JP6465786B2 - Sludge filtration equipment - Google Patents

Description

  The present invention relates to a filtration device that removes sludge from cutting fluid.

  A cutting fluid is used for suppressing friction or absorbing heat generated in a cutting portion of a metal cutting machine such as a lathe, a gear cutter, or a grinder, that is, between a processing blade and a work material. The cutting fluid poured into the cutting part is recirculated and stored in the cutting fluid tank for circulation, but the recirculated cutting fluid contains chips (metal powder) and other sludge. A filtration device for removing sludge is incorporated.

  An example of this type of filtration device is disclosed in Japanese Utility Model Laid-Open No. 3-126538. This divides the inside of the cutting fluid tank into a dirty tank and a clean tank in the order of the flow of the cutting fluid, embeds magnets on the respective bottom surfaces, and installs a chain conveyor equipped with a scraper for discharging sludge. And the height of the chain conveyor of a clean tank is made lower than the chain conveyor of a dirty tank, and the suction port for cutting fluid is arranged in the space formed between the conveyor and the tank upper surface plate. This eliminates the need to provide a separate suction tank following the clean tank, and is expected to be compact.

Japanese Utility Model Publication No. 3-126538

However, in the above conventional filtration device, sludge settled on the bottom of the cutting fluid tank can be discharged, but in addition to the cutting fluid in the cutting fluid tank, metal powder is collected and suspended in the upper layer containing air. There is also a sludge dispersed in the middle layer, and it is difficult to discharge the upper layer and middle layer sludge only by embedding a magnet at the bottom of the cutting fluid tank.
If the upper layer and middle layer sludge flows into the pipe to the cutting part, the flow sensor installed in the pipe is clogged, and normal supply to the cutting part cannot be performed.
For this reason, the upper layer and middle layer sludge must be manually collected and removed periodically or while observing the situation.

  Therefore, in view of this problem, an object of the present invention is to provide a sludge filtration device that can effectively remove sludge floating in a cutting fluid tank.

For this reason, the present invention comprises a main tank in which a cutting fluid recirculating from the cutting part is stored, and a main filtration part having a first sludge separation means,
The cutting fluid is supplied from the main filtration unit, and includes a sub-filtration unit having a sub tank and a second sludge separation unit,
The main tank of the main filtration unit includes first transport means for transporting the sludge settled on the bottom wall to the first sludge separation means side,
The sub-tank of the sub-filtration unit has a bottom wall shallower than the main tank, a magnet is provided at the bottom, and second transport means for transporting the sludge sucked by the magnet to the second sludge separation means side. Prepared,
The cutting fluid is supplied to the sub-filtering portion by supplying the cutting fluid in the middle layer of the main tank to the side opposite to the second sludge separating means of the sub tank, and the cutting fluid in the upper layer of the main tank bypassing the sub tank The sludge was supplied to the sludge separation means side.

  According to the present invention, the sludge settled in the lower layer of the main tank is collected by the first sludge separation means, and the sludge dispersed in the middle layer is attracted by the magnet in the sub-tank with the shallow bottom and accumulated on the bottom wall. As a result of the recovery by the second sludge separation means together with the sludge floating on the sludge, sludge over almost the entire depth of the cutting fluid in the main tank is effectively removed.

1 is an overall perspective view of a filtration device according to an embodiment. It is a figure which shows the detail of the main filtration part. It is a figure which shows arrangement | positioning of an upper layer suction pump and an intermediate | middle layer suction pump. It is a figure which shows the detail of a subfiltration part.

Embodiments of the present invention will be described below.
FIG. 1 is an overall perspective view of a filtration device according to an embodiment.
The filtration device 1 is configured by disposing a sub filtration unit 40 having a sub tank 45 above a main filtration unit 10 having a main tank 11.
First, the main filtration unit 10 will be described.
FIG. 2 is a diagram showing details of the main filtration unit 10, (a) is a plan view showing the main tank 11 of the main filtration unit 10 with the upper wall 12 (12 a, 12 b) removed, and (b) is in (a). It is an AA section sectional view.
As shown in FIG. 2A, the main tank 11 is partitioned by a partition wall 16 into a dirty tank 14 and a clean tank 15 as in the conventional case. A cutting fluid recirculating from a cutting unit (not shown) enters from the inlet 17 at one end of the dirty tank 14, flows in order from the dirty tank 14 to the clean tank 15, and is cut by the delivery pump 18 provided at the outlet of the clean tank 15. It is sent to a pipe 19 (see FIG. 1) for supplying to the section. A flow sensor 19 a is attached to the pipe 19.

As shown in FIG. 2B, a magnet conveyor 20 having a belt 22 (not shown) and a magnet 22 mounted thereon is provided below the bottom wall 13 of the main tank 11. The magnet conveyor 20 extends along the bottom wall 13 in the longitudinal direction of each of the dirty tank 14 and the clean tank 15, and the sludge settled on the bottom wall 13 is sucked by magnetic force so that the inlet 17 and the delivery pump 18 of the main tank 11 are Sweeping is performed in the direction of the other end opposite to the one end positioned. A magnet separator 24 is installed at the other end of the main tank 11, and the sludge S swept by the magnetic force of the magnet conveyor 20 is separated from the cutting fluid and collected in a sludge receiver 26 (see FIG. 1). .
The other end portion of the bottom wall 13 is an inclined surface 13a that climbs toward a relatively high position drum 25 of the magnet separator 24, and the end portion of the magnet conveyor 20 is also along the inclined surface 13a.

An upper layer suction pump 28 and an intermediate layer suction pump 29 are installed on the upper wall 12 of the main tank 11, and the suction ports 28a and 29a are extended into the cutting fluid, respectively. These feed the cutting fluid to the sub-filtration unit 40.
FIG. 3 is a cross-sectional view taken along the line BB in FIG.
The middle layer suction pump 29 is disposed on the upper wall 12 b of the clean tank 15, and the upper layer suction pump 28 is disposed on the upper wall 12 a of the dirty tank 14 upstream of the middle layer suction pump 29. The suction port 29a of the middle layer suction pump 29 opens at an intermediate position of the cutting fluid level, and the suction port 28a of the upper layer suction pump 28 is higher than the suction port 29a of the middle layer suction pump 29, so The opening is slightly lower than the surface L.

Next, returning to FIG. 1, the sub-filter 40 is supported by a plurality of legs 3 a and 3 b extending from the upper wall 12 and the like of the main tank 11 of the main filter 10.
The sub-tank 45 of the sub-filtration unit 40 is shallower than the main tank 11 and has a flat appearance.
4A and 4B are views showing the details of the sub-filtering portion 40, wherein FIG. 4A is a plan view showing the sub-tank 45 with the upper wall 46 removed, and FIG. 4B is a cross-sectional view taken along the line CC in FIG. It is.
A front chamber 41 having a bottom wall 42 that is deeper than the sub tank 45 and therefore lower than the bottom wall 47 of the sub tank 45 is attached to one end of the sub tank 45.
The cutting fluid sucked up by the middle layer suction pump 29 flows into the front chamber 41 through the pipe 31 and then flows into the sub tank 45 from the front chamber 41.

A rear chamber 50 is attached to the other end of the sub tank 45, and subsequently, a magnet separator 52 and a sludge receiver 53 are sequentially installed on the common base 55. The rear chamber 50 is also deeper than the sub tank 45.
In the present embodiment, since the common base 55 on which the rear chamber 50, the magnet separator 52, and the sludge receptacle 53 are placed protrudes outside the plane area of the main tank 11, some legs that support the common base 55 are supported. 3 b stands from the installation base 2 of the main tank 11.

A magnet 48 is spread on the bottom of the sub-tank 45, here the bottom surface of the bottom wall 47, and sludge in the cutting fluid is attracted and precipitated by magnetic force. Since the sub tank 45 is shallow, sludge floating in the cutting fluid is efficiently collected and deposited on the bottom wall 47 by the magnetic force of the magnet 48.
In the sub tank 45, a wiper-like scraper 49 that is driven by a drive unit 49a and is slidable from one end to the other end is provided, so that sludge accumulated on the bottom wall 47 is scraped off to the rear chamber 50. It has become.
In addition, since the sludge solidified to some extent is deposited at the bottom deeper than the sub tank 45 in the front chamber, it is avoided that the sludge is excessively accumulated in the sub tank 45.

The cutting fluid sucked up by the upper layer suction pump 28 also flows into the rear chamber 50 through the pipe 30. The sludge contained in the cutting fluid sucked up by the upper layer suction pump 28 contains air and is suspended in the upper layer of the cutting fluid in the main tank 11 and does not need to be adsorbed again by the magnet, so the sub tank 45 is bypassed. Then, it is directly supplied to the rear chamber 50. Further, as with heavy sludge, excessive accumulation in the sub tank 45 is also avoided.
The magnet separator 52 separates sludge from the cutting fluid in the rear chamber 50 and collects it in the sludge receiver 53.
The cutting fluid from which the sludge has been removed is returned to the vicinity of the inlet 17 in the dirty tank 14 of the main tank 11 through the pipe 56.

In the present embodiment, the magnet separator 24 corresponds to the first sludge separation means in the invention, and the magnet separator 52 corresponds to the second sludge separation means. The magnet conveyor 20 corresponds to the first transport unit, and the scraper 49 corresponds to the second transport unit.
The installation site of the delivery pump 18 in the main tank 11 corresponds to the delivery port of the cutting fluid to the cutting part in the invention.

The embodiment is configured as described above, and the main filtration unit 10 having the main tank 11 storing the cutting fluid recirculated from the cutting unit, the magnet separator 24, and the cutting fluid is supplied from the main filtration unit 10. In addition, the main tank 11 includes a magnet conveyor 20 that conveys sludge settled on the bottom wall 13 to the magnet separator 24 side, and the sub tank 45 includes a sub tank 45 and a magnet separator 52. The bottom wall 47 is shallower than the main tank 11, a magnet 48 is provided on the bottom surface of the bottom wall 47, and a scraper 49 for conveying sludge attracted by the magnet 48 to the magnet separator 52 side is provided. The cutting fluid in the middle layer is on the opposite side of the sub tank 45 from the magnet separator 52. Since the cutting fluid in the upper layer of the main tank 11 bypasses the sub tank 45 and is supplied to the magnet separator 52 side, the sludge that has settled in the lower layer of the main tank 11 is recovered by the magnet separator 24 and is collected in the middle layer. Since the dispersed sludge is attracted by the magnet 48 in the sub-tank 45 having a shallow bottom and accumulated on the bottom wall 47, it can be transported to the magnet separator 52 by the scraper 49, and sludge floating on the upper layer of the main tank 11 is also magnetized. As a result of being directly supplied to the separator 52 side and recovered, sludge over almost the entire depth of the cutting fluid in the main tank 11 is effectively removed.
(Effects corresponding to claim 1)

The main tank 11 is composed of a dirty tank 14 and a 15 clean tank that are partitioned by a partition wall 16 and communicate with each other to form a passage of the cutting fluid from the inlet 17 to the outlet, and the middle-layer cutting fluid is a clean tank 15 on the downstream side. The upper-layer cutting fluid is sucked up by the upper-layer suction pump 28 from the dirty tank 14 upstream where the cutting fluid inlet 17 is formed and is supplied to the sub-filtration unit 40. Since the sludge is sucked up first, the possibility that the middle layer suction pump 29 sucks up to the upper layer sludge is reduced, and excessive accumulation of sludge in the shallow sub-tank 45 is avoided.
(Effects corresponding to claims 2 and 3)

Since the delivery pump 18, the upper layer suction pump 28, and the middle layer suction pump 29 for sending the cutting fluid to the cutting part are respectively installed on the upper wall 12 of the main tank 11, the entire filtering device 1 is configured to be simple and compact. .
(Effects corresponding to claim 4)

The sub tank 45 is provided with a front chamber 41 on the side opposite to the magnet separator 52 and a rear chamber 50 on the magnet separator 52 side. The magnet separator 52 faces the rear chamber 50 and cuts the middle layer of the main tank 11. The liquid is supplied to the front chamber 41, the upper layer cutting fluid is supplied to the rear chamber 50, and the front chamber 41 and the rear chamber 50 are deeper than the sub tank 45, respectively. 41, sedimentation at the sub-tank 45 is avoided, and sludge accumulated on the bottom wall 47 of the sub-tank 45 is scraped to the rear chamber 50 every time the scraper 49 is driven to clear the bottom wall 47. it can.
(Effects corresponding to claim 5)

Moreover, since the sub filtration part 40 is arrange | positioned above the main filtration part 10, the ground contact area of the filtration apparatus 1 whole may be small, and also it is a pump for returning the cutting fluid which passed the magnet separator 52 to the main tank 11. Do not need.
(Effect corresponding to claim 6)

  In the embodiment, the magnet 48 in the sub-filter unit 40 is attached to the lower surface of the bottom wall 47 of the sub-tank 45. However, the magnet 48 may be attached to the upper surface of the bottom wall 47. It is preferable to cover with a cover. Thereby, since sludge accumulates on the cover, the scraper 49 can be smoothly scraped into the rear chamber 50 without being caught by the magnet 48.

In the main filtration unit 10, the magnet conveyor 20 is used as the first conveying means, but a scraper similar to the sub-filtration unit 40 may be used by spreading magnets on the bottom of the main tank 11.
Conversely, the second conveying means in the sub-filtering unit 40 can also employ the same conveyor as the main filtering unit 10 instead of the scraper 49.

DESCRIPTION OF SYMBOLS 1 Filtration apparatus 2 Installation base 3a, 3b Leg 10 Main filtration part 11 Main tank 12 Upper wall 13 Bottom wall 13a Inclined surface 14 Dirty tank 15 Clean tank 16 Bulkhead 17 Inlet 18 Delivery pump 19 Piping 19a Flow sensor 20 Magnet conveyor 22 Magnet 24 Magnet separator 25 Drum 26 Sludge receiver 28 Upper layer suction pump 28a Suction port 29 Middle layer suction pump 29a Suction port 30 Piping 31 Piping 40 Sub filtration section 41 Front chamber 42 Bottom wall 45 Sub tank 46 Upper wall 47 Bottom wall 48 Magnet 49 Scraper 49a Drive 50 Rear chamber 52 Magnet separator 53 Sludge receiver 55 Common base 56 Piping S Sludge

Claims (6)

A main tank having a main tank in which cutting fluid recirculating from the cutting unit is stored, and a first sludge separation means;
The cutting fluid is supplied from the main filtration unit, and includes a sub-filtration unit having a sub-tank and a second sludge separation unit,
The main tank of the main filtration unit includes first transport means for transporting sludge settled on the bottom wall to the first sludge separation means side,
The sub-tank of the sub-filtration section has a bottom wall shallower than the main tank, a magnet is provided at the bottom, and a second sludge that sucks the sludge attracted by the magnet to the second sludge separation means side. A transport means,
Supply of the cutting fluid to the sub-filtration unit,
The cutting fluid in the middle layer of the main tank is supplied to the side of the sub tank opposite to the second sludge separation means,
The sludge filtering device according to claim 1, wherein the cutting fluid in the upper layer of the main tank is supplied to the second sludge separation means side, bypassing the sub tank.   The sludge filtration device according to claim 1, wherein the upper layer cutting fluid is sucked and supplied on the inlet side of the circulating cutting fluid from a position where the middle layer cutting fluid in the main tank is sucked up. In the main tank, a dirty tank in which an inlet for flowing cutting fluid is formed and a clean tank in which an outlet for cutting fluid to a cutting part is partitioned and communicated with each other, and communicated from the inlet. It forms a passage of cutting fluid to the delivery port,
The upper layer cutting fluid is sucked up by the upper layer suction pump from the dirty tank,
The sludge filtration device according to claim 2, wherein the middle layer cutting fluid is sucked up from the clean tank by a middle layer suction pump.   The sludge filtration device according to claim 3, wherein the feed pump for sending the cutting fluid to the cutting portion, the upper layer suction pump, and the middle layer suction pump are each installed on the upper wall of the main tank. The sub tank is provided with a front chamber on the side opposite to the second sludge separation means, and a rear chamber is provided on the second sludge separation means side,
The second sludge separation means faces the rear chamber.
The cutting fluid in the middle layer of the main tank is supplied to the front chamber,
The cutting fluid in the upper layer of the main tank is supplied to the rear chamber,
The sludge filtration device according to any one of claims 1 to 4, wherein each of the front chamber and the rear chamber has a bottom wall deeper than the sub tank.   The sludge filtration device according to any one of claims 1 to 5, wherein the sub-filtration unit is disposed above the main filtration unit.

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