FR2471335A1 - DEVICE FOR FLOWING A TANK FOR PULVERULENT OR GRANULAR BULK MERCHANDISE - Google Patents

Abstract

THE INVENTION RELATES TO A DEVICE FOR DRAINING A TANK FOR PULVERULENT OR GRANULAR BULK GOODS. IT IS CHARACTERIZED IN THAT IT CONTAINS, FOR FIXING ON THE UPPER EDGE 3, A REPLACABLE PART 4 PRESENTING A POROUS DRAIN SURFACE 8 REINFORCED ANNULARLY AND MAINTAINED BETWEEN A TANK FLANGE 2 SURFACE AND A COUNTERFLANGE SURFACE 5 OF THE DISCHARGE PIPE 1. THE INVENTION APPLIES TO THE HANDLING OF GOODS.

Description

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  The present invention relates to a device for flowing a powdery or granular bulk cargo tank having a flow pipe which tapers conically towards the body. down on the narrow section of a joining pipe for a discharge pipe, wherein at least the funnel-shaped internal flow surface is composed of a thin sheet of porous material, can be compressed to increase the fluidity and slip ability of the bulk goods under the effect of compressed air, and is fixed, at least on the upper circumference of the funnel, under the

form of a replaceable part.

  In such a flow device, described in German Patent No. 1.903.030, the replaceable part forming the flow surface is reinforced by support rails and is thus screwed several times into the flow pipe, and it is supported by ribs to form a belt channel. Replacement of the part is therefore very expensive and therefore takes a long time, but it is often absolutely necessary in the case of the transport of various materials sensitive to soiling. In particular, the liquid that enters the belt channel during the removal of the porous piece can also be removed with difficulty. According to the German patent application published under No. 2,249,783, it is known to provide tank angles allowing complete emptying with cushions or airbags, of coated or uncoated plastic sheet. The installation of these bags and in particular the replacement for cleaning purposes is complicated, and a total emptying in the corner area is not always guaranteed. The object of the present invention is to improve a flow device according to the technique already known, so that the interchangeable part consisting of a sheet of porous material can be replaced with a

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  minimum time loss and quickly, and that a complete control of the flow of residues is possible in a simple way. In order to achieve this objective, it is provided according to the invention that for attachment to the upper edge, the replaceable part having the porous flow surface is reinforced and is held between a flange surface of the reservoir and a counter surface. -fluid of the drain pipe. Thanks to this particularly simple attachment, the replaceable part can be lifted from the wall of the drain pipe together with the funnel-shaped drain pipe itself, when the drain pipe is dismantled in order to control, without further manipulation, and the part can be easily replaced or checked

  for the presence of possible residues.

  Particularly advantageously, the replaceable part held on its outer upper edge has a double-wall construction, the upper wall being porous and the lower wall being airtight and resting on the flow pipe. funnel shape, the lower common edge which forms an outlet for the goods to be transported hermetically connecting the upper wall and the lower wall. As no other fasteners are needed here, the part can be replaced with minimum assembly costs and can also easily be lifted from the wall of the drain pipe for perfect control of

possible residues.

  To avoid a large swelling of the interchangeable part under the effect of pressurized air, the upper wall and the lower wall are firmly connected to each other by substantially radial joints, a zone without joints is provided between the outer upper edge and the lower inner edge and the space between the two walls can be supplied with pressurized air, when necessary to increase the fluidity of the bulk goods. The drain pipe can then be used either without the use of pressurized air, or, depending on whether a simple removal of the replaceable part is possible.

possible, without replaceable parts.

  Particularly good strength can also be obtained when water hammers occur in the pressurized air line, for the interchangeable part, by making the joints starting from the outer edge directed towards the inner edge with a interruption, and between these joints intermediate seals respectively going di! outer edge substantially into the middle zone are provided. At the same time, a regular supply of pressurized air to the surface of the drain pipe is made possible. For a simple connection of the compressed air supply, the bottom wall of the interchangeable part is pushed from a screw connection into a hole, and the edges of this hole are held tightly between coupling flanges. the screw connection can at the same time be easily removably attached to the pipe wall

  flow that rises through it.

  In another embodiment of the invention, allowing less expense of material, the lower inner edge of the replaceable part can be reinforced by a circular cross-section ring and be held by a threaded ring, the inner straight section free from the threaded ring thus being in direct connection with the connecting pipe. For simple assembly and disassembly, the threaded ring may have nuts for a cartridge with

star-shaped screw.

  In order to increase the stability of the interchangeable part, particularly advantageously, a support structure adapted to the shape of the flow pipe can be provided between the upper wall forming the porous flow surface and the impermeable bottom wall. in the air, a particularly great stability can be obtained if it is made that the reinforcement provided in the circular edge is constructed in one piece 4-

with the support structure.

  In order for the introduced compressed air to pass as smoothly as possible through the air-permeable upper wall, holes should be provided in the support structure, whereby the upper wall and the inner wall can be connected to one another. to one another in the zone of these holes, so that too much swelling of the upper wall is avoided, with the deformation

  unfavorable flow surface that would result.

  But for the same purpose, the upper wall may also be connected in points to the support structure itself, for example, radially directed stop strips may be provided on the upper wall, these strips being

  connected to the support structure.

  To save weight and reduce cost, while maintaining precision-shaped manufacturing, the circular edge and support structure can be made of fiber reinforced plastic

of glass.

  Other features of the invention

  will emerge from the description which follows, taken

  In conjunction with the accompanying drawings, in which Figure 1 is a vertical section of a flow device according to the invention, Figures 2 to 4 show details of points II to IV of the flow device which is FIGS. 5 and 6 show details corresponding to FIGS. 2 and 4, of another embodiment of a flow device according to the invention. FIG. 7 is a view of FIG. in plan of the lower zone shown in Figure 6, the flow device taken along the arrow VII of Figure 6, and Figures 8 and 8 'are a partial section, corresponding to Figures 4 and 5, another example of

embodiment of the invention.

  In the figures, we use for all parts

  the same numerical references.

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  The flow device which is shown in FIGS. 1 to 4 comprises a shaped flow pipe.

  funnel made of sheet metal which is screwed through

  of stirrups not shown, for example on the discharge opening of a silo of a transport vehicle. The flange 2 of the silo tank is held hermetically by the screws of the stirrups, with the interposition of a circular edge 3, for example having a rectangular cross-section, of an interchangeable part 4, against a counter flange of the pipe

  1O flow 1 funnel-shaped.

  The interchangeable part 4 fits the funnel shape of the drain pipe 1 and rests on the inner side thereof. The replaceable part 4 is itself double-walled. The bottom wall 6, which is fitted to the flow pipe 1, consists of an air impervious fabric, preferably coated, while the top wall 7 is porous and breathable. Its inner side forms the flow surface 8. The transported merchandise, not shown, is fluidized by the pressurized air resulting from the injection of air under pressure into the space between the walls 6 and 7, and can , thus disintegrated, flow through the outlet 9 on the lower edge 10 of the replaceable part 4, and by the junction tubing 11 in a

  discharge pipe not shown.

  As clearly shown in FIGS. 2 and 4, the walls 6 and 7 are connected to one another tightly and securely in the area of the outlet 9 at the bottom and in the area of the surface of the counter-flange 5. above. In the area of the surface of the counter flange 5, the edge 3 is reinforced and stiffened, so that easy placement of the replaceable part 4 in the flow pipe

  i is possible without significant deformation.

  At the location designated by the circle 3 is provided in the replaceable part 4 a screw connection 12 which rises in a hole 13 between the walls 6 and 7. The edge of the hole 13 is screwed tightly on the screw connection 12 by flange surfaces. The screw connection 12 is itself introduced through the flow pipe 1 into a hole 15 and is

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  screwed tightly on a tubular nut 16 with the interposition of seals not shown, and is connected to a compressed air supply line, which is not shown either. The screw connection is held tightly against the bottom wall 6 by a special ring 17 and a special screw 18. To prevent the walls 6 and 7 from moving sharply apart from one another when the compressed air enters, these walls are connected to one another along radial joints 19 and 20. Thus, the seals 19 which go from the circular edge 3 to the lower edge 10 are interrupted in the middle zone. Compressed air can flow into this area 21 without joints. Between these long seals 19 are arranged shorter seals 20 which leave the circular edge 3 and go only to the zone

  median, as clearly shown in Figure 1.

  With little manipulation, it is possible to replace the part 4 which is held between the flanges 2 and 5, or to raise it to check and clean it, and the part can also be completely removed at the minimal cost of the interchangeable part 4 when the goods to be transported

  lends itself to emptying without pneumatic disintegration.

  In the second embodiment which is shown in FIGS. 5 to 7, the interchangeable part 4 is a single-wall porous thin sheet and is held as well against the upper edge 3 as against the lower edge 10, the upper edge 3 being constructed on the other hand, in the lower edge 10 is disposed a metal ring 22 for fixing and holding, which is housed in a recess 23 of a clamp collar 24 of the drain pipe 1. The flange collar 24 carries an internal thread 25 for a threaded ring 26, which holds and fixes the interchangeable part 4, with its metal ring 22,

on a shoulder 27.

  For the rotation of the threaded ring 26, it is provided with three grooves 28, in which the arms 29 of a star-shaped threaded cartridge 30 are raised. This star-shaped cartridge serves not only to tighten and loosen the threaded ring 26, but at the same time stop for agglomerates of bulk goods and for large bulk goods, and for bulk goods. which are too big to be able to pass through exit 9. For tightening and loosening, for example using an axle key, the step cartridge

  screw 30 has a hexagonal face 31.

  As clearly shown in Figure 6, bottom right, there is provided below the flange collar 24 a junction tubing 32 for the removable connection of a discharge line. To prevent a fall of the screw cartridge 30, stoppers 33 are

  welded on the upper side of the arms 29.

  The interchangeable part 4 may, depending on the bulk goods to be transported, be composed of various materials, for example metal fabric, but preferably polyester fabric, which, in addition to its good formability, is also easy to clean and to clean. maintain clean, and which is also resistant to many of the chemicals that must be transported and discharged mainly with the flow device according to the invention. In the construction variant shown in FIGS. 8 and 8 ', there is provided between the upper wall 7 and the lower wall 6 a support structure 34 which is made in one piece with the reinforcement 35 in the circular edge. 3. It consists of

  preferably a plastic material reinforced with glass fiber.

  In the support structure 34 are provided holes, preferably radial, not shown either, in the area of which the upper wall 7 and the lower wall 6 of the interchangeable part 4 are connected to each other by the joints 19, 20. In the area of the screw connection 12, a hole 36 is provided in the support structure 34 for the

passage of primary air.

Claims (17)

  1. Device for draining a tank for   powdery or granular bulk material, having a downward cone-narrowing flow pipe on the narrow section of a joining pipe for a discharge pipe, -in which at least the surface   this funnel-shaped internal flow is composed of   of a thin sheet of porous material, may be   to increase the fluidity and slippability of bulk goods under the effect of compressed air, and is fixed at least on the upper circumference of the   the funnel, in the form of a replaceable part,   in that, for fixing on the upper edge   (3), the replaceable part (4) presenting the listening surface   porous (8) is annularly reinforced and is now   held between a flange surface (2) of the reservoir and a   counter-flange surface (5) of the flow pipe (1).   Flow device according to claim 1,   characterized in that the replaceable part (4) which is   held on its outer top edge (3) has a construction   double wall, the upper wall (6) is porous and the   lower king (7) is impervious to air and rests on the funnel-shaped drain pipe (1), the common edge   lower part (10) of the upper wall (6) and the inner wall   (7), which forms an outlet (9) for the goods to be transported thereby connecting the two walls to one another hermetically.   Flow device according to Claim 2, characterized in that the upper wall (6) and the lower wall (7) are firmly connected to one another by means of substantially radial joints (19, 20). area (21) without joints being provided between the upper outer edge (3) and the lower inner edge (10), the space between   the two walls (6 and 7) being able to be supplied with compressed air at least one point.   4. Flow device according to claim 3, characterized in that the seals (19) extending from the outer edge (3) go to the inner edge (10) but are interrupted, and between these seals (19) are provided intermediate seals (20), also starting from the outer edge (3), but stopping substantially in the area éL (ediane. Flow device according to Claim 3, characterized in that, in view of the compressed air supply, the bottom wall (6) passes through a screw connection (12) through a hole (13). ), and the edges of this hole (13) are held hermetically between flanges (14) and rings (17) of the screw connection (12), and in that the screw connection (12) is fixed in the wall of the drain pipe (1) which rises through this one.   Flow device according to claim 1, characterized in that the porous replaceable part (4) which forms the flow surface (8) is also held hermetically and securely on the lower inner edge.   drain pipe (1) and can be supported by the   king of the funnel, and in that pressurized air can   be inserted into the free space between the replacement   çable (4) and the wall of the drain pipe (1).   Flow device according to Claim 6, characterized in that the lower inner edge (10) of the replaceable part (4) is reinforced by a ring (22) of circular cross section and is held by a ring   threaded portion (26), the inner cross-section of the inner ring   left (26) thus being in direct connection with the tubing junction (32).   Flow device according to Claim 7, characterized in that the threaded ring (26) has   grooves (28) for a threaded cartridge (30) in form star me.   Flow device according to Claim 8, characterized in that the screw cartridge (30) carries   a stopping heel (33) on each of its arms (29) which sere in the grooves (28).   Flow device according to claim 7,   characterized in that the replaceable part (4) is   held and can be tensioned by a shoulder (27) of the threaded ring (26), which can be introduced from the outside   by sliding in a recess (23) of the hose of (1).   11. Flow device according to any one of   Claims 2 to 10, characterized in that a structure   support (34) adapting to the shape of the discharge pipe   (1) is provided between the upper wall (7) which forms the porous flow surface (8) and the lower wall   (6) impervious to compressed air.   ] 5 Flow device according to claim 11, characterized in that the reinforcement (35) provided in the circular edge (3) is constructed in one piece with the support structure (34).   13. Flow device according to one of claims 3, 4 and   1, characterized in that the supporting structure (34)   holes, and the upper wall (7) and the lower wall (6) are connected to one another by seals (19, 20) in the area of these holes.   14. Flow device according to one of the claims   11 or 12, characterized in that the upper wall   (7) is connected in points to the support structure (34).   Flow device according to claim 14,   characterized in that stop bands substantially   dials are provided on the top wall (7) and these   stoppages are preferably connected to the structure of support (34).   16. Flow device according to any one of   Claims 1 to 15, characterized in that the reinforcement   (35) the circular edge (3) and the support structure (34) consist of a plastic material reinforced with glass fibers. Flow device according to claim 1, characterized in that the support structure (34) has a hole (36) in the region of the screw connection (12). Il Description Pages certified true to the original