Protective tube device for protecting a temperature sensor against contact with a fluid

Patent metadata

Field	Value
Publication number	US-9958337-B2
Application number	US-201514817243-A
Country	US
Kind code	B2
Filing date	Aug 4, 2015
Priority date	Aug 6, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A protective tube device can protect a temperature sensor against contact with a fluid, and has a distal end containing the temperature sensor and has an outer wall provided for contact with the fluid, and a proximal end which is connected to the temperature sensor by electric lines and is intended for arrangement outside the fluid, wherein, on the outer wall of the distal end, an elastic membrane closes off a resultantly defined pressure transmission fluid reservoir in a fluid-impermeable manner, the pressure transmission fluid reservoir being connected fluidically by a fluid channel running within the protective tube device to a pressure sensor arranged in the proximal end.

First claim

The invention claimed is:

1. A protective tube device for protecting a temperature sensor against contact with a fluid, the device comprising:
a distal end including the temperature sensor and including an outer wall configured to contact the fluid; and
a proximal end, connected to the temperature sensor by one or more electric lines, suitable for arrangement outside the fluid,
wherein, on the outer wall of the distal end, the outer wall includes an elastic membrane that closes off a pressure transmission fluid reservoir in a fluid-impermeable manner,
wherein the pressure transmission fluid reservoir is defined by the elastic membrane and the outer wall,
wherein the pressure transmission fluid reservoir is connected fluidically by a fluid channel to a pressure sensor arranged in the proximal end,
wherein the fluid channel runs within the protective tube device,
wherein the outer wall of the distal end includes a depression in a region closed off by the elastic membrane, thereby increasing a volume of the pressure transmission fluid reservoir, and
wherein an edge of the depression is of oval shape.

2. The device of claim 1 , wherein the outer wall of the distal end has a substantially circular cross section.

3. The device of claim 1 , having a smaller cross sectional area in a distal region of the distal end than in a proximal region of the distal end.

4. The device of claim 1 , wherein the pressure transmission fluid reservoir and the fluid channel include a pressure transmission fluid comprising an oil, silicone fluid, water, a further incompressible liquid, or a mixture of two or more of any of these.

5. The device of claim 1 , further comprising:
a flow shield, arranged at least in the region of the elastic membrane,
wherein the flow shield is configured to protect the membrane against dynamic pressure of flows of the fluid.

6. The device of claim 5 , wherein the flow shield is hollow-cylindrical, and
wherein the flow shield at least partially laterally surrounds the distal end of the device.

7. The device of claim 5 , wherein the flow shield ends with the device in a region proximal to the elastic membrane.

8. The device of claim 5 , wherein the flow shield is fastened exchangeably to the device.

9. The device of claim 5 , wherein the flow shield is hollow-cylindrical, and
wherein the flow shield laterally surrounds the distal end of the device.

10. The device of claim 5 , wherein the flow shield is fixed exchangeably to the device.

Assignees

• Abb Technology Ag
• Abb Schweiz Ag

Inventors

• Sosale Guruprasad
• Pozzi Andrea
• Szasz Paul
• Scholl Thomas
• Daake Wilhelm

Classifications

• G01K1/08 Primary

  Protective devices, e.g. casings · CPC title

• G01L19/0645

  using isolation membranes, specially adapted for protection · CPC title