SU937789A1

SU937789A1 - Air lift

Info

Publication number: SU937789A1
Application number: SU802999239A
Authority: SU
Inventors: Валерий Георгиевич Миргородский; Владимир Семенович Пащенко; Владимир Георгиевич Миргородский; Александр Александрович Мозговой
Original assignee: Донецкий Ордена Трудового Красного Знамени Политехнический Институт
Priority date: 1980-10-20
Filing date: 1980-10-20
Publication date: 1982-06-23

Description

(5) ЭРЛИФТ(5) ERLIFT

1one

Изобретение относитс к области насосостроени , в частности к конструкции эрлифта, и может быть использовано при проектировании гидротранспортных систем в промышленности, строительстве и сельском хоз йстве.The invention relates to the field of pump construction, in particular to the construction of airlift, and can be used in the design of hydrotransport systems in industry, construction and agriculture.

Известен эрлифт, содержащий подъемную трубу со смесителем и всасывающим патрубком, а также воздухоподвод 1 .Known airlift containing a lifting pipe with a mixer and a suction pipe, as well as air supply 1.

Недостатком известного эрлифта вл етс узкий диапазон работы.A disadvantage of the known airlift is the narrow range of operation.

Наиболее близким к изобретению вл етс эрлифт, содержащий подъемную трубу, подсоединенный к ней входным отверстием воздухопровод и всасывающее устройство, выполненное в виде кожуха, размещенного концентрично подъемной трубе и расположенного по оси кожуха всасывающего патрубка t2;3.Closest to the invention is an airlift comprising a lifting pipe, an air line connected to it, and a suction device made in the form of a casing placed concentrically with the lifting pipe and located along the axis of the casing of the suction nozzle t2; 3.

Недостатком данного эрлифта вл етс узкий диапазон работы, что св зано с малой эффективностью при ра- боте на т желых грунтах.The disadvantage of this airlift is the narrow range of operation, which is associated with low efficiency when working on heavy soils.

Цель изобретени - расширение диапазона работы.The purpose of the invention is to expand the range of work.

Поставленна цель достигаетс тем, что труба в нижней части снабжена расшир ющимс книзу конусным насадком , образующим с кожухом кольцевой зазор, а верхний торец всасывающего патрубка размещен над зоной The goal is achieved by the fact that the pipe in the lower part is provided with a tapered nozzle that expands downwards, forming an annular gap with the casing, and the upper end of the suction nozzle is located above the zone

10 подсоединени к трубе воздухопровода и расположен от верхней кромки входного отверсти на рассто нии, не меньшем, чем диаметр патрубка.10 is connected to the air duct pipe and is located at the distance from the upper edge of the inlet not less than the diameter of the nozzle.

На чертеже схематически показан The drawing shows schematically

15 эрлифт, продольный разрез.15 airlift, longitudinal section.

Claims

Airlift contains a lifting pipe 1, an air pipe 3 connected to it by an inlet 2, and a suction device 20 made in the form of a casing k placed concentrically with a lifting pipe 1 and an inlet pipe 5 located along the axis of the casing i, and the lifting pipe 1 in the lower part is equipped with an expanding downward conical nozzle 6, forming with the casing 4 an annular gap 7, and the upper end 8 of the suction nozzle 5 is located above the zone of connection to the pipe 1 of the air duct 3 and is located from the upper edge of the inlet 2 and z, not less than the diameter D of the nozzle 5. Erlift installation works as follows. . Compressed air through the air duct 3 is supplied in the annular gap 7, formed by the suction nozzle 5 and the cone nozzle 6 of the riser tube T, the air moves in the gap 7 up to the upper end 8 of the suction nozzle 5 located above the upper edge of the inlet of the duct 3 at a distance of ZI, not less than the diameter D of the suction inlet 5, where it interacts with the pulp. The suction device, made in the casing provides the pulp to the suction pipe 5 with a certain consistency. With an uneven supply of solid material, a layer of solid material is formed around the casing, and the hydraulic resistance to the passage of the pulp to the suction inlet 5 increases. Water begins to flow through the casing k and the annular gap 7 formed by the cone nozzle 6 and casing k, due to the fact that water from the annular gap 7 moves to the suction inlet 5 through the resulting layer of solid material, directly in contact with it, its intensive erosion occurs. As a result, the reliability of the installation is significantly increased. The location of the upper end B of the suction nozzle 5 above the upper edge of the air inlet 2 of the air duct at a distance Z not less than its diameter D ensures that the air velocity in the axis 4 is equal in the cross section of the riser 1 and the energy loss during air mixing with the pulp is reduced. The absence of a blender reduces the size of the lower part of the airlift, which makes it possible to reduce the diameter of the sump. In addition, with the elimination of the mixer, the loss of air pressure decreases as the mixer enters, the air expands, and in the described airlift at the entrance to the annular gap between the lifting pipe 1 and the suction nozzle 5 it narrows, which increases the efficiency of the airlift due to more complete use compressed air energy. The proposed design significantly expands the range of airlift operation. The formula of the invention of Airlift. containing a lifting pipe, an air duct connected to it, an air duct and a suction device made in the form of a casing placed concentrically with a lifting pipe and located along the casing axis of the suction nozzle, characterized in that in order to expand the operating range, the lifting pipe in the lower part is equipped with an expanding downward conical nozzle, forming with the casing annular gap, and the upper end of the suction nozzle is located above the zone of connection to the duct pipe and is located from the upper edge in od-leg openings at a distance not less than the nozzle diameter. Sources of information taken into account in the examination 1. USSR author's certificate number 186290, cl. F Qi F 1/00, 1965.

2. USSR author's certificate according to the application ff 2757 65 / 25-06,, cl. P Oi 1/20, 1979.