JP3704083B2 - Flushing booth using two-stage water flow - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coating booth that sucks and collects paint mist that is scattered without being applied to an object to be sprayed among paints sprayed in spray coating, and particularly sucks the paint mist together with an air current by an exhaust fan, The present invention relates to a washing-type paint booth that captures paint mist with shower water and discharges it as clean air.
[0002]
[Prior art]
As shown in FIG. 4, a general water-washing painting booth has a water tank 45 in the lower part, sucks the mist-containing airflow in the front of the painting chamber by the exhaust fan 41, and passes the nozzle 44 when passing through the mist processing chamber 43. The water shower is sprayed to catch the mist with water in the lower aquarium, and the water sucked up by a pump (not shown) is supplied to the nozzle 44 and overflows to the water flow plate 42 provided in the front of the painting chamber. It is supplied to 樋 46. The paint captured in the mist processing chamber 43 provided at the rear of the water flow plate and the water flow plate is dropped into the water tank and separated and recovered as sludge.
[0003]
This type of paint booth captures scattered paint mist by contact with water, so increasing the chance of contact can increase the collection efficiency and increase the purification of the exhausted air. Environmental pollution can be prevented.
[0004]
In addition, when using water droplets from a shower, the surface area increases as the water droplets become finer, and the trapping effect can be increased with the same amount of water. The problem of environmental pollution occurs due to a decrease in the collection efficiency.
[0005]
In addition to collecting paint mist by a shower, a general water washing booth has a water flow plate. Normally, a water flow plate is provided in front of the painting chamber, and the water supplied to the tub arranged on the upper portion of the water flow plate is overflowed by a pump to form a water film on the entire surface of the water flow plate. The lower part of the water flow plate is formed between the surface of the water in the water tank and a suction port for the air flow sucked into the processing chamber so that the overspray mist can be sucked effectively and captured in the processing chamber. ing. Moreover, the paint particles that have traveled straight out of the sprayed overspray particles collide with the water film, fall into the water tank together with water, and are captured in the same manner as in the shower.
[0006]
A problem with such a water-washing type painting booth is that a lot of time is required for cleaning due to adhesion and contamination of paint mist that cannot be captured in the interior of the painting chamber. In addition, since a large amount of water flows, there is a problem of sound caused by the water flow. That is, the sound of water flowing down the water flow plate, passing through the suction port and falling onto the water surface becomes noise, which causes a decrease in the work environment such as discomfort for the operator. The sound of water falling from the washing shower in the processing chamber into the water tank is also the same.
[0007]
[Problems to be solved by the invention]
In order to maintain the maximum efficiency of mist capture, which is the basic function of the water-washing paint booth, the amount of water is reduced by effectively arranging the water or water flow to capture in the area through which the air flow containing paint mist passes. It is necessary to increase the capture efficiency. As a result, it is required to reduce the amount of paint adhering to other parts of the coating chamber and to facilitate daily maintenance required for cleaning and the like.
[0008]
In addition to preventing the generation of a strange odor due to dirt from the work environment, it is an object of the present invention to obtain a paint room that is quieter and has a better work environment by reducing the noise caused by the water flow caused by the circulation of water.
As described above, it is necessary to increase the amount of water in order to increase the collection efficiency of mist. However, if the amount is increased, the noise will increase and the effect of capturing the circulating water without increasing the amount of water will be improved. It is also necessary to increase the collection efficiency.
[0009]
[Means for solving problems]
In order to solve these problems, the present invention draws a paint mist from the suction port at the lower front of the coating chamber by a suction airflow from an exhaust fan, and sprays a water shower into the mist-containing airflow passing through the mist processing chamber to paint For the flush-type paint booth that captures the mist, a tub that receives the sprayed shower water is provided, a part of the shower water is returned to the water tank, and the rest is overflowed along the longitudinal direction of the tub to form a vertical surface. It is characterized by being configured to flow down to the surface of the water below the water flow plate.
[0010]
Because shower drainage can be used in this way, a new supply pump is not added or the mist is captured by a water flow plate installed inside without increasing the pumping volume, thereby preventing paint adhesion and contamination inside the paint chamber Can do. In addition, by receiving the water falling from the shower in the internal tub, it is possible to reduce the sound when falling directly on the water surface, reduce the noise to the painting room side, and improve the working environment. Further, as a means for efficiently receiving shower water in the tub, a guide may be provided so that a passage can be formed toward the tub.
[0011]
Furthermore, when overflow water flows down to the water flow plate, a means for adjusting the amount of shower water to adjust the flow rate sufficient to form a water film or a means for adjusting the flow path to return to the water tank is provided. The state can be maintained properly. If there is too much water flow, the flow will be turbulent and the sound will be loud when flowing down. Conversely, if it is low, the water film will be easily cut off due to dust or paint adhering, and the paint will adhere to parts where there is no water flow. It is possible to make the device more effective by making it possible to adjust either or both of the inflow and the outflow amount to the bag.
[0012]
Further, since the water flow plate can be attached to and detached from the overflow bottle, a large working space can be secured in the inspection, maintenance or cleaning work when the operation is stopped, and the work can be facilitated.
As another means, the water flow plate in front of the coating chamber is configured in two upper and lower stages, the first stage water flow plate is arranged in front of the upper part, and the second stage water flow board is arranged in the lower rear part, and the first stage water flow is arranged. Overflowing water from the soot that has received circulating water from the pump flows to the plate, and overflow water from the soot that has received shower water from the spray nozzle provided inside the first-stage waterflow plate to the second stage waterflow plate. It is configured to flow. And between the 1st stage water flow board and the 2nd stage water flow board, the suction channel | path through which a suction airflow passes was formed in the mist process chamber. The lower end of the second stage water flow plate is positioned so as to directly flow into the water tank or to flow into the water flow flowing through the lower part.
[0013]
As a result, in addition to the effects already described, the water falling from the first stage water flow plate can be merged along the flow of the second water flow plate provided in the lower interior, The falling impact noise of water that has occurred can be greatly reduced. In general, when falling and colliding with the water surface at a substantially right angle, there are rebounds and the like, resulting in intense noise. However, according to the present invention, the noise can be prevented from being generated by merging as a flow falling downward.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view seen from the side of the painting chamber. The water tank 1 arranged at the lower part is divided into a front water tank 1A and a rear water tank 1B. A mist processing chamber 3 is provided in the central portion, and an exhaust fan 4 is attached to the upper portion thereof. A front surface of the processing chamber 3 is provided with a ridge 5 at the top, and a water flow plate 6 is suspended below the ridge 5. The water flow plate 6 is composed of an upper water flow plate 6A and a lower water flow plate 6B in consideration of manufacturing and ease of maintenance.
[0015]
The lower end of the lower water flow plate 6B is formed so that the suction port 7 is opened and the suction air flow of the exhaust fan 4 is sucked at an appropriate flow rate. The mist processing chamber 3 is a passage for the suction air flow by the exhaust fan 4, and is provided with an injection nozzle 8 for a washing shower at an intermediate portion so as to be injected toward the passing air flow.
[0016]
In the embodiment, as partially shown in FIG. 2, a plurality of injection nozzles are arranged in the left and right directions when viewed from the front of the coating chamber, and shower water is sprayed over the entire airflow passage in the processing chamber. .
Further, the injection direction is determined in an oblique direction along the guide plate 9. An eliminator 20 is provided to remove fine water droplets sucked by the exhaust fan 4 together with the flow of the airflow.
[0017]
Another lower tub 10 is provided at the tip of the washing shower injection direction, and a lower water flow plate 11 is attached as a second water flow plate, similar to the water flow plate 6 (first water flow plate) in front of the processing chamber. . The lower trough 10 is configured to overflow from the front surface, receives the shower water, and the overflowed water flows along the lower water flow plate 11. Further, drainage channels 12 are provided at both ends of the lower rod 10. The drainage channel 12 is connected to the front water tank 1A via a drainage basin 12A and via a water conduit 13 provided on both sides as shown by a chain line in FIG.
[0018]
The front water tank 1 </ b> A is raised with the front part left, forming an inclined surface 14 that reaches the lower part of the processing chamber 3, so that the shower drainage fed into the front water tank 1 </ b> A overflows and flows through the inclined surface 14. Formed. For this reason, the front water tank 1 </ b> A only needs to obtain a stable water surface with respect to shower drainage flowing in as a necessary amount of water, and is made as small as possible.
[0019]
In the apparatus shown in FIG. 1 and FIG. 2 as an embodiment of the present invention, the lower end 14A of the inclined surface 14 is dropped into the rear water tank 1B just before the lower main flow plate 11, and the water flows down into the rear water tank as it is. Have been contacted to. In addition, the bottom of the front water tank 1A is shallow, but in order to allow the water collected during cleaning to flow, a drainage means is provided, or a small drainage channel connecting the bottom and the rear water tank is formed so that it flows out when the rear water tank is drained. Anyway.
[0020]
The amount of water in the water tank is set so that the overflow from the front water tank 1A creates a flow over the entire inclined surface 14 during operation and there is no stagnation. Further, the lower end of the lower main flow plate 11 enters the rear water tank 1B, and the amount of water is adjusted so that the lower end and the water surface do not open.
The circulation flow rate of water is generally adjusted by a pump to determine an appropriate water flow and shower water, and the flow rate to the shower is adjusted by a valve provided in the supply path.
[0021]
In the other embodiment shown in FIG. 3, the inclined surface 14 reaches the lower water flow plate 11 and is configured to flow to a drain outlet provided at an end portion. In this example, the lower end of the lower water flow plate 11 is positioned so as to join the water flow on the inclined surface 14. As a result, the water flowing down gently flows without generating a collision sound, and the generation of noise can be suppressed.
The amount of water flowing down from the lower water flow plate 11 can be adjusted by adjusting the opening area of the drainage channel 12 for returning the shower water received by the eaves 10 to the water tank 1A, or adjusting the overflow water by directly adjusting the shower water amount. Can be obtained.
[0022]
The width in the longitudinal direction of the lower water flow plate 11 is set so as to sufficiently cover the width of the suction port, that is, the opening width of the coating chamber, and the overflow edge is positioned higher than the lower end 6C of the front water flow plate. The space between the front water flow plate and the front water flow plate is located close to the air flow passage area, and the curtain-like water falling from the lower end of the water flow plate is divided by the suction air flow, most of which is the lower water flow plate. Since it merges with the water flowing down at 11, the impact sound at the time of falling is reduced.
[0023]
In addition, it is considered that the internal maintenance can be easily performed by removing or opening / closing any of the water flow plates. In the embodiment, the lower water flow plate 11 is detachably hung on the overflow lower ridge, and when removed, the structure is such that it blows through from the front part to the rear part of the suction part. Therefore, it is easier to perform work during cleaning and maintenance.
In addition, although the present Example mainly demonstrated the washing-type which uses water for the capture | acquisition of mist, it replaces with water and is applied also when using a chemical | medical solution, an oil-type liquid agent, etc., and can acquire the same effect.
[0024]
【The invention's effect】
The present invention can obtain the following effects by the above configuration.
According to the present invention, in order to collect the paint mist contained in the suction airflow, the water sprayed from the washing shower is received by the scissors provided in the processing chamber, and the overflow plate is used to install the water flow plate inside. Since it is provided, the trapping effect can be improved without increasing a new pump or pumping amount, and contamination due to paint particles adhering to the inside of the processing chamber can be prevented.
[0025]
Moreover, the shower water falls directly into the aquarium, and without causing noise due to the sound falling on the water surface, the water can flow into the aquarium while continuing to flow from the water flow plate, and a quiet operation can be performed. Further, since the water flow plate also serves as the rear wall surface of the air flow passage as a mist processing chamber, removing the air flow plate causes the rear portion to be blown into the rear portion, which makes it extremely easy to perform operations such as cleaning and maintenance.
[0026]
Because the water flow plate on the front of the painting room is placed up and down and back and forth, the whole surface becomes a water flow plate up to the lower water surface, and the paint particles scattered and going to the painting room are highly likely to be thinned by the water flow plate, the whole Improve the collection efficiency. In other words, the particles that have escaped from the conventional lower suction port collide with the water flow plate 11 in the lower stage by the inertial force that goes straight in accordance with the momentum of the air current, and are taken into the water tank together with the water flowing down.
[0027]
Furthermore, since the water flowing down from the front upper water flow plate 6 merges with the water flowing through the rear water flow plate 11 so as to be attracted by the air flow, noise can be reduced as compared with the case of colliding with the wall surface.
As described above, according to the present invention, it is possible to prevent the paint chamber from adhering to the entire coating room, improve the working environment due to dirt, and maintain a clean appearance. The falling sound turns into a silent sound, reducing the noise itself and how it feels, improving the worker's environment and improving the influence on the surroundings. In addition, the cleaning structure and maintenance due to the adhesion of the paint make it extremely easy to do with the arrangement structure of the water flow plate, and the burden is greatly reduced.
[Brief description of the drawings]
1 is a cross-sectional view of a main part showing an embodiment of the present invention. FIG. 2 is a perspective view showing an internal structure of the invention. FIG. 3 is a cross-sectional view of a main part showing another embodiment of the invention. ] Cross-sectional structure diagram showing an example of a conventional washing booth for painting [Description of symbols]
1. Water tank (1A, front water tank 1B, rear water tank 3, mist processing chamber 6, water flow plate 7, suction port 8, shower nozzle 10, lower trough 11, lower water flow plate 12, drainage channel 13, water conduit 14, slope Surface 15, drain outlet

Claims (7)

A water-washing type in which paint mist is sucked from the suction port at the lower front of the painting chamber by an air flow from the exhaust fan, guided to the mist processing chamber, and a water-washing shower is injected into the mist-containing airflow passing through the mist processing chamber to capture the paint mist. In the painting booth, a tub that receives the sprayed shower water is provided, a part of the shower water is returned to the water tank, and the rest is overflowed along the longitudinal direction of the tub, and flows down from the water flow plate that forms the vertical surface. Water-washing painting booth. The apparatus according to claim 1, further comprising means for adjusting the amount of shower water or a means for adjusting a flow path for returning to the water tank so that the flow rate is sufficient and appropriate for forming a water film when overflow water flows down to the water flow plate. Water-washing painting booth. The water-washing type painting booth according to claim 1 or 2, wherein the water flow plate is detachable from an overflow bottle. The water-washing type painting booth according to any one of claims 1 to 3, wherein a guide is provided so that the shower water falls into an overflow bowl. The water flow plate provided on the front surface of the coating chamber facing the spraying direction of the paint is composed of two upper and lower stages, the first step water flow plate is arranged in front of the upper part, and the second stage water flow plate is arranged in the lower rear, Overflow water from the soot that has received circulating water from the pump is allowed to flow through the first stage water flow plate, and soot that has received shower water from the spray nozzle provided inside the first stage water flow plate. A flush-type paint booth using a two-stage water stream made by flowing overflow water. A suction passage through which the suction airflow passes is formed in the mist processing chamber between the first-stage water flow plate and the second-stage water flow plate, and the lower end of the second-stage water flow plate continuously flows into the lower water flow or the water tank. The water-washing type painting booth according to claim 5 constituted so that it may do. The coating booth according to any one of claims 1 to 6, wherein a mist capturing liquid is used instead of water.

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