DE1784625A1 - Removable lid for a container made of prestressed concrete - Google Patents

Description

Patent Attorney ·. Dfpl.-Ing.R.Beetzu. iu i ^. 2? R ': .e .1 t Dipl.-ing. Lamprecht MQiKtMn 22. Stainadorfeir. 10

Γ / 84625

m-nissariat ä! 'Energie Atomique, Paris (France)

removable lid for a container made of prestressed concrete

Me invention relates to a lid for a container made of prestressed concrete, especially for a container with a cylindrical or prismatic circumferential or liantel » wall, which is called the "barrel body", and two final floors «

In order to carry out operational monitoring or! Repairs to the in the Allowing the internals housed in the cavity of such a container to be removed is around a central closure piece around a ring of arranged on the circumference of the container pressure bodies or pressure pieces provided through Circumferential clamping bandages can be pressed radially onto the central locking piece aind and between which radial gaps remain open, the pressure pieces carry anchor devices on their outer face

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gen for longitudinal tendons of the container and supporting devices the circumferential clamping bandages.

A container with such a lid can be opened by removing the lid without the stresses or biases can be changed significantly in the rest of the structural part of the container.

Now, however, the large dimensions of the central locking piece make it difficult to move this locking piece and in particular to lift it using conventional lifting devices.

In order to overcome this disadvantage, the invention provides a lid for a container made of prestressed concrete designed in such a way that its central locking piece consists of several superimposed discs, which through in the longitudinal direction of the container arranged tendons are firmly pressed against each other.

Such a closure piece guarantees perfect and perfect sealing during the closure of the container biological protection; however, the closure piece can easily be removed if one wants to open the container. the The number and thickness of the closure piece discs can always be chosen so that the weight and dimensions of the individual discs are sufficiently small that they can be easily lifted and moved.

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Further other advantages and characteristics of the invention will become apparent from the following description of an exemplary embodiment result, which is illustrated in the drawing. Show it:

Pig. 1 shows a longitudinal section through a removable cover which closes a container made of prestressed concrete;

Fig. 2 is a plan view of the cover according to Pig. 1 at the beginning of the opening process j

Fig. 3 in a partial longitudinal section similar to Fig. 1, a variant of the closure piece.

The pre-stressed concrete container, which is only partially shown in FIG. 1, is a pressure vessel of a nuclear reactor; it should however, it should be understood that the invention is also applicable to containers for other Sweeke. The prestressed concrete container has a side or Llantelwand 1 of substantially cylindrical shape, which is also called "barrel body" and on its inside with a sealing lining 2 is provided, which is covered by thermal insulation 4 towards the inside of the container. The upper end face 3 of the wall of the "barrel body" 1 is light inclined in the direction of the central axis of the container and carries the lid. This lid comprises a ring of a larger one Number of external pressure bodies 6 of approximately trapezoidal cross-section, which rest on the inclined face 3 and on a central locking piece 8 by tightening circumferential bandages be pressed radially. The lid ring or the pressure body of the lid and the barrel body in the longitudinal direction penetrating clamping

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members or tension ropes 29 result in the longitudinal pretensioning of the {entire container <, ^k

The VerachußstUckkörper 8 lying in the middle between the approximately annular sector-shaped pressure bodies 6 consists of several superimposed plates or disks; In the selected embodiment there are two discs, the lower disc 30 resting on the inner id-ngzone of the end face of the barrel body 1 and an upper disc 32 resting on the lower disc 30. The lower disc 30 has an outer annular shoulder 3I ₁ with the it is supported on the inwardly drawn-in upper edge of the end face 3. This king shoulder can be supported over its entire circumference on the face; Preferably, however, only three support points are actually needed to ensure better centering of the locking piece 8, For this purpose, for example, the upper hand of the barrel body 1 can have three inwardly protruding projections as support points of the EinöSChulter or the hanging shoulder is fixed with three support intermediate layers or Connected projections with which it is supported on the end face 3. However, any other supporting means can also be provided «f

The lower disk 30 is provided on its underside with a sealing lining 34, which on its periphery, for example by welding to the sealing liner 2 of the fitting body 1; thermal insulation 36 protects

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also the lining 34 against the inside of the container prevailing heat.

The upper side hole of the lower disk 30 has a substantially frustoconical shape and serves as Support surface for an adapted truncated cone surface 39 on the underside of the upper disk 32. Between the two disks, when the disks are inserted one after the other, a Llörtelzwiselenschicht inserted »

The two disks 30 and 32 are pressed together and fixedly connected by tension members or tension cables 38, one end of which is fixed within the disc 30, while the outer ends are in anchor devices 40, which sit on the outer surface of the upper disk 32.

These tensioning elements or tensioning cables 38 pass freely through the stacked disks in the present embodiment, the two disks 30 and 32 so passing that M can be its voltage set by tightening the anchoring devices 40th

The peripheral surface of the closure piece 8, which is preferably has a prismatic shape and corresponds to the prism that runs through the entire inwardly facing surfaces of the pressure body 6 is rough, the same applies to the inner surfaces of the pressure hulls 6. Joints 20 provided with cement mortar

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are foreseen between these rough surfaces, their Surface roughness is formed either by the concrete of the discs or by corrugated metal sheets 28 and 48, which are attached to ien pressure hulls or the closure piece as an outer cover are appropriate «,

Through the entire Yerschlußstück 8, d, h _e the two discs 32 and 30 results in the middle of a continuous shaft 42 therethrough, which forms an access shaft to the interior of the container. The shaft has a substantially cylindrical shape and can be closed by a stopper, not shown. At the level of the separating or joining surface of the two panes, the shaft 42 has an enlarged section 43 'which allows vertically acting winches 44 to lift the upper pane and tear the mortar joints which connect the two panes when the lid is opened shall be. In a corresponding manner, the upper disc and the pressure bodies 6 are provided with mutually facing recesses 46 for the installation of horizontally acting winches, not shown, which push the pressure body 6 away radially after the circumferential bandages 10 have been loosened or loosened .

The container is opened in the following manner: After opening the shaft 42 and separating the connection between the seal linings 34 and 2 at the bottom. The circumference of the closure device 8 are initially the circumferential bandages 10,

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before the lid and optionally the outer end part of the fitting body surrounded, made tension-free, then the tension of those longitudinal tensioning ropes 29, which are used to tension the plague two diametrically opposite pressure bodies 6a and 6b (Pig. 2) are also removed.

Two horizontal winches in the recesses 4-6 the inner side of the pressure body 6a and 6b are then put into operation to the two pressure body 6a and 6b to move radially outwards and the mortar / joint connections To tear 12, with which the pressure body and the closure body 8 were connected. Then in the radial outwardly displaced position of the pressure bodies 6a and 6b, the longitudinal tensioning cables 29 assigned to them are again tensioned} then repeated the same process occurs with two other pressure bodies: slackening the tension cables 29 »radial displacement of the pressure bodies, simultaneously tearing open the solder seals 12 and again Tension the tension ropes 29 in the new position of the pressure body O

After all pressure bodies have been displaced radially outwards and the central closure body 8 has become free as a result is, the vertical winches 44 are operated to raise the upper disc 32, whereby the flute connection 41 is broken which joins the upper disc with the lower disc JO Association. As soon as the upper pane has become free, it can be lifted with a conventional lifting device and attached to a

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Place a suitable place, for example above one or more of the pressure bodies 6, which for this purpose with three special, Storage projections, not shown, are provided.

The disc 30 in turn is then lifted out and the container is then completely open. Lan can then be any Carry out work inside the prestressed concrete tank.

After opening the container, the surfaces of the lid and its elements which come into contact with one another freed of any trace of mortar that is still hanging on the surfaces, so that the different parts of the lid can be restored for assembling or closing the container are ready.

Closing takes place in the opposite way to opening, by first placing the lower pane 30 on the end wall 3 gufsetzt, then the upper disc under lullen the gap or the connecting joint 41 between the two panes is inserted through relatively dry mortar, the two panes through Tensioning the tendons 38 tightly together and tensioned finally, for each pair of opposing pressure bodies, one after the other, the loosening of the longitudinal tensioning cables 29> the pushing together of the corresponding pressure hulls up close of the closure body 8, with radial gaps remaining open between these sectors, however, the introduction of the mortar joints 12 and finally renewed tensioning of the longitudinal tensioning cables 29 performs.

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If in this way all pressure bodies are brought back into their final position and are clamped in this position, the circumferential bandages 10 are also tightened again. Finally, the sealing lining 34 is connected to the lining 2 of the barrel body by welding and covered by reintroducing the heat protection layer 36

After closing the access shaft 42 by the releasable Stopper, the container is ready to be used again.

All measures of loosening, moving and re-installing the different parts of the cover construction have been carried out without significantly changing the prestressing of the fitting body of the container, since the prestressing elements (practically only the longitudinal tendons) only during for a very limited time and even to a small extent not under tension, but according to the sequence of Work can be put back under tension relatively quickly «Normal lifting devices can be used for opening and closing be used, because the number of discs of the closure piece and, as a result, their thickness or their weight and their dimensions can easily be determined so that the handling of these disks by means of conventional lifting devices can be carried out"

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FIG. 3 shows a variant in which the closure body 8 consists of four essentially identical disks 14, 15, 16, 17 made of concrete and a lowermost disk 18 made of metal. The tendons 38 are anchored in the lowermost disk 18, the upper end of which engages in releasable tensioning and anchor devices 40 which are carried by the uppermost disk 14. The tendons 38 thus act on the entire superimposed concrete disks. The lowermost metal disk 18 is rigidly connected to the sealing skin of the closure piece or in turn directly forms this sealing skin. The outer diameter of the metal disk 18 is a little smaller than that of the other disks and also smaller than the opening to be closed} the edge of the disk is provided with a thin flanged connection piece 19 which is connected to a cylindrical extension 21 of the sealing lining 2 of the container. In the illustrated embodiment, this connection is made by a "lip ^{weld 11} (butt weld), but it could also be carried out in any other way, for example using a detachable connecting seal after removing the disks 14, 15, 16 and 17 from the inside of the central lid opening, so that the craftsman performing this work is essentially protected from the interior of the container by the metal disk 18.

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The lower metal disk 18 and furthermore the whole The structure of the closure body rests on the barrel body 1 via a line console or three projections 23 »the fixed or are integrally connected to the sealing lining 2.

The contact surfaces between the superimposed panes are flat and the panes are directly adjacent to one another. In these surfaces, however, there are recesses for accommodating organs, not shown, for lifting purposes the overlying disc when opening the locking piece intended. Furthermore, the lateral peripheral surfaces of the disks are in direct contact with the inner ones Areas of the circumferential pressure body 6, with walls worked into these Grooves 27 can increase or improve the connection and the seal.

'Of course, other modifications can be made be made in the embodiment that just happened has been described without departing from the scope of the invention

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Claims (3)

Claims (1. ■ removable lid for a container from .Spannbeton, wherein arranged around a central stopper peripheral plungers and the central closure member are pressed by Umfangsbandageη radial m, but open between the pressure bodies radial gaps or -Zwischenräume remain, characterized in that the central closure piece (8) is made up of several disks (30, 32 or 14 to 18) placed one on top of the other, which are firmly pressed together by tension members (38) arranged in the longitudinal direction of the container. 2. Lid according to claim 1, characterized in that the clamping members (38) fixed in the lower disc (32 or 18) are, freely pull through the overlying disks and in anchoring devices arranged on the upper disk (30 or 14) (40) are held. 3. Lid according to one of claims 1 or 2, characterized in that that the lower disc (32) or «(18) and the side wall or the fitting body (1) of the container at three equidistant distant points are in contact with each other. 4. Lid according to one of claims 1 or 2, characterized in that the lower bcneibe (32) an outer xtingjchultur (31) to support .auf die hung-otimflLcho (3) de- Lehl'lt ^ r-rassiicr ^ ors ( 1). 109833/0889 BATH ORIGINAL 5o lid according to one of claims 1 to 4, characterized in that that the contact surfaces or mutually facing surfaces (39 or 41) between the superimposed panes (30, 32) are essentially frustum-shaped " 5. Lid according to one of claims 1 to 5, characterized in that that the closure piece (8) has a central shaft (42) as Has access to the inside of the container ο 7. Lid according to one of claims 1 to 6, characterized in that that the upper ociieibe (32) on their respective pressure hulls (6) facing - ^ surface parts a recess (46) sur recording of a horizontal, for radial imprinting of the pressure hull has a certain wind ", 3. Lid according to claim 6, characterized in that the central one at the level of the contact surface of two discs (30, 32) Shaft (42) has an extension (43) in which vertically acting "winds" (44) are used to lift the upper disc body (32) and housed for tearing the Llörtelverbindungen (41) are. 9ο lid according to one of claims 1 to 8, characterized in that that the Yerschlußstück (8) with an underside sealing cover (34) is provided which can be or is connected to the sealing lining (2) of the barrel body (1). BATH ORIGINAL 109833/0889 -Π ίθο Lid according to claim 9, characterized in that the sealing lining is integral with the lower disc (18) and the fitting body (1) can be or is connected to a cylindrical extension (21) of the lining (23). 109833/0889