JP4053548B2 - Mist collection device - Google Patents

Description

  The present invention includes mineral light oil mist / water-soluble oil mist generated during general workpiece cleaning / drying operations and cutting of parts in machine tools, fumes including oil components generated during arc welding in a welding workshop, etc. The present invention relates to a mist collection device having a particle size of about 1 μm.

  Various types of mist collecting devices are known, such as a fixed filter method, a demister method, a collision plate method, and an electric dust collection method. Examples of the mist to be collected include a fume containing an oil component generated during arc welding of iron or the like, a mineral light oil mist generated when cutting a part in a machine tool, and the like. In particular, it is difficult to collect fume containing an oil component generated during arc welding of iron material because the particle size is as fine as 1 μm. Since such fine mist causes oily odor and “hazy phenomenon” due to mist diffusion in factories, it is a mist that eliminates these problems from the viewpoint of improving the working environment and protecting the health of workers. Development of a collection device is desired.

In Japanese Utility Model Publication No. 48-7745, a disk-shaped fan combined filter made of felt-like material is provided on the motor output shaft which is projected into a fan casing which is an integrated upper case and lower case. Two sheets are fixed in a stack, and a plurality of fan blades constituting a centrifugal fan are radially sandwiched and fixed to the overlapping surface of the filter. When air containing dust flowing into the fan casing from the air inlet passes through the filter, There is disclosed an “air purifier” configured to filter dust and discharge the dust from the exhaust port of the casing.

  In the air purifier described in the utility model publication, the filter has a disk shape made of a felt-like substance, but nothing is described about the size of the filter hole. Furthermore, it can be said that the structure is not intended to collect fume and fine oil mist generated during welding in view of the description of filtering dust with a filter.

Moreover, the "impeller for air cleaner" described in Utility Model Registration No. 2580311, between the main disk provided with the boss fixed to the shaft of the motor and the sub disk provided with the intake port, In an impeller provided with a large number of blades that send out air flowing in from the intake port while guiding it in the circumferential direction, the blade is configured to be reinforced by sandwiching a porous metal body having air permeability with a punching plate. ing. In this air purifier, the contaminated air sucked from the intake port is filtered when sent in the circumferential direction by the blades, but it is not possible to sufficiently collect dust with the metal porous body alone, A filter layer formed of an adsorption mat or felt filter material is provided on the main body side to remove contaminants.
Therefore, any of the air purifiers disclosed in any of the above-mentioned publications is configured so that all of the air containing dust or contaminants sucked into the fan casing or the like passes through the rotating filter or impeller. In view of the description in the specification, it is considered that the invention is not intended to collect fume or fine oil mist generated during welding.
Japanese Utility Model Publication No. 48-7745 Utility Model Registration No. 2580311

  The object of the present invention is to collect a small mist having a particle size of about 1 μm, such as oil mist generated when cutting a part in a machine tool and fumes containing oil generated during arc welding. An object of the present invention is to provide a mist collection device having excellent collection efficiency.

  In order to achieve the above object, the invention described in claim 1 is arranged such that an output shaft of a motor device is arranged so as to face a case into which air containing mist flows and a fan and a filter are attached to the output shaft. In the mist collecting device configured to remove the mist in the air sucked into the case by rotating the fan by the motor device, and to discharge clean air to the outside, the opening of the case A turbo fan as the fan is arranged in a fan casing provided so as to communicate with the end, and the filter is detachably provided at the peripheral portion of the suction port of the turbo fan, and the filter has a large number of small holes. A cylindrical body having at least one inner demister member made of a nonwoven fabric having a mesh of 10 μm and a nonwoven fabric having a mesh of 50 μm; 2 to 3 layers of intermediate demister members and 3 to 4 layers of outer demister members made of nonwoven fabric with a mesh of 100 μm are wound so as to be stacked in order, and mists are produced by rotating the turbofan at a high speed by the motor device. The air containing air is sucked into the case, mists in the sucked air are removed by a rotating filter, and the air that has passed through the cylinder through the small hole of the filter flows into the turbofan to discharge the fan casing. It is characterized by discharging from the outlet to the outside.

  In order to achieve the same object, the invention described in claim 2 arranges the output shaft of the motor device so as to face the case into which air containing mist flows, and attaches a fan and a filter to the output shaft. In the mist collecting apparatus configured to remove mists in the air sucked into the case by rotating a fan by the motor device and to discharge clean air to the outside, A turbo fan as the fan is arranged in a fan casing provided so as to communicate with the open end, and the filter is detachably provided on a peripheral portion of the suction port of the turbo fan, and the filter has a large number of small holes. A filter member in which a large number of wrinkles are connected in a concavo-convex shape with a nonwoven fabric of about 10 μm mesh is attached to the body of the formed cylindrical body. Air containing mists is sucked into the case by rotating a turbofan with a motor device, and the mists in the sucked air are removed by a rotating filter, and then passed through the small hole of the filter through the cylinder. It is characterized in that air is introduced into the turbofan and discharged from the discharge port of the fan casing to the outside.

  In order to achieve the same object, the invention described in claim 3 is the mist collection device according to claim 1 or 2, wherein the case and the output shaft are horizontally or vertically oriented. It is characterized by comprising.

  In order to achieve the same object, the invention described in claim 4 is the mist collecting apparatus according to any one of claims 1 to 3, wherein the case is provided with a water injection port of water injection means, and the water injection port The cleaning water is provided so as to drop on the outer surface of the rotating filter.

(Invention of Claim 1)
This mist collection device has a compact structure in which air containing mist is passed through a filter that rotates at high speed to remove the mist, and the purified air is discharged to the outside. By making the mesh size three stages, the phenomenon that water droplets are discharged from the discharge port of the fan casing is eliminated, and the collection of sticky fume containing mist or oil with a particle size of about 1 μm is possible. Removal can be performed efficiently. Furthermore, it is an effective measure to avoid the situation where mist spreads in the machine tool room and factory, contributing to the improvement of the working environment and the elimination of the “haze phenomenon” caused by mist spreading in the factory. can do.

(Invention of Claim 2)
This mist collection device has a compact structure in which air containing mist is passed through a filter that rotates at high speed to remove the mist, and the cleaned air is discharged to the outside. The particle size is about 1 μm. It is possible to efficiently collect and remove sticky fumes containing mist and oil of a certain size.

(Invention of Claim 3)
Since the mist collecting device can be configured in either a horizontal type or a vertical type, it can be adapted to various installation locations.

(Invention of Claim 4)
This mist collection device is provided so that washing water is dripped onto the outer surface of the filter rotating from the water inlet, so that the fume and oil mist adhering to the surface of the filter is washed away by centrifugal force action. By splashing them together with the washing water, the collection efficiency of mists can be improved and the filter can be cleaned.

  The best mode of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal side view of a horizontal collecting apparatus for mists according to the first embodiment, FIG. 2 is an enlarged cross-sectional view taken along the line m-m in FIG. 1, and FIG. 3 is a horizontal collecting of mists according to the second embodiment. FIG. 4 is an enlarged sectional view taken along line nn in FIG. 3.

(Example 1)
A horizontal collecting device A for mists according to the first embodiment is shown in FIG. In the case 1 which is set sideways of the collecting device A, the suction port 3 and the drain port 4 are opened at appropriate positions on the body 2a of the cylindrical case body 2, the cover 6 is attached to one open end 2b, The fan casing 8 is provided so as to communicate with the open end 2c. The fan casing 8 is provided so that the case main body side casing portion 8a and the motor side casing portion 8b, which are formed in two parts, are joined together and tightened with a bolt (not shown). Reference numeral 10 denotes a discharge port formed so as to communicate with the casing chamber 9 of the fan casing 8. A motor device 15 is attached to a mounting seat 8c disposed at the center of the motor side casing portion 8b. An annular seal 11 and a ball bearing 12 are sequentially mounted in a stepped hole 8d formed at the center of the mounting seat 8c.

  The output shaft 18 of the motor device 15 is rotatably supported by a ball bearing 17 incorporated in the rear part of the motor body 16 and the ball bearing 12. The turbo fan 20 is fixed by inserting a boss 20a of a turbo fan 20 as a fan and screwing a nut 22 into a tip end portion 18a of the output shaft 18 protruding into the casing chamber 9. A flywheel 23 having a cooling fan 23a is attached to the rear end portion 18b of the output shaft 18. The filter 25 can be attached to and detached from the peripheral edge 21 a of the suction port 21 of the turbofan 20 by tightening or loosening the base portion 26 a of the filter 25 with a bolt 32.

  In addition, about the turbofan 20, it is desirable to employ | adopt what can obtain the vacuum degree of -1.0kPa--2.5kPa.

  The filter 25 has an inner demister member 28 made of a nonwoven fabric having a mesh of 10 μm and a thickness of 0.3 mm, a mesh 50 μm, a thickness of 10 μm and a thickness of 0.3 mm in a body portion 26 b of a cylindrical body 26 in which many small holes 27 are formed. 2 to 3 layers of intermediate demister members 29 made of nonwoven fabric of about 3 to 5 mm and 3 to 4 layers of outer demister members 30 made of nonwoven fabric of mesh 100 μm and thickness of about 3 to 5 mm are wound so as to be sequentially stacked It is configured. Reference numerals 31 denote fixed bands attached to three locations on the outer side of the outer demister member 30. The filter 25 is a material capable of collecting and removing adhesive fume containing fine mist and oil components having a particle size of about 1 μm, which is the object of the present invention.

  The filter 25 is driven and rotated by the motor device 15 at 3600 revolutions per minute, but the rotation balance is appropriately adjusted by attaching a balance weight or the like.

  Reference numeral 35 denotes a water injection port opened in the body 2 a of the case body 2, and 36 denotes an on-off valve connected to the water injection port 35. A water injection means (not shown) is connected to the water injection port 35, and when tap water is used as cleaning water, it is provided so as to be connected to a water tap. About washing water, it provides so that the quantity of about 100-500cc / min may be dripped with respect to the outer surface of the filter 25 rotating from the water injection port 35. FIG.

  As described above, cleaning and drying of general workpieces and mineral light oil mist / water-soluble oil mist generated during cutting of parts in machine tools, fumes including oil components generated during arc welding in welding workshops, etc. Air including mist having a particle size of about 1 μm is sucked into the case 1 from the suction port 3 by rotating the turbo fan 20 at high speed by driving the motor device 15, and the mist in the sucked air is rotated. First, the clean air that has been removed by the filter 25 and has passed through the cylindrical body 26 from the small hole 27 of the filter 25 flows into the suction port 21 of the turbofan 20 and is discharged from the discharge port 10 of the fan casing 8 to the outside. A horizontal collection device A for mists according to the embodiment is configured.

(Experiment 1)
About the horizontal type | mold collection apparatus A of the mists of this invention, the experiment was conducted on the following conditions about the collection performance of the fine mist generated by spraying soft oil with an air pressure of 300 kPa.
Filter: outer diameter 150 mm x inner diameter 100 mm x length 150 mm
Filter rotation speed: 3600 rpm
Turbofan: air volume 6 m ³ / min, the vacuum pressure -1.2kPa
Motor device power: 1.5 kW

As a result of the experiment, the amount of oil mist measured at the discharge port of the turbofan was 0.12 mg / m ³ .

Embodiment 2
FIG. 3 shows a horizontal collection device B for mists according to the second embodiment. Since this collection device B has the same configuration as the horizontal collection device A of the mist of the first embodiment described above for the configuration other than the structure of the filter 45, the same configuration part as that of the collection device B The reference numerals used in the description of the device A are used as they are in the drawing, and the detailed description is omitted.

  In FIG. 3, the filter 45 is detachably provided at the peripheral edge 21 a of the suction port 21 of the turbofan 20 by tightening or loosening the base portion 46 a of the filter 45 with the bolt 32.

  The filter 45 includes a filter material 50 formed in a cylindrical shape through a filter reinforcing material 48 attached to a body portion 46b of a cylindrical body 46 in which a large number of small holes 47 are formed. Protection plates 51 and 52 are respectively addressed to both ends of 50, and they are fixed by an adhesive.

As shown in FIG. 4, the filter material 50 is formed in a cylindrical shape by connecting a large number of wrinkles in a concavo-convex shape with a nonwoven fabric having a mesh of about 10 μm, and the size is: outer diameter 200 to 500 mm, long The thickness is about 200 to 500 mm. The filter material 50 is a material capable of collecting and removing adhesive fume containing fine mist and oil components having a particle size of about 1 μm, which is the object of the present invention.

  Reference numeral 55 denotes a pressing member that also serves as a balancer for fixing the filter material 50. The filter member 50 is inserted after the rubber seal packing 53 is attached to the cylindrical body 46, and is passed through the center hole 56 of the presser member 55 in a state where the rubber seal packing 54 is addressed to the protective plate 51. The bolt 57 is attached to the cylindrical body 46 by screwing into the female thread portion 46 c of the cylindrical body 46.

  The filter member 50 can be easily removed from the cylindrical body 46 by loosening the bolts 57 and removing the pressing member 55 and then pulling the filter member 50.

  As described above, cleaning and drying of general workpieces and mineral light oil mist / water-soluble oil mist generated during cutting of parts in machine tools, fumes including oil components generated during arc welding in welding workshops, etc. Air including mist having a particle size of about 1 μm is sucked into the case 1 from the suction port 3 by rotating the turbo fan 20 at high speed by driving the motor device 15, and the mist in the sucked air is rotated. Clean air that has been removed by the filter 45 and passed through the cylindrical body 46 from the small hole 47 of the filter 45 flows into the suction port 21 of the turbofan 20 and is discharged from the discharge port 10 of the fan casing 8 to the outside. The horizontal collection apparatus B of mists concerning embodiment is comprised.

(Experiment 2)
About the horizontal type | mold collection apparatus B of mists of this invention, it experimented on the following conditions about the collection performance of the fine mist generated by spraying soft oil with an air pressure of 300 kPa.
Filter: Outer diameter 200 mm × Development area 1000 cm ²
, Non-woven fabric with 10μm mesh (chemical product)
Filter rotation speed: 3600 rpm
Turbofan: air volume 6 m ³ / min, the vacuum pressure -1.5kPa
Motor device power: 1.5 kW

As a result of the experiment, the amount of oil mist measured at the discharge port of the turbofan was 0.08 mg / m ³ .

  As described above, this mist collection device has a compact structure that removes the mist by passing the air containing the mist through a filter that rotates at high speed, and discharges the cleaned air to the outside. This eliminates the phenomenon that water droplets are discharged from the outlet of the fan casing, and enables the efficient collection and removal of adhesive fumes containing mist or oil with a particle size of about 1 μm. There is.

Vertical side view of a horizontal collection device for mist according to the first embodiment Mm expanded sectional view in FIG. Longitudinal side view of horizontal type mist collecting apparatus according to second embodiment Nn line enlarged sectional view in FIG.

Explanation of symbols

A ... Horizontal type collection device for mists (first embodiment)
DESCRIPTION OF SYMBOLS 1 ... Case 3 ... Suction port 2c ... (the other) opening end 8 ... Fan casing 10 ... Discharge port 15 ... Motor apparatus 18 ... Output shaft 20 ... Turbo Fan 21 ... Suction port 21a ... Peripheral part 26 ... Cylindrical body 26b ... Body part 25 ... Filter 27 ... Small hole 28 ... Inner demister member 29 ... Intermediate demister member 30 ... Outside demister member 35 ... Water inlet B ... Horizontal collection device for mists (second embodiment)
45 ... Filter 46 ... Tube 46b ... Body 47 ... Small hole 50 ... Filter material

Claims (4)

Air that is sucked into the case by arranging the output shaft of the motor device so that the air containing mist flows into the case, attaching a fan and a filter to the output shaft, and rotating the fan by the motor device In the mist collection device configured to remove the mist inside by a filter and discharge clean air to the outside,
A turbo fan as the fan is arranged in a fan casing provided so as to communicate with the opening end of the case, and the filter is detachably provided at a peripheral portion of the suction port of the turbo fan. The body part of the cylindrical body in which small holes are formed is composed of at least one layer of an inner demister member made of a nonwoven fabric having a mesh of 10 μm, two to three layers of intermediate demister members made of a nonwoven fabric having a mesh of 50 μm, and a nonwoven fabric having a mesh of 100 μm. The outer demister members of 3 to 4 layers are wound so as to be sequentially stacked, and air including mists is sucked into the case by rotating the turbofan at a high speed by the motor device, and in the sucked air The mist is removed by a rotating filter, and the air that has passed through the cylinder through the small hole in the filter is turbofan. By flowing the mist such collecting apparatus characterized by being configured to discharge to the outside from the discharge port of the fan casing. Air that is sucked into the case by arranging the output shaft of the motor device so that the air containing mist flows into the case, attaching a fan and a filter to the output shaft, and rotating the fan by the motor device In the mist collection device configured to remove the mist inside by a filter and discharge clean air to the outside,
A turbo fan as the fan is arranged in a fan casing provided so as to communicate with the opening end of the case, and the filter is detachably provided at a peripheral portion of the suction port of the turbo fan. A filter member in which a large number of wrinkles are connected in an uneven shape by a nonwoven fabric having a mesh of about 10 μm is mounted on the body of a cylindrical body in which small holes are formed. The air containing air is sucked into the case, mists in the sucked air are removed by a rotating filter, and the air that has passed through the cylinder through the small hole of the filter flows into the turbofan to discharge the fan casing. A device for collecting mists, wherein the device is configured to discharge from the outlet to the outside.   The mist collecting device according to claim 1, wherein the case and the output shaft are configured in a horizontal type with a horizontal orientation or a vertical type with a vertical orientation. The mist according to any one of claims 1 to 3, wherein the case is provided with a water injection port of water injection means, and the cleaning water is dripped onto the outer surface of the filter rotating from the water injection port. Kind of collection device.

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