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Protective tube for insertion into pipe or container with reduced sensitivity to vortex-induced vibrations

A technology for protecting pipes and pipes, applied in the direction of thermometers, temperature measurement of moving fluids, pipes/pipe joints/fittings, etc., with electrical/magnetic elements directly sensitive to heat

Pending Publication Date: 2022-08-02
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has proven difficult to fit the supports or shock absorbers in such a way that a high level of coupling and thus the desired effect can be achieved

Method used

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  • Protective tube for insertion into pipe or container with reduced sensitivity to vortex-induced vibrations
  • Protective tube for insertion into pipe or container with reduced sensitivity to vortex-induced vibrations
  • Protective tube for insertion into pipe or container with reduced sensitivity to vortex-induced vibrations

Examples

Experimental program
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Effect test

Embodiment Construction

[0038] figure 1The origin of the vortex shedding w is shown at a cylindrical, conically tapered protective tube 1 exposed to a flowing medium M in a duct 2 indicated by one of its walls. Downstream of the protective tube 1 in the medium flow direction v, a ridge-like pattern is formed. Depending on the flow velocity v of the medium M, this may lead to coherent vortex shedding, which in turn may cause the protection tube 1 to vibrate.

[0039] These vibrations are mainly due to two forces acting on the protective tube 1, namely the shear force in the y-direction and the lifting force in the x-direction. The shear force induces a frequency f s , and the lifting force induces a frequency of 2f s oscillation. frequency f s Now depends on the flow rate v of the medium M and on various physical or chemical medium properties, such as the viscosity and density of the medium, and on the dimensions of the protective tube 1, such as the diameter and length of the protective tube. ...

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PUM

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Abstract

The present invention relates to a protective tube for insertion into a pipe or container with reduced sensitivity to vortex-induced vibrations. The invention relates to a method for producing a protective tube (1) for insertion into a pipe or container (2) containing a medium (M), the protective tube (1) comprising a tubular member (5) having a bore (6) extending between an upper end (5a) and a lower end (5b) of the tubular member (5) wherein the method comprises the following steps: providing a preformed element (5), the preform element includes a coiled wire having at least one turn; arranging the preform element (5) around the outer surface of the tubular member (5); and welding the preformed element on the outer surface (S) of the tubular member (5).

Description

technical field [0001] The present invention relates to a method of producing a protective tube for insertion into a pipe or container containing a medium. Background technique [0002] In the technical field of measurement inserts for determining and / or monitoring process variables of a medium, protective tubes, for example in the form of thermowells for thermometers for determining and / or monitoring a medium are known temperature. The measuring insert of a thermometer usually includes at least one temperature sensor for determining and / or monitoring the temperature of the medium. The temperature sensor in turn comprises at least one temperature-sensitive component, eg in the form of a resistive element, in particular a platinum element, or in the form of a thermocouple. However, protective tubes in combination with gas sampling probes are also known, in which a gas sample is withdrawn, in particular dynamically, from a pipe or container. Accordingly, the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00G01K7/02G01K1/08
CPCB23P15/00G01K7/02G01K1/08G01K13/02G01P5/165B23K31/027F15D1/10F16L55/07G01F1/46
Inventor 马西莫·德尔比安科
Owner EHNDRESS KHAUZER GMBKH KO KG
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