Field Device Housing Threaded Element Hygiene Seal
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Solution Overview
Problem
In the food and pharmaceutical industries, existing cover closures for field devices are inadequate due to difficulties in achieving precise tolerances and hygiene standards, as they either require screws for access or threads that are challenging to integrate, leading to inefficiencies in sealing and maintenance.
Innovation Solution
A housing design featuring a threaded element inserted into an opening with a complementary thread, a retaining element, and a sealing element to ensure tight closure and easy assembly, using materials like stainless steel and plastic, and allowing for various fastening methods such as screwing, welding, or gluing, to enhance hygiene and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cover is pressed against the housing by means of a screw, then access to the inside of the housing is provided, but hygiene standards are compromised due to gaps and sealing difficulties
Solution Approach 1:
The closure system is segmented into a threaded element inserted into the housing opening and a separate cover with complementary thread. This segmentation allows the threaded element to remain fixed in the housing while the cover can be easily attached and detached, providing access while maintaining sealing through the threaded connection and sealing element.
Solution Approach 2:
A sealing element is introduced as an intermediary component between the housing body and the cover. This sealing element fills the gap between the two parts, preventing contamination while allowing the cover to be securely attached via the threaded element, thus resolving the hygiene issue while maintaining access capability.
2Ease of operation
If a thread is introduced on or into a housing, then the cover can be screwed on, but small tolerances and gap dimensions are difficult to achieve
Solution Approach 1:
The threading function is segmented from the housing wall and implemented in a separate threaded element that is inserted into the housing opening. This allows the housing wall to be manufactured independently with less stringent tolerance requirements, while the threaded element provides the precise threading interface needed for secure cover attachment.
Solution Approach 2:
The threaded element acts as an intermediary that bridges the housing opening and the cover. By placing the threading in this intermediate component rather than directly in the housing wall, the system achieves both easy cover attachment and better control over gap dimensions, as the threaded element can be precisely manufactured and positioned.
3Reliability
If the housing design incorporates a threaded element inserted into the opening, then hygiene and precision are improved, but device complexity increases
Solution Approach 1:
The threaded element serves multiple functions: it provides the threading interface for cover attachment, acts as a retaining structure for the sealing element, and serves as a mounting point for the cover. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved hygiene and sealing reliability.
Data Source
AI summary
The present disclosure relates to a housing for a field device in measuring and automation technology for monitoring and/or determining at least one process variable of a medium, wherein the housing includes at least one housing body which has, in the interior thereof, a housing chamber which is defined by a housing wall, wherein the housing wall has at least one opening, into which opening a threaded element is inserted in a releasably fastened manner, which threaded element is set up to receive a cover, wherein the opening can be tightly closed by means of the cover.