JP2002172538A - Dust separator and coolant purification system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust separator simple in flow adjustment of coolant, free from clogging by separated dust and easy in disposal of collected dust and in maintenance, and a coolant purification system using the dust separator. SOLUTION: A topped inner tube is vertically arranged in a topped outer tube to provide a double structure forming an annular void, which is divided by a vertically fixed partition plate. An inflow port supplied with coolant to be purified is opened in the side of the outer tube in the upper portion, a separating port is opened in the side of the inner tube at the lower end, and an outflow port for an outflow of purified coolant is formed in the side thereof in the upper portion. A sloping plate is liquid-tightly arranged in the annular void at a spiral slope extending from the upper end of one side of the partition plate to the lower end of the other side of the partition plate partitioned below the separating port while passing under the inflow port. A discharge port for a discharge of coolant containing separated dust is formed at the lower end of the inner tube.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust separating apparatus for separating dust such as chips and abrasives from a coolant used in a machine tool, and a coolant purifying system using the same.

[0002]

Conventionally, as coolant purification system,
As shown in FIG. 4, the auxiliary tank 43, the magnet type separator 47, the dirty tank 48, the cyclones 44, 4
Japanese Patent Application Laid-Open No. 10-217119 discloses a combination of the clean tank 49 and the clean tank 49. Spent coolant containing dust, such as abrasive grains, is supplied from the machine tool, such as a grinding machine 41 to the auxiliary tank 43, after being separated to some degree of the dust by gravity separation of the gravity type, is supplied to the magnet type separator 47 You. At this time, the magnetic substance dust contained in the coolant and the non-magnetic substance dust entrained with the magnetic substance dust are separated by adsorption and collected in the dust collection tank 51. Next, the coolant that has passed through the magnet type separator 47 flows into the dirty tank 48 from a tangential direction and makes a revolving motion inside the dirty tank 48. As a result, the dust contained in the coolant is separated and collected as a concentrated coolant containing a large amount of dust at the lowest part of the dirty tank 48. This concentrated coolant is pumped up by the cyclone 44 via a conduit located near the bottom of the dirty tank 48 and pumped in tangentially, and swirls in the cyclone 44 to further separate the dust. . The coolant containing little dust that overflows from above the cyclone 44 is returned to the dirty tank 48 through a conduit connected to the upper portion.
The coolant containing relatively little dust on the relatively upper side of the dirty tank 48 is supplied to each cyclone 4 for separating dust.
5 and 46, and flows in a tangential direction and swirls in each cyclone 45 and 46 to further separate the dust.

Next, the coolant containing dust separated by the cyclones 44, 45, 46 passes through a dust collecting passage arranged below the cyclones 44, 45, 46 and is collected in the auxiliary tank 43. . On the other hand, the purified coolant that has overflowed from above the cyclones 45 and 46 passes through the respective conduits and passes through the clean tank 4.
9. The coolant overflowing from the clean tank 49 is returned to the upstream side of the magnetic separator 47 through the overflow passage.
Finally, the purified coolant in the clean tank 49 is sucked by the pump 50 through a conduit and supplied to a machine tool such as a grinding machine.

[0004]

In such a conventional apparatus, dust accumulates and hardens in the auxiliary tank 43, making it difficult to remove the dust. In addition, the accumulated dust is returned to the dirty tank 48 again. There is a possibility of inflow. Also, when using a cyclone as a dust separation device, fine adjustment of the flow velocity for the coolant to swirl in the cyclone is necessary, and a conduit for discharging the coolant containing dust and a flow control valve attached to the conduit must be used. It tends to be clogged, and requires regular maintenance such as cleaning.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, a structural feature of the present invention according to claim 1 is that an outer cylinder having an upper surface and a vertically arranged double structure in the outer cylinder. an inner cylinder having top surfaces, perpendicular partition plate for partitioning the gap annular formed between the outer peripheral surface of the inner cylinder and the inner circumferential surface of the outer cylinder, of the partition plate to the outer cylinder upper An inlet through which coolant to be opened and purified near one surface side is supplied, a separation port opened at the lower side surface of the inner cylinder near the other surface side of the partition plate, and a purification opening at the upper part of the inner cylinder to purify The outlet through which the coolant flows out, the annular plate is inclined from the upper end of one surface of the partition plate to the lower end of the other surface of the partition plate at a position below the inlet through the lower portion of the inlet and to the lower end of the other surface of the partition plate. An inclined plate spirally and liquid-tightly provided in the gap, and a lower portion than the separation port of the inner cylinder; It is provided with an outlet for discharging the coolant that contains dust separated provided parts.

[0006] The structural features of the invention according to claim 2 are as follows.
2. The dust separation device according to claim 1, wherein the outflow ratio of the purified coolant flowing out from the outlet and the coolant containing the separated dust discharged from the outlet is 3 to 5: 1. .

[0007] The structural features of the invention according to claim 3 are as follows.
A coolant purification system using the dust separation device according to claim 1 or 2, wherein a used coolant pumped up from a dirty tank into which used coolant flows is supplied to a magnetic separator by a pump to supply used coolant. And, the non-magnetic material dust is separated by being entrained in the magnetic material dust, and the coolant pumped up by a pump from a recovery tank for storing the coolant flowing out of the magnet type separator is introduced into an inlet of the dust separating device, The purified coolant flowing out of the outlet is collected in a clean tank, sent out to a machine tool by a pump, and the outlet is connected to the dirty tank.

[0008] The structural feature of the invention according to claim 4 is as follows.
4. The coolant purifying system according to claim 3, wherein the dust is collected from the dirty tank and the recovery tank by a pump together with a coolant so that the dust is not accumulated in both tanks, and a dust collection point is separated by the magnetic separator. Is the only place where the information is collected.

[0009]

According to the first aspect of the present invention, since the coolant and the dust are separated by the specific gravity separation by the natural fall method, the coolant is stored in the tank as compared with the case where the cyclone is used. And there is no need to make fine adjustments to the flow rate of the coolant for efficiently separating dust. This also eliminates the need to attach a flow control valve to the conduit for discharging the coolant containing dust after separation in the dust separation device, and eliminates clogging of the conduit and the flow control valve due to dust.

In the invention according to claim 2 configured as described above, the outflow ratio of the purified coolant flowing out of the dust separating device and the coolant containing the separated dust discharged from the discharge port is 3 to 5. : 1 and the purification efficiency of the specific gravity separation by the natural fall method of the coolant and the dust is optimized, so that the dust can be separated very efficiently with high efficiency.

In the invention according to claim 3 configured as described above, the used coolant is supplied to the dirty tank, the coolant containing dust pumped up by the pump from the dirty tank is supplied to the magnetic separator, Dust and non-magnetic dust entrained in the dust are separated. The coolant from which most of the dust has been separated by passing through the magnetic separator is supplied to a collection tank, and the coolant containing dust pumped up from the collection tank by a pump is supplied to a dust separation device. The coolant purified by the dust separator is collected in a clean tank and supplied to machine tools.
The coolant containing the separated dust is returned to the dirty tank and circulates again in the system. This makes it possible to provide a coolant purifying system which is easy to maintain and can efficiently separate dust and purify the coolant satisfactorily.

[0012] In the invention according to claim 4 configured as described above, the dust is sucked up from the dirty tank and the recovery tank together with the coolant by a pump through each conduit, and the accumulation of dust in the dirty tank and the recovery tank is prevented. Since the dust collection point is limited to the dust collection tank attached to the magnetic separator, dust can be collected easily and efficiently.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dust separating apparatus and a coolant purifying system according to the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 2 denotes a coolant purification system, which is disposed in a factory and is connected to a machine tool such as a grinder 1. The grinder 1 is connected to a dirty tank 3 via a conduit 26, and the dirty tank 3 is connected to a magnetic separator 6 via a conduit 4 to which a pump 5 is attached, and the magnetic separator 6 is connected to a recovery tank 8 via a conduit 7. Is connected to The magnetic separator 6 is provided with a dust collection tank 24 for collecting dust separated by the magnetic drum. The recovery tank 8 is connected to an inlet of a dust separator 11 via a conduit 10 to which a pump 9 is attached. The upper part of the recovery tank 8 is a conduit 17
Is connected to the dirty tank 3 so that the overflowed coolant is returned to the dirty tank 3. The outlet of the dust separator 11 is a flow control valve 2
8 via a conduit 12 to which a clean tank 14 is attached.
Is connected to the dirty tank 3 via a conduit 13. The clean tank 14 is connected to a grinding machine or other machine tool via a conduit 16 on which a pump 15 is mounted. The upper portion of the clean tank 14 is connected to the collection tank 8 by a conduit 18.
The overflowed coolant is returned to the recovery tank 8.

As shown in FIG. 2 and FIG.
1 is an inner cylinder 31 having a vertically disposed upper surface in a double structure inside an outer cylinder 32 having a vertically disposed upper surface.
Is provided. An annular gap 39 is provided between the outer peripheral side surface of the inner cylinder 31 and the inner peripheral side surface of the outer cylinder 32, and the gap 3
9 are attached between the bottom and top surfaces inside the outer cylinder 32 and between the outer peripheral side surface of the inner cylinder 31 and the inner peripheral side surface of the outer cylinder 32. An inlet 61 through which coolant to be purified is supplied is provided on the upper side surface of the outer cylinder 32 with a partition plate 3.
4 is opened near one surface side, and a conduit 10 is connected. A separation port 33 is opened in the lower side surface of the inner cylinder 31 near the other surface side of the partition plate 34, and an outlet 62 through which purified coolant flows out is opened in the upper side surface of the inner cylinder 31. The conduit 12 is connected to the outlet 62 through a hole 63 at the upper side of the outer cylinder 32 in a liquid-tight manner. In the annular space 39, there is an inclined plate 35 which is inclined from the upper end of one surface of the partition plate 34, passes below the coolant inlet 61, and is spirally inclined to reach the lower end of the other surface of the partition plate 34. It is provided in a liquid-tight manner. An outlet 25 having a throttle for discharging the coolant containing the separated dust is provided at the bottom of the inner cylinder 31.
Are provided, and the conduit 13 is connected.

As shown in FIG. 1, a flow rate control valve 28 is attached to the purified coolant outflow conduit 12 of the dust separation device 11, and the flow rate is controlled by adjusting the opening of the flow rate control valve 28. The flow rate of the coolant containing dust and coolant is determined to optimize the purification efficiency.
５5: 1.

In the embodiment configured as described above,
As shown in FIG. 1, used coolant is tangentially supplied to a dirty tank 3 from a machine tool such as a grinder 1 and swirl moves in the dirty tank 3 to separate dust, and the dust in the dirty tank 3 is removed. A concentrated coolant with a high dust content is collected at the lowest part. The coolant in which the dust is concentrated is pumped up by a pump 5 via a conduit 4 arranged at the lowermost part in a dirty tank 3 and supplied to a magnetic separator 6. Thus, dust does not accumulate on the bottom of the dirty tank 3. In this way, since the coolant in which the dust is concentrated is supplied to the magnetic separator 6, not only the magnetic dust but also many non-magnetic dusts are entrained and separated by the magnetic dust, thereby improving the dust separation efficiency. I do. The dust separated by the magnetic separator 6 is collected in a dust collection tank 24, and the coolant from which most of the dust that has passed through the magnetic separator 6 has been removed is tangentially flown into the collection tank 8 via the conduit 7, Further, the circulating motion is performed in the collection tank 8 to separate the dust. Thereby, the coolant in which the dust collected in the lowest part of the collection tank 8 is concentrated is pumped up by the pump 9 via the conduit 10 arranged at the lowermost part in the collection tank 8 and supplied to the dust separation device 11. You. Thus, dust does not accumulate on the bottom of the collection tank 8. The coolant overflowing from the recovery tank 8 is returned to the dirty tank 3 via the conduit 17 and circulates again in the system.

The coolant in which the dust supplied to the dust separating device 11 is concentrated is separated by specific gravity in a space 39 between the inner cylinder 31 and the outer cylinder 32 by a free fall method, and the dust having a high specific gravity moves downward. While sliding, the sloping plate 35 inclined in a spiral shape slides toward the separation port 33. In the vicinity of the separation port 33, the coolant containing dust becomes two layers,
With the purified coolant in the upper layer and the coolant containing dust formed in the lower layer, the inner cylinder 31
Move inside the. Inside the inner cylinder 31, the purified upper layer coolant flows into the clean tank 14 via the outlet 12 through the conduit 12, and the lower layer coolant containing dust flows from the discharge port 25 to the dirty tank 3 via the conduit 13. Will be returned.

As shown in FIG. 1, the purified coolant collected in the clean tank 14 is supplied to a grinding machine or other machine tool by a pump 15 via a conduit 16 and pumped. The purified coolant overflowing from the clean tank 14 is supplied to the conduit 18
And returned to the collection tank 8 to circulate again in the system. Regarding the removal of the separated dust, since the dust is collected only at one location of the dust collection tank 24 of the magnetic separator 6, the dust may be removed from the dust collection tank 24.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire coolant purification system according to the present invention.

FIG. 2 is a perspective view showing an internal structure of the dust separating device.

FIG. 3 is a cross-sectional view taken along the inside of the front surface of the outer cylinder of the dust separating device.

FIG. 4 is a diagram showing an entire conventional coolant purification system.

[Explanation of symbols]

1, 41: grinding machine, 2, 42: coolant purification system, 3, 48: dirty tank, 4, 7, 1
0, 12, 13, 16, 17, 18, 26 ... conduit,
5, 9, 15, 50 ... pump, 6, 47 ... magnetic separator, 8 ... collection tank, 11 ...
Dust separation device, 14, 49 ... clean tank, 2
4, 51 ... dust collection tank, 25 ... outlet,
28: Flow control valve, 31: Inner cylinder, 32: Outer cylinder, 33: Separation port, 34: Partition plate, 35 ...
Inclined plate, 39: void, 43: auxiliary tank, 4
4, 45, 46: cyclone, 61: coolant inlet, 62: purified coolant outlet, 63
... A hole in the upper side of the outer cylinder.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B03C 1/10 B03C 1/10 A B23Q 11/10 B23Q 11/10 Z (72) Inventor Tatsuya Aoyama Aichi Toyota City Takaharu 6-chome 22 address Sakurai industry within Co., Ltd. (72) inventor Takeuchi Toyota City, Aichi Prefecture Satoshi Higashi Sumiyoshi address 50 Toyotsu engineering Co., Ltd. in the F-term (reference) 3C011 BB31 EE08 EE09

Claims (4)

[Claims] 1. An outer cylinder having an upper surface, an inner cylinder having an upper surface vertically arranged in a double structure in the outer cylinder, and a portion between an outer peripheral side surface of the inner cylinder and an inner peripheral side surface of the outer cylinder. A vertical partition plate for partitioning an annular space formed in the outer cylinder, an inflow port for supplying a coolant that is opened in the vicinity of one surface side of the partition plate on the upper part of the outer cylinder, and supplied with a coolant to be purified, and A separation port opened in the vicinity of the other surface of the partition plate, an outlet opened in the upper portion of the inner cylinder, through which the purified coolant flows, and an upper end of one surface of the partition plate passing below the inflow port. An inclined plate inclined downward to the lower end of the other surface of the partition plate at a position below the separation port and provided spirally and liquid-tight in the annular gap, and a lower portion of the inner cylinder below the separation port. An outlet for discharging coolant containing separated dust provided in the lower part. Characterized dust separation equipment. 2. The dust separating apparatus according to claim 1, wherein the ratio of the flow rate of the purified coolant flowing out from the outlet and the flow rate of the coolant containing the separated dust discharged from the discharge port is 3 to 5: 1. A dust separation device, characterized in that: 3. A coolant purifying system using the dust separating device according to claim 1 or 2, wherein a used coolant pumped up from a dirty tank into which used coolant flows is supplied by a pump to a magnetic separator. The magnetic material dust and the non-magnetic material dust which are entrained in the magnetic material dust are separated, and the coolant pumped by a pump from a recovery tank for storing the coolant flowing out of the magnetic separator is supplied to an inlet of the dust separating device. A coolant purification system, wherein the purified coolant that has been introduced and flows out from the outlet is collected in a clean tank, sent out to a machine tool by a pump, and the outlet is connected to the dirty tank. 4. The coolant purifying system according to claim 3, wherein the dust is collected from the dirty tank and the recovery tank by a pump together with a coolant so that the dust is not accumulated in both tanks, and the dust collecting point is defined by the magnetic separator. A coolant purifying system characterized in that only a place for collecting dust separated by air is provided.