RU2451216C1 - Method of water air lift from wells and open basin - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: proposed method comprises water flow aeration by injecting atmospheric air by said flow. Flow is driven by surplus pressure developed by air lift weight, ballast and/or axial force. For this, limited volume of water is isolated to develop surplus pressure on free surface of said isolated volume. Proposed device comprises air lift casing with hydraulic seals, water discharge branch pipe, mixing chamber, atmospheric air inlet into mixing chamber and section of lift tube. Besides, device comprises limiting case with suction valve at its inlet and lifting device, for example, capstan. Lift tube and air lift casing is suspended on lifting device cable.

EFFECT: lifting water from open basis.

4 cl, 1 dwg

Description

The invention relates to pump engineering, in particular to methods of lifting water by airlift, and can be used in the design of hydrotransport and energy systems in industry and construction, survey work, in agriculture, as well as in water supply.

A known method of lifting water by airlift by ejecting air with a stream flowing from a reservoir through a pipe into a mixer (SU 1043365 A, 09/23/1983). The disadvantage of this method is the need to immerse the mixer under the liquid level. With a shallow water depth, the start of an airlift becomes impossible.

Closest to the invention in technical essence is a method of lifting water by airlift by creating excess pressure on the surface of the liquid by weight of the airlift, ballast and axial force (RU Application for the invention 2009124335, 12/27/2010). The disadvantage of this method is the impossibility of its use in open reservoirs and large tanks, such as wells, due to the fact that when creating excessive pressure on the free surface of the liquid, the latter flows out from under the airlift body into the reservoir.

The objective of the invention is the provision of the possibility of water withdrawal by airlift from open reservoirs and wells.

The technical result is achieved by the fact that a limited volume of water is preliminarily allocated in the body of the reservoir, and at the time of creating excessive pressure on the free surface of the liquid, the possibility of an isolated volume of water entering the reservoir through the intake channel is excluded. This allows you to take water airlift from wells and open reservoirs.

An example of the method

The water is raised as follows. A pipe with a suction valve in its lower part is lowered into the well and its position is rigidly fixed at the bottom of the well. Then, airlift with a lifting pipe is lowered into this pipe and suspended from a gate on a cable. Bring the airlift in contact with the surface of the water. If it is necessary to raise water, the weight of the airlift, ballast and, if necessary, the axial force is transferred to the surface of the water. In this case, the suction valve is closed and excessive pressure is created on the surface of the water. Under the influence of excess pressure, water flows through the nozzle into the mixing chamber, ejects air from the atmosphere, and under the influence of the pressure of the jet, an aerated stream of water rises to the day surface. In this way, airlift of water from wells and open reservoirs is ensured.

Device for lifting water

A device for lifting water airlift. It contains an airlift housing that provides a connection between the mixing chamber and the atmosphere. In the housing there is a mixing chamber and a nozzle for the outflow of water from the well into the mixing chamber and then after mixing with air into the lifting and up to the day surface (SU 1043365 A, 09/23/1983). The disadvantage of this device is the need to immerse the mixer below the water level in the well.

The closest in technical essence to the invention is the device (RU Application for the invention 2009124335, 12/27/2010), in which the airlift housing is made in diameter close to the diameter of the casing of the well containing water for lifting, and is equipped with hydraulic seals. In the airlift housing there are also a mixing chamber and a pipe for water to flow from the well into the mixing chamber and then after mixing with air into the riser pipe. When lowering, the airlift is installed on the free surface of the water. However, in the case of a well or an open reservoir, when excessive pressure is created on the free surface of the water, the latter flows out from under the end of the airlift body into the reservoir.

The objective of the invention is to provide the possibility of lifting water airlift from wells and open reservoirs.

The technical result is achieved by the fact that the airlift housing is placed in a pipe, in diameter close to the diameter of the airlift housing, isolating a limited volume of water from the reservoir and equipped with a suction valve at the lower end. And the end face of this pipe is equipped with pins for fixing the pipe in one position at the bottom of the reservoir. For reciprocating movements, the airlift is suspended on a cable from a lifting device, such as a gate, which is mounted on a frame, preferably fastened with a water-containing pipe. The ends of the gate have paired disks connected by rods for gripping them by hand when the gate rotates.

To perform hoisting operations with airlift, other lifting devices can be used.

A device for lifting water with airlift from wells is shown in the attached drawing.

The device comprises a pipe 1 with pins 14 at the end and a suction valve 15, airlift housing 2 with hydraulic seals 3. Inside the airlift housing 2 there is a mixing chamber 4, an air tube 5, a lifting pipe 6 and a pipe 7. The entrance to the chamber 4 is isolated by a fastener 8 from the internal space of the airlift body 2 and is connected by an air tube 5 to the atmosphere.

On the day surface, the device has a lift made in the form of a gate 9, equipped with paired disks 10, connected by rods 16 with the possibility of their capture by hands to rotate the gate 9. The gate 9 is mounted on a frame 11 attached to the pipe 1. The airlift is suspended on a cable 13 from the lift devices, e.g. gates 9.

The device operates as follows. A pipe 1 with pins 14 at the bottom end and a suction valve 15 at the bottom of the pipe inlet lowers into a well or reservoir. The pins 14 are pressed into the ground to fix the pipe 1. Then the airlift assembly with the lifting pipe is lowered into the pipe 1. The airlift lowers into the pipe 1 on the cable 13 of the gate 9. When the airlift housing 2 comes into contact with the free surface of the water in the pipe 1, the device is considered to be brought into working condition. In this case, the suction valve is closed.

To lift water from the well, the weight of the airlift and ballast is transferred to the surface of the water in the pipe. Overpressure forms on the surface of the water, under the influence of which water flows through the pipe 7 into the mixing chamber 4, entraining air from the atmosphere along the air tube 5. After mixing water and air, the air-water mixture under the pressure of the jet from the pipe 7 moves up the water-lifting pipe 6 and is discharged into the collection tank 12. Depending on the needs, from 100 to 1500 liters can be raised in one working cycle. In this case, the length of the airlift's working stroke is from 0.5 to 1.5 meters, rarely more with the corresponding diameter of the water-containing pipe.

When the gate 9 rotates, the airlift rises, the suction valve opens due to the pressure from the reservoir and the pipe 1 is filled with water from a well or reservoir. When the airlift reaches its upper extreme position, the cycle ends.

Claims (4)

1. A method of lifting water by airlift from wells and open reservoirs, including aeration of a rising stream of water due to ejection of air from the atmosphere by the same stream moving under the action of excess pressure created by the weight of the airlift, ballast and / or axial force, characterized in that in the mass a limited volume of water is isolated from a reservoir, it is isolated from the reservoir and excessive pressure is created on the free surface of this isolated volume. 2. A device for lifting water by airlift according to claim 1, comprising airlift housing with hydraulic sealing means and a nozzle for water outflows, a mixing chamber, an entrance to the mixing chamber from the atmosphere, a part of the lifting pipe, located in it, characterized in that it is equipped with a restrictive housing with a suction valve at the inlet located in the reservoir, a lifting device, for example a collar, on the cable of which a lifting pipe with an airlift housing is suspended. 3. The device according to claim 2, characterized in that the gate is mounted on a frame fastened with a restrictive body, and the ends of the gate are equipped with double discs that are several times larger than the gate in diameter and interconnected by rods with the ability to be gripped by their hands to rotate the gate. 4. The device according to claim 2, characterized in that the restrictive housing at the lower end is equipped with pins with the possibility of pressing them into the ground to fix the restrictive housing in one position.