Device, system, and method for analyzing transformer oil

Patent metadata

Field	Value
Publication number	US-2020355668-A1
Application number	US-201916405205-A
Country	US
Kind code	A1
Filing date	May 7, 2019
Priority date	May 7, 2019
Publication date	Nov 12, 2020
Grant date	—

Abstract

A system, device, and a method for determining a compound content in transformer oil are provided. The method includes positioning a syringe filled with transformer oil in the device to transfer the oil to a vial using the device. The device includes a stand, a threaded rod, a handle, a disc, and a syringe holder. The threaded rod is movable in a vertical direction by rotation of the handle and is configured to apply pressure via the disc on a plunger of the syringe positioned in the syringe holder to maintain an airtight connection between the vial and the device. The compound content is determined using a gas chromatograph by analyzing an aliquot extracted from a headspace gas of the vial.

First claim

1 . A method for determining a compound content in transformer oil, the method comprising:
collecting a sample of oil from an oil tank of a transformer using a syringe; purging a vial with an inert gas; positioning the syringe in a syringe holder of an oil transfer device; inserting a needle of the syringe into the vial creating an airtight connection between the oil transfer device and the vial; operating a handle of the oil transfer device to fill the vial with oil from the syringe; releasing the inert gas overpressure in the vial; positioning the vial in a headspace sampler; extracting an aliquot from a headspace gas of the vial; injecting the aliquot into a gas chromatograph; and determining the compound content by analyzing the aliquot using the gas chromatograph, wherein the oil transfer device includes a stand having an upper section, a base plate, and a frame, the threaded rod having a first distal end and a second distal end, the threaded rod being interconnected to the upper section of the stand via a supporting arm, the handle being connected to the first distal end of the threaded rod, a disc being connected to the second distal end of the threaded rod, and a syringe holder having an opening configured to hold a syringe in a vertical position and is connected to the frame of the stand, the threaded rod being movable in a vertical direction by rotation of the handle and is configured to apply pressure via the disc on a plunger of the syringe positioned in the syringe holder to maintain the airtight connection between the oil transfer device and the vial.

2 . The method of claim 1 , wherein purging the vial includes:
injecting the inert gas into the vial via a first needle, inserting simultaneously a second needle into the vial to release the inert gas overpressure, and removing the first and the second needle.

3 . The method of claim 1 , wherein the compound is Sulfur.

4 . The method of claim 1 , wherein the handle is connected to an electrical motor configured to rotate the arm to move the piston in the vertical direction.

5 . The method of claim 1 , wherein the syringe holder has an adjustable diameter.

6 . The method of claim 5 , wherein the syringe holder includes an exchangeable plate including the opening.

7 . The method of claim 6 , wherein the syringe holder further includes an iris mechanism for controlling a diameter of the opening, the iris mechanism including a plurality of leaves connected to a drive ring.

8 . The method of claim 6 , wherein the plate includes a plurality of openings, each opening having a different diameter.

9 . The method of claim 8 , wherein each of the openings includes an elastic sleeve.

10 . The method of claim 6 , wherein the plate includes a cut at a first side edge having a profile corresponding to a cross-section of the upper section of the stand.

11 . The method of claim 10 , wherein the cut has a rectangular shape.

12 . The method of claim 5 , wherein the adjustable diameter is in a range from 15 mm to 35 mm.

13 . The method of claim 1 , wherein the threaded rod has a lower section and an upper section, the upper section including an horizontal opening adapted to hold the handle in an horizontal position.

14 . The method of claim 1 , wherein the disc is covered with a rubber material.

15 . The method of claim 1 , wherein the frame has a U shape and includes two vertical support columns and a horizontal support column.

16 . The method of claim 1 , wherein the base plate includes a circular groove configured to hold the vial.

17 . A system for determining a compound content in transformer oil, the system comprising:
a syringe configured to be filled with transformer oil; a device including
a stand having an upper section, a base plate, and a frame,
a threaded rod having a first distal end and a second distal end, the threaded rod being interconnected to the upper section of the stand via a supporting arm,
a handle connected to the first distal end of the threaded rod,
a disc connected to the second distal end of the threaded rod, and
a syringe holder having an opening configured to hold the syringe in a vertical position and is connected to the frame of the stand, a vial; and
a gas chromatograph configured to receive an aliquot extracted from a headspace gas of the vial and to determine the compound content of the aliquot, wherein the threaded rod is movable in a vertical direction by rotation of the handle and is configured to apply pressure via the disc on a plunger of the syringe positioned in the syringe holder to fill the vial disposed on the base plate of the stand and to maintain an airtight connection between the device and the vial.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Rehman Shafiqur
• Alhems Luai M
• Jadim Ramsey

Classifications

• G01N2030/8854

  involving hydrocarbons · CPC title

• G01N30/16

  Injection (G01N30/24 takes precedence) · CPC title

• G01N33/287 Primary

  Sulfur content · CPC title

• H01F27/12

  Oil cooling · CPC title

• G01N2030/025

  Gas chromatography · CPC title