JPS5920479Y2 - Air blowing device in air lift - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air blowing device for an air lift.

Mining from the ocean floor or the bottom of a lake using an airlift is carried out by supplying compressed air from a ship to the middle part of an ore lifting pipe, and lifting ore vIJ materials (such as nodules) by the rising bubbles (air).

In this case, the compressed air is sent through an air pipe from a compressed air supply system installed on the ship, and therefore the onboard connection between the compressed air supply system and the air pipe has a structure that can absorb the movement of the ship. There is.

However, stress concentrates at the connection between the air pipe and the ore lifting pipe, which may lead to damage to the connection.

Therefore, the present invention proposes an air blowing device for an air lift that can prevent stress concentration at the connection between the air pipe and the ore lifting pipe and always perform good air blowing. The explanation will be based on.

In FIG. 1, reference numeral 1 denotes a three-phase separation tank, which is composed of a drum-shaped main body 2, a screen cylinder 3 disposed inside the main body 2, and the like.

That is, the screen cylinder 3 is formed into a conical cylinder shape with a cylindrical upper part and a conical lower part, and is formed into a screen by drilling a large number of holes 4 between the cylindrical part and the upper part of the conical cylinder part. It is.

A dehumidifier/(mist separator) 5 is provided in the upper part of the screen cylinder 3, and a rotary valve 6 is further provided in the lower part protruding from the main body 2.

A seawater or water reservoir 7 is formed between the conical cylinder portion and the main body 2, and a drain pipe 9 in which a liquid level control device 8 such as a valve is interposed is connected to this seawater or water reservoir 7.

A chute 1 serving as an outlet for the rotary valve 6
A dewatering/conveying device 11 is provided below the container 0.

That is, a curved screen 12 is provided below the chute 10, and a seawater or water storage tank 13 is provided further below.

A belt conveyor 14 is disposed laterally from the end of the curved screen 12.

Reference numeral 15 denotes an ore lifting pipe, the upper end of which communicates with a supply duct 17 via a flexible hose 16.

This supply duct 17 passes through the main body 2 and communicates with the upper part of the screen cylinder 3.

Here, the discharge direction of the supply duct 17 is
It is in the direction along the inner surface of the.

Reference numeral 18 denotes an exhaust pipe communicating with the upper end of the main body 2, and a muffler 19 is interposed in the middle thereof.

Reference numeral 20 denotes a compressed air supply device, and although the figure shows a type using three electric motors, it is also possible to adopt a type using one or two electric motors.

The air pipe 21 from the compressed air supply device 20 is connected to the middle of the ore lifting pipe 15 via the air blowing device 22 of the present invention.

The air blowing device 22 is connected to the ore lifting pipe 1 as shown in FIG.
5, a relay pipe 23 is interposed in the middle thereof so as to be relatively rotatable around an axis 24, and an air pipe 21 is connected to this relay pipe 23.

That is, the upper and lower ends of the relay pipe 23 are curved lid openings 25A, 25.
Sockets 26A and 2 are formed in the shape of B, and into which the curved cap openings 25A and 25B are inserted, with both ends of the ore lifting pipe 15 being large diameter parts.
It is formed in 6B.

These curved lid openings 25A, 25B and sockets 26A, 26
Seal members 27 A and 27 B are interposed between the relay pipe 23 and the pipe B, thereby allowing the relay pipe 23 to rotate around the axis 24 .

28A. Reference numeral 28B indicates a retaining ring that is attached with bolts and nuts 29A and 29B.

An inner cylinder 30 is integrated into the body of the relay pipe 23, thereby forming an annular air reservoir 31, and the inner cylinder 30 is further provided with a large number of air ejection holes 32.

Said air pipe 21 communicates with an air reservoir 31 and is provided with an air inlet valve 33, for example a piston-driven gate valve.

A pair of upper and lower rings 34A, 34B are attached to the ore lifting pipe 15 slightly above the connection part, and these rings 34A,
Connector 35 rotatable around axis 24 between 34B
is installed.

This connector 35 holds the air pipe 21, cable 36, and the like.

37 indicates measuring instruments. Compressed air from the compressed air supply device 20 is supplied to the air reservoir 31 through the air pipe 21,
The air is blown out from a large number of air blowing holes 32.

The resulting mixture of mineral matter, seawater or water, and air travels up the ore lifting pipe 15 and is discharged into the screen cylinder 3 via a flexible hose 16 and a supply duct 17.

At this time, since the liquid is discharged along the inner surface of the screen cylinder 3, a cyclone phenomenon occurs within the screen cylinder 3.

The air thus separated is dehumidified in the dehumidifier 5 and then flows to the exhaust pipe 18 side.

Also, most of the seawater or water flows into the seawater or water reservoir 7 through the holes 4 of the screen cylinder 3.

A portion of seawater or water-containing mineral substances is taken out by the rotary valve 6 while maintaining airtightness on the main body 2 side, and is delivered to the dewatering/conveying device 11 via the chute 10.

The mineral material is then dewatered again while traveling through the curved screen 12 and then conveyed off via the belt conveyor 14.

The separated and dehumidified air is discharged through the exhaust pipe 18, and at this time, the sound is muffled by a muffler 19 installed in consideration of the shipboard environment.

During such work, when a force such as twisting is applied to the air pipe 21 due to a tidal current, for example, the air pipe 21 rotates around the axis 24 together with the relay pipe 23 and the connector 35, thereby causing damage at the connection part. Stress concentration can be prevented.

As described above, according to the present invention, stress concentration at the connection between the air pipe and the ore lifting pipe can be prevented, and damage at this connection can be eliminated.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic front view;
FIG. 2 is a partially cutaway front view of the main part. 1...Three-phase separation tank, 3...Screen cylinder, 5...Dehumidifier, 6...Rotary valve, 11... Dehydration/conveyance equipment, 15.
...Ore lifting pipe, 20 ... Compressed air supply device, 21 ... Air pipe, 22 ... Air blowing device, 23 ... Relay pipe, 24... Axis core, 25A, 25B... Curved lid opening, 26A. 26 B...Socket, 27 A, 27 B...
... Seal member, 30 ... Inner cylinder, 31 ...
...Air reservoir, 32...Air outlet, 33...
...Air inlet valve.

Claims (1)

[Scope of utility model registration request] An air blowing device for an air lift, characterized in that a relay pipe is interposed in the middle of an ore lifting pipe so as to be relatively rotatable, and an air pipe from a compressed air supply device is connected to the relay pipe.