EP0921984B1 - Barrel with a lid and clamping ring closure - Google Patents

Description

The invention relates to a lid barrel for storage and transport in particular dangerous particulate, pasty or liquid contents, with a cylindrical or conical lid barrel body, with an upper rotationally asymmetrical Barrel lid and a U-shaped clamping ring closure in the area of the upper barrel opening engages under a flange edge formed on the outer barrel wall and engages over the outer U-shaped edge of the barrel lid and in the closed state fixed gas and liquid tight on the barrel opening, with the barrel lid between flat cover plate and outer cover edge a circumferential groove (e.g. engaging groove for drum gripper tools) and with at least one laterally arranged deeper bung (= bung housing) with possibly arranged in it gas- and liquid-tight closable bunghole opening. On Such a lid barrel is previously known from the publication WO-A-9 608 416.

Problem : The invention is based on the knowledge that in the case of such a non-rotationally symmetrical barrel cover, in which at least one bung hole is provided in the edge area with a bunghole opening optionally arranged therein (e.g. a 2 "fill / drain bung opening on one side or / and in the opposite edge area e.g. a 3/4 "ventilation bung), the adjacent areas around the bung or the transition areas from normal drum lid topsoil into the bung are most critical in the event of loads falling on the barrel, ie most prone to breakage Most likely to overuse material with cracking or leakage. The same also applies to drum lids, in which the bung trough (s) are provided, but no bunghole connection is designed with a bunghole opening.

In extreme stress cases such as B. in the internal pressure test, in the diagonal or Coat drop test (on the side wall) one using a tension ring on a corresponding one Cover barrel held barrel cover this leads to local overuse in the areas that are buckled the most or where the greatest tensile stresses are occur, which is also overlaid by considerable bending stresses become that there the edge of the lid first from the upper leg of the Pulls out the clamping ring and leaves the lid barrel leaking. Especially at Barrel covers made of thermoplastic (hard plastic) are important these places often before that the barrel lid fixed on the edge of the barrel body remains, but breaks itself and tears open. The areas of the drum lid in which the sheet pits arranged laterally and recessed (if necessary with upright Bung) are usually relatively stiffer and less elastic than normal drum lid edge areas, in which there are no sheet pits are provided. A very important reason for the occurrence of breakage and cracking according to the knowledge of the present invention in that with such rotationally asymmetrical barrel lids different stretch lengths or surface lengths are available. The stretch lengths are leveled horizontally from the center of the lid to the top Front edge of the outer, downwardly open, U-shaped edge of the drum lid measured. The areas of the lower sheet pits show the comparatively shorter stretch lengths. This is particularly the case with drum lids with a second circumferential lid bead, which is interrupted by the sheet pile housing is the case. Due to shorter stretch lengths in the sheet pile area this area even with excessive internal pressure, such as. B. the internal pressure test, higher Exposed to loads (ovalized) and can leak. The barrel lids as well the lid barrel body can consist of plastic and / or metal (sheet steel).

It is an object of the present invention to eliminate these disadvantages of the prior art and to improve the tightness of a lid barrel which is particularly suitable or approved for dangerous liquid contents in extreme load cases. For this purpose, in the area around the sheet pits of the drum lid, there should be a relief in the event of overstress.

This object is achieved, according to the invention, between the lower one Sheet pits and the upper front edge of the outer, downward, U-shaped Appropriate measures are provided and designed at the edge of the drum cover, after which the radial expansion lengths (= surface lengths) - measured from the center of the lid up to the upper front edge of the U-shaped lid edge - this barrel lid area or barrel cover segment with the sheet pits (s) compared to the neighboring barrel lid areas or barrel lid segments outside of Sheet pans are extended so that the barrel cover in the areas with the bung (es) in the radial direction from the center of the cover to the front edge of the outer edge of the cover measured at least the same length of elongation or the same length Has surface lengths. This advantageously achieves that in this hitherto critical drum cover area around the bung, none of the otherwise usual excessive voltage peaks occur more. The barrel lid areas in in the immediate vicinity or in the transition area from the lower sheet pile the neighboring barrel lid areas are no longer a preferred place for that Occurrence of leaks or cracking.

In an embodiment of the invention it is provided that the bottom of the groove circumferential engagement groove has a different depth in the circumferential direction, the bottom of the groove in the area (s) in front of the sheet piling (s) has a greater depth than in the circumferential areas outside the sheet piling, whereby according to the invention in all areas of the drum lid everywhere exactly same elongation lengths or radial surface lengths of the cover are given. This measure enables a targeted compensation of unequal stretch lengths the lid areas with the sheet pits can be adjusted or carried out. At Now the cover areas with the sheet pits do not become the same stretch lengths more loaded than the other lid areas or significantly less loaded than without this measure, and there is no longer a preferred pulling out of the Lid edge in the area of the sheet pits from the clamping ring or even to one Breaking or tearing open the barrel lid even in the otherwise critical lid areas around the bung. In another preferred embodiment of the Invention is provided that the barrel lid in the areas around or in front of Bung trough (s) measured in the radial direction larger elongation lengths or larger Surface lengths than in the areas outside the sheet pits (n). This allows the voltage peaks in the relatively stiff area around the Sheet piling (s) can be further reduced noticeably, and a concentration of Voltage peaks now occur in the comparatively uncritical lid areas outside of the sheet pits or offset by 90 °.

In a further embodiment of the invention it is provided that the transition from normal, uniform depth of the circumferential groove base outside the areas in front of the bung trough (s) to the greater depth of the groove base directly in front of the or the sheet skip (s) over a flat transition bevel Connection piece takes place, which extends in the circumferential direction over a length of about 20 mm to 80 mm, preferably about 60 mm, extends. The transition from greater depth the bottom of the groove directly in front of the bung (s) to the normal or smallest depth of the groove base in the 90 ° to the bung (s) offset cover segment areas can also be stepless, preferably swung evenly and gently. In any case, it is useful if the groove base with the greater depth extends approximately as far in the circumferential direction, how the bottom of the respective sheet piling (= sheet piling) is wide.

The difference in depth of the bottom of the groove with greater depth to the bottom of the groove normal depth should have a larger lid barrel with a capacity of about 220 l (= 55 US gal.) and with a barrel lid diameter of about 560 mm about between 5 mm and 15 mm, preferably about 7 mm. With a smaller one Lid barrel with a capacity of about 120 l (= 36 US gal.) And with a Cover diameter of approx. 460 mm should also account for the difference in depth of the groove base greater depth to the groove base with normal depth between about 2 mm and 12 mm preferably about 6 mm. The stretch length is then un in this area doubled the depth difference.

According to a further preferred embodiment of the invention, the barrel cover a second circumferential or partially circumferential one in the outer edge region of the flat cover plate Groove intended as an elasticity-increasing expansion fold. By the The presence of this second groove will increase the flexibility and compliance of the Barrel cover in the radial direction as well as in the axial direction - especially in the internal pressure test - further increased.

In a further embodiment of the invention it is provided that the radial extension lengths the barrel lid segment areas in front of or around the sheet piling (s) and the Barrel cover segments outside the sheet piling areas through a targeted selection the steepness or the pitch angle of the conical or curved ring pieces trained side walls of the groove or grooves are adjustable or predeterminable. A targeted adjustment of the stretch lengths is achieved in that the side walls the groove or the grooves are formed differently steep. By a The slope length can be increased or increased with greater steepness.

Since the second circumferential groove (= expansion groove) through the existing (s) Sheet pits can be interrupted by the measures of the deeper groove base or the greater steepness of the groove side walls also very particularly a targeted adjustment of the stretch lengths can be created.

As an embodiment variant it can be provided that the measures of deeper groove base and / or the greater steepness of the groove side walls realized only in the outer engagement groove with the larger diameter are. According to another embodiment variant, it can also be provided that the Measures of the deeper groove base and / or the greater steepness of the groove side walls in the outer engagement groove as well as in the second groove (= expansion groove) with the smaller diameter in a correspondingly coordinated manner Form are realized. This can e.g. B. from the diameter of the drum lid, from the Material (e.g. PE / HDPE, PP, sheet steel or similar) of the barrel lid or de The size and shape of the sheet skip (= sheet casing) depend on which option is preferable. The transition from the deepest bottom of the groove directly in front of the bung to the highest groove base in the cover segment areas offset by 90 ° to the sheet skip can also according to an advantageous embodiment of the invention continuously and continuously.

The measures of the targeted stretching length adjustment are advantageous for one liquid-tight plastic barrel cover, in which the groove base of the engaging groove a width (= radial extension) of 8 mm to 25 mm, preferably approx. 15 mm, has, with on the inside of the barrel lid in the outside transition area from the bottom of the groove to the conical or curved ring section (= inner Leg of the inverted U-shaped lid edge) an axially extending (cylindrical) ring piece connects.

Figur 1

ein erfindungsgemäßes Deckelfaß in Teilschnittansicht des rechten oberen Faßkopfes mit einer umlaufenden Nut am Faßdeckelrand,

Figur 2

eine Draufsicht auf den Faßdeckel des Deckelfasses gemäß Fig. 1,

Figur 3

in schematischer Darstellung ein bekanntes Kunststoff-Deckelfaß in Seitenansicht im Moment des seitlichen Aufpralles (Mantelfall) auf den Boden,

Figur 4

das bekannte Kunststoff-Deckelfaß gem. Fig. 3 in Vorderansicht im Moment des seitlichen Bodenaufpralles,

Figur 5

ein anderes erfindungsgemäßes Deckelfaß in perspektivischer Ansicht mit abgenommenem, danebenstehenden Faßdeckel und Spannring,

Figur 6

eine Draufsicht auf den Faßdeckel mit Spannring gemäß Fig. 5,

Figur 7

einen modifizierten Faßdeckel mit Spundmulden ohne Spundöffnungen,

Figur 8

einen anderen erfindungsgemäßen Faßdeckel in Draufsicht,

Figur 9

einen Querschnitt durch den Faßdeckel gemäß Fig. 8 außerhalb der Spundmulden,

Figur 10

einen Querschnitt durch den Faßdeckel gemäß Fig. 8 durch beide Spundmulden,

Figur 11

einen weiteren erfindungsgemäßen Faßdeckel in Draufsicht,

Figur 12

einen Querschnitt durch einen anderen modifizierten Faßdeckel,

Figur 13

einen Teilquerschnitt durch einen weiteren modifizierten Faßdeckel und

Figur 14

einen Querschnitt durch den Faßdeckel gemäß Fig. 11 durch beide Spundmulden.

The invention is explained and described in more detail below on the basis of exemplary embodiments schematically illustrated in the drawings. Show it :

Figure 1

an inventive lid barrel in a partial sectional view of the right upper barrel head with a circumferential groove on the edge of the barrel lid,

Figure 2

2 shows a plan view of the barrel lid of the lid barrel according to FIG. 1,

Figure 3

a schematic representation of a known plastic lid barrel in side view at the moment of a side impact (jacket fall) on the floor,

Figure 4

the well-known plastic lid barrel acc. 3 in front view at the moment of the lateral ground impact,

Figure 5

another lid barrel according to the invention in a perspective view with the barrel lid and clamping ring removed, which is standing next to it,

Figure 6

5 shows a plan view of the drum lid with the clamping ring according to FIG. 5,

Figure 7

a modified barrel cover with sheet pits without sheet openings,

Figure 8

another barrel lid according to the invention in plan view,

Figure 9

8 shows a cross section through the drum cover according to FIG. 8 outside the sheet pits,

Figure 10

8 shows a cross section through the drum cover according to FIG. 8 through both sheet pits,

Figure 11

another barrel lid according to the invention in plan view,

Figure 12

a cross section through another modified drum cover,

Figure 13

a partial cross section through a further modified drum cover and

Figure 14

a cross section through the drum cover of FIG. 11 through both sheet pits.

In Figure 1 , the reference numeral 10 denotes a lid barrel according to the invention, which shows a barrel body 12 with attached barrel lid 14 and clamping ring 16. The drum cover 14 has a central flat cover plate 18 and a U-shaped cover edge 20 which is open at the bottom and has an outer ring piece 22 and an inner ring piece 24. A circumferential seal 26 is inserted into the U-shaped lid rim 20, which seals the barrel lid 14 in a gas-tight and liquid-tight manner on the upper mouth edge of the barrel body opening when the clamping ring 16 is closed. The central cover plate 18 is connected via an obliquely conically downwardly extending ring piece 28 to the inner ring piece 24 of the U-shaped lid edge 20 such that there is a piece between the obliquely conical or also arched ring piece 28 and into the barrel body opening extending inner ring piece 24 of the U-shaped lid edge results in a circumferential engaging groove 30.

In the normal lid areas (outside the sheet pits and outside the Residue emptying bevel) should be - in the present case approximately wedge-shaped - Engagement groove 30 a depth of at least 15 mm from the bottom of the groove to Have measured height of the upper end edge 32 of the U-shaped lid edge 20. For building up a supporting internal pressure with appropriate stack loading the central flat cover plate 18 protrudes about 6 to 12 mm above the upper end edge 32 of the lid rim over. Is in the edge region of the flat cover plate 18 a lowered bung 34 with bung 36 and Bunghole opening 38 formed. The clamping ring 16 engages with its upper one Leg one at the lower edge of the outer ring piece 22 of the lid edge 20th arranged, radially outwardly projecting lid edge flange 46 and with its lower leg one with a certain distance of about 40 mm below the barrel opening arranged on the outer wall of the barrel body 12 jacket flange 48 and presses the drum lid 10 gas and liquid tight onto the drum opening. This way of fastening of the barrel lid with a lower clamping ring corresponds to the type of 1975 developed by Mauser drum lid for the worldwide widespread and known "Standard lid barrel". In the present case, the lid barrel 10 is inserted with one thin-walled inliner 50 (= foil bag).

As can be seen more clearly from the plan view in FIG. 2 , the flat cover plate 18 has a symmetrical flattening or bevel 40 on the side next to the sheet trough 34 for optimal residual emptying of the cover barrel in a slightly tilted overhead position. A bung plug is screwed into the 2 "bunghole connector and both are covered by a pressed-on sealing cap 42. On the other side of the barrel cover 14, a second smaller 3/4" bunghole opening is also recessed in a bunghole 44 and also by a sealing cap 42 'covered. According to the invention, the groove base of the engaging groove 30 is formed deeper in the area in front of the sheet pits 34, 44 than in the adjacent areas outside the sheet pits 34, 44 or outside the bevel 40. In order to make this clear, various barrel cover segments are identified. The lid segments a, b and b 'are symmetrical. The cover segments c and c'directly in front of the sheet pits 34, 44 have different circumferential lengths with a greater depth of the groove base corresponding to the width of the respective sheet pits 34 and 44. The cover segments a, on the other hand, denote the area with a normal depth of the groove base and the segment areas b and b ′ denote the transition sections from normal depth to the greater depth of the groove bottom in front of the sheet pits.

To explain the deformation processes in the event of a lateral impact (= jacket fall) on the floor, FIG. 3 shows a side view of a lid barrel, the normal state in solid lines and the state of greatest deformation in dashed lines at the moment of impact with the ground (= underground). outlined. In Figure 4 , the lid barrel is shown in front view. The critical points for the liquid-tight cohesion of the barrel body, barrel lid and clamping ring are identified here with A (Fig. 3), C and D (Fig. 4). The greatest axial bulge of the cover occurs in the area of point A. The flattening CAD leads to strong radially inward tensile stresses in the outside areas C and D. In these two areas, the barrel body or the barrel body edge, on which the cover is fixed by means of a clamping ring, tries to expand radially outward; this also causes a strong tensile stress in the barrel body edge, which is directed radially outwards. Due to the strongest buckling of the cover, which is superimposed here, and the high tensile stresses acting in opposite main directions, the drum cover is usually detached or pulled out of the upper leg of the tensioning ring at such a point at such a point.

In the event of a diagonal fall or an oblique impact of the edge of the cover with a clamping ring on the ground the lid is strongest in the area 180 ° from the point of impact burdened by superimposed radial and axial tensile stresses because of barrel body and Lid be braked abruptly, but the barrel content strives to fall in the direction of fall to move on (surge pressure). The cover becomes strong there in the axial direction bulges, which reduces its diameter, and the lid rim becomes pulled out from under the upper leg of the tension ring.

The elasticity of a drum lid can be provided by the provision of a further circumferential one Expansion groove in the outer area of the central ceiling pane under enlargement radial elongation lengths are improved; from this increase in elongation lengths the sheet piling areas are left out and these areas thus represent by the shorter stretch lengths and by the material stiffening the problem areas with extreme bending loads due to the bung supports. The measures according to the invention can be used to set the Carry out expansion lengths in the drum lid. So on the one hand, the same everywhere Strain lengths and thus a reduction of the stress peaks or a targeted one Stress relief in the sheet pile housing areas can be set; on the other hand can also be deliberately deliberately set uneven extension lengths so that in the cover segments c and c 'with the bung housings longer stretch lengths in Lids are given as z. B. in the 90 ° offset cover segments a such that the highest stress loads in the uncritical, highly elastic cover areas be relocated.

FIG. 5 shows a further cover drum 10 according to the invention with the drum cover 14 and clamping ring 16 removed. The barrel body 12 has two pronounced rolling rings in its central cylindrical region and a circumferential solid floor rolling ring in the transition region from the barrel wall to the barrel bottom. The drum lid 14 has the circumferential engaging groove 30 directly behind the lid edge 20 and in the outer region of the flat central cover disk 18 a further circumferential, approximately V-shaped expansion groove 52 in cross section. This expansion groove 52 is only interrupted by the two opposite side sheet pits 34, 44. In the area in front of these two sheet pits 34, 44, the outer engagement groove 30 is formed deeper than in the other lid edge areas outside the sheet pits. The lower-lying area pieces 54, 56 (segments c, c ') with the adjoining transition inclined pieces 58, 60 (segments b, b') to the higher-lying basic groove level (segments a) are clearly recognizable here.

The barrel cover design from FIG. 5 can be seen again in FIG. 6 in a top view with the clamping ring 16 clamped on. In comparison to this, FIG. 7 shows an identical barrel cover 14 'with a circumferential engaging groove 30 and a circumferential expansion groove 52 with bung troughs 34, 44 arranged therein, however, with this cover design, the bung nozzles are not designed with bunghole openings. The measure of the deeper groove base in the engaging groove 30 in front of the sheet pits is also implemented here. If e.g. For example, if a cover version without bunghole openings - as shown in FIG. 7 - is desired by the customer, such a cover can be manufactured in the same injection mold that is used for the cover according to FIG. 6. Then only two corresponding blind pieces need to be inserted into the bung openings of the injection mold. A second expensive injection mold without bunghole openings is then not necessary. For the sake of simplicity, the same reference numerals are used for the same components as before for the further exemplary embodiments of the drum lids shown.

FIG. 8 shows a liquid-tight barrel cover 10 which, in a special embodiment, has a flat, about 16 mm wide groove base in the outer circumferential engaging groove 30. The flat groove base of the engaging groove 30 adjoins the downwardly open U-shaped lid edge 20, with a short outer leg (= ring piece 22) and an inner leg (step 24) which is stepped or cranked here. From the bottom of the groove, as an obliquely conical or arched ring piece 28, the inner side wall of the engagement groove 30 rises to the height of the central flat cover plate 18. The slope angle of this sloping side wall is approximately 55 °. In order to be able to adjust the expansion lengths in the various cover segments in a targeted manner, the angle of inclination of the conical or obliquely curved ring pieces (= side walls of the grooves) can vary or be predetermined between approx. 30 ° and 70 °. The two diametrically opposite sheet pits 34, 44 are arranged in the outer region of the raised central cover disk 18. In the retracted (= lower lying) bung 34 the upstanding bung 36 is provided with the 2 "bung hole and in the smaller bung 44 the smaller bung is provided with the 3/4" bung. Also in the outer area of the central cover plate 18, the second partially circumferential groove 52 is designed as a V-shaped expansion groove, the course of which is interrupted by the sheet pits 34 and 44 and which runs flush with the bottom of the groove into the plane of the bottom of these two sheet pits. The outer obliquely conical or curved side wall of the expansion groove 52 is designated by the reference number 62 and the inner side wall by 64. The side walls 62 and 64 each have a pitch angle of approximately 45 °, so that the opening angle for the expansion groove 52 is approximately 90 °. However, these pitch angles can also be changed or adapted to a desired stretch length. For example, a side wall can be designed to run at different steepnesses, the transitions between the different steepnesses then being designed to flow smoothly into one another. As can be seen in FIG. 8, between the two grooves 30 and 52 there is an approximately V-shaped ring element 66 (= back piece) which is open towards the inside of the cover and whose outer boundary is defined by the inner conical side wall of the engaging groove 30 and its inner boundary is formed by the outer conical side wall of the expansion groove 52. Furthermore, it can be seen that on both sides of the lower part 54 of the engaging groove in front of the bung 34 the oblique connection pieces 58 and on the lower part 56 in front of the bung 44 on both sides the oblique connection pieces 60 to the normal (= higher) level of the groove base connect the engaging groove.

FIG. 9 shows a cross-sectional illustration of the drum cover from FIG. 8 in an area outside the sheet pits, e.g. B. in a cover area offset by 90 ° to the sheet pits. In the outer area of the central cover plate 18, the V-shaped expansion groove 52 is arranged with an opening angle of approximately 90 °. Between the expansion groove 52 and the engagement groove 30, the likewise V-shaped, downwardly open ring element 66 (back piece) rises. The flat groove base of the engaging groove has a width (= radial extension) of 15 mm at normal depth - shown in solid lines. For comparison, the deeper groove base in the offset area in front of the sheet pits is indicated in dashed lines. As a special feature of this lid design, it can be seen that the inner ring piece 24 of the U-shaped lid edge 20 is first slightly cranked (= approximately S-shaped curved) and then elongated in the axial direction in such a way that it is approximately when the lid is placed on the barrel mouth 25 mm to 55 mm, preferably about 35 mm, - measured from the lower edge of the outer ring piece 22 of the U-shaped lid edge - extends far into the barrel mouth. Viewed from the inside of the drum lid, this extension is designed as a cylindrical ring piece 68 extending in the axial direction in the outside transition area from the bottom of the groove to the conical or arched ring piece 24 (= inner leg of the U-shaped lid edge open at the bottom). Likewise, a second, axially extending (cylindrical) ring piece 70 is formed in the inside transition area from the bottom of the groove to the inside of the conical or curved ring piece (= connecting ring piece to the central cover plate 18 or to the expansion groove 52). The cover area between the U-shaped cover edge 20 and the ring element or ring back 66 or the central cover plate 18 is thereby given an H-shaped cross-sectional configuration. This construction proves to be extremely resistant to deformation, particularly in the case of hydraulic internal pressure and drop tests. Permanent kink deformations, e.g. B. after barrel crashes, are essentially intercepted by the inner ring piece 70 or take place there, so that no permanent deformations remain in the outer ring piece 68 and the lid drum remains liquid-tight. The axial extent of the ring pieces 68, 70 - measured from the underside of the groove base - is between 8 mm and 30 mm, preferably approximately 14 mm.

In FIG. 10 , the cover 14 can now be seen in a slightly modified form in a cross-sectional representation through the bung areas. Here, the deeper groove base of the engaging groove 30 in front of the sheet pits 34 and 44 is shown in solid lines, while the normal, higher groove base of the engaging groove outside the bung areas is indicated in comparison with the dashed lines. In this embodiment variant, the axial extent of the outer ring piece 68 is greater than the axial extent of the inner ring piece 70. The axial extent of the outer ring piece 68 should be between 8 mm and 30 mm, preferably approximately 18 mm, and the axial extent of the inner ring piece 70 between 8 mm and 20 mm, preferably about 12 mm. In the case of conventional drum lids with lateral bung supports, the level of the bung bottom is usually the same height (flush) as the groove base of the circumferential engaging groove. An essential feature of the drum cover according to the invention is that the groove base of the engaging groove in front of the sheet skip is in each case still approximately 10 mm to 14 mm, preferably approx. 12 mm lower than the plane of the sheet skip bottom (= step transition from sheet skip / groove bottom) ).

Another embodiment of a drum lid according to the invention is shown in plan view in Figure 11 . Here, the bung 44 with the small 3/4 "bunghole opening has a special, broad shape. This also results in particularly elongated transition pieces or inclined connecting pieces 60 (= segment areas b ') on both sides of the deeper piece 56 of the engagement groove 30 the bung 44. The length of the inclined connecting pieces 58 (= segment areas b) on both sides of the lower piece 54 in front of the bung 34 with the 2 "bung hole 38 is a little longer, but this is due to the fact that the 2" -Spill designed as a residual emptying bung and for this purpose the corresponding bevel 40 is provided on both sides of the sheet skip in the edge region of the central cover plate 18. In order to ensure almost complete emptying of the cover barrel in a slightly inclined overhead position and to prevent liquid residues behind or between the circumferential cylindrical ring pieces 68, 70 remain on the inside of the lid, it is provided that a radially extending drainage channel 74 is formed in the middle of the 2 "outlet bung within the engaging groove 30. On the top of the cover, this drainage channel has a channel back 72 which rises obliquely towards the center of the cover, which opens flush on the outside into the lower-lying piece 54 and which on the inside rises to the level of the normal groove base (outside the bung area). In addition, correspondingly inclined passages 76 (bores) are made through the two cylindrical ring pieces 68, 70 within the course of the channel. This means that even the last liquid residue accumulating behind the ring pieces can run out of the outlet bung automatically. The drainage channel 72/74 with the bores 76 can also be seen in the cross-sectional illustration of the drum cover (according to FIG. 11) in FIG. 14 . In Figure 13, the same barrel lid is shown. The only modification here is a 2 "bung with fine thread (US version) instead of the 3/4" bung.

Figure 12 shows the same drum cover in the version without bung and spigot holes. For this purpose, instead of the removable and interchangeable inserts for the respective bung nozzles, only corresponding blind pieces are inserted into the injection mold.

It goes without saying that the described and in the different Drawings shown individual features interchanged and can be combined with each other.

According to the present invention, a deeper groove formation in the cover segment areas c, c 'in front of the sheet pits or / and a flatter or steeper inclination of the groove side walls in the segment areas a outside the sheet pits finally be provided that the barrel cover in the areas outside of the sheet piling, somewhat shorter expansion lengths or shorter Has surface lengths than in the areas in front of the sheet pits. This will in a simple way a targeted shift of the voltage peaks to uncritical ones allows more elastic lid areas outside the stiffer sheet pile areas and the tightness of the lid barrel according to the invention is in case of barrel crashes and with internal pressure loads significantly increased, so that it is suitable for use by liquid filling goods is ideally suited and even for certain dangerous liquids Filling goods can be approved.

During usual, lidded barrels filled with liquid usually in case of barrel crashes Leaks from a height of 1.2 m already leak and sometimes even the lid jumps off, the lid barrel according to the invention remains even at heights of up to 1.4 m still absolutely liquid-tight.

Reference number list

10th

Lid barrel

12th

Barrel body

14

Drum lid

16

Tension ring

18th

central flat cover disc

20th

U-shaped lid rim

22

outer ring piece (20)

24th

inner ring piece (20)

26

Sealing ring (14)

28

obliquely conical ring piece

30th

Engaging groove (20/28)

32

upper front edge (20)

34

Sheet skip

36

Bunghole connector

38

Bunghole opening

40

Residual emptying bevel (18)

42

Sealing cap

44

Sheet skip

46

Cover flange

48

Jacket flange

50

Inline skates

52

V-shaped expansion groove

54

lower-lying piece (30, 34)

56

lower-lying piece (30, 44)

58

sloping connector (30, 54)

60

sloping connector (30, 56)

62

outer side wall (52)

64

inner side wall (52)

66

Ring element = back piece (52/30)

68

outer cylindrical. Ring piece

70

inner cylindrical. Ring piece

72

Drainage channel (external back)

74

Drainage channel (inner channel)

76

Through hole

78

2 "bung (US version)

Claims (19)

1. A lidded barrel (10) for storing and transporting in particular hazardous liquid or solid bulk materials, having a cylindrical or conical barrel body (12) with an upper, rotationally asymmetrical barrel lid (14) and a U-shaped clamping-ring closure (16) which engages under a flanged rim (48) provided on the outer barrel wall in the area of the upper barrel opening and engages over the outer rim (20) of the barrel lid (14) and in the closed state fixes it on the barrel opening for a closure impermeable to gas and liquids, wherein the barrel lid (14) is provided with at least one bung well (34, 44) which is arranged laterally and is recessed inside the central lid plate (18) and in which a bunghole (38) closable in a gas- and liquid-tight manner can be provided, and at least one continuous gripping groove (30) is provided between the central flat lid plate (18) and the rim (20) of the lid, characterized in that suitable provisions are made and incorporated between the recessed bung well (34, 44) and the upper front edge (32) of the outer U-shaped rim (20) of the barrel lid (14) open towards the bottom, according to which the radial linear extension lengths (surface lengths) - as measured from the centre of the lid to the upper front edge of the U-shaped lid rim (20) - of the said barrel-lid area or barrel-lid segment with the bung well or wells (34, 44) are elongated as compared with the adjacent barrel-lid areas or barrel-lid segments outside the said bung well (34, 44), in such a way that in the areas with the bung well or wells (34, 44) the barrel lid (14) has extension lengths or surface lengths of at least equal length as measured in the radial direction from the centre of the lid to the front edge of the outer lid rim (20).
2. A lidded barrel according to Claim 1, characterized in that the groove base of the continuous gripping groove (30) varies in depth in the circumferential direction, the said groove base being deeper in the area or areas in front of the bung well or wells (34, 44) than in the circumferential regions away from the bung well or wells (34, 44).
3. A lidded barrel according to Claim 2, characterized in that the transition from the regular, uniform depth of the groove base of the continuous groove (30, 52) outside the areas in front of the bung well or wells (34, 44) to the greater depth of the groove base directly in front of the bung well or wells (34, 44) is in each case formed by a flat transitional slope or a sloped connecting member (58, 60).
4. A lidded barrel according to Claim 3, characterized in that the sloped connecting member (58, 60) extends in the circumferential direction over a length of about 20 mm to 80 mm, and preferably about 60 mm.
5. A lidded barrel according to Claim 2, 3 or 4, characterized in that the transition from the greater depth of the groove base directly in front of the bung well or wells (34, 44) to the regular, shallower depth of the groove base in the lid-segment areas offset by 90° relative to the bung well or wells (34, 44) is continuous and preferably along an even, gentle slope.
6. A lidded barrel according to Claim 2, 3, 4 or 5, characterized in that the piece (54, 56) with a deeper groove base extends in the circumferential direction over a distance about identical to the width of the bung well or wells (34, 44).
7. A lidded barrel according to one of the preceding Claims 2 to 6, characterized in that in the case of a larger lidded barrel having a capacity of about 220 litres (= 55 US gal.) and a barrel-lid diameter of about 560 mm, the difference in depth between the deeper groove base and the regular groove base is between about 5 mm and 15 mm, and preferably about 7 mm.
8. A lidded barrel according to one of the preceding Claims 2 to 6, characterized in that in the case of a smaller lidded barrel having a capacity of about 120 litres (= 36 US gal.) and a lid diameter of about 460 mm, the difference in depth between the deeper groove base and the regular groove base is between about 2 mm and 12 mm, and preferably about 6 mm.
9. A lidded barrel according to one of the preceding Claims 1 to 8, characterized in that a second, continuous or partly continuous groove (52) in the periphery of the flat lid plate (18) is provided as an expansion channel.
10. A lidded barrel according to one of the preceding Claims 1 to 9, characterized in that the radially linear extensions of the barrel-lid segment areas in front of and around the bung well or wells (34, 44) as well as the barrel-lid segments away from the bung well areas can be pre-defined and pre-selected by means of a desired selection of the steepness or angle of inclination of the conical or rounded circular elements constituting the side walls of the groove (30, 52).
11. A lidded barrel according to Claim 9 or 10, characterized in that the provision of a deeper groove base or the variation of the steepness of the groove side wall is made exclusively in the outer gripping groove (30) having the larger diameter.
12. A lidded barrel according to Claim 9 or 10, characterized in that the provision of a deeper groove base or the variation of the steepness of the groove side walls is made in both the outer gripping groove (30) having the larger diameter and the second groove (52) having the smaller diameter.
13. A lidded barrel according to one of the preceding Claims 1 to 12, characterized in that the barrel lid (14) displays somewhat greater linear extensions or surface lengths in the areas in front of and/or around the bung well or wells (34, 44) than in the areas away from the bung well or wells (34, 44).
14. A lidded barrel according to one of the preceding Claims 2 to 13, characterized in that the transition from the deepest groove base directly in front of the bung well (34, 44) to the shallowest groove base in the lid-segment areas offset by 90° relative to the bung well (34, 44) is continuously and without steps.
15. A lidded barrel according to one of the preceding Claims 10 to 14, characterized in that the groove base of the gripping groove (30) has a width (= radial extension) of from 8 mm to 25 mm, and preferably about 15 mm, wherein on the inside of the barrel lid (14) an axially extending (cylindrical) circular element (68) is attached in the external transition area from the groove base to the conical or rounded, rising annular member (= the inner leg of the reverse U-shaped rim of the lid).
16. A lidded barrel according to one of the preceding Claims 10 to 15, characterized in that on the inside of the barrel lid (14) a second axially extending, cylindrical annular member (70) is attached in the inner transition area from the groove base to the inner conical or rounded, ascending annular member (= annular attachment member) to the central lid plate (18) or to the expansion groove (52).
17. A lidded barrel according to one of the preceding Claims 10 to 16, characterized in that the axial extension of the annular members (68, 70) - as measured from the underside of the groove base - is between 8 mm and 30 mm, and preferably about 14 mm.
18. A lidded barrel according to one of the preceding Claims 10 to 17, characterized in that the axial extension of the outer annular member (68) is greater than the axial extension of the inner annular member (70).
19. A lidded barrel according to Claim 18, characterized in that the axial extension of the outer annular member (68) - as measured from the underside of the groove base - is between 8 mm and 30 mm, and preferably about 18 mm, and the axial extension of the inner annular member (70) is between 8 mm and 20 mm, and preferably about 12 mm.

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