Set of flanging elements for pre-insulated ducts

Abstract

The present patent concerns a new set of joining elements (A, B, C, D, E) for pre-insulated ducts (P), comprising opposed plates (A, B, B', B", C, C", E1, E2) suited to be arranged on the inner surface (P1) and on the outer surface (P") of the panel (Pp) of a duct (P), at the level of the edge (Pb). Each plate (A, B, C, D, E) is provided with holes (Af, Bf, B'f, B"f, C' f, C'' f, Df, Ef). Screws (Va, Vb) inserted in said holes fix each inner plate to the corresponding outer plate, providing a stable connection with the interposed insulating panel. Holed elements are inserted in said outer plates for coupling the tie rods that support the ducting.

Description

[0001] SET OF FLANGING ELEMENTS FOR PRE-INSULATED DUCTS

[0002] DESCRIPTION

[0003] The present patent concerns the ducting for ventilation, climate control and air- conditioning systems used for transporting and distributing air, and more specifically it concerns the elements used to support and fix the various ducting sections.

[0004] Aeraulic ducts are the parts of ventilation, climate control and air-conditioning systems used for transporting and distributing air. In general, in ventilation systems they are used to heat, cool, ventilate, dehumidify or sanitize any environment, both civil and industrial.

[0005] Currently, pre-insulated ducts are increasingly used as an alternative to insulated ducts made of galvanised sheet metal. Pre-insulated ducts are constituted by panels with a core of rigid, heat-insulating polyurethane foam covered with embossed aluminium on both sides.

[0006] This is due to the fact that the ducts and their special components can be produced very easily both in the factory and on site, and that it is no longer necessary to construct the duct first and then insulate it.

[0007] Each element of the duct is made by making V-shaped notches on a panel along the folding lines, folding the various parts in such a way as to obtain a duct with square or rectangular cross section or, if necessary, to obtain the various special components, and finally join said parts by gluing.

[0008] Once the various components of the air treatment and distribution system have been obtained, they can be easily joined by means of special flanges.

[0009] Each section of the aeraulic ducting is connected and joined to the previous and following sections by means of suitable elements, such as shaped section bars, bolts or clips, which connect the flanges of each pair of adjacent sections to each other. Furthermore, each branch of the ducting is supported by tie rods fixed to the ceiling and to the brackets of the ducting sections, or to collars or half collars on which the ducting sections rest.

[0010] The subject of the present patent is a new set of joining elements for box-shaped preinsulated ducts comprising panels obtained through the expansion of synthetic insulating materials derived from petroleum, for example polyurethane foam.

[0011] One of the objects of the new set of joining elements is to facilitate the connection of consecutive sections of pre-insulated ducts.

[0012] Another object of the new set of joining elements is to allow consecutive sections of pre-insulated ducts to be connected with no need for specific tools or instruments.

[0013] Another object of the new set of joining elements is to ensure the connection of consecutive sections of pre-insulated ducts.

[0014] These and other direct and complementary objects are achieved by the new set of flanging elements for pre-insulated ducts, comprising flat plates, angled plates and L- shaped plates as well as coupling elements.

[0015] The plates can be made of metal, such as steel or aluminium, etc, or of a synthetic polymeric material, such as plastic.

[0016] A first flat plate is flat, provided with one or more holes and can have a centring and alignment notch on one of its edges.

[0017] Two flat plates as described above are arranged in such a way that they adhere to the outer and inner surfaces of the duct, at the edge of the duct itself. The holes in the outer plate are aligned with the respective holes present in the corresponding inner plate.

[0018] Suitable tightening elements, typically screws, are inserted and screwed into the holes, respectively aligned with one another, of the outer and inner plates, thus pressing said inner plate against the corresponding outer plate in such a way that the heat-insulating panel of the duct is compressed and thus firmly held between said two plates. In particular, according to the invention, a centring and alignment notch can be provided on each plate to facilitate its mutual positioning with respect to the centring and alignment notch of the other plate and consequently facilitate the positioning and alignment of the two plates, the inner and the outer one.

[0019] Each pair of plates of a ducting section is positioned alongside a pair of plates of the adjacent ducting section, thus obtaining a stable connection.

[0020] A second flat plate is essentially the same as said first flat plate and can be provided with alignment and contact projections on its edge, which in turn can be provided with a centring and alignment notch.

[0021] Said alignment and contact projections allow each plate to be correctly positioned at the appropriate distance from the edge of the duct.

[0022] Said first and said second plate can be used with ducts comprising panels whose thickness is not constant or whose size is unusual.

[0023] Plastic plates can be used as an alternative to or in combination with metal plates.

[0024] Said plastic plates can be of the smooth, ribbed or box-shaped type, with an appropriate overall thickness, and can be opposite each other and connected by means of screws for plastic, for example self-tapping screws, so as to be pressed against the outer and inner surfaces of the duct panels.

[0025] Said plastic plates are preferably provided with at least one threaded hole and at the level of said hole there can be a thickening collar intended to increase the thickness of the threaded hole.

[0026] Said plastic plates can comprise one or more pockets or compartments for the insertion of one or more L-shaped plates.

[0027] A third flanging element comprises two flat plates of the first type described above, joined together by alignment and contact projections on the same edge.

[0028] Said third flanging element is an element with a generically C-shaped cross section, whose upper part and lower part are each constituted by a flat plate of the first type described above, while the intermediate part of said generically C-shaped cross section is constituted by two or more alignment and contact projections.

[0029] Said third flanging element is conveniently used with ducts comprising panels with constant thickness and in a standard size.

[0030] A fourth plate, hereinafter referred to as L-shaped plate, has a generically L-shaped cross section, wherein: a first part of said L-shaped cross section is flat and suited to be positioned in such a way that it adheres to the outer surface of one of the above-mentioned flat plates, a second part of said L-shaped cross section is flat, is orthogonal to said first part and is suited to be arranged orthogonally to the panel and axis of the duct, said second part is oriented facing towards the outside of said duct.

[0031] Said first part of the L-shaped plate has at least one hole or recess in a generically square or semicircular shape, so that it can be fixed to one of said flat plates, while said second part of the L-shaped plate is preferably provided with several holes and / or bevels or recesses for fixing cables or supporting elements in general.

[0032] The first part of said L-shaped plate can be provided with alignment and contact projections at the level of or in proximity to the edge shared with said second part, so that it can be correctly positioned and aligned with one of said flat plates.

[0033] Said L-shaped plate can be made of metal or plastic.

[0034] A fifth plate, hereinafter referred to as angled plate, has a generically L-shaped cross section, consisting of two identical portions similar to said first and second flat plates, arranged at right angles to each other, and a third portion interposed between said two portions.

[0035] Said third portion is substantially arranged at 135 degrees with respect to the first two portions.

[0036] Furthermore, said third portion is provided with at least one central hole. The angled plate formed as described above is suited to be arranged on two outer or inner surfaces of two adjacent panels of the duct and in such a way that said third portion of said angled plate is located on the common edge shared by said two adjacent panels of the duct.

[0037] Said angled plate can be made of metal or of smooth or ribbed plastic.

[0038] Said plastic angled plate, preferably placed on the outer surface of the duct panels, can comprise one or more pockets or compartments for the insertion of one or more L-shaped plates, wherein at least one pocket or compartment is positioned in said third portion of said angled plate and at least one pocket or compartment is positioned in each of the two identical portions arranged at right angles.

[0039] A sixth plate is generically rectangular in shape and is provided with various holes.

[0040] Said sixth plate is suited to connect and join the plates attached and joined to two adjacent duct sections.

[0041] A flat plate, called inner plate, is arranged on the inner surface of the duct.

[0042] Another flat plate, called outer plate, is arranged on the outer surface of the duct. In particular, said flat plates are arranged in such a way that they are superimposed on and aligned with each other.

[0043] The alignment and contact projections of each flat plate face the other flat plate.

[0044] An L-shaped plate is arranged on the outer flat plate, in such a position that: the first part of the L-shaped plate is arranged on said outer flat plate, the second part of the L-shaped plate is arranged at right angles to the panel of the duct, facing towards the outside of the duct itself and substantially aligned with the edge of the duct, the alignment and contact projections of the L-shaped plate adhere to the edge of the flat plate provided with the respective alignment and contact projections.

[0045] Suitable tightening elements, typically screws, are inserted and screwed into the hole or holes of the outer plate, tightening said inner plate. At least one of said screws fixes said L-shaped plate to said outer plate, as well as to said inner plate.

[0046] The characteristics of the new set of flanging elements for pre-insulated ducts are better clarified in the following description, making reference to the drawings, which are attached by way of non-limiting example.

[0047] Figures 1 and la show a first flat plate (A) in a generically rectangular plane shape, suited to be positioned so that it adheres to the surface of the panel (Pp) at the edge (Pb) of the duct (P), as can be seen in Figure la.

[0048] Said flat plate (A) is provided with several holes (Af) and a centring and alignment notch (At) at the centre of an edge (Ab).

[0049] Figure 2 shows a second flat plate (B) in a generically rectangular plane shape, suited to be positioned so that it adheres to the lower surface (P1) of the panel (Pp) at the edge (Pb) of the duct (P).

[0050] Said second flat plate (B) has various holes (Bf), a centring and alignment notch (Bt) at the centre of an edge (Bb) and alignment and contact projections (Ba) arranged on said edge (Bb).

[0051] In particular, said alignment and contact projections (Ba) are not symmetrical with respect to the centre of said edge (Bb).

[0052] Figure 3 shows a third flanging element (C) comprising two flat plates (C’, C”) of the first type described abovejoined together on the same edge by alignment and contact projections (Ca).

[0053] In particular, said alignment and contact projections (Ca) are not symmetrical with respect to the centre of said edge (Cb).

[0054] Each of said two flat plates (C, C") is provided with several holes (C'f, C"f) and a centring and alignment notch (Ct) at the centre of said edge (Cb).

[0055] Said third flanging element (C) is an element with a generically C-shaped cross section, whose upper part and lower part are each constituted by a holed flat plate (C, C") of the first type described above, while the intermediate part of said generically C-shaped cross section is constituted by one or more alignment and contact projections (Ca).

[0056] Figures 4a and 4b show two views of the fourth plate (D), called L-shaped plate (D) and having a generically L-shaped cross section, wherein: the first part (DI) of said L-shaped cross section is flat and is suited to be positioned so that it adheres to the outer surface of a plate (A, B, B', B", C, C", El, E2), the second part (D2) of said L-shaped cross section is flat, is orthogonal to said first part (DI), and is suited to be positioned orthogonal to the panel (Pp) and to the axis of the duct (P),

[0057] Said first part (DI) of the L-shaped plate (D) has at least one hole (Df), while said second part (D2) of the L-shaped plate (D) is preferably provided with several holes (Do).

[0058] The first part (DI) of said L-shaped plate (D) is provided with alignment and contact projections (Da) at the level of or in proximity to the edge (Db) shared with said second part (D2), so that it can be correctly positioned and aligned with said plates (A, B, B', B", C, C", El, E2).

[0059] The height of the second part (D2) can be different, according to the characteristics of the duct (P).

[0060] Figure 4c shows an L-shaped plastic plate (D) having a generically L-shaped cross section, wherein: the first part (DI) of said L-shaped cross section is flat and is suited to be positioned so that it adheres to the outer surface of a plate (A, B, B', B", C, C", El, E2), the second part (D2) of said L-shaped cross section is flat, is orthogonal to said first part (DI), and is suited to be positioned orthogonal to the panel (Pp) and to the axis of the duct (P). Said first part (DI) of the L-shaped plate (D) has at least one recess in a generically square or semicircular shape, while said second part (D2) of the L-shaped plate (D) is preferably provided with several holes (Do).

[0061] Figures 5a and 5b show the assembly and use of two flat plates (B1, B") and one L- shaped plate (D).

[0062] A flat plate (B1), called inner plate (B1), is arranged on the inner surface (P1) of the panel (Pp) of the duct (P), in such a way that its projections (B'a) are arranged on the edge (Pb) of the duct (P) itself.

[0063] Another flat plate (B"), called outer plate (B"), is arranged on the outer surface (P") of the same panel (Pp) of the duct (P), in such a way that its projections (B"a) are arranged on the edge (Pb) of the duct (P) itself. In particular, said outer flat plate (B") is positioned by aligning its centring and alignment notch (Bt") with the centring and alignment notch (Bt') of the inner flat plate (B1), so that it is superimposed on and aligned with the latter.

[0064] The centring and alignment notches (B , Bt") present on the two flat plates (B1, B") allow the two plates (B1, B") themselves to be positioned correctly, with their respective holes (B'f, B"f) aligned.

[0065] The alignment and contact projections (B'a, B"a) of each flat plate (B1, B") face the other flat plate (B", B').

[0066] An L-shaped plate (D) is arranged on the outer flat plate (B’), in such a position that: the first part (DI) of the L-shaped plate (D) is arranged on said outer flat plate (B"), the second part (D2) of the L-shaped plate (D) is arranged at right angles to the panel (Pp) of the duct (P), facing towards the outside of the duct (P) itself and substantially aligned with the edge (Pb) of the duct (P), the alignment and contact projections (Da) of the L-shaped plate (D) adhere to the edge (B"b) of the flat outer plate (B") provided with the respective alignment and contact projections (B"a).

[0067] Screws (Va, Vb) are inserted in the holes (B"f) provided in the outer plate (B") and tightened in the holes (B'f) provided in said inner plate (B‘), thus fixing it. At least one of said screws (Vb) fixes said L-shaped plate (D) to said outer plate (B"), as well as to said inner plate (B1).

[0068] Figures 5c and 5d show two different views of two flat plates (B,1B") made of plastic and screwed together.

[0069] Figure 5e shows the assembly and use of the flat plastic plates (B,1B") placed side by side to connect two ducts, and of the L-shaped plate (D), which is also made of plastic. A first inner plate (B1) is arranged on the inner surface (P1) of the insulating panel (Pp) of a first duct (P) alongside a second inner plate (B1) arranged on the inner surface (P1) of the insulating panel (Pp) of a second duct (P).

[0070] In parallel, a first outer plate (B") is arranged on the outer surface (P") of the insulating panel (Pp) of the same first duct (P) alongside a second outer plate (B") arranged on the outer surface (P") of the insulating panel (Pp) of the same second duct (P).

[0071] Said outer plate (B") comprises a pocket or compartment (T) for the insertion of an L-shaped plate (D) in such a position that:

[0072] - the first part (DI) of the L-shaped plate (D) is arranged on said outer flat plate (B") fixed inside said pocket (T) by means of a protruding element or clip, the second part (D2) of the L-shaped plate (D) is arranged at right angles to the panel (Pp) of the duct (P), facing towards the outside of the duct (P) itself and substantially aligned with the edge (Pb) of the duct (P),

[0073] Each inner and outer plate (B1, B") has a hole provided with a thickening collar, wherein the hole (B"f) of each outer plate (B") is aligned with the respective hole (B'f) of the corresponding inner plate (B1).

[0074] Two self-tapping screws with a steel spiral are respectively inserted in the two holes (B"f) present in the two outer plates (B") placed side by side and screwed into the two holes (B'f) present in the two corresponding inner plates (B1) that are thus tightened and pressed against the respective panels (Pp).

[0075] Figure 6 shows the angled plate (E), which is generically in the shape of an L and consists of two identical flat portions (El, E2) similar to the above-mentioned flat plates (B) and arranged at right angles to each other.

[0076] Also said two flat portions (El, E2) of the angled plate (E) are provided with alignment and contact projections (Ea), centring and alignment notches (Et) at the centre of an edge (Eb) and holes (Ef). There is a third flat portion (E3) interposed between said two portions (El, E2).

[0077] Said third flat portion (E3) is substantially arranged at 135 degrees with respect to the first two portions (El, E2).

[0078] Said third flat portion (E3) is provided with at least one central hole (Eo).

[0079] Figures 6a, 6b and 6c show the assembly and use of the angled plates (E) made of plastic.

[0080] A first inner angled plate (E) is arranged on the inner surface (P1) of two adjacent panels of a duct arranged at right angles to each other so that the third portion (E3) of said angled plate is positioned on the common edge between said two adjacent panels of the duct.

[0081] A second outer angled plate (E") is arranged on the outer surface (P") of the same two adjacent panels of the duct and comprises three pockets or compartments (T) for the insertion of three L-shaped plates (D), wherein one pocket or compartment (T) is positioned in said third portion (E3) of said angled plate and one pocket or compartment (T) is positioned in each of the two identical portions (El, E2) arranged at right angles.

[0082] A self-tapping steel screw is inserted in the central hole of said third portion (E3) of said outer angled plate (E") and screwed in the corresponding hole present in said third portion of said inner angled plate (E1) so as to bring said inner and outer angled plates (E1, E") closer to each other and tighten them until fixing the panel (Pp) of the duct (P).

[0083] Figure 7 shows the assembly and use of the angled plate (E), two flat plates (B1) and an L-shaped plate (D).

[0084] The angled plate (E) is arranged on two outer surfaces (P") of two adjacent panels of the duct (P) and in such a way that said third portion (E3) of said angled plate (E) is located on the common edge (Ps) shared by said two adjacent panels (P) of the duct. On the inner surfaces (P1) of said two adjacent panels (P) there are two flat plates (B1), which are aligned with said two portions (El, E2) of the angled plate (E).

[0085] An L-shaped plate (D) is arranged on the third portion (E3) of the angled plate (E). Suitable screws (Va, Vb) connect and fix said angled plate (E) to said flat plates (B1), and said L-shaped plate (D) to said angled plate (E).

[0086] The new set of flanging elements for pre-insulated ducts (P) offers significant advantages.

[0087] The new set of elements is made up of a minimum number of elements.

[0088] The new set of elements is suitable for sections of duct (P) whose panels (Pp) have various and different thicknesses. The plates (A, B, D, E) can be used with any thickness of the panel (Pp), using screws (Va, Vb) of the appropriate length according to the need.

[0089] The new set of elements can be adapted to the differences in thickness or to the non- uniform thickness of the panels (Pp) of the ducts (P). In fact, by using screws (Va, Vb) of a suitable length, it is possible to bring the plates (A, B, E) close to each other and gradually tighten them until fixing the panel (Pp) of the duct (P).

[0090] Furthermore, since the alignment and contact projections (Ba, Ca, Ea) are not symmetrical with respect to the centre of each plate (B, C, E), said alignment and contact projections (Ba, Ca, Ea) do not interfere with one another when said plates are superimposed, especially in the case of panels (Pp) with reduced thickness. As a consequence of the above, furthermore, less sealing material is required between the edges of each pair of coupled ducts (P).

[0091] The new set of elements can be made of metal, which makes it non-combustible, or plastic.

[0092] The fixing of the new set of elements to the panel (Pp) of the duct (P) is ensured.

[0093] The proper tightening of the screws (Va, Vb) makes it possible to exert a high pressure between the plates (A, B, E), even when thin sheet metal is used.

[0094] The new set of elements does not require adhesives, therefore it is not necessary to wait for the adhesives to polymerize or harden before proceeding with the assembly of the next section of duct (P).

[0095] Furthermore, since no chemical substances such as adhesives and / or solvents are used, it is suitable for duct sections made of any metal, plastic or foam material.

[0096] The plates (A, B, C, D, E) can be aligned in a simple and quick manner.

[0097] The new set of elements allows the section of the duct (P) to which they are applied to be joined even to traditional sheet metal ducts and to the accessories of ventilation systems.

[0098] These are the schematic outlines that are sufficient for the expert in the art to carry out the invention, consequently, on practical application variants may be obtained that do not affect the substance of the innovative concept introduced herewith.

[0099] Therefore, with reference to the above description and the attached drawings, the following claims are made.

Claims

CLAIMS1. Set of flanging elements (A, B, C, D, E) for pre-insulated ducts (P), comprising a flat plate (A, B, B', B", C, C", El, E2) having a substantially flat, generically rectangular shape and provided with several holes (Af, Bf, B'f, B"f, C'f, C"f, Ef), characterized in that two of said flat plates, respectively referred to as inner plate (B1, C) and outer plate (B", C"), are intended to be arranged on the inner surface (P1) and on the outer surface (P") of a panel (Pp) of the duct (P) in proximity to or at the level of its edge (Pb), and wherein tightening elements or screws (Va, Vb) are inserted and screwed into holes (B"f, C"f, B'f, C'f) present in the outer plate (B", C") and in the corresponding inner plate (B', C) and respectively aligned with one another, pressing said inner plate (B', C) and said outer plate (B", C") against each other in such a way as to compress and restrain said panel (Pp) of the duct (P) in a stable manner.

2. Set of flanging elements (A, B, C, D, E) according to claim 1, characterized in that said plate (A, B, B', B", C, C", El, E2) comprises a centring and alignment notch (At, Bt, B , Bt", Ct, Et) located at the centre of one of its edges (Ab, Bb, Cb, Eb) and suited to facilitate the alignment between the inner plate (B', C) and the outer plate (B", C").

3. Set of flanging elements (A, B, C, D, E) according to claims 1, 2, characterized in that said plate (B,_B', B", C, C", El, E2) comprises alignment and contact projections (Ba, B'a, B"a, Ca, Ea) arranged on the edge (Bb, Cb, Eb) and wherein said alignment and contact projections (Ba,_B'a, B"a, Ca, Ea) are preferably asymmetrical with respect to said centring and alignment notch (Bt, B , Bt", Ct, Et).

4. Set of flanging elements (A, B, C, D, E) according to the preceding claims, characterized in that said plate (A, B, B', B", C, C", El, E2) is provided with ribs.

5. Set of flanging elements (A, B, C, D, E) according to the preceding claims,characterized in that it comprises an element (C) with generically C-shaped cross section, whose upper part (C) and lower part (C") are each constituted by a flat plate (C, C") according to claim 1, and the intermediate part of said generically C-shaped cross section is constituted by one or more alignment and contact projections (Ca), and wherein said upper part (C) and lower part (C") are suited to be arranged on the inner surface (P1) and the outer surface (P") of a panel of the duct (P), and wherein said one or more alignment and contact projections (Ca) are suited to be arranged on the edge (Pb) of said panel of said duct (P).

6. Set of flanging elements (A, B, C, D, E) according to claim 1, characterized in that said plate (A) is made of smooth or ribbed plastic and is provided with at least one preferably threaded hole and preferably, at the level of said hole, with a thickening collar.

7. Set of flanging elements (A, B, C, D, E) according to claim 6, characterized in that said plate (A) comprises one or more pockets or compartments (T) for the insertion of one or more L-shaped plates.

8. Flanging elements (A, B, C, D, E) for pre-insulated ducts (P) according to claim 1, characterized in that they comprise an angled plate (E) in a generic L-shape formed by two identical flat portions (El, E2) and a third flat portion (E3) interposed between said identical flat portions (El, E2), and wherein each flat portion (El, E2) is similar to the flat plate (A, B, B', B", C, C", El, E2) according to claims 1, 2, 3, 4, 5, and wherein said flat portions (El, E2) are arranged at right angles to each other.

9. Flanging elements (A, B, C, D, E) for pre-insulated ducts (P) according to claim 8, characterized in that each of said two flat portions (El, E2) of said angled plate (E) is provided with alignment and contact projections (Ea), centring and alignment notches (Et) and holes (Ef), similarly to said flat plate (A, B, B', B", C, C",El, E2).

10. Flanging elements (A, B, C, D, E) for pre-insulated ducts (P) according toclaim 9, characterized in that said third flat portion (E3) of said angled plate (E) is substantially arranged at 135° with respect to said first two portions (El, E2).

11. Flanging elements (A, B, C, D, E) for pre-insulated ducts (P) according to claims 8, 9, characterized in that said third flat portion (E3) of said angled plate (E) is provided with at least one central hole (Eo).

12. Flanging elements (A, B, C, D, E) for pre-insulated ducts (P) according to claims 8, 9, 11, characterized in that said angled plate (E) comprises one or more pockets or compartments (T) for the insertion of one or more L-shaped plates (D), wherein at least one pocket or compartment (T) is positioned in said third portion (E3) of said angled plate (E) and at least one pocket or compartment (T) is positioned in each one of the two identical flat portions (El, E2) arranged at right angles to each other.

13. Set of flanging elements (A, B, C, D, E) according to the preceding claims, characterized in that they comprise an L-shaped element (D) with generically L- shaped cross section, wherein: the first part (DI) of said L-shaped cross section is flat and is suited to be positioned so that it adheres to the outer surface of a plate (A, B, C, E) according to the preceding claims, the second part (D2) of said L-shaped cross section is flat, is orthogonal to said first part (DI), and is suited to be positioned orthogonal to the panel (Pp) and to the axis of the duct (P), and wherein said first part (DI) of said square plate (D) has at least one hole (Df) or one recess in a generically square or semicircular shape for attaching said first part (DI) to one of said plates (A, B, B', B", C, C", El, E2), while said second part (D2) of the square plate (D) is preferably provided with several holes (Do).

14. Set of flanging elements (A, B, C, D, E) for pre-insulated ducts (P) according to claim 13, characterized in that said fourth square plate (D) comprises alignmentand contact projections (Da) at the level of or in proximity to the edge (Db) between said first part (DI) and said second part (D2), so as to allow its correct positioning and alignment with said plates (A, B, B', B", C, C", El, E2).

15. Insulated ducting for ventilation, climate control and air conditioning for the transport and distribution of air, characterized in that it comprises supporting and fixing elements for the various ducting sections, according to one or more of the preceding claims.

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