JPS6039047Y2 - Separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for separating aspirate from a suction air stream containing aspirate.

Various devices have been proposed for separating the aspirate from the suction airflow. Among them, a negative pressure chamber having a communication port with the suction device is provided with a suction flow inlet and an axis of the suction flow inlet. Some have an outlet located in an extended position.

According to this separation device, the suction airflow in the negative pressure chamber reduces its flow velocity and changes its flow direction to flow toward the communication port, while the suction material moves toward the discharge port due to inertia during inflow. This effectively separates the aspirate from the suction air stream.

By the way, in such a separation device, a part of the suction material flowing into the negative pressure chamber from the suction flow inlet does not directly enter the exhaust port, but is slightly deflected by the suction airflow and collides with the wall surface of the negative pressure chamber around the discharge port. There is a problem in that the wall surface is worn out and the life of the negative pressure chamber is shortened.

In view of this problem, the present invention aims to provide a separation device that eliminates wear on the wall surface of the negative pressure chamber around the discharge port and the peripheral surface of the discharge port.

The separation device of the present invention provides a suction flow inlet in a negative pressure chamber having a communication port with a suction device, and a funnel-shaped body having a discharge port in a negative pressure chamber portion at an axial extension position of the suction flow inlet. removably connected, the funnel-shaped body is configured to be pivotable around a support shaft provided parallel to the axis at a position spaced apart from the funnel-shaped body; A funnel-shaped protective cylinder is detachably provided to cover the tapered wall surface of the funnel-shaped body and the circumferential surface of the discharge port.

With such a structure, the suction material that does not directly enter the discharge port collides with the protective cylinder, thereby preventing direct collision with the wall surface of the negative pressure chamber and abrasion of the wall surface of the negative pressure chamber.

Further, when the protective cylinder becomes worn, it can be easily replaced by rotating the funnel-shaped body and separating it from the negative pressure chamber.

Preferably, the protective cylinder is made of a wear-resistant material.

An embodiment in which the present invention is applied to a scum separation device in a scum removal device for removing scum (slag) from the surface of molten metal will be described below with reference to the drawings.

FIG. 1 shows a scum removal device, in which 1 is a suction head, which is connected to a scum separation device 3 via a suction tube 2 that can be expanded, contracted and bent, and the scum separation device 3 is connected to a suction device (not shown). ing.

The suction head 1 is supported by a support device 4 having a pantograph mechanism 5 so as to be horizontally movable and movable up and down.

That is, the pantograph mechanism 5 has three free points located on a straight line.The suction head 1 is attached to the free point 6 at one end, the free point 8 at the other end is pivoted to the base 9, and the A free point 7 is horizontally movably supported on an elevating body 10, and by raising and lowering the elevating body 10 and horizontally moving the intermediate free point 7 on the elevating body 10, the suction head 1 moves within the range shown by the imaginary line. It is movable.

The suction pipe 2 also includes a pair of flexible joints 11a and 11b in which curved pipes are slidably fitted together, and a telescopic joint 11a and llb in which a straight pipe arranged between these flexible joints is slidably fitted. joint 12a,
12b, which connects the movable suction head 1 and the scum separation device 3.

Scum is thus removed by arbitrarily positioning the suction head 1 to suction the scum and separating it from the suction airflow by the scum separator 3.

As shown in FIGS. 2 and 3, the scum separation device 3 separates the scum from a negative pressure chamber 13 communicating with the suction pipe 2 and a discharge port 14 at the lower end of the negative pressure chamber 13 into a fluid. It is provided with a discharge section 31 for discharging.

The negative pressure chamber 13 has an upper cylindrical part 15a and a lower truncated conical part 1.
5b with a vertical axis; an upper lid 16 that closes the upper end of the cylinder 15; and a funnel-shaped body 17 connected to the lower end of the cylinder.

The funnel-shaped body 17 has a lower cylindrical portion 17b whose inner circumference forms the outlet 14, and an upper truncated conical portion 17a which has a tapered wall surface 18 whose cross-sectional area gradually decreases toward the outlet 14. It's configured.

Inside the funnel-shaped body 17, a funnel-shaped protective cylinder 20 made of a wear-resistant material such as cast metal or ceramic that covers the tapered wall surface 18 and the circumferential surface of the discharge port 14 is removably placed. There is.

An extending cylindrical body 19 is slidably and airtightly fitted onto the outer periphery of the lower cylindrical portion 17b of the funnel-shaped body 17, and the extending cylindrical body 19 is immersed below the liquid surface of the liquid tank 31. The negative pressure chamber 13 is sealed with liquid.

Further, the extending cylinder 19 is configured to be able to be divided into two parts at the center, into an upper cylinder 19a and a lower cylinder 19b, and a water injection device 35 constituting a part of the discharge part 30 is mounted on the outer periphery of the lower cylinder 19b. It fits and supports the extending cylinder 19.

Further, the funnel-shaped body 17 and the upper cylinder body 19a are connected to each other so that the vertical positional relationship can be adjusted and separated by flanges and bolts provided on each side (not shown).

A communication port 21 with a suction device is formed in the side wall of the cylindrical portion 15a of the cylinder 15, a suction inlet 22 is formed in the center of the upper lid 16, and the discharge port 14 is connected to the suction inlet 22. It is located at the extended position of the axis.

The suction inlet 22 is connected to the suction pipe 2 via a rotary joint 23, and communicates with an aspirate inflow pipe 24 that extends to approximately the center of the negative pressure chamber 13 and has an opening 24a.

An annular plate 25 is provided protruding from the outer periphery of the lower end of the aspirate inflow pipe 24, and a large number of outflow prevention members 26 are arranged in parallel in the circumferential direction from the lower surface of the annular plate 25 to reach the vicinity of the wall surface of the truncated conical portion 15b.

This outflow prevention member 26 is made of a pipe body and forms a columnar space with an open bottom end, and has an opening 26 along the longitudinal direction facing radially inward, that is, the upstream side in the flow direction of the suction airflow.
a, and a guide member 27 that guides the suction airflow to the opening 26a is disposed inside the outflow prevention member 26 in the radial direction.

A partition plate 28 made of an annular flat plate is attached to the upper inner periphery of the cylindrical portion 15a so as to be inclined such that the part near the communication port 21 is located downward and the part further away from the communication port 21 is located upward.

The inner periphery of the partition plate 28 is located at a distance from the outer periphery of the aspirate inflow pipe 24, and a partition cylinder 29 is provided that extends upward from the inner periphery to the vicinity of the upper lid 16.

An annular chamber 30 communicating with the communication port 21 is formed by the cylindrical portion 15a, the upper lid 16, the partition plate 28, and the partition cylinder 29.
A communication port 30a between the inside of the negative pressure chamber 13 and the inside of the negative pressure chamber 13 is formed.

The discharge section 31 includes the liquid tank 32, an impeller 33 disposed in the liquid tank 32 facing the discharge port 14, and a jet of water from above onto the outer periphery of the impeller 33 to discharge scum. The water injection device 35 is equipped with the water injection device 35 that promotes water vapor generation and sends out the high temperature water around the impeller 33 to the surroundings to suppress the generation of water vapor.

The impeller 33 is connected to the lower cylindrical body 19 of the extending cylindrical body 19.
b The water injection device 3 is arranged such that the upper inner circumferential edge of the blade 33a faces the lower outer circumferential edge of the impeller 33, and the water injection port 35a is located just outside the upper outer circumferential edge of the blade 33a of the impeller 33.
5 is supported by a support member 34 installed over the liquid tank 32.

A support shaft 37 is erected between the mounting flange 36 of the funnel-shaped body 17 at the lower end of the cylinder body 15 and the support member 34,
A support plate 38 protrudes radially outward from the outer surface of the funnel-shaped body 17
A pair of bearing portions 39a and 39b at the free end are fitted onto this support shaft 37.

The cylindrical body 15 and the funnel-shaped body 17 are connected by a bolt nut passing through a flange 36 of the cylindrical body 15 and a flange of the funnel-shaped body 17.

Further, a large-diameter stepped portion 37a is formed at the lower part of the support shaft 37, and a washer 40 that engages with the large-diameter stepped portion 37a is located below the lower bearing portion 39b with a slight gap. When the cylindrical body 15 and the funnel-shaped body 17 are disconnected from each other, the funnel-shaped body 17 can be supported by a support shaft 37 via a support plate 38 so as to be rotatable about its axis.

When the funnel-shaped body 17 is rotated, the extending cylinder 19 is divided into an upper cylinder 19a and a lower cylinder 19b.

A rotating shaft 41 has the impeller 33 fixed to its upper end, and is rotatably supported by a bearing 42 provided at the bottom of the liquid tank 32. A pulley 43 is fixed to its lower end, and the shaft 41 is connected to a pulley 45 attached to a drive motor 44. This pulley 43 and V
It is rotated by being wrapped around it with a belt or the like.

46 is a manhole formed in the cylindrical body 15, and 47 is a cooling water rotation suppressing plate disposed around the impeller 33, which is attached to the support member 34.

Next, to explain the operation, when the suction head 1 is positioned at a predetermined distance on the scum surface on the molten metal to be suctioned by the support device 4 while the suction device (not shown) is activated, the scum is suctioned together with the suction airflow. The scum is sucked into the head 1, cooled and solidified with ice, and then transferred through the suction pipe 2 toward the scum separator 3.

The suction airflow and scum that have reached the scum separator 3 flow out into the negative pressure chamber 13 via the suction flow inlet 22 and the suction material inflow pipe 24 .

Then, the suction airflow rapidly decreases its flow velocity because the cross-sectional area of the flow path increases rapidly, and changes direction and flows toward the communication port 21 with the suction device.On the other hand, since the scum has a heavy specific gravity, it is caused by inertia when flowing in. Go straight towards the discharge port 14,
The scum and suction airflow are separated.

The scum, which has been modified somewhat by the suction air flow, enters the outlet 14 after colliding with the truncated conical part of the funnel-shaped protective cylinder 20 .

The scum that has entered the discharge port 14 is finely crushed by an impeller 33 and discharged into the liquid in the fluid tank 32.

After the fine powder is removed by the outflow prevention member 26, the suction airflow becomes an even flow in the circumferential direction by the annular chamber 30, rises in the negative pressure chamber 13, passes through the annular chamber 30, and enters the suction device from the communication port 21. reach.

If the protective cylinder 20 is worn out due to collision with scum, after removing the liquid in the liquid tank 32, the cylinder 15 and the funnel-shaped body 17 are disconnected and the extending cylinder 19 is removed from the upper cylinder 1.
9a and the lower cylindrical body 19b, the separated waist funnel-shaped body 17 and the upper cylindrical body 19a are rotated around the support shaft 37, and the protective cylindrical body 20 is set outside the cylindrical body 15 as restored.

At this time, since the upper cylinder 19a is connected to the funnel-shaped body 17, it rotates along with the funnel-shaped body 17.

Further, when performing maintenance, inspection, repair, or replacement of the impeller 33, the work can be easily carried out by rotating the funnel-shaped body 17 and the upper cylinder 19a and then removing the water injection device 35 and the lower cylinder 19b as described above. .

In the above embodiment, only the scum separator was explained, but the present invention can also be applied to the separation of other granular materials from the suction airflow, and the configuration of the discharge section 31 may vary depending on the properties of the granular material. It can be changed arbitrarily.

As is clear from the above explanation, the separator of the present invention has a protective cylinder inside the funnel-shaped body, so that the suction that does not directly enter the outlet collides with this protective cylinder. It is guided to the discharge port, and it is possible to prevent abrasion of the inner wall surface of the negative pressure chamber and to ensure separation.

Moreover, if the protective cylinder becomes worn out, it can be easily replaced by rotating the funnel-shaped body and separating it from the negative pressure chamber.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is a schematic diagram of the scum removing device, Fig. 2 is a longitudinal cross-sectional view of the scum separating device, and Fig. 3 is a detailed view of the section shown by the arrow ◯ in Fig. 2. It is. 3...Scum separator, 13...Negative pressure chamber, 14...Discharge port, 15...Cylinder body,
17... Funnel-shaped body, 17a... Upper frustoconical part, 17b... Lower cylindrical part, 18...
... Tapered wall surface, 20 ... Protection cylinder, 21.
...Communication port with suction device, 22...Suction flow inlet, 31...Discharge section, 32...
Liquid tank, 33... Impeller, 34...
Support member, 37... Support shaft, 38... Support plate.

Claims (1)

[Scope of utility model registration request] A suction flow inlet is provided in a negative pressure chamber having a communication port with a suction device, a funnel-shaped body having a discharge port is removably connected to a portion of the negative pressure chamber at an axially extended position of the suction flow inlet, and configuring the funnel-shaped body to be able to rotate around a support shaft provided parallel to the axis at a position spaced apart from the funnel-shaped body,
A separation device characterized in that a funnel-shaped protective cylinder is detachably provided inside the funnel-shaped body and covers a tapered wall surface of the funnel-shaped body and a circumferential surface of the discharge port.