JP2017185476A - Dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector which can efficiently separate and remove dust or the like without using a filter.SOLUTION: A dust collector is provided with: a main body which is formed in a cylindrical shape, has a straight body part having an approximately constant inner diameter from one end to the other end, is arranged obliquely with the other end side upward, and generates a rotation air flow inside by sucked air; an exhaust pipe which is arranged so as to pass through one end of the main body from a middle of an inside of the main body and extend to an external, and sucks air in the main body by a suction device; an introduction part which is arranged on the one end side of the main body and is connected with an introduction pipe for sucking the air in the main body from the external; and a supply nozzle which supplies a liquid to the inside of the main body.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a dust collector.

  When processing an object with a laser processing machine or the like, smoke and dust (hereinafter also referred to as “dust etc.”) are generated from the object along with the processing. Therefore, it is necessary to proceed while removing the dust and the like during the processing. Usually, in order to remove dust and the like, the generated dust and the like are sucked and the sucked air is passed through an air filter to capture the dust and the like.

  In Patent Document 1, air containing dust is taken in from a suction port provided on the side wall of the vortex chamber, and a swirl flow is generated in the vortex chamber to separate the dust, and is arranged at the central axis position of the vortex chamber. A dust collector that collects dust with a main filter is disclosed.

  In Patent Document 2, a cyclone type separation unit that swirls dust-containing air into dust and air, a shower unit that jets water toward the cyclone type separation unit, a waste liquid storage unit that stores waste liquid, Disclosed is a dust treatment apparatus comprising drain means for discharging waste liquid, filter means disposed in an inner cylinder of a cyclone separation means, and exhaust means for exhausting air filtered by the filter means. .

JP, 2015-120138, A Japanese Patent Laid-Open No. 2004-001118

  However, an air filter that filters dust or the like is easily clogged when the amount of generated dust or the like is large, or when viscous smoke is generated, and the suction force is likely to decrease. For this reason, the problem that the frequency of maintenance, such as filter replacement | exchange, becomes high arises.

  In recent years, in order to reduce the frequency of filter replacement, a method of filtering through an air flow containing dust or smoke using a bag-like filter (bag filter) made of cloth or nonwoven fabric has been used. In this method, the collection effect by the accumulated particles is greater than the collection by the filter itself. For this reason, when a certain time interval or pressure loss reaches a set value, it is necessary to remove the deposited particles. However, if highly viscous smoke or dust is attached, it cannot be removed sufficiently by the removal process.

  An object of this invention is to provide the dust collector which can isolate | separate and remove dust etc. efficiently without using a filter.

  In order to solve the above problems, the dust collector of the present invention is provided in a cylindrical shape, has a straight body portion having a substantially constant inner diameter from one end to the other end, and is disposed obliquely with the other end side facing up. A main body that generates a rotating air flow inside by the air to be sucked, and a part extending through the one end of the main body from the middle of the main body to the outside, and for sucking the air in the main body by the suction device An exhaust pipe, an introduction part provided on one end side of the main body and connected to an introduction pipe for sucking air into the main body from the outside, and a supply nozzle for supplying liquid into the main body To do.

  According to such a configuration, by sucking air into the main body, a rotating air flow is generated inside the main body, and smoke and dust contained in the air are centrifuged. Therefore, smoke and dust can be separated without using a filter that allows air to pass through, and the purified air can be discharged without pressure loss due to the filter. Furthermore, a liquid catcher that rotates along the inner wall surface of the main body is formed by using this rotating air current, and the smoke, dust, highly viscous dust, etc., can be efficiently captured by the liquid catcher.

  In the dust collector of the present invention, the radial gap between the main body and the exhaust pipe may be narrower than the inner diameter of the introduction pipe. Thereby, the flow path of the air flowing from the introduction pipe to the main body is narrowed, and the rotation speed of the rotating airflow generated outside the exhaust pipe is increased.

  In the dust collector of the present invention, the introduction pipe may be connected to the main body from obliquely upward to obliquely downward of the main body. Thereby, when a liquid rotates according to the rotation airflow of a main body, it can suppress that a liquid flows back into an introduction pipe.

  The dust collector of the present invention is provided in a cylindrical shape, and is provided with a main body that generates a rotating air flow inside by sucked air, and extends to the outside through one end of the main body from the middle of the main body. An inner cylinder, an outer cylinder provided outside the inner cylinder inside the main body, arranged substantially coaxially with the inner cylinder, and provided with a gap between the inner cylinder and the main body, and A supply nozzle that supplies liquid to the inside, a recovery unit that is provided below the main body and collects the liquid contained in the rotating airflow in the main body, is connected to the main body, and communicates with a gap between the outer cylinder and the main body inside the main body And a pipe to be provided. In this dust collector, one end of the outer cylinder on the collection unit side extends to the collection unit side rather than one end on the collection unit side of the inner cylinder, and a gap is formed between the other end of the outer cylinder and the outer peripheral surface of the inner cylinder. The other end of the inner cylinder extends from the main body to the outside.

  According to such a structure, since the collection | recovery part is integrated with the main body, an apparatus structure can be reduced in size. In addition, since the liquid is collected in the lower collection unit along the inner cylinder and the outer cylinder, piping such as a drain becomes unnecessary. As a result, the apparatus configuration can be simplified.

  According to the present invention, dust and the like can be efficiently separated and removed without using a filter.

It is a perspective view which shows the structural example of a processing machine. (A) And (b) is a figure which shows the detail of the dust collector which concerns on this embodiment. It is a schematic diagram illustrated about capture | acquisition of dust etc. by a rotating airflow and a liquid catcher. It is a schematic diagram illustrated about the circulation of a liquid. It is a schematic diagram illustrated about the connection of an exhaust pipe and a suction device. It is a schematic diagram which shows the example which incorporated the dust collector which concerns on this embodiment in the housing | casing. It is a schematic diagram which shows the example which incorporated the dust collector which concerns on this embodiment in the housing | casing. It is a schematic diagram which shows the other example which integrated the dust collector which concerns on this embodiment in the housing | casing. It is a schematic diagram which shows the other example which integrated the dust collector which concerns on this embodiment in the housing | casing. It is a schematic diagram which illustrates the angle of an introduction pipe. It is a perspective view which illustrates the dust collector concerning other embodiments. It is sectional drawing which illustrates the dust collector which concerns on other embodiment. (A) And (b) is sectional drawing which shows the example of an inlet. It is sectional drawing which shows the example of a dust collection nozzle.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same members are denoted by the same reference numerals, and the description of the members once described is omitted as appropriate.

(Processing machine configuration)
FIG. 1 is a perspective view illustrating a configuration example of a processing machine.
The dust collector 1 according to the present embodiment captures dust or the like generated from the object W processed by the processing machine 100. A processing machine 100 shown in FIG. 1 is a laser processing machine. The laser processing machine is a device that performs processing such as cutting of the object W using the energy of laser light.

  The processing machine 100 includes a processing machine main body 110, a stage 120, a laser emission head 130, a dust collection nozzle 140, a moving unit 150, and the dust collector 1 according to the present embodiment. Switches 111 are arranged on the front surface of the processing machine main body 110, and a power supply unit, a control circuit, a negative pressure pump, and the like (not shown) are incorporated therein. In the vicinity of the processing machine main body 110, input / output devices such as a display 115, a keyboard 116, and a mouse 117 are arranged so that various processing conditions can be set, read, stored, and controlled by a processing program.

  The stage 120 is disposed on the processing machine main body 110 and is movable in one direction (for example, the Y-axis direction). An object W is placed on the stage 120. The object W is adsorbed and fixed on the stage 120 by, for example, negative pressure.

  The moving unit 150 is configured in a gate shape, for example, and is disposed above the stage 120. A laser emission head 130 is attached to the moving unit 150. The laser emission head 130 can be moved in one direction (for example, the X-axis direction) by the moving unit 150. In the present embodiment, the moving unit 150 moves the laser emission head 130 in the X-axis direction and the stage 120 in the Y-axis direction, so that the relative positional relationship between the laser beam and the object W along the XY axis is determined. Although set, any one of the moving unit 150 and the stage 120 may be configured to be movable along the XY axes.

  The laser emission head 130 collects the laser beam by an optical system (not shown) and irradiates the object W. In the present embodiment, the laser emission head 130 can scan the irradiation range of the laser light by changing the irradiation angle of the laser light with a scan mirror. The laser emission head 130 is, for example, a galvano scanner head. The processing object W is made of various materials such as metal, resin, paper, and wood.

  The dust collection nozzle 140 sucks and collects dust generated from the object W when performing laser processing. In the present embodiment, the dust collection nozzle 140 includes a truncated cone-shaped hood that is disposed above the object W and surrounds the irradiation range of the laser light emitted from the laser emission head 130. The dust collection nozzle 140 is provided with a suction duct 145 to suck up dust collected by the dust collection nozzle 140 through the suction duct 145.

  The dust collector 1 according to the present embodiment is provided in the middle of a duct (passage between sucking dust and the like and sending it to the discharge device) that sucks and draws dust and the like. The dust collector 1 supplies a cylindrical main body 10, an exhaust pipe 30 extending from the inside of the main body 10 to the outside, and a liquid LQ for forming the liquid catcher 20 inside the main body 10. The nozzle 40, the collection | recovery part 50 which collect | recovers the liquid LQ, and the pump 60 which returns the liquid LQ from the collection | recovery part 50 to the supply nozzle 40 are provided. In addition, in the dust collector 1 shown in FIG. 1, the state which removed the cover of the main body 10 is shown for convenience of explanation.

  In order to process the object W with the processing machine 100, first, the object W is placed on the stage 120 and fixed by suction or the like. Next, when a processing procedure is set and executed by a predetermined program, the laser beam is irradiated from the laser emitting head 130 onto the object W, and the object W is processed (cutting, grooving, marking, etc.) by the energy of the laser beam. Is given. The irradiation position of the laser beam is controlled by scanning of the laser beam and the operations of the stage 120 and the moving unit 150 by a program process.

  A suction device (not shown) is connected to the subsequent stage of the dust collector 1. During the processing by the processing machine 100, dust or the like is sucked by the negative pressure generated by the suction device. That is, dust or the like generated from the object W by processing is collected by the dust collection nozzle 140 by this suction force and sent to the dust collector 1 of the present embodiment via the suction duct 145.

  In the dust collector 1, dust or the like sucked by the rotating airflow generated inside the main body 10 is centrifuged. Further, a liquid catcher 20 that rotates along the inner wall surface of the main body 10 is formed using this rotating air current, and the dust and the like that have been centrifuged are captured by the liquid catcher 20. The air from which dust or the like has been removed is discharged from the suction device through the exhaust pipe 30 through the exhaust duct 35.

(Details of dust collector)
2A and 2B are diagrams showing details of the dust collector according to the present embodiment.
FIG. 2A shows a perspective view of the dust collector 1 as viewed obliquely from above, and FIG. 2B shows a perspective view of the dust collector 1 as viewed from the side.

  The main body 10 of the dust collector 1 is configured in a cylindrical shape, for example. The main body 10 may be polygonal. The main body 10 has a straight body portion 11 having a substantially constant inner diameter. A lid 12 is detachably provided at the open end 11b of the straight body 11 (the other end of the main body 10). An introduction part 13 is provided at the rear end 11a of the straight body part 11 opposite to the opening end 11b. A suction duct 145 is connected to the introduction pipe 131 of the introduction part 13. In the present embodiment, two suction ducts 145 extending from the dust collection nozzle 140 are connected to the introduction pipe 131 of the introduction unit 13.

  The introduction pipe 131 extends in the tangential direction of the inner wall surface of the cylindrical main body 10. Each of the two introduction pipes 131 is provided to extend in the opposite direction at a position shifted from each other by 180 ° around the inner wall surface.

  The air sucked from the suction duct 145 is sent from the introduction pipe 131 to the introduction portion 13 and is drawn into the main body 10 while rotating here. The air rotated by the introduction unit 13 becomes a rotating airflow that advances while turning along the inner wall surface of the main body 10.

  For example, a supply nozzle 40 is provided in the introduction portion 13 of the main body 10. The supply nozzle 40 supplies the liquid LQ to the inside of the main body 10. When the liquid LQ is supplied from the supply nozzle 40 in a state where a rotating airflow is generated inside the main body 10, the liquid LQ spreads while rotating on the inner wall surface of the cylindrical main body 10 by the rotating airflow, and the liquid catcher 20 is configured. To do. The liquid catcher 20 rotates inside the main body 10 according to the rotating airflow.

  In this way, the rotating liquid LQ film is stretched inside the cylindrical main body 10, and dust and smoke having a high specific gravity are captured by the liquid catcher 20. It is desirable that the main body 10 is disposed slightly obliquely so that the opening side of the exhaust pipe 30 is on the upper side. A drain 42 is provided below the main body 10. The liquid LQ is recovered by the recovery unit 50 downstream from the drain 42. During the dust collection, the liquid LQ is continuously or intermittently supplied from the supply nozzle 40, and the liquid catcher 20 is configured together with the rotating airflow. A predetermined amount of the liquid LQ is recovered from the drain 42 to the recovery unit 50. Then, the liquid LQ is returned from the collection unit 50 to the supply nozzle 40 by the pump 60. As a result, the liquid LQ is circulated from the supply nozzle 40, the main body 10, the drain 42 to the recovery unit 50, and from the pump 60 to the supply nozzle 40.

  The liquid LQ supplied from the supply nozzle 40 may include at least one selected from VOC deodorant liquid, slightly acidic electrolyzed water, sodium hypochlorite water, and silver ion water in addition to water. Thereby, the odor generated by processing can be removed.

FIG. 3 is a schematic view illustrating the capture of dust and the like by the rotating airflow and the liquid catcher.
FIG. 4 is a schematic diagram illustrating the circulation of the liquid.
When air is drawn into the inside of the main body 10 from the introduction pipe 131 of the introduction portion 13, a rotating air current as shown by an arrow A is generated inside the main body 10. The dust contained in the air is centrifuged by this rotating airflow. Further, when the liquid LQ is supplied from the supply nozzle 40 into the main body 10, the liquid LQ is rotated by the rotating airflow, and the liquid catcher 20 is configured. The centrifugally separated dust or the like is captured by a liquid catcher 20 provided along the inner wall surface of the main body 10.

  Here, it is preferable that the supply nozzle 40 injects the liquid LQ along the arrow A which is the direction of the flow of the rotating airflow. Thereby, the liquid LQ can be efficiently diffused along the rotating airflow. Moreover, it is desirable that the size of the liquid LQ particles is set to a size that configures the liquid catcher 20 that rotates on the inner wall surface of the main body 10 by the rotating airflow. If the particles of the liquid LQ are too small, the effect of capturing dust and the like by the liquid catcher 20 cannot be obtained sufficiently. On the other hand, if the particles of the liquid LQ are too large, the effect of centrifugal separation such as dust caused by the rotating air current cannot be obtained sufficiently. Accordingly, an appropriate particle size of the liquid LQ is set depending on the internal volume of the main body 10 and the flow velocity of the rotating airflow.

  In the dust collector 1, a liquid air catcher 20 is generated by using a force that generates a rotating airflow inside the main body 10 and separates dust and the like separated to the outside by a centrifugal force generated by the rotating airflow on the inner wall surface side of the main body 10. Capture with. Then, as shown by an arrow B, the air from which dust or the like has been removed is discharged to the outside through the exhaust pipe 30 extending from the central portion to the outside in the middle of the main body 10.

  Further, when the liquid catcher 20 rotates in the main body 10, a part of the liquid LQ constituting the liquid catcher 20 is gradually discharged from the drain 42 provided below the main body 10 and accumulated in the recovery unit 50. The collection unit 50 is provided with a pump 60. The liquid LQ recovered by the recovery unit 50 by the pump 60 is returned to the supply nozzle 40. Thus, the liquid LQ can circulate and continuously form the liquid catcher 20 while collecting dust.

  In circulating the liquid LQ, it is desirable to provide a filter 70 between the pump 60 and the supply nozzle 40. The filter 70 includes, for example, a hollow fiber filter. The liquid LQ recovered by the recovery unit 50 includes dust and the like. By passing the filter 70, dust and the like contained in the liquid LQ can be removed, and the clean liquid LQ can be returned to the supply nozzle 40 to prevent clogging of the nozzle.

  Like the dust collector 1 according to the present embodiment, the liquid catcher 20 is formed in the main body 10 together with the rotating airflow, so that the liquid catcher 20 can centrifuge dust contained in the sucked air with the rotating airflow. Can be captured. Thereby, air can be discharged | emitted without receiving the pressure loss by a filter compared with the apparatus which collects dust through a filter, and the fall of dust collection efficiency can be suppressed. Further, when the air purified by the dust collecting action is discharged, moisture can be included in the air. Therefore, in this dust collector 1, the humidification effect can be obtained together with the dust collection effect. Further, the liquid catcher 20 allows even highly viscous smoke or dust to adhere to the liquid LQ and be effectively removed.

FIG. 5 is a schematic diagram illustrating the connection between the exhaust pipe and the suction device.
As shown in FIG. 5, the exhaust pipe 30 is extended by an exhaust duct 35, and a rear end opening 30a is provided at the rear end. The exhaust duct 35 is inserted into the collection unit 50, and the rear end opening 30 a is disposed inside the collection unit 50.

  On the other hand, the suction device 200 is provided with a suction port 200a for sucking air. The suction port 200 a is disposed inside the collection unit 50. In other words, the rear end opening 30a and the suction port 200a are arranged apart from each other in the collection unit 50.

  When suction is performed from the suction port 200a of the suction device 200 with such a configuration, the space provided in the upper part in the recovery unit 50 becomes negative pressure, and the rear end opening 30a disposed in the same space passes through the exhaust duct 35. Thus, the inside of the exhaust pipe 30 becomes negative pressure. Thereby, the air in the main body 10 is sucked from the opening of the exhaust pipe 30 arranged in the main body 10. Air including dust and the like is drawn from the dust collection nozzle 140 by this suction force. And in the main body 10, the liquid catcher 20 is comprised with a rotating airflow.

  In such a dust collecting operation, a part of the liquid LQ that rotates in the main body 10 as the liquid catcher 20 is mixed with the sucked air and sucked from the exhaust pipe 30. The air sucked from the exhaust pipe 30 is sent into the recovery unit 50 from the rear end opening 30a through the exhaust duct 35, and is drawn into the suction device 200 from the suction port 200a.

  At this time, since the rear end opening 30a and the suction port 200a are separated from each other in the recovery unit 50, the air is drawn into the suction port 200a from the rear end opening 30a. Thus, an air flow as shown by an arrow C in the figure is generated. The liquid LQ contained in the air sucked from the exhaust pipe 30 is separated by this air flow, and is swung down below the suction port 200a rather than the suction port 200a. As a result, the amount of the liquid LQ sucked from the suction port 200a can be suppressed.

6 and 7 are schematic views showing an example in which the dust collector according to the present embodiment is incorporated in a housing.
FIG. 6 shows a front view and FIG. 7 shows a side view. For convenience of explanation, the housing 500 is indicated by a two-dot chain line. In FIG. 6, the suction device 200 is omitted.
The main body 10 and the filter 70 are disposed on the top of the housing 500. In addition, the collection unit 50 is disposed at the bottom of the housing 500.

  The drain 42 extending from below the main body 10 is drawn into a collection unit 50 provided at the lower part of the housing 500. Further, the exhaust duct 35 extending from the exhaust pipe 30 is drawn into the lower collection unit 50 from the upper part of the housing 500.

  An opening 50a is provided in the upper part of the collection unit 50 provided in the housing 500, and the suction port 200a of the suction device 200 is connected to the opening 50a. Thereby, the air of the upper space of the collection | recovery part 50 can be drawn in from the suction opening 200a.

  A filter unit 220 is provided between the opening 50 a and the suction device 200. In this embodiment, since much dust etc. are captured by the liquid catcher 20, the amount of dust etc. drawn into the suction device 200 can be reduced. Therefore, the maintenance frequency of the filter unit 220 can be lowered.

  In the collection | recovery part 50, you may provide the separation plate 50b extended in the horizontal direction from the lower side of the opening part 50a. By providing the separation plate 50b, when air is sucked from the suction port 200a, the liquid LQ collected by the collecting unit 50 can be prevented from going directly to the opening 50a by suction force.

  Further, the rear end opening 30a of the exhaust duct 35 drawn into the collection unit 50 may be provided so as to face the side opposite to the opening 50a. For example, the rear end of the exhaust duct 35 is cut obliquely. Thereby, the direction of the rear end opening 30a is opposite to the opening 50a. Further, the direction of the rear end opening 30a does not face the liquid LQ side. By doing so, a long path is formed in the air flow from the rear end opening 30a toward the suction port 200a, and airflow is easily generated in the space above the collection unit 50. The liquid LQ contained in the air is separated by the air flow, the recovery rate of the liquid LQ in the recovery unit 50 is increased, and the amount of the liquid LQ sucked from the suction port 200a can be reduced.

  As described above, since the main body 10, the filter 70, and the collection unit 50 are incorporated in the housing 500, the dust collector 1 can be easily installed and moved. In addition, by arranging the filter 70 at a position where it can be seen from the outside and forming it with a translucent case, the degree of contamination of the filter 70 can be easily checked. Also, the filter 70 can be easily replaced. In addition, by providing the liquid supply port, the discharge drain, and the liquid level sensor in the recovery unit, it is possible to grasp the amount of liquid in the recovery unit and periodically exchange the liquid.

FIG. 8 and FIG. 9 are schematic views showing another example in which the dust collector is incorporated in the housing in the present embodiment.
FIG. 8 shows a front view, and FIG. 9 shows a side view. For convenience of explanation, the housing 500 is indicated by a two-dot chain line. In FIG. 8, the suction device 200 is omitted.
In this example, a discharge duct 38 that extends from above the collection unit 50 provided at the lower portion of the housing 500 to the outside of the housing 500 is provided. The discharge duct 38 is connected to the filter unit 220 of the suction device 200.

  The suction port 38a which is one end in the housing 500 of the discharge duct 38 may be provided obliquely. For example, the rear end of the discharge duct 38 is cut obliquely. The suction port 38a preferably opens in the direction opposite to the rear end opening 30a. A separation plate 50b may be provided below the suction port 38a.

  The height of the suction port 38a is preferably higher than the height of the rear end opening 30a. By doing so, a long path is formed in the air flow from the rear end opening 30a toward the suction port 38a, and airflow is easily generated in the space above the collection unit 50. The liquid LQ contained in the air is separated by the air flow, the recovery rate of the liquid LQ in the recovery unit 50 is increased, and the amount of the liquid LQ sucked from the suction port 38a can be reduced.

  In this example, since the collection unit 50 and the suction device 200 are connected by the discharge duct 38, the degree of freedom of arrangement of the suction device 200 is increased by routing the discharge duct 38.

(Introduction pipe angle)
Here, the angle of the introduction pipe 131 connected to the main body 10 will be described.
FIG. 10 is a schematic view illustrating the angle of the introduction pipe.
FIG. 10 shows a schematic view of the main body 10 as viewed from the front.
When the introduction pipe 131 is connected to the main body 10 from the side, the introduction pipe 131 may be disposed horizontally, but may be connected obliquely downward from above.

  In the example shown in FIG. 10, the introduction pipe 131 is connected to the main body 10 from obliquely upward to obliquely downward of the main body 10. That is, the introduction pipe 131 is inclined obliquely upward in a direction away from the connection position with the main body 10. When the connection angle of the introduction pipe 131 with respect to the horizontal is θ, θ is 5 ° or more and less than 90 °, preferably 5 ° or more and less than 45 °, more preferably 10 ° or more and less than 30 °.

  As described above, the introduction pipe 131 is connected to the main body 10 so as to be inclined, so that the liquid LQ can be prevented from flowing back to the introduction pipe 131 when the liquid LQ rotates in accordance with the rotating airflow of the main body 10. . That is, when the liquid LQ rotates in the main body 10, the liquid LQ is pressed outward by centrifugal force and tends to flow backward to the introduction pipe 131. In particular, when the suction duct 145 is connected to the introduction pipe 131 from below the main body 10, the liquid LQ easily enters the suction duct 145 when the liquid LQ flows backward through the introduction pipe 131. Even in such a configuration, it is possible to effectively prevent the rotating liquid LQ from flowing backward from the introduction pipe 131 to the suction duct 145 by inclining the introduction pipe 131 as described above.

(Other embodiments)
Next, another embodiment of the dust collector 1 will be described.
FIG. 11 is a perspective view illustrating a dust collector according to another embodiment.
FIG. 12 is a cross-sectional view illustrating a dust collector according to another embodiment.
For convenience of explanation, FIG. 11 shows a perspective view of the portion of the main body 10.

  In the dust collector 1 according to another embodiment, the collection unit 50 is provided on the side opposite to the exhaust pipe 30 inside the main body 10. That is, the collection unit 50 is integrated with the main body 10. Since the liquid LQ is recovered in the recovery unit 50, the main body 10 is disposed with the recovery unit 50 facing down.

  The exhaust pipe 30 has an inner cylinder 301 and an outer cylinder 302. The outer cylinder 302 is disposed outside the inner cylinder 301. The inner cylinder 301 and the outer cylinder 302 are disposed substantially coaxially, and a gap is provided between the outer peripheral surface of the inner cylinder 301 and the inner peripheral surface of the outer cylinder 302.

  One end 302a of the outer cylinder 302 on the collection unit 50 side extends to the collection unit 50 side than one end 301a of the inner cylinder 301 on the collection unit 50 side. A gap G is provided between the other end 302 b of the outer cylinder 302 and the outer peripheral surface 301 s of the inner cylinder 301. Furthermore, the other end 301 b of the inner cylinder 301 extends from the main body 10 to the outside.

  The supply nozzle 40 has a ring shape and is disposed along the outer peripheral surface 302 s of the inner cylinder 301 above the other end 302 b of the outer cylinder 302. A mesh 80 may be provided between the supply nozzle 40 and the gap G.

  A cylindrical inner wall 51 is provided in the collection unit 50 provided below the main body 10. The upper end 51 a of the inner wall 51 is higher than one end 302 a that is the lower end of the outer cylinder 302. That is, one end 302 a of the outer cylinder 302 is disposed so as to enter the inside of the cylinder of the inner wall 51. With such an inner wall 51, the height of the liquid LQ recovered by the recovery unit 50 reaches the upper end 51 a of the inner wall 51. As a result, the one end 302 a of the outer cylinder 302 is immersed in the liquid LQ inside the inner wall 51. On the other hand, one end 301 a which is the lower end of the inner cylinder 301 is disposed at a position higher than the upper end 51 a of the inner wall 51. Therefore, a gap is formed between the one end 301a of the inner cylinder 301 and the liquid LQ.

  In such a dust collecting apparatus 1, air containing dust or the like sucked from the dust collecting nozzle 140 is sucked up through the two suction ducts 145 and drawn into the main body 10 from the introduction pipe 131. Since each of the two introduction pipes 131 is attached at a position shifted from the main body 10 by 180 °, the air drawn into the main body 10 turns along the outer periphery of the outer cylinder 302 to become a rotating airflow.

  The air that has become a rotating air flow rises along the outer cylinder 302 and proceeds from the gap G to the gap between the inner cylinder 301 and the outer cylinder 302. The air that has advanced into the gap between the inner cylinder 301 and the outer cylinder 302 descends as a rotating airflow in this gap. Then, it enters the inside of the inner cylinder 301 from one end 301 a of the inner cylinder 301, rises again, and is discharged outside the main body 10.

  When the liquid LQ is supplied from the supply nozzle 40 in addition to such air suction, the liquid LQ is diffused into the rotating airflow outside the inner cylinder 301. When the mesh body 80 is provided, the liquid LQ is ejected from the supply nozzle 40 toward the mesh body 80, so that the liquid LQ is diffused when passing through the mesh body 80, and the liquid LQ is efficiently converted into the rotating airflow. LQ can be included. Since the liquid is always ejected from the upper part of the net-like body, it is equivalent to a state where it is always washed, and clogging is unlikely to occur.

  The liquid LQ is included in the rotating airflow generated in the gap between the inner tube 301 and the outer tube 302 as well as the rotating airflow generated outside the outer tube 302. Therefore, two liquid catchers 20 are configured in the main body 10 in accordance with these rotating airflows. Then, dust or the like centrifuged by the rotating air current is captured by the liquid LQ of the liquid catcher 20. The liquid LQ that captures the dust and the like is gradually recovered by the recovery unit 50 below the main body 10. Then, the liquid LQ accumulated in the recovery unit 50 is sent to the filter 70 by the pump 60, filtered, and then returned to the supply nozzle 40 again.

  According to such a dust collector 1, since the collection | recovery part 50 is integrated with the main body 10, an apparatus structure can be reduced in size. Further, since the liquid LQ is collected in the lower collection unit 50 along the inner cylinder 301 and the outer cylinder 302, piping such as the drain 42 is not necessary. As a result, the apparatus configuration can be simplified.

(Introduction port)
FIGS. 13A and 13B are cross-sectional views showing the inlet.
When air flows into the main body 10 from the introduction pipe 131, the rotational speed of the rotating airflow can be increased by increasing the air flow rate.

  In the example shown in FIG. 13A, the diameter of the exhaust pipe 30 is made larger so that the gap d2 between the exhaust pipe 30 and the main body 10 becomes narrower than the inner diameter d1 of the introduction pipe 131 of the main body 10. Thereby, the flow path of the air flowing from the introduction pipe 131 to the main body 10 is narrowed, and the rotation speed of the rotating airflow generated outside the exhaust pipe 30 is increased.

  In the example shown in FIG. 13B, a plate 132 is provided on the inlet side of the main body 10 of the introduction pipe 131. The flow path of the air flowing from the introduction pipe 131 to the main body 10 is gradually narrowed by the plate 132, and the rotational speed of the rotating airflow can be increased by increasing the flow velocity of the air when entering the main body 10.

  In any example, the efficiency of the centrifugation can be improved by increasing the rotational speed of the rotating airflow generated in the main body 10.

(Dust collecting nozzle)
FIG. 14 is a cross-sectional view illustrating an example of a dust collection nozzle.
The inventor of the present application has created a dust collection nozzle 140 shown in FIG. 14 and has reached a patent (Japanese Patent No. 5729739).

  That is, the dust collection nozzle 140 has a rotationally symmetric shape that can surround the laser beam emitted from the laser emission head 130. The dust collection nozzle 140 surrounds a conical space 23 necessary for forming the laser light scanning area 21.

  A gap 31 is provided between the lower edge 29 of the dust collection nozzle 140 and the object W, and ambient air is supplied into the dust collection nozzle 140. In addition, a compressed air supply port 33 is connected to the lower end of the dust collection nozzle 140, and the compressed air is supplied into the dust collection nozzle 140, thereby causing a swirling flow in the dust collection nozzle 140.

  A suction duct 145 is connected to the skirt portion 25 of the dust collection nozzle 140. The suction duct 145 is connected in a tangential direction in the horizontal cross section of the skirt portion 25, and exhausts by the negative pressure of a suction pump communicating with a bellows tube (not shown). As a result, a swirl flow 36 is generated in the dust collection nozzle 140.

  According to this dust collection nozzle 140, the air 41 supplied into the dust collection nozzle 140 from the gap 31 provided between the lower edge 29 of the dust collection nozzle 140 and the object W, and the dust collection nozzle 140 The air supplied into the dust collection nozzle 140 from the compressed air supply port 33 at the lower end almost entrains the air in the vicinity of the laser processing site, becomes an upward flow, and swirls along the rotationally symmetric shape of the dust collection nozzle 140. 36, and is exhausted through the suction duct 145 in the tangential direction of the rotationally symmetric shape. Further, the air 45 supplied from the gap 32 between the upper edge of the elevating unit 27 and the laser emitting head 130 becomes a downward flow, joins the swirling flow 36, and is exhausted through the suction duct 145.

  By using such a dust collection nozzle 140, dust and the like during processing in the processing machine 100 can be sucked efficiently. When the dust collection nozzle 140 having such a high suction efficiency is used, a filter with a normal filter causes clogging of the filter in a short time. Therefore, by applying the dust collector 1 according to the present embodiment, effective dust collection can be realized without causing clogging from efficient suction of dust and the like. Further, since the dust collection nozzle 140 is sucked by the two suction ducts 145, the two suction ducts 145 can be connected to the two introduction pipes 131 of the dust collector 1 on a one-to-one basis. For this reason, the dust collection nozzle 140 and the dust collection apparatus 1 are excellent in mutual connection matching.

  As described above, according to the dust collector 1 according to the embodiment, dust or the like can be efficiently separated and removed without using a filter.

  In addition, although this embodiment and its specific example were demonstrated above, this invention is not limited to these examples. For example, although an example in which two introduction pipes 131 are attached to the main body 10 in the dust collector 1, one or three or more introduction pipes 131 may be attached to the main body 10. Further, the laser emission head 130 may be provided in a multi-joint arm in addition to being provided in the moving unit 150 that moves in the uniaxial direction. Moreover, you may comprise a dust collection system with higher dust collection efficiency by arrange | positioning the several dust collector 1 in parallel or in series. Further, those in which those skilled in the art appropriately added, deleted, and changed the design of the above-described embodiments or specific examples thereof, and combinations of the features of each embodiment as appropriate are also included in the present invention. As long as the gist is provided, it is included in the scope of the present invention.

  As described above, the dust collecting apparatus 1 of the present invention includes a processing machine 100 other than a laser processing machine, for example, a laser welding machine, a heating device using laser or energy other than laser, a cutting device using a blade, and a three-dimensional modeling device. The present invention can be suitably used for a processing machine 100 that generates smoke or dust during processing, such as (3D printer). In addition to the processing machine 100, the dust collector 1 can also be used as a dust collector (air purifier) and a humidifier for collecting air by sucking indoor or outdoor air in a factory or the like. Is possible.

DESCRIPTION OF SYMBOLS 1 ... Dust collector 10 ... Main body 11 ... Straight trunk | drum 12 ... Cover 13 ... Introduction part 20 ... Liquid catcher 30 ... Exhaust pipe 30a ... Rear end opening 35 ... Exhaust duct 36 ... Swirling flow 38 ... Exhaust duct 38a ... Suction port 40 ... Supply nozzle 42 ... Drain 50 ... Recovery part 50a ... Opening 50b ... Separation plate 51 ... Inner wall 51a ... Upper end 60 ... Pump 70 ... Filter 80 ... Mesh body 100 ... Processing machine 110 ... Processing machine body 111 ... Switches 115 ... Display 116 ... Keyboard 117 ... Mouse 120 ... Stage 130 ... Laser emission head 131 ... Introducing pipe 140 ... Dust collection nozzle 145 ... Suction duct 150 ... Moving unit 200 ... Suction device 200a ... Suction port 220 ... Filter unit 301 ... Inner cylinder 301a ... One end 301b ... the other end 301s ... the outer peripheral surface 302 ... the outer cylinder 302a ... one end 302b ... the other end 302s The outer peripheral surface 500 ... housing LQ ... Liquid W ... object

Claims (4)

A main body that is provided in a cylindrical shape, has a straight body portion having a substantially constant inner diameter from one end to the other end, is disposed obliquely with the other end side facing up, and generates a rotating airflow inside by sucked air When,
An exhaust pipe for inhaling air in the main body by a suction device, provided to extend from the middle of the main body to the outside through the one end of the main body,
An introduction part provided on the one end side of the main body and connected to an introduction pipe for sucking air into the main body from the outside;
A supply nozzle for supplying liquid into the body;
A dust collector characterized by comprising:   The dust collector according to claim 1, wherein a radial gap between the main body and the exhaust pipe is narrower than an inner diameter of the introduction pipe.   The dust collector according to claim 1 or 2, wherein the introduction pipe is connected to the main body from obliquely upward to obliquely downward of the main body. A main body that is provided in a cylindrical shape and generates a rotating airflow inside by sucked air;
An inner cylinder provided so as to pass through one end of the main body from the middle of the main body and extend to the outside;
An outer cylinder provided outside the inner cylinder inside the main body, arranged substantially coaxially with the inner cylinder, and provided with a gap between the inner cylinder and the main body;
A supply nozzle for supplying liquid into the body;
A recovery unit that is provided below the main body and recovers the liquid contained in the rotating airflow in the main body;
A pipe connected to the main body and communicating with a gap between the outer cylinder and the main body inside the main body;
With
One end of the outer cylinder on the collection unit side extends to the collection unit side than one end of the inner cylinder on the collection unit side,
A gap is provided between the other end of the outer cylinder and the outer peripheral surface of the inner cylinder,
The other end of the inner cylinder extends to the outside from the main body.