DE8517543U1 - Portable press - Google Patents

Description

Transportable Press for the high density of radioactive waste from nuclear power plants

The invention relates to a transportable i

ro Press about high density radioactive *

Waste materials from nuclear power plants containing !

a standing, height-adjustable stamp on a press package in a die, which consists of two vertically

standing and connected by a swivel joint

the associated conceivable and in the |1

Closed position for locking shells |

consists.

When operating a nuclear power plant, radioactively contaminated waste is regularly produced, which must be disposed of under special safety precautions and then permanently stored. This waste is collected in containers, of which 1,000 barrels are produced in a power plant within a year3, for example. In order to dispose of this waste at the lowest possible cost,

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To eliminate the waste, the filled collection containers are compressed with a prosse under a very high pressure of around 16 &iacgr;Φ&idigr; (mega newtons). The resulting pressed packages are in turn collected together with other uniform packages in Sanune Ige containers, which are then sent for final storage.

A known press (DE-OS 32 13 544) has a cylindrical die and a horizontally working pressure stamp with a round cross-section. When operating this press, before the pressing process begins, the cylindrical container to be pressed is fed from above into a chamber that lies between the die and the extended stamp. The collecting container is then moved into the die with the cylindrical pressure stamp and pressed. However, such a press requires a considerable length. In contrast, DE-OS 33 19 698 shows a press for the high-pressure treatment of radioactive waste, which only has a small height or length.

so that it can be transported in a container that is common for road transport, because the pivoting die consists of two pivoting shells that are vertical during operation and connected to one another by a swivel joint. This press does not require a chamber for storing the collecting container between the die and the extended punch, because the collecting container, which is designed as a pass, can be inserted from the side when the die is open.

In this known press, the two shells are semi-cylindrical or semi-ring-shaped in cross section, so that

v_y the press chamber enclosed by the die

The pressed part to be produced, which consists of the compressed material, is therefore also circular in cross-section. However, this has a significant disadvantage, because when storing round barrels that are close together and on top of each other,

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Due to the round cross-sections, there are two free spaces between two barrels lying next to each other and two free spaces between two barrels lying on top of each other next to their respective contact lines. Therefore, such pressed parts are possibly made several times in appropriately designed

collected in round barrels for disposal

If the radioactive waste is unloaded into a container to be disposed of for final storage, experience has shown that it is only possible to achieve a packing density of around 50% of the container or an effective unloading of only 50% of the container. This is particularly unsatisfactory because the costs of final storage of radioactive waste are generally very high. The situation is different if a container intended for final storage is filled in such a way that no or only a very small amount of free space remains between the individual waste products to be disposed of in the stored state. This is the case if the compacts are of a columnar or cubic shape, so that they are in storage

not only touch each other linearly, leaving large free spaces, but lie flat against each other, as this allows a packing density or container capacity utilization of more than 90% to be achieved, thus bringing about a significant reduction in disposal costs.

According to the invention, this advantage can be achieved by the fact that the shells of the die of the press are U-shaped in cross-section and in their closed position enclose a press chamber with a square cross-section, which can also be square. With such a design, columnar or cube-shaped pressed parts are produced, which can be stored much more economically than those with a round cross-section. On the other hand, the use of the press is not limited to the processing of barrels with a square or rectangular cross-section, because it is also possible to process the round chambers that have been generally used up to now.

It has also proven to be advantageous when the inner edges of the die

lift

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len are rounded, as this makes it easier to open the die after a pressing process.

Further features of the invention emerge from the subclaims.

An embodiment of the invention is explained below with reference to a drawing. The drawing shows:

Figure 1: a press in longitudinal section and

Figure 2: a cross section along the line II - II of Figure 1

The press shown in the drawing for the high compression of radioactive waste material© under a pressure of approx. 24 megatons has a counter pressure plate 1, which has a pressure cylinder 2 on its underside. In the pressure cylinder 2 is the stamp, which consists of a piston rod 3 as well as a piston 7 5 and a stamp pressure plate 4. The stack pressure plate 4 has a larger diameter than the piston

rod 3 and is attached to it in a replaceable manner so that it can be replaced after partial wear without having to rework the entire piston rod 3.

Below the stamping plate 4, in whose

•x top dead center pitch according to the hatched

In the representation in Figure 1 there is the matrix, which consists of two pivoting shells 5 and 5'.

The shafts 5 and 5' are U-shaped in cross-section. They enclose a press cannon 53 that is square in cross-section and columnar in overall shape. Their inner edges 54 are rounded.

The two shells 5 and 5' are pivotally connected to one another by a swivel joint 6. In their closed working position they can be locked by a height-adjustable locking block 7, which is provided with a recess 7*. The recess 7* is in the transverse direction according to Figure 2.

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cut dovetail-shaped and conical in height, so that in the locking position it encompasses a cone 8 of the two shells 5 and 5* and thus locks the die, while for the release

;■■ locking only a slight increase

l[ of the locking block 7 is required to

I: -v to release cone 8» This increase is

^ by two cylinders 11 and 11', which

" Locking block 7.

■ Opening and closing the die are

.; Two hydraulic actuating cylinders 21 and 22

provided, one of which engages one of the shells 5 or 5 ¹ and moves them into an open position, which is shown in dashed lines in Figure 2.

If the shells 5 and 5* of the die are in the opening position, a waste container filled with waste materials can be introduced radially into the opening of the die via a roller belt 12 as shown by arrow 14. The pressed press package can be placed on the second roller belt 13.

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to set it radially accordingly
to be called upon by arrow 14*

Make a closing and locking of the !

Die becomes the control for the stamp |

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can be retracted. The

Stamp up to a load limit of approx.

4 1/2 Meganewton. After reaching this |

value the stamp moves with reduced |

Speed continues until a load of &Ggr;

approx. 20 meganewtons is reached, but

It should be noted that the maximum load is tat- &idigr; ^:

can actually be larger. The |

Collection container pressed together to form an i

Press package 9, which is shown in Figure 1 at the bottom ]■

the matrix is shown lying down. j

After the pressing process the punch moves in the '&igr;

Rapid traverse back to the top dead center position, I'

which is shown in solid lines in Figure 1

is given. The piston rod |

3 in a hole in the cylinder base 10 \

The re-switching of the stamping process \

speeds and the transitions of the hydraulic j

lischen Pusipan into a pressureless circulation I

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are automatically controlled via oil hydraulics by known means.

The matrix rests on a base plate 23, which in turn supports another plate 23'.

is in which the waste materials are pressed

^ squeezed out liquids absorbed

and discharged to one location.

The base plate 23 is connected to the counter pressure plate by four column-shaped connecting rods 16, 17, 16 and 19. Of these column-shaped connecting rods, the connecting rods 17 and 18 each carry a pivot pin 40 or 40' arranged coaxially to one another, which extends laterally over the base plate and counter pressure plate.

v plate protrudes. By means of this rotation

The press can be pivotally mounted on two support frames 41 and 42 using pins 40 and 40'. Such mounting is of considerable advantage because it enables the press to be pivoted into a horizontal position for transport to a location of use.

During operation, the press rests on feet 50 and 51 , with which it is supported on the ground surface A. For transport, the press is lifted on lifting eyes 60 and 60', respectively, which are mounted on the counter-supporting surface 1. Finally, the press is set down with its pivots 40 and 40' in the receiving bearings of the two trestles 41 and 42. The press can then be swung into the horizontal transport position.

Claims (4)

DIPL-ING RALF MINETTI . ; ">.·'..- . ■ ■, , HAMBURG 1, den Jl '...^ J^ PATENT ATTORNEY j · .■··".'.", ' fefallindamm 15 j ;. ' "F "Femaprechar 33 51 15 &ldquor; ... Bai* Commerzbank AG, Account No. 38/57554 Note: Hansa-Projekt company (blz2oo4ooooi Maschinenbau GmbH. Hamburg Postacheck:Hamburg 250900-207 (Bank code 200 100 20) my file 6050/85 Expectations 1. Transportable press for highly compacting radioactive waste from nuclear power plants, which is pressed with a standing, height-adjustable stamp to form a press package in a die, which consists of two shells which are vertical during operation and connected to one another by a swivel joint and can be locked in the closed position, characterized in that the shells (5, 5 ¹ ) are U-shaped in cross-section and, in their closed position, enclose a press chamber (53) which is square in cross-section. 2. Press according to claim 1, characterized in that the shells (5, 5') enclose a press chamber (53) with a square cross section. .· I i 4 I I tllllll*« III ■ . ti I IIII4 . I &igr;·&Igr; Il I I I I I I I « I I t I ■ III III I III ( 3. Press according to claim 1, characterized in that the shells (5, 5') are of uniform design. 4. Press according to claim 1, characterized in that the inner edges of the shells (5, 5*) are rounded. I I I I II*·