SU1586801A1 - Arrangement for cleaning internal surface of pipe-line - Google Patents

Abstract

The invention relates to the cleaning of pipes from the inside, can be used in melioration and water management and is aimed at improving the quality of cleaning. On the hub 2 of the housing 1, several rows of spring lobes 3,4 and 5 and sealing plates 6 are installed in a checkerboard pattern. The ends of the lobes 3 and 4 are bent and arranged vertically relative to the wall of the pipeline being cleaned. The petals 5 constitute the fairing, which forms a channel in the form of an annular Venturi tube with the pipeline wall. The device is moved along the pipe by the flow of the working agent. In the annular channel, the flow is accelerated. When the flow interacts with the folded ends of the petals, active cavitation zones are formed, contributing to an increase in the quality of cleaning. 2 Il.

Description

2 g 3 4 7 8d 5

1

The invention relates to the cleaning of pipelines from the inside and can be used in land reclamation and water management.

The purpose of the invention is to improve the quality of cleaning.

Figure 1 shows schematically the device, a longitudinal section; 2 is a view A of FIG. 1.

A device for cleaning the inner surface of the pipeline has a housing 1 with a hub 2. At the hub, at an angle to the axis of the housing, spring petals 3 are placed in at least three rows in staggered order. The distance between the petals around the circle in each row is not more than the width of the petal. Elastic sealing plates 6 are adjacent to the last row of petals 5. Petals A are longer than petals 3, and petals 5 are longer than petals 4.

The free ends of the petals 3 and 4 are bent at an angle, providing a vertical arrangement of the bent part relative to the wall of the pipeline. Thus, the curved sections of the petals of each row form ca 7 and 8, separated from one another by a certain distance due to differences in the length of the petals.

Each lobe 5 rows, interacting with the elastic plates 6 seals, is bent along the profile of the Venturi tube. and they all together form a convex fairing. The device has an adjustable brake-centralizer 9.

A device for cleaning the inner surface is introduced into the pipeline and is moved along the inside of it by the flow of the working agent transported through the pipeline. Before the device is introduced into the pipeline, regulation of the brake centralizer provides a certain amount of resistance to movement of the device in the pipeline, due to which there is a pressure drop in the pipeline cavity in front of and behind the device, and the working agent, the device overtaking, flows through the channels formed between the petals.

A convex fairing of petals 5 forms with the pipeline surface an annular channel in the form of an annular Venturi tube. The flow, the passage through this channel, accelerates and in a narrow part of it interacts with the bent ends of the petals 3 and

4, the height of which determines the channel width at this location and is selected from the condition of obtaining a speed sufficient for the occurrence of a vortex cavitational zone.

when flowing a flow of bent ends of the petals. The distance between the 7 and 8 bent ends of the petals themselves should not be less than the length of the active cavitation zone behind the bent end of the petal.

Thus, when the device is operated, CA 7 and 8 from the bent ends of the petals are the generators of the cavitation process. Vapor-gas bubbles are carried out further by water and collapse in front.

It provides a high-quality surface cleaning. During the experimental cleaning, the pipeline was cleaned to the metal, all the shells and irregularities were cleaned at the speed of movement of the device 2,

5 ... 4 km / h.

The proposed device provides a degree of cleaning sufficient to apply a protective coating, without the need for additional

flushing the pipeline with water. The use of the invention improves the quality of cleaning the internal surface of the pipeline,

Claims (1)

Invention Formula A device for cleaning the internal surface of the pipeline, which contains two rows in a staggered spring petals, the distance between which around the circumference is no more than the width of the petal, and elastic packing plates located close behind them, In order to improve the quality of cleaning, the device is additionally equipped with at least one more row of spring petals, and the petals of each subsequent row towards the sealing plates are longer than l the petals of the previous row, while the free ends of all the petals, except for the petals of the row, interacting with the sealing plates, are bent at an angle, providing a vertical arrangement of the curved part relative to the pipeline wall, and each of the petals of the row interacting with the sealing plates is bent along the profile venturi tubes and placed bulge outward. Type A FIG. 2