FR2625285A1 - Section of duct for the flow of a fluid - Google Patents

Abstract

According to the invention it has, at its first end 2B, a rim 4 arranged perpendicularly to the longitudinal direction of the said section 1B and turned outwards from the latter and, at its second end 3B, a rim 6 shaped from a first flap 7 turned towards the outside of the said section 1B and being folded over towards the latter, and of a second flap 8 extending the said first flap 7 and arranged perpendicularly to the longitudinal direction 5 of the said section so that, when the first end 2B of the said section 1B is connected to the second end 3A of another section 1A or vice versa a space 9 is left between the facing ends, a sealing gasket 10 being located in the said space 9, whilst fixing means 11 secure the said two facing end rims. Application of the sections of duct to the ventilation and/or heating of premises.

Description

The present invention relates to the duct sections for the circulation of a fluid, which are intended, once connected one after the other, to convey air to provide ventilation and / or heating of premises, in particular industrial.

The sheath sections are made either of folded sheet metal generally having a square or rectangular section, or of spiral sheet metal then having a circular section. The connection of said sections to each other must be made in a rigid and sealed manner in order to avoid leakage of fluid at their assembly. For this, each end of a section is equipped with a frame with which a frame mounted on the end cooperates opposite another section to be connected to the previous one. A seal is placed between the two frames facing each other, which are then linked together by fixing means.

For example, in the case of a section with a square or rectangular section, the frame is made up of four sections connected to each other by angles shaped as a square. The frame, thus produced by the profiles and the brackets, is fixed by bolting, riveting, or by welding to the walls of the section, then defining a rigid frame. The profiles and the brackets have sections adapted to cooperate with each other, and to be fixed to the walls of the sections. The seal is then fixed or housed in the external face of one of the frames, fixed at one end of a first section of sheath, and comes to cooperate with the external face of the other frame, fixed at the end. a second section of sheath. The final fixing of the two sections is obtained, for example, by means of bolts securing the corresponding brackets of the two frames. In addition, elastic metal clips are arranged at regular intervals on the profiles to hold them one against the 'other so that the seal is properly and uniformly pressed over its entire periphery.

The connection of sheath sections by the use of frames attached to the ends give satisfactory results. However, the manufacture, assembly, then mounting of the elements constituting the frame (profiles, brackets, ...) on the sheath sections require numerous manual mechanical operations of positioning, screwing, etc. ... involving interventions long and expensive.

The present invention aims to overcome these drawbacks, and relates to sheath sections for the circulation of a fluid, the design of each of them makes it possible to overcome the frames usually used for their connection one after the other. others, while guaranteeing a rigid and watertight assembly between said sections to be connected.

For this purpose, the section of sheath for the circulation of fluid, intended to be connected at each of its ends to another section of sheath, is remarkable, # according to the invention, in that it has, at its first end , a rim arranged substantially perpendicular to the longitudinal direction of said section, while being turned towards the outside thereof, and, at its second end, a rim shaped by a first flap turned towards the outside of said section while being turned down towards the latter, and of a second flap extending said first flap, and which is arranged substantially perpendicular to the longitudinal direction of said section, so that, when the first end of said section is connected to the second end of a another section, or vice versa, a space is provided between the two said ends facing one another, being delimited by the rim of the first end of said section and by the two successive flaps of the rim of the second end of the other section, a seal being then placed in said space while fixing means secure the two said opposite end flanges.

Thus, thanks to the invention, the assembly with sealing of the sheath sections one after the other is carried out without difficulty and without having recourse to frames added to said sections.

In a preferred embodiment, the flange of the first end can be shaped by two flaps folded against each other around fold lines. Advantageously, said rim of the first end, shaped by said flaps, has a U-shaped section whose base of said flaps is perpendicular to the longitudinal direction of said section. This embodiment makes it possible in particular to stiffen the first end of said section.

According to another characteristic of the invention, a joint cover can be placed on the edges of the ends opposite said sections to be connected, so as to close off the space in which said seal is arranged, said joint cover being secured to at least one of said flanges by means of connection means.

In the case where the sheath section has a square, rectangular, or similar section, said joint cover may be formed by profiles connected to each other by brackets whose branches are inserted into the ends of said profiles. Said joint cover is advantageously fixed to the second end of the section, shaped by the rim with two flaps.

In a particular embodiment, the section of the profiles of the joint cover has a U-shape, in which are inserted at their ends the branches of said brackets of corresponding U-shaped section, one of the wings of said U formed by the profiles and the brackets being introduced into a clearance formed between the flap of the ledge folded towards said section and the walls of the latter, while the other U-shaped wing of said sections and said brackets covers the space in which said housing is housed seal.

Advantageously, the wing of each of said sections coming to cover said seal is extended a first time by being folded down perpendicularly in the direction of the opposite wing, thereby defining an intermediate part of said wing, then a second time by being folded down perpendicularly from from the intermediate part towards the base of the U, then defining an end part, the latter, arranged parallel to the wings of said U, forming with the two flaps of the rim of the second end of said section a groove intended to receive said joint , so that the latter can be put in place and maintained in said groove.

 In a preferred embodiment, said means for connecting said cover to said flap of the second end may be constituted by rivets which secure the base of the U of the profiles and brackets with the flap of said flange, perpendicular to the longitudinal direction of said section.

Furthermore, said means for fixing the ends opposite this two sections to be connected may be constituted by screws or the like securing the base of the U of the flaps defining the edge of the first end with the intermediate part of the wing of the U of each. profiles defining said joint cover mounted on the second end of the other section.

The figures of the appended drawing will make it clear how the invention can be implemented. In these figures, identical references designate similar elements.

Figure 1 is a schematic view illustrating the principle of connection of sheath sections shaped according to the invention.

2 shows, in partial exploded perspective, the ends of two sections of sheath before their connection, said sections having a square section or the like.

Figure 3 is a view similar to the previous showing the two said connected sheath sections.

Figures 4 and 5 show, in section, alternative embodiments of the ends of the sheath sections.

The sheath sections according to the invention are intended, once connected with sealing to each other, to allow air circulation to thereby ensure ventilation and / or heating of premises.

As shown schematically in Figure 1, three sheath sections 1A, 1B and îC, according to the invention, have been illustrated and are connected to each other. The section 1B is connected, by its first end 2B, to the second end 3A of the section 1A (whose first end 2A is not shown), and, by its second end 3B, to the first end 2C of the section 1C (of which ì - second end 3C is not shown).

In this embodiment, the sections 1A, 1B and 1C may have either a circular section, or a square section or the like.

According to the invention, the first end 2A, 2B and 2C of each section 1A, 1B and 1C has an identical rim 4 substantially perpendicular to the longitudinal direction 5 of said sections, while being turned towards the outside thereof, while the second end 3A, 3B and 3C of said sections has an identical rim 6 shaped by a first flap 7 turned towards the outside of the corresponding section by being folded towards it, and by a second flap 8 extending the first flap 7 , and which is arranged substantially perpendicular to the longitudinal direction 5.

Thus, as shown diagrammatically in FIG. 1, when the rim 4 of the first end of each section is opposite the rim 6 of the second end of the opposite section, a peripheral space 9 is provided, in which a seal is housed sealing 1C. Fixing means, such as screws 11, join the two flanges 4 and 6 ensuring the mechanical connection between the opposite ends of said sections, so that the seal 10, made of an appropriate synthetic material, bears on the flap 7 of the rim 6, is pressed, during the tightening of the screws 11, by the rim 4 and the flap 8 of the rim 6 of said sections thereby ensuring total sealing. Thanks to the appropriate shape of the ends of the sections, it is thus possible to rigidly connect and with sealing the sheath sections without having to use frames attached to the ends of the sections.

Furthermore, a joint cover 12 can be arranged at the level of the ends of the order in order on the one hand to close the peripheral space 9 thus protecting the seal 10, and on the other hand, to stiffen the connection. proper of said sections.

An embodiment of the joint cover will in particular be described with reference to FIGS. 2 and 3. This joint cover 12 can be fixed to the flap 8 of the flange 6 by connection means symbolically represented at 14 in FIG. 1.

The joint cover 12 then envelops the peripheral space 9 in which the seal 10 is housed.

An end portion of the two sections, for example 1B and 1C, intended to be connected, is shown opposite FIG. 2. The sheath sections in this example have a square section. In this figure, we can see the rim 24 of the second end 2 of the sheath section lC. In this embodiment, the rim 24 of the first end 2C of the section 1C is shaped by two flaps 15 and 16 folded one against the other around fold lines forming a U-shaped section whose base 17 is perpendicular to the longitudinal direction 5 of said section 1C. This arrangement improves the rigidity of the rim 24.

The rim 6 of the second end 3B of the section 1B is similar to that described with reference to FIG. 1, that is to say that it is shaped by the first flap 7 turned substantially flat against the walls 20 defining the section 1B, and which extends from the second flap 8 perpendicular to the direction 5 of the section. The base 17 of the rim 4 and the second flap 8 of the rim 6 are parallel to each other.

Furthermore, said rim 6 is associated with the joint cover 12.

For the sake of clarity in FIG. 2, the joint cover 12 is shown in a position corresponding to that which it occupies before its final fixing to the rim 6 of the section 1B.

In this embodiment for which the sections have a square section, the joint cover 12 is constituted by four sections 21, two of which are visible in Figures 2 and 3, interconnected by brackets 22 whose branches 22A-22B are inserted into the corresponding ends of said sections, in order to constitute a single assembly.

The section of the sections 21 and the section of the brackets 22 have a U-shape, the section of said brackets being slightly smaller than that of the profiles to fit into them.

As shown in Figure 2, one of the wings, respectively 23 of the profiles and 24 of the branches of the brackets, are introduced during the mounting of the joint cover on the rim 6 in a clearance 25 formed between the first flap 7 of the rim 6 and the end of the walls 20 of the section 1B. This arrangement allows easy installation of the joint cover 12 relative to the rim 6 of the second end 3B of the sheath section 1B. The joint cover 12 is secured to the rim 6 is provided by connecting means, such as rivets 26, fixedly assembling, as shown in cutaway in FIG. 2, the flap 8 of the rim 6 at the bases respectively of the profiles 21, and 28 of the brackets 22.

 In addition, the wing 30 of the sections 21, opposite the wing 23, extends, for the first time, by being folded perpendicularly in the direction of the wing 23, thereby defining an intermediate part 31, then a second time, by being folded perpendicularly from the intermediate part 31, towards the base 27 of each profile, then defining an end part 32 parallel to the wings 30 and 23.

The intermediate part 31, perpendicular to the direction 5 of the sheath section 1B, is parallel to the base 17 of the rim 4 of the section 1C. Advantageously, when the joint cover is secured to the rim 6 by the connecting means 26, the intermediate part 31 forms with the two flaps 7 and 8 of the rim 6, a groove 34 into which the seal is intended to be introduced. 10. The latter is shown in FIG. 2 in a position corresponding to that which it occupies when it is placed in the groove 34. The section of said groove is less than the section of the seal 10 so that the latter either pressed and kept properly in place in the groove, before the sections are connected, the lateral face 10A of the seal, intended to come into contact with the rim 4 of the section 1C, projecting from the groove.

The connection of the end 2C of the sheath section 1C to the end 3B of the sheath section 1B is illustrated in FIG. 3. On this one, it can be seen that the base 17 of the rim 24 comes into contact with the face 10A of the seal 10, trapped in the groove 34, the intermediate part 31 of each profile 21 being in a close position, or even in contact with the base 17 of the flange 4.

The final fixing of the two sections, is carried out for example by means of screws 35 (one of which is shown in the cutaway of Figure 3) arranged at regular intervals, and which secure the base 17 of the flaps constituting the flange 4 to the part intermediate 31 of the joint cover 12.

In this case, said joint cover, linked to the flange E. serves both as protection and as a housing for the joint, ç, but also as a fixing device for connecting said sections together.

FIG. 24 shows an alternative embodiment of the ends of the sections to be connected. In this case, the edges 4 and 6 of each section are identical, and are shaped analogously to the edge 6 previously described with reference to FIGS. 1 to 3. The edge 4 then has a first flap 7C folded outwards from the end 2C of section 1C, and which is extended by a second flap 8C perpendicular to the longitudinal direction 5. A clearance 25 is provided between the flap 7C and the walls of the sheath section 1C and allows the insertion of the profiles 21C of the cover -joint 12C similar to mounting the joint cover 12 on the flange 6 of the second end 3B of the section 1B.

The means of connection of each joint cover 12 and 12C to its respective rim 24 or 6 have not been shown, as have the fixing means joining the rims together.

A space 9 is thus created between the two flaps 7C, 8C and 7.8 respectively of each flange 4 and 6, and the end portion 32 of each profile so that the seal 10 can be housed and maintained in said space. This variant embodiment improves the rigidity of the connection thus produced, and makes it possible to reduce production costs since the ends are identical, and can then be obtained on the same machine.

 As for Figure 5, it shows another alternative embodiment of the first end of said sections, in the sense that the flap 24 no longer has a U-shaped section but an L shape. This is shaped by flaps 15C and 16C successively folded around fold lines to present a two-ply rim providing high mechanical rigidity. The joint cover 12-mounted on the rim 6 of the section 13 is of a design and an assembly substantially similar to those illustrated with reference to FIG. 1.

Other alternative embodiments could obviously be imagined without departing from the scope of the invention.

Claims (10)

1 - Sheath section for fluid circulation, intended to be connected at each of its ends to another sheath section, characterized in that it has, at its first end (2B), a flange (4) arranged substantially perpendicular to the longitudinal direction of said section (1B), while being turned towards the outside thereof, and, at its second end (3B), a flange (6) formed by a first flap (7) turned towards the inside said section (1B) being folded towards it, and a second flap (8) extending said first flap (7), and which is arranged substantially perpendicular to the longitudinal direction (5) of said section, so that, during the connection of the first end (2B) of said section (1B) to the second end (3A) - of another section (lA), or vice versa, a space (9) is provided between the two said ends opposite l 'from one another, being delimited by the flange (4) of the first end of said section (1B) and by the two successive flaps of the rim (6) of the second end of the other section (1A), a seal (10) then being disposed in said space (9), while fixing means (11) join said two opposite end edges. 2 - Sheath section according to claim 1, characterized in that the flange (4) of the first end (23) is shaped by two flaps (15,16) folded against each other around fold lines. 3 - sheath section according to claim 2, characterized in that said flange (4) of the first end (23), shaped by said flaps (15,16), has a U-shaped section whose base (17) of said flaps is perpendicular to the longitudinal direction (5) of said section. 4 - Sheath section according to one of claims 1 to 3, characterized in that a joint cover (12) is disposed on the edges of the opposite ends of said sections to be connected, so as to seal the space (9 ) in which is arranged said seal (10), said joint cover (12) being secured to at least one of said flanges by means of connection means (124). 5 - sheath section according to any one of claims 1 to 4, of the type having a square, rectangular or similar section, characterized in that said joint cover (12) is constituted by profiles (21) connected together by brackets (22) whose branches (22A, 22E) are inserted into the ends of said sections. 6 - Sheath section according to claim 5, characterized in that said joint cover (12) is fixed to the second end (3B) of said section (1B), shaped by the flange (6) with two flaps. 7 - Sheath section according to one of claims 5 or 6, characterized in that the section of the profiles (21) of the joint cover has a U-shape, in which are inserted at their ends the branches of said brackets (22 ) of corresponding U-shaped section, one (23,24) of the wings of said U formed by the profiles and the brackets being introduced into a clearance (25) formed between the flap (7) of the flange (6) folded towards said section and the walls (20) thereof, while the other U-shaped wing (30) of said sections (21) and said brackets (22) covers the space (9) in which said seal is housed sealing (10). 8 - Sheath section according to claim 7, characterized in that the wing (30) of each of said sections (21) covering said seal (10) extends a first time by being folded perpendicularly towards the opposite wing , thus defining an intermediate part (31) of said wing, then a second time, being folded perpendicularly from the intermediate part (31) towards the base of the U, then defining an end part (32), the latter, arranged parallel to the wings (23,30) of said U of the profiles, forming with the two flaps (7,8) of the flange (6) of the second end (3B) of said section (1B), a groove (34) intended to receive said seal (10). 9 - Sheath section according to one of claims 7 to 8, characterized in that said means for connecting said joint cover (12) to said flange (6) of the second end are constituted by rivets (26) which secure the base (27, 26) of the U of the profiles and of the brackets with the flap (8) of said flange (6), perpendicular to the longitudinal direction (5) of said section.  10 - Sheath section according to one of claims 8 to 9, characterized in that said means for fixing the ends opposite two sections (1A and 1B) to be connected are constituted by screws or the like (35) securing the base (17) of the U of the flaps defining the flange (4) of the first end (2B) with the intermediate part (31) of the wing of the U of each profile (21) defining said joint cover mounted on the second end of the other section (1A).