DE20206436U1 - Transport and storage containers for liquids - Google Patents

Description

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PROTECHNA S.A.

Description Title: Transport and storage containers for liquids

The invention relates to transport and storage containers for liquids, with a pallet-like base frame, an exchangeable, cuboid-shaped or cubic inner container made of plastic with four side walls, a lower and an upper base, an upper closable filler neck and a lower outlet neck with a removal fitting and an outer casing surrounding the inner container, which is formed from vertical and horizontal metal grid bars, wherein the inner container is formed with a permanently antistatic outer layer made of plastic with a conductive carbon black content.

When filling and emptying liquid containers of this type known from DE 196 05 890 Al and when stirring liquids in such containers, e.g. for mixing purposes, electrical charges arising from liquid friction on the container surface are discharged into the ground via the permanently antistatic outer coating of the inner container and the metal base frame. Electrical discharges with spark formation between the plastic inner container and the metal mesh casing, which can lead to the ignition of flammable filling materials in the transport and storage container as well as of explosive mixtures of gases and vapors in enclosed spaces, are thus excluded.

A disadvantage of the known transport and storage container is that due to the black color of the plastic inner container, an optical fill level control is not possible.

The invention is based on the task of

to equip generic transport and storage containers for liquids with an optical level indicator.

This object is achieved according to the invention by a transport and storage container with the features of claim 1.

The subclaims contain expedient further developments of the invention.

The transport and storage container according to the invention is characterized by the following advantages:

The optical level indicator with four viewing strips made of translucent or transparent plastic material integrated into the corner areas of the black-colored wall of the plastic inner container and at least one level indicator scale attached next to a viewing strip on the outer wall of the inner container enables the amount of filling material in the container to be checked quickly and easily. The permanently antistatic outer layer of the plastic inner container prevents the container from becoming electrostatically charged when filling or removing the liquid filling material. Finally, the black coloring of the plastic container with soot ensures effective protection of both the container and the filling material against ultraviolet radiation.

The pallet container according to the invention is explained in more detail below with reference to a drawing.

The transport and storage container 1, which can be used as a single-use and reusable container and is preferably used for liquids, has as main components an exchangeable, cuboid-shaped inner container 2 made of polyethylene with a front wall 3, a rear wall 4 and two side walls 5, 6, a lower floor 7 designed as a drain floor, an upper floor 8 with a filler neck 9 that can be closed by a screw cap 10 and an outlet nozzle 11 in the lower section of the front wall 3 with a removal fitting 12, an outer shell 13 made of intersecting vertical and horizontal metal grid bars 14, 15, a pallet-like base frame 16 with a base pan 17 made of sheet metal to accommodate the plastic inner container 2 and two cover bars 18 made of metal to protect the inner container 2.

The front wall 3, rear wall 4, side walls 5, 6 and the lower and upper bases 7, 8 of the plastic inner container 2 made from high-density polyethylene by extrusion blow molding consist of a middle layer, an inner layer and a permanently antistatic outer layer with a conductive carbon black content that ensures a surface resistance of < 10 ⁹ Ω. The thickness of the middle layer is 1 to 2 millimeters, preferably 1.5 millimeters, and the thickness of the outer and inner layers is 0.1 to 0.5 millimeters, preferably 0.2 millimeters.

Recycled polyethylene granulate or ground material is used to produce the middle layer, and new polyethylene granulate is used as the starting material for the outer and inner layers.

The plastic inner container 2 is equipped with an optical level indicator, which is located in the four corner areas

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19 - 22 of the inner container 2, the viewing strip 23 is made of translucent or transparent polyethylene, which forms a homogeneous connection with the polyethylene of the front wall 3, the rear wall 4 and the side walls 5 and 6. On the outside of the front wall 3, next to a viewing strip 23, a level indicator scale 24 is attached.

The screw cap 10 for closing the filler neck and the removal fitting 12 of the inner container 2 are made of an electrically conductive plastic, preferably polyethylene with a conductive carbon black content.

Deviating from the described embodiment, the extraction fitting of the inner container can be electrically earthed via an earthing part arranged within the flow opening of the fitting.

The base pan 17 of the base frame 16 stands with a certain ground clearance on corner and center feet 25, 26 and a foot frame 27 or runners, so that the base pan 17 can be driven under from four sides by the gripping arms of a transport device, e.g. a forklift truck, to transport the transport and storage container 1. The feet 25, 26 and the foot frame 27 or the runners are made of metal or an electrically conductive plastic, e.g. polyethylene with a conductive carbon black content, so that the transport and storage container 1 is electrically earthed by the base frame 16. The pallet-like base frame 16 of the transport and storage container 1 has length and width dimensions that comply with European standards.

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PROTECHNA S.A.

Reference symbol

1 transport and storage container

2 plastic inner containers

3 Front wall of 2

4 Back wall of 2

5, 6 side walls of 2

7 lower floor of 2

8 upper floor of 2

9 filler neck in 8

10 screw caps for 9

11 outlet nozzles from

12 Extraction fitting

13 Outer jacket

14 vertical lattice bar of

15 horizontal bars of

16 Base frame

17 Floor tray

18 Flat bar 19-22 Corner areas of 2

23 visibility strips

24 Level indicator scale

25 corner feet of 16

26 metatarsal of 16

27 foot frames of 16

Claims (10)

1. Transport and storage container for liquids, with a pallet-like base frame, an exchangeable, cuboid or cubic inner container made of plastic with four side walls, a lower and an upper base, an upper closable filler neck and a lower outlet neck with a removal fitting and an outer casing surrounding the inner container, which is made of vertical and horizontal metal grid bars, the inner container being equipped with a permanently antistatic outer layer made of plastic with a conductive carbon black content, characterized in that the inner container (2) has an optical fill level indicator with at least one integrated viewing strip (23) made of translucent or transparent plastic material, which forms a homogeneous connection with the plastic material of the container walls (3-6), and a fill level indicator scale (24) attached next to the viewing strip (23) on the outside of the inner container (2). 2. Container according to claim 1, characterized by viewing strips (23) integrated into the four corner regions (19-22) of the inner container (2), wherein at least one viewing strip (23) is assigned a level indicator scale (24). 3. Container according to claim 1 and 2, characterized in that the plastic inner container (2) is designed as a multi-layer container and is produced by extrusion blow molding. 4. Container according to claim 3, characterized in that the plastic inner container (2) has a middle layer, a permanently antistatic outer layer and an inner layer. 5. Container according to claim 3 and 4, characterized by a plastic inner container (2) with a middle layer and a permanently antistatic outer and inner layer. 6. Container according to one of claims 3 to 5, characterized in that the middle layer of the inner container (2) consists of a high-density polyethylene, recycled granulate or ground material being used as the starting material. 7. Container according to one of claims 3 to 6, characterized in that the outer layer and/or the inner layer of the inner container (2) consists or consists of a high-density polyethylene with a proportion of conductive carbon black, wherein new granulate is used as the starting material. 8. Container according to one of claims 1 to 7, characterized by a screw cap (10) made of an electrically conductive plastic, in particular polyethylene with a conductive carbon black content, for closing the filler neck (9) of the inner container (2). 9. Container according to one of claims 1 to 8, characterized in that the removal fitting (12) of the inner container (2) is made of an electrically conductive plastic, in particular polyethylene with a conductive carbon black content. 10. Container according to one of claims 1 to 8, characterized in that the removal fitting (12) of the inner container (2) is electrically earthed via an earthing part arranged within the flow opening of the fitting.