JP2641607B2 - painting booth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is designed to remove paint mist in air by sucking air in a paint chamber into a mist treatment chamber provided under the floor. About the painting booth.

[Conventional technology]

As shown in FIG. 3, this type of coating booth is provided between the left and right walls 32R and 32L of a mist treatment chamber 31 provided below the floor of a coating chamber 30 where the coating of the workpiece W is performed. Floor 3
A plurality of water tanks 34 arranged in parallel with 3 form overflow gutters 35
The water flowing from each water tank 34 into the overflow gutter 35 forms a water film that closes the slit 36 formed at the bottom of the overflow gutter 35, and from the coating chamber 30 to the mist treatment chamber 31. When the air to be sucked breaks through the water film and passes through the slit 36, the air and the water are brought into gas-liquid contact, whereby the paint mist contained in the air is adsorbed and collected by the water droplets, Furthermore, both left and right walls 32R, 32L of the mist treatment chamber 31
Air and water splashes sucked into the exhaust duct 37 connected to
The baffle plate 39 of the baffle plate passage 38 formed in the exhaust duct 37 is caused to collide with each baffle plate 39 to improve the effect of collecting paint mist (Japanese Utility Model Publication No. 59-21894, Japanese Utility Model Application Laid-Open No. 62-1).
No. 74667).

However, in this case, the slit of overflow gutter 35
Since the water droplets adsorbing the paint mist scatter from all over the area inside the mist treatment chamber 31 from the 36, in order to prevent the fine water droplets contaminated by the paint mist from being directly discharged outside through the exhaust duct 37, the exhaust The suction port of the duct 37 must be opened to both left and right walls 32R, 32L of the mist treatment chamber 31 away from the overflow gutter 35.

Therefore, since the exhaust duct 37 must be disposed outside the mist treatment chamber 31, the installation space of the entire coating booth becomes large by the provision of the exhaust duct 37.

Further, as shown in FIG. 4, water conduits 40R and 40L are provided along the left and right walls 32R and 32L of the mist treatment chamber 31, and the water conduit 40 is provided.
The mist treatment chamber 31 with running water overflowing from R, 40L
Left and right flow plates tilting downward toward the center of the
A water film is formed on the surfaces of 41R and 41L, and the gap between the venturi portions 42 opened between the two flow plates 41R and 41L is closed, so that the air sucked from the interior of the coating chamber 30 into the mist treatment chamber 31 is blocked by flowing water. Break through the venturi 42
There is also a painting booth that, when colliding with 43, adsorbs and collects the paint mist contained in the air by the gas-liquid contact of the air and water droplets (Japanese Patent Publication No. 55-6427, actual See JP 60-34367 A).

However, in this case as well, the water droplets adsorbing the paint mist scatter throughout the entire area of the mist treatment chamber 31, so that fine water droplets contaminated with the paint mist are discharged to the outside as they are through the exhaust duct 37. In order to prevent this, the suction port of the exhaust duct 37 must be opened to the side wall 32R or 32L of the mist treatment chamber 31 farthest from the venturi section 42, and a space for providing the exhaust duct 37 outside the mist treatment chamber 31 is required separately Becomes

Further, in order to close the gap of the venturi section 42 with flowing water overflowing from the headraces 40R, 40L, the headraces 40R, 40L,
Since the amount of water supplied to 40L is extremely large, the cost of supplying water is increased and the burden of wastewater treatment is also large.

[Problems to be solved by the invention]

Therefore, the present invention provides an exhaust duct so as to fit in the installation space of the mist treatment chamber, and eliminates the need for an extra space for providing the exhaust duct, and provides the exhaust duct in the installation space of the mist treatment chamber. However, technical measures must be taken to prevent the air containing paint mist from being discharged outside through the exhaust duct, and to reduce the amount of water supplied to the mist treatment chamber to save resources and reduce the burden of wastewater treatment. It is an issue.

[Means for solving the problem]

In order to solve this problem, the present invention relates to a coating booth configured to remove air mist from the air by sucking air in the coating chamber into a mist processing chamber provided under the floor. Between the upper water tank extending from one wall side of the processing chamber toward the other wall side and the lower water tank extending from the other wall side of the mist processing chamber toward the one wall side, from the extending end of the upper water tank. A flow plate in which a water film is formed on the surface by flowing water that has been dropped into the lower water tank, and flowing water and air that are sucked into the back side of the flow plate from a suction opening that opens at a lower end of the flow plate; A baffle plate passage for dropping paint mist collected by liquid contact into the lower tank is interposed, and an exhaust duct for discharging purified air through the baffle plate passage to the outside is provided below the upper tank. Characterized in that it is arranged in parallel adjacent to the passageway.

[Action]

According to the present invention, the paint mist contained in the air sucked from the coating chamber into the mist treatment chamber falls down and is collected in the upper tank and the lower tank, and is interposed between the two tanks. The water film formed on the surface of the flow plate is adsorbed and collected.

Further, the paint mist other than the above is carried to the air sucked from the suction port opened at the lower end of the flow plate, and is sucked into the baffle plate passage together with the running water forming the water film on the surface of the flow plate. Is collected by the gas-liquid contact that occurs in the tank and dropped into the lower water tank.

And the air purified through the baffle plate passage,
The air is discharged to the outside through an exhaust duct provided below the upper water tank adjacent to the baffle plate passage.

Here, in the present invention, the water tank provided in the mist treatment chamber is composed of an upper water tank and a lower water tank, and a space for providing an exhaust duct below the upper water tank is secured. Fits in space.

In addition, between the upper water tank and the lower water tank, a flow plate that forms a water film with flowing water overflowing from the upper water tank, and flowing water and air sucked from a suction port opened at a lower end of the float plate in gas-liquid contact. Since the baffle plate passage for purifying the air is interposed, even if the exhaust duct is provided below the upper water tank and stored in the installation space of the mist treatment chamber, paint mist is contained through the exhaust duct. There is no possibility that the contaminated air is released to the outside as it is.

Further, the mist treatment chamber may be supplied only to the upper water tank with an amount of water that can form a water film on the surface of the flow plate interposed between the upper water tank and the lower water tank. Very little water supply is required.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a front view showing an example of a painting booth according to the present invention.

In the coating booth of this example, the clean air supplied to the air supply chamber 1 is introduced into the coating chamber 2 at a predetermined wind speed through a filter 3 provided on the ceiling portion of the coating chamber 2, and is introduced into the coating chamber 2. The air containing the generated paint mist is sucked into the mist treatment chamber 4 provided below the floor of the coating chamber 2.

In the mist treatment chamber 4, an upper water tank 7 is extended from the one wall 6L side to the other wall 6R side of the mist treatment chamber 4 in parallel along and directly below the floor 5 of the coating chamber 2. Along the bottom of the mist treatment chamber 4, a lower water tank 8 extends from the other wall 6R side of the mist treatment chamber 4 to the one wall 6L.

And, between the upper water tank 7 and the lower water tank 8, a flow plate 9 having a water film formed on its surface by flowing water which overflows from the extending end of the upper water tank 7 and falls into the lower water tank 8, A baffle plate passage 11 is provided to drop paint mist collected by gas-liquid contact between flowing water and air from a suction port 10 opened at the lower end of the flow plate 9 into the lower water tank 8. ing.

An exhaust duct 12 for discharging purified air through the baffle plate passage 11 to the outside is provided below the upper water tank 7 in parallel with the adjacent baffle plate passage 11.

The extended end of the upper water tank 7 is provided with a paint residue or the like floating on the liquid surface of the upper water tank 7 so that paint residue or the like generated by paint mist falling into the upper water tank 7 does not overflow with running water. A baffle plate 13 is provided to block the air.

Below the suction port 10 opening at the lower end of the flow plate 9, a gutter 14 is formed in parallel with the suction port 10 to form a water film on the flow plate 9 to receive flowing water flowing down and to store a certain amount of water. The trough 14 ensures that a sufficient amount of water for gas-liquid contact with air sucked from the suction port 10 is always secured.

Further, in the baffle plate passage 11, a plurality of baffle plates 15 for colliding air or water droplets sucked from the suction port 10 opened below are arranged vertically in a left and right direction, and the baffle plate In the upper part of the passage 11, a connection port 16 with the adjacent exhaust duct 12 is opened.

Reference numeral 17 denotes a water supply pipe for supplying water into the upper water tank 7,
Reference numeral 18 denotes an inspection door provided to enable inspection and cleaning of the inside of the baffle plate passage 11 from within the exhaust duct 12.

The above is the configuration of the painting booth shown in FIG. 1. Next, the operation will be described.

The flowing water that overflows from the extended end of the upper water tank 7 supplied by the water supply pipe 17 flows down while forming a water film on the surface of the flow plate 9, and a part of the water flows through the suction port 10 opened at the lower end of the flow plate 9. Is sucked into the baffle plate passage 11 and is subjected to gas-liquid contact with air containing paint mist, and the others are temporarily received in a gutter 14 provided along the lower portion of the suction port 10, and then the gutter is It overflows from 14 and falls into the lower tank 8.

Thereby, the upper water tank 7 is provided inside the mist treatment chamber 4.
And a water wall composed of a lower water tank 8 and a flow plate 9 that forms a water film on the surface, so that paint mist in the air sucked from the coating chamber 2 into the mist treatment chamber 4 is removed.
It is dropped into the upper water tank 7 and the lower water tank 8 or is adsorbed and collected on the water film of the flow plate 9.

The extremely fine paint mist that does not fall into the upper water tank 7 or the lower water tank 8 and is not adsorbed on the water film of the flow plate 9 is sucked from the suction port 10 opened at the lower end of the flow plate 9. Baffle plate passage along with flowing water that is carried by
The water droplets are sucked into the water tank 11, are collected by contacting with the water droplets generated at that time, collide with the baffle plate 15 together with the water droplets, and fall into the lower water tank 8.

The air from which the paint mist has been removed through the baffle plate passage 11 flows from the baffle plate passage 11 to the exhaust duct 12.
Is discharged to the outside.

Here, the exhaust duct 12 is disposed below the upper water tank 7 provided in the mist treatment chamber 4 so that the mist treatment chamber 4
The space for installation of the exhaust duct 12 other than the space for installation of the mist treatment chamber 4 becomes unnecessary, and the installation space of the entire coating booth is reduced.

Further, even if the exhaust duct 12 is disposed below the upper water tank 7 provided in the mist treatment chamber 4, water droplets containing paint mist scattered in the mist treatment chamber 4 pass through the exhaust duct 12. There is no risk of being discharged outside.

Further, the mist treatment chamber 4 is filled with an amount of water such that a water film can be formed on the surface of the flow plate 9 in the water supply pipe 17 of the upper water tank 7.
Since it is enough to supply water from the water supply, the amount of water supply is very small.

Particularly, as in the embodiment, a gutter 14 for storing flowing water flowing down the surface of the flow plate 9 along the suction port 10 opened at the lower end of the flow plate 9 is provided, and the gutter 14 is stored in the gutter 14. If water is also provided for gas-liquid contact, the upper tank 7
The amount of flowing water that overflows from can be significantly reduced.

Further, as in the present invention, the exhaust duct 12 is connected to the mist treatment chamber 4.
2, a coating room 2a in which an automatic coating is performed by an automatic coating machine 19 in a coating factory, as shown in FIG.
And a painting booth having a painting chamber 2b for performing hand-blown painting can be placed adjacent to each other in close contact on the left and right, and further, an exhaust duct 12 provided in the mist treatment chamber 4 of each painting booth. Can be shared with each other to completely integrate the two painting booths, so that the installation space of the entire painting booth is greatly reduced.

〔The invention's effect〕

As described above, according to the present invention, since the exhaust duct is provided inside the mist treatment chamber, no extra space for providing the exhaust duct is required, and the installation space of the entire coating booth is reduced. There is an excellent effect.

Also, even if the exhaust duct is provided inside the mist treatment chamber,
There is an excellent effect that contaminated air containing paint mist is not likely to be directly discharged to the outside through the exhaust duct.

Further, there are various excellent effects that the amount of water supplied for collecting the paint mist is very small.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a painting booth according to the present invention,
FIG. 2 is a front view showing another embodiment, and FIGS. 3 and 4 are front views showing a conventional painting booth. Description of reference numerals 2 ... painting room, 4 ... mist treatment room, 6L ... one wall, 6R ... other wall, 7 ... upper water tank, 8 ... lower water tank, 9 ... flow plate, 10 ... suction Mouth, 11 ... Baffle plate passage, 12 ... Exhaust duct.

Claims (1)

(57) [Claims] A coating booth adapted to suck air in a coating chamber (2) into a mist processing chamber (4) provided under the floor to remove paint mist in the air. From the one wall (6L) side of the processing chamber (4) to the other wall (6R)
Between the upper water tank (7) extending toward the side and the lower water tank (8) extending from the other wall (6R) side to the one wall (6L) side of the mist treatment chamber (4). A flow plate (9) having a water film formed on its surface by flowing water that overflows from the extending end of the upper water tank (7) and falls into the lower water tank (8), and opens at the lower end of the flow plate (9). A baffle plate passage (11) for dropping paint mist collected by gas-liquid contact between flowing water and air from the suction port (10) to the back side of the flow plate (9) into a lower water tank (8) is formed. An exhaust duct (12) that is interposed and that discharges purified air through the baffle plate passage (11) to the outside is provided adjacent to and parallel to the baffle plate passage (11) below the upper water tank (7). A painting booth characterized by being performed.