RU1796285C - Method of cleaning pipe internal surface - Google Patents

Abstract

Usage: cleaning the inner surface of pipes and tubular products. SUMMARY OF THE INVENTION: a method of cleaning the inside of a pipe, which comprises exposing a fluid-filled inside of a pipe to pulsed electric discharges. Additionally, a source of alternating pressure is applied to the liquid with a frequency equal to the pulsation frequency of the electric explosive cavities. 1 ill.

Description

The invention relates to a cleaning technique for cleaning the inner surface of pipes and tubular products.

Closest to the invention, the achieved result is an electric-discharge method for cleaning the inner surface of pipes by exposing the inner fluid-filled cavity to pulsed electric discharges 1.

However, this method has insufficiently high productivity and quality of cleaning.

The purpose of the invention is to increase the productivity and quality of cleaning the inner surface of pipes.

The goal is achieved in that in the known method of cleaning the inner surface of the pipes by exposing the fluid to the internal cavity of the pipe with pulsed electric discharges, the liquid in the pipe is additionally exposed to an alternating pressure source with a frequency equal to the pulsation frequency of the electric explosive cavities.

The drawing shows a device for implementing the proposed method.

The device comprises a high-voltage pulse generator (not shown) connected through the central core of the coaxial cable 1 to the positive electrode 2. A pump 4 serving as a source of external alternating pressure is connected to the pipe to be cleaned 3, which injects liquid into the pipe in portions with a frequency equal to the pulsation frequency of the electric explosive cavities.

The cleaning of the inner surface of the pipeline is as follows. A positive electrode 2 is introduced into the cleaned pipe 3 filled with water and connected to the pump 4, connected by a cable 1 to a pulse current generator. They include a pump, 4.and a pulse current generator. The electroexplosive conversion of electrical energies causes the generation of an electroexplosive cavity (cavity) and a cavitating ring from a plurality of cavitation bubbles surrounding it. Under influence

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of external alternating pressure with a frequency equal to the pulsation frequency of electric blasting cavities, the cumulative effect sharply intensifies when cavitation bubbles coalesce, and especially an electric blasting cavity with the formation of a cumulative jet directed to the pipe wall and shock waves acting on the surface being cleaned.

In addition, external variable pressure by creating a pulsating fluid flow significantly improves the process of removal of sludge from the pipe, preventing jamming of the working cable and stabilizing electrodischarge processes.

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The pulsation frequency of electroexplosive cavities is determined experimentally by piezoelectric pressure sensors attached to the outer surface of the pipe, the electrical signal from the sensors controlling the synchronization of the electrodischarge device with the pulse pump.

The proposed method for cleaning the inner surface of pipes increases the efficiency of the cleaning process by transforming the energy of an external variable pressure source into the energy of cumulative jets, shock waves and hydroflow, which produce cleaning.

Claims (1)

The claims The method of cleaning the inner surface of the pipe by exposing the inner fluid-filled cavity of the pipe to pulsed electric discharges from /, characterized in that, in order to increase the productivity and quality of cleaning, the liquid is additionally affected by a source of alternating pressure with a frequency equal to the pulsation frequency of electric explosive cavities.