JPH0560553U - Paint mist removal device - Google Patents

Abstract

(57) [Abstract] [Purpose] After passing the paint mist-containing gas Ar and the cleaning liquid Ws at a high speed in a confluent state, the confluent fluid is discharged from the discharge port 11
The cleaning channel 13 is provided for discharging the exhaust gas into the exhaust chamber 12 toward the side wall 19 of the exhaust chamber 12. In the paint mist removing device provided with the overhanging floor section 20, the adhesion and deposition of the paint dregs in the exhaust chamber 12 is reduced. [Structure] A deflection guide surface 22a for diverting the cleaning liquid We discharged from the discharge port 11 obliquely downward is provided. The deflection guide surface 22a is arranged so as to intensively collide with the lower end of the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a cleaning flow path is provided, in which a paint mist-containing gas and a cleaning liquid are passed at a high speed in a combined state, and then the combined fluid is discharged from the discharge port toward the side wall of the exhaust chamber into the exhaust chamber. The present invention relates to a paint mist removing device having a cleaning liquid receiving tank at the bottom of an exhaust chamber and an overhanging floor portion protruding from the lower end of the side wall toward the cleaning liquid receiving tank.

[0002]

[Prior Art]

 The paint mist removing device described above (see FIG. 4) causes the paint mist containing gas Ar to be trapped in the cleaning liquid Ws by passing the paint mist-containing gas Ar at high speed through the cleaning flow path 13 in a state of being joined with the cleaning liquid Ws. To remove the paint mist from the gas Ar, and the gas Ae from which the paint mist has been removed is discharged from the discharge port 11 of the cleaning channel 13 into the exhaust chamber 12, and then appropriately discharged from the exhaust chamber 12 by the exhaust means. On the other hand, the cleaning liquid We that has captured the paint mist is discharged from the discharge port 11 of the cleaning flow path 13 into the exhaust chamber 12 and then collected in the cleaning liquid receiving tank 17 at the bottom of the exhaust chamber.

Further, from the viewpoint of suppressing the scattering of the cleaning liquid to the eliminator 15 with respect to the gas Ae after the paint mist is removed, the discharge direction of the discharge port 11 in the cleaning flow path 13 is the direction toward the side wall 19 of the exhaust chamber 12. It was done.

By the way, conventionally, in this type of paint mist removing apparatus, as shown in FIG. 4, the paint mist trapping cleaning liquid We discharged from the discharge port 11 of the cleaning flow path 13 and the side wall 19 of the exhaust chamber 12 is used. No consideration was given to diverting the discharge cleaning liquid We in the process of scattering in the exhaust chamber 12 so that the discharge cleaning liquid We would be intensively collided with a predetermined portion of the bottom, and from the discharge port 11 to the side wall 19 of the exhaust chamber 12. The discharged cleaning liquid We was in a scattered state and directly collided with the side wall 19 of the exhaust chamber 12.

[0005]

However, in the above-mentioned conventional device, the paint mist trapping cleaning liquid We collides with a wide portion of the exhaust chamber side wall 19 in a scattered state, so that the paint residue (the trapping coating liquid) in the cleaning liquid We is captured. Minute) adheres and deposits over a wide portion of the side wall 19 of the exhaust chamber, and not only that, but also overhangs the floor portion 20 (which extends from the lower end of the side wall 19 toward the cleaning liquid receiving tank 17 at the bottom of the exhaust chamber). In general, it is also used as a step for the manhole 21 on the side wall 19), and a large amount of paint slag is also generated, which frequently requires cleaning maintenance to remove the adhered and accumulated paint slag, and its cleaning maintenance. There was a problem that requires a lot of labor and cost.

An object of the present invention is to redirect and guide the paint mist trapping cleaning liquid discharged from the discharge port of the cleaning flow path toward the side wall of the exhaust chamber in a rational form to thereby remove the coating residue in the exhaust chamber. The point is to effectively reduce the adhesion and deposition.

[0007]

[Means for Solving the Problems]

 The characteristic feature of the paint mist removing device according to the present invention is that the paint mist-containing gas and the cleaning liquid are passed at a high speed in a combined state, and then the combined fluid is discharged from the discharge port toward the side wall of the exhaust chamber and into the exhaust chamber. In a configuration in which a cleaning flow path is provided, a cleaning liquid receiving tank is provided at the bottom of the exhaust chamber, and a bulging floor portion protruding from the lower end of the side wall to the cleaning liquid receiving tank side is provided, the cleaning liquid discharged from the discharge port is provided. Is provided so that the cleaning liquid deflected obliquely downward is provided so that the cleaning liquid deflected by the deflection guide surface concentrates on the lower end of the side wall near the upper part of the overhanging floor. Since the direction guide surface is arranged, its operation and effects are as follows.

[0008]

[Action]

 That is, in the above-described characteristic configuration (see FIG. 1), the discharge cleaning liquid We from the discharge port 11, that is, the paint mist capturing cleaning liquid We is deflected obliquely downward by the deflection guide surface 22a. The discharge cleaning liquid We is prevented from colliding in a scattered state over a wide portion of the exhaust chamber side wall 19, thereby preventing adhesion and deposition of paint slag on the exhaust chamber side wall 19.

By the way, in diverting the discharge cleaning liquid We in a diagonally downward direction as described above, as to which part of the exhaust chamber 12 the cleaning liquid We after collision should collide with, for example, as shown in FIG. When the deflection guide surface 22a is arranged so as to impinge the cleaning liquid We on the upper surface of the overhanging floor portion 20, a swirling flow of the collision cleaning liquid We occurs at the corner between the side wall 19 and the overhanging floor portion 20. In addition, when a large amount of paint slag is accumulated at its corners, and as shown in FIG. 3, when the deflection guide surface 22a is arranged so as to directly introduce the cleaning liquid We into the receiving tank 17, the receiving tank 22a Since the scattered cleaning liquid due to the collision between the stored cleaning liquid We and the input cleaning liquid We in 17 or a part of the scattering cleaning liquid during the charging process reaches the overhanging floor part 20, again, a large amount of the paint residue is accumulated on the overhanging floor part 20. Raw I'm going to get it.

On the other hand, in the above-mentioned characteristic configuration of the present invention, the cleaning liquid We deflected by the deflection guide surface 22a collides intensively with the lower end portion of the side wall 19 near the overhanging floor portion 20. By disposing the deflecting guide surface 22a on the side wall, the washing liquid collision on the side wall 19 is caused by the washing action of the washing liquid We 1 itself which is concentrated and colliding (that is, the washing action in the process from the concentrated collision to the receiving tank 17). It prevents the deposition and deposition of the coating material at the position, and the deposition of the coating material at the corners of the side wall 19 and the overhanging floor portion 20 and on the upper surface of the overhanging floor portion 20.

[0011]

[Effect of the device]

 As a result of the above operation, according to the characteristic configuration of the present invention, it is possible to effectively prevent the adhered and accumulated paint slag in the exhaust chamber, and the required frequency of cleaning maintenance to remove the adhered and accumulated paint slag, and the labor required for it.・ Cost can be reduced significantly.

[0012]

【Example】

 Next, examples will be described.

In FIG. 1, 1 is a coating booth, 2 is a conveyor for transporting the object 3 to be coated in the booth, and 4 is a coating device for automatically spray-coating the object 3 to be coated.

The ceiling of the tunnel-shaped coating chamber 5 in the booth is a ceiling outlet 6 that blows out the ventilation air As downwards from almost the entire surface, and the floor of the coating chamber 5 is the interior of the coating chamber 5. With the lattice floor 7 that allows passage of the air Ar downward, the surplus air drifting in the coating chamber 5 with the blowout of the exchanged air As from the ceiling outlet 6 and the exhaust of the room air Ar through the lattice floor 7. The sprayed paint mist is discharged from the coating chamber 5 together with the indoor air Ar.

Below the lattice floor 7, there is provided a downflow plate 9 for flowing down the wash water Ws overflowing from the overflow gutter 8 toward a central portion in the width direction of the booth, and between the downstream end edges of the left and right downflow plates 9. Is provided with a slit-shaped opening 10 extending in the longitudinal direction of the booth, and this slit-shaped opening 10 functions as a suction / exhaust port for the coating chamber 5.

Then, the indoor air Ar sucked from the slit-shaped opening 10, that is, the paint-mist-containing air Ar, passes at a high speed in a state of being merged with the cleaning water Ws flowing into the slit-shaped opening 10 from the downstream edge of the falling plate 9. Then, a cleaning flow path 13 for discharging the combined fluid from the discharge port 11 into the exhaust chamber 12 below the flow-down plate 9 is provided, and in the course of passing through the cleaning flow path 13, the paint mist in the air Ar is washed with the cleaning water Ws. To remove the paint mist from the air Ar.

The exhaust chamber 12 is connected to the exhaust duct 14 at one end side in the width direction of the booth, and an eliminator 15 is provided in the exhaust chamber 12 in the air path toward the exhaust duct 14, and the discharge port 11 of the cleaning flow path 13 is provided. The air in the combined fluid discharged from the exhaust chamber 12 into the exhaust chamber 12, that is, the air Ae from which the paint mist has been removed, is drained by the eliminator 15 and then led out from the exhaust chamber 12 to the exhaust duct 14 by the exhaust fan 16. Discharge to the outside.

On the other hand, the cleaning water of the combined fluid discharged from the discharge port 11 of the cleaning flow path 13 into the exhaust chamber 12, that is, the cleaning water We trapping the paint mist, is received at the bottom of the exhaust chamber 12. After being received in the tank 17, the paint residue removal device 18 separates and removes the contained paint residue (captured paint component) and returns it to the overflow gutter 8 for reuse.

The discharge port 11 of the cleaning flow path 13 is opened toward the exhaust chamber side wall 19 on the side opposite to the side where the exhaust duct 14 is connected, whereby the cleaning water We discharged from the discharge port 11 reaches the eliminator 15. On the other hand, the dripping load of the eliminator 15 is prevented from being excessively increased by the direct scattering, and the paint deposit in the cleaning water in the eliminator 15 is prevented from adhering to the eliminator 15.

Further, on the side wall 19 of the exhaust chamber opposite to the side where the exhaust duct 14 is connected, the overhanging floor portion 20 that extends from the lower end thereof to the receiving tank 17 side is used as a step in the exhaust chamber. A manhole 21 for maintenance of the exhaust chamber in a state of being provided is provided.

Reference numeral 22 denotes a guide plate that collides the discharge cleaning water We discharged from the discharge port 11 with one surface and changes it obliquely downward. The cleaning water We discharged from the discharge port 11 toward the side wall 19 is discharged from the side wall 19. Collision in a scattered state over a wide area is prevented by the deflection by the guide plate 22. As a result, paint deposits are deposited and deposited on the wide area of the side wall 19 including the manhole 21 due to the scattering collision of the cleaning water We. Prevent.

Further, the surface of the guide plate 22 on which the discharged cleaning water We collides, that is, the deflecting guide surface 22a, has a side wall near the above-mentioned overhanging floor portion 20 where the cleaning water We deflected by the collision. It is arranged so as to intensively collide with the lower end portion of 19 so as to have a washing action of the washing water We itself that collides intensively (that is, a washing action in the process from the concentrated collision to the flow into the receiving tank 17). It prevents the buildup of paint dregs on the side wall 19 at the cleaning liquid collision position, and the buildup of paint dregs at the corners between the side wall 19 and the overhanging floor part 20 and on the upper surface of the overhanging floor part 20.

Since the discharge cleaning water We strongly collides with the deflection guide surface 22a, the coating residue adheres to the deflection guide surface 22a itself by the flushing action of the collision cleaning water We itself as in the above. Deposition is also prevented.

Further, the cleaning water We discharged from the discharge port 11 together with the air Ae is mixed with water discharged in the state of large-sized water droplets and water discharged in the state of fine water droplets. By colliding with the deflection guide surface 22a with a strong force, the droplets are made into a water film on the deflection guide surface 22a, and after being discharged from the discharge port 11, fine water droplets reaching the eliminator 15 in a state of being carried by the air flow. The amount of water drainage can be reduced, and thus the drainage load of the eliminator 15 can be further reduced.

[Other Embodiments] Next, other embodiments will be listed.

The member structure for forming the deflection guide surface 22a in the exhaust chamber 12 can be modified in various ways, and the deflection guide surface 22a itself has a refracting surface shape as in the above-described embodiment. Instead of adopting, it is also possible to adopt a simple planar shape or a curved surface shape.

The corners of the side wall 19 and the overhanging floor portion 20 may have an arc-shaped cross-sectional shape to facilitate the flow of the cleaning liquid.

The formation of the manhole 21 on the side wall 19 may be omitted, or the manhole may be formed at another place.

The gas Ar from which the paint mist is to be removed and the cleaning liquid Ws are not limited to air and water, respectively.

In the claims of the utility model registration, reference numerals are given for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment.

FIG. 2 is a partial cross-sectional view showing a comparative example.

FIG. 3 is a partial cross-sectional view showing another comparative example.

FIG. 4 is a sectional view showing a conventional example.

[Explanation of symbols]

 11 Discharge Port 12 Exhaust Chamber 13 Cleaning Flow Path 17 Cleaning Liquid Receiving Tank 19 Side Wall 20 Overhanging Floor 22a Diversion Guide Surface Ar Paint Mist-Containing Gas Ws, We Cleaning Liquid

Claims (1)

[Scope of utility model registration request] 1. A paint mist-containing gas (Ar) and a cleaning liquid (Ws) are passed through at high speed in a combined state, and the combined fluid is discharged from a discharge port (11) to a side wall (19) of an exhaust chamber (12).
A cleaning channel (13) for discharging into the exhaust chamber toward
A cleaning liquid receiving tank (17) is provided at the bottom of the exhaust chamber (12).
A paint mist removing device provided with a bulging floor (20) protruding from the lower end of the side wall (19) to the cleaning liquid receiving tank (17) side. A deflection guide surface (22a) for deflecting the discharged cleaning liquid (We) obliquely downward is provided, and the cleaning liquid (We) deflected by the deflection guide surface (22a) is located above the overhanging floor (20). In order to collide intensively with the lower end of the side wall (19), the turning guide surface (22
A paint mist removing device in which a) is arranged.