JP2019171305A - Device for collecting mist and dust - Google Patents

Abstract

To provide a collection device 10 for collecting mist and dust capable of reducing the amount of sticking of dust to a rotary brush 33 as much as possible.SOLUTION: An air introduction port 21b is formed in a tapered shape toward an introduction chamber tank 21. A flow speed of a swirling flow generated in the introduction chamber tank 21 can be enhanced. Since a high-speed swirling flow acts on a rotary brush 33 located in a mist-dust separation chamber tank 22, a rotary shaft 30 and the rotary brush 33 rotate even without an impeller. Thus, an impeller can be omitted, which can prevent a situation in which mist is generated by collision of water discharged from a water filling nozzle 25 with an impeller, a wet area wetted with the mist is formed in the vicinity of the air introduction port 21b, and dry dust stick to the wet area.SELECTED DRAWING: Figure 1

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 and dust.

  As one type of this type of mist / dust collection device, Japanese Patent No. 5701925 discloses an introduction chamber provided with an air inlet and a water injection nozzle, and a mist / dust separation chamber communicating with the introduction chamber. And a mist / dust collection device including a tank comprising a recovery chamber which is connected to a mist / dust separation chamber, provided with a drain discharge port and provided with an air suction port connected to a turbofan. Yes.

  In this mist / dust collection device, a rotary shaft that extends through the introduction chamber to the mist / dust separation chamber is provided in the tank, and the impeller is integrally assembled on the top of the rotation shaft, and the impeller is installed in the introduction chamber. Is arranged. In addition, the rotating brush is integrally assembled to the lower part of the rotating shaft, the swinging member is integrally assembled to the lower end portion of the rotating shaft, and the rotating brush and the swinging member are disposed in the mist / dust separation chamber.

  According to this mist / dust collection device, the air in the tank is sucked from the air suction port by the turbo fan, and the air containing the mist / dust from the air introduction port along the inner peripheral surface of the introduction chamber. In addition, the rotating shaft is rotated by applying water discharged from the water injection nozzle to the impeller. Then, the air flowing into the mist / dust separation chamber is swirled by a rotating brush and a swing-off member, and the mist / dust is struck against the inner surface of the mist / dust separation chamber together with the water injected from the water injection nozzle by centrifugal force. Is separated from The air that has separated mist and dust in the mist / dust separation chamber is discharged from the air suction port of the recovery chamber to the outside of the tank, and the water containing the separated mist / dust is discharged from the drain discharge port of the recovery chamber to the outside of the tank. To be discharged.

Japanese Patent No. 5701925

In conventional mist / dust collection devices, the rotating shaft with a rotating brush and swing-off member is rotated, so that air flowing into the introduction chamber from the air introduction port strikes the impeller and is discharged from the water injection nozzle. Water impinges on the impeller.
However, when the water discharged from the water injection nozzle strikes the impeller, a part of the water becomes mist, so that a wet region wet with mist is formed near the air inlet. There has been a problem that dry dust adheres to the wet area and cannot be collected.

  Moreover, since the water discharged from the water injection nozzle is sprinkled by the rotating impeller, the water injection region in the rotating brush is unevenly distributed on the outer end side of the rotating brush. Therefore, when a device is used for a long period of one year or longer, a large amount of dust adheres to the rotating brush, and therefore, it is essential to disassemble the tank and clean the rotating brush.

  In view of such problems, an object of the present invention is to provide a mist / dust collecting device that can reduce the amount of dust adhering to a rotating brush as much as possible.

The invention described in claim 1
An inlet chamber with an air inlet and a water injection nozzle, a mist / dust separation chamber communicating with the inlet chamber, a mist / dust separation chamber and a drain discharge port and connected to an air suction mechanism. Equipped with a tank consisting of a collection chamber with an air suction port
A rotating shaft extending through the introduction chamber to the mist / dust separation chamber is provided in the tank,
A rotating brush is integrally assembled to the lower part of the rotating shaft, a swinging member is integrally assembled to the lower end of the rotating shaft, and the rotating brush and the swinging member are arranged in the mist / dust separation chamber.
By sucking air in the tank from the air suction port with the air suction mechanism, air containing mist and dust is introduced from the air introduction port into the introduction chamber so as to form a swirling flow along the inner peripheral surface of the introduction chamber. , Pour water into the rotating brush with the water injection nozzle,
The rotating shaft is rotated by the air flowing into the mist / dust chamber as a swirling flow from the introduction chamber, and the mist / dust in the air flowing into the mist / dust separation chamber is mist together with the water injected from the water injection nozzle.・ Apply to the inner surface of the dust separation chamber to separate it from the air,
In addition to discharging the air separated from the mist and dust in the mist / dust separation chamber from the air suction port of the recovery chamber to the outside of the tank,
A mist / dust collecting device configured to discharge moisture containing separated mist / dust from the drain outlet of the recovery chamber to the outside of the tank,
The air introduction port is tapered toward the introduction chamber.

  Preferably, water is injected from a water injection nozzle toward a lid that covers the upper end opening of the introduction chamber.

  Preferably, the two water injection nozzles are arranged at symmetrical positions with respect to the rotation axis, and the discharge direction of each water injection nozzle is arranged at about 45 degrees with respect to a straight line connecting the rotation axis and the water injection nozzle.

According to the present invention, since the air inlet is tapered toward the introduction chamber, the flow velocity of the swirling flow generated in the introduction chamber can be increased. Since the high-speed swirling flow acts on the rotating brush disposed in the mist / dust separation chamber, the rotating shaft rotates without an impeller. Therefore, since the impeller can be omitted, the water discharged from the water injection nozzle hits the impeller and mist is generated, and a wet area wet with the mist is formed near the air inlet, and dry dust is generated in the wet area. Can be prevented. In addition, water can be evenly injected from the water injection nozzle onto the rotating brush, and the water injection area is not unevenly distributed. Therefore, it can suppress that dust adheres to a rotating brush.

It is the partially broken front view of the mist and dust collection device 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 sectional drawing cut | disconnected from the 4-4 line | wire of FIG. 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 explanatory drawing which shows the example of application of the same collection apparatus.

  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, a mist / dust separation chamber tank 22 and a recovery chamber tank 23.

  The introduction chamber tank 21 is formed of a cylindrical body that is open at both ends and provided with a flange 21a at the opening 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 introduction port 21 b (see FIG. 3) is formed in the body portion of the introduction chamber tank 21. Two water injection nozzles 25 are attached to the lid body 24 so as to face the inside of the introduction chamber tank 21, and are connected to the water injection pipe 27.

  A bearing unit 28 is 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. The shaft 30 is rotatably supported by the bearing unit 28. The rotary shaft 30 extends through the introduction chamber tank 21 to an intermediate portion of the mist / dust separation chamber tank 22.

  The mist / dust separation chamber tank 22 and the recovery chamber tank 23 are inner and outer double cylinders having the recovery chamber 23 as an outer cylinder and the mist / dust separation chamber tank 22 as an inner cylinder accommodated in the recovery chamber tank 23. The cylindrical body 20A is connected to the flange 21a of the lower end surface opening of the introduction chamber tank 21 with a bolt. The mist / dust separation chamber tank 22 constituting the inner cylinder is open at both upper and lower end faces, the upper end face opening communicates with the introduction chamber tank 21, and the lower end face opening communicates with the recovery chamber tank 23 constituting the outer cylinder. . Three disk-shaped rotary brushes 33 are assembled to the rotary shaft 30 extending to the middle part of the mist / dust separation chamber tank 22 via the sleeve 31a and the bush 31b so as to rotate integrally with the rotary shaft 30. Arranged in the separation chamber 22. Further, a bowl-shaped swing-off member 35 is fixed to the distal end portion of the rotating shaft 30 with a nut 34 and is disposed in the mist / dust separation chamber 22.

  As shown in FIG. 4, the air introduction port 21 b is arranged at a required position so that the air introduced into the introduction chamber tank 21 flows along the inner surface of the introduction chamber tank 21 and forms a swirling flow. Further, the air introduction port 21b is tapered toward the introduction chamber tank 21 so that the flow velocity of the swirling flow can be increased.

Each water injection nozzle 25 is connected to the water injection pipe 27 via a ball joint 25a, and the discharge direction is adjusted by the ball joint 25a so that water is injected toward the lid body 24 of the introduction chamber tank 21.
Further, the two water injection nozzles 25 are arranged at symmetrical positions with respect to the rotation shaft 30 so that the flow along the swirl flow is likely to occur, and the discharge directions of the water injection nozzles 25 are opposite to each other, and the center of the rotation shaft 30 It arrange | positions so that about 45 degree | times may be comprised with respect to the straight line which connects O1 and the center O2 of the ball joint 25a of the water injection nozzle 25. FIG.

  As shown in FIGS. 5 and 6, 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.

  A drain discharge port 23a is provided at the bottom of the recovery chamber tank 23, and a drain pipe 36 is connected to the drain discharge port 23a. An air suction port 23b is formed on the outer peripheral surface of the recovery chamber tank 23, and a turbo fan 37 is connected to the air suction port 23b. The turbo fan 37 includes a drive motor 37a. An exhaust silencer 37 c is attached to the exhaust pipe 37 b of the turbo fan 37. A drain discharge port 37d of the exhaust silencer 37c is connected to a water storage tank 38 described later via a drain pipe 37e.

  The tank 20 is installed above the water storage tank 38 by a column 39 standing on the water storage tank 38. A magnet separator 40 and a circulation pump 41 are installed on the upper surface of the water storage tank 38, and a recovery box 42 for iron-based fine dust is attached to the side surface. A caster 43 is attached to the bottom of the water storage tank 38. Since the water supply pipe 45 is connected to the water storage tank 38 via the ball tap 44, the water storage amount can be maintained at a constant water level. A water injection nozzle 25 attached to the introduction chamber tank 21 is connected to a circulation pump 41 via a water injection pipe 27. The drain discharged from the drain outlet 23 a of the recovery chamber tank 23 is introduced into the magnet separator 40 by the drain pipe 36 and then returned to the water storage tank 38.

The structure of the mist / dust collecting device 10 according to the present embodiment is as described above, and is generated when the mechanical device 101 is processed by the machining center 100 shown in FIG. The action when applied to the collection of dust such as chips, particularly iron-based fine dust will be described.
The closed space of the machining center 100 and the air inlet 21b of the collection device 10 are communicated with each other via a duct 102. When the collection device 10 is operated, the inside of the tank 20 is held at a negative pressure by the operation of the turbo fan 37, so that dust generated during processing of the machine part 101 is introduced into the air inlet along with the surrounding air. It is sucked into the introduction chamber tank 21 from 21b. At the same time, the water in the water storage tank 38 is discharged from the water injection nozzle 25 into the introduction chamber tank 21 by the circulation pump 41.

  Along with the operation of the turbo fan 37, the air flowing in from the air inlet 21 b of the introduction chamber tank 21 becomes a high-speed swirling flow and collides with the rotating brush 33 of the mist / dust separation chamber tank 22. 33 rotates. At the same time, water discharged from the water injection nozzle 25 toward the lid body 24 falls from the lid body 24 onto the rotating brush 33. The air flowing into the mist / dust separation chamber tank 22 is subjected to a strong swirling action from the rotating brush 33 and the swing-off member 35. Therefore, dust and moisture in the air are struck by the centrifugal force against the inner surface of the mist / dust separation chamber tank 22 and separated from the air, and are transferred to the recovery chamber tank 23 through the inner surface of the mist / dust separation chamber tank 22. Descent.

  Water containing dust that has fallen to the recovery chamber tank 23 is introduced from the drain outlet 23a through the drain pipe 36 into the magnet separator 40, and the iron-based fine dust in the dust is magnetized by the magnet separator 40 (not shown). Is removed by adsorption and stored in the collection box 42.

  According to the mist / dust collecting apparatus 10 according to the present embodiment, the air introduction port 21b is tapered toward the introduction chamber tank 21, so that the flow velocity of the swirling flow generated in the introduction chamber tank 21 is increased. Can do. Since the high-speed swirling flow acts on the rotating brush 33 disposed in the mist / dust separation chamber tank 22, the rotating shaft 30 and the rotating brush 33 rotate without the impeller. Therefore, since the impeller can be omitted, the water discharged from the water injection nozzle 25 strikes the impeller and mist is generated, and a wet region wet with the mist is formed in the vicinity of the air inlet 21b, and the wet region is dry. It can prevent dust from adhering.

  In particular, in this embodiment, since water is injected from the water injection nozzle 25 toward the lid body 24 that covers the upper end opening of the introduction chamber tank 21, the injected water bounces off the lid body 24 and is sprayed onto the rotating brush 33. For this reason, water can be poured evenly from the water injection nozzle 25 onto the rotary brush 33 and the water injection region is not unevenly distributed, so that it is possible to suppress dust from adhering to the rotary brush 33.

  Further, the two water injection nozzles 25 are arranged at symmetrical positions with respect to the rotation axis 30, and the discharge directions of the respective water injection nozzles 25 are arranged so as to form about 45 degrees with respect to a straight line connecting the rotation axis 30 and the water injection nozzle 25. Therefore, the water discharged from the water injection nozzle 25 hits the lid body 24 as a swirling flow. Therefore, water is poured evenly from the lid 24 onto the rotating brush 33.

DESCRIPTION OF SYMBOLS 10 ... Mist / dust collection apparatus 20 ... Tank 20A ... Inner / outer double cylinder 21 ... Introduction chamber tank 21a ... Flange 21b ... Air introduction port 22 ... Mist / dust separation chamber tank 23 ... Recovery chamber tank 23a ... Drain discharge port 23b ... Air suction port 24 ... Cover body 25 ... Water injection nozzle 30 ... Rotating shaft 33 ... Rotating brush 35 ... Swing member 37 ... Turbo fan 37d ... Drain discharge port

Claims (3)

An inlet chamber with an air inlet and a water injection nozzle, a mist / dust separation chamber communicating with the inlet chamber, a mist / dust separation chamber and a drain discharge port and connected to an air suction mechanism. Equipped with a tank consisting of a collection chamber with an air suction port
A rotating shaft extending through the introduction chamber to the mist / dust separation chamber is provided in the tank,
A rotating brush is integrally assembled to the lower part of the rotating shaft, a swinging member is integrally assembled to the lower end of the rotating shaft, and the rotating brush and the swinging member are arranged in the mist / dust separation chamber.
By sucking air in the tank from the air suction port with the air suction mechanism, air containing mist and dust is introduced from the air introduction port into the introduction chamber so as to form a swirling flow along the inner peripheral surface of the introduction chamber. , Pour water into the rotating brush with the water injection nozzle,
The rotating shaft is rotated by the air flowing into the mist / dust chamber as a swirling flow from the introduction chamber, and the mist / dust in the air flowing into the mist / dust separation chamber is mist together with the water injected from the water injection nozzle.・ Apply to the inner surface of the dust separation chamber to separate it from the air,
In addition to discharging the air separated from the mist and dust in the mist / dust separation chamber from the air suction port of the recovery chamber to the outside of the tank,
A mist / dust collecting device configured to discharge moisture containing separated mist / dust from the drain outlet of the recovery chamber to the outside of the tank,
A mist / dust collecting apparatus, wherein the air inlet is tapered toward the introduction chamber.   The mist / dust collecting apparatus according to claim 1, wherein water is injected from a water injection nozzle toward a lid that covers an upper end opening of the introduction chamber.   The two water injection nozzles are arranged at symmetrical positions with respect to the rotation axis, and the discharge directions of the respective water injection nozzles are arranged so as to form about 45 degrees with respect to a straight line connecting the rotation axis and the water injection nozzle. The mist / dust collecting apparatus according to 1.

Images