JP2020044495A - Collection device of mist/dust and the like - Google Patents

Abstract

To provide a collection device 10 of mist/dust and the like capable of lowering a height dimension as much as possible.SOLUTION: A tank body 20 constituted with a separation tank 21 where water is mixed in air containing mist/dust and the like, a high speed swirl flow is generated by the action of a cyclone inner guide 24 and the mist/dust and the like and water are separated from air and a recovery tank 22 where the mist/dust and the like separated from air and water are recovered and discharged outside from a drain discharge port 22d and clean air after separating the mist/dust and the like and water is discharged outside has an inner/outer double structure where the separation tank 21 is an inner cylinder and the recovery tank 22 is an outer cylinder. The height dimension of the tank body 20 can be lowered as much as possible and the degree of freedom of the installation place of the collection device 10 of the mist/dust and the like can be enhanced.SELECTED DRAWING: Figure 1

Description

  The present invention is intended to prevent mist generated when cleaning machine parts and the like, fine dust such as cutting chips and polishing dust generated during processing of machine parts and the like, and fine dust such as woodwork powder and plastic powder from scattering around. The present invention relates to a device for collecting mist and dust.

  As one type of a mist / dust collecting device of this kind, Japanese Patent Application Laid-Open No. 2004-275800 discloses a collecting device in which a vertically long cylindrical collecting tank is connected to a lower end of a vertically long cylindrical separating tank. Is disclosed. The lower part of the separation tank of this trapping device is formed in a tapered cross-sectional shape. An air inlet and a spray nozzle are provided on the upper outer peripheral surface of the separation tank, and an air outlet is protruded upward from the upper end surface of the separation tank.

In the above-mentioned conventional mist / dust collection device, water is sprayed from the spray nozzle into the mist / dust-containing air flowing into the separation tank from the air inlet into the separation tank, and mixed with the mist / dust. A swirling flow of air containing dust and water is generated in the separation tank, and mist / dust and water are separated from the air by centrifugal force generated by the swirling flow.
Then, the separated mist, dust and water flow down from the separation tank to the collection tank, and are discharged to the outside through a drain outlet provided at the bottom of the collection tank to be collected. On the other hand, clean air from which mist / dust and water are separated is discharged from the air discharge port to the outside of the separation tank.

JP-A-2004-275800

In a conventional mist / dust collection device, a vertically long cylindrical separating tank and a collecting tank are vertically connected to each other, so that the height of the entire device is large, which limits the installation place.
The present invention has been made in view of the above problems, and has as its object to provide a mist / dust collecting device capable of reducing the height dimension as much as possible.

The mist / dust collection device according to the invention of claim 1 is:
The upper end face is hermetically covered, the lower end face has a cylindrical separation tank having an open inner cylinder, and an inner / outer dual tank body having a cylindrical recovery tank as an outer cylinder.
Insert into the separation tank from the top end of the collection tank and cover the top end of the collection tank airtightly.
The separation tank and the collection tank are communicated through the opening at the lower end face of the separation tank,
An air inlet is provided on the upper outer periphery of the separation tank that protrudes upward from the upper end surface of the collection tank, and communicates with the separation tank.
An air suction port is provided on the outer peripheral surface of the collection tank, and a drain outlet is provided at the bottom of the collection tank.
The cross-sectional shape has a cylindrical structure with a truncated cone, and a cyclone inner guide whose outer diameter gradually increases from the upper end to the lower end is vertically suspended from the upper part of the separation tank into the separation tank,
Provide a water injection nozzle to inject water into the separation tank, connect an air suction mechanism to the air suction port,
By suctioning the air in the collection tank from the air suction port with the air suction mechanism, air containing mist and dust is introduced into the separation tank from the air inlet and water is injected from the water injection nozzle.
In the separation tank, a swirling flow of air and water containing mist and dust is generated to separate mist, dust and water from the air.
Mist, dust, and water are discharged from a drain outlet of the collection tank, and air separated from the mist, dust, and water is discharged to the outside of the collection tank from an air suction port.

  Then, preferably, the air inlet is tapered toward the separation tank as described in claim 2, and the air is introduced from the air inlet along the tangential direction of the separation tank. Deploy.

  Preferably, the water injection nozzle is arranged so that water is injected from the water injection nozzle toward a lid that covers the upper end surface of the separation tank.

  Preferably, at least two water injection nozzles are arranged symmetrically with respect to the center line of the separation tank as described in claim 4, and the water injection directions of both water injection nozzles are opposite to each other, and It is arranged so as to form an angle of 45 degrees with a straight line connecting the water injection nozzles.

  According to the mist / dust collection device according to the present invention, since the separation tank has an inner cylinder and the collection tank has an inner / outer dual structure having an outer cylinder, the height of the tank body is as small as possible. And the degree of freedom of the installation location of the mist / dust collection device can be increased.

It is a front view showing the mist and dust collection device concerning the example of the present invention. It is a side view which shows the same collector. It is an expanded sectional view showing the tank main part of the collection device. FIG. 4 is a sectional view taken along line 4-4 in FIG. 3. It is explanatory drawing which shows the example of application of the collection device.

  Hereinafter, the present invention will be described with reference to the drawings. FIGS. 1, 2 and 3 show a mist / dust collecting device 10 according to an embodiment of the present invention. The collection device 10 includes a tank body 20. The tank main body 20 has an inner / outer double structure in which a cylindrical separation tank 21 is used as an inner cylinder, and a cylindrical recovery tank 22 is used as an outer cylinder.

  3, the upper end surface of the separation tank 21 is air-tightly covered with a lid 23, and the lower end surface is formed in an opening 21a. The separating tank 21 is inserted into the collecting tank 22 from the upper end face of the cylindrical collecting tank 22, the separating tank 21 and the collecting tank 22 communicate with each other through the opening 21a, and the upper end face of the collecting tank 22 is covered with a lid. It is airtightly covered with the body 22a.

  An air inlet 21b communicating with the inside of the separation tank 21 is provided at an upper outer peripheral portion of the separation tank 21 projecting upward from an upper end surface of the collection tank 22. An air suction port 22b is provided on the outer peripheral surface of the collection tank 22. The bottom 22c of the collection tank 22 is tapered, and a drain outlet 22d is provided at the center of the bottom 22c.

  A cyclone inner guide 24 is provided inside the separation tank 21. The cyclone inner guide 24 has a cylindrical structure with a truncated conical cross section, and is formed to have an outer diameter whose outer diameter gradually increases from the upper end to the lower end. The cyclone inner guide 24 is fixed to the lid 23 with bolts 25, and is suspended from the lid 23 into the separation tank 21 so that the center line thereof substantially coincides with the center line of the separation tank 21. Since the separation tank 21 has a cylindrical shape, and the cyclone inner guide 24 has a truncated cone shape, the distance between the inner peripheral surface of the separation tank 21 and the outer peripheral surface of the cyclone inner guide 24 gradually decreases.

  As shown in FIG. 4, the air inlet 21 b is formed in a shape that tapers toward the separation tank 21. In addition, the flow of the air flowing into the separation tank 21 from the air inlet 21b is arranged so as to be substantially tangential to the separation tank 21.

Two water injection nozzles 26 for injecting water into the separation tank 21 are attached to the lid 23. Each water injection nozzle 26 is arranged so that water is injected toward the lid 23.
The two water injection nozzles 26 are arranged symmetrically with respect to the center line O of the separation tank 21, and the water injection directions of the two water injection nozzles 26 are opposite to each other, and a straight line L connecting the two water injection nozzles 26 is provided. Are arranged at an angle of 45 degrees with respect to.

  The drain pipe 27 is connected to the drain outlet 22d. On the other hand, a turbo fan 28 is connected to the air suction port 22b. The turbo fan 28 has a drive motor 28a. An exhaust silencer 28c is attached to an exhaust pipe 28b of the turbo fan 28. A drain outlet 28d of the exhaust silencer 28c is connected to a water storage tank 29 described later via a drain pipe 28e.

  The tank main body 20 is installed above the water storage tank 29 by a column 30 erected on the water storage tank 29. A magnet separator 31 and a circulation pump 32 are installed on the upper surface of the water storage tank 29, and a collection box 33 for iron-based fine dust is attached to the side surface. A caster 34 is attached to the bottom of the water storage tank 29. Since the water supply pipe 36 is connected to the water storage tank 29 via the ball tap 35, the water storage amount can be maintained at a constant water level. The water injection nozzle 26 attached to the separation tank 21 is connected to a circulation pump 32 via a water injection pipe 37. The drain discharged from the drain outlet 22 d of the collection tank 22 is introduced into the magnet separator 31 by the drain pipe 27 and then returned to the water storage tank 29.

The structure of the mist / dust collecting device 10 according to the present embodiment is as described above. The mist / dust collecting device 10 is generated when the mechanical component 101 is processed by the machining center 100 shown in FIG. The operation when the present invention is applied to the collection of dust such as cutting 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 via the duct 102. When the collection device 10 is operated, the air in the collection tank 22 is sucked from the air suction port 22b by the operation of the turbo fan 28, and the inside of the collection tank 22 is maintained at a negative pressure. Dust generated at the time of processing is sucked into the separation tank 21 from the air inlet 21b together with the surrounding air. At the same time, the water in the water storage tank 29 is injected from the water injection nozzle 26 toward the lid 23 by the circulation pump 32, falls down from the lid 23, and is mixed with air containing dust.

  With the operation of the turbo fan 28, the air flowing from the air inlet 21 b of the separation tank 21 becomes a high-speed swirling flow in the separation tank 21 by the action of the cyclone inner guide 24. Therefore, dust and moisture in the air are beaten against the inner surface of the separation tank 21 by centrifugal force, separated from the air, and descend along the inner surface of the separation tank 21 to the collection tank 22. The clean air separated from the mist / dust and water is discharged to the outside from the exhaust silencer 28c.

  The water containing the dust that has fallen into the collection tank 22 is introduced into the magnet separator 31 from the drain outlet 22d through the drain pipe 27, and the iron-based fine dust in the dust is magnetized (not shown) in the magnet separator 31. , And is stored in the collection box 33.

  According to the mist / dust collection device 10 according to the present embodiment, water is mixed into the air containing the mist / dust, and a high-speed swirling flow is generated by the action of the cyclone inner guide 24 to generate mist / dust from the air. A separation tank 21 for separating dust and water, a mist / dust separated from air and water are collected and discharged to the outside from a drain outlet 22d, and a clean mist separated from water is separated from the mist / dust and water. The tank main body 20 composed of the recovery tank 22 for discharging air to the outside has an inner / outer double structure in which the separation tank 21 is an inner cylinder and the recovery tank 22 is an outer cylinder. The size can be made as low as possible, and the degree of freedom of the installation location of the mist / dust collection device 10 can be increased.

  Since the air inlet 21b is tapered toward the separation tank 21, the flow velocity of the swirling flow generated in the separation tank 21 can be increased. Therefore, the action of separating mist / dust and water from air by centrifugal force can be further enhanced.

  Since water is injected from the water injection nozzle 26 toward the lid 23 that covers the upper end opening of the separation tank 21, the injected water bounces off the lid 23 and is sprayed to the cyclone inner guide 24. Therefore, water can be evenly injected from the water injection nozzle 26 to the cyclone inner guide 24, and the water injection region is not unevenly distributed.

  Further, the two water injection nozzles 26 are arranged at symmetric positions with respect to the rotation axis 30, and the discharge directions of the respective water injection nozzles 26 are arranged at about 45 degrees with respect to a straight line connecting the rotation axis 30 and the water injection nozzle 26. Therefore, the water discharged from the water injection nozzle 26 becomes a swirling flow and hits the lid 23. Therefore, water is evenly poured from the lid 23 to the cyclone inner guide 24.

DESCRIPTION OF SYMBOLS 10 ... Mist / dust collection device 20 ... Tank main body 21 ... Separation tank 21a ... Opening 21b ... Air introduction port 22 ... Recovery tank 22b ... Air suction port 22d ... Drain discharge port 23 ... Lid 24 ... Cyclone inner Guide 26: Water injection nozzle 28: Turbo fan (air suction mechanism)
O: Center line L: Straight line

Claims (4)

The upper end face is hermetically covered, the lower end face has a cylindrical separation tank having an open inner cylinder, and an inner / outer dual tank body having a cylindrical recovery tank as an outer cylinder.
Insert into the separation tank from the top end of the collection tank and cover the top end of the collection tank airtightly.
The separation tank and the collection tank are communicated through the opening at the lower end face of the separation tank,
An air inlet is provided on the upper outer periphery of the separation tank that protrudes upward from the upper end surface of the collection tank, and communicates with the separation tank.
An air suction port is provided on the outer peripheral surface of the collection tank, and a drain outlet is provided at the bottom of the collection tank.
The cross-sectional shape has a cylindrical structure with a truncated cone, and a cyclone inner guide whose outer diameter gradually increases from the upper end to the lower end is vertically suspended from the upper part of the separation tank into the separation tank,
Provide a water injection nozzle to inject water into the separation tank, connect an air suction mechanism to the air suction port,
By suctioning the air in the collection tank from the air suction port with the air suction mechanism, air containing mist and dust is introduced into the separation tank from the air inlet and water is injected from the water injection nozzle.
In the separation tank, a swirling flow of air and water containing mist and dust is generated to separate mist, dust and water from the air.
Mist characterized by discharging mist, dust, and water from the drain outlet of the recovery tank, and discharging air separated from the mist, dust, and water to the outside of the recovery tank from the air suction port・ Dust collection device.   2. The air inlet according to claim 1, wherein the air inlet is tapered toward the separation tank, and air is introduced from the air inlet along a tangential direction of the separation tank. 3. Mist and dust collection equipment.   The mist / dust collection device according to claim 1, wherein a water injection nozzle is arranged so that water is injected from the water injection nozzle toward a lid that covers an upper end surface of the separation tank.   At least two water injection nozzles are arranged symmetrically with respect to the center line of the separation tank, and the water injection directions of both water injection nozzles are opposite to each other, and the angle of 45 degrees with respect to a straight line connecting both water injection nozzles is set. The device for collecting mist and dust according to claim 3, wherein the device is arranged so as to form a mist.

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