LU86579A1 - METHOD FOR MANUFACTURING A SEAL AND A SEALED SEAL COVER AND A SEAL SEAL THUS OBTAINED - Google Patents

Description

4 SL-3942 8r 'j »* 7" Λ grand-duchy of Luxembourg Ô 0 /% # Mister Minister 1 * Γ ^ ϊ du ier-Tas.rJS> re .2S> fi6; de ΓΕοοηοΠϋβ and Classes Motennes = ^ Intellectual Property Seniee

liter delivered LUXEMBOURG

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Invention Patent Application _____________ f ........................................... .................................................. .................................._............... .......... (1) I. Request 2.1 ..... Center ..... Ælgfcafe Nucléaire ..rite JSol .. (C ^ s ^ r ..... Soeretang-200 ; r-2400-Mol— <2 "................ Belgium_____________2) Ateliers de ..... CQnsÉzuctd.cms .... ^ le.ctrlques .... from ... Chaxleroi -.......

(ACEC), avenue Llouâ George. 7 + 1Q5Q \ .. Bruxellesf ...... Belgium · .-------------------------- --------------- ÂS ^ resmtés .... p.ar ... £ M.iiegers ^ JÎ ... JEJr ^ Ereifling3 £ t .-- Ing ^ aoiîsei 1s en -proprrinâ * ··? 1 3> .46..rue..âM Cimetière ^ ...... Luxembourg ^ —egissant ~ en ~ -çualité ~ de sa ndatairee ------------- deposefnt) ce _. ............ September 12 nineteen thousand .cent ^ cn ^ atre ^ sdn.c ± .. £ ix .------------------ -------- (4.) at ..2.5 ................ hours, at the Ministry of the Economy and the Middle Classes, in Luxembourg: 1. the present request for obtaining a patent of invention concerning: "Manufacturing process â * .un.joint ~ and ~ d.Um-covers ^ joint ~ souâês-étaiîekes (-1 and joint ..tight, ai nsi obtun ~ --------------------------------------— 2. description in language ... ................. French ................................ .......... of the invention in triplicate; 3. five ............................. .................. drawing plates, in triplicate; 4. receipt of the fees paid to the Luxembourg Registration Office, on September 10 ~ 29B6 ~; 5. the delegation of power, dated ...................................------ ---------------------------------------- the ------ ------------------------------------ i 6. the successor document (authorization); declaring) assuming responsibility for this declaration, that the inventor (s) is (are): (6) 21 ...... Stéphane deBrurburef..482.TranilaanfI960 Sterreheek? -Belgium ---- --------? J ...... Raymond Suinen, 97 rue âuJîQria, ...... 6100..Mont ^ sur ^ Marcbiennet -Belgique --------- 3) André Simon, 9 rue 'de Waitaux, 6208 Les-Bons ~ Vîllersr Belgium_________________ 4) Jules Durieux, 20 ruelle de Thuin, 6558 Lobbes ^ Belgium -.-------------- claims (nt) for the above patent application the priority of one (s) request (s) from (7) ___________________________________________________ filed in (8) ___________ — .....

on (9) ------------ = _-------------------------------- ---------------------------------------------------------- -------- under N ° (10) ___________---------------------------------- ---------------------------------------------------------- -------------------------—------------------- ~ - on behalf of (11) ____________—--------------------------------------------- ------------------------------------—------------- -----------------------------: ------------------- elected (elect) domicile for him / her and, if designated, for his / her representative, in Luxembourg - -----------------------— 46 _ rue .. „Du, Giaefcléper I.mœmbnnrg ______________________________________________________________________________ (12) solicitetnt) the issuance of a patent of inveption for the object described and represented in the appendices mentioned above.

with adjournment of this issue until ~ - / S. ,, Æ .... ten ~ hüit ------------------------------------ month. (13). The depositor / agent: _-------------------------------------------- --------------------------------------- - (14) • y Π-Jrocès-verbal deposit

The aforementioned patent application has been filed with the Ministry of the Economy and the Middle Classes. Property Service ImgHë ^^ Üi ^ ïsj ^^ bourg, dated: September 12, 1986 f i \ Pr. The Minister of the Economy and the Middle Classes, ~ at 15 °° ______ hours! | É | p-d.

\ Ir '*' / The head of the intellectual property department, A 68007_Xfo ______ EXPLANATIONS RELATING TO THE DEPOSIT FORM.

(1) if applicable "Application for certificate of addiriûo to the main patent, to main patent application No ............ of ........... - (2) enter the surname, first name, profession.

"Address of the applicant, when this is an individual or corporate name, legal form, address of head office, when the applicant is a legal person - (3) register! ... . s J --- y ·,: I _ _ .... .I * ·. ·. .......... i ·. .'Îl ,,. 11 ,, .. .mrrnn.M mvvvtîr * fta BL-3942 'λ ί Descriptive memorandum filed in support of an application for a patent for invention in Luxembourg for

Method for manufacturing a sealed welded joint and joint cover and sealed joint thus obtained 1) Center d'Etude Nucléaire de Mol (C.E.N.)

Boeretang 200 B - 2400 Mol (Belgium) 2) Charleroi Electric Consuction Workshops (ACEC) avenue Lloyd George 7 B - 1050 Brussels (Belgium) / PROCESS OF MANUFACTURING A SEAL AND A SEALED SEAL COVER AND SEALED GASKET THUS OBTAINED.

‘The present invention relates to a method for manufacturing a welded joint provided with a joint cover sou-j. dice, so as to seal an assembly of two parts subjected to relative movements of small amplitude and to aggressive atmospheres. It also relates to the welded joint provided with a joint cover thus obtained.

In certain applications, it is necessary to assemble two parts which may however be subjected to relative movements of fairly small amplitude, such as thermal expansion, vibration or other movements. Generally, the two parts are assembled by bolting or by another conventional technique and the interface of the two parts thus assembled is covered with a tight but deformable welded joint. In particular in the case of conduits transporting toxic or radioactive materials, it is particularly important that the welded joint is tight for a life as long as 2 g prolonged as possible and to do this, the welded joint is protected by a tight joint cover in turn to allow the. verification of the tightness of said seal.

In known manner, the two parts to be assembled comprise, on the opposite faces to be joined, a metal sheet 25 welded in a leaktight manner to said part and folded so as to be able to resume certain movements. After assembly of the two parts by bolting for example, the 'welding with raised edges, preferably without filler metal, is carried out, of the two folded metal sheets, joined-tives, integral with said parts, using a remote-controlled carriage known per se (see EP-B-0 003 401). The welded joint is then covered with a metal strip or metal sheets juxtaposed so as to form a metal strip, which connects the two parts to be assembled by watertight solder joints.

However, it is generally difficult to make the sealed weld of the joint cover on the parts to be assembled, since it is a corner weld 2 with a filler metal. The difference in thickness between the metal sheet and the corresponding parts to be assembled only increases the difficulties in obtaining a tight solder joint. Furthermore, depending on the 5 dimensions of the parts to be assembled and according to their arrangement in a more complex device, it may prove necessary to carry out a ceiling welding operation. In addition, this operation is difficult to automate and can only be carried out with the aid of a remote-controlled carriage which must ensure good contact between the elements to be welded together and produce a bead which does not deviate significantly from the route. planned.

An object of the present invention is to provide a method of manufacturing a welded joint provided with a welded neck-joint which makes an assembly of two parts sealed subject to relative movements.

A complementary object of the present invention consists in providing a method of the aforementioned type in which the production of the welds, in particular of the joint cover can be carried out automatically and / or remotely controlled, using a welding carriage. known per se.

Another additional object of the present invention is to provide a seal as described above, provided with a joint cover of a new type.

Another object also complementary to the present invention is to provide a seal as described above, provided with a joint cover which is easily removable for maintenance reasons.

According to a first aspect, the method of the aforementioned type 30 in which a deformable waterproof seal is produced by continuous welding with raised edges of two folded metal sheets, using a remote-controlled carriage, is characterized in that said cover welded joint of a deformable joint cover which is sealed in a sealed manner by continuous welding with raised edges, using said remote-controlled carriage.

According to the present invention, the deformable joint cover is advantageously welded without filler metal, preferably by fusion of the metal by arc under an inert atmosphere.

The fact of providing one or more welding steps with raised edges makes it possible to use a remote-controlled carriage 5 of the known type which uses these edges as an adequate guide path "

The method of the invention contributes to the production of better quality weld seals whose sealing is better and more easily ensured than by the methods used until now.

The disadvantages resulting from the welding of the joint cover according to the prior art are thus eliminated. In addition, ceiling welding can be carried out more easily using the known carriage which follows the desired course while allowing good contact between the various elements to be welded together.

It is obvious that before the welding step, the surfaces intended to comprise the weld bead must be prepared in a conventional manner. The various preparation stages can be carried out by the same cart provided with appropriate tools.

According to another aspect of the present invention, the deformable welded waterproof joint is provided with a deformable joint cover secured to the parts assembled by welding with raised edges, the main role of which is to allow the verification of the tightness of said joint.

Thanks to the use of the waterproof seal provided with a joint cover according to the present invention, it is possible to use a remote-controlled welding carriage of known type which uses the raised edges as a guide path. Furthermore, the quality and tightness of a joint thus arranged are significantly improved. In addition, being able to use the same remote-controlled carriage in the manufacture of the joint and the joint cover for welding and the preparation operations improves the efficiency and reduces assembly costs compared to lamination techniques. prior art.

It should also be noted that an assembly 4 by welding with raised edges appreciably facilitates the separation of the welded elements, in the event of maintenance or repairs.

According to a first alternative embodiment, the joint cover 5 consists of a welded metal strip with raised edges on each side, on each time a metal sheet folded in a U shape and made integral with the parts to be assembled by a tight solder joint. .

The metal sheets folded into a U give a certain elasticity or deformability to the joint cover according to the invention, which comprises, in this case, two welds with raised edges arranged laterally, which of course implies an inclination of the welding head of the remote controlled cart.

In accordance with another alternative embodiment, the joint cover consists of two metal sheets folded so as to form a bellows, which are each made integral with the parts to be assembled by a leaktight weld joint and which are welded together with straight edges. -20 ves according to the method of the invention. It is noted that in this case, the two metal sheets in bellows can be retracted each on its side to allow the welding operation of the joint itself and then be deployed at least partially to be welded together 25 tightly. In this embodiment, the arrangement of the joint cover requires only a single welded joint with raised edges.

It is also possible to provide other embodiments of a leaktight seal provided with a joint cover, in which the joint cover consists of a metal strip held by clipping between two flexible uprights secured to the parts to be assembled. and welded with raised edges to said uprights. In this case also, two welded joints with raised edges are provided.

The invention is described in more detail below with the support of the appended figures in which: - Figure 1 relates to a first embodiment according to the invention? 5 - Figure 2 relates to a bellows joint cover, in the retracted state; - Figure 3 relates to the bellows joint cover, in the deployed and welded state; 5 - Figures 4 and 5 relate to other embodiments according to the invention; and - Figures 6 and 7 relate to arrangements of parts assembled in a crown ",

In the figures, identical references represent 10-identical or similar elements.

In Figure 1, there is shown schematically · an assembly of two parts 1 and 3 equipped with a deformable waterproof welded joint 5. Conventionally, two metal sheets 7, 9 folded in U are made solidai-15 res of parts 1 and 3, respectively, by sealed weld seams 11 and 13. The two metal sheets 7 and 9 are welded with raised edges at 15 using a carriage known per se consisting of a frame 17 which can serve as a door -torch or knife holder and rollers 18 2 0 which by pinching the ends of the folded sheets 7 and 9 ensure the advancement of the carriage (shown in broken lines). The deformable joint thus produced is protected by a joint cover 19 which consists of a metal strip welded on either side on metallized sheets folded so as to have two parallel branches 21, 23, respectively, which are joined to the corresponding parts 1 and 3 by leaktight solder joints 2 5 and 2 7. The joint cover 19 is welded with raised edges on the sheets in parallel branches along the weld beads 29 and 31 using of a carriage * 17 'identical or analogous to carriage 17.

It is easy to see that the assembly thus produced can undergo relative movements while maintaining the required seal.

FIG. 2 shows another embodiment according to the invention, in which the joint cover consists of two metal sheets in the form of bellows 41 and 43 which are tightly fixed, 6 respectively, to the parts 1 and 3, along the weld beads 45 and 47. In this way, the weld 15 can first be produced.

Then (FIG. 3) the 5 sheets of bellows 41 and 43 are allowed to be deployed in order to be able to produce the welded joint with raised edges 49. This thus results in the presence of a joint provided with a flexible joint cover which requires only one additional weld.

In Figure 4, there is shown schematically another embodiment of a deformable seal. Parts 1 and 3 assembled in a conventional manner are equipped with a deformable welded seal 15 consisting of two. metal sheets 7 and 9 folded so as to be able to resume certain relative movements and 15 made integral with parts 1 and 3 by watertight welds 11 and 13. In this case, the joint cover consists of a metal strip 51 held in position by clip -sage 53 and 55 between two flexible uprights 57 and 59 integral, respectively, with parts 1 and 3, by means of leaktight welds 61 and 63 which can be produced easily before assembly of said parts 1 and 3. The metal strip 51 is welded to edges raised using a carriage 17 provided with a welding torch 20 and guide rollers 18 which adapt to a guide and rolling path in a groove made in parts 1 and 3. The welding torch 20 is intended for welding the joint 15 and the welding torch 20 'which is identical or similar is intended for welding with raised edges of the joints 65 and 67.

In FIG. 5, there is shown schematically an arrangement similar to that of FIG. 4 in which the flexible uprights 57 and 59 form a single piece with the U-shaped sheets 7 and 9.

FIG. 6 represents an arrangement used when the parts 1 and 3 are arranged around an axis 71 to form a crown. In this arrangement, two metal sheets 73 and 75 in the form of a U are preassembled by a joint 77 to form a joint cover 79 7 in the form of a crown. The joint cover 79 is inserted between two metallic risers 81 and 83 in the shape of an L secured to the edges "of parts 1 and 3. To allow the mounting of the joint cover 79 in the form of a crown inside the the larger crown formed by parts 1 and 3 and the metal risers 81 and 83, a portion of the joint cover 79 must be able to slide between the metal risers 81 and 83 over a depth of insertion x at less equal to the radial dimension 10 of the joint cover 79. During assembly, the joint cover 79 is first introduced at an angle between the metal extensions 81 and 83 on a portion of the crown formed by parts 1 and 3 After pressing in the joint cover 79 with a value at least equal to its radial size 15 e, it is possible to present the rest of the periphery of the joint cover 79 opposite the metal extensions 81 * and 83 to complete its insertion on any the perimeter and position the joint cover 79 so that its ends ities come almost flush with the ends of the metal extensions 20 and 83 to allow welding 85 and 87 to be carried out after adequate preparation.

FIG. 7 is a variant of the arrangement presented in FIG. 6. This arrangement is suitable for an arrangement of parts 1 and 3 in the form of a crown around an axis 71. In this arrangement a joint cover 79 in the form of crown is formed of a metal sheet shaped so that two flanges 91 and 93 are inserted between two metal risers 81 and 83 secured to parts 1 and 3. To allow the insertion of the joint cover 89, it is necessary that the driving depth x is at least equal to the radial size e of the joint cover 89.

It is obvious that the present invention is not limited to the embodiments shown but that it extends to the scope defined by the claims.

Claims (12)

8 1. Method of manufacturing a welded joint provided with a welded joint cover, so as to seal an assembly of two parts subjected to relative movements of small amplitude and to aggressive atmospheres, in which one realizes a waterproof joint deformable by continuous welding with raised edges of two folded metal sheets, using a remote-controlled carriage, characterized in that said welded joint is covered with a deformable joint cover 10 which is welded tightly by continuous welding with raised edges. 2. Method according to claim 1 characterized in that the deformable joint cover is welded in a leaktight manner, continuously, with raised edges using said remote-controlled cart or using a similar carriage. 3. Method according to claim 1 characterized in that the deformable joint cover is welded without filler metal, preferably by melting the metal under an inert atmosphere. 4. Method according to one of claims 1 or 2 characterized in that provision is made for welding preparation of the raised edges. 5. Deformable welded seal characterized in that it is provided with a deformable joint cover secured to the assembly by welding with raised edges. 6 ·. Deformable welded seal according to claim 5 characterized in that the raised edges of the joint cover serve as a guide for a carriage, preferably remote-controlled, provided with the appropriate tools for preparing and carrying out the welding along the raised edges. * 7. Deformable welded tight seal according to re vendication 5 or 6 characterized in that the joint cover consists of a metal strip (19) welded with raised edges on each side (2 9, 31), on each sheet 35 metal folded so as to present two parallel branches (2 1, 2 3) and made integral with the parts to be assembled (1, 3) by a tight solder joint (2 5, 2 7). 8. deformable welded tight seal according to claim 5 or 6 characterized in that the joint cover consists of two folded metal sheets (41, 43) so as to form a bellows, which are each made integral with the parts to be assembled (1 , 3) by a sealed welding joint (45, 47) and which are welded together with raised edges at (49). 9. deformable welded seal according to claim 5 or 6 characterized in that the joint cover consists of a metal strip (51) held by clip- ^ q wise along the bosses (53, 55) provided at the two flexible uprights of correspondingly between two flexible uprights (57, 59) integral with the parts to be assembled (1, 3) and welded with raised edges to said uprights (57, -59). ^ 10. Sealed weldable joint deformable according to re vendication 9 characterized in that the flexible uprights (57, 59) are one piece with the metal sheets (7, 9) of the joint (15). 11. Deformable welded tight seal according to claim 2 or claim 5, characterized in that a joint cover (79) in the form of a crown is formed by two sheets (83 and 75) of U-shaped cross section preassembled by a seal. (77) and whose radial size allows the insertion of the joint cover (79) between two metal risers „(81, 83) secured to the parts (1 and 3) assembled in l 5 crown popr perform the welds (85 and 87) after adequate preparation. 12. Deformable welded tight seal according to claim 5 or 6 characterized in that a 2Q joint cover (79) in the form of a crown is formed of a metal sheet shaped so that two flanges (91, 93) of this sheet is inserted between two metal extensions (81, 83) secured to the edges of the parts (1 and 3) assembled in a ring to make welds (85 and 87) 22 after adequate preparation.