close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2132826

код для вставки
Oct. 11, 1938.
J_ E_ LUDWlG
2,132,826
SPRAY BOOTH
Filed April 15, 1956
INVENTOR.
L/UHN E. LUDWIE'
BY
ATTORNEY7
2,132,826
Patented 0a. 11, 1938, _"
UNITED STATES PATENT OFFICE
’
2,132,826
SPRAY BOOTH
John E. Ludwig, Detroit, Mich., assignor to New
comb
corporation
DavidofCompany,
MichiganInc., Detroit, Mich., a
Application April 13, 1936, Serial No. 74,228
9 Claims. (CI. 91-60)
My inyention pertains to a paint spraying lustrate the construction of such a booth in
accordance with my invention;
booth for, installation in buildings where auto
Fig. 2 is a side elevational view thereof partly
mobile
‘es, furniture and other articles are
sprayed with paint, varnish and the like.
It is an object of my invention to provide a
paint spraying booth comprising an improved
ventilating system whereby the ventilating air is
admitted into the booth and directed there
through in such a manner that a smooth flow of
10 air is provided whereby eddys are eliminated and
the poisonous paint infected air is carried stead
ily away from the attendant who is doing the
spraying and the spray is properly carried to
and around the object to be sprayed for depos
iting a suitable layer of paint or varnish thereon.
Another object of my invention is to provide
a paint reclaiming spraying booth comprising
means for exhausting air from the booth and
efficiently depositing and preserving the waste
20 paint spray until it can be salvaged while pre
venting the paint spray depositing and hard
ening on adjacent baffle surfaces from which
it could not be efficiently salvaged.
It is also an object of my invention to provide
a semi-closed ventilated paint reclaiming spray
booth especially suitable for installation in a
factory room for receiving articles to be sprayed
therethrough and having an exhaust air out
let adjacent the floor at one side of the booth,
80 a main air inlet entering through the roof at
the opposite side of the booth through an inlet
provided with a baiile de?ecting plate for di
recting the inflowing air away from the oper
ator and toward and around the sprayed article
35 and, toward the exhaust outlet and also com
prising a high velocity air inlet projector for
projecting a sheet of air downwardly adjacent
the oppositeside of the article being sprayed and
toward the air exhaust outlet adjacent the
bottom of the housing.
It is a further object of my invention to pro
vide an improved method of operating a semi
closed spraying booth in a factory room.
The invention itself, however, both as to its‘
45 construction and its method ‘of operation, to
gether with additional objects and advantages
thereof will best be understood from the follow
ing description of a speci?c embodiment, when
read in conjunction with the accompanying
50
drawing, where like reference characters refer
to similar parts throughout, and in which:
Fig. 1 is a side elevational view of a ventilated
paint reclaiming‘ spraying booth with portions
55 broken away and sectioned to more clearly i1
in section on the line 2-2 as shown in Fig. 1;
and
Fig. 3 is a fragmentary sectional view illus
trating a detail thereof.
6
Referring more particularly to Fig. 1 of the
drawing, my invention comprises a spraying
booth inclosed by a front wall I and a rear wall 10
3 and joined overhead by a roof 5. The ends of
the booth are partially closed by end wall pox‘.
tions ‘I and 9 which are spaced apart su?lciently
to provide a doorway ll therebetween through
which the automobile bodies or other articles
to be sprayed may be transported in any suit
able manner as on an endless conveyor (not,
shown). The front wall I of the booth is pro
vided with a doorway l3 through which the at
tendant may enter and adjacent which he
stands while spraying the objects which are
transported between doorways H in the ends of
the booth. The doorway l3 in the front wall
also aids in ventilating the booth.
For ventilating the booth and exhausting paint 25
laden air therefrom, I provide a cupola l5 which
is mounted above the roof 5 and comprises
sloping gable portions i'l'which rise above the
roof 5 of the booth and which may be integral
therewith or secured thereto in any suitable
manner. The portion of the roof 5 upon which
the cupola i5 is mounted is suitably apertured
to permit the free circulation of air there
through from the booth into the cupola and
an exhaust conduit i9 is connected from a cir 35
cular port 2i in the apex of the cupola. The ex
haust conduit i9 is connected to the inlet of
an exhaust fan 23 which is operated by a suit
able electric motor 25. From the outlet of the
exhaust fan, a conduit 21 is connected for trans- 40
mitting the exhausted air from the building in
which the booth is installed.
For guiding the ?ow of air from the booth
and reclaiming the ?nely divided paint and spray
which is carried by the air, conduit means is 45
provided within the booth for connecting from
the cupola to a point adjacent the lower por
tion of the booth. This connection is established
through interconnecting conductive means com
prising a. verticle plate 29 connecting down- 50
wardly from the roof of the booth directing
under the front edge of the cupola, and enclos
ing a space between the plate 29, the end walls
and the rear wall 3 of the booth. In this en
closed space, I provide a water eliminator which 55
8,189,886
comprises a plurality of spaced plates 3i which voir through the spray nozzles 41 instead of
comprise reversely bent portions which, as shown taking water from an external source and con
more clearly in Fig. 2, are spaced for passing tinuously draining water from the reservoir and
the exhaust air therebetween. From the lower‘ thus wasting a portion of the reclaimed material.
edge of the plate 29, I-pivotally support a water For this purpose, I provide a suitable motor
de?ecting plate 33 on a horizontal pivot bar 34 operated pump 49 which draws the water from
supported between the end walls of the booth.\ the reservoir through its inlet conduit II and
In normal operation, the plate 33 ls held by the \ forces it out through its discharge.conduit 33
exhaust suction in its closed position as shown.
under suitable pressure into the nozzle 41 in
10 However, a lever 35 is pivotally mounted on a
pin 31 on the end wall of the booth whereby
the position of the pivoted water de?ecting plate
33 may be adjustably controlled as desired by
turning the lever to the position indicated by
the dotted lines 33.
Mounted upon the rear wall 3 of the booth,
I provide four air flow conducting conduits 39,
the upper ends of which are adapted to be oper
atively engaged and conductively connected to
20 the exhaust cupola when the pivoted plate 33
is drawn toward the rear wall 3 of the booth
in adjacent abutting relation, as shown.
The
air in the booth is then drawn from the booth
into the lower ends of the vertical conduits 39,
25 as indicated by the dotted arrows. To provide a
closely con?ned air flow through the four vertical tubes 39, I provide a front baiile plate 4|
which is secured across the booth adjacent the
front sides of the four vertical conduits 39 in
30 any suitable manner. The lower edge. of the
baille pTate 4| is curled gently toward the rear
of the spray booth to provide for smoothly guid
ing the air under the ends of the vertical con
duits. A bottom plate 43 connects between the
35 lower ends of the conduits 39 and extends across
the booth adjace the front sides of the lower
ends of the condui s where it also connects with
the lower edge of the baffle plate 4| which is thus
supported in a slightly inclined position. The
bottom plate 43 also extends around and be
tween each of the conduits 39 to restrict the air
?ow therebetween.
For reclaiming the larger particles of the paint
and varnish carried downwardly in the booth by
the spray, I provide a water reservoir 45 on the
-?oor in the booth adjacent its rear wall 3. As
the air is drawn under the curled lower edge of
the plate 4|, it passes adjacent the upper sur
face of the water in the reservoir and thence
turns upwardly into the conduits 39 and cen
trifugal force causes the larger particles in the
air to be deposited in the water. The deposited
paint or varnish material settles in the water
which retains it and preserves it in a convenient
55 condition for reclamation. The reclaimed ma
terial is thus prevented from lodging and drying
hard and it may be conveniently salvaged as
by shoveling from the bottom of the reservoir.
In order to emciently recover the more ?nely
60 divided particles of the paint and varnish which
passes over the water reservoir and upwardly
into the vertical conduits 39, I provide each con
duit with a double opposed spray nozzle 41 which
projects two cones of evenly divided water spray
65 upwardly and downwardly in each conduit. The
ascending air in the exhaust conduits 39 is com
pletely deluged by the water sprays projecting
into each conduit in the form of two opposed
cones, and the finely divided particles
paint
70 and varnish are removed and carried do ward
ly into the water reservoir where it is properly
preserved and may be conveniently removed
later.
For more effectively reclaiming the material,
75 I preferably recirculate the water from the reser
thevertical exhaust conduits.
10
In order to effectively ventilate the spray booth
adjacent the attendant for carrying the ?nely
divided spray away from him and to avoid eddys
in the air flow which would tend to carry the
poisonous fumes back to the attendant and also 15
to aid the attendant in properly applying a
smooth coat of paint or varnish upon the ob
ject, I provide means for supplying a prede
termined quantity of intake air to the booth
under forced circulation. The greater volume 20
of this air is admitted to the booth from an inlet
housing 31 which is mounted upon the front por
tion of the roof 3 of the booth. The lower por
tion of the inlet housing 51 is opened for direct
ing air into the booth and it is provided at its
front edge with a large baffle plate 59 which ex
tends across the booth and is inclined down
wardly for directing the greater volume of air
toward and over the object to be sprayed and,
toward the exhaust outlet. The intake air is 30
supplied to the inlet housing through a conduit
6| connecting from a large air inlet conduit 33
which connects from a pressure intake fan 63
which may be operated by a suitable electric
motor, as will be readily understood.
From the large inlet conduit 63 a portion of
the inlet air is divided oil’ through a small pipe
61 which connects into a small inlet housing 99
mounted on the central portion of the roof I
of the booth. From the small inlet housing 89 on
the roof of the booth, a high velocity air inlet
projector extends downwardly into the booth
comprising a pair of spaced air de?ector plates
1| and 13 projecting downwardly into the booth
and inclining toward the rear wall thereof. The
air projector plates ‘II and 13 extend across the
spray booth between the end walls 9 and define
a narrow air projecting slotv for projecting a
narrow sharply de?ned stream or sheet of air 13
downwardly adjacent the rear side of the object
being sprayed and toward the water reservoir as
indicated by the small arrows.
Opening from the air inlet conduit 9|, I pro
vide a factory by-pass nozzle 11 which may have
an air ?ow controlling damper 19 therein for
projecting a portion of the in-take air directly 56
into the factory room where the spray booth is
installed. The air inlet conducting conduits and
the high velocity projector and the factory re
turn nozzle are so constructed and adjusted that
with the pressure in-take fan and the exhaust
fan adjusted for handling equal volumes of air,
one-fifth of the inlet air passes out through the
factory by-pass nozzle and the other four-fifths is
divided between the inlet conduits 3| and 31 connecting into the booth. For example, the ex
haust fan is preferably set to handle ten thousand
cubic feet of air per minute, the inlet fan is set
for delivering the same volume, and the damper
control nozzle which discharges into the factory
is adjusted to discharge approximately two 70
thousand cubic feet per minute. Thus while the
exhaust fan will be pulling out ten thousand
cubic feet per minute, only eight thousand cubic
feet per minute‘will be supplied by the down 75
2,188,896
wardly directed currents of air directed into
the booth through the inlet conduits 3| and“,
and the additional two thousand cubic feet of
air per minute must be taken from the factory
room.
In operation, the air ?ows smoothly down and
around the object to be sprayed as indicated by
the dotted arrows, thus eliminating eddies, car
rying the poisonous spray steadily away from
10 the attendant and aiding him in properly sup
plying a smooth coat to the object being sprayed.
As the air passes downwardly toward the water
reservoir 45 on the ?oor, gravity aids the air ?ow
in carrying the particles of spray toward the sur
15 face of the water. As the air passes under the low
er curved edge of the de?ector plate 4| centrifu
gal force causes the larger particles of the paint
to be thrown into the water. As the air passes
upwardly into the vertical exhaust conduits 39,
20 it is thoroughly washed by the double cones of
water sprayed into the conduits by the double op
posed nozzles 41 therein. Since all the exhaust
air must pass upwardly through the conduits, all
the ?nely divided paint and varnish is effectively
25 reclaimed and washed down into the water res
ervoir where it is preserved until it can be con
veniently reclaimed as by shoveling it off of the
bottom of the reservoir._ As the air continues
upwardly, it passes between the water eliminator
30 plates 3| where the water is effectively deposited
and the exhaust air which passes out through the
exhaust conduits l9 and 21 does not carry an
excessive amount of water away from_the ap
paratus.
35
The water deposited in the eliminator 3| drips
down upon the inclined water de?ecting plate 33
where it ?ows downwardly upon the front surface
of the plate 4| and runs off of the longer edge of
this plate into the reservoir. This arrangement
40 provides a smooth evenly distributed sheet of
water ?owing down the front face of the baf
?e plate 4| and thereby prevents the spray of
paint and varnish lodging thereon where it would
harden and be very difficult to remove.
When the operation of the apparatus is dis
continued and the exhaust fan“ 23 is stopped,
the baffle plate 33 swings freely forward and
affords free access for convenient inspection of
55
60
65
70
75
exhaust air circulating means, conduits means
for conducting an therefrom and including
means for de?ning an exhaust outlet for draw
ing ‘air from the booth adjacent the bottom of
the rear wall therein, inlet air circulating means,‘
an air inlet in the front portion of said roof,
conduit means connecting therefrom for trans
mitting a large portion of the inlet air through
said air inlet, a transverse ba?le plate under said
air inlet in said booth and inclined downwardly to 10
ward said exhaust outlet for de?ecting the air
toward‘ and around the object being sprayed and
toward ‘said exhaust outlet, a second air inlet
mounted on a central portion of said roof, a high
velocity air-projector for projecting a narrow 16
stream of air across said booth downwardly ad
jacent the rear side of the sprayed object to
ward said exhaust outlet.
2. A ventilated paint reclaiming spray booth
having in combination a spray room inclosed by 20
a roof, side walls and end walls, exhaust con
duit means providing an exhaust outlet in the’
lower portion of said booth, water spray means
in said exhaust conduit means for washing the
air as it is drawn upwardly through said con 25
duit means, a water reservoir disposed under
said exhaust outlet, a ba?le plate disposed ad
jacent said exhaust conduit means, a water
eliminator mounted above the upper end of said
exhaust conduit means, an inclined water de 30
?ecting plate'under said water eliminator for
guiding a ?ow of water to the inwardly directed
surface of said baffle plate, exhaust air circulating
means, and conduit means connecting said air
circulating means to draw air upwardly from 35
said booth through said water spray and water
eliminator.
3. A ventilated paint reclaiming spray booth
having in combination a spray room inclosed by
a roof, side walls and end walls, open portions
in said walls, exhaust conduit means for exhaust
ing air from said booth comprising water wash
ing means, a water eliminator disposed there
above, a water de?ecting plate disposed under
said water eliminator for guiding the deposited
water over exposed surfaces adjacent said air
washing'means to carry the paint spray down
wardly and prevent a permanent deposit #hereof
and a water reservoir disposed under aid ‘air
washing means to catch the water 'eturning
It will be seen that I have provided an efficient. therefrom and to receive and preserve the re
ventilated paint reclaiming spray booth in which claimed spray material in suitable condition for
the paint or varnish is ef?ciently reclaimed and salvaging.
4. A ventilated paint reclaiming spray booth
the booth is e?ectively ventilated by air par
tially drawn from the room where. it is installed having in combination a spray room inclosed by 55
for providing a smooth ?ow of ventilating air a roof, side walls and end walls, open portions
in the booth which is free from eddys tending in said walls, conduit means for exhausting air
to drive the fumes back toward the attendant. from said booth comprising water washing means
Aside from the speci?c embodiment of the in- ‘ and a water eliminator disposed thereabove, a
water de?ecting plate disposed under said water 60
vention herein shown and described, it will be
for guiding a ?ow of water to pass
understood that details of the construction may eliminator
adjacent said air washing means to carry the
be altered or omitted without departing from the paint spray downwardly and prevent a perma
spirit and scope of the invention as disclosed and
nent deposit thereof, a water reservoir disposed
claimed and that I do not desire to limit my in-, under said air washing means to catch the water
vention to the exact constructions herein set returning therefrom and from said water elim
forth.
inator, an in-take air circulating device and con
In the claims, the words “paint laden" are to duit
means for conducting air therefrom to
be understood as qualifying the air that has not spaced points in said booth and air de?ecting
had the larger particles of paint removed there
means for projecting the air from said inlet con
from.
W
duits downwardly in said booth toward said water
I claim:
reservoir.
1. In a ventilated spraying booth the com
5. A ventilated paint reclaiming spray booth
bination of a spray room having ‘a roof, a front
having in combination a spray room inclosed by
wall, a rear wall and partially closed end walls
for passing articles continuously therethrough, a roof, side walls and end walls, open portions 75
the condition of the lower portions of the elim
50
3
inator plates.
'
4
in said walls, conduit means for exhausting air
exhaust air circulating means, conduit means
connecting said exhaust air circulating means
and a water eliminator disposed thereabove, a for drawing air from said booth and de?ning an
water de?ecting plate disposed under said water ' exhaust outlet near the bottom therein, said
eliminator for guiding la ?ow of water to pass exhaust conduit means including air washing
adjacent said air washing means ‘to carry the means disposed therein, a water eliminator dis
paint spray downwardly and prevent a perma
posed thereabove, a hinged water de?ecting plate
nent deposit thereof, -a water reservoir disposed connected between the upper end of said air
undersaidairwashingmeanstocatchthe
10 water returning therefrom and from said water washing means and said water eliminator where
fromsaidbooth comprisingwaterwashingmeans
eliminator, an in-take air circulating device, air
inlet conduit means for conducting a large por
tion of the in-take air into said booth adjacent
the front wall thereof, a baille plate for direct
15 ing the volume of said air toward said water
reservoir, a small conduit branching from said
inlet conduit and connecting to a middle portion
of said booth and high velocity air projecting
means associated therewith for projecting a nar
20 row sheet of air downwardly across said booth
toward said water reservoir.
6. A ventilated paint reclaiming spray booth
having in combination a spray room inclosed
by a roof, side walls and end walls, exhaust
25 conduit means providing an exhaust outlet in
the lower portion of said booth, water spray
means in said exhaust conduit means for wash
ing the air as it is drawn upwardly there
through, a water reservoir disposed under said
30 exhaust outlet, a water eliminator mounted above
the upper end of said conduit means, an in
clined water de?ecting plate under said elimi
nator, for guiding a ?ow of water upon in
wardly directed surfaces, exhaust air circulat
35 ing means, conduit means connecting said air
circulating means to draw air from said booth
upwardly through said water spray and water
eliminator, open portions in the side walls of
said booth, ‘an in-take air circulating device,
conduit means for conducting air from said
vice into said air spray booth, and a factory
pass nozzle for by-passing a portion of
in-take air to the factory room in which
de
by
by the water returned by the eliminator is con 10
ducted down adjacent surfaces when the suction
produced by said exhaust air circulating means
is su?lcient to draw the hinged water de?ecting
plate upwardly, and the eliminator plates are
automatically opened for inspection when the 15
exhaust suction is reduced.
8. A ventilated paint reclaiming spray booth
having in combination a spray room inclosed by
a roof, side walls and end walls, exhaust air cir
culating means, a water eliminator in said booth
adjacent the rear wall thereof, air washing
means disposed under said water eliminator, a
water reservoir disposed under said air washing
means and a hinged plate disposed between said
water eliminator and said water washing conduit
means to provide an air conductive connection
therebetween when an exhaust suction is applied
su?lcient to draw‘ the plate upwardly and where
by the plate opens automatically and provides
for convenient inspection of said eliminator when
the exhaust suction is reduced.
"
9. A paint reclaiming spray booth having in
combination an exhaust conduit opening to the
lower portion of the booth, a water spray in said
conduit for washing the air as it is drawn up
wardly through said conduit, asurface exposed
to the paint spray, located above said conduit
opening and between said conduit and the source ‘
of said paint spray, a ?lm of water covering and
?owing downwardly on said surface and a water
reservoir disposed under said opening and ex
the
the _ tending beneath said surface to catch the water
as it ?ows from said surface as well as the,
booth is installed.
water returning from the water spray means
7. A ventilated paint reclaiming spray booth and
15
to receive and preserve the reclaimed spray
having in combination a spray room inclosed by material
in suitable condition for salvaging.
a roof, side walls and end walls, open portions in
said walls for receiving articles to be sprayed,
JOHN E. LUDWIG.
Документ
Категория
Без категории
Просмотров
0
Размер файла
670 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа