EP0524078B1 - Fire arrester barrier of a wall opening for the passage of temporary connection pipes - Google Patents

Description

The present invention relates to devices for traversing walls of premises making it possible to pass through said walls by electric cables or flexible pipes conducting fluid, temporary.

It is important when temporarily interrupting the normal supply of a part or section of an installation to be able to pass through this section of electrical conductors or extension cords to supply different materials or tools, or even flexible pipes of air supply or the like.

The simplest arrangement used in the past was to leave ajar the connecting doors of the premises in which the supply was interrupted with premises from which energy was available and to pass the various cables through the doors kept ajar by wedges.

Such a way of operating has a certain number of drawbacks.

Maintaining the ajar connecting doors leads to non-compliance with the partitioning of separation between various zones of an installation.

The untimely closing of the doors involves risks of damage to the electric cables or even to the electrical control panels to which they are connected.

Half-opened doors increase the potential risk of fire spreading.

In addition, within the limits of the aforementioned areas, fire protection doors or flame protection doors are generally installed.

The regulations relating to these doors specify that they must remain closed.

The use of ajar doors to pass cables and temporary connecting conduits goes to contravenes these regulations and renders fire doors ineffective.

FR-A-2.158.599, forming the preamble of claim 1, describes a fire-stoppering device for pneumatic transport circuits comprising at the crossing locations of floors, ceilings and the like, at least one heat-resistant sleeve ensuring the connection of the circulation tubes of the pneumatic circuit, said connection sleeve being provided with a closure member retained in the open position by a fusible element and biased in the closed position by an elastic return member.

The invention aims to remedy the drawbacks of known solutions by creating a device for passing temporary supply cables or pipes through a partition between two zones of an installation, which meets the criteria for partitioning between zones, which is free of risks of deterioration of the routing of cables or conduits and which allows the maintenance of the doors of connection between zones in closed position.

It therefore relates to a fire protection device for ensuring passage through a partition wall between two zones of an installation, cables and / or flexible conduits for supplying electrical or other energy, comprising, provided in the wall, a passage opening out on the two faces of the latter and in which are arranged two metal half-sleeves, each provided at its end external to the wall, with a closing flap, articulated on the corresponding half-sleeve, characterized in that the two metal half-sleeves are separated by an interval, preventing the formation of a thermal bridge, and in that the closing flap of each sheath is a closing flap by gravity, provided with a plug in composite fire-resistant product.

• la Fig. 1 est une vue schématique en coupe d'un dispositif coupe-feu suivant l'invention placé dans un mur en béton plein ;
• la Fig. 2 est une vue analogue à celle de la Fig. 1 montrant une phase de préparation d'un mur en moellons creux en vue de la pose du dispositif suivant l'invention ;
• la Fig.3 montre le dispositif suivant l'invention posé dans un mur en moellons creux;
• la Fig.4 représente en coupe un dispositif préfabriqué;
• la Fig.5 est une vue en coupe d'un mur en moellons creux destiné à recevoir le dispositif préfabriqué de la Fig.4;
• la Fig.6 est une vue en coupe du dispositif suivant l'invention monté dans un mur pourvu d'un joint de dilatation intermédiaire;
• les Fig.7 et 8 sont des vues partielles en coupe d'un dispositif suivant l'invention traversé par des câbles, respectivement avant et après un incendie;
• la Fig.9 est une vue de face à plus grande échelle d'un volet de fermeture équipant un demi-fourreau du dispositif suivant l'invention;
• les Fig.10 et 11 sont respectivement des vues de côté de deux variantes de demi-fourreaux à volet; et
• la Fig.12 est une vue latérale en coupe d'un dispositif suivant l'invention équipé d'un bouchon biologique.

The invention will be better understood with the aid of the description which follows, given solely by way of example and done with reference to the appended drawings, in which:

• Fig. 1 is a schematic sectional view of a fire stop device according to the invention placed in a solid concrete wall;
• Fig. 2 is a view similar to that of FIG. 1 showing a phase of preparation of a hollow rubble wall for the installation of the device according to the invention;
• Fig.3 shows the device according to the invention placed in a hollow rubble wall;
• Fig.4 shows in section a prefabricated device;
• Fig.5 is a sectional view of a hollow block wall for receiving the prefabricated device of Fig.4;
• Fig.6 is a sectional view of the device according to the invention mounted in a wall provided with an intermediate expansion joint;
• Fig.7 and 8 are partial sectional views of a device according to the invention crossed by cables, respectively before and after a fire;
• Fig.9 is a front view on a larger scale of a closing flap fitted to a half-sheath of the device according to the invention;
• Fig.10 and 11 are respectively side views of two variants of flap half-sleeves; and
• Fig.12 is a side sectional view of a device according to the invention equipped with a biological plug.

The fire-rated feedthrough device, also known as a wafer stop hopper shown in Fig. 1, is placed in a solid M wall of concrete.

In a passage 1 formed in the wall, opening onto the two faces of the latter, two metal half-sleeves 2,3 are arranged, the internal ends of which are arranged with a gap of thermal insulation 4 left between them and the ends of which open out on the faces of the wall M protrude slightly from these faces.

On each of the outer ends of the half-sleeves 2 and 3, there is articulated a shutter or tape 5.6 connected to the corresponding half-sleeve by a pin 7.8 protected by an anti-corrosion treatment and arranged to so that the flap or tape 5.6 can be applied to its seat 9, 10 formed by the end of the corresponding half-sheath, under the effect of its own weight.

Each of the flaps 5,6 has fixed on its face opposite the corresponding half-sheath 2,3, a plug 11,12 of intumescent fire-resistant composite product fixed to the flap by means of a corrosion-resistant metal screw and poor thermal conductor such as stainless steel (not shown) with possibly additional bonding in order to increase the adhesion of the plug to the flap and avoid mechanical fatigue of the assembly linked to the openings and closings.

The caps 11, 12 made of composite material are replaceable parts.

The half-sleeves 2, 3 are placed in the passage 1 and glued to the wall of the passage 1 by means of an appropriate adhesive such as an epoxy adhesive.

The vertical positions of the flaps 5.6 and horizontal of their hinges 7.8 will be scrupulously observed to ensure the proper functioning of the flaps by gravity.

The spacing or interval 4 between the half-sleeves is for example from 1 to 3 cm to avoid thermal bridges.

If the wall to be fitted is solid rubble, the installation technique is the same as that which has just been described for a concrete wall.

We will now refer to Fig. 2 and 3 which show two successive phases of installation of the device according to the invention in a hollow rubble wall.

In the passage or coring 15 formed through a rubble of the wall provided with one or more interior cavities 16, a formwork tube 17 made of polyvinyl chloride for example is first introduced.

Next, a mortar grout 18 is injected into the cavity or cavities or cells 16.

After setting the mortar, the shuttering tube 17 is removed and the passage 15 is then ready to receive a device according to the invention according to the same laying technique as that described with reference to Fig.1.

Since the fire breakthrough or stop hopper device in Fig. 3 is identical to that in Fig. 1, its components are given the same reference numbers.

It is also possible to envisage the production of fire protection devices according to the invention in prefabricated form to equip for example new constructions or even existing concrete block partitions.

To this end, the device is produced by mounting in a concrete block 20 having the dimensions of a standard concrete block which it is intended to replace in a partition and provided with a passage 21 for receiving the half-sleeves. 2 and 3.

The technique for mounting and fixing the half-sleeves in the passage 21 is the same as that described with reference to Fig.1.

The manufacture of such prefabricated devices can then be treated and monitored.

To install the prefabricated device shown in Fig.4, a space 22 of the value of a concrete block is stripped in the partition to be fitted shown in Fig.5 and the block 20 fitted with the following crossing device is put in place the invention.

In Fig.6, there is shown a crossing device according to the invention mounted in a concrete wall in two parts P1, P2 separated by an expansion joint J.

To ensure the installation of the device, a borehole 25 is made in the wall, which is lined with a sheath 26, for example made of fiber cement, of dimensions suitable for the half-sheaths 2 and 3 of the crossing device.

The role of the sleeve 26 is to prevent deterioration of the expansion joint J.

The installation of the device is then ensured as described with reference to Fig.1.

In Fig.7, there is partially shown the crossing device according to the invention in which cables C are engaged which rest on the half-sleeves 2 and 3 of the device and which slightly raise the shutter flaps such as flap 5 equipped of its plug 11 of fire-resistant composite material.

The device shown in Fig. 7 is in a normal state in the absence of fire.

In Fig.8, the same device is shown in Fig.7, but after a fire has started and the plug 11 made of fire-resistant composite material has closed the end of the cavity of the half-sheath 2 by swelling under the effect of heat caused by a fire.

Of course, the other plug fitted to the shutter of the half-sheath 3 has closed the other end of the passage thus formed, so that any propagation of fire through the crossing device is thus prohibited .

In Fig. 9, an embodiment of a half-sheath of the crossing device according to the invention is shown, for example the half-sheath 3 equipped with its shutter 6.

The half-sheath 3 has at its upper part a yoke 28 whose branches are fixed to the half-sheath 3 by welding and in which the axis is mounted horizontal 8 of articulation of the shutter 6 on the half-sheath 3. The flap 6 has a straight side 29 on which are fixed lugs 30 for connection with the axis 8.

At its end opposite to the straight side 29, the flap comprises a fork 31 cooperating with a fitting 32 provided with an eyelet 33, fixed to the half-sleeve 3 in a position roughly diametrically opposite to the yoke 28 and thus allowing locking the flap 6 in the closed position against the end of the half-sheath 3 for example using a padlock not shown.

The fire-resistant intumescent composite material plug 12 is fixed to the flap 6 in a position coaxial with the half-sheath 3, for example by means of a screw 34 made of stainless steel. A metal plate 35 forming a reflector and provided with a notch 36 for orientation of the expansion of the fire-resistant product, is fixed on the pad 12 in order to guide its expansion in the event of fire. The notch 36 is placed near the position of the conduits (C) for temporary connection.

Although in the present example, a notch 36 is provided in each plate 35, it is possible to provide several notches. Furthermore, the expansion of the fire-resistant product can be guided by a guide with a shape different from that of the plate 35.

The half-sleeve shown in side view in Fig.10 corresponds to the half-sleeve of Fig.9 and has one end 10 perpendicular to its axis, so that when closed, the shutter occupies a vertical position.

The half-sleeve 37 represented in FIG. 11 differs from that of FIG. 10, in that its end 38 forming a seat for the flap 39, is inclined relative to the axis of the half-sleeve, so that in the closed position, the flap 39 occupies an oblique position, which improves the application of the flap 39 by its own weight against its seat 38.

However, it is understood that the half-sleeve 37 being of circular section, its inclined end 38 is of elliptical shape and the shutter 39 must therefore have a corresponding shape.

In Fig.12, there is shown a crossing device according to the invention formed by two half-sleeves 40 and 41 with inclined seats of the type described with reference to Fig.11.

In the sheath constituted by the two half-sheaths is disposed a biological protection plug 42 connected to one of the shutter flaps 40 by a cable 43.

The plug 42 has a length which is a function of the effectiveness of the protection sought and the thickness of the wall equipped with the crossing device according to the invention.

It is advantageously made of a suitable gammaphage and neutron-absorbing material, in particular as described in French patent n ° 86 15 855, filed on January 14, 1986.

The crossing device according to the invention which has just been described was subjected to fire tests which proved to be conclusive, because the temperature rises observed after two hours remained within the admissible limits. The crossing device according to the invention is relatively simple to install and is suitable for the most diverse types of partitions.

The half-sleeves of the device are advantageously made of galvanized sheet metal or painted, in a decontaminable system in order to limit their maintenance.

The installation of the device does not require any special qualification.

Claims (11)

1. Fire-resistant device for ensuring the passage through a separating wall between two areas of an installation, of flexible electric power supply pipes (C) and/or cables and the like having, located in the wall, a passage (1, 21, 25) issuing onto the two faces thereof and in which are located two metallic half-sleeves (2, 3), each provided at its end outside the wall with a flap (5, 6) articulated on the corresponding half-sleeve, characterized in that the two metallic half-sleeves (2, 3) are separated by a gap (4), preventing the formation of a heat bridge, and in that the flap (5, 6) of each sleeve is a gravity closing flap provided with a composite, fire-resistant material plug (11, 12).
2. Fire-resistant device according to claim 1, characterized in that the two half-sleeves (2, 3) are fitted in the passage (1, 25) either directly or by means of a sleeve (26) lining said passage.
3. Fire-resistant device according to one of the claims 1 and 2, characterized in that the composite, fire-resistant material plugs (11, 12) are fixed to the sealing flaps (5, 6), each by means of a screw (38) made from a corrosion-resistant, poor heat conducting material.
4. Fire-resistant device according to one of the claims 1 to 3, characterized in that for fixing the plugs (11, 12) to the sealing flaps, there is a complimentary bonding of the plugs to the flaps.
5. Fire-resistant device according to claim 4, characterized in that the composite, fire-resistant material is intumescent and in that with each plug is associated a guide (35, 36) for orienting the expansion of the fire-resistant material.
6. Fire-resistant device according to claim 5, characterized in that the orientation guide is a metal plate (35) forming a reflector and having in the vicinity of the position of the temporary connecting pipes at least one cutout (36) for orienting the expansion of the fire-resistant material.
7. Fire-resistant device according to one of the claims 1 to 6, characterized in that the ends (9, 10) of the half-sleeves (2, 3) forming seats for the sealing flaps (5, 6) are perpendicular to the axes of the half-sleeves.
8. Fire-resistant device according to one of the claims 1 to 6, characterized in that the ends (38) of the half-sleeves (37; 40, 41) forming seats for the sealing flaps (39) are inclined with respect to the axes of the half-sleeves.
9. Fire-resistant device according to one of the claims 1 to 8, characterized in that there are means (31, 32, 33) for locking the sealing flaps (6) in the sealing position of the half-sleeves (3) to which they are articulated.
10. Fire-resistant device according to one of the claims 1 to 9, characterized in that a biological protection material plug (42) is located in the passage defined by the half-sleeves (40, 41).
11. Fire-resistant device according to one of the claims 1 and 3 to 10, characterized in that it is prefabricated in a concrete block having dimensions corresponding to those of a standard bond stone, the reception passage (21) for the half-sleeves (2, 3) being made in said concrete block.

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