JP3312079B2 - 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 for collecting oil mist generated in a machine tool and floating in a gas.

[0002]

2. Description of the Related Art Conventionally, in a device for trapping fine suspended matter in a gas by a filter, a device for collecting the trapped material in the filter includes a suction device having a suction port formed on an upstream side in a gas passage direction of the filter. There is an apparatus that slides and moves relative to a surface to suck and collect a filter trap from a suction port (for example, see Japanese Utility Model Laid-Open No. 60-13223 and Japanese Utility Model Laid-Open No. 63-149216).

[0003]

However, in a case where the oil mist floating in the gas is to be captured and collected, in the above-described conventional configuration, when the captured oil of the filter is sucked and collected, the oil mist is captured by the filter together with the oil mist. Dust is sucked from the suction port together with the oil, so that the dust adheres and accumulates in the suction port and the suction path following the oil due to the stickiness of the oil, causing a clogging at an early stage. Further, since the oil collected by suction is mixed with dust, the oil must be disposed of or separately subjected to a regeneration treatment for separating the dust, and in any case, there is a problem of poor economic efficiency.

A first object of the present invention is to make it possible to suck and collect oil trapped in a filter without containing dust trapped in the filter. A second object of the present invention is to simplify the device configuration. A third object of the present invention is to improve the efficiency of oil suction and recovery. A third object of the present invention is to stabilize the oil suction and recovery operation. A fourth object of the present invention is to reduce the size of the suction device and reduce the required power.

Means for Solving the Problems [First characteristic configuration] A first characteristic configuration of the present invention is to provide a filter which is located in a gas passage and catches oil mist in a passing gas, and performs suction.
The force is applied from the downstream side of the gas passage direction in the filter.
An oil recovery unit configured to relatively move a suction device having a suction port formed therein in a contact state or a proximity state with respect to a downstream surface of the filter in a gas passing direction in a contact state or a proximity state, and to collect and collect captured oil of the filter from the suction port. It has been provided.

[Second feature configuration] A second feature configuration of the present invention specifies a preferred configuration in the implementation of the first feature configuration, and the suction device is moved in the direction of relative movement with respect to the filter. The filter is arranged so as to extend across the entire width of the filter in the orthogonal filter width direction.

[Third feature configuration] A third feature configuration of the present invention specifies a preferred configuration in the implementation of the second feature configuration, and the filter located in the gas passage path is collected by a filter collection unit. And a filter transfer means for transferring the new filter from the filter storage section to the gas passage path, and the suction device is provided in the middle of the filter collection path from the gas passage path to the filter collection section. It has been arranged.

[Fourth feature configuration] A fourth feature configuration of the present invention specifies a preferred configuration in the implementation of the third feature configuration. The band-shaped filter is wound in the middle of the filter collection path. The suction port is formed in a filter transfer guide to be hung, and the filter transfer guide is used as the suction device.

[Fifth feature configuration] A fifth feature configuration of the present invention specifies a preferred configuration in the implementation of the first, second, third or fourth feature configuration, and the downstream side of the filter in the gas passage direction. And a guide rolling element that is moved relative to the filter together with the suction device in a state of being in contact with the surface of the suction port in the relative movement direction.

[Sixth feature configuration] A sixth feature configuration of the present invention specifies a preferred configuration in the implementation of the first, second, third, fourth or fifth feature configuration. The oil outlet path is communicated with the suction device, and the suction air path connected to the suction device and the mouth of the suction port are connected to the suction device above the communication position of the oil outlet path.

[0010]

[Action]

[Operation of the first characteristic configuration] In the first characteristic configuration, the suction port is brought into contact with or close to the surface of the filter on the downstream side in the gas passage direction, so that the suction port contacts the suction device contact portion or the proximity portion of the filter. Is effectively applied from the downstream side in the gas passage direction of the filter, whereby the filter trapped oil in the contact portion or the proximity portion is passed through the filter downstream in the gas passage direction and is sucked into the suction port. In addition, by sucking the filter from the downstream side in the gas passage direction in this way, the filter functions as a separation screen for dust and liquid oil, thereby sucking purified oil from which dust has been removed into the suction port. Let it. Then, by moving the suction device relative to the filter in this suction mode, the trapped oil in each part of the filter is suctioned and collected.

According to the second feature configuration, the suction and recovery of the trapped oil over the entire width of the filter proceeds in the relative movement direction only by relatively moving the filter and the suction device in only one direction. be able to.

[Operation of the Third Characteristic Configuration] In the third characteristic configuration, when the filter capturing the oil mist is transferred from the gas passage to the filter collection unit, the transfer is used for the relative movement between the filter and the suction device. Then, the suction oil is collected and collected.

[Operation of the Fourth Characteristic Configuration] In the fourth characteristic configuration, a filter transport guide body around which a band-shaped filter is wound is used as the body configuration of the suction device. When passing through the winding portion of the transfer guide, the trapped oil is sucked into the suction port formed in the filter transfer guide.

[Effect of Fifth Characteristic Configuration] In the fifth characteristic configuration, the contact rolling member positioned in front of and behind the suction port is brought into contact with the filter surface so that the suction device and the filter surface are in contact or close proximity. Is maintained at an appropriate level to prevent the suction device from being excessively pressed against the filter and prevent the filter from being sucked and held by the suction device. Further, at this time, the relative movement between the guide rolling element itself and the filter is made smooth by the rolling of the guiding rolling element.

[Operation of the sixth characteristic configuration] In the sixth characteristic configuration, the suction air path connected to the suction device and the opening of the suction port are connected to the communicating position of the oil outlet path (that is, the suction unit bottom).
By communicating with the suction device at a higher position than the suction port, the suction gas introduced into the suction device together with oil from the suction port and reduced in speed is sucked from the suction device into the suction air passage. In the passage process, the suction oil is separated from the suction gas by specific gravity, and the separated oil is received at the bottom of the suction device and discharged from the oil discharge passage. That is, in the sixth characteristic configuration, the suction device that comes into contact with or comes close to the filter as a suction port forming member also functions as a separator between the suction oil and the suction gas.

[0016]

【The invention's effect】

[Effects of the first characteristic configuration] According to the first characteristic configuration, only the trapped oil can be suctioned and collected without sucking the dust trapped in the filter together with the oil mist. In addition, the oil can be efficiently and stably collected over a long period of time by avoiding the adhesion and deposition on the suction path subsequent thereto. In addition, since oil containing no dust can be collected, the collected oil can be reused without the need for a separate regeneration process for separating dust, thereby improving economic efficiency, saving resources and preventing pollution. Can also be effectively achieved.

[Effect of the second characteristic configuration] According to the second characteristic configuration, it is only necessary to relatively move the filter and the suction device in one direction only. Even if it is performed by moving the container, the moving configuration can be simplified.

[Effects of the third characteristic configuration] According to the third characteristic configuration, the filter transfer to the filter collection unit is used for the relative movement between the filter and the suction device, so that the exclusive movement for performing the relative movement is performed. There is no need to provide a separate means, and the device configuration can be simplified.

[Effect of the Fourth Characteristic Configuration] According to the fourth characteristic configuration, the apparatus configuration can be simplified by using the filter transport guide as the body configuration of the suction device. In the wrapping section, the contact state between the guide and the filter is stably maintained by the filter tension acting on the wrapping section, thereby improving the oil suction / recovery efficiency and stabilizing the oil suction / recovery operation. Can be achieved.

[Effect of Fifth Characteristic Configuration] According to the fifth characteristic configuration, the filter and the suction device can be smoothly moved relative to each other, whereby the oil suction recovery operation can be effectively stabilized. .

[Effect of Sixth Characteristic Configuration] According to the sixth characteristic configuration, a special separator is separately provided by causing the suction device, which is the formation member of the suction port, to also function as a separator between the suction oil and the suction gas. The device configuration can be simplified as compared with the case where the device is provided. Further, since the suction gas and the suction oil are separated immediately after suction from the suction port,
The pressure loss in the suction path can be reduced compared to a configuration in which the suction gas and oil are separated by a dedicated separator after transportation through a long pipe, thereby increasing the suction force at the suction port and improving oil suction recovery efficiency. It is possible to improve the size of the suction device, which is a suction source, or to reduce the required power of the suction device.

[0022]

1 and 2 show an oil filter for collecting oil mist of an automatic winding filter type. A first roll storage portion 2a is provided at one end of a frame 1 and a second roll is provided at the other end. An accommodating portion 2b is provided, and an air passage A is formed between the roll accommodating portions 2a and 2b so that the air to be subjected to oil mist removal passes in a predetermined direction.

The first roll storage 2a is a filter storage X for storing a new filter roll Ra (or a regeneration filter roll Ra), and the second roll storage 2b.
Is a filter collecting section Y for winding up and collecting the used filter F as a filter roll Rb. In the air passage path A, the filter F is pulled out from the first roll storage section 2a as the filter storage section X and the other filter is removed. A band-shaped filter F extending across the second roll storage section 2b as the collection section Y is stretched.

That is, the oil mist in the passing air is captured by the filter F extended in the air passing path A. Then, the filter F that has captured the oil mist is transferred to the second roll storage portion 2b and is wound and collected. With this filter collection, a new filter F is stored in the first roll storage portion 2a.
To the air passage A, and the filter F in the air passage A is updated.

Further, in the apparatus of the present embodiment, a filter regeneration process described below for sucking and collecting the trapped oil of the filter F in the middle of the filter recovery route for sending the filter F from the air passage route A to the second roll recovery portion 2b. The first
After the filter roll Ra in the roll storage section 2a is almost completely used, the second roll storage section 2b is used as the filter storage section X, and the first roll storage section 2a is used as the filter collection section Y. While updating and transferring the filter F in the reverse direction, the same oil mist capturing operation as described above is performed using the regeneration filter roll Rb in the second roll storage section 2b.

Further, also in the reverse updating transfer, the same filter regeneration processing as described above is performed in the middle of the filter collection path for sending the filter F from the air passage path A to the first roll storage section 2a. After the regeneration filter roll Rb in the second roll storage section 2b is almost completely used, the second roll storage section 2b is again moved from the first roll storage section 2a to the second roll storage section 2b.
The oil mist catching operation is carried out in a mode in which the filter is renewed and transferred to the roll storage portion 2b, and thereafter, the transfer direction is switched to repeat the oil mist catching operation until the life of the filter is reached.

3a and 3b are filter rolls Ra, R
This is a motor as filter transfer means for performing the transfer by rotating b.

4 and 5a and 5b guide the transfer of the filter with the band-shaped filter F wound thereon,
A guide roller and a guide drum serving as a filter transfer guide for holding the filter F in a meandering shape in the air passage path A;
b is mounted on the frame 1 so as to cover the entire width of the filter in the filter width direction orthogonal to the filter transfer direction, and the guide rollers 4 guide the filter transfer by rotation, while the guide rollers 4 rotate at both ends of the air passage path A. The guide drums 5a and 5b arranged in the sections are non-rotating guides that guide the filter transfer by bringing the wound filter F into sliding contact with their outer peripheral surfaces.

In the above-mentioned filter regeneration process, in the process of collecting and transferring the filter F from the air passage path A to the roll storage section 2b (or 2a) as the filter collecting section Y, the direction of the air passing direction in the collection and transfer filter F Oil recovery means is provided for sucking and recovering the captured oil of the filter F by bringing the suction device V into sliding contact with the downstream surface,
As a specific structure, as shown in FIGS. 3 and 4, the guide drums 5a and 5b are formed as container structures having both ends closed, and a filter wrapping portion (that is, a filter slide) in the guide drums 5a and 5b is used. A slit-shaped suction port S over the entire width of the band-shaped filter F at the contact portion),
The suction air path 7 from the suction device 6 is connected to each guide drum 5.
a, 5b, whereby each guide drum 5a, 5b
b is used as the suction device V.

That is, when the filter F to be collected and transferred from the air passage path A to the roll storage section 2b (or 2a) as the filter collection section Y passes through the winding section of the guide drum 5b (or 5a), the slit F The suction force of the suction port S is applied from the downstream side of the filter F in the air passage direction, whereby the filter trapped oil passes through the filter downstream in the air passage direction and is sucked into the suction port S.

8a and 8b show a state in which the guide drum 5b on the side of the second roll storage part 2b is made to function as a suction device V, and a state in which the guide drum 5a on the side of the first roll storage part 2a is made to function as a suction device V. In the operation of winding and collecting the filter F in the second roll storage portion 2b and using the second roll storage portion 2b as the filter recovery portion Y, the valve is guided to the second roll storage portion 2b. In the operation in which the drum 5b functions as a suction device V and the first roll storage portion 2a serves as a filter collection portion Y, and the filter F is wound and collected in the first roll storage portion 2a, the first roll storage portion 2a is used. The suction drum V is operated as a suction device V.

The suction air path 7 is connected to each of the guide drums 5a and 5b via a plurality of connecting pipes 9 which are distributed in the longitudinal direction of the guide drums 5a and 5b (ie, in the filter width direction). Thereby, the slit-shaped suction port S
The suction force of the filter F in the filter width direction is made uniform in the filter width direction by equalizing the suction force in the filter width direction.

An oil outlet passage 10 is connected to each of the guide drums 5a and 5b so as to communicate with the bottom of the drum. On the other hand, the suction air passage 7 and the mouth of the suction port S are connected to an oil passage. Each guide drum 5 is provided above the communication position of the lead-out path 10.
a, 5b, so that the air that has been introduced into the drum together with the oil through the mouth of the suction port S and reduced in speed passes through the inside of the drum from the inside of the drum to the suction air passage 7 during the passage. The suction oil is separated from the suction air by specific gravity, and the separated oil is received at the bottom of the drum in a form in which the bottom of the drum is used as an oil reservoir, and the received oil O is pumped to a predetermined oil recovery section via an oil outlet path 10. There is a configuration to send.

[Another Embodiment] Next, another embodiment will be described. (1) As shown in FIG. 5, the forming pipe 7p of the suction air passage 7 is inserted into the guide drums 5a and 5b as the suction device V so as to extend along the longitudinal direction of the drum. A structure in which a slit-shaped intake port 7s extending in the longitudinal direction of the drum may be formed above the pipe 7p.

That is, by arranging the pipe 7p for forming the suction air passage 7 inside the guide drums 5a and 5b, the structure around the guide drum can be simplified and made compact.
By forming the slit-shaped suction port 7 s extending in the longitudinal direction of the drum, the suction force of the slit-shaped suction port S in the filter width direction is equalized.
s and the mouth of the suction port S is communicated with the guide drums 5a and 5b at a position higher than the communication position of the oil outlet passage 10, so that the guide drums 5a and 5b are separated from the suction oil separator in the same manner as in the previous embodiment. There is also a configuration to function as

(2) As shown in FIG. 6, slit-shaped suction ports S are formed in the guide drums 5a and 5b as the suction devices V in a two-row state or a three-row or more plural-row state.
Oil remaining without being sucked in by the first row of slit-shaped suction ports S may be suctioned by the second and subsequent slit-shaped suction ports S to improve the oil suction recovery efficiency.
As shown in FIG. 7, the slit-shaped suction ports S are formed in a two-row state or a plurality of three-row or more rows by forming a dashed line, thereby ensuring both strength assurance and improvement in oil suction / recovery efficiency. You may. The shape of the suction port S is not limited to the slit shape, and various other shapes such as a porous shape can be adopted.

(3) The gas to be subjected to oil mist removal is not limited to air, and any source of oil mist to be collected and collected may be used.

(4) In the above embodiment, the filter F
Although the suction device V is configured using the filter transfer guides 5a and 5b around which the filter is wound, the suction device V may be configured with a different body configuration from the filter transfer guide. When the suction port S is formed in the filter transfer guide to form the suction device V, the specific structure of the filter transfer guide may be any.

(5) The suction device V may be of a type in which the suction device V is relatively moved in a state of being close to the surface of the filter F on the downstream side in the gas passage direction. Although the configuration in which the device V is relatively moved with respect to the filter F is employed, the configuration in which the filter F is fixed and the suction device V is moved may be employed.

(6) The filter transfer means is not limited to the winding type as in the above-described embodiment.
A type in which the plate-shaped filter F is slid and transferred may be used. Further, the filter storage unit X and the filter collection unit Y
The filter storage / recovery mode in each of the above is not limited to the roll type, and various modes can be adopted.

(7) As shown in FIG. 8, the guide rolling element 11 that moves relative to the filter F together with the suction device V while being in contact with the surface of the filter F on the downstream side in the gas passage direction is moved relative to the guide F. A configuration in which the suction port S is disposed before and after the suction port S in the direction may be adopted. Note that the configuration shown in FIG. 8 can be adopted in any of a type in which the suction device V is fixedly provided to move the filter F, and a type in which the suction device V is moved with respect to the fixed filter F.

(8) It is also possible to adopt a structure in which a rotary member for transferring the filter F by driving and rotating with the filter F wound around the filter F is provided with a suction port S and a suction device V. At this time, the rotating body may have a polygonal structure so that the oil-impregnated filter F can be transported without slippage.

(9) In the gas passage A, a configuration in which a plurality of suction devices V are juxtaposed in the filter transfer direction may be adopted.

(10) After suction and collection of the trapped oil, the filter F may be backwashed to remove the trapped dust from the filter F.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a side view of the apparatus .

FIG. 2 is a front view of the apparatus.

FIG. 3 is a perspective view of a main part.

FIG. 4 is an enlarged sectional view of a main part .

FIG. 5 is an enlarged sectional view showing another embodiment.

FIG. 6 is a perspective view showing another embodiment.

FIG. 7 is a perspective view showing another embodiment.

FIG. 8 is an enlarged sectional view showing another embodiment.

[Explanation of symbols]

 Reference Signs List A Gas passage F Filter S Suction port V Suction unit Y Filter collection unit X Filter storage unit 3a, 3b Filter transfer means 5a, 5b Filter transfer guide 11 Guide rolling element 10 Oil outlet 6 Suction device 7 Suction air passage

Continuation of the front page (56) References JP-A-49-86954 (JP, A) JP-A-62-30520 (JP, A) JP-A-62-79516 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B01D 46/00-46/54

Claims (6)

(57) [Claims] 1. A filter (F) that is located in a gas passage path (A) and captures oil mist in passing gas is provided, and a suction force is applied to the filter on the downstream side in the gas passage direction in the filter (F).
The suction device (V) formed with the suction port (S) to be actuated from the filter (F) is moved relative to the surface of the filter (F) on the downstream side in the gas passage direction in a contact state or a proximity state, so that the filter (F) An oil mist collecting device provided with oil collecting means for sucking and collecting trapped oil from the suction port ( S ). 2. The filter (F) according to claim 1, wherein the suction device (V) is arranged so as to extend over the entire width of the filter (F) in a filter width direction orthogonal to a direction of relative movement with the filter (F). Oil mist collection device. 3. The filter (F) located in the gas passage (A) is transferred to a filter collection unit (Y), and a new filter (F) is transferred from the filter storage unit (X). Filter transfer means (3a) and (3b) for transferring to the gas passage path (A) are provided, and the filter collection section (Y) is provided from the gas passage path (A).
The oil mist collecting device according to claim 2, wherein the suction device (V) is arranged in the middle of a filter collection path to the filter. 4. The suction port (S) is formed in the filter transfer guides (5a) and (5b) for winding the band-shaped filter (F) in the middle of the filter collection path, and the filter transfer guide is provided. The oil mist collecting device according to claim 3, wherein the bodies (5a) and (5b) are the suction devices (V). 5. The suction device (V) in a state where the suction device (V) is in contact with a surface of the filter (F) on the downstream side in the gas passage direction.
5. The oil mist trap according to claim 1, wherein a guide rolling element (11) that moves relative to the filter (F) is disposed before and after the suction port (S) in the direction of relative movement. Collector. 6. An oil outlet path (10) communicates with the bottom of the suction device (V), and a suction air path (7) connected to a suction device (6) and a suction port (S). The oil mist collecting device according to claim 1, 2, 3, 4, or 5, wherein an opening is connected to the suction device (V) at a position higher than a communication position of the oil outlet passage (10).