DE29800415U1 - Transport and storage containers for liquids - Google Patents

Description

98 311 Pü/u
PROTECHNA SA

Description Title: Transport and storage containers for liquids

The invention relates to transport and storage containers for liquids, with an inner container made of plastic, each with a closable filling and outlet opening, an outer shell made of metal, a metal base tray mounted on a base frame to accommodate the plastic inner container and a metal lid removably attached to the outer shell, the base frame being designed for handling the transport and storage container by means of a forklift truck, storage and retrieval device or the like (DE 43 41 539 A1).

The need to save on raw materials and on transport and storage costs, as well as legal environmental protection regulations, are forcing the relevant industry to fill liquids for transport and storage in large-volume containers of the generic type that are available on the market and can be used as reusable containers, instead of in barrels with a much smaller volume, as was previously the case.

The transport and storage containers known from DE 43 41 539 Al have the following disadvantages:

The fastening of the base frame of the transport and storage container to a base frame means that handling the container with the frequently used scissor lift trucks is not satisfactory. The emptying of the container using the bottom of the inner container, which is designed as a drainage floor, slopes slightly from two opposite side walls to the middle of the bottom and also has a slight gradient from the rear to the front wall of the container, so that the bottom forms a flat, central drainage channel that is slightly inclined towards the drainage nozzle in the front wall for connecting a discharge fitting.

which is characterized by a base adapted to the drain floor of the inner container with a support edge drawn downwards from the upper edge of the tub, with which the base tub is attached to the corner and center feet of the base frame, means that the base tub is exposed to bending and tensile stresses during storage of liquids due to the weight of the liquid column and during transport additionally due to surge vibrations emanating from the liquid. This double stress requires the base tub to be reinforced accordingly by stiffening beads and by a stiffening bridge attached under the bottom of the tub, resulting in a relatively complex tub construction.

The invention is based on the task of developing a transport and storage container for liquids that can be handled with all common transport devices and is characterized by better residual emptying and a simplified construction compared to the generic container.

This object is achieved according to the invention by a transport and storage container for liquids with the features of patent claim 1.

The subclaims contain advantageous and expedient developments of the invention.

vThe suspension of the base pan for receiving the plastic inner container of the transport and storage container for liquids according to the invention equipped with a sheet metal casing by means of a holding frame on four corner supports which are attached to a base frame standing on four corner feet brings the following advantages:

The base frame can be driven under by gripping arms, lifting platforms and similar lifting devices, so that the transport and storage container can be handled with all common transport devices such as forklifts and scissor lift trucks. The hanging construction of the preferably rectangular base pan with

a tank bottom that slopes down from all four sections of the upper tank edge to the middle of the bottom and a central bottom opening for the outlet nozzle of the inner container to pass through means that the bottom tank is mainly exposed to tensile stress from the liquid column in the inner container, which represents the most favorable type of load in terms of the required material strength, so that the sheet thickness can be dimensioned depending on the maximum tensile stress that occurs plus a safety factor and no additional stiffening of the bottom tank by stiffening beads and separate reinforcing elements is required. Finally, the drain bottom of the inner container, which is adapted to the bottom of the bottom tank in the form of a flat funnel with a central outlet nozzle, enables optimal emptying of the transport and storage containers.

The transport and storage container according to the invention and its further advantages are explained below with reference to drawing figures which show the following:

Fig. 1 is a perspective view of the container,

Fig. 2 a perspective view of the container with the outer shell partially removed and without the inner container,

Fig. 3 a vertical section through the lower area

a corner support and a corner foot of the base frame of the container according to line III-III of Fig. 2 in an enlarged view,

Fig. 4 a vertical section through the upper area of a corner support of the container along line IV-IV of the figure in an enlarged view,

Fig. 5 is a perspective, enlarged view of the upper end of a support, which

Fig. 6 to 9 different types of fastening of the filler neck of the inner container of the transport and storage container in the container lid in an enlarged view,

Fig. 10 the fastening of the outlet nozzle of the inner container of the transport and storage container in the container base in an enlarged view and

Fig. 11 is an enlarged longitudinal sectional view of the outer end of the outlet pipe of the container with the withdrawal fitting.

The transport and storage container 1 used as a single-use and reusable container according to Figs. 1 and 2 for liquid goods, in particular for paints and varnishes, has as main components an exchangeable cuboid-shaped inner container 2 made of plastic, preferably polyethylene, with a rectangular outline and rounded corners, which is equipped with a central filling nozzle 4 in the upper base 3 that can be closed by a screw cap 5 and a square outlet nozzle 7 in the lower base 6 for attaching an outlet pipe 8 and a discharge fitting 9, an outer casing 10 with a cover 11 made of sheet metal and a base frame 12 made of metal that can be driven under by the gripping arms of a forklift or a scissor lift truck, which consists of a base frame 13 standing on four corner feet 14, four corner supports 15 screwed to the base frame 13 and a holding frame 16 screwed to this at a distance above the base frame 13 for suspending a downwardly curved base pan 17 made of Sheet metal for receiving the inner container 2, wherein the bottom 18 of the base pan 17 in the area of the sole 19 has a through opening 20 for the outlet nozzle 7 of the inner container 2.

The bottom 18 of the rectangular bottom tray 17 slopes down from its upper edge 21 to the middle of the tray, and the through-opening for the outlet nozzle 7 of the inner container 2 is in the central

Area of the tub bottom 18. The tub bottom 18 passes over the curved upper edge 21 into a downwardly directed support edge 22 for the outer casing 10, and the bottom tub 17 is placed with its upper edge 21 on the holding frame 16 designed as a tubular frame (Fig. 2 and 3).

The outer casing 10 is inserted into the outwardly rolled lower edge 2 3 of the support edge 22 of the base pan 17 and is welded to it with a roll seam.

Welded to the rounded corners 24 of the support frame 16 are supports 25 stiffened by beads 26, which are screwed to angle pieces 27 that are welded into the lower sections of the inwardly open corner supports 15, which are designed as angle profiles. The supports 25 of the support frame 16 each have a notch 28 that engages in a corresponding notch 29 of the angle piece 27 fastened in the corner supports 15 (Figs. 2 and 3).

Welded into the upper ends of the corner supports 15 at a distance from the upper edge 30 thereof are further angle pieces 27 with horizontal legs 27a, which form support surfaces 27b for the four corner feet 14 of a stacked transport and storage container 1, as well as with vertical legs 27c, which have fastening holes 31 arranged at a distance one above the other (Fig. 4).

The two legs 15a, 15b of the corner supports 15 are bent inwards and have slightly downward sloping edge sections 32, which together with the upper straight, horizontal edges 30 of the legs 15a, 15b form a positioning aid for the corner feet 14 of the base frame 12 of a container 1 to be stacked (Fig. 5).

The outer casing 10 is reinforced by an upper stiffening frame 33 made of a flat profile, which together with the outer casing 10 is attached to the vertical legs 27c

which is screwed tightly to the angle pieces 27 welded into the upper ends of the corner supports 15 (Fig. 4).

The cover 11, which has the same shape as the base pan 17, is placed with its outwardly rolled upper edge 11a on the upper edge 10a of the outer casing 10 and is screwed around the circumference to the outer casing 10 and the upper stiffening frame 33.

The lid 11 has a water channel 34 in its outer area, which is delimited by the downwardly directed support edge 11b of the lid and the upper curved lid base 11c. Plastic outlet nozzles 35 with an elastic retaining collar 36 are inserted into corresponding holes in the four corner areas of the water channel 34 and in the outer casing 10, which extend into the corner supports 15 (Fig. 4).

The lid 11 of the transport and storage container 1 has a central opening 37 with a rolled edge 38 for inserting the filler neck 4 of the inner container 2. The filler neck 4 of the inner container 2, which protrudes upwards through the lid opening 37 and is provided with an external thread 39, is fixed in the lid opening 37 by a union nut 40 screwed onto the filler neck and tightened against the opening edge 38 of the lid 11 and can be closed by a screw cap 41 (Fig. 6). Instead of the union nut, a clamping ring can also be used. The union nut 40 seals the filler neck 4 of the inner container 2 against the container lid 11 so that no moisture from the outside can get between the outer casing 10 and the inner container 2.

In the container design according to Fig. 7, the filler neck 4 of the inner container 2, which extends upwards through the opening 37 of the container lid 11, has a collar 42 with an undercut 43 into which the rolled edge 38 of the lid opening 37 engages, as well as an external thread 39 for screwing on a closure cap 41 with a sealing ring 51.

Instead of an external thread, the filler neck 4 of the inner container 2 of the container shown in Fig. 8 has a fastening flange 44 for attaching a closure cap 45 with a corresponding holding flange 46, which is fastened to the filler neck 4 by means of a clamping ring 47 that encompasses the fastening flange 44 on the filler neck 4 and the holding flange 46, with a sealing ring 58 being placed between the two flanges 44, 46.

In a further container design shown in Fig. 9, a ring 49 made of plastic or metal with an external thread 50, which is secured against twisting, is placed on the nozzle 48 of the lid opening 37 formed from the container lid 11 and is held on the nozzle 48 by the outwardly rolled upper edge 48a of the nozzle. The

48 of the lid opening 37, the filler neck 4 of the inner container 2 is held in the neck 48 by an outwardly bent edge 4a resting on the rolled edge 48a of the neck 48. The filler neck 4 of the inner container 2 is secured by a ring provided with an external thread 50

49 of the nozzle 48 can be closed with a screw-on cap 41 with an inserted sealing ring 51.

In a modification of the container design according to Fig. 9, the ring 49 placed on the nozzle 48 of the lid opening 37 can have a fastening flange. To close the filler nozzle 4 of the inner container 2, a closure cap 41 with a retaining flange is placed on the fastening flange of the ring 49 sitting on the nozzle 48 of the lid opening, which is secured by a clamping ring.

The outlet nozzle 7 of the inner container 2, which is pushed through the opening 20 in the bottom 18 of the base pan 17, has a collar 52 with an undercut 53, into which the rolled edge 54 of the bottom opening 20 of the base pan 17 engages to fix the outlet nozzle 7 in the base pan 17, as well as a

Fastening flange 55 for attaching the outlet pipe 8, which is designed as an angle pipe and has a retaining flange 56 corresponding to the fastening flange 55; of the outlet nozzle 7 of the inner container 2, by means of a clamping ring 57 on the outlet nozzle 7. The two flanges 55, 56 of the outlet nozzle 7 and the outlet pipe 8, which are clamped against one another, are sealed against one another by an inserted sealing ring 58 (Fig. 10).

The extraction fitting 9, e.g. a flap valve, with an adapter 59 and a closure cap 60 designed as a screw cap, is inserted into the outer end 8a of the outlet pipe 8, which extends under the base pan 17 to one of the two long outer sides la of the container I. The outlet pipe 8 rests with the adapter 59 on a support 61, which has a coating or support resistant to aggressive liquids with regard to leakage fluid escaping from the extraction fitting 9 and is detachably attached to the base frame 13.

If required, the outlet pipe 8 can also be led to one of the two short outer sides 1b of the container 1.

It is also possible to connect the extraction fitting 9 to the outlet nozzle 7 of the inner container 2 and to attach the outlet pipe 8 with its inner end to the extraction fitting 9, whereby an operating rod is provided for operating the extraction fitting, which is guided to the long or short outside la, lb of the container 1 according to the installation position of the outlet pipe 8. By installing the extraction fitting 9 under the outlet nozzle 7 of the inner container 2, it is avoided that, for example, paint or varnish residues that remain in the outlet pipe 8 after the paint or varnish has been removed from the container 1 and the extraction fitting 9 has been closed and are not caught by an agitator inserted into the container 1, sediment in the outlet pipe 8 and contaminate the paint or varnish as solid particles when paint or varnish is removed again from the container 1.

Deviating from the bottom outlet of the transport and storage container 1 shown in Fig. 10, the outlet nozzle 7 of the inner container 2 pushed through the opening 20 in the bottom 18 of the bottom pan 17 can have an external or internal thread for fastening the outlet pipe 8 by means of a pipe screw connection.

Fittings 62 with crane eyes 63 are screwed to the angle pieces 27 welded into the upper ends of the corner supports 15 (Fig. 4).

U-profile pieces 64 are attached to the corner feet 14 of the base frame 13 to increase the standing area 65 of the corner feet, and under the U-profile pieces 64 of the corner feet 14, coverings 66 made of electrically conductive plastic material are attached in order to achieve good running properties of the transport and storage container 1 when it is transported on roller conveyors (Figs. 1 and 3).

On the four sides la, la, Ib, Ib of the container 1, covering plates 67, 68 are screwed between the outer casing 10 and the base frame 13 to the latter and the corner supports 15 (Fig.

A cover plate 69 is attached under the base frame 13 (Fig. 2).

The outlet pipe 8 with the extraction fitting 9 is covered by a protective flap 7 0 attached to the side of the outer casing 10 (Fig. 1).

The individual components of the transport and storage container, with the exception of the inner container 2, are made of an electrically conductive material, so that electrical charges that can form on the surface of the plastic inner container when liquids are flowing or poured due to liquid friction or influence can flow off into the ground via the base frame 12. Due to the earthing, the transport and storage container for flammable liquids

•&igr;&igr;

and are used in potentially explosive areas.

By installing the plastic inner container in a closed outer metal container, a certain degree of fire resistance of the transport and storage container is achieved.

The modular design enables simple and cost-effective reconditioning of the transport and storage container by replacing the dirty plastic inner container or any other damaged container components.

98 311 Pü/u
PROTECHNA SA

Reference symbols

1 transport and storage container la long outside of 1

Ib short outside of

2 inner containers

3 upper floor of 2

4 Filler neck 4a Edge of 4

5 screw cap for 4

6 lower floor of

7 Outlet nozzle

8 Outlet pipe

8a outer end of 8

9 Extraction fitting

10 Outer jacket

10a upper edge of 10

11 covers of 10

11a upper edge of 11

11b Support edge of 11

lic lid bottom

12 Base frame

13 Base frame

14 corner foot of 13

15 Corner support at 13 15a Leg of 15 15b Leg of 15

16 holding frames

17 Floor tray

18 Floor of 17

19 Sole of 18

20 opening in 18

21 upper edge of 17

22 support edge of 17

23 lower edge of 2

24 rounded corner of

25 Support at 16

26 Reinforcing bead of

27 Angle piece in 15

27a horizontal leg of 17

27b Contact area of 27a

27c vertical leg of

28 Notch in 25

29 Notch in 27

30 upper edge of 15

31 Mounting hole in 27c

32 Edge section of 15a, 15b

33 stiffening frames from

34 water channel of 11

35 spout in 34

36 collars of 35

37 central opening of

38 rolled edge of

39 external threads of 4

40 union nut on

41 Cap for 4 (Figs. 7, 9)

42 collars of 4

43 Undercut of

44 Mounting flange on

45 Cap (Fig. 8)

46 retaining flange at 45

47 clamping ring

48 nozzle of 37 48a upper edge of 48

49 rings on 48

50 external threads of 4

51 sealing ring of 41

52 collars of 7

53 Undercut of

54 rolled edge of

55 Mounting flange of

56 retaining flange of 8

57 Clamping ring for 8

58 Seal for sealing 55, 56

59 adapters to 9

60 cap from

61 support for 8

62 Fitting for

63 Crane eye

64 U-profile piece on

65 stand area of

66 covering of 64

67 Covering sheet

68 Covering sheet

69 Cover plate under

7 0 Protective flap at 10 for 8,

Claims (30)

Protection claims 1. Transport and storage container for liquids, with an inner container made of plastic, each with a closable filling and outlet opening, an outer casing made of metal, a metal base pan attached to a base frame for receiving the plastic inner container and a metal lid detachably attached to the outer casing, the base frame being designed for handling the transport and storage container by means of a forklift truck, storage and retrieval device or the like, characterized by a base frame (13) which can be driven under by a transport device and which rests on four corner feet (14), four corner supports (15) attached to the base frame (13), a holding frame (16) attached to the corner supports (15) at a distance above the base frame (13) for suspending the downwardly curved base pan (17) for the exchangeable inner container (2), the base (18) of the base pan (17) having a through opening (20) for the outlet nozzle in the area of the sole (19). (7) of the inner container (2), as well as an outlet pipe (8) which can be connected to the outlet nozzle (7) of the inner container (2) and leads to the outside of the transport container (1) and a removal fitting (9) which is connected to the outer end (8a) of the outlet pipe (8) or is installed between the outlet nozzle (7) and the outlet pipe (8). 2. Container according to claim 1, characterized by a seal of the filler neck (4) of the inner container (2), which leads outwards through an opening (37) in the container lid (11), against the container lid (11). 3. Container according to claim 1 and 2, characterized in that the plastic inner container (2) is cuboid-shaped, cubic or cylindrical and the base pan (17) for receiving the inner container (2) has a corresponding rectangular, square or circular shape. 4. Container according to one of claims 1 to 3, characterized in that the bottom (18) of the base pan (17) passes over a curved upper edge (.21) into a downwardly directed support edge (22) for the outer casing (10), the base pan (17) is placed with the upper edge (21) on the holding frame (16) and the outer casing (10) is inserted into the outwardly rolled lower edge (23) of the support edge (22) of the base pan (17). 5. Container according to claim 4, characterized in that the bottom (18) of the bottom pan (17) slopes down from the upper edge (21) of the same to the center of the pan and that the through-opening (20) for the outlet nozzle (7) of the inner container (2) is arranged in the central region of the pan bottom (18). 6. Container according to one of claims 1 to 5, characterized in that the outer casing (10) is welded to the supporting edge (22) of the base pan (17). 7. Container according to one of claims 1 to 6, characterized by supports (25) welded to the rounded corners (24) of the holding frame (16), which are screwed to angle pieces (27) which are welded into the lower sections of the inwardly open corner supports (15), which are designed as angle profiles. 8. Container according to claim 7, characterized in that the supports (25) of the holding frame (16) each have a notch (28) which engages in a corresponding notch (29) of the angle pieces (27) fastened in the corner supports (15). 9. Container according to one of claims 1 to 8, characterized in that the corner supports (15) are screwed to the base frame (13). 10. Container according to one of claims 1 to 9, characterized in that the holding frame (16) for the base pan (17) is designed as a tubular frame. 11. Container according to one of claims 1 to 10, characterized by angle pieces (27) welded into the upper ends of the corner supports (15) at a distance from the upper edge (30) thereof, with horizontal legs (27a) which form support surfaces (27b) for the four corner feet (14) of a stacked container (1), and with vertical legs (27c) which have fastening holes (31) arranged at a distance one above the other. 12. Container according to one of claims 1 to 11, characterized in that the two legs (15a, 15b) of the corner supports (15) are bent inwards and have slightly downwardly sloping upper edge sections (32) which, together with the upper straight, horizontal edges (30) of the legs (15a, 15b), form a positioning aid for the corner feet (14) of the base frame (12) of a container (1) to be stacked. 13. Container according to one of claims 1 to 12, characterized by an upper stiffening frame (33) which is screwed together with the outer casing (10) to the vertical legs (27c) of the angle pieces (27) welded into the upper ends of the corner supports (15). 14. Container according to claim 13, characterized in that the stiffening frame (33) is made of a flat profile. 15. Container according to one of claims 1 to 14, characterized in that the base pan (17) and the lid (11) have the same shape. 16. Container according to one of claims 1 to 15, characterized in that the lid (11) is placed with its outwardly rolled upper edge (Ha) on the upper edge (10a) of the outer casing (10) and is screwed around the circumference to the outer casing (10) and the upper stiffening frame (33). 17. Container according to one of claims 1 to 16, characterized in that the lid (11) has a water channel (34) running around the outer region, which is delimited by the downwardly directed support edge (Hb) of the lid (11) and the upwardly curved lid base (lic), and that outlet nozzles (35) are inserted into corresponding bores in the corner regions of the water channel (34) and in the outer casing (10), which extend into the corner supports (15). 18. Container according to one of claims 1 to 17, characterized in that the central opening (37) of the container lid (11) has a rolled edge (38). 19. Container according to claim 18, characterized in that the filler neck (4) of the inner container (2), which is pushed upwards through the opening (37) of the container lid (11) and is provided with an external thread (39), is fixed in the lid opening (37) by a union nut (40) or tightened clamping ring screwed onto the filler neck (4) and tightened against the opening edge (38) of the lid (11) and can be closed by a screw-on cap (41). 20. Container according to claim 18, characterized in that the filler neck (4) of the inner container (2) pushed upwards through the opening (37) of the container lid (11) has a collar (42) with an undercut (43) into which the rolled edge (38) of the lid opening (37) engages, as well as an external thread (39) for screwing on a closure cap (41) or a fastening flange (44) for placing on a closure cap (45) with a corresponding holding flange (46), which is fastened to the filler neck (4) by means of a clamping ring (47) which encompasses the fastening flange (44) on the filler neck (4) and the holding flange (46). 21. Container according to one of claims 1 to 17, characterized in that on the container lid (11) '··! &iacgr;&iacgr;&iacgr;&Sgr;··· a ring (49) made of plastic or metal with an external thread (50) or a fastening flange, which is secured against twisting, is placed on the shaped nozzle (48) of the lid opening (37), which is held on the nozzle (48) by the outwardly rolled or bent upper edge (48a), the filler nozzle (4) of the inner container (2) pushed through the nozzle (48) of the lid opening (37) is held in the nozzle (48) by an outwardly bent edge (4a) resting on the rolled edge (48a) of the nozzle (48) of the lid opening (37), and the filler nozzle (4) of the inner container (2) is secured by a closure cap (41) which can be screwed onto the ring (49) of the nozzle (48) provided with an external thread (50) or a closure cap (41) which can be screwed onto the fastening flange of the nozzle (48) The closure cap (41) placed on the ring (49) sitting in the cover opening (37) can be closed with a retaining flange and a clamping ring. 22. Container according to one of claims 1 to 21, characterized in that the outlet nozzle (7) of the inner container (2) pushed through the opening (20) in the bottom (18) of the base pan (17) has a collar (52) with an undercut (53) into which the rolled edge (54) of the bottom opening (20) of the base pan (17) engages to fix the outlet nozzle (7) in the base pan (17), and a fastening flange (55) for fastening the outlet pipe (8) designed as an angle pipe, which has a holding flange (56) corresponding to the fastening flange (55), by means of a clamping ring (57) on the outlet nozzle (7) of the inner container (2) or that the outlet nozzle (7) has an external or internal thread for fastening the outlet pipe (8) by means of a pipe screw connection having. 23. Container according to one of claims 1 to 22, characterized by a support (61) for the outlet pipe (8) which is detachably fastened to the base frame (13). 24. Container according to one of claims 1 to 23, characterized by fittings (62) with crane eyes (63) which are which are detachably attached to the angle pieces (27) welded into the upper ends of the corner supports (15). 25. Container according to one of claims 1 to 24, characterized by U-profile pieces (64) attached to the corner feet (14) of the base frame (13) to enlarge the standing area (65) of the corner feet (14). 26. Container according to claim 25, characterized by coverings (66) made of electrically conductive plastic material detachably fastened under the U-profile pieces (64) of the corner feet (14). 27. Container according to one of claims 1 to 26, characterized by cladding plates (67, 68) attached to the four sides (la, la, Ib, Ib) of the container (1) between the outer casing (10) and the base frame (13) and to the latter and the corner supports (15). 28. Container according to one of claims 1 to 27, characterized by one or more cover plates (69) or cover plates attached removably on or under the base frame (13). 29. Container according to one of claims 1 to 28, characterized by a covering of the outlet pipe (8) with the removal fitting (9) by a protective flap (70) attached to the side of the container (1). 30. Container according to one of claims 1 to 29, characterized in that the individual components thereof (1) are made of an electrically conductive material.