RU2633301C1 - Device for installing long-acting comparison electrode with potential sensor - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: device for installing a long-acting comparison electrode with potential sensor comprises a vertically oriented hollow tube with a bevelled lower edge, a cover arranged on the upper end of the tube, and a holder fixed to the cover and arranged inside the tube, and configured to place the comparison electrode with potential sensor on its end. The holder can be made in the form of a cord or a stem or a rod made of polymeric materials resistant to action of destructive factors. The tube is made of polymeric dielectric materials resistant to action of destructive factors. The cover can be fixed on the upper end of the tube by a movable connection.

EFFECT: protection of underground metal structures against corrosion.

5 cl, 1 dwg

Description

The invention relates to the field of protection of underground metal structures, for example pipelines, from corrosion, and in particular to the device of elements of a cathodic protection station.

The method of measuring the polarization potential with a permanently installed auxiliary electrode of long duration is by far one of the most common methods that give results close to the real values of the potential of pipeline networks. Such results are achieved if a stationary reference electrode is installed as close as possible to the measurement object under cathodic polarization, since the polarization potential is measured on an auxiliary sample simulating an insulation defect placed in the same electrolytic medium and under the same conditions as the metal construction. The reference electrode in the practice of anticorrosion protection in soil electrolytes is a non-polarizing long-acting copper-sulfate electrode with an electrochemical potential sensor.

Long-term practice of diagnostic work shows that the viability of long-acting reference electrodes is limited to 1-3 years, with the claimed 10-12 years. The reasons for the failure of long-acting electrodes are leaks of copper sulfate, loose sealing of the body of the electrode itself, and deposition of hydrated iron oxide on the potential sensor, which leads to incorrect measurement results. Electrodes, as a rule, are installed directly in the thickness of the soil near the control and measurement column of the cathodic protection station. To replace or repair electrodes in such an installation, it becomes necessary to carry out earthmoving operations, use additional equipment and work resources. Unscheduled repair or replacement of failed long-acting electrodes leads to changes in the schedules for commissioning, later commissioning of electrochemical protection equipment, additional costs for the dismantling of the electrodes, and distraction of working personnel to unplanned measures to eliminate comments.

The objective of the present invention is to provide a device, using which the labor of replacing or repairing a long-acting comparison electrode with a potential sensor is minimized and can be realized by one employee of the corrosion protection service.

The technical result consists in simplifying the procedure for replacing or repairing a long-acting comparison electrode with a potential sensor included in a cathodic protection station.

The technical result is achieved due to the fact that the device for installing a long-acting comparison electrode with a potential sensor comprises a vertically oriented hollow pipe with a beveled lower edge, a cover located on the upper end of the pipe, and a holder arranged to be placed on the cover and placed inside the pipe its end of the reference electrode with a potential sensor. The holder can be made in the form of a cord, or rod, or rod made of polymeric materials that are resistant to destructive factors. The pipe is made of polymer dielectric materials that are resistant to destructive factors. The cap can be fixed on the upper end of the pipe with a movable joint.

The invention is illustrated in the drawing, in which the positions indicated:

1 - pipe with a beveled edge,

2 - metal protected design,

3 - cover

4 - holder

5 - reference electrode,

6 - potential sensor,

7 - control and measuring column.

A device for installing a long-acting comparison electrode with a potential sensor is a vertically oriented hollow pipe 1 with a chamfered lower edge located at a minimum distance from the metal structure to be protected 2. The pipe 1 is made of polymer dielectric materials and has a diameter that allows the reference electrode to be removed freely potential from the device for repair or replacement. A hole can be made in the pipe for outputting wires from the reference electrode and the potential sensor from the device. The device includes a cover 3 located on the upper end of the pipe 1. The cover 3 can be fixed on the upper end of the pipe 1 with a movable connection. The presence of the cover 3 prevents the ingress of atmospheric precipitation, debris and foreign objects that may interfere with the removal of the reference electrode and potential sensor. A holder 4 is fixed on the lower side of the lid 3, at the opposite end of which a reference electrode 5 with a potential sensor 6 is placed. The reference electrode in the upper part can be equipped with fasteners from a metal strip in the form of a clamp with holes for fixing the holder to it. The holder 4 can be made in the form of a cord, rod, rod, etc. The holder 4 is made of polymeric materials resistant to the effects of destructive factors.

The inventive device is installed near the control and measurement column 7 of the cathodic protection station or directly inside the control and measurement column 7 with wires to it from the potential sensor 6 and directly from the reference electrode 5. Installation of the device takes place during construction, reconstruction, overhaul or the process of drilling operations.

The chamfered lower edge of the vertically oriented pipe 1 of the device allows you to place the potential sensor 6 and the reference electrode 5 in direct contact with the ground, leaving free space above them, which allows access to the potential sensor 5 and the reference electrode 6 without the use of earthmoving equipment and additional labor costs.

The operation of the device. To remove the exhausted or failed reference electrode 5 with the potential sensor 6, open the lid 3 and, using the holder 4 attached to it, remove the failed reference electrode 5 with the potential sensor 6.

To establish reliable contact between the potential sensor and the reference electrode with the ground, it is recommended to deepen the reference electrode until it contacts the ground, then fill the device with water to the level of the upper boundary of the reference electrode.

Claims (5)

1. A device for installing a long-acting comparison electrode with a potential sensor, comprising a vertically oriented hollow pipe with a beveled lower edge, a cover located on the upper end of the pipe, and a holder fixed to the cover and placed inside the pipe, arranged to accommodate a comparison electrode on its end with a potential sensor. 2. The device according to p. 1, characterized in that the holder is made in the form of a cord, or rod, or rod. 3. The device according to claim 1, characterized in that the holder is made of polymeric materials that are resistant to destructive factors. 4. The device according to claim 1, characterized in that the pipe is made of polymer dielectric materials that are resistant to destructive factors. 5. The device according to p. 1, characterized in that the cover is fixed on the upper end of the pipe by a movable connection.

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