KR100187629B1 - Stackable drum - Google Patents

Abstract

The present invention relates to a generally conical outer drum wall and to a collapsible bulk drum constituting the drum upper and lower ends. In order to enhance the weeding properties, especially the long-term lodging, the internal static pressure of the wall support is strengthened when the several drums are loaded on top of each other and the drums loaded at the bottom of the upper free gas space and the drum filling, and the static load is external The drum upper end 32 and / or drum lower end 34, which can be transferred to the plastic drum wall 30 above the barrel wall and the upper handling 38, is first elastically flexible, and the load of the load is the lower barrel wall. And on the lower handling 40.

Description

Refillable drum

1 is a known plastic drum with a drum upper end protruding for external handling.

FIG. 2 is a known plastic drum of FIG. 1 subjected to strain as a drum loaded below.

3 shows another known drum from which another upper handling ring protrudes.

4 is a known plastic drum of FIG. 3 subjected to strain as a drum loaded below.

5 is a plastic stopper barrel.

6 is a plastic drum of FIG. 5, which is strained as a drum loaded below.

7 is a drum portion embodied in the present invention in the state of increasing strain application.

FIG. 8 is the drum of FIG. 7 in the final through-lane state as a barrel loaded below.

9 is another open upper drum with a lid embodied by the present invention.

10 is an open upper drum with a lead of FIG. 9 subjected to strain as a drum loaded below.

The present invention relates to a fillable drum, and more particularly to a bulk drum of thermoplastic plastic material (for example PE polyethylene) or steel having a generally cylindrical outer drum wall and a drum top and a drum bottom. A circumferential handling ring is provided on the outer drum wall at least adjacent the top of the drum, and at least one of the disc-shaped flat drum upper or lower drum is extruded onto the drum handling ring by an annular or circular ring portion. Connected to the wall.

Plastic stopper barrels are known, for example as in German patent G87 05 916, the flat upper and lower drum ends of which are connected to the cylindrical outer drum wall by a diagonally conical or circular ring portion. With such barrels, since the circumferential handling generally has the additional function of having a hoop, they generally extend radially from the outer drum wall; Moreover, there is a relatively large axial protrusion away from the drum bottom, a considerable space between the axially outer top and the drum bottom and the drum top, and a diagonally conical ring portion protruding outwardly. The axial load on this ring part leads to the bending of the L-shaped ring radially protruding from the drum wall and the deformation of the outer drum wall, so that at least only a very limited degree is possible. Handling does not affect the lodge performance of the drum.

It is known from FR-A-2 585 330 that other plastic drums consist of upper and lower handling and ring portions protruding conically with the drum lower end and drum upper end. During this drum loading, the absorption of the impulse occurs only following the deformation of the conical, curved ring portion of the flat drum upper and lower portions due to the strengthening of the internal hydrostatic pressure: where the outer drum wall is strained in a straight axial direction. Or strain only following deformation of the handling (see FIGS. 1 and 2).

At the time of loading, the upper part of the drum loaded at the bottom, since the drum is generally transported and stacked on the pallet and these pallets consist of two or three flowboards spaced apart in parallel and do not have a uniform abutment surface at the bottom There is no constant impulse applied to.

Non-uniform straining on one side causes the lower drum to collapse easily on one side, increasing the risk of the loaded drums tipping over on one side.

Moreover, there are other bulk stopper barrels, on which handling is formed by the extension of the outer drum wall and by the tapered and flush drum tops and bottoms. With such drums, for example steel drums, the load load absorption is rigid and occurs only through a rigid outer drum wall. For this reason, if these drums are made of plastic, they have relatively thick drum walls that do not allow any axial deformation of elasticity; The internal fluid static pressure is not usually made with this drum. However, in the case of internal pressure reinforcement, the flat drum upper end and the flat drum lower end have the function of partial struts in the load load, or no action is performed on the load load and each arch freely outwards. In principle, it does not matter here whether it is empty or full or the closure is open or tight. Another drawback of this drum is that it is correspondingly heavy body weight and weight of construction material.

Therefore, it is an object of the present invention to enhance the lodging properties of bulk drums and, in particular, to save drum material and to reduce the drum body weight, while at the same time enhancing the lodgeability.

The object is that at least one of the upper end of the drum and / or the conical outwardly protruding ring portions of the lower end of the drum may be elastically deformable to a certain extent such that the load is the external handlings or the drum. A static pressure between 0.1 and 0.3 bar, preferably about 0.16 bar, can be achieved by the present invention first forming in the drum before it can be transferred from the wall to the outer plastic drum wall. With this design, when the drum is loaded on top of another drum, it is then loaded with a filling (e.g. liquid) and between 0.1 and 0.3 bar in the lower drum sealed to prevent gas leaks in the upper gas space below the drum. Internal fluid static pressure, suitably 0.16 bar, is reinforced, the drum top or / and drum bottom end protrudes outwards, and the reduced force, loaded by the impulse force, is first elastic before it is transferred to the external drum and handling. To be flexible.

Axial top of the lifting and transport ring, consisting of an upper drum ring adjacent to the drum end and / or a lower drum ring integrally connected to the outer drum wall, an axial extension of the outer drum wall, with a flat drum upper end and a drum lower end The barrel design protrudes outwardly in the axial direction against the face and the bottom face, and the ring is a conical ring-shaped outer region connected to the outer drum wall, so that once the limited internal pressure is intensified in the drum, Successfully occurs in a vertical handling ring generally axially formed in the outer drum wall, with the flange edge protruding radially outward. Here, only after a defined internal intrinsic static pressure is first created and the radial initial tension is accumulated, the load is transferred axially to the outer drum wall above the handling, and the net load impact is caused by the axial bending of the handling given a limited load. It is distributed over a wide circumferential cross section of the outer drum wall. Due to the internal pressure dispersion, the risk of drum wall deformation is delayed with greater axial load. This means that the drums can carry a greater load of load at the same time, while at the same time the risk of their flipping is significantly reduced. For example, with any assumed load on a drum loaded below 900 Kg and as a result of three drum loads, for example, 220 liter drums, it is possible to reduce the thickness of the outer drum wall and thus the drum body weight. . As a steel drum, a steel plate of 0.9 mm can be used, in contrast to the steel plate having a 1.0 mm wall thickness applied thereto. The wall thickness of the plastic drum can be reduced, for example, from 3.8 mm to 3.3 mm to 3.2 mm. This results, for example, in reducing the material weight of the drum from 9.0 Kg to 8.5 Kg and saving the synthetic raw materials.

The drum designed in the present invention exhibits suitability for a longer period of time than other known plastic drums by fixing with the addition of internal pressure. With the axial effect on the top and bottom of the drum and the support of each pallet, the outer drum wall only needs to support the reduced load.

The invention is now described by way of example with reference to the accompanying drawings.

1 shows the outer drum wall of a relatively thin walled plastic drum, the reference number 10 is generally well known, and the upper end 12 is connected to the outer drum wall 10 by a diagonally conical ring portion 14. At the transition from the ring portion 14, which is conical in the outer drum wall 10, a circumferential upper handling 16, L-shaped in cross section, is provided for lifting and transmission. The drum is filled with liquid up to the length of the upper handling 16 (drum filled), and a free upper gas space 20 remains below the drum top 12 protruding above the outer upper handling.

FIG. 2 shows the load strain of this known drum and shows the liquid 18 filled in the drum with internal pressure buildup of the free upper gas space 20 and depression of the lower end of the drum 12. In the usual case, there is no preparation for axial straining of the upper handling 16. In practice, however, this usually does not occur uniformly as long as the load strain is accelerated, the drum top is deformed, and the axial straining of the handling begins. It usually occurs partially or on one side because of the narrow pallet floor board. The top of the drum cannot absorb axial forces or transfer them to the drum wall but bends outwards, leading to an initial deflection 22 of the outer drum wall in this area, thereby increasing the risk of the drum being overturned. . Once the strain has been relaxed, this handling is no longer safe or can no longer be used.

3 is another known drum made of relatively thick plastic. The other upper handling 24 is fixed outwardly on the top of the drum by the extension of the outer drum wall 28.

As shown in FIG. 4, the axial pressure load can only be transmitted over the top surface of the handling and can be absorbed by the outer drum wall 28. With the overload strain, the elastic deformation can cause the other upper handling 24 to radially expand and the drum style to be compressed. As a result, when the internal pressure is strengthened, the drum upper part 26 (and drum lower part) is made of plastic, which is thick inner walls without external resistance (no bearing force from the loading load), so they require a large amount of material. Hollow drums are expensive because they cause heavy weight.

5 shows a closure barrel embodied in the present invention consisting of a generally cylindrical plastic drum wall 30, a drum upper end 32 and a drum lower end 34, which are relatively thin walls. A fill / empty stopper is formed in the corner region of the flat flat drum top 32. Adjacent to the plastic drum wall 30 is provided an upper handling ring 38 and a lower handling ring 40. The drum upper end 32 and the drum heads 34 are connected to the outer drum wall by the conical ring portions 42 and 44. As a result there is a circumferential free space 46 which engages with the catch of a suitable drum gripper or crane hook behind the upper handling ring 38 and the lower handling ring 40. The characteristics of the invention embodied herein are the drums of the invention, wherein the upper and / or lower ends 32, 34 have a surface 48 of the upper and lower surfaces of the upper and lower handling 38, 40, respectively. (50) is to go over.

The upper projection 52 of the drum upper end 32 above the upper handling 38 as well as the height of the lower projection 54 of the drum lower end 34 below the lower handling 40 in the figure for the drum performance of FIG. 5. The height of) is about two of the wall thickness of the plastic drum wall 30.

6 roughly illustrates the strain on the drum embodied in the present invention by a pallet 56 placed on top of the drum while applying pressure on the drum at a load of Ps. The drum end is designed to protrude at an angle and consequently is formed in a tightly sealed drum filled with a reproducible internal pressure defined to about 0.16 bar, resulting in axial strain of the plastic drum wall 30 only in response to initial radial tension. . Its advantages are axial and dashed tension and outward compression or deflection, all of which are partly self-compensating.

7 and 8 illustrate other positive effects. Once the strain begins, for example, by loading another drum on top of the drum (FIG. 7), and the drum top 32 is compressed, the elastic deformation of the upper conical lid ring portion 42 of the drum top And the radial zone direction-arrow (from the nap to the plastic drum wall 30) in the connection region 60 of the plastic drum wall 30 and the upper handling ring 38 and the upper conical ring portion of the drum upper end 42. As indicated by 58), the effect of additional stabilizing pressure is shown. For example, given the larger strain of two stacked drums (FIG. 8), a significant portion of the load load forces outwardly on the surface 48 of the upper surface of the upper handling 38 in the outward drum wall. Is sent to.

The dispersion of the internal pressure Pi and the additional stabilization of the pressure from the upper conical ring portion 42 of the drum upper end-both prevent the drum wall from deforming and collapsing inward. The redworm performance and in particular the long term redness of the drum embodied by the present invention is significantly improved. As a result of the internal pressure exerted on the drum end and their brace function on the pallet, the external drum wall only has to withstand a significantly reduced pressure load; As a result, conventional plastic barrels do not produce long-lasting reductions in stability due to material fatigue, aging, and loss of strength, even after a long time.

Another embodiment illustrating the drum performance embodied by the present invention is shown in the form of an open top drum (wide-necked drum) in FIGS. 9 and 10. Here the upper handling ring 38 is supplied to the circumference of the drum lead 62. The drum lead 62 is provided with a lower outer lid (flange) on the drum wall flange 66 protruding from the outer plastic drum wall 30. The upper edge of the plastic drum wall 30 engages a U-shaped recess in the drum lid 62, where a sealing ring 68 is provided, the outer lid rim 64 and the drum wall. Using the sealing ring 70 which overlaps the flange 66 at the same time, the drum lead 62 is sealed in advance so that gas and liquid do not leak to the drum opening and the outer drum wall.

When no load is applied (FIG. 9), the surface of the drum lead 62 is about three times the wall thickness of the lid and the outer drum wall on the upper surface 48 of the upper handling ring 38. Is at the height of. When a load is applied (Fig. 10), the drum lead 62 is enclosed inward within the height of the upper protrusion, so that the internal pressure P ₁ is strengthened in the drum and the axial compression command is applied to the external lead. 64 and over the drum wall flange 66 can be transferred from the upper hinged ring 38 to the axial plastic drum wall 30. In the confined deformation region 72 adjacent to the uniform lead region, the upper conical ring portion 42 of the upper end is formed by a plurality of circumferential, annular, accordion shaped grooves on the outer and inner surfaces of the conical ring portion 42, for example. It constitutes a confined strain region, which enhances the resilience and flexibility of the drum lead. Here the external drum wall is strengthened due to excessive internal pressure; This open top drum thus shows a better configuration and improved long-term redness in certain configurations.

As a result of the large diameter of the contact area for installing the pallet (same as the diameter of the upper handling 38), the compressive force is well distributed to the plastic drum wall; The overall deformation is also less and their lateral stability is greater.

Departing from the present invention, for example, the handling can be made by separating the ring portion so that it can slide, shrink, fix and / or weld on the outer drum wall.

Moreover, the drum embodied in the present invention can be produced as an intermediate barrel, where the entire drum top and / or drum bottom is prefabricated with each handling in a separate development part (for example by spray molding). It is then bonded with the cylindrical outer drum wall.

Effervescent properties, in particular, longer durations of at least one circumferential handling adjacent to the appropriate drum end on the outer drum wall and at least one drum end protruding over the drum handling in the axial direction, are functionally free. When the drum is filled and loaded in a sealed drum that does not count gas in the gas space, the internal fluid static pressure is increased between 0.1 and 0.3 bar, preferably about 0.16 bar, and the drum top or / and bottom is externally charged with sperm load. Before being transferred vertically over the drum wall and the handling to the plastic drum wall, they are flexible with their resilience first, giving better locus properties, especially long-term locomotority. Partly limited load is applied on the circumferential handling formed by the axial extension of the drum wall, so that the resulting load load is distributed in a timely manner.

Claims (9)

It consists of a substantially cylindrical drum wall (30) and a drum upper end and drum lower end (32, 34), the circumferential handling (38) is installed on the upper drum wall (30) adjacent at least the drum upper end (32) At least one of the disc-shaped drum ends 32, 34 is coupled to the drum wall via a ring portion of a substantially conical or curved cross section that projects outwardly outwardly, and the upper handlings 38,40. The heights of the projections 52 and 54 of the at least one drum ends 32 and 34 as a shape of 1 are the wall thickness of the plastic drum wall 30 and the drum upper end and the drum lower end 32 and 34. For up to 5 times the replenishable bulk drum, At least one of the ring portions 42 and 44 protruding into the conical outer axis of the drum upper end 32 and / or the drum lower end 34 during the loading load of the drum is deformable to a certain extent so that the loading load is increased. A static pressure between 0.1 and 0.3 bar, preferably about 0.16 bar, may be applied before it can be transferred from the outer handlings 38, 40 or the drum wall to the outer plastic drum wall 30. A collapsible bulk drum, characterized in that it can be formed first. The elastically deformable ring portion (42) is provided only at the drum upper end portion (32) and the handling is installed as an extension of the plastic drum wall (30) that is substantially cylindrical. 34) A collapsible bulk drum, which is constructed in the same form as the lower handling ring or which extends almost directly into the plastic sieve wall (30). 3. The height of the protrusions (52) of the drum upper end (32) above the upper handling ring (38) is the wall thickness of the plastic drum wall (30) or the drum upper end (32). Applicable bulk drum, characterized in that up to about 3 to 4 times. The height of the protrusion 52 of the drum upper end 32 above the upper handling ring 38 is about three times the thickness of the plastic drum wall 30, and the lower handling ring. The height of said protrusion of said drum lower end (34) above (40) is about one to two times the thickness of said plastic drum wall (30). 3. The substantially conical shape according to claim 1 or 2, which determines the height of the protrusions (52, 54) of the upper and lower ends (32, 34) above the upper and lower handling (38, 40). Fillable bulk drum, characterized in that the ring portions (42, 44) are in the form of an elastically deformable deformation zone, for example an annular groove. 3. The flanged handle (74) according to claim 1 or 2, wherein the upper handling ring (38) is formed from a ring portion (75) in which the plastic drum wall (30) extends in an axial direction and is radially outwardly flanged. And a free space 46 of wedge-shaped cross section, the inner surface of the ring portion 75 of the upper handling ring 38 and the conical ring portions 42 and 44 of the drum ends 32 and 34. Fillable bulk drum, characterized in that formed between). 2. The fillable bulk drum according to claim 1, wherein the upper edge of the fill / empty stopper (36) is formed or slightly locked to the same height or shape as the outer surface of the drum upper end (32). At least one circumferential handling is arranged adjacent to the appropriate drum end on the outer drum wall such that at least one drum end extends axially outwardly on the drum handling, in particular the long term stackability. In a method of increasing loyalty, in a drum that is gastightly sealed with remaining residual gas space 76 and drum fill and liquid 18, the outer drum wall and upper handling 38 pass through the plastic drum. Before the vertical transfer of the load load to the wall 30 is effected, the drum upper end 32 and / or drum lower end 34 are elastically deformable so that an internal fluid of 0.1 to 0.3 bar, preferably about 0.16 bar A method in which a static pressure is formed first, thereby achieving locus, in particular for a long time. The load load generated by the local load on the circumferential handlings 38, 40 axially formed by the extension of the plastic drum wall 30 is the relative load of the plastic drum wall 30. Method, characterized in that it is distributed over a large circumference.