KR20180050283A - Painting Booth with Filter Change System - Google Patents

Abstract

The paint-spraying booth 10 comprises a paint-spraying chamber 11 in which the paint is sprayed inside the paint-spraying chamber 11 and the overspray is discharged to the paint- And the air flow is transmitted to at least one filter unit 16 of the booth for filtering and separating paint oversprays from the air flow. The filter unit includes a plurality of replaceable filter modules (17), each of which is removably received within a housing (18) in the filter unit. The track system 30 removes each filter module 17 of the plurality of filter modules between the housing 18 of the filter module and the zone 31 for entry / exit of the filter module from / Allow to transport.

Description

Painting Booth with Filter Change System

The present invention relates to a paint-spraying booth provided with a system for changing a filter for overspray removal.

Generally, an overflow, or air flow through the work area, is provided to the paint-spraying booth to deliver excess sprayed paint to the outside of the booth. The air sucked with overspray must be removed before the air can be released into the environment or reintroduced into the booth, and for this reason the air flow is made to pass through the appropriate filtering system.

Systems using filters must be clogged and regularly replaced as they are filled with paint. This often prevents the booth from operating for a significant period of time. In addition, filter change operations can be a complex and challenging task for maintenance personnel who are often forced to work in "contaminated" areas.

A general object of the present invention is to provide a booth having a filtering system with means for facilitating the replacement of the overspray removal filter.

In view of this object, the emerging idea according to the invention is to provide a paint-spraying booth, the paint-spraying booth comprising a paint-spraying chamber, in which paint Sprayed, the paint-spraying chamber is provided with an air flow for discharge of the overspray, the air flow being delivered to at least one filter unit of the booth for filtering and separation of the paint overspray from the air flow, The unit comprises a plurality of interchangeable filter modules, each filter module being removably received within a housing in a filter unit, the paint-spraying booth comprising a plurality of filter modules, Between the housing and the area for entry / exit of the filter module from / into the booth It is characterized in that it comprises the system.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the innovative principles of the present invention and the advantages of the present invention in comparison to the prior art, examples of embodiments that apply these principles will be described below with the aid of the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a partially sectioned schematic front view of a booth according to the invention.
Figure 2 shows a schematic plan view of a booth partitioned along line II-II of Figure 1;
Fig. 3 shows an enlarged partial schematic view of the booth according to Fig. 1 during a filter changing operation.
Fig. 4 shows a schematic view similar to that of Fig. 1 and showing possible variations of the embodiment of the booth according to the invention.

Referring to the drawings, FIG. 1 illustrates a paint-spraying booth according to the present invention, which is generally designated 10.

The booth includes a chamber 11 for a spraying object 12 (e.g., an automobile body). Advantageously, the object to be sprayed is conveyed into the chamber 11 by a known sequential conveyor system 13.

A known paint-spraying device (not shown) is provided in the chamber 11 which is operated to spray paint onto the surface of the object to be painted. Advantageously, the paint-spraying device can be realized in the form of a known robotic arm provided with a spray gun.

Air for evacuation of the overspray from the chamber 11 is circulated inside the booth. For example, a suitable air circulation fan (not shown) is advantageously provided in accordance with a per se known technique for creating a continuous flow of air through the chamber.

Advantageously, for circulation of the air flow, the floor 14 of the chamber 11 is constituted by a grill, through which the chamber air is drawn. Accordingly, a corresponding air inlet 15 is provided in the ceiling of the chamber so as to have a continuous air flow passing vertically through the chamber from the top downward during the paint-spraying operation. The air flow from the chamber 11 is transferred to at least one filter unit 16 which holds the overspray. Advantageously, the filter unit comprises a plurality of interchangeable filter modules (17), each of which comprises a sheet for the filter module and an inlet for air from the chamber and an inlet Lt; RTI ID = 0.0 > 18 < / RTI >

In particular, advantageously, a passage 21 for allowing air to enter the filter and an outlet 24 in each housing 18 are provided.

In the embodiment shown in Fig. 1, advantageously, there are a total of two filter units, and these two filter units are arranged to face each other in a mirror-image layout with respect to the vertical mid-plane of the booth. Advantageously, this plane is parallel to the direction of movement of the transportation system 13, which defines the direction of longitudinal extension of the booth.

In a booth embodiment in which air is sucked through the floor 14, it is preferred that the filter unit or unit 16 is arranged directly under the floor 14.

In the embodiment shown, there is advantageously a chamber 19 having a cross-section in the form of a generally T, the chamber 19 extending horizontally below the floor 14 to receive air from the floor 14 Defines a top header 20 and the vertical portion of T forms a passageway 21 that extends along the filter module to permit entry of air into the filter. Inside the passageway 21, the inlet 22 of the filter module, which is present in each housing 18 provided with a suitable opening 25, is arranged side by side. The outlet 23 of the filter module in each housing 18 in turn communicates with a chamber formed by the housing 18 and connected to the outlet 24 (preferably at the bottom of the housing).

In the illustrated embodiment, advantageously, the filter module has a parallelepiped shape and the inlet and outlet are arranged on opposite sides. The filter may be of various suitable types and may also be of a disposable type, for example of cardboard.

The outlet 24 of each housing 18 is connected to the duct 27 for discharge of air from the booth (preferably via one or more additional filters 26 of the "pocket" type, for example) do. The duct 27 can reliably discharge air from the outside and / or can transfer the air back into the chamber 11 for recycling of the purified air.

Again, advantageously, a controlled gate 28 is provided in the outlet 24 of the housing for throttling and / or closing the air flow exiting the filter module.

In Figure 1, the air flow into the booth is schematically indicated by arrows. Air from the bottom of the chamber 11 passes into the passageway 21 and is then introduced into all of the filter modules in parallel. After passing through the respective modules, the air enters the housing 18 (advantageously in the form of a box-shaped cabinet, respectively) and exits the outlet 24 to reach the outlet duct 27.

2, the booth according to the present invention allows each filter module 17 of a plurality of filter modules 17 to be coupled to the housing 18 of the filter module 17 and / And a zone 31 for entry / exit of the filter module from within.

Advantageously, the rail system is of the aerial type and comprises an extractable frame 50 that slides on a guide 51 (preferably of the aerial type) for each housing 18. In turn, the extractable frame includes a first pair 52 of rail sections 52 and a second pair 53 of rail sections. Both of the pair extend horizontally and horizontally with respect to the direction of extraction of the frame on the guide 51.

The first pair 52 is intended to be received within the housing 18 and supports the carriage 54 on which the filter module 17 is suspended. Instead, the second pair is held outside the housing.

2, the pair of rail sections of the same frame 50 are arranged such that, when the frame 50 is engaged or in an operative position (e.g., below the lower side in Fig. 2) The second pair of sections 53 are oriented toward the loading / unloading section 31, while the pair 52 is inserted inside the corresponding housing 18 to bring the corresponding filter module 17 to the operating position Are spaced apart from one another so that they are aligned with the stationary section 55 to provide a complete outer rail track (with the pair of sections of the other booth frame 50).

Similarly, when a frame is extracted (e.g., as seen in the upper right hand side of FIG. 2), the first pair of sections 52 may include a complete outer rail track (not shown) oriented toward the entry / (With the pair of sections of another booth frame 50).

In this way, alternatively, the first and second pairs of rail sections of the extractable frame form a rail track section for movement of the filter module between the corresponding extractable frame and the entry / exit zone.

For the extraction of the frame, each housing also includes an associated door 56 that becomes hermetic when closed. The door 56 may be a door hinged to each housing, as shown at the top of Figure 2, or it may also be a hinged door, as shown at the top of Figure 2, (Shown in dashed lines in Fig. 2) mounted between pairs of rails to move with the frame between the extracted positions.

The side for entry of air into the housing 18 (i.e., the inlet opening 25 of the housing) is also provided with means for closing an opening for entry of air into the filter module. Advantageously, these means comprise means for moving along the passageway (advantageously by means known per se and not shown thereby, such as a chain drive (not shown) for moving between the rest position and the operating position A movable partition 37 (which is powered by the system), and at each operating position, the movable partition 37 closes one of the openings for entry into the filter module. In this way, when it is desired to replace the filter module, the partition is displaced to close the air inlet into the module, after which the module places the frame 50 outwardly on the guide 51 of the frame 50 And extracted from the housing by sliding. Advantageously, the outlet 24 for air from the housing is also closed by a gate 28. In this way, the housing to be replaced can be completely isolated from the air flow of the booth, and the operation of the booth is not hindered.

If the extracted module has a rail section 52 of the extracted module that is aligned with the fixed section 55 the filter module can be slid along the rail to the area 31 using the carriage 54 of the filter module And, in zone 31, the filter module can be removed for cleaning or disposal, if desired.

A new module can then be inserted on the rails and transported to the empty housing for extraction into the housing in the reverse procedure of the procedure described above for extraction.

The module may be moved from the entry / exit area 31 to the entry / exit area 31, for example, by a known elevator or conveyor (not shown) suitable for picking up the module from the store. Advantageously, in the case of a compatibility filter made of, for example, a cardboard, the entry / exit area may also comprise a suitable compacting device of the type known per se for the module used.

The filter module has an inlet side to which the edge of the filter module is sealingly bonded to the peripheral edge 36 of the communication opening 25 between the housing 18 and the entry passageway 21. In this way, the filter is placed against the edge 36 sufficiently to ensure airtightness and circulation through the filter of the air flow from the paint-spraying chamber. Sealed contact can be ensured by, for example, the propulsive force exerted on the module by the door or frame in the closed or operating position, or by additional known locking means that can be provided and operated to keep the module in the operating position .

3 shows in greater detail a segmented front view of the operation for extraction and modification of the filter module 17 by the operator.

Although embodiments with two filter units in a mirror-image arrangement have been found to be particularly advantageous, it is nevertheless possible, nevertheless, to use a single filter unit, for example, where the air flow to be treated is more limited. This is illustrated in FIG. 4, for example, where the chamber, essentially T-shaped for delivering air to the filter, has a filter module on only one side of the entry passageway and is thus provided with a single filter transfer and transfer system. The rest of the structure of the paint-spraying booth can be the same as described above.

At this point, it is clear how the predefined purpose was achieved. With the booth according to the invention it is possible to replace the filter periodically, easily and quickly, without even stopping the plant. Because the air flow is divided by the plurality of filters, the closure of one filter for removal and replacement of one filter does not excessively reduce the air flow during the time required for the overall operation. Due to the rail system, the operator is able to perform the change operation easier and with less effort.

However, mobile systems are simple, robust and relatively low-cost.

Naturally, the above description of embodiments applying innovative principles of the present invention is provided as an example of these innovative principles, and therefore should not be construed as limiting the scope of rights claimed herein.

For example, as can now readily be appreciated by those skilled in the art, the entry / exit zone can be divided into an entry zone through which the new filter arrives and a departure zone through which the used filter is transferred. These zones may be, for example, at two opposite ends of a moving track formed by sections 52 or 53 and 55. [

The mobile system may also be automatic or semi-automatic. For example, it may be advantageous to design the frame 50 to be harnessed for controlled movement of the frame 50 between engaged or extracted positions.

The change of the filter may be performed periodically at a programmed time after a given operating period, or a suitable sensor may also be provided, and the sensor may, if a filter clogged by more than a certain amount is detected, Request a change to the filter. During the entire change operation, the filter modules can also be sequentially replaced one at a time (also in pairs in the case of two filter units with associated independent automated systems) until all the filter modules are completely replaced . Accordingly, the paint-spraying booth can be kept operating for the entire time period required for replacement.

In the case of a disposable filter made of a flammable material, a method for high temperature incineration of the used filter can be expected and the method at least partially uses the filter itself as a fuel and the paint contained in the filter. In addition to removing the filter, it is possible to advantageously use combustion for heat recovery from combustion fumes.

Claims (10)

A paint-spraying booth (10)
A paint-spraying chamber (11)
Wherein the paint is sprayed in the paint-spraying chamber (11) and an air flow is provided for discharging the overspray to the paint-spraying chamber (11) Is delivered to at least one filter unit (16) of the booth for filtering and separation of the spray, the filter unit comprising a plurality of replaceable filter modules (17), each filter module comprising a housing 18, < / RTI >
The paint-spraying booth is configured such that each filter module (17) of the plurality of filter modules (17) is connected to a housing (18) of the filter module (17) And a rail system (30) for removal and transport between areas (31) for entry / exit. The method according to claim 1,
The rail system (30) includes, for each housing (18), an extractable frame (50) movable between an engaged position and an extracted position engaged within the housing; A first pair of rail sections 52 intended to be received within the housing when the extractable frame is in the operative position, Wherein the paint-spraying booth is provided in a frame. 3. The method of claim 2,
The rail system (30) includes a second pair (53) of rail sections spaced from a first pair of rail sections (52) in the direction of extraction of the frame, the first pair and the second pair Wherein the first pair extends horizontally and horizontally with respect to the direction of extraction of the frame and the second pair is intended to be retained outside the housing when the extractable frame is in the operating position, Wherein the first and second pairs of sections form portions of the track for movement of the filter module between the corresponding extractable frame and the entry / exit zone. The method according to claim 1,
Each housing has a first inlet (25) for air to arrive from the paint-spraying chamber and, when the filter module is in an operating position inside the housing, a corresponding inlet (22) Characterized in that a control means (37) is provided for closing the first inlet (25) when the filter module is extracted from the housing, Ying Booth. 5. The method of claim 4,
Wherein the controlled means comprises a movable partition (37) that slides to move between a rest position and an operative position, wherein, in each of the operative positions, the movable partition (37) And closing the inlet (25). 5. The method of claim 4,
Each housing has an outlet (24) for the air after air has passed into the filter module inside the housing and is provided with gates (28) controlled to controllably close the outlet Paint-spraying booth. 5. The method of claim 4,
Wherein the first inlets (25) of the housings are provided in a common passage (21) through which air from the paint-spraying chamber reaches. The method according to claim 1,
Wherein the filter units are two in total and arranged in a mirror-image layout below the floor of the paint-spraying chamber. The method according to claim 1,
A chamber (19) with a T-shaped cross section is provided below the floor of the paint-spraying chamber, and the horizontal portion of the T is provided with ducts for delivering airflow through the floor of the paint- 20, wherein the vertical portion of the T forms a duct (21) in which the inlets (22) of the filter modules (17) are formed. The method according to claim 1,
Characterized in that additional filters (26) are present downstream of said filter modules (17).

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