SU1741939A1 - Device for cleaning inner surface of pipeline - Google Patents

Abstract

Use: cleaning the internal cavity of the existing pipeline. SUMMARY OF THE INVENTION The device has a body with petal knives and a cuff pivotally mounted around it circumferentially. The hinge fastening of the knives is made in the form of elastic elements installed on both sides of the knives in their plane. One end of the latter is fixed on the knives, and the other on the case. The front elastic element has a spring of return of the sleeper to its original position 5 Il.

Description

The invention relates to devices for cleaning the internal surface of a pipeline from deposits.

A device for cleaning the internal surface of pipelines includes cleaning cuffs, cleaning tools in the form of brushes with brush holders and a spring-loaded cup inside the hollow shaft interacting with the brush holders and pressure heads consisting of two pairs of conical plates, each of which has a channel for accommodating the support part of the brush holder, with one of the conical plates of each pair having a groove for moving the support part of the brush holder therein.

The disadvantage of this device is the rapid wear and tear of knives and unreliability in operation.

A device for cleaning the internal surface of pipelines is known, comprising a housing with a sleeve portion fixed on it and a working member made in the form of plates with knives mounted perpendicular to the axis of the pipeline, a system for supplying the working agent to the pipeline. On the working surfaces of the plates stiffeners with stops to interact with the outer surface of the body are installed

However, the device is characterized by insufficient rigidity of the knife for cutting deposits, since the bend arm is very fast in wearing the lower part of the device due to the gravity of the device itself, which will lead to inefficient cleaning in the upper part of the pipeline due to the formation of a gap between the pipes and knives.

The disadvantage is the presence of stiffeners for securing the front part of the knives, which, if there are ransoms in the pipeline, will lead to jamming in the pipeline and device breakage, which can lead to an emergency situation.

The purpose of the invention is to increase the reliability of the device, increasing the life

cl

with

 H

four

u so yu

services of the cleaning unit and the product as a whole.

The goal is achieved by the fact that in the device the hinged fastening of knives for cleaning the inner surface of the pipeline is made in the form of elastic elements installed on both sides of the knives in their plane, one end of which is fixed to the knives and the other on the case. the elastic element has a spring return scrapers to its original position.

In contrast to the known in the proposed device knives-petals have a concave surface, are overlapped and pivotally fixed by elastic elements mounted on both sides of the knives.

Figure 1 shows the device, a general view; FIG. 2 shows a knife-petal in three projections; fig. 3 - the same, when the blade of the petal is deflected under the influence of an obstacle; Fig. 4 is a diagram of the arrangement of the blades at an angle a; Fig. 5 is a side view of the mutual arrangement of the knives-petals.

The device for cleaning the internal surface of the pipeline is made of a hollow shaft 1, a cutting unit attached to it, consisting of knives-petals 2, an elastic element 3 consisting of two sheets located on both sides of the knife-petal, one end of which is fixed to knives, and the other on the housing 4, springs 5 and 6, ti 7. At the forward movement of the device, the elastic element is pressed against the leaf spring 5 to return the petal knives to their original position. Knives-petals are mounted through the elastic elements to the body with bolts 8 and have a concave surface, are overlapped at an angle to the axis of the body, and the angle of inclination can be from an obtuse angle to straight with respect to the front part as the device moves. On the hollow shaft, there are also three supporting roller assemblies at an angle to the axis of the pipeline, consisting of roller 9, pillar 10, base 11, strips 12, limiter 13, fixing the support rollers in a position that prevents the device from dropping into the process taps.

The support rollers have springs 14 and axles 15-17. An additional knife 18, a cuff 19 and a pipe 20 to be cleaned are mounted on the hollow shaft. The arrow indicates the direction of current movement.

The device works as follows.

Through special gateway devices, the device is introduced into the cleaned

conduit 20. In the conduit, the device is held on rollers 9 and the cuff 19. If there is sufficient pressure drop before and after the cuff, the device begins to move along the pipeline. Knives-petals 2 are installed around the perimeter of the base 4 (rings) with an overlap inclined to the axis of the pipeline and are cut off from the walls of the deposit, and this mass is carried away by the flow of fluid flowing through the windows of the knife-petal and the gap

between them. With the passage of protrusions, irregularities, welds in the pipeline, the blades-lobes fold back together or separately under the influence of friction force on the flexible elements 3, and after the irregularities pass, they again take up their original position due to the influence of springs 5 and 6 of the flexible element 3 and restrictive flexible ti gi 7, and the plate spring 5 acts on

knives-petals through the flexible element 3 and thereby contributes to the flexible, plastic bending of the knives-petals during operation. With the passage of technological narrowing, transitions in the pipeline all knives, petals

due to the frictional force on the flexible hinges, they are bent back, and an additional knife 18 and cuff 19 are cleaned at this section of the pipeline. As the knife-lobes 2 wear out, they are installed without a gap with

using a flexible cable. 7. The use of the proposed device improves reliability in operation, improves the quality of cleaning the pipeline, and increases the service life of the cleaning unit and the product in

generally gives a significant economic effect.

Claims (1)

Apparatus of the Invention A device for cleaning the inner surface of a pipeline, comprising a body, petal blades pivotally mounted around the body circumference, and a cuff mounted on the body, characterized in that. in order to increase SAFETY in operation, the hinge fastening of the zeros is made in the form of elastic elements installed on both sides of the knives in their plane, one end of which is fixed on the knives and the other on the case, moreover, in the course of the movement of the device, the elastic element has springs for returning the scrapers to the desired position. 9 S 2 3 74 H6Y 915/3 / O &   //// ///// / G- & z ssJ b l & Jfrb aysja / yzgczafee l-ji -four/ v / j / I "I -J -H d co Uh Aa & V9.2 3 five -but--" (/ tSfCf / W V j FIG 4 PuS.J FIG. five