DE8000588U1 - Paint spray booth - Google Patents

Description

■ * · ♦

. J

CABHIER DRXSSYS '· 7570/80 * " ^: ·'··" ··

"Paint spray booth"

This invention relates to a paint spray booth, in particular to sound-absorbing systems for the Fajr spray booth

Conventional spray booths generally include an enclosed chamber through which the spray booths Articles are directed. The working floor of the cabin consists of a flat grid with a sub-floor underneath. The subfloor becomes during operation the cabin is constantly under water, and the water is passed through an or along with the color-laden air several openings in the sub-floor. This discharge device consists either of a continuous slot or of several drainage pipes that are laid in the subfloor at intervals along the center line of the cabin. . .

The turbulence generated during the passage through the one or more openings in the air and in the water supports the transfer of the solid color particles from the air into the water, from which they are then removed in a suspension taak or a similar treatment device.

CARRIER LRYSYS ": I & Q / M Ί

However, this turbulence also generates a certain amount of noisej other noises are generated by the fans, which are always on, which are supposed to remove the air from the cabin. Consequently the noise level inside the cabin can be considerable.

The present invention has set itself the task of a device for lowering the noise level in a parquet booth equipped with a cleaning part to accomplish.

According to the present invention is a paint spray booth present, consists of the following parts: a closed, Chamber surrounding the work area, a perforated work floor, a device for bringing up Of air for the field of work and for the creation of one downward through the perforated floor, one below the perforated work floor at a certain distance located sub-floor, a device for constant rinsing of the sub-floor with a cleaning fluid and one or more openings in the underbody through which the rinsing fluid and the air can be withdrawn. You eats according to the invention characterized in that a sound-absorbing device for lowering the noise

t * 4

GARRIEE 739 /

- 10 -

level is provided within the work area during operation of the cabin, the sound-absorbing Device is arranged under the perforated work floor and sound-deflecting baffles and acoustical attenuating material disposed adjacent at least one of its surfaces.

As will be described further below, multiple configurations of the sound attenuating devices are possible after äev invention and the embodiments and the location of these devices depend on the design and the sound damping requirements of the respective Färbspritzkabine from.

In one form, the sound attenuation device comprises one or more baffles in a tree between the Work floor and the sub-floor} the baffle plate or plates are provided with an applied to a surface Layer of sound absorbing material. This or each baffle is arranged so that the sound-absorbing material on the lower surface of the baffle of the opening or openings in the sub-floor is opposite.

Appropriately, the baffles comprise inverted channel-shaped ropes, the acoustic material in housed in the canals) these (parts

OUUU

* 4ItI I I I I I ι

<> '··· «I« II Il (I

ViCiBiB 7370 / QO

- 11 -

either βο arranged DAA abut their velvets or have a certain Abitand from each other, keep low au to the resistance against the air flow, "You can extend over the whole lateral or longitudinal extent of the cabin or where a number are provided by Abeugsöffnungen immediately in groups be attached over each opening

In a preferred embodiment a plurality of baffle plates are mounted at a distance from one another and extend transversely to the longitudinal en i & ttelliiiie the cabin with their longitudinal öind arranged in a substantially horizontal plane. These baffles are best inclined laterally around their longitudinal axis in such a way that they create a slat flap and thereby reduce the resistance to the air flow to a minimum.

Advantageously, the exposed surface of the sound-absorbing material is covered with a lower wall made of perforated sheet metal, which holds the sound-absorbing material in its position on the ball-reflecting baffle and there is a risk of getting wet

• ■ «'r a

• i * i .i. .;.

DHXfflffl 7370/80

- 12

dee material decreased. The perforation in the cover plate should allow the sound to pass through the soundproofing material and into the soundproofing material. In a further embodiment of the invention, a protective cover of water-impermeable material is provided optionally or in addition to the perforated plate _{9 to} prevent the soundproofing material from getting wet during operation. This is because getting wet as a result of the rinsing water penetrating the sound-absorbing material considerably reduces the performance of the material during operation.

You use of the sound attenuation device in the foxm described above has proven valuable to reduce the noise level inside the cabin by at least 3 dB (A)

if the booth with vent openings running at certain intervals along the longitudinal axis of the booth is provided, the sound-damping device can particularly reduce the amount emitted through these openings Noise can be constructed.

In such an arrangement, the sound attenuation device comprises individual, above one or more, openings in the space between the sub-floor and the work floor lying silencers.

$ άέό} 1

-13 -

In principle, every silencer has a baffle plate ^ 2.B «made of sheet metal in a generally pyramidal or conical outer casing j however can be any Shape to be used «the oak tapers upwards, B.B, a truncated cone or a hemisphere or a combination of the different shapes

The housing forms a cladding, the cross-section of which tapered upwards and which is open at the bottom « The acoustic material is used in the interior of the cladding placed where it can be held in place by perforated sheets.

It is best that the diameter or width of each muffler is slightly larger than that at its base Diameter or the width of the corresponding opening, so that as much as possible of what is obtained here Noise is covered.

In all of these embodiments described above, best connected to each soundproofing device devices supplying liquid (e.g. water), which can give ßpüliquid on the upper surface of the baffle plates during operation to remove the contamination the upper surface with solid paint particles to prevent.

i t ·· * Il U |

ti * «» «it« «ti

- 14 -

The use of one © Inen silencer or para andexen above bumpers described reduced 4ea noise level in the cabin during dee operation to a considerable, since the combination of Schalldämpfungematerial and Prailbleoh as a barrier of the opening or openings in the Unterbodea serves Gert ink generated.

It has been found that when the openings have a Have a suitable shape and in outlet designs end with wall sections going down, a similar reduction in noise level can be achieved if the soundproofing device is guided around the outer surfaces of the wall parts themselves «

Accordingly, in another embodiment, this has Invention of the sound-reflecting baffle Form of an outer, the corresponding lexle whole £ äer partially surrounding jacket and the soundproofing material is in between the outer dumbbell and the Wall parts housed lying tree · To do this, the wall parts must either be perforated or made from be made of a sound permeable material.

Il · "*

GAHHIEE DEYSYS

Such an arrangement is particularly effective, when the Outlets consist of individual outlet pipes. Advantageously the Eohr itself is made of perforated sheet metal so that the noise in the sound-absorbing Material can penetrate. Between the walls of the ear and the sound-absorbing material can be a waterproof Membrane can be provided to prevent wetting of the material during operation.

This design of the sound attenuation device is very effective in reducing the noise level in the cabin.

Since the baffle is not installed in the tree between the work floor and the sub-floor, it hinders also not the air flow to the bores and is not contaminated with paint during operation. In addition, with this arrangement there is less need to change the internal construction of the cabin.

Optionally or in addition to the watertight covering , each downwardly hanging wall part can be formed from sheet metal, which is bent around the openings therein so that the liquid flowing down through the opening in question does not penetrate through these openings.

fl Il Il Il ·· «·« · Il

I * I If 9 * I * # * · Il

I Il Il Il I Ii * ♦ t

I * I Il Il I · * · «I

W Il H Hit. ti I «

CABHIER DHrSXS 7370/80 · '"' * ^: * '··"··' ^/ ^

- 16 -

The invention also creates an exterior construction for the underbody of a paint spray booth as described above has been described.

For a better understanding of the invention are now by way of example and with reference to the attached Drawing some embodiments according to the invention described in more detail.

Fig. 1 shows a perspective view, partially in section, of a spray booth flushed with water with a soundproofing device according to FIG the invention.

Fig. 2 is an enlarged vertical cross-section of an exhaust pipe and associated muffler the cabin according to Fig. 1

Fig. 3 is a cross section through another outlet pipe

with a different form of soundproofing device, and

Figure 4 is a cross-section through one (Dell of another Outlet pipe.

Of the drawings, FIG. 1 shows a paint spray booth 8 which is suitable, for example, for motor vehicles and which comprises the following ropes ι a sheathed chamber 10 ″ bounded by the walls 11,

'",' · <" I ι ι ι ι Ii Il * '· Il Il ι Il Ii ι

••• III !! I I I I I

· * · ■ Il Il III Il ti

DHXBTB 7370 / eq :, ': _#> : ^ ^

- 17 -

a ceiling I3 and one from an open grid existing work floor 14. The walls are with the Windows 12 and the skylights 15 provided the air supply into the interior of the chamber takes place through the line 16 and the adjustable plates I7.

The Sabine 8 is in the known way with a Sub-floor 20 located at certain distances under the working floor 14 is provided. The sub-floor consists of two inclined flat surfaces 21,22, the lower towards the center line of the car 8. During the operation of the cabin 8, these areas are 21, 22 constantly wetted by water pipes 23 placed at intervals along the upper hand of the surfaces. You water pipes 23 stand with an upter dem Underbody 20 running channel 24 in connection.

Water and air are attached through a series of outlet structures in the form of Outlet pipes 25 removed running along the center line the cabin 8 are arranged. In the embodiment shown, these have a cylindrical cross-section, when understandably they could also have other cross-sections, e.g. rectangular or square, tind

i i ι, .ιι

• · ι ι · ι ι ι ..1!

·· ·· Il Il ill Il Il

• ■ ·· «*« »■

CARRIER DRYSYS 7370/80

- 18 -

can be equipped with a suitable device to improve their cleaning ability, e.g. shovels or baffle plates. The water flowing over the surfaces 21, 22 catches the excess paint mist passing through the work floor 14; further in the air remaining ink particles are removed by the mixture _r activity taking place within the Auslaßrchre 25th The dirty water collects in a trough formed above the base 28 and is discharged through the channels 29. The clean air is released to the outside air via the fan housing 30 and the chimney.

High levels of noise are generated from the fans in the housing 30 and also as a result of the mixing action in the outlet pipes 25. This noise can become so loud that the working conditions inside the chamber 10 become unbearable. Tests have shown that this noise essentially enters the cabin lining through the outlet pipes 25 themselves. In order to reduce the noise level inside the cabin, each outlet pipe 25 in FIG. 3 is equipped with an individual silencer 33 according to the invention.

0ABSX3BS DRXSXS

- 19 -

Siner this muffler 33 is shown in fig. 2 shown in detail. It comprises a sohall-reflecting outer dumbbell 34 of essentially conical shape forming baffle plate, which is made, for example, of mild steel and is installed in the tree ewi see working floor 14 and sub-floor 20 directly above the mouth of the outlet pipe 25 concerned.

The shape of the base of the silencer 33 corresponds best essentially to the tfoim of the Auelaßrohres 25} if the Bohr 25 ss «B. has a round cross-section, as shown in Fig. 2, the silencer 33 has a cone or truncated cone shape, the outer tube 25 is square, the silencer 33 has the shape of a four-sided pyramid ·

As from SIg. 2 can be seen, the outer ones are sufficient Edges of the damper base beyond the actual diameter of the outlet tube 25 to ensure that all noises generated by the drilling are picked up by the muffler housing

The sound-reflecting housing 34 defines a tree, which is provided with a layer of sound-absorbing acoustic material 36, which is essentially the fills the upper part of the case and reaches around at 37 lower band.

DSYSXS 7370/80 'i i ΐ * ί "ί! J

- 20 -

This matorial let, for example, loose fibrous acoustic material (such as mineral or glass fibers) is preferred, the material sold under the registered trademark ß'HLLiaas SR 10. The acoustic material 36 is held in place by means of a perforated inner wall 38, for example sheet metal, wire mesh or thin steel sheet, which is perforated to provide any free area through which the sound can penetrate. The shape of the inner wall and its free area is chosen according to the frequencies to be recorded! But the inner wall should have at least 10 % free area · If perforated sheet metal is used, the perforation should have a diameter of at least 1 mm. So 2.B. a 3 mm perforation is used at certain intervals to achieve a free area of 30% .

Me perforated wall 38 allows the sound to penetrate into the sound-absorbing material 36 where certain Frequencies are absorbed. Another absorption takes place when the sound comes from the inside of the housing 33 is reflected and fed back into the acoustic material 36.

With a suitable choice of acoustic material, selective sound frequencies can be absorbed,

t I ItI

GAJBKtEE DKXSXS 7370/80 "·

- 21 -

eo that the noise level occurring in the Sabine no over to be further reduced «

IM contamination of the outer wall of the housing 34 with solid color particles flowing in the pipe to the pipe 2 $ Irtift included to prevent is a water pipe 41 provided to the outer surface of the muffler during operation of the cabin with water to wash up "

This water pipe 41 can be connected to the channels 25 be connected under the cabin floor. If you lead the water pipe 21 to the top of the Housing 34, is a complete wetting of the Housing guaranteed.

Ifa the penetration of water into the acoustic material To prevent the interior of the housing 34, the perforated inner wall 38 terminates at one in a certain Distance from the lower edge of the housing located point 39, and the housing is bent over at the edges, to offer a job site. A wetting of the acoustic Material can be completely prevented if the inner wall 38 is on the inside or outside with a A layer of waterproof material, e.g. a flexible plastic sheet.

CULBÄEEB WCCBiB 7370 / feO'j Γ: · | · ">·."; '/ "?

I «

Each silencer is in the room awischen floor 14 and floor SO worn so that it allows great sound absorption with a minimum of resistance to airflow. Its typical position of the silencer would be 60-80 mm above the mouth of the Auelaßrohree 25.

Yig « 3 illustrates another embodiment of the sound attenuation device for a cabin similar to that in fig. 1 shown «

In this case, the outlet pipe 25 has a right angle Cross-section and the pipes are provided with a baffle plate or target plate 45 against which the air and water mixture rebounds to improve cleaning action · The outlet tube 25 includes downwardly hanging wall portions, the a straight-walled upper part 46 and a narrower lower part 47 form which are arranged in a cross shape Support plates 48 which support the baffle 45 ends. The upper straight-walled part 46 is provided with a soundproofing device provided, which consists of a baffle plate in the form of a sound-reflecting jacket 49, which is formed by an outer wall 50 that is entirely around the top 46 of tube 25, and out a lower wall 51. The continuous upper wall of the shell 50 is defined by the lower surface of the sub-floor 20 formed.

CAJlBIEE DEYSYS 7370/80

- 23 -

The jacket 49 forms with the walls 54 of the outlet pipe 25 a casing 53 J the walls 54 · are perforated in the same way as the inner wall 38 of the embodiment shown in Fig. 2, so that the sound in this enclosure can penetrate. The perforation 55 in this case has a diameter of 3 mm and the holes are in certain Spaced to give the walls 54 a 30% free area, although other sizes and Distributions are possible; for example, the walls can be made of the same material as the inner wall 38 will. The casing 53 is filled with an acoustic material 56 of the same type as that in FIG. 2 material described and shown at 36. Since a wetting of the acoustic material 56 of the If the performance is significantly reduced, the material is wrapped in a water-impermeable cover 57, e.g. made of plastic film or film material such as MELXNEX (registered trademark), which does not affect the sound absorption much, but prevents the penetration of water into the material 56.

The sound attenuation device of FIG. 3 is similar to that described in connection with FIG. The sound rising in the ear 25 penetrates through the perforated wall 54 into the sounddttapäuagematerial 56, where a hatchet is immediately absorbed by the material

I I If ti

i i / i (i

Ί "ι .:: Ί .X: i Λ

OABBIEH DBISrS 7370 ^ 60 ''"··'· ^: · ···" ·. ·

- 24 -

Noise passing through is thrown back into the material on the inner surface of the housing wall 50, where it is is further reduced. Even when using this Construction were noise level reductions of 3 dB (A) achieved} by varying the density and composition of the soundproofing material 56, selective Frequencies are absorbed. Generally speaking, very dense material is effective for absorption lower frequencies, and low density material is used to absorb the higher frequencies; therefore, a mixture of high and low density material is used for optimum performance.

The waterproof cover shown in Fig. 3 inevitably brings about a certain, albeit slight, weakening the sound attenuation properties of the acoustic material 56. You can use this envelope, however can be replaced by the use of intricate shapes of perforated metal sheets to form the down extending walls 54 of the outlet pipes 25. An example the use of such a material is shown in FIG.

In Fig. 4, the walls 54 of tube 25 are formed from sheet metal 60 provided with openings, in that the openings were originally short horizontal, in different

'' I "I ·· 4 ... ι ι Ii

CAiffiIER DHYSYB 7370/80

- 25 -

Set · vertical row arranged slots formed are. The metal between the slots is then deformed to enlarge the slots and create a row of junction plates 61 to form, of which each extends over the corresponding opening 62. The lower edge peeler plate 61 extends into the interior of the Kohrwand beyond the relevant opening 62.

During the operation of the cabin, this is in pipe 25 downward flowing water through the overhanging lower edges of the plate 61 to penetrate the wall 54- prevented.

As a result. the protective cover 57 (FIG. 3) can be omitted. It will also be understood that the downwardly directed openings 62 also help guide the upwardly through the pipe 25 to intercept sound passing through.

The walls of the tube 25 can also have other shapes perforated sheet metal can be used. For example, plates similar to plate 61 can be provided with slots are and then bent so that they overhanging semicircular "eyelids" over each Slit and similar semicircular indentations form tinter each slit that in opposite one Running direction

·· ■ · ·· ·> I> II Il II

I <· I I I) I

drysys 7370 / βρ,:. *::: -

- 26 -

It goes without saying that variations in those described here with reference to the drawings Embodiments are possible. For example, it is not essential that the jacket 50 and muffler material be used go all the way around tube 25} you can instead only partially go around the tube 25, e.g. on two opposite sides, with only those Wall parts are perforated.

In this form they can be used, for example, for an outlet construction be used, which take the form of a continuous slot with spaced-apart slots downwards extending sidewalls instead of a series of outlet pipes.

Instead of the individual silencers 33 described in connection with FIGS. 1 and 2, elongated baffles can be used with a channel-shaped cross-section are used, which are either parallel to the longitudinal axis of the cabin cder run across it.

These baffles can include an inverted one, for example U-profile, the open side of which is opposite the outlet slots or pipes. This open side can be characterized by a lower wall perforated sheet metal material, as shown at 54 in Fig. or shown at 38 in Fig. 2,

M ii ^{i ::} :::::

OAKRXSH DKXSYS 7370/80

- 27 -

tuad der ttaum awl can see the upper and lower walls then be filled with the soundproofing material.

The underside of the silencer or baffle plate can be shaped in such a way that eie the least airflow Resistance offers "

Claims (1)

., - INQ. OUINnAU KUHLINu »» ·. ·.
-into the. CONRAD-JOACHIM KÖCHLING • "· » * » * wm m 1
chen: ' U [pl
• QIPI Fleyer Strasse 135, 5800 Hagen
Ri | f (O 23 3t) 811 B4
Τβ (θ () Γ8ΓΠΠ) Βΐ Pill BMHOCXI HftQ Γ | β £ ΘΠ
Accounts: Commerzbank AQ. Hagen
(BLZ 450X00 «) 3 515095
SpflrR & sse HeQon 100D | 2O4S
Postal check! There and 6980 ~ 4GD ^nÄ T? RTKR DRYßYf? LTTiTI ¹ RD - No 73.70 / 80 a British Company of
Carrier House,
M CUL nXL'Ai ΛΛΛΛ W
London, SWlE 5EL, Engla Ud. 10. Tnnii "T" 1980
U. from the Protection claims: 1. A paint spray booth consisting of a clad, a. Hardly surrounding the work area, a perforated work floor, a device for supplying air to the work area and for creating a flow of air from the work area down through the perforated floor, a device for flushing the sub-floor with a flushing liquid and one or more openings in the Underbody through which the washing liquid and the air can be drawn off, characterized in that a soundproofing device for lowering the noise level within the working area during operation of the cabin is attached under the perforated floor, which comprises the following ropes t sound-reflecting baffles (34, 50) and sound-absorbing material attached to at least one of its surfaces • Il. I Ii, ",
· 'I · H Il _{l> a} CARRIER DRYSXS, .7370 / 80. ·, '',.'Κ / · 2. A spray booth according to claim Λ , characterized in that the sound-reflecting baffle is a baffle plate (34) attached between the work floor and the sub-floor above the entrance to the opening or openings in the sub-floor, and the sound-absorbing material is a layer of acoustic material (36) which is held against the surfaces of the baffle plate (34) opposite the opening or openings. 3. A Parb spray booth according to claim 2, characterized in that that the baffle comprises a reverse channel-shaped part and the acoustic material in this channel is housed. 4. A paint spray booth according to claim 31, characterized in that that a number of these inversely channel-shaped parts at a distance from each other in an im essential horizontal plane is attached between the work floor and the sub-floor. 5. A paint spray booth according to claim 4, characterized in that each kanalföxmige part is tilted about its longitudinal axis in order to keep the resistance to the air flow from the working floor to the or the openings in the sub-floor low. I I «· · I« I « • t »I · III I ti I • i ill III! I I ··· te · ti · 6 A paint spray booth according to claim 2, characterized in that a row of outer openings arranged at certain intervals are provided in the underbody, and that the soundproofing device comprises several individual sound absorbers (33) , each above a corresponding outlet opening and the baffle plate encompasses the outer housing (34) of the or each silencer, this housing delimiting a hood open at its base, the cross-section of which tapers upwards , with the acoustic material (36) also being housed within this tree. 7 · A color fuel booth according to claim 6, characterized in that » draws «that this housing (34) has the shape of a cone or has a truncated cone 8. A paint spray booth according to claim 6, characterized in that that this housing (34) is pyramidal. 9 · A paint spray booth according to one of the understanding ones Claims, characterized in that the sound-absorbing material through a lower wall part (38) made of perforated sheet metal is held in its position on the sheet metal. CARRIER ORVflVfl 7320 / βΟ ί »- 10. A paint spray booth neeh in the test 2 to 9, dadurah that a liquid feed pipe (41) for puffing the outer surfaces of the baffle plates with cleaning fluid above the surface (3U) and underneath the surface (14) cheered en the top dee Gehlueee (3 <») opens« 11. A Ferbepritzkebine according to claim 1, characterized in that the edges of the opening or openings in the lower floor in an outlet construction with after Uland parts (46) directed downwards and that the Baffle device comprises a baffle plate (50) which a beatimtite from at least one of the parts of the island Distance and next to at least one of the wall parts runs, the sound-absorbing material (56) being accommodated in a space between at least this one wall part and the baffle plate and this at least one wall part with openings (55) for the Passage of the sound is provided. 12. A paint spray booth according to claim 11, characterized in that the lower bath with an opening in the form of a continuous slot is formed, the J 4 «I. > I. I 4 II
I. I 4
II -J- Longitudinal edges in a pair of wall sections going downwards end of perforated sheet metal, as well as in that a baffle plate is provided, which at a distance is attached by each wall part and runs parallel thereto in a substantially vertical plane from the underside of the sub-floor, the longitudinal channels between the wall parts and the Baffles are filled with the acoustic material " 13 * A dye spray booth according to claim 11, characterized in that that the sub-floor is formed with a plurality of spaced openings, each of which ends in an outlet structure with an outlet pipe (25) with downward walls (46) and that the Impact device comprises an outer jacket (49) which gives at least a portion of the wall surface of the tube, the acoustic material (56) then lying in the space j (53) between the pipe walls and the jacket. 14. A paint spray booth according to Claim 13, characterized in that that each outlet pipe and the jacket in question has a round cross-section and pipe and jacket are arranged coaxially. Il Il. «Ii ~~ Ί Colored apricot according to claim 13, characterized by that the outlet pipe has a rectangular cross-section and the jacket around all four sides of the Pipe mess goes around " 16. An IParbeprits booth according to one of the claims 11 to 14 | daditrch marked that this tree is limited is through one of the lower surface of the sub-floor formed upper wall and a lower extending between at least one wall part and the baffle plate Wall {51). _T 11 in 17 · Sine paint spray booth according to any of .Ansprüche to 16 "characterized in that the acoustic material is enveloped in a sheath (57) made of waterproof material. 18. A dye spray booth according to any one of claims 11 to 17, characterized in that each downward wall is formed from sheet metal (54) around the Openings (62) formed around it to prevent that through the relevant opening downwards flowing liquid passes through these openings. • · · I GAMBIER DBlSSß · ·? 570/80 · Replaced by sheet 19. An outlet construction for attachment in the underbody of a paint spray booth with a pair of oppositely lying, downwardly directed wall parts which delimit the sides of an opening in the underbody, characterized in that these wall parts (4-6) are formed from perforated sheet metal and a baffle plate ( 50) is spaced from each of these wall parts and runs in substantially the same direction to delimit a space (53) between the wall parts and the baffle; furthermore in that a sound-absorbing acoustic material (56) is accommodated in this room in order to attenuate the noises going through the openings (55) formed in this wall part. 20. An outlet structure according to claim 19 »thereby characterized in that this construction has a tube (25) and the PralMLech a jacket (49) surrounding the tube includes. . CONRAD KÖCHL> tfO FATS NTANWYER