FR2741706A1 - CONNECTION ARRANGEMENT OF TWO PERPENDICULAR TUBES IN PARTICULAR FOR A HEAT EXCHANGER - Google Patents

Abstract

The present invention relates to a connecting arrangement of two perpendicular tubes (1, 2), called the first (1) and second (2) tubes, comprising a connecting part (3, 6) on which the second tube (2) is welded. . The first tube (1) carries a section (5) secured along one of its generatrices and having a cutout (4) for receiving said connecting part (3, 6) and for blocking the second tube (2), this blocking being radial and longitudinal in at least one direction.

Description

CONNECTION ARRANGEMENT OF TWO PERPENDICULAR TUBES

  IN PARTICULAR FOR A HEAT EXCHANGER.

  The present invention relates to an arrangement for connecting two perpendicular tubes, in particular for a heat exchanger. It relates more precisely to a connection arrangement of two perpendicular tubes, called first and second tubes, comprising a connection part on which the second tube is welded. In such a known arrangement commonly used for the production of heat exchangers, the connecting part consists of a metal element comprising on one of its faces a rounded cradle in which is housed the first tube and on its opposite face another rounded cradle15 with a perpendicular axis in which is housed the second tube. Thus set up, the two tubes are welded to the connecting part. Such a connection is therefore rigid and is stressed by the vibrations and the differential thermal expansions to which the tubes are subjected. In the medium term, the weld beads are destroyed, leading to deterioration and possibly drilling of the tubes. The present invention solves this problem by eliminating the welding of the first tube on the connection part and by

  providing a connection arrangement having a certain degree of freedom in movement.

  To do this, in accordance with the invention, the first tube carries a section secured along one of its

  generators and having a cutout for receiving said connecting portion and blocking the second tube, this blocking being radial and longitudinal in at least one direction.

  According to the preferred embodiment of the invention, the radial blocking is achieved by complementary shapes

  of the connecting part and of the cutout and advantageously35 said complementary shapes are dovetailed.

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  According to a first variant, the longitudinal blocking is achieved by a stop bar carried by the part

link.

  Advantageously, in this case, the connecting part consists of a metal part which has a C shape, with on one of its faces, centered on the axis of symmetry of this part, a cradle intended to receive the second tube. and on its branches, cross-section locking parts in dovetail and on the other face of the part, on

the core, said stop bar.

  According to a second variant, the longitudinal blocking is achieved by a rounded shape of the connecting part in the longitudinal direction of the second tube. Advantageously, in this case, the connecting part consists of a metal part which has an O shape, with on one of its faces, centered on the axis of symmetry

  horizontal of this part, a cradle intended to receive the second tube and on its horizontal branches, blocking parts of cross section in dovetail and with 20 on the other face of the part, said rounded shape in an arc of a circle.

  Preferably, the first tube is vertical and load-bearing and the second tube is horizontal and carried.

  The invention also relates to a heat exchanger consisting of a plurality of carrier tubes and perpendicularly carried tubes fixed by means of such a connection arrangement. The invention is described below in more detail with the aid of figures representing only one embodiment.

preferred of the invention.

  Figure 1 is a cross-sectional view along I- I of a first alternative embodiment of the connecting arrangement according to the invention. Figure 2 is a longitudinal sectional view along

II-II of this variant.

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  Figure 3 is a perspective view of the part of

link according to this variant.

  Figure 4 is a cross-sectional view along IV-IV of a second alternative embodiment of the connecting arrangement according to the invention.

  Figure 5 is a longitudinal sectional view along V-V of this variant.

  Figure 6 is a front view of the part of

link according to this variant.

  Figure 7 is a sectional view along VII-VII of the connecting part according to this variant.

  Figure 8 is a view along VIII of the connecting part according to this variant.

  Figure 9 is a perspective view of the part of

link according to this variant.

  Figures 1 to 3 illustrate a first alternative embodiment of the arrangement according to the invention.

  Two perpendicular tubes, a first tube 1, preferably vertical and carrying, and a second tube 2, preferably horizontal and carried, are fixed to each other and are intended to convey a heat transfer fluid. A

  plurality of such fixed tubes preferably form a heat exchanger.

  The connection arrangement comprises a connection part 3 on which the second tube 2 is welded and which is housed in a cutout 4 produced in a profile 5, for example a flat profile, secured, preferably by welding, along one of the generators of the first tube 1. Thanks to the complementary shapes of the part of

  connection 3 and of the cutout 4, the connection part 3 and the second tube 2 welded thereto are blocked radially.

  In addition, a longitudinal blocking is also carried out, in a direction of movement.

  More specifically, according to this alternative embodiment, the connecting part 3 consists of a metal part which has a shape of C, of core 3A and of symmetrical branches 3B

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  and 3C. On one of the faces of this part, centered on the axis of symmetry of this part, is formed a rounded 3D cradle intended to receive the second tube 2. On either side of this 3D cradle in the branches 3B and 3C, are shaped 5 of the locking parts 3B ', 3C' of cross section in dovetail. On the other face of the part, the core 3A has a stop bar 3E extending over the entire length of the core 3A. The establishment of this connection arrangement is carried out either by introducing the connection part 3 into the cutout 4 by sliding then by welding on the surfaces 3B "and 3C" of this part 3 the second tube 2, or by welding the part link 3 on the second tube 2 then in

  engaging the connecting part 3 in the cutout 4 by sliding 15.

  By engagement of the dovetail portions of the branches 3B and 3C in the cutout 4 of the profile 5, which is

  complementary shape, the radial locking of the second tube 2 is obtained. The stop bar 3E ensures the longitudinal locking of the second tube 2, in the direction shown by the arrow 7.

  To obtain a longitudinal blocking of a set of several tubes 1 and 2, the connecting parts 3 are

  alternately mounted, with the stop bar 3E once placed on one side of the tube 1 and another time placed on the other side of the tube 1 and so on.

  A second alternative embodiment is shown in FIGS. 4 to 9.

  Two perpendicular tubes, a first tube 1, preferably vertical and carrying, and a second tube 2, preferably horizontal and carried, are fixed to each other and

  are intended to transport a heat transfer fluid. A plurality of such fixed tubes preferably form a heat exchanger.

  The connection arrangement comprises a connection part 6 on which the second tube 2 is welded and which is housed

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  in a cutout 4 produced in a profile 5, for example a flat profile, secured, preferably by welding, along one of the generatrices of the first tube 1. Thanks to the complementary shapes of the connecting part 6 and the cutout 4 , the connecting part 6 and the second tube 2 welded thereon are blocked radially.

  In addition, a longitudinal blocking is also achieved, in both directions of movement, this time.

  More specifically, according to this alternative embodiment, the connecting part 6 consists of a metal part which, seen from the front as visible in FIG. 6, has an O shape, vertical branches 6A and 6B and horizontal branches 6C and 6D. On one of the faces of this part, centered on the horizontal axis of symmetry of this part, is15 a rounded cradle 6E designed to receive the second tube 2. Above this cradle 6E for the upper horizontal branch 6C and above below this cradle 6E for the lower horizontal branch 6D, there are shaped cross section locking parts in dovetail. On the other face of the part, it has a rounded shape in an arc centered on the longitudinal axis of the first tube 1. The establishment of this connection arrangement is achieved by introducing the connection part 6 into cutting 4 by sliding and then welding on this part

3 the second tube 2.

  By engagement of the dovetail portions of the branches 6C and 6D in the cutout 4 of the profile 5, which is of complementary shape, the radial locking of the second tube 2 is obtained. The circular arc shape ensures the longitudinal locking of the second tube 2, in both directions

  represented by the double arrow 8.

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Claims (9)

  1) Connection arrangement of two perpendicular tubes (1, 2), called first (1) and second (2) tubes, comprising a connecting part (3, 6) on which the second tube (2) is welded, characterized in that the first tube (1) carries a profile (5) secured along one of its generatrices and having a cutout (4) for receiving10 said connecting part (3, 6) and for blocking the second tube (2 ), this blocking being radial and longitudinal in at least one direction. 2) Arrangement according to claim 1, characterized in that the radial blocking is achieved by forms   complementary to the connecting part (3, 6) and the cutout (4).   3) Arrangement according to claim 2, characterized in that said complementary shapes are in the tail   aronde.20 4) Arrangement according to one of the preceding claims, characterized in that the longitudinal blocking   is made by a stop bar (3E) carried by the connecting part (3). 5) Arrangement according to one of claims 1 to 3,   characterized in that the longitudinal locking is achieved by a rounded shape of the connecting part (6) in the longitudinal direction of the second tube (2). 6) Arrangement according to claim 4, characterized in that the connecting part (3) consists of a metal part which has a C shape, with on one of its faces, centered on the axis of symmetry of this part (3), a cradle (3D) intended to receive the second tube (2) and on its branches (3B, 3C) section blocking parts   transverse in dovetail and on the other face of the part (3), on the core (3A), said stop bar (3E). 7 2741706   7) Arrangement according to claim 5, characterized in that the connecting part (6) consists of a metal part which has an O shape, with on one of its faces, centered on the horizontal axis of symmetry of this piece, a 5 cradle (6E) intended to receive the second tube (2) and on its horizontal branches (6C, 6D), locking parts   of cross section in dovetail and with on the other face of the part (6), said rounded shape in an arc of a circle. 8) Arrangement according to one of the preceding claims, characterized in that the first tube (1) is   vertical and load-bearing and in that the second tube (2) is horizontal and carried. 9) Heat exchanger consisting of a plurality of carrier tubes and perpendicular carried tubes (1, 2), characterized in that these tubes (1, 2) are fixed by means of a   connecting arrangement according to one of the preceding claims.