JP2011041927A - Separator for uncoated paint in coating booth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separator for the uncoated paint in a coating booth which can surely collect the uncoated paint. <P>SOLUTION: The separator for the uncoated paint separator of a coating booth 4 includes overflow tanks 19, 20 disposed in a collection chamber 11, two first flow plates 21, 22 that guide a collected water overflown from the overflow tanks 19, 20, two second flow plates 25, 26 with anteversion angles made larger than those of the first flow plates 21, 22, a first venturi 27 formed between the two first flow plates 21, 22, a second venturi 28 formed between the two second flow plates 25, 26, an atomization chamber 36 connected to a tip of one second flow plate 25, a ramp 31 extended from a tip of the other second flow plate 26, and a supply water pump 42 that refluxes the collected water 50 held at the bottom of the collection chamber 11 to the overflow tanks 19, 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an unpainted paint separating apparatus for a coating booth that collects uncoated paint contained in an airflow by bringing the airflow flowing down inside the coating chamber into contact with collected water in the collection chamber.

As a conventional uncoated paint separation device, a pre-venturi section is further provided inside the venturi section, and the collected water for collecting uncoated paint in the coating chamber is divided into two parts and the collection efficiency is reduced. Has been disclosed (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 4-106668

However, in the technique described in Patent Document 1, since the pre-venturi section is arranged inside the venturi section, the volume of the pre-venturi section is reduced, and along the flow plate that guides the collected water from the feed tank. If the amount of water flowing down into the preventive part is too large, atomization becomes difficult and the collection efficiency decreases. In order to solve this problem, it is necessary to increase the suction force of the exhaust fan communicating with the lower part of the painting chamber, which increases the cost. On the other hand, when the amount of water is too small, it becomes difficult to form a collected water film on the entire surface of the flow plate and the peripheral wall of the preventive part, which causes a problem of reducing the collection efficiency of uncoated paint.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is to ensure that the uncoated paint is reliably collected without reducing the collection efficiency of the uncoated paint. It is an object of the present invention to provide an unpainted paint separating apparatus for a painting booth that can collect the water.

In order to solve the above-mentioned problem, the invention according to claim 1 is included in the air flow by bringing the air flow flowing down the inside of the coating chamber into contact with the collected water in the collecting chamber provided below the coating chamber. In an unpainted paint separator at a painting booth that collects unpainted paint, an overflow tank installed on both sides of the collection chamber, and a collector that is connected to the overflow tank and overflowed from the overflow tank Two first flow plates disposed at the front lower side for guiding water, and a base end portion is connected to the first flow plate, and a forward tilt angle is disposed larger than a forward tilt angle of the first flow plate. Two second flow plates, a first venturi formed between the two first flow plates, a second venturi formed between the two second flow plates, and one second flow plate An atomization chamber connected to the tip, an inclined plate extending from the tip of the other second flow plate facing the atomization chamber, and collected water collected at the bottom of the collection chamber are placed in the overflow tank. A water supply pump for refluxing is provided, and the atomization chamber has an introduction hole formed by a tip of one second flow plate and the inclined plate, and a discharge hole formed below the inclined plate. .

According to the present invention, since the first flow plate, the second flow plate, the first venturi, the second venturi, the atomization chamber, the inclined plate, and the like are provided, a turbulent flow is generated in the collected water. As a result, the uncoated paint contained in the flowing airflow can be reliably collected, and the collection efficiency of the uncoated paint can be improved.

Cross-sectional view of an unpainted paint separating apparatus of a painting booth according to the present invention 1 is an enlarged view of the main part of FIG. Action explanatory drawing of the unpainted paint separation device of the painting booth according to the present invention

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, an uncoated paint separating apparatus for a paint booth according to the present invention is installed in a paint booth 4 formed in a tunnel shape by an upper wall 1, a lower wall 2, and left and right side walls 3. ing. The interior of the painting booth 4 is divided into four upper and lower chambers by a punching metal 5, a filter 6 and a slat 7, and the upper wall 1, the punching metal 5 and the left and right side walls 3 define the dynamic pressure chamber 8, the punching metal 5 and the filter 6. A static pressure chamber 9 is formed by the left and right side walls 3, a coating chamber 10 is formed by the filter 6, the slat 7 and the left and right side walls 3, and a collection chamber 11 is formed by the slat 7, the lower wall 2, and the left and right side walls 3, respectively. . A concave water tank 12 is provided at the center of the lower wall 2.

  A conveyor conveyer 13 is laid in the center of the slat 7 sandwiched between the left and right side walls 3 of the coating chamber 10, and the object W is placed on the conveyer 13 and conveyed in the direction perpendicular to the plane of FIG. The carriage 14 is engaged. A plurality of painting robots 16 are provided on both the left and right sides of the conveyance conveyor 13 to apply the object to be coated W conveyed by the conveyance carriage 14 with the spray gun 15.

  A supply duct 18 connected to the blower 17 is opened on the upper wall 1 of the painting booth 4, and the air supplied from the supply duct 18 to the dynamic pressure chamber 8 passes through the punching metal 5 and smoothly flows downward. The air is rectified into an air current and supplied to the static pressure chamber 9, and further passes through the filter 6 to be supplied to the coating chamber 10 as a clean air current from which dust is removed.

Further, a first overflow tank 19 is provided on the left side wall 3 side of the collection chamber 11, and a second overflow tank 20 is provided on the right side wall 3 side. From the lower ends of the two overflow tanks 19, 20, first flow plates 21, 22 that extend downward and relatively gently incline toward the center of the collection chamber 11. Furthermore, a first support plate 23 that extends vertically downward from the bottom surface of one first flow plate 21 and connects to the side wall of the water storage tank 12, and extends vertically downward from the bottom surface of the other first flow plate 22. A second support plate 24 is provided and connected to the side wall of the water storage tank 12.

Second flow plates 25, 26 inclined forward from the front ends of the two first flow plates 21, 22 toward the center of the collection chamber 11 and steeper than the first flow plates 21, 22, respectively. It is extended. Then, the first stage first venturi part 27 is formed by the two first flow plates 21 and 22, and the second stage second venturi part 28 is formed by the two second flow plates 25 and 26.

A vertical plate 29 extends from the tip of one second flow plate 25, and a horizontal plate 30 is disposed between the tip of the vertical plate 29 and the first support plate 23. In addition, an inclined plate 31 that is slightly lowered toward the center of the collection chamber 11 is provided at the lower end of the horizontal plate 30. At the tip of the other second flow plate 26, a guide plate 32 that is inclined forward and downward in a direction away from the center of the collection chamber 11 is provided. An upper wall plate 33 is disposed between the guide plate 32 and the second support plate 24.

  Below the upper wall plate 33 of the second support plate 24, a lower wall plate 34 that extends toward the center of the collection chamber 11 is provided, and a side wall plate is disposed between the tip of the lower wall plate 34 and the lower surface of the inclined plate 31. 35 is disposed. The atomization chamber 36 is formed by the upper wall plate 33, the second support plate 24, the lower wall plate 34, and the side wall plate 35. The tip of the inclined plate 31 is configured to be located at least inside the atomization chamber 36.

  The atomization chamber 36 has an introduction hole 37 formed between the upper wall plate 33 and the inclined plate 31 and a discharge hole 38 formed in the side wall plate 35. In the atomization chamber 36, a third overflow tank 39 is formed by the lower wall plate 34 or the like. When passing through the discharge hole 38 from the atomization chamber 36, a corner portion 40 is formed by the horizontal plate 30 and the first support plate 23 in the front.

  The bottom of the water storage tank 12 in which the collected water is stored and the two overflow tanks 19 and 20 are connected to the water supply pump 42 and the filter 43 via the water supply pipe 41, and the collected water stored in the water storage tank 12 is supplied by the water supply pump 42. It returns to the two overflow tanks 19 and 20. The right side wall 3 is provided with a separation chamber 45 communicating with the collection chamber 11 through an exhaust hole 44 opened in the second support plate 24, and the separation chamber 45 is connected to the atmosphere by an exhaust duct 47 provided with an exhaust fan 46 on the way. It is formed to communicate with. The separation chamber 45 is provided with a plurality of eliminators 48 inclined upward from the second support plate 24 toward the right side wall 3.

The operation of the non-coating paint separating apparatus for the painting booth according to the present invention configured as described above will be described. The object W to be coated placed and conveyed on the conveyance carriage 14 is painted by a spray gun 15 mounted on a plurality of painting robots 16 in the painting chamber 10. At this time, the air supplied from the supply duct 18 and passed through the dynamic pressure chamber 8 and the static pressure chamber 9 is rectified into a clean and smooth downward air flow and supplied to the coating chamber 10. Then, the air supplied to the painting chamber 10 passes through the gap between the slats 7 and flows into the collection chamber 11 together with the uncoated paint drifting in the painting chamber 10.

  In the collection chamber 11, as shown in FIG. 3, the collected water 50 supplied from the water storage tank 12 to the two overflow tanks 19 and 20 by the water supply pump 41 overflows, and the surfaces of the first flow plates 21 and 22 are overflowed. A part of the uncoated paint is collected by flowing and contacting the collected water 50 with the uncoated paint. Further, the flow velocity of the downward airflow 51 flowing down from the coating chamber 10 is accelerated by the first-stage first venturi portion 27 formed by the two first flow plates 21 and 22, and accordingly, the two first flows. The airflow 51 collides obliquely downward with the collected water 50 flowing down the surfaces of the plates 21 and 22. As a result, turbulent flow is generated in the collected water 50, atomization of the collected water 50 is promoted, and uncoated paint contained in the flowing air flow 51 is further collected.

Next, the flow velocity of the airflow 51 that has passed through the first venturi portion 27 of the first stage is accelerated by the second venturi portion 28 of the second stage formed by the two second flow plates 25 and 26, and accordingly, 2 The collected water 50 flowing down the surfaces of the two second flow plates 25, 26 is sucked and guided downward in the axial direction of the second stage second venturi portion 28. Then, the collected water 50 flowing down the surfaces of the two second flow plates 25 and 26 collide with each other to promote atomization, and the uncoated paint contained in the flowing airflow 51 is further collected.

  Next, the collected water 50 whose atomization has been promoted is guided from the introduction hole 37 to the atomization chamber 36, collides with the second support plate 24 forming the atomization chamber 36, is further atomized, and flows down. The uncoated paint contained in 51 is further collected. The atomized collected water 50 is discharged as a spray flow from the discharge hole 38, and uncoated paint contained in the flowing airflow 51 is further collected.

The spray flow collides with the horizontal plate 30 forming the front corner 40 and the first support plate 23, and a part of the spray flow becomes a water film of the collected water 50 and flows down the first support plate 23. The water is stored in the water tank 12. The uncoated paint floating in the spray flow is further collected in the collected water 50 flowing down. Further, a part of the spray becomes a spray flow and diffuses in a lower portion of the collection chamber 11 to collect the uncoated paint that is still floating in the air flow 51.

  Further, a part of the atomized collected water 50 existing in the atomization chamber 36 becomes a water film and flows down the second support plate 24 and is stored in the third overflow tank 39 of the atomization chamber 36. Is done. In the course of this flow, uncoated paint contained in the airflow 51 is further collected. The collected water 50 overflowed from the third overflow tank 39 falls as a water film from the discharge hole 38 and falls into the water storage tank 12. This water film further collects uncoated paint floating in the spray flow.

  In this way, the airflow 51 including the atomized collected water that has collected the uncoated paint moves to the separation chamber 45 through the exhaust hole 44 opened in the second support plate 24, and enters the separation chamber 45. A plurality of arranged eliminators 48 separate the atomized collected water and air, and the separated collected water 50 is stored in the water storage tank 12. On the other hand, the separated air is discharged from the separation chamber 45 to the atmosphere by an exhaust duct 47 provided with an exhaust fan 46 on the way. At this time, uncoated paint particles are not contained in the air, but are released as clean air.

According to the present invention, there is provided an uncoated paint separating apparatus for a painting booth that can reliably collect uncoated paint contained in an air flow generated by painting in a painting booth.

DESCRIPTION OF SYMBOLS 1 ... Upper wall, 2 ... Lower wall, 3 ... Left and right side wall, 4 ... Painting booth, 5 ... Punching metal, 6 ... Filter, 7 ... Snowboard, 8 ... Dynamic pressure chamber, 9 ... Static pressure chamber, 10 ... Painting chamber , 11 ... Collection chamber, 12 ... Water storage tank, 19 ... First overflow tank, 20 ... Second overflow tank, 21, 22 ... First flow plate, 23 ... First support plate, 24 ... Second support plate, 25 , 26 ... second flow plate, 27 ... first venturi section, 28 ... second venturi section, 31 ... inclined plate, 36 ... atomization chamber, 37 ... introduction hole, 38 ... discharge hole, 42 ... feed pump, 50 ... Collected water, 51 ... Airflow, W ... Coating object.

Claims (1)

Unpainted paint booth that collects unpainted paint contained in the airflow by bringing the airflow flowing through the interior of the paint chamber into contact with the collected water in a collection chamber located below the paint chamber In the paint separator, there are two overflow tanks disposed on both sides of the collection chamber and two lower ends disposed at the front end of the overflow tank for guiding the collected water overflowed from the overflow tank by being connected to the overflow tank. One flow plate, two second flow plates disposed at a base end portion connected to the first flow plate and having a forward tilt angle larger than a forward tilt angle of the first flow plate, and the two first flow plates A first venturi formed between the plates, a second venturi formed between the two second flow plates, a atomization chamber connected to the tip of one second flow plate, and the particles Chemical room An inclined plate extending from the tip of the other second flow plate facing the water supply pump, and a water supply pump for returning the collected water collected at the bottom of the collection chamber to the overflow tank, 2. An uncoated paint separating apparatus for a coating booth, characterized by having an introduction hole formed by a tip of a flow plate and the inclined plate, and a discharge hole formed below the inclined plate.