FR2642138A3 - Improved connection for welding - Google Patents
Improved connection for welding Download PDFInfo
- Publication number
- FR2642138A3 FR2642138A3 FR8901083A FR8901083A FR2642138A3 FR 2642138 A3 FR2642138 A3 FR 2642138A3 FR 8901083 A FR8901083 A FR 8901083A FR 8901083 A FR8901083 A FR 8901083A FR 2642138 A3 FR2642138 A3 FR 2642138A3
- Authority
- FR
- France
- Prior art keywords
- piece
- fitting
- smooth
- threaded
- bearing face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
Abstract
Description
L'invention a pour objet un raccord à souder perfec tionné. The subject of the invention is a perfected welding connection.
L'invention trouve son application particulière pour l'équipement de tuyauteries dans le cadre de l'industrie agroalimentaire, pharmaceutique, cosmetologique, chimique, et toutes industries nécessitant des conditions d'environnement aseptisé. The invention finds its particular application for the fitting of piping in the context of the food, pharmaceutical, cosmetological, chemical industry and all industries requiring sanitary environment conditions.
Selon l'art antérieur, on utilise des raccords de ce type commercialisés par exemple sous la réf érence SMS illustré figure I. Un tel raccord comprend une pièce filetée à souder (1) un écrou cannelé (2), un collet ou pièce lisse a souder (3) et un joint de raccord (4) profilé en L inséré entre les pièces (1 > et (3) précitées. Ainsi qu'il apparait sur cette figure, la pi*- ce filetée (1) comprend sur sa face d'appui une rainure circulaire axiale (1.1) autorisant le centrage et engagement du joint (4), le profil de la face d'appui (1.2 > étant rectiligne dans un même plan perpendiculaire a l'axe longitudinal du raccord.La pièce lisse à souder (3 > présente une portée périphérique t3.1) de diamètre (dl) inférieur à celui (d2 > de la pièce filetée a souder et la face avant (3.2) vient en appui contre le joint. According to the prior art, fittings of this type are used, marketed for example under the SMS reference illustrated in FIG. I. Such a fitting comprises a threaded piece to be welded (1) a fluted nut (2), a collar or smooth piece a weld (3) and an L-shaped connection joint (4) inserted between the parts (1> and (3) above. As shown in this figure, the piece * - this threaded (1) has on its face support an axial circular groove (1.1) allowing the centering and engagement of the seal (4), the profile of the support face (1.2> being straight in the same plane perpendicular to the longitudinal axis of the fitting. to be welded (3> has a peripheral surface t3.1) of diameter (dl) smaller than that (d2> of the threaded part to be welded and the front face (3.2) comes to bear against the joint.
Dans cette mise en oeuvre, il nsy a aucun contact des pièces (1) et (3) entre elles. De part et d'autre du raccord ainsi réalisé est engagé un élément de tuyauterie (T > . Une telle construction qui est exploitée présente néanmoins certains inconvénients.In this implementation, there is no contact of the parts (1) and (3) therebetween. On either side of the connection thus produced is engaged a pipe element (T>. Such a construction which is exploited nevertheless has certain drawbacks.
Lors du serrage du raccord après vissage de la bague écrou (2), il se produit un effet d'écrasement du joint qui a tendance à se déformer en débouchant intérieurement dans lral*- sage intérieur du raccord ainsi constitué. L'écrasement trop fort du joint illustré en traits pointillés peut amener à une détérioration de celui-ci et pour éviter des fuites, on a tendance à exercer un effort de serrage encore plus important en comprimant encore plus le joint. Le joint n'assure plus sa fonction et se détériore progressivement. En pratique si l'opérateur observe l'apparition d'une fuite, il ne pense pas pour autant que celle-ci résulte d'une détérioration du joint mais d'une insuffisance de serrage entrainant l'opération correspondante. When tightening the connection after screwing the nut ring (2), there is a crushing effect on the seal which tends to deform by opening internally into the lral * - inside of the connection thus formed. The too strong crushing of the seal illustrated in dotted lines can lead to a deterioration thereof and to avoid leaks, there is a tendency to exert an even greater clamping force by compressing the seal even more. The seal no longer performs its function and gradually deteriorates. In practice if the operator observes the appearance of a leak, he does not think that it results from a deterioration of the seal but from insufficient tightness causing the corresponding operation.
L'objet de l'invention vise donc à remédier aux incon vénients précités. The object of the invention therefore aims to remedy the aforementioned drawbacks.
Selon une première caractéristique de l'invention, le raccord du type comprenant une pièce filetée à souder, une pièce lisse à souder, un écrou de serrage, un joint de raccord profilé en L dispos centré dans une rainure formée sur la face d'appui de ladite pièce filetée est remarquable en ce que la face d'appui présente au-delà de la rainure une livre en débordement extérieur par rapport à la partie inférieure de la face d'appui dans un plan déporté, ladite livre pouvant venir en contact avec la portée périphérique en regard de la pièce lisse à souder lors du serrage et accouplement des pièces constitutives du raccord. According to a first characteristic of the invention, the connector of the type comprising a threaded piece to be welded, a smooth piece to be welded, a clamping nut, an L-shaped connector joint disposed centered in a groove formed on the bearing face. of said threaded part is remarkable in that the bearing face has, beyond the groove, a book projecting outside with respect to the lower part of the bearing face in an offset plane, said book being able to come into contact with the peripheral bearing opposite the smooth part to be welded during tightening and coupling of the constituent parts of the fitting.
Selon une autre caractéristique, les diamètres des portées en regard de la pièce filetée et de la pièce lisse à souder sont égaux et en ce que leur mise en place avant serrage du raccord lisse laisse apparaitre un espace limité de quelques dixièmes de millimètres et de préférence dans une fourchette de 2 à 5 dizièmes de millimètres correspondant à l'épaisseur limitée et réduite d'écrasement du joint. According to another characteristic, the diameters of the bearing surfaces facing the threaded part and the smooth part to be welded are equal and in that their placement before tightening the smooth connector leaves a limited space of a few tenths of a millimeter appear and preferably in a range of 2 to 5 tenths of a millimeter corresponding to the limited and reduced thickness of crushing of the joint.
Ces caractéristiques et d'autres encore ressortiront bien de la suite de la description. These characteristics and others will emerge clearly from the following description.
Pour fixer l'objet de l'invention d'une manière non limitative illustrée aux figures du dessin où
- La figure 1 est une vue d'un raccord à souder selon l'art antérieur en vue en coupe longitudinale.To fix the subject of the invention in a nonlimiting manner illustrated in the figures of the drawing where
- Figure 1 is a view of a weld fitting according to the prior art in longitudinal section view.
- La figure 2 est une vue en coupe longitudinale d'un raccord perfectionné selon l'invention avant serrage. - Figure 2 is a longitudinal sectional view of an improved connector according to the invention before tightening.
- La figure 3 est une vue en coupe du raccord selon la figure 2 en position d'accouplement. - Figure 3 is a sectional view of the connector according to Figure 2 in the coupling position.
Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant d'une manière non limitative illustrée aux figures du dessin. In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in the figures of the drawing.
La pièce filetée (I > ê souder présente sur sa face d'appui (1.2) dans un plan extérieur à la rainure < 1.1) circulaire de réception du joint une livre (1.3) profilée en déborde- ment extérieur par rapport à la partie ou zone inférieure (1.4) de ladite face d'appui, et donc dans un plan déporté vers l'avant. La livre ainsi réalisée peut Etre obtenue sous forme d'une bordure méplate circulaire pour assurer et conserver le maintien du joint de raccord (4 > . Il y a lieu de noter que le diamètre (d3) de la portée périphérique (3.1) de la pièce lisse est sensiblement égal au diamètre (d4) à fond de filet de la pièce filetée.Lors de la mise en place des pièces constitutives du raccord un espace (e) infime de quelques dixièmes de millimètres est établi entre la lèvre (1.3) précitée de la pièce fi letée et la portée en regard de la pièce lisse. Avantageusement, cet espace est de l'ordre de 2 à 5 dixièmes de millimètres et de préférence 3. The threaded part (I> ê weld has on its support face (1.2) in a plane outside the groove <1.1) circular receiving the joint a pound (1.3) profiled in overflow outside relative to the part or lower zone (1.4) of said bearing face, and therefore in a plane offset forward. The book thus produced can be obtained in the form of a circular flat edge to ensure and maintain the maintenance of the connection joint (4>. It should be noted that the diameter (d3) of the peripheral surface (3.1) of the smooth part is substantially equal to the diameter (d4) at the bottom of the thread of the threaded part. When fitting the component parts of the fitting, a space (e) of a few tenths of a millimeter is established between the aforementioned lip (1.3) of the threaded part and the bearing face of the smooth part. Advantageously, this space is of the order of 2 to 5 tenths of a millimeter and preferably 3.
Lors du serrage du raccord par l'actionnement de la bague écrou, la livre vient en contact avec la partie en regard de la pièce lisse. Le joint de raccord est alors faiblement comprimé et assure la seule fonction d'étanchéité. La limitation de l'effort de serrage est assur#e par le contact physique des pièces filetée et lisse. When tightening the fitting by actuating the nut ring, the book comes into contact with the part opposite the smooth part. The connection joint is then slightly compressed and provides the sole sealing function. The clamping force is limited by the physical contact of the threaded and smooth parts.
Un premier avantage de l'invention réside dans le fait qu'il n'y a pas de déterioration du joint par des efforts de serrage intempestifs. S'il y a fuite, c'est que réellement le joint est abimé et qu'il doit donc entre changé On facilite de plus la maintenance et I 'entretien des raccords. A first advantage of the invention lies in the fact that there is no deterioration of the joint by untimely clamping forces. If there is a leak, it is because the seal is actually damaged and must therefore be changed. It also facilitates the maintenance and upkeep of the fittings.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8901083A FR2642138B3 (en) | 1989-01-20 | 1989-01-20 | IMPROVED WELDING FITTING |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8901083A FR2642138B3 (en) | 1989-01-20 | 1989-01-20 | IMPROVED WELDING FITTING |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2642138A3 true FR2642138A3 (en) | 1990-07-27 |
FR2642138B3 FR2642138B3 (en) | 1991-01-11 |
Family
ID=9378217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8901083A Expired - Lifetime FR2642138B3 (en) | 1989-01-20 | 1989-01-20 | IMPROVED WELDING FITTING |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2642138B3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2676523A1 (en) * | 1991-05-14 | 1992-11-20 | Electricite De France | Device for leaktight coupling of two coaxial assemblies and application of this device to the leaktight coupling of a valve body and a sealing cup (seal-containing pot) and to the sealed coupling of two pipes |
DE4201535A1 (en) * | 1992-01-22 | 1993-07-29 | Apv Rosista Gmbh | Flange coupling with aseptic region and elastic seal - has shaped seal seating to compress seal for flush alignment with pipe walls. |
EP0763687A1 (en) * | 1995-09-18 | 1997-03-19 | Siersema Komponenten Service B.V. | Threaded coupling |
FR2773866A1 (en) | 1998-01-21 | 1999-07-23 | Soc D Diffusion De Materiel Eu | IMPROVED WELDING FITTING |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2342422A (en) * | 1942-05-05 | 1944-02-22 | Walworth Patents Inc | High pressure joint |
GB588987A (en) * | 1945-03-13 | 1947-06-09 | Edwin Danks And Company Oldbur | Improvements in or relating to fluid-tight bolted joints |
-
1989
- 1989-01-20 FR FR8901083A patent/FR2642138B3/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2342422A (en) * | 1942-05-05 | 1944-02-22 | Walworth Patents Inc | High pressure joint |
GB588987A (en) * | 1945-03-13 | 1947-06-09 | Edwin Danks And Company Oldbur | Improvements in or relating to fluid-tight bolted joints |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2676523A1 (en) * | 1991-05-14 | 1992-11-20 | Electricite De France | Device for leaktight coupling of two coaxial assemblies and application of this device to the leaktight coupling of a valve body and a sealing cup (seal-containing pot) and to the sealed coupling of two pipes |
DE4201535A1 (en) * | 1992-01-22 | 1993-07-29 | Apv Rosista Gmbh | Flange coupling with aseptic region and elastic seal - has shaped seal seating to compress seal for flush alignment with pipe walls. |
EP0763687A1 (en) * | 1995-09-18 | 1997-03-19 | Siersema Komponenten Service B.V. | Threaded coupling |
FR2773866A1 (en) | 1998-01-21 | 1999-07-23 | Soc D Diffusion De Materiel Eu | IMPROVED WELDING FITTING |
EP0931967A2 (en) | 1998-01-21 | 1999-07-28 | Société de Diffusion de Materiel Europeen | Weldable connecting element |
EP0931967A3 (en) * | 1998-01-21 | 1999-09-22 | Société de Diffusion de Materiel Europeen | Weldable connecting element |
Also Published As
Publication number | Publication date |
---|---|
FR2642138B3 (en) | 1991-01-11 |
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