JPH0131342Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for collecting oversprayed paint in a paint booth.

When painting an object with a spray gun, if you release the oversprayed paint as it is,
Since paint mist and odor are diffused and cause air pollution, conventionally the oversprayed paint is sucked up by an exhaust fan and passed through a water curtain installed in the middle of the exhaust passage to eliminate the above problems. Efforts were being made to remove paint mist and odors.

FIG. 1 shows a side cross-sectional view of a shower-type paint collection device, which is a typical example of the above-mentioned removal device. 4 is a ventilation fan chamber provided in the upper part of the exhaust chamber 2, 5 is a motor for the exhaust fan, 6 is a water tank provided below the exhaust chamber 2, and 7 is a ventilation fan chamber provided in the water tank 6. Strainer provided, 8
The water curtain shown by the arrow W is formed at the suction port 2a of the exhaust chamber 2 by causing water supplied from the water tank 6 through the strainer 7 by a pump (not shown) to overflow along the partition wall 3. In the overflow chamber, 9 is a nozzle that spouts water pumped from the water tank 6 into the middle of the exhaust chamber 2 to form a shower curtain denoted by S, and 10 is an eliminator.

The conventional collecting device configured as described above collects oversprayed paint when a painted object 11 suspended in a booth 1 is spray-painted using a spray gun 12 by the suction action of an exhaust fan. After primary collection through the water curtain W, secondary and tertiary collection is performed through the shower curtain S and eliminator 10. Therefore, most of the paint mist and odor can be collected.

However, the shower curtain type collection device described above has the problem that the paint mist passes between the fine water particles ejected from the nozzle 9 and cannot be completely collected. Since the shower curtain S circulates the water filtered by the strainer 7, after long-term use, the fine paint mist that cannot be filtered by the strainer 7 will gradually block the spout holes of the nozzle 9, causing the shower to become completely dry. There was a problem in which the curtain S could not be formed.

Further, in the case of the collection device using the water curtain W described above, there was a problem in that water falling into the water tank 6 splashed onto the painting section side in the booth 1 and wet the painting object 11, damaging the painting.

The present invention has been devised in view of the above-mentioned points, and its purpose is to reliably collect oversprayed paint using an extremely simple configuration, and to eliminate circulation mixed with paint mist. Even when water is used as a collection curtain water, it can continue to exhibit the same collection effect for a long time without causing clogging etc., and it has also been devised so that the water in the water curtain does not splash onto the painted area. In order to achieve the above object, the present invention has a partition wall that partitions an exhaust chamber that sucks oversprayed paint and is bent inward. Inside the exhaust chamber, a multi-stage water curtain device is provided that causes the water overflowing from the overflow tank to flow down alternately in the inside and outside of the exhaust chamber, and the suction paint is passed through these multi-stage water curtains. It is configured so that it can be collected.

Next, a preferred embodiment of the spray paint collecting device according to the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, Fig. 2 is a side sectional view showing one embodiment of the present invention, Fig. 3 is a partially omitted plan view of the overflow gutter which is the main part of the invention, and Fig. 4 is the above-mentioned This figure shows a side sectional view of the overflow gutter and the water flow board. In these drawings, 20 is a painting booth, 21
23 is an exhaust chamber partitioned by a partition wall 22 at the innermost part of the booth 20, and 23 is an exhaust fan chamber connected to the upper outer end of the exhaust chamber 21. is an exhaust fan (not shown) which exerts a suction action on the booth 20 through the exhaust chamber 21 by being rotated by a motor 24;
is installed. In addition, 25 is the exhaust chamber 2
2 is a water tank installed at the bottom of 1, 26 is a strainer installed in the water tank 25, and 27 is a strainer 26.
This pump supplies the filtered water through the water supply pipe 28 to the overflow chamber and overflow gutter described below.

The overflow chamber 30 provided above the exhaust chamber 21
These include a water supply port 31 that supplies water sent through the water supply pipe 28 into the overflow chamber 30, and a rectifying plate 32 that rectifies the supplied water and causes it to uniformly overflow from the upper end 22a of the partition wall 22. The water overflowing and falling along the partition wall 22 toward the water tank 25 forms a water curtain shown by an arrow W at the lower end suction port 21a of the exhaust chamber 21. Further, in the illustrated embodiment, the lower end 22b of the partition wall 22 is bent inward to prevent the water curtain W falling into the water tank 25 from splashing toward the painting section of the booth 20.

Next, the configuration of the multi-stage water curtain generator provided in the exhaust chamber 21 described above will be explained.

That is, in the figure, 40 is an overflow gutter that is installed horizontally in the middle of the exhaust chamber 21 so as to cross the exhaust passage.
Reference characters a and 40a indicate guide plates that are connected diagonally downward to the left and right upper edges of the overflow gutter 40. Also, 41,
Reference numeral 41 denotes a rectifying plate attached to both sides of the inside of the overflow gutter 40, and the water sent through the water supply pipe 28 is supplied to the inside of the overflow gutter 40 from the water supply port 42.
After being rectified by the rectifier plates 41, 41, the upper water curtain W3 crosses over the left and right guide plates 40a, 40a, respectively, and cuts off the exhaust passage diagonally downward.
The structure is such that the water overflows (see Figure 4).

Next, reference numerals 43, 43 are first water flow plates provided at the left and right lower portions of the overflow gutter 40 in a diagonally downwardly inclined state, and these left and right first water flow plates 43, 43 are as follows:
Each upper water curtain W3 that overflows and falls along the guide plates 40a, 40a of the overflow gutter 40,
By guiding the flow down diagonally in the opposite direction toward the left and right inclined surfaces 44a, 44a of the water distribution plate 44 having a triangular cross section and extending across the lower side of the overflow gutter 40, so as to block the exhaust passage, as shown in FIG. In this, a middle water curtain W2, each designated by the reference numeral W2, is constructed.

Further, reference numerals 45, 45 are second water flow plates provided at the left and right lower portions of the water dividing plate 44 in a diagonally downwardly inclined state, and these left and right second water flow plates 45, 45 are as follows:
A lower water curtain W1 (see FIG. 4) that flows diagonally downward from the water dividing plate 44 so as to block the left and right exhaust passages, respectively, is received and placed in the water tank 25.
In the case of the multi-stage water curtain generating device described in the above embodiment, the water curtains in the upper, middle, and lower three stages W3 to W1
However, by adding water dividing plates 44 and water flow plates 43 vertically, it is possible to increase the number of water curtains and further improve the collection efficiency.

In addition, 46 and 47 in the figure are water flow control valves of a water curtain provided in the middle of the water supply pipe 28.

Further, 48 is an eliminator installed above the overflow gutter 40.

Since the collection device according to the present invention has the configuration described above, by driving the exhaust fan, a suction effect is exerted on the booth 20 through the exhaust chamber 21, and at the same time, by driving the pump 27, the water in the water tank 25 is circulated. The painted object 50 suspended in the booth 20 is sprayed while forming water curtains W, W1, W2, W3 that block the exhaust passage at the suction port 21a of the exhaust chamber 21 and inside the exhaust chamber 21, respectively. When painting with the gun 51, the air containing the oversprayed paint mist is suctioned by the exhaust fan and passes through each of the water curtains W to W3 in turn, where the paint mist and odor are gradually cleaned and collected. Finally, it becomes purified air and is exhausted to the atmosphere.

As explained above, according to the spray paint collection device according to the present invention, a multi-stage water curtain can be formed in the exhaust chamber, so that the oversprayed spray paint can be passed through the water curtain in order. It can collect and remove paint mist and odors, so it has a much better collection effect than conventional shower-type collection devices, and since it does not use any nozzles, it can remove fine paint mist. Even when using circulating water containing water, there is no problem of clogging, and the water curtain has the advantage of maintaining a stable collection effect for a long period of time. In addition, the structure is simple and easy to implement, making it highly practical for use in various water-washable painting booths.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a conventional device, Fig. 2 is a side sectional view showing an embodiment of the present invention, Fig. 3 is a partially omitted plan view of an overflow gutter, and Fig. 4 is a side sectional view of a water curtain. FIG. 3 is an enlarged side sectional view of the main part showing the shape state. 20...Painting booth, 21...Exhaust chamber, 22
... Partition wall, 22b ... Lower end, 40 ... Overflow gutter, 40a ... Guide plate, 43, 45 ... Water flow plate,
44... Water divider board, W1, W2, W3... Water curtain.

Claims (1)

[Scope of Claim for Utility Model Registration] An exhaust chamber 21 is defined at the back of the interior of the painting booth 20 by a partition wall 22 in which oversprayed paint is sucked and exhausted by an exhaust fan. In the upper and lower parts of the chamber 21, water sent through the water supply pipe 28 overflows and falls along the outer surface of the partition wall 22 to form the exhaust chamber 2.
In the spray paint collection device, which is provided with an overflow chamber 30 forming a water curtain W at the lower end suction port 21a of 1, and a water tank 25 for accommodating the falling water, the above-mentioned partition wall 22 The lower end portion 22b is bent toward the inside of the exhaust chamber 21, and an overflow gutter 40 is provided at an intermediate position inside the exhaust chamber 21 to cause water sent through the water supply pipe 28 to overflow to the left and right. , left and right guide plates 40a, 40a that guide the water overflowing from this overflow gutter 40 diagonally outward to the left and right to form an upper water curtain W3, and these left and right guide plates 40.
The left and right water flow plates 43 form the water curtain W2 in the middle stage by guiding the water that flows diagonally outward to the left and right while being guided by the panels a and 40a to the center of the exhaust chamber 21 and guiding the water to flow diagonally inward toward the center of the exhaust chamber 21. ,43 and
The water that has been guided by these left and right water flow plates 43, 43 and flowing down towards the center is again guided down in the left and right diagonally outward directions to form the lower water curtain W1.
A spray paint collecting device characterized in that it is provided with a multi-stage water curtain generating device comprising a water dividing plate 44 having a substantially triangular cross section.