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Method of manufacturing a curved measuring tube for a vibratory measurement sensor

A measurement sensor, bending measurement technology, applied in the direction of measuring flow/mass flow, measuring device, direct mass flowmeter, etc., can solve problems such as difficulties

Inactive Publication Date: 2009-12-16
ENDRESS HAUSER FLOWTEC AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, substantial difficulties also arise in the case of very small and very narrow thread diameters of the support realized in the initial tube

Method used

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  • Method of manufacturing a curved measuring tube for a vibratory measurement sensor
  • Method of manufacturing a curved measuring tube for a vibratory measurement sensor
  • Method of manufacturing a curved measuring tube for a vibratory measurement sensor

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Embodiment Construction

[0057] Figures 1 to 5 An in particular straight initial tube 1' with a predetermined in particular circular cross-section and an inner cavity is shown in side view, respectively. The initial tube 1' is to be transformed into a curved initial tube 1" having a predeterminable spatial shape by suitably introducing at least partly a bending force acting on it from the outside. Then as Figure 11 As shown, the bent initial tube 1 ″ is later used as a measuring tube 10 of the vibrating type, for example a measuring tube 1 of a Coriolis mass flow measuring sensor.

[0058] Before starting the actual deformation process, an initial tube 1' having a desired length L may be cut, for example, from a piece of tubular rod (not shown). The length L of the initial tube 1' is simply derived from the desired length of the initial tube 1" bent after bending. The initial tube 1' has a predetermined inner diameter dI and can be made of materials normally used for measuring tubes of said ty...

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Abstract

In order to manufacture the measuring tube, a first filling material ( 21 ) and a second filling material ( 22 ) added therein are formed inside the lumen of the starting tube ( 1 ′) to be bent and serve to stabilize the starting tube during bending. Solid shaped body (2) in cross-section of (1'). The first filling material (21) is a solidifying liquid, in particular paraffin, grease or water, whose melting temperature is lower than that of the initial tube (1'), while the second filling material (22) is at least in normal conditions substantially The poured, in particular granular and / or powdery loose material, especially granular material, sand, etc., has a melting temperature higher than that of the liquid (21). After creating the shaped body (2), the starting tube (1') is bent by introducing a bending force acting at least partially on the starting tube (1') from outside. Finally, the shaped body ( 2 ) inside the lumen of the bent starting tube ( 1 ″) is softened by melting the filling material ( 21 ) constituted as a solidified liquid inside the bent starting tube ( 1 ″).

Description

technical field [0001] The invention relates to a method for at least one measuring tube of a measuring sensor of the bending vibration type, in particular a Coriolis mass flow sensor. Background technique [0002] Vibration-type measurement sensors, such as Coriolis mass flow measurement sensors, Coriolis mass flow / density measurement sensors, and / or viscosity / density measurement sensors, etc., can be roughly divided into two categories according to the form of the measuring tube used, That is, a measuring sensor with at least one straight measuring tube and a measuring sensor with at least one curved measuring tube, wherein the curved measuring tube is bent at least partially in the shape of a bow. The measuring tube concerned with the present invention belongs to the latter. The structure as well as the function and application of such measuring sensors known to those skilled in the art are for example described in DE-A 4327 052, US-B 67 11 958, US-A 53 94 758, US-A 57 9...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/84B21D9/15G01F1/00
CPCB21D9/15
Inventor 雷纳·洛伦茨
Owner ENDRESS HAUSER FLOWTEC AG
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