JP2018140328A - Cyclone type dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cyclone type dust collector having higher dust collection efficiency than conventional one.SOLUTION: A cyclone type dust collector 10 includes a nozzle assembly part 50 in which a plurality of nozzles 22 are arranged in a longitudinal cross section 16A of a spiral flow passage 16, and the nozzles 22 can spray water mist to approximately the whole of the common longitudinal cross section 16A of the spiral flow passage 16 by sharing. Thereby, the cyclone type dust collector 10 can suppress an amount of air passing through the nozzle 22 without receiving the water mist compared to conventional one in which the plurality of nozzles 22 are dispersed and arranged with a fixed pattern along the spiral flow passage 16, and a mixing rate of particles that are objects to be removed and particles of the water mist in the air is high. The particles that are objects to be removed and particles of the water mist are easily united with each other, and dust collection efficiency is further improved more than the conventional one.SELECTED DRAWING: Figure 1

Description

  The present invention includes a spiral flow path partitioned by a spiral guide in a cylindrical case and a nozzle for spraying water mist, and the particles to be removed contained in the air passing through the spiral flow path are water mist. The present invention relates to a cyclone type dust collecting device that combines and collects and collects on an inner surface of a cylindrical case by centrifugal force.

  Conventionally, as this type of cyclone type dust collector, one in which a plurality of nozzles are dispersedly arranged in a fixed pattern along a spiral flow path is known (for example, see Patent Document 1).

Japanese Patent Laying-Open No. 2015-20129 (see FIG. 2)

  However, in the above-described cyclone type dust collector, dust collection efficiency is not sufficient, and improvement thereof has been demanded.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cyclone type dust collector that has higher dust collection efficiency than conventional ones.

  In order to achieve the above object, the invention of claim 1 is provided with a spiral flow path partitioned by a spiral guide and a nozzle for spraying water mist in a cylindrical case. A surface including the central axis of the cylindrical case in a cyclone type dust collector that collects particles to be removed contained in the passing air with the water mist and collects and collects the particles on the inner surface of the cylindrical case by centrifugal force And a plurality of the nozzles are arranged in a vertical cross section in which a part of the spiral flow path intersects, and a nozzle assembly for spraying the water mist from the nozzles in the vertical cross section is provided. Cyclone type dust collector.

  The invention of claim 2 is provided with a partition member for partitioning the longitudinal section into a plurality of divided regions, and the plurality of nozzles of the nozzle assembly portion are attached to the partition member and directed to each of the plurality of divided regions. The cyclone dust collector according to claim 1, wherein the water mist is sprayed.

  According to a third aspect of the present invention, a center member extending along a central portion of the cylindrical case is provided, and the partition member is interposed between the center member and an inner surface of the cylindrical case, and the nozzle The cyclone type dust collector according to claim 2, wherein the plurality of nozzles of the collecting portion are collected at a substantially central position in a longitudinal direction of the partition member and spray the water mist radially from the substantially central position. is there.

  A fourth aspect of the present invention is the cyclonic dust collector according to any one of the first to third aspects, wherein the nozzle collecting portion is disposed at an upstream end portion of the helical flow path. .

  The invention according to claim 5 is the cyclone according to any one of claims 1 to 4, wherein all of the plurality of nozzles in the cylindrical case are unevenly distributed upstream of the spiral flow path. Type dust collector.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the nozzle assembly portion of the helical flow path is a throttle portion having a smaller air passage area than other portions. Cyclone type dust collector.

[Invention of Claim 1]
In the cyclone type dust collector of Claim 1, the nozzle assembly part which arrange | positions several nozzles in the longitudinal cross-section of a helical flow path is provided, and these nozzles share and the common longitudinal cross-section of a helical flow path Water mist is sprayed on almost the entire surface. This makes it possible to suppress the amount of air passing through the nozzle without receiving water mist, compared to the conventional one in which a plurality of nozzles are distributed and arranged in a fixed pattern along the spiral flow path. The mixing ratio of the particles to be removed and the water mist particles increases. And removal object particle | grains and water mist particle | grains unite | combine easily, and the dust collection efficiency of removal object particle | grains improves conventionally.

[Inventions of Claims 2 and 3]
In the cyclone type dust collector according to claim 2, since the partition member that divides the longitudinal section of the spiral flow path into a plurality of divided regions is provided, each nozzle in charge of spraying in the longitudinal section of the spiral flow path The divided area to be clarified. Moreover, since the turbulent flow is easily generated by the partition member, the mixing of the removal target particles and the water mist particles proceeds and the coalescence progresses, and the dust collection efficiency of the removal target particles is improved as compared with the conventional case.

[Invention of claim 4]
In the cyclone type dust collector according to the fourth aspect, the upstream end of the spiral flow path is disposed, and the water mist and the particles to be removed are mixed at an initial stage when air passes through the spiral flow path. Thereby, the dust collection efficiency of the removal target particles is improved.

[Invention of claim 5]
According to the structure of Claim 5, since all the several nozzles in a cylindrical case are unevenly distributed in the upstream of a helical flow path, discharge | release of water mist out of a cyclone type dust collector is suppressed. . Thereby, corrosion and water leakage of the duct and the exhaust fan arranged in the discharge path of the air discharged from the cyclone type dust collector can be suppressed.

[Invention of claim 6]
In the cyclone type dust collecting apparatus according to the sixth aspect, the throttle part is provided in the spiral flow path, and water mist is sprayed on the air passing through the throttle part. That is, water mist is sprayed where the air passage area is reduced. This further improves the dust collection efficiency of the particles to be removed.

The perspective view of the cyclone type dust collector which concerns on 1st Embodiment of this invention. Perspective view of the diaphragm forming member Partially enlarged perspective view of nozzle assembly The perspective view of the aperture | diaphragm | squeeze part formation member of 2nd Embodiment. The perspective view of the aperture part forming member of 3rd Embodiment The perspective view of the aperture part forming member of 4th Embodiment Side sectional view of a throttle forming member of a fifth embodiment (A) 1st distribution map of particle 1 concerning execution product 1, (B) 2nd distribution map of particle 2 (A) 1st distribution map of particle 1 concerning comparative product 1, (B) 2nd distribution map of particle 2

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The cyclone dust collector 10 of this embodiment is used for purifying air discharged from a painting booth (not shown). In the painting booth, a painting robot sprays a mist-like paint (hereinafter referred to as “paint mist”) toward the work. The ceiling of the painting booth is mesh-like and the floor is like a kite. Furthermore, the floor is partitioned vertically by an intermediate plate having a plurality of through holes, and water is stretched on the intermediate plate. Then, the air flowing down from the whole ceiling flows under the floor together with the unpainted paint mist, a part of the paint mist is caught by the water on the intermediate plate, and the air containing the paint mist other than the part of the paint mist It is discharged from the lower room to the exhaust / drain duct 11 extending substantially horizontally. Further, the water on the intermediate plate also overflows from the through hole and flows into the exhaust and drainage duct 11 below.

  As shown in FIG. 1, the cyclone dust collector 10 of the present embodiment includes a cylindrical cylindrical case 12 that stands on an end portion of an exhaust / drainage duct 11. The lower end of the cylindrical case 12 is open and communicates with the exhaust / drain duct 11. An annular inward flange 13 projecting inward is provided at the upper end of the cylindrical case 12, and the inside of the inward flange 13 is an exhaust port 13 </ b> A of the cyclone type dust collector 10. Then, the air containing the paint mist flows into the cylindrical case 12 from the lower end, and the paint mist is removed and escapes from the upper exhaust port 13A. In the present embodiment, the paint mist particles contained in the air correspond to “removal target particles” according to the present invention.

  A center pipe 14A (corresponding to the “center member” of the present invention) is provided at the center of the cylindrical case 12. The center pipe 14A extends from the lower end portion of the cylindrical case 12 to a position near the upper end and is closed at the upper end portion. Further, a water distribution pipe 14B passes through a position near the upper end of one side surface of the exhaust and drainage duct 11, and a distal end portion of the water distribution pipe 14B is connected to a lower end portion of the center pipe 14A. Then, water is supplied from a pump (not shown) to the center pipe 14A through the water distribution pipe 14B.

  The cylindrical case 12 houses a spiral guide 15. The spiral guide 15 is wound around the center pipe 14A, for example, approximately two and a half turns. And the outer edge part of the spiral guide 15 contact | abuts to the inner surface of the cylindrical case 12, and the helical flow path 16 is formed in the cylindrical case 12. FIG. Further, the upper end edge 15 </ b> A of the spiral guide 15 is disposed near the upper end of the cylindrical case 12. The lower edge portion 15B of one spiral guide 15 is located in the opening surface of the lower surface of the cylindrical case 12, and extends in the direction perpendicular to the air flow direction (that is, the width direction) in the exhaust / drainage duct 11. ing. Further, the lower portion of the spiral guide 15 is inclined so as to gradually rise from the lower edge portion 15B in the air flow direction of the exhaust / drainage duct 11.

  A throttle forming member 20 is attached to the lower end of the spiral channel 16. The throttle forming member 20 has a support frame 17 fitted into the lower end of the spiral flow path 16. Specifically, the support frame body is provided in a vertical cross section 16 </ b> A in which a surface including the central axis J <b> 1 of the cylindrical case 12 and the lower edge portion 15 </ b> B of the spiral guide 15 intersects the lower end portion of the spiral flow path 16. 17 is arranged.

  As shown in FIG. 2, the support frame 17 has a pair of leg portions 17B, 17B extending in the vertical direction along both side edges of the longitudinal section 16A between the upper edges of the longitudinal section 16A. The upper end bridging portion 17A extending along the upper and lower ends and the pair of leg portions 17B and 17B are connected to each other by a partition member 17C between the substantially central portions in the vertical direction. One leg 17B is fixed to the center pipe 14A with a screw, while the other leg 17B is fixed to the cylindrical case 12 with a screw. The upper bridge portion 17A is in contact with the lower surface of the upper spiral guide 15. Furthermore, the longitudinal section 16A is partitioned into a pair of divided regions 51A and 51B by the partition member 17C. In addition, the screw hole for fixing the leg portion 17B in the center pipe 14A is formed so as not to penetrate or is sealed with a sealing material.

  Triangular ribs 18 and 18 are fixed to both upper corners of the support frame 17. The starting end portion of the spiral flow path 16 is narrowed by the support frame body 17 and the triangular ribs 18 and 18 to form a narrowed portion 19.

  In the central portion of the partition member 17C in the longitudinal direction, four nozzles 22 for spraying water mist radially in the throttle portion 19 are provided, and a nozzle assembly portion 50 is formed. Specifically, as shown in FIG. 3, for example, the partition member 17C is formed with a pair of through holes 21A, 21A inclined at 45 degrees with respect to the vertical direction so as to be orthogonal to each other. And the nozzle 22 for spraying is screwed in the both ends of these through-holes 21A and 21A. A communication hole 21B is formed from the intersection of the through holes 21A and 21A to the rear surface of the partition member 17C, and an elbow joint 23 is attached to the rear end opening of the communication hole 21B. Furthermore, as shown in FIG. 2, a through hole is formed at a position facing the elbow joint 23 in the center pipe 14A, and a straight joint 24 is attached thereto. The elbow joint 23 and the straight joint 24 are connected by a pipe P. Thereby, water is shared from the center pipe 14A to the four nozzles 22, and a water mist, that is, a water mist is sprayed radially.

  In the center pipe 14A, a position where the 90 degree winding has advanced from the throttle portion 19 along the spiral flow path 16, a position where the 180 degree winding has further advanced from that position, and a 180 degree winding has further advanced from that position. A through hole is formed at a center position between the upper and lower spiral guides 15 and the nozzle 30 is screwed into the three positions. Further, a through hole is formed in the rear portion of one triangular rib 18 in the center pipe 14A, and the nozzle 30 is screwed there. Then, water in the center pipe 14 </ b> A is sprayed from each nozzle 30 toward the inner surface of the cylindrical case 12.

  This completes the description of the configuration of the cyclonic dust collector 10 of the present embodiment. Next, the effect of this cyclone type dust collector 10 is demonstrated. The air containing the paint mist discharged from the painting booth flows into the cylindrical case 12 of the cyclone type dust collector 10 through the exhaust / drain duct 11. Then, water mist is sprayed with respect to the air in the cylindrical case 12, and the air containing the water mist and the paint mist rises while swirling along the spiral flow path 16. Due to the centrifugal force of the swirling, particles other than gas molecules in the air are collected on the inner side surface of the cylindrical case 12. In addition, the heavier the particles are, the larger the centrifugal force is received and the closer the inner surface of the cylindrical case 12 is. Therefore, in order to remove the paint mist, it is preferable that the paint mist particles and the water mist particles are combined and enlarged.

  Here, when the cyclone type dust collector 10 has a structure similar to the conventional structure in which a plurality of nozzles are dispersedly arranged in a certain pattern along the spiral flow path 16, the water mist particles do not spread over the entire air, Do not mix well with paint mist. Further, since the air is in a laminar flow state in the spiral channel 16, the separated paint mist and water mist are not sufficiently mixed even if they move downstream. Therefore, coalescence of the paint mist particles and the water mist particles does not proceed, and the dust collection efficiency of the paint mist is lowered.

  On the other hand, the cyclonic dust collector 10 of the present embodiment includes a throttle portion forming member 20 and a nozzle assembly portion 50. As shown in FIG. 2, the longitudinal section 16A is vertically divided into two divided regions 51A and 51B by the partition member 17C of the throttle portion forming member 20, and the four nozzles 22 constituting the nozzle assembly portion 50 are located on the upper side. The divided area 51A is divided into a substantially half area on the left side and a substantially half area on the right side, and a substantially half area on the left side and a substantially half area on the right side of the lower divided area 51B, and water mist is sprayed on each area. To do. That is, the plurality of nozzles 22 can share and spray the water mist on substantially the entire common longitudinal section 16 </ b> A of the spiral channel 16. This makes it possible to suppress the amount of air passing through the nozzle without receiving water mist, compared to the conventional one in which a plurality of nozzles are dispersedly arranged in a fixed pattern along the spiral flow path 16. The mixing ratio of the removal target particles and the water mist particles can be increased.

  The nozzle assembly 50 is disposed at the upstream end of the spiral channel 16, and water mist and paint mist are mixed at an initial stage when air passes through the spiral channel 16. Further, the provision of the throttle portion forming member 20 makes the air turbulent and easily mixed. Further, the longitudinal section 16A of the spiral channel 16 is narrowed by the throttle portion forming member 20 to form the throttle portion 19, and the air passage area is smaller than that of the other portions. It becomes easy to spread throughout. In addition, according to the simulation as described later, water mist hardly spreads at the corners of the spiral flow channel 16, but by arranging the triangular ribs 18 and 18 at the corners of the longitudinal section 16A, It is possible to efficiently increase the mixing ratio between the paint mist particles and the water mist particles by reducing the sites where the water mist is difficult to reach.

  Thus, according to the cyclone type dust collecting apparatus 10 of the present embodiment, the mixing ratio of the particles of the paint mist and the water mist is increased, and the removal target particles and the water mist particles are easily combined and removed. The dust collection efficiency of the target particles is improved compared to the past.

  Moreover, since the whole of the plurality of nozzles 22 and 30 in the cylindrical case 12 is unevenly distributed upstream of the spiral flow path 16, the discharge of water mist to the outside of the cyclone dust collector 10 can be suppressed. Thereby, corrosion and water leakage of the duct and the exhaust fan arranged in the discharge path of the air discharged from the cyclone dust collector 10 can be suppressed. Furthermore, in this cyclone type dust collector 10, the inside of the throttle part forming member 20 can be removed and the inside can be easily cleaned.

  In addition, a part of the air discharged from the exhaust port 13A of the cyclone type dust collector 10 is discharged to the atmosphere, and the rest is supplied to the painting booth after humidity and temperature are adjusted by a known facility and reused. Is done. Further, the water discharged from the painting booth to the exhaust / drainage duct 11 is purified by known equipment and supplied to the painting booth, or supplied from the water distribution pipe 14B to the center pipe 14A for reuse. .

[Second Embodiment]
This embodiment is shown in FIG. 4, and the triangular ribs 18 and 18 are excluded from the throttle forming member 20 of the first embodiment, and a plurality of nozzles 22 are provided on the upper and lower surfaces of the partition member 17C, respectively. Thus, the nozzle assembly portion 50V is formed. The plurality of nozzles 22 on the upper surface of the partition member 17C spray water mist upward, while the plurality of nozzles 22 on the lower surface of the partition member 17C spray water mist downward. The configuration of the present embodiment also provides the same operational effects as the first embodiment.

[Third Embodiment]
This embodiment is shown in FIG. 5 (A). The partition member 17C is excluded from the second embodiment, and a plurality of nozzles 22 are arranged in a vertical row on the opposing surfaces of the pair of leg portions 17B and 17B. These nozzles 22 constitute a nozzle assembly portion 50W. And these nozzles 22 spray water mist in the opposing direction of the leg parts 17B and 17B. The configuration of the present embodiment also provides the same operational effects as the first embodiment.

  Instead of arranging the plurality of nozzles 22 on the legs 17B and 17B of the support frame 17 as described above, a plurality of nozzles are provided on the upper bridge portion 17A of the support frame 17 as shown in FIG. 22 may be arranged so that the water mist is sprayed only from above on the spiral flow path 16.

[Fourth Embodiment]
This embodiment is shown in FIG. 6, and a plate member 40 having substantially the same shape as the longitudinal section 16 </ b> A of the spiral flow channel 16 is fixed to the support frame body 17 instead of the triangular rib 18 of the first embodiment. Has been. A center hole 40A is formed at the center of the plate member 40, and the nozzle 22 is arranged at the center of the center hole 40A. The configuration of the present embodiment also provides the same operational effects as the first embodiment.

[Fifth Embodiment]
This embodiment is shown in FIG. 7, and a funnel member 41 is attached to the support frame body 17 instead of the plate member 40 of the fourth embodiment. The funnel member 41 has a shape in which the plate member 40 of the fourth embodiment is bent in a funnel shape. Further, a partition member 17D is attached so as to cross the center hole 41A of the funnel member 41, and the partition member 17D is provided with a plurality of nozzles 22 as in the first embodiment. The configuration of this embodiment also provides the same operational effects as those of the first and second embodiments.

[Example]
Experiments were performed in the simulator as follows.

A. Experimental Method (1) A device obtained by eliminating all the nozzles 30 from the cyclone dust collector 10 of the first embodiment described above was set as a product 1 of the present invention in the simulator.

(2) The throttle part forming member 20 and the nozzles 22 of the nozzle assembly part 50 and the nozzles 30 on the rear side of the triangular ribs 18 are excluded from the cyclone dust collector 10 of the first embodiment described above, and the remaining three nozzles 30 are removed. The starting end position of the spiral channel 16 where the nozzle 22 is disposed, the position rotated 180 degrees along the spiral channel 16 from the starting end position, and further along the spiral channel 16 from that position. A device in which the nozzle 30 was arranged at a position rotated by 180 degrees was set as a comparative product 1 in the simulator.

(3) While paint mist particles were particles 1, water mist particles were particles 2, and their sizes and specific gravity were set in the simulator as follows.
Particle 1: Diameter 30-40 [μm], specific gravity 1
Particle 2: diameter 30-40 [μm], specific gravity 1

(4) When the air in which the particles 1 are evenly distributed flows into the product 1 at a predetermined first wind speed, a distribution diagram of the particles 1 in a predetermined vertical section of the entire cylindrical case 12 is a first distribution diagram. It was determined (FIG. 8A).

(5) The predetermined longitudinal section of the entire cylindrical case 12 when the particles 2 are sprayed from the nozzle of the implementation product 1 in a state in which the air that does not contain the particles 1 flows into the implementation product 1 at the first wind speed. The distribution map of the particles 2 on the surface was obtained as the second distribution map (FIG. 8B).

(6) Based on the first distribution chart and the second distribution chart, the ratio of the area of the area where there is paint mist and no water mist in the predetermined cross section of the entire cylindrical case 12 of the embodiment product 1 is the non-mixing ratio. As the mixing ratio, 100% was obtained by subtracting the non-mixing ratio.

(7) For the comparative product 1 as well, the first distribution chart (FIG. 9A), the second distribution chart (FIG. 9B), and the mixing ratio were obtained in the same manner.

B. Experimental result The mixing ratio of the paint mist and water mist of the execution product 1 was 91.2 [%], and the mixing ratio of the paint mist and water mist of the comparative product 1 was 75.6 [%]. . From this, according to this invention, it can confirm that the mixing rate of the particle | grains of the paint mist and water mist contained in air becomes high. And it can be inferred that the mixing ratio of the paint mist particles and the water mist particles becomes high, so that they are easily combined, and the dust collection efficiency of the paint mist is improved as compared with the prior art.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) Although the cylindrical case 12 of the cyclonic dust collector 10 of the first embodiment has a circular cross section, it may be a polygonal or elliptical cross section.

(2) In the cylindrical case 12 of the cyclonic dust collector 10 of the first embodiment, the central axis J1 extends in the vertical direction, but the central axis may be horizontal or inclined in the horizontal direction. You may do it.

(3) Although the partition member 17C of the first and second embodiments extends in the horizontal direction, the partition member 17C extends in the vertical direction, and a plurality of nozzles 22 are provided on both sides in the horizontal direction. It is good also as a structure provided.

(4) In the first and second embodiments, the partition member 17C divides the longitudinal section 16A into two. However, the longitudinal section 16A is divided into three or more divided areas, and nozzles are provided in each divided area. 22 may be configured to spray water mist.

(5) Although the partition member 17C of the first and second embodiments has a double-supported beam structure, it may be a cantilever structure. Specifically, for example, a structure in which a plurality of nozzles 22 are provided on the upper and lower surfaces of a branch pipe that branches off from the water distribution pipe 14B and extends in a cantilever shape may be adopted.

(6) Moreover, as a structure which restrict | squeezes the longitudinal cross-section 16A of the spiral flow path 16, in addition to the said embodiment, it is a square plate member, for example, the upper half of the longitudinal cross-section 16A, the lower half, or right and left It is good also as a structure which covers about half of one side of this.

(7) The cyclone type dust collector 10 of the first embodiment is for removing paint mist particles from the air, but the cyclone type dust collector for removing particles to be removed other than the paint mist from the air. The present invention may be applied to an apparatus.

10 Cyclone dust collector 12 Cylindrical case 14A Center pipe (center member)
DESCRIPTION OF SYMBOLS 15 Spiral guide 16 Spiral flow path 16A Longitudinal section 17C, 17D Partition member 19 Restriction part 22, 30 Nozzle 50, 50V, 50W Nozzle gathering part 51A, 51B Division area J1 Central axis

Claims (6)

A cylindrical case is provided with a spiral flow path partitioned by a spiral guide and a nozzle for spraying water mist, and particles to be removed contained in air passing through the spiral flow path are combined with the water mist. In the cyclone type dust collector that collects and collects on the inner surface of the cylindrical case by centrifugal force,
A plurality of the nozzles are arranged in a vertical cross section in which a surface including the central axis of the cylindrical case intersects with a part of the spiral flow path, and the water is supplied from the nozzles in the vertical cross section. Cyclone-type dust collector equipped with a nozzle assembly that sprays mist. A partition member for partitioning the longitudinal section into a plurality of divided regions is provided,
The cyclone type dust collector according to claim 1, wherein the plurality of nozzles of the nozzle assembly portion are attached to the partition member and spray the water mist toward each of the plurality of divided regions. A center member extending along the center of the cylindrical case is provided;
The partition member is passed between the center member and the inner surface of the cylindrical case,
The cyclone type dust collecting device according to claim 2, wherein the plurality of nozzles of the nozzle collecting portion are collected at a substantially central position in a longitudinal direction of the partition member and spray the water mist radially from the substantially central position. apparatus.   The cyclone type dust collector according to any one of claims 1 to 3, wherein the nozzle collecting portion is disposed at an upstream end portion of the spiral flow path.   The cyclone type dust collector according to any one of claims 1 to 4, wherein the whole of the plurality of nozzles in the cylindrical case is unevenly distributed on the upstream side of the spiral flow path.   The cyclone type dust collecting apparatus according to any one of claims 1 to 5, wherein the nozzle collecting portion of the helical flow path is a throttle portion having a smaller air passage area than other portions.