EP1076008A1 - Method and apparatus for emptying bulk bags - Google Patents

Abstract

The emptying station for bulk-bags containing particulate material comprises a box with a funnel-shaped outlet (2, 3) at the bottom. The bag (10) is held on a lift device (16) and opened by three cutter blades (4a) forming a pyramid with a spike (4b) at its point. The novelty is that the lift carries a lock (14) for the box and a seal (7) closes the space between the bag and box below the holders (15) for the bag. An Independent claim is included for a method of emptying a bulk-bag using the station.

Description

The invention relates to an emptying station for bulk bags, especially bulk bags for particulate hazardous goods, such as Cyanuric chloride. For emptying, a Opening device based on at least three pyramid-shaped and with the cutting edge upwards Knives and a vertical mandrel at the top of the pyramid the bulk bag was pierced and cut open on the bottom. By means of the emptying station, the bulk bags can be both empty dust-free and safely as well as the bulk bag rinse after emptying.

For emptying bulk bags, including bulk containers with in particular 100 to 1000 kg filling weight from a single or multilayer sack material are understood different devices become known. According to DE patent 196 41 982 malfunctions when emptying a bulk bag comprising an inner bag and an outer bag as well as avoid contact with the bulk material if an emptying device described in this document is used. The device comprises a Holding device for the bulk bag, one underneath arranged container-shaped open at the top Double tube device, a liftable and lowerable Locking ring for closing the upper end of the two tubes formed ring gap as well as gripping and Pulling devices for gripping and tightening the Outlet neck of the inner bag. This device enables a safe emptying of powdery Bulk materials, such as cyanuric chloride, but the handling is somewhat complex. This emptying station also does not contain any Devices to empty the bulk bag before its Flushing disposal.

During the bulk bag according to the previously recognized document is emptied by opening the sack neck, it is too known, a hanging on a carrying device bulk bag by lowering onto an opening device on the bottom cut open and thereby emptied. In the Opening device is in the trade Available so-called pyramid knives: Here are at least three, with bulk bags with essentially rectangular cross section, preferably four knives with their Cutting edge arranged pyramid-shaped, and on the At the top of the pyramid is a piercing thorn of the sack bottom. The pyramid knives are usually in an outlet device provided with an outlet for arranged the bulk bag. Using a rubber sleeve between the bulk bag and the cradle tries to reduce dust when emptying Reduce. However, this is only partially successful, so that this Device for emptying filled with dangerous goods Bulk bags are unsatisfactory. Such Discharge stations are also not intended for the Bulk bag immediately after emptying it with a rinse out liquid rinsing medium to the sack wall to remove or rinse off adhering components.

The object of the present invention is accordingly a Show emptying station for bulk bags, which are for dust-free and safe emptying of dangerous goods is suitable and after emptying in a simple manner allows the inner bag to be rinsed.

An emptying station for bulk bags was found, especially bulk bags for particulate dangerous goods, comprising an outlet (3) Bulk bag holder (2), one Opening device (4) based on at least three pyramid-shaped and with its cutting edge upwards arranged knives (4a) and a vertical mandrel (4b) at the top of the pyramid and above the opening device a lifting and lowering carrying device (16) for the its holding device (12) held bulk bag (10), which is characterized in that the Cradle with vertical arranged on it Walls (1a) an open top, the opening device enclosing box (1) forms the height of the walls, measured from the base of the opening device, at least the height of the bulk bag including its Holding device corresponds to the carrying device (16) a closure device (14) for the box is and a device in the lower half of the box (7) to seal the between the bulk bag and the Box wall formed gap is arranged.

So much for the emptying station for flushing the bulk bag is within the range of the knives formed pyramid one or more spray nozzles (6) in addition Supply line (s) (9) arranged for a flushing medium. The other claims are directed towards preferred Embodiments of the emptying station and on the Process for emptying a single or multi-layer Bulk bags with an essentially flat bottom underneath Use of the emptying station according to the invention.

The cross section of the box (1), which consists of the on the Mounted device (2) and with this connected walls (1a) is formed, can be round, rectangular or be square and essentially corresponds to that Cross section of the filled bulk bag with one for the Handling necessary wall gap. It is particularly useful it, a box with a rectangular, in particular Quatratic form to use, because appropriate bulk bags are commercially available. The wall height of the box must be such that the entire bulk bag (10) including its holding device (12), usually it is around seat belts, with the closure device closed (14) and fully penetrated into the bulk bag pyramid-shaped arranged knives (4) fits into this box. The opening device (4) is usually in the lower half of the box, preferably at the base, arranged. The base of the box is also with the Receiving device (2) connected. The cradle is more conveniently funnel-shaped and contains an outlet centrally at its lowest point, for example a nozzle (3). This nozzle is when emptying expediently directly with an inlet connection of the Reactor in which the bulk goods are further implemented should be connected, for example by means of a tubular coupling.

The emptying station contains so-called pyramid knives (4a). These are arranged in the lower half of the box, expediently at the base of the same. in case of a round cross section of the box contains the Opening device at least three pyramid knives, at a rectangular box usually four Pyramid knife. The knives are at their top connected to each other and above the top is a Thorn (4b). The pyramid knives form with the horizontal generally an angle in the range of 30 to 75 °, in particular 45 to 60 °. The upward facing Cutting the pyramid knives allow a full surface Open the bottom of the bulk bag.

To avoid dusting from the box (1), includes this at least one device (7) for sealing the Gaps between the bulk bag and the box wall. It can several at different heights of the box wall Sealing devices can be arranged. Both Sealing devices can be one or act multi-part sealing lips. A suitable one Sealing device exists with emptying stations rectangular box cross section in that at each Box wall a sealing plate (7a) made of a flexible Plastic is fixed to a flange (17); this Sealing plates are removed when the bulk bag is lowered pressed down and thereby seal the gap.

Figur 1 zeigt in schematischer perspektivischer Darstellung eine bevorzugte Entleerstation.

Figur 2 zeigt einen Querschnitt durch den Kasten, in der in Figur 1 dargestellten Ebene II-II.

Figur 3 zeigt einen Längsschnitt durch die Entleerstation mit einem darin befindlichen Bulk-Bag, wobei sich die Pyramidenmesser bereits im Sackinneren befinden und die durch das Aufschneiden gebildeten dreieckförmigen Lappen nach unten hängen.

Figur 4 zeigt einen Bulk-Bag mit quadratischem Querschnitt und flachem Boden. Der Bulk-Bag umfaßt einen Innensack und Außensack sowie Haltegurte.

For emptying bulk bags filled with dangerous goods, the emptying station also contains devices for rinsing the inside of the bulk bag and, if necessary, additional devices for rinsing the outside. This ensures that the dangerous goods do not adhere to the empties and that the emptied bulk bag can be disposed of safely. Spray nozzles (6) are suitable for rinsing, which are arranged within the pyramid formed by the pyramid knives such that their tip is arranged below the plane formed by two knives in each case. The one or preferably several spray nozzles are aligned in such a way that the entire inner bag can be reliably rinsed out. The supply line (9) for the one or more spray nozzles is advantageously also located within the pyramid and preferably under one of the knives.

Figure 1 shows a schematic perspective view of a preferred emptying station.

Figure 2 shows a cross section through the box, in the plane II-II shown in Figure 1.

FIG. 3 shows a longitudinal section through the emptying station with a bulk bag located therein, the pyramid knives already being inside the sack and the triangular flaps formed by the cutting hanging down.

FIG. 4 shows a bulk bag with a square cross section and a flat bottom. The bulk bag includes an inner bag and outer bag as well as straps.

The following list of reference symbols is that in FIGS Features shown in figures.

Reference list

1

box

1a

Box walls

2nd

Cradle

3rd

Exhaust port

4th

Opening device

4a

Pyramid knife

4b

mandrel

6

Spray nozzle

7

Sealing device

7a

Membrane lobes

8th

Inlet connection for flushing medium

9

Supply line for flushing medium

10th

Bulk bag

11

Floor rag

12th

Holding device

12a

Sling

13

Sealing tape for bag binding

14

Locking device

15

hook

16

Carrying device

17th

Flange for fixing the membrane tabs

18th

Inner bag

19th

Outer bag

20th

Flat bottom

21

Fixation seam

The function of the emptying station is shown in FIG described: For emptying a bulk bag using an emptying station according to the invention becomes the bulk bag (10) by means of its holding device (12), usually are lifting straps (12a) on one Carrying device (16), which is also a Locking device (14) for the box comprises, fixed, for example by means of on the carrying device attached hook (15). Expediently, additional also the filler neck of the bulk bag at the closing direction fixed. The carrying device is placed over the box positioned and the bulk bag lowered into it. As soon as the bag bottom reaches the sealing device (7) this depressed and thus the seal against Causes dust. When lowering further the thorn (4b) pierces the sack bottom and the Pyramid knives (4a) cut the flat bottom over the entire floor area. Once the bottom of the sack is through its own weight by means of the mandrel and the pyramid knife is cut open and in the lowest position is located, the closure device (14) closes which is expediently designed as a cover from the Walls (1a) formed box (1). Which is through that Triangular tabs (11) that cut open fall down and allow the outlet of the Bulk goods. The bulk material falls into the holding device (2) and passes through the nozzle (3) into the with the Bulk reactor to be fed. After emptying the Bulk bags is activated by activating the nozzles (6), which over the nozzle (8) and the supply line (9) a liquid flushing medium is supplied, flushed. Such a detergent is expediently used that as a solvent or suspending agent in the intended reaction is used. The in the form of the amount of liquid rinsing medium entering the reactor Flushing medium is used when filling the reactor liquid medium is taken into account accordingly. By the Rinsing the inner bag will not only Danger potentials, as they do not when disposing of one rinsed bulk bags can occur, but avoided at the same time, it is delivered with the bulk bag Material loss-free for the desired implementation Provided. After emptying and rinsing the Inner bags can be added to the inside if necessary Box walls or integrated in the locking device Spray nozzles can also be cleaned externally. After the end The flushing process is emptied using the carrying device and flushed bulk bag from the box (1) drawn. Provided organic solvents for rinsing used, it is advisable to rinse the Inner bags to blow them out with air to Remove solvent residues (not shown).

Bulk bags as shown in Figure 4 and which are suitable for filling with dangerous goods, include in in each case an inner (18) and an outer (19) sack. The inner sack primarily serves to protect the product, must but also have sufficient strength; the outer sack primarily serves the mechanical Strength. Inner and outer bags are common tied separately; by means of a band (13) and / or taped or welded. Commercial bulk bags additionally contain several lifting straps (12a) and means to to stabilize both the shape and the strength to ensure the flat bottom (20); a suitable one Means for this are fixing seams (21).

The emptying station according to the invention is characterized by a simple structure and functional reliability. So far Problems in working hygiene when dealing with Dangerous goods are avoided. With a bulk bag delivered material is lossless to the reactor, in which is to be implemented. The emptying station according to the invention can be exemplified for emptying bulk bags filled with cyanuric chloride use; Water is preferably used as the rinsing medium used because numerous reactions of cyanuric chloride in Be carried out in the presence of water.

Claims (10)

Emptying station for bulk bags, in particular bulk bags for particulate dangerous goods, comprising a receiving device (2) for the bulk bag provided with an outlet (3), an opening device (4) based on at least three pyramids and with its cutting edge above-arranged knives (4a) and a vertical mandrel (4b) at the pyramid tip and a carrying device (16) which can be raised and lowered above the opening device for the bulk bag (10) held on its holding device (12),
characterized by
that the receiving device with vertical walls (1a) arranged thereon forms a box (1) which is open at the top and surrounds the opening device, the height of the walls, measured from the base of the opening device, corresponds at least to the height of the bulk bag including its holding device, the carrying device (16) is equipped with a closure device (14) for the box and in the lower half of the box a device (7) for sealing the gap formed between the bulk bag and the box wall is arranged. Emptying station according to claim 1,
characterized,
that one or more spray nozzles (6) and supply line (s) (9) for a rinsing medium are arranged within the pyramid formed by the knives. Emptying station according to claim 2,
characterized,
that at least one spray nozzle is arranged between each of the two pyramidally arranged knives in the upper half of the pyramid, the tip of which is sunk in the pyramid relative to the plane of the two knives. Emptying station according to claim 1 or 2,
characterized,
that the box has a rectangular, in particular a square, cross-section, the opening device is arranged in the area of the lowest quarter, in particular at the base of the vertical walls, a knife extends from each corner to the pyramid tip and the height of the pyramid is 0.5 to Is 2 times the width of the widest wall. Emptying station according to claim 1 or 2,
characterized,
that the receiving device (2) is funnel-shaped and the outlet (3) is in the form of a pipe socket arranged centrally at the lower end of the funnel. Emptying station according to claim 1 or 2,
characterized,
that the box has a rectangular cross section and the sealing device (7) is in the form of flexible plates (7a) fixed to each wall. Emptying station according to claim 1 or 2,
characterized,
that the bulk bag has an inner (18) and an outer bag (19) and a substantially flat bottom (20). A method for emptying a single or multilayer bulk bag (10) with a substantially flat bottom (20) using an emptying station, comprising an outlet receiving device (2) for the bulk bag, an opening device (4) the base of at least three pyramid-shaped knives (4a) and a vertical mandrel (4b) at the pyramid tip and a carrying device (16) that can be raised and lowered above the opening device for the bulk held on its holding device (12) -Bag, the bulk bag being lowered onto the opening device (4) and its bottom being pierced by the mandrel and cut open by the knives,
characterized,
that an emptying station is used, the receiving device (2) of which, with vertical walls arranged thereon, forms a box (1) which is open at the top and surrounds the opening device (4), the height of the walls, measured from the base of the opening device, at least the height of the bulk Bags including its holding device (12), the carrying device (16) is equipped with a closure device (14) for the box and in the lower half of the box a device (7) for sealing the gap formed between the bulk bag and the box wall is arranged, during and after complete lowering of the bulk bag dusting from the box is avoided by the sealing device (7) and the closure device (14). A method according to claim 8,
characterized,
that an emptying station for emptying an inner bag (18) and an outer bag (19) containing bulk bag (10) is used, which additionally has one or more spray nozzles (6) together with supply line (9) within the pyramid formed by the knives contains a liquid rinsing medium and that after the bulk bag has been emptied, it is rinsed out by activating the spray nozzle (s) (6) and then lifts it out of the box and removed from the carrying device (16). Method according to claim 9,
characterized,
that an emptying station is used which additionally contains spray nozzles for rinsing the outside of the bulk bag in the box and / or on the closure device, and that after the emptying and rinsing of the inner sack, particles adhering to the outside are rinsed off by activating these nozzles.

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