JP3107375B2 - Oil mist collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil mist collecting device, and more particularly, to removing oil mist generated from a plurality of machine tools disposed in a factory and removing clean air to the atmosphere. While discharging, collect the removed oil,
The present invention relates to an oil mist collecting device suitable for circulating use.

[0002]

2. Description of the Related Art As shown in FIG. 13, a large number of machine tools 36 are arranged in a factory building 46. Machine tool 36
There are various types, for example, FIGS. 14 and 1
The cutting machine 47 shown in FIG. As shown, the cutting machine 47 is provided with a headstock 49, a tailstock 50, and a cutting tool 51 for holding a workpiece 48, and an oil supply device 5 for supplying cutting oil at the time of cutting.
2 and a cleaning device 53 are additionally provided. 13 to 1
As shown in FIG. 5, a machine tool 36 that uses cutting oil, such as a cutting machine 47, may be housed in the isolation chamber 37, but is often arranged in an open state.

An oil supply device 52 includes an oil tank 54
And an oil pump 55 that supplies oil to the cutting position, an oil ejection pipe 56, and the like. The oil supplied to the workpiece 48 from the oil ejection pipe 56 becomes a mist and becomes a gaseous medium (hereinafter, referred to as air) by being mixed with water vapor in the air. When this air is released into the building 46 as it is, the building 4
6 is contaminated, and the air is discharged to the outside through the cleaning device 53. In general, as shown in FIG. 13, a duct 38 is connected to each machine tool 36 side without disposing a cleaning device 53 for each machine tool 36, and the duct 38 is connected via a focusing duct 39 to an electric dust collector 57 (also using a blower). The model connected to the side is adopted. That is, each machine tool 3
All the air generated from the side 6 is introduced into the electric dust collector 57, only the oil mist in the air is removed, and only the purified air is discharged.

FIG. 16 shows a schematic structure of a main part of the electric dust collector 57 relating to removal of oil mist. That is, when the air 26 hits the ionization part 58 at the tip of the needle electrode, oxygen in the air 26 becomes a positive ion, and an oil mist or the like adheres to the ion to form a positive fine particle 59. The fine particles 59 are directly attached to the dust collecting electrode 60 having a negative potential and are also splashed to the corresponding electrode 61 having a positive potential at the center and adhere to the dust collecting electrode 60.
Therefore, all the oil mist and the like are captured by the dust collecting electrode 60 and only the clean air 62 is discharged.

[0005]

However, the above-mentioned prior art has the following problems. That is, the oil mist and the like adhere to the inside of the duct 38 and also to the focusing duct 39. Then, the attached oil mist is aggregated to be an oil component and stored. Also, some oil is stored on the discharge duct 41 side. If this oil is left as it is, the smooth flow of air is obstructed. In the prior art, as shown in FIG. 13, drain pipes 62 and 63 are provided in the focusing duct 39 and the discharge duct 41.
Are connected. This drain pipe 62,
The oil stored through 63 is introduced into recovery tanks 64 and 65.

However, since a large amount of oil is stored in the recovery tanks 64 and 65 in a short period of time, the operation of draining the stored oil in the recovery tanks 64 and 65 is required many times, and many treatment steps are required. And Further, as described above, oil adheres to the inside of each duct 38, and the oil accumulates and drops on the machine tool 36 side. Further, since a large amount of oil sequentially adheres to the dust collecting electrode 60 of the electric dust collector 57, the dust collecting electrode 60 needs to be cleaned occasionally. Electric dust collector 5
7 is made of a large size, and cleaning of the dust collecting electrode 60 requires a lot of man-hours and cost. Furthermore, the collection tank 6
Many kinds of oil components are mixed in 4,65. Therefore, it is generally difficult to circulate and use the oil in the recovery tanks 64 and 65. As a result,
There is a problem that a large amount of industrial waste oil is generated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and it is possible to reliably and easily remove an illuminant for each machine tool and to circulate the collected oil. It is intended to provide a device.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is based on an intake unit for sucking a gas contaminated with oil mist, and a gas suction unit for sucking the gas sucked from the intake unit. An oil mist capturing section that captures the oil mist with a porous filter, an oil storage section for storing the oil mist aggregate captured by the oil mist capturing section as collected oil, and the oil mist is removed. An oil mist collecting device comprising an exhaust part for discharging the gas, wherein the oil storing part is disposed on an upstream side and receives the recovered oil and temporarily stores the primary oil storing part. A secondary oil storage unit disposed downstream to receive and store the recovered oil discharged from the primary oil storage unit, and the primary oil storage unit Between the next oil reservoir, a first switching means for the said primary oil reservoir and the secondary oil reservoir in communication with or cut off state is inserted, and,
Between the secondary oil storage unit and the atmosphere outside the device, the secondary oil storage unit and the atmosphere outside the device are set in a communication state or a cutoff state, so that the secondary oil storage unit is stored in the secondary oil storage unit. A second opening / closing means for discharging the collected oil to the outside of the apparatus or preventing the collected oil from being discharged is interposed.

According to a second aspect of the present invention, there is provided the oil mist collecting device according to the first aspect, wherein the gas contaminated with the oil mist is sucked into the suction portion and the oil mist is removed. A blower for discharging gas to the exhaust unit is provided.

According to a third aspect of the present invention, there is provided the oil mist trapping device according to the first aspect, wherein the oil mist trapping portion has an opening for introducing the gas contaminated with the oil mist. It is characterized by having a container-like porous filter.

According to a fourth aspect of the present invention, there is provided the oil mist trapping device according to the third aspect, wherein the hollow container-shaped porous filter in the oil mist trapping portion is contaminated with oil mist. Is provided with the opening for introducing the liquid crystal facing upward.

According to a fifth aspect of the present invention, there is provided the oil mist trapping device according to the third or fourth aspect, wherein the oil mist trapping portion is provided in addition to the hollow container-shaped porous filter.
A plate-shaped porous auxiliary filter is also provided, and the porous auxiliary filter is disposed downstream of the porous filter.

[0013] The invention according to claim 6 is based on claim 1,
The oil mist collecting device according to 3, 4, or 5, wherein the oil storage portion is provided below the oil mist capturing portion.

According to a seventh aspect of the present invention, there is provided the oil mist collecting device according to the sixth aspect, wherein when the oil mist captured by the porous filter aggregates to form a recovered oil, the recovered oil is: After passing through the porous filter,
It is characterized in that it is configured to drop or flow down, to be received and stored in the oil storage unit.

The invention according to claim 8 relates to the oil mist collecting device according to claim 6, wherein when the oil mist captured by the porous auxiliary filter aggregates to form recovered oil, the recovered oil is also recovered. It is characterized in that it is configured to drop or flow down from the porous body auxiliary filter, be received by the oil storage unit and stored.

The invention according to claim 9 is the first invention.
The oil mist collecting device according to 3, 4, 5, 7, or 8, wherein the porous filter or the porous auxiliary filter is detachably mounted.

According to a tenth aspect of the present invention, there is provided the oil mist collecting device according to the first, third, or fourth aspect, wherein the flow rate of the gas to be sucked at the front end opening of the intake section is set to 1. The average value of the flow velocity distribution of the gas passing through each section of the porous filter in the oil mist capturing section is set to 1/10 to 1/100.

According to an eleventh aspect of the present invention, there is provided the oil mist collecting device according to the first, third, or fourth aspect, wherein the sectional area at the tip end of the intake portion is 1, The total surface area of the porous filter is 10
It is characterized in that it is set to 100 times.

[0019]

[0020]

[0021]

The invention according to claim 12 is the first invention.
1. The oil mist collection device according to 1, wherein the device is interposed between the outside air and the primary oil storage unit and the secondary oil storage unit, and is disposed between the outside air and the primary oil storage unit. Alternatively, an opening / closing switching means for selectively setting a communication state or a cutoff state between the outside air side of the apparatus and the secondary oil storage unit is added.

The invention according to claim 13 is the first invention.
2. The oil mist collecting device according to item 2, wherein the first opening / closing means, the second opening / closing means, and the opening / closing switching means are configured to be automatically controlled in association with each other.

The invention according to claim 14 is the first invention.
3. The oil mist collection device according to claim 3, wherein the first opening / closing means, the second opening / closing means, and the opening / closing switching means are provided at predetermined opening / closing timings corresponding to the amount of recovered oil stored in the primary oil storage section. It is characterized by being configured to be automatically associated with each other.

Further, the invention according to claim 15 provides the invention according to claim 1.
15. The oil mist trapping device according to 3 or 14, wherein A is a communication port of the open / close switching means to the atmosphere outside the device, B is a communication port to the primary oil storage part, and B is a secondary oil storage part. When the communication port to C is C, the opening / closing timing is such that the first opening / closing means closes, the second opening / closing means opens, the opening / closing switching means AC opens, BC closes, B- A control timing of a predetermined time consisting of A closing, the first opening / closing means opening, the second opening / closing means closing, the opening / closing switching means BC opening, A-
It is characterized in that automatic control is performed so as to sequentially and repeatedly perform control timings of a predetermined time including C closing and AB closing, respectively.

[0026] Further, the invention according to claim 16 is based on claim 1.
According to the oil mist collection device described above, on the subsequent stage of an exhaust unit for discharging gas, an electric dust collection unit for capturing fine particles in the gas by electric control is provided. I have.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. The description will be specifically made using an embodiment. First Embodiment FIG. 1 is a sectional view showing a mechanical configuration of an oil mist collecting device according to a first embodiment of the present invention, and FIG. 2 is a building showing an arrangement state of the oil mist collecting device. Sectional view of FIG. 3
FIG. 4 is a plan view of a nickel metal filter used as an oil mist filter in the oil mist collecting device, FIG.
Is a partially enlarged cross-sectional view of the nickel metal filter of FIG. 3,
7 to 11 are explanatory diagrams used for explaining the operation of this example. The oil mist collecting device 1 of this example is
Many machine tools 36 arranged in a building (factory) 46
It is arranged every. Ducts 38 are respectively connected to the oil mist collecting device 1, and each duct 38 is a focusing duct 39.
To the centralized blower 40. A discharge duct 41 opening to the atmosphere side is connected to the centralized blower 40. In addition, a drain collection duct 42 for removing drain (water) accumulated in the collection duct 39 is connected to the collection duct 39, and a drain collection for removing drain (water) accumulated in the discharge duct 41 is also connected to the discharge duct 41. The duct 43 is connected. The drain introduced into the drain collection ducts 42 and 43 is introduced into the drain collection tanks 44 and 45. As described above, the oil mist generated from each machine tool 36 is removed by the oil mist collecting device 1, and only the clean air is discharged out of the building 46 through the duct 38, the focusing duct 39 and the like. .

Next, the overall structure of the oil mist collecting device 1 of this embodiment will be described with reference to FIG. The oil mist collecting device 1 includes an apparatus main body 2 and an oil mist filter section (oil mist capturing section) 3 disposed therein.
A first oil reservoir connected to the primary oil reservoir 7 of the apparatus main body 2
Primary solenoid valve 4 which is one of opening and closing means
A second oil reservoir connected to the secondary oil reservoir 8 of the apparatus main body 2.
Secondary solenoid valve 5 which is one of the opening / closing means
And a switching valve (opening / closing switching means) 6.

The apparatus main body 2 is formed of a cavity surrounded by an outer plate 9 and includes a primary flow velocity reduction chamber 11, a secondary flow velocity reduction chamber 12, and a primary flow velocity reduction chamber 11 defined by a flow path separator 10. Suction unit 13 for connecting and sucking air 26
An exhaust unit 14 connected to the secondary flow velocity reduction chamber 12 and discharging the purified air; a primary oil storage unit 7 formed below the primary flow velocity reduction chamber 11; A secondary oil storage section 8 formed below the oil storage section 7 is provided. An opening 15 is formed between the primary flow velocity reduction chamber 11 and the secondary flow velocity reduction chamber 12.

In this example, the suction section 13 has a tip opening cross-sectional area of about 78.5 cm ² (see FIG. 7).
A suction port 16 is formed. The primary flow velocity reduction chamber 11 communicating with the suction section 13 is of an upward open type (opening
0 cm ² ) and is composed of a hollow space in the shape of a hollow container. Further, the partition passage 15 between the primary flow velocity reduction chamber 11 and the secondary flow velocity reduction chamber 12 and the secondary flow velocity reduction chamber 12 have a cross-sectional area of about 300.
cm ^2, and the exhaust part 14 communicating therewith
Has an opening cross-sectional area of about 78.5 cm ² , and forms an outlet 17.

Next, the oil mist filter portion 3 of this embodiment will be described with reference to FIGS. The oil mist filter section 3 in this example includes a primary oil mist filter (porous filter) 18 and a secondary oil mist filter (porous auxiliary filter) 19. In addition,
As primary and secondary oil mist filters 18 and 19,
In this example, a combination product or a single product of a known nickel metal filter 20 (manufactured by Nippon Heavy Chemical Industry Co., Ltd.) is adopted. The nickel metal filter 20
As shown in FIG. 3 and FIG.
It is made of a porous solid body obtained by impregnating urethane foam with nickel powder and sintering the nickel powder. It has a function of efficiently removing oils and fats, oily smoke, water vapor, and the like. In particular, the oil mist removal rate can exhibit an excellent removal rate of 92% or more. Further, it has a feature that pressure loss is small.

As shown in FIG. 1, the primary oil mist filter 18 is disposed in the primary flow velocity reduction chamber 11, and has a side surface and a bottom surface having a side surface nickel metal filter (porous filter) 18a having a thickness of about 15 mm and a bottom surface nickel metal filter 18a. It has a frame shape (hollow container shape) surrounded by a metal filter 18b, and has an opening (opening cross-sectional area approximately 180 cm ² ) 21 formed only on the upper side communicating with the suction portion 13 side.
Here, the total surface area of the porous nickel metal filter 20 is set to approximately 1.076 cm ² , and is extremely large when viewed from other portions of the apparatus main body 2. As shown in the figure, the primary oil mist filter 18 is disposed substantially vertically with the opening 21 opposed to the bottom surface 18b, and the upper end of the primary oil mist filter 18 is
Supported on the side. Therefore, in this example, the intake unit 1
Assuming that the cross-sectional area of the tip opening of No. 3 is 1, the total surface area of the nickel metal filter 20 constituting the primary oil mist filter 18 is set to approximately 13.7 times. By setting the cross-sectional area ratio in this manner, assuming that the flow rate of the sucked air 26 at the front end opening of the intake section 13 is 1, the primary oil mist filter 18 has an average of the flow rate distribution of the air passing through each section. The flow rate is reduced to approximately 1 / 13.7.

On the other hand, the secondary oil mist filter 19
It is composed of one (plate-shaped) nickel metal filter 20 and is disposed obliquely in the secondary flow velocity reduction chamber 12,
3 and 23 support the apparatus body 2.

FIG. 5 is a schematic diagram for explaining the function of the nickel metal filter 20. As shown in FIG. 5, air 2 mixed with oil mist 24 and water vapor 25
When 6 strikes the nickel metal filter 20, the oil mist 24 is almost captured because the nickel metal filter 20 is porous and has a very large surface area, and only the water vapor 25 travels through the nickel metal filter 20. The oil mist 24 captured by the nickel metal filter 20 is sent to the recovery side as indicated by arrow A in the figure.

FIG. 6 shows the pressure loss characteristics of the nickel metal filter 20 used in this example and those of other types of baffle type filters and ceramic type filters. In this figure, the horizontal axis shows the wind speed (m / sec) of the air 26, and the vertical axis shows the pressure loss (mmAq). From this figure, it can be seen that the nickel metal filter 20 has extremely low pressure loss as compared with the other filters. On the other hand, if the average flow velocity passing through the nickel metal filters 18a, 18b, 20 exceeds 3 (m / sec), the oil mist itself may pass through without being captured. Therefore, in this example, by setting the average flow velocity passing through the primary oil mist filter 18 (the nickel metal filters 18a and 18b) to 1 (m / sec) or less, the pressure loss is extremely reduced, and the oil mist is reliably reduced. To be captured.

Next, the primary solenoid valve 4 and the secondary solenoid valve 5 will be described with reference to FIG. Primary solenoid valve 4 in this example
Comprises an electromagnetic valve main body 27 automatically controlled by a control device (not shown), and an inlet pipe 28 and a discharge pipe 29 thereof. The suction-side pipe 28 communicates with the primary oil storage unit 7, and the discharge-side pipe 29 communicates with and is connected to the secondary oil storage unit 8. On the other hand, the secondary solenoid valve 5 includes an electromagnetic valve body 30 that is automatically controlled by the control device, and an inlet-side pipe 31 and a discharge-side pipe 32. The suction-side pipe 31 communicates with the secondary oil reservoir 8, and the discharge-side pipe 32 opens to the atmosphere.

Next, the switching valve 6 will be described. The switching valve 6 comprises a three-way switching valve, and comprises communication ports A, B and C. The communication port A communicates with the atmosphere, the communication port B communicates with the cavity of the apparatus main body 2 having the primary oil storage section 7, and the communication port C communicates with the secondary oil storage section 8. Although the communication ports A and B are provided in the main body 6a of the switching valve 6, the communication port C is connected to the main body 6a by the air release tube 33.

Next, the operation of the oil mist collecting device 1 having the above-described structure (a method of removing the oil mist 24 in the air 26 and its collection and circulation operation) will be described with reference to FIGS. Oil mist 2 emitted from the machine tool 36
The air 26 containing the air 4 is supplied to the machine tool 36 as shown in FIG.
It is introduced from the side through the suction port 16 into the suction section 13 of the oil mist collecting device 1. As shown in the figure, in this example, air 26 is introduced into the suction section 13 having a cross-sectional area of about 78.5 cm ^{2 at} a flow rate of about 10 m / sec. This air 26
Is introduced into the primary flow velocity reduction chamber 11, but as described above, since the opening cross-sectional area is approximately 180 cm ² , the flow velocity of the introduced air 26 is reduced to approximately 4.36 m / sec. The air 26 at this flow rate is introduced into the primary oil mist filter 18. Primary oil mist filter 18
Is composed of a filter having a large surface area composed of a side nickel metal filter 18a and a bottom nickel metal filter 18b, and the total surface area is set to approximately 1.076 cm ² . Therefore, as shown in FIG. 8, the air 26 introduced into the primary oil mist
Since the speed is greatly reduced to 2 m / sec, the oil mist 24 in the air 26 is captured and separated when passing through the perforations. Thus, the air 26a that has exited the primary oil mist filter 18 does not contain the oil mist 24. This air 26a passes through the defining passage 15 and passes through the secondary flow velocity reducing chamber 1
2 is introduced.

The oil mist 24 separated in the primary oil mist filter 18 is agglomerated and oil (recovered oil)
It falls as 34 and is stored in the primary oil storage unit 7. The air 26a that has passed through the primary oil mist filter 18 passes through the defining passage 15 having a cross-sectional area of approximately 300 cm ² at a flow velocity of approximately 2.61 m / sec, and the secondary oil mist filter in the secondary flow velocity reduction chamber 12 is formed. The oil mist 24 passing through the inside 19 and remaining in the air 26a is reliably removed. The secondary flow velocity reduction chamber 12 has an average cross-sectional area of about 3
Because of 12 cm ² , the flow rate of the air 26a is approximately 2.61 m
/ Sec to approximately 2.51 m / sec, passes through the secondary oil mist filter 19 in a decelerated state, and becomes air 26b. This air 26b contains oil mist 24
Is hardly contained, and there is no problem even if it is discharged from the discharge port 17 of the exhaust part 14 to the atmosphere side.

Due to the action of removing the oil mist 24, the oil 34 gradually accumulates in the primary oil reservoir 7 as described above. For this reason, it is necessary to control the opening and closing of the primary solenoid valve 4 and the secondary solenoid valve 5 in order to discharge the oil component 34, and accordingly, it becomes necessary to adjust the direction of the switching valve 6. Therefore, first, the operation of the oil mist collecting device 1 until the oil component 34 is stored in the primary oil storage unit 7 will be described with reference to FIG. In this phase, the primary solenoid valve 4 is closed, the secondary solenoid valve 5 is opened, the switching direction of the switching valve 6 is A-C open, B
-C is closed. Therefore, the secondary oil storage unit 8 communicates with the atmosphere side and has an atmospheric pressure. However, as shown in the figure, since the oil component 34 does not accumulate in the secondary oil reservoir 8, even if the secondary solenoid valve 5 is in the open state, the oil component 34 flows toward the oil pan (not shown). Does not occur.

Next, with reference to FIG. 9, the operation of sending the oil 34 stored in the primary oil storage 7 to the secondary oil storage 8 will be described. In this phase, as shown, the primary solenoid valve 4 is opened, and the secondary solenoid valve 5 is closed. Also, the switching valve 6
Indicates that AC is closed and BC is opened. By opening B-C of the switching valve 6, the pressure in the secondary oil storage unit 8 becomes the same pressure as the primary oil storage unit 7 side. For this reason, the oil component 34 that has passed through the primary solenoid valve 4 opened from the primary oil storage unit 7 via the inlet-side pipe 28 is sent to the secondary oil storage unit 8 side by the discharge-side pipe 29 by gravity and stored therein. You. As described above, the oil component 34 in the primary oil storage section 7 decreases and eventually disappears.

Next, with reference to FIG. 10, the operation of discharging the oil 34 stored in the secondary oil storage 8 will be described. In this phase, the primary solenoid valve 4
Is closed, and the secondary solenoid valve 5 is opened. Further, the switching valve 6 is opened A-C and closed B-C.
When the secondary solenoid valve 5 is open, A-
Since the atmospheric pressure acts in the secondary oil storage unit 8 by opening C, the oil 34 in the secondary oil storage unit 8 flows from the discharge pipe 32 to the atmosphere through the inlet pipe 31 and the secondary solenoid valve 5. Is discharged. As described above, the primary oil reservoir 7 and the secondary oil reservoir 8 have no oil.

The operations shown in FIGS. 8 to 10 are performed during a series of operations in which the air 26 is introduced and discharged into the oil mist collecting device 1. The operations are repeatedly repeated at a predetermined timing, and are continuously performed. Done. As shown in FIG. 11, the automatic control timing of each unit of the apparatus is such that the leftmost column in the figure shows the processing state of the oil mist 24 and the oil component 34 in the oil mist collector 1, and the next column shows the automatic control timing. The operation of the device is shown, and the next column displays the automatic switching cycle of the controlled object.

In FIG. 11, (a) in the top row is
This shows a state in which the air 26 is sucked into the oil mist collection device 1, and (b) in the next line shows a state in which the oil flows into the primary oil storage 7. That is, the oil is continuously flowing. (C) of the next line shows the outflow state of the oil component (recovered oil) 34 from the primary oil storage unit 7. In this example, the outflow time is 3 to 5 minutes, and the cycle timing is 10 to 3 minutes.
0 minutes.

(D) of the next line shows an opening cycle of the primary solenoid valve 4, and the opening time is 3 to 5 hours.
And the cycle timing is 10 to 30. The closing of (e) in the next line is performed during the cycle timing of the primary solenoid valve 4, the closing time is 10 to 30 minutes, and the cycle timing is 3 minutes.
~ 5 minutes. Next, the opening of the secondary solenoid valve 5 shown in FIG. 6F corresponds to the closing of the primary solenoid valve 4, and the opening time is 10 to 30 minutes.
The cycle timing is 3 to 5 minutes. Further, the closing time of the secondary solenoid valve 5 shown in FIG. 9G is 3 to 5 minutes in synchronization with the cycle timing when the secondary solenoid valve 5 is opened, and the cycle timing is 10 to 30 minutes.

The opening of the switching valve 6 along the line A-C and the closing of the line B-C are performed for 10 to 30 minutes in accordance with the opening time of the secondary solenoid valve 5, as shown in FIG. Therefore, the cycle timing is 3 to 5 minutes. Further, as shown in FIG.
On the contrary, BC release is performed for 3 to 5 minutes, and the cycle timing is 10 to 30 minutes.

From the above, as shown in FIG. 9 (j), the inflow of the oil component 34 into the secondary oil storage portion 8 is performed for 3 to 5 minutes in response to the closing operation of the secondary solenoid valve 5, The cycle timing is set to 1 in response to the opening of the secondary solenoid valve 5 as shown in FIG.
Performed for 0-30 minutes. The operation and operation based on the automatic control timing described above are continuously performed while the air 26 passes through the oil mist collection device 1. The above-described operation times and cycle timings can be appropriately set / changed in accordance with the state of generation of the oil mist 24 from the machine tool 36 in which the oil mist collecting device 1 is disposed.

As described above, according to the configuration of the first embodiment, the oil mist 24 is
The oil is caught and agglomerated by the secondary oil mist filter 19 and discharged from the oil reservoirs 7 and 8 as an oil component 34. The discharged oil component 34 is collected by a collecting oil pan (not shown) connected to each oil mist collecting device 1. The collected oil 34 is fed to a machine tool 36
Each oil is collected in the oil tank 54 by passing the oil 34 through an existing oil cleaning device (FIG. 1).
4, see FIG. 15) and can be recycled.

Second Embodiment FIG. 12 is a sectional view showing a mechanical configuration of an oil mist collecting device according to a second embodiment of the present invention. The difference between the configuration of the oil mist collecting device 1a of this embodiment and that of the above-described first embodiment is that a blower (blower means) 35 is used.
This is the point that is provided. Except for this, it is substantially the same as the oil mist collecting device 1 (FIG. 1) of the first embodiment. In this example, the blower 35 is disposed near the outlet 17 of the exhaust part 14 as shown in FIG.

In the above-described first embodiment, the oil mist collecting device 1 is provided with a centralized blower 40 as shown in FIG.
In the second embodiment, the blower 35 is attached to each oil mist collecting device 1a, while the air 26 is sucked by the suction force of the air. Then, the oil mist 24 emitted from the machine tool 36
The suction force of the blower 35 can be changed according to the amount of oil mist generated, and the most efficient oil mist removal is performed.

As described above, according to the configuration of the second embodiment, substantially the same effects as described in the first embodiment can be obtained. In addition, in the second embodiment, the duct 38
And the need for the focusing duct 39, the centralized blower 40, etc., can significantly reduce the overall cost and simplify installation /
Installation can be changed.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the scope of the present invention. Are also included in the scope of the present invention. For example, the flow velocity and cross-sectional area of each part of the device can be changed as needed. In the above-described embodiment, a known nickel metal filter is used as the oil mist filter. However, the present invention is not limited to this, and another porous filter can be used.
Further, the number of the nickel metal filters is set to two, the primary oil mist filter 18 is formed in a frame shape, and the secondary oil mist filter 19 is formed as a single plate-shaped filter. Different ones may be used. The above-mentioned automatic control timing in the automatic control timing is merely an example, and is set as appropriate in accordance with the amount of generated oil mist. Also,
In the above embodiment, the oil mist collecting device 1 and the outlet 17 of the oil mist collecting device 1a communicate with the atmosphere through the duct 38 communicating with the focusing duct 39.
In particular, in the case of the oil mist collecting device 1a, the focusing duct 3
9 without using the oil mist collecting device 1a
May be opened to the atmosphere side. Further, if an electric dust collecting unit for catching fine particles in the gas by electric control is provided on the rear side of the exhaust part, the oil mist can be more reliably removed, and the dust floating in the air can be removed. And welding fumes can be reliably removed. In this case, when viewed from the side of the electric dust collection unit, the durability of the dust collection unit can be improved.

[0053]

As described above, according to the oil mist collecting device of the present invention, it can be installed for each machine tool arranged in the factory, and the oil mist generated from each machine tool can be almost completely removed. As well as the oil removed
Each machine tool can be discharged to the collection tank and collected.
Can be used again for circulation. Therefore, even if the exhaust part for discharging gas is connected to the duct, the oil is hardly stored in the duct, and the time required for processing the oil in the duct can be greatly reduced. Further, if a gas blown by the oil mist is sucked into the suction unit and the gas mist is removed from the exhaust unit, the air blowing unit may be added to each of the collecting devices according to the present invention. The suction force corresponding to the amount of oil mist generated from each machine tool can be arbitrarily set, and therefore, the oil mist can be efficiently and reliably removed. Further, if the opening / closing timing of the opening / closing means and the switching valve can be automatically controlled by the automatic control timing, the removal, recovery, and circulation of the oil mist can be performed more stably. Further, if an electric dust collecting unit for catching fine particles in the gas by electric control is provided on the rear side of the exhaust part, the oil mist can be more reliably removed, and the dust floating in the air can be removed. And welding fumes can be reliably removed. In this case, when viewed from the side of the electric dust collection unit, the durability of the dust collection unit can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a mechanical configuration of an oil mist collecting device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a building for illustrating an arrangement state of the oil mist collecting device.

FIG. 3 is a plan view of a nickel metal filter used as an oil mist filter in the oil mist collecting device.

FIG. 4 is a partially enlarged sectional view of the nickel metal filter of FIG. 3;

FIG. 5 is a schematic diagram for explaining a function of a nickel metal filter.

FIG. 6 is a characteristic diagram for comparing pressure loss of another type of oil mist filter and that of a nickel metal filter.

FIG. 7 is a view for explaining the operation of the embodiment, and is a cross-sectional view for showing a cross-sectional area of each part of the oil mist collecting device and a flow velocity of air passing therethrough.

FIG. 8 is a view for explaining the operation of the embodiment, and is a cross-sectional view for explaining actions such as removal, recovery, and circulation use of oil mist.

FIG. 9 is a view for explaining the operation of the embodiment, and is a cross-sectional view for explaining actions such as removal, recovery, and circulation use of oil mist.

FIG. 10 is a view for explaining the operation of the embodiment, and is a cross-sectional view for explaining actions such as removal, recovery, and circulation use of oil mist.

FIG. 11 is a diagram showing automatic control timing of the oil mist collecting device.

FIG. 12 is a sectional view showing a mechanical configuration of an oil mist collecting device according to a second embodiment of the present invention.

FIG. 13 is a cross-sectional view of a building for explaining effects such as conventional removal, recovery, and circulation use of oil mist.

FIG. 14 is a partial front view for explaining supply of a cutting oil of a machine tool and its collection and circulation.

FIG. 15 is a partial side view of FIG. 14;

FIG. 16 is a schematic diagram for explaining an outline of an oil mist removing operation in a known electric dust collector.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 oil mist collecting device 1 a oil mist collecting device 2 device main body 3 oil mist filter portion (oil mist capturing portion) 4 primary solenoid valve 5 secondary solenoid valve 6 switching valve (opening / closing switching means) 7 primary oil storing portion 8 2 Primary oil storage unit 18 Primary oil mist filter (hollow container-shaped porous filter) 18a Side nickel metal filter 18b Bottom nickel metal filter 19 Secondary oil mist filter (plate-shaped porous auxiliary filter) 20 Nickel metal filter 26 Air ( Gas) 35 blower 36 machine tool 39 focusing duct 40 centralized blower

────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI B01D 50/00 501 B01D 50/00 501A 501Q 502 502A (56) References JP-A-6-114223 (JP, A) 5-76509 (JP, U) Japanese Utility Model Showa 48-16468 (JP, U) Japanese Utility Model Application Hei 4-83552 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 46/00 -46/46 B01D 50/00

Claims (16)

(57) [Claims] 1. An intake unit for sucking a gas contaminated with oil mist, an oil mist catching unit for catching the oil mist from the gas sucked from the intake unit with a porous filter, and an oil mist catching unit Oil mist collecting device, comprising: an oil storage unit for storing the oil mist aggregates captured by the unit as collected oil; and an exhaust unit for discharging the gas from which the oil mist has been removed. Wherein the oil storage section is disposed on an upstream side to receive and temporarily store the recovered oil, and the primary oil storage section is disposed on a downstream side and the recovery oil discharged from the primary oil storage section is provided. A secondary oil storage unit that receives and stores oil, and between the primary oil storage unit and the secondary oil storage unit,
A first opening / closing means for putting the primary oil storage section and the secondary oil storage section in a communication state or a cutoff state is inserted,
And, between the secondary oil storage unit and the atmosphere outside the device, the secondary oil storage unit and the atmosphere outside the device are set in a communication state or a cutoff state, and are stored in the secondary oil storage unit. An oil mist collecting device, wherein a second opening / closing means for discharging the collected oil to the outside of the device or preventing the collected oil from being discharged is interposed. 2. An air blowing means for sucking the gas contaminated with oil mist into the suction unit and discharging the gas from which the oil mist has been removed to the exhaust unit. The oil mist collecting device according to claim 1, wherein 3. The filter according to claim 1, wherein the oil mist catching unit has a hollow container-shaped porous filter provided with an opening for introducing the gas contaminated with the oil mist. Oil mist collecting device. 4. The oil mist catching section, wherein the hollow container-shaped porous filter is disposed with the opening for introducing the gas contaminated with oil mist facing upward. The oil mist collecting device according to claim 3, wherein: 5. The oil mist catching unit has a plate-shaped porous auxiliary filter in addition to the hollow container-shaped porous filter, and the porous auxiliary filter is disposed downstream of the porous filter. The oil mist collecting device according to claim 3, wherein the oil mist collecting device is provided. 6. The oil mist trapping device according to claim 1, wherein the oil storage part is provided below the oil mist trapping part. 7. When the oil mist captured by the porous filter agglomerates into recovered oil, the recovered oil drops or flows down after passing through the porous filter, and is collected by the oil reservoir. The oil mist collecting device according to claim 6, wherein the device is configured to be received and stored. 8. When the oil mist captured by the porous body auxiliary filter aggregates and becomes collected oil, the collected oil also falls or flows down from the porous body auxiliary filter and is received by the oil storage section. 7. The oil mist collecting device according to claim 6, wherein the oil mist is collected and stored. 9. The oil mist collecting device according to claim 1, wherein the porous filter or the porous auxiliary filter is detachably mounted. 10. An average value of a flow velocity distribution of a gas passing through each part of the porous filter in the oil mist capturing part, where a flow velocity of the gas to be sucked in a tip end opening of the intake part is 1. 5. The oil mist collecting device according to claim 1, wherein the flow rate is set to be 1/10 to 1/100. 11. The total surface area of the porous filter in the oil mist catching section is set to be 10 to 100 times assuming that the tip opening cross-sectional area of the suction section is 1. 5. The oil mist collecting device according to 3 or 4. 12. An outside air between the outside air and the primary oil storage section, or between the outside air outside the apparatus and the primary oil storage section, which is interposed between the outside of the apparatus and the primary oil storage section and the secondary oil storage section. The oil mist collecting device according to claim 1, further comprising an opening / closing switching means for selectively setting a communication state or a cutoff state between the side and the secondary oil storage unit. 13. The apparatus according to claim 12, wherein said first opening / closing means, said second opening / closing means, and said opening / closing switching means are automatically controlled in association with each other.
An oil mist collecting device as described in the above. 14. The first opening / closing means, the second opening / closing means, and the opening / closing switching means are automatically associated with each other at a predetermined opening / closing timing corresponding to the amount of recovered oil stored in the primary oil storage section. 14. The oil mist collecting device according to claim 13, wherein the device is controlled. 15. The communication port of the open / close switching means to the atmosphere outside the device is denoted by A, the communication port to the primary oil storage section is denoted by B, and the communication port to the secondary oil storage section is denoted by C. In this case, the opening / closing timing is such that the first opening / closing means is closed, the second opening / closing means is opened, and the opening / closing switching means A-
A control timing of a predetermined time including C open, BC close, and BA close, and the first open / close means open, the second open / close means close, the open / close switching means BC open, AC close 15. The oil mist collecting device according to claim 13, wherein a control timing for a predetermined time period consisting of AB closing is automatically controlled so as to be sequentially repeated. 16. An electric dust collecting unit for catching fine particles in a gas by an electric control is provided at a rear stage of the exhaust unit for discharging the gas. 2. The oil mist collecting device according to 1.