Browse Prior Art Database

TRANSPORTABLE AIR REMOVAL KIT WITH FLUID FLOW UNDER VACUUM PRESSURES MEANT FOR FIELD USE

IP.com Disclosure Number: IPCOM000234645D
Publication Date: 2014-Jan-24
Document File: 7 page(s) / 205K

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention proposes an air removal kit for X-ray tubes. The kit uses a combination of fluid motion and vacuum pressures to remove entrapped air. Air removal kit architecture includes a positive displacement (PD) pump to pull fluid from the system from which air is to be removed from fluid. The PD pump is used for pumping fluid into an open air tank. A fluid line is also configured in the tank, but not near the pump output. The fluid line is connected to the opposite end of the system. In series with the outgoing fluid line is a valve. The valve has capability of completely blocking the flow.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

TRANSPORTABLE AIR REMOVAL KIT WITH FLUID FLOW UNDER VACUUM PRESSURES MEANT FOR FIELD USE

FIELD OF INVENTION

The invention generally relates to an X-ray tube and more particularly to a technique for removing air from X-ray tube oil which is in field use.

BACKGROUND OF THE INVENTION


Generally, air removal process for X-ray tubes requires a long time and often proves to be ineffective. Conventional kits for air removal rely on fluid motion to remove entrapped air. For example, in certain CT systems, tilting the gantry aids in air removal process. FIG. 1 depicts CT gantries which tilt by +- 30 degrees. Tilt of gantry moves air bubbles towards exit. The tilt of gantry coupled with slow rotation sufficiently purges air from VCT gantry tubes.

FIG. 1

However, for non tilting gantries, this air removal process is found to be ineffective to solve image quality problems.

Another conventional technique includes a positive displacement (PD) pump to push oil into the system. FIG. 2 depicts a pump in air-removal kit with reservoir that allows some air/oil separation. Inlet/exit is designed in middle of geometry. Air bubbles are above the flow line. With rotation, some air is removed to a geometry defined limit.

FIG. 2

However, oil pumping results in a pressure increase in the trapped air, which further traps the oil.

Yet another conventional technique includes large size pump to increase flow rate. Higher turbulence aids in freeing trapped air bubbles. FIG. 3 depicts large size pump with much larger flow rate.

FIG. 3

However, higher flow rates require higher pressures within the system which counteracts ability of trapped air to be removed. Higher flow rates also require larger pumps and oil tanks which makes the kit less portable. Overall, higher flow rates is found to be more effective than the conventional air removal kits, but has its own limitations which does not solve the problem.

Hence there exists a need for an efficient kit that provides air removal from X-ray tubes.

BRIEF DESCRIPTION OF THE INVENTION

The invention proposes an air removal kit for X-ray tubes. The kit uses a combination of fluid motion and vacuum pressures to remove entrapped air. Air removal kit architecture includes a positive displacement (PD) pump to pull fluid from the system from which air is to be removed from fluid.

DETAILED DESCRIPTION OF THE INVENTION

The invention proposes an air removal kit for X-ray tubes. The kit uses a combination of fluid motion and vacuum pressures to remove entrapped air. Air removal kit architecture includes a positive displacement (PD) pump to pull fluid from the system from which air is to...