exposure to harsh cleaning conditions by designing it as a replaceable component. The filter retainer and housing structure absorb the impact of caustic chemicals and high-pressure cleaning, protecting the filter element. When the filter becomes degraded, it can be replaced without subjecting the main transmitter body to damaging cleaning processes.
Solution Approach 2:
The filter retainer and housing structure serve as protective barriers that cushion the filter element from direct exposure to caustic chemicals and high-pressure spray. The design anticipates the harsh cleaning environment and provides structural protection, allowing the filter to be cleaned indirectly or replaced rather than subjected to direct high-pressure impact that could damage it.
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
The solution provides a cost-effective, compact, and easy-to-maintain design that withstands high-pressure cleaning and caustic solutions, minimizing exposure to chemicals and reducing downtime by allowing quick filter replacement, thus ensuring continuous operation and improved reliability in sanitary environments.
Implementation Method 1
a filter element disposed therein
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A process fluid pressure transmitter (100) for measuring a process pressure referenced to atmospheric pressure is provided. The process fluid pressure transmitter (100) includes a pressure sensor (118) fluidically coupled to a pair of pressure conveying conduits (116, 120). The pressure sensor (118) has an electrical characteristic that varies with the pressures applied by the pressure conveying conduits (116, 120). A process fluid inlet (114) is disposed to contact a process fluid, and is in fluidic communication with a first conduit (116) of the pair of pressure conveying conduits (116, 120). An atmospheric vent (134) is coupled to a second conduit (120) of the pair of pressure conveying conduits (116, 120). The atmospheric vent (134) is replaceable and has a filter (140) element disposed therein.