CS251012B1 - Antiexplosive protection for powder coating compositions' spraying boothes - Google Patents

Abstract

The invention relates to an explosion protection device of a spraying chamber (1) for the application of powdered coating materials to protect against the explosion of industrial dust. The invention is essentially characterised in that a non-load-bearing balanced structural panel (2) is arranged in the rear wall of the spraying chamber (1). The size of the said panel is determined by the area necessary for the release of explosion products and for obtaining the pressure necessary for development. To prevent the transmission of flames to the operating chamber, the rear chamber is separated from the spraying chamber by a cover having suction apertures with a movable elastic plate, which acts as a self-closing flap in the event of an explosion. <IMAGE>

Description

The invention also relates to an explosion protection of a spray booth for the application of powder paints against the pressure effects of an explosion which arise during an explosion inside the booth and which may compromise the boiling of the booth.

So far it is used for the application of powder coating materials of two kinds of equipment. On one hand, it is a Klaeic device consisting of a spray booth with a powder separator connected by a pipeline, and it is an integrated spray booth having all functional elements grouped together. In conventional equipment ее occurs in a powder separator, where are located environmental filters and the risk of explosion of industrial dust. Therefore, explosion protection is provided for the separator itself and protection against explosion from the separator into the spray booth. In an integrated spray booth, where the filters are directly in the booth or form a separate, but structurally-connected, part of the booth, industrial dust explosion protection has not been addressed.

In the case of an explosion inside the integrated spray booth in the filter area, the first phase of the explosion is released within the entire booth, but there is also a high flame from the front of the booth into the booth operator area, resulting in a direct hazard to the operator.

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The aforementioned drawback removes the explosion protection according to the invention, which is based on the fact that in the rear side of the cab there is a relief panel and the rear proetor is separated from the spraying area of the cover with suction holes and movable foil.

The advantages of the present invention are that it is relieved against the suppressed effects of an explosion at the area in which the explosion reaction occurs. Explosion products are lightened · pannlea in the back ethane cabin released. The lightweight panel is preset to the desired opening pressure. By releasing the explosion immediately from the space »where it originates, eg from the filter space», the explosion transfer within the entire cabin is suppressed. Another advantage of the invention is the separation of the filter area from the spray area with movable blades acting as flaps. This completely prevents flame ejection from the front of the cabin to the operator area, thus avoiding direct danger to the operator. A further advantage of the invention is that the lightweight panel in the backside, releasing explosion products is explosive, for example, in the filter space at any time and thus the operator can control the filter space. Another advantage of the invention is that it does not melt and does not prolong the rapid change in hue of the powder coating applied over time.

In an exemplary embodiment, the protection of an integral enclosure for the space 3 separated from the spraying by the cover 10, where the powder coating compositions are applied, is schematically illustrated. Figure 1 is a sectional side view of the cab, Figure 2 is a sectional view of the cab »

In the rear wall of the cab 1 there is a lightweight 2 with an escape surface suitable for releasing the explosion product and necessary to achieve the desired opening pressure. During the operating mode of the cab, the lightweight panel 2 is held in the closed position in addition to the underpressure which in the rear proethor 3 of the filters 4 forms a suction hood of the cab - rear

- 3,251,012 are positioned each filter 4 is connected to the space ^£ spraying the suction opening 6 along these openings is fitted pohyyiivá foil 7, for example rubber. The foil 7 is movable over the working mode .1 cab again under pressure, which generates the in ^ r ^ i · space ⁴ £ filters exhaust fan shaped ^TA, and releases ^the entire area of suction holes 6. When the explosion in ^ r In the rear space 3 of the filters 4 and the exhaust chamber 8, the explosion products are released behind the cabin 1 by a lightened pannel 2, the movable foil 7 covering the entire surface of the suction openings 6 and thereby aiming to transfer the explosion from the rear space 3 of the filters. 4 to chamber 3 and the inclined bottom 12 must be «βηδ ± 10 mm, indicate n ^{g e} I ee measures for ^b ra ^ò U is" lying above ^of the flame from whom you zadz space into two space-operator.

Claims (2)

SUBJECT OF THE INVENTION Explosion protection of a spray booth for powder coating application against industrial dust explosion characterized by a lightweight panel (2) in the rear wall of the booth (1) and a rear compartment (3) separated from the spray compartment (5) by a cover (10) ee suction holes (6) and movable blades (7), 2, Against explosion protection of a spray booth for powder paint application according to the point of note (mm), wherein the width (11) between the cover (10) of the rear compartment (3) and the inclined bottom (12) is less than 10 mm.