CN1025309C - Stackable drum or barrel - Google Patents

Abstract

The invention concerns a large-capacity stackable drum with a substantially cylindrical side wall (3) and top and bottom ends (32, 34). To improve the stackability in particular the long-term stackability an internal hydrostatic pressure which supports the side wall is initially produced, when stacking several drums one on top of the other, in the gas space above the content and in the contents, of the drums stacked underneath, by virtue of the elastic flexibility of the top (32) and/or the bottom (34) of the drum, until a reduced stacking load acting through the top rim or grip ring (38) of the drum into the drumwall (30) is produced or support provided through the bottom rim or grip ring (40).

Description

Stackable drum or barrel

The present invention relates to a kind of stackable bucket, the high capacity bucket that this bucket is preferably made by thermoplastic synthetic material (for example PE polyethylene) or steel, it has is columniform bucket outer wall and bucket top and bucket bottom basically.The handling ring of an annular is set on the contiguous bucket top of said bucket outer wall at least; At least at the end one of disc flat bucket top or flat bucket gives prominence to the annular element that on the handling ring of bucket its cross section is circular cone or arch by one and links to each other with the bucket outer wall.

Known general vinyl cover bucket, described in German utility model patent G8705916, its upper and lower flat bucket end all is to link to each other with the column barrel outer wall by the annular element that is oblique cone or rounding.Generally, the annular handling ring of this bucket has the additional function of rolling ring, and they are radially-protruding from the bucket outer wall substantially; In addition, at the bottom of bucket, there is bigger axial overhang to make barrel top outside vertically, between bucket bottom and the bucket top and between the oblique cone annular element of those handling rings of outwards giving prominence to sizable interval arranged like this.Axial load power on these annular elements no matter all can only reach very limited degree in that, is given birth to bending because these loading forces can make from the radially outstanding L shaped environment-development of bucket wall, and makes a barrel outer wall distortion.Handling ring is to the then not influence of stacking ability of this bucket.

When stacking this bucket, the absorption of stacking power has only and just takes place after making the taper of flat bucket top and bucket bottom or arc annular strain by static pressure in producing, and axial deformation does not take place a barrel outer wall immediately; Only after the handling ring distortion, just take place (seeing Fig. 1 and 2).

On pallet, transport and stack because these barrels generally are framves, these pallets have the base plate of two or three spaced and parallel, at the seating plane that its downside does not flush again, on the bucket top of stacking at the bottom of therefore when stacking, not having constant stacking masterpiece to be used in bucket.

Unidirectional like this or fitfull stress just makes following bucket cave in a side easily, thereby has increased the danger that the bucket stacked falls to a rollover.

In addition, also have another kind of high capacity bucket with cover, handling ring is to be provided with by extending axially of bucket outer wall on this bucket, and makes barrel top and bucket bottom form the structure of shrinking sinking.This bucket, for example common steel drum, the absorption of stacking load has only by hard unbending bucket outer wall and just occurs, and therefore, these buckets are if be made of plastics, and they just need have thicker does not allow or barrel outer wall that the elasticity axial deformation is given birth in difficult labour completely.In a single day common this bucket does not produce interior static pressure, yet has produced internal pressure, the bucket bottom of flat bucket top peace will freely outwards be arch respectively, can not have the function that load is stacked in partly supporting, does not also keep out the function of stacking load.Particularly, this situation and at that time bucket be empty or full and bung be opening or leak free all have no relations.Bringing another shortcoming for thus this bucket is that its tare weight and the weight of manufactured materials is all quite big.

Thereby the objective of the invention is to improve the stacking function of high capacity bucket, and stack function especially for a long time, make its can saving in material and reduce the tare weight of bucket simultaneously.

This function by the measure that the present invention realizes is, at least from a bucket top or the bottom outwards outstanding, its length of last overhang that surpasses corresponding handling ring is 1 to 5 times of barrel outer wall thickness approximately.

When being put into another bucket under being positioned at when pushing up an enterprising windrow and putting (for example liquid) of material and leak free bucket are housed, the solution of the present invention can be in the top clearance envelope below the bucket top or produce in the bucket of charging between 0.1 to 0.3 crust, the interior static pressure about 0.16 crust preferably, this pressure is also can reappearing of can limiting, and can be before the stacking load that reduces passes to barrel outer wall and handling ring, outwards outstanding bucket top is or/and the elasticity creep takes place earlier in the bucket bottom.

Because bucket design plan of the present invention is, have at contiguous bucket end place integrally link to each other with the bucket outer wall, a barrel outer wall extends axially that bucket encircles or/and following barrel of ring on the part basically, flat bucket top outwards outstanding vertically towards the axial upper and lower surface that promotes the transportation ring and bucket bottom are arranged, and above-mentioned ring just links to each other with outer barrel wall by the conical ring perimeter region.Under the internal pressure situation that generation limits significantly in the bucket, be that barrel outer wall extends axially partly upward that form and edge flange is will successfully carry out on the upright handling ring of radially outward giving prominence to stacking the absorption of load basically only.Here, the interior static pressure of qualification produces earlier, after this cumulative path to initial tension, load is delivered on barrel outer wall vertically through handling ring.By axial connection, make and stack load and be assigned on the broad circumferential section of barrel outer wall the handling ring that provides local finite load.Because internal pressure in the highest flight, up to forming a bigger axial load, so the danger of bucket wall distortion is suppressed, this means that this bucket can stand sizable stacking load, their rollover risk greatly reduces simultaneously, therefore, for example estimating that the given load that is roughly 900 kilograms is added to one is deposited on the following bucket, for example 220 liters bucket is done triple stackings, then can reduce the thickness of barrel outer wall, and then correspondingly reduce the tare weight of bucket.For steel drum, for example can use 0.9 millimeter steel plate, in contrast to this, former then is steel plate with 1.0 millimeters wall thickness.For example the wall thickness of Plastic Drum can be reduced to 3.3 millimeters to 3.2 millimeters from 3.8 millimeters.This material that will help causing empty bucket is heavily reduced to 8.5 kilograms and save synthesis material from 9.0 kilograms.

By design-calculated bucket of the present invention, owing to utilized additional stable internal pressure, compare with other known Plastic Drums and to demonstrate goodish long-term stacking performance, owing to have the axial force that is added on barrel T﹠B end and to the supporting functions of corresponding pallet, so as long as the bucket outer wall bears the stacking load of minimizing.

Now, with reference to accompanying drawing, the present invention is described, wherein by embodiment

Fig. 1 is a known Plastic Drum, and it has just in time outstanding bucket top above the handling ring outside;

Fig. 2 represents this known plastic bucket shown in Figure 1 suffered stress when being deposited in following bucket;

Fig. 3 is another known bucket, and it has the handling ring of just in time giving prominence on the bucket top;

Fig. 4 represents the known bucket of shown in Figure 3 this suffered stress when being deposited in following barrel;

Fig. 5 is the Plastic Drum of a band bung of the present invention;

Fig. 6 represents Plastic Drum shown in Figure 5 suffered stress when being deposited in following bucket;

Fig. 7 is as the bucket of embodiments of the invention, and one is in the cross section that increases state of stress;

Fig. 8 represents bucket shown in Figure 7 is in final strain regime when being deposited in following barrel;

Fig. 9 is another the open-topped bucket with cover as the embodiment of the invention;

Figure 10 is open-topped bucket with cover shown in Figure 9 suffered stress when being deposited in following barrel.

Fig. 1 represents the Plastic Drum outer wall that a well-known wall is thin with piece number 10, and top 12 links to each other with bucket outer wall 10 by oblique cone annular element 14.The part that carries out the transition to barrel outer wall 10 from conical ring spare 14 is provided with one as the L-shaped annular upper portion handling ring 16 in its cross section that promotes and transport.This bucket is injected liquid (casting resin) to the height that approximately is top handling ring 16 places.Below bucket top 12, just in time exceed above-mentioned handling ring place, have top clearance envelope 20.

Fig. 2 represents the bucket bearing strain situation that this is known, and explanation is because the liquid 18 that is marked with in the feasible bucket of bucket top 12 downward depressions produces internal pressure for 20 li at the top clearance envelope.Do not prevent the measure of top handling ring 16 axial deformations under normal conditions, as long as bearing stress progressively rises, and barrel top is produced when being out of shape, this handling ring just begins axial deformation.In fact this distortion is not to take place equably, for example because the cause of narrow platen base plate, take place roughly local or unilaterally,, or they are delivered on barrel wall so the bucket top can not absorb axial force, make it down to curve outwardly, make the bucket outer wall in this zone form distortion 22 earlier, thereby make the bucket of being stacked that the bigger danger of caving in be arranged, in case this distortion alleviates, this handling ring is insecure, and it can not be used further to stack.

Fig. 3 is that another is well-known by the Plastic Drum of making than heavy wall, and top handling ring 24 just in time is arranged on above the bucket top of barrel outer wall 28 extendible portions.As can be seen from Figure 4, the carrying axle pressure can only be passed through the upper surface of handling ring and be transmitted, and is absorbed by bucket outer wall 28.When the carrying stress glut the time, elastic deformation energy radially expands outwardly top handling ring 24 and staving is compressed.The result, when internal pressure produces, bucket top 26(and bucket bottom) do not having not support the power of stacking load under the extraneous resistance situation), can become outstanding outwardly, this Plastic Drum by the heavy wall manufacturing needs wide variety of materials owing to them, thereby be expensive, and cause heavier empty bucket weight.

Fig. 5 represents the Plastic Drum as the band bung of the embodiment of the invention, it has thin cylindrical substantially Plastic Drum wall 30, bucket top 32 and bucket bottom 34, filling/discharging bung constitutes the knuckle district on above-mentioned smooth bucket top 32, and contiguous Plastic Drum wall 30 positions are provided with a top handling ring 38 and a bottom handling ring 40.Bucket top 32 links to each other with the bucket outer wall by conical ring spare 42,44 with bucket bottom 34, thereby in the inboard of top handling ring 38 and bottom handling ring 40, the clearance envelope 46 of an annular is arranged all, is used for meshing the clamp of corresponding drum clip unit or jacking equipment suspension hook.The principal character of this embodiment of the present invention is that the top and/or the bottom 32,34 of bucket exceed upper and lower surperficial 48,50 of upper and lower part handling ring 38,40 respectively.By the bucket shown in Fig. 5 as seen, bucket top 32 surmount 52 on top handling ring 38, and bucket bottom 34 overhang 54 below bottom handling ring 40 all is the twice of Plastic Drum 30 wall thickness approximately.

Fig. 6 roughly represents platen 56 is placed on the bucket top of the embodiment of the invention, by stacking load p s pressure is added on the bucket, thereby forms stress on bucket.Bucket end is designed to be convenient to estimate that stress reaches to a certain degree, thereby in a topping up and internal pressure that tightly produce about 0.16 crust in the leak free bucket.Like this, only after initial radially tensioning, the axial strain of Plastic Drum wall 30 just then forms.The advantage of this bucket is overlapping axial and tangential stress and axle pressure or stacking power, and all these power are all partly from compensating mutually.

Fig. 7 and Fig. 8 illustrate the effect that another is positive, and the strain (see figure 7) Once you begin takes place, for example another piled barrels is placed on the top of this barrel, and bucket top 32 pressurizeds, then the upper taper bezel ring, spare 42 on bucket top just begins elastic deformation.In addition, radially generation effect of pressure stable-by shown in the arrow 58-bonding pad between the upper taper bezel ring, spare 42 on Plastic Drum wall 30 and top handling ring 38 and bucket top in, form application force from the lining to Plastic Drum wall 30.Under the bigger situation of strain, (see figure 8) when for example stacking two buckets, most of loading power of stacking is delivered on barrel outer wall 30 through the upper surface 48 of top handling ring 38 vertically.

Because internal pressure P1 preponderates, and additionally produce the pressure of stabilization again from the upper taper bezel ring, spare 42 on bucket top, both are to the distortion that is delivered to the internal drum wall and subside and all have the opposite effect, therefore can make the stacking performance of the bucket of the embodiment of the invention, particularly stack performance for a long time and just improved greatly.Because internal pressure acts on barrel end and they supporting role to platen, so as long as the bucket outer wall bears the pressure load that greatly reduces.Therefore, just can not take place as the reduction of the fatigue of material on the common Plastic Drum, long-term inherent stability aging and that cause because of loss of strength, or just take place long after.

Can see another embodiments of the invention from Fig. 9 and the sort of open top shown in Figure 10 and the bucket (wide mouth drum) that has a lid, wherein, top handling ring 38 is arranged on the periphery of bung 62, and bung 62 is bearing in from the outstanding bucket wall flange 66 of Plastic Drum outer wall 30 by its bottom outer edge (flange).The upper limb of Plastic Drum wall 30 is engaged in the U-shaped groove of bung 62, wherein be provided with seal ring 68, make outer edge 64 and bucket wall flange 66 overlapping by closed-loop 70 simultaneously, these can be to bung 62 prestress, and can sealing gland and fluid-tight ground be securely sealed on barrel opening and barrel outer wall.

(see figure 9) when not carrying, the surface of bung 62 by approximately be the thick three times top overhang 52 of tegmental wall and on the upper surface 48 of top handling ring 38 the bucket outer wall constitute.(see figure 10) when carrying, bung 62 is pressed onto on the position of above-mentioned top overhang inwards.Like this, just produced internal pressure Pi in bucket, axial compressive force then can be delivered on the Plastic Drum wall 30 through outer edge 64 and bucket wall flange 66 vertically from top handling ring 38.72 li of the deforming zones that limits near the bung place that flushes, the upper taper bezel ring, spare 42 on bucket top has one for example to limit deforming zone 72 by what the groove of the outside face of conical lid ring 42 and a plurality of circles, annular and pleated on the inside face constituted, and it has improved the elasticity and the creep ability of this district's inner barrelhead.Because internal over pressure has also been done reinforcement to the outer wall of bucket, because its special structure design, the bucket of this top end opening also demonstrates stacks performance preferably, simultaneously, has improved long-term stacking performance again.

Because put the cause of the contact zone diameter big (diameter that is equivalent to top handling ring 38) of platen, compressive force just is distributed on the Plastic Drum wall preferably, always just less in distortion, their lateral stability is just bigger.

Also associate other structure from the present invention, for example can handling ring make respectively with sliding join, hot charging, gluing or/and be welded on annular element on barrel outer wall.

In addition, can make bucket with cover to the bucket of the embodiment of the invention, wherein, whole bucket top and/or bucket bottom are to make independent member (for example using the injection of plastic mould) respectively in advance with corresponding handling ring, and be bonding with columniform bucket outer wall then.

Contiguous corresponding bucket top end has the handling ring of a circle at least on the bucket outer wall, and at least one barrel end vertically outwardly direction exceed its more superior stacking performance of high capacity bucket of handling ring of bucket, particularly stacking performance preferably for a long time can reach effectively by above-mentioned mode, when promptly stacking, be placed on the inside static pressure power that produces in the liquid of its residue clearance envelope and Qi Nei in the following hermetic closed bucket between 0.1 to 0.3 crust, preferably about 0.16 crust, stacking before load vertically is delivered to the Plastic Drum wall through bucket outer wall and handling ring, the bucket top is or/and bucket at first elasticity creep of bottom, therefore have and stack performance preferably, particularly stack performance for a long time.Suffered stacking load is advantageously distributed, and has only the load of some given local finite to be added in a barrel wall and extends axially on the formed circular handling ring of part.

Claims (9)

1, the stackable bucket of a kind of high capacity, it comprises that one is columniform bucket wall and bucket top and bucket bottom basically, at least contiguous bucket top end has an annular handling ring on the bucket outer wall, have at least one to link to each other with the bucket wall in the disc bucket end outwardly by the outstanding vertically annular element of tapered or arc section almost, it is characterized in that, at least one bucket end surpasses top handling ring (38,40) last overhang (52,54) height is Plastic Drum wall and bucket top and bucket bottom (32,34) about 1 to 5 times of thickness, has a bucket top (32) at least or/and the outstanding annular element (42 of the taper of bucket bottom (34) outwardly, 44) flexibly stacked load and be out of shape, like this, go into load through outer handling ring (38 at heap, 40) and a bucket wall be delivered to Plastic Drum outer wall (30) before, in bucket, produce earlier the static pressure that supporting role is arranged.

2, bucket as claimed in claim 1, it is characterized in that, the annular element (42) of an energy elastic deformation only is set in bucket top (32), and a top handling ring (38) is set on the extension component that is columniform Plastic Drum wall (30) basically, bucket bottom (34) is basically directly near Plastic Drum wall (30), or being provided with a bottom handling ring (40), this ring flushes with bucket bottom (34), promptly fences up at the bottom of equal height bundle of planes bucket.

3, bucket as claimed in claim 1 or 2 is characterized in that, bucket top (32) surpasses top handling ring (38) one segment distances, and its overhang (52) approximately is a barrel wall (30) or bucket top (32) wall thickness 3 to 4 times.

4, bucket as claimed in claim 1, it is characterized in that, the top overhang (52) of bucket top (32) on top handling ring (38) approximately is 3 times of Plastic Drum wall thickness, and the bottom overhang of bucket bottom (34) below bottom handling ring (40) approximately is 1 to 2 times of Plastic Drum wall (30) thickness.

5, as claim 1,2 or 4 described buckets, it is characterized in that, the almost tapered annular element (42,44) of determining top and bottom (32,34) the upper and lower overhang (52,54) below the handling ring on the handling ring of top and in down constitute can elastic deformation deforming zone, for example on the outside face of bevelled annular element (42) and inside face, circular, annular, pleated groove are arranged.

6, as claim 1,2 or 4 described buckets, it is characterized in that, top handling ring (38) is to be made of the annular element of directly stretching vertically basically (75) on the extendible portion of Plastic Drum wall (30), the edge radial outward of flange (74), the clearance envelope of wedge shape section are arranged on the inside face and the bucket of the annular element (75) of top handling ring (38) and hold between taper annular element (42, the 44) inside face of (32,34).

7, bucket as claimed in claim 1 is characterized in that, the upper limb of fillings/discharging bung (36) is arranged to the same with barrel outside face on top (32) high and flush or a little downwards.

8, improve the stacking performance of high capacity bucket, particularly stack the stacking method of performance for a long time, at least one annular handling ring is the corresponding bucket end place at contiguous bucket outer wall, at least one barrel end is crossed the handling ring of bucket vertically outwardly, it is characterized in that, when piled barrels is placed on each other the top

-be deposited in produce between 0.1 to 0.3 crust in the bucket of its remaining space (76) and full of liquid in the following hermetic closed bucket and the liquid (18), 0.16 interior static pressure about clinging to preferably, before this, bucket top 32 is or/and the bucket at first flexible creep in bottom 34;

-vertical stacking load can be delivered on the Plastic Drum wall (30) by bucket outer wall and top handling ring (38), stacked performance thus preferably, the long-term stacking performance that particularly has been improved.

9, stacking method as claimed in claim 8, it is characterized in that, on the annular handling ring (38,40) that forms vertically on the extendible portion of Plastic Drum wall (30), only add the load of local finite, through the stacking load distribution of reduction on the big circumference of Plastic Drum wall (30).

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