RU1643U1 - DEVICE FOR CLEANING THE INTERNAL SURFACE OF PIPES - Google Patents

Abstract

1. DEVICE FOR CLEANING THE INTERNAL SURFACE OF PIPES, containing a switching power supply, the poles of which are connected to electrodes of an electro-hydraulic radiator, the positive pole of the source being connected to the first electrode made in the form of an insulated core of a cable placed in the pipe, characterized in that the second electrode is made in view of another cable core. 2. The device according to claim 1, characterized in that the cable is made of a coaxial design in which the central core is the first electrode and the external core is the second electrode.

Description

5 OOi, SL DEVICE FOR CLEANING THE INTERNAL SURFACE OF PIPES

The invention relates to techniques for cleaning the surfaces of products from contamination using electro-hydraulic shock and can be used to clean heat exchangers or pipelines in the energy, chemical and metallurgical industries.

During operation, the inner surfaces of the pipes are contaminated with various deposits, which impair the performance of the apparatus in which they are used. Various methods and devices are used to remove deposits.

A device for cleaning the inner surfaces of pipes 1, which contains two electro-hydraulic emitters, including two electrodes, partially coated with insulation, as well as pressure sensors associated with the block recording equipment. The disadvantage of this device is the low quality of cleaning of long pipes due to the limited radius of action of the emitters, as well as low productivity and low-tech cleaning, since it is necessary to dismantle the contaminated pipes and immerse them in a special bath.

A device for cleaning the inner surfaces of pipes 23, which contains a pulse current source and two electrodes. One electrode is made in the form of the bare part of the cable core, placed in the pipe and connected to the positive pole of the current source. The role of the second electrode is performed by the pipe being cleaned, which is connected to the negative pole of the source and is grounded. In this device, an electrical discharge

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MKI F 28 G 7/00, 08 V 3/10, 7/00

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occurs with the HOUSING of the cable on the inner wall of the pipe, resulting in intense erosion of the wall, on which roughness appears after cleaning. After putting the heat exchanger into operation, the rough surface of the pipe walls is quickly covered with scale and other deposits. Some pipes are coated on the inside with a special coating, for example fluoroplastic, to reduce roughness, or to be sewn from corrosion. When cleaning such pipes with a known device, this coating is damaged, which is unacceptable.

The basis of the present, of his invention, is the task of creating such a device for cleaning the inner surface of pipes, which eliminates the destruction and damage of the pipe stbnok during the cleaning process.

The problem is solved in that in the device for cleaning the inner surface of the pipes, it contains a pulsed power supply, the poles of which are connected to the electrodes of the electro-hydraulic emitter, and the positive pole is connected to the first electrode, made in the form of an insulated cable core, placed in the pipe, the electro-hydraulic emitter is made in the form of another cable .. For pipes of circular cross-section, the coaxial cable design is optimal, in which the central core is the first the third electrode, and the outer core (braid) - the second electrode.

In the proposed technical solution, an electric discharge to create an electro-hydraulic shock occurs not between the electrode and the pipe wall, but between the two cores of the cable, which prevents damage to the pipe wall.

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The device contains a pulse power supply 1., Including a step-up transformer 2, a rectifier 3, a capacitor bank 4, a spark gap 5. The positive pole of the power supply 1 is connected to an insulated core of cable 7. The negative pole of the power source 1 is connected to another core 8 of the cable. The cable is placed in the cavity of the cleaned pipe 9, the inner surface of which is covered with scale and various deposits 10.

The device operates as follows. Through the pipe 9, into which the cable 7 is placed, the working fluid (process water) is pumped. An electric discharge is created between the cores 6 and 8 of the cable, and shock waves are generated in the liquid, which destroy and grind scale and other deposits 10. The water flow brought to the pipe flushes the crushed scale out of it, and the cable moves inside the pipe as the scale breaks down .

Thus, the proposed device for cleaning the inner surface of the pipe helps to prevent destruction and damage to the surface of the pipe walls during the cleaning process.

The present invention can be used to clean the inner surface of the pipes used in various technological processes in heat exchangers.

Information sources:

1.A. from. USSR N 1315037, MKI Yu8 B 9/00, F 28 G 7/00, priority 15. 05. 84.

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Claims (2)

1. DEVICE FOR CLEANING THE INTERNAL SURFACE OF PIPES, containing a switching power supply, the poles of which are connected to electrodes of an electro-hydraulic radiator, the positive pole of the source being connected to the first electrode made in the form of an insulated core of a cable placed in the pipe, characterized in that the second electrode is made in view of another cable core.  2. The device according to claim 1, characterized in that the cable is made of a coaxial design, in which the central core is the first electrode and the external core is the second electrode.