DE2021117A1 - Device for the installation of sealing rings, especially for radioactive containers - Google Patents

Description

Patent Attorneys Dlpl .. (no. Π. Π Π ETZ sen. Dlpl-.V; -. ! ■ ;. LA.V.PRECHT

Dh-Ing. H. υ £ I- τ 2 Jr.
β Munich 22,

Commissariat ä! 'Energie Atomique, Paris (France)

Device for installing sealing rings, in particular for radioactive containers

The invention relates to methods and devices or tools for the installation of sealing rings and the like, and in particular methods and devices of this type for containers for radioactive substances for the purpose of radiation protection.

It is known (from French Pat. 1 k9k 867 and 1JOO 165) to use a ring with articulated elements around it for the safe installation of a glove or sleeve in a service channel in the wall of a container for radioactive substances into the channel in which the sleeve is to be installed, first in a contracted shape and then in an expanded shape

410- (b 3655.3) Bgn-r (7)

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brings, in which he is supported with the corresponding end of the sleeve against the wall of the channel, with a Sealing ring is inserted.

For these operations is known as an aid a device or a tool with two directions of movement, one axial and one radial, proposed been «

In the event that a sleeve is already there and needs to be replaced by a new one, the introduction takes place this new sleeve is known to be in such a way that you push the old one into the interior of the container, whereby the tightness preserved.

So much for the state of the art. It should be noted that the known devices of this type are particularly disadvantageous have that in the channel described above, the structure consisting of the ring and the seal in general protrudes towards the interior of the channel, so that machines or devices inserted into the interior of the channel must be able to get stuck on him, especially about a remote control linkage. Such sticking is particularly dangerous as the ring can pop out, instantly disrupting the seal is and contamination is taking place.

In addition, the tool previously used to install a ring resulted in a radial movement which one could widen the ring by means of small coupling rods, which were operated by transmission rods, which originated from a control device, which is on the accessible side of the pierced wall. at

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very thick walls, these poles were very long and as a result the twisting of the rods bi the rotation in their Effect very uncertain. Therefore, this tool was used when ejecting an existing ring and replacing it with a new one Rinß is not robust enough.

The invention makes it possible to avoid these disadvantages thanks to a powerful and handy tool with which you can also bring the ring into the protection area of a protective projection.

The invention relates to a device for inserting an expandable ring into one through the wall of a Container leading channel, up to one of the channel at its inner end surrounding collar, and to expand of the ring and to press it against the collar.

It is characterized by the fact that it contains)

a) a tubular housing that is temporarily in certain Position inside the duct is attached,

b) two tubular components inside the housing are arranged concentrically one inside the other and can be displaced by means of two drives, one of which is the two components at the same time and axially and the other axially displaces one of the components relative to the other,

c) a number of grippers carried by one of the tubular components and by the relative axial movement of the both components are moved and pressed in a substantially radial direction.

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The invention also includes the main ones Device certain other devices which can be used with advantage at the same time and which are below in the discussed individually, especially a second device (for devices or tools with which the sleeve and the above-mentioned expandable ring and all other devices to be introduced there and inserted into their positions, especially when introducing very thick and long parts, which are quite causing great forces), which consists in such devices in the form of two, in particular tubular and coaxial components that can be displaced with one another or with respect to one another to be introduced into the channel, together with grippers that are attached to the ends of these components and through whose relative displacement are moved radially.

The invention particularly resides in certain types of application (in particular for the installation of fastening rings and sealing rings for operating protective sleeves in Containers for radioactive substances) as well as certain versions of the device mentioned.

An embodiment of the invention is shown in the drawing. Show it:

Fig. 1 is an axial longitudinal section through the wall of a Container for radioactive substances and through a device with which a sleeve next to it Fastening and sealing device is introduced?

Figure 2 is an end view of the device (from the left in Figure 1);

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Fig. 3 - 5 axial longitudinal sections through some components modified form}

6 shows an expandable ring of the known type mentioned at the beginning.

According to the invention, in particular according to the particularly recommended design and application variants of its various parts, if in the wall of a radiation-contaminated room such. B. the one shown in Fig. 1 at the end of a channel 2 passing through this wall a soft sleeve 3 by means of an expandable ring A, which consists of hinged parts k _t 5 (Fig * 6) and which the corresponding end of the sleeve below Interposition of a suitable sealing ring 6 is intended to press against a corresponding, in particular cylindrical, support surface, proceed approximately as follows!

One proceeds so that this support surface 7, the z. B. can be formed by a collar or sheathing ring 8 attached to the wall 1 at the exit of the channel 2, arranged so that they are at the end of the channel facing the container interior radially outward behind the circumference of the channel resigns; so this arrangement gives the sealing ring A, d. H. for fastening and sealing the Sleeve 3 serving device, a protection against any catching of devices, remote control rods or other tools inserted through the channel.

So is z. B. in Fig. K the collar 8 is designed so that its support surface 7 by a certain amount h radially outward behind a fixed to the wall 1 attachment surface 9

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step back · The ring A, once it is in its place, is through the shoulder 10, which the Support surface 7 separates from the attachment surface 9, protected. In other words: the inner diameter of the ring A is larger than that of the channel 2 or the attachment surface 9, and this helps prevent getting stuck.

To insert a sleeve 3 with the ring k and the sealing ring 6 and to insert such a sleeve and f to push out an existing sleeve, any device can be used which is suitable for joint rings like the ring 11 shown in FIG. 6 - such rings, as stated at the beginning, known - is suitable. However, if the channel 2 is very wide and long and therefore very large adjustment forces are required, a device of the type described below is recommended.

This device described in Figures 1-5 has two tubular, coaxial, particularly strong components, which can be moved together or against each other. One of them carries the actual claws that The ring. A should grab and which can be moved radially by axial relative movement of the two tubular components.

As can be seen, one can on the one hand, with certain Position of the two components, one of them against the move others and so move the grippers from their inner position to their outer position or vice versa and on the other hand, when the two components are in an external position, they both move axially together, that is to say without changing their relative axial position, and thus an existing sleeve and put the new sleeve in his behind the school

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Ter 10 bring protected position, as in the following in more detail is described.

In any case, the kinematic means required for these various movements can be achieved with great Accuracy through backlash-free means such as B. screw and mother with drive by handwheels that are easily recognizable in their positions and can be operated "blindly". Indeed, the operator cannot see either of the above-mentioned claws or the ring; so he must from Inferred from the position of the belt wheels on the position of this gripper from the outset.

The whole thing is z. B. achieved in the following manner shown in the drawings:

The device includes a tubular outer "housing with fasteners with which it is very precisely in can be attached to the wall of the room.

This housing is shown at 12. His end 13 rests against a shoulder of the attachment surface 9. Centering stops 1U can also be provided.

The housing is in this position by means of a clamping ring 15 attached; this belongs to a sheet metal 16 fixed to the wall. The housing is closed off by a base 17. .

Inside the tubular housing so designed and fixed are the two above-mentioned tubulars Components 18, 19 arranged.

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The tubular component 18, here the outer of the two, is firmly connected at its end remote from the container interior to a sheet metal 26, which in turn, for. B. is firmly connected by screws 251 to a housing 21 which contains the drive for the second tubular component 19. A hub 22 is attached to this housing 21, which is provided with a thread and onto which a nut 23 is screwed, which is firmly connected to a handwheel Zk - referred to below as a vertical handwheel - and is rotatably mounted in the base 17.

Rotation of the handwheel Zk causes axial displacement of the tubular component 18 and the other components interacting with them, in particular the second tubular component. Of course, it is ensured that the tubular component 18 cannot rotate.

The second tubular component 19 is provided at its end remote from the container interior with a base Z6 , to which a nut 27 is fastened, in which a threaded spindle 28 runs, which is driven from the housing 21.

This threaded spindle 28 is driven by a second handwheel - hereinafter referred to as the "horizontal ¹ * handwheel - which is attached to a shaft 30 perpendicular to the threaded spindle and drives the threaded spindle through a pair of bevel gears 31, 32. The shaft 30 passes through an elongated opening k8 of the housing 12 and prevents rotation of the tubular component 18. Likewise, rotation of the tubular component 19 is prevented by a stop 43 which slides into a slot kk.

Rotation of the horizontal handwheel 29 thus causes

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axial displacement of the second component 19 relative to the first component 18.

The second tubular component 19 finally comes on at its end facing the interior of the container a number of holding pieces 49 »to which the grippers are hinged, which should grip the stretchable ring A, in particular whose joints 11 (Fig, 6) should grip.

These grippers have z. B. for each joint 11 ■

nen gripping head 30 carried by articulated rods 34,35 which is attached at one end to that gripper head and at its other end to the corresponding holding piece 49 are articulated, the whole acting like a parallelogram.

This parallelogram can be through the axial relative displacement of the two tubular components 18 and 19t, which originates from handwheel 29, deform »

In order for this movement to occur, one of the articulated rods mentioned above is e.g. B. hinged to the outer tubular λ component 18 by a joint rod 36 which is adjustable, e.g. B * is hinged to a holding piece 38 fixed to the component by screws 37 '.

The joint axes are arranged so that by a Relative displacement of the two components 18, 19, the holding head moves substantially radially, d. H. practically without exercise a substantial axial component on ring A.

¹ Ea are so many of these parallelogram-shaped, from the gripping head 33 »the associated articulated rods 34, 35, J6

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and the holding piece 49 existing structure present, such as the ring Λ joints 11 contains - z. B. four such structures in the ring shown in Fig. 6 ·

The holding heads 33 have depressions 39 for receiving the joints 11, ie the ends of the components 4 facing these joints 11, so that the ring A can easily slide into its z. B, can bring the contracted form shown in Fig. K , from which it then in its in Flg. 5 is brought outwardly stretched shape

To fully equip the device still includes a device for supplying compressed air with which the Sleeve 3 is inflated towards the interior of the container; the This is because the sleeve is initially arranged within the channel 2, as shown in FIG. 1 with dashed lines. This device consists, for example, in a bore for the supply of compressed air arranged in the middle of the spindles 22 and 28.

With the help of such devices, a single operation of the two handwheels 2k and 29 can be used to install a soft sleeve or replace a worn sleeve with a new one in the following way:

a) Moving the existing ring from position I to position II up to the edge of the collar 8,

d. H. so that, firstly, free space is created for the introduction of the new sleeve and, secondly, the ejection of the old sleeve is prepared by the new one (Fig. 3) j

b) Installation of the new ring with the new sleeve in the vacated space on the support surface (Fig. h and 5)

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c) Finally, move the newly inserted sleeve in the direction of the inside of the container so that the old sleeves are pushed out of the channel 8 and thrown off, and then moved in the opposite direction, so that the newly introduced sleeve is brought into its correct position behind the protective shoulder 10 (Fig. 5)

These steps are done z. B. on the following Yeiset

In order to carry out step a), one could be satisfied with working with the gripping heads 33 by trying to bring the recesses 39 in front of the corresponding parts of the ring A. But this operation would be extremely difficult. It therefore seems more beneficial to equip the recesses mentioned with caps kl (Fig. 3), which are provided with a driving edge kz , which with all certainty the driving of the ring, the sealing ring and the sleeve existing whole in direction f to position Il.

This operation a) is prepared outside the container, ie the caps U1 are placed on the gripping heads 33, the device standing on a table and the articulated rods Jk , 35 being in the contracted position. When everything is ready, the device is inserted into the channel 2, pushed against the stops 13t \ k and fixed by means of the clamping ring 15; then the necessary handles must be made on the vertical handwheel Zh and the horizontal handwheel 25.

The vertical handwheel is put into the position - it can be noted on its indicator - that the

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Arrival of the · gripper in level I. Then will the horizontal handwheel in the position - this can also be seen on its indicator - brought out corresponds to the stretched position of the grippers, with the Thickness of the caps 41 is to be considered. Then stay just turn the vertical handwheel up to the position to be filled on the Anneiger, which corresponds to position II is equivalent to.

Then the sleeve to be thrown becomes full of security brought to its pre-ejection steepness on the edge of the collar 8. When this operation is done ;, can the gripping heads are drawn together and the device is withdrawn (There is no danger here, because the tightness is ensured by the old one, which is still in its position Keep sleeves up)

The device is used again for operation b) placed on a table, and the caps 4t are removed * Then the hinge rods and theirs are covered Heads in contracted position with the new ring A, this is also pulled together, and surrounds it with the elastic and the hem of the new sleeve 3, wherein this is turned into the interior of the device.

The device is then inserted into channel 2 and fastened there, as described above, and on top the two handwheels are operated in the appropriate manner.

Fig. 4 shows the position of the new ring and the new sleeve at the entry edge of the collar 8 «The ring is at this moment still contracted »You push

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then the device using the vertical handwheel axially forward to move the ring away from the stop! then you turn the horizontal handwheel into the one - on the indicator to be sensedβ - position corresponding to the outermost extension of the ring (without the caps), the ring is brought into the position in this way which it is fixed and pressed tightly against the sleeve. He holds himself in this position thanks to the pressure by appropriately spreading the Grelenkaohsen ^ 5 »^ -6» J * 7 (Fig. 6) is obtained from the axis of Singes.

Then you have to (Fig. 5) by again turning the vertical Handwheel adjusts the axial displacement of the device cause position II (direction f) from position I, so that it pushes away the old sleeve and into the interior of the container throws, and then the device in the opposite Maneuver direction (f ..) and thus the new sleeve and ring in the correct position behind the bring protective shoulder 10.

Compressed air is then introduced through the bore 40 so that the sleeve is turned inside out. -

Then the device is released (clamping ring 15) and expanded »

The advantages of this preparation according to the invention are presented the known are numerous, especially «

Protection of the stretchable ring and its attachment against getting caught by devices or tools that are inserted into the canal and together with the sleeve, should work,

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Control of the axial and radial displacements with great accuracy thanks to the almost backlash-free mechanism with screw and nut,

Thanks to this accuracy ^{B blinds lt} adjustability by simply observing the handwheel positions relative to the display markings,

thanks to the strong design of the device, great Veiafcell forces, which is the case with particularly wide and long canals is required,

substantially radial movement of the gripping heads, so that the ring is pressed in ideally,

therefore maximum security and tightness when replacing an old sleeve with a new one *

The invention is not limited to the modes of execution and application described} it includes rather, all modifications in which the device described above is used, also with other containers as such for radioactive substances. The mechanism for inserting the ring can be driven hydraulically, be pneumatic, electric or otherwise.

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Claims (1)

Claims Device for introducing an expandable ring into a channel leading through the wall of a container, namely up to a collar surrounding the channel at its inner end, and to expand the ring and to its Pressing against the collar, which is indicated by the fact that it contains! a) a tubular housing (i2), which is temporarily in a certain position inside the channel (2) is attached (15), b) two tubular components (18, 19), which are arranged concentrically one inside the other inside the housing (12) and are displaceable by means of two drives (22 - Zk \ 27 - 32), one of which (22 - 2k) the two components ( 18, 19) moves axially and simultaneously and the other (2? To 32) moves one (19) of the components axially relative to the other (18), c) a number of grippers ( 33-38, k9) which are carried by one of the tubular components (19) and moved and pressed in a substantially radial direction by the relative axial movement of the two components (18, 19), 2. Device according to claim 1, characterized in that that the collar (8) surrounding the channel (2) of the container wall has a support surface (?) to which the expandable Ring (Α) is pressed in its fixed position and behind the peripheral wall (9) This channel (2) is set back radially outwards by a shoulder (to) which is 009886/0225 It is sufficient that the inner diameter of the expandable ring (A) in its fixed position is greater than that of the inner wall of the duct and therefore the ring (a) is protected in its fixed position behind the shoulder (1O). 3. Apparatus according to claim 1 and 2, characterized by caps (41 in Fig. 3), which can be placed on the gripping heads (33) in order to eject an existing one in the channel Bring the ring (A) into a pre-eject position before replacing the ring with a new ring. k. Device according to claims 1 - 3, characterized in that the drives of the two components (18, 19.) To be axially displaced concentrically to one another are actuated by two handwheels (2 ^, 29) or other devices of the same purpose and each one screw with nut (22 / 23 $ 27/28) of the components (18, 19). 5. Apparatus according to claim h _f, characterized in that the axial displacement of one (18) of the two mutually concentric components (18, 19) by an axial screw (s4) and one in the bottom (1?) Of the tubular housing (12) mounted nut (23) is effected. 6. Apparatus according to claim 4, characterized in that the axial displacement of the second (19) of the two concentric components (18, 19) is supported by an axial screw (28) and one in the bottom (26) of the second component (19) Mother (27) is effected. 7o device according to claim 6, characterized in that the axial displacement of the second component (19) 009886/0225 causing screw (28) via a bevel gear (31 » 32) is done by a handwheel (29), the shaft of which penetrates the tubular housing (12) in an elongated hole (48). 8. Apparatus according to claim T - 7, characterized in that that the gripping organs are formed by a number of gripping heads (33) attached to one (19) of the tubular Components (18, 19) articulated by articulated rods (34, 35) are in turn on the other (18). of the two components are articulated (36, 37) 9, device according to claim 8, characterized in that the articulated rods (3 ^ y 35) are arranged in the form of parallelograms so that they result in a substantially radial movement of the gripping heads (33) 0098 86/0 225 4t? Blank page