JP2016097318A - Mist and dust capturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a capturing efficiency for mist and dust particles in a capturing apparatus for mist and dust particles, and to reduce the manufacturing cost by simplifying a structure of the capturing apparatus for mist and dust particles.SOLUTION: Bent air streams passing through a peripheral opening 38b from center openings 36a, 37a and through the center opening 37a from the peripheral opening 38b are formed in an intermediate chamber tank 22 by first bulkhead plates 36, 37 and a second bulkhead plate 38. Air sucked out of the air suction port 21b of an introduction chamber tank 21 into a tank 20 strikes on a wide region in the surface of a rotary brush 33. Therefore, a strong turning effect acts on air by the rotary brush 33, so that a capturing efficiency of mist and dust particles improves. A rotary shaft 30 is rotated under the pressure of air sucked out of the air suction port 21b and that of injected water injected out of an injection nozzle 25. A separate installation of an electric motor as driving means for the rotary shaft 30 is dispensed with to enable a simplification in the structure of an apparatus 10 and a reduction in the manufacturing cost.SELECTED DRAWING: Figure 3

Description

  The present invention prevents mist generated during cleaning of machine parts, fine dust such as chips and polishing scraps generated during machining of machine parts, and fine dust such as woodworking and plastic powder from being scattered around. The present invention relates to a collection device for collecting mist dust.

  As one type of this type of mist dust collecting device, Japanese Patent Application Laid-Open No. 2006-75688 and Japanese Patent Application Laid-Open No. 2011-67740 include an introduction chamber in which an air suction port is formed and an intermediate chamber communicating with the introduction chamber. And a tank composed of a separation chamber communicating with the intermediate chamber and having a discharge port on the side opposite to the intermediate chamber, a rotating shaft provided in the intermediate chamber, and a plurality of disks fixed to the rotating shaft along the axial direction A rotary brush of the mold, a swinging member fixed to the tip of the rotary shaft, a water injection pump for injecting water into the rotary brush, an inner diameter larger than the outer diameter of the rotary shaft, and a central opening through which the rotary shaft is inserted at the central portion A first partition plate formed and fixed to the intermediate chamber so as to be positioned between adjacent rotating brushes, a suction pipe opening in the separation chamber, a motor for driving the rotary shaft, and a turbo fan connected to the suction pipe Mist dust collection device with It has been disclosed.

  According to this mist dust collection device, air containing mist dust is sucked into the tank from the air suction port of the introduction chamber by a turbo fan, and the sucked air is rotated while being poured into the rotating brush by the water injection pump. By rotating with a brush and a swing-off member, mist dust is struck against the inner surface of the intermediate chamber together with moisture by centrifugal force and separated. Then, the air separated from the mist dust in the intermediate chamber is exhausted to the outside of the tank through the suction pipe, and the moisture containing the separated mist dust is discharged from the outlet of the separation chamber to the outside of the tank.

JP 2006-75688 A JP 2011-67740 A

An object of the present invention is to improve the collection efficiency of mist dusts in a collection device of the above-described type.
It is another object of the present invention to simplify the structure of this type of mist dust collecting device and reduce the manufacturing cost.

In order to achieve the object, the invention described in claim 1
An introduction chamber in which an air suction port is formed, an intermediate chamber in communication with the introduction chamber, a tank in communication with the intermediate chamber, and a separation chamber in which a discharge port is formed on the anti-intermediate chamber side in sequence,
A rotating shaft provided in the intermediate chamber;
A plurality of disk-shaped rotating brushes fixed to the rotating shaft along the axial direction;
A swing-off member fixed to the tip of the rotating shaft;
Water injection means for injecting water into the rotating brush;
A central opening having an inner diameter larger than the outer diameter of the rotating shaft is formed in the center so that a predetermined gap is formed between the rotating shaft and the inserted rotating shaft. A first partition plate fixed to the intermediate chamber so as to be located between,
A suction tube that opens into the separation chamber;
A suction mechanism connected to the drive mechanism of the rotating shaft and the suction pipe,
Air containing mist dust is sucked into the tank from the air suction port of the introduction chamber by the suction mechanism, and water is injected into the rotating brush by the water injection means.
The sucked air is swirled by a rotating brush and a swing-off member rotated by a driving mechanism, and mist dust is struck against the inner surface of the intermediate chamber together with moisture by centrifugal force, and separated.
The air separated from the mist dust in the intermediate chamber is discharged to the outside of the tank through the suction pipe.
A mist dust collecting device configured to discharge moisture containing separated mist dust from the outlet of the separation chamber to the outside of the tank,
By forming a fitting hole into which the rotation shaft is fitted at the center, and having a second partition plate having a peripheral opening around the fitting hole, the first partition plate and the second partition plate are alternately arranged. A bent air flow passing from the central opening to the peripheral opening and from the peripheral opening to the central opening when air is sucked is formed inside the intermediate chamber.

The invention according to claim 2 is the mist dust collecting device according to claim 1,
As the peripheral opening, a plurality of arc-shaped openings are formed concentrically around the fitting hole.

  According to a third aspect of the present invention, in the mist dust collecting device according to the first aspect of the present invention, the air sucked from the air intake port is obtained by assembling an impeller integrally with the rotary shaft as a drive mechanism of the rotary shaft. The rotary shaft is driven by impinging water injected from the water injection means against the impeller.

  According to the first aspect of the present invention, since a bent air flow is formed from the central opening to the peripheral opening and from the peripheral opening to the central opening in the intermediate chamber, the sucked air has a wide area on the surface of the rotating brush. It hits. Therefore, since a strong swirling action is applied to the air by the rotating brush, the collection efficiency of mist dust is improved.

  According to the second aspect of the present invention, a plurality of bent air flows are formed through the central opening of the first partition plate and the plurality of peripheral openings of the second partition plate having an arc shape. Due to the flow of the plurality of bent air, the air hits a wider area on the surface of the rotating brush, and the efficiency of collecting mist dust can be improved.

  According to the third aspect of the invention, the rotary shaft is rotated by impinging the air sucked from the air suction port and the water injection discharged from the water injection means against the impeller. It is not necessary to provide a separate device, and the structure of the apparatus can be simplified, and the manufacturing cost can be reduced.

It is a front view of the collection device of mist and dust concerning the example of the present invention. It is a side view which shows the same collection apparatus. It is an expanded sectional view showing the tank of the collection device. It is a perspective view which shows the impeller of the same collection apparatus. It is a top view which shows the inside of the introduction chamber tank of the collection device. It is a top view which shows the rotating brush of the collection device. It is a side view which shows the rotating brush of the same collection apparatus. It is a top view which shows the 1st partition plate of the same collection apparatus. It is a top view which shows the 2nd partition plate of the same collection apparatus. It is explanatory drawing which shows the repair apparatus and grinder.

  The present invention will be described below with reference to the drawings. 1, 2 and 3 show a mist dust collecting apparatus 10 according to an embodiment of the present invention. The collection device 10 includes a tank 20. The tank 20 includes an introduction chamber tank 21, an intermediate chamber tank 22, and a separation chamber tank 23, which are stacked in order to constitute a cylindrical vertical tank 10.

  The introduction chamber tank 21 is formed of a cylindrical body that is open at both ends and is provided with a flange 21a at the open end. The upper end opening is covered with a lid 24, and the lid 24 is fixed to the flange 21a at the upper end with a bolt. . An air suction port 21 b is formed in the body portion of the introduction chamber tank 21, and a water injection nozzle 25 is attached.

  An air suction pipe 26 is connected to the air suction port 21b. The water injection nozzle 25 is attached so as to face the inside of the introduction chamber tank 21 and is connected to the water injection pipe 27. A bearing unit 28 and an impeller 29 shown in FIG. 4 are assembled at the center of the introduction chamber tank 21. The bearing unit 28 includes a pair of upper and lower bearings 28a and is fixed to the lid body 24 with bolts 28b. A rotating shaft 30 is assembled at the center of the bearing unit 28, and an impeller 29 is integrally rotated at the outer periphery.

  As indicated by arrows A and B in FIG. 5, the air suction port 21 b and the water injection nozzle 25 are arranged so that the air sucked from the air suction port 21 b and the water injection liquid discharged from the water injection nozzle 25 strike the impeller 29. Is arranged.

  The intermediate chamber tank 22 is formed of a cylindrical body that is open at both ends and provided with a flange 22 a at the open end. The flange 22 a at the upper end surface opening is connected to the flange 21 a at the lower end surface opening of the introduction chamber tank 21 by bolts. A rotating shaft 30 is suspended from the center of the intermediate chamber tank 22, and the tip of the rotating shaft 30 extends to the vicinity of the lower end opening end face of the intermediate chamber tank 22. A disc-shaped rotary brush 33 is assembled to the rotary shaft 30 extending to the inside of the intermediate chamber tank 22 through a bush 31 and a sleeve 32 so as to rotate integrally with the rotary shaft 30. Further, a hook-shaped swing-off member 35 is fixed to the tip of the rotating shaft 30 with a nut 34.

  As shown in FIGS. 6 and 7, the rotating brush 33 has a structure in which a large number of brush pieces 33 b project radially on the outer periphery of a boss formed with a shaft hole 33 a for mounting on the rotating shaft 30. Three first partition plates 36 and 37 and two second partition plates 38 are fixed inside the intermediate chamber tank 22. A central opening 36 a is formed at the center of the first partition plate 36. As shown in FIG. 8, a central opening 37 a is formed at the center of the first partition plate 37.

  As shown in FIG. 9, a fitting hole 38a is formed at the center of the second partition plate 38, and four peripheral openings 38b are formed concentrically around the fitting hole 38a. . Each peripheral opening 38b is formed in an arc shape. The rotary shaft 30 is rotatably inserted into the central openings 36a, 37a of the first partition plates 36, 37 and the fitting holes 38a of the second partition plate 38. The inner diameters of the central openings 36a and 37a of the first partition plates 36 and 37 are set larger than the outer diameter so that a predetermined gap is formed between the bush 31 and the spacer 32 attached to the rotary shaft 30. . On the other hand, the inner diameter of the fitting hole 38 a is set so that no gap is generated between the fitting hole 38 a and the spacer 32. The first partition plates 36 and 37 and the second partition plates 38 are alternately arranged, whereby a bent air passage passing from the central opening 36 a to the peripheral opening 38 b and from the peripheral opening 38 b to the central opening 37 a is provided inside the intermediate chamber tank 22. The compartment is formed.

  The separation chamber tank 23 includes a cylindrical portion 23 a having an upper end opened and a funnel portion 23 b communicating with the cylindrical portion 23 a, and a flange 23 c provided at the upper end surface opening end is connected to the flange 22 a at the lower end surface opening end portion of the intermediate chamber tank 22. It is connected with bolts. A suction tube 39 opens downward in the cylindrical portion 23 a of the separation chamber tank 23. The opening 39a is formed in a trumpet shape. A discharge pipe 40 is connected to the lower end opening of the funnel portion 23b. A turbo fan 42 driven by a motor 41, a demister device 43 and a silencer 44 are connected to the suction pipe 39, and a drain pipe 45 is connected to the demister device 43.

The structure of the mist dust collecting device 10 according to the present embodiment is as described above, and the operation when the collecting device is applied to the polishing machine 50 shown in FIG. 10 will be described below.
(1) In the polishing machine 50, when a ferrous or non-ferrous workpiece is polished, a coolant liquid is sprayed from a nozzle (not shown) toward the workpiece and the grindstone. As a result, part of the coolant liquid becomes mist and diffuses into the closed space of the polishing machine. The closed space and the air suction pipe 26 of the collection device 10 communicate with each other via a duct 51.
(2) Therefore, when the collection device 10 is operated, the inside of the tank 20 is maintained at a negative pressure by the operation of the turbo fan 42. Therefore, the mist generated in (1) is air together with the surrounding air. It is sucked into the introduction chamber tank 21 from the suction port 21b. At the same time, the coolant liquid in the coolant tank 52 of the polishing machine 50 is discharged from the water injection nozzle 25 into the introduction chamber tank 21 at a predetermined pressure by the water injection pump 53.
(3) In the introduction chamber tank 21, the air flowing from the air suction port 21 b and the coolant liquid discharged from the water injection nozzle 25 collide with the impeller 29, and the rotating shaft 30 rotates integrally with the impeller 29 and is fixed to the rotating shaft 30. The rotated brush 33 rotates. On the other hand, the air that has flowed into the introduction chamber tank 21 flows into the intermediate chamber tank 22. In the intermediate chamber tank 22, as shown by an arrow C in FIG. 3, a bent air flow is formed through the central openings 36a, 37a of the first partition plates 36, 37 and the peripheral opening 38b of the second partition plate 38, Since it hits the surface of the rotating brush 33 widely, the air flowing into the intermediate chamber tank 22 receives a strong swirling action from the rotating brush 33 and the swing-off member 35. Therefore, the mist in the air is struck against the inner surface of the intermediate chamber tank 22 by centrifugal force and separated from the air, and descends to the separation chamber tank 23 along the inner surface.
(4) The mist descended to the separation chamber tank 23 is returned to the coolant tank 52 from the funnel portion 23b through the discharge pipe 40. Next, the air that has flowed into the separation chamber tank 23 flows into the demister device 43 through the suction pipe 39, where the mist remaining in the air is separated, and the separated mist passes through the drain pipe 45 and becomes the coolant. Returned to the tank 52. Then, the air passes through the exhaust silencer 44 and is discharged outside the apparatus.

  According to the mist dust collecting apparatus 10 according to the present embodiment, the first partition plates 36 and 37 and the second partition plate 38 are inserted into the intermediate chamber tank 22 from the central openings 36a and 37a to the peripheral openings 38b and 38b. As a result, a bent air flow passing through the central opening 37 a is formed, so that air sucked into the tank 20 from the air suction port 21 b of the introduction chamber tank 21 hits a wide area on the surface of the rotary brush 33. Therefore, a strong swirling action is applied to the air by the rotating brush 33, so that the collection efficiency of mist dust is improved.

  In particular, a plurality of bent air flows are formed through the central openings 36a, 37a of the first partition plates 36, 37 and the plurality of peripheral openings 38b of the second partition plate 38 having an arc shape. Due to the flow of the plurality of bent air, the air hits a wider area on the surface of the rotating brush 33, and the collection efficiency of mist dust can be improved.

  Further, since the rotary shaft 30 is rotated by the pressure of the air sucked from the air suction port 21b and the water injection discharged from the water injection nozzle 25, there is no need to separately provide an electric motor or the like as a driving means for the rotary shaft 30. It is possible to simplify the structure and thus reduce the manufacturing cost.

DESCRIPTION OF SYMBOLS 10 ... Mist dust collection device 20 ... Tank 21 ... Introduction chamber tank 21b ... Air suction port 22 ... Intermediate chamber tank 23 ... Separation chamber tank 23b ... Discharge port 25 ... Water injection nozzle 29 ... Impeller 30 ... Rotating shaft 33 ... Rotation Brush 35 ... Swing member 36, 37 ... First partition plate 36a, 37a ... Center opening 38 ... Second partition plate 38a ... Fitting hole 38b ... Peripheral opening 39 ... Suction tube 42 ... Turbo fan

Claims (3)

An introduction chamber in which an air suction port is formed, an intermediate chamber in communication with the introduction chamber, a tank in communication with the intermediate chamber, and a separation chamber in which a discharge port is formed on the anti-intermediate chamber side in sequence,
A rotating shaft provided in the intermediate chamber;
A plurality of disk-shaped rotating brushes fixed to the rotating shaft along the axial direction;
A swing-off member fixed to the tip of the rotating shaft;
Water injection means for injecting water into the rotating brush;
A central opening having an inner diameter larger than the outer diameter of the rotating shaft is formed in the center so that a predetermined gap is formed between the rotating shaft and the inserted rotating shaft. A first partition plate fixed to the intermediate chamber so as to be located between,
A suction tube that opens into the separation chamber;
A suction mechanism connected to the drive mechanism of the rotating shaft and the suction pipe,
Air containing mist dust is sucked into the tank from the air suction port of the introduction chamber by the suction mechanism, and water is injected into the rotating brush by the water injection means
The sucked air is swirled by a rotating brush and a swing-off member rotated by a driving mechanism, and mist dust is struck against the inner surface of the intermediate chamber together with moisture by centrifugal force, and separated.
The air separated from the mist dust in the intermediate chamber is discharged to the outside of the tank through the suction pipe.
A mist dust collecting device configured to discharge moisture containing separated mist dust from the outlet of the separation chamber to the outside of the tank,
By forming a fitting hole into which the rotation shaft is fitted at the center, and having a second partition plate having a peripheral opening around the fitting hole, the first partition plate and the second partition plate are alternately arranged. An apparatus for collecting mist dust, wherein a bent flow of air passing from the central opening to the peripheral opening and from the peripheral opening to the central opening is formed inside the intermediate chamber when air is sucked.   2. The mist dust collecting device according to claim 1, wherein a plurality of openings having an arc shape are formed concentrically around the fitting hole as the peripheral openings.   As the driving mechanism of the rotating shaft, an impeller is integrally assembled with the rotating shaft, and the rotating shaft is driven by impinging the air sucked from the air suction port and the water injection discharged from the water injection means against the impeller. The mist dust collection device according to claim 1.

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