JPH0471586B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a collection device for preventing scattering of paint mist generated during paint spraying.

Currently, near paint factories, there are many complaints from nearby residents due to the scattering of paint mist that occurs during paint spraying, including the pungent odor of paint and the risk of ignition due to drying paint mist. At present, we are struggling to take countermeasures.

For this reason, many attempts have been made to improve this type of coating apparatus, but all of them have found it very difficult to efficiently assist the paint mist.

SUMMARY OF THE INVENTION Therefore, the present invention provides a device that is capable of efficiently collecting paint mist, which was not possible with conventional products, and that also facilitates and simplifies maintenance, inspection, and cleaning operations.

Next, the present invention will be explained based on the drawings.A coating machine 1 installed in a coating room A has a wind direction plate 2 having an arcuate cross section at the top, a water flow plate 3, an overflow tank 4, and a lower water tank 5. A primary collection device B, a secondary collection device C provided with nozzles 6 and 7 provided on the back side of the water flow plate 3, and diagonal water flow plates 8 and 9, and an exhaust fan ( (not shown), and the painting chamber A is always maintained in an airtight state of about 2 atmospheres.

Then, the compressed air in the painting room A is blown toward the ceiling wind direction plate 2 as shown by the arrow 10, overflows from the overflow tank 4 along the arcuate cross-sectional surface, and flows down the water flow plate 3. Lower water tank 5 with water
direction by the suction of the exhaust fan.

At this time, a part of the paint sprayed onto the object to be painted on the painting workbench 11 becomes a mist and is transferred from the overflow tank 4 to the water flow plate 3 by the airflow 10 created by the air flow plate 2. The water adheres to and is absorbed by the curtain of water that flows down, and is collected in the lower water tank 5, and the water in the lower water tank is repeatedly used again via the circulation filtration device.

In this way, most of the generated mist is collected by the primary collection device B, but the paint mist that cannot be collected still remains and is discharged to the outside. The invention further includes a secondary collection device C.

That is, the paint, most of the mist of which has been collected by the water flowing down the water flow board 3 in a curtain-like manner, is transferred to the flow path D by widening the opening diameter D and narrowing the depth on the back side of the water flow board 3. ’ through the so-called V-shaped structure V,
It is a device that completely removes mist and
The nozzles are arranged opposite to each other on the upper and lower sides of D', and the nozzles are arranged alternately in a staggered manner at a predetermined interval in the lateral direction. The paint that has passed through the primary mist collecting device B is guided to the secondary mist collecting device C formed by the water flow plates 8 and 9 by suction from an exhaust fan. Initially, in the process of ascending at a slow speed through D, which has a wide opening diameter, and increasing velocity in the narrow flow path D', the upper and lower nozzles 6 and 7 overlap the spray area with each other. The remaining paint mist is forcibly attached to and absorbed by the formed water film, flows down on the surfaces of the diagonal water flow plates 8 and 9, and is collected in the lower water tank 5. It is.

As mentioned above, the secondary collection device C is a device that improves the efficiency of mist collection by varying the flow velocity by forming the narrow flow path D'. Unlike the cylinder type, most of the paint mist is collected through the V-shaped structure of the flow path D'.

As is clear from the conventional paint mist collecting device shown in FIG. It is completely effective and has practical advantages.

Furthermore, it has many advantages such as the ability to clean the exhaust air and waste water to the outside.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a paint mist collecting device according to the present invention, and FIG. 2 is an explanatory diagram of a conventional paint mist collecting device. 1...Painting machine, 2...Wind direction board, 3...Water flow plate,
4...Overflow tank, 5...Lower water tank, 6,7
... Nozzle, 8, 9 ... Oblique water flow plate, 10 ... Air flow, 11 ... Painting workbench, D ... Wide opening,
D′...Narrowly constricted flow path, V...V-shaped structure, A...
...painting room, B...primary collection device, C...secondary collection device.

Claims (1)

[Claims] 1. A primary collection device that collects paint mist in the lower water tank through water that overflows from the wind direction plate and the overflow tank and flows down the water flow plate surface in a film form, and an opening on the back side of the water flow plate. A wide channel with a narrow depth, and upper and lower nozzles arranged horizontally at the narrowest part of the channel, with the injection directions facing each other, and the nozzle injection port. The second collecting device has a V-shaped structure, which is arranged in a staggered manner to overlap and diffuse the jetted water film, and to change the flow velocity of air between the wide opening and the narrowest channel. A paint mist collection device characterized in that it is connected to a primary collection device.