DE102014010273A1 - Earthing flexible bulk material container - Google Patents

Abstract

The application relates to a groundable flexible bulk material container comprising a container 1 made of a flexible material, which has a conductive or conductive grid of conductive threads 5, alternatively full-surface conductive or conductive and at least one carrying strap 2 connected to the container 1 by means of support seam 3, characterized in that at least one carrying loop 2 is provided at least from the supporting seam 3 to the suspension point 4 over its entire surface, with a conductive or conductive material in a surface resistance range measured in accordance with TRBS 2153 of 0.1 to 108 ohms.

Description

The application relates to a groundable flexible bulk goods container.

Earthing flexible bulk goods container, type F FIBC i. d. R. used to prevent electrostatic ignition hazards in potentially explosive atmospheres or with highly ignitable flammable dusts.

Commercially available FIBC type C are sewn together container with loops of a flexible material, in which the carrying loop allow the recording and transport of the container from above (such as on 1 shown). They are usually made of polypropylene fabric, which is equipped with a conductive or conductive grid of conductive threads. The interconnection of the conductive filaments requires proper stitching of the fabric so that the conductive filaments of all FIBC component parts have good and sufficient contact with each other and with the grounding point TRBS 2153 Appendix B and DIN IEC 61340-04-04 ,

In practice, this connection is not always guaranteed at all points. Especially in the field of straps, which today i. d. R. are made of insulating PP fabric with 3 to 8 exclusively arranged in parallel, conductive threads, it often causes problems, since not always have all the conductive threads sufficient contact with the grounding point - z. B. the threads can be destroyed by sewing the straps, or they have - as they rest loosely on the PP fabric of the FIBC jacket - no reasonable contact with earth on. On the other hand, z. B. by twisting the carrying loops is not always a sufficient contact of the threads to the receiving tool -. As lifting cross, which often serves as a grounding point to be ensured.

The grounding of FIBC Type C is a safety measure from the viewpoint of avoiding electrostatic ignition hazards, which must meet high requirements and can lead to accidents due to manufacturing defects or operating errors ( LG Britton, Process Safety Progress ", Vol. October 4, 1993, 240-250 ).

FIBCs are therefore additionally equipped with one or more earthing straps whose location is not specific. Nevertheless, insufficiently grounded conductive threads u. U. lead to electrostatic ignition hazards. An FIBC that is not grounded will result in high spark discharge electrostatic discharges.

It was therefore an object to invent a groundable flexible bulk material container, the grounding is much easier and improved, with no isolated conductive threads in the carrying straps can occur more.

The object has been achieved in that at least one strap 2 of the bulk goods container at least from the carrying seam 3 to the suspension point 4 Full surface, measured with a dissipative or conductive material in a surface resistance range according to TRBS 2153 from 0.1 to 10 ⁸ ohms.

• – ein Behälter 1 aus einem flexiblen Material, welches ein ableitfähiges oder leitfähiges Raster aus leitfähigen Fäden 5 aufweist, alternativ vollflächig ableitfähig oder leitfähig ist, und
• – mindestens eine Trageschlaufe 2 verbunden mit dem Behälter 1 mittels Tragenaht 3,

dadurch gekennzeichnet, dass mindestens eine Trageschlaufe 2 mindestens von der Tragenaht 3 bis zum Aufhängepunkt 4 vollflächig, mit einem ableitfähigen oder leitfähigen Material in einem Oberflächenwiderstandbereich gemessen gemäß TRBS 2153 von 0,1 bis 10⁸ Ohm ausgerüstet ist.The subject of the application is therefore an earthable flexible bulk material container comprising:

• - a container 1 of a flexible material comprising a conductive or conductive grid of conductive filaments 5 has, alternatively, all-over dissipative or conductive, and
• - At least one strap 2 connected to the container 1 by means of wearing seam 3 .

characterized in that at least one carrying loop 2 at least from the wear seam 3 to the suspension point 4 Full surface, measured with a dissipative or conductive material in a surface resistance range according to TRBS 2153 from 0.1 to 10 ⁸ ohms.

Full-surface equipment in the sense of the invention means an areal continuous conductive or conductive equipment of the carrying loop as opposed to a conductive equipment with parallel conductive threads. For the purposes of the invention, therefore, straps are not exclusively equipped with conductive threads, with a combination of conductive threads and full-surface equipment is possible.

The inventive full-surface equipment at least one of the carrying straps these can be regarded as intrinsically safe grounding points and the grounding can then simply on the one hand on the receiving tool, -. As the conductive and grounded metallic lifting cross or the metal runners of a truck (basically grounded in the Ex area) - be ensured. On the other hand, a grounding clamp can be securely attached to the carrying straps and it no longer comes to the fact that the FIBC is considered to be unsuitable for incoming goods inspections only because of insufficiently grounded conductive threads.

The material, usually polypropylene, which is necessary for the load-bearing strength of the loops, usually remains as before. This conductive equipment may, for. B. by sheathing with conductive foil or by conductive coating of the carrying straps or the like.

For reasons of flexibility / extensibility of the straps, it is sufficient to apply the conductive equipment to 60% to 100% of the surface of a strap, provided that the grounding between the strap and the suspension point of the strap is ensured, i. H. the equipment begins on one side of the carrying loop at the wearing seam.

Preferably, all straps are fully conductive equipped.

If ground straps in the floor area are desired, an extension of at least one carrying loop can easily be carried out as a grounding lug in the floor area. On the additional stitching of other earthable points, such. B. earthing straps, can then be dispensed with.

The carrying loops can then be assigned in the earthing reference as clearly marked earthable points; In addition, if desired, a grounding symbol could be printed on the conductively equipped carrying loops.

1 : Type C FIBC according to the prior art, wherein:

LIST OF REFERENCE NUMBERS

1

container

2

wrist strap

3

carrying seam

4

suspension

5

Ableitfähiges or conductive grid of conductive threads

6

grounding tabs

7

ground wire

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• TRBS 2153 Appendix B [0003]
• DIN IEC 61340-04-04 [0003]
• LG Britton, Process Safety Progress ", Vol. 4 October (1993), 240-250 [0005]
• TRBS 2153 [0008]
• TRBS 2153 [0009]

Claims (3)

Earthing flexible bulk material container comprising: - a container 1 of a flexible material comprising a conductive or conductive grid of conductive filaments 5 has, alternatively, a full surface conductive or conductive, and - at least one strap 2 connected to the container 1 by means of wearing seam 3 , characterized in that at least one carrying loop 2 at least from the wear seam 3 to the suspension point 4 over the entire surface, equipped with a dissipative or conductive material in a surface resistance range measured in accordance with TRBS 2153 from 0.1 to 10 ⁸ ohms. Groundable flexible bulk material container, with all carrying loops being fully conductive. Groundable flexible bulk material container, wherein at least one carrying loop is designed as a grounding lug in the bottom area.

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