JP2009066531A - Demister device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a demister device of simple structure collecting oil mist generated from cutting fluid in machining. <P>SOLUTION: A demister material 7 formed by roll-likely winding nonwoven fabric 8 consisting of ultra-fine fibers having an electric stone function around a core material 10 with mesh-like reinforcing materials superposed, is loosely pressed in and mounted in a cylindrical member 1 provided with a partition plate 2 with one end 1a of an inlet side opened and a lot of small holes 3 formed on the other end 1b, allowing insertion of a piping hose into both ends, and is allowed to be set in a suction pipe line of a mist collection device in an in-line type. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a demister apparatus used for collecting oil mist generated from a cutting fluid or a cleaning fluid used when drilling or polishing a workpiece made of a metal material or a synthetic resin material in a processing chamber. .

  In machine tools such as machining centers and CNC lathes, machines such as drilling, threading and polishing of workpieces made of metal materials and synthetic resin materials with cutting tools that automatically operate based on a program in an almost sealed machining chamber Processing is performed, but oil mist generated from the cutting fluid during processing is collected by a mist collecting device attached to the processing chamber. Oil mist is roughly classified into two types: mineral oil mist and water-soluble oil mist containing water.

  As the mist collecting device, various structures such as a filter method, a demister method, a collision plate method, and an electric dust collection method are known. For example, Patent Document 1 discloses a mist collecting device for a machine tool according to the present applicant. The mist collecting device includes a collecting unit provided in a case where a rotary filter using a nonwoven fabric having a mesh of 0.3 to 3 μm is disposed in a case, and the filter is rotated by a motor, and an intake of the collecting unit Root blower with negative pressure on the side, air containing mist in the processing chamber is sucked into the collection unit by operating the roots blower, and the mist in the air is removed by a rotary filter. The air passing through the filter is provided to be discharged to the outside.

Patent Document 1 discloses that a demister device is installed on the suction pipe side of the mist collecting device. The demister device has a function of growing fine mist into large particles, and is used to prevent clogging of the rotary filter of the mist collecting device. In any case, if the mist is not processed efficiently, it can be said that it is difficult for the mist to diffuse into the processing room or factory to make the work environment comfortable and the worker's health safe. Like.
JP 2007-21321 A

  An object of the present invention is to provide a demister device having a simple structure for collecting oil mist generated from a cutting fluid during machining.

  In order to achieve the above object, the invention described in claim 1 is provided with a partition plate in which one end on the inlet side is opened and many small holes are formed on the other end on the outlet side, and a piping hose can be inserted at both ends. It is characterized in that a demister material wound in a roll shape around a core material in a state where a nonwoven fabric made of ultra-fine fibers having an electric stone function is overlapped with a mesh-like reinforcing material is mounted in the cylindrical member.

  In order to achieve the same object, the invention described in claim 2 is provided with a partition plate in which one end on the inlet side is opened and many small holes are formed on the other end on the outlet side, and a piping hose is inserted at both ends. A plurality of filter brushes, in which a large number of wire brushes of a predetermined length are radially planted on the outer periphery of a short shaft portion, and a non-woven fabric made of superfine fibers having an electric stone function are formed in a mesh. The demister material wound in a roll shape around the core material in a state where the reinforcing members are stacked is attached in order with the brush facing the partition plate.

  In order to achieve the same object, the invention described in claim 3 is the demister device according to claim 1 or 2, wherein flanges having mounting holes are integrally provided at both ends of the cylindrical member. It is characterized by being.

(Invention of Claim 1)
Since this demister device employs a demister material using a nonwoven fabric having a tourmaline function, it is possible to recover about 99% of the mist that is inhaled and there is little pressure loss. In addition, it can be installed in an in-line manner in the suction piping path of the mist collecting device, and maintenance work such as inspection and cleaning can be easily performed.

(Invention of Claim 2)
Since this demister device has a structure in which a demister material using a nonwoven fabric having a tourmaline function and a brush for a filter are combined, it has a function of growing the sucked mist into larger particles, and has excellent recovery performance and low pressure loss. .

(Invention of Claim 2)
Since this demister device is provided with a flange, it is suitable for flange-type piping.

  The best mode of the present invention will be described below with reference to the drawings. 1 is an explanatory view of the demister device of the first embodiment, FIG. 2 is an enlarged view of a part of FIG. 1, FIG. 3 is an explanatory view showing a state in which a mesh-like reinforcing material is superimposed on a nonwoven fabric, and FIG. FIG. 5 is a perspective view of a demister device according to a third embodiment, and FIG. 6 is a perspective view of a filter brush.

(Example 1)
A demister device A according to a first embodiment of the present invention is shown in FIG. The demister device A is structured such that the demister material 7 is loosely press-fitted into the cylindrical member 1 and attached.

  As shown in FIG. 1, the cylindrical member 1 has a diameter of about 5 to 6 inches and a length of about 200 mm, and opens one end 1a on the inlet side and forms many small holes 3 on the other end 1b on the outlet side. The partition wall plate 2 is provided integrally. A pipe hose (not shown) can be inserted into one end 1 a and the other end 1 b of the cylindrical member 1.

  The demister material 7 is rolled into a core material 10 having a diameter of 10 mm by laminating a plastic mesh-like reinforcing material 9 having a mesh size of 1 mm on a known nonwoven fabric 8 made of ultrafine fibers having a stone function of about 1 mm in thickness and 200 mm in width. It is made into the form wound by appropriate force (FIG. 2, FIG. 3).

  Thus, the demister device A of the first embodiment is configured by loosely press-fitting the demister material 7 into the cylindrical member 1.

  The degree of press-fitting of the demister material 7 greatly affects the mist collecting performance, but the vacuum resistance is preferably -5 to 8 kPa and the wind speed is preferably about 3 to 4 m / sec. Moreover, the demister material 7 shall be press-fitted to such an extent that the inner end portion is in contact with the partition plate 2 of the cylindrical member 1 or a slight gap is formed.

Embodiment 2
A demister device B according to a second embodiment of the present invention is shown in FIG. In the demister device B, flanges 14 having mounting holes 15 are integrally provided at both ends of the cylindrical member 11. Since other configurations are the same as the configuration of the demister device A of the first embodiment, the same reference numerals are given to the drawings and description thereof is omitted.

(Embodiment 3)
A demister device C according to a third embodiment of the present invention is shown in FIG. The demister device C has a structure in which a plurality of filter brushes 30 and a demister material 7 are sequentially mounted inside a cylindrical member 21 with the brushes 30 facing the partition plate 22. Since other configurations are the same as the configuration of the demister device A of the first embodiment, the same reference numerals are given to the drawings and description thereof is omitted.

  As shown in FIG. 6, the filter brush 30 is configured such that a large number of wire brushes 32 having a predetermined length are radially arranged on the outer periphery of the short shaft portion 31. The outer diameter of the brush 30 is adjusted to the inner diameter of the cylindrical member 21.

  Thus, the demister device C of the third embodiment is configured by sequentially inserting two to three filter brushes 30 and the demister material 7 into the cylindrical member 21 with the brush 30 facing the partition plate 22 side. The

  In addition, about the length dimension of the cylindrical member 21, it is provided long as much as the filter brush 30 is inserted (about 60 mm). In addition, the demister device C can also be configured such that flanges are integrally provided at both ends of the cylindrical member, similarly to the demister device B of the second embodiment.

  The demister device according to the present invention can be used alone or in combination with a mist collecting device. Then, the case where the mist collection system which combined the demister apparatus which concerns on this invention with the well-known mist collection apparatus is applied to the processing chamber of a machining center is demonstrated.

  In FIG. 7, the machining center 40 is configured such that a cutting tool 45 such as a drill is automatically mounted on a spindle 43 that is rotatably supported at the center of a column 42 that is provided on a bed 41 so as to be movable in the front-rear direction. Has been. A guide 47 disposed on one end of the bed 41 is mounted with a carriage 47 provided with a four-sided scale 48 for fixing and holding the workpiece w. The carriage 47 is moved in the front-rear direction by a driving means (not shown). It is provided so that it can move freely.

  Reference numeral 50 denotes a processing chamber provided with an openable / closable door 51. The processing chamber 50 is provided with an internal space s that accommodates a carriage 47 and the like that are set at predetermined positions when the bed 41, the column 42, and the workpiece w are processed. Reference numeral 52 denotes a suction hood for sucking mist provided at the top of the processing chamber 50.

  The mist collecting device 60 includes a collecting unit 61 provided with a rotary filter 64 using a nonwoven fabric having a mesh of 0.3 μm arranged in a case 62 and rotated by the motor 65, and a collecting unit 61. Roots type blower 66 which makes the suction side of the negative pressure state a negative pressure state.

  The suction port 63 of the mist collecting device 60 and the suction hood 52 are connected by a suction pipe 53. The suction pipe 53 is branched into two in the middle of the pipeline, and the demister device A of the first embodiment is interposed in the branch portion 53a, and the demister device C of the third embodiment is interposed in the branch portion 53b. .

  As described above, the air containing the mist in the processing chamber 50 through the suction hood 52 through the two demister devices A and C according to the present invention through the operation of the roots type blower 66 of the mist collecting device 60 and into the collecting unit 61. A mist collecting system is constructed in which the mist in the air is removed by the rotary filter 64 and the dry air that has passed through the filter is discharged to the outside.

  When the air volume of the mist collecting device 60 is large as in this embodiment, it is preferable to use a plurality of demister devices in parallel.

(Experiment 1)
Experiments were conducted under the following conditions for the collection performance of the demister device A of the first embodiment and the demister device C of the third embodiment according to the present invention. The result is shown in the graph of FIG.
Demister material: Diameter 150mm, length 220mm
Amount of water-soluble oil mist generated in the machining chamber of the machining center: 0.5 to 9.62 mg / m ³
Suction air volume: About 2.2m ³ / min

As a result of the experiment, in the demister device A according to the first embodiment, the exhaust oil mist concentration is changed by an increase in the amount of cutting oil on the processing machine side for a few minutes at a frequency of once every 30 hours. Excellent performance of 0.05 to 0.04 mg / m ³ was confirmed. In addition, in the demister apparatus C of the third embodiment, the exhaust side oil mist concentration slightly changes for several minutes at a frequency of once every 30 hours, but on average 0.04 to 0.03 mg / m ^3. Excellent performance was confirmed.

(Experiment 2)
Experiment 1 regarding the collection performance relating to the mist collection system in which the demister apparatus A and the mist collection apparatus 60 of the first embodiment according to the present invention and the demister apparatus C and the mist collection apparatus 60 of the third embodiment are combined. The experiment was performed under the same conditions as those described above. The result is shown in the graph of FIG.

As a result of the experiment, in any mist collection system using the demister device A of the first embodiment and the demister device C of the third embodiment, the exhaust side oil mist concentration has an excellent performance of 0.01 mg / m ^3. Obtained. The pressure loss showed a stable value of about -8 kPa after 700 hours, and a good result of -9.8 kPa was obtained even after about 2 months.

  As described above, since this demister device employs a demister material using a nonwoven fabric having an electric stone function, it is possible to recover about 99% of the inhaled mist and there is little pressure loss. There are advantages.

Explanatory drawing of the demister apparatus of 1st Embodiment 1 is an enlarged view of a part of FIG. Explanatory drawing which shows the state which laminated | stacked the mesh reinforcement on the nonwoven fabric The perspective view of the demister apparatus of 2nd Embodiment The perspective view of the demister apparatus of 3rd Embodiment Perspective view of filter brush Explanatory drawing at the time of applying the mist collection system which combined the demister apparatus which concerns on this invention with the well-known mist collection apparatus to the processing chamber of a machining center The graph which shows the collection performance of the demister apparatus which concerns on this invention The graph which shows the collection performance in the system which combined the demister apparatus and mist collection apparatus which concern on this invention

Explanation of symbols

A ... Demister device 1 of the first embodiment ... Cylindrical member 2 ... Partition plate 3 ... Small hole 7 ... Demister material 8 ... Non-woven fabric 9 ... Reticulated reinforcing material 10 .. Core material B: Demister device 11 of the second embodiment ... Cylindrical member 14 ... Flange C ... Demister device 21 of the third embodiment ... Cylindrical member 22 ... Partition plate 30 ..Filter brush 32 ... Wire brush

Claims (3)

  An ultrafine fiber having a tourmaline function is provided in a cylindrical member in which one end on the inlet side is opened and a partition plate in which a plurality of small holes are formed on the other end on the outlet side and a pipe hose can be inserted at both ends. A demister device comprising a demister material wound in a roll shape around a core material in a state in which a non-woven fabric overlapped with a mesh-like reinforcing material.   A wire brush having a plurality of predetermined lengths is provided in a cylindrical member in which one end on the inlet side is opened and a partition plate in which a plurality of small holes are formed on the other end on the outlet side and a piping hose can be inserted at both ends. A plurality of filter brushes radially planted on the outer periphery of a short shaft part and a nonwoven fabric made of ultrafine fibers having a stone function were wound around a core material in a roll shape with a mesh-like reinforcing material overlapped A demister device, wherein the demister material is sequentially attached with the brush facing the partition plate.   The demister device according to claim 1 or 2, wherein flanges having attachment holes are integrally provided at both ends of the cylindrical member.

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