DE2231584A1 - TRANSPORT SILO FOR POWDERED GOODS - Google Patents

Description

ψ- \ ~ ' ^χ ■' ■ '■';;'■'"{June 27, 1972

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TYCOATE INDUSTRIAL FINISHES LIMITED Gillibrands, England

"Transport silo for powdery goods ^M

The invention relates to the transport of powdery material. Powdery material has hitherto been transported in drums, in particular cardboard drums, and then from these drums into storage hoppers or the like to be used, for example, in electrostatic coating equipment. This The process is disadvantageous because of the loss of powdery material in connection with contamination of the plant and the

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Atmosphere can occur.

A transport silo according to the invention that eliminates these disadvantages for powdery goods comprises a container with an inlet for the powdery goods at one end »an outlet for the goods at the other end, detachable devices for closing the inlet and the outlet for transport, with a carrier holding the container during transport and with devices through which the flow of the powdery Good from the outlet is facilitated.

The invention also includes a method of delivering powdery material to an electrostatic coating device with a spray device, the electrostatically charged hurling powdery material into a stream of air, the method comprising connecting an inlet of the device to the Outlet for powdery material of the silo according to the invention, the switching on of the device facilitating the flow and the Establishing a connection between the outlet of the silo and the inlet of the device comprises.

Such a procedure reduces the possibility of occurrence of losses in powder form »

In a further development of the invention, the walls of the container are provided with thermal insulation, the container walls

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Are double-walled and one example of foamed Plastic existing heat-insulating intermediate layer.

The device facilitating the flow of powdery material comprises the powdery material arranged in the area of the outlet Well aerating devices that allow the powdery material through make one or more air streams flowable. According to a further feature of the invention, it comprises the stream Facilitating device, an annular chamber around the outlet that can be spliced with compressed air, the compressed air through openings flows in the wall of the annular chamber into the interior of the container.

Further features of the invention are explained in more detail with reference to the drawing, which shows an exemplary embodiment. In this Drawing show:

1 shows a section through a silo according to the invention and

Fig. 2 is a partial section through the outlet of the silo on a larger scale.

A transport silo for powdery material comprises a container 1o with an inner wall 12, an outer wall 14 and one Intermediate layer of heat-insulating material 16, the

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Container through upper and lower holder 18 and 2o on a viea? - footed carrier 22 is attached. At its upper end, the container 1o has an inlet 24 for powdery material and a tube 26, through which the air exits when the container is filled. Both the inlet 24 and the tube 26 are provided with releasable closure caps 28 and 3o.

At the lower end of the container 1o has an inlet 32 which is shown in Fig. 2 of the drawing on a larger scale.

In the embodiment shown in the drawing, a circular outlet opening 34 is surrounded by a collar 36, the threaded bores 38, which are used to receive threaded bolts, through which a locking washer, not shown, or preferably a conventional dispensing valve can be connected to the container 1o. The dispensing valve can, for example be a rotatable dispensing or shut-off wheel of the type having a generally cylindrical housing with radially extending Wings which, when revolving around the central axis of the housing, release predetermined amounts of powdery material from the outlet.

In order to aerate the powdery material in the area of the outlet 32 and thereby to facilitate flow through the outlet, an annular chamber 40 is formed above the collar 36.

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This annular chamber is supplied with compressed air through a pipe 42 and is in the area of the outlet 32 via two rows of openings 44 with the interior of the container in connection. A pressure regulator and meter are at 46 (Fig. 1) switched to line 42.

In another embodiment of the silo, an annular chamber is provided which corresponds to the chamber 40, but comprises a perforated inner wall over which a porous part is fastened, for example a porous membrane made of polyvinyl chloride. The arrangement of a porous membrane prevents powdery material from entering the annular chamber. Although the drawing shows a pipe running between walls 12 and 14 of the silo, it is possible to route the pipe essentially horizontally through the outer wall 14 directly into the annular chamber.

One application of the silo shown in the drawing is the supply of powdery material to an electrostatic one Coating device of the type as provided by Gema A.G. Apparatebau St. Gallen, Switzerland. That However, the silo can also be used to feed powdery material to a recovery system for powdery material as described in British Patent 1,198,129. The outlet 32 of a filled silo

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is connected to an inlet for powdery material and compressed air is introduced into the annular chamber 4o in order to make the powdery material flowable in the area of the outlet 32. The connection between the silo outlet and the device inlet is then opened, in preferred embodiments, by actuating the dispensing valve which is attached to the collar 36 of the silo outlet.

In this way it is possible to use powdered material in a device feed, the loss of powdery material practically is negligible.

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Claims (7)

Dr. A. M e η t ζ e I DipWng. W. Dahike DipWng. K-J. Lippert Sept. 20, 1972 Patentanwälte L./Li, 506ReFi ath near Cologne f Frankenforster Strasse 137 P 22 31! 584.0 TYOOATE IiOJUSTRIlI. PlIFISHES LIMITED claims 1. Transport silo for powdery material with a container which has an inlet and an outlet for the powdery material at opposite ends, and. with lids for closing the inlet and the outlet for the transport, characterized by a carrier (22) holding the container (10) for the transport and by a ^{device facilitating the H 1} IuB of the powdered material from the outlet (32). 2. Transport silo according to claim 1, characterized in that that the device for facilitating the flow of the powdery material from the outlet (32) a around the outlet (32) arranged annular chamber (40), a Compressed air line (42) and openings leading into this chamber (44) which connect the chamber (40) to the interior of the container (10). 209883/0705 ?? 31584 8 3. TransportsiIo according to claim 2, characterized through a porous membrane covering the openings (44). 2 O 9R R 3 / f170F Claims 1. Transport silo for powdery material with a container that has an inlet and an outlet at opposite ends for the powdery material, and mi ^ lids for Closing the inlet and outlet for transport, marked / u r c h a the carrier (22) holding the container (1o) for the transports and by a device facilitating the flow of the powdery material from the outlet (32). 2. transport silo according to / claim 1, characterized gekennzeichne {y that the container (1o) of double-walled (12, 14) is formed. 3. Transport silo according to claim 2, characterized \ x rch heat-insulating material (16) between the two walls (12, 14) of the container (io). 4. Transport silo according to claim 1 to 3 »thereby marked 'that the facility to facilitate of the flow of the powder-shaped material from the outlet (32) an annular chamber arranged around the outlet (32) (4o), a compressed air line (42) and openings (44) leading into this chamber, which connect the chamber (4o) with the 209883/0705. - 8th - ORIGINAL INSPECTED Connect inside the container (1o). 5. Transport silo according to claim 4, characterized by a porous membrane covering the openings (44). 6. Method of feeding powdery! Good to an electrostatic coating device with a spray device which hurls electrostatically charged powdery material into an air stream using a transport silo according to claims 1 to 5> characterized in that an inlet of the electrostatic coating device is coupled to the outlet (32) for powdery material of the silo that the flow of pulverulent material gen facilitating means (4o, 42) is turned on, and then the connection between the outlet (32) of the silo and the inlet is made of the coating device. 7. The method according to claim 6, characterized in that the connection between the silo outlet and the inlet of the coating device is established by actuating a delivery device connected to the silo outlet (32). 209883/0705 Blank.page