JPS5836607B2 - Sedimentation separator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for separating solids contained in a slurry using a gravity difference.

For example, used grinding oil in a factory contains chips and abrasive grains, so in order to reuse it, it is necessary to separate the chips and abrasive grains.

A sedimentation (or sedimentation) separation device is known as one of such slurry separation devices.

This method takes advantage of the fact that solids such as chips and abrasive grains have a greater gravity than grinding oil, allowing the solids to settle to the bottom of the sedimentation tank, and the accumulated residue is removed using a scraper conveyor or the like.

However, since the slurry is dropped into the settling tank from a drop-in port opened at the top of the settling tank, the falling energy of the falling slurry disturbs the slurry directly below the drop-in port.

This disturbance is propagated to the entire slurry in the sedimentation tank, causing so-called slurry dancing, causing solids attempting to settle to float around, and suspending solids, or residues, that have already settled, thereby inhibiting effective sedimentation. There was a drawback.

The present invention was developed based on the above circumstances, and its purpose is to suspend a filter so as to surround the surface on which the slurry is thrown, and to prevent the flow of the slurry due to disturbance of the slurry. The object of the present invention is to provide a sedimentation separator in which the solids captured by the filter are scraped off by a scraper conveyor, thereby improving the sedimentation effect.

An embodiment of the present invention will be described below based on drawings in which it is applied to a device for separating magnetic chips and abrasive grains in grinding oil.

In the figure, reference numeral 1 indicates a sedimentation tank, and one end of a frame 2 is disposed at the bottom of the sedimentation tank 1.

The other end of the frame 2 extends above the other side of the sedimentation tank 1.

A hopper 3 is formed at the upper end of one end of the frame 2, and the hopper 3 has a drop opening 4.

Note that a grinding oil pipe 5 led from a grinding machine or the like in a factory is opened above the grinder 3.

A scraper conveyor 6 is also attached to the frame 2.

This scraper conveyor 6 has a pair of left and right chains 7, 7.
In between, a scraper 8...... is spanned along the running direction of the chains 7, 70 with an interval between them. , 7 are wound and installed between driven sprockets 9, 9 which are pivotally supported on one end of the frame 2, and drive sprockets 10, 10 which are pivotally supported on the other end of the frame 2.

The drive sprocket No. 10 above is the conveyor drive motor 1
Accordingly, the chains 7, 7, in other words, the scraper conveyor 6, are driven to rotate at low speed in the direction of arrow A in FIG. 2, or continuously or intermittently.

In this case, the return path side 6 of the conveyor 6 is smaller than the outgoing path side 6a.
b is positioned above.

The chains 7, 7 are as shown in FIGS. 3 and 4,
It is guided by a chain guide 12, and a scraper 8 is installed on the chain link.

The scraper 8... has an oil-resistant and wear-resistant plate 14 held between holding plates 13, 13.

A permanent magnet 15 is arranged at the bottom of the frame 2.

This permanent magnet 15 is on the outgoing side 6a of the scraper conveyor 6.
The S-pole strip plate 17 is placed in the case 16.
a...... and the N-pole strip plate 17b are arranged in parallel with each other perpendicular to the running direction of the conveyor 60, and on the upper surface of the case 16 there is a lid body 1 made of a stainless steel plate or the like.
8 is coated.

In addition, each strip plate 17a, ? ? A filler 19 made of a non-magnetic material such as synthetic resin is interposed between the holes 1 and 2b.

The above part of the lid body 18 is a surface on which sediment is deposited, and the scraper 8 on the outgoing side 6a of the conveyor 6...
. . . moves in sliding contact with the upper surface of the lid body 18.

Therefore, the permanent magnet 15 constitutes a depositing and unloading surface.

The other end of this permanent magnet 15 is a damping magnet 20,
A residue removing device 21 is provided below.

The residue removal device 21 has a screw press 24 on the receiving plate 22.
The residue dropped onto the receiving plate 22 is passed through the inside of the drum 26 by the screw 25 to the discharge port 2.
It is designed to send out towards 7.

Note that the screw 25 is driven by a screw drive motor 28.

The screw press 24 has a function of squeezing out grinding oil contained in chips and abrasive grains as residue, and has a discharge port 24.
By removably attaching a stopper 29 to 7, chips and abrasive grains are pressed.

An oil return pipe 30 is connected to the lower surface of the drum 26, and this return pipe 30 is opened to the hopper 3.

A drum filter 31 is provided on the frame 2.

The drum filter 31 is a drum-shaped filter material such as a sponge, and is rotated by a filter drive motor 32 so that chips and abrasive grains adhering to the drum filter 31 are blown away by centrifugal force. .

This drum filter 31 is installed near the surface of the grinding oil in the sedimentation tank 1, and allows the grinding oil that has entered from the outside to pass inside, and at this time, the filter filters out chips and abrasive particles. ing.

An oil drain pipe 33 is opened in the drum 31, and the tip of the oil drain pipe 33 is opened to the outside of the sedimentation tank 1.

A filter 35 according to the present invention is suspended from the hopper 3.

This filter 35 is made of a filter material such as a sponge and has a sixth filter.
As shown in the figure below, the hopper 30 is provided so as to surround the input port 4, and therefore the filter 35
has a rectangular cylindrical shape.

The lower end of this filter 35 extends to near the bottom of the sedimentation tank 1, and the return path side 6b of the scraper conveyor 6
The scraper 8 is present in the locus of movement.

The lower end of this filter 35 is connected to the return side scraper 8.
The scraper 8 comes into contact with the filter 35 based on zero travel, thereby knocking off chips and abrasive grains captured by the filter 35.

Note that the interior of the filter 35 is divided into a plurality of settling chambers 37 by partition walls 36, 36 made of sponge or the like provided spaced apart in the direction in which the scraper 80 travels.

The operation of the embodiment based on such a configuration will be explained.

Grinding oil sent from the grinding machine via the grinding oil pipe 5 is discharged onto the hopper 3 and dropped from the drop-in port 4 of the hopper 30.

The grinding oil falling from the drop port 4 collides with the grinding oil surface in the filter 35, and the falling energy disturbs the liquid surface and the area below it.

However, since the dropping surface is surrounded by the filter 35, the grinding oil is only disturbed inside this filter 35.
The filter 35 blocks the propagation to the entire sedimentation tank 1, so that it does not spread.

In particular, since the inside of the filter 35 is divided into a plurality of settling chambers 37 by partition walls 36, the grinding oil dropped from the drop port 4 is It is dispersed and dropped into each sedimentation chamber 37.

For this reason, the falling energy exerted on each sedimentation chamber 37 becomes smaller, and the settling chamber 37...
The disturbance of the grinding oil that occurred in the partition wall 36...
Since the grinding oil is not transmitted to other adjacent settling chambers 37 by ..., there is little disturbance of the grinding oil within each settling chamber 37.

While the grinding oil dropped into the filter 35 passes through the filter 35, the chips and abrasive grains contained therein are captured by the filter 35, and each sedimentation chamber 37...
Inside, chips and abrasive grains settle due to gravity.

When the chips and abrasive grains settle near the bottom of the sedimentation tank 1, they are attracted to the permanent magnet 15 provided at the bottom and the lid body 18
Adheres to the top surface of the

The chips and abrasive particles accumulated on the upper surface of the lid body 18 are removed from the plate 1 based on the movement of the scraper conveyor 6 in the direction of arrow A.
4 and is conveyed along the upper surface of the permanent magnet 15.

Since the end of the permanent magnet 15 is a damping magnet 20, the chips and abrasive grains carried to the other end of the permanent magnet 15 separate from the permanent magnet 15 and fall onto the receiving plate 22.

Then, by the operation of the screw press 24, the chips and abrasive grains are pressed when the stopper 29 is attached, and the grinding oil contained therein is squeezed out.

This grinding oil is returned to the hopper 3 via a return pipe 30.

Further, the chips and abrasive grains that remain after squeezing out the grinding oil are removed from the discharge port 27 by removing the plug 29.

On the other hand, the grinding oil that has passed through the filter 35 flows out into the entire sedimentation tank 1, and after passing through the drum filter 31, the oil drain pipe 3
It is discharged from 3.

At this time, what remained in the sedimentation tank 1, that is, the filter 3
Since the chips and abrasive grains that were not captured in step 5 are captured by the drum filter 31, the grinding oil discharged through the oil drain pipe 33 does not contain chips and abrasive grains.

Therefore, filtration of chips and abrasive grains is reliably performed.

Therefore, the filter 35 provided below the drop port 4
However, since the lower end of the filter 35 is suspended within the traveling trajectory of the return path 6b of the scraper conveyor 6,
It is struck by the plate 14 of the scraper conveyor 6.

Therefore, since the filter 35 is shaken at regular intervals, chips and abrasive grains captured in the filter 35 are knocked off, thereby preventing clogging.

As a result, the filtration function of the filter 35 can be maintained for a long life, and the frequency of cleaning and replacement of the filter 35 can be reduced.

In addition, in the above example, the case of separation of magnetic chips and abrasive grains during grinding work was explained, but the present invention is not limited to only chips and abrasive grains, and can be applied to other sedimentation separations. Applicable to possible solids.

Further, the solid as the sedimentation residue is not limited to a magnetic material, but may also be a non-magnetic material such as aluminum stone, and therefore, a permanent magnet is not necessarily required as a depositing and transporting surface.

Further, the residue removing device 21 is not limited to the above embodiment, and if the residue is a magnetic material, a magnetic drum or the like may be used.

Furthermore, the drum filter 31 is not necessarily essential.

As described in detail above, in the present invention, a filter is hung around the surface onto which the slurry is thrown, and the lower edge of the filter extends so as to be in contact with the scraper on the return side of the scraper conveyor.

Therefore, according to this document, even if the slurry in the sedimentation tank is disturbed by the falling energy of the dropped slurry, this disturbance will not spread throughout the sedimentation tank because it is surrounded by a filter, and the accumulated residue will not be affected. Also, the residue that would try to settle is no longer suspended, and the settling performance is improved.

Furthermore, even if the filter is clogged with captured residue, the filter is struck by the scraper conveyor, so the residue is knocked off, thereby preventing clogging.

Therefore, there is an advantage that cleaning and replacement of the filter can be reduced.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a plan view and FIG.
The figure is a sectional view, and Figures 3 and 4 are shown in Figure 1, respectively.
FIG. 5 is a sectional view taken along line 1--1 in FIG. 3, FIG. 6 is a perspective view of the main part, and FIG. 1... Sedimentation layer, 3... Hopper, 4...
...Drop port, 6...Scraper conveyor,
6a...Outgoing conveyor, 6b...Returning conveyor, 15...゜゜゜Permanent magnet, 35...
...Filter, 36...Partition wall, 37...
...Sedimentation chamber.

Claims (1)

[Scope of Claims] 1. A surface onto which the slurry is dumped in a sedimentation separation device that dumps slurry from the dumping port of a sedimentation tank and removes the residue that settles and accumulates at the bottom of the sedimentation tank by the force of gravity using a scraper conveyor. A filter is hung around the filter, and the lower end edge of the filter extends so as to be in contact with the return side scraper of the scraper conveyor, so that the filter is swung by the scraper. Separation device. 2. The sedimentation separation device according to claim 1, wherein the filter is divided into a plurality of sedimentation chambers.