JPS646935Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water supply amount control device for a water supply gutter provided in an exhaust chamber of a painting booth.

2. Description of the Related Art Conventionally, a painting booth as shown in FIG. 2 has been used when painting an object to be painted, such as an automobile body, while being continuously conveyed by a conveyor or other conveyance device.

In FIG. 2, 51 is a paint booth formed in a tunnel shape, and this paint booth 5
1 is formed into three chambers: an air supply chamber 52, a painting chamber 53, and an exhaust chamber 54. The air supply chamber 52 and the painting chamber 53 are separated by a filter 55 that removes fine dust.
The painting chamber 53 and the exhaust chamber 54 are separated by a screen 56.

A conveyor 57 is installed in the longitudinal direction on the upper surface of the bamboo basket 56, and rails 58, 58a are installed on both sides of the conveyor 57. and,
Automatic painting machines 59, 59a such as painting robots are arranged on both sides of the painting room 53, and these automatic painting machines 59, 59a are provided with spray guns 60, 60a, respectively.

Further, water supply gutters 61, 61a are arranged horizontally on both side walls of the exhaust chamber 54 in the longitudinal direction, and inside the water supply gutters 61, 61a, there are water supply gutters 61, 61a that extend downward on opposite sides. flow plate 6
2, 62a are provided. And exhaust chamber 5
4 is connected to an exhaust duct 64 having an exhaust fan 63, and an air conditioner 65 is connected to the air supply chamber 52.
and an air supply duct 67 having an air supply fan 66 are arranged in series.

When painting the automobile body W, conditioned air adjusted to a predetermined temperature and humidity by an air conditioner 65 is supplied to the air supply chamber 52 by an air supply fan 66, and is also passed through a filter 55. Painting room 53
The exhaust fan 63 supplies paint mist that has not been applied to the vehicle body W together with this conditioned air to the exhaust fan 63.
is discharged into the exhaust chamber 54, and the exhaust chamber 5
Water H flowing on the flow plates 62, 62a of No. 4
Paint mist is removed from the conditioned air by contact with the air conditioner.

However, in such a painting booth, the conditioned air passed through the screen 56 from the painting room 53 and discharged into the exhaust chamber 54 is brought into contact with the water H flowing on the flow plates 62, 62a, and the paint mist is captured. The water supply gutter 6 may become dirty due to dirt, etc. in the water supply system that supplies water to the water gutter 61, 61a.
When the amount of water supplied to the flow plates 62, 61a decreases, the amount of water flowing onto the flow plates 62, 62a decreases, resulting in a problem that the paint mist capture efficiency is significantly reduced.

This invention was developed to solve the above-mentioned problems, and its purpose is to install a liquid level sensor at the top of the water supply gutter, detect the water level of the water supply gutter, and keep the water flow constant at all times. An object of the present invention is to provide a water supply amount control device for a painting booth that can improve the capturing efficiency of paint mist.

The above purpose of this invention is to reduce the space inside the painting booth.
forming three chambers, an air supply chamber, a painting chamber, and an exhaust chamber, sequentially from above, with the filter and the screen as boundaries, and water supply gutters are arranged on both side walls of the exhaust chamber in the longitudinal direction of the exhaust chamber, In a painting booth that is provided with flow plates that are inclined on opposite sides of the water supply gutter, a liquid level sensor is disposed above the water supply gutter in the exhaust chamber, a water supply pipe is connected to the water supply gutter, and a water supply pipe is connected to the water supply gutter. , a pump is provided in the middle, and a liquid level controller for converting into a rotation speed control signal is also provided outside the painting booth, and the input side of this liquid level controller is connected to the output side of the liquid level sensor. This is also achieved by a water supply amount control device for a painting booth, characterized in that the output side is connected to a drive source that controls the rotation speed of the pump.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a schematic front view of a water supply amount control device for a painting booth according to the present invention. In Figure 1, 1
is a painting booth formed in the shape of a tunnel, and the space inside this painting booth 1 is formed into three rooms in sequence: an air supply chamber 2, a painting chamber 3, and an exhaust chamber 4. 3 is divided by a filter 5 for removing fine dust, and the painting chamber 3 and exhaust chamber 4 are divided by a screen 6 as a boundary.

An air supply duct 7 is connected to the air supply chamber 2, and an air supply fan 8 and an air conditioner 9 are connected to the air supply duct 7. Also, painting room 3
A conveyor 10 is installed on the upper surface of the screen 6 in the longitudinal direction of the central part of the painting room 3, and on this conveyor 10, an automobile body W, which is an object to be painted, is placed and conveyed. A plurality of dogs 12 are provided to be hooked to a trolley 11 for use.

Additionally, rails 13 are provided on both sides of the conveyor 10.
13a has been laid, and this rail 13, 13
The carriage 11 is guided by a. Further, a painting operator Y is placed on the sides of both rails 13, 13a, and this painting operator Y has a spray gun 14 that sprays paint toward the vehicle body W.

Further, on both side walls 1a inside the exhaust chamber 4, water supply gutters 15, 15a whose cross section is shaped like a mold are provided horizontally along the longitudinal direction of the exhaust chamber 4.
Inside the water supply gutters 15 and 15a, there are flow plates 1 that are inclined downward on opposite sides.
6, 16a are provided. When painting the automobile body W, water H is supplied from the water supply gutter 15, 15a.
overflow the flow plates 16, 16.
The paint mist is captured while being brought into contact with the conditioned air containing the paint mist discharged from the painting room 3.

Further, an exhaust duct 17 is connected to the exhaust chamber 4, and one end of the exhaust duct 17 is open to the atmosphere. An exhaust fan 1 is located in the middle of this exhaust duct 17.
8 is provided, and this exhaust fan 18 sucks in the conditioned air from the painting room 3 and discharges it to the outside.

Further, liquid level sensors 19, 19a are disposed above the water supply gutter 15, 15a, and these liquid level sensors 19, 19a are located on the lower surface of the screen 6 disposed at the boundary between the painting chamber 3 and the exhaust chamber 4. is supported by contactor 2
0 and 20a come into contact with the water surface of the water supply gutter 15 and 15a. In addition, water supply gutter 15, 15a
One end of the circulation pipe 21, 21a which is a water supply pipe is connected to the circulation pipe 21, 21a.
The other end is connected to the vicinity of the bottom 4a of the exhaust chamber 4. Furthermore, circulation pumps 22, 22a are provided in the middle of the circulation pipes 21, 21a,
The circulation pumps 22, 22a are equipped with a drive motor 2 that controls the rotation speed of the circulation pumps 22, 22a.
3, 23a are provided. The circulation pumps 22, 22a are driven by the drive motors 23, 23a.
rotates, and the water H stored in the bottom 4a of the exhaust chamber 4 is transferred to the circulation pipes 21, 21a, the water supply gutter 15,
15a, flow plates 16, 16a and bottom 4a.

Also, liquid level controllers 24, 24a for converting into rotational speed control signals are installed outside the painting booth 1, and the input sides of the liquid level controllers 24, 24a are connected to a screen by conductive wires 25, 25a. It is connected to the output side of liquid level sensors 19, 19a supported on the lower surface of 6, and the output side is connected to conductors 25b, 25c.
are connected to drive motors 23, 23a provided in the circulation pumps 22, 22a. Contactors 20, 2 of the liquid level sensors 19, 19a
0a is in contact with the water surface of the water supply gutter 15, 15a at a predetermined height, the drive motors 23, 23a of the liquid level controllers 24, 24a and the circulation pumps 22, 2
2a operates constantly to maintain a constant water level. Further, when the water surface of a predetermined height is separated from the contactors 20, 20a, the rotation speed of the drive motors 23, 23a is increased by the liquid level controllers 24, 24a, and the water is stored in the bottom 4a of the exhaust chamber 4. A large amount of water H is circulated through the circulation pipes 21 and 21a, the water supply gutters 15 and 15a, the flow plates 16 and 16a, and the bottom portion 4a.

In the paint booth water supply amount control device configured as described above, the air supply fan 8, air conditioner 9, and exhaust fan 18 are activated at the same time as the paint booth 1 starts operating. Outside air is introduced into the air conditioner 9 by the operation of the air supply fan 8, and at the same time, the circulation pumps 22, 22a are operated to supply water to the water supply gutter 1 of the exhaust chamber 4.
Water H overflows from the flow plates 5 and 15a and flows out to the flow plates 16 and 16a, forming a water film. Then, the outside air introduced into the air conditioner 9 is cleaned of dust, adjusted to a predetermined temperature and humidity, and then supplied to the air supply chamber 2. It also passes through the filter 5 and is evenly supplied to the painting chamber 3. .

Further, the automobile bodies W on the trolley 11 that have been transported by the conveyor 10 are carried into the painting room 3 from the entrance thereof. When the automobile body W is transported to the vicinity of the painting worker Y who is placed on both sides of the painting room 3, the paint is sprayed by the spray gun 14 held by the painting worker Y to form a coating film. is formed. In this way, the automobile body W
While being conveyed by the conveyor 10, the paint is sprayed on the paint to complete the coating, and the paint is conveyed from the outlet of the painting room 3 to the next process.

Furthermore, the paint mist that is scattered during the painting of the automobile body W passes through the filter 5 from the air supply chamber 2 and the conditioned air that is evenly supplied to the painting room 3, and passes through the screen 6 to the exhaust chamber 4. be discharged. The conditioned air containing the paint mist discharged into the exhaust chamber 4 overflows from the water supply gutter 15, 15a and forms a water film flowing on the flow plates 16, 16a, forming a water film at the tips of the flow plates 16, 16a. The paint mist is removed from the conditioned air by violent contact with the paint mist, and is also discharged to the outside from the exhaust duct 17 by the exhaust fan 18.

And when painting the car body W, Kanoko 6
Liquid level sensors 19, 19a provided on the lower surface of
The water surface of the water supply gutter 15, 15a is detected by , liquid level sensor 19,
A signal from 19a is transmitted to the liquid level controllers 24, 24a, and the operations of the liquid level controllers 24, 24a, drive motors 23, 23a, and circulation pumps 22, 22a are maintained in a steady state, and the water supply gutter 15, 15a is The supply of water H is kept constant. In addition, water supply gutter 1
5, 15a decreases due to some accident and the water surface of a predetermined height is separated from the contacts 20, 20a of the liquid level sensors 19, 19a, the liquid level is Controller 2
The signal is transmitted to the liquid level controllers 24 and 24a, and the liquid level controller 24 and 24a converts the transmitted signal into a rotation speed control signal.

The converted rotation speed control signal is then transmitted to the drive motors 23, 23a of the circulation pumps 22, 22a, and the rotation speeds of the drive motors 23, 23a are increased, and the supply capacity of the circulation pumps 22, 22a is increased. increases. As a result, the water H stored in the bottom 4a of the exhaust chamber 4 is transferred to the circulation pipes 21 and 2.
A large amount of water is supplied from 1a to the water supply gutter 15, 15a, and overflows to the flow plate 16,
It flows down and circulates to the bottom 4a while forming a water film on the top 16a.

As explained above, in the water supply amount control device for a painting booth of the present invention, a liquid level sensor is provided at the top of the water supply gutter installed on both side walls of the exhaust chamber.
Since this liquid level sensor detects the water surface of the water supply gutter, the amount of water flowing on the flow plate can be kept constant, which increases the efficiency of capturing paint mist discharged from the painting room. There are effects that can be significantly improved.

Furthermore, the present invention has the effect of improving the degree of cleanliness of the conditioned air discharged from the exhaust chamber by improving the paint mist trapping efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic cut-away front view showing a water supply amount control device for a paint booth according to the present invention, and FIG. 2 is a cut-away schematic front view showing a conventional paint booth. 1...Painting booth, 1a...Side wall, 2...Air supply room, 3...Painting room, 4...Exhaust chamber, 4a...Bottom, 5...Filter, 6...Banko, 7...Air supply Duct, 8...Air supply fan, 9...Air conditioner,
10... Conveyor, 11... Trolley, 12... Dog, 13, 13a... Rail, 14... Spray gun, 15, 15a... Water supply gutter, 16, 16a...
...Flow plate, 17...Exhaust duct, 18...
...Exhaust fan, 19, 19a...Liquid level sensor, 2
0, 20a... Contact, 21, 21a... Circulation pipe, 22, 22a... Circulation pump, 23, 23
a... Drive motor, 24, 24a... Liquid level controller, 25, 25a, 25b, 25c... Leading wire.

Claims (1)

[Scope of utility model registration request] The space inside the painting booth is formed into three rooms, an air supply chamber, a painting chamber, and an exhaust chamber, sequentially from above, with the filter and screen as boundaries, respectively, and water is supplied to both side walls of the exhaust chamber in the longitudinal direction of the exhaust chamber. In a painting booth that is provided with a gutter and flow plates that are inclined on opposite sides of the water gutter inside the water gutter, a liquid level sensor is disposed above the water gutter in the exhaust chamber, and a liquid level sensor is provided in the water gutter in the exhaust chamber. In addition to connecting the water supply pipe, a pump is installed in the middle of the pipe, and a liquid level controller that converts into a rotation speed control signal is installed outside the painting booth, and the input side of this liquid level controller is connected to the liquid level sensor. A water supply amount control device for a painting booth, characterized in that the water supply amount control device is connected to an output side of the pump, and the output side is connected to a drive source that controls the rotation speed of the pump.