Floating body flowmeter

Abstract

A floating body flowmeter having a measuring tube (1) which is positioned vertically and through which a substance (2) to be measured flows, in which tube a floating body (3) is arranged in order to determine the flow rate, the rise height (h) of said body relative to the measuring tube (1) being in a defined relationship with the flow rate, it being possible for the measuring range to be adjusted at least via the density of the floating body (3), and the floating body (3) being heterogeneous in such a way that the latter consists of an industrial mass-produced material in the core (4), the material selection being coordinated with the fact that the measuring range can be adjusted substantially via the density of the core (4), and the core (4) is provided with an external coating (5), its material being coordinated with the fact that this is chemically and/or mechanically resistant to the substance to be measured, and furthermore that all the other parts in contact with the substance to be measured are coated so as to be resistant to the substance to be measured.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Further measures improving the invention will be explained in more detail below together with the description of exemplary embodiments of the invention, by using figures, in which:

FIG. 1 shows an exemplary floating body flowmeter having a conical measuring tube, and

FIG. 2 shows an exemplary floating body flowmeter having a conical floating body.

Claims

1. A floating body flowmeter comprising a measuring tube which is positioned vertically and through which a substance to be measured flows, in which tube a floating body is arranged in order to determine the flow rate, the rise height (h) of said body relative to the measuring tube being in a defined relationship with the flow rate, the measuring range being adjustable at least via the density of the floating body, wherein the floating body is heterogeneous in such a way that the latter consists of an industrial mass-produced material in the core, the material selection being coordinated with the fact that the measuring range can be adjusted substantially via the density of the core, andthe core is provided with an external coating, its material being coordinated with the fact that this is chemically and/or mechanically resistant to the substance to be measured, and furthermore that all the other parts in contact with the substance to be measured are coated so as to be resistant to the substance to be measured.

2. The floating body flowmeter as claimed in claim 1, wherein the resistant coating is formed as a plastic coating, nitrate coating or ceramic coating.

3. The floating body flowmeter as claimed in claim 2, wherein the coating is applied by means of vapor deposition or spraying onto the surface of the core.

4. The floating body flowmeter as claimed in claim 2, wherein, in the case of a metallic core, the coating is applied by means of electroplating.

5. The floating body flowmeter as claimed in claim 1, wherein the mass-produced material is a plastic.

6. The floating body flowmeter as claimed in claim 1, wherein the mass-produced material is a metal.

7. The floating body flowmeter as claimed in claim 1, wherein the core consists of a single material or of a material combination.

8. The floating body flowmeter as claimed in claim 7, wherein the core consisting of a material combination contains a permanent magnet, in order to implement an inductive distance measurement on the measuring tube.

9. The floating body flowmeter as claimed in claim 1, wherein the measuring tube consists of a transparent material, in order to implement a direct optical distance measurement on the measuring tube (1).

10. The floating body flowmeter as claimed in claim 9, wherein the core of the floating body is formed in the manner of a hollow body in order to create a supplementary possibility for adjusting the measuring range.

11. The floating body flowmeter as claimed in claim 10, wherein the measuring tube is shaped so as to be internally conical, tapering counter to the flow direction of the substance to be measured.

12. The floating body flowmeter as claimed in claim 10, wherein the measuring tube contains an orifice plate, with which an at least partly conically tapered floating body interacts.

13. The floating body flowmeter as claimed in claim 1, wherein the coating is applied by means of vapor deposition or spraying onto the surface of the core.

14. The floating body flowmeter as claimed in claim 1, wherein, in the case of a metallic core, the coating is applied by means of electroplating.

15. The floating body flowmeter as claimed in claim 5, wherein the mass-produced material is selected from a material group comprising: polypropylene, polyethylene, polyvinyl chloride.

16. The floating body flowmeter as claimed in claim 6, wherein the mass-produced material is selected from a group of materials comprising: iron, aluminum, lead or alloys thereof.

17. The floating body flowmeter as claimed in claim 1, wherein the measuring tube is shaped so as to be internally conical, tapering counter to the flow direction of the substance to be measured.

18. The floating body flowmeter as claimed in claim 1, wherein the measuring tube contains an orifice plate, with which an at least partly conically tapered floating body interacts.