SU905397A1

SU905397A1 - Device for pipelines

Info

Publication number: SU905397A1
Application number: SU802861875A
Authority: SU
Inventors: Михаил Исакович Болотин
Original assignee: Белорусский Конструкторско-Технологический Институт Городского Хозяйства
Priority date: 1980-01-03
Filing date: 1980-01-03
Publication date: 1982-02-15

Description

(54) УСТРОЙСТВО ДЛЯ ОЧИСТКИ ТРУБОПРОВОДОВ(54) DEVICE FOR CLEANING PIPELINES

1one

Изобретение относитс к очистке трубопроводов от отложений и может быть использовано в мелиорации, нефтехимической промышленности, при эксплуатации водоцроводной и канализационной сетей и других отраслей народного хоз йства.The invention relates to the cleaning of pipelines from sediments and can be used in land reclamation, the petrochemical industry, in the operation of water-casing and sewage networks and other branches of the national economy.

Известно устройство дл очистки дренажных и т. п. труб, включающее реактивную насадку, смонтированную на гибком шланге, выполненном из соосно расположенных оболочек , кольцева полость между которыми заглушена вблизи реактивной насадки торцевой манжетой с выпускным отверстием, барабан, смонтированный на полом валу, разделенном перемычкой на полости, одна из которых соединена с трубопроводом дл подачи воды, друга - с трубопроводом дл подачи воздуха, причем у барабана установлен прижимной ролик 1.A device for cleaning drainage pipes, etc., is known. It includes a jet nozzle mounted on a flexible hose made of coaxially arranged shells, an annular cavity between which is plugged near the jet nozzle with an end cuff with an outlet, a drum mounted on a hollow shaft divided by a bridge on the cavity, one of which is connected to the pipeline for supplying water, the other - to the pipeline for supplying air, and the pressure roller 1 is installed at the drum.

Недостатком известного устройства вл етс то, что подача воздуха в поток происходит в непосредственной близости от реактивной наладки и происходит отложение наносов на дне трубопровода.A disadvantage of the known device is that the air is supplied to the stream in the immediate vicinity of the reactive adjustment and sedimentation occurs at the bottom of the pipeline.

Наиболее близким к предлагаемому изобретению вл етс устройство дл очистки трубопроводов, содержащее реактивнуюClosest to the proposed invention is a device for cleaning pipelines containing reactive

насадку, присоединенную к гибкому шлангу, выполненному из соосно расположенных оболочек, кольцева полость между которыми соединена с источником подачи воздуха 2.a nozzle attached to a flexible hose made of coaxially arranged shells, an annular cavity between which is connected to an air supply source 2.

Цель изобретени - повыш,ение эффективности и качества очистки.The purpose of the invention is to improve the efficiency and quality of cleaning.

Поставленна цель достигаетс тем, что в устройстве дл очистки трубопроводов, содержашем реактивную насадку, присоединенную к гибкому шлангу, выполненному The goal is achieved by the fact that in a pipe cleaning device containing a jet nozzle connected to a flexible hose made

10 из соосно расположенных оболочек, кольцева полость между которыми соединена с источником подачи воздуха, в нижней части наружной оболочки шланга по всей его длине выполнены дополнительные отверсти , расположенные с увеличивающимс 10 of coaxially arranged shells, the annular cavity between which is connected to an air supply source, in the lower part of the outer sheath of the hose along its entire length additional holes are made, which are located with increasing

15 по направлению к насадке шагом.15 towards the nozzle in steps.

На фиг. 1 изображено предлагаемое устройство; на фиг. 2 - разрез А-А на фиг. 1.FIG. 1 shows the proposed device; in fig. 2 shows section A-A in FIG. one.

Устройство включает гибкий шланг, выполненный из соосно расположенных двух The device includes a flexible hose made of coaxially arranged two

Claims

20 shells: inner 1 for supplying fluid (water) and outer 2. Compressed gas (air) is supplied through the annular cavity between the shells, the end of the hose is connected to the jet nozzle 3. In the lower part of the outer shell there are outlet openings 4 arranged in variable pitch from each other, which increases towards the jet packing 3. A valve 5 is mounted in the outlet openings for spraying gas. A hose is introduced into the pipeline 6 to be cleaned. The device operates as follows. The hose is introduced into the pipeline and its pipeline 6, then working fluid is supplied to the inner shell 1 under pressure sufficient to destroy sediments and create the necessary thrust force in the jet packing 3, and compressed gas is fed into the annular cavity between shells 1 and 2. The form comes from the nozzles to the lower part of the pipeline, where the diffuse sediments are transported by the flow of the working fluid to the nozzle jets 3. The cleaning process due to the supply of gas throughout the transportation path ITS more effective, since now for the same energy consumption increases significantly transporting sposobnost..potoka by providing the required gas content all the way Fat transporting, which is necessary to obtain the conveying speeds at which there is no falling out again deposits on the bottom of the pipe. The transport capacity of a stream is determined by the structure of the gas-liquid mixture, the flow regime, the density of the mixture, etc., but the stability of gas bubbles in the liquid is a determining factor. In foaming liquids, gas bubbles weaker aggregate into larger ones and break down more slowly and float up, the density distribution of the gas-soil mixture drastically changes and the swelling of sediment particles increases due to the penetration of liquid droplets and gas into the smallest cracks and pores of deposits. along the entire transport path of the sediment, and in the direction towards the outlet part of the pipeline its consumption increases due to a decrease in the pitch between the outlet openings, and this is just This is due to the fact that there the pressure losses and the amount of sediments are maximum and the greatest probability of sediment falling back to the bottom of the pipeline. An increase in gas content in the direction of transportation corresponds to head losses due to losses along the length and an increase in the flow density in the same direction, i.e. the number of particles per unit volume of the flow increases as it moves along the pipeline, which is explained by a decrease along the length of the stream into the flow of sediments additionally destroyed by the flow itself from the pipeline walls. The additional amount of gas added to the stream, as compared with the previous section, compensates for the decrease in its transport capacity by increasing the energy of the stream and increasing its speed due to the expansion of an additional amount of the gas component. The reduction of the location of the outlet ports is based on the ratio of the diameter of the hose and the pipeline, its degree of contamination and length, as well as the pressure and flow rate of the working fluid and compressed gas. The supply of gas along the entire transport route in the form of spray jets reduces the possibility of combining small sediment particles, and as is well known, the transport capacity of the stream decreases with increasing size of the transporting particles; additionally, the quality of cleaning also increases, since now, in addition to transporting, the flow in the gap between the hose and the pipeline also acquires enhanced cleaning ability. This is due to the fact that the gas jets, passing through the flow along its entire length, are transferred in the transverse direction of the flow of energy pulses, and the oscillatory movement of small bubbles near the solid surface (pipeline wall) leads to an increase in shear stresses in the unwashed deposits and their destruction. The arrangement of the outlet openings in the lower part of the outer shell allows the use of shells of any parameters, since gas jets flowing out of the openings create an additional reactive force, which tends to lift the hose. This allows changing gas parameters (flow, pressure), adjusting the position of the hose in the pipeline being cleaned, which is very important when passing through local restrictions, rises, ledges, etc. Using the proposed device will increase by 1.5-1.7 times the efficiency and cleaning quality. Claims device for cleaning pipelines containing a jet nozzle attached to a flexible hose, made of coaxially arranged shells, the annular cavity between which is connected to an air supply source, characterized in that, in order to increase the efficiency and quality of cleaning, in the lower part The outer shell of the hose along its entire length is made up of additional openings arranged with a step that is increased towards the nozzle. Sources of information taken into account during the examination 1. USSR author's certificate jVo 32Г603, cl. E 03 F 9/00, 1970.

2. USSR author's certificate number 170420, cl. E 03 F 9/00, 1964.