EP1325873A2 - Container for hazardous fluids, in particular water soluble viscous products - Google Patents

Abstract

The container for hazardous liquids, in particular, viscous liquids such as water-soluble lacquers comprises a bottom section (1) consisting of a plastic material with at least an outer electrically conductive surface (5). The metal lid (2) of the container is coated on its inner surface with a plastic material.

Description

The invention relates to a dangerous goods container for liquid, in particular viscous, water-soluble dangerous goods, in particular water-soluble paints, with a dangerous container receiving the bottom of the container and a plastic Container lid, which with the container lower part over a metal existing Clamping ring is connectable, wherein the container with removed container lid has a large-area opening that at least a majority of Deck surface of the container makes.

Dangerous goods containers for liquid hazardous goods must meet a number of requirements meet both on the transport of the dangerous goods as well refer to the filling or emptying of the dangerous goods.

To approve a container for the transport of a liquid hazardous substance To gain this, it must first pass a case test. Also at one Temperature of minus 18 ° C, the tightness of the container after a fall be ensured from a predetermined height. Furthermore, the container has a withstand prolonged external pressure, as in a stacked transport can occur, and at an elevated temperature. Furthermore, the container must can absorb an increased internal pressure without its tightness to lose. Depending on the contents of the required internal pressure in the range of 1 to 2.5 bar and the duration of the pressure test is 30 min.

When filling or emptying a highly flammable liquid hazardous substance there must be sufficient grounding with the one in the tank fluid is in communication. By this grounding will be static charges prevented, which otherwise via spark discharges too cause an explosion hazard.

Conventional dangerous goods containers for highly flammable liquids exist mostly made of metal. Metal containers can be grounded during filling and emptying to increase the risk of explosion associated with static charges avoid. Such metal containers can also relatively easily in one for the Transportation of a dangerous good suitable way to be designed so that Both the drop test and the tests under application of an external pressure or Internal pressure to be passed.

To open and close such metal containers can screw caps be provided. These are only suitable for relatively small openings of the container. Often, for larger containers, their volume, for example 30 I may be provided relatively large openings, the make up at least a large part of the top surface of the container. While processing of the contents, for example, formed by a viscous paint can be sufficiently accessible due to the large opening, without having to be removed from the container. Through the opening of the Containers may include, for example, mixers, paintbrushes or rollers, or wipers be introduced into the contents. For larger metal containers whose Volume is more than 10 l, are used to attach the container lid on Container bottom often clamping rings provided, which are U-shaped in cross section are formed and both the container lid and a shoulder of the container base spread. To close the clamping ring by contraction Conventionally, actuating levers are provided.

As a container for easily flammable liquid hazardous goods were further already Canisters of conductive plastic used. These have relatively small Einfüllund Emptying holes on, with screw caps from a "normal", non-conductive plastic can be closed. Such canisters are particularly suitable for low-viscosity hazardous goods when using them are to be emptied from the canister.

For water-soluble hazardous goods, such as water-soluble paints in which during filling or emptying no danger of explosion due to static Discharges is usually conventional plastic containers (off non-conductive plastic). Tin metal containers here have the disadvantage that it due to the water-soluble filler too Corrosion of the container may occur, which affects the filler. Although an interior painting of the container is against such corrosion intended. This interior painting can already at low deformations the container wall, as they occur by impacts during transport, get cracks, which leads to corrosion of the underlying sheet.

For larger containers made of plastic, whose volume is 30 I or in the case of a barrel, for example, 225 l, there is the problem here to equip them with an often desired large-area container opening. As already mentioned, such containers have to be approved for transport for dangerous goods, different tests exist. In particular the Internal pressure test leads to problems here. By using a screw cap Although the internal pressure test can be passed, screw caps For larger containers, however, are very unwieldy and can only with Special tools are operated.

A dangerous goods container for water-soluble liquid hazardous goods has already become known in the form of a plastic bag, which has a solid plastic lid has, attached with a metal clamping ring on Kunststoffaß is. This clamping ring is to the plastic cover on Kunststoffaß despite the at to reliably fix an internal pressure occurring deformation of the plastic, very strong and only with a special and expensive Closable equipment that is only available to the bottler. The end user can indeed open the clamping ring for processing the filling material and remove the lid, re-closing the only partially emptied Container by means of the clamping ring is not possible, with the obvious Disadvantages.

From GB 2 192 619 A a dangerous goods container is known which consists of a conductive plastic. For clamping the lid against the container bottom a rotatable locking ring is provided, the extensions with inclined surfaces has, which cooperate with corresponding inclined surfaces of the lid.

From DE 42 42 370 C1 further a reusable plastic drum is known, which of a formed in the form of a blow-molded wide-mouth barrel body Container bottom in combination with one by press-welding or overmolding consists of this fixed, injection-molded bung lid. A conversion to a wide-necked barrel with a removable simple lid or a Bung lid with a clamping ring lock is in this reusable barrel possible. The container base can be made in its interior with a foil bag a plastic film or a metal-plastic composite film. The lid may be provided with an inner lining of a plastic film or a Be equipped with metal-plastic film.

An at least partially made of a conductive plastic transport container, the on its inside with an electrically conductive fiber material is further known from EP 0 501 417 A1.

The filling of easily flammable dangerous goods is carried out in explosion-proof Rooms. In these are often several bottling plants, on which both potentially explosive substances are filled and those which which are not explosive. So far, for the most inflammable Hazardous goods for the reasons mentioned Container made of conductive material used while for the water-soluble, non-flammable hazardous materials Plastic containers were used. It has now been recognized that in In principle, any non-conductive outer surface should be exposed to a potentially explosive atmosphere due to their possible static charge a potential hazard represents. Therefore, legal regulations have already been prepared in the future in explosive rooms only more containers with accordingly conductive surfaces may be used.

The object of the invention is to provide a dangerous goods container for water-soluble, to provide liquid hazardous goods meeting the legal requirements for Transport of such dangerous goods met and also in explosion-proof Rooms can be used easily. Furthermore, this dangerous goods container should be relatively be inexpensive to produce, but it absorbed the dangerous goods Do not interfere, even if the usual during transport and when handling such containers to such acting loads as Shocks. Furthermore, due to a large container opening when removed Cover ensures good accessibility of the contents during its processing his. According to the invention, the solution of this complex task succeeds by the features of claim 1.

Due to the combination of a container bottom made of a conductive plastic with a container lid made of metal, an advantageous closure of the Container lid can be achieved by means of a clamping ring. To the required To ensure tightness of the container at a given internal pressure, This clamping ring can be made stronger than in conventional clamping rings is common for the connection of sheet metal lower parts with sheet metal lids. Yet This clamping ring can advantageously be designed so that it Hand, possibly using an extension lever, open and Conveniently closed again.

Since the container base is made of conductive plastic, no corrosion can occur through the water-soluble filler. Through the plastic coating The cover also prevents its corrosion. Conveniently for the production of the cover a plastic-coated, for example with polyethylene or polypropylene coated sheet used for making the lid is shaped accordingly. The use of such plastic-coated sheet metal for producing a plastic-coated sheet Container bottom parts made of metal, however, would be due to the required welds and the associated destruction of the plastic coating not without further possible.

Fig. 1 einen vertikalen Längsmittelschnitt durch den Behälter (Schnittlinie AA von Fig. 3), wobei das Behälterunterteil, der Behälterdeckel und der Spannring voneinander abgehoben dargestellt sind;

Fig. 2 ein vergrößertes Detail A aus Fig. 1 (im zusammengesetzten Zustand der Teile) und

Fig. 3 eine Draufsicht auf den Behälter bei geöffnetem Spannring.

Further advantages and details of the invention are explained below with reference to the embodiment of the invention shown in the drawing. In the drawing show:

Figure 1 is a vertical longitudinal center section through the container (section line AA of Fig. 3), wherein the container base, the container lid and the clamping ring are shown lifted apart from each other.

Fig. 2 is an enlarged detail A of Fig. 1 (in the assembled state of the parts) and

Fig. 3 is a plan view of the container with the clamping ring open.

An inventive dangerous goods container for liquid, especially viscous water-soluble hazardous goods has a container base 1, at least in consists essentially of a conductive plastic, and a substantially made of metal container lid 2 on. The liquid level of the in the Interior 3 of the container filled dangerous goods is shown in Figs. 1 and 2 indicated by the reference numeral 4. In this watery, liquid Dangerous goods may be, in particular, a viscous water-soluble Lacquer act.

Conductive plastics are known in different forms. To achieve a sufficient conductivity of the plastic can this different conductive admixtures are added, for example soot, Carbon fibers, metal fibers or metal flakes. At least on the outside of the Container bottom part 1, the conductive plastic extends to the outer surface 5 of the container base 1. On the inside could theoretically also a electrically insulating layer, although a conductive training also the inner surface 6 is preferred.

The container lid 2 consists of sheet iron (sheet steel) and at its the Container interior 3 facing bottom is the iron sheet (steel) with a plastic coating 7 provided. Corrosion of the iron sheet 8 becomes thereby prevented. This plastic coating 7 can, for example, of a polyethylene (PE) or polypropylene (PP) layer are formed. The iron sheet the container lid 2 may also have a tin pad and as Tinplate be formed or have a chrome plating and as ECCS sheet be educated. The plastic coating, for example, by a PET film are formed, with or without adhesion promoter on the bottom the container lid 2 is applied.

The volume of the container interior 3 of the manner of a wide-necked barrel trained Container is at least 10 I. For example, the volume of the container interior 30 I amount. But even larger volumes are conceivable and possible, for example, a volume corresponding to a standard drum of 225 I.

To attach the container lid 2 on the container base 1 is a clamping ring 9 provided. This is U-shaped in cross-section and has a Connecting leg 10, one for engagement with the top of the container lid 2 provided upper leg 11 and a projection 16 on the container base 1 overlapping lower leg 12. The projection 16 becomes here from an outwardly and downwardly curved portion of the container wall on formed upper end of the container base. To stabilize are in the circumferential direction spaced reinforcing webs 18 are provided. To the Container lid 2 even with a deformation of the container base 1, in particular due to an internal pressure, the length L of the upper is to be kept safe Leg 11 larger than the length I of the lower leg 12th

At the bottom of the container lid 2, a seal 13 is arranged, which with a support edge 17 of the container bottom part for the container lid cooperates, wherein the container lid 2 with its seal 13 when closed Clamping ring 9 is pressed against the support edge 17 of the container base 1. To apply this contact force, the legs 11, 12, starting from the Connecting leg 10 diverge slightly.

To close the clamping ring 9, wherein the diameter decreases, a lever 14 is provided, as is known in clamping rings.

About the metallic clamping ring can also be the electrically conductive connection between the on the outside metallically conductive container lid 2 and the Container lower part 1, the outer surface is also conductive, ensured become.

When removed from the container lid 2 is a large-scale opening of the container base 1, which in the embodiment shown almost the entire Deck surface 15 of the container makes up.

The bucket-shaped or barrel-shaped in the embodiment shown Lower part is preferably produced by injection molding. For handling the container can be provided in the figures, not shown handles or handles his. The seal 13 may be made of PVC, for example. One at the Production of the seal occurring heat development is in one with a Plastic coating provided metal sheet lid uncritical.

Different modifications of the embodiment shown are conceivable and possible without departing from the scope of the invention. For example For example, the shape of the container may differ from the embodiment shown.

The conductivity of the outer surface 5 is so great that static charges can drain away. Preferably, the inner surface 6 is with equipped with such a conductivity.

Legend to the reference numbers:

1

Container bottom

2

container lid

3

Container interior

4

liquid level

5

Outer surface

6

Inner surface

7

Plastic coating

8th

sheet iron

9

clamping ring

10

connecting leg

11

Upper thigh

12

Lower thigh

13

poetry

14

lever

15

cover surface

16

head Start

17

supporting edge

18

strengthening web

Claims (7)

Dangerous goods container for liquid, in particular viscous, water-soluble dangerous goods, in particular water-soluble paints, with a hazardous substance receiving container bottom part (1) made of plastic and a container lid (2) with the container lower part (1) via a metal clamping ring (9) can be connected, wherein the container with removed container lid (2) has a large-area opening, which makes up at least a major part of the top surface (15) of the container, characterized in that the container bottom part (1) consists at least substantially of a conductive plastic, wherein at least the outer surface (5) of the container lower part (1) is electrically conductive, and that the container lid (2) consists at least substantially of metal, which is provided on its underside facing the container interior (3) with a plastic coating (7). Dangerous goods container according to claim 1, characterized in that the plastic coating of the underside of the container lid (2) consists of a polyethylene or polypropylene layer. Dangerous goods container according to claim 1 or claim 2, characterized in that on the underside of the container lid (2) a seal (13) is mounted, which is provided with a at the upper end of the container base (1) and surrounding the opening of the container base Auflagerand ( 17) for the container lid (2) cooperates. Dangerous goods container according to one of claims 1 to 3, characterized in that the clamping ring (9) is U-shaped in cross-section, with a connecting leg (10) from which an upper leg (11) and a lower leg (12) stand out, wherein the length (L) of the upper leg (11) is greater than the length (I) of the lower leg (12). Dangerous goods container according to one of claims 1 to 4, characterized in that the volume of the container interior (3) is at least 15 l. Dangerous goods container according to one of claims 1 to 5, characterized in that the container lower part is a plastic injection molded part. Dangerous goods container according to one of claims 1 to 6, characterized in that the container lid (2) consists of a provided on the underside with a plastic layer iron sheet or steel sheet.

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