EP1462386B1 - Transport and storage container for liquid - Google Patents

Description

The invention relates to a transport and storage container for liquids, with a pallet-like base electrically conductive metal or an electrically conductive Plastic, one standing on the base, exchangeable, single or multi-layer inner container Plastic with an electrically conductive outer layer for electrical grounding of the container outer surfaces, which as cuboid or cubic container with four side walls, a lower and an upper floor, a closable one Filler neck at the upper floor and one at a side wall in the Area of the lower floor arranged outlet to the Connection of a removal fitting is formed, and with a the outer container surrounding outer sheath of metallic Bars or sheet metal

A well-known from DE 101 24 681 A1 transport and Storage container of this kind for liquids is with one electrical grounding of the plastic inner container, which has an electrically conductive region, the in one piece from an inside to an outside of the Inner container is guided. The plastic inner container has an electrically conductive outer layer, which together with the outer sheath of metallic bars or sheet metal and the metallic subframe as an external electrical ground serves to create an electrically static charge on the surface of the Plastic inner container due to friction during transport and during Handling of the container to prevent.

For electrical grounding of the filling space of the Plastic inner container is the removal fitting of the container used, which is designed as a slide, which by means of a Union nut on the outlet of the inner container is attached and its inlet nozzle in the filling space protrudes. The slider housing has an inner and a outer lacquer layer with electrically conductive polymers. Electric charges that occur during filling and emptying of the Inner container and while stirring liquids in the Inner container for example for mixing purposes Liquid friction on the inner surface of the container and in the Fluid will emerge over the slide housing that is out made of an electrically conductive material Union nut, the outer layer of the inner container, the Outer jacket of the transport and storage container and its derived pallet-like base.

The permanent antistatic equipment of the removal fitting of the Inner container used for the internal electrical grounding of the Inner container of the transport and storage container required is, leads to an increase in the cost of manufacturing Container.

DE 197 31 518 A1 describes a transport and Storage container for liquids, by a on the Plastic inner container fitted grid hood made of thin Metal wire or an applied on the inner container electrically conductive network or fabric is electrically grounded. By this outer grounding only those on the Container surface occurring electrical charges derived. Furthermore, the electrical ground of the Liquid container through a grate hood, a net or a Tissue technically complex and leads to a corresponding Increase in production costs.

In a transport described in DE 198 15 082 A1 and storage container for liquids is in the outlet pipe the internal container mounted removal fitting a grounding part arranged out as a curved sheet or plate Metal is formed, which extends over a portion of the Inner bore of the sampling valve extends and over a Fixing screw and a grounding cable to the base the container is connected. Through this inner grounding Only those in the liquid due to Fluid friction of forming electrical charges derived. Furthermore, in this liquid container, the Danger that during transport and storage of aggressive Liquids the grounding part of the liquid so it is damaged that the electrical grounding is no longer is functional.

The invention is based on the object, the generic transport and storage containers for liquids with a view to a secure and comprehensive grounding of the Plastic inner container and a low-cost production further.

This object is achieved by a Transport and storage containers for liquids with the features of claim 1

The subclaims include advantageous and expedient Further developments of the invention.

The invention is based on a transport and Storage container for liquids, with a multi-layered Plastic inner container with an electrically conductive Outer layer, as a grid shell made of metal or as Metal jacket trained outer sheath and a Pallet-like base made of metal or an electric conductive plastic is fitted, the outer cylindrical End of the externally threaded outlet nozzle, the is integrally blow molded with the inner container body, to a Inner ring with an annular, electrically conductive Feed the inner layer, with the liquid contents in Contact stands and thus an inner grounding of the filling space of the Inner container forms, so that electrical charges during the Transport by mutual friction of inner container and Outer jacket occur on the container surface and the when filling and emptying the transport and storage container and when stirring liquids in the container e.g. to Mixing by fluid friction in the liquid form over the electrically conductive inner and outer layer the outlet nozzle of the inner container, the outer layer of the Inner container, the outer jacket and the base in the Be derived from soil. Due to the electrically conductive Formation of the outlet nozzle of the inner container, in whose Flow opening during the removal of liquid from the Container due to the discharge speed of the liquid largest fluid friction occurs in the container becomes a electrostatic charge of the liquid and the container a simple and effective way avoided. The electric Grounding of the container surface of the plastic inner container and in this to be transported or stored Liquids also allows the use of transport and Storage container as hazardous goods container for flammable Liquids and emulsions such as solvents, paints and varnishes with a flash point <61 ° C as well as the use of the container in Operating rooms in which an explosive atmosphere through Gases, vapors and fog can form.

Fig. 1

eine perspektivische Darstellung eines Transport- und Lagerbehälters und jeweils in vergrößerter Darstellung

Fig. 2

einen Vertikalschnitt des Auslaufbereichs des Behälters mit einer an den Auslaufstutzen des Innenbehälters angeschraubten Entnahmearmatur sowie

Fig. 3

einen Teillängsschnitt des Auslaufstutzens des Innenbehälters.

The transport and storage container for liquids according to the invention is explained below with reference to drawing figures, which represent the following:

Fig. 1

a perspective view of a transport and storage container and each in an enlarged view

Fig. 2

a vertical section of the outlet region of the container with a screwed to the outlet nozzle of the inner container removal fitting and

Fig. 3

a partial longitudinal section of the outlet nozzle of the inner container.

The usable as disposable and reusable container transport and Storage container 1 for liquids has as main components one interchangeable, cuboid inner container 2 made of polyethylene with an end wall 3, a rear wall 4 and two side walls 5, 6, a lower designed as a drainage bottom 7, a upper floor 8 with a through a screw 10th closable filler neck 9 and one on the end wall. 3 arranged in the region of the lower bottom 7 outlet 11th for connection of a removal fitting, as the flap valve 12 or Ball valve is formed, an outer shell 13 of itself crossing vertical and horizontal bars 14, 15 off Metal, a pallet-like base 16 with a flat Floor pan 17 made of sheet metal, on which the inner container 2 is, and two flat bars 18 made of metal to protect the Inner container 2 on.

End wall 3, rear wall 4, side walls 5, 6 and lower and upper floor 7, 8 of high-density polyethylene Extrusion blow molding produced plastic inner container 2 consist of an inner layer 19, a middle layer 20 as well an electrically conductive outer layer 21 with a Conductive soot. The thickness of the middle layer 20 is 1 to 2 Millimeters, preferably 1.2 millimeters and the strength of the Inner and outer layer 19, 21 0.1 to 0.5 millimeters, preferably 0.2 millimeters.

For the production of the middle class becomes a recycled Granules or regrind of pure polyethylene and / or Polyethylene with a Leitrußanteil used, and as Starting material for the inner and outer layers 19, 21 serves a new polyethylene granules.

The provided with an external thread 22 outlet nozzle 11th of the inner container 2 is connected to the inner container body 23 blow molded in one piece and the outer cylindrical end 11a of the an electrically conductive outer layer 24 having Outlet nozzle 11 is connected to an inner ring 11 b with a annular, electrically conductive inner layer 25 retracted, for electrical grounding of the filling space 26 of the inner container 2 with the present in this liquid product in contact stands. The inner layer 25 and the outer layer 24 of the Outlet nozzle 11 and the outer layer 21 of the Inner container body 23 form a homogeneous electrically conductive layer.

Made of a high-density polyethylene Tap housing 27 of the valve cock 12 takes a disc 28th for opening and closing the central flow opening 29 of the Housing chamber 30 which communicates with the inlet channel 31 of the Inlet nozzle 32 and the outlet channel 33 of the outlet nozzle 34 of the valve housing 27 is in communication. The disc 28 is eccentrically attached to a rotary shaft 35, one of which End 35a is rotatably mounted in the valve housing 27 and their other end 35b via a bearing socket 36 from the tap body 27 protrudes outward. The rotary shaft 35 is by means of sealing rings 37 sealed in the bearing neck 36 to the outside. On the off the cock housing 27 projecting end 35b of the rotary shaft 35 is a handle 38 for opening and closing the flap valve 12th appropriate.

The flap valve 12 is by means of a union nut 39 Metal or plastic that comes with a tamper evident 40 is equipped, at the outlet nozzle 11 of the Plastic inner container 2 of the transport and storage container. 1 attached.

When unscrewing the captive on the inlet pipe 32nd of the cock housing 27 seated union nut 39 on the Outlet 11 of the inner container 2 of the transport and Storage container 1 is a on the inlet pipe 32 of the Hahngehäuses 27 seated sealing ring 41 between a collar 42nd the inlet nozzle 32, to which the union nut 39 with a Ring lug 43 attacks, and the end face 44 of the Spout 11 of the inner container 2 clamped and thus a liquid-tight connection between the Klappanhahn 12th and reaches the inner container 2.

The outer end 45 of the outlet nozzle 34 of the valve housing 27th has an external thread 46 for screwing on a protective cap 47th during transport and storage of the container and to Attachment of an emptying hose.

The high-density polyethylene plastic gives the Tap body 27 has a limited elasticity, which is a dense Closed position of the valve disc 28 of the flap valve 12 by an elastic expansion of the valve seat of the valve housing 27 in the closed position of the disc 28 allows.

The liquid product in the filling chamber 26 of the inner container. 2 is about longitudinal grooves 48 on the outer circumference of the in the Outlet nozzle 11 of the inner container 2 used Einlaufstutzens 32 of the flap valve 12 with the electric conductive inner layer 25 of the inner ring 11b of Outlet nozzle 11 of the inner container 2 in contact.

The bottom pan 17 of the undercarriage 16 of the transport and Storage container 1 is available with a certain ground clearance Corner and middle feet 49, 50 and a foot frame 51 or runners, so that the bottom pan 17 for transporting the container of four Sides of the gripper arms of a transport device, e.g. one Forklift, can be driven under. The feet 49, 50 and the Foot frame 51 and the runners are made of electrically conductive Metal or an electrically conductive plastic, e.g. Polyethylene produced with a Leitrußanteil, so that the Plastic inner container 2 of the transport and storage container. 1 an external electrical ground of the container surface 52 and an internal electrical grounding of the filling space 26 over the electrically conductive outer layer 21 of the inner container 2 or the electrically conductive inner and outer layer 25, 24 of the Outlet nozzle 11 and the electrically conductive outer layer 21st the inner container 2 and the outer casing 13 and the Undercarriage has and thereby electrical charges, the the surface 52 and on the inner wall 53 of the inner container. 2 as well as in the liquid filling material in the filling space 26 of the inner container occur, are derived in the soil.

Claims (4)

1. Transport and storage container for liquids with a pallet-like substructure made of electrically conductive metal or an electrically conductive plastic, a replaceable, single- or multi-layer inside container standing on the substructure and made of plastic with an electrically conductive outer layer for electrical earthing of the outer surfaces of the container, said inside container being configured as a parallelepipedal or cubic container with four side walls, a lower and upper base, a sealable filler connection on the upper base and an outlet connection arranged on a side wall in the region of the lower base for connection to a drain valve, and also with an outer casing of metal lattice bars or sheet metal surrounding the inside container, characterised in that the outer cylindrical end (11a) of the outlet connection (11), which is provided with an external thread (22), is blow-moulded in one piece with the body (23) of the inside container and has an electrically conductive outer layer (24), is drawn in to an internal ring (11b) with a ring-shaped electrically conductive inner layer (25), which is in contact with the liquid filling material for electrical earthing of the filling chamber (26) of the inside container (2), and that the inner and outer layer (25, 24) of the outlet connection (11) and the outer layer (21) of the body (23) of the inside container form a homogeneous electrically conductive layer for the internal and external electrical earthing of the plastic inside container (2).
2. Container according to Claim 1, characterised by a triple-layer structure of the inside container (2).
3. Container according to Claim 2, characterised in that the inner layer (19) and the outer layer (21) of the inside container (2) are made of a high-density polyethylene, wherein new value granulate is used as starting material and the electrically conductive outer layer (21) contains a conductive carbon black component.
4. Container according to Claim 2 and 3, characterised in that the middle layer (20) of the inside container (2) is made of a high-density polyethylene.
   wherein recycled granulate or ground material composed of pure polyethylene and/or polyethylene with a conductive carbon black component is used as starting material.

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