EP2402656B1 - Retrofit smoke evacuation conduit designed to be installed in an existing evacuation conduit - Google Patents

Description

The present invention relates to a renovation smoke evacuation duct intended to be installed in an existing exhaust duct.

Existing smoke evacuation ducts, especially in older private houses, are generally included in the walls of the building since they are often made from bricks or others, so that when they are old or defective, it is necessary to destroy part of the construction to repair or replace them to bring them into compliance with current standards.

This results in a cost and significant inconvenience, so that sometimes the inhabitants of such a construction renounce to use such a conduit and thus give up the use of their chimney so as not to have to remake all their decoration.

As a technological background, the patent is known US 2006/130411 which describes a chimney flue that is not intended for renovation. This conduit comprises a tubular body and a device for covering said body with a band whose edges are held together by screwing. Holders are also described in the document US 2008/254729 but are not suitable for a device, as described in US 2006/130411 .

An object of the present invention is therefore to provide a renovation smoke evacuation duct whose design overcomes the disadvantages of the state of the art through the absence of intervention on the existing dilapidated duct.

For this purpose, the subject of the invention is a smoke evacuation duct of renovation intended to be installed in an existing exhaust duct, said renovation smoke evacuation duct comprising at least one metal tubular body and a covering device intended to cover said tubular body from the outside, said covering device comprising at least one band of width greater than the perimeter of the tubular body to be covered and fasteners for holding said band capable of maintaining said band in a so-called wrapping position in which the band extends axially along said tubular body and surrounds said tubular body with one of its longitudinal edges, said visible, overlapping the other longitudinal edge, said masked, to form a lap connection zone, said band comprising, on its outer face, at least two sets of anchoring points or hooking each adjacent a longitudinal edge of the strip, said series of anchor points or the eye is arranged to extend on either side of the visible longitudinal edge of the strip in the wound state of the band in its wrapping position around the tubular body. The exhaust duct is characterized in that each holding clip is adapted, in said wrapping position, to connect an anchorage point of one series to an anchorage point of the other series by stepping over the edge. visible longitudinal of said band.

The covering of the metal tubular body by a strip whose design allows its mounting and its progressive maintenance around said tubular body allows an on-site installation of said strip as the tubular body is introduced into the interior of the tubular body. an existing conduit.

When the tubular body is in the form of a set of interlocking tube sections as soon as they are introduced into an existing smoke outlet, the assembly can be covered by the strip at as the assembly of tube sections allows a gradual introduction of said conduit obtained inside an existing conduit.

When the tubular body is in the form of a flexible duct, the covering of said body by the band can be performed as and when the introduction of said body in the existing duct.

The nature of the covering device makes it possible to thermally isolate the renovation duct thus formed from the existing smoke evacuation duct.

Preferably, each tube section has an ovoid cross-section.

The invention also relates to a method of laying a renovation smoke evacuation duct of the aforementioned type, said method comprising at least one progressive introduction step of the tubular body inside the existing duct and a step covering the outside of the tubular body portion introduced into said existing duct by a covering device, this covering device comprising at least one band of width greater than the perimeter of the tubular body to cover and fasteners for maintaining said strip adapted to maintain said strip in a so-called wrapping position in which the strip extends axially along said tubular body and surrounds said tubular body with one of its longitudinal edges, said visible, overlapping the other edge longitudinal, said masked, to form a lap bonding zone, said strip comprising, on its outer face, at least two series of points anchoring or hooking each adjoining a longitudinal edge of the strip, said series of anchoring points or hooking being arranged to extend on either side of the visible longitudinal edge of the strip to the wound state of the web in its wrapping position around the assembly of tube sections, said method further comprising a step of laying at least one holding clip, said holding clip being adapted, in said wrapping position, to connect an anchor point of one series to an anchor point of the other series by stepping over the visible longitudinal edge of said band, said step of placing a fastener maintaining being repeated for each new portion of tubular body introduced into the existing conduit.

When the tubular body is formed of an axial assembly of tube sections by an interlocking assembly, a first section of tube is introduced into the existing duct, said section of tube is covered and each assembly step of a new section is then of tubing is followed by a step of covering by a band portion of the assembled tube section and by a step of laying at least one fastener at said band portion.

• La figure 1 représente une vue en perspective d'un conduit d'évacuation de fumée de rénovation au cours de l'étape de fermeture par des attaches de la bande de recouvrement du corps tubulaire ;
• La figure 2 représente une vue en perspective similaire à la figure 1, un capot de recouvrement du haut de l'assemblage ayant été représenté ;
• La figure 3 représente une vue en coupe transversale de la bande à l'état enroulé avec les attaches de maintien positionnées.

The invention will be better understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:

• The figure 1 represents a perspective view of a renovation smoke evacuation duct during the closing step by fasteners of the covering strip of the tubular body;
• The figure 2 represents a perspective view similar to the figure 1 a top cover of the assembly having been shown;
• The figure 3 represents a cross-sectional view of the strip in the wound state with the positioning fasteners positioned.

As mentioned above, the smoke evacuation duct, object of the invention, is a so-called renovation duct more particularly intended to be installed in an existing exhaust duct.

This smoke evacuation duct comprises at least one tubular body 1 and a covering device intended to cover the tubular body 1 from the outside. In the examples shown, the tubular body 1 is formed of two sections 1 of metal tube, in particular stainless steel, assembled axially to one another by an interlocking arrangement, the covering device being intended to cover the assembly of tube sections from the outside. Generally, the tube sections are held together by a clamp 14 clamp. The tubular body 1 could also have been made in the form of a flexible conduit. The covering device comprises, for its part, at least one strip 2 of width greater than the diameter of the tube section of greater perimeter to be covered and fasteners 3 for holding said strip 2 able to hold said strip 2 in a position called wrapping.

In this wrapping position, the band 2 extends axially along the tubular body 1, in this case along the assembly of the tube sections, that is to say with its longitudinal axis substantially parallel to the longitudinal axis formed by the in-line assembly of tube sections or the longitudinal axis of the flexible conduit.

In this wrapping position, the band surrounds the tubular body 1 formed here by assembling tube sections with one of its longitudinal edges, said visible, shown at 4 in the figures, overlapping the other edge longitudinal, said masked, shown in 5 in the figures, to form a zone 6 overlapping connection. The width of this overlapping bonding zone 6 is a function of the diameter of the tubular body. Generally, the width of this overlapping bonding zone 6 corresponds to the width of the strip minus the perimeter of the tubular body taken at the larger diameter tube section in the case of an assembly of tube sections.

Said strip 2 comprises, on its outer face, at least two series 7, 8 anchoring points 9 or hooking each adjacent a longitudinal edge 4, 5 of the strip.

Series 7, 8 of points 9 anchoring or hanging are arranged so as to extend, on either side of the visible longitudinal edge 4 of the strip 2, in the wound state of the strip 2 in its wrapping position around the assembly of sections 1 of tube. Each holding clip 3 is capable, in said wrapping position, of connecting an anchoring point 9 of a series 7 to an anchoring point 9 of the other series 8 by stepping over the visible longitudinal edge 4 of said band 2

In the examples shown, the points 9 for anchoring or hooking of the series 7, 8 of the anchoring points 9 of the strip 2 affect the shape of hooks.

Generally, the hooks are generally C-shaped and, in the flattened position of the band 2, the hooks of one series face their opening to the hooks of the other series.

Thus the band 2 comprises a first line of hooks, preferably regularly spaced, along the visible longitudinal edge 4 of the band 2 and a second line of hooks, preferably regularly spaced, along the masked longitudinal edge of the band 2 .

These lines of hooks are parallel to each other. Each line of hooks forms a series of anchor points. The series 7 of anchoring points arranged along the masked longitudinal edge of the strip is spaced from the edge of said edge by a distance at least equal to the width of the overlapping connection zone 6 formed by superposition of the longitudinal edges. in the wound state of the band around the tubular body 1.

Each holding clip 3 is formed of at least two loops 3A, 3B linked together, the first loop 3A being adapted to engage with an anchoring point 9 or hooking of each series 7, 8 points in wrapping position of the band 2 to form an anchor points 9 bonding loop, the second loop 3B forming a traction ring to assist in the establishment of the first loop 3A.

Generally, each holding fastener 3 is made using a noncombustible link.

• Dans un premier temps, on passe la première boucle 3A dans un crochet de la première série de points d'ancrage, puis on exerce une traction sur ladite boucle 3A à l'aide de l'anneau de traction formé par la seconde boucle 3B pour étirer la première boucle 3A et amener l'un de ses bords au voisinage d'un point d'ancrage de la deuxième série de points d'ancrage jusqu'à venir en prise avec ledit point d'ancrage formé à nouveau par un crochet. L'attache est alors posée et maintient, à ce niveau, la bande à l'état enroulé.

Thus, for the installation of such a fastener, the strip being wound around the tubular body formed here by the assembly of tube sections, the procedure is as follows:

• In a first step, the first loop 3A is passed through a hook of the first series of anchoring points, and then traction is exerted on the said loop 3A using the traction ring formed by the second loop 3B for stretching the first loop 3A and bringing one of its edges near an anchor point of the second set of anchor points to engage said anchor point formed by a hook again. The fastener is then placed and maintains, at this level, the tape in the wound state.

To facilitate the laying of the strip, the strip 2 is, at each of its longitudinal edges 4, 5 of reduced thickness in the manner of a notch, said notches 10 extending one above the other. other, below the plane, said horizontal, median of the strip 2 in the state positioned flat of said strip 2.

Thus, in the wound state of the band, the bottom of the notches are likely to come against each other.

In other words, the strip 2 has at each of its edges 4, 5 longitudinal a recess formed by reducing the thickness of the strip, said recesses extending one above, the other, below the plane, said horizontal, median of the strip 2 in the state positioned flat of said strip 2.

This design makes it possible to reduce the thickness of the overlapping bonding zone 6.

Generally, the strip 2 is a thermally insulating strip which is at least in the form of two layers of glass fabric between which are interposed two sheets based on alkaline earth silicate fibers. Band 2 is said to be incombustible.

To facilitate the fixing of the strip 2 at one of the ends, said upper end, of the tubular body 1, and corresponding to the first tube section, that is to say to the said upper tube section forming the one end of the assembly of tube sections in the case of a tubular body made in the form of an assembly, one 11 of the edges 11, 12 transverse, said upper transverse edge 11, of the strip 2 is provided means 13 hooking to the end, said upper said tubular body 1 for holding the band 2 in the suspended state to the tubular body 1.

In the examples shown, these hooking means 13 are formed of inverted U-shaped hooks spaced apart along the transverse edge of the strip 2.

These U-hooks are fixed by simply fitting on the end edge of the tubular body, in this case the upper tube section in the manner of suspension hooks.

To complete this assembly, a covering cap 15, generally made of metal, is attached by interlocking at the end of the tubular body, in this case the upper tube section thus preventing inadvertent release of the hooking means 13 of the band 2

The tubular body 1 has an ovoid cross section.

This arrangement has the advantage of allowing the renovation of rectangular pipe.

Each tube section is generally made of metal, in particular stainless steel.

Generally, said strip 2 is, before laying, stored in the wound state.

• Dans le cas d'un corps 1 tubulaire formé par assemblage de sections de tube, on assemble, dans un premier temps, au moins deux sections de tube en les introduisant dans le conduit d'évacuation de fumée existant après avoir accroché, à l'aide des moyens d'accrochage, une extrémité de la bande à l'extrémité de la section de tube dite supérieure de l'assemblage. On enroule la bande autour de l'assemblage de sections de tube et on fixe au moins une attache. On rajoute une nouvelle section de tube à l'assemblage de sections de tube et on enroule la bande, qui se déroule de sa bobine, autour de la section de tube nouvellement assemblée. On fixe au moins une nouvelle attache. On rajoute à nouveau une section de tube puis on enroule la bande autour de la sections de tube nouvellement assemblée et on fixe au moins une nouvelle attache.

The pose is therefore as follows:

• In the case of a tubular body 1 formed by assembling sections of tube, at least two tube sections are first assembled by introducing them into the existing smoke evacuation duct after having hung on the tube. using hooking means, one end of the strip at the end of the so-called upper tube section of the assembly. The strip is wrapped around the assembly of tube sections and at least one fastener is fixed. A new section of tubing is added to the tubing section assembly and the band, which unrolls from its spool, is wound around the newly assembled tube section. At least one new fastener is attached. A section of tubing is added again and then the band is wrapped around the newly assembled tube sections and at least one new clip is fixed.

These operations are repeated until reaching the desired length of conduit. If the length of the strip is greater than the length of the tube section assembly, once the length of pipe is reached, the excess strip length is cut.

If the length is less, we proceed to join a second band.

In the case of a tubular body 1 formed by a flexible duct, the flexible duct is engaged by a vertical traction means in the existing smoke evacuation duct after hooking, with the aid of the attachment means, a end of the strip at the end of said flexible conduit. The strip is wrapped around said duct and at least one fastener is fixed. The flexible duct is drawn upwardly within the existing duct by the previously installed pulling means and the strip, which unwinds from its reel, is wound around the newly engaged flexible duct portion. At least one new fastener is attached. We engage a new portion of the flexible conduit and then rolls the band around the newly engaged conduit portion and attaches at least one new fastener. These operations are repeated until reaching the desired length of conduit.

Claims (10)

1. A retrofit smoke evacuation conduit designed to be installed in an existing evacuation conduit,
   said retrofit smoke evacuation conduit comprising at least one metal tubular body (1) and one covering device designed to cover said tubular body (1) from the outside, said covering device comprising at least one strip (2) with a width larger than the perimeter of the tubular body (1) to be covered and fasteners (3) for maintaining said strip (2) able to keep said strip (2) in a so-called surrounding position in which the strip (2) extends axially along said tubular body (1) and surrounds said tubular body (1) with one (4) of its longitudinal edges (4, 5), called visible edge, covering the other longitudinal edge (5), called hidden edge, to form a covering connecting zone (6), said strip (2) comprising, on its outer face, at least two series (7, 8) of anchoring or catching points (9) adjoining each longitudinal edge (4, 5) of the strip, said series (7, 8) of anchoring or catching points (9) being positioned so as to extend on either side of the visible longitudinal edge (4) of the strip (2) in the wound state of the strip (2) in its surrounding position around the tubular body (1), characterized in that each maintaining fastener (3) is able, in said surrounding position, to connect an anchoring point (9) of one series (7) to an anchoring point (9) of the other series (8) by straddling the visible longitudinal edge (4) of said strip (2).
2. The retrofit smoke evacuation conduit according to claim 1,
   characterized in that said tubular body (1) has an ovoid cross-section.
3. The retrofit smoke evacuation conduit according to claims 1 and 2,
   characterized in that the anchoring or catching points (9) of the series (7, 8) of anchoring or catching points (9) of the strip (2) assume the shape of hooks.
4. The retrofit smoke evacuation conduit according to claim 3,
   characterized in that the hooks are generally C-shaped and in that, in the state of the strip (2) positioned flat, the hooks of one series face the hooks of the other series by their opening.
5. The retrofit smoke evacuation conduit according to one of claims 1 to 3,
   characterized in that each maintaining fastener (3) is formed by at least two loops (3A, 3B) connected to each other, the first loop (3A) being able to engage with an anchoring or catching point (9) of each series (7, 8) of points in the surrounding position of the strip (2) to form a connecting loop of the anchoring points (9), the second loop (3B) forming a pulling ring to assist with placement of the first loop (3A).
6. The retrofit smoke evacuation conduit according to one of claims 1 to 5,
   characterized in that each maintaining fastener (3) is made using an incombustible link.
7. The retrofit smoke evacuation conduit according to one of claims 1 to 6,
   characterized in that the strip (2) has, at each of its longitudinal edges (4, 5), a reduced thickness like a slotting, one of said notches (10) extending above, the other below the so-called horizontal, median plane of the strip (2) in the state of said strip (2) positioned flat.
8. The retrofit smoke evacuation conduit according to one of claims 1 to 7,
   characterized in that the strip (2) is a thermally insulating strip assuming at least the form of two layers of glass cloth between which two fiber-based plies of alkaline-earth silicate are interposed.
9. The retrofit smoke evacuation conduit according to one of claims 1 to 8,
   characterized in that one (11) of the transverse edges (11, 12), called upper transverse edge (11), of the strip (2) is provided with catching means (13) at a so-called upper end of the tubular body (1) in order to keep the strip (2) in its state suspended from the tubular body (1).
10. The retrofit smoke evacuation conduit according to one of claims 1 to 9,
    characterized in that said strip (2) is stored in the wound state before placement.

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