SU937063A1 - Apparatus for cleaning pipeline interior surface - Google Patents

Description

The invention relates to the cleaning of the internal surface of pipelines of various deposits and can be used to clean oil pipelines, oil pipelines, etc.

A device for cleaning the internal surface of pipelines is known, which consists of a cavitation exciter and a spin-around 1 connected to it.

However, the known device does not provide sufficient cavitation, since with the passage of liquid cavitation is observed only in a narrow section at the outlet of the cavitation exciter.

The purpose of the invention is to increase the cleaning efficiency.

The goal is achieved by the fact that a device for cleaning the internal surface of pipelines, consisting of a cavitation exciter and a spinner connected to it, has plate-type electrodes with a power source, and a longitudinal channel, in which plate electrodes are radially positioned, is formed with inner surface.

cleaned pipeline annular venturi pipe.

Figure 1 shows the proposed device, a longitudinal section; figure 2 is a variant of the device with the filing of the abrasive slurry through the pipeline into the housing; on fig.Z - seal joint of the reflector and the inner surface of the pipe; figure 4 - cross section

10A-tA in FIG. 2

The device consists of a cavitation exciter 1, along the axis of which a longitudinal channel 2 is made. In the channel 2 of the radialio are lamellar

15, the electrodes 3, connected 1e to the source of direct current by wires 4 and fastened on both sides by rings with slits 5 from a dielectric material in such a way that the alternation of potentials takes place. The fairing 6 forms an annular gap with the inner surface of the pipeline 7 in the form of a Venturi pipe. The annular gap contains a narrowing

25 8, cylindrical 9 and races iup ykpk from 10 parts.

Cavitation causative agent 1 has on its outer surface an elastic seal 11 connected by openings 12

30 and channels 13 with fluid flow.

The device according to the second variant (Fig. 2) has a pipeline 14 connected to the longitudinal channel 2 for supplying an abrasive or chemically active suspension, and a reflector 15. There is an elastic seal between the reflector and the inner surface of the pipeline. An additional thrust is provided by the pressure of the fluid supplied through. holes 12 to the channels 13.

The device works as follows;

The working fluid under pressure into the exciter 1 cavitation through channel 2. When the working fluid passes through channel 2, in which the plate electrodes 3 are radially located, the process 4 is connected to the source of direct current by wires 4 and fastened on both sides with slits 5 of dielectric material. electrolysis. The gaseous electrolysis products formed on the surface of the electrodes 3 are dissolved in the working fluid, jf & under pressure. The working fluid saturated with dissolved gas moves from the longitudinal channel 2 through an annular conical channel into an annular gap, which has the form of an annular Venturi tube. In the constricted part 8 of the annular gap, the pressure decreases and the evolution of dissolved gases begins. When the working fluid moves in the cylindrical part 9 of the annular gap, by reducing the pressure below the pressure of the saturated aar gases dissolved in, a large number of the smallest cavitation bubbles are formed.

In the expanding part 10, the pressure rises and the cavities of these cavities collapse on the inner surface of the pipeline 7 being processed, which B1H leads to clearing the surface from radium sediments. The elastic seal 11 provides a tight fit of the cavitation exciter and the cleaned surface of the pipeline 7.

An additional elastic seal 11 is provided by the pressure of the fluid supplied through the openings 12 and channel 13. The movement of the device inside the pipeline was carried out by cables attached to the cavitator.

 When using a variant of the device (Fig. 2), cleaning is as follows.

In the longitudinal channel 2, an abrasive or chemically active suspension is supplied under pressure. When the abrasive slurry moves along channel 2, the electrolysis process takes place. Formed on the surface of the electrodes 3. The gaseous electrolysis products are dissolved in an abrasive or chemically active suspension under elevated pressure. The dissolved gas-saturated abrasive slurry moves from the longitudinal channel 2 through the annular conical channel 6 into the annular gap, having the form of an annular Venturi tube. In the constricted portion 8 of the annular gap, the pressure decreases and the evolution of dissolved gases begins. When the suspension moves in the cylindrical part 9 of the annular gap, by reducing the pressure below the saturated vapor pressure of the gases dissolved in the liquid, a large number of the smallest cavitation bubbles are formed.

In the expanding part 10 of the annular gap, the pressure rises and the cavitation bubbles collapse on the surface being cleaned.

The device is moved in the pipeline due to the reactive force of the jet of abrasive liquid coming out of the annular gap, or with the help of cables fixed to the cavitator and reflector.

The application of the proposed device allows to obtain a high degree of cleaning of the cavity of pipes and to reduce the time of cleaning.

Claims (1)

1. USSR author's certificate 453205, cl. On 08 On 9/04, 1972. fl