DD160906A1 - DOUBLE TUBE RING JET PUMP WITH CENTRAL ROOM - Google Patents

Abstract

The invention relates to a double-tube annular jet pump with central Foerderraum, which is particularly suitable for clear pumping of filter wells and for applying the air lifting method Saugspuelbohrgeraeten in the production of filter well bores in lignite mines. The object of the invention is to provide a device which is able to promote heavily polluted mine water easily with high flow rate and in large Foerderhoehe. The object of the invention is achieved in that a plurality of annular ducts are installed at defined intervals in a central tube strand. These ring dies consist of a convex and a concave nozzle ring as well as an intermediate piece with connecting holes and guide webs. Due to the design of the Duesenringe in detail and the device as a whole a maximum possible efficiency is achieved, since in addition, the static pressure of the fluid column located in the borehole is Foerderbeguenstigend effect. The device according to the invention can be operated both with compressed air and with water (as a delivery medium) and achieves large delivery heights at low delivery pressures.

Description

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Double-tube annular jet pump with central delivery chamber Application area

The invention relates to a device "which is particularly suitable for clearing filter wells and for applying the air lifting method to Saugspül drilling equipment in the production of filter well bores in lignite mines. Further application possibilities arise in the melioration construction, fishing and for the transport of mixed water mixtures in pipelines and canals.

Characteristic of the known technical solutions

There are propulsion devices for accelerating a flowing medium are known, which are lived out so that a sleeve-like shell piece around a main body (tube) and in this is arranged a conical primary and a conical secondary jet nozzle for a pressurized medium _e Babei is the cone -Helangwinkel of the jet nozzles between 15 ° and 45 ° · The media used are liquids, gases and liquid-gas mixtures.

Furthermore, pneumatic conveying devices with an annular air feed nozzle are known, which are located immediately behind a jacket-like jacket piece (also known as a sleeve).

shares in pressure chamber and nozzle chamber) have water inlet openings. '".

Object of the invention *

The object of the invention is "to provide a device with high efficiency, which is heavily contaminated (enriched with sand or gravel) mine water - as they occur in the production of filter wells with Saugspülbohranlagen - easily conveyed.

The device should be characterized by low wear, high reliability and easy adjustability of .Strömungsgeschwindigkeit the abzufordernden water,

For the flow velocity, the smallest possible values should be achievable in order to prevent the wellbore wall from boil-out (especially in transition zones from loose rock to hard rock).

For clear pumping of finished or regeneration-worthy filter wells, however, the highest possible flow velocity should be achievable.

The efficiency should be better than in comparable known devices (mammoth pump, jet pump) and correspond to the centrifugal pumps.

Explanation of the essence of the invention

The object of the invention is achieved by several, at defined intervals in a central tube strand built annular nozzles · These annular nozzles consist of a respective convex and a concave nozzle ring and an intermediate piece with connecting holes and guide webs ·

Through the intermediary of the distance between ä ^ en nozzle rings is accurately determined as well as a cylindrical annular space formed in which the air flowing in through the Eerbindungsbohrungen compressed air is distributed to the entire pipe circumference ·

The guide webs provide a concentric position between the central pipe and the casing pipe over the entire length.

Central tube and jacket tube are connected in a pressure-tight manner at the lower end by a bottom piece. "At the upper end, the device is terminated by a header with a pipe connection for the pumped medium.

Due to the nature of the arrangement of the convex and concave nozzle rings and the ground-side and head-pressure-tight connection between the central tube and jacket tube above each annular nozzle in the central tube creates a suction, while at the same time by the fluid to the liquid in the annular space between the central tube and casing pressure is exerted, thereby the liquid from the next lower ring nozzle - to the delivery chamber enclosed by the central tube -. flows out and is thereby deflected by the nozzle rings optimally in the conveying direction ·

The formation of the nozzle rings in detail as well as the device as a whole achieves a maximum possible efficiency, since in addition the static pressure of the liquid column located in the borehole is promoted favorably,

The device according to the invention can be operated both with compressed air and with water (as conveying medium) and achieves high delivery heights at low delivery pressures.

- 4 embodiment

A preferred embodiment of the subject invention will be described below with reference to the drawings.

Show Ea:

Figure 1ϊ the detailed representation of a preferred embodiment of the subject invention in section.

Figure 2: the schematic representation of a preferred embodiment of the entire device.

The illustrated in the drawings double-tube annular jet pump with central delivery chamber consists of one (or more) central tube (s) 1, one (or more) jacket tube (s) 7s a head 10 with tube for pumped medium 14 »a bottom piece 11 and at least two annular nozzles , which each consist of a convex nozzle ring 2, a concave nozzle ring 6, an intermediate piece 3 with connecting holes 4 and 5 webs. Through the webs 5 through the medium can flow to the respective lower ring nozzle, while it passes through the connecting holes 4 to the annular gap 8, there is distributed over the entire circumference · and - by the convex nozzle ring 2 and the concave nozzle ring 6 - optimally aligned - in the bounded by the central tube 1 delivery chamber occurs.

At the moment of conveying calm is the water level in the borehole or fountain 15, the water level in the space between the central tube 1 and jacket tube 7 and the water level within the central tube 1 at the same level.

If compressed air is supplied to the device through the pipe for conveying media 14, then the liquid which is located within the space between the central pipe 1 and the jacket pipe becomes

7, displaced into the space inside the central tube 1 and rises in it. The liquid level between the central tube 1 and the jacket tube 7 first sinks to the level 16 and initiates the start of delivery. On the liquid column between the central tube 1 and jacket tube 7 now continues to act a pressure * which presses the liquid from the next lower ring nozzle 2, 3, 4. »5» 6 »8 in the delivery chamber within the central tube 1, while above the higher ring nozzle 2, 3 »4» 5 $ 6, 8 Air mixed with air rises up "Within the central pipe 1, a suction arises at the same time between upper and lower ring nozzle 2 _f 3» 4 ₉ ; 5j 6, 8, which together with the static pressure ν the liquid column in the space between jacket tube 7 and borehole wall 12 promotes effective. Optimal pumping rates can be easily achieved with minimal air consumption and given air pressure by changing the number and diameter of the connecting holes 4 different size of the annular gap 8 or changes in the radius of the nozzle rings 2 ₉ 6. The device can be operated in the same design with water as the pumped medium,

Claims (6)

• f »({C t C · - 6 invention claim 1. Double-tube annular jet pump with central delivery chamber Characterized in that at least two of a convex nozzle ring (2), a concave nozzle ring (6) and an intermediate piece (3) with connecting holes (4) and guide webs (5) existing annular nozzles in a central tube (1) are installed and the central tube (1) both bottom and head side pressure-tight with a jacket tube (7) is connected · 2, double-tube annular jet pump according to point 1, characterized in that the envelope (rw-) of the convex nozzle ring (2) and the envelope (rwg) of the concave nozzle ring (6) diverge · 3 double-tube annular jet pump according to item 1 and 2, characterized in that the envelope (rw.) Of the convex nozzle ring (2), the inner diameter of the central tube (1) tangent, while the envelope (rwp) an imaginary line at a distance of 0.05 ·. 0.49 · d _{1 is} tangent to the median line, 4 * Double-tube ringblowing pump according to items 1 to 3, characterized in that the intermediate piece (3) guarantees a concentric position of all parts. 5 · Double-tube annular jet pump according to items 1 to 4, characterized in that both compressed air and water can be used as conveying medium. 6, double-tube annular jet pump according to item 1 to 5, characterized in that the bottom piece (11) and the head piece (10) can be designed so that the bottom side, a drilling tool can be added and the head side of the connection to the rotary drive of a Saugspül drill are made may ·