Endothermic module and passive fire protection device including such a module.

Abstract

The present invention relates to an endothermic module (1) for a wrapping and passive fire protection device for an element to be protected. This module is remarkable in that it extends along a longitudinal axis (X-X'), in that it comprises two rectangular sections (11, 12) of a fire-resistant, locked-mesh fabric, in that the two sections (11, 12) of fabric are joined so that their respective long sides are parallel to the longitudinal axis (X-X') of the module (1) and are sewn together to form a plurality of closed, oblong storage pockets (13) with longitudinal axis (Y-Y'), these storage pockets (13) being parallel to each other along their longitudinal sides, and the longitudinal axes (Y-Y') of these storage pockets (13) being perpendicular to the longitudinal axis (X-X') of the endothermic module (1), and in that at least one of these storage pockets (13) is filled with an endothermic material (100) in the form powdery.Figure for the summary: Fig. 2.

Description

Title of the invention: Endothermic module and passive fire protection device comprising such a module. FIELD OF INVENTION

[0001] The invention is in the field of fire protection.

[0002] The present invention relates to an endothermic module and a passive fire protection device comprising such a module. Such a protection device makes it possible to protect an element to be protected against fire.

[0003] By “passive fire protection”, it is understood that this device plays a preventive role in protecting said element to be protected, by enabling it to withstand a fire for a given period, generally fixed by the regulations of the place where this element to be protected is located.

[0004] The term "element to be protected" refers primarily to a cable tray, but also, for example, to an air duct or a pipe.

[0005] A "cable tray" is a support device that allows one or more cables, for example electrical, computer network, or multimedia cables, to be accommodated. Such a cable tray is generally attached to the walls (walls, floors, ceilings) of a room. It can be used, for example, in the building, industrial, and nuclear power plant sectors.

[0006] Preferably, the cable tray has the form of a longitudinal gutter, preferably capped with a cover, this gutter receiving the cables.

[0007] The cables which are arranged in these cable trays must be passively protected against fire. STATE OF THE ART

[0008] A method for fire protection of a cable tray is already known from document WO 2021 / 023946. This method consists of assembling several square or rectangular cushions around the cable tray, each cushion having an internal thermal insulation lining. Each cushion is equipped with hook and loop fasteners on its edges, and the various rigid or semi-rigid cushions are joined together using these hook and loop fasteners.

[0009] However, these cushions have limited flexibility, and such an assembly method has the disadvantage of requiring the cushions to be handled and assembled one by one, which is time-consuming. Furthermore, the result is unsatisfactory because there are numerous gaps between the cushions, and flames can penetrate them, as shown in the figures in this document. Finally, such a protection method is not suitable for protecting cable trays exhibiting numerous bends or complex shapes because the cushions do not have the ability to conform well to these complex shapes.

[0010] In the prior art, a passive protection system of the wrapping type is also known, which consists of wrapping, that is to say, surrounding, the entire length of a cable tray and the cables thereon, using a protection system made of fire-resistant material.

[0011] Some of these protection systems use a powdered endothermic product mixed with glue, then this mixture is applied in layers on a thermal insulation of the mineral wool type, for example by roller, brush or spatula, then this thermal insulation is wrapped around the cable tray.

[0012] However, this process has many drawbacks, which are mentioned below.

[0013] First of all, there are implementation constraints.

[0014] Indeed, the endothermic adhesive / powder mixture must be prepared on-site, its homogeneity is not necessarily guaranteed or reproducible, and its preparation is time-consuming. The mixture is applied on-site, which necessitates protecting the surrounding installations and the operator. This mixture must be applied as a layer of a certain thickness to comply with fire protection recommendations, but a manual technique is difficult to reproduce. In addition, the adhesive adds weight to the mixture. Finally, the mixture has a limited shelf life due to the drying or settling of the adhesive and must be used quickly.

[0015] There are also constraints on interaction with the environment.

[0016] Indeed, the adhesive used in the mixture is not fire-resistant and can reduce or degrade the performance of the endothermic product. Furthermore, the adhesives used in this adhesive / endothermic powder mixture contain aluminum and / or alumina. For the protection of an element (cable tray or other) located in a building housing a nuclear reactor, this is unacceptable.

[0017] Finally, there are constraints related to the dismantling and recycling of this wrapping, as well as to the generation of waste, for example when adding a new cable in an existing cable tray.

[0018] The adhesive in the endothermic glue / powder mixture dries and becomes rigid, making it impossible to remove without damage. Furthermore, removing the wrapping is a lengthy, complicated, and tedious process, with a risk of damaging the corrosion protection of the cable trays or the cables themselves, which remain live.

[0019] Since the mixture is applied to fibrous thermal insulation, the endothermic product can no longer be separated from this insulation for reuse or recycling. Finally, when applying the mixture, it is necessary to protect other nearby equipment and the operator, as described above, and to use plastic sheeting, safety glasses, and gloves. For this application, they must be treated as radiological waste if this wrapping takes place in a nuclear zone. Description of the invention

[0020] The invention therefore aims to provide an endothermic module which allows an endothermic product to be positioned around the element to be protected, ensuring a homogeneous and regular distribution of this product and ensuring the maintenance of this homogeneous distribution over time.

[0021] Another object of the invention is to provide an endothermic module sufficiently flexible to adapt and conform to the contours of the elements to be protected, including for example tortuous cable trays.

[0022] Another object of the invention is to provide an endothermic module that can be prefabricated and handled simply, without generating dirt for the operator or the environment of use.

[0023] Another object of the invention is to provide an endothermic module whose endothermic product is not mixed with glue, for example, so that its performance is not degraded and that this module can be easily recycled and reused.

[0024] Finally, an object of the invention is to be able to integrate this endothermic module into a passive fire protection device, which can, if necessary, be easily dismantled after its installation around an element to be protected, and then be easily put back in place, all without damage.

[0025] For this purpose, the invention relates to an endothermic module for a wrapping and passive fire protection device for an element to be protected.

[0026] According to the invention, this module extends along a longitudinal axis, it comprises two rectangular strips of a fire-resistant, locked mesh fabric, the two strips of fabric are assembled so that their respective long sides are parallel to the longitudinal axis of the module and are sewn together to form a plurality of closed storage pockets, oblong in shape and with a longitudinal axis, these storage pockets being parallel to each other along their longitudinal sides, and the longitudinal axes of these storage pockets being perpendicular to the longitudinal axis of the endothermic module and at least one of these storage pockets is filled with an endothermic material in powder form.

[0027] Thanks to these features of the invention, the endothermic product is well distributed in the storage pockets, which ensures a good proportion of product per square meter. Furthermore, the endothermic product is contained and protected within the pockets of the module, and the module can be handled without special precautions.

[0028] Finally, the module is flexible along the pocket seams, which facilitates its assembly. rolling around the element to be protected.

[0029] According to other advantageous and non-limiting features of the invention, taken alone or in combination:

[0030] - at least one of the oblong storage pockets is subdivided into several sub- storage pockets by separation seams, which are perpendicular to the longitudinal axis of this oblong storage pocket;

[0031] - the fire-resistant, locked mesh fabric is chosen from a fabric exhibiting a fire classification Ml or MO and allowing only water vapor released by the endothermic material to pass through when the endothermic module is subjected to a temperature greater than or equal to 100°C;

[0032] - the endothermic material in powder form is chosen from metasilicate sodium and calcium metasilicate.

[0033] The invention also relates to a device for wrapping and passively protecting against fire of an element to be protected, in particular a cable tray, an air duct or a pipe.

[0034] According to the invention, this device comprises a flexible mattress, which includes at least one endothermic module as mentioned above and at least one layer of a thermal insulating material, this mattress is surrounded by a fire-resistant, blocked mesh fabric cover, this mattress has a longitudinal axis Xl-X' 1, an inner longitudinal end and an opposite outer longitudinal end, the longitudinal axis Xl-X' 1 of the mattress being perpendicular to the longitudinal axis Y-Y' of the storage pockets of the endothermic module, the mattress includes at its inner longitudinal end, a removable hooking device configured to allow the mattress to be hooked onto the element to be protected, and the mattress also includes a removable fixing device, configured to allow the mattress to be held in a so-called "wrapped" position, in which said mattress is wrapped around said element to be protected and is wrapped around itself.

[0035] According to other advantageous and non-limiting features of the invention, taken alone or in combination:

[0036] - the thermal insulation material is mineral wool or silicone foam;

[0037] - the removable fastening device includes a strap having a first end and a second end, in that said second end of the strap is provided with a first attachment device, in that said first end of the strap is fixed to the inner longitudinal end of the mattress and is provided with a second attachment device, and in that the first attachment device and the second attachment device are complementary attachment devices, such as a piece of fabric bearing hooks and a piece of fabric bearing loops or two pieces of repositionable adhesive or a hook and a ring;

[0038] - the mattress includes at its outer longitudinal end, a strip of fabric silicone-coated, airtight and decontaminable;

[0039] - the removable fastening device is fixed to the outer longitudinal end of the mattress or on the silicone fabric strip, airtight and decontaminable;

[0040] - the removable fastening device comprises a first removable fastening member and a second removable fastening element which are fastening elements complementary to each other, such as a piece of fabric bearing hooks and a piece of fabric bearing loops or two pieces of repositionable adhesives or a hook and a ring. DESCRIPTION OF THE FIGURES

[0041] Other features, objectives and advantages of the invention will become apparent from the following description, which is purely illustrative and not limiting, and which should be read in conjunction with the accompanying drawings on which:

[0042] Fig. 1 is a diagram representing a manufacturing step of the endothermic module according to the invention.

[0043] Fig. 2 is a diagram representing a first embodiment of the en-dothermic module according to the invention, on which part of this module has been truncated.

[0044] Fig. 3 is a diagram representing a second embodiment of the endothermic module according to the invention.

[0045] Fig. 4 is a perspective view of a wrapping and passive fire protection device according to the invention and incorporating the endothermic module.

[0046] Fig. 5 is a cross-sectional view of the wrapping and passive fire protection device of Fig. 4, taken along the cutting plane passing through line VV in Fig. 4.

[0047] Fig. 6 is a diagram representing in perspective and partial section the wrapping and passive fire protection device, wrapped around an element to be protected.

[0048] Fig. 7 is a diagram representing a particular application of the wrapping and protection device according to the invention, in order to create fire propagation barriers on a cable tray.

[0049] Fig. 8 is a diagram representing a particular application of the wrapping and protection device according to the invention, allowing a thermal sleeve to be made on a sealed through-hole. DETAILED DESCRIPTION OF THE INVENTION

[0050] The endothermic module 1 will now be described in more detail in connection with figures 1 to 3. This module is intended to be used in a device 2 for wrapping and passive fire protection of an element to be protected A.

[0051] This element to be protected A is preferably a cable tray, as shown in Figures 4 and 6 and 7, but can also be, for example, a pipe, as shown in [Fig.8] or an air duct or any other elongated element.

[0052] The endothermic module 1 comprises two strips 11 and 12 of fire-resistant, blocked mesh fabric, which are superimposed and sewn together to form a plurality of closed, oblong-shaped storage pockets 13.

[0053] The two fabric strips 11 and 12 can be made up of two different sheets of fabric or be formed from a single sheet folded in half.

[0054] The term "locked mesh fabric" (or "locked mesh fabric") refers to a fabric in which the warp and weft threads are bonded at their intersection (at their point of crossing). Such a fabric has the advantage of not fraying if torn due to the locking of the mesh, thus limiting damage and preventing it from affecting other adjacent pockets.

[0055] Preferably, this fire-resistant, locked-mesh fabric is chosen from fabrics with a fire rating of M1 or M0. According to the classification of material flammability, M1 designates a fabric that is combustible but non-flammable and does not emit smoke in the event of a fire. M0 designates a fabric that is non-combustible and non-flammable. The fabric is, for example, a mesh tulle comprising 100% cotton, or cotton and up to 5% polyester. The endothermic modulus 1 has a longitudinal axis X-X'. Preferably, the two fabric panels 11 and 12 are rectangular in shape, and this longitudinal axis X-X' extends along the longitudinal direction of these rectangles (in other words, the respective longer sides 110, 120 of the rectangular panels 11, 12 are parallel to the axis X-X').

[0056] Each storage pocket 13 being oblong in shape, it has a central longitudinal axis Y-Y'. As can be seen in the figures, the various storage pockets 13 are parallel to each other along their respective longitudinal sides. In other words, the central longitudinal axes Y-Y' of each oblong pocket 13 are parallel to each other. Furthermore, preferably, the central longitudinal axes Y-Y' of each pocket 13 are perpendicular to the longitudinal axis X-X'.

[0057] Each storage pocket 13 is thus delimited by two parallel seams 14, called "transverse" because they extend across the width of the panels 11 and 12 and by two end seams 15. The seams 14 are perpendicular to the longitudinal axis X-X' and the seams 15 are parallel to it.

[0058] At least one of the storage pockets 13 of the endothermic module 1, and preferably all of the storage pockets 13, are filled with an endothermic material 100, (see [Fig.2] where one of the pockets 13 has been shown truncated).

[0059] During manufacturing, the pockets 13 are sewn on three sides, the endothermic material 100 is inserted into them, and then the last seam is made.

[0060] The endothermic material 100 is inserted into the pockets 13 in powder form, i.e., it is free of a binder such as glue. This prevents any negative interactions with the fire protection effect. This endothermic material does not contain alumina, which allows its use in a building containing a nuclear reactor. Preferably, the pockets 13 contain exclusively endothermic material 100.

[0061] By "endothermic material" is meant a material having the property of absorbing heat in case of fire and emitting water vapor when subjected to a temperature greater than or equal to 100 °C.

[0062] In addition, the fact that the pockets 13 are made of blocked mesh fabric has the advantage that this fabric can allow the water vapor thus produced to pass through.

[0063] This water vapor can then be retained by a thermal insulating material, disposed nearby, as will be described later in the wrapping and passive fire protection device 2 according to the invention.

[0064] This phenomenon of water vapor production makes it possible to delay the progression of the heat of a fire, from the outside to the inside of the wrapping and therefore towards the element to be protected A.

[0065] Preferably, the endothermic material 100 is chosen from sodium metasilicate and calcium metasilicate, preferably tri- or pentahydrated sodium metasilicate

[0066] The dimensions of the storage pouch 13 are a function of the distance DI between the two transverse seams 14 which delimit the pouch 13 on either side, and of the width 1 of the endothermic module 1 which corresponds substantially to the length of the oblong pouch 13.

[0067] These dimensions of the storage pockets 13 are calculated so that, once completely filled, the quantity of endothermic product 100 per square meter corresponds to the expected fire resistance performance. This quantity of endothermic product 100 also has an impact on the weight of module 1 and, to a lesser extent, on the thickness E of module 1.

[0068] By way of purely illustrative example, this quantity of product is for example between 2 kg and 8 kg per m2, preferably equal to 4 kg / m2.

[0069] Preferably, the width 1 of the endothermic module 1 is between 300 mm and 600 mm.

[0070] Preferably, the distance DI between the two transverse seams 14 which delimit the pocket 13 is between 10 mm and 50 mm.

[0071] Preferably, the thickness E of the endothermic module 1 is between 6 mm and 20 mm.

[0072] According to an alternative embodiment shown in [Fig. 3], it is possible to subdivide one or more of the oblong storage pockets 13 into several sub-storage pockets 130 by making separation seams 16. Preferably, these separation seams 16 are parallel to the seams 15 and to the longitudinal axis X-X'.

[0073] Such separation seams 16 ensure that the endothermic product remains in place over time, particularly when the element to be protected A is vertical. Indeed, in this case, and as will be described in more detail later, the oblong storage pouches 13 of module 1, inserted into the wrapping device 2, are arranged so that their respective longitudinal axes Y-Y' are vertical. The separation seams 16 then maintain the homogeneity of the product 100, preventing all the endothermic product from settling at the bottom of the vertically oriented pouch 13.

[0074] The wrapping and passive fire protection device 2 of an element to be protected will now be described in more detail in connection with figures 4 to 6.

[0075] This device 2 has a longitudinal axis Xl-X' 1. It includes a flexible mattress 3 also with a longitudinal axis Xl-X' 1.

[0076] In the cross-sectional view of [Fig.5], it can be seen that this flexible mattress 3 comprises at least one endothermic module 1 and at least one layer of a thermal insulating material 30. By way of purely illustrative example, it can be seen in this figure that the mattress 3 here comprises two endothermic modules 1, each of them being inserted between two layers 30, so that the mattress 3 comprises three layers 30.

[0077] The thermal insulating material constituting layer 30 is chosen from fibrous type insulators, for example mineral wool or non-fibrous type insulators, for example silicone foam.

[0078] The thickness of each of the modules 1 and of each of the layers 30 of thermal insulating material, as well as the number of these modules and these layers, are adapted according to the fire resistance performance required for the mattress 3.

[0079] The soft mattress 3 is surrounded by a cover 31, made of fire-resistant, locked-mesh fabric, preferably chosen from fabrics having a fire rating of M1 or M0. This fabric is, for example, a mesh tulle comprising 100% cotton, i.e., cotton and up to 5% polyester.

[0080] The length L1 of the mattress 3 is identical to the length L of each endothermic module 1, or almost identical (except for the thickness of the envelope 31).

[0081] The length L1 of the mattress 3 is adapted to the dimensions of the perimeter of the element to be protected A, since the wrapping and passive fire protection device 2 is intended to be wrapped (taped) around this element to be protected. Preferably, this length L1 is equal to the perimeter of the element to be protected, plus an overlapping length, which overlaps the first turn of the mattress, already wrapped around the element to be protected A.

[0082] Inside the mattress 3, the endothermic module(s) 1 is / are arranged so that the longitudinal axes Y-Y' of the storage pockets 13 are perpendicular to the longitudinal axis Xl-X'l of the flexible mattress 3. This particular arrangement facilitates the rolling of the mattress 3 around the element to be protected.

[0083] Indeed, as can be seen in [Fig. 6], the element to be protected A has a longitudinal axis Y1-Y'1. By wrapping the mattress 3 around the element to be protected A, so that its longitudinal axis X1-X'1 is perpendicular to the longitudinal axis Y1-Y'1, the oblong pockets 13 with longitudinal axes Y-Y' become parallel to the longitudinal axis Y1-Y'1 of the element to be protected A. As a result, the transverse seams 14, which constitute thinner areas of the endothermic module 1 and are therefore foldable (deformable), are also parallel to the longitudinal axis Y1-Y'1 of the element to be protected A. The mattress 3, wrapped around the element to be protected A, thus conforms better to the contour of this element.

[0084] Preferably also the length L1 of the mattress 3, measured along the longitudinal axis Xl-X' 1 is greater than the width 11 of it.

[0085] Furthermore, it is also possible to provide at one of the ends 32 of the mattress 3, called the "inner longitudinal end", a removable attachment device 4 for attaching to the element to be protected A. Such a device 4 makes it possible to keep the inner longitudinal end 32 of the mattress immobile against the element to be protected, before starting to roll the mattress 3 around this element to be protected A. By "removable attachment", it is understood that this device can be attached to or detached from the element to be protected.

[0086] A possible embodiment of this fastening device 4 will now be described. This device 4 comprises a strap 40, having two opposite ends, namely a first end 41 and a second end 42. The strap 40 is fixed by its first end 41 to the inner longitudinal end 32 of the mattress.

[0087] Furthermore, this strap is provided at its second end 42 with a first fastening member 43 and at its first end 41 with a second fastening member 44. The fastening members 43 and 44 are configured to cooperate with each other. Preferably, the first fastening member 43 is located on one of the two faces of the strap 40, while the second fastening member 44 is located on the other of its two faces.

[0088] The fastening elements 43 and 44 are, for example:

[0089] -a piece of fabric bearing hooks and a piece of fabric bearing loops, known for example under the brand name Velcro,

[0090] -two pieces of repositionable adhesive material, or

[0091] -a hook and a ring.

[0092] Advantageously, and as shown in [Fig.4], the mattress 3 may have at its outer longitudinal end 33 (opposite to its end 32), a strip of fabric 5, formed for example of a silicone fabric, airtight and decontaminable.

[0093] When the mattress 3 is rolled around the element to be protected A, this strip of fabric 5 is at the end of the roll and therefore outside of it and protects the whole of it, (see arrow F on [Fig.4], which symbolizes the orientation of this roll).

[0094] Preferably, the mattress 3, or the fabric strip 5 if present, is also equipped with a removable fastening device 6. This device 6 allows the mattress 3 to be held in a so-called "wrapped" position, that is to say, a position in which the mattress 3 is wrapped around the element to be protected A and is rolled up on itself.

[0095] By "removable fixing" it is understood that this device can be fixed to hold the mattress 3 (and the fabric strip 5 if present) in the wrapped position or be undone, to unroll the mattress 3 and the fabric strip 5 if present.

[0096] The removable fastening device 6 comprises a first removable fastening member 61 and a second removable fastening member 62 which are fastening members complementary to each other.

[0097] Preferably, the first removable fastening member 61 is fixed to one of the two faces of the fabric strip 5, while the second removable fastening member 62 is fixed to the other of the two faces of the fabric strip. The arrangement can be transverse as shown in [Fig. 4] or longitudinal.

[0098] The fastening elements 61 and 62 are, for example:

[0099] -a piece of fabric bearing hooks and a piece of fabric bearing loops, known for example under the brand name Velcro,

[0100] -two pieces of repositionable adhesive material, or

[0101] -a hook and a ring.

[0102] Although not shown in the figures, the removable fastening device 6 may also include a strap similar to the strap 4, on which the first removable fastening member 61 and the second removable fastening member 62 are attached, this strap being attached to the free end of the fabric 5.

[0103] Finally, although this is not shown in the figures either, in the absence of the fabric strip 5, the first removable fixing member 61 and the second removable fixing member 62 and possibly this strap can be fixed directly onto the mattress 3.

[0104] Regardless of the embodiment chosen, the first removable fastening member 61 and the second removable fastening member 62 are positioned relative to each other so as to be able to cooperate with each other when the mattress 3 is wrapped around said element to be protected A and is rolled up on itself and possibly when the fabric strip 5, if present, is wrapped around said mattress 3.

[0105] In addition to using the wrapping device 2 for the protection of an element to be protected such as a cable tray, already described in connection with Figures 4 and 6, it is also possible to provide for other uses of this device, for example use as a fire propagation screen on an element to be protected, such as a cable tray, (see [Fig.7]) or use as a thermal sleeve, (see [Fig.8]).

[0106] In [Fig. 7], it can be seen that two wrapping devices 2 are arranged at a certain distance from each other around the element to be protected A, so as to segment it. This limits the possibility that the materials constituting the cables could serve as fuel for the fire. In other words, the zone Z between two consecutive wrapping devices 2 is sacrificed in the event of a fire starting in this zone, but the fire does not spread beyond it.

[0107] In [Fig. 8], it can be seen that the element to be protected A, here a pipe, passes through a wall B, which has been sealed in part C (caulking). At the point where it passes through wall B, the wrapping device 2 is wrapped around the pipe and thus helps to prevent the transmission of fire from one side of wall B to the other.

[0108] Device 2 has many advantages. It is flexible, as previously explained, which facilitates its use when coiled. It can be stored ready for use. There is no need to protect the operator handling it, nor the environment in which it is installed.

Claims

Demands

1. Endothermic module (1) for wrapping and passively protecting a fire-resistant element, characterized in that it extends along a longitudinal axis (X-X'), in that it comprises two rectangular panels (11, 12) of a fire-resistant, locked-mesh fabric, in that the two panels (11, 12) of fabric are joined so that their respective long sides (110, 120) are parallel to the longitudinal axis (X-X') of the module (1) and are sewn together to form a plurality of closed, oblong storage pockets (13) with longitudinal axis (Y-Y'), these storage pockets (13) being parallel to each other along their longitudinal sides, and the longitudinal axes (Y-Y') of these storage pockets (13) being perpendicular to the longitudinal axis (X-X') of the module endothermic (1), and in that at least one of these storage pockets (13) is filled with an endothermic material (100) in powder form.

2. Endothermic module (1) according to claim 1, characterized in that at least one of the oblong storage pouches (13) is subdivided into several sub-storage pouches (130) by separation seams (16), which are perpendicular to the longitudinal axis (Y-Y') of this oblong storage pouch (13).

3. Endothermic module (1) according to claim 1 or 2, characterized in that the fire-resistant, locked mesh fabric is selected from a fabric having a fire rating of M1 or M0 and allowing only water vapor released by the endothermic material (100) to pass through when the endothermic module (1) is subjected to a temperature greater than or equal to 100°C.

4. Endothermic modulus (1) according to any one of the preceding claims, characterized in that the endothermic material (100) in powder form is selected from sodium metasilicate and calcium metasilicate.

5. A device for wrapping and passively protecting against fire (2) an element to be protected (A), in particular a cable tray, an air duct or a pipe, characterized in that it comprises a flexible mat (3), which comprises at least one endothermic module (1) according to any one of claims 1 to 4, and at least one layer of a thermal insulating material (30), -in that this mattress (3) is surrounded by a cover (31) of blocked mesh fabric, fire resistant, -in that this mattress (3) has a longitudinal axis (Xl-X'l), an inner longitudinal end (32) and an opposite outer longitudinal end (33), the longitudinal axis (Xl-X'l) of the mattress (3) being perpendicular to the longitudinal axis (Y-Y') of the storage pockets (13) of the endothermic module (1), -in that the mattress (3) includes at its inner longitudinal end (32), a removable hanging device (4) configured to allow the mattress to be hung on the element to be protected (A), -and in that the mattress (3) also includes a removable fixing device (6), configured to allow the mattress (3) to be held in a so-called "wrapped" position, in which said mattress (3) is wrapped around said element to be protected (A) and is wrapped around itself.

6. Wrapping device according to claim 5, characterized in that the thermal insulating material (30) is mineral wool or silicone foam.

7. Wrapping device according to claim 5 or 6, characterized in that the removable fastening device (4) comprises a strap (40) having a first end (41) and a second end (42), in that said second end (42) of the strap is provided with a first fastening member (43), in that said first end (41) of the strap is fixed to the inner longitudinal end (32) of the mattress (3) and is provided with a second fastening member (44), and in that the first fastening member (43) and the second fastening member (44) are complementary fastening members, such as a piece of fabric bearing hooks and a piece of fabric bearing loops or two pieces of repositionable adhesive or a hook and a ring.

8. Wrapping device according to any one of the preceding claims, characterized in that the mattress (3) comprises at its outer longitudinal end (33), a band of silicone-coated, airtight and decontaminable fabric (5).

9. Wrapping device according to any one of the preceding claims, characterized in that the removable fastening device (6) is fixed to the outer longitudinal end (33) of the mattress (3) or to the silicone-coated, airtight and decontaminable fabric strip (5).

10. Wrapping device according to any one of the preceding claims, characterized in that the removable fastening device (6) comprises a first removable fastening member (61) and a second removable fastening member (62) which are fastening members complementary to each other, such as a piece of fabric bearing hooks and a piece of fabric bearing loops or two pieces of repositionable adhesives or a hook and a ring.

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