Independent pressure monitoring switch element

Patent metadata

Field	Value
Publication number	US-11101089-B2
Application number	US-201916446879-A
Country	US
Kind code	B2
Filing date	Jun 20, 2019
Priority date	Jun 22, 2018
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A pressure element for monitoring a fluid being applied to the pressure element, wherein the pressure element is configured to close an electrical circuit, as a result of a change in pressure which the fluid exerts on the pressure element, independently of an absolute value of the pressure, where the fluid preferably flows through a pipeline.

First claim

What is claimed is:

1. A pressure element for monitoring a fluid being applied to the pressure element, the pressure element comprising:
an electrical circuit;
wherein the pressure element is configured to close the electrical circuit, as a result of a change in pressure which the fluid exerts on the pressure element, independently of an absolute value of the pressure; and
wherein the fluid flows through a pipeline.

2. The pressure element as claimed in claim 1 , wherein the pressure element is configured to close the electrical circuit automatically when the change in pressure of the fluid occurs, without utilizing an external electrical energy source.

3. The pressure element as claimed in claim 2 , wherein the pressure element is configured to close the electrical circuit when a threshold value according to an amount of the change in pressure of the fluid is exceeded.

4. The pressure element as claimed in claim 1 , wherein the pressure element is configured to close the electrical circuit when a threshold value according to an amount of the change in pressure of the fluid is exceeded.

5. The pressure element as claimed in claim 1 , further comprising:
a switching element; and
at least one flexible diaphragm having a connection to the switching element such that a movement of the diaphragm leads to a movement of the switching element to close the electrical circuit upon a corresponding movement of the diaphragm.

6. The pressure element as claimed in claim 5 , further comprising:
a first switching element;
a first flexible diaphragm having a connection to the first switching element such that, as a result of a positive change in pressure of the fluid, the first diaphragm and the first switching element are moved such that the electrical circuit is closed;
a second switching element; and
a second flexible diaphragm having a connection to the second switching element such that, as a result of a negative change in pressure of the fluid, the second diaphragm and the second switching element are moved such that the electrical circuit is closed.

7. The pressure element as claimed in claim 6 , further comprising:
an overload apparatus which is configured to prevent an excess mechanical loading on the at least one diaphragm.

8. The pressure element as claimed in claim 6 , further comprising:
at least a first chamber and a second chamber;
wherein the diaphragm and the switching element are arranged in a central region between the first and second chambers.

9. The pressure element as claimed in claim 5 , further comprising:
an overload apparatus which is configured to prevent an excess mechanical loading on the at least one diaphragm.

10. The pressure element as claimed in claim 9 , further comprising:
at least a first chamber and a second chamber;
wherein the diaphragm and the switching element are arranged in a central region between the first and second chambers.

11. The pressure element as claimed in claim 5 , further comprising:
at least a first chamber and a second chamber;
wherein the diaphragm and the switching element are arranged in a central region between the first and second chambers.

12. The pressure element as claimed in claim 11 , further comprising:
at least one additional third chamber, which has a first opening to the first chamber and a second opening to the second chamber;
wherein the first and second openings have flow cross-sections which differ from one another.

13. The pressure element as claimed in claim 11 , wherein the diaphragm has an opening for a fluid to flow through.

14. The pressure element as claimed in claim 11 , further comprising:
a compressible deforming facility arranged in the first chamber and configured to reversibly change volume as a function of a pressure exerted upon said compressible deforming facility.

15. The pressure element as claimed in claim 14 , wherein the compressible deforming facility is a deforming body.

16. The pressure element as claimed in claim 14 , wherein the compressible deforming facility has a subchamber which is separated from the first chamber from a flow perspective and comprises a spring and a piston; and
wherein the piston is configured to exert a force on the spring when a force is exerted upon said piston, such that a volume of the subchamber and thus of an entire volume of the compressible deforming facility is reversibly altered.

17. The pressure element as claimed in claim 14 , wherein the compressible deforming facility comprises a bellows structure which is reversibly compressible when pressure of the fluid being applied to the pressure element changes.

18. The pressure element as claimed in claim 1 , further comprising:
a flexible separating diaphragm which is configured such that the fluid is applicable to a first side of the separating diaphragm, and a fluid situated within the pressure element is applicable to a second side of the separating diaphragm.

19. A pipeline, through which a fluid flows, and which include at least one pressure element as claimed in claim 1 , which is connected to the pipeline.

20. A pressure surge detection unit, comprising the pressure element as claimed in claim 1 and a control unit, which is configured to record a closing of the electrical circuit of the pressure element.

21. A pressure surge monitoring system for pipelines through which fluid flows, comprising a plurality of pressure elements as claimed in claim 1 and at least one control unit, which is configured to record a closing of the electrical circuit of the pressure element.

22. The pressure element as claimed in claim 1 , wherein the pressure element monitors a pipeline through which fluid flows.

Assignees

• Siemens Ag

Inventors

• Klehr Stefan

Classifications

• G01L9/0044

  Constructional details of non-semiconductive diaphragms · CPC title

• G01L9/0041 Primary

  Transmitting or indicating the displacement of flexible diaphragms · CPC title

• H01H35/34 Primary

  actuated by diaphragm · CPC title

• G01L9/0089

  Transmitting or indicating the displacement of pistons by electrical, electromechanical, magnetic or electromagnetic means (G01L9/0008 takes precedence) · CPC title

• F17D5/00

  Protection or supervision of installations (arrangements for protecting foundations E02D31/00; protecting pipes from damage or internal or external wear F16L57/00, against corrosion and scale F16L58/00; investigation of the fluid-tightness of structures G01M3/00) · CPC title