Pressure regulated method for preventing cavitations in a technical system

• US 20060133941A1
• Filed: 11/25/2003
• Published: 06/22/2006
• Est. Priority Date: 11/27/2002
• Status: Abandoned Application

• Current Assignee: Endress + Hauser GmbH + Company KG (Endress+Hauser AG)
• Original Assignee: Endress + Hauser GmbH + Company KG (Endress+Hauser AG)
• Inventors: Breithaupt, Hartmut
• Application Number:
  US10/536,452
• Publication Number:
  US 20060133941A1
• Time in Patent Office: Days
• US Class Current: 417/28
• CPC Class Codes: F04D 15/0022 throttling valves or valves varying the pump inlet opening or the outlet opening
• CPC Class Codes: F04D 29/669 especially adapted for liquid pumps F04D29/18 takes precedence
• CPC Class Codes: G05D 16/2066 using controlling means acting on the pressure source

Abstract

A pressure regulated method for a technical system that serves to prevent cavitations in a liquid medium, which is conveyed inside a conduit section consisting of a pump, a pressure sensor, a flowmeter and of a first valve. The pump pressure of the pump is regulated by the pressure sensor and the flowmeter in such a manner that the liquid pressure does not fall below the vapor pressure of the medium.

Claims

1-3. -3. (canceled)

4. A pressure control method for a technical system, for preventing cavitation in a liquid medium which is transported in a section of piping, the system comprising a pump, a pressure sensor, a flow rate meter, and a first valve (4), the method comprising the step of:

controlling the pump pressure of the pump with the pressure sensor and the flow rate meter such that the liquid pressure does not sink below the vapor pressure.

5. The pressure control method as claimed in claim 4, wherein:

a second valve is arranged parallel to the first valve, said method further comprising the step of;

alternately opening and closing the two valves.

6. The pressure control method as claimed in claim 4, wherein:

a buffer container, with the second valve and the pressure sensor, is arranged between pump and flow rate meter, said method further comprising the steps of;

registering the headspace pressure in the buffer container;

controlling the head space pressure with the second valve; and

actuating the second valve by the flow rate meter and the pressure sensor.