Form seal, seal arrangement and process sensor with such a sealing arrangement

Abstract

A form seal for sealing an annular gap between an outer peripheral wall and an inner peripheral wall with respect to a medium comprises: an elastic, annular sealing body (3) to be radially clamped in, with an annular, outer radial sealing face (32) for lying in contact with the outer peripheral wall (2), an annular, inner radial sealing face (31) for lying in contact with the inner peripheral wall (1), an annular, media-side top face (33), which extends between the outer radial sealing face and the inner radial sealing face, an annular bottom face (34), which extends between the outer sealing face and the inner sealing face on the side remote from the top face (33), and at least one annular recess (36) in the bottom face for receiving an anchoring ring (44), the recess having at least one undercut.

Description

technical field [0001] The present invention relates to a formed seal, a seal arrangement, and a process sensor having such a seal arrangement. Background technique [0002] Various process sensors comprise an at least segmentally cylindrical outer element and an inner element arranged coaxially, between which an annular gap or an annular space that seals a medium-conducting space. In the simplest case, the annular gap can be closed with a sealing ring clamped between the cylindrical elements. However, if the annular gap exceeds a certain width, O-rings are impractical, and for example a dimensionally stable sealing support can be arranged between the inner element and the outer element; in this case, the sealing support has an outer sealing seat and Inner seal seats, wherein a seal ring is disposed in each seal seat for sealing the seal support relative to the outer and inner elements. Such a sealing arrangement is used, for example, in the applicant's conductivity sensor...

AI Technical Summary

Problems solved by technology

Although this sealing arrangement basically serves its purpose, it has limitations. First, the sealing function must be guaranteed at the four peripheral sealing seams; second, it must prevent the formation of gaps along these four sealing seams; third, Care must be taken that the seal ring is not sucked out of the seal seat in the case of low pressure on the medium side, resulting in leakage; fourth, the material of the seal support must be suitable for the process medium

These limitations result in complex construction and / or installation steps

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